st.c

   1 /* See LICENSE for licence details. */
   2 #include <ctype.h>
   3 #include <errno.h>
   4 #include <fcntl.h>
   5 #include <limits.h>
   6 #include <locale.h>
   7 #include <pwd.h>
   8 #include <stdarg.h>
   9 #include <stdbool.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <signal.h>
  14 #include <stdint.h>
  15 #include <sys/ioctl.h>
  16 #include <sys/select.h>
  17 #include <sys/stat.h>
  18 #include <sys/time.h>
  19 #include <sys/types.h>
  20 #include <sys/wait.h>
  21 #include <time.h>
  22 #include <unistd.h>
  23 #include <libgen.h>
  24 #include <X11/Xatom.h>
  25 #include <X11/Xlib.h>
  26 #include <X11/Xutil.h>
  27 #include <X11/cursorfont.h>
  28 #include <X11/keysym.h>
  29 #include <X11/Xft/Xft.h>
  30 #include <X11/XKBlib.h>
  31 #include <fontconfig/fontconfig.h>
  32 #include <wchar.h>
  33
  34 #include "arg.h"
  35
  36 char *argv0;
  37
  38 #define Glyph Glyph_
  39 #define Font Font_
  40
  41 #if   defined(__linux)
  42  #include <pty.h>
  43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  44  #include <util.h>
  45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
  46  #include <libutil.h>
  47 #endif
  48
  49
  50 /* XEMBED messages */
  51 #define XEMBED_FOCUS_IN  4
  52 #define XEMBED_FOCUS_OUT 5
  53
  54 /* Arbitrary sizes */
  55 #define UTF_INVALID   0xFFFD
  56 #define UTF_SIZ       4
  57 #define ESC_BUF_SIZ   (128*UTF_SIZ)
  58 #define ESC_ARG_SIZ   16
  59 #define STR_BUF_SIZ   ESC_BUF_SIZ
  60 #define STR_ARG_SIZ   ESC_ARG_SIZ
  61 #define DRAW_BUF_SIZ  20*1024
  62 #define XK_ANY_MOD    UINT_MAX
  63 #define XK_NO_MOD     0
  64 #define XK_SWITCH_MOD (1<<13)
  65
  66 /* macros */
  67 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
  68 #define MAX(a, b)  ((a) < (b) ? (b) : (a))
  69 #define LEN(a)     (sizeof(a) / sizeof(a)[0])
  70 #define DEFAULT(a, b)     (a) = (a) ? (a) : (b)
  71 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
  72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
  73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
  74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
  75 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
  78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
  79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
  80
  81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
  82 #define IS_TRUECOL(x)    (1 << 24 & (x))
  83 #define TRUERED(x)       (((x) & 0xff0000) >> 8)
  84 #define TRUEGREEN(x)     (((x) & 0xff00))
  85 #define TRUEBLUE(x)      (((x) & 0xff) << 8)
  86
  87
  88 enum glyph_attribute {
  89         ATTR_NULL      = 0,
  90         ATTR_BOLD      = 1 << 0,
  91         ATTR_FAINT     = 1 << 1,
  92         ATTR_ITALIC    = 1 << 2,
  93         ATTR_UNDERLINE = 1 << 3,
  94         ATTR_BLINK     = 1 << 4,
  95         ATTR_REVERSE   = 1 << 5,
  96         ATTR_INVISIBLE = 1 << 6,
  97         ATTR_STRUCK    = 1 << 7,
  98         ATTR_WRAP      = 1 << 8,
  99         ATTR_WIDE      = 1 << 9,
 100         ATTR_WDUMMY    = 1 << 10,
 101 };
 102
 103 enum cursor_movement {
 104         CURSOR_SAVE,
 105         CURSOR_LOAD
 106 };
 107
 108 enum cursor_state {
 109         CURSOR_DEFAULT  = 0,
 110         CURSOR_WRAPNEXT = 1,
 111         CURSOR_ORIGIN   = 2
 112 };
 113
 114 enum term_mode {
 115         MODE_WRAP        = 1 << 0,
 116         MODE_INSERT      = 1 << 1,
 117         MODE_APPKEYPAD   = 1 << 2,
 118         MODE_ALTSCREEN   = 1 << 3,
 119         MODE_CRLF        = 1 << 4,
 120         MODE_MOUSEBTN    = 1 << 5,
 121         MODE_MOUSEMOTION = 1 << 6,
 122         MODE_REVERSE     = 1 << 7,
 123         MODE_KBDLOCK     = 1 << 8,
 124         MODE_HIDE        = 1 << 9,
 125         MODE_ECHO        = 1 << 10,
 126         MODE_APPCURSOR   = 1 << 11,
 127         MODE_MOUSESGR    = 1 << 12,
 128         MODE_8BIT        = 1 << 13,
 129         MODE_BLINK       = 1 << 14,
 130         MODE_FBLINK      = 1 << 15,
 131         MODE_FOCUS       = 1 << 16,
 132         MODE_MOUSEX10    = 1 << 17,
 133         MODE_MOUSEMANY   = 1 << 18,
 134         MODE_BRCKTPASTE  = 1 << 19,
 135         MODE_PRINT       = 1 << 20,
 136         MODE_MOUSE       = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
 137                           |MODE_MOUSEMANY,
 138 };
 139
 140 enum charset {
 141         CS_GRAPHIC0,
 142         CS_GRAPHIC1,
 143         CS_UK,
 144         CS_USA,
 145         CS_MULTI,
 146         CS_GER,
 147         CS_FIN
 148 };
 149
 150 enum escape_state {
 151         ESC_START      = 1,
 152         ESC_CSI        = 2,
 153         ESC_STR        = 4,  /* DCS, OSC, PM, APC */
 154         ESC_ALTCHARSET = 8,
 155         ESC_STR_END    = 16, /* a final string was encountered */
 156         ESC_TEST       = 32, /* Enter in test mode */
 157 };
 158
 159 enum window_state {
 160         WIN_VISIBLE = 1,
 161         WIN_REDRAW  = 2,
 162         WIN_FOCUSED = 4
 163 };
 164
 165 enum selection_type {
 166         SEL_REGULAR = 1,
 167         SEL_RECTANGULAR = 2
 168 };
 169
 170 enum selection_snap {
 171         SNAP_WORD = 1,
 172         SNAP_LINE = 2
 173 };
 174
 175 typedef unsigned char uchar;
 176 typedef unsigned int uint;
 177 typedef unsigned long ulong;
 178 typedef unsigned short ushort;
 179
 180 typedef XftDraw *Draw;
 181 typedef XftColor Color;
 182
 183 typedef struct {
 184         char c[UTF_SIZ]; /* character code */
 185         ushort mode;      /* attribute flags */
 186         uint32_t fg;      /* foreground  */
 187         uint32_t bg;      /* background  */
 188 } Glyph;
 189
 190 typedef Glyph *Line;
 191
 192 typedef struct {
 193         Glyph attr; /* current char attributes */
 194         int x;
 195         int y;
 196         char state;
 197 } TCursor;
 198
 199 /* CSI Escape sequence structs */
 200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
 201 typedef struct {
 202         char buf[ESC_BUF_SIZ]; /* raw string */
 203         int len;               /* raw string length */
 204         char priv;
 205         int arg[ESC_ARG_SIZ];
 206         int narg;              /* nb of args */
 207         char mode;
 208 } CSIEscape;
 209
 210 /* STR Escape sequence structs */
 211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
 212 typedef struct {
 213         char type;             /* ESC type ... */
 214         char buf[STR_BUF_SIZ]; /* raw string */
 215         int len;               /* raw string length */
 216         char *args[STR_ARG_SIZ];
 217         int narg;              /* nb of args */
 218 } STREscape;
 219
 220 /* Internal representation of the screen */
 221 typedef struct {
 222         int row;      /* nb row */
 223         int col;      /* nb col */
 224         Line *line;   /* screen */
 225         Line *alt;    /* alternate screen */
 226         bool *dirty;  /* dirtyness of lines */
 227         TCursor c;    /* cursor */
 228         int top;      /* top    scroll limit */
 229         int bot;      /* bottom scroll limit */
 230         int mode;     /* terminal mode flags */
 231         int esc;      /* escape state flags */
 232         char trantbl[4]; /* charset table translation */
 233         int charset;  /* current charset */
 234         int icharset; /* selected charset for sequence */
 235         bool numlock; /* lock numbers in keyboard */
 236         bool *tabs;
 237 } Term;
 238
 239 /* Purely graphic info */
 240 typedef struct {
 241         Display *dpy;
 242         Colormap cmap;
 243         Window win;
 244         Drawable buf;
 245         Atom xembed, wmdeletewin, netwmname, netwmpid;
 246         XIM xim;
 247         XIC xic;
 248         Draw draw;
 249         Visual *vis;
 250         XSetWindowAttributes attrs;
 251         int scr;
 252         bool isfixed; /* is fixed geometry? */
 253         int l, t; /* left and top offset */
 254         int gm; /* geometry mask */
 255         int tw, th; /* tty width and height */
 256         int w, h; /* window width and height */
 257         int ch; /* char height */
 258         int cw; /* char width  */
 259         char state; /* focus, redraw, visible */
 260 } XWindow;
 261
 262 typedef struct {
 263         uint b;
 264         uint mask;
 265         char *s;
 266 } Mousekey;
 267
 268 typedef struct {
 269         KeySym k;
 270         uint mask;
 271         char *s;
 272         /* three valued logic variables: 0 indifferent, 1 on, -1 off */
 273         signed char appkey;    /* application keypad */
 274         signed char appcursor; /* application cursor */
 275         signed char crlf;      /* crlf mode          */
 276 } Key;
 277
 278 typedef struct {
 279         int mode;
 280         int type;
 281         int snap;
 282         /*
 283          * Selection variables:
 284          * nb – normalized coordinates of the beginning of the selection
 285          * ne – normalized coordinates of the end of the selection
 286          * ob – original coordinates of the beginning of the selection
 287          * oe – original coordinates of the end of the selection
 288          */
 289         struct {
 290                 int x, y;
 291         } nb, ne, ob, oe;
 292
 293         char *primary, *clipboard;
 294         Atom xtarget;
 295         bool alt;
 296         struct timespec tclick1;
 297         struct timespec tclick2;
 298 } Selection;
 299
 300 typedef union {
 301         int i;
 302         uint ui;
 303         float f;
 304         const void *v;
 305 } Arg;
 306
 307 typedef struct {
 308         uint mod;
 309         KeySym keysym;
 310         void (*func)(const Arg *);
 311         const Arg arg;
 312 } Shortcut;
 313
 314 /* function definitions used in config.h */
 315 static void clipcopy(const Arg *);
 316 static void clippaste(const Arg *);
 317 static void numlock(const Arg *);
 318 static void selpaste(const Arg *);
 319 static void xzoom(const Arg *);
 320 static void xzoomabs(const Arg *);
 321 static void xzoomreset(const Arg *);
 322 static void printsel(const Arg *);
 323 static void printscreen(const Arg *) ;
 324 static void toggleprinter(const Arg *);
 325
 326 /* Config.h for applying patches and the configuration. */
 327 #include "config.h"
 328
 329 /* Font structure */
 330 typedef struct {
 331         int height;
 332         int width;
 333         int ascent;
 334         int descent;
 335         short lbearing;
 336         short rbearing;
 337         XftFont *match;
 338         FcFontSet *set;
 339         FcPattern *pattern;
 340 } Font;
 341
 342 /* Drawing Context */
 343 typedef struct {
 344         Color col[MAX(LEN(colorname), 256)];
 345         Font font, bfont, ifont, ibfont;
 346         GC gc;
 347 } DC;
 348
 349 static void die(const char *, ...);
 350 static void draw(void);
 351 static void redraw(void);
 352 static void drawregion(int, int, int, int);
 353 static void execsh(void);
 354 static void sigchld(int);
 355 static void run(void);
 356
 357 static void csidump(void);
 358 static void csihandle(void);
 359 static void csiparse(void);
 360 static void csireset(void);
 361 static int eschandle(uchar ascii);
 362 static void strdump(void);
 363 static void strhandle(void);
 364 static void strparse(void);
 365 static void strreset(void);
 366
 367 static int tattrset(int);
 368 static void tprinter(char *, size_t);
 369 static void tdumpsel(void);
 370 static void tdumpline(int);
 371 static void tdump(void);
 372 static void tclearregion(int, int, int, int);
 373 static void tcursor(int);
 374 static void tdeletechar(int);
 375 static void tdeleteline(int);
 376 static void tinsertblank(int);
 377 static void tinsertblankline(int);
 378 static int tlinelen(int);
 379 static void tmoveto(int, int);
 380 static void tmoveato(int, int);
 381 static void tnew(int, int);
 382 static void tnewline(int);
 383 static void tputtab(int);
 384 static void tputc(char *, int);
 385 static void treset(void);
 386 static void tresize(int, int);
 387 static void tscrollup(int, int);
 388 static void tscrolldown(int, int);
 389 static void tsetattr(int *, int);
 390 static void tsetchar(char *, Glyph *, int, int);
 391 static void tsetscroll(int, int);
 392 static void tswapscreen(void);
 393 static void tsetdirt(int, int);
 394 static void tsetdirtattr(int);
 395 static void tsetmode(bool, bool, int *, int);
 396 static void tfulldirt(void);
 397 static void techo(char *, int);
 398 static void tcontrolcode(uchar );
 399 static void tdectest(char );
 400 static int32_t tdefcolor(int *, int *, int);
 401 static void tdeftran(char);
 402 static inline bool match(uint, uint);
 403 static void ttynew(void);
 404 static void ttyread(void);
 405 static void ttyresize(void);
 406 static void ttysend(char *, size_t);
 407 static void ttywrite(const char *, size_t);
 408 static void tstrsequence(uchar c);
 409
 410 static void xdraws(char *, Glyph, int, int, int, int);
 411 static void xhints(void);
 412 static void xclear(int, int, int, int);
 413 static void xdrawcursor(void);
 414 static void xinit(void);
 415 static void xloadcols(void);
 416 static int xsetcolorname(int, const char *);
 417 static int xgeommasktogravity(int);
 418 static int xloadfont(Font *, FcPattern *);
 419 static void xloadfonts(char *, double);
 420 static int xloadfontset(Font *);
 421 static void xsettitle(char *);
 422 static void xresettitle(void);
 423 static void xsetpointermotion(int);
 424 static void xseturgency(int);
 425 static void xsetsel(char *);
 426 static void xtermclear(int, int, int, int);
 427 static void xunloadfont(Font *);
 428 static void xunloadfonts(void);
 429 static void xresize(int, int);
 430
 431 static void expose(XEvent *);
 432 static void visibility(XEvent *);
 433 static void unmap(XEvent *);
 434 static char *kmap(KeySym, uint);
 435 static void kpress(XEvent *);
 436 static void cmessage(XEvent *);
 437 static void cresize(int, int);
 438 static void resize(XEvent *);
 439 static void focus(XEvent *);
 440 static void brelease(XEvent *);
 441 static void bpress(XEvent *);
 442 static void bmotion(XEvent *);
 443 static void selnotify(XEvent *);
 444 static void selclear(XEvent *);
 445 static void selrequest(XEvent *);
 446
 447 static void selinit(void);
 448 static void selnormalize(void);
 449 static inline bool selected(int, int);
 450 static char *getsel(void);
 451 static void selcopy(void);
 452 static void selscroll(int, int);
 453 static void selsnap(int, int *, int *, int);
 454 static void getbuttoninfo(XEvent *);
 455 static void mousereport(XEvent *);
 456
 457 static size_t utf8decode(char *, long *, size_t);
 458 static long utf8decodebyte(char, size_t *);
 459 static size_t utf8encode(long, char *, size_t);
 460 static char utf8encodebyte(long, size_t);
 461 static size_t utf8len(char *);
 462 static size_t utf8validate(long *, size_t);
 463
 464 static ssize_t xwrite(int, const char *, size_t);
 465 static void *xmalloc(size_t);
 466 static void *xrealloc(void *, size_t);
 467 static char *xstrdup(char *);
 468
 469 static void usage(void);
 470
 471 static void (*handler[LASTEvent])(XEvent *) = {
 472         [KeyPress] = kpress,
 473         [ClientMessage] = cmessage,
 474         [ConfigureNotify] = resize,
 475         [VisibilityNotify] = visibility,
 476         [UnmapNotify] = unmap,
 477         [Expose] = expose,
 478         [FocusIn] = focus,
 479         [FocusOut] = focus,
 480         [MotionNotify] = bmotion,
 481         [ButtonPress] = bpress,
 482         [ButtonRelease] = brelease,
 483 /*
 484  * Uncomment if you want the selection to disappear when you select something
 485  * different in another window.
