?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Add MC sequence
[st.git] / st.c
blob314bf3fe90025a0ed9969f7e3cc394447f8f317c
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_PRINT = 1048576,
138 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
139 |MODE_MOUSEMANY,
140 };
141
142 enum charset {
143 CS_GRAPHIC0,
144 CS_GRAPHIC1,
145 CS_UK,
146 CS_USA,
147 CS_MULTI,
148 CS_GER,
149 CS_FIN
150 };
151
152 enum escape_state {
153 ESC_START = 1,
154 ESC_CSI = 2,
155 ESC_STR = 4, /* DSC, OSC, PM, APC */
156 ESC_ALTCHARSET = 8,
157 ESC_STR_END = 16, /* a final string was encountered */
158 ESC_TEST = 32, /* Enter in test mode */
159 };
160
161 enum window_state {
162 WIN_VISIBLE = 1,
163 WIN_REDRAW = 2,
164 WIN_FOCUSED = 4
165 };
166
167 enum selection_type {
168 SEL_REGULAR = 1,
169 SEL_RECTANGULAR = 2
170 };
171
172 enum selection_snap {
173 SNAP_WORD = 1,
174 SNAP_LINE = 2
175 };
176
177 typedef unsigned char uchar;
178 typedef unsigned int uint;
179 typedef unsigned long ulong;
180 typedef unsigned short ushort;
181
182 typedef struct {
183 char c[UTF_SIZ]; /* character code */
184 ushort mode; /* attribute flags */
185 uint32_t fg; /* foreground */
186 uint32_t bg; /* background */
187 } Glyph;
188
189 typedef Glyph *Line;
190
191 typedef struct {
192 Glyph attr; /* current char attributes */
193 int x;
194 int y;
195 char state;
196 } TCursor;
197
198 /* CSI Escape sequence structs */
199 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
200 typedef struct {
201 char buf[ESC_BUF_SIZ]; /* raw string */
202 int len; /* raw string length */
203 char priv;
204 int arg[ESC_ARG_SIZ];
205 int narg; /* nb of args */
206 char mode;
207 } CSIEscape;
208
209 /* STR Escape sequence structs */
210 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
211 typedef struct {
212 char type; /* ESC type ... */
213 char buf[STR_BUF_SIZ]; /* raw string */
214 int len; /* raw string length */
215 char *args[STR_ARG_SIZ];
216 int narg; /* nb of args */
217 } STREscape;
218
219 /* Internal representation of the screen */
220 typedef struct {
221 int row; /* nb row */
222 int col; /* nb col */
223 Line *line; /* screen */
224 Line *alt; /* alternate screen */
225 bool *dirty; /* dirtyness of lines */
226 TCursor c; /* cursor */
227 int top; /* top scroll limit */
228 int bot; /* bottom scroll limit */
229 int mode; /* terminal mode flags */
230 int esc; /* escape state flags */
231 char trantbl[4]; /* charset table translation */
232 int charset; /* current charset */
233 int icharset; /* selected charset for sequence */
234 bool numlock; /* lock numbers in keyboard */
235 bool *tabs;
236 } Term;
237
238 /* Purely graphic info */
239 typedef struct {
240 Display *dpy;
241 Colourmap cmap;
242 Window win;
243 Drawable buf;
244 Atom xembed, wmdeletewin, netwmname, netwmpid;
245 XIM xim;
246 XIC xic;
247 Draw draw;
248 Visual *vis;
249 XSetWindowAttributes attrs;
250 int scr;
251 bool isfixed; /* is fixed geometry? */
252 int fx, fy, fw, fh; /* fixed geometry */
253 int tw, th; /* tty width and height */
254 int w, h; /* window width and height */
255 int ch; /* char height */
256 int cw; /* char width */
257 char state; /* focus, redraw, visible */
258 } XWindow;
259
260 typedef struct {
261 uint b;
262 uint mask;
263 char *s;
264 } Mousekey;
265
266 typedef struct {
267 KeySym k;
268 uint mask;
269 char *s;
270 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
271 signed char appkey; /* application keypad */
272 signed char appcursor; /* application cursor */
273 signed char crlf; /* crlf mode */
274 } Key;
275
276 typedef struct {
277 int mode;
278 int type;
279 int snap;
280 /*
281 * Selection variables:
282 * nb – normalized coordinates of the beginning of the selection
283 * ne – normalized coordinates of the end of the selection
284 * ob – original coordinates of the beginning of the selection
285 * oe – original coordinates of the end of the selection
286 */
287 struct {
288 int x, y;
289 } nb, ne, ob, oe;
290
291 char *clip;
292 Atom xtarget;
293 bool alt;
294 struct timeval tclick1;
295 struct timeval tclick2;
296 } Selection;
297
298 typedef union {
299 int i;
300 unsigned int ui;
301 float f;
302 const void *v;
303 } Arg;
304
305 typedef struct {
306 unsigned int mod;
307 KeySym keysym;
308 void (*func)(const Arg *);
309 const Arg arg;
310 } Shortcut;
311
312 /* function definitions used in config.h */
313 static void clippaste(const Arg *);
314 static void numlock(const Arg *);
315 static void selpaste(const Arg *);
316 static void xzoom(const Arg *);
317
318 /* Config.h for applying patches and the configuration. */
319 #include "config.h"
320
321 /* Font structure */
322 typedef struct {
323 int height;
324 int width;
325 int ascent;
326 int descent;
327 short lbearing;
328 short rbearing;
329 XftFont *match;
330 FcFontSet *set;
331 FcPattern *pattern;
332 } Font;
333
334 /* Drawing Context */
335 typedef struct {
336 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
337 Font font, bfont, ifont, ibfont;
338 GC gc;
339 } DC;
340
341 static void die(const char *, ...);
342 static void draw(void);
343 static void redraw(int);
344 static void drawregion(int, int, int, int);
345 static void execsh(void);
346 static void sigchld(int);
347 static void run(void);
348
349 static void csidump(void);
350 static void csihandle(void);
351 static void csiparse(void);
352 static void csireset(void);
353 static void strdump(void);
354 static void strhandle(void);
355 static void strparse(void);
356 static void strreset(void);
357
358 static int tattrset(int);
359 static void tclearregion(int, int, int, int);
360 static void tcursor(int);
361 static void tdeletechar(int);
362 static void tdeleteline(int);
363 static void tinsertblank(int);
364 static void tinsertblankline(int);
365 static void tmoveto(int, int);
366 static void tmoveato(int x, int y);
367 static void tnew(int, int);
368 static void tnewline(int);
369 static void tputtab(bool);
370 static void tputc(char *, int);
371 static void treset(void);
372 static int tresize(int, int);
373 static void tscrollup(int, int);
374 static void tscrolldown(int, int);
375 static void tsetattr(int*, int);
376 static void tsetchar(char *, Glyph *, int, int);
377 static void tsetscroll(int, int);
378 static void tswapscreen(void);
379 static void tsetdirt(int, int);
380 static void tsetdirtattr(int);
381 static void tsetmode(bool, bool, int *, int);
382 static void tfulldirt(void);
383 static void techo(char *, int);
384 static int32_t tdefcolor(int *, int *, int);
385 static void tselcs(void);
386 static void tdeftran(char);
387 static inline bool match(uint, uint);
388 static void ttynew(void);
389 static void ttyread(void);
390 static void ttyresize(void);
391 static void ttysend(char *, size_t);
392 static void ttywrite(const char *, size_t);
393
394 static void xdraws(char *, Glyph, int, int, int, int);
395 static void xhints(void);
396 static void xclear(int, int, int, int);
397 static void xdrawcursor(void);
398 static void xinit(void);
399 static void xloadcols(void);
400 static int xsetcolorname(int, const char *);
401 static int xloadfont(Font *, FcPattern *);
402 static void xloadfonts(char *, double);
403 static int xloadfontset(Font *);
404 static void xsettitle(char *);
405 static void xresettitle(void);
406 static void xsetpointermotion(int);
407 static void xseturgency(int);
408 static void xsetsel(char*);
409 static void xtermclear(int, int, int, int);
410 static void xunloadfont(Font *f);
411 static void xunloadfonts(void);
412 static void xresize(int, int);
413
414 static void expose(XEvent *);
415 static void visibility(XEvent *);
416 static void unmap(XEvent *);
417 static char *kmap(KeySym, uint);
418 static void kpress(XEvent *);
419 static void cmessage(XEvent *);
420 static void cresize(int, int);
421 static void resize(XEvent *);
422 static void focus(XEvent *);
423 static void brelease(XEvent *);
424 static void bpress(XEvent *);
425 static void bmotion(XEvent *);
426 static void selnotify(XEvent *);
427 static void selclear(XEvent *);
428 static void selrequest(XEvent *);
429
430 static void selinit(void);
431 static void selsort(void);
432 static inline bool selected(int, int);
433 static void selcopy(void);
434 static void selscroll(int, int);
435 static void selsnap(int, int *, int *, int);
436
437 static int utf8decode(char *, long *);
438 static int utf8encode(long *, char *);
439 static int utf8size(char *);
440 static int isfullutf8(char *, int);
441
442 static ssize_t xwrite(int, char *, size_t);
443 static void *xmalloc(size_t);
444 static void *xrealloc(void *, size_t);
445 static char *xstrdup(char *s);
446
447 static void (*handler[LASTEvent])(XEvent *) = {
448 [KeyPress] = kpress,
449 [ClientMessage] = cmessage,
450 [ConfigureNotify] = resize,
451 [VisibilityNotify] = visibility,
452 [UnmapNotify] = unmap,
453 [Expose] = expose,
454 [FocusIn] = focus,
455 [FocusOut] = focus,
456 [MotionNotify] = bmotion,
457 [ButtonPress] = bpress,
458 [ButtonRelease] = brelease,
459 [SelectionClear] = selclear,
460 [SelectionNotify] = selnotify,
461 [SelectionRequest] = selrequest,
462 };
463
464 /* Globals */
465 static DC dc;
466 static XWindow xw;
467 static Term term;
468 static CSIEscape csiescseq;
469 static STREscape strescseq;
470 static int cmdfd;
471 static pid_t pid;
472 static Selection sel;
473 static int iofd;
474 static char **opt_cmd = NULL;
475 static char *opt_io = NULL;
476 static char *opt_title = NULL;
477 static char *opt_embed = NULL;
478 static char *opt_class = NULL;
479 static char *opt_font = NULL;
480 static int oldbutton = 3; /* button event on startup: 3 = release */
481
482 static char *usedfont = NULL;
483 static double usedfontsize = 0;
484
485 /* Font Ring Cache */
486 enum {
487 FRC_NORMAL,
488 FRC_ITALIC,
489 FRC_BOLD,
490 FRC_ITALICBOLD
491 };
492
493 typedef struct {
494 XftFont *font;
495 int flags;
496 } Fontcache;
497
498 /* Fontcache is an array now. A new font will be appended to the array. */
499 static Fontcache frc[16];
500 static int frclen = 0;
501
502 ssize_t
503 xwrite(int fd, char *s, size_t len) {
504 size_t aux = len;
505
506 while(len > 0) {
507 ssize_t r = write(fd, s, len);
508 if(r < 0)
509 return r;
510 len -= r;
511 s += r;
512 }
513 return aux;
514 }
515
516 void *
517 xmalloc(size_t len) {
518 void *p = malloc(len);
519
520 if(!p)
521 die("Out of memory\n");
522
523 return p;
524 }
525
526 void *
527 xrealloc(void *p, size_t len) {
528 if((p = realloc(p, len)) == NULL)
529 die("Out of memory\n");
530
531 return p;
532 }
533
534 char *
535 xstrdup(char *s) {
536 char *p = strdup(s);
537
538 if (!p)
539 die("Out of memory\n");
540
541 return p;
542 }
543
544 int
545 utf8decode(char *s, long *u) {
546 uchar c;
547 int i, n, rtn;
548
549 rtn = 1;
550 c = *s;
551 if(~c & 0x80) { /* 0xxxxxxx */
552 *u = c;
553 return rtn;
554 } else if((c & 0xE0) == 0xC0) { /* 110xxxxx */
555 *u = c & 0x1F;
556 n = 1;
557 } else if((c & 0xF0) == 0xE0) { /* 1110xxxx */
558 *u = c & 0x0F;
559 n = 2;
560 } else if((c & 0xF8) == 0xF0) { /* 11110xxx */
561 *u = c & 0x07;
562 n = 3;
563 } else {
564 goto invalid;
565 }
566
567 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
568 c = *s;
569 if((c & 0xC0) != 0x80) /* 10xxxxxx */
570 goto invalid;
571 *u <<= 6;
572 *u |= c & 0x3F;
573 }
574
575 if((n == 1 && *u < 0x80) ||
576 (n == 2 && *u < 0x800) ||
577 (n == 3 && *u < 0x10000) ||
578 (*u >= 0xD800 && *u <= 0xDFFF)) {
579 goto invalid;
580 }
581
582 return rtn;
583 invalid:
584 *u = 0xFFFD;
585
586 return rtn;
587 }
588
589 int
590 utf8encode(long *u, char *s) {
591 uchar *sp;
592 ulong uc;
593 int i, n;
594
595 sp = (uchar *)s;
596 uc = *u;
597 if(uc < 0x80) {
598 *sp = uc; /* 0xxxxxxx */
599 return 1;
600 } else if(*u < 0x800) {
601 *sp = (uc >> 6) | 0xC0; /* 110xxxxx */
602 n = 1;
603 } else if(uc < 0x10000) {
604 *sp = (uc >> 12) | 0xE0; /* 1110xxxx */
605 n = 2;
606 } else if(uc <= 0x10FFFF) {
607 *sp = (uc >> 18) | 0xF0; /* 11110xxx */
608 n = 3;
609 } else {
610 goto invalid;
611 }
612
613 for(i=n,++sp; i>0; --i,++sp)
614 *sp = ((uc >> 6*(i-1)) & 0x3F) | 0x80; /* 10xxxxxx */
615
616 return n+1;
617 invalid:
618 /* U+FFFD */
619 *s++ = '\xEF';
620 *s++ = '\xBF';
621 *s = '\xBD';
622
623 return 3;
624 }
625
626 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
627 UTF-8 otherwise return 0 */
628 int
629 isfullutf8(char *s, int b) {
630 uchar *c1, *c2, *c3;
631
632 c1 = (uchar *)s;
633 c2 = (uchar *)++s;
634 c3 = (uchar *)++s;
635 if(b < 1) {
636 return 0;
637 } else if((*c1 & 0xE0) == 0xC0 && b == 1) {
638 return 0;
639 } else if((*c1 & 0xF0) == 0xE0 &&
640 ((b == 1) ||
641 ((b == 2) && (*c2 & 0xC0) == 0x80))) {
642 return 0;
643 } else if((*c1 & 0xF8) == 0xF0 &&
644 ((b == 1) ||
645 ((b == 2) && (*c2 & 0xC0) == 0x80) ||
646 ((b == 3) && (*c2 & 0xC0) == 0x80 && (*c3 & 0xC0) == 0x80))) {
647 return 0;
648 } else {
649 return 1;
650 }
651 }
652
653 int
654 utf8size(char *s) {
655 uchar c = *s;
656
657 if(~c & 0x80) {
658 return 1;
659 } else if((c & 0xE0) == 0xC0) {
660 return 2;
661 } else if((c & 0xF0) == 0xE0) {
662 return 3;
663 } else {
664 return 4;
665 }
666 }
667
668 static void
669 selinit(void) {
670 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
671 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
672 sel.mode = 0;
673 sel.ob.x = -1;
674 sel.clip = NULL;
675 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
676 if(sel.xtarget == None)
677 sel.xtarget = XA_STRING;
678 }
679
680 static int
681 x2col(int x) {
682 x -= borderpx;
683 x /= xw.cw;
684
685 return LIMIT(x, 0, term.col-1);
686 }
687
688 static int
689 y2row(int y) {
690 y -= borderpx;
691 y /= xw.ch;
692
693 return LIMIT(y, 0, term.row-1);
694 }
695
696 static void
697 selsort(void) {
698 if(sel.ob.y == sel.oe.y) {
699 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
700 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
701 } else {
702 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
703 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
704 }
705 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
706 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
707 }
708
709 static inline bool
710 selected(int x, int y) {
711 if(sel.ne.y == y && sel.nb.y == y)
712 return BETWEEN(x, sel.nb.x, sel.ne.x);
713
714 if(sel.type == SEL_RECTANGULAR) {
715 return ((sel.nb.y <= y && y <= sel.ne.y)
716 && (sel.nb.x <= x && x <= sel.ne.x));
717 }
718
719 return ((sel.nb.y < y && y < sel.ne.y)
720 || (y == sel.ne.y && x <= sel.ne.x))
721 || (y == sel.nb.y && x >= sel.nb.x
722 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
723 }
724
725 void
726 selsnap(int mode, int *x, int *y, int direction) {
727 int i;
728
729 switch(mode) {
730 case SNAP_WORD:
731 /*
732 * Snap around if the word wraps around at the end or
733 * beginning of a line.
