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e60643c85cad9aeed391d4a528a7c6c382327ea2
[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_PRINT = 1048576,
138 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
139 |MODE_MOUSEMANY,
140 };
141
142 enum charset {
143 CS_GRAPHIC0,
144 CS_GRAPHIC1,
145 CS_UK,
146 CS_USA,
147 CS_MULTI,
148 CS_GER,
149 CS_FIN
150 };
151
152 enum escape_state {
153 ESC_START = 1,
154 ESC_CSI = 2,
155 ESC_STR = 4, /* DSC, OSC, PM, APC */
156 ESC_ALTCHARSET = 8,
157 ESC_STR_END = 16, /* a final string was encountered */
158 ESC_TEST = 32, /* Enter in test mode */
159 };
160
161 enum window_state {
162 WIN_VISIBLE = 1,
163 WIN_REDRAW = 2,
164 WIN_FOCUSED = 4
165 };
166
167 enum selection_type {
168 SEL_REGULAR = 1,
169 SEL_RECTANGULAR = 2
170 };
171
172 enum selection_snap {
173 SNAP_WORD = 1,
174 SNAP_LINE = 2
175 };
176
177 typedef unsigned char uchar;
178 typedef unsigned int uint;
179 typedef unsigned long ulong;
180 typedef unsigned short ushort;
181
182 typedef struct {
183 char c[UTF_SIZ]; /* character code */
184 ushort mode; /* attribute flags */
185 uint32_t fg; /* foreground */
186 uint32_t bg; /* background */
187 } Glyph;
188
189 typedef Glyph *Line;
190
191 typedef struct {
192 Glyph attr; /* current char attributes */
193 int x;
194 int y;
195 char state;
196 } TCursor;
197
198 /* CSI Escape sequence structs */
199 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
200 typedef struct {
201 char buf[ESC_BUF_SIZ]; /* raw string */
202 int len; /* raw string length */
203 char priv;
204 int arg[ESC_ARG_SIZ];
205 int narg; /* nb of args */
206 char mode;
207 } CSIEscape;
208
209 /* STR Escape sequence structs */
210 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
211 typedef struct {
212 char type; /* ESC type ... */
213 char buf[STR_BUF_SIZ]; /* raw string */
214 int len; /* raw string length */
215 char *args[STR_ARG_SIZ];
216 int narg; /* nb of args */
217 } STREscape;
218
219 /* Internal representation of the screen */
220 typedef struct {
221 int row; /* nb row */
222 int col; /* nb col */
223 Line *line; /* screen */
224 Line *alt; /* alternate screen */
225 bool *dirty; /* dirtyness of lines */
226 TCursor c; /* cursor */
227 int top; /* top scroll limit */
228 int bot; /* bottom scroll limit */
229 int mode; /* terminal mode flags */
230 int esc; /* escape state flags */
231 char trantbl[4]; /* charset table translation */
232 int charset; /* current charset */
233 int icharset; /* selected charset for sequence */
234 bool numlock; /* lock numbers in keyboard */
235 bool *tabs;
236 } Term;
237
238 /* Purely graphic info */
239 typedef struct {
240 Display *dpy;
241 Colourmap cmap;
242 Window win;
243 Drawable buf;
244 Atom xembed, wmdeletewin, netwmname, netwmpid;
245 XIM xim;
246 XIC xic;
247 Draw draw;
248 Visual *vis;
249 XSetWindowAttributes attrs;
250 int scr;
251 bool isfixed; /* is fixed geometry? */
252 int fx, fy, fw, fh; /* fixed geometry */
253 int tw, th; /* tty width and height */
254 int w, h; /* window width and height */
255 int ch; /* char height */
256 int cw; /* char width */
257 char state; /* focus, redraw, visible */
258 } XWindow;
259
260 typedef struct {
261 uint b;
262 uint mask;
263 char *s;
264 } Mousekey;
265
266 typedef struct {
267 KeySym k;
268 uint mask;
269 char *s;
270 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
271 signed char appkey; /* application keypad */
272 signed char appcursor; /* application cursor */
273 signed char crlf; /* crlf mode */
274 } Key;
275
276 typedef struct {
277 int mode;
278 int type;
279 int snap;
280 /*
281 * Selection variables:
282 * nb – normalized coordinates of the beginning of the selection
283 * ne – normalized coordinates of the end of the selection
284 * ob – original coordinates of the beginning of the selection
285 * oe – original coordinates of the end of the selection
286 */
287 struct {
288 int x, y;
289 } nb, ne, ob, oe;
290
291 char *clip;
292 Atom xtarget;
293 bool alt;
294 struct timeval tclick1;
295 struct timeval tclick2;
296 } Selection;
297
298 typedef union {
299 int i;
300 unsigned int ui;
301 float f;
302 const void *v;
303 } Arg;
304
305 typedef struct {
306 unsigned int mod;
307 KeySym keysym;
308 void (*func)(const Arg *);
309 const Arg arg;
310 } Shortcut;
311
312 /* function definitions used in config.h */
313 static void clippaste(const Arg *);
314 static void numlock(const Arg *);
315 static void selpaste(const Arg *);
316 static void xzoom(const Arg *);
317
318 /* Config.h for applying patches and the configuration. */
319 #include "config.h"
320
321 /* Font structure */
322 typedef struct {
323 int height;
324 int width;
325 int ascent;
326 int descent;
327 short lbearing;
328 short rbearing;
329 XftFont *match;
330 FcFontSet *set;
331 FcPattern *pattern;
332 } Font;
333
334 /* Drawing Context */
335 typedef struct {
336 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
337 Font font, bfont, ifont, ibfont;
338 GC gc;
339 } DC;
340
341 static void die(const char *, ...);
342 static void draw(void);
343 static void redraw(int);
344 static void drawregion(int, int, int, int);
345 static void execsh(void);
346 static void sigchld(int);
347 static void run(void);
348
349 static void csidump(void);
350 static void csihandle(void);
351 static void csiparse(void);
352 static void csireset(void);
353 static void strdump(void);
354 static void strhandle(void);
355 static void strparse(void);
356 static void strreset(void);
357
358 static int tattrset(int);
359 static void tprinter(char *s, size_t len);
360 static void tdumpline(int);
361 static void tclearregion(int, int, int, int);
362 static void tcursor(int);
363 static void tdeletechar(int);
364 static void tdeleteline(int);
365 static void tinsertblank(int);
366 static void tinsertblankline(int);
367 static void tmoveto(int, int);
368 static void tmoveato(int x, int y);
369 static void tnew(int, int);
370 static void tnewline(int);
371 static void tputtab(bool);
372 static void tputc(char *, int);
373 static void treset(void);
374 static int tresize(int, int);
375 static void tscrollup(int, int);
376 static void tscrolldown(int, int);
377 static void tsetattr(int*, int);
378 static void tsetchar(char *, Glyph *, int, int);
379 static void tsetscroll(int, int);
380 static void tswapscreen(void);
381 static void tsetdirt(int, int);
382 static void tsetdirtattr(int);
383 static void tsetmode(bool, bool, int *, int);
384 static void tfulldirt(void);
385 static void techo(char *, int);
386 static int32_t tdefcolor(int *, int *, int);
387 static void tselcs(void);
388 static void tdeftran(char);
389 static inline bool match(uint, uint);
390 static void ttynew(void);
391 static void ttyread(void);
392 static void ttyresize(void);
393 static void ttysend(char *, size_t);
394 static void ttywrite(const char *, size_t);
395
396 static void xdraws(char *, Glyph, int, int, int, int);
397 static void xhints(void);
398 static void xclear(int, int, int, int);
399 static void xdrawcursor(void);
400 static void xinit(void);
401 static void xloadcols(void);
402 static int xsetcolorname(int, const char *);
403 static int xloadfont(Font *, FcPattern *);
404 static void xloadfonts(char *, double);
405 static int xloadfontset(Font *);
406 static void xsettitle(char *);
407 static void xresettitle(void);
408 static void xsetpointermotion(int);
409 static void xseturgency(int);
410 static void xsetsel(char*);
411 static void xtermclear(int, int, int, int);
412 static void xunloadfont(Font *f);
413 static void xunloadfonts(void);
414 static void xresize(int, int);
415
416 static void expose(XEvent *);
417 static void visibility(XEvent *);
418 static void unmap(XEvent *);
419 static char *kmap(KeySym, uint);
420 static void kpress(XEvent *);
421 static void cmessage(XEvent *);
422 static void cresize(int, int);
