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 <sys/ioctl.h>
  15 #include <sys/select.h>
  16 #include <sys/stat.h>
  17 #include <sys/time.h>
  18 #include <sys/types.h>
  19 #include <sys/wait.h>
  20 #include <time.h>
  21 #include <unistd.h>
  22 #include <X11/Xatom.h>
  23 #include <X11/Xlib.h>
  24 #include <X11/Xutil.h>
  25 #include <X11/cursorfont.h>
  26 #include <X11/keysym.h>
  27 #include <X11/Xft/Xft.h>
  28 #include <fontconfig/fontconfig.h>
  29
  30 #define Glyph Glyph_
  31 #define Font Font_
  32 #define Draw XftDraw *
  33 #define Colour XftColor
  34 #define Colourmap Colormap
  35
  36 #if   defined(__linux)
  37  #include <pty.h>
  38 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  39  #include <util.h>
  40 #elif defined(__FreeBSD__) || defined(__DragonFly__)
  41  #include <libutil.h>
  42 #endif
  43
  44 #define USAGE \
  45         "st " VERSION " (c) 2010-2013 st engineers\n" \
  46         "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
  47         " [-t title] [-w windowid] [-e command ...]\n"
  48
  49 /* XEMBED messages */
  50 #define XEMBED_FOCUS_IN  4
  51 #define XEMBED_FOCUS_OUT 5
  52
  53 /* Arbitrary sizes */
  54 #define UTF_SIZ       4
  55 #define ESC_BUF_SIZ   (128*UTF_SIZ)
  56 #define ESC_ARG_SIZ   16
  57 #define STR_BUF_SIZ   ESC_BUF_SIZ
  58 #define STR_ARG_SIZ   ESC_ARG_SIZ
  59 #define DRAW_BUF_SIZ  20*1024
  60 #define XK_ANY_MOD    UINT_MAX
  61 #define XK_NO_MOD     0
  62 #define XK_SWITCH_MOD (1<<13)
  63
  64 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
  65
  66 /* macros */
  67 #define SERRNO strerror(errno)
  68 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
  69 #define MAX(a, b)  ((a) < (b) ? (b) : (a))
  70 #define LEN(a)     (sizeof(a) / sizeof(a[0]))
  71 #define DEFAULT(a, b)     (a) = (a) ? (a) : (b)
  72 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
  73 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  74 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  75 #define IS_SET(flag) ((term.mode & (flag)) != 0)
  76 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
  77
  78 #define VT102ID "\033[?6c"
  79
  80 enum glyph_attribute {
  81         ATTR_NULL      = 0,
  82         ATTR_REVERSE   = 1,
  83         ATTR_UNDERLINE = 2,
  84         ATTR_BOLD      = 4,
  85         ATTR_GFX       = 8,
  86         ATTR_ITALIC    = 16,
  87         ATTR_BLINK     = 32,
  88 };
  89
  90 enum cursor_movement {
  91         CURSOR_SAVE,
  92         CURSOR_LOAD
  93 };
  94
  95 enum cursor_state {
  96         CURSOR_DEFAULT  = 0,
  97         CURSOR_WRAPNEXT = 1,
  98         CURSOR_ORIGIN   = 2
  99 };
 100
 101 enum glyph_state {
 102         GLYPH_SET   = 1,
 103         GLYPH_DIRTY = 2
 104 };
 105
 106 enum term_mode {
 107         MODE_WRAP        = 1,
 108         MODE_INSERT      = 2,
 109         MODE_APPKEYPAD   = 4,
 110         MODE_ALTSCREEN   = 8,
 111         MODE_CRLF        = 16,
 112         MODE_MOUSEBTN    = 32,
 113         MODE_MOUSEMOTION = 64,
 114         MODE_MOUSE       = 32|64,
 115         MODE_REVERSE     = 128,
 116         MODE_KBDLOCK     = 256,
 117         MODE_HIDE        = 512,
 118         MODE_ECHO        = 1024,
 119         MODE_APPCURSOR   = 2048,
 120         MODE_MOUSESGR    = 4096,
 121 };
 122
 123 enum escape_state {
 124         ESC_START      = 1,
 125         ESC_CSI = 2,
 126         ESC_STR = 4, /* DSC, OSC, PM, APC */
 127         ESC_ALTCHARSET = 8,
 128         ESC_STR_END    = 16, /* a final string was encountered */
 129         ESC_TEST       = 32, /* Enter in test mode */
 130 };
 131
 132 enum window_state {
 133         WIN_VISIBLE = 1,
 134         WIN_REDRAW  = 2,
 135         WIN_FOCUSED = 4
 136 };
 137
 138 enum selection_type {
 139         SEL_REGULAR = 1,
 140         SEL_RECTANGULAR = 2
 141 };
 142
 143 /* bit macro */
 144 #undef B0
 145 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
 146
 147 typedef unsigned char uchar;
 148 typedef unsigned int uint;
 149 typedef unsigned long ulong;
 150 typedef unsigned short ushort;
 151
 152 typedef struct {
 153         char c[UTF_SIZ];     /* character code */
 154         uchar mode;  /* attribute flags */
 155         ushort fg;   /* foreground  */
 156         ushort bg;   /* background  */
 157         uchar state; /* state flags    */
 158 } Glyph;
 159
 160 typedef Glyph *Line;
 161
 162 typedef struct {
 163         Glyph attr;      /* current char attributes */
 164         int x;
 165         int y;
 166         char state;
 167 } TCursor;
 168
 169 /* CSI Escape sequence structs */
 170 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
 171 typedef struct {
 172         char buf[ESC_BUF_SIZ]; /* raw string */
 173         int len;               /* raw string length */
 174         char priv;
 175         int arg[ESC_ARG_SIZ];
 176         int narg;              /* nb of args */
 177         char mode;
 178 } CSIEscape;
 179
 180 /* STR Escape sequence structs */
 181 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
 182 typedef struct {
 183         char type;           /* ESC type ... */
 184         char buf[STR_BUF_SIZ]; /* raw string */
 185         int len;               /* raw string length */
 186         char *args[STR_ARG_SIZ];
 187         int narg;             /* nb of args */
 188 } STREscape;
 189
 190 /* Internal representation of the screen */
 191 typedef struct {
 192         int row;        /* nb row */
 193         int col;        /* nb col */
 194         Line *line;     /* screen */
 195         Line *alt;      /* alternate screen */
 196         bool *dirty;    /* dirtyness of lines */
 197         TCursor c;      /* cursor */
 198         int top;        /* top    scroll limit */
 199         int bot;        /* bottom scroll limit */
 200         int mode;       /* terminal mode flags */
 201         int esc;        /* escape state flags */
 202         bool numlock;   /* lock numbers in keyboard */
 203         bool *tabs;
 204 } Term;
 205
 206 /* Purely graphic info */
 207 typedef struct {
 208         Display *dpy;
 209         Colourmap cmap;
 210         Window win;
 211         Drawable buf;
 212         Atom xembed, wmdeletewin;
 213         XIM xim;
 214         XIC xic;
 215         Draw draw;
 216         Visual *vis;
 217         int scr;
 218         bool isfixed; /* is fixed geometry? */
 219         int fx, fy, fw, fh; /* fixed geometry */
 220         int tw, th; /* tty width and height */
 221         int w, h; /* window width and height */
 222         int ch; /* char height */
 223         int cw; /* char width  */
 224         char state; /* focus, redraw, visible */
 225 } XWindow;
 226
 227 typedef struct {
 228         KeySym k;
 229         uint mask;
 230         char s[ESC_BUF_SIZ];
 231         /* three valued logic variables: 0 indifferent, 1 on, -1 off */
 232         signed char appkey;             /* application keypad */
 233         signed char appcursor;          /* application cursor */
 234         signed char crlf;               /* crlf mode          */
 235 } Key;
 236
 237 /* TODO: use better name for vars... */
 238 typedef struct {
 239         int mode;
 240         int type;
 241         int bx, by;
 242         int ex, ey;
 243         struct {
 244                 int x, y;
 245         } b, e;
 246         char *clip;
 247         Atom xtarget;
 248         bool alt;
 249         struct timeval tclick1;
 250         struct timeval tclick2;
 251 } Selection;
 252
 253 typedef union {
 254         int i;
 255         unsigned int ui;
 256         float f;
 257         const void *v;
 258 } Arg;
 259
 260 typedef struct {
 261         unsigned int mod;
 262         KeySym keysym;
 263         void (*func)(const Arg *);
 264         const Arg arg;
 265 } Shortcut;
 266
 267 /* function definitions used in config.h */
 268 static void clippaste(const Arg *);
 269 static void numlock(const Arg *);
 270 static void selpaste(const Arg *);
 271 static void xzoom(const Arg *);
 272
 273 /* Config.h for applying patches and the configuration. */
 274 #include "config.h"
 275
 276 /* Font structure */
 277 typedef struct {
 278         int height;
 279         int width;
 280         int ascent;
 281         int descent;
 282         short lbearing;
 283         short rbearing;
 284         XftFont *match;
 285         FcFontSet *set;
 286         FcPattern *pattern;
 287 } Font;
 288
 289 /* Drawing Context */
 290 typedef struct {
 291         Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
 292         Font font, bfont, ifont, ibfont;
 293         GC gc;
 294 } DC;
 295
 296 static void die(const char *, ...);
 297 static void draw(void);
 298 static void redraw(int);
 299 static void drawregion(int, int, int, int);
 300 static void execsh(void);
 301 static void sigchld(int);
 302 static void run(void);
 303
 304 static void csidump(void);
 305 static void csihandle(void);
 306 static void csiparse(void);
 307 static void csireset(void);
 308 static void strdump(void);
 309 static void strhandle(void);
 310 static void strparse(void);
 311 static void strreset(void);
 312
 313 static void tclearregion(int, int, int, int, int);
 314 static void tcursor(int);
 315 static void tdeletechar(int);
 316 static void tdeleteline(int);
 317 static void tinsertblank(int);
 318 static void tinsertblankline(int);
 319 static void tmoveto(int, int);
 320 static void tmoveato(int x, int y);
 321 static void tnew(int, int);
 322 static void tnewline(int);
 323 static void tputtab(bool);
 324 static void tputc(char *, int);
 325 static void treset(void);
 326 static int tresize(int, int);
 327 static void tscrollup(int, int);
 328 static void tscrolldown(int, int);
 329 static void tsetattr(int*, int);
 330 static void tsetchar(char *, Glyph *, int, int);
 331 static void tsetscroll(int, int);
 332 static void tswapscreen(void);
 333 static void tsetdirt(int, int);
 334 static void tsetmode(bool, bool, int *, int);
 335 static void tfulldirt(void);
 336 static void techo(char *, int);
 337
 338 static inline bool match(uint, uint);
 339 static void ttynew(void);
 340 static void ttyread(void);
 341 static void ttyresize(void);
 342 static void ttywrite(const char *, size_t);
 343
 344 static void xdraws(char *, Glyph, int, int, int, int);
 345 static void xhints(void);
 346 static void xclear(int, int, int, int);
 347 static void xdrawcursor(void);
 348 static void xinit(void);
 349 static void xloadcols(void);
 350 static int xsetcolorname(int, const char *);
 351 static int xloadfont(Font *, FcPattern *);
 352 static void xloadfonts(char *, int);
 353 static void xsettitle(char *);
 354 static void xresettitle(void);
 355 static void xseturgency(int);
 356 static void xsetsel(char*);
 357 static void xtermclear(int, int, int, int);
 358 static void xunloadfonts(void);
 359 static void xresize(int, int);
 360
 361 static void expose(XEvent *);
 362 static void visibility(XEvent *);
 363 static void unmap(XEvent *);
 364 static char *kmap(KeySym, uint);
 365 static void kpress(XEvent *);
 366 static void cmessage(XEvent *);
 367 static void cresize(int, int);
 368 static void resize(XEvent *);
 369 static void focus(XEvent *);
 370 static void brelease(XEvent *);
 371 static void bpress(XEvent *);
 372 static void bmotion(XEvent *);
 373 static void selnotify(XEvent *);
 374 static void selclear(XEvent *);
 375 static void selrequest(XEvent *);
 376
 377 static void selinit(void);
 378 static inline bool selected(int, int);
 379 static void selcopy(void);
 380 static void selscroll(int, int);
 381
 382 static int utf8decode(char *, long *);
 383 static int utf8encode(long *, char *);
 384 static int utf8size(char *);
 385 static int isfullutf8(char *, int);
 386
 387 static ssize_t xwrite(int, char *, size_t);
 388 static void *xmalloc(size_t);
 389 static void *xrealloc(void *, size_t);
 390 static void *xcalloc(size_t, size_t);
 391
 392 static void (*handler[LASTEvent])(XEvent *) = {
 393         [KeyPress] = kpress,
 394         [ClientMessage] = cmessage,
 395         [ConfigureNotify] = resize,
 396         [VisibilityNotify] = visibility,
 397         [UnmapNotify] = unmap,
 398         [Expose] = expose,
 399         [FocusIn] = focus,
 400         [FocusOut] = focus,
 401         [MotionNotify] = bmotion,
 402         [ButtonPress] = bpress,
 403         [ButtonRelease] = brelease,
 404         [SelectionClear] = selclear,
 405         [SelectionNotify] = selnotify,
 406         [SelectionRequest] = selrequest,
 407 };
 408
 409 /* Globals */
 410 static DC dc;
 411 static XWindow xw;
 412 static Term term;
 413 static CSIEscape csiescseq;
 414 static STREscape strescseq;
 415 static int cmdfd;
 416 static pid_t pid;
 417 static Selection sel;
 418 static int iofd = -1;
 419 static char **opt_cmd = NULL;
 420 static char *opt_io = NULL;
 421 static char *opt_title = NULL;
 422 static char *opt_embed = NULL;
 423 static char *opt_class = NULL;
 424 static char *opt_font = NULL;
 425
 426 static char *usedfont = NULL;
 427 static int usedfontsize = 0;
 428
 429 /* Font Ring Cache */
 430 enum {
 431         FRC_NORMAL,
 432         FRC_ITALIC,
 433         FRC_BOLD,
 434         FRC_ITALICBOLD
 435 };
 436
 437 typedef struct {
 438         XftFont *font;
 439         long c;
 440         int flags;
 441 } Fontcache;
 442
 443 /*
 444  * Fontcache is a ring buffer, with frccur as current position and frclen as
 445  * the current length of used elements.
