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Use monotonic clock to prevent timing issues
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39
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)/10E6)
80 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
81 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
82
83 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
84 #define IS_TRUECOL(x) (1 << 24 & (x))
85 #define TRUERED(x) (((x) & 0xff0000) >> 8)
86 #define TRUEGREEN(x) (((x) & 0xff00))
87 #define TRUEBLUE(x) (((x) & 0xff) << 8)
88
89
90 #define VT102ID "\033[?6c"
91
92 enum glyph_attribute {
93 ATTR_NULL = 0,
94 ATTR_REVERSE = 1,
95 ATTR_UNDERLINE = 2,
96 ATTR_BOLD = 4,
97 ATTR_ITALIC = 8,
98 ATTR_BLINK = 16,
99 ATTR_WRAP = 32,
100 ATTR_WIDE = 64,
101 ATTR_WDUMMY = 128,
102 };
103
104 enum cursor_movement {
105 CURSOR_SAVE,
106 CURSOR_LOAD
107 };
108
109 enum cursor_state {
110 CURSOR_DEFAULT = 0,
111 CURSOR_WRAPNEXT = 1,
112 CURSOR_ORIGIN = 2
113 };
114
115 enum term_mode {
116 MODE_WRAP = 1,
117 MODE_INSERT = 2,
118 MODE_APPKEYPAD = 4,
119 MODE_ALTSCREEN = 8,
120 MODE_CRLF = 16,
121 MODE_MOUSEBTN = 32,
122 MODE_MOUSEMOTION = 64,
123 MODE_REVERSE = 128,
124 MODE_KBDLOCK = 256,
125 MODE_HIDE = 512,
126 MODE_ECHO = 1024,
127 MODE_APPCURSOR = 2048,
128 MODE_MOUSESGR = 4096,
129 MODE_8BIT = 8192,
130 MODE_BLINK = 16384,
131 MODE_FBLINK = 32768,
132 MODE_FOCUS = 65536,
133 MODE_MOUSEX10 = 131072,
134 MODE_MOUSEMANY = 262144,
135 MODE_BRCKTPASTE = 524288,
136 MODE_PRINT = 1048576,
137 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
138 |MODE_MOUSEMANY,
139 };
140
141 enum charset {
142 CS_GRAPHIC0,
143 CS_GRAPHIC1,
144 CS_UK,
145 CS_USA,
146 CS_MULTI,
147 CS_GER,
148 CS_FIN
149 };
150
151 enum escape_state {
152 ESC_START = 1,
153 ESC_CSI = 2,
154 ESC_STR = 4, /* DCS, OSC, PM, APC */
155 ESC_ALTCHARSET = 8,
156 ESC_STR_END = 16, /* a final string was encountered */
157 ESC_TEST = 32, /* Enter in test mode */
158 };
159
160 enum window_state {
161 WIN_VISIBLE = 1,
162 WIN_REDRAW = 2,
163 WIN_FOCUSED = 4
164 };
165
166 enum selection_type {
167 SEL_REGULAR = 1,
168 SEL_RECTANGULAR = 2
169 };
170
171 enum selection_snap {
172 SNAP_WORD = 1,
173 SNAP_LINE = 2
174 };
175
176 typedef unsigned char uchar;
177 typedef unsigned int uint;
178 typedef unsigned long ulong;
179 typedef unsigned short ushort;
180
181 typedef XftDraw *Draw;
182 typedef XftColor Color;
183
184 typedef struct {
185 char c[UTF_SIZ]; /* character code */
186 ushort mode; /* attribute flags */
187 uint32_t fg; /* foreground */
188 uint32_t bg; /* background */
189 } Glyph;
190
191 typedef Glyph *Line;
192
193 typedef struct {
194 Glyph attr; /* current char attributes */
195 int x;
196 int y;
197 char state;
198 } TCursor;
199
200 /* CSI Escape sequence structs */
201 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
202 typedef struct {
203 char buf[ESC_BUF_SIZ]; /* raw string */
204 int len; /* raw string length */
205 char priv;
206 int arg[ESC_ARG_SIZ];
207 int narg; /* nb of args */
208 char mode;
209 } CSIEscape;
210
211 /* STR Escape sequence structs */
212 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
213 typedef struct {
214 char type; /* ESC type ... */
215 char buf[STR_BUF_SIZ]; /* raw string */
216 int len; /* raw string length */
217 char *args[STR_ARG_SIZ];
218 int narg; /* nb of args */
219 } STREscape;
220
221 /* Internal representation of the screen */
222 typedef struct {
223 int row; /* nb row */
224 int col; /* nb col */
225 Line *line; /* screen */
226 Line *alt; /* alternate screen */
227 bool *dirty; /* dirtyness of lines */
228 TCursor c; /* cursor */
229 int top; /* top scroll limit */
230 int bot; /* bottom scroll limit */
231 int mode; /* terminal mode flags */
232 int esc; /* escape state flags */
233 char trantbl[4]; /* charset table translation */
234 int charset; /* current charset */
235 int icharset; /* selected charset for sequence */
236 bool numlock; /* lock numbers in keyboard */
237 bool *tabs;
238 } Term;
239
240 /* Purely graphic info */
241 typedef struct {
242 Display *dpy;
243 Colormap cmap;
244 Window win;
245 Drawable buf;
246 Atom xembed, wmdeletewin, netwmname, netwmpid;
247 XIM xim;
248 XIC xic;
249 Draw draw;
250 Visual *vis;
251 XSetWindowAttributes attrs;
252 int scr;
253 bool isfixed; /* is fixed geometry? */
254 int l, t; /* left and top offset */
255 int gm; /* geometry mask */
256 int tw, th; /* tty width and height */
257 int w, h; /* window width and height */
258 int ch; /* char height */
259 int cw; /* char width */
260 char state; /* focus, redraw, visible */
261 } XWindow;
262
263 typedef struct {
264 uint b;
265 uint mask;
266 char *s;
267 } Mousekey;
268
269 typedef struct {
270 KeySym k;
271 uint mask;
272 char *s;
273 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
274 signed char appkey; /* application keypad */
275 signed char appcursor; /* application cursor */
276 signed char crlf; /* crlf mode */
277 } Key;
278
279 typedef struct {
280 int mode;
281 int type;
282 int snap;
283 /*
284 * Selection variables:
285 * nb – normalized coordinates of the beginning of the selection
286 * ne – normalized coordinates of the end of the selection
287 * ob – original coordinates of the beginning of the selection
288 * oe – original coordinates of the end of the selection
289 */
290 struct {
291 int x, y;
292 } nb, ne, ob, oe;
293
294 char *clip;
295 Atom xtarget;
296 bool alt;
297 struct timespec tclick1;
298 struct timespec tclick2;
299 } Selection;
300
301 typedef union {
302 int i;
303 uint ui;
304 float f;
305 const void *v;
306 } Arg;
307
308 typedef struct {
309 uint mod;
310 KeySym keysym;
311 void (*func)(const Arg *);
312 const Arg arg;
313 } Shortcut;
314
315 /* function definitions used in config.h */
316 static void clippaste(const Arg *);
317 static void numlock(const Arg *);
318 static void selpaste(const Arg *);
319 static void xzoom(const Arg *);
320 static void printsel(const Arg *);
321 static void printscreen(const Arg *) ;
322 static void toggleprinter(const Arg *);
323
324 /* Config.h for applying patches and the configuration. */
325 #include "config.h"
326
327 /* Font structure */
328 typedef struct {
329 int height;
330 int width;
331 int ascent;
332 int descent;
333 short lbearing;
334 short rbearing;
335 XftFont *match;
336 FcFontSet *set;
337 FcPattern *pattern;
338 } Font;
339
340 /* Drawing Context */
341 typedef struct {
342 Color col[MAX(LEN(colorname), 256)];
343 Font font, bfont, ifont, ibfont;
344 GC gc;
345 } DC;
346
347 static void die(const char *, ...);
348 static void draw(void);
349 static void redraw(int);
350 static void drawregion(int, int, int, int);
351 static void execsh(void);
352 static void sigchld(int);
353 static void run(void);
354
355 static void csidump(void);
356 static void csihandle(void);
357 static void csiparse(void);
358 static void csireset(void);
359 static void strdump(void);
360 static void strhandle(void);
361 static void strparse(void);
362 static void strreset(void);
363
364 static int tattrset(int);
365 static void tprinter(char *, size_t);
366 static void tdumpsel(void);
367 static void tdumpline(int);
368 static void tdump(void);
369 static void tclearregion(int, int, int, int);
370 static void tcursor(int);
371 static void tdeletechar(int);
372 static void tdeleteline(int);
373 static void tinsertblank(int);
374 static void tinsertblankline(int);
375 static void tmoveto(int, int);
376 static void tmoveato(int, int);
377 static void tnew(int, int);
378 static void tnewline(int);
379 static void tputtab(int);
380 static void tputc(char *, int);
381 static void treset(void);
382 static int tresize(int, int);
383 static void tscrollup(int, int);
384 static void tscrolldown(int, int);
385 static void tsetattr(int *, int);
386 static void tsetchar(char *, Glyph *, int, int);
387 static void tsetscroll(int, int);
388 static void tswapscreen(void);
389 static void tsetdirt(int, int);
390 static void tsetdirtattr(int);
391 static void tsetmode(bool, bool, int *, int);
392 static void tfulldirt(void);
393 static void techo(char *, int);
394 static void tcontrolcode(uchar );
395 static void tdectest(char );
396 static int32_t tdefcolor(int *, int *, int);
397 static void tdeftran(char);
398 static inline bool match(uint, uint);
399 static void ttynew(void);
400 static void ttyread(void);
401 static void ttyresize(void);
402 static void ttysend(char *, size_t);
403 static void ttywrite(const char *, size_t);
404
405 static void xdraws(char *, Glyph, int, int, int, int);
406 static void xhints(void);
407 static void xclear(int, int, int, int);
408 static void xdrawcursor(void);
409 static void xinit(void);
410 static void xloadcols(void);
411 static int xsetcolorname(int, const char *);
412 static int xgeommasktogravity(int);
413 static int xloadfont(Font *, FcPattern *);
414 static void xloadfonts(char *, double);
415 static int xloadfontset(Font *);
416 static void xsettitle(char *);
417 static void xresettitle(void);
418 static void xsetpointermotion(int);
419 static void xseturgency(int);
420 static void xsetsel(char *);
421 static void xtermclear(int, int, int, int);
422 static void xunloadfont(Font *);
423 static void xunloadfonts(void);
424 static void xresize(int, int);
425
426 static void expose(XEvent *);
427 static void visibility(XEvent *);
428 static void unmap(XEvent *);
429 static char *kmap(KeySym, uint);
430 static void kpress(XEvent *);
431 static void cmessage(XEvent *);
432 static void cresize(int, int);
433 static void resize(XEvent *);
434 static void focus(XEvent *);
435 static void brelease(XEvent *);
436 static void bpress(XEvent *);
437 static void bmotion(XEvent *);
438 static void selnotify(XEvent *);
439 static void selclear(XEvent *);
440 static void selrequest(XEvent *);
441
442 static void selinit(void);
443 static void selnormalize(void);
444 static inline bool selected(int, int);
445 static char *getsel(void);
446 static void selcopy(void);
447 static void selscroll(int, int);
448 static void selsnap(int, int *, int *, int);
449 static void getbuttoninfo(XEvent *);
450 static void mousereport(XEvent *);
451
452 static size_t utf8decode(char *, long *, size_t);
453 static long utf8decodebyte(char, size_t *);
454 static size_t utf8encode(long, char *, size_t);
455 static char utf8encodebyte(long, size_t);
456 static size_t utf8len(char *);
457 static size_t utf8validate(long *, size_t);
458
459 static ssize_t xwrite(int, const char *, size_t);
460 static void *xmalloc(size_t);
461 static void *xrealloc(void *, size_t);
462 static char *xstrdup(char *);
463
464 static void usage(void);
465
466 static void (*handler[LASTEvent])(XEvent *) = {
467 [KeyPress] = kpress,
468 [ClientMessage] = cmessage,
469 [ConfigureNotify] = resize,
470 [VisibilityNotify] = visibility,
471 [UnmapNotify] = unmap,
472 [Expose] = expose,
473 [FocusIn] = focus,
474 [FocusOut] = focus,
475 [MotionNotify] = bmotion,
476 [ButtonPress] = bpress,
477 [ButtonRelease] = brelease,
478 [SelectionClear] = selclear,
479 [SelectionNotify] = selnotify,
480 [SelectionRequest] = selrequest,
481 };
482
483 /* Globals */
484 static DC dc;
485 static XWindow xw;
486 static Term term;
487 static CSIEscape csiescseq;
488 static STREscape strescseq;
489 static int cmdfd;
490 static pid_t pid;
491 static Selection sel;
492 static int iofd = STDOUT_FILENO;
493 static char **opt_cmd = NULL;
494 static char *opt_io = NULL;
495 static char *opt_title = NULL;
496 static char *opt_embed = NULL;
497 static char *opt_class = NULL;
498 static char *opt_font = NULL;
499 static int oldbutton = 3; /* button event on startup: 3 = release */
500
501 static char *usedfont = NULL;
502 static double usedfontsize = 0;
503
504 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
505 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
506 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
507 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
508
509 /* Font Ring Cache */
510 enum {
511 FRC_NORMAL,
512 FRC_ITALIC,
513 FRC_BOLD,
514 FRC_ITALICBOLD
515 };
516
517 typedef struct {
518 XftFont *font;
519 int flags;
520 } Fontcache;
521
522 /* Fontcache is an array now. A new font will be appended to the array. */
523 static Fontcache frc[16];
524 static int frclen = 0;
525
526 ssize_t
527 xwrite(int fd, const char *s, size_t len) {
528 size_t aux = len;
529
530 while(len > 0) {
531 ssize_t r = write(fd, s, len);
532 if(r < 0)
533 return r;
534 len -= r;
535 s += r;
536 }
537 return aux;
538 }
539
540 void *
541 xmalloc(size_t len) {
542 void *p = malloc(len);
543
544 if(!p)
545 die("Out of memory\n");
546
547 return p;
548 }
549
550 void *
551 xrealloc(void *p, size_t len) {
552 if((p = realloc(p, len)) == NULL)
553 die("Out of memory\n");
554
555 return p;
556 }
557
558 char *
559 xstrdup(char *s) {
560 if((s = strdup(s)) == NULL)
561 die("Out of memory\n");
562
563 return s;
564 }
565
566 size_t
567 utf8decode(char *c, long *u, size_t clen) {
568 size_t i, j, len, type;
569 long udecoded;
570
571 *u = UTF_INVALID;
572 if(!clen)
573 return 0;
574 udecoded = utf8decodebyte(c[0], &len);
575 if(!BETWEEN(len, 1, UTF_SIZ))
576 return 1;
577 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
578 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
579 if(type != 0)
580 return j;
581 }
582 if(j < len)
583 return 0;
584 *u = udecoded;
585 utf8validate(u, len);
586 return len;
587 }
588
589 long
590 utf8decodebyte(char c, size_t *i) {
591 for(*i = 0; *i < LEN(utfmask); ++(*i))
592 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
593 return (uchar)c & ~utfmask[*i];
594 return 0;
595 }
596
597 size_t
598 utf8encode(long u, char *c, size_t clen) {
599 size_t len, i;
600
601 len = utf8validate(&u, 0);
602 if(clen < len)
603 return 0;
604 for(i = len - 1; i != 0; --i) {
605 c[i] = utf8encodebyte(u, 0);
606 u >>= 6;
607 }
608 c[0] = utf8encodebyte(u, len);
609 return len;
610 }
611
612 char
613 utf8encodebyte(long u, size_t i) {
614 return utfbyte[i] | (u & ~utfmask[i]);
615 }
616
617 size_t
618 utf8len(char *c) {
619 return utf8decode(c, &(long){0}, UTF_SIZ);
620 }
621
622 size_t
623 utf8validate(long *u, size_t i) {
624 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
625 *u = UTF_INVALID;
626 for(i = 1; *u > utfmax[i]; ++i)
627 ;
628 return i;
629 }
630
631 static void
632 selinit(void) {
633 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
634 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
635 sel.mode = 0;
636 sel.ob.x = -1;
637 sel.clip = NULL;
638 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
639 if(sel.xtarget == None)
640 sel.xtarget = XA_STRING;
641 }
642
643 static int
644 x2col(int x) {
645 x -= borderpx;
646 x /= xw.cw;
647
648 return LIMIT(x, 0, term.col-1);
649 }
650
651 static int
652 y2row(int y) {
653 y -= borderpx;
654 y /= xw.ch;
655
656 return LIMIT(y, 0, term.row-1);
657 }
658
659 static int tlinelen(int y) {
660 int i = term.col;
661
662 while (i > 0 && term.line[y][i - 1].c[0] == ' ')
663 --i;
664
665 return i;
666 }
667
668 static void
669 selnormalize(void) {
670 int i;
671
672 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
673 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
674 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
675 } else {
676 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
677 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
678 }
679 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
680 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
681
682 /* expand selection over line breaks */
683 if (sel.type == SEL_RECTANGULAR)
684 return;
685 i = tlinelen(sel.nb.y);
686 if (i < sel.nb.x)
687 sel.nb.x = i;
688 if (tlinelen(sel.ne.y) <= sel.ne.x)
689 sel.ne.x = term.col - 1;
690 }
691
692 static inline bool
693 selected(int x, int y) {
694 if(sel.type == SEL_RECTANGULAR)
695 return BETWEEN(y, sel.nb.y, sel.ne.y)
696 && BETWEEN(x, sel.nb.x, sel.ne.x);
697
698 return BETWEEN(y, sel.nb.y, sel.ne.y)
699 && (y != sel.nb.y || x >= sel.nb.x)
700 && (y != sel.ne.y || x <= sel.ne.x);
701 }
702
703 void
704 selsnap(int mode, int *x, int *y, int direction) {
705 int newx, newy, xt, yt;
706 Glyph *gp;
707
708 switch(mode) {
709 case SNAP_WORD:
710 /*
711 * Snap around if the word wraps around at the end or
712 * beginning of a line.
