st.c

   1 /* See LICENSE for licence details. */
   2 #include <ctype.h>
   3 #include <errno.h>
   4 #include <fcntl.h>
   5 #include <limits.h>
   6 #include <locale.h>
   7 #include <pwd.h>
   8 #include <stdarg.h>
   9 #include <stdbool.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <signal.h>
  14 #include <stdint.h>
  15 #include <sys/ioctl.h>
  16 #include <sys/select.h>
  17 #include <sys/stat.h>
  18 #include <sys/time.h>
  19 #include <sys/types.h>
  20 #include <sys/wait.h>
  21 #include <time.h>
  22 #include <unistd.h>
  23 #include <libgen.h>
  24 #include <X11/Xatom.h>
  25 #include <X11/Xlib.h>
  26 #include <X11/Xutil.h>
  27 #include <X11/cursorfont.h>
  28 #include <X11/keysym.h>
  29 #include <X11/Xft/Xft.h>
  30 #include <X11/XKBlib.h>
  31 #include <fontconfig/fontconfig.h>
  32 #include <wchar.h>
  33
  34 #include "arg.h"
  35
  36 char *argv0;
  37
  38 #define Glyph Glyph_
  39 #define Font Font_
  40
  41 #if   defined(__linux)
  42  #include <pty.h>
  43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  44  #include <util.h>
  45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
  46  #include <libutil.h>
  47 #endif
  48
  49
  50 /* XEMBED messages */
  51 #define XEMBED_FOCUS_IN  4
  52 #define XEMBED_FOCUS_OUT 5
  53
  54 /* Arbitrary sizes */
  55 #define UTF_INVALID   0xFFFD
  56 #define UTF_SIZ       4
  57 #define ESC_BUF_SIZ   (128*UTF_SIZ)
  58 #define ESC_ARG_SIZ   16
  59 #define STR_BUF_SIZ   ESC_BUF_SIZ
  60 #define STR_ARG_SIZ   ESC_ARG_SIZ
  61 #define DRAW_BUF_SIZ  20*1024
  62 #define XK_ANY_MOD    UINT_MAX
  63 #define XK_NO_MOD     0
  64 #define XK_SWITCH_MOD (1<<13)
  65
  66 /* macros */
  67 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
  68 #define MAX(a, b)  ((a) < (b) ? (b) : (a))
  69 #define LEN(a)     (sizeof(a) / sizeof(a)[0])
  70 #define DEFAULT(a, b)     (a) = (a) ? (a) : (b)
  71 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
  72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
  73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
  74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
  75 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
  78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
  79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
  80
  81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
  82 #define IS_TRUECOL(x)    (1 << 24 & (x))
  83 #define TRUERED(x)       (((x) & 0xff0000) >> 8)
  84 #define TRUEGREEN(x)     (((x) & 0xff00))
  85 #define TRUEBLUE(x)      (((x) & 0xff) << 8)
  86
  87
  88 enum glyph_attribute {
  89         ATTR_NULL      = 0,
  90         ATTR_BOLD      = 1 << 0,
  91         ATTR_FAINT     = 1 << 1,
  92         ATTR_ITALIC    = 1 << 2,
  93         ATTR_UNDERLINE = 1 << 3,
  94         ATTR_BLINK     = 1 << 4,
  95         ATTR_REVERSE   = 1 << 5,
  96         ATTR_INVISIBLE = 1 << 6,
  97         ATTR_STRUCK    = 1 << 7,
  98         ATTR_WRAP      = 1 << 8,
  99         ATTR_WIDE      = 1 << 9,
 100         ATTR_WDUMMY    = 1 << 10,
 101 };
 102
 103 enum cursor_movement {
 104         CURSOR_SAVE,
 105         CURSOR_LOAD
 106 };
 107
 108 enum cursor_state {
 109         CURSOR_DEFAULT  = 0,
 110         CURSOR_WRAPNEXT = 1,
 111         CURSOR_ORIGIN   = 2
 112 };
 113
 114 enum term_mode {
 115         MODE_WRAP        = 1 << 0,
 116         MODE_INSERT      = 1 << 1,
 117         MODE_APPKEYPAD   = 1 << 2,
 118         MODE_ALTSCREEN   = 1 << 3,
 119         MODE_CRLF        = 1 << 4,
 120         MODE_MOUSEBTN    = 1 << 5,
 121         MODE_MOUSEMOTION = 1 << 6,
 122         MODE_REVERSE     = 1 << 7,
 123         MODE_KBDLOCK     = 1 << 8,
 124         MODE_HIDE        = 1 << 9,
 125         MODE_ECHO        = 1 << 10,
 126         MODE_APPCURSOR   = 1 << 11,
 127         MODE_MOUSESGR    = 1 << 12,
 128         MODE_8BIT        = 1 << 13,
 129         MODE_BLINK       = 1 << 14,
 130         MODE_FBLINK      = 1 << 15,
 131         MODE_FOCUS       = 1 << 16,
 132         MODE_MOUSEX10    = 1 << 17,
 133         MODE_MOUSEMANY   = 1 << 18,
 134         MODE_BRCKTPASTE  = 1 << 19,
 135         MODE_PRINT       = 1 << 20,
 136         MODE_MOUSE       = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
 137                           |MODE_MOUSEMANY,
 138 };
 139
 140 enum charset {
 141         CS_GRAPHIC0,
 142         CS_GRAPHIC1,
 143         CS_UK,
 144         CS_USA,
 145         CS_MULTI,
 146         CS_GER,
 147         CS_FIN
 148 };
 149
 150 enum escape_state {
 151         ESC_START      = 1,
 152         ESC_CSI        = 2,
 153         ESC_STR        = 4,  /* DCS, OSC, PM, APC */
 154         ESC_ALTCHARSET = 8,
 155         ESC_STR_END    = 16, /* a final string was encountered */
 156         ESC_TEST       = 32, /* Enter in test mode */
 157 };
 158
 159 enum window_state {
 160         WIN_VISIBLE = 1,
 161         WIN_REDRAW  = 2,
 162         WIN_FOCUSED = 4
 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         char c[UTF_SIZ]; /* character code */
 185         ushort mode;      /* attribute flags */
 186         uint32_t fg;      /* foreground  */
 187         uint32_t 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>] */
 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;
 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 } XWindow;
 261
 262 typedef struct {
 263         uint b;
 264         uint mask;
 265         char *s;
 266 } Mousekey;
 267
 268 typedef struct {
 269         KeySym k;
 270         uint mask;
 271         char *s;
 272         /* three valued logic variables: 0 indifferent, 1 on, -1 off */
 273         signed char appkey;    /* application keypad */
 274         signed char appcursor; /* application cursor */
 275         signed char crlf;      /* crlf mode          */
 276 } Key;
 277
 278 typedef struct {
 279         int mode;
 280         int type;
 281         int snap;
 282         /*
 283          * Selection variables:
 284          * nb – normalized coordinates of the beginning of the selection
 285          * ne – normalized coordinates of the end of the selection
 286          * ob – original coordinates of the beginning of the selection
 287          * oe – original coordinates of the end of the selection
 288          */
 289         struct {
 290                 int x, y;
 291         } nb, ne, ob, oe;
 292
 293         char *primary, *clipboard;
 294         Atom xtarget;
 295         bool alt;
 296         struct timespec tclick1;
 297         struct timespec tclick2;
 298 } Selection;
 299
 300 typedef union {
 301         int i;
 302         uint ui;
 303         float f;
 304         const void *v;
 305 } Arg;
 306
 307 typedef struct {
 308         uint mod;
 309         KeySym keysym;
 310         void (*func)(const Arg *);
 311         const Arg arg;
 312 } Shortcut;
 313
 314 /* function definitions used in config.h */
 315 static void clipcopy(const Arg *);
 316 static void clippaste(const Arg *);
 317 static void numlock(const Arg *);
 318 static void selpaste(const Arg *);
 319 static void xzoom(const Arg *);
 320 static void xzoomabs(const Arg *);
 321 static void xzoomreset(const Arg *);
 322 static void printsel(const Arg *);
 323 static void printscreen(const Arg *) ;
 324 static void toggleprinter(const Arg *);
 325
 326 /* Config.h for applying patches and the configuration. */
 327 #include "config.h"
 328
 329 /* Font structure */
 330 typedef struct {
 331         int height;
 332         int width;
 333         int ascent;
 334         int descent;
 335         short lbearing;
 336         short rbearing;
 337         XftFont *match;
 338         FcFontSet *set;
 339         FcPattern *pattern;
 340 } Font;
 341
 342 /* Drawing Context */
 343 typedef struct {
 344         Color col[MAX(LEN(colorname), 256)];
 345         Font font, bfont, ifont, ibfont;
 346         GC gc;
 347 } DC;
 348
 349 static void die(const char *, ...);
 350 static void draw(void);
 351 static void redraw(void);
 352 static void drawregion(int, int, int, int);
 353 static void execsh(void);
 354 static void sigchld(int);
 355 static void run(void);
 356
 357 static void csidump(void);
 358 static void csihandle(void);
 359 static void csiparse(void);
 360 static void csireset(void);
 361 static int eschandle(uchar ascii);
 362 static void strdump(void);
 363 static void strhandle(void);
 364 static void strparse(void);
 365 static void strreset(void);
 366
 367 static int tattrset(int);
 368 static void tprinter(char *, size_t);
 369 static void tdumpsel(void);
 370 static void tdumpline(int);
 371 static void tdump(void);
 372 static void tclearregion(int, int, int, int);
 373 static void tcursor(int);
 374 static void tdeletechar(int);
 375 static void tdeleteline(int);
 376 static void tinsertblank(int);
 377 static void tinsertblankline(int);
 378 static int tlinelen(int);
 379 static void tmoveto(int, int);
 380 static void tmoveato(int, int);
 381 static void tnew(int, int);
 382 static void tnewline(int);
 383 static void tputtab(int);
 384 static void tputc(char *, int);
 385 static void treset(void);
 386 static void tresize(int, int);
 387 static void tscrollup(int, int);
 388 static void tscrolldown(int, int);
 389 static void tsetattr(int *, int);
 390 static void tsetchar(char *, Glyph *, int, int);
 391 static void tsetscroll(int, int);
 392 static void tswapscreen(void);
 393 static void tsetdirt(int, int);
 394 static void tsetdirtattr(int);
 395 static void tsetmode(bool, bool, int *, int);
 396 static void tfulldirt(void);
 397 static void techo(char *, int);
 398 static void tcontrolcode(uchar );
 399 static void tdectest(char );
 400 static int32_t tdefcolor(int *, int *, int);
 401 static void tdeftran(char);
 402 static inline bool match(uint, uint);
 403 static void ttynew(void);
 404 static void ttyread(void);
 405 static void ttyresize(void);
 406 static void ttysend(char *, size_t);
 407 static void ttywrite(const char *, size_t);
 408 static void tstrsequence(uchar c);
 409
 410 static void xdraws(char *, Glyph, int, int, int, int);
 411 static void xhints(void);
 412 static void xclear(int, int, int, int);
 413 static void xdrawcursor(void);
 414 static void xinit(void);
 415 static void xloadcols(void);
 416 static int xsetcolorname(int, const char *);
 417 static int xgeommasktogravity(int);
 418 static int xloadfont(Font *, FcPattern *);
 419 static void xloadfonts(char *, double);
 420 static int xloadfontset(Font *);
 421 static void xsettitle(char *);
 422 static void xresettitle(void);
 423 static void xsetpointermotion(int);
 424 static void xseturgency(int);
 425 static void xsetsel(char *);
 426 static void xtermclear(int, int, int, int);
 427 static void xunloadfont(Font *);
 428 static void xunloadfonts(void);
 429 static void xresize(int, int);
 430
 431 static void expose(XEvent *);
 432 static void visibility(XEvent *);
 433 static void unmap(XEvent *);
 434 static char *kmap(KeySym, uint);
 435 static void kpress(XEvent *);
 436 static void cmessage(XEvent *);
 437 static void cresize(int, int);
 438 static void resize(XEvent *);
 439 static void focus(XEvent *);
 440 static void brelease(XEvent *);
 441 static void bpress(XEvent *);
 442 static void bmotion(XEvent *);
 443 static void selnotify(XEvent *);
 444 static void selclear(XEvent *);
 445 static void selrequest(XEvent *);
 446
 447 static void selinit(void);
 448 static void selnormalize(void);
 449 static inline bool selected(int, int);
 450 static char *getsel(void);
 451 static void selcopy(void);
 452 static void selscroll(int, int);
 453 static void selsnap(int, int *, int *, int);
 454 static void getbuttoninfo(XEvent *);
 455 static void mousereport(XEvent *);
 456
 457 static size_t utf8decode(char *, long *, size_t);
 458 static long utf8decodebyte(char, size_t *);
 459 static size_t utf8encode(long, char *, size_t);
 460 static char utf8encodebyte(long, size_t);
 461 static size_t utf8len(char *);
 462 static size_t utf8validate(long *, size_t);
 463
 464 static ssize_t xwrite(int, const char *, size_t);
 465 static void *xmalloc(size_t);
 466 static void *xrealloc(void *, size_t);
 467 static char *xstrdup(char *);
 468
 469 static void usage(void);
 470
 471 static void (*handler[LASTEvent])(XEvent *) = {
 472         [KeyPress] = kpress,
 473         [ClientMessage] = cmessage,
 474         [ConfigureNotify] = resize,
 475         [VisibilityNotify] = visibility,
 476         [UnmapNotify] = unmap,
 477         [Expose] = expose,
 478         [FocusIn] = focus,
 479         [FocusOut] = focus,
 480         [MotionNotify] = bmotion,
 481         [ButtonPress] = bpress,
 482         [ButtonRelease] = brelease,
 483 /*
 484  * Uncomment if you want the selection to disappear when you select something
 485  * different in another window.
