st.c

   1 /* See LICENSE for licence details. */
   2 #include <ctype.h>
   3 #include <errno.h>
   4 #include <fcntl.h>
   5 #include <limits.h>
   6 #include <locale.h>
   7 #include <pwd.h>
   8 #include <stdarg.h>
   9 #include <stdbool.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <signal.h>
  14 #include <stdint.h>
  15 #include <sys/ioctl.h>
  16 #include <sys/select.h>
  17 #include <sys/stat.h>
  18 #include <sys/time.h>
  19 #include <sys/types.h>
  20 #include <sys/wait.h>
  21 #include <time.h>
  22 #include <unistd.h>
  23 #include <libgen.h>
  24 #include <X11/Xatom.h>
  25 #include <X11/Xlib.h>
  26 #include <X11/Xutil.h>
  27 #include <X11/cursorfont.h>
  28 #include <X11/keysym.h>
  29 #include <X11/Xft/Xft.h>
  30 #include <X11/XKBlib.h>
  31 #include <fontconfig/fontconfig.h>
  32 #include <wchar.h>
  33
  34 #include "arg.h"
  35
  36 char *argv0;
  37
  38 #define Glyph Glyph_
  39 #define Font Font_
  40
  41 #if   defined(__linux)
  42  #include <pty.h>
  43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  44  #include <util.h>
  45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
  46  #include <libutil.h>
  47 #endif
  48
  49
  50 /* XEMBED messages */
  51 #define XEMBED_FOCUS_IN  4
  52 #define XEMBED_FOCUS_OUT 5
  53
  54 /* Arbitrary sizes */
  55 #define UTF_INVALID   0xFFFD
  56 #define UTF_SIZ       4
  57 #define ESC_BUF_SIZ   (128*UTF_SIZ)
  58 #define ESC_ARG_SIZ   16
  59 #define STR_BUF_SIZ   ESC_BUF_SIZ
  60 #define STR_ARG_SIZ   ESC_ARG_SIZ
  61 #define DRAW_BUF_SIZ  20*1024
  62 #define XK_ANY_MOD    UINT_MAX
  63 #define XK_NO_MOD     0
  64 #define XK_SWITCH_MOD (1<<13)
  65
  66 /* macros */
  67 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
  68 #define MAX(a, b)  ((a) < (b) ? (b) : (a))
  69 #define LEN(a)     (sizeof(a) / sizeof(a)[0])
  70 #define DEFAULT(a, b)     (a) = (a) ? (a) : (b)
  71 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
  72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
  73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
  74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
  75 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
  78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
  79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
  80
  81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
  82 #define IS_TRUECOL(x)    (1 << 24 & (x))
  83 #define TRUERED(x)       (((x) & 0xff0000) >> 8)
  84 #define TRUEGREEN(x)     (((x) & 0xff00))
  85 #define TRUEBLUE(x)      (((x) & 0xff) << 8)
  86
  87
  88 enum glyph_attribute {
  89         ATTR_NULL      = 0,
  90         ATTR_BOLD      = 1 << 0,
  91         ATTR_FAINT     = 1 << 1,
  92         ATTR_ITALIC    = 1 << 2,
  93         ATTR_UNDERLINE = 1 << 3,
  94         ATTR_BLINK     = 1 << 4,
  95         ATTR_REVERSE   = 1 << 5,
  96         ATTR_INVISIBLE = 1 << 6,
  97         ATTR_STRUCK    = 1 << 7,
  98         ATTR_WRAP      = 1 << 8,
  99         ATTR_WIDE      = 1 << 9,
 100         ATTR_WDUMMY    = 1 << 10,
 101 };
 102
 103 enum cursor_movement {
 104         CURSOR_SAVE,
 105         CURSOR_LOAD
 106 };
 107
 108 enum cursor_state {
 109         CURSOR_DEFAULT  = 0,
 110         CURSOR_WRAPNEXT = 1,
 111         CURSOR_ORIGIN   = 2
 112 };
 113
 114 enum term_mode {
 115         MODE_WRAP        = 1 << 0,
 116         MODE_INSERT      = 1 << 1,
 117         MODE_APPKEYPAD   = 1 << 2,
 118         MODE_ALTSCREEN   = 1 << 3,
 119         MODE_CRLF        = 1 << 4,
 120         MODE_MOUSEBTN    = 1 << 5,
 121         MODE_MOUSEMOTION = 1 << 6,
 122         MODE_REVERSE     = 1 << 7,
 123         MODE_KBDLOCK     = 1 << 8,
 124         MODE_HIDE        = 1 << 9,
 125         MODE_ECHO        = 1 << 10,
 126         MODE_APPCURSOR   = 1 << 11,
 127         MODE_MOUSESGR    = 1 << 12,
 128         MODE_8BIT        = 1 << 13,
 129         MODE_BLINK       = 1 << 14,
 130         MODE_FBLINK      = 1 << 15,
 131         MODE_FOCUS       = 1 << 16,
 132         MODE_MOUSEX10    = 1 << 17,
 133         MODE_MOUSEMANY   = 1 << 18,
 134         MODE_BRCKTPASTE  = 1 << 19,
 135         MODE_PRINT       = 1 << 20,
 136         MODE_MOUSE       = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
 137                           |MODE_MOUSEMANY,
 138 };
 139
 140 enum charset {
 141         CS_GRAPHIC0,
 142         CS_GRAPHIC1,
 143         CS_UK,
 144         CS_USA,
 145         CS_MULTI,
 146         CS_GER,
 147         CS_FIN
 148 };
 149
 150 enum escape_state {
 151         ESC_START      = 1,
 152         ESC_CSI        = 2,
 153         ESC_STR        = 4,  /* DCS, OSC, PM, APC */
 154         ESC_ALTCHARSET = 8,
 155         ESC_STR_END    = 16, /* a final string was encountered */
 156         ESC_TEST       = 32, /* Enter in test mode */
 157 };
 158
 159 enum window_state {
 160         WIN_VISIBLE = 1,
 161         WIN_REDRAW  = 2,
 162         WIN_FOCUSED = 4
 163 };
 164
 165 enum selection_type {
 166         SEL_REGULAR = 1,
 167         SEL_RECTANGULAR = 2
 168 };
 169
 170 enum selection_snap {
 171         SNAP_WORD = 1,
 172         SNAP_LINE = 2
 173 };
 174
 175 typedef unsigned char uchar;
 176 typedef unsigned int uint;
 177 typedef unsigned long ulong;
 178 typedef unsigned short ushort;
 179
 180 typedef XftDraw *Draw;
 181 typedef XftColor Color;
 182
 183 typedef struct {
 184         char c[UTF_SIZ]; /* character code */
 185         ushort mode;      /* attribute flags */
 186         uint32_t fg;      /* foreground  */
 187         uint32_t bg;      /* background  */
 188 } Glyph;
 189
 190 typedef Glyph *Line;
 191
 192 typedef struct {
 193         Glyph attr; /* current char attributes */
 194         int x;
 195         int y;
 196         char state;
 197 } TCursor;
 198
 199 /* CSI Escape sequence structs */
 200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
 201 typedef struct {
 202         char buf[ESC_BUF_SIZ]; /* raw string */
 203         int len;               /* raw string length */
 204         char priv;
 205         int arg[ESC_ARG_SIZ];
 206         int narg;              /* nb of args */
 207         char mode;
 208 } CSIEscape;
 209
 210 /* STR Escape sequence structs */
 211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
 212 typedef struct {
 213         char type;             /* ESC type ... */
 214         char buf[STR_BUF_SIZ]; /* raw string */
 215         int len;               /* raw string length */
 216         char *args[STR_ARG_SIZ];
 217         int narg;              /* nb of args */
 218 } STREscape;
 219
 220 /* Internal representation of the screen */
 221 typedef struct {
 222         int row;      /* nb row */
 223         int col;      /* nb col */
 224         Line *line;   /* screen */
 225         Line *alt;    /* alternate screen */
 226         bool *dirty;  /* dirtyness of lines */
 227         TCursor c;    /* cursor */
 228         int top;      /* top    scroll limit */
 229         int bot;      /* bottom scroll limit */
 230         int mode;     /* terminal mode flags */
 231         int esc;      /* escape state flags */
 232         char trantbl[4]; /* charset table translation */
 233         int charset;  /* current charset */
 234         int icharset; /* selected charset for sequence */
 235         bool numlock; /* lock numbers in keyboard */
 236         bool *tabs;
 237 } Term;
 238
 239 /* Purely graphic info */
 240 typedef struct {
 241         Display *dpy;
 242         Colormap cmap;
 243         Window win;
 244         Drawable buf;
 245         Atom xembed, wmdeletewin, netwmname, netwmpid;
 246         XIM xim;
 247         XIC xic;
 248         Draw draw;
 249         Visual *vis;
 250         XSetWindowAttributes attrs;
 251         int scr;
 252         bool isfixed; /* is fixed geometry? */
 253         int l, t; /* left and top offset */
 254         int gm; /* geometry mask */
 255         int tw, th; /* tty width and height */
 256         int w, h; /* window width and height */
 257         int ch; /* char height */
 258         int cw; /* char width  */
 259         char state; /* focus, redraw, visible */
 260 } XWindow;
 261
 262 typedef struct {
 263         uint b;
 264         uint mask;
 265         char *s;
 266 } Mousekey;
 267
 268 typedef struct {
 269         KeySym k;
 270         uint mask;
 271         char *s;
 272         /* three valued logic variables: 0 indifferent, 1 on, -1 off */
 273         signed char appkey;    /* application keypad */
 274         signed char appcursor; /* application cursor */
 275         signed char crlf;      /* crlf mode          */
 276 } Key;
 277
 278 typedef struct {
 279         int mode;
 280         int type;
 281         int snap;
 282         /*
 283          * Selection variables:
 284          * nb – normalized coordinates of the beginning of the selection
 285          * ne – normalized coordinates of the end of the selection
 286          * ob – original coordinates of the beginning of the selection
 287          * oe – original coordinates of the end of the selection
 288          */
 289         struct {
 290                 int x, y;
 291         } nb, ne, ob, oe;
 292
 293         char *primary, *clipboard;
 294         Atom xtarget;
 295         bool alt;
 296         struct timespec tclick1;
 297         struct timespec tclick2;
 298 } Selection;
 299
 300 typedef union {
 301         int i;
 302         uint ui;
 303         float f;
 304         const void *v;
 305 } Arg;
 306
 307 typedef struct {
 308         uint mod;
 309         KeySym keysym;
 310         void (*func)(const Arg *);
 311         const Arg arg;
 312 } Shortcut;
 313
 314 /* function definitions used in config.h */
 315 static void clipcopy(const Arg *);
 316 static void clippaste(const Arg *);
 317 static void numlock(const Arg *);
 318 static void selpaste(const Arg *);
 319 static void xzoom(const Arg *);
 320 static void xzoomabs(const Arg *);
 321 static void xzoomreset(const Arg *);
 322 static void printsel(const Arg *);
 323 static void printscreen(const Arg *) ;
 324 static void toggleprinter(const Arg *);
 325
 326 /* Config.h for applying patches and the configuration. */
 327 #include "config.h"
 328
 329 /* Font structure */
 330 typedef struct {
 331         int height;
 332         int width;
 333         int ascent;
 334         int descent;
 335         short lbearing;
 336         short rbearing;
 337         XftFont *match;
 338         FcFontSet *set;
 339         FcPattern *pattern;
 340 } Font;
 341
 342 /* Drawing Context */
 343 typedef struct {
 344         Color col[MAX(LEN(colorname), 256)];
 345         Font font, bfont, ifont, ibfont;
 346         GC gc;
 347 } DC;
 348
 349 static void die(const char *, ...);
 350 static void draw(void);
 351 static void redraw(void);
 352 static void drawregion(int, int, int, int);
 353 static void execsh(void);
 354 static void sigchld(int);
 355 static void run(void);
 356
 357 static void csidump(void);
 358 static void csihandle(void);
 359 static void csiparse(void);
 360 static void csireset(void);
 361 static int eschandle(uchar ascii);
 362 static void strdump(void);
 363 static void strhandle(void);
 364 static void strparse(void);
 365 static void strreset(void);
 366
 367 static int tattrset(int);
 368 static void tprinter(char *, size_t);
 369 static void tdumpsel(void);
 370 static void tdumpline(int);
 371 static void tdump(void);
 372 static void tclearregion(int, int, int, int);
 373 static void tcursor(int);
 374 static void tdeletechar(int);
 375 static void tdeleteline(int);
 376 static void tinsertblank(int);
 377 static void tinsertblankline(int);
 378 static int tlinelen(int);
 379 static void tmoveto(int, int);
 380 static void tmoveato(int, int);
 381 static void tnew(int, int);
 382 static void tnewline(int);
 383 static void tputtab(int);
 384 static void tputc(char *, int);
 385 static void treset(void);
 386 static void tresize(int, int);
 387 static void tscrollup(int, int);
 388 static void tscrolldown(int, int);
 389 static void tsetattr(int *, int);
 390 static void tsetchar(char *, Glyph *, int, int);
 391 static void tsetscroll(int, int);
 392 static void tswapscreen(void);
 393 static void tsetdirt(int, int);
 394 static void tsetdirtattr(int);
 395 static void tsetmode(bool, bool, int *, int);
 396 static void tfulldirt(void);
 397 static void techo(char *, int);
 398 static void tcontrolcode(uchar );
 399 static void tdectest(char );
 400 static int32_t tdefcolor(int *, int *, int);
 401 static void tdeftran(char);
 402 static inline bool match(uint, uint);
 403 static void ttynew(void);
 404 static void ttyread(void);
 405 static void ttyresize(void);
 406 static void ttysend(char *, size_t);
 407 static void ttywrite(const char *, size_t);
 408 static void tstrsequence(uchar c);
 409
 410 static void xdraws(char *, Glyph, int, int, int, int);
 411 static void xhints(void);
 412 static void xclear(int, int, int, int);
 413 static void xdrawcursor(void);
 414 static void xinit(void);
 415 static void xloadcols(void);
 416 static int xsetcolorname(int, const char *);
 417 static int xgeommasktogravity(int);
 418 static int xloadfont(Font *, FcPattern *);
 419 static void xloadfonts(char *, double);
 420 static int xloadfontset(Font *);
 421 static void xsettitle(char *);
 422 static void xresettitle(void);
 423 static void xsetpointermotion(int);
 424 static void xseturgency(int);
 425 static void xsetsel(char *);
 426 static void xtermclear(int, int, int, int);
 427 static void xunloadfont(Font *);
 428 static void xunloadfonts(void);
 429 static void xresize(int, int);
 430
 431 static void expose(XEvent *);
 432 static void visibility(XEvent *);
 433 static void unmap(XEvent *);
 434 static char *kmap(KeySym, uint);
 435 static void kpress(XEvent *);
 436 static void cmessage(XEvent *);
 437 static void cresize(int, int);
 438 static void resize(XEvent *);
 439 static void focus(XEvent *);
 440 static void brelease(XEvent *);
 441 static void bpress(XEvent *);
 442 static void bmotion(XEvent *);
 443 static void selnotify(XEvent *);
 444 static void selclear(XEvent *);
 445 static void selrequest(XEvent *);
 446
 447 static void selinit(void);
 448 static void selnormalize(void);
 449 static inline bool selected(int, int);
 450 static char *getsel(void);
 451 static void selcopy(void);
 452 static void selscroll(int, int);
 453 static void selsnap(int, int *, int *, int);
 454 static void getbuttoninfo(XEvent *);
 455 static void mousereport(XEvent *);
 456
 457 static size_t utf8decode(char *, long *, size_t);
 458 static long utf8decodebyte(char, size_t *);
 459 static size_t utf8encode(long, char *, size_t);
 460 static char utf8encodebyte(long, size_t);
 461 static size_t utf8len(char *);
 462 static size_t utf8validate(long *, size_t);
 463
 464 static ssize_t xwrite(int, const char *, size_t);
 465 static void *xmalloc(size_t);
 466 static void *xrealloc(void *, size_t);
 467 static char *xstrdup(char *);
 468
 469 static void usage(void);
 470
 471 static void (*handler[LASTEvent])(XEvent *) = {
 472         [KeyPress] = kpress,
 473         [ClientMessage] = cmessage,
 474         [ConfigureNotify] = resize,
 475         [VisibilityNotify] = visibility,
 476         [UnmapNotify] = unmap,
 477         [Expose] = expose,
 478         [FocusIn] = focus,
 479         [FocusOut] = focus,
 480         [MotionNotify] = bmotion,
 481         [ButtonPress] = bpress,
 482         [ButtonRelease] = brelease,
 483 /*
 484  * Uncomment if you want the selection to disappear when you select something
 485  * different in another window.
