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Add error message when child exits whit error
[st.git] / st.c
blob45bc89d179e561ab7ecc317f08cdd8a33caad122
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
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a)[0])
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f))
74 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
75 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
80 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
81
82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
83 #define IS_TRUECOL(x) (1 << 24 & (x))
84 #define TRUERED(x) (((x) & 0xff0000) >> 8)
85 #define TRUEGREEN(x) (((x) & 0xff00))
86 #define TRUEBLUE(x) (((x) & 0xff) << 8)
87
88
89 #define VT102ID "\033[?6c"
90
91 enum glyph_attribute {
92 ATTR_NULL = 0,
93 ATTR_BOLD = 1,
94 ATTR_FAINT = 2,
95 ATTR_ITALIC = 4,
96 ATTR_UNDERLINE = 8,
97 ATTR_BLINK = 16,
98 ATTR_REVERSE = 32,
99 ATTR_INVISIBLE = 64,
100 ATTR_STRUCK = 128,
101 ATTR_WRAP = 256,
102 ATTR_WIDE = 512,
103 ATTR_WDUMMY = 1024,
104 };
105
106 enum cursor_movement {
107 CURSOR_SAVE,
108 CURSOR_LOAD
109 };
110
111 enum cursor_state {
112 CURSOR_DEFAULT = 0,
113 CURSOR_WRAPNEXT = 1,
114 CURSOR_ORIGIN = 2
115 };
116
117 enum term_mode {
118 MODE_WRAP = 1,
119 MODE_INSERT = 2,
120 MODE_APPKEYPAD = 4,
121 MODE_ALTSCREEN = 8,
122 MODE_CRLF = 16,
123 MODE_MOUSEBTN = 32,
124 MODE_MOUSEMOTION = 64,
125 MODE_REVERSE = 128,
126 MODE_KBDLOCK = 256,
127 MODE_HIDE = 512,
128 MODE_ECHO = 1024,
129 MODE_APPCURSOR = 2048,
130 MODE_MOUSESGR = 4096,
131 MODE_8BIT = 8192,
132 MODE_BLINK = 16384,
133 MODE_FBLINK = 32768,
134 MODE_FOCUS = 65536,
135 MODE_MOUSEX10 = 131072,
136 MODE_MOUSEMANY = 262144,
137 MODE_BRCKTPASTE = 524288,
138 MODE_PRINT = 1048576,
139 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
140 |MODE_MOUSEMANY,
141 };
142
143 enum charset {
144 CS_GRAPHIC0,
145 CS_GRAPHIC1,
146 CS_UK,
147 CS_USA,
148 CS_MULTI,
149 CS_GER,
150 CS_FIN
151 };
152
153 enum escape_state {
154 ESC_START = 1,
155 ESC_CSI = 2,
156 ESC_STR = 4, /* DCS, OSC, PM, APC */
157 ESC_ALTCHARSET = 8,
158 ESC_STR_END = 16, /* a final string was encountered */
159 ESC_TEST = 32, /* Enter in test mode */
160 };
161
162 enum window_state {
163 WIN_VISIBLE = 1,
164 WIN_REDRAW = 2,
165 WIN_FOCUSED = 4
166 };
167
168 enum selection_type {
169 SEL_REGULAR = 1,
170 SEL_RECTANGULAR = 2
171 };
172
173 enum selection_snap {
174 SNAP_WORD = 1,
175 SNAP_LINE = 2
176 };
177
178 typedef unsigned char uchar;
179 typedef unsigned int uint;
180 typedef unsigned long ulong;
181 typedef unsigned short ushort;
182
183 typedef XftDraw *Draw;
184 typedef XftColor Color;
185
186 typedef struct {
187 char c[UTF_SIZ]; /* character code */
188 ushort mode; /* attribute flags */
189 uint32_t fg; /* foreground */
190 uint32_t bg; /* background */
191 } Glyph;
192
193 typedef Glyph *Line;
194
195 typedef struct {
196 Glyph attr; /* current char attributes */
197 int x;
198 int y;
199 char state;
200 } TCursor;
201
202 /* CSI Escape sequence structs */
203 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
204 typedef struct {
205 char buf[ESC_BUF_SIZ]; /* raw string */
206 int len; /* raw string length */
207 char priv;
208 int arg[ESC_ARG_SIZ];
209 int narg; /* nb of args */
210 char mode;
211 } CSIEscape;
212
213 /* STR Escape sequence structs */
214 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
215 typedef struct {
216 char type; /* ESC type ... */
217 char buf[STR_BUF_SIZ]; /* raw string */
218 int len; /* raw string length */
219 char *args[STR_ARG_SIZ];
220 int narg; /* nb of args */
221 } STREscape;
222
223 /* Internal representation of the screen */
224 typedef struct {
225 int row; /* nb row */
226 int col; /* nb col */
227 Line *line; /* screen */
228 Line *alt; /* alternate screen */
229 bool *dirty; /* dirtyness of lines */
230 TCursor c; /* cursor */
231 int top; /* top scroll limit */
232 int bot; /* bottom scroll limit */
233 int mode; /* terminal mode flags */
234 int esc; /* escape state flags */
235 char trantbl[4]; /* charset table translation */
236 int charset; /* current charset */
237 int icharset; /* selected charset for sequence */
238 bool numlock; /* lock numbers in keyboard */
239 bool *tabs;
240 } Term;
241
242 /* Purely graphic info */
243 typedef struct {
244 Display *dpy;
245 Colormap cmap;
246 Window win;
247 Drawable buf;
248 Atom xembed, wmdeletewin, netwmname, netwmpid;
249 XIM xim;
250 XIC xic;
251 Draw draw;
252 Visual *vis;
253 XSetWindowAttributes attrs;
254 int scr;
255 bool isfixed; /* is fixed geometry? */
256 int l, t; /* left and top offset */
257 int gm; /* geometry mask */
258 int tw, th; /* tty width and height */
259 int w, h; /* window width and height */
260 int ch; /* char height */
261 int cw; /* char width */
262 char state; /* focus, redraw, visible */
263 } XWindow;
264
265 typedef struct {
266 uint b;
267 uint mask;
268 char *s;
269 } Mousekey;
270
271 typedef struct {
272 KeySym k;
273 uint mask;
274 char *s;
275 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
276 signed char appkey; /* application keypad */
277 signed char appcursor; /* application cursor */
278 signed char crlf; /* crlf mode */
279 } Key;
280
281 typedef struct {
282 int mode;
283 int type;
284 int snap;
285 /*
286 * Selection variables:
287 * nb – normalized coordinates of the beginning of the selection
288 * ne – normalized coordinates of the end of the selection
289 * ob – original coordinates of the beginning of the selection
290 * oe – original coordinates of the end of the selection
291 */
292 struct {
293 int x, y;
294 } nb, ne, ob, oe;
295
296 char *clip;
297 Atom xtarget;
298 bool alt;
299 struct timespec tclick1;
300 struct timespec tclick2;
301 } Selection;
302
303 typedef union {
304 int i;
305 uint ui;
306 float f;
307 const void *v;
308 } Arg;
309
310 typedef struct {
311 uint mod;
312 KeySym keysym;
313 void (*func)(const Arg *);
314 const Arg arg;
315 } Shortcut;
316
317 /* function definitions used in config.h */
318 static void clippaste(const Arg *);
319 static void numlock(const Arg *);
320 static void selpaste(const Arg *);
321 static void xzoom(const Arg *);
322 static void printsel(const Arg *);
323 static void printscreen(const Arg *) ;
324 static void toggleprinter(const Arg *);
325
326 /* Config.h for applying patches and the configuration. */
327 #include "config.h"
328
329 /* Font structure */
330 typedef struct {
331 int height;
332 int width;
333 int ascent;
334 int descent;
335 short lbearing;
336 short rbearing;
337 XftFont *match;
338 FcFontSet *set;
339 FcPattern *pattern;
340 } Font;
341
342 /* Drawing Context */
343 typedef struct {
344 Color col[MAX(LEN(colorname), 256)];
345 Font font, bfont, ifont, ibfont;
346 GC gc;
347 } DC;
348
349 static void die(const char *, ...);
350 static void draw(void);
351 static void redraw(int);
352 static void drawregion(int, int, int, int);
353 static void execsh(void);
354 static void sigchld(int);
355 static void run(void);
356
357 static void csidump(void);
358 static void csihandle(void);
359 static void csiparse(void);
360 static void csireset(void);
361 static void strdump(void);
362 static void strhandle(void);
363 static void strparse(void);
364 static void strreset(void);
365
366 static int tattrset(int);
367 static void tprinter(char *, size_t);
368 static void tdumpsel(void);
369 static void tdumpline(int);
370 static void tdump(void);
371 static void tclearregion(int, int, int, int);
372 static void tcursor(int);
373 static void tdeletechar(int);
374 static void tdeleteline(int);
375 static void tinsertblank(int);
376 static void tinsertblankline(int);
377 static int tlinelen(int);
378 static void tmoveto(int, int);
379 static void tmoveato(int, int);
380 static void tnew(int, int);
381 static void tnewline(int);
382 static void tputtab(int);
383 static void tputc(char *, int);
384 static void treset(void);
385 static int tresize(int, int);
386 static void tscrollup(int, int);
387 static void tscrolldown(int, int);
388 static void tsetattr(int *, int);
389 static void tsetchar(char *, Glyph *, int, int);
390 static void tsetscroll(int, int);
391 static void tswapscreen(void);
392 static void tsetdirt(int, int);
393 static void tsetdirtattr(int);
394 static void tsetmode(bool, bool, int *, int);
395 static void tfulldirt(void);
396 static void techo(char *, int);
397 static void tcontrolcode(uchar );
398 static void tdectest(char );
399 static int32_t tdefcolor(int *, int *, int);
400 static void tdeftran(char);
401 static inline bool match(uint, uint);
402 static void ttynew(void);
403 static void ttyread(void);
404 static void ttyresize(void);
405 static void ttysend(char *, size_t);
406 static void ttywrite(const char *, size_t);
407 static void tstrsequence(uchar c);
408
409 static void xdraws(char *, Glyph, int, int, int, int);
410 static void xhints(void);
411 static void xclear(int, int, int, int);
412 static void xdrawcursor(void);
413 static void xinit(void);
414 static void xloadcols(void);
415 static int xsetcolorname(int, const char *);
416 static int xgeommasktogravity(int);
417 static int xloadfont(Font *, FcPattern *);
418 static void xloadfonts(char *, double);
419 static int xloadfontset(Font *);
420 static void xsettitle(char *);
421 static void xresettitle(void);
422 static void xsetpointermotion(int);
423 static void xseturgency(int);
424 static void xsetsel(char *);
425 static void xtermclear(int, int, int, int);
426 static void xunloadfont(Font *);
427 static void xunloadfonts(void);
428 static void xresize(int, int);
429
430 static void expose(XEvent *);
431 static void visibility(XEvent *);
432 static void unmap(XEvent *);
433 static char *kmap(KeySym, uint);
434 static void kpress(XEvent *);
435 static void cmessage(XEvent *);
436 static void cresize(int, int);
437 static void resize(XEvent *);
438 static void focus(XEvent *);
439 static void brelease(XEvent *);
440 static void bpress(XEvent *);
441 static void bmotion(XEvent *);
442 static void selnotify(XEvent *);
443 static void selclear(XEvent *);
444 static void selrequest(XEvent *);
445
446 static void selinit(void);
447 static void selnormalize(void);
448 static inline bool selected(int, int);
449 static char *getsel(void);
450 static void selcopy(void);
451 static void selscroll(int, int);
452 static void selsnap(int, int *, int *, int);
453 static void getbuttoninfo(XEvent *);
454 static void mousereport(XEvent *);
455
456 static size_t utf8decode(char *, long *, size_t);
457 static long utf8decodebyte(char, size_t *);
458 static size_t utf8encode(long, char *, size_t);
459 static char utf8encodebyte(long, size_t);
460 static size_t utf8len(char *);
461 static size_t utf8validate(long *, size_t);
462
463 static ssize_t xwrite(int, const char *, size_t);
464 static void *xmalloc(size_t);
465 static void *xrealloc(void *, size_t);
466 static char *xstrdup(char *);
467
468 static void usage(void);
469
470 static void (*handler[LASTEvent])(XEvent *) = {
471 [KeyPress] = kpress,
472 [ClientMessage] = cmessage,
473 [ConfigureNotify] = resize,
474 [VisibilityNotify] = visibility,
475 [UnmapNotify] = unmap,
476 [Expose] = expose,
477 [FocusIn] = focus,
478 [FocusOut] = focus,
479 [MotionNotify] = bmotion,
480 [ButtonPress] = bpress,
481 [ButtonRelease] = brelease,
482 [SelectionClear] = selclear,
483 [SelectionNotify] = selnotify,
484 [SelectionRequest] = selrequest,
485 };
486
487 /* Globals */
488 static DC dc;
489 static XWindow xw;
490 static Term term;
491 static CSIEscape csiescseq;
492 static STREscape strescseq;
493 static int cmdfd;
494 static pid_t pid;
495 static Selection sel;
496 static int iofd = STDOUT_FILENO;
497 static char **opt_cmd = NULL;
498 static char *opt_io = NULL;
499 static char *opt_title = NULL;
500 static char *opt_embed = NULL;
501 static char *opt_class = NULL;
502 static char *opt_font = NULL;
503 static int oldbutton = 3; /* button event on startup: 3 = release */
504
505 static char *usedfont = NULL;
506 static double usedfontsize = 0;
507
508 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
509 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
510 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
511 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
512
513 /* Font Ring Cache */
514 enum {
515 FRC_NORMAL,
516 FRC_ITALIC,
517 FRC_BOLD,
518 FRC_ITALICBOLD
519 };
520
521 typedef struct {
522 XftFont *font;
523 int flags;
524 } Fontcache;
525
526 /* Fontcache is an array now. A new font will be appended to the array. */
527 static Fontcache frc[16];
528 static int frclen = 0;
529
530 ssize_t
531 xwrite(int fd, const char *s, size_t len) {
532 size_t aux = len;
533
534 while(len > 0) {
535 ssize_t r = write(fd, s, len);
536 if(r < 0)
537 return r;
538 len -= r;
539 s += r;
540 }
541 return aux;
542 }
543
544 void *
545 xmalloc(size_t len) {
546 void *p = malloc(len);
547
548 if(!p)
549 die("Out of memory\n");
550
551 return p;
552 }
553
554 void *
555 xrealloc(void *p, size_t len) {
556 if((p = realloc(p, len)) == NULL)
557 die("Out of memory\n");
558
559 return p;
560 }
561
562 char *
563 xstrdup(char *s) {
564 if((s = strdup(s)) == NULL)
565 die("Out of memory\n");
566
567 return s;
568 }
569
570 size_t
571 utf8decode(char *c, long *u, size_t clen) {
572 size_t i, j, len, type;
573 long udecoded;
574
575 *u = UTF_INVALID;
576 if(!clen)
577 return 0;
578 udecoded = utf8decodebyte(c[0], &len);
579 if(!BETWEEN(len, 1, UTF_SIZ))
580 return 1;
581 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
582 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
583 if(type != 0)
584 return j;
585 }
586 if(j < len)
587 return 0;
588 *u = udecoded;
589 utf8validate(u, len);
590 return len;
591 }
592
593 long
594 utf8decodebyte(char c, size_t *i) {
595 for(*i = 0; *i < LEN(utfmask); ++(*i))
596 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
597 return (uchar)c & ~utfmask[*i];
598 return 0;
599 }
600
601 size_t
602 utf8encode(long u, char *c, size_t clen) {
603 size_t len, i;
604
605 len = utf8validate(&u, 0);
606 if(clen < len)
607 return 0;
608 for(i = len - 1; i != 0; --i) {
609 c[i] = utf8encodebyte(u, 0);
610 u >>= 6;
611 }
612 c[0] = utf8encodebyte(u, len);
613 return len;
614 }
615
616 char
617 utf8encodebyte(long u, size_t i) {
618 return utfbyte[i] | (u & ~utfmask[i]);
619 }
620
621 size_t
622 utf8len(char *c) {
623 return utf8decode(c, &(long){0}, UTF_SIZ);
624 }
625
626 size_t
627 utf8validate(long *u, size_t i) {
628 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
629 *u = UTF_INVALID;
630 for(i = 1; *u > utfmax[i]; ++i)
631 ;
632 return i;
633 }
634
635 static void
636 selinit(void) {
637 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
638 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
639 sel.mode = 0;
640 sel.ob.x = -1;
641 sel.clip = NULL;
642 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
643 if(sel.xtarget == None)
644 sel.xtarget = XA_STRING;
645 }
646
647 static int
648 x2col(int x) {
649 x -= borderpx;
650 x /= xw.cw;
651
652 return LIMIT(x, 0, term.col-1);
653 }
654
655 static int
656 y2row(int y) {
657 y -= borderpx;
658 y /= xw.ch;
659
660 return LIMIT(y, 0, term.row-1);
661 }
662
663 static int tlinelen(int y) {
664 int i = term.col;
665
666 while (i > 0 && term.line[y][i - 1].c[0] == ' ')
667 --i;
668
669 return i;
670 }
671
672 static void
673 selnormalize(void) {
674 int i;
675
676 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
677 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
678 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
679 } else {
680 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
681 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
682 }
683 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
684 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
685
686 /* expand selection over line breaks */
687 if (sel.type == SEL_RECTANGULAR)
688 return;
689 i = tlinelen(sel.nb.y);
690 if (i < sel.nb.x)
691 sel.nb.x = i;
692 if (tlinelen(sel.ne.y) <= sel.ne.x)
693 sel.ne.x = term.col - 1;
694 }
695
696 static inline bool
697 selected(int x, int y) {
698 if(sel.type == SEL_RECTANGULAR)
699 return BETWEEN(y, sel.nb.y, sel.ne.y)
700 && BETWEEN(x, sel.nb.x, sel.ne.x);
701
702 return BETWEEN(y, sel.nb.y, sel.ne.y)
703 && (y != sel.nb.y || x >= sel.nb.x)
704 && (y != sel.ne.y || x <= sel.ne.x);
705 }
706
707 void
708 selsnap(int mode, int *x, int *y, int direction) {
709 int newx, newy, xt, yt;
710 Glyph *gp;
711
712 switch(mode) {
713 case SNAP_WORD:
714 /*
715 * Snap around if the word wraps around at the end or
716 * beginning of a line.