734 */
735 for(;;) {
736 if(direction < 0 && *x <= 0) {
737 if(*y > 0 && term.line[*y - 1][term.col-1].mode
738 & ATTR_WRAP) {
739 *y -= 1;
740 *x = term.col-1;
741 } else {
742 break;
743 }
744 }
745 if(direction > 0 && *x >= term.col-1) {
746 if(*y < term.row-1 && term.line[*y][*x].mode
747 & ATTR_WRAP) {
748 *y += 1;
749 *x = 0;
750 } else {
751 break;
752 }
753 }
754
755 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
756 *x += direction;
757 continue;
758 }
759
760 if(strchr(worddelimiters,
761 term.line[*y][*x+direction].c[0])) {
762 break;
763 }
764
765 *x += direction;
766 }
767 break;
768 case SNAP_LINE:
769 /*
770 * Snap around if the the previous line or the current one
771 * has set ATTR_WRAP at its end. Then the whole next or
772 * previous line will be selected.
773 */
774 *x = (direction < 0) ? 0 : term.col - 1;
775 if(direction < 0 && *y > 0) {
776 for(; *y > 0; *y += direction) {
777 if(!(term.line[*y-1][term.col-1].mode
778 & ATTR_WRAP)) {
779 break;
780 }
781 }
782 } else if(direction > 0 && *y < term.row-1) {
783 for(; *y < term.row; *y += direction) {
784 if(!(term.line[*y][term.col-1].mode
785 & ATTR_WRAP)) {
786 break;
787 }
788 }
789 }
790 break;
791 default:
792 /*
793 * Select the whole line when the end of line is reached.
794 */
795 if(direction > 0) {
796 i = term.col;
797 while(--i > 0 && term.line[*y][i].c[0] == ' ')
798 /* nothing */;
799 if(i > 0 && i < *x)
800 *x = term.col - 1;
801 }
802 break;
803 }
804 }
805
806 void
807 getbuttoninfo(XEvent *e) {
808 int type;
809 uint state = e->xbutton.state &~Button1Mask;
810
811 sel.alt = IS_SET(MODE_ALTSCREEN);
812
813 sel.oe.x = x2col(e->xbutton.x);
814 sel.oe.y = y2row(e->xbutton.y);
815
816 if(sel.ob.y < sel.oe.y
817 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
818 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
819 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
820 } else {
821 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
822 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
823 }
824 selsort();
825
826 sel.type = SEL_REGULAR;
827 for(type = 1; type < LEN(selmasks); ++type) {
828 if(match(selmasks[type], state)) {
829 sel.type = type;
830 break;
831 }
832 }
833 }
834
835 void
836 mousereport(XEvent *e) {
837 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
838 button = e->xbutton.button, state = e->xbutton.state,
839 len;
840 char buf[40];
841 static int ox, oy;
842
843 /* from urxvt */
844 if(e->xbutton.type == MotionNotify) {
845 if(x == ox && y == oy)
846 return;
847 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
848 return;
849 /* MOUSE_MOTION: no reporting if no button is pressed */
850 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
851 return;
852
853 button = oldbutton + 32;
854 ox = x;
855 oy = y;
856 } else {
857 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
858 button = 3;
859 } else {
860 button -= Button1;
861 if(button >= 3)
862 button += 64 - 3;
863 }
864 if(e->xbutton.type == ButtonPress) {
865 oldbutton = button;
866 ox = x;
867 oy = y;
868 } else if(e->xbutton.type == ButtonRelease) {
869 oldbutton = 3;
870 /* MODE_MOUSEX10: no button release reporting */
871 if(IS_SET(MODE_MOUSEX10))
872 return;
873 }
874 }
875
876 if(!IS_SET(MODE_MOUSEX10)) {
877 button += (state & ShiftMask ? 4 : 0)
878 + (state & Mod4Mask ? 8 : 0)
879 + (state & ControlMask ? 16 : 0);
880 }
881
882 len = 0;
883 if(IS_SET(MODE_MOUSESGR)) {
884 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
885 button, x+1, y+1,
886 e->xbutton.type == ButtonRelease ? 'm' : 'M');
887 } else if(x < 223 && y < 223) {
888 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
889 32+button, 32+x+1, 32+y+1);
890 } else {
891 return;
892 }
893
894 ttywrite(buf, len);
895 }
896
897 void
898 bpress(XEvent *e) {
899 struct timeval now;
900 Mousekey *mk;
901
902 if(IS_SET(MODE_MOUSE)) {
903 mousereport(e);
904 return;
905 }
906
907 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
908 if(e->xbutton.button == mk->b
909 && match(mk->mask, e->xbutton.state)) {
910 ttysend(mk->s, strlen(mk->s));
911 return;
912 }
913 }
914
915 if(e->xbutton.button == Button1) {
916 gettimeofday(&now, NULL);
917
918 /* Clear previous selection, logically and visually. */
919 selclear(NULL);
920 sel.mode = 1;
921 sel.type = SEL_REGULAR;
922 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
923 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
924
925 /*
926 * If the user clicks below predefined timeouts specific
927 * snapping behaviour is exposed.
928 */
929 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
930 sel.snap = SNAP_LINE;
931 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
932 sel.snap = SNAP_WORD;
933 } else {
934 sel.snap = 0;
935 }
936 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
937 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
938 selsort();
939
940 /*
941 * Draw selection, unless it's regular and we don't want to
942 * make clicks visible
943 */
944 if(sel.snap != 0) {
945 sel.mode++;
946 tsetdirt(sel.nb.y, sel.ne.y);
947 }
948 sel.tclick2 = sel.tclick1;
949 sel.tclick1 = now;
950 }
951 }
952
953 void
954 selcopy(void) {
955 char *str, *ptr;
956 int x, y, bufsize, size, i, ex;
957 Glyph *gp, *last;
958
959 if(sel.ob.x == -1) {
960 str = NULL;
961 } else {
962 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
963 ptr = str = xmalloc(bufsize);
964
965 /* append every set & selected glyph to the selection */
966 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
967 gp = &term.line[y][0];
968 last = &gp[term.col-1];
969
970 while(last >= gp && !(selected(last - gp, y) &&
971 strcmp(last->c, " ") != 0)) {
972 --last;
973 }
974
975 for(x = 0; gp <= last; x++, ++gp) {
976 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
977 continue;
978
979 size = utf8size(gp->c);
980 memcpy(ptr, gp->c, size);
981 ptr += size;
982 }
983
984 /*
985 * Copy and pasting of line endings is inconsistent
986 * in the inconsistent terminal and GUI world.
987 * The best solution seems like to produce '\n' when
988 * something is copied from st and convert '\n' to
989 * '\r', when something to be pasted is received by
990 * st.
991 * FIXME: Fix the computer world.
992 */
993 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
994 *ptr++ = '\n';
995
996 /*
997 * If the last selected line expands in the selection
998 * after the visible text '\n' is appended.
999 */
1000 if(y == sel.ne.y) {
1001 i = term.col;
1002 while(--i > 0 && term.line[y][i].c[0] == ' ')
1003 /* nothing */;
1004 ex = sel.ne.x;
1005 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
1006 ex = sel.nb.x;
1007 if(i < ex)
1008 *ptr++ = '\n';
1009 }
1010 }
1011 *ptr = 0;
1012 }
1013 xsetsel(str);
1014 }
1015
1016 void
1017 selnotify(XEvent *e) {
1018 ulong nitems, ofs, rem;
1019 int format;
1020 uchar *data, *last, *repl;
1021 Atom type;
1022
1023 ofs = 0;
1024 do {
1025 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
1026 False, AnyPropertyType, &type, &format,
1027 &nitems, &rem, &data)) {
1028 fprintf(stderr, "Clipboard allocation failed\n");
1029 return;
1030 }
1031
1032 /*
1033 * As seen in selcopy:
1034 * Line endings are inconsistent in the terminal and GUI world
1035 * copy and pasting. When receiving some selection data,
1036 * replace all '\n' with '\r'.
1037 * FIXME: Fix the computer world.
