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12fcc90e5b40ee990c6bb25c58aaf87c01413089
[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 #include <wchar.h>
31
32 #include "arg.h"
33
34 char *argv0;
35
36 #define Glyph Glyph_
37 #define Font Font_
38 #define Draw XftDraw *
39 #define Colour XftColor
40 #define Colourmap Colormap
41 #define Rectangle XRectangle
42
43 #if defined(__linux)
44 #include <pty.h>
45 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
46 #include <util.h>
47 #elif defined(__FreeBSD__) || defined(__DragonFly__)
48 #include <libutil.h>
49 #endif
50
51
52 /* XEMBED messages */
53 #define XEMBED_FOCUS_IN 4
54 #define XEMBED_FOCUS_OUT 5
55
56 /* Arbitrary sizes */
57 #define UTF_SIZ 4
58 #define ESC_BUF_SIZ (128*UTF_SIZ)
59 #define ESC_ARG_SIZ 16
60 #define STR_BUF_SIZ ESC_BUF_SIZ
61 #define STR_ARG_SIZ ESC_ARG_SIZ
62 #define DRAW_BUF_SIZ 20*1024
63 #define XK_ANY_MOD UINT_MAX
64 #define XK_NO_MOD 0
65 #define XK_SWITCH_MOD (1<<13)
66
67 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
68
69 /* macros */
70 #define SERRNO strerror(errno)
71 #define MIN(a, b) ((a) < (b) ? (a) : (b))
72 #define MAX(a, b) ((a) < (b) ? (b) : (a))
73 #define LEN(a) (sizeof(a) / sizeof(a[0]))
74 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
75 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
80 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
81
82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
83 #define IS_TRUECOL(x) (1 << 24 & (x))
84 #define TRUERED(x) (((x) & 0xff0000) >> 8)
85 #define TRUEGREEN(x) (((x) & 0xff00))
86 #define TRUEBLUE(x) (((x) & 0xff) << 8)
87
88
89 #define VT102ID "\033[?6c"
90
91 enum glyph_attribute {
92 ATTR_NULL = 0,
93 ATTR_REVERSE = 1,
94 ATTR_UNDERLINE = 2,
95 ATTR_BOLD = 4,
96 ATTR_GFX = 8,
97 ATTR_ITALIC = 16,
98 ATTR_BLINK = 32,
99 ATTR_WRAP = 64,
100 ATTR_WIDE = 128,
101 ATTR_WDUMMY = 256,
102 };
103
104 enum cursor_movement {
105 CURSOR_SAVE,
106 CURSOR_LOAD
107 };
108
109 enum cursor_state {
110 CURSOR_DEFAULT = 0,
111 CURSOR_WRAPNEXT = 1,
112 CURSOR_ORIGIN = 2
113 };
114
115 enum term_mode {
116 MODE_WRAP = 1,
117 MODE_INSERT = 2,
118 MODE_APPKEYPAD = 4,
119 MODE_ALTSCREEN = 8,
120 MODE_CRLF = 16,
121 MODE_MOUSEBTN = 32,
122 MODE_MOUSEMOTION = 64,
123 MODE_REVERSE = 128,
124 MODE_KBDLOCK = 256,
125 MODE_HIDE = 512,
126 MODE_ECHO = 1024,
127 MODE_APPCURSOR = 2048,
128 MODE_MOUSESGR = 4096,
129 MODE_8BIT = 8192,
130 MODE_BLINK = 16384,
131 MODE_FBLINK = 32768,
132 MODE_FOCUS = 65536,
133 MODE_MOUSEX10 = 131072,
134 MODE_MOUSEMANY = 262144,
135 MODE_BRCKTPASTE = 524288,
136 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
137 |MODE_MOUSEMANY,
138 };
139
140 enum escape_state {
141 ESC_START = 1,
142 ESC_CSI = 2,
143 ESC_STR = 4, /* DSC, OSC, PM, APC */
144 ESC_ALTCHARSET = 8,
145 ESC_STR_END = 16, /* a final string was encountered */
146 ESC_TEST = 32, /* Enter in test mode */
147 };
148
149 enum window_state {
150 WIN_VISIBLE = 1,
151 WIN_REDRAW = 2,
152 WIN_FOCUSED = 4
153 };
154
155 enum selection_type {
156 SEL_REGULAR = 1,
157 SEL_RECTANGULAR = 2
158 };
159
160 enum selection_snap {
161 SNAP_WORD = 1,
162 SNAP_LINE = 2
163 };
164
165 typedef unsigned char uchar;
166 typedef unsigned int uint;
167 typedef unsigned long ulong;
168 typedef unsigned short ushort;
169
170 typedef struct {
171 char c[UTF_SIZ]; /* character code */
172 ushort mode; /* attribute flags */
173 ulong fg; /* foreground */
174 ulong bg; /* background */
175 } Glyph;
176
177 typedef Glyph *Line;
178
179 typedef struct {
180 Glyph attr; /* current char attributes */
181 int x;
182 int y;
183 char state;
184 } TCursor;
185
186 /* CSI Escape sequence structs */
187 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
188 typedef struct {
189 char buf[ESC_BUF_SIZ]; /* raw string */
190 int len; /* raw string length */
191 char priv;
192 int arg[ESC_ARG_SIZ];
193 int narg; /* nb of args */
194 char mode;
195 } CSIEscape;
196
197 /* STR Escape sequence structs */
198 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
199 typedef struct {
200 char type; /* ESC type ... */
201 char buf[STR_BUF_SIZ]; /* raw string */
202 int len; /* raw string length */
203 char *args[STR_ARG_SIZ];
204 int narg; /* nb of args */
205 } STREscape;
206
207 /* Internal representation of the screen */
208 typedef struct {
209 int row; /* nb row */
210 int col; /* nb col */
211 Line *line; /* screen */
212 Line *alt; /* alternate screen */
213 bool *dirty; /* dirtyness of lines */
214 TCursor c; /* cursor */
215 int top; /* top scroll limit */
216 int bot; /* bottom scroll limit */
217 int mode; /* terminal mode flags */
218 int esc; /* escape state flags */
219 bool numlock; /* lock numbers in keyboard */
220 bool *tabs;
221 } Term;
222
223 /* Purely graphic info */
224 typedef struct {
225 Display *dpy;
226 Colourmap cmap;
227 Window win;
228 Drawable buf;
229 Atom xembed, wmdeletewin;
230 XIM xim;
231 XIC xic;
232 Draw draw;
233 Visual *vis;
234 XSetWindowAttributes attrs;
235 int scr;
236 bool isfixed; /* is fixed geometry? */
237 int fx, fy, fw, fh; /* fixed geometry */
238 int tw, th; /* tty width and height */
239 int w, h; /* window width and height */
240 int ch; /* char height */
241 int cw; /* char width */
242 char state; /* focus, redraw, visible */
243 } XWindow;
244
245 typedef struct {
246 int b;
247 uint mask;
248 char s[ESC_BUF_SIZ];
249 } Mousekey;
250
251 typedef struct {
252 KeySym k;
253 uint mask;
254 char s[ESC_BUF_SIZ];
255 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
256 signed char appkey; /* application keypad */
257 signed char appcursor; /* application cursor */
258 signed char crlf; /* crlf mode */
259 } Key;
260
261 typedef struct {
262 int mode;
263 int type;
264 int snap;
265 /*
266 * Selection variables:
267 * nb – normalized coordinates of the beginning of the selection
268 * ne – normalized coordinates of the end of the selection
269 * ob – original coordinates of the beginning of the selection
270 * oe – original coordinates of the end of the selection
271 */
272 struct {
273 int x, y;
274 } nb, ne, ob, oe;
275
276 char *clip;
277 Atom xtarget;
278 bool alt;
279 struct timeval tclick1;
280 struct timeval tclick2;
281 } Selection;
282
283 typedef union {
284 int i;
285 unsigned int ui;
286 float f;
287 const void *v;
288 } Arg;
289
290 typedef struct {
291 unsigned int mod;
292 KeySym keysym;
293 void (*func)(const Arg *);
294 const Arg arg;
295 } Shortcut;
296
297 /* function definitions used in config.h */
298 static void clippaste(const Arg *);
299 static void numlock(const Arg *);
300 static void selpaste(const Arg *);
301 static void xzoom(const Arg *);
302
303 /* Config.h for applying patches and the configuration. */
304 #include "config.h"
305
306 /* Font structure */
307 typedef struct {
308 int height;
309 int width;
310 int ascent;
311 int descent;
312 short lbearing;
313 short rbearing;
314 XftFont *match;
315 FcFontSet *set;
316 FcPattern *pattern;
317 } Font;
318
319 /* Drawing Context */
320 typedef struct {
321 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
322 Font font, bfont, ifont, ibfont;
323 GC gc;
324 } DC;
325
326 static void die(const char *, ...);
327 static void draw(void);
328 static void redraw(int);
329 static void drawregion(int, int, int, int);
330 static void execsh(void);
331 static void sigchld(int);
332 static void run(void);
333
334 static void csidump(void);
335 static void csihandle(void);
336 static void csiparse(void);
337 static void csireset(void);
338 static void strdump(void);
339 static void strhandle(void);
340 static void strparse(void);
341 static void strreset(void);
342
343 static int tattrset(int);
344 static void tclearregion(int, int, int, int);
345 static void tcursor(int);
346 static void tdeletechar(int);
347 static void tdeleteline(int);
348 static void tinsertblank(int);
349 static void tinsertblankline(int);
350 static void tmoveto(int, int);
351 static void tmoveato(int x, int y);
352 static void tnew(int, int);
353 static void tnewline(int);
354 static void tputtab(bool);
355 static void tputc(char *, int);
356 static void treset(void);
357 static int tresize(int, int);
358 static void tscrollup(int, int);
359 static void tscrolldown(int, int);
360 static void tsetattr(int*, int);
361 static void tsetchar(char *, Glyph *, int, int);
362 static void tsetscroll(int, int);
363 static void tswapscreen(void);
364 static void tsetdirt(int, int);
365 static void tsetdirtattr(int);
366 static void tsetmode(bool, bool, int *, int);
367 static void tfulldirt(void);
368 static void techo(char *, int);
369 static long tdefcolor(int *, int *, int);
370 static inline bool match(uint, uint);
371 static void ttynew(void);
372 static void ttyread(void);
373 static void ttyresize(void);
374 static void ttywrite(const char *, size_t);
375
376 static void xdraws(char *, Glyph, int, int, int, int);
377 static void xhints(void);
378 static void xclear(int, int, int, int);
379 static void xdrawcursor(void);
380 static void xinit(void);
381 static void xloadcols(void);
382 static int xsetcolorname(int, const char *);
383 static int xloadfont(Font *, FcPattern *);
384 static void xloadfonts(char *, int);
385 static int xloadfontset(Font *);
386 static void xsettitle(char *);
387 static void xresettitle(void);
388 static void xsetpointermotion(int);
389 static void xseturgency(int);
390 static void xsetsel(char*);
391 static void xtermclear(int, int, int, int);
392 static void xunloadfont(Font *f);
393 static void xunloadfonts(void);
394 static void xresize(int, int);
395
396 static void expose(XEvent *);
397 static void visibility(XEvent *);
398 static void unmap(XEvent *);
399 static char *kmap(KeySym, uint);
400 static void kpress(XEvent *);
401 static void cmessage(XEvent *);
402 static void cresize(int, int);
403 static void resize(XEvent *);
404 static void focus(XEvent *);
405 static void brelease(XEvent *);
406 static void bpress(XEvent *);
407 static void bmotion(XEvent *);
408 static void selnotify(XEvent *);
409 static void selclear(XEvent *);
410 static void selrequest(XEvent *);
411
412 static void selinit(void);
413 static void selsort(void);
414 static inline bool selected(int, int);
415 static void selcopy(void);
416 static void selscroll(int, int);
417 static void selsnap(int, int *, int *, int);
418
419 static int utf8decode(char *, long *);
420 static int utf8encode(long *, char *);
421 static int utf8size(char *);
422 static int isfullutf8(char *, int);
423
424 static ssize_t xwrite(int, char *, size_t);
425 static void *xmalloc(size_t);
426 static void *xrealloc(void *, size_t);
427
428 static void (*handler[LASTEvent])(XEvent *) = {
429 [KeyPress] = kpress,
430 [ClientMessage] = cmessage,
431 [ConfigureNotify] = resize,
432 [VisibilityNotify] = visibility,
433 [UnmapNotify] = unmap,
434 [Expose] = expose,
435 [FocusIn] = focus,
436 [FocusOut] = focus,
437 [MotionNotify] = bmotion,
438 [ButtonPress] = bpress,
439 [ButtonRelease] = brelease,
440 [SelectionClear] = selclear,
441 [SelectionNotify] = selnotify,
442 [SelectionRequest] = selrequest,
443 };
444
445 /* Globals */
446 static DC dc;
447 static XWindow xw;
448 static Term term;
449 static CSIEscape csiescseq;
450 static STREscape strescseq;
451 static int cmdfd;
452 static pid_t pid;
453 static Selection sel;
454 static int iofd = -1;
455 static char **opt_cmd = NULL;
456 static char *opt_io = NULL;
457 static char *opt_title = NULL;
458 static char *opt_embed = NULL;
459 static char *opt_class = NULL;
460 static char *opt_font = NULL;
461 static int oldbutton = 3; /* button event on startup: 3 = release */
462
463 static char *usedfont = NULL;
464 static int usedfontsize = 0;
465
466 /* Font Ring Cache */
467 enum {
468 FRC_NORMAL,
469 FRC_ITALIC,
470 FRC_BOLD,
471 FRC_ITALICBOLD
472 };
473
474 typedef struct {
475 XftFont *font;
476 int flags;
477 } Fontcache;
478
479 /* Fontcache is an array now. A new font will be appended to the array. */
480 static Fontcache frc[16];
481 static int frclen = 0;