717 */
718 for(;;) {
719 newx = *x + direction;
720 newy = *y;
721 if(!BETWEEN(newx, 0, term.col - 1)) {
722 newy += direction;
723 newx = (newx + term.col) % term.col;
724 if (!BETWEEN(newy, 0, term.row - 1))
725 break;
726
727 if(direction > 0)
728 yt = *y, xt = *x;
729 else
730 yt = newy, xt = newx;
731 if(!(term.line[yt][xt].mode & ATTR_WRAP))
732 break;
733 }
734
735 if (newx >= tlinelen(newy))
736 break;
737
738 gp = &term.line[newy][newx];
739 if (!(gp->mode & ATTR_WDUMMY) && strchr(worddelimiters, gp->c[0]))
740 break;
741
742 *x = newx;
743 *y = newy;
744 }
745 break;
746 case SNAP_LINE:
747 /*
748 * Snap around if the the previous line or the current one
749 * has set ATTR_WRAP at its end. Then the whole next or
750 * previous line will be selected.
751 */
752 *x = (direction < 0) ? 0 : term.col - 1;
753 if(direction < 0 && *y > 0) {
754 for(; *y > 0; *y += direction) {
755 if(!(term.line[*y-1][term.col-1].mode
756 & ATTR_WRAP)) {
757 break;
758 }
759 }
760 } else if(direction > 0 && *y < term.row-1) {
761 for(; *y < term.row; *y += direction) {
762 if(!(term.line[*y][term.col-1].mode
763 & ATTR_WRAP)) {
764 break;
765 }
766 }
767 }
768 break;
769 }
770 }
771
772 void
773 getbuttoninfo(XEvent *e) {
774 int type;
775 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
776
777 sel.alt = IS_SET(MODE_ALTSCREEN);
778
779 sel.oe.x = x2col(e->xbutton.x);
780 sel.oe.y = y2row(e->xbutton.y);
781
782 if(sel.ob.y < sel.oe.y
783 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
784 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
785 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
786 } else {
787 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
788 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
789 }
790 selnormalize();
791
792 sel.type = SEL_REGULAR;
793 for(type = 1; type < LEN(selmasks); ++type) {
794 if(match(selmasks[type], state)) {
795 sel.type = type;
796 break;
797 }
798 }
799 }
800
801 void
802 mousereport(XEvent *e) {
803 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
804 button = e->xbutton.button, state = e->xbutton.state,
805 len;
806 char buf[40];
807 static int ox, oy;
808
809 /* from urxvt */
810 if(e->xbutton.type == MotionNotify) {
811 if(x == ox && y == oy)
812 return;
813 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
814 return;
815 /* MOUSE_MOTION: no reporting if no button is pressed */
816 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
817 return;
818
819 button = oldbutton + 32;
820 ox = x;
821 oy = y;
822 } else {
823 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
824 button = 3;
825 } else {
826 button -= Button1;
827 if(button >= 3)
828 button += 64 - 3;
829 }
830 if(e->xbutton.type == ButtonPress) {
831 oldbutton = button;
832 ox = x;
833 oy = y;
834 } else if(e->xbutton.type == ButtonRelease) {
835 oldbutton = 3;
836 /* MODE_MOUSEX10: no button release reporting */
837 if(IS_SET(MODE_MOUSEX10))
838 return;
839 if (button == 64 || button == 65)
840 return;
841 }
842 }
843
844 if(!IS_SET(MODE_MOUSEX10)) {
845 button += (state & ShiftMask ? 4 : 0)
846 + (state & Mod4Mask ? 8 : 0)
847 + (state & ControlMask ? 16 : 0);
848 }
849
850 len = 0;
851 if(IS_SET(MODE_MOUSESGR)) {
852 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
853 button, x+1, y+1,
854 e->xbutton.type == ButtonRelease ? 'm' : 'M');
855 } else if(x < 223 && y < 223) {
856 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
857 32+button, 32+x+1, 32+y+1);
858 } else {
859 return;
860 }
861
862 ttywrite(buf, len);
863 }
864
865 void
866 bpress(XEvent *e) {
867 struct timespec now;
868 Mousekey *mk;
869
870 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
871 mousereport(e);
872 return;
873 }
874
875 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
876 if(e->xbutton.button == mk->b
877 && match(mk->mask, e->xbutton.state)) {
878 ttysend(mk->s, strlen(mk->s));
879 return;
880 }
881 }
882
883 if(e->xbutton.button == Button1) {
884 clock_gettime(CLOCK_MONOTONIC, &now);
885
886 /* Clear previous selection, logically and visually. */
887 selclear(NULL);
888 sel.mode = 1;
889 sel.type = SEL_REGULAR;
890 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
891 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
892
893 /*
894 * If the user clicks below predefined timeouts specific
895 * snapping behaviour is exposed.
896 */
897 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
898 sel.snap = SNAP_LINE;
899 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
900 sel.snap = SNAP_WORD;
901 } else {
902 sel.snap = 0;
903 }
904 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
905 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
906 selnormalize();
907
908 /*
909 * Draw selection, unless it's regular and we don't want to
910 * make clicks visible
911 */
912 if(sel.snap != 0) {
913 sel.mode++;
914 tsetdirt(sel.nb.y, sel.ne.y);
915 }
916 sel.tclick2 = sel.tclick1;
917 sel.tclick1 = now;
918 }
919 }
920
921 char *
922 getsel(void) {
923 char *str, *ptr;
924 int y, bufsize, size, lastx, linelen;
925 Glyph *gp, *last;
926
927 if(sel.ob.x == -1)
928 return NULL;
929
930 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
931 ptr = str = xmalloc(bufsize);
932
933 /* append every set & selected glyph to the selection */
934 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
935 linelen = tlinelen(y);
936
937 if(sel.type == SEL_RECTANGULAR) {
938 gp = &term.line[y][sel.nb.x];
939 lastx = sel.ne.x;
940 } else {
941 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
942 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
943 }
944 last = &term.line[y][MIN(lastx, linelen-1)];
945
946 for( ; gp <= last; ++gp) {
947 if(gp->mode & ATTR_WDUMMY)
948 continue;
949
950 size = utf8len(gp->c);
951 memcpy(ptr, gp->c, size);
952 ptr += size;
953 }
954
955 /*
956 * Copy and pasting of line endings is inconsistent
957 * in the inconsistent terminal and GUI world.
958 * The best solution seems like to produce '\n' when
959 * something is copied from st and convert '\n' to
960 * '\r', when something to be pasted is received by
961 * st.
962 * FIXME: Fix the computer world.
963 */
964 if(sel.ne.y > y || lastx >= linelen)
965 *ptr++ = '\n';
966 }
967 *ptr = 0;
968 return str;
969 }
970
971 void
972 selcopy(void) {
973 xsetsel(getsel());
974 }
975
976 void
977 selnotify(XEvent *e) {
978 ulong nitems, ofs, rem;
979 int format;
980 uchar *data, *last, *repl;
981 Atom type;
982
983 ofs = 0;
984 do {
985 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
986 False, AnyPropertyType, &type, &format,
987 &nitems, &rem, &data)) {
988 fprintf(stderr, "Clipboard allocation failed\n");
989 return;
990 }
991
992 /*
993 * As seen in getsel:
994 * Line endings are inconsistent in the terminal and GUI world
995 * copy and pasting. When receiving some selection data,
996 * replace all '\n' with '\r'.
997 * FIXME: Fix the computer world.