 486  */
 487 /*      [SelectionClear] = selclear, */
 488         [SelectionNotify] = selnotify,
 489         [SelectionRequest] = selrequest,
 490 };
 491
 492 /* Globals */
 493 static DC dc;
 494 static XWindow xw;
 495 static Term term;
 496 static CSIEscape csiescseq;
 497 static STREscape strescseq;
 498 static int cmdfd;
 499 static pid_t pid;
 500 static Selection sel;
 501 static int iofd = STDOUT_FILENO;
 502 static char **opt_cmd = NULL;
 503 static char *opt_io = NULL;
 504 static char *opt_title = NULL;
 505 static char *opt_embed = NULL;
 506 static char *opt_class = NULL;
 507 static char *opt_font = NULL;
 508 static int oldbutton = 3; /* button event on startup: 3 = release */
 509
 510 static char *usedfont = NULL;
 511 static double usedfontsize = 0;
 512 static double defaultfontsize = 0;
 513
 514 static uchar utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
 515 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
 516 static long utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
 517 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
 518
 519 /* Font Ring Cache */
 520 enum {
 521         FRC_NORMAL,
 522         FRC_ITALIC,
 523         FRC_BOLD,
 524         FRC_ITALICBOLD
 525 };
 526
 527 typedef struct {
 528         XftFont *font;
 529         int flags;
 530         long unicodep;
 531 } Fontcache;
 532
 533 /* Fontcache is an array now. A new font will be appended to the array. */
 534 static Fontcache frc[16];
 535 static int frclen = 0;
 536
 537 ssize_t
 538 xwrite(int fd, const char *s, size_t len) {
 539         size_t aux = len;
 540
 541         while(len > 0) {
 542                 ssize_t r = write(fd, s, len);
 543                 if(r < 0)
 544                         return r;
 545                 len -= r;
 546                 s += r;
 547         }
 548         return aux;
 549 }
 550
 551 void *
 552 xmalloc(size_t len) {
 553         void *p = malloc(len);
 554
 555         if(!p)
 556                 die("Out of memory\n");
 557
 558         return p;
 559 }
 560
 561 void *
 562 xrealloc(void *p, size_t len) {
 563         if((p = realloc(p, len)) == NULL)
 564                 die("Out of memory\n");
 565
 566         return p;
 567 }
 568
 569 char *
 570 xstrdup(char *s) {
 571         if((s = strdup(s)) == NULL)
 572                 die("Out of memory\n");
 573
 574         return s;
 575 }
 576
 577 size_t
 578 utf8decode(char *c, long *u, size_t clen) {
 579         size_t i, j, len, type;
 580         long udecoded;
 581
 582         *u = UTF_INVALID;
 583         if(!clen)
 584                 return 0;
 585         udecoded = utf8decodebyte(c[0], &len);
 586         if(!BETWEEN(len, 1, UTF_SIZ))
 587                 return 1;
 588         for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
 589                 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
 590                 if(type != 0)
 591                         return j;
 592         }
 593         if(j < len)
 594                 return 0;
 595         *u = udecoded;
 596         utf8validate(u, len);
 597         return len;
 598 }
 599
 600 long
 601 utf8decodebyte(char c, size_t *i) {
 602         for(*i = 0; *i < LEN(utfmask); ++(*i))
 603                 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
 604                         return (uchar)c & ~utfmask[*i];
 605         return 0;
 606 }
 607
 608 size_t
 609 utf8encode(long u, char *c, size_t clen) {
 610         size_t len, i;
 611
 612         len = utf8validate(&u, 0);
 613         if(clen < len)
 614                 return 0;
 615         for(i = len - 1; i != 0; --i) {
 616                 c[i] = utf8encodebyte(u, 0);
 617                 u >>= 6;
 618         }
 619         c[0] = utf8encodebyte(u, len);
 620         return len;
 621 }
 622
 623 char
 624 utf8encodebyte(long u, size_t i) {
 625         return utfbyte[i] | (u & ~utfmask[i]);
 626 }
 627
 628 size_t
 629 utf8len(char *c) {
 630         return utf8decode(c, &(long){0}, UTF_SIZ);
 631 }
 632
 633 size_t
 634 utf8validate(long *u, size_t i) {
 635         if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
 636                 *u = UTF_INVALID;
 637         for(i = 1; *u > utfmax[i]; ++i)
 638                 ;
 639         return i;
 640 }
 641
 642 static void
 643 selinit(void) {
 644         memset(&sel.tclick1, 0, sizeof(sel.tclick1));
 645         memset(&sel.tclick2, 0, sizeof(sel.tclick2));
 646         sel.mode = 0;
 647         sel.ob.x = -1;
 648         sel.primary = NULL;
 649         sel.clipboard = NULL;
 650         sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
 651         if(sel.xtarget == None)
 652                 sel.xtarget = XA_STRING;
 653 }
 654
 655 static int
 656 x2col(int x) {
 657         x -= borderpx;
 658         x /= xw.cw;
 659
 660         return LIMIT(x, 0, term.col-1);
 661 }
 662
 663 static int
 664 y2row(int y) {
 665         y -= borderpx;
 666         y /= xw.ch;
 667
 668         return LIMIT(y, 0, term.row-1);
 669 }
 670
 671 static int tlinelen(int y) {
 672         int i = term.col;
 673
 674         if(term.line[y][i - 1].mode & ATTR_WRAP)
 675                 return i;
 676
 677         while(i > 0 && term.line[y][i - 1].c[0] == ' ')
 678                 --i;
 679
 680         return i;
 681 }
 682
 683 static void
 684 selnormalize(void) {
 685         int i;
 686
 687         if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
 688                 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
 689                 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
 690         } else {
 691                 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
 692                 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
 693         }
 694         sel.nb.y = MIN(sel.ob.y, sel.oe.y);
 695         sel.ne.y = MAX(sel.ob.y, sel.oe.y);
 696
 697         selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
 698         selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
 699
 700         /* expand selection over line breaks */
 701         if (sel.type == SEL_RECTANGULAR)
 702                 return;
 703         i = tlinelen(sel.nb.y);
 704         if (i < sel.nb.x)
 705                 sel.nb.x = i;
 706         if (tlinelen(sel.ne.y) <= sel.ne.x)
 707                 sel.ne.x = term.col - 1;
 708 }
 709
 710 static inline bool
 711 selected(int x, int y) {
 712         if(sel.type == SEL_RECTANGULAR)
 713                 return BETWEEN(y, sel.nb.y, sel.ne.y)
 714                     && BETWEEN(x, sel.nb.x, sel.ne.x);
 715
 716         return BETWEEN(y, sel.nb.y, sel.ne.y)
 717             && (y != sel.nb.y || x >= sel.nb.x)
 718             && (y != sel.ne.y || x <= sel.ne.x);
 719 }
 720
 721 void
 722 selsnap(int mode, int *x, int *y, int direction) {
 723         int newx, newy, xt, yt;
 724         bool delim, prevdelim;
 725         Glyph *gp, *prevgp;
 726
 727         switch(mode) {
 728         case SNAP_WORD:
 729                 /*
 730                  * Snap around if the word wraps around at the end or
 731                  * beginning of a line.
 732                  */
 733                 prevgp = &term.line[*y][*x];
 734                 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
 735                 for(;;) {
 736                         newx = *x + direction;
 737                         newy = *y;
 738                         if(!BETWEEN(newx, 0, term.col - 1)) {
 739                                 newy += direction;
 740                                 newx = (newx + term.col) % term.col;
 741                                 if (!BETWEEN(newy, 0, term.row - 1))
 742                                         break;
 743
 744                                 if(direction > 0)
 745                                         yt = *y, xt = *x;
 746                                 else
 747                                         yt = newy, xt = newx;
 748                                 if(!(term.line[yt][xt].mode & ATTR_WRAP))
 749                                         break;
 750                         }
 751
 752                         if (newx >= tlinelen(newy))
 753                                 break;
 754
 755                         gp = &term.line[newy][newx];
 756                         delim = strchr(worddelimiters, gp->c[0]) != NULL;
 757                         if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
 758                                         || (delim && gp->c[0] != prevgp->c[0])))
 759                                 break;
 760
 761                         *x = newx;
 762                         *y = newy;
 763                         prevgp = gp;
 764                         prevdelim = delim;
 765                 }
 766                 break;
 767         case SNAP_LINE:
 768                 /*
 769                  * Snap around if the the previous line or the current one
 770                  * has set ATTR_WRAP at its end. Then the whole next or
 771                  * previous line will be selected.
 772                  */
 773                 *x = (direction < 0) ? 0 : term.col - 1;
 774                 if(direction < 0 && *y > 0) {
 775                         for(; *y > 0; *y += direction) {
 776                                 if(!(term.line[*y-1][term.col-1].mode
 777                                                 & ATTR_WRAP)) {
 778                                         break;
 779                                 }
 780                         }
 781                 } else if(direction > 0 && *y < term.row-1) {
 782                         for(; *y < term.row; *y += direction) {
 783                                 if(!(term.line[*y][term.col-1].mode
 784                                                 & ATTR_WRAP)) {
 785                                         break;
 786                                 }
 787                         }
 788                 }
 789                 break;
 790         }
 791 }
 792
 793 void
 794 getbuttoninfo(XEvent *e) {
 795         int type;
 796         uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
 797
 798         sel.alt = IS_SET(MODE_ALTSCREEN);
 799
 800         sel.oe.x = x2col(e->xbutton.x);
 801         sel.oe.y = y2row(e->xbutton.y);
 802         selnormalize();
 803
 804         sel.type = SEL_REGULAR;
 805         for(type = 1; type < LEN(selmasks); ++type) {
 806                 if(match(selmasks[type], state)) {
 807                         sel.type = type;
 808                         break;
 809                 }
 810         }
 811 }
 812
 813 void
 814 mousereport(XEvent *e) {
 815         int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
 816             button = e->xbutton.button, state = e->xbutton.state,
 817             len;
 818         char buf[40];
 819         static int ox, oy;
 820
 821         /* from urxvt */
 822         if(e->xbutton.type == MotionNotify) {
 823                 if(x == ox && y == oy)
 824                         return;
 825                 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
 826                         return;
 827                 /* MOUSE_MOTION: no reporting if no button is pressed */
 828                 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 829                         return;
 830
 831                 button = oldbutton + 32;
 832                 ox = x;
 833                 oy = y;
 834         } else {
 835                 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
 836                         button = 3;
 837                 } else {
 838                         button -= Button1;
 839                         if(button >= 3)
 840                                 button += 64 - 3;
 841                 }
 842                 if(e->xbutton.type == ButtonPress) {
 843                         oldbutton = button;
 844                         ox = x;
 845                         oy = y;
 846                 } else if(e->xbutton.type == ButtonRelease) {
 847                         oldbutton = 3;
 848                         /* MODE_MOUSEX10: no button release reporting */
 849                         if(IS_SET(MODE_MOUSEX10))
 850                                 return;
 851                         if (button == 64 || button == 65)
 852                                 return;
 853                 }
 854         }
 855
 856         if(!IS_SET(MODE_MOUSEX10)) {
 857                 button += (state & ShiftMask   ? 4  : 0)
 858                         + (state & Mod4Mask    ? 8  : 0)
 859                         + (state & ControlMask ? 16 : 0);
 860         }
 861
 862         len = 0;
 863         if(IS_SET(MODE_MOUSESGR)) {
 864                 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
 865                                 button, x+1, y+1,
 866                                 e->xbutton.type == ButtonRelease ? 'm' : 'M');
 867         } else if(x < 223 && y < 223) {
 868                 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
 869                                 32+button, 32+x+1, 32+y+1);
 870         } else {
 871                 return;
 872         }
 873
 874         ttywrite(buf, len);
 875 }
 876
 877 void
 878 bpress(XEvent *e) {
 879         struct timespec now;
 880         Mousekey *mk;
 881
 882         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
 883                 mousereport(e);
 884                 return;
 885         }
 886
 887         for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
 888                 if(e->xbutton.button == mk->b
 889                                 && match(mk->mask, e->xbutton.state)) {
 890                         ttysend(mk->s, strlen(mk->s));
 891                         return;
 892                 }
 893         }
 894
 895         if(e->xbutton.button == Button1) {
 896                 clock_gettime(CLOCK_MONOTONIC, &now);
 897
 898                 /* Clear previous selection, logically and visually. */
 899                 selclear(NULL);
 900                 sel.mode = 1;
 901                 sel.type = SEL_REGULAR;
 902                 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
 903                 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
 904
 905                 /*
 906                  * If the user clicks below predefined timeouts specific
 907                  * snapping behaviour is exposed.
 908                  */
 909                 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
 910                         sel.snap = SNAP_LINE;
 911                 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
 912                         sel.snap = SNAP_WORD;
 913                 } else {
 914                         sel.snap = 0;
 915                 }
 916                 selnormalize();
 917
 918                 /*
 919                  * Draw selection, unless it's regular and we don't want to
 920                  * make clicks visible
 921                  */
 922                 if(sel.snap != 0) {
 923                         sel.mode++;
 924                         tsetdirt(sel.nb.y, sel.ne.y);
 925                 }
 926                 sel.tclick2 = sel.tclick1;
 927                 sel.tclick1 = now;
 928         }
 929 }
 930
 931 char *
 932 getsel(void) {
 933         char *str, *ptr;
 934         int y, bufsize, size, lastx, linelen;
 935         Glyph *gp, *last;
 936
 937         if(sel.ob.x == -1)
 938                 return NULL;
 939
 940         bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
 941         ptr = str = xmalloc(bufsize);
 942
 943         /* append every set & selected glyph to the selection */
 944         for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
 945                 linelen = tlinelen(y);
 946
 947                 if(sel.type == SEL_RECTANGULAR) {
 948                         gp = &term.line[y][sel.nb.x];
 949                         lastx = sel.ne.x;
 950                 } else {
 951                         gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
 952                         lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
 953                 }
 954                 last = &term.line[y][MIN(lastx, linelen-1)];
 955                 while(last >= gp && last->c[0] == ' ')
 956                         --last;
 957
 958                 for( ; gp <= last; ++gp) {
 959                         if(gp->mode & ATTR_WDUMMY)
 960                                 continue;
 961
 962                         size = utf8len(gp->c);
 963                         memcpy(ptr, gp->c, size);
 964                         ptr += size;
 965                 }
 966
 967                 /*
 968                  * Copy and pasting of line endings is inconsistent
 969                  * in the inconsistent terminal and GUI world.
 970                  * The best solution seems like to produce '\n' when
 971                  * something is copied from st and convert '\n' to
 972                  * '\r', when something to be pasted is received by
 973                  * st.
 974                  * FIXME: Fix the computer world.
 975                  */
 976                 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
 977                         *ptr++ = '\n';
 978         }
 979         *ptr = 0;
 980         return str;
 981 }
 982
 983 void
 984 selcopy(void) {
 985         xsetsel(getsel());
 986 }
 987
 988 void
 989 selnotify(XEvent *e) {
 990         ulong nitems, ofs, rem;
 991         int format;
 992         uchar *data, *last, *repl;
 993         Atom type;
 994         XSelectionEvent *xsev;
 995
 996         ofs = 0;
 997         xsev = (XSelectionEvent *)e;
 998         do {
 999                 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1000                                         BUFSIZ/4, False, AnyPropertyType,
1001                                         &type, &format, &nitems, &rem,
1002                                         &data)) {
1003                         fprintf(stderr, "Clipboard allocation failed\n");
1004                         return;
1005                 }
1006
1007                 /*
1008                  * As seen in getsel:
1009                  * Line endings are inconsistent in the terminal and GUI world
1010                  * copy and pasting. When receiving some selection data,
1011                  * replace all '\n' with '\r'.
