st.c

   1 /* See LICENSE for license details. */
   2 #include <ctype.h>
   3 #include <errno.h>
   4 #include <fcntl.h>
   5 #include <limits.h>
   6 #include <locale.h>
   7 #include <pwd.h>
   8 #include <stdarg.h>
   9 #include <stdbool.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <signal.h>
  14 #include <stdint.h>
  15 #include <sys/ioctl.h>
  16 #include <sys/select.h>
  17 #include <sys/stat.h>
  18 #include <sys/time.h>
  19 #include <sys/types.h>
  20 #include <sys/wait.h>
  21 #include <time.h>
  22 #include <unistd.h>
  23 #include <libgen.h>
  24 #include <X11/Xatom.h>
  25 #include <X11/Xlib.h>
  26 #include <X11/Xutil.h>
  27 #include <X11/cursorfont.h>
  28 #include <X11/keysym.h>
  29 #include <X11/Xft/Xft.h>
  30 #include <X11/XKBlib.h>
  31 #include <fontconfig/fontconfig.h>
  32 #include <wchar.h>
  33
  34 #include "arg.h"
  35
  36 char *argv0;
  37
  38 #define Glyph Glyph_
  39 #define Font Font_
  40
  41 #if   defined(__linux)
  42  #include <pty.h>
  43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  44  #include <util.h>
  45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
  46  #include <libutil.h>
  47 #endif
  48
  49
  50 /* XEMBED messages */
  51 #define XEMBED_FOCUS_IN  4
  52 #define XEMBED_FOCUS_OUT 5
  53
  54 /* Arbitrary sizes */
  55 #define UTF_INVALID   0xFFFD
  56 #define UTF_SIZ       4
  57 #define ESC_BUF_SIZ   (128*UTF_SIZ)
  58 #define ESC_ARG_SIZ   16
  59 #define STR_BUF_SIZ   ESC_BUF_SIZ
  60 #define STR_ARG_SIZ   ESC_ARG_SIZ
  61 #define DRAW_BUF_SIZ  20*1024
  62 #define XK_ANY_MOD    UINT_MAX
  63 #define XK_NO_MOD     0
  64 #define XK_SWITCH_MOD (1<<13)
  65
  66 /* macros */
  67 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
  68 #define MAX(a, b)  ((a) < (b) ? (b) : (a))
  69 #define LEN(a)     (sizeof(a) / sizeof(a)[0])
  70 #define DEFAULT(a, b)     (a) = (a) ? (a) : (b)
  71 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
  72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
  73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
  74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
  75 #define ISDELIM(u) (BETWEEN(u, 0, 127) && strchr(worddelimiters, u) != NULL)
  76 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
  79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
  80 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
  81
  82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
  83 #define IS_TRUECOL(x)    (1 << 24 & (x))
  84 #define TRUERED(x)       (((x) & 0xff0000) >> 8)
  85 #define TRUEGREEN(x)     (((x) & 0xff00))
  86 #define TRUEBLUE(x)      (((x) & 0xff) << 8)
  87
  88
  89 enum glyph_attribute {
  90         ATTR_NULL      = 0,
  91         ATTR_BOLD      = 1 << 0,
  92         ATTR_FAINT     = 1 << 1,
  93         ATTR_ITALIC    = 1 << 2,
  94         ATTR_UNDERLINE = 1 << 3,
  95         ATTR_BLINK     = 1 << 4,
  96         ATTR_REVERSE   = 1 << 5,
  97         ATTR_INVISIBLE = 1 << 6,
  98         ATTR_STRUCK    = 1 << 7,
  99         ATTR_WRAP      = 1 << 8,
 100         ATTR_WIDE      = 1 << 9,
 101         ATTR_WDUMMY    = 1 << 10,
 102 };
 103
 104 enum cursor_movement {
 105         CURSOR_SAVE,
 106         CURSOR_LOAD
 107 };
 108
 109 enum cursor_state {
 110         CURSOR_DEFAULT  = 0,
 111         CURSOR_WRAPNEXT = 1,
 112         CURSOR_ORIGIN   = 2
 113 };
 114
 115 enum term_mode {
 116         MODE_WRAP        = 1 << 0,
 117         MODE_INSERT      = 1 << 1,
 118         MODE_APPKEYPAD   = 1 << 2,
 119         MODE_ALTSCREEN   = 1 << 3,
 120         MODE_CRLF        = 1 << 4,
 121         MODE_MOUSEBTN    = 1 << 5,
 122         MODE_MOUSEMOTION = 1 << 6,
 123         MODE_REVERSE     = 1 << 7,
 124         MODE_KBDLOCK     = 1 << 8,
 125         MODE_HIDE        = 1 << 9,
 126         MODE_ECHO        = 1 << 10,
 127         MODE_APPCURSOR   = 1 << 11,
 128         MODE_MOUSESGR    = 1 << 12,
 129         MODE_8BIT        = 1 << 13,
 130         MODE_BLINK       = 1 << 14,
 131         MODE_FBLINK      = 1 << 15,
 132         MODE_FOCUS       = 1 << 16,
 133         MODE_MOUSEX10    = 1 << 17,
 134         MODE_MOUSEMANY   = 1 << 18,
 135         MODE_BRCKTPASTE  = 1 << 19,
 136         MODE_PRINT       = 1 << 20,
 137         MODE_MOUSE       = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
 138                           |MODE_MOUSEMANY,
 139 };
 140
 141 enum charset {
 142         CS_GRAPHIC0,
 143         CS_GRAPHIC1,
 144         CS_UK,
 145         CS_USA,
 146         CS_MULTI,
 147         CS_GER,
 148         CS_FIN
 149 };
 150
 151 enum escape_state {
 152         ESC_START      = 1,
 153         ESC_CSI        = 2,
 154         ESC_STR        = 4,  /* DCS, OSC, PM, APC */
 155         ESC_ALTCHARSET = 8,
 156         ESC_STR_END    = 16, /* a final string was encountered */
 157         ESC_TEST       = 32, /* Enter in test mode */
 158 };
 159
 160 enum window_state {
 161         WIN_VISIBLE = 1,
 162         WIN_FOCUSED = 2
 163 };
 164
 165 enum selection_type {
 166         SEL_REGULAR = 1,
 167         SEL_RECTANGULAR = 2
 168 };
 169
 170 enum selection_snap {
 171         SNAP_WORD = 1,
 172         SNAP_LINE = 2
 173 };
 174
 175 typedef unsigned char uchar;
 176 typedef unsigned int uint;
 177 typedef unsigned long ulong;
 178 typedef unsigned short ushort;
 179
 180 typedef XftDraw *Draw;
 181 typedef XftColor Color;
 182
 183 typedef struct {
 184         long u;           /* character code */
 185         ushort mode;      /* attribute flags */
 186         ushort fg;        /* foreground  */
 187         ushort bg;        /* background  */
 188 } Glyph;
 189
 190 typedef Glyph *Line;
 191
 192 typedef struct {
 193         Glyph attr; /* current char attributes */
 194         int x;
 195         int y;
 196         char state;
 197 } TCursor;
 198
 199 /* CSI Escape sequence structs */
 200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
 201 typedef struct {
 202         char buf[ESC_BUF_SIZ]; /* raw string */
 203         int len;               /* raw string length */
 204         char priv;
 205         int arg[ESC_ARG_SIZ];
 206         int narg;              /* nb of args */
 207         char mode[2];
 208 } CSIEscape;
 209
 210 /* STR Escape sequence structs */
 211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
 212 typedef struct {
 213         char type;             /* ESC type ... */
 214         char buf[STR_BUF_SIZ]; /* raw string */
 215         int len;               /* raw string length */
 216         char *args[STR_ARG_SIZ];
 217         int narg;              /* nb of args */
 218 } STREscape;
 219
 220 /* Internal representation of the screen */
 221 typedef struct {
 222         int row;      /* nb row */
 223         int col;      /* nb col */
 224         Line *line;   /* screen */
 225         Line *alt;    /* alternate screen */
 226         bool *dirty;  /* dirtyness of lines */
 227         TCursor c;    /* cursor */
 228         int top;      /* top    scroll limit */
 229         int bot;      /* bottom scroll limit */
 230         int mode;     /* terminal mode flags */
 231         int esc;      /* escape state flags */
 232         char trantbl[4]; /* charset table translation */
 233         int charset;  /* current charset */
 234         int icharset; /* selected charset for sequence */
 235         bool numlock; /* lock numbers in keyboard */
 236         bool *tabs;
 237 } Term;
 238
 239 /* Purely graphic info */
 240 typedef struct {
 241         Display *dpy;
 242         Colormap cmap;
 243         Window win;
 244         Drawable buf;
 245         Atom xembed, wmdeletewin, netwmname, netwmpid;
 246         XIM xim;
 247         XIC xic;
 248         Draw draw;
 249         Visual *vis;
 250         XSetWindowAttributes attrs;
 251         int scr;
 252         bool isfixed; /* is fixed geometry? */
 253         int l, t; /* left and top offset */
 254         int gm; /* geometry mask */
 255         int tw, th; /* tty width and height */
 256         int w, h; /* window width and height */
 257         int ch; /* char height */
 258         int cw; /* char width  */
 259         char state; /* focus, redraw, visible */
 260         int cursor; /* cursor style */
 261 } XWindow;
 262
 263 typedef struct {
 264         uint b;
 265         uint mask;
 266         char *s;
 267 } Mousekey;
 268
 269 typedef struct {
 270         KeySym k;
 271         uint mask;
 272         char *s;
 273         /* three valued logic variables: 0 indifferent, 1 on, -1 off */
 274         signed char appkey;    /* application keypad */
 275         signed char appcursor; /* application cursor */
 276         signed char crlf;      /* crlf mode          */
 277 } Key;
 278
 279 typedef struct {
 280         int mode;
 281         int type;
 282         int snap;
 283         /*
 284          * Selection variables:
 285          * nb – normalized coordinates of the beginning of the selection
 286          * ne – normalized coordinates of the end of the selection
 287          * ob – original coordinates of the beginning of the selection
 288          * oe – original coordinates of the end of the selection
 289          */
 290         struct {
 291                 int x, y;
 292         } nb, ne, ob, oe;
 293
 294         char *primary, *clipboard;
 295         Atom xtarget;
 296         bool alt;
 297         struct timespec tclick1;
 298         struct timespec tclick2;
 299 } Selection;
 300
 301 typedef union {
 302         int i;
 303         uint ui;
 304         float f;
 305         const void *v;
 306 } Arg;
 307
 308 typedef struct {
 309         uint mod;
 310         KeySym keysym;
 311         void (*func)(const Arg *);
 312         const Arg arg;
 313 } Shortcut;
 314
 315 /* function definitions used in config.h */
 316 static void clipcopy(const Arg *);
 317 static void clippaste(const Arg *);
 318 static void numlock(const Arg *);
 319 static void selpaste(const Arg *);
 320 static void xzoom(const Arg *);
 321 static void xzoomabs(const Arg *);
 322 static void xzoomreset(const Arg *);
 323 static void printsel(const Arg *);
 324 static void printscreen(const Arg *) ;
 325 static void toggleprinter(const Arg *);
 326
 327 /* Config.h for applying patches and the configuration. */
 328 #include "config.h"
 329
 330 /* Font structure */
 331 typedef struct {
 332         int height;
 333         int width;
 334         int ascent;
 335         int descent;
 336         short lbearing;
 337         short rbearing;
 338         XftFont *match;
 339         FcFontSet *set;
 340         FcPattern *pattern;
 341 } Font;
 342
 343 /* Drawing Context */
 344 typedef struct {
 345         Color col[MAX(LEN(colorname), 256)];
 346         Font font, bfont, ifont, ibfont;
 347         GC gc;
 348 } DC;
 349
 350 static void die(const char *, ...);
 351 static void draw(void);
 352 static void redraw(void);
 353 static void drawregion(int, int, int, int);
 354 static void execsh(void);
 355 static void stty(void);
 356 static void sigchld(int);
 357 static void run(void);
 358
 359 static void csidump(void);
 360 static void csihandle(void);
 361 static void csiparse(void);
 362 static void csireset(void);
 363 static int eschandle(uchar);
 364 static void strdump(void);
 365 static void strhandle(void);
 366 static void strparse(void);
 367 static void strreset(void);
 368
 369 static int tattrset(int);
 370 static void tprinter(char *, size_t);
 371 static void tdumpsel(void);
 372 static void tdumpline(int);
 373 static void tdump(void);
 374 static void tclearregion(int, int, int, int);
 375 static void tcursor(int);
 376 static void tdeletechar(int);
 377 static void tdeleteline(int);
 378 static void tinsertblank(int);
 379 static void tinsertblankline(int);
 380 static int tlinelen(int);
 381 static void tmoveto(int, int);
 382 static void tmoveato(int, int);
 383 static void tnew(int, int);
 384 static void tnewline(int);
 385 static void tputtab(int);
 386 static void tputc(long);
 387 static void treset(void);
 388 static void tresize(int, int);
 389 static void tscrollup(int, int);
 390 static void tscrolldown(int, int);
 391 static void tsetattr(int *, int);
 392 static void tsetchar(long, Glyph *, int, int);
 393 static void tsetscroll(int, int);
 394 static void tswapscreen(void);
 395 static void tsetdirt(int, int);
 396 static void tsetdirtattr(int);
 397 static void tsetmode(bool, bool, int *, int);
 398 static void tfulldirt(void);
 399 static void techo(long);
 400 static void tcontrolcode(uchar );
 401 static void tdectest(char );
 402 static int32_t tdefcolor(int *, int *, int);
 403 static void tdeftran(char);
 404 static inline bool match(uint, uint);
 405 static void ttynew(void);
 406 static void ttyread(void);
 407 static void ttyresize(void);
 408 static void ttysend(char *, size_t);
 409 static void ttywrite(const char *, size_t);
 410 static void tstrsequence(uchar);
 411
 412 static inline ushort sixd_to_16bit(int);
 413 static void xdraws(char *, Glyph, int, int, int, int);
 414 static void xdrawglyph(Glyph, int, int);
 415 static void xhints(void);
 416 static void xclear(int, int, int, int);
 417 static void xdrawcursor(void);
 418 static void xinit(void);
 419 static void xloadcols(void);
 420 static int xsetcolorname(int, const char *);
 421 static int xgeommasktogravity(int);
 422 static int xloadfont(Font *, FcPattern *);
 423 static void xloadfonts(char *, double);
 424 static void xsettitle(char *);
 425 static void xresettitle(void);
 426 static void xsetpointermotion(int);
 427 static void xseturgency(int);
 428 static void xsetsel(char *, Time);
 429 static void xtermclear(int, int, int, int);
 430 static void xunloadfont(Font *);
 431 static void xunloadfonts(void);
 432 static void xresize(int, int);
 433
 434 static void expose(XEvent *);
 435 static void visibility(XEvent *);
 436 static void unmap(XEvent *);
 437 static char *kmap(KeySym, uint);
 438 static void kpress(XEvent *);
 439 static void cmessage(XEvent *);
 440 static void cresize(int, int);
 441 static void resize(XEvent *);
 442 static void focus(XEvent *);
 443 static void brelease(XEvent *);
 444 static void bpress(XEvent *);
 445 static void bmotion(XEvent *);
 446 static void selnotify(XEvent *);
 447 static void selclear(XEvent *);
 448 static void selrequest(XEvent *);
 449
 450 static void selinit(void);
 451 static void selnormalize(void);
 452 static inline bool selected(int, int);
 453 static char *getsel(void);
 454 static void selcopy(Time);
 455 static void selscroll(int, int);
 456 static void selsnap(int, int *, int *, int);
 457 static int x2col(int);
 458 static int y2row(int);
 459 static void getbuttoninfo(XEvent *);
 460 static void mousereport(XEvent *);
 461
 462 static size_t utf8decode(char *, long *, size_t);
 463 static long utf8decodebyte(char, size_t *);
 464 static size_t utf8encode(long, char *);
 465 static char utf8encodebyte(long, size_t);
 466 static size_t utf8validate(long *, size_t);
 467
 468 static ssize_t xwrite(int, const char *, size_t);
 469 static void *xmalloc(size_t);
 470 static void *xrealloc(void *, size_t);
 471 static char *xstrdup(char *);
 472
 473 static void usage(void);
 474
 475 static void (*handler[LASTEvent])(XEvent *) = {
 476         [KeyPress] = kpress,
 477         [ClientMessage] = cmessage,
 478         [ConfigureNotify] = resize,
 479         [VisibilityNotify] = visibility,
 480         [UnmapNotify] = unmap,
 481         [Expose] = expose,
 482         [FocusIn] = focus,
 483         [FocusOut] = focus,
 484         [MotionNotify] = bmotion,
 485         [ButtonPress] = bpress,
 486         [ButtonRelease] = brelease,
 487 /*
 488  * Uncomment if you want the selection to disappear when you select something
 489  * different in another window.