713 */
714 for(;;) {
715 newx = *x + direction;
716 newy = *y;
717 if(!BETWEEN(newx, 0, term.col - 1)) {
718 newy += direction;
719 newx = (newx + term.col) % term.col;
720 if (!BETWEEN(newy, 0, term.row - 1))
721 break;
722
723 if(direction > 0)
724 yt = *y, xt = *x;
725 else
726 yt = newy, xt = newx;
727 if(!(term.line[yt][xt].mode & ATTR_WRAP))
728 break;
729 }
730
731 if (newx >= tlinelen(newy))
732 break;
733
734 gp = &term.line[newy][newx];
735 if (!(gp->mode & ATTR_WDUMMY) && strchr(worddelimiters, gp->c[0]))
736 break;
737
738 *x = newx;
739 *y = newy;
740 }
741 break;
742 case SNAP_LINE:
743 /*
744 * Snap around if the the previous line or the current one
745 * has set ATTR_WRAP at its end. Then the whole next or
746 * previous line will be selected.
747 */
748 *x = (direction < 0) ? 0 : term.col - 1;
749 if(direction < 0 && *y > 0) {
750 for(; *y > 0; *y += direction) {
751 if(!(term.line[*y-1][term.col-1].mode
752 & ATTR_WRAP)) {
753 break;
754 }
755 }
756 } else if(direction > 0 && *y < term.row-1) {
757 for(; *y < term.row; *y += direction) {
758 if(!(term.line[*y][term.col-1].mode
759 & ATTR_WRAP)) {
760 break;
761 }
762 }
763 }
764 break;
765 }
766 }
767
768 void
769 getbuttoninfo(XEvent *e) {
770 int type;
771 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
772
773 sel.alt = IS_SET(MODE_ALTSCREEN);
774
775 sel.oe.x = x2col(e->xbutton.x);
776 sel.oe.y = y2row(e->xbutton.y);
777
778 if(sel.ob.y < sel.oe.y
779 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
780 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
781 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
782 } else {
783 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
784 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
785 }
786 selnormalize();
787
788 sel.type = SEL_REGULAR;
789 for(type = 1; type < LEN(selmasks); ++type) {
790 if(match(selmasks[type], state)) {
791 sel.type = type;
792 break;
793 }
794 }
795 }
796
797 void
798 mousereport(XEvent *e) {
799 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
800 button = e->xbutton.button, state = e->xbutton.state,
801 len;
802 char buf[40];
803 static int ox, oy;
804
805 /* from urxvt */
806 if(e->xbutton.type == MotionNotify) {
807 if(x == ox && y == oy)
808 return;
809 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
810 return;
811 /* MOUSE_MOTION: no reporting if no button is pressed */
812 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
813 return;
814
815 button = oldbutton + 32;
816 ox = x;
817 oy = y;
818 } else {
819 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
820 button = 3;
821 } else {
822 button -= Button1;
823 if(button >= 3)
824 button += 64 - 3;
825 }
826 if(e->xbutton.type == ButtonPress) {
827 oldbutton = button;
828 ox = x;
829 oy = y;
830 } else if(e->xbutton.type == ButtonRelease) {
831 oldbutton = 3;
832 /* MODE_MOUSEX10: no button release reporting */
833 if(IS_SET(MODE_MOUSEX10))
834 return;
835 if (button == 64 || button == 65)
836 return;
837 }
838 }
839
840 if(!IS_SET(MODE_MOUSEX10)) {
841 button += (state & ShiftMask ? 4 : 0)
842 + (state & Mod4Mask ? 8 : 0)
843 + (state & ControlMask ? 16 : 0);
844 }
845
846 len = 0;
847 if(IS_SET(MODE_MOUSESGR)) {
848 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
849 button, x+1, y+1,
850 e->xbutton.type == ButtonRelease ? 'm' : 'M');
851 } else if(x < 223 && y < 223) {
852 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
853 32+button, 32+x+1, 32+y+1);
854 } else {
855 return;
856 }
857
858 ttywrite(buf, len);
859 }
860
861 void
862 bpress(XEvent *e) {
863 struct timespec now;
864 Mousekey *mk;
865
866 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
867 mousereport(e);
868 return;
869 }
870
871 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
872 if(e->xbutton.button == mk->b
873 && match(mk->mask, e->xbutton.state)) {
874 ttysend(mk->s, strlen(mk->s));
875 return;
876 }
877 }
878
879 if(e->xbutton.button == Button1) {
880 clock_gettime(CLOCK_MONOTONIC, &now);
881
882 /* Clear previous selection, logically and visually. */
883 selclear(NULL);
884 sel.mode = 1;
885 sel.type = SEL_REGULAR;
886 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
887 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
888
889 /*
890 * If the user clicks below predefined timeouts specific
891 * snapping behaviour is exposed.
892 */
893 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
894 sel.snap = SNAP_LINE;
895 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
896 sel.snap = SNAP_WORD;
897 } else {
898 sel.snap = 0;
899 }
900 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
901 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
902 selnormalize();
903
904 /*
905 * Draw selection, unless it's regular and we don't want to
906 * make clicks visible
907 */
908 if(sel.snap != 0) {
909 sel.mode++;
910 tsetdirt(sel.nb.y, sel.ne.y);
911 }
912 sel.tclick2 = sel.tclick1;
913 sel.tclick1 = now;
914 }
915 }
916
917 char *
918 getsel(void) {
919 char *str, *ptr;
920 int x, y, bufsize, size, ex;
921 Glyph *gp, *last;
922
923 if(sel.ob.x == -1)
924 return NULL;
925
926 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
927 ptr = str = xmalloc(bufsize);
928
929 /* append every set & selected glyph to the selection */
930 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
931 gp = &term.line[y][0];
932 last = &gp[term.col-1];
933
934 while(last >= gp && !(selected(last - gp, y) &&
935 strcmp(last->c, " ") != 0)) {
936 --last;
937 }
938
939 for(x = 0; gp <= last; x++, ++gp) {
940 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
941 continue;
942
943 size = utf8len(gp->c);
944 memcpy(ptr, gp->c, size);
945 ptr += size;
946 }
947
948 /*
949 * Copy and pasting of line endings is inconsistent
950 * in the inconsistent terminal and GUI world.
951 * The best solution seems like to produce '\n' when
952 * something is copied from st and convert '\n' to
953 * '\r', when something to be pasted is received by
954 * st.
955 * FIXME: Fix the computer world.
956 */
957 if(y < sel.ne.y && !(x > 0 && (gp-1)->mode & ATTR_WRAP))
958 *ptr++ = '\n';
959
960 /*
961 * If the last selected line expands in the selection
962 * after the visible text '\n' is appended.
963 */
964 if(y == sel.ne.y) {
965 ex = sel.ne.x;
966 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
967 ex = sel.nb.x;
968 if(tlinelen(y) < ex)
969 *ptr++ = '\n';
970 }
971 }
972 *ptr = 0;
973 return str;
974 }
975
976 void
977 selcopy(void) {
978 xsetsel(getsel());
979 }
980
981 void
982 selnotify(XEvent *e) {
983 ulong nitems, ofs, rem;
984 int format;
985 uchar *data, *last, *repl;
986 Atom type;
987
988 ofs = 0;
989 do {
990 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
991 False, AnyPropertyType, &type, &format,
992 &nitems, &rem, &data)) {
993 fprintf(stderr, "Clipboard allocation failed\n");
994 return;
995 }
996
997 /*
998 * As seen in getsel:
999 * Line endings are inconsistent in the terminal and GUI world
1000 * copy and pasting. When receiving some selection data,
1001 * replace all '\n' with '\r'.
1002 * FIXME: Fix the computer world.
