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 LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
  78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
  79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
  80
  81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
  82 #define IS_TRUECOL(x)    (1 << 24 & (x))
  83 #define TRUERED(x)       (((x) & 0xff0000) >> 8)
  84 #define TRUEGREEN(x)     (((x) & 0xff00))
  85 #define TRUEBLUE(x)      (((x) & 0xff) << 8)
  86
  87
  88 enum glyph_attribute {
  89         ATTR_NULL      = 0,
  90         ATTR_BOLD      = 1 << 0,
  91         ATTR_FAINT     = 1 << 1,
  92         ATTR_ITALIC    = 1 << 2,
  93         ATTR_UNDERLINE = 1 << 3,
  94         ATTR_BLINK     = 1 << 4,
  95         ATTR_REVERSE   = 1 << 5,
  96         ATTR_INVISIBLE = 1 << 6,
  97         ATTR_STRUCK    = 1 << 7,
  98         ATTR_WRAP      = 1 << 8,
  99         ATTR_WIDE      = 1 << 9,
 100         ATTR_WDUMMY    = 1 << 10,
 101 };
 102
 103 enum cursor_movement {
 104         CURSOR_SAVE,
 105         CURSOR_LOAD
 106 };
 107
 108 enum cursor_state {
 109         CURSOR_DEFAULT  = 0,
 110         CURSOR_WRAPNEXT = 1,
 111         CURSOR_ORIGIN   = 2
 112 };
 113
 114 enum term_mode {
 115         MODE_WRAP        = 1 << 0,
 116         MODE_INSERT      = 1 << 1,
 117         MODE_APPKEYPAD   = 1 << 2,
 118         MODE_ALTSCREEN   = 1 << 3,
 119         MODE_CRLF        = 1 << 4,
 120         MODE_MOUSEBTN    = 1 << 5,
 121         MODE_MOUSEMOTION = 1 << 6,
 122         MODE_REVERSE     = 1 << 7,
 123         MODE_KBDLOCK     = 1 << 8,
 124         MODE_HIDE        = 1 << 9,
 125         MODE_ECHO        = 1 << 10,
 126         MODE_APPCURSOR   = 1 << 11,
 127         MODE_MOUSESGR    = 1 << 12,
 128         MODE_8BIT        = 1 << 13,
 129         MODE_BLINK       = 1 << 14,
 130         MODE_FBLINK      = 1 << 15,
 131         MODE_FOCUS       = 1 << 16,
 132         MODE_MOUSEX10    = 1 << 17,
 133         MODE_MOUSEMANY   = 1 << 18,
 134         MODE_BRCKTPASTE  = 1 << 19,
 135         MODE_PRINT       = 1 << 20,
 136         MODE_MOUSE       = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
 137                           |MODE_MOUSEMANY,
 138 };
 139
 140 enum charset {
 141         CS_GRAPHIC0,
 142         CS_GRAPHIC1,
 143         CS_UK,
 144         CS_USA,
 145         CS_MULTI,
 146         CS_GER,
 147         CS_FIN
 148 };
 149
 150 enum escape_state {
 151         ESC_START      = 1,
 152         ESC_CSI        = 2,
 153         ESC_STR        = 4,  /* DCS, OSC, PM, APC */
 154         ESC_ALTCHARSET = 8,
 155         ESC_STR_END    = 16, /* a final string was encountered */
 156         ESC_TEST       = 32, /* Enter in test mode */
 157 };
 158
 159 enum window_state {
 160         WIN_VISIBLE = 1,
 161         WIN_FOCUSED = 2
 162 };
 163
 164 enum selection_type {
 165         SEL_REGULAR = 1,
 166         SEL_RECTANGULAR = 2
 167 };
 168
 169 enum selection_snap {
 170         SNAP_WORD = 1,
 171         SNAP_LINE = 2
 172 };
 173
 174 typedef unsigned char uchar;
 175 typedef unsigned int uint;
 176 typedef unsigned long ulong;
 177 typedef unsigned short ushort;
 178
 179 typedef XftDraw *Draw;
 180 typedef XftColor Color;
 181
 182 typedef struct {
 183         char c[UTF_SIZ]; /* character code */
 184         ushort mode;      /* attribute flags */
 185         uint32_t fg;      /* foreground  */
 186         uint32_t bg;      /* background  */
 187 } Glyph;
 188
 189 typedef Glyph *Line;
 190
 191 typedef struct {
 192         Glyph attr; /* current char attributes */
 193         int x;
 194         int y;
 195         char state;
 196 } TCursor;
 197
 198 /* CSI Escape sequence structs */
 199 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
 200 typedef struct {
 201         char buf[ESC_BUF_SIZ]; /* raw string */
 202         int len;               /* raw string length */
 203         char priv;
 204         int arg[ESC_ARG_SIZ];
 205         int narg;              /* nb of args */
 206         char mode[2];
 207 } CSIEscape;
 208
 209 /* STR Escape sequence structs */
 210 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
 211 typedef struct {
 212         char type;             /* ESC type ... */
 213         char buf[STR_BUF_SIZ]; /* raw string */
 214         int len;               /* raw string length */
 215         char *args[STR_ARG_SIZ];
 216         int narg;              /* nb of args */
 217 } STREscape;
 218
 219 /* Internal representation of the screen */
 220 typedef struct {
 221         int row;      /* nb row */
 222         int col;      /* nb col */
 223         Line *line;   /* screen */
 224         Line *alt;    /* alternate screen */
 225         bool *dirty;  /* dirtyness of lines */
 226         TCursor c;    /* cursor */
 227         int top;      /* top    scroll limit */
 228         int bot;      /* bottom scroll limit */
 229         int mode;     /* terminal mode flags */
 230         int esc;      /* escape state flags */
 231         char trantbl[4]; /* charset table translation */
 232         int charset;  /* current charset */
 233         int icharset; /* selected charset for sequence */
 234         bool numlock; /* lock numbers in keyboard */
 235         bool *tabs;
 236 } Term;
 237
 238 /* Purely graphic info */
 239 typedef struct {
 240         Display *dpy;
 241         Colormap cmap;
 242         Window win;
 243         Drawable buf;
 244         Atom xembed, wmdeletewin, netwmname, netwmpid;
 245         XIM xim;
 246         XIC xic;
 247         Draw draw;
 248         Visual *vis;
 249         XSetWindowAttributes attrs;
 250         int scr;
 251         bool isfixed; /* is fixed geometry? */
 252         int l, t; /* left and top offset */
 253         int gm; /* geometry mask */
 254         int tw, th; /* tty width and height */
 255         int w, h; /* window width and height */
 256         int ch; /* char height */
 257         int cw; /* char width  */
 258         char state; /* focus, redraw, visible */
 259         int cursor; /* cursor style */
 260 } XWindow;
 261
 262 typedef struct {
 263         uint b;
 264         uint mask;
 265         char *s;
 266 } Mousekey;
 267
 268 typedef struct {
 269         KeySym k;
 270         uint mask;
 271         char *s;
 272         /* three valued logic variables: 0 indifferent, 1 on, -1 off */
 273         signed char appkey;    /* application keypad */
 274         signed char appcursor; /* application cursor */
 275         signed char crlf;      /* crlf mode          */
 276 } Key;
 277
 278 typedef struct {
 279         int mode;
 280         int type;
 281         int snap;
 282         /*
 283          * Selection variables:
 284          * nb – normalized coordinates of the beginning of the selection
 285          * ne – normalized coordinates of the end of the selection
 286          * ob – original coordinates of the beginning of the selection
 287          * oe – original coordinates of the end of the selection
 288          */
 289         struct {
 290                 int x, y;
 291         } nb, ne, ob, oe;
 292
 293         char *primary, *clipboard;
 294         Atom xtarget;
 295         bool alt;
 296         struct timespec tclick1;
 297         struct timespec tclick2;
 298 } Selection;
 299
 300 typedef union {
 301         int i;
 302         uint ui;
 303         float f;
 304         const void *v;
 305 } Arg;
 306
 307 typedef struct {
 308         uint mod;
 309         KeySym keysym;
 310         void (*func)(const Arg *);
 311         const Arg arg;
 312 } Shortcut;
 313
 314 /* function definitions used in config.h */
 315 static void clipcopy(const Arg *);
 316 static void clippaste(const Arg *);
 317 static void numlock(const Arg *);
 318 static void selpaste(const Arg *);
 319 static void xzoom(const Arg *);
 320 static void xzoomabs(const Arg *);
 321 static void xzoomreset(const Arg *);
 322 static void printsel(const Arg *);
 323 static void printscreen(const Arg *) ;
 324 static void toggleprinter(const Arg *);
 325
 326 /* Config.h for applying patches and the configuration. */
 327 #include "config.h"
 328
 329 /* Font structure */
 330 typedef struct {
 331         int height;
 332         int width;
 333         int ascent;
 334         int descent;
 335         short lbearing;
 336         short rbearing;
 337         XftFont *match;
 338         FcFontSet *set;
 339         FcPattern *pattern;
 340 } Font;
 341
 342 /* Drawing Context */
 343 typedef struct {
 344         Color col[MAX(LEN(colorname), 256)];
 345         Font font, bfont, ifont, ibfont;
 346         GC gc;
 347 } DC;
 348
 349 static void die(const char *, ...);
 350 static void draw(void);
 351 static void redraw(void);
 352 static void drawregion(int, int, int, int);
 353 static void execsh(void);
 354 static void stty(void);
 355 static void sigchld(int);
 356 static void run(void);
 357
 358 static void csidump(void);
 359 static void csihandle(void);
 360 static void csiparse(void);
 361 static void csireset(void);
 362 static int eschandle(uchar);
 363 static void strdump(void);
 364 static void strhandle(void);
 365 static void strparse(void);
 366 static void strreset(void);
 367
 368 static int tattrset(int);
 369 static void tprinter(char *, size_t);
 370 static void tdumpsel(void);
 371 static void tdumpline(int);
 372 static void tdump(void);
 373 static void tclearregion(int, int, int, int);
 374 static void tcursor(int);
 375 static void tdeletechar(int);
 376 static void tdeleteline(int);
 377 static void tinsertblank(int);
 378 static void tinsertblankline(int);
 379 static int tlinelen(int);
 380 static void tmoveto(int, int);
 381 static void tmoveato(int, int);
 382 static void tnew(int, int);
 383 static void tnewline(int);
 384 static void tputtab(int);
 385 static void tputc(char *, int);
 386 static void treset(void);
 387 static void tresize(int, int);
 388 static void tscrollup(int, int);
 389 static void tscrolldown(int, int);
 390 static void tsetattr(int *, int);
 391 static void tsetchar(char *, Glyph *, int, int);
 392 static void tsetscroll(int, int);
 393 static void tswapscreen(void);
 394 static void tsetdirt(int, int);
 395 static void tsetdirtattr(int);
 396 static void tsetmode(bool, bool, int *, int);
 397 static void tfulldirt(void);
 398 static void techo(char *, int);
 399 static void tcontrolcode(uchar );
 400 static void tdectest(char );
 401 static int32_t tdefcolor(int *, int *, int);
 402 static void tdeftran(char);
 403 static inline bool match(uint, uint);
 404 static void ttynew(void);
 405 static void ttyread(void);
 406 static void ttyresize(void);
 407 static void ttysend(char *, size_t);
 408 static void ttywrite(const char *, size_t);
 409 static void tstrsequence(uchar);
 410
 411 static inline ushort sixd_to_16bit(int);
 412 static void xdraws(char *, Glyph, int, int, int, int);
 413 static void xhints(void);
 414 static void xclear(int, int, int, int);
 415 static void xdrawcursor(void);
 416 static void xinit(void);
 417 static void xloadcols(void);
 418 static int xsetcolorname(int, const char *);
 419 static int xgeommasktogravity(int);
 420 static int xloadfont(Font *, FcPattern *);
 421 static void xloadfonts(char *, double);
 422 static void xsettitle(char *);
 423 static void xresettitle(void);
 424 static void xsetpointermotion(int);
 425 static void xseturgency(int);
 426 static void xsetsel(char *, Time);
 427 static void xtermclear(int, int, int, int);
 428 static void xunloadfont(Font *);
 429 static void xunloadfonts(void);
 430 static void xresize(int, int);
 431
 432 static void expose(XEvent *);
 433 static void visibility(XEvent *);
 434 static void unmap(XEvent *);
 435 static char *kmap(KeySym, uint);
 436 static void kpress(XEvent *);
 437 static void cmessage(XEvent *);
 438 static void cresize(int, int);
 439 static void resize(XEvent *);
 440 static void focus(XEvent *);
 441 static void brelease(XEvent *);
 442 static void bpress(XEvent *);
 443 static void bmotion(XEvent *);
 444 static void selnotify(XEvent *);
 445 static void selclear(XEvent *);
 446 static void selrequest(XEvent *);
 447
 448 static void selinit(void);
 449 static void selnormalize(void);
 450 static inline bool selected(int, int);
 451 static char *getsel(void);
 452 static void selcopy(Time);
 453 static void selscroll(int, int);
 454 static void selsnap(int, int *, int *, int);
 455 static int x2col(int);
 456 static int y2row(int);
 457 static void getbuttoninfo(XEvent *);
 458 static void mousereport(XEvent *);
 459
 460 static size_t utf8decode(char *, long *, size_t);
 461 static long utf8decodebyte(char, size_t *);
 462 static size_t utf8encode(long, char *, size_t);
 463 static char utf8encodebyte(long, size_t);
 464 static size_t utf8len(char *);
 465 static size_t utf8validate(long *, size_t);
 466
 467 static ssize_t xwrite(int, const char *, size_t);
 468 static void *xmalloc(size_t);
 469 static void *xrealloc(void *, size_t);
 470 static char *xstrdup(char *);
 471
 472 static void usage(void);
 473
 474 static void (*handler[LASTEvent])(XEvent *) = {
 475         [KeyPress] = kpress,
 476         [ClientMessage] = cmessage,
 477         [ConfigureNotify] = resize,
 478         [VisibilityNotify] = visibility,
 479         [UnmapNotify] = unmap,
 480         [Expose] = expose,
 481         [FocusIn] = focus,
 482         [FocusOut] = focus,
 483         [MotionNotify] = bmotion,
 484         [ButtonPress] = bpress,
 485         [ButtonRelease] = brelease,
 486 /*
 487  * Uncomment if you want the selection to disappear when you select something
 488  * different in another window.