 490  */
 491 /*      [SelectionClear] = selclear, */
 492         [SelectionNotify] = selnotify,
 493         [SelectionRequest] = selrequest,
 494 };
 495
 496 /* Globals */
 497 static DC dc;
 498 static XWindow xw;
 499 static Term term;
 500 static CSIEscape csiescseq;
 501 static STREscape strescseq;
 502 static int cmdfd;
 503 static pid_t pid;
 504 static Selection sel;
 505 static int iofd = STDOUT_FILENO;
 506 static char **opt_cmd = NULL;
 507 static char *opt_io = NULL;
 508 static char *opt_title = NULL;
 509 static char *opt_embed = NULL;
 510 static char *opt_class = NULL;
 511 static char *opt_font = NULL;
 512 static char *opt_line = NULL;
 513 static int oldbutton = 3; /* button event on startup: 3 = release */
 514
 515 static char *usedfont = NULL;
 516 static double usedfontsize = 0;
 517 static double defaultfontsize = 0;
 518
 519 static uchar utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
 520 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
 521 static long utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
 522 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
 523
 524 /* Font Ring Cache */
 525 enum {
 526         FRC_NORMAL,
 527         FRC_ITALIC,
 528         FRC_BOLD,
 529         FRC_ITALICBOLD
 530 };
 531
 532 typedef struct {
 533         XftFont *font;
 534         int flags;
 535         long unicodep;
 536 } Fontcache;
 537
 538 /* Fontcache is an array now. A new font will be appended to the array. */
 539 static Fontcache frc[16];
 540 static int frclen = 0;
 541
 542 ssize_t
 543 xwrite(int fd, const char *s, size_t len) {
 544         size_t aux = len;
 545
 546         while(len > 0) {
 547                 ssize_t r = write(fd, s, len);
 548                 if(r < 0)
 549                         return r;
 550                 len -= r;
 551                 s += r;
 552         }
 553         return aux;
 554 }
 555
 556 void *
 557 xmalloc(size_t len) {
 558         void *p = malloc(len);
 559
 560         if(!p)
 561                 die("Out of memory\n");
 562
 563         return p;
 564 }
 565
 566 void *
 567 xrealloc(void *p, size_t len) {
 568         if((p = realloc(p, len)) == NULL)
 569                 die("Out of memory\n");
 570
 571         return p;
 572 }
 573
 574 char *
 575 xstrdup(char *s) {
 576         if((s = strdup(s)) == NULL)
 577                 die("Out of memory\n");
 578
 579         return s;
 580 }
 581
 582 size_t
 583 utf8decode(char *c, long *u, size_t clen) {
 584         size_t i, j, len, type;
 585         long udecoded;
 586
 587         *u = UTF_INVALID;
 588         if(!clen)
 589                 return 0;
 590         udecoded = utf8decodebyte(c[0], &len);
 591         if(!BETWEEN(len, 1, UTF_SIZ))
 592                 return 1;
 593         for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
 594                 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
 595                 if(type != 0)
 596                         return j;
 597         }
 598         if(j < len)
 599                 return 0;
 600         *u = udecoded;
 601         utf8validate(u, len);
 602         return len;
 603 }
 604
 605 long
 606 utf8decodebyte(char c, size_t *i) {
 607         for(*i = 0; *i < LEN(utfmask); ++(*i))
 608                 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
 609                         return (uchar)c & ~utfmask[*i];
 610         return 0;
 611 }
 612
 613 size_t
 614 utf8encode(long u, char *c) {
 615         size_t len, i;
 616
 617         len = utf8validate(&u, 0);
 618         if(len > UTF_SIZ)
 619                 return 0;
 620         for(i = len - 1; i != 0; --i) {
 621                 c[i] = utf8encodebyte(u, 0);
 622                 u >>= 6;
 623         }
 624         c[0] = utf8encodebyte(u, len);
 625         return len;
 626 }
 627
 628 char
 629 utf8encodebyte(long u, size_t i) {
 630         return utfbyte[i] | (u & ~utfmask[i]);
 631 }
 632
 633 size_t
 634 utf8validate(long *u, size_t i) {
 635         if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
 636                 *u = UTF_INVALID;
 637         for(i = 1; *u > utfmax[i]; ++i)
 638                 ;
 639         return i;
 640 }
 641
 642 void
 643 selinit(void) {
 644         memset(&sel.tclick1, 0, sizeof(sel.tclick1));
 645         memset(&sel.tclick2, 0, sizeof(sel.tclick2));
 646         sel.mode = 0;
 647         sel.ob.x = -1;
 648         sel.primary = NULL;
 649         sel.clipboard = NULL;
 650         sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
 651         if(sel.xtarget == None)
 652                 sel.xtarget = XA_STRING;
 653 }
 654
 655 int
 656 x2col(int x) {
 657         x -= borderpx;
 658         x /= xw.cw;
 659
 660         return LIMIT(x, 0, term.col-1);
 661 }
 662
 663 int
 664 y2row(int y) {
 665         y -= borderpx;
 666         y /= xw.ch;
 667
 668         return LIMIT(y, 0, term.row-1);
 669 }
 670
 671 int
 672 tlinelen(int y) {
 673         int i = term.col;
 674
 675         if(term.line[y][i - 1].mode & ATTR_WRAP)
 676                 return i;
 677
 678         while(i > 0 && term.line[y][i - 1].u == ' ')
 679                 --i;
 680
 681         return i;
 682 }
 683
 684 void
 685 selnormalize(void) {
 686         int i;
 687
 688         if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
 689                 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
 690                 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
 691         } else {
 692                 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
 693                 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
 694         }
 695         sel.nb.y = MIN(sel.ob.y, sel.oe.y);
 696         sel.ne.y = MAX(sel.ob.y, sel.oe.y);
 697
 698         selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
 699         selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
 700
 701         /* expand selection over line breaks */
 702         if (sel.type == SEL_RECTANGULAR)
 703                 return;
 704         i = tlinelen(sel.nb.y);
 705         if (i < sel.nb.x)
 706                 sel.nb.x = i;
 707         if (tlinelen(sel.ne.y) <= sel.ne.x)
 708                 sel.ne.x = term.col - 1;
 709 }
 710
 711 bool
 712 selected(int x, int y) {
 713         if(sel.type == SEL_RECTANGULAR)
 714                 return BETWEEN(y, sel.nb.y, sel.ne.y)
 715                     && BETWEEN(x, sel.nb.x, sel.ne.x);
 716
 717         return BETWEEN(y, sel.nb.y, sel.ne.y)
 718             && (y != sel.nb.y || x >= sel.nb.x)
 719             && (y != sel.ne.y || x <= sel.ne.x);
 720 }
 721
 722 void
 723 selsnap(int mode, int *x, int *y, int direction) {
 724         int newx, newy, xt, yt;
 725         bool delim, prevdelim;
 726         Glyph *gp, *prevgp;
 727
 728         switch(mode) {
 729         case SNAP_WORD:
 730                 /*
 731                  * Snap around if the word wraps around at the end or
 732                  * beginning of a line.
 733                  */
 734                 prevgp = &term.line[*y][*x];
 735                 prevdelim = ISDELIM(prevgp->u);
 736                 for(;;) {
 737                         newx = *x + direction;
 738                         newy = *y;
 739                         if(!BETWEEN(newx, 0, term.col - 1)) {
 740                                 newy += direction;
 741                                 newx = (newx + term.col) % term.col;
 742                                 if (!BETWEEN(newy, 0, term.row - 1))
 743                                         break;
 744
 745                                 if(direction > 0)
 746                                         yt = *y, xt = *x;
 747                                 else
 748                                         yt = newy, xt = newx;
 749                                 if(!(term.line[yt][xt].mode & ATTR_WRAP))
 750                                         break;
 751                         }
 752
 753                         if (newx >= tlinelen(newy))
 754                                 break;
 755
 756                         gp = &term.line[newy][newx];
 757                         delim = ISDELIM(gp->u);
 758                         if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
 759                                         || (delim && gp->u != prevgp->u)))
 760                                 break;
 761
 762                         *x = newx;
 763                         *y = newy;
 764                         prevgp = gp;
 765                         prevdelim = delim;
 766                 }
 767                 break;
 768         case SNAP_LINE:
 769                 /*
 770                  * Snap around if the the previous line or the current one
 771                  * has set ATTR_WRAP at its end. Then the whole next or
 772                  * previous line will be selected.
 773                  */
 774                 *x = (direction < 0) ? 0 : term.col - 1;
 775                 if(direction < 0 && *y > 0) {
 776                         for(; *y > 0; *y += direction) {
 777                                 if(!(term.line[*y-1][term.col-1].mode
 778                                                 & ATTR_WRAP)) {
 779                                         break;
 780                                 }
 781                         }
 782                 } else if(direction > 0 && *y < term.row-1) {
 783                         for(; *y < term.row; *y += direction) {
 784                                 if(!(term.line[*y][term.col-1].mode
 785                                                 & ATTR_WRAP)) {
 786                                         break;
 787                                 }
 788                         }
 789                 }
 790                 break;
 791         }
 792 }
 793
 794 void
 795 getbuttoninfo(XEvent *e) {
 796         int type;
 797         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 798
 799         sel.alt = IS_SET(MODE_ALTSCREEN);
 800
 801         sel.oe.x = x2col(e->xbutton.x);
 802         sel.oe.y = y2row(e->xbutton.y);
 803         selnormalize();
 804
 805         sel.type = SEL_REGULAR;
 806         for(type = 1; type < LEN(selmasks); ++type) {
 807                 if(match(selmasks[type], state)) {
 808                         sel.type = type;
 809                         break;
 810                 }
 811         }
 812 }
 813
 814 void
 815 mousereport(XEvent *e) {
 816         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 817             button = e->xbutton.button, state = e->xbutton.state,
 818             len;
 819         char buf[40];
 820         static int ox, oy;
 821
 822         /* from urxvt */
 823         if(e->xbutton.type == MotionNotify) {
 824                 if(x == ox && y == oy)
 825                         return;
 826                 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 827                         return;
 828                 /* MOUSE_MOTION: no reporting if no button is pressed */
 829                 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 830                         return;
 831
 832                 button = oldbutton + 32;
 833                 ox = x;
 834                 oy = y;
 835         } else {
 836                 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 837                         button = 3;
 838                 } else {
 839                         button -= Button1;
 840                         if(button >= 3)
 841                                 button += 64 - 3;
 842                 }
 843                 if(e->xbutton.type == ButtonPress) {
 844                         oldbutton = button;
 845                         ox = x;
 846                         oy = y;
 847                 } else if(e->xbutton.type == ButtonRelease) {
 848                         oldbutton = 3;
 849                         /* MODE_MOUSEX10: no button release reporting */
 850                         if(IS_SET(MODE_MOUSEX10))
 851                                 return;
 852                         if (button == 64 || button == 65)
 853                                 return;
 854                 }
 855         }
 856
 857         if(!IS_SET(MODE_MOUSEX10)) {
 858                 button += (state & ShiftMask   ? 4  : 0)
 859                         + (state & Mod4Mask    ? 8  : 0)
 860                         + (state & ControlMask ? 16 : 0);
 861         }
 862
 863         len = 0;
 864         if(IS_SET(MODE_MOUSESGR)) {
 865                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 866                                 button, x+1, y+1,
 867                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 868         } else if(x < 223 && y < 223) {
 869                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 870                                 32+button, 32+x+1, 32+y+1);
 871         } else {
 872                 return;
 873         }
 874
 875         ttywrite(buf, len);
 876 }
 877
 878 void
 879 bpress(XEvent *e) {
 880         struct timespec now;
 881         Mousekey *mk;
 882
 883         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 884                 mousereport(e);
 885                 return;
 886         }
 887
 888         for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
 889                 if(e->xbutton.button == mk->b
 890                                 && match(mk->mask, e->xbutton.state)) {
 891                         ttysend(mk->s, strlen(mk->s));
 892                         return;
 893                 }
 894         }
 895
 896         if(e->xbutton.button == Button1) {
 897                 clock_gettime(CLOCK_MONOTONIC, &now);
 898
 899                 /* Clear previous selection, logically and visually. */
 900                 selclear(NULL);
 901                 sel.mode = 1;
 902                 sel.type = SEL_REGULAR;
 903                 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
 904                 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
 905
 906                 /*
 907                  * If the user clicks below predefined timeouts specific
 908                  * snapping behaviour is exposed.
 909                  */
 910                 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
 911                         sel.snap = SNAP_LINE;
 912                 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
 913                         sel.snap = SNAP_WORD;
 914                 } else {
 915                         sel.snap = 0;
 916                 }
 917                 selnormalize();
 918
 919                 /*
 920                  * Draw selection, unless it's regular and we don't want to
 921                  * make clicks visible
 922                  */
 923                 if(sel.snap != 0) {
 924                         sel.mode++;
 925                         tsetdirt(sel.nb.y, sel.ne.y);
 926                 }
 927                 sel.tclick2 = sel.tclick1;
 928                 sel.tclick1 = now;
 929         }
 930 }
 931
 932 char *
 933 getsel(void) {
 934         char *str, *ptr;
 935         int y, bufsize, lastx, linelen;
 936         Glyph *gp, *last;
 937
 938         if(sel.ob.x == -1)
 939                 return NULL;
 940
 941         bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
 942         ptr = str = xmalloc(bufsize);
 943
 944         /* append every set & selected glyph to the selection */
 945         for(y = sel.nb.y; y <= sel.ne.y; y++) {
 946                 linelen = tlinelen(y);
 947
 948                 if(sel.type == SEL_RECTANGULAR) {
 949                         gp = &term.line[y][sel.nb.x];
 950                         lastx = sel.ne.x;
 951                 } else {
 952                         gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
 953                         lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
 954                 }
 955                 last = &term.line[y][MIN(lastx, linelen-1)];
 956                 while(last >= gp && last->u == ' ')
 957                         --last;
 958
 959                 for( ; gp <= last; ++gp) {
 960                         if(gp->mode & ATTR_WDUMMY)
 961                                 continue;
 962
 963                         ptr += utf8encode(gp->u, ptr);
 964                 }
 965
 966                 /*
 967                  * Copy and pasting of line endings is inconsistent
 968                  * in the inconsistent terminal and GUI world.
 969                  * The best solution seems like to produce '\n' when
 970                  * something is copied from st and convert '\n' to
 971                  * '\r', when something to be pasted is received by
 972                  * st.
 973                  * FIXME: Fix the computer world.
 974                  */
 975                 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
 976                         *ptr++ = '\n';
 977         }
 978         *ptr = 0;
 979         return str;
 980 }
 981
 982 void
 983 selcopy(Time t) {
 984         xsetsel(getsel(), t);
 985 }
 986
 987 void
 988 selnotify(XEvent *e) {
 989         ulong nitems, ofs, rem;
 990         int format;
 991         uchar *data, *last, *repl;
 992         Atom type;
 993         XSelectionEvent *xsev;
 994
 995         ofs = 0;
 996         xsev = &e->xselection;
 997         if (xsev->property == None)
 998             return;
 999         do {
1000                 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1001                                         BUFSIZ/4, False, AnyPropertyType,
1002                                         &type, &format, &nitems, &rem,
1003                                         &data)) {
1004                         fprintf(stderr, "Clipboard allocation failed\n");
1005                         return;
1006                 }
1007
1008                 /*
1009                  * As seen in getsel:
1010                  * Line endings are inconsistent in the terminal and GUI world
1011                  * copy and pasting. When receiving some selection data,
1012                  * replace all '\n' with '\r'.
