Xinqi Bao's Git

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