1003 */
1004 repl = data;
1005 last = data + nitems * format / 8;
1006 while((repl = memchr(repl, '\n', last - repl))) {
1007 *repl++ = '\r';
1008 }
1009
1010 if(IS_SET(MODE_BRCKTPASTE))
1011 ttywrite("\033[200~", 6);
1012 ttysend((char *)data, nitems * format / 8);
1013 if(IS_SET(MODE_BRCKTPASTE))
1014 ttywrite("\033[201~", 6);
1015 XFree(data);
1016 /* number of 32-bit chunks returned */
1017 ofs += nitems * format / 32;
1018 } while(rem > 0);
1019 }
1020
1021 void
1022 selpaste(const Arg *dummy) {
1023 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1024 xw.win, CurrentTime);
1025 }
1026
1027 void
1028 clippaste(const Arg *dummy) {
1029 Atom clipboard;
1030
1031 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1032 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1033 xw.win, CurrentTime);
1034 }
1035
1036 void
1037 selclear(XEvent *e) {
1038 if(sel.ob.x == -1)
1039 return;
1040 sel.ob.x = -1;
1041 tsetdirt(sel.nb.y, sel.ne.y);
1042 }
1043
1044 void
1045 selrequest(XEvent *e) {
1046 XSelectionRequestEvent *xsre;
1047 XSelectionEvent xev;
1048 Atom xa_targets, string;
1049
1050 xsre = (XSelectionRequestEvent *) e;
1051 xev.type = SelectionNotify;
1052 xev.requestor = xsre->requestor;
1053 xev.selection = xsre->selection;
1054 xev.target = xsre->target;
1055 xev.time = xsre->time;
1056 /* reject */
1057 xev.property = None;
1058
1059 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1060 if(xsre->target == xa_targets) {
1061 /* respond with the supported type */
1062 string = sel.xtarget;
1063 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1064 XA_ATOM, 32, PropModeReplace,
1065 (uchar *) &string, 1);
1066 xev.property = xsre->property;
1067 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1068 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1069 xsre->target, 8, PropModeReplace,
1070 (uchar *) sel.clip, strlen(sel.clip));
1071 xev.property = xsre->property;
1072 }
1073
1074 /* all done, send a notification to the listener */
1075 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1076 fprintf(stderr, "Error sending SelectionNotify event\n");
1077 }
1078
1079 void
1080 xsetsel(char *str) {
1081 /* register the selection for both the clipboard and the primary */
1082 Atom clipboard;
1083
1084 free(sel.clip);
1085 sel.clip = str;
1086
1087 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1088
1089 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1090 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1091 }
1092
1093 void
1094 brelease(XEvent *e) {
1095 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1096 mousereport(e);
1097 return;
1098 }
1099
1100 if(e->xbutton.button == Button2) {
1101 selpaste(NULL);
1102 } else if(e->xbutton.button == Button1) {
1103 if(sel.mode < 2) {
1104 selclear(NULL);
1105 } else {
1106 getbuttoninfo(e);
1107 selcopy();
1108 }
1109 sel.mode = 0;
1110 tsetdirt(sel.nb.y, sel.ne.y);
1111 }
1112 }
1113
1114 void
1115 bmotion(XEvent *e) {
1116 int oldey, oldex, oldsby, oldsey;
1117
1118 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1119 mousereport(e);
1120 return;
1121 }
1122
1123 if(!sel.mode)
1124 return;
1125
1126 sel.mode++;
1127 oldey = sel.oe.y;
1128 oldex = sel.oe.x;
1129 oldsby = sel.nb.y;
1130 oldsey = sel.ne.y;
1131 getbuttoninfo(e);
1132
1133 if(oldey != sel.oe.y || oldex != sel.oe.x)
1134 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1135 }
1136
1137 void
1138 die(const char *errstr, ...) {
1139 va_list ap;
1140
1141 va_start(ap, errstr);
1142 vfprintf(stderr, errstr, ap);
1143 va_end(ap);
1144 exit(EXIT_FAILURE);
1145 }
1146
1147 void
1148 execsh(void) {
1149 char **args;
1150 char *envshell = getenv("SHELL");
1151 const struct passwd *pass = getpwuid(getuid());
1152 char buf[sizeof(long) * 8 + 1];
1153
1154 unsetenv("COLUMNS");
1155 unsetenv("LINES");
1156 unsetenv("TERMCAP");
1157
1158 if(pass) {
1159 setenv("LOGNAME", pass->pw_name, 1);
1160 setenv("USER", pass->pw_name, 1);
1161 setenv("SHELL", pass->pw_shell, 0);
1162 setenv("HOME", pass->pw_dir, 0);
1163 }
1164
1165 snprintf(buf, sizeof(buf), "%lu", xw.win);
1166 setenv("WINDOWID", buf, 1);
1167
1168 signal(SIGCHLD, SIG_DFL);
1169 signal(SIGHUP, SIG_DFL);
1170 signal(SIGINT, SIG_DFL);
1171 signal(SIGQUIT, SIG_DFL);
1172 signal(SIGTERM, SIG_DFL);
1173 signal(SIGALRM, SIG_DFL);
1174
1175 DEFAULT(envshell, shell);
1176 setenv("TERM", termname, 1);
1177 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1178 execvp(args[0], args);
1179 exit(EXIT_FAILURE);
1180 }
1181
1182 void
1183 sigchld(int a) {
1184 int stat = 0;
1185
1186 if(waitpid(pid, &stat, 0) < 0)
1187 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1188
1189 if(WIFEXITED(stat)) {
1190 exit(WEXITSTATUS(stat));
1191 } else {
1192 exit(EXIT_FAILURE);
1193 }
1194 }
1195
1196 void
1197 ttynew(void) {
1198 int m, s;
1199 struct winsize w = {term.row, term.col, 0, 0};
1200
1201 /* seems to work fine on linux, openbsd and freebsd */
1202 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1203 die("openpty failed: %s\n", strerror(errno));
1204
1205 switch(pid = fork()) {
1206 case -1:
1207 die("fork failed\n");
1208 break;
1209 case 0:
1210 setsid(); /* create a new process group */
1211 dup2(s, STDIN_FILENO);
1212 dup2(s, STDOUT_FILENO);
1213 dup2(s, STDERR_FILENO);
1214 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1215 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1216 close(s);
1217 close(m);
1218 execsh();
1219 break;
1220 default:
1221 close(s);
1222 cmdfd = m;
1223 signal(SIGCHLD, sigchld);
1224 if(opt_io) {
1225 term.mode |= MODE_PRINT;
1226 iofd = (!strcmp(opt_io, "-")) ?
1227 STDOUT_FILENO :
1228 open(opt_io, O_WRONLY | O_CREAT, 0666);
1229 if(iofd < 0) {
1230 fprintf(stderr, "Error opening %s:%s\n",
1231 opt_io, strerror(errno));
1232 }
1233 }
1234 break;
1235 }
1236 }
1237
1238 void
1239 ttyread(void) {
1240 static char buf[BUFSIZ];
1241 static int buflen = 0;
1242 char *ptr;
1243 char s[UTF_SIZ];
1244 int charsize; /* size of utf8 char in bytes */
1245 long unicodep;
1246 int ret;
1247
1248 /* append read bytes to unprocessed bytes */
1249 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1250 die("Couldn't read from shell: %s\n", strerror(errno));
1251
1252 /* process every complete utf8 char */
1253 buflen += ret;
1254 ptr = buf;
1255 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1256 utf8encode(unicodep, s, UTF_SIZ);
1257 tputc(s, charsize);
1258 ptr += charsize;
1259 buflen -= charsize;
1260 }
1261
1262 /* keep any uncomplete utf8 char for the next call */
1263 memmove(buf, ptr, buflen);
1264 }
1265
1266 void
1267 ttywrite(const char *s, size_t n) {
1268 if(xwrite(cmdfd, s, n) == -1)
1269 die("write error on tty: %s\n", strerror(errno));
1270 }
1271
1272 void
1273 ttysend(char *s, size_t n) {
1274 ttywrite(s, n);
1275 if(IS_SET(MODE_ECHO))
1276 techo(s, n);
1277 }
1278
1279 void
1280 ttyresize(void) {
1281 struct winsize w;
1282
1283 w.ws_row = term.row;
1284 w.ws_col = term.col;
1285 w.ws_xpixel = xw.tw;
1286 w.ws_ypixel = xw.th;
1287 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1288 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1289 }
1290
1291 int
1292 tattrset(int attr) {
1293 int i, j;
1294
1295 for(i = 0; i < term.row-1; i++) {
1296 for(j = 0; j < term.col-1; j++) {
1297 if(term.line[i][j].mode & attr)
1298 return 1;
1299 }
1300 }
1301
1302 return 0;
1303 }
1304
1305 void
1306 tsetdirt(int top, int bot) {
1307 int i;
1308
1309 LIMIT(top, 0, term.row-1);
1310 LIMIT(bot, 0, term.row-1);
1311
1312 for(i = top; i <= bot; i++)
1313 term.dirty[i] = 1;
1314 }
1315
1316 void
1317 tsetdirtattr(int attr) {
1318 int i, j;
1319
1320 for(i = 0; i < term.row-1; i++) {
1321 for(j = 0; j < term.col-1; j++) {
1322 if(term.line[i][j].mode & attr) {
1323 tsetdirt(i, i);
1324 break;
1325 }
1326 }
1327 }
1328 }
1329
1330 void
1331 tfulldirt(void) {
1332 tsetdirt(0, term.row-1);
1333 }
1334
1335 void
1336 tcursor(int mode) {
1337 static TCursor c[2];
1338 bool alt = IS_SET(MODE_ALTSCREEN);
1339
1340 if(mode == CURSOR_SAVE) {
1341 c[alt] = term.c;
1342 } else if(mode == CURSOR_LOAD) {
1343 term.c = c[alt];
1344 tmoveto(c[alt].x, c[alt].y);
1345 }
1346 }
1347
1348 void
1349 treset(void) {
1350 uint i;
1351
1352 term.c = (TCursor){{
1353 .mode = ATTR_NULL,
1354 .fg = defaultfg,
1355 .bg = defaultbg
1356 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1357
1358 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1359 for(i = tabspaces; i < term.col; i += tabspaces)
1360 term.tabs[i] = 1;
1361 term.top = 0;
1362 term.bot = term.row - 1;
1363 term.mode = MODE_WRAP;
1364 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1365 term.charset = 0;
1366
1367 tclearregion(0, 0, term.col-1, term.row-1);
1368 tmoveto(0, 0);
1369 tcursor(CURSOR_SAVE);
1370 }
1371
1372 void
1373 tnew(int col, int row) {
1374 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1375 tresize(col, row);
1376 term.numlock = 1;
1377
1378 treset();
1379 }
1380
1381 void
1382 tswapscreen(void) {
1383 Line *tmp = term.line;
1384
1385 term.line = term.alt;
1386 term.alt = tmp;
1387 term.mode ^= MODE_ALTSCREEN;
1388 tfulldirt();
1389 }
1390
1391 void
1392 tscrolldown(int orig, int n) {
1393 int i;
1394 Line temp;
1395
1396 LIMIT(n, 0, term.bot-orig+1);
1397
1398 tsetdirt(orig, term.bot-n);
1399 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1400
1401 for(i = term.bot; i >= orig+n; i--) {
1402 temp = term.line[i];
1403 term.line[i] = term.line[i-n];
1404 term.line[i-n] = temp;
1405 }
1406
1407 selscroll(orig, n);
1408 }
1409
1410 void
1411 tscrollup(int orig, int n) {
1412 int i;
1413 Line temp;
1414
1415 LIMIT(n, 0, term.bot-orig+1);
1416
1417 tclearregion(0, orig, term.col-1, orig+n-1);
1418 tsetdirt(orig+n, term.bot);
1419
1420 for(i = orig; i <= term.bot-n; i++) {
1421 temp = term.line[i];
1422 term.line[i] = term.line[i+n];
1423 term.line[i+n] = temp;
1424 }
1425
1426 selscroll(orig, -n);
1427 }
1428
1429 void
1430 selscroll(int orig, int n) {
1431 if(sel.ob.x == -1)
1432 return;
1433
1434 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1435 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1436 selclear(NULL);
1437 return;
1438 }
1439 if(sel.type == SEL_RECTANGULAR) {
1440 if(sel.ob.y < term.top)
1441 sel.ob.y = term.top;
1442 if(sel.oe.y > term.bot)
1443 sel.oe.y = term.bot;
1444 } else {
1445 if(sel.ob.y < term.top) {
1446 sel.ob.y = term.top;
1447 sel.ob.x = 0;
1448 }
1449 if(sel.oe.y > term.bot) {
1450 sel.oe.y = term.bot;
1451 sel.oe.x = term.col;
1452 }
1453 }
1454 selnormalize();
1455 }
1456 }
1457
1458 void
1459 tnewline(int first_col) {
1460 int y = term.c.y;
1461
1462 if(y == term.bot) {
1463 tscrollup(term.top, 1);
1464 } else {
1465 y++;
1466 }
1467 tmoveto(first_col ? 0 : term.c.x, y);
1468 }
1469
1470 void
1471 csiparse(void) {
1472 char *p = csiescseq.buf, *np;
1473 long int v;
1474
1475 csiescseq.narg = 0;
1476 if(*p == '?') {
1477 csiescseq.priv = 1;
1478 p++;
1479 }
1480
1481 csiescseq.buf[csiescseq.len] = '\0';
1482 while(p < csiescseq.buf+csiescseq.len) {
1483 np = NULL;
1484 v = strtol(p, &np, 10);
1485 if(np == p)
1486 v = 0;
1487 if(v == LONG_MAX || v == LONG_MIN)
1488 v = -1;
1489 csiescseq.arg[csiescseq.narg++] = v;
1490 p = np;
1491 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1492 break;
1493 p++;
1494 }
1495 csiescseq.mode = *p;
1496 }
1497
1498 /* for absolute user moves, when decom is set */
1499 void
1500 tmoveato(int x, int y) {
1501 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1502 }
1503
1504 void
1505 tmoveto(int x, int y) {
1506 int miny, maxy;
1507
1508 if(term.c.state & CURSOR_ORIGIN) {
1509 miny = term.top;
1510 maxy = term.bot;
1511 } else {
1512 miny = 0;
1513 maxy = term.row - 1;
1514 }
1515 LIMIT(x, 0, term.col-1);
1516 LIMIT(y, miny, maxy);
1517 term.c.state &= ~CURSOR_WRAPNEXT;
1518 term.c.x = x;
1519 term.c.y = y;
1520 }
1521
1522 void
1523 tsetchar(char *c, Glyph *attr, int x, int y) {
1524 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1525 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1526 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1527 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1528 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1529 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1530 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1531 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1532 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1533 };
1534
1535 /*
1536 * The table is proudly stolen from rxvt.