 486  */
 487 /*      [SelectionClear] = selclear, */
 488         [SelectionNotify] = selnotify,
 489         [SelectionRequest] = selrequest,
 490 };
 491
 492 /* Globals */
 493 static DC dc;
 494 static XWindow xw;
 495 static Term term;
 496 static CSIEscape csiescseq;
 497 static STREscape strescseq;
 498 static int cmdfd;
 499 static pid_t pid;
 500 static Selection sel;
 501 static int iofd = STDOUT_FILENO;
 502 static char **opt_cmd = NULL;
 503 static char *opt_io = NULL;
 504 static char *opt_title = NULL;
 505 static char *opt_embed = NULL;
 506 static char *opt_class = NULL;
 507 static char *opt_font = NULL;
 508 static int oldbutton = 3; /* button event on startup: 3 = release */
 509
 510 static char *usedfont = NULL;
 511 static double usedfontsize = 0;
 512 static double defaultfontsize = 0;
 513
 514 static uchar utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
 515 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
 516 static long utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
 517 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
 518
 519 /* Font Ring Cache */
 520 enum {
 521         FRC_NORMAL,
 522         FRC_ITALIC,
 523         FRC_BOLD,
 524         FRC_ITALICBOLD
 525 };
 526
 527 typedef struct {
 528         XftFont *font;
 529         int flags;
 530         long unicodep;
 531 } Fontcache;
 532
 533 /* Fontcache is an array now. A new font will be appended to the array. */
 534 static Fontcache frc[16];
 535 static int frclen = 0;
 536
 537 ssize_t
 538 xwrite(int fd, const char *s, size_t len) {
 539         size_t aux = len;
 540
 541         while(len > 0) {
 542                 ssize_t r = write(fd, s, len);
 543                 if(r < 0)
 544                         return r;
 545                 len -= r;
 546                 s += r;
 547         }
 548         return aux;
 549 }
 550
 551 void *
 552 xmalloc(size_t len) {
 553         void *p = malloc(len);
 554
 555         if(!p)
 556                 die("Out of memory\n");
 557
 558         return p;
 559 }
 560
 561 void *
 562 xrealloc(void *p, size_t len) {
 563         if((p = realloc(p, len)) == NULL)
 564                 die("Out of memory\n");
 565
 566         return p;
 567 }
 568
 569 char *
 570 xstrdup(char *s) {
 571         if((s = strdup(s)) == NULL)
 572                 die("Out of memory\n");
 573
 574         return s;
 575 }
 576
 577 size_t
 578 utf8decode(char *c, long *u, size_t clen) {
 579         size_t i, j, len, type;
 580         long udecoded;
 581
 582         *u = UTF_INVALID;
 583         if(!clen)
 584                 return 0;
 585         udecoded = utf8decodebyte(c[0], &len);
 586         if(!BETWEEN(len, 1, UTF_SIZ))
 587                 return 1;
 588         for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
 589                 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
 590                 if(type != 0)
 591                         return j;
 592         }
 593         if(j < len)
 594                 return 0;
 595         *u = udecoded;
 596         utf8validate(u, len);
 597         return len;
 598 }
 599
 600 long
 601 utf8decodebyte(char c, size_t *i) {
 602         for(*i = 0; *i < LEN(utfmask); ++(*i))
 603                 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
 604                         return (uchar)c & ~utfmask[*i];
 605         return 0;
 606 }
 607
 608 size_t
 609 utf8encode(long u, char *c, size_t clen) {
 610         size_t len, i;
 611
 612         len = utf8validate(&u, 0);
 613         if(clen < len)
 614                 return 0;
 615         for(i = len - 1; i != 0; --i) {
 616                 c[i] = utf8encodebyte(u, 0);
 617                 u >>= 6;
 618         }
 619         c[0] = utf8encodebyte(u, len);
 620         return len;
 621 }
 622
 623 char
 624 utf8encodebyte(long u, size_t i) {
 625         return utfbyte[i] | (u & ~utfmask[i]);
 626 }
 627
 628 size_t
 629 utf8len(char *c) {
 630         return utf8decode(c, &(long){0}, UTF_SIZ);
 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 static 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 static int
 656 x2col(int x) {
 657         x -= borderpx;
 658         x /= xw.cw;
 659
 660         return LIMIT(x, 0, term.col-1);
 661 }
 662
 663 static int
 664 y2row(int y) {
 665         y -= borderpx;
 666         y /= xw.ch;
 667
 668         return LIMIT(y, 0, term.row-1);
 669 }
 670
 671 static int tlinelen(int y) {
 672         int i = term.col;
 673
 674         if(term.line[y][i - 1].mode & ATTR_WRAP)
 675                 return i;
 676
 677         while(i > 0 && term.line[y][i - 1].c[0] == ' ')
 678                 --i;
 679
 680         return i;
 681 }
 682
 683 static void
 684 selnormalize(void) {
 685         int i;
 686
 687         if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
 688                 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
 689                 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
 690         } else {
 691                 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
 692                 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
 693         }
 694         sel.nb.y = MIN(sel.ob.y, sel.oe.y);
 695         sel.ne.y = MAX(sel.ob.y, sel.oe.y);
 696
 697         selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
 698         selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
 699
 700         /* expand selection over line breaks */
 701         if (sel.type == SEL_RECTANGULAR)
 702                 return;
 703         i = tlinelen(sel.nb.y);
 704         if (i < sel.nb.x)
 705                 sel.nb.x = i;
 706         if (tlinelen(sel.ne.y) <= sel.ne.x)
 707                 sel.ne.x = term.col - 1;
 708 }
 709
 710 static inline bool
 711 selected(int x, int y) {
 712         if(sel.type == SEL_RECTANGULAR)
 713                 return BETWEEN(y, sel.nb.y, sel.ne.y)
 714                     && BETWEEN(x, sel.nb.x, sel.ne.x);
 715
 716         return BETWEEN(y, sel.nb.y, sel.ne.y)
 717             && (y != sel.nb.y || x >= sel.nb.x)
 718             && (y != sel.ne.y || x <= sel.ne.x);
 719 }
 720
 721 void
 722 selsnap(int mode, int *x, int *y, int direction) {
 723         int newx, newy, xt, yt;
 724         bool delim, prevdelim;
 725         Glyph *gp, *prevgp;
 726
 727         switch(mode) {
 728         case SNAP_WORD:
 729                 /*
 730                  * Snap around if the word wraps around at the end or
 731                  * beginning of a line.
 732                  */
 733                 prevgp = &term.line[*y][*x];
 734                 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
 735                 for(;;) {
 736                         newx = *x + direction;
 737                         newy = *y;
 738                         if(!BETWEEN(newx, 0, term.col - 1)) {
 739                                 newy += direction;
 740                                 newx = (newx + term.col) % term.col;
 741                                 if (!BETWEEN(newy, 0, term.row - 1))
 742                                         break;
 743
 744                                 if(direction > 0)
 745                                         yt = *y, xt = *x;
 746                                 else
 747                                         yt = newy, xt = newx;
 748                                 if(!(term.line[yt][xt].mode & ATTR_WRAP))
 749                                         break;
 750                         }
 751
 752                         if (newx >= tlinelen(newy))
 753                                 break;
 754
 755                         gp = &term.line[newy][newx];
 756                         delim = strchr(worddelimiters, gp->c[0]) != NULL;
 757                         if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
 758                                         || (delim && gp->c[0] != prevgp->c[0])))
 759                                 break;
 760
 761                         *x = newx;
 762                         *y = newy;
 763                         prevgp = gp;
 764                         prevdelim = delim;
 765                 }
 766                 break;
 767         case SNAP_LINE:
 768                 /*
 769                  * Snap around if the the previous line or the current one
 770                  * has set ATTR_WRAP at its end. Then the whole next or
 771                  * previous line will be selected.
 772                  */
 773                 *x = (direction < 0) ? 0 : term.col - 1;
 774                 if(direction < 0 && *y > 0) {
 775                         for(; *y > 0; *y += direction) {
 776                                 if(!(term.line[*y-1][term.col-1].mode
 777                                                 & ATTR_WRAP)) {
 778                                         break;
 779                                 }
 780                         }
 781                 } else if(direction > 0 && *y < term.row-1) {
 782                         for(; *y < term.row; *y += direction) {
 783                                 if(!(term.line[*y][term.col-1].mode
 784                                                 & ATTR_WRAP)) {
 785                                         break;
 786                                 }
 787                         }
 788                 }
 789                 break;
 790         }
 791 }
 792
 793 void
 794 getbuttoninfo(XEvent *e) {
 795         int type;
 796         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 797
 798         sel.alt = IS_SET(MODE_ALTSCREEN);
 799
 800         sel.oe.x = x2col(e->xbutton.x);
 801         sel.oe.y = y2row(e->xbutton.y);
 802         selnormalize();
 803
 804         sel.type = SEL_REGULAR;
 805         for(type = 1; type < LEN(selmasks); ++type) {
 806                 if(match(selmasks[type], state)) {
 807                         sel.type = type;
 808                         break;
 809                 }
 810         }
 811 }
 812
 813 void
 814 mousereport(XEvent *e) {
 815         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 816             button = e->xbutton.button, state = e->xbutton.state,
 817             len;
 818         char buf[40];
 819         static int ox, oy;
 820
 821         /* from urxvt */
 822         if(e->xbutton.type == MotionNotify) {
 823                 if(x == ox && y == oy)
 824                         return;
 825                 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 826                         return;
 827                 /* MOUSE_MOTION: no reporting if no button is pressed */
 828                 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 829                         return;
 830
 831                 button = oldbutton + 32;
 832                 ox = x;
 833                 oy = y;
 834         } else {
 835                 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 836                         button = 3;
 837                 } else {
 838                         button -= Button1;
 839                         if(button >= 3)
 840                                 button += 64 - 3;
 841                 }
 842                 if(e->xbutton.type == ButtonPress) {
 843                         oldbutton = button;
 844                         ox = x;
 845                         oy = y;
 846                 } else if(e->xbutton.type == ButtonRelease) {
 847                         oldbutton = 3;
 848                         /* MODE_MOUSEX10: no button release reporting */
 849                         if(IS_SET(MODE_MOUSEX10))
 850                                 return;
 851                         if (button == 64 || button == 65)
 852                                 return;
 853                 }
 854         }
 855
 856         if(!IS_SET(MODE_MOUSEX10)) {
 857                 button += (state & ShiftMask   ? 4  : 0)
 858                         + (state & Mod4Mask    ? 8  : 0)
 859                         + (state & ControlMask ? 16 : 0);
 860         }
 861
 862         len = 0;
 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, size, 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 + 1; 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->c[0] == ' ')
 956                         --last;
 957
 958                 for( ; gp <= last; ++gp) {
 959                         if(gp->mode & ATTR_WDUMMY)
 960                                 continue;
 961
 962                         size = utf8len(gp->c);
 963                         memcpy(ptr, gp->c, size);
 964                         ptr += size;
 965                 }
 966
 967                 /*
 968                  * Copy and pasting of line endings is inconsistent
 969                  * in the inconsistent terminal and GUI world.
 970                  * The best solution seems like to produce '\n' when
 971                  * something is copied from st and convert '\n' to
 972                  * '\r', when something to be pasted is received by
 973                  * st.
 974                  * FIXME: Fix the computer world.
 975                  */
 976                 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
 977                         *ptr++ = '\n';
 978         }
 979         *ptr = 0;
 980         return str;
 981 }
 982
 983 void
 984 selcopy(void) {
 985         xsetsel(getsel());
 986 }
 987
 988 void
 989 selnotify(XEvent *e) {
 990         ulong nitems, ofs, rem;
 991         int format;
 992         uchar *data, *last, *repl;
 993         Atom type;
 994         XSelectionEvent *xsev;
 995
 996         ofs = 0;
 997         xsev = (XSelectionEvent *)e;
 998         if (xsev->property == None)
 999             return;
1000         do {
1001                 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1002                                         BUFSIZ/4, False, AnyPropertyType,
1003                                         &type, &format, &nitems, &rem,
1004                                         &data)) {
1005                         fprintf(stderr, "Clipboard allocation failed\n");
1006                         return;
1007                 }
1008
1009                 /*
1010                  * As seen in getsel:
1011                  * Line endings are inconsistent in the terminal and GUI world
1012                  * copy and pasting. When receiving some selection data,
1013                  * replace all '\n' with '\r'.
1014                  * FIXME: Fix the computer world.
1015                  */
1016                 repl = data;
1017                 last = data + nitems * format / 8;
1018                 while((repl = memchr(repl, '\n', last - repl))) {
1019                         *repl++ = '\r';
1020                 }
1021
1022                 if(IS_SET(MODE_BRCKTPASTE))
1023                         ttywrite("\033[200~", 6);
1024                 ttysend((char *)data, nitems * format / 8);
1025                 if(IS_SET(MODE_BRCKTPASTE))
1026                         ttywrite("\033[201~", 6);
1027                 XFree(data);
1028                 /* number of 32-bit chunks returned */
1029                 ofs += nitems * format / 32;
1030         } while(rem > 0);
1031 }
1032
1033 void
1034 selpaste(const Arg *dummy) {
1035         XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1036                         xw.win, CurrentTime);
1037 }
1038
1039 void
1040 clipcopy(const Arg *dummy) {
1041         Atom clipboard;
1042
1043         if(sel.clipboard != NULL)
1044                 free(sel.clipboard);
1045
1046         if(sel.primary != NULL) {
1047                 sel.clipboard = xstrdup(sel.primary);
1048                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1049                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1050         }
1051 }
1052
1053 void
1054 clippaste(const Arg *dummy) {
1055         Atom clipboard;
1056
1057         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1058         XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1059                         xw.win, CurrentTime);
1060 }
1061
1062 void
1063 selclear(XEvent *e) {
1064         if(sel.ob.x == -1)
1065                 return;
1066         sel.ob.x = -1;
1067         tsetdirt(sel.nb.y, sel.ne.y);
1068 }
1069
1070 void
1071 selrequest(XEvent *e) {
1072         XSelectionRequestEvent *xsre;
1073         XSelectionEvent xev;
1074         Atom xa_targets, string, clipboard;
1075         char *seltext;
1076
1077         xsre = (XSelectionRequestEvent *) e;
1078         xev.type = SelectionNotify;
1079         xev.requestor = xsre->requestor;
1080         xev.selection = xsre->selection;
1081         xev.target = xsre->target;
1082         xev.time = xsre->time;
1083         /* reject */
1084         xev.property = None;
1085
1086         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1087         if(xsre->target == xa_targets) {
1088                 /* respond with the supported type */
1089                 string = sel.xtarget;
1090                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1091                                 XA_ATOM, 32, PropModeReplace,
1092                                 (uchar *) &string, 1);
1093                 xev.property = xsre->property;
1094         } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1095                 /*
1096                  * xith XA_STRING non ascii characters may be incorrect in the
1097                  * requestor. It is not our problem, use utf8.