 446  */
 447
 448 static Fontcache frc[1024];
 449 static int frccur = -1, frclen = 0;
 450
 451 ssize_t
 452 xwrite(int fd, char *s, size_t len) {
 453         size_t aux = len;
 454
 455         while(len > 0) {
 456                 ssize_t r = write(fd, s, len);
 457                 if(r < 0)
 458                         return r;
 459                 len -= r;
 460                 s += r;
 461         }
 462         return aux;
 463 }
 464
 465 void *
 466 xmalloc(size_t len) {
 467         void *p = malloc(len);
 468
 469         if(!p)
 470                 die("Out of memory\n");
 471
 472         return p;
 473 }
 474
 475 void *
 476 xrealloc(void *p, size_t len) {
 477         if((p = realloc(p, len)) == NULL)
 478                 die("Out of memory\n");
 479
 480         return p;
 481 }
 482
 483 void *
 484 xcalloc(size_t nmemb, size_t size) {
 485         void *p = calloc(nmemb, size);
 486
 487         if(!p)
 488                 die("Out of memory\n");
 489
 490         return p;
 491 }
 492
 493 int
 494 utf8decode(char *s, long *u) {
 495         uchar c;
 496         int i, n, rtn;
 497
 498         rtn = 1;
 499         c = *s;
 500         if(~c & B7) { /* 0xxxxxxx */
 501                 *u = c;
 502                 return rtn;
 503         } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
 504                 *u = c&(B4|B3|B2|B1|B0);
 505                 n = 1;
 506         } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
 507                 *u = c&(B3|B2|B1|B0);
 508                 n = 2;
 509         } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
 510                 *u = c & (B2|B1|B0);
 511                 n = 3;
 512         } else {
 513                 goto invalid;
 514         }
 515
 516         for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
 517                 c = *s;
 518                 if((c & (B7|B6)) != B7) /* 10xxxxxx */
 519                         goto invalid;
 520                 *u <<= 6;
 521                 *u |= c & (B5|B4|B3|B2|B1|B0);
 522         }
 523
 524         if((n == 1 && *u < 0x80) ||
 525            (n == 2 && *u < 0x800) ||
 526            (n == 3 && *u < 0x10000) ||
 527            (*u >= 0xD800 && *u <= 0xDFFF)) {
 528                 goto invalid;
 529         }
 530
 531         return rtn;
 532 invalid:
 533         *u = 0xFFFD;
 534
 535         return rtn;
 536 }
 537
 538 int
 539 utf8encode(long *u, char *s) {
 540         uchar *sp;
 541         ulong uc;
 542         int i, n;
 543
 544         sp = (uchar *)s;
 545         uc = *u;
 546         if(uc < 0x80) {
 547                 *sp = uc; /* 0xxxxxxx */
 548                 return 1;
 549         } else if(*u < 0x800) {
 550                 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
 551                 n = 1;
 552         } else if(uc < 0x10000) {
 553                 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
 554                 n = 2;
 555         } else if(uc <= 0x10FFFF) {
 556                 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
 557                 n = 3;
 558         } else {
 559                 goto invalid;
 560         }
 561
 562         for(i=n,++sp; i>0; --i,++sp)
 563                 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
 564
 565         return n+1;
 566 invalid:
 567         /* U+FFFD */
 568         *s++ = '\xEF';
 569         *s++ = '\xBF';
 570         *s = '\xBD';
 571
 572         return 3;
 573 }
 574
 575 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
 576    UTF-8 otherwise return 0 */
 577 int
 578 isfullutf8(char *s, int b) {
 579         uchar *c1, *c2, *c3;
 580
 581         c1 = (uchar *)s;
 582         c2 = (uchar *)++s;
 583         c3 = (uchar *)++s;
 584         if(b < 1) {
 585                 return 0;
 586         } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
 587                 return 0;
 588         } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
 589             ((b == 1) ||
 590             ((b == 2) && (*c2&(B7|B6)) == B7))) {
 591                 return 0;
 592         } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
 593             ((b == 1) ||
 594             ((b == 2) && (*c2&(B7|B6)) == B7) ||
 595             ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
 596                 return 0;
 597         } else {
 598                 return 1;
 599         }
 600 }
 601
 602 int
 603 utf8size(char *s) {
 604         uchar c = *s;
 605
 606         if(~c&B7) {
 607                 return 1;
 608         } else if((c&(B7|B6|B5)) == (B7|B6)) {
 609                 return 2;
 610         } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
 611                 return 3;
 612         } else {
 613                 return 4;
 614         }
 615 }
 616
 617 void
 618 selinit(void) {
 619         memset(&sel.tclick1, 0, sizeof(sel.tclick1));
 620         memset(&sel.tclick2, 0, sizeof(sel.tclick2));
 621         sel.mode = 0;
 622         sel.bx = -1;
 623         sel.clip = NULL;
 624         sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
 625         if(sel.xtarget == None)
 626                 sel.xtarget = XA_STRING;
 627 }
 628
 629 static int
 630 x2col(int x) {
 631         x -= borderpx;
 632         x /= xw.cw;
 633
 634         return LIMIT(x, 0, term.col-1);
 635 }
 636
 637 static int
 638 y2row(int y) {
 639         y -= borderpx;
 640         y /= xw.ch;
 641
 642         return LIMIT(y, 0, term.row-1);
 643 }
 644
 645 static inline bool
 646 selected(int x, int y) {
 647         int bx, ex;
 648
 649         if(sel.ey == y && sel.by == y) {
 650                 bx = MIN(sel.bx, sel.ex);
 651                 ex = MAX(sel.bx, sel.ex);
 652                 return BETWEEN(x, bx, ex);
 653         }
 654
 655         return ((sel.b.y < y && y < sel.e.y)
 656                         || (y == sel.e.y && x <= sel.e.x))
 657                         || (y == sel.b.y && x >= sel.b.x
 658                                 && (x <= sel.e.x || sel.b.y != sel.e.y));
 659         switch(sel.type) {
 660         case SEL_REGULAR:
 661                 return ((sel.b.y < y && y < sel.e.y)
 662                         || (y == sel.e.y && x <= sel.e.x))
 663                         || (y == sel.b.y && x >= sel.b.x
 664                                 && (x <= sel.e.x || sel.b.y != sel.e.y));
 665         case SEL_RECTANGULAR:
 666                 return ((sel.b.y <= y && y <= sel.e.y)
 667                         && (sel.b.x <= x && x <= sel.e.x));
 668         };
 669 }
 670
 671 void
 672 getbuttoninfo(XEvent *e) {
 673         int type;
 674         uint state = e->xbutton.state &~Button1Mask;
 675
 676         sel.alt = IS_SET(MODE_ALTSCREEN);
 677
 678         sel.ex = x2col(e->xbutton.x);
 679         sel.ey = y2row(e->xbutton.y);
 680
 681         sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
 682         sel.b.y = MIN(sel.by, sel.ey);
 683         sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
 684         sel.e.y = MAX(sel.by, sel.ey);
 685
 686         sel.type = SEL_REGULAR;
 687         for(type = 1; type < LEN(selmasks); ++type) {
 688                 if(match(selmasks[type], state)) {
 689                         sel.type = type;
 690                         break;
 691                 }
 692         }
 693 }
 694
 695 void
 696 mousereport(XEvent *e) {
 697         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 698             button = e->xbutton.button, state = e->xbutton.state,
 699             len;
 700         char buf[40];
 701         static int ob, ox, oy;
 702
 703         /* from urxvt */
 704         if(e->xbutton.type == MotionNotify) {
 705                 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
 706                         return;
 707                 button = ob + 32;
 708                 ox = x, oy = y;
 709         } else if(!IS_SET(MODE_MOUSESGR)
 710                         && (e->xbutton.type == ButtonRelease
 711                                 || button == AnyButton)) {
 712                 button = 3;
 713         } else {
 714                 button -= Button1;
 715                 if(button >= 3)
 716                         button += 64 - 3;
 717                 if(e->xbutton.type == ButtonPress) {
 718                         ob = button;
 719                         ox = x, oy = y;
 720                 }
 721         }
 722
 723         button += (state & ShiftMask   ? 4  : 0)
 724                 + (state & Mod4Mask    ? 8  : 0)
 725                 + (state & ControlMask ? 16 : 0);
 726
 727         len = 0;
 728         if(IS_SET(MODE_MOUSESGR)) {
 729                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 730                                 button, x+1, y+1,
 731                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 732         } else if(x < 223 && y < 223) {
 733                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 734                                 32+button, 32+x+1, 32+y+1);
 735         } else {
 736                 return;
 737         }
 738
 739         ttywrite(buf, len);
 740 }
 741
 742 void
 743 bpress(XEvent *e) {
 744         if(IS_SET(MODE_MOUSE)) {
 745                 mousereport(e);
 746         } else if(e->xbutton.button == Button1) {
 747                 if(sel.bx != -1) {
 748                         sel.bx = -1;
 749                         tsetdirt(sel.b.y, sel.e.y);
 750                         draw();
 751                 }
 752                 sel.mode = 1;
 753                 sel.type = SEL_REGULAR;
 754                 sel.ex = sel.bx = x2col(e->xbutton.x);
 755                 sel.ey = sel.by = y2row(e->xbutton.y);
 756         } else if(e->xbutton.button == Button4) {
 757                 ttywrite("\031", 1);
 758         } else if(e->xbutton.button == Button5) {
 759                 ttywrite("\005", 1);
 760         }
 761 }
 762
 763 void
 764 selcopy(void) {
 765         char *str, *ptr, *p;
 766         int x, y, bufsize, is_selected = 0, size;
 767         Glyph *gp, *last;
 768
 769         if(sel.bx == -1) {
 770                 str = NULL;
 771         } else {
 772                 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
 773                 ptr = str = xmalloc(bufsize);
 774
 775                 /* append every set & selected glyph to the selection */
 776                 for(y = sel.b.y; y < sel.e.y + 1; y++) {
 777                         is_selected = 0;
 778                         gp = &term.line[y][0];
 779                         last = gp + term.col;
 780
 781                         while(--last >= gp && !(last->state & GLYPH_SET))
 782                                 /* nothing */;
 783
 784                         for(x = 0; gp <= last; x++, ++gp) {
 785                                 if(!selected(x, y)) {
 786                                         continue;
 787                                 } else {
 788                                         is_selected = 1;
 789                                 }
 790
 791                                 p = (gp->state & GLYPH_SET) ? gp->c : " ";
 792                                 size = utf8size(p);
 793                                 memcpy(ptr, p, size);
 794                                 ptr += size;
 795                         }
 796                         /* \n at the end of every selected line except for the last one */
 797                         if(is_selected && y < sel.e.y)
 798                                 *ptr++ = '\r';
 799                 }
 800                 *ptr = 0;
 801         }
 802         xsetsel(str);
 803 }
 804
 805 void
 806 selnotify(XEvent *e) {
 807         ulong nitems, ofs, rem;
 808         int format;
 809         uchar *data;
 810         Atom type;
 811
 812         ofs = 0;
 813         do {
 814                 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
 815                                         False, AnyPropertyType, &type, &format,
 816                                         &nitems, &rem, &data)) {
 817                         fprintf(stderr, "Clipboard allocation failed\n");
 818                         return;
 819                 }
 820                 ttywrite((const char *) data, nitems * format / 8);
 821                 XFree(data);
 822                 /* number of 32-bit chunks returned */
 823                 ofs += nitems * format / 32;
 824         } while(rem > 0);
 825 }
 826
 827 void
 828 selpaste(const Arg *dummy) {
 829         XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
 830                         xw.win, CurrentTime);
 831 }
 832
 833 void
 834 clippaste(const Arg *dummy) {
 835         Atom clipboard;
 836
 837         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 838         XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
 839                         xw.win, CurrentTime);
 840 }
 841
 842 void
 843 selclear(XEvent *e) {
 844         if(sel.bx == -1)
 845                 return;
 846         sel.bx = -1;
 847         tsetdirt(sel.b.y, sel.e.y);
 848 }
 849
 850 void
 851 selrequest(XEvent *e) {
 852         XSelectionRequestEvent *xsre;
 853         XSelectionEvent xev;
 854         Atom xa_targets, string;
 855
 856         xsre = (XSelectionRequestEvent *) e;
 857         xev.type = SelectionNotify;
 858         xev.requestor = xsre->requestor;
 859         xev.selection = xsre->selection;
 860         xev.target = xsre->target;
 861         xev.time = xsre->time;
 862         /* reject */
 863         xev.property = None;
 864
 865         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
 866         if(xsre->target == xa_targets) {
 867                 /* respond with the supported type */
 868                 string = sel.xtarget;
 869                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 870                                 XA_ATOM, 32, PropModeReplace,
 871                                 (uchar *) &string, 1);
 872                 xev.property = xsre->property;
 873         } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
 874                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 875                                 xsre->target, 8, PropModeReplace,
 876                                 (uchar *) sel.clip, strlen(sel.clip));
 877                 xev.property = xsre->property;
 878         }
 879
 880         /* all done, send a notification to the listener */
 881         if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
 882                 fprintf(stderr, "Error sending SelectionNotify event\n");
 883 }
 884
 885 void
 886 xsetsel(char *str) {
 887         /* register the selection for both the clipboard and the primary */
 888         Atom clipboard;
 889
 890         free(sel.clip);
 891         sel.clip = str;
 892
 893         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
 894
 895         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 896         XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
 897 }
 898
 899 void
 900 brelease(XEvent *e) {
 901         struct timeval now;
 902
 903         if(IS_SET(MODE_MOUSE)) {