1038 */
1039 repl = data;
1040 last = data + nitems * format / 8;
1041 while((repl = memchr(repl, '\n', last - repl))) {
1042 *repl++ = '\r';
1043 }
1044
1045 if(IS_SET(MODE_BRCKTPASTE))
1046 ttywrite("\033[200~", 6);
1047 ttysend((char *)data, nitems * format / 8);
1048 if(IS_SET(MODE_BRCKTPASTE))
1049 ttywrite("\033[201~", 6);
1050 XFree(data);
1051 /* number of 32-bit chunks returned */
1052 ofs += nitems * format / 32;
1053 } while(rem > 0);
1054 }
1055
1056 void
1057 selpaste(const Arg *dummy) {
1058 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1059 xw.win, CurrentTime);
1060 }
1061
1062 void
1063 clippaste(const Arg *dummy) {
1064 Atom clipboard;
1065
1066 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1067 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1068 xw.win, CurrentTime);
1069 }
1070
1071 void
1072 selclear(XEvent *e) {
1073 if(sel.ob.x == -1)
1074 return;
1075 sel.ob.x = -1;
1076 tsetdirt(sel.nb.y, sel.ne.y);
1077 }
1078
1079 void
1080 selrequest(XEvent *e) {
1081 XSelectionRequestEvent *xsre;
1082 XSelectionEvent xev;
1083 Atom xa_targets, string;
1084
1085 xsre = (XSelectionRequestEvent *) e;
1086 xev.type = SelectionNotify;
1087 xev.requestor = xsre->requestor;
1088 xev.selection = xsre->selection;
1089 xev.target = xsre->target;
1090 xev.time = xsre->time;
1091 /* reject */
1092 xev.property = None;
1093
1094 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1095 if(xsre->target == xa_targets) {
1096 /* respond with the supported type */
1097 string = sel.xtarget;
1098 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1099 XA_ATOM, 32, PropModeReplace,
1100 (uchar *) &string, 1);
1101 xev.property = xsre->property;
1102 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1103 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1104 xsre->target, 8, PropModeReplace,
1105 (uchar *) sel.clip, strlen(sel.clip));
1106 xev.property = xsre->property;
1107 }
1108
1109 /* all done, send a notification to the listener */
1110 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1111 fprintf(stderr, "Error sending SelectionNotify event\n");
1112 }
1113
1114 void
1115 xsetsel(char *str) {
1116 /* register the selection for both the clipboard and the primary */
1117 Atom clipboard;
1118
1119 free(sel.clip);
1120 sel.clip = str;
1121
1122 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1123
1124 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1125 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1126 }
1127
1128 void
1129 brelease(XEvent *e) {
1130 if(IS_SET(MODE_MOUSE)) {
1131 mousereport(e);
1132 return;
1133 }
1134
1135 if(e->xbutton.button == Button2) {
1136 selpaste(NULL);
1137 } else if(e->xbutton.button == Button1) {
1138 if(sel.mode < 2) {
1139 selclear(NULL);
1140 } else {
1141 getbuttoninfo(e);
1142 selcopy();
1143 }
1144 sel.mode = 0;
1145 tsetdirt(sel.nb.y, sel.ne.y);
1146 }
1147 }
1148
1149 void
1150 bmotion(XEvent *e) {
1151 int oldey, oldex, oldsby, oldsey;
1152
1153 if(IS_SET(MODE_MOUSE)) {
1154 mousereport(e);
1155 return;
1156 }
1157
1158 if(!sel.mode)
1159 return;
1160
1161 sel.mode++;
1162 oldey = sel.oe.y;
1163 oldex = sel.oe.x;
1164 oldsby = sel.nb.y;
1165 oldsey = sel.ne.y;
1166 getbuttoninfo(e);
1167
1168 if(oldey != sel.oe.y || oldex != sel.oe.x)
1169 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1170 }
1171
1172 void
1173 die(const char *errstr, ...) {
1174 va_list ap;
1175
1176 va_start(ap, errstr);
1177 vfprintf(stderr, errstr, ap);
1178 va_end(ap);
1179 exit(EXIT_FAILURE);
1180 }
1181
1182 void
1183 execsh(void) {
1184 char **args;
1185 char *envshell = getenv("SHELL");
1186 const struct passwd *pass = getpwuid(getuid());
1187 char buf[sizeof(long) * 8 + 1];
1188
1189 unsetenv("COLUMNS");
1190 unsetenv("LINES");
1191 unsetenv("TERMCAP");
1192
1193 if(pass) {
1194 setenv("LOGNAME", pass->pw_name, 1);
1195 setenv("USER", pass->pw_name, 1);
1196 setenv("SHELL", pass->pw_shell, 0);
1197 setenv("HOME", pass->pw_dir, 0);
1198 }
1199
1200 snprintf(buf, sizeof(buf), "%lu", xw.win);
1201 setenv("WINDOWID", buf, 1);
1202
1203 signal(SIGCHLD, SIG_DFL);
1204 signal(SIGHUP, SIG_DFL);
1205 signal(SIGINT, SIG_DFL);
1206 signal(SIGQUIT, SIG_DFL);
1207 signal(SIGTERM, SIG_DFL);
1208 signal(SIGALRM, SIG_DFL);
1209
1210 DEFAULT(envshell, shell);
1211 setenv("TERM", termname, 1);
1212 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1213 execvp(args[0], args);
1214 exit(EXIT_FAILURE);
1215 }
1216
1217 void
1218 sigchld(int a) {
1219 int stat = 0;
1220
1221 if(waitpid(pid, &stat, 0) < 0)
1222 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1223
1224 if(WIFEXITED(stat)) {
1225 exit(WEXITSTATUS(stat));
1226 } else {
1227 exit(EXIT_FAILURE);
1228 }
1229 }
1230
1231 void
1232 ttynew(void) {
1233 int m, s;
1234 struct winsize w = {term.row, term.col, 0, 0};
1235
1236 /* seems to work fine on linux, openbsd and freebsd */
1237 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1238 die("openpty failed: %s\n", SERRNO);
1239
1240 switch(pid = fork()) {
1241 case -1:
1242 die("fork failed\n");
1243 break;
1244 case 0:
1245 setsid(); /* create a new process group */
1246 dup2(s, STDIN_FILENO);
1247 dup2(s, STDOUT_FILENO);
1248 dup2(s, STDERR_FILENO);
1249 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1250 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1251 close(s);
1252 close(m);
1253 execsh();
1254 break;
1255 default:
1256 close(s);
1257 cmdfd = m;
1258 signal(SIGCHLD, sigchld);
1259 if(opt_io) {
1260 term.mode |= MODE_PRINT;
1261 iofd = (!strcmp(opt_io, "-")) ?
1262 STDOUT_FILENO :
1263 open(opt_io, O_WRONLY | O_CREAT, 0666);
1264 if(iofd < 0) {
1265 fprintf(stderr, "Error opening %s:%s\n",
1266 opt_io, strerror(errno));
1267 }
1268 }
1269 }
1270 }
1271
1272 void
1273 dump(char c) {
1274 static int col;
1275
1276 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1277 if(++col % 10 == 0)
1278 fprintf(stderr, "\n");
1279 }
1280
1281 void
1282 ttyread(void) {
1283 static char buf[BUFSIZ];
1284 static int buflen = 0;
1285 char *ptr;
1286 char s[UTF_SIZ];
1287 int charsize; /* size of utf8 char in bytes */
1288 long utf8c;
1289 int ret;
1290
1291 /* append read bytes to unprocessed bytes */
1292 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1293 die("Couldn't read from shell: %s\n", SERRNO);
1294
1295 /* process every complete utf8 char */
1296 buflen += ret;
1297 ptr = buf;
1298 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1299 charsize = utf8decode(ptr, &utf8c);
1300 utf8encode(&utf8c, s);
1301 tputc(s, charsize);
1302 ptr += charsize;
1303 buflen -= charsize;
1304 }
1305
1306 /* keep any uncomplete utf8 char for the next call */
1307 memmove(buf, ptr, buflen);
1308 }
1309
1310 void
1311 ttywrite(const char *s, size_t n) {
1312 if(write(cmdfd, s, n) == -1)
1313 die("write error on tty: %s\n", SERRNO);
1314 }
1315
1316 void
1317 ttysend(char *s, size_t n) {
1318 ttywrite(s, n);
1319 if(IS_SET(MODE_ECHO))
1320 techo(s, n);
1321 }
1322
1323 void
1324 ttyresize(void) {
1325 struct winsize w;
1326
1327 w.ws_row = term.row;
1328 w.ws_col = term.col;
1329 w.ws_xpixel = xw.tw;
1330 w.ws_ypixel = xw.th;
1331 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1332 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1333 }
1334
1335 int
1336 tattrset(int attr) {
1337 int i, j;
1338
1339 for(i = 0; i < term.row-1; i++) {
1340 for(j = 0; j < term.col-1; j++) {
1341 if(term.line[i][j].mode & attr)
1342 return 1;
1343 }
1344 }
1345
1346 return 0;
1347 }
1348
1349 void
1350 tsetdirt(int top, int bot) {
1351 int i;
1352
1353 LIMIT(top, 0, term.row-1);
1354 LIMIT(bot, 0, term.row-1);
1355
1356 for(i = top; i <= bot; i++)
1357 term.dirty[i] = 1;
1358 }
1359
1360 void
1361 tsetdirtattr(int attr) {
1362 int i, j;
1363
1364 for(i = 0; i < term.row-1; i++) {
1365 for(j = 0; j < term.col-1; j++) {
1366 if(term.line[i][j].mode & attr) {
1367 tsetdirt(i, i);
1368 break;
1369 }
1370 }
1371 }
1372 }
1373
1374 void
1375 tfulldirt(void) {
1376 tsetdirt(0, term.row-1);
1377 }
1378
1379 void
1380 tcursor(int mode) {
1381 static TCursor c[2];
1382 bool alt = IS_SET(MODE_ALTSCREEN);
1383
1384 if(mode == CURSOR_SAVE) {
1385 c[alt] = term.c;
1386 } else if(mode == CURSOR_LOAD) {
1387 term.c = c[alt];
1388 tmoveto(c[alt].x, c[alt].y);
1389 }
1390 }
1391
1392 void
1393 treset(void) {
1394 uint i;
1395
1396 term.c = (TCursor){{
1397 .mode = ATTR_NULL,
1398 .fg = defaultfg,
1399 .bg = defaultbg
1400 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1401
1402 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1403 for(i = tabspaces; i < term.col; i += tabspaces)
1404 term.tabs[i] = 1;
1405 term.top = 0;
1406 term.bot = term.row - 1;
1407 term.mode = MODE_WRAP;
1408 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1409 term.charset = 0;
1410
1411 tclearregion(0, 0, term.col-1, term.row-1);
1412 tmoveto(0, 0);
1413 tcursor(CURSOR_SAVE);
1414 }
1415
1416 void
1417 tnew(int col, int row) {
1418 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1419 tresize(col, row);
1420 term.numlock = 1;
1421
1422 treset();
1423 }
1424
1425 void
1426 tswapscreen(void) {
1427 Line *tmp = term.line;
1428
1429 term.line = term.alt;
1430 term.alt = tmp;
1431 term.mode ^= MODE_ALTSCREEN;
1432 tfulldirt();
1433 }
1434
1435 void
1436 tscrolldown(int orig, int n) {
1437 int i;
1438 Line temp;
1439
1440 LIMIT(n, 0, term.bot-orig+1);
1441
1442 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1443
1444 for(i = term.bot; i >= orig+n; i--) {
1445 temp = term.line[i];
1446 term.line[i] = term.line[i-n];
1447 term.line[i-n] = temp;
1448
1449 term.dirty[i] = 1;
1450 term.dirty[i-n] = 1;
1451 }
1452
1453 selscroll(orig, n);
1454 }
1455
1456 void
1457 tscrollup(int orig, int n) {
1458 int i;
1459 Line temp;
1460 LIMIT(n, 0, term.bot-orig+1);
1461
1462 tclearregion(0, orig, term.col-1, orig+n-1);
1463
1464 for(i = orig; i <= term.bot-n; i++) {
1465 temp = term.line[i];
1466 term.line[i] = term.line[i+n];
1467 term.line[i+n] = temp;
1468
1469 term.dirty[i] = 1;
1470 term.dirty[i+n] = 1;
1471 }
1472
1473 selscroll(orig, -n);
1474 }
1475
1476 void
1477 selscroll(int orig, int n) {
1478 if(sel.ob.x == -1)
1479 return;
1480
1481 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1482 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1483 selclear(NULL);
1484 return;
1485 }
1486 if(sel.type == SEL_RECTANGULAR) {
1487 if(sel.ob.y < term.top)
1488 sel.ob.y = term.top;
1489 if(sel.oe.y > term.bot)
1490 sel.oe.y = term.bot;
1491 } else {
1492 if(sel.ob.y < term.top) {
1493 sel.ob.y = term.top;
1494 sel.ob.x = 0;
1495 }
1496 if(sel.oe.y > term.bot) {
1497 sel.oe.y = term.bot;
1498 sel.oe.x = term.col;
1499 }
1500 }
1501 selsort();
1502 }
1503 }
1504
1505 void
1506 tnewline(int first_col) {
1507 int y = term.c.y;
1508
1509 if(y == term.bot) {
1510 tscrollup(term.top, 1);
1511 } else {
1512 y++;
1513 }
1514 tmoveto(first_col ? 0 : term.c.x, y);
1515 }
1516
1517 void
1518 csiparse(void) {
1519 char *p = csiescseq.buf, *np;
1520 long int v;
1521
1522 csiescseq.narg = 0;
1523 if(*p == '?') {
1524 csiescseq.priv = 1;
1525 p++;
1526 }
1527
1528 csiescseq.buf[csiescseq.len] = '\0';
1529 while(p < csiescseq.buf+csiescseq.len) {
1530 np = NULL;
1531 v = strtol(p, &np, 10);
1532 if(np == p)
1533 v = 0;
1534 if(v == LONG_MAX || v == LONG_MIN)
1535 v = -1;
1536 csiescseq.arg[csiescseq.narg++] = v;
1537 p = np;
1538 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1539 break;
1540 p++;
1541 }
1542 csiescseq.mode = *p;
1543 }
1544
1545 /* for absolute user moves, when decom is set */
1546 void
1547 tmoveato(int x, int y) {
1548 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1549 }
1550
1551 void
1552 tmoveto(int x, int y) {
1553 int miny, maxy;
1554
1555 if(term.c.state & CURSOR_ORIGIN) {
1556 miny = term.top;
1557 maxy = term.bot;
1558 } else {
1559 miny = 0;
1560 maxy = term.row - 1;
1561 }
1562 LIMIT(x, 0, term.col-1);
1563 LIMIT(y, miny, maxy);
1564 term.c.state &= ~CURSOR_WRAPNEXT;
1565 term.c.x = x;
1566 term.c.y = y;
1567 }
1568
1569 void
1570 tsetchar(char *c, Glyph *attr, int x, int y) {
1571 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1572 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1573 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1574 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1575 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1576 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1577 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1578 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1579 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1580 };
1581
1582 /*
1583 * The table is proudly stolen from rxvt.