482
483 ssize_t
484 xwrite(int fd, char *s, size_t len) {
485 size_t aux = len;
486
487 while(len > 0) {
488 ssize_t r = write(fd, s, len);
489 if(r < 0)
490 return r;
491 len -= r;
492 s += r;
493 }
494 return aux;
495 }
496
497 void *
498 xmalloc(size_t len) {
499 void *p = malloc(len);
500
501 if(!p)
502 die("Out of memory\n");
503
504 return p;
505 }
506
507 void *
508 xrealloc(void *p, size_t len) {
509 if((p = realloc(p, len)) == NULL)
510 die("Out of memory\n");
511
512 return p;
513 }
514
515 int
516 utf8decode(char *s, long *u) {
517 uchar c;
518 int i, n, rtn;
519
520 rtn = 1;
521 c = *s;
522 if(~c & 0x80) { /* 0xxxxxxx */
523 *u = c;
524 return rtn;
525 } else if((c & 0xE0) == 0xC0) { /* 110xxxxx */
526 *u = c & 0x1F;
527 n = 1;
528 } else if((c & 0xF0) == 0xE0) { /* 1110xxxx */
529 *u = c & 0x0F;
530 n = 2;
531 } else if((c & 0xF8) == 0xF0) { /* 11110xxx */
532 *u = c & 0x07;
533 n = 3;
534 } else {
535 goto invalid;
536 }
537
538 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
539 c = *s;
540 if((c & 0xC0) != 0x80) /* 10xxxxxx */
541 goto invalid;
542 *u <<= 6;
543 *u |= c & 0x3F;
544 }
545
546 if((n == 1 && *u < 0x80) ||
547 (n == 2 && *u < 0x800) ||
548 (n == 3 && *u < 0x10000) ||
549 (*u >= 0xD800 && *u <= 0xDFFF)) {
550 goto invalid;
551 }
552
553 return rtn;
554 invalid:
555 *u = 0xFFFD;
556
557 return rtn;
558 }
559
560 int
561 utf8encode(long *u, char *s) {
562 uchar *sp;
563 ulong uc;
564 int i, n;
565
566 sp = (uchar *)s;
567 uc = *u;
568 if(uc < 0x80) {
569 *sp = uc; /* 0xxxxxxx */
570 return 1;
571 } else if(*u < 0x800) {
572 *sp = (uc >> 6) | 0xC0; /* 110xxxxx */
573 n = 1;
574 } else if(uc < 0x10000) {
575 *sp = (uc >> 12) | 0xE0; /* 1110xxxx */
576 n = 2;
577 } else if(uc <= 0x10FFFF) {
578 *sp = (uc >> 18) | 0xF0; /* 11110xxx */
579 n = 3;
580 } else {
581 goto invalid;
582 }
583
584 for(i=n,++sp; i>0; --i,++sp)
585 *sp = ((uc >> 6*(i-1)) & 0x3F) | 0x80; /* 10xxxxxx */
586
587 return n+1;
588 invalid:
589 /* U+FFFD */
590 *s++ = '\xEF';
591 *s++ = '\xBF';
592 *s = '\xBD';
593
594 return 3;
595 }
596
597 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
598 UTF-8 otherwise return 0 */
599 int
600 isfullutf8(char *s, int b) {
601 uchar *c1, *c2, *c3;
602
603 c1 = (uchar *)s;
604 c2 = (uchar *)++s;
605 c3 = (uchar *)++s;
606 if(b < 1) {
607 return 0;
608 } else if((*c1 & 0xE0) == 0xC0 && b == 1) {
609 return 0;
610 } else if((*c1 & 0xF0) == 0xE0 &&
611 ((b == 1) ||
612 ((b == 2) && (*c2 & 0xC0) == 0x80))) {
613 return 0;
614 } else if((*c1 & 0xF8) == 0xF0 &&
615 ((b == 1) ||
616 ((b == 2) && (*c2 & 0xC0) == 0x80) ||
617 ((b == 3) && (*c2 & 0xC0) == 0x80 && (*c3 & 0xC0) == 0x80))) {
618 return 0;
619 } else {
620 return 1;
621 }
622 }
623
624 int
625 utf8size(char *s) {
626 uchar c = *s;
627
628 if(~c & 0x80) {
629 return 1;
630 } else if((c & 0xE0) == 0xC0) {
631 return 2;
632 } else if((c & 0xF0) == 0xE0) {
633 return 3;
634 } else {
635 return 4;
636 }
637 }
638
639 static void
640 selinit(void) {
641 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
642 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
643 sel.mode = 0;
644 sel.ob.x = -1;
645 sel.clip = NULL;
646 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
647 if(sel.xtarget == None)
648 sel.xtarget = XA_STRING;
649 }
650
651 static int
652 x2col(int x) {
653 x -= borderpx;
654 x /= xw.cw;
655
656 return LIMIT(x, 0, term.col-1);
657 }
658
659 static int
660 y2row(int y) {
661 y -= borderpx;
662 y /= xw.ch;
663
664 return LIMIT(y, 0, term.row-1);
665 }
666
667 static void
668 selsort(void) {
669 if(sel.ob.y == sel.oe.y) {
670 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
671 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
672 } else {
673 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
674 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
675 }
676 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
677 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
678 }
679
680 static inline bool
681 selected(int x, int y) {
682 if(sel.ne.y == y && sel.nb.y == y)
683 return BETWEEN(x, sel.nb.x, sel.ne.x);
684
685 if(sel.type == SEL_RECTANGULAR) {
686 return ((sel.nb.y <= y && y <= sel.ne.y)
687 && (sel.nb.x <= x && x <= sel.ne.x));
688 }
689
690 return ((sel.nb.y < y && y < sel.ne.y)
691 || (y == sel.ne.y && x <= sel.ne.x))
692 || (y == sel.nb.y && x >= sel.nb.x
693 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
694 }
695
696 void
697 selsnap(int mode, int *x, int *y, int direction) {
698 int i;
699
700 switch(mode) {
701 case SNAP_WORD:
702 /*
703 * Snap around if the word wraps around at the end or
704 * beginning of a line.
705 */
706 for(;;) {
707 if(direction < 0 && *x <= 0) {
708 if(*y > 0 && term.line[*y - 1][term.col-1].mode
709 & ATTR_WRAP) {
710 *y -= 1;
711 *x = term.col-1;
712 } else {
713 break;
714 }
715 }
716 if(direction > 0 && *x >= term.col-1) {
717 if(*y < term.row-1 && term.line[*y][*x].mode
718 & ATTR_WRAP) {
719 *y += 1;
720 *x = 0;
721 } else {
722 break;
723 }
724 }
725
726 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
727 *x += direction;
728 continue;
729 }
730
731 if(strchr(worddelimiters,
732 term.line[*y][*x+direction].c[0])) {
733 break;
734 }
735
736 *x += direction;
737 }
738 break;
739 case SNAP_LINE:
740 /*
741 * Snap around if the the previous line or the current one
742 * has set ATTR_WRAP at its end. Then the whole next or
743 * previous line will be selected.
744 */
745 *x = (direction < 0) ? 0 : term.col - 1;
746 if(direction < 0 && *y > 0) {
747 for(; *y > 0; *y += direction) {
748 if(!(term.line[*y-1][term.col-1].mode
749 & ATTR_WRAP)) {
750 break;
751 }
752 }
753 } else if(direction > 0 && *y < term.row-1) {
754 for(; *y < term.row; *y += direction) {
755 if(!(term.line[*y][term.col-1].mode
756 & ATTR_WRAP)) {
757 break;
758 }
759 }
760 }
761 break;
762 default:
763 /*
764 * Select the whole line when the end of line is reached.
765 */
766 if(direction > 0) {
767 i = term.col;
768 while(--i > 0 && term.line[*y][i].c[0] == ' ')
769 /* nothing */;
770 if(i > 0 && i < *x)
771 *x = term.col - 1;
772 }
773 break;
774 }
775 }
776
777 void
778 getbuttoninfo(XEvent *e) {
779 int type;
780 uint state = e->xbutton.state &~Button1Mask;
781
782 sel.alt = IS_SET(MODE_ALTSCREEN);
783
784 sel.oe.x = x2col(e->xbutton.x);
785 sel.oe.y = y2row(e->xbutton.y);
786
787 if(sel.ob.y < sel.oe.y
788 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
789 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
790 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
791 } else {
792 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
793 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
794 }
795 selsort();
796
797 sel.type = SEL_REGULAR;
798 for(type = 1; type < LEN(selmasks); ++type) {
799 if(match(selmasks[type], state)) {
800 sel.type = type;
801 break;
802 }
803 }
804 }
805
806 void
807 mousereport(XEvent *e) {
808 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
809 button = e->xbutton.button, state = e->xbutton.state,
810 len;
811 char buf[40];
812 static int ox, oy;
813
814 /* from urxvt */
815 if(e->xbutton.type == MotionNotify) {
816 if(x == ox && y == oy)
817 return;
818 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
819 return;
820 /* MOUSE_MOTION: no reporting if no button is pressed */
821 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
822 return;
823
824 button = oldbutton + 32;
825 ox = x;
826 oy = y;
827 } else {
828 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
829 button = 3;
830 } else {
831 button -= Button1;
832 if(button >= 3)
833 button += 64 - 3;
834 }
835 if(e->xbutton.type == ButtonPress) {
836 oldbutton = button;
837 ox = x;
838 oy = y;
839 } else if(e->xbutton.type == ButtonRelease) {
840 oldbutton = 3;
841 /* MODE_MOUSEX10: no button release reporting */
842 if(IS_SET(MODE_MOUSEX10))
843 return;
844 }
845 }
846
847 if(!IS_SET(MODE_MOUSEX10)) {
848 button += (state & ShiftMask ? 4 : 0)
849 + (state & Mod4Mask ? 8 : 0)
850 + (state & ControlMask ? 16 : 0);
851 }
852
853 len = 0;
854 if(IS_SET(MODE_MOUSESGR)) {
855 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
856 button, x+1, y+1,
857 e->xbutton.type == ButtonRelease ? 'm' : 'M');
858 } else if(x < 223 && y < 223) {
859 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
860 32+button, 32+x+1, 32+y+1);
861 } else {
862 return;
863 }
864
865 ttywrite(buf, len);
866 }
867
868 void
869 bpress(XEvent *e) {
870 struct timeval now;
871 Mousekey *mk;
872
873 if(IS_SET(MODE_MOUSE)) {
874 mousereport(e);
875 return;
876 }
877
878 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
879 if(e->xbutton.button == mk->b
880 && match(mk->mask, e->xbutton.state)) {
881 ttywrite(mk->s, strlen(mk->s));
882 if(IS_SET(MODE_ECHO))
883 techo(mk->s, strlen(mk->s));
884 return;
885 }
886 }
887
888 if(e->xbutton.button == Button1) {
889 gettimeofday(&now, NULL);
890
891 /* Clear previous selection, logically and visually. */
892 selclear(NULL);
893 sel.mode = 1;
894 sel.type = SEL_REGULAR;
895 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
896 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
897
898 /*
899 * If the user clicks below predefined timeouts specific
900 * snapping behaviour is exposed.
901 */
902 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
903 sel.snap = SNAP_LINE;
904 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
905 sel.snap = SNAP_WORD;
906 } else {
907 sel.snap = 0;
908 }
909 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
910 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
911 selsort();
912
913 /*
914 * Draw selection, unless it's regular and we don't want to
915 * make clicks visible
916 */
917 if(sel.snap != 0) {
918 sel.mode++;
919 tsetdirt(sel.nb.y, sel.ne.y);
920 }
921 sel.tclick2 = sel.tclick1;
922 sel.tclick1 = now;
923 }
924 }
925
926 void
927 selcopy(void) {
928 char *str, *ptr;
929 int x, y, bufsize, size, i, ex;
930 Glyph *gp, *last;
931
932 if(sel.ob.x == -1) {
933 str = NULL;
934 } else {
935 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
936 ptr = str = xmalloc(bufsize);
937
938 /* append every set & selected glyph to the selection */
939 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
940 gp = &term.line[y][0];
941 last = gp + term.col;
942
943 while(--last >= gp && !(selected(last - gp, y) && \
944 strcmp(last->c, " ") != 0))
945 /* nothing */;
946
947 for(x = 0; gp <= last; x++, ++gp) {
948 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
949 continue;
950
951 size = utf8size(gp->c);
952 memcpy(ptr, gp->c, size);
953 ptr += size;
954 }
955
956 /*
957 * Copy and pasting of line endings is inconsistent
958 * in the inconsistent terminal and GUI world.
959 * The best solution seems like to produce '\n' when
960 * something is copied from st and convert '\n' to
961 * '\r', when something to be pasted is received by
962 * st.
963 * FIXME: Fix the computer world.
964 */
965 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
966 *ptr++ = '\n';
967
968 /*
969 * If the last selected line expands in the selection
970 * after the visible text '\n' is appended.
971 */
972 if(y == sel.ne.y) {
973 i = term.col;
974 while(--i > 0 && term.line[y][i].c[0] == ' ')
975 /* nothing */;
976 ex = sel.ne.x;
977 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
978 ex = sel.nb.x;
979 if(i < ex)
980 *ptr++ = '\n';
981 }
982 }
983 *ptr = 0;
984 }
985 xsetsel(str);
986 }
987
988 void
989 selnotify(XEvent *e) {
990 ulong nitems, ofs, rem;
991 int format;
992 uchar *data, *last, *repl;
993 Atom type;
994
995 ofs = 0;
996 do {
997 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
998 False, AnyPropertyType, &type, &format,
999 &nitems, &rem, &data)) {
1000 fprintf(stderr, "Clipboard allocation failed\n");
1001 return;
1002 }
1003
1004 /*
1005 * As seen in selcopy:
1006 * Line endings are inconsistent in the terminal and GUI world
1007 * copy and pasting. When receiving some selection data,
1008 * replace all '\n' with '\r'.
1009 * FIXME: Fix the computer world.