 486  */
 487 /*      [SelectionClear] = selclear, */
 488         [SelectionNotify] = selnotify,
 489         [SelectionRequest] = selrequest,
 490 };
 491
 492 /* Globals */
 493 static DC dc;
 494 static XWindow xw;
 495 static Term term;
 496 static CSIEscape csiescseq;
 497 static STREscape strescseq;
 498 static int cmdfd;
 499 static pid_t pid;
 500 static Selection sel;
 501 static int iofd = STDOUT_FILENO;
 502 static char **opt_cmd = NULL;
 503 static char *opt_io = NULL;
 504 static char *opt_title = NULL;
 505 static char *opt_embed = NULL;
 506 static char *opt_class = NULL;
 507 static char *opt_font = NULL;
 508 static int oldbutton = 3; /* button event on startup: 3 = release */
 509
 510 static char *usedfont = NULL;
 511 static double usedfontsize = 0;
 512 static double defaultfontsize = 0;
 513
 514 static uchar utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
 515 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
 516 static long utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
 517 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
 518
 519 /* Font Ring Cache */
 520 enum {
 521         FRC_NORMAL,
 522         FRC_ITALIC,
 523         FRC_BOLD,
 524         FRC_ITALICBOLD
 525 };
 526
 527 typedef struct {
 528         XftFont *font;
 529         int flags;
 530         long unicodep;
 531 } Fontcache;
 532
 533 /* Fontcache is an array now. A new font will be appended to the array. */
 534 static Fontcache frc[16];
 535 static int frclen = 0;
 536
 537 ssize_t
 538 xwrite(int fd, const char *s, size_t len) {
 539         size_t aux = len;
 540
 541         while(len > 0) {
 542                 ssize_t r = write(fd, s, len);
 543                 if(r < 0)
 544                         return r;
 545                 len -= r;
 546                 s += r;
 547         }
 548         return aux;
 549 }
 550
 551 void *
 552 xmalloc(size_t len) {
 553         void *p = malloc(len);
 554
 555         if(!p)
 556                 die("Out of memory\n");
 557
 558         return p;
 559 }
 560
 561 void *
 562 xrealloc(void *p, size_t len) {
 563         if((p = realloc(p, len)) == NULL)
 564                 die("Out of memory\n");
 565
 566         return p;
 567 }
 568
 569 char *
 570 xstrdup(char *s) {
 571         if((s = strdup(s)) == NULL)
 572                 die("Out of memory\n");
 573
 574         return s;
 575 }
 576
 577 size_t
 578 utf8decode(char *c, long *u, size_t clen) {
 579         size_t i, j, len, type;
 580         long udecoded;
 581
 582         *u = UTF_INVALID;
 583         if(!clen)
 584                 return 0;
 585         udecoded = utf8decodebyte(c[0], &len);
 586         if(!BETWEEN(len, 1, UTF_SIZ))
 587                 return 1;
 588         for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
 589                 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
 590                 if(type != 0)
 591                         return j;
 592         }
 593         if(j < len)
 594                 return 0;
 595         *u = udecoded;
 596         utf8validate(u, len);
 597         return len;
 598 }
 599
 600 long
 601 utf8decodebyte(char c, size_t *i) {
 602         for(*i = 0; *i < LEN(utfmask); ++(*i))
 603                 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
 604                         return (uchar)c & ~utfmask[*i];
 605         return 0;
 606 }
 607
 608 size_t
 609 utf8encode(long u, char *c, size_t clen) {
 610         size_t len, i;
 611
 612         len = utf8validate(&u, 0);
 613         if(clen < len)
 614                 return 0;
 615         for(i = len - 1; i != 0; --i) {
 616                 c[i] = utf8encodebyte(u, 0);
 617                 u >>= 6;
 618         }
 619         c[0] = utf8encodebyte(u, len);
 620         return len;
 621 }
 622
 623 char
 624 utf8encodebyte(long u, size_t i) {
 625         return utfbyte[i] | (u & ~utfmask[i]);
 626 }
 627
 628 size_t
 629 utf8len(char *c) {
 630         return utf8decode(c, &(long){0}, UTF_SIZ);
 631 }
 632
 633 size_t
 634 utf8validate(long *u, size_t i) {
 635         if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
 636                 *u = UTF_INVALID;
 637         for(i = 1; *u > utfmax[i]; ++i)
 638                 ;
 639         return i;
 640 }
 641
 642 static void
 643 selinit(void) {
 644         memset(&sel.tclick1, 0, sizeof(sel.tclick1));
 645         memset(&sel.tclick2, 0, sizeof(sel.tclick2));
 646         sel.mode = 0;
 647         sel.ob.x = -1;
 648         sel.primary = NULL;
 649         sel.clipboard = NULL;
 650         sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
 651         if(sel.xtarget == None)
 652                 sel.xtarget = XA_STRING;
 653 }
 654
 655 static int
 656 x2col(int x) {
 657         x -= borderpx;
 658         x /= xw.cw;
 659
 660         return LIMIT(x, 0, term.col-1);
 661 }
 662
 663 static int
 664 y2row(int y) {
 665         y -= borderpx;
 666         y /= xw.ch;
 667
 668         return LIMIT(y, 0, term.row-1);
 669 }
 670
 671 static int tlinelen(int y) {
 672         int i = term.col;
 673
 674         if(term.line[y][i - 1].mode & ATTR_WRAP)
 675                 return i;
 676
 677         while(i > 0 && term.line[y][i - 1].c[0] == ' ')
 678                 --i;
 679
 680         return i;
 681 }
 682
 683 static void
 684 selnormalize(void) {
 685         int i;
 686
 687         if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
 688                 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
 689                 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
 690         } else {
 691                 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
 692                 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
 693         }
 694         sel.nb.y = MIN(sel.ob.y, sel.oe.y);
 695         sel.ne.y = MAX(sel.ob.y, sel.oe.y);
 696
 697         selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
 698         selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
 699
 700         /* expand selection over line breaks */
 701         if (sel.type == SEL_RECTANGULAR)
 702                 return;
 703         i = tlinelen(sel.nb.y);
 704         if (i < sel.nb.x)
 705                 sel.nb.x = i;
 706         if (tlinelen(sel.ne.y) <= sel.ne.x)
 707                 sel.ne.x = term.col - 1;
 708 }
 709
 710 static inline bool
 711 selected(int x, int y) {
 712         if(sel.type == SEL_RECTANGULAR)
 713                 return BETWEEN(y, sel.nb.y, sel.ne.y)
 714                     && BETWEEN(x, sel.nb.x, sel.ne.x);
 715
 716         return BETWEEN(y, sel.nb.y, sel.ne.y)
 717             && (y != sel.nb.y || x >= sel.nb.x)
 718             && (y != sel.ne.y || x <= sel.ne.x);
 719 }
 720
 721 void
 722 selsnap(int mode, int *x, int *y, int direction) {
 723         int newx, newy, xt, yt;
 724         bool delim, prevdelim;
 725         Glyph *gp, *prevgp;
 726
 727         switch(mode) {
 728         case SNAP_WORD:
 729                 /*
 730                  * Snap around if the word wraps around at the end or
 731                  * beginning of a line.
 732                  */
 733                 prevgp = &term.line[*y][*x];
 734                 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
 735                 for(;;) {
 736                         newx = *x + direction;
 737                         newy = *y;
 738                         if(!BETWEEN(newx, 0, term.col - 1)) {
 739                                 newy += direction;
 740                                 newx = (newx + term.col) % term.col;
 741                                 if (!BETWEEN(newy, 0, term.row - 1))
 742                                         break;
 743
 744                                 if(direction > 0)
 745                                         yt = *y, xt = *x;
 746                                 else
 747                                         yt = newy, xt = newx;
 748                                 if(!(term.line[yt][xt].mode & ATTR_WRAP))
 749                                         break;
 750                         }
 751
 752                         if (newx >= tlinelen(newy))
 753                                 break;
 754
 755                         gp = &term.line[newy][newx];
 756                         delim = strchr(worddelimiters, gp->c[0]) != NULL;
 757                         if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
 758                                         || (delim && gp->c[0] != prevgp->c[0])))
 759                                 break;
 760
 761                         *x = newx;
 762                         *y = newy;
 763                         prevgp = gp;
 764                         prevdelim = delim;
 765                 }
 766                 break;
 767         case SNAP_LINE:
 768                 /*
 769                  * Snap around if the the previous line or the current one
 770                  * has set ATTR_WRAP at its end. Then the whole next or
 771                  * previous line will be selected.
 772                  */
 773                 *x = (direction < 0) ? 0 : term.col - 1;
 774                 if(direction < 0 && *y > 0) {
 775                         for(; *y > 0; *y += direction) {
 776                                 if(!(term.line[*y-1][term.col-1].mode
 777                                                 & ATTR_WRAP)) {
 778                                         break;
 779                                 }
 780                         }
 781                 } else if(direction > 0 && *y < term.row-1) {
 782                         for(; *y < term.row; *y += direction) {
 783                                 if(!(term.line[*y][term.col-1].mode
 784                                                 & ATTR_WRAP)) {
 785                                         break;
 786                                 }
 787                         }
 788                 }
 789                 break;
 790         }
 791 }
 792
 793 void
 794 getbuttoninfo(XEvent *e) {
 795         int type;
 796         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 797
 798         sel.alt = IS_SET(MODE_ALTSCREEN);
 799
 800         sel.oe.x = x2col(e->xbutton.x);
 801         sel.oe.y = y2row(e->xbutton.y);
 802         selnormalize();
 803
 804         sel.type = SEL_REGULAR;
 805         for(type = 1; type < LEN(selmasks); ++type) {
 806                 if(match(selmasks[type], state)) {
 807                         sel.type = type;
 808                         break;
 809                 }
 810         }
 811 }
 812
 813 void
 814 mousereport(XEvent *e) {
 815         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 816             button = e->xbutton.button, state = e->xbutton.state,
 817             len;
 818         char buf[40];
 819         static int ox, oy;
 820
 821         /* from urxvt */
 822         if(e->xbutton.type == MotionNotify) {
 823                 if(x == ox && y == oy)
 824                         return;
 825                 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 826                         return;
 827                 /* MOUSE_MOTION: no reporting if no button is pressed */
 828                 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 829                         return;
 830
 831                 button = oldbutton + 32;
 832                 ox = x;
 833                 oy = y;
 834         } else {
 835                 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 836                         button = 3;
 837                 } else {
 838                         button -= Button1;
 839                         if(button >= 3)
 840                                 button += 64 - 3;
 841                 }
 842                 if(e->xbutton.type == ButtonPress) {
 843                         oldbutton = button;
 844                         ox = x;
 845                         oy = y;
 846                 } else if(e->xbutton.type == ButtonRelease) {
 847                         oldbutton = 3;
 848                         /* MODE_MOUSEX10: no button release reporting */
 849                         if(IS_SET(MODE_MOUSEX10))
 850                                 return;
 851                         if (button == 64 || button == 65)
 852                                 return;
 853                 }
 854         }
 855
 856         if(!IS_SET(MODE_MOUSEX10)) {
 857                 button += (state & ShiftMask   ? 4  : 0)
 858                         + (state & Mod4Mask    ? 8  : 0)
 859                         + (state & ControlMask ? 16 : 0);
 860         }
 861
 862         len = 0;
 863         if(IS_SET(MODE_MOUSESGR)) {
 864                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 865                                 button, x+1, y+1,
 866                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 867         } else if(x < 223 && y < 223) {
 868                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 869                                 32+button, 32+x+1, 32+y+1);
 870         } else {
 871                 return;
 872         }
 873
 874         ttywrite(buf, len);
 875 }
 876
 877 void
 878 bpress(XEvent *e) {
 879         struct timespec now;
 880         Mousekey *mk;
 881
 882         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 883                 mousereport(e);
 884                 return;
 885         }
 886
 887         for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
 888                 if(e->xbutton.button == mk->b
 889                                 && match(mk->mask, e->xbutton.state)) {
 890                         ttysend(mk->s, strlen(mk->s));
 891                         return;
 892                 }
 893         }
 894
 895         if(e->xbutton.button == Button1) {
 896                 clock_gettime(CLOCK_MONOTONIC, &now);
 897
 898                 /* Clear previous selection, logically and visually. */
 899                 selclear(NULL);
 900                 sel.mode = 1;
 901                 sel.type = SEL_REGULAR;
 902                 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
 903                 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
 904
 905                 /*
 906                  * If the user clicks below predefined timeouts specific
 907                  * snapping behaviour is exposed.
 908                  */
 909                 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
 910                         sel.snap = SNAP_LINE;
 911                 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
 912                         sel.snap = SNAP_WORD;
 913                 } else {
 914                         sel.snap = 0;
 915                 }
 916                 selnormalize();
 917
 918                 /*
 919                  * Draw selection, unless it's regular and we don't want to
 920                  * make clicks visible
 921                  */
 922                 if(sel.snap != 0) {
 923                         sel.mode++;
 924                         tsetdirt(sel.nb.y, sel.ne.y);
 925                 }
 926                 sel.tclick2 = sel.tclick1;
 927                 sel.tclick1 = now;
 928         }
 929 }
 930
 931 char *
 932 getsel(void) {
 933         char *str, *ptr;
 934         int y, bufsize, size, lastx, linelen;
 935         Glyph *gp, *last;
 936
 937         if(sel.ob.x == -1)
 938                 return NULL;
 939
 940         bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
 941         ptr = str = xmalloc(bufsize);
 942
 943         /* append every set & selected glyph to the selection */
 944         for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
 945                 linelen = tlinelen(y);
 946
 947                 if(sel.type == SEL_RECTANGULAR) {
 948                         gp = &term.line[y][sel.nb.x];
 949                         lastx = sel.ne.x;
 950                 } else {
 951                         gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
 952                         lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
 953                 }
 954                 last = &term.line[y][MIN(lastx, linelen-1)];
 955                 while(last >= gp && last->c[0] == ' ')
 956                         --last;
 957
 958                 for( ; gp <= last; ++gp) {
 959                         if(gp->mode & ATTR_WDUMMY)
 960                                 continue;
 961
 962                         size = utf8len(gp->c);
 963                         memcpy(ptr, gp->c, size);
 964                         ptr += size;
 965                 }
 966
 967                 /*
 968                  * Copy and pasting of line endings is inconsistent
 969                  * in the inconsistent terminal and GUI world.
 970                  * The best solution seems like to produce '\n' when
 971                  * something is copied from st and convert '\n' to
 972                  * '\r', when something to be pasted is received by
 973                  * st.
 974                  * FIXME: Fix the computer world.
 975                  */
 976                 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
 977                         *ptr++ = '\n';
 978         }
 979         *ptr = 0;
 980         return str;
 981 }
 982
 983 void
 984 selcopy(void) {
 985         xsetsel(getsel());
 986 }
 987
 988 void
 989 selnotify(XEvent *e) {
 990         ulong nitems, ofs, rem;
 991         int format;
 992         uchar *data, *last, *repl;
 993         Atom type;
 994         XSelectionEvent *xsev;
 995
 996         ofs = 0;
 997         xsev = (XSelectionEvent *)e;
 998         do {
 999                 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1000                                         BUFSIZ/4, False, AnyPropertyType,
1001                                         &type, &format, &nitems, &rem,
1002                                         &data)) {
1003                         fprintf(stderr, "Clipboard allocation failed\n");
1004                         return;
1005                 }
1006
1007                 /*
1008                  * As seen in getsel:
1009                  * Line endings are inconsistent in the terminal and GUI world
1010                  * copy and pasting. When receiving some selection data,
1011                  * replace all '\n' with '\r'.