1537 */
1538 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1539 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1540 c = vt100_0[c[0] - 0x41];
1541 }
1542 }
1543
1544 if(term.line[y][x].mode & ATTR_WIDE) {
1545 if(x+1 < term.col) {
1546 term.line[y][x+1].c[0] = ' ';
1547 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1548 }
1549 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1550 term.line[y][x-1].c[0] = ' ';
1551 term.line[y][x-1].mode &= ~ATTR_WIDE;
1552 }
1553
1554 term.dirty[y] = 1;
1555 term.line[y][x] = *attr;
1556 memcpy(term.line[y][x].c, c, UTF_SIZ);
1557 }
1558
1559 void
1560 tclearregion(int x1, int y1, int x2, int y2) {
1561 int x, y, temp;
1562
1563 if(x1 > x2)
1564 temp = x1, x1 = x2, x2 = temp;
1565 if(y1 > y2)
1566 temp = y1, y1 = y2, y2 = temp;
1567
1568 LIMIT(x1, 0, term.col-1);
1569 LIMIT(x2, 0, term.col-1);
1570 LIMIT(y1, 0, term.row-1);
1571 LIMIT(y2, 0, term.row-1);
1572
1573 for(y = y1; y <= y2; y++) {
1574 term.dirty[y] = 1;
1575 for(x = x1; x <= x2; x++) {
1576 if(selected(x, y))
1577 selclear(NULL);
1578 term.line[y][x] = term.c.attr;
1579 memcpy(term.line[y][x].c, " ", 2);
1580 }
1581 }
1582 }
1583
1584 void
1585 tdeletechar(int n) {
1586 int dst, src, size;
1587 Glyph *line;
1588
1589 LIMIT(n, 0, term.col - term.c.x);
1590
1591 dst = term.c.x;
1592 src = term.c.x + n;
1593 size = term.col - src;
1594 line = term.line[term.c.y];
1595
1596 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1597 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1598 }
1599
1600 void
1601 tinsertblank(int n) {
1602 int dst, src, size;
1603 Glyph *line;
1604
1605 LIMIT(n, 0, term.col - term.c.x);
1606
1607 dst = term.c.x + n;
1608 src = term.c.x;
1609 size = term.col - dst;
1610 line = term.line[term.c.y];
1611
1612 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1613 tclearregion(src, term.c.y, dst - 1, term.c.y);
1614 }
1615
1616 void
1617 tinsertblankline(int n) {
1618 if(BETWEEN(term.c.y, term.top, term.bot))
1619 tscrolldown(term.c.y, n);
1620 }
1621
1622 void
1623 tdeleteline(int n) {
1624 if(BETWEEN(term.c.y, term.top, term.bot))
1625 tscrollup(term.c.y, n);
1626 }
1627
1628 int32_t
1629 tdefcolor(int *attr, int *npar, int l) {
1630 int32_t idx = -1;
1631 uint r, g, b;
1632
1633 switch (attr[*npar + 1]) {
1634 case 2: /* direct color in RGB space */
1635 if (*npar + 4 >= l) {
1636 fprintf(stderr,
1637 "erresc(38): Incorrect number of parameters (%d)\n",
1638 *npar);
1639 break;
1640 }
1641 r = attr[*npar + 2];
1642 g = attr[*npar + 3];
1643 b = attr[*npar + 4];
1644 *npar += 4;
1645 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1646 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1647 r, g, b);
1648 else
1649 idx = TRUECOLOR(r, g, b);
1650 break;
1651 case 5: /* indexed color */
1652 if (*npar + 2 >= l) {
1653 fprintf(stderr,
1654 "erresc(38): Incorrect number of parameters (%d)\n",
1655 *npar);
1656 break;
1657 }
1658 *npar += 2;
1659 if(!BETWEEN(attr[*npar], 0, 255))
1660 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1661 else
1662 idx = attr[*npar];
1663 break;
1664 case 0: /* implemented defined (only foreground) */
1665 case 1: /* transparent */
1666 case 3: /* direct color in CMY space */
1667 case 4: /* direct color in CMYK space */
1668 default:
1669 fprintf(stderr,
1670 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1671 break;
1672 }
1673
1674 return idx;
1675 }
1676
1677 void
1678 tsetattr(int *attr, int l) {
1679 int i;
1680 int32_t idx;
1681
1682 for(i = 0; i < l; i++) {
1683 switch(attr[i]) {
1684 case 0:
1685 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1686 | ATTR_BOLD | ATTR_ITALIC \
1687 | ATTR_BLINK);
1688 term.c.attr.fg = defaultfg;
1689 term.c.attr.bg = defaultbg;
1690 break;
1691 case 1:
1692 term.c.attr.mode |= ATTR_BOLD;
1693 break;
1694 case 3:
1695 term.c.attr.mode |= ATTR_ITALIC;
1696 break;
1697 case 4:
1698 term.c.attr.mode |= ATTR_UNDERLINE;
1699 break;
1700 case 5: /* slow blink */
1701 case 6: /* rapid blink */
1702 term.c.attr.mode |= ATTR_BLINK;
1703 break;
1704 case 7:
1705 term.c.attr.mode |= ATTR_REVERSE;
1706 break;
1707 case 21:
1708 case 22:
1709 term.c.attr.mode &= ~ATTR_BOLD;
1710 break;
1711 case 23:
1712 term.c.attr.mode &= ~ATTR_ITALIC;
1713 break;
1714 case 24:
1715 term.c.attr.mode &= ~ATTR_UNDERLINE;
1716 break;
1717 case 25:
1718 case 26:
1719 term.c.attr.mode &= ~ATTR_BLINK;
1720 break;
1721 case 27:
1722 term.c.attr.mode &= ~ATTR_REVERSE;
1723 break;
1724 case 38:
1725 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1726 term.c.attr.fg = idx;
1727 break;
1728 case 39:
1729 term.c.attr.fg = defaultfg;
1730 break;
1731 case 48:
1732 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1733 term.c.attr.bg = idx;
1734 break;
1735 case 49:
1736 term.c.attr.bg = defaultbg;
1737 break;
1738 default:
1739 if(BETWEEN(attr[i], 30, 37)) {
1740 term.c.attr.fg = attr[i] - 30;
1741 } else if(BETWEEN(attr[i], 40, 47)) {
1742 term.c.attr.bg = attr[i] - 40;
1743 } else if(BETWEEN(attr[i], 90, 97)) {
1744 term.c.attr.fg = attr[i] - 90 + 8;
1745 } else if(BETWEEN(attr[i], 100, 107)) {
1746 term.c.attr.bg = attr[i] - 100 + 8;
1747 } else {
1748 fprintf(stderr,
1749 "erresc(default): gfx attr %d unknown\n",
1750 attr[i]), csidump();
1751 }
1752 break;
1753 }
1754 }
1755 }
1756
1757 void
1758 tsetscroll(int t, int b) {
1759 int temp;
1760
1761 LIMIT(t, 0, term.row-1);
1762 LIMIT(b, 0, term.row-1);
1763 if(t > b) {
1764 temp = t;
1765 t = b;
1766 b = temp;
1767 }
1768 term.top = t;
1769 term.bot = b;
1770 }
1771
1772 void
1773 tsetmode(bool priv, bool set, int *args, int narg) {
1774 int *lim, mode;
1775 bool alt;
1776
1777 for(lim = args + narg; args < lim; ++args) {
1778 if(priv) {
1779 switch(*args) {
1780 case 1: /* DECCKM -- Cursor key */
1781 MODBIT(term.mode, set, MODE_APPCURSOR);
1782 break;
1783 case 5: /* DECSCNM -- Reverse video */
1784 mode = term.mode;
1785 MODBIT(term.mode, set, MODE_REVERSE);
1786 if(mode != term.mode)
1787 redraw(REDRAW_TIMEOUT);
1788 break;
1789 case 6: /* DECOM -- Origin */
1790 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1791 tmoveato(0, 0);
1792 break;
1793 case 7: /* DECAWM -- Auto wrap */
1794 MODBIT(term.mode, set, MODE_WRAP);
1795 break;
1796 case 0: /* Error (IGNORED) */
1797 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1798 case 3: /* DECCOLM -- Column (IGNORED) */
1799 case 4: /* DECSCLM -- Scroll (IGNORED) */
1800 case 8: /* DECARM -- Auto repeat (IGNORED) */
1801 case 18: /* DECPFF -- Printer feed (IGNORED) */
1802 case 19: /* DECPEX -- Printer extent (IGNORED) */
1803 case 42: /* DECNRCM -- National characters (IGNORED) */
1804 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1805 break;
1806 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1807 MODBIT(term.mode, !set, MODE_HIDE);
1808 break;
1809 case 9: /* X10 mouse compatibility mode */
1810 xsetpointermotion(0);
1811 MODBIT(term.mode, 0, MODE_MOUSE);
1812 MODBIT(term.mode, set, MODE_MOUSEX10);
1813 break;
1814 case 1000: /* 1000: report button press */
1815 xsetpointermotion(0);
1816 MODBIT(term.mode, 0, MODE_MOUSE);
1817 MODBIT(term.mode, set, MODE_MOUSEBTN);
1818 break;
1819 case 1002: /* 1002: report motion on button press */
1820 xsetpointermotion(0);
1821 MODBIT(term.mode, 0, MODE_MOUSE);
1822 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1823 break;
1824 case 1003: /* 1003: enable all mouse motions */
1825 xsetpointermotion(set);
1826 MODBIT(term.mode, 0, MODE_MOUSE);
1827 MODBIT(term.mode, set, MODE_MOUSEMANY);
1828 break;
1829 case 1004: /* 1004: send focus events to tty */
1830 MODBIT(term.mode, set, MODE_FOCUS);
1831 break;
1832 case 1006: /* 1006: extended reporting mode */
1833 MODBIT(term.mode, set, MODE_MOUSESGR);
1834 break;
1835 case 1034:
1836 MODBIT(term.mode, set, MODE_8BIT);
1837 break;
1838 case 1049: /* swap screen & set/restore cursor as xterm */
1839 if (!allowaltscreen)
1840 break;
1841 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1842 /* FALLTHROUGH */
1843 case 47: /* swap screen */
1844 case 1047:
1845 if (!allowaltscreen)
1846 break;
1847 alt = IS_SET(MODE_ALTSCREEN);
1848 if(alt) {
1849 tclearregion(0, 0, term.col-1,
1850 term.row-1);
1851 }
1852 if(set ^ alt) /* set is always 1 or 0 */
1853 tswapscreen();
1854 if(*args != 1049)
1855 break;
1856 /* FALLTHROUGH */
1857 case 1048:
1858 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1859 break;
1860 case 2004: /* 2004: bracketed paste mode */
1861 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1862 break;
1863 /* Not implemented mouse modes. See comments there. */
1864 case 1001: /* mouse highlight mode; can hang the
1865 terminal by design when implemented. */
1866 case 1005: /* UTF-8 mouse mode; will confuse
1867 applications not supporting UTF-8
1868 and luit. */
1869 case 1015: /* urxvt mangled mouse mode; incompatible
1870 and can be mistaken for other control
1871 codes. */
1872 default:
1873 fprintf(stderr,
1874 "erresc: unknown private set/reset mode %d\n",
1875 *args);
1876 break;
1877 }
1878 } else {
1879 switch(*args) {
1880 case 0: /* Error (IGNORED) */
1881 break;
1882 case 2: /* KAM -- keyboard action */
1883 MODBIT(term.mode, set, MODE_KBDLOCK);
1884 break;
1885 case 4: /* IRM -- Insertion-replacement */
1886 MODBIT(term.mode, set, MODE_INSERT);
1887 break;
1888 case 12: /* SRM -- Send/Receive */
1889 MODBIT(term.mode, !set, MODE_ECHO);
1890 break;
1891 case 20: /* LNM -- Linefeed/new line */
1892 MODBIT(term.mode, set, MODE_CRLF);
1893 break;
1894 default:
1895 fprintf(stderr,
1896 "erresc: unknown set/reset mode %d\n",
1897 *args);
1898 break;
1899 }
1900 }
1901 }
1902 }
1903
1904 void
1905 csihandle(void) {
1906 char buf[40];
1907 int len;
1908
1909 switch(csiescseq.mode) {
1910 default:
1911 unknown:
1912 fprintf(stderr, "erresc: unknown csi ");
1913 csidump();
1914 /* die(""); */
1915 break;
1916 case '@': /* ICH -- Insert <n> blank char */
1917 DEFAULT(csiescseq.arg[0], 1);
1918 tinsertblank(csiescseq.arg[0]);
1919 break;
1920 case 'A': /* CUU -- Cursor <n> Up */
1921 DEFAULT(csiescseq.arg[0], 1);
1922 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1923 break;
1924 case 'B': /* CUD -- Cursor <n> Down */
1925 case 'e': /* VPR --Cursor <n> Down */
1926 DEFAULT(csiescseq.arg[0], 1);
1927 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1928 break;
1929 case 'i': /* MC -- Media Copy */
1930 switch(csiescseq.arg[0]) {
1931 case 0:
1932 tdump();
1933 break;
1934 case 1:
1935 tdumpline(term.c.y);
1936 break;
1937 case 2:
1938 tdumpsel();
1939 break;
1940 case 4:
1941 term.mode &= ~MODE_PRINT;
1942 break;
1943 case 5:
1944 term.mode |= MODE_PRINT;
1945 break;
1946 }
1947 break;
1948 case 'c': /* DA -- Device Attributes */
1949 if(csiescseq.arg[0] == 0)
1950 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1951 break;
1952 case 'C': /* CUF -- Cursor <n> Forward */
1953 case 'a': /* HPR -- Cursor <n> Forward */
1954 DEFAULT(csiescseq.arg[0], 1);
1955 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1956 break;
1957 case 'D': /* CUB -- Cursor <n> Backward */
1958 DEFAULT(csiescseq.arg[0], 1);
1959 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1960 break;
1961 case 'E': /* CNL -- Cursor <n> Down and first col */
1962 DEFAULT(csiescseq.arg[0], 1);
1963 tmoveto(0, term.c.y+csiescseq.arg[0]);
1964 break;
1965 case 'F': /* CPL -- Cursor <n> Up and first col */
1966 DEFAULT(csiescseq.arg[0], 1);
1967 tmoveto(0, term.c.y-csiescseq.arg[0]);
1968 break;
1969 case 'g': /* TBC -- Tabulation clear */
1970 switch(csiescseq.arg[0]) {
