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fix: consistent usage of bitmask operations on unicode functions
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <libgen.h>
23 #include <X11/Xatom.h>
24 #include <X11/Xlib.h>
25 #include <X11/Xutil.h>
26 #include <X11/cursorfont.h>
27 #include <X11/keysym.h>
28 #include <X11/Xft/Xft.h>
29 #include <fontconfig/fontconfig.h>
30
31 #include "arg.h"
32
33 char *argv0;
34
35 #define Glyph Glyph_
36 #define Font Font_
37 #define Draw XftDraw *
38 #define Colour XftColor
39 #define Colourmap Colormap
40 #define Rectangle XRectangle
41
42 #if defined(__linux)
43 #include <pty.h>
44 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
45 #include <util.h>
46 #elif defined(__FreeBSD__) || defined(__DragonFly__)
47 #include <libutil.h>
48 #endif
49
50
51 /* XEMBED messages */
52 #define XEMBED_FOCUS_IN 4
53 #define XEMBED_FOCUS_OUT 5
54
55 /* Arbitrary sizes */
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 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
67
68 /* macros */
69 #define SERRNO strerror(errno)
70 #define MIN(a, b) ((a) < (b) ? (a) : (b))
71 #define MAX(a, b) ((a) < (b) ? (b) : (a))
72 #define LEN(a) (sizeof(a) / sizeof(a[0]))
73 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
74 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
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_usec-t2.tv_usec)/1000)
79
80 #define VT102ID "\033[?6c"
81
82 enum glyph_attribute {
83 ATTR_NULL = 0,
84 ATTR_REVERSE = 1,
85 ATTR_UNDERLINE = 2,
86 ATTR_BOLD = 4,
87 ATTR_GFX = 8,
88 ATTR_ITALIC = 16,
89 ATTR_BLINK = 32,
90 ATTR_WRAP = 64,
91 };
92
93 enum cursor_movement {
94 CURSOR_SAVE,
95 CURSOR_LOAD
96 };
97
98 enum cursor_state {
99 CURSOR_DEFAULT = 0,
100 CURSOR_WRAPNEXT = 1,
101 CURSOR_ORIGIN = 2
102 };
103
104 enum term_mode {
105 MODE_WRAP = 1,
106 MODE_INSERT = 2,
107 MODE_APPKEYPAD = 4,
108 MODE_ALTSCREEN = 8,
109 MODE_CRLF = 16,
110 MODE_MOUSEBTN = 32,
111 MODE_MOUSEMOTION = 64,
112 MODE_REVERSE = 128,
113 MODE_KBDLOCK = 256,
114 MODE_HIDE = 512,
115 MODE_ECHO = 1024,
116 MODE_APPCURSOR = 2048,
117 MODE_MOUSESGR = 4096,
118 MODE_8BIT = 8192,
119 MODE_BLINK = 16384,
120 MODE_FBLINK = 32768,
121 MODE_FOCUS = 65536,
122 MODE_MOUSEX10 = 131072,
123 MODE_MOUSEMANY = 262144,
124 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
125 |MODE_MOUSEMANY,
126 };
127
128 enum escape_state {
129 ESC_START = 1,
130 ESC_CSI = 2,
131 ESC_STR = 4, /* DSC, OSC, PM, APC */
132 ESC_ALTCHARSET = 8,
133 ESC_STR_END = 16, /* a final string was encountered */
134 ESC_TEST = 32, /* Enter in test mode */
135 };
136
137 enum window_state {
138 WIN_VISIBLE = 1,
139 WIN_REDRAW = 2,
140 WIN_FOCUSED = 4
141 };
142
143 enum selection_type {
144 SEL_REGULAR = 1,
145 SEL_RECTANGULAR = 2
146 };
147
148 enum selection_snap {
149 SNAP_WORD = 1,
150 SNAP_LINE = 2
151 };
152
153 typedef unsigned char uchar;
154 typedef unsigned int uint;
155 typedef unsigned long ulong;
156 typedef unsigned short ushort;
157
158 typedef struct {
159 char c[UTF_SIZ]; /* character code */
160 uchar mode; /* attribute flags */
161 ushort fg; /* foreground */
162 ushort bg; /* background */
163 } Glyph;
164
165 typedef Glyph *Line;
166
167 typedef struct {
168 Glyph attr; /* current char attributes */
169 int x;
170 int y;
171 char state;
172 } TCursor;
173
174 /* CSI Escape sequence structs */
175 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
176 typedef struct {
177 char buf[ESC_BUF_SIZ]; /* raw string */
178 int len; /* raw string length */
179 char priv;
180 int arg[ESC_ARG_SIZ];
181 int narg; /* nb of args */
182 char mode;
183 } CSIEscape;
184
185 /* STR Escape sequence structs */
186 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
187 typedef struct {
188 char type; /* ESC type ... */
189 char buf[STR_BUF_SIZ]; /* raw string */
190 int len; /* raw string length */
191 char *args[STR_ARG_SIZ];
192 int narg; /* nb of args */
193 } STREscape;
194
195 /* Internal representation of the screen */
196 typedef struct {
197 int row; /* nb row */
198 int col; /* nb col */
199 Line *line; /* screen */
200 Line *alt; /* alternate screen */
201 bool *dirty; /* dirtyness of lines */
202 TCursor c; /* cursor */
203 int top; /* top scroll limit */
204 int bot; /* bottom scroll limit */
205 int mode; /* terminal mode flags */
206 int esc; /* escape state flags */
207 bool numlock; /* lock numbers in keyboard */
208 bool *tabs;
209 } Term;
210
211 /* Purely graphic info */
212 typedef struct {
213 Display *dpy;
214 Colourmap cmap;
215 Window win;
216 Drawable buf;
217 Atom xembed, wmdeletewin;
218 XIM xim;
219 XIC xic;
220 Draw draw;
221 Visual *vis;
222 XSetWindowAttributes attrs;
223 int scr;
224 bool isfixed; /* is fixed geometry? */
225 int fx, fy, fw, fh; /* fixed geometry */
226 int tw, th; /* tty width and height */
227 int w, h; /* window width and height */
228 int ch; /* char height */
229 int cw; /* char width */
230 char state; /* focus, redraw, visible */
231 } XWindow;
232
233 typedef struct {
234 int b;
235 uint mask;
236 char s[ESC_BUF_SIZ];
237 } Mousekey;
238
239 typedef struct {
240 KeySym k;
241 uint mask;
242 char s[ESC_BUF_SIZ];
243 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
244 signed char appkey; /* application keypad */
245 signed char appcursor; /* application cursor */
246 signed char crlf; /* crlf mode */
247 } Key;
248
249 typedef struct {
250 int mode;
251 int type;
252 int snap;
253 /*
254 * Selection variables:
255 * nb – normalized coordinates of the beginning of the selection
256 * ne – normalized coordinates of the end of the selection
257 * ob – original coordinates of the beginning of the selection
258 * oe – original coordinates of the end of the selection
259 */
260 struct {
261 int x, y;
262 } nb, ne, ob, oe;
263
264 char *clip;
265 Atom xtarget;
266 bool alt;
267 struct timeval tclick1;
268 struct timeval tclick2;
269 } Selection;
270
271 typedef union {
272 int i;
273 unsigned int ui;
274 float f;
275 const void *v;
276 } Arg;
277
278 typedef struct {
279 unsigned int mod;
280 KeySym keysym;
281 void (*func)(const Arg *);
282 const Arg arg;
283 } Shortcut;
284
285 /* function definitions used in config.h */
286 static void clippaste(const Arg *);
287 static void numlock(const Arg *);
288 static void selpaste(const Arg *);
289 static void xzoom(const Arg *);
290
291 /* Config.h for applying patches and the configuration. */
292 #include "config.h"
293
294 /* Font structure */
295 typedef struct {
296 int height;
297 int width;
298 int ascent;
299 int descent;
300 short lbearing;
301 short rbearing;
302 XftFont *match;
303 FcFontSet *set;
304 FcPattern *pattern;
305 } Font;
306
307 /* Drawing Context */
308 typedef struct {
309 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
310 Font font, bfont, ifont, ibfont;
311 GC gc;
312 } DC;
313
314 static void die(const char *, ...);
315 static void draw(void);
316 static void redraw(int);
317 static void drawregion(int, int, int, int);
318 static void execsh(void);
319 static void sigchld(int);
320 static void run(void);
321
322 static void csidump(void);
323 static void csihandle(void);
324 static void csiparse(void);
325 static void csireset(void);
326 static void strdump(void);
327 static void strhandle(void);
328 static void strparse(void);
329 static void strreset(void);
330
331 static int tattrset(int);
332 static void tclearregion(int, int, int, int);
333 static void tcursor(int);
334 static void tdeletechar(int);
335 static void tdeleteline(int);
336 static void tinsertblank(int);
337 static void tinsertblankline(int);
338 static void tmoveto(int, int);
339 static void tmoveato(int x, int y);
340 static void tnew(int, int);
341 static void tnewline(int);
342 static void tputtab(bool);
343 static void tputc(char *, int);
344 static void treset(void);
345 static int tresize(int, int);
346 static void tscrollup(int, int);
347 static void tscrolldown(int, int);
348 static void tsetattr(int*, int);
349 static void tsetchar(char *, Glyph *, int, int);
350 static void tsetscroll(int, int);
351 static void tswapscreen(void);
352 static void tsetdirt(int, int);
353 static void tsetdirtattr(int);
354 static void tsetmode(bool, bool, int *, int);
355 static void tfulldirt(void);
356 static void techo(char *, int);
357
358 static inline bool match(uint, uint);
359 static void ttynew(void);
360 static void ttyread(void);
361 static void ttyresize(void);
362 static void ttywrite(const char *, size_t);
363
364 static void xdraws(char *, Glyph, int, int, int, int);
365 static void xhints(void);
366 static void xclear(int, int, int, int);
367 static void xdrawcursor(void);
368 static void xinit(void);
369 static void xloadcols(void);
370 static int xsetcolorname(int, const char *);
371 static int xloadfont(Font *, FcPattern *);
372 static void xloadfonts(char *, int);
373 static int xloadfontset(Font *);
374 static void xsettitle(char *);
375 static void xresettitle(void);
376 static void xsetpointermotion(int);
377 static void xseturgency(int);
378 static void xsetsel(char*);
379 static void xtermclear(int, int, int, int);
380 static void xunloadfont(Font *f);
381 static void xunloadfonts(void);
382 static void xresize(int, int);
383
384 static void expose(XEvent *);
385 static void visibility(XEvent *);
386 static void unmap(XEvent *);
387 static char *kmap(KeySym, uint);
388 static void kpress(XEvent *);
389 static void cmessage(XEvent *);
390 static void cresize(int, int);
391 static void resize(XEvent *);
392 static void focus(XEvent *);
393 static void brelease(XEvent *);
394 static void bpress(XEvent *);
395 static void bmotion(XEvent *);
396 static void selnotify(XEvent *);
397 static void selclear(XEvent *);
398 static void selrequest(XEvent *);
399
400 static void selinit(void);
401 static void selsort(void);
402 static inline bool selected(int, int);
403 static void selcopy(void);
404 static void selscroll(int, int);
405 static void selsnap(int, int *, int *, int);
406
407 static int utf8decode(char *, long *);
408 static int utf8encode(long *, char *);
409 static int utf8size(char *);
410 static int isfullutf8(char *, int);
411
412 static ssize_t xwrite(int, char *, size_t);
413 static void *xmalloc(size_t);
414 static void *xrealloc(void *, size_t);
415 static void *xcalloc(size_t, size_t);
416
417 static void (*handler[LASTEvent])(XEvent *) = {
418 [KeyPress] = kpress,
419 [ClientMessage] = cmessage,
420 [ConfigureNotify] = resize,
421 [VisibilityNotify] = visibility,
422 [UnmapNotify] = unmap,
423 [Expose] = expose,
424 [FocusIn] = focus,
425 [FocusOut] = focus,
426 [MotionNotify] = bmotion,
427 [ButtonPress] = bpress,
428 [ButtonRelease] = brelease,
429 [SelectionClear] = selclear,
430 [SelectionNotify] = selnotify,
431 [SelectionRequest] = selrequest,
432 };
433
434 /* Globals */
435 static DC dc;
436 static XWindow xw;
437 static Term term;
438 static CSIEscape csiescseq;
439 static STREscape strescseq;
440 static int cmdfd;
441 static pid_t pid;
442 static Selection sel;
443 static int iofd = -1;
444 static char **opt_cmd = NULL;
445 static char *opt_io = NULL;
446 static char *opt_title = NULL;
447 static char *opt_embed = NULL;
448 static char *opt_class = NULL;
449 static char *opt_font = NULL;
450 static int oldbutton = 3; /* button event on startup: 3 = release */
451
452 static char *usedfont = NULL;
453 static int usedfontsize = 0;
454
455 /* Font Ring Cache */
456 enum {
457 FRC_NORMAL,
458 FRC_ITALIC,
459 FRC_BOLD,
460 FRC_ITALICBOLD
461 };
462
463 typedef struct {
464 XftFont *font;
465 long c;
466 int flags;
467 } Fontcache;
468
469 /*
470 * Fontcache is a ring buffer, with frccur as current position and frclen as
471 * the current length of used elements.