 489  */
 490 /*      [SelectionClear] = selclear, */
 491         [SelectionNotify] = selnotify,
 492         [SelectionRequest] = selrequest,
 493 };
 494
 495 /* Globals */
 496 static DC dc;
 497 static XWindow xw;
 498 static Term term;
 499 static CSIEscape csiescseq;
 500 static STREscape strescseq;
 501 static int cmdfd;
 502 static pid_t pid;
 503 static Selection sel;
 504 static int iofd = STDOUT_FILENO;
 505 static char **opt_cmd = NULL;
 506 static char *opt_io = NULL;
 507 static char *opt_title = NULL;
 508 static char *opt_embed = NULL;
 509 static char *opt_class = NULL;
 510 static char *opt_font = NULL;
 511 static char *opt_line = NULL;
 512 static int oldbutton = 3; /* button event on startup: 3 = release */
 513
 514 static char *usedfont = NULL;
 515 static double usedfontsize = 0;
 516 static double defaultfontsize = 0;
 517
 518 static uchar utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
 519 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
 520 static long utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
 521 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
 522
 523 /* Font Ring Cache */
 524 enum {
 525         FRC_NORMAL,
 526         FRC_ITALIC,
 527         FRC_BOLD,
 528         FRC_ITALICBOLD
 529 };
 530
 531 typedef struct {
 532         XftFont *font;
 533         int flags;
 534         long unicodep;
 535 } Fontcache;
 536
 537 /* Fontcache is an array now. A new font will be appended to the array. */
 538 static Fontcache frc[16];
 539 static int frclen = 0;
 540
 541 ssize_t
 542 xwrite(int fd, const char *s, size_t len) {
 543         size_t aux = len;
 544
 545         while(len > 0) {
 546                 ssize_t r = write(fd, s, len);
 547                 if(r < 0)
 548                         return r;
 549                 len -= r;
 550                 s += r;
 551         }
 552         return aux;
 553 }
 554
 555 void *
 556 xmalloc(size_t len) {
 557         void *p = malloc(len);
 558
 559         if(!p)
 560                 die("Out of memory\n");
 561
 562         return p;
 563 }
 564
 565 void *
 566 xrealloc(void *p, size_t len) {
 567         if((p = realloc(p, len)) == NULL)
 568                 die("Out of memory\n");
 569
 570         return p;
 571 }
 572
 573 char *
 574 xstrdup(char *s) {
 575         if((s = strdup(s)) == NULL)
 576                 die("Out of memory\n");
 577
 578         return s;
 579 }
 580
 581 size_t
 582 utf8decode(char *c, long *u, size_t clen) {
 583         size_t i, j, len, type;
 584         long udecoded;
 585
 586         *u = UTF_INVALID;
 587         if(!clen)
 588                 return 0;
 589         udecoded = utf8decodebyte(c[0], &len);
 590         if(!BETWEEN(len, 1, UTF_SIZ))
 591                 return 1;
 592         for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
 593                 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
 594                 if(type != 0)
 595                         return j;
 596         }
 597         if(j < len)
 598                 return 0;
 599         *u = udecoded;
 600         utf8validate(u, len);
 601         return len;
 602 }
 603
 604 long
 605 utf8decodebyte(char c, size_t *i) {
 606         for(*i = 0; *i < LEN(utfmask); ++(*i))
 607                 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
 608                         return (uchar)c & ~utfmask[*i];
 609         return 0;
 610 }
 611
 612 size_t
 613 utf8encode(long u, char *c, size_t clen) {
 614         size_t len, i;
 615
 616         len = utf8validate(&u, 0);
 617         if(clen < len)
 618                 return 0;
 619         for(i = len - 1; i != 0; --i) {
 620                 c[i] = utf8encodebyte(u, 0);
 621                 u >>= 6;
 622         }
 623         c[0] = utf8encodebyte(u, len);
 624         return len;
 625 }
 626
 627 char
 628 utf8encodebyte(long u, size_t i) {
 629         return utfbyte[i] | (u & ~utfmask[i]);
 630 }
 631
 632 size_t
 633 utf8len(char *c) {
 634         return utf8decode(c, &(long){0}, UTF_SIZ);
 635 }
 636
 637 size_t
 638 utf8validate(long *u, size_t i) {
 639         if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
 640                 *u = UTF_INVALID;
 641         for(i = 1; *u > utfmax[i]; ++i)
 642                 ;
 643         return i;
 644 }
 645
 646 void
 647 selinit(void) {
 648         memset(&sel.tclick1, 0, sizeof(sel.tclick1));
 649         memset(&sel.tclick2, 0, sizeof(sel.tclick2));
 650         sel.mode = 0;
 651         sel.ob.x = -1;
 652         sel.primary = NULL;
 653         sel.clipboard = NULL;
 654         sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
 655         if(sel.xtarget == None)
 656                 sel.xtarget = XA_STRING;
 657 }
 658
 659 int
 660 x2col(int x) {
 661         x -= borderpx;
 662         x /= xw.cw;
 663
 664         return LIMIT(x, 0, term.col-1);
 665 }
 666
 667 int
 668 y2row(int y) {
 669         y -= borderpx;
 670         y /= xw.ch;
 671
 672         return LIMIT(y, 0, term.row-1);
 673 }
 674
 675 int
 676 tlinelen(int y) {
 677         int i = term.col;
 678
 679         if(term.line[y][i - 1].mode & ATTR_WRAP)
 680                 return i;
 681
 682         while(i > 0 && term.line[y][i - 1].c[0] == ' ')
 683                 --i;
 684
 685         return i;
 686 }
 687
 688 void
 689 selnormalize(void) {
 690         int i;
 691
 692         if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
 693                 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
 694                 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
 695         } else {
 696                 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
 697                 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
 698         }
 699         sel.nb.y = MIN(sel.ob.y, sel.oe.y);
 700         sel.ne.y = MAX(sel.ob.y, sel.oe.y);
 701
 702         selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
 703         selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
 704
 705         /* expand selection over line breaks */
 706         if (sel.type == SEL_RECTANGULAR)
 707                 return;
 708         i = tlinelen(sel.nb.y);
 709         if (i < sel.nb.x)
 710                 sel.nb.x = i;
 711         if (tlinelen(sel.ne.y) <= sel.ne.x)
 712                 sel.ne.x = term.col - 1;
 713 }
 714
 715 bool
 716 selected(int x, int y) {
 717         if(sel.type == SEL_RECTANGULAR)
 718                 return BETWEEN(y, sel.nb.y, sel.ne.y)
 719                     && BETWEEN(x, sel.nb.x, sel.ne.x);
 720
 721         return BETWEEN(y, sel.nb.y, sel.ne.y)
 722             && (y != sel.nb.y || x >= sel.nb.x)
 723             && (y != sel.ne.y || x <= sel.ne.x);
 724 }
 725
 726 void
 727 selsnap(int mode, int *x, int *y, int direction) {
 728         int newx, newy, xt, yt;
 729         bool delim, prevdelim;
 730         Glyph *gp, *prevgp;
 731
 732         switch(mode) {
 733         case SNAP_WORD:
 734                 /*
 735                  * Snap around if the word wraps around at the end or
 736                  * beginning of a line.
 737                  */
 738                 prevgp = &term.line[*y][*x];
 739                 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
 740                 for(;;) {
 741                         newx = *x + direction;
 742                         newy = *y;
 743                         if(!BETWEEN(newx, 0, term.col - 1)) {
 744                                 newy += direction;
 745                                 newx = (newx + term.col) % term.col;
 746                                 if (!BETWEEN(newy, 0, term.row - 1))
 747                                         break;
 748
 749                                 if(direction > 0)
 750                                         yt = *y, xt = *x;
 751                                 else
 752                                         yt = newy, xt = newx;
 753                                 if(!(term.line[yt][xt].mode & ATTR_WRAP))
 754                                         break;
 755                         }
 756
 757                         if (newx >= tlinelen(newy))
 758                                 break;
 759
 760                         gp = &term.line[newy][newx];
 761                         delim = strchr(worddelimiters, gp->c[0]) != NULL;
 762                         if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
 763                                         || (delim && gp->c[0] != prevgp->c[0])))
 764                                 break;
 765
 766                         *x = newx;
 767                         *y = newy;
 768                         prevgp = gp;
 769                         prevdelim = delim;
 770                 }
 771                 break;
 772         case SNAP_LINE:
 773                 /*
 774                  * Snap around if the the previous line or the current one
 775                  * has set ATTR_WRAP at its end. Then the whole next or
 776                  * previous line will be selected.
 777                  */
 778                 *x = (direction < 0) ? 0 : term.col - 1;
 779                 if(direction < 0 && *y > 0) {
 780                         for(; *y > 0; *y += direction) {
 781                                 if(!(term.line[*y-1][term.col-1].mode
 782                                                 & ATTR_WRAP)) {
 783                                         break;
 784                                 }
 785                         }
 786                 } else if(direction > 0 && *y < term.row-1) {
 787                         for(; *y < term.row; *y += direction) {
 788                                 if(!(term.line[*y][term.col-1].mode
 789                                                 & ATTR_WRAP)) {
 790                                         break;
 791                                 }
 792                         }
 793                 }
 794                 break;
 795         }
 796 }
 797
 798 void
 799 getbuttoninfo(XEvent *e) {
 800         int type;
 801         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 802
 803         sel.alt = IS_SET(MODE_ALTSCREEN);
 804
 805         sel.oe.x = x2col(e->xbutton.x);
 806         sel.oe.y = y2row(e->xbutton.y);
 807         selnormalize();
 808
 809         sel.type = SEL_REGULAR;
 810         for(type = 1; type < LEN(selmasks); ++type) {
 811                 if(match(selmasks[type], state)) {
 812                         sel.type = type;
 813                         break;
 814                 }
 815         }
 816 }
 817
 818 void
 819 mousereport(XEvent *e) {
 820         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 821             button = e->xbutton.button, state = e->xbutton.state,
 822             len;
 823         char buf[40];
 824         static int ox, oy;
 825
 826         /* from urxvt */
 827         if(e->xbutton.type == MotionNotify) {
 828                 if(x == ox && y == oy)
 829                         return;
 830                 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 831                         return;
 832                 /* MOUSE_MOTION: no reporting if no button is pressed */
 833                 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 834                         return;
 835
 836                 button = oldbutton + 32;
 837                 ox = x;
 838                 oy = y;
 839         } else {
 840                 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 841                         button = 3;
 842                 } else {
 843                         button -= Button1;
 844                         if(button >= 3)
 845                                 button += 64 - 3;
 846                 }
 847                 if(e->xbutton.type == ButtonPress) {
 848                         oldbutton = button;
 849                         ox = x;
 850                         oy = y;
 851                 } else if(e->xbutton.type == ButtonRelease) {
 852                         oldbutton = 3;
 853                         /* MODE_MOUSEX10: no button release reporting */
 854                         if(IS_SET(MODE_MOUSEX10))
 855                                 return;
 856                         if (button == 64 || button == 65)
 857                                 return;
 858                 }
 859         }
 860
 861         if(!IS_SET(MODE_MOUSEX10)) {
 862                 button += (state & ShiftMask   ? 4  : 0)
 863                         + (state & Mod4Mask    ? 8  : 0)
 864                         + (state & ControlMask ? 16 : 0);
 865         }
 866
 867         len = 0;
 868         if(IS_SET(MODE_MOUSESGR)) {
 869                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 870                                 button, x+1, y+1,
 871                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 872         } else if(x < 223 && y < 223) {
 873                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 874                                 32+button, 32+x+1, 32+y+1);
 875         } else {
 876                 return;
 877         }
 878
 879         ttywrite(buf, len);
 880 }
 881
 882 void
 883 bpress(XEvent *e) {
 884         struct timespec now;
 885         Mousekey *mk;
 886
 887         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 888                 mousereport(e);
 889                 return;
 890         }
 891
 892         for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
 893                 if(e->xbutton.button == mk->b
 894                                 && match(mk->mask, e->xbutton.state)) {
 895                         ttysend(mk->s, strlen(mk->s));
 896                         return;
 897                 }
 898         }
 899
 900         if(e->xbutton.button == Button1) {
 901                 clock_gettime(CLOCK_MONOTONIC, &now);
 902
 903                 /* Clear previous selection, logically and visually. */
 904                 selclear(NULL);
 905                 sel.mode = 1;
 906                 sel.type = SEL_REGULAR;
 907                 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
 908                 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
 909
 910                 /*
 911                  * If the user clicks below predefined timeouts specific
 912                  * snapping behaviour is exposed.
 913                  */
 914                 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
 915                         sel.snap = SNAP_LINE;
 916                 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
 917                         sel.snap = SNAP_WORD;
 918                 } else {
 919                         sel.snap = 0;
 920                 }
 921                 selnormalize();
 922
 923                 /*
 924                  * Draw selection, unless it's regular and we don't want to
 925                  * make clicks visible
 926                  */
 927                 if(sel.snap != 0) {
 928                         sel.mode++;
 929                         tsetdirt(sel.nb.y, sel.ne.y);
 930                 }
 931                 sel.tclick2 = sel.tclick1;
 932                 sel.tclick1 = now;
 933         }
 934 }
 935
 936 char *
 937 getsel(void) {
 938         char *str, *ptr;
 939         int y, bufsize, size, lastx, linelen;
 940         Glyph *gp, *last;
 941
 942         if(sel.ob.x == -1)
 943                 return NULL;
 944
 945         bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
 946         ptr = str = xmalloc(bufsize);
 947
 948         /* append every set & selected glyph to the selection */
 949         for(y = sel.nb.y; y <= sel.ne.y; y++) {
 950                 linelen = tlinelen(y);
 951
 952                 if(sel.type == SEL_RECTANGULAR) {
 953                         gp = &term.line[y][sel.nb.x];
 954                         lastx = sel.ne.x;
 955                 } else {
 956                         gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
 957                         lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
 958                 }
 959                 last = &term.line[y][MIN(lastx, linelen-1)];
 960                 while(last >= gp && last->c[0] == ' ')
 961                         --last;
 962
 963                 for( ; gp <= last; ++gp) {
 964                         if(gp->mode & ATTR_WDUMMY)
 965                                 continue;
 966
 967                         size = utf8len(gp->c);
 968                         memcpy(ptr, gp->c, size);
 969                         ptr += size;
 970                 }
 971
 972                 /*
 973                  * Copy and pasting of line endings is inconsistent
 974                  * in the inconsistent terminal and GUI world.
 975                  * The best solution seems like to produce '\n' when
 976                  * something is copied from st and convert '\n' to
 977                  * '\r', when something to be pasted is received by
 978                  * st.
 979                  * FIXME: Fix the computer world.
 980                  */
 981                 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
 982                         *ptr++ = '\n';
 983         }
 984         *ptr = 0;
 985         return str;
 986 }
 987
 988 void
 989 selcopy(Time t) {
 990         xsetsel(getsel(), t);
 991 }
 992
 993 void
 994 selnotify(XEvent *e) {
 995         ulong nitems, ofs, rem;
 996         int format;
 997         uchar *data, *last, *repl;
 998         Atom type;
 999         XSelectionEvent *xsev;
1000
1001         ofs = 0;
1002         xsev = &e->xselection;
1003         if (xsev->property == None)
1004             return;
1005         do {
1006                 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1007                                         BUFSIZ/4, False, AnyPropertyType,
1008                                         &type, &format, &nitems, &rem,
1009                                         &data)) {
1010                         fprintf(stderr, "Clipboard allocation failed\n");
1011                         return;
1012                 }
1013
1014                 /*
1015                  * As seen in getsel:
1016                  * Line endings are inconsistent in the terminal and GUI world
1017                  * copy and pasting. When receiving some selection data,
1018                  * replace all '\n' with '\r'.