1971 case 0: /* clear current tab stop */
1972 term.tabs[term.c.x] = 0;
1973 break;
1974 case 3: /* clear all the tabs */
1975 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1976 break;
1977 default:
1978 goto unknown;
1979 }
1980 break;
1981 case 'G': /* CHA -- Move to <col> */
1982 case '`': /* HPA */
1983 DEFAULT(csiescseq.arg[0], 1);
1984 tmoveto(csiescseq.arg[0]-1, term.c.y);
1985 break;
1986 case 'H': /* CUP -- Move to <row> <col> */
1987 case 'f': /* HVP */
1988 DEFAULT(csiescseq.arg[0], 1);
1989 DEFAULT(csiescseq.arg[1], 1);
1990 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1991 break;
1992 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1993 DEFAULT(csiescseq.arg[0], 1);
1994 tputtab(csiescseq.arg[0]);
1995 break;
1996 case 'J': /* ED -- Clear screen */
1997 selclear(NULL);
1998 switch(csiescseq.arg[0]) {
1999 case 0: /* below */
2000 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2001 if(term.c.y < term.row-1) {
2002 tclearregion(0, term.c.y+1, term.col-1,
2003 term.row-1);
2004 }
2005 break;
2006 case 1: /* above */
2007 if(term.c.y > 1)
2008 tclearregion(0, 0, term.col-1, term.c.y-1);
2009 tclearregion(0, term.c.y, term.c.x, term.c.y);
2010 break;
2011 case 2: /* all */
2012 tclearregion(0, 0, term.col-1, term.row-1);
2013 break;
2014 default:
2015 goto unknown;
2016 }
2017 break;
2018 case 'K': /* EL -- Clear line */
2019 switch(csiescseq.arg[0]) {
2020 case 0: /* right */
2021 tclearregion(term.c.x, term.c.y, term.col-1,
2022 term.c.y);
2023 break;
2024 case 1: /* left */
2025 tclearregion(0, term.c.y, term.c.x, term.c.y);
2026 break;
2027 case 2: /* all */
2028 tclearregion(0, term.c.y, term.col-1, term.c.y);
2029 break;
2030 }
2031 break;
2032 case 'S': /* SU -- Scroll <n> line up */
2033 DEFAULT(csiescseq.arg[0], 1);
2034 tscrollup(term.top, csiescseq.arg[0]);
2035 break;
2036 case 'T': /* SD -- Scroll <n> line down */
2037 DEFAULT(csiescseq.arg[0], 1);
2038 tscrolldown(term.top, csiescseq.arg[0]);
2039 break;
2040 case 'L': /* IL -- Insert <n> blank lines */
2041 DEFAULT(csiescseq.arg[0], 1);
2042 tinsertblankline(csiescseq.arg[0]);
2043 break;
2044 case 'l': /* RM -- Reset Mode */
2045 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2046 break;
2047 case 'M': /* DL -- Delete <n> lines */
2048 DEFAULT(csiescseq.arg[0], 1);
2049 tdeleteline(csiescseq.arg[0]);
2050 break;
2051 case 'X': /* ECH -- Erase <n> char */
2052 DEFAULT(csiescseq.arg[0], 1);
2053 tclearregion(term.c.x, term.c.y,
2054 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2055 break;
2056 case 'P': /* DCH -- Delete <n> char */
2057 DEFAULT(csiescseq.arg[0], 1);
2058 tdeletechar(csiescseq.arg[0]);
2059 break;
2060 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2061 DEFAULT(csiescseq.arg[0], 1);
2062 tputtab(-csiescseq.arg[0]);
2063 break;
2064 case 'd': /* VPA -- Move to <row> */
2065 DEFAULT(csiescseq.arg[0], 1);
2066 tmoveato(term.c.x, csiescseq.arg[0]-1);
2067 break;
2068 case 'h': /* SM -- Set terminal mode */
2069 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2070 break;
2071 case 'm': /* SGR -- Terminal attribute (color) */
2072 tsetattr(csiescseq.arg, csiescseq.narg);
2073 break;
2074 case 'n': /* DSR – Device Status Report (cursor position) */
2075 if (csiescseq.arg[0] == 6) {
2076 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2077 term.c.y+1, term.c.x+1);
2078 ttywrite(buf, len);
2079 }
2080 break;
2081 case 'r': /* DECSTBM -- Set Scrolling Region */
2082 if(csiescseq.priv) {
2083 goto unknown;
2084 } else {
2085 DEFAULT(csiescseq.arg[0], 1);
2086 DEFAULT(csiescseq.arg[1], term.row);
2087 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2088 tmoveato(0, 0);
2089 }
2090 break;
2091 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2092 tcursor(CURSOR_SAVE);
2093 break;
2094 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2095 tcursor(CURSOR_LOAD);
2096 break;
2097 }
2098 }
2099
2100 void
2101 csidump(void) {
2102 int i;
2103 uint c;
2104
2105 printf("ESC[");
2106 for(i = 0; i < csiescseq.len; i++) {
2107 c = csiescseq.buf[i] & 0xff;
2108 if(isprint(c)) {
2109 putchar(c);
2110 } else if(c == '\n') {
2111 printf("(\\n)");
2112 } else if(c == '\r') {
2113 printf("(\\r)");
2114 } else if(c == 0x1b) {
2115 printf("(\\e)");
2116 } else {
2117 printf("(%02x)", c);
2118 }
2119 }
2120 putchar('\n');
2121 }
2122
2123 void
2124 csireset(void) {
2125 memset(&csiescseq, 0, sizeof(csiescseq));
2126 }
2127
2128 void
2129 strhandle(void) {
2130 char *p = NULL;
2131 int j, narg, par;
2132
2133 term.esc &= ~(ESC_STR_END|ESC_STR);
2134 strparse();
2135 narg = strescseq.narg;
2136 par = atoi(strescseq.args[0]);
2137
2138 switch(strescseq.type) {
2139 case ']': /* OSC -- Operating System Command */
2140 switch(par) {
2141 case 0:
2142 case 1:
2143 case 2:
2144 if(narg > 1)
2145 xsettitle(strescseq.args[1]);
2146 return;
2147 case 4: /* color set */
2148 if(narg < 3)
2149 break;
2150 p = strescseq.args[2];
2151 /* FALLTHROUGH */
2152 case 104: /* color reset, here p = NULL */
2153 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2154 if(xsetcolorname(j, p)) {
2155 fprintf(stderr, "erresc: invalid color %s\n", p);
2156 } else {
2157 /*
2158 * TODO if defaultbg color is changed, borders
2159 * are dirty
2160 */
2161 redraw(0);
2162 }
2163 return;
2164 }
2165 break;
2166 case 'k': /* old title set compatibility */
2167 xsettitle(strescseq.args[0]);
2168 return;
2169 case 'P': /* DCS -- Device Control String */
2170 case '_': /* APC -- Application Program Command */
2171 case '^': /* PM -- Privacy Message */
2172 return;
2173 }
2174
2175 fprintf(stderr, "erresc: unknown str ");
2176 strdump();
2177 }
2178
2179 void
2180 strparse(void) {
2181 char *p = strescseq.buf;
2182
2183 strescseq.narg = 0;
2184 strescseq.buf[strescseq.len] = '\0';
2185 while(p && strescseq.narg < STR_ARG_SIZ)
2186 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2187 }
2188
2189 void
2190 strdump(void) {
2191 int i;
2192 uint c;
2193
2194 printf("ESC%c", strescseq.type);
2195 for(i = 0; i < strescseq.len; i++) {
2196 c = strescseq.buf[i] & 0xff;
2197 if(c == '\0') {
2198 return;
2199 } else if(isprint(c)) {
2200 putchar(c);
2201 } else if(c == '\n') {
2202 printf("(\\n)");
2203 } else if(c == '\r') {
2204 printf("(\\r)");
2205 } else if(c == 0x1b) {
2206 printf("(\\e)");
2207 } else {
2208 printf("(%02x)", c);
2209 }
2210 }
2211 printf("ESC\\\n");
2212 }
2213
2214 void
2215 strreset(void) {
2216 memset(&strescseq, 0, sizeof(strescseq));
2217 }
2218
2219 void
2220 tprinter(char *s, size_t len) {
2221 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2222 fprintf(stderr, "Error writing in %s:%s\n",
2223 opt_io, strerror(errno));
2224 close(iofd);
2225 iofd = -1;
2226 }
2227 }
2228
2229 void
2230 toggleprinter(const Arg *arg) {
2231 term.mode ^= MODE_PRINT;
2232 }
2233
2234 void
2235 printscreen(const Arg *arg) {
2236 tdump();
2237 }
2238
2239 void
2240 printsel(const Arg *arg) {
2241 tdumpsel();
2242 }
2243
2244 void
2245 tdumpsel(void) {
2246 char *ptr;
2247
2248 if((ptr = getsel())) {
2249 tprinter(ptr, strlen(ptr));
2250 free(ptr);
2251 }
2252 }
2253
2254 void
2255 tdumpline(int n) {
2256 Glyph *bp, *end;
2257
2258 bp = &term.line[n][0];
2259 end = &bp[term.col-1];
2260 while(end > bp && !strcmp(" ", end->c))
2261 --end;
2262 if(bp != end || strcmp(bp->c, " ")) {
2263 for( ;bp <= end; ++bp)
2264 tprinter(bp->c, strlen(bp->c));
2265 }
2266 tprinter("\n", 1);
2267 }
2268
2269 void
2270 tdump(void) {
2271 int i;
2272
2273 for(i = 0; i < term.row; ++i)
2274 tdumpline(i);
2275 }
2276
2277 void
2278 tputtab(int n) {
2279 uint x = term.c.x;
2280
2281 if(n > 0) {
2282 while(x < term.col && n--)
2283 for(++x; x < term.col && !term.tabs[x]; ++x)
2284 /* nothing */ ;
2285 } else if(n < 0) {
2286 while(x > 0 && n++)
2287 for(--x; x > 0 && !term.tabs[x]; --x)
2288 /* nothing */ ;
2289 }
2290 tmoveto(x, term.c.y);
2291 }
2292
2293 void
2294 techo(char *buf, int len) {
2295 for(; len > 0; buf++, len--) {
2296 char c = *buf;
2297
2298 if(ISCONTROL(c)) { /* control code */
2299 if(c & 0x80) {
2300 c &= 0x7f;
2301 tputc("^", 1);
2302 tputc("[", 1);
2303 } else if(c != '\n' && c != '\r' && c != '\t') {
2304 c ^= '\x40';
2305 tputc("^", 1);
2306 }
2307 tputc(&c, 1);
2308 } else {
2309 break;
2310 }
2311 }
2312 if(len)
2313 tputc(buf, len);
2314 }
2315
2316 void
2317 tdeftran(char ascii) {
2318 static char cs[] = "0B";
2319 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2320 char *p;
2321
2322 if((p = strchr(cs, ascii)) == NULL) {
2323 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2324 } else {
2325 term.trantbl[term.icharset] = vcs[p - cs];
2326 }
2327 }
2328
2329 void
2330 tcontrolcode(uchar ascii) {
2331 static char question[UTF_SIZ] = "?";
2332
2333 switch(ascii) {
2334 case '\t': /* HT */
2335 tputtab(1);
2336 return;
2337 case '\b': /* BS */
2338 tmoveto(term.c.x-1, term.c.y);
2339 return;
2340 case '\r': /* CR */
2341 tmoveto(0, term.c.y);
2342 return;
2343 case '\f': /* LF */
2344 case '\v': /* VT */
2345 case '\n': /* LF */
2346 /* go to first col if the mode is set */
2347 tnewline(IS_SET(MODE_CRLF));
2348 return;
2349 case '\a': /* BEL */
2350 if(term.esc & ESC_STR_END) {
2351 /* backwards compatibility to xterm */
2352 strhandle();
2353 } else {
2354 if(!(xw.state & WIN_FOCUSED))
2355 xseturgency(1);
2356 if (bellvolume)
2357 XBell(xw.dpy, bellvolume);
2358 }
2359 break;
2360 case '\033': /* ESC */
2361 csireset();
2362 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2363 term.esc |= ESC_START;
2364 return;
2365 case '\016': /* SO */
2366 term.charset = 0;
2367 return;
2368 case '\017': /* SI */
2369 term.charset = 1;
2370 return;
2371 case '\032': /* SUB */
2372 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2373 case '\030': /* CAN */
2374 csireset();
2375 break;
2376 case '\005': /* ENQ (IGNORED) */
2377 case '\000': /* NUL (IGNORED) */
2378 case '\021': /* XON (IGNORED) */
2379 case '\023': /* XOFF (IGNORED) */
2380 case 0177: /* DEL (IGNORED) */
2381 return;
2382 case 0x84: /* TODO: IND */
2383 case 0x85: /* TODO: NEL */
2384 case 0x88: /* TODO: HTS */
2385 case 0x8d: /* TODO: RI */
2386 case 0x8e: /* TODO: SS2 */
2387 case 0x8f: /* TODO: SS3 */
2388 case 0x90: /* TODO: DCS */
2389 case 0x98: /* TODO: SOS */
2390 case 0x9a: /* TODO: DECID */
2391 case 0x9b: /* TODO: CSI */
2392 case 0x9c: /* TODO: ST */
2393 case 0x9d: /* TODO: OSC */
2394 case 0x9e: /* TODO: PM */
2395 case 0x9f: /* TODO: APC */
2396 break;
2397 }
2398 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2399 term.esc &= ~(ESC_STR_END|ESC_STR);
2400 return;
2401 }
2402
2403 void
2404 tdectest(char c) {
2405 static char E[UTF_SIZ] = "E";
2406 int x, y;
2407
2408 if(c == '8') { /* DEC screen alignment test. */
2409 for(x = 0; x < term.col; ++x) {
2410 for(y = 0; y < term.row; ++y)
2411 tsetchar(E, &term.c.attr, x, y);
2412 }
2413 }
2414 }
2415
2416 void
2417 tputc(char *c, int len) {
2418 uchar ascii;
2419 bool control;
2420 long unicodep;
2421 int width;
2422 Glyph *gp;
2423
2424 if(len == 1) {
2425 width = 1;
2426 unicodep = ascii = *c;
2427 } else {
2428 utf8decode(c, &unicodep, UTF_SIZ);
2429 width = wcwidth(unicodep);
2430 control = ISCONTROLC1(unicodep);
2431 ascii = unicodep;
2432 }
2433
2434 if(IS_SET(MODE_PRINT))
2435 tprinter(c, len);
2436 control = ISCONTROL(unicodep);
2437
2438 /*
2439 * STR sequence must be checked before anything else
2440 * because it uses all following characters until it
2441 * receives a ESC, a SUB, a ST or any other C1 control
2442 * character.