1010 */
1011 repl = data;
1012 last = data + nitems * format / 8;
1013 while((repl = memchr(repl, '\n', last - repl))) {
1014 *repl++ = '\r';
1015 }
1016
1017 if(IS_SET(MODE_BRCKTPASTE))
1018 ttywrite("\033[200~", 6);
1019 ttywrite((const char *)data, nitems * format / 8);
1020 if(IS_SET(MODE_BRCKTPASTE))
1021 ttywrite("\033[201~", 6);
1022 XFree(data);
1023 /* number of 32-bit chunks returned */
1024 ofs += nitems * format / 32;
1025 } while(rem > 0);
1026 }
1027
1028 void
1029 selpaste(const Arg *dummy) {
1030 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1031 xw.win, CurrentTime);
1032 }
1033
1034 void
1035 clippaste(const Arg *dummy) {
1036 Atom clipboard;
1037
1038 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1039 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1040 xw.win, CurrentTime);
1041 }
1042
1043 void
1044 selclear(XEvent *e) {
1045 if(sel.ob.x == -1)
1046 return;
1047 sel.ob.x = -1;
1048 tsetdirt(sel.nb.y, sel.ne.y);
1049 }
1050
1051 void
1052 selrequest(XEvent *e) {
1053 XSelectionRequestEvent *xsre;
1054 XSelectionEvent xev;
1055 Atom xa_targets, string;
1056
1057 xsre = (XSelectionRequestEvent *) e;
1058 xev.type = SelectionNotify;
1059 xev.requestor = xsre->requestor;
1060 xev.selection = xsre->selection;
1061 xev.target = xsre->target;
1062 xev.time = xsre->time;
1063 /* reject */
1064 xev.property = None;
1065
1066 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1067 if(xsre->target == xa_targets) {
1068 /* respond with the supported type */
1069 string = sel.xtarget;
1070 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1071 XA_ATOM, 32, PropModeReplace,
1072 (uchar *) &string, 1);
1073 xev.property = xsre->property;
1074 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1075 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1076 xsre->target, 8, PropModeReplace,
1077 (uchar *) sel.clip, strlen(sel.clip));
1078 xev.property = xsre->property;
1079 }
1080
1081 /* all done, send a notification to the listener */
1082 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1083 fprintf(stderr, "Error sending SelectionNotify event\n");
1084 }
1085
1086 void
1087 xsetsel(char *str) {
1088 /* register the selection for both the clipboard and the primary */
1089 Atom clipboard;
1090
1091 free(sel.clip);
1092 sel.clip = str;
1093
1094 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1095
1096 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1097 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1098 }
1099
1100 void
1101 brelease(XEvent *e) {
1102 if(IS_SET(MODE_MOUSE)) {
1103 mousereport(e);
1104 return;
1105 }
1106
1107 if(e->xbutton.button == Button2) {
1108 selpaste(NULL);
1109 } else if(e->xbutton.button == Button1) {
1110 if(sel.mode < 2) {
1111 selclear(NULL);
1112 } else {
1113 getbuttoninfo(e);
1114 selcopy();
1115 }
1116 sel.mode = 0;
1117 tsetdirt(sel.nb.y, sel.ne.y);
1118 }
1119 }
1120
1121 void
1122 bmotion(XEvent *e) {
1123 int oldey, oldex, oldsby, oldsey;
1124
1125 if(IS_SET(MODE_MOUSE)) {
1126 mousereport(e);
1127 return;
1128 }
1129
1130 if(!sel.mode)
1131 return;
1132
1133 sel.mode++;
1134 oldey = sel.oe.y;
1135 oldex = sel.oe.x;
1136 oldsby = sel.nb.y;
1137 oldsey = sel.ne.y;
1138 getbuttoninfo(e);
1139
1140 if(oldey != sel.oe.y || oldex != sel.oe.x)
1141 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1142 }
1143
1144 void
1145 die(const char *errstr, ...) {
1146 va_list ap;
1147
1148 va_start(ap, errstr);
1149 vfprintf(stderr, errstr, ap);
1150 va_end(ap);
1151 exit(EXIT_FAILURE);
1152 }
1153
1154 void
1155 execsh(void) {
1156 char **args;
1157 char *envshell = getenv("SHELL");
1158 const struct passwd *pass = getpwuid(getuid());
1159 char buf[sizeof(long) * 8 + 1];
1160
1161 unsetenv("COLUMNS");
1162 unsetenv("LINES");
1163 unsetenv("TERMCAP");
1164
1165 if(pass) {
1166 setenv("LOGNAME", pass->pw_name, 1);
1167 setenv("USER", pass->pw_name, 1);
1168 setenv("SHELL", pass->pw_shell, 0);
1169 setenv("HOME", pass->pw_dir, 0);
1170 }
1171
1172 snprintf(buf, sizeof(buf), "%lu", xw.win);
1173 setenv("WINDOWID", buf, 1);
1174
1175 signal(SIGCHLD, SIG_DFL);
1176 signal(SIGHUP, SIG_DFL);
1177 signal(SIGINT, SIG_DFL);
1178 signal(SIGQUIT, SIG_DFL);
1179 signal(SIGTERM, SIG_DFL);
1180 signal(SIGALRM, SIG_DFL);
1181
1182 DEFAULT(envshell, shell);
1183 setenv("TERM", termname, 1);
1184 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1185 execvp(args[0], args);
1186 exit(EXIT_FAILURE);
1187 }
1188
1189 void
1190 sigchld(int a) {
1191 int stat = 0;
1192
1193 if(waitpid(pid, &stat, 0) < 0)
1194 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1195
1196 if(WIFEXITED(stat)) {
1197 exit(WEXITSTATUS(stat));
1198 } else {
1199 exit(EXIT_FAILURE);
1200 }
1201 }
1202
1203 void
1204 ttynew(void) {
1205 int m, s;
1206 struct winsize w = {term.row, term.col, 0, 0};
1207
1208 /* seems to work fine on linux, openbsd and freebsd */
1209 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1210 die("openpty failed: %s\n", SERRNO);
1211
1212 switch(pid = fork()) {
1213 case -1:
1214 die("fork failed\n");
1215 break;
1216 case 0:
1217 setsid(); /* create a new process group */
1218 dup2(s, STDIN_FILENO);
1219 dup2(s, STDOUT_FILENO);
1220 dup2(s, STDERR_FILENO);
1221 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1222 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1223 close(s);
1224 close(m);
1225 execsh();
1226 break;
1227 default:
1228 close(s);
1229 cmdfd = m;
1230 signal(SIGCHLD, sigchld);
1231 if(opt_io) {
1232 iofd = (!strcmp(opt_io, "-")) ?
1233 STDOUT_FILENO :
1234 open(opt_io, O_WRONLY | O_CREAT, 0666);
1235 if(iofd < 0) {
1236 fprintf(stderr, "Error opening %s:%s\n",
1237 opt_io, strerror(errno));
1238 }
1239 }
1240 }
1241 }
1242
1243 void
1244 dump(char c) {
1245 static int col;
1246
1247 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1248 if(++col % 10 == 0)
1249 fprintf(stderr, "\n");
1250 }
1251
1252 void
1253 ttyread(void) {
1254 static char buf[BUFSIZ];
1255 static int buflen = 0;
1256 char *ptr;
1257 char s[UTF_SIZ];
1258 int charsize; /* size of utf8 char in bytes */
1259 long utf8c;
1260 int ret;
1261
1262 /* append read bytes to unprocessed bytes */
1263 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1264 die("Couldn't read from shell: %s\n", SERRNO);
1265
1266 /* process every complete utf8 char */
1267 buflen += ret;
1268 ptr = buf;
1269 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1270 charsize = utf8decode(ptr, &utf8c);
1271 utf8encode(&utf8c, s);
1272 tputc(s, charsize);
1273 ptr += charsize;
1274 buflen -= charsize;
1275 }
1276
1277 /* keep any uncomplete utf8 char for the next call */
1278 memmove(buf, ptr, buflen);
1279 }
1280
1281 void
1282 ttywrite(const char *s, size_t n) {
1283 if(write(cmdfd, s, n) == -1)
1284 die("write error on tty: %s\n", SERRNO);
1285 }
1286
1287 void
1288 ttyresize(void) {
1289 struct winsize w;
1290
1291 w.ws_row = term.row;
1292 w.ws_col = term.col;
1293 w.ws_xpixel = xw.tw;
1294 w.ws_ypixel = xw.th;
1295 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1296 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1297 }
1298
1299 int
1300 tattrset(int attr) {
1301 int i, j;
1302
1303 for(i = 0; i < term.row-1; i++) {
1304 for(j = 0; j < term.col-1; j++) {
1305 if(term.line[i][j].mode & attr)
1306 return 1;
1307 }
1308 }
1309
1310 return 0;
1311 }
1312
1313 void
1314 tsetdirt(int top, int bot) {
1315 int i;
1316
1317 LIMIT(top, 0, term.row-1);
1318 LIMIT(bot, 0, term.row-1);
1319
1320 for(i = top; i <= bot; i++)
1321 term.dirty[i] = 1;
1322 }
1323
1324 void
1325 tsetdirtattr(int attr) {
1326 int i, j;
1327
1328 for(i = 0; i < term.row-1; i++) {
1329 for(j = 0; j < term.col-1; j++) {
1330 if(term.line[i][j].mode & attr) {
1331 tsetdirt(i, i);
1332 break;
1333 }
1334 }
1335 }
1336 }
1337
1338 void
1339 tfulldirt(void) {
1340 tsetdirt(0, term.row-1);
1341 }
1342
1343 void
1344 tcursor(int mode) {
1345 static TCursor c[2];
1346 bool alt = IS_SET(MODE_ALTSCREEN);
1347
1348 if(mode == CURSOR_SAVE) {
1349 c[alt] = term.c;
1350 } else if(mode == CURSOR_LOAD) {
1351 term.c = c[alt];
1352 tmoveto(c[alt].x, c[alt].y);
1353 }
1354 }
1355
1356 void
1357 treset(void) {
1358 uint i;
1359
1360 term.c = (TCursor){{
1361 .mode = ATTR_NULL,
1362 .fg = defaultfg,
1363 .bg = defaultbg
1364 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1365
1366 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1367 for(i = tabspaces; i < term.col; i += tabspaces)
1368 term.tabs[i] = 1;
1369 term.top = 0;
1370 term.bot = term.row - 1;
1371 term.mode = MODE_WRAP;
1372
1373 tclearregion(0, 0, term.col-1, term.row-1);
1374 tmoveto(0, 0);
1375 tcursor(CURSOR_SAVE);
1376 }
1377
1378 void
1379 tnew(int col, int row) {
1380 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1381 tresize(col, row);
1382 term.numlock = 1;
1383
1384 treset();
1385 }
1386
1387 void
1388 tswapscreen(void) {
1389 Line *tmp = term.line;
1390
1391 term.line = term.alt;
1392 term.alt = tmp;
1393 term.mode ^= MODE_ALTSCREEN;
1394 tfulldirt();
1395 }
1396
1397 void
1398 tscrolldown(int orig, int n) {
1399 int i;
1400 Line temp;
1401
1402 LIMIT(n, 0, term.bot-orig+1);
1403
1404 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1405
1406 for(i = term.bot; i >= orig+n; i--) {
1407 temp = term.line[i];
1408 term.line[i] = term.line[i-n];
1409 term.line[i-n] = temp;
1410
1411 term.dirty[i] = 1;
1412 term.dirty[i-n] = 1;
1413 }
1414
1415 selscroll(orig, n);
1416 }
1417
1418 void
1419 tscrollup(int orig, int n) {
1420 int i;
1421 Line temp;
1422 LIMIT(n, 0, term.bot-orig+1);
1423
1424 tclearregion(0, orig, term.col-1, orig+n-1);
1425
1426 for(i = orig; i <= term.bot-n; i++) {
1427 temp = term.line[i];
1428 term.line[i] = term.line[i+n];
1429 term.line[i+n] = temp;
1430
1431 term.dirty[i] = 1;
1432 term.dirty[i+n] = 1;
1433 }
1434
1435 selscroll(orig, -n);
1436 }
1437
1438 void
1439 selscroll(int orig, int n) {
1440 if(sel.ob.x == -1)
1441 return;
1442
1443 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1444 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1445 selclear(NULL);
1446 return;
1447 }
1448 if(sel.type == SEL_RECTANGULAR) {
1449 if(sel.ob.y < term.top)
1450 sel.ob.y = term.top;
1451 if(sel.oe.y > term.bot)
1452 sel.oe.y = term.bot;
1453 } else {
1454 if(sel.ob.y < term.top) {
1455 sel.ob.y = term.top;
1456 sel.ob.x = 0;
1457 }
1458 if(sel.oe.y > term.bot) {
1459 sel.oe.y = term.bot;
1460 sel.oe.x = term.col;
1461 }
1462 }
1463 selsort();
1464 }
1465 }
1466
1467 void
1468 tnewline(int first_col) {
1469 int y = term.c.y;
1470
1471 if(y == term.bot) {
1472 tscrollup(term.top, 1);
1473 } else {
1474 y++;
1475 }
1476 tmoveto(first_col ? 0 : term.c.x, y);
1477 }
1478
1479 void
1480 csiparse(void) {
1481 char *p = csiescseq.buf, *np;
1482 long int v;
1483
1484 csiescseq.narg = 0;
1485 if(*p == '?') {
1486 csiescseq.priv = 1;
1487 p++;
1488 }
1489
1490 csiescseq.buf[csiescseq.len] = '\0';
1491 while(p < csiescseq.buf+csiescseq.len) {
1492 np = NULL;
1493 v = strtol(p, &np, 10);
1494 if(np == p)
1495 v = 0;
1496 if(v == LONG_MAX || v == LONG_MIN)
1497 v = -1;
1498 csiescseq.arg[csiescseq.narg++] = v;
1499 p = np;
1500 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1501 break;
1502 p++;
1503 }
1504 csiescseq.mode = *p;
1505 }
1506
1507 /* for absolute user moves, when decom is set */
1508 void
1509 tmoveato(int x, int y) {
1510 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1511 }
1512
1513 void
1514 tmoveto(int x, int y) {
1515 int miny, maxy;
1516
1517 if(term.c.state & CURSOR_ORIGIN) {
1518 miny = term.top;
1519 maxy = term.bot;
1520 } else {
1521 miny = 0;
1522 maxy = term.row - 1;
1523 }
1524 LIMIT(x, 0, term.col-1);
1525 LIMIT(y, miny, maxy);
1526 term.c.state &= ~CURSOR_WRAPNEXT;
1527 term.c.x = x;
1528 term.c.y = y;
1529 }
1530
1531 void
1532 tsetchar(char *c, Glyph *attr, int x, int y) {
1533 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1534 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1535 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1536 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1537 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1538 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1539 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1540 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1541 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1542 };
1543
1544 /*
1545 * The table is proudly stolen from rxvt.
