st.c

   1 /* See LICENSE for license details. */
   2 #include <ctype.h>
   3 #include <errno.h>
   4 #include <fcntl.h>
   5 #include <limits.h>
   6 #include <locale.h>
   7 #include <pwd.h>
   8 #include <stdarg.h>
   9 #include <stdbool.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <signal.h>
  14 #include <stdint.h>
  15 #include <sys/ioctl.h>
  16 #include <sys/select.h>
  17 #include <sys/stat.h>
  18 #include <sys/time.h>
  19 #include <sys/types.h>
  20 #include <sys/wait.h>
  21 #include <time.h>
  22 #include <unistd.h>
  23 #include <libgen.h>
  24 #include <X11/Xatom.h>
  25 #include <X11/Xlib.h>
  26 #include <X11/Xutil.h>
  27 #include <X11/cursorfont.h>
  28 #include <X11/keysym.h>
  29 #include <X11/Xft/Xft.h>
  30 #include <X11/XKBlib.h>
  31 #include <fontconfig/fontconfig.h>
  32 #include <wchar.h>
  33
  34 #include "arg.h"
  35
  36 char *argv0;
  37
  38 #define Glyph Glyph_
  39 #define Font Font_
  40
  41 #if   defined(__linux)
  42  #include <pty.h>
  43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  44  #include <util.h>
  45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
  46  #include <libutil.h>
  47 #endif
  48
  49
  50 /* XEMBED messages */
  51 #define XEMBED_FOCUS_IN  4
  52 #define XEMBED_FOCUS_OUT 5
  53
  54 /* Arbitrary sizes */
  55 #define UTF_INVALID   0xFFFD
  56 #define UTF_SIZ       4
  57 #define ESC_BUF_SIZ   (128*UTF_SIZ)
  58 #define ESC_ARG_SIZ   16
  59 #define STR_BUF_SIZ   ESC_BUF_SIZ
  60 #define STR_ARG_SIZ   ESC_ARG_SIZ
  61 #define DRAW_BUF_SIZ  20*1024
  62 #define XK_ANY_MOD    UINT_MAX
  63 #define XK_NO_MOD     0
  64 #define XK_SWITCH_MOD (1<<13)
  65
  66 /* macros */
  67 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
  68 #define MAX(a, b)  ((a) < (b) ? (b) : (a))
  69 #define LEN(a)     (sizeof(a) / sizeof(a)[0])
  70 #define DEFAULT(a, b)     (a) = (a) ? (a) : (b)
  71 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
  72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
  73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
  74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
  75 #define ISDELIM(u) (BETWEEN(u, 0, 127) && strchr(worddelimiters, u) != NULL)
  76 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
  79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
  80 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
  81
  82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
  83 #define IS_TRUECOL(x)    (1 << 24 & (x))
  84 #define TRUERED(x)       (((x) & 0xff0000) >> 8)
  85 #define TRUEGREEN(x)     (((x) & 0xff00))
  86 #define TRUEBLUE(x)      (((x) & 0xff) << 8)
  87
  88
  89 enum glyph_attribute {
  90         ATTR_NULL      = 0,
  91         ATTR_BOLD      = 1 << 0,
  92         ATTR_FAINT     = 1 << 1,
  93         ATTR_ITALIC    = 1 << 2,
  94         ATTR_UNDERLINE = 1 << 3,
  95         ATTR_BLINK     = 1 << 4,
  96         ATTR_REVERSE   = 1 << 5,
  97         ATTR_INVISIBLE = 1 << 6,
  98         ATTR_STRUCK    = 1 << 7,
  99         ATTR_WRAP      = 1 << 8,
 100         ATTR_WIDE      = 1 << 9,
 101         ATTR_WDUMMY    = 1 << 10,
 102 };
 103
 104 enum cursor_movement {
 105         CURSOR_SAVE,
 106         CURSOR_LOAD
 107 };
 108
 109 enum cursor_state {
 110         CURSOR_DEFAULT  = 0,
 111         CURSOR_WRAPNEXT = 1,
 112         CURSOR_ORIGIN   = 2
 113 };
 114
 115 enum term_mode {
 116         MODE_WRAP        = 1 << 0,
 117         MODE_INSERT      = 1 << 1,
 118         MODE_APPKEYPAD   = 1 << 2,
 119         MODE_ALTSCREEN   = 1 << 3,
 120         MODE_CRLF        = 1 << 4,
 121         MODE_MOUSEBTN    = 1 << 5,
 122         MODE_MOUSEMOTION = 1 << 6,
 123         MODE_REVERSE     = 1 << 7,
 124         MODE_KBDLOCK     = 1 << 8,
 125         MODE_HIDE        = 1 << 9,
 126         MODE_ECHO        = 1 << 10,
 127         MODE_APPCURSOR   = 1 << 11,
 128         MODE_MOUSESGR    = 1 << 12,
 129         MODE_8BIT        = 1 << 13,
 130         MODE_BLINK       = 1 << 14,
 131         MODE_FBLINK      = 1 << 15,
 132         MODE_FOCUS       = 1 << 16,
 133         MODE_MOUSEX10    = 1 << 17,
 134         MODE_MOUSEMANY   = 1 << 18,
 135         MODE_BRCKTPASTE  = 1 << 19,
 136         MODE_PRINT       = 1 << 20,
 137         MODE_MOUSE       = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
 138                           |MODE_MOUSEMANY,
 139 };
 140
 141 enum charset {
 142         CS_GRAPHIC0,
 143         CS_GRAPHIC1,
 144         CS_UK,
 145         CS_USA,
 146         CS_MULTI,
 147         CS_GER,
 148         CS_FIN
 149 };
 150
 151 enum escape_state {
 152         ESC_START      = 1,
 153         ESC_CSI        = 2,
 154         ESC_STR        = 4,  /* DCS, OSC, PM, APC */
 155         ESC_ALTCHARSET = 8,
 156         ESC_STR_END    = 16, /* a final string was encountered */
 157         ESC_TEST       = 32, /* Enter in test mode */
 158 };
 159
 160 enum window_state {
 161         WIN_VISIBLE = 1,
 162         WIN_FOCUSED = 2
 163 };
 164
 165 enum selection_type {
 166         SEL_REGULAR = 1,
 167         SEL_RECTANGULAR = 2
 168 };
 169
 170 enum selection_snap {
 171         SNAP_WORD = 1,
 172         SNAP_LINE = 2
 173 };
 174
 175 typedef unsigned char uchar;
 176 typedef unsigned int uint;
 177 typedef unsigned long ulong;
 178 typedef unsigned short ushort;
 179
 180 typedef XftDraw *Draw;
 181 typedef XftColor Color;
 182
 183 typedef struct {
 184         long u;           /* character code */
 185         ushort mode;      /* attribute flags */
 186         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> [<mode>]] */
 201 typedef struct {
 202         char buf[ESC_BUF_SIZ]; /* raw string */
 203         int len;               /* raw string length */
 204         char priv;
 205         int arg[ESC_ARG_SIZ];
 206         int narg;              /* nb of args */
 207         char mode[2];
 208 } CSIEscape;
 209
 210 /* STR Escape sequence structs */
 211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
 212 typedef struct {
 213         char type;             /* ESC type ... */
 214         char buf[STR_BUF_SIZ]; /* raw string */
 215         int len;               /* raw string length */
 216         char *args[STR_ARG_SIZ];
 217         int narg;              /* nb of args */
 218 } STREscape;
 219
 220 /* Internal representation of the screen */
 221 typedef struct {
 222         int row;      /* nb row */
 223         int col;      /* nb col */
 224         Line *line;   /* screen */
 225         Line *alt;    /* alternate screen */
 226         bool *dirty;  /* dirtyness of lines */
 227         TCursor c;    /* cursor */
 228         int top;      /* top    scroll limit */
 229         int bot;      /* bottom scroll limit */
 230         int mode;     /* terminal mode flags */
 231         int esc;      /* escape state flags */
 232         char trantbl[4]; /* charset table translation */
 233         int charset;  /* current charset */
 234         int icharset; /* selected charset for sequence */
 235         bool numlock; /* lock numbers in keyboard */
 236         bool *tabs;
 237 } Term;
 238
 239 /* Purely graphic info */
 240 typedef struct {
 241         Display *dpy;
 242         Colormap cmap;
 243         Window win;
 244         Drawable buf;
 245         Atom xembed, wmdeletewin, netwmname, netwmpid;
 246         XIM xim;
 247         XIC xic;
 248         Draw draw;
 249         Visual *vis;
 250         XSetWindowAttributes attrs;
 251         int scr;
 252         bool isfixed; /* is fixed geometry? */
 253         int l, t; /* left and top offset */
 254         int gm; /* geometry mask */
 255         int tw, th; /* tty width and height */
 256         int w, h; /* window width and height */
 257         int ch; /* char height */
 258         int cw; /* char width  */
 259         char state; /* focus, redraw, visible */
 260         int cursor; /* cursor style */
 261 } XWindow;
 262
 263 typedef struct {
 264         uint b;
 265         uint mask;
 266         char *s;
 267 } Mousekey;
 268
 269 typedef struct {
 270         KeySym k;
 271         uint mask;
 272         char *s;
 273         /* three valued logic variables: 0 indifferent, 1 on, -1 off */
 274         signed char appkey;    /* application keypad */
 275         signed char appcursor; /* application cursor */
 276         signed char crlf;      /* crlf mode          */
 277 } Key;
 278
 279 typedef struct {
 280         int mode;
 281         int type;
 282         int snap;
 283         /*
 284          * Selection variables:
 285          * nb – normalized coordinates of the beginning of the selection
 286          * ne – normalized coordinates of the end of the selection
 287          * ob – original coordinates of the beginning of the selection
 288          * oe – original coordinates of the end of the selection
 289          */
 290         struct {
 291                 int x, y;
 292         } nb, ne, ob, oe;
 293
 294         char *primary, *clipboard;
 295         Atom xtarget;
 296         bool alt;
 297         struct timespec tclick1;
 298         struct timespec tclick2;
 299 } Selection;
 300
 301 typedef union {
 302         int i;
 303         uint ui;
 304         float f;
 305         const void *v;
 306 } Arg;
 307
 308 typedef struct {
 309         uint mod;
 310         KeySym keysym;
 311         void (*func)(const Arg *);
 312         const Arg arg;
 313 } Shortcut;
 314
 315 /* function definitions used in config.h */
 316 static void clipcopy(const Arg *);
 317 static void clippaste(const Arg *);
 318 static void numlock(const Arg *);
 319 static void selpaste(const Arg *);
 320 static void xzoom(const Arg *);
 321 static void xzoomabs(const Arg *);
 322 static void xzoomreset(const Arg *);
 323 static void printsel(const Arg *);
 324 static void printscreen(const Arg *) ;
 325 static void toggleprinter(const Arg *);
 326
 327 /* Config.h for applying patches and the configuration. */
 328 #include "config.h"
 329
 330 /* Font structure */
 331 typedef struct {
 332         int height;
 333         int width;
 334         int ascent;
 335         int descent;
 336         short lbearing;
 337         short rbearing;
 338         XftFont *match;
 339         FcFontSet *set;
 340         FcPattern *pattern;
 341 } Font;
 342
 343 /* Drawing Context */
 344 typedef struct {
 345         Color col[MAX(LEN(colorname), 256)];
 346         Font font, bfont, ifont, ibfont;
 347         GC gc;
 348 } DC;
 349
 350 static void die(const char *, ...);
 351 static void draw(void);
 352 static void redraw(void);
 353 static void drawregion(int, int, int, int);
 354 static void execsh(void);
 355 static void stty(void);
 356 static void sigchld(int);
 357 static void run(void);
 358
 359 static void csidump(void);
 360 static void csihandle(void);
 361 static void csiparse(void);
 362 static void csireset(void);
 363 static int eschandle(uchar);
 364 static void strdump(void);
 365 static void strhandle(void);
 366 static void strparse(void);
 367 static void strreset(void);
 368
 369 static int tattrset(int);
 370 static void tprinter(char *, size_t);
 371 static void tdumpsel(void);
 372 static void tdumpline(int);
 373 static void tdump(void);
 374 static void tclearregion(int, int, int, int);
 375 static void tcursor(int);
 376 static void tdeletechar(int);
 377 static void tdeleteline(int);
 378 static void tinsertblank(int);
 379 static void tinsertblankline(int);
 380 static int tlinelen(int);
 381 static void tmoveto(int, int);
 382 static void tmoveato(int, int);
 383 static void tnew(int, int);
 384 static void tnewline(int);
 385 static void tputtab(int);
 386 static void tputc(char *, int);
 387 static void treset(void);
 388 static void tresize(int, int);
 389 static void tscrollup(int, int);
 390 static void tscrolldown(int, int);
 391 static void tsetattr(int *, int);
 392 static void tsetchar(char *, Glyph *, int, int);
 393 static void tsetscroll(int, int);
 394 static void tswapscreen(void);
 395 static void tsetdirt(int, int);
 396 static void tsetdirtattr(int);
 397 static void tsetmode(bool, bool, int *, int);
 398 static void tfulldirt(void);
 399 static void techo(char *, int);
 400 static void tcontrolcode(uchar );
 401 static void tdectest(char );
 402 static int32_t tdefcolor(int *, int *, int);
 403 static void tdeftran(char);
 404 static inline bool match(uint, uint);
 405 static void ttynew(void);
 406 static void ttyread(void);
 407 static void ttyresize(void);
 408 static void ttysend(char *, size_t);
 409 static void ttywrite(const char *, size_t);
 410 static void tstrsequence(uchar);
 411
 412 static inline ushort sixd_to_16bit(int);
 413 static void xdraws(char *, Glyph, int, int, int, int);
 414 static void xdrawglyph(Glyph, int, int);
 415 static void xhints(void);
 416 static void xclear(int, int, int, int);
 417 static void xdrawcursor(void);
 418 static void xinit(void);
 419 static void xloadcols(void);
 420 static int xsetcolorname(int, const char *);
 421 static int xgeommasktogravity(int);
 422 static int xloadfont(Font *, FcPattern *);
 423 static void xloadfonts(char *, double);
 424 static void xsettitle(char *);
 425 static void xresettitle(void);
 426 static void xsetpointermotion(int);
 427 static void xseturgency(int);
 428 static void xsetsel(char *, Time);
 429 static void xtermclear(int, int, int, int);
 430 static void xunloadfont(Font *);
 431 static void xunloadfonts(void);
 432 static void xresize(int, int);
 433
 434 static void expose(XEvent *);
 435 static void visibility(XEvent *);
 436 static void unmap(XEvent *);
 437 static char *kmap(KeySym, uint);
 438 static void kpress(XEvent *);
 439 static void cmessage(XEvent *);
 440 static void cresize(int, int);
 441 static void resize(XEvent *);
 442 static void focus(XEvent *);
 443 static void brelease(XEvent *);
 444 static void bpress(XEvent *);
 445 static void bmotion(XEvent *);
 446 static void selnotify(XEvent *);
 447 static void selclear(XEvent *);
 448 static void selrequest(XEvent *);
 449
 450 static void selinit(void);
 451 static void selnormalize(void);
 452 static inline bool selected(int, int);
 453 static char *getsel(void);
 454 static void selcopy(Time);
 455 static void selscroll(int, int);
 456 static void selsnap(int, int *, int *, int);
 457 static int x2col(int);
 458 static int y2row(int);
 459 static void getbuttoninfo(XEvent *);
 460 static void mousereport(XEvent *);
 461
 462 static size_t utf8decode(char *, long *, size_t);
 463 static long utf8decodebyte(char, size_t *);
 464 static size_t utf8encode(long, char *);
 465 static char utf8encodebyte(long, size_t);
 466 static size_t utf8validate(long *, size_t);
 467
 468 static ssize_t xwrite(int, const char *, size_t);
 469 static void *xmalloc(size_t);
 470 static void *xrealloc(void *, size_t);
 471 static char *xstrdup(char *);
 472
 473 static void usage(void);
 474
 475 static void (*handler[LASTEvent])(XEvent *) = {
 476         [KeyPress] = kpress,
 477         [ClientMessage] = cmessage,
 478         [ConfigureNotify] = resize,
 479         [VisibilityNotify] = visibility,
 480         [UnmapNotify] = unmap,
 481         [Expose] = expose,
 482         [FocusIn] = focus,
 483         [FocusOut] = focus,
 484         [MotionNotify] = bmotion,
 485         [ButtonPress] = bpress,
 486         [ButtonRelease] = brelease,
 487 /*
 488  * Uncomment if you want the selection to disappear when you select something
 489  * different in another window.
