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Fixed memory leak in xsettitle().
[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 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
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 #define VT102ID "\033[?6c"
89
90 enum glyph_attribute {
91 ATTR_NULL = 0,
92 ATTR_REVERSE = 1,
93 ATTR_UNDERLINE = 2,
94 ATTR_BOLD = 4,
95 ATTR_GFX = 8,
96 ATTR_ITALIC = 16,
97 ATTR_BLINK = 32,
98 ATTR_WRAP = 64,
99 };
100
101 enum cursor_movement {
102 CURSOR_SAVE,
103 CURSOR_LOAD
104 };
105
106 enum cursor_state {
107 CURSOR_DEFAULT = 0,
108 CURSOR_WRAPNEXT = 1,
109 CURSOR_ORIGIN = 2
110 };
111
112 enum term_mode {
113 MODE_WRAP = 1,
114 MODE_INSERT = 2,
115 MODE_APPKEYPAD = 4,
116 MODE_ALTSCREEN = 8,
117 MODE_CRLF = 16,
118 MODE_MOUSEBTN = 32,
119 MODE_MOUSEMOTION = 64,
120 MODE_REVERSE = 128,
121 MODE_KBDLOCK = 256,
122 MODE_HIDE = 512,
123 MODE_ECHO = 1024,
124 MODE_APPCURSOR = 2048,
125 MODE_MOUSESGR = 4096,
126 MODE_8BIT = 8192,
127 MODE_BLINK = 16384,
128 MODE_FBLINK = 32768,
129 MODE_FOCUS = 65536,
130 MODE_MOUSEX10 = 131072,
131 MODE_MOUSEMANY = 262144,
132 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
133 |MODE_MOUSEMANY,
134 };
135
136 enum escape_state {
137 ESC_START = 1,
138 ESC_CSI = 2,
139 ESC_STR = 4, /* DSC, OSC, PM, APC */
140 ESC_ALTCHARSET = 8,
141 ESC_STR_END = 16, /* a final string was encountered */
142 ESC_TEST = 32, /* Enter in test mode */
143 };
144
145 enum window_state {
146 WIN_VISIBLE = 1,
147 WIN_REDRAW = 2,
148 WIN_FOCUSED = 4
149 };
150
151 enum selection_type {
152 SEL_REGULAR = 1,
153 SEL_RECTANGULAR = 2
154 };
155
156 enum selection_snap {
157 SNAP_WORD = 1,
158 SNAP_LINE = 2
159 };
160
161 typedef unsigned char uchar;
162 typedef unsigned int uint;
163 typedef unsigned long ulong;
164 typedef unsigned short ushort;
165
166 typedef struct {
167 char c[UTF_SIZ]; /* character code */
168 uchar mode; /* attribute flags */
169 ulong fg; /* foreground */
170 ulong bg; /* background */
171 } Glyph;
172
173 typedef Glyph *Line;
174
175 typedef struct {
176 Glyph attr; /* current char attributes */
177 int x;
178 int y;
179 char state;
180 } TCursor;
181
182 /* CSI Escape sequence structs */
183 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
184 typedef struct {
185 char buf[ESC_BUF_SIZ]; /* raw string */
186 int len; /* raw string length */
187 char priv;
188 int arg[ESC_ARG_SIZ];
189 int narg; /* nb of args */
190 char mode;
191 } CSIEscape;
192
193 /* STR Escape sequence structs */
194 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
195 typedef struct {
196 char type; /* ESC type ... */
197 char buf[STR_BUF_SIZ]; /* raw string */
198 int len; /* raw string length */
199 char *args[STR_ARG_SIZ];
200 int narg; /* nb of args */
201 } STREscape;
202
203 /* Internal representation of the screen */
204 typedef struct {
205 int row; /* nb row */
206 int col; /* nb col */
207 Line *line; /* screen */
208 Line *alt; /* alternate screen */
209 bool *dirty; /* dirtyness of lines */
210 TCursor c; /* cursor */
211 int top; /* top scroll limit */
212 int bot; /* bottom scroll limit */
213 int mode; /* terminal mode flags */
214 int esc; /* escape state flags */
215 bool numlock; /* lock numbers in keyboard */
216 bool *tabs;
217 } Term;
218
219 /* Purely graphic info */
220 typedef struct {
221 Display *dpy;
222 Colourmap cmap;
223 Window win;
224 Drawable buf;
225 Atom xembed, wmdeletewin;
226 XIM xim;
227 XIC xic;
228 Draw draw;
229 Visual *vis;
230 XSetWindowAttributes attrs;
231 int scr;
232 bool isfixed; /* is fixed geometry? */
233 int fx, fy, fw, fh; /* fixed geometry */
234 int tw, th; /* tty width and height */
235 int w, h; /* window width and height */
236 int ch; /* char height */
237 int cw; /* char width */
238 char state; /* focus, redraw, visible */
239 } XWindow;
240
241 typedef struct {
242 int b;
243 uint mask;
244 char s[ESC_BUF_SIZ];
245 } Mousekey;
246
247 typedef struct {
248 KeySym k;
249 uint mask;
250 char s[ESC_BUF_SIZ];
251 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
252 signed char appkey; /* application keypad */
253 signed char appcursor; /* application cursor */
254 signed char crlf; /* crlf mode */
255 } Key;
256
257 typedef struct {
258 int mode;
259 int type;
260 int snap;
261 /*
262 * Selection variables:
263 * nb – normalized coordinates of the beginning of the selection
264 * ne – normalized coordinates of the end of the selection
265 * ob – original coordinates of the beginning of the selection
266 * oe – original coordinates of the end of the selection
267 */
268 struct {
269 int x, y;
270 } nb, ne, ob, oe;
271
272 char *clip;
273 Atom xtarget;
274 bool alt;
275 struct timeval tclick1;
276 struct timeval tclick2;
277 } Selection;
278
279 typedef union {
280 int i;
281 unsigned int ui;
282 float f;
283 const void *v;
284 } Arg;
285
286 typedef struct {
287 unsigned int mod;
288 KeySym keysym;
289 void (*func)(const Arg *);
290 const Arg arg;
291 } Shortcut;
292
293 /* function definitions used in config.h */
294 static void clippaste(const Arg *);
295 static void numlock(const Arg *);
296 static void selpaste(const Arg *);
297 static void xzoom(const Arg *);
298
299 /* Config.h for applying patches and the configuration. */
300 #include "config.h"
301
302 /* Font structure */
303 typedef struct {
304 int height;
305 int width;
306 int ascent;
307 int descent;
308 short lbearing;
309 short rbearing;
310 XftFont *match;
311 FcFontSet *set;
312 FcPattern *pattern;
313 } Font;
314
315 /* Drawing Context */
316 typedef struct {
317 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
318 Font font, bfont, ifont, ibfont;
319 GC gc;
320 } DC;
321
322 static void die(const char *, ...);
323 static void draw(void);
324 static void redraw(int);
325 static void drawregion(int, int, int, int);
326 static void execsh(void);
327 static void sigchld(int);
328 static void run(void);
329
330 static void csidump(void);
331 static void csihandle(void);
332 static void csiparse(void);
333 static void csireset(void);
334 static void strdump(void);
335 static void strhandle(void);
336 static void strparse(void);
337 static void strreset(void);
338
339 static int tattrset(int);
340 static void tclearregion(int, int, int, int);
341 static void tcursor(int);
342 static void tdeletechar(int);
343 static void tdeleteline(int);
344 static void tinsertblank(int);
345 static void tinsertblankline(int);
346 static void tmoveto(int, int);
347 static void tmoveato(int x, int y);
348 static void tnew(int, int);
349 static void tnewline(int);
350 static void tputtab(bool);
351 static void tputc(char *, int);
352 static void treset(void);
353 static int tresize(int, int);
354 static void tscrollup(int, int);
355 static void tscrolldown(int, int);
356 static void tsetattr(int*, int);
357 static void tsetchar(char *, Glyph *, int, int);
358 static void tsetscroll(int, int);
359 static void tswapscreen(void);
360 static void tsetdirt(int, int);
361 static void tsetdirtattr(int);
362 static void tsetmode(bool, bool, int *, int);
363 static void tfulldirt(void);
364 static void techo(char *, int);
365 static ulong tdefcolor(int *, int *, int);
366 static inline bool match(uint, uint);
367 static void ttynew(void);
368 static void ttyread(void);
369 static void ttyresize(void);
370 static void ttywrite(const char *, size_t);
371
372 static void xdraws(char *, Glyph, int, int, int, int);
373 static void xhints(void);
374 static void xclear(int, int, int, int);
375 static void xdrawcursor(void);
376 static void xinit(void);
377 static void xloadcols(void);
378 static int xsetcolorname(int, const char *);
379 static int xloadfont(Font *, FcPattern *);
380 static void xloadfonts(char *, int);
381 static int xloadfontset(Font *);
382 static void xsettitle(char *);
383 static void xresettitle(void);
384 static void xsetpointermotion(int);
385 static void xseturgency(int);
386 static void xsetsel(char*);
387 static void xtermclear(int, int, int, int);
388 static void xunloadfont(Font *f);
389 static void xunloadfonts(void);
390 static void xresize(int, int);
391
392 static void expose(XEvent *);
393 static void visibility(XEvent *);
394 static void unmap(XEvent *);
395 static char *kmap(KeySym, uint);
396 static void kpress(XEvent *);
397 static void cmessage(XEvent *);
398 static void cresize(int, int);
399 static void resize(XEvent *);
400 static void focus(XEvent *);
401 static void brelease(XEvent *);
402 static void bpress(XEvent *);
403 static void bmotion(XEvent *);
404 static void selnotify(XEvent *);
405 static void selclear(XEvent *);
406 static void selrequest(XEvent *);
407
408 static void selinit(void);
409 static void selsort(void);
410 static inline bool selected(int, int);
411 static void selcopy(void);
412 static void selscroll(int, int);
413 static void selsnap(int, int *, int *, int);
414
415 static int utf8decode(char *, long *);
416 static int utf8encode(long *, char *);
417 static int utf8size(char *);
418 static int isfullutf8(char *, int);
419
420 static ssize_t xwrite(int, char *, size_t);
421 static void *xmalloc(size_t);
422 static void *xrealloc(void *, size_t);
423 static void *xcalloc(size_t, size_t);
424
425 static void (*handler[LASTEvent])(XEvent *) = {
426 [KeyPress] = kpress,
427 [ClientMessage] = cmessage,
428 [ConfigureNotify] = resize,
429 [VisibilityNotify] = visibility,
430 [UnmapNotify] = unmap,
431 [Expose] = expose,
432 [FocusIn] = focus,
433 [FocusOut] = focus,
434 [MotionNotify] = bmotion,
435 [ButtonPress] = bpress,
436 [ButtonRelease] = brelease,
437 [SelectionClear] = selclear,
438 [SelectionNotify] = selnotify,
439 [SelectionRequest] = selrequest,
440 };
441
442 /* Globals */
443 static DC dc;
444 static XWindow xw;
445 static Term term;
446 static CSIEscape csiescseq;
447 static STREscape strescseq;
448 static int cmdfd;
449 static pid_t pid;
450 static Selection sel;
451 static int iofd = -1;
452 static char **opt_cmd = NULL;
453 static char *opt_io = NULL;
454 static char *opt_title = NULL;
455 static char *opt_embed = NULL;
456 static char *opt_class = NULL;
457 static char *opt_font = NULL;
458 static int oldbutton = 3; /* button event on startup: 3 = release */
459
460 static char *usedfont = NULL;
461 static int usedfontsize = 0;
462
463 /* Font Ring Cache */
464 enum {
465 FRC_NORMAL,
466 FRC_ITALIC,
467 FRC_BOLD,
468 FRC_ITALICBOLD
469 };
470
471 typedef struct {
472 XftFont *font;
473 int flags;
474 } Fontcache;
475
476 /* Fontcache is an array now. A new font will be appended to the array. */
477 static Fontcache frc[16];
478 static int frclen = 0;
479
480 ssize_t
481 xwrite(int fd, char *s, size_t len) {
482 size_t aux = len;
483
484 while(len > 0) {
485 ssize_t r = write(fd, s, len);
486 if(r < 0)
487 return r;
488 len -= r;
489 s += r;
490 }
491 return aux;
492 }
493
494 void *
495 xmalloc(size_t len) {
496 void *p = malloc(len);
497
498 if(!p)
499 die("Out of memory\n");
500
501 return p;
502 }
503
504 void *
505 xrealloc(void *p, size_t len) {
506 if((p = realloc(p, len)) == NULL)
507 die("Out of memory\n");
508
509 return p;
510 }
511
512 void *
513 xcalloc(size_t nmemb, size_t size) {
514 void *p = calloc(nmemb, size);
515
516 if(!p)
517 die("Out of memory\n");
518
519 return p;
520 }
521
522 int