1012                  * FIXME: Fix the computer world.
1013                  */
1014                 repl = data;
1015                 last = data + nitems * format / 8;
1016                 while((repl = memchr(repl, '\n', last - repl))) {
1017                         *repl++ = '\r';
1018                 }
1019
1020                 if(IS_SET(MODE_BRCKTPASTE))
1021                         ttywrite("\033[200~", 6);
1022                 ttysend((char *)data, nitems * format / 8);
1023                 if(IS_SET(MODE_BRCKTPASTE))
1024                         ttywrite("\033[201~", 6);
1025                 XFree(data);
1026                 /* number of 32-bit chunks returned */
1027                 ofs += nitems * format / 32;
1028         } while(rem > 0);
1029 }
1030
1031 void
1032 selpaste(const Arg *dummy) {
1033         XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1034                         xw.win, CurrentTime);
1035 }
1036
1037 void
1038 clipcopy(const Arg *dummy) {
1039         Atom clipboard;
1040
1041         if(sel.clipboard != NULL)
1042                 free(sel.clipboard);
1043
1044         if(sel.primary != NULL) {
1045                 sel.clipboard = xstrdup(sel.primary);
1046                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1047                 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1048         }
1049 }
1050
1051 void
1052 clippaste(const Arg *dummy) {
1053         Atom clipboard;
1054
1055         clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1056         XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1057                         xw.win, CurrentTime);
1058 }
1059
1060 void
1061 selclear(XEvent *e) {
1062         if(sel.ob.x == -1)
1063                 return;
1064         sel.ob.x = -1;
1065         tsetdirt(sel.nb.y, sel.ne.y);
1066 }
1067
1068 void
1069 selrequest(XEvent *e) {
1070         XSelectionRequestEvent *xsre;
1071         XSelectionEvent xev;
1072         Atom xa_targets, string, clipboard;
1073         char *seltext;
1074
1075         xsre = (XSelectionRequestEvent *) e;
1076         xev.type = SelectionNotify;
1077         xev.requestor = xsre->requestor;
1078         xev.selection = xsre->selection;
1079         xev.target = xsre->target;
1080         xev.time = xsre->time;
1081         /* reject */
1082         xev.property = None;
1083
1084         xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1085         if(xsre->target == xa_targets) {
1086                 /* respond with the supported type */
1087                 string = sel.xtarget;
1088                 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1089                                 XA_ATOM, 32, PropModeReplace,
1090                                 (uchar *) &string, 1);
1091                 xev.property = xsre->property;
1092         } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1093                 /*
1094                  * xith XA_STRING non ascii characters may be incorrect in the
1095                  * requestor. It is not our problem, use utf8.
1096                  */
1097                 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1098                 if(xsre->selection == XA_PRIMARY) {
1099                         seltext = sel.primary;
1100                 } else if(xsre->selection == clipboard) {
1101                         seltext = sel.clipboard;
1102                 } else {
1103                         fprintf(stderr,
1104                                 "Unhandled clipboard selection 0x%lx\n",
1105                                 xsre->selection);
1106                         return;
1107                 }
1108                 if(seltext != NULL) {
1109                         XChangeProperty(xsre->display, xsre->requestor,
1110                                         xsre->property, xsre->target,
1111                                         8, PropModeReplace,
1112                                         (uchar *)seltext, strlen(seltext));
1113                         xev.property = xsre->property;
1114                 }
1115         }
1116
1117         /* all done, send a notification to the listener */
1118         if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1119                 fprintf(stderr, "Error sending SelectionNotify event\n");
1120 }
1121
1122 void
1123 xsetsel(char *str) {
1124         free(sel.primary);
1125         sel.primary = str;
1126
1127         XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1128 }
1129
1130 void
1131 brelease(XEvent *e) {
1132         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1133                 mousereport(e);
1134                 return;
1135         }
1136
1137         if(e->xbutton.button == Button2) {
1138                 selpaste(NULL);
1139         } else if(e->xbutton.button == Button1) {
1140                 if(sel.mode < 2) {
1141                         selclear(NULL);
1142                 } else {
1143                         getbuttoninfo(e);
1144                         selcopy();
1145                 }
1146                 sel.mode = 0;
1147                 tsetdirt(sel.nb.y, sel.ne.y);
1148         }
1149 }
1150
1151 void
1152 bmotion(XEvent *e) {
1153         int oldey, oldex, oldsby, oldsey;
1154
1155         if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1156                 mousereport(e);
1157                 return;
1158         }
1159
1160         if(!sel.mode)
1161                 return;
1162
1163         sel.mode++;
1164         oldey = sel.oe.y;
1165         oldex = sel.oe.x;
1166         oldsby = sel.nb.y;
1167         oldsey = sel.ne.y;
1168         getbuttoninfo(e);
1169
1170         if(oldey != sel.oe.y || oldex != sel.oe.x)
1171                 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1172 }
1173
1174 void
1175 die(const char *errstr, ...) {
1176         va_list ap;
1177
1178         va_start(ap, errstr);
1179         vfprintf(stderr, errstr, ap);
1180         va_end(ap);
1181         exit(EXIT_FAILURE);
1182 }
1183
1184 void
1185 execsh(void) {
1186         char **args, *sh, *prog;
1187         const struct passwd *pw;
1188         char buf[sizeof(long) * 8 + 1];
1189
1190         errno = 0;
1191         if((pw = getpwuid(getuid())) == NULL) {
1192                 if(errno)
1193                         die("getpwuid:%s\n", strerror(errno));
1194                 else
1195                         die("who are you?\n");
1196         }
1197
1198         if (!(sh = getenv("SHELL"))) {
1199                 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1200         }
1201
1202         if(opt_cmd)
1203                 prog = opt_cmd[0];
1204         else if(utmp)
1205                 prog = utmp;
1206         else
1207                 prog = sh;
1208         args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1209
1210         snprintf(buf, sizeof(buf), "%lu", xw.win);
1211
1212         unsetenv("COLUMNS");
1213         unsetenv("LINES");
1214         unsetenv("TERMCAP");
1215         setenv("LOGNAME", pw->pw_name, 1);
1216         setenv("USER", pw->pw_name, 1);
1217         setenv("SHELL", sh, 1);
1218         setenv("HOME", pw->pw_dir, 1);
1219         setenv("TERM", termname, 1);
1220         setenv("WINDOWID", buf, 1);
1221
1222         signal(SIGCHLD, SIG_DFL);
1223         signal(SIGHUP, SIG_DFL);
1224         signal(SIGINT, SIG_DFL);
1225         signal(SIGQUIT, SIG_DFL);
1226         signal(SIGTERM, SIG_DFL);
1227         signal(SIGALRM, SIG_DFL);
1228
1229         execvp(prog, args);
1230         _exit(EXIT_FAILURE);
1231 }
1232
1233 void
1234 sigchld(int a) {
1235         int stat, ret;
1236
1237         if(waitpid(pid, &stat, 0) < 0)
1238                 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1239
1240         ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1241         if (ret != EXIT_SUCCESS)
1242                 die("child finished with error '%d'\n", stat);
1243         exit(EXIT_SUCCESS);
1244 }
1245
1246 void
1247 ttynew(void) {
1248         int m, s;
1249         struct winsize w = {term.row, term.col, 0, 0};
1250
1251         /* seems to work fine on linux, openbsd and freebsd */
1252         if(openpty(&m, &s, NULL, NULL, &w) < 0)
1253                 die("openpty failed: %s\n", strerror(errno));
1254
1255         switch(pid = fork()) {
1256         case -1:
1257                 die("fork failed\n");
1258                 break;
1259         case 0:
1260                 setsid(); /* create a new process group */
1261                 dup2(s, STDIN_FILENO);
1262                 dup2(s, STDOUT_FILENO);
1263                 dup2(s, STDERR_FILENO);
1264                 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1265                         die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1266                 close(s);
1267                 close(m);
1268                 execsh();
1269                 break;
1270         default:
1271                 close(s);
1272                 cmdfd = m;
1273                 signal(SIGCHLD, sigchld);
1274                 if(opt_io) {
1275                         term.mode |= MODE_PRINT;
1276                         iofd = (!strcmp(opt_io, "-")) ?
1277                                   STDOUT_FILENO :
1278                                   open(opt_io, O_WRONLY | O_CREAT, 0666);
1279                         if(iofd < 0) {
1280                                 fprintf(stderr, "Error opening %s:%s\n",
1281                                         opt_io, strerror(errno));
1282                         }
1283                 }
1284                 break;
1285         }
1286 }
1287
1288 void
1289 ttyread(void) {
1290         static char buf[BUFSIZ];
1291         static int buflen = 0;
1292         char *ptr;
1293         char s[UTF_SIZ];
1294         int charsize; /* size of utf8 char in bytes */
1295         long unicodep;
1296         int ret;
1297
1298         /* append read bytes to unprocessed bytes */
1299         if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1300                 die("Couldn't read from shell: %s\n", strerror(errno));
1301
1302         /* process every complete utf8 char */
1303         buflen += ret;
1304         ptr = buf;
1305         while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1306                 utf8encode(unicodep, s, UTF_SIZ);
1307                 tputc(s, charsize);
1308                 ptr += charsize;
1309                 buflen -= charsize;
1310         }
1311
1312         /* keep any uncomplete utf8 char for the next call */
1313         memmove(buf, ptr, buflen);
1314 }
1315
1316 void
1317 ttywrite(const char *s, size_t n) {
1318         if(xwrite(cmdfd, s, n) == -1)
1319                 die("write error on tty: %s\n", strerror(errno));
1320 }
1321
1322 void
1323 ttysend(char *s, size_t n) {
1324         ttywrite(s, n);
1325         if(IS_SET(MODE_ECHO))
1326                 techo(s, n);
1327 }
1328
1329 void
1330 ttyresize(void) {
1331         struct winsize w;
1332
1333         w.ws_row = term.row;
1334         w.ws_col = term.col;
1335         w.ws_xpixel = xw.tw;
1336         w.ws_ypixel = xw.th;
1337         if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1338                 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1339 }
1340
1341 int
1342 tattrset(int attr) {
1343         int i, j;
1344
1345         for(i = 0; i < term.row-1; i++) {
1346                 for(j = 0; j < term.col-1; j++) {
1347                         if(term.line[i][j].mode & attr)
1348                                 return 1;
1349                 }
1350         }
1351
1352         return 0;
1353 }
1354
1355 void
1356 tsetdirt(int top, int bot) {
1357         int i;
1358
1359         LIMIT(top, 0, term.row-1);
1360         LIMIT(bot, 0, term.row-1);
1361
1362         for(i = top; i <= bot; i++)
1363                 term.dirty[i] = 1;
1364 }
1365
1366 void
1367 tsetdirtattr(int attr) {
1368         int i, j;
1369
1370         for(i = 0; i < term.row-1; i++) {
1371                 for(j = 0; j < term.col-1; j++) {
1372                         if(term.line[i][j].mode & attr) {
1373                                 tsetdirt(i, i);
1374                                 break;
1375                         }
1376                 }
1377         }
1378 }
1379
1380 void
1381 tfulldirt(void) {
1382         tsetdirt(0, term.row-1);
1383 }
1384
1385 void
1386 tcursor(int mode) {
1387         static TCursor c[2];
1388         bool alt = IS_SET(MODE_ALTSCREEN);
1389
1390         if(mode == CURSOR_SAVE) {
1391                 c[alt] = term.c;
1392         } else if(mode == CURSOR_LOAD) {
1393                 term.c = c[alt];
1394                 tmoveto(c[alt].x, c[alt].y);
1395         }
1396 }
1397
1398 void
1399 treset(void) {
1400         uint i;
1401
1402         term.c = (TCursor){{
1403                 .mode = ATTR_NULL,
1404                 .fg = defaultfg,
1405                 .bg = defaultbg
1406         }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1407
1408         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1409         for(i = tabspaces; i < term.col; i += tabspaces)
1410                 term.tabs[i] = 1;
1411         term.top = 0;
1412         term.bot = term.row - 1;
1413         term.mode = MODE_WRAP;
1414         memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1415         term.charset = 0;
1416
1417         for(i = 0; i < 2; i++) {
1418                 tmoveto(0, 0);
1419                 tcursor(CURSOR_SAVE);
1420                 tclearregion(0, 0, term.col-1, term.row-1);
1421                 tswapscreen();
1422         }
1423 }
1424
1425 void
1426 tnew(int col, int row) {
1427         term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1428         tresize(col, row);
1429         term.numlock = 1;
1430
1431         treset();
1432 }
1433
1434 void
1435 tswapscreen(void) {
1436         Line *tmp = term.line;
1437
1438         term.line = term.alt;
1439         term.alt = tmp;
1440         term.mode ^= MODE_ALTSCREEN;
1441         tfulldirt();
1442 }
1443
1444 void
1445 tscrolldown(int orig, int n) {
1446         int i;
1447         Line temp;
1448
1449         LIMIT(n, 0, term.bot-orig+1);
1450
1451         tsetdirt(orig, term.bot-n);
1452         tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1453
1454         for(i = term.bot; i >= orig+n; i--) {
1455                 temp = term.line[i];
1456                 term.line[i] = term.line[i-n];
1457                 term.line[i-n] = temp;
1458         }
1459
1460         selscroll(orig, n);
1461 }
1462
1463 void
1464 tscrollup(int orig, int n) {
1465         int i;
1466         Line temp;
1467
1468         LIMIT(n, 0, term.bot-orig+1);
1469
1470         tclearregion(0, orig, term.col-1, orig+n-1);
1471         tsetdirt(orig+n, term.bot);
1472
1473         for(i = orig; i <= term.bot-n; i++) {
1474                 temp = term.line[i];
1475                 term.line[i] = term.line[i+n];
1476                 term.line[i+n] = temp;
1477         }
1478
1479         selscroll(orig, -n);
1480 }
1481
1482 void
1483 selscroll(int orig, int n) {
1484         if(sel.ob.x == -1)
1485                 return;
1486
1487         if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1488                 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1489                         selclear(NULL);
1490                         return;
1491                 }
1492                 if(sel.type == SEL_RECTANGULAR) {
1493                         if(sel.ob.y < term.top)
1494                                 sel.ob.y = term.top;
1495                         if(sel.oe.y > term.bot)
1496                                 sel.oe.y = term.bot;
1497                 } else {
1498                         if(sel.ob.y < term.top) {
1499                                 sel.ob.y = term.top;
1500                                 sel.ob.x = 0;
1501                         }
1502                         if(sel.oe.y > term.bot) {
1503                                 sel.oe.y = term.bot;
1504                                 sel.oe.x = term.col;
1505                         }
1506                 }
1507                 selnormalize();
1508         }
1509 }
1510
1511 void
1512 tnewline(int first_col) {
1513         int y = term.c.y;
1514
1515         if(y == term.bot) {
1516                 tscrollup(term.top, 1);
1517         } else {
1518                 y++;
1519         }
1520         tmoveto(first_col ? 0 : term.c.x, y);
1521 }
1522
1523 void
1524 csiparse(void) {
1525         char *p = csiescseq.buf, *np;
1526         long int v;
1527
1528         csiescseq.narg = 0;
1529         if(*p == '?') {
1530                 csiescseq.priv = 1;
1531                 p++;
1532         }
1533
1534         csiescseq.buf[csiescseq.len] = '\0';
1535         while(p < csiescseq.buf+csiescseq.len) {
1536                 np = NULL;
1537                 v = strtol(p, &np, 10);
1538                 if(np == p)
1539                         v = 0;
1540                 if(v == LONG_MAX || v == LONG_MIN)
1541                         v = -1;
1542                 csiescseq.arg[csiescseq.narg++] = v;
1543                 p = np;
1544                 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1545                         break;
1546                 p++;
1547         }
1548         csiescseq.mode = *p;
1549 }
1550
1551 /* for absolute user moves, when decom is set */
1552 void
1553 tmoveato(int x, int y) {
1554         tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1555 }
1556
1557 void
1558 tmoveto(int x, int y) {
1559         int miny, maxy;
1560
1561         if(term.c.state & CURSOR_ORIGIN) {
1562                 miny = term.top;
1563                 maxy = term.bot;
1564         } else {
1565                 miny = 0;
1566                 maxy = term.row - 1;
1567         }
1568         LIMIT(x, 0, term.col-1);
1569         LIMIT(y, miny, maxy);
1570         term.c.state &= ~CURSOR_WRAPNEXT;
1571         term.c.x = x;
1572         term.c.y = y;
1573 }
1574
1575 void
1576 tsetchar(char *c, Glyph *attr, int x, int y) {
1577         static char *vt100_0[62] = { /* 0x41 - 0x7e */
1578                 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1579                 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1580                 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1581                 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1582                 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1583                 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1584                 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1585                 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1586         };
1587
1588         /*
1589          * The table is proudly stolen from rxvt.