998 */
999 repl = data;
1000 last = data + nitems * format / 8;
1001 while((repl = memchr(repl, '\n', last - repl))) {
1002 *repl++ = '\r';
1003 }
1004
1005 if(IS_SET(MODE_BRCKTPASTE))
1006 ttywrite("\033[200~", 6);
1007 ttysend((char *)data, nitems * format / 8);
1008 if(IS_SET(MODE_BRCKTPASTE))
1009 ttywrite("\033[201~", 6);
1010 XFree(data);
1011 /* number of 32-bit chunks returned */
1012 ofs += nitems * format / 32;
1013 } while(rem > 0);
1014 }
1015
1016 void
1017 selpaste(const Arg *dummy) {
1018 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1019 xw.win, CurrentTime);
1020 }
1021
1022 void
1023 clippaste(const Arg *dummy) {
1024 Atom clipboard;
1025
1026 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1027 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1028 xw.win, CurrentTime);
1029 }
1030
1031 void
1032 selclear(XEvent *e) {
1033 if(sel.ob.x == -1)
1034 return;
1035 sel.ob.x = -1;
1036 tsetdirt(sel.nb.y, sel.ne.y);
1037 }
1038
1039 void
1040 selrequest(XEvent *e) {
1041 XSelectionRequestEvent *xsre;
1042 XSelectionEvent xev;
1043 Atom xa_targets, string;
1044
1045 xsre = (XSelectionRequestEvent *) e;
1046 xev.type = SelectionNotify;
1047 xev.requestor = xsre->requestor;
1048 xev.selection = xsre->selection;
1049 xev.target = xsre->target;
1050 xev.time = xsre->time;
1051 /* reject */
1052 xev.property = None;
1053
1054 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1055 if(xsre->target == xa_targets) {
1056 /* respond with the supported type */
1057 string = sel.xtarget;
1058 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1059 XA_ATOM, 32, PropModeReplace,
1060 (uchar *) &string, 1);
1061 xev.property = xsre->property;
1062 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1063 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1064 xsre->target, 8, PropModeReplace,
1065 (uchar *) sel.clip, strlen(sel.clip));
1066 xev.property = xsre->property;
1067 }
1068
1069 /* all done, send a notification to the listener */
1070 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1071 fprintf(stderr, "Error sending SelectionNotify event\n");
1072 }
1073
1074 void
1075 xsetsel(char *str) {
1076 /* register the selection for both the clipboard and the primary */
1077 Atom clipboard;
1078
1079 free(sel.clip);
1080 sel.clip = str;
1081
1082 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1083
1084 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1085 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1086 }
1087
1088 void
1089 brelease(XEvent *e) {
1090 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1091 mousereport(e);
1092 return;
1093 }
1094
1095 if(e->xbutton.button == Button2) {
1096 selpaste(NULL);
1097 } else if(e->xbutton.button == Button1) {
1098 if(sel.mode < 2) {
1099 selclear(NULL);
1100 } else {
1101 getbuttoninfo(e);
1102 selcopy();
1103 }
1104 sel.mode = 0;
1105 tsetdirt(sel.nb.y, sel.ne.y);
1106 }
1107 }
1108
1109 void
1110 bmotion(XEvent *e) {
1111 int oldey, oldex, oldsby, oldsey;
1112
1113 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1114 mousereport(e);
1115 return;
1116 }
1117
1118 if(!sel.mode)
1119 return;
1120
1121 sel.mode++;
1122 oldey = sel.oe.y;
1123 oldex = sel.oe.x;
1124 oldsby = sel.nb.y;
1125 oldsey = sel.ne.y;
1126 getbuttoninfo(e);
1127
1128 if(oldey != sel.oe.y || oldex != sel.oe.x)
1129 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1130 }
1131
1132 void
1133 die(const char *errstr, ...) {
1134 va_list ap;
1135
1136 va_start(ap, errstr);
1137 vfprintf(stderr, errstr, ap);
1138 va_end(ap);
1139 exit(EXIT_FAILURE);
1140 }
1141
1142 void
1143 execsh(void) {
1144 char **args;
1145 char *envshell = getenv("SHELL");
1146 const struct passwd *pass = getpwuid(getuid());
1147 char buf[sizeof(long) * 8 + 1];
1148
1149 unsetenv("COLUMNS");
1150 unsetenv("LINES");
1151 unsetenv("TERMCAP");
1152
1153 if(pass) {
1154 setenv("LOGNAME", pass->pw_name, 1);
1155 setenv("USER", pass->pw_name, 1);
1156 setenv("SHELL", pass->pw_shell, 0);
1157 setenv("HOME", pass->pw_dir, 0);
1158 }
1159
1160 snprintf(buf, sizeof(buf), "%lu", xw.win);
1161 setenv("WINDOWID", buf, 1);
1162
1163 signal(SIGCHLD, SIG_DFL);
1164 signal(SIGHUP, SIG_DFL);
1165 signal(SIGINT, SIG_DFL);
1166 signal(SIGQUIT, SIG_DFL);
1167 signal(SIGTERM, SIG_DFL);
1168 signal(SIGALRM, SIG_DFL);
1169
1170 DEFAULT(envshell, shell);
1171 setenv("TERM", termname, 1);
1172 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1173 execvp(args[0], args);
1174 exit(EXIT_FAILURE);
1175 }
1176
1177 void
1178 sigchld(int a) {
1179 int stat, ret;
1180
1181 if(waitpid(pid, &stat, 0) < 0)
1182 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1183
1184 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1185 if (ret != EXIT_SUCCESS)
1186 die("child finished with error '%d'\n", stat);
1187 exit(EXIT_SUCCESS);
1188 }
1189
1190 void
1191 ttynew(void) {
1192 int m, s;
1193 struct winsize w = {term.row, term.col, 0, 0};
1194
1195 /* seems to work fine on linux, openbsd and freebsd */
1196 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1197 die("openpty failed: %s\n", strerror(errno));
1198
1199 switch(pid = fork()) {
1200 case -1:
1201 die("fork failed\n");
1202 break;
1203 case 0:
1204 setsid(); /* create a new process group */
1205 dup2(s, STDIN_FILENO);
1206 dup2(s, STDOUT_FILENO);
1207 dup2(s, STDERR_FILENO);
1208 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1209 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1210 close(s);
1211 close(m);
1212 execsh();
1213 break;
1214 default:
1215 close(s);
1216 cmdfd = m;
1217 signal(SIGCHLD, sigchld);
1218 if(opt_io) {
1219 term.mode |= MODE_PRINT;
1220 iofd = (!strcmp(opt_io, "-")) ?
1221 STDOUT_FILENO :
1222 open(opt_io, O_WRONLY | O_CREAT, 0666);
1223 if(iofd < 0) {
1224 fprintf(stderr, "Error opening %s:%s\n",
1225 opt_io, strerror(errno));
1226 }
1227 }
1228 break;
1229 }
1230 }
1231
1232 void
1233 ttyread(void) {
1234 static char buf[BUFSIZ];
1235 static int buflen = 0;
1236 char *ptr;
1237 char s[UTF_SIZ];
1238 int charsize; /* size of utf8 char in bytes */
1239 long unicodep;
1240 int ret;
1241
1242 /* append read bytes to unprocessed bytes */
1243 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1244 die("Couldn't read from shell: %s\n", strerror(errno));
1245
1246 /* process every complete utf8 char */
1247 buflen += ret;
1248 ptr = buf;
1249 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1250 utf8encode(unicodep, s, UTF_SIZ);
1251 tputc(s, charsize);
1252 ptr += charsize;
1253 buflen -= charsize;
1254 }
1255
1256 /* keep any uncomplete utf8 char for the next call */
1257 memmove(buf, ptr, buflen);
1258 }
1259
1260 void
1261 ttywrite(const char *s, size_t n) {
1262 if(xwrite(cmdfd, s, n) == -1)
1263 die("write error on tty: %s\n", strerror(errno));
1264 }
1265
1266 void
1267 ttysend(char *s, size_t n) {
1268 ttywrite(s, n);
1269 if(IS_SET(MODE_ECHO))
1270 techo(s, n);
1271 }
1272
1273 void
1274 ttyresize(void) {
1275 struct winsize w;
1276
1277 w.ws_row = term.row;
1278 w.ws_col = term.col;
1279 w.ws_xpixel = xw.tw;
1280 w.ws_ypixel = xw.th;
1281 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1282 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1283 }
1284
1285 int
1286 tattrset(int attr) {
1287 int i, j;
1288
1289 for(i = 0; i < term.row-1; i++) {
1290 for(j = 0; j < term.col-1; j++) {
1291 if(term.line[i][j].mode & attr)
1292 return 1;
1293 }
1294 }
1295
1296 return 0;
1297 }
1298
1299 void
1300 tsetdirt(int top, int bot) {
1301 int i;
1302
1303 LIMIT(top, 0, term.row-1);
1304 LIMIT(bot, 0, term.row-1);
1305
1306 for(i = top; i <= bot; i++)
1307 term.dirty[i] = 1;
1308 }
1309
1310 void
1311 tsetdirtattr(int attr) {
1312 int i, j;
1313
1314 for(i = 0; i < term.row-1; i++) {
1315 for(j = 0; j < term.col-1; j++) {
1316 if(term.line[i][j].mode & attr) {
1317 tsetdirt(i, i);
1318 break;
1319 }
1320 }
1321 }
1322 }
1323
1324 void
1325 tfulldirt(void) {
1326 tsetdirt(0, term.row-1);
1327 }
1328
1329 void
1330 tcursor(int mode) {
1331 static TCursor c[2];
1332 bool alt = IS_SET(MODE_ALTSCREEN);
1333
1334 if(mode == CURSOR_SAVE) {
1335 c[alt] = term.c;
1336 } else if(mode == CURSOR_LOAD) {
1337 term.c = c[alt];
1338 tmoveto(c[alt].x, c[alt].y);
1339 }
1340 }
1341
1342 void
1343 treset(void) {
1344 uint i;
1345
1346 term.c = (TCursor){{
1347 .mode = ATTR_NULL,
1348 .fg = defaultfg,
1349 .bg = defaultbg
1350 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1351
1352 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1353 for(i = tabspaces; i < term.col; i += tabspaces)
1354 term.tabs[i] = 1;
1355 term.top = 0;
1356 term.bot = term.row - 1;
1357 term.mode = MODE_WRAP;
1358 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1359 term.charset = 0;
1360
1361 tclearregion(0, 0, term.col-1, term.row-1);
1362 tmoveto(0, 0);
1363 tcursor(CURSOR_SAVE);
1364 }
1365
1366 void
1367 tnew(int col, int row) {
1368 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1369 tresize(col, row);
1370 term.numlock = 1;
1371
1372 treset();
1373 }
1374
1375 void
1376 tswapscreen(void) {
1377 Line *tmp = term.line;
1378
1379 term.line = term.alt;
1380 term.alt = tmp;
1381 term.mode ^= MODE_ALTSCREEN;
1382 tfulldirt();
1383 }
1384
1385 void
1386 tscrolldown(int orig, int n) {
1387 int i;
1388 Line temp;
1389
1390 LIMIT(n, 0, term.bot-orig+1);
1391
1392 tsetdirt(orig, term.bot-n);
1393 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1394
1395 for(i = term.bot; i >= orig+n; i--) {
1396 temp = term.line[i];
1397 term.line[i] = term.line[i-n];
1398 term.line[i-n] = temp;
1399 }
1400
1401 selscroll(orig, n);
1402 }
1403
1404 void
1405 tscrollup(int orig, int n) {
1406 int i;
1407 Line temp;
1408
1409 LIMIT(n, 0, term.bot-orig+1);
1410
1411 tclearregion(0, orig, term.col-1, orig+n-1);
1412 tsetdirt(orig+n, term.bot);
1413
1414 for(i = orig; i <= term.bot-n; i++) {
1415 temp = term.line[i];
1416 term.line[i] = term.line[i+n];
1417 term.line[i+n] = temp;
1418 }
1419
1420 selscroll(orig, -n);
1421 }
1422
1423 void
1424 selscroll(int orig, int n) {
1425 if(sel.ob.x == -1)
1426 return;
1427
1428 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1429 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1430 selclear(NULL);
1431 return;
1432 }
1433 if(sel.type == SEL_RECTANGULAR) {
1434 if(sel.ob.y < term.top)
1435 sel.ob.y = term.top;
1436 if(sel.oe.y > term.bot)
1437 sel.oe.y = term.bot;
1438 } else {
1439 if(sel.ob.y < term.top) {
1440 sel.ob.y = term.top;
1441 sel.ob.x = 0;
1442 }
1443 if(sel.oe.y > term.bot) {
1444 sel.oe.y = term.bot;
1445 sel.oe.x = term.col;
1446 }
1447 }
1448 selnormalize();
1449 }
1450 }
1451
1452 void
1453 tnewline(int first_col) {
1454 int y = term.c.y;
1455
1456 if(y == term.bot) {
1457 tscrollup(term.top, 1);
1458 } else {
1459 y++;
1460 }
1461 tmoveto(first_col ? 0 : term.c.x, y);
1462 }
1463
1464 void
1465 csiparse(void) {
1466 char *p = csiescseq.buf, *np;
1467 long int v;
1468
1469 csiescseq.narg = 0;
1470 if(*p == '?') {
1471 csiescseq.priv = 1;
1472 p++;
1473 }
1474
1475 csiescseq.buf[csiescseq.len] = '\0';
1476 while(p < csiescseq.buf+csiescseq.len) {
1477 np = NULL;
1478 v = strtol(p, &np, 10);
1479 if(np == p)
1480 v = 0;
1481 if(v == LONG_MAX || v == LONG_MIN)
1482 v = -1;
1483 csiescseq.arg[csiescseq.narg++] = v;
1484 p = np;
1485 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1486 break;
1487 p++;
1488 }
1489 csiescseq.mode = *p;
1490 }
1491
1492 /* for absolute user moves, when decom is set */
1493 void
1494 tmoveato(int x, int y) {
1495 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1496 }
1497
1498 void
1499 tmoveto(int x, int y) {
1500 int miny, maxy;
1501
1502 if(term.c.state & CURSOR_ORIGIN) {
1503 miny = term.top;
1504 maxy = term.bot;
1505 } else {
1506 miny = 0;
1507 maxy = term.row - 1;
1508 }
1509 LIMIT(x, 0, term.col-1);
1510 LIMIT(y, miny, maxy);
1511 term.c.state &= ~CURSOR_WRAPNEXT;
1512 term.c.x = x;
1513 term.c.y = y;
1514 }
1515
1516 void
1517 tsetchar(char *c, Glyph *attr, int x, int y) {
1518 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1519 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1520 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1521 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1522 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1523 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1524 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1525 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1526 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1527 };
1528
1529 /*
1530 * The table is proudly stolen from rxvt.