 904                 mousereport(e);
 905                 return;
 906         }
 907
 908         if(e->xbutton.button == Button2) {
 909                 selpaste(NULL);
 910         } else if(e->xbutton.button == Button1) {
 911                 sel.mode = 0;
 912                 getbuttoninfo(e);
 913                 term.dirty[sel.ey] = 1;
 914                 if(sel.bx == sel.ex && sel.by == sel.ey) {
 915                         sel.bx = -1;
 916                         gettimeofday(&now, NULL);
 917
 918                         if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
 919                                 /* triple click on the line */
 920                                 sel.b.x = sel.bx = 0;
 921                                 sel.e.x = sel.ex = term.col;
 922                                 sel.b.y = sel.e.y = sel.ey;
 923                                 selcopy();
 924                         } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
 925                                 /* double click to select word */
 926                                 sel.bx = sel.ex;
 927                                 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
 928                                                 term.line[sel.ey][sel.bx-1].c[0] != ' ') {
 929                                         sel.bx--;
 930                                 }
 931                                 sel.b.x = sel.bx;
 932                                 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
 933                                                 term.line[sel.ey][sel.ex+1].c[0] != ' ') {
 934                                         sel.ex++;
 935                                 }
 936                                 sel.e.x = sel.ex;
 937                                 sel.b.y = sel.e.y = sel.ey;
 938                                 selcopy();
 939                         }
 940                 } else {
 941                         selcopy();
 942                 }
 943         }
 944
 945         memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
 946         gettimeofday(&sel.tclick1, NULL);
 947 }
 948
 949 void
 950 bmotion(XEvent *e) {
 951         int oldey, oldex, oldsby, oldsey;
 952
 953         if(IS_SET(MODE_MOUSE)) {
 954                 mousereport(e);
 955                 return;
 956         }
 957
 958         if(!sel.mode)
 959                 return;
 960
 961         oldey = sel.ey;
 962         oldex = sel.ex;
 963         oldsby = sel.b.y;
 964         oldsey = sel.e.y;
 965         getbuttoninfo(e);
 966
 967         if(oldey != sel.ey || oldex != sel.ex) {
 968                 tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
 969         }
 970 }
 971
 972 void
 973 die(const char *errstr, ...) {
 974         va_list ap;
 975
 976         va_start(ap, errstr);
 977         vfprintf(stderr, errstr, ap);
 978         va_end(ap);
 979         exit(EXIT_FAILURE);
 980 }
 981
 982 void
 983 execsh(void) {
 984         char **args;
 985         char *envshell = getenv("SHELL");
 986         const struct passwd *pass = getpwuid(getuid());
 987         char buf[sizeof(long) * 8 + 1];
 988
 989         unsetenv("COLUMNS");
 990         unsetenv("LINES");
 991         unsetenv("TERMCAP");
 992
 993         if(pass) {
 994                 setenv("LOGNAME", pass->pw_name, 1);
 995                 setenv("USER", pass->pw_name, 1);
 996                 setenv("SHELL", pass->pw_shell, 0);
 997                 setenv("HOME", pass->pw_dir, 0);
 998         }
 999
1000         snprintf(buf, sizeof(buf), "%lu", xw.win);
1001         setenv("WINDOWID", buf, 1);
1002
1003         signal(SIGCHLD, SIG_DFL);
1004         signal(SIGHUP, SIG_DFL);
1005         signal(SIGINT, SIG_DFL);
1006         signal(SIGQUIT, SIG_DFL);
1007         signal(SIGTERM, SIG_DFL);
1008         signal(SIGALRM, SIG_DFL);
1009
1010         DEFAULT(envshell, shell);
1011         setenv("TERM", termname, 1);
1012         args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1013         execvp(args[0], args);
1014         exit(EXIT_FAILURE);
1015 }
1016
1017 void
1018 sigchld(int a) {
1019         int stat = 0;
1020
1021         if(waitpid(pid, &stat, 0) < 0)
1022                 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1023
1024         if(WIFEXITED(stat)) {
1025                 exit(WEXITSTATUS(stat));
1026         } else {
1027                 exit(EXIT_FAILURE);
1028         }
1029 }
1030
1031 void
1032 ttynew(void) {
1033         int m, s;
1034         struct winsize w = {term.row, term.col, 0, 0};
1035
1036         /* seems to work fine on linux, openbsd and freebsd */
1037         if(openpty(&m, &s, NULL, NULL, &w) < 0)
1038                 die("openpty failed: %s\n", SERRNO);
1039
1040         switch(pid = fork()) {
1041         case -1:
1042                 die("fork failed\n");
1043                 break;
1044         case 0:
1045                 setsid(); /* create a new process group */
1046                 dup2(s, STDIN_FILENO);
1047                 dup2(s, STDOUT_FILENO);
1048                 dup2(s, STDERR_FILENO);
1049                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1050                         die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1051                 close(s);
1052                 close(m);
1053                 execsh();
1054                 break;
1055         default:
1056                 close(s);
1057                 cmdfd = m;
1058                 signal(SIGCHLD, sigchld);
1059                 if(opt_io) {
1060                         iofd = (!strcmp(opt_io, "-")) ?
1061                                   STDOUT_FILENO :
1062                                   open(opt_io, O_WRONLY | O_CREAT, 0666);
1063                         if(iofd < 0) {
1064                                 fprintf(stderr, "Error opening %s:%s\n",
1065                                         opt_io, strerror(errno));
1066                         }
1067                 }
1068         }
1069 }
1070
1071 void
1072 dump(char c) {
1073         static int col;
1074
1075         fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1076         if(++col % 10 == 0)
1077                 fprintf(stderr, "\n");
1078 }
1079
1080 void
1081 ttyread(void) {
1082         static char buf[BUFSIZ];
1083         static int buflen = 0;
1084         char *ptr;
1085         char s[UTF_SIZ];
1086         int charsize; /* size of utf8 char in bytes */
1087         long utf8c;
1088         int ret;
1089
1090         /* append read bytes to unprocessed bytes */
1091         if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1092                 die("Couldn't read from shell: %s\n", SERRNO);
1093
1094         /* process every complete utf8 char */
1095         buflen += ret;
1096         ptr = buf;
1097         while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1098                 charsize = utf8decode(ptr, &utf8c);
1099                 utf8encode(&utf8c, s);
1100                 tputc(s, charsize);
1101                 ptr += charsize;
1102                 buflen -= charsize;
1103         }
1104
1105         /* keep any uncomplete utf8 char for the next call */
1106         memmove(buf, ptr, buflen);
1107 }
1108
1109 void
1110 ttywrite(const char *s, size_t n) {
1111         if(write(cmdfd, s, n) == -1)
1112                 die("write error on tty: %s\n", SERRNO);
1113 }
1114
1115 void
1116 ttyresize(void) {
1117         struct winsize w;
1118
1119         w.ws_row = term.row;
1120         w.ws_col = term.col;
1121         w.ws_xpixel = xw.tw;
1122         w.ws_ypixel = xw.th;
1123         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1124                 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1125 }
1126
1127 void
1128 tsetdirt(int top, int bot) {
1129         int i;
1130
1131         LIMIT(top, 0, term.row-1);
1132         LIMIT(bot, 0, term.row-1);
1133
1134         for(i = top; i <= bot; i++)
1135                 term.dirty[i] = 1;
1136 }
1137
1138 void
1139 tfulldirt(void) {
1140         tsetdirt(0, term.row-1);
1141 }
1142
1143 void
1144 tcursor(int mode) {
1145         static TCursor c;
1146
1147         if(mode == CURSOR_SAVE) {
1148                 c = term.c;
1149         } else if(mode == CURSOR_LOAD) {
1150                 term.c = c;
1151                 tmoveto(c.x, c.y);
1152         }
1153 }
1154
1155 void
1156 treset(void) {
1157         uint i;
1158
1159         term.c = (TCursor){{
1160                 .mode = ATTR_NULL,
1161                 .fg = defaultfg,
1162                 .bg = defaultbg
1163         }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1164
1165         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1166         for(i = tabspaces; i < term.col; i += tabspaces)
1167                 term.tabs[i] = 1;
1168         term.top = 0;
1169         term.bot = term.row - 1;
1170         term.mode = MODE_WRAP;
1171
1172         tclearregion(0, 0, term.col-1, term.row-1, 0);
1173         tmoveto(0, 0);
1174         tcursor(CURSOR_SAVE);
1175 }
1176
1177 void
1178 tnew(int col, int row) {
1179         /* set screen size */
1180         term.row = row;
1181         term.col = col;
1182         term.line = xmalloc(term.row * sizeof(Line));
1183         term.alt  = xmalloc(term.row * sizeof(Line));
1184         term.dirty = xmalloc(term.row * sizeof(*term.dirty));
1185         term.tabs = xmalloc(term.col * sizeof(*term.tabs));
1186
1187         for(row = 0; row < term.row; row++) {
1188                 term.line[row] = xmalloc(term.col * sizeof(Glyph));
1189                 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
1190                 term.dirty[row] = 0;
1191         }
1192
1193         term.numlock = 1;
1194         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1195         /* setup screen */
1196         treset();
1197 }
1198
1199 void
1200 tswapscreen(void) {
1201         Line *tmp = term.line;
1202
1203         term.line = term.alt;
1204         term.alt = tmp;
1205         term.mode ^= MODE_ALTSCREEN;
1206         tfulldirt();
1207 }
1208
1209 void
1210 tscrolldown(int orig, int n) {
1211         int i;
1212         Line temp;
1213
1214         LIMIT(n, 0, term.bot-orig+1);
1215
1216         tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
1217
1218         for(i = term.bot; i >= orig+n; i--) {
1219                 temp = term.line[i];
1220                 term.line[i] = term.line[i-n];
1221                 term.line[i-n] = temp;
1222
1223                 term.dirty[i] = 1;
1224                 term.dirty[i-n] = 1;
1225         }
1226
1227         selscroll(orig, n);
1228 }
1229
1230 void
1231 tscrollup(int orig, int n) {
1232         int i;
1233         Line temp;
1234         LIMIT(n, 0, term.bot-orig+1);
1235
1236         tclearregion(0, orig, term.col-1, orig+n-1, 0);
1237
1238         for(i = orig; i <= term.bot-n; i++) {
1239                  temp = term.line[i];
1240                  term.line[i] = term.line[i+n];
1241                  term.line[i+n] = temp;
1242
1243                  term.dirty[i] = 1;
1244                  term.dirty[i+n] = 1;
1245         }
1246
1247         selscroll(orig, -n);
1248 }
1249
1250 void
1251 selscroll(int orig, int n) {
1252         if(sel.bx == -1)
1253                 return;
1254
1255         if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1256                 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1257                         sel.bx = -1;
1258                         return;
1259                 }
1260                 switch(sel.type) {
1261                 case SEL_REGULAR:
1262                         if(sel.by < term.top) {
1263                                 sel.by = term.top;
1264                                 sel.bx = 0;
1265                         }
1266                         if(sel.ey > term.bot) {
1267                                 sel.ey = term.bot;
1268                                 sel.ex = term.col;
1269                         }
1270                         break;
1271                 case SEL_RECTANGULAR:
1272                         if(sel.by < term.top)
1273                                 sel.by = term.top;
1274                         if(sel.ey > term.bot)
1275                                 sel.ey = term.bot;
1276                         break;
1277                 };
1278                 sel.b.y = sel.by, sel.b.x = sel.bx;
1279                 sel.e.y = sel.ey, sel.e.x = sel.ex;
1280         }
1281 }
1282
1283 void
1284 tnewline(int first_col) {
1285         int y = term.c.y;
1286
1287         if(y == term.bot) {
1288                 tscrollup(term.top, 1);
1289         } else {
1290                 y++;
1291         }
1292         tmoveto(first_col ? 0 : term.c.x, y);
1293 }
1294
1295 void
1296 csiparse(void) {
1297         char *p = csiescseq.buf, *np;
1298         long int v;
1299
1300         csiescseq.narg = 0;
1301         if(*p == '?') {
1302                 csiescseq.priv = 1;
1303                 p++;
1304         }
1305
1306         csiescseq.buf[csiescseq.len] = '\0';
1307         while(p < csiescseq.buf+csiescseq.len) {
1308                 np = NULL;
1309                 v = strtol(p, &np, 10);
1310                 if(np == p)
1311                         v = 0;
1312                 if(v == LONG_MAX || v == LONG_MIN)
1313                         v = -1;
1314                 csiescseq.arg[csiescseq.narg++] = v;
1315                 p = np;
1316                 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1317                         break;
1318                 p++;
1319         }
1320         csiescseq.mode = *p;
1321 }
1322
1323 /* for absolute user moves, when decom is set */
1324 void
1325 tmoveato(int x, int y) {
1326         tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1327 }
1328
1329 void
1330 tmoveto(int x, int y) {
1331         int miny, maxy;
1332
1333         if(term.c.state & CURSOR_ORIGIN) {
1334                 miny = term.top;
1335                 maxy = term.bot;
1336         } else {
1337                 miny = 0;
1338                 maxy = term.row - 1;
1339         }
1340         LIMIT(x, 0, term.col-1);
1341         LIMIT(y, miny, maxy);
1342         term.c.state &= ~CURSOR_WRAPNEXT;
1343         term.c.x = x;
1344         term.c.y = y;
1345 }
1346
1347 void
1348 tsetchar(char *c, Glyph *attr, int x, int y) {
1349         static char *vt100_0[62] = { /* 0x41 - 0x7e */
1350                 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1351                 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1352                 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1353                 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1354                 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1355                 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1356                 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1357                 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1358         };
1359
1360         /*
1361          * The table is proudly stolen from rxvt.