423 static void resize(XEvent *);
424 static void focus(XEvent *);
425 static void brelease(XEvent *);
426 static void bpress(XEvent *);
427 static void bmotion(XEvent *);
428 static void selnotify(XEvent *);
429 static void selclear(XEvent *);
430 static void selrequest(XEvent *);
431
432 static void selinit(void);
433 static void selsort(void);
434 static inline bool selected(int, int);
435 static void selcopy(void);
436 static void selscroll(int, int);
437 static void selsnap(int, int *, int *, int);
438
439 static int utf8decode(char *, long *);
440 static int utf8encode(long *, char *);
441 static int utf8size(char *);
442 static int isfullutf8(char *, int);
443
444 static ssize_t xwrite(int, char *, size_t);
445 static void *xmalloc(size_t);
446 static void *xrealloc(void *, size_t);
447 static char *xstrdup(char *s);
448
449 static void (*handler[LASTEvent])(XEvent *) = {
450 [KeyPress] = kpress,
451 [ClientMessage] = cmessage,
452 [ConfigureNotify] = resize,
453 [VisibilityNotify] = visibility,
454 [UnmapNotify] = unmap,
455 [Expose] = expose,
456 [FocusIn] = focus,
457 [FocusOut] = focus,
458 [MotionNotify] = bmotion,
459 [ButtonPress] = bpress,
460 [ButtonRelease] = brelease,
461 [SelectionClear] = selclear,
462 [SelectionNotify] = selnotify,
463 [SelectionRequest] = selrequest,
464 };
465
466 /* Globals */
467 static DC dc;
468 static XWindow xw;
469 static Term term;
470 static CSIEscape csiescseq;
471 static STREscape strescseq;
472 static int cmdfd;
473 static pid_t pid;
474 static Selection sel;
475 static int iofd = STDOUT_FILENO;
476 static char **opt_cmd = NULL;
477 static char *opt_io = NULL;
478 static char *opt_title = NULL;
479 static char *opt_embed = NULL;
480 static char *opt_class = NULL;
481 static char *opt_font = NULL;
482 static int oldbutton = 3; /* button event on startup: 3 = release */
483
484 static char *usedfont = NULL;
485 static double usedfontsize = 0;
486
487 /* Font Ring Cache */
488 enum {
489 FRC_NORMAL,
490 FRC_ITALIC,
491 FRC_BOLD,
492 FRC_ITALICBOLD
493 };
494
495 typedef struct {
496 XftFont *font;
497 int flags;
498 } Fontcache;
499
500 /* Fontcache is an array now. A new font will be appended to the array. */
501 static Fontcache frc[16];
502 static int frclen = 0;
503
504 ssize_t
505 xwrite(int fd, char *s, size_t len) {
506 size_t aux = len;
507
508 while(len > 0) {
509 ssize_t r = write(fd, s, len);
510 if(r < 0)
511 return r;
512 len -= r;
513 s += r;
514 }
515 return aux;
516 }
517
518 void *
519 xmalloc(size_t len) {
520 void *p = malloc(len);
521
522 if(!p)
523 die("Out of memory\n");
524
525 return p;
526 }
527
528 void *
529 xrealloc(void *p, size_t len) {
530 if((p = realloc(p, len)) == NULL)
531 die("Out of memory\n");
532
533 return p;
534 }
535
536 char *
537 xstrdup(char *s) {
538 char *p = strdup(s);
539
540 if (!p)
541 die("Out of memory\n");
542
543 return p;
544 }
545
546 int
547 utf8decode(char *s, long *u) {
548 uchar c;
549 int i, n, rtn;
550
551 rtn = 1;
552 c = *s;
553 if(~c & 0x80) { /* 0xxxxxxx */
554 *u = c;
555 return rtn;
556 } else if((c & 0xE0) == 0xC0) { /* 110xxxxx */
557 *u = c & 0x1F;
558 n = 1;
559 } else if((c & 0xF0) == 0xE0) { /* 1110xxxx */
560 *u = c & 0x0F;
561 n = 2;
562 } else if((c & 0xF8) == 0xF0) { /* 11110xxx */
563 *u = c & 0x07;
564 n = 3;
565 } else {
566 goto invalid;
567 }
568
569 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
570 c = *s;
571 if((c & 0xC0) != 0x80) /* 10xxxxxx */
572 goto invalid;
573 *u <<= 6;
574 *u |= c & 0x3F;
575 }
576
577 if((n == 1 && *u < 0x80) ||
578 (n == 2 && *u < 0x800) ||
579 (n == 3 && *u < 0x10000) ||
580 (*u >= 0xD800 && *u <= 0xDFFF)) {
581 goto invalid;
582 }
583
584 return rtn;
585 invalid:
586 *u = 0xFFFD;
587
588 return rtn;
589 }
590
591 int
592 utf8encode(long *u, char *s) {
593 uchar *sp;
594 ulong uc;
595 int i, n;
596
597 sp = (uchar *)s;
598 uc = *u;
599 if(uc < 0x80) {
600 *sp = uc; /* 0xxxxxxx */
601 return 1;
602 } else if(*u < 0x800) {
603 *sp = (uc >> 6) | 0xC0; /* 110xxxxx */
604 n = 1;
605 } else if(uc < 0x10000) {
606 *sp = (uc >> 12) | 0xE0; /* 1110xxxx */
607 n = 2;
608 } else if(uc <= 0x10FFFF) {
609 *sp = (uc >> 18) | 0xF0; /* 11110xxx */
610 n = 3;
611 } else {
612 goto invalid;
613 }
614
615 for(i=n,++sp; i>0; --i,++sp)
616 *sp = ((uc >> 6*(i-1)) & 0x3F) | 0x80; /* 10xxxxxx */
617
618 return n+1;
619 invalid:
620 /* U+FFFD */
621 *s++ = '\xEF';
622 *s++ = '\xBF';
623 *s = '\xBD';
624
625 return 3;
626 }
627
628 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
629 UTF-8 otherwise return 0 */
630 int
631 isfullutf8(char *s, int b) {
632 uchar *c1, *c2, *c3;
633
634 c1 = (uchar *)s;
635 c2 = (uchar *)++s;
636 c3 = (uchar *)++s;
637 if(b < 1) {
638 return 0;
639 } else if((*c1 & 0xE0) == 0xC0 && b == 1) {
640 return 0;
641 } else if((*c1 & 0xF0) == 0xE0 &&
642 ((b == 1) ||
643 ((b == 2) && (*c2 & 0xC0) == 0x80))) {
644 return 0;
645 } else if((*c1 & 0xF8) == 0xF0 &&
646 ((b == 1) ||
647 ((b == 2) && (*c2 & 0xC0) == 0x80) ||
648 ((b == 3) && (*c2 & 0xC0) == 0x80 && (*c3 & 0xC0) == 0x80))) {
649 return 0;
650 } else {
651 return 1;
652 }
653 }
654
655 int
656 utf8size(char *s) {
657 uchar c = *s;
658
659 if(~c & 0x80) {
660 return 1;
661 } else if((c & 0xE0) == 0xC0) {
662 return 2;
663 } else if((c & 0xF0) == 0xE0) {
664 return 3;
665 } else {
666 return 4;
667 }
668 }
669
670 static void
671 selinit(void) {
672 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
673 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
674 sel.mode = 0;
675 sel.ob.x = -1;
676 sel.clip = NULL;
677 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
678 if(sel.xtarget == None)
679 sel.xtarget = XA_STRING;
680 }
681
682 static int
683 x2col(int x) {
684 x -= borderpx;
685 x /= xw.cw;
686
687 return LIMIT(x, 0, term.col-1);
688 }
689
690 static int
691 y2row(int y) {
692 y -= borderpx;
693 y /= xw.ch;
694
695 return LIMIT(y, 0, term.row-1);
696 }
697
698 static void
699 selsort(void) {
700 if(sel.ob.y == sel.oe.y) {
701 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
702 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
703 } else {
704 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
705 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
706 }
707 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
708 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
709 }
710
711 static inline bool
712 selected(int x, int y) {
713 if(sel.ne.y == y && sel.nb.y == y)
714 return BETWEEN(x, sel.nb.x, sel.ne.x);
715
716 if(sel.type == SEL_RECTANGULAR) {
717 return ((sel.nb.y <= y && y <= sel.ne.y)
718 && (sel.nb.x <= x && x <= sel.ne.x));
719 }
720
721 return ((sel.nb.y < y && y < sel.ne.y)
722 || (y == sel.ne.y && x <= sel.ne.x))
723 || (y == sel.nb.y && x >= sel.nb.x
724 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
725 }
726
727 void
728 selsnap(int mode, int *x, int *y, int direction) {
729 int i;
730
731 switch(mode) {
732 case SNAP_WORD:
733 /*
734 * Snap around if the word wraps around at the end or
735 * beginning of a line.
736 */
737 for(;;) {
738 if(direction < 0 && *x <= 0) {
739 if(*y > 0 && term.line[*y - 1][term.col-1].mode
740 & ATTR_WRAP) {
741 *y -= 1;
742 *x = term.col-1;
743 } else {
744 break;
745 }
746 }
747 if(direction > 0 && *x >= term.col-1) {
748 if(*y < term.row-1 && term.line[*y][*x].mode
749 & ATTR_WRAP) {
750 *y += 1;
751 *x = 0;
752 } else {
753 break;
754 }
755 }
756
757 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
758 *x += direction;
759 continue;
760 }
761
762 if(strchr(worddelimiters,
763 term.line[*y][*x+direction].c[0])) {
764 break;
765 }
766
767 *x += direction;
768 }
769 break;
770 case SNAP_LINE:
771 /*
772 * Snap around if the the previous line or the current one
773 * has set ATTR_WRAP at its end. Then the whole next or
774 * previous line will be selected.