1531 */
1532 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1533 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1534 c = vt100_0[c[0] - 0x41];
1535 }
1536 }
1537
1538 if(term.line[y][x].mode & ATTR_WIDE) {
1539 if(x+1 < term.col) {
1540 term.line[y][x+1].c[0] = ' ';
1541 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1542 }
1543 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1544 term.line[y][x-1].c[0] = ' ';
1545 term.line[y][x-1].mode &= ~ATTR_WIDE;
1546 }
1547
1548 term.dirty[y] = 1;
1549 term.line[y][x] = *attr;
1550 memcpy(term.line[y][x].c, c, UTF_SIZ);
1551 }
1552
1553 void
1554 tclearregion(int x1, int y1, int x2, int y2) {
1555 int x, y, temp;
1556
1557 if(x1 > x2)
1558 temp = x1, x1 = x2, x2 = temp;
1559 if(y1 > y2)
1560 temp = y1, y1 = y2, y2 = temp;
1561
1562 LIMIT(x1, 0, term.col-1);
1563 LIMIT(x2, 0, term.col-1);
1564 LIMIT(y1, 0, term.row-1);
1565 LIMIT(y2, 0, term.row-1);
1566
1567 for(y = y1; y <= y2; y++) {
1568 term.dirty[y] = 1;
1569 for(x = x1; x <= x2; x++) {
1570 if(selected(x, y))
1571 selclear(NULL);
1572 term.line[y][x] = term.c.attr;
1573 memcpy(term.line[y][x].c, " ", 2);
1574 }
1575 }
1576 }
1577
1578 void
1579 tdeletechar(int n) {
1580 int dst, src, size;
1581 Glyph *line;
1582
1583 LIMIT(n, 0, term.col - term.c.x);
1584
1585 dst = term.c.x;
1586 src = term.c.x + n;
1587 size = term.col - src;
1588 line = term.line[term.c.y];
1589
1590 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1591 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1592 }
1593
1594 void
1595 tinsertblank(int n) {
1596 int dst, src, size;
1597 Glyph *line;
1598
1599 LIMIT(n, 0, term.col - term.c.x);
1600
1601 dst = term.c.x + n;
1602 src = term.c.x;
1603 size = term.col - dst;
1604 line = term.line[term.c.y];
1605
1606 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1607 tclearregion(src, term.c.y, dst - 1, term.c.y);
1608 }
1609
1610 void
1611 tinsertblankline(int n) {
1612 if(BETWEEN(term.c.y, term.top, term.bot))
1613 tscrolldown(term.c.y, n);
1614 }
1615
1616 void
1617 tdeleteline(int n) {
1618 if(BETWEEN(term.c.y, term.top, term.bot))
1619 tscrollup(term.c.y, n);
1620 }
1621
1622 int32_t
1623 tdefcolor(int *attr, int *npar, int l) {
1624 int32_t idx = -1;
1625 uint r, g, b;
1626
1627 switch (attr[*npar + 1]) {
1628 case 2: /* direct color in RGB space */
1629 if (*npar + 4 >= l) {
1630 fprintf(stderr,
1631 "erresc(38): Incorrect number of parameters (%d)\n",
1632 *npar);
1633 break;
1634 }
1635 r = attr[*npar + 2];
1636 g = attr[*npar + 3];
1637 b = attr[*npar + 4];
1638 *npar += 4;
1639 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1640 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1641 r, g, b);
1642 else
1643 idx = TRUECOLOR(r, g, b);
1644 break;
1645 case 5: /* indexed color */
1646 if (*npar + 2 >= l) {
1647 fprintf(stderr,
1648 "erresc(38): Incorrect number of parameters (%d)\n",
1649 *npar);
1650 break;
1651 }
1652 *npar += 2;
1653 if(!BETWEEN(attr[*npar], 0, 255))
1654 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1655 else
1656 idx = attr[*npar];
1657 break;
1658 case 0: /* implemented defined (only foreground) */
1659 case 1: /* transparent */
1660 case 3: /* direct color in CMY space */
1661 case 4: /* direct color in CMYK space */
1662 default:
1663 fprintf(stderr,
1664 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1665 break;
1666 }
1667
1668 return idx;
1669 }
1670
1671 void
1672 tsetattr(int *attr, int l) {
1673 int i;
1674 int32_t idx;
1675
1676 for(i = 0; i < l; i++) {
1677 switch(attr[i]) {
1678 case 0:
1679 term.c.attr.mode &= ~(
1680 ATTR_BOLD |
1681 ATTR_FAINT |
1682 ATTR_ITALIC |
1683 ATTR_UNDERLINE |
1684 ATTR_BLINK |
1685 ATTR_REVERSE |
1686 ATTR_INVISIBLE |
1687 ATTR_STRUCK );
1688 term.c.attr.fg = defaultfg;
1689 term.c.attr.bg = defaultbg;
1690 break;
1691 case 1:
1692 term.c.attr.mode |= ATTR_BOLD;
1693 break;
1694 case 2:
1695 term.c.attr.mode |= ATTR_FAINT;
1696 break;
1697 case 3:
1698 term.c.attr.mode |= ATTR_ITALIC;
1699 break;
1700 case 4:
1701 term.c.attr.mode |= ATTR_UNDERLINE;
1702 break;
1703 case 5: /* slow blink */
1704 /* FALLTHROUGH */
1705 case 6: /* rapid blink */
1706 term.c.attr.mode |= ATTR_BLINK;
1707 break;
1708 case 7:
1709 term.c.attr.mode |= ATTR_REVERSE;
1710 break;
1711 case 8:
1712 term.c.attr.mode |= ATTR_INVISIBLE;
1713 break;
1714 case 9:
1715 term.c.attr.mode |= ATTR_STRUCK;
1716 break;
1717 case 22:
1718 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1719 break;
1720 case 23:
1721 term.c.attr.mode &= ~ATTR_ITALIC;
1722 break;
1723 case 24:
1724 term.c.attr.mode &= ~ATTR_UNDERLINE;
1725 break;
1726 case 25:
1727 term.c.attr.mode &= ~ATTR_BLINK;
1728 break;
1729 case 27:
1730 term.c.attr.mode &= ~ATTR_REVERSE;
1731 break;
1732 case 28:
1733 term.c.attr.mode &= ~ATTR_INVISIBLE;
1734 break;
1735 case 29:
1736 term.c.attr.mode &= ~ATTR_STRUCK;
1737 break;
1738 case 38:
1739 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1740 term.c.attr.fg = idx;
1741 break;
1742 case 39:
1743 term.c.attr.fg = defaultfg;
1744 break;
1745 case 48:
1746 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1747 term.c.attr.bg = idx;
1748 break;
1749 case 49:
1750 term.c.attr.bg = defaultbg;
1751 break;
1752 default:
1753 if(BETWEEN(attr[i], 30, 37)) {
1754 term.c.attr.fg = attr[i] - 30;
1755 } else if(BETWEEN(attr[i], 40, 47)) {
1756 term.c.attr.bg = attr[i] - 40;
1757 } else if(BETWEEN(attr[i], 90, 97)) {
1758 term.c.attr.fg = attr[i] - 90 + 8;
1759 } else if(BETWEEN(attr[i], 100, 107)) {
1760 term.c.attr.bg = attr[i] - 100 + 8;
1761 } else {
1762 fprintf(stderr,
1763 "erresc(default): gfx attr %d unknown\n",
1764 attr[i]), csidump();
1765 }
1766 break;
1767 }
1768 }
1769 }
1770
1771 void
1772 tsetscroll(int t, int b) {
1773 int temp;
1774
1775 LIMIT(t, 0, term.row-1);
1776 LIMIT(b, 0, term.row-1);
1777 if(t > b) {
1778 temp = t;
1779 t = b;
1780 b = temp;
1781 }
1782 term.top = t;
1783 term.bot = b;
1784 }
1785
1786 void
1787 tsetmode(bool priv, bool set, int *args, int narg) {
1788 int *lim, mode;
1789 bool alt;
1790
1791 for(lim = args + narg; args < lim; ++args) {
1792 if(priv) {
1793 switch(*args) {
1794 case 1: /* DECCKM -- Cursor key */
1795 MODBIT(term.mode, set, MODE_APPCURSOR);
1796 break;
1797 case 5: /* DECSCNM -- Reverse video */
1798 mode = term.mode;
1799 MODBIT(term.mode, set, MODE_REVERSE);
1800 if(mode != term.mode)
1801 redraw(REDRAW_TIMEOUT);
1802 break;
1803 case 6: /* DECOM -- Origin */
1804 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1805 tmoveato(0, 0);
1806 break;
1807 case 7: /* DECAWM -- Auto wrap */
1808 MODBIT(term.mode, set, MODE_WRAP);
1809 break;
1810 case 0: /* Error (IGNORED) */
1811 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1812 case 3: /* DECCOLM -- Column (IGNORED) */
1813 case 4: /* DECSCLM -- Scroll (IGNORED) */
1814 case 8: /* DECARM -- Auto repeat (IGNORED) */
1815 case 18: /* DECPFF -- Printer feed (IGNORED) */
1816 case 19: /* DECPEX -- Printer extent (IGNORED) */
1817 case 42: /* DECNRCM -- National characters (IGNORED) */
1818 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1819 break;
1820 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1821 MODBIT(term.mode, !set, MODE_HIDE);
1822 break;
1823 case 9: /* X10 mouse compatibility mode */
1824 xsetpointermotion(0);
1825 MODBIT(term.mode, 0, MODE_MOUSE);
1826 MODBIT(term.mode, set, MODE_MOUSEX10);
1827 break;
1828 case 1000: /* 1000: report button press */
1829 xsetpointermotion(0);
1830 MODBIT(term.mode, 0, MODE_MOUSE);
1831 MODBIT(term.mode, set, MODE_MOUSEBTN);
1832 break;
1833 case 1002: /* 1002: report motion on button press */
1834 xsetpointermotion(0);
1835 MODBIT(term.mode, 0, MODE_MOUSE);
1836 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1837 break;
1838 case 1003: /* 1003: enable all mouse motions */
1839 xsetpointermotion(set);
1840 MODBIT(term.mode, 0, MODE_MOUSE);
1841 MODBIT(term.mode, set, MODE_MOUSEMANY);
1842 break;
1843 case 1004: /* 1004: send focus events to tty */
1844 MODBIT(term.mode, set, MODE_FOCUS);
1845 break;
1846 case 1006: /* 1006: extended reporting mode */
1847 MODBIT(term.mode, set, MODE_MOUSESGR);
1848 break;
1849 case 1034:
1850 MODBIT(term.mode, set, MODE_8BIT);
1851 break;
1852 case 1049: /* swap screen & set/restore cursor as xterm */
1853 if (!allowaltscreen)
1854 break;
1855 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1856 /* FALLTHROUGH */
1857 case 47: /* swap screen */
1858 case 1047:
1859 if (!allowaltscreen)
1860 break;
1861 alt = IS_SET(MODE_ALTSCREEN);
1862 if(alt) {
1863 tclearregion(0, 0, term.col-1,
1864 term.row-1);
1865 }
1866 if(set ^ alt) /* set is always 1 or 0 */
1867 tswapscreen();
1868 if(*args != 1049)
1869 break;
1870 /* FALLTHROUGH */
1871 case 1048:
1872 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1873 break;
1874 case 2004: /* 2004: bracketed paste mode */
1875 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1876 break;
1877 /* Not implemented mouse modes. See comments there. */
1878 case 1001: /* mouse highlight mode; can hang the
1879 terminal by design when implemented. */
1880 case 1005: /* UTF-8 mouse mode; will confuse
1881 applications not supporting UTF-8
1882 and luit. */
1883 case 1015: /* urxvt mangled mouse mode; incompatible
1884 and can be mistaken for other control
1885 codes. */
1886 default:
1887 fprintf(stderr,
1888 "erresc: unknown private set/reset mode %d\n",
1889 *args);
1890 break;
1891 }
1892 } else {
1893 switch(*args) {
1894 case 0: /* Error (IGNORED) */
1895 break;
1896 case 2: /* KAM -- keyboard action */
1897 MODBIT(term.mode, set, MODE_KBDLOCK);
1898 break;
1899 case 4: /* IRM -- Insertion-replacement */
1900 MODBIT(term.mode, set, MODE_INSERT);
1901 break;
1902 case 12: /* SRM -- Send/Receive */
1903 MODBIT(term.mode, !set, MODE_ECHO);
1904 break;
1905 case 20: /* LNM -- Linefeed/new line */
1906 MODBIT(term.mode, set, MODE_CRLF);
1907 break;
1908 default:
1909 fprintf(stderr,
1910 "erresc: unknown set/reset mode %d\n",
1911 *args);
1912 break;
1913 }
1914 }
1915 }
1916 }
1917
1918 void
1919 csihandle(void) {
1920 char buf[40];
1921 int len;
1922
1923 switch(csiescseq.mode) {
1924 default:
1925 unknown:
1926 fprintf(stderr, "erresc: unknown csi ");
1927 csidump();
1928 /* die(""); */
1929 break;
1930 case '@': /* ICH -- Insert <n> blank char */
1931 DEFAULT(csiescseq.arg[0], 1);
1932 tinsertblank(csiescseq.arg[0]);
1933 break;
1934 case 'A': /* CUU -- Cursor <n> Up */
1935 DEFAULT(csiescseq.arg[0], 1);
1936 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1937 break;
1938 case 'B': /* CUD -- Cursor <n> Down */
1939 case 'e': /* VPR --Cursor <n> Down */
1940 DEFAULT(csiescseq.arg[0], 1);
1941 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1942 break;
1943 case 'i': /* MC -- Media Copy */
1944 switch(csiescseq.arg[0]) {
1945 case 0:
1946 tdump();
1947 break;
1948 case 1:
1949 tdumpline(term.c.y);
1950 break;
1951 case 2:
1952 tdumpsel();
1953 break;
1954 case 4:
1955 term.mode &= ~MODE_PRINT;
1956 break;
1957 case 5:
1958 term.mode |= MODE_PRINT;
1959 break;
1960 }
1961 break;
1962 case 'c': /* DA -- Device Attributes */
1963 if(csiescseq.arg[0] == 0)
1964 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1965 break;
1966 case 'C': /* CUF -- Cursor <n> Forward */
1967 case 'a': /* HPR -- Cursor <n> Forward */
1968 DEFAULT(csiescseq.arg[0], 1);
1969 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1970 break;
1971 case 'D': /* CUB -- Cursor <n> Backward */
1972 DEFAULT(csiescseq.arg[0], 1);
1973 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1974 break;
1975 case 'E': /* CNL -- Cursor <n> Down and first col */
1976 DEFAULT(csiescseq.arg[0], 1);
1977 tmoveto(0, term.c.y+csiescseq.arg[0]);
1978 break;
1979 case 'F': /* CPL -- Cursor <n> Up and first col */
1980 DEFAULT(csiescseq.arg[0], 1);
1981 tmoveto(0, term.c.y-csiescseq.arg[0]);
1982 break;
1983 case 'g': /* TBC -- Tabulation clear */
1984 switch(csiescseq.arg[0]) {
1985 case 0: /* clear current tab stop */
1986 term.tabs[term.c.x] = 0;
1987 break;
1988 case 3: /* clear all the tabs */
1989 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1990 break;