1362          */
1363         if(attr->mode & ATTR_GFX) {
1364                 if(c[0] >= 0x41 && c[0] <= 0x7e
1365                                 && vt100_0[c[0] - 0x41]) {
1366                         c = vt100_0[c[0] - 0x41];
1367                 }
1368         }
1369
1370         term.dirty[y] = 1;
1371         term.line[y][x] = *attr;
1372         memcpy(term.line[y][x].c, c, UTF_SIZ);
1373         term.line[y][x].state |= GLYPH_SET;
1374 }
1375
1376 void
1377 tclearregion(int x1, int y1, int x2, int y2, int bce) {
1378         int x, y, temp;
1379
1380         if(x1 > x2)
1381                 temp = x1, x1 = x2, x2 = temp;
1382         if(y1 > y2)
1383                 temp = y1, y1 = y2, y2 = temp;
1384
1385         LIMIT(x1, 0, term.col-1);
1386         LIMIT(x2, 0, term.col-1);
1387         LIMIT(y1, 0, term.row-1);
1388         LIMIT(y2, 0, term.row-1);
1389
1390         for(y = y1; y <= y2; y++) {
1391                 term.dirty[y] = 1;
1392                 for(x = x1; x <= x2; x++) {
1393                         if(bce) {
1394                                 term.line[y][x] = term.c.attr;
1395                                 memcpy(term.line[y][x].c, " ", 2);
1396                                 term.line[y][x].state |= GLYPH_SET;
1397                         } else {
1398                                 term.line[y][x].state = 0;
1399                         }
1400                 }
1401         }
1402 }
1403
1404 void
1405 tdeletechar(int n) {
1406         int src = term.c.x + n;
1407         int dst = term.c.x;
1408         int size = term.col - src;
1409
1410         term.dirty[term.c.y] = 1;
1411
1412         if(src >= term.col) {
1413                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1414                 return;
1415         }
1416
1417         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1418                         size * sizeof(Glyph));
1419         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
1420 }
1421
1422 void
1423 tinsertblank(int n) {
1424         int src = term.c.x;
1425         int dst = src + n;
1426         int size = term.col - dst;
1427
1428         term.dirty[term.c.y] = 1;
1429
1430         if(dst >= term.col) {
1431                 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
1432                 return;
1433         }
1434
1435         memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1436                         size * sizeof(Glyph));
1437         tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
1438 }
1439
1440 void
1441 tinsertblankline(int n) {
1442         if(term.c.y < term.top || term.c.y > term.bot)
1443                 return;
1444
1445         tscrolldown(term.c.y, n);
1446 }
1447
1448 void
1449 tdeleteline(int n) {
1450         if(term.c.y < term.top || term.c.y > term.bot)
1451                 return;
1452
1453         tscrollup(term.c.y, n);
1454 }
1455
1456 void
1457 tsetattr(int *attr, int l) {
1458         int i;
1459
1460         for(i = 0; i < l; i++) {
1461                 switch(attr[i]) {
1462                 case 0:
1463                         term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1464                                         | ATTR_ITALIC | ATTR_BLINK);
1465                         term.c.attr.fg = defaultfg;
1466                         term.c.attr.bg = defaultbg;
1467                         break;
1468                 case 1:
1469                         term.c.attr.mode |= ATTR_BOLD;
1470                         break;
1471                 case 3:
1472                         term.c.attr.mode |= ATTR_ITALIC;
1473                         break;
1474                 case 4:
1475                         term.c.attr.mode |= ATTR_UNDERLINE;
1476                         break;
1477                 case 5: /* slow blink */
1478                 case 6: /* rapid blink */
1479                         term.c.attr.mode |= ATTR_BLINK;
1480                         break;
1481                 case 7:
1482                         term.c.attr.mode |= ATTR_REVERSE;
1483                         break;
1484                 case 21:
1485                 case 22:
1486                         term.c.attr.mode &= ~ATTR_BOLD;
1487                         break;
1488                 case 23:
1489                         term.c.attr.mode &= ~ATTR_ITALIC;
1490                         break;
1491                 case 24:
1492                         term.c.attr.mode &= ~ATTR_UNDERLINE;
1493                         break;
1494                 case 25:
1495                 case 26:
1496                         term.c.attr.mode &= ~ATTR_BLINK;
1497                         break;
1498                 case 27:
1499                         term.c.attr.mode &= ~ATTR_REVERSE;
1500                         break;
1501                 case 38:
1502                         if(i + 2 < l && attr[i + 1] == 5) {
1503                                 i += 2;
1504                                 if(BETWEEN(attr[i], 0, 255)) {
1505                                         term.c.attr.fg = attr[i];
1506                                 } else {
1507                                         fprintf(stderr,
1508                                                 "erresc: bad fgcolor %d\n",
1509                                                 attr[i]);
1510                                 }
1511                         } else {
1512                                 fprintf(stderr,
1513                                         "erresc(38): gfx attr %d unknown\n",
1514                                         attr[i]);
1515                         }
1516                         break;
1517                 case 39:
1518                         term.c.attr.fg = defaultfg;
1519                         break;
1520                 case 48:
1521                         if(i + 2 < l && attr[i + 1] == 5) {
1522                                 i += 2;
1523                                 if(BETWEEN(attr[i], 0, 255)) {
1524                                         term.c.attr.bg = attr[i];
1525                                 } else {
1526                                         fprintf(stderr,
1527                                                 "erresc: bad bgcolor %d\n",
1528                                                 attr[i]);
1529                                 }
1530                         } else {
1531                                 fprintf(stderr,
1532                                         "erresc(48): gfx attr %d unknown\n",
1533                                         attr[i]);
1534                         }
1535                         break;
1536                 case 49:
1537                         term.c.attr.bg = defaultbg;
1538                         break;
1539                 default:
1540                         if(BETWEEN(attr[i], 30, 37)) {
1541                                 term.c.attr.fg = attr[i] - 30;
1542                         } else if(BETWEEN(attr[i], 40, 47)) {
1543                                 term.c.attr.bg = attr[i] - 40;
1544                         } else if(BETWEEN(attr[i], 90, 97)) {
1545                                 term.c.attr.fg = attr[i] - 90 + 8;
1546                         } else if(BETWEEN(attr[i], 100, 107)) {
1547                                 term.c.attr.bg = attr[i] - 100 + 8;
1548                         } else {
1549                                 fprintf(stderr,
1550                                         "erresc(default): gfx attr %d unknown\n",
1551                                         attr[i]), csidump();
1552                         }
1553                         break;
1554                 }
1555         }
1556 }
1557
1558 void
1559 tsetscroll(int t, int b) {
1560         int temp;
1561
1562         LIMIT(t, 0, term.row-1);
1563         LIMIT(b, 0, term.row-1);
1564         if(t > b) {
1565                 temp = t;
1566                 t = b;
1567                 b = temp;
1568         }
1569         term.top = t;
1570         term.bot = b;
1571 }
1572
1573 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1574
1575 void
1576 tsetmode(bool priv, bool set, int *args, int narg) {
1577         int *lim, mode;
1578         bool alt;
1579
1580         for(lim = args + narg; args < lim; ++args) {
1581                 if(priv) {
1582                         switch(*args) {
1583                                 break;
1584                         case 1: /* DECCKM -- Cursor key */
1585                                 MODBIT(term.mode, set, MODE_APPCURSOR);
1586                                 break;
1587                         case 5: /* DECSCNM -- Reverse video */
1588                                 mode = term.mode;
1589                                 MODBIT(term.mode, set, MODE_REVERSE);
1590                                 if(mode != term.mode)
1591                                         redraw(REDRAW_TIMEOUT);
1592                                 break;
1593                         case 6: /* DECOM -- Origin */
1594                                 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1595                                 tmoveato(0, 0);
1596                                 break;
1597                         case 7: /* DECAWM -- Auto wrap */
1598                                 MODBIT(term.mode, set, MODE_WRAP);
1599                                 break;
1600                         case 0:  /* Error (IGNORED) */
1601                         case 2:  /* DECANM -- ANSI/VT52 (IGNORED) */
1602                         case 3:  /* DECCOLM -- Column  (IGNORED) */
1603                         case 4:  /* DECSCLM -- Scroll (IGNORED) */
1604                         case 8:  /* DECARM -- Auto repeat (IGNORED) */
1605                         case 18: /* DECPFF -- Printer feed (IGNORED) */
1606                         case 19: /* DECPEX -- Printer extent (IGNORED) */
1607                         case 42: /* DECNRCM -- National characters (IGNORED) */
1608                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
1609                                 break;
1610                         case 25: /* DECTCEM -- Text Cursor Enable Mode */
1611                                 MODBIT(term.mode, !set, MODE_HIDE);
1612                                 break;
1613                         case 1000: /* 1000,1002: enable xterm mouse report */
1614                                 MODBIT(term.mode, set, MODE_MOUSEBTN);
1615                                 MODBIT(term.mode, 0, MODE_MOUSEMOTION);
1616                                 break;
1617                         case 1002:
1618                                 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1619                                 MODBIT(term.mode, 0, MODE_MOUSEBTN);
1620                                 break;
1621                         case 1006:
1622                                 MODBIT(term.mode, set, MODE_MOUSESGR);
1623                                 break;
1624                         case 1049: /* = 1047 and 1048 */
1625                         case 47:
1626                         case 1047: {
1627                                 alt = IS_SET(MODE_ALTSCREEN);
1628                                 if(alt) {
1629                                         tclearregion(0, 0, term.col-1,
1630                                                         term.row-1, 0);
1631                                 }
1632                                 if(set ^ alt)           /* set is always 1 or 0 */
1633                                         tswapscreen();
1634                                 if(*args != 1049)
1635                                         break;
1636                         }
1637                                 /* pass through */
1638                         case 1048:
1639                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1640                                 break;
1641                         default:
1642                                 fprintf(stderr,
1643                                         "erresc: unknown private set/reset mode %d\n",
1644                                         *args);
1645                                 break;
1646                         }
1647                 } else {
1648                         switch(*args) {
1649                         case 0:  /* Error (IGNORED) */
1650                                 break;
1651                         case 2:  /* KAM -- keyboard action */
1652                                 MODBIT(term.mode, set, MODE_KBDLOCK);
1653                                 break;
1654                         case 4:  /* IRM -- Insertion-replacement */
1655                                 MODBIT(term.mode, set, MODE_INSERT);
1656                                 break;
1657                         case 12: /* SRM -- Send/Receive */
1658                                 MODBIT(term.mode, !set, MODE_ECHO);
1659                                 break;
1660                         case 20: /* LNM -- Linefeed/new line */
1661                                 MODBIT(term.mode, set, MODE_CRLF);
1662                                 break;
1663                         default:
1664                                 fprintf(stderr,
1665                                         "erresc: unknown set/reset mode %d\n",
1666                                         *args);
1667                                 break;
1668                         }
1669                 }
1670         }
1671 }
1672 #undef MODBIT
1673
1674
1675 void
1676 csihandle(void) {
1677         switch(csiescseq.mode) {
1678         default:
1679         unknown:
1680                 fprintf(stderr, "erresc: unknown csi ");
1681                 csidump();
1682                 /* die(""); */
1683                 break;
1684         case '@': /* ICH -- Insert <n> blank char */
1685                 DEFAULT(csiescseq.arg[0], 1);
1686                 tinsertblank(csiescseq.arg[0]);
1687                 break;
1688         case 'A': /* CUU -- Cursor <n> Up */
1689                 DEFAULT(csiescseq.arg[0], 1);
1690                 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1691                 break;
1692         case 'B': /* CUD -- Cursor <n> Down */
1693         case 'e': /* VPR --Cursor <n> Down */
1694                 DEFAULT(csiescseq.arg[0], 1);
1695                 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1696                 break;
1697         case 'c': /* DA -- Device Attributes */
1698                 if(csiescseq.arg[0] == 0)
1699                         ttywrite(VT102ID, sizeof(VT102ID) - 1);
1700                 break;
1701         case 'C': /* CUF -- Cursor <n> Forward */
1702         case 'a': /* HPR -- Cursor <n> Forward */
1703                 DEFAULT(csiescseq.arg[0], 1);
1704                 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1705                 break;
1706         case 'D': /* CUB -- Cursor <n> Backward */
1707                 DEFAULT(csiescseq.arg[0], 1);
1708                 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1709                 break;
1710         case 'E': /* CNL -- Cursor <n> Down and first col */
1711                 DEFAULT(csiescseq.arg[0], 1);
1712                 tmoveto(0, term.c.y+csiescseq.arg[0]);
1713                 break;
1714         case 'F': /* CPL -- Cursor <n> Up and first col */
1715                 DEFAULT(csiescseq.arg[0], 1);
1716                 tmoveto(0, term.c.y-csiescseq.arg[0]);