1098                  */
1099                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1100                 if(xsre->selection == XA_PRIMARY) {
1101                         seltext = sel.primary;
1102                 } else if(xsre->selection == clipboard) {
1103                         seltext = sel.clipboard;
1104                 } else {
1105                         fprintf(stderr,
1106                                 "Unhandled clipboard selection 0x%lx\n",
1107                                 xsre->selection);
1108                         return;
1109                 }
1110                 if(seltext != NULL) {
1111                         XChangeProperty(xsre->display, xsre->requestor,
1112                                         xsre->property, xsre->target,
1113                                         8, PropModeReplace,
1114                                         (uchar *)seltext, strlen(seltext));
1115                         xev.property = xsre->property;
1116                 }
1117         }
1118
1119         /* all done, send a notification to the listener */
1120         if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1121                 fprintf(stderr, "Error sending SelectionNotify event\n");
1122 }
1123
1124 void
1125 xsetsel(char *str) {
1126         free(sel.primary);
1127         sel.primary = str;
1128
1129         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1130 }
1131
1132 void
1133 brelease(XEvent *e) {
1134         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1135                 mousereport(e);
1136                 return;
1137         }
1138
1139         if(e->xbutton.button == Button2) {
1140                 selpaste(NULL);
1141         } else if(e->xbutton.button == Button1) {
1142                 if(sel.mode < 2) {
1143                         selclear(NULL);
1144                 } else {
1145                         getbuttoninfo(e);
1146                         selcopy();
1147                 }
1148                 sel.mode = 0;
1149                 tsetdirt(sel.nb.y, sel.ne.y);
1150         }
1151 }
1152
1153 void
1154 bmotion(XEvent *e) {
1155         int oldey, oldex, oldsby, oldsey;
1156
1157         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1158                 mousereport(e);
1159                 return;
1160         }
1161
1162         if(!sel.mode)
1163                 return;
1164
1165         sel.mode++;
1166         oldey = sel.oe.y;
1167         oldex = sel.oe.x;
1168         oldsby = sel.nb.y;
1169         oldsey = sel.ne.y;
1170         getbuttoninfo(e);
1171
1172         if(oldey != sel.oe.y || oldex != sel.oe.x)
1173                 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1174 }
1175
1176 void
1177 die(const char *errstr, ...) {
1178         va_list ap;
1179
1180         va_start(ap, errstr);
1181         vfprintf(stderr, errstr, ap);
1182         va_end(ap);
1183         exit(EXIT_FAILURE);
1184 }
1185
1186 void
1187 execsh(void) {
1188         char **args, *sh, *prog;
1189         const struct passwd *pw;
1190         char buf[sizeof(long) * 8 + 1];
1191
1192         errno = 0;
1193         if((pw = getpwuid(getuid())) == NULL) {
1194                 if(errno)
1195                         die("getpwuid:%s\n", strerror(errno));
1196                 else
1197                         die("who are you?\n");
1198         }
1199
1200         if (!(sh = getenv("SHELL"))) {
1201                 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1202         }
1203
1204         if(opt_cmd)
1205                 prog = opt_cmd[0];
1206         else if(utmp)
1207                 prog = utmp;
1208         else
1209                 prog = sh;
1210         args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1211
1212         snprintf(buf, sizeof(buf), "%lu", xw.win);
1213
1214         unsetenv("COLUMNS");
1215         unsetenv("LINES");
1216         unsetenv("TERMCAP");
1217         setenv("LOGNAME", pw->pw_name, 1);
1218         setenv("USER", pw->pw_name, 1);
1219         setenv("SHELL", sh, 1);
1220         setenv("HOME", pw->pw_dir, 1);
1221         setenv("TERM", termname, 1);
1222         setenv("WINDOWID", buf, 1);
1223
1224         signal(SIGCHLD, SIG_DFL);
1225         signal(SIGHUP, SIG_DFL);
1226         signal(SIGINT, SIG_DFL);
1227         signal(SIGQUIT, SIG_DFL);
1228         signal(SIGTERM, SIG_DFL);
1229         signal(SIGALRM, SIG_DFL);
1230
1231         execvp(prog, args);
1232         _exit(EXIT_FAILURE);
1233 }
1234
1235 void
1236 sigchld(int a) {
1237         int stat, ret;
1238
1239         if(waitpid(pid, &stat, 0) < 0)
1240                 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1241
1242         ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1243         if (ret != EXIT_SUCCESS)
1244                 die("child finished with error '%d'\n", stat);
1245         exit(EXIT_SUCCESS);
1246 }
1247
1248 void
1249 ttynew(void) {
1250         int m, s;
1251         struct winsize w = {term.row, term.col, 0, 0};
1252
1253         /* seems to work fine on linux, openbsd and freebsd */
1254         if(openpty(&m, &s, NULL, NULL, &w) < 0)
1255                 die("openpty failed: %s\n", strerror(errno));
1256
1257         switch(pid = fork()) {
1258         case -1:
1259                 die("fork failed\n");
1260                 break;
1261         case 0:
1262                 setsid(); /* create a new process group */
1263                 dup2(s, STDIN_FILENO);
1264                 dup2(s, STDOUT_FILENO);
1265                 dup2(s, STDERR_FILENO);
1266                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1267                         die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1268                 close(s);
1269                 close(m);
1270                 execsh();
1271                 break;
1272         default:
1273                 close(s);
1274                 cmdfd = m;
1275                 signal(SIGCHLD, sigchld);
1276                 if(opt_io) {
1277                         term.mode |= MODE_PRINT;
1278                         iofd = (!strcmp(opt_io, "-")) ?
1279                                   STDOUT_FILENO :
1280                                   open(opt_io, O_WRONLY | O_CREAT, 0666);
1281                         if(iofd < 0) {
1282                                 fprintf(stderr, "Error opening %s:%s\n",
1283                                         opt_io, strerror(errno));
1284                         }
1285                 }
1286                 break;
1287         }
1288 }
1289
1290 void
1291 ttyread(void) {
1292         static char buf[BUFSIZ];
1293         static int buflen = 0;
1294         char *ptr;
1295         char s[UTF_SIZ];
1296         int charsize; /* size of utf8 char in bytes */
1297         long unicodep;
1298         int ret;
1299
1300         /* append read bytes to unprocessed bytes */
1301         if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1302                 die("Couldn't read from shell: %s\n", strerror(errno));
1303
1304         /* process every complete utf8 char */
1305         buflen += ret;
1306         ptr = buf;
1307         while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1308                 utf8encode(unicodep, s, UTF_SIZ);
1309                 tputc(s, charsize);
1310                 ptr += charsize;
1311                 buflen -= charsize;
1312         }
1313
1314         /* keep any uncomplete utf8 char for the next call */
1315         memmove(buf, ptr, buflen);
1316 }
1317
1318 void
1319 ttywrite(const char *s, size_t n) {
1320         if(xwrite(cmdfd, s, n) == -1)
1321                 die("write error on tty: %s\n", strerror(errno));
1322 }
1323
1324 void
1325 ttysend(char *s, size_t n) {
1326         ttywrite(s, n);
1327         if(IS_SET(MODE_ECHO))
1328                 techo(s, n);
1329 }
1330
1331 void
1332 ttyresize(void) {
1333         struct winsize w;
1334
1335         w.ws_row = term.row;
1336         w.ws_col = term.col;
1337         w.ws_xpixel = xw.tw;
1338         w.ws_ypixel = xw.th;
1339         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1340                 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1341 }
1342
1343 int
1344 tattrset(int attr) {
1345         int i, j;
1346
1347         for(i = 0; i < term.row-1; i++) {
1348                 for(j = 0; j < term.col-1; j++) {
1349                         if(term.line[i][j].mode & attr)
1350                                 return 1;
1351                 }
1352         }
1353
1354         return 0;
1355 }
1356
1357 void
1358 tsetdirt(int top, int bot) {
1359         int i;
1360
1361         LIMIT(top, 0, term.row-1);
1362         LIMIT(bot, 0, term.row-1);
1363
1364         for(i = top; i <= bot; i++)
1365                 term.dirty[i] = 1;
1366 }
1367
1368 void
1369 tsetdirtattr(int attr) {
1370         int i, j;
1371
1372         for(i = 0; i < term.row-1; i++) {
1373                 for(j = 0; j < term.col-1; j++) {
1374                         if(term.line[i][j].mode & attr) {
1375                                 tsetdirt(i, i);
1376                                 break;
1377                         }
1378                 }
1379         }
1380 }
1381
1382 void
1383 tfulldirt(void) {
1384         tsetdirt(0, term.row-1);
1385 }
1386
1387 void
1388 tcursor(int mode) {
1389         static TCursor c[2];
1390         bool alt = IS_SET(MODE_ALTSCREEN);
1391
1392         if(mode == CURSOR_SAVE) {
1393                 c[alt] = term.c;
1394         } else if(mode == CURSOR_LOAD) {
1395                 term.c = c[alt];
1396                 tmoveto(c[alt].x, c[alt].y);
1397         }
1398 }
1399
1400 void
1401 treset(void) {
1402         uint i;
1403
1404         term.c = (TCursor){{
1405                 .mode = ATTR_NULL,
1406                 .fg = defaultfg,
1407                 .bg = defaultbg
1408         }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1409
1410         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1411         for(i = tabspaces; i < term.col; i += tabspaces)
1412                 term.tabs[i] = 1;
1413         term.top = 0;
1414         term.bot = term.row - 1;
1415         term.mode = MODE_WRAP;
1416         memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1417         term.charset = 0;
1418
1419         for(i = 0; i < 2; i++) {
1420                 tmoveto(0, 0);
1421                 tcursor(CURSOR_SAVE);
1422                 tclearregion(0, 0, term.col-1, term.row-1);
1423                 tswapscreen();
1424         }
1425 }
1426
1427 void
1428 tnew(int col, int row) {
1429         term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1430         tresize(col, row);
1431         term.numlock = 1;
1432
1433         treset();
1434 }
1435
1436 void
1437 tswapscreen(void) {
1438         Line *tmp = term.line;
1439
1440         term.line = term.alt;
1441         term.alt = tmp;
1442         term.mode ^= MODE_ALTSCREEN;
1443         tfulldirt();
1444 }
1445
1446 void
1447 tscrolldown(int orig, int n) {
1448         int i;
1449         Line temp;
1450
1451         LIMIT(n, 0, term.bot-orig+1);
1452
1453         tsetdirt(orig, term.bot-n);
1454         tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1455
1456         for(i = term.bot; i >= orig+n; i--) {
1457                 temp = term.line[i];
1458                 term.line[i] = term.line[i-n];
1459                 term.line[i-n] = temp;
1460         }
1461
1462         selscroll(orig, n);
1463 }
1464
1465 void
1466 tscrollup(int orig, int n) {
1467         int i;
1468         Line temp;
1469
1470         LIMIT(n, 0, term.bot-orig+1);
1471
1472         tclearregion(0, orig, term.col-1, orig+n-1);
1473         tsetdirt(orig+n, term.bot);
1474
1475         for(i = orig; i <= term.bot-n; i++) {
1476                 temp = term.line[i];
1477                 term.line[i] = term.line[i+n];
1478                 term.line[i+n] = temp;
1479         }
1480
1481         selscroll(orig, -n);
1482 }
1483
1484 void
1485 selscroll(int orig, int n) {
1486         if(sel.ob.x == -1)
1487                 return;
1488
1489         if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1490                 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1491                         selclear(NULL);
1492                         return;
1493                 }
1494                 if(sel.type == SEL_RECTANGULAR) {
1495                         if(sel.ob.y < term.top)
1496                                 sel.ob.y = term.top;
1497                         if(sel.oe.y > term.bot)
1498                                 sel.oe.y = term.bot;
1499                 } else {
1500                         if(sel.ob.y < term.top) {
1501                                 sel.ob.y = term.top;
1502                                 sel.ob.x = 0;
1503                         }
1504                         if(sel.oe.y > term.bot) {
1505                                 sel.oe.y = term.bot;
1506                                 sel.oe.x = term.col;
1507                         }
1508                 }
1509                 selnormalize();
1510         }
1511 }
1512
1513 void
1514 tnewline(int first_col) {
1515         int y = term.c.y;
1516
1517         if(y == term.bot) {
1518                 tscrollup(term.top, 1);
1519         } else {
1520                 y++;
1521         }
1522         tmoveto(first_col ? 0 : term.c.x, y);
1523 }
1524
1525 void
1526 csiparse(void) {
1527         char *p = csiescseq.buf, *np;
1528         long int v;
1529
1530         csiescseq.narg = 0;
1531         if(*p == '?') {
1532                 csiescseq.priv = 1;
1533                 p++;
1534         }
1535
1536         csiescseq.buf[csiescseq.len] = '\0';
1537         while(p < csiescseq.buf+csiescseq.len) {
1538                 np = NULL;
1539                 v = strtol(p, &np, 10);
1540                 if(np == p)
1541                         v = 0;
1542                 if(v == LONG_MAX || v == LONG_MIN)
1543                         v = -1;
1544                 csiescseq.arg[csiescseq.narg++] = v;
1545                 p = np;
1546                 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1547                         break;
1548                 p++;
1549         }
1550         csiescseq.mode = *p;
1551 }
1552
1553 /* for absolute user moves, when decom is set */
1554 void
1555 tmoveato(int x, int y) {
1556         tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1557 }
1558
1559 void
1560 tmoveto(int x, int y) {
1561         int miny, maxy;
1562
1563         if(term.c.state & CURSOR_ORIGIN) {
1564                 miny = term.top;
1565                 maxy = term.bot;
1566         } else {
1567                 miny = 0;
1568                 maxy = term.row - 1;
1569         }
1570         LIMIT(x, 0, term.col-1);
1571         LIMIT(y, miny, maxy);
1572         term.c.state &= ~CURSOR_WRAPNEXT;
1573         term.c.x = x;
1574         term.c.y = y;
1575 }
1576
1577 void
1578 tsetchar(char *c, Glyph *attr, int x, int y) {
1579         static char *vt100_0[62] = { /* 0x41 - 0x7e */
1580                 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1581                 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1582                 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1583                 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1584                 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1585                 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1586                 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1587                 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1588         };
1589
1590         /*
1591          * The table is proudly stolen from rxvt.