523 utf8decode(char *s, long *u) {
524 uchar c;
525 int i, n, rtn;
526
527 rtn = 1;
528 c = *s;
529 if(~c & 0x80) { /* 0xxxxxxx */
530 *u = c;
531 return rtn;
532 } else if((c & 0xE0) == 0xC0) { /* 110xxxxx */
533 *u = c & 0x1F;
534 n = 1;
535 } else if((c & 0xF0) == 0xE0) { /* 1110xxxx */
536 *u = c & 0x0F;
537 n = 2;
538 } else if((c & 0xF8) == 0xF0) { /* 11110xxx */
539 *u = c & 0x07;
540 n = 3;
541 } else {
542 goto invalid;
543 }
544
545 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
546 c = *s;
547 if((c & 0xC0) != 0x80) /* 10xxxxxx */
548 goto invalid;
549 *u <<= 6;
550 *u |= c & 0x3F;
551 }
552
553 if((n == 1 && *u < 0x80) ||
554 (n == 2 && *u < 0x800) ||
555 (n == 3 && *u < 0x10000) ||
556 (*u >= 0xD800 && *u <= 0xDFFF)) {
557 goto invalid;
558 }
559
560 return rtn;
561 invalid:
562 *u = 0xFFFD;
563
564 return rtn;
565 }
566
567 int
568 utf8encode(long *u, char *s) {
569 uchar *sp;
570 ulong uc;
571 int i, n;
572
573 sp = (uchar *)s;
574 uc = *u;
575 if(uc < 0x80) {
576 *sp = uc; /* 0xxxxxxx */
577 return 1;
578 } else if(*u < 0x800) {
579 *sp = (uc >> 6) | 0xC0; /* 110xxxxx */
580 n = 1;
581 } else if(uc < 0x10000) {
582 *sp = (uc >> 12) | 0xE0; /* 1110xxxx */
583 n = 2;
584 } else if(uc <= 0x10FFFF) {
585 *sp = (uc >> 18) | 0xF0; /* 11110xxx */
586 n = 3;
587 } else {
588 goto invalid;
589 }
590
591 for(i=n,++sp; i>0; --i,++sp)
592 *sp = ((uc >> 6*(i-1)) & 0x3F) | 0x80; /* 10xxxxxx */
593
594 return n+1;
595 invalid:
596 /* U+FFFD */
597 *s++ = '\xEF';
598 *s++ = '\xBF';
599 *s = '\xBD';
600
601 return 3;
602 }
603
604 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
605 UTF-8 otherwise return 0 */
606 int
607 isfullutf8(char *s, int b) {
608 uchar *c1, *c2, *c3;
609
610 c1 = (uchar *)s;
611 c2 = (uchar *)++s;
612 c3 = (uchar *)++s;
613 if(b < 1) {
614 return 0;
615 } else if((*c1 & 0xE0) == 0xC0 && b == 1) {
616 return 0;
617 } else if((*c1 & 0xF0) == 0xE0 &&
618 ((b == 1) ||
619 ((b == 2) && (*c2 & 0xC0) == 0x80))) {
620 return 0;
621 } else if((*c1 & 0xF8) == 0xF0 &&
622 ((b == 1) ||
623 ((b == 2) && (*c2 & 0xC0) == 0x80) ||
624 ((b == 3) && (*c2 & 0xC0) == 0x80 && (*c3 & 0xC0) == 0x80))) {
625 return 0;
626 } else {
627 return 1;
628 }
629 }
630
631 int
632 utf8size(char *s) {
633 uchar c = *s;
634
635 if(~c & 0x80) {
636 return 1;
637 } else if((c & 0xE0) == 0xC0) {
638 return 2;
639 } else if((c & 0xF0) == 0xE0) {
640 return 3;
641 } else {
642 return 4;
643 }
644 }
645
646 static void
647 selinit(void) {
648 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
649 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
650 sel.mode = 0;
651 sel.ob.x = -1;
652 sel.clip = NULL;
653 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
654 if(sel.xtarget == None)
655 sel.xtarget = XA_STRING;
656 }
657
658 static int
659 x2col(int x) {
660 x -= borderpx;
661 x /= xw.cw;
662
663 return LIMIT(x, 0, term.col-1);
664 }
665
666 static int
667 y2row(int y) {
668 y -= borderpx;
669 y /= xw.ch;
670
671 return LIMIT(y, 0, term.row-1);
672 }
673
674 static void
675 selsort(void) {
676 if(sel.ob.y == sel.oe.y) {
677 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
678 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
679 } else {
680 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
681 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
682 }
683 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
684 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
685 }
686
687 static inline bool
688 selected(int x, int y) {
689 if(sel.ne.y == y && sel.nb.y == y)
690 return BETWEEN(x, sel.nb.x, sel.ne.x);
691
692 if(sel.type == SEL_RECTANGULAR) {
693 return ((sel.nb.y <= y && y <= sel.ne.y)
694 && (sel.nb.x <= x && x <= sel.ne.x));
695 }
696
697 return ((sel.nb.y < y && y < sel.ne.y)
698 || (y == sel.ne.y && x <= sel.ne.x))
699 || (y == sel.nb.y && x >= sel.nb.x
700 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
701 }
702
703 void
704 selsnap(int mode, int *x, int *y, int direction) {
705 int i;
706
707 switch(mode) {
708 case SNAP_WORD:
709 /*
710 * Snap around if the word wraps around at the end or
711 * beginning of a line.
712 */
713 for(;;) {
714 if(direction < 0 && *x <= 0) {
715 if(*y > 0 && term.line[*y - 1][term.col-1].mode
716 & ATTR_WRAP) {
717 *y -= 1;
718 *x = term.col-1;
719 } else {
720 break;
721 }
722 }
723 if(direction > 0 && *x >= term.col-1) {
724 if(*y < term.row-1 && term.line[*y][*x].mode
725 & ATTR_WRAP) {
726 *y += 1;
727 *x = 0;
728 } else {
729 break;
730 }
731 }
732
733 if(strchr(worddelimiters,
734 term.line[*y][*x + direction].c[0])) {
735 break;
736 }
737
738 *x += direction;
739 }
740 break;
741 case SNAP_LINE:
742 /*
743 * Snap around if the the previous line or the current one
744 * has set ATTR_WRAP at its end. Then the whole next or
745 * previous line will be selected.
746 */
747 *x = (direction < 0) ? 0 : term.col - 1;
748 if(direction < 0 && *y > 0) {
749 for(; *y > 0; *y += direction) {
750 if(!(term.line[*y-1][term.col-1].mode
751 & ATTR_WRAP)) {
752 break;
753 }
754 }
755 } else if(direction > 0 && *y < term.row-1) {
756 for(; *y < term.row; *y += direction) {
757 if(!(term.line[*y][term.col-1].mode
758 & ATTR_WRAP)) {
759 break;
760 }
761 }
762 }
763 break;
764 default:
765 /*
766 * Select the whole line when the end of line is reached.
767 */
768 if(direction > 0) {
769 i = term.col;
770 while(--i > 0 && term.line[*y][i].c[0] == ' ')
771 /* nothing */;
772 if(i > 0 && i < *x)
773 *x = term.col - 1;
774 }
775 break;
776 }
777 }
778
779 void
780 getbuttoninfo(XEvent *e) {
781 int type;
782 uint state = e->xbutton.state &~Button1Mask;
783
784 sel.alt = IS_SET(MODE_ALTSCREEN);
785
786 sel.oe.x = x2col(e->xbutton.x);
787 sel.oe.y = y2row(e->xbutton.y);
788
789 if(sel.ob.y < sel.oe.y
790 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
791 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
792 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
793 } else {
794 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
795 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
796 }
797 selsort();
798
799 sel.type = SEL_REGULAR;
800 for(type = 1; type < LEN(selmasks); ++type) {
801 if(match(selmasks[type], state)) {
802 sel.type = type;
803 break;
804 }
805 }
806 }
807
808 void
809 mousereport(XEvent *e) {
810 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
811 button = e->xbutton.button, state = e->xbutton.state,
812 len;
813 char buf[40];
814 static int ox, oy;
815
816 /* from urxvt */
817 if(e->xbutton.type == MotionNotify) {
818 if(x == ox && y == oy)
819 return;
820 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
821 return;
822 /* MOUSE_MOTION: no reporting if no button is pressed */
823 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
824 return;
825
826 button = oldbutton + 32;
827 ox = x;
828 oy = y;
829 } else if(!IS_SET(MODE_MOUSESGR)
830 && (e->xbutton.type == ButtonRelease
831 || button == AnyButton)) {
832 button = 3;
833 } else {
834 button -= Button1;
835 if(button >= 3)
836 button += 64 - 3;
837 if(e->xbutton.type == ButtonPress) {
838 oldbutton = button;
839 ox = x;
840 oy = y;
841 }
842 }
843
844 if(!IS_SET(MODE_MOUSEX10)) {
845 button += (state & ShiftMask ? 4 : 0)
846 + (state & Mod4Mask ? 8 : 0)
847 + (state & ControlMask ? 16 : 0);
848 }
849
850 len = 0;
851 if(IS_SET(MODE_MOUSESGR)) {
852 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
853 button, x+1, y+1,
854 e->xbutton.type == ButtonRelease ? 'm' : 'M');
855 } else if(x < 223 && y < 223) {
856 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
857 IS_SET(MODE_MOUSEX10)? button-1 : 32+button,
858 32+x+1, 32+y+1);
859 } else {
860 return;
861 }
862
863 ttywrite(buf, len);
864 }
865
866 void
867 bpress(XEvent *e) {
868 struct timeval now;
869 Mousekey *mk;
870
871 if(IS_SET(MODE_MOUSE)) {
872 mousereport(e);
873 return;
874 }
875
876 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
877 if(e->xbutton.button == mk->b
878 && match(mk->mask, e->xbutton.state)) {
879 ttywrite(mk->s, strlen(mk->s));
880 if(IS_SET(MODE_ECHO))
881 techo(mk->s, strlen(mk->s));
882 return;
883 }
884 }
885
886 if(e->xbutton.button == Button1) {
887 gettimeofday(&now, NULL);
888
889 /* Clear previous selection, logically and visually. */
890 selclear(NULL);
891 sel.mode = 1;
892 sel.type = SEL_REGULAR;
893 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
894 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
895
896 /*
897 * If the user clicks below predefined timeouts specific
898 * snapping behaviour is exposed.
899 */
900 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
901 sel.snap = SNAP_LINE;
902 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
903 sel.snap = SNAP_WORD;
904 } else {
905 sel.snap = 0;
906 }
907 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
908 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
909 selsort();
910
911 /*
912 * Draw selection, unless it's regular and we don't want to
913 * make clicks visible
914 */
915 if(sel.snap != 0) {
916 sel.mode++;
917 tsetdirt(sel.nb.y, sel.ne.y);
918 }
919 sel.tclick2 = sel.tclick1;
920 sel.tclick1 = now;
921 }
922 }
923
924 void
925 selcopy(void) {
926 char *str, *ptr;
927 int x, y, bufsize, size, i, ex;
928 Glyph *gp, *last;
929
930 if(sel.ob.x == -1) {
931 str = NULL;
932 } else {
933 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
934 ptr = str = xmalloc(bufsize);
935
936 /* append every set & selected glyph to the selection */
937 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
938 gp = &term.line[y][0];
939 last = gp + term.col;
940
941 while(--last >= gp && !(selected(last - gp, y) && \
942 strcmp(last->c, " ") != 0))
943 /* nothing */;
944
945 for(x = 0; gp <= last; x++, ++gp) {
946 if(!selected(x, y))
947 continue;
948
949 size = utf8size(gp->c);
950 memcpy(ptr, gp->c, size);
951 ptr += size;
952 }
953
954 /*
955 * Copy and pasting of line endings is inconsistent
956 * in the inconsistent terminal and GUI world.
957 * The best solution seems like to produce '\n' when
958 * something is copied from st and convert '\n' to
959 * '\r', when something to be pasted is received by
960 * st.
961 * FIXME: Fix the computer world.
962 */
963 if(y < sel.ne.y && !((gp-1)->mode & ATTR_WRAP))
964 *ptr++ = '\n';
965
966 /*
967 * If the last selected line expands in the selection
968 * after the visible text '\n' is appended.
969 */
970 if(y == sel.ne.y) {
971 i = term.col;
972 while(--i > 0 && term.line[y][i].c[0] == ' ')
973 /* nothing */;
974 ex = sel.ne.x;
975 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
976 ex = sel.nb.x;
977 if(i < ex)
978 *ptr++ = '\n';
979 }
980 }
981 *ptr = 0;
982 }
983 xsetsel(str);
984 }
985
986 void
987 selnotify(XEvent *e) {
988 ulong nitems, ofs, rem;
989 int format;
990 uchar *data, *last, *repl;
991 Atom type;
992
993 ofs = 0;
994 do {
995 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
996 False, AnyPropertyType, &type, &format,
997 &nitems, &rem, &data)) {
998 fprintf(stderr, "Clipboard allocation failed\n");
999 return;
1000 }
1001
1002 /*
1003 * As seen in selcopy:
1004 * Line endings are inconsistent in the terminal and GUI world
1005 * copy and pasting. When receiving some selection data,
1006 * replace all '\n' with '\r'.
1007 * FIXME: Fix the computer world.