1991 default:
1992 goto unknown;
1993 }
1994 break;
1995 case 'G': /* CHA -- Move to <col> */
1996 case '`': /* HPA */
1997 DEFAULT(csiescseq.arg[0], 1);
1998 tmoveto(csiescseq.arg[0]-1, term.c.y);
1999 break;
2000 case 'H': /* CUP -- Move to <row> <col> */
2001 case 'f': /* HVP */
2002 DEFAULT(csiescseq.arg[0], 1);
2003 DEFAULT(csiescseq.arg[1], 1);
2004 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2005 break;
2006 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2007 DEFAULT(csiescseq.arg[0], 1);
2008 tputtab(csiescseq.arg[0]);
2009 break;
2010 case 'J': /* ED -- Clear screen */
2011 selclear(NULL);
2012 switch(csiescseq.arg[0]) {
2013 case 0: /* below */
2014 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2015 if(term.c.y < term.row-1) {
2016 tclearregion(0, term.c.y+1, term.col-1,
2017 term.row-1);
2018 }
2019 break;
2020 case 1: /* above */
2021 if(term.c.y > 1)
2022 tclearregion(0, 0, term.col-1, term.c.y-1);
2023 tclearregion(0, term.c.y, term.c.x, term.c.y);
2024 break;
2025 case 2: /* all */
2026 tclearregion(0, 0, term.col-1, term.row-1);
2027 break;
2028 default:
2029 goto unknown;
2030 }
2031 break;
2032 case 'K': /* EL -- Clear line */
2033 switch(csiescseq.arg[0]) {
2034 case 0: /* right */
2035 tclearregion(term.c.x, term.c.y, term.col-1,
2036 term.c.y);
2037 break;
2038 case 1: /* left */
2039 tclearregion(0, term.c.y, term.c.x, term.c.y);
2040 break;
2041 case 2: /* all */
2042 tclearregion(0, term.c.y, term.col-1, term.c.y);
2043 break;
2044 }
2045 break;
2046 case 'S': /* SU -- Scroll <n> line up */
2047 DEFAULT(csiescseq.arg[0], 1);
2048 tscrollup(term.top, csiescseq.arg[0]);
2049 break;
2050 case 'T': /* SD -- Scroll <n> line down */
2051 DEFAULT(csiescseq.arg[0], 1);
2052 tscrolldown(term.top, csiescseq.arg[0]);
2053 break;
2054 case 'L': /* IL -- Insert <n> blank lines */
2055 DEFAULT(csiescseq.arg[0], 1);
2056 tinsertblankline(csiescseq.arg[0]);
2057 break;
2058 case 'l': /* RM -- Reset Mode */
2059 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2060 break;
2061 case 'M': /* DL -- Delete <n> lines */
2062 DEFAULT(csiescseq.arg[0], 1);
2063 tdeleteline(csiescseq.arg[0]);
2064 break;
2065 case 'X': /* ECH -- Erase <n> char */
2066 DEFAULT(csiescseq.arg[0], 1);
2067 tclearregion(term.c.x, term.c.y,
2068 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2069 break;
2070 case 'P': /* DCH -- Delete <n> char */
2071 DEFAULT(csiescseq.arg[0], 1);
2072 tdeletechar(csiescseq.arg[0]);
2073 break;
2074 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2075 DEFAULT(csiescseq.arg[0], 1);
2076 tputtab(-csiescseq.arg[0]);
2077 break;
2078 case 'd': /* VPA -- Move to <row> */
2079 DEFAULT(csiescseq.arg[0], 1);
2080 tmoveato(term.c.x, csiescseq.arg[0]-1);
2081 break;
2082 case 'h': /* SM -- Set terminal mode */
2083 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2084 break;
2085 case 'm': /* SGR -- Terminal attribute (color) */
2086 tsetattr(csiescseq.arg, csiescseq.narg);
2087 break;
2088 case 'n': /* DSR – Device Status Report (cursor position) */
2089 if (csiescseq.arg[0] == 6) {
2090 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2091 term.c.y+1, term.c.x+1);
2092 ttywrite(buf, len);
2093 }
2094 break;
2095 case 'r': /* DECSTBM -- Set Scrolling Region */
2096 if(csiescseq.priv) {
2097 goto unknown;
2098 } else {
2099 DEFAULT(csiescseq.arg[0], 1);
2100 DEFAULT(csiescseq.arg[1], term.row);
2101 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2102 tmoveato(0, 0);
2103 }
2104 break;
2105 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2106 tcursor(CURSOR_SAVE);
2107 break;
2108 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2109 tcursor(CURSOR_LOAD);
2110 break;
2111 }
2112 }
2113
2114 void
2115 csidump(void) {
2116 int i;
2117 uint c;
2118
2119 printf("ESC[");
2120 for(i = 0; i < csiescseq.len; i++) {
2121 c = csiescseq.buf[i] & 0xff;
2122 if(isprint(c)) {
2123 putchar(c);
2124 } else if(c == '\n') {
2125 printf("(\\n)");
2126 } else if(c == '\r') {
2127 printf("(\\r)");
2128 } else if(c == 0x1b) {
2129 printf("(\\e)");
2130 } else {
2131 printf("(%02x)", c);
2132 }
2133 }
2134 putchar('\n');
2135 }
2136
2137 void
2138 csireset(void) {
2139 memset(&csiescseq, 0, sizeof(csiescseq));
2140 }
2141
2142 void
2143 strhandle(void) {
2144 char *p = NULL;
2145 int j, narg, par;
2146
2147 term.esc &= ~(ESC_STR_END|ESC_STR);
2148 strparse();
2149 narg = strescseq.narg;
2150 par = atoi(strescseq.args[0]);
2151
2152 switch(strescseq.type) {
2153 case ']': /* OSC -- Operating System Command */
2154 switch(par) {
2155 case 0:
2156 case 1:
2157 case 2:
2158 if(narg > 1)
2159 xsettitle(strescseq.args[1]);
2160 return;
2161 case 4: /* color set */
2162 if(narg < 3)
2163 break;
2164 p = strescseq.args[2];
2165 /* FALLTHROUGH */
2166 case 104: /* color reset, here p = NULL */
2167 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2168 if(xsetcolorname(j, p)) {
2169 fprintf(stderr, "erresc: invalid color %s\n", p);
2170 } else {
2171 /*
2172 * TODO if defaultbg color is changed, borders
2173 * are dirty
2174 */
2175 redraw(0);
2176 }
2177 return;
2178 }
2179 break;
2180 case 'k': /* old title set compatibility */
2181 xsettitle(strescseq.args[0]);
2182 return;
2183 case 'P': /* DCS -- Device Control String */
2184 case '_': /* APC -- Application Program Command */
2185 case '^': /* PM -- Privacy Message */
2186 return;
2187 }
2188
2189 fprintf(stderr, "erresc: unknown str ");
2190 strdump();
2191 }
2192
2193 void
2194 strparse(void) {
2195 char *p = strescseq.buf;
2196
2197 strescseq.narg = 0;
2198 strescseq.buf[strescseq.len] = '\0';
2199 while(p && strescseq.narg < STR_ARG_SIZ)
2200 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2201 }
2202
2203 void
2204 strdump(void) {
2205 int i;
2206 uint c;
2207
2208 printf("ESC%c", strescseq.type);
2209 for(i = 0; i < strescseq.len; i++) {
2210 c = strescseq.buf[i] & 0xff;
2211 if(c == '\0') {
2212 return;
2213 } else if(isprint(c)) {
2214 putchar(c);
2215 } else if(c == '\n') {
2216 printf("(\\n)");
2217 } else if(c == '\r') {
2218 printf("(\\r)");
2219 } else if(c == 0x1b) {
2220 printf("(\\e)");
2221 } else {
2222 printf("(%02x)", c);
2223 }
2224 }
2225 printf("ESC\\\n");
2226 }
2227
2228 void
2229 strreset(void) {
2230 memset(&strescseq, 0, sizeof(strescseq));
2231 }
2232
2233 void
2234 tprinter(char *s, size_t len) {
2235 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2236 fprintf(stderr, "Error writing in %s:%s\n",
2237 opt_io, strerror(errno));
2238 close(iofd);
2239 iofd = -1;
2240 }
2241 }
2242
2243 void
2244 toggleprinter(const Arg *arg) {
2245 term.mode ^= MODE_PRINT;
2246 }
2247
2248 void
2249 printscreen(const Arg *arg) {
2250 tdump();
2251 }
2252
2253 void
2254 printsel(const Arg *arg) {
2255 tdumpsel();
2256 }
2257
2258 void
2259 tdumpsel(void) {
2260 char *ptr;
2261
2262 if((ptr = getsel())) {
2263 tprinter(ptr, strlen(ptr));
2264 free(ptr);
2265 }
2266 }
2267
2268 void
2269 tdumpline(int n) {
2270 Glyph *bp, *end;
2271
2272 bp = &term.line[n][0];
2273 end = &bp[MIN(tlinelen(n), term.col) - 1];
2274 if(bp != end || bp->c[0] != ' ') {
2275 for( ;bp <= end; ++bp)
2276 tprinter(bp->c, utf8len(bp->c));
2277 }
2278 tprinter("\n", 1);
2279 }
2280
2281 void
2282 tdump(void) {
2283 int i;
2284
2285 for(i = 0; i < term.row; ++i)
2286 tdumpline(i);
2287 }
2288
2289 void
2290 tputtab(int n) {
2291 uint x = term.c.x;
2292
2293 if(n > 0) {
2294 while(x < term.col && n--)
2295 for(++x; x < term.col && !term.tabs[x]; ++x)
2296 /* nothing */ ;
2297 } else if(n < 0) {
2298 while(x > 0 && n++)
2299 for(--x; x > 0 && !term.tabs[x]; --x)
2300 /* nothing */ ;
2301 }
2302 tmoveto(x, term.c.y);
2303 }
2304
2305 void
2306 techo(char *buf, int len) {
2307 for(; len > 0; buf++, len--) {
2308 char c = *buf;
2309
2310 if(ISCONTROL(c)) { /* control code */
2311 if(c & 0x80) {
2312 c &= 0x7f;
2313 tputc("^", 1);
2314 tputc("[", 1);
2315 } else if(c != '\n' && c != '\r' && c != '\t') {
2316 c ^= '\x40';
2317 tputc("^", 1);
2318 }
2319 tputc(&c, 1);
2320 } else {
2321 break;
2322 }
2323 }
2324 if(len)
2325 tputc(buf, len);
2326 }
2327
2328 void
2329 tdeftran(char ascii) {
2330 static char cs[] = "0B";
2331 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2332 char *p;
2333
2334 if((p = strchr(cs, ascii)) == NULL) {
2335 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2336 } else {
2337 term.trantbl[term.icharset] = vcs[p - cs];
2338 }
2339 }
2340
2341 void
2342 tstrsequence(uchar c) {
2343 if (c & 0x80) {
2344 switch (c) {
2345 case 0x90: /* DCS -- Device Control String */
2346 c = 'P';
2347 break;
2348 case 0x9f: /* APC -- Application Program Command */
2349 c = '_';
2350 break;
2351 case 0x9e: /* PM -- Privacy Message */
2352 c = '^';
2353 break;
2354 case 0x9d: /* OSC -- Operating System Command */
2355 c = ']';
2356 break;
2357 }
2358 }
2359 strreset();
2360 strescseq.type = c;
2361 term.esc |= ESC_STR;
2362 return;
2363 }
2364
2365 void
2366 tcontrolcode(uchar ascii) {
2367 static char question[UTF_SIZ] = "?";
2368
2369 switch(ascii) {
2370 case '\t': /* HT */
2371 tputtab(1);
2372 return;
2373 case '\b': /* BS */
2374 tmoveto(term.c.x-1, term.c.y);
2375 return;
2376 case '\r': /* CR */
2377 tmoveto(0, term.c.y);
2378 return;
2379 case '\f': /* LF */
2380 case '\v': /* VT */
2381 case '\n': /* LF */
2382 /* go to first col if the mode is set */
2383 tnewline(IS_SET(MODE_CRLF));
2384 return;
2385 case '\a': /* BEL */
2386 if(term.esc & ESC_STR_END) {
2387 /* backwards compatibility to xterm */
2388 strhandle();
2389 } else {
2390 if(!(xw.state & WIN_FOCUSED))
2391 xseturgency(1);
2392 if (bellvolume)
2393 XBell(xw.dpy, bellvolume);
2394 }
2395 break;
2396 case '\033': /* ESC */
2397 csireset();
2398 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2399 term.esc |= ESC_START;
2400 return;
2401 case '\016': /* SO */
2402 term.charset = 0;
2403 return;
2404 case '\017': /* SI */
2405 term.charset = 1;
2406 return;
2407 case '\032': /* SUB */
2408 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2409 case '\030': /* CAN */
2410 csireset();
2411 break;
2412 case '\005': /* ENQ (IGNORED) */
2413 case '\000': /* NUL (IGNORED) */
2414 case '\021': /* XON (IGNORED) */
2415 case '\023': /* XOFF (IGNORED) */
2416 case 0177: /* DEL (IGNORED) */
2417 return;
2418 case 0x84: /* TODO: IND */
2419 break;
2420 case 0x85: /* NEL -- Next line */
2421 tnewline(1); /* always go to first col */
2422 break;
2423 case 0x88: /* HTS -- Horizontal tab stop */
2424 term.tabs[term.c.x] = 1;
2425 break;
2426 case 0x8d: /* TODO: RI */
2427 case 0x8e: /* TODO: SS2 */
2428 case 0x8f: /* TODO: SS3 */
2429 case 0x98: /* TODO: SOS */
2430 break;
2431 case 0x9a: /* DECID -- Identify Terminal */
2432 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2433 break;
2434 case 0x9b: /* TODO: CSI */
2435 case 0x9c: /* TODO: ST */
2436 break;
2437 case 0x90: /* DCS -- Device Control String */
2438 case 0x9f: /* APC -- Application Program Command */
2439 case 0x9e: /* PM -- Privacy Message */
2440 case 0x9d: /* OSC -- Operating System Command */
2441 tstrsequence(ascii);
2442 return;
2443 }
2444 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2445 term.esc &= ~(ESC_STR_END|ESC_STR);
2446 return;
2447 }
2448
2449 void
2450 tdectest(char c) {
2451 static char E[UTF_SIZ] = "E";
2452 int x, y;
2453
2454 if(c == '8') { /* DEC screen alignment test. */
2455 for(x = 0; x < term.col; ++x) {
2456 for(y = 0; y < term.row; ++y)
2457 tsetchar(E, &term.c.attr, x, y);
2458 }
2459 }
2460 }
2461
2462 void
2463 tputc(char *c, int len) {
2464 uchar ascii;
2465 bool control;
2466 long unicodep;
2467 int width;
2468 Glyph *gp;
2469
2470 if(len == 1) {
2471 width = 1;
2472 unicodep = ascii = *c;
2473 } else {
2474 utf8decode(c, &unicodep, UTF_SIZ);
2475 width = wcwidth(unicodep);
2476 control = ISCONTROLC1(unicodep);
2477 ascii = unicodep;
2478 }
2479
2480 if(IS_SET(MODE_PRINT))
2481 tprinter(c, len);
2482 control = ISCONTROL(unicodep);
2483
2484 /*
2485 * STR sequence must be checked before anything else
2486 * because it uses all following characters until it
2487 * receives a ESC, a SUB, a ST or any other C1 control
2488 * character.