1012                  * FIXME: Fix the computer world.
1013                  */
1014                 repl = data;
1015                 last = data + nitems * format / 8;
1016                 while((repl = memchr(repl, '\n', last - repl))) {
1017                         *repl++ = '\r';
1018                 }
1019
1020                 if(IS_SET(MODE_BRCKTPASTE))
1021                         ttywrite("\033[200~", 6);
1022                 ttysend((char *)data, nitems * format / 8);
1023                 if(IS_SET(MODE_BRCKTPASTE))
1024                         ttywrite("\033[201~", 6);
1025                 XFree(data);
1026                 /* number of 32-bit chunks returned */
1027                 ofs += nitems * format / 32;
1028         } while(rem > 0);
1029 }
1030
1031 void
1032 selpaste(const Arg *dummy) {
1033         XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1034                         xw.win, CurrentTime);
1035 }
1036
1037 void
1038 clipcopy(const Arg *dummy) {
1039         Atom clipboard;
1040
1041         if(sel.clipboard != NULL)
1042                 free(sel.clipboard);
1043
1044         if(sel.primary != NULL) {
1045                 sel.clipboard = xstrdup(sel.primary);
1046                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1047                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1048         }
1049 }
1050
1051 void
1052 clippaste(const Arg *dummy) {
1053         Atom clipboard;
1054
1055         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1056         XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1057                         xw.win, CurrentTime);
1058 }
1059
1060 void
1061 selclear(XEvent *e) {
1062         if(sel.ob.x == -1)
1063                 return;
1064         sel.ob.x = -1;
1065         tsetdirt(sel.nb.y, sel.ne.y);
1066 }
1067
1068 void
1069 selrequest(XEvent *e) {
1070         XSelectionRequestEvent *xsre;
1071         XSelectionEvent xev;
1072         Atom xa_targets, string, clipboard;
1073         char *seltext;
1074
1075         xsre = (XSelectionRequestEvent *) e;
1076         xev.type = SelectionNotify;
1077         xev.requestor = xsre->requestor;
1078         xev.selection = xsre->selection;
1079         xev.target = xsre->target;
1080         xev.time = xsre->time;
1081         /* reject */
1082         xev.property = None;
1083
1084         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1085         if(xsre->target == xa_targets) {
1086                 /* respond with the supported type */
1087                 string = sel.xtarget;
1088                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1089                                 XA_ATOM, 32, PropModeReplace,
1090                                 (uchar *) &string, 1);
1091                 xev.property = xsre->property;
1092         } else if(xsre->target == sel.xtarget) {
1093                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1094                 if(xsre->selection == XA_PRIMARY) {
1095                         seltext = sel.primary;
1096                 } else if(xsre->selection == clipboard) {
1097                         seltext = sel.clipboard;
1098                 } else {
1099                         fprintf(stderr,
1100                                 "Unhandled clipboard selection 0x%lx\n",
1101                                 xsre->selection);
1102                         return;
1103                 }
1104                 if(seltext != NULL) {
1105                         XChangeProperty(xsre->display, xsre->requestor,
1106                                         xsre->property, xsre->target,
1107                                         8, PropModeReplace,
1108                                         (uchar *)seltext, strlen(seltext));
1109                         xev.property = xsre->property;
1110                 }
1111         }
1112
1113         /* all done, send a notification to the listener */
1114         if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1115                 fprintf(stderr, "Error sending SelectionNotify event\n");
1116 }
1117
1118 void
1119 xsetsel(char *str) {
1120         free(sel.primary);
1121         sel.primary = str;
1122
1123         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1124 }
1125
1126 void
1127 brelease(XEvent *e) {
1128         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1129                 mousereport(e);
1130                 return;
1131         }
1132
1133         if(e->xbutton.button == Button2) {
1134                 selpaste(NULL);
1135         } else if(e->xbutton.button == Button1) {
1136                 if(sel.mode < 2) {
1137                         selclear(NULL);
1138                 } else {
1139                         getbuttoninfo(e);
1140                         selcopy();
1141                 }
1142                 sel.mode = 0;
1143                 tsetdirt(sel.nb.y, sel.ne.y);
1144         }
1145 }
1146
1147 void
1148 bmotion(XEvent *e) {
1149         int oldey, oldex, oldsby, oldsey;
1150
1151         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1152                 mousereport(e);
1153                 return;
1154         }
1155
1156         if(!sel.mode)
1157                 return;
1158
1159         sel.mode++;
1160         oldey = sel.oe.y;
1161         oldex = sel.oe.x;
1162         oldsby = sel.nb.y;
1163         oldsey = sel.ne.y;
1164         getbuttoninfo(e);
1165
1166         if(oldey != sel.oe.y || oldex != sel.oe.x)
1167                 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1168 }
1169
1170 void
1171 die(const char *errstr, ...) {
1172         va_list ap;
1173
1174         va_start(ap, errstr);
1175         vfprintf(stderr, errstr, ap);
1176         va_end(ap);
1177         exit(EXIT_FAILURE);
1178 }
1179
1180 void
1181 execsh(void) {
1182         char **args, *sh, *prog;
1183         const struct passwd *pw;
1184         char buf[sizeof(long) * 8 + 1];
1185
1186         errno = 0;
1187         if((pw = getpwuid(getuid())) == NULL) {
1188                 if(errno)
1189                         die("getpwuid:%s\n", strerror(errno));
1190                 else
1191                         die("who are you?\n");
1192         }
1193
1194         if (!(sh = getenv("SHELL"))) {
1195                 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1196         }
1197
1198         if(opt_cmd)
1199                 prog = opt_cmd[0];
1200         else if(utmp)
1201                 prog = utmp;
1202         else
1203                 prog = sh;
1204         args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1205
1206         snprintf(buf, sizeof(buf), "%lu", xw.win);
1207
1208         unsetenv("COLUMNS");
1209         unsetenv("LINES");
1210         unsetenv("TERMCAP");
1211         setenv("LOGNAME", pw->pw_name, 1);
1212         setenv("USER", pw->pw_name, 1);
1213         setenv("SHELL", sh, 1);
1214         setenv("HOME", pw->pw_dir, 1);
1215         setenv("TERM", termname, 1);
1216         setenv("WINDOWID", buf, 1);
1217
1218         signal(SIGCHLD, SIG_DFL);
1219         signal(SIGHUP, SIG_DFL);
1220         signal(SIGINT, SIG_DFL);
1221         signal(SIGQUIT, SIG_DFL);
1222         signal(SIGTERM, SIG_DFL);
1223         signal(SIGALRM, SIG_DFL);
1224
1225         execvp(prog, args);
1226         _exit(EXIT_FAILURE);
1227 }
1228
1229 void
1230 sigchld(int a) {
1231         int stat, ret;
1232
1233         if(waitpid(pid, &stat, 0) < 0)
1234                 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1235
1236         ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1237         if (ret != EXIT_SUCCESS)
1238                 die("child finished with error '%d'\n", stat);
1239         exit(EXIT_SUCCESS);
1240 }
1241
1242 void
1243 ttynew(void) {
1244         int m, s;
1245         struct winsize w = {term.row, term.col, 0, 0};
1246
1247         /* seems to work fine on linux, openbsd and freebsd */
1248         if(openpty(&m, &s, NULL, NULL, &w) < 0)
1249                 die("openpty failed: %s\n", strerror(errno));
1250
1251         switch(pid = fork()) {
1252         case -1:
1253                 die("fork failed\n");
1254                 break;
1255         case 0:
1256                 setsid(); /* create a new process group */
1257                 dup2(s, STDIN_FILENO);
1258                 dup2(s, STDOUT_FILENO);
1259                 dup2(s, STDERR_FILENO);
1260                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1261                         die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1262                 close(s);
1263                 close(m);
1264                 execsh();
1265                 break;
1266         default:
1267                 close(s);
1268                 cmdfd = m;
1269                 signal(SIGCHLD, sigchld);
1270                 if(opt_io) {
1271                         term.mode |= MODE_PRINT;
1272                         iofd = (!strcmp(opt_io, "-")) ?
1273                                   STDOUT_FILENO :
1274                                   open(opt_io, O_WRONLY | O_CREAT, 0666);
1275                         if(iofd < 0) {
1276                                 fprintf(stderr, "Error opening %s:%s\n",
1277                                         opt_io, strerror(errno));
1278                         }
1279                 }
1280                 break;
1281         }
1282 }
1283
1284 void
1285 ttyread(void) {
1286         static char buf[BUFSIZ];
1287         static int buflen = 0;
1288         char *ptr;
1289         char s[UTF_SIZ];
1290         int charsize; /* size of utf8 char in bytes */
1291         long unicodep;
1292         int ret;
1293
1294         /* append read bytes to unprocessed bytes */
1295         if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1296                 die("Couldn't read from shell: %s\n", strerror(errno));
1297
1298         /* process every complete utf8 char */
1299         buflen += ret;
1300         ptr = buf;
1301         while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1302                 utf8encode(unicodep, s, UTF_SIZ);
1303                 tputc(s, charsize);
1304                 ptr += charsize;
1305                 buflen -= charsize;
1306         }
1307
1308         /* keep any uncomplete utf8 char for the next call */
1309         memmove(buf, ptr, buflen);
1310 }
1311
1312 void
1313 ttywrite(const char *s, size_t n) {
1314         if(xwrite(cmdfd, s, n) == -1)
1315                 die("write error on tty: %s\n", strerror(errno));
1316 }
1317
1318 void
1319 ttysend(char *s, size_t n) {
1320         ttywrite(s, n);
1321         if(IS_SET(MODE_ECHO))
1322                 techo(s, n);
1323 }
1324
1325 void
1326 ttyresize(void) {
1327         struct winsize w;
1328
1329         w.ws_row = term.row;
1330         w.ws_col = term.col;
1331         w.ws_xpixel = xw.tw;
1332         w.ws_ypixel = xw.th;
1333         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1334                 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1335 }
1336
1337 int
1338 tattrset(int attr) {
1339         int i, j;
1340
1341         for(i = 0; i < term.row-1; i++) {
1342                 for(j = 0; j < term.col-1; j++) {
1343                         if(term.line[i][j].mode & attr)
1344                                 return 1;
1345                 }
1346         }
1347
1348         return 0;
1349 }
1350
1351 void
1352 tsetdirt(int top, int bot) {
1353         int i;
1354
1355         LIMIT(top, 0, term.row-1);
1356         LIMIT(bot, 0, term.row-1);
1357
1358         for(i = top; i <= bot; i++)
1359                 term.dirty[i] = 1;
1360 }
1361
1362 void
1363 tsetdirtattr(int attr) {
1364         int i, j;
1365
1366         for(i = 0; i < term.row-1; i++) {
1367                 for(j = 0; j < term.col-1; j++) {
1368                         if(term.line[i][j].mode & attr) {
1369                                 tsetdirt(i, i);
1370                                 break;
1371                         }
1372                 }
1373         }
1374 }
1375
1376 void
1377 tfulldirt(void) {
1378         tsetdirt(0, term.row-1);
1379 }
1380
1381 void
1382 tcursor(int mode) {
1383         static TCursor c[2];
1384         bool alt = IS_SET(MODE_ALTSCREEN);
1385
1386         if(mode == CURSOR_SAVE) {
1387                 c[alt] = term.c;
1388         } else if(mode == CURSOR_LOAD) {
1389                 term.c = c[alt];
1390                 tmoveto(c[alt].x, c[alt].y);
1391         }
1392 }
1393
1394 void
1395 treset(void) {
1396         uint i;
1397
1398         term.c = (TCursor){{
1399                 .mode = ATTR_NULL,
1400                 .fg = defaultfg,
1401                 .bg = defaultbg
1402         }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1403
1404         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1405         for(i = tabspaces; i < term.col; i += tabspaces)
1406                 term.tabs[i] = 1;
1407         term.top = 0;
1408         term.bot = term.row - 1;
1409         term.mode = MODE_WRAP;
1410         memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1411         term.charset = 0;
1412
1413         for(i = 0; i < 2; i++) {
1414                 tmoveto(0, 0);
1415                 tcursor(CURSOR_SAVE);
1416                 tclearregion(0, 0, term.col-1, term.row-1);
1417                 tswapscreen();
1418         }
1419 }
1420
1421 void
1422 tnew(int col, int row) {
1423         term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1424         tresize(col, row);
1425         term.numlock = 1;
1426
1427         treset();
1428 }
1429
1430 void
1431 tswapscreen(void) {
1432         Line *tmp = term.line;
1433
1434         term.line = term.alt;
1435         term.alt = tmp;
1436         term.mode ^= MODE_ALTSCREEN;
1437         tfulldirt();
1438 }
1439
1440 void
1441 tscrolldown(int orig, int n) {
1442         int i;
1443         Line temp;
1444
1445         LIMIT(n, 0, term.bot-orig+1);
1446
1447         tsetdirt(orig, term.bot-n);
1448         tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1449
1450         for(i = term.bot; i >= orig+n; i--) {
1451                 temp = term.line[i];
1452                 term.line[i] = term.line[i-n];
1453                 term.line[i-n] = temp;
1454         }
1455
1456         selscroll(orig, n);
1457 }
1458
1459 void
1460 tscrollup(int orig, int n) {
1461         int i;
1462         Line temp;
1463
1464         LIMIT(n, 0, term.bot-orig+1);
1465
1466         tclearregion(0, orig, term.col-1, orig+n-1);
1467         tsetdirt(orig+n, term.bot);
1468
1469         for(i = orig; i <= term.bot-n; i++) {
1470                 temp = term.line[i];
1471                 term.line[i] = term.line[i+n];
1472                 term.line[i+n] = temp;
1473         }
1474
1475         selscroll(orig, -n);
1476 }
1477
1478 void
1479 selscroll(int orig, int n) {
1480         if(sel.ob.x == -1)
1481                 return;
1482
1483         if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1484                 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1485                         selclear(NULL);
1486                         return;
1487                 }
1488                 if(sel.type == SEL_RECTANGULAR) {
1489                         if(sel.ob.y < term.top)
1490                                 sel.ob.y = term.top;
1491                         if(sel.oe.y > term.bot)
1492                                 sel.oe.y = term.bot;
1493                 } else {
1494                         if(sel.ob.y < term.top) {
1495                                 sel.ob.y = term.top;
1496                                 sel.ob.x = 0;
1497                         }
1498                         if(sel.oe.y > term.bot) {
1499                                 sel.oe.y = term.bot;
1500                                 sel.oe.x = term.col;
1501                         }
1502                 }
1503                 selnormalize();
1504         }
1505 }
1506
1507 void
1508 tnewline(int first_col) {
1509         int y = term.c.y;
1510
1511         if(y == term.bot) {
1512                 tscrollup(term.top, 1);
1513         } else {
1514                 y++;
1515         }
1516         tmoveto(first_col ? 0 : term.c.x, y);
1517 }
1518
1519 void
1520 csiparse(void) {
1521         char *p = csiescseq.buf, *np;
1522         long int v;
1523
1524         csiescseq.narg = 0;
1525         if(*p == '?') {
1526                 csiescseq.priv = 1;
1527                 p++;
1528         }
1529
1530         csiescseq.buf[csiescseq.len] = '\0';
1531         while(p < csiescseq.buf+csiescseq.len) {
1532                 np = NULL;
1533                 v = strtol(p, &np, 10);
1534                 if(np == p)
1535                         v = 0;
1536                 if(v == LONG_MAX || v == LONG_MIN)
1537                         v = -1;
1538                 csiescseq.arg[csiescseq.narg++] = v;
1539                 p = np;
1540                 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1541                         break;
1542                 p++;
1543         }
1544         csiescseq.mode = *p;
1545 }
1546
1547 /* for absolute user moves, when decom is set */
1548 void
1549 tmoveato(int x, int y) {
1550         tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1551 }
1552
1553 void
1554 tmoveto(int x, int y) {
1555         int miny, maxy;
1556
1557         if(term.c.state & CURSOR_ORIGIN) {
1558                 miny = term.top;
1559                 maxy = term.bot;
1560         } else {
1561                 miny = 0;
1562                 maxy = term.row - 1;
1563         }
1564         LIMIT(x, 0, term.col-1);
1565         LIMIT(y, miny, maxy);
1566         term.c.state &= ~CURSOR_WRAPNEXT;
1567         term.c.x = x;
1568         term.c.y = y;
1569 }
1570
1571 void
1572 tsetchar(char *c, Glyph *attr, int x, int y) {
1573         static char *vt100_0[62] = { /* 0x41 - 0x7e */
1574                 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1575                 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1576                 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1577                 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1578                 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1579                 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1580                 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1581                 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1582         };
1583
1584         /*
1585          * The table is proudly stolen from rxvt.