1013                  * FIXME: Fix the computer world.
1014                  */
1015                 repl = data;
1016                 last = data + nitems * format / 8;
1017                 while((repl = memchr(repl, '\n', last - repl))) {
1018                         *repl++ = '\r';
1019                 }
1020
1021                 if(IS_SET(MODE_BRCKTPASTE))
1022                         ttywrite("\033[200~", 6);
1023                 ttysend((char *)data, nitems * format / 8);
1024                 if(IS_SET(MODE_BRCKTPASTE))
1025                         ttywrite("\033[201~", 6);
1026                 XFree(data);
1027                 /* number of 32-bit chunks returned */
1028                 ofs += nitems * format / 32;
1029         } while(rem > 0);
1030 }
1031
1032 void
1033 selpaste(const Arg *dummy) {
1034         XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1035                         xw.win, CurrentTime);
1036 }
1037
1038 void
1039 clipcopy(const Arg *dummy) {
1040         Atom clipboard;
1041
1042         if(sel.clipboard != NULL)
1043                 free(sel.clipboard);
1044
1045         if(sel.primary != NULL) {
1046                 sel.clipboard = xstrdup(sel.primary);
1047                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1048                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1049         }
1050 }
1051
1052 void
1053 clippaste(const Arg *dummy) {
1054         Atom clipboard;
1055
1056         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1057         XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1058                         xw.win, CurrentTime);
1059 }
1060
1061 void
1062 selclear(XEvent *e) {
1063         if(sel.ob.x == -1)
1064                 return;
1065         sel.ob.x = -1;
1066         tsetdirt(sel.nb.y, sel.ne.y);
1067 }
1068
1069 void
1070 selrequest(XEvent *e) {
1071         XSelectionRequestEvent *xsre;
1072         XSelectionEvent xev;
1073         Atom xa_targets, string, clipboard;
1074         char *seltext;
1075
1076         xsre = (XSelectionRequestEvent *) e;
1077         xev.type = SelectionNotify;
1078         xev.requestor = xsre->requestor;
1079         xev.selection = xsre->selection;
1080         xev.target = xsre->target;
1081         xev.time = xsre->time;
1082         if (xsre->property == None)
1083             xsre->property = xsre->target;
1084
1085         /* reject */
1086         xev.property = None;
1087
1088         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1089         if(xsre->target == xa_targets) {
1090                 /* respond with the supported type */
1091                 string = sel.xtarget;
1092                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1093                                 XA_ATOM, 32, PropModeReplace,
1094                                 (uchar *) &string, 1);
1095                 xev.property = xsre->property;
1096         } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1097                 /*
1098                  * xith XA_STRING non ascii characters may be incorrect in the
1099                  * requestor. It is not our problem, use utf8.
1100                  */
1101                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1102                 if(xsre->selection == XA_PRIMARY) {
1103                         seltext = sel.primary;
1104                 } else if(xsre->selection == clipboard) {
1105                         seltext = sel.clipboard;
1106                 } else {
1107                         fprintf(stderr,
1108                                 "Unhandled clipboard selection 0x%lx\n",
1109                                 xsre->selection);
1110                         return;
1111                 }
1112                 if(seltext != NULL) {
1113                         XChangeProperty(xsre->display, xsre->requestor,
1114                                         xsre->property, xsre->target,
1115                                         8, PropModeReplace,
1116                                         (uchar *)seltext, strlen(seltext));
1117                         xev.property = xsre->property;
1118                 }
1119         }
1120
1121         /* all done, send a notification to the listener */
1122         if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1123                 fprintf(stderr, "Error sending SelectionNotify event\n");
1124 }
1125
1126 void
1127 xsetsel(char *str, Time t) {
1128         free(sel.primary);
1129         sel.primary = str;
1130
1131         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1132         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1133             selclear(0);
1134 }
1135
1136 void
1137 brelease(XEvent *e) {
1138         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1139                 mousereport(e);
1140                 return;
1141         }
1142
1143         if(e->xbutton.button == Button2) {
1144                 selpaste(NULL);
1145         } else if(e->xbutton.button == Button1) {
1146                 if(sel.mode < 2) {
1147                         selclear(NULL);
1148                 } else {
1149                         getbuttoninfo(e);
1150                         selcopy(e->xbutton.time);
1151                 }
1152                 sel.mode = 0;
1153                 tsetdirt(sel.nb.y, sel.ne.y);
1154         }
1155 }
1156
1157 void
1158 bmotion(XEvent *e) {
1159         int oldey, oldex, oldsby, oldsey;
1160
1161         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1162                 mousereport(e);
1163                 return;
1164         }
1165
1166         if(!sel.mode)
1167                 return;
1168
1169         sel.mode++;
1170         oldey = sel.oe.y;
1171         oldex = sel.oe.x;
1172         oldsby = sel.nb.y;
1173         oldsey = sel.ne.y;
1174         getbuttoninfo(e);
1175
1176         if(oldey != sel.oe.y || oldex != sel.oe.x)
1177                 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1178 }
1179
1180 void
1181 die(const char *errstr, ...) {
1182         va_list ap;
1183
1184         va_start(ap, errstr);
1185         vfprintf(stderr, errstr, ap);
1186         va_end(ap);
1187         exit(EXIT_FAILURE);
1188 }
1189
1190 void
1191 execsh(void) {
1192         char **args, *sh, *prog;
1193         const struct passwd *pw;
1194         char buf[sizeof(long) * 8 + 1];
1195
1196         errno = 0;
1197         if((pw = getpwuid(getuid())) == NULL) {
1198                 if(errno)
1199                         die("getpwuid:%s\n", strerror(errno));
1200                 else
1201                         die("who are you?\n");
1202         }
1203
1204         if (!(sh = getenv("SHELL"))) {
1205                 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1206         }
1207
1208         if(opt_cmd)
1209                 prog = opt_cmd[0];
1210         else if(utmp)
1211                 prog = utmp;
1212         else
1213                 prog = sh;
1214         args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1215
1216         snprintf(buf, sizeof(buf), "%lu", xw.win);
1217
1218         unsetenv("COLUMNS");
1219         unsetenv("LINES");
1220         unsetenv("TERMCAP");
1221         setenv("LOGNAME", pw->pw_name, 1);
1222         setenv("USER", pw->pw_name, 1);
1223         setenv("SHELL", sh, 1);
1224         setenv("HOME", pw->pw_dir, 1);
1225         setenv("TERM", termname, 1);
1226         setenv("WINDOWID", buf, 1);
1227
1228         signal(SIGCHLD, SIG_DFL);
1229         signal(SIGHUP, SIG_DFL);
1230         signal(SIGINT, SIG_DFL);
1231         signal(SIGQUIT, SIG_DFL);
1232         signal(SIGTERM, SIG_DFL);
1233         signal(SIGALRM, SIG_DFL);
1234
1235         execvp(prog, args);
1236         _exit(EXIT_FAILURE);
1237 }
1238
1239 void
1240 sigchld(int a) {
1241         int stat, ret;
1242
1243         if(waitpid(pid, &stat, 0) < 0)
1244                 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1245
1246         ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1247         if (ret != EXIT_SUCCESS)
1248                 die("child finished with error '%d'\n", stat);
1249         exit(EXIT_SUCCESS);
1250 }
1251
1252
1253 void
1254 stty(void)
1255 {
1256         char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1257         size_t n, siz;
1258
1259         if((n = strlen(stty_args)) > sizeof(cmd)-1)
1260                 die("incorrect stty parameters\n");
1261         memcpy(cmd, stty_args, n);
1262         q = cmd + n;
1263         siz = sizeof(cmd) - n;
1264         for(p = opt_cmd; p && (s = *p); ++p) {
1265                 if((n = strlen(s)) > siz-1)
1266                         die("stty parameter length too long\n");
1267                 *q++ = ' ';
1268                 q = memcpy(q, s, n);
1269                 q += n;
1270                 siz-= n + 1;
1271         }
1272         *q = '\0';
1273         if (system(cmd) != 0)
1274             perror("Couldn't call stty");
1275 }
1276
1277 void
1278 ttynew(void) {
1279         int m, s;
1280         struct winsize w = {term.row, term.col, 0, 0};
1281
1282         if(opt_io) {
1283                 term.mode |= MODE_PRINT;
1284                 iofd = (!strcmp(opt_io, "-")) ?
1285                           STDOUT_FILENO :
1286                           open(opt_io, O_WRONLY | O_CREAT, 0666);
1287                 if(iofd < 0) {
1288                         fprintf(stderr, "Error opening %s:%s\n",
1289                                 opt_io, strerror(errno));
1290                 }
1291         }
1292
1293         if (opt_line) {
1294                 if((cmdfd = open(opt_line, O_RDWR)) < 0)
1295                         die("open line failed: %s\n", strerror(errno));
1296                 close(STDIN_FILENO);
1297                 dup(cmdfd);
1298                 stty();
1299                 return;
1300         }
1301
1302         /* seems to work fine on linux, openbsd and freebsd */
1303         if(openpty(&m, &s, NULL, NULL, &w) < 0)
1304                 die("openpty failed: %s\n", strerror(errno));
1305
1306         switch(pid = fork()) {
1307         case -1:
1308                 die("fork failed\n");
1309                 break;
1310         case 0:
1311                 close(iofd);
1312                 setsid(); /* create a new process group */
1313                 dup2(s, STDIN_FILENO);
1314                 dup2(s, STDOUT_FILENO);
1315                 dup2(s, STDERR_FILENO);
1316                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1317                         die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1318                 close(s);
1319                 close(m);
1320                 execsh();
1321                 break;
1322         default:
1323                 close(s);
1324                 cmdfd = m;
1325                 signal(SIGCHLD, sigchld);
1326                 break;
1327         }
1328 }
1329
1330 void
1331 ttyread(void) {
1332         static char buf[BUFSIZ];
1333         static int buflen = 0;
1334         char *ptr;
1335         int charsize; /* size of utf8 char in bytes */
1336         long unicodep;
1337         int ret;
1338
1339         /* append read bytes to unprocessed bytes */
1340         if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1341                 die("Couldn't read from shell: %s\n", strerror(errno));
1342
1343         /* process every complete utf8 char */
1344         buflen += ret;
1345         ptr = buf;
1346         while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1347                 tputc(unicodep);
1348                 ptr += charsize;
1349                 buflen -= charsize;
1350         }
1351
1352         /* keep any uncomplete utf8 char for the next call */
1353         memmove(buf, ptr, buflen);
1354 }
1355
1356 void
1357 ttywrite(const char *s, size_t n) {
1358         if(xwrite(cmdfd, s, n) == -1)
1359                 die("write error on tty: %s\n", strerror(errno));
1360 }
1361
1362 void
1363 ttysend(char *s, size_t n) {
1364         int len;
1365         long u;
1366
1367         ttywrite(s, n);
1368         if(IS_SET(MODE_ECHO))
1369                 while((len = utf8decode(s, &u, n)) > 0) {
1370                         techo(u);
1371                         n -= len;
1372                         s += len;
1373                 }
1374 }
1375
1376 void
1377 ttyresize(void) {
1378         struct winsize w;
1379
1380         w.ws_row = term.row;
1381         w.ws_col = term.col;
1382         w.ws_xpixel = xw.tw;
1383         w.ws_ypixel = xw.th;
1384         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1385                 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1386 }
1387
1388 int
1389 tattrset(int attr) {
1390         int i, j;
1391
1392         for(i = 0; i < term.row-1; i++) {
1393                 for(j = 0; j < term.col-1; j++) {
1394                         if(term.line[i][j].mode & attr)
1395                                 return 1;
1396                 }
1397         }
1398
1399         return 0;
1400 }
1401
1402 void
1403 tsetdirt(int top, int bot) {
1404         int i;
1405
1406         LIMIT(top, 0, term.row-1);
1407         LIMIT(bot, 0, term.row-1);
1408
1409         for(i = top; i <= bot; i++)
1410                 term.dirty[i] = 1;
1411 }
1412
1413 void
1414 tsetdirtattr(int attr) {
1415         int i, j;
1416
1417         for(i = 0; i < term.row-1; i++) {
1418                 for(j = 0; j < term.col-1; j++) {
1419                         if(term.line[i][j].mode & attr) {
1420                                 tsetdirt(i, i);
1421                                 break;
1422                         }
1423                 }
1424         }
1425 }
1426
1427 void
1428 tfulldirt(void) {
1429         tsetdirt(0, term.row-1);
1430 }
1431
1432 void
1433 tcursor(int mode) {
1434         static TCursor c[2];
1435         bool alt = IS_SET(MODE_ALTSCREEN);
1436
1437         if(mode == CURSOR_SAVE) {
1438                 c[alt] = term.c;
1439         } else if(mode == CURSOR_LOAD) {
1440                 term.c = c[alt];
1441                 tmoveto(c[alt].x, c[alt].y);
1442         }
1443 }
1444
1445 void
1446 treset(void) {
1447         uint i;
1448
1449         term.c = (TCursor){{
1450                 .mode = ATTR_NULL,
1451                 .fg = defaultfg,
1452                 .bg = defaultbg
1453         }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1454
1455         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1456         for(i = tabspaces; i < term.col; i += tabspaces)
1457                 term.tabs[i] = 1;
1458         term.top = 0;
1459         term.bot = term.row - 1;
1460         term.mode = MODE_WRAP;
1461         memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1462         term.charset = 0;
1463
1464         for(i = 0; i < 2; i++) {
1465                 tmoveto(0, 0);
1466                 tcursor(CURSOR_SAVE);
1467                 tclearregion(0, 0, term.col-1, term.row-1);
1468                 tswapscreen();
1469         }
1470 }
1471
1472 void
1473 tnew(int col, int row) {
1474         term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1475         tresize(col, row);
1476         term.numlock = 1;
1477
1478         treset();
1479 }
1480
1481 void
1482 tswapscreen(void) {
1483         Line *tmp = term.line;
1484
1485         term.line = term.alt;
1486         term.alt = tmp;
1487         term.mode ^= MODE_ALTSCREEN;
1488         tfulldirt();
1489 }
1490
1491 void
1492 tscrolldown(int orig, int n) {
1493         int i;
1494         Line temp;
1495
1496         LIMIT(n, 0, term.bot-orig+1);
1497
1498         tsetdirt(orig, term.bot-n);
1499         tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1500
1501         for(i = term.bot; i >= orig+n; i--) {
1502                 temp = term.line[i];
1503                 term.line[i] = term.line[i-n];
1504                 term.line[i-n] = temp;
1505         }
1506
1507         selscroll(orig, n);
1508 }
1509
1510 void
1511 tscrollup(int orig, int n) {
1512         int i;
1513         Line temp;
1514
1515         LIMIT(n, 0, term.bot-orig+1);
1516
1517         tclearregion(0, orig, term.col-1, orig+n-1);
1518         tsetdirt(orig+n, term.bot);
1519
1520         for(i = orig; i <= term.bot-n; i++) {
1521                 temp = term.line[i];
1522                 term.line[i] = term.line[i+n];
1523                 term.line[i+n] = temp;
1524         }
1525
1526         selscroll(orig, -n);
1527 }
1528
1529 void
1530 selscroll(int orig, int n) {
1531         if(sel.ob.x == -1)
1532                 return;
1533
1534         if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1535                 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1536                         selclear(NULL);
1537                         return;
1538                 }
1539                 if(sel.type == SEL_RECTANGULAR) {
1540                         if(sel.ob.y < term.top)
1541                                 sel.ob.y = term.top;
1542                         if(sel.oe.y > term.bot)
1543                                 sel.oe.y = term.bot;
1544                 } else {
1545                         if(sel.ob.y < term.top) {
1546                                 sel.ob.y = term.top;
1547                                 sel.ob.x = 0;
1548                         }
1549                         if(sel.oe.y > term.bot) {
1550                                 sel.oe.y = term.bot;
1551                                 sel.oe.x = term.col;
1552                         }
1553                 }
1554                 selnormalize();
1555         }
1556 }
1557
1558 void
1559 tnewline(int first_col) {
1560         int y = term.c.y;
1561
1562         if(y == term.bot) {
1563                 tscrollup(term.top, 1);
1564         } else {
1565                 y++;
1566         }
1567         tmoveto(first_col ? 0 : term.c.x, y);
1568 }
1569
1570 void
1571 csiparse(void) {
1572         char *p = csiescseq.buf, *np;
1573         long int v;
1574
1575         csiescseq.narg = 0;
1576         if(*p == '?') {
1577                 csiescseq.priv = 1;
1578                 p++;
1579         }
1580
1581         csiescseq.buf[csiescseq.len] = '\0';
1582         while(p < csiescseq.buf+csiescseq.len) {
1583                 np = NULL;
1584                 v = strtol(p, &np, 10);
1585                 if(np == p)
1586                         v = 0;
1587                 if(v == LONG_MAX || v == LONG_MIN)
1588                         v = -1;
1589                 csiescseq.arg[csiescseq.narg++] = v;
1590                 p = np;
1591                 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1592                         break;
1593                 p++;
1594         }
1595         csiescseq.mode[0] = *p++;
1596         csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1597 }
1598
1599 /* for absolute user moves, when decom is set */
1600 void
1601 tmoveato(int x, int y) {
1602         tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1603 }
1604
1605 void
1606 tmoveto(int x, int y) {
1607         int miny, maxy;
1608
1609         if(term.c.state & CURSOR_ORIGIN) {
1610                 miny = term.top;
1611                 maxy = term.bot;
1612         } else {
1613                 miny = 0;
1614                 maxy = term.row - 1;
1615         }
1616         term.c.state &= ~CURSOR_WRAPNEXT;
1617         term.c.x = LIMIT(x, 0, term.col-1);
1618         term.c.y = LIMIT(y, miny, maxy);
1619 }
1620
1621 void
1622 tsetchar(long u, Glyph *attr, int x, int y) {
1623         static char *vt100_0[62] = { /* 0x41 - 0x7e */
1624                 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1625                 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1626                 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1627                 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1628                 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1629                 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1630                 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1631                 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1632         };
1633
1634         /*
1635          * The table is proudly stolen from rxvt.