 490  */
 491 /*      [SelectionClear] = selclear, */
 492         [SelectionNotify] = selnotify,
 493         [SelectionRequest] = selrequest,
 494 };
 495
 496 /* Globals */
 497 static DC dc;
 498 static XWindow xw;
 499 static Term term;
 500 static CSIEscape csiescseq;
 501 static STREscape strescseq;
 502 static int cmdfd;
 503 static pid_t pid;
 504 static Selection sel;
 505 static int iofd = STDOUT_FILENO;
 506 static char **opt_cmd = NULL;
 507 static char *opt_io = NULL;
 508 static char *opt_title = NULL;
 509 static char *opt_embed = NULL;
 510 static char *opt_class = NULL;
 511 static char *opt_font = NULL;
 512 static char *opt_line = NULL;
 513 static int oldbutton = 3; /* button event on startup: 3 = release */
 514
 515 static char *usedfont = NULL;
 516 static double usedfontsize = 0;
 517 static double defaultfontsize = 0;
 518
 519 static uchar utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
 520 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
 521 static long utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
 522 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
 523
 524 /* Font Ring Cache */
 525 enum {
 526         FRC_NORMAL,
 527         FRC_ITALIC,
 528         FRC_BOLD,
 529         FRC_ITALICBOLD
 530 };
 531
 532 typedef struct {
 533         XftFont *font;
 534         int flags;
 535         long unicodep;
 536 } Fontcache;
 537
 538 /* Fontcache is an array now. A new font will be appended to the array. */
 539 static Fontcache frc[16];
 540 static int frclen = 0;
 541
 542 ssize_t
 543 xwrite(int fd, const char *s, size_t len) {
 544         size_t aux = len;
 545
 546         while(len > 0) {
 547                 ssize_t r = write(fd, s, len);
 548                 if(r < 0)
 549                         return r;
 550                 len -= r;
 551                 s += r;
 552         }
 553         return aux;
 554 }
 555
 556 void *
 557 xmalloc(size_t len) {
 558         void *p = malloc(len);
 559
 560         if(!p)
 561                 die("Out of memory\n");
 562
 563         return p;
 564 }
 565
 566 void *
 567 xrealloc(void *p, size_t len) {
 568         if((p = realloc(p, len)) == NULL)
 569                 die("Out of memory\n");
 570
 571         return p;
 572 }
 573
 574 char *
 575 xstrdup(char *s) {
 576         if((s = strdup(s)) == NULL)
 577                 die("Out of memory\n");
 578
 579         return s;
 580 }
 581
 582 size_t
 583 utf8decode(char *c, long *u, size_t clen) {
 584         size_t i, j, len, type;
 585         long udecoded;
 586
 587         *u = UTF_INVALID;
 588         if(!clen)
 589                 return 0;
 590         udecoded = utf8decodebyte(c[0], &len);
 591         if(!BETWEEN(len, 1, UTF_SIZ))
 592                 return 1;
 593         for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
 594                 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
 595                 if(type != 0)
 596                         return j;
 597         }
 598         if(j < len)
 599                 return 0;
 600         *u = udecoded;
 601         utf8validate(u, len);
 602         return len;
 603 }
 604
 605 long
 606 utf8decodebyte(char c, size_t *i) {
 607         for(*i = 0; *i < LEN(utfmask); ++(*i))
 608                 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
 609                         return (uchar)c & ~utfmask[*i];
 610         return 0;
 611 }
 612
 613 size_t
 614 utf8encode(long u, char *c) {
 615         size_t len, i;
 616
 617         len = utf8validate(&u, 0);
 618         if(len > UTF_SIZ)
 619                 return 0;
 620         for(i = len - 1; i != 0; --i) {
 621                 c[i] = utf8encodebyte(u, 0);
 622                 u >>= 6;
 623         }
 624         c[0] = utf8encodebyte(u, len);
 625         return len;
 626 }
 627
 628 char
 629 utf8encodebyte(long u, size_t i) {
 630         return utfbyte[i] | (u & ~utfmask[i]);
 631 }
 632
 633 size_t
 634 utf8validate(long *u, size_t i) {
 635         if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
 636                 *u = UTF_INVALID;
 637         for(i = 1; *u > utfmax[i]; ++i)
 638                 ;
 639         return i;
 640 }
 641
 642 void
 643 selinit(void) {
 644         memset(&sel.tclick1, 0, sizeof(sel.tclick1));
 645         memset(&sel.tclick2, 0, sizeof(sel.tclick2));
 646         sel.mode = 0;
 647         sel.ob.x = -1;
 648         sel.primary = NULL;
 649         sel.clipboard = NULL;
 650         sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
 651         if(sel.xtarget == None)
 652                 sel.xtarget = XA_STRING;
 653 }
 654
 655 int
 656 x2col(int x) {
 657         x -= borderpx;
 658         x /= xw.cw;
 659
 660         return LIMIT(x, 0, term.col-1);
 661 }
 662
 663 int
 664 y2row(int y) {
 665         y -= borderpx;
 666         y /= xw.ch;
 667
 668         return LIMIT(y, 0, term.row-1);
 669 }
 670
 671 int
 672 tlinelen(int y) {
 673         int i = term.col;
 674
 675         if(term.line[y][i - 1].mode & ATTR_WRAP)
 676                 return i;
 677
 678         while(i > 0 && term.line[y][i - 1].u == ' ')
 679                 --i;
 680
 681         return i;
 682 }
 683
 684 void
 685 selnormalize(void) {
 686         int i;
 687
 688         if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
 689                 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
 690                 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
 691         } else {
 692                 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
 693                 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
 694         }
 695         sel.nb.y = MIN(sel.ob.y, sel.oe.y);
 696         sel.ne.y = MAX(sel.ob.y, sel.oe.y);
 697
 698         selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
 699         selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
 700
 701         /* expand selection over line breaks */
 702         if (sel.type == SEL_RECTANGULAR)
 703                 return;
 704         i = tlinelen(sel.nb.y);
 705         if (i < sel.nb.x)
 706                 sel.nb.x = i;
 707         if (tlinelen(sel.ne.y) <= sel.ne.x)
 708                 sel.ne.x = term.col - 1;
 709 }
 710
 711 bool
 712 selected(int x, int y) {
 713         if(sel.type == SEL_RECTANGULAR)
 714                 return BETWEEN(y, sel.nb.y, sel.ne.y)
 715                     && BETWEEN(x, sel.nb.x, sel.ne.x);
 716
 717         return BETWEEN(y, sel.nb.y, sel.ne.y)
 718             && (y != sel.nb.y || x >= sel.nb.x)
 719             && (y != sel.ne.y || x <= sel.ne.x);
 720 }
 721
 722 void
 723 selsnap(int mode, int *x, int *y, int direction) {
 724         int newx, newy, xt, yt;
 725         bool delim, prevdelim;
 726         Glyph *gp, *prevgp;
 727
 728         switch(mode) {
 729         case SNAP_WORD:
 730                 /*
 731                  * Snap around if the word wraps around at the end or
 732                  * beginning of a line.
 733                  */
 734                 prevgp = &term.line[*y][*x];
 735                 prevdelim = ISDELIM(prevgp->u);
 736                 for(;;) {
 737                         newx = *x + direction;
 738                         newy = *y;
 739                         if(!BETWEEN(newx, 0, term.col - 1)) {
 740                                 newy += direction;
 741                                 newx = (newx + term.col) % term.col;
 742                                 if (!BETWEEN(newy, 0, term.row - 1))
 743                                         break;
 744
 745                                 if(direction > 0)
 746                                         yt = *y, xt = *x;
 747                                 else
 748                                         yt = newy, xt = newx;
 749                                 if(!(term.line[yt][xt].mode & ATTR_WRAP))
 750                                         break;
 751                         }
 752
 753                         if (newx >= tlinelen(newy))
 754                                 break;
 755
 756                         gp = &term.line[newy][newx];
 757                         delim = ISDELIM(gp->u);
 758                         if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
 759                                         || (delim && gp->u != prevgp->u)))
 760                                 break;
 761
 762                         *x = newx;
 763                         *y = newy;
 764                         prevgp = gp;
 765                         prevdelim = delim;
 766                 }
 767                 break;
 768         case SNAP_LINE:
 769                 /*
 770                  * Snap around if the the previous line or the current one
 771                  * has set ATTR_WRAP at its end. Then the whole next or
 772                  * previous line will be selected.
 773                  */
 774                 *x = (direction < 0) ? 0 : term.col - 1;
 775                 if(direction < 0 && *y > 0) {
 776                         for(; *y > 0; *y += direction) {
 777                                 if(!(term.line[*y-1][term.col-1].mode
 778                                                 & ATTR_WRAP)) {
 779                                         break;
 780                                 }
 781                         }
 782                 } else if(direction > 0 && *y < term.row-1) {
 783                         for(; *y < term.row; *y += direction) {
 784                                 if(!(term.line[*y][term.col-1].mode
 785                                                 & ATTR_WRAP)) {
 786                                         break;
 787                                 }
 788                         }
 789                 }
 790                 break;
 791         }
 792 }
 793
 794 void
 795 getbuttoninfo(XEvent *e) {
 796         int type;
 797         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 798
 799         sel.alt = IS_SET(MODE_ALTSCREEN);
 800
 801         sel.oe.x = x2col(e->xbutton.x);
 802         sel.oe.y = y2row(e->xbutton.y);
 803         selnormalize();
 804
 805         sel.type = SEL_REGULAR;
 806         for(type = 1; type < LEN(selmasks); ++type) {
 807                 if(match(selmasks[type], state)) {
 808                         sel.type = type;
 809                         break;
 810                 }
 811         }
 812 }
 813
 814 void
 815 mousereport(XEvent *e) {
 816         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 817             button = e->xbutton.button, state = e->xbutton.state,
 818             len;
 819         char buf[40];
 820         static int ox, oy;
 821
 822         /* from urxvt */
 823         if(e->xbutton.type == MotionNotify) {
 824                 if(x == ox && y == oy)
 825                         return;
 826                 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 827                         return;
 828                 /* MOUSE_MOTION: no reporting if no button is pressed */
 829                 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 830                         return;
 831
 832                 button = oldbutton + 32;
 833                 ox = x;
 834                 oy = y;
 835         } else {
 836                 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 837                         button = 3;
 838                 } else {
 839                         button -= Button1;
 840                         if(button >= 3)
 841                                 button += 64 - 3;
 842                 }
 843                 if(e->xbutton.type == ButtonPress) {
 844                         oldbutton = button;
 845                         ox = x;
 846                         oy = y;
 847                 } else if(e->xbutton.type == ButtonRelease) {
 848                         oldbutton = 3;
 849                         /* MODE_MOUSEX10: no button release reporting */
 850                         if(IS_SET(MODE_MOUSEX10))
 851                                 return;
 852                         if (button == 64 || button == 65)
 853                                 return;
 854                 }
 855         }
 856
 857         if(!IS_SET(MODE_MOUSEX10)) {
 858                 button += (state & ShiftMask   ? 4  : 0)
 859                         + (state & Mod4Mask    ? 8  : 0)
 860                         + (state & ControlMask ? 16 : 0);
 861         }
 862
 863         len = 0;
 864         if(IS_SET(MODE_MOUSESGR)) {
 865                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 866                                 button, x+1, y+1,
 867                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 868         } else if(x < 223 && y < 223) {
 869                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 870                                 32+button, 32+x+1, 32+y+1);
 871         } else {
 872                 return;
 873         }
 874
 875         ttywrite(buf, len);
 876 }
 877
 878 void
 879 bpress(XEvent *e) {
 880         struct timespec now;
 881         Mousekey *mk;
 882
 883         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 884                 mousereport(e);
 885                 return;
 886         }
 887
 888         for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
 889                 if(e->xbutton.button == mk->b
 890                                 && match(mk->mask, e->xbutton.state)) {
 891                         ttysend(mk->s, strlen(mk->s));
 892                         return;
 893                 }
 894         }
 895
 896         if(e->xbutton.button == Button1) {
 897                 clock_gettime(CLOCK_MONOTONIC, &now);
 898
 899                 /* Clear previous selection, logically and visually. */
 900                 selclear(NULL);
 901                 sel.mode = 1;
 902                 sel.type = SEL_REGULAR;
 903                 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
 904                 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
 905
 906                 /*
 907                  * If the user clicks below predefined timeouts specific
 908                  * snapping behaviour is exposed.
 909                  */
 910                 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
 911                         sel.snap = SNAP_LINE;
 912                 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
 913                         sel.snap = SNAP_WORD;
 914                 } else {
 915                         sel.snap = 0;
 916                 }
 917                 selnormalize();
 918
 919                 /*
 920                  * Draw selection, unless it's regular and we don't want to
 921                  * make clicks visible
 922                  */
 923                 if(sel.snap != 0) {
 924                         sel.mode++;
 925                         tsetdirt(sel.nb.y, sel.ne.y);
 926                 }
 927                 sel.tclick2 = sel.tclick1;
 928                 sel.tclick1 = now;
 929         }
 930 }
 931
 932 char *
 933 getsel(void) {
 934         char *str, *ptr;
 935         int y, bufsize, lastx, linelen;
 936         Glyph *gp, *last;
 937
 938         if(sel.ob.x == -1)
 939                 return NULL;
 940
 941         bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
 942         ptr = str = xmalloc(bufsize);
 943
 944         /* append every set & selected glyph to the selection */
 945         for(y = sel.nb.y; y <= sel.ne.y; y++) {
 946                 linelen = tlinelen(y);
 947
 948                 if(sel.type == SEL_RECTANGULAR) {
 949                         gp = &term.line[y][sel.nb.x];
 950                         lastx = sel.ne.x;
 951                 } else {
 952                         gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
 953                         lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
 954                 }
 955                 last = &term.line[y][MIN(lastx, linelen-1)];
 956                 while(last >= gp && last->u == ' ')
 957                         --last;
 958
 959                 for( ; gp <= last; ++gp) {
 960                         if(gp->mode & ATTR_WDUMMY)
 961                                 continue;
 962
 963                         ptr += utf8encode(gp->u, ptr);
 964                 }
 965
 966                 /*
 967                  * Copy and pasting of line endings is inconsistent
 968                  * in the inconsistent terminal and GUI world.
 969                  * The best solution seems like to produce '\n' when
 970                  * something is copied from st and convert '\n' to
 971                  * '\r', when something to be pasted is received by
 972                  * st.
 973                  * FIXME: Fix the computer world.
 974                  */
 975                 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
 976                         *ptr++ = '\n';
 977         }
 978         *ptr = 0;
 979         return str;
 980 }
 981
 982 void
 983 selcopy(Time t) {
 984         xsetsel(getsel(), t);
 985 }
 986
 987 void
 988 selnotify(XEvent *e) {
 989         ulong nitems, ofs, rem;
 990         int format;
 991         uchar *data, *last, *repl;
 992         Atom type;
 993         XSelectionEvent *xsev;
 994
 995         ofs = 0;
 996         xsev = &e->xselection;
 997         if (xsev->property == None)
 998             return;
 999         do {
1000                 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1001                                         BUFSIZ/4, False, AnyPropertyType,
1002                                         &type, &format, &nitems, &rem,
1003                                         &data)) {
1004                         fprintf(stderr, "Clipboard allocation failed\n");
1005                         return;
1006                 }
1007
1008                 /*
1009                  * As seen in getsel:
1010                  * Line endings are inconsistent in the terminal and GUI world
1011                  * copy and pasting. When receiving some selection data,
1012                  * replace all '\n' with '\r'.
1013                  * FIXME: Fix the computer world.