1008 */
1009 repl = data;
1010 last = data + nitems * format / 8;
1011 while((repl = memchr(repl, '\n', last - repl))) {
1012 *repl++ = '\r';
1013 }
1014
1015 ttywrite((const char *)data, nitems * format / 8);
1016 XFree(data);
1017 /* number of 32-bit chunks returned */
1018 ofs += nitems * format / 32;
1019 } while(rem > 0);
1020 }
1021
1022 void
1023 selpaste(const Arg *dummy) {
1024 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1025 xw.win, CurrentTime);
1026 }
1027
1028 void
1029 clippaste(const Arg *dummy) {
1030 Atom clipboard;
1031
1032 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1033 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1034 xw.win, CurrentTime);
1035 }
1036
1037 void
1038 selclear(XEvent *e) {
1039 if(sel.ob.x == -1)
1040 return;
1041 sel.ob.x = -1;
1042 tsetdirt(sel.nb.y, sel.ne.y);
1043 }
1044
1045 void
1046 selrequest(XEvent *e) {
1047 XSelectionRequestEvent *xsre;
1048 XSelectionEvent xev;
1049 Atom xa_targets, string;
1050
1051 xsre = (XSelectionRequestEvent *) e;
1052 xev.type = SelectionNotify;
1053 xev.requestor = xsre->requestor;
1054 xev.selection = xsre->selection;
1055 xev.target = xsre->target;
1056 xev.time = xsre->time;
1057 /* reject */
1058 xev.property = None;
1059
1060 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1061 if(xsre->target == xa_targets) {
1062 /* respond with the supported type */
1063 string = sel.xtarget;
1064 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1065 XA_ATOM, 32, PropModeReplace,
1066 (uchar *) &string, 1);
1067 xev.property = xsre->property;
1068 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1069 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1070 xsre->target, 8, PropModeReplace,
1071 (uchar *) sel.clip, strlen(sel.clip));
1072 xev.property = xsre->property;
1073 }
1074
1075 /* all done, send a notification to the listener */
1076 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1077 fprintf(stderr, "Error sending SelectionNotify event\n");
1078 }
1079
1080 void
1081 xsetsel(char *str) {
1082 /* register the selection for both the clipboard and the primary */
1083 Atom clipboard;
1084
1085 free(sel.clip);
1086 sel.clip = str;
1087
1088 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1089
1090 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1091 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1092 }
1093
1094 void
1095 brelease(XEvent *e) {
1096 if(IS_SET(MODE_MOUSE)) {
1097 mousereport(e);
1098 return;
1099 }
1100
1101 if(e->xbutton.button == Button2) {
1102 selpaste(NULL);
1103 } else if(e->xbutton.button == Button1) {
1104 if(sel.mode < 2) {
1105 selclear(NULL);
1106 } else {
1107 getbuttoninfo(e);
1108 selcopy();
1109 }
1110 sel.mode = 0;
1111 tsetdirt(sel.nb.y, sel.ne.y);
1112 }
1113 }
1114
1115 void
1116 bmotion(XEvent *e) {
1117 int oldey, oldex, oldsby, oldsey;
1118
1119 if(IS_SET(MODE_MOUSE)) {
1120 mousereport(e);
1121 return;
1122 }
1123
1124 if(!sel.mode)
1125 return;
1126
1127 sel.mode++;
1128 oldey = sel.oe.y;
1129 oldex = sel.oe.x;
1130 oldsby = sel.nb.y;
1131 oldsey = sel.ne.y;
1132 getbuttoninfo(e);
1133
1134 if(oldey != sel.oe.y || oldex != sel.oe.x)
1135 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1136 }
1137
1138 void
1139 die(const char *errstr, ...) {
1140 va_list ap;
1141
1142 va_start(ap, errstr);
1143 vfprintf(stderr, errstr, ap);
1144 va_end(ap);
1145 exit(EXIT_FAILURE);
1146 }
1147
1148 void
1149 execsh(void) {
1150 char **args;
1151 char *envshell = getenv("SHELL");
1152 const struct passwd *pass = getpwuid(getuid());
1153 char buf[sizeof(long) * 8 + 1];
1154
1155 unsetenv("COLUMNS");
1156 unsetenv("LINES");
1157 unsetenv("TERMCAP");
1158
1159 if(pass) {
1160 setenv("LOGNAME", pass->pw_name, 1);
1161 setenv("USER", pass->pw_name, 1);
1162 setenv("SHELL", pass->pw_shell, 0);
1163 setenv("HOME", pass->pw_dir, 0);
1164 }
1165
1166 snprintf(buf, sizeof(buf), "%lu", xw.win);
1167 setenv("WINDOWID", buf, 1);
1168
1169 signal(SIGCHLD, SIG_DFL);
1170 signal(SIGHUP, SIG_DFL);
1171 signal(SIGINT, SIG_DFL);
1172 signal(SIGQUIT, SIG_DFL);
1173 signal(SIGTERM, SIG_DFL);
1174 signal(SIGALRM, SIG_DFL);
1175
1176 DEFAULT(envshell, shell);
1177 setenv("TERM", termname, 1);
1178 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1179 execvp(args[0], args);
1180 exit(EXIT_FAILURE);
1181 }
1182
1183 void
1184 sigchld(int a) {
1185 int stat = 0;
1186
1187 if(waitpid(pid, &stat, 0) < 0)
1188 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1189
1190 if(WIFEXITED(stat)) {
1191 exit(WEXITSTATUS(stat));
1192 } else {
1193 exit(EXIT_FAILURE);
1194 }
1195 }
1196
1197 void
1198 ttynew(void) {
1199 int m, s;
1200 struct winsize w = {term.row, term.col, 0, 0};
1201
1202 /* seems to work fine on linux, openbsd and freebsd */
1203 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1204 die("openpty failed: %s\n", SERRNO);
1205
1206 switch(pid = fork()) {
1207 case -1:
1208 die("fork failed\n");
1209 break;
1210 case 0:
1211 setsid(); /* create a new process group */
1212 dup2(s, STDIN_FILENO);
1213 dup2(s, STDOUT_FILENO);
1214 dup2(s, STDERR_FILENO);
1215 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1216 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1217 close(s);
1218 close(m);
1219 execsh();
1220 break;
1221 default:
1222 close(s);
1223 cmdfd = m;
1224 signal(SIGCHLD, sigchld);
1225 if(opt_io) {
1226 iofd = (!strcmp(opt_io, "-")) ?
1227 STDOUT_FILENO :
1228 open(opt_io, O_WRONLY | O_CREAT, 0666);
1229 if(iofd < 0) {
1230 fprintf(stderr, "Error opening %s:%s\n",
1231 opt_io, strerror(errno));
1232 }
1233 }
1234 }
1235 }
1236
1237 void
1238 dump(char c) {
1239 static int col;
1240
1241 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1242 if(++col % 10 == 0)
1243 fprintf(stderr, "\n");
1244 }
1245
1246 void
1247 ttyread(void) {
1248 static char buf[BUFSIZ];
1249 static int buflen = 0;
1250 char *ptr;
1251 char s[UTF_SIZ];
1252 int charsize; /* size of utf8 char in bytes */
1253 long utf8c;
1254 int ret;
1255
1256 /* append read bytes to unprocessed bytes */
1257 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1258 die("Couldn't read from shell: %s\n", SERRNO);
1259
1260 /* process every complete utf8 char */
1261 buflen += ret;
1262 ptr = buf;
1263 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1264 charsize = utf8decode(ptr, &utf8c);
1265 utf8encode(&utf8c, s);
1266 tputc(s, charsize);
1267 ptr += charsize;
1268 buflen -= charsize;
1269 }
1270
1271 /* keep any uncomplete utf8 char for the next call */
1272 memmove(buf, ptr, buflen);
1273 }
1274
1275 void
1276 ttywrite(const char *s, size_t n) {
1277 if(write(cmdfd, s, n) == -1)
1278 die("write error on tty: %s\n", SERRNO);
1279 }
1280
1281 void
1282 ttyresize(void) {
1283 struct winsize w;
1284
1285 w.ws_row = term.row;
1286 w.ws_col = term.col;
1287 w.ws_xpixel = xw.tw;
1288 w.ws_ypixel = xw.th;
1289 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1290 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1291 }
1292
1293 int
1294 tattrset(int attr) {
1295 int i, j;
1296
1297 for(i = 0; i < term.row-1; i++) {
1298 for(j = 0; j < term.col-1; j++) {
1299 if(term.line[i][j].mode & attr)
1300 return 1;
1301 }
1302 }
1303
1304 return 0;
1305 }
1306
1307 void
1308 tsetdirt(int top, int bot) {
1309 int i;
1310
1311 LIMIT(top, 0, term.row-1);
1312 LIMIT(bot, 0, term.row-1);
1313
1314 for(i = top; i <= bot; i++)
1315 term.dirty[i] = 1;
1316 }
1317
1318 void
1319 tsetdirtattr(int attr) {
1320 int i, j;
1321
1322 for(i = 0; i < term.row-1; i++) {
1323 for(j = 0; j < term.col-1; j++) {
1324 if(term.line[i][j].mode & attr) {
1325 tsetdirt(i, i);
1326 break;
1327 }
1328 }
1329 }
1330 }
1331
1332 void
1333 tfulldirt(void) {
1334 tsetdirt(0, term.row-1);
1335 }
1336
1337 void
1338 tcursor(int mode) {
1339 static TCursor c;
1340
1341 if(mode == CURSOR_SAVE) {
1342 c = term.c;
1343 } else if(mode == CURSOR_LOAD) {
1344 term.c = c;
1345 tmoveto(c.x, c.y);
1346 }
1347 }
1348
1349 void
1350 treset(void) {
1351 uint i;
1352
1353 term.c = (TCursor){{
1354 .mode = ATTR_NULL,
1355 .fg = defaultfg,
1356 .bg = defaultbg
1357 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1358
1359 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1360 for(i = tabspaces; i < term.col; i += tabspaces)
1361 term.tabs[i] = 1;
1362 term.top = 0;
1363 term.bot = term.row - 1;
1364 term.mode = MODE_WRAP;
1365
1366 tclearregion(0, 0, term.col-1, term.row-1);
1367 tmoveto(0, 0);
1368 tcursor(CURSOR_SAVE);
1369 }
1370
1371 void
1372 tnew(int col, int row) {
1373 memset(&term, 0, sizeof(Term));
1374 tresize(col, row);
1375 term.numlock = 1;
1376
1377 treset();
1378 }
1379
1380 void
1381 tswapscreen(void) {
1382 Line *tmp = term.line;
1383
1384 term.line = term.alt;
1385 term.alt = tmp;
1386 term.mode ^= MODE_ALTSCREEN;
1387 tfulldirt();
1388 }
1389
1390 void
1391 tscrolldown(int orig, int n) {
1392 int i;
1393 Line temp;
1394
1395 LIMIT(n, 0, term.bot-orig+1);
1396
1397 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1398
1399 for(i = term.bot; i >= orig+n; i--) {
1400 temp = term.line[i];
1401 term.line[i] = term.line[i-n];
1402 term.line[i-n] = temp;
1403
1404 term.dirty[i] = 1;
1405 term.dirty[i-n] = 1;
1406 }
1407
1408 selscroll(orig, n);
1409 }
1410
1411 void
1412 tscrollup(int orig, int n) {
1413 int i;
1414 Line temp;
1415 LIMIT(n, 0, term.bot-orig+1);
1416
1417 tclearregion(0, orig, term.col-1, orig+n-1);
1418
1419 for(i = orig; i <= term.bot-n; i++) {
1420 temp = term.line[i];
1421 term.line[i] = term.line[i+n];
1422 term.line[i+n] = temp;
1423
1424 term.dirty[i] = 1;
1425 term.dirty[i+n] = 1;
1426 }
1427
1428 selscroll(orig, -n);
1429 }
1430
1431 void
1432 selscroll(int orig, int n) {
1433 if(sel.ob.x == -1)
1434 return;
1435
1436 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1437 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1438 selclear(NULL);
1439 return;
1440 }
1441 if(sel.type == SEL_RECTANGULAR) {
1442 if(sel.ob.y < term.top)
1443 sel.ob.y = term.top;
1444 if(sel.oe.y > term.bot)
1445 sel.oe.y = term.bot;
1446 } else {
1447 if(sel.ob.y < term.top) {
1448 sel.ob.y = term.top;
1449 sel.ob.x = 0;
1450 }
1451 if(sel.oe.y > term.bot) {
1452 sel.oe.y = term.bot;
1453 sel.oe.x = term.col;
1454 }
1455 }
1456 selsort();
1457 }
1458 }
1459
1460 void
1461 tnewline(int first_col) {
1462 int y = term.c.y;
1463
1464 if(y == term.bot) {
1465 tscrollup(term.top, 1);
1466 } else {
1467 y++;
1468 }
1469 tmoveto(first_col ? 0 : term.c.x, y);
1470 }
1471
1472 void
1473 csiparse(void) {
1474 char *p = csiescseq.buf, *np;
1475 long int v;
1476
1477 csiescseq.narg = 0;
1478 if(*p == '?') {
1479 csiescseq.priv = 1;
1480 p++;
1481 }
1482
1483 csiescseq.buf[csiescseq.len] = '\0';
1484 while(p < csiescseq.buf+csiescseq.len) {
1485 np = NULL;
1486 v = strtol(p, &np, 10);
1487 if(np == p)
1488 v = 0;
1489 if(v == LONG_MAX || v == LONG_MIN)
1490 v = -1;
1491 csiescseq.arg[csiescseq.narg++] = v;
1492 p = np;
1493 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1494 break;
1495 p++;
1496 }
1497 csiescseq.mode = *p;
1498 }
1499
1500 /* for absolute user moves, when decom is set */
1501 void
1502 tmoveato(int x, int y) {
1503 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1504 }
1505
1506 void
1507 tmoveto(int x, int y) {
1508 int miny, maxy;
1509
1510 if(term.c.state & CURSOR_ORIGIN) {
1511 miny = term.top;
1512 maxy = term.bot;
1513 } else {
1514 miny = 0;
1515 maxy = term.row - 1;
1516 }
1517 LIMIT(x, 0, term.col-1);
1518 LIMIT(y, miny, maxy);
1519 term.c.state &= ~CURSOR_WRAPNEXT;
1520 term.c.x = x;
1521 term.c.y = y;
1522 }
1523
1524 void
1525 tsetchar(char *c, Glyph *attr, int x, int y) {
1526 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1527 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1528 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1529 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1530 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1531 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1532 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1533 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1534 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1535 };
1536
1537 /*
1538 * The table is proudly stolen from rxvt.
