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Add xstrdup function
[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 <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39 #define Draw XftDraw *
40 #define Colour XftColor
41 #define Colourmap Colormap
42 #define Rectangle XRectangle
43
44 #if defined(__linux)
45 #include <pty.h>
46 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
47 #include <util.h>
48 #elif defined(__FreeBSD__) || defined(__DragonFly__)
49 #include <libutil.h>
50 #endif
51
52
53 /* XEMBED messages */
54 #define XEMBED_FOCUS_IN 4
55 #define XEMBED_FOCUS_OUT 5
56
57 /* Arbitrary sizes */
58 #define UTF_SIZ 4
59 #define ESC_BUF_SIZ (128*UTF_SIZ)
60 #define ESC_ARG_SIZ 16
61 #define STR_BUF_SIZ ESC_BUF_SIZ
62 #define STR_ARG_SIZ ESC_ARG_SIZ
63 #define DRAW_BUF_SIZ 20*1024
64 #define XK_ANY_MOD UINT_MAX
65 #define XK_NO_MOD 0
66 #define XK_SWITCH_MOD (1<<13)
67
68 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
69
70 /* macros */
71 #define SERRNO strerror(errno)
72 #define MIN(a, b) ((a) < (b) ? (a) : (b))
73 #define MAX(a, b) ((a) < (b) ? (b) : (a))
74 #define LEN(a) (sizeof(a) / sizeof(a[0]))
75 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
76 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
77 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
78 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
79 #define IS_SET(flag) ((term.mode & (flag)) != 0)
80 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
81 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
82
83 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
84 #define IS_TRUECOL(x) (1 << 24 & (x))
85 #define TRUERED(x) (((x) & 0xff0000) >> 8)
86 #define TRUEGREEN(x) (((x) & 0xff00))
87 #define TRUEBLUE(x) (((x) & 0xff) << 8)
88
89
90 #define VT102ID "\033[?6c"
91
92 enum glyph_attribute {
93 ATTR_NULL = 0,
94 ATTR_REVERSE = 1,
95 ATTR_UNDERLINE = 2,
96 ATTR_BOLD = 4,
97 ATTR_GFX = 8,
98 ATTR_ITALIC = 16,
99 ATTR_BLINK = 32,
100 ATTR_WRAP = 64,
101 ATTR_WIDE = 128,
102 ATTR_WDUMMY = 256,
103 };
104
105 enum cursor_movement {
106 CURSOR_SAVE,
107 CURSOR_LOAD
108 };
109
110 enum cursor_state {
111 CURSOR_DEFAULT = 0,
112 CURSOR_WRAPNEXT = 1,
113 CURSOR_ORIGIN = 2
114 };
115
116 enum term_mode {
117 MODE_WRAP = 1,
118 MODE_INSERT = 2,
119 MODE_APPKEYPAD = 4,
120 MODE_ALTSCREEN = 8,
121 MODE_CRLF = 16,
122 MODE_MOUSEBTN = 32,
123 MODE_MOUSEMOTION = 64,
124 MODE_REVERSE = 128,
125 MODE_KBDLOCK = 256,
126 MODE_HIDE = 512,
127 MODE_ECHO = 1024,
128 MODE_APPCURSOR = 2048,
129 MODE_MOUSESGR = 4096,
130 MODE_8BIT = 8192,
131 MODE_BLINK = 16384,
132 MODE_FBLINK = 32768,
133 MODE_FOCUS = 65536,
134 MODE_MOUSEX10 = 131072,
135 MODE_MOUSEMANY = 262144,
136 MODE_BRCKTPASTE = 524288,
137 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
138 |MODE_MOUSEMANY,
139 };
140
141 enum charset {
142 CS_GRAPHIC0,
143 CS_GRAPHIC1,
144 CS_UK,
145 CS_USA,
146 CS_MULTI,
147 CS_GER,
148 CS_FIN
149 };
150
151 enum escape_state {
152 ESC_START = 1,
153 ESC_CSI = 2,
154 ESC_STR = 4, /* DSC, OSC, PM, APC */
155 ESC_ALTCHARSET = 8,
156 ESC_STR_END = 16, /* a final string was encountered */
157 ESC_TEST = 32, /* Enter in test mode */
158 };
159
160 enum window_state {
161 WIN_VISIBLE = 1,
162 WIN_REDRAW = 2,
163 WIN_FOCUSED = 4
164 };
165
166 enum selection_type {
167 SEL_REGULAR = 1,
168 SEL_RECTANGULAR = 2
169 };
170
171 enum selection_snap {
172 SNAP_WORD = 1,
173 SNAP_LINE = 2
174 };
175
176 typedef unsigned char uchar;
177 typedef unsigned int uint;
178 typedef unsigned long ulong;
179 typedef unsigned short ushort;
180
181 typedef struct {
182 char c[UTF_SIZ]; /* character code */
183 ushort mode; /* attribute flags */
184 uint32_t fg; /* foreground */
185 uint32_t bg; /* background */
186 } Glyph;
187
188 typedef Glyph *Line;
189
190 typedef struct {
191 Glyph attr; /* current char attributes */
192 int x;
193 int y;
194 char state;
195 } TCursor;
196
197 /* CSI Escape sequence structs */
198 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
199 typedef struct {
200 char buf[ESC_BUF_SIZ]; /* raw string */
201 int len; /* raw string length */
202 char priv;
203 int arg[ESC_ARG_SIZ];
204 int narg; /* nb of args */
205 char mode;
206 } CSIEscape;
207
208 /* STR Escape sequence structs */
209 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
210 typedef struct {
211 char type; /* ESC type ... */
212 char buf[STR_BUF_SIZ]; /* raw string */
213 int len; /* raw string length */
214 char *args[STR_ARG_SIZ];
215 int narg; /* nb of args */
216 } STREscape;
217
218 /* Internal representation of the screen */
219 typedef struct {
220 int row; /* nb row */
221 int col; /* nb col */
222 Line *line; /* screen */
223 Line *alt; /* alternate screen */
224 bool *dirty; /* dirtyness of lines */
225 TCursor c; /* cursor */
226 int top; /* top scroll limit */
227 int bot; /* bottom scroll limit */
228 int mode; /* terminal mode flags */
229 int esc; /* escape state flags */
230 char trantbl[4]; /* charset table translation */
231 int charset; /* current charset */
232 int icharset; /* selected charset for sequence */
233 bool numlock; /* lock numbers in keyboard */
234 bool *tabs;
235 } Term;
236
237 /* Purely graphic info */
238 typedef struct {
239 Display *dpy;
240 Colourmap cmap;
241 Window win;
242 Drawable buf;
243 Atom xembed, wmdeletewin, netwmname, netwmpid;
244 XIM xim;
245 XIC xic;
246 Draw draw;
247 Visual *vis;
248 XSetWindowAttributes attrs;
249 int scr;
250 bool isfixed; /* is fixed geometry? */
251 int fx, fy, fw, fh; /* fixed geometry */
252 int tw, th; /* tty width and height */
253 int w, h; /* window width and height */
254 int ch; /* char height */
255 int cw; /* char width */
256 char state; /* focus, redraw, visible */
257 } XWindow;
258
259 typedef struct {
260 uint b;
261 uint mask;
262 char *s;
263 } Mousekey;
264
265 typedef struct {
266 KeySym k;
267 uint mask;
268 char *s;
269 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
270 signed char appkey; /* application keypad */
271 signed char appcursor; /* application cursor */
272 signed char crlf; /* crlf mode */
273 } Key;
274
275 typedef struct {
276 int mode;
277 int type;
278 int snap;
279 /*
280 * Selection variables:
281 * nb – normalized coordinates of the beginning of the selection
282 * ne – normalized coordinates of the end of the selection
283 * ob – original coordinates of the beginning of the selection
284 * oe – original coordinates of the end of the selection
285 */
286 struct {
287 int x, y;
288 } nb, ne, ob, oe;
289
290 char *clip;
291 Atom xtarget;
292 bool alt;
293 struct timeval tclick1;
294 struct timeval tclick2;
295 } Selection;
296
297 typedef union {
298 int i;
299 unsigned int ui;
300 float f;
301 const void *v;
302 } Arg;
303
304 typedef struct {
305 unsigned int mod;
306 KeySym keysym;
307 void (*func)(const Arg *);
308 const Arg arg;
309 } Shortcut;
310
311 /* function definitions used in config.h */
312 static void clippaste(const Arg *);
313 static void numlock(const Arg *);
314 static void selpaste(const Arg *);
315 static void xzoom(const Arg *);
316
317 /* Config.h for applying patches and the configuration. */
318 #include "config.h"
319
320 /* Font structure */
321 typedef struct {
322 int height;
323 int width;
324 int ascent;
325 int descent;
326 short lbearing;
327 short rbearing;
328 XftFont *match;
329 FcFontSet *set;
330 FcPattern *pattern;
331 } Font;
332
333 /* Drawing Context */
334 typedef struct {
335 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
336 Font font, bfont, ifont, ibfont;
337 GC gc;
338 } DC;
339
340 static void die(const char *, ...);
341 static void draw(void);
342 static void redraw(int);
343 static void drawregion(int, int, int, int);
344 static void execsh(void);
345 static void sigchld(int);
346 static void run(void);
347
348 static void csidump(void);
349 static void csihandle(void);
350 static void csiparse(void);
351 static void csireset(void);
352 static void strdump(void);
353 static void strhandle(void);
354 static void strparse(void);
355 static void strreset(void);
356
357 static int tattrset(int);
358 static void tclearregion(int, int, int, int);
359 static void tcursor(int);
360 static void tdeletechar(int);
361 static void tdeleteline(int);
362 static void tinsertblank(int);
363 static void tinsertblankline(int);
364 static void tmoveto(int, int);
365 static void tmoveato(int x, int y);
366 static void tnew(int, int);
367 static void tnewline(int);
368 static void tputtab(bool);
369 static void tputc(char *, int);
370 static void treset(void);
371 static int tresize(int, int);
372 static void tscrollup(int, int);
373 static void tscrolldown(int, int);
374 static void tsetattr(int*, int);
375 static void tsetchar(char *, Glyph *, int, int);
376 static void tsetscroll(int, int);
377 static void tswapscreen(void);
378 static void tsetdirt(int, int);
379 static void tsetdirtattr(int);
380 static void tsetmode(bool, bool, int *, int);
381 static void tfulldirt(void);
382 static void techo(char *, int);
383 static int32_t tdefcolor(int *, int *, int);
384 static void tselcs(void);
385 static void tdeftran(char);
386 static inline bool match(uint, uint);
387 static void ttynew(void);
388 static void ttyread(void);
389 static void ttyresize(void);
390 static void ttysend(char *, size_t);
391 static void ttywrite(const char *, size_t);
392
393 static void xdraws(char *, Glyph, int, int, int, int);
394 static void xhints(void);
395 static void xclear(int, int, int, int);
396 static void xdrawcursor(void);
397 static void xinit(void);
398 static void xloadcols(void);
399 static int xsetcolorname(int, const char *);
400 static int xloadfont(Font *, FcPattern *);
401 static void xloadfonts(char *, double);
402 static int xloadfontset(Font *);
403 static void xsettitle(char *);
404 static void xresettitle(void);
405 static void xsetpointermotion(int);
406 static void xseturgency(int);
407 static void xsetsel(char*);
408 static void xtermclear(int, int, int, int);
409 static void xunloadfont(Font *f);
410 static void xunloadfonts(void);
411 static void xresize(int, int);
412
413 static void expose(XEvent *);
414 static void visibility(XEvent *);
415 static void unmap(XEvent *);
416 static char *kmap(KeySym, uint);
417 static void kpress(XEvent *);
418 static void cmessage(XEvent *);
419 static void cresize(int, int);
420 static void resize(XEvent *);
421 static void focus(XEvent *);
422 static void brelease(XEvent *);
423 static void bpress(XEvent *);
424 static void bmotion(XEvent *);
425 static void selnotify(XEvent *);
426 static void selclear(XEvent *);
427 static void selrequest(XEvent *);
428
429 static void selinit(void);
430 static void selsort(void);
431 static inline bool selected(int, int);
432 static void selcopy(void);
433 static void selscroll(int, int);
434 static void selsnap(int, int *, int *, int);
435
436 static int utf8decode(char *, long *);
437 static int utf8encode(long *, char *);
438 static int utf8size(char *);
439 static int isfullutf8(char *, int);
440
441 static ssize_t xwrite(int, char *, size_t);
442 static void *xmalloc(size_t);
443 static void *xrealloc(void *, size_t);
444 static char *xstrdup(char *s);
445
446 static void (*handler[LASTEvent])(XEvent *) = {
447 [KeyPress] = kpress,
448 [ClientMessage] = cmessage,
449 [ConfigureNotify] = resize,
450 [VisibilityNotify] = visibility,
451 [UnmapNotify] = unmap,
452 [Expose] = expose,
453 [FocusIn] = focus,
454 [FocusOut] = focus,
455 [MotionNotify] = bmotion,
456 [ButtonPress] = bpress,
457 [ButtonRelease] = brelease,
458 [SelectionClear] = selclear,
459 [SelectionNotify] = selnotify,
460 [SelectionRequest] = selrequest,
461 };
462
463 /* Globals */
464 static DC dc;
465 static XWindow xw;
466 static Term term;
467 static CSIEscape csiescseq;
468 static STREscape strescseq;
469 static int cmdfd;
470 static pid_t pid;
471 static Selection sel;
472 static int iofd = -1;
473 static char **opt_cmd = NULL;
474 static char *opt_io = NULL;
475 static char *opt_title = NULL;
476 static char *opt_embed = NULL;
477 static char *opt_class = NULL;
478 static char *opt_font = NULL;
479 static int oldbutton = 3; /* button event on startup: 3 = release */
480
481 static char *usedfont = NULL;
482 static double usedfontsize = 0;
483
484 /* Font Ring Cache */
485 enum {
486 FRC_NORMAL,
487 FRC_ITALIC,