1592          */
1593         if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1594                 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1595                         c = vt100_0[c[0] - 0x41];
1596                 }
1597         }
1598
1599         if(term.line[y][x].mode & ATTR_WIDE) {
1600                 if(x+1 < term.col) {
1601                         term.line[y][x+1].c[0] = ' ';
1602                         term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1603                 }
1604         } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1605                 term.line[y][x-1].c[0] = ' ';
1606                 term.line[y][x-1].mode &= ~ATTR_WIDE;
1607         }
1608
1609         term.dirty[y] = 1;
1610         term.line[y][x] = *attr;
1611         memcpy(term.line[y][x].c, c, UTF_SIZ);
1612 }
1613
1614 void
1615 tclearregion(int x1, int y1, int x2, int y2) {
1616         int x, y, temp;
1617         Glyph *gp;
1618
1619         if(x1 > x2)
1620                 temp = x1, x1 = x2, x2 = temp;
1621         if(y1 > y2)
1622                 temp = y1, y1 = y2, y2 = temp;
1623
1624         LIMIT(x1, 0, term.col-1);
1625         LIMIT(x2, 0, term.col-1);
1626         LIMIT(y1, 0, term.row-1);
1627         LIMIT(y2, 0, term.row-1);
1628
1629         for(y = y1; y <= y2; y++) {
1630                 term.dirty[y] = 1;
1631                 for(x = x1; x <= x2; x++) {
1632                         gp = &term.line[y][x];
1633                         if(selected(x, y))
1634                                 selclear(NULL);
1635                         gp->fg = term.c.attr.fg;
1636                         gp->bg = term.c.attr.bg;
1637                         gp->mode = 0;
1638                         memcpy(gp->c, " ", 2);
1639                 }
1640         }
1641 }
1642
1643 void
1644 tdeletechar(int n) {
1645         int dst, src, size;
1646         Glyph *line;
1647
1648         LIMIT(n, 0, term.col - term.c.x);
1649
1650         dst = term.c.x;
1651         src = term.c.x + n;
1652         size = term.col - src;
1653         line = term.line[term.c.y];
1654
1655         memmove(&line[dst], &line[src], size * sizeof(Glyph));
1656         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1657 }
1658
1659 void
1660 tinsertblank(int n) {
1661         int dst, src, size;
1662         Glyph *line;
1663
1664         LIMIT(n, 0, term.col - term.c.x);
1665
1666         dst = term.c.x + n;
1667         src = term.c.x;
1668         size = term.col - dst;
1669         line = term.line[term.c.y];
1670
1671         memmove(&line[dst], &line[src], size * sizeof(Glyph));
1672         tclearregion(src, term.c.y, dst - 1, term.c.y);
1673 }
1674
1675 void
1676 tinsertblankline(int n) {
1677         if(BETWEEN(term.c.y, term.top, term.bot))
1678                 tscrolldown(term.c.y, n);
1679 }
1680
1681 void
1682 tdeleteline(int n) {
1683         if(BETWEEN(term.c.y, term.top, term.bot))
1684                 tscrollup(term.c.y, n);
1685 }
1686
1687 int32_t
1688 tdefcolor(int *attr, int *npar, int l) {
1689         int32_t idx = -1;
1690         uint r, g, b;
1691
1692         switch (attr[*npar + 1]) {
1693         case 2: /* direct color in RGB space */
1694                 if (*npar + 4 >= l) {
1695                         fprintf(stderr,
1696                                 "erresc(38): Incorrect number of parameters (%d)\n",
1697                                 *npar);
1698                         break;
1699                 }
1700                 r = attr[*npar + 2];
1701                 g = attr[*npar + 3];
1702                 b = attr[*npar + 4];
1703                 *npar += 4;
1704                 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1705                         fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1706                                 r, g, b);
1707                 else
1708                         idx = TRUECOLOR(r, g, b);
1709                 break;
1710         case 5: /* indexed color */
1711                 if (*npar + 2 >= l) {
1712                         fprintf(stderr,
1713                                 "erresc(38): Incorrect number of parameters (%d)\n",
1714                                 *npar);
1715                         break;
1716                 }
1717                 *npar += 2;
1718                 if(!BETWEEN(attr[*npar], 0, 255))
1719                         fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1720                 else
1721                         idx = attr[*npar];
1722                 break;
1723         case 0: /* implemented defined (only foreground) */
1724         case 1: /* transparent */
1725         case 3: /* direct color in CMY space */
1726         case 4: /* direct color in CMYK space */
1727         default:
1728                 fprintf(stderr,
1729                         "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1730                 break;
1731         }
1732
1733         return idx;
1734 }
1735
1736 void
1737 tsetattr(int *attr, int l) {
1738         int i;
1739         int32_t idx;
1740
1741         for(i = 0; i < l; i++) {
1742                 switch(attr[i]) {
1743                 case 0:
1744                         term.c.attr.mode &= ~(
1745                                 ATTR_BOLD       |
1746                                 ATTR_FAINT      |
1747                                 ATTR_ITALIC     |
1748                                 ATTR_UNDERLINE  |
1749                                 ATTR_BLINK      |
1750                                 ATTR_REVERSE    |
1751                                 ATTR_INVISIBLE  |
1752                                 ATTR_STRUCK     );
1753                         term.c.attr.fg = defaultfg;
1754                         term.c.attr.bg = defaultbg;
1755                         break;
1756                 case 1:
1757                         term.c.attr.mode |= ATTR_BOLD;
1758                         break;
1759                 case 2:
1760                         term.c.attr.mode |= ATTR_FAINT;
1761                         break;
1762                 case 3:
1763                         term.c.attr.mode |= ATTR_ITALIC;
1764                         break;
1765                 case 4:
1766                         term.c.attr.mode |= ATTR_UNDERLINE;
1767                         break;
1768                 case 5: /* slow blink */
1769                         /* FALLTHROUGH */
1770                 case 6: /* rapid blink */
1771                         term.c.attr.mode |= ATTR_BLINK;
1772                         break;
1773                 case 7:
1774                         term.c.attr.mode |= ATTR_REVERSE;
1775                         break;
1776                 case 8:
1777                         term.c.attr.mode |= ATTR_INVISIBLE;
1778                         break;
1779                 case 9:
1780                         term.c.attr.mode |= ATTR_STRUCK;
1781                         break;
1782                 case 22:
1783                         term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1784                         break;
1785                 case 23:
1786                         term.c.attr.mode &= ~ATTR_ITALIC;
1787                         break;
1788                 case 24:
1789                         term.c.attr.mode &= ~ATTR_UNDERLINE;
1790                         break;
1791                 case 25:
1792                         term.c.attr.mode &= ~ATTR_BLINK;
1793                         break;
1794                 case 27:
1795                         term.c.attr.mode &= ~ATTR_REVERSE;
1796                         break;
1797                 case 28:
1798                         term.c.attr.mode &= ~ATTR_INVISIBLE;
1799                         break;
1800                 case 29:
1801                         term.c.attr.mode &= ~ATTR_STRUCK;
1802                         break;
1803                 case 38:
1804                         if ((idx = tdefcolor(attr, &i, l)) >= 0)
1805                                 term.c.attr.fg = idx;
1806                         break;
1807                 case 39:
1808                         term.c.attr.fg = defaultfg;
1809                         break;
1810                 case 48:
1811                         if ((idx = tdefcolor(attr, &i, l)) >= 0)
1812                                 term.c.attr.bg = idx;
1813                         break;
1814                 case 49:
1815                         term.c.attr.bg = defaultbg;
1816                         break;
1817                 default:
1818                         if(BETWEEN(attr[i], 30, 37)) {
1819                                 term.c.attr.fg = attr[i] - 30;
1820                         } else if(BETWEEN(attr[i], 40, 47)) {
1821                                 term.c.attr.bg = attr[i] - 40;
1822                         } else if(BETWEEN(attr[i], 90, 97)) {
1823                                 term.c.attr.fg = attr[i] - 90 + 8;
1824                         } else if(BETWEEN(attr[i], 100, 107)) {
1825                                 term.c.attr.bg = attr[i] - 100 + 8;
1826                         } else {
1827                                 fprintf(stderr,
1828                                         "erresc(default): gfx attr %d unknown\n",
1829                                         attr[i]), csidump();
1830                         }
1831                         break;
1832                 }
1833         }
1834 }
1835
1836 void
1837 tsetscroll(int t, int b) {
1838         int temp;
1839
1840         LIMIT(t, 0, term.row-1);
1841         LIMIT(b, 0, term.row-1);
1842         if(t > b) {
1843                 temp = t;
1844                 t = b;
1845                 b = temp;
1846         }
1847         term.top = t;
1848         term.bot = b;
1849 }
1850
1851 void
1852 tsetmode(bool priv, bool set, int *args, int narg) {
1853         int *lim, mode;
1854         bool alt;
1855
1856         for(lim = args + narg; args < lim; ++args) {
1857                 if(priv) {
1858                         switch(*args) {
1859                         case 1: /* DECCKM -- Cursor key */
1860                                 MODBIT(term.mode, set, MODE_APPCURSOR);
1861                                 break;
1862                         case 5: /* DECSCNM -- Reverse video */
1863                                 mode = term.mode;
1864                                 MODBIT(term.mode, set, MODE_REVERSE);
1865                                 if(mode != term.mode)
1866                                         redraw();
1867                                 break;
1868                         case 6: /* DECOM -- Origin */
1869                                 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1870                                 tmoveato(0, 0);
1871                                 break;
1872                         case 7: /* DECAWM -- Auto wrap */
1873                                 MODBIT(term.mode, set, MODE_WRAP);
1874                                 break;
1875                         case 0:  /* Error (IGNORED) */
1876                         case 2:  /* DECANM -- ANSI/VT52 (IGNORED) */
1877                         case 3:  /* DECCOLM -- Column  (IGNORED) */
1878                         case 4:  /* DECSCLM -- Scroll (IGNORED) */
1879                         case 8:  /* DECARM -- Auto repeat (IGNORED) */
1880                         case 18: /* DECPFF -- Printer feed (IGNORED) */
1881                         case 19: /* DECPEX -- Printer extent (IGNORED) */
1882                         case 42: /* DECNRCM -- National characters (IGNORED) */
1883                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
1884                                 break;
1885                         case 25: /* DECTCEM -- Text Cursor Enable Mode */
1886                                 MODBIT(term.mode, !set, MODE_HIDE);
1887                                 break;
1888                         case 9:    /* X10 mouse compatibility mode */
1889                                 xsetpointermotion(0);
1890                                 MODBIT(term.mode, 0, MODE_MOUSE);
1891                                 MODBIT(term.mode, set, MODE_MOUSEX10);
1892                                 break;
1893                         case 1000: /* 1000: report button press */
1894                                 xsetpointermotion(0);
1895                                 MODBIT(term.mode, 0, MODE_MOUSE);
1896                                 MODBIT(term.mode, set, MODE_MOUSEBTN);
1897                                 break;
1898                         case 1002: /* 1002: report motion on button press */
1899                                 xsetpointermotion(0);
1900                                 MODBIT(term.mode, 0, MODE_MOUSE);
1901                                 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1902                                 break;
1903                         case 1003: /* 1003: enable all mouse motions */
1904                                 xsetpointermotion(set);
1905                                 MODBIT(term.mode, 0, MODE_MOUSE);
1906                                 MODBIT(term.mode, set, MODE_MOUSEMANY);
1907                                 break;
1908                         case 1004: /* 1004: send focus events to tty */
1909                                 MODBIT(term.mode, set, MODE_FOCUS);
1910                                 break;
1911                         case 1006: /* 1006: extended reporting mode */
1912                                 MODBIT(term.mode, set, MODE_MOUSESGR);
1913                                 break;
1914                         case 1034:
1915                                 MODBIT(term.mode, set, MODE_8BIT);
1916                                 break;
1917                         case 1049: /* swap screen & set/restore cursor as xterm */
1918                                 if (!allowaltscreen)
1919                                         break;
1920                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1921                                 /* FALLTHROUGH */
1922                         case 47: /* swap screen */
1923                         case 1047:
1924                                 if (!allowaltscreen)
1925                                         break;
1926                                 alt = IS_SET(MODE_ALTSCREEN);
1927                                 if(alt) {
1928                                         tclearregion(0, 0, term.col-1,
1929                                                         term.row-1);
1930                                 }
1931                                 if(set ^ alt) /* set is always 1 or 0 */
1932                                         tswapscreen();
1933                                 if(*args != 1049)
1934                                         break;
1935                                 /* FALLTHROUGH */
1936                         case 1048:
1937                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1938                                 break;
1939                         case 2004: /* 2004: bracketed paste mode */
1940                                 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1941                                 break;
1942                         /* Not implemented mouse modes. See comments there. */
1943                         case 1001: /* mouse highlight mode; can hang the
1944                                       terminal by design when implemented. */
1945                         case 1005: /* UTF-8 mouse mode; will confuse
1946                                       applications not supporting UTF-8
1947                                       and luit. */
1948                         case 1015: /* urxvt mangled mouse mode; incompatible
1949                                       and can be mistaken for other control
1950                                       codes. */
1951                         default:
1952                                 fprintf(stderr,
1953                                         "erresc: unknown private set/reset mode %d\n",
1954                                         *args);
1955                                 break;
1956                         }
1957                 } else {
1958                         switch(*args) {
1959                         case 0:  /* Error (IGNORED) */
1960                                 break;
1961                         case 2:  /* KAM -- keyboard action */
1962                                 MODBIT(term.mode, set, MODE_KBDLOCK);
1963                                 break;
1964                         case 4:  /* IRM -- Insertion-replacement */
1965                                 MODBIT(term.mode, set, MODE_INSERT);
1966                                 break;
1967                         case 12: /* SRM -- Send/Receive */
1968                                 MODBIT(term.mode, !set, MODE_ECHO);
1969                                 break;
1970                         case 20: /* LNM -- Linefeed/new line */
1971                                 MODBIT(term.mode, set, MODE_CRLF);
1972                                 break;
1973                         default:
1974                                 fprintf(stderr,
1975                                         "erresc: unknown set/reset mode %d\n",
1976                                         *args);
1977                                 break;
1978                         }
1979                 }
1980         }
1981 }
1982
1983 void
1984 csihandle(void) {
1985         char buf[40];
1986         int len;
1987
1988         switch(csiescseq.mode) {
1989         default:
1990         unknown:
1991                 fprintf(stderr, "erresc: unknown csi ");
1992                 csidump();
1993                 /* die(""); */
1994                 break;
1995         case '@': /* ICH -- Insert <n> blank char */
1996                 DEFAULT(csiescseq.arg[0], 1);
1997                 tinsertblank(csiescseq.arg[0]);
1998                 break;
1999         case 'A': /* CUU -- Cursor <n> Up */
2000                 DEFAULT(csiescseq.arg[0], 1);
2001                 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2002                 break;
2003         case 'B': /* CUD -- Cursor <n> Down */
2004         case 'e': /* VPR --Cursor <n> Down */
2005                 DEFAULT(csiescseq.arg[0], 1);
2006                 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2007                 break;
2008         case 'i': /* MC -- Media Copy */
2009                 switch(csiescseq.arg[0]) {
2010                 case 0:
2011                         tdump();
2012                         break;
2013                 case 1:
2014                         tdumpline(term.c.y);
2015                         break;
2016                 case 2:
2017                         tdumpsel();
2018                         break;
2019                 case 4:
2020                         term.mode &= ~MODE_PRINT;
2021                         break;
2022                 case 5:
2023                         term.mode |= MODE_PRINT;
2024                         break;
2025                 }
2026                 break;
2027         case 'c': /* DA -- Device Attributes */
2028                 if(csiescseq.arg[0] == 0)
2029                         ttywrite(vtiden, sizeof(vtiden) - 1);
2030                 break;
2031         case 'C': /* CUF -- Cursor <n> Forward */
2032         case 'a': /* HPR -- Cursor <n> Forward */
2033                 DEFAULT(csiescseq.arg[0], 1);
2034                 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2035                 break;
2036         case 'D': /* CUB -- Cursor <n> Backward */
2037                 DEFAULT(csiescseq.arg[0], 1);
2038                 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2039                 break;
2040         case 'E': /* CNL -- Cursor <n> Down and first col */
2041                 DEFAULT(csiescseq.arg[0], 1);
2042                 tmoveto(0, term.c.y+csiescseq.arg[0]);
2043                 break;
2044         case 'F': /* CPL -- Cursor <n> Up and first col */
2045                 DEFAULT(csiescseq.arg[0], 1);
2046                 tmoveto(0, term.c.y-csiescseq.arg[0]);
2047                 break;
2048         case 'g': /* TBC -- Tabulation clear */
2049                 switch(csiescseq.arg[0]) {
2050                 case 0: /* clear current tab stop */
2051                         term.tabs[term.c.x] = 0;
2052                         break;
2053                 case 3: /* clear all the tabs */
2054                         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2055                         break;
2056                 default:
2057                         goto unknown;
2058                 }
2059                 break;
2060         case 'G': /* CHA -- Move to <col> */
2061         case '`': /* HPA */
2062                 DEFAULT(csiescseq.arg[0], 1);
2063                 tmoveto(csiescseq.arg[0]-1, term.c.y);
2064                 break;
2065         case 'H': /* CUP -- Move to <row> <col> */
2066         case 'f': /* HVP */
2067                 DEFAULT(csiescseq.arg[0], 1);
2068                 DEFAULT(csiescseq.arg[1], 1);
2069                 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2070                 break;