1539 */
1540 if(attr->mode & ATTR_GFX) {
1541 if(c[0] >= 0x41 && c[0] <= 0x7e
1542 && vt100_0[c[0] - 0x41]) {
1543 c = vt100_0[c[0] - 0x41];
1544 }
1545 }
1546
1547 term.dirty[y] = 1;
1548 term.line[y][x] = *attr;
1549 memcpy(term.line[y][x].c, c, UTF_SIZ);
1550 }
1551
1552 void
1553 tclearregion(int x1, int y1, int x2, int y2) {
1554 int x, y, temp;
1555
1556 if(x1 > x2)
1557 temp = x1, x1 = x2, x2 = temp;
1558 if(y1 > y2)
1559 temp = y1, y1 = y2, y2 = temp;
1560
1561 LIMIT(x1, 0, term.col-1);
1562 LIMIT(x2, 0, term.col-1);
1563 LIMIT(y1, 0, term.row-1);
1564 LIMIT(y2, 0, term.row-1);
1565
1566 for(y = y1; y <= y2; y++) {
1567 term.dirty[y] = 1;
1568 for(x = x1; x <= x2; x++) {
1569 if(selected(x, y))
1570 selclear(NULL);
1571 term.line[y][x] = term.c.attr;
1572 memcpy(term.line[y][x].c, " ", 2);
1573 }
1574 }
1575 }
1576
1577 void
1578 tdeletechar(int n) {
1579 int src = term.c.x + n;
1580 int dst = term.c.x;
1581 int size = term.col - src;
1582
1583 term.dirty[term.c.y] = 1;
1584
1585 if(src >= term.col) {
1586 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1587 return;
1588 }
1589
1590 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1591 size * sizeof(Glyph));
1592 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1593 }
1594
1595 void
1596 tinsertblank(int n) {
1597 int src = term.c.x;
1598 int dst = src + n;
1599 int size = term.col - dst;
1600
1601 term.dirty[term.c.y] = 1;
1602
1603 if(dst >= term.col) {
1604 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1605 return;
1606 }
1607
1608 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1609 size * sizeof(Glyph));
1610 tclearregion(src, term.c.y, dst - 1, term.c.y);
1611 }
1612
1613 void
1614 tinsertblankline(int n) {
1615 if(term.c.y < term.top || term.c.y > term.bot)
1616 return;
1617
1618 tscrolldown(term.c.y, n);
1619 }
1620
1621 void
1622 tdeleteline(int n) {
1623 if(term.c.y < term.top || term.c.y > term.bot)
1624 return;
1625
1626 tscrollup(term.c.y, n);
1627 }
1628
1629 ulong
1630 tdefcolor(int *attr, int *npar, int l) {
1631 long idx = -1;
1632 uint r, g, b;
1633
1634 switch (attr[*npar + 1]) {
1635 case 2: /* direct colour in RGB space */
1636 if (*npar + 4 >= l) {
1637 fprintf(stderr,
1638 "erresc(38): Incorrect number of parameters (%d)\n",
1639 *npar);
1640 break;
1641 }
1642 r = attr[*npar + 2];
1643 g = attr[*npar + 3];
1644 b = attr[*npar + 4];
1645 *npar += 4;
1646 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1647 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1648 r, g, b);
1649 else
1650 idx = TRUECOLOR(r, g, b);
1651 break;
1652 case 5: /* indexed colour */
1653 if (*npar + 2 >= l) {
1654 fprintf(stderr,
1655 "erresc(38): Incorrect number of parameters (%d)\n",
1656 *npar);
1657 break;
1658 }
1659 *npar += 2;
1660 if(!BETWEEN(attr[*npar], 0, 255))
1661 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1662 else
1663 idx = attr[*npar];
1664 break;
1665 case 0: /* implemented defined (only foreground) */
1666 case 1: /* transparent */
1667 case 3: /* direct colour in CMY space */
1668 case 4: /* direct colour in CMYK space */
1669 default:
1670 fprintf(stderr,
1671 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1672 }
1673
1674 return idx;
1675 }
1676
1677 void
1678 tsetattr(int *attr, int l) {
1679 int i;
1680 ulong idx;
1681
1682 for(i = 0; i < l; i++) {
1683 switch(attr[i]) {
1684 case 0:
1685 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1686 | ATTR_BOLD | ATTR_ITALIC \
1687 | ATTR_BLINK);
1688 term.c.attr.fg = defaultfg;
1689 term.c.attr.bg = defaultbg;
1690 break;
1691 case 1:
1692 term.c.attr.mode |= ATTR_BOLD;
1693 break;
1694 case 3:
1695 term.c.attr.mode |= ATTR_ITALIC;
1696 break;
1697 case 4:
1698 term.c.attr.mode |= ATTR_UNDERLINE;
1699 break;
1700 case 5: /* slow blink */
1701 case 6: /* rapid blink */
1702 term.c.attr.mode |= ATTR_BLINK;
1703 break;
1704 case 7:
1705 term.c.attr.mode |= ATTR_REVERSE;
1706 break;
1707 case 21:
1708 case 22:
1709 term.c.attr.mode &= ~ATTR_BOLD;
1710 break;
1711 case 23:
1712 term.c.attr.mode &= ~ATTR_ITALIC;
1713 break;
1714 case 24:
1715 term.c.attr.mode &= ~ATTR_UNDERLINE;
1716 break;
1717 case 25:
1718 case 26:
1719 term.c.attr.mode &= ~ATTR_BLINK;
1720 break;
1721 case 27:
1722 term.c.attr.mode &= ~ATTR_REVERSE;
1723 break;
1724 case 38:
1725 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1726 term.c.attr.fg = idx;
1727 break;
1728 case 39:
1729 term.c.attr.fg = defaultfg;
1730 break;
1731 case 48:
1732 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1733 term.c.attr.bg = idx;
1734 break;
1735 case 49:
1736 term.c.attr.bg = defaultbg;
1737 break;
1738 default:
1739 if(BETWEEN(attr[i], 30, 37)) {
1740 term.c.attr.fg = attr[i] - 30;
1741 } else if(BETWEEN(attr[i], 40, 47)) {
1742 term.c.attr.bg = attr[i] - 40;
1743 } else if(BETWEEN(attr[i], 90, 97)) {
1744 term.c.attr.fg = attr[i] - 90 + 8;
1745 } else if(BETWEEN(attr[i], 100, 107)) {
1746 term.c.attr.bg = attr[i] - 100 + 8;
1747 } else {
1748 fprintf(stderr,
1749 "erresc(default): gfx attr %d unknown\n",
1750 attr[i]), csidump();
1751 }
1752 break;
1753 }
1754 }
1755 }
1756
1757 void
1758 tsetscroll(int t, int b) {
1759 int temp;
1760
1761 LIMIT(t, 0, term.row-1);
1762 LIMIT(b, 0, term.row-1);
1763 if(t > b) {
1764 temp = t;
1765 t = b;
1766 b = temp;
1767 }
1768 term.top = t;
1769 term.bot = b;
1770 }
1771
1772 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1773
1774 void
1775 tsetmode(bool priv, bool set, int *args, int narg) {
1776 int *lim, mode;
1777 bool alt;
1778
1779 for(lim = args + narg; args < lim; ++args) {
1780 if(priv) {
1781 switch(*args) {
1782 break;
1783 case 1: /* DECCKM -- Cursor key */
1784 MODBIT(term.mode, set, MODE_APPCURSOR);
1785 break;
1786 case 5: /* DECSCNM -- Reverse video */
1787 mode = term.mode;
1788 MODBIT(term.mode, set, MODE_REVERSE);
1789 if(mode != term.mode)
1790 redraw(REDRAW_TIMEOUT);
1791 break;
1792 case 6: /* DECOM -- Origin */
1793 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1794 tmoveato(0, 0);
1795 break;
1796 case 7: /* DECAWM -- Auto wrap */
1797 MODBIT(term.mode, set, MODE_WRAP);
1798 break;
1799 case 0: /* Error (IGNORED) */
1800 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1801 case 3: /* DECCOLM -- Column (IGNORED) */
1802 case 4: /* DECSCLM -- Scroll (IGNORED) */
1803 case 8: /* DECARM -- Auto repeat (IGNORED) */
1804 case 18: /* DECPFF -- Printer feed (IGNORED) */
1805 case 19: /* DECPEX -- Printer extent (IGNORED) */
1806 case 42: /* DECNRCM -- National characters (IGNORED) */
1807 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1808 break;
1809 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1810 MODBIT(term.mode, !set, MODE_HIDE);
1811 break;
1812 case 9: /* X10 mouse compatibility mode */
1813 xsetpointermotion(0);
1814 MODBIT(term.mode, 0, MODE_MOUSE);
1815 MODBIT(term.mode, set, MODE_MOUSEX10);
1816 break;
1817 case 1000: /* 1000: report button press */
1818 xsetpointermotion(0);
1819 MODBIT(term.mode, 0, MODE_MOUSE);
1820 MODBIT(term.mode, set, MODE_MOUSEBTN);
1821 break;
1822 case 1002: /* 1002: report motion on button press */
1823 xsetpointermotion(0);
1824 MODBIT(term.mode, 0, MODE_MOUSE);
1825 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1826 break;
1827 case 1003: /* 1003: enable all mouse motions */
1828 xsetpointermotion(set);
1829 MODBIT(term.mode, 0, MODE_MOUSE);
1830 MODBIT(term.mode, set, MODE_MOUSEMANY);
1831 break;
1832 case 1004: /* 1004: send focus events to tty */
1833 MODBIT(term.mode, set, MODE_FOCUS);
1834 break;
1835 case 1006: /* 1006: extended reporting mode */
1836 MODBIT(term.mode, set, MODE_MOUSESGR);
1837 break;
1838 case 1034:
1839 MODBIT(term.mode, set, MODE_8BIT);
1840 break;
1841 case 1049: /* = 1047 and 1048 */
1842 case 47:
1843 case 1047:
1844 if (!allowaltscreen)
1845 break;
1846
1847 alt = IS_SET(MODE_ALTSCREEN);
1848 if(alt) {
1849 tclearregion(0, 0, term.col-1,
1850 term.row-1);
1851 }
1852 if(set ^ alt) /* set is always 1 or 0 */
1853 tswapscreen();
1854 if(*args != 1049)
1855 break;
1856 /* FALLTRU */
1857 case 1048:
1858 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1859 break;
1860 /* Not implemented mouse modes. See comments there. */
1861 case 1001: /* mouse highlight mode; can hang the
1862 terminal by design when implemented. */
1863 case 1005: /* UTF-8 mouse mode; will confuse
1864 applications not supporting UTF-8
1865 and luit. */
1866 case 1015: /* urxvt mangled mouse mode; incompatible
1867 and can be mistaken for other control
1868 codes. */
1869 default:
1870 fprintf(stderr,
1871 "erresc: unknown private set/reset mode %d\n",
1872 *args);
1873 break;
1874 }
1875 } else {
1876 switch(*args) {
1877 case 0: /* Error (IGNORED) */
1878 break;
1879 case 2: /* KAM -- keyboard action */
1880 MODBIT(term.mode, set, MODE_KBDLOCK);
1881 break;
1882 case 4: /* IRM -- Insertion-replacement */
1883 MODBIT(term.mode, set, MODE_INSERT);
1884 break;
1885 case 12: /* SRM -- Send/Receive */
1886 MODBIT(term.mode, !set, MODE_ECHO);
1887 break;
1888 case 20: /* LNM -- Linefeed/new line */
1889 MODBIT(term.mode, set, MODE_CRLF);
1890 break;
1891 default:
1892 fprintf(stderr,
1893 "erresc: unknown set/reset mode %d\n",
1894 *args);
1895 break;
1896 }
1897 }
1898 }
1899 }
1900
1901 void
1902 csihandle(void) {
1903 switch(csiescseq.mode) {
1904 default:
1905 unknown:
1906 fprintf(stderr, "erresc: unknown csi ");
1907 csidump();
1908 /* die(""); */
1909 break;
1910 case '@': /* ICH -- Insert <n> blank char */
1911 DEFAULT(csiescseq.arg[0], 1);
1912 tinsertblank(csiescseq.arg[0]);
1913 break;
1914 case 'A': /* CUU -- Cursor <n> Up */
1915 DEFAULT(csiescseq.arg[0], 1);
1916 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1917 break;
1918 case 'B': /* CUD -- Cursor <n> Down */
1919 case 'e': /* VPR --Cursor <n> Down */
1920 DEFAULT(csiescseq.arg[0], 1);
1921 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1922 break;
1923 case 'c': /* DA -- Device Attributes */
1924 if(csiescseq.arg[0] == 0)
1925 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1926 break;
1927 case 'C': /* CUF -- Cursor <n> Forward */
1928 case 'a': /* HPR -- Cursor <n> Forward */