1590          */
1591         if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1592                 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1593                         c = vt100_0[c[0] - 0x41];
1594                 }
1595         }
1596
1597         if(term.line[y][x].mode & ATTR_WIDE) {
1598                 if(x+1 < term.col) {
1599                         term.line[y][x+1].c[0] = ' ';
1600                         term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1601                 }
1602         } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1603                 term.line[y][x-1].c[0] = ' ';
1604                 term.line[y][x-1].mode &= ~ATTR_WIDE;
1605         }
1606
1607         term.dirty[y] = 1;
1608         term.line[y][x] = *attr;
1609         memcpy(term.line[y][x].c, c, UTF_SIZ);
1610 }
1611
1612 void
1613 tclearregion(int x1, int y1, int x2, int y2) {
1614         int x, y, temp;
1615         Glyph *gp;
1616
1617         if(x1 > x2)
1618                 temp = x1, x1 = x2, x2 = temp;
1619         if(y1 > y2)
1620                 temp = y1, y1 = y2, y2 = temp;
1621
1622         LIMIT(x1, 0, term.col-1);
1623         LIMIT(x2, 0, term.col-1);
1624         LIMIT(y1, 0, term.row-1);
1625         LIMIT(y2, 0, term.row-1);
1626
1627         for(y = y1; y <= y2; y++) {
1628                 term.dirty[y] = 1;
1629                 for(x = x1; x <= x2; x++) {
1630                         gp = &term.line[y][x];
1631                         if(selected(x, y))
1632                                 selclear(NULL);
1633                         gp->fg = term.c.attr.fg;
1634                         gp->bg = term.c.attr.bg;
1635                         gp->mode = 0;
1636                         memcpy(gp->c, " ", 2);
1637                 }
1638         }
1639 }
1640
1641 void
1642 tdeletechar(int n) {
1643         int dst, src, size;
1644         Glyph *line;
1645
1646         LIMIT(n, 0, term.col - term.c.x);
1647
1648         dst = term.c.x;
1649         src = term.c.x + n;
1650         size = term.col - src;
1651         line = term.line[term.c.y];
1652
1653         memmove(&line[dst], &line[src], size * sizeof(Glyph));
1654         tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1655 }
1656
1657 void
1658 tinsertblank(int n) {
1659         int dst, src, size;
1660         Glyph *line;
1661
1662         LIMIT(n, 0, term.col - term.c.x);
1663
1664         dst = term.c.x + n;
1665         src = term.c.x;
1666         size = term.col - dst;
1667         line = term.line[term.c.y];
1668
1669         memmove(&line[dst], &line[src], size * sizeof(Glyph));
1670         tclearregion(src, term.c.y, dst - 1, term.c.y);
1671 }
1672
1673 void
1674 tinsertblankline(int n) {
1675         if(BETWEEN(term.c.y, term.top, term.bot))
1676                 tscrolldown(term.c.y, n);
1677 }
1678
1679 void
1680 tdeleteline(int n) {
1681         if(BETWEEN(term.c.y, term.top, term.bot))
1682                 tscrollup(term.c.y, n);
1683 }
1684
1685 int32_t
1686 tdefcolor(int *attr, int *npar, int l) {
1687         int32_t idx = -1;
1688         uint r, g, b;
1689
1690         switch (attr[*npar + 1]) {
1691         case 2: /* direct color in RGB space */
1692                 if (*npar + 4 >= l) {
1693                         fprintf(stderr,
1694                                 "erresc(38): Incorrect number of parameters (%d)\n",
1695                                 *npar);
1696                         break;
1697                 }
1698                 r = attr[*npar + 2];
1699                 g = attr[*npar + 3];
1700                 b = attr[*npar + 4];
1701                 *npar += 4;
1702                 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1703                         fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1704                                 r, g, b);
1705                 else
1706                         idx = TRUECOLOR(r, g, b);
1707                 break;
1708         case 5: /* indexed color */
1709                 if (*npar + 2 >= l) {
1710                         fprintf(stderr,
1711                                 "erresc(38): Incorrect number of parameters (%d)\n",
1712                                 *npar);
1713                         break;
1714                 }
1715                 *npar += 2;
1716                 if(!BETWEEN(attr[*npar], 0, 255))
1717                         fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1718                 else
1719                         idx = attr[*npar];
1720                 break;
1721         case 0: /* implemented defined (only foreground) */
1722         case 1: /* transparent */
1723         case 3: /* direct color in CMY space */
1724         case 4: /* direct color in CMYK space */
1725         default:
1726                 fprintf(stderr,
1727                         "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1728                 break;
1729         }
1730
1731         return idx;
1732 }
1733
1734 void
1735 tsetattr(int *attr, int l) {
1736         int i;
1737         int32_t idx;
1738
1739         for(i = 0; i < l; i++) {
1740                 switch(attr[i]) {
1741                 case 0:
1742                         term.c.attr.mode &= ~(
1743                                 ATTR_BOLD       |
1744                                 ATTR_FAINT      |
1745                                 ATTR_ITALIC     |
1746                                 ATTR_UNDERLINE  |
1747                                 ATTR_BLINK      |
1748                                 ATTR_REVERSE    |
1749                                 ATTR_INVISIBLE  |
1750                                 ATTR_STRUCK     );
1751                         term.c.attr.fg = defaultfg;
1752                         term.c.attr.bg = defaultbg;
1753                         break;
1754                 case 1:
1755                         term.c.attr.mode |= ATTR_BOLD;
1756                         break;
1757                 case 2:
1758                         term.c.attr.mode |= ATTR_FAINT;
1759                         break;
1760                 case 3:
1761                         term.c.attr.mode |= ATTR_ITALIC;
1762                         break;
1763                 case 4:
1764                         term.c.attr.mode |= ATTR_UNDERLINE;
1765                         break;
1766                 case 5: /* slow blink */
1767                         /* FALLTHROUGH */
1768                 case 6: /* rapid blink */
1769                         term.c.attr.mode |= ATTR_BLINK;
1770                         break;
1771                 case 7:
1772                         term.c.attr.mode |= ATTR_REVERSE;
1773                         break;
1774                 case 8:
1775                         term.c.attr.mode |= ATTR_INVISIBLE;
1776                         break;
1777                 case 9:
1778                         term.c.attr.mode |= ATTR_STRUCK;
1779                         break;
1780                 case 22:
1781                         term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1782                         break;
1783                 case 23:
1784                         term.c.attr.mode &= ~ATTR_ITALIC;
1785                         break;
1786                 case 24:
1787                         term.c.attr.mode &= ~ATTR_UNDERLINE;
1788                         break;
1789                 case 25:
1790                         term.c.attr.mode &= ~ATTR_BLINK;
1791                         break;
1792                 case 27:
1793                         term.c.attr.mode &= ~ATTR_REVERSE;
1794                         break;
1795                 case 28:
1796                         term.c.attr.mode &= ~ATTR_INVISIBLE;
1797                         break;
1798                 case 29:
1799                         term.c.attr.mode &= ~ATTR_STRUCK;
1800                         break;
1801                 case 38:
1802                         if ((idx = tdefcolor(attr, &i, l)) >= 0)
1803                                 term.c.attr.fg = idx;
1804                         break;
1805                 case 39:
1806                         term.c.attr.fg = defaultfg;
1807                         break;
1808                 case 48:
1809                         if ((idx = tdefcolor(attr, &i, l)) >= 0)
1810                                 term.c.attr.bg = idx;
1811                         break;
1812                 case 49:
1813                         term.c.attr.bg = defaultbg;
1814                         break;
1815                 default:
1816                         if(BETWEEN(attr[i], 30, 37)) {
1817                                 term.c.attr.fg = attr[i] - 30;
1818                         } else if(BETWEEN(attr[i], 40, 47)) {
1819                                 term.c.attr.bg = attr[i] - 40;
1820                         } else if(BETWEEN(attr[i], 90, 97)) {
1821                                 term.c.attr.fg = attr[i] - 90 + 8;
1822                         } else if(BETWEEN(attr[i], 100, 107)) {
1823                                 term.c.attr.bg = attr[i] - 100 + 8;
1824                         } else {
1825                                 fprintf(stderr,
1826                                         "erresc(default): gfx attr %d unknown\n",
1827                                         attr[i]), csidump();
1828                         }
1829                         break;
1830                 }
1831         }
1832 }
1833
1834 void
1835 tsetscroll(int t, int b) {
1836         int temp;
1837
1838         LIMIT(t, 0, term.row-1);
1839         LIMIT(b, 0, term.row-1);
1840         if(t > b) {
1841                 temp = t;
1842                 t = b;
1843                 b = temp;
1844         }
1845         term.top = t;
1846         term.bot = b;
1847 }
1848
1849 void
1850 tsetmode(bool priv, bool set, int *args, int narg) {
1851         int *lim, mode;
1852         bool alt;
1853
1854         for(lim = args + narg; args < lim; ++args) {
1855                 if(priv) {
1856                         switch(*args) {
1857                         case 1: /* DECCKM -- Cursor key */
1858                                 MODBIT(term.mode, set, MODE_APPCURSOR);
1859                                 break;
1860                         case 5: /* DECSCNM -- Reverse video */
1861                                 mode = term.mode;
1862                                 MODBIT(term.mode, set, MODE_REVERSE);
1863                                 if(mode != term.mode)
1864                                         redraw();
1865                                 break;
1866                         case 6: /* DECOM -- Origin */
1867                                 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1868                                 tmoveato(0, 0);
1869                                 break;
1870                         case 7: /* DECAWM -- Auto wrap */
1871                                 MODBIT(term.mode, set, MODE_WRAP);
1872                                 break;
1873                         case 0:  /* Error (IGNORED) */
1874                         case 2:  /* DECANM -- ANSI/VT52 (IGNORED) */
1875                         case 3:  /* DECCOLM -- Column  (IGNORED) */
1876                         case 4:  /* DECSCLM -- Scroll (IGNORED) */
1877                         case 8:  /* DECARM -- Auto repeat (IGNORED) */
1878                         case 18: /* DECPFF -- Printer feed (IGNORED) */
1879                         case 19: /* DECPEX -- Printer extent (IGNORED) */
1880                         case 42: /* DECNRCM -- National characters (IGNORED) */
1881                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
1882                                 break;
1883                         case 25: /* DECTCEM -- Text Cursor Enable Mode */
1884                                 MODBIT(term.mode, !set, MODE_HIDE);
1885                                 break;
1886                         case 9:    /* X10 mouse compatibility mode */
1887                                 xsetpointermotion(0);
1888                                 MODBIT(term.mode, 0, MODE_MOUSE);
1889                                 MODBIT(term.mode, set, MODE_MOUSEX10);
1890                                 break;
1891                         case 1000: /* 1000: report button press */
1892                                 xsetpointermotion(0);
1893                                 MODBIT(term.mode, 0, MODE_MOUSE);
1894                                 MODBIT(term.mode, set, MODE_MOUSEBTN);
1895                                 break;
1896                         case 1002: /* 1002: report motion on button press */
1897                                 xsetpointermotion(0);
1898                                 MODBIT(term.mode, 0, MODE_MOUSE);
1899                                 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1900                                 break;
1901                         case 1003: /* 1003: enable all mouse motions */
1902                                 xsetpointermotion(set);
1903                                 MODBIT(term.mode, 0, MODE_MOUSE);
1904                                 MODBIT(term.mode, set, MODE_MOUSEMANY);
1905                                 break;
1906                         case 1004: /* 1004: send focus events to tty */
1907                                 MODBIT(term.mode, set, MODE_FOCUS);
1908                                 break;
1909                         case 1006: /* 1006: extended reporting mode */
1910                                 MODBIT(term.mode, set, MODE_MOUSESGR);
1911                                 break;
1912                         case 1034:
1913                                 MODBIT(term.mode, set, MODE_8BIT);
1914                                 break;
1915                         case 1049: /* swap screen & set/restore cursor as xterm */
1916                                 if (!allowaltscreen)
1917                                         break;
1918                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1919                                 /* FALLTHROUGH */
1920                         case 47: /* swap screen */
1921                         case 1047:
1922                                 if (!allowaltscreen)
1923                                         break;
1924                                 alt = IS_SET(MODE_ALTSCREEN);
1925                                 if(alt) {
1926                                         tclearregion(0, 0, term.col-1,
1927                                                         term.row-1);
1928                                 }
1929                                 if(set ^ alt) /* set is always 1 or 0 */
1930                                         tswapscreen();
1931                                 if(*args != 1049)
1932                                         break;
1933                                 /* FALLTHROUGH */
1934                         case 1048:
1935                                 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1936                                 break;
1937                         case 2004: /* 2004: bracketed paste mode */
1938                                 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1939                                 break;
1940                         /* Not implemented mouse modes. See comments there. */
1941                         case 1001: /* mouse highlight mode; can hang the
1942                                       terminal by design when implemented. */
1943                         case 1005: /* UTF-8 mouse mode; will confuse
1944                                       applications not supporting UTF-8
1945                                       and luit. */
1946                         case 1015: /* urxvt mangled mouse mode; incompatible
1947                                       and can be mistaken for other control
1948                                       codes. */
1949                         default:
1950                                 fprintf(stderr,
1951                                         "erresc: unknown private set/reset mode %d\n",
1952                                         *args);
1953                                 break;
1954                         }
1955                 } else {
1956                         switch(*args) {
1957                         case 0:  /* Error (IGNORED) */
1958                                 break;
1959                         case 2:  /* KAM -- keyboard action */
1960                                 MODBIT(term.mode, set, MODE_KBDLOCK);
1961                                 break;
1962                         case 4:  /* IRM -- Insertion-replacement */
1963                                 MODBIT(term.mode, set, MODE_INSERT);
1964                                 break;
1965                         case 12: /* SRM -- Send/Receive */
1966                                 MODBIT(term.mode, !set, MODE_ECHO);
1967                                 break;
1968                         case 20: /* LNM -- Linefeed/new line */
1969                                 MODBIT(term.mode, set, MODE_CRLF);
1970                                 break;
1971                         default:
1972                                 fprintf(stderr,
1973                                         "erresc: unknown set/reset mode %d\n",
1974                                         *args);
1975                                 break;
1976                         }
1977                 }
1978         }
1979 }
1980
1981 void
1982 csihandle(void) {
1983         char buf[40];
1984         int len;
1985
1986         switch(csiescseq.mode) {
1987         default:
1988         unknown:
1989                 fprintf(stderr, "erresc: unknown csi ");
1990                 csidump();
1991                 /* die(""); */
1992                 break;
1993         case '@': /* ICH -- Insert <n> blank char */
1994                 DEFAULT(csiescseq.arg[0], 1);
1995                 tinsertblank(csiescseq.arg[0]);
1996                 break;
1997         case 'A': /* CUU -- Cursor <n> Up */
1998                 DEFAULT(csiescseq.arg[0], 1);
1999                 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2000                 break;