488 FRC_BOLD,
489 FRC_ITALICBOLD
490 };
491
492 typedef struct {
493 XftFont *font;
494 int flags;
495 } Fontcache;
496
497 /* Fontcache is an array now. A new font will be appended to the array. */
498 static Fontcache frc[16];
499 static int frclen = 0;
500
501 ssize_t
502 xwrite(int fd, char *s, size_t len) {
503 size_t aux = len;
504
505 while(len > 0) {
506 ssize_t r = write(fd, s, len);
507 if(r < 0)
508 return r;
509 len -= r;
510 s += r;
511 }
512 return aux;
513 }
514
515 void *
516 xmalloc(size_t len) {
517 void *p = malloc(len);
518
519 if(!p)
520 die("Out of memory\n");
521
522 return p;
523 }
524
525 void *
526 xrealloc(void *p, size_t len) {
527 if((p = realloc(p, len)) == NULL)
528 die("Out of memory\n");
529
530 return p;
531 }
532
533 char *
534 xstrdup(char *s) {
535 char *p = strdup(s);
536
537 if (!p)
538 die("Out of memory\n");
539
540 return p;
541 }
542
543 int
544 utf8decode(char *s, long *u) {
545 uchar c;
546 int i, n, rtn;
547
548 rtn = 1;
549 c = *s;
550 if(~c & 0x80) { /* 0xxxxxxx */
551 *u = c;
552 return rtn;
553 } else if((c & 0xE0) == 0xC0) { /* 110xxxxx */
554 *u = c & 0x1F;
555 n = 1;
556 } else if((c & 0xF0) == 0xE0) { /* 1110xxxx */
557 *u = c & 0x0F;
558 n = 2;
559 } else if((c & 0xF8) == 0xF0) { /* 11110xxx */
560 *u = c & 0x07;
561 n = 3;
562 } else {
563 goto invalid;
564 }
565
566 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
567 c = *s;
568 if((c & 0xC0) != 0x80) /* 10xxxxxx */
569 goto invalid;
570 *u <<= 6;
571 *u |= c & 0x3F;
572 }
573
574 if((n == 1 && *u < 0x80) ||
575 (n == 2 && *u < 0x800) ||
576 (n == 3 && *u < 0x10000) ||
577 (*u >= 0xD800 && *u <= 0xDFFF)) {
578 goto invalid;
579 }
580
581 return rtn;
582 invalid:
583 *u = 0xFFFD;
584
585 return rtn;
586 }
587
588 int
589 utf8encode(long *u, char *s) {
590 uchar *sp;
591 ulong uc;
592 int i, n;
593
594 sp = (uchar *)s;
595 uc = *u;
596 if(uc < 0x80) {
597 *sp = uc; /* 0xxxxxxx */
598 return 1;
599 } else if(*u < 0x800) {
600 *sp = (uc >> 6) | 0xC0; /* 110xxxxx */
601 n = 1;
602 } else if(uc < 0x10000) {
603 *sp = (uc >> 12) | 0xE0; /* 1110xxxx */
604 n = 2;
605 } else if(uc <= 0x10FFFF) {
606 *sp = (uc >> 18) | 0xF0; /* 11110xxx */
607 n = 3;
608 } else {
609 goto invalid;
610 }
611
612 for(i=n,++sp; i>0; --i,++sp)
613 *sp = ((uc >> 6*(i-1)) & 0x3F) | 0x80; /* 10xxxxxx */
614
615 return n+1;
616 invalid:
617 /* U+FFFD */
618 *s++ = '\xEF';
619 *s++ = '\xBF';
620 *s = '\xBD';
621
622 return 3;
623 }
624
625 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
626 UTF-8 otherwise return 0 */
627 int
628 isfullutf8(char *s, int b) {
629 uchar *c1, *c2, *c3;
630
631 c1 = (uchar *)s;
632 c2 = (uchar *)++s;
633 c3 = (uchar *)++s;
634 if(b < 1) {
635 return 0;
636 } else if((*c1 & 0xE0) == 0xC0 && b == 1) {
637 return 0;
638 } else if((*c1 & 0xF0) == 0xE0 &&
639 ((b == 1) ||
640 ((b == 2) && (*c2 & 0xC0) == 0x80))) {
641 return 0;
642 } else if((*c1 & 0xF8) == 0xF0 &&
643 ((b == 1) ||
644 ((b == 2) && (*c2 & 0xC0) == 0x80) ||
645 ((b == 3) && (*c2 & 0xC0) == 0x80 && (*c3 & 0xC0) == 0x80))) {
646 return 0;
647 } else {
648 return 1;
649 }
650 }
651
652 int
653 utf8size(char *s) {
654 uchar c = *s;
655
656 if(~c & 0x80) {
657 return 1;
658 } else if((c & 0xE0) == 0xC0) {
659 return 2;
660 } else if((c & 0xF0) == 0xE0) {
661 return 3;
662 } else {
663 return 4;
664 }
665 }
666
667 static void
668 selinit(void) {
669 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
670 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
671 sel.mode = 0;
672 sel.ob.x = -1;
673 sel.clip = NULL;
674 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
675 if(sel.xtarget == None)
676 sel.xtarget = XA_STRING;
677 }
678
679 static int
680 x2col(int x) {
681 x -= borderpx;
682 x /= xw.cw;
683
684 return LIMIT(x, 0, term.col-1);
685 }
686
687 static int
688 y2row(int y) {
689 y -= borderpx;
690 y /= xw.ch;
691
692 return LIMIT(y, 0, term.row-1);
693 }
694
695 static void
696 selsort(void) {
697 if(sel.ob.y == sel.oe.y) {
698 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
699 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
700 } else {
701 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
702 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
703 }
704 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
705 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
706 }
707
708 static inline bool
709 selected(int x, int y) {
710 if(sel.ne.y == y && sel.nb.y == y)
711 return BETWEEN(x, sel.nb.x, sel.ne.x);
712
713 if(sel.type == SEL_RECTANGULAR) {
714 return ((sel.nb.y <= y && y <= sel.ne.y)
715 && (sel.nb.x <= x && x <= sel.ne.x));
716 }
717
718 return ((sel.nb.y < y && y < sel.ne.y)
719 || (y == sel.ne.y && x <= sel.ne.x))
720 || (y == sel.nb.y && x >= sel.nb.x
721 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
722 }
723
724 void
725 selsnap(int mode, int *x, int *y, int direction) {
726 int i;
727
728 switch(mode) {
729 case SNAP_WORD:
730 /*
731 * Snap around if the word wraps around at the end or
732 * beginning of a line.
733 */
734 for(;;) {
735 if(direction < 0 && *x <= 0) {
736 if(*y > 0 && term.line[*y - 1][term.col-1].mode
737 & ATTR_WRAP) {
738 *y -= 1;
739 *x = term.col-1;
740 } else {
741 break;
742 }
743 }
744 if(direction > 0 && *x >= term.col-1) {
745 if(*y < term.row-1 && term.line[*y][*x].mode
746 & ATTR_WRAP) {
747 *y += 1;
748 *x = 0;
749 } else {
750 break;
751 }
752 }
753
754 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
755 *x += direction;
756 continue;
757 }
758
759 if(strchr(worddelimiters,
760 term.line[*y][*x+direction].c[0])) {
761 break;
762 }
763
764 *x += direction;
765 }
766 break;
767 case SNAP_LINE:
768 /*
769 * Snap around if the the previous line or the current one
770 * has set ATTR_WRAP at its end. Then the whole next or
771 * previous line will be selected.
772 */
773 *x = (direction < 0) ? 0 : term.col - 1;
774 if(direction < 0 && *y > 0) {
775 for(; *y > 0; *y += direction) {
776 if(!(term.line[*y-1][term.col-1].mode
777 & ATTR_WRAP)) {
778 break;
779 }
780 }
781 } else if(direction > 0 && *y < term.row-1) {
782 for(; *y < term.row; *y += direction) {
783 if(!(term.line[*y][term.col-1].mode
784 & ATTR_WRAP)) {
785 break;
786 }
787 }
788 }
789 break;
790 default:
791 /*
792 * Select the whole line when the end of line is reached.
793 */
794 if(direction > 0) {
795 i = term.col;
796 while(--i > 0 && term.line[*y][i].c[0] == ' ')
797 /* nothing */;
798 if(i > 0 && i < *x)
799 *x = term.col - 1;
800 }
801 break;
802 }
803 }
804
805 void
806 getbuttoninfo(XEvent *e) {
807 int type;
808 uint state = e->xbutton.state &~Button1Mask;
809
810 sel.alt = IS_SET(MODE_ALTSCREEN);
811
812 sel.oe.x = x2col(e->xbutton.x);
813 sel.oe.y = y2row(e->xbutton.y);
814
815 if(sel.ob.y < sel.oe.y
816 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
817 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
818 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
819 } else {
820 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
821 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
822 }
823 selsort();
824
825 sel.type = SEL_REGULAR;
826 for(type = 1; type < LEN(selmasks); ++type) {
827 if(match(selmasks[type], state)) {
828 sel.type = type;
829 break;
830 }
831 }
832 }
833
834 void
835 mousereport(XEvent *e) {
836 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
837 button = e->xbutton.button, state = e->xbutton.state,
838 len;
839 char buf[40];
840 static int ox, oy;
841
842 /* from urxvt */
843 if(e->xbutton.type == MotionNotify) {
844 if(x == ox && y == oy)
845 return;
846 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
847 return;
848 /* MOUSE_MOTION: no reporting if no button is pressed */
849 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
850 return;
851
852 button = oldbutton + 32;
853 ox = x;
854 oy = y;
855 } else {
856 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
857 button = 3;
858 } else {
859 button -= Button1;
860 if(button >= 3)
861 button += 64 - 3;
862 }
863 if(e->xbutton.type == ButtonPress) {
864 oldbutton = button;
865 ox = x;
866 oy = y;
867 } else if(e->xbutton.type == ButtonRelease) {
868 oldbutton = 3;
869 /* MODE_MOUSEX10: no button release reporting */
870 if(IS_SET(MODE_MOUSEX10))
871 return;
872 }
873 }
874
875 if(!IS_SET(MODE_MOUSEX10)) {
876 button += (state & ShiftMask ? 4 : 0)
877 + (state & Mod4Mask ? 8 : 0)
878 + (state & ControlMask ? 16 : 0);
879 }
880
881 len = 0;
882 if(IS_SET(MODE_MOUSESGR)) {
883 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
884 button, x+1, y+1,
885 e->xbutton.type == ButtonRelease ? 'm' : 'M');
886 } else if(x < 223 && y < 223) {
887 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
888 32+button, 32+x+1, 32+y+1);
889 } else {
890 return;
891 }
892
893 ttywrite(buf, len);
894 }
895
896 void
897 bpress(XEvent *e) {
898 struct timeval now;
899 Mousekey *mk;
900
901 if(IS_SET(MODE_MOUSE)) {
902 mousereport(e);
903 return;
904 }
905
906 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
907 if(e->xbutton.button == mk->b
908 && match(mk->mask, e->xbutton.state)) {
909 ttysend(mk->s, strlen(mk->s));
910 return;
911 }
912 }
913
914 if(e->xbutton.button == Button1) {
915 gettimeofday(&now, NULL);
916
917 /* Clear previous selection, logically and visually. */
918 selclear(NULL);
919 sel.mode = 1;
920 sel.type = SEL_REGULAR;
921 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
922 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
923
924 /*
925 * If the user clicks below predefined timeouts specific
926 * snapping behaviour is exposed.
927 */
928 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
929 sel.snap = SNAP_LINE;
930 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
931 sel.snap = SNAP_WORD;
932 } else {
933 sel.snap = 0;
934 }
935 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
936 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
937 selsort();
938
939 /*
940 * Draw selection, unless it's regular and we don't want to
941 * make clicks visible
942 */
943 if(sel.snap != 0) {
944 sel.mode++;
945 tsetdirt(sel.nb.y, sel.ne.y);
946 }
947 sel.tclick2 = sel.tclick1;
948 sel.tclick1 = now;
949 }
950 }
951
952 void
953 selcopy(void) {
954 char *str, *ptr;
955 int x, y, bufsize, size, i, ex;
956 Glyph *gp, *last;
957
958 if(sel.ob.x == -1) {
959 str = NULL;
960 } else {
961 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
962 ptr = str = xmalloc(bufsize);
963
964 /* append every set & selected glyph to the selection */
965 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
966 gp = &term.line[y][0];
967 last = &gp[term.col-1];
968
969 while(last >= gp && !(selected(last - gp, y) &&
970 strcmp(last->c, " ") != 0)) {
971 --last;
972 }
973
974 for(x = 0; gp <= last; x++, ++gp) {
975 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
976 continue;
977
978 size = utf8size(gp->c);
979 memcpy(ptr, gp->c, size);
980 ptr += size;
981 }
982
983 /*
984 * Copy and pasting of line endings is inconsistent
985 * in the inconsistent terminal and GUI world.
986 * The best solution seems like to produce '\n' when
987 * something is copied from st and convert '\n' to
988 * '\r', when something to be pasted is received by
989 * st.
990 * FIXME: Fix the computer world.
991 */
992 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
993 *ptr++ = '\n';
994
995 /*
996 * If the last selected line expands in the selection
997 * after the visible text '\n' is appended.
998 */
999 if(y == sel.ne.y) {
1000 i = term.col;
1001 while(--i > 0 && term.line[y][i].c[0] == ' ')
1002 /* nothing */;
1003 ex = sel.ne.x;
1004 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
1005 ex = sel.nb.x;
1006 if(i < ex)
1007 *ptr++ = '\n';
1008 }
1009 }
1010 *ptr = 0;
1011 }
1012 xsetsel(str);
1013 }
1014
1015 void
1016 selnotify(XEvent *e) {
1017 ulong nitems, ofs, rem;
1018 int format;
1019 uchar *data, *last, *repl;
1020 Atom type;
1021
1022 ofs = 0;
1023 do {
1024 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
1025 False, AnyPropertyType, &type, &format,
1026 &nitems, &rem, &data)) {
1027 fprintf(stderr, "Clipboard allocation failed\n");
1028 return;
1029 }
1030
1031 /*
1032 * As seen in selcopy:
1033 * Line endings are inconsistent in the terminal and GUI world
1034 * copy and pasting. When receiving some selection data,
1035 * replace all '\n' with '\r'.