1717                 break;
1718         case 'g': /* TBC -- Tabulation clear */
1719                 switch(csiescseq.arg[0]) {
1720                 case 0: /* clear current tab stop */
1721                         term.tabs[term.c.x] = 0;
1722                         break;
1723                 case 3: /* clear all the tabs */
1724                         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1725                         break;
1726                 default:
1727                         goto unknown;
1728                 }
1729                 break;
1730         case 'G': /* CHA -- Move to <col> */
1731         case '`': /* HPA */
1732                 DEFAULT(csiescseq.arg[0], 1);
1733                 tmoveto(csiescseq.arg[0]-1, term.c.y);
1734                 break;
1735         case 'H': /* CUP -- Move to <row> <col> */
1736         case 'f': /* HVP */
1737                 DEFAULT(csiescseq.arg[0], 1);
1738                 DEFAULT(csiescseq.arg[1], 1);
1739                 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1740                 break;
1741         case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1742                 DEFAULT(csiescseq.arg[0], 1);
1743                 while(csiescseq.arg[0]--)
1744                         tputtab(1);
1745                 break;
1746         case 'J': /* ED -- Clear screen */
1747                 sel.bx = -1;
1748                 switch(csiescseq.arg[0]) {
1749                 case 0: /* below */
1750                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
1751                         if(term.c.y < term.row-1) {
1752                                 tclearregion(0, term.c.y+1, term.col-1,
1753                                                 term.row-1, 1);
1754                         }
1755                         break;
1756                 case 1: /* above */
1757                         if(term.c.y > 1)
1758                                 tclearregion(0, 0, term.col-1, term.c.y-1, 1);
1759                         tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1760                         break;
1761                 case 2: /* all */
1762                         tclearregion(0, 0, term.col-1, term.row-1, 1);
1763                         break;
1764                 default:
1765                         goto unknown;
1766                 }
1767                 break;
1768         case 'K': /* EL -- Clear line */
1769                 switch(csiescseq.arg[0]) {
1770                 case 0: /* right */
1771                         tclearregion(term.c.x, term.c.y, term.col-1,
1772                                         term.c.y, 1);
1773                         break;
1774                 case 1: /* left */
1775                         tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
1776                         break;
1777                 case 2: /* all */
1778                         tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
1779                         break;
1780                 }
1781                 break;
1782         case 'S': /* SU -- Scroll <n> line up */
1783                 DEFAULT(csiescseq.arg[0], 1);
1784                 tscrollup(term.top, csiescseq.arg[0]);
1785                 break;
1786         case 'T': /* SD -- Scroll <n> line down */
1787                 DEFAULT(csiescseq.arg[0], 1);
1788                 tscrolldown(term.top, csiescseq.arg[0]);
1789                 break;
1790         case 'L': /* IL -- Insert <n> blank lines */
1791                 DEFAULT(csiescseq.arg[0], 1);
1792                 tinsertblankline(csiescseq.arg[0]);
1793                 break;
1794         case 'l': /* RM -- Reset Mode */
1795                 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1796                 break;
1797         case 'M': /* DL -- Delete <n> lines */
1798                 DEFAULT(csiescseq.arg[0], 1);
1799                 tdeleteline(csiescseq.arg[0]);
1800                 break;
1801         case 'X': /* ECH -- Erase <n> char */
1802                 DEFAULT(csiescseq.arg[0], 1);
1803                 tclearregion(term.c.x, term.c.y,
1804                                 term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
1805                 break;
1806         case 'P': /* DCH -- Delete <n> char */
1807                 DEFAULT(csiescseq.arg[0], 1);
1808                 tdeletechar(csiescseq.arg[0]);
1809                 break;
1810         case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1811                 DEFAULT(csiescseq.arg[0], 1);
1812                 while(csiescseq.arg[0]--)
1813                         tputtab(0);
1814                 break;
1815         case 'd': /* VPA -- Move to <row> */
1816                 DEFAULT(csiescseq.arg[0], 1);
1817                 tmoveato(term.c.x, csiescseq.arg[0]-1);
1818                 break;
1819         case 'h': /* SM -- Set terminal mode */
1820                 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1821                 break;
1822         case 'm': /* SGR -- Terminal attribute (color) */
1823                 tsetattr(csiescseq.arg, csiescseq.narg);
1824                 break;
1825         case 'r': /* DECSTBM -- Set Scrolling Region */
1826                 if(csiescseq.priv) {
1827                         goto unknown;
1828                 } else {
1829                         DEFAULT(csiescseq.arg[0], 1);
1830                         DEFAULT(csiescseq.arg[1], term.row);
1831                         tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1832                         tmoveato(0, 0);
1833                 }
1834                 break;
1835         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1836                 tcursor(CURSOR_SAVE);
1837                 break;
1838         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1839                 tcursor(CURSOR_LOAD);
1840                 break;
1841         }
1842 }
1843
1844 void
1845 csidump(void) {
1846         int i;
1847         uint c;
1848
1849         printf("ESC[");
1850         for(i = 0; i < csiescseq.len; i++) {
1851                 c = csiescseq.buf[i] & 0xff;
1852                 if(isprint(c)) {
1853                         putchar(c);
1854                 } else if(c == '\n') {
1855                         printf("(\\n)");
1856                 } else if(c == '\r') {
1857                         printf("(\\r)");
1858                 } else if(c == 0x1b) {
1859                         printf("(\\e)");
1860                 } else {
1861                         printf("(%02x)", c);
1862                 }
1863         }
1864         putchar('\n');
1865 }
1866
1867 void
1868 csireset(void) {
1869         memset(&csiescseq, 0, sizeof(csiescseq));
1870 }
1871
1872 void
1873 strhandle(void) {
1874         char *p = NULL;
1875         int i, j, narg;
1876
1877         strparse();
1878         narg = strescseq.narg;
1879
1880         switch(strescseq.type) {
1881         case ']': /* OSC -- Operating System Command */
1882                 switch(i = atoi(strescseq.args[0])) {
1883                 case 0:
1884                 case 1:
1885                 case 2:
1886                         if(narg > 1)
1887                                 xsettitle(strescseq.args[1]);
1888                         break;
1889                 case 4: /* color set */
1890                         if(narg < 3)
1891                                 break;
1892                         p = strescseq.args[2];
1893                         /* fall through */
1894                 case 104: /* color reset, here p = NULL */
1895                         j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1896                         if (!xsetcolorname(j, p)) {
1897                                 fprintf(stderr, "erresc: invalid color %s\n", p);
1898                         } else {
1899                                 /*
1900                                  * TODO if defaultbg color is changed, borders
1901                                  * are dirty
1902                                  */
1903                                 redraw(0);
1904                         }
1905                         break;
1906                 default:
1907                         fprintf(stderr, "erresc: unknown str ");
1908                         strdump();
1909                         break;
1910                 }
1911                 break;
1912         case 'k': /* old title set compatibility */
1913                 xsettitle(strescseq.args[0]);
1914                 break;
1915         case 'P': /* DSC -- Device Control String */
1916         case '_': /* APC -- Application Program Command */
1917         case '^': /* PM -- Privacy Message */
1918         default:
1919                 fprintf(stderr, "erresc: unknown str ");
1920                 strdump();
1921                 /* die(""); */
1922                 break;
1923         }
1924 }
1925
1926 void
1927 strparse(void) {
1928         char *p = strescseq.buf;
1929
1930         strescseq.narg = 0;
1931         strescseq.buf[strescseq.len] = '\0';
1932         while(p && strescseq.narg < STR_ARG_SIZ)
1933                 strescseq.args[strescseq.narg++] = strsep(&p, ";");
1934 }
1935
1936 void
1937 strdump(void) {
1938         int i;
1939         uint c;
1940
1941         printf("ESC%c", strescseq.type);
1942         for(i = 0; i < strescseq.len; i++) {
1943                 c = strescseq.buf[i] & 0xff;
1944                 if(c == '\0') {
1945                         return;
1946                 } else if(isprint(c)) {
1947                         putchar(c);
1948                 } else if(c == '\n') {
1949                         printf("(\\n)");
1950                 } else if(c == '\r') {
1951                         printf("(\\r)");
1952                 } else if(c == 0x1b) {
1953                         printf("(\\e)");
1954                 } else {
1955                         printf("(%02x)", c);
1956                 }
1957         }
1958         printf("ESC\\\n");
1959 }
1960
1961 void
1962 strreset(void) {
1963         memset(&strescseq, 0, sizeof(strescseq));
1964 }
1965
1966 void
1967 tputtab(bool forward) {
1968         uint x = term.c.x;
1969
1970         if(forward) {
1971                 if(x == term.col)
1972                         return;
1973                 for(++x; x < term.col && !term.tabs[x]; ++x)
1974                         /* nothing */ ;
1975         } else {
1976                 if(x == 0)
1977                         return;
1978                 for(--x; x > 0 && !term.tabs[x]; --x)
1979                         /* nothing */ ;
1980         }
1981         tmoveto(x, term.c.y);
1982 }
1983
1984 void
1985 techo(char *buf, int len) {
1986         for(; len > 0; buf++, len--) {
1987                 char c = *buf;
1988
1989                 if(c == '\033') {               /* escape */
1990                         tputc("^", 1);
1991                         tputc("[", 1);
1992                 } else if(c < '\x20') { /* control code */
1993                         if(c != '\n' && c != '\r' && c != '\t') {
1994                                 c |= '\x40';
1995                                 tputc("^", 1);
1996                         }
1997                         tputc(&c, 1);
1998                 } else {
1999                         break;
2000                 }
2001         }
2002         if(len)
2003                 tputc(buf, len);
2004 }
2005
2006 void
2007 tputc(char *c, int len) {
2008         uchar ascii = *c;
2009         bool control = ascii < '\x20' || ascii == 0177;
2010
2011         if(iofd != -1) {
2012                 if(xwrite(iofd, c, len) < 0) {
2013                         fprintf(stderr, "Error writing in %s:%s\n",
2014                                 opt_io, strerror(errno));
2015                         close(iofd);
2016                         iofd = -1;
2017                 }
2018         }
2019
2020         /*
2021          * STR sequences must be checked before anything else
2022          * because it can use some control codes as part of the sequence.
2023          */
2024         if(term.esc & ESC_STR) {
2025                 switch(ascii) {
2026                 case '\033':
2027                         term.esc = ESC_START | ESC_STR_END;
2028                         break;
2029                 case '\a': /* backwards compatibility to xterm */
2030                         term.esc = 0;
2031                         strhandle();
2032                         break;
2033                 default:
2034                         if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2035                                 memmove(&strescseq.buf[strescseq.len], c, len);
2036                                 strescseq.len += len;
2037                         } else {
2038                         /*
2039                          * Here is a bug in terminals. If the user never sends
2040                          * some code to stop the str or esc command, then st
2041                          * will stop responding. But this is better than
2042                          * silently failing with unknown characters. At least
2043                          * then users will report back.
2044                          *
2045                          * In the case users ever get fixed, here is the code:
2046                          */
2047                         /*
2048                          * term.esc = 0;
2049                          * strhandle();
2050                          */
2051                         }
2052                 }
2053                 return;
2054         }
2055
2056         /*
2057          * Actions of control codes must be performed as soon they arrive
2058          * because they can be embedded inside a control sequence, and
2059          * they must not cause conflicts with sequences.
2060          */
2061         if(control) {
2062                 switch(ascii) {
2063                 case '\t':      /* HT */
2064                         tputtab(1);
2065                         return;
2066                 case '\b':      /* BS */
2067                         tmoveto(term.c.x-1, term.c.y);
2068                         return;
2069                 case '\r':      /* CR */
2070                         tmoveto(0, term.c.y);
2071                         return;
2072                 case '\f':      /* LF */
2073                 case '\v':      /* VT */
2074                 case '\n':      /* LF */
2075                         /* go to first col if the mode is set */
2076                         tnewline(IS_SET(MODE_CRLF));
2077                         return;
2078                 case '\a':      /* BEL */
2079                         if(!(xw.state & WIN_FOCUSED))
2080                                 xseturgency(1);
2081                         return;
2082                 case '\033':    /* ESC */
2083                         csireset();
2084                         term.esc = ESC_START;
2085                         return;
2086                 case '\016':    /* SO */
2087                 case '\017':    /* SI */
2088                         /*
2089                          * Different charsets are hard to handle. Applications
2090                          * should use the right alt charset escapes for the
2091                          * only reason they still exist: line drawing. The
2092                          * rest is incompatible history st should not support.