1014                  */
1015                 repl = data;
1016                 last = data + nitems * format / 8;
1017                 while((repl = memchr(repl, '\n', last - repl))) {
1018                         *repl++ = '\r';
1019                 }
1020
1021                 if(IS_SET(MODE_BRCKTPASTE))
1022                         ttywrite("\033[200~", 6);
1023                 ttysend((char *)data, nitems * format / 8);
1024                 if(IS_SET(MODE_BRCKTPASTE))
1025                         ttywrite("\033[201~", 6);
1026                 XFree(data);
1027                 /* number of 32-bit chunks returned */
1028                 ofs += nitems * format / 32;
1029         } while(rem > 0);
1030 }
1031
1032 void
1033 selpaste(const Arg *dummy) {
1034         XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1035                         xw.win, CurrentTime);
1036 }
1037
1038 void
1039 clipcopy(const Arg *dummy) {
1040         Atom clipboard;
1041
1042         if(sel.clipboard != NULL)
1043                 free(sel.clipboard);
1044
1045         if(sel.primary != NULL) {
1046                 sel.clipboard = xstrdup(sel.primary);
1047                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1048                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1049         }
1050 }
1051
1052 void
1053 clippaste(const Arg *dummy) {
1054         Atom clipboard;
1055
1056         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1057         XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1058                         xw.win, CurrentTime);
1059 }
1060
1061 void
1062 selclear(XEvent *e) {
1063         if(sel.ob.x == -1)
1064                 return;
1065         sel.ob.x = -1;
1066         tsetdirt(sel.nb.y, sel.ne.y);
1067 }
1068
1069 void
1070 selrequest(XEvent *e) {
1071         XSelectionRequestEvent *xsre;
1072         XSelectionEvent xev;
1073         Atom xa_targets, string, clipboard;
1074         char *seltext;
1075
1076         xsre = (XSelectionRequestEvent *) e;
1077         xev.type = SelectionNotify;
1078         xev.requestor = xsre->requestor;
1079         xev.selection = xsre->selection;
1080         xev.target = xsre->target;
1081         xev.time = xsre->time;
1082         if (xsre->property == None)
1083             xsre->property = xsre->target;
1084
1085         /* reject */
1086         xev.property = None;
1087
1088         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1089         if(xsre->target == xa_targets) {
1090                 /* respond with the supported type */
1091                 string = sel.xtarget;
1092                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1093                                 XA_ATOM, 32, PropModeReplace,
1094                                 (uchar *) &string, 1);
1095                 xev.property = xsre->property;
1096         } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1097                 /*
1098                  * xith XA_STRING non ascii characters may be incorrect in the
1099                  * requestor. It is not our problem, use utf8.
1100                  */
1101                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1102                 if(xsre->selection == XA_PRIMARY) {
1103                         seltext = sel.primary;
1104                 } else if(xsre->selection == clipboard) {
1105                         seltext = sel.clipboard;
1106                 } else {
1107                         fprintf(stderr,
1108                                 "Unhandled clipboard selection 0x%lx\n",
1109                                 xsre->selection);
1110                         return;
1111                 }
1112                 if(seltext != NULL) {
1113                         XChangeProperty(xsre->display, xsre->requestor,
1114                                         xsre->property, xsre->target,
1115                                         8, PropModeReplace,
1116                                         (uchar *)seltext, strlen(seltext));
1117                         xev.property = xsre->property;
1118                 }
1119         }
1120
1121         /* all done, send a notification to the listener */
1122         if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1123                 fprintf(stderr, "Error sending SelectionNotify event\n");
1124 }
1125
1126 void
1127 xsetsel(char *str, Time t) {
1128         free(sel.primary);
1129         sel.primary = str;
1130
1131         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1132         if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1133             selclear(0);
1134 }
1135
1136 void
1137 brelease(XEvent *e) {
1138         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1139                 mousereport(e);
1140                 return;
1141         }
1142
1143         if(e->xbutton.button == Button2) {
1144                 selpaste(NULL);
1145         } else if(e->xbutton.button == Button1) {
1146                 if(sel.mode < 2) {
1147                         selclear(NULL);
1148                 } else {
1149                         getbuttoninfo(e);
1150                         selcopy(e->xbutton.time);
1151                 }
1152                 sel.mode = 0;
1153                 tsetdirt(sel.nb.y, sel.ne.y);
1154         }
1155 }
1156
1157 void
1158 bmotion(XEvent *e) {
1159         int oldey, oldex, oldsby, oldsey;
1160
1161         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1162                 mousereport(e);
1163                 return;
1164         }
1165
1166         if(!sel.mode)
1167                 return;
1168
1169         sel.mode++;
1170         oldey = sel.oe.y;
1171         oldex = sel.oe.x;
1172         oldsby = sel.nb.y;
1173         oldsey = sel.ne.y;
1174         getbuttoninfo(e);
1175
1176         if(oldey != sel.oe.y || oldex != sel.oe.x)
1177                 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1178 }
1179
1180 void
1181 die(const char *errstr, ...) {
1182         va_list ap;
1183
1184         va_start(ap, errstr);
1185         vfprintf(stderr, errstr, ap);
1186         va_end(ap);
1187         exit(EXIT_FAILURE);
1188 }
1189
1190 void
1191 execsh(void) {
1192         char **args, *sh, *prog;
1193         const struct passwd *pw;
1194         char buf[sizeof(long) * 8 + 1];
1195
1196         errno = 0;
1197         if((pw = getpwuid(getuid())) == NULL) {
1198                 if(errno)
1199                         die("getpwuid:%s\n", strerror(errno));
1200                 else
1201                         die("who are you?\n");
1202         }
1203
1204         if (!(sh = getenv("SHELL"))) {
1205                 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1206         }
1207
1208         if(opt_cmd)
1209                 prog = opt_cmd[0];
1210         else if(utmp)
1211                 prog = utmp;
1212         else
1213                 prog = sh;
1214         args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1215
1216         snprintf(buf, sizeof(buf), "%lu", xw.win);
1217
1218         unsetenv("COLUMNS");
1219         unsetenv("LINES");
1220         unsetenv("TERMCAP");
1221         setenv("LOGNAME", pw->pw_name, 1);
1222         setenv("USER", pw->pw_name, 1);
1223         setenv("SHELL", sh, 1);
1224         setenv("HOME", pw->pw_dir, 1);
1225         setenv("TERM", termname, 1);
1226         setenv("WINDOWID", buf, 1);
1227
1228         signal(SIGCHLD, SIG_DFL);
1229         signal(SIGHUP, SIG_DFL);
1230         signal(SIGINT, SIG_DFL);
1231         signal(SIGQUIT, SIG_DFL);
1232         signal(SIGTERM, SIG_DFL);
1233         signal(SIGALRM, SIG_DFL);
1234
1235         execvp(prog, args);
1236         _exit(EXIT_FAILURE);
1237 }
1238
1239 void
1240 sigchld(int a) {
1241         int stat, ret;
1242
1243         if(waitpid(pid, &stat, 0) < 0)
1244                 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1245
1246         ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1247         if (ret != EXIT_SUCCESS)
1248                 die("child finished with error '%d'\n", stat);
1249         exit(EXIT_SUCCESS);
1250 }
1251
1252
1253 void
1254 stty(void)
1255 {
1256         char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1257         size_t n, siz;
1258
1259         if((n = strlen(stty_args)) > sizeof(cmd)-1)
1260                 die("incorrect stty parameters\n");
1261         memcpy(cmd, stty_args, n);
1262         q = cmd + n;
1263         siz = sizeof(cmd) - n;
1264         for(p = opt_cmd; p && (s = *p); ++p) {
1265                 if((n = strlen(s)) > siz-1)
1266                         die("stty parameter length too long\n");
1267                 *q++ = ' ';
1268                 q = memcpy(q, s, n);
1269                 q += n;
1270                 siz-= n + 1;
1271         }
1272         *q = '\0';
1273         if (system(cmd) != 0)
1274             perror("Couldn't call stty");
1275 }
1276
1277 void
1278 ttynew(void) {
1279         int m, s;
1280         struct winsize w = {term.row, term.col, 0, 0};
1281
1282         if(opt_io) {
1283                 term.mode |= MODE_PRINT;
1284                 iofd = (!strcmp(opt_io, "-")) ?
1285                           STDOUT_FILENO :
1286                           open(opt_io, O_WRONLY | O_CREAT, 0666);
1287                 if(iofd < 0) {
1288                         fprintf(stderr, "Error opening %s:%s\n",
1289                                 opt_io, strerror(errno));
1290                 }
1291         }
1292
1293         if (opt_line) {
1294                 if((cmdfd = open(opt_line, O_RDWR)) < 0)
1295                         die("open line failed: %s\n", strerror(errno));
1296                 close(STDIN_FILENO);
1297                 dup(cmdfd);
1298                 stty();
1299                 return;
1300         }
1301
1302         /* seems to work fine on linux, openbsd and freebsd */
1303         if(openpty(&m, &s, NULL, NULL, &w) < 0)
1304                 die("openpty failed: %s\n", strerror(errno));
1305
1306         switch(pid = fork()) {
1307         case -1:
1308                 die("fork failed\n");
1309                 break;
1310         case 0:
1311                 close(iofd);
1312                 setsid(); /* create a new process group */
1313                 dup2(s, STDIN_FILENO);
1314                 dup2(s, STDOUT_FILENO);
1315                 dup2(s, STDERR_FILENO);
1316                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1317                         die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1318                 close(s);
1319                 close(m);
1320                 execsh();
1321                 break;
1322         default:
1323                 close(s);
1324                 cmdfd = m;
1325                 signal(SIGCHLD, sigchld);
1326                 break;
1327         }
1328 }
1329
1330 void
1331 ttyread(void) {
1332         static char buf[BUFSIZ];
1333         static int buflen = 0;
1334         char *ptr;
1335         char s[UTF_SIZ];
1336         int charsize; /* size of utf8 char in bytes */
1337         long unicodep;
1338         int ret;
1339
1340         /* append read bytes to unprocessed bytes */
1341         if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1342                 die("Couldn't read from shell: %s\n", strerror(errno));
1343
1344         /* process every complete utf8 char */
1345         buflen += ret;
1346         ptr = buf;
1347         while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1348                 utf8encode(unicodep, s);
1349                 tputc(s, charsize);
1350                 ptr += charsize;
1351                 buflen -= charsize;
1352         }
1353
1354         /* keep any uncomplete utf8 char for the next call */
1355         memmove(buf, ptr, buflen);
1356 }
1357
1358 void
1359 ttywrite(const char *s, size_t n) {
1360         if(xwrite(cmdfd, s, n) == -1)
1361                 die("write error on tty: %s\n", strerror(errno));
1362 }
1363
1364 void
1365 ttysend(char *s, size_t n) {
1366         ttywrite(s, n);
1367         if(IS_SET(MODE_ECHO))
1368                 techo(s, n);
1369 }
1370
1371 void
1372 ttyresize(void) {
1373         struct winsize w;
1374
1375         w.ws_row = term.row;
1376         w.ws_col = term.col;
1377         w.ws_xpixel = xw.tw;
1378         w.ws_ypixel = xw.th;
1379         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1380                 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1381 }
1382
1383 int
1384 tattrset(int attr) {
1385         int i, j;
1386
1387         for(i = 0; i < term.row-1; i++) {
1388                 for(j = 0; j < term.col-1; j++) {
1389                         if(term.line[i][j].mode & attr)
1390                                 return 1;
1391                 }
1392         }
1393
1394         return 0;
1395 }
1396
1397 void
1398 tsetdirt(int top, int bot) {
1399         int i;
1400
1401         LIMIT(top, 0, term.row-1);
1402         LIMIT(bot, 0, term.row-1);
1403
1404         for(i = top; i <= bot; i++)
1405                 term.dirty[i] = 1;
1406 }
1407
1408 void
1409 tsetdirtattr(int attr) {
1410         int i, j;
1411
1412         for(i = 0; i < term.row-1; i++) {
1413                 for(j = 0; j < term.col-1; j++) {
1414                         if(term.line[i][j].mode & attr) {
1415                                 tsetdirt(i, i);
1416                                 break;
1417                         }
1418                 }
1419         }
1420 }
1421
1422 void
1423 tfulldirt(void) {
1424         tsetdirt(0, term.row-1);
1425 }
1426
1427 void
1428 tcursor(int mode) {
1429         static TCursor c[2];
1430         bool alt = IS_SET(MODE_ALTSCREEN);
1431
1432         if(mode == CURSOR_SAVE) {
1433                 c[alt] = term.c;
1434         } else if(mode == CURSOR_LOAD) {
1435                 term.c = c[alt];
1436                 tmoveto(c[alt].x, c[alt].y);
1437         }
1438 }
1439
1440 void
1441 treset(void) {
1442         uint i;
1443
1444         term.c = (TCursor){{
1445                 .mode = ATTR_NULL,
1446                 .fg = defaultfg,
1447                 .bg = defaultbg
1448         }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1449
1450         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1451         for(i = tabspaces; i < term.col; i += tabspaces)
1452                 term.tabs[i] = 1;
1453         term.top = 0;
1454         term.bot = term.row - 1;
1455         term.mode = MODE_WRAP;
1456         memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1457         term.charset = 0;
1458
1459         for(i = 0; i < 2; i++) {
1460                 tmoveto(0, 0);
1461                 tcursor(CURSOR_SAVE);
1462                 tclearregion(0, 0, term.col-1, term.row-1);
1463                 tswapscreen();
1464         }
1465 }
1466
1467 void
1468 tnew(int col, int row) {
1469         term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1470         tresize(col, row);
1471         term.numlock = 1;
1472
1473         treset();
1474 }
1475
1476 void
1477 tswapscreen(void) {
1478         Line *tmp = term.line;
1479
1480         term.line = term.alt;
1481         term.alt = tmp;
1482         term.mode ^= MODE_ALTSCREEN;
1483         tfulldirt();
1484 }
1485
1486 void
1487 tscrolldown(int orig, int n) {
1488         int i;
1489         Line temp;
1490
1491         LIMIT(n, 0, term.bot-orig+1);
1492
1493         tsetdirt(orig, term.bot-n);
1494         tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1495
1496         for(i = term.bot; i >= orig+n; i--) {
1497                 temp = term.line[i];
1498                 term.line[i] = term.line[i-n];
1499                 term.line[i-n] = temp;
1500         }
1501
1502         selscroll(orig, n);
1503 }
1504
1505 void
1506 tscrollup(int orig, int n) {
1507         int i;
1508         Line temp;
1509
1510         LIMIT(n, 0, term.bot-orig+1);
1511
1512         tclearregion(0, orig, term.col-1, orig+n-1);
1513         tsetdirt(orig+n, term.bot);
1514
1515         for(i = orig; i <= term.bot-n; i++) {
1516                 temp = term.line[i];
1517                 term.line[i] = term.line[i+n];
1518                 term.line[i+n] = temp;
1519         }
1520
1521         selscroll(orig, -n);
1522 }
1523
1524 void
1525 selscroll(int orig, int n) {
1526         if(sel.ob.x == -1)
1527                 return;
1528
1529         if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1530                 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1531                         selclear(NULL);
1532                         return;
1533                 }
1534                 if(sel.type == SEL_RECTANGULAR) {
1535                         if(sel.ob.y < term.top)
1536                                 sel.ob.y = term.top;
1537                         if(sel.oe.y > term.bot)
1538                                 sel.oe.y = term.bot;
1539                 } else {
1540                         if(sel.ob.y < term.top) {
1541                                 sel.ob.y = term.top;
1542                                 sel.ob.x = 0;
1543                         }
1544                         if(sel.oe.y > term.bot) {
1545                                 sel.oe.y = term.bot;
1546                                 sel.oe.x = term.col;
1547                         }
1548                 }
1549                 selnormalize();
1550         }
1551 }
1552
1553 void
1554 tnewline(int first_col) {
1555         int y = term.c.y;
1556
1557         if(y == term.bot) {
1558                 tscrollup(term.top, 1);
1559         } else {
1560                 y++;
1561         }
1562         tmoveto(first_col ? 0 : term.c.x, y);
1563 }
1564
1565 void
1566 csiparse(void) {
1567         char *p = csiescseq.buf, *np;
1568         long int v;
1569
1570         csiescseq.narg = 0;
1571         if(*p == '?') {
1572                 csiescseq.priv = 1;
1573                 p++;
1574         }
1575
1576         csiescseq.buf[csiescseq.len] = '\0';
1577         while(p < csiescseq.buf+csiescseq.len) {
1578                 np = NULL;
1579                 v = strtol(p, &np, 10);
1580                 if(np == p)
1581                         v = 0;
1582                 if(v == LONG_MAX || v == LONG_MIN)
1583                         v = -1;
1584                 csiescseq.arg[csiescseq.narg++] = v;
1585                 p = np;
1586                 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1587                         break;
1588                 p++;
1589         }
1590         csiescseq.mode[0] = *p++;
1591         csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1592 }
1593
1594 /* for absolute user moves, when decom is set */
1595 void
1596 tmoveato(int x, int y) {
1597         tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1598 }
1599
1600 void
1601 tmoveto(int x, int y) {
1602         int miny, maxy;
1603
1604         if(term.c.state & CURSOR_ORIGIN) {
1605                 miny = term.top;
1606                 maxy = term.bot;
1607         } else {
1608                 miny = 0;
1609                 maxy = term.row - 1;
1610         }
1611         term.c.state &= ~CURSOR_WRAPNEXT;
1612         term.c.x = LIMIT(x, 0, term.col-1);
1613         term.c.y = LIMIT(y, miny, maxy);
1614 }
1615
1616 void
1617 tsetchar(char *c, Glyph *attr, int x, int y) {
1618         static char *vt100_0[62] = { /* 0x41 - 0x7e */
1619                 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1620                 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1621                 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1622                 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1623                 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1624                 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1625                 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1626                 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1627         };
1628
1629         /*
1630          * The table is proudly stolen from rxvt.