1584 */
1585 if(attr->mode & ATTR_GFX) {
1586 if(c[0] >= 0x41 && c[0] <= 0x7e
1587 && vt100_0[c[0] - 0x41]) {
1588 c = vt100_0[c[0] - 0x41];
1589 }
1590 }
1591
1592 if(term.line[y][x].mode & ATTR_WIDE) {
1593 if(x+1 < term.col) {
1594 term.line[y][x+1].c[0] = ' ';
1595 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1596 }
1597 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1598 term.line[y][x-1].c[0] = ' ';
1599 term.line[y][x-1].mode &= ~ATTR_WIDE;
1600 }
1601
1602 term.dirty[y] = 1;
1603 term.line[y][x] = *attr;
1604 memcpy(term.line[y][x].c, c, UTF_SIZ);
1605 }
1606
1607 void
1608 tclearregion(int x1, int y1, int x2, int y2) {
1609 int x, y, temp;
1610
1611 if(x1 > x2)
1612 temp = x1, x1 = x2, x2 = temp;
1613 if(y1 > y2)
1614 temp = y1, y1 = y2, y2 = temp;
1615
1616 LIMIT(x1, 0, term.col-1);
1617 LIMIT(x2, 0, term.col-1);
1618 LIMIT(y1, 0, term.row-1);
1619 LIMIT(y2, 0, term.row-1);
1620
1621 for(y = y1; y <= y2; y++) {
1622 term.dirty[y] = 1;
1623 for(x = x1; x <= x2; x++) {
1624 if(selected(x, y))
1625 selclear(NULL);
1626 term.line[y][x] = term.c.attr;
1627 memcpy(term.line[y][x].c, " ", 2);
1628 }
1629 }
1630 }
1631
1632 void
1633 tdeletechar(int n) {
1634 int src = term.c.x + n;
1635 int dst = term.c.x;
1636 int size = term.col - src;
1637
1638 term.dirty[term.c.y] = 1;
1639
1640 if(src >= term.col) {
1641 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1642 return;
1643 }
1644
1645 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1646 size * sizeof(Glyph));
1647 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1648 }
1649
1650 void
1651 tinsertblank(int n) {
1652 int src = term.c.x;
1653 int dst = src + n;
1654 int size = term.col - dst;
1655
1656 term.dirty[term.c.y] = 1;
1657
1658 if(dst >= term.col) {
1659 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1660 return;
1661 }
1662
1663 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1664 size * sizeof(Glyph));
1665 tclearregion(src, term.c.y, dst - 1, term.c.y);
1666 }
1667
1668 void
1669 tinsertblankline(int n) {
1670 if(term.c.y < term.top || term.c.y > term.bot)
1671 return;
1672
1673 tscrolldown(term.c.y, n);
1674 }
1675
1676 void
1677 tdeleteline(int n) {
1678 if(term.c.y < term.top || term.c.y > term.bot)
1679 return;
1680
1681 tscrollup(term.c.y, n);
1682 }
1683
1684 int32_t
1685 tdefcolor(int *attr, int *npar, int l) {
1686 int32_t idx = -1;
1687 uint r, g, b;
1688
1689 switch (attr[*npar + 1]) {
1690 case 2: /* direct colour in RGB space */
1691 if (*npar + 4 >= l) {
1692 fprintf(stderr,
1693 "erresc(38): Incorrect number of parameters (%d)\n",
1694 *npar);
1695 break;
1696 }
1697 r = attr[*npar + 2];
1698 g = attr[*npar + 3];
1699 b = attr[*npar + 4];
1700 *npar += 4;
1701 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1702 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1703 r, g, b);
1704 else
1705 idx = TRUECOLOR(r, g, b);
1706 break;
1707 case 5: /* indexed colour */
1708 if (*npar + 2 >= l) {
1709 fprintf(stderr,
1710 "erresc(38): Incorrect number of parameters (%d)\n",
1711 *npar);
1712 break;
1713 }
1714 *npar += 2;
1715 if(!BETWEEN(attr[*npar], 0, 255))
1716 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1717 else
1718 idx = attr[*npar];
1719 break;
1720 case 0: /* implemented defined (only foreground) */
1721 case 1: /* transparent */
1722 case 3: /* direct colour in CMY space */
1723 case 4: /* direct colour in CMYK space */
1724 default:
1725 fprintf(stderr,
1726 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1727 }
1728
1729 return idx;
1730 }
1731
1732 void
1733 tsetattr(int *attr, int l) {
1734 int i;
1735 int32_t idx;
1736
1737 for(i = 0; i < l; i++) {
1738 switch(attr[i]) {
1739 case 0:
1740 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1741 | ATTR_BOLD | ATTR_ITALIC \
1742 | ATTR_BLINK);
1743 term.c.attr.fg = defaultfg;
1744 term.c.attr.bg = defaultbg;
1745 break;
1746 case 1:
1747 term.c.attr.mode |= ATTR_BOLD;
1748 break;
1749 case 3:
1750 term.c.attr.mode |= ATTR_ITALIC;
1751 break;
1752 case 4:
1753 term.c.attr.mode |= ATTR_UNDERLINE;
1754 break;
1755 case 5: /* slow blink */
1756 case 6: /* rapid blink */
1757 term.c.attr.mode |= ATTR_BLINK;
1758 break;
1759 case 7:
1760 term.c.attr.mode |= ATTR_REVERSE;
1761 break;
1762 case 21:
1763 case 22:
1764 term.c.attr.mode &= ~ATTR_BOLD;
1765 break;
1766 case 23:
1767 term.c.attr.mode &= ~ATTR_ITALIC;
1768 break;
1769 case 24:
1770 term.c.attr.mode &= ~ATTR_UNDERLINE;
1771 break;
1772 case 25:
1773 case 26:
1774 term.c.attr.mode &= ~ATTR_BLINK;
1775 break;
1776 case 27:
1777 term.c.attr.mode &= ~ATTR_REVERSE;
1778 break;
1779 case 38:
1780 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1781 term.c.attr.fg = idx;
1782 break;
1783 case 39:
1784 term.c.attr.fg = defaultfg;
1785 break;
1786 case 48:
1787 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1788 term.c.attr.bg = idx;
1789 break;
1790 case 49:
1791 term.c.attr.bg = defaultbg;
1792 break;
1793 default:
1794 if(BETWEEN(attr[i], 30, 37)) {
1795 term.c.attr.fg = attr[i] - 30;
1796 } else if(BETWEEN(attr[i], 40, 47)) {
1797 term.c.attr.bg = attr[i] - 40;
1798 } else if(BETWEEN(attr[i], 90, 97)) {
1799 term.c.attr.fg = attr[i] - 90 + 8;
1800 } else if(BETWEEN(attr[i], 100, 107)) {
1801 term.c.attr.bg = attr[i] - 100 + 8;
1802 } else {
1803 fprintf(stderr,
1804 "erresc(default): gfx attr %d unknown\n",
1805 attr[i]), csidump();
1806 }
1807 break;
1808 }
1809 }
1810 }
1811
1812 void
1813 tsetscroll(int t, int b) {
1814 int temp;
1815
1816 LIMIT(t, 0, term.row-1);
1817 LIMIT(b, 0, term.row-1);
1818 if(t > b) {
1819 temp = t;
1820 t = b;
1821 b = temp;
1822 }
1823 term.top = t;
1824 term.bot = b;
1825 }
1826
1827 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1828
1829 void
1830 tsetmode(bool priv, bool set, int *args, int narg) {
1831 int *lim, mode;
1832 bool alt;
1833
1834 for(lim = args + narg; args < lim; ++args) {
1835 if(priv) {
1836 switch(*args) {
1837 break;
1838 case 1: /* DECCKM -- Cursor key */
1839 MODBIT(term.mode, set, MODE_APPCURSOR);
1840 break;
1841 case 5: /* DECSCNM -- Reverse video */
1842 mode = term.mode;
1843 MODBIT(term.mode, set, MODE_REVERSE);
1844 if(mode != term.mode)
1845 redraw(REDRAW_TIMEOUT);
1846 break;
1847 case 6: /* DECOM -- Origin */
1848 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1849 tmoveato(0, 0);
1850 break;
1851 case 7: /* DECAWM -- Auto wrap */
1852 MODBIT(term.mode, set, MODE_WRAP);
1853 break;
1854 case 0: /* Error (IGNORED) */
1855 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1856 case 3: /* DECCOLM -- Column (IGNORED) */
1857 case 4: /* DECSCLM -- Scroll (IGNORED) */
1858 case 8: /* DECARM -- Auto repeat (IGNORED) */
1859 case 18: /* DECPFF -- Printer feed (IGNORED) */
1860 case 19: /* DECPEX -- Printer extent (IGNORED) */
1861 case 42: /* DECNRCM -- National characters (IGNORED) */
1862 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1863 break;
1864 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1865 MODBIT(term.mode, !set, MODE_HIDE);
1866 break;
1867 case 9: /* X10 mouse compatibility mode */
1868 xsetpointermotion(0);
1869 MODBIT(term.mode, 0, MODE_MOUSE);
1870 MODBIT(term.mode, set, MODE_MOUSEX10);
1871 break;
1872 case 1000: /* 1000: report button press */
1873 xsetpointermotion(0);
1874 MODBIT(term.mode, 0, MODE_MOUSE);
1875 MODBIT(term.mode, set, MODE_MOUSEBTN);
1876 break;
1877 case 1002: /* 1002: report motion on button press */
1878 xsetpointermotion(0);
1879 MODBIT(term.mode, 0, MODE_MOUSE);
1880 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1881 break;
1882 case 1003: /* 1003: enable all mouse motions */
1883 xsetpointermotion(set);
1884 MODBIT(term.mode, 0, MODE_MOUSE);
1885 MODBIT(term.mode, set, MODE_MOUSEMANY);
1886 break;
1887 case 1004: /* 1004: send focus events to tty */
1888 MODBIT(term.mode, set, MODE_FOCUS);
1889 break;
1890 case 1006: /* 1006: extended reporting mode */
1891 MODBIT(term.mode, set, MODE_MOUSESGR);
1892 break;
1893 case 1034:
1894 MODBIT(term.mode, set, MODE_8BIT);
1895 break;
1896 case 1049: /* swap screen & set/restore cursor as xterm */
1897 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1898 case 47: /* swap screen */
1899 case 1047:
1900 if (!allowaltscreen)
1901 break;
1902 alt = IS_SET(MODE_ALTSCREEN);
1903 if(alt) {
1904 tclearregion(0, 0, term.col-1,
1905 term.row-1);
1906 }
1907 if(set ^ alt) /* set is always 1 or 0 */
1908 tswapscreen();
1909 if(*args != 1049)
1910 break;
1911 /* FALLTRU */
1912 case 1048:
1913 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1914 break;
1915 case 2004: /* 2004: bracketed paste mode */
1916 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1917 break;
1918 /* Not implemented mouse modes. See comments there. */
1919 case 1001: /* mouse highlight mode; can hang the
1920 terminal by design when implemented. */
1921 case 1005: /* UTF-8 mouse mode; will confuse
1922 applications not supporting UTF-8
1923 and luit. */
1924 case 1015: /* urxvt mangled mouse mode; incompatible
1925 and can be mistaken for other control
1926 codes. */
1927 default:
1928 fprintf(stderr,
1929 "erresc: unknown private set/reset mode %d\n",
1930 *args);
1931 break;
1932 }
1933 } else {
1934 switch(*args) {
1935 case 0: /* Error (IGNORED) */
1936 break;
1937 case 2: /* KAM -- keyboard action */
1938 MODBIT(term.mode, set, MODE_KBDLOCK);
1939 break;
1940 case 4: /* IRM -- Insertion-replacement */
1941 MODBIT(term.mode, set, MODE_INSERT);
1942 break;
1943 case 12: /* SRM -- Send/Receive */
1944 MODBIT(term.mode, !set, MODE_ECHO);
1945 break;
1946 case 20: /* LNM -- Linefeed/new line */
1947 MODBIT(term.mode, set, MODE_CRLF);
1948 break;
1949 default:
1950 fprintf(stderr,
1951 "erresc: unknown set/reset mode %d\n",
1952 *args);
1953 break;
1954 }
1955 }
1956 }
1957 }
1958
1959 void
1960 csihandle(void) {
1961 char buf[40];
1962 int len;
1963
1964 switch(csiescseq.mode) {
1965 default:
1966 unknown:
1967 fprintf(stderr, "erresc: unknown csi ");
1968 csidump();
1969 /* die(""); */
1970 break;
1971 case '@': /* ICH -- Insert <n> blank char */
1972 DEFAULT(csiescseq.arg[0], 1);
1973 tinsertblank(csiescseq.arg[0]);
1974 break;
1975 case 'A': /* CUU -- Cursor <n> Up */
1976 DEFAULT(csiescseq.arg[0], 1);
1977 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1978 break;
1979 case 'B': /* CUD -- Cursor <n> Down */
1980 case 'e': /* VPR --Cursor <n> Down */
1981 DEFAULT(csiescseq.arg[0], 1);
1982 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1983 break;
1984 case 'i': /* MC -- Media Copy */
1985 switch(csiescseq.arg[0]) {
1986 case 0:
1987 case 1:
1988 case 4:
1989 term.mode &= ~MODE_PRINT;
1990 break;
1991 case 5:
1992 term.mode |= MODE_PRINT;
1993 break;
1994 }
1995 break;
1996 case 'c': /* DA -- Device Attributes */
1997 if(csiescseq.arg[0] == 0)
1998 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1999 break;
2000 case 'C': /* CUF -- Cursor <n> Forward */
2001 case 'a': /* HPR -- Cursor <n> Forward */
2002 DEFAULT(csiescseq.arg[0], 1);
2003 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2004 break;
2005 case 'D': /* CUB -- Cursor <n> Backward */
2006 DEFAULT(csiescseq.arg[0], 1);
2007 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2008 break;
2009 case 'E': /* CNL -- Cursor <n> Down and first col */
2010 DEFAULT(csiescseq.arg[0], 1);
2011 tmoveto(0, term.c.y+csiescseq.arg[0]);
2012 break;
2013 case 'F': /* CPL -- Cursor <n> Up and first col */
2014 DEFAULT(csiescseq.arg[0], 1);
2015 tmoveto(0, term.c.y-csiescseq.arg[0]);
2016 break;
2017 case 'g': /* TBC -- Tabulation clear */
2018 switch(csiescseq.arg[0]) {
2019 case 0: /* clear current tab stop */
2020 term.tabs[term.c.x] = 0;
2021 break;
2022 case 3: /* clear all the tabs */
2023 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2024 break;
2025 default:
2026 goto unknown;
2027 }
2028 break;
2029 case 'G': /* CHA -- Move to <col> */
2030 case '`': /* HPA */
2031 DEFAULT(csiescseq.arg[0], 1);
2032 tmoveto(csiescseq.arg[0]-1, term.c.y);
2033 break;
2034 case 'H': /* CUP -- Move to <row> <col> */
2035 case 'f': /* HVP */
2036 DEFAULT(csiescseq.arg[0], 1);
2037 DEFAULT(csiescseq.arg[1], 1);
2038 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2039 break;
2040 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2041 DEFAULT(csiescseq.arg[0], 1);
2042 while(csiescseq.arg[0]--)
2043 tputtab(1);
2044 break;
2045 case 'J': /* ED -- Clear screen */
2046 selclear(NULL);
2047 switch(csiescseq.arg[0]) {
2048 case 0: /* below */
2049 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2050 if(term.c.y < term.row-1) {
2051 tclearregion(0, term.c.y+1, term.col-1,
2052 term.row-1);
2053 }
2054 break;
2055 case 1: /* above */
2056 if(term.c.y > 1)
2057 tclearregion(0, 0, term.col-1, term.c.y-1);
2058 tclearregion(0, term.c.y, term.c.x, term.c.y);
2059 break;
2060 case 2: /* all */
2061 tclearregion(0, 0, term.col-1, term.row-1);
2062 break;
2063 default:
2064 goto unknown;
2065 }
2066 break;
2067 case 'K': /* EL -- Clear line */
2068 switch(csiescseq.arg[0]) {
2069 case 0: /* right */
2070 tclearregion(term.c.x, term.c.y, term.col-1,
2071 term.c.y);
2072 break;
2073 case 1: /* left */
2074 tclearregion(0, term.c.y, term.c.x, term.c.y);
2075 break;
2076 case 2: /* all */
2077 tclearregion(0, term.c.y, term.col-1, term.c.y);
2078 break;
2079 }
2080 break;
2081 case 'S': /* SU -- Scroll <n> line up */
2082 DEFAULT(csiescseq.arg[0], 1);
2083 tscrollup(term.top, csiescseq.arg[0]);
2084 break;
2085 case 'T': /* SD -- Scroll <n> line down */
2086 DEFAULT(csiescseq.arg[0], 1);
2087 tscrolldown(term.top, csiescseq.arg[0]);
2088 break;
2089 case 'L': /* IL -- Insert <n> blank lines */
2090 DEFAULT(csiescseq.arg[0], 1);
2091 tinsertblankline(csiescseq.arg[0]);
2092 break;
2093 case 'l': /* RM -- Reset Mode */
2094 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2095 break;
2096 case 'M': /* DL -- Delete <n> lines */
2097 DEFAULT(csiescseq.arg[0], 1);
2098 tdeleteline(csiescseq.arg[0]);
2099 break;
2100 case 'X': /* ECH -- Erase <n> char */
2101 DEFAULT(csiescseq.arg[0], 1);
2102 tclearregion(term.c.x, term.c.y,
2103 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2104 break;
2105 case 'P': /* DCH -- Delete <n> char */
2106 DEFAULT(csiescseq.arg[0], 1);
2107 tdeletechar(csiescseq.arg[0]);
2108 break;
2109 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2110 DEFAULT(csiescseq.arg[0], 1);
2111 while(csiescseq.arg[0]--)
2112 tputtab(0);
2113 break;
2114 case 'd': /* VPA -- Move to <row> */
2115 DEFAULT(csiescseq.arg[0], 1);
2116 tmoveato(term.c.x, csiescseq.arg[0]-1);
2117 break;
2118 case 'h': /* SM -- Set terminal mode */
2119 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2120 break;
2121 case 'm': /* SGR -- Terminal attribute (color) */
2122 tsetattr(csiescseq.arg, csiescseq.narg);
2123 break;
2124 case 'n': /* DSR – Device Status Report (cursor position) */
2125 if (csiescseq.arg[0] == 6) {
2126 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2127 term.c.y+1, term.c.x+1);
2128 ttywrite(buf, len);
2129 break;
2130 }
2131 case 'r': /* DECSTBM -- Set Scrolling Region */
2132 if(csiescseq.priv) {
2133 goto unknown;
2134 } else {
2135 DEFAULT(csiescseq.arg[0], 1);
2136 DEFAULT(csiescseq.arg[1], term.row);
2137 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2138 tmoveato(0, 0);
2139 }
2140 break;
2141 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2142 tcursor(CURSOR_SAVE);
2143 break;
2144 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2145 tcursor(CURSOR_LOAD);
2146 break;
2147 }
2148 }
2149
2150 void
2151 csidump(void) {
2152 int i;
2153 uint c;
2154
2155 printf("ESC[");
2156 for(i = 0; i < csiescseq.len; i++) {
2157 c = csiescseq.buf[i] & 0xff;
2158 if(isprint(c)) {
2159 putchar(c);
2160 } else if(c == '\n') {
2161 printf("(\\n)");
2162 } else if(c == '\r') {
2163 printf("(\\r)");
2164 } else if(c == 0x1b) {
2165 printf("(\\e)");
2166 } else {
2167 printf("(%02x)", c);
2168 }
2169 }
2170 putchar('\n');
2171 }
2172
2173 void
2174 csireset(void) {
2175 memset(&csiescseq, 0, sizeof(csiescseq));
2176 }
2177
2178 void
2179 strhandle(void) {
2180 char *p = NULL;
2181 int j, narg, par;
2182
2183 strparse();
2184 narg = strescseq.narg;
2185 par = atoi(strescseq.args[0]);
2186
2187 switch(strescseq.type) {
2188 case ']': /* OSC -- Operating System Command */
2189 switch(par) {
2190 case 0:
2191 case 1:
2192 case 2:
2193 if(narg > 1)
2194 xsettitle(strescseq.args[1]);
2195 return;
2196 case 4: /* color set */
2197 if(narg < 3)
2198 break;
2199 p = strescseq.args[2];
2200 /* fall through */
2201 case 104: /* color reset, here p = NULL */
2202 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2203 if (!xsetcolorname(j, p)) {
2204 fprintf(stderr, "erresc: invalid color %s\n", p);
2205 } else {
2206 /*
2207 * TODO if defaultbg color is changed, borders
2208 * are dirty
2209 */
2210 redraw(0);
2211 }
2212 return;
2213 }
2214 break;
2215 case 'k': /* old title set compatibility */
2216 xsettitle(strescseq.args[0]);
2217 return;
2218 case 'P': /* DSC -- Device Control String */
2219 case '_': /* APC -- Application Program Command */
2220 case '^': /* PM -- Privacy Message */
2221 return;
2222 }
2223
2224 fprintf(stderr, "erresc: unknown str ");
2225 strdump();
2226 }
2227
2228 void
2229 strparse(void) {
2230 char *p = strescseq.buf;
2231
2232 strescseq.narg = 0;
2233 strescseq.buf[strescseq.len] = '\0';
2234 while(p && strescseq.narg < STR_ARG_SIZ)
2235 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2236 }
2237
2238 void
2239 strdump(void) {
2240 int i;
2241 uint c;
2242
2243 printf("ESC%c", strescseq.type);
2244 for(i = 0; i < strescseq.len; i++) {
2245 c = strescseq.buf[i] & 0xff;
2246 if(c == '\0') {
2247 return;
2248 } else if(isprint(c)) {
2249 putchar(c);
2250 } else if(c == '\n') {
2251 printf("(\\n)");
2252 } else if(c == '\r') {
2253 printf("(\\r)");
2254 } else if(c == 0x1b) {
2255 printf("(\\e)");
2256 } else {
2257 printf("(%02x)", c);
2258 }
2259 }
2260 printf("ESC\\\n");
2261 }
2262
2263 void
2264 strreset(void) {
2265 memset(&strescseq, 0, sizeof(strescseq));
2266 }
2267
2268 void
2269 tputtab(bool forward) {
2270 uint x = term.c.x;
2271
2272 if(forward) {
2273 if(x == term.col)
2274 return;
2275 for(++x; x < term.col && !term.tabs[x]; ++x)
2276 /* nothing */ ;
2277 } else {
2278 if(x == 0)
2279 return;
2280 for(--x; x > 0 && !term.tabs[x]; --x)
2281 /* nothing */ ;
2282 }
2283 tmoveto(x, term.c.y);
2284 }
2285
2286 void
2287 techo(char *buf, int len) {
2288 for(; len > 0; buf++, len--) {
2289 char c = *buf;
2290
2291 if(c == '\033') { /* escape */
2292 tputc("^", 1);
2293 tputc("[", 1);
2294 } else if(c < '\x20') { /* control code */
2295 if(c != '\n' && c != '\r' && c != '\t') {
2296 c |= '\x40';
2297 tputc("^", 1);
2298 }
2299 tputc(&c, 1);
2300 } else {
2301 break;
2302 }
2303 }
2304 if(len)
2305 tputc(buf, len);
2306 }
2307
2308 void
2309 tdeftran(char ascii) {
2310 char c, (*bp)[2];
2311 static char tbl[][2] = {
2312 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2313 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2314 {'5', CS_FIN}, {'C', CS_FIN},
2315 {0, 0}
2316 };
2317
2318 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2319 /* nothing */;
2320
2321 if (c == 0)
2322 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2323 else
2324 term.trantbl[term.icharset] = (*bp)[1];
2325 }
2326
2327 void
2328 tselcs(void) {
2329 if (term.trantbl[term.charset] == CS_GRAPHIC0)
2330 term.c.attr.mode |= ATTR_GFX;
2331 else
2332 term.c.attr.mode &= ~ATTR_GFX;
2333 }
2334
2335 void
2336 tputc(char *c, int len) {
2337 uchar ascii = *c;
2338 bool control = ascii < '\x20' || ascii == 0177;
2339 long u8char;
2340 int width;
2341
2342 if(len == 1) {
2343 width = 1;
2344 } else {
2345 utf8decode(c, &u8char);
2346 width = wcwidth(u8char);
2347 }
2348
2349 if(IS_SET(MODE_PRINT) && iofd != -1) {
2350 if(xwrite(iofd, c, len) < 0) {
2351 fprintf(stderr, "Error writing in %s:%s\n",
2352 opt_io, strerror(errno));
2353 close(iofd);
2354 iofd = -1;
2355 }
2356 }
2357
2358 /*
2359 * STR sequences must be checked before anything else
2360 * because it can use some control codes as part of the sequence.
2361 */
2362 if(term.esc & ESC_STR) {
2363 switch(ascii) {
2364 case '\033':
2365 term.esc = ESC_START | ESC_STR_END;
2366 break;
2367 case '\a': /* backwards compatibility to xterm */
2368 term.esc = 0;
2369 strhandle();
2370 break;
2371 default:
2372 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2373 memmove(&strescseq.buf[strescseq.len], c, len);
2374 strescseq.len += len;
2375 } else {
2376 /*
2377 * Here is a bug in terminals. If the user never sends
2378 * some code to stop the str or esc command, then st
2379 * will stop responding. But this is better than
2380 * silently failing with unknown characters. At least
2381 * then users will report back.
2382 *
2383 * In the case users ever get fixed, here is the code:
2384 */
2385 /*
2386 * term.esc = 0;
2387 * strhandle();
2388 */
2389 }
2390 }
2391 return;
2392 }
2393
2394 /*
2395 * Actions of control codes must be performed as soon they arrive
2396 * because they can be embedded inside a control sequence, and
2397 * they must not cause conflicts with sequences.