472 */
473
474 static Fontcache frc[1024];
475 static int frccur = -1, frclen = 0;
476
477 ssize_t
478 xwrite(int fd, char *s, size_t len) {
479 size_t aux = len;
480
481 while(len > 0) {
482 ssize_t r = write(fd, s, len);
483 if(r < 0)
484 return r;
485 len -= r;
486 s += r;
487 }
488 return aux;
489 }
490
491 void *
492 xmalloc(size_t len) {
493 void *p = malloc(len);
494
495 if(!p)
496 die("Out of memory\n");
497
498 return p;
499 }
500
501 void *
502 xrealloc(void *p, size_t len) {
503 if((p = realloc(p, len)) == NULL)
504 die("Out of memory\n");
505
506 return p;
507 }
508
509 void *
510 xcalloc(size_t nmemb, size_t size) {
511 void *p = calloc(nmemb, size);
512
513 if(!p)
514 die("Out of memory\n");
515
516 return p;
517 }
518
519 int
520 utf8decode(char *s, long *u) {
521 uchar c;
522 int i, n, rtn;
523
524 rtn = 1;
525 c = *s;
526 if(~c & 0x80) { /* 0xxxxxxx */
527 *u = c;
528 return rtn;
529 } else if((c & 0xE0) == 0xC0) { /* 110xxxxx */
530 *u = c & 0x1F;
531 n = 1;
532 } else if((c & 0xF0) == 0xE0) { /* 1110xxxx */
533 *u = c & 0x0F;
534 n = 2;
535 } else if((c & 0xF8) == 0xF0) { /* 11110xxx */
536 *u = c & 0x07;
537 n = 3;
538 } else {
539 goto invalid;
540 }
541
542 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
543 c = *s;
544 if((c & 0xC0) != 0x80) /* 10xxxxxx */
545 goto invalid;
546 *u <<= 6;
547 *u |= c & 0x3F;
548 }
549
550 if((n == 1 && *u < 0x80) ||
551 (n == 2 && *u < 0x800) ||
552 (n == 3 && *u < 0x10000) ||
553 (*u >= 0xD800 && *u <= 0xDFFF)) {
554 goto invalid;
555 }
556
557 return rtn;
558 invalid:
559 *u = 0xFFFD;
560
561 return rtn;
562 }
563
564 int
565 utf8encode(long *u, char *s) {
566 uchar *sp;
567 ulong uc;
568 int i, n;
569
570 sp = (uchar *)s;
571 uc = *u;
572 if(uc < 0x80) {
573 *sp = uc; /* 0xxxxxxx */
574 return 1;
575 } else if(*u < 0x800) {
576 *sp = (uc >> 6) | 0xC0; /* 110xxxxx */
577 n = 1;
578 } else if(uc < 0x10000) {
579 *sp = (uc >> 12) | 0xE0; /* 1110xxxx */
580 n = 2;
581 } else if(uc <= 0x10FFFF) {
582 *sp = (uc >> 18) | 0xF0; /* 11110xxx */
583 n = 3;
584 } else {
585 goto invalid;
586 }
587
588 for(i=n,++sp; i>0; --i,++sp)
589 *sp = ((uc >> 6*(i-1)) & 0x3F) | 0x80; /* 10xxxxxx */
590
591 return n+1;
592 invalid:
593 /* U+FFFD */
594 *s++ = '\xEF';
595 *s++ = '\xBF';
596 *s = '\xBD';
597
598 return 3;
599 }
600
601 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
602 UTF-8 otherwise return 0 */
603 int
604 isfullutf8(char *s, int b) {
605 uchar *c1, *c2, *c3;
606
607 c1 = (uchar *)s;
608 c2 = (uchar *)++s;
609 c3 = (uchar *)++s;
610 if(b < 1) {
611 return 0;
612 } else if((*c1 & 0xE0) == 0xC0 && b == 1) {
613 return 0;
614 } else if((*c1 & 0xF0) == 0xE0 &&
615 ((b == 1) ||
616 ((b == 2) && (*c2 & 0xC0) == 0x80))) {
617 return 0;
618 } else if((*c1 & 0xF8) == 0xF0 &&
619 ((b == 1) ||
620 ((b == 2) && (*c2 & 0xC0) == 0x80) ||
621 ((b == 3) && (*c2 & 0xC0) == 0x80 && (*c3 & 0xC0) == 0x80))) {
622 return 0;
623 } else {
624 return 1;
625 }
626 }
627
628 int
629 utf8size(char *s) {
630 uchar c = *s;
631
632 if(~c & 0x80) {
633 return 1;
634 } else if((c & 0xE0) == 0xC0) {
635 return 2;
636 } else if((c & 0xF0) == 0xE0) {
637 return 3;
638 } else {
639 return 4;
640 }
641 }
642
643 static void
644 selinit(void) {
645 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
646 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
647 sel.mode = 0;
648 sel.ob.x = -1;
649 sel.clip = 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 void
672 selsort(void) {
673 if(sel.ob.y == sel.oe.y) {
674 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
675 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
676 } else {
677 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
678 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
679 }
680 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
681 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
682 }
683
684 static inline bool
685 selected(int x, int y) {
686 if(sel.ne.y == y && sel.nb.y == y)
687 return BETWEEN(x, sel.nb.x, sel.ne.x);
688
689 if(sel.type == SEL_RECTANGULAR) {
690 return ((sel.nb.y <= y && y <= sel.ne.y)
691 && (sel.nb.x <= x && x <= sel.ne.x));
692 }
693
694 return ((sel.nb.y < y && y < sel.ne.y)
695 || (y == sel.ne.y && x <= sel.ne.x))
696 || (y == sel.nb.y && x >= sel.nb.x
697 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
698 }
699
700 void
701 selsnap(int mode, int *x, int *y, int direction) {
702 int i;
703
704 switch(mode) {
705 case SNAP_WORD:
706 /*
707 * Snap around if the word wraps around at the end or
708 * beginning of a line.
709 */
710 for(;;) {
711 if(direction < 0 && *x <= 0) {
712 if(*y > 0 && term.line[*y - 1][term.col-1].mode
713 & ATTR_WRAP) {
714 *y -= 1;
715 *x = term.col-1;
716 } else {
717 break;
718 }
719 }
720 if(direction > 0 && *x >= term.col-1) {
721 if(*y < term.row-1 && term.line[*y][*x].mode
722 & ATTR_WRAP) {
723 *y += 1;
724 *x = 0;
725 } else {
726 break;
727 }
728 }
729
730 if(strchr(worddelimiters,
731 term.line[*y][*x + direction].c[0])) {
732 break;
733 }
734
735 *x += direction;
736 }
737 break;
738 case SNAP_LINE:
739 /*
740 * Snap around if the the previous line or the current one
741 * has set ATTR_WRAP at its end. Then the whole next or
742 * previous line will be selected.
743 */
744 *x = (direction < 0) ? 0 : term.col - 1;
745 if(direction < 0 && *y > 0) {
746 for(; *y > 0; *y += direction) {
747 if(!(term.line[*y-1][term.col-1].mode
748 & ATTR_WRAP)) {
749 break;
750 }
751 }
752 } else if(direction > 0 && *y < term.row-1) {
753 for(; *y < term.row; *y += direction) {
754 if(!(term.line[*y][term.col-1].mode
755 & ATTR_WRAP)) {
756 break;
757 }
758 }
759 }
760 break;
761 default:
762 /*
763 * Select the whole line when the end of line is reached.
764 */
765 if(direction > 0) {
766 i = term.col;
767 while(--i > 0 && term.line[*y][i].c[0] == ' ')
768 /* nothing */;
769 if(i > 0 && i < *x)
770 *x = term.col - 1;
771 }
772 break;
773 }
774 }
775
776 void
777 getbuttoninfo(XEvent *e) {
778 int type;
779 uint state = e->xbutton.state &~Button1Mask;
780
781 sel.alt = IS_SET(MODE_ALTSCREEN);
782
783 sel.oe.x = x2col(e->xbutton.x);
784 sel.oe.y = y2row(e->xbutton.y);
785
786 if(sel.ob.y < sel.oe.y
787 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
788 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
789 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
790 } else {
791 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
792 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
793 }
794 selsort();
795
796 sel.type = SEL_REGULAR;
797 for(type = 1; type < LEN(selmasks); ++type) {
798 if(match(selmasks[type], state)) {
799 sel.type = type;
800 break;
801 }
802 }
803 }
804
805 void
806 mousereport(XEvent *e) {
807 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
808 button = e->xbutton.button, state = e->xbutton.state,
809 len;
810 char buf[40];
811 static int ox, oy;
812
813 /* from urxvt */
814 if(e->xbutton.type == MotionNotify) {
815 if(x == ox && y == oy)
816 return;
817 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
818 return;
819 /* MOUSE_MOTION: no reporting if no button is pressed */
820 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
821 return;
822
823 button = oldbutton + 32;
824 ox = x;
825 oy = y;
826 } else if(!IS_SET(MODE_MOUSESGR)
827 && (e->xbutton.type == ButtonRelease
828 || button == AnyButton)) {
829 button = 3;
830 } else {
831 button -= Button1;
832 if(button >= 3)
833 button += 64 - 3;
834 if(e->xbutton.type == ButtonPress) {
835 oldbutton = button;
836 ox = x;
837 oy = y;
838 }
839 }
840
841 if(!IS_SET(MODE_MOUSEX10)) {
842 button += (state & ShiftMask ? 4 : 0)
843 + (state & Mod4Mask ? 8 : 0)
844 + (state & ControlMask ? 16 : 0);
845 }
846
847 len = 0;
848 if(IS_SET(MODE_MOUSESGR)) {
849 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
850 button, x+1, y+1,
851 e->xbutton.type == ButtonRelease ? 'm' : 'M');
852 } else if(x < 223 && y < 223) {
853 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
854 IS_SET(MODE_MOUSEX10)? button-1 : 32+button,
855 32+x+1, 32+y+1);
856 } else {
857 return;
858 }
859
860 ttywrite(buf, len);
861 }
862
863 void
864 bpress(XEvent *e) {
865 struct timeval now;
866 Mousekey *mk;
867
868 if(IS_SET(MODE_MOUSE)) {
869 mousereport(e);
870 return;
871 }
872
873 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
874 if(e->xbutton.button == mk->b
875 && match(mk->mask, e->xbutton.state)) {
876 ttywrite(mk->s, strlen(mk->s));
877 if(IS_SET(MODE_ECHO))
878 techo(mk->s, strlen(mk->s));
879 return;
880 }
881 }
882
883 if(e->xbutton.button == Button1) {
884 gettimeofday(&now, NULL);
885
886 /* Clear previous selection, logically and visually. */
887 selclear(NULL);
888 sel.mode = 1;
889 sel.type = SEL_REGULAR;
890 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
891 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
892
893 /*
894 * If the user clicks below predefined timeouts specific
895 * snapping behaviour is exposed.
896 */
897 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
898 sel.snap = SNAP_LINE;
899 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
900 sel.snap = SNAP_WORD;
901 } else {
902 sel.snap = 0;
903 }
904 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
905 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
906 selsort();
907
908 /*
909 * Draw selection, unless it's regular and we don't want to
910 * make clicks visible
911 */
912 if(sel.snap != 0) {
913 sel.mode++;
914 tsetdirt(sel.nb.y, sel.ne.y);
915 }
916 sel.tclick2 = sel.tclick1;
917 sel.tclick1 = now;
918 }
919 }
920
921 void
922 selcopy(void) {
923 char *str, *ptr;
924 int x, y, bufsize, size, i, ex;
925 Glyph *gp, *last;
926
927 if(sel.ob.x == -1) {
928 str = NULL;
929 } else {
930 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
931 ptr = str = xmalloc(bufsize);
932
933 /* append every set & selected glyph to the selection */
934 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
935 gp = &term.line[y][0];
936 last = gp + term.col;
937
938 while(--last >= gp && !(selected(last - gp, y) && \
939 strcmp(last->c, " ") != 0))
940 /* nothing */;
941
942 for(x = 0; gp <= last; x++, ++gp) {
943 if(!selected(x, y))
944 continue;
945
946 size = utf8size(gp->c);
947 memcpy(ptr, gp->c, size);
948 ptr += size;
949 }
950
951 /*
952 * Copy and pasting of line endings is inconsistent
953 * in the inconsistent terminal and GUI world.
954 * The best solution seems like to produce '\n' when
955 * something is copied from st and convert '\n' to
956 * '\r', when something to be pasted is received by
957 * st.
958 * FIXME: Fix the computer world.
959 */
960 if(y < sel.ne.y && !((gp-1)->mode & ATTR_WRAP))
961 *ptr++ = '\n';
962
963 /*
964 * If the last selected line expands in the selection
965 * after the visible text '\n' is appended.
966 */
967 if(y == sel.ne.y) {
968 i = term.col;
969 while(--i > 0 && term.line[y][i].c[0] == ' ')
970 /* nothing */;
971 ex = sel.ne.x;
972 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
973 ex = sel.nb.x;
974 if(i < ex)
975 *ptr++ = '\n';
976 }
977 }
978 *ptr = 0;
979 }
980 xsetsel(str);
981 }
982
983 void
984 selnotify(XEvent *e) {
985 ulong nitems, ofs, rem;
986 int format;
987 uchar *data, *last, *repl;
988 Atom type;
989
990 ofs = 0;
991 do {
992 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
993 False, AnyPropertyType, &type, &format,
994 &nitems, &rem, &data)) {
995 fprintf(stderr, "Clipboard allocation failed\n");
996 return;
997 }
998
999 /*
1000 * As seen in selcopy:
1001 * Line endings are inconsistent in the terminal and GUI world
1002 * copy and pasting. When receiving some selection data,
1003 * replace all '\n' with '\r'.
1004 * FIXME: Fix the computer world.