2001         case 'B': /* CUD -- Cursor <n> Down */
2002         case 'e': /* VPR --Cursor <n> Down */
2003                 DEFAULT(csiescseq.arg[0], 1);
2004                 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2005                 break;
2006         case 'i': /* MC -- Media Copy */
2007                 switch(csiescseq.arg[0]) {
2008                 case 0:
2009                         tdump();
2010                         break;
2011                 case 1:
2012                         tdumpline(term.c.y);
2013                         break;
2014                 case 2:
2015                         tdumpsel();
2016                         break;
2017                 case 4:
2018                         term.mode &= ~MODE_PRINT;
2019                         break;
2020                 case 5:
2021                         term.mode |= MODE_PRINT;
2022                         break;
2023                 }
2024                 break;
2025         case 'c': /* DA -- Device Attributes */
2026                 if(csiescseq.arg[0] == 0)
2027                         ttywrite(vtiden, sizeof(vtiden) - 1);
2028                 break;
2029         case 'C': /* CUF -- Cursor <n> Forward */
2030         case 'a': /* HPR -- Cursor <n> Forward */
2031                 DEFAULT(csiescseq.arg[0], 1);
2032                 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2033                 break;
2034         case 'D': /* CUB -- Cursor <n> Backward */
2035                 DEFAULT(csiescseq.arg[0], 1);
2036                 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2037                 break;
2038         case 'E': /* CNL -- Cursor <n> Down and first col */
2039                 DEFAULT(csiescseq.arg[0], 1);
2040                 tmoveto(0, term.c.y+csiescseq.arg[0]);
2041                 break;
2042         case 'F': /* CPL -- Cursor <n> Up and first col */
2043                 DEFAULT(csiescseq.arg[0], 1);
2044                 tmoveto(0, term.c.y-csiescseq.arg[0]);
2045                 break;
2046         case 'g': /* TBC -- Tabulation clear */
2047                 switch(csiescseq.arg[0]) {
2048                 case 0: /* clear current tab stop */
2049                         term.tabs[term.c.x] = 0;
2050                         break;
2051                 case 3: /* clear all the tabs */
2052                         memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2053                         break;
2054                 default:
2055                         goto unknown;
2056                 }
2057                 break;
2058         case 'G': /* CHA -- Move to <col> */
2059         case '`': /* HPA */
2060                 DEFAULT(csiescseq.arg[0], 1);
2061                 tmoveto(csiescseq.arg[0]-1, term.c.y);
2062                 break;
2063         case 'H': /* CUP -- Move to <row> <col> */
2064         case 'f': /* HVP */
2065                 DEFAULT(csiescseq.arg[0], 1);
2066                 DEFAULT(csiescseq.arg[1], 1);
2067                 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2068                 break;
2069         case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2070                 DEFAULT(csiescseq.arg[0], 1);
2071                 tputtab(csiescseq.arg[0]);
2072                 break;
2073         case 'J': /* ED -- Clear screen */
2074                 selclear(NULL);
2075                 switch(csiescseq.arg[0]) {
2076                 case 0: /* below */
2077                         tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2078                         if(term.c.y < term.row-1) {
2079                                 tclearregion(0, term.c.y+1, term.col-1,
2080                                                 term.row-1);
2081                         }
2082                         break;
2083                 case 1: /* above */
2084                         if(term.c.y > 1)
2085                                 tclearregion(0, 0, term.col-1, term.c.y-1);
2086                         tclearregion(0, term.c.y, term.c.x, term.c.y);
2087                         break;
2088                 case 2: /* all */
2089                         tclearregion(0, 0, term.col-1, term.row-1);
2090                         break;
2091                 default:
2092                         goto unknown;
2093                 }
2094                 break;
2095         case 'K': /* EL -- Clear line */
2096                 switch(csiescseq.arg[0]) {
2097                 case 0: /* right */
2098                         tclearregion(term.c.x, term.c.y, term.col-1,
2099                                         term.c.y);
2100                         break;
2101                 case 1: /* left */
2102                         tclearregion(0, term.c.y, term.c.x, term.c.y);
2103                         break;
2104                 case 2: /* all */
2105                         tclearregion(0, term.c.y, term.col-1, term.c.y);
2106                         break;
2107                 }
2108                 break;
2109         case 'S': /* SU -- Scroll <n> line up */
2110                 DEFAULT(csiescseq.arg[0], 1);
2111                 tscrollup(term.top, csiescseq.arg[0]);
2112                 break;
2113         case 'T': /* SD -- Scroll <n> line down */
2114                 DEFAULT(csiescseq.arg[0], 1);
2115                 tscrolldown(term.top, csiescseq.arg[0]);
2116                 break;
2117         case 'L': /* IL -- Insert <n> blank lines */
2118                 DEFAULT(csiescseq.arg[0], 1);
2119                 tinsertblankline(csiescseq.arg[0]);
2120                 break;
2121         case 'l': /* RM -- Reset Mode */
2122                 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2123                 break;
2124         case 'M': /* DL -- Delete <n> lines */
2125                 DEFAULT(csiescseq.arg[0], 1);
2126                 tdeleteline(csiescseq.arg[0]);
2127                 break;
2128         case 'X': /* ECH -- Erase <n> char */
2129                 DEFAULT(csiescseq.arg[0], 1);
2130                 tclearregion(term.c.x, term.c.y,
2131                                 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2132                 break;
2133         case 'P': /* DCH -- Delete <n> char */
2134                 DEFAULT(csiescseq.arg[0], 1);
2135                 tdeletechar(csiescseq.arg[0]);
2136                 break;
2137         case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2138                 DEFAULT(csiescseq.arg[0], 1);
2139                 tputtab(-csiescseq.arg[0]);
2140                 break;
2141         case 'd': /* VPA -- Move to <row> */
2142                 DEFAULT(csiescseq.arg[0], 1);
2143                 tmoveato(term.c.x, csiescseq.arg[0]-1);
2144                 break;
2145         case 'h': /* SM -- Set terminal mode */
2146                 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2147                 break;
2148         case 'm': /* SGR -- Terminal attribute (color) */
2149                 tsetattr(csiescseq.arg, csiescseq.narg);
2150                 break;
2151         case 'n': /* DSR – Device Status Report (cursor position) */
2152                 if (csiescseq.arg[0] == 6) {
2153                         len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2154                                         term.c.y+1, term.c.x+1);
2155                         ttywrite(buf, len);
2156                 }
2157                 break;
2158         case 'r': /* DECSTBM -- Set Scrolling Region */
2159                 if(csiescseq.priv) {
2160                         goto unknown;
2161                 } else {
2162                         DEFAULT(csiescseq.arg[0], 1);
2163                         DEFAULT(csiescseq.arg[1], term.row);
2164                         tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2165                         tmoveato(0, 0);
2166                 }
2167                 break;
2168         case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2169                 tcursor(CURSOR_SAVE);
2170                 break;
2171         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2172                 tcursor(CURSOR_LOAD);
2173                 break;
2174         }
2175 }
2176
2177 void
2178 csidump(void) {
2179         int i;
2180         uint c;
2181
2182         printf("ESC[");
2183         for(i = 0; i < csiescseq.len; i++) {
2184                 c = csiescseq.buf[i] & 0xff;
2185                 if(isprint(c)) {
2186                         putchar(c);
2187                 } else if(c == '\n') {
2188                         printf("(\\n)");
2189                 } else if(c == '\r') {
2190                         printf("(\\r)");
2191                 } else if(c == 0x1b) {
2192                         printf("(\\e)");
2193                 } else {
2194                         printf("(%02x)", c);
2195                 }
2196         }
2197         putchar('\n');
2198 }
2199
2200 void
2201 csireset(void) {
2202         memset(&csiescseq, 0, sizeof(csiescseq));
2203 }
2204
2205 void
2206 strhandle(void) {
2207         char *p = NULL;
2208         int j, narg, par;
2209
2210         term.esc &= ~(ESC_STR_END|ESC_STR);
2211         strparse();
2212         narg = strescseq.narg;
2213         par = atoi(strescseq.args[0]);
2214
2215         switch(strescseq.type) {
2216         case ']': /* OSC -- Operating System Command */
2217                 switch(par) {
2218                 case 0:
2219                 case 1:
2220                 case 2:
2221                         if(narg > 1)
2222                                 xsettitle(strescseq.args[1]);
2223                         return;
2224                 case 4: /* color set */
2225                         if(narg < 3)
2226                                 break;
2227                         p = strescseq.args[2];
2228                         /* FALLTHROUGH */
2229                 case 104: /* color reset, here p = NULL */
2230                         j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2231                         if(xsetcolorname(j, p)) {
2232                                 fprintf(stderr, "erresc: invalid color %s\n", p);
2233                         } else {
2234                                 /*
2235                                  * TODO if defaultbg color is changed, borders
2236                                  * are dirty
2237                                  */
2238                                 redraw();
2239                         }
2240                         return;
2241                 }
2242                 break;
2243         case 'k': /* old title set compatibility */
2244                 xsettitle(strescseq.args[0]);
2245                 return;
2246         case 'P': /* DCS -- Device Control String */
2247         case '_': /* APC -- Application Program Command */
2248         case '^': /* PM -- Privacy Message */
2249                 return;
2250         }
2251
2252         fprintf(stderr, "erresc: unknown str ");
2253         strdump();
2254 }
2255
2256 void
2257 strparse(void) {
2258         char *p = strescseq.buf;
2259
2260         strescseq.narg = 0;
2261         strescseq.buf[strescseq.len] = '\0';
2262         while(p && strescseq.narg < STR_ARG_SIZ)
2263                 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2264 }
2265
2266 void
2267 strdump(void) {
2268         int i;
2269         uint c;
2270
2271         printf("ESC%c", strescseq.type);
2272         for(i = 0; i < strescseq.len; i++) {
2273                 c = strescseq.buf[i] & 0xff;
2274                 if(c == '\0') {
2275                         return;
2276                 } else if(isprint(c)) {
2277                         putchar(c);
2278                 } else if(c == '\n') {
2279                         printf("(\\n)");
2280                 } else if(c == '\r') {
2281                         printf("(\\r)");
2282                 } else if(c == 0x1b) {
2283                         printf("(\\e)");
2284                 } else {
2285                         printf("(%02x)", c);
2286                 }
2287         }
2288         printf("ESC\\\n");
2289 }
2290
2291 void
2292 strreset(void) {
2293         memset(&strescseq, 0, sizeof(strescseq));
2294 }
2295
2296 void
2297 tprinter(char *s, size_t len) {
2298         if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2299                 fprintf(stderr, "Error writing in %s:%s\n",
2300                         opt_io, strerror(errno));
2301                 close(iofd);
2302                 iofd = -1;
2303         }
2304 }
2305
2306 void
2307 toggleprinter(const Arg *arg) {
2308         term.mode ^= MODE_PRINT;
2309 }
2310
2311 void
2312 printscreen(const Arg *arg) {
2313         tdump();
2314 }
2315
2316 void
2317 printsel(const Arg *arg) {
2318         tdumpsel();
2319 }
2320
2321 void
2322 tdumpsel(void) {
2323         char *ptr;
2324
2325         if((ptr = getsel())) {
2326                 tprinter(ptr, strlen(ptr));
2327                 free(ptr);
2328         }
2329 }
2330
2331 void
2332 tdumpline(int n) {
2333         Glyph *bp, *end;
2334
2335         bp = &term.line[n][0];
2336         end = &bp[MIN(tlinelen(n), term.col) - 1];
2337         if(bp != end || bp->c[0] != ' ') {
2338                 for( ;bp <= end; ++bp)
2339                         tprinter(bp->c, utf8len(bp->c));
2340         }
2341         tprinter("\n", 1);
2342 }
2343
2344 void
2345 tdump(void) {
2346         int i;
2347
2348         for(i = 0; i < term.row; ++i)
2349                 tdumpline(i);
2350 }
2351
2352 void
2353 tputtab(int n) {
2354         uint x = term.c.x;
2355
2356         if(n > 0) {
2357                 while(x < term.col && n--)
2358                         for(++x; x < term.col && !term.tabs[x]; ++x)
2359                                 /* nothing */ ;
2360         } else if(n < 0) {
2361                 while(x > 0 && n++)
2362                         for(--x; x > 0 && !term.tabs[x]; --x)
2363                                 /* nothing */ ;
2364         }
2365         tmoveto(x, term.c.y);
2366 }
2367
2368 void
2369 techo(char *buf, int len) {
2370         for(; len > 0; buf++, len--) {
2371                 char c = *buf;
2372
2373                 if(ISCONTROL((uchar) c)) { /* control code */
2374                         if(c & 0x80) {
2375                                 c &= 0x7f;
2376                                 tputc("^", 1);
2377                                 tputc("[", 1);
2378                         } else if(c != '\n' && c != '\r' && c != '\t') {
2379                                 c ^= 0x40;
2380                                 tputc("^", 1);
2381                         }
2382                         tputc(&c, 1);
2383                 } else {
2384                         break;
2385                 }
2386         }
2387         if(len)
2388                 tputc(buf, len);
2389 }
2390
2391 void
2392 tdeftran(char ascii) {
2393         static char cs[] = "0B";
2394         static int vcs[] = {CS_GRAPHIC0, CS_USA};
2395         char *p;
2396
2397         if((p = strchr(cs, ascii)) == NULL) {
2398                 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2399         } else {
2400                 term.trantbl[term.icharset] = vcs[p - cs];
2401         }
2402 }
2403
2404 void
2405 tdectest(char c) {
2406         static char E[UTF_SIZ] = "E";
2407         int x, y;
2408
2409         if(c == '8') { /* DEC screen alignment test. */
2410                 for(x = 0; x < term.col; ++x) {
2411                         for(y = 0; y < term.row; ++y)
2412                                 tsetchar(E, &term.c.attr, x, y);
2413                 }
2414         }
2415 }
2416
2417 void
2418 tstrsequence(uchar c) {
2419         if (c & 0x80) {
2420                 switch (c) {
2421                 case 0x90:   /* DCS -- Device Control String */
2422                         c = 'P';
2423                         break;
2424                 case 0x9f:   /* APC -- Application Program Command */
2425                         c = '_';
2426                         break;
2427                 case 0x9e:   /* PM -- Privacy Message */
2428                         c = '^';
2429                         break;
2430                 case 0x9d:   /* OSC -- Operating System Command */
2431                         c = ']';
2432                         break;
2433                 }
2434         }
2435         strreset();
2436         strescseq.type = c;
2437         term.esc |= ESC_STR;
2438         return;
2439 }
2440
2441 void
2442 tcontrolcode(uchar ascii) {
2443         static char question[UTF_SIZ] = "?";
2444
2445         switch(ascii) {
2446         case '\t':   /* HT */
2447                 tputtab(1);
2448                 return;
2449         case '\b':   /* BS */
2450                 tmoveto(term.c.x-1, term.c.y);
2451                 return;
2452         case '\r':   /* CR */
2453                 tmoveto(0, term.c.y);
2454                 return;
2455         case '\f':   /* LF */
2456         case '\v':   /* VT */
2457         case '\n':   /* LF */
2458                 /* go to first col if the mode is set */
2459                 tnewline(IS_SET(MODE_CRLF));
2460                 return;
2461         case '\a':   /* BEL */
2462                 if(term.esc & ESC_STR_END) {
2463                         /* backwards compatibility to xterm */
2464                         strhandle();
2465                 } else {
2466                         if(!(xw.state & WIN_FOCUSED))
2467                                 xseturgency(1);
2468                         if (bellvolume)
2469                                 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2470                 }
2471                 break;
2472         case '\033': /* ESC */
2473                 csireset();
2474                 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2475                 term.esc |= ESC_START;
2476                 return;
2477         case '\016': /* SO (LS1 -- Locking shift 1) */
2478         case '\017': /* SI (LS0 -- Locking shift 0) */
2479                 term.charset = 1 - (ascii - '\016');
2480                 return;
2481         case '\032': /* SUB */