1631          */
1632         if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1633                 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1634                         c = vt100_0[c[0] - 0x41];
1635                 }
1636         }
1637
1638         if(term.line[y][x].mode & ATTR_WIDE) {
1639                 if(x+1 < term.col) {
1640                         term.line[y][x+1].u = ' ';
1641                         term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1642                 }
1643         } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1644                 term.line[y][x-1].u = ' ';
1645                 term.line[y][x-1].mode &= ~ATTR_WIDE;
1646         }
1647
1648         term.dirty[y] = 1;
1649         term.line[y][x] = *attr;
1650         utf8decode(c, &term.line[y][x].u, UTF_SIZ);
1651 }
1652
1653 void
1654 tclearregion(int x1, int y1, int x2, int y2) {
1655         int x, y, temp;
1656         Glyph *gp;
1657
1658         if(x1 > x2)
1659                 temp = x1, x1 = x2, x2 = temp;
1660         if(y1 > y2)
1661                 temp = y1, y1 = y2, y2 = temp;
1662
1663         LIMIT(x1, 0, term.col-1);
1664         LIMIT(x2, 0, term.col-1);
1665         LIMIT(y1, 0, term.row-1);
1666         LIMIT(y2, 0, term.row-1);
1667
1668         for(y = y1; y <= y2; y++) {
1669                 term.dirty[y] = 1;
1670                 for(x = x1; x <= x2; x++) {
1671                         gp = &term.line[y][x];
1672                         if(selected(x, y))
1673                                 selclear(NULL);
1674                         gp->fg = term.c.attr.fg;
1675                         gp->bg = term.c.attr.bg;
1676                         gp->mode = 0;
1677                         gp->u = ' ';
1678                 }
1679         }
1680 }
1681
1682 void
1683 tdeletechar(int n) {
1684         int dst, src, size;
1685         Glyph *line;
1686
1687         LIMIT(n, 0, term.col - term.c.x);
1688
1689         dst = term.c.x;
1690         src = term.c.x + n;
1691         size = term.col - src;
1692         line = term.line[term.c.y];
1693
1694         memmove(&line[dst], &line[src], size * sizeof(Glyph));
1695         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1696 }
1697
1698 void
1699 tinsertblank(int n) {
1700         int dst, src, size;
1701         Glyph *line;
1702
1703         LIMIT(n, 0, term.col - term.c.x);
1704
1705         dst = term.c.x + n;
1706         src = term.c.x;
1707         size = term.col - dst;
1708         line = term.line[term.c.y];
1709
1710         memmove(&line[dst], &line[src], size * sizeof(Glyph));
1711         tclearregion(src, term.c.y, dst - 1, term.c.y);
1712 }
1713
1714 void
1715 tinsertblankline(int n) {
1716         if(BETWEEN(term.c.y, term.top, term.bot))
1717                 tscrolldown(term.c.y, n);
1718 }
1719
1720 void
1721 tdeleteline(int n) {
1722         if(BETWEEN(term.c.y, term.top, term.bot))
1723                 tscrollup(term.c.y, n);
1724 }
1725
1726 int32_t
1727 tdefcolor(int *attr, int *npar, int l) {
1728         int32_t idx = -1;
1729         uint r, g, b;
1730
1731         switch (attr[*npar + 1]) {
1732         case 2: /* direct color in RGB space */
1733                 if (*npar + 4 >= l) {
1734                         fprintf(stderr,
1735                                 "erresc(38): Incorrect number of parameters (%d)\n",
1736                                 *npar);
1737                         break;
1738                 }
1739                 r = attr[*npar + 2];
1740                 g = attr[*npar + 3];
1741                 b = attr[*npar + 4];
1742                 *npar += 4;
1743                 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1744                         fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1745                                 r, g, b);
1746                 else
1747                         idx = TRUECOLOR(r, g, b);
1748                 break;
1749         case 5: /* indexed color */
1750                 if (*npar + 2 >= l) {
1751                         fprintf(stderr,
1752                                 "erresc(38): Incorrect number of parameters (%d)\n",
1753                                 *npar);
1754                         break;
1755                 }
1756                 *npar += 2;
1757                 if(!BETWEEN(attr[*npar], 0, 255))
1758                         fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1759                 else
1760                         idx = attr[*npar];
1761                 break;
1762         case 0: /* implemented defined (only foreground) */
1763         case 1: /* transparent */
1764         case 3: /* direct color in CMY space */
1765         case 4: /* direct color in CMYK space */
1766         default:
1767                 fprintf(stderr,
1768                         "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1769                 break;
1770         }
1771
1772         return idx;
1773 }
1774
1775 void
1776 tsetattr(int *attr, int l) {
1777         int i;
1778         int32_t idx;
1779
1780         for(i = 0; i < l; i++) {
1781                 switch(attr[i]) {
1782                 case 0:
1783                         term.c.attr.mode &= ~(
1784                                 ATTR_BOLD       |
1785                                 ATTR_FAINT      |
1786                                 ATTR_ITALIC     |
1787                                 ATTR_UNDERLINE  |
1788                                 ATTR_BLINK      |
1789                                 ATTR_REVERSE    |
1790                                 ATTR_INVISIBLE  |
1791                                 ATTR_STRUCK     );
1792                         term.c.attr.fg = defaultfg;
1793                         term.c.attr.bg = defaultbg;
1794                         break;
1795                 case 1:
1796                         term.c.attr.mode |= ATTR_BOLD;
1797                         break;
1798                 case 2:
1799                         term.c.attr.mode |= ATTR_FAINT;
1800                         break;
1801                 case 3:
1802                         term.c.attr.mode |= ATTR_ITALIC;
1803                         break;
1804                 case 4:
1805                         term.c.attr.mode |= ATTR_UNDERLINE;
1806                         break;
1807                 case 5: /* slow blink */
1808                         /* FALLTHROUGH */
1809                 case 6: /* rapid blink */
1810                         term.c.attr.mode |= ATTR_BLINK;
1811                         break;
1812                 case 7:
1813                         term.c.attr.mode |= ATTR_REVERSE;
1814                         break;
1815                 case 8:
1816                         term.c.attr.mode |= ATTR_INVISIBLE;
1817                         break;
1818                 case 9:
1819                         term.c.attr.mode |= ATTR_STRUCK;
1820                         break;
1821                 case 22:
1822                         term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1823                         break;
1824                 case 23:
1825                         term.c.attr.mode &= ~ATTR_ITALIC;
1826                         break;
1827                 case 24:
1828                         term.c.attr.mode &= ~ATTR_UNDERLINE;
1829                         break;
1830                 case 25:
1831                         term.c.attr.mode &= ~ATTR_BLINK;
1832                         break;
1833                 case 27:
1834                         term.c.attr.mode &= ~ATTR_REVERSE;
1835                         break;
1836                 case 28:
1837                         term.c.attr.mode &= ~ATTR_INVISIBLE;
1838                         break;
1839                 case 29:
1840                         term.c.attr.mode &= ~ATTR_STRUCK;
1841                         break;
1842                 case 38:
1843                         if ((idx = tdefcolor(attr, &i, l)) >= 0)
1844                                 term.c.attr.fg = idx;
1845                         break;
1846                 case 39:
1847                         term.c.attr.fg = defaultfg;
1848                         break;
1849                 case 48:
1850                         if ((idx = tdefcolor(attr, &i, l)) >= 0)
1851                                 term.c.attr.bg = idx;
1852                         break;
1853                 case 49:
1854                         term.c.attr.bg = defaultbg;
1855                         break;
1856                 default:
1857                         if(BETWEEN(attr[i], 30, 37)) {
1858                                 term.c.attr.fg = attr[i] - 30;
1859                         } else if(BETWEEN(attr[i], 40, 47)) {
1860                                 term.c.attr.bg = attr[i] - 40;
1861                         } else if(BETWEEN(attr[i], 90, 97)) {
1862                                 term.c.attr.fg = attr[i] - 90 + 8;
1863                         } else if(BETWEEN(attr[i], 100, 107)) {
1864                                 term.c.attr.bg = attr[i] - 100 + 8;
1865                         } else {
1866                                 fprintf(stderr,
1867                                         "erresc(default): gfx attr %d unknown\n",
1868                                         attr[i]), csidump();
1869                         }
1870                         break;
1871                 }
1872         }
1873 }
1874
1875 void
1876 tsetscroll(int t, int b) {
1877         int temp;
1878
1879         LIMIT(t, 0, term.row-1);
1880         LIMIT(b, 0, term.row-1);
1881         if(t > b) {
1882                 temp = t;
1883                 t = b;
1884                 b = temp;
1885         }
1886         term.top = t;
1887         term.bot = b;
1888 }
1889
1890 void
1891 tsetmode(bool priv, bool set, int *args, int narg) {
1892         int *lim, mode;
1893         bool alt;
1894
1895         for(lim = args + narg; args < lim; ++args) {
1896                 if(priv) {
1897                         switch(*args) {
1898                         case 1: /* DECCKM -- Cursor key */
1899                                 MODBIT(term.mode, set, MODE_APPCURSOR);
1900                                 break;
1901                         case 5: /* DECSCNM -- Reverse video */
1902                                 mode = term.mode;
1903                                 MODBIT(term.mode, set, MODE_REVERSE);
1904                                 if(mode != term.mode)
1905                                         redraw();
1906                                 break;
1907                         case 6: /* DECOM -- Origin */
1908                                 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1909                                 tmoveato(0, 0);
1910                                 break;
1911                         case 7: /* DECAWM -- Auto wrap */
1912                                 MODBIT(term.mode, set, MODE_WRAP);
1913                                 break;
1914                         case 0:  /* Error (IGNORED) */
1915                         case 2:  /* DECANM -- ANSI/VT52 (IGNORED) */
1916                         case 3:  /* DECCOLM -- Column  (IGNORED) */
1917                         case 4:  /* DECSCLM -- Scroll (IGNORED) */
1918                         case 8:  /* DECARM -- Auto repeat (IGNORED) */
1919                         case 18: /* DECPFF -- Printer feed (IGNORED) */
1920                         case 19: /* DECPEX -- Printer extent (IGNORED) */
1921                         case 42: /* DECNRCM -- National characters (IGNORED) */
1922                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
1923                                 break;
1924                         case 25: /* DECTCEM -- Text Cursor Enable Mode */
1925                                 MODBIT(term.mode, !set, MODE_HIDE);
1926                                 break;
1927                         case 9:    /* X10 mouse compatibility mode */
1928                                 xsetpointermotion(0);
1929                                 MODBIT(term.mode, 0, MODE_MOUSE);
1930                                 MODBIT(term.mode, set, MODE_MOUSEX10);
1931                                 break;
1932                         case 1000: /* 1000: report button press */
1933                                 xsetpointermotion(0);
1934                                 MODBIT(term.mode, 0, MODE_MOUSE);
1935                                 MODBIT(term.mode, set, MODE_MOUSEBTN);
1936                                 break;
1937                         case 1002: /* 1002: report motion on button press */
1938                                 xsetpointermotion(0);
1939                                 MODBIT(term.mode, 0, MODE_MOUSE);
1940                                 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1941                                 break;
1942                         case 1003: /* 1003: enable all mouse motions */
1943                                 xsetpointermotion(set);
1944                                 MODBIT(term.mode, 0, MODE_MOUSE);
1945                                 MODBIT(term.mode, set, MODE_MOUSEMANY);
1946                                 break;
1947                         case 1004: /* 1004: send focus events to tty */
1948                                 MODBIT(term.mode, set, MODE_FOCUS);
1949                                 break;
1950                         case 1006: /* 1006: extended reporting mode */
1951                                 MODBIT(term.mode, set, MODE_MOUSESGR);
1952                                 break;
1953                         case 1034:
1954                                 MODBIT(term.mode, set, MODE_8BIT);
1955                                 break;
1956                         case 1049: /* swap screen & set/restore cursor as xterm */
1957                                 if (!allowaltscreen)
1958                                         break;
1959                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1960                                 /* FALLTHROUGH */
1961                         case 47: /* swap screen */
1962                         case 1047:
1963                                 if (!allowaltscreen)
1964                                         break;
1965                                 alt = IS_SET(MODE_ALTSCREEN);
1966                                 if(alt) {
1967                                         tclearregion(0, 0, term.col-1,
1968                                                         term.row-1);
1969                                 }
1970                                 if(set ^ alt) /* set is always 1 or 0 */
1971                                         tswapscreen();
1972                                 if(*args != 1049)
1973                                         break;
1974                                 /* FALLTHROUGH */
1975                         case 1048:
1976                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1977                                 break;
1978                         case 2004: /* 2004: bracketed paste mode */
1979                                 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1980                                 break;
1981                         /* Not implemented mouse modes. See comments there. */
1982                         case 1001: /* mouse highlight mode; can hang the
1983                                       terminal by design when implemented. */
1984                         case 1005: /* UTF-8 mouse mode; will confuse
1985                                       applications not supporting UTF-8
1986                                       and luit. */
1987                         case 1015: /* urxvt mangled mouse mode; incompatible
1988                                       and can be mistaken for other control
1989                                       codes. */
1990                         default:
1991                                 fprintf(stderr,
1992                                         "erresc: unknown private set/reset mode %d\n",
1993                                         *args);
1994                                 break;
1995                         }
1996                 } else {
1997                         switch(*args) {
1998                         case 0:  /* Error (IGNORED) */
1999                                 break;
2000                         case 2:  /* KAM -- keyboard action */
2001                                 MODBIT(term.mode, set, MODE_KBDLOCK);
2002                                 break;
2003                         case 4:  /* IRM -- Insertion-replacement */
2004                                 MODBIT(term.mode, set, MODE_INSERT);
2005                                 break;
2006                         case 12: /* SRM -- Send/Receive */
2007                                 MODBIT(term.mode, !set, MODE_ECHO);
2008                                 break;
2009                         case 20: /* LNM -- Linefeed/new line */
2010                                 MODBIT(term.mode, set, MODE_CRLF);
2011                                 break;
2012                         default:
2013                                 fprintf(stderr,
2014                                         "erresc: unknown set/reset mode %d\n",
2015                                         *args);
2016                                 break;
2017                         }
2018                 }
2019         }
2020 }
2021
2022 void
2023 csihandle(void) {
2024         char buf[40];
2025         int len;
2026
2027         switch(csiescseq.mode[0]) {
2028         default:
2029         unknown:
2030                 fprintf(stderr, "erresc: unknown csi ");
2031                 csidump();
2032                 /* die(""); */
2033                 break;
2034         case '@': /* ICH -- Insert <n> blank char */
2035                 DEFAULT(csiescseq.arg[0], 1);
2036                 tinsertblank(csiescseq.arg[0]);