1005 */
1006 repl = data;
1007 last = data + nitems * format / 8;
1008 while((repl = memchr(repl, '\n', last - repl))) {
1009 *repl++ = '\r';
1010 }
1011
1012 ttywrite((const char *)data, nitems * format / 8);
1013 XFree(data);
1014 /* number of 32-bit chunks returned */
1015 ofs += nitems * format / 32;
1016 } while(rem > 0);
1017 }
1018
1019 void
1020 selpaste(const Arg *dummy) {
1021 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1022 xw.win, CurrentTime);
1023 }
1024
1025 void
1026 clippaste(const Arg *dummy) {
1027 Atom clipboard;
1028
1029 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1030 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1031 xw.win, CurrentTime);
1032 }
1033
1034 void
1035 selclear(XEvent *e) {
1036 if(sel.ob.x == -1)
1037 return;
1038 sel.ob.x = -1;
1039 tsetdirt(sel.nb.y, sel.ne.y);
1040 }
1041
1042 void
1043 selrequest(XEvent *e) {
1044 XSelectionRequestEvent *xsre;
1045 XSelectionEvent xev;
1046 Atom xa_targets, string;
1047
1048 xsre = (XSelectionRequestEvent *) e;
1049 xev.type = SelectionNotify;
1050 xev.requestor = xsre->requestor;
1051 xev.selection = xsre->selection;
1052 xev.target = xsre->target;
1053 xev.time = xsre->time;
1054 /* reject */
1055 xev.property = None;
1056
1057 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1058 if(xsre->target == xa_targets) {
1059 /* respond with the supported type */
1060 string = sel.xtarget;
1061 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1062 XA_ATOM, 32, PropModeReplace,
1063 (uchar *) &string, 1);
1064 xev.property = xsre->property;
1065 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1066 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1067 xsre->target, 8, PropModeReplace,
1068 (uchar *) sel.clip, strlen(sel.clip));
1069 xev.property = xsre->property;
1070 }
1071
1072 /* all done, send a notification to the listener */
1073 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1074 fprintf(stderr, "Error sending SelectionNotify event\n");
1075 }
1076
1077 void
1078 xsetsel(char *str) {
1079 /* register the selection for both the clipboard and the primary */
1080 Atom clipboard;
1081
1082 free(sel.clip);
1083 sel.clip = str;
1084
1085 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1086
1087 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1088 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1089 }
1090
1091 void
1092 brelease(XEvent *e) {
1093 if(IS_SET(MODE_MOUSE)) {
1094 mousereport(e);
1095 return;
1096 }
1097
1098 if(e->xbutton.button == Button2) {
1099 selpaste(NULL);
1100 } else if(e->xbutton.button == Button1) {
1101 if(sel.mode < 2) {
1102 selclear(NULL);
1103 } else {
1104 getbuttoninfo(e);
1105 selcopy();
1106 }
1107 sel.mode = 0;
1108 tsetdirt(sel.nb.y, sel.ne.y);
1109 }
1110 }
1111
1112 void
1113 bmotion(XEvent *e) {
1114 int oldey, oldex, oldsby, oldsey;
1115
1116 if(IS_SET(MODE_MOUSE)) {
1117 mousereport(e);
1118 return;
1119 }
1120
1121 if(!sel.mode)
1122 return;
1123
1124 sel.mode++;
1125 oldey = sel.oe.y;
1126 oldex = sel.oe.x;
1127 oldsby = sel.nb.y;
1128 oldsey = sel.ne.y;
1129 getbuttoninfo(e);
1130
1131 if(oldey != sel.oe.y || oldex != sel.oe.x)
1132 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1133 }
1134
1135 void
1136 die(const char *errstr, ...) {
1137 va_list ap;
1138
1139 va_start(ap, errstr);
1140 vfprintf(stderr, errstr, ap);
1141 va_end(ap);
1142 exit(EXIT_FAILURE);
1143 }
1144
1145 void
1146 execsh(void) {
1147 char **args;
1148 char *envshell = getenv("SHELL");
1149 const struct passwd *pass = getpwuid(getuid());
1150 char buf[sizeof(long) * 8 + 1];
1151
1152 unsetenv("COLUMNS");
1153 unsetenv("LINES");
1154 unsetenv("TERMCAP");
1155
1156 if(pass) {
1157 setenv("LOGNAME", pass->pw_name, 1);
1158 setenv("USER", pass->pw_name, 1);
1159 setenv("SHELL", pass->pw_shell, 0);
1160 setenv("HOME", pass->pw_dir, 0);
1161 }
1162
1163 snprintf(buf, sizeof(buf), "%lu", xw.win);
1164 setenv("WINDOWID", buf, 1);
1165
1166 signal(SIGCHLD, SIG_DFL);
1167 signal(SIGHUP, SIG_DFL);
1168 signal(SIGINT, SIG_DFL);
1169 signal(SIGQUIT, SIG_DFL);
1170 signal(SIGTERM, SIG_DFL);
1171 signal(SIGALRM, SIG_DFL);
1172
1173 DEFAULT(envshell, shell);
1174 setenv("TERM", termname, 1);
1175 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1176 execvp(args[0], args);
1177 exit(EXIT_FAILURE);
1178 }
1179
1180 void
1181 sigchld(int a) {
1182 int stat = 0;
1183
1184 if(waitpid(pid, &stat, 0) < 0)
1185 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1186
1187 if(WIFEXITED(stat)) {
1188 exit(WEXITSTATUS(stat));
1189 } else {
1190 exit(EXIT_FAILURE);
1191 }
1192 }
1193
1194 void
1195 ttynew(void) {
1196 int m, s;
1197 struct winsize w = {term.row, term.col, 0, 0};
1198
1199 /* seems to work fine on linux, openbsd and freebsd */
1200 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1201 die("openpty failed: %s\n", SERRNO);
1202
1203 switch(pid = fork()) {
1204 case -1:
1205 die("fork failed\n");
1206 break;
1207 case 0:
1208 setsid(); /* create a new process group */
1209 dup2(s, STDIN_FILENO);
1210 dup2(s, STDOUT_FILENO);
1211 dup2(s, STDERR_FILENO);
1212 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1213 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1214 close(s);
1215 close(m);
1216 execsh();
1217 break;
1218 default:
1219 close(s);
1220 cmdfd = m;
1221 signal(SIGCHLD, sigchld);
1222 if(opt_io) {
1223 iofd = (!strcmp(opt_io, "-")) ?
1224 STDOUT_FILENO :
1225 open(opt_io, O_WRONLY | O_CREAT, 0666);
1226 if(iofd < 0) {
1227 fprintf(stderr, "Error opening %s:%s\n",
1228 opt_io, strerror(errno));
1229 }
1230 }
1231 }
1232 }
1233
1234 void
1235 dump(char c) {
1236 static int col;
1237
1238 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1239 if(++col % 10 == 0)
1240 fprintf(stderr, "\n");
1241 }
1242
1243 void
1244 ttyread(void) {
1245 static char buf[BUFSIZ];
1246 static int buflen = 0;
1247 char *ptr;
1248 char s[UTF_SIZ];
1249 int charsize; /* size of utf8 char in bytes */
1250 long utf8c;
1251 int ret;
1252
1253 /* append read bytes to unprocessed bytes */
1254 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1255 die("Couldn't read from shell: %s\n", SERRNO);
1256
1257 /* process every complete utf8 char */
1258 buflen += ret;
1259 ptr = buf;
1260 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1261 charsize = utf8decode(ptr, &utf8c);
1262 utf8encode(&utf8c, s);
1263 tputc(s, charsize);
1264 ptr += charsize;
1265 buflen -= charsize;
1266 }
1267
1268 /* keep any uncomplete utf8 char for the next call */
1269 memmove(buf, ptr, buflen);
1270 }
1271
1272 void
1273 ttywrite(const char *s, size_t n) {
1274 if(write(cmdfd, s, n) == -1)
1275 die("write error on tty: %s\n", SERRNO);
1276 }
1277
1278 void
1279 ttyresize(void) {
1280 struct winsize w;
1281
1282 w.ws_row = term.row;
1283 w.ws_col = term.col;
1284 w.ws_xpixel = xw.tw;
1285 w.ws_ypixel = xw.th;
1286 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1287 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1288 }
1289
1290 int
1291 tattrset(int attr) {
1292 int i, j;
1293
1294 for(i = 0; i < term.row-1; i++) {
1295 for(j = 0; j < term.col-1; j++) {
1296 if(term.line[i][j].mode & attr)
1297 return 1;
1298 }
1299 }
1300
1301 return 0;
1302 }
1303
1304 void
1305 tsetdirt(int top, int bot) {
1306 int i;
1307
1308 LIMIT(top, 0, term.row-1);
1309 LIMIT(bot, 0, term.row-1);
1310
1311 for(i = top; i <= bot; i++)
1312 term.dirty[i] = 1;
1313 }
1314
1315 void
1316 tsetdirtattr(int attr) {
1317 int i, j;
1318
1319 for(i = 0; i < term.row-1; i++) {
1320 for(j = 0; j < term.col-1; j++) {
1321 if(term.line[i][j].mode & attr) {
1322 tsetdirt(i, i);
1323 break;
1324 }
1325 }
1326 }
1327 }
1328
1329 void
1330 tfulldirt(void) {
1331 tsetdirt(0, term.row-1);
1332 }
1333
1334 void
1335 tcursor(int mode) {
1336 static TCursor c;
1337
1338 if(mode == CURSOR_SAVE) {
1339 c = term.c;
1340 } else if(mode == CURSOR_LOAD) {
1341 term.c = c;
1342 tmoveto(c.x, c.y);
1343 }
1344 }
1345
1346 void
1347 treset(void) {
1348 uint i;
1349
1350 term.c = (TCursor){{
1351 .mode = ATTR_NULL,
1352 .fg = defaultfg,
1353 .bg = defaultbg
1354 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1355
1356 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1357 for(i = tabspaces; i < term.col; i += tabspaces)
1358 term.tabs[i] = 1;
1359 term.top = 0;
1360 term.bot = term.row - 1;
1361 term.mode = MODE_WRAP;
1362
1363 tclearregion(0, 0, term.col-1, term.row-1);
1364 tmoveto(0, 0);
1365 tcursor(CURSOR_SAVE);
1366 }
1367
1368 void
1369 tnew(int col, int row) {
1370 memset(&term, 0, sizeof(Term));
1371 tresize(col, row);
1372 term.numlock = 1;
1373
1374 treset();
1375 }
1376
1377 void
1378 tswapscreen(void) {
1379 Line *tmp = term.line;
1380
1381 term.line = term.alt;
1382 term.alt = tmp;
1383 term.mode ^= MODE_ALTSCREEN;
1384 tfulldirt();
1385 }
1386
1387 void
1388 tscrolldown(int orig, int n) {
1389 int i;
1390 Line temp;
1391
1392 LIMIT(n, 0, term.bot-orig+1);
1393
1394 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1395
1396 for(i = term.bot; i >= orig+n; i--) {
1397 temp = term.line[i];
1398 term.line[i] = term.line[i-n];
1399 term.line[i-n] = temp;
1400
1401 term.dirty[i] = 1;
1402 term.dirty[i-n] = 1;
1403 }
1404
1405 selscroll(orig, n);
1406 }
1407
1408 void
1409 tscrollup(int orig, int n) {
1410 int i;
1411 Line temp;
1412 LIMIT(n, 0, term.bot-orig+1);
1413
1414 tclearregion(0, orig, term.col-1, orig+n-1);
1415
1416 for(i = orig; i <= term.bot-n; i++) {
1417 temp = term.line[i];
1418 term.line[i] = term.line[i+n];
1419 term.line[i+n] = temp;
1420
1421 term.dirty[i] = 1;
1422 term.dirty[i+n] = 1;
1423 }
1424
1425 selscroll(orig, -n);
1426 }
1427
1428 void
1429 selscroll(int orig, int n) {
1430 if(sel.ob.x == -1)
1431 return;
1432
1433 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1434 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1435 selclear(NULL);
1436 return;
1437 }
1438 if(sel.type == SEL_RECTANGULAR) {
1439 if(sel.ob.y < term.top)
1440 sel.ob.y = term.top;
1441 if(sel.oe.y > term.bot)
1442 sel.oe.y = term.bot;
1443 } else {
1444 if(sel.ob.y < term.top) {
1445 sel.ob.y = term.top;
1446 sel.ob.x = 0;
1447 }
1448 if(sel.oe.y > term.bot) {
1449 sel.oe.y = term.bot;
1450 sel.oe.x = term.col;
1451 }
1452 }
1453 selsort();
1454 }
1455 }
1456
1457 void
1458 tnewline(int first_col) {
1459 int y = term.c.y;
1460
1461 if(y == term.bot) {
1462 tscrollup(term.top, 1);
1463 } else {
1464 y++;
1465 }
1466 tmoveto(first_col ? 0 : term.c.x, y);
1467 }
1468
1469 void
1470 csiparse(void) {
1471 char *p = csiescseq.buf, *np;
1472 long int v;
1473
1474 csiescseq.narg = 0;
1475 if(*p == '?') {
1476 csiescseq.priv = 1;
1477 p++;
1478 }
1479
1480 csiescseq.buf[csiescseq.len] = '\0';
1481 while(p < csiescseq.buf+csiescseq.len) {
1482 np = NULL;
1483 v = strtol(p, &np, 10);
1484 if(np == p)
1485 v = 0;
1486 if(v == LONG_MAX || v == LONG_MIN)
1487 v = -1;
1488 csiescseq.arg[csiescseq.narg++] = v;
1489 p = np;
1490 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1491 break;
1492 p++;
1493 }
1494 csiescseq.mode = *p;
1495 }
1496
1497 /* for absolute user moves, when decom is set */
1498 void
1499 tmoveato(int x, int y) {
1500 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1501 }
1502
1503 void
1504 tmoveto(int x, int y) {
1505 int miny, maxy;
1506
1507 if(term.c.state & CURSOR_ORIGIN) {
1508 miny = term.top;
1509 maxy = term.bot;
1510 } else {
1511 miny = 0;
1512 maxy = term.row - 1;
1513 }
1514 LIMIT(x, 0, term.col-1);
1515 LIMIT(y, miny, maxy);
1516 term.c.state &= ~CURSOR_WRAPNEXT;
1517 term.c.x = x;
1518 term.c.y = y;
1519 }
1520
1521 void
1522 tsetchar(char *c, Glyph *attr, int x, int y) {
1523 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1524 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1525 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1526 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1527 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1528 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1529 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1530 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1531 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1532 };
1533
1534 /*
1535 * The table is proudly stolen from rxvt.