775 */
776 *x = (direction < 0) ? 0 : term.col - 1;
777 if(direction < 0 && *y > 0) {
778 for(; *y > 0; *y += direction) {
779 if(!(term.line[*y-1][term.col-1].mode
780 & ATTR_WRAP)) {
781 break;
782 }
783 }
784 } else if(direction > 0 && *y < term.row-1) {
785 for(; *y < term.row; *y += direction) {
786 if(!(term.line[*y][term.col-1].mode
787 & ATTR_WRAP)) {
788 break;
789 }
790 }
791 }
792 break;
793 default:
794 /*
795 * Select the whole line when the end of line is reached.
796 */
797 if(direction > 0) {
798 i = term.col;
799 while(--i > 0 && term.line[*y][i].c[0] == ' ')
800 /* nothing */;
801 if(i > 0 && i < *x)
802 *x = term.col - 1;
803 }
804 break;
805 }
806 }
807
808 void
809 getbuttoninfo(XEvent *e) {
810 int type;
811 uint state = e->xbutton.state &~Button1Mask;
812
813 sel.alt = IS_SET(MODE_ALTSCREEN);
814
815 sel.oe.x = x2col(e->xbutton.x);
816 sel.oe.y = y2row(e->xbutton.y);
817
818 if(sel.ob.y < sel.oe.y
819 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
820 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
821 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
822 } else {
823 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
824 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
825 }
826 selsort();
827
828 sel.type = SEL_REGULAR;
829 for(type = 1; type < LEN(selmasks); ++type) {
830 if(match(selmasks[type], state)) {
831 sel.type = type;
832 break;
833 }
834 }
835 }
836
837 void
838 mousereport(XEvent *e) {
839 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
840 button = e->xbutton.button, state = e->xbutton.state,
841 len;
842 char buf[40];
843 static int ox, oy;
844
845 /* from urxvt */
846 if(e->xbutton.type == MotionNotify) {
847 if(x == ox && y == oy)
848 return;
849 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
850 return;
851 /* MOUSE_MOTION: no reporting if no button is pressed */
852 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
853 return;
854
855 button = oldbutton + 32;
856 ox = x;
857 oy = y;
858 } else {
859 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
860 button = 3;
861 } else {
862 button -= Button1;
863 if(button >= 3)
864 button += 64 - 3;
865 }
866 if(e->xbutton.type == ButtonPress) {
867 oldbutton = button;
868 ox = x;
869 oy = y;
870 } else if(e->xbutton.type == ButtonRelease) {
871 oldbutton = 3;
872 /* MODE_MOUSEX10: no button release reporting */
873 if(IS_SET(MODE_MOUSEX10))
874 return;
875 }
876 }
877
878 if(!IS_SET(MODE_MOUSEX10)) {
879 button += (state & ShiftMask ? 4 : 0)
880 + (state & Mod4Mask ? 8 : 0)
881 + (state & ControlMask ? 16 : 0);
882 }
883
884 len = 0;
885 if(IS_SET(MODE_MOUSESGR)) {
886 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
887 button, x+1, y+1,
888 e->xbutton.type == ButtonRelease ? 'm' : 'M');
889 } else if(x < 223 && y < 223) {
890 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
891 32+button, 32+x+1, 32+y+1);
892 } else {
893 return;
894 }
895
896 ttywrite(buf, len);
897 }
898
899 void
900 bpress(XEvent *e) {
901 struct timeval now;
902 Mousekey *mk;
903
904 if(IS_SET(MODE_MOUSE)) {
905 mousereport(e);
906 return;
907 }
908
909 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
910 if(e->xbutton.button == mk->b
911 && match(mk->mask, e->xbutton.state)) {
912 ttysend(mk->s, strlen(mk->s));
913 return;
914 }
915 }
916
917 if(e->xbutton.button == Button1) {
918 gettimeofday(&now, NULL);
919
920 /* Clear previous selection, logically and visually. */
921 selclear(NULL);
922 sel.mode = 1;
923 sel.type = SEL_REGULAR;
924 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
925 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
926
927 /*
928 * If the user clicks below predefined timeouts specific
929 * snapping behaviour is exposed.
930 */
931 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
932 sel.snap = SNAP_LINE;
933 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
934 sel.snap = SNAP_WORD;
935 } else {
936 sel.snap = 0;
937 }
938 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
939 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
940 selsort();
941
942 /*
943 * Draw selection, unless it's regular and we don't want to
944 * make clicks visible
945 */
946 if(sel.snap != 0) {
947 sel.mode++;
948 tsetdirt(sel.nb.y, sel.ne.y);
949 }
950 sel.tclick2 = sel.tclick1;
951 sel.tclick1 = now;
952 }
953 }
954
955 void
956 selcopy(void) {
957 char *str, *ptr;
958 int x, y, bufsize, size, i, ex;
959 Glyph *gp, *last;
960
961 if(sel.ob.x == -1) {
962 str = NULL;
963 } else {
964 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
965 ptr = str = xmalloc(bufsize);
966
967 /* append every set & selected glyph to the selection */
968 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
969 gp = &term.line[y][0];
970 last = &gp[term.col-1];
971
972 while(last >= gp && !(selected(last - gp, y) &&
973 strcmp(last->c, " ") != 0)) {
974 --last;
975 }
976
977 for(x = 0; gp <= last; x++, ++gp) {
978 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
979 continue;
980
981 size = utf8size(gp->c);
982 memcpy(ptr, gp->c, size);
983 ptr += size;
984 }
985
986 /*
987 * Copy and pasting of line endings is inconsistent
988 * in the inconsistent terminal and GUI world.
989 * The best solution seems like to produce '\n' when
990 * something is copied from st and convert '\n' to
991 * '\r', when something to be pasted is received by
992 * st.
993 * FIXME: Fix the computer world.
994 */
995 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
996 *ptr++ = '\n';
997
998 /*
999 * If the last selected line expands in the selection
1000 * after the visible text '\n' is appended.
1001 */
1002 if(y == sel.ne.y) {
1003 i = term.col;
1004 while(--i > 0 && term.line[y][i].c[0] == ' ')
1005 /* nothing */;
1006 ex = sel.ne.x;
1007 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
1008 ex = sel.nb.x;
1009 if(i < ex)
1010 *ptr++ = '\n';
1011 }
1012 }
1013 *ptr = 0;
1014 }
1015 xsetsel(str);
1016 }
1017
1018 void
1019 selnotify(XEvent *e) {
1020 ulong nitems, ofs, rem;
1021 int format;
1022 uchar *data, *last, *repl;
1023 Atom type;
1024
1025 ofs = 0;
1026 do {
1027 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
1028 False, AnyPropertyType, &type, &format,
1029 &nitems, &rem, &data)) {
1030 fprintf(stderr, "Clipboard allocation failed\n");
1031 return;
1032 }
1033
1034 /*
1035 * As seen in selcopy:
1036 * Line endings are inconsistent in the terminal and GUI world
1037 * copy and pasting. When receiving some selection data,
1038 * replace all '\n' with '\r'.
1039 * FIXME: Fix the computer world.