1546 */
1547 if(attr->mode & ATTR_GFX) {
1548 if(c[0] >= 0x41 && c[0] <= 0x7e
1549 && vt100_0[c[0] - 0x41]) {
1550 c = vt100_0[c[0] - 0x41];
1551 }
1552 }
1553
1554 if(term.line[y][x].mode & ATTR_WIDE) {
1555 if(x+1 < term.col) {
1556 term.line[y][x+1].c[0] = ' ';
1557 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1558 }
1559 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1560 term.line[y][x-1].c[0] = ' ';
1561 term.line[y][x-1].mode &= ~ATTR_WIDE;
1562 }
1563
1564 term.dirty[y] = 1;
1565 term.line[y][x] = *attr;
1566 memcpy(term.line[y][x].c, c, UTF_SIZ);
1567 }
1568
1569 void
1570 tclearregion(int x1, int y1, int x2, int y2) {
1571 int x, y, temp;
1572
1573 if(x1 > x2)
1574 temp = x1, x1 = x2, x2 = temp;
1575 if(y1 > y2)
1576 temp = y1, y1 = y2, y2 = temp;
1577
1578 LIMIT(x1, 0, term.col-1);
1579 LIMIT(x2, 0, term.col-1);
1580 LIMIT(y1, 0, term.row-1);
1581 LIMIT(y2, 0, term.row-1);
1582
1583 for(y = y1; y <= y2; y++) {
1584 term.dirty[y] = 1;
1585 for(x = x1; x <= x2; x++) {
1586 if(selected(x, y))
1587 selclear(NULL);
1588 term.line[y][x] = term.c.attr;
1589 memcpy(term.line[y][x].c, " ", 2);
1590 }
1591 }
1592 }
1593
1594 void
1595 tdeletechar(int n) {
1596 int src = term.c.x + n;
1597 int dst = term.c.x;
1598 int size = term.col - src;
1599
1600 term.dirty[term.c.y] = 1;
1601
1602 if(src >= term.col) {
1603 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1604 return;
1605 }
1606
1607 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1608 size * sizeof(Glyph));
1609 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1610 }
1611
1612 void
1613 tinsertblank(int n) {
1614 int src = term.c.x;
1615 int dst = src + n;
1616 int size = term.col - dst;
1617
1618 term.dirty[term.c.y] = 1;
1619
1620 if(dst >= term.col) {
1621 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1622 return;
1623 }
1624
1625 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1626 size * sizeof(Glyph));
1627 tclearregion(src, term.c.y, dst - 1, term.c.y);
1628 }
1629
1630 void
1631 tinsertblankline(int n) {
1632 if(term.c.y < term.top || term.c.y > term.bot)
1633 return;
1634
1635 tscrolldown(term.c.y, n);
1636 }
1637
1638 void
1639 tdeleteline(int n) {
1640 if(term.c.y < term.top || term.c.y > term.bot)
1641 return;
1642
1643 tscrollup(term.c.y, n);
1644 }
1645
1646 long
1647 tdefcolor(int *attr, int *npar, int l) {
1648 long idx = -1;
1649 uint r, g, b;
1650
1651 switch (attr[*npar + 1]) {
1652 case 2: /* direct colour in RGB space */
1653 if (*npar + 4 >= l) {
1654 fprintf(stderr,
1655 "erresc(38): Incorrect number of parameters (%d)\n",
1656 *npar);
1657 break;
1658 }
1659 r = attr[*npar + 2];
1660 g = attr[*npar + 3];
1661 b = attr[*npar + 4];
1662 *npar += 4;
1663 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1664 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1665 r, g, b);
1666 else
1667 idx = TRUECOLOR(r, g, b);
1668 break;
1669 case 5: /* indexed colour */
1670 if (*npar + 2 >= l) {
1671 fprintf(stderr,
1672 "erresc(38): Incorrect number of parameters (%d)\n",
1673 *npar);
1674 break;
1675 }
1676 *npar += 2;
1677 if(!BETWEEN(attr[*npar], 0, 255))
1678 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1679 else
1680 idx = attr[*npar];
1681 break;
1682 case 0: /* implemented defined (only foreground) */
1683 case 1: /* transparent */
1684 case 3: /* direct colour in CMY space */
1685 case 4: /* direct colour in CMYK space */
1686 default:
1687 fprintf(stderr,
1688 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1689 }
1690
1691 return idx;
1692 }
1693
1694 void
1695 tsetattr(int *attr, int l) {
1696 int i;
1697 long idx;
1698
1699 for(i = 0; i < l; i++) {
1700 switch(attr[i]) {
1701 case 0:
1702 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1703 | ATTR_BOLD | ATTR_ITALIC \
1704 | ATTR_BLINK);
1705 term.c.attr.fg = defaultfg;
1706 term.c.attr.bg = defaultbg;
1707 break;
1708 case 1:
1709 term.c.attr.mode |= ATTR_BOLD;
1710 break;
1711 case 3:
1712 term.c.attr.mode |= ATTR_ITALIC;
1713 break;
1714 case 4:
1715 term.c.attr.mode |= ATTR_UNDERLINE;
1716 break;
1717 case 5: /* slow blink */
1718 case 6: /* rapid blink */
1719 term.c.attr.mode |= ATTR_BLINK;
1720 break;
1721 case 7:
1722 term.c.attr.mode |= ATTR_REVERSE;
1723 break;
1724 case 21:
1725 case 22:
1726 term.c.attr.mode &= ~ATTR_BOLD;
1727 break;
1728 case 23:
1729 term.c.attr.mode &= ~ATTR_ITALIC;
1730 break;
1731 case 24:
1732 term.c.attr.mode &= ~ATTR_UNDERLINE;
1733 break;
1734 case 25:
1735 case 26:
1736 term.c.attr.mode &= ~ATTR_BLINK;
1737 break;
1738 case 27:
1739 term.c.attr.mode &= ~ATTR_REVERSE;
1740 break;
1741 case 38:
1742 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1743 term.c.attr.fg = idx;
1744 break;
1745 case 39:
1746 term.c.attr.fg = defaultfg;
1747 break;
1748 case 48:
1749 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1750 term.c.attr.bg = idx;
1751 break;
1752 case 49:
1753 term.c.attr.bg = defaultbg;
1754 break;
1755 default:
1756 if(BETWEEN(attr[i], 30, 37)) {
1757 term.c.attr.fg = attr[i] - 30;
1758 } else if(BETWEEN(attr[i], 40, 47)) {
1759 term.c.attr.bg = attr[i] - 40;
1760 } else if(BETWEEN(attr[i], 90, 97)) {
1761 term.c.attr.fg = attr[i] - 90 + 8;
1762 } else if(BETWEEN(attr[i], 100, 107)) {
1763 term.c.attr.bg = attr[i] - 100 + 8;
1764 } else {
1765 fprintf(stderr,
1766 "erresc(default): gfx attr %d unknown\n",
1767 attr[i]), csidump();
1768 }
1769 break;
1770 }
1771 }
1772 }
1773
1774 void
1775 tsetscroll(int t, int b) {
1776 int temp;
1777
1778 LIMIT(t, 0, term.row-1);
1779 LIMIT(b, 0, term.row-1);
1780 if(t > b) {
1781 temp = t;
1782 t = b;
1783 b = temp;
1784 }
1785 term.top = t;
1786 term.bot = b;
1787 }
1788
1789 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1790
1791 void
1792 tsetmode(bool priv, bool set, int *args, int narg) {
1793 int *lim, mode;
1794 bool alt;
1795
1796 for(lim = args + narg; args < lim; ++args) {
1797 if(priv) {
1798 switch(*args) {
1799 break;
1800 case 1: /* DECCKM -- Cursor key */
1801 MODBIT(term.mode, set, MODE_APPCURSOR);
1802 break;
1803 case 5: /* DECSCNM -- Reverse video */
1804 mode = term.mode;
1805 MODBIT(term.mode, set, MODE_REVERSE);
1806 if(mode != term.mode)
1807 redraw(REDRAW_TIMEOUT);
1808 break;
1809 case 6: /* DECOM -- Origin */
1810 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1811 tmoveato(0, 0);
1812 break;
1813 case 7: /* DECAWM -- Auto wrap */
1814 MODBIT(term.mode, set, MODE_WRAP);
1815 break;
1816 case 0: /* Error (IGNORED) */
1817 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1818 case 3: /* DECCOLM -- Column (IGNORED) */
1819 case 4: /* DECSCLM -- Scroll (IGNORED) */
1820 case 8: /* DECARM -- Auto repeat (IGNORED) */
1821 case 18: /* DECPFF -- Printer feed (IGNORED) */
1822 case 19: /* DECPEX -- Printer extent (IGNORED) */
1823 case 42: /* DECNRCM -- National characters (IGNORED) */
1824 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1825 break;
1826 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1827 MODBIT(term.mode, !set, MODE_HIDE);
1828 break;
1829 case 9: /* X10 mouse compatibility mode */
1830 xsetpointermotion(0);
1831 MODBIT(term.mode, 0, MODE_MOUSE);
1832 MODBIT(term.mode, set, MODE_MOUSEX10);
1833 break;
1834 case 1000: /* 1000: report button press */
1835 xsetpointermotion(0);
1836 MODBIT(term.mode, 0, MODE_MOUSE);
1837 MODBIT(term.mode, set, MODE_MOUSEBTN);
1838 break;
1839 case 1002: /* 1002: report motion on button press */
1840 xsetpointermotion(0);
1841 MODBIT(term.mode, 0, MODE_MOUSE);
1842 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1843 break;
1844 case 1003: /* 1003: enable all mouse motions */
1845 xsetpointermotion(set);
1846 MODBIT(term.mode, 0, MODE_MOUSE);
1847 MODBIT(term.mode, set, MODE_MOUSEMANY);
1848 break;
1849 case 1004: /* 1004: send focus events to tty */
1850 MODBIT(term.mode, set, MODE_FOCUS);
1851 break;
1852 case 1006: /* 1006: extended reporting mode */
1853 MODBIT(term.mode, set, MODE_MOUSESGR);
1854 break;
1855 case 1034:
1856 MODBIT(term.mode, set, MODE_8BIT);
1857 break;
1858 case 1049: /* swap screen & set/restore cursor as xterm */
1859 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1860 case 47: /* swap screen */
1861 case 1047:
1862 if (!allowaltscreen)
1863 break;
1864 alt = IS_SET(MODE_ALTSCREEN);
1865 if(alt) {
1866 tclearregion(0, 0, term.col-1,
1867 term.row-1);
1868 }
1869 if(set ^ alt) /* set is always 1 or 0 */
1870 tswapscreen();
1871 if(*args != 1049)
1872 break;
1873 /* FALLTRU */
1874 case 1048:
1875 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1876 break;
1877 case 2004: /* 2004: bracketed paste mode */
1878 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1879 break;
1880 /* Not implemented mouse modes. See comments there. */
1881 case 1001: /* mouse highlight mode; can hang the
1882 terminal by design when implemented. */
1883 case 1005: /* UTF-8 mouse mode; will confuse
1884 applications not supporting UTF-8
1885 and luit. */
1886 case 1015: /* urxvt mangled mouse mode; incompatible
1887 and can be mistaken for other control
1888 codes. */
1889 default:
1890 fprintf(stderr,
1891 "erresc: unknown private set/reset mode %d\n",
1892 *args);
1893 break;
1894 }
1895 } else {
1896 switch(*args) {
1897 case 0: /* Error (IGNORED) */
1898 break;
1899 case 2: /* KAM -- keyboard action */
1900 MODBIT(term.mode, set, MODE_KBDLOCK);
1901 break;
1902 case 4: /* IRM -- Insertion-replacement */
1903 MODBIT(term.mode, set, MODE_INSERT);
1904 break;
1905 case 12: /* SRM -- Send/Receive */
1906 MODBIT(term.mode, !set, MODE_ECHO);
1907 break;
1908 case 20: /* LNM -- Linefeed/new line */
1909 MODBIT(term.mode, set, MODE_CRLF);
1910 break;
1911 default:
1912 fprintf(stderr,
1913 "erresc: unknown set/reset mode %d\n",
1914 *args);
1915 break;
1916 }
1917 }
1918 }
1919 }
1920
1921 void
1922 csihandle(void) {
1923 switch(csiescseq.mode) {
1924 default:
1925 unknown:
1926 fprintf(stderr, "erresc: unknown csi ");
1927 csidump();
1928 /* die(""); */
1929 break;
1930 case '@': /* ICH -- Insert <n> blank char */
1931 DEFAULT(csiescseq.arg[0], 1);
1932 tinsertblank(csiescseq.arg[0]);
1933 break;
1934 case 'A': /* CUU -- Cursor <n> Up */
1935 DEFAULT(csiescseq.arg[0], 1);
1936 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1937 break;
1938 case 'B': /* CUD -- Cursor <n> Down */
1939 case 'e': /* VPR --Cursor <n> Down */
1940 DEFAULT(csiescseq.arg[0], 1);
1941 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1942 break;
1943 case 'c': /* DA -- Device Attributes */
1944 if(csiescseq.arg[0] == 0)
1945 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1946 break;
1947 case 'C': /* CUF -- Cursor <n> Forward */