2037                 break;
2038         case 'A': /* CUU -- Cursor <n> Up */
2039                 DEFAULT(csiescseq.arg[0], 1);
2040                 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2041                 break;
2042         case 'B': /* CUD -- Cursor <n> Down */
2043         case 'e': /* VPR --Cursor <n> Down */
2044                 DEFAULT(csiescseq.arg[0], 1);
2045                 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2046                 break;
2047         case 'i': /* MC -- Media Copy */
2048                 switch(csiescseq.arg[0]) {
2049                 case 0:
2050                         tdump();
2051                         break;
2052                 case 1:
2053                         tdumpline(term.c.y);
2054                         break;
2055                 case 2:
2056                         tdumpsel();
2057                         break;
2058                 case 4:
2059                         term.mode &= ~MODE_PRINT;
2060                         break;
2061                 case 5:
2062                         term.mode |= MODE_PRINT;
2063                         break;
2064                 }
2065                 break;
2066         case 'c': /* DA -- Device Attributes */
2067                 if(csiescseq.arg[0] == 0)
2068                         ttywrite(vtiden, sizeof(vtiden) - 1);
2069                 break;
2070         case 'C': /* CUF -- Cursor <n> Forward */
2071         case 'a': /* HPR -- Cursor <n> Forward */
2072                 DEFAULT(csiescseq.arg[0], 1);
2073                 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2074                 break;
2075         case 'D': /* CUB -- Cursor <n> Backward */
2076                 DEFAULT(csiescseq.arg[0], 1);
2077                 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2078                 break;
2079         case 'E': /* CNL -- Cursor <n> Down and first col */
2080                 DEFAULT(csiescseq.arg[0], 1);
2081                 tmoveto(0, term.c.y+csiescseq.arg[0]);
2082                 break;
2083         case 'F': /* CPL -- Cursor <n> Up and first col */
2084                 DEFAULT(csiescseq.arg[0], 1);
2085                 tmoveto(0, term.c.y-csiescseq.arg[0]);
2086                 break;
2087         case 'g': /* TBC -- Tabulation clear */
2088                 switch(csiescseq.arg[0]) {
2089                 case 0: /* clear current tab stop */
2090                         term.tabs[term.c.x] = 0;
2091                         break;
2092                 case 3: /* clear all the tabs */
2093                         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2094                         break;
2095                 default:
2096                         goto unknown;
2097                 }
2098                 break;
2099         case 'G': /* CHA -- Move to <col> */
2100         case '`': /* HPA */
2101                 DEFAULT(csiescseq.arg[0], 1);
2102                 tmoveto(csiescseq.arg[0]-1, term.c.y);
2103                 break;
2104         case 'H': /* CUP -- Move to <row> <col> */
2105         case 'f': /* HVP */
2106                 DEFAULT(csiescseq.arg[0], 1);
2107                 DEFAULT(csiescseq.arg[1], 1);
2108                 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2109                 break;
2110         case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2111                 DEFAULT(csiescseq.arg[0], 1);
2112                 tputtab(csiescseq.arg[0]);
2113                 break;
2114         case 'J': /* ED -- Clear screen */
2115                 selclear(NULL);
2116                 switch(csiescseq.arg[0]) {
2117                 case 0: /* below */
2118                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2119                         if(term.c.y < term.row-1) {
2120                                 tclearregion(0, term.c.y+1, term.col-1,
2121                                                 term.row-1);
2122                         }
2123                         break;
2124                 case 1: /* above */
2125                         if(term.c.y > 1)
2126                                 tclearregion(0, 0, term.col-1, term.c.y-1);
2127                         tclearregion(0, term.c.y, term.c.x, term.c.y);
2128                         break;
2129                 case 2: /* all */
2130                         tclearregion(0, 0, term.col-1, term.row-1);
2131                         break;
2132                 default:
2133                         goto unknown;
2134                 }
2135                 break;
2136         case 'K': /* EL -- Clear line */
2137                 switch(csiescseq.arg[0]) {
2138                 case 0: /* right */
2139                         tclearregion(term.c.x, term.c.y, term.col-1,
2140                                         term.c.y);
2141                         break;
2142                 case 1: /* left */
2143                         tclearregion(0, term.c.y, term.c.x, term.c.y);
2144                         break;
2145                 case 2: /* all */
2146                         tclearregion(0, term.c.y, term.col-1, term.c.y);
2147                         break;
2148                 }
2149                 break;
2150         case 'S': /* SU -- Scroll <n> line up */
2151                 DEFAULT(csiescseq.arg[0], 1);
2152                 tscrollup(term.top, csiescseq.arg[0]);
2153                 break;
2154         case 'T': /* SD -- Scroll <n> line down */
2155                 DEFAULT(csiescseq.arg[0], 1);
2156                 tscrolldown(term.top, csiescseq.arg[0]);
2157                 break;
2158         case 'L': /* IL -- Insert <n> blank lines */
2159                 DEFAULT(csiescseq.arg[0], 1);
2160                 tinsertblankline(csiescseq.arg[0]);
2161                 break;
2162         case 'l': /* RM -- Reset Mode */
2163                 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2164                 break;
2165         case 'M': /* DL -- Delete <n> lines */
2166                 DEFAULT(csiescseq.arg[0], 1);
2167                 tdeleteline(csiescseq.arg[0]);
2168                 break;
2169         case 'X': /* ECH -- Erase <n> char */
2170                 DEFAULT(csiescseq.arg[0], 1);
2171                 tclearregion(term.c.x, term.c.y,
2172                                 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2173                 break;
2174         case 'P': /* DCH -- Delete <n> char */
2175                 DEFAULT(csiescseq.arg[0], 1);
2176                 tdeletechar(csiescseq.arg[0]);
2177                 break;
2178         case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2179                 DEFAULT(csiescseq.arg[0], 1);
2180                 tputtab(-csiescseq.arg[0]);
2181                 break;
2182         case 'd': /* VPA -- Move to <row> */
2183                 DEFAULT(csiescseq.arg[0], 1);
2184                 tmoveato(term.c.x, csiescseq.arg[0]-1);
2185                 break;
2186         case 'h': /* SM -- Set terminal mode */
2187                 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2188                 break;
2189         case 'm': /* SGR -- Terminal attribute (color) */
2190                 tsetattr(csiescseq.arg, csiescseq.narg);
2191                 break;
2192         case 'n': /* DSR – Device Status Report (cursor position) */
2193                 if (csiescseq.arg[0] == 6) {
2194                         len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2195                                         term.c.y+1, term.c.x+1);
2196                         ttywrite(buf, len);
2197                 }
2198                 break;
2199         case 'r': /* DECSTBM -- Set Scrolling Region */
2200                 if(csiescseq.priv) {
2201                         goto unknown;
2202                 } else {
2203                         DEFAULT(csiescseq.arg[0], 1);
2204                         DEFAULT(csiescseq.arg[1], term.row);
2205                         tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2206                         tmoveato(0, 0);
2207                 }
2208                 break;
2209         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2210                 tcursor(CURSOR_SAVE);
2211                 break;
2212         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2213                 tcursor(CURSOR_LOAD);
2214                 break;
2215         case ' ':
2216                 switch (csiescseq.mode[1]) {
2217                         case 'q': /* DECSCUSR -- Set Cursor Style */
2218                                 DEFAULT(csiescseq.arg[0], 1);
2219                                 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2220                                         goto unknown;
2221                                 }
2222                                 xw.cursor = csiescseq.arg[0];
2223                                 break;
2224                         default:
2225                                 goto unknown;
2226                 }
2227                 break;
2228         }
2229 }
2230
2231 void
2232 csidump(void) {
2233         int i;
2234         uint c;
2235
2236         printf("ESC[");
2237         for(i = 0; i < csiescseq.len; i++) {
2238                 c = csiescseq.buf[i] & 0xff;
2239                 if(isprint(c)) {
2240                         putchar(c);
2241                 } else if(c == '\n') {
2242                         printf("(\\n)");
2243                 } else if(c == '\r') {
2244                         printf("(\\r)");
2245                 } else if(c == 0x1b) {
2246                         printf("(\\e)");
2247                 } else {
2248                         printf("(%02x)", c);
2249                 }
2250         }
2251         putchar('\n');
2252 }
2253
2254 void
2255 csireset(void) {
2256         memset(&csiescseq, 0, sizeof(csiescseq));
2257 }
2258
2259 void
2260 strhandle(void) {
2261         char *p = NULL;
2262         int j, narg, par;
2263
2264         term.esc &= ~(ESC_STR_END|ESC_STR);
2265         strparse();
2266         par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2267
2268         switch(strescseq.type) {
2269         case ']': /* OSC -- Operating System Command */
2270                 switch(par) {
2271                 case 0:
2272                 case 1:
2273                 case 2:
2274                         if(narg > 1)
2275                                 xsettitle(strescseq.args[1]);
2276                         return;
2277                 case 4: /* color set */
2278                         if(narg < 3)
2279                                 break;
2280                         p = strescseq.args[2];
2281                         /* FALLTHROUGH */
2282                 case 104: /* color reset, here p = NULL */
2283                         j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2284                         if(xsetcolorname(j, p)) {
2285                                 fprintf(stderr, "erresc: invalid color %s\n", p);
2286                         } else {
2287                                 /*
2288                                  * TODO if defaultbg color is changed, borders
2289                                  * are dirty
2290                                  */
2291                                 redraw();
2292                         }
2293                         return;
2294                 }
2295                 break;
2296         case 'k': /* old title set compatibility */
2297                 xsettitle(strescseq.args[0]);
2298                 return;
2299         case 'P': /* DCS -- Device Control String */
2300         case '_': /* APC -- Application Program Command */
2301         case '^': /* PM -- Privacy Message */
2302                 return;
2303         }
2304
2305         fprintf(stderr, "erresc: unknown str ");
2306         strdump();
2307 }
2308
2309 void
2310 strparse(void) {
2311         int c;
2312         char *p = strescseq.buf;
2313
2314         strescseq.narg = 0;
2315         strescseq.buf[strescseq.len] = '\0';
2316
2317         if(*p == '\0')
2318                 return;
2319
2320         while(strescseq.narg < STR_ARG_SIZ) {
2321                 strescseq.args[strescseq.narg++] = p;
2322                 while((c = *p) != ';' && c != '\0')
2323                         ++p;
2324                 if(c == '\0')
2325                         return;
2326                 *p++ = '\0';
2327         }
2328 }
2329
2330 void
2331 strdump(void) {
2332         int i;
2333         uint c;
2334
2335         printf("ESC%c", strescseq.type);
2336         for(i = 0; i < strescseq.len; i++) {
2337                 c = strescseq.buf[i] & 0xff;
2338                 if(c == '\0') {
2339                         return;
2340                 } else if(isprint(c)) {
2341                         putchar(c);
2342                 } else if(c == '\n') {
2343                         printf("(\\n)");
2344                 } else if(c == '\r') {
2345                         printf("(\\r)");
2346                 } else if(c == 0x1b) {
2347                         printf("(\\e)");
2348                 } else {
2349                         printf("(%02x)", c);
2350                 }
2351         }
2352         printf("ESC\\\n");
2353 }
2354
2355 void
2356 strreset(void) {
2357         memset(&strescseq, 0, sizeof(strescseq));
2358 }
2359
2360 void
2361 tprinter(char *s, size_t len) {
2362         if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2363                 fprintf(stderr, "Error writing in %s:%s\n",
2364                         opt_io, strerror(errno));
2365                 close(iofd);
2366                 iofd = -1;
2367         }
2368 }
2369
2370 void
2371 toggleprinter(const Arg *arg) {
2372         term.mode ^= MODE_PRINT;
2373 }
2374
2375 void
2376 printscreen(const Arg *arg) {
2377         tdump();
2378 }
2379
2380 void
2381 printsel(const Arg *arg) {
2382         tdumpsel();
2383 }
2384
2385 void
2386 tdumpsel(void) {
2387         char *ptr;
2388
2389         if((ptr = getsel())) {
2390                 tprinter(ptr, strlen(ptr));
2391                 free(ptr);
2392         }
2393 }
2394
2395 void
2396 tdumpline(int n) {
2397         char buf[UTF_SIZ];
2398         Glyph *bp, *end;
2399
2400         bp = &term.line[n][0];
2401         end = &bp[MIN(tlinelen(n), term.col) - 1];
2402         if(bp != end || bp->u != ' ') {
2403                 for( ;bp <= end; ++bp)
2404                         tprinter(buf, utf8encode(bp->u, buf));
2405         }
2406         tprinter("\n", 1);
2407 }
2408
2409 void
2410 tdump(void) {
2411         int i;
2412
2413         for(i = 0; i < term.row; ++i)
2414                 tdumpline(i);
2415 }
2416
2417 void
2418 tputtab(int n) {
2419         uint x = term.c.x;
2420
2421         if(n > 0) {
2422                 while(x < term.col && n--)
2423                         for(++x; x < term.col && !term.tabs[x]; ++x)
2424                                 /* nothing */ ;
2425         } else if(n < 0) {
2426                 while(x > 0 && n++)
2427                         for(--x; x > 0 && !term.tabs[x]; --x)
2428                                 /* nothing */ ;
2429         }
2430         term.c.x = LIMIT(x, 0, term.col-1);
2431 }
2432
2433 void
2434 techo(char *buf, int len) {
2435         for(; len > 0; buf++, len--) {
2436                 char c = *buf;
2437
2438                 if(ISCONTROL((uchar) c)) { /* control code */
2439                         if(c & 0x80) {
2440                                 c &= 0x7f;
2441                                 tputc("^", 1);
2442                                 tputc("[", 1);
2443                         } else if(c != '\n' && c != '\r' && c != '\t') {
2444                                 c ^= 0x40;
2445                                 tputc("^", 1);
2446                         }
2447                         tputc(&c, 1);
2448                 } else {
2449                         break;
2450                 }
2451         }
2452         if(len)
2453                 tputc(buf, len);
2454 }
2455
2456 void
2457 tdeftran(char ascii) {
2458         static char cs[] = "0B";
2459         static int vcs[] = {CS_GRAPHIC0, CS_USA};
2460         char *p;
2461
2462         if((p = strchr(cs, ascii)) == NULL) {
2463                 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2464         } else {
2465                 term.trantbl[term.icharset] = vcs[p - cs];
2466         }
2467 }
2468
2469 void
2470 tdectest(char c) {
2471         static char E[UTF_SIZ] = "E";
2472         int x, y;
2473
2474         if(c == '8') { /* DEC screen alignment test. */
2475                 for(x = 0; x < term.col; ++x) {
2476                         for(y = 0; y < term.row; ++y)
2477                                 tsetchar(E, &term.c.attr, x, y);
2478                 }
2479         }
2480 }
2481
2482 void
2483 tstrsequence(uchar c) {
2484         switch (c) {
2485         case 0x90:   /* DCS -- Device Control String */
2486                 c = 'P';
2487                 break;
2488         case 0x9f:   /* APC -- Application Program Command */
2489                 c = '_';
2490                 break;
2491         case 0x9e:   /* PM -- Privacy Message */
2492                 c = '^';
2493                 break;
2494         case 0x9d:   /* OSC -- Operating System Command */
2495                 c = ']';
2496                 break;
2497         }
2498         strreset();
2499         strescseq.type = c;
2500         term.esc |= ESC_STR;
2501 }
2502
2503 void
2504 tcontrolcode(uchar ascii) {
2505         static char question[UTF_SIZ] = "?";
2506
2507         switch(ascii) {
2508         case '\t':   /* HT */
2509                 tputtab(1);
2510                 return;
2511         case '\b':   /* BS */
2512                 tmoveto(term.c.x-1, term.c.y);
2513                 return;
2514         case '\r':   /* CR */
2515                 tmoveto(0, term.c.y);
2516                 return;