1929 DEFAULT(csiescseq.arg[0], 1);
1930 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1931 break;
1932 case 'D': /* CUB -- Cursor <n> Backward */
1933 DEFAULT(csiescseq.arg[0], 1);
1934 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1935 break;
1936 case 'E': /* CNL -- Cursor <n> Down and first col */
1937 DEFAULT(csiescseq.arg[0], 1);
1938 tmoveto(0, term.c.y+csiescseq.arg[0]);
1939 break;
1940 case 'F': /* CPL -- Cursor <n> Up and first col */
1941 DEFAULT(csiescseq.arg[0], 1);
1942 tmoveto(0, term.c.y-csiescseq.arg[0]);
1943 break;
1944 case 'g': /* TBC -- Tabulation clear */
1945 switch(csiescseq.arg[0]) {
1946 case 0: /* clear current tab stop */
1947 term.tabs[term.c.x] = 0;
1948 break;
1949 case 3: /* clear all the tabs */
1950 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1951 break;
1952 default:
1953 goto unknown;
1954 }
1955 break;
1956 case 'G': /* CHA -- Move to <col> */
1957 case '`': /* HPA */
1958 DEFAULT(csiescseq.arg[0], 1);
1959 tmoveto(csiescseq.arg[0]-1, term.c.y);
1960 break;
1961 case 'H': /* CUP -- Move to <row> <col> */
1962 case 'f': /* HVP */
1963 DEFAULT(csiescseq.arg[0], 1);
1964 DEFAULT(csiescseq.arg[1], 1);
1965 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1966 break;
1967 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1968 DEFAULT(csiescseq.arg[0], 1);
1969 while(csiescseq.arg[0]--)
1970 tputtab(1);
1971 break;
1972 case 'J': /* ED -- Clear screen */
1973 selclear(NULL);
1974 switch(csiescseq.arg[0]) {
1975 case 0: /* below */
1976 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1977 if(term.c.y < term.row-1) {
1978 tclearregion(0, term.c.y+1, term.col-1,
1979 term.row-1);
1980 }
1981 break;
1982 case 1: /* above */
1983 if(term.c.y > 1)
1984 tclearregion(0, 0, term.col-1, term.c.y-1);
1985 tclearregion(0, term.c.y, term.c.x, term.c.y);
1986 break;
1987 case 2: /* all */
1988 tclearregion(0, 0, term.col-1, term.row-1);
1989 break;
1990 default:
1991 goto unknown;
1992 }
1993 break;
1994 case 'K': /* EL -- Clear line */
1995 switch(csiescseq.arg[0]) {
1996 case 0: /* right */
1997 tclearregion(term.c.x, term.c.y, term.col-1,
1998 term.c.y);
1999 break;
2000 case 1: /* left */
2001 tclearregion(0, term.c.y, term.c.x, term.c.y);
2002 break;
2003 case 2: /* all */
2004 tclearregion(0, term.c.y, term.col-1, term.c.y);
2005 break;
2006 }
2007 break;
2008 case 'S': /* SU -- Scroll <n> line up */
2009 DEFAULT(csiescseq.arg[0], 1);
2010 tscrollup(term.top, csiescseq.arg[0]);
2011 break;
2012 case 'T': /* SD -- Scroll <n> line down */
2013 DEFAULT(csiescseq.arg[0], 1);
2014 tscrolldown(term.top, csiescseq.arg[0]);
2015 break;
2016 case 'L': /* IL -- Insert <n> blank lines */
2017 DEFAULT(csiescseq.arg[0], 1);
2018 tinsertblankline(csiescseq.arg[0]);
2019 break;
2020 case 'l': /* RM -- Reset Mode */
2021 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2022 break;
2023 case 'M': /* DL -- Delete <n> lines */
2024 DEFAULT(csiescseq.arg[0], 1);
2025 tdeleteline(csiescseq.arg[0]);
2026 break;
2027 case 'X': /* ECH -- Erase <n> char */
2028 DEFAULT(csiescseq.arg[0], 1);
2029 tclearregion(term.c.x, term.c.y,
2030 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2031 break;
2032 case 'P': /* DCH -- Delete <n> char */
2033 DEFAULT(csiescseq.arg[0], 1);
2034 tdeletechar(csiescseq.arg[0]);
2035 break;
2036 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2037 DEFAULT(csiescseq.arg[0], 1);
2038 while(csiescseq.arg[0]--)
2039 tputtab(0);
2040 break;
2041 case 'd': /* VPA -- Move to <row> */
2042 DEFAULT(csiescseq.arg[0], 1);
2043 tmoveato(term.c.x, csiescseq.arg[0]-1);
2044 break;
2045 case 'h': /* SM -- Set terminal mode */
2046 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2047 break;
2048 case 'm': /* SGR -- Terminal attribute (color) */
2049 tsetattr(csiescseq.arg, csiescseq.narg);
2050 break;
2051 case 'r': /* DECSTBM -- Set Scrolling Region */
2052 if(csiescseq.priv) {
2053 goto unknown;
2054 } else {
2055 DEFAULT(csiescseq.arg[0], 1);
2056 DEFAULT(csiescseq.arg[1], term.row);
2057 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2058 tmoveato(0, 0);
2059 }
2060 break;
2061 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2062 tcursor(CURSOR_SAVE);
2063 break;
2064 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2065 tcursor(CURSOR_LOAD);
2066 break;
2067 }
2068 }
2069
2070 void
2071 csidump(void) {
2072 int i;
2073 uint c;
2074
2075 printf("ESC[");
2076 for(i = 0; i < csiescseq.len; i++) {
2077 c = csiescseq.buf[i] & 0xff;
2078 if(isprint(c)) {
2079 putchar(c);
2080 } else if(c == '\n') {
2081 printf("(\\n)");
2082 } else if(c == '\r') {
2083 printf("(\\r)");
2084 } else if(c == 0x1b) {
2085 printf("(\\e)");
2086 } else {
2087 printf("(%02x)", c);
2088 }
2089 }
2090 putchar('\n');
2091 }
2092
2093 void
2094 csireset(void) {
2095 memset(&csiescseq, 0, sizeof(csiescseq));
2096 }
2097
2098 void
2099 strhandle(void) {
2100 char *p = NULL;
2101 int i, j, narg;
2102
2103 strparse();
2104 narg = strescseq.narg;
2105
2106 switch(strescseq.type) {
2107 case ']': /* OSC -- Operating System Command */
2108 switch(i = atoi(strescseq.args[0])) {
2109 case 0:
2110 case 1:
2111 case 2:
2112 if(narg > 1)
2113 xsettitle(strescseq.args[1]);
2114 break;
2115 case 4: /* color set */
2116 if(narg < 3)
2117 break;
2118 p = strescseq.args[2];
2119 /* fall through */
2120 case 104: /* color reset, here p = NULL */
2121 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2122 if (!xsetcolorname(j, p)) {
2123 fprintf(stderr, "erresc: invalid color %s\n", p);
2124 } else {
2125 /*
2126 * TODO if defaultbg color is changed, borders
2127 * are dirty
2128 */
2129 redraw(0);
2130 }
2131 break;
2132 default:
2133 fprintf(stderr, "erresc: unknown str ");
2134 strdump();
2135 break;
2136 }
2137 break;
2138 case 'k': /* old title set compatibility */
2139 xsettitle(strescseq.args[0]);
2140 break;
2141 case 'P': /* DSC -- Device Control String */
2142 case '_': /* APC -- Application Program Command */
2143 case '^': /* PM -- Privacy Message */
2144 default:
2145 fprintf(stderr, "erresc: unknown str ");
2146 strdump();
2147 /* die(""); */
2148 break;
2149 }
2150 }
2151
2152 void
2153 strparse(void) {
2154 char *p = strescseq.buf;
2155
2156 strescseq.narg = 0;
2157 strescseq.buf[strescseq.len] = '\0';
2158 while(p && strescseq.narg < STR_ARG_SIZ)
2159 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2160 }
2161
2162 void
2163 strdump(void) {
2164 int i;
2165 uint c;
2166
2167 printf("ESC%c", strescseq.type);
2168 for(i = 0; i < strescseq.len; i++) {
2169 c = strescseq.buf[i] & 0xff;
2170 if(c == '\0') {
2171 return;
2172 } else if(isprint(c)) {
2173 putchar(c);
2174 } else if(c == '\n') {
2175 printf("(\\n)");
2176 } else if(c == '\r') {
2177 printf("(\\r)");
2178 } else if(c == 0x1b) {
2179 printf("(\\e)");
2180 } else {
2181 printf("(%02x)", c);
2182 }
2183 }
2184 printf("ESC\\\n");
2185 }
2186
2187 void
2188 strreset(void) {
2189 memset(&strescseq, 0, sizeof(strescseq));
2190 }
2191
2192 void
2193 tputtab(bool forward) {
2194 uint x = term.c.x;
2195
2196 if(forward) {
2197 if(x == term.col)
2198 return;
2199 for(++x; x < term.col && !term.tabs[x]; ++x)
2200 /* nothing */ ;
2201 } else {
2202 if(x == 0)
2203 return;
2204 for(--x; x > 0 && !term.tabs[x]; --x)
2205 /* nothing */ ;
2206 }
2207 tmoveto(x, term.c.y);
2208 }
2209
2210 void
2211 techo(char *buf, int len) {
2212 for(; len > 0; buf++, len--) {
2213 char c = *buf;
2214
2215 if(c == '\033') { /* escape */
2216 tputc("^", 1);
2217 tputc("[", 1);
2218 } else if(c < '\x20') { /* control code */
2219 if(c != '\n' && c != '\r' && c != '\t') {
2220 c |= '\x40';
2221 tputc("^", 1);
2222 }
2223 tputc(&c, 1);
2224 } else {
2225 break;
2226 }
2227 }
2228 if(len)
2229 tputc(buf, len);
2230 }
2231
2232 void
2233 tputc(char *c, int len) {
2234 uchar ascii = *c;
2235 bool control = ascii < '\x20' || ascii == 0177;
2236
2237 if(iofd != -1) {
2238 if(xwrite(iofd, c, len) < 0) {
2239 fprintf(stderr, "Error writing in %s:%s\n",
2240 opt_io, strerror(errno));
2241 close(iofd);
2242 iofd = -1;
2243 }
2244 }
2245
2246 /*
2247 * STR sequences must be checked before anything else
2248 * because it can use some control codes as part of the sequence.
2249 */
2250 if(term.esc & ESC_STR) {
2251 switch(ascii) {
2252 case '\033':
2253 term.esc = ESC_START | ESC_STR_END;
2254 break;
2255 case '\a': /* backwards compatibility to xterm */
2256 term.esc = 0;
2257 strhandle();
2258 break;
2259 default:
2260 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2261 memmove(&strescseq.buf[strescseq.len], c, len);
2262 strescseq.len += len;
2263 } else {
2264 /*
2265 * Here is a bug in terminals. If the user never sends
2266 * some code to stop the str or esc command, then st
2267 * will stop responding. But this is better than
2268 * silently failing with unknown characters. At least
2269 * then users will report back.
2270 *
2271 * In the case users ever get fixed, here is the code:
2272 */
2273 /*
2274 * term.esc = 0;
2275 * strhandle();
2276 */
2277 }
2278 }
2279 return;
2280 }
2281
2282 /*
2283 * Actions of control codes must be performed as soon they arrive
2284 * because they can be embedded inside a control sequence, and
2285 * they must not cause conflicts with sequences.
2286 */
2287 if(control) {
2288 switch(ascii) {
2289 case '\t': /* HT */
2290 tputtab(1);
2291 return;
2292 case '\b': /* BS */
2293 tmoveto(term.c.x-1, term.c.y);
2294 return;
2295 case '\r': /* CR */
2296 tmoveto(0, term.c.y);
2297 return;
2298 case '\f': /* LF */
2299 case '\v': /* VT */
2300 case '\n': /* LF */
2301 /* go to first col if the mode is set */
2302 tnewline(IS_SET(MODE_CRLF));
2303 return;
2304 case '\a': /* BEL */
2305 if(!(xw.state & WIN_FOCUSED))
2306 xseturgency(1);
2307 return;
2308 case '\033': /* ESC */
2309 csireset();
2310 term.esc = ESC_START;
2311 return;
2312 case '\016': /* SO */
2313 case '\017': /* SI */
2314 /*
2315 * Different charsets are hard to handle. Applications
2316 * should use the right alt charset escapes for the
2317 * only reason they still exist: line drawing. The
2318 * rest is incompatible history st should not support.