1536 */
1537 if(attr->mode & ATTR_GFX) {
1538 if(c[0] >= 0x41 && c[0] <= 0x7e
1539 && vt100_0[c[0] - 0x41]) {
1540 c = vt100_0[c[0] - 0x41];
1541 }
1542 }
1543
1544 term.dirty[y] = 1;
1545 term.line[y][x] = *attr;
1546 memcpy(term.line[y][x].c, c, UTF_SIZ);
1547 }
1548
1549 void
1550 tclearregion(int x1, int y1, int x2, int y2) {
1551 int x, y, temp;
1552
1553 if(x1 > x2)
1554 temp = x1, x1 = x2, x2 = temp;
1555 if(y1 > y2)
1556 temp = y1, y1 = y2, y2 = temp;
1557
1558 LIMIT(x1, 0, term.col-1);
1559 LIMIT(x2, 0, term.col-1);
1560 LIMIT(y1, 0, term.row-1);
1561 LIMIT(y2, 0, term.row-1);
1562
1563 for(y = y1; y <= y2; y++) {
1564 term.dirty[y] = 1;
1565 for(x = x1; x <= x2; x++) {
1566 if(selected(x, y))
1567 selclear(NULL);
1568 term.line[y][x] = term.c.attr;
1569 memcpy(term.line[y][x].c, " ", 2);
1570 }
1571 }
1572 }
1573
1574 void
1575 tdeletechar(int n) {
1576 int src = term.c.x + n;
1577 int dst = term.c.x;
1578 int size = term.col - src;
1579
1580 term.dirty[term.c.y] = 1;
1581
1582 if(src >= term.col) {
1583 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1584 return;
1585 }
1586
1587 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1588 size * sizeof(Glyph));
1589 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1590 }
1591
1592 void
1593 tinsertblank(int n) {
1594 int src = term.c.x;
1595 int dst = src + n;
1596 int size = term.col - dst;
1597
1598 term.dirty[term.c.y] = 1;
1599
1600 if(dst >= term.col) {
1601 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1602 return;
1603 }
1604
1605 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1606 size * sizeof(Glyph));
1607 tclearregion(src, term.c.y, dst - 1, term.c.y);
1608 }
1609
1610 void
1611 tinsertblankline(int n) {
1612 if(term.c.y < term.top || term.c.y > term.bot)
1613 return;
1614
1615 tscrolldown(term.c.y, n);
1616 }
1617
1618 void
1619 tdeleteline(int n) {
1620 if(term.c.y < term.top || term.c.y > term.bot)
1621 return;
1622
1623 tscrollup(term.c.y, n);
1624 }
1625
1626 void
1627 tsetattr(int *attr, int l) {
1628 int i;
1629
1630 for(i = 0; i < l; i++) {
1631 switch(attr[i]) {
1632 case 0:
1633 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1634 | ATTR_BOLD | ATTR_ITALIC \
1635 | ATTR_BLINK);
1636 term.c.attr.fg = defaultfg;
1637 term.c.attr.bg = defaultbg;
1638 break;
1639 case 1:
1640 term.c.attr.mode |= ATTR_BOLD;
1641 break;
1642 case 3:
1643 term.c.attr.mode |= ATTR_ITALIC;
1644 break;
1645 case 4:
1646 term.c.attr.mode |= ATTR_UNDERLINE;
1647 break;
1648 case 5: /* slow blink */
1649 case 6: /* rapid blink */
1650 term.c.attr.mode |= ATTR_BLINK;
1651 break;
1652 case 7:
1653 term.c.attr.mode |= ATTR_REVERSE;
1654 break;
1655 case 21:
1656 case 22:
1657 term.c.attr.mode &= ~ATTR_BOLD;
1658 break;
1659 case 23:
1660 term.c.attr.mode &= ~ATTR_ITALIC;
1661 break;
1662 case 24:
1663 term.c.attr.mode &= ~ATTR_UNDERLINE;
1664 break;
1665 case 25:
1666 case 26:
1667 term.c.attr.mode &= ~ATTR_BLINK;
1668 break;
1669 case 27:
1670 term.c.attr.mode &= ~ATTR_REVERSE;
1671 break;
1672 case 38:
1673 if(i + 2 < l && attr[i + 1] == 5) {
1674 i += 2;
1675 if(BETWEEN(attr[i], 0, 255)) {
1676 term.c.attr.fg = attr[i];
1677 } else {
1678 fprintf(stderr,
1679 "erresc: bad fgcolor %d\n",
1680 attr[i]);
1681 }
1682 } else {
1683 fprintf(stderr,
1684 "erresc(38): gfx attr %d unknown\n",
1685 attr[i]);
1686 }
1687 break;
1688 case 39:
1689 term.c.attr.fg = defaultfg;
1690 break;
1691 case 48:
1692 if(i + 2 < l && attr[i + 1] == 5) {
1693 i += 2;
1694 if(BETWEEN(attr[i], 0, 255)) {
1695 term.c.attr.bg = attr[i];
1696 } else {
1697 fprintf(stderr,
1698 "erresc: bad bgcolor %d\n",
1699 attr[i]);
1700 }
1701 } else {
1702 fprintf(stderr,
1703 "erresc(48): gfx attr %d unknown\n",
1704 attr[i]);
1705 }
1706 break;
1707 case 49:
1708 term.c.attr.bg = defaultbg;
1709 break;
1710 default:
1711 if(BETWEEN(attr[i], 30, 37)) {
1712 term.c.attr.fg = attr[i] - 30;
1713 } else if(BETWEEN(attr[i], 40, 47)) {
1714 term.c.attr.bg = attr[i] - 40;
1715 } else if(BETWEEN(attr[i], 90, 97)) {
1716 term.c.attr.fg = attr[i] - 90 + 8;
1717 } else if(BETWEEN(attr[i], 100, 107)) {
1718 term.c.attr.bg = attr[i] - 100 + 8;
1719 } else {
1720 fprintf(stderr,
1721 "erresc(default): gfx attr %d unknown\n",
1722 attr[i]), csidump();
1723 }
1724 break;
1725 }
1726 }
1727 }
1728
1729 void
1730 tsetscroll(int t, int b) {
1731 int temp;
1732
1733 LIMIT(t, 0, term.row-1);
1734 LIMIT(b, 0, term.row-1);
1735 if(t > b) {
1736 temp = t;
1737 t = b;
1738 b = temp;
1739 }
1740 term.top = t;
1741 term.bot = b;
1742 }
1743
1744 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1745
1746 void
1747 tsetmode(bool priv, bool set, int *args, int narg) {
1748 int *lim, mode;
1749 bool alt;
1750
1751 for(lim = args + narg; args < lim; ++args) {
1752 if(priv) {
1753 switch(*args) {
1754 break;
1755 case 1: /* DECCKM -- Cursor key */
1756 MODBIT(term.mode, set, MODE_APPCURSOR);
1757 break;
1758 case 5: /* DECSCNM -- Reverse video */
1759 mode = term.mode;
1760 MODBIT(term.mode, set, MODE_REVERSE);
1761 if(mode != term.mode)
1762 redraw(REDRAW_TIMEOUT);
1763 break;
1764 case 6: /* DECOM -- Origin */
1765 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1766 tmoveato(0, 0);
1767 break;
1768 case 7: /* DECAWM -- Auto wrap */
1769 MODBIT(term.mode, set, MODE_WRAP);
1770 break;
1771 case 0: /* Error (IGNORED) */
1772 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1773 case 3: /* DECCOLM -- Column (IGNORED) */
1774 case 4: /* DECSCLM -- Scroll (IGNORED) */
1775 case 8: /* DECARM -- Auto repeat (IGNORED) */
1776 case 18: /* DECPFF -- Printer feed (IGNORED) */
1777 case 19: /* DECPEX -- Printer extent (IGNORED) */
1778 case 42: /* DECNRCM -- National characters (IGNORED) */
1779 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1780 break;
1781 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1782 MODBIT(term.mode, !set, MODE_HIDE);
1783 break;
1784 case 9: /* X10 mouse compatibility mode */
1785 xsetpointermotion(0);
1786 MODBIT(term.mode, 0, MODE_MOUSE);
1787 MODBIT(term.mode, set, MODE_MOUSEX10);
1788 break;
1789 case 1000: /* 1000: report button press */
1790 xsetpointermotion(0);
1791 MODBIT(term.mode, 0, MODE_MOUSE);
1792 MODBIT(term.mode, set, MODE_MOUSEBTN);
1793 break;
1794 case 1002: /* 1002: report motion on button press */
1795 xsetpointermotion(0);
1796 MODBIT(term.mode, 0, MODE_MOUSE);
1797 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1798 break;
1799 case 1003: /* 1003: enable all mouse motions */
1800 xsetpointermotion(set);
1801 MODBIT(term.mode, 0, MODE_MOUSE);
1802 MODBIT(term.mode, set, MODE_MOUSEMANY);
1803 break;
1804 case 1004: /* 1004: send focus events to tty */
1805 MODBIT(term.mode, set, MODE_FOCUS);
1806 break;
1807 case 1006: /* 1006: extended reporting mode */
1808 MODBIT(term.mode, set, MODE_MOUSESGR);
1809 break;
1810 case 1034:
1811 MODBIT(term.mode, set, MODE_8BIT);
1812 break;
1813 case 1049: /* = 1047 and 1048 */
1814 case 47:
1815 case 1047:
1816 if (!allowaltscreen)
1817 break;
1818
1819 alt = IS_SET(MODE_ALTSCREEN);
1820 if(alt) {
1821 tclearregion(0, 0, term.col-1,
1822 term.row-1);
1823 }
1824 if(set ^ alt) /* set is always 1 or 0 */
1825 tswapscreen();
1826 if(*args != 1049)
1827 break;
1828 /* FALLTRU */
1829 case 1048:
1830 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1831 break;
1832 /* Not implemented mouse modes. See comments there. */
1833 case 1001: /* mouse highlight mode; can hang the
1834 terminal by design when implemented. */
1835 case 1005: /* UTF-8 mouse mode; will confuse
1836 applications not supporting UTF-8
1837 and luit. */
1838 case 1015: /* urxvt mangled mouse mode; incompatible
1839 and can be mistaken for other control
1840 codes. */
1841 default:
1842 fprintf(stderr,
1843 "erresc: unknown private set/reset mode %d\n",
1844 *args);
1845 break;
1846 }
1847 } else {
1848 switch(*args) {
1849 case 0: /* Error (IGNORED) */
1850 break;
1851 case 2: /* KAM -- keyboard action */
1852 MODBIT(term.mode, set, MODE_KBDLOCK);
1853 break;
1854 case 4: /* IRM -- Insertion-replacement */
1855 MODBIT(term.mode, set, MODE_INSERT);
1856 break;
1857 case 12: /* SRM -- Send/Receive */
1858 MODBIT(term.mode, !set, MODE_ECHO);
1859 break;
1860 case 20: /* LNM -- Linefeed/new line */
1861 MODBIT(term.mode, set, MODE_CRLF);
1862 break;
1863 default:
1864 fprintf(stderr,
1865 "erresc: unknown set/reset mode %d\n",
1866 *args);
1867 break;
1868 }
1869 }
1870 }
1871 }
1872
1873 void
1874 csihandle(void) {
1875 switch(csiescseq.mode) {
1876 default:
1877 unknown:
1878 fprintf(stderr, "erresc: unknown csi ");
1879 csidump();
1880 /* die(""); */
1881 break;
1882 case '@': /* ICH -- Insert <n> blank char */
1883 DEFAULT(csiescseq.arg[0], 1);
1884 tinsertblank(csiescseq.arg[0]);
1885 break;
1886 case 'A': /* CUU -- Cursor <n> Up */
1887 DEFAULT(csiescseq.arg[0], 1);
1888 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1889 break;
1890 case 'B': /* CUD -- Cursor <n> Down */
1891 case 'e': /* VPR --Cursor <n> Down */
1892 DEFAULT(csiescseq.arg[0], 1);
1893 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1894 break;
1895 case 'c': /* DA -- Device Attributes */
1896 if(csiescseq.arg[0] == 0)
1897 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1898 break;
1899 case 'C': /* CUF -- Cursor <n> Forward */
1900 case 'a': /* HPR -- Cursor <n> Forward */
1901 DEFAULT(csiescseq.arg[0], 1);
1902 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1903 break;
1904 case 'D': /* CUB -- Cursor <n> Backward */
1905 DEFAULT(csiescseq.arg[0], 1);
1906 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1907 break;
1908 case 'E': /* CNL -- Cursor <n> Down and first col */
1909 DEFAULT(csiescseq.arg[0], 1);
1910 tmoveto(0, term.c.y+csiescseq.arg[0]);