1019                  * FIXME: Fix the computer world.
1020                  */
1021                 repl = data;
1022                 last = data + nitems * format / 8;
1023                 while((repl = memchr(repl, '\n', last - repl))) {
1024                         *repl++ = '\r';
1025                 }
1026
1027                 if(IS_SET(MODE_BRCKTPASTE))
1028                         ttywrite("\033[200~", 6);
1029                 ttysend((char *)data, nitems * format / 8);
1030                 if(IS_SET(MODE_BRCKTPASTE))
1031                         ttywrite("\033[201~", 6);
1032                 XFree(data);
1033                 /* number of 32-bit chunks returned */
1034                 ofs += nitems * format / 32;
1035         } while(rem > 0);
1036 }
1037
1038 void
1039 selpaste(const Arg *dummy) {
1040         XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1041                         xw.win, CurrentTime);
1042 }
1043
1044 void
1045 clipcopy(const Arg *dummy) {
1046         Atom clipboard;
1047
1048         if(sel.clipboard != NULL)
1049                 free(sel.clipboard);
1050
1051         if(sel.primary != NULL) {
1052                 sel.clipboard = xstrdup(sel.primary);
1053                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1054                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1055         }
1056 }
1057
1058 void
1059 clippaste(const Arg *dummy) {
1060         Atom clipboard;
1061
1062         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1063         XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1064                         xw.win, CurrentTime);
1065 }
1066
1067 void
1068 selclear(XEvent *e) {
1069         if(sel.ob.x == -1)
1070                 return;
1071         sel.ob.x = -1;
1072         tsetdirt(sel.nb.y, sel.ne.y);
1073 }
1074
1075 void
1076 selrequest(XEvent *e) {
1077         XSelectionRequestEvent *xsre;
1078         XSelectionEvent xev;
1079         Atom xa_targets, string, clipboard;
1080         char *seltext;
1081
1082         xsre = (XSelectionRequestEvent *) e;
1083         xev.type = SelectionNotify;
1084         xev.requestor = xsre->requestor;
1085         xev.selection = xsre->selection;
1086         xev.target = xsre->target;
1087         xev.time = xsre->time;
1088         if (xsre->property == None)
1089             xsre->property = xsre->target;
1090
1091         /* reject */
1092         xev.property = None;
1093
1094         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1095         if(xsre->target == xa_targets) {
1096                 /* respond with the supported type */
1097                 string = sel.xtarget;
1098                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1099                                 XA_ATOM, 32, PropModeReplace,
1100                                 (uchar *) &string, 1);
1101                 xev.property = xsre->property;
1102         } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1103                 /*
1104                  * xith XA_STRING non ascii characters may be incorrect in the
1105                  * requestor. It is not our problem, use utf8.
1106                  */
1107                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1108                 if(xsre->selection == XA_PRIMARY) {
1109                         seltext = sel.primary;
1110                 } else if(xsre->selection == clipboard) {
1111                         seltext = sel.clipboard;
1112                 } else {
1113                         fprintf(stderr,
1114                                 "Unhandled clipboard selection 0x%lx\n",
1115                                 xsre->selection);
1116                         return;
1117                 }
1118                 if(seltext != NULL) {
1119                         XChangeProperty(xsre->display, xsre->requestor,
1120                                         xsre->property, xsre->target,
1121                                         8, PropModeReplace,
1122                                         (uchar *)seltext, strlen(seltext));
1123                         xev.property = xsre->property;
1124                 }
1125         }
1126
1127         /* all done, send a notification to the listener */
1128         if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1129                 fprintf(stderr, "Error sending SelectionNotify event\n");
1130 }
1131
1132 void
1133 xsetsel(char *str, Time t) {
1134         free(sel.primary);
1135         sel.primary = str;
1136
1137         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1138         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1139             selclear(0);
1140 }
1141
1142 void
1143 brelease(XEvent *e) {
1144         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1145                 mousereport(e);
1146                 return;
1147         }
1148
1149         if(e->xbutton.button == Button2) {
1150                 selpaste(NULL);
1151         } else if(e->xbutton.button == Button1) {
1152                 if(sel.mode < 2) {
1153                         selclear(NULL);
1154                 } else {
1155                         getbuttoninfo(e);
1156                         selcopy(e->xbutton.time);
1157                 }
1158                 sel.mode = 0;
1159                 tsetdirt(sel.nb.y, sel.ne.y);
1160         }
1161 }
1162
1163 void
1164 bmotion(XEvent *e) {
1165         int oldey, oldex, oldsby, oldsey;
1166
1167         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1168                 mousereport(e);
1169                 return;
1170         }
1171
1172         if(!sel.mode)
1173                 return;
1174
1175         sel.mode++;
1176         oldey = sel.oe.y;
1177         oldex = sel.oe.x;
1178         oldsby = sel.nb.y;
1179         oldsey = sel.ne.y;
1180         getbuttoninfo(e);
1181
1182         if(oldey != sel.oe.y || oldex != sel.oe.x)
1183                 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1184 }
1185
1186 void
1187 die(const char *errstr, ...) {
1188         va_list ap;
1189
1190         va_start(ap, errstr);
1191         vfprintf(stderr, errstr, ap);
1192         va_end(ap);
1193         exit(EXIT_FAILURE);
1194 }
1195
1196 void
1197 execsh(void) {
1198         char **args, *sh, *prog;
1199         const struct passwd *pw;
1200         char buf[sizeof(long) * 8 + 1];
1201
1202         errno = 0;
1203         if((pw = getpwuid(getuid())) == NULL) {
1204                 if(errno)
1205                         die("getpwuid:%s\n", strerror(errno));
1206                 else
1207                         die("who are you?\n");
1208         }
1209
1210         if (!(sh = getenv("SHELL"))) {
1211                 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1212         }
1213
1214         if(opt_cmd)
1215                 prog = opt_cmd[0];
1216         else if(utmp)
1217                 prog = utmp;
1218         else
1219                 prog = sh;
1220         args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1221
1222         snprintf(buf, sizeof(buf), "%lu", xw.win);
1223
1224         unsetenv("COLUMNS");
1225         unsetenv("LINES");
1226         unsetenv("TERMCAP");
1227         setenv("LOGNAME", pw->pw_name, 1);
1228         setenv("USER", pw->pw_name, 1);
1229         setenv("SHELL", sh, 1);
1230         setenv("HOME", pw->pw_dir, 1);
1231         setenv("TERM", termname, 1);
1232         setenv("WINDOWID", buf, 1);
1233
1234         signal(SIGCHLD, SIG_DFL);
1235         signal(SIGHUP, SIG_DFL);
1236         signal(SIGINT, SIG_DFL);
1237         signal(SIGQUIT, SIG_DFL);
1238         signal(SIGTERM, SIG_DFL);
1239         signal(SIGALRM, SIG_DFL);
1240
1241         execvp(prog, args);
1242         _exit(EXIT_FAILURE);
1243 }
1244
1245 void
1246 sigchld(int a) {
1247         int stat, ret;
1248
1249         if(waitpid(pid, &stat, 0) < 0)
1250                 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1251
1252         ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1253         if (ret != EXIT_SUCCESS)
1254                 die("child finished with error '%d'\n", stat);
1255         exit(EXIT_SUCCESS);
1256 }
1257
1258
1259 void
1260 stty(void)
1261 {
1262         char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1263         size_t n, siz;
1264
1265         if((n = strlen(stty_args)) > sizeof(cmd)-1)
1266                 die("incorrect stty parameters\n");
1267         memcpy(cmd, stty_args, n);
1268         q = cmd + n;
1269         siz = sizeof(cmd) - n;
1270         for(p = opt_cmd; p && (s = *p); ++p) {
1271                 if((n = strlen(s)) > siz-1)
1272                         die("stty parameter length too long\n");
1273                 *q++ = ' ';
1274                 q = memcpy(q, s, n);
1275                 q += n;
1276                 siz-= n + 1;
1277         }
1278         *q = '\0';
1279         system(cmd);
1280 }
1281
1282 void
1283 ttynew(void) {
1284         int m, s;
1285         struct winsize w = {term.row, term.col, 0, 0};
1286
1287         if(opt_io) {
1288                 term.mode |= MODE_PRINT;
1289                 iofd = (!strcmp(opt_io, "-")) ?
1290                           STDOUT_FILENO :
1291                           open(opt_io, O_WRONLY | O_CREAT, 0666);
1292                 if(iofd < 0) {
1293                         fprintf(stderr, "Error opening %s:%s\n",
1294                                 opt_io, strerror(errno));
1295                 }
1296         }
1297
1298         if (opt_line) {
1299                 if((cmdfd = open(opt_line, O_RDWR)) < 0)
1300                         die("open line failed: %s\n", strerror(errno));
1301                 close(STDIN_FILENO);
1302                 dup(cmdfd);
1303                 stty();
1304                 return;
1305         }
1306
1307         /* seems to work fine on linux, openbsd and freebsd */
1308         if(openpty(&m, &s, NULL, NULL, &w) < 0)
1309                 die("openpty failed: %s\n", strerror(errno));
1310
1311         switch(pid = fork()) {
1312         case -1:
1313                 die("fork failed\n");
1314                 break;
1315         case 0:
1316                 close(iofd);
1317                 setsid(); /* create a new process group */
1318                 dup2(s, STDIN_FILENO);
1319                 dup2(s, STDOUT_FILENO);
1320                 dup2(s, STDERR_FILENO);
1321                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1322                         die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1323                 close(s);
1324                 close(m);
1325                 execsh();
1326                 break;
1327         default:
1328                 close(s);
1329                 cmdfd = m;
1330                 signal(SIGCHLD, sigchld);
1331                 break;
1332         }
1333 }
1334
1335 void
1336 ttyread(void) {
1337         static char buf[BUFSIZ];
1338         static int buflen = 0;
1339         char *ptr;
1340         char s[UTF_SIZ];
1341         int charsize; /* size of utf8 char in bytes */
1342         long unicodep;
1343         int ret;
1344
1345         /* append read bytes to unprocessed bytes */
1346         if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1347                 die("Couldn't read from shell: %s\n", strerror(errno));
1348
1349         /* process every complete utf8 char */
1350         buflen += ret;
1351         ptr = buf;
1352         while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1353                 utf8encode(unicodep, s, UTF_SIZ);
1354                 tputc(s, charsize);
1355                 ptr += charsize;
1356                 buflen -= charsize;
1357         }
1358
1359         /* keep any uncomplete utf8 char for the next call */
1360         memmove(buf, ptr, buflen);
1361 }
1362
1363 void
1364 ttywrite(const char *s, size_t n) {
1365         if(xwrite(cmdfd, s, n) == -1)
1366                 die("write error on tty: %s\n", strerror(errno));
1367 }
1368
1369 void
1370 ttysend(char *s, size_t n) {
1371         ttywrite(s, n);
1372         if(IS_SET(MODE_ECHO))
1373                 techo(s, n);
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(char *c, 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                 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1639                         c = vt100_0[c[0] - 0x41];
1640                 }
1641         }
1642
1643         if(term.line[y][x].mode & ATTR_WIDE) {
1644                 if(x+1 < term.col) {
1645                         term.line[y][x+1].c[0] = ' ';
1646                         term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1647                 }
1648         } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1649                 term.line[y][x-1].c[0] = ' ';
1650                 term.line[y][x-1].mode &= ~ATTR_WIDE;
1651         }
1652
1653         term.dirty[y] = 1;
1654         term.line[y][x] = *attr;
1655         memcpy(term.line[y][x].c, c, UTF_SIZ);
1656 }
1657
1658 void
1659 tclearregion(int x1, int y1, int x2, int y2) {
1660         int x, y, temp;
1661         Glyph *gp;
1662
1663         if(x1 > x2)
1664                 temp = x1, x1 = x2, x2 = temp;
1665         if(y1 > y2)
1666                 temp = y1, y1 = y2, y2 = temp;
1667
1668         LIMIT(x1, 0, term.col-1);
1669         LIMIT(x2, 0, term.col-1);
1670         LIMIT(y1, 0, term.row-1);
1671         LIMIT(y2, 0, term.row-1);
1672
1673         for(y = y1; y <= y2; y++) {
1674                 term.dirty[y] = 1;
1675                 for(x = x1; x <= x2; x++) {
1676                         gp = &term.line[y][x];
1677                         if(selected(x, y))
1678                                 selclear(NULL);
1679                         gp->fg = term.c.attr.fg;
1680                         gp->bg = term.c.attr.bg;
1681                         gp->mode = 0;
1682                         memcpy(gp->c, " ", 2);
1683                 }
1684         }
1685 }
1686
1687 void
1688 tdeletechar(int n) {
1689         int dst, src, size;
1690         Glyph *line;
1691
1692         LIMIT(n, 0, term.col - term.c.x);
1693
1694         dst = term.c.x;
1695         src = term.c.x + n;
1696         size = term.col - src;
1697         line = term.line[term.c.y];
1698
1699         memmove(&line[dst], &line[src], size * sizeof(Glyph));
1700         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1701 }
1702
1703 void
1704 tinsertblank(int n) {
1705         int dst, src, size;
1706         Glyph *line;
1707
1708         LIMIT(n, 0, term.col - term.c.x);
1709
1710         dst = term.c.x + n;
1711         src = term.c.x;
1712         size = term.col - dst;
1713         line = term.line[term.c.y];
1714
1715         memmove(&line[dst], &line[src], size * sizeof(Glyph));
1716         tclearregion(src, term.c.y, dst - 1, term.c.y);
1717 }
1718
1719 void
1720 tinsertblankline(int n) {
1721         if(BETWEEN(term.c.y, term.top, term.bot))
1722                 tscrolldown(term.c.y, n);
1723 }
1724
1725 void
1726 tdeleteline(int n) {
1727         if(BETWEEN(term.c.y, term.top, term.bot))
1728                 tscrollup(term.c.y, n);
1729 }
1730
1731 int32_t
1732 tdefcolor(int *attr, int *npar, int l) {
1733         int32_t idx = -1;
1734         uint r, g, b;
1735
1736         switch (attr[*npar + 1]) {
1737         case 2: /* direct color in RGB space */
1738                 if (*npar + 4 >= l) {
1739                         fprintf(stderr,
1740                                 "erresc(38): Incorrect number of parameters (%d)\n",
1741                                 *npar);
1742                         break;
1743                 }
1744                 r = attr[*npar + 2];
1745                 g = attr[*npar + 3];
1746                 b = attr[*npar + 4];
1747                 *npar += 4;
1748                 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1749                         fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1750                                 r, g, b);
1751                 else
1752                         idx = TRUECOLOR(r, g, b);
1753                 break;
1754         case 5: /* indexed color */
1755                 if (*npar + 2 >= l) {
1756                         fprintf(stderr,
1757                                 "erresc(38): Incorrect number of parameters (%d)\n",
1758                                 *npar);
1759                         break;
1760                 }
1761                 *npar += 2;
1762                 if(!BETWEEN(attr[*npar], 0, 255))
1763                         fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1764                 else
1765                         idx = attr[*npar];
1766                 break;
1767         case 0: /* implemented defined (only foreground) */
1768         case 1: /* transparent */
1769         case 3: /* direct color in CMY space */
1770         case 4: /* direct color in CMYK space */
1771         default:
1772                 fprintf(stderr,
1773                         "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1774                 break;
1775         }
1776
1777         return idx;
1778 }
1779
1780 void
1781 tsetattr(int *attr, int l) {
1782         int i;
1783         int32_t idx;
1784
1785         for(i = 0; i < l; i++) {
1786                 switch(attr[i]) {
1787                 case 0:
1788                         term.c.attr.mode &= ~(
1789                                 ATTR_BOLD       |
1790                                 ATTR_FAINT      |
1791                                 ATTR_ITALIC     |
1792                                 ATTR_UNDERLINE  |
1793                                 ATTR_BLINK      |
1794                                 ATTR_REVERSE    |
1795                                 ATTR_INVISIBLE  |
1796                                 ATTR_STRUCK     );
1797                         term.c.attr.fg = defaultfg;
1798                         term.c.attr.bg = defaultbg;
1799                         break;
1800                 case 1:
1801                         term.c.attr.mode |= ATTR_BOLD;
1802                         break;
1803                 case 2:
1804                         term.c.attr.mode |= ATTR_FAINT;
1805                         break;
1806                 case 3:
1807                         term.c.attr.mode |= ATTR_ITALIC;
1808                         break;
1809                 case 4:
1810                         term.c.attr.mode |= ATTR_UNDERLINE;