2398 */
2399 if(control) {
2400 switch(ascii) {
2401 case '\t': /* HT */
2402 tputtab(1);
2403 return;
2404 case '\b': /* BS */
2405 tmoveto(term.c.x-1, term.c.y);
2406 return;
2407 case '\r': /* CR */
2408 tmoveto(0, term.c.y);
2409 return;
2410 case '\f': /* LF */
2411 case '\v': /* VT */
2412 case '\n': /* LF */
2413 /* go to first col if the mode is set */
2414 tnewline(IS_SET(MODE_CRLF));
2415 return;
2416 case '\a': /* BEL */
2417 if(!(xw.state & WIN_FOCUSED))
2418 xseturgency(1);
2419 if (bellvolume)
2420 XBell(xw.dpy, bellvolume);
2421 return;
2422 case '\033': /* ESC */
2423 csireset();
2424 term.esc = ESC_START;
2425 return;
2426 case '\016': /* SO */
2427 term.charset = 0;
2428 tselcs();
2429 return;
2430 case '\017': /* SI */
2431 term.charset = 1;
2432 tselcs();
2433 return;
2434 case '\032': /* SUB */
2435 case '\030': /* CAN */
2436 csireset();
2437 return;
2438 case '\005': /* ENQ (IGNORED) */
2439 case '\000': /* NUL (IGNORED) */
2440 case '\021': /* XON (IGNORED) */
2441 case '\023': /* XOFF (IGNORED) */
2442 case 0177: /* DEL (IGNORED) */
2443 return;
2444 }
2445 } else if(term.esc & ESC_START) {
2446 if(term.esc & ESC_CSI) {
2447 csiescseq.buf[csiescseq.len++] = ascii;
2448 if(BETWEEN(ascii, 0x40, 0x7E)
2449 || csiescseq.len >= \
2450 sizeof(csiescseq.buf)-1) {
2451 term.esc = 0;
2452 csiparse();
2453 csihandle();
2454 }
2455 } else if(term.esc & ESC_STR_END) {
2456 term.esc = 0;
2457 if(ascii == '\\')
2458 strhandle();
2459 } else if(term.esc & ESC_ALTCHARSET) {
2460 tdeftran(ascii);
2461 tselcs();
2462 term.esc = 0;
2463 } else if(term.esc & ESC_TEST) {
2464 if(ascii == '8') { /* DEC screen alignment test. */
2465 char E[UTF_SIZ] = "E";
2466 int x, y;
2467
2468 for(x = 0; x < term.col; ++x) {
2469 for(y = 0; y < term.row; ++y)
2470 tsetchar(E, &term.c.attr, x, y);
2471 }
2472 }
2473 term.esc = 0;
2474 } else {
2475 switch(ascii) {
2476 case '[':
2477 term.esc |= ESC_CSI;
2478 break;
2479 case '#':
2480 term.esc |= ESC_TEST;
2481 break;
2482 case 'P': /* DCS -- Device Control String */
2483 case '_': /* APC -- Application Program Command */
2484 case '^': /* PM -- Privacy Message */
2485 case ']': /* OSC -- Operating System Command */
2486 case 'k': /* old title set compatibility */
2487 strreset();
2488 strescseq.type = ascii;
2489 term.esc |= ESC_STR;
2490 break;
2491 case '(': /* set primary charset G0 */
2492 case ')': /* set secondary charset G1 */
2493 case '*': /* set tertiary charset G2 */
2494 case '+': /* set quaternary charset G3 */
2495 term.icharset = ascii - '(';
2496 term.esc |= ESC_ALTCHARSET;
2497 break;
2498 case 'D': /* IND -- Linefeed */
2499 if(term.c.y == term.bot) {
2500 tscrollup(term.top, 1);
2501 } else {
2502 tmoveto(term.c.x, term.c.y+1);
2503 }
2504 term.esc = 0;
2505 break;
2506 case 'E': /* NEL -- Next line */
2507 tnewline(1); /* always go to first col */
2508 term.esc = 0;
2509 break;
2510 case 'H': /* HTS -- Horizontal tab stop */
2511 term.tabs[term.c.x] = 1;
2512 term.esc = 0;
2513 break;
2514 case 'M': /* RI -- Reverse index */
2515 if(term.c.y == term.top) {
2516 tscrolldown(term.top, 1);
2517 } else {
2518 tmoveto(term.c.x, term.c.y-1);
2519 }
2520 term.esc = 0;
2521 break;
2522 case 'Z': /* DECID -- Identify Terminal */
2523 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2524 term.esc = 0;
2525 break;
2526 case 'c': /* RIS -- Reset to inital state */
2527 treset();
2528 term.esc = 0;
2529 xresettitle();
2530 xloadcols();
2531 break;
2532 case '=': /* DECPAM -- Application keypad */
2533 term.mode |= MODE_APPKEYPAD;
2534 term.esc = 0;
2535 break;
2536 case '>': /* DECPNM -- Normal keypad */
2537 term.mode &= ~MODE_APPKEYPAD;
2538 term.esc = 0;
2539 break;
2540 case '7': /* DECSC -- Save Cursor */
2541 tcursor(CURSOR_SAVE);
2542 term.esc = 0;
2543 break;
2544 case '8': /* DECRC -- Restore Cursor */
2545 tcursor(CURSOR_LOAD);
2546 term.esc = 0;
2547 break;
2548 case '\\': /* ST -- Stop */
2549 term.esc = 0;
2550 break;
2551 default:
2552 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2553 (uchar) ascii, isprint(ascii)? ascii:'.');
2554 term.esc = 0;
2555 }
2556 }
2557 /*
2558 * All characters which form part of a sequence are not
2559 * printed
2560 */
2561 return;
2562 }
2563 /*
2564 * Display control codes only if we are in graphic mode
2565 */
2566 if(control && !(term.c.attr.mode & ATTR_GFX))
2567 return;
2568 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2569 selclear(NULL);
2570 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2571 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2572 tnewline(1);
2573 }
2574
2575 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2576 memmove(&term.line[term.c.y][term.c.x+1],
2577 &term.line[term.c.y][term.c.x],
2578 (term.col - term.c.x - 1) * sizeof(Glyph));
2579 }
2580
2581 if(term.c.x+width > term.col)
2582 tnewline(1);
2583
2584 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2585
2586 if(width == 2) {
2587 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2588 if(term.c.x+1 < term.col) {
2589 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2590 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2591 }
2592 }
2593 if(term.c.x+width < term.col) {
2594 tmoveto(term.c.x+width, term.c.y);
2595 } else {
2596 term.c.state |= CURSOR_WRAPNEXT;
2597 }
2598 }
2599
2600 int
2601 tresize(int col, int row) {
2602 int i;
2603 int minrow = MIN(row, term.row);
2604 int mincol = MIN(col, term.col);
2605 int slide = term.c.y - row + 1;
2606 bool *bp;
2607 Line *orig;
2608
2609 if(col < 1 || row < 1)
2610 return 0;
2611
2612 /* free unneeded rows */
2613 i = 0;
2614 if(slide > 0) {
2615 /*
2616 * slide screen to keep cursor where we expect it -
2617 * tscrollup would work here, but we can optimize to
2618 * memmove because we're freeing the earlier lines
2619 */
2620 for(/* i = 0 */; i < slide; i++) {
2621 free(term.line[i]);
2622 free(term.alt[i]);
2623 }
2624 memmove(term.line, term.line + slide, row * sizeof(Line));
2625 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2626 }
2627 for(i += row; i < term.row; i++) {
2628 free(term.line[i]);
2629 free(term.alt[i]);
2630 }
2631
2632 /* resize to new height */
2633 term.line = xrealloc(term.line, row * sizeof(Line));
2634 term.alt = xrealloc(term.alt, row * sizeof(Line));
2635 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2636 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2637
2638 /* resize each row to new width, zero-pad if needed */
2639 for(i = 0; i < minrow; i++) {
2640 term.dirty[i] = 1;
2641 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2642 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2643 }
2644
2645 /* allocate any new rows */
2646 for(/* i == minrow */; i < row; i++) {
2647 term.dirty[i] = 1;
2648 term.line[i] = xmalloc(col * sizeof(Glyph));
2649 term.alt[i] = xmalloc(col * sizeof(Glyph));
2650 }
2651 if(col > term.col) {
2652 bp = term.tabs + term.col;
2653
2654 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2655 while(--bp > term.tabs && !*bp)
2656 /* nothing */ ;
2657 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2658 *bp = 1;
2659 }
2660 /* update terminal size */
2661 term.col = col;
2662 term.row = row;
2663 /* reset scrolling region */
2664 tsetscroll(0, row-1);
2665 /* make use of the LIMIT in tmoveto */
2666 tmoveto(term.c.x, term.c.y);
2667 /* Clearing both screens */
2668 orig = term.line;
2669 do {
2670 if(mincol < col && 0 < minrow) {
2671 tclearregion(mincol, 0, col - 1, minrow - 1);
2672 }
2673 if(0 < col && minrow < row) {
2674 tclearregion(0, minrow, col - 1, row - 1);
2675 }
2676 tswapscreen();
2677 } while(orig != term.line);
2678
2679 return (slide > 0);
2680 }
2681
2682 void
2683 xresize(int col, int row) {
2684 xw.tw = MAX(1, col * xw.cw);
2685 xw.th = MAX(1, row * xw.ch);
2686
2687 XFreePixmap(xw.dpy, xw.buf);
2688 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2689 DefaultDepth(xw.dpy, xw.scr));
2690 XftDrawChange(xw.draw, xw.buf);
2691 xclear(0, 0, xw.w, xw.h);
2692 }
2693
2694 static inline ushort
2695 sixd_to_16bit(int x) {
2696 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2697 }
2698
2699 void
2700 xloadcols(void) {
2701 int i, r, g, b;
2702 XRenderColor color = { .alpha = 0xffff };
2703 static bool loaded;
2704 Colour *cp;
2705
2706 if(loaded) {
2707 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2708 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2709 }
2710
2711 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2712 for(i = 0; i < LEN(colorname); i++) {
2713 if(!colorname[i])
2714 continue;
2715 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2716 die("Could not allocate color '%s'\n", colorname[i]);
2717 }
2718 }
2719
2720 /* load colors [16-255] ; same colors as xterm */
2721 for(i = 16, r = 0; r < 6; r++) {
2722 for(g = 0; g < 6; g++) {
2723 for(b = 0; b < 6; b++) {
2724 color.red = sixd_to_16bit(r);
2725 color.green = sixd_to_16bit(g);
2726 color.blue = sixd_to_16bit(b);
2727 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2728 die("Could not allocate color %d\n", i);
2729 }
2730 i++;
2731 }
2732 }
2733 }
2734
2735 for(r = 0; r < 24; r++, i++) {
2736 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2737 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2738 &dc.col[i])) {
2739 die("Could not allocate color %d\n", i);
2740 }
2741 }
2742 loaded = true;
2743 }
2744
2745 int
2746 xsetcolorname(int x, const char *name) {
2747 XRenderColor color = { .alpha = 0xffff };
2748 Colour colour;
2749 if (x < 0 || x > LEN(colorname))
2750 return -1;
2751 if(!name) {
2752 if(16 <= x && x < 16 + 216) {
2753 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2754 color.red = sixd_to_16bit(r);
2755 color.green = sixd_to_16bit(g);
2756 color.blue = sixd_to_16bit(b);
2757 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2758 return 0; /* something went wrong */
2759 dc.col[x] = colour;
2760 return 1;
2761 } else if (16 + 216 <= x && x < 256) {
2762 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2763 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2764 return 0; /* something went wrong */
2765 dc.col[x] = colour;
2766 return 1;
2767 } else {
2768 name = colorname[x];
2769 }
2770 }
2771 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2772 return 0;
2773 dc.col[x] = colour;
2774 return 1;
2775 }
2776
2777 void
2778 xtermclear(int col1, int row1, int col2, int row2) {
2779 XftDrawRect(xw.draw,
2780 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2781 borderpx + col1 * xw.cw,
2782 borderpx + row1 * xw.ch,
2783 (col2-col1+1) * xw.cw,
2784 (row2-row1+1) * xw.ch);
2785 }
2786
2787 /*
2788 * Absolute coordinates.
2789 */
2790 void
2791 xclear(int x1, int y1, int x2, int y2) {
2792 XftDrawRect(xw.draw,
2793 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2794 x1, y1, x2-x1, y2-y1);
2795 }
2796
2797 void
2798 xhints(void) {
2799 XClassHint class = {opt_class ? opt_class : termname, termname};
2800 XWMHints wm = {.flags = InputHint, .input = 1};
2801 XSizeHints *sizeh = NULL;
2802
2803 sizeh = XAllocSizeHints();
2804 if(xw.isfixed == False) {
2805 sizeh->flags = PSize | PResizeInc | PBaseSize;
2806 sizeh->height = xw.h;
2807 sizeh->width = xw.w;
2808 sizeh->height_inc = xw.ch;
2809 sizeh->width_inc = xw.cw;
2810 sizeh->base_height = 2 * borderpx;
2811 sizeh->base_width = 2 * borderpx;
2812 } else {
2813 sizeh->flags = PMaxSize | PMinSize;
2814 sizeh->min_width = sizeh->max_width = xw.fw;
2815 sizeh->min_height = sizeh->max_height = xw.fh;
2816 }
2817
2818 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2819 XFree(sizeh);
2820 }
2821
2822 int
2823 xloadfont(Font *f, FcPattern *pattern) {
2824 FcPattern *match;
2825 FcResult result;
2826
2827 match = FcFontMatch(NULL, pattern, &result);
2828 if(!match)
2829 return 1;
2830
2831 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2832 FcPatternDestroy(match);
2833 return 1;
2834 }
2835
2836 f->set = NULL;
2837 f->pattern = FcPatternDuplicate(pattern);
2838
2839 f->ascent = f->match->ascent;
2840 f->descent = f->match->descent;
2841 f->lbearing = 0;
2842 f->rbearing = f->match->max_advance_width;
2843
2844 f->height = f->ascent + f->descent;
2845 f->width = f->lbearing + f->rbearing;
2846
2847 return 0;
2848 }
2849
2850 void
2851 xloadfonts(char *fontstr, double fontsize) {
2852 FcPattern *pattern;
2853 FcResult r_sz, r_psz;
2854 double fontval;
2855
2856 if(fontstr[0] == '-') {
2857 pattern = XftXlfdParse(fontstr, False, False);
2858 } else {
2859 pattern = FcNameParse((FcChar8 *)fontstr);
2860 }
2861
2862 if(!pattern)
2863 die("st: can't open font %s\n", fontstr);
2864
2865 if(fontsize > 0) {
2866 FcPatternDel(pattern, FC_PIXEL_SIZE);
2867 FcPatternDel(pattern, FC_SIZE);
2868 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2869 usedfontsize = fontsize;
2870 } else {
2871 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2872 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2873 if(r_psz == FcResultMatch) {
2874 usedfontsize = fontval;
2875 } else if(r_sz == FcResultMatch) {
2876 usedfontsize = -1;
2877 } else {
2878 /*
2879 * Default font size is 12, if none given. This is to
2880 * have a known usedfontsize value.