2443 */
2444 if(term.esc & ESC_STR) {
2445 if(width == 1 &&
2446 (ascii == '\a' || ascii == 030 ||
2447 ascii == 032 || ascii == 033 ||
2448 ISCONTROLC1(unicodep))) {
2449 term.esc &= ~(ESC_START|ESC_STR);
2450 term.esc |= ESC_STR_END;
2451 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2452 memmove(&strescseq.buf[strescseq.len], c, len);
2453 strescseq.len += len;
2454 return;
2455 } else {
2456 /*
2457 * Here is a bug in terminals. If the user never sends
2458 * some code to stop the str or esc command, then st
2459 * will stop responding. But this is better than
2460 * silently failing with unknown characters. At least
2461 * then users will report back.
2462 *
2463 * In the case users ever get fixed, here is the code:
2464 */
2465 /*
2466 * term.esc = 0;
2467 * strhandle();
2468 */
2469 return;
2470 }
2471 }
2472
2473 /*
2474 * Actions of control codes must be performed as soon they arrive
2475 * because they can be embedded inside a control sequence, and
2476 * they must not cause conflicts with sequences.
2477 */
2478 if(control) {
2479 tcontrolcode(ascii);
2480 /*
2481 * control codes are not shown ever
2482 */
2483 return;
2484 } else if(term.esc & ESC_START) {
2485 if(term.esc & ESC_CSI) {
2486 csiescseq.buf[csiescseq.len++] = ascii;
2487 if(BETWEEN(ascii, 0x40, 0x7E)
2488 || csiescseq.len >= \
2489 sizeof(csiescseq.buf)-1) {
2490 term.esc = 0;
2491 csiparse();
2492 csihandle();
2493 }
2494 return;
2495 } else if(term.esc & ESC_ALTCHARSET) {
2496 tdeftran(ascii);
2497 } else if(term.esc & ESC_TEST) {
2498 tdectest(ascii);
2499 } else {
2500 switch(ascii) {
2501 case '[':
2502 term.esc |= ESC_CSI;
2503 return;
2504 case '#':
2505 term.esc |= ESC_TEST;
2506 return;
2507 case 'P': /* DCS -- Device Control String */
2508 case '_': /* APC -- Application Program Command */
2509 case '^': /* PM -- Privacy Message */
2510 case ']': /* OSC -- Operating System Command */
2511 case 'k': /* old title set compatibility */
2512 strreset();
2513 strescseq.type = ascii;
2514 term.esc |= ESC_STR;
2515 return;
2516 case '(': /* set primary charset G0 */
2517 case ')': /* set secondary charset G1 */
2518 case '*': /* set tertiary charset G2 */
2519 case '+': /* set quaternary charset G3 */
2520 term.icharset = ascii - '(';
2521 term.esc |= ESC_ALTCHARSET;
2522 return;
2523 case 'D': /* IND -- Linefeed */
2524 if(term.c.y == term.bot) {
2525 tscrollup(term.top, 1);
2526 } else {
2527 tmoveto(term.c.x, term.c.y+1);
2528 }
2529 break;
2530 case 'E': /* NEL -- Next line */
2531 tnewline(1); /* always go to first col */
2532 break;
2533 case 'H': /* HTS -- Horizontal tab stop */
2534 term.tabs[term.c.x] = 1;
2535 break;
2536 case 'M': /* RI -- Reverse index */
2537 if(term.c.y == term.top) {
2538 tscrolldown(term.top, 1);
2539 } else {
2540 tmoveto(term.c.x, term.c.y-1);
2541 }
2542 break;
2543 case 'Z': /* DECID -- Identify Terminal */
2544 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2545 break;
2546 case 'c': /* RIS -- Reset to inital state */
2547 treset();
2548 xresettitle();
2549 xloadcols();
2550 break;
2551 case '=': /* DECPAM -- Application keypad */
2552 term.mode |= MODE_APPKEYPAD;
2553 break;
2554 case '>': /* DECPNM -- Normal keypad */
2555 term.mode &= ~MODE_APPKEYPAD;
2556 break;
2557 case '7': /* DECSC -- Save Cursor */
2558 tcursor(CURSOR_SAVE);
2559 break;
2560 case '8': /* DECRC -- Restore Cursor */
2561 tcursor(CURSOR_LOAD);
2562 break;
2563 case '\\': /* ST -- String Terminator */
2564 if(term.esc & ESC_STR_END)
2565 strhandle();
2566 break;
2567 default:
2568 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2569 (uchar) ascii, isprint(ascii)? ascii:'.');
2570 break;
2571 }
2572 }
2573 term.esc = 0;
2574 /*
2575 * All characters which form part of a sequence are not
2576 * printed
2577 */
2578 return;
2579 }
2580 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2581 selclear(NULL);
2582
2583 gp = &term.line[term.c.y][term.c.x];
2584 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2585 gp->mode |= ATTR_WRAP;
2586 tnewline(1);
2587 }
2588
2589 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2590 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2591
2592 if(term.c.x+width > term.col)
2593 tnewline(1);
2594
2595 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2596
2597 if(width == 2) {
2598 gp->mode |= ATTR_WIDE;
2599 if(term.c.x+1 < term.col) {
2600 gp[1].c[0] = '\0';
2601 gp[1].mode = ATTR_WDUMMY;
2602 }
2603 }
2604 if(term.c.x+width < term.col) {
2605 tmoveto(term.c.x+width, term.c.y);
2606 } else {
2607 term.c.state |= CURSOR_WRAPNEXT;
2608 }
2609 }
2610
2611 int
2612 tresize(int col, int row) {
2613 int i;
2614 int minrow = MIN(row, term.row);
2615 int mincol = MIN(col, term.col);
2616 int slide = term.c.y - row + 1;
2617 bool *bp;
2618 Line *orig;
2619 TCursor c;
2620
2621 if(col < 1 || row < 1)
2622 return 0;
2623
2624 /* free unneeded rows */
2625 i = 0;
2626 if(slide > 0) {
2627 /*
2628 * slide screen to keep cursor where we expect it -
2629 * tscrollup would work here, but we can optimize to
2630 * memmove because we're freeing the earlier lines
2631 */
2632 for(/* i = 0 */; i < slide; i++) {
2633 free(term.line[i]);
2634 free(term.alt[i]);
2635 }
2636 memmove(term.line, term.line + slide, row * sizeof(Line));
2637 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2638 }
2639 for(i += row; i < term.row; i++) {
2640 free(term.line[i]);
2641 free(term.alt[i]);
2642 }
2643
2644 /* resize to new height */
2645 term.line = xrealloc(term.line, row * sizeof(Line));
2646 term.alt = xrealloc(term.alt, row * sizeof(Line));
2647 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2648 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2649
2650 /* resize each row to new width, zero-pad if needed */
2651 for(i = 0; i < minrow; i++) {
2652 term.dirty[i] = 1;
2653 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2654 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2655 }
2656
2657 /* allocate any new rows */
2658 for(/* i == minrow */; i < row; i++) {
2659 term.dirty[i] = 1;
2660 term.line[i] = xmalloc(col * sizeof(Glyph));
2661 term.alt[i] = xmalloc(col * sizeof(Glyph));
2662 }
2663 if(col > term.col) {
2664 bp = term.tabs + term.col;
2665
2666 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2667 while(--bp > term.tabs && !*bp)
2668 /* nothing */ ;
2669 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2670 *bp = 1;
2671 }
2672 /* update terminal size */
2673 term.col = col;
2674 term.row = row;
2675 /* reset scrolling region */
2676 tsetscroll(0, row-1);
2677 /* make use of the LIMIT in tmoveto */
2678 tmoveto(term.c.x, term.c.y);
2679 /* Clearing both screens */
2680 orig = term.line;
2681 c = term.c;
2682 do {
2683 if(mincol < col && 0 < minrow) {
2684 tclearregion(mincol, 0, col - 1, minrow - 1);
2685 }
2686 if(0 < col && minrow < row) {
2687 tclearregion(0, minrow, col - 1, row - 1);
2688 }
2689 tswapscreen();
2690 tcursor(CURSOR_LOAD);
2691 } while(orig != term.line);
2692 term.c = c;
2693
2694 return (slide > 0);
2695 }
2696
2697 void
2698 xresize(int col, int row) {
2699 xw.tw = MAX(1, col * xw.cw);
2700 xw.th = MAX(1, row * xw.ch);
2701
2702 XFreePixmap(xw.dpy, xw.buf);
2703 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2704 DefaultDepth(xw.dpy, xw.scr));
2705 XftDrawChange(xw.draw, xw.buf);
2706 xclear(0, 0, xw.w, xw.h);
2707 }
2708
2709 static inline ushort
2710 sixd_to_16bit(int x) {
2711 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2712 }
2713
2714 void
2715 xloadcols(void) {
2716 int i;
2717 XRenderColor color = { .alpha = 0xffff };
2718 static bool loaded;
2719 Color *cp;
2720
2721 if(loaded) {
2722 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2723 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2724 }
2725
2726 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2727 for(i = 0; i < LEN(colorname); i++) {
2728 if(!colorname[i])
2729 continue;
2730 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2731 die("Could not allocate color '%s'\n", colorname[i]);
2732 }
2733 }
2734
2735 /* load colors [16-231] ; same colors as xterm */
2736 for(i = 16; i < 6*6*6+16; i++) {
2737 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2738 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2739 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2740 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2741 die("Could not allocate color %d\n", i);
2742 }
2743
2744 /* load colors [232-255] ; grayscale */
2745 for(; i < 256; i++) {
2746 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2747 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2748 die("Could not allocate color %d\n", i);
2749 }
2750 loaded = true;
2751 }
2752
2753 int
2754 xsetcolorname(int x, const char *name) {
2755 XRenderColor color = { .alpha = 0xffff };
2756 Color ncolor;
2757
2758 if(!BETWEEN(x, 0, LEN(colorname)))
2759 return 1;
2760
2761 if(!name) {
2762 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2763 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2764 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2765 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2766 if(!XftColorAllocValue(xw.dpy, xw.vis,
2767 xw.cmap, &color, &ncolor)) {
2768 return 1;
2769 }
2770
2771 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2772 dc.col[x] = ncolor;
2773 return 0;
2774 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2775 color.red = color.green = color.blue = \
2776 0x0808 + 0x0a0a * (x - (16 + 216));
2777 if(!XftColorAllocValue(xw.dpy, xw.vis,
2778 xw.cmap, &color, &ncolor)) {
2779 return 1;
2780 }
2781
2782 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2783 dc.col[x] = ncolor;
2784 return 0;
2785 } else { /* system colors */
2786 name = colorname[x];
2787 }
2788 }
2789 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2790 return 1;
2791
2792 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2793 dc.col[x] = ncolor;
2794 return 0;
2795 }
2796
2797 void
2798 xtermclear(int col1, int row1, int col2, int row2) {
2799 XftDrawRect(xw.draw,
2800 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2801 borderpx + col1 * xw.cw,
2802 borderpx + row1 * xw.ch,
2803 (col2-col1+1) * xw.cw,
2804 (row2-row1+1) * xw.ch);
2805 }
2806
2807 /*
2808 * Absolute coordinates.
2809 */
2810 void
2811 xclear(int x1, int y1, int x2, int y2) {
2812 XftDrawRect(xw.draw,
2813 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2814 x1, y1, x2-x1, y2-y1);
2815 }
2816
2817 void
2818 xhints(void) {
2819 XClassHint class = {opt_class ? opt_class : termname, termname};
2820 XWMHints wm = {.flags = InputHint, .input = 1};
2821 XSizeHints *sizeh = NULL;
2822
2823 sizeh = XAllocSizeHints();
2824
2825 sizeh->flags = PSize | PResizeInc | PBaseSize;
2826 sizeh->height = xw.h;
2827 sizeh->width = xw.w;
2828 sizeh->height_inc = xw.ch;
2829 sizeh->width_inc = xw.cw;
2830 sizeh->base_height = 2 * borderpx;
2831 sizeh->base_width = 2 * borderpx;
2832 if(xw.isfixed == True) {
2833 sizeh->flags |= PMaxSize | PMinSize;
2834 sizeh->min_width = sizeh->max_width = xw.w;
2835 sizeh->min_height = sizeh->max_height = xw.h;
2836 }
2837 if(xw.gm & (XValue|YValue)) {
2838 sizeh->flags |= USPosition | PWinGravity;
2839 sizeh->x = xw.l;
2840 sizeh->y = xw.t;
2841 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2842 }
2843
2844 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2845 &class);
2846 XFree(sizeh);
2847 }
2848
2849 int
2850 xgeommasktogravity(int mask) {
2851 switch(mask & (XNegative|YNegative)) {
2852 case 0:
2853 return NorthWestGravity;
2854 case XNegative:
2855 return NorthEastGravity;
2856 case YNegative:
2857 return SouthWestGravity;
2858 }
2859 return SouthEastGravity;
2860 }
2861
2862 int
2863 xloadfont(Font *f, FcPattern *pattern) {
2864 FcPattern *match;
2865 FcResult result;
2866
2867 match = FcFontMatch(NULL, pattern, &result);
2868 if(!match)
2869 return 1;
2870
2871 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2872 FcPatternDestroy(match);
2873 return 1;
2874 }
2875
2876 f->set = NULL;
2877 f->pattern = FcPatternDuplicate(pattern);
2878
2879 f->ascent = f->match->ascent;
2880 f->descent = f->match->descent;
2881 f->lbearing = 0;
2882 f->rbearing = f->match->max_advance_width;
2883
2884 f->height = f->ascent + f->descent;
2885 f->width = f->lbearing + f->rbearing;
2886
2887 return 0;
2888 }
2889
2890 void
2891 xloadfonts(char *fontstr, double fontsize) {
2892 FcPattern *pattern;
2893 FcResult r_sz, r_psz;
2894 double fontval;
2895
2896 if(fontstr[0] == '-') {
2897 pattern = XftXlfdParse(fontstr, False, False);
2898 } else {
2899 pattern = FcNameParse((FcChar8 *)fontstr);
2900 }
2901
2902 if(!pattern)
2903 die("st: can't open font %s\n", fontstr);
2904
2905 if(fontsize > 0) {
2906 FcPatternDel(pattern, FC_PIXEL_SIZE);
2907 FcPatternDel(pattern, FC_SIZE);
2908 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2909 usedfontsize = fontsize;
2910 } else {
2911 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2912 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2913 if(r_psz == FcResultMatch) {
2914 usedfontsize = fontval;
2915 } else if(r_sz == FcResultMatch) {
2916 usedfontsize = -1;
2917 } else {
2918 /*
2919 * Default font size is 12, if none given. This is to
2920 * have a known usedfontsize value.