2071         case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2072                 DEFAULT(csiescseq.arg[0], 1);
2073                 tputtab(csiescseq.arg[0]);
2074                 break;
2075         case 'J': /* ED -- Clear screen */
2076                 selclear(NULL);
2077                 switch(csiescseq.arg[0]) {
2078                 case 0: /* below */
2079                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2080                         if(term.c.y < term.row-1) {
2081                                 tclearregion(0, term.c.y+1, term.col-1,
2082                                                 term.row-1);
2083                         }
2084                         break;
2085                 case 1: /* above */
2086                         if(term.c.y > 1)
2087                                 tclearregion(0, 0, term.col-1, term.c.y-1);
2088                         tclearregion(0, term.c.y, term.c.x, term.c.y);
2089                         break;
2090                 case 2: /* all */
2091                         tclearregion(0, 0, term.col-1, term.row-1);
2092                         break;
2093                 default:
2094                         goto unknown;
2095                 }
2096                 break;
2097         case 'K': /* EL -- Clear line */
2098                 switch(csiescseq.arg[0]) {
2099                 case 0: /* right */
2100                         tclearregion(term.c.x, term.c.y, term.col-1,
2101                                         term.c.y);
2102                         break;
2103                 case 1: /* left */
2104                         tclearregion(0, term.c.y, term.c.x, term.c.y);
2105                         break;
2106                 case 2: /* all */
2107                         tclearregion(0, term.c.y, term.col-1, term.c.y);
2108                         break;
2109                 }
2110                 break;
2111         case 'S': /* SU -- Scroll <n> line up */
2112                 DEFAULT(csiescseq.arg[0], 1);
2113                 tscrollup(term.top, csiescseq.arg[0]);
2114                 break;
2115         case 'T': /* SD -- Scroll <n> line down */
2116                 DEFAULT(csiescseq.arg[0], 1);
2117                 tscrolldown(term.top, csiescseq.arg[0]);
2118                 break;
2119         case 'L': /* IL -- Insert <n> blank lines */
2120                 DEFAULT(csiescseq.arg[0], 1);
2121                 tinsertblankline(csiescseq.arg[0]);
2122                 break;
2123         case 'l': /* RM -- Reset Mode */
2124                 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2125                 break;
2126         case 'M': /* DL -- Delete <n> lines */
2127                 DEFAULT(csiescseq.arg[0], 1);
2128                 tdeleteline(csiescseq.arg[0]);
2129                 break;
2130         case 'X': /* ECH -- Erase <n> char */
2131                 DEFAULT(csiescseq.arg[0], 1);
2132                 tclearregion(term.c.x, term.c.y,
2133                                 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2134                 break;
2135         case 'P': /* DCH -- Delete <n> char */
2136                 DEFAULT(csiescseq.arg[0], 1);
2137                 tdeletechar(csiescseq.arg[0]);
2138                 break;
2139         case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2140                 DEFAULT(csiescseq.arg[0], 1);
2141                 tputtab(-csiescseq.arg[0]);
2142                 break;
2143         case 'd': /* VPA -- Move to <row> */
2144                 DEFAULT(csiescseq.arg[0], 1);
2145                 tmoveato(term.c.x, csiescseq.arg[0]-1);
2146                 break;
2147         case 'h': /* SM -- Set terminal mode */
2148                 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2149                 break;
2150         case 'm': /* SGR -- Terminal attribute (color) */
2151                 tsetattr(csiescseq.arg, csiescseq.narg);
2152                 break;
2153         case 'n': /* DSR – Device Status Report (cursor position) */
2154                 if (csiescseq.arg[0] == 6) {
2155                         len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2156                                         term.c.y+1, term.c.x+1);
2157                         ttywrite(buf, len);
2158                 }
2159                 break;
2160         case 'r': /* DECSTBM -- Set Scrolling Region */
2161                 if(csiescseq.priv) {
2162                         goto unknown;
2163                 } else {
2164                         DEFAULT(csiescseq.arg[0], 1);
2165                         DEFAULT(csiescseq.arg[1], term.row);
2166                         tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2167                         tmoveato(0, 0);
2168                 }
2169                 break;
2170         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2171                 tcursor(CURSOR_SAVE);
2172                 break;
2173         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2174                 tcursor(CURSOR_LOAD);
2175                 break;
2176         }
2177 }
2178
2179 void
2180 csidump(void) {
2181         int i;
2182         uint c;
2183
2184         printf("ESC[");
2185         for(i = 0; i < csiescseq.len; i++) {
2186                 c = csiescseq.buf[i] & 0xff;
2187                 if(isprint(c)) {
2188                         putchar(c);
2189                 } else if(c == '\n') {
2190                         printf("(\\n)");
2191                 } else if(c == '\r') {
2192                         printf("(\\r)");
2193                 } else if(c == 0x1b) {
2194                         printf("(\\e)");
2195                 } else {
2196                         printf("(%02x)", c);
2197                 }
2198         }
2199         putchar('\n');
2200 }
2201
2202 void
2203 csireset(void) {
2204         memset(&csiescseq, 0, sizeof(csiescseq));
2205 }
2206
2207 void
2208 strhandle(void) {
2209         char *p = NULL;
2210         int j, narg, par;
2211
2212         term.esc &= ~(ESC_STR_END|ESC_STR);
2213         strparse();
2214         narg = strescseq.narg;
2215         par = atoi(strescseq.args[0]);
2216
2217         switch(strescseq.type) {
2218         case ']': /* OSC -- Operating System Command */
2219                 switch(par) {
2220                 case 0:
2221                 case 1:
2222                 case 2:
2223                         if(narg > 1)
2224                                 xsettitle(strescseq.args[1]);
2225                         return;
2226                 case 4: /* color set */
2227                         if(narg < 3)
2228                                 break;
2229                         p = strescseq.args[2];
2230                         /* FALLTHROUGH */
2231                 case 104: /* color reset, here p = NULL */
2232                         j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2233                         if(xsetcolorname(j, p)) {
2234                                 fprintf(stderr, "erresc: invalid color %s\n", p);
2235                         } else {
2236                                 /*
2237                                  * TODO if defaultbg color is changed, borders
2238                                  * are dirty
2239                                  */
2240                                 redraw();
2241                         }
2242                         return;
2243                 }
2244                 break;
2245         case 'k': /* old title set compatibility */
2246                 xsettitle(strescseq.args[0]);
2247                 return;
2248         case 'P': /* DCS -- Device Control String */
2249         case '_': /* APC -- Application Program Command */
2250         case '^': /* PM -- Privacy Message */
2251                 return;
2252         }
2253
2254         fprintf(stderr, "erresc: unknown str ");
2255         strdump();
2256 }
2257
2258 void
2259 strparse(void) {
2260         char *p = strescseq.buf;
2261
2262         strescseq.narg = 0;
2263         strescseq.buf[strescseq.len] = '\0';
2264         while(p && strescseq.narg < STR_ARG_SIZ)
2265                 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2266 }
2267
2268 void
2269 strdump(void) {
2270         int i;
2271         uint c;
2272
2273         printf("ESC%c", strescseq.type);
2274         for(i = 0; i < strescseq.len; i++) {
2275                 c = strescseq.buf[i] & 0xff;
2276                 if(c == '\0') {
2277                         return;
2278                 } else if(isprint(c)) {
2279                         putchar(c);
2280                 } else if(c == '\n') {
2281                         printf("(\\n)");
2282                 } else if(c == '\r') {
2283                         printf("(\\r)");
2284                 } else if(c == 0x1b) {
2285                         printf("(\\e)");
2286                 } else {
2287                         printf("(%02x)", c);
2288                 }
2289         }
2290         printf("ESC\\\n");
2291 }
2292
2293 void
2294 strreset(void) {
2295         memset(&strescseq, 0, sizeof(strescseq));
2296 }
2297
2298 void
2299 tprinter(char *s, size_t len) {
2300         if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2301                 fprintf(stderr, "Error writing in %s:%s\n",
2302                         opt_io, strerror(errno));
2303                 close(iofd);
2304                 iofd = -1;
2305         }
2306 }
2307
2308 void
2309 toggleprinter(const Arg *arg) {
2310         term.mode ^= MODE_PRINT;
2311 }
2312
2313 void
2314 printscreen(const Arg *arg) {
2315         tdump();
2316 }
2317
2318 void
2319 printsel(const Arg *arg) {
2320         tdumpsel();
2321 }
2322
2323 void
2324 tdumpsel(void) {
2325         char *ptr;
2326
2327         if((ptr = getsel())) {
2328                 tprinter(ptr, strlen(ptr));
2329                 free(ptr);
2330         }
2331 }
2332
2333 void
2334 tdumpline(int n) {
2335         Glyph *bp, *end;
2336
2337         bp = &term.line[n][0];
2338         end = &bp[MIN(tlinelen(n), term.col) - 1];
2339         if(bp != end || bp->c[0] != ' ') {
2340                 for( ;bp <= end; ++bp)
2341                         tprinter(bp->c, utf8len(bp->c));
2342         }
2343         tprinter("\n", 1);
2344 }
2345
2346 void
2347 tdump(void) {
2348         int i;
2349
2350         for(i = 0; i < term.row; ++i)
2351                 tdumpline(i);
2352 }
2353
2354 void
2355 tputtab(int n) {
2356         uint x = term.c.x;
2357
2358         if(n > 0) {
2359                 while(x < term.col && n--)
2360                         for(++x; x < term.col && !term.tabs[x]; ++x)
2361                                 /* nothing */ ;
2362         } else if(n < 0) {
2363                 while(x > 0 && n++)
2364                         for(--x; x > 0 && !term.tabs[x]; --x)
2365                                 /* nothing */ ;
2366         }
2367         tmoveto(x, term.c.y);
2368 }
2369
2370 void
2371 techo(char *buf, int len) {
2372         for(; len > 0; buf++, len--) {
2373                 char c = *buf;
2374
2375                 if(ISCONTROL((uchar) c)) { /* control code */
2376                         if(c & 0x80) {
2377                                 c &= 0x7f;
2378                                 tputc("^", 1);
2379                                 tputc("[", 1);
2380                         } else if(c != '\n' && c != '\r' && c != '\t') {
2381                                 c ^= 0x40;
2382                                 tputc("^", 1);
2383                         }
2384                         tputc(&c, 1);
2385                 } else {
2386                         break;
2387                 }
2388         }
2389         if(len)
2390                 tputc(buf, len);
2391 }
2392
2393 void
2394 tdeftran(char ascii) {
2395         static char cs[] = "0B";
2396         static int vcs[] = {CS_GRAPHIC0, CS_USA};
2397         char *p;
2398
2399         if((p = strchr(cs, ascii)) == NULL) {
2400                 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2401         } else {
2402                 term.trantbl[term.icharset] = vcs[p - cs];
2403         }
2404 }
2405
2406 void
2407 tdectest(char c) {
2408         static char E[UTF_SIZ] = "E";
2409         int x, y;
2410
2411         if(c == '8') { /* DEC screen alignment test. */
2412                 for(x = 0; x < term.col; ++x) {
2413                         for(y = 0; y < term.row; ++y)
2414                                 tsetchar(E, &term.c.attr, x, y);
2415                 }
2416         }
2417 }
2418
2419 void
2420 tstrsequence(uchar c) {
2421         if (c & 0x80) {
2422                 switch (c) {
2423                 case 0x90:   /* DCS -- Device Control String */
2424                         c = 'P';
2425                         break;
2426                 case 0x9f:   /* APC -- Application Program Command */
2427                         c = '_';
2428                         break;
2429                 case 0x9e:   /* PM -- Privacy Message */
2430                         c = '^';
2431                         break;
2432                 case 0x9d:   /* OSC -- Operating System Command */
2433                         c = ']';
2434                         break;
2435                 }
2436         }
2437         strreset();
2438         strescseq.type = c;
2439         term.esc |= ESC_STR;
2440         return;
2441 }
2442
2443 void
2444 tcontrolcode(uchar ascii) {
2445         static char question[UTF_SIZ] = "?";
2446
2447         switch(ascii) {
2448         case '\t':   /* HT */
2449                 tputtab(1);
2450                 return;
2451         case '\b':   /* BS */
2452                 tmoveto(term.c.x-1, term.c.y);
2453                 return;
2454         case '\r':   /* CR */
2455                 tmoveto(0, term.c.y);
2456                 return;
2457         case '\f':   /* LF */
2458         case '\v':   /* VT */
2459         case '\n':   /* LF */
2460                 /* go to first col if the mode is set */
2461                 tnewline(IS_SET(MODE_CRLF));
2462                 return;
2463         case '\a':   /* BEL */
2464                 if(term.esc & ESC_STR_END) {
2465                         /* backwards compatibility to xterm */
2466                         strhandle();
2467                 } else {
2468                         if(!(xw.state & WIN_FOCUSED))
2469                                 xseturgency(1);
2470                         if (bellvolume)
2471                                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2472                 }
2473                 break;
2474         case '\033': /* ESC */
2475                 csireset();
2476                 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2477                 term.esc |= ESC_START;
2478                 return;
2479         case '\016': /* SO (LS1 -- Locking shift 1) */
2480         case '\017': /* SI (LS0 -- Locking shift 0) */
2481                 term.charset = 1 - (ascii - '\016');
2482                 return;
2483         case '\032': /* SUB */
2484                 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2485         case '\030': /* CAN */
2486                 csireset();
2487                 break;
2488         case '\005': /* ENQ (IGNORED) */
2489         case '\000': /* NUL (IGNORED) */
2490         case '\021': /* XON (IGNORED) */
2491         case '\023': /* XOFF (IGNORED) */
2492         case 0177:   /* DEL (IGNORED) */
2493                 return;
2494         case 0x84:   /* TODO: IND */
2495                 break;
2496         case 0x85:   /* NEL -- Next line */
2497                 tnewline(1); /* always go to first col */
2498                 break;
2499         case 0x88:   /* HTS -- Horizontal tab stop */
2500                 term.tabs[term.c.x] = 1;
2501                 break;
2502         case 0x8d:   /* TODO: RI */
2503         case 0x8e:   /* TODO: SS2 */
2504         case 0x8f:   /* TODO: SS3 */
2505         case 0x98:   /* TODO: SOS */
2506                 break;
2507         case 0x9a:   /* DECID -- Identify Terminal */
2508                 ttywrite(vtiden, sizeof(vtiden) - 1);
2509                 break;
2510         case 0x9b:   /* TODO: CSI */
2511         case 0x9c:   /* TODO: ST */
2512                 break;
2513         case 0x90:   /* DCS -- Device Control String */
2514         case 0x9f:   /* APC -- Application Program Command */
2515         case 0x9e:   /* PM -- Privacy Message */
2516         case 0x9d:   /* OSC -- Operating System Command */
2517                 tstrsequence(ascii);
2518                 return;
2519         }
2520         /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2521         term.esc &= ~(ESC_STR_END|ESC_STR);
2522         return;
2523 }
2524
2525 /*
2526  * returns 1 when the sequence is finished and it hasn't to read
2527  * more characters for this sequence, otherwise 0
2528  */
2529 int
2530 eschandle(uchar ascii) {
2531         switch(ascii) {
2532         case '[':
2533                 term.esc |= ESC_CSI;
2534                 return 0;
2535         case '#':
2536                 term.esc |= ESC_TEST;
2537                 return 0;
2538         case 'P': /* DCS -- Device Control String */
2539         case '_': /* APC -- Application Program Command */
2540         case '^': /* PM -- Privacy Message */
2541         case ']': /* OSC -- Operating System Command */
2542         case 'k': /* old title set compatibility */
2543                 tstrsequence(ascii);
2544                 return 0;
2545         case 'n': /* LS2 -- Locking shift 2 */
2546         case 'o': /* LS3 -- Locking shift 3 */
2547                 term.charset = 2 + (ascii - 'n');
2548                 break;
2549         case '(': /* GZD4 -- set primary charset G0 */
2550         case ')': /* G1D4 -- set secondary charset G1 */
2551         case '*': /* G2D4 -- set tertiary charset G2 */
2552         case '+': /* G3D4 -- set quaternary charset G3 */
2553                 term.icharset = ascii - '(';
2554                 term.esc |= ESC_ALTCHARSET;
2555                 return 0;
2556         case 'D': /* IND -- Linefeed */
2557                 if(term.c.y == term.bot) {
2558                         tscrollup(term.top, 1);
2559                 } else {
2560                         tmoveto(term.c.x, term.c.y+1);
2561                 }
2562                 break;
2563         case 'E': /* NEL -- Next line */
2564                 tnewline(1); /* always go to first col */
2565                 break;
2566         case 'H': /* HTS -- Horizontal tab stop */
2567                 term.tabs[term.c.x] = 1;
2568                 break;
2569         case 'M': /* RI -- Reverse index */
2570                 if(term.c.y == term.top) {
2571                         tscrolldown(term.top, 1);
2572                 } else {
2573                         tmoveto(term.c.x, term.c.y-1);
2574                 }
2575                 break;
2576         case 'Z': /* DECID -- Identify Terminal */
2577                 ttywrite(vtiden, sizeof(vtiden) - 1);
2578                 break;
2579         case 'c': /* RIS -- Reset to inital state */
2580                 treset();
2581                 xresettitle();
2582                 xloadcols();
2583                 break;
2584         case '=': /* DECPAM -- Application keypad */
2585                 term.mode |= MODE_APPKEYPAD;
2586                 break;
2587         case '>': /* DECPNM -- Normal keypad */
2588                 term.mode &= ~MODE_APPKEYPAD;
2589                 break;
2590         case '7': /* DECSC -- Save Cursor */
2591                 tcursor(CURSOR_SAVE);
2592                 break;
2593         case '8': /* DECRC -- Restore Cursor */
2594                 tcursor(CURSOR_LOAD);
2595                 break;
2596         case '\\': /* ST -- String Terminator */
2597                 if(term.esc & ESC_STR_END)
2598                         strhandle();
2599                 break;
2600         default:
2601                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2602                         (uchar) ascii, isprint(ascii)? ascii:'.');
2603                 break;
2604         }
2605         return 1;
2606 }
2607
2608 void
2609 tputc(char *c, int len) {
2610         uchar ascii;
2611         bool control;
2612         long unicodep;
2613         int width;
2614         Glyph *gp;
2615
2616         if(len == 1) {
2617                 width = 1;
2618                 unicodep = ascii = *c;
2619         } else {
2620                 utf8decode(c, &unicodep, UTF_SIZ);
2621                 if ((width = wcwidth(unicodep)) == -1) {
2622                         c = "\357\277\275";     /* UTF_INVALID */
2623                         width = 1;
2624                 }
2625                 control = ISCONTROLC1(unicodep);
2626                 ascii = unicodep;
2627         }
2628
2629         if(IS_SET(MODE_PRINT))
2630                 tprinter(c, len);
2631         control = ISCONTROL(unicodep);
2632
2633         /*
2634          * STR sequence must be checked before anything else
2635          * because it uses all following characters until it
2636          * receives a ESC, a SUB, a ST or any other C1 control
2637          * character.