2517         case '\f':   /* LF */
2518         case '\v':   /* VT */
2519         case '\n':   /* LF */
2520                 /* go to first col if the mode is set */
2521                 tnewline(IS_SET(MODE_CRLF));
2522                 return;
2523         case '\a':   /* BEL */
2524                 if(term.esc & ESC_STR_END) {
2525                         /* backwards compatibility to xterm */
2526                         strhandle();
2527                 } else {
2528                         if(!(xw.state & WIN_FOCUSED))
2529                                 xseturgency(1);
2530                         if (bellvolume)
2531                                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2532                 }
2533                 break;
2534         case '\033': /* ESC */
2535                 csireset();
2536                 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2537                 term.esc |= ESC_START;
2538                 return;
2539         case '\016': /* SO (LS1 -- Locking shift 1) */
2540         case '\017': /* SI (LS0 -- Locking shift 0) */
2541                 term.charset = 1 - (ascii - '\016');
2542                 return;
2543         case '\032': /* SUB */
2544                 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2545         case '\030': /* CAN */
2546                 csireset();
2547                 break;
2548         case '\005': /* ENQ (IGNORED) */
2549         case '\000': /* NUL (IGNORED) */
2550         case '\021': /* XON (IGNORED) */
2551         case '\023': /* XOFF (IGNORED) */
2552         case 0177:   /* DEL (IGNORED) */
2553                 return;
2554         case 0x84:   /* TODO: IND */
2555                 break;
2556         case 0x85:   /* NEL -- Next line */
2557                 tnewline(1); /* always go to first col */
2558                 break;
2559         case 0x88:   /* HTS -- Horizontal tab stop */
2560                 term.tabs[term.c.x] = 1;
2561                 break;
2562         case 0x8d:   /* TODO: RI */
2563         case 0x8e:   /* TODO: SS2 */
2564         case 0x8f:   /* TODO: SS3 */
2565         case 0x98:   /* TODO: SOS */
2566                 break;
2567         case 0x9a:   /* DECID -- Identify Terminal */
2568                 ttywrite(vtiden, sizeof(vtiden) - 1);
2569                 break;
2570         case 0x9b:   /* TODO: CSI */
2571         case 0x9c:   /* TODO: ST */
2572                 break;
2573         case 0x90:   /* DCS -- Device Control String */
2574         case 0x9f:   /* APC -- Application Program Command */
2575         case 0x9e:   /* PM -- Privacy Message */
2576         case 0x9d:   /* OSC -- Operating System Command */
2577                 tstrsequence(ascii);
2578                 return;
2579         }
2580         /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2581         term.esc &= ~(ESC_STR_END|ESC_STR);
2582 }
2583
2584 /*
2585  * returns 1 when the sequence is finished and it hasn't to read
2586  * more characters for this sequence, otherwise 0
2587  */
2588 int
2589 eschandle(uchar ascii) {
2590         switch(ascii) {
2591         case '[':
2592                 term.esc |= ESC_CSI;
2593                 return 0;
2594         case '#':
2595                 term.esc |= ESC_TEST;
2596                 return 0;
2597         case 'P': /* DCS -- Device Control String */
2598         case '_': /* APC -- Application Program Command */
2599         case '^': /* PM -- Privacy Message */
2600         case ']': /* OSC -- Operating System Command */
2601         case 'k': /* old title set compatibility */
2602                 tstrsequence(ascii);
2603                 return 0;
2604         case 'n': /* LS2 -- Locking shift 2 */
2605         case 'o': /* LS3 -- Locking shift 3 */
2606                 term.charset = 2 + (ascii - 'n');
2607                 break;
2608         case '(': /* GZD4 -- set primary charset G0 */
2609         case ')': /* G1D4 -- set secondary charset G1 */
2610         case '*': /* G2D4 -- set tertiary charset G2 */
2611         case '+': /* G3D4 -- set quaternary charset G3 */
2612                 term.icharset = ascii - '(';
2613                 term.esc |= ESC_ALTCHARSET;
2614                 return 0;
2615         case 'D': /* IND -- Linefeed */
2616                 if(term.c.y == term.bot) {
2617                         tscrollup(term.top, 1);
2618                 } else {
2619                         tmoveto(term.c.x, term.c.y+1);
2620                 }
2621                 break;
2622         case 'E': /* NEL -- Next line */
2623                 tnewline(1); /* always go to first col */
2624                 break;
2625         case 'H': /* HTS -- Horizontal tab stop */
2626                 term.tabs[term.c.x] = 1;
2627                 break;
2628         case 'M': /* RI -- Reverse index */
2629                 if(term.c.y == term.top) {
2630                         tscrolldown(term.top, 1);
2631                 } else {
2632                         tmoveto(term.c.x, term.c.y-1);
2633                 }
2634                 break;
2635         case 'Z': /* DECID -- Identify Terminal */
2636                 ttywrite(vtiden, sizeof(vtiden) - 1);
2637                 break;
2638         case 'c': /* RIS -- Reset to inital state */
2639                 treset();
2640                 xresettitle();
2641                 xloadcols();
2642                 break;
2643         case '=': /* DECPAM -- Application keypad */
2644                 term.mode |= MODE_APPKEYPAD;
2645                 break;
2646         case '>': /* DECPNM -- Normal keypad */
2647                 term.mode &= ~MODE_APPKEYPAD;
2648                 break;
2649         case '7': /* DECSC -- Save Cursor */
2650                 tcursor(CURSOR_SAVE);
2651                 break;
2652         case '8': /* DECRC -- Restore Cursor */
2653                 tcursor(CURSOR_LOAD);
2654                 break;
2655         case '\\': /* ST -- String Terminator */
2656                 if(term.esc & ESC_STR_END)
2657                         strhandle();
2658                 break;
2659         default:
2660                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2661                         (uchar) ascii, isprint(ascii)? ascii:'.');
2662                 break;
2663         }
2664         return 1;
2665 }
2666
2667 void
2668 tputc(char *c, int len) {
2669         uchar ascii;
2670         bool control;
2671         long unicodep;
2672         int width;
2673         Glyph *gp;
2674
2675         if(len == 1) {
2676                 width = 1;
2677                 unicodep = ascii = *c;
2678         } else {
2679                 utf8decode(c, &unicodep, UTF_SIZ);
2680                 if ((width = wcwidth(unicodep)) == -1) {
2681                         c = "\357\277\275";     /* UTF_INVALID */
2682                         width = 1;
2683                 }
2684                 ascii = unicodep;
2685         }
2686
2687         if(IS_SET(MODE_PRINT))
2688                 tprinter(c, len);
2689         control = ISCONTROL(unicodep);
2690
2691         /*
2692          * STR sequence must be checked before anything else
2693          * because it uses all following characters until it
2694          * receives a ESC, a SUB, a ST or any other C1 control
2695          * character.
2696          */
2697         if(term.esc & ESC_STR) {
2698                 if(len == 1 &&
2699                    (ascii == '\a' || ascii == 030 ||
2700                     ascii == 032  || ascii == 033 ||
2701                     ISCONTROLC1(unicodep))) {
2702                         term.esc &= ~(ESC_START|ESC_STR);
2703                         term.esc |= ESC_STR_END;
2704                 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2705                         memmove(&strescseq.buf[strescseq.len], c, len);
2706                         strescseq.len += len;
2707                         return;
2708                 } else {
2709                 /*
2710                  * Here is a bug in terminals. If the user never sends
2711                  * some code to stop the str or esc command, then st
2712                  * will stop responding. But this is better than
2713                  * silently failing with unknown characters. At least
2714                  * then users will report back.
2715                  *
2716                  * In the case users ever get fixed, here is the code:
2717                  */
2718                 /*
2719                  * term.esc = 0;
2720                  * strhandle();
2721                  */
2722                         return;
2723                 }
2724         }
2725
2726         /*
2727          * Actions of control codes must be performed as soon they arrive
2728          * because they can be embedded inside a control sequence, and
2729          * they must not cause conflicts with sequences.
2730          */
2731         if(control) {
2732                 tcontrolcode(ascii);
2733                 /*
2734                  * control codes are not shown ever
2735                  */
2736                 return;
2737         } else if(term.esc & ESC_START) {
2738                 if(term.esc & ESC_CSI) {
2739                         csiescseq.buf[csiescseq.len++] = ascii;
2740                         if(BETWEEN(ascii, 0x40, 0x7E)
2741                                         || csiescseq.len >= \
2742                                         sizeof(csiescseq.buf)-1) {
2743                                 term.esc = 0;
2744                                 csiparse();
2745                                 csihandle();
2746                         }
2747                         return;
2748                 } else if(term.esc & ESC_ALTCHARSET) {
2749                         tdeftran(ascii);
2750                 } else if(term.esc & ESC_TEST) {
2751                         tdectest(ascii);
2752                 } else {
2753                         if (!eschandle(ascii))
2754                                 return;
2755                         /* sequence already finished */
2756                 }
2757                 term.esc = 0;
2758                 /*
2759                  * All characters which form part of a sequence are not
2760                  * printed
2761                  */
2762                 return;
2763         }
2764         if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2765                 selclear(NULL);
2766
2767         gp = &term.line[term.c.y][term.c.x];
2768         if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2769                 gp->mode |= ATTR_WRAP;
2770                 tnewline(1);
2771                 gp = &term.line[term.c.y][term.c.x];
2772         }
2773
2774         if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2775                 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2776
2777         if(term.c.x+width > term.col) {
2778                 tnewline(1);
2779                 gp = &term.line[term.c.y][term.c.x];
2780         }
2781
2782         tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2783
2784         if(width == 2) {
2785                 gp->mode |= ATTR_WIDE;
2786                 if(term.c.x+1 < term.col) {
2787                         gp[1].u = '\0';
2788                         gp[1].mode = ATTR_WDUMMY;
2789                 }
2790         }
2791         if(term.c.x+width < term.col) {
2792                 tmoveto(term.c.x+width, term.c.y);
2793         } else {
2794                 term.c.state |= CURSOR_WRAPNEXT;
2795         }
2796 }
2797
2798 void
2799 tresize(int col, int row) {
2800         int i;
2801         int minrow = MIN(row, term.row);
2802         int mincol = MIN(col, term.col);
2803         bool *bp;
2804         TCursor c;
2805
2806         if(col < 1 || row < 1) {
2807                 fprintf(stderr,
2808                         "tresize: error resizing to %dx%d\n", col, row);
2809                 return;
2810         }
2811
2812         /*
2813          * slide screen to keep cursor where we expect it -
2814          * tscrollup would work here, but we can optimize to
2815          * memmove because we're freeing the earlier lines
2816          */
2817         for(i = 0; i <= term.c.y - row; i++) {
2818                 free(term.line[i]);
2819                 free(term.alt[i]);
2820         }
2821         /* ensure that both src and dst are not NULL */
2822         if (i > 0) {
2823                 memmove(term.line, term.line + i, row * sizeof(Line));
2824                 memmove(term.alt, term.alt + i, row * sizeof(Line));
2825         }
2826         for(i += row; i < term.row; i++) {
2827                 free(term.line[i]);
2828                 free(term.alt[i]);
2829         }
2830
2831         /* resize to new height */
2832         term.line = xrealloc(term.line, row * sizeof(Line));
2833         term.alt  = xrealloc(term.alt,  row * sizeof(Line));
2834         term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2835         term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2836
2837         /* resize each row to new width, zero-pad if needed */
2838         for(i = 0; i < minrow; i++) {
2839                 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2840                 term.alt[i]  = xrealloc(term.alt[i],  col * sizeof(Glyph));
2841         }
2842
2843         /* allocate any new rows */
2844         for(/* i == minrow */; i < row; i++) {
2845                 term.line[i] = xmalloc(col * sizeof(Glyph));
2846                 term.alt[i] = xmalloc(col * sizeof(Glyph));
2847         }
2848         if(col > term.col) {
2849                 bp = term.tabs + term.col;
2850
2851                 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2852                 while(--bp > term.tabs && !*bp)
2853                         /* nothing */ ;
2854                 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2855                         *bp = 1;
2856         }
2857         /* update terminal size */
2858         term.col = col;
2859         term.row = row;
2860         /* reset scrolling region */
2861         tsetscroll(0, row-1);
2862         /* make use of the LIMIT in tmoveto */
2863         tmoveto(term.c.x, term.c.y);
2864         /* Clearing both screens (it makes dirty all lines) */
2865         c = term.c;
2866         for(i = 0; i < 2; i++) {
2867                 if(mincol < col && 0 < minrow) {
2868                         tclearregion(mincol, 0, col - 1, minrow - 1);
2869                 }
2870                 if(0 < col && minrow < row) {
2871                         tclearregion(0, minrow, col - 1, row - 1);
2872                 }
2873                 tswapscreen();
2874                 tcursor(CURSOR_LOAD);
2875         }
2876         term.c = c;
2877 }
2878
2879 void
2880 xresize(int col, int row) {
2881         xw.tw = MAX(1, col * xw.cw);
2882         xw.th = MAX(1, row * xw.ch);
2883
2884         XFreePixmap(xw.dpy, xw.buf);
2885         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2886                         DefaultDepth(xw.dpy, xw.scr));
2887         XftDrawChange(xw.draw, xw.buf);
2888         xclear(0, 0, xw.w, xw.h);
2889 }
2890
2891 ushort
2892 sixd_to_16bit(int x) {
2893         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2894 }
2895
2896 bool
2897 xloadcolor(int i, const char *name, Color *ncolor) {
2898         XRenderColor color = { .alpha = 0xffff };
2899
2900         if(!name) {
2901                 if(BETWEEN(i, 16, 255)) { /* 256 color */
2902                         if(i < 6*6*6+16) { /* same colors as xterm */
2903                                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
2904                                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2905                                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
2906                         } else { /* greyscale */
2907                                 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
2908                                 color.green = color.blue = color.red;
2909                         }
2910                         return XftColorAllocValue(xw.dpy, xw.vis,
2911                                                   xw.cmap, &color, ncolor);
2912                 } else
2913                         name = colorname[i];
2914         }
2915         return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
2916 }
2917
2918 void
2919 xloadcols(void) {
2920         int i;
2921         static bool loaded;
2922         Color *cp;
2923
2924         if(loaded) {
2925                 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
2926                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2927         }
2928
2929         for(i = 0; i < LEN(dc.col); i++)
2930                 if(!xloadcolor(i, NULL, &dc.col[i])) {
2931                         if(colorname[i])
2932                                 die("Could not allocate color '%s'\n", colorname[i]);
2933                         else
2934                                 die("Could not allocate color %d\n", i);
2935                 }
2936         loaded = true;
2937 }
2938
2939 int
2940 xsetcolorname(int x, const char *name) {
2941         Color ncolor;
2942
2943         if(!BETWEEN(x, 0, LEN(dc.col)))
2944                 return 1;
2945
2946
2947         if(!xloadcolor(x, name, &ncolor))
2948                 return 1;
2949
2950         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2951         dc.col[x] = ncolor;
2952         return 0;
2953 }
2954
2955 void
2956 xtermclear(int col1, int row1, int col2, int row2) {
2957         XftDrawRect(xw.draw,
2958                         &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2959                         borderpx + col1 * xw.cw,
2960                         borderpx + row1 * xw.ch,
2961                         (col2-col1+1) * xw.cw,
2962                         (row2-row1+1) * xw.ch);
2963 }
2964
2965 /*
2966  * Absolute coordinates.