2093                          */
2094                         return;
2095                 case '\032':    /* SUB */
2096                 case '\030':    /* CAN */
2097                         csireset();
2098                         return;
2099                 case '\005':    /* ENQ (IGNORED) */
2100                 case '\000':    /* NUL (IGNORED) */
2101                 case '\021':    /* XON (IGNORED) */
2102                 case '\023':    /* XOFF (IGNORED) */
2103                 case 0177:      /* DEL (IGNORED) */
2104                         return;
2105                 }
2106         } else if(term.esc & ESC_START) {
2107                 if(term.esc & ESC_CSI) {
2108                         csiescseq.buf[csiescseq.len++] = ascii;
2109                         if(BETWEEN(ascii, 0x40, 0x7E)
2110                                         || csiescseq.len >= \
2111                                         sizeof(csiescseq.buf)-1) {
2112                                 term.esc = 0;
2113                                 csiparse();
2114                                 csihandle();
2115                         }
2116                 } else if(term.esc & ESC_STR_END) {
2117                         term.esc = 0;
2118                         if(ascii == '\\')
2119                                 strhandle();
2120                 } else if(term.esc & ESC_ALTCHARSET) {
2121                         switch(ascii) {
2122                         case '0': /* Line drawing set */
2123                                 term.c.attr.mode |= ATTR_GFX;
2124                                 break;
2125                         case 'B': /* USASCII */
2126                                 term.c.attr.mode &= ~ATTR_GFX;
2127                                 break;
2128                         case 'A': /* UK (IGNORED) */
2129                         case '<': /* multinational charset (IGNORED) */
2130                         case '5': /* Finnish (IGNORED) */
2131                         case 'C': /* Finnish (IGNORED) */
2132                         case 'K': /* German (IGNORED) */
2133                                 break;
2134                         default:
2135                                 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2136                         }
2137                         term.esc = 0;
2138                 } else if(term.esc & ESC_TEST) {
2139                         if(ascii == '8') { /* DEC screen alignment test. */
2140                                 char E[UTF_SIZ] = "E";
2141                                 int x, y;
2142
2143                                 for(x = 0; x < term.col; ++x) {
2144                                         for(y = 0; y < term.row; ++y)
2145                                                 tsetchar(E, &term.c.attr, x, y);
2146                                 }
2147                         }
2148                         term.esc = 0;
2149                 } else {
2150                         switch(ascii) {
2151                         case '[':
2152                                 term.esc |= ESC_CSI;
2153                                 break;
2154                         case '#':
2155                                 term.esc |= ESC_TEST;
2156                                 break;
2157                         case 'P': /* DCS -- Device Control String */
2158                         case '_': /* APC -- Application Program Command */
2159                         case '^': /* PM -- Privacy Message */
2160                         case ']': /* OSC -- Operating System Command */
2161                         case 'k': /* old title set compatibility */
2162                                 strreset();
2163                                 strescseq.type = ascii;
2164                                 term.esc |= ESC_STR;
2165                                 break;
2166                         case '(': /* set primary charset G0 */
2167                                 term.esc |= ESC_ALTCHARSET;
2168                                 break;
2169                         case ')': /* set secondary charset G1 (IGNORED) */
2170                         case '*': /* set tertiary charset G2 (IGNORED) */
2171                         case '+': /* set quaternary charset G3 (IGNORED) */
2172                                 term.esc = 0;
2173                                 break;
2174                         case 'D': /* IND -- Linefeed */
2175                                 if(term.c.y == term.bot) {
2176                                         tscrollup(term.top, 1);
2177                                 } else {
2178                                         tmoveto(term.c.x, term.c.y+1);
2179                                 }
2180                                 term.esc = 0;
2181                                 break;
2182                         case 'E': /* NEL -- Next line */
2183                                 tnewline(1); /* always go to first col */
2184                                 term.esc = 0;
2185                                 break;
2186                         case 'H': /* HTS -- Horizontal tab stop */
2187                                 term.tabs[term.c.x] = 1;
2188                                 term.esc = 0;
2189                                 break;
2190                         case 'M': /* RI -- Reverse index */
2191                                 if(term.c.y == term.top) {
2192                                         tscrolldown(term.top, 1);
2193                                 } else {
2194                                         tmoveto(term.c.x, term.c.y-1);
2195                                 }
2196                                 term.esc = 0;
2197                                 break;
2198                         case 'Z': /* DECID -- Identify Terminal */
2199                                 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2200                                 term.esc = 0;
2201                                 break;
2202                         case 'c': /* RIS -- Reset to inital state */
2203                                 treset();
2204                                 term.esc = 0;
2205                                 xresettitle();
2206                                 break;
2207                         case '=': /* DECPAM -- Application keypad */
2208                                 term.mode |= MODE_APPKEYPAD;
2209                                 term.esc = 0;
2210                                 break;
2211                         case '>': /* DECPNM -- Normal keypad */
2212                                 term.mode &= ~MODE_APPKEYPAD;
2213                                 term.esc = 0;
2214                                 break;
2215                         case '7': /* DECSC -- Save Cursor */
2216                                 tcursor(CURSOR_SAVE);
2217                                 term.esc = 0;
2218                                 break;
2219                         case '8': /* DECRC -- Restore Cursor */
2220                                 tcursor(CURSOR_LOAD);
2221                                 term.esc = 0;
2222                                 break;
2223                         case '\\': /* ST -- Stop */
2224                                 term.esc = 0;
2225                                 break;
2226                         default:
2227                                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2228                                         (uchar) ascii, isprint(ascii)? ascii:'.');
2229                                 term.esc = 0;
2230                         }
2231                 }
2232                 /*
2233                  * All characters which form part of a sequence are not
2234                  * printed
2235                  */
2236                 return;
2237         }
2238         /*
2239          * Display control codes only if we are in graphic mode
2240          */
2241         if(control && !(term.c.attr.mode & ATTR_GFX))
2242                 return;
2243         if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
2244                 sel.bx = -1;
2245         if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
2246                 tnewline(1); /* always go to first col */
2247
2248         if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2249                 memmove(&term.line[term.c.y][term.c.x+1],
2250                         &term.line[term.c.y][term.c.x],
2251                         (term.col - term.c.x - 1) * sizeof(Glyph));
2252         }
2253
2254         tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2255         if(term.c.x+1 < term.col) {
2256                 tmoveto(term.c.x+1, term.c.y);
2257         } else {
2258                 term.c.state |= CURSOR_WRAPNEXT;
2259         }
2260 }
2261
2262 int
2263 tresize(int col, int row) {
2264         int i, x;
2265         int minrow = MIN(row, term.row);
2266         int mincol = MIN(col, term.col);
2267         int slide = term.c.y - row + 1;
2268         bool *bp;
2269
2270         if(col < 1 || row < 1)
2271                 return 0;
2272
2273         /* free unneeded rows */
2274         i = 0;
2275         if(slide > 0) {
2276                 /*
2277                  * slide screen to keep cursor where we expect it -
2278                  * tscrollup would work here, but we can optimize to
2279                  * memmove because we're freeing the earlier lines
2280                  */
2281                 for(/* i = 0 */; i < slide; i++) {
2282                         free(term.line[i]);
2283                         free(term.alt[i]);
2284                 }
2285                 memmove(term.line, term.line + slide, row * sizeof(Line));
2286                 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2287         }
2288         for(i += row; i < term.row; i++) {
2289                 free(term.line[i]);
2290                 free(term.alt[i]);
2291         }
2292
2293         /* resize to new height */
2294         term.line = xrealloc(term.line, row * sizeof(Line));
2295         term.alt  = xrealloc(term.alt,  row * sizeof(Line));
2296         term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2297         term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2298
2299         /* resize each row to new width, zero-pad if needed */
2300         for(i = 0; i < minrow; i++) {
2301                 term.dirty[i] = 1;
2302                 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2303                 term.alt[i]  = xrealloc(term.alt[i],  col * sizeof(Glyph));
2304                 for(x = mincol; x < col; x++) {
2305                         term.line[i][x].state = 0;
2306                         term.alt[i][x].state = 0;
2307                 }
2308         }
2309
2310         /* allocate any new rows */
2311         for(/* i == minrow */; i < row; i++) {
2312                 term.dirty[i] = 1;
2313                 term.line[i] = xcalloc(col, sizeof(Glyph));
2314                 term.alt [i] = xcalloc(col, sizeof(Glyph));
2315         }
2316         if(col > term.col) {
2317                 bp = term.tabs + term.col;
2318
2319                 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2320                 while(--bp > term.tabs && !*bp)
2321                         /* nothing */ ;
2322                 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2323                         *bp = 1;
2324         }
2325         /* update terminal size */
2326         term.col = col;
2327         term.row = row;
2328         /* reset scrolling region */
2329         tsetscroll(0, row-1);
2330         /* make use of the LIMIT in tmoveto */
2331         tmoveto(term.c.x, term.c.y);
2332
2333         return (slide > 0);
2334 }
2335
2336 void
2337 xresize(int col, int row) {
2338         xw.tw = MAX(1, col * xw.cw);
2339         xw.th = MAX(1, row * xw.ch);
2340
2341         XFreePixmap(xw.dpy, xw.buf);
2342         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2343                         DefaultDepth(xw.dpy, xw.scr));
2344         XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
2345         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2346
2347         XftDrawChange(xw.draw, xw.buf);
2348 }
2349
2350 static inline ushort
2351 sixd_to_16bit(int x) {
2352         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2353 }
2354
2355 void
2356 xloadcols(void) {
2357         int i, r, g, b;
2358         XRenderColor color = { .alpha = 0xffff };
2359
2360         /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2361         for(i = 0; i < LEN(colorname); i++) {
2362                 if(!colorname[i])
2363                         continue;
2364                 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2365                         die("Could not allocate color '%s'\n", colorname[i]);
2366                 }
2367         }
2368
2369         /* load colors [16-255] ; same colors as xterm */
2370         for(i = 16, r = 0; r < 6; r++) {
2371                 for(g = 0; g < 6; g++) {
2372                         for(b = 0; b < 6; b++) {
2373                                 color.red = sixd_to_16bit(r);
2374                                 color.green = sixd_to_16bit(g);
2375                                 color.blue = sixd_to_16bit(b);
2376                                 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2377                                         die("Could not allocate color %d\n", i);
2378                                 }
2379                                 i++;
2380                         }
2381                 }
2382         }
2383
2384         for(r = 0; r < 24; r++, i++) {
2385                 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2386                 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2387                                         &dc.col[i])) {
2388                         die("Could not allocate color %d\n", i);
2389                 }
2390         }
2391 }
2392
2393 int
2394 xsetcolorname(int x, const char *name) {
2395         XRenderColor color = { .alpha = 0xffff };
2396         Colour colour;
2397         if (x < 0 || x > LEN(colorname))
2398                 return -1;
2399         if(!name) {
2400                 if(16 <= x && x < 16 + 216) {
2401                         int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2402                         color.red = sixd_to_16bit(r);
2403                         color.green = sixd_to_16bit(g);
2404                         color.blue = sixd_to_16bit(b);
2405                         if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2406                                 return 0; /* something went wrong */
2407                         dc.col[x] = colour;
2408                         return 1;
2409                 } else if (16 + 216 <= x && x < 256) {
2410                         color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2411                         if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2412                                 return 0; /* something went wrong */
2413                         dc.col[x] = colour;
2414                         return 1;
2415                 } else {
2416                         name = colorname[x];
2417                 }
2418         }
2419         if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2420                 return 0;
2421         dc.col[x] = colour;
2422         return 1;
2423 }
2424
2425 void
2426 xtermclear(int col1, int row1, int col2, int row2) {
2427         XftDrawRect(xw.draw,
2428                         &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2429                         borderpx + col1 * xw.cw,
2430                         borderpx + row1 * xw.ch,
2431                         (col2-col1+1) * xw.cw,
2432                         (row2-row1+1) * xw.ch);
2433 }
2434
2435 /*
2436  * Absolute coordinates.
2437  */
2438 void
2439 xclear(int x1, int y1, int x2, int y2) {
2440         XftDrawRect(xw.draw,
2441                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2442                         x1, y1, x2-x1, y2-y1);
2443 }
2444
2445 void
2446 xhints(void) {
2447         XClassHint class = {opt_class ? opt_class : termname, termname};
2448         XWMHints wm = {.flags = InputHint, .input = 1};
2449         XSizeHints *sizeh = NULL;
2450
2451         sizeh = XAllocSizeHints();
2452         if(xw.isfixed == False) {
2453                 sizeh->flags = PSize | PResizeInc | PBaseSize;
2454                 sizeh->height = xw.h;
2455                 sizeh->width = xw.w;
2456                 sizeh->height_inc = xw.ch;
2457                 sizeh->width_inc = xw.cw;
2458                 sizeh->base_height = 2 * borderpx;
2459                 sizeh->base_width = 2 * borderpx;
2460         } else {
2461                 sizeh->flags = PMaxSize | PMinSize;
2462                 sizeh->min_width = sizeh->max_width = xw.fw;
2463                 sizeh->min_height = sizeh->max_height = xw.fh;
2464         }
2465
2466         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2467         XFree(sizeh);
2468 }
2469
2470 int
2471 xloadfont(Font *f, FcPattern *pattern) {
2472         FcPattern *match;
2473         FcResult result;
2474
2475         match = FcFontMatch(NULL, pattern, &result);
2476         if(!match)
2477                 return 1;
2478
2479         if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
2480                 FcPatternDestroy(match);
2481                 return 1;
2482         }
2483
2484         if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2485                 FcPatternDestroy(match);
2486                 return 1;
2487         }
2488
2489         f->pattern = FcPatternDuplicate(pattern);
2490
2491         f->ascent = f->match->ascent;
2492         f->descent = f->match->descent;
2493         f->lbearing = 0;
2494         f->rbearing = f->match->max_advance_width;
2495
2496         f->height = f->match->height;
2497         f->width = f->lbearing + f->rbearing;
2498
2499         return 0;
2500 }
2501
2502 void
2503 xloadfonts(char *fontstr, int fontsize) {
2504         FcPattern *pattern;
2505         FcResult result;
2506         double fontval;
2507
2508         if(fontstr[0] == '-') {
2509                 pattern = XftXlfdParse(fontstr, False, False);
2510         } else {
2511                 pattern = FcNameParse((FcChar8 *)fontstr);
2512         }
2513
2514         if(!pattern)
2515                 die("st: can't open font %s\n", fontstr);
2516
2517         if(fontsize > 0) {
2518                 FcPatternDel(pattern, FC_PIXEL_SIZE);
2519                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2520                 usedfontsize = fontsize;
2521         } else {
2522                 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2523                 if(result == FcResultMatch) {
2524                         usedfontsize = (int)fontval;
2525                 } else {
2526                         /*
2527                          * Default font size is 12, if none given. This is to
2528                          * have a known usedfontsize value.