2638          */
2639         if(term.esc & ESC_STR) {
2640                 if(width == 1 &&
2641                    (ascii == '\a' || ascii == 030 ||
2642                     ascii == 032  || ascii == 033 ||
2643                     ISCONTROLC1(unicodep))) {
2644                         term.esc &= ~(ESC_START|ESC_STR);
2645                         term.esc |= ESC_STR_END;
2646                 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2647                         memmove(&strescseq.buf[strescseq.len], c, len);
2648                         strescseq.len += len;
2649                         return;
2650                 } else {
2651                 /*
2652                  * Here is a bug in terminals. If the user never sends
2653                  * some code to stop the str or esc command, then st
2654                  * will stop responding. But this is better than
2655                  * silently failing with unknown characters. At least
2656                  * then users will report back.
2657                  *
2658                  * In the case users ever get fixed, here is the code:
2659                  */
2660                 /*
2661                  * term.esc = 0;
2662                  * strhandle();
2663                  */
2664                         return;
2665                 }
2666         }
2667
2668         /*
2669          * Actions of control codes must be performed as soon they arrive
2670          * because they can be embedded inside a control sequence, and
2671          * they must not cause conflicts with sequences.
2672          */
2673         if(control) {
2674                 tcontrolcode(ascii);
2675                 /*
2676                  * control codes are not shown ever
2677                  */
2678                 return;
2679         } else if(term.esc & ESC_START) {
2680                 if(term.esc & ESC_CSI) {
2681                         csiescseq.buf[csiescseq.len++] = ascii;
2682                         if(BETWEEN(ascii, 0x40, 0x7E)
2683                                         || csiescseq.len >= \
2684                                         sizeof(csiescseq.buf)-1) {
2685                                 term.esc = 0;
2686                                 csiparse();
2687                                 csihandle();
2688                         }
2689                         return;
2690                 } else if(term.esc & ESC_ALTCHARSET) {
2691                         tdeftran(ascii);
2692                 } else if(term.esc & ESC_TEST) {
2693                         tdectest(ascii);
2694                 } else {
2695                         if (!eschandle(ascii))
2696                                 return;
2697                         /* sequence already finished */
2698                 }
2699                 term.esc = 0;
2700                 /*
2701                  * All characters which form part of a sequence are not
2702                  * printed
2703                  */
2704                 return;
2705         }
2706         if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2707                 selclear(NULL);
2708
2709         gp = &term.line[term.c.y][term.c.x];
2710         if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2711                 gp->mode |= ATTR_WRAP;
2712                 tnewline(1);
2713                 gp = &term.line[term.c.y][term.c.x];
2714         }
2715
2716         if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2717                 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2718
2719         if(term.c.x+width > term.col) {
2720                 tnewline(1);
2721                 gp = &term.line[term.c.y][term.c.x];
2722         }
2723
2724         tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2725
2726         if(width == 2) {
2727                 gp->mode |= ATTR_WIDE;
2728                 if(term.c.x+1 < term.col) {
2729                         gp[1].c[0] = '\0';
2730                         gp[1].mode = ATTR_WDUMMY;
2731                 }
2732         }
2733         if(term.c.x+width < term.col) {
2734                 tmoveto(term.c.x+width, term.c.y);
2735         } else {
2736                 term.c.state |= CURSOR_WRAPNEXT;
2737         }
2738 }
2739
2740 void
2741 tresize(int col, int row) {
2742         int i;
2743         int minrow = MIN(row, term.row);
2744         int mincol = MIN(col, term.col);
2745         int slide = term.c.y - row + 1;
2746         bool *bp;
2747         TCursor c;
2748
2749         if(col < 1 || row < 1) {
2750                 fprintf(stderr,
2751                         "tresize: error resizing to %dx%d\n", col, row);
2752                 return;
2753         }
2754
2755         /* free unneeded rows */
2756         i = 0;
2757         if(slide > 0) {
2758                 /*
2759                  * slide screen to keep cursor where we expect it -
2760                  * tscrollup would work here, but we can optimize to
2761                  * memmove because we're freeing the earlier lines
2762                  */
2763                 for(/* i = 0 */; i < slide; i++) {
2764                         free(term.line[i]);
2765                         free(term.alt[i]);
2766                 }
2767                 memmove(term.line, term.line + slide, row * sizeof(Line));
2768                 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2769         }
2770         for(i += row; i < term.row; i++) {
2771                 free(term.line[i]);
2772                 free(term.alt[i]);
2773         }
2774
2775         /* resize to new height */
2776         term.line = xrealloc(term.line, row * sizeof(Line));
2777         term.alt  = xrealloc(term.alt,  row * sizeof(Line));
2778         term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2779         term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2780
2781         /* resize each row to new width, zero-pad if needed */
2782         for(i = 0; i < minrow; i++) {
2783                 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2784                 term.alt[i]  = xrealloc(term.alt[i],  col * sizeof(Glyph));
2785         }
2786
2787         /* allocate any new rows */
2788         for(/* i == minrow */; i < row; i++) {
2789                 term.line[i] = xmalloc(col * sizeof(Glyph));
2790                 term.alt[i] = xmalloc(col * sizeof(Glyph));
2791         }
2792         if(col > term.col) {
2793                 bp = term.tabs + term.col;
2794
2795                 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2796                 while(--bp > term.tabs && !*bp)
2797                         /* nothing */ ;
2798                 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2799                         *bp = 1;
2800         }
2801         /* update terminal size */
2802         term.col = col;
2803         term.row = row;
2804         /* reset scrolling region */
2805         tsetscroll(0, row-1);
2806         /* make use of the LIMIT in tmoveto */
2807         tmoveto(term.c.x, term.c.y);
2808         /* Clearing both screens (it makes dirty all lines) */
2809         c = term.c;
2810         for(i = 0; i < 2; i++) {
2811                 if(mincol < col && 0 < minrow) {
2812                         tclearregion(mincol, 0, col - 1, minrow - 1);
2813                 }
2814                 if(0 < col && minrow < row) {
2815                         tclearregion(0, minrow, col - 1, row - 1);
2816                 }
2817                 tswapscreen();
2818                 tcursor(CURSOR_LOAD);
2819         }
2820         term.c = c;
2821 }
2822
2823 void
2824 xresize(int col, int row) {
2825         xw.tw = MAX(1, col * xw.cw);
2826         xw.th = MAX(1, row * xw.ch);
2827
2828         XFreePixmap(xw.dpy, xw.buf);
2829         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2830                         DefaultDepth(xw.dpy, xw.scr));
2831         XftDrawChange(xw.draw, xw.buf);
2832         xclear(0, 0, xw.w, xw.h);
2833 }
2834
2835 static inline ushort
2836 sixd_to_16bit(int x) {
2837         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2838 }
2839
2840 void
2841 xloadcols(void) {
2842         int i;
2843         XRenderColor color = { .alpha = 0xffff };
2844         static bool loaded;
2845         Color *cp;
2846
2847         if(loaded) {
2848                 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2849                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2850         }
2851
2852         /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2853         for(i = 0; i < LEN(colorname); i++) {
2854                 if(!colorname[i])
2855                         continue;
2856                 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2857                         die("Could not allocate color '%s'\n", colorname[i]);
2858                 }
2859         }
2860
2861         /* load colors [16-231] ; same colors as xterm */
2862         for(i = 16; i < 6*6*6+16; i++) {
2863                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
2864                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2865                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
2866                 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2867                         die("Could not allocate color %d\n", i);
2868         }
2869
2870         /* load colors [232-255] ; grayscale */
2871         for(; i < 256; i++) {
2872                 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2873                 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2874                         die("Could not allocate color %d\n", i);
2875         }
2876         loaded = true;
2877 }
2878
2879 int
2880 xsetcolorname(int x, const char *name) {
2881         XRenderColor color = { .alpha = 0xffff };
2882         Color ncolor;
2883
2884         if(!BETWEEN(x, 0, LEN(colorname)))
2885                 return 1;
2886
2887         if(!name) {
2888                 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2889                         color.red   = sixd_to_16bit( ((x-16)/36)%6 );
2890                         color.green = sixd_to_16bit( ((x-16)/6) %6 );
2891                         color.blue  = sixd_to_16bit( ((x-16)/1) %6 );
2892                         if(!XftColorAllocValue(xw.dpy, xw.vis,
2893                                                 xw.cmap, &color, &ncolor)) {
2894                                 return 1;
2895                         }
2896
2897                         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2898                         dc.col[x] = ncolor;
2899                         return 0;
2900                 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2901                         color.red = color.green = color.blue = \
2902                                     0x0808 + 0x0a0a * (x - (16 + 216));
2903                         if(!XftColorAllocValue(xw.dpy, xw.vis,
2904                                                 xw.cmap, &color, &ncolor)) {
2905                                 return 1;
2906                         }
2907
2908                         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2909                         dc.col[x] = ncolor;
2910                         return 0;
2911                 } else { /* system colors */
2912                         name = colorname[x];
2913                 }
2914         }
2915         if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2916                 return 1;
2917
2918         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2919         dc.col[x] = ncolor;
2920         return 0;
2921 }
2922
2923 void
2924 xtermclear(int col1, int row1, int col2, int row2) {
2925         XftDrawRect(xw.draw,
2926                         &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2927                         borderpx + col1 * xw.cw,
2928                         borderpx + row1 * xw.ch,
2929                         (col2-col1+1) * xw.cw,
2930                         (row2-row1+1) * xw.ch);
2931 }
2932
2933 /*
2934  * Absolute coordinates.
2935  */
2936 void
2937 xclear(int x1, int y1, int x2, int y2) {
2938         XftDrawRect(xw.draw,
2939                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2940                         x1, y1, x2-x1, y2-y1);
2941 }
2942
2943 void
2944 xhints(void) {
2945         XClassHint class = {opt_class ? opt_class : termname, termname};
2946         XWMHints wm = {.flags = InputHint, .input = 1};
2947         XSizeHints *sizeh = NULL;
2948
2949         sizeh = XAllocSizeHints();
2950
2951         sizeh->flags = PSize | PResizeInc | PBaseSize;
2952         sizeh->height = xw.h;
2953         sizeh->width = xw.w;
2954         sizeh->height_inc = xw.ch;
2955         sizeh->width_inc = xw.cw;
2956         sizeh->base_height = 2 * borderpx;
2957         sizeh->base_width = 2 * borderpx;
2958         if(xw.isfixed == True) {
2959                 sizeh->flags |= PMaxSize | PMinSize;
2960                 sizeh->min_width = sizeh->max_width = xw.w;
2961                 sizeh->min_height = sizeh->max_height = xw.h;
2962         }
2963         if(xw.gm & (XValue|YValue)) {
2964                 sizeh->flags |= USPosition | PWinGravity;
2965                 sizeh->x = xw.l;
2966                 sizeh->y = xw.t;
2967                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2968         }
2969
2970         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2971                         &class);
2972         XFree(sizeh);
2973 }
2974
2975 int
2976 xgeommasktogravity(int mask) {
2977         switch(mask & (XNegative|YNegative)) {
2978         case 0:
2979                 return NorthWestGravity;
2980         case XNegative:
2981                 return NorthEastGravity;
2982         case YNegative:
2983                 return SouthWestGravity;
2984         }
2985         return SouthEastGravity;
2986 }
2987
2988 int
2989 xloadfont(Font *f, FcPattern *pattern) {
2990         FcPattern *match;
2991         FcResult result;
2992
2993         match = FcFontMatch(NULL, pattern, &result);
2994         if(!match)
2995                 return 1;
2996
2997         if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2998                 FcPatternDestroy(match);
2999                 return 1;
3000         }
3001
3002         f->set = NULL;
3003         f->pattern = FcPatternDuplicate(pattern);
3004
3005         f->ascent = f->match->ascent;
3006         f->descent = f->match->descent;
3007         f->lbearing = 0;
3008         f->rbearing = f->match->max_advance_width;
3009
3010         f->height = f->ascent + f->descent;
3011         f->width = f->lbearing + f->rbearing;
3012
3013         return 0;
3014 }
3015
3016 void
3017 xloadfonts(char *fontstr, double fontsize) {
3018         FcPattern *pattern;
3019         FcResult r_sz, r_psz;
3020         double fontval;
3021         float ceilf(float);
3022
3023         if(fontstr[0] == '-') {
3024                 pattern = XftXlfdParse(fontstr, False, False);
3025         } else {
3026                 pattern = FcNameParse((FcChar8 *)fontstr);
3027         }
3028
3029         if(!pattern)
3030                 die("st: can't open font %s\n", fontstr);
3031
3032         if(fontsize > 1) {
3033                 FcPatternDel(pattern, FC_PIXEL_SIZE);
3034                 FcPatternDel(pattern, FC_SIZE);
3035                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3036                 usedfontsize = fontsize;
3037         } else {
3038                 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3039                 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3040                 if(r_psz == FcResultMatch) {
3041                         usedfontsize = fontval;
3042                 } else if(r_sz == FcResultMatch) {
3043                         usedfontsize = -1;
3044                 } else {
3045                         /*
3046                          * Default font size is 12, if none given. This is to
3047                          * have a known usedfontsize value.