2967  */
2968 void
2969 xclear(int x1, int y1, int x2, int y2) {
2970         XftDrawRect(xw.draw,
2971                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2972                         x1, y1, x2-x1, y2-y1);
2973 }
2974
2975 void
2976 xhints(void) {
2977         XClassHint class = {opt_class ? opt_class : termname, termname};
2978         XWMHints wm = {.flags = InputHint, .input = 1};
2979         XSizeHints *sizeh = NULL;
2980
2981         sizeh = XAllocSizeHints();
2982
2983         sizeh->flags = PSize | PResizeInc | PBaseSize;
2984         sizeh->height = xw.h;
2985         sizeh->width = xw.w;
2986         sizeh->height_inc = xw.ch;
2987         sizeh->width_inc = xw.cw;
2988         sizeh->base_height = 2 * borderpx;
2989         sizeh->base_width = 2 * borderpx;
2990         if(xw.isfixed == True) {
2991                 sizeh->flags |= PMaxSize | PMinSize;
2992                 sizeh->min_width = sizeh->max_width = xw.w;
2993                 sizeh->min_height = sizeh->max_height = xw.h;
2994         }
2995         if(xw.gm & (XValue|YValue)) {
2996                 sizeh->flags |= USPosition | PWinGravity;
2997                 sizeh->x = xw.l;
2998                 sizeh->y = xw.t;
2999                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
3000         }
3001
3002         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
3003                         &class);
3004         XFree(sizeh);
3005 }
3006
3007 int
3008 xgeommasktogravity(int mask) {
3009         switch(mask & (XNegative|YNegative)) {
3010         case 0:
3011                 return NorthWestGravity;
3012         case XNegative:
3013                 return NorthEastGravity;
3014         case YNegative:
3015                 return SouthWestGravity;
3016         }
3017         return SouthEastGravity;
3018 }
3019
3020 int
3021 xloadfont(Font *f, FcPattern *pattern) {
3022         FcPattern *match;
3023         FcResult result;
3024
3025         match = FcFontMatch(NULL, pattern, &result);
3026         if(!match)
3027                 return 1;
3028
3029         if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3030                 FcPatternDestroy(match);
3031                 return 1;
3032         }
3033
3034         f->set = NULL;
3035         f->pattern = FcPatternDuplicate(pattern);
3036
3037         f->ascent = f->match->ascent;
3038         f->descent = f->match->descent;
3039         f->lbearing = 0;
3040         f->rbearing = f->match->max_advance_width;
3041
3042         f->height = f->ascent + f->descent;
3043         f->width = f->lbearing + f->rbearing;
3044
3045         return 0;
3046 }
3047
3048 void
3049 xloadfonts(char *fontstr, double fontsize) {
3050         FcPattern *pattern;
3051         FcResult r_sz, r_psz;
3052         double fontval;
3053         float ceilf(float);
3054
3055         if(fontstr[0] == '-') {
3056                 pattern = XftXlfdParse(fontstr, False, False);
3057         } else {
3058                 pattern = FcNameParse((FcChar8 *)fontstr);
3059         }
3060
3061         if(!pattern)
3062                 die("st: can't open font %s\n", fontstr);
3063
3064         if(fontsize > 1) {
3065                 FcPatternDel(pattern, FC_PIXEL_SIZE);
3066                 FcPatternDel(pattern, FC_SIZE);
3067                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3068                 usedfontsize = fontsize;
3069         } else {
3070                 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3071                 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3072                 if(r_psz == FcResultMatch) {
3073                         usedfontsize = fontval;
3074                 } else if(r_sz == FcResultMatch) {
3075                         usedfontsize = -1;
3076                 } else {
3077                         /*
3078                          * Default font size is 12, if none given. This is to
3079                          * have a known usedfontsize value.
3080                          */
3081                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3082                         usedfontsize = 12;
3083                 }
3084                 defaultfontsize = usedfontsize;
3085         }
3086
3087         FcConfigSubstitute(0, pattern, FcMatchPattern);
3088         FcDefaultSubstitute(pattern);
3089
3090         if(xloadfont(&dc.font, pattern))
3091                 die("st: can't open font %s\n", fontstr);
3092
3093         if(usedfontsize < 0) {
3094                 FcPatternGetDouble(dc.font.match->pattern,
3095                                    FC_PIXEL_SIZE, 0, &fontval);
3096                 usedfontsize = fontval;
3097                 if(fontsize == 0)
3098                         defaultfontsize = fontval;
3099         }
3100
3101         /* Setting character width and height. */
3102         xw.cw = ceilf(dc.font.width * cwscale);
3103         xw.ch = ceilf(dc.font.height * chscale);
3104
3105         FcPatternDel(pattern, FC_SLANT);
3106         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3107         if(xloadfont(&dc.ifont, pattern))
3108                 die("st: can't open font %s\n", fontstr);
3109
3110         FcPatternDel(pattern, FC_WEIGHT);
3111         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3112         if(xloadfont(&dc.ibfont, pattern))
3113                 die("st: can't open font %s\n", fontstr);
3114
3115         FcPatternDel(pattern, FC_SLANT);
3116         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3117         if(xloadfont(&dc.bfont, pattern))
3118                 die("st: can't open font %s\n", fontstr);
3119
3120         FcPatternDestroy(pattern);
3121 }
3122
3123 void
3124 xunloadfont(Font *f) {
3125         XftFontClose(xw.dpy, f->match);
3126         FcPatternDestroy(f->pattern);
3127         if(f->set)
3128                 FcFontSetDestroy(f->set);
3129 }
3130
3131 void
3132 xunloadfonts(void) {
3133         /* Free the loaded fonts in the font cache.  */
3134         while(frclen > 0)
3135                 XftFontClose(xw.dpy, frc[--frclen].font);
3136
3137         xunloadfont(&dc.font);
3138         xunloadfont(&dc.bfont);
3139         xunloadfont(&dc.ifont);
3140         xunloadfont(&dc.ibfont);
3141 }
3142
3143 void
3144 xzoom(const Arg *arg) {
3145         Arg larg;
3146
3147         larg.i = usedfontsize + arg->i;
3148         xzoomabs(&larg);
3149 }
3150
3151 void
3152 xzoomabs(const Arg *arg) {
3153         xunloadfonts();
3154         xloadfonts(usedfont, arg->i);
3155         cresize(0, 0);
3156         redraw();
3157         xhints();
3158 }
3159
3160 void
3161 xzoomreset(const Arg *arg) {
3162         Arg larg;
3163
3164         if(defaultfontsize > 0) {
3165                 larg.i = defaultfontsize;
3166                 xzoomabs(&larg);
3167         }
3168 }
3169
3170 void
3171 xinit(void) {
3172         XGCValues gcvalues;
3173         Cursor cursor;
3174         Window parent;
3175         pid_t thispid = getpid();
3176
3177         if(!(xw.dpy = XOpenDisplay(NULL)))
3178                 die("Can't open display\n");
3179         xw.scr = XDefaultScreen(xw.dpy);
3180         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3181
3182         /* font */
3183         if(!FcInit())
3184                 die("Could not init fontconfig.\n");
3185
3186         usedfont = (opt_font == NULL)? font : opt_font;
3187         xloadfonts(usedfont, 0);
3188
3189         /* colors */
3190         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3191         xloadcols();
3192
3193         /* adjust fixed window geometry */
3194         xw.w = 2 * borderpx + term.col * xw.cw;
3195         xw.h = 2 * borderpx + term.row * xw.ch;
3196         if(xw.gm & XNegative)
3197                 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3198         if(xw.gm & YNegative)
3199                 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3200
3201         /* Events */
3202         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3203         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3204         xw.attrs.bit_gravity = NorthWestGravity;
3205         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3206                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3207                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3208         xw.attrs.colormap = xw.cmap;
3209
3210         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3211                 parent = XRootWindow(xw.dpy, xw.scr);
3212         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3213                         xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3214                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3215                         | CWEventMask | CWColormap, &xw.attrs);
3216
3217         memset(&gcvalues, 0, sizeof(gcvalues));
3218         gcvalues.graphics_exposures = False;
3219         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3220                         &gcvalues);
3221         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3222                         DefaultDepth(xw.dpy, xw.scr));
3223         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3224         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3225
3226         /* Xft rendering context */
3227         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3228
3229         /* input methods */
3230         if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3231                 XSetLocaleModifiers("@im=local");
3232                 if((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3233                         XSetLocaleModifiers("@im=");
3234                         if((xw.xim = XOpenIM(xw.dpy,
3235                                         NULL, NULL, NULL)) == NULL) {
3236                                 die("XOpenIM failed. Could not open input"
3237                                         " device.\n");
3238                         }
3239                 }
3240         }
3241         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3242                                            | XIMStatusNothing, XNClientWindow, xw.win,
3243                                            XNFocusWindow, xw.win, NULL);
3244         if(xw.xic == NULL)
3245                 die("XCreateIC failed. Could not obtain input method.\n");
3246
3247         /* white cursor, black outline */
3248         cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3249         XDefineCursor(xw.dpy, xw.win, cursor);
3250         XRecolorCursor(xw.dpy, cursor,
3251                 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3252                 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3253
3254         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3255         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3256         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3257         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3258
3259         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3260         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3261                         PropModeReplace, (uchar *)&thispid, 1);
3262
3263         xresettitle();
3264         XMapWindow(xw.dpy, xw.win);
3265         xhints();
3266         XSync(xw.dpy, False);
3267 }
3268
3269 void
3270 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3271         int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3272             width = charlen * xw.cw, xp, i;
3273         int frcflags, charexists;
3274         int u8fl, u8fblen, u8cblen, doesexist;
3275         char *u8c, *u8fs;
3276         long unicodep;
3277         Font *font = &dc.font;
3278         FcResult fcres;
3279         FcPattern *fcpattern, *fontpattern;
3280         FcFontSet *fcsets[] = { NULL };
3281         FcCharSet *fccharset;
3282         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3283         XRenderColor colfg, colbg;
3284         XRectangle r;
3285         int oneatatime;
3286
3287         frcflags = FRC_NORMAL;
3288
3289         if(base.mode & ATTR_ITALIC) {
3290                 if(base.fg == defaultfg)
3291                         base.fg = defaultitalic;
3292                 font = &dc.ifont;
3293                 frcflags = FRC_ITALIC;
3294         } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3295                 if(base.fg == defaultfg)
3296                         base.fg = defaultitalic;
3297                 font = &dc.ibfont;
3298                 frcflags = FRC_ITALICBOLD;
3299         } else if(base.mode & ATTR_UNDERLINE) {
3300                 if(base.fg == defaultfg)
3301                         base.fg = defaultunderline;
3302         }
3303
3304         if(IS_TRUECOL(base.fg)) {
3305                 colfg.alpha = 0xffff;
3306                 colfg.red = TRUERED(base.fg);
3307                 colfg.green = TRUEGREEN(base.fg);
3308                 colfg.blue = TRUEBLUE(base.fg);
3309                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3310                 fg = &truefg;
3311         } else {
3312                 fg = &dc.col[base.fg];
3313         }
3314
3315         if(IS_TRUECOL(base.bg)) {
3316                 colbg.alpha = 0xffff;
3317                 colbg.green = TRUEGREEN(base.bg);
3318                 colbg.red = TRUERED(base.bg);
3319                 colbg.blue = TRUEBLUE(base.bg);
3320                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3321                 bg = &truebg;
3322         } else {
3323                 bg = &dc.col[base.bg];
3324         }
3325
3326         if(base.mode & ATTR_BOLD) {
3327                 /*
3328                  * change basic system colors [0-7]
3329                  * to bright system colors [8-15]
3330                  */
3331                 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3332                         fg = &dc.col[base.fg + 8];
3333
3334                 if(base.mode & ATTR_ITALIC) {
3335                         font = &dc.ibfont;
3336                         frcflags = FRC_ITALICBOLD;
3337                 } else {
3338                         font = &dc.bfont;
3339                         frcflags = FRC_BOLD;
3340                 }
3341         }
3342
3343         if(IS_SET(MODE_REVERSE)) {
3344                 if(fg == &dc.col[defaultfg]) {
3345                         fg = &dc.col[defaultbg];
3346                 } else {
3347                         colfg.red = ~fg->color.red;
3348                         colfg.green = ~fg->color.green;
3349                         colfg.blue = ~fg->color.blue;
3350                         colfg.alpha = fg->color.alpha;
3351                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3352                                         &revfg);
3353                         fg = &revfg;
3354                 }
3355
3356                 if(bg == &dc.col[defaultbg]) {
3357                         bg = &dc.col[defaultfg];
3358                 } else {
3359                         colbg.red = ~bg->color.red;
3360                         colbg.green = ~bg->color.green;
3361                         colbg.blue = ~bg->color.blue;
3362                         colbg.alpha = bg->color.alpha;
3363                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3364                                         &revbg);
3365                         bg = &revbg;
3366                 }
3367         }
3368
3369         if(base.mode & ATTR_REVERSE) {
3370                 temp = fg;
3371                 fg = bg;
3372                 bg = temp;
3373         }
3374
3375         if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3376                 colfg.red = fg->color.red / 2;
3377                 colfg.green = fg->color.green / 2;
3378                 colfg.blue = fg->color.blue / 2;
3379                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3380                 fg = &revfg;
3381         }
3382
3383         if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3384                 fg = bg;
3385
3386         if(base.mode & ATTR_INVISIBLE)
3387                 fg = bg;
3388
3389         /* Intelligent cleaning up of the borders. */
3390         if(x == 0) {
3391                 xclear(0, (y == 0)? 0 : winy, borderpx,
3392                         winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3393         }
3394         if(x + charlen >= term.col) {
3395                 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3396                         ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3397         }
3398         if(y == 0)
3399                 xclear(winx, 0, winx + width, borderpx);
3400         if(y == term.row-1)
3401                 xclear(winx, winy + xw.ch, winx + width, xw.h);
3402
3403         /* Clean up the region we want to draw to. */
3404         XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3405
3406         /* Set the clip region because Xft is sometimes dirty. */
3407         r.x = 0;
3408         r.y = 0;
3409         r.height = xw.ch;
3410         r.width = width;
3411         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3412
3413         for(xp = winx; bytelen > 0;) {
3414                 /*
3415                  * Search for the range in the to be printed string of glyphs
3416                  * that are in the main font. Then print that range. If
3417                  * some glyph is found that is not in the font, do the
3418                  * fallback dance.
3419                  */
3420                 u8fs = s;
3421                 u8fblen = 0;
3422                 u8fl = 0;
3423                 oneatatime = font->width != xw.cw;
3424                 for(;;) {
3425                         u8c = s;
3426                         u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3427                         s += u8cblen;
3428                         bytelen -= u8cblen;
3429
3430                         doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3431                         if(doesexist) {
3432                                         u8fl++;
3433                                         u8fblen += u8cblen;
3434                                         if(!oneatatime && bytelen > 0)
3435                                                         continue;
3436                         }
3437
3438                         if(u8fl > 0) {
3439                                 XftDrawStringUtf8(xw.draw, fg,
3440                                                 font->match, xp,
3441                                                 winy + font->ascent,
3442                                                 (FcChar8 *)u8fs,
3443                                                 u8fblen);
3444                                 xp += xw.cw * u8fl;
3445                         }
3446                         break;
3447                 }
3448                 if(doesexist) {
3449                         if(oneatatime)
3450                                 continue;
3451                         break;
3452                 }
3453
3454                 /* Search the font cache. */
3455                 for(i = 0; i < frclen; i++) {
3456                         charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3457                         /* Everything correct. */
3458                         if(charexists && frc[i].flags == frcflags)
3459                                 break;
3460                         /* We got a default font for a not found glyph. */
3461                         if(!charexists && frc[i].flags == frcflags \
3462                                         && frc[i].unicodep == unicodep) {
3463                                 break;
3464                         }
3465                 }
3466
3467                 /* Nothing was found. */
3468                 if(i >= frclen) {
3469                         if(!font->set)
3470                                 font->set = FcFontSort(0, font->pattern,
3471                                                        FcTrue, 0, &fcres);
3472                         fcsets[0] = font->set;
3473
3474                         /*
3475                          * Nothing was found in the cache. Now use
3476                          * some dozen of Fontconfig calls to get the
3477                          * font for one single character.
3478                          *
3479                          * Xft and fontconfig are design failures.
3480                          */
3481                         fcpattern = FcPatternDuplicate(font->pattern);
3482                         fccharset = FcCharSetCreate();
3483
3484                         FcCharSetAddChar(fccharset, unicodep);
3485                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
3486                                         fccharset);
3487                         FcPatternAddBool(fcpattern, FC_SCALABLE,
3488                                         FcTrue);
3489
3490                         FcConfigSubstitute(0, fcpattern,
3491                                         FcMatchPattern);
3492                         FcDefaultSubstitute(fcpattern);
3493
3494                         fontpattern = FcFontSetMatch(0, fcsets, 1,
3495                                         fcpattern, &fcres);
3496
3497                         /*
3498                          * Overwrite or create the new cache entry.
3499                          */
3500                         if(frclen >= LEN(frc)) {
3501                                 frclen = LEN(frc) - 1;
3502                                 XftFontClose(xw.dpy, frc[frclen].font);
3503                                 frc[frclen].unicodep = 0;
3504                         }
3505
3506                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
3507                                         fontpattern);
3508                         frc[frclen].flags = frcflags;
3509                         frc[frclen].unicodep = unicodep;
3510
3511                         i = frclen;
3512                         frclen++;
3513
3514                         FcPatternDestroy(fcpattern);
3515                         FcCharSetDestroy(fccharset);
3516                 }
3517
3518                 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3519                                 xp, winy + frc[i].font->ascent,
3520                                 (FcChar8 *)u8c, u8cblen);
3521
3522                 xp += xw.cw * wcwidth(unicodep);
3523         }
3524
3525         /*
3526          * This is how the loop above actually should be. Why does the
3527          * application have to care about font details?