1911 break;
1912 case 'F': /* CPL -- Cursor <n> Up and first col */
1913 DEFAULT(csiescseq.arg[0], 1);
1914 tmoveto(0, term.c.y-csiescseq.arg[0]);
1915 break;
1916 case 'g': /* TBC -- Tabulation clear */
1917 switch(csiescseq.arg[0]) {
1918 case 0: /* clear current tab stop */
1919 term.tabs[term.c.x] = 0;
1920 break;
1921 case 3: /* clear all the tabs */
1922 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1923 break;
1924 default:
1925 goto unknown;
1926 }
1927 break;
1928 case 'G': /* CHA -- Move to <col> */
1929 case '`': /* HPA */
1930 DEFAULT(csiescseq.arg[0], 1);
1931 tmoveto(csiescseq.arg[0]-1, term.c.y);
1932 break;
1933 case 'H': /* CUP -- Move to <row> <col> */
1934 case 'f': /* HVP */
1935 DEFAULT(csiescseq.arg[0], 1);
1936 DEFAULT(csiescseq.arg[1], 1);
1937 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1938 break;
1939 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1940 DEFAULT(csiescseq.arg[0], 1);
1941 while(csiescseq.arg[0]--)
1942 tputtab(1);
1943 break;
1944 case 'J': /* ED -- Clear screen */
1945 selclear(NULL);
1946 switch(csiescseq.arg[0]) {
1947 case 0: /* below */
1948 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1949 if(term.c.y < term.row-1) {
1950 tclearregion(0, term.c.y+1, term.col-1,
1951 term.row-1);
1952 }
1953 break;
1954 case 1: /* above */
1955 if(term.c.y > 1)
1956 tclearregion(0, 0, term.col-1, term.c.y-1);
1957 tclearregion(0, term.c.y, term.c.x, term.c.y);
1958 break;
1959 case 2: /* all */
1960 tclearregion(0, 0, term.col-1, term.row-1);
1961 break;
1962 default:
1963 goto unknown;
1964 }
1965 break;
1966 case 'K': /* EL -- Clear line */
1967 switch(csiescseq.arg[0]) {
1968 case 0: /* right */
1969 tclearregion(term.c.x, term.c.y, term.col-1,
1970 term.c.y);
1971 break;
1972 case 1: /* left */
1973 tclearregion(0, term.c.y, term.c.x, term.c.y);
1974 break;
1975 case 2: /* all */
1976 tclearregion(0, term.c.y, term.col-1, term.c.y);
1977 break;
1978 }
1979 break;
1980 case 'S': /* SU -- Scroll <n> line up */
1981 DEFAULT(csiescseq.arg[0], 1);
1982 tscrollup(term.top, csiescseq.arg[0]);
1983 break;
1984 case 'T': /* SD -- Scroll <n> line down */
1985 DEFAULT(csiescseq.arg[0], 1);
1986 tscrolldown(term.top, csiescseq.arg[0]);
1987 break;
1988 case 'L': /* IL -- Insert <n> blank lines */
1989 DEFAULT(csiescseq.arg[0], 1);
1990 tinsertblankline(csiescseq.arg[0]);
1991 break;
1992 case 'l': /* RM -- Reset Mode */
1993 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1994 break;
1995 case 'M': /* DL -- Delete <n> lines */
1996 DEFAULT(csiescseq.arg[0], 1);
1997 tdeleteline(csiescseq.arg[0]);
1998 break;
1999 case 'X': /* ECH -- Erase <n> char */
2000 DEFAULT(csiescseq.arg[0], 1);
2001 tclearregion(term.c.x, term.c.y,
2002 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2003 break;
2004 case 'P': /* DCH -- Delete <n> char */
2005 DEFAULT(csiescseq.arg[0], 1);
2006 tdeletechar(csiescseq.arg[0]);
2007 break;
2008 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2009 DEFAULT(csiescseq.arg[0], 1);
2010 while(csiescseq.arg[0]--)
2011 tputtab(0);
2012 break;
2013 case 'd': /* VPA -- Move to <row> */
2014 DEFAULT(csiescseq.arg[0], 1);
2015 tmoveato(term.c.x, csiescseq.arg[0]-1);
2016 break;
2017 case 'h': /* SM -- Set terminal mode */
2018 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2019 break;
2020 case 'm': /* SGR -- Terminal attribute (color) */
2021 tsetattr(csiescseq.arg, csiescseq.narg);
2022 break;
2023 case 'r': /* DECSTBM -- Set Scrolling Region */
2024 if(csiescseq.priv) {
2025 goto unknown;
2026 } else {
2027 DEFAULT(csiescseq.arg[0], 1);
2028 DEFAULT(csiescseq.arg[1], term.row);
2029 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2030 tmoveato(0, 0);
2031 }
2032 break;
2033 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2034 tcursor(CURSOR_SAVE);
2035 break;
2036 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2037 tcursor(CURSOR_LOAD);
2038 break;
2039 }
2040 }
2041
2042 void
2043 csidump(void) {
2044 int i;
2045 uint c;
2046
2047 printf("ESC[");
2048 for(i = 0; i < csiescseq.len; i++) {
2049 c = csiescseq.buf[i] & 0xff;
2050 if(isprint(c)) {
2051 putchar(c);
2052 } else if(c == '\n') {
2053 printf("(\\n)");
2054 } else if(c == '\r') {
2055 printf("(\\r)");
2056 } else if(c == 0x1b) {
2057 printf("(\\e)");
2058 } else {
2059 printf("(%02x)", c);
2060 }
2061 }
2062 putchar('\n');
2063 }
2064
2065 void
2066 csireset(void) {
2067 memset(&csiescseq, 0, sizeof(csiescseq));
2068 }
2069
2070 void
2071 strhandle(void) {
2072 char *p = NULL;
2073 int i, j, narg;
2074
2075 strparse();
2076 narg = strescseq.narg;
2077
2078 switch(strescseq.type) {
2079 case ']': /* OSC -- Operating System Command */
2080 switch(i = atoi(strescseq.args[0])) {
2081 case 0:
2082 case 1:
2083 case 2:
2084 if(narg > 1)
2085 xsettitle(strescseq.args[1]);
2086 break;
2087 case 4: /* color set */
2088 if(narg < 3)
2089 break;
2090 p = strescseq.args[2];
2091 /* fall through */
2092 case 104: /* color reset, here p = NULL */
2093 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2094 if (!xsetcolorname(j, p)) {
2095 fprintf(stderr, "erresc: invalid color %s\n", p);
2096 } else {
2097 /*
2098 * TODO if defaultbg color is changed, borders
2099 * are dirty
2100 */
2101 redraw(0);
2102 }
2103 break;
2104 default:
2105 fprintf(stderr, "erresc: unknown str ");
2106 strdump();
2107 break;
2108 }
2109 break;
2110 case 'k': /* old title set compatibility */
2111 xsettitle(strescseq.args[0]);
2112 break;
2113 case 'P': /* DSC -- Device Control String */
2114 case '_': /* APC -- Application Program Command */
2115 case '^': /* PM -- Privacy Message */
2116 default:
2117 fprintf(stderr, "erresc: unknown str ");
2118 strdump();
2119 /* die(""); */
2120 break;
2121 }
2122 }
2123
2124 void
2125 strparse(void) {
2126 char *p = strescseq.buf;
2127
2128 strescseq.narg = 0;
2129 strescseq.buf[strescseq.len] = '\0';
2130 while(p && strescseq.narg < STR_ARG_SIZ)
2131 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2132 }
2133
2134 void
2135 strdump(void) {
2136 int i;
2137 uint c;
2138
2139 printf("ESC%c", strescseq.type);
2140 for(i = 0; i < strescseq.len; i++) {
2141 c = strescseq.buf[i] & 0xff;
2142 if(c == '\0') {
2143 return;
2144 } else if(isprint(c)) {
2145 putchar(c);
2146 } else if(c == '\n') {
2147 printf("(\\n)");
2148 } else if(c == '\r') {
2149 printf("(\\r)");
2150 } else if(c == 0x1b) {
2151 printf("(\\e)");
2152 } else {
2153 printf("(%02x)", c);
2154 }
2155 }
2156 printf("ESC\\\n");
2157 }
2158
2159 void
2160 strreset(void) {
2161 memset(&strescseq, 0, sizeof(strescseq));
2162 }
2163
2164 void
2165 tputtab(bool forward) {
2166 uint x = term.c.x;
2167
2168 if(forward) {
2169 if(x == term.col)
2170 return;
2171 for(++x; x < term.col && !term.tabs[x]; ++x)
2172 /* nothing */ ;
2173 } else {
2174 if(x == 0)
2175 return;
2176 for(--x; x > 0 && !term.tabs[x]; --x)
2177 /* nothing */ ;
2178 }
2179 tmoveto(x, term.c.y);
2180 }
2181
2182 void
2183 techo(char *buf, int len) {
2184 for(; len > 0; buf++, len--) {
2185 char c = *buf;
2186
2187 if(c == '\033') { /* escape */
2188 tputc("^", 1);
2189 tputc("[", 1);
2190 } else if(c < '\x20') { /* control code */
2191 if(c != '\n' && c != '\r' && c != '\t') {
2192 c |= '\x40';
2193 tputc("^", 1);
2194 }
2195 tputc(&c, 1);
2196 } else {
2197 break;
2198 }
2199 }
2200 if(len)
2201 tputc(buf, len);
2202 }
2203
2204 void
2205 tputc(char *c, int len) {
2206 uchar ascii = *c;
2207 bool control = ascii < '\x20' || ascii == 0177;
2208
2209 if(iofd != -1) {
2210 if(xwrite(iofd, c, len) < 0) {
2211 fprintf(stderr, "Error writing in %s:%s\n",
2212 opt_io, strerror(errno));
2213 close(iofd);
2214 iofd = -1;
2215 }
2216 }
2217
2218 /*
2219 * STR sequences must be checked before anything else
2220 * because it can use some control codes as part of the sequence.
2221 */
2222 if(term.esc & ESC_STR) {
2223 switch(ascii) {
2224 case '\033':
2225 term.esc = ESC_START | ESC_STR_END;
2226 break;
2227 case '\a': /* backwards compatibility to xterm */
2228 term.esc = 0;
2229 strhandle();
2230 break;
2231 default:
2232 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2233 memmove(&strescseq.buf[strescseq.len], c, len);
2234 strescseq.len += len;
2235 } else {
2236 /*
2237 * Here is a bug in terminals. If the user never sends
2238 * some code to stop the str or esc command, then st
2239 * will stop responding. But this is better than
2240 * silently failing with unknown characters. At least
2241 * then users will report back.
2242 *
2243 * In the case users ever get fixed, here is the code:
2244 */
2245 /*
2246 * term.esc = 0;
2247 * strhandle();
2248 */
2249 }
2250 }
2251 return;
2252 }
2253
2254 /*
2255 * Actions of control codes must be performed as soon they arrive
2256 * because they can be embedded inside a control sequence, and
2257 * they must not cause conflicts with sequences.
2258 */
2259 if(control) {
2260 switch(ascii) {
2261 case '\t': /* HT */
2262 tputtab(1);
2263 return;
2264 case '\b': /* BS */
2265 tmoveto(term.c.x-1, term.c.y);
2266 return;
2267 case '\r': /* CR */
2268 tmoveto(0, term.c.y);
2269 return;
2270 case '\f': /* LF */
2271 case '\v': /* VT */
2272 case '\n': /* LF */
2273 /* go to first col if the mode is set */
2274 tnewline(IS_SET(MODE_CRLF));
2275 return;
2276 case '\a': /* BEL */
2277 if(!(xw.state & WIN_FOCUSED))
2278 xseturgency(1);
2279 return;
2280 case '\033': /* ESC */
2281 csireset();
2282 term.esc = ESC_START;
2283 return;
2284 case '\016': /* SO */
2285 case '\017': /* SI */
2286 /*
2287 * Different charsets are hard to handle. Applications
2288 * should use the right alt charset escapes for the
2289 * only reason they still exist: line drawing. The
2290 * rest is incompatible history st should not support.