2921 */
2922 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2923 usedfontsize = 12;
2924 }
2925 }
2926
2927 FcConfigSubstitute(0, pattern, FcMatchPattern);
2928 FcDefaultSubstitute(pattern);
2929
2930 if(xloadfont(&dc.font, pattern))
2931 die("st: can't open font %s\n", fontstr);
2932
2933 if(usedfontsize < 0) {
2934 FcPatternGetDouble(dc.font.match->pattern,
2935 FC_PIXEL_SIZE, 0, &fontval);
2936 usedfontsize = fontval;
2937 }
2938
2939 /* Setting character width and height. */
2940 xw.cw = CEIL(dc.font.width * cwscale);
2941 xw.ch = CEIL(dc.font.height * chscale);
2942
2943 FcPatternDel(pattern, FC_SLANT);
2944 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2945 if(xloadfont(&dc.ifont, pattern))
2946 die("st: can't open font %s\n", fontstr);
2947
2948 FcPatternDel(pattern, FC_WEIGHT);
2949 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2950 if(xloadfont(&dc.ibfont, pattern))
2951 die("st: can't open font %s\n", fontstr);
2952
2953 FcPatternDel(pattern, FC_SLANT);
2954 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2955 if(xloadfont(&dc.bfont, pattern))
2956 die("st: can't open font %s\n", fontstr);
2957
2958 FcPatternDestroy(pattern);
2959 }
2960
2961 int
2962 xloadfontset(Font *f) {
2963 FcResult result;
2964
2965 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2966 return 1;
2967 return 0;
2968 }
2969
2970 void
2971 xunloadfont(Font *f) {
2972 XftFontClose(xw.dpy, f->match);
2973 FcPatternDestroy(f->pattern);
2974 if(f->set)
2975 FcFontSetDestroy(f->set);
2976 }
2977
2978 void
2979 xunloadfonts(void) {
2980 /* Free the loaded fonts in the font cache. */
2981 while(frclen > 0)
2982 XftFontClose(xw.dpy, frc[--frclen].font);
2983
2984 xunloadfont(&dc.font);
2985 xunloadfont(&dc.bfont);
2986 xunloadfont(&dc.ifont);
2987 xunloadfont(&dc.ibfont);
2988 }
2989
2990 void
2991 xzoom(const Arg *arg) {
2992 xunloadfonts();
2993 xloadfonts(usedfont, usedfontsize + arg->i);
2994 cresize(0, 0);
2995 redraw(0);
2996 xhints();
2997 }
2998
2999 void
3000 xinit(void) {
3001 XGCValues gcvalues;
3002 Cursor cursor;
3003 Window parent;
3004 pid_t thispid = getpid();
3005
3006 if(!(xw.dpy = XOpenDisplay(NULL)))
3007 die("Can't open display\n");
3008 xw.scr = XDefaultScreen(xw.dpy);
3009 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3010
3011 /* font */
3012 if(!FcInit())
3013 die("Could not init fontconfig.\n");
3014
3015 usedfont = (opt_font == NULL)? font : opt_font;
3016 xloadfonts(usedfont, 0);
3017
3018 /* colors */
3019 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3020 xloadcols();
3021
3022 /* adjust fixed window geometry */
3023 xw.w = 2 * borderpx + term.col * xw.cw;
3024 xw.h = 2 * borderpx + term.row * xw.ch;
3025 if(xw.gm & XNegative)
3026 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3027 if(xw.gm & YNegative)
3028 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3029
3030 /* Events */
3031 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3032 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3033 xw.attrs.bit_gravity = NorthWestGravity;
3034 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3035 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3036 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3037 xw.attrs.colormap = xw.cmap;
3038
3039 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3040 XRootWindow(xw.dpy, xw.scr);
3041 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3042 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3043 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3044 | CWEventMask | CWColormap, &xw.attrs);
3045
3046 memset(&gcvalues, 0, sizeof(gcvalues));
3047 gcvalues.graphics_exposures = False;
3048 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3049 &gcvalues);
3050 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3051 DefaultDepth(xw.dpy, xw.scr));
3052 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3053 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3054
3055 /* Xft rendering context */
3056 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3057
3058 /* input methods */
3059 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3060 XSetLocaleModifiers("@im=local");
3061 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3062 XSetLocaleModifiers("@im=");
3063 if((xw.xim = XOpenIM(xw.dpy,
3064 NULL, NULL, NULL)) == NULL) {
3065 die("XOpenIM failed. Could not open input"
3066 " device.\n");
3067 }
3068 }
3069 }
3070 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3071 | XIMStatusNothing, XNClientWindow, xw.win,
3072 XNFocusWindow, xw.win, NULL);
3073 if(xw.xic == NULL)
3074 die("XCreateIC failed. Could not obtain input method.\n");
3075
3076 /* white cursor, black outline */
3077 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3078 XDefineCursor(xw.dpy, xw.win, cursor);
3079 XRecolorCursor(xw.dpy, cursor,
3080 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3081 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3082
3083 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3084 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3085 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3086 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3087
3088 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3089 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3090 PropModeReplace, (uchar *)&thispid, 1);
3091
3092 xresettitle();
3093 XMapWindow(xw.dpy, xw.win);
3094 xhints();
3095 XSync(xw.dpy, False);
3096 }
3097
3098 void
3099 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3100 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3101 width = charlen * xw.cw, xp, i;
3102 int frcflags;
3103 int u8fl, u8fblen, u8cblen, doesexist;
3104 char *u8c, *u8fs;
3105 long unicodep;
3106 Font *font = &dc.font;
3107 FcResult fcres;
3108 FcPattern *fcpattern, *fontpattern;
3109 FcFontSet *fcsets[] = { NULL };
3110 FcCharSet *fccharset;
3111 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3112 XRenderColor colfg, colbg;
3113 XRectangle r;
3114 int oneatatime;
3115
3116 frcflags = FRC_NORMAL;
3117
3118 if(base.mode & ATTR_ITALIC) {
3119 if(base.fg == defaultfg)
3120 base.fg = defaultitalic;
3121 font = &dc.ifont;
3122 frcflags = FRC_ITALIC;
3123 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3124 if(base.fg == defaultfg)
3125 base.fg = defaultitalic;
3126 font = &dc.ibfont;
3127 frcflags = FRC_ITALICBOLD;
3128 } else if(base.mode & ATTR_UNDERLINE) {
3129 if(base.fg == defaultfg)
3130 base.fg = defaultunderline;
3131 }
3132
3133 if(IS_TRUECOL(base.fg)) {
3134 colfg.alpha = 0xffff;
3135 colfg.red = TRUERED(base.fg);
3136 colfg.green = TRUEGREEN(base.fg);
3137 colfg.blue = TRUEBLUE(base.fg);
3138 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3139 fg = &truefg;
3140 } else {
3141 fg = &dc.col[base.fg];
3142 }
3143
3144 if(IS_TRUECOL(base.bg)) {
3145 colbg.alpha = 0xffff;
3146 colbg.green = TRUEGREEN(base.bg);
3147 colbg.red = TRUERED(base.bg);
3148 colbg.blue = TRUEBLUE(base.bg);
3149 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3150 bg = &truebg;
3151 } else {
3152 bg = &dc.col[base.bg];
3153 }
3154
3155 if(base.mode & ATTR_BOLD) {
3156 /*
3157 * change basic system colors [0-7]
3158 * to bright system colors [8-15]
3159 */
3160 if(BETWEEN(base.fg, 0, 7))
3161 fg = &dc.col[base.fg + 8];
3162
3163 if(base.mode & ATTR_ITALIC) {
3164 font = &dc.ibfont;
3165 frcflags = FRC_ITALICBOLD;
3166 } else {
3167 font = &dc.bfont;
3168 frcflags = FRC_BOLD;
3169 }
3170 }
3171
3172 if(IS_SET(MODE_REVERSE)) {
3173 if(fg == &dc.col[defaultfg]) {
3174 fg = &dc.col[defaultbg];
3175 } else {
3176 colfg.red = ~fg->color.red;
3177 colfg.green = ~fg->color.green;
3178 colfg.blue = ~fg->color.blue;
3179 colfg.alpha = fg->color.alpha;
3180 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3181 &revfg);
3182 fg = &revfg;
3183 }
3184
3185 if(bg == &dc.col[defaultbg]) {
3186 bg = &dc.col[defaultfg];
3187 } else {
3188 colbg.red = ~bg->color.red;
3189 colbg.green = ~bg->color.green;
3190 colbg.blue = ~bg->color.blue;
3191 colbg.alpha = bg->color.alpha;
3192 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3193 &revbg);
3194 bg = &revbg;
3195 }
3196 }
3197
3198 if(base.mode & ATTR_REVERSE) {
3199 temp = fg;
3200 fg = bg;
3201 bg = temp;
3202 }
3203
3204 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3205 fg = bg;
3206
3207 /* Intelligent cleaning up of the borders. */
3208 if(x == 0) {
3209 xclear(0, (y == 0)? 0 : winy, borderpx,
3210 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3211 }
3212 if(x + charlen >= term.col) {
3213 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3214 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3215 }
3216 if(y == 0)
3217 xclear(winx, 0, winx + width, borderpx);
3218 if(y == term.row-1)
3219 xclear(winx, winy + xw.ch, winx + width, xw.h);
3220
3221 /* Clean up the region we want to draw to. */
3222 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3223
3224 /* Set the clip region because Xft is sometimes dirty. */
3225 r.x = 0;
3226 r.y = 0;
3227 r.height = xw.ch;
3228 r.width = width;
3229 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3230
3231 for(xp = winx; bytelen > 0;) {
3232 /*
3233 * Search for the range in the to be printed string of glyphs
3234 * that are in the main font. Then print that range. If
3235 * some glyph is found that is not in the font, do the
3236 * fallback dance.
3237 */
3238 u8fs = s;
3239 u8fblen = 0;
3240 u8fl = 0;
3241 oneatatime = font->width != xw.cw;
3242 for(;;) {
3243 u8c = s;
3244 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3245 s += u8cblen;
3246 bytelen -= u8cblen;
3247
3248 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3249 if(doesexist) {
3250 u8fl++;
3251 u8fblen += u8cblen;
3252 if(!oneatatime && bytelen > 0)
3253 continue;
3254 }
3255
3256 if(u8fl > 0) {
3257 XftDrawStringUtf8(xw.draw, fg,
3258 font->match, xp,
3259 winy + font->ascent,
3260 (FcChar8 *)u8fs,
3261 u8fblen);
3262 xp += xw.cw * u8fl;
3263 }
3264 break;
3265 }
3266 if(doesexist) {
3267 if(oneatatime)
3268 continue;
3269 break;
3270 }
3271
3272 /* Search the font cache. */
3273 for(i = 0; i < frclen; i++) {
3274 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3275 && frc[i].flags == frcflags) {
3276 break;
3277 }
3278 }
3279
3280 /* Nothing was found. */
3281 if(i >= frclen) {
3282 if(!font->set)
3283 xloadfontset(font);
3284 fcsets[0] = font->set;
3285
3286 /*
3287 * Nothing was found in the cache. Now use
3288 * some dozen of Fontconfig calls to get the
3289 * font for one single character.
3290 *
3291 * Xft and fontconfig are design failures.
3292 */
3293 fcpattern = FcPatternDuplicate(font->pattern);
3294 fccharset = FcCharSetCreate();
3295
3296 FcCharSetAddChar(fccharset, unicodep);
3297 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3298 fccharset);
3299 FcPatternAddBool(fcpattern, FC_SCALABLE,
3300 FcTrue);
3301
3302 FcConfigSubstitute(0, fcpattern,
3303 FcMatchPattern);
3304 FcDefaultSubstitute(fcpattern);
3305
3306 fontpattern = FcFontSetMatch(0, fcsets,
3307 FcTrue, fcpattern, &fcres);
3308
3309 /*
3310 * Overwrite or create the new cache entry.
3311 */
3312 if(frclen >= LEN(frc)) {
3313 frclen = LEN(frc) - 1;
3314 XftFontClose(xw.dpy, frc[frclen].font);
3315 }
3316
3317 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3318 fontpattern);
3319 frc[frclen].flags = frcflags;
3320
3321 i = frclen;
3322 frclen++;
3323
3324 FcPatternDestroy(fcpattern);
3325 FcCharSetDestroy(fccharset);
3326 }
3327
3328 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3329 xp, winy + frc[i].font->ascent,
3330 (FcChar8 *)u8c, u8cblen);
3331
3332 xp += xw.cw * wcwidth(unicodep);
3333 }
3334
3335 /*
3336 * This is how the loop above actually should be. Why does the
3337 * application have to care about font details?
3338 *
3339 * I have to repeat: Xft and Fontconfig are design failures.