1948 case 'a': /* HPR -- Cursor <n> Forward */
1949 DEFAULT(csiescseq.arg[0], 1);
1950 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1951 break;
1952 case 'D': /* CUB -- Cursor <n> Backward */
1953 DEFAULT(csiescseq.arg[0], 1);
1954 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1955 break;
1956 case 'E': /* CNL -- Cursor <n> Down and first col */
1957 DEFAULT(csiescseq.arg[0], 1);
1958 tmoveto(0, term.c.y+csiescseq.arg[0]);
1959 break;
1960 case 'F': /* CPL -- Cursor <n> Up and first col */
1961 DEFAULT(csiescseq.arg[0], 1);
1962 tmoveto(0, term.c.y-csiescseq.arg[0]);
1963 break;
1964 case 'g': /* TBC -- Tabulation clear */
1965 switch(csiescseq.arg[0]) {
1966 case 0: /* clear current tab stop */
1967 term.tabs[term.c.x] = 0;
1968 break;
1969 case 3: /* clear all the tabs */
1970 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1971 break;
1972 default:
1973 goto unknown;
1974 }
1975 break;
1976 case 'G': /* CHA -- Move to <col> */
1977 case '`': /* HPA */
1978 DEFAULT(csiescseq.arg[0], 1);
1979 tmoveto(csiescseq.arg[0]-1, term.c.y);
1980 break;
1981 case 'H': /* CUP -- Move to <row> <col> */
1982 case 'f': /* HVP */
1983 DEFAULT(csiescseq.arg[0], 1);
1984 DEFAULT(csiescseq.arg[1], 1);
1985 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1986 break;
1987 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1988 DEFAULT(csiescseq.arg[0], 1);
1989 while(csiescseq.arg[0]--)
1990 tputtab(1);
1991 break;
1992 case 'J': /* ED -- Clear screen */
1993 selclear(NULL);
1994 switch(csiescseq.arg[0]) {
1995 case 0: /* below */
1996 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1997 if(term.c.y < term.row-1) {
1998 tclearregion(0, term.c.y+1, term.col-1,
1999 term.row-1);
2000 }
2001 break;
2002 case 1: /* above */
2003 if(term.c.y > 1)
2004 tclearregion(0, 0, term.col-1, term.c.y-1);
2005 tclearregion(0, term.c.y, term.c.x, term.c.y);
2006 break;
2007 case 2: /* all */
2008 tclearregion(0, 0, term.col-1, term.row-1);
2009 break;
2010 default:
2011 goto unknown;
2012 }
2013 break;
2014 case 'K': /* EL -- Clear line */
2015 switch(csiescseq.arg[0]) {
2016 case 0: /* right */
2017 tclearregion(term.c.x, term.c.y, term.col-1,
2018 term.c.y);
2019 break;
2020 case 1: /* left */
2021 tclearregion(0, term.c.y, term.c.x, term.c.y);
2022 break;
2023 case 2: /* all */
2024 tclearregion(0, term.c.y, term.col-1, term.c.y);
2025 break;
2026 }
2027 break;
2028 case 'S': /* SU -- Scroll <n> line up */
2029 DEFAULT(csiescseq.arg[0], 1);
2030 tscrollup(term.top, csiescseq.arg[0]);
2031 break;
2032 case 'T': /* SD -- Scroll <n> line down */
2033 DEFAULT(csiescseq.arg[0], 1);
2034 tscrolldown(term.top, csiescseq.arg[0]);
2035 break;
2036 case 'L': /* IL -- Insert <n> blank lines */
2037 DEFAULT(csiescseq.arg[0], 1);
2038 tinsertblankline(csiescseq.arg[0]);
2039 break;
2040 case 'l': /* RM -- Reset Mode */
2041 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2042 break;
2043 case 'M': /* DL -- Delete <n> lines */
2044 DEFAULT(csiescseq.arg[0], 1);
2045 tdeleteline(csiescseq.arg[0]);
2046 break;
2047 case 'X': /* ECH -- Erase <n> char */
2048 DEFAULT(csiescseq.arg[0], 1);
2049 tclearregion(term.c.x, term.c.y,
2050 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2051 break;
2052 case 'P': /* DCH -- Delete <n> char */
2053 DEFAULT(csiescseq.arg[0], 1);
2054 tdeletechar(csiescseq.arg[0]);
2055 break;
2056 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2057 DEFAULT(csiescseq.arg[0], 1);
2058 while(csiescseq.arg[0]--)
2059 tputtab(0);
2060 break;
2061 case 'd': /* VPA -- Move to <row> */
2062 DEFAULT(csiescseq.arg[0], 1);
2063 tmoveato(term.c.x, csiescseq.arg[0]-1);
2064 break;
2065 case 'h': /* SM -- Set terminal mode */
2066 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2067 break;
2068 case 'm': /* SGR -- Terminal attribute (color) */
2069 tsetattr(csiescseq.arg, csiescseq.narg);
2070 break;
2071 case 'n': /* DSR – Device Status Report (cursor position) */
2072 if (csiescseq.arg[0] == 6) {
2073 char buf[40];
2074 int len = snprintf(buf, sizeof(buf),"\033[%i;%iR", term.c.y+1, term.c.x+1);
2075 ttywrite(buf, len);
2076 break;
2077 }
2078 case 'r': /* DECSTBM -- Set Scrolling Region */
2079 if(csiescseq.priv) {
2080 goto unknown;
2081 } else {
2082 DEFAULT(csiescseq.arg[0], 1);
2083 DEFAULT(csiescseq.arg[1], term.row);
2084 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2085 tmoveato(0, 0);
2086 }
2087 break;
2088 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2089 tcursor(CURSOR_SAVE);
2090 break;
2091 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2092 tcursor(CURSOR_LOAD);
2093 break;
2094 }
2095 }
2096
2097 void
2098 csidump(void) {
2099 int i;
2100 uint c;
2101
2102 printf("ESC[");
2103 for(i = 0; i < csiescseq.len; i++) {
2104 c = csiescseq.buf[i] & 0xff;
2105 if(isprint(c)) {
2106 putchar(c);
2107 } else if(c == '\n') {
2108 printf("(\\n)");
2109 } else if(c == '\r') {
2110 printf("(\\r)");
2111 } else if(c == 0x1b) {
2112 printf("(\\e)");
2113 } else {
2114 printf("(%02x)", c);
2115 }
2116 }
2117 putchar('\n');
2118 }
2119
2120 void
2121 csireset(void) {
2122 memset(&csiescseq, 0, sizeof(csiescseq));
2123 }
2124
2125 void
2126 strhandle(void) {
2127 char *p = NULL;
2128 int i, j, narg;
2129
2130 strparse();
2131 narg = strescseq.narg;
2132
2133 switch(strescseq.type) {
2134 case ']': /* OSC -- Operating System Command */
2135 switch(i = atoi(strescseq.args[0])) {
2136 case 0:
2137 case 1:
2138 case 2:
2139 if(narg > 1)
2140 xsettitle(strescseq.args[1]);
2141 break;
2142 case 4: /* color set */
2143 if(narg < 3)
2144 break;
2145 p = strescseq.args[2];
2146 /* fall through */
2147 case 104: /* color reset, here p = NULL */
2148 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2149 if (!xsetcolorname(j, p)) {
2150 fprintf(stderr, "erresc: invalid color %s\n", p);
2151 } else {
2152 /*
2153 * TODO if defaultbg color is changed, borders
2154 * are dirty
2155 */
2156 redraw(0);
2157 }
2158 break;
2159 default:
2160 fprintf(stderr, "erresc: unknown str ");
2161 strdump();
2162 break;
2163 }
2164 break;
2165 case 'k': /* old title set compatibility */
2166 xsettitle(strescseq.args[0]);
2167 break;
2168 case 'P': /* DSC -- Device Control String */
2169 case '_': /* APC -- Application Program Command */
2170 case '^': /* PM -- Privacy Message */
2171 default:
2172 fprintf(stderr, "erresc: unknown str ");
2173 strdump();
2174 /* die(""); */
2175 break;
2176 }
2177 }
2178
2179 void
2180 strparse(void) {
2181 char *p = strescseq.buf;
2182
2183 strescseq.narg = 0;
2184 strescseq.buf[strescseq.len] = '\0';
2185 while(p && strescseq.narg < STR_ARG_SIZ)
2186 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2187 }
2188
2189 void
2190 strdump(void) {
2191 int i;
2192 uint c;
2193
2194 printf("ESC%c", strescseq.type);
2195 for(i = 0; i < strescseq.len; i++) {
2196 c = strescseq.buf[i] & 0xff;
2197 if(c == '\0') {
2198 return;
2199 } else if(isprint(c)) {
2200 putchar(c);
2201 } else if(c == '\n') {
2202 printf("(\\n)");
2203 } else if(c == '\r') {
2204 printf("(\\r)");
2205 } else if(c == 0x1b) {
2206 printf("(\\e)");
2207 } else {
2208 printf("(%02x)", c);
2209 }
2210 }
2211 printf("ESC\\\n");
2212 }
2213
2214 void
2215 strreset(void) {
2216 memset(&strescseq, 0, sizeof(strescseq));
2217 }
2218
2219 void
2220 tputtab(bool forward) {
2221 uint x = term.c.x;
2222
2223 if(forward) {
2224 if(x == term.col)
2225 return;
2226 for(++x; x < term.col && !term.tabs[x]; ++x)
2227 /* nothing */ ;
2228 } else {
2229 if(x == 0)
2230 return;
2231 for(--x; x > 0 && !term.tabs[x]; --x)
2232 /* nothing */ ;
2233 }
2234 tmoveto(x, term.c.y);
2235 }
2236
2237 void
2238 techo(char *buf, int len) {
2239 for(; len > 0; buf++, len--) {
2240 char c = *buf;
2241
2242 if(c == '\033') { /* escape */
2243 tputc("^", 1);
2244 tputc("[", 1);
2245 } else if(c < '\x20') { /* control code */
2246 if(c != '\n' && c != '\r' && c != '\t') {
2247 c |= '\x40';
2248 tputc("^", 1);
2249 }
2250 tputc(&c, 1);
2251 } else {
2252 break;
2253 }
2254 }
2255 if(len)
2256 tputc(buf, len);
2257 }
2258
2259 void
2260 tputc(char *c, int len) {
2261 uchar ascii = *c;
2262 bool control = ascii < '\x20' || ascii == 0177;
2263 long u8char;
2264 int width;
2265
2266 if(len == 1) {
2267 width = 1;
2268 } else {
2269 utf8decode(c, &u8char);
2270 width = wcwidth(u8char);
2271 }
2272
2273 if(iofd != -1) {
2274 if(xwrite(iofd, c, len) < 0) {
2275 fprintf(stderr, "Error writing in %s:%s\n",
2276 opt_io, strerror(errno));
2277 close(iofd);
2278 iofd = -1;
2279 }
2280 }
2281
2282 /*
2283 * STR sequences must be checked before anything else
2284 * because it can use some control codes as part of the sequence.
2285 */
2286 if(term.esc & ESC_STR) {
2287 switch(ascii) {
2288 case '\033':
2289 term.esc = ESC_START | ESC_STR_END;
2290 break;
2291 case '\a': /* backwards compatibility to xterm */
2292 term.esc = 0;
2293 strhandle();
2294 break;
2295 default:
2296 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2297 memmove(&strescseq.buf[strescseq.len], c, len);
2298 strescseq.len += len;
2299 } else {
2300 /*
2301 * Here is a bug in terminals. If the user never sends
2302 * some code to stop the str or esc command, then st
2303 * will stop responding. But this is better than
2304 * silently failing with unknown characters. At least
2305 * then users will report back.
2306 *
2307 * In the case users ever get fixed, here is the code:
2308 */
2309 /*
2310 * term.esc = 0;
2311 * strhandle();
2312 */
2313 }
2314 }
2315 return;
2316 }
2317
2318 /*
2319 * Actions of control codes must be performed as soon they arrive
2320 * because they can be embedded inside a control sequence, and
2321 * they must not cause conflicts with sequences.
2322 */
2323 if(control) {
2324 switch(ascii) {
2325 case '\t': /* HT */
2326 tputtab(1);
2327 return;
2328 case '\b': /* BS */
2329 tmoveto(term.c.x-1, term.c.y);
2330 return;
2331 case '\r': /* CR */
2332 tmoveto(0, term.c.y);
2333 return;
2334 case '\f': /* LF */
2335 case '\v': /* VT */
2336 case '\n': /* LF */
2337 /* go to first col if the mode is set */
2338 tnewline(IS_SET(MODE_CRLF));
2339 return;
2340 case '\a': /* BEL */
2341 if(!(xw.state & WIN_FOCUSED))
2342 xseturgency(1);
2343 if (bellvolume)
2344 XBell(xw.dpy, bellvolume);
2345 return;
2346 case '\033': /* ESC */
2347 csireset();
2348 term.esc = ESC_START;
2349 return;
2350 case '\016': /* SO */
2351 case '\017': /* SI */
2352 /*
2353 * Different charsets are hard to handle. Applications
2354 * should use the right alt charset escapes for the
2355 * only reason they still exist: line drawing. The
2356 * rest is incompatible history st should not support.