1636          */
1637         if(term.trantbl[term.charset] == CS_GRAPHIC0 &&
1638            BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
1639                 utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
1640
1641         if(term.line[y][x].mode & ATTR_WIDE) {
1642                 if(x+1 < term.col) {
1643                         term.line[y][x+1].u = ' ';
1644                         term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1645                 }
1646         } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1647                 term.line[y][x-1].u = ' ';
1648                 term.line[y][x-1].mode &= ~ATTR_WIDE;
1649         }
1650
1651         term.dirty[y] = 1;
1652         term.line[y][x] = *attr;
1653         term.line[y][x].u = u;
1654 }
1655
1656 void
1657 tclearregion(int x1, int y1, int x2, int y2) {
1658         int x, y, temp;
1659         Glyph *gp;
1660
1661         if(x1 > x2)
1662                 temp = x1, x1 = x2, x2 = temp;
1663         if(y1 > y2)
1664                 temp = y1, y1 = y2, y2 = temp;
1665
1666         LIMIT(x1, 0, term.col-1);
1667         LIMIT(x2, 0, term.col-1);
1668         LIMIT(y1, 0, term.row-1);
1669         LIMIT(y2, 0, term.row-1);
1670
1671         for(y = y1; y <= y2; y++) {
1672                 term.dirty[y] = 1;
1673                 for(x = x1; x <= x2; x++) {
1674                         gp = &term.line[y][x];
1675                         if(selected(x, y))
1676                                 selclear(NULL);
1677                         gp->fg = term.c.attr.fg;
1678                         gp->bg = term.c.attr.bg;
1679                         gp->mode = 0;
1680                         gp->u = ' ';
1681                 }
1682         }
1683 }
1684
1685 void
1686 tdeletechar(int n) {
1687         int dst, src, size;
1688         Glyph *line;
1689
1690         LIMIT(n, 0, term.col - term.c.x);
1691
1692         dst = term.c.x;
1693         src = term.c.x + n;
1694         size = term.col - src;
1695         line = term.line[term.c.y];
1696
1697         memmove(&line[dst], &line[src], size * sizeof(Glyph));
1698         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1699 }
1700
1701 void
1702 tinsertblank(int n) {
1703         int dst, src, size;
1704         Glyph *line;
1705
1706         LIMIT(n, 0, term.col - term.c.x);
1707
1708         dst = term.c.x + n;
1709         src = term.c.x;
1710         size = term.col - dst;
1711         line = term.line[term.c.y];
1712
1713         memmove(&line[dst], &line[src], size * sizeof(Glyph));
1714         tclearregion(src, term.c.y, dst - 1, term.c.y);
1715 }
1716
1717 void
1718 tinsertblankline(int n) {
1719         if(BETWEEN(term.c.y, term.top, term.bot))
1720                 tscrolldown(term.c.y, n);
1721 }
1722
1723 void
1724 tdeleteline(int n) {
1725         if(BETWEEN(term.c.y, term.top, term.bot))
1726                 tscrollup(term.c.y, n);
1727 }
1728
1729 int32_t
1730 tdefcolor(int *attr, int *npar, int l) {
1731         int32_t idx = -1;
1732         uint r, g, b;
1733
1734         switch (attr[*npar + 1]) {
1735         case 2: /* direct color in RGB space */
1736                 if (*npar + 4 >= l) {
1737                         fprintf(stderr,
1738                                 "erresc(38): Incorrect number of parameters (%d)\n",
1739                                 *npar);
1740                         break;
1741                 }
1742                 r = attr[*npar + 2];
1743                 g = attr[*npar + 3];
1744                 b = attr[*npar + 4];
1745                 *npar += 4;
1746                 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1747                         fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
1748                                 r, g, b);
1749                 else
1750                         idx = TRUECOLOR(r, g, b);
1751                 break;
1752         case 5: /* indexed color */
1753                 if (*npar + 2 >= l) {
1754                         fprintf(stderr,
1755                                 "erresc(38): Incorrect number of parameters (%d)\n",
1756                                 *npar);
1757                         break;
1758                 }
1759                 *npar += 2;
1760                 if(!BETWEEN(attr[*npar], 0, 255))
1761                         fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1762                 else
1763                         idx = attr[*npar];
1764                 break;
1765         case 0: /* implemented defined (only foreground) */
1766         case 1: /* transparent */
1767         case 3: /* direct color in CMY space */
1768         case 4: /* direct color in CMYK space */
1769         default:
1770                 fprintf(stderr,
1771                         "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1772                 break;
1773         }
1774
1775         return idx;
1776 }
1777
1778 void
1779 tsetattr(int *attr, int l) {
1780         int i;
1781         int32_t idx;
1782
1783         for(i = 0; i < l; i++) {
1784                 switch(attr[i]) {
1785                 case 0:
1786                         term.c.attr.mode &= ~(
1787                                 ATTR_BOLD       |
1788                                 ATTR_FAINT      |
1789                                 ATTR_ITALIC     |
1790                                 ATTR_UNDERLINE  |
1791                                 ATTR_BLINK      |
1792                                 ATTR_REVERSE    |
1793                                 ATTR_INVISIBLE  |
1794                                 ATTR_STRUCK     );
1795                         term.c.attr.fg = defaultfg;
1796                         term.c.attr.bg = defaultbg;
1797                         break;
1798                 case 1:
1799                         term.c.attr.mode |= ATTR_BOLD;
1800                         break;
1801                 case 2:
1802                         term.c.attr.mode |= ATTR_FAINT;
1803                         break;
1804                 case 3:
1805                         term.c.attr.mode |= ATTR_ITALIC;
1806                         break;
1807                 case 4:
1808                         term.c.attr.mode |= ATTR_UNDERLINE;
1809                         break;
1810                 case 5: /* slow blink */
1811                         /* FALLTHROUGH */
1812                 case 6: /* rapid blink */
1813                         term.c.attr.mode |= ATTR_BLINK;
1814                         break;
1815                 case 7:
1816                         term.c.attr.mode |= ATTR_REVERSE;
1817                         break;
1818                 case 8:
1819                         term.c.attr.mode |= ATTR_INVISIBLE;
1820                         break;
1821                 case 9:
1822                         term.c.attr.mode |= ATTR_STRUCK;
1823                         break;
1824                 case 22:
1825                         term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1826                         break;
1827                 case 23:
1828                         term.c.attr.mode &= ~ATTR_ITALIC;
1829                         break;
1830                 case 24:
1831                         term.c.attr.mode &= ~ATTR_UNDERLINE;
1832                         break;
1833                 case 25:
1834                         term.c.attr.mode &= ~ATTR_BLINK;
1835                         break;
1836                 case 27:
1837                         term.c.attr.mode &= ~ATTR_REVERSE;
1838                         break;
1839                 case 28:
1840                         term.c.attr.mode &= ~ATTR_INVISIBLE;
1841                         break;
1842                 case 29:
1843                         term.c.attr.mode &= ~ATTR_STRUCK;
1844                         break;
1845                 case 38:
1846                         if ((idx = tdefcolor(attr, &i, l)) >= 0)
1847                                 term.c.attr.fg = idx;
1848                         break;
1849                 case 39:
1850                         term.c.attr.fg = defaultfg;
1851                         break;
1852                 case 48:
1853                         if ((idx = tdefcolor(attr, &i, l)) >= 0)
1854                                 term.c.attr.bg = idx;
1855                         break;
1856                 case 49:
1857                         term.c.attr.bg = defaultbg;
1858                         break;
1859                 default:
1860                         if(BETWEEN(attr[i], 30, 37)) {
1861                                 term.c.attr.fg = attr[i] - 30;
1862                         } else if(BETWEEN(attr[i], 40, 47)) {
1863                                 term.c.attr.bg = attr[i] - 40;
1864                         } else if(BETWEEN(attr[i], 90, 97)) {
1865                                 term.c.attr.fg = attr[i] - 90 + 8;
1866                         } else if(BETWEEN(attr[i], 100, 107)) {
1867                                 term.c.attr.bg = attr[i] - 100 + 8;
1868                         } else {
1869                                 fprintf(stderr,
1870                                         "erresc(default): gfx attr %d unknown\n",
1871                                         attr[i]), csidump();
1872                         }
1873                         break;
1874                 }
1875         }
1876 }
1877
1878 void
1879 tsetscroll(int t, int b) {
1880         int temp;
1881
1882         LIMIT(t, 0, term.row-1);
1883         LIMIT(b, 0, term.row-1);
1884         if(t > b) {
1885                 temp = t;
1886                 t = b;
1887                 b = temp;
1888         }
1889         term.top = t;
1890         term.bot = b;
1891 }
1892
1893 void
1894 tsetmode(bool priv, bool set, int *args, int narg) {
1895         int *lim, mode;
1896         bool alt;
1897
1898         for(lim = args + narg; args < lim; ++args) {
1899                 if(priv) {
1900                         switch(*args) {
1901                         case 1: /* DECCKM -- Cursor key */
1902                                 MODBIT(term.mode, set, MODE_APPCURSOR);
1903                                 break;
1904                         case 5: /* DECSCNM -- Reverse video */
1905                                 mode = term.mode;
1906                                 MODBIT(term.mode, set, MODE_REVERSE);
1907                                 if(mode != term.mode)
1908                                         redraw();
1909                                 break;
1910                         case 6: /* DECOM -- Origin */
1911                                 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1912                                 tmoveato(0, 0);
1913                                 break;
1914                         case 7: /* DECAWM -- Auto wrap */
1915                                 MODBIT(term.mode, set, MODE_WRAP);
1916                                 break;
1917                         case 0:  /* Error (IGNORED) */
1918                         case 2:  /* DECANM -- ANSI/VT52 (IGNORED) */
1919                         case 3:  /* DECCOLM -- Column  (IGNORED) */
1920                         case 4:  /* DECSCLM -- Scroll (IGNORED) */
1921                         case 8:  /* DECARM -- Auto repeat (IGNORED) */
1922                         case 18: /* DECPFF -- Printer feed (IGNORED) */
1923                         case 19: /* DECPEX -- Printer extent (IGNORED) */
1924                         case 42: /* DECNRCM -- National characters (IGNORED) */
1925                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
1926                                 break;
1927                         case 25: /* DECTCEM -- Text Cursor Enable Mode */
1928                                 MODBIT(term.mode, !set, MODE_HIDE);
1929                                 break;
1930                         case 9:    /* X10 mouse compatibility mode */
1931                                 xsetpointermotion(0);
1932                                 MODBIT(term.mode, 0, MODE_MOUSE);
1933                                 MODBIT(term.mode, set, MODE_MOUSEX10);
1934                                 break;
1935                         case 1000: /* 1000: report button press */
1936                                 xsetpointermotion(0);
1937                                 MODBIT(term.mode, 0, MODE_MOUSE);
1938                                 MODBIT(term.mode, set, MODE_MOUSEBTN);
1939                                 break;
1940                         case 1002: /* 1002: report motion on button press */
1941                                 xsetpointermotion(0);
1942                                 MODBIT(term.mode, 0, MODE_MOUSE);
1943                                 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1944                                 break;
1945                         case 1003: /* 1003: enable all mouse motions */
1946                                 xsetpointermotion(set);
1947                                 MODBIT(term.mode, 0, MODE_MOUSE);
1948                                 MODBIT(term.mode, set, MODE_MOUSEMANY);
1949                                 break;
1950                         case 1004: /* 1004: send focus events to tty */
1951                                 MODBIT(term.mode, set, MODE_FOCUS);
1952                                 break;
1953                         case 1006: /* 1006: extended reporting mode */
1954                                 MODBIT(term.mode, set, MODE_MOUSESGR);
1955                                 break;
1956                         case 1034:
1957                                 MODBIT(term.mode, set, MODE_8BIT);
1958                                 break;
1959                         case 1049: /* swap screen & set/restore cursor as xterm */
1960                                 if (!allowaltscreen)
1961                                         break;
1962                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1963                                 /* FALLTHROUGH */
1964                         case 47: /* swap screen */
1965                         case 1047:
1966                                 if (!allowaltscreen)
1967                                         break;
1968                                 alt = IS_SET(MODE_ALTSCREEN);
1969                                 if(alt) {
1970                                         tclearregion(0, 0, term.col-1,
1971                                                         term.row-1);
1972                                 }
1973                                 if(set ^ alt) /* set is always 1 or 0 */
1974                                         tswapscreen();
1975                                 if(*args != 1049)
1976                                         break;
1977                                 /* FALLTHROUGH */
1978                         case 1048:
1979                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1980                                 break;
1981                         case 2004: /* 2004: bracketed paste mode */
1982                                 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1983                                 break;
1984                         /* Not implemented mouse modes. See comments there. */
1985                         case 1001: /* mouse highlight mode; can hang the
1986                                       terminal by design when implemented. */
1987                         case 1005: /* UTF-8 mouse mode; will confuse
1988                                       applications not supporting UTF-8
1989                                       and luit. */
1990                         case 1015: /* urxvt mangled mouse mode; incompatible
1991                                       and can be mistaken for other control
1992                                       codes. */
1993                         default:
1994                                 fprintf(stderr,
1995                                         "erresc: unknown private set/reset mode %d\n",
1996                                         *args);
1997                                 break;
1998                         }
1999                 } else {
2000                         switch(*args) {
2001                         case 0:  /* Error (IGNORED) */
2002                                 break;
2003                         case 2:  /* KAM -- keyboard action */
2004                                 MODBIT(term.mode, set, MODE_KBDLOCK);
2005                                 break;
2006                         case 4:  /* IRM -- Insertion-replacement */
2007                                 MODBIT(term.mode, set, MODE_INSERT);
2008                                 break;
2009                         case 12: /* SRM -- Send/Receive */
2010                                 MODBIT(term.mode, !set, MODE_ECHO);
2011                                 break;
2012                         case 20: /* LNM -- Linefeed/new line */
2013                                 MODBIT(term.mode, set, MODE_CRLF);
2014                                 break;
2015                         default:
2016                                 fprintf(stderr,
2017                                         "erresc: unknown set/reset mode %d\n",
2018                                         *args);
2019                                 break;
2020                         }
2021                 }
2022         }
2023 }
2024
2025 void
2026 csihandle(void) {
2027         char buf[40];
2028         int len;
2029
2030         switch(csiescseq.mode[0]) {
2031         default:
2032         unknown:
2033                 fprintf(stderr, "erresc: unknown csi ");
2034                 csidump();
2035                 /* die(""); */
2036                 break;
2037         case '@': /* ICH -- Insert <n> blank char */
2038                 DEFAULT(csiescseq.arg[0], 1);
2039                 tinsertblank(csiescseq.arg[0]);
2040                 break;
2041         case 'A': /* CUU -- Cursor <n> Up */
2042                 DEFAULT(csiescseq.arg[0], 1);
2043                 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2044                 break;
2045         case 'B': /* CUD -- Cursor <n> Down */
2046         case 'e': /* VPR --Cursor <n> Down */
2047                 DEFAULT(csiescseq.arg[0], 1);
2048                 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2049                 break;
2050         case 'i': /* MC -- Media Copy */
2051                 switch(csiescseq.arg[0]) {
2052                 case 0:
2053                         tdump();
2054                         break;
2055                 case 1:
2056                         tdumpline(term.c.y);
2057                         break;
2058                 case 2:
2059                         tdumpsel();
2060                         break;
2061                 case 4:
2062                         term.mode &= ~MODE_PRINT;
2063                         break;
2064                 case 5:
2065                         term.mode |= MODE_PRINT;
2066                         break;
2067                 }
2068                 break;
2069         case 'c': /* DA -- Device Attributes */
2070                 if(csiescseq.arg[0] == 0)
2071                         ttywrite(vtiden, sizeof(vtiden) - 1);
2072                 break;
2073         case 'C': /* CUF -- Cursor <n> Forward */
2074         case 'a': /* HPR -- Cursor <n> Forward */
2075                 DEFAULT(csiescseq.arg[0], 1);
2076                 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2077                 break;
2078         case 'D': /* CUB -- Cursor <n> Backward */
2079                 DEFAULT(csiescseq.arg[0], 1);
2080                 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2081                 break;
2082         case 'E': /* CNL -- Cursor <n> Down and first col */
2083                 DEFAULT(csiescseq.arg[0], 1);
2084                 tmoveto(0, term.c.y+csiescseq.arg[0]);
2085                 break;
2086         case 'F': /* CPL -- Cursor <n> Up and first col */
2087                 DEFAULT(csiescseq.arg[0], 1);
2088                 tmoveto(0, term.c.y-csiescseq.arg[0]);
2089                 break;
2090         case 'g': /* TBC -- Tabulation clear */
2091                 switch(csiescseq.arg[0]) {
2092                 case 0: /* clear current tab stop */
2093                         term.tabs[term.c.x] = 0;
2094                         break;
2095                 case 3: /* clear all the tabs */
2096                         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2097                         break;
2098                 default:
2099                         goto unknown;
2100                 }
2101                 break;
2102         case 'G': /* CHA -- Move to <col> */
2103         case '`': /* HPA */
2104                 DEFAULT(csiescseq.arg[0], 1);
2105                 tmoveto(csiescseq.arg[0]-1, term.c.y);
2106                 break;
2107         case 'H': /* CUP -- Move to <row> <col> */
2108         case 'f': /* HVP */
2109                 DEFAULT(csiescseq.arg[0], 1);
2110                 DEFAULT(csiescseq.arg[1], 1);
2111                 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2112                 break;
2113         case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2114                 DEFAULT(csiescseq.arg[0], 1);
2115                 tputtab(csiescseq.arg[0]);
2116                 break;
2117         case 'J': /* ED -- Clear screen */
2118                 selclear(NULL);
2119                 switch(csiescseq.arg[0]) {
2120                 case 0: /* below */
2121                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2122                         if(term.c.y < term.row-1) {
2123                                 tclearregion(0, term.c.y+1, term.col-1,
2124                                                 term.row-1);
2125                         }
2126                         break;
2127                 case 1: /* above */
2128                         if(term.c.y > 1)
2129                                 tclearregion(0, 0, term.col-1, term.c.y-1);
2130                         tclearregion(0, term.c.y, term.c.x, term.c.y);
2131                         break;
2132                 case 2: /* all */
2133                         tclearregion(0, 0, term.col-1, term.row-1);
2134                         break;
2135                 default:
2136                         goto unknown;
2137                 }
2138                 break;
2139         case 'K': /* EL -- Clear line */
2140                 switch(csiescseq.arg[0]) {
2141                 case 0: /* right */
2142                         tclearregion(term.c.x, term.c.y, term.col-1,
2143                                         term.c.y);
2144                         break;
2145                 case 1: /* left */
2146                         tclearregion(0, term.c.y, term.c.x, term.c.y);
2147                         break;
2148                 case 2: /* all */
2149                         tclearregion(0, term.c.y, term.col-1, term.c.y);
2150                         break;
2151                 }
2152                 break;
2153         case 'S': /* SU -- Scroll <n> line up */
2154                 DEFAULT(csiescseq.arg[0], 1);
2155                 tscrollup(term.top, csiescseq.arg[0]);
2156                 break;
2157         case 'T': /* SD -- Scroll <n> line down */
2158                 DEFAULT(csiescseq.arg[0], 1);
2159                 tscrolldown(term.top, csiescseq.arg[0]);
2160                 break;
2161         case 'L': /* IL -- Insert <n> blank lines */
2162                 DEFAULT(csiescseq.arg[0], 1);
2163                 tinsertblankline(csiescseq.arg[0]);
2164                 break;
2165         case 'l': /* RM -- Reset Mode */
2166                 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2167                 break;
2168         case 'M': /* DL -- Delete <n> lines */
2169                 DEFAULT(csiescseq.arg[0], 1);
2170                 tdeleteline(csiescseq.arg[0]);
2171                 break;
2172         case 'X': /* ECH -- Erase <n> char */
2173                 DEFAULT(csiescseq.arg[0], 1);
2174                 tclearregion(term.c.x, term.c.y,
2175                                 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2176                 break;
2177         case 'P': /* DCH -- Delete <n> char */
2178                 DEFAULT(csiescseq.arg[0], 1);
2179                 tdeletechar(csiescseq.arg[0]);
2180                 break;
2181         case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2182                 DEFAULT(csiescseq.arg[0], 1);
2183                 tputtab(-csiescseq.arg[0]);
2184                 break;
2185         case 'd': /* VPA -- Move to <row> */
2186                 DEFAULT(csiescseq.arg[0], 1);
2187                 tmoveato(term.c.x, csiescseq.arg[0]-1);
2188                 break;
2189         case 'h': /* SM -- Set terminal mode */
2190                 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2191                 break;
2192         case 'm': /* SGR -- Terminal attribute (color) */
2193                 tsetattr(csiescseq.arg, csiescseq.narg);
2194                 break;
2195         case 'n': /* DSR – Device Status Report (cursor position) */
2196                 if (csiescseq.arg[0] == 6) {
2197                         len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2198                                         term.c.y+1, term.c.x+1);
2199                         ttywrite(buf, len);
2200                 }
2201                 break;
2202         case 'r': /* DECSTBM -- Set Scrolling Region */
2203                 if(csiescseq.priv) {
2204                         goto unknown;
2205                 } else {
2206                         DEFAULT(csiescseq.arg[0], 1);
2207                         DEFAULT(csiescseq.arg[1], term.row);
2208                         tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2209                         tmoveato(0, 0);
2210                 }
2211                 break;
2212         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2213                 tcursor(CURSOR_SAVE);
2214                 break;
2215         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2216                 tcursor(CURSOR_LOAD);
2217                 break;
2218         case ' ':
2219                 switch (csiescseq.mode[1]) {
2220                         case 'q': /* DECSCUSR -- Set Cursor Style */
2221                                 DEFAULT(csiescseq.arg[0], 1);
2222                                 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2223                                         goto unknown;
2224                                 }
2225                                 xw.cursor = csiescseq.arg[0];
2226                                 break;
2227                         default:
2228                                 goto unknown;
2229                 }
2230                 break;
2231         }
2232 }
2233
2234 void
2235 csidump(void) {
2236         int i;
2237         uint c;
2238
2239         printf("ESC[");
2240         for(i = 0; i < csiescseq.len; i++) {
2241                 c = csiescseq.buf[i] & 0xff;
2242                 if(isprint(c)) {
2243                         putchar(c);
2244                 } else if(c == '\n') {
2245                         printf("(\\n)");
2246                 } else if(c == '\r') {
2247                         printf("(\\r)");
2248                 } else if(c == 0x1b) {
2249                         printf("(\\e)");
2250                 } else {
2251                         printf("(%02x)", c);
2252                 }
2253         }
2254         putchar('\n');
2255 }
2256
2257 void
2258 csireset(void) {
2259         memset(&csiescseq, 0, sizeof(csiescseq));
2260 }
2261
2262 void
2263 strhandle(void) {
2264         char *p = NULL;
2265         int j, narg, par;
2266
2267         term.esc &= ~(ESC_STR_END|ESC_STR);
2268         strparse();
2269         par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2270
2271         switch(strescseq.type) {
2272         case ']': /* OSC -- Operating System Command */
2273                 switch(par) {
2274                 case 0:
2275                 case 1:
2276                 case 2:
2277                         if(narg > 1)
2278                                 xsettitle(strescseq.args[1]);
2279                         return;
2280                 case 4: /* color set */
2281                         if(narg < 3)
2282                                 break;
2283                         p = strescseq.args[2];
2284                         /* FALLTHROUGH */
2285                 case 104: /* color reset, here p = NULL */
2286                         j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2287                         if(xsetcolorname(j, p)) {
2288                                 fprintf(stderr, "erresc: invalid color %s\n", p);
2289                         } else {
2290                                 /*
2291                                  * TODO if defaultbg color is changed, borders
2292                                  * are dirty
2293                                  */
2294                                 redraw();
2295                         }
2296                         return;
2297                 }
2298                 break;
2299         case 'k': /* old title set compatibility */
2300                 xsettitle(strescseq.args[0]);
2301                 return;
2302         case 'P': /* DCS -- Device Control String */
2303         case '_': /* APC -- Application Program Command */
2304         case '^': /* PM -- Privacy Message */
2305                 return;
2306         }
2307
2308         fprintf(stderr, "erresc: unknown str ");
2309         strdump();
2310 }
2311
2312 void
2313 strparse(void) {
2314         int c;
2315         char *p = strescseq.buf;
2316
2317         strescseq.narg = 0;
2318         strescseq.buf[strescseq.len] = '\0';
2319
2320         if(*p == '\0')
2321                 return;
2322
2323         while(strescseq.narg < STR_ARG_SIZ) {
2324                 strescseq.args[strescseq.narg++] = p;
2325                 while((c = *p) != ';' && c != '\0')
2326                         ++p;
2327                 if(c == '\0')
2328                         return;
2329                 *p++ = '\0';
2330         }
2331 }
2332
2333 void
2334 strdump(void) {
2335         int i;
2336         uint c;
2337
2338         printf("ESC%c", strescseq.type);
2339         for(i = 0; i < strescseq.len; i++) {
2340                 c = strescseq.buf[i] & 0xff;
2341                 if(c == '\0') {
2342                         return;
2343                 } else if(isprint(c)) {
2344                         putchar(c);
2345                 } else if(c == '\n') {
2346                         printf("(\\n)");
2347                 } else if(c == '\r') {
2348                         printf("(\\r)");
2349                 } else if(c == 0x1b) {
2350                         printf("(\\e)");
2351                 } else {
2352                         printf("(%02x)", c);
2353                 }
2354         }
2355         printf("ESC\\\n");
2356 }
2357
2358 void
2359 strreset(void) {
2360         memset(&strescseq, 0, sizeof(strescseq));
2361 }
2362
2363 void
2364 tprinter(char *s, size_t len) {
2365         if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2366                 fprintf(stderr, "Error writing in %s:%s\n",
2367                         opt_io, strerror(errno));
2368                 close(iofd);
2369                 iofd = -1;
2370         }
2371 }
2372
2373 void
2374 toggleprinter(const Arg *arg) {
2375         term.mode ^= MODE_PRINT;
2376 }
2377
2378 void
2379 printscreen(const Arg *arg) {
2380         tdump();
2381 }
2382
2383 void
2384 printsel(const Arg *arg) {
2385         tdumpsel();
2386 }
2387
2388 void
2389 tdumpsel(void) {
2390         char *ptr;
2391
2392         if((ptr = getsel())) {
2393                 tprinter(ptr, strlen(ptr));
2394                 free(ptr);
2395         }
2396 }
2397
2398 void
2399 tdumpline(int n) {
2400         char buf[UTF_SIZ];
2401         Glyph *bp, *end;
2402
2403         bp = &term.line[n][0];
2404         end = &bp[MIN(tlinelen(n), term.col) - 1];
2405         if(bp != end || bp->u != ' ') {
2406                 for( ;bp <= end; ++bp)
2407                         tprinter(buf, utf8encode(bp->u, buf));
2408         }
2409         tprinter("\n", 1);
2410 }
2411
2412 void
2413 tdump(void) {
2414         int i;
2415
2416         for(i = 0; i < term.row; ++i)
2417                 tdumpline(i);
2418 }
2419
2420 void
2421 tputtab(int n) {
2422         uint x = term.c.x;
2423
2424         if(n > 0) {
2425                 while(x < term.col && n--)
2426                         for(++x; x < term.col && !term.tabs[x]; ++x)
2427                                 /* nothing */ ;
2428         } else if(n < 0) {
2429                 while(x > 0 && n++)
2430                         for(--x; x > 0 && !term.tabs[x]; --x)
2431                                 /* nothing */ ;
2432         }
2433         term.c.x = LIMIT(x, 0, term.col-1);
2434 }
2435
2436 void
2437 techo(long u) {
2438         if(ISCONTROL(u)) { /* control code */
2439                 if(u & 0x80) {
2440                         u &= 0x7f;
2441                         tputc('^');
2442                         tputc('[');
2443                 } else if(u != '\n' && u != '\r' && u != '\t') {
2444                         u ^= 0x40;
2445                         tputc('^');
2446                 }
2447         }
2448         tputc(u);
2449 }
2450
2451 void
2452 tdeftran(char ascii) {
2453         static char cs[] = "0B";
2454         static int vcs[] = {CS_GRAPHIC0, CS_USA};
2455         char *p;
2456
2457         if((p = strchr(cs, ascii)) == NULL) {
2458                 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2459         } else {
2460                 term.trantbl[term.icharset] = vcs[p - cs];
2461         }
2462 }
2463
2464 void
2465 tdectest(char c) {
2466         int x, y;
2467
2468         if(c == '8') { /* DEC screen alignment test. */
2469                 for(x = 0; x < term.col; ++x) {
2470                         for(y = 0; y < term.row; ++y)
2471                                 tsetchar('E', &term.c.attr, x, y);
2472                 }
2473         }
2474 }
2475
2476 void
2477 tstrsequence(uchar c) {
2478         switch (c) {
2479         case 0x90:   /* DCS -- Device Control String */
2480                 c = 'P';
2481                 break;
2482         case 0x9f:   /* APC -- Application Program Command */
2483                 c = '_';
2484                 break;
2485         case 0x9e:   /* PM -- Privacy Message */
2486                 c = '^';
2487                 break;
2488         case 0x9d:   /* OSC -- Operating System Command */
2489                 c = ']';
2490                 break;
2491         }
2492         strreset();
2493         strescseq.type = c;
2494         term.esc |= ESC_STR;
2495 }
2496
2497 void
2498 tcontrolcode(uchar ascii) {
2499         switch(ascii) {
2500         case '\t':   /* HT */
2501                 tputtab(1);
2502                 return;
2503         case '\b':   /* BS */
2504                 tmoveto(term.c.x-1, term.c.y);