2319 */
2320 return;
2321 case '\032': /* SUB */
2322 case '\030': /* CAN */
2323 csireset();
2324 return;
2325 case '\005': /* ENQ (IGNORED) */
2326 case '\000': /* NUL (IGNORED) */
2327 case '\021': /* XON (IGNORED) */
2328 case '\023': /* XOFF (IGNORED) */
2329 case 0177: /* DEL (IGNORED) */
2330 return;
2331 }
2332 } else if(term.esc & ESC_START) {
2333 if(term.esc & ESC_CSI) {
2334 csiescseq.buf[csiescseq.len++] = ascii;
2335 if(BETWEEN(ascii, 0x40, 0x7E)
2336 || csiescseq.len >= \
2337 sizeof(csiescseq.buf)-1) {
2338 term.esc = 0;
2339 csiparse();
2340 csihandle();
2341 }
2342 } else if(term.esc & ESC_STR_END) {
2343 term.esc = 0;
2344 if(ascii == '\\')
2345 strhandle();
2346 } else if(term.esc & ESC_ALTCHARSET) {
2347 switch(ascii) {
2348 case '0': /* Line drawing set */
2349 term.c.attr.mode |= ATTR_GFX;
2350 break;
2351 case 'B': /* USASCII */
2352 term.c.attr.mode &= ~ATTR_GFX;
2353 break;
2354 case 'A': /* UK (IGNORED) */
2355 case '<': /* multinational charset (IGNORED) */
2356 case '5': /* Finnish (IGNORED) */
2357 case 'C': /* Finnish (IGNORED) */
2358 case 'K': /* German (IGNORED) */
2359 break;
2360 default:
2361 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2362 }
2363 term.esc = 0;
2364 } else if(term.esc & ESC_TEST) {
2365 if(ascii == '8') { /* DEC screen alignment test. */
2366 char E[UTF_SIZ] = "E";
2367 int x, y;
2368
2369 for(x = 0; x < term.col; ++x) {
2370 for(y = 0; y < term.row; ++y)
2371 tsetchar(E, &term.c.attr, x, y);
2372 }
2373 }
2374 term.esc = 0;
2375 } else {
2376 switch(ascii) {
2377 case '[':
2378 term.esc |= ESC_CSI;
2379 break;
2380 case '#':
2381 term.esc |= ESC_TEST;
2382 break;
2383 case 'P': /* DCS -- Device Control String */
2384 case '_': /* APC -- Application Program Command */
2385 case '^': /* PM -- Privacy Message */
2386 case ']': /* OSC -- Operating System Command */
2387 case 'k': /* old title set compatibility */
2388 strreset();
2389 strescseq.type = ascii;
2390 term.esc |= ESC_STR;
2391 break;
2392 case '(': /* set primary charset G0 */
2393 term.esc |= ESC_ALTCHARSET;
2394 break;
2395 case ')': /* set secondary charset G1 (IGNORED) */
2396 case '*': /* set tertiary charset G2 (IGNORED) */
2397 case '+': /* set quaternary charset G3 (IGNORED) */
2398 term.esc = 0;
2399 break;
2400 case 'D': /* IND -- Linefeed */
2401 if(term.c.y == term.bot) {
2402 tscrollup(term.top, 1);
2403 } else {
2404 tmoveto(term.c.x, term.c.y+1);
2405 }
2406 term.esc = 0;
2407 break;
2408 case 'E': /* NEL -- Next line */
2409 tnewline(1); /* always go to first col */
2410 term.esc = 0;
2411 break;
2412 case 'H': /* HTS -- Horizontal tab stop */
2413 term.tabs[term.c.x] = 1;
2414 term.esc = 0;
2415 break;
2416 case 'M': /* RI -- Reverse index */
2417 if(term.c.y == term.top) {
2418 tscrolldown(term.top, 1);
2419 } else {
2420 tmoveto(term.c.x, term.c.y-1);
2421 }
2422 term.esc = 0;
2423 break;
2424 case 'Z': /* DECID -- Identify Terminal */
2425 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2426 term.esc = 0;
2427 break;
2428 case 'c': /* RIS -- Reset to inital state */
2429 treset();
2430 term.esc = 0;
2431 xresettitle();
2432 xloadcols();
2433 break;
2434 case '=': /* DECPAM -- Application keypad */
2435 term.mode |= MODE_APPKEYPAD;
2436 term.esc = 0;
2437 break;
2438 case '>': /* DECPNM -- Normal keypad */
2439 term.mode &= ~MODE_APPKEYPAD;
2440 term.esc = 0;
2441 break;
2442 case '7': /* DECSC -- Save Cursor */
2443 tcursor(CURSOR_SAVE);
2444 term.esc = 0;
2445 break;
2446 case '8': /* DECRC -- Restore Cursor */
2447 tcursor(CURSOR_LOAD);
2448 term.esc = 0;
2449 break;
2450 case '\\': /* ST -- Stop */
2451 term.esc = 0;
2452 break;
2453 default:
2454 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2455 (uchar) ascii, isprint(ascii)? ascii:'.');
2456 term.esc = 0;
2457 }
2458 }
2459 /*
2460 * All characters which form part of a sequence are not
2461 * printed
2462 */
2463 return;
2464 }
2465 /*
2466 * Display control codes only if we are in graphic mode
2467 */
2468 if(control && !(term.c.attr.mode & ATTR_GFX))
2469 return;
2470 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2471 selclear(NULL);
2472 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2473 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2474 tnewline(1);
2475 }
2476
2477 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2478 memmove(&term.line[term.c.y][term.c.x+1],
2479 &term.line[term.c.y][term.c.x],
2480 (term.col - term.c.x - 1) * sizeof(Glyph));
2481 }
2482
2483 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2484 if(term.c.x+1 < term.col) {
2485 tmoveto(term.c.x+1, term.c.y);
2486 } else {
2487 term.c.state |= CURSOR_WRAPNEXT;
2488 }
2489 }
2490
2491 int
2492 tresize(int col, int row) {
2493 int i;
2494 int minrow = MIN(row, term.row);
2495 int mincol = MIN(col, term.col);
2496 int slide = term.c.y - row + 1;
2497 bool *bp;
2498 Line *orig;
2499
2500 if(col < 1 || row < 1)
2501 return 0;
2502
2503 /* free unneeded rows */
2504 i = 0;
2505 if(slide > 0) {
2506 /*
2507 * slide screen to keep cursor where we expect it -
2508 * tscrollup would work here, but we can optimize to
2509 * memmove because we're freeing the earlier lines
2510 */
2511 for(/* i = 0 */; i < slide; i++) {
2512 free(term.line[i]);
2513 free(term.alt[i]);
2514 }
2515 memmove(term.line, term.line + slide, row * sizeof(Line));
2516 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2517 }
2518 for(i += row; i < term.row; i++) {
2519 free(term.line[i]);
2520 free(term.alt[i]);
2521 }
2522
2523 /* resize to new height */
2524 term.line = xrealloc(term.line, row * sizeof(Line));
2525 term.alt = xrealloc(term.alt, row * sizeof(Line));
2526 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2527 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2528
2529 /* resize each row to new width, zero-pad if needed */
2530 for(i = 0; i < minrow; i++) {
2531 term.dirty[i] = 1;
2532 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2533 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2534 }
2535
2536 /* allocate any new rows */
2537 for(/* i == minrow */; i < row; i++) {
2538 term.dirty[i] = 1;
2539 term.line[i] = xcalloc(col, sizeof(Glyph));
2540 term.alt [i] = xcalloc(col, sizeof(Glyph));
2541 }
2542 if(col > term.col) {
2543 bp = term.tabs + term.col;
2544
2545 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2546 while(--bp > term.tabs && !*bp)
2547 /* nothing */ ;
2548 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2549 *bp = 1;
2550 }
2551 /* update terminal size */
2552 term.col = col;
2553 term.row = row;
2554 /* reset scrolling region */
2555 tsetscroll(0, row-1);
2556 /* make use of the LIMIT in tmoveto */
2557 tmoveto(term.c.x, term.c.y);
2558 /* Clearing both screens */
2559 orig = term.line;
2560 do {
2561 if(mincol < col && 0 < minrow) {
2562 tclearregion(mincol, 0, col - 1, minrow - 1);
2563 }
2564 if(0 < col && minrow < row) {
2565 tclearregion(0, minrow, col - 1, row - 1);
2566 }
2567 tswapscreen();
2568 } while(orig != term.line);
2569
2570 return (slide > 0);
2571 }
2572
2573 void
2574 xresize(int col, int row) {
2575 xw.tw = MAX(1, col * xw.cw);
2576 xw.th = MAX(1, row * xw.ch);
2577
2578 XFreePixmap(xw.dpy, xw.buf);
2579 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2580 DefaultDepth(xw.dpy, xw.scr));
2581 XftDrawChange(xw.draw, xw.buf);
2582 xclear(0, 0, xw.w, xw.h);
2583 }
2584
2585 static inline ushort
2586 sixd_to_16bit(int x) {
2587 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2588 }
2589
2590 void
2591 xloadcols(void) {
2592 int i, r, g, b;
2593 XRenderColor color = { .alpha = 0xffff };
2594 static bool loaded;
2595 Colour *cp;
2596
2597 if(loaded) {
2598 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2599 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2600 }
2601
2602 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2603 for(i = 0; i < LEN(colorname); i++) {
2604 if(!colorname[i])
2605 continue;
2606 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2607 die("Could not allocate color '%s'\n", colorname[i]);
2608 }
2609 }
2610
2611 /* load colors [16-255] ; same colors as xterm */
2612 for(i = 16, r = 0; r < 6; r++) {
2613 for(g = 0; g < 6; g++) {
2614 for(b = 0; b < 6; b++) {
2615 color.red = sixd_to_16bit(r);
2616 color.green = sixd_to_16bit(g);
2617 color.blue = sixd_to_16bit(b);
2618 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2619 die("Could not allocate color %d\n", i);
2620 }
2621 i++;
2622 }
2623 }
2624 }
2625
2626 for(r = 0; r < 24; r++, i++) {
2627 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2628 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2629 &dc.col[i])) {
2630 die("Could not allocate color %d\n", i);
2631 }
2632 }
2633 loaded = true;
2634 }
2635
2636 int
2637 xsetcolorname(int x, const char *name) {
2638 XRenderColor color = { .alpha = 0xffff };
2639 Colour colour;
2640 if (x < 0 || x > LEN(colorname))
2641 return -1;
2642 if(!name) {
2643 if(16 <= x && x < 16 + 216) {
2644 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2645 color.red = sixd_to_16bit(r);
2646 color.green = sixd_to_16bit(g);
2647 color.blue = sixd_to_16bit(b);
2648 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2649 return 0; /* something went wrong */
2650 dc.col[x] = colour;
2651 return 1;
2652 } else if (16 + 216 <= x && x < 256) {
2653 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2654 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2655 return 0; /* something went wrong */
2656 dc.col[x] = colour;
2657 return 1;
2658 } else {
2659 name = colorname[x];
2660 }
2661 }
2662 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2663 return 0;
2664 dc.col[x] = colour;
2665 return 1;
2666 }
2667
2668 void
2669 xtermclear(int col1, int row1, int col2, int row2) {
2670 XftDrawRect(xw.draw,
2671 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2672 borderpx + col1 * xw.cw,
2673 borderpx + row1 * xw.ch,
2674 (col2-col1+1) * xw.cw,
2675 (row2-row1+1) * xw.ch);
2676 }
2677
2678 /*
2679 * Absolute coordinates.
2680 */
2681 void
2682 xclear(int x1, int y1, int x2, int y2) {
2683 XftDrawRect(xw.draw,
2684 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2685 x1, y1, x2-x1, y2-y1);
2686 }
2687
2688 void
2689 xhints(void) {
2690 XClassHint class = {opt_class ? opt_class : termname, termname};
2691 XWMHints wm = {.flags = InputHint, .input = 1};
2692 XSizeHints *sizeh = NULL;
2693
2694 sizeh = XAllocSizeHints();
2695 if(xw.isfixed == False) {
2696 sizeh->flags = PSize | PResizeInc | PBaseSize;
2697 sizeh->height = xw.h;
2698 sizeh->width = xw.w;
2699 sizeh->height_inc = xw.ch;
2700 sizeh->width_inc = xw.cw;
2701 sizeh->base_height = 2 * borderpx;
2702 sizeh->base_width = 2 * borderpx;
2703 } else {
2704 sizeh->flags = PMaxSize | PMinSize;
2705 sizeh->min_width = sizeh->max_width = xw.fw;
2706 sizeh->min_height = sizeh->max_height = xw.fh;
2707 }
2708
2709 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2710 XFree(sizeh);
2711 }
2712
2713 int
2714 xloadfont(Font *f, FcPattern *pattern) {
2715 FcPattern *match;
2716 FcResult result;
2717
2718 match = FcFontMatch(NULL, pattern, &result);
2719 if(!match)
2720 return 1;
2721
2722 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2723 FcPatternDestroy(match);
2724 return 1;
2725 }
2726
2727 f->set = NULL;
2728 f->pattern = FcPatternDuplicate(pattern);
2729
2730 f->ascent = f->match->ascent;
2731 f->descent = f->match->descent;
2732 f->lbearing = 0;
2733 f->rbearing = f->match->max_advance_width;
2734
2735 f->height = f->ascent + f->descent;
2736 f->width = f->lbearing + f->rbearing;
2737
2738 return 0;
2739 }
2740
2741 void
2742 xloadfonts(char *fontstr, int fontsize) {
2743 FcPattern *pattern;
2744 FcResult result;
2745 double fontval;
2746
2747 if(fontstr[0] == '-') {
2748 pattern = XftXlfdParse(fontstr, False, False);
2749 } else {
2750 pattern = FcNameParse((FcChar8 *)fontstr);
2751 }
2752
2753 if(!pattern)
2754 die("st: can't open font %s\n", fontstr);
2755
2756 if(fontsize > 0) {
2757 FcPatternDel(pattern, FC_PIXEL_SIZE);
2758 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2759 usedfontsize = fontsize;
2760 } else {
2761 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2762 if(result == FcResultMatch) {
2763 usedfontsize = (int)fontval;
2764 } else {
2765 /*
2766 * Default font size is 12, if none given. This is to
2767 * have a known usedfontsize value.