2357 */
2358 return;
2359 case '\032': /* SUB */
2360 case '\030': /* CAN */
2361 csireset();
2362 return;
2363 case '\005': /* ENQ (IGNORED) */
2364 case '\000': /* NUL (IGNORED) */
2365 case '\021': /* XON (IGNORED) */
2366 case '\023': /* XOFF (IGNORED) */
2367 case 0177: /* DEL (IGNORED) */
2368 return;
2369 }
2370 } else if(term.esc & ESC_START) {
2371 if(term.esc & ESC_CSI) {
2372 csiescseq.buf[csiescseq.len++] = ascii;
2373 if(BETWEEN(ascii, 0x40, 0x7E)
2374 || csiescseq.len >= \
2375 sizeof(csiescseq.buf)-1) {
2376 term.esc = 0;
2377 csiparse();
2378 csihandle();
2379 }
2380 } else if(term.esc & ESC_STR_END) {
2381 term.esc = 0;
2382 if(ascii == '\\')
2383 strhandle();
2384 } else if(term.esc & ESC_ALTCHARSET) {
2385 switch(ascii) {
2386 case '0': /* Line drawing set */
2387 term.c.attr.mode |= ATTR_GFX;
2388 break;
2389 case 'B': /* USASCII */
2390 term.c.attr.mode &= ~ATTR_GFX;
2391 break;
2392 case 'A': /* UK (IGNORED) */
2393 case '<': /* multinational charset (IGNORED) */
2394 case '5': /* Finnish (IGNORED) */
2395 case 'C': /* Finnish (IGNORED) */
2396 case 'K': /* German (IGNORED) */
2397 break;
2398 default:
2399 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2400 }
2401 term.esc = 0;
2402 } else if(term.esc & ESC_TEST) {
2403 if(ascii == '8') { /* DEC screen alignment test. */
2404 char E[UTF_SIZ] = "E";
2405 int x, y;
2406
2407 for(x = 0; x < term.col; ++x) {
2408 for(y = 0; y < term.row; ++y)
2409 tsetchar(E, &term.c.attr, x, y);
2410 }
2411 }
2412 term.esc = 0;
2413 } else {
2414 switch(ascii) {
2415 case '[':
2416 term.esc |= ESC_CSI;
2417 break;
2418 case '#':
2419 term.esc |= ESC_TEST;
2420 break;
2421 case 'P': /* DCS -- Device Control String */
2422 case '_': /* APC -- Application Program Command */
2423 case '^': /* PM -- Privacy Message */
2424 case ']': /* OSC -- Operating System Command */
2425 case 'k': /* old title set compatibility */
2426 strreset();
2427 strescseq.type = ascii;
2428 term.esc |= ESC_STR;
2429 break;
2430 case '(': /* set primary charset G0 */
2431 term.esc |= ESC_ALTCHARSET;
2432 break;
2433 case ')': /* set secondary charset G1 (IGNORED) */
2434 case '*': /* set tertiary charset G2 (IGNORED) */
2435 case '+': /* set quaternary charset G3 (IGNORED) */
2436 term.esc = 0;
2437 break;
2438 case 'D': /* IND -- Linefeed */
2439 if(term.c.y == term.bot) {
2440 tscrollup(term.top, 1);
2441 } else {
2442 tmoveto(term.c.x, term.c.y+1);
2443 }
2444 term.esc = 0;
2445 break;
2446 case 'E': /* NEL -- Next line */
2447 tnewline(1); /* always go to first col */
2448 term.esc = 0;
2449 break;
2450 case 'H': /* HTS -- Horizontal tab stop */
2451 term.tabs[term.c.x] = 1;
2452 term.esc = 0;
2453 break;
2454 case 'M': /* RI -- Reverse index */
2455 if(term.c.y == term.top) {
2456 tscrolldown(term.top, 1);
2457 } else {
2458 tmoveto(term.c.x, term.c.y-1);
2459 }
2460 term.esc = 0;
2461 break;
2462 case 'Z': /* DECID -- Identify Terminal */
2463 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2464 term.esc = 0;
2465 break;
2466 case 'c': /* RIS -- Reset to inital state */
2467 treset();
2468 term.esc = 0;
2469 xresettitle();
2470 xloadcols();
2471 break;
2472 case '=': /* DECPAM -- Application keypad */
2473 term.mode |= MODE_APPKEYPAD;
2474 term.esc = 0;
2475 break;
2476 case '>': /* DECPNM -- Normal keypad */
2477 term.mode &= ~MODE_APPKEYPAD;
2478 term.esc = 0;
2479 break;
2480 case '7': /* DECSC -- Save Cursor */
2481 tcursor(CURSOR_SAVE);
2482 term.esc = 0;
2483 break;
2484 case '8': /* DECRC -- Restore Cursor */
2485 tcursor(CURSOR_LOAD);
2486 term.esc = 0;
2487 break;
2488 case '\\': /* ST -- Stop */
2489 term.esc = 0;
2490 break;
2491 default:
2492 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2493 (uchar) ascii, isprint(ascii)? ascii:'.');
2494 term.esc = 0;
2495 }
2496 }
2497 /*
2498 * All characters which form part of a sequence are not
2499 * printed
2500 */
2501 return;
2502 }
2503 /*
2504 * Display control codes only if we are in graphic mode
2505 */
2506 if(control && !(term.c.attr.mode & ATTR_GFX))
2507 return;
2508 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2509 selclear(NULL);
2510 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2511 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2512 tnewline(1);
2513 }
2514
2515 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2516 memmove(&term.line[term.c.y][term.c.x+1],
2517 &term.line[term.c.y][term.c.x],
2518 (term.col - term.c.x - 1) * sizeof(Glyph));
2519 }
2520
2521 if(term.c.x+width > term.col)
2522 tnewline(1);
2523
2524 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2525
2526 if(width == 2) {
2527 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2528 if(term.c.x+1 < term.col) {
2529 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2530 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2531 }
2532 }
2533 if(term.c.x+width < term.col) {
2534 tmoveto(term.c.x+width, term.c.y);
2535 } else {
2536 term.c.state |= CURSOR_WRAPNEXT;
2537 }
2538 }
2539
2540 int
2541 tresize(int col, int row) {
2542 int i;
2543 int minrow = MIN(row, term.row);
2544 int mincol = MIN(col, term.col);
2545 int slide = term.c.y - row + 1;
2546 bool *bp;
2547 Line *orig;
2548
2549 if(col < 1 || row < 1)
2550 return 0;
2551
2552 /* free unneeded rows */
2553 i = 0;
2554 if(slide > 0) {
2555 /*
2556 * slide screen to keep cursor where we expect it -
2557 * tscrollup would work here, but we can optimize to
2558 * memmove because we're freeing the earlier lines
2559 */
2560 for(/* i = 0 */; i < slide; i++) {
2561 free(term.line[i]);
2562 free(term.alt[i]);
2563 }
2564 memmove(term.line, term.line + slide, row * sizeof(Line));
2565 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2566 }
2567 for(i += row; i < term.row; i++) {
2568 free(term.line[i]);
2569 free(term.alt[i]);
2570 }
2571
2572 /* resize to new height */
2573 term.line = xrealloc(term.line, row * sizeof(Line));
2574 term.alt = xrealloc(term.alt, row * sizeof(Line));
2575 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2576 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2577
2578 /* resize each row to new width, zero-pad if needed */
2579 for(i = 0; i < minrow; i++) {
2580 term.dirty[i] = 1;
2581 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2582 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2583 }
2584
2585 /* allocate any new rows */
2586 for(/* i == minrow */; i < row; i++) {
2587 term.dirty[i] = 1;
2588 term.line[i] = xmalloc(col * sizeof(Glyph));
2589 term.alt[i] = xmalloc(col * sizeof(Glyph));
2590 }
2591 if(col > term.col) {
2592 bp = term.tabs + term.col;
2593
2594 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2595 while(--bp > term.tabs && !*bp)
2596 /* nothing */ ;
2597 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2598 *bp = 1;
2599 }
2600 /* update terminal size */
2601 term.col = col;
2602 term.row = row;
2603 /* reset scrolling region */
2604 tsetscroll(0, row-1);
2605 /* make use of the LIMIT in tmoveto */
2606 tmoveto(term.c.x, term.c.y);
2607 /* Clearing both screens */
2608 orig = term.line;
2609 do {
2610 if(mincol < col && 0 < minrow) {
2611 tclearregion(mincol, 0, col - 1, minrow - 1);
2612 }
2613 if(0 < col && minrow < row) {
2614 tclearregion(0, minrow, col - 1, row - 1);
2615 }
2616 tswapscreen();
2617 } while(orig != term.line);
2618
2619 return (slide > 0);
2620 }
2621
2622 void
2623 xresize(int col, int row) {
2624 xw.tw = MAX(1, col * xw.cw);
2625 xw.th = MAX(1, row * xw.ch);
2626
2627 XFreePixmap(xw.dpy, xw.buf);
2628 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2629 DefaultDepth(xw.dpy, xw.scr));
2630 XftDrawChange(xw.draw, xw.buf);
2631 xclear(0, 0, xw.w, xw.h);
2632 }
2633
2634 static inline ushort
2635 sixd_to_16bit(int x) {
2636 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2637 }
2638
2639 void
2640 xloadcols(void) {
2641 int i, r, g, b;
2642 XRenderColor color = { .alpha = 0xffff };
2643 static bool loaded;
2644 Colour *cp;
2645
2646 if(loaded) {
2647 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2648 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2649 }
2650
2651 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2652 for(i = 0; i < LEN(colorname); i++) {
2653 if(!colorname[i])
2654 continue;
2655 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2656 die("Could not allocate color '%s'\n", colorname[i]);
2657 }
2658 }
2659
2660 /* load colors [16-255] ; same colors as xterm */
2661 for(i = 16, r = 0; r < 6; r++) {
2662 for(g = 0; g < 6; g++) {
2663 for(b = 0; b < 6; b++) {
2664 color.red = sixd_to_16bit(r);
2665 color.green = sixd_to_16bit(g);
2666 color.blue = sixd_to_16bit(b);
2667 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2668 die("Could not allocate color %d\n", i);
2669 }
2670 i++;
2671 }
2672 }
2673 }
2674
2675 for(r = 0; r < 24; r++, i++) {
2676 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2677 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2678 &dc.col[i])) {
2679 die("Could not allocate color %d\n", i);
2680 }
2681 }
2682 loaded = true;
2683 }
2684
2685 int
2686 xsetcolorname(int x, const char *name) {
2687 XRenderColor color = { .alpha = 0xffff };
2688 Colour colour;
2689 if (x < 0 || x > LEN(colorname))
2690 return -1;
2691 if(!name) {
2692 if(16 <= x && x < 16 + 216) {
2693 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2694 color.red = sixd_to_16bit(r);
2695 color.green = sixd_to_16bit(g);
2696 color.blue = sixd_to_16bit(b);
2697 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2698 return 0; /* something went wrong */
2699 dc.col[x] = colour;
2700 return 1;
2701 } else if (16 + 216 <= x && x < 256) {
2702 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2703 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2704 return 0; /* something went wrong */
2705 dc.col[x] = colour;
2706 return 1;
2707 } else {
2708 name = colorname[x];
2709 }
2710 }
2711 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2712 return 0;
2713 dc.col[x] = colour;
2714 return 1;
2715 }
2716
2717 void
2718 xtermclear(int col1, int row1, int col2, int row2) {
2719 XftDrawRect(xw.draw,
2720 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2721 borderpx + col1 * xw.cw,
2722 borderpx + row1 * xw.ch,
2723 (col2-col1+1) * xw.cw,
2724 (row2-row1+1) * xw.ch);
2725 }
2726
2727 /*
2728 * Absolute coordinates.
2729 */
2730 void
2731 xclear(int x1, int y1, int x2, int y2) {
2732 XftDrawRect(xw.draw,
2733 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2734 x1, y1, x2-x1, y2-y1);
2735 }
2736
2737 void
2738 xhints(void) {
2739 XClassHint class = {opt_class ? opt_class : termname, termname};
2740 XWMHints wm = {.flags = InputHint, .input = 1};
2741 XSizeHints *sizeh = NULL;
2742
2743 sizeh = XAllocSizeHints();
2744 if(xw.isfixed == False) {
2745 sizeh->flags = PSize | PResizeInc | PBaseSize;
2746 sizeh->height = xw.h;
2747 sizeh->width = xw.w;
2748 sizeh->height_inc = xw.ch;
2749 sizeh->width_inc = xw.cw;
2750 sizeh->base_height = 2 * borderpx;
2751 sizeh->base_width = 2 * borderpx;
2752 } else {
2753 sizeh->flags = PMaxSize | PMinSize;
2754 sizeh->min_width = sizeh->max_width = xw.fw;
2755 sizeh->min_height = sizeh->max_height = xw.fh;
2756 }
2757
2758 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2759 XFree(sizeh);
2760 }
2761
2762 int
2763 xloadfont(Font *f, FcPattern *pattern) {
2764 FcPattern *match;
2765 FcResult result;
2766
2767 match = FcFontMatch(NULL, pattern, &result);
2768 if(!match)
2769 return 1;
2770
2771 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2772 FcPatternDestroy(match);
2773 return 1;
2774 }
2775
2776 f->set = NULL;
2777 f->pattern = FcPatternDuplicate(pattern);
2778
2779 f->ascent = f->match->ascent;
2780 f->descent = f->match->descent;
2781 f->lbearing = 0;
2782 f->rbearing = f->match->max_advance_width;
2783
2784 f->height = f->ascent + f->descent;
2785 f->width = f->lbearing + f->rbearing;
2786
2787 return 0;
2788 }
2789
2790 void
2791 xloadfonts(char *fontstr, int fontsize) {
2792 FcPattern *pattern;
2793 FcResult result;
2794 double fontval;
2795
2796 if(fontstr[0] == '-') {
2797 pattern = XftXlfdParse(fontstr, False, False);
2798 } else {
2799 pattern = FcNameParse((FcChar8 *)fontstr);
2800 }
2801
2802 if(!pattern)
2803 die("st: can't open font %s\n", fontstr);
2804
2805 if(fontsize > 0) {
2806 FcPatternDel(pattern, FC_PIXEL_SIZE);
2807 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2808 usedfontsize = fontsize;
2809 } else {
2810 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2811 if(result == FcResultMatch) {
2812 usedfontsize = (int)fontval;
2813 } else {
2814 /*
2815 * Default font size is 12, if none given. This is to
2816 * have a known usedfontsize value.