2482                 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2483         case '\030': /* CAN */
2484                 csireset();
2485                 break;
2486         case '\005': /* ENQ (IGNORED) */
2487         case '\000': /* NUL (IGNORED) */
2488         case '\021': /* XON (IGNORED) */
2489         case '\023': /* XOFF (IGNORED) */
2490         case 0177:   /* DEL (IGNORED) */
2491                 return;
2492         case 0x84:   /* TODO: IND */
2493                 break;
2494         case 0x85:   /* NEL -- Next line */
2495                 tnewline(1); /* always go to first col */
2496                 break;
2497         case 0x88:   /* HTS -- Horizontal tab stop */
2498                 term.tabs[term.c.x] = 1;
2499                 break;
2500         case 0x8d:   /* TODO: RI */
2501         case 0x8e:   /* TODO: SS2 */
2502         case 0x8f:   /* TODO: SS3 */
2503         case 0x98:   /* TODO: SOS */
2504                 break;
2505         case 0x9a:   /* DECID -- Identify Terminal */
2506                 ttywrite(vtiden, sizeof(vtiden) - 1);
2507                 break;
2508         case 0x9b:   /* TODO: CSI */
2509         case 0x9c:   /* TODO: ST */
2510                 break;
2511         case 0x90:   /* DCS -- Device Control String */
2512         case 0x9f:   /* APC -- Application Program Command */
2513         case 0x9e:   /* PM -- Privacy Message */
2514         case 0x9d:   /* OSC -- Operating System Command */
2515                 tstrsequence(ascii);
2516                 return;
2517         }
2518         /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2519         term.esc &= ~(ESC_STR_END|ESC_STR);
2520         return;
2521 }
2522
2523 /*
2524  * returns 1 when the sequence is finished and it hasn't to read
2525  * more characters for this sequence, otherwise 0
2526  */
2527 int
2528 eschandle(uchar ascii) {
2529         switch(ascii) {
2530         case '[':
2531                 term.esc |= ESC_CSI;
2532                 return 0;
2533         case '#':
2534                 term.esc |= ESC_TEST;
2535                 return 0;
2536         case 'P': /* DCS -- Device Control String */
2537         case '_': /* APC -- Application Program Command */
2538         case '^': /* PM -- Privacy Message */
2539         case ']': /* OSC -- Operating System Command */
2540         case 'k': /* old title set compatibility */
2541                 tstrsequence(ascii);
2542                 return 0;
2543         case 'n': /* LS2 -- Locking shift 2 */
2544         case 'o': /* LS3 -- Locking shift 3 */
2545                 term.charset = 2 + (ascii - 'n');
2546                 break;
2547         case '(': /* GZD4 -- set primary charset G0 */
2548         case ')': /* G1D4 -- set secondary charset G1 */
2549         case '*': /* G2D4 -- set tertiary charset G2 */
2550         case '+': /* G3D4 -- set quaternary charset G3 */
2551                 term.icharset = ascii - '(';
2552                 term.esc |= ESC_ALTCHARSET;
2553                 return 0;
2554         case 'D': /* IND -- Linefeed */
2555                 if(term.c.y == term.bot) {
2556                         tscrollup(term.top, 1);
2557                 } else {
2558                         tmoveto(term.c.x, term.c.y+1);
2559                 }
2560                 break;
2561         case 'E': /* NEL -- Next line */
2562                 tnewline(1); /* always go to first col */
2563                 break;
2564         case 'H': /* HTS -- Horizontal tab stop */
2565                 term.tabs[term.c.x] = 1;
2566                 break;
2567         case 'M': /* RI -- Reverse index */
2568                 if(term.c.y == term.top) {
2569                         tscrolldown(term.top, 1);
2570                 } else {
2571                         tmoveto(term.c.x, term.c.y-1);
2572                 }
2573                 break;
2574         case 'Z': /* DECID -- Identify Terminal */
2575                 ttywrite(vtiden, sizeof(vtiden) - 1);
2576                 break;
2577         case 'c': /* RIS -- Reset to inital state */
2578                 treset();
2579                 xresettitle();
2580                 xloadcols();
2581                 break;
2582         case '=': /* DECPAM -- Application keypad */
2583                 term.mode |= MODE_APPKEYPAD;
2584                 break;
2585         case '>': /* DECPNM -- Normal keypad */
2586                 term.mode &= ~MODE_APPKEYPAD;
2587                 break;
2588         case '7': /* DECSC -- Save Cursor */
2589                 tcursor(CURSOR_SAVE);
2590                 break;
2591         case '8': /* DECRC -- Restore Cursor */
2592                 tcursor(CURSOR_LOAD);
2593                 break;
2594         case '\\': /* ST -- String Terminator */
2595                 if(term.esc & ESC_STR_END)
2596                         strhandle();
2597                 break;
2598         default:
2599                 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2600                         (uchar) ascii, isprint(ascii)? ascii:'.');
2601                 break;
2602         }
2603         return 1;
2604 }
2605
2606 void
2607 tputc(char *c, int len) {
2608         uchar ascii;
2609         bool control;
2610         long unicodep;
2611         int width;
2612         Glyph *gp;
2613
2614         if(len == 1) {
2615                 width = 1;
2616                 unicodep = ascii = *c;
2617         } else {
2618                 utf8decode(c, &unicodep, UTF_SIZ);
2619                 if ((width = wcwidth(unicodep)) == -1) {
2620                         c = "\357\277\275";     /* UTF_INVALID */
2621                         width = 1;
2622                 }
2623                 control = ISCONTROLC1(unicodep);
2624                 ascii = unicodep;
2625         }
2626
2627         if(IS_SET(MODE_PRINT))
2628                 tprinter(c, len);
2629         control = ISCONTROL(unicodep);
2630
2631         /*
2632          * STR sequence must be checked before anything else
2633          * because it uses all following characters until it
2634          * receives a ESC, a SUB, a ST or any other C1 control
2635          * character.
2636          */
2637         if(term.esc & ESC_STR) {
2638                 if(width == 1 &&
2639                    (ascii == '\a' || ascii == 030 ||
2640                     ascii == 032  || ascii == 033 ||
2641                     ISCONTROLC1(unicodep))) {
2642                         term.esc &= ~(ESC_START|ESC_STR);
2643                         term.esc |= ESC_STR_END;
2644                 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2645                         memmove(&strescseq.buf[strescseq.len], c, len);
2646                         strescseq.len += len;
2647                         return;
2648                 } else {
2649                 /*
2650                  * Here is a bug in terminals. If the user never sends
2651                  * some code to stop the str or esc command, then st
2652                  * will stop responding. But this is better than
2653                  * silently failing with unknown characters. At least
2654                  * then users will report back.
2655                  *
2656                  * In the case users ever get fixed, here is the code:
2657                  */
2658                 /*
2659                  * term.esc = 0;
2660                  * strhandle();
2661                  */
2662                         return;
2663                 }
2664         }
2665
2666         /*
2667          * Actions of control codes must be performed as soon they arrive
2668          * because they can be embedded inside a control sequence, and
2669          * they must not cause conflicts with sequences.
2670          */
2671         if(control) {
2672                 tcontrolcode(ascii);
2673                 /*
2674                  * control codes are not shown ever
2675                  */
2676                 return;
2677         } else if(term.esc & ESC_START) {
2678                 if(term.esc & ESC_CSI) {
2679                         csiescseq.buf[csiescseq.len++] = ascii;
2680                         if(BETWEEN(ascii, 0x40, 0x7E)
2681                                         || csiescseq.len >= \
2682                                         sizeof(csiescseq.buf)-1) {
2683                                 term.esc = 0;
2684                                 csiparse();
2685                                 csihandle();
2686                         }
2687                         return;
2688                 } else if(term.esc & ESC_ALTCHARSET) {
2689                         tdeftran(ascii);
2690                 } else if(term.esc & ESC_TEST) {
2691                         tdectest(ascii);
2692                 } else {
2693                         if (!eschandle(ascii))
2694                                 return;
2695                         /* sequence already finished */
2696                 }
2697                 term.esc = 0;
2698                 /*
2699                  * All characters which form part of a sequence are not
2700                  * printed
2701                  */
2702                 return;
2703         }
2704         if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2705                 selclear(NULL);
2706
2707         gp = &term.line[term.c.y][term.c.x];
2708         if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2709                 gp->mode |= ATTR_WRAP;
2710                 tnewline(1);
2711                 gp = &term.line[term.c.y][term.c.x];
2712         }
2713
2714         if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2715                 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2716
2717         if(term.c.x+width > term.col) {
2718                 tnewline(1);
2719                 gp = &term.line[term.c.y][term.c.x];
2720         }
2721
2722         tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2723
2724         if(width == 2) {
2725                 gp->mode |= ATTR_WIDE;
2726                 if(term.c.x+1 < term.col) {
2727                         gp[1].c[0] = '\0';
2728                         gp[1].mode = ATTR_WDUMMY;
2729                 }
2730         }
2731         if(term.c.x+width < term.col) {
2732                 tmoveto(term.c.x+width, term.c.y);
2733         } else {
2734                 term.c.state |= CURSOR_WRAPNEXT;
2735         }
2736 }
2737
2738 void
2739 tresize(int col, int row) {
2740         int i;
2741         int minrow = MIN(row, term.row);
2742         int mincol = MIN(col, term.col);
2743         int slide = term.c.y - row + 1;
2744         bool *bp;
2745         TCursor c;
2746
2747         if(col < 1 || row < 1) {
2748                 fprintf(stderr,
2749                         "tresize: error resizing to %dx%d\n", col, row);
2750                 return;
2751         }
2752
2753         /* free unneeded rows */
2754         i = 0;
2755         if(slide > 0) {
2756                 /*
2757                  * slide screen to keep cursor where we expect it -
2758                  * tscrollup would work here, but we can optimize to
2759                  * memmove because we're freeing the earlier lines
2760                  */
2761                 for(/* i = 0 */; i < slide; i++) {
2762                         free(term.line[i]);
2763                         free(term.alt[i]);
2764                 }
2765                 memmove(term.line, term.line + slide, row * sizeof(Line));
2766                 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2767         }
2768         for(i += row; i < term.row; i++) {
2769                 free(term.line[i]);
2770                 free(term.alt[i]);
2771         }
2772
2773         /* resize to new height */
2774         term.line = xrealloc(term.line, row * sizeof(Line));
2775         term.alt  = xrealloc(term.alt,  row * sizeof(Line));
2776         term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2777         term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2778
2779         /* resize each row to new width, zero-pad if needed */
2780         for(i = 0; i < minrow; i++) {
2781                 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2782                 term.alt[i]  = xrealloc(term.alt[i],  col * sizeof(Glyph));
2783         }
2784
2785         /* allocate any new rows */
2786         for(/* i == minrow */; i < row; i++) {
2787                 term.line[i] = xmalloc(col * sizeof(Glyph));
2788                 term.alt[i] = xmalloc(col * sizeof(Glyph));
2789         }
2790         if(col > term.col) {
2791                 bp = term.tabs + term.col;
2792
2793                 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2794                 while(--bp > term.tabs && !*bp)
2795                         /* nothing */ ;
2796                 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2797                         *bp = 1;
2798         }
2799         /* update terminal size */
2800         term.col = col;
2801         term.row = row;
2802         /* reset scrolling region */
2803         tsetscroll(0, row-1);
2804         /* make use of the LIMIT in tmoveto */
2805         tmoveto(term.c.x, term.c.y);
2806         /* Clearing both screens (it makes dirty all lines) */
2807         c = term.c;
2808         for(i = 0; i < 2; i++) {
2809                 if(mincol < col && 0 < minrow) {
2810                         tclearregion(mincol, 0, col - 1, minrow - 1);
2811                 }
2812                 if(0 < col && minrow < row) {
2813                         tclearregion(0, minrow, col - 1, row - 1);
2814                 }
2815                 tswapscreen();
2816                 tcursor(CURSOR_LOAD);
2817         }
2818         term.c = c;
2819 }
2820
2821 void
2822 xresize(int col, int row) {
2823         xw.tw = MAX(1, col * xw.cw);
2824         xw.th = MAX(1, row * xw.ch);
2825
2826         XFreePixmap(xw.dpy, xw.buf);
2827         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2828                         DefaultDepth(xw.dpy, xw.scr));
2829         XftDrawChange(xw.draw, xw.buf);
2830         xclear(0, 0, xw.w, xw.h);
2831 }
2832
2833 static inline ushort
2834 sixd_to_16bit(int x) {
2835         return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2836 }
2837
2838 void
2839 xloadcols(void) {
2840         int i;
2841         XRenderColor color = { .alpha = 0xffff };
2842         static bool loaded;
2843         Color *cp;
2844
2845         if(loaded) {
2846                 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2847                         XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2848         }
2849
2850         /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2851         for(i = 0; i < LEN(colorname); i++) {
2852                 if(!colorname[i])
2853                         continue;
2854                 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2855                         die("Could not allocate color '%s'\n", colorname[i]);
2856                 }
2857         }
2858
2859         /* load colors [16-231] ; same colors as xterm */
2860         for(i = 16; i < 6*6*6+16; i++) {
2861                 color.red   = sixd_to_16bit( ((i-16)/36)%6 );
2862                 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2863                 color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
2864                 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2865                         die("Could not allocate color %d\n", i);
2866         }
2867
2868         /* load colors [232-255] ; grayscale */
2869         for(; i < 256; i++) {
2870                 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2871                 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2872                         die("Could not allocate color %d\n", i);
2873         }
2874         loaded = true;
2875 }
2876
2877 int
2878 xsetcolorname(int x, const char *name) {
2879         XRenderColor color = { .alpha = 0xffff };
2880         Color ncolor;
2881
2882         if(!BETWEEN(x, 0, LEN(colorname)))
2883                 return 1;
2884
2885         if(!name) {
2886                 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2887                         color.red   = sixd_to_16bit( ((x-16)/36)%6 );
2888                         color.green = sixd_to_16bit( ((x-16)/6) %6 );
2889                         color.blue  = sixd_to_16bit( ((x-16)/1) %6 );
2890                         if(!XftColorAllocValue(xw.dpy, xw.vis,
2891                                                 xw.cmap, &color, &ncolor)) {
2892                                 return 1;
2893                         }
2894
2895                         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2896                         dc.col[x] = ncolor;
2897                         return 0;
2898                 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2899                         color.red = color.green = color.blue = \
2900                                     0x0808 + 0x0a0a * (x - (16 + 216));
2901                         if(!XftColorAllocValue(xw.dpy, xw.vis,
2902                                                 xw.cmap, &color, &ncolor)) {
2903                                 return 1;
2904                         }
2905
2906                         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2907                         dc.col[x] = ncolor;
2908                         return 0;
2909                 } else { /* system colors */
2910                         name = colorname[x];
2911                 }
2912         }
2913         if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2914                 return 1;
2915
2916         XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2917         dc.col[x] = ncolor;
2918         return 0;
2919 }
2920
2921 void
2922 xtermclear(int col1, int row1, int col2, int row2) {
2923         XftDrawRect(xw.draw,
2924                         &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2925                         borderpx + col1 * xw.cw,
2926                         borderpx + row1 * xw.ch,
2927                         (col2-col1+1) * xw.cw,
2928                         (row2-row1+1) * xw.ch);
2929 }
2930
2931 /*
2932  * Absolute coordinates.