3048                          */
3049                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3050                         usedfontsize = 12;
3051                 }
3052                 defaultfontsize = usedfontsize;
3053         }
3054
3055         FcConfigSubstitute(0, pattern, FcMatchPattern);
3056         FcDefaultSubstitute(pattern);
3057
3058         if(xloadfont(&dc.font, pattern))
3059                 die("st: can't open font %s\n", fontstr);
3060
3061         if(usedfontsize < 0) {
3062                 FcPatternGetDouble(dc.font.match->pattern,
3063                                    FC_PIXEL_SIZE, 0, &fontval);
3064                 usedfontsize = fontval;
3065                 if(fontsize == 0)
3066                         defaultfontsize = fontval;
3067         }
3068
3069         /* Setting character width and height. */
3070         xw.cw = ceilf(dc.font.width * cwscale);
3071         xw.ch = ceilf(dc.font.height * chscale);
3072
3073         FcPatternDel(pattern, FC_SLANT);
3074         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3075         if(xloadfont(&dc.ifont, pattern))
3076                 die("st: can't open font %s\n", fontstr);
3077
3078         FcPatternDel(pattern, FC_WEIGHT);
3079         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3080         if(xloadfont(&dc.ibfont, pattern))
3081                 die("st: can't open font %s\n", fontstr);
3082
3083         FcPatternDel(pattern, FC_SLANT);
3084         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3085         if(xloadfont(&dc.bfont, pattern))
3086                 die("st: can't open font %s\n", fontstr);
3087
3088         FcPatternDestroy(pattern);
3089 }
3090
3091 int
3092 xloadfontset(Font *f) {
3093         FcResult result;
3094
3095         if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3096                 return 1;
3097         return 0;
3098 }
3099
3100 void
3101 xunloadfont(Font *f) {
3102         XftFontClose(xw.dpy, f->match);
3103         FcPatternDestroy(f->pattern);
3104         if(f->set)
3105                 FcFontSetDestroy(f->set);
3106 }
3107
3108 void
3109 xunloadfonts(void) {
3110         /* Free the loaded fonts in the font cache.  */
3111         while(frclen > 0)
3112                 XftFontClose(xw.dpy, frc[--frclen].font);
3113
3114         xunloadfont(&dc.font);
3115         xunloadfont(&dc.bfont);
3116         xunloadfont(&dc.ifont);
3117         xunloadfont(&dc.ibfont);
3118 }
3119
3120 void
3121 xzoom(const Arg *arg) {
3122         Arg larg;
3123
3124         larg.i = usedfontsize + arg->i;
3125         xzoomabs(&larg);
3126 }
3127
3128 void
3129 xzoomabs(const Arg *arg) {
3130         xunloadfonts();
3131         xloadfonts(usedfont, arg->i);
3132         cresize(0, 0);
3133         redraw();
3134         xhints();
3135 }
3136
3137 void
3138 xzoomreset(const Arg *arg) {
3139         Arg larg;
3140
3141         if(defaultfontsize > 0) {
3142                 larg.i = defaultfontsize;
3143                 xzoomabs(&larg);
3144         }
3145 }
3146
3147 void
3148 xinit(void) {
3149         XGCValues gcvalues;
3150         Cursor cursor;
3151         Window parent;
3152         pid_t thispid = getpid();
3153
3154         if(!(xw.dpy = XOpenDisplay(NULL)))
3155                 die("Can't open display\n");
3156         xw.scr = XDefaultScreen(xw.dpy);
3157         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3158
3159         /* font */
3160         if(!FcInit())
3161                 die("Could not init fontconfig.\n");
3162
3163         usedfont = (opt_font == NULL)? font : opt_font;
3164         xloadfonts(usedfont, 0);
3165
3166         /* colors */
3167         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3168         xloadcols();
3169
3170         /* adjust fixed window geometry */
3171         xw.w = 2 * borderpx + term.col * xw.cw;
3172         xw.h = 2 * borderpx + term.row * xw.ch;
3173         if(xw.gm & XNegative)
3174                 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3175         if(xw.gm & YNegative)
3176                 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3177
3178         /* Events */
3179         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3180         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3181         xw.attrs.bit_gravity = NorthWestGravity;
3182         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3183                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3184                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3185         xw.attrs.colormap = xw.cmap;
3186
3187         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3188                 parent = XRootWindow(xw.dpy, xw.scr);
3189         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3190                         xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3191                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3192                         | CWEventMask | CWColormap, &xw.attrs);
3193
3194         memset(&gcvalues, 0, sizeof(gcvalues));
3195         gcvalues.graphics_exposures = False;
3196         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3197                         &gcvalues);
3198         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3199                         DefaultDepth(xw.dpy, xw.scr));
3200         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3201         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3202
3203         /* Xft rendering context */
3204         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3205
3206         /* input methods */
3207         if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3208                 XSetLocaleModifiers("@im=local");
3209                 if((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3210                         XSetLocaleModifiers("@im=");
3211                         if((xw.xim = XOpenIM(xw.dpy,
3212                                         NULL, NULL, NULL)) == NULL) {
3213                                 die("XOpenIM failed. Could not open input"
3214                                         " device.\n");
3215                         }
3216                 }
3217         }
3218         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3219                                            | XIMStatusNothing, XNClientWindow, xw.win,
3220                                            XNFocusWindow, xw.win, NULL);
3221         if(xw.xic == NULL)
3222                 die("XCreateIC failed. Could not obtain input method.\n");
3223
3224         /* white cursor, black outline */
3225         cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3226         XDefineCursor(xw.dpy, xw.win, cursor);
3227         XRecolorCursor(xw.dpy, cursor,
3228                 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3229                 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3230
3231         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3232         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3233         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3234         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3235
3236         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3237         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3238                         PropModeReplace, (uchar *)&thispid, 1);
3239
3240         xresettitle();
3241         XMapWindow(xw.dpy, xw.win);
3242         xhints();
3243         XSync(xw.dpy, False);
3244 }
3245
3246 void
3247 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3248         int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3249             width = charlen * xw.cw, xp, i;
3250         int frcflags, charexists;
3251         int u8fl, u8fblen, u8cblen, doesexist;
3252         char *u8c, *u8fs;
3253         long unicodep;
3254         Font *font = &dc.font;
3255         FcResult fcres;
3256         FcPattern *fcpattern, *fontpattern;
3257         FcFontSet *fcsets[] = { NULL };
3258         FcCharSet *fccharset;
3259         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3260         XRenderColor colfg, colbg;
3261         XRectangle r;
3262         int oneatatime;
3263
3264         frcflags = FRC_NORMAL;
3265
3266         if(base.mode & ATTR_ITALIC) {
3267                 if(base.fg == defaultfg)
3268                         base.fg = defaultitalic;
3269                 font = &dc.ifont;
3270                 frcflags = FRC_ITALIC;
3271         } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3272                 if(base.fg == defaultfg)
3273                         base.fg = defaultitalic;
3274                 font = &dc.ibfont;
3275                 frcflags = FRC_ITALICBOLD;
3276         } else if(base.mode & ATTR_UNDERLINE) {
3277                 if(base.fg == defaultfg)
3278                         base.fg = defaultunderline;
3279         }
3280
3281         if(IS_TRUECOL(base.fg)) {
3282                 colfg.alpha = 0xffff;
3283                 colfg.red = TRUERED(base.fg);
3284                 colfg.green = TRUEGREEN(base.fg);
3285                 colfg.blue = TRUEBLUE(base.fg);
3286                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3287                 fg = &truefg;
3288         } else {
3289                 fg = &dc.col[base.fg];
3290         }
3291
3292         if(IS_TRUECOL(base.bg)) {
3293                 colbg.alpha = 0xffff;
3294                 colbg.green = TRUEGREEN(base.bg);
3295                 colbg.red = TRUERED(base.bg);
3296                 colbg.blue = TRUEBLUE(base.bg);
3297                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3298                 bg = &truebg;
3299         } else {
3300                 bg = &dc.col[base.bg];
3301         }
3302
3303         if(base.mode & ATTR_BOLD) {
3304                 /*
3305                  * change basic system colors [0-7]
3306                  * to bright system colors [8-15]
3307                  */
3308                 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3309                         fg = &dc.col[base.fg + 8];
3310
3311                 if(base.mode & ATTR_ITALIC) {
3312                         font = &dc.ibfont;
3313                         frcflags = FRC_ITALICBOLD;
3314                 } else {
3315                         font = &dc.bfont;
3316                         frcflags = FRC_BOLD;
3317                 }
3318         }
3319
3320         if(IS_SET(MODE_REVERSE)) {
3321                 if(fg == &dc.col[defaultfg]) {
3322                         fg = &dc.col[defaultbg];
3323                 } else {
3324                         colfg.red = ~fg->color.red;
3325                         colfg.green = ~fg->color.green;
3326                         colfg.blue = ~fg->color.blue;
3327                         colfg.alpha = fg->color.alpha;
3328                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3329                                         &revfg);
3330                         fg = &revfg;
3331                 }
3332
3333                 if(bg == &dc.col[defaultbg]) {
3334                         bg = &dc.col[defaultfg];
3335                 } else {
3336                         colbg.red = ~bg->color.red;
3337                         colbg.green = ~bg->color.green;
3338                         colbg.blue = ~bg->color.blue;
3339                         colbg.alpha = bg->color.alpha;
3340                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3341                                         &revbg);
3342                         bg = &revbg;
3343                 }
3344         }
3345
3346         if(base.mode & ATTR_REVERSE) {
3347                 temp = fg;
3348                 fg = bg;
3349                 bg = temp;
3350         }
3351
3352         if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3353                 colfg.red = fg->color.red / 2;
3354                 colfg.green = fg->color.green / 2;
3355                 colfg.blue = fg->color.blue / 2;
3356                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3357                 fg = &revfg;
3358         }
3359
3360         if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3361                 fg = bg;
3362
3363         if(base.mode & ATTR_INVISIBLE)
3364                 fg = bg;
3365
3366         /* Intelligent cleaning up of the borders. */
3367         if(x == 0) {
3368                 xclear(0, (y == 0)? 0 : winy, borderpx,
3369                         winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3370         }
3371         if(x + charlen >= term.col) {
3372                 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3373                         ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3374         }
3375         if(y == 0)
3376                 xclear(winx, 0, winx + width, borderpx);
3377         if(y == term.row-1)
3378                 xclear(winx, winy + xw.ch, winx + width, xw.h);
3379
3380         /* Clean up the region we want to draw to. */
3381         XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3382
3383         /* Set the clip region because Xft is sometimes dirty. */
3384         r.x = 0;
3385         r.y = 0;
3386         r.height = xw.ch;
3387         r.width = width;
3388         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3389
3390         for(xp = winx; bytelen > 0;) {
3391                 /*
3392                  * Search for the range in the to be printed string of glyphs
3393                  * that are in the main font. Then print that range. If
3394                  * some glyph is found that is not in the font, do the
3395                  * fallback dance.
3396                  */
3397                 u8fs = s;
3398                 u8fblen = 0;
3399                 u8fl = 0;
3400                 oneatatime = font->width != xw.cw;
3401                 for(;;) {
3402                         u8c = s;
3403                         u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3404                         s += u8cblen;
3405                         bytelen -= u8cblen;
3406
3407                         doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3408                         if(doesexist) {
3409                                         u8fl++;
3410                                         u8fblen += u8cblen;
3411                                         if(!oneatatime && bytelen > 0)
3412                                                         continue;
3413                         }
3414
3415                         if(u8fl > 0) {
3416                                 XftDrawStringUtf8(xw.draw, fg,
3417                                                 font->match, xp,
3418                                                 winy + font->ascent,
3419                                                 (FcChar8 *)u8fs,
3420                                                 u8fblen);
3421                                 xp += xw.cw * u8fl;
3422                         }
3423                         break;
3424                 }
3425                 if(doesexist) {
3426                         if(oneatatime)
3427                                 continue;
3428                         break;
3429                 }
3430
3431                 /* Search the font cache. */
3432                 for(i = 0; i < frclen; i++) {
3433                         charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3434                         /* Everything correct. */
3435                         if(charexists && frc[i].flags == frcflags)
3436                                 break;
3437                         /* We got a default font for a not found glyph. */
3438                         if(!charexists && frc[i].flags == frcflags \
3439                                         && frc[i].unicodep == unicodep) {
3440                                 break;
3441                         }
3442                 }
3443
3444                 /* Nothing was found. */
3445                 if(i >= frclen) {
3446                         if(!font->set)
3447                                 xloadfontset(font);
3448                         fcsets[0] = font->set;
3449
3450                         /*
3451                          * Nothing was found in the cache. Now use
3452                          * some dozen of Fontconfig calls to get the
3453                          * font for one single character.
3454                          *
3455                          * Xft and fontconfig are design failures.
3456                          */
3457                         fcpattern = FcPatternDuplicate(font->pattern);
3458                         fccharset = FcCharSetCreate();
3459
3460                         FcCharSetAddChar(fccharset, unicodep);
3461                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
3462                                         fccharset);
3463                         FcPatternAddBool(fcpattern, FC_SCALABLE,
3464                                         FcTrue);
3465
3466                         FcConfigSubstitute(0, fcpattern,
3467                                         FcMatchPattern);
3468                         FcDefaultSubstitute(fcpattern);
3469
3470                         fontpattern = FcFontSetMatch(0, fcsets, 1,
3471                                         fcpattern, &fcres);
3472
3473                         /*
3474                          * Overwrite or create the new cache entry.
3475                          */
3476                         if(frclen >= LEN(frc)) {
3477                                 frclen = LEN(frc) - 1;
3478                                 XftFontClose(xw.dpy, frc[frclen].font);
3479                                 frc[frclen].unicodep = 0;
3480                         }
3481
3482                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
3483                                         fontpattern);
3484                         frc[frclen].flags = frcflags;
3485                         frc[frclen].unicodep = unicodep;
3486
3487                         i = frclen;
3488                         frclen++;
3489
3490                         FcPatternDestroy(fcpattern);
3491                         FcCharSetDestroy(fccharset);
3492                 }
3493
3494                 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3495                                 xp, winy + frc[i].font->ascent,
3496                                 (FcChar8 *)u8c, u8cblen);
3497
3498                 xp += xw.cw * wcwidth(unicodep);
3499         }
3500
3501         /*
3502          * This is how the loop above actually should be. Why does the
3503          * application have to care about font details?
3504          *
3505          * I have to repeat: Xft and Fontconfig are design failures.