2817 */
2818 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2819 usedfontsize = 12;
2820 }
2821 }
2822
2823 FcConfigSubstitute(0, pattern, FcMatchPattern);
2824 FcDefaultSubstitute(pattern);
2825
2826 if(xloadfont(&dc.font, pattern))
2827 die("st: can't open font %s\n", fontstr);
2828
2829 /* Setting character width and height. */
2830 xw.cw = CEIL(dc.font.width * cwscale);
2831 xw.ch = CEIL(dc.font.height * chscale);
2832
2833 FcPatternDel(pattern, FC_SLANT);
2834 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2835 if(xloadfont(&dc.ifont, pattern))
2836 die("st: can't open font %s\n", fontstr);
2837
2838 FcPatternDel(pattern, FC_WEIGHT);
2839 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2840 if(xloadfont(&dc.ibfont, pattern))
2841 die("st: can't open font %s\n", fontstr);
2842
2843 FcPatternDel(pattern, FC_SLANT);
2844 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2845 if(xloadfont(&dc.bfont, pattern))
2846 die("st: can't open font %s\n", fontstr);
2847
2848 FcPatternDestroy(pattern);
2849 }
2850
2851 int
2852 xloadfontset(Font *f) {
2853 FcResult result;
2854
2855 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2856 return 1;
2857 return 0;
2858 }
2859
2860 void
2861 xunloadfont(Font *f) {
2862 XftFontClose(xw.dpy, f->match);
2863 FcPatternDestroy(f->pattern);
2864 if(f->set)
2865 FcFontSetDestroy(f->set);
2866 }
2867
2868 void
2869 xunloadfonts(void) {
2870 int i;
2871
2872 /* Free the loaded fonts in the font cache. */
2873 for(i = 0; i < frclen; i++) {
2874 XftFontClose(xw.dpy, frc[i].font);
2875 }
2876 frclen = 0;
2877
2878 xunloadfont(&dc.font);
2879 xunloadfont(&dc.bfont);
2880 xunloadfont(&dc.ifont);
2881 xunloadfont(&dc.ibfont);
2882 }
2883
2884 void
2885 xzoom(const Arg *arg) {
2886 xunloadfonts();
2887 xloadfonts(usedfont, usedfontsize + arg->i);
2888 cresize(0, 0);
2889 redraw(0);
2890 }
2891
2892 void
2893 xinit(void) {
2894 XGCValues gcvalues;
2895 Cursor cursor;
2896 Window parent;
2897 int sw, sh;
2898
2899 if(!(xw.dpy = XOpenDisplay(NULL)))
2900 die("Can't open display\n");
2901 xw.scr = XDefaultScreen(xw.dpy);
2902 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2903
2904 /* font */
2905 if(!FcInit())
2906 die("Could not init fontconfig.\n");
2907
2908 usedfont = (opt_font == NULL)? font : opt_font;
2909 xloadfonts(usedfont, 0);
2910
2911 /* colors */
2912 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2913 xloadcols();
2914
2915 /* adjust fixed window geometry */
2916 if(xw.isfixed) {
2917 sw = DisplayWidth(xw.dpy, xw.scr);
2918 sh = DisplayHeight(xw.dpy, xw.scr);
2919 if(xw.fx < 0)
2920 xw.fx = sw + xw.fx - xw.fw - 1;
2921 if(xw.fy < 0)
2922 xw.fy = sh + xw.fy - xw.fh - 1;
2923
2924 xw.h = xw.fh;
2925 xw.w = xw.fw;
2926 } else {
2927 /* window - default size */
2928 xw.h = 2 * borderpx + term.row * xw.ch;
2929 xw.w = 2 * borderpx + term.col * xw.cw;
2930 xw.fx = 0;
2931 xw.fy = 0;
2932 }
2933
2934 /* Events */
2935 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
2936 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
2937 xw.attrs.bit_gravity = NorthWestGravity;
2938 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
2939 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2940 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2941 xw.attrs.colormap = xw.cmap;
2942
2943 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2944 XRootWindow(xw.dpy, xw.scr);
2945 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2946 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2947 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
2948 | CWEventMask | CWColormap, &xw.attrs);
2949
2950 memset(&gcvalues, 0, sizeof(gcvalues));
2951 gcvalues.graphics_exposures = False;
2952 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2953 &gcvalues);
2954 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2955 DefaultDepth(xw.dpy, xw.scr));
2956 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2957 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2958
2959 /* Xft rendering context */
2960 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2961
2962 /* input methods */
2963 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2964 XSetLocaleModifiers("@im=local");
2965 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2966 XSetLocaleModifiers("@im=");
2967 if((xw.xim = XOpenIM(xw.dpy,
2968 NULL, NULL, NULL)) == NULL) {
2969 die("XOpenIM failed. Could not open input"
2970 " device.\n");
2971 }
2972 }
2973 }
2974 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2975 | XIMStatusNothing, XNClientWindow, xw.win,
2976 XNFocusWindow, xw.win, NULL);
2977 if(xw.xic == NULL)
2978 die("XCreateIC failed. Could not obtain input method.\n");
2979
2980 /* white cursor, black outline */
2981 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2982 XDefineCursor(xw.dpy, xw.win, cursor);
2983 XRecolorCursor(xw.dpy, cursor,
2984 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2985 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2986
2987 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2988 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2989 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2990
2991 xresettitle();
2992 XMapWindow(xw.dpy, xw.win);
2993 xhints();
2994 XSync(xw.dpy, 0);
2995 }
2996
2997 void
2998 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2999 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3000 width = charlen * xw.cw, xp, i;
3001 int frcflags;
3002 int u8fl, u8fblen, u8cblen, doesexist;
3003 char *u8c, *u8fs;
3004 long u8char;
3005 Font *font = &dc.font;
3006 FcResult fcres;
3007 FcPattern *fcpattern, *fontpattern;
3008 FcFontSet *fcsets[] = { NULL };
3009 FcCharSet *fccharset;
3010 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3011 XRenderColor colfg, colbg;
3012 Rectangle r;
3013 int oneatatime;
3014
3015 frcflags = FRC_NORMAL;
3016
3017 if(base.mode & ATTR_ITALIC) {
3018 if(base.fg == defaultfg)
3019 base.fg = defaultitalic;
3020 font = &dc.ifont;
3021 frcflags = FRC_ITALIC;
3022 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3023 if(base.fg == defaultfg)
3024 base.fg = defaultitalic;
3025 font = &dc.ibfont;
3026 frcflags = FRC_ITALICBOLD;
3027 } else if(base.mode & ATTR_UNDERLINE) {
3028 if(base.fg == defaultfg)
3029 base.fg = defaultunderline;
3030 }
3031 if(IS_TRUECOL(base.fg)) {
3032 colfg.red = TRUERED(base.fg);
3033 colfg.green = TRUEGREEN(base.fg);
3034 colfg.blue = TRUEBLUE(base.fg);
3035 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3036 fg = &truefg;
3037 } else {
3038 fg = &dc.col[base.fg];
3039 }
3040
3041 if(IS_TRUECOL(base.bg)) {
3042 colbg.green = TRUEGREEN(base.bg);
3043 colbg.red = TRUERED(base.bg);
3044 colbg.blue = TRUEBLUE(base.bg);
3045 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3046 bg = &truebg;
3047 } else {
3048 bg = &dc.col[base.bg];
3049 }
3050
3051
3052
3053 if(base.mode & ATTR_BOLD) {
3054 if(BETWEEN(base.fg, 0, 7)) {
3055 /* basic system colors */
3056 fg = &dc.col[base.fg + 8];
3057 } else if(BETWEEN(base.fg, 16, 195)) {
3058 /* 256 colors */
3059 fg = &dc.col[base.fg + 36];
3060 } else if(BETWEEN(base.fg, 232, 251)) {
3061 /* greyscale */
3062 fg = &dc.col[base.fg + 4];
3063 }
3064 /*
3065 * Those ranges will not be brightened:
3066 * 8 - 15 – bright system colors
3067 * 196 - 231 – highest 256 color cube
3068 * 252 - 255 – brightest colors in greyscale
3069 */
3070 font = &dc.bfont;
3071 frcflags = FRC_BOLD;
3072 }
3073
3074 if(IS_SET(MODE_REVERSE)) {
3075 if(fg == &dc.col[defaultfg]) {
3076 fg = &dc.col[defaultbg];
3077 } else {
3078 colfg.red = ~fg->color.red;
3079 colfg.green = ~fg->color.green;
3080 colfg.blue = ~fg->color.blue;
3081 colfg.alpha = fg->color.alpha;
3082 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3083 fg = &revfg;
3084 }
3085
3086 if(bg == &dc.col[defaultbg]) {
3087 bg = &dc.col[defaultfg];
3088 } else {
3089 colbg.red = ~bg->color.red;
3090 colbg.green = ~bg->color.green;
3091 colbg.blue = ~bg->color.blue;
3092 colbg.alpha = bg->color.alpha;
3093 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
3094 bg = &revbg;
3095 }
3096 }
3097
3098 if(base.mode & ATTR_REVERSE) {
3099 temp = fg;
3100 fg = bg;
3101 bg = temp;
3102 }
3103
3104 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3105 fg = bg;
3106
3107 /* Intelligent cleaning up of the borders. */
3108 if(x == 0) {
3109 xclear(0, (y == 0)? 0 : winy, borderpx,
3110 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3111 }
3112 if(x + charlen >= term.col) {
3113 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3114 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3115 }
3116 if(y == 0)
3117 xclear(winx, 0, winx + width, borderpx);
3118 if(y == term.row-1)
3119 xclear(winx, winy + xw.ch, winx + width, xw.h);
3120
3121 /* Clean up the region we want to draw to. */
3122 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3123
3124 /* Set the clip region because Xft is sometimes dirty. */
3125 r.x = 0;
3126 r.y = 0;
3127 r.height = xw.ch;
3128 r.width = width;
3129 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3130
3131 for(xp = winx; bytelen > 0;) {
3132 /*
3133 * Search for the range in the to be printed string of glyphs
3134 * that are in the main font. Then print that range. If
3135 * some glyph is found that is not in the font, do the
3136 * fallback dance.
3137 */
3138 u8fs = s;
3139 u8fblen = 0;
3140 u8fl = 0;
3141 oneatatime = font->width != xw.cw;
3142 for(;;) {
3143 u8c = s;
3144 u8cblen = utf8decode(s, &u8char);
3145 s += u8cblen;
3146 bytelen -= u8cblen;
3147
3148 doesexist = XftCharExists(xw.dpy, font->match, u8char);
3149 if(oneatatime || !doesexist || bytelen <= 0) {
3150 if(oneatatime || bytelen <= 0) {
3151 if(doesexist) {
3152 u8fl++;
3153 u8fblen += u8cblen;
3154 }
3155 }
3156
3157 if(u8fl > 0) {
3158 XftDrawStringUtf8(xw.draw, fg,
3159 font->match, xp,
3160 winy + font->ascent,
3161 (FcChar8 *)u8fs,
3162 u8fblen);
3163 xp += xw.cw * u8fl;
3164
3165 }
3166 break;
3167 }
3168
3169 u8fl++;
3170 u8fblen += u8cblen;
3171 }
3172 if(doesexist) {
3173 if (oneatatime)
3174 continue;
3175 break;
3176 }
3177
3178 /* Search the font cache. */
3179 for(i = 0; i < frclen; i++) {
3180 if(XftCharExists(xw.dpy, frc[i].font, u8char)
3181 && frc[i].flags == frcflags) {
3182 break;
3183 }
3184 }
3185
3186 /* Nothing was found. */
3187 if(i >= frclen) {
3188 if(!font->set)
3189 xloadfontset(font);
3190 fcsets[0] = font->set;
3191
3192 /*
3193 * Nothing was found in the cache. Now use
3194 * some dozen of Fontconfig calls to get the
3195 * font for one single character.
3196 */
3197 fcpattern = FcPatternDuplicate(font->pattern);
3198 fccharset = FcCharSetCreate();
3199
3200 FcCharSetAddChar(fccharset, u8char);
3201 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3202 fccharset);
3203 FcPatternAddBool(fcpattern, FC_SCALABLE,
3204 FcTrue);
3205
3206 FcConfigSubstitute(0, fcpattern,
3207 FcMatchPattern);
3208 FcDefaultSubstitute(fcpattern);
3209
3210 fontpattern = FcFontSetMatch(0, fcsets,
3211 FcTrue, fcpattern, &fcres);
3212
3213 /*
3214 * Overwrite or create the new cache entry.
3215 */
3216 if(frclen >= LEN(frc)) {
3217 frclen = LEN(frc) - 1;
3218 XftFontClose(xw.dpy, frc[frclen].font);
3219 }
3220
3221 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3222 fontpattern);
3223 frc[frclen].flags = frcflags;
3224
3225 i = frclen;
3226 frclen++;
3227
3228 FcPatternDestroy(fcpattern);
3229 FcCharSetDestroy(fccharset);
3230 }
3231
3232 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3233 xp, winy + frc[i].font->ascent,
3234 (FcChar8 *)u8c, u8cblen);
3235
3236 xp += xw.cw * wcwidth(u8char);
3237 }
3238
3239 /*
3240 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3241 winy + font->ascent, (FcChar8 *)s, bytelen);
3242 */
3243
3244 if(base.mode & ATTR_UNDERLINE) {
3245 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3246 width, 1);
3247 }
3248
3249 /* Reset clip to none. */
3250 XftDrawSetClip(xw.draw, 0);
3251 }
3252
3253 void
3254 xdrawcursor(void) {
3255 static int oldx = 0, oldy = 0;
3256 int sl, width, curx;
3257 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3258
3259 LIMIT(oldx, 0, term.col-1);
3260 LIMIT(oldy, 0, term.row-1);
3261
3262 curx = term.c.x;
3263
3264 /* adjust position if in dummy */
3265 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3266 oldx--;
3267 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3268 curx--;
3269
3270 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3271
3272 /* remove the old cursor */
3273 sl = utf8size(term.line[oldy][oldx].c);
3274 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3275 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3276 oldy, width, sl);
3277
3278 /* draw the new one */
3279 if(!(IS_SET(MODE_HIDE))) {
3280 if(xw.state & WIN_FOCUSED) {
3281 if(IS_SET(MODE_REVERSE)) {
3282 g.mode |= ATTR_REVERSE;
3283 g.fg = defaultcs;
3284 g.bg = defaultfg;
3285 }
3286
3287 sl = utf8size(g.c);
3288 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3289 ? 2 : 1;
3290 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3291 } else {
3292 XftDrawRect(xw.draw, &dc.col[defaultcs],
3293 borderpx + curx * xw.cw,
3294 borderpx + term.c.y * xw.ch,
3295 xw.cw - 1, 1);
3296 XftDrawRect(xw.draw, &dc.col[defaultcs],
3297 borderpx + curx * xw.cw,
3298 borderpx + term.c.y * xw.ch,
3299 1, xw.ch - 1);
3300 XftDrawRect(xw.draw, &dc.col[defaultcs],
3301 borderpx + (curx + 1) * xw.cw - 1,
3302 borderpx + term.c.y * xw.ch,
3303 1, xw.ch - 1);
3304 XftDrawRect(xw.draw, &dc.col[defaultcs],
3305 borderpx + curx * xw.cw,
3306 borderpx + (term.c.y + 1) * xw.ch - 1,
3307 xw.cw, 1);
3308 }
3309 oldx = curx, oldy = term.c.y;
3310 }
3311 }
3312
3313
3314 void
3315 xsettitle(char *p) {
3316 XTextProperty prop;
3317
3318 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3319 &prop);
3320 XSetWMName(xw.dpy, xw.win, &prop);
3321 XFree(prop.value);
3322 }
3323
3324 void
3325 xresettitle(void) {
3326 xsettitle(opt_title ? opt_title : "st");
3327 }
3328
3329 void
3330 redraw(int timeout) {
3331 struct timespec tv = {0, timeout * 1000};
3332
3333 tfulldirt();
3334 draw();
3335
3336 if(timeout > 0) {
3337 nanosleep(&tv, NULL);
3338 XSync(xw.dpy, False); /* necessary for a good tput flash */
3339 }
3340 }
3341
3342 void
3343 draw(void) {
3344 drawregion(0, 0, term.col, term.row);
3345 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3346 xw.h, 0, 0);
3347 XSetForeground(xw.dpy, dc.gc,
3348 dc.col[IS_SET(MODE_REVERSE)?