2489 */
2490 if(term.esc & ESC_STR) {
2491 if(width == 1 &&
2492 (ascii == '\a' || ascii == 030 ||
2493 ascii == 032 || ascii == 033 ||
2494 ISCONTROLC1(unicodep))) {
2495 term.esc &= ~(ESC_START|ESC_STR);
2496 term.esc |= ESC_STR_END;
2497 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2498 memmove(&strescseq.buf[strescseq.len], c, len);
2499 strescseq.len += len;
2500 return;
2501 } else {
2502 /*
2503 * Here is a bug in terminals. If the user never sends
2504 * some code to stop the str or esc command, then st
2505 * will stop responding. But this is better than
2506 * silently failing with unknown characters. At least
2507 * then users will report back.
2508 *
2509 * In the case users ever get fixed, here is the code:
2510 */
2511 /*
2512 * term.esc = 0;
2513 * strhandle();
2514 */
2515 return;
2516 }
2517 }
2518
2519 /*
2520 * Actions of control codes must be performed as soon they arrive
2521 * because they can be embedded inside a control sequence, and
2522 * they must not cause conflicts with sequences.
2523 */
2524 if(control) {
2525 tcontrolcode(ascii);
2526 /*
2527 * control codes are not shown ever
2528 */
2529 return;
2530 } else if(term.esc & ESC_START) {
2531 if(term.esc & ESC_CSI) {
2532 csiescseq.buf[csiescseq.len++] = ascii;
2533 if(BETWEEN(ascii, 0x40, 0x7E)
2534 || csiescseq.len >= \
2535 sizeof(csiescseq.buf)-1) {
2536 term.esc = 0;
2537 csiparse();
2538 csihandle();
2539 }
2540 return;
2541 } else if(term.esc & ESC_ALTCHARSET) {
2542 tdeftran(ascii);
2543 } else if(term.esc & ESC_TEST) {
2544 tdectest(ascii);
2545 } else {
2546 switch(ascii) {
2547 case '[':
2548 term.esc |= ESC_CSI;
2549 return;
2550 case '#':
2551 term.esc |= ESC_TEST;
2552 return;
2553 case 'P': /* DCS -- Device Control String */
2554 case '_': /* APC -- Application Program Command */
2555 case '^': /* PM -- Privacy Message */
2556 case ']': /* OSC -- Operating System Command */
2557 case 'k': /* old title set compatibility */
2558 tstrsequence(ascii);
2559 return;
2560 case '(': /* set primary charset G0 */
2561 case ')': /* set secondary charset G1 */
2562 case '*': /* set tertiary charset G2 */
2563 case '+': /* set quaternary charset G3 */
2564 term.icharset = ascii - '(';
2565 term.esc |= ESC_ALTCHARSET;
2566 return;
2567 case 'D': /* IND -- Linefeed */
2568 if(term.c.y == term.bot) {
2569 tscrollup(term.top, 1);
2570 } else {
2571 tmoveto(term.c.x, term.c.y+1);
2572 }
2573 break;
2574 case 'E': /* NEL -- Next line */
2575 tnewline(1); /* always go to first col */
2576 break;
2577 case 'H': /* HTS -- Horizontal tab stop */
2578 term.tabs[term.c.x] = 1;
2579 break;
2580 case 'M': /* RI -- Reverse index */
2581 if(term.c.y == term.top) {
2582 tscrolldown(term.top, 1);
2583 } else {
2584 tmoveto(term.c.x, term.c.y-1);
2585 }
2586 break;
2587 case 'Z': /* DECID -- Identify Terminal */
2588 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2589 break;
2590 case 'c': /* RIS -- Reset to inital state */
2591 treset();
2592 xresettitle();
2593 xloadcols();
2594 break;
2595 case '=': /* DECPAM -- Application keypad */
2596 term.mode |= MODE_APPKEYPAD;
2597 break;
2598 case '>': /* DECPNM -- Normal keypad */
2599 term.mode &= ~MODE_APPKEYPAD;
2600 break;
2601 case '7': /* DECSC -- Save Cursor */
2602 tcursor(CURSOR_SAVE);
2603 break;
2604 case '8': /* DECRC -- Restore Cursor */
2605 tcursor(CURSOR_LOAD);
2606 break;
2607 case '\\': /* ST -- String Terminator */
2608 if(term.esc & ESC_STR_END)
2609 strhandle();
2610 break;
2611 default:
2612 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2613 (uchar) ascii, isprint(ascii)? ascii:'.');
2614 break;
2615 }
2616 }
2617 term.esc = 0;
2618 /*
2619 * All characters which form part of a sequence are not
2620 * printed
2621 */
2622 return;
2623 }
2624 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2625 selclear(NULL);
2626
2627 gp = &term.line[term.c.y][term.c.x];
2628 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2629 gp->mode |= ATTR_WRAP;
2630 tnewline(1);
2631 }
2632
2633 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2634 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2635
2636 if(term.c.x+width > term.col)
2637 tnewline(1);
2638
2639 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2640
2641 if(width == 2) {
2642 gp->mode |= ATTR_WIDE;
2643 if(term.c.x+1 < term.col) {
2644 gp[1].c[0] = '\0';
2645 gp[1].mode = ATTR_WDUMMY;
2646 }
2647 }
2648 if(term.c.x+width < term.col) {
2649 tmoveto(term.c.x+width, term.c.y);
2650 } else {
2651 term.c.state |= CURSOR_WRAPNEXT;
2652 }
2653 }
2654
2655 int
2656 tresize(int col, int row) {
2657 int i;
2658 int minrow = MIN(row, term.row);
2659 int mincol = MIN(col, term.col);
2660 int slide = term.c.y - row + 1;
2661 bool *bp;
2662 Line *orig;
2663 TCursor c;
2664
2665 if(col < 1 || row < 1)
2666 return 0;
2667
2668 /* free unneeded rows */
2669 i = 0;
2670 if(slide > 0) {
2671 /*
2672 * slide screen to keep cursor where we expect it -
2673 * tscrollup would work here, but we can optimize to
2674 * memmove because we're freeing the earlier lines
2675 */
2676 for(/* i = 0 */; i < slide; i++) {
2677 free(term.line[i]);
2678 free(term.alt[i]);
2679 }
2680 memmove(term.line, term.line + slide, row * sizeof(Line));
2681 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2682 }
2683 for(i += row; i < term.row; i++) {
2684 free(term.line[i]);
2685 free(term.alt[i]);
2686 }
2687
2688 /* resize to new height */
2689 term.line = xrealloc(term.line, row * sizeof(Line));
2690 term.alt = xrealloc(term.alt, row * sizeof(Line));
2691 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2692 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2693
2694 /* resize each row to new width, zero-pad if needed */
2695 for(i = 0; i < minrow; i++) {
2696 term.dirty[i] = 1;
2697 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2698 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2699 }
2700
2701 /* allocate any new rows */
2702 for(/* i == minrow */; i < row; i++) {
2703 term.dirty[i] = 1;
2704 term.line[i] = xmalloc(col * sizeof(Glyph));
2705 term.alt[i] = xmalloc(col * sizeof(Glyph));
2706 }
2707 if(col > term.col) {
2708 bp = term.tabs + term.col;
2709
2710 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2711 while(--bp > term.tabs && !*bp)
2712 /* nothing */ ;
2713 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2714 *bp = 1;
2715 }
2716 /* update terminal size */
2717 term.col = col;
2718 term.row = row;
2719 /* reset scrolling region */
2720 tsetscroll(0, row-1);
2721 /* make use of the LIMIT in tmoveto */
2722 tmoveto(term.c.x, term.c.y);
2723 /* Clearing both screens */
2724 orig = term.line;
2725 c = term.c;
2726 do {
2727 if(mincol < col && 0 < minrow) {
2728 tclearregion(mincol, 0, col - 1, minrow - 1);
2729 }
2730 if(0 < col && minrow < row) {
2731 tclearregion(0, minrow, col - 1, row - 1);
2732 }
2733 tswapscreen();
2734 tcursor(CURSOR_LOAD);
2735 } while(orig != term.line);
2736 term.c = c;
2737
2738 return (slide > 0);
2739 }
2740
2741 void
2742 xresize(int col, int row) {
2743 xw.tw = MAX(1, col * xw.cw);
2744 xw.th = MAX(1, row * xw.ch);
2745
2746 XFreePixmap(xw.dpy, xw.buf);
2747 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2748 DefaultDepth(xw.dpy, xw.scr));
2749 XftDrawChange(xw.draw, xw.buf);
2750 xclear(0, 0, xw.w, xw.h);
2751 }
2752
2753 static inline ushort
2754 sixd_to_16bit(int x) {
2755 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2756 }
2757
2758 void
2759 xloadcols(void) {
2760 int i;
2761 XRenderColor color = { .alpha = 0xffff };
2762 static bool loaded;
2763 Color *cp;
2764
2765 if(loaded) {
2766 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2767 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2768 }
2769
2770 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2771 for(i = 0; i < LEN(colorname); i++) {
2772 if(!colorname[i])
2773 continue;
2774 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2775 die("Could not allocate color '%s'\n", colorname[i]);
2776 }
2777 }
2778
2779 /* load colors [16-231] ; same colors as xterm */
2780 for(i = 16; i < 6*6*6+16; i++) {
2781 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2782 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2783 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2784 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2785 die("Could not allocate color %d\n", i);
2786 }
2787
2788 /* load colors [232-255] ; grayscale */
2789 for(; i < 256; i++) {
2790 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2791 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2792 die("Could not allocate color %d\n", i);
2793 }
2794 loaded = true;
2795 }
2796
2797 int
2798 xsetcolorname(int x, const char *name) {
2799 XRenderColor color = { .alpha = 0xffff };
2800 Color ncolor;
2801
2802 if(!BETWEEN(x, 0, LEN(colorname)))
2803 return 1;
2804
2805 if(!name) {
2806 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2807 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2808 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2809 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2810 if(!XftColorAllocValue(xw.dpy, xw.vis,
2811 xw.cmap, &color, &ncolor)) {
2812 return 1;
2813 }
2814
2815 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2816 dc.col[x] = ncolor;
2817 return 0;
2818 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2819 color.red = color.green = color.blue = \
2820 0x0808 + 0x0a0a * (x - (16 + 216));
2821 if(!XftColorAllocValue(xw.dpy, xw.vis,
2822 xw.cmap, &color, &ncolor)) {
2823 return 1;
2824 }
2825
2826 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2827 dc.col[x] = ncolor;
2828 return 0;
2829 } else { /* system colors */
2830 name = colorname[x];
2831 }
2832 }
2833 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2834 return 1;
2835
2836 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2837 dc.col[x] = ncolor;
2838 return 0;
2839 }
2840
2841 void
2842 xtermclear(int col1, int row1, int col2, int row2) {
2843 XftDrawRect(xw.draw,
2844 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2845 borderpx + col1 * xw.cw,
2846 borderpx + row1 * xw.ch,
2847 (col2-col1+1) * xw.cw,
2848 (row2-row1+1) * xw.ch);
2849 }
2850
2851 /*
2852 * Absolute coordinates.
2853 */
2854 void
2855 xclear(int x1, int y1, int x2, int y2) {
2856 XftDrawRect(xw.draw,
2857 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2858 x1, y1, x2-x1, y2-y1);
2859 }
2860
2861 void
2862 xhints(void) {
2863 XClassHint class = {opt_class ? opt_class : termname, termname};
2864 XWMHints wm = {.flags = InputHint, .input = 1};
2865 XSizeHints *sizeh = NULL;
2866
2867 sizeh = XAllocSizeHints();
2868
2869 sizeh->flags = PSize | PResizeInc | PBaseSize;
2870 sizeh->height = xw.h;
2871 sizeh->width = xw.w;
2872 sizeh->height_inc = xw.ch;
2873 sizeh->width_inc = xw.cw;
2874 sizeh->base_height = 2 * borderpx;
2875 sizeh->base_width = 2 * borderpx;
2876 if(xw.isfixed == True) {
2877 sizeh->flags |= PMaxSize | PMinSize;
2878 sizeh->min_width = sizeh->max_width = xw.w;
2879 sizeh->min_height = sizeh->max_height = xw.h;
2880 }
2881 if(xw.gm & (XValue|YValue)) {
2882 sizeh->flags |= USPosition | PWinGravity;
2883 sizeh->x = xw.l;
2884 sizeh->y = xw.t;
2885 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2886 }
2887
2888 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2889 &class);
2890 XFree(sizeh);
2891 }
2892
2893 int
2894 xgeommasktogravity(int mask) {
2895 switch(mask & (XNegative|YNegative)) {
2896 case 0:
2897 return NorthWestGravity;
2898 case XNegative:
2899 return NorthEastGravity;
2900 case YNegative:
2901 return SouthWestGravity;
2902 }
2903 return SouthEastGravity;
2904 }
2905
2906 int
2907 xloadfont(Font *f, FcPattern *pattern) {
2908 FcPattern *match;
2909 FcResult result;
2910
2911 match = FcFontMatch(NULL, pattern, &result);
2912 if(!match)
2913 return 1;
2914
2915 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2916 FcPatternDestroy(match);
2917 return 1;
2918 }
2919
2920 f->set = NULL;
2921 f->pattern = FcPatternDuplicate(pattern);
2922
2923 f->ascent = f->match->ascent;
2924 f->descent = f->match->descent;
2925 f->lbearing = 0;
2926 f->rbearing = f->match->max_advance_width;
2927
2928 f->height = f->ascent + f->descent;
2929 f->width = f->lbearing + f->rbearing;
2930
2931 return 0;
2932 }
2933
2934 void
2935 xloadfonts(char *fontstr, double fontsize) {
2936 FcPattern *pattern;
2937 FcResult r_sz, r_psz;
2938 double fontval;
2939 float ceilf(float);
2940
2941 if(fontstr[0] == '-') {
2942 pattern = XftXlfdParse(fontstr, False, False);
2943 } else {
2944 pattern = FcNameParse((FcChar8 *)fontstr);
2945 }
2946
2947 if(!pattern)
2948 die("st: can't open font %s\n", fontstr);
2949
2950 if(fontsize > 0) {
2951 FcPatternDel(pattern, FC_PIXEL_SIZE);
2952 FcPatternDel(pattern, FC_SIZE);
2953 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2954 usedfontsize = fontsize;
2955 } else {
2956 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2957 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2958 if(r_psz == FcResultMatch) {
2959 usedfontsize = fontval;
2960 } else if(r_sz == FcResultMatch) {
2961 usedfontsize = -1;
2962 } else {
2963 /*
2964 * Default font size is 12, if none given. This is to
2965 * have a known usedfontsize value.