1586          */
1587         if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1588                 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1589                         c = vt100_0[c[0] - 0x41];
1590                 }
1591         }
1592
1593         if(term.line[y][x].mode & ATTR_WIDE) {
1594                 if(x+1 < term.col) {
1595                         term.line[y][x+1].c[0] = ' ';
1596                         term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1597                 }
1598         } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1599                 term.line[y][x-1].c[0] = ' ';
1600                 term.line[y][x-1].mode &= ~ATTR_WIDE;
1601         }
1602
1603         term.dirty[y] = 1;
1604         term.line[y][x] = *attr;
1605         memcpy(term.line[y][x].c, c, UTF_SIZ);
1606 }
1607
1608 void
1609 tclearregion(int x1, int y1, int x2, int y2) {
1610         int x, y, temp;
1611         Glyph *gp;
1612
1613         if(x1 > x2)
1614                 temp = x1, x1 = x2, x2 = temp;
1615         if(y1 > y2)
1616                 temp = y1, y1 = y2, y2 = temp;
1617
1618         LIMIT(x1, 0, term.col-1);
1619         LIMIT(x2, 0, term.col-1);
1620         LIMIT(y1, 0, term.row-1);
1621         LIMIT(y2, 0, term.row-1);
1622
1623         for(y = y1; y <= y2; y++) {
1624                 term.dirty[y] = 1;
1625                 for(x = x1; x <= x2; x++) {
1626                         gp = &term.line[y][x];
1627                         if(selected(x, y))
1628                                 selclear(NULL);
1629                         gp->fg = term.c.attr.fg;
1630                         gp->bg = term.c.attr.bg;
1631                         gp->mode = 0;
1632                         memcpy(gp->c, " ", 2);
1633                 }
1634         }
1635 }
1636
1637 void
1638 tdeletechar(int n) {
1639         int dst, src, size;
1640         Glyph *line;
1641
1642         LIMIT(n, 0, term.col - term.c.x);
1643
1644         dst = term.c.x;
1645         src = term.c.x + n;
1646         size = term.col - src;
1647         line = term.line[term.c.y];
1648
1649         memmove(&line[dst], &line[src], size * sizeof(Glyph));
1650         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1651 }
1652
1653 void
1654 tinsertblank(int n) {
1655         int dst, src, size;
1656         Glyph *line;
1657
1658         LIMIT(n, 0, term.col - term.c.x);
1659
1660         dst = term.c.x + n;
1661         src = term.c.x;
1662         size = term.col - dst;
1663         line = term.line[term.c.y];
1664
1665         memmove(&line[dst], &line[src], size * sizeof(Glyph));
1666         tclearregion(src, term.c.y, dst - 1, term.c.y);
1667 }
1668
1669 void
1670 tinsertblankline(int n) {
1671         if(BETWEEN(term.c.y, term.top, term.bot))
1672                 tscrolldown(term.c.y, n);
1673 }
1674
1675 void
1676 tdeleteline(int n) {
1677         if(BETWEEN(term.c.y, term.top, term.bot))
1678                 tscrollup(term.c.y, n);
1679 }
1680
1681 int32_t
1682 tdefcolor(int *attr, int *npar, int l) {
1683         int32_t idx = -1;
1684         uint r, g, b;
1685
1686         switch (attr[*npar + 1]) {
1687         case 2: /* direct color in RGB space */
1688                 if (*npar + 4 >= l) {
1689                         fprintf(stderr,
1690                                 "erresc(38): Incorrect number of parameters (%d)\n",
1691                                 *npar);
1692                         break;
1693                 }
1694                 r = attr[*npar + 2];
1695                 g = attr[*npar + 3];
1696                 b = attr[*npar + 4];
1697                 *npar += 4;
1698                 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1699                         fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1700                                 r, g, b);
1701                 else
1702                         idx = TRUECOLOR(r, g, b);
1703                 break;
1704         case 5: /* indexed color */
1705                 if (*npar + 2 >= l) {
1706                         fprintf(stderr,
1707                                 "erresc(38): Incorrect number of parameters (%d)\n",
1708                                 *npar);
1709                         break;
1710                 }
1711                 *npar += 2;
1712                 if(!BETWEEN(attr[*npar], 0, 255))
1713                         fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1714                 else
1715                         idx = attr[*npar];
1716                 break;
1717         case 0: /* implemented defined (only foreground) */
1718         case 1: /* transparent */
1719         case 3: /* direct color in CMY space */
1720         case 4: /* direct color in CMYK space */
1721         default:
1722                 fprintf(stderr,
1723                         "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1724                 break;
1725         }
1726
1727         return idx;
1728 }
1729
1730 void
1731 tsetattr(int *attr, int l) {
1732         int i;
1733         int32_t idx;
1734
1735         for(i = 0; i < l; i++) {
1736                 switch(attr[i]) {
1737                 case 0:
1738                         term.c.attr.mode &= ~(
1739                                 ATTR_BOLD       |
1740                                 ATTR_FAINT      |
1741                                 ATTR_ITALIC     |
1742                                 ATTR_UNDERLINE  |
1743                                 ATTR_BLINK      |
1744                                 ATTR_REVERSE    |
1745                                 ATTR_INVISIBLE  |
1746                                 ATTR_STRUCK     );
1747                         term.c.attr.fg = defaultfg;
1748                         term.c.attr.bg = defaultbg;
1749                         break;
1750                 case 1:
1751                         term.c.attr.mode |= ATTR_BOLD;
1752                         break;
1753                 case 2:
1754                         term.c.attr.mode |= ATTR_FAINT;
1755                         break;
1756                 case 3:
1757                         term.c.attr.mode |= ATTR_ITALIC;
1758                         break;
1759                 case 4:
1760                         term.c.attr.mode |= ATTR_UNDERLINE;
1761                         break;
1762                 case 5: /* slow blink */
1763                         /* FALLTHROUGH */
1764                 case 6: /* rapid blink */
1765                         term.c.attr.mode |= ATTR_BLINK;
1766                         break;
1767                 case 7:
1768                         term.c.attr.mode |= ATTR_REVERSE;
1769                         break;
1770                 case 8:
1771                         term.c.attr.mode |= ATTR_INVISIBLE;
1772                         break;
1773                 case 9:
1774                         term.c.attr.mode |= ATTR_STRUCK;
1775                         break;
1776                 case 22:
1777                         term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1778                         break;
1779                 case 23:
1780                         term.c.attr.mode &= ~ATTR_ITALIC;
1781                         break;
1782                 case 24:
1783                         term.c.attr.mode &= ~ATTR_UNDERLINE;
1784                         break;
1785                 case 25:
1786                         term.c.attr.mode &= ~ATTR_BLINK;
1787                         break;
1788                 case 27:
1789                         term.c.attr.mode &= ~ATTR_REVERSE;
1790                         break;
1791                 case 28:
1792                         term.c.attr.mode &= ~ATTR_INVISIBLE;
1793                         break;
1794                 case 29:
1795                         term.c.attr.mode &= ~ATTR_STRUCK;
1796                         break;
1797                 case 38:
1798                         if ((idx = tdefcolor(attr, &i, l)) >= 0)
1799                                 term.c.attr.fg = idx;
1800                         break;
1801                 case 39:
1802                         term.c.attr.fg = defaultfg;
1803                         break;
1804                 case 48:
1805                         if ((idx = tdefcolor(attr, &i, l)) >= 0)
1806                                 term.c.attr.bg = idx;
1807                         break;
1808                 case 49:
1809                         term.c.attr.bg = defaultbg;
1810                         break;
1811                 default:
1812                         if(BETWEEN(attr[i], 30, 37)) {
1813                                 term.c.attr.fg = attr[i] - 30;
1814                         } else if(BETWEEN(attr[i], 40, 47)) {
1815                                 term.c.attr.bg = attr[i] - 40;
1816                         } else if(BETWEEN(attr[i], 90, 97)) {
1817                                 term.c.attr.fg = attr[i] - 90 + 8;
1818                         } else if(BETWEEN(attr[i], 100, 107)) {
1819                                 term.c.attr.bg = attr[i] - 100 + 8;
1820                         } else {
1821                                 fprintf(stderr,
1822                                         "erresc(default): gfx attr %d unknown\n",
1823                                         attr[i]), csidump();
1824                         }
1825                         break;
1826                 }
1827         }
1828 }
1829
1830 void
1831 tsetscroll(int t, int b) {
1832         int temp;
1833
1834         LIMIT(t, 0, term.row-1);
1835         LIMIT(b, 0, term.row-1);
1836         if(t > b) {
1837                 temp = t;
1838                 t = b;
1839                 b = temp;
1840         }
1841         term.top = t;
1842         term.bot = b;
1843 }
1844
1845 void
1846 tsetmode(bool priv, bool set, int *args, int narg) {
1847         int *lim, mode;
1848         bool alt;
1849
1850         for(lim = args + narg; args < lim; ++args) {
1851                 if(priv) {
1852                         switch(*args) {
1853                         case 1: /* DECCKM -- Cursor key */
1854                                 MODBIT(term.mode, set, MODE_APPCURSOR);
1855                                 break;
1856                         case 5: /* DECSCNM -- Reverse video */
1857                                 mode = term.mode;
1858                                 MODBIT(term.mode, set, MODE_REVERSE);
1859                                 if(mode != term.mode)
1860                                         redraw();
1861                                 break;
1862                         case 6: /* DECOM -- Origin */
1863                                 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1864                                 tmoveato(0, 0);
1865                                 break;
1866                         case 7: /* DECAWM -- Auto wrap */
1867                                 MODBIT(term.mode, set, MODE_WRAP);
1868                                 break;
1869                         case 0:  /* Error (IGNORED) */
1870                         case 2:  /* DECANM -- ANSI/VT52 (IGNORED) */
1871                         case 3:  /* DECCOLM -- Column  (IGNORED) */
1872                         case 4:  /* DECSCLM -- Scroll (IGNORED) */
1873                         case 8:  /* DECARM -- Auto repeat (IGNORED) */
1874                         case 18: /* DECPFF -- Printer feed (IGNORED) */
1875                         case 19: /* DECPEX -- Printer extent (IGNORED) */
1876                         case 42: /* DECNRCM -- National characters (IGNORED) */
1877                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
1878                                 break;
1879                         case 25: /* DECTCEM -- Text Cursor Enable Mode */
1880                                 MODBIT(term.mode, !set, MODE_HIDE);
1881                                 break;
1882                         case 9:    /* X10 mouse compatibility mode */
1883                                 xsetpointermotion(0);
1884                                 MODBIT(term.mode, 0, MODE_MOUSE);
1885                                 MODBIT(term.mode, set, MODE_MOUSEX10);
1886                                 break;
1887                         case 1000: /* 1000: report button press */
1888                                 xsetpointermotion(0);
1889                                 MODBIT(term.mode, 0, MODE_MOUSE);
1890                                 MODBIT(term.mode, set, MODE_MOUSEBTN);
1891                                 break;
1892                         case 1002: /* 1002: report motion on button press */
1893                                 xsetpointermotion(0);
1894                                 MODBIT(term.mode, 0, MODE_MOUSE);
1895                                 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1896                                 break;
1897                         case 1003: /* 1003: enable all mouse motions */
1898                                 xsetpointermotion(set);
1899                                 MODBIT(term.mode, 0, MODE_MOUSE);
1900                                 MODBIT(term.mode, set, MODE_MOUSEMANY);
1901                                 break;
1902                         case 1004: /* 1004: send focus events to tty */
1903                                 MODBIT(term.mode, set, MODE_FOCUS);
1904                                 break;
1905                         case 1006: /* 1006: extended reporting mode */
1906                                 MODBIT(term.mode, set, MODE_MOUSESGR);
1907                                 break;
1908                         case 1034:
1909                                 MODBIT(term.mode, set, MODE_8BIT);
1910                                 break;
1911                         case 1049: /* swap screen & set/restore cursor as xterm */
1912                                 if (!allowaltscreen)
1913                                         break;
1914                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1915                                 /* FALLTHROUGH */
1916                         case 47: /* swap screen */
1917                         case 1047:
1918                                 if (!allowaltscreen)
1919                                         break;
1920                                 alt = IS_SET(MODE_ALTSCREEN);
1921                                 if(alt) {
1922                                         tclearregion(0, 0, term.col-1,
1923                                                         term.row-1);
1924                                 }
1925                                 if(set ^ alt) /* set is always 1 or 0 */
1926                                         tswapscreen();
1927                                 if(*args != 1049)
1928                                         break;
1929                                 /* FALLTHROUGH */
1930                         case 1048:
1931                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1932                                 break;
1933                         case 2004: /* 2004: bracketed paste mode */
1934                                 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1935                                 break;
1936                         /* Not implemented mouse modes. See comments there. */
1937                         case 1001: /* mouse highlight mode; can hang the
1938                                       terminal by design when implemented. */
1939                         case 1005: /* UTF-8 mouse mode; will confuse
1940                                       applications not supporting UTF-8
1941                                       and luit. */
1942                         case 1015: /* urxvt mangled mouse mode; incompatible
1943                                       and can be mistaken for other control
1944                                       codes. */
1945                         default:
1946                                 fprintf(stderr,
1947                                         "erresc: unknown private set/reset mode %d\n",
1948                                         *args);
1949                                 break;
1950                         }
1951                 } else {
1952                         switch(*args) {
1953                         case 0:  /* Error (IGNORED) */
1954                                 break;
1955                         case 2:  /* KAM -- keyboard action */
1956                                 MODBIT(term.mode, set, MODE_KBDLOCK);
1957                                 break;
1958                         case 4:  /* IRM -- Insertion-replacement */
1959                                 MODBIT(term.mode, set, MODE_INSERT);
1960                                 break;
1961                         case 12: /* SRM -- Send/Receive */
1962                                 MODBIT(term.mode, !set, MODE_ECHO);
1963                                 break;
1964                         case 20: /* LNM -- Linefeed/new line */
1965                                 MODBIT(term.mode, set, MODE_CRLF);
1966                                 break;
1967                         default:
1968                                 fprintf(stderr,
1969                                         "erresc: unknown set/reset mode %d\n",
1970                                         *args);
1971                                 break;
1972                         }
1973                 }
1974         }
1975 }
1976
1977 void
1978 csihandle(void) {
1979         char buf[40];
1980         int len;
1981
1982         switch(csiescseq.mode) {
1983         default:
1984         unknown:
1985                 fprintf(stderr, "erresc: unknown csi ");
1986                 csidump();
1987                 /* die(""); */
1988                 break;
1989         case '@': /* ICH -- Insert <n> blank char */
1990                 DEFAULT(csiescseq.arg[0], 1);
1991                 tinsertblank(csiescseq.arg[0]);
1992                 break;
1993         case 'A': /* CUU -- Cursor <n> Up */
1994                 DEFAULT(csiescseq.arg[0], 1);
1995                 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1996                 break;