3349 defaultfg : defaultbg].pixel);
3350 }
3351
3352 void
3353 drawregion(int x1, int y1, int x2, int y2) {
3354 int ic, ib, x, y, ox, sl;
3355 Glyph base, new;
3356 char buf[DRAW_BUF_SIZ];
3357 bool ena_sel = sel.ob.x != -1;
3358 long u8char;
3359
3360 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3361 ena_sel = 0;
3362
3363 if(!(xw.state & WIN_VISIBLE))
3364 return;
3365
3366 for(y = y1; y < y2; y++) {
3367 if(!term.dirty[y])
3368 continue;
3369
3370 xtermclear(0, y, term.col, y);
3371 term.dirty[y] = 0;
3372 base = term.line[y][0];
3373 ic = ib = ox = 0;
3374 for(x = x1; x < x2; x++) {
3375 new = term.line[y][x];
3376 if(new.mode == ATTR_WDUMMY)
3377 continue;
3378 if(ena_sel && selected(x, y))
3379 new.mode ^= ATTR_REVERSE;
3380 if(ib > 0 && (ATTRCMP(base, new)
3381 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3382 xdraws(buf, base, ox, y, ic, ib);
3383 ic = ib = 0;
3384 }
3385 if(ib == 0) {
3386 ox = x;
3387 base = new;
3388 }
3389
3390 sl = utf8decode(new.c, &u8char);
3391 memcpy(buf+ib, new.c, sl);
3392 ib += sl;
3393 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3394 }
3395 if(ib > 0)
3396 xdraws(buf, base, ox, y, ic, ib);
3397 }
3398 xdrawcursor();
3399 }
3400
3401 void
3402 expose(XEvent *ev) {
3403 XExposeEvent *e = &ev->xexpose;
3404
3405 if(xw.state & WIN_REDRAW) {
3406 if(!e->count)
3407 xw.state &= ~WIN_REDRAW;
3408 }
3409 redraw(0);
3410 }
3411
3412 void
3413 visibility(XEvent *ev) {
3414 XVisibilityEvent *e = &ev->xvisibility;
3415
3416 if(e->state == VisibilityFullyObscured) {
3417 xw.state &= ~WIN_VISIBLE;
3418 } else if(!(xw.state & WIN_VISIBLE)) {
3419 /* need a full redraw for next Expose, not just a buf copy */
3420 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3421 }
3422 }
3423
3424 void
3425 unmap(XEvent *ev) {
3426 xw.state &= ~WIN_VISIBLE;
3427 }
3428
3429 void
3430 xsetpointermotion(int set) {
3431 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3432 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3433 }
3434
3435 void
3436 xseturgency(int add) {
3437 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3438
3439 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3440 XSetWMHints(xw.dpy, xw.win, h);
3441 XFree(h);
3442 }
3443
3444 void
3445 focus(XEvent *ev) {
3446 XFocusChangeEvent *e = &ev->xfocus;
3447
3448 if(e->mode == NotifyGrab)
3449 return;
3450
3451 if(ev->type == FocusIn) {
3452 XSetICFocus(xw.xic);
3453 xw.state |= WIN_FOCUSED;
3454 xseturgency(0);
3455 if(IS_SET(MODE_FOCUS))
3456 ttywrite("\033[I", 3);
3457 } else {
3458 XUnsetICFocus(xw.xic);
3459 xw.state &= ~WIN_FOCUSED;
3460 if(IS_SET(MODE_FOCUS))
3461 ttywrite("\033[O", 3);
3462 }
3463 }
3464
3465 static inline bool
3466 match(uint mask, uint state) {
3467 state &= ~ignoremod;
3468
3469 if(mask == XK_NO_MOD && state)
3470 return false;
3471 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3472 return false;
3473 if(mask == XK_ANY_MOD)
3474 return true;
3475 return state == mask;
3476 }
3477
3478 void
3479 numlock(const Arg *dummy) {
3480 term.numlock ^= 1;
3481 }
3482
3483 char*
3484 kmap(KeySym k, uint state) {
3485 Key *kp;
3486 int i;
3487
3488 /* Check for mapped keys out of X11 function keys. */
3489 for(i = 0; i < LEN(mappedkeys); i++) {
3490 if(mappedkeys[i] == k)
3491 break;
3492 }
3493 if(i == LEN(mappedkeys)) {
3494 if((k & 0xFFFF) < 0xFD00)
3495 return NULL;
3496 }
3497
3498 for(kp = key; kp < key + LEN(key); kp++) {
3499 if(kp->k != k)
3500 continue;
3501
3502 if(!match(kp->mask, state))
3503 continue;
3504
3505 if(kp->appkey > 0) {
3506 if(!IS_SET(MODE_APPKEYPAD))
3507 continue;
3508 if(term.numlock && kp->appkey == 2)
3509 continue;
3510 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3511 continue;
3512 }
3513
3514 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3515 (kp->appcursor > 0
3516 && !IS_SET(MODE_APPCURSOR))) {
3517 continue;
3518 }
3519
3520 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3521 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3522 continue;
3523 }
3524
3525 return kp->s;
3526 }
3527
3528 return NULL;
3529 }
3530
3531 void
3532 kpress(XEvent *ev) {
3533 XKeyEvent *e = &ev->xkey;
3534 KeySym ksym;
3535 char xstr[31], buf[32], *customkey, *cp = buf;
3536 int len, ret;
3537 long c;
3538 Status status;
3539 Shortcut *bp;
3540
3541 if(IS_SET(MODE_KBDLOCK))
3542 return;
3543
3544 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3545 e->state &= ~Mod2Mask;
3546 /* 1. shortcuts */
3547 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3548 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3549 bp->func(&(bp->arg));
3550 return;
3551 }
3552 }
3553
3554 /* 2. custom keys from config.h */
3555 if((customkey = kmap(ksym, e->state))) {
3556 len = strlen(customkey);
3557 memcpy(buf, customkey, len);
3558 /* 3. hardcoded (overrides X lookup) */
3559 } else {
3560 if(len == 0)
3561 return;
3562
3563 if(len == 1 && e->state & Mod1Mask) {
3564 if(IS_SET(MODE_8BIT)) {
3565 if(*xstr < 0177) {
3566 c = *xstr | 0x80;
3567 ret = utf8encode(&c, cp);
3568 cp += ret;
3569 len = 0;
3570 }
3571 } else {
3572 *cp++ = '\033';
3573 }
3574 }
3575
3576 memcpy(cp, xstr, len);
3577 len = cp - buf + len;
3578 }
3579
3580 ttywrite(buf, len);
3581 if(IS_SET(MODE_ECHO))
3582 techo(buf, len);
3583 }
3584
3585
3586 void
3587 cmessage(XEvent *e) {
3588 /*
3589 * See xembed specs
3590 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3591 */
3592 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3593 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3594 xw.state |= WIN_FOCUSED;
3595 xseturgency(0);
3596 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3597 xw.state &= ~WIN_FOCUSED;
3598 }
3599 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3600 /* Send SIGHUP to shell */
3601 kill(pid, SIGHUP);
3602 exit(EXIT_SUCCESS);
3603 }
3604 }
3605
3606 void
3607 cresize(int width, int height) {
3608 int col, row;
3609
3610 if(width != 0)
3611 xw.w = width;
3612 if(height != 0)
3613 xw.h = height;
3614
3615 col = (xw.w - 2 * borderpx) / xw.cw;
3616 row = (xw.h - 2 * borderpx) / xw.ch;
3617
3618 tresize(col, row);
3619 xresize(col, row);
3620 ttyresize();
3621 }
3622
3623 void
3624 resize(XEvent *e) {
3625 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3626 return;
3627
3628 cresize(e->xconfigure.width, e->xconfigure.height);
3629 }
3630
3631 void
3632 run(void) {
3633 XEvent ev;
3634 int w = xw.w, h = xw.h;
3635 fd_set rfd;
3636 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3637 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3638
3639 /* Waiting for window mapping */
3640 while(1) {
3641 XNextEvent(xw.dpy, &ev);
3642 if(ev.type == ConfigureNotify) {
3643 w = ev.xconfigure.width;
3644 h = ev.xconfigure.height;
3645 } else if(ev.type == MapNotify) {
3646 break;
3647 }
3648 }
3649
3650 if(!xw.isfixed)
3651 cresize(w, h);
3652 else
3653 cresize(xw.fw, xw.fh);
3654 ttynew();
3655
3656 gettimeofday(&lastblink, NULL);
3657 gettimeofday(&last, NULL);
3658
3659 for(xev = actionfps;;) {
3660 FD_ZERO(&rfd);
3661 FD_SET(cmdfd, &rfd);
3662 FD_SET(xfd, &rfd);
3663
3664 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3665 if(errno == EINTR)
3666 continue;
3667 die("select failed: %s\n", SERRNO);
3668 }
3669 if(FD_ISSET(cmdfd, &rfd)) {
3670 ttyread();
3671 if(blinktimeout) {
3672 blinkset = tattrset(ATTR_BLINK);
3673 if(!blinkset)
3674 MODBIT(term.mode, 0, MODE_BLINK);
3675 }
3676 }
3677
3678 if(FD_ISSET(xfd, &rfd))
3679 xev = actionfps;
3680
3681 gettimeofday(&now, NULL);
3682 drawtimeout.tv_sec = 0;
3683 drawtimeout.tv_usec = (1000/xfps) * 1000;
3684 tv = &drawtimeout;
3685
3686 dodraw = 0;
3687 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3688 tsetdirtattr(ATTR_BLINK);
3689 term.mode ^= MODE_BLINK;
3690 gettimeofday(&lastblink, NULL);
3691 dodraw = 1;
3692 }
3693 if(TIMEDIFF(now, last) \
3694 > (xev? (1000/xfps) : (1000/actionfps))) {
3695 dodraw = 1;
3696 last = now;
3697 }
3698
3699 if(dodraw) {
3700 while(XPending(xw.dpy)) {
3701 XNextEvent(xw.dpy, &ev);
3702 if(XFilterEvent(&ev, None))
3703 continue;
3704 if(handler[ev.type])
3705 (handler[ev.type])(&ev);
3706 }
3707
3708 draw();
3709 XFlush(xw.dpy);
3710
3711 if(xev && !FD_ISSET(xfd, &rfd))
3712 xev--;
3713 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3714 if(blinkset) {
3715 if(TIMEDIFF(now, lastblink) \
3716 > blinktimeout) {
3717 drawtimeout.tv_usec = 1;
3718 } else {
3719 drawtimeout.tv_usec = (1000 * \
3720 (blinktimeout - \
3721 TIMEDIFF(now,
3722 lastblink)));
3723 }
3724 } else {
3725 tv = NULL;
3726 }
3727 }
3728 }
3729 }
3730 }
3731
3732 void
3733 usage(void) {
3734 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3735 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3736 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3737 }
3738
3739 int
3740 main(int argc, char *argv[]) {
3741 int bitm, xr, yr;
3742 uint wr, hr;
3743 char *titles;
3744
3745 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3746 xw.isfixed = False;
3747
3748 ARGBEGIN {
3749 case 'a':
3750 allowaltscreen = false;
3751 break;
3752 case 'c':
3753 opt_class = EARGF(usage());
3754 break;
3755 case 'e':
3756 /* eat all remaining arguments */
3757 if(argc > 1) {
3758 opt_cmd = &argv[1];
3759 if(argv[1] != NULL && opt_title == NULL) {
3760 titles = strdup(argv[1]);
3761 opt_title = basename(titles);
3762 }
3763 }
3764 goto run;
3765 case 'f':
3766 opt_font = EARGF(usage());
3767 break;
3768 case 'g':
3769 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3770 if(bitm & XValue)
3771 xw.fx = xr;
3772 if(bitm & YValue)
3773 xw.fy = yr;
3774 if(bitm & WidthValue)
3775 xw.fw = (int)wr;
3776 if(bitm & HeightValue)
3777 xw.fh = (int)hr;
3778 if(bitm & XNegative && xw.fx == 0)
3779 xw.fx = -1;
3780 if(bitm & YNegative && xw.fy == 0)
3781 xw.fy = -1;
3782
3783 if(xw.fh != 0 && xw.fw != 0)
3784 xw.isfixed = True;
3785 break;
3786 case 'o':
3787 opt_io = EARGF(usage());
3788 break;
3789 case 't':
3790 opt_title = EARGF(usage());
3791 break;
3792 case 'w':
3793 opt_embed = EARGF(usage());
3794 break;
3795 case 'v':
3796 default:
3797 usage();
3798 } ARGEND;
3799
3800 run:
3801 setlocale(LC_CTYPE, "");
3802 XSetLocaleModifiers("");
3803 tnew(80, 24);
3804 xinit();
3805 selinit();
3806 run();
3807
3808 return 0;
3809 }
3810