1036 * FIXME: Fix the computer world.
1037 */
1038 repl = data;
1039 last = data + nitems * format / 8;
1040 while((repl = memchr(repl, '\n', last - repl))) {
1041 *repl++ = '\r';
1042 }
1043
1044 if(IS_SET(MODE_BRCKTPASTE))
1045 ttywrite("\033[200~", 6);
1046 ttysend((char *)data, nitems * format / 8);
1047 if(IS_SET(MODE_BRCKTPASTE))
1048 ttywrite("\033[201~", 6);
1049 XFree(data);
1050 /* number of 32-bit chunks returned */
1051 ofs += nitems * format / 32;
1052 } while(rem > 0);
1053 }
1054
1055 void
1056 selpaste(const Arg *dummy) {
1057 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1058 xw.win, CurrentTime);
1059 }
1060
1061 void
1062 clippaste(const Arg *dummy) {
1063 Atom clipboard;
1064
1065 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1066 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1067 xw.win, CurrentTime);
1068 }
1069
1070 void
1071 selclear(XEvent *e) {
1072 if(sel.ob.x == -1)
1073 return;
1074 sel.ob.x = -1;
1075 tsetdirt(sel.nb.y, sel.ne.y);
1076 }
1077
1078 void
1079 selrequest(XEvent *e) {
1080 XSelectionRequestEvent *xsre;
1081 XSelectionEvent xev;
1082 Atom xa_targets, string;
1083
1084 xsre = (XSelectionRequestEvent *) e;
1085 xev.type = SelectionNotify;
1086 xev.requestor = xsre->requestor;
1087 xev.selection = xsre->selection;
1088 xev.target = xsre->target;
1089 xev.time = xsre->time;
1090 /* reject */
1091 xev.property = None;
1092
1093 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1094 if(xsre->target == xa_targets) {
1095 /* respond with the supported type */
1096 string = sel.xtarget;
1097 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1098 XA_ATOM, 32, PropModeReplace,
1099 (uchar *) &string, 1);
1100 xev.property = xsre->property;
1101 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1102 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1103 xsre->target, 8, PropModeReplace,
1104 (uchar *) sel.clip, strlen(sel.clip));
1105 xev.property = xsre->property;
1106 }
1107
1108 /* all done, send a notification to the listener */
1109 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1110 fprintf(stderr, "Error sending SelectionNotify event\n");
1111 }
1112
1113 void
1114 xsetsel(char *str) {
1115 /* register the selection for both the clipboard and the primary */
1116 Atom clipboard;
1117
1118 free(sel.clip);
1119 sel.clip = str;
1120
1121 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1122
1123 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1124 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1125 }
1126
1127 void
1128 brelease(XEvent *e) {
1129 if(IS_SET(MODE_MOUSE)) {
1130 mousereport(e);
1131 return;
1132 }
1133
1134 if(e->xbutton.button == Button2) {
1135 selpaste(NULL);
1136 } else if(e->xbutton.button == Button1) {
1137 if(sel.mode < 2) {
1138 selclear(NULL);
1139 } else {
1140 getbuttoninfo(e);
1141 selcopy();
1142 }
1143 sel.mode = 0;
1144 tsetdirt(sel.nb.y, sel.ne.y);
1145 }
1146 }
1147
1148 void
1149 bmotion(XEvent *e) {
1150 int oldey, oldex, oldsby, oldsey;
1151
1152 if(IS_SET(MODE_MOUSE)) {
1153 mousereport(e);
1154 return;
1155 }
1156
1157 if(!sel.mode)
1158 return;
1159
1160 sel.mode++;
1161 oldey = sel.oe.y;
1162 oldex = sel.oe.x;
1163 oldsby = sel.nb.y;
1164 oldsey = sel.ne.y;
1165 getbuttoninfo(e);
1166
1167 if(oldey != sel.oe.y || oldex != sel.oe.x)
1168 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1169 }
1170
1171 void
1172 die(const char *errstr, ...) {
1173 va_list ap;
1174
1175 va_start(ap, errstr);
1176 vfprintf(stderr, errstr, ap);
1177 va_end(ap);
1178 exit(EXIT_FAILURE);
1179 }
1180
1181 void
1182 execsh(void) {
1183 char **args;
1184 char *envshell = getenv("SHELL");
1185 const struct passwd *pass = getpwuid(getuid());
1186 char buf[sizeof(long) * 8 + 1];
1187
1188 unsetenv("COLUMNS");
1189 unsetenv("LINES");
1190 unsetenv("TERMCAP");
1191
1192 if(pass) {
1193 setenv("LOGNAME", pass->pw_name, 1);
1194 setenv("USER", pass->pw_name, 1);
1195 setenv("SHELL", pass->pw_shell, 0);
1196 setenv("HOME", pass->pw_dir, 0);
1197 }
1198
1199 snprintf(buf, sizeof(buf), "%lu", xw.win);
1200 setenv("WINDOWID", buf, 1);
1201
1202 signal(SIGCHLD, SIG_DFL);
1203 signal(SIGHUP, SIG_DFL);
1204 signal(SIGINT, SIG_DFL);
1205 signal(SIGQUIT, SIG_DFL);
1206 signal(SIGTERM, SIG_DFL);
1207 signal(SIGALRM, SIG_DFL);
1208
1209 DEFAULT(envshell, shell);
1210 setenv("TERM", termname, 1);
1211 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1212 execvp(args[0], args);
1213 exit(EXIT_FAILURE);
1214 }
1215
1216 void
1217 sigchld(int a) {
1218 int stat = 0;
1219
1220 if(waitpid(pid, &stat, 0) < 0)
1221 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1222
1223 if(WIFEXITED(stat)) {
1224 exit(WEXITSTATUS(stat));
1225 } else {
1226 exit(EXIT_FAILURE);
1227 }
1228 }
1229
1230 void
1231 ttynew(void) {
1232 int m, s;
1233 struct winsize w = {term.row, term.col, 0, 0};
1234
1235 /* seems to work fine on linux, openbsd and freebsd */
1236 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1237 die("openpty failed: %s\n", SERRNO);
1238
1239 switch(pid = fork()) {
1240 case -1:
1241 die("fork failed\n");
1242 break;
1243 case 0:
1244 setsid(); /* create a new process group */
1245 dup2(s, STDIN_FILENO);
1246 dup2(s, STDOUT_FILENO);
1247 dup2(s, STDERR_FILENO);
1248 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1249 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1250 close(s);
1251 close(m);
1252 execsh();
1253 break;
1254 default:
1255 close(s);
1256 cmdfd = m;
1257 signal(SIGCHLD, sigchld);
1258 if(opt_io) {
1259 iofd = (!strcmp(opt_io, "-")) ?
1260 STDOUT_FILENO :
1261 open(opt_io, O_WRONLY | O_CREAT, 0666);
1262 if(iofd < 0) {
1263 fprintf(stderr, "Error opening %s:%s\n",
1264 opt_io, strerror(errno));
1265 }
1266 }
1267 }
1268 }
1269
1270 void
1271 dump(char c) {
1272 static int col;
1273
1274 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1275 if(++col % 10 == 0)
1276 fprintf(stderr, "\n");
1277 }
1278
1279 void
1280 ttyread(void) {
1281 static char buf[BUFSIZ];
1282 static int buflen = 0;
1283 char *ptr;
1284 char s[UTF_SIZ];
1285 int charsize; /* size of utf8 char in bytes */
1286 long utf8c;
1287 int ret;
1288
1289 /* append read bytes to unprocessed bytes */
1290 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1291 die("Couldn't read from shell: %s\n", SERRNO);
1292
1293 /* process every complete utf8 char */
1294 buflen += ret;
1295 ptr = buf;
1296 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1297 charsize = utf8decode(ptr, &utf8c);
1298 utf8encode(&utf8c, s);
1299 tputc(s, charsize);
1300 ptr += charsize;
1301 buflen -= charsize;
1302 }
1303
1304 /* keep any uncomplete utf8 char for the next call */
1305 memmove(buf, ptr, buflen);
1306 }
1307
1308 void
1309 ttywrite(const char *s, size_t n) {
1310 if(write(cmdfd, s, n) == -1)
1311 die("write error on tty: %s\n", SERRNO);
1312 }
1313
1314 void
1315 ttysend(char *s, size_t n) {
1316 ttywrite(s, n);
1317 if(IS_SET(MODE_ECHO))
1318 techo(s, n);
1319 }
1320
1321 void
1322 ttyresize(void) {
1323 struct winsize w;
1324
1325 w.ws_row = term.row;
1326 w.ws_col = term.col;
1327 w.ws_xpixel = xw.tw;
1328 w.ws_ypixel = xw.th;
1329 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1330 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1331 }
1332
1333 int
1334 tattrset(int attr) {
1335 int i, j;
1336
1337 for(i = 0; i < term.row-1; i++) {
1338 for(j = 0; j < term.col-1; j++) {
1339 if(term.line[i][j].mode & attr)
1340 return 1;
1341 }
1342 }
1343
1344 return 0;
1345 }
1346
1347 void
1348 tsetdirt(int top, int bot) {
1349 int i;
1350
1351 LIMIT(top, 0, term.row-1);
1352 LIMIT(bot, 0, term.row-1);
1353
1354 for(i = top; i <= bot; i++)
1355 term.dirty[i] = 1;
1356 }
1357
1358 void
1359 tsetdirtattr(int attr) {
1360 int i, j;
1361
1362 for(i = 0; i < term.row-1; i++) {
1363 for(j = 0; j < term.col-1; j++) {
1364 if(term.line[i][j].mode & attr) {
1365 tsetdirt(i, i);
1366 break;
1367 }
1368 }
1369 }
1370 }
1371
1372 void
1373 tfulldirt(void) {
1374 tsetdirt(0, term.row-1);
1375 }
1376
1377 void
1378 tcursor(int mode) {
1379 static TCursor c[2];
1380 bool alt = IS_SET(MODE_ALTSCREEN);
1381
1382 if(mode == CURSOR_SAVE) {
1383 c[alt] = term.c;
1384 } else if(mode == CURSOR_LOAD) {
1385 term.c = c[alt];
1386 tmoveto(c[alt].x, c[alt].y);
1387 }
1388 }
1389
1390 void
1391 treset(void) {
1392 uint i;
1393
1394 term.c = (TCursor){{
1395 .mode = ATTR_NULL,
1396 .fg = defaultfg,
1397 .bg = defaultbg
1398 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1399
1400 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1401 for(i = tabspaces; i < term.col; i += tabspaces)
1402 term.tabs[i] = 1;
1403 term.top = 0;
1404 term.bot = term.row - 1;
1405 term.mode = MODE_WRAP;
1406 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1407 term.charset = 0;
1408
1409 tclearregion(0, 0, term.col-1, term.row-1);
1410 tmoveto(0, 0);
1411 tcursor(CURSOR_SAVE);
1412 }
1413
1414 void
1415 tnew(int col, int row) {
1416 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1417 tresize(col, row);
1418 term.numlock = 1;
1419
1420 treset();
1421 }
1422
1423 void
1424 tswapscreen(void) {
1425 Line *tmp = term.line;
1426
1427 term.line = term.alt;
1428 term.alt = tmp;
1429 term.mode ^= MODE_ALTSCREEN;
1430 tfulldirt();
1431 }
1432
1433 void
1434 tscrolldown(int orig, int n) {
1435 int i;
1436 Line temp;
1437
1438 LIMIT(n, 0, term.bot-orig+1);
1439
1440 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1441
1442 for(i = term.bot; i >= orig+n; i--) {
1443 temp = term.line[i];
1444 term.line[i] = term.line[i-n];
1445 term.line[i-n] = temp;
1446
1447 term.dirty[i] = 1;
1448 term.dirty[i-n] = 1;
1449 }
1450
1451 selscroll(orig, n);
1452 }
1453
1454 void
1455 tscrollup(int orig, int n) {
1456 int i;
1457 Line temp;
1458 LIMIT(n, 0, term.bot-orig+1);
1459
1460 tclearregion(0, orig, term.col-1, orig+n-1);
1461
1462 for(i = orig; i <= term.bot-n; i++) {
1463 temp = term.line[i];
1464 term.line[i] = term.line[i+n];
1465 term.line[i+n] = temp;
1466
1467 term.dirty[i] = 1;
1468 term.dirty[i+n] = 1;
1469 }
1470
1471 selscroll(orig, -n);
1472 }
1473
1474 void
1475 selscroll(int orig, int n) {
1476 if(sel.ob.x == -1)
1477 return;
1478
1479 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1480 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1481 selclear(NULL);
1482 return;
1483 }
1484 if(sel.type == SEL_RECTANGULAR) {
1485 if(sel.ob.y < term.top)
1486 sel.ob.y = term.top;
1487 if(sel.oe.y > term.bot)
1488 sel.oe.y = term.bot;
1489 } else {
1490 if(sel.ob.y < term.top) {
1491 sel.ob.y = term.top;
1492 sel.ob.x = 0;
1493 }
1494 if(sel.oe.y > term.bot) {
1495 sel.oe.y = term.bot;
1496 sel.oe.x = term.col;
1497 }
1498 }
1499 selsort();
1500 }
1501 }
1502
1503 void
1504 tnewline(int first_col) {
1505 int y = term.c.y;
1506
1507 if(y == term.bot) {
1508 tscrollup(term.top, 1);
1509 } else {
1510 y++;
1511 }
1512 tmoveto(first_col ? 0 : term.c.x, y);
1513 }
1514
1515 void
1516 csiparse(void) {
1517 char *p = csiescseq.buf, *np;
1518 long int v;
1519
1520 csiescseq.narg = 0;
1521 if(*p == '?') {
1522 csiescseq.priv = 1;
1523 p++;
1524 }
1525
1526 csiescseq.buf[csiescseq.len] = '\0';
1527 while(p < csiescseq.buf+csiescseq.len) {
1528 np = NULL;
1529 v = strtol(p, &np, 10);
1530 if(np == p)
1531 v = 0;
1532 if(v == LONG_MAX || v == LONG_MIN)
1533 v = -1;
1534 csiescseq.arg[csiescseq.narg++] = v;
1535 p = np;
1536 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1537 break;
1538 p++;
1539 }
1540 csiescseq.mode = *p;
1541 }
1542
1543 /* for absolute user moves, when decom is set */
1544 void
1545 tmoveato(int x, int y) {
1546 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1547 }
1548
1549 void
1550 tmoveto(int x, int y) {
1551 int miny, maxy;
1552
1553 if(term.c.state & CURSOR_ORIGIN) {
1554 miny = term.top;
1555 maxy = term.bot;
1556 } else {
1557 miny = 0;
1558 maxy = term.row - 1;
1559 }
1560 LIMIT(x, 0, term.col-1);
1561 LIMIT(y, miny, maxy);
1562 term.c.state &= ~CURSOR_WRAPNEXT;
1563 term.c.x = x;
1564 term.c.y = y;
1565 }
1566
1567 void
1568 tsetchar(char *c, Glyph *attr, int x, int y) {
1569 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1570 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1571 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1572 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1573 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1574 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1575 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1576 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1577 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1578 };
1579
1580 /*
1581 * The table is proudly stolen from rxvt.