2505                 return;
2506         case '\r':   /* CR */
2507                 tmoveto(0, term.c.y);
2508                 return;
2509         case '\f':   /* LF */
2510         case '\v':   /* VT */
2511         case '\n':   /* LF */
2512                 /* go to first col if the mode is set */
2513                 tnewline(IS_SET(MODE_CRLF));
2514                 return;
2515         case '\a':   /* BEL */
2516                 if(term.esc & ESC_STR_END) {
2517                         /* backwards compatibility to xterm */
2518                         strhandle();
2519                 } else {
2520                         if(!(xw.state & WIN_FOCUSED))
2521                                 xseturgency(1);
2522                         if (bellvolume)
2523                                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2524                 }
2525                 break;
2526         case '\033': /* ESC */
2527                 csireset();
2528                 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2529                 term.esc |= ESC_START;
2530                 return;
2531         case '\016': /* SO (LS1 -- Locking shift 1) */
2532         case '\017': /* SI (LS0 -- Locking shift 0) */
2533                 term.charset = 1 - (ascii - '\016');
2534                 return;
2535         case '\032': /* SUB */
2536                 tsetchar('?', &term.c.attr, term.c.x, term.c.y);
2537         case '\030': /* CAN */
2538                 csireset();
2539                 break;
2540         case '\005': /* ENQ (IGNORED) */
2541         case '\000': /* NUL (IGNORED) */
2542         case '\021': /* XON (IGNORED) */
2543         case '\023': /* XOFF (IGNORED) */
2544         case 0177:   /* DEL (IGNORED) */
2545                 return;
2546         case 0x84:   /* TODO: IND */
2547                 break;
2548         case 0x85:   /* NEL -- Next line */
2549                 tnewline(1); /* always go to first col */
2550                 break;
2551         case 0x88:   /* HTS -- Horizontal tab stop */
2552                 term.tabs[term.c.x] = 1;
2553                 break;
2554         case 0x8d:   /* TODO: RI */
2555         case 0x8e:   /* TODO: SS2 */
2556         case 0x8f:   /* TODO: SS3 */
2557         case 0x98:   /* TODO: SOS */
2558                 break;
2559         case 0x9a:   /* DECID -- Identify Terminal */
2560                 ttywrite(vtiden, sizeof(vtiden) - 1);
2561                 break;
2562         case 0x9b:   /* TODO: CSI */
2563         case 0x9c:   /* TODO: ST */
2564                 break;
2565         case 0x90:   /* DCS -- Device Control String */
2566         case 0x9f:   /* APC -- Application Program Command */
2567         case 0x9e:   /* PM -- Privacy Message */
2568         case 0x9d:   /* OSC -- Operating System Command */
2569                 tstrsequence(ascii);
2570                 return;
2571         }
2572         /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2573         term.esc &= ~(ESC_STR_END|ESC_STR);
2574 }
2575
2576 /*
2577  * returns 1 when the sequence is finished and it hasn't to read
2578  * more characters for this sequence, otherwise 0
2579  */
2580 int
2581 eschandle(uchar ascii) {
2582         switch(ascii) {
2583         case '[':
2584                 term.esc |= ESC_CSI;
2585                 return 0;
2586         case '#':
2587                 term.esc |= ESC_TEST;
2588                 return 0;
2589         case 'P': /* DCS -- Device Control String */
2590         case '_': /* APC -- Application Program Command */
2591         case '^': /* PM -- Privacy Message */
2592         case ']': /* OSC -- Operating System Command */
2593         case 'k': /* old title set compatibility */
2594                 tstrsequence(ascii);
2595                 return 0;
2596         case 'n': /* LS2 -- Locking shift 2 */
2597         case 'o': /* LS3 -- Locking shift 3 */
2598                 term.charset = 2 + (ascii - 'n');
2599                 break;
2600         case '(': /* GZD4 -- set primary charset G0 */
2601         case ')': /* G1D4 -- set secondary charset G1 */
2602         case '*': /* G2D4 -- set tertiary charset G2 */
2603         case '+': /* G3D4 -- set quaternary charset G3 */
2604                 term.icharset = ascii - '(';
2605                 term.esc |= ESC_ALTCHARSET;
2606                 return 0;
2607         case 'D': /* IND -- Linefeed */
2608                 if(term.c.y == term.bot) {
2609                         tscrollup(term.top, 1);
2610                 } else {
2611                         tmoveto(term.c.x, term.c.y+1);
2612                 }
2613                 break;
2614         case 'E': /* NEL -- Next line */
2615                 tnewline(1); /* always go to first col */
2616                 break;
2617         case 'H': /* HTS -- Horizontal tab stop */
2618                 term.tabs[term.c.x] = 1;
2619                 break;
2620         case 'M': /* RI -- Reverse index */
2621                 if(term.c.y == term.top) {
2622                         tscrolldown(term.top, 1);
2623                 } else {
2624                         tmoveto(term.c.x, term.c.y-1);
2625                 }
2626                 break;
2627         case 'Z': /* DECID -- Identify Terminal */
2628                 ttywrite(vtiden, sizeof(vtiden) - 1);
2629                 break;
2630         case 'c': /* RIS -- Reset to inital state */
2631                 treset();
2632                 xresettitle();
2633                 xloadcols();
2634                 break;
2635         case '=': /* DECPAM -- Application keypad */
2636                 term.mode |= MODE_APPKEYPAD;
2637                 break;
2638         case '>': /* DECPNM -- Normal keypad */
2639                 term.mode &= ~MODE_APPKEYPAD;
2640                 break;
2641         case '7': /* DECSC -- Save Cursor */
2642                 tcursor(CURSOR_SAVE);
2643                 break;
2644         case '8': /* DECRC -- Restore Cursor */
2645                 tcursor(CURSOR_LOAD);
2646                 break;
2647         case '\\': /* ST -- String Terminator */
2648                 if(term.esc & ESC_STR_END)
2649                         strhandle();
2650                 break;
2651         default:
2652                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2653                         (uchar) ascii, isprint(ascii)? ascii:'.');
2654                 break;
2655         }
2656         return 1;
2657 }
2658
2659 void
2660 tputc(long u) {
2661         char c[UTF_SIZ];
2662         bool control;
2663         int width, len;
2664         Glyph *gp;
2665
2666         len = utf8encode(u, c);
2667         if((width = wcwidth(u)) == -1) {
2668                 memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
2669                 width = 1;
2670         }
2671
2672         if(IS_SET(MODE_PRINT))
2673                 tprinter(c, len);
2674         control = ISCONTROL(u);
2675
2676         /*
2677          * STR sequence must be checked before anything else
2678          * because it uses all following characters until it
2679          * receives a ESC, a SUB, a ST or any other C1 control
2680          * character.
2681          */
2682         if(term.esc & ESC_STR) {
2683                 if(u == '\a' || u == 030 || u == 032 || u == 033 ||
2684                    ISCONTROLC1(u)) {
2685                         term.esc &= ~(ESC_START|ESC_STR);
2686                         term.esc |= ESC_STR_END;
2687                 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2688                         memmove(&strescseq.buf[strescseq.len], c, len);
2689                         strescseq.len += len;
2690                         return;
2691                 } else {
2692                 /*
2693                  * Here is a bug in terminals. If the user never sends
2694                  * some code to stop the str or esc command, then st
2695                  * will stop responding. But this is better than
2696                  * silently failing with unknown characters. At least
2697                  * then users will report back.
2698                  *
2699                  * In the case users ever get fixed, here is the code:
2700                  */
2701                 /*
2702                  * term.esc = 0;
2703                  * strhandle();
2704                  */
2705                         return;
2706                 }
2707         }
2708
2709         /*
2710          * Actions of control codes must be performed as soon they arrive
2711          * because they can be embedded inside a control sequence, and
2712          * they must not cause conflicts with sequences.
2713          */
2714         if(control) {
2715                 tcontrolcode(u);
2716                 /*
2717                  * control codes are not shown ever
2718                  */
2719                 return;
2720         } else if(term.esc & ESC_START) {
2721                 if(term.esc & ESC_CSI) {
2722                         csiescseq.buf[csiescseq.len++] = u;
2723                         if(BETWEEN(u, 0x40, 0x7E)
2724                                         || csiescseq.len >= \
2725                                         sizeof(csiescseq.buf)-1) {
2726                                 term.esc = 0;
2727                                 csiparse();
2728                                 csihandle();
2729                         }
2730                         return;
2731                 } else if(term.esc & ESC_ALTCHARSET) {
2732                         tdeftran(u);
2733                 } else if(term.esc & ESC_TEST) {
2734                         tdectest(u);
2735                 } else {
2736                         if (!eschandle(u))
2737                                 return;
2738                         /* sequence already finished */
2739                 }
2740                 term.esc = 0;
2741                 /*
2742                  * All characters which form part of a sequence are not
2743                  * printed
2744                  */
2745                 return;
2746         }
2747         if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2748                 selclear(NULL);
2749
2750         gp = &term.line[term.c.y][term.c.x];
2751         if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2752                 gp->mode |= ATTR_WRAP;
2753                 tnewline(1);
2754                 gp = &term.line[term.c.y][term.c.x];
2755         }
2756
2757         if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2758                 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2759
2760         if(term.c.x+width > term.col) {
2761                 tnewline(1);
2762                 gp = &term.line[term.c.y][term.c.x];
2763         }
2764
2765         tsetchar(u, &term.c.attr, term.c.x, term.c.y);
2766
2767         if(width == 2) {
2768                 gp->mode |= ATTR_WIDE;
2769                 if(term.c.x+1 < term.col) {
2770                         gp[1].u = '\0';
2771                         gp[1].mode = ATTR_WDUMMY;
2772                 }
2773         }
2774         if(term.c.x+width < term.col) {
2775                 tmoveto(term.c.x+width, term.c.y);
2776         } else {
2777                 term.c.state |= CURSOR_WRAPNEXT;
2778         }
2779 }
2780
2781 void
2782 tresize(int col, int row) {
2783         int i;
2784         int minrow = MIN(row, term.row);
2785         int mincol = MIN(col, term.col);
2786         bool *bp;
2787         TCursor c;
2788
2789         if(col < 1 || row < 1) {
2790                 fprintf(stderr,
2791                         "tresize: error resizing to %dx%d\n", col, row);
2792                 return;
2793         }
2794
2795         /*
2796          * slide screen to keep cursor where we expect it -
2797          * tscrollup would work here, but we can optimize to
2798          * memmove because we're freeing the earlier lines
2799          */
2800         for(i = 0; i <= term.c.y - row; i++) {
2801                 free(term.line[i]);
2802                 free(term.alt[i]);
2803         }
2804         /* ensure that both src and dst are not NULL */
2805         if (i > 0) {
2806                 memmove(term.line, term.line + i, row * sizeof(Line));
2807                 memmove(term.alt, term.alt + i, row * sizeof(Line));
2808         }
2809         for(i += row; i < term.row; i++) {
2810                 free(term.line[i]);
2811                 free(term.alt[i]);
2812         }
2813
2814         /* resize to new height */
2815         term.line = xrealloc(term.line, row * sizeof(Line));
2816         term.alt  = xrealloc(term.alt,  row * sizeof(Line));
2817         term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2818         term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2819
2820         /* resize each row to new width, zero-pad if needed */
2821         for(i = 0; i < minrow; i++) {
2822                 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2823                 term.alt[i]  = xrealloc(term.alt[i],  col * sizeof(Glyph));
2824         }
2825
2826         /* allocate any new rows */
2827         for(/* i == minrow */; i < row; i++) {
2828                 term.line[i] = xmalloc(col * sizeof(Glyph));
2829                 term.alt[i] = xmalloc(col * sizeof(Glyph));
2830         }
2831         if(col > term.col) {
2832                 bp = term.tabs + term.col;
2833
2834                 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2835                 while(--bp > term.tabs && !*bp)
2836                         /* nothing */ ;
2837                 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2838                         *bp = 1;
2839         }
2840         /* update terminal size */
2841         term.col = col;
2842         term.row = row;
2843         /* reset scrolling region */
2844         tsetscroll(0, row-1);
2845         /* make use of the LIMIT in tmoveto */
2846         tmoveto(term.c.x, term.c.y);
2847         /* Clearing both screens (it makes dirty all lines) */
2848         c = term.c;
2849         for(i = 0; i < 2; i++) {
2850                 if(mincol < col && 0 < minrow) {
2851                         tclearregion(mincol, 0, col - 1, minrow - 1);
2852                 }
2853                 if(0 < col && minrow < row) {
2854                         tclearregion(0, minrow, col - 1, row - 1);
2855                 }
2856                 tswapscreen();
2857                 tcursor(CURSOR_LOAD);
2858         }
2859         term.c = c;
2860 }
2861
2862 void
2863 xresize(int col, int row) {
2864         xw.tw = MAX(1, col * xw.cw);
2865         xw.th = MAX(1, row * xw.ch);
2866
2867         XFreePixmap(xw.dpy, xw.buf);
2868         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2869                         DefaultDepth(xw.dpy, xw.scr));
2870         XftDrawChange(xw.draw, xw.buf);
2871         xclear(0, 0, xw.w, xw.h);
2872 }
2873
2874 ushort
2875 sixd_to_16bit(int x) {
2876         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2877 }
2878
2879 bool
2880 xloadcolor(int i, const char *name, Color *ncolor) {
2881         XRenderColor color = { .alpha = 0xffff };
2882
2883         if(!name) {
2884                 if(BETWEEN(i, 16, 255)) { /* 256 color */
2885                         if(i < 6*6*6+16) { /* same colors as xterm */
2886                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
2887                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2888                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
2889                         } else { /* greyscale */
2890                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
2891                                 color.green = color.blue = color.red;
2892                         }
2893                         return XftColorAllocValue(xw.dpy, xw.vis,
2894                                                   xw.cmap, &color, ncolor);
2895                 } else
2896                         name = colorname[i];
2897         }
2898         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
2899 }
2900
2901 void
2902 xloadcols(void) {
2903         int i;
2904         static bool loaded;
2905         Color *cp;
2906
2907         if(loaded) {
2908                 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
2909                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2910         }
2911
2912         for(i = 0; i < LEN(dc.col); i++)
2913                 if(!xloadcolor(i, NULL, &dc.col[i])) {
2914                         if(colorname[i])
2915                                 die("Could not allocate color '%s'\n", colorname[i]);
2916                         else
2917                                 die("Could not allocate color %d\n", i);
2918                 }
2919         loaded = true;
2920 }
2921
2922 int
2923 xsetcolorname(int x, const char *name) {
2924         Color ncolor;
2925
2926         if(!BETWEEN(x, 0, LEN(dc.col)))
2927                 return 1;
2928
2929
2930         if(!xloadcolor(x, name, &ncolor))
2931                 return 1;
2932
2933         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2934         dc.col[x] = ncolor;
2935         return 0;
2936 }
2937
2938 void
2939 xtermclear(int col1, int row1, int col2, int row2) {
2940         XftDrawRect(xw.draw,
2941                         &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2942                         borderpx + col1 * xw.cw,
2943                         borderpx + row1 * xw.ch,
2944                         (col2-col1+1) * xw.cw,
2945                         (row2-row1+1) * xw.ch);
2946 }
2947
2948 /*
2949  * Absolute coordinates.