2291 */
2292 return;
2293 case '\032': /* SUB */
2294 case '\030': /* CAN */
2295 csireset();
2296 return;
2297 case '\005': /* ENQ (IGNORED) */
2298 case '\000': /* NUL (IGNORED) */
2299 case '\021': /* XON (IGNORED) */
2300 case '\023': /* XOFF (IGNORED) */
2301 case 0177: /* DEL (IGNORED) */
2302 return;
2303 }
2304 } else if(term.esc & ESC_START) {
2305 if(term.esc & ESC_CSI) {
2306 csiescseq.buf[csiescseq.len++] = ascii;
2307 if(BETWEEN(ascii, 0x40, 0x7E)
2308 || csiescseq.len >= \
2309 sizeof(csiescseq.buf)-1) {
2310 term.esc = 0;
2311 csiparse();
2312 csihandle();
2313 }
2314 } else if(term.esc & ESC_STR_END) {
2315 term.esc = 0;
2316 if(ascii == '\\')
2317 strhandle();
2318 } else if(term.esc & ESC_ALTCHARSET) {
2319 switch(ascii) {
2320 case '0': /* Line drawing set */
2321 term.c.attr.mode |= ATTR_GFX;
2322 break;
2323 case 'B': /* USASCII */
2324 term.c.attr.mode &= ~ATTR_GFX;
2325 break;
2326 case 'A': /* UK (IGNORED) */
2327 case '<': /* multinational charset (IGNORED) */
2328 case '5': /* Finnish (IGNORED) */
2329 case 'C': /* Finnish (IGNORED) */
2330 case 'K': /* German (IGNORED) */
2331 break;
2332 default:
2333 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2334 }
2335 term.esc = 0;
2336 } else if(term.esc & ESC_TEST) {
2337 if(ascii == '8') { /* DEC screen alignment test. */
2338 char E[UTF_SIZ] = "E";
2339 int x, y;
2340
2341 for(x = 0; x < term.col; ++x) {
2342 for(y = 0; y < term.row; ++y)
2343 tsetchar(E, &term.c.attr, x, y);
2344 }
2345 }
2346 term.esc = 0;
2347 } else {
2348 switch(ascii) {
2349 case '[':
2350 term.esc |= ESC_CSI;
2351 break;
2352 case '#':
2353 term.esc |= ESC_TEST;
2354 break;
2355 case 'P': /* DCS -- Device Control String */
2356 case '_': /* APC -- Application Program Command */
2357 case '^': /* PM -- Privacy Message */
2358 case ']': /* OSC -- Operating System Command */
2359 case 'k': /* old title set compatibility */
2360 strreset();
2361 strescseq.type = ascii;
2362 term.esc |= ESC_STR;
2363 break;
2364 case '(': /* set primary charset G0 */
2365 term.esc |= ESC_ALTCHARSET;
2366 break;
2367 case ')': /* set secondary charset G1 (IGNORED) */
2368 case '*': /* set tertiary charset G2 (IGNORED) */
2369 case '+': /* set quaternary charset G3 (IGNORED) */
2370 term.esc = 0;
2371 break;
2372 case 'D': /* IND -- Linefeed */
2373 if(term.c.y == term.bot) {
2374 tscrollup(term.top, 1);
2375 } else {
2376 tmoveto(term.c.x, term.c.y+1);
2377 }
2378 term.esc = 0;
2379 break;
2380 case 'E': /* NEL -- Next line */
2381 tnewline(1); /* always go to first col */
2382 term.esc = 0;
2383 break;
2384 case 'H': /* HTS -- Horizontal tab stop */
2385 term.tabs[term.c.x] = 1;
2386 term.esc = 0;
2387 break;
2388 case 'M': /* RI -- Reverse index */
2389 if(term.c.y == term.top) {
2390 tscrolldown(term.top, 1);
2391 } else {
2392 tmoveto(term.c.x, term.c.y-1);
2393 }
2394 term.esc = 0;
2395 break;
2396 case 'Z': /* DECID -- Identify Terminal */
2397 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2398 term.esc = 0;
2399 break;
2400 case 'c': /* RIS -- Reset to inital state */
2401 treset();
2402 term.esc = 0;
2403 xresettitle();
2404 break;
2405 case '=': /* DECPAM -- Application keypad */
2406 term.mode |= MODE_APPKEYPAD;
2407 term.esc = 0;
2408 break;
2409 case '>': /* DECPNM -- Normal keypad */
2410 term.mode &= ~MODE_APPKEYPAD;
2411 term.esc = 0;
2412 break;
2413 case '7': /* DECSC -- Save Cursor */
2414 tcursor(CURSOR_SAVE);
2415 term.esc = 0;
2416 break;
2417 case '8': /* DECRC -- Restore Cursor */
2418 tcursor(CURSOR_LOAD);
2419 term.esc = 0;
2420 break;
2421 case '\\': /* ST -- Stop */
2422 term.esc = 0;
2423 break;
2424 default:
2425 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2426 (uchar) ascii, isprint(ascii)? ascii:'.');
2427 term.esc = 0;
2428 }
2429 }
2430 /*
2431 * All characters which form part of a sequence are not
2432 * printed
2433 */
2434 return;
2435 }
2436 /*
2437 * Display control codes only if we are in graphic mode
2438 */
2439 if(control && !(term.c.attr.mode & ATTR_GFX))
2440 return;
2441 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2442 selclear(NULL);
2443 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2444 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2445 tnewline(1);
2446 }
2447
2448 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2449 memmove(&term.line[term.c.y][term.c.x+1],
2450 &term.line[term.c.y][term.c.x],
2451 (term.col - term.c.x - 1) * sizeof(Glyph));
2452 }
2453
2454 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2455 if(term.c.x+1 < term.col) {
2456 tmoveto(term.c.x+1, term.c.y);
2457 } else {
2458 term.c.state |= CURSOR_WRAPNEXT;
2459 }
2460 }
2461
2462 int
2463 tresize(int col, int row) {
2464 int i;
2465 int minrow = MIN(row, term.row);
2466 int mincol = MIN(col, term.col);
2467 int slide = term.c.y - row + 1;
2468 bool *bp;
2469 Line *orig;
2470
2471 if(col < 1 || row < 1)
2472 return 0;
2473
2474 /* free unneeded rows */
2475 i = 0;
2476 if(slide > 0) {
2477 /*
2478 * slide screen to keep cursor where we expect it -
2479 * tscrollup would work here, but we can optimize to
2480 * memmove because we're freeing the earlier lines
2481 */
2482 for(/* i = 0 */; i < slide; i++) {
2483 free(term.line[i]);
2484 free(term.alt[i]);
2485 }
2486 memmove(term.line, term.line + slide, row * sizeof(Line));
2487 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2488 }
2489 for(i += row; i < term.row; i++) {
2490 free(term.line[i]);
2491 free(term.alt[i]);
2492 }
2493
2494 /* resize to new height */
2495 term.line = xrealloc(term.line, row * sizeof(Line));
2496 term.alt = xrealloc(term.alt, row * sizeof(Line));
2497 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2498 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2499
2500 /* resize each row to new width, zero-pad if needed */
2501 for(i = 0; i < minrow; i++) {
2502 term.dirty[i] = 1;
2503 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2504 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2505 }
2506
2507 /* allocate any new rows */
2508 for(/* i == minrow */; i < row; i++) {
2509 term.dirty[i] = 1;
2510 term.line[i] = xcalloc(col, sizeof(Glyph));
2511 term.alt [i] = xcalloc(col, sizeof(Glyph));
2512 }
2513 if(col > term.col) {
2514 bp = term.tabs + term.col;
2515
2516 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2517 while(--bp > term.tabs && !*bp)
2518 /* nothing */ ;
2519 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2520 *bp = 1;
2521 }
2522 /* update terminal size */
2523 term.col = col;
2524 term.row = row;
2525 /* reset scrolling region */
2526 tsetscroll(0, row-1);
2527 /* make use of the LIMIT in tmoveto */
2528 tmoveto(term.c.x, term.c.y);
2529 /* Clearing both screens */
2530 orig = term.line;
2531 do {
2532 if(mincol < col && 0 < minrow) {
2533 tclearregion(mincol, 0, col - 1, minrow - 1);
2534 }
2535 if(0 < col && minrow < row) {
2536 tclearregion(0, minrow, col - 1, row - 1);
2537 }
2538 tswapscreen();
2539 } while(orig != term.line);
2540
2541 return (slide > 0);
2542 }
2543
2544 void
2545 xresize(int col, int row) {
2546 xw.tw = MAX(1, col * xw.cw);
2547 xw.th = MAX(1, row * xw.ch);
2548
2549 XFreePixmap(xw.dpy, xw.buf);
2550 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2551 DefaultDepth(xw.dpy, xw.scr));
2552 XftDrawChange(xw.draw, xw.buf);
2553 xclear(0, 0, xw.w, xw.h);
2554 }
2555
2556 static inline ushort
2557 sixd_to_16bit(int x) {
2558 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2559 }
2560
2561 void
2562 xloadcols(void) {
2563 int i, r, g, b;
2564 XRenderColor color = { .alpha = 0xffff };
2565
2566 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2567 for(i = 0; i < LEN(colorname); i++) {
2568 if(!colorname[i])
2569 continue;
2570 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2571 die("Could not allocate color '%s'\n", colorname[i]);
2572 }
2573 }
2574
2575 /* load colors [16-255] ; same colors as xterm */
2576 for(i = 16, r = 0; r < 6; r++) {
2577 for(g = 0; g < 6; g++) {
2578 for(b = 0; b < 6; b++) {
2579 color.red = sixd_to_16bit(r);
2580 color.green = sixd_to_16bit(g);
2581 color.blue = sixd_to_16bit(b);
2582 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2583 die("Could not allocate color %d\n", i);
2584 }
2585 i++;
2586 }
2587 }
2588 }
2589
2590 for(r = 0; r < 24; r++, i++) {
2591 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2592 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2593 &dc.col[i])) {
2594 die("Could not allocate color %d\n", i);
2595 }
2596 }
2597 }
2598
2599 int
2600 xsetcolorname(int x, const char *name) {
2601 XRenderColor color = { .alpha = 0xffff };
2602 Colour colour;
2603 if (x < 0 || x > LEN(colorname))
2604 return -1;
2605 if(!name) {
2606 if(16 <= x && x < 16 + 216) {
2607 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2608 color.red = sixd_to_16bit(r);
2609 color.green = sixd_to_16bit(g);
2610 color.blue = sixd_to_16bit(b);
2611 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2612 return 0; /* something went wrong */
2613 dc.col[x] = colour;
2614 return 1;
2615 } else if (16 + 216 <= x && x < 256) {
2616 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2617 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2618 return 0; /* something went wrong */
2619 dc.col[x] = colour;
2620 return 1;
2621 } else {
2622 name = colorname[x];
2623 }
2624 }
2625 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2626 return 0;
2627 dc.col[x] = colour;
2628 return 1;
2629 }
2630
2631 void
2632 xtermclear(int col1, int row1, int col2, int row2) {
2633 XftDrawRect(xw.draw,
2634 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2635 borderpx + col1 * xw.cw,
2636 borderpx + row1 * xw.ch,
2637 (col2-col1+1) * xw.cw,
2638 (row2-row1+1) * xw.ch);
2639 }
2640
2641 /*
2642 * Absolute coordinates.
2643 */
2644 void
2645 xclear(int x1, int y1, int x2, int y2) {
2646 XftDrawRect(xw.draw,
2647 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2648 x1, y1, x2-x1, y2-y1);
2649 }
2650
2651 void
2652 xhints(void) {
2653 XClassHint class = {opt_class ? opt_class : termname, termname};
2654 XWMHints wm = {.flags = InputHint, .input = 1};
2655 XSizeHints *sizeh = NULL;
2656
2657 sizeh = XAllocSizeHints();
2658 if(xw.isfixed == False) {
2659 sizeh->flags = PSize | PResizeInc | PBaseSize;
2660 sizeh->height = xw.h;
2661 sizeh->width = xw.w;
2662 sizeh->height_inc = xw.ch;
2663 sizeh->width_inc = xw.cw;
2664 sizeh->base_height = 2 * borderpx;
2665 sizeh->base_width = 2 * borderpx;
2666 } else {
2667 sizeh->flags = PMaxSize | PMinSize;
2668 sizeh->min_width = sizeh->max_width = xw.fw;
2669 sizeh->min_height = sizeh->max_height = xw.fh;
2670 }
2671
2672 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2673 XFree(sizeh);
2674 }
2675
2676 int
2677 xloadfont(Font *f, FcPattern *pattern) {
2678 FcPattern *match;
2679 FcResult result;
2680
2681 match = FcFontMatch(NULL, pattern, &result);
2682 if(!match)
2683 return 1;
2684
2685 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2686 FcPatternDestroy(match);
2687 return 1;
2688 }
2689
2690 f->set = NULL;
2691 f->pattern = FcPatternDuplicate(pattern);
2692
2693 f->ascent = f->match->ascent;
2694 f->descent = f->match->descent;
2695 f->lbearing = 0;
2696 f->rbearing = f->match->max_advance_width;
2697
2698 f->height = f->ascent + f->descent;
2699 f->width = f->lbearing + f->rbearing;
2700
2701 return 0;
2702 }
2703
2704 void
2705 xloadfonts(char *fontstr, int fontsize) {
2706 FcPattern *pattern;
2707 FcResult result;
2708 double fontval;
2709
2710 if(fontstr[0] == '-') {
2711 pattern = XftXlfdParse(fontstr, False, False);
2712 } else {
2713 pattern = FcNameParse((FcChar8 *)fontstr);
2714 }
2715
2716 if(!pattern)
2717 die("st: can't open font %s\n", fontstr);
2718
2719 if(fontsize > 0) {
2720 FcPatternDel(pattern, FC_PIXEL_SIZE);
2721 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2722 usedfontsize = fontsize;
2723 } else {
2724 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2725 if(result == FcResultMatch) {
2726 usedfontsize = (int)fontval;
2727 } else {
2728 /*
2729 * Default font size is 12, if none given. This is to
2730 * have a known usedfontsize value.
2731 */
2732 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2733 usedfontsize = 12;
2734 }
2735 }
2736
2737 FcConfigSubstitute(0, pattern, FcMatchPattern);
2738 FcDefaultSubstitute(pattern);
2739
2740 if(xloadfont(&dc.font, pattern))
2741 die("st: can't open font %s\n", fontstr);
2742
2743 /* Setting character width and height. */
2744 xw.cw = dc.font.width;
2745 xw.ch = dc.font.height;
2746
2747 FcPatternDel(pattern, FC_SLANT);
2748 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2749 if(xloadfont(&dc.ifont, pattern))
2750 die("st: can't open font %s\n", fontstr);
2751
2752 FcPatternDel(pattern, FC_WEIGHT);
2753 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2754 if(xloadfont(&dc.ibfont, pattern))
2755 die("st: can't open font %s\n", fontstr);
2756
2757 FcPatternDel(pattern, FC_SLANT);
2758 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2759 if(xloadfont(&dc.bfont, pattern))
2760 die("st: can't open font %s\n", fontstr);
2761
2762 FcPatternDestroy(pattern);
2763 }
2764
2765 int
2766 xloadfontset(Font *f) {
2767 FcResult result;
2768
2769 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2770 return 1;
2771 return 0;
2772 }
2773
2774 void
2775 xunloadfont(Font *f) {
2776 XftFontClose(xw.dpy, f->match);
2777 FcPatternDestroy(f->pattern);
2778 if(f->set)
2779 FcFontSetDestroy(f->set);
2780 }
2781
2782 void
2783 xunloadfonts(void) {
2784 int i, ip;
2785
2786 /*
2787 * Free the loaded fonts in the font cache. This is done backwards
2788 * from the frccur.