3506          */
3507         /*
3508         XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3509                         winy + font->ascent, (FcChar8 *)s, bytelen);
3510         */
3511
3512         if(base.mode & ATTR_UNDERLINE) {
3513                 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3514                                 width, 1);
3515         }
3516
3517         if(base.mode & ATTR_STRUCK) {
3518                 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3519                                 width, 1);
3520         }
3521
3522         /* Reset clip to none. */
3523         XftDrawSetClip(xw.draw, 0);
3524 }
3525
3526 void
3527 xdrawcursor(void) {
3528         static int oldx = 0, oldy = 0;
3529         int sl, width, curx;
3530         Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3531
3532         LIMIT(oldx, 0, term.col-1);
3533         LIMIT(oldy, 0, term.row-1);
3534
3535         curx = term.c.x;
3536
3537         /* adjust position if in dummy */
3538         if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3539                 oldx--;
3540         if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3541                 curx--;
3542
3543         memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3544
3545         /* remove the old cursor */
3546         sl = utf8len(term.line[oldy][oldx].c);
3547         width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3548         xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3549                         oldy, width, sl);
3550
3551         if(IS_SET(MODE_HIDE))
3552                 return;
3553
3554         /* draw the new one */
3555         if(xw.state & WIN_FOCUSED) {
3556                 if(IS_SET(MODE_REVERSE)) {
3557                         g.mode |= ATTR_REVERSE;
3558                         g.fg = defaultcs;
3559                         g.bg = defaultfg;
3560                 }
3561
3562                 sl = utf8len(g.c);
3563                 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3564                         ? 2 : 1;
3565                 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3566         } else {
3567                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3568                                 borderpx + curx * xw.cw,
3569                                 borderpx + term.c.y * xw.ch,
3570                                 xw.cw - 1, 1);
3571                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3572                                 borderpx + curx * xw.cw,
3573                                 borderpx + term.c.y * xw.ch,
3574                                 1, xw.ch - 1);
3575                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3576                                 borderpx + (curx + 1) * xw.cw - 1,
3577                                 borderpx + term.c.y * xw.ch,
3578                                 1, xw.ch - 1);
3579                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3580                                 borderpx + curx * xw.cw,
3581                                 borderpx + (term.c.y + 1) * xw.ch - 1,
3582                                 xw.cw, 1);
3583         }
3584         oldx = curx, oldy = term.c.y;
3585 }
3586
3587
3588 void
3589 xsettitle(char *p) {
3590         XTextProperty prop;
3591
3592         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3593                         &prop);
3594         XSetWMName(xw.dpy, xw.win, &prop);
3595         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3596         XFree(prop.value);
3597 }
3598
3599 void
3600 xresettitle(void) {
3601         xsettitle(opt_title ? opt_title : "st");
3602 }
3603
3604 void
3605 redraw(void) {
3606         tfulldirt();
3607         draw();
3608 }
3609
3610 void
3611 draw(void) {
3612         drawregion(0, 0, term.col, term.row);
3613         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3614                         xw.h, 0, 0);
3615         XSetForeground(xw.dpy, dc.gc,
3616                         dc.col[IS_SET(MODE_REVERSE)?
3617                                 defaultfg : defaultbg].pixel);
3618 }
3619
3620 void
3621 drawregion(int x1, int y1, int x2, int y2) {
3622         int ic, ib, x, y, ox, sl;
3623         Glyph base, new;
3624         char buf[DRAW_BUF_SIZ];
3625         bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3626         long unicodep;
3627
3628         if(!(xw.state & WIN_VISIBLE))
3629                 return;
3630
3631         for(y = y1; y < y2; y++) {
3632                 if(!term.dirty[y])
3633                         continue;
3634
3635                 xtermclear(0, y, term.col, y);
3636                 term.dirty[y] = 0;
3637                 base = term.line[y][0];
3638                 ic = ib = ox = 0;
3639                 for(x = x1; x < x2; x++) {
3640                         new = term.line[y][x];
3641                         if(new.mode == ATTR_WDUMMY)
3642                                 continue;
3643                         if(ena_sel && selected(x, y))
3644                                 new.mode ^= ATTR_REVERSE;
3645                         if(ib > 0 && (ATTRCMP(base, new)
3646                                         || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3647                                 xdraws(buf, base, ox, y, ic, ib);
3648                                 ic = ib = 0;
3649                         }
3650                         if(ib == 0) {
3651                                 ox = x;
3652                                 base = new;
3653                         }
3654
3655                         sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3656                         memcpy(buf+ib, new.c, sl);
3657                         ib += sl;
3658                         ic += (new.mode & ATTR_WIDE)? 2 : 1;
3659                 }
3660                 if(ib > 0)
3661                         xdraws(buf, base, ox, y, ic, ib);
3662         }
3663         xdrawcursor();
3664 }
3665
3666 void
3667 expose(XEvent *ev) {
3668         XExposeEvent *e = &ev->xexpose;
3669
3670         if(xw.state & WIN_REDRAW) {
3671                 if(!e->count)
3672                         xw.state &= ~WIN_REDRAW;
3673         }
3674         redraw();
3675 }
3676
3677 void
3678 visibility(XEvent *ev) {
3679         XVisibilityEvent *e = &ev->xvisibility;
3680
3681         if(e->state == VisibilityFullyObscured) {
3682                 xw.state &= ~WIN_VISIBLE;
3683         } else if(!(xw.state & WIN_VISIBLE)) {
3684                 /* need a full redraw for next Expose, not just a buf copy */
3685                 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3686         }
3687 }
3688
3689 void
3690 unmap(XEvent *ev) {
3691         xw.state &= ~WIN_VISIBLE;
3692 }
3693
3694 void
3695 xsetpointermotion(int set) {
3696         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3697         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3698 }
3699
3700 void
3701 xseturgency(int add) {
3702         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3703
3704         MODBIT(h->flags, add, XUrgencyHint);
3705         XSetWMHints(xw.dpy, xw.win, h);
3706         XFree(h);
3707 }
3708
3709 void
3710 focus(XEvent *ev) {
3711         XFocusChangeEvent *e = &ev->xfocus;
3712
3713         if(e->mode == NotifyGrab)
3714                 return;
3715
3716         if(ev->type == FocusIn) {
3717                 XSetICFocus(xw.xic);
3718                 xw.state |= WIN_FOCUSED;
3719                 xseturgency(0);
3720                 if(IS_SET(MODE_FOCUS))
3721                         ttywrite("\033[I", 3);
3722         } else {
3723                 XUnsetICFocus(xw.xic);
3724                 xw.state &= ~WIN_FOCUSED;
3725                 if(IS_SET(MODE_FOCUS))
3726                         ttywrite("\033[O", 3);
3727         }
3728 }
3729
3730 static inline bool
3731 match(uint mask, uint state) {
3732         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3733 }
3734
3735 void
3736 numlock(const Arg *dummy) {
3737         term.numlock ^= 1;
3738 }
3739
3740 char*
3741 kmap(KeySym k, uint state) {
3742         Key *kp;
3743         int i;
3744
3745         /* Check for mapped keys out of X11 function keys. */
3746         for(i = 0; i < LEN(mappedkeys); i++) {
3747                 if(mappedkeys[i] == k)
3748                         break;
3749         }
3750         if(i == LEN(mappedkeys)) {
3751                 if((k & 0xFFFF) < 0xFD00)
3752                         return NULL;
3753         }
3754
3755         for(kp = key; kp < key + LEN(key); kp++) {
3756                 if(kp->k != k)
3757                         continue;
3758
3759                 if(!match(kp->mask, state))
3760                         continue;
3761
3762                 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3763                         continue;
3764                 if(term.numlock && kp->appkey == 2)
3765                         continue;
3766
3767                 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3768                         continue;
3769
3770                 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3771                         continue;
3772
3773                 return kp->s;
3774         }
3775
3776         return NULL;
3777 }
3778
3779 void
3780 kpress(XEvent *ev) {
3781         XKeyEvent *e = &ev->xkey;
3782         KeySym ksym;
3783         char buf[32], *customkey;
3784         int len;
3785         long c;
3786         Status status;
3787         Shortcut *bp;
3788
3789         if(IS_SET(MODE_KBDLOCK))
3790                 return;
3791
3792         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3793         /* 1. shortcuts */
3794         for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3795                 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3796                         bp->func(&(bp->arg));
3797                         return;
3798                 }
3799         }
3800
3801         /* 2. custom keys from config.h */
3802         if((customkey = kmap(ksym, e->state))) {
3803                 ttysend(customkey, strlen(customkey));
3804                 return;
3805         }
3806
3807         /* 3. composed string from input method */
3808         if(len == 0)
3809                 return;
3810         if(len == 1 && e->state & Mod1Mask) {
3811                 if(IS_SET(MODE_8BIT)) {
3812                         if(*buf < 0177) {
3813                                 c = *buf | 0x80;
3814                                 len = utf8encode(c, buf, UTF_SIZ);
3815                         }
3816                 } else {
3817                         buf[1] = buf[0];
3818                         buf[0] = '\033';
3819                         len = 2;
3820                 }
3821         }
3822         ttysend(buf, len);
3823 }
3824
3825
3826 void
3827 cmessage(XEvent *e) {
3828         /*
3829          * See xembed specs
3830          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3831          */
3832         if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3833                 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3834                         xw.state |= WIN_FOCUSED;
3835                         xseturgency(0);
3836                 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3837                         xw.state &= ~WIN_FOCUSED;
3838                 }
3839         } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3840                 /* Send SIGHUP to shell */
3841                 kill(pid, SIGHUP);
3842                 exit(EXIT_SUCCESS);
3843         }
3844 }
3845
3846 void
3847 cresize(int width, int height) {
3848         int col, row;
3849
3850         if(width != 0)
3851                 xw.w = width;
3852         if(height != 0)
3853                 xw.h = height;
3854
3855         col = (xw.w - 2 * borderpx) / xw.cw;
3856         row = (xw.h - 2 * borderpx) / xw.ch;
3857
3858         tresize(col, row);
3859         xresize(col, row);
3860         ttyresize();
3861 }
3862
3863 void
3864 resize(XEvent *e) {
3865         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3866                 return;
3867
3868         cresize(e->xconfigure.width, e->xconfigure.height);
3869 }
3870
3871 void
3872 run(void) {
3873         XEvent ev;
3874         int w = xw.w, h = xw.h;
3875         fd_set rfd;
3876         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3877         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3878         long deltatime;
3879
3880         /* Waiting for window mapping */
3881         while(1) {
3882                 XNextEvent(xw.dpy, &ev);
3883                 if(XFilterEvent(&ev, None))
3884                         continue;
3885                 if(ev.type == ConfigureNotify) {
3886                         w = ev.xconfigure.width;
3887                         h = ev.xconfigure.height;
3888                 } else if(ev.type == MapNotify) {
3889                         break;
3890                 }
3891         }
3892
3893         ttynew();
3894         cresize(w, h);
3895
3896         clock_gettime(CLOCK_MONOTONIC, &last);
3897         lastblink = last;
3898
3899         for(xev = actionfps;;) {
3900                 FD_ZERO(&rfd);
3901                 FD_SET(cmdfd, &rfd);
3902                 FD_SET(xfd, &rfd);
3903
3904                 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3905                         if(errno == EINTR)
3906                                 continue;
3907                         die("select failed: %s\n", strerror(errno));
3908                 }
3909                 if(FD_ISSET(cmdfd, &rfd)) {
3910                         ttyread();
3911                         if(blinktimeout) {
3912                                 blinkset = tattrset(ATTR_BLINK);
3913                                 if(!blinkset)
3914                                         MODBIT(term.mode, 0, MODE_BLINK);
3915                         }
3916                 }
3917
3918                 if(FD_ISSET(xfd, &rfd))
3919                         xev = actionfps;
3920
3921                 clock_gettime(CLOCK_MONOTONIC, &now);
3922                 drawtimeout.tv_sec = 0;
3923                 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3924                 tv = &drawtimeout;
3925
3926                 dodraw = 0;
3927                 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3928                         tsetdirtattr(ATTR_BLINK);
3929                         term.mode ^= MODE_BLINK;
3930                         lastblink = now;
3931                         dodraw = 1;
3932                 }
3933                 deltatime = TIMEDIFF(now, last);
3934                 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3935                                 || deltatime < 0) {
3936                         dodraw = 1;
3937                         last = now;
3938                 }
3939
3940                 if(dodraw) {
3941                         while(XPending(xw.dpy)) {
3942                                 XNextEvent(xw.dpy, &ev);
3943                                 if(XFilterEvent(&ev, None))
3944                                         continue;
3945                                 if(handler[ev.type])
3946                                         (handler[ev.type])(&ev);
3947                         }
3948
3949                         draw();
3950                         XFlush(xw.dpy);
3951
3952                         if(xev && !FD_ISSET(xfd, &rfd))
3953                                 xev--;
3954                         if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3955                                 if(blinkset) {
3956                                         if(TIMEDIFF(now, lastblink) \
3957                                                         > blinktimeout) {
3958                                                 drawtimeout.tv_nsec = 1000;
3959                                         } else {
3960                                                 drawtimeout.tv_nsec = (1E6 * \
3961                                                         (blinktimeout - \
3962                                                         TIMEDIFF(now,
3963                                                                 lastblink)));
3964                                         }
3965                                         drawtimeout.tv_sec = \
3966                                             drawtimeout.tv_nsec / 1E9;
3967                                         drawtimeout.tv_nsec %= (long)1E9;
3968                                 } else {
3969                                         tv = NULL;
3970                                 }
3971                         }
3972                 }
3973         }
3974 }
3975
3976 void
3977 usage(void) {
3978         die("%s " VERSION " (c) 2010-2015 st engineers\n" \
3979         "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3980         "          [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3981 }
3982
3983 int
3984 main(int argc, char *argv[]) {
3985         char *titles;
3986         uint cols = 80, rows = 24;
3987
3988         xw.l = xw.t = 0;
3989         xw.isfixed = False;
3990
3991         ARGBEGIN {
3992         case 'a':
3993                 allowaltscreen = false;
3994                 break;
3995         case 'c':
3996                 opt_class = EARGF(usage());
3997                 break;
3998         case 'e':
3999                 /* eat all remaining arguments */
4000                 if(argc > 1) {
4001                         opt_cmd = &argv[1];
4002                         if(argv[1] != NULL && opt_title == NULL) {
4003                                 titles = xstrdup(argv[1]);
4004                                 opt_title = basename(titles);
4005                         }
4006                 }
4007                 goto run;
4008         case 'f':
4009                 opt_font = EARGF(usage());
4010                 break;
4011         case 'g':
4012                 xw.gm = XParseGeometry(EARGF(usage()),
4013                                 &xw.l, &xw.t, &cols, &rows);
4014                 break;
4015         case 'i':
4016                 xw.isfixed = True;
4017                 break;
4018         case 'o':
4019                 opt_io = EARGF(usage());
4020                 break;
4021         case 't':
4022                 opt_title = EARGF(usage());
4023                 break;
4024         case 'w':
4025                 opt_embed = EARGF(usage());
4026                 break;
4027         case 'v':
4028         default:
4029                 usage();
4030         } ARGEND;
4031
4032 run:
4033         setlocale(LC_CTYPE, "");
4034         XSetLocaleModifiers("");
4035         tnew(cols? cols : 1, rows? rows : 1);
4036         xinit();
4037         selinit();
4038         run();
4039
4040         return 0;
4041 }
4042