2529                          */
2530                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2531                         usedfontsize = 12;
2532                 }
2533         }
2534
2535         FcConfigSubstitute(0, pattern, FcMatchPattern);
2536         FcDefaultSubstitute(pattern);
2537
2538         if(xloadfont(&dc.font, pattern))
2539                 die("st: can't open font %s\n", fontstr);
2540
2541         /* Setting character width and height. */
2542         xw.cw = dc.font.width;
2543         xw.ch = dc.font.height;
2544
2545         FcPatternDel(pattern, FC_SLANT);
2546         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2547         if(xloadfont(&dc.ifont, pattern))
2548                 die("st: can't open font %s\n", fontstr);
2549
2550         FcPatternDel(pattern, FC_WEIGHT);
2551         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2552         if(xloadfont(&dc.ibfont, pattern))
2553                 die("st: can't open font %s\n", fontstr);
2554
2555         FcPatternDel(pattern, FC_SLANT);
2556         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2557         if(xloadfont(&dc.bfont, pattern))
2558                 die("st: can't open font %s\n", fontstr);
2559
2560         FcPatternDestroy(pattern);
2561 }
2562
2563 void
2564 xunloadfonts(void) {
2565         int i, ip;
2566
2567         /*
2568          * Free the loaded fonts in the font cache. This is done backwards
2569          * from the frccur.
2570          */
2571         for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2572                 if(ip < 0)
2573                         ip = LEN(frc) - 1;
2574                 XftFontClose(xw.dpy, frc[ip].font);
2575         }
2576         frccur = -1;
2577         frclen = 0;
2578
2579         XftFontClose(xw.dpy, dc.font.match);
2580         FcPatternDestroy(dc.font.pattern);
2581         FcFontSetDestroy(dc.font.set);
2582         XftFontClose(xw.dpy, dc.bfont.match);
2583         FcPatternDestroy(dc.bfont.pattern);
2584         FcFontSetDestroy(dc.bfont.set);
2585         XftFontClose(xw.dpy, dc.ifont.match);
2586         FcPatternDestroy(dc.ifont.pattern);
2587         FcFontSetDestroy(dc.ifont.set);
2588         XftFontClose(xw.dpy, dc.ibfont.match);
2589         FcPatternDestroy(dc.ibfont.pattern);
2590         FcFontSetDestroy(dc.ibfont.set);
2591 }
2592
2593 void
2594 xzoom(const Arg *arg) {
2595         xunloadfonts();
2596         xloadfonts(usedfont, usedfontsize + arg->i);
2597         cresize(0, 0);
2598         redraw(0);
2599 }
2600
2601 void
2602 xinit(void) {
2603         XSetWindowAttributes attrs;
2604         XGCValues gcvalues;
2605         Cursor cursor;
2606         Window parent;
2607         int sw, sh;
2608
2609         if(!(xw.dpy = XOpenDisplay(NULL)))
2610                 die("Can't open display\n");
2611         xw.scr = XDefaultScreen(xw.dpy);
2612         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2613
2614         /* font */
2615         if(!FcInit())
2616                 die("Could not init fontconfig.\n");
2617
2618         usedfont = (opt_font == NULL)? font : opt_font;
2619         xloadfonts(usedfont, 0);
2620
2621         /* colors */
2622         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2623         xloadcols();
2624
2625         /* adjust fixed window geometry */
2626         if(xw.isfixed) {
2627                 sw = DisplayWidth(xw.dpy, xw.scr);
2628                 sh = DisplayHeight(xw.dpy, xw.scr);
2629                 if(xw.fx < 0)
2630                         xw.fx = sw + xw.fx - xw.fw - 1;
2631                 if(xw.fy < 0)
2632                         xw.fy = sh + xw.fy - xw.fh - 1;
2633
2634                 xw.h = xw.fh;
2635                 xw.w = xw.fw;
2636         } else {
2637                 /* window - default size */
2638                 xw.h = 2 * borderpx + term.row * xw.ch;
2639                 xw.w = 2 * borderpx + term.col * xw.cw;
2640                 xw.fx = 0;
2641                 xw.fy = 0;
2642         }
2643
2644         /* Events */
2645         attrs.background_pixel = dc.col[defaultbg].pixel;
2646         attrs.border_pixel = dc.col[defaultbg].pixel;
2647         attrs.bit_gravity = NorthWestGravity;
2648         attrs.event_mask = FocusChangeMask | KeyPressMask
2649                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2650                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2651         attrs.colormap = xw.cmap;
2652
2653         parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2654                         XRootWindow(xw.dpy, xw.scr);
2655         xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2656                         xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2657                         xw.vis,
2658                         CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2659                         | CWColormap,
2660                         &attrs);
2661
2662         memset(&gcvalues, 0, sizeof(gcvalues));
2663         gcvalues.graphics_exposures = False;
2664         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2665                         &gcvalues);
2666         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2667                         DefaultDepth(xw.dpy, xw.scr));
2668         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2669         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2670
2671         /* Xft rendering context */
2672         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2673
2674         /* input methods */
2675         if((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2676                 XSetLocaleModifiers("@im=local");
2677                 if((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2678                         XSetLocaleModifiers("@im=");
2679                         if((xw.xim = XOpenIM(xw.dpy,
2680                                         NULL, NULL, NULL)) == NULL) {
2681                                 die("XOpenIM failed. Could not open input"
2682                                         " device.\n");
2683                         }
2684                 }
2685         }
2686         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2687                                            | XIMStatusNothing, XNClientWindow, xw.win,
2688                                            XNFocusWindow, xw.win, NULL);
2689         if(xw.xic == NULL)
2690                 die("XCreateIC failed. Could not obtain input method.\n");
2691
2692         /* white cursor, black outline */
2693         cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2694         XDefineCursor(xw.dpy, xw.win, cursor);
2695         XRecolorCursor(xw.dpy, cursor,
2696                 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2697                 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2698
2699         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2700         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2701         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2702
2703         xresettitle();
2704         XMapWindow(xw.dpy, xw.win);
2705         xhints();
2706         XSync(xw.dpy, 0);
2707 }
2708
2709 void
2710 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2711         int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2712             width = charlen * xw.cw, xp, i;
2713         int frp, frcflags;
2714         int u8fl, u8fblen, u8cblen, doesexist;
2715         char *u8c, *u8fs;
2716         long u8char;
2717         Font *font = &dc.font;
2718         FcResult fcres;
2719         FcPattern *fcpattern, *fontpattern;
2720         FcFontSet *fcsets[] = { NULL };
2721         FcCharSet *fccharset;
2722         Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
2723                  *temp, revfg, revbg;
2724         XRenderColor colfg, colbg;
2725
2726         frcflags = FRC_NORMAL;
2727
2728         if(base.mode & ATTR_BOLD) {
2729                 if(BETWEEN(base.fg, 0, 7)) {
2730                         /* basic system colors */
2731                         fg = &dc.col[base.fg + 8];
2732                 } else if(BETWEEN(base.fg, 16, 195)) {
2733                         /* 256 colors */
2734                         fg = &dc.col[base.fg + 36];
2735                 } else if(BETWEEN(base.fg, 232, 251)) {
2736                         /* greyscale */
2737                         fg = &dc.col[base.fg + 4];
2738                 }
2739                 /*
2740                  * Those ranges will not be brightened:
2741                  *      8 - 15 – bright system colors
2742                  *      196 - 231 – highest 256 color cube
2743                  *      252 - 255 – brightest colors in greyscale
2744                  */
2745                 font = &dc.bfont;
2746                 frcflags = FRC_BOLD;
2747         }
2748
2749         if(base.mode & ATTR_ITALIC) {
2750                 font = &dc.ifont;
2751                 frcflags = FRC_ITALIC;
2752         }
2753         if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2754                 font = &dc.ibfont;
2755                 frcflags = FRC_ITALICBOLD;
2756         }
2757
2758         if(IS_SET(MODE_REVERSE)) {
2759                 if(fg == &dc.col[defaultfg]) {
2760                         fg = &dc.col[defaultbg];
2761                 } else {
2762                         colfg.red = ~fg->color.red;
2763                         colfg.green = ~fg->color.green;
2764                         colfg.blue = ~fg->color.blue;
2765                         colfg.alpha = fg->color.alpha;
2766                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2767                         fg = &revfg;
2768                 }
2769
2770                 if(bg == &dc.col[defaultbg]) {
2771                         bg = &dc.col[defaultfg];
2772                 } else {
2773                         colbg.red = ~bg->color.red;
2774                         colbg.green = ~bg->color.green;
2775                         colbg.blue = ~bg->color.blue;
2776                         colbg.alpha = bg->color.alpha;
2777                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2778                         bg = &revbg;
2779                 }
2780         }
2781
2782         if(base.mode & ATTR_REVERSE) {
2783                 temp = fg;
2784                 fg = bg;
2785                 bg = temp;
2786         }
2787
2788         /* Intelligent cleaning up of the borders. */
2789         if(x == 0) {
2790                 xclear(0, (y == 0)? 0 : winy, borderpx,
2791                         winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
2792         }
2793         if(x + charlen >= term.col) {
2794                 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
2795                         ((y >= term.row-1)? xw.h : (winy + xw.ch)));
2796         }
2797         if(y == 0)
2798                 xclear(winx, 0, winx + width, borderpx);
2799         if(y == term.row-1)
2800                 xclear(winx, winy + xw.ch, winx + width, xw.h);
2801
2802         /* Clean up the region we want to draw to. */
2803         XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
2804
2805         fcsets[0] = font->set;
2806         for(xp = winx; bytelen > 0;) {
2807                 /*
2808                  * Search for the range in the to be printed string of glyphs
2809                  * that are in the main font. Then print that range. If
2810                  * some glyph is found that is not in the font, do the
2811                  * fallback dance.
2812                  */
2813                 u8fs = s;
2814                 u8fblen = 0;
2815                 u8fl = 0;
2816                 for(;;) {
2817                         u8c = s;
2818                         u8cblen = utf8decode(s, &u8char);
2819                         s += u8cblen;
2820                         bytelen -= u8cblen;
2821
2822                         doesexist = XftCharIndex(xw.dpy, font->match, u8char);
2823                         if(!doesexist || bytelen <= 0) {
2824                                 if(bytelen <= 0) {
2825                                         if(doesexist) {
2826                                                 u8fl++;
2827                                                 u8fblen += u8cblen;
2828                                         }
2829                                 }
2830
2831                                 if(u8fl > 0) {
2832                                         XftDrawStringUtf8(xw.draw, fg,
2833                                                         font->match, xp,
2834                                                         winy + font->ascent,
2835                                                         (FcChar8 *)u8fs,
2836                                                         u8fblen);
2837                                         xp += font->width * u8fl;
2838                                 }
2839                                 break;
2840                         }
2841
2842                         u8fl++;
2843                         u8fblen += u8cblen;
2844                 }
2845                 if(doesexist)
2846                         break;
2847
2848                 frp = frccur;
2849                 /* Search the font cache. */
2850                 for(i = 0; i < frclen; i++, frp--) {
2851                         if(frp <= 0)
2852                                 frp = LEN(frc) - 1;
2853
2854                         if(frc[frp].c == u8char
2855                                         && frc[frp].flags == frcflags) {
2856                                 break;
2857                         }
2858                 }
2859
2860                 /* Nothing was found. */
2861                 if(i >= frclen) {
2862                         /*
2863                          * Nothing was found in the cache. Now use
2864                          * some dozen of Fontconfig calls to get the
2865                          * font for one single character.
2866                          */
2867                         fcpattern = FcPatternDuplicate(font->pattern);
2868                         fccharset = FcCharSetCreate();
2869
2870                         FcCharSetAddChar(fccharset, u8char);
2871                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
2872                                         fccharset);
2873                         FcPatternAddBool(fcpattern, FC_SCALABLE,
2874                                         FcTrue);
2875
2876                         FcConfigSubstitute(0, fcpattern,
2877                                         FcMatchPattern);
2878                         FcDefaultSubstitute(fcpattern);
2879
2880                         fontpattern = FcFontSetMatch(0, fcsets,
2881                                         FcTrue, fcpattern, &fcres);
2882
2883                         /*
2884                          * Overwrite or create the new cache entry
2885                          * entry.