2881 */
2882 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2883 usedfontsize = 12;
2884 }
2885 }
2886
2887 FcConfigSubstitute(0, pattern, FcMatchPattern);
2888 FcDefaultSubstitute(pattern);
2889
2890 if(xloadfont(&dc.font, pattern))
2891 die("st: can't open font %s\n", fontstr);
2892
2893 if(usedfontsize < 0) {
2894 FcPatternGetDouble(dc.font.match->pattern,
2895 FC_PIXEL_SIZE, 0, &fontval);
2896 usedfontsize = fontval;
2897 }
2898
2899 /* Setting character width and height. */
2900 xw.cw = CEIL(dc.font.width * cwscale);
2901 xw.ch = CEIL(dc.font.height * chscale);
2902
2903 FcPatternDel(pattern, FC_SLANT);
2904 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2905 if(xloadfont(&dc.ifont, pattern))
2906 die("st: can't open font %s\n", fontstr);
2907
2908 FcPatternDel(pattern, FC_WEIGHT);
2909 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2910 if(xloadfont(&dc.ibfont, pattern))
2911 die("st: can't open font %s\n", fontstr);
2912
2913 FcPatternDel(pattern, FC_SLANT);
2914 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2915 if(xloadfont(&dc.bfont, pattern))
2916 die("st: can't open font %s\n", fontstr);
2917
2918 FcPatternDestroy(pattern);
2919 }
2920
2921 int
2922 xloadfontset(Font *f) {
2923 FcResult result;
2924
2925 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2926 return 1;
2927 return 0;
2928 }
2929
2930 void
2931 xunloadfont(Font *f) {
2932 XftFontClose(xw.dpy, f->match);
2933 FcPatternDestroy(f->pattern);
2934 if(f->set)
2935 FcFontSetDestroy(f->set);
2936 }
2937
2938 void
2939 xunloadfonts(void) {
2940 int i;
2941
2942 /* Free the loaded fonts in the font cache. */
2943 for(i = 0; i < frclen; i++) {
2944 XftFontClose(xw.dpy, frc[i].font);
2945 }
2946 frclen = 0;
2947
2948 xunloadfont(&dc.font);
2949 xunloadfont(&dc.bfont);
2950 xunloadfont(&dc.ifont);
2951 xunloadfont(&dc.ibfont);
2952 }
2953
2954 void
2955 xzoom(const Arg *arg) {
2956 xunloadfonts();
2957 xloadfonts(usedfont, usedfontsize + arg->i);
2958 cresize(0, 0);
2959 redraw(0);
2960 }
2961
2962 void
2963 xinit(void) {
2964 XGCValues gcvalues;
2965 Cursor cursor;
2966 Window parent;
2967 int sw, sh;
2968 pid_t thispid = getpid();
2969
2970 if(!(xw.dpy = XOpenDisplay(NULL)))
2971 die("Can't open display\n");
2972 xw.scr = XDefaultScreen(xw.dpy);
2973 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2974
2975 /* font */
2976 if(!FcInit())
2977 die("Could not init fontconfig.\n");
2978
2979 usedfont = (opt_font == NULL)? font : opt_font;
2980 xloadfonts(usedfont, 0);
2981
2982 /* colors */
2983 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2984 xloadcols();
2985
2986 /* adjust fixed window geometry */
2987 if(xw.isfixed) {
2988 sw = DisplayWidth(xw.dpy, xw.scr);
2989 sh = DisplayHeight(xw.dpy, xw.scr);
2990 if(xw.fx < 0)
2991 xw.fx = sw + xw.fx - xw.fw - 1;
2992 if(xw.fy < 0)
2993 xw.fy = sh + xw.fy - xw.fh - 1;
2994
2995 xw.h = xw.fh;
2996 xw.w = xw.fw;
2997 } else {
2998 /* window - default size */
2999 xw.h = 2 * borderpx + term.row * xw.ch;
3000 xw.w = 2 * borderpx + term.col * xw.cw;
3001 xw.fx = 0;
3002 xw.fy = 0;
3003 }
3004
3005 /* Events */
3006 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3007 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3008 xw.attrs.bit_gravity = NorthWestGravity;
3009 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3010 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3011 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3012 xw.attrs.colormap = xw.cmap;
3013
3014 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3015 XRootWindow(xw.dpy, xw.scr);
3016 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
3017 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3018 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3019 | CWEventMask | CWColormap, &xw.attrs);
3020
3021 memset(&gcvalues, 0, sizeof(gcvalues));
3022 gcvalues.graphics_exposures = False;
3023 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3024 &gcvalues);
3025 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3026 DefaultDepth(xw.dpy, xw.scr));
3027 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3028 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3029
3030 /* Xft rendering context */
3031 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3032
3033 /* input methods */
3034 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3035 XSetLocaleModifiers("@im=local");
3036 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3037 XSetLocaleModifiers("@im=");
3038 if((xw.xim = XOpenIM(xw.dpy,
3039 NULL, NULL, NULL)) == NULL) {
3040 die("XOpenIM failed. Could not open input"
3041 " device.\n");
3042 }
3043 }
3044 }
3045 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3046 | XIMStatusNothing, XNClientWindow, xw.win,
3047 XNFocusWindow, xw.win, NULL);
3048 if(xw.xic == NULL)
3049 die("XCreateIC failed. Could not obtain input method.\n");
3050
3051 /* white cursor, black outline */
3052 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3053 XDefineCursor(xw.dpy, xw.win, cursor);
3054 XRecolorCursor(xw.dpy, cursor,
3055 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3056 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3057
3058 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3059 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3060 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3061 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3062
3063 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3064 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3065 PropModeReplace, (unsigned char *)&thispid, 1);
3066
3067 xresettitle();
3068 XMapWindow(xw.dpy, xw.win);
3069 xhints();
3070 XSync(xw.dpy, 0);
3071 }
3072
3073 void
3074 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3075 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3076 width = charlen * xw.cw, xp, i;
3077 int frcflags;
3078 int u8fl, u8fblen, u8cblen, doesexist;
3079 char *u8c, *u8fs;
3080 long u8char;
3081 Font *font = &dc.font;
3082 FcResult fcres;
3083 FcPattern *fcpattern, *fontpattern;
3084 FcFontSet *fcsets[] = { NULL };
3085 FcCharSet *fccharset;
3086 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3087 XRenderColor colfg, colbg;
3088 Rectangle r;
3089 int oneatatime;
3090
3091 frcflags = FRC_NORMAL;
3092
3093 if(base.mode & ATTR_ITALIC) {
3094 if(base.fg == defaultfg)
3095 base.fg = defaultitalic;
3096 font = &dc.ifont;
3097 frcflags = FRC_ITALIC;
3098 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3099 if(base.fg == defaultfg)
3100 base.fg = defaultitalic;
3101 font = &dc.ibfont;
3102 frcflags = FRC_ITALICBOLD;
3103 } else if(base.mode & ATTR_UNDERLINE) {
3104 if(base.fg == defaultfg)
3105 base.fg = defaultunderline;
3106 }
3107 if(IS_TRUECOL(base.fg)) {
3108 colfg.alpha = 0xffff;
3109 colfg.red = TRUERED(base.fg);
3110 colfg.green = TRUEGREEN(base.fg);
3111 colfg.blue = TRUEBLUE(base.fg);
3112 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3113 fg = &truefg;
3114 } else {
3115 fg = &dc.col[base.fg];
3116 }
3117
3118 if(IS_TRUECOL(base.bg)) {
3119 colbg.alpha = 0xffff;
3120 colbg.green = TRUEGREEN(base.bg);
3121 colbg.red = TRUERED(base.bg);
3122 colbg.blue = TRUEBLUE(base.bg);
3123 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3124 bg = &truebg;
3125 } else {
3126 bg = &dc.col[base.bg];
3127 }
3128
3129
3130
3131 if(base.mode & ATTR_BOLD) {
3132 if(BETWEEN(base.fg, 0, 7)) {
3133 /* basic system colors */
3134 fg = &dc.col[base.fg + 8];
3135 } else if(BETWEEN(base.fg, 16, 195)) {
3136 /* 256 colors */
3137 fg = &dc.col[base.fg + 36];
3138 } else if(BETWEEN(base.fg, 232, 251)) {
3139 /* greyscale */
3140 fg = &dc.col[base.fg + 4];
3141 }
3142 /*
3143 * Those ranges will not be brightened:
3144 * 8 - 15 – bright system colors
3145 * 196 - 231 – highest 256 color cube
3146 * 252 - 255 – brightest colors in greyscale
3147 */
3148 font = &dc.bfont;
3149 frcflags = FRC_BOLD;
3150 }
3151
3152 if(IS_SET(MODE_REVERSE)) {
3153 if(fg == &dc.col[defaultfg]) {
3154 fg = &dc.col[defaultbg];
3155 } else {
3156 colfg.red = ~fg->color.red;
3157 colfg.green = ~fg->color.green;
3158 colfg.blue = ~fg->color.blue;
3159 colfg.alpha = fg->color.alpha;
3160 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3161 fg = &revfg;
3162 }
3163
3164 if(bg == &dc.col[defaultbg]) {
3165 bg = &dc.col[defaultfg];
3166 } else {
3167 colbg.red = ~bg->color.red;
3168 colbg.green = ~bg->color.green;
3169 colbg.blue = ~bg->color.blue;
3170 colbg.alpha = bg->color.alpha;
3171 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
3172 bg = &revbg;
3173 }
3174 }
3175
3176 if(base.mode & ATTR_REVERSE) {
3177 temp = fg;
3178 fg = bg;
3179 bg = temp;
3180 }
3181
3182 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3183 fg = bg;
3184
3185 /* Intelligent cleaning up of the borders. */
3186 if(x == 0) {
3187 xclear(0, (y == 0)? 0 : winy, borderpx,
3188 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3189 }
3190 if(x + charlen >= term.col) {
3191 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3192 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3193 }
3194 if(y == 0)
3195 xclear(winx, 0, winx + width, borderpx);
3196 if(y == term.row-1)
3197 xclear(winx, winy + xw.ch, winx + width, xw.h);
3198
3199 /* Clean up the region we want to draw to. */
3200 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3201
3202 /* Set the clip region because Xft is sometimes dirty. */
3203 r.x = 0;
3204 r.y = 0;
3205 r.height = xw.ch;
3206 r.width = width;
3207 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3208
3209 for(xp = winx; bytelen > 0;) {
3210 /*
3211 * Search for the range in the to be printed string of glyphs
3212 * that are in the main font. Then print that range. If
3213 * some glyph is found that is not in the font, do the
3214 * fallback dance.
3215 */
3216 u8fs = s;
3217 u8fblen = 0;
3218 u8fl = 0;
3219 oneatatime = font->width != xw.cw;
3220 for(;;) {
3221 u8c = s;
3222 u8cblen = utf8decode(s, &u8char);
3223 s += u8cblen;
3224 bytelen -= u8cblen;
3225
3226 doesexist = XftCharExists(xw.dpy, font->match, u8char);
3227 if(oneatatime || !doesexist || bytelen <= 0) {
3228 if(oneatatime || bytelen <= 0) {
3229 if(doesexist) {
3230 u8fl++;
3231 u8fblen += u8cblen;
3232 }
3233 }
3234
3235 if(u8fl > 0) {
3236 XftDrawStringUtf8(xw.draw, fg,
3237 font->match, xp,
3238 winy + font->ascent,
3239 (FcChar8 *)u8fs,
3240 u8fblen);
3241 xp += xw.cw * u8fl;
3242
3243 }
3244 break;
3245 }
3246
3247 u8fl++;
3248 u8fblen += u8cblen;
3249 }
3250 if(doesexist) {
3251 if (oneatatime)
3252 continue;
3253 break;
3254 }
3255
3256 /* Search the font cache. */
3257 for(i = 0; i < frclen; i++) {
3258 if(XftCharExists(xw.dpy, frc[i].font, u8char)
3259 && frc[i].flags == frcflags) {
3260 break;
3261 }
3262 }
3263
3264 /* Nothing was found. */
3265 if(i >= frclen) {
3266 if(!font->set)
3267 xloadfontset(font);
3268 fcsets[0] = font->set;
3269
3270 /*
3271 * Nothing was found in the cache. Now use
3272 * some dozen of Fontconfig calls to get the
3273 * font for one single character.
3274 */
3275 fcpattern = FcPatternDuplicate(font->pattern);
3276 fccharset = FcCharSetCreate();
3277
3278 FcCharSetAddChar(fccharset, u8char);
3279 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3280 fccharset);
3281 FcPatternAddBool(fcpattern, FC_SCALABLE,
3282 FcTrue);
3283
3284 FcConfigSubstitute(0, fcpattern,
3285 FcMatchPattern);
3286 FcDefaultSubstitute(fcpattern);
3287
3288 fontpattern = FcFontSetMatch(0, fcsets,
3289 FcTrue, fcpattern, &fcres);
3290
3291 /*
3292 * Overwrite or create the new cache entry.
3293 */
3294 if(frclen >= LEN(frc)) {
3295 frclen = LEN(frc) - 1;
3296 XftFontClose(xw.dpy, frc[frclen].font);
3297 }
3298
3299 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3300 fontpattern);
3301 frc[frclen].flags = frcflags;
3302
3303 i = frclen;
3304 frclen++;
3305
3306 FcPatternDestroy(fcpattern);
3307 FcCharSetDestroy(fccharset);
3308 }
3309
3310 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3311 xp, winy + frc[i].font->ascent,
3312 (FcChar8 *)u8c, u8cblen);
3313
3314 xp += xw.cw * wcwidth(u8char);
3315 }
3316
3317 /*
3318 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3319 winy + font->ascent, (FcChar8 *)s, bytelen);
3320 */
3321
3322 if(base.mode & ATTR_UNDERLINE) {
3323 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3324 width, 1);
3325 }
3326
3327 /* Reset clip to none. */
3328 XftDrawSetClip(xw.draw, 0);
3329 }
3330
3331 void
3332 xdrawcursor(void) {
3333 static int oldx = 0, oldy = 0;
3334 int sl, width, curx;
3335 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3336
3337 LIMIT(oldx, 0, term.col-1);
3338 LIMIT(oldy, 0, term.row-1);
3339
3340 curx = term.c.x;
3341
3342 /* adjust position if in dummy */
3343 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3344 oldx--;
3345 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3346 curx--;
3347
3348 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3349
3350 /* remove the old cursor */
3351 sl = utf8size(term.line[oldy][oldx].c);
3352 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3353 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3354 oldy, width, sl);
3355
3356 /* draw the new one */
3357 if(!(IS_SET(MODE_HIDE))) {
3358 if(xw.state & WIN_FOCUSED) {
3359 if(IS_SET(MODE_REVERSE)) {
3360 g.mode |= ATTR_REVERSE;
3361 g.fg = defaultcs;
3362 g.bg = defaultfg;
3363 }
3364
3365 sl = utf8size(g.c);
3366 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3367 ? 2 : 1;
3368 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3369 } else {
3370 XftDrawRect(xw.draw, &dc.col[defaultcs],
3371 borderpx + curx * xw.cw,
3372 borderpx + term.c.y * xw.ch,
3373 xw.cw - 1, 1);
3374 XftDrawRect(xw.draw, &dc.col[defaultcs],
3375 borderpx + curx * xw.cw,
3376 borderpx + term.c.y * xw.ch,
3377 1, xw.ch - 1);
3378 XftDrawRect(xw.draw, &dc.col[defaultcs],
3379 borderpx + (curx + 1) * xw.cw - 1,
3380 borderpx + term.c.y * xw.ch,
3381 1, xw.ch - 1);
3382 XftDrawRect(xw.draw, &dc.col[defaultcs],
3383 borderpx + curx * xw.cw,
3384 borderpx + (term.c.y + 1) * xw.ch - 1,
3385 xw.cw, 1);
3386 }
3387 oldx = curx, oldy = term.c.y;
3388 }
3389 }
3390
3391
3392 void
3393 xsettitle(char *p) {
3394 XTextProperty prop;
3395
3396 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3397 &prop);
3398 XSetWMName(xw.dpy, xw.win, &prop);
3399 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3400 XFree(prop.value);
3401 }
3402
3403 void
3404 xresettitle(void) {
3405 xsettitle(opt_title ? opt_title : "st");
3406 }
3407
3408 void
3409 redraw(int timeout) {
3410 struct timespec tv = {0, timeout * 1000};
3411
3412 tfulldirt();
3413 draw();
3414
3415 if(timeout > 0) {
3416 nanosleep(&tv, NULL);
3417 XSync(xw.dpy, False); /* necessary for a good tput flash */
3418 }
3419 }
3420
3421 void
3422 draw(void) {
3423 drawregion(0, 0, term.col, term.row);
3424 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3425 xw.h, 0, 0);
3426 XSetForeground(xw.dpy, dc.gc,
3427 dc.col[IS_SET(MODE_REVERSE)?