1582 */
1583 if(attr->mode & ATTR_GFX) {
1584 if(c[0] >= 0x41 && c[0] <= 0x7e
1585 && vt100_0[c[0] - 0x41]) {
1586 c = vt100_0[c[0] - 0x41];
1587 }
1588 }
1589
1590 if(term.line[y][x].mode & ATTR_WIDE) {
1591 if(x+1 < term.col) {
1592 term.line[y][x+1].c[0] = ' ';
1593 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1594 }
1595 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1596 term.line[y][x-1].c[0] = ' ';
1597 term.line[y][x-1].mode &= ~ATTR_WIDE;
1598 }
1599
1600 term.dirty[y] = 1;
1601 term.line[y][x] = *attr;
1602 memcpy(term.line[y][x].c, c, UTF_SIZ);
1603 }
1604
1605 void
1606 tclearregion(int x1, int y1, int x2, int y2) {
1607 int x, y, temp;
1608
1609 if(x1 > x2)
1610 temp = x1, x1 = x2, x2 = temp;
1611 if(y1 > y2)
1612 temp = y1, y1 = y2, y2 = temp;
1613
1614 LIMIT(x1, 0, term.col-1);
1615 LIMIT(x2, 0, term.col-1);
1616 LIMIT(y1, 0, term.row-1);
1617 LIMIT(y2, 0, term.row-1);
1618
1619 for(y = y1; y <= y2; y++) {
1620 term.dirty[y] = 1;
1621 for(x = x1; x <= x2; x++) {
1622 if(selected(x, y))
1623 selclear(NULL);
1624 term.line[y][x] = term.c.attr;
1625 memcpy(term.line[y][x].c, " ", 2);
1626 }
1627 }
1628 }
1629
1630 void
1631 tdeletechar(int n) {
1632 int src = term.c.x + n;
1633 int dst = term.c.x;
1634 int size = term.col - src;
1635
1636 term.dirty[term.c.y] = 1;
1637
1638 if(src >= term.col) {
1639 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1640 return;
1641 }
1642
1643 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1644 size * sizeof(Glyph));
1645 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1646 }
1647
1648 void
1649 tinsertblank(int n) {
1650 int src = term.c.x;
1651 int dst = src + n;
1652 int size = term.col - dst;
1653
1654 term.dirty[term.c.y] = 1;
1655
1656 if(dst >= term.col) {
1657 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1658 return;
1659 }
1660
1661 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1662 size * sizeof(Glyph));
1663 tclearregion(src, term.c.y, dst - 1, term.c.y);
1664 }
1665
1666 void
1667 tinsertblankline(int n) {
1668 if(term.c.y < term.top || term.c.y > term.bot)
1669 return;
1670
1671 tscrolldown(term.c.y, n);
1672 }
1673
1674 void
1675 tdeleteline(int n) {
1676 if(term.c.y < term.top || term.c.y > term.bot)
1677 return;
1678
1679 tscrollup(term.c.y, n);
1680 }
1681
1682 int32_t
1683 tdefcolor(int *attr, int *npar, int l) {
1684 int32_t idx = -1;
1685 uint r, g, b;
1686
1687 switch (attr[*npar + 1]) {
1688 case 2: /* direct colour in RGB space */
1689 if (*npar + 4 >= l) {
1690 fprintf(stderr,
1691 "erresc(38): Incorrect number of parameters (%d)\n",
1692 *npar);
1693 break;
1694 }
1695 r = attr[*npar + 2];
1696 g = attr[*npar + 3];
1697 b = attr[*npar + 4];
1698 *npar += 4;
1699 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1700 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1701 r, g, b);
1702 else
1703 idx = TRUECOLOR(r, g, b);
1704 break;
1705 case 5: /* indexed colour */
1706 if (*npar + 2 >= l) {
1707 fprintf(stderr,
1708 "erresc(38): Incorrect number of parameters (%d)\n",
1709 *npar);
1710 break;
1711 }
1712 *npar += 2;
1713 if(!BETWEEN(attr[*npar], 0, 255))
1714 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1715 else
1716 idx = attr[*npar];
1717 break;
1718 case 0: /* implemented defined (only foreground) */
1719 case 1: /* transparent */
1720 case 3: /* direct colour in CMY space */
1721 case 4: /* direct colour in CMYK space */
1722 default:
1723 fprintf(stderr,
1724 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1725 }
1726
1727 return idx;
1728 }
1729
1730 void
1731 tsetattr(int *attr, int l) {
1732 int i;
1733 int32_t idx;
1734
1735 for(i = 0; i < l; i++) {
1736 switch(attr[i]) {
1737 case 0:
1738 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1739 | ATTR_BOLD | ATTR_ITALIC \
1740 | ATTR_BLINK);
1741 term.c.attr.fg = defaultfg;
1742 term.c.attr.bg = defaultbg;
1743 break;
1744 case 1:
1745 term.c.attr.mode |= ATTR_BOLD;
1746 break;
1747 case 3:
1748 term.c.attr.mode |= ATTR_ITALIC;
1749 break;
1750 case 4:
1751 term.c.attr.mode |= ATTR_UNDERLINE;
1752 break;
1753 case 5: /* slow blink */
1754 case 6: /* rapid blink */
1755 term.c.attr.mode |= ATTR_BLINK;
1756 break;
1757 case 7:
1758 term.c.attr.mode |= ATTR_REVERSE;
1759 break;
1760 case 21:
1761 case 22:
1762 term.c.attr.mode &= ~ATTR_BOLD;
1763 break;
1764 case 23:
1765 term.c.attr.mode &= ~ATTR_ITALIC;
1766 break;
1767 case 24:
1768 term.c.attr.mode &= ~ATTR_UNDERLINE;
1769 break;
1770 case 25:
1771 case 26:
1772 term.c.attr.mode &= ~ATTR_BLINK;
1773 break;
1774 case 27:
1775 term.c.attr.mode &= ~ATTR_REVERSE;
1776 break;
1777 case 38:
1778 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1779 term.c.attr.fg = idx;
1780 break;
1781 case 39:
1782 term.c.attr.fg = defaultfg;
1783 break;
1784 case 48:
1785 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1786 term.c.attr.bg = idx;
1787 break;
1788 case 49:
1789 term.c.attr.bg = defaultbg;
1790 break;
1791 default:
1792 if(BETWEEN(attr[i], 30, 37)) {
1793 term.c.attr.fg = attr[i] - 30;
1794 } else if(BETWEEN(attr[i], 40, 47)) {
1795 term.c.attr.bg = attr[i] - 40;
1796 } else if(BETWEEN(attr[i], 90, 97)) {
1797 term.c.attr.fg = attr[i] - 90 + 8;
1798 } else if(BETWEEN(attr[i], 100, 107)) {
1799 term.c.attr.bg = attr[i] - 100 + 8;
1800 } else {
1801 fprintf(stderr,
1802 "erresc(default): gfx attr %d unknown\n",
1803 attr[i]), csidump();
1804 }
1805 break;
1806 }
1807 }
1808 }
1809
1810 void
1811 tsetscroll(int t, int b) {
1812 int temp;
1813
1814 LIMIT(t, 0, term.row-1);
1815 LIMIT(b, 0, term.row-1);
1816 if(t > b) {
1817 temp = t;
1818 t = b;
1819 b = temp;
1820 }
1821 term.top = t;
1822 term.bot = b;
1823 }
1824
1825 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1826
1827 void
1828 tsetmode(bool priv, bool set, int *args, int narg) {
1829 int *lim, mode;
1830 bool alt;
1831
1832 for(lim = args + narg; args < lim; ++args) {
1833 if(priv) {
1834 switch(*args) {
1835 break;
1836 case 1: /* DECCKM -- Cursor key */
1837 MODBIT(term.mode, set, MODE_APPCURSOR);
1838 break;
1839 case 5: /* DECSCNM -- Reverse video */
1840 mode = term.mode;
1841 MODBIT(term.mode, set, MODE_REVERSE);
1842 if(mode != term.mode)
1843 redraw(REDRAW_TIMEOUT);
1844 break;
1845 case 6: /* DECOM -- Origin */
1846 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1847 tmoveato(0, 0);
1848 break;
1849 case 7: /* DECAWM -- Auto wrap */
1850 MODBIT(term.mode, set, MODE_WRAP);
1851 break;
1852 case 0: /* Error (IGNORED) */
1853 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1854 case 3: /* DECCOLM -- Column (IGNORED) */
1855 case 4: /* DECSCLM -- Scroll (IGNORED) */
1856 case 8: /* DECARM -- Auto repeat (IGNORED) */
1857 case 18: /* DECPFF -- Printer feed (IGNORED) */
1858 case 19: /* DECPEX -- Printer extent (IGNORED) */
1859 case 42: /* DECNRCM -- National characters (IGNORED) */
1860 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1861 break;
1862 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1863 MODBIT(term.mode, !set, MODE_HIDE);
1864 break;
1865 case 9: /* X10 mouse compatibility mode */
1866 xsetpointermotion(0);
1867 MODBIT(term.mode, 0, MODE_MOUSE);
1868 MODBIT(term.mode, set, MODE_MOUSEX10);
1869 break;
1870 case 1000: /* 1000: report button press */
1871 xsetpointermotion(0);
1872 MODBIT(term.mode, 0, MODE_MOUSE);
1873 MODBIT(term.mode, set, MODE_MOUSEBTN);
1874 break;
1875 case 1002: /* 1002: report motion on button press */
1876 xsetpointermotion(0);
1877 MODBIT(term.mode, 0, MODE_MOUSE);
1878 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1879 break;
1880 case 1003: /* 1003: enable all mouse motions */
1881 xsetpointermotion(set);
1882 MODBIT(term.mode, 0, MODE_MOUSE);
1883 MODBIT(term.mode, set, MODE_MOUSEMANY);
1884 break;
1885 case 1004: /* 1004: send focus events to tty */
1886 MODBIT(term.mode, set, MODE_FOCUS);
1887 break;
1888 case 1006: /* 1006: extended reporting mode */
1889 MODBIT(term.mode, set, MODE_MOUSESGR);
1890 break;
1891 case 1034:
1892 MODBIT(term.mode, set, MODE_8BIT);
1893 break;
1894 case 1049: /* swap screen & set/restore cursor as xterm */
1895 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1896 case 47: /* swap screen */
1897 case 1047:
1898 if (!allowaltscreen)
1899 break;
1900 alt = IS_SET(MODE_ALTSCREEN);
1901 if(alt) {
1902 tclearregion(0, 0, term.col-1,
1903 term.row-1);
1904 }
1905 if(set ^ alt) /* set is always 1 or 0 */
1906 tswapscreen();
1907 if(*args != 1049)
1908 break;
1909 /* FALLTRU */
1910 case 1048:
1911 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1912 break;
1913 case 2004: /* 2004: bracketed paste mode */
1914 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1915 break;
1916 /* Not implemented mouse modes. See comments there. */
1917 case 1001: /* mouse highlight mode; can hang the
1918 terminal by design when implemented. */
1919 case 1005: /* UTF-8 mouse mode; will confuse
1920 applications not supporting UTF-8
1921 and luit. */
1922 case 1015: /* urxvt mangled mouse mode; incompatible
1923 and can be mistaken for other control
1924 codes. */
1925 default:
1926 fprintf(stderr,
1927 "erresc: unknown private set/reset mode %d\n",
1928 *args);
1929 break;
1930 }
1931 } else {
1932 switch(*args) {
1933 case 0: /* Error (IGNORED) */
1934 break;
1935 case 2: /* KAM -- keyboard action */
1936 MODBIT(term.mode, set, MODE_KBDLOCK);
1937 break;
1938 case 4: /* IRM -- Insertion-replacement */
1939 MODBIT(term.mode, set, MODE_INSERT);
1940 break;
1941 case 12: /* SRM -- Send/Receive */
1942 MODBIT(term.mode, !set, MODE_ECHO);
1943 break;
1944 case 20: /* LNM -- Linefeed/new line */
1945 MODBIT(term.mode, set, MODE_CRLF);
1946 break;
1947 default:
1948 fprintf(stderr,
1949 "erresc: unknown set/reset mode %d\n",
1950 *args);
1951 break;
1952 }
1953 }
1954 }
1955 }
1956
1957 void
1958 csihandle(void) {
1959 char buf[40];
1960 int len;
1961
1962 switch(csiescseq.mode) {
1963 default:
1964 unknown:
1965 fprintf(stderr, "erresc: unknown csi ");
1966 csidump();
1967 /* die(""); */
1968 break;
1969 case '@': /* ICH -- Insert <n> blank char */
1970 DEFAULT(csiescseq.arg[0], 1);
1971 tinsertblank(csiescseq.arg[0]);
1972 break;
1973 case 'A': /* CUU -- Cursor <n> Up */
1974 DEFAULT(csiescseq.arg[0], 1);
1975 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1976 break;
1977 case 'B': /* CUD -- Cursor <n> Down */
1978 case 'e': /* VPR --Cursor <n> Down */
1979 DEFAULT(csiescseq.arg[0], 1);
1980 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1981 break;