1811                         break;
1812                 case 5: /* slow blink */
1813                         /* FALLTHROUGH */
1814                 case 6: /* rapid blink */
1815                         term.c.attr.mode |= ATTR_BLINK;
1816                         break;
1817                 case 7:
1818                         term.c.attr.mode |= ATTR_REVERSE;
1819                         break;
1820                 case 8:
1821                         term.c.attr.mode |= ATTR_INVISIBLE;
1822                         break;
1823                 case 9:
1824                         term.c.attr.mode |= ATTR_STRUCK;
1825                         break;
1826                 case 22:
1827                         term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1828                         break;
1829                 case 23:
1830                         term.c.attr.mode &= ~ATTR_ITALIC;
1831                         break;
1832                 case 24:
1833                         term.c.attr.mode &= ~ATTR_UNDERLINE;
1834                         break;
1835                 case 25:
1836                         term.c.attr.mode &= ~ATTR_BLINK;
1837                         break;
1838                 case 27:
1839                         term.c.attr.mode &= ~ATTR_REVERSE;
1840                         break;
1841                 case 28:
1842                         term.c.attr.mode &= ~ATTR_INVISIBLE;
1843                         break;
1844                 case 29:
1845                         term.c.attr.mode &= ~ATTR_STRUCK;
1846                         break;
1847                 case 38:
1848                         if ((idx = tdefcolor(attr, &i, l)) >= 0)
1849                                 term.c.attr.fg = idx;
1850                         break;
1851                 case 39:
1852                         term.c.attr.fg = defaultfg;
1853                         break;
1854                 case 48:
1855                         if ((idx = tdefcolor(attr, &i, l)) >= 0)
1856                                 term.c.attr.bg = idx;
1857                         break;
1858                 case 49:
1859                         term.c.attr.bg = defaultbg;
1860                         break;
1861                 default:
1862                         if(BETWEEN(attr[i], 30, 37)) {
1863                                 term.c.attr.fg = attr[i] - 30;
1864                         } else if(BETWEEN(attr[i], 40, 47)) {
1865                                 term.c.attr.bg = attr[i] - 40;
1866                         } else if(BETWEEN(attr[i], 90, 97)) {
1867                                 term.c.attr.fg = attr[i] - 90 + 8;
1868                         } else if(BETWEEN(attr[i], 100, 107)) {
1869                                 term.c.attr.bg = attr[i] - 100 + 8;
1870                         } else {
1871                                 fprintf(stderr,
1872                                         "erresc(default): gfx attr %d unknown\n",
1873                                         attr[i]), csidump();
1874                         }
1875                         break;
1876                 }
1877         }
1878 }
1879
1880 void
1881 tsetscroll(int t, int b) {
1882         int temp;
1883
1884         LIMIT(t, 0, term.row-1);
1885         LIMIT(b, 0, term.row-1);
1886         if(t > b) {
1887                 temp = t;
1888                 t = b;
1889                 b = temp;
1890         }
1891         term.top = t;
1892         term.bot = b;
1893 }
1894
1895 void
1896 tsetmode(bool priv, bool set, int *args, int narg) {
1897         int *lim, mode;
1898         bool alt;
1899
1900         for(lim = args + narg; args < lim; ++args) {
1901                 if(priv) {
1902                         switch(*args) {
1903                         case 1: /* DECCKM -- Cursor key */
1904                                 MODBIT(term.mode, set, MODE_APPCURSOR);
1905                                 break;
1906                         case 5: /* DECSCNM -- Reverse video */
1907                                 mode = term.mode;
1908                                 MODBIT(term.mode, set, MODE_REVERSE);
1909                                 if(mode != term.mode)
1910                                         redraw();
1911                                 break;
1912                         case 6: /* DECOM -- Origin */
1913                                 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1914                                 tmoveato(0, 0);
1915                                 break;
1916                         case 7: /* DECAWM -- Auto wrap */
1917                                 MODBIT(term.mode, set, MODE_WRAP);
1918                                 break;
1919                         case 0:  /* Error (IGNORED) */
1920                         case 2:  /* DECANM -- ANSI/VT52 (IGNORED) */
1921                         case 3:  /* DECCOLM -- Column  (IGNORED) */
1922                         case 4:  /* DECSCLM -- Scroll (IGNORED) */
1923                         case 8:  /* DECARM -- Auto repeat (IGNORED) */
1924                         case 18: /* DECPFF -- Printer feed (IGNORED) */
1925                         case 19: /* DECPEX -- Printer extent (IGNORED) */
1926                         case 42: /* DECNRCM -- National characters (IGNORED) */
1927                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
1928                                 break;
1929                         case 25: /* DECTCEM -- Text Cursor Enable Mode */
1930                                 MODBIT(term.mode, !set, MODE_HIDE);
1931                                 break;
1932                         case 9:    /* X10 mouse compatibility mode */
1933                                 xsetpointermotion(0);
1934                                 MODBIT(term.mode, 0, MODE_MOUSE);
1935                                 MODBIT(term.mode, set, MODE_MOUSEX10);
1936                                 break;
1937                         case 1000: /* 1000: report button press */
1938                                 xsetpointermotion(0);
1939                                 MODBIT(term.mode, 0, MODE_MOUSE);
1940                                 MODBIT(term.mode, set, MODE_MOUSEBTN);
1941                                 break;
1942                         case 1002: /* 1002: report motion on button press */
1943                                 xsetpointermotion(0);
1944                                 MODBIT(term.mode, 0, MODE_MOUSE);
1945                                 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1946                                 break;
1947                         case 1003: /* 1003: enable all mouse motions */
1948                                 xsetpointermotion(set);
1949                                 MODBIT(term.mode, 0, MODE_MOUSE);
1950                                 MODBIT(term.mode, set, MODE_MOUSEMANY);
1951                                 break;
1952                         case 1004: /* 1004: send focus events to tty */
1953                                 MODBIT(term.mode, set, MODE_FOCUS);
1954                                 break;
1955                         case 1006: /* 1006: extended reporting mode */
1956                                 MODBIT(term.mode, set, MODE_MOUSESGR);
1957                                 break;
1958                         case 1034:
1959                                 MODBIT(term.mode, set, MODE_8BIT);
1960                                 break;
1961                         case 1049: /* swap screen & set/restore cursor as xterm */
1962                                 if (!allowaltscreen)
1963                                         break;
1964                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1965                                 /* FALLTHROUGH */
1966                         case 47: /* swap screen */
1967                         case 1047:
1968                                 if (!allowaltscreen)
1969                                         break;
1970                                 alt = IS_SET(MODE_ALTSCREEN);
1971                                 if(alt) {
1972                                         tclearregion(0, 0, term.col-1,
1973                                                         term.row-1);
1974                                 }
1975                                 if(set ^ alt) /* set is always 1 or 0 */
1976                                         tswapscreen();
1977                                 if(*args != 1049)
1978                                         break;
1979                                 /* FALLTHROUGH */
1980                         case 1048:
1981                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1982                                 break;
1983                         case 2004: /* 2004: bracketed paste mode */
1984                                 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1985                                 break;
1986                         /* Not implemented mouse modes. See comments there. */
1987                         case 1001: /* mouse highlight mode; can hang the
1988                                       terminal by design when implemented. */
1989                         case 1005: /* UTF-8 mouse mode; will confuse
1990                                       applications not supporting UTF-8
1991                                       and luit. */
1992                         case 1015: /* urxvt mangled mouse mode; incompatible
1993                                       and can be mistaken for other control
1994                                       codes. */
1995                         default:
1996                                 fprintf(stderr,
1997                                         "erresc: unknown private set/reset mode %d\n",
1998                                         *args);
1999                                 break;
2000                         }
2001                 } else {
2002                         switch(*args) {
2003                         case 0:  /* Error (IGNORED) */
2004                                 break;
2005                         case 2:  /* KAM -- keyboard action */
2006                                 MODBIT(term.mode, set, MODE_KBDLOCK);
2007                                 break;
2008                         case 4:  /* IRM -- Insertion-replacement */
2009                                 MODBIT(term.mode, set, MODE_INSERT);
2010                                 break;
2011                         case 12: /* SRM -- Send/Receive */
2012                                 MODBIT(term.mode, !set, MODE_ECHO);
2013                                 break;
2014                         case 20: /* LNM -- Linefeed/new line */
2015                                 MODBIT(term.mode, set, MODE_CRLF);
2016                                 break;
2017                         default:
2018                                 fprintf(stderr,
2019                                         "erresc: unknown set/reset mode %d\n",
2020                                         *args);
2021                                 break;
2022                         }
2023                 }
2024         }
2025 }
2026
2027 void
2028 csihandle(void) {
2029         char buf[40];
2030         int len;
2031
2032         switch(csiescseq.mode[0]) {
2033         default:
2034         unknown:
2035                 fprintf(stderr, "erresc: unknown csi ");
2036                 csidump();
2037                 /* die(""); */
2038                 break;
2039         case '@': /* ICH -- Insert <n> blank char */
2040                 DEFAULT(csiescseq.arg[0], 1);
2041                 tinsertblank(csiescseq.arg[0]);
2042                 break;
2043         case 'A': /* CUU -- Cursor <n> Up */
2044                 DEFAULT(csiescseq.arg[0], 1);
2045                 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2046                 break;
2047         case 'B': /* CUD -- Cursor <n> Down */
2048         case 'e': /* VPR --Cursor <n> Down */
2049                 DEFAULT(csiescseq.arg[0], 1);
2050                 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2051                 break;
2052         case 'i': /* MC -- Media Copy */
2053                 switch(csiescseq.arg[0]) {
2054                 case 0:
2055                         tdump();
2056                         break;
2057                 case 1:
2058                         tdumpline(term.c.y);
2059                         break;
2060                 case 2:
2061                         tdumpsel();
2062                         break;
2063                 case 4:
2064                         term.mode &= ~MODE_PRINT;
2065                         break;
2066                 case 5:
2067                         term.mode |= MODE_PRINT;
2068                         break;
2069                 }
2070                 break;
2071         case 'c': /* DA -- Device Attributes */
2072                 if(csiescseq.arg[0] == 0)
2073                         ttywrite(vtiden, sizeof(vtiden) - 1);
2074                 break;
2075         case 'C': /* CUF -- Cursor <n> Forward */
2076         case 'a': /* HPR -- Cursor <n> Forward */
2077                 DEFAULT(csiescseq.arg[0], 1);
2078                 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2079                 break;
2080         case 'D': /* CUB -- Cursor <n> Backward */
2081                 DEFAULT(csiescseq.arg[0], 1);
2082                 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2083                 break;
2084         case 'E': /* CNL -- Cursor <n> Down and first col */
2085                 DEFAULT(csiescseq.arg[0], 1);
2086                 tmoveto(0, term.c.y+csiescseq.arg[0]);
2087                 break;
2088         case 'F': /* CPL -- Cursor <n> Up and first col */
2089                 DEFAULT(csiescseq.arg[0], 1);
2090                 tmoveto(0, term.c.y-csiescseq.arg[0]);
2091                 break;
2092         case 'g': /* TBC -- Tabulation clear */
2093                 switch(csiescseq.arg[0]) {
2094                 case 0: /* clear current tab stop */
2095                         term.tabs[term.c.x] = 0;
2096                         break;
2097                 case 3: /* clear all the tabs */
2098                         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2099                         break;
2100                 default:
2101                         goto unknown;
2102                 }
2103                 break;
2104         case 'G': /* CHA -- Move to <col> */
2105         case '`': /* HPA */
2106                 DEFAULT(csiescseq.arg[0], 1);
2107                 tmoveto(csiescseq.arg[0]-1, term.c.y);
2108                 break;
2109         case 'H': /* CUP -- Move to <row> <col> */
2110         case 'f': /* HVP */
2111                 DEFAULT(csiescseq.arg[0], 1);
2112                 DEFAULT(csiescseq.arg[1], 1);
2113                 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2114                 break;
2115         case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2116                 DEFAULT(csiescseq.arg[0], 1);
2117                 tputtab(csiescseq.arg[0]);
2118                 break;
2119         case 'J': /* ED -- Clear screen */
2120                 selclear(NULL);
2121                 switch(csiescseq.arg[0]) {
2122                 case 0: /* below */
2123                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2124                         if(term.c.y < term.row-1) {
2125                                 tclearregion(0, term.c.y+1, term.col-1,
2126                                                 term.row-1);
2127                         }
2128                         break;
2129                 case 1: /* above */
2130                         if(term.c.y > 1)
2131                                 tclearregion(0, 0, term.col-1, term.c.y-1);
2132                         tclearregion(0, term.c.y, term.c.x, term.c.y);
2133                         break;
2134                 case 2: /* all */
2135                         tclearregion(0, 0, term.col-1, term.row-1);
2136                         break;
2137                 default:
2138                         goto unknown;
2139                 }
2140                 break;
2141         case 'K': /* EL -- Clear line */
2142                 switch(csiescseq.arg[0]) {
2143                 case 0: /* right */
2144                         tclearregion(term.c.x, term.c.y, term.col-1,
2145                                         term.c.y);
2146                         break;
2147                 case 1: /* left */
2148                         tclearregion(0, term.c.y, term.c.x, term.c.y);
2149                         break;
2150                 case 2: /* all */
2151                         tclearregion(0, term.c.y, term.col-1, term.c.y);
2152                         break;
2153                 }
2154                 break;
2155         case 'S': /* SU -- Scroll <n> line up */
2156                 DEFAULT(csiescseq.arg[0], 1);
2157                 tscrollup(term.top, csiescseq.arg[0]);
2158                 break;
2159         case 'T': /* SD -- Scroll <n> line down */
2160                 DEFAULT(csiescseq.arg[0], 1);
2161                 tscrolldown(term.top, csiescseq.arg[0]);
2162                 break;
2163         case 'L': /* IL -- Insert <n> blank lines */
2164                 DEFAULT(csiescseq.arg[0], 1);
2165                 tinsertblankline(csiescseq.arg[0]);
2166                 break;
2167         case 'l': /* RM -- Reset Mode */
2168                 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2169                 break;
2170         case 'M': /* DL -- Delete <n> lines */
2171                 DEFAULT(csiescseq.arg[0], 1);
2172                 tdeleteline(csiescseq.arg[0]);
2173                 break;
2174         case 'X': /* ECH -- Erase <n> char */
2175                 DEFAULT(csiescseq.arg[0], 1);
2176                 tclearregion(term.c.x, term.c.y,
2177                                 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2178                 break;
2179         case 'P': /* DCH -- Delete <n> char */
2180                 DEFAULT(csiescseq.arg[0], 1);
2181                 tdeletechar(csiescseq.arg[0]);
2182                 break;
2183         case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2184                 DEFAULT(csiescseq.arg[0], 1);
2185                 tputtab(-csiescseq.arg[0]);