1997         case 'B': /* CUD -- Cursor <n> Down */
1998         case 'e': /* VPR --Cursor <n> Down */
1999                 DEFAULT(csiescseq.arg[0], 1);
2000                 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2001                 break;
2002         case 'i': /* MC -- Media Copy */
2003                 switch(csiescseq.arg[0]) {
2004                 case 0:
2005                         tdump();
2006                         break;
2007                 case 1:
2008                         tdumpline(term.c.y);
2009                         break;
2010                 case 2:
2011                         tdumpsel();
2012                         break;
2013                 case 4:
2014                         term.mode &= ~MODE_PRINT;
2015                         break;
2016                 case 5:
2017                         term.mode |= MODE_PRINT;
2018                         break;
2019                 }
2020                 break;
2021         case 'c': /* DA -- Device Attributes */
2022                 if(csiescseq.arg[0] == 0)
2023                         ttywrite(vtiden, sizeof(vtiden) - 1);
2024                 break;
2025         case 'C': /* CUF -- Cursor <n> Forward */
2026         case 'a': /* HPR -- Cursor <n> Forward */
2027                 DEFAULT(csiescseq.arg[0], 1);
2028                 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2029                 break;
2030         case 'D': /* CUB -- Cursor <n> Backward */
2031                 DEFAULT(csiescseq.arg[0], 1);
2032                 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2033                 break;
2034         case 'E': /* CNL -- Cursor <n> Down and first col */
2035                 DEFAULT(csiescseq.arg[0], 1);
2036                 tmoveto(0, term.c.y+csiescseq.arg[0]);
2037                 break;
2038         case 'F': /* CPL -- Cursor <n> Up and first col */
2039                 DEFAULT(csiescseq.arg[0], 1);
2040                 tmoveto(0, term.c.y-csiescseq.arg[0]);
2041                 break;
2042         case 'g': /* TBC -- Tabulation clear */
2043                 switch(csiescseq.arg[0]) {
2044                 case 0: /* clear current tab stop */
2045                         term.tabs[term.c.x] = 0;
2046                         break;
2047                 case 3: /* clear all the tabs */
2048                         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2049                         break;
2050                 default:
2051                         goto unknown;
2052                 }
2053                 break;
2054         case 'G': /* CHA -- Move to <col> */
2055         case '`': /* HPA */
2056                 DEFAULT(csiescseq.arg[0], 1);
2057                 tmoveto(csiescseq.arg[0]-1, term.c.y);
2058                 break;
2059         case 'H': /* CUP -- Move to <row> <col> */
2060         case 'f': /* HVP */
2061                 DEFAULT(csiescseq.arg[0], 1);
2062                 DEFAULT(csiescseq.arg[1], 1);
2063                 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2064                 break;
2065         case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2066                 DEFAULT(csiescseq.arg[0], 1);
2067                 tputtab(csiescseq.arg[0]);
2068                 break;
2069         case 'J': /* ED -- Clear screen */
2070                 selclear(NULL);
2071                 switch(csiescseq.arg[0]) {
2072                 case 0: /* below */
2073                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2074                         if(term.c.y < term.row-1) {
2075                                 tclearregion(0, term.c.y+1, term.col-1,
2076                                                 term.row-1);
2077                         }
2078                         break;
2079                 case 1: /* above */
2080                         if(term.c.y > 1)
2081                                 tclearregion(0, 0, term.col-1, term.c.y-1);
2082                         tclearregion(0, term.c.y, term.c.x, term.c.y);
2083                         break;
2084                 case 2: /* all */
2085                         tclearregion(0, 0, term.col-1, term.row-1);
2086                         break;
2087                 default:
2088                         goto unknown;
2089                 }
2090                 break;
2091         case 'K': /* EL -- Clear line */
2092                 switch(csiescseq.arg[0]) {
2093                 case 0: /* right */
2094                         tclearregion(term.c.x, term.c.y, term.col-1,
2095                                         term.c.y);
2096                         break;
2097                 case 1: /* left */
2098                         tclearregion(0, term.c.y, term.c.x, term.c.y);
2099                         break;
2100                 case 2: /* all */
2101                         tclearregion(0, term.c.y, term.col-1, term.c.y);
2102                         break;
2103                 }
2104                 break;
2105         case 'S': /* SU -- Scroll <n> line up */
2106                 DEFAULT(csiescseq.arg[0], 1);
2107                 tscrollup(term.top, csiescseq.arg[0]);
2108                 break;
2109         case 'T': /* SD -- Scroll <n> line down */
2110                 DEFAULT(csiescseq.arg[0], 1);
2111                 tscrolldown(term.top, csiescseq.arg[0]);
2112                 break;
2113         case 'L': /* IL -- Insert <n> blank lines */
2114                 DEFAULT(csiescseq.arg[0], 1);
2115                 tinsertblankline(csiescseq.arg[0]);
2116                 break;
2117         case 'l': /* RM -- Reset Mode */
2118                 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2119                 break;
2120         case 'M': /* DL -- Delete <n> lines */
2121                 DEFAULT(csiescseq.arg[0], 1);
2122                 tdeleteline(csiescseq.arg[0]);
2123                 break;
2124         case 'X': /* ECH -- Erase <n> char */
2125                 DEFAULT(csiescseq.arg[0], 1);
2126                 tclearregion(term.c.x, term.c.y,
2127                                 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2128                 break;
2129         case 'P': /* DCH -- Delete <n> char */
2130                 DEFAULT(csiescseq.arg[0], 1);
2131                 tdeletechar(csiescseq.arg[0]);
2132                 break;
2133         case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2134                 DEFAULT(csiescseq.arg[0], 1);
2135                 tputtab(-csiescseq.arg[0]);
2136                 break;
2137         case 'd': /* VPA -- Move to <row> */
2138                 DEFAULT(csiescseq.arg[0], 1);
2139                 tmoveato(term.c.x, csiescseq.arg[0]-1);
2140                 break;
2141         case 'h': /* SM -- Set terminal mode */
2142                 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2143                 break;
2144         case 'm': /* SGR -- Terminal attribute (color) */
2145                 tsetattr(csiescseq.arg, csiescseq.narg);
2146                 break;
2147         case 'n': /* DSR – Device Status Report (cursor position) */
2148                 if (csiescseq.arg[0] == 6) {
2149                         len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2150                                         term.c.y+1, term.c.x+1);
2151                         ttywrite(buf, len);
2152                 }
2153                 break;
2154         case 'r': /* DECSTBM -- Set Scrolling Region */
2155                 if(csiescseq.priv) {
2156                         goto unknown;
2157                 } else {
2158                         DEFAULT(csiescseq.arg[0], 1);
2159                         DEFAULT(csiescseq.arg[1], term.row);
2160                         tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2161                         tmoveato(0, 0);
2162                 }
2163                 break;
2164         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2165                 tcursor(CURSOR_SAVE);
2166                 break;
2167         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2168                 tcursor(CURSOR_LOAD);
2169                 break;
2170         }
2171 }
2172
2173 void
2174 csidump(void) {
2175         int i;
2176         uint c;
2177
2178         printf("ESC[");
2179         for(i = 0; i < csiescseq.len; i++) {
2180                 c = csiescseq.buf[i] & 0xff;
2181                 if(isprint(c)) {
2182                         putchar(c);
2183                 } else if(c == '\n') {
2184                         printf("(\\n)");
2185                 } else if(c == '\r') {
2186                         printf("(\\r)");
2187                 } else if(c == 0x1b) {
2188                         printf("(\\e)");
2189                 } else {
2190                         printf("(%02x)", c);
2191                 }
2192         }
2193         putchar('\n');
2194 }
2195
2196 void
2197 csireset(void) {
2198         memset(&csiescseq, 0, sizeof(csiescseq));
2199 }
2200
2201 void
2202 strhandle(void) {
2203         char *p = NULL;
2204         int j, narg, par;
2205
2206         term.esc &= ~(ESC_STR_END|ESC_STR);
2207         strparse();
2208         narg = strescseq.narg;
2209         par = atoi(strescseq.args[0]);
2210
2211         switch(strescseq.type) {
2212         case ']': /* OSC -- Operating System Command */
2213                 switch(par) {
2214                 case 0:
2215                 case 1:
2216                 case 2:
2217                         if(narg > 1)
2218                                 xsettitle(strescseq.args[1]);
2219                         return;
2220                 case 4: /* color set */
2221                         if(narg < 3)
2222                                 break;
2223                         p = strescseq.args[2];
2224                         /* FALLTHROUGH */
2225                 case 104: /* color reset, here p = NULL */
2226                         j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2227                         if(xsetcolorname(j, p)) {
2228                                 fprintf(stderr, "erresc: invalid color %s\n", p);
2229                         } else {
2230                                 /*
2231                                  * TODO if defaultbg color is changed, borders
2232                                  * are dirty
2233                                  */
2234                                 redraw();
2235                         }
2236                         return;
2237                 }
2238                 break;
2239         case 'k': /* old title set compatibility */
2240                 xsettitle(strescseq.args[0]);
2241                 return;
2242         case 'P': /* DCS -- Device Control String */
2243         case '_': /* APC -- Application Program Command */
2244         case '^': /* PM -- Privacy Message */
2245                 return;
2246         }
2247
2248         fprintf(stderr, "erresc: unknown str ");
2249         strdump();
2250 }
2251
2252 void
2253 strparse(void) {
2254         char *p = strescseq.buf;
2255
2256         strescseq.narg = 0;
2257         strescseq.buf[strescseq.len] = '\0';
2258         while(p && strescseq.narg < STR_ARG_SIZ)
2259                 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2260 }
2261
2262 void
2263 strdump(void) {
2264         int i;
2265         uint c;
2266
2267         printf("ESC%c", strescseq.type);
2268         for(i = 0; i < strescseq.len; i++) {
2269                 c = strescseq.buf[i] & 0xff;
2270                 if(c == '\0') {
2271                         return;
2272                 } else if(isprint(c)) {
2273                         putchar(c);
2274                 } else if(c == '\n') {
2275                         printf("(\\n)");
2276                 } else if(c == '\r') {
2277                         printf("(\\r)");
2278                 } else if(c == 0x1b) {
2279                         printf("(\\e)");
2280                 } else {
2281                         printf("(%02x)", c);
2282                 }
2283         }
2284         printf("ESC\\\n");
2285 }
2286
2287 void
2288 strreset(void) {
2289         memset(&strescseq, 0, sizeof(strescseq));
2290 }
2291
2292 void
2293 tprinter(char *s, size_t len) {
2294         if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2295                 fprintf(stderr, "Error writing in %s:%s\n",
2296                         opt_io, strerror(errno));
2297                 close(iofd);
2298                 iofd = -1;
2299         }
2300 }
2301
2302 void
2303 toggleprinter(const Arg *arg) {
2304         term.mode ^= MODE_PRINT;
2305 }
2306
2307 void
2308 printscreen(const Arg *arg) {
2309         tdump();
2310 }
2311
2312 void
2313 printsel(const Arg *arg) {
2314         tdumpsel();
2315 }
2316
2317 void
2318 tdumpsel(void) {
2319         char *ptr;
2320
2321         if((ptr = getsel())) {
2322                 tprinter(ptr, strlen(ptr));
2323                 free(ptr);
2324         }
2325 }
2326
2327 void
2328 tdumpline(int n) {
2329         Glyph *bp, *end;
2330
2331         bp = &term.line[n][0];
2332         end = &bp[MIN(tlinelen(n), term.col) - 1];
2333         if(bp != end || bp->c[0] != ' ') {
2334                 for( ;bp <= end; ++bp)
2335                         tprinter(bp->c, utf8len(bp->c));
2336         }
2337         tprinter("\n", 1);
2338 }
2339
2340 void
2341 tdump(void) {
2342         int i;
2343
2344         for(i = 0; i < term.row; ++i)
2345                 tdumpline(i);
2346 }
2347
2348 void
2349 tputtab(int n) {
2350         uint x = term.c.x;
2351
2352         if(n > 0) {
2353                 while(x < term.col && n--)
2354                         for(++x; x < term.col && !term.tabs[x]; ++x)
2355                                 /* nothing */ ;
2356         } else if(n < 0) {
2357                 while(x > 0 && n++)
2358                         for(--x; x > 0 && !term.tabs[x]; --x)
2359                                 /* nothing */ ;
2360         }
2361         tmoveto(x, term.c.y);
2362 }
2363
2364 void
2365 techo(char *buf, int len) {
2366         for(; len > 0; buf++, len--) {
2367                 char c = *buf;
2368
2369                 if(ISCONTROL((uchar) c)) { /* control code */
2370                         if(c & 0x80) {
2371                                 c &= 0x7f;
2372                                 tputc("^", 1);
2373                                 tputc("[", 1);
2374                         } else if(c != '\n' && c != '\r' && c != '\t') {
2375                                 c ^= 0x40;
2376                                 tputc("^", 1);
2377                         }
2378                         tputc(&c, 1);
2379                 } else {
2380                         break;
2381                 }
2382         }
2383         if(len)
2384                 tputc(buf, len);
2385 }
2386
2387 void
2388 tdeftran(char ascii) {
2389         static char cs[] = "0B";
2390         static int vcs[] = {CS_GRAPHIC0, CS_USA};
2391         char *p;
2392
2393         if((p = strchr(cs, ascii)) == NULL) {
2394                 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2395         } else {
2396                 term.trantbl[term.icharset] = vcs[p - cs];
2397         }
2398 }
2399
2400 void
2401 tdectest(char c) {
2402         static char E[UTF_SIZ] = "E";
2403         int x, y;
2404
2405         if(c == '8') { /* DEC screen alignment test. */
2406                 for(x = 0; x < term.col; ++x) {
2407                         for(y = 0; y < term.row; ++y)
2408                                 tsetchar(E, &term.c.attr, x, y);
2409                 }
2410         }
2411 }
2412
2413 void
2414 tstrsequence(uchar c) {
2415         if (c & 0x80) {
2416                 switch (c) {
2417                 case 0x90:   /* DCS -- Device Control String */
2418                         c = 'P';
2419                         break;
2420                 case 0x9f:   /* APC -- Application Program Command */
2421                         c = '_';
2422                         break;
2423                 case 0x9e:   /* PM -- Privacy Message */
2424                         c = '^';
2425                         break;
2426                 case 0x9d:   /* OSC -- Operating System Command */
2427                         c = ']';
2428                         break;
2429                 }
2430         }
2431         strreset();
2432         strescseq.type = c;
2433         term.esc |= ESC_STR;
2434         return;
2435 }
2436
2437 void
2438 tcontrolcode(uchar ascii) {
2439         static char question[UTF_SIZ] = "?";
2440
2441         switch(ascii) {
2442         case '\t':   /* HT */
2443                 tputtab(1);
2444                 return;
2445         case '\b':   /* BS */
2446                 tmoveto(term.c.x-1, term.c.y);
2447                 return;
2448         case '\r':   /* CR */
2449                 tmoveto(0, term.c.y);
2450                 return;
2451         case '\f':   /* LF */
2452         case '\v':   /* VT */
2453         case '\n':   /* LF */
2454                 /* go to first col if the mode is set */
2455                 tnewline(IS_SET(MODE_CRLF));
2456                 return;
2457         case '\a':   /* BEL */
2458                 if(term.esc & ESC_STR_END) {
2459                         /* backwards compatibility to xterm */
2460                         strhandle();
2461                 } else {
2462                         if(!(xw.state & WIN_FOCUSED))
2463                                 xseturgency(1);
2464                         if (bellvolume)
2465                                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2466                 }
2467                 break;
2468         case '\033': /* ESC */
2469                 csireset();
2470                 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2471                 term.esc |= ESC_START;
2472                 return;
2473         case '\016': /* SO (LS1 -- Locking shift 1) */
2474         case '\017': /* SI (LS0 -- Locking shift 0) */
2475                 term.charset = 1 - (ascii - '\016');
2476                 return;
2477         case '\032': /* SUB */