2966 */
2967 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2968 usedfontsize = 12;
2969 }
2970 }
2971
2972 FcConfigSubstitute(0, pattern, FcMatchPattern);
2973 FcDefaultSubstitute(pattern);
2974
2975 if(xloadfont(&dc.font, pattern))
2976 die("st: can't open font %s\n", fontstr);
2977
2978 if(usedfontsize < 0) {
2979 FcPatternGetDouble(dc.font.match->pattern,
2980 FC_PIXEL_SIZE, 0, &fontval);
2981 usedfontsize = fontval;
2982 }
2983
2984 /* Setting character width and height. */
2985 xw.cw = ceilf(dc.font.width * cwscale);
2986 xw.ch = ceilf(dc.font.height * chscale);
2987
2988 FcPatternDel(pattern, FC_SLANT);
2989 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2990 if(xloadfont(&dc.ifont, pattern))
2991 die("st: can't open font %s\n", fontstr);
2992
2993 FcPatternDel(pattern, FC_WEIGHT);
2994 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2995 if(xloadfont(&dc.ibfont, pattern))
2996 die("st: can't open font %s\n", fontstr);
2997
2998 FcPatternDel(pattern, FC_SLANT);
2999 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3000 if(xloadfont(&dc.bfont, pattern))
3001 die("st: can't open font %s\n", fontstr);
3002
3003 FcPatternDestroy(pattern);
3004 }
3005
3006 int
3007 xloadfontset(Font *f) {
3008 FcResult result;
3009
3010 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3011 return 1;
3012 return 0;
3013 }
3014
3015 void
3016 xunloadfont(Font *f) {
3017 XftFontClose(xw.dpy, f->match);
3018 FcPatternDestroy(f->pattern);
3019 if(f->set)
3020 FcFontSetDestroy(f->set);
3021 }
3022
3023 void
3024 xunloadfonts(void) {
3025 /* Free the loaded fonts in the font cache. */
3026 while(frclen > 0)
3027 XftFontClose(xw.dpy, frc[--frclen].font);
3028
3029 xunloadfont(&dc.font);
3030 xunloadfont(&dc.bfont);
3031 xunloadfont(&dc.ifont);
3032 xunloadfont(&dc.ibfont);
3033 }
3034
3035 void
3036 xzoom(const Arg *arg) {
3037 xunloadfonts();
3038 xloadfonts(usedfont, usedfontsize + arg->i);
3039 cresize(0, 0);
3040 redraw(0);
3041 xhints();
3042 }
3043
3044 void
3045 xinit(void) {
3046 XGCValues gcvalues;
3047 Cursor cursor;
3048 Window parent;
3049 pid_t thispid = getpid();
3050
3051 if(!(xw.dpy = XOpenDisplay(NULL)))
3052 die("Can't open display\n");
3053 xw.scr = XDefaultScreen(xw.dpy);
3054 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3055
3056 /* font */
3057 if(!FcInit())
3058 die("Could not init fontconfig.\n");
3059
3060 usedfont = (opt_font == NULL)? font : opt_font;
3061 xloadfonts(usedfont, 0);
3062
3063 /* colors */
3064 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3065 xloadcols();
3066
3067 /* adjust fixed window geometry */
3068 xw.w = 2 * borderpx + term.col * xw.cw;
3069 xw.h = 2 * borderpx + term.row * xw.ch;
3070 if(xw.gm & XNegative)
3071 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3072 if(xw.gm & YNegative)
3073 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3074
3075 /* Events */
3076 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3077 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3078 xw.attrs.bit_gravity = NorthWestGravity;
3079 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3080 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3081 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3082 xw.attrs.colormap = xw.cmap;
3083
3084 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3085 XRootWindow(xw.dpy, xw.scr);
3086 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3087 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3088 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3089 | CWEventMask | CWColormap, &xw.attrs);
3090
3091 memset(&gcvalues, 0, sizeof(gcvalues));
3092 gcvalues.graphics_exposures = False;
3093 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3094 &gcvalues);
3095 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3096 DefaultDepth(xw.dpy, xw.scr));
3097 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3098 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3099
3100 /* Xft rendering context */
3101 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3102
3103 /* input methods */
3104 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3105 XSetLocaleModifiers("@im=local");
3106 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3107 XSetLocaleModifiers("@im=");
3108 if((xw.xim = XOpenIM(xw.dpy,
3109 NULL, NULL, NULL)) == NULL) {
3110 die("XOpenIM failed. Could not open input"
3111 " device.\n");
3112 }
3113 }
3114 }
3115 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3116 | XIMStatusNothing, XNClientWindow, xw.win,
3117 XNFocusWindow, xw.win, NULL);
3118 if(xw.xic == NULL)
3119 die("XCreateIC failed. Could not obtain input method.\n");
3120
3121 /* white cursor, black outline */
3122 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3123 XDefineCursor(xw.dpy, xw.win, cursor);
3124 XRecolorCursor(xw.dpy, cursor,
3125 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3126 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3127
3128 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3129 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3130 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3131 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3132
3133 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3134 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3135 PropModeReplace, (uchar *)&thispid, 1);
3136
3137 xresettitle();
3138 XMapWindow(xw.dpy, xw.win);
3139 xhints();
3140 XSync(xw.dpy, False);
3141 }
3142
3143 void
3144 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3145 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3146 width = charlen * xw.cw, xp, i;
3147 int frcflags;
3148 int u8fl, u8fblen, u8cblen, doesexist;
3149 char *u8c, *u8fs;
3150 long unicodep;
3151 Font *font = &dc.font;
3152 FcResult fcres;
3153 FcPattern *fcpattern, *fontpattern;
3154 FcFontSet *fcsets[] = { NULL };
3155 FcCharSet *fccharset;
3156 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3157 XRenderColor colfg, colbg;
3158 XRectangle r;
3159 int oneatatime;
3160
3161 frcflags = FRC_NORMAL;
3162
3163 if(base.mode & ATTR_ITALIC) {
3164 if(base.fg == defaultfg)
3165 base.fg = defaultitalic;
3166 font = &dc.ifont;
3167 frcflags = FRC_ITALIC;
3168 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3169 if(base.fg == defaultfg)
3170 base.fg = defaultitalic;
3171 font = &dc.ibfont;
3172 frcflags = FRC_ITALICBOLD;
3173 } else if(base.mode & ATTR_UNDERLINE) {
3174 if(base.fg == defaultfg)
3175 base.fg = defaultunderline;
3176 }
3177
3178 if(IS_TRUECOL(base.fg)) {
3179 colfg.alpha = 0xffff;
3180 colfg.red = TRUERED(base.fg);
3181 colfg.green = TRUEGREEN(base.fg);
3182 colfg.blue = TRUEBLUE(base.fg);
3183 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3184 fg = &truefg;
3185 } else {
3186 fg = &dc.col[base.fg];
3187 }
3188
3189 if(IS_TRUECOL(base.bg)) {
3190 colbg.alpha = 0xffff;
3191 colbg.green = TRUEGREEN(base.bg);
3192 colbg.red = TRUERED(base.bg);
3193 colbg.blue = TRUEBLUE(base.bg);
3194 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3195 bg = &truebg;
3196 } else {
3197 bg = &dc.col[base.bg];
3198 }
3199
3200 if(base.mode & ATTR_BOLD) {
3201 /*
3202 * change basic system colors [0-7]
3203 * to bright system colors [8-15]
3204 */
3205 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3206 fg = &dc.col[base.fg + 8];
3207
3208 if(base.mode & ATTR_ITALIC) {
3209 font = &dc.ibfont;
3210 frcflags = FRC_ITALICBOLD;
3211 } else {
3212 font = &dc.bfont;
3213 frcflags = FRC_BOLD;
3214 }
3215 }
3216
3217 if(IS_SET(MODE_REVERSE)) {
3218 if(fg == &dc.col[defaultfg]) {
3219 fg = &dc.col[defaultbg];
3220 } else {
3221 colfg.red = ~fg->color.red;
3222 colfg.green = ~fg->color.green;
3223 colfg.blue = ~fg->color.blue;
3224 colfg.alpha = fg->color.alpha;
3225 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3226 &revfg);
3227 fg = &revfg;
3228 }
3229
3230 if(bg == &dc.col[defaultbg]) {
3231 bg = &dc.col[defaultfg];
3232 } else {
3233 colbg.red = ~bg->color.red;
3234 colbg.green = ~bg->color.green;
3235 colbg.blue = ~bg->color.blue;
3236 colbg.alpha = bg->color.alpha;
3237 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3238 &revbg);
3239 bg = &revbg;
3240 }
3241 }
3242
3243 if(base.mode & ATTR_REVERSE) {
3244 temp = fg;
3245 fg = bg;
3246 bg = temp;
3247 }
3248
3249 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3250 colfg.red = fg->color.red / 2;
3251 colfg.green = fg->color.green / 2;
3252 colfg.blue = fg->color.blue / 2;
3253 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3254 fg = &revfg;
3255 }
3256
3257 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3258 fg = bg;
3259
3260 if(base.mode & ATTR_INVISIBLE)
3261 fg = bg;
3262
3263 /* Intelligent cleaning up of the borders. */
3264 if(x == 0) {
3265 xclear(0, (y == 0)? 0 : winy, borderpx,
3266 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3267 }
3268 if(x + charlen >= term.col) {
3269 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3270 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3271 }
3272 if(y == 0)
3273 xclear(winx, 0, winx + width, borderpx);
3274 if(y == term.row-1)
3275 xclear(winx, winy + xw.ch, winx + width, xw.h);
3276
3277 /* Clean up the region we want to draw to. */
3278 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3279
3280 /* Set the clip region because Xft is sometimes dirty. */
3281 r.x = 0;
3282 r.y = 0;
3283 r.height = xw.ch;
3284 r.width = width;
3285 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3286
3287 for(xp = winx; bytelen > 0;) {
3288 /*
3289 * Search for the range in the to be printed string of glyphs
3290 * that are in the main font. Then print that range. If
3291 * some glyph is found that is not in the font, do the
3292 * fallback dance.
3293 */
3294 u8fs = s;
3295 u8fblen = 0;
3296 u8fl = 0;
3297 oneatatime = font->width != xw.cw;
3298 for(;;) {
3299 u8c = s;
3300 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3301 s += u8cblen;
3302 bytelen -= u8cblen;
3303
3304 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3305 if(doesexist) {
3306 u8fl++;
3307 u8fblen += u8cblen;
3308 if(!oneatatime && bytelen > 0)
3309 continue;
3310 }
3311
3312 if(u8fl > 0) {
3313 XftDrawStringUtf8(xw.draw, fg,
3314 font->match, xp,
3315 winy + font->ascent,
3316 (FcChar8 *)u8fs,
3317 u8fblen);
3318 xp += xw.cw * u8fl;
3319 }
3320 break;
3321 }
3322 if(doesexist) {
3323 if(oneatatime)
3324 continue;
3325 break;
3326 }
3327
3328 /* Search the font cache. */
3329 for(i = 0; i < frclen; i++) {
3330 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3331 && frc[i].flags == frcflags) {
3332 break;
3333 }
3334 }
3335
3336 /* Nothing was found. */
3337 if(i >= frclen) {
3338 if(!font->set)
3339 xloadfontset(font);
3340 fcsets[0] = font->set;
3341
3342 /*
3343 * Nothing was found in the cache. Now use
3344 * some dozen of Fontconfig calls to get the
3345 * font for one single character.
3346 *
3347 * Xft and fontconfig are design failures.
3348 */
3349 fcpattern = FcPatternDuplicate(font->pattern);
3350 fccharset = FcCharSetCreate();
3351
3352 FcCharSetAddChar(fccharset, unicodep);
3353 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3354 fccharset);
3355 FcPatternAddBool(fcpattern, FC_SCALABLE,
3356 FcTrue);
3357
3358 FcConfigSubstitute(0, fcpattern,
3359 FcMatchPattern);
3360 FcDefaultSubstitute(fcpattern);
3361
3362 fontpattern = FcFontSetMatch(0, fcsets,
3363 FcTrue, fcpattern, &fcres);
3364
3365 /*
3366 * Overwrite or create the new cache entry.
3367 */
3368 if(frclen >= LEN(frc)) {
3369 frclen = LEN(frc) - 1;
3370 XftFontClose(xw.dpy, frc[frclen].font);
3371 }
3372
3373 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3374 fontpattern);
3375 frc[frclen].flags = frcflags;
3376
3377 i = frclen;
3378 frclen++;
3379
3380 FcPatternDestroy(fcpattern);
3381 FcCharSetDestroy(fccharset);
3382 }
3383
3384 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3385 xp, winy + frc[i].font->ascent,
3386 (FcChar8 *)u8c, u8cblen);
3387
3388 xp += xw.cw * wcwidth(unicodep);
3389 }
3390
3391 /*
3392 * This is how the loop above actually should be. Why does the
3393 * application have to care about font details?
3394 *
3395 * I have to repeat: Xft and Fontconfig are design failures.