2186                 break;
2187         case 'd': /* VPA -- Move to <row> */
2188                 DEFAULT(csiescseq.arg[0], 1);
2189                 tmoveato(term.c.x, csiescseq.arg[0]-1);
2190                 break;
2191         case 'h': /* SM -- Set terminal mode */
2192                 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2193                 break;
2194         case 'm': /* SGR -- Terminal attribute (color) */
2195                 tsetattr(csiescseq.arg, csiescseq.narg);
2196                 break;
2197         case 'n': /* DSR – Device Status Report (cursor position) */
2198                 if (csiescseq.arg[0] == 6) {
2199                         len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2200                                         term.c.y+1, term.c.x+1);
2201                         ttywrite(buf, len);
2202                 }
2203                 break;
2204         case 'r': /* DECSTBM -- Set Scrolling Region */
2205                 if(csiescseq.priv) {
2206                         goto unknown;
2207                 } else {
2208                         DEFAULT(csiescseq.arg[0], 1);
2209                         DEFAULT(csiescseq.arg[1], term.row);
2210                         tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2211                         tmoveato(0, 0);
2212                 }
2213                 break;
2214         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2215                 tcursor(CURSOR_SAVE);
2216                 break;
2217         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2218                 tcursor(CURSOR_LOAD);
2219                 break;
2220         case ' ':
2221                 switch (csiescseq.mode[1]) {
2222                         case 'q': /* DECSCUSR -- Set Cursor Style */
2223                                 DEFAULT(csiescseq.arg[0], 1);
2224                                 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2225                                         goto unknown;
2226                                 }
2227                                 xw.cursor = csiescseq.arg[0];
2228                                 break;
2229                         default:
2230                                 goto unknown;
2231                 }
2232                 break;
2233         }
2234 }
2235
2236 void
2237 csidump(void) {
2238         int i;
2239         uint c;
2240
2241         printf("ESC[");
2242         for(i = 0; i < csiescseq.len; i++) {
2243                 c = csiescseq.buf[i] & 0xff;
2244                 if(isprint(c)) {
2245                         putchar(c);
2246                 } else if(c == '\n') {
2247                         printf("(\\n)");
2248                 } else if(c == '\r') {
2249                         printf("(\\r)");
2250                 } else if(c == 0x1b) {
2251                         printf("(\\e)");
2252                 } else {
2253                         printf("(%02x)", c);
2254                 }
2255         }
2256         putchar('\n');
2257 }
2258
2259 void
2260 csireset(void) {
2261         memset(&csiescseq, 0, sizeof(csiescseq));
2262 }
2263
2264 void
2265 strhandle(void) {
2266         char *p = NULL;
2267         int j, narg, par;
2268
2269         term.esc &= ~(ESC_STR_END|ESC_STR);
2270         strparse();
2271         par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2272
2273         switch(strescseq.type) {
2274         case ']': /* OSC -- Operating System Command */
2275                 switch(par) {
2276                 case 0:
2277                 case 1:
2278                 case 2:
2279                         if(narg > 1)
2280                                 xsettitle(strescseq.args[1]);
2281                         return;
2282                 case 4: /* color set */
2283                         if(narg < 3)
2284                                 break;
2285                         p = strescseq.args[2];
2286                         /* FALLTHROUGH */
2287                 case 104: /* color reset, here p = NULL */
2288                         j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2289                         if(xsetcolorname(j, p)) {
2290                                 fprintf(stderr, "erresc: invalid color %s\n", p);
2291                         } else {
2292                                 /*
2293                                  * TODO if defaultbg color is changed, borders
2294                                  * are dirty
2295                                  */
2296                                 redraw();
2297                         }
2298                         return;
2299                 }
2300                 break;
2301         case 'k': /* old title set compatibility */
2302                 xsettitle(strescseq.args[0]);
2303                 return;
2304         case 'P': /* DCS -- Device Control String */
2305         case '_': /* APC -- Application Program Command */
2306         case '^': /* PM -- Privacy Message */
2307                 return;
2308         }
2309
2310         fprintf(stderr, "erresc: unknown str ");
2311         strdump();
2312 }
2313
2314 void
2315 strparse(void) {
2316         int c;
2317         char *p = strescseq.buf;
2318
2319         strescseq.narg = 0;
2320         strescseq.buf[strescseq.len] = '\0';
2321
2322         if(*p == '\0')
2323                 return;
2324
2325         while(strescseq.narg < STR_ARG_SIZ) {
2326                 strescseq.args[strescseq.narg++] = p;
2327                 while((c = *p) != ';' && c != '\0')
2328                         ++p;
2329                 if(c == '\0')
2330                         return;
2331                 *p++ = '\0';
2332         }
2333 }
2334
2335 void
2336 strdump(void) {
2337         int i;
2338         uint c;
2339
2340         printf("ESC%c", strescseq.type);
2341         for(i = 0; i < strescseq.len; i++) {
2342                 c = strescseq.buf[i] & 0xff;
2343                 if(c == '\0') {
2344                         return;
2345                 } else if(isprint(c)) {
2346                         putchar(c);
2347                 } else if(c == '\n') {
2348                         printf("(\\n)");
2349                 } else if(c == '\r') {
2350                         printf("(\\r)");
2351                 } else if(c == 0x1b) {
2352                         printf("(\\e)");
2353                 } else {
2354                         printf("(%02x)", c);
2355                 }
2356         }
2357         printf("ESC\\\n");
2358 }
2359
2360 void
2361 strreset(void) {
2362         memset(&strescseq, 0, sizeof(strescseq));
2363 }
2364
2365 void
2366 tprinter(char *s, size_t len) {
2367         if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2368                 fprintf(stderr, "Error writing in %s:%s\n",
2369                         opt_io, strerror(errno));
2370                 close(iofd);
2371                 iofd = -1;
2372         }
2373 }
2374
2375 void
2376 toggleprinter(const Arg *arg) {
2377         term.mode ^= MODE_PRINT;
2378 }
2379
2380 void
2381 printscreen(const Arg *arg) {
2382         tdump();
2383 }
2384
2385 void
2386 printsel(const Arg *arg) {
2387         tdumpsel();
2388 }
2389
2390 void
2391 tdumpsel(void) {
2392         char *ptr;
2393
2394         if((ptr = getsel())) {
2395                 tprinter(ptr, strlen(ptr));
2396                 free(ptr);
2397         }
2398 }
2399
2400 void
2401 tdumpline(int n) {
2402         Glyph *bp, *end;
2403
2404         bp = &term.line[n][0];
2405         end = &bp[MIN(tlinelen(n), term.col) - 1];
2406         if(bp != end || bp->c[0] != ' ') {
2407                 for( ;bp <= end; ++bp)
2408                         tprinter(bp->c, utf8len(bp->c));
2409         }
2410         tprinter("\n", 1);
2411 }
2412
2413 void
2414 tdump(void) {
2415         int i;
2416
2417         for(i = 0; i < term.row; ++i)
2418                 tdumpline(i);
2419 }
2420
2421 void
2422 tputtab(int n) {
2423         uint x = term.c.x;
2424
2425         if(n > 0) {
2426                 while(x < term.col && n--)
2427                         for(++x; x < term.col && !term.tabs[x]; ++x)
2428                                 /* nothing */ ;
2429         } else if(n < 0) {
2430                 while(x > 0 && n++)
2431                         for(--x; x > 0 && !term.tabs[x]; --x)
2432                                 /* nothing */ ;
2433         }
2434         term.c.x = LIMIT(x, 0, term.col-1);
2435 }
2436
2437 void
2438 techo(char *buf, int len) {
2439         for(; len > 0; buf++, len--) {
2440                 char c = *buf;
2441
2442                 if(ISCONTROL((uchar) c)) { /* control code */
2443                         if(c & 0x80) {
2444                                 c &= 0x7f;
2445                                 tputc("^", 1);
2446                                 tputc("[", 1);
2447                         } else if(c != '\n' && c != '\r' && c != '\t') {
2448                                 c ^= 0x40;
2449                                 tputc("^", 1);
2450                         }
2451                         tputc(&c, 1);
2452                 } else {
2453                         break;
2454                 }
2455         }
2456         if(len)
2457                 tputc(buf, len);
2458 }
2459
2460 void
2461 tdeftran(char ascii) {
2462         static char cs[] = "0B";
2463         static int vcs[] = {CS_GRAPHIC0, CS_USA};
2464         char *p;
2465
2466         if((p = strchr(cs, ascii)) == NULL) {
2467                 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2468         } else {
2469                 term.trantbl[term.icharset] = vcs[p - cs];
2470         }
2471 }
2472
2473 void
2474 tdectest(char c) {
2475         static char E[UTF_SIZ] = "E";
2476         int x, y;
2477
2478         if(c == '8') { /* DEC screen alignment test. */
2479                 for(x = 0; x < term.col; ++x) {
2480                         for(y = 0; y < term.row; ++y)
2481                                 tsetchar(E, &term.c.attr, x, y);
2482                 }
2483         }
2484 }
2485
2486 void
2487 tstrsequence(uchar c) {
2488         switch (c) {
2489         case 0x90:   /* DCS -- Device Control String */
2490                 c = 'P';
2491                 break;
2492         case 0x9f:   /* APC -- Application Program Command */
2493                 c = '_';
2494                 break;
2495         case 0x9e:   /* PM -- Privacy Message */
2496                 c = '^';
2497                 break;
2498         case 0x9d:   /* OSC -- Operating System Command */
2499                 c = ']';
2500                 break;
2501         }
2502         strreset();
2503         strescseq.type = c;
2504         term.esc |= ESC_STR;
2505 }
2506
2507 void
2508 tcontrolcode(uchar ascii) {
2509         static char question[UTF_SIZ] = "?";
2510
2511         switch(ascii) {
2512         case '\t':   /* HT */
2513                 tputtab(1);
2514                 return;
2515         case '\b':   /* BS */
2516                 tmoveto(term.c.x-1, term.c.y);
2517                 return;
2518         case '\r':   /* CR */
2519                 tmoveto(0, term.c.y);
2520                 return;
2521         case '\f':   /* LF */
2522         case '\v':   /* VT */
2523         case '\n':   /* LF */
2524                 /* go to first col if the mode is set */
2525                 tnewline(IS_SET(MODE_CRLF));
2526                 return;
2527         case '\a':   /* BEL */
2528                 if(term.esc & ESC_STR_END) {
2529                         /* backwards compatibility to xterm */
2530                         strhandle();
2531                 } else {
2532                         if(!(xw.state & WIN_FOCUSED))
2533                                 xseturgency(1);
2534                         if (bellvolume)
2535                                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2536                 }
2537                 break;
2538         case '\033': /* ESC */
2539                 csireset();
2540                 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2541                 term.esc |= ESC_START;
2542                 return;
2543         case '\016': /* SO (LS1 -- Locking shift 1) */
2544         case '\017': /* SI (LS0 -- Locking shift 0) */
2545                 term.charset = 1 - (ascii - '\016');
2546                 return;
2547         case '\032': /* SUB */
2548                 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2549         case '\030': /* CAN */
2550                 csireset();
2551                 break;
2552         case '\005': /* ENQ (IGNORED) */
2553         case '\000': /* NUL (IGNORED) */
2554         case '\021': /* XON (IGNORED) */
2555         case '\023': /* XOFF (IGNORED) */
2556         case 0177:   /* DEL (IGNORED) */
2557                 return;
2558         case 0x84:   /* TODO: IND */
2559                 break;
2560         case 0x85:   /* NEL -- Next line */
2561                 tnewline(1); /* always go to first col */
2562                 break;
2563         case 0x88:   /* HTS -- Horizontal tab stop */
2564                 term.tabs[term.c.x] = 1;
2565                 break;
2566         case 0x8d:   /* TODO: RI */
2567         case 0x8e:   /* TODO: SS2 */
2568         case 0x8f:   /* TODO: SS3 */
2569         case 0x98:   /* TODO: SOS */
2570                 break;
2571         case 0x9a:   /* DECID -- Identify Terminal */
2572                 ttywrite(vtiden, sizeof(vtiden) - 1);
2573                 break;
2574         case 0x9b:   /* TODO: CSI */
2575         case 0x9c:   /* TODO: ST */
2576                 break;
2577         case 0x90:   /* DCS -- Device Control String */
2578         case 0x9f:   /* APC -- Application Program Command */
2579         case 0x9e:   /* PM -- Privacy Message */
2580         case 0x9d:   /* OSC -- Operating System Command */
2581                 tstrsequence(ascii);
2582                 return;
2583         }
2584         /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2585         term.esc &= ~(ESC_STR_END|ESC_STR);
2586 }
2587
2588 /*
2589  * returns 1 when the sequence is finished and it hasn't to read
2590  * more characters for this sequence, otherwise 0
2591  */
2592 int
2593 eschandle(uchar ascii) {
2594         switch(ascii) {
2595         case '[':
2596                 term.esc |= ESC_CSI;
2597                 return 0;
2598         case '#':
2599                 term.esc |= ESC_TEST;
2600                 return 0;
2601         case 'P': /* DCS -- Device Control String */
2602         case '_': /* APC -- Application Program Command */
2603         case '^': /* PM -- Privacy Message */
2604         case ']': /* OSC -- Operating System Command */
2605         case 'k': /* old title set compatibility */
2606                 tstrsequence(ascii);
2607                 return 0;
2608         case 'n': /* LS2 -- Locking shift 2 */
2609         case 'o': /* LS3 -- Locking shift 3 */
2610                 term.charset = 2 + (ascii - 'n');
2611                 break;
2612         case '(': /* GZD4 -- set primary charset G0 */
2613         case ')': /* G1D4 -- set secondary charset G1 */
2614         case '*': /* G2D4 -- set tertiary charset G2 */
2615         case '+': /* G3D4 -- set quaternary charset G3 */
2616                 term.icharset = ascii - '(';
2617                 term.esc |= ESC_ALTCHARSET;
2618                 return 0;
2619         case 'D': /* IND -- Linefeed */
2620                 if(term.c.y == term.bot) {
2621                         tscrollup(term.top, 1);
2622                 } else {
2623                         tmoveto(term.c.x, term.c.y+1);
2624                 }
2625                 break;
2626         case 'E': /* NEL -- Next line */
2627                 tnewline(1); /* always go to first col */
2628                 break;
2629         case 'H': /* HTS -- Horizontal tab stop */
2630                 term.tabs[term.c.x] = 1;
2631                 break;
2632         case 'M': /* RI -- Reverse index */
2633                 if(term.c.y == term.top) {
2634                         tscrolldown(term.top, 1);
2635                 } else {
2636                         tmoveto(term.c.x, term.c.y-1);
2637                 }
2638                 break;
2639         case 'Z': /* DECID -- Identify Terminal */
2640                 ttywrite(vtiden, sizeof(vtiden) - 1);
2641                 break;
2642         case 'c': /* RIS -- Reset to inital state */
2643                 treset();
2644                 xresettitle();
2645                 xloadcols();
2646                 break;
2647         case '=': /* DECPAM -- Application keypad */
2648                 term.mode |= MODE_APPKEYPAD;
2649                 break;
2650         case '>': /* DECPNM -- Normal keypad */
2651                 term.mode &= ~MODE_APPKEYPAD;
2652                 break;
2653         case '7': /* DECSC -- Save Cursor */
2654                 tcursor(CURSOR_SAVE);
2655                 break;
2656         case '8': /* DECRC -- Restore Cursor */
2657                 tcursor(CURSOR_LOAD);
2658                 break;
2659         case '\\': /* ST -- String Terminator */
2660                 if(term.esc & ESC_STR_END)
2661                         strhandle();
2662                 break;
2663         default:
2664                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2665                         (uchar) ascii, isprint(ascii)? ascii:'.');
2666                 break;
2667         }
2668         return 1;
2669 }
2670
2671 void
2672 tputc(char *c, int len) {
2673         uchar ascii;
2674         bool control;
2675         long unicodep;
2676         int width;
2677         Glyph *gp;
2678
2679         if(len == 1) {
2680                 width = 1;
2681                 unicodep = ascii = *c;
2682         } else {
2683                 utf8decode(c, &unicodep, UTF_SIZ);
2684                 if ((width = wcwidth(unicodep)) == -1) {
2685                         c = "\357\277\275";     /* UTF_INVALID */
2686                         width = 1;
2687                 }
2688                 ascii = unicodep;
2689         }
2690
2691         if(IS_SET(MODE_PRINT))
2692                 tprinter(c, len);
2693         control = ISCONTROL(unicodep);
2694
2695         /*
2696          * STR sequence must be checked before anything else
2697          * because it uses all following characters until it
2698          * receives a ESC, a SUB, a ST or any other C1 control
2699          * character.