2768 */
2769 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2770 usedfontsize = 12;
2771 }
2772 }
2773
2774 FcConfigSubstitute(0, pattern, FcMatchPattern);
2775 FcDefaultSubstitute(pattern);
2776
2777 if(xloadfont(&dc.font, pattern))
2778 die("st: can't open font %s\n", fontstr);
2779
2780 /* Setting character width and height. */
2781 xw.cw = CEIL(dc.font.width * cwscale);
2782 xw.ch = CEIL(dc.font.height * chscale);
2783
2784 FcPatternDel(pattern, FC_SLANT);
2785 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2786 if(xloadfont(&dc.ifont, pattern))
2787 die("st: can't open font %s\n", fontstr);
2788
2789 FcPatternDel(pattern, FC_WEIGHT);
2790 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2791 if(xloadfont(&dc.ibfont, pattern))
2792 die("st: can't open font %s\n", fontstr);
2793
2794 FcPatternDel(pattern, FC_SLANT);
2795 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2796 if(xloadfont(&dc.bfont, pattern))
2797 die("st: can't open font %s\n", fontstr);
2798
2799 FcPatternDestroy(pattern);
2800 }
2801
2802 int
2803 xloadfontset(Font *f) {
2804 FcResult result;
2805
2806 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2807 return 1;
2808 return 0;
2809 }
2810
2811 void
2812 xunloadfont(Font *f) {
2813 XftFontClose(xw.dpy, f->match);
2814 FcPatternDestroy(f->pattern);
2815 if(f->set)
2816 FcFontSetDestroy(f->set);
2817 }
2818
2819 void
2820 xunloadfonts(void) {
2821 int i;
2822
2823 /* Free the loaded fonts in the font cache. */
2824 for(i = 0; i < frclen; i++) {
2825 XftFontClose(xw.dpy, frc[i].font);
2826 }
2827 frclen = 0;
2828
2829 xunloadfont(&dc.font);
2830 xunloadfont(&dc.bfont);
2831 xunloadfont(&dc.ifont);
2832 xunloadfont(&dc.ibfont);
2833 }
2834
2835 void
2836 xzoom(const Arg *arg) {
2837 xunloadfonts();
2838 xloadfonts(usedfont, usedfontsize + arg->i);
2839 cresize(0, 0);
2840 redraw(0);
2841 }
2842
2843 void
2844 xinit(void) {
2845 XGCValues gcvalues;
2846 Cursor cursor;
2847 Window parent;
2848 int sw, sh;
2849
2850 if(!(xw.dpy = XOpenDisplay(NULL)))
2851 die("Can't open display\n");
2852 xw.scr = XDefaultScreen(xw.dpy);
2853 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2854
2855 /* font */
2856 if(!FcInit())
2857 die("Could not init fontconfig.\n");
2858
2859 usedfont = (opt_font == NULL)? font : opt_font;
2860 xloadfonts(usedfont, 0);
2861
2862 /* colors */
2863 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2864 xloadcols();
2865
2866 /* adjust fixed window geometry */
2867 if(xw.isfixed) {
2868 sw = DisplayWidth(xw.dpy, xw.scr);
2869 sh = DisplayHeight(xw.dpy, xw.scr);
2870 if(xw.fx < 0)
2871 xw.fx = sw + xw.fx - xw.fw - 1;
2872 if(xw.fy < 0)
2873 xw.fy = sh + xw.fy - xw.fh - 1;
2874
2875 xw.h = xw.fh;
2876 xw.w = xw.fw;
2877 } else {
2878 /* window - default size */
2879 xw.h = 2 * borderpx + term.row * xw.ch;
2880 xw.w = 2 * borderpx + term.col * xw.cw;
2881 xw.fx = 0;
2882 xw.fy = 0;
2883 }
2884
2885 /* Events */
2886 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
2887 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
2888 xw.attrs.bit_gravity = NorthWestGravity;
2889 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
2890 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2891 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2892 xw.attrs.colormap = xw.cmap;
2893
2894 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2895 XRootWindow(xw.dpy, xw.scr);
2896 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2897 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2898 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
2899 | CWEventMask | CWColormap, &xw.attrs);
2900
2901 memset(&gcvalues, 0, sizeof(gcvalues));
2902 gcvalues.graphics_exposures = False;
2903 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2904 &gcvalues);
2905 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2906 DefaultDepth(xw.dpy, xw.scr));
2907 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2908 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2909
2910 /* Xft rendering context */
2911 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2912
2913 /* input methods */
2914 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2915 XSetLocaleModifiers("@im=local");
2916 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2917 XSetLocaleModifiers("@im=");
2918 if((xw.xim = XOpenIM(xw.dpy,
2919 NULL, NULL, NULL)) == NULL) {
2920 die("XOpenIM failed. Could not open input"
2921 " device.\n");
2922 }
2923 }
2924 }
2925 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2926 | XIMStatusNothing, XNClientWindow, xw.win,
2927 XNFocusWindow, xw.win, NULL);
2928 if(xw.xic == NULL)
2929 die("XCreateIC failed. Could not obtain input method.\n");
2930
2931 /* white cursor, black outline */
2932 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2933 XDefineCursor(xw.dpy, xw.win, cursor);
2934 XRecolorCursor(xw.dpy, cursor,
2935 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2936 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2937
2938 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2939 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2940 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2941
2942 xresettitle();
2943 XMapWindow(xw.dpy, xw.win);
2944 xhints();
2945 XSync(xw.dpy, 0);
2946 }
2947
2948 void
2949 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2950 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2951 width = charlen * xw.cw, xp, i;
2952 int frcflags;
2953 int u8fl, u8fblen, u8cblen, doesexist;
2954 char *u8c, *u8fs;
2955 long u8char;
2956 Font *font = &dc.font;
2957 FcResult fcres;
2958 FcPattern *fcpattern, *fontpattern;
2959 FcFontSet *fcsets[] = { NULL };
2960 FcCharSet *fccharset;
2961 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
2962 XRenderColor colfg, colbg;
2963 Rectangle r;
2964 int oneatatime;
2965
2966 frcflags = FRC_NORMAL;
2967
2968 if(base.mode & ATTR_ITALIC) {
2969 if(base.fg == defaultfg)
2970 base.fg = defaultitalic;
2971 font = &dc.ifont;
2972 frcflags = FRC_ITALIC;
2973 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
2974 if(base.fg == defaultfg)
2975 base.fg = defaultitalic;
2976 font = &dc.ibfont;
2977 frcflags = FRC_ITALICBOLD;
2978 } else if(base.mode & ATTR_UNDERLINE) {
2979 if(base.fg == defaultfg)
2980 base.fg = defaultunderline;
2981 }
2982 if(IS_TRUECOL(base.fg)) {
2983 colfg.red = TRUERED(base.fg);
2984 colfg.green = TRUEGREEN(base.fg);
2985 colfg.blue = TRUEBLUE(base.fg);
2986 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
2987 fg = &truefg;
2988 } else {
2989 fg = &dc.col[base.fg];
2990 }
2991
2992 if(IS_TRUECOL(base.bg)) {
2993 colbg.green = TRUEGREEN(base.bg);
2994 colbg.red = TRUERED(base.bg);
2995 colbg.blue = TRUEBLUE(base.bg);
2996 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
2997 bg = &truebg;
2998 } else {
2999 bg = &dc.col[base.bg];
3000 }
3001
3002
3003
3004 if(base.mode & ATTR_BOLD) {
3005 if(BETWEEN(base.fg, 0, 7)) {
3006 /* basic system colors */
3007 fg = &dc.col[base.fg + 8];
3008 } else if(BETWEEN(base.fg, 16, 195)) {
3009 /* 256 colors */
3010 fg = &dc.col[base.fg + 36];
3011 } else if(BETWEEN(base.fg, 232, 251)) {
3012 /* greyscale */
3013 fg = &dc.col[base.fg + 4];
3014 }
3015 /*
3016 * Those ranges will not be brightened:
3017 * 8 - 15 – bright system colors
3018 * 196 - 231 – highest 256 color cube
3019 * 252 - 255 – brightest colors in greyscale
3020 */
3021 font = &dc.bfont;
3022 frcflags = FRC_BOLD;
3023 }
3024
3025 if(IS_SET(MODE_REVERSE)) {
3026 if(fg == &dc.col[defaultfg]) {
3027 fg = &dc.col[defaultbg];
3028 } else {
3029 colfg.red = ~fg->color.red;
3030 colfg.green = ~fg->color.green;
3031 colfg.blue = ~fg->color.blue;
3032 colfg.alpha = fg->color.alpha;
3033 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3034 fg = &revfg;
3035 }
3036
3037 if(bg == &dc.col[defaultbg]) {
3038 bg = &dc.col[defaultfg];
3039 } else {
3040 colbg.red = ~bg->color.red;
3041 colbg.green = ~bg->color.green;
3042 colbg.blue = ~bg->color.blue;
3043 colbg.alpha = bg->color.alpha;
3044 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
3045 bg = &revbg;
3046 }
3047 }
3048
3049 if(base.mode & ATTR_REVERSE) {
3050 temp = fg;
3051 fg = bg;
3052 bg = temp;
3053 }
3054
3055 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3056 fg = bg;
3057
3058 /* Intelligent cleaning up of the borders. */
3059 if(x == 0) {
3060 xclear(0, (y == 0)? 0 : winy, borderpx,
3061 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3062 }
3063 if(x + charlen >= term.col) {
3064 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3065 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3066 }
3067 if(y == 0)
3068 xclear(winx, 0, winx + width, borderpx);
3069 if(y == term.row-1)
3070 xclear(winx, winy + xw.ch, winx + width, xw.h);
3071
3072 /* Clean up the region we want to draw to. */
3073 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3074
3075 /* Set the clip region because Xft is sometimes dirty. */
3076 r.x = 0;
3077 r.y = 0;
3078 r.height = xw.ch;
3079 r.width = width;
3080 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3081
3082 for(xp = winx; bytelen > 0;) {
3083 /*
3084 * Search for the range in the to be printed string of glyphs
3085 * that are in the main font. Then print that range. If
3086 * some glyph is found that is not in the font, do the
3087 * fallback dance.
3088 */
3089 u8fs = s;
3090 u8fblen = 0;
3091 u8fl = 0;
3092 oneatatime = font->width != xw.cw;
3093 for(;;) {
3094 u8c = s;
3095 u8cblen = utf8decode(s, &u8char);
3096 s += u8cblen;
3097 bytelen -= u8cblen;
3098
3099 doesexist = XftCharExists(xw.dpy, font->match, u8char);
3100 if(oneatatime || !doesexist || bytelen <= 0) {
3101 if(oneatatime || bytelen <= 0) {
3102 if(doesexist) {
3103 u8fl++;
3104 u8fblen += u8cblen;
3105 }
3106 }
3107
3108 if(u8fl > 0) {
3109 XftDrawStringUtf8(xw.draw, fg,
3110 font->match, xp,
3111 winy + font->ascent,
3112 (FcChar8 *)u8fs,
3113 u8fblen);
3114 xp += CEIL(font->width * cwscale * u8fl);
3115
3116 }
3117 break;
3118 }
3119
3120 u8fl++;
3121 u8fblen += u8cblen;
3122 }
3123 if(doesexist) {
3124 if (oneatatime);
3125 continue;
3126 break;
3127 }
3128
3129 /* Search the font cache. */
3130 for(i = 0; i < frclen; i++) {
3131 if(XftCharExists(xw.dpy, frc[i].font, u8char)
3132 && frc[i].flags == frcflags) {
3133 break;
3134 }
3135 }
3136
3137 /* Nothing was found. */
3138 if(i >= frclen) {
3139 if(!font->set)
3140 xloadfontset(font);
3141 fcsets[0] = font->set;
3142
3143 /*
3144 * Nothing was found in the cache. Now use
3145 * some dozen of Fontconfig calls to get the
3146 * font for one single character.
3147 */
3148 fcpattern = FcPatternDuplicate(font->pattern);
3149 fccharset = FcCharSetCreate();
3150
3151 FcCharSetAddChar(fccharset, u8char);
3152 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3153 fccharset);
3154 FcPatternAddBool(fcpattern, FC_SCALABLE,
3155 FcTrue);
3156
3157 FcConfigSubstitute(0, fcpattern,
3158 FcMatchPattern);
3159 FcDefaultSubstitute(fcpattern);
3160
3161 fontpattern = FcFontSetMatch(0, fcsets,
3162 FcTrue, fcpattern, &fcres);
3163
3164 /*
3165 * Overwrite or create the new cache entry.
3166 */
3167 if(frclen >= LEN(frc)) {
3168 frclen = LEN(frc) - 1;
3169 XftFontClose(xw.dpy, frc[frclen].font);
3170 }
3171
3172 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3173 fontpattern);
3174 frc[frclen].flags = frcflags;
3175
3176 i = frclen;
3177 frclen++;
3178
3179 FcPatternDestroy(fcpattern);
3180 FcCharSetDestroy(fccharset);
3181 }
3182
3183 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3184 xp, winy + frc[i].font->ascent,
3185 (FcChar8 *)u8c, u8cblen);
3186
3187 xp += CEIL(font->width * cwscale);
3188 }
3189
3190 /*
3191 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3192 winy + font->ascent, (FcChar8 *)s, bytelen);
3193 */
3194
3195 if(base.mode & ATTR_UNDERLINE) {
3196 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3197 width, 1);
3198 }
3199
3200 /* Reset clip to none. */
3201 XftDrawSetClip(xw.draw, 0);
3202 }
3203
3204 void
3205 xdrawcursor(void) {
3206 static int oldx = 0, oldy = 0;
3207 int sl;
3208 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3209
3210 LIMIT(oldx, 0, term.col-1);
3211 LIMIT(oldy, 0, term.row-1);
3212
3213 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3214
3215 /* remove the old cursor */
3216 sl = utf8size(term.line[oldy][oldx].c);
3217 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3218 oldy, 1, sl);
3219
3220 /* draw the new one */
3221 if(!(IS_SET(MODE_HIDE))) {
3222 if(xw.state & WIN_FOCUSED) {
3223 if(IS_SET(MODE_REVERSE)) {
3224 g.mode |= ATTR_REVERSE;
3225 g.fg = defaultcs;
3226 g.bg = defaultfg;
3227 }
3228
3229 sl = utf8size(g.c);
3230 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
3231 } else {
3232 XftDrawRect(xw.draw, &dc.col[defaultcs],
3233 borderpx + term.c.x * xw.cw,
3234 borderpx + term.c.y * xw.ch,
3235 xw.cw - 1, 1);
3236 XftDrawRect(xw.draw, &dc.col[defaultcs],
3237 borderpx + term.c.x * xw.cw,
3238 borderpx + term.c.y * xw.ch,
3239 1, xw.ch - 1);
3240 XftDrawRect(xw.draw, &dc.col[defaultcs],
3241 borderpx + (term.c.x + 1) * xw.cw - 1,
3242 borderpx + term.c.y * xw.ch,
3243 1, xw.ch - 1);
3244 XftDrawRect(xw.draw, &dc.col[defaultcs],
3245 borderpx + term.c.x * xw.cw,
3246 borderpx + (term.c.y + 1) * xw.ch - 1,
3247 xw.cw, 1);
3248 }
3249 oldx = term.c.x, oldy = term.c.y;
3250 }
3251 }
3252
3253
3254 void
3255 xsettitle(char *p) {
3256 XTextProperty prop;
3257
3258 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3259 &prop);
3260 XSetWMName(xw.dpy, xw.win, &prop);
3261 XFree(prop.value);
3262 }
3263
3264 void
3265 xresettitle(void) {
3266 xsettitle(opt_title ? opt_title : "st");
3267 }
3268
3269 void
3270 redraw(int timeout) {
3271 struct timespec tv = {0, timeout * 1000};
3272
3273 tfulldirt();
3274 draw();
3275
3276 if(timeout > 0) {
3277 nanosleep(&tv, NULL);
3278 XSync(xw.dpy, False); /* necessary for a good tput flash */
3279 }
3280 }
3281
3282 void
3283 draw(void) {
3284 drawregion(0, 0, term.col, term.row);
3285 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3286 xw.h, 0, 0);
3287 XSetForeground(xw.dpy, dc.gc,
3288 dc.col[IS_SET(MODE_REVERSE)?
