st.c

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