2700          */
2701         if(term.esc & ESC_STR) {
2702                 if(len == 1 &&
2703                    (ascii == '\a' || ascii == 030 ||
2704                     ascii == 032  || ascii == 033 ||
2705                     ISCONTROLC1(unicodep))) {
2706                         term.esc &= ~(ESC_START|ESC_STR);
2707                         term.esc |= ESC_STR_END;
2708                 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2709                         memmove(&strescseq.buf[strescseq.len], c, len);
2710                         strescseq.len += len;
2711                         return;
2712                 } else {
2713                 /*
2714                  * Here is a bug in terminals. If the user never sends
2715                  * some code to stop the str or esc command, then st
2716                  * will stop responding. But this is better than
2717                  * silently failing with unknown characters. At least
2718                  * then users will report back.
2719                  *
2720                  * In the case users ever get fixed, here is the code:
2721                  */
2722                 /*
2723                  * term.esc = 0;
2724                  * strhandle();
2725                  */
2726                         return;
2727                 }
2728         }
2729
2730         /*
2731          * Actions of control codes must be performed as soon they arrive
2732          * because they can be embedded inside a control sequence, and
2733          * they must not cause conflicts with sequences.
2734          */
2735         if(control) {
2736                 tcontrolcode(ascii);
2737                 /*
2738                  * control codes are not shown ever
2739                  */
2740                 return;
2741         } else if(term.esc & ESC_START) {
2742                 if(term.esc & ESC_CSI) {
2743                         csiescseq.buf[csiescseq.len++] = ascii;
2744                         if(BETWEEN(ascii, 0x40, 0x7E)
2745                                         || csiescseq.len >= \
2746                                         sizeof(csiescseq.buf)-1) {
2747                                 term.esc = 0;
2748                                 csiparse();
2749                                 csihandle();
2750                         }
2751                         return;
2752                 } else if(term.esc & ESC_ALTCHARSET) {
2753                         tdeftran(ascii);
2754                 } else if(term.esc & ESC_TEST) {
2755                         tdectest(ascii);
2756                 } else {
2757                         if (!eschandle(ascii))
2758                                 return;
2759                         /* sequence already finished */
2760                 }
2761                 term.esc = 0;
2762                 /*
2763                  * All characters which form part of a sequence are not
2764                  * printed
2765                  */
2766                 return;
2767         }
2768         if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2769                 selclear(NULL);
2770
2771         gp = &term.line[term.c.y][term.c.x];
2772         if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2773                 gp->mode |= ATTR_WRAP;
2774                 tnewline(1);
2775                 gp = &term.line[term.c.y][term.c.x];
2776         }
2777
2778         if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2779                 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2780
2781         if(term.c.x+width > term.col) {
2782                 tnewline(1);
2783                 gp = &term.line[term.c.y][term.c.x];
2784         }
2785
2786         tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2787
2788         if(width == 2) {
2789                 gp->mode |= ATTR_WIDE;
2790                 if(term.c.x+1 < term.col) {
2791                         gp[1].c[0] = '\0';
2792                         gp[1].mode = ATTR_WDUMMY;
2793                 }
2794         }
2795         if(term.c.x+width < term.col) {
2796                 tmoveto(term.c.x+width, term.c.y);
2797         } else {
2798                 term.c.state |= CURSOR_WRAPNEXT;
2799         }
2800 }
2801
2802 void
2803 tresize(int col, int row) {
2804         int i;
2805         int minrow = MIN(row, term.row);
2806         int mincol = MIN(col, term.col);
2807         bool *bp;
2808         TCursor c;
2809
2810         if(col < 1 || row < 1) {
2811                 fprintf(stderr,
2812                         "tresize: error resizing to %dx%d\n", col, row);
2813                 return;
2814         }
2815
2816         /*
2817          * slide screen to keep cursor where we expect it -
2818          * tscrollup would work here, but we can optimize to
2819          * memmove because we're freeing the earlier lines
2820          */
2821         for(i = 0; i <= term.c.y - row; i++) {
2822                 free(term.line[i]);
2823                 free(term.alt[i]);
2824         }
2825         /* ensure that both src and dst are not NULL */
2826         if (i > 0) {
2827                 memmove(term.line, term.line + i, row * sizeof(Line));
2828                 memmove(term.alt, term.alt + i, row * sizeof(Line));
2829         }
2830         for(i += row; i < term.row; i++) {
2831                 free(term.line[i]);
2832                 free(term.alt[i]);
2833         }
2834
2835         /* resize to new height */
2836         term.line = xrealloc(term.line, row * sizeof(Line));
2837         term.alt  = xrealloc(term.alt,  row * sizeof(Line));
2838         term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2839         term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2840
2841         /* resize each row to new width, zero-pad if needed */
2842         for(i = 0; i < minrow; i++) {
2843                 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2844                 term.alt[i]  = xrealloc(term.alt[i],  col * sizeof(Glyph));
2845         }
2846
2847         /* allocate any new rows */
2848         for(/* i == minrow */; i < row; i++) {
2849                 term.line[i] = xmalloc(col * sizeof(Glyph));
2850                 term.alt[i] = xmalloc(col * sizeof(Glyph));
2851         }
2852         if(col > term.col) {
2853                 bp = term.tabs + term.col;
2854
2855                 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2856                 while(--bp > term.tabs && !*bp)
2857                         /* nothing */ ;
2858                 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2859                         *bp = 1;
2860         }
2861         /* update terminal size */
2862         term.col = col;
2863         term.row = row;
2864         /* reset scrolling region */
2865         tsetscroll(0, row-1);
2866         /* make use of the LIMIT in tmoveto */
2867         tmoveto(term.c.x, term.c.y);
2868         /* Clearing both screens (it makes dirty all lines) */
2869         c = term.c;
2870         for(i = 0; i < 2; i++) {
2871                 if(mincol < col && 0 < minrow) {
2872                         tclearregion(mincol, 0, col - 1, minrow - 1);
2873                 }
2874                 if(0 < col && minrow < row) {
2875                         tclearregion(0, minrow, col - 1, row - 1);
2876                 }
2877                 tswapscreen();
2878                 tcursor(CURSOR_LOAD);
2879         }
2880         term.c = c;
2881 }
2882
2883 void
2884 xresize(int col, int row) {
2885         xw.tw = MAX(1, col * xw.cw);
2886         xw.th = MAX(1, row * xw.ch);
2887
2888         XFreePixmap(xw.dpy, xw.buf);
2889         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2890                         DefaultDepth(xw.dpy, xw.scr));
2891         XftDrawChange(xw.draw, xw.buf);
2892         xclear(0, 0, xw.w, xw.h);
2893 }
2894
2895 ushort
2896 sixd_to_16bit(int x) {
2897         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2898 }
2899
2900 bool
2901 xloadcolor(int i, const char *name, Color *ncolor) {
2902         XRenderColor color = { .alpha = 0xffff };
2903
2904         if(!name) {
2905                 if(BETWEEN(i, 16, 255)) { /* 256 color */
2906                         if(i < 6*6*6+16) { /* same colors as xterm */
2907                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
2908                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2909                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
2910                         } else { /* greyscale */
2911                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
2912                                 color.green = color.blue = color.red;
2913                         }
2914                         return XftColorAllocValue(xw.dpy, xw.vis,
2915                                                   xw.cmap, &color, ncolor);
2916                 } else
2917                         name = colorname[i];
2918         }
2919         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
2920 }
2921
2922 void
2923 xloadcols(void) {
2924         int i;
2925         static bool loaded;
2926         Color *cp;
2927
2928         if(loaded) {
2929                 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
2930                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2931         }
2932
2933         for(i = 0; i < LEN(dc.col); i++)
2934                 if(!xloadcolor(i, NULL, &dc.col[i])) {
2935                         if(colorname[i])
2936                                 die("Could not allocate color '%s'\n", colorname[i]);
2937                         else
2938                                 die("Could not allocate color %d\n", i);
2939                 }
2940         loaded = true;
2941 }
2942
2943 int
2944 xsetcolorname(int x, const char *name) {
2945         Color ncolor;
2946
2947         if(!BETWEEN(x, 0, LEN(dc.col)))
2948                 return 1;
2949
2950
2951         if(!xloadcolor(x, name, &ncolor))
2952                 return 1;
2953
2954         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2955         dc.col[x] = ncolor;
2956         return 0;
2957 }
2958
2959 void
2960 xtermclear(int col1, int row1, int col2, int row2) {
2961         XftDrawRect(xw.draw,
2962                         &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2963                         borderpx + col1 * xw.cw,
2964                         borderpx + row1 * xw.ch,
2965                         (col2-col1+1) * xw.cw,
2966                         (row2-row1+1) * xw.ch);
2967 }
2968
2969 /*
2970  * Absolute coordinates.
2971  */
2972 void
2973 xclear(int x1, int y1, int x2, int y2) {
2974         XftDrawRect(xw.draw,
2975                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2976                         x1, y1, x2-x1, y2-y1);
2977 }
2978
2979 void
2980 xhints(void) {
2981         XClassHint class = {opt_class ? opt_class : termname, termname};
2982         XWMHints wm = {.flags = InputHint, .input = 1};
2983         XSizeHints *sizeh = NULL;
2984
2985         sizeh = XAllocSizeHints();
2986
2987         sizeh->flags = PSize | PResizeInc | PBaseSize;
2988         sizeh->height = xw.h;
2989         sizeh->width = xw.w;
2990         sizeh->height_inc = xw.ch;
2991         sizeh->width_inc = xw.cw;
2992         sizeh->base_height = 2 * borderpx;
2993         sizeh->base_width = 2 * borderpx;
2994         if(xw.isfixed == True) {
2995                 sizeh->flags |= PMaxSize | PMinSize;
2996                 sizeh->min_width = sizeh->max_width = xw.w;
2997                 sizeh->min_height = sizeh->max_height = xw.h;
2998         }
2999         if(xw.gm & (XValue|YValue)) {
3000                 sizeh->flags |= USPosition | PWinGravity;
3001                 sizeh->x = xw.l;
3002                 sizeh->y = xw.t;
3003                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
3004         }
3005
3006         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
3007                         &class);
3008         XFree(sizeh);
3009 }
3010
3011 int
3012 xgeommasktogravity(int mask) {
3013         switch(mask & (XNegative|YNegative)) {
3014         case 0:
3015                 return NorthWestGravity;
3016         case XNegative:
3017                 return NorthEastGravity;
3018         case YNegative:
3019                 return SouthWestGravity;
3020         }
3021         return SouthEastGravity;
3022 }
3023
3024 int
3025 xloadfont(Font *f, FcPattern *pattern) {
3026         FcPattern *match;
3027         FcResult result;
3028
3029         match = FcFontMatch(NULL, pattern, &result);
3030         if(!match)
3031                 return 1;
3032
3033         if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3034                 FcPatternDestroy(match);
3035                 return 1;
3036         }
3037
3038         f->set = NULL;
3039         f->pattern = FcPatternDuplicate(pattern);
3040
3041         f->ascent = f->match->ascent;
3042         f->descent = f->match->descent;
3043         f->lbearing = 0;
3044         f->rbearing = f->match->max_advance_width;
3045
3046         f->height = f->ascent + f->descent;
3047         f->width = f->lbearing + f->rbearing;
3048
3049         return 0;
3050 }
3051
3052 void
3053 xloadfonts(char *fontstr, double fontsize) {
3054         FcPattern *pattern;
3055         FcResult r_sz, r_psz;
3056         double fontval;
3057         float ceilf(float);
3058
3059         if(fontstr[0] == '-') {
3060                 pattern = XftXlfdParse(fontstr, False, False);
3061         } else {
3062                 pattern = FcNameParse((FcChar8 *)fontstr);
3063         }
3064
3065         if(!pattern)
3066                 die("st: can't open font %s\n", fontstr);
3067
3068         if(fontsize > 1) {
3069                 FcPatternDel(pattern, FC_PIXEL_SIZE);
3070                 FcPatternDel(pattern, FC_SIZE);
3071                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3072                 usedfontsize = fontsize;
3073         } else {
3074                 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3075                 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3076                 if(r_psz == FcResultMatch) {
3077                         usedfontsize = fontval;
3078                 } else if(r_sz == FcResultMatch) {
3079                         usedfontsize = -1;
3080                 } else {
3081                         /*
3082                          * Default font size is 12, if none given. This is to
3083                          * have a known usedfontsize value.