2886                          */
2887                         frccur++;
2888                         frclen++;
2889                         if(frccur >= LEN(frc))
2890                                 frccur = 0;
2891                         if(frclen > LEN(frc)) {
2892                                 frclen = LEN(frc);
2893                                 XftFontClose(xw.dpy, frc[frccur].font);
2894                         }
2895
2896                         frc[frccur].font = XftFontOpenPattern(xw.dpy,
2897                                         fontpattern);
2898                         frc[frccur].c = u8char;
2899                         frc[frccur].flags = frcflags;
2900
2901                         FcPatternDestroy(fcpattern);
2902                         FcCharSetDestroy(fccharset);
2903
2904                         frp = frccur;
2905                 }
2906
2907                 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
2908                                 xp, winy + frc[frp].font->ascent,
2909                                 (FcChar8 *)u8c, u8cblen);
2910
2911                 xp += font->width;
2912         }
2913
2914         /*
2915         XftDrawStringUtf8(xw.draw, fg, font->set, winx,
2916                         winy + font->ascent, (FcChar8 *)s, bytelen);
2917         */
2918
2919         if(base.mode & ATTR_UNDERLINE) {
2920                 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
2921                                 width, 1);
2922         }
2923 }
2924
2925 void
2926 xdrawcursor(void) {
2927         static int oldx = 0, oldy = 0;
2928         int sl;
2929         Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
2930
2931         LIMIT(oldx, 0, term.col-1);
2932         LIMIT(oldy, 0, term.row-1);
2933
2934         if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2935                 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2936
2937         /* remove the old cursor */
2938         if(term.line[oldy][oldx].state & GLYPH_SET) {
2939                 sl = utf8size(term.line[oldy][oldx].c);
2940                 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
2941                                 oldy, 1, sl);
2942         } else {
2943                 xtermclear(oldx, oldy, oldx, oldy);
2944         }
2945
2946         /* draw the new one */
2947         if(!(IS_SET(MODE_HIDE))) {
2948                 if(!(xw.state & WIN_FOCUSED))
2949                         g.bg = defaultucs;
2950
2951                 if(IS_SET(MODE_REVERSE))
2952                         g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
2953
2954                 sl = utf8size(g.c);
2955                 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2956                 oldx = term.c.x, oldy = term.c.y;
2957         }
2958 }
2959
2960
2961 void
2962 xsettitle(char *p) {
2963         XTextProperty prop;
2964
2965         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
2966                         &prop);
2967         XSetWMName(xw.dpy, xw.win, &prop);
2968 }
2969
2970 void
2971 xresettitle(void) {
2972         xsettitle(opt_title ? opt_title : "st");
2973 }
2974
2975 void
2976 redraw(int timeout) {
2977         struct timespec tv = {0, timeout * 1000};
2978
2979         tfulldirt();
2980         draw();
2981
2982         if(timeout > 0) {
2983                 nanosleep(&tv, NULL);
2984                 XSync(xw.dpy, False); /* necessary for a good tput flash */
2985         }
2986 }
2987
2988 void
2989 draw(void) {
2990         drawregion(0, 0, term.col, term.row);
2991         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
2992                         xw.h, 0, 0);
2993         XSetForeground(xw.dpy, dc.gc,
2994                         dc.col[IS_SET(MODE_REVERSE)?
2995                                 defaultfg : defaultbg].pixel);
2996 }
2997
2998 void
2999 drawregion(int x1, int y1, int x2, int y2) {
3000         int ic, ib, x, y, ox, sl;
3001         Glyph base, new;
3002         char buf[DRAW_BUF_SIZ];
3003         bool ena_sel = sel.bx != -1;
3004
3005         if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3006                 ena_sel = 0;
3007
3008         if(!(xw.state & WIN_VISIBLE))
3009                 return;
3010
3011         for(y = y1; y < y2; y++) {
3012                 if(!term.dirty[y])
3013                         continue;
3014
3015                 xtermclear(0, y, term.col, y);
3016                 term.dirty[y] = 0;
3017                 base = term.line[y][0];
3018                 ic = ib = ox = 0;
3019                 for(x = x1; x < x2; x++) {
3020                         new = term.line[y][x];
3021                         if(ena_sel && *(new.c) && selected(x, y))
3022                                 new.mode ^= ATTR_REVERSE;
3023                         if(ib > 0 && (!(new.state & GLYPH_SET)
3024                                         || ATTRCMP(base, new)
3025                                         || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3026                                 xdraws(buf, base, ox, y, ic, ib);
3027                                 ic = ib = 0;
3028                         }
3029                         if(new.state & GLYPH_SET) {
3030                                 if(ib == 0) {
3031                                         ox = x;
3032                                         base = new;
3033                                 }
3034
3035                                 sl = utf8size(new.c);
3036                                 memcpy(buf+ib, new.c, sl);
3037                                 ib += sl;
3038                                 ++ic;
3039                         }
3040                 }
3041                 if(ib > 0)
3042                         xdraws(buf, base, ox, y, ic, ib);
3043         }
3044         xdrawcursor();
3045 }
3046
3047 void
3048 expose(XEvent *ev) {
3049         XExposeEvent *e = &ev->xexpose;
3050
3051         if(xw.state & WIN_REDRAW) {
3052                 if(!e->count)
3053                         xw.state &= ~WIN_REDRAW;
3054         }
3055         redraw(0);
3056 }
3057
3058 void
3059 visibility(XEvent *ev) {
3060         XVisibilityEvent *e = &ev->xvisibility;
3061
3062         if(e->state == VisibilityFullyObscured) {
3063                 xw.state &= ~WIN_VISIBLE;
3064         } else if(!(xw.state & WIN_VISIBLE)) {
3065                 /* need a full redraw for next Expose, not just a buf copy */
3066                 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3067         }
3068 }
3069
3070 void
3071 unmap(XEvent *ev) {
3072         xw.state &= ~WIN_VISIBLE;
3073 }
3074
3075 void
3076 xseturgency(int add) {
3077         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3078
3079         h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3080         XSetWMHints(xw.dpy, xw.win, h);
3081         XFree(h);
3082 }
3083
3084 void
3085 focus(XEvent *ev) {
3086         XFocusChangeEvent *e = &ev->xfocus;
3087
3088         if(e->mode == NotifyGrab)
3089                 return;
3090
3091         if(ev->type == FocusIn) {
3092                 XSetICFocus(xw.xic);
3093                 xw.state |= WIN_FOCUSED;
3094                 xseturgency(0);
3095         } else {
3096                 XUnsetICFocus(xw.xic);
3097                 xw.state &= ~WIN_FOCUSED;
3098         }
3099 }
3100
3101 inline bool
3102 match(uint mask, uint state) {
3103         state &= ~(ignoremod);
3104
3105         if(mask == XK_NO_MOD && state)
3106                 return false;
3107         if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3108                 return false;
3109         if((state & mask) != state)
3110                 return false;
3111         return true;
3112 }
3113
3114 void
3115 numlock(const Arg *dummy) {
3116         term.numlock ^= 1;
3117 }
3118
3119 char*
3120 kmap(KeySym k, uint state) {
3121         uint mask;
3122         Key *kp;
3123         int i;
3124
3125         /* Check for mapped keys out of X11 function keys. */
3126         for(i = 0; i < LEN(mappedkeys); i++) {
3127                 if(mappedkeys[i] == k)
3128                         break;
3129         }
3130         if(i == LEN(mappedkeys)) {
3131                 if((k & 0xFFFF) < 0xFD00)
3132                         return NULL;
3133         }
3134
3135         for(kp = key; kp < key + LEN(key); kp++) {
3136                 mask = kp->mask;
3137
3138                 if(kp->k != k)
3139                         continue;
3140
3141                 if(!match(mask, state))
3142                         continue;
3143
3144                 if(kp->appkey > 0) {
3145                         if(!IS_SET(MODE_APPKEYPAD))
3146                                 continue;
3147                         if(term.numlock && kp->appkey == 2)
3148                                 continue;
3149                 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3150                         continue;
3151                 }
3152
3153                 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3154                                 (kp->appcursor > 0
3155                                  && !IS_SET(MODE_APPCURSOR))) {
3156                         continue;
3157                 }
3158
3159                 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3160                                 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3161                         continue;
3162                 }
3163
3164                 return kp->s;
3165         }
3166
3167         return NULL;
3168 }
3169
3170 void
3171 kpress(XEvent *ev) {
3172         XKeyEvent *e = &ev->xkey;
3173         KeySym ksym;
3174         char xstr[31], buf[32], *customkey, *cp = buf;
3175         int len;
3176         Status status;
3177         Shortcut *bp;
3178
3179         if(IS_SET(MODE_KBDLOCK))
3180                 return;
3181
3182         len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3183         e->state &= ~Mod2Mask;
3184         /* 1. shortcuts */
3185         for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3186                 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3187                         bp->func(&(bp->arg));
3188                         return;
3189                 }
3190         }
3191
3192         /* 2. custom keys from config.h */
3193         if((customkey = kmap(ksym, e->state))) {
3194                 len = strlen(customkey);
3195                 memcpy(buf, customkey, len);
3196         /* 2. hardcoded (overrides X lookup) */
3197         } else {
3198                 if(len == 0)
3199                         return;
3200
3201                 if(len == 1 && e->state & Mod1Mask)
3202                         *cp++ = '\033';
3203
3204                 memcpy(cp, xstr, len);
3205                 len = cp - buf + len;
3206         }
3207
3208         ttywrite(buf, len);
3209         if(IS_SET(MODE_ECHO))
3210                 techo(buf, len);
3211 }
3212
3213
3214 void
3215 cmessage(XEvent *e) {
3216         /*
3217          * See xembed specs
3218          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3219          */
3220         if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3221                 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3222                         xw.state |= WIN_FOCUSED;
3223                         xseturgency(0);
3224                 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3225                         xw.state &= ~WIN_FOCUSED;
3226                 }
3227         } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3228                 /* Send SIGHUP to shell */
3229                 kill(pid, SIGHUP);
3230                 exit(EXIT_SUCCESS);
3231         }
3232 }
3233
3234 void
3235 cresize(int width, int height) {
3236         int col, row;
3237
3238         if(width != 0)
3239                 xw.w = width;
3240         if(height != 0)
3241                 xw.h = height;
3242
3243         col = (xw.w - 2 * borderpx) / xw.cw;
3244         row = (xw.h - 2 * borderpx) / xw.ch;
3245
3246         tresize(col, row);
3247         xresize(col, row);
3248         ttyresize();
3249 }
3250
3251 void
3252 resize(XEvent *e) {
3253         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3254                 return;
3255
3256         cresize(e->xconfigure.width, e->xconfigure.height);
3257 }
3258
3259 void
3260 run(void) {
3261         XEvent ev;
3262         fd_set rfd;
3263         int xfd = XConnectionNumber(xw.dpy), xev;
3264         struct timeval drawtimeout, *tv = NULL, now, last;
3265
3266         gettimeofday(&last, NULL);
3267
3268         for(xev = actionfps;;) {
3269                 FD_ZERO(&rfd);
3270                 FD_SET(cmdfd, &rfd);
3271                 FD_SET(xfd, &rfd);
3272                 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3273                         if(errno == EINTR)
3274                                 continue;
3275                         die("select failed: %s\n", SERRNO);
3276                 }
3277
3278                 gettimeofday(&now, NULL);
3279                 drawtimeout.tv_sec = 0;
3280                 drawtimeout.tv_usec = (1000/xfps) * 1000;
3281                 tv = &drawtimeout;
3282
3283                 if(FD_ISSET(cmdfd, &rfd))
3284                         ttyread();
3285
3286                 if(FD_ISSET(xfd, &rfd))
3287                         xev = actionfps;
3288
3289                 if(TIMEDIFF(now, last) > \
3290                                 (xev ? (1000/xfps) : (1000/actionfps))) {
3291                         while(XPending(xw.dpy)) {
3292                                 XNextEvent(xw.dpy, &ev);
3293                                 if(XFilterEvent(&ev, None))
3294                                         continue;
3295                                 if(handler[ev.type])
3296                                         (handler[ev.type])(&ev);
3297                         }
3298
3299                         draw();
3300                         XFlush(xw.dpy);
3301                         last = now;
3302
3303                         if(xev && !FD_ISSET(xfd, &rfd))
3304                                 xev--;
3305                         if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
3306                                 tv = NULL;
3307                 }
3308         }
3309 }
3310
3311 int
3312 main(int argc, char *argv[]) {
3313         int i, bitm, xr, yr;
3314         uint wr, hr;
3315
3316         xw.fw = xw.fh = xw.fx = xw.fy = 0;
3317         xw.isfixed = False;
3318
3319         for(i = 1; i < argc; i++) {
3320                 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
3321                 case 'c':
3322                         if(++i < argc)
3323                                 opt_class = argv[i];
3324                         break;
3325                 case 'e':
3326                         /* eat all remaining arguments */
3327                         if(++i < argc)
3328                                 opt_cmd = &argv[i];
3329                         goto run;
3330                 case 'f':
3331                         if(++i < argc)
3332                                 opt_font = argv[i];
3333                         break;
3334                 case 'g':
3335                         if(++i >= argc)
3336                                 break;
3337
3338                         bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
3339                         if(bitm & XValue)
3340                                 xw.fx = xr;
3341                         if(bitm & YValue)
3342                                 xw.fy = yr;
3343                         if(bitm & WidthValue)
3344                                 xw.fw = (int)wr;
3345                         if(bitm & HeightValue)
3346                                 xw.fh = (int)hr;
3347                         if(bitm & XNegative && xw.fx == 0)
3348                                 xw.fx = -1;
3349                         if(bitm & XNegative && xw.fy == 0)
3350                                 xw.fy = -1;
3351
3352                         if(xw.fh != 0 && xw.fw != 0)
3353                                 xw.isfixed = True;
3354                         break;
3355                 case 'o':
3356                         if(++i < argc)
3357                                 opt_io = argv[i];
3358                         break;
3359                 case 't':
3360                         if(++i < argc)
3361                                 opt_title = argv[i];
3362                         break;
3363                 case 'v':
3364                 default:
3365                         die(USAGE);
3366                 case 'w':
3367                         if(++i < argc)
3368                                 opt_embed = argv[i];
3369                         break;
3370                 }
3371         }
3372
3373 run:
3374         setlocale(LC_CTYPE, "");
3375         XSetLocaleModifiers("");
3376         tnew(80, 24);
3377         xinit();
3378         ttynew();
3379         selinit();
3380         run();
3381
3382         return 0;
3383 }
3384