1040 */
1041 repl = data;
1042 last = data + nitems * format / 8;
1043 while((repl = memchr(repl, '\n', last - repl))) {
1044 *repl++ = '\r';
1045 }
1046
1047 if(IS_SET(MODE_BRCKTPASTE))
1048 ttywrite("\033[200~", 6);
1049 ttysend((char *)data, nitems * format / 8);
1050 if(IS_SET(MODE_BRCKTPASTE))
1051 ttywrite("\033[201~", 6);
1052 XFree(data);
1053 /* number of 32-bit chunks returned */
1054 ofs += nitems * format / 32;
1055 } while(rem > 0);
1056 }
1057
1058 void
1059 selpaste(const Arg *dummy) {
1060 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1061 xw.win, CurrentTime);
1062 }
1063
1064 void
1065 clippaste(const Arg *dummy) {
1066 Atom clipboard;
1067
1068 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1069 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1070 xw.win, CurrentTime);
1071 }
1072
1073 void
1074 selclear(XEvent *e) {
1075 if(sel.ob.x == -1)
1076 return;
1077 sel.ob.x = -1;
1078 tsetdirt(sel.nb.y, sel.ne.y);
1079 }
1080
1081 void
1082 selrequest(XEvent *e) {
1083 XSelectionRequestEvent *xsre;
1084 XSelectionEvent xev;
1085 Atom xa_targets, string;
1086
1087 xsre = (XSelectionRequestEvent *) e;
1088 xev.type = SelectionNotify;
1089 xev.requestor = xsre->requestor;
1090 xev.selection = xsre->selection;
1091 xev.target = xsre->target;
1092 xev.time = xsre->time;
1093 /* reject */
1094 xev.property = None;
1095
1096 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1097 if(xsre->target == xa_targets) {
1098 /* respond with the supported type */
1099 string = sel.xtarget;
1100 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1101 XA_ATOM, 32, PropModeReplace,
1102 (uchar *) &string, 1);
1103 xev.property = xsre->property;
1104 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1105 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1106 xsre->target, 8, PropModeReplace,
1107 (uchar *) sel.clip, strlen(sel.clip));
1108 xev.property = xsre->property;
1109 }
1110
1111 /* all done, send a notification to the listener */
1112 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1113 fprintf(stderr, "Error sending SelectionNotify event\n");
1114 }
1115
1116 void
1117 xsetsel(char *str) {
1118 /* register the selection for both the clipboard and the primary */
1119 Atom clipboard;
1120
1121 free(sel.clip);
1122 sel.clip = str;
1123
1124 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1125
1126 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1127 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1128 }
1129
1130 void
1131 brelease(XEvent *e) {
1132 if(IS_SET(MODE_MOUSE)) {
1133 mousereport(e);
1134 return;
1135 }
1136
1137 if(e->xbutton.button == Button2) {
1138 selpaste(NULL);
1139 } else if(e->xbutton.button == Button1) {
1140 if(sel.mode < 2) {
1141 selclear(NULL);
1142 } else {
1143 getbuttoninfo(e);
1144 selcopy();
1145 }
1146 sel.mode = 0;
1147 tsetdirt(sel.nb.y, sel.ne.y);
1148 }
1149 }
1150
1151 void
1152 bmotion(XEvent *e) {
1153 int oldey, oldex, oldsby, oldsey;
1154
1155 if(IS_SET(MODE_MOUSE)) {
1156 mousereport(e);
1157 return;
1158 }
1159
1160 if(!sel.mode)
1161 return;
1162
1163 sel.mode++;
1164 oldey = sel.oe.y;
1165 oldex = sel.oe.x;
1166 oldsby = sel.nb.y;
1167 oldsey = sel.ne.y;
1168 getbuttoninfo(e);
1169
1170 if(oldey != sel.oe.y || oldex != sel.oe.x)
1171 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1172 }
1173
1174 void
1175 die(const char *errstr, ...) {
1176 va_list ap;
1177
1178 va_start(ap, errstr);
1179 vfprintf(stderr, errstr, ap);
1180 va_end(ap);
1181 exit(EXIT_FAILURE);
1182 }
1183
1184 void
1185 execsh(void) {
1186 char **args;
1187 char *envshell = getenv("SHELL");
1188 const struct passwd *pass = getpwuid(getuid());
1189 char buf[sizeof(long) * 8 + 1];
1190
1191 unsetenv("COLUMNS");
1192 unsetenv("LINES");
1193 unsetenv("TERMCAP");
1194
1195 if(pass) {
1196 setenv("LOGNAME", pass->pw_name, 1);
1197 setenv("USER", pass->pw_name, 1);
1198 setenv("SHELL", pass->pw_shell, 0);
1199 setenv("HOME", pass->pw_dir, 0);
1200 }
1201
1202 snprintf(buf, sizeof(buf), "%lu", xw.win);
1203 setenv("WINDOWID", buf, 1);
1204
1205 signal(SIGCHLD, SIG_DFL);
1206 signal(SIGHUP, SIG_DFL);
1207 signal(SIGINT, SIG_DFL);
1208 signal(SIGQUIT, SIG_DFL);
1209 signal(SIGTERM, SIG_DFL);
1210 signal(SIGALRM, SIG_DFL);
1211
1212 DEFAULT(envshell, shell);
1213 setenv("TERM", termname, 1);
1214 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1215 execvp(args[0], args);
1216 exit(EXIT_FAILURE);
1217 }
1218
1219 void
1220 sigchld(int a) {
1221 int stat = 0;
1222
1223 if(waitpid(pid, &stat, 0) < 0)
1224 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1225
1226 if(WIFEXITED(stat)) {
1227 exit(WEXITSTATUS(stat));
1228 } else {
1229 exit(EXIT_FAILURE);
1230 }
1231 }
1232
1233 void
1234 ttynew(void) {
1235 int m, s;
1236 struct winsize w = {term.row, term.col, 0, 0};
1237
1238 /* seems to work fine on linux, openbsd and freebsd */
1239 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1240 die("openpty failed: %s\n", SERRNO);
1241
1242 switch(pid = fork()) {
1243 case -1:
1244 die("fork failed\n");
1245 break;
1246 case 0:
1247 setsid(); /* create a new process group */
1248 dup2(s, STDIN_FILENO);
1249 dup2(s, STDOUT_FILENO);
1250 dup2(s, STDERR_FILENO);
1251 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1252 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1253 close(s);
1254 close(m);
1255 execsh();
1256 break;
1257 default:
1258 close(s);
1259 cmdfd = m;
1260 signal(SIGCHLD, sigchld);
1261 if(opt_io) {
1262 term.mode |= MODE_PRINT;
1263 iofd = (!strcmp(opt_io, "-")) ?
1264 STDOUT_FILENO :
1265 open(opt_io, O_WRONLY | O_CREAT, 0666);
1266 if(iofd < 0) {
1267 fprintf(stderr, "Error opening %s:%s\n",
1268 opt_io, strerror(errno));
1269 }
1270 }
1271 }
1272 }
1273
1274 void
1275 dump(char c) {
1276 static int col;
1277
1278 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1279 if(++col % 10 == 0)
1280 fprintf(stderr, "\n");
1281 }
1282
1283 void
1284 ttyread(void) {
1285 static char buf[BUFSIZ];
1286 static int buflen = 0;
1287 char *ptr;
1288 char s[UTF_SIZ];
1289 int charsize; /* size of utf8 char in bytes */
1290 long utf8c;
1291 int ret;
1292
1293 /* append read bytes to unprocessed bytes */
1294 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1295 die("Couldn't read from shell: %s\n", SERRNO);
1296
1297 /* process every complete utf8 char */
1298 buflen += ret;
1299 ptr = buf;
1300 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1301 charsize = utf8decode(ptr, &utf8c);
1302 utf8encode(&utf8c, s);
1303 tputc(s, charsize);
1304 ptr += charsize;
1305 buflen -= charsize;
1306 }
1307
1308 /* keep any uncomplete utf8 char for the next call */
1309 memmove(buf, ptr, buflen);
1310 }
1311
1312 void
1313 ttywrite(const char *s, size_t n) {
1314 if(write(cmdfd, s, n) == -1)
1315 die("write error on tty: %s\n", SERRNO);
1316 }
1317
1318 void
1319 ttysend(char *s, size_t n) {
1320 ttywrite(s, n);
1321 if(IS_SET(MODE_ECHO))
1322 techo(s, n);
1323 }
1324
1325 void
1326 ttyresize(void) {
1327 struct winsize w;
1328
1329 w.ws_row = term.row;
1330 w.ws_col = term.col;
1331 w.ws_xpixel = xw.tw;
1332 w.ws_ypixel = xw.th;
1333 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1334 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1335 }
1336
1337 int
1338 tattrset(int attr) {
1339 int i, j;
1340
1341 for(i = 0; i < term.row-1; i++) {
1342 for(j = 0; j < term.col-1; j++) {
1343 if(term.line[i][j].mode & attr)
1344 return 1;
1345 }
1346 }
1347
1348 return 0;
1349 }
1350
1351 void
1352 tsetdirt(int top, int bot) {
1353 int i;
1354
1355 LIMIT(top, 0, term.row-1);