2789 */
2790 for(i = 0, ip = frccur; i < frclen; i++, ip--) {
2791 if(ip < 0)
2792 ip = LEN(frc) - 1;
2793 XftFontClose(xw.dpy, frc[ip].font);
2794 }
2795 frccur = -1;
2796 frclen = 0;
2797
2798 xunloadfont(&dc.font);
2799 xunloadfont(&dc.bfont);
2800 xunloadfont(&dc.ifont);
2801 xunloadfont(&dc.ibfont);
2802 }
2803
2804 void
2805 xzoom(const Arg *arg) {
2806 xunloadfonts();
2807 xloadfonts(usedfont, usedfontsize + arg->i);
2808 cresize(0, 0);
2809 redraw(0);
2810 }
2811
2812 void
2813 xinit(void) {
2814 XGCValues gcvalues;
2815 Cursor cursor;
2816 Window parent;
2817 int sw, sh;
2818
2819 if(!(xw.dpy = XOpenDisplay(NULL)))
2820 die("Can't open display\n");
2821 xw.scr = XDefaultScreen(xw.dpy);
2822 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2823
2824 /* font */
2825 if(!FcInit())
2826 die("Could not init fontconfig.\n");
2827
2828 usedfont = (opt_font == NULL)? font : opt_font;
2829 xloadfonts(usedfont, 0);
2830
2831 /* colors */
2832 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2833 xloadcols();
2834
2835 /* adjust fixed window geometry */
2836 if(xw.isfixed) {
2837 sw = DisplayWidth(xw.dpy, xw.scr);
2838 sh = DisplayHeight(xw.dpy, xw.scr);
2839 if(xw.fx < 0)
2840 xw.fx = sw + xw.fx - xw.fw - 1;
2841 if(xw.fy < 0)
2842 xw.fy = sh + xw.fy - xw.fh - 1;
2843
2844 xw.h = xw.fh;
2845 xw.w = xw.fw;
2846 } else {
2847 /* window - default size */
2848 xw.h = 2 * borderpx + term.row * xw.ch;
2849 xw.w = 2 * borderpx + term.col * xw.cw;
2850 xw.fx = 0;
2851 xw.fy = 0;
2852 }
2853
2854 /* Events */
2855 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
2856 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
2857 xw.attrs.bit_gravity = NorthWestGravity;
2858 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
2859 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2860 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2861 xw.attrs.colormap = xw.cmap;
2862
2863 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2864 XRootWindow(xw.dpy, xw.scr);
2865 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2866 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2867 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
2868 | CWEventMask | CWColormap, &xw.attrs);
2869
2870 memset(&gcvalues, 0, sizeof(gcvalues));
2871 gcvalues.graphics_exposures = False;
2872 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2873 &gcvalues);
2874 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2875 DefaultDepth(xw.dpy, xw.scr));
2876 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2877 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2878
2879 /* Xft rendering context */
2880 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2881
2882 /* input methods */
2883 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2884 XSetLocaleModifiers("@im=local");
2885 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2886 XSetLocaleModifiers("@im=");
2887 if((xw.xim = XOpenIM(xw.dpy,
2888 NULL, NULL, NULL)) == NULL) {
2889 die("XOpenIM failed. Could not open input"
2890 " device.\n");
2891 }
2892 }
2893 }
2894 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2895 | XIMStatusNothing, XNClientWindow, xw.win,
2896 XNFocusWindow, xw.win, NULL);
2897 if(xw.xic == NULL)
2898 die("XCreateIC failed. Could not obtain input method.\n");
2899
2900 /* white cursor, black outline */
2901 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2902 XDefineCursor(xw.dpy, xw.win, cursor);
2903 XRecolorCursor(xw.dpy, cursor,
2904 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2905 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2906
2907 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2908 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2909 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2910
2911 xresettitle();
2912 XMapWindow(xw.dpy, xw.win);
2913 xhints();
2914 XSync(xw.dpy, 0);
2915 }
2916
2917 void
2918 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2919 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2920 width = charlen * xw.cw, xp, i;
2921 int frp, frcflags;
2922 int u8fl, u8fblen, u8cblen, doesexist;
2923 char *u8c, *u8fs;
2924 long u8char;
2925 Font *font = &dc.font;
2926 FcResult fcres;
2927 FcPattern *fcpattern, *fontpattern;
2928 FcFontSet *fcsets[] = { NULL };
2929 FcCharSet *fccharset;
2930 Colour *fg, *bg, *temp, revfg, revbg;
2931 XRenderColor colfg, colbg;
2932 Rectangle r;
2933
2934 frcflags = FRC_NORMAL;
2935
2936 if(base.mode & ATTR_ITALIC) {
2937 if(base.fg == defaultfg)
2938 base.fg = defaultitalic;
2939 font = &dc.ifont;
2940 frcflags = FRC_ITALIC;
2941 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2942 if(base.fg == defaultfg)
2943 base.fg = defaultitalic;
2944 font = &dc.ibfont;
2945 frcflags = FRC_ITALICBOLD;
2946 } else if(base.mode & ATTR_UNDERLINE) {
2947 if(base.fg == defaultfg)
2948 base.fg = defaultunderline;
2949 }
2950 fg = &dc.col[base.fg];
2951 bg = &dc.col[base.bg];
2952
2953 if(base.mode & ATTR_BOLD) {
2954 if(BETWEEN(base.fg, 0, 7)) {
2955 /* basic system colors */
2956 fg = &dc.col[base.fg + 8];
2957 } else if(BETWEEN(base.fg, 16, 195)) {
2958 /* 256 colors */
2959 fg = &dc.col[base.fg + 36];
2960 } else if(BETWEEN(base.fg, 232, 251)) {
2961 /* greyscale */
2962 fg = &dc.col[base.fg + 4];
2963 }
2964 /*
2965 * Those ranges will not be brightened:
2966 * 8 - 15 – bright system colors
2967 * 196 - 231 – highest 256 color cube
2968 * 252 - 255 – brightest colors in greyscale
2969 */
2970 font = &dc.bfont;
2971 frcflags = FRC_BOLD;
2972 }
2973
2974 if(IS_SET(MODE_REVERSE)) {
2975 if(fg == &dc.col[defaultfg]) {
2976 fg = &dc.col[defaultbg];
2977 } else {
2978 colfg.red = ~fg->color.red;
2979 colfg.green = ~fg->color.green;
2980 colfg.blue = ~fg->color.blue;
2981 colfg.alpha = fg->color.alpha;
2982 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
2983 fg = &revfg;
2984 }
2985
2986 if(bg == &dc.col[defaultbg]) {
2987 bg = &dc.col[defaultfg];
2988 } else {
2989 colbg.red = ~bg->color.red;
2990 colbg.green = ~bg->color.green;
2991 colbg.blue = ~bg->color.blue;
2992 colbg.alpha = bg->color.alpha;
2993 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
2994 bg = &revbg;
2995 }
2996 }
2997
2998 if(base.mode & ATTR_REVERSE) {
2999 temp = fg;
3000 fg = bg;
3001 bg = temp;
3002 }
3003
3004 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3005 fg = bg;
3006
3007 /* Intelligent cleaning up of the borders. */
3008 if(x == 0) {
3009 xclear(0, (y == 0)? 0 : winy, borderpx,
3010 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3011 }
3012 if(x + charlen >= term.col) {
3013 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3014 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3015 }
3016 if(y == 0)
3017 xclear(winx, 0, winx + width, borderpx);
3018 if(y == term.row-1)
3019 xclear(winx, winy + xw.ch, winx + width, xw.h);
3020
3021 /* Clean up the region we want to draw to. */
3022 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3023
3024 /* Set the clip region because Xft is sometimes dirty. */
3025 r.x = 0;
3026 r.y = 0;
3027 r.height = xw.ch;
3028 r.width = width;
3029 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3030
3031 for(xp = winx; bytelen > 0;) {
3032 /*
3033 * Search for the range in the to be printed string of glyphs
3034 * that are in the main font. Then print that range. If
3035 * some glyph is found that is not in the font, do the
3036 * fallback dance.
3037 */
3038 u8fs = s;
3039 u8fblen = 0;
3040 u8fl = 0;
3041 for(;;) {
3042 u8c = s;
3043 u8cblen = utf8decode(s, &u8char);
3044 s += u8cblen;
3045 bytelen -= u8cblen;
3046
3047 doesexist = XftCharIndex(xw.dpy, font->match, u8char);
3048 if(!doesexist || bytelen <= 0) {
3049 if(bytelen <= 0) {
3050 if(doesexist) {
3051 u8fl++;
3052 u8fblen += u8cblen;
3053 }
3054 }
3055
3056 if(u8fl > 0) {
3057 XftDrawStringUtf8(xw.draw, fg,
3058 font->match, xp,
3059 winy + font->ascent,
3060 (FcChar8 *)u8fs,
3061 u8fblen);
3062 xp += font->width * u8fl;
3063
3064 }
3065 break;
3066 }
3067
3068 u8fl++;
3069 u8fblen += u8cblen;
3070 }
3071 if(doesexist)
3072 break;
3073
3074 frp = frccur;
3075 /* Search the font cache. */
3076 for(i = 0; i < frclen; i++, frp--) {
3077 if(frp <= 0)
3078 frp = LEN(frc) - 1;
3079
3080 if(frc[frp].c == u8char
3081 && frc[frp].flags == frcflags) {
3082 break;
3083 }
3084 }
3085
3086 /* Nothing was found. */
3087 if(i >= frclen) {
3088 if(!font->set)
3089 xloadfontset(font);
3090 fcsets[0] = font->set;
3091
3092 /*
3093 * Nothing was found in the cache. Now use
3094 * some dozen of Fontconfig calls to get the
3095 * font for one single character.
3096 */
3097 fcpattern = FcPatternDuplicate(font->pattern);
3098 fccharset = FcCharSetCreate();
3099
3100 FcCharSetAddChar(fccharset, u8char);
3101 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3102 fccharset);
3103 FcPatternAddBool(fcpattern, FC_SCALABLE,
3104 FcTrue);
3105
3106 FcConfigSubstitute(0, fcpattern,
3107 FcMatchPattern);
3108 FcDefaultSubstitute(fcpattern);
3109
3110 fontpattern = FcFontSetMatch(0, fcsets,
3111 FcTrue, fcpattern, &fcres);
3112
3113 /*
3114 * Overwrite or create the new cache entry.
3115 */
3116 frccur++;
3117 frclen++;
3118 if(frccur >= LEN(frc))
3119 frccur = 0;
3120 if(frclen > LEN(frc)) {
3121 frclen = LEN(frc);
3122 XftFontClose(xw.dpy, frc[frccur].font);
3123 }
3124
3125 frc[frccur].font = XftFontOpenPattern(xw.dpy,
3126 fontpattern);
3127 frc[frccur].c = u8char;
3128 frc[frccur].flags = frcflags;
3129
3130 FcPatternDestroy(fcpattern);
3131 FcCharSetDestroy(fccharset);
3132
3133 frp = frccur;
3134 }
3135
3136 XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
3137 xp, winy + frc[frp].font->ascent,
3138 (FcChar8 *)u8c, u8cblen);
3139
3140 xp += font->width;
3141 }
3142
3143 /*
3144 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3145 winy + font->ascent, (FcChar8 *)s, bytelen);
3146 */
3147
3148 if(base.mode & ATTR_UNDERLINE) {
3149 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3150 width, 1);
3151 }
3152
3153 /* Reset clip to none. */
3154 XftDrawSetClip(xw.draw, 0);
3155 }
3156
3157 void
3158 xdrawcursor(void) {
3159 static int oldx = 0, oldy = 0;
3160 int sl;
3161 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3162
3163 LIMIT(oldx, 0, term.col-1);
3164 LIMIT(oldy, 0, term.row-1);
3165
3166 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3167
3168 /* remove the old cursor */
3169 sl = utf8size(term.line[oldy][oldx].c);
3170 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3171 oldy, 1, sl);
3172
3173 /* draw the new one */
3174 if(!(IS_SET(MODE_HIDE))) {
3175 if(xw.state & WIN_FOCUSED) {
3176 if(IS_SET(MODE_REVERSE)) {
3177 g.mode |= ATTR_REVERSE;
3178 g.fg = defaultcs;
3179 g.bg = defaultfg;
3180 }
3181
3182 sl = utf8size(g.c);
3183 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3184 } else {
3185 XftDrawRect(xw.draw, &dc.col[defaultcs],
3186 borderpx + term.c.x * xw.cw,
3187 borderpx + term.c.y * xw.ch,
3188 xw.cw - 1, 1);
3189 XftDrawRect(xw.draw, &dc.col[defaultcs],
3190 borderpx + term.c.x * xw.cw,
3191 borderpx + term.c.y * xw.ch,
3192 1, xw.ch - 1);
3193 XftDrawRect(xw.draw, &dc.col[defaultcs],
3194 borderpx + (term.c.x + 1) * xw.cw - 1,
3195 borderpx + term.c.y * xw.ch,
3196 1, xw.ch - 1);
3197 XftDrawRect(xw.draw, &dc.col[defaultcs],
3198 borderpx + term.c.x * xw.cw,
3199 borderpx + (term.c.y + 1) * xw.ch - 1,
3200 xw.cw, 1);
3201 }
3202 oldx = term.c.x, oldy = term.c.y;
3203 }
3204 }
3205
3206
3207 void
3208 xsettitle(char *p) {
3209 XTextProperty prop;
3210
3211 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3212 &prop);
3213 XSetWMName(xw.dpy, xw.win, &prop);
3214 }
3215
3216 void
3217 xresettitle(void) {
3218 xsettitle(opt_title ? opt_title : "st");
3219 }
3220
3221 void
3222 redraw(int timeout) {
3223 struct timespec tv = {0, timeout * 1000};
3224
3225 tfulldirt();
3226 draw();
3227
3228 if(timeout > 0) {
3229 nanosleep(&tv, NULL);
3230 XSync(xw.dpy, False); /* necessary for a good tput flash */
3231 }
3232 }
3233
3234 void
3235 draw(void) {
3236 drawregion(0, 0, term.col, term.row);
3237 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3238 xw.h, 0, 0);
3239 XSetForeground(xw.dpy, dc.gc,
3240 dc.col[IS_SET(MODE_REVERSE)?