2478                 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2479         case '\030': /* CAN */
2480                 csireset();
2481                 break;
2482         case '\005': /* ENQ (IGNORED) */
2483         case '\000': /* NUL (IGNORED) */
2484         case '\021': /* XON (IGNORED) */
2485         case '\023': /* XOFF (IGNORED) */
2486         case 0177:   /* DEL (IGNORED) */
2487                 return;
2488         case 0x84:   /* TODO: IND */
2489                 break;
2490         case 0x85:   /* NEL -- Next line */
2491                 tnewline(1); /* always go to first col */
2492                 break;
2493         case 0x88:   /* HTS -- Horizontal tab stop */
2494                 term.tabs[term.c.x] = 1;
2495                 break;
2496         case 0x8d:   /* TODO: RI */
2497         case 0x8e:   /* TODO: SS2 */
2498         case 0x8f:   /* TODO: SS3 */
2499         case 0x98:   /* TODO: SOS */
2500                 break;
2501         case 0x9a:   /* DECID -- Identify Terminal */
2502                 ttywrite(vtiden, sizeof(vtiden) - 1);
2503                 break;
2504         case 0x9b:   /* TODO: CSI */
2505         case 0x9c:   /* TODO: ST */
2506                 break;
2507         case 0x90:   /* DCS -- Device Control String */
2508         case 0x9f:   /* APC -- Application Program Command */
2509         case 0x9e:   /* PM -- Privacy Message */
2510         case 0x9d:   /* OSC -- Operating System Command */
2511                 tstrsequence(ascii);
2512                 return;
2513         }
2514         /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2515         term.esc &= ~(ESC_STR_END|ESC_STR);
2516         return;
2517 }
2518
2519 /*
2520  * returns 1 when the sequence is finished and it hasn't to read
2521  * more characters for this sequence, otherwise 0
2522  */
2523 int
2524 eschandle(uchar ascii) {
2525         switch(ascii) {
2526         case '[':
2527                 term.esc |= ESC_CSI;
2528                 return 0;
2529         case '#':
2530                 term.esc |= ESC_TEST;
2531                 return 0;
2532         case 'P': /* DCS -- Device Control String */
2533         case '_': /* APC -- Application Program Command */
2534         case '^': /* PM -- Privacy Message */
2535         case ']': /* OSC -- Operating System Command */
2536         case 'k': /* old title set compatibility */
2537                 tstrsequence(ascii);
2538                 return 0;
2539         case 'n': /* LS2 -- Locking shift 2 */
2540         case 'o': /* LS3 -- Locking shift 3 */
2541                 term.charset = 2 + (ascii - 'n');
2542                 break;
2543         case '(': /* GZD4 -- set primary charset G0 */
2544         case ')': /* G1D4 -- set secondary charset G1 */
2545         case '*': /* G2D4 -- set tertiary charset G2 */
2546         case '+': /* G3D4 -- set quaternary charset G3 */
2547                 term.icharset = ascii - '(';
2548                 term.esc |= ESC_ALTCHARSET;
2549                 return 0;
2550         case 'D': /* IND -- Linefeed */
2551                 if(term.c.y == term.bot) {
2552                         tscrollup(term.top, 1);
2553                 } else {
2554                         tmoveto(term.c.x, term.c.y+1);
2555                 }
2556                 break;
2557         case 'E': /* NEL -- Next line */
2558                 tnewline(1); /* always go to first col */
2559                 break;
2560         case 'H': /* HTS -- Horizontal tab stop */
2561                 term.tabs[term.c.x] = 1;
2562                 break;
2563         case 'M': /* RI -- Reverse index */
2564                 if(term.c.y == term.top) {
2565                         tscrolldown(term.top, 1);
2566                 } else {
2567                         tmoveto(term.c.x, term.c.y-1);
2568                 }
2569                 break;
2570         case 'Z': /* DECID -- Identify Terminal */
2571                 ttywrite(vtiden, sizeof(vtiden) - 1);
2572                 break;
2573         case 'c': /* RIS -- Reset to inital state */
2574                 treset();
2575                 xresettitle();
2576                 xloadcols();
2577                 break;
2578         case '=': /* DECPAM -- Application keypad */
2579                 term.mode |= MODE_APPKEYPAD;
2580                 break;
2581         case '>': /* DECPNM -- Normal keypad */
2582                 term.mode &= ~MODE_APPKEYPAD;
2583                 break;
2584         case '7': /* DECSC -- Save Cursor */
2585                 tcursor(CURSOR_SAVE);
2586                 break;
2587         case '8': /* DECRC -- Restore Cursor */
2588                 tcursor(CURSOR_LOAD);
2589                 break;
2590         case '\\': /* ST -- String Terminator */
2591                 if(term.esc & ESC_STR_END)
2592                         strhandle();
2593                 break;
2594         default:
2595                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2596                         (uchar) ascii, isprint(ascii)? ascii:'.');
2597                 break;
2598         }
2599         return 1;
2600 }
2601
2602 void
2603 tputc(char *c, int len) {
2604         uchar ascii;
2605         bool control;
2606         long unicodep;
2607         int width;
2608         Glyph *gp;
2609
2610         if(len == 1) {
2611                 width = 1;
2612                 unicodep = ascii = *c;
2613         } else {
2614                 utf8decode(c, &unicodep, UTF_SIZ);
2615                 if ((width = wcwidth(unicodep)) == -1) {
2616                         c = "\357\277\275";     /* UTF_INVALID */
2617                         width = 1;
2618                 }
2619                 control = ISCONTROLC1(unicodep);
2620                 ascii = unicodep;
2621         }
2622
2623         if(IS_SET(MODE_PRINT))
2624                 tprinter(c, len);
2625         control = ISCONTROL(unicodep);
2626
2627         /*
2628          * STR sequence must be checked before anything else
2629          * because it uses all following characters until it
2630          * receives a ESC, a SUB, a ST or any other C1 control
2631          * character.
2632          */
2633         if(term.esc & ESC_STR) {
2634                 if(width == 1 &&
2635                    (ascii == '\a' || ascii == 030 ||
2636                     ascii == 032  || ascii == 033 ||
2637                     ISCONTROLC1(unicodep))) {
2638                         term.esc &= ~(ESC_START|ESC_STR);
2639                         term.esc |= ESC_STR_END;
2640                 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2641                         memmove(&strescseq.buf[strescseq.len], c, len);
2642                         strescseq.len += len;
2643                         return;
2644                 } else {
2645                 /*
2646                  * Here is a bug in terminals. If the user never sends
2647                  * some code to stop the str or esc command, then st
2648                  * will stop responding. But this is better than
2649                  * silently failing with unknown characters. At least
2650                  * then users will report back.
2651                  *
2652                  * In the case users ever get fixed, here is the code:
2653                  */
2654                 /*
2655                  * term.esc = 0;
2656                  * strhandle();
2657                  */
2658                         return;
2659                 }
2660         }
2661
2662         /*
2663          * Actions of control codes must be performed as soon they arrive
2664          * because they can be embedded inside a control sequence, and
2665          * they must not cause conflicts with sequences.
2666          */
2667         if(control) {
2668                 tcontrolcode(ascii);
2669                 /*
2670                  * control codes are not shown ever
2671                  */
2672                 return;
2673         } else if(term.esc & ESC_START) {
2674                 if(term.esc & ESC_CSI) {
2675                         csiescseq.buf[csiescseq.len++] = ascii;
2676                         if(BETWEEN(ascii, 0x40, 0x7E)
2677                                         || csiescseq.len >= \
2678                                         sizeof(csiescseq.buf)-1) {
2679                                 term.esc = 0;
2680                                 csiparse();
2681                                 csihandle();
2682                         }
2683                         return;
2684                 } else if(term.esc & ESC_ALTCHARSET) {
2685                         tdeftran(ascii);
2686                 } else if(term.esc & ESC_TEST) {
2687                         tdectest(ascii);
2688                 } else {
2689                         if (!eschandle(ascii))
2690                                 return;
2691                         /* sequence already finished */
2692                 }
2693                 term.esc = 0;
2694                 /*
2695                  * All characters which form part of a sequence are not
2696                  * printed
2697                  */
2698                 return;
2699         }
2700         if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2701                 selclear(NULL);
2702
2703         gp = &term.line[term.c.y][term.c.x];
2704         if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2705                 gp->mode |= ATTR_WRAP;
2706                 tnewline(1);
2707                 gp = &term.line[term.c.y][term.c.x];
2708         }
2709
2710         if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2711                 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2712
2713         if(term.c.x+width > term.col) {
2714                 tnewline(1);
2715                 gp = &term.line[term.c.y][term.c.x];
2716         }
2717
2718         tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2719
2720         if(width == 2) {
2721                 gp->mode |= ATTR_WIDE;
2722                 if(term.c.x+1 < term.col) {
2723                         gp[1].c[0] = '\0';
2724                         gp[1].mode = ATTR_WDUMMY;
2725                 }
2726         }
2727         if(term.c.x+width < term.col) {
2728                 tmoveto(term.c.x+width, term.c.y);
2729         } else {
2730                 term.c.state |= CURSOR_WRAPNEXT;
2731         }
2732 }
2733
2734 void
2735 tresize(int col, int row) {
2736         int i;
2737         int minrow = MIN(row, term.row);
2738         int mincol = MIN(col, term.col);
2739         int slide = term.c.y - row + 1;
2740         bool *bp;
2741         TCursor c;
2742
2743         if(col < 1 || row < 1) {
2744                 fprintf(stderr,
2745                         "tresize: error resizing to %dx%d\n", col, row);
2746                 return;
2747         }
2748
2749         /* free unneeded rows */
2750         i = 0;
2751         if(slide > 0) {
2752                 /*
2753                  * slide screen to keep cursor where we expect it -
2754                  * tscrollup would work here, but we can optimize to
2755                  * memmove because we're freeing the earlier lines
2756                  */
2757                 for(/* i = 0 */; i < slide; i++) {
2758                         free(term.line[i]);
2759                         free(term.alt[i]);
2760                 }
2761                 memmove(term.line, term.line + slide, row * sizeof(Line));
2762                 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2763         }
2764         for(i += row; i < term.row; i++) {
2765                 free(term.line[i]);
2766                 free(term.alt[i]);
2767         }
2768
2769         /* resize to new height */
2770         term.line = xrealloc(term.line, row * sizeof(Line));
2771         term.alt  = xrealloc(term.alt,  row * sizeof(Line));
2772         term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2773         term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2774
2775         /* resize each row to new width, zero-pad if needed */
2776         for(i = 0; i < minrow; i++) {
2777                 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2778                 term.alt[i]  = xrealloc(term.alt[i],  col * sizeof(Glyph));
2779         }
2780
2781         /* allocate any new rows */
2782         for(/* i == minrow */; i < row; i++) {
2783                 term.line[i] = xmalloc(col * sizeof(Glyph));
2784                 term.alt[i] = xmalloc(col * sizeof(Glyph));
2785         }
2786         if(col > term.col) {
2787                 bp = term.tabs + term.col;
2788
2789                 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2790                 while(--bp > term.tabs && !*bp)
2791                         /* nothing */ ;
2792                 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2793                         *bp = 1;
2794         }
2795         /* update terminal size */
2796         term.col = col;
2797         term.row = row;
2798         /* reset scrolling region */
2799         tsetscroll(0, row-1);
2800         /* make use of the LIMIT in tmoveto */
2801         tmoveto(term.c.x, term.c.y);
2802         /* Clearing both screens (it makes dirty all lines) */
2803         c = term.c;
2804         for(i = 0; i < 2; i++) {
2805                 if(mincol < col && 0 < minrow) {
2806                         tclearregion(mincol, 0, col - 1, minrow - 1);
2807                 }
2808                 if(0 < col && minrow < row) {
2809                         tclearregion(0, minrow, col - 1, row - 1);
2810                 }
2811                 tswapscreen();
2812                 tcursor(CURSOR_LOAD);
2813         }
2814         term.c = c;
2815 }
2816
2817 void
2818 xresize(int col, int row) {
2819         xw.tw = MAX(1, col * xw.cw);
2820         xw.th = MAX(1, row * xw.ch);
2821
2822         XFreePixmap(xw.dpy, xw.buf);
2823         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2824                         DefaultDepth(xw.dpy, xw.scr));
2825         XftDrawChange(xw.draw, xw.buf);
2826         xclear(0, 0, xw.w, xw.h);
2827 }
2828
2829 static inline ushort
2830 sixd_to_16bit(int x) {
2831         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2832 }
2833
2834 void
2835 xloadcols(void) {
2836         int i;
2837         XRenderColor color = { .alpha = 0xffff };
2838         static bool loaded;
2839         Color *cp;
2840
2841         if(loaded) {
2842                 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2843                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2844         }
2845
2846         /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2847         for(i = 0; i < LEN(colorname); i++) {
2848                 if(!colorname[i])
2849                         continue;
2850                 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2851                         die("Could not allocate color '%s'\n", colorname[i]);
2852                 }
2853         }
2854
2855         /* load colors [16-231] ; same colors as xterm */
2856         for(i = 16; i < 6*6*6+16; i++) {
2857                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
2858                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2859                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
2860                 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2861                         die("Could not allocate color %d\n", i);
2862         }
2863
2864         /* load colors [232-255] ; grayscale */
2865         for(; i < 256; i++) {
2866                 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2867                 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2868                         die("Could not allocate color %d\n", i);
2869         }
2870         loaded = true;
2871 }
2872
2873 int
2874 xsetcolorname(int x, const char *name) {
2875         XRenderColor color = { .alpha = 0xffff };
2876         Color ncolor;
2877
2878         if(!BETWEEN(x, 0, LEN(colorname)))
2879                 return 1;
2880
2881         if(!name) {
2882                 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2883                         color.red   = sixd_to_16bit( ((x-16)/36)%6 );
2884                         color.green = sixd_to_16bit( ((x-16)/6) %6 );
2885                         color.blue  = sixd_to_16bit( ((x-16)/1) %6 );
2886                         if(!XftColorAllocValue(xw.dpy, xw.vis,
2887                                                 xw.cmap, &color, &ncolor)) {
2888                                 return 1;
2889                         }
2890
2891                         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2892                         dc.col[x] = ncolor;
2893                         return 0;
2894                 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2895                         color.red = color.green = color.blue = \
2896                                     0x0808 + 0x0a0a * (x - (16 + 216));
2897                         if(!XftColorAllocValue(xw.dpy, xw.vis,
2898                                                 xw.cmap, &color, &ncolor)) {
2899                                 return 1;
2900                         }
2901
2902                         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2903                         dc.col[x] = ncolor;
2904                         return 0;
2905                 } else { /* system colors */
2906                         name = colorname[x];
2907                 }
2908         }
2909         if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2910                 return 1;
2911
2912         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2913         dc.col[x] = ncolor;
2914         return 0;
2915 }
2916
2917 void
2918 xtermclear(int col1, int row1, int col2, int row2) {
2919         XftDrawRect(xw.draw,
2920                         &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2921                         borderpx + col1 * xw.cw,
2922                         borderpx + row1 * xw.ch,
2923                         (col2-col1+1) * xw.cw,
2924                         (row2-row1+1) * xw.ch);
2925 }
2926
2927 /*
2928  * Absolute coordinates.