3396 */
3397 /*
3398 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3399 winy + font->ascent, (FcChar8 *)s, bytelen);
3400 */
3401
3402 if(base.mode & ATTR_UNDERLINE) {
3403 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3404 width, 1);
3405 }
3406
3407 if(base.mode & ATTR_STRUCK) {
3408 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3409 width, 1);
3410 }
3411
3412 /* Reset clip to none. */
3413 XftDrawSetClip(xw.draw, 0);
3414 }
3415
3416 void
3417 xdrawcursor(void) {
3418 static int oldx = 0, oldy = 0;
3419 int sl, width, curx;
3420 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3421
3422 LIMIT(oldx, 0, term.col-1);
3423 LIMIT(oldy, 0, term.row-1);
3424
3425 curx = term.c.x;
3426
3427 /* adjust position if in dummy */
3428 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3429 oldx--;
3430 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3431 curx--;
3432
3433 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3434
3435 /* remove the old cursor */
3436 sl = utf8len(term.line[oldy][oldx].c);
3437 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3438 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3439 oldy, width, sl);
3440
3441 /* draw the new one */
3442 if(!(IS_SET(MODE_HIDE))) {
3443 if(xw.state & WIN_FOCUSED) {
3444 if(IS_SET(MODE_REVERSE)) {
3445 g.mode |= ATTR_REVERSE;
3446 g.fg = defaultcs;
3447 g.bg = defaultfg;
3448 }
3449
3450 sl = utf8len(g.c);
3451 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3452 ? 2 : 1;
3453 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3454 } else {
3455 XftDrawRect(xw.draw, &dc.col[defaultcs],
3456 borderpx + curx * xw.cw,
3457 borderpx + term.c.y * xw.ch,
3458 xw.cw - 1, 1);
3459 XftDrawRect(xw.draw, &dc.col[defaultcs],
3460 borderpx + curx * xw.cw,
3461 borderpx + term.c.y * xw.ch,
3462 1, xw.ch - 1);
3463 XftDrawRect(xw.draw, &dc.col[defaultcs],
3464 borderpx + (curx + 1) * xw.cw - 1,
3465 borderpx + term.c.y * xw.ch,
3466 1, xw.ch - 1);
3467 XftDrawRect(xw.draw, &dc.col[defaultcs],
3468 borderpx + curx * xw.cw,
3469 borderpx + (term.c.y + 1) * xw.ch - 1,
3470 xw.cw, 1);
3471 }
3472 oldx = curx, oldy = term.c.y;
3473 }
3474 }
3475
3476
3477 void
3478 xsettitle(char *p) {
3479 XTextProperty prop;
3480
3481 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3482 &prop);
3483 XSetWMName(xw.dpy, xw.win, &prop);
3484 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3485 XFree(prop.value);
3486 }
3487
3488 void
3489 xresettitle(void) {
3490 xsettitle(opt_title ? opt_title : "st");
3491 }
3492
3493 void
3494 redraw(int timeout) {
3495 struct timespec tv = {0, timeout * 1000};
3496
3497 tfulldirt();
3498 draw();
3499
3500 if(timeout > 0) {
3501 nanosleep(&tv, NULL);
3502 XSync(xw.dpy, False); /* necessary for a good tput flash */
3503 }
3504 }
3505
3506 void
3507 draw(void) {
3508 drawregion(0, 0, term.col, term.row);
3509 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3510 xw.h, 0, 0);
3511 XSetForeground(xw.dpy, dc.gc,
3512 dc.col[IS_SET(MODE_REVERSE)?
3513 defaultfg : defaultbg].pixel);
3514 }
3515
3516 void
3517 drawregion(int x1, int y1, int x2, int y2) {
3518 int ic, ib, x, y, ox, sl;
3519 Glyph base, new;
3520 char buf[DRAW_BUF_SIZ];
3521 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3522 long unicodep;
3523
3524 if(!(xw.state & WIN_VISIBLE))
3525 return;
3526
3527 for(y = y1; y < y2; y++) {
3528 if(!term.dirty[y])
3529 continue;
3530
3531 xtermclear(0, y, term.col, y);
3532 term.dirty[y] = 0;
3533 base = term.line[y][0];
3534 ic = ib = ox = 0;
3535 for(x = x1; x < x2; x++) {
3536 new = term.line[y][x];
3537 if(new.mode == ATTR_WDUMMY)
3538 continue;
3539 if(ena_sel && selected(x, y))
3540 new.mode ^= ATTR_REVERSE;
3541 if(ib > 0 && (ATTRCMP(base, new)
3542 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3543 xdraws(buf, base, ox, y, ic, ib);
3544 ic = ib = 0;
3545 }
3546 if(ib == 0) {
3547 ox = x;
3548 base = new;
3549 }
3550
3551 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3552 memcpy(buf+ib, new.c, sl);
3553 ib += sl;
3554 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3555 }
3556 if(ib > 0)
3557 xdraws(buf, base, ox, y, ic, ib);
3558 }
3559 xdrawcursor();
3560 }
3561
3562 void
3563 expose(XEvent *ev) {
3564 XExposeEvent *e = &ev->xexpose;
3565
3566 if(xw.state & WIN_REDRAW) {
3567 if(!e->count)
3568 xw.state &= ~WIN_REDRAW;
3569 }
3570 redraw(0);
3571 }
3572
3573 void
3574 visibility(XEvent *ev) {
3575 XVisibilityEvent *e = &ev->xvisibility;
3576
3577 if(e->state == VisibilityFullyObscured) {
3578 xw.state &= ~WIN_VISIBLE;
3579 } else if(!(xw.state & WIN_VISIBLE)) {
3580 /* need a full redraw for next Expose, not just a buf copy */
3581 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3582 }
3583 }
3584
3585 void
3586 unmap(XEvent *ev) {
3587 xw.state &= ~WIN_VISIBLE;
3588 }
3589
3590 void
3591 xsetpointermotion(int set) {
3592 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3593 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3594 }
3595
3596 void
3597 xseturgency(int add) {
3598 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3599
3600 MODBIT(h->flags, add, XUrgencyHint);
3601 XSetWMHints(xw.dpy, xw.win, h);
3602 XFree(h);
3603 }
3604
3605 void
3606 focus(XEvent *ev) {
3607 XFocusChangeEvent *e = &ev->xfocus;
3608
3609 if(e->mode == NotifyGrab)
3610 return;
3611
3612 if(ev->type == FocusIn) {
3613 XSetICFocus(xw.xic);
3614 xw.state |= WIN_FOCUSED;
3615 xseturgency(0);
3616 if(IS_SET(MODE_FOCUS))
3617 ttywrite("\033[I", 3);
3618 } else {
3619 XUnsetICFocus(xw.xic);
3620 xw.state &= ~WIN_FOCUSED;
3621 if(IS_SET(MODE_FOCUS))
3622 ttywrite("\033[O", 3);
3623 }
3624 }
3625
3626 static inline bool
3627 match(uint mask, uint state) {
3628 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3629 }
3630
3631 void
3632 numlock(const Arg *dummy) {
3633 term.numlock ^= 1;
3634 }
3635
3636 char*
3637 kmap(KeySym k, uint state) {
3638 Key *kp;
3639 int i;
3640
3641 /* Check for mapped keys out of X11 function keys. */
3642 for(i = 0; i < LEN(mappedkeys); i++) {
3643 if(mappedkeys[i] == k)
3644 break;
3645 }
3646 if(i == LEN(mappedkeys)) {
3647 if((k & 0xFFFF) < 0xFD00)
3648 return NULL;
3649 }
3650
3651 for(kp = key; kp < key + LEN(key); kp++) {
3652 if(kp->k != k)
3653 continue;
3654
3655 if(!match(kp->mask, state))
3656 continue;
3657
3658 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3659 continue;
3660 if(term.numlock && kp->appkey == 2)
3661 continue;
3662
3663 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3664 continue;
3665
3666 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3667 continue;
3668
3669 return kp->s;
3670 }
3671
3672 return NULL;
3673 }
3674
3675 void
3676 kpress(XEvent *ev) {
3677 XKeyEvent *e = &ev->xkey;
3678 KeySym ksym;
3679 char buf[32], *customkey;
3680 int len;
3681 long c;
3682 Status status;
3683 Shortcut *bp;
3684
3685 if(IS_SET(MODE_KBDLOCK))
3686 return;
3687
3688 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3689 /* 1. shortcuts */
3690 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3691 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3692 bp->func(&(bp->arg));
3693 return;
3694 }
3695 }
3696
3697 /* 2. custom keys from config.h */
3698 if((customkey = kmap(ksym, e->state))) {
3699 ttysend(customkey, strlen(customkey));
3700 return;
3701 }
3702
3703 /* 3. composed string from input method */
3704 if(len == 0)
3705 return;
3706 if(len == 1 && e->state & Mod1Mask) {
3707 if(IS_SET(MODE_8BIT)) {
3708 if(*buf < 0177) {
3709 c = *buf | 0x80;
3710 len = utf8encode(c, buf, UTF_SIZ);
3711 }
3712 } else {
3713 buf[1] = buf[0];
3714 buf[0] = '\033';
3715 len = 2;
3716 }
3717 }
3718 ttysend(buf, len);
3719 }
3720
3721
3722 void
3723 cmessage(XEvent *e) {
3724 /*
3725 * See xembed specs
3726 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3727 */
3728 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3729 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3730 xw.state |= WIN_FOCUSED;
3731 xseturgency(0);
3732 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3733 xw.state &= ~WIN_FOCUSED;
3734 }
3735 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3736 /* Send SIGHUP to shell */
3737 kill(pid, SIGHUP);
3738 exit(EXIT_SUCCESS);
3739 }
3740 }
3741
3742 void
3743 cresize(int width, int height) {
3744 int col, row;
3745
3746 if(width != 0)
3747 xw.w = width;
3748 if(height != 0)
3749 xw.h = height;
3750
3751 col = (xw.w - 2 * borderpx) / xw.cw;
3752 row = (xw.h - 2 * borderpx) / xw.ch;
3753
3754 tresize(col, row);
3755 xresize(col, row);
3756 ttyresize();
3757 }
3758
3759 void
3760 resize(XEvent *e) {
3761 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3762 return;
3763
3764 cresize(e->xconfigure.width, e->xconfigure.height);
3765 }
3766
3767 void
3768 run(void) {
3769 XEvent ev;
3770 int w = xw.w, h = xw.h;
3771 fd_set rfd;
3772 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3773 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3774 long deltatime;
3775
3776 /* Waiting for window mapping */
3777 while(1) {
3778 XNextEvent(xw.dpy, &ev);
3779 if(XFilterEvent(&ev, None))
3780 continue;
3781 if(ev.type == ConfigureNotify) {
3782 w = ev.xconfigure.width;
3783 h = ev.xconfigure.height;
3784 } else if(ev.type == MapNotify) {
3785 break;
3786 }
3787 }
3788
3789 ttynew();
3790 cresize(w, h);
3791
3792 clock_gettime(CLOCK_MONOTONIC, &last);
3793 lastblink = last;
3794
3795 for(xev = actionfps;;) {
3796 FD_ZERO(&rfd);
3797 FD_SET(cmdfd, &rfd);
3798 FD_SET(xfd, &rfd);
3799
3800 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3801 if(errno == EINTR)
3802 continue;
3803 die("select failed: %s\n", strerror(errno));
3804 }
3805 if(FD_ISSET(cmdfd, &rfd)) {
3806 ttyread();
3807 if(blinktimeout) {
3808 blinkset = tattrset(ATTR_BLINK);
3809 if(!blinkset)
3810 MODBIT(term.mode, 0, MODE_BLINK);
3811 }
3812 }
3813
3814 if(FD_ISSET(xfd, &rfd))
3815 xev = actionfps;
3816
3817 clock_gettime(CLOCK_MONOTONIC, &now);
3818 drawtimeout.tv_sec = 0;
3819 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3820 tv = &drawtimeout;
3821
3822 dodraw = 0;
3823 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3824 tsetdirtattr(ATTR_BLINK);
3825 term.mode ^= MODE_BLINK;
3826 lastblink = now;
3827 dodraw = 1;
3828 }
3829 deltatime = TIMEDIFF(now, last);
3830 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3831 || deltatime < 0) {
3832 dodraw = 1;
3833 last = now;
3834 }
3835
3836 if(dodraw) {
3837 while(XPending(xw.dpy)) {
3838 XNextEvent(xw.dpy, &ev);
3839 if(XFilterEvent(&ev, None))
3840 continue;
3841 if(handler[ev.type])
3842 (handler[ev.type])(&ev);
3843 }
3844
3845 draw();
3846 XFlush(xw.dpy);
3847
3848 if(xev && !FD_ISSET(xfd, &rfd))
3849 xev--;
3850 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3851 if(blinkset) {
3852 if(TIMEDIFF(now, lastblink) \
3853 > blinktimeout) {
3854 drawtimeout.tv_nsec = 1000;
3855 } else {
3856 drawtimeout.tv_nsec = (1E6 * \
3857 (blinktimeout - \
3858 TIMEDIFF(now,
3859 lastblink)));
3860 }
3861 } else {
3862 tv = NULL;
3863 }
3864 }
3865 }
3866 }
3867 }
3868
3869 void
3870 usage(void) {
3871 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3872 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3873 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3874 }
3875
3876 int
3877 main(int argc, char *argv[]) {
3878 char *titles;
3879 uint cols = 80, rows = 24;
3880
3881 xw.l = xw.t = 0;
3882 xw.isfixed = False;
3883
3884 ARGBEGIN {
3885 case 'a':
3886 allowaltscreen = false;
3887 break;
3888 case 'c':
3889 opt_class = EARGF(usage());
3890 break;
3891 case 'e':
3892 /* eat all remaining arguments */
3893 if(argc > 1) {
3894 opt_cmd = &argv[1];
3895 if(argv[1] != NULL && opt_title == NULL) {
3896 titles = xstrdup(argv[1]);
3897 opt_title = basename(titles);
3898 }
3899 }
3900 goto run;
3901 case 'f':
3902 opt_font = EARGF(usage());
3903 break;
3904 case 'g':
3905 xw.gm = XParseGeometry(EARGF(usage()),
3906 &xw.l, &xw.t, &cols, &rows);
3907 break;
3908 case 'i':
3909 xw.isfixed = True;
3910 break;
3911 case 'o':
3912 opt_io = EARGF(usage());
3913 break;
3914 case 't':
3915 opt_title = EARGF(usage());
3916 break;
3917 case 'w':
3918 opt_embed = EARGF(usage());
3919 break;
3920 case 'v':
3921 default:
3922 usage();
3923 } ARGEND;
3924
3925 run:
3926 setlocale(LC_CTYPE, "");
3927 XSetLocaleModifiers("");
3928 tnew(cols? cols : 1, rows? rows : 1);
3929 xinit();
3930 selinit();
3931 run();
3932
3933 return 0;
3934 }
3935
simple terminal