2933  */
2934 void
2935 xclear(int x1, int y1, int x2, int y2) {
2936         XftDrawRect(xw.draw,
2937                         &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2938                         x1, y1, x2-x1, y2-y1);
2939 }
2940
2941 void
2942 xhints(void) {
2943         XClassHint class = {opt_class ? opt_class : termname, termname};
2944         XWMHints wm = {.flags = InputHint, .input = 1};
2945         XSizeHints *sizeh = NULL;
2946
2947         sizeh = XAllocSizeHints();
2948
2949         sizeh->flags = PSize | PResizeInc | PBaseSize;
2950         sizeh->height = xw.h;
2951         sizeh->width = xw.w;
2952         sizeh->height_inc = xw.ch;
2953         sizeh->width_inc = xw.cw;
2954         sizeh->base_height = 2 * borderpx;
2955         sizeh->base_width = 2 * borderpx;
2956         if(xw.isfixed == True) {
2957                 sizeh->flags |= PMaxSize | PMinSize;
2958                 sizeh->min_width = sizeh->max_width = xw.w;
2959                 sizeh->min_height = sizeh->max_height = xw.h;
2960         }
2961         if(xw.gm & (XValue|YValue)) {
2962                 sizeh->flags |= USPosition | PWinGravity;
2963                 sizeh->x = xw.l;
2964                 sizeh->y = xw.t;
2965                 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2966         }
2967
2968         XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2969                         &class);
2970         XFree(sizeh);
2971 }
2972
2973 int
2974 xgeommasktogravity(int mask) {
2975         switch(mask & (XNegative|YNegative)) {
2976         case 0:
2977                 return NorthWestGravity;
2978         case XNegative:
2979                 return NorthEastGravity;
2980         case YNegative:
2981                 return SouthWestGravity;
2982         }
2983         return SouthEastGravity;
2984 }
2985
2986 int
2987 xloadfont(Font *f, FcPattern *pattern) {
2988         FcPattern *match;
2989         FcResult result;
2990
2991         match = FcFontMatch(NULL, pattern, &result);
2992         if(!match)
2993                 return 1;
2994
2995         if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2996                 FcPatternDestroy(match);
2997                 return 1;
2998         }
2999
3000         f->set = NULL;
3001         f->pattern = FcPatternDuplicate(pattern);
3002
3003         f->ascent = f->match->ascent;
3004         f->descent = f->match->descent;
3005         f->lbearing = 0;
3006         f->rbearing = f->match->max_advance_width;
3007
3008         f->height = f->ascent + f->descent;
3009         f->width = f->lbearing + f->rbearing;
3010
3011         return 0;
3012 }
3013
3014 void
3015 xloadfonts(char *fontstr, double fontsize) {
3016         FcPattern *pattern;
3017         FcResult r_sz, r_psz;
3018         double fontval;
3019         float ceilf(float);
3020
3021         if(fontstr[0] == '-') {
3022                 pattern = XftXlfdParse(fontstr, False, False);
3023         } else {
3024                 pattern = FcNameParse((FcChar8 *)fontstr);
3025         }
3026
3027         if(!pattern)
3028                 die("st: can't open font %s\n", fontstr);
3029
3030         if(fontsize > 1) {
3031                 FcPatternDel(pattern, FC_PIXEL_SIZE);
3032                 FcPatternDel(pattern, FC_SIZE);
3033                 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3034                 usedfontsize = fontsize;
3035         } else {
3036                 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3037                 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3038                 if(r_psz == FcResultMatch) {
3039                         usedfontsize = fontval;
3040                 } else if(r_sz == FcResultMatch) {
3041                         usedfontsize = -1;
3042                 } else {
3043                         /*
3044                          * Default font size is 12, if none given. This is to
3045                          * have a known usedfontsize value.
3046                          */
3047                         FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3048                         usedfontsize = 12;
3049                 }
3050                 defaultfontsize = usedfontsize;
3051         }
3052
3053         FcConfigSubstitute(0, pattern, FcMatchPattern);
3054         FcDefaultSubstitute(pattern);
3055
3056         if(xloadfont(&dc.font, pattern))
3057                 die("st: can't open font %s\n", fontstr);
3058
3059         if(usedfontsize < 0) {
3060                 FcPatternGetDouble(dc.font.match->pattern,
3061                                    FC_PIXEL_SIZE, 0, &fontval);
3062                 usedfontsize = fontval;
3063                 if(fontsize == 0)
3064                         defaultfontsize = fontval;
3065         }
3066
3067         /* Setting character width and height. */
3068         xw.cw = ceilf(dc.font.width * cwscale);
3069         xw.ch = ceilf(dc.font.height * chscale);
3070
3071         FcPatternDel(pattern, FC_SLANT);
3072         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3073         if(xloadfont(&dc.ifont, pattern))
3074                 die("st: can't open font %s\n", fontstr);
3075
3076         FcPatternDel(pattern, FC_WEIGHT);
3077         FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3078         if(xloadfont(&dc.ibfont, pattern))
3079                 die("st: can't open font %s\n", fontstr);
3080
3081         FcPatternDel(pattern, FC_SLANT);
3082         FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3083         if(xloadfont(&dc.bfont, pattern))
3084                 die("st: can't open font %s\n", fontstr);
3085
3086         FcPatternDestroy(pattern);
3087 }
3088
3089 int
3090 xloadfontset(Font *f) {
3091         FcResult result;
3092
3093         if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3094                 return 1;
3095         return 0;
3096 }
3097
3098 void
3099 xunloadfont(Font *f) {
3100         XftFontClose(xw.dpy, f->match);
3101         FcPatternDestroy(f->pattern);
3102         if(f->set)
3103                 FcFontSetDestroy(f->set);
3104 }
3105
3106 void
3107 xunloadfonts(void) {
3108         /* Free the loaded fonts in the font cache.  */
3109         while(frclen > 0)
3110                 XftFontClose(xw.dpy, frc[--frclen].font);
3111
3112         xunloadfont(&dc.font);
3113         xunloadfont(&dc.bfont);
3114         xunloadfont(&dc.ifont);
3115         xunloadfont(&dc.ibfont);
3116 }
3117
3118 void
3119 xzoom(const Arg *arg) {
3120         Arg larg;
3121
3122         larg.i = usedfontsize + arg->i;
3123         xzoomabs(&larg);
3124 }
3125
3126 void
3127 xzoomabs(const Arg *arg) {
3128         xunloadfonts();
3129         xloadfonts(usedfont, arg->i);
3130         cresize(0, 0);
3131         redraw();
3132         xhints();
3133 }
3134
3135 void
3136 xzoomreset(const Arg *arg) {
3137         Arg larg;
3138
3139         if(defaultfontsize > 0) {
3140                 larg.i = defaultfontsize;
3141                 xzoomabs(&larg);
3142         }
3143 }
3144
3145 void
3146 xinit(void) {
3147         XGCValues gcvalues;
3148         Cursor cursor;
3149         Window parent;
3150         pid_t thispid = getpid();
3151
3152         if(!(xw.dpy = XOpenDisplay(NULL)))
3153                 die("Can't open display\n");
3154         xw.scr = XDefaultScreen(xw.dpy);
3155         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3156
3157         /* font */
3158         if(!FcInit())
3159                 die("Could not init fontconfig.\n");
3160
3161         usedfont = (opt_font == NULL)? font : opt_font;
3162         xloadfonts(usedfont, 0);
3163
3164         /* colors */
3165         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3166         xloadcols();
3167
3168         /* adjust fixed window geometry */
3169         xw.w = 2 * borderpx + term.col * xw.cw;
3170         xw.h = 2 * borderpx + term.row * xw.ch;
3171         if(xw.gm & XNegative)
3172                 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3173         if(xw.gm & YNegative)
3174                 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3175
3176         /* Events */
3177         xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3178         xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3179         xw.attrs.bit_gravity = NorthWestGravity;
3180         xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3181                 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3182                 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3183         xw.attrs.colormap = xw.cmap;
3184
3185         if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3186                 parent = XRootWindow(xw.dpy, xw.scr);
3187         xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3188                         xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3189                         xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3190                         | CWEventMask | CWColormap, &xw.attrs);
3191
3192         memset(&gcvalues, 0, sizeof(gcvalues));
3193         gcvalues.graphics_exposures = False;
3194         dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3195                         &gcvalues);
3196         xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3197                         DefaultDepth(xw.dpy, xw.scr));
3198         XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3199         XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3200
3201         /* Xft rendering context */
3202         xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3203
3204         /* input methods */
3205         if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3206                 XSetLocaleModifiers("@im=local");
3207                 if((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3208                         XSetLocaleModifiers("@im=");
3209                         if((xw.xim = XOpenIM(xw.dpy,
3210                                         NULL, NULL, NULL)) == NULL) {
3211                                 die("XOpenIM failed. Could not open input"
3212                                         " device.\n");
3213                         }
3214                 }
3215         }
3216         xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3217                                            | XIMStatusNothing, XNClientWindow, xw.win,
3218                                            XNFocusWindow, xw.win, NULL);
3219         if(xw.xic == NULL)
3220                 die("XCreateIC failed. Could not obtain input method.\n");
3221
3222         /* white cursor, black outline */
3223         cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3224         XDefineCursor(xw.dpy, xw.win, cursor);
3225         XRecolorCursor(xw.dpy, cursor,
3226                 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3227                 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3228
3229         xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3230         xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3231         xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3232         XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3233
3234         xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3235         XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3236                         PropModeReplace, (uchar *)&thispid, 1);
3237
3238         xresettitle();
3239         XMapWindow(xw.dpy, xw.win);
3240         xhints();
3241         XSync(xw.dpy, False);
3242 }
3243
3244 void
3245 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3246         int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3247             width = charlen * xw.cw, xp, i;
3248         int frcflags, charexists;
3249         int u8fl, u8fblen, u8cblen, doesexist;
3250         char *u8c, *u8fs;
3251         long unicodep;
3252         Font *font = &dc.font;
3253         FcResult fcres;
3254         FcPattern *fcpattern, *fontpattern;
3255         FcFontSet *fcsets[] = { NULL };
3256         FcCharSet *fccharset;
3257         Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3258         XRenderColor colfg, colbg;
3259         XRectangle r;
3260         int oneatatime;
3261
3262         frcflags = FRC_NORMAL;
3263
3264         if(base.mode & ATTR_ITALIC) {
3265                 if(base.fg == defaultfg)
3266                         base.fg = defaultitalic;
3267                 font = &dc.ifont;
3268                 frcflags = FRC_ITALIC;
3269         } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3270                 if(base.fg == defaultfg)
3271                         base.fg = defaultitalic;
3272                 font = &dc.ibfont;
3273                 frcflags = FRC_ITALICBOLD;
3274         } else if(base.mode & ATTR_UNDERLINE) {
3275                 if(base.fg == defaultfg)
3276                         base.fg = defaultunderline;
3277         }
3278
3279         if(IS_TRUECOL(base.fg)) {
3280                 colfg.alpha = 0xffff;
3281                 colfg.red = TRUERED(base.fg);
3282                 colfg.green = TRUEGREEN(base.fg);
3283                 colfg.blue = TRUEBLUE(base.fg);
3284                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3285                 fg = &truefg;
3286         } else {
3287                 fg = &dc.col[base.fg];
3288         }
3289
3290         if(IS_TRUECOL(base.bg)) {
3291                 colbg.alpha = 0xffff;
3292                 colbg.green = TRUEGREEN(base.bg);
3293                 colbg.red = TRUERED(base.bg);
3294                 colbg.blue = TRUEBLUE(base.bg);
3295                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3296                 bg = &truebg;
3297         } else {
3298                 bg = &dc.col[base.bg];
3299         }
3300
3301         if(base.mode & ATTR_BOLD) {
3302                 /*
3303                  * change basic system colors [0-7]
3304                  * to bright system colors [8-15]
3305                  */
3306                 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3307                         fg = &dc.col[base.fg + 8];
3308
3309                 if(base.mode & ATTR_ITALIC) {
3310                         font = &dc.ibfont;
3311                         frcflags = FRC_ITALICBOLD;
3312                 } else {
3313                         font = &dc.bfont;
3314                         frcflags = FRC_BOLD;
3315                 }
3316         }
3317
3318         if(IS_SET(MODE_REVERSE)) {
3319                 if(fg == &dc.col[defaultfg]) {
3320                         fg = &dc.col[defaultbg];
3321                 } else {
3322                         colfg.red = ~fg->color.red;
3323                         colfg.green = ~fg->color.green;
3324                         colfg.blue = ~fg->color.blue;
3325                         colfg.alpha = fg->color.alpha;
3326                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3327                                         &revfg);
3328                         fg = &revfg;
3329                 }
3330
3331                 if(bg == &dc.col[defaultbg]) {
3332                         bg = &dc.col[defaultfg];
3333                 } else {
3334                         colbg.red = ~bg->color.red;
3335                         colbg.green = ~bg->color.green;
3336                         colbg.blue = ~bg->color.blue;
3337                         colbg.alpha = bg->color.alpha;
3338                         XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3339                                         &revbg);
3340                         bg = &revbg;
3341                 }
3342         }
3343
3344         if(base.mode & ATTR_REVERSE) {
3345                 temp = fg;
3346                 fg = bg;
3347                 bg = temp;
3348         }
3349
3350         if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3351                 colfg.red = fg->color.red / 2;
3352                 colfg.green = fg->color.green / 2;
3353                 colfg.blue = fg->color.blue / 2;
3354                 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3355                 fg = &revfg;
3356         }
3357
3358         if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3359                 fg = bg;
3360
3361         if(base.mode & ATTR_INVISIBLE)
3362                 fg = bg;
3363
3364         /* Intelligent cleaning up of the borders. */
3365         if(x == 0) {
3366                 xclear(0, (y == 0)? 0 : winy, borderpx,
3367                         winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3368         }
3369         if(x + charlen >= term.col) {
3370                 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3371                         ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3372         }
3373         if(y == 0)
3374                 xclear(winx, 0, winx + width, borderpx);
3375         if(y == term.row-1)
3376                 xclear(winx, winy + xw.ch, winx + width, xw.h);
3377
3378         /* Clean up the region we want to draw to. */
3379         XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3380
3381         /* Set the clip region because Xft is sometimes dirty. */
3382         r.x = 0;
3383         r.y = 0;
3384         r.height = xw.ch;
3385         r.width = width;
3386         XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3387
3388         for(xp = winx; bytelen > 0;) {
3389                 /*
3390                  * Search for the range in the to be printed string of glyphs
3391                  * that are in the main font. Then print that range. If
3392                  * some glyph is found that is not in the font, do the
3393                  * fallback dance.
3394                  */
3395                 u8fs = s;
3396                 u8fblen = 0;
3397                 u8fl = 0;
3398                 oneatatime = font->width != xw.cw;
3399                 for(;;) {
3400                         u8c = s;
3401                         u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3402                         s += u8cblen;
3403                         bytelen -= u8cblen;
3404
3405                         doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3406                         if(doesexist) {
3407                                         u8fl++;
3408                                         u8fblen += u8cblen;
3409                                         if(!oneatatime && bytelen > 0)
3410                                                         continue;
3411                         }
3412
3413                         if(u8fl > 0) {
3414                                 XftDrawStringUtf8(xw.draw, fg,
3415                                                 font->match, xp,
3416                                                 winy + font->ascent,
3417                                                 (FcChar8 *)u8fs,
3418                                                 u8fblen);
3419                                 xp += xw.cw * u8fl;
3420                         }
3421                         break;
3422                 }
3423                 if(doesexist) {
3424                         if(oneatatime)
3425                                 continue;
3426                         break;
3427                 }
3428
3429                 /* Search the font cache. */
3430                 for(i = 0; i < frclen; i++) {
3431                         charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3432                         /* Everything correct. */
3433                         if(charexists && frc[i].flags == frcflags)
3434                                 break;
3435                         /* We got a default font for a not found glyph. */
3436                         if(!charexists && frc[i].flags == frcflags \
3437                                         && frc[i].unicodep == unicodep) {
3438                                 break;
3439                         }
3440                 }
3441
3442                 /* Nothing was found. */
3443                 if(i >= frclen) {
3444                         if(!font->set)
3445                                 xloadfontset(font);
3446                         fcsets[0] = font->set;
3447
3448                         /*
3449                          * Nothing was found in the cache. Now use
3450                          * some dozen of Fontconfig calls to get the
3451                          * font for one single character.
3452                          *
3453                          * Xft and fontconfig are design failures.
3454                          */
3455                         fcpattern = FcPatternDuplicate(font->pattern);
3456                         fccharset = FcCharSetCreate();
3457
3458                         FcCharSetAddChar(fccharset, unicodep);
3459                         FcPatternAddCharSet(fcpattern, FC_CHARSET,
3460                                         fccharset);
3461                         FcPatternAddBool(fcpattern, FC_SCALABLE,
3462                                         FcTrue);
3463
3464                         FcConfigSubstitute(0, fcpattern,
3465                                         FcMatchPattern);
3466                         FcDefaultSubstitute(fcpattern);
3467
3468                         fontpattern = FcFontSetMatch(0, fcsets, 1,
3469                                         fcpattern, &fcres);
3470
3471                         /*
3472                          * Overwrite or create the new cache entry.