2929  */
2930 void
2931 xclear(int x1, int y1, int x2, int y2) {
2932         XftDrawRect(xw.draw,
2933                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2934                         x1, y1, x2-x1, y2-y1);
2935 }
2936
2937 void
2938 xhints(void) {
2939         XClassHint class = {opt_class ? opt_class : termname, termname};
2940         XWMHints wm = {.flags = InputHint, .input = 1};
2941         XSizeHints *sizeh = NULL;
2942
2943         sizeh = XAllocSizeHints();
2944
2945         sizeh->flags = PSize | PResizeInc | PBaseSize;
2946         sizeh->height = xw.h;
2947         sizeh->width = xw.w;
2948         sizeh->height_inc = xw.ch;
2949         sizeh->width_inc = xw.cw;
2950         sizeh->base_height = 2 * borderpx;
2951         sizeh->base_width = 2 * borderpx;
2952         if(xw.isfixed == True) {
2953                 sizeh->flags |= PMaxSize | PMinSize;
2954                 sizeh->min_width = sizeh->max_width = xw.w;
2955                 sizeh->min_height = sizeh->max_height = xw.h;
2956         }
2957         if(xw.gm & (XValue|YValue)) {
2958                 sizeh->flags |= USPosition | PWinGravity;
2959                 sizeh->x = xw.l;
2960                 sizeh->y = xw.t;
2961                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2962         }
2963
2964         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2965                         &class);
2966         XFree(sizeh);
2967 }
2968
2969 int
2970 xgeommasktogravity(int mask) {
2971         switch(mask & (XNegative|YNegative)) {
2972         case 0:
2973                 return NorthWestGravity;
2974         case XNegative:
2975                 return NorthEastGravity;
2976         case YNegative:
2977                 return SouthWestGravity;
2978         }
2979         return SouthEastGravity;
2980 }
2981
2982 int
2983 xloadfont(Font *f, FcPattern *pattern) {
2984         FcPattern *match;
2985         FcResult result;
2986
2987         match = FcFontMatch(NULL, pattern, &result);
2988         if(!match)
2989                 return 1;
2990
2991         if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2992                 FcPatternDestroy(match);
2993                 return 1;
2994         }
2995
2996         f->set = NULL;
2997         f->pattern = FcPatternDuplicate(pattern);
2998
2999         f->ascent = f->match->ascent;
3000         f->descent = f->match->descent;
3001         f->lbearing = 0;
3002         f->rbearing = f->match->max_advance_width;
3003
3004         f->height = f->ascent + f->descent;
3005         f->width = f->lbearing + f->rbearing;
3006
3007         return 0;
3008 }
3009
3010 void
3011 xloadfonts(char *fontstr, double fontsize) {
3012         FcPattern *pattern;
3013         FcResult r_sz, r_psz;
3014         double fontval;
3015         float ceilf(float);
3016
3017         if(fontstr[0] == '-') {
3018                 pattern = XftXlfdParse(fontstr, False, False);
3019         } else {
3020                 pattern = FcNameParse((FcChar8 *)fontstr);
3021         }
3022
3023         if(!pattern)
3024                 die("st: can't open font %s\n", fontstr);
3025
3026         if(fontsize > 1) {
3027                 FcPatternDel(pattern, FC_PIXEL_SIZE);
3028                 FcPatternDel(pattern, FC_SIZE);
3029                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3030                 usedfontsize = fontsize;
3031         } else {
3032                 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3033                 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3034                 if(r_psz == FcResultMatch) {
3035                         usedfontsize = fontval;
3036                 } else if(r_sz == FcResultMatch) {
3037                         usedfontsize = -1;
3038                 } else {
3039                         /*
3040                          * Default font size is 12, if none given. This is to
3041                          * have a known usedfontsize value.
3042                          */
3043                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3044                         usedfontsize = 12;
3045                 }
3046                 defaultfontsize = usedfontsize;
3047         }
3048
3049         FcConfigSubstitute(0, pattern, FcMatchPattern);
3050         FcDefaultSubstitute(pattern);
3051
3052         if(xloadfont(&dc.font, pattern))
3053                 die("st: can't open font %s\n", fontstr);
3054
3055         if(usedfontsize < 0) {
3056                 FcPatternGetDouble(dc.font.match->pattern,
3057                                    FC_PIXEL_SIZE, 0, &fontval);
3058                 usedfontsize = fontval;
3059                 if(fontsize == 0)
3060                         defaultfontsize = fontval;
3061         }
3062
3063         /* Setting character width and height. */
3064         xw.cw = ceilf(dc.font.width * cwscale);
3065         xw.ch = ceilf(dc.font.height * chscale);
3066
3067         FcPatternDel(pattern, FC_SLANT);
3068         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3069         if(xloadfont(&dc.ifont, pattern))
3070                 die("st: can't open font %s\n", fontstr);
3071
3072         FcPatternDel(pattern, FC_WEIGHT);
3073         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3074         if(xloadfont(&dc.ibfont, pattern))
3075                 die("st: can't open font %s\n", fontstr);
3076
3077         FcPatternDel(pattern, FC_SLANT);
3078         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3079         if(xloadfont(&dc.bfont, pattern))
3080                 die("st: can't open font %s\n", fontstr);
3081
3082         FcPatternDestroy(pattern);
3083 }
3084
3085 int
3086 xloadfontset(Font *f) {
3087         FcResult result;
3088
3089         if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3090                 return 1;
3091         return 0;
3092 }
3093
3094 void
3095 xunloadfont(Font *f) {
3096         XftFontClose(xw.dpy, f->match);
3097         FcPatternDestroy(f->pattern);
3098         if(f->set)
3099                 FcFontSetDestroy(f->set);
3100 }
3101
3102 void
3103 xunloadfonts(void) {
3104         /* Free the loaded fonts in the font cache.  */
3105         while(frclen > 0)
3106                 XftFontClose(xw.dpy, frc[--frclen].font);
3107
3108         xunloadfont(&dc.font);
3109         xunloadfont(&dc.bfont);
3110         xunloadfont(&dc.ifont);
3111         xunloadfont(&dc.ibfont);
3112 }
3113
3114 void
3115 xzoom(const Arg *arg) {
3116         Arg larg;
3117
3118         larg.i = usedfontsize + arg->i;
3119         xzoomabs(&larg);
3120 }
3121
3122 void
3123 xzoomabs(const Arg *arg) {
3124         xunloadfonts();
3125         xloadfonts(usedfont, arg->i);
3126         cresize(0, 0);
3127         redraw();
3128         xhints();
3129 }
3130
3131 void
3132 xzoomreset(const Arg *arg) {
3133         Arg larg;
3134
3135         if(defaultfontsize > 0) {
3136                 larg.i = defaultfontsize;
3137                 xzoomabs(&larg);
3138         }
3139 }
3140
3141 void
3142 xinit(void) {
3143         XGCValues gcvalues;
3144         Cursor cursor;
3145         Window parent;
3146         pid_t thispid = getpid();
3147
3148         if(!(xw.dpy = XOpenDisplay(NULL)))
3149                 die("Can't open display\n");
3150         xw.scr = XDefaultScreen(xw.dpy);
3151         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3152
3153         /* font */
3154         if(!FcInit())
3155                 die("Could not init fontconfig.\n");
3156
3157         usedfont = (opt_font == NULL)? font : opt_font;
3158         xloadfonts(usedfont, 0);
3159
3160         /* colors */
3161         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3162         xloadcols();
3163
3164         /* adjust fixed window geometry */
3165         xw.w = 2 * borderpx + term.col * xw.cw;
3166         xw.h = 2 * borderpx + term.row * xw.ch;
3167         if(xw.gm & XNegative)
3168                 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3169         if(xw.gm & YNegative)
3170                 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3171
3172         /* Events */
3173         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3174         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3175         xw.attrs.bit_gravity = NorthWestGravity;
3176         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3177                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3178                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3179         xw.attrs.colormap = xw.cmap;
3180
3181         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3182                 parent = XRootWindow(xw.dpy, xw.scr);
3183         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3184                         xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3185                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3186                         | CWEventMask | CWColormap, &xw.attrs);
3187
3188         memset(&gcvalues, 0, sizeof(gcvalues));
3189         gcvalues.graphics_exposures = False;
3190         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3191                         &gcvalues);
3192         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3193                         DefaultDepth(xw.dpy, xw.scr));
3194         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3195         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3196
3197         /* Xft rendering context */
3198         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3199
3200         /* input methods */
3201         if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3202                 XSetLocaleModifiers("@im=local");
3203                 if((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3204                         XSetLocaleModifiers("@im=");
3205                         if((xw.xim = XOpenIM(xw.dpy,
3206                                         NULL, NULL, NULL)) == NULL) {
3207                                 die("XOpenIM failed. Could not open input"
3208                                         " device.\n");
3209                         }
3210                 }
3211         }
3212         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3213                                            | XIMStatusNothing, XNClientWindow, xw.win,
3214                                            XNFocusWindow, xw.win, NULL);
3215         if(xw.xic == NULL)
3216                 die("XCreateIC failed. Could not obtain input method.\n");
3217
3218         /* white cursor, black outline */
3219         cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3220         XDefineCursor(xw.dpy, xw.win, cursor);
3221         XRecolorCursor(xw.dpy, cursor,
3222                 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3223                 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3224
3225         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3226         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3227         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3228         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3229
3230         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3231         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3232                         PropModeReplace, (uchar *)&thispid, 1);
3233
3234         xresettitle();
3235         XMapWindow(xw.dpy, xw.win);
3236         xhints();
3237         XSync(xw.dpy, False);
3238 }
3239
3240 void
3241 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3242         int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3243             width = charlen * xw.cw, xp, i;
3244         int frcflags, charexists;
3245         int u8fl, u8fblen, u8cblen, doesexist;
3246         char *u8c, *u8fs;
3247         long unicodep;
3248         Font *font = &dc.font;
3249         FcResult fcres;
3250         FcPattern *fcpattern, *fontpattern;
3251         FcFontSet *fcsets[] = { NULL };
3252         FcCharSet *fccharset;
3253         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3254         XRenderColor colfg, colbg;
3255         XRectangle r;
3256         int oneatatime;
3257
3258         frcflags = FRC_NORMAL;
3259
3260         if(base.mode & ATTR_ITALIC) {
3261                 if(base.fg == defaultfg)
3262                         base.fg = defaultitalic;
3263                 font = &dc.ifont;
3264                 frcflags = FRC_ITALIC;
3265         } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3266                 if(base.fg == defaultfg)
3267                         base.fg = defaultitalic;
3268                 font = &dc.ibfont;
3269                 frcflags = FRC_ITALICBOLD;
3270         } else if(base.mode & ATTR_UNDERLINE) {
3271                 if(base.fg == defaultfg)
3272                         base.fg = defaultunderline;
3273         }
3274
3275         if(IS_TRUECOL(base.fg)) {
3276                 colfg.alpha = 0xffff;
3277                 colfg.red = TRUERED(base.fg);
3278                 colfg.green = TRUEGREEN(base.fg);
3279                 colfg.blue = TRUEBLUE(base.fg);
3280                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3281                 fg = &truefg;
3282         } else {
3283                 fg = &dc.col[base.fg];
3284         }
3285
3286         if(IS_TRUECOL(base.bg)) {
3287                 colbg.alpha = 0xffff;
3288                 colbg.green = TRUEGREEN(base.bg);
3289                 colbg.red = TRUERED(base.bg);
3290                 colbg.blue = TRUEBLUE(base.bg);
3291                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3292                 bg = &truebg;
3293         } else {
3294                 bg = &dc.col[base.bg];
3295         }
3296
3297         if(base.mode & ATTR_BOLD) {
3298                 /*
3299                  * change basic system colors [0-7]
3300                  * to bright system colors [8-15]
3301                  */
3302                 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3303                         fg = &dc.col[base.fg + 8];
3304
3305                 if(base.mode & ATTR_ITALIC) {
3306                         font = &dc.ibfont;
3307                         frcflags = FRC_ITALICBOLD;
3308                 } else {
3309                         font = &dc.bfont;
3310                         frcflags = FRC_BOLD;
3311                 }
3312         }
3313
3314         if(IS_SET(MODE_REVERSE)) {
3315                 if(fg == &dc.col[defaultfg]) {
3316                         fg = &dc.col[defaultbg];
3317                 } else {
3318                         colfg.red = ~fg->color.red;
3319                         colfg.green = ~fg->color.green;
3320                         colfg.blue = ~fg->color.blue;
3321                         colfg.alpha = fg->color.alpha;
3322                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3323                                         &revfg);
3324                         fg = &revfg;
3325                 }
3326
3327                 if(bg == &dc.col[defaultbg]) {
3328                         bg = &dc.col[defaultfg];
3329                 } else {
3330                         colbg.red = ~bg->color.red;
3331                         colbg.green = ~bg->color.green;
3332                         colbg.blue = ~bg->color.blue;
3333                         colbg.alpha = bg->color.alpha;
3334                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3335                                         &revbg);
3336                         bg = &revbg;
3337                 }
3338         }
3339
3340         if(base.mode & ATTR_REVERSE) {
3341                 temp = fg;
3342                 fg = bg;
3343                 bg = temp;
3344         }
3345
3346         if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3347                 colfg.red = fg->color.red / 2;
3348                 colfg.green = fg->color.green / 2;
3349                 colfg.blue = fg->color.blue / 2;
3350                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3351                 fg = &revfg;
3352         }
3353
3354         if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3355                 fg = bg;
3356
3357         if(base.mode & ATTR_INVISIBLE)
3358                 fg = bg;
3359
3360         /* Intelligent cleaning up of the borders. */
3361         if(x == 0) {
3362                 xclear(0, (y == 0)? 0 : winy, borderpx,
3363                         winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3364         }
3365         if(x + charlen >= term.col) {
3366                 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3367                         ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3368         }
3369         if(y == 0)
3370                 xclear(winx, 0, winx + width, borderpx);
3371         if(y == term.row-1)
3372                 xclear(winx, winy + xw.ch, winx + width, xw.h);
3373
3374         /* Clean up the region we want to draw to. */
3375         XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3376
3377         /* Set the clip region because Xft is sometimes dirty. */
3378         r.x = 0;
3379         r.y = 0;
3380         r.height = xw.ch;
3381         r.width = width;
3382         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3383
3384         for(xp = winx; bytelen > 0;) {
3385                 /*
3386                  * Search for the range in the to be printed string of glyphs
3387                  * that are in the main font. Then print that range. If
3388                  * some glyph is found that is not in the font, do the
3389                  * fallback dance.
3390                  */
3391                 u8fs = s;
3392                 u8fblen = 0;
3393                 u8fl = 0;
3394                 oneatatime = font->width != xw.cw;
3395                 for(;;) {
3396                         u8c = s;
3397                         u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3398                         s += u8cblen;
3399                         bytelen -= u8cblen;
3400
3401                         doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3402                         if(doesexist) {
3403                                         u8fl++;
3404                                         u8fblen += u8cblen;
3405                                         if(!oneatatime && bytelen > 0)
3406                                                         continue;
3407                         }
3408
3409                         if(u8fl > 0) {
3410                                 XftDrawStringUtf8(xw.draw, fg,
3411                                                 font->match, xp,
3412                                                 winy + font->ascent,
3413                                                 (FcChar8 *)u8fs,
3414                                                 u8fblen);
3415                                 xp += xw.cw * u8fl;
3416                         }
3417                         break;
3418                 }
3419                 if(doesexist) {
3420                         if(oneatatime)
3421                                 continue;
3422                         break;
3423                 }
3424
3425                 /* Search the font cache. */
3426                 for(i = 0; i < frclen; i++) {
3427                         charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3428                         /* Everything correct. */
3429                         if(charexists && frc[i].flags == frcflags)
3430                                 break;
3431                         /* We got a default font for a not found glyph. */
3432                         if(!charexists && frc[i].flags == frcflags \
3433                                         && frc[i].unicodep == unicodep) {
3434                                 break;
3435                         }
3436                 }
3437
3438                 /* Nothing was found. */
3439                 if(i >= frclen) {
3440                         if(!font->set)
3441                                 xloadfontset(font);
3442                         fcsets[0] = font->set;
3443
3444                         /*
3445                          * Nothing was found in the cache. Now use
3446                          * some dozen of Fontconfig calls to get the
3447                          * font for one single character.
3448                          *
3449                          * Xft and fontconfig are design failures.
3450                          */
3451                         fcpattern = FcPatternDuplicate(font->pattern);
3452                         fccharset = FcCharSetCreate();
3453
3454                         FcCharSetAddChar(fccharset, unicodep);
3455                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
3456                                         fccharset);
3457                         FcPatternAddBool(fcpattern, FC_SCALABLE,
3458                                         FcTrue);
3459
3460                         FcConfigSubstitute(0, fcpattern,
3461                                         FcMatchPattern);
3462                         FcDefaultSubstitute(fcpattern);
3463
3464                         fontpattern = FcFontSetMatch(0, fcsets, 1,
3465                                         fcpattern, &fcres);
3466
3467                         /*
3468                          * Overwrite or create the new cache entry.