3084                          */
3085                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3086                         usedfontsize = 12;
3087                 }
3088                 defaultfontsize = usedfontsize;
3089         }
3090
3091         FcConfigSubstitute(0, pattern, FcMatchPattern);
3092         FcDefaultSubstitute(pattern);
3093
3094         if(xloadfont(&dc.font, pattern))
3095                 die("st: can't open font %s\n", fontstr);
3096
3097         if(usedfontsize < 0) {
3098                 FcPatternGetDouble(dc.font.match->pattern,
3099                                    FC_PIXEL_SIZE, 0, &fontval);
3100                 usedfontsize = fontval;
3101                 if(fontsize == 0)
3102                         defaultfontsize = fontval;
3103         }
3104
3105         /* Setting character width and height. */
3106         xw.cw = ceilf(dc.font.width * cwscale);
3107         xw.ch = ceilf(dc.font.height * chscale);
3108
3109         FcPatternDel(pattern, FC_SLANT);
3110         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3111         if(xloadfont(&dc.ifont, pattern))
3112                 die("st: can't open font %s\n", fontstr);
3113
3114         FcPatternDel(pattern, FC_WEIGHT);
3115         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3116         if(xloadfont(&dc.ibfont, pattern))
3117                 die("st: can't open font %s\n", fontstr);
3118
3119         FcPatternDel(pattern, FC_SLANT);
3120         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3121         if(xloadfont(&dc.bfont, pattern))
3122                 die("st: can't open font %s\n", fontstr);
3123
3124         FcPatternDestroy(pattern);
3125 }
3126
3127 void
3128 xunloadfont(Font *f) {
3129         XftFontClose(xw.dpy, f->match);
3130         FcPatternDestroy(f->pattern);
3131         if(f->set)
3132                 FcFontSetDestroy(f->set);
3133 }
3134
3135 void
3136 xunloadfonts(void) {
3137         /* Free the loaded fonts in the font cache.  */
3138         while(frclen > 0)
3139                 XftFontClose(xw.dpy, frc[--frclen].font);
3140
3141         xunloadfont(&dc.font);
3142         xunloadfont(&dc.bfont);
3143         xunloadfont(&dc.ifont);
3144         xunloadfont(&dc.ibfont);
3145 }
3146
3147 void
3148 xzoom(const Arg *arg) {
3149         Arg larg;
3150
3151         larg.i = usedfontsize + arg->i;
3152         xzoomabs(&larg);
3153 }
3154
3155 void
3156 xzoomabs(const Arg *arg) {
3157         xunloadfonts();
3158         xloadfonts(usedfont, arg->i);
3159         cresize(0, 0);
3160         redraw();
3161         xhints();
3162 }
3163
3164 void
3165 xzoomreset(const Arg *arg) {
3166         Arg larg;
3167
3168         if(defaultfontsize > 0) {
3169                 larg.i = defaultfontsize;
3170                 xzoomabs(&larg);
3171         }
3172 }
3173
3174 void
3175 xinit(void) {
3176         XGCValues gcvalues;
3177         Cursor cursor;
3178         Window parent;
3179         pid_t thispid = getpid();
3180
3181         if(!(xw.dpy = XOpenDisplay(NULL)))
3182                 die("Can't open display\n");
3183         xw.scr = XDefaultScreen(xw.dpy);
3184         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3185
3186         /* font */
3187         if(!FcInit())
3188                 die("Could not init fontconfig.\n");
3189
3190         usedfont = (opt_font == NULL)? font : opt_font;
3191         xloadfonts(usedfont, 0);
3192
3193         /* colors */
3194         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3195         xloadcols();
3196
3197         /* adjust fixed window geometry */
3198         xw.w = 2 * borderpx + term.col * xw.cw;
3199         xw.h = 2 * borderpx + term.row * xw.ch;
3200         if(xw.gm & XNegative)
3201                 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3202         if(xw.gm & YNegative)
3203                 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3204
3205         /* Events */
3206         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3207         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3208         xw.attrs.bit_gravity = NorthWestGravity;
3209         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3210                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3211                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3212         xw.attrs.colormap = xw.cmap;
3213
3214         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3215                 parent = XRootWindow(xw.dpy, xw.scr);
3216         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3217                         xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3218                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3219                         | CWEventMask | CWColormap, &xw.attrs);
3220
3221         memset(&gcvalues, 0, sizeof(gcvalues));
3222         gcvalues.graphics_exposures = False;
3223         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3224                         &gcvalues);
3225         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3226                         DefaultDepth(xw.dpy, xw.scr));
3227         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3228         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3229
3230         /* Xft rendering context */
3231         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3232
3233         /* input methods */
3234         if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3235                 XSetLocaleModifiers("@im=local");
3236                 if((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3237                         XSetLocaleModifiers("@im=");
3238                         if((xw.xim = XOpenIM(xw.dpy,
3239                                         NULL, NULL, NULL)) == NULL) {
3240                                 die("XOpenIM failed. Could not open input"
3241                                         " device.\n");
3242                         }
3243                 }
3244         }
3245         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3246                                            | XIMStatusNothing, XNClientWindow, xw.win,
3247                                            XNFocusWindow, xw.win, NULL);
3248         if(xw.xic == NULL)
3249                 die("XCreateIC failed. Could not obtain input method.\n");
3250
3251         /* white cursor, black outline */
3252         cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3253         XDefineCursor(xw.dpy, xw.win, cursor);
3254         XRecolorCursor(xw.dpy, cursor,
3255                 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3256                 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3257
3258         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3259         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3260         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3261         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3262
3263         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3264         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3265                         PropModeReplace, (uchar *)&thispid, 1);
3266
3267         xresettitle();
3268         XMapWindow(xw.dpy, xw.win);
3269         xhints();
3270         XSync(xw.dpy, False);
3271 }
3272
3273 void
3274 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3275         int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3276             width = charlen * xw.cw, xp, i;
3277         int frcflags, charexists;
3278         int u8fl, u8fblen, u8cblen, doesexist;
3279         char *u8c, *u8fs;
3280         long unicodep;
3281         Font *font = &dc.font;
3282         FcResult fcres;
3283         FcPattern *fcpattern, *fontpattern;
3284         FcFontSet *fcsets[] = { NULL };
3285         FcCharSet *fccharset;
3286         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3287         XRenderColor colfg, colbg;
3288         XRectangle r;
3289         int oneatatime;
3290
3291         frcflags = FRC_NORMAL;
3292
3293         if(base.mode & ATTR_ITALIC) {
3294                 if(base.fg == defaultfg)
3295                         base.fg = defaultitalic;
3296                 font = &dc.ifont;
3297                 frcflags = FRC_ITALIC;
3298         } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3299                 if(base.fg == defaultfg)
3300                         base.fg = defaultitalic;
3301                 font = &dc.ibfont;
3302                 frcflags = FRC_ITALICBOLD;
3303         } else if(base.mode & ATTR_UNDERLINE) {
3304                 if(base.fg == defaultfg)
3305                         base.fg = defaultunderline;
3306         }
3307
3308         if(IS_TRUECOL(base.fg)) {
3309                 colfg.alpha = 0xffff;
3310                 colfg.red = TRUERED(base.fg);
3311                 colfg.green = TRUEGREEN(base.fg);
3312                 colfg.blue = TRUEBLUE(base.fg);
3313                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3314                 fg = &truefg;
3315         } else {
3316                 fg = &dc.col[base.fg];
3317         }
3318
3319         if(IS_TRUECOL(base.bg)) {
3320                 colbg.alpha = 0xffff;
3321                 colbg.green = TRUEGREEN(base.bg);
3322                 colbg.red = TRUERED(base.bg);
3323                 colbg.blue = TRUEBLUE(base.bg);
3324                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3325                 bg = &truebg;
3326         } else {
3327                 bg = &dc.col[base.bg];
3328         }
3329
3330         if(base.mode & ATTR_BOLD) {
3331                 /*
3332                  * change basic system colors [0-7]
3333                  * to bright system colors [8-15]
3334                  */
3335                 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3336                         fg = &dc.col[base.fg + 8];
3337
3338                 if(base.mode & ATTR_ITALIC) {
3339                         font = &dc.ibfont;
3340                         frcflags = FRC_ITALICBOLD;
3341                 } else {
3342                         font = &dc.bfont;
3343                         frcflags = FRC_BOLD;
3344                 }
3345         }
3346
3347         if(IS_SET(MODE_REVERSE)) {
3348                 if(fg == &dc.col[defaultfg]) {
3349                         fg = &dc.col[defaultbg];
3350                 } else {
3351                         colfg.red = ~fg->color.red;
3352                         colfg.green = ~fg->color.green;
3353                         colfg.blue = ~fg->color.blue;
3354                         colfg.alpha = fg->color.alpha;
3355                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3356                                         &revfg);
3357                         fg = &revfg;
3358                 }
3359
3360                 if(bg == &dc.col[defaultbg]) {
3361                         bg = &dc.col[defaultfg];
3362                 } else {
3363                         colbg.red = ~bg->color.red;
3364                         colbg.green = ~bg->color.green;
3365                         colbg.blue = ~bg->color.blue;
3366                         colbg.alpha = bg->color.alpha;
3367                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3368                                         &revbg);
3369                         bg = &revbg;
3370                 }
3371         }
3372
3373         if(base.mode & ATTR_REVERSE) {
3374                 temp = fg;
3375                 fg = bg;
3376                 bg = temp;
3377         }
3378
3379         if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3380                 colfg.red = fg->color.red / 2;
3381                 colfg.green = fg->color.green / 2;
3382                 colfg.blue = fg->color.blue / 2;
3383                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3384                 fg = &revfg;
3385         }
3386
3387         if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3388                 fg = bg;
3389
3390         if(base.mode & ATTR_INVISIBLE)
3391                 fg = bg;
3392
3393         /* Intelligent cleaning up of the borders. */
3394         if(x == 0) {
3395                 xclear(0, (y == 0)? 0 : winy, borderpx,
3396                         winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3397         }
3398         if(x + charlen >= term.col) {
3399                 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3400                         ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3401         }
3402         if(y == 0)
3403                 xclear(winx, 0, winx + width, borderpx);
3404         if(y == term.row-1)
3405                 xclear(winx, winy + xw.ch, winx + width, xw.h);
3406
3407         /* Clean up the region we want to draw to. */
3408         XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3409
3410         /* Set the clip region because Xft is sometimes dirty. */
3411         r.x = 0;
3412         r.y = 0;
3413         r.height = xw.ch;
3414         r.width = width;
3415         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3416
3417         for(xp = winx; bytelen > 0;) {
3418                 /*
3419                  * Search for the range in the to be printed string of glyphs
3420                  * that are in the main font. Then print that range. If
3421                  * some glyph is found that is not in the font, do the
3422                  * fallback dance.
3423                  */
3424                 u8fs = s;
3425                 u8fblen = 0;
3426                 u8fl = 0;
3427                 oneatatime = font->width != xw.cw;
3428                 for(;;) {
3429                         u8c = s;
3430                         u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3431                         s += u8cblen;
3432                         bytelen -= u8cblen;
3433
3434                         doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3435                         if(doesexist) {
3436                                         u8fl++;
3437                                         u8fblen += u8cblen;
3438                                         if(!oneatatime && bytelen > 0)
3439                                                         continue;
3440                         }
3441
3442                         if(u8fl > 0) {
3443                                 XftDrawStringUtf8(xw.draw, fg,
3444                                                 font->match, xp,
3445                                                 winy + font->ascent,
3446                                                 (FcChar8 *)u8fs,
3447                                                 u8fblen);
3448                                 xp += xw.cw * u8fl;
3449                         }
3450                         break;
3451                 }
3452                 if(doesexist) {
3453                         if(oneatatime)
3454                                 continue;
3455                         break;
3456                 }
3457
3458                 /* Search the font cache. */
3459                 for(i = 0; i < frclen; i++) {
3460                         charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3461                         /* Everything correct. */
3462                         if(charexists && frc[i].flags == frcflags)
3463                                 break;
3464                         /* We got a default font for a not found glyph. */
3465                         if(!charexists && frc[i].flags == frcflags \
3466                                         && frc[i].unicodep == unicodep) {
3467                                 break;
3468                         }
3469                 }
3470
3471                 /* Nothing was found. */
3472                 if(i >= frclen) {
3473                         if(!font->set)
3474                                 font->set = FcFontSort(0, font->pattern,
3475                                                        FcTrue, 0, &fcres);
3476                         fcsets[0] = font->set;
3477
3478                         /*
3479                          * Nothing was found in the cache. Now use
3480                          * some dozen of Fontconfig calls to get the
3481                          * font for one single character.
3482                          *
3483                          * Xft and fontconfig are design failures.
3484                          */
3485                         fcpattern = FcPatternDuplicate(font->pattern);
3486                         fccharset = FcCharSetCreate();
3487
3488                         FcCharSetAddChar(fccharset, unicodep);
3489                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
3490                                         fccharset);
3491                         FcPatternAddBool(fcpattern, FC_SCALABLE,
3492                                         FcTrue);
3493
3494                         FcConfigSubstitute(0, fcpattern,
3495                                         FcMatchPattern);
3496                         FcDefaultSubstitute(fcpattern);
3497
3498                         fontpattern = FcFontSetMatch(0, fcsets, 1,
3499                                         fcpattern, &fcres);
3500
3501                         /*
3502                          * Overwrite or create the new cache entry.
3503                          */
3504                         if(frclen >= LEN(frc)) {
3505                                 frclen = LEN(frc) - 1;
3506                                 XftFontClose(xw.dpy, frc[frclen].font);
3507                                 frc[frclen].unicodep = 0;
3508                         }
3509
3510                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
3511                                         fontpattern);
3512                         frc[frclen].flags = frcflags;
3513                         frc[frclen].unicodep = unicodep;
3514
3515                         i = frclen;
3516                         frclen++;
3517
3518                         FcPatternDestroy(fcpattern);
3519                         FcCharSetDestroy(fccharset);
3520                 }
3521
3522                 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3523                                 xp, winy + frc[i].font->ascent,
3524                                 (FcChar8 *)u8c, u8cblen);
3525
3526                 xp += xw.cw * wcwidth(unicodep);
3527         }
3528
3529         /*
3530          * This is how the loop above actually should be. Why does the
3531          * application have to care about font details?
3532          *
3533          * I have to repeat: Xft and Fontconfig are design failures.