3241 defaultfg : defaultbg].pixel);
3242 }
3243
3244 void
3245 drawregion(int x1, int y1, int x2, int y2) {
3246 int ic, ib, x, y, ox, sl;
3247 Glyph base, new;
3248 char buf[DRAW_BUF_SIZ];
3249 bool ena_sel = sel.ob.x != -1;
3250
3251 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3252 ena_sel = 0;
3253
3254 if(!(xw.state & WIN_VISIBLE))
3255 return;
3256
3257 for(y = y1; y < y2; y++) {
3258 if(!term.dirty[y])
3259 continue;
3260
3261 xtermclear(0, y, term.col, y);
3262 term.dirty[y] = 0;
3263 base = term.line[y][0];
3264 ic = ib = ox = 0;
3265 for(x = x1; x < x2; x++) {
3266 new = term.line[y][x];
3267 if(ena_sel && selected(x, y))
3268 new.mode ^= ATTR_REVERSE;
3269 if(ib > 0 && (ATTRCMP(base, new)
3270 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3271 xdraws(buf, base, ox, y, ic, ib);
3272 ic = ib = 0;
3273 }
3274 if(ib == 0) {
3275 ox = x;
3276 base = new;
3277 }
3278
3279 sl = utf8size(new.c);
3280 memcpy(buf+ib, new.c, sl);
3281 ib += sl;
3282 ++ic;
3283 }
3284 if(ib > 0)
3285 xdraws(buf, base, ox, y, ic, ib);
3286 }
3287 xdrawcursor();
3288 }
3289
3290 void
3291 expose(XEvent *ev) {
3292 XExposeEvent *e = &ev->xexpose;
3293
3294 if(xw.state & WIN_REDRAW) {
3295 if(!e->count)
3296 xw.state &= ~WIN_REDRAW;
3297 }
3298 redraw(0);
3299 }
3300
3301 void
3302 visibility(XEvent *ev) {
3303 XVisibilityEvent *e = &ev->xvisibility;
3304
3305 if(e->state == VisibilityFullyObscured) {
3306 xw.state &= ~WIN_VISIBLE;
3307 } else if(!(xw.state & WIN_VISIBLE)) {
3308 /* need a full redraw for next Expose, not just a buf copy */
3309 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3310 }
3311 }
3312
3313 void
3314 unmap(XEvent *ev) {
3315 xw.state &= ~WIN_VISIBLE;
3316 }
3317
3318 void
3319 xsetpointermotion(int set) {
3320 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3321 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3322 }
3323
3324 void
3325 xseturgency(int add) {
3326 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3327
3328 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3329 XSetWMHints(xw.dpy, xw.win, h);
3330 XFree(h);
3331 }
3332
3333 void
3334 focus(XEvent *ev) {
3335 XFocusChangeEvent *e = &ev->xfocus;
3336
3337 if(e->mode == NotifyGrab)
3338 return;
3339
3340 if(ev->type == FocusIn) {
3341 XSetICFocus(xw.xic);
3342 xw.state |= WIN_FOCUSED;
3343 xseturgency(0);
3344 if(IS_SET(MODE_FOCUS))
3345 ttywrite("\033[I", 3);
3346 } else {
3347 XUnsetICFocus(xw.xic);
3348 xw.state &= ~WIN_FOCUSED;
3349 if(IS_SET(MODE_FOCUS))
3350 ttywrite("\033[O", 3);
3351 }
3352 }
3353
3354 static inline bool
3355 match(uint mask, uint state) {
3356 state &= ~ignoremod;
3357
3358 if(mask == XK_NO_MOD && state)
3359 return false;
3360 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3361 return false;
3362 if(mask == XK_ANY_MOD)
3363 return true;
3364 return state == mask;
3365 }
3366
3367 void
3368 numlock(const Arg *dummy) {
3369 term.numlock ^= 1;
3370 }
3371
3372 char*
3373 kmap(KeySym k, uint state) {
3374 Key *kp;
3375 int i;
3376
3377 /* Check for mapped keys out of X11 function keys. */
3378 for(i = 0; i < LEN(mappedkeys); i++) {
3379 if(mappedkeys[i] == k)
3380 break;
3381 }
3382 if(i == LEN(mappedkeys)) {
3383 if((k & 0xFFFF) < 0xFD00)
3384 return NULL;
3385 }
3386
3387 for(kp = key; kp < key + LEN(key); kp++) {
3388 if(kp->k != k)
3389 continue;
3390
3391 if(!match(kp->mask, state))
3392 continue;
3393
3394 if(kp->appkey > 0) {
3395 if(!IS_SET(MODE_APPKEYPAD))
3396 continue;
3397 if(term.numlock && kp->appkey == 2)
3398 continue;
3399 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3400 continue;
3401 }
3402
3403 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3404 (kp->appcursor > 0
3405 && !IS_SET(MODE_APPCURSOR))) {
3406 continue;
3407 }
3408
3409 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3410 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3411 continue;
3412 }
3413
3414 return kp->s;
3415 }
3416
3417 return NULL;
3418 }
3419
3420 void
3421 kpress(XEvent *ev) {
3422 XKeyEvent *e = &ev->xkey;
3423 KeySym ksym;
3424 char xstr[31], buf[32], *customkey, *cp = buf;
3425 int len, ret;
3426 long c;
3427 Status status;
3428 Shortcut *bp;
3429
3430 if(IS_SET(MODE_KBDLOCK))
3431 return;
3432
3433 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3434 e->state &= ~Mod2Mask;
3435 /* 1. shortcuts */
3436 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3437 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3438 bp->func(&(bp->arg));
3439 return;
3440 }
3441 }
3442
3443 /* 2. custom keys from config.h */
3444 if((customkey = kmap(ksym, e->state))) {
3445 len = strlen(customkey);
3446 memcpy(buf, customkey, len);
3447 /* 3. hardcoded (overrides X lookup) */
3448 } else {
3449 if(len == 0)
3450 return;
3451
3452 if(len == 1 && e->state & Mod1Mask) {
3453 if(IS_SET(MODE_8BIT)) {
3454 if(*xstr < 0177) {
3455 c = *xstr | 0x80;
3456 ret = utf8encode(&c, cp);
3457 cp += ret;
3458 len = 0;
3459 }
3460 } else {
3461 *cp++ = '\033';
3462 }
3463 }
3464
3465 memcpy(cp, xstr, len);
3466 len = cp - buf + len;
3467 }
3468
3469 ttywrite(buf, len);
3470 if(IS_SET(MODE_ECHO))
3471 techo(buf, len);
3472 }
3473
3474
3475 void
3476 cmessage(XEvent *e) {
3477 /*
3478 * See xembed specs
3479 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3480 */
3481 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3482 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3483 xw.state |= WIN_FOCUSED;
3484 xseturgency(0);
3485 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3486 xw.state &= ~WIN_FOCUSED;
3487 }
3488 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3489 /* Send SIGHUP to shell */
3490 kill(pid, SIGHUP);
3491 exit(EXIT_SUCCESS);
3492 }
3493 }
3494
3495 void
3496 cresize(int width, int height) {
3497 int col, row;
3498
3499 if(width != 0)
3500 xw.w = width;
3501 if(height != 0)
3502 xw.h = height;
3503
3504 col = (xw.w - 2 * borderpx) / xw.cw;
3505 row = (xw.h - 2 * borderpx) / xw.ch;
3506
3507 tresize(col, row);
3508 xresize(col, row);
3509 ttyresize();
3510 }
3511
3512 void
3513 resize(XEvent *e) {
3514 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3515 return;
3516
3517 cresize(e->xconfigure.width, e->xconfigure.height);
3518 }
3519
3520 void
3521 run(void) {
3522 XEvent ev;
3523 fd_set rfd;
3524 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3525 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3526
3527 gettimeofday(&lastblink, NULL);
3528 gettimeofday(&last, NULL);
3529
3530 for(xev = actionfps;;) {
3531 FD_ZERO(&rfd);
3532 FD_SET(cmdfd, &rfd);
3533 FD_SET(xfd, &rfd);
3534
3535 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3536 if(errno == EINTR)
3537 continue;
3538 die("select failed: %s\n", SERRNO);
3539 }
3540 if(FD_ISSET(cmdfd, &rfd)) {
3541 ttyread();
3542 if(blinktimeout) {
3543 blinkset = tattrset(ATTR_BLINK);
3544 if(!blinkset && term.mode & ATTR_BLINK)
3545 term.mode &= ~(MODE_BLINK);
3546 }
3547 }
3548
3549 if(FD_ISSET(xfd, &rfd))
3550 xev = actionfps;
3551
3552 gettimeofday(&now, NULL);
3553 drawtimeout.tv_sec = 0;
3554 drawtimeout.tv_usec = (1000/xfps) * 1000;
3555 tv = &drawtimeout;
3556
3557 dodraw = 0;
3558 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3559 tsetdirtattr(ATTR_BLINK);
3560 term.mode ^= MODE_BLINK;
3561 gettimeofday(&lastblink, NULL);
3562 dodraw = 1;
3563 }
3564 if(TIMEDIFF(now, last) \
3565 > (xev? (1000/xfps) : (1000/actionfps))) {
3566 dodraw = 1;
3567 last = now;
3568 }
3569
3570 if(dodraw) {
3571 while(XPending(xw.dpy)) {
3572 XNextEvent(xw.dpy, &ev);
3573 if(XFilterEvent(&ev, None))
3574 continue;
3575 if(handler[ev.type])
3576 (handler[ev.type])(&ev);
3577 }
3578
3579 draw();
3580 XFlush(xw.dpy);
3581
3582 if(xev && !FD_ISSET(xfd, &rfd))
3583 xev--;
3584 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3585 if(blinkset) {
3586 if(TIMEDIFF(now, lastblink) \
3587 > blinktimeout) {
3588 drawtimeout.tv_usec = 1;
3589 } else {
3590 drawtimeout.tv_usec = (1000 * \
3591 (blinktimeout - \
3592 TIMEDIFF(now,
3593 lastblink)));
3594 }
3595 } else {
3596 tv = NULL;
3597 }
3598 }
3599 }
3600 }
3601 }
3602
3603 void
3604 usage(void) {
3605 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3606 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3607 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3608 }
3609
3610 int
3611 main(int argc, char *argv[]) {
3612 int bitm, xr, yr;
3613 uint wr, hr;
3614 char *titles;
3615
3616 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3617 xw.isfixed = False;
3618
3619 ARGBEGIN {
3620 case 'a':
3621 allowaltscreen = false;
3622 break;
3623 case 'c':
3624 opt_class = EARGF(usage());
3625 break;
3626 case 'e':
3627 /* eat all remaining arguments */
3628 if(argc > 1) {
3629 opt_cmd = &argv[1];
3630 if(argv[1] != NULL && opt_title == NULL) {
3631 titles = strdup(argv[1]);
3632 opt_title = basename(titles);
3633 }
3634 }
3635 goto run;
3636 case 'f':
3637 opt_font = EARGF(usage());
3638 break;
3639 case 'g':
3640 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3641 if(bitm & XValue)
3642 xw.fx = xr;
3643 if(bitm & YValue)
3644 xw.fy = yr;
3645 if(bitm & WidthValue)
3646 xw.fw = (int)wr;
3647 if(bitm & HeightValue)
3648 xw.fh = (int)hr;
3649 if(bitm & XNegative && xw.fx == 0)
3650 xw.fx = -1;
3651 if(bitm & XNegative && xw.fy == 0)
3652 xw.fy = -1;
3653
3654 if(xw.fh != 0 && xw.fw != 0)
3655 xw.isfixed = True;
3656 break;
3657 case 'o':
3658 opt_io = EARGF(usage());
3659 break;
3660 case 't':
3661 opt_title = EARGF(usage());
3662 break;
3663 case 'w':
3664 opt_embed = EARGF(usage());
3665 break;
3666 case 'v':
3667 default:
3668 usage();
3669 } ARGEND;
3670
3671 run:
3672 setlocale(LC_CTYPE, "");
3673 XSetLocaleModifiers("");
3674 tnew(80, 24);
3675 xinit();
3676 ttynew();
3677 selinit();
3678 if(xw.isfixed)
3679 cresize(xw.h, xw.w);
3680 run();
3681
3682 return 0;
3683 }
3684