1982 case 'c': /* DA -- Device Attributes */
1983 if(csiescseq.arg[0] == 0)
1984 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1985 break;
1986 case 'C': /* CUF -- Cursor <n> Forward */
1987 case 'a': /* HPR -- Cursor <n> Forward */
1988 DEFAULT(csiescseq.arg[0], 1);
1989 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1990 break;
1991 case 'D': /* CUB -- Cursor <n> Backward */
1992 DEFAULT(csiescseq.arg[0], 1);
1993 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1994 break;
1995 case 'E': /* CNL -- Cursor <n> Down and first col */
1996 DEFAULT(csiescseq.arg[0], 1);
1997 tmoveto(0, term.c.y+csiescseq.arg[0]);
1998 break;
1999 case 'F': /* CPL -- Cursor <n> Up and first col */
2000 DEFAULT(csiescseq.arg[0], 1);
2001 tmoveto(0, term.c.y-csiescseq.arg[0]);
2002 break;
2003 case 'g': /* TBC -- Tabulation clear */
2004 switch(csiescseq.arg[0]) {
2005 case 0: /* clear current tab stop */
2006 term.tabs[term.c.x] = 0;
2007 break;
2008 case 3: /* clear all the tabs */
2009 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2010 break;
2011 default:
2012 goto unknown;
2013 }
2014 break;
2015 case 'G': /* CHA -- Move to <col> */
2016 case '`': /* HPA */
2017 DEFAULT(csiescseq.arg[0], 1);
2018 tmoveto(csiescseq.arg[0]-1, term.c.y);
2019 break;
2020 case 'H': /* CUP -- Move to <row> <col> */
2021 case 'f': /* HVP */
2022 DEFAULT(csiescseq.arg[0], 1);
2023 DEFAULT(csiescseq.arg[1], 1);
2024 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2025 break;
2026 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2027 DEFAULT(csiescseq.arg[0], 1);
2028 while(csiescseq.arg[0]--)
2029 tputtab(1);
2030 break;
2031 case 'J': /* ED -- Clear screen */
2032 selclear(NULL);
2033 switch(csiescseq.arg[0]) {
2034 case 0: /* below */
2035 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2036 if(term.c.y < term.row-1) {
2037 tclearregion(0, term.c.y+1, term.col-1,
2038 term.row-1);
2039 }
2040 break;
2041 case 1: /* above */
2042 if(term.c.y > 1)
2043 tclearregion(0, 0, term.col-1, term.c.y-1);
2044 tclearregion(0, term.c.y, term.c.x, term.c.y);
2045 break;
2046 case 2: /* all */
2047 tclearregion(0, 0, term.col-1, term.row-1);
2048 break;
2049 default:
2050 goto unknown;
2051 }
2052 break;
2053 case 'K': /* EL -- Clear line */
2054 switch(csiescseq.arg[0]) {
2055 case 0: /* right */
2056 tclearregion(term.c.x, term.c.y, term.col-1,
2057 term.c.y);
2058 break;
2059 case 1: /* left */
2060 tclearregion(0, term.c.y, term.c.x, term.c.y);
2061 break;
2062 case 2: /* all */
2063 tclearregion(0, term.c.y, term.col-1, term.c.y);
2064 break;
2065 }
2066 break;
2067 case 'S': /* SU -- Scroll <n> line up */
2068 DEFAULT(csiescseq.arg[0], 1);
2069 tscrollup(term.top, csiescseq.arg[0]);
2070 break;
2071 case 'T': /* SD -- Scroll <n> line down */
2072 DEFAULT(csiescseq.arg[0], 1);
2073 tscrolldown(term.top, csiescseq.arg[0]);
2074 break;
2075 case 'L': /* IL -- Insert <n> blank lines */
2076 DEFAULT(csiescseq.arg[0], 1);
2077 tinsertblankline(csiescseq.arg[0]);
2078 break;
2079 case 'l': /* RM -- Reset Mode */
2080 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2081 break;
2082 case 'M': /* DL -- Delete <n> lines */
2083 DEFAULT(csiescseq.arg[0], 1);
2084 tdeleteline(csiescseq.arg[0]);
2085 break;
2086 case 'X': /* ECH -- Erase <n> char */
2087 DEFAULT(csiescseq.arg[0], 1);
2088 tclearregion(term.c.x, term.c.y,
2089 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2090 break;
2091 case 'P': /* DCH -- Delete <n> char */
2092 DEFAULT(csiescseq.arg[0], 1);
2093 tdeletechar(csiescseq.arg[0]);
2094 break;
2095 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2096 DEFAULT(csiescseq.arg[0], 1);
2097 while(csiescseq.arg[0]--)
2098 tputtab(0);
2099 break;
2100 case 'd': /* VPA -- Move to <row> */
2101 DEFAULT(csiescseq.arg[0], 1);
2102 tmoveato(term.c.x, csiescseq.arg[0]-1);
2103 break;
2104 case 'h': /* SM -- Set terminal mode */
2105 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2106 break;
2107 case 'm': /* SGR -- Terminal attribute (color) */
2108 tsetattr(csiescseq.arg, csiescseq.narg);
2109 break;
2110 case 'n': /* DSR – Device Status Report (cursor position) */
2111 if (csiescseq.arg[0] == 6) {
2112 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2113 term.c.y+1, term.c.x+1);
2114 ttywrite(buf, len);
2115 break;
2116 }
2117 case 'r': /* DECSTBM -- Set Scrolling Region */
2118 if(csiescseq.priv) {
2119 goto unknown;
2120 } else {
2121 DEFAULT(csiescseq.arg[0], 1);
2122 DEFAULT(csiescseq.arg[1], term.row);
2123 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2124 tmoveato(0, 0);
2125 }
2126 break;
2127 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2128 tcursor(CURSOR_SAVE);
2129 break;
2130 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2131 tcursor(CURSOR_LOAD);
2132 break;
2133 }
2134 }
2135
2136 void
2137 csidump(void) {
2138 int i;
2139 uint c;
2140
2141 printf("ESC[");
2142 for(i = 0; i < csiescseq.len; i++) {
2143 c = csiescseq.buf[i] & 0xff;
2144 if(isprint(c)) {
2145 putchar(c);
2146 } else if(c == '\n') {
2147 printf("(\\n)");
2148 } else if(c == '\r') {
2149 printf("(\\r)");
2150 } else if(c == 0x1b) {
2151 printf("(\\e)");
2152 } else {
2153 printf("(%02x)", c);
2154 }
2155 }
2156 putchar('\n');
2157 }
2158
2159 void
2160 csireset(void) {
2161 memset(&csiescseq, 0, sizeof(csiescseq));
2162 }
2163
2164 void
2165 strhandle(void) {
2166 char *p = NULL;
2167 int j, narg, par;
2168
2169 strparse();
2170 narg = strescseq.narg;
2171 par = atoi(strescseq.args[0]);
2172
2173 switch(strescseq.type) {
2174 case ']': /* OSC -- Operating System Command */
2175 switch(par) {
2176 case 0:
2177 case 1:
2178 case 2:
2179 if(narg > 1)
2180 xsettitle(strescseq.args[1]);
2181 return;
2182 case 4: /* color set */
2183 if(narg < 3)
2184 break;
2185 p = strescseq.args[2];
2186 /* fall through */
2187 case 104: /* color reset, here p = NULL */
2188 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2189 if (!xsetcolorname(j, p)) {
2190 fprintf(stderr, "erresc: invalid color %s\n", p);
2191 } else {
2192 /*
2193 * TODO if defaultbg color is changed, borders
2194 * are dirty
2195 */
2196 redraw(0);
2197 }
2198 return;
2199 }
2200 break;
2201 case 'k': /* old title set compatibility */
2202 xsettitle(strescseq.args[0]);
2203 return;
2204 case 'P': /* DSC -- Device Control String */
2205 case '_': /* APC -- Application Program Command */
2206 case '^': /* PM -- Privacy Message */
2207 return;
2208 }
2209
2210 fprintf(stderr, "erresc: unknown str ");
2211 strdump();
2212 }
2213
2214 void
2215 strparse(void) {
2216 char *p = strescseq.buf;
2217
2218 strescseq.narg = 0;
2219 strescseq.buf[strescseq.len] = '\0';
2220 while(p && strescseq.narg < STR_ARG_SIZ)
2221 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2222 }
2223
2224 void
2225 strdump(void) {
2226 int i;
2227 uint c;
2228
2229 printf("ESC%c", strescseq.type);
2230 for(i = 0; i < strescseq.len; i++) {
2231 c = strescseq.buf[i] & 0xff;
2232 if(c == '\0') {
2233 return;
2234 } else if(isprint(c)) {
2235 putchar(c);
2236 } else if(c == '\n') {
2237 printf("(\\n)");
2238 } else if(c == '\r') {
2239 printf("(\\r)");
2240 } else if(c == 0x1b) {
2241 printf("(\\e)");
2242 } else {
2243 printf("(%02x)", c);
2244 }
2245 }
2246 printf("ESC\\\n");
2247 }
2248
2249 void
2250 strreset(void) {
2251 memset(&strescseq, 0, sizeof(strescseq));
2252 }
2253
2254 void
2255 tputtab(bool forward) {
2256 uint x = term.c.x;
2257
2258 if(forward) {
2259 if(x == term.col)
2260 return;
2261 for(++x; x < term.col && !term.tabs[x]; ++x)
2262 /* nothing */ ;
2263 } else {
2264 if(x == 0)
2265 return;
2266 for(--x; x > 0 && !term.tabs[x]; --x)
2267 /* nothing */ ;
2268 }
2269 tmoveto(x, term.c.y);
2270 }
2271
2272 void
2273 techo(char *buf, int len) {
2274 for(; len > 0; buf++, len--) {
2275 char c = *buf;
2276
2277 if(c == '\033') { /* escape */
2278 tputc("^", 1);
2279 tputc("[", 1);
2280 } else if(c < '\x20') { /* control code */
2281 if(c != '\n' && c != '\r' && c != '\t') {
2282 c |= '\x40';
2283 tputc("^", 1);
2284 }
2285 tputc(&c, 1);
2286 } else {
2287 break;
2288 }
2289 }
2290 if(len)
2291 tputc(buf, len);
2292 }
2293
2294 void
2295 tdeftran(char ascii) {
2296 char c, (*bp)[2];
2297 static char tbl[][2] = {
2298 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2299 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2300 {'5', CS_FIN}, {'C', CS_FIN},
2301 {0, 0}
2302 };
2303
2304 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2305 /* nothing */;
2306
2307 if (c == 0)
2308 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2309 else
2310 term.trantbl[term.icharset] = (*bp)[1];
2311 }
2312
2313 void
2314 tselcs(void) {
2315 if (term.trantbl[term.charset] == CS_GRAPHIC0)
2316 term.c.attr.mode |= ATTR_GFX;
2317 else
2318 term.c.attr.mode &= ~ATTR_GFX;
2319 }
2320
2321 void
2322 tputc(char *c, int len) {
2323 uchar ascii = *c;
2324 bool control = ascii < '\x20' || ascii == 0177;
2325 long u8char;
2326 int width;
2327
2328 if(len == 1) {
2329 width = 1;
2330 } else {
2331 utf8decode(c, &u8char);
2332 width = wcwidth(u8char);
2333 }
2334
2335 if(iofd != -1) {
2336 if(xwrite(iofd, c, len) < 0) {
2337 fprintf(stderr, "Error writing in %s:%s\n",
2338 opt_io, strerror(errno));
2339 close(iofd);
2340 iofd = -1;
2341 }
2342 }
2343
2344 /*
2345 * STR sequences must be checked before anything else
2346 * because it can use some control codes as part of the sequence.
2347 */
2348 if(term.esc & ESC_STR) {
2349 switch(ascii) {
2350 case '\033':
2351 term.esc = ESC_START | ESC_STR_END;
2352 break;
2353 case '\a': /* backwards compatibility to xterm */
2354 term.esc = 0;
2355 strhandle();
2356 break;
2357 default:
2358 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2359 memmove(&strescseq.buf[strescseq.len], c, len);
2360 strescseq.len += len;
2361 } else {
2362 /*
2363 * Here is a bug in terminals. If the user never sends
2364 * some code to stop the str or esc command, then st
2365 * will stop responding. But this is better than
2366 * silently failing with unknown characters. At least
2367 * then users will report back.
2368 *
2369 * In the case users ever get fixed, here is the code:
2370 */
2371 /*
2372 * term.esc = 0;
2373 * strhandle();
2374 */
2375 }
2376 }
2377 return;
2378 }
2379
2380 /*
2381 * Actions of control codes must be performed as soon they arrive
2382 * because they can be embedded inside a control sequence, and
2383 * they must not cause conflicts with sequences.