3469                          */
3470                         if(frclen >= LEN(frc)) {
3471                                 frclen = LEN(frc) - 1;
3472                                 XftFontClose(xw.dpy, frc[frclen].font);
3473                                 frc[frclen].unicodep = 0;
3474                         }
3475
3476                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
3477                                         fontpattern);
3478                         frc[frclen].flags = frcflags;
3479                         frc[frclen].unicodep = unicodep;
3480
3481                         i = frclen;
3482                         frclen++;
3483
3484                         FcPatternDestroy(fcpattern);
3485                         FcCharSetDestroy(fccharset);
3486                 }
3487
3488                 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3489                                 xp, winy + frc[i].font->ascent,
3490                                 (FcChar8 *)u8c, u8cblen);
3491
3492                 xp += xw.cw * wcwidth(unicodep);
3493         }
3494
3495         /*
3496          * This is how the loop above actually should be. Why does the
3497          * application have to care about font details?
3498          *
3499          * I have to repeat: Xft and Fontconfig are design failures.
3500          */
3501         /*
3502         XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3503                         winy + font->ascent, (FcChar8 *)s, bytelen);
3504         */
3505
3506         if(base.mode & ATTR_UNDERLINE) {
3507                 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3508                                 width, 1);
3509         }
3510
3511         if(base.mode & ATTR_STRUCK) {
3512                 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3513                                 width, 1);
3514         }
3515
3516         /* Reset clip to none. */
3517         XftDrawSetClip(xw.draw, 0);
3518 }
3519
3520 void
3521 xdrawcursor(void) {
3522         static int oldx = 0, oldy = 0;
3523         int sl, width, curx;
3524         Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3525
3526         LIMIT(oldx, 0, term.col-1);
3527         LIMIT(oldy, 0, term.row-1);
3528
3529         curx = term.c.x;
3530
3531         /* adjust position if in dummy */
3532         if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3533                 oldx--;
3534         if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3535                 curx--;
3536
3537         memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3538
3539         /* remove the old cursor */
3540         sl = utf8len(term.line[oldy][oldx].c);
3541         width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3542         xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3543                         oldy, width, sl);
3544
3545         if(IS_SET(MODE_HIDE))
3546                 return;
3547
3548         /* draw the new one */
3549         if(xw.state & WIN_FOCUSED) {
3550                 if(IS_SET(MODE_REVERSE)) {
3551                         g.mode |= ATTR_REVERSE;
3552                         g.fg = defaultcs;
3553                         g.bg = defaultfg;
3554                 }
3555
3556                 sl = utf8len(g.c);
3557                 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3558                         ? 2 : 1;
3559                 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3560         } else {
3561                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3562                                 borderpx + curx * xw.cw,
3563                                 borderpx + term.c.y * xw.ch,
3564                                 xw.cw - 1, 1);
3565                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3566                                 borderpx + curx * xw.cw,
3567                                 borderpx + term.c.y * xw.ch,
3568                                 1, xw.ch - 1);
3569                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3570                                 borderpx + (curx + 1) * xw.cw - 1,
3571                                 borderpx + term.c.y * xw.ch,
3572                                 1, xw.ch - 1);
3573                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3574                                 borderpx + curx * xw.cw,
3575                                 borderpx + (term.c.y + 1) * xw.ch - 1,
3576                                 xw.cw, 1);
3577         }
3578         oldx = curx, oldy = term.c.y;
3579 }
3580
3581
3582 void
3583 xsettitle(char *p) {
3584         XTextProperty prop;
3585
3586         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3587                         &prop);
3588         XSetWMName(xw.dpy, xw.win, &prop);
3589         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3590         XFree(prop.value);
3591 }
3592
3593 void
3594 xresettitle(void) {
3595         xsettitle(opt_title ? opt_title : "st");
3596 }
3597
3598 void
3599 redraw(void) {
3600         tfulldirt();
3601         draw();
3602 }
3603
3604 void
3605 draw(void) {
3606         drawregion(0, 0, term.col, term.row);
3607         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3608                         xw.h, 0, 0);
3609         XSetForeground(xw.dpy, dc.gc,
3610                         dc.col[IS_SET(MODE_REVERSE)?
3611                                 defaultfg : defaultbg].pixel);
3612 }
3613
3614 void
3615 drawregion(int x1, int y1, int x2, int y2) {
3616         int ic, ib, x, y, ox, sl;
3617         Glyph base, new;
3618         char buf[DRAW_BUF_SIZ];
3619         bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3620         long unicodep;
3621
3622         if(!(xw.state & WIN_VISIBLE))
3623                 return;
3624
3625         for(y = y1; y < y2; y++) {
3626                 if(!term.dirty[y])
3627                         continue;
3628
3629                 xtermclear(0, y, term.col, y);
3630                 term.dirty[y] = 0;
3631                 base = term.line[y][0];
3632                 ic = ib = ox = 0;
3633                 for(x = x1; x < x2; x++) {
3634                         new = term.line[y][x];
3635                         if(new.mode == ATTR_WDUMMY)
3636                                 continue;
3637                         if(ena_sel && selected(x, y))
3638                                 new.mode ^= ATTR_REVERSE;
3639                         if(ib > 0 && (ATTRCMP(base, new)
3640                                         || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3641                                 xdraws(buf, base, ox, y, ic, ib);
3642                                 ic = ib = 0;
3643                         }
3644                         if(ib == 0) {
3645                                 ox = x;
3646                                 base = new;
3647                         }
3648
3649                         sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3650                         memcpy(buf+ib, new.c, sl);
3651                         ib += sl;
3652                         ic += (new.mode & ATTR_WIDE)? 2 : 1;
3653                 }
3654                 if(ib > 0)
3655                         xdraws(buf, base, ox, y, ic, ib);
3656         }
3657         xdrawcursor();
3658 }
3659
3660 void
3661 expose(XEvent *ev) {
3662         XExposeEvent *e = &ev->xexpose;
3663
3664         if(xw.state & WIN_REDRAW) {
3665                 if(!e->count)
3666                         xw.state &= ~WIN_REDRAW;
3667         }
3668         redraw();
3669 }
3670
3671 void
3672 visibility(XEvent *ev) {
3673         XVisibilityEvent *e = &ev->xvisibility;
3674
3675         if(e->state == VisibilityFullyObscured) {
3676                 xw.state &= ~WIN_VISIBLE;
3677         } else if(!(xw.state & WIN_VISIBLE)) {
3678                 /* need a full redraw for next Expose, not just a buf copy */
3679                 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3680         }
3681 }
3682
3683 void
3684 unmap(XEvent *ev) {
3685         xw.state &= ~WIN_VISIBLE;
3686 }
3687
3688 void
3689 xsetpointermotion(int set) {
3690         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3691         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3692 }
3693
3694 void
3695 xseturgency(int add) {
3696         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3697
3698         MODBIT(h->flags, add, XUrgencyHint);
3699         XSetWMHints(xw.dpy, xw.win, h);
3700         XFree(h);
3701 }
3702
3703 void
3704 focus(XEvent *ev) {
3705         XFocusChangeEvent *e = &ev->xfocus;
3706
3707         if(e->mode == NotifyGrab)
3708                 return;
3709
3710         if(ev->type == FocusIn) {
3711                 XSetICFocus(xw.xic);
3712                 xw.state |= WIN_FOCUSED;
3713                 xseturgency(0);
3714                 if(IS_SET(MODE_FOCUS))
3715                         ttywrite("\033[I", 3);
3716         } else {
3717                 XUnsetICFocus(xw.xic);
3718                 xw.state &= ~WIN_FOCUSED;
3719                 if(IS_SET(MODE_FOCUS))
3720                         ttywrite("\033[O", 3);
3721         }
3722 }
3723
3724 static inline bool
3725 match(uint mask, uint state) {
3726         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3727 }
3728
3729 void
3730 numlock(const Arg *dummy) {
3731         term.numlock ^= 1;
3732 }
3733
3734 char*
3735 kmap(KeySym k, uint state) {
3736         Key *kp;
3737         int i;
3738
3739         /* Check for mapped keys out of X11 function keys. */
3740         for(i = 0; i < LEN(mappedkeys); i++) {
3741                 if(mappedkeys[i] == k)
3742                         break;
3743         }
3744         if(i == LEN(mappedkeys)) {
3745                 if((k & 0xFFFF) < 0xFD00)
3746                         return NULL;
3747         }
3748
3749         for(kp = key; kp < key + LEN(key); kp++) {
3750                 if(kp->k != k)
3751                         continue;
3752
3753                 if(!match(kp->mask, state))
3754                         continue;
3755
3756                 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3757                         continue;
3758                 if(term.numlock && kp->appkey == 2)
3759                         continue;
3760
3761                 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3762                         continue;
3763
3764                 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3765                         continue;
3766
3767                 return kp->s;
3768         }
3769
3770         return NULL;
3771 }
3772
3773 void
3774 kpress(XEvent *ev) {
3775         XKeyEvent *e = &ev->xkey;
3776         KeySym ksym;
3777         char buf[32], *customkey;
3778         int len;
3779         long c;
3780         Status status;
3781         Shortcut *bp;
3782
3783         if(IS_SET(MODE_KBDLOCK))
3784                 return;
3785
3786         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3787         /* 1. shortcuts */
3788         for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3789                 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3790                         bp->func(&(bp->arg));
3791                         return;
3792                 }
3793         }
3794
3795         /* 2. custom keys from config.h */
3796         if((customkey = kmap(ksym, e->state))) {
3797                 ttysend(customkey, strlen(customkey));
3798                 return;
3799         }
3800
3801         /* 3. composed string from input method */
3802         if(len == 0)
3803                 return;
3804         if(len == 1 && e->state & Mod1Mask) {
3805                 if(IS_SET(MODE_8BIT)) {
3806                         if(*buf < 0177) {
3807                                 c = *buf | 0x80;
3808                                 len = utf8encode(c, buf, UTF_SIZ);
3809                         }
3810                 } else {
3811                         buf[1] = buf[0];
3812                         buf[0] = '\033';
3813                         len = 2;
3814                 }
3815         }
3816         ttysend(buf, len);
3817 }
3818
3819
3820 void
3821 cmessage(XEvent *e) {
3822         /*
3823          * See xembed specs
3824          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3825          */
3826         if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3827                 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3828                         xw.state |= WIN_FOCUSED;
3829                         xseturgency(0);
3830                 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3831                         xw.state &= ~WIN_FOCUSED;
3832                 }
3833         } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3834                 /* Send SIGHUP to shell */
3835                 kill(pid, SIGHUP);
3836                 exit(EXIT_SUCCESS);
3837         }
3838 }
3839
3840 void
3841 cresize(int width, int height) {
3842         int col, row;
3843
3844         if(width != 0)
3845                 xw.w = width;
3846         if(height != 0)
3847                 xw.h = height;
3848
3849         col = (xw.w - 2 * borderpx) / xw.cw;
3850         row = (xw.h - 2 * borderpx) / xw.ch;
3851
3852         tresize(col, row);
3853         xresize(col, row);
3854         ttyresize();
3855 }
3856
3857 void
3858 resize(XEvent *e) {
3859         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3860                 return;
3861
3862         cresize(e->xconfigure.width, e->xconfigure.height);
3863 }
3864
3865 void
3866 run(void) {
3867         XEvent ev;
3868         int w = xw.w, h = xw.h;
3869         fd_set rfd;
3870         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3871         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3872         long deltatime;
3873
3874         /* Waiting for window mapping */
3875         while(1) {
3876                 XNextEvent(xw.dpy, &ev);
3877                 if(XFilterEvent(&ev, None))
3878                         continue;
3879                 if(ev.type == ConfigureNotify) {
3880                         w = ev.xconfigure.width;
3881                         h = ev.xconfigure.height;
3882                 } else if(ev.type == MapNotify) {
3883                         break;
3884                 }
3885         }
3886
3887         ttynew();
3888         cresize(w, h);
3889
3890         clock_gettime(CLOCK_MONOTONIC, &last);
3891         lastblink = last;
3892
3893         for(xev = actionfps;;) {
3894                 FD_ZERO(&rfd);
3895                 FD_SET(cmdfd, &rfd);
3896                 FD_SET(xfd, &rfd);
3897
3898                 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3899                         if(errno == EINTR)
3900                                 continue;
3901                         die("select failed: %s\n", strerror(errno));
3902                 }
3903                 if(FD_ISSET(cmdfd, &rfd)) {
3904                         ttyread();
3905                         if(blinktimeout) {
3906                                 blinkset = tattrset(ATTR_BLINK);
3907                                 if(!blinkset)
3908                                         MODBIT(term.mode, 0, MODE_BLINK);
3909                         }
3910                 }
3911
3912                 if(FD_ISSET(xfd, &rfd))
3913                         xev = actionfps;
3914
3915                 clock_gettime(CLOCK_MONOTONIC, &now);
3916                 drawtimeout.tv_sec = 0;
3917                 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3918                 tv = &drawtimeout;
3919
3920                 dodraw = 0;
3921                 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3922                         tsetdirtattr(ATTR_BLINK);
3923                         term.mode ^= MODE_BLINK;
3924                         lastblink = now;
3925                         dodraw = 1;
3926                 }
3927                 deltatime = TIMEDIFF(now, last);
3928                 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3929                                 || deltatime < 0) {
3930                         dodraw = 1;
3931                         last = now;
3932                 }
3933
3934                 if(dodraw) {
3935                         while(XPending(xw.dpy)) {
3936                                 XNextEvent(xw.dpy, &ev);
3937                                 if(XFilterEvent(&ev, None))
3938                                         continue;
3939                                 if(handler[ev.type])
3940                                         (handler[ev.type])(&ev);
3941                         }
3942
3943                         draw();
3944                         XFlush(xw.dpy);
3945
3946                         if(xev && !FD_ISSET(xfd, &rfd))
3947                                 xev--;
3948                         if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3949                                 if(blinkset) {
3950                                         if(TIMEDIFF(now, lastblink) \
3951                                                         > blinktimeout) {
3952                                                 drawtimeout.tv_nsec = 1000;
3953                                         } else {
3954                                                 drawtimeout.tv_nsec = (1E6 * \
3955                                                         (blinktimeout - \
3956                                                         TIMEDIFF(now,
3957                                                                 lastblink)));
3958                                         }
3959                                         drawtimeout.tv_sec = \
3960                                             drawtimeout.tv_nsec / 1E9;
3961                                         drawtimeout.tv_nsec %= (long)1E9;
3962                                 } else {
3963                                         tv = NULL;
3964                                 }
3965                         }
3966                 }
3967         }
3968 }
3969
3970 void
3971 usage(void) {
3972         die("%s " VERSION " (c) 2010-2015 st engineers\n" \
3973         "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3974         "          [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3975 }
3976
3977 int
3978 main(int argc, char *argv[]) {
3979         char *titles;
3980         uint cols = 80, rows = 24;
3981
3982         xw.l = xw.t = 0;
3983         xw.isfixed = False;
3984
3985         ARGBEGIN {
3986         case 'a':
3987                 allowaltscreen = false;
3988                 break;
3989         case 'c':
3990                 opt_class = EARGF(usage());
3991                 break;
3992         case 'e':
3993                 /* eat all remaining arguments */
3994                 if(argc > 1) {
3995                         opt_cmd = &argv[1];
3996                         if(argv[1] != NULL && opt_title == NULL) {
3997                                 titles = xstrdup(argv[1]);
3998                                 opt_title = basename(titles);
3999                         }
4000                 }
4001                 goto run;
4002         case 'f':
4003                 opt_font = EARGF(usage());
4004                 break;
4005         case 'g':
4006                 xw.gm = XParseGeometry(EARGF(usage()),
4007                                 &xw.l, &xw.t, &cols, &rows);
4008                 break;
4009         case 'i':
4010                 xw.isfixed = True;
4011                 break;
4012         case 'o':
4013                 opt_io = EARGF(usage());
4014                 break;
4015         case 't':
4016                 opt_title = EARGF(usage());
4017                 break;
4018         case 'w':
4019                 opt_embed = EARGF(usage());
4020                 break;
4021         case 'v':
4022         default:
4023                 usage();
4024         } ARGEND;
4025
4026 run:
4027         setlocale(LC_CTYPE, "");
4028         XSetLocaleModifiers("");
4029         tnew(cols? cols : 1, rows? rows : 1);
4030         xinit();
4031         selinit();
4032         run();
4033
4034         return 0;
4035 }
4036