1356 LIMIT(bot, 0, term.row-1);
1357
1358 for(i = top; i <= bot; i++)
1359 term.dirty[i] = 1;
1360 }
1361
1362 void
1363 tsetdirtattr(int attr) {
1364 int i, j;
1365
1366 for(i = 0; i < term.row-1; i++) {
1367 for(j = 0; j < term.col-1; j++) {
1368 if(term.line[i][j].mode & attr) {
1369 tsetdirt(i, i);
1370 break;
1371 }
1372 }
1373 }
1374 }
1375
1376 void
1377 tfulldirt(void) {
1378 tsetdirt(0, term.row-1);
1379 }
1380
1381 void
1382 tcursor(int mode) {
1383 static TCursor c[2];
1384 bool alt = IS_SET(MODE_ALTSCREEN);
1385
1386 if(mode == CURSOR_SAVE) {
1387 c[alt] = term.c;
1388 } else if(mode == CURSOR_LOAD) {
1389 term.c = c[alt];
1390 tmoveto(c[alt].x, c[alt].y);
1391 }
1392 }
1393
1394 void
1395 treset(void) {
1396 uint i;
1397
1398 term.c = (TCursor){{
1399 .mode = ATTR_NULL,
1400 .fg = defaultfg,
1401 .bg = defaultbg
1402 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1403
1404 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1405 for(i = tabspaces; i < term.col; i += tabspaces)
1406 term.tabs[i] = 1;
1407 term.top = 0;
1408 term.bot = term.row - 1;
1409 term.mode = MODE_WRAP;
1410 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1411 term.charset = 0;
1412
1413 tclearregion(0, 0, term.col-1, term.row-1);
1414 tmoveto(0, 0);
1415 tcursor(CURSOR_SAVE);
1416 }
1417
1418 void
1419 tnew(int col, int row) {
1420 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1421 tresize(col, row);
1422 term.numlock = 1;
1423
1424 treset();
1425 }
1426
1427 void
1428 tswapscreen(void) {
1429 Line *tmp = term.line;
1430
1431 term.line = term.alt;
1432 term.alt = tmp;
1433 term.mode ^= MODE_ALTSCREEN;
1434 tfulldirt();
1435 }
1436
1437 void
1438 tscrolldown(int orig, int n) {
1439 int i;
1440 Line temp;
1441
1442 LIMIT(n, 0, term.bot-orig+1);
1443
1444 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1445
1446 for(i = term.bot; i >= orig+n; i--) {
1447 temp = term.line[i];
1448 term.line[i] = term.line[i-n];
1449 term.line[i-n] = temp;
1450
1451 term.dirty[i] = 1;
1452 term.dirty[i-n] = 1;
1453 }
1454
1455 selscroll(orig, n);
1456 }
1457
1458 void
1459 tscrollup(int orig, int n) {
1460 int i;
1461 Line temp;
1462 LIMIT(n, 0, term.bot-orig+1);
1463
1464 tclearregion(0, orig, term.col-1, orig+n-1);
1465
1466 for(i = orig; i <= term.bot-n; i++) {
1467 temp = term.line[i];
1468 term.line[i] = term.line[i+n];
1469 term.line[i+n] = temp;
1470
1471 term.dirty[i] = 1;
1472 term.dirty[i+n] = 1;
1473 }
1474
1475 selscroll(orig, -n);
1476 }
1477
1478 void
1479 selscroll(int orig, int n) {
1480 if(sel.ob.x == -1)
1481 return;
1482
1483 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1484 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1485 selclear(NULL);
1486 return;
1487 }
1488 if(sel.type == SEL_RECTANGULAR) {
1489 if(sel.ob.y < term.top)
1490 sel.ob.y = term.top;
1491 if(sel.oe.y > term.bot)
1492 sel.oe.y = term.bot;
1493 } else {
1494 if(sel.ob.y < term.top) {
1495 sel.ob.y = term.top;
1496 sel.ob.x = 0;
1497 }
1498 if(sel.oe.y > term.bot) {
1499 sel.oe.y = term.bot;
1500 sel.oe.x = term.col;
1501 }
1502 }
1503 selsort();
1504 }
1505 }
1506
1507 void
1508 tnewline(int first_col) {
1509 int y = term.c.y;
1510
1511 if(y == term.bot) {
1512 tscrollup(term.top, 1);
1513 } else {
1514 y++;
1515 }
1516 tmoveto(first_col ? 0 : term.c.x, y);
1517 }
1518
1519 void
1520 csiparse(void) {
1521 char *p = csiescseq.buf, *np;
1522 long int v;
1523
1524 csiescseq.narg = 0;
1525 if(*p == '?') {
1526 csiescseq.priv = 1;
1527 p++;
1528 }
1529
1530 csiescseq.buf[csiescseq.len] = '\0';
1531 while(p < csiescseq.buf+csiescseq.len) {
1532 np = NULL;
1533 v = strtol(p, &np, 10);
1534 if(np == p)
1535 v = 0;
1536 if(v == LONG_MAX || v == LONG_MIN)
1537 v = -1;
1538 csiescseq.arg[csiescseq.narg++] = v;
1539 p = np;
1540 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1541 break;
1542 p++;
1543 }
1544 csiescseq.mode = *p;
1545 }
1546
1547 /* for absolute user moves, when decom is set */
1548 void
1549 tmoveato(int x, int y) {
1550 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1551 }
1552
1553 void
1554 tmoveto(int x, int y) {
1555 int miny, maxy;
1556
1557 if(term.c.state & CURSOR_ORIGIN) {
1558 miny = term.top;
1559 maxy = term.bot;
1560 } else {
1561 miny = 0;
1562 maxy = term.row - 1;
1563 }
1564 LIMIT(x, 0, term.col-1);
1565 LIMIT(y, miny, maxy);
1566 term.c.state &= ~CURSOR_WRAPNEXT;
1567 term.c.x = x;
1568 term.c.y = y;
1569 }
1570
1571 void
1572 tsetchar(char *c, Glyph *attr, int x, int y) {
1573 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1574 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1575 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1576 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1577 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1578 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1579 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1580 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1581 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1582 };
1583
1584 /*
1585 * The table is proudly stolen from rxvt.
1586 */
1587 if(attr->mode & ATTR_GFX) {
1588 if(c[0] >= 0x41 && c[0] <= 0x7e
1589 && vt100_0[c[0] - 0x41]) {
1590 c = vt100_0[c[0] - 0x41];
1591 }
1592 }
1593
1594 if(term.line[y][x].mode & ATTR_WIDE) {
1595 if(x+1 < term.col) {
1596 term.line[y][x+1].c[0] = ' ';
1597 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1598 }
1599 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1600 term.line[y][x-1].c[0] = ' ';
1601 term.line[y][x-1].mode &= ~ATTR_WIDE;
1602 }
1603
1604 term.dirty[y] = 1;
1605 term.line[y][x] = *attr;
1606 memcpy(term.line[y][x].c, c, UTF_SIZ);
1607 }
1608
1609 void
1610 tclearregion(int x1, int y1, int x2, int y2) {
1611 int x, y, temp;
1612
1613 if(x1 > x2)
1614 temp = x1, x1 = x2, x2 = temp;
1615 if(y1 > y2)
1616 temp = y1, y1 = y2, y2 = temp;
1617
1618 LIMIT(x1, 0, term.col-1);
1619 LIMIT(x2, 0, term.col-1);
1620 LIMIT(y1, 0, term.row-1);
1621 LIMIT(y2, 0, term.row-1);
1622
1623 for(y = y1; y <= y2; y++) {
1624 term.dirty[y] = 1;
1625 for(x = x1; x <= x2; x++) {
1626 if(selected(x, y))
1627 selclear(NULL);
1628 term.line[y][x] = term.c.attr;
1629 memcpy(term.line[y][x].c, " ", 2);
1630 }
1631 }
1632 }
1633
1634 void
1635 tdeletechar(int n) {
1636 int src = term.c.x + n;
1637 int dst = term.c.x;
1638 int size = term.col - src;
1639
1640 term.dirty[term.c.y] = 1;
1641
1642 if(src >= term.col) {
1643 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1644 return;
1645 }
1646
1647 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1648 size * sizeof(Glyph));
1649 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1650 }
1651
1652 void
1653 tinsertblank(int n) {
1654 int src = term.c.x;
1655 int dst = src + n;
1656 int size = term.col - dst;
1657
1658 term.dirty[term.c.y] = 1;
1659
1660 if(dst >= term.col) {
1661 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1662 return;
1663 }
1664
1665 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1666 size * sizeof(Glyph));
1667 tclearregion(src, term.c.y, dst - 1, term.c.y);
1668 }
1669
1670 void
1671 tinsertblankline(int n) {
1672 if(term.c.y < term.top || term.c.y > term.bot)
1673 return;
1674
1675 tscrolldown(term.c.y, n);
1676 }
1677
1678 void
1679 tdeleteline(int n) {
1680 if(term.c.y < term.top || term.c.y > term.bot)
1681 return;
1682
1683 tscrollup(term.c.y, n);
1684 }
1685
1686 int32_t
1687 tdefcolor(int *attr, int *npar, int l) {
1688 int32_t idx = -1;
1689 uint r, g, b;
1690
1691 switch (attr[*npar + 1]) {
1692 case 2: /* direct colour in RGB space */
1693 if (*npar + 4 >= l) {
1694 fprintf(stderr,