2384 */
2385 if(control) {
2386 switch(ascii) {
2387 case '\t': /* HT */
2388 tputtab(1);
2389 return;
2390 case '\b': /* BS */
2391 tmoveto(term.c.x-1, term.c.y);
2392 return;
2393 case '\r': /* CR */
2394 tmoveto(0, term.c.y);
2395 return;
2396 case '\f': /* LF */
2397 case '\v': /* VT */
2398 case '\n': /* LF */
2399 /* go to first col if the mode is set */
2400 tnewline(IS_SET(MODE_CRLF));
2401 return;
2402 case '\a': /* BEL */
2403 if(!(xw.state & WIN_FOCUSED))
2404 xseturgency(1);
2405 if (bellvolume)
2406 XBell(xw.dpy, bellvolume);
2407 return;
2408 case '\033': /* ESC */
2409 csireset();
2410 term.esc = ESC_START;
2411 return;
2412 case '\016': /* SO */
2413 term.charset = 0;
2414 tselcs();
2415 return;
2416 case '\017': /* SI */
2417 term.charset = 1;
2418 tselcs();
2419 return;
2420 case '\032': /* SUB */
2421 case '\030': /* CAN */
2422 csireset();
2423 return;
2424 case '\005': /* ENQ (IGNORED) */
2425 case '\000': /* NUL (IGNORED) */
2426 case '\021': /* XON (IGNORED) */
2427 case '\023': /* XOFF (IGNORED) */
2428 case 0177: /* DEL (IGNORED) */
2429 return;
2430 }
2431 } else if(term.esc & ESC_START) {
2432 if(term.esc & ESC_CSI) {
2433 csiescseq.buf[csiescseq.len++] = ascii;
2434 if(BETWEEN(ascii, 0x40, 0x7E)
2435 || csiescseq.len >= \
2436 sizeof(csiescseq.buf)-1) {
2437 term.esc = 0;
2438 csiparse();
2439 csihandle();
2440 }
2441 } else if(term.esc & ESC_STR_END) {
2442 term.esc = 0;
2443 if(ascii == '\\')
2444 strhandle();
2445 } else if(term.esc & ESC_ALTCHARSET) {
2446 tdeftran(ascii);
2447 tselcs();
2448 term.esc = 0;
2449 } else if(term.esc & ESC_TEST) {
2450 if(ascii == '8') { /* DEC screen alignment test. */
2451 char E[UTF_SIZ] = "E";
2452 int x, y;
2453
2454 for(x = 0; x < term.col; ++x) {
2455 for(y = 0; y < term.row; ++y)
2456 tsetchar(E, &term.c.attr, x, y);
2457 }
2458 }
2459 term.esc = 0;
2460 } else {
2461 switch(ascii) {
2462 case '[':
2463 term.esc |= ESC_CSI;
2464 break;
2465 case '#':
2466 term.esc |= ESC_TEST;
2467 break;
2468 case 'P': /* DCS -- Device Control String */
2469 case '_': /* APC -- Application Program Command */
2470 case '^': /* PM -- Privacy Message */
2471 case ']': /* OSC -- Operating System Command */
2472 case 'k': /* old title set compatibility */
2473 strreset();
2474 strescseq.type = ascii;
2475 term.esc |= ESC_STR;
2476 break;
2477 case '(': /* set primary charset G0 */
2478 case ')': /* set secondary charset G1 */
2479 case '*': /* set tertiary charset G2 */
2480 case '+': /* set quaternary charset G3 */
2481 term.icharset = ascii - '(';
2482 term.esc |= ESC_ALTCHARSET;
2483 break;
2484 case 'D': /* IND -- Linefeed */
2485 if(term.c.y == term.bot) {
2486 tscrollup(term.top, 1);
2487 } else {
2488 tmoveto(term.c.x, term.c.y+1);
2489 }
2490 term.esc = 0;
2491 break;
2492 case 'E': /* NEL -- Next line */
2493 tnewline(1); /* always go to first col */
2494 term.esc = 0;
2495 break;
2496 case 'H': /* HTS -- Horizontal tab stop */
2497 term.tabs[term.c.x] = 1;
2498 term.esc = 0;
2499 break;
2500 case 'M': /* RI -- Reverse index */
2501 if(term.c.y == term.top) {
2502 tscrolldown(term.top, 1);
2503 } else {
2504 tmoveto(term.c.x, term.c.y-1);
2505 }
2506 term.esc = 0;
2507 break;
2508 case 'Z': /* DECID -- Identify Terminal */
2509 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2510 term.esc = 0;
2511 break;
2512 case 'c': /* RIS -- Reset to inital state */
2513 treset();
2514 term.esc = 0;
2515 xresettitle();
2516 xloadcols();
2517 break;
2518 case '=': /* DECPAM -- Application keypad */
2519 term.mode |= MODE_APPKEYPAD;
2520 term.esc = 0;
2521 break;
2522 case '>': /* DECPNM -- Normal keypad */
2523 term.mode &= ~MODE_APPKEYPAD;
2524 term.esc = 0;
2525 break;
2526 case '7': /* DECSC -- Save Cursor */
2527 tcursor(CURSOR_SAVE);
2528 term.esc = 0;
2529 break;
2530 case '8': /* DECRC -- Restore Cursor */
2531 tcursor(CURSOR_LOAD);
2532 term.esc = 0;
2533 break;
2534 case '\\': /* ST -- Stop */
2535 term.esc = 0;
2536 break;
2537 default:
2538 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2539 (uchar) ascii, isprint(ascii)? ascii:'.');
2540 term.esc = 0;
2541 }
2542 }
2543 /*
2544 * All characters which form part of a sequence are not
2545 * printed
2546 */
2547 return;
2548 }
2549 /*
2550 * Display control codes only if we are in graphic mode
2551 */
2552 if(control && !(term.c.attr.mode & ATTR_GFX))
2553 return;
2554 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2555 selclear(NULL);
2556 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2557 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2558 tnewline(1);
2559 }
2560
2561 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2562 memmove(&term.line[term.c.y][term.c.x+1],
2563 &term.line[term.c.y][term.c.x],
2564 (term.col - term.c.x - 1) * sizeof(Glyph));
2565 }
2566
2567 if(term.c.x+width > term.col)
2568 tnewline(1);
2569
2570 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2571
2572 if(width == 2) {
2573 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2574 if(term.c.x+1 < term.col) {
2575 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2576 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2577 }
2578 }
2579 if(term.c.x+width < term.col) {
2580 tmoveto(term.c.x+width, term.c.y);
2581 } else {
2582 term.c.state |= CURSOR_WRAPNEXT;
2583 }
2584 }
2585
2586 int
2587 tresize(int col, int row) {
2588 int i;
2589 int minrow = MIN(row, term.row);
2590 int mincol = MIN(col, term.col);
2591 int slide = term.c.y - row + 1;
2592 bool *bp;
2593 Line *orig;
2594
2595 if(col < 1 || row < 1)
2596 return 0;
2597
2598 /* free unneeded rows */
2599 i = 0;
2600 if(slide > 0) {
2601 /*
2602 * slide screen to keep cursor where we expect it -
2603 * tscrollup would work here, but we can optimize to
2604 * memmove because we're freeing the earlier lines
2605 */
2606 for(/* i = 0 */; i < slide; i++) {
2607 free(term.line[i]);
2608 free(term.alt[i]);
2609 }
2610 memmove(term.line, term.line + slide, row * sizeof(Line));
2611 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2612 }
2613 for(i += row; i < term.row; i++) {
2614 free(term.line[i]);
2615 free(term.alt[i]);
2616 }
2617
2618 /* resize to new height */
2619 term.line = xrealloc(term.line, row * sizeof(Line));
2620 term.alt = xrealloc(term.alt, row * sizeof(Line));
2621 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2622 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2623
2624 /* resize each row to new width, zero-pad if needed */
2625 for(i = 0; i < minrow; i++) {
2626 term.dirty[i] = 1;
2627 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2628 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2629 }
2630
2631 /* allocate any new rows */
2632 for(/* i == minrow */; i < row; i++) {
2633 term.dirty[i] = 1;
2634 term.line[i] = xmalloc(col * sizeof(Glyph));
2635 term.alt[i] = xmalloc(col * sizeof(Glyph));
2636 }
2637 if(col > term.col) {
2638 bp = term.tabs + term.col;
2639
2640 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2641 while(--bp > term.tabs && !*bp)
2642 /* nothing */ ;
2643 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2644 *bp = 1;
2645 }
2646 /* update terminal size */
2647 term.col = col;
2648 term.row = row;
2649 /* reset scrolling region */
2650 tsetscroll(0, row-1);
2651 /* make use of the LIMIT in tmoveto */
2652 tmoveto(term.c.x, term.c.y);
2653 /* Clearing both screens */
2654 orig = term.line;
2655 do {
2656 if(mincol < col && 0 < minrow) {
2657 tclearregion(mincol, 0, col - 1, minrow - 1);
2658 }
2659 if(0 < col && minrow < row) {
2660 tclearregion(0, minrow, col - 1, row - 1);
2661 }
2662 tswapscreen();
2663 } while(orig != term.line);
2664
2665 return (slide > 0);
2666 }
2667
2668 void
2669 xresize(int col, int row) {
2670 xw.tw = MAX(1, col * xw.cw);
2671 xw.th = MAX(1, row * xw.ch);
2672
2673 XFreePixmap(xw.dpy, xw.buf);
2674 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2675 DefaultDepth(xw.dpy, xw.scr));
2676 XftDrawChange(xw.draw, xw.buf);
2677 xclear(0, 0, xw.w, xw.h);
2678 }
2679
2680 static inline ushort
2681 sixd_to_16bit(int x) {
2682 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2683 }
2684
2685 void
2686 xloadcols(void) {
2687 int i, r, g, b;
2688 XRenderColor color = { .alpha = 0xffff };
2689 static bool loaded;
2690 Colour *cp;
2691
2692 if(loaded) {
2693 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2694 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2695 }
2696
2697 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2698 for(i = 0; i < LEN(colorname); i++) {
2699 if(!colorname[i])
2700 continue;
2701 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2702 die("Could not allocate color '%s'\n", colorname[i]);
2703 }
2704 }
2705
2706 /* load colors [16-255] ; same colors as xterm */
2707 for(i = 16, r = 0; r < 6; r++) {
2708 for(g = 0; g < 6; g++) {
2709 for(b = 0; b < 6; b++) {
2710 color.red = sixd_to_16bit(r);
2711 color.green = sixd_to_16bit(g);
2712 color.blue = sixd_to_16bit(b);
2713 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2714 die("Could not allocate color %d\n", i);
2715 }
2716 i++;
2717 }
2718 }
2719 }
2720
2721 for(r = 0; r < 24; r++, i++) {
2722 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2723 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2724 &dc.col[i])) {
2725 die("Could not allocate color %d\n", i);
2726 }
2727 }
2728 loaded = true;
2729 }
2730
2731 int
2732 xsetcolorname(int x, const char *name) {
2733 XRenderColor color = { .alpha = 0xffff };
2734 Colour colour;
2735 if (x < 0 || x > LEN(colorname))
2736 return -1;
2737 if(!name) {
2738 if(16 <= x && x < 16 + 216) {
2739 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2740 color.red = sixd_to_16bit(r);
2741 color.green = sixd_to_16bit(g);
2742 color.blue = sixd_to_16bit(b);
2743 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2744 return 0; /* something went wrong */
2745 dc.col[x] = colour;
2746 return 1;
2747 } else if (16 + 216 <= x && x < 256) {
2748 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2749 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2750 return 0; /* something went wrong */
2751 dc.col[x] = colour;
2752 return 1;
2753 } else {
2754 name = colorname[x];
2755 }
2756 }
2757 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2758 return 0;
2759 dc.col[x] = colour;
2760 return 1;
2761 }
2762
2763 void
2764 xtermclear(int col1, int row1, int col2, int row2) {
2765 XftDrawRect(xw.draw,
2766 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2767 borderpx + col1 * xw.cw,
2768 borderpx + row1 * xw.ch,
2769 (col2-col1+1) * xw.cw,
2770 (row2-row1+1) * xw.ch);
2771 }
2772
2773 /*
2774 * Absolute coordinates.
2775 */
2776 void
2777 xclear(int x1, int y1, int x2, int y2) {
2778 XftDrawRect(xw.draw,
2779 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2780 x1, y1, x2-x1, y2-y1);
2781 }
2782
2783 void
2784 xhints(void) {
2785 XClassHint class = {opt_class ? opt_class : termname, termname};
2786 XWMHints wm = {.flags = InputHint, .input = 1};
2787 XSizeHints *sizeh = NULL;
2788
2789 sizeh = XAllocSizeHints();
2790 if(xw.isfixed == False) {
2791 sizeh->flags = PSize | PResizeInc | PBaseSize;
2792 sizeh->height = xw.h;
2793 sizeh->width = xw.w;
2794 sizeh->height_inc = xw.ch;
2795 sizeh->width_inc = xw.cw;
2796 sizeh->base_height = 2 * borderpx;
2797 sizeh->base_width = 2 * borderpx;
2798 } else {
2799 sizeh->flags = PMaxSize | PMinSize;
2800 sizeh->min_width = sizeh->max_width = xw.fw;
2801 sizeh->min_height = sizeh->max_height = xw.fh;
2802 }
2803
2804 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2805 XFree(sizeh);
2806 }
2807
2808 int
2809 xloadfont(Font *f, FcPattern *pattern) {
2810 FcPattern *match;
2811 FcResult result;
2812
2813 match = FcFontMatch(NULL, pattern, &result);
2814 if(!match)
2815 return 1;
2816
2817 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2818 FcPatternDestroy(match);
2819 return 1;
2820 }
2821
2822 f->set = NULL;
2823 f->pattern = FcPatternDuplicate(pattern);
2824
2825 f->ascent = f->match->ascent;
2826 f->descent = f->match->descent;
2827 f->lbearing = 0;
2828 f->rbearing = f->match->max_advance_width;
2829
2830 f->height = f->ascent + f->descent;
2831 f->width = f->lbearing + f->rbearing;
2832
2833 return 0;
2834 }
2835
2836 void
2837 xloadfonts(char *fontstr, double fontsize) {
2838 FcPattern *pattern;
2839 FcResult r_sz, r_psz;
2840 double fontval;
2841
2842 if(fontstr[0] == '-') {
2843 pattern = XftXlfdParse(fontstr, False, False);
2844 } else {
2845 pattern = FcNameParse((FcChar8 *)fontstr);
2846 }
2847
2848 if(!pattern)
2849 die("st: can't open font %s\n", fontstr);
2850
2851 if(fontsize > 0) {
2852 FcPatternDel(pattern, FC_PIXEL_SIZE);
2853 FcPatternDel(pattern, FC_SIZE);
2854 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2855 usedfontsize = fontsize;
2856 } else {
2857 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2858 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2859 if(r_psz == FcResultMatch) {
2860 usedfontsize = fontval;
2861 } else if(r_sz == FcResultMatch) {
2862 usedfontsize = -1;
2863 } else {
2864 /*
2865 * Default font size is 12, if none given. This is to
2866 * have a known usedfontsize value.