3528          *
3529          * I have to repeat: Xft and Fontconfig are design failures.
3530          */
3531         /*
3532         XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3533                         winy + font->ascent, (FcChar8 *)s, bytelen);
3534         */
3535
3536         if(base.mode & ATTR_UNDERLINE) {
3537                 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3538                                 width, 1);
3539         }
3540
3541         if(base.mode & ATTR_STRUCK) {
3542                 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3543                                 width, 1);
3544         }
3545
3546         /* Reset clip to none. */
3547         XftDrawSetClip(xw.draw, 0);
3548 }
3549
3550 void
3551 xdrawglyph(Glyph g, int x, int y) {
3552         static char buf[UTF_SIZ];
3553         size_t len = utf8encode(g.u, buf);
3554         int width = g.mode & ATTR_WIDE ? 2 : 1;
3555
3556         xdraws(buf, g, x, y, width, len);
3557 }
3558
3559 void
3560 xdrawcursor(void) {
3561         static int oldx = 0, oldy = 0;
3562         int curx;
3563         Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs};
3564
3565         LIMIT(oldx, 0, term.col-1);
3566         LIMIT(oldy, 0, term.row-1);
3567
3568         curx = term.c.x;
3569
3570         /* adjust position if in dummy */
3571         if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3572                 oldx--;
3573         if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3574                 curx--;
3575
3576         g.u = term.line[term.c.y][term.c.x].u;
3577
3578         /* remove the old cursor */
3579         xdrawglyph(term.line[oldy][oldx], oldx, oldy);
3580
3581         if(IS_SET(MODE_HIDE))
3582                 return;
3583
3584         /* draw the new one */
3585         if(xw.state & WIN_FOCUSED) {
3586                 switch (xw.cursor) {
3587                         case 0: /* Blinking Block */
3588                         case 1: /* Blinking Block (Default) */
3589                         case 2: /* Steady Block */
3590                                 if(IS_SET(MODE_REVERSE)) {
3591                                                 g.mode |= ATTR_REVERSE;
3592                                                 g.fg = defaultcs;
3593                                                 g.bg = defaultfg;
3594                                         }
3595
3596                                 g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
3597                                 xdrawglyph(g, term.c.x, term.c.y);
3598                                 break;
3599                         case 3: /* Blinking Underline */
3600                         case 4: /* Steady Underline */
3601                                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3602                                                 borderpx + curx * xw.cw,
3603                                                 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3604                                                 xw.cw, cursorthickness);
3605                                 break;
3606                         case 5: /* Blinking bar */
3607                         case 6: /* Steady bar */
3608                                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3609                                                 borderpx + curx * xw.cw,
3610                                                 borderpx + term.c.y * xw.ch,
3611                                                 cursorthickness, xw.ch);
3612                                 break;
3613                 }
3614         } else {
3615                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3616                                 borderpx + curx * xw.cw,
3617                                 borderpx + term.c.y * xw.ch,
3618                                 xw.cw - 1, 1);
3619                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3620                                 borderpx + curx * xw.cw,
3621                                 borderpx + term.c.y * xw.ch,
3622                                 1, xw.ch - 1);
3623                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3624                                 borderpx + (curx + 1) * xw.cw - 1,
3625                                 borderpx + term.c.y * xw.ch,
3626                                 1, xw.ch - 1);
3627                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3628                                 borderpx + curx * xw.cw,
3629                                 borderpx + (term.c.y + 1) * xw.ch - 1,
3630                                 xw.cw, 1);
3631         }
3632         oldx = curx, oldy = term.c.y;
3633 }
3634
3635
3636 void
3637 xsettitle(char *p) {
3638         XTextProperty prop;
3639
3640         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3641                         &prop);
3642         XSetWMName(xw.dpy, xw.win, &prop);
3643         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3644         XFree(prop.value);
3645 }
3646
3647 void
3648 xresettitle(void) {
3649         xsettitle(opt_title ? opt_title : "st");
3650 }
3651
3652 void
3653 redraw(void) {
3654         tfulldirt();
3655         draw();
3656 }
3657
3658 void
3659 draw(void) {
3660         drawregion(0, 0, term.col, term.row);
3661         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3662                         xw.h, 0, 0);
3663         XSetForeground(xw.dpy, dc.gc,
3664                         dc.col[IS_SET(MODE_REVERSE)?
3665                                 defaultfg : defaultbg].pixel);
3666 }
3667
3668 void
3669 drawregion(int x1, int y1, int x2, int y2) {
3670         int ic, ib, x, y, ox;
3671         Glyph base, new;
3672         char buf[DRAW_BUF_SIZ];
3673         bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3674
3675         if(!(xw.state & WIN_VISIBLE))
3676                 return;
3677
3678         for(y = y1; y < y2; y++) {
3679                 if(!term.dirty[y])
3680                         continue;
3681
3682                 xtermclear(0, y, term.col, y);
3683                 term.dirty[y] = 0;
3684                 base = term.line[y][0];
3685                 ic = ib = ox = 0;
3686                 for(x = x1; x < x2; x++) {
3687                         new = term.line[y][x];
3688                         if(new.mode == ATTR_WDUMMY)
3689                                 continue;
3690                         if(ena_sel && selected(x, y))
3691                                 new.mode ^= ATTR_REVERSE;
3692                         if(ib > 0 && (ATTRCMP(base, new)
3693                                         || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3694                                 xdraws(buf, base, ox, y, ic, ib);
3695                                 ic = ib = 0;
3696                         }
3697                         if(ib == 0) {
3698                                 ox = x;
3699                                 base = new;
3700                         }
3701
3702                         ib += utf8encode(new.u, buf+ib);
3703                         ic += (new.mode & ATTR_WIDE)? 2 : 1;
3704                 }
3705                 if(ib > 0)
3706                         xdraws(buf, base, ox, y, ic, ib);
3707         }
3708         xdrawcursor();
3709 }
3710
3711 void
3712 expose(XEvent *ev) {
3713         redraw();
3714 }
3715
3716 void
3717 visibility(XEvent *ev) {
3718         XVisibilityEvent *e = &ev->xvisibility;
3719
3720         MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
3721 }
3722
3723 void
3724 unmap(XEvent *ev) {
3725         xw.state &= ~WIN_VISIBLE;
3726 }
3727
3728 void
3729 xsetpointermotion(int set) {
3730         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3731         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3732 }
3733
3734 void
3735 xseturgency(int add) {
3736         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3737
3738         MODBIT(h->flags, add, XUrgencyHint);
3739         XSetWMHints(xw.dpy, xw.win, h);
3740         XFree(h);
3741 }
3742
3743 void
3744 focus(XEvent *ev) {
3745         XFocusChangeEvent *e = &ev->xfocus;
3746
3747         if(e->mode == NotifyGrab)
3748                 return;
3749
3750         if(ev->type == FocusIn) {
3751                 XSetICFocus(xw.xic);
3752                 xw.state |= WIN_FOCUSED;
3753                 xseturgency(0);
3754                 if(IS_SET(MODE_FOCUS))
3755                         ttywrite("\033[I", 3);
3756         } else {
3757                 XUnsetICFocus(xw.xic);
3758                 xw.state &= ~WIN_FOCUSED;
3759                 if(IS_SET(MODE_FOCUS))
3760                         ttywrite("\033[O", 3);
3761         }
3762 }
3763
3764 bool
3765 match(uint mask, uint state) {
3766         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3767 }
3768
3769 void
3770 numlock(const Arg *dummy) {
3771         term.numlock ^= 1;
3772 }
3773
3774 char*
3775 kmap(KeySym k, uint state) {
3776         Key *kp;
3777         int i;
3778
3779         /* Check for mapped keys out of X11 function keys. */
3780         for(i = 0; i < LEN(mappedkeys); i++) {
3781                 if(mappedkeys[i] == k)
3782                         break;
3783         }
3784         if(i == LEN(mappedkeys)) {
3785                 if((k & 0xFFFF) < 0xFD00)
3786                         return NULL;
3787         }
3788
3789         for(kp = key; kp < key + LEN(key); kp++) {
3790                 if(kp->k != k)
3791                         continue;
3792
3793                 if(!match(kp->mask, state))
3794                         continue;
3795
3796                 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3797                         continue;
3798                 if(term.numlock && kp->appkey == 2)
3799                         continue;
3800
3801                 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3802                         continue;
3803
3804                 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3805                         continue;
3806
3807                 return kp->s;
3808         }
3809
3810         return NULL;
3811 }
3812
3813 void
3814 kpress(XEvent *ev) {
3815         XKeyEvent *e = &ev->xkey;
3816         KeySym ksym;
3817         char buf[32], *customkey;
3818         int len;
3819         long c;
3820         Status status;
3821         Shortcut *bp;
3822
3823         if(IS_SET(MODE_KBDLOCK))
3824                 return;
3825
3826         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3827         /* 1. shortcuts */
3828         for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3829                 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3830                         bp->func(&(bp->arg));
3831                         return;
3832                 }
3833         }
3834
3835         /* 2. custom keys from config.h */
3836         if((customkey = kmap(ksym, e->state))) {
3837                 ttysend(customkey, strlen(customkey));
3838                 return;
3839         }
3840
3841         /* 3. composed string from input method */
3842         if(len == 0)
3843                 return;
3844         if(len == 1 && e->state & Mod1Mask) {
3845                 if(IS_SET(MODE_8BIT)) {
3846                         if(*buf < 0177) {
3847                                 c = *buf | 0x80;
3848                                 len = utf8encode(c, buf);
3849                         }
3850                 } else {
3851                         buf[1] = buf[0];
3852                         buf[0] = '\033';
3853                         len = 2;
3854                 }
3855         }
3856         ttysend(buf, len);
3857 }
3858
3859
3860 void
3861 cmessage(XEvent *e) {
3862         /*
3863          * See xembed specs
3864          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3865          */
3866         if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3867                 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3868                         xw.state |= WIN_FOCUSED;
3869                         xseturgency(0);
3870                 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3871                         xw.state &= ~WIN_FOCUSED;
3872                 }
3873         } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3874                 /* Send SIGHUP to shell */
3875                 kill(pid, SIGHUP);
3876                 exit(EXIT_SUCCESS);
3877         }
3878 }
3879
3880 void
3881 cresize(int width, int height) {
3882         int col, row;
3883
3884         if(width != 0)
3885                 xw.w = width;
3886         if(height != 0)
3887                 xw.h = height;
3888
3889         col = (xw.w - 2 * borderpx) / xw.cw;
3890         row = (xw.h - 2 * borderpx) / xw.ch;
3891
3892         tresize(col, row);
3893         xresize(col, row);
3894         ttyresize();
3895 }
3896
3897 void
3898 resize(XEvent *e) {
3899         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3900                 return;
3901
3902         cresize(e->xconfigure.width, e->xconfigure.height);
3903 }
3904
3905 void
3906 run(void) {
3907         XEvent ev;
3908         int w = xw.w, h = xw.h;
3909         fd_set rfd;
3910         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3911         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3912         long deltatime;
3913
3914         /* Waiting for window mapping */
3915         do {
3916                 XNextEvent(xw.dpy, &ev);
3917                 if(ev.type == ConfigureNotify) {
3918                         w = ev.xconfigure.width;
3919                         h = ev.xconfigure.height;
3920                 }
3921         } while(ev.type != MapNotify);
3922
3923         ttynew();
3924         cresize(w, h);
3925
3926         clock_gettime(CLOCK_MONOTONIC, &last);
3927         lastblink = last;
3928
3929         for(xev = actionfps;;) {
3930                 FD_ZERO(&rfd);
3931                 FD_SET(cmdfd, &rfd);
3932                 FD_SET(xfd, &rfd);
3933
3934                 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3935                         if(errno == EINTR)
3936                                 continue;
3937                         die("select failed: %s\n", strerror(errno));
3938                 }
3939                 if(FD_ISSET(cmdfd, &rfd)) {
3940                         ttyread();
3941                         if(blinktimeout) {
3942                                 blinkset = tattrset(ATTR_BLINK);
3943                                 if(!blinkset)
3944                                         MODBIT(term.mode, 0, MODE_BLINK);
3945                         }
3946                 }
3947
3948                 if(FD_ISSET(xfd, &rfd))
3949                         xev = actionfps;
3950
3951                 clock_gettime(CLOCK_MONOTONIC, &now);
3952                 drawtimeout.tv_sec = 0;
3953                 drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
3954                 tv = &drawtimeout;
3955
3956                 dodraw = 0;
3957                 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3958                         tsetdirtattr(ATTR_BLINK);
3959                         term.mode ^= MODE_BLINK;
3960                         lastblink = now;
3961                         dodraw = 1;
3962                 }
3963                 deltatime = TIMEDIFF(now, last);
3964                 if(deltatime > 1000 / (xev ? xfps : actionfps)) {
3965                         dodraw = 1;
3966                         last = now;
3967                 }
3968
3969                 if(dodraw) {
3970                         while(XPending(xw.dpy)) {
3971                                 XNextEvent(xw.dpy, &ev);
3972                                 if(XFilterEvent(&ev, None))
3973                                         continue;
3974                                 if(handler[ev.type])
3975                                         (handler[ev.type])(&ev);
3976                         }
3977
3978                         draw();
3979                         XFlush(xw.dpy);
3980
3981                         if(xev && !FD_ISSET(xfd, &rfd))
3982                                 xev--;
3983                         if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3984                                 if(blinkset) {
3985                                         if(TIMEDIFF(now, lastblink) \
3986                                                         > blinktimeout) {
3987                                                 drawtimeout.tv_nsec = 1000;
3988                                         } else {
3989                                                 drawtimeout.tv_nsec = (1E6 * \
3990                                                         (blinktimeout - \
3991                                                         TIMEDIFF(now,
3992                                                                 lastblink)));
3993                                         }
3994                                         drawtimeout.tv_sec = \
3995                                             drawtimeout.tv_nsec / 1E9;
3996                                         drawtimeout.tv_nsec %= (long)1E9;
3997                                 } else {
3998                                         tv = NULL;
3999                                 }
4000                         }
4001                 }
4002         }
4003 }
4004
4005 void
4006 usage(void) {
4007         die("%s " VERSION " (c) 2010-2015 st engineers\n"
4008         "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4009         "          [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
4010         "       st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4011         "          [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
4012         argv0);
4013 }
4014
4015 int
4016 main(int argc, char *argv[]) {
4017         uint cols = 80, rows = 24;
4018
4019         xw.l = xw.t = 0;
4020         xw.isfixed = False;
4021         xw.cursor = 0;
4022
4023         ARGBEGIN {
4024         case 'a':
4025                 allowaltscreen = false;
4026                 break;
4027         case 'c':
4028                 opt_class = EARGF(usage());
4029                 break;
4030         case 'e':
4031                 if(argc > 1)
4032                         --argc, ++argv;
4033                 goto run;
4034         case 'f':
4035                 opt_font = EARGF(usage());
4036                 break;
4037         case 'g':
4038                 xw.gm = XParseGeometry(EARGF(usage()),
4039                                 &xw.l, &xw.t, &cols, &rows);
4040                 break;
4041         case 'i':
4042                 xw.isfixed = True;
4043                 break;
4044         case 'o':
4045                 opt_io = EARGF(usage());
4046                 break;
4047         case 'l':
4048                 opt_line = EARGF(usage());
4049                 break;
4050         case 't':
4051                 opt_title = EARGF(usage());
4052                 break;
4053         case 'w':
4054                 opt_embed = EARGF(usage());
4055                 break;
4056         case 'v':
4057         default:
4058                 usage();
4059         } ARGEND;
4060
4061 run:
4062         if(argc > 0) {
4063                 /* eat all remaining arguments */
4064                 opt_cmd = argv;
4065                 if(!opt_title && !opt_line)
4066                         opt_title = basename(xstrdup(argv[0]));
4067         }
4068         setlocale(LC_CTYPE, "");
4069         XSetLocaleModifiers("");
4070         tnew(MAX(cols, 1), MAX(rows, 1));
4071         xinit();
4072         selinit();
4073         run();
4074
4075         return 0;
4076 }
4077