1695 "erresc(38): Incorrect number of parameters (%d)\n",
1696 *npar);
1697 break;
1698 }
1699 r = attr[*npar + 2];
1700 g = attr[*npar + 3];
1701 b = attr[*npar + 4];
1702 *npar += 4;
1703 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1704 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1705 r, g, b);
1706 else
1707 idx = TRUECOLOR(r, g, b);
1708 break;
1709 case 5: /* indexed colour */
1710 if (*npar + 2 >= l) {
1711 fprintf(stderr,
1712 "erresc(38): Incorrect number of parameters (%d)\n",
1713 *npar);
1714 break;
1715 }
1716 *npar += 2;
1717 if(!BETWEEN(attr[*npar], 0, 255))
1718 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1719 else
1720 idx = attr[*npar];
1721 break;
1722 case 0: /* implemented defined (only foreground) */
1723 case 1: /* transparent */
1724 case 3: /* direct colour in CMY space */
1725 case 4: /* direct colour in CMYK space */
1726 default:
1727 fprintf(stderr,
1728 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1729 }
1730
1731 return idx;
1732 }
1733
1734 void
1735 tsetattr(int *attr, int l) {
1736 int i;
1737 int32_t idx;
1738
1739 for(i = 0; i < l; i++) {
1740 switch(attr[i]) {
1741 case 0:
1742 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1743 | ATTR_BOLD | ATTR_ITALIC \
1744 | ATTR_BLINK);
1745 term.c.attr.fg = defaultfg;
1746 term.c.attr.bg = defaultbg;
1747 break;
1748 case 1:
1749 term.c.attr.mode |= ATTR_BOLD;
1750 break;
1751 case 3:
1752 term.c.attr.mode |= ATTR_ITALIC;
1753 break;
1754 case 4:
1755 term.c.attr.mode |= ATTR_UNDERLINE;
1756 break;
1757 case 5: /* slow blink */
1758 case 6: /* rapid blink */
1759 term.c.attr.mode |= ATTR_BLINK;
1760 break;
1761 case 7:
1762 term.c.attr.mode |= ATTR_REVERSE;
1763 break;
1764 case 21:
1765 case 22:
1766 term.c.attr.mode &= ~ATTR_BOLD;
1767 break;
1768 case 23:
1769 term.c.attr.mode &= ~ATTR_ITALIC;
1770 break;
1771 case 24:
1772 term.c.attr.mode &= ~ATTR_UNDERLINE;
1773 break;
1774 case 25:
1775 case 26:
1776 term.c.attr.mode &= ~ATTR_BLINK;
1777 break;
1778 case 27:
1779 term.c.attr.mode &= ~ATTR_REVERSE;
1780 break;
1781 case 38:
1782 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1783 term.c.attr.fg = idx;
1784 break;
1785 case 39:
1786 term.c.attr.fg = defaultfg;
1787 break;
1788 case 48:
1789 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1790 term.c.attr.bg = idx;
1791 break;
1792 case 49:
1793 term.c.attr.bg = defaultbg;
1794 break;
1795 default:
1796 if(BETWEEN(attr[i], 30, 37)) {
1797 term.c.attr.fg = attr[i] - 30;
1798 } else if(BETWEEN(attr[i], 40, 47)) {
1799 term.c.attr.bg = attr[i] - 40;
1800 } else if(BETWEEN(attr[i], 90, 97)) {
1801 term.c.attr.fg = attr[i] - 90 + 8;
1802 } else if(BETWEEN(attr[i], 100, 107)) {
1803 term.c.attr.bg = attr[i] - 100 + 8;
1804 } else {
1805 fprintf(stderr,
1806 "erresc(default): gfx attr %d unknown\n",
1807 attr[i]), csidump();
1808 }
1809 break;
1810 }
1811 }
1812 }
1813
1814 void
1815 tsetscroll(int t, int b) {
1816 int temp;
1817
1818 LIMIT(t, 0, term.row-1);
1819 LIMIT(b, 0, term.row-1);
1820 if(t > b) {
1821 temp = t;
1822 t = b;
1823 b = temp;
1824 }
1825 term.top = t;
1826 term.bot = b;
1827 }
1828
1829 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1830
1831 void
1832 tsetmode(bool priv, bool set, int *args, int narg) {
1833 int *lim, mode;
1834 bool alt;
1835
1836 for(lim = args + narg; args < lim; ++args) {
1837 if(priv) {
1838 switch(*args) {
1839 break;
1840 case 1: /* DECCKM -- Cursor key */
1841 MODBIT(term.mode, set, MODE_APPCURSOR);
1842 break;
1843 case 5: /* DECSCNM -- Reverse video */
1844 mode = term.mode;
1845 MODBIT(term.mode, set, MODE_REVERSE);
1846 if(mode != term.mode)
1847 redraw(REDRAW_TIMEOUT);
1848 break;
1849 case 6: /* DECOM -- Origin */
1850 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1851 tmoveato(0, 0);
1852 break;
1853 case 7: /* DECAWM -- Auto wrap */
1854 MODBIT(term.mode, set, MODE_WRAP);
1855 break;
1856 case 0: /* Error (IGNORED) */
1857 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1858 case 3: /* DECCOLM -- Column (IGNORED) */
1859 case 4: /* DECSCLM -- Scroll (IGNORED) */
1860 case 8: /* DECARM -- Auto repeat (IGNORED) */
1861 case 18: /* DECPFF -- Printer feed (IGNORED) */
1862 case 19: /* DECPEX -- Printer extent (IGNORED) */
1863 case 42: /* DECNRCM -- National characters (IGNORED) */
1864 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1865 break;
1866 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1867 MODBIT(term.mode, !set, MODE_HIDE);
1868 break;
1869 case 9: /* X10 mouse compatibility mode */
1870 xsetpointermotion(0);
1871 MODBIT(term.mode, 0, MODE_MOUSE);
1872 MODBIT(term.mode, set, MODE_MOUSEX10);
1873 break;
1874 case 1000: /* 1000: report button press */
1875 xsetpointermotion(0);
1876 MODBIT(term.mode, 0, MODE_MOUSE);
1877 MODBIT(term.mode, set, MODE_MOUSEBTN);
1878 break;
1879 case 1002: /* 1002: report motion on button press */
1880 xsetpointermotion(0);
1881 MODBIT(term.mode, 0, MODE_MOUSE);
1882 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1883 break;
1884 case 1003: /* 1003: enable all mouse motions */
1885 xsetpointermotion(set);
1886 MODBIT(term.mode, 0, MODE_MOUSE);
1887 MODBIT(term.mode, set, MODE_MOUSEMANY);
1888 break;
1889 case 1004: /* 1004: send focus events to tty */
1890 MODBIT(term.mode, set, MODE_FOCUS);
1891 break;
1892 case 1006: /* 1006: extended reporting mode */
1893 MODBIT(term.mode, set, MODE_MOUSESGR);
1894 break;
1895 case 1034:
1896 MODBIT(term.mode, set, MODE_8BIT);
1897 break;
1898 case 1049: /* swap screen & set/restore cursor as xterm */
1899 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1900 case 47: /* swap screen */
1901 case 1047:
1902 if (!allowaltscreen)
1903 break;
1904 alt = IS_SET(MODE_ALTSCREEN);
1905 if(alt) {
1906 tclearregion(0, 0, term.col-1,
1907 term.row-1);
1908 }
1909 if(set ^ alt) /* set is always 1 or 0 */
1910 tswapscreen();
1911 if(*args != 1049)
1912 break;
1913 /* FALLTRU */
1914 case 1048:
1915 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1916 break;
1917 case 2004: /* 2004: bracketed paste mode */
1918 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1919 break;
1920 /* Not implemented mouse modes. See comments there. */
1921 case 1001: /* mouse highlight mode; can hang the
1922 terminal by design when implemented. */
1923 case 1005: /* UTF-8 mouse mode; will confuse
1924 applications not supporting UTF-8
1925 and luit. */
1926 case 1015: /* urxvt mangled mouse mode; incompatible
1927 and can be mistaken for other control
1928 codes. */
1929 default:
1930 fprintf(stderr,
1931 "erresc: unknown private set/reset mode %d\n",
1932 *args);
1933 break;
1934 }
1935 } else {
1936 switch(*args) {
1937 case 0: /* Error (IGNORED) */
1938 break;
1939 case 2: /* KAM -- keyboard action */
1940 MODBIT(term.mode, set, MODE_KBDLOCK);
1941 break;
1942 case 4: /* IRM -- Insertion-replacement */
1943 MODBIT(term.mode, set, MODE_INSERT);
1944 break;
1945 case 12: /* SRM -- Send/Receive */
1946 MODBIT(term.mode, !set, MODE_ECHO);
1947 break;
1948 case 20: /* LNM -- Linefeed/new line */
1949 MODBIT(term.mode, set, MODE_CRLF);
1950 break;
1951 default:
1952 fprintf(stderr,
1953 "erresc: unknown set/reset mode %d\n",
1954 *args);
1955 break;
1956 }
1957 }
1958 }
1959 }
1960
1961 void
1962 csihandle(void) {
1963 char buf[40];
1964 int len;
1965
1966 switch(csiescseq.mode) {
1967 default:
1968 unknown:
1969 fprintf(stderr, "erresc: unknown csi ");
1970 csidump();
1971 /* die(""); */
1972 break;
1973 case '@': /* ICH -- Insert <n> blank char */
1974 DEFAULT(csiescseq.arg[0], 1);
1975 tinsertblank(csiescseq.arg[0]);
1976 break;