3473                          */
3474                         if(frclen >= LEN(frc)) {
3475                                 frclen = LEN(frc) - 1;
3476                                 XftFontClose(xw.dpy, frc[frclen].font);
3477                                 frc[frclen].unicodep = 0;
3478                         }
3479
3480                         frc[frclen].font = XftFontOpenPattern(xw.dpy,
3481                                         fontpattern);
3482                         frc[frclen].flags = frcflags;
3483                         frc[frclen].unicodep = unicodep;
3484
3485                         i = frclen;
3486                         frclen++;
3487
3488                         FcPatternDestroy(fcpattern);
3489                         FcCharSetDestroy(fccharset);
3490                 }
3491
3492                 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3493                                 xp, winy + frc[i].font->ascent,
3494                                 (FcChar8 *)u8c, u8cblen);
3495
3496                 xp += xw.cw * wcwidth(unicodep);
3497         }
3498
3499         /*
3500          * This is how the loop above actually should be. Why does the
3501          * application have to care about font details?
3502          *
3503          * I have to repeat: Xft and Fontconfig are design failures.
3504          */
3505         /*
3506         XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3507                         winy + font->ascent, (FcChar8 *)s, bytelen);
3508         */
3509
3510         if(base.mode & ATTR_UNDERLINE) {
3511                 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3512                                 width, 1);
3513         }
3514
3515         if(base.mode & ATTR_STRUCK) {
3516                 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3517                                 width, 1);
3518         }
3519
3520         /* Reset clip to none. */
3521         XftDrawSetClip(xw.draw, 0);
3522 }
3523
3524 void
3525 xdrawcursor(void) {
3526         static int oldx = 0, oldy = 0;
3527         int sl, width, curx;
3528         Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3529
3530         LIMIT(oldx, 0, term.col-1);
3531         LIMIT(oldy, 0, term.row-1);
3532
3533         curx = term.c.x;
3534
3535         /* adjust position if in dummy */
3536         if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3537                 oldx--;
3538         if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3539                 curx--;
3540
3541         memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3542
3543         /* remove the old cursor */
3544         sl = utf8len(term.line[oldy][oldx].c);
3545         width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3546         xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3547                         oldy, width, sl);
3548
3549         if(IS_SET(MODE_HIDE))
3550                 return;
3551
3552         /* draw the new one */
3553         if(xw.state & WIN_FOCUSED) {
3554                 if(IS_SET(MODE_REVERSE)) {
3555                         g.mode |= ATTR_REVERSE;
3556                         g.fg = defaultcs;
3557                         g.bg = defaultfg;
3558                 }
3559
3560                 sl = utf8len(g.c);
3561                 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3562                         ? 2 : 1;
3563                 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3564         } else {
3565                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3566                                 borderpx + curx * xw.cw,
3567                                 borderpx + term.c.y * xw.ch,
3568                                 xw.cw - 1, 1);
3569                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3570                                 borderpx + curx * xw.cw,
3571                                 borderpx + term.c.y * xw.ch,
3572                                 1, xw.ch - 1);
3573                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3574                                 borderpx + (curx + 1) * xw.cw - 1,
3575                                 borderpx + term.c.y * xw.ch,
3576                                 1, xw.ch - 1);
3577                 XftDrawRect(xw.draw, &dc.col[defaultcs],
3578                                 borderpx + curx * xw.cw,
3579                                 borderpx + (term.c.y + 1) * xw.ch - 1,
3580                                 xw.cw, 1);
3581         }
3582         oldx = curx, oldy = term.c.y;
3583 }
3584
3585
3586 void
3587 xsettitle(char *p) {
3588         XTextProperty prop;
3589
3590         Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3591                         &prop);
3592         XSetWMName(xw.dpy, xw.win, &prop);
3593         XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3594         XFree(prop.value);
3595 }
3596
3597 void
3598 xresettitle(void) {
3599         xsettitle(opt_title ? opt_title : "st");
3600 }
3601
3602 void
3603 redraw(void) {
3604         tfulldirt();
3605         draw();
3606 }
3607
3608 void
3609 draw(void) {
3610         drawregion(0, 0, term.col, term.row);
3611         XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3612                         xw.h, 0, 0);
3613         XSetForeground(xw.dpy, dc.gc,
3614                         dc.col[IS_SET(MODE_REVERSE)?
3615                                 defaultfg : defaultbg].pixel);
3616 }
3617
3618 void
3619 drawregion(int x1, int y1, int x2, int y2) {
3620         int ic, ib, x, y, ox, sl;
3621         Glyph base, new;
3622         char buf[DRAW_BUF_SIZ];
3623         bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3624         long unicodep;
3625
3626         if(!(xw.state & WIN_VISIBLE))
3627                 return;
3628
3629         for(y = y1; y < y2; y++) {
3630                 if(!term.dirty[y])
3631                         continue;
3632
3633                 xtermclear(0, y, term.col, y);
3634                 term.dirty[y] = 0;
3635                 base = term.line[y][0];
3636                 ic = ib = ox = 0;
3637                 for(x = x1; x < x2; x++) {
3638                         new = term.line[y][x];
3639                         if(new.mode == ATTR_WDUMMY)
3640                                 continue;
3641                         if(ena_sel && selected(x, y))
3642                                 new.mode ^= ATTR_REVERSE;
3643                         if(ib > 0 && (ATTRCMP(base, new)
3644                                         || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3645                                 xdraws(buf, base, ox, y, ic, ib);
3646                                 ic = ib = 0;
3647                         }
3648                         if(ib == 0) {
3649                                 ox = x;
3650                                 base = new;
3651                         }
3652
3653                         sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3654                         memcpy(buf+ib, new.c, sl);
3655                         ib += sl;
3656                         ic += (new.mode & ATTR_WIDE)? 2 : 1;
3657                 }
3658                 if(ib > 0)
3659                         xdraws(buf, base, ox, y, ic, ib);
3660         }
3661         xdrawcursor();
3662 }
3663
3664 void
3665 expose(XEvent *ev) {
3666         XExposeEvent *e = &ev->xexpose;
3667
3668         if(xw.state & WIN_REDRAW) {
3669                 if(!e->count)
3670                         xw.state &= ~WIN_REDRAW;
3671         }
3672         redraw();
3673 }
3674
3675 void
3676 visibility(XEvent *ev) {
3677         XVisibilityEvent *e = &ev->xvisibility;
3678
3679         if(e->state == VisibilityFullyObscured) {
3680                 xw.state &= ~WIN_VISIBLE;
3681         } else if(!(xw.state & WIN_VISIBLE)) {
3682                 /* need a full redraw for next Expose, not just a buf copy */
3683                 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3684         }
3685 }
3686
3687 void
3688 unmap(XEvent *ev) {
3689         xw.state &= ~WIN_VISIBLE;
3690 }
3691
3692 void
3693 xsetpointermotion(int set) {
3694         MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3695         XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3696 }
3697
3698 void
3699 xseturgency(int add) {
3700         XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3701
3702         MODBIT(h->flags, add, XUrgencyHint);
3703         XSetWMHints(xw.dpy, xw.win, h);
3704         XFree(h);
3705 }
3706
3707 void
3708 focus(XEvent *ev) {
3709         XFocusChangeEvent *e = &ev->xfocus;
3710
3711         if(e->mode == NotifyGrab)
3712                 return;
3713
3714         if(ev->type == FocusIn) {
3715                 XSetICFocus(xw.xic);
3716                 xw.state |= WIN_FOCUSED;
3717                 xseturgency(0);
3718                 if(IS_SET(MODE_FOCUS))
3719                         ttywrite("\033[I", 3);
3720         } else {
3721                 XUnsetICFocus(xw.xic);
3722                 xw.state &= ~WIN_FOCUSED;
3723                 if(IS_SET(MODE_FOCUS))
3724                         ttywrite("\033[O", 3);
3725         }
3726 }
3727
3728 static inline bool
3729 match(uint mask, uint state) {
3730         return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3731 }
3732
3733 void
3734 numlock(const Arg *dummy) {
3735         term.numlock ^= 1;
3736 }
3737
3738 char*
3739 kmap(KeySym k, uint state) {
3740         Key *kp;
3741         int i;
3742
3743         /* Check for mapped keys out of X11 function keys. */
3744         for(i = 0; i < LEN(mappedkeys); i++) {
3745                 if(mappedkeys[i] == k)
3746                         break;
3747         }
3748         if(i == LEN(mappedkeys)) {
3749                 if((k & 0xFFFF) < 0xFD00)
3750                         return NULL;
3751         }
3752
3753         for(kp = key; kp < key + LEN(key); kp++) {
3754                 if(kp->k != k)
3755                         continue;
3756
3757                 if(!match(kp->mask, state))
3758                         continue;
3759
3760                 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3761                         continue;
3762                 if(term.numlock && kp->appkey == 2)
3763                         continue;
3764
3765                 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3766                         continue;
3767
3768                 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3769                         continue;
3770
3771                 return kp->s;
3772         }
3773
3774         return NULL;
3775 }
3776
3777 void
3778 kpress(XEvent *ev) {
3779         XKeyEvent *e = &ev->xkey;
3780         KeySym ksym;
3781         char buf[32], *customkey;
3782         int len;
3783         long c;
3784         Status status;
3785         Shortcut *bp;
3786
3787         if(IS_SET(MODE_KBDLOCK))
3788                 return;
3789
3790         len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3791         /* 1. shortcuts */
3792         for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3793                 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3794                         bp->func(&(bp->arg));
3795                         return;
3796                 }
3797         }
3798
3799         /* 2. custom keys from config.h */
3800         if((customkey = kmap(ksym, e->state))) {
3801                 ttysend(customkey, strlen(customkey));
3802                 return;
3803         }
3804
3805         /* 3. composed string from input method */
3806         if(len == 0)
3807                 return;
3808         if(len == 1 && e->state & Mod1Mask) {
3809                 if(IS_SET(MODE_8BIT)) {
3810                         if(*buf < 0177) {
3811                                 c = *buf | 0x80;
3812                                 len = utf8encode(c, buf, UTF_SIZ);
3813                         }
3814                 } else {
3815                         buf[1] = buf[0];
3816                         buf[0] = '\033';
3817                         len = 2;
3818                 }
3819         }
3820         ttysend(buf, len);
3821 }
3822
3823
3824 void
3825 cmessage(XEvent *e) {
3826         /*
3827          * See xembed specs
3828          *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3829          */
3830         if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3831                 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3832                         xw.state |= WIN_FOCUSED;
3833                         xseturgency(0);
3834                 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3835                         xw.state &= ~WIN_FOCUSED;
3836                 }
3837         } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3838                 /* Send SIGHUP to shell */
3839                 kill(pid, SIGHUP);
3840                 exit(EXIT_SUCCESS);
3841         }
3842 }
3843
3844 void
3845 cresize(int width, int height) {
3846         int col, row;
3847
3848         if(width != 0)
3849                 xw.w = width;
3850         if(height != 0)
3851                 xw.h = height;
3852
3853         col = (xw.w - 2 * borderpx) / xw.cw;
3854         row = (xw.h - 2 * borderpx) / xw.ch;
3855
3856         tresize(col, row);
3857         xresize(col, row);
3858         ttyresize();
3859 }
3860
3861 void
3862 resize(XEvent *e) {
3863         if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3864                 return;
3865
3866         cresize(e->xconfigure.width, e->xconfigure.height);
3867 }
3868
3869 void
3870 run(void) {
3871         XEvent ev;
3872         int w = xw.w, h = xw.h;
3873         fd_set rfd;
3874         int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3875         struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3876         long deltatime;
3877
3878         /* Waiting for window mapping */
3879         while(1) {
3880                 XNextEvent(xw.dpy, &ev);
3881                 if(XFilterEvent(&ev, None))
3882                         continue;
3883                 if(ev.type == ConfigureNotify) {
3884                         w = ev.xconfigure.width;
3885                         h = ev.xconfigure.height;
3886                 } else if(ev.type == MapNotify) {
3887                         break;
3888                 }
3889         }
3890
3891         ttynew();
3892         cresize(w, h);
3893
3894         clock_gettime(CLOCK_MONOTONIC, &last);
3895         lastblink = last;
3896
3897         for(xev = actionfps;;) {
3898                 FD_ZERO(&rfd);
3899                 FD_SET(cmdfd, &rfd);
3900                 FD_SET(xfd, &rfd);
3901
3902                 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3903                         if(errno == EINTR)
3904                                 continue;
3905                         die("select failed: %s\n", strerror(errno));
3906                 }
3907                 if(FD_ISSET(cmdfd, &rfd)) {
3908                         ttyread();
3909                         if(blinktimeout) {
3910                                 blinkset = tattrset(ATTR_BLINK);
3911                                 if(!blinkset)
3912                                         MODBIT(term.mode, 0, MODE_BLINK);
3913                         }
3914                 }
3915
3916                 if(FD_ISSET(xfd, &rfd))
3917                         xev = actionfps;
3918
3919                 clock_gettime(CLOCK_MONOTONIC, &now);
3920                 drawtimeout.tv_sec = 0;
3921                 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3922                 tv = &drawtimeout;
3923
3924                 dodraw = 0;
3925                 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3926                         tsetdirtattr(ATTR_BLINK);
3927                         term.mode ^= MODE_BLINK;
3928                         lastblink = now;
3929                         dodraw = 1;
3930                 }
3931                 deltatime = TIMEDIFF(now, last);
3932                 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3933                                 || deltatime < 0) {
3934                         dodraw = 1;
3935                         last = now;
3936                 }
3937
3938                 if(dodraw) {
3939                         while(XPending(xw.dpy)) {
3940                                 XNextEvent(xw.dpy, &ev);
3941                                 if(XFilterEvent(&ev, None))
3942                                         continue;
3943                                 if(handler[ev.type])
3944                                         (handler[ev.type])(&ev);
3945                         }
3946
3947                         draw();
3948                         XFlush(xw.dpy);
3949
3950                         if(xev && !FD_ISSET(xfd, &rfd))
3951                                 xev--;
3952                         if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3953                                 if(blinkset) {
3954                                         if(TIMEDIFF(now, lastblink) \
3955                                                         > blinktimeout) {
3956                                                 drawtimeout.tv_nsec = 1000;
3957                                         } else {
3958                                                 drawtimeout.tv_nsec = (1E6 * \
3959                                                         (blinktimeout - \
3960                                                         TIMEDIFF(now,
3961                                                                 lastblink)));
3962                                         }
3963                                         drawtimeout.tv_sec = \
3964                                             drawtimeout.tv_nsec / 1E9;
3965                                         drawtimeout.tv_nsec %= (long)1E9;
3966                                 } else {
3967                                         tv = NULL;
3968                                 }
3969                         }
3970                 }
3971         }
3972 }
3973
3974 void
3975 usage(void) {
3976         die("%s " VERSION " (c) 2010-2015 st engineers\n" \
3977         "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3978         "          [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3979 }
3980
3981 int
3982 main(int argc, char *argv[]) {
3983         char *titles;
3984         uint cols = 80, rows = 24;
3985
3986         xw.l = xw.t = 0;
3987         xw.isfixed = False;
3988
3989         ARGBEGIN {
3990         case 'a':
3991                 allowaltscreen = false;
3992                 break;
3993         case 'c':
3994                 opt_class = EARGF(usage());
3995                 break;
3996         case 'e':
3997                 /* eat all remaining arguments */
3998                 if(argc > 1) {
3999                         opt_cmd = &argv[1];
4000                         if(argv[1] != NULL && opt_title == NULL) {
4001                                 titles = xstrdup(argv[1]);
4002                                 opt_title = basename(titles);
4003                         }
4004                 }
4005                 goto run;
4006         case 'f':
4007                 opt_font = EARGF(usage());
4008                 break;
4009         case 'g':
4010                 xw.gm = XParseGeometry(EARGF(usage()),
4011                                 &xw.l, &xw.t, &cols, &rows);
4012                 break;
4013         case 'i':
4014                 xw.isfixed = True;
4015                 break;
4016         case 'o':
4017                 opt_io = EARGF(usage());
4018                 break;
4019         case 't':
4020                 opt_title = EARGF(usage());
4021                 break;
4022         case 'w':
4023                 opt_embed = EARGF(usage());
4024                 break;
4025         case 'v':
4026         default:
4027                 usage();
4028         } ARGEND;
4029
4030 run:
4031         setlocale(LC_CTYPE, "");
4032         XSetLocaleModifiers("");
4033         tnew(cols? cols : 1, rows? rows : 1);
4034         xinit();
4035         selinit();
4036         run();
4037
4038         return 0;
4039 }
4040