3428 defaultfg : defaultbg].pixel);
3429 }
3430
3431 void
3432 drawregion(int x1, int y1, int x2, int y2) {
3433 int ic, ib, x, y, ox, sl;
3434 Glyph base, new;
3435 char buf[DRAW_BUF_SIZ];
3436 bool ena_sel = sel.ob.x != -1;
3437 long u8char;
3438
3439 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3440 ena_sel = 0;
3441
3442 if(!(xw.state & WIN_VISIBLE))
3443 return;
3444
3445 for(y = y1; y < y2; y++) {
3446 if(!term.dirty[y])
3447 continue;
3448
3449 xtermclear(0, y, term.col, y);
3450 term.dirty[y] = 0;
3451 base = term.line[y][0];
3452 ic = ib = ox = 0;
3453 for(x = x1; x < x2; x++) {
3454 new = term.line[y][x];
3455 if(new.mode == ATTR_WDUMMY)
3456 continue;
3457 if(ena_sel && selected(x, y))
3458 new.mode ^= ATTR_REVERSE;
3459 if(ib > 0 && (ATTRCMP(base, new)
3460 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3461 xdraws(buf, base, ox, y, ic, ib);
3462 ic = ib = 0;
3463 }
3464 if(ib == 0) {
3465 ox = x;
3466 base = new;
3467 }
3468
3469 sl = utf8decode(new.c, &u8char);
3470 memcpy(buf+ib, new.c, sl);
3471 ib += sl;
3472 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3473 }
3474 if(ib > 0)
3475 xdraws(buf, base, ox, y, ic, ib);
3476 }
3477 xdrawcursor();
3478 }
3479
3480 void
3481 expose(XEvent *ev) {
3482 XExposeEvent *e = &ev->xexpose;
3483
3484 if(xw.state & WIN_REDRAW) {
3485 if(!e->count)
3486 xw.state &= ~WIN_REDRAW;
3487 }
3488 redraw(0);
3489 }
3490
3491 void
3492 visibility(XEvent *ev) {
3493 XVisibilityEvent *e = &ev->xvisibility;
3494
3495 if(e->state == VisibilityFullyObscured) {
3496 xw.state &= ~WIN_VISIBLE;
3497 } else if(!(xw.state & WIN_VISIBLE)) {
3498 /* need a full redraw for next Expose, not just a buf copy */
3499 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3500 }
3501 }
3502
3503 void
3504 unmap(XEvent *ev) {
3505 xw.state &= ~WIN_VISIBLE;
3506 }
3507
3508 void
3509 xsetpointermotion(int set) {
3510 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3511 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3512 }
3513
3514 void
3515 xseturgency(int add) {
3516 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3517
3518 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3519 XSetWMHints(xw.dpy, xw.win, h);
3520 XFree(h);
3521 }
3522
3523 void
3524 focus(XEvent *ev) {
3525 XFocusChangeEvent *e = &ev->xfocus;
3526
3527 if(e->mode == NotifyGrab)
3528 return;
3529
3530 if(ev->type == FocusIn) {
3531 XSetICFocus(xw.xic);
3532 xw.state |= WIN_FOCUSED;
3533 xseturgency(0);
3534 if(IS_SET(MODE_FOCUS))
3535 ttywrite("\033[I", 3);
3536 } else {
3537 XUnsetICFocus(xw.xic);
3538 xw.state &= ~WIN_FOCUSED;
3539 if(IS_SET(MODE_FOCUS))
3540 ttywrite("\033[O", 3);
3541 }
3542 }
3543
3544 static inline bool
3545 match(uint mask, uint state) {
3546 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3547 }
3548
3549 void
3550 numlock(const Arg *dummy) {
3551 term.numlock ^= 1;
3552 }
3553
3554 char*
3555 kmap(KeySym k, uint state) {
3556 Key *kp;
3557 int i;
3558
3559 /* Check for mapped keys out of X11 function keys. */
3560 for(i = 0; i < LEN(mappedkeys); i++) {
3561 if(mappedkeys[i] == k)
3562 break;
3563 }
3564 if(i == LEN(mappedkeys)) {
3565 if((k & 0xFFFF) < 0xFD00)
3566 return NULL;
3567 }
3568
3569 for(kp = key; kp < key + LEN(key); kp++) {
3570 if(kp->k != k)
3571 continue;
3572
3573 if(!match(kp->mask, state))
3574 continue;
3575
3576 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3577 continue;
3578 if(term.numlock && kp->appkey == 2)
3579 continue;
3580
3581 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3582 continue;
3583
3584 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3585 continue;
3586
3587 return kp->s;
3588 }
3589
3590 return NULL;
3591 }
3592
3593 void
3594 kpress(XEvent *ev) {
3595 XKeyEvent *e = &ev->xkey;
3596 KeySym ksym;
3597 char buf[32], *customkey;
3598 int len;
3599 long c;
3600 Status status;
3601 Shortcut *bp;
3602
3603 if(IS_SET(MODE_KBDLOCK))
3604 return;
3605
3606 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3607 /* 1. shortcuts */
3608 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3609 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3610 bp->func(&(bp->arg));
3611 return;
3612 }
3613 }
3614
3615 /* 2. custom keys from config.h */
3616 if((customkey = kmap(ksym, e->state))) {
3617 ttysend(customkey, strlen(customkey));
3618 return;
3619 }
3620
3621 /* 3. composed string from input method */
3622 if(len == 0)
3623 return;
3624 if(len == 1 && e->state & Mod1Mask) {
3625 if(IS_SET(MODE_8BIT)) {
3626 if(*buf < 0177) {
3627 c = *buf | 0x80;
3628 len = utf8encode(&c, buf);
3629 }
3630 } else {
3631 buf[1] = buf[0];
3632 buf[0] = '\033';
3633 len = 2;
3634 }
3635 }
3636 ttysend(buf, len);
3637 }
3638
3639
3640 void
3641 cmessage(XEvent *e) {
3642 /*
3643 * See xembed specs
3644 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3645 */
3646 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3647 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3648 xw.state |= WIN_FOCUSED;
3649 xseturgency(0);
3650 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3651 xw.state &= ~WIN_FOCUSED;
3652 }
3653 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3654 /* Send SIGHUP to shell */
3655 kill(pid, SIGHUP);
3656 exit(EXIT_SUCCESS);
3657 }
3658 }
3659
3660 void
3661 cresize(int width, int height) {
3662 int col, row;
3663
3664 if(width != 0)
3665 xw.w = width;
3666 if(height != 0)
3667 xw.h = height;
3668
3669 col = (xw.w - 2 * borderpx) / xw.cw;
3670 row = (xw.h - 2 * borderpx) / xw.ch;
3671
3672 tresize(col, row);
3673 xresize(col, row);
3674 ttyresize();
3675 }
3676
3677 void
3678 resize(XEvent *e) {
3679 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3680 return;
3681
3682 cresize(e->xconfigure.width, e->xconfigure.height);
3683 }
3684
3685 void
3686 run(void) {
3687 XEvent ev;
3688 int w = xw.w, h = xw.h;
3689 fd_set rfd;
3690 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3691 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3692
3693 /* Waiting for window mapping */
3694 while(1) {
3695 XNextEvent(xw.dpy, &ev);
3696 if(ev.type == ConfigureNotify) {
3697 w = ev.xconfigure.width;
3698 h = ev.xconfigure.height;
3699 } else if(ev.type == MapNotify) {
3700 break;
3701 }
3702 }
3703
3704 ttynew();
3705 if(!xw.isfixed)
3706 cresize(w, h);
3707 else
3708 cresize(xw.fw, xw.fh);
3709
3710 gettimeofday(&lastblink, NULL);
3711 gettimeofday(&last, NULL);
3712
3713 for(xev = actionfps;;) {
3714 long deltatime;
3715
3716 FD_ZERO(&rfd);
3717 FD_SET(cmdfd, &rfd);
3718 FD_SET(xfd, &rfd);
3719
3720 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3721 if(errno == EINTR)
3722 continue;
3723 die("select failed: %s\n", SERRNO);
3724 }
3725 if(FD_ISSET(cmdfd, &rfd)) {
3726 ttyread();
3727 if(blinktimeout) {
3728 blinkset = tattrset(ATTR_BLINK);
3729 if(!blinkset)
3730 MODBIT(term.mode, 0, MODE_BLINK);
3731 }
3732 }
3733
3734 if(FD_ISSET(xfd, &rfd))
3735 xev = actionfps;
3736
3737 gettimeofday(&now, NULL);
3738 drawtimeout.tv_sec = 0;
3739 drawtimeout.tv_usec = (1000/xfps) * 1000;
3740 tv = &drawtimeout;
3741
3742 dodraw = 0;
3743 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3744 tsetdirtattr(ATTR_BLINK);
3745 term.mode ^= MODE_BLINK;
3746 gettimeofday(&lastblink, NULL);
3747 dodraw = 1;
3748 }
3749 deltatime = TIMEDIFF(now, last);
3750 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3751 || deltatime < 0) {
3752 dodraw = 1;
3753 last = now;
3754 }
3755
3756 if(dodraw) {
3757 while(XPending(xw.dpy)) {
3758 XNextEvent(xw.dpy, &ev);
3759 if(XFilterEvent(&ev, None))
3760 continue;
3761 if(handler[ev.type])
3762 (handler[ev.type])(&ev);
3763 }
3764
3765 draw();
3766 XFlush(xw.dpy);
3767
3768 if(xev && !FD_ISSET(xfd, &rfd))
3769 xev--;
3770 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3771 if(blinkset) {
3772 if(TIMEDIFF(now, lastblink) \
3773 > blinktimeout) {
3774 drawtimeout.tv_usec = 1;
3775 } else {
3776 drawtimeout.tv_usec = (1000 * \
3777 (blinktimeout - \
3778 TIMEDIFF(now,
3779 lastblink)));
3780 }
3781 } else {
3782 tv = NULL;
3783 }
3784 }
3785 }
3786 }
3787 }
3788
3789 void
3790 usage(void) {
3791 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3792 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3793 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3794 }
3795
3796 int
3797 main(int argc, char *argv[]) {
3798 int bitm, xr, yr;
3799 uint wr, hr;
3800 char *titles;
3801
3802 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3803 xw.isfixed = False;
3804
3805 ARGBEGIN {
3806 case 'a':
3807 allowaltscreen = false;
3808 break;
3809 case 'c':
3810 opt_class = EARGF(usage());
3811 break;
3812 case 'e':
3813 /* eat all remaining arguments */
3814 if(argc > 1) {
3815 opt_cmd = &argv[1];
3816 if(argv[1] != NULL && opt_title == NULL) {
3817 titles = xstrdup(argv[1]);
3818 opt_title = basename(titles);
3819 }
3820 }
3821 goto run;
3822 case 'f':
3823 opt_font = EARGF(usage());
3824 break;
3825 case 'g':
3826 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3827 if(bitm & XValue)
3828 xw.fx = xr;
3829 if(bitm & YValue)
3830 xw.fy = yr;
3831 if(bitm & WidthValue)
3832 xw.fw = (int)wr;
3833 if(bitm & HeightValue)
3834 xw.fh = (int)hr;
3835 if(bitm & XNegative && xw.fx == 0)
3836 xw.fx = -1;
3837 if(bitm & YNegative && xw.fy == 0)
3838 xw.fy = -1;
3839
3840 if(xw.fh != 0 && xw.fw != 0)
3841 xw.isfixed = True;
3842 break;
3843 case 'o':
3844 opt_io = EARGF(usage());
3845 break;
3846 case 't':
3847 opt_title = EARGF(usage());
3848 break;
3849 case 'w':
3850 opt_embed = EARGF(usage());
3851 break;
3852 case 'v':
3853 default:
3854 usage();
3855 } ARGEND;
3856
3857 run:
3858 setlocale(LC_CTYPE, "");
3859 XSetLocaleModifiers("");
3860 tnew(80, 24);
3861 xinit();
3862 selinit();
3863 run();
3864
3865 return 0;
3866 }
3867
simple terminal