1977 case 'A': /* CUU -- Cursor <n> Up */
1978 DEFAULT(csiescseq.arg[0], 1);
1979 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1980 break;
1981 case 'B': /* CUD -- Cursor <n> Down */
1982 case 'e': /* VPR --Cursor <n> Down */
1983 DEFAULT(csiescseq.arg[0], 1);
1984 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1985 break;
1986 case 'i': /* MC -- Media Copy */
1987 switch(csiescseq.arg[0]) {
1988 case 0:
1989 case 1:
1990 tdumpline(term.c.y);
1991 break;
1992 case 4:
1993 term.mode &= ~MODE_PRINT;
1994 break;
1995 case 5:
1996 term.mode |= MODE_PRINT;
1997 break;
1998 }
1999 break;
2000 case 'c': /* DA -- Device Attributes */
2001 if(csiescseq.arg[0] == 0)
2002 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2003 break;
2004 case 'C': /* CUF -- Cursor <n> Forward */
2005 case 'a': /* HPR -- Cursor <n> Forward */
2006 DEFAULT(csiescseq.arg[0], 1);
2007 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2008 break;
2009 case 'D': /* CUB -- Cursor <n> Backward */
2010 DEFAULT(csiescseq.arg[0], 1);
2011 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2012 break;
2013 case 'E': /* CNL -- Cursor <n> Down and first col */
2014 DEFAULT(csiescseq.arg[0], 1);
2015 tmoveto(0, term.c.y+csiescseq.arg[0]);
2016 break;
2017 case 'F': /* CPL -- Cursor <n> Up and first col */
2018 DEFAULT(csiescseq.arg[0], 1);
2019 tmoveto(0, term.c.y-csiescseq.arg[0]);
2020 break;
2021 case 'g': /* TBC -- Tabulation clear */
2022 switch(csiescseq.arg[0]) {
2023 case 0: /* clear current tab stop */
2024 term.tabs[term.c.x] = 0;
2025 break;
2026 case 3: /* clear all the tabs */
2027 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2028 break;
2029 default:
2030 goto unknown;
2031 }
2032 break;
2033 case 'G': /* CHA -- Move to <col> */
2034 case '`': /* HPA */
2035 DEFAULT(csiescseq.arg[0], 1);
2036 tmoveto(csiescseq.arg[0]-1, term.c.y);
2037 break;
2038 case 'H': /* CUP -- Move to <row> <col> */
2039 case 'f': /* HVP */
2040 DEFAULT(csiescseq.arg[0], 1);
2041 DEFAULT(csiescseq.arg[1], 1);
2042 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2043 break;
2044 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2045 DEFAULT(csiescseq.arg[0], 1);
2046 while(csiescseq.arg[0]--)
2047 tputtab(1);
2048 break;
2049 case 'J': /* ED -- Clear screen */
2050 selclear(NULL);
2051 switch(csiescseq.arg[0]) {
2052 case 0: /* below */
2053 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2054 if(term.c.y < term.row-1) {
2055 tclearregion(0, term.c.y+1, term.col-1,
2056 term.row-1);
2057 }
2058 break;
2059 case 1: /* above */
2060 if(term.c.y > 1)
2061 tclearregion(0, 0, term.col-1, term.c.y-1);
2062 tclearregion(0, term.c.y, term.c.x, term.c.y);
2063 break;
2064 case 2: /* all */
2065 tclearregion(0, 0, term.col-1, term.row-1);
2066 break;
2067 default:
2068 goto unknown;
2069 }
2070 break;
2071 case 'K': /* EL -- Clear line */
2072 switch(csiescseq.arg[0]) {
2073 case 0: /* right */
2074 tclearregion(term.c.x, term.c.y, term.col-1,
2075 term.c.y);
2076 break;
2077 case 1: /* left */
2078 tclearregion(0, term.c.y, term.c.x, term.c.y);
2079 break;
2080 case 2: /* all */
2081 tclearregion(0, term.c.y, term.col-1, term.c.y);
2082 break;
2083 }
2084 break;
2085 case 'S': /* SU -- Scroll <n> line up */
2086 DEFAULT(csiescseq.arg[0], 1);
2087 tscrollup(term.top, csiescseq.arg[0]);
2088 break;
2089 case 'T': /* SD -- Scroll <n> line down */
2090 DEFAULT(csiescseq.arg[0], 1);
2091 tscrolldown(term.top, csiescseq.arg[0]);
2092 break;
2093 case 'L': /* IL -- Insert <n> blank lines */
2094 DEFAULT(csiescseq.arg[0], 1);
2095 tinsertblankline(csiescseq.arg[0]);
2096 break;
2097 case 'l': /* RM -- Reset Mode */
2098 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2099 break;
2100 case 'M': /* DL -- Delete <n> lines */
2101 DEFAULT(csiescseq.arg[0], 1);
2102 tdeleteline(csiescseq.arg[0]);
2103 break;
2104 case 'X': /* ECH -- Erase <n> char */
2105 DEFAULT(csiescseq.arg[0], 1);
2106 tclearregion(term.c.x, term.c.y,
2107 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2108 break;
2109 case 'P': /* DCH -- Delete <n> char */
2110 DEFAULT(csiescseq.arg[0], 1);
2111 tdeletechar(csiescseq.arg[0]);
2112 break;
2113 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2114 DEFAULT(csiescseq.arg[0], 1);
2115 while(csiescseq.arg[0]--)
2116 tputtab(0);
2117 break;
2118 case 'd': /* VPA -- Move to <row> */
2119 DEFAULT(csiescseq.arg[0], 1);
2120 tmoveato(term.c.x, csiescseq.arg[0]-1);
2121 break;
2122 case 'h': /* SM -- Set terminal mode */
2123 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2124 break;
2125 case 'm': /* SGR -- Terminal attribute (color) */
2126 tsetattr(csiescseq.arg, csiescseq.narg);
2127 break;
2128 case 'n': /* DSR – Device Status Report (cursor position) */
2129 if (csiescseq.arg[0] == 6) {
2130 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2131 term.c.y+1, term.c.x+1);
2132 ttywrite(buf, len);
2133 break;
2134 }
2135 case 'r': /* DECSTBM -- Set Scrolling Region */
2136 if(csiescseq.priv) {
2137 goto unknown;
2138 } else {
2139 DEFAULT(csiescseq.arg[0], 1);
2140 DEFAULT(csiescseq.arg[1], term.row);
2141 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2142 tmoveato(0, 0);
2143 }
2144 break;
2145 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2146 tcursor(CURSOR_SAVE);
2147 break;
2148 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2149 tcursor(CURSOR_LOAD);
2150 break;
2151 }
2152 }
2153
2154 void
2155 csidump(void) {
2156 int i;
2157 uint c;
2158
2159 printf("ESC[");
2160 for(i = 0; i < csiescseq.len; i++) {
2161 c = csiescseq.buf[i] & 0xff;
2162 if(isprint(c)) {
2163 putchar(c);
2164 } else if(c == '\n') {
2165 printf("(\\n)");
2166 } else if(c == '\r') {
2167 printf("(\\r)");
2168 } else if(c == 0x1b) {
2169 printf("(\\e)");
2170 } else {
2171 printf("(%02x)", c);
2172 }
2173 }
2174 putchar('\n');
2175 }
2176
2177 void
2178 csireset(void) {
2179 memset(&csiescseq, 0, sizeof(csiescseq));
2180 }
2181
2182 void
2183 strhandle(void) {
2184 char *p = NULL;
2185 int j, narg, par;
2186
2187 strparse();
2188 narg = strescseq.narg;
2189 par = atoi(strescseq.args[0]);
2190
2191 switch(strescseq.type) {
2192 case ']': /* OSC -- Operating System Command */
2193 switch(par) {
2194 case 0:
2195 case 1:
2196 case 2:
2197 if(narg > 1)
2198 xsettitle(strescseq.args[1]);
2199 return;
2200 case 4: /* color set */
2201 if(narg < 3)
2202 break;
2203 p = strescseq.args[2];
2204 /* fall through */
2205 case 104: /* color reset, here p = NULL */
2206 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2207 if (!xsetcolorname(j, p)) {
2208 fprintf(stderr, "erresc: invalid color %s\n", p);
2209 } else {
2210 /*
2211 * TODO if defaultbg color is changed, borders
2212 * are dirty
2213 */
2214 redraw(0);
2215 }
2216 return;
2217 }
2218 break;
2219 case 'k': /* old title set compatibility */
2220 xsettitle(strescseq.args[0]);
2221 return;
2222 case 'P': /* DSC -- Device Control String */
2223 case '_': /* APC -- Application Program Command */
2224 case '^': /* PM -- Privacy Message */
2225 return;
2226 }
2227
2228 fprintf(stderr, "erresc: unknown str ");
2229 strdump();
2230 }
2231
2232 void
2233 strparse(void) {
2234 char *p = strescseq.buf;
2235
2236 strescseq.narg = 0;
2237 strescseq.buf[strescseq.len] = '\0';
2238 while(p && strescseq.narg < STR_ARG_SIZ)
2239 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2240 }
2241
2242 void
2243 strdump(void) {
2244 int i;
2245 uint c;
2246
2247 printf("ESC%c", strescseq.type);
2248 for(i = 0; i < strescseq.len; i++) {
2249 c = strescseq.buf[i] & 0xff;
2250 if(c == '\0') {
2251 return;
2252 } else if(isprint(c)) {