3340 */
3341 /*
3342 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3343 winy + font->ascent, (FcChar8 *)s, bytelen);
3344 */
3345
3346 if(base.mode & ATTR_UNDERLINE) {
3347 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3348 width, 1);
3349 }
3350
3351 /* Reset clip to none. */
3352 XftDrawSetClip(xw.draw, 0);
3353 }
3354
3355 void
3356 xdrawcursor(void) {
3357 static int oldx = 0, oldy = 0;
3358 int sl, width, curx;
3359 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3360
3361 LIMIT(oldx, 0, term.col-1);
3362 LIMIT(oldy, 0, term.row-1);
3363
3364 curx = term.c.x;
3365
3366 /* adjust position if in dummy */
3367 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3368 oldx--;
3369 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3370 curx--;
3371
3372 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3373
3374 /* remove the old cursor */
3375 sl = utf8len(term.line[oldy][oldx].c);
3376 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3377 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3378 oldy, width, sl);
3379
3380 /* draw the new one */
3381 if(!(IS_SET(MODE_HIDE))) {
3382 if(xw.state & WIN_FOCUSED) {
3383 if(IS_SET(MODE_REVERSE)) {
3384 g.mode |= ATTR_REVERSE;
3385 g.fg = defaultcs;
3386 g.bg = defaultfg;
3387 }
3388
3389 sl = utf8len(g.c);
3390 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3391 ? 2 : 1;
3392 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3393 } else {
3394 XftDrawRect(xw.draw, &dc.col[defaultcs],
3395 borderpx + curx * xw.cw,
3396 borderpx + term.c.y * xw.ch,
3397 xw.cw - 1, 1);
3398 XftDrawRect(xw.draw, &dc.col[defaultcs],
3399 borderpx + curx * xw.cw,
3400 borderpx + term.c.y * xw.ch,
3401 1, xw.ch - 1);
3402 XftDrawRect(xw.draw, &dc.col[defaultcs],
3403 borderpx + (curx + 1) * xw.cw - 1,
3404 borderpx + term.c.y * xw.ch,
3405 1, xw.ch - 1);
3406 XftDrawRect(xw.draw, &dc.col[defaultcs],
3407 borderpx + curx * xw.cw,
3408 borderpx + (term.c.y + 1) * xw.ch - 1,
3409 xw.cw, 1);
3410 }
3411 oldx = curx, oldy = term.c.y;
3412 }
3413 }
3414
3415
3416 void
3417 xsettitle(char *p) {
3418 XTextProperty prop;
3419
3420 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3421 &prop);
3422 XSetWMName(xw.dpy, xw.win, &prop);
3423 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3424 XFree(prop.value);
3425 }
3426
3427 void
3428 xresettitle(void) {
3429 xsettitle(opt_title ? opt_title : "st");
3430 }
3431
3432 void
3433 redraw(int timeout) {
3434 struct timespec tv = {0, timeout * 1000};
3435
3436 tfulldirt();
3437 draw();
3438
3439 if(timeout > 0) {
3440 nanosleep(&tv, NULL);
3441 XSync(xw.dpy, False); /* necessary for a good tput flash */
3442 }
3443 }
3444
3445 void
3446 draw(void) {
3447 drawregion(0, 0, term.col, term.row);
3448 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3449 xw.h, 0, 0);
3450 XSetForeground(xw.dpy, dc.gc,
3451 dc.col[IS_SET(MODE_REVERSE)?
3452 defaultfg : defaultbg].pixel);
3453 }
3454
3455 void
3456 drawregion(int x1, int y1, int x2, int y2) {
3457 int ic, ib, x, y, ox, sl;
3458 Glyph base, new;
3459 char buf[DRAW_BUF_SIZ];
3460 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3461 long unicodep;
3462
3463 if(!(xw.state & WIN_VISIBLE))
3464 return;
3465
3466 for(y = y1; y < y2; y++) {
3467 if(!term.dirty[y])
3468 continue;
3469
3470 xtermclear(0, y, term.col, y);
3471 term.dirty[y] = 0;
3472 base = term.line[y][0];
3473 ic = ib = ox = 0;
3474 for(x = x1; x < x2; x++) {
3475 new = term.line[y][x];
3476 if(new.mode == ATTR_WDUMMY)
3477 continue;
3478 if(ena_sel && selected(x, y))
3479 new.mode ^= ATTR_REVERSE;
3480 if(ib > 0 && (ATTRCMP(base, new)
3481 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3482 xdraws(buf, base, ox, y, ic, ib);
3483 ic = ib = 0;
3484 }
3485 if(ib == 0) {
3486 ox = x;
3487 base = new;
3488 }
3489
3490 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3491 memcpy(buf+ib, new.c, sl);
3492 ib += sl;
3493 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3494 }
3495 if(ib > 0)
3496 xdraws(buf, base, ox, y, ic, ib);
3497 }
3498 xdrawcursor();
3499 }
3500
3501 void
3502 expose(XEvent *ev) {
3503 XExposeEvent *e = &ev->xexpose;
3504
3505 if(xw.state & WIN_REDRAW) {
3506 if(!e->count)
3507 xw.state &= ~WIN_REDRAW;
3508 }
3509 redraw(0);
3510 }
3511
3512 void
3513 visibility(XEvent *ev) {
3514 XVisibilityEvent *e = &ev->xvisibility;
3515
3516 if(e->state == VisibilityFullyObscured) {
3517 xw.state &= ~WIN_VISIBLE;
3518 } else if(!(xw.state & WIN_VISIBLE)) {
3519 /* need a full redraw for next Expose, not just a buf copy */
3520 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3521 }
3522 }
3523
3524 void
3525 unmap(XEvent *ev) {
3526 xw.state &= ~WIN_VISIBLE;
3527 }
3528
3529 void
3530 xsetpointermotion(int set) {
3531 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3532 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3533 }
3534
3535 void
3536 xseturgency(int add) {
3537 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3538
3539 MODBIT(h->flags, add, XUrgencyHint);
3540 XSetWMHints(xw.dpy, xw.win, h);
3541 XFree(h);
3542 }
3543
3544 void
3545 focus(XEvent *ev) {
3546 XFocusChangeEvent *e = &ev->xfocus;
3547
3548 if(e->mode == NotifyGrab)
3549 return;
3550
3551 if(ev->type == FocusIn) {
3552 XSetICFocus(xw.xic);
3553 xw.state |= WIN_FOCUSED;
3554 xseturgency(0);
3555 if(IS_SET(MODE_FOCUS))
3556 ttywrite("\033[I", 3);
3557 } else {
3558 XUnsetICFocus(xw.xic);
3559 xw.state &= ~WIN_FOCUSED;
3560 if(IS_SET(MODE_FOCUS))
3561 ttywrite("\033[O", 3);
3562 }
3563 }
3564
3565 static inline bool
3566 match(uint mask, uint state) {
3567 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3568 }
3569
3570 void
3571 numlock(const Arg *dummy) {
3572 term.numlock ^= 1;
3573 }
3574
3575 char*
3576 kmap(KeySym k, uint state) {
3577 Key *kp;
3578 int i;
3579
3580 /* Check for mapped keys out of X11 function keys. */
3581 for(i = 0; i < LEN(mappedkeys); i++) {
3582 if(mappedkeys[i] == k)
3583 break;
3584 }
3585 if(i == LEN(mappedkeys)) {
3586 if((k & 0xFFFF) < 0xFD00)
3587 return NULL;
3588 }
3589
3590 for(kp = key; kp < key + LEN(key); kp++) {
3591 if(kp->k != k)
3592 continue;
3593
3594 if(!match(kp->mask, state))
3595 continue;
3596
3597 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3598 continue;
3599 if(term.numlock && kp->appkey == 2)
3600 continue;
3601
3602 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3603 continue;
3604
3605 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3606 continue;
3607
3608 return kp->s;
3609 }
3610
3611 return NULL;
3612 }
3613
3614 void
3615 kpress(XEvent *ev) {
3616 XKeyEvent *e = &ev->xkey;
3617 KeySym ksym;
3618 char buf[32], *customkey;
3619 int len;
3620 long c;
3621 Status status;
3622 Shortcut *bp;
3623
3624 if(IS_SET(MODE_KBDLOCK))
3625 return;
3626
3627 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3628 /* 1. shortcuts */
3629 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3630 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3631 bp->func(&(bp->arg));
3632 return;
3633 }
3634 }
3635
3636 /* 2. custom keys from config.h */
3637 if((customkey = kmap(ksym, e->state))) {
3638 ttysend(customkey, strlen(customkey));
3639 return;
3640 }
3641
3642 /* 3. composed string from input method */
3643 if(len == 0)
3644 return;
3645 if(len == 1 && e->state & Mod1Mask) {
3646 if(IS_SET(MODE_8BIT)) {
3647 if(*buf < 0177) {
3648 c = *buf | 0x80;
3649 len = utf8encode(c, buf, UTF_SIZ);
3650 }
3651 } else {
3652 buf[1] = buf[0];
3653 buf[0] = '\033';
3654 len = 2;
3655 }
3656 }
3657 ttysend(buf, len);
3658 }
3659
3660
3661 void
3662 cmessage(XEvent *e) {
3663 /*
3664 * See xembed specs
3665 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3666 */
3667 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3668 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3669 xw.state |= WIN_FOCUSED;
3670 xseturgency(0);
3671 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3672 xw.state &= ~WIN_FOCUSED;
3673 }
3674 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3675 /* Send SIGHUP to shell */
3676 kill(pid, SIGHUP);
3677 exit(EXIT_SUCCESS);
3678 }
3679 }
3680
3681 void
3682 cresize(int width, int height) {
3683 int col, row;
3684
3685 if(width != 0)
3686 xw.w = width;
3687 if(height != 0)
3688 xw.h = height;
3689
3690 col = (xw.w - 2 * borderpx) / xw.cw;
3691 row = (xw.h - 2 * borderpx) / xw.ch;
3692
3693 tresize(col, row);
3694 xresize(col, row);
3695 ttyresize();
3696 }
3697
3698 void
3699 resize(XEvent *e) {
3700 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3701 return;
3702
3703 cresize(e->xconfigure.width, e->xconfigure.height);
3704 }
3705
3706 void
3707 run(void) {
3708 XEvent ev;
3709 int w = xw.w, h = xw.h;
3710 fd_set rfd;
3711 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3712 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3713 long deltatime;
3714
3715 /* Waiting for window mapping */
3716 while(1) {
3717 XNextEvent(xw.dpy, &ev);
3718 if(ev.type == ConfigureNotify) {
3719 w = ev.xconfigure.width;
3720 h = ev.xconfigure.height;
3721 } else if(ev.type == MapNotify) {
3722 break;
3723 }
3724 }
3725
3726 ttynew();
3727 cresize(w, h);
3728
3729 clock_gettime(CLOCK_MONOTONIC, &last);
3730 lastblink = last;
3731
3732 for(xev = actionfps;;) {
3733 FD_ZERO(&rfd);
3734 FD_SET(cmdfd, &rfd);
3735 FD_SET(xfd, &rfd);
3736
3737 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3738 if(errno == EINTR)
3739 continue;
3740 die("select failed: %s\n", strerror(errno));
3741 }
3742 if(FD_ISSET(cmdfd, &rfd)) {
3743 ttyread();
3744 if(blinktimeout) {
3745 blinkset = tattrset(ATTR_BLINK);
3746 if(!blinkset)
3747 MODBIT(term.mode, 0, MODE_BLINK);
3748 }
3749 }
3750
3751 if(FD_ISSET(xfd, &rfd))
3752 xev = actionfps;
3753
3754 clock_gettime(CLOCK_MONOTONIC, &now);
3755 drawtimeout.tv_sec = 0;
3756 drawtimeout.tv_nsec = (1000/xfps) * 10E6;
3757 tv = &drawtimeout;
3758
3759 dodraw = 0;
3760 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3761 tsetdirtattr(ATTR_BLINK);
3762 term.mode ^= MODE_BLINK;
3763 lastblink = now;
3764 dodraw = 1;
3765 }
3766 deltatime = TIMEDIFF(now, last);
3767 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3768 || deltatime < 0) {
3769 dodraw = 1;
3770 last = now;
3771 }
3772
3773 if(dodraw) {
3774 while(XPending(xw.dpy)) {
3775 XNextEvent(xw.dpy, &ev);
3776 if(XFilterEvent(&ev, None))
3777 continue;
3778 if(handler[ev.type])
3779 (handler[ev.type])(&ev);
3780 }
3781
3782 draw();
3783 XFlush(xw.dpy);
3784
3785 if(xev && !FD_ISSET(xfd, &rfd))
3786 xev--;
3787 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3788 if(blinkset) {
3789 if(TIMEDIFF(now, lastblink) \
3790 > blinktimeout) {
3791 drawtimeout.tv_nsec = 1000;
3792 } else {
3793 drawtimeout.tv_nsec = (10E6 * \
3794 (blinktimeout - \
3795 TIMEDIFF(now,
3796 lastblink)));
3797 }
3798 } else {
3799 tv = NULL;
3800 }
3801 }
3802 }
3803 }
3804 }
3805
3806 void
3807 usage(void) {
3808 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3809 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3810 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3811 }
3812
3813 int
3814 main(int argc, char *argv[]) {
3815 char *titles;
3816 uint cols = 80, rows = 24;
3817
3818 xw.l = xw.t = 0;
3819 xw.isfixed = False;
3820
3821 ARGBEGIN {
3822 case 'a':
3823 allowaltscreen = false;
3824 break;
3825 case 'c':
3826 opt_class = EARGF(usage());
3827 break;
3828 case 'e':
3829 /* eat all remaining arguments */
3830 if(argc > 1) {
3831 opt_cmd = &argv[1];
3832 if(argv[1] != NULL && opt_title == NULL) {
3833 titles = xstrdup(argv[1]);
3834 opt_title = basename(titles);
3835 }
3836 }
3837 goto run;
3838 case 'f':
3839 opt_font = EARGF(usage());
3840 break;
3841 case 'g':
3842 xw.gm = XParseGeometry(EARGF(usage()),
3843 &xw.l, &xw.t, &cols, &rows);
3844 break;
3845 case 'i':
3846 xw.isfixed = True;
3847 break;
3848 case 'o':
3849 opt_io = EARGF(usage());
3850 break;
3851 case 't':
3852 opt_title = EARGF(usage());
3853 break;
3854 case 'w':
3855 opt_embed = EARGF(usage());
3856 break;
3857 case 'v':
3858 default:
3859 usage();
3860 } ARGEND;
3861
3862 run:
3863 setlocale(LC_CTYPE, "");
3864 XSetLocaleModifiers("");
3865 tnew(cols? cols : 1, rows? rows : 1);
3866 xinit();
3867 selinit();
3868 run();
3869
3870 return 0;
3871 }
3872