2867 */
2868 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2869 usedfontsize = 12;
2870 }
2871 }
2872
2873 FcConfigSubstitute(0, pattern, FcMatchPattern);
2874 FcDefaultSubstitute(pattern);
2875
2876 if(xloadfont(&dc.font, pattern))
2877 die("st: can't open font %s\n", fontstr);
2878
2879 if(usedfontsize < 0) {
2880 FcPatternGetDouble(dc.font.match->pattern,
2881 FC_PIXEL_SIZE, 0, &fontval);
2882 usedfontsize = fontval;
2883 }
2884
2885 /* Setting character width and height. */
2886 xw.cw = CEIL(dc.font.width * cwscale);
2887 xw.ch = CEIL(dc.font.height * chscale);
2888
2889 FcPatternDel(pattern, FC_SLANT);
2890 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2891 if(xloadfont(&dc.ifont, pattern))
2892 die("st: can't open font %s\n", fontstr);
2893
2894 FcPatternDel(pattern, FC_WEIGHT);
2895 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2896 if(xloadfont(&dc.ibfont, pattern))
2897 die("st: can't open font %s\n", fontstr);
2898
2899 FcPatternDel(pattern, FC_SLANT);
2900 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2901 if(xloadfont(&dc.bfont, pattern))
2902 die("st: can't open font %s\n", fontstr);
2903
2904 FcPatternDestroy(pattern);
2905 }
2906
2907 int
2908 xloadfontset(Font *f) {
2909 FcResult result;
2910
2911 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2912 return 1;
2913 return 0;
2914 }
2915
2916 void
2917 xunloadfont(Font *f) {
2918 XftFontClose(xw.dpy, f->match);
2919 FcPatternDestroy(f->pattern);
2920 if(f->set)
2921 FcFontSetDestroy(f->set);
2922 }
2923
2924 void
2925 xunloadfonts(void) {
2926 int i;
2927
2928 /* Free the loaded fonts in the font cache. */
2929 for(i = 0; i < frclen; i++) {
2930 XftFontClose(xw.dpy, frc[i].font);
2931 }
2932 frclen = 0;
2933
2934 xunloadfont(&dc.font);
2935 xunloadfont(&dc.bfont);
2936 xunloadfont(&dc.ifont);
2937 xunloadfont(&dc.ibfont);
2938 }
2939
2940 void
2941 xzoom(const Arg *arg) {
2942 xunloadfonts();
2943 xloadfonts(usedfont, usedfontsize + arg->i);
2944 cresize(0, 0);
2945 redraw(0);
2946 }
2947
2948 void
2949 xinit(void) {
2950 XGCValues gcvalues;
2951 Cursor cursor;
2952 Window parent;
2953 int sw, sh;
2954 pid_t thispid = getpid();
2955
2956 if(!(xw.dpy = XOpenDisplay(NULL)))
2957 die("Can't open display\n");
2958 xw.scr = XDefaultScreen(xw.dpy);
2959 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2960
2961 /* font */
2962 if(!FcInit())
2963 die("Could not init fontconfig.\n");
2964
2965 usedfont = (opt_font == NULL)? font : opt_font;
2966 xloadfonts(usedfont, 0);
2967
2968 /* colors */
2969 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2970 xloadcols();
2971
2972 /* adjust fixed window geometry */
2973 if(xw.isfixed) {
2974 sw = DisplayWidth(xw.dpy, xw.scr);
2975 sh = DisplayHeight(xw.dpy, xw.scr);
2976 if(xw.fx < 0)
2977 xw.fx = sw + xw.fx - xw.fw - 1;
2978 if(xw.fy < 0)
2979 xw.fy = sh + xw.fy - xw.fh - 1;
2980
2981 xw.h = xw.fh;
2982 xw.w = xw.fw;
2983 } else {
2984 /* window - default size */
2985 xw.h = 2 * borderpx + term.row * xw.ch;
2986 xw.w = 2 * borderpx + term.col * xw.cw;
2987 xw.fx = 0;
2988 xw.fy = 0;
2989 }
2990
2991 /* Events */
2992 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
2993 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
2994 xw.attrs.bit_gravity = NorthWestGravity;
2995 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
2996 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2997 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2998 xw.attrs.colormap = xw.cmap;
2999
3000 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3001 XRootWindow(xw.dpy, xw.scr);
3002 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
3003 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3004 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3005 | CWEventMask | CWColormap, &xw.attrs);
3006
3007 memset(&gcvalues, 0, sizeof(gcvalues));
3008 gcvalues.graphics_exposures = False;
3009 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3010 &gcvalues);
3011 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3012 DefaultDepth(xw.dpy, xw.scr));
3013 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3014 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3015
3016 /* Xft rendering context */
3017 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3018
3019 /* input methods */
3020 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3021 XSetLocaleModifiers("@im=local");
3022 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3023 XSetLocaleModifiers("@im=");
3024 if((xw.xim = XOpenIM(xw.dpy,
3025 NULL, NULL, NULL)) == NULL) {
3026 die("XOpenIM failed. Could not open input"
3027 " device.\n");
3028 }
3029 }
3030 }
3031 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3032 | XIMStatusNothing, XNClientWindow, xw.win,
3033 XNFocusWindow, xw.win, NULL);
3034 if(xw.xic == NULL)
3035 die("XCreateIC failed. Could not obtain input method.\n");
3036
3037 /* white cursor, black outline */
3038 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3039 XDefineCursor(xw.dpy, xw.win, cursor);
3040 XRecolorCursor(xw.dpy, cursor,
3041 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3042 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3043
3044 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3045 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3046 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3047 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3048
3049 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3050 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3051 PropModeReplace, (unsigned char *)&thispid, 1);
3052
3053 xresettitle();
3054 XMapWindow(xw.dpy, xw.win);
3055 xhints();
3056 XSync(xw.dpy, 0);
3057 }
3058
3059 void
3060 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3061 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3062 width = charlen * xw.cw, xp, i;
3063 int frcflags;
3064 int u8fl, u8fblen, u8cblen, doesexist;
3065 char *u8c, *u8fs;
3066 long u8char;
3067 Font *font = &dc.font;
3068 FcResult fcres;
3069 FcPattern *fcpattern, *fontpattern;
3070 FcFontSet *fcsets[] = { NULL };
3071 FcCharSet *fccharset;
3072 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3073 XRenderColor colfg, colbg;
3074 Rectangle r;
3075 int oneatatime;
3076
3077 frcflags = FRC_NORMAL;
3078
3079 if(base.mode & ATTR_ITALIC) {
3080 if(base.fg == defaultfg)
3081 base.fg = defaultitalic;
3082 font = &dc.ifont;
3083 frcflags = FRC_ITALIC;
3084 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3085 if(base.fg == defaultfg)
3086 base.fg = defaultitalic;
3087 font = &dc.ibfont;
3088 frcflags = FRC_ITALICBOLD;
3089 } else if(base.mode & ATTR_UNDERLINE) {
3090 if(base.fg == defaultfg)
3091 base.fg = defaultunderline;
3092 }
3093 if(IS_TRUECOL(base.fg)) {
3094 colfg.alpha = 0xffff;
3095 colfg.red = TRUERED(base.fg);
3096 colfg.green = TRUEGREEN(base.fg);
3097 colfg.blue = TRUEBLUE(base.fg);
3098 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3099 fg = &truefg;
3100 } else {
3101 fg = &dc.col[base.fg];
3102 }
3103
3104 if(IS_TRUECOL(base.bg)) {
3105 colbg.alpha = 0xffff;
3106 colbg.green = TRUEGREEN(base.bg);
3107 colbg.red = TRUERED(base.bg);
3108 colbg.blue = TRUEBLUE(base.bg);
3109 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3110 bg = &truebg;
3111 } else {
3112 bg = &dc.col[base.bg];
3113 }
3114
3115
3116
3117 if(base.mode & ATTR_BOLD) {
3118 if(BETWEEN(base.fg, 0, 7)) {
3119 /* basic system colors */
3120 fg = &dc.col[base.fg + 8];
3121 } else if(BETWEEN(base.fg, 16, 195)) {
3122 /* 256 colors */
3123 fg = &dc.col[base.fg + 36];
3124 } else if(BETWEEN(base.fg, 232, 251)) {
3125 /* greyscale */
3126 fg = &dc.col[base.fg + 4];
3127 }
3128 /*
3129 * Those ranges will not be brightened:
3130 * 8 - 15 – bright system colors
3131 * 196 - 231 – highest 256 color cube
3132 * 252 - 255 – brightest colors in greyscale
3133 */
3134 font = &dc.bfont;
3135 frcflags = FRC_BOLD;
3136 }
3137
3138 if(IS_SET(MODE_REVERSE)) {
3139 if(fg == &dc.col[defaultfg]) {
3140 fg = &dc.col[defaultbg];
3141 } else {
3142 colfg.red = ~fg->color.red;
3143 colfg.green = ~fg->color.green;
3144 colfg.blue = ~fg->color.blue;
3145 colfg.alpha = fg->color.alpha;
3146 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3147 fg = &revfg;
3148 }
3149
3150 if(bg == &dc.col[defaultbg]) {
3151 bg = &dc.col[defaultfg];
3152 } else {
3153 colbg.red = ~bg->color.red;
3154 colbg.green = ~bg->color.green;
3155 colbg.blue = ~bg->color.blue;
3156 colbg.alpha = bg->color.alpha;
3157 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
3158 bg = &revbg;
3159 }
3160 }
3161
3162 if(base.mode & ATTR_REVERSE) {
3163 temp = fg;
3164 fg = bg;
3165 bg = temp;
3166 }
3167
3168 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3169 fg = bg;
3170
3171 /* Intelligent cleaning up of the borders. */
3172 if(x == 0) {
3173 xclear(0, (y == 0)? 0 : winy, borderpx,
3174 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3175 }
3176 if(x + charlen >= term.col) {
3177 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3178 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3179 }
3180 if(y == 0)
3181 xclear(winx, 0, winx + width, borderpx);
3182 if(y == term.row-1)
3183 xclear(winx, winy + xw.ch, winx + width, xw.h);
3184
3185 /* Clean up the region we want to draw to. */
3186 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3187
3188 /* Set the clip region because Xft is sometimes dirty. */
3189 r.x = 0;
3190 r.y = 0;
3191 r.height = xw.ch;
3192 r.width = width;
3193 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3194
3195 for(xp = winx; bytelen > 0;) {
3196 /*
3197 * Search for the range in the to be printed string of glyphs
3198 * that are in the main font. Then print that range. If
3199 * some glyph is found that is not in the font, do the
3200 * fallback dance.
3201 */
3202 u8fs = s;
3203 u8fblen = 0;
3204 u8fl = 0;
3205 oneatatime = font->width != xw.cw;
3206 for(;;) {
3207 u8c = s;
3208 u8cblen = utf8decode(s, &u8char);
3209 s += u8cblen;
3210 bytelen -= u8cblen;
3211
3212 doesexist = XftCharExists(xw.dpy, font->match, u8char);
3213 if(oneatatime || !doesexist || bytelen <= 0) {
3214 if(oneatatime || bytelen <= 0) {
3215 if(doesexist) {
3216 u8fl++;
3217 u8fblen += u8cblen;
3218 }
3219 }
3220
3221 if(u8fl > 0) {
3222 XftDrawStringUtf8(xw.draw, fg,
3223 font->match, xp,
3224 winy + font->ascent,
3225 (FcChar8 *)u8fs,
3226 u8fblen);
3227 xp += xw.cw * u8fl;
3228
3229 }
3230 break;
3231 }
3232
3233 u8fl++;
3234 u8fblen += u8cblen;
3235 }
3236 if(doesexist) {
3237 if (oneatatime)
3238 continue;
3239 break;
3240 }
3241
3242 /* Search the font cache. */
3243 for(i = 0; i < frclen; i++) {
3244 if(XftCharExists(xw.dpy, frc[i].font, u8char)
3245 && frc[i].flags == frcflags) {
3246 break;
3247 }
3248 }
3249
3250 /* Nothing was found. */
3251 if(i >= frclen) {
3252 if(!font->set)
3253 xloadfontset(font);
3254 fcsets[0] = font->set;
3255
3256 /*
3257 * Nothing was found in the cache. Now use
3258 * some dozen of Fontconfig calls to get the
3259 * font for one single character.
3260 */
3261 fcpattern = FcPatternDuplicate(font->pattern);
3262 fccharset = FcCharSetCreate();
3263
3264 FcCharSetAddChar(fccharset, u8char);
3265 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3266 fccharset);
3267 FcPatternAddBool(fcpattern, FC_SCALABLE,
3268 FcTrue);
3269
3270 FcConfigSubstitute(0, fcpattern,
3271 FcMatchPattern);
3272 FcDefaultSubstitute(fcpattern);
3273
3274 fontpattern = FcFontSetMatch(0, fcsets,
3275 FcTrue, fcpattern, &fcres);
3276
3277 /*
3278 * Overwrite or create the new cache entry.