2950  */
2951 void
2952 xclear(int x1, int y1, int x2, int y2) {
2953         XftDrawRect(xw.draw,
2954                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2955                         x1, y1, x2-x1, y2-y1);
2956 }
2957
2958 void
2959 xhints(void) {
2960         XClassHint class = {opt_class ? opt_class : termname, termname};
2961         XWMHints wm = {.flags = InputHint, .input = 1};
2962         XSizeHints *sizeh = NULL;
2963
2964         sizeh = XAllocSizeHints();
2965
2966         sizeh->flags = PSize | PResizeInc | PBaseSize;
2967         sizeh->height = xw.h;
2968         sizeh->width = xw.w;
2969         sizeh->height_inc = xw.ch;
2970         sizeh->width_inc = xw.cw;
2971         sizeh->base_height = 2 * borderpx;
2972         sizeh->base_width = 2 * borderpx;
2973         if(xw.isfixed == True) {
2974                 sizeh->flags |= PMaxSize | PMinSize;
2975                 sizeh->min_width = sizeh->max_width = xw.w;
2976                 sizeh->min_height = sizeh->max_height = xw.h;
2977         }
2978         if(xw.gm & (XValue|YValue)) {
2979                 sizeh->flags |= USPosition | PWinGravity;
2980                 sizeh->x = xw.l;
2981                 sizeh->y = xw.t;
2982                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2983         }
2984
2985         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2986                         &class);
2987         XFree(sizeh);
2988 }
2989
2990 int
2991 xgeommasktogravity(int mask) {
2992         switch(mask & (XNegative|YNegative)) {
2993         case 0:
2994                 return NorthWestGravity;
2995         case XNegative:
2996                 return NorthEastGravity;
2997         case YNegative:
2998                 return SouthWestGravity;
2999         }
3000         return SouthEastGravity;
3001 }
3002
3003 int
3004 xloadfont(Font *f, FcPattern *pattern) {
3005         FcPattern *match;
3006         FcResult result;
3007
3008         match = FcFontMatch(NULL, pattern, &result);
3009         if(!match)
3010                 return 1;
3011
3012         if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3013                 FcPatternDestroy(match);
3014                 return 1;
3015         }
3016
3017         f->set = NULL;
3018         f->pattern = FcPatternDuplicate(pattern);
3019
3020         f->ascent = f->match->ascent;
3021         f->descent = f->match->descent;
3022         f->lbearing = 0;
3023         f->rbearing = f->match->max_advance_width;
3024
3025         f->height = f->ascent + f->descent;
3026         f->width = f->lbearing + f->rbearing;
3027
3028         return 0;
3029 }
3030
3031 void
3032 xloadfonts(char *fontstr, double fontsize) {
3033         FcPattern *pattern;
3034         FcResult r_sz, r_psz;
3035         double fontval;
3036         float ceilf(float);
3037
3038         if(fontstr[0] == '-') {
3039                 pattern = XftXlfdParse(fontstr, False, False);
3040         } else {
3041                 pattern = FcNameParse((FcChar8 *)fontstr);
3042         }
3043
3044         if(!pattern)
3045                 die("st: can't open font %s\n", fontstr);
3046
3047         if(fontsize > 1) {
3048                 FcPatternDel(pattern, FC_PIXEL_SIZE);
3049                 FcPatternDel(pattern, FC_SIZE);
3050                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3051                 usedfontsize = fontsize;
3052         } else {
3053                 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3054                 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3055                 if(r_psz == FcResultMatch) {
3056                         usedfontsize = fontval;
3057                 } else if(r_sz == FcResultMatch) {
3058                         usedfontsize = -1;
3059                 } else {
3060                         /*
3061                          * Default font size is 12, if none given. This is to
3062                          * have a known usedfontsize value.
3063                          */
3064                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3065                         usedfontsize = 12;
3066                 }
3067                 defaultfontsize = usedfontsize;
3068         }
3069
3070         FcConfigSubstitute(0, pattern, FcMatchPattern);
3071         FcDefaultSubstitute(pattern);
3072
3073         if(xloadfont(&dc.font, pattern))
3074                 die("st: can't open font %s\n", fontstr);
3075
3076         if(usedfontsize < 0) {
3077                 FcPatternGetDouble(dc.font.match->pattern,
3078                                    FC_PIXEL_SIZE, 0, &fontval);
3079                 usedfontsize = fontval;
3080                 if(fontsize == 0)
3081                         defaultfontsize = fontval;
3082         }
3083
3084         /* Setting character width and height. */
3085         xw.cw = ceilf(dc.font.width * cwscale);
3086         xw.ch = ceilf(dc.font.height * chscale);
3087
3088         FcPatternDel(pattern, FC_SLANT);
3089         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3090         if(xloadfont(&dc.ifont, pattern))
3091                 die("st: can't open font %s\n", fontstr);
3092
3093         FcPatternDel(pattern, FC_WEIGHT);
3094         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3095         if(xloadfont(&dc.ibfont, pattern))
3096                 die("st: can't open font %s\n", fontstr);
3097
3098         FcPatternDel(pattern, FC_SLANT);
3099         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3100         if(xloadfont(&dc.bfont, pattern))
3101                 die("st: can't open font %s\n", fontstr);
3102
3103         FcPatternDestroy(pattern);
3104 }
3105
3106 void
3107 xunloadfont(Font *f) {
3108         XftFontClose(xw.dpy, f->match);
3109         FcPatternDestroy(f->pattern);
3110         if(f->set)
3111                 FcFontSetDestroy(f->set);
3112 }
3113
3114 void
3115 xunloadfonts(void) {
3116         /* Free the loaded fonts in the font cache.  */
3117         while(frclen > 0)
3118                 XftFontClose(xw.dpy, frc[--frclen].font);
3119
3120         xunloadfont(&dc.font);
3121         xunloadfont(&dc.bfont);
3122         xunloadfont(&dc.ifont);
3123         xunloadfont(&dc.ibfont);
3124 }
3125
3126 void
3127 xzoom(const Arg *arg) {
3128         Arg larg;
3129
3130         larg.i = usedfontsize + arg->i;
3131         xzoomabs(&larg);
3132 }
3133
3134 void
3135 xzoomabs(const Arg *arg) {
3136         xunloadfonts();
3137         xloadfonts(usedfont, arg->i);
3138         cresize(0, 0);
3139         redraw();
3140         xhints();
3141 }
3142
3143 void
3144 xzoomreset(const Arg *arg) {
3145         Arg larg;
3146
3147         if(defaultfontsize > 0) {
3148                 larg.i = defaultfontsize;
3149                 xzoomabs(&larg);
3150         }
3151 }
3152
3153 void
3154 xinit(void) {
3155         XGCValues gcvalues;
3156         Cursor cursor;
3157         Window parent;
3158         pid_t thispid = getpid();
3159
3160         if(!(xw.dpy = XOpenDisplay(NULL)))
3161                 die("Can't open display\n");
3162         xw.scr = XDefaultScreen(xw.dpy);
3163         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3164
3165         /* font */
3166         if(!FcInit())
3167                 die("Could not init fontconfig.\n");
3168
3169         usedfont = (opt_font == NULL)? font : opt_font;
3170         xloadfonts(usedfont, 0);
3171
3172         /* colors */
3173         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3174         xloadcols();
3175
3176         /* adjust fixed window geometry */
3177         xw.w = 2 * borderpx + term.col * xw.cw;
3178         xw.h = 2 * borderpx + term.row * xw.ch;
3179         if(xw.gm & XNegative)
3180                 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3181         if(xw.gm & YNegative)
3182                 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3183
3184         /* Events */
3185         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3186         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3187         xw.attrs.bit_gravity = NorthWestGravity;
3188         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3189                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3190                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3191         xw.attrs.colormap = xw.cmap;
3192
3193         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3194                 parent = XRootWindow(xw.dpy, xw.scr);
3195         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3196                         xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3197                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3198                         | CWEventMask | CWColormap, &xw.attrs);
3199
3200         memset(&gcvalues, 0, sizeof(gcvalues));
3201         gcvalues.graphics_exposures = False;
3202         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3203                         &gcvalues);
3204         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3205                         DefaultDepth(xw.dpy, xw.scr));
3206         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3207         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3208
3209         /* Xft rendering context */
3210         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3211
3212         /* input methods */
3213         if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3214                 XSetLocaleModifiers("@im=local");
3215                 if((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3216                         XSetLocaleModifiers("@im=");
3217                         if((xw.xim = XOpenIM(xw.dpy,
3218                                         NULL, NULL, NULL)) == NULL) {
3219                                 die("XOpenIM failed. Could not open input"
3220                                         " device.\n");
3221                         }
3222                 }
3223         }
3224         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3225                                            | XIMStatusNothing, XNClientWindow, xw.win,
3226                                            XNFocusWindow, xw.win, NULL);
3227         if(xw.xic == NULL)
3228                 die("XCreateIC failed. Could not obtain input method.\n");
3229
3230         /* white cursor, black outline */
3231         cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3232         XDefineCursor(xw.dpy, xw.win, cursor);
3233         XRecolorCursor(xw.dpy, cursor,
3234                 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3235                 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3236
3237         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3238         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3239         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3240         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3241
3242         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3243         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3244                         PropModeReplace, (uchar *)&thispid, 1);
3245
3246         xresettitle();
3247         XMapWindow(xw.dpy, xw.win);
3248         xhints();
3249         XSync(xw.dpy, False);
3250 }
3251
3252 void
3253 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3254         int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3255             width = charlen * xw.cw, xp, i;
3256         int frcflags, charexists;
3257         int u8fl, u8fblen, u8cblen, doesexist;
3258         char *u8c, *u8fs;
3259         long unicodep;
3260         Font *font = &dc.font;
3261         FcResult fcres;
3262         FcPattern *fcpattern, *fontpattern;
3263         FcFontSet *fcsets[] = { NULL };
3264         FcCharSet *fccharset;
3265         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3266         XRenderColor colfg, colbg;
3267         XRectangle r;
3268         int oneatatime;
3269
3270         frcflags = FRC_NORMAL;
3271
3272         if(base.mode & ATTR_ITALIC) {
3273                 if(base.fg == defaultfg)
3274                         base.fg = defaultitalic;
3275                 font = &dc.ifont;
3276                 frcflags = FRC_ITALIC;
3277         } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3278                 if(base.fg == defaultfg)
3279                         base.fg = defaultitalic;
3280                 font = &dc.ibfont;
3281                 frcflags = FRC_ITALICBOLD;
3282         } else if(base.mode & ATTR_UNDERLINE) {
3283                 if(base.fg == defaultfg)
3284                         base.fg = defaultunderline;
3285         }
3286
3287         if(IS_TRUECOL(base.fg)) {
3288                 colfg.alpha = 0xffff;
3289                 colfg.red = TRUERED(base.fg);
3290                 colfg.green = TRUEGREEN(base.fg);
3291                 colfg.blue = TRUEBLUE(base.fg);
3292                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3293                 fg = &truefg;
3294         } else {
3295                 fg = &dc.col[base.fg];
3296         }
3297
3298         if(IS_TRUECOL(base.bg)) {
3299                 colbg.alpha = 0xffff;
3300                 colbg.green = TRUEGREEN(base.bg);
3301                 colbg.red = TRUERED(base.bg);
3302                 colbg.blue = TRUEBLUE(base.bg);
3303                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3304                 bg = &truebg;
3305         } else {
3306                 bg = &dc.col[base.bg];
3307         }
3308
3309         if(base.mode & ATTR_BOLD) {
3310                 /*
3311                  * change basic system colors [0-7]
3312                  * to bright system colors [8-15]
3313                  */
3314                 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3315                         fg = &dc.col[base.fg + 8];
3316
3317                 if(base.mode & ATTR_ITALIC) {
3318                         font = &dc.ibfont;
3319                         frcflags = FRC_ITALICBOLD;
3320                 } else {
3321                         font = &dc.bfont;
3322                         frcflags = FRC_BOLD;
3323                 }
3324         }
3325
3326         if(IS_SET(MODE_REVERSE)) {
3327                 if(fg == &dc.col[defaultfg]) {
3328                         fg = &dc.col[defaultbg];
3329                 } else {
3330                         colfg.red = ~fg->color.red;
3331                         colfg.green = ~fg->color.green;
3332                         colfg.blue = ~fg->color.blue;
3333                         colfg.alpha = fg->color.alpha;
3334                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3335                                         &revfg);
3336                         fg = &revfg;
3337                 }
3338
3339                 if(bg == &dc.col[defaultbg]) {
3340                         bg = &dc.col[defaultfg];
3341                 } else {
3342                         colbg.red = ~bg->color.red;
3343                         colbg.green = ~bg->color.green;
3344                         colbg.blue = ~bg->color.blue;
3345                         colbg.alpha = bg->color.alpha;
3346                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3347                                         &revbg);
3348                         bg = &revbg;
3349                 }
3350         }
3351
3352         if(base.mode & ATTR_REVERSE) {
3353                 temp = fg;
3354                 fg = bg;
3355                 bg = temp;
3356         }
3357
3358         if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3359                 colfg.red = fg->color.red / 2;
3360                 colfg.green = fg->color.green / 2;
3361                 colfg.blue = fg->color.blue / 2;
3362                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3363                 fg = &revfg;
3364         }
3365
3366         if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3367                 fg = bg;
3368
3369         if(base.mode & ATTR_INVISIBLE)
3370                 fg = bg;
3371
3372         /* Intelligent cleaning up of the borders. */
3373         if(x == 0) {
3374                 xclear(0, (y == 0)? 0 : winy, borderpx,
3375                         winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3376         }
3377         if(x + charlen >= term.col) {
3378                 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3379                         ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3380         }
3381         if(y == 0)
3382                 xclear(winx, 0, winx + width, borderpx);
3383         if(y == term.row-1)
3384                 xclear(winx, winy + xw.ch, winx + width, xw.h);
3385
3386         /* Clean up the region we want to draw to. */
3387         XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3388
3389         /* Set the clip region because Xft is sometimes dirty. */
3390         r.x = 0;
3391         r.y = 0;
3392         r.height = xw.ch;
3393         r.width = width;
3394         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3395
3396         for(xp = winx; bytelen > 0;) {
3397                 /*
3398                  * Search for the range in the to be printed string of glyphs
3399                  * that are in the main font. Then print that range. If
3400                  * some glyph is found that is not in the font, do the
3401                  * fallback dance.
3402                  */
3403                 u8fs = s;
3404                 u8fblen = 0;
3405                 u8fl = 0;
3406                 oneatatime = font->width != xw.cw;
3407                 for(;;) {
3408                         u8c = s;
3409                         u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3410                         s += u8cblen;
3411                         bytelen -= u8cblen;
3412
3413                         doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3414                         if(doesexist) {
3415                                         u8fl++;
3416                                         u8fblen += u8cblen;
3417                                         if(!oneatatime && bytelen > 0)
3418                                                         continue;
3419                         }
3420
3421                         if(u8fl > 0) {
3422                                 XftDrawStringUtf8(xw.draw, fg,
3423                                                 font->match, xp,
3424                                                 winy + font->ascent,
3425                                                 (FcChar8 *)u8fs,
3426                                                 u8fblen);
3427                                 xp += xw.cw * u8fl;
3428                         }
3429                         break;
3430                 }
3431                 if(doesexist) {
3432                         if(oneatatime)
3433                                 continue;
3434                         break;
3435                 }
3436
3437                 /* Search the font cache. */
3438                 for(i = 0; i < frclen; i++) {
3439                         charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3440                         /* Everything correct. */
3441                         if(charexists && frc[i].flags == frcflags)
3442                                 break;
3443                         /* We got a default font for a not found glyph. */
3444                         if(!charexists && frc[i].flags == frcflags \
3445                                         && frc[i].unicodep == unicodep) {
3446                                 break;
3447                         }
3448                 }
3449
3450                 /* Nothing was found. */
3451                 if(i >= frclen) {
3452                         if(!font->set)
3453                                 font->set = FcFontSort(0, font->pattern,
3454                                                        FcTrue, 0, &fcres);
3455                         fcsets[0] = font->set;
3456
3457                         /*
3458                          * Nothing was found in the cache. Now use
3459                          * some dozen of Fontconfig calls to get the
3460                          * font for one single character.
3461                          *
3462                          * Xft and fontconfig are design failures.
3463                          */
3464                         fcpattern = FcPatternDuplicate(font->pattern);
3465                         fccharset = FcCharSetCreate();
3466
3467                         FcCharSetAddChar(fccharset, unicodep);
3468                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
3469                                         fccharset);
3470                         FcPatternAddBool(fcpattern, FC_SCALABLE,
3471                                         FcTrue);
3472
3473                         FcConfigSubstitute(0, fcpattern,
3474                                         FcMatchPattern);
3475                         FcDefaultSubstitute(fcpattern);
3476
3477                         fontpattern = FcFontSetMatch(0, fcsets, 1,
3478                                         fcpattern, &fcres);
3479
3480                         /*
3481                          * Overwrite or create the new cache entry.
3482                          */
3483                         if(frclen >= LEN(frc)) {
3484                                 frclen = LEN(frc) - 1;
3485                                 XftFontClose(xw.dpy, frc[frclen].font);
3486                                 frc[frclen].unicodep = 0;
3487                         }
3488
3489                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
3490                                         fontpattern);
3491                         frc[frclen].flags = frcflags;
3492                         frc[frclen].unicodep = unicodep;
3493
3494                         i = frclen;
3495                         frclen++;
3496
3497                         FcPatternDestroy(fcpattern);
3498                         FcCharSetDestroy(fccharset);
3499                 }
3500
3501                 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3502                                 xp, winy + frc[i].font->ascent,
3503                                 (FcChar8 *)u8c, u8cblen);
3504
3505                 xp += xw.cw * wcwidth(unicodep);
3506         }
3507
3508         /*
3509          * This is how the loop above actually should be. Why does the
3510          * application have to care about font details?