3534          */
3535         /*
3536         XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3537                         winy + font->ascent, (FcChar8 *)s, bytelen);
3538         */
3539
3540         if(base.mode & ATTR_UNDERLINE) {
3541                 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3542                                 width, 1);
3543         }
3544
3545         if(base.mode & ATTR_STRUCK) {
3546                 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3547                                 width, 1);
3548         }
3549
3550         /* Reset clip to none. */
3551         XftDrawSetClip(xw.draw, 0);
3552 }
3553
3554 void
3555 xdrawcursor(void) {
3556         static int oldx = 0, oldy = 0;
3557         int sl, width, curx;
3558         Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3559
3560         LIMIT(oldx, 0, term.col-1);
3561         LIMIT(oldy, 0, term.row-1);
3562
3563         curx = term.c.x;
3564
3565         /* adjust position if in dummy */
3566         if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3567                 oldx--;
3568         if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3569                 curx--;
3570
3571         memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3572
3573         /* remove the old cursor */
3574         sl = utf8len(term.line[oldy][oldx].c);
3575         width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3576         xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3577                         oldy, width, sl);
3578
3579         if(IS_SET(MODE_HIDE))
3580                 return;
3581
3582         /* draw the new one */
3583         if(xw.state & WIN_FOCUSED) {
3584                 switch (xw.cursor) {
3585                         case 0: /* Blinking Block */
3586                         case 1: /* Blinking Block (Default) */
3587                         case 2: /* Steady Block */
3588                                 if(IS_SET(MODE_REVERSE)) {
3589                                                 g.mode |= ATTR_REVERSE;
3590                                                 g.fg = defaultcs;
3591                                                 g.bg = defaultfg;
3592                                         }
3593
3594                                 sl = utf8len(g.c);
3595                                 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3596                                         ? 2 : 1;
3597                                 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3598                                 break;
3599                         case 3: /* Blinking Underline */
3600                         case 4: /* Steady Underline */
3601                                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3602                                                 borderpx + curx * xw.cw,
3603                                                 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3604                                                 xw.cw, cursorthickness);
3605                                 break;
3606                         case 5: /* Blinking bar */
3607                         case 6: /* Steady bar */
3608                                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3609                                                 borderpx + curx * xw.cw,
3610                                                 borderpx + term.c.y * xw.ch,
3611                                                 cursorthickness, xw.ch);
3612                                 break;
3613                 }
3614         } else {
3615                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3616                                 borderpx + curx * xw.cw,
3617                                 borderpx + term.c.y * xw.ch,
3618                                 xw.cw - 1, 1);
3619                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3620                                 borderpx + curx * xw.cw,
3621                                 borderpx + term.c.y * xw.ch,
3622                                 1, xw.ch - 1);
3623                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3624                                 borderpx + (curx + 1) * xw.cw - 1,
3625                                 borderpx + term.c.y * xw.ch,
3626                                 1, xw.ch - 1);
3627                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3628                                 borderpx + curx * xw.cw,
3629                                 borderpx + (term.c.y + 1) * xw.ch - 1,
3630                                 xw.cw, 1);
3631         }
3632         oldx = curx, oldy = term.c.y;
3633 }
3634
3635
3636 void
3637 xsettitle(char *p) {
3638         XTextProperty prop;
3639
3640         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3641                         &prop);
3642         XSetWMName(xw.dpy, xw.win, &prop);
3643         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3644         XFree(prop.value);
3645 }
3646
3647 void
3648 xresettitle(void) {
3649         xsettitle(opt_title ? opt_title : "st");
3650 }
3651
3652 void
3653 redraw(void) {
3654         tfulldirt();
3655         draw();
3656 }
3657
3658 void
3659 draw(void) {
3660         drawregion(0, 0, term.col, term.row);
3661         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3662                         xw.h, 0, 0);
3663         XSetForeground(xw.dpy, dc.gc,
3664                         dc.col[IS_SET(MODE_REVERSE)?
3665                                 defaultfg : defaultbg].pixel);
3666 }
3667
3668 void
3669 drawregion(int x1, int y1, int x2, int y2) {
3670         int ic, ib, x, y, ox, sl;
3671         Glyph base, new;
3672         char buf[DRAW_BUF_SIZ];
3673         bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3674         long unicodep;
3675
3676         if(!(xw.state & WIN_VISIBLE))
3677                 return;
3678
3679         for(y = y1; y < y2; y++) {
3680                 if(!term.dirty[y])
3681                         continue;
3682
3683                 xtermclear(0, y, term.col, y);
3684                 term.dirty[y] = 0;
3685                 base = term.line[y][0];
3686                 ic = ib = ox = 0;
3687                 for(x = x1; x < x2; x++) {
3688                         new = term.line[y][x];
3689                         if(new.mode == ATTR_WDUMMY)
3690                                 continue;
3691                         if(ena_sel && selected(x, y))
3692                                 new.mode ^= ATTR_REVERSE;
3693                         if(ib > 0 && (ATTRCMP(base, new)
3694                                         || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3695                                 xdraws(buf, base, ox, y, ic, ib);
3696                                 ic = ib = 0;
3697                         }
3698                         if(ib == 0) {
3699                                 ox = x;
3700                                 base = new;
3701                         }
3702
3703                         sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3704                         memcpy(buf+ib, new.c, sl);
3705                         ib += sl;
3706                         ic += (new.mode & ATTR_WIDE)? 2 : 1;
3707                 }
3708                 if(ib > 0)
3709                         xdraws(buf, base, ox, y, ic, ib);
3710         }
3711         xdrawcursor();
3712 }
3713
3714 void
3715 expose(XEvent *ev) {
3716         redraw();
3717 }
3718
3719 void
3720 visibility(XEvent *ev) {
3721         XVisibilityEvent *e = &ev->xvisibility;
3722
3723         MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
3724 }
3725
3726 void
3727 unmap(XEvent *ev) {
3728         xw.state &= ~WIN_VISIBLE;
3729 }
3730
3731 void
3732 xsetpointermotion(int set) {
3733         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3734         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3735 }
3736
3737 void
3738 xseturgency(int add) {
3739         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3740
3741         MODBIT(h->flags, add, XUrgencyHint);
3742         XSetWMHints(xw.dpy, xw.win, h);
3743         XFree(h);
3744 }
3745
3746 void
3747 focus(XEvent *ev) {
3748         XFocusChangeEvent *e = &ev->xfocus;
3749
3750         if(e->mode == NotifyGrab)
3751                 return;
3752
3753         if(ev->type == FocusIn) {
3754                 XSetICFocus(xw.xic);
3755                 xw.state |= WIN_FOCUSED;
3756                 xseturgency(0);
3757                 if(IS_SET(MODE_FOCUS))
3758                         ttywrite("\033[I", 3);
3759         } else {
3760                 XUnsetICFocus(xw.xic);
3761                 xw.state &= ~WIN_FOCUSED;
3762                 if(IS_SET(MODE_FOCUS))
3763                         ttywrite("\033[O", 3);
3764         }
3765 }
3766
3767 bool
3768 match(uint mask, uint state) {
3769         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3770 }
3771
3772 void
3773 numlock(const Arg *dummy) {
3774         term.numlock ^= 1;
3775 }
3776
3777 char*
3778 kmap(KeySym k, uint state) {
3779         Key *kp;
3780         int i;
3781
3782         /* Check for mapped keys out of X11 function keys. */
3783         for(i = 0; i < LEN(mappedkeys); i++) {
3784                 if(mappedkeys[i] == k)
3785                         break;
3786         }
3787         if(i == LEN(mappedkeys)) {
3788                 if((k & 0xFFFF) < 0xFD00)
3789                         return NULL;
3790         }
3791
3792         for(kp = key; kp < key + LEN(key); kp++) {
3793                 if(kp->k != k)
3794                         continue;
3795
3796                 if(!match(kp->mask, state))
3797                         continue;
3798
3799                 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3800                         continue;
3801                 if(term.numlock && kp->appkey == 2)
3802                         continue;
3803
3804                 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3805                         continue;
3806
3807                 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3808                         continue;
3809
3810                 return kp->s;
3811         }
3812
3813         return NULL;
3814 }
3815
3816 void
3817 kpress(XEvent *ev) {
3818         XKeyEvent *e = &ev->xkey;
3819         KeySym ksym;
3820         char buf[32], *customkey;
3821         int len;
3822         long c;
3823         Status status;
3824         Shortcut *bp;
3825
3826         if(IS_SET(MODE_KBDLOCK))
3827                 return;
3828
3829         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3830         /* 1. shortcuts */
3831         for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3832                 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3833                         bp->func(&(bp->arg));
3834                         return;
3835                 }
3836         }
3837
3838         /* 2. custom keys from config.h */
3839         if((customkey = kmap(ksym, e->state))) {
3840                 ttysend(customkey, strlen(customkey));
3841                 return;
3842         }
3843
3844         /* 3. composed string from input method */
3845         if(len == 0)
3846                 return;
3847         if(len == 1 && e->state & Mod1Mask) {
3848                 if(IS_SET(MODE_8BIT)) {
3849                         if(*buf < 0177) {
3850                                 c = *buf | 0x80;
3851                                 len = utf8encode(c, buf, UTF_SIZ);
3852                         }
3853                 } else {
3854                         buf[1] = buf[0];
3855                         buf[0] = '\033';
3856                         len = 2;
3857                 }
3858         }
3859         ttysend(buf, len);
3860 }
3861
3862
3863 void
3864 cmessage(XEvent *e) {
3865         /*
3866          * See xembed specs
3867          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3868          */
3869         if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3870                 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3871                         xw.state |= WIN_FOCUSED;
3872                         xseturgency(0);
3873                 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3874                         xw.state &= ~WIN_FOCUSED;
3875                 }
3876         } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3877                 /* Send SIGHUP to shell */
3878                 kill(pid, SIGHUP);
3879                 exit(EXIT_SUCCESS);
3880         }
3881 }
3882
3883 void
3884 cresize(int width, int height) {
3885         int col, row;
3886
3887         if(width != 0)
3888                 xw.w = width;
3889         if(height != 0)
3890                 xw.h = height;
3891
3892         col = (xw.w - 2 * borderpx) / xw.cw;
3893         row = (xw.h - 2 * borderpx) / xw.ch;
3894
3895         tresize(col, row);
3896         xresize(col, row);
3897         ttyresize();
3898 }
3899
3900 void
3901 resize(XEvent *e) {
3902         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3903                 return;
3904
3905         cresize(e->xconfigure.width, e->xconfigure.height);
3906 }
3907
3908 void
3909 run(void) {
3910         XEvent ev;
3911         int w = xw.w, h = xw.h;
3912         fd_set rfd;
3913         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3914         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3915         long deltatime;
3916
3917         /* Waiting for window mapping */
3918         do {
3919                 XNextEvent(xw.dpy, &ev);
3920                 if(ev.type == ConfigureNotify) {
3921                         w = ev.xconfigure.width;
3922                         h = ev.xconfigure.height;
3923                 }
3924         } while(ev.type != MapNotify);
3925
3926         ttynew();
3927         cresize(w, h);
3928
3929         clock_gettime(CLOCK_MONOTONIC, &last);
3930         lastblink = last;
3931
3932         for(xev = actionfps;;) {
3933                 FD_ZERO(&rfd);
3934                 FD_SET(cmdfd, &rfd);
3935                 FD_SET(xfd, &rfd);
3936
3937                 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3938                         if(errno == EINTR)
3939                                 continue;
3940                         die("select failed: %s\n", strerror(errno));
3941                 }
3942                 if(FD_ISSET(cmdfd, &rfd)) {
3943                         ttyread();
3944                         if(blinktimeout) {
3945                                 blinkset = tattrset(ATTR_BLINK);
3946                                 if(!blinkset)
3947                                         MODBIT(term.mode, 0, MODE_BLINK);
3948                         }
3949                 }
3950
3951                 if(FD_ISSET(xfd, &rfd))
3952                         xev = actionfps;
3953
3954                 clock_gettime(CLOCK_MONOTONIC, &now);
3955                 drawtimeout.tv_sec = 0;
3956                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
3957                 tv = &drawtimeout;
3958
3959                 dodraw = 0;
3960                 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3961                         tsetdirtattr(ATTR_BLINK);
3962                         term.mode ^= MODE_BLINK;
3963                         lastblink = now;
3964                         dodraw = 1;
3965                 }
3966                 deltatime = TIMEDIFF(now, last);
3967                 if(deltatime > 1000 / (xev ? xfps : actionfps)) {
3968                         dodraw = 1;
3969                         last = now;
3970                 }
3971
3972                 if(dodraw) {
3973                         while(XPending(xw.dpy)) {
3974                                 XNextEvent(xw.dpy, &ev);
3975                                 if(XFilterEvent(&ev, None))
3976                                         continue;
3977                                 if(handler[ev.type])
3978                                         (handler[ev.type])(&ev);
3979                         }
3980
3981                         draw();
3982                         XFlush(xw.dpy);
3983
3984                         if(xev && !FD_ISSET(xfd, &rfd))
3985                                 xev--;
3986                         if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3987                                 if(blinkset) {
3988                                         if(TIMEDIFF(now, lastblink) \
3989                                                         > blinktimeout) {
3990                                                 drawtimeout.tv_nsec = 1000;
3991                                         } else {
3992                                                 drawtimeout.tv_nsec = (1E6 * \
3993                                                         (blinktimeout - \
3994                                                         TIMEDIFF(now,
3995                                                                 lastblink)));
3996                                         }
3997                                         drawtimeout.tv_sec = \
3998                                             drawtimeout.tv_nsec / 1E9;
3999                                         drawtimeout.tv_nsec %= (long)1E9;
4000                                 } else {
4001                                         tv = NULL;
4002                                 }
4003                         }
4004                 }
4005         }
4006 }
4007
4008 void
4009 usage(void) {
4010         die("%s " VERSION " (c) 2010-2015 st engineers\n"
4011         "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4012         "          [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
4013         "       st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4014         "          [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
4015         argv0);
4016 }
4017
4018 int
4019 main(int argc, char *argv[]) {
4020         uint cols = 80, rows = 24;
4021
4022         xw.l = xw.t = 0;
4023         xw.isfixed = False;
4024         xw.cursor = 0;
4025
4026         ARGBEGIN {
4027         case 'a':
4028                 allowaltscreen = false;
4029                 break;
4030         case 'c':
4031                 opt_class = EARGF(usage());
4032                 break;
4033         case 'e':
4034                 if(argc > 1)
4035                         --argc, ++argv;
4036                 goto run;
4037         case 'f':
4038                 opt_font = EARGF(usage());
4039                 break;
4040         case 'g':
4041                 xw.gm = XParseGeometry(EARGF(usage()),
4042                                 &xw.l, &xw.t, &cols, &rows);
4043                 break;
4044         case 'i':
4045                 xw.isfixed = True;
4046                 break;
4047         case 'o':
4048                 opt_io = EARGF(usage());
4049                 break;
4050         case 'l':
4051                 opt_line = EARGF(usage());
4052                 break;
4053         case 't':
4054                 opt_title = EARGF(usage());
4055                 break;
4056         case 'w':
4057                 opt_embed = EARGF(usage());
4058                 break;
4059         case 'v':
4060         default:
4061                 usage();
4062         } ARGEND;
4063
4064 run:
4065         if(argc > 0) {
4066                 /* eat all remaining arguments */
4067                 opt_cmd = argv;
4068                 if(!opt_title && !opt_line)
4069                         opt_title = basename(xstrdup(argv[0]));
4070         }
4071         setlocale(LC_CTYPE, "");
4072         XSetLocaleModifiers("");
4073         tnew(MAX(cols, 1), MAX(rows, 1));
4074         xinit();
4075         selinit();
4076         run();
4077
4078         return 0;
4079 }
4080