3279 */
3280 if(frclen >= LEN(frc)) {
3281 frclen = LEN(frc) - 1;
3282 XftFontClose(xw.dpy, frc[frclen].font);
3283 }
3284
3285 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3286 fontpattern);
3287 frc[frclen].flags = frcflags;
3288
3289 i = frclen;
3290 frclen++;
3291
3292 FcPatternDestroy(fcpattern);
3293 FcCharSetDestroy(fccharset);
3294 }
3295
3296 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3297 xp, winy + frc[i].font->ascent,
3298 (FcChar8 *)u8c, u8cblen);
3299
3300 xp += xw.cw * wcwidth(u8char);
3301 }
3302
3303 /*
3304 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3305 winy + font->ascent, (FcChar8 *)s, bytelen);
3306 */
3307
3308 if(base.mode & ATTR_UNDERLINE) {
3309 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3310 width, 1);
3311 }
3312
3313 /* Reset clip to none. */
3314 XftDrawSetClip(xw.draw, 0);
3315 }
3316
3317 void
3318 xdrawcursor(void) {
3319 static int oldx = 0, oldy = 0;
3320 int sl, width, curx;
3321 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3322
3323 LIMIT(oldx, 0, term.col-1);
3324 LIMIT(oldy, 0, term.row-1);
3325
3326 curx = term.c.x;
3327
3328 /* adjust position if in dummy */
3329 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3330 oldx--;
3331 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3332 curx--;
3333
3334 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3335
3336 /* remove the old cursor */
3337 sl = utf8size(term.line[oldy][oldx].c);
3338 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3339 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3340 oldy, width, sl);
3341
3342 /* draw the new one */
3343 if(!(IS_SET(MODE_HIDE))) {
3344 if(xw.state & WIN_FOCUSED) {
3345 if(IS_SET(MODE_REVERSE)) {
3346 g.mode |= ATTR_REVERSE;
3347 g.fg = defaultcs;
3348 g.bg = defaultfg;
3349 }
3350
3351 sl = utf8size(g.c);
3352 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3353 ? 2 : 1;
3354 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3355 } else {
3356 XftDrawRect(xw.draw, &dc.col[defaultcs],
3357 borderpx + curx * xw.cw,
3358 borderpx + term.c.y * xw.ch,
3359 xw.cw - 1, 1);
3360 XftDrawRect(xw.draw, &dc.col[defaultcs],
3361 borderpx + curx * xw.cw,
3362 borderpx + term.c.y * xw.ch,
3363 1, xw.ch - 1);
3364 XftDrawRect(xw.draw, &dc.col[defaultcs],
3365 borderpx + (curx + 1) * xw.cw - 1,
3366 borderpx + term.c.y * xw.ch,
3367 1, xw.ch - 1);
3368 XftDrawRect(xw.draw, &dc.col[defaultcs],
3369 borderpx + curx * xw.cw,
3370 borderpx + (term.c.y + 1) * xw.ch - 1,
3371 xw.cw, 1);
3372 }
3373 oldx = curx, oldy = term.c.y;
3374 }
3375 }
3376
3377
3378 void
3379 xsettitle(char *p) {
3380 XTextProperty prop;
3381
3382 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3383 &prop);
3384 XSetWMName(xw.dpy, xw.win, &prop);
3385 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3386 XFree(prop.value);
3387 }
3388
3389 void
3390 xresettitle(void) {
3391 xsettitle(opt_title ? opt_title : "st");
3392 }
3393
3394 void
3395 redraw(int timeout) {
3396 struct timespec tv = {0, timeout * 1000};
3397
3398 tfulldirt();
3399 draw();
3400
3401 if(timeout > 0) {
3402 nanosleep(&tv, NULL);
3403 XSync(xw.dpy, False); /* necessary for a good tput flash */
3404 }
3405 }
3406
3407 void
3408 draw(void) {
3409 drawregion(0, 0, term.col, term.row);
3410 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3411 xw.h, 0, 0);
3412 XSetForeground(xw.dpy, dc.gc,
3413 dc.col[IS_SET(MODE_REVERSE)?
3414 defaultfg : defaultbg].pixel);
3415 }
3416
3417 void
3418 drawregion(int x1, int y1, int x2, int y2) {
3419 int ic, ib, x, y, ox, sl;
3420 Glyph base, new;
3421 char buf[DRAW_BUF_SIZ];
3422 bool ena_sel = sel.ob.x != -1;
3423 long u8char;
3424
3425 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3426 ena_sel = 0;
3427
3428 if(!(xw.state & WIN_VISIBLE))
3429 return;
3430
3431 for(y = y1; y < y2; y++) {
3432 if(!term.dirty[y])
3433 continue;
3434
3435 xtermclear(0, y, term.col, y);
3436 term.dirty[y] = 0;
3437 base = term.line[y][0];
3438 ic = ib = ox = 0;
3439 for(x = x1; x < x2; x++) {
3440 new = term.line[y][x];
3441 if(new.mode == ATTR_WDUMMY)
3442 continue;
3443 if(ena_sel && selected(x, y))
3444 new.mode ^= ATTR_REVERSE;
3445 if(ib > 0 && (ATTRCMP(base, new)
3446 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3447 xdraws(buf, base, ox, y, ic, ib);
3448 ic = ib = 0;
3449 }
3450 if(ib == 0) {
3451 ox = x;
3452 base = new;
3453 }
3454
3455 sl = utf8decode(new.c, &u8char);
3456 memcpy(buf+ib, new.c, sl);
3457 ib += sl;
3458 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3459 }
3460 if(ib > 0)
3461 xdraws(buf, base, ox, y, ic, ib);
3462 }
3463 xdrawcursor();
3464 }
3465
3466 void
3467 expose(XEvent *ev) {
3468 XExposeEvent *e = &ev->xexpose;
3469
3470 if(xw.state & WIN_REDRAW) {
3471 if(!e->count)
3472 xw.state &= ~WIN_REDRAW;
3473 }
3474 redraw(0);
3475 }
3476
3477 void
3478 visibility(XEvent *ev) {
3479 XVisibilityEvent *e = &ev->xvisibility;
3480
3481 if(e->state == VisibilityFullyObscured) {
3482 xw.state &= ~WIN_VISIBLE;
3483 } else if(!(xw.state & WIN_VISIBLE)) {
3484 /* need a full redraw for next Expose, not just a buf copy */
3485 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3486 }
3487 }
3488
3489 void
3490 unmap(XEvent *ev) {
3491 xw.state &= ~WIN_VISIBLE;
3492 }
3493
3494 void
3495 xsetpointermotion(int set) {
3496 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3497 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3498 }
3499
3500 void
3501 xseturgency(int add) {
3502 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3503
3504 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3505 XSetWMHints(xw.dpy, xw.win, h);
3506 XFree(h);
3507 }
3508
3509 void
3510 focus(XEvent *ev) {
3511 XFocusChangeEvent *e = &ev->xfocus;
3512
3513 if(e->mode == NotifyGrab)
3514 return;
3515
3516 if(ev->type == FocusIn) {
3517 XSetICFocus(xw.xic);
3518 xw.state |= WIN_FOCUSED;
3519 xseturgency(0);
3520 if(IS_SET(MODE_FOCUS))
3521 ttywrite("\033[I", 3);
3522 } else {
3523 XUnsetICFocus(xw.xic);
3524 xw.state &= ~WIN_FOCUSED;
3525 if(IS_SET(MODE_FOCUS))
3526 ttywrite("\033[O", 3);
3527 }
3528 }
3529
3530 static inline bool
3531 match(uint mask, uint state) {
3532 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3533 }
3534
3535 void
3536 numlock(const Arg *dummy) {
3537 term.numlock ^= 1;
3538 }
3539
3540 char*
3541 kmap(KeySym k, uint state) {
3542 Key *kp;
3543 int i;
3544
3545 /* Check for mapped keys out of X11 function keys. */
3546 for(i = 0; i < LEN(mappedkeys); i++) {
3547 if(mappedkeys[i] == k)
3548 break;
3549 }
3550 if(i == LEN(mappedkeys)) {
3551 if((k & 0xFFFF) < 0xFD00)
3552 return NULL;
3553 }
3554
3555 for(kp = key; kp < key + LEN(key); kp++) {
3556 if(kp->k != k)
3557 continue;
3558
3559 if(!match(kp->mask, state))
3560 continue;
3561
3562 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3563 continue;
3564 if(term.numlock && kp->appkey == 2)
3565 continue;
3566
3567 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3568 continue;
3569
3570 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3571 continue;
3572
3573 return kp->s;
3574 }
3575
3576 return NULL;
3577 }
3578
3579 void
3580 kpress(XEvent *ev) {
3581 XKeyEvent *e = &ev->xkey;
3582 KeySym ksym;
3583 char buf[32], *customkey;
3584 int len;
3585 long c;
3586 Status status;
3587 Shortcut *bp;
3588
3589 if(IS_SET(MODE_KBDLOCK))
3590 return;
3591
3592 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3593 /* 1. shortcuts */
3594 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3595 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3596 bp->func(&(bp->arg));
3597 return;
3598 }
3599 }
3600
3601 /* 2. custom keys from config.h */
3602 if((customkey = kmap(ksym, e->state))) {
3603 ttysend(customkey, strlen(customkey));
3604 return;
3605 }
3606
3607 /* 3. composed string from input method */
3608 if(len == 0)
3609 return;
3610 if(len == 1 && e->state & Mod1Mask) {
3611 if(IS_SET(MODE_8BIT)) {
3612 if(*buf < 0177) {
3613 c = *buf | 0x80;
3614 len = utf8encode(&c, buf);
3615 }
3616 } else {
3617 buf[1] = buf[0];
3618 buf[0] = '\033';
3619 len = 2;
3620 }
3621 }
3622 ttysend(buf, len);
3623 }
3624
3625
3626 void
3627 cmessage(XEvent *e) {
3628 /*
3629 * See xembed specs
3630 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3631 */
3632 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3633 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3634 xw.state |= WIN_FOCUSED;
3635 xseturgency(0);
3636 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3637 xw.state &= ~WIN_FOCUSED;
3638 }
3639 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3640 /* Send SIGHUP to shell */
3641 kill(pid, SIGHUP);
3642 exit(EXIT_SUCCESS);
3643 }
3644 }
3645
3646 void
3647 cresize(int width, int height) {
3648 int col, row;
3649
3650 if(width != 0)
3651 xw.w = width;
3652 if(height != 0)
3653 xw.h = height;
3654
3655 col = (xw.w - 2 * borderpx) / xw.cw;
3656 row = (xw.h - 2 * borderpx) / xw.ch;
3657
3658 tresize(col, row);
3659 xresize(col, row);
3660 ttyresize();
3661 }
3662
3663 void
3664 resize(XEvent *e) {
3665 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3666 return;
3667
3668 cresize(e->xconfigure.width, e->xconfigure.height);
3669 }
3670
3671 void
3672 run(void) {
3673 XEvent ev;
3674 int w = xw.w, h = xw.h;
3675 fd_set rfd;
3676 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3677 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3678
3679 /* Waiting for window mapping */
3680 while(1) {
3681 XNextEvent(xw.dpy, &ev);
3682 if(ev.type == ConfigureNotify) {
3683 w = ev.xconfigure.width;
3684 h = ev.xconfigure.height;
3685 } else if(ev.type == MapNotify) {
3686 break;
3687 }
3688 }
3689
3690 ttynew();
3691 if(!xw.isfixed)
3692 cresize(w, h);
3693 else
3694 cresize(xw.fw, xw.fh);
3695
3696 gettimeofday(&lastblink, NULL);
3697 gettimeofday(&last, NULL);
3698
3699 for(xev = actionfps;;) {
3700 long deltatime;
3701
3702 FD_ZERO(&rfd);
3703 FD_SET(cmdfd, &rfd);
3704 FD_SET(xfd, &rfd);
3705
3706 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3707 if(errno == EINTR)
3708 continue;
3709 die("select failed: %s\n", SERRNO);
3710 }
3711 if(FD_ISSET(cmdfd, &rfd)) {
3712 ttyread();
3713 if(blinktimeout) {
3714 blinkset = tattrset(ATTR_BLINK);
3715 if(!blinkset)
3716 MODBIT(term.mode, 0, MODE_BLINK);
3717 }
3718 }
3719
3720 if(FD_ISSET(xfd, &rfd))
3721 xev = actionfps;
3722
3723 gettimeofday(&now, NULL);
3724 drawtimeout.tv_sec = 0;
3725 drawtimeout.tv_usec = (1000/xfps) * 1000;
3726 tv = &drawtimeout;
3727
3728 dodraw = 0;
3729 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3730 tsetdirtattr(ATTR_BLINK);
3731 term.mode ^= MODE_BLINK;
3732 gettimeofday(&lastblink, NULL);
3733 dodraw = 1;
3734 }
3735 deltatime = TIMEDIFF(now, last);
3736 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3737 || deltatime < 0) {
3738 dodraw = 1;
3739 last = now;
3740 }
3741
3742 if(dodraw) {
3743 while(XPending(xw.dpy)) {
3744 XNextEvent(xw.dpy, &ev);
3745 if(XFilterEvent(&ev, None))
3746 continue;
3747 if(handler[ev.type])
3748 (handler[ev.type])(&ev);
3749 }
3750
3751 draw();
3752 XFlush(xw.dpy);
3753
3754 if(xev && !FD_ISSET(xfd, &rfd))
3755 xev--;
3756 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3757 if(blinkset) {
3758 if(TIMEDIFF(now, lastblink) \
3759 > blinktimeout) {
3760 drawtimeout.tv_usec = 1;
3761 } else {
3762 drawtimeout.tv_usec = (1000 * \
3763 (blinktimeout - \
3764 TIMEDIFF(now,
3765 lastblink)));
3766 }
3767 } else {
3768 tv = NULL;
3769 }
3770 }
3771 }
3772 }
3773 }
3774
3775 void
3776 usage(void) {
3777 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3778 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3779 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3780 }
3781
3782 int
3783 main(int argc, char *argv[]) {
3784 int bitm, xr, yr;
3785 uint wr, hr;
3786 char *titles;
3787
3788 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3789 xw.isfixed = False;
3790
3791 ARGBEGIN {
3792 case 'a':
3793 allowaltscreen = false;
3794 break;
3795 case 'c':
3796 opt_class = EARGF(usage());
3797 break;
3798 case 'e':
3799 /* eat all remaining arguments */
3800 if(argc > 1) {
3801 opt_cmd = &argv[1];
3802 if(argv[1] != NULL && opt_title == NULL) {
3803 titles = xstrdup(argv[1]);
3804 opt_title = basename(titles);
3805 }
3806 }
3807 goto run;
3808 case 'f':
3809 opt_font = EARGF(usage());
3810 break;
3811 case 'g':
3812 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3813 if(bitm & XValue)
3814 xw.fx = xr;
3815 if(bitm & YValue)
3816 xw.fy = yr;
3817 if(bitm & WidthValue)
3818 xw.fw = (int)wr;
3819 if(bitm & HeightValue)
3820 xw.fh = (int)hr;
3821 if(bitm & XNegative && xw.fx == 0)
3822 xw.fx = -1;
3823 if(bitm & YNegative && xw.fy == 0)
3824 xw.fy = -1;
3825
3826 if(xw.fh != 0 && xw.fw != 0)
3827 xw.isfixed = True;
3828 break;
3829 case 'o':
3830 opt_io = EARGF(usage());
3831 break;
3832 case 't':
3833 opt_title = EARGF(usage());
3834 break;
3835 case 'w':
3836 opt_embed = EARGF(usage());
3837 break;
3838 case 'v':
3839 default:
3840 usage();
3841 } ARGEND;
3842
3843 run:
3844 setlocale(LC_CTYPE, "");
3845 XSetLocaleModifiers("");
3846 tnew(80, 24);
3847 xinit();
3848 selinit();
3849 run();
3850
3851 return 0;
3852 }
3853