3511          *
3512          * I have to repeat: Xft and Fontconfig are design failures.
3513          */
3514         /*
3515         XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3516                         winy + font->ascent, (FcChar8 *)s, bytelen);
3517         */
3518
3519         if(base.mode & ATTR_UNDERLINE) {
3520                 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3521                                 width, 1);
3522         }
3523
3524         if(base.mode & ATTR_STRUCK) {
3525                 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3526                                 width, 1);
3527         }
3528
3529         /* Reset clip to none. */
3530         XftDrawSetClip(xw.draw, 0);
3531 }
3532
3533 void
3534 xdrawglyph(Glyph g, int x, int y) {
3535         static char buf[UTF_SIZ];
3536         size_t len = utf8encode(g.u, buf);
3537         int width = g.mode & ATTR_WIDE ? 2 : 1;
3538
3539         xdraws(buf, g, x, y, width, len);
3540 }
3541
3542 void
3543 xdrawcursor(void) {
3544         static int oldx = 0, oldy = 0;
3545         int curx;
3546         Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs};
3547
3548         LIMIT(oldx, 0, term.col-1);
3549         LIMIT(oldy, 0, term.row-1);
3550
3551         curx = term.c.x;
3552
3553         /* adjust position if in dummy */
3554         if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3555                 oldx--;
3556         if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3557                 curx--;
3558
3559         g.u = term.line[term.c.y][term.c.x].u;
3560
3561         /* remove the old cursor */
3562         xdrawglyph(term.line[oldy][oldx], oldx, oldy);
3563
3564         if(IS_SET(MODE_HIDE))
3565                 return;
3566
3567         /* draw the new one */
3568         if(xw.state & WIN_FOCUSED) {
3569                 switch (xw.cursor) {
3570                         case 0: /* Blinking Block */
3571                         case 1: /* Blinking Block (Default) */
3572                         case 2: /* Steady Block */
3573                                 if(IS_SET(MODE_REVERSE)) {
3574                                                 g.mode |= ATTR_REVERSE;
3575                                                 g.fg = defaultcs;
3576                                                 g.bg = defaultfg;
3577                                         }
3578
3579                                 g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
3580                                 xdrawglyph(g, term.c.x, term.c.y);
3581                                 break;
3582                         case 3: /* Blinking Underline */
3583                         case 4: /* Steady Underline */
3584                                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3585                                                 borderpx + curx * xw.cw,
3586                                                 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3587                                                 xw.cw, cursorthickness);
3588                                 break;
3589                         case 5: /* Blinking bar */
3590                         case 6: /* Steady bar */
3591                                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3592                                                 borderpx + curx * xw.cw,
3593                                                 borderpx + term.c.y * xw.ch,
3594                                                 cursorthickness, xw.ch);
3595                                 break;
3596                 }
3597         } else {
3598                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3599                                 borderpx + curx * xw.cw,
3600                                 borderpx + term.c.y * xw.ch,
3601                                 xw.cw - 1, 1);
3602                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3603                                 borderpx + curx * xw.cw,
3604                                 borderpx + term.c.y * xw.ch,
3605                                 1, xw.ch - 1);
3606                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3607                                 borderpx + (curx + 1) * xw.cw - 1,
3608                                 borderpx + term.c.y * xw.ch,
3609                                 1, xw.ch - 1);
3610                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3611                                 borderpx + curx * xw.cw,
3612                                 borderpx + (term.c.y + 1) * xw.ch - 1,
3613                                 xw.cw, 1);
3614         }
3615         oldx = curx, oldy = term.c.y;
3616 }
3617
3618
3619 void
3620 xsettitle(char *p) {
3621         XTextProperty prop;
3622
3623         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3624                         &prop);
3625         XSetWMName(xw.dpy, xw.win, &prop);
3626         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3627         XFree(prop.value);
3628 }
3629
3630 void
3631 xresettitle(void) {
3632         xsettitle(opt_title ? opt_title : "st");
3633 }
3634
3635 void
3636 redraw(void) {
3637         tfulldirt();
3638         draw();
3639 }
3640
3641 void
3642 draw(void) {
3643         drawregion(0, 0, term.col, term.row);
3644         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3645                         xw.h, 0, 0);
3646         XSetForeground(xw.dpy, dc.gc,
3647                         dc.col[IS_SET(MODE_REVERSE)?
3648                                 defaultfg : defaultbg].pixel);
3649 }
3650
3651 void
3652 drawregion(int x1, int y1, int x2, int y2) {
3653         int ic, ib, x, y, ox;
3654         Glyph base, new;
3655         char buf[DRAW_BUF_SIZ];
3656         bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3657
3658         if(!(xw.state & WIN_VISIBLE))
3659                 return;
3660
3661         for(y = y1; y < y2; y++) {
3662                 if(!term.dirty[y])
3663                         continue;
3664
3665                 xtermclear(0, y, term.col, y);
3666                 term.dirty[y] = 0;
3667                 base = term.line[y][0];
3668                 ic = ib = ox = 0;
3669                 for(x = x1; x < x2; x++) {
3670                         new = term.line[y][x];
3671                         if(new.mode == ATTR_WDUMMY)
3672                                 continue;
3673                         if(ena_sel && selected(x, y))
3674                                 new.mode ^= ATTR_REVERSE;
3675                         if(ib > 0 && (ATTRCMP(base, new)
3676                                         || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3677                                 xdraws(buf, base, ox, y, ic, ib);
3678                                 ic = ib = 0;
3679                         }
3680                         if(ib == 0) {
3681                                 ox = x;
3682                                 base = new;
3683                         }
3684
3685                         ib += utf8encode(new.u, buf+ib);
3686                         ic += (new.mode & ATTR_WIDE)? 2 : 1;
3687                 }
3688                 if(ib > 0)
3689                         xdraws(buf, base, ox, y, ic, ib);
3690         }
3691         xdrawcursor();
3692 }
3693
3694 void
3695 expose(XEvent *ev) {
3696         redraw();
3697 }
3698
3699 void
3700 visibility(XEvent *ev) {
3701         XVisibilityEvent *e = &ev->xvisibility;
3702
3703         MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
3704 }
3705
3706 void
3707 unmap(XEvent *ev) {
3708         xw.state &= ~WIN_VISIBLE;
3709 }
3710
3711 void
3712 xsetpointermotion(int set) {
3713         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3714         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3715 }
3716
3717 void
3718 xseturgency(int add) {
3719         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3720
3721         MODBIT(h->flags, add, XUrgencyHint);
3722         XSetWMHints(xw.dpy, xw.win, h);
3723         XFree(h);
3724 }
3725
3726 void
3727 focus(XEvent *ev) {
3728         XFocusChangeEvent *e = &ev->xfocus;
3729
3730         if(e->mode == NotifyGrab)
3731                 return;
3732
3733         if(ev->type == FocusIn) {
3734                 XSetICFocus(xw.xic);
3735                 xw.state |= WIN_FOCUSED;
3736                 xseturgency(0);
3737                 if(IS_SET(MODE_FOCUS))
3738                         ttywrite("\033[I", 3);
3739         } else {
3740                 XUnsetICFocus(xw.xic);
3741                 xw.state &= ~WIN_FOCUSED;
3742                 if(IS_SET(MODE_FOCUS))
3743                         ttywrite("\033[O", 3);
3744         }
3745 }
3746
3747 bool
3748 match(uint mask, uint state) {
3749         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3750 }
3751
3752 void
3753 numlock(const Arg *dummy) {
3754         term.numlock ^= 1;
3755 }
3756
3757 char*
3758 kmap(KeySym k, uint state) {
3759         Key *kp;
3760         int i;
3761
3762         /* Check for mapped keys out of X11 function keys. */
3763         for(i = 0; i < LEN(mappedkeys); i++) {
3764                 if(mappedkeys[i] == k)
3765                         break;
3766         }
3767         if(i == LEN(mappedkeys)) {
3768                 if((k & 0xFFFF) < 0xFD00)
3769                         return NULL;
3770         }
3771
3772         for(kp = key; kp < key + LEN(key); kp++) {
3773                 if(kp->k != k)
3774                         continue;
3775
3776                 if(!match(kp->mask, state))
3777                         continue;
3778
3779                 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3780                         continue;
3781                 if(term.numlock && kp->appkey == 2)
3782                         continue;
3783
3784                 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3785                         continue;
3786
3787                 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3788                         continue;
3789
3790                 return kp->s;
3791         }
3792
3793         return NULL;
3794 }
3795
3796 void
3797 kpress(XEvent *ev) {
3798         XKeyEvent *e = &ev->xkey;
3799         KeySym ksym;
3800         char buf[32], *customkey;
3801         int len;
3802         long c;
3803         Status status;
3804         Shortcut *bp;
3805
3806         if(IS_SET(MODE_KBDLOCK))
3807                 return;
3808
3809         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3810         /* 1. shortcuts */
3811         for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3812                 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3813                         bp->func(&(bp->arg));
3814                         return;
3815                 }
3816         }
3817
3818         /* 2. custom keys from config.h */
3819         if((customkey = kmap(ksym, e->state))) {
3820                 ttysend(customkey, strlen(customkey));
3821                 return;
3822         }
3823
3824         /* 3. composed string from input method */
3825         if(len == 0)
3826                 return;
3827         if(len == 1 && e->state & Mod1Mask) {
3828                 if(IS_SET(MODE_8BIT)) {
3829                         if(*buf < 0177) {
3830                                 c = *buf | 0x80;
3831                                 len = utf8encode(c, buf);
3832                         }
3833                 } else {
3834                         buf[1] = buf[0];
3835                         buf[0] = '\033';
3836                         len = 2;
3837                 }
3838         }
3839         ttysend(buf, len);
3840 }
3841
3842
3843 void
3844 cmessage(XEvent *e) {
3845         /*
3846          * See xembed specs
3847          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3848          */
3849         if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3850                 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3851                         xw.state |= WIN_FOCUSED;
3852                         xseturgency(0);
3853                 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3854                         xw.state &= ~WIN_FOCUSED;
3855                 }
3856         } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3857                 /* Send SIGHUP to shell */
3858                 kill(pid, SIGHUP);
3859                 exit(EXIT_SUCCESS);
3860         }
3861 }
3862
3863 void
3864 cresize(int width, int height) {
3865         int col, row;
3866
3867         if(width != 0)
3868                 xw.w = width;
3869         if(height != 0)
3870                 xw.h = height;
3871
3872         col = (xw.w - 2 * borderpx) / xw.cw;
3873         row = (xw.h - 2 * borderpx) / xw.ch;
3874
3875         tresize(col, row);
3876         xresize(col, row);
3877         ttyresize();
3878 }
3879
3880 void
3881 resize(XEvent *e) {
3882         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3883                 return;
3884
3885         cresize(e->xconfigure.width, e->xconfigure.height);
3886 }
3887
3888 void
3889 run(void) {
3890         XEvent ev;
3891         int w = xw.w, h = xw.h;
3892         fd_set rfd;
3893         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3894         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3895         long deltatime;
3896
3897         /* Waiting for window mapping */
3898         do {
3899                 XNextEvent(xw.dpy, &ev);
3900                 if(ev.type == ConfigureNotify) {
3901                         w = ev.xconfigure.width;
3902                         h = ev.xconfigure.height;
3903                 }
3904         } while(ev.type != MapNotify);
3905
3906         ttynew();
3907         cresize(w, h);
3908
3909         clock_gettime(CLOCK_MONOTONIC, &last);
3910         lastblink = last;
3911
3912         for(xev = actionfps;;) {
3913                 FD_ZERO(&rfd);
3914                 FD_SET(cmdfd, &rfd);
3915                 FD_SET(xfd, &rfd);
3916
3917                 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3918                         if(errno == EINTR)
3919                                 continue;
3920                         die("select failed: %s\n", strerror(errno));
3921                 }
3922                 if(FD_ISSET(cmdfd, &rfd)) {
3923                         ttyread();
3924                         if(blinktimeout) {
3925                                 blinkset = tattrset(ATTR_BLINK);
3926                                 if(!blinkset)
3927                                         MODBIT(term.mode, 0, MODE_BLINK);
3928                         }
3929                 }
3930
3931                 if(FD_ISSET(xfd, &rfd))
3932                         xev = actionfps;
3933
3934                 clock_gettime(CLOCK_MONOTONIC, &now);
3935                 drawtimeout.tv_sec = 0;
3936                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
3937                 tv = &drawtimeout;
3938
3939                 dodraw = 0;
3940                 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3941                         tsetdirtattr(ATTR_BLINK);
3942                         term.mode ^= MODE_BLINK;
3943                         lastblink = now;
3944                         dodraw = 1;
3945                 }
3946                 deltatime = TIMEDIFF(now, last);
3947                 if(deltatime > 1000 / (xev ? xfps : actionfps)) {
3948                         dodraw = 1;
3949                         last = now;
3950                 }
3951
3952                 if(dodraw) {
3953                         while(XPending(xw.dpy)) {
3954                                 XNextEvent(xw.dpy, &ev);
3955                                 if(XFilterEvent(&ev, None))
3956                                         continue;
3957                                 if(handler[ev.type])
3958                                         (handler[ev.type])(&ev);
3959                         }
3960
3961                         draw();
3962                         XFlush(xw.dpy);
3963
3964                         if(xev && !FD_ISSET(xfd, &rfd))
3965                                 xev--;
3966                         if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3967                                 if(blinkset) {
3968                                         if(TIMEDIFF(now, lastblink) \
3969                                                         > blinktimeout) {
3970                                                 drawtimeout.tv_nsec = 1000;
3971                                         } else {
3972                                                 drawtimeout.tv_nsec = (1E6 * \
3973                                                         (blinktimeout - \
3974                                                         TIMEDIFF(now,
3975                                                                 lastblink)));
3976                                         }
3977                                         drawtimeout.tv_sec = \
3978                                             drawtimeout.tv_nsec / 1E9;
3979                                         drawtimeout.tv_nsec %= (long)1E9;
3980                                 } else {
3981                                         tv = NULL;
3982                                 }
3983                         }
3984                 }
3985         }
3986 }
3987
3988 void
3989 usage(void) {
3990         die("%s " VERSION " (c) 2010-2015 st engineers\n"
3991         "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3992         "          [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
3993         "       st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3994         "          [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
3995         argv0);
3996 }
3997
3998 int
3999 main(int argc, char *argv[]) {
4000         uint cols = 80, rows = 24;
4001
4002         xw.l = xw.t = 0;
4003         xw.isfixed = False;
4004         xw.cursor = 0;
4005
4006         ARGBEGIN {
4007         case 'a':
4008                 allowaltscreen = false;
4009                 break;
4010         case 'c':
4011                 opt_class = EARGF(usage());
4012                 break;
4013         case 'e':
4014                 if(argc > 1)
4015                         --argc, ++argv;
4016                 goto run;
4017         case 'f':
4018                 opt_font = EARGF(usage());
4019                 break;
4020         case 'g':
4021                 xw.gm = XParseGeometry(EARGF(usage()),
4022                                 &xw.l, &xw.t, &cols, &rows);
4023                 break;
4024         case 'i':
4025                 xw.isfixed = True;
4026                 break;
4027         case 'o':
4028                 opt_io = EARGF(usage());
4029                 break;
4030         case 'l':
4031                 opt_line = EARGF(usage());
4032                 break;
4033         case 't':
4034                 opt_title = EARGF(usage());
4035                 break;
4036         case 'w':
4037                 opt_embed = EARGF(usage());
4038                 break;
4039         case 'v':
4040         default:
4041                 usage();
4042         } ARGEND;
4043
4044 run:
4045         if(argc > 0) {
4046                 /* eat all remaining arguments */
4047                 opt_cmd = argv;
4048                 if(!opt_title && !opt_line)
4049                         opt_title = basename(xstrdup(argv[0]));
4050         }
4051         setlocale(LC_CTYPE, "");
4052         XSetLocaleModifiers("");
4053         tnew(MAX(cols, 1), MAX(rows, 1));
4054         xinit();
4055         selinit();
4056         run();
4057
4058         return 0;
4059 }
4060