3289 defaultfg : defaultbg].pixel);
3290 }
3291
3292 void
3293 drawregion(int x1, int y1, int x2, int y2) {
3294 int ic, ib, x, y, ox, sl;
3295 Glyph base, new;
3296 char buf[DRAW_BUF_SIZ];
3297 bool ena_sel = sel.ob.x != -1;
3298
3299 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3300 ena_sel = 0;
3301
3302 if(!(xw.state & WIN_VISIBLE))
3303 return;
3304
3305 for(y = y1; y < y2; y++) {
3306 if(!term.dirty[y])
3307 continue;
3308
3309 xtermclear(0, y, term.col, y);
3310 term.dirty[y] = 0;
3311 base = term.line[y][0];
3312 ic = ib = ox = 0;
3313 for(x = x1; x < x2; x++) {
3314 new = term.line[y][x];
3315 if(ena_sel && selected(x, y))
3316 new.mode ^= ATTR_REVERSE;
3317 if(ib > 0 && (ATTRCMP(base, new)
3318 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3319 xdraws(buf, base, ox, y, ic, ib);
3320 ic = ib = 0;
3321 }
3322 if(ib == 0) {
3323 ox = x;
3324 base = new;
3325 }
3326
3327 sl = utf8size(new.c);
3328 memcpy(buf+ib, new.c, sl);
3329 ib += sl;
3330 ++ic;
3331 }
3332 if(ib > 0)
3333 xdraws(buf, base, ox, y, ic, ib);
3334 }
3335 xdrawcursor();
3336 }
3337
3338 void
3339 expose(XEvent *ev) {
3340 XExposeEvent *e = &ev->xexpose;
3341
3342 if(xw.state & WIN_REDRAW) {
3343 if(!e->count)
3344 xw.state &= ~WIN_REDRAW;
3345 }
3346 redraw(0);
3347 }
3348
3349 void
3350 visibility(XEvent *ev) {
3351 XVisibilityEvent *e = &ev->xvisibility;
3352
3353 if(e->state == VisibilityFullyObscured) {
3354 xw.state &= ~WIN_VISIBLE;
3355 } else if(!(xw.state & WIN_VISIBLE)) {
3356 /* need a full redraw for next Expose, not just a buf copy */
3357 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3358 }
3359 }
3360
3361 void
3362 unmap(XEvent *ev) {
3363 xw.state &= ~WIN_VISIBLE;
3364 }
3365
3366 void
3367 xsetpointermotion(int set) {
3368 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3369 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3370 }
3371
3372 void
3373 xseturgency(int add) {
3374 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3375
3376 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3377 XSetWMHints(xw.dpy, xw.win, h);
3378 XFree(h);
3379 }
3380
3381 void
3382 focus(XEvent *ev) {
3383 XFocusChangeEvent *e = &ev->xfocus;
3384
3385 if(e->mode == NotifyGrab)
3386 return;
3387
3388 if(ev->type == FocusIn) {
3389 XSetICFocus(xw.xic);
3390 xw.state |= WIN_FOCUSED;
3391 xseturgency(0);
3392 if(IS_SET(MODE_FOCUS))
3393 ttywrite("\033[I", 3);
3394 } else {
3395 XUnsetICFocus(xw.xic);
3396 xw.state &= ~WIN_FOCUSED;
3397 if(IS_SET(MODE_FOCUS))
3398 ttywrite("\033[O", 3);
3399 }
3400 }
3401
3402 static inline bool
3403 match(uint mask, uint state) {
3404 state &= ~ignoremod;
3405
3406 if(mask == XK_NO_MOD && state)
3407 return false;
3408 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3409 return false;
3410 if(mask == XK_ANY_MOD)
3411 return true;
3412 return state == mask;
3413 }
3414
3415 void
3416 numlock(const Arg *dummy) {
3417 term.numlock ^= 1;
3418 }
3419
3420 char*
3421 kmap(KeySym k, uint state) {
3422 Key *kp;
3423 int i;
3424
3425 /* Check for mapped keys out of X11 function keys. */
3426 for(i = 0; i < LEN(mappedkeys); i++) {
3427 if(mappedkeys[i] == k)
3428 break;
3429 }
3430 if(i == LEN(mappedkeys)) {
3431 if((k & 0xFFFF) < 0xFD00)
3432 return NULL;
3433 }
3434
3435 for(kp = key; kp < key + LEN(key); kp++) {
3436 if(kp->k != k)
3437 continue;
3438
3439 if(!match(kp->mask, state))
3440 continue;
3441
3442 if(kp->appkey > 0) {
3443 if(!IS_SET(MODE_APPKEYPAD))
3444 continue;
3445 if(term.numlock && kp->appkey == 2)
3446 continue;
3447 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3448 continue;
3449 }
3450
3451 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3452 (kp->appcursor > 0
3453 && !IS_SET(MODE_APPCURSOR))) {
3454 continue;
3455 }
3456
3457 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3458 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3459 continue;
3460 }
3461
3462 return kp->s;
3463 }
3464
3465 return NULL;
3466 }
3467
3468 void
3469 kpress(XEvent *ev) {
3470 XKeyEvent *e = &ev->xkey;
3471 KeySym ksym;
3472 char xstr[31], buf[32], *customkey, *cp = buf;
3473 int len, ret;
3474 long c;
3475 Status status;
3476 Shortcut *bp;
3477
3478 if(IS_SET(MODE_KBDLOCK))
3479 return;
3480
3481 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3482 e->state &= ~Mod2Mask;
3483 /* 1. shortcuts */
3484 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3485 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3486 bp->func(&(bp->arg));
3487 return;
3488 }
3489 }
3490
3491 /* 2. custom keys from config.h */
3492 if((customkey = kmap(ksym, e->state))) {
3493 len = strlen(customkey);
3494 memcpy(buf, customkey, len);
3495 /* 3. hardcoded (overrides X lookup) */
3496 } else {
3497 if(len == 0)
3498 return;
3499
3500 if(len == 1 && e->state & Mod1Mask) {
3501 if(IS_SET(MODE_8BIT)) {
3502 if(*xstr < 0177) {
3503 c = *xstr | 0x80;
3504 ret = utf8encode(&c, cp);
3505 cp += ret;
3506 len = 0;
3507 }
3508 } else {
3509 *cp++ = '\033';
3510 }
3511 }
3512
3513 memcpy(cp, xstr, len);
3514 len = cp - buf + len;
3515 }
3516
3517 ttywrite(buf, len);
3518 if(IS_SET(MODE_ECHO))
3519 techo(buf, len);
3520 }
3521
3522
3523 void
3524 cmessage(XEvent *e) {
3525 /*
3526 * See xembed specs
3527 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3528 */
3529 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3530 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3531 xw.state |= WIN_FOCUSED;
3532 xseturgency(0);
3533 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3534 xw.state &= ~WIN_FOCUSED;
3535 }
3536 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3537 /* Send SIGHUP to shell */
3538 kill(pid, SIGHUP);
3539 exit(EXIT_SUCCESS);
3540 }
3541 }
3542
3543 void
3544 cresize(int width, int height) {
3545 int col, row;
3546
3547 if(width != 0)
3548 xw.w = width;
3549 if(height != 0)
3550 xw.h = height;
3551
3552 col = (xw.w - 2 * borderpx) / xw.cw;
3553 row = (xw.h - 2 * borderpx) / xw.ch;
3554
3555 tresize(col, row);
3556 xresize(col, row);
3557 ttyresize();
3558 }
3559
3560 void
3561 resize(XEvent *e) {
3562 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3563 return;
3564
3565 cresize(e->xconfigure.width, e->xconfigure.height);
3566 }
3567
3568 void
3569 run(void) {
3570 XEvent ev;
3571 int w = xw.w, h = xw.h;
3572 fd_set rfd;
3573 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3574 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3575
3576 /* Waiting for window mapping */
3577 while(1) {
3578 XNextEvent(xw.dpy, &ev);
3579 if(ev.type == ConfigureNotify) {
3580 w = ev.xconfigure.width;
3581 h = ev.xconfigure.height;
3582 } else if(ev.type == MapNotify) {
3583 break;
3584 }
3585 }
3586
3587 if(!xw.isfixed)
3588 cresize(w, h);
3589 else
3590 cresize(xw.fw, xw.fh);
3591 ttynew();
3592
3593 gettimeofday(&lastblink, NULL);
3594 gettimeofday(&last, NULL);
3595
3596 for(xev = actionfps;;) {
3597 FD_ZERO(&rfd);
3598 FD_SET(cmdfd, &rfd);
3599 FD_SET(xfd, &rfd);
3600
3601 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3602 if(errno == EINTR)
3603 continue;
3604 die("select failed: %s\n", SERRNO);
3605 }
3606 if(FD_ISSET(cmdfd, &rfd)) {
3607 ttyread();
3608 if(blinktimeout) {
3609 blinkset = tattrset(ATTR_BLINK);
3610 if(!blinkset)
3611 MODBIT(term.mode, 0, MODE_BLINK);
3612 }
3613 }
3614
3615 if(FD_ISSET(xfd, &rfd))
3616 xev = actionfps;
3617
3618 gettimeofday(&now, NULL);
3619 drawtimeout.tv_sec = 0;
3620 drawtimeout.tv_usec = (1000/xfps) * 1000;
3621 tv = &drawtimeout;
3622
3623 dodraw = 0;
3624 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3625 tsetdirtattr(ATTR_BLINK);
3626 term.mode ^= MODE_BLINK;
3627 gettimeofday(&lastblink, NULL);
3628 dodraw = 1;
3629 }
3630 if(TIMEDIFF(now, last) \
3631 > (xev? (1000/xfps) : (1000/actionfps))) {
3632 dodraw = 1;
3633 last = now;
3634 }
3635
3636 if(dodraw) {
3637 while(XPending(xw.dpy)) {
3638 XNextEvent(xw.dpy, &ev);
3639 if(XFilterEvent(&ev, None))
3640 continue;
3641 if(handler[ev.type])
3642 (handler[ev.type])(&ev);
3643 }
3644
3645 draw();
3646 XFlush(xw.dpy);
3647
3648 if(xev && !FD_ISSET(xfd, &rfd))
3649 xev--;
3650 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3651 if(blinkset) {
3652 if(TIMEDIFF(now, lastblink) \
3653 > blinktimeout) {
3654 drawtimeout.tv_usec = 1;
3655 } else {
3656 drawtimeout.tv_usec = (1000 * \
3657 (blinktimeout - \
3658 TIMEDIFF(now,
3659 lastblink)));
3660 }
3661 } else {
3662 tv = NULL;
3663 }
3664 }
3665 }
3666 }
3667 }
3668
3669 void
3670 usage(void) {
3671 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3672 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3673 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3674 }
3675
3676 int
3677 main(int argc, char *argv[]) {
3678 int bitm, xr, yr;
3679 uint wr, hr;
3680 char *titles;
3681
3682 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3683 xw.isfixed = False;
3684
3685 ARGBEGIN {
3686 case 'a':
3687 allowaltscreen = false;
3688 break;
3689 case 'c':
3690 opt_class = EARGF(usage());
3691 break;
3692 case 'e':
3693 /* eat all remaining arguments */
3694 if(argc > 1) {
3695 opt_cmd = &argv[1];
3696 if(argv[1] != NULL && opt_title == NULL) {
3697 titles = strdup(argv[1]);
3698 opt_title = basename(titles);
3699 }
3700 }
3701 goto run;
3702 case 'f':
3703 opt_font = EARGF(usage());
3704 break;
3705 case 'g':
3706 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3707 if(bitm & XValue)
3708 xw.fx = xr;
3709 if(bitm & YValue)
3710 xw.fy = yr;
3711 if(bitm & WidthValue)
3712 xw.fw = (int)wr;
3713 if(bitm & HeightValue)
3714 xw.fh = (int)hr;
3715 if(bitm & XNegative && xw.fx == 0)
3716 xw.fx = -1;
3717 if(bitm & XNegative && xw.fy == 0)
3718 xw.fy = -1;
3719
3720 if(xw.fh != 0 && xw.fw != 0)
3721 xw.isfixed = True;
3722 break;
3723 case 'o':
3724 opt_io = EARGF(usage());
3725 break;
3726 case 't':
3727 opt_title = EARGF(usage());
3728 break;
3729 case 'w':
3730 opt_embed = EARGF(usage());
3731 break;
3732 case 'v':
3733 default:
3734 usage();
3735 } ARGEND;
3736
3737 run:
3738 setlocale(LC_CTYPE, "");
3739 XSetLocaleModifiers("");
3740 tnew(80, 24);
3741 xinit();
3742 selinit();
3743 run();
3744
3745 return 0;
3746 }
3747