2253 putchar(c);
2254 } else if(c == '\n') {
2255 printf("(\\n)");
2256 } else if(c == '\r') {
2257 printf("(\\r)");
2258 } else if(c == 0x1b) {
2259 printf("(\\e)");
2260 } else {
2261 printf("(%02x)", c);
2262 }
2263 }
2264 printf("ESC\\\n");
2265 }
2266
2267 void
2268 strreset(void) {
2269 memset(&strescseq, 0, sizeof(strescseq));
2270 }
2271
2272 void
2273 tprinter(char *s, size_t len) {
2274 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2275 fprintf(stderr, "Error writing in %s:%s\n",
2276 opt_io, strerror(errno));
2277 close(iofd);
2278 iofd = -1;
2279 }
2280 }
2281
2282 void
2283 tdumpline(int n) {
2284 Glyph *bp, *end;
2285
2286 bp = &term.line[n][0];
2287 end = &bp[term.col-1];
2288 while(end > bp && !strcmp(" ", end->c))
2289 --end;
2290 if(bp != end || strcmp(bp->c, " ")) {
2291 for( ;bp <= end; ++bp)
2292 tprinter(bp->c, strlen(bp->c));
2293 }
2294 tprinter("\n", 1);
2295 }
2296
2297 void
2298 tputtab(bool forward) {
2299 uint x = term.c.x;
2300
2301 if(forward) {
2302 if(x == term.col)
2303 return;
2304 for(++x; x < term.col && !term.tabs[x]; ++x)
2305 /* nothing */ ;
2306 } else {
2307 if(x == 0)
2308 return;
2309 for(--x; x > 0 && !term.tabs[x]; --x)
2310 /* nothing */ ;
2311 }
2312 tmoveto(x, term.c.y);
2313 }
2314
2315 void
2316 techo(char *buf, int len) {
2317 for(; len > 0; buf++, len--) {
2318 char c = *buf;
2319
2320 if(c == '\033') { /* escape */
2321 tputc("^", 1);
2322 tputc("[", 1);
2323 } else if(c < '\x20') { /* control code */
2324 if(c != '\n' && c != '\r' && c != '\t') {
2325 c |= '\x40';
2326 tputc("^", 1);
2327 }
2328 tputc(&c, 1);
2329 } else {
2330 break;
2331 }
2332 }
2333 if(len)
2334 tputc(buf, len);
2335 }
2336
2337 void
2338 tdeftran(char ascii) {
2339 char c, (*bp)[2];
2340 static char tbl[][2] = {
2341 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2342 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2343 {'5', CS_FIN}, {'C', CS_FIN},
2344 {0, 0}
2345 };
2346
2347 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2348 /* nothing */;
2349
2350 if (c == 0)
2351 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2352 else
2353 term.trantbl[term.icharset] = (*bp)[1];
2354 }
2355
2356 void
2357 tselcs(void) {
2358 if (term.trantbl[term.charset] == CS_GRAPHIC0)
2359 term.c.attr.mode |= ATTR_GFX;
2360 else
2361 term.c.attr.mode &= ~ATTR_GFX;
2362 }
2363
2364 void
2365 tputc(char *c, int len) {
2366 uchar ascii = *c;
2367 bool control = ascii < '\x20' || ascii == 0177;
2368 long u8char;
2369 int width;
2370
2371 if(len == 1) {
2372 width = 1;
2373 } else {
2374 utf8decode(c, &u8char);
2375 width = wcwidth(u8char);
2376 }
2377
2378 if(IS_SET(MODE_PRINT))
2379 tprinter(c, len);
2380
2381 /*
2382 * STR sequences must be checked before anything else
2383 * because it can use some control codes as part of the sequence.
2384 */
2385 if(term.esc & ESC_STR) {
2386 switch(ascii) {
2387 case '\033':
2388 term.esc = ESC_START | ESC_STR_END;
2389 break;
2390 case '\a': /* backwards compatibility to xterm */
2391 term.esc = 0;
2392 strhandle();
2393 break;
2394 default:
2395 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2396 memmove(&strescseq.buf[strescseq.len], c, len);
2397 strescseq.len += len;
2398 } else {
2399 /*
2400 * Here is a bug in terminals. If the user never sends
2401 * some code to stop the str or esc command, then st
2402 * will stop responding. But this is better than
2403 * silently failing with unknown characters. At least
2404 * then users will report back.
2405 *
2406 * In the case users ever get fixed, here is the code:
2407 */
2408 /*
2409 * term.esc = 0;
2410 * strhandle();
2411 */
2412 }
2413 }
2414 return;
2415 }
2416
2417 /*
2418 * Actions of control codes must be performed as soon they arrive
2419 * because they can be embedded inside a control sequence, and
2420 * they must not cause conflicts with sequences.
2421 */
2422 if(control) {
2423 switch(ascii) {
2424 case '\t': /* HT */
2425 tputtab(1);
2426 return;
2427 case '\b': /* BS */
2428 tmoveto(term.c.x-1, term.c.y);
2429 return;
2430 case '\r': /* CR */
2431 tmoveto(0, term.c.y);
2432 return;
2433 case '\f': /* LF */
2434 case '\v': /* VT */
2435 case '\n': /* LF */
2436 /* go to first col if the mode is set */
2437 tnewline(IS_SET(MODE_CRLF));
2438 return;
2439 case '\a': /* BEL */
2440 if(!(xw.state & WIN_FOCUSED))
2441 xseturgency(1);
2442 if (bellvolume)
2443 XBell(xw.dpy, bellvolume);
2444 return;
2445 case '\033': /* ESC */
2446 csireset();
2447 term.esc = ESC_START;
2448 return;
2449 case '\016': /* SO */
2450 term.charset = 0;
2451 tselcs();
2452 return;
2453 case '\017': /* SI */
2454 term.charset = 1;
2455 tselcs();
2456 return;
2457 case '\032': /* SUB */
2458 case '\030': /* CAN */
2459 csireset();
2460 return;
2461 case '\005': /* ENQ (IGNORED) */
2462 case '\000': /* NUL (IGNORED) */
2463 case '\021': /* XON (IGNORED) */
2464 case '\023': /* XOFF (IGNORED) */
2465 case 0177: /* DEL (IGNORED) */
2466 return;
2467 }
2468 } else if(term.esc & ESC_START) {
2469 if(term.esc & ESC_CSI) {
2470 csiescseq.buf[csiescseq.len++] = ascii;
2471 if(BETWEEN(ascii, 0x40, 0x7E)
2472 || csiescseq.len >= \
2473 sizeof(csiescseq.buf)-1) {
2474 term.esc = 0;
2475 csiparse();
2476 csihandle();
2477 }
2478 } else if(term.esc & ESC_STR_END) {
2479 term.esc = 0;
2480 if(ascii == '\\')
2481 strhandle();
2482 } else if(term.esc & ESC_ALTCHARSET) {
2483 tdeftran(ascii);
2484 tselcs();
2485 term.esc = 0;
2486 } else if(term.esc & ESC_TEST) {
2487 if(ascii == '8') { /* DEC screen alignment test. */
2488 char E[UTF_SIZ] = "E";
2489 int x, y;
2490
2491 for(x = 0; x < term.col; ++x) {
2492 for(y = 0; y < term.row; ++y)
2493 tsetchar(E, &term.c.attr, x, y);
2494 }
2495 }
2496 term.esc = 0;
2497 } else {
2498 switch(ascii) {
2499 case '[':
2500 term.esc |= ESC_CSI;
2501 break;
2502 case '#':
2503 term.esc |= ESC_TEST;
2504 break;
2505 case 'P': /* DCS -- Device Control String */
2506 case '_': /* APC -- Application Program Command */
2507 case '^': /* PM -- Privacy Message */
2508 case ']': /* OSC -- Operating System Command */
2509 case 'k': /* old title set compatibility */
2510 strreset();
2511 strescseq.type = ascii;
2512 term.esc |= ESC_STR;
2513 break;
2514 case '(': /* set primary charset G0 */
2515 case ')': /* set secondary charset G1 */
2516 case '*': /* set tertiary charset G2 */
2517 case '+': /* set quaternary charset G3 */
2518 term.icharset = ascii - '(';
2519 term.esc |= ESC_ALTCHARSET;
2520 break;
2521 case 'D': /* IND -- Linefeed */
2522 if(term.c.y == term.bot) {
2523 tscrollup(term.top, 1);
2524 } else {
2525 tmoveto(term.c.x, term.c.y+1);
2526 }
2527 term.esc = 0;
2528 break;
2529 case 'E': /* NEL -- Next line */
2530 tnewline(1); /* always go to first col */
2531 term.esc = 0;
2532 break;
2533 case 'H': /* HTS -- Horizontal tab stop */
2534 term.tabs[term.c.x] = 1;
2535 term.esc = 0;
2536 break;
2537 case 'M': /* RI -- Reverse index */
2538 if(term.c.y == term.top) {
2539 tscrolldown(term.top, 1);
2540 } else {
2541 tmoveto(term.c.x, term.c.y-1);
2542 }
2543 term.esc = 0;
2544 break;
2545 case 'Z': /* DECID -- Identify Terminal */
2546 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2547 term.esc = 0;
2548 break;
2549 case 'c': /* RIS -- Reset to inital state */
2550 treset();
2551 term.esc = 0;
2552 xresettitle();
2553 xloadcols();
2554 break;
2555 case '=': /* DECPAM -- Application keypad */
2556 term.mode |= MODE_APPKEYPAD;
2557 term.esc = 0;
2558 break;
2559 case '>': /* DECPNM -- Normal keypad */
2560 term.mode &= ~MODE_APPKEYPAD;
2561 term.esc = 0;
2562 break;
2563 case '7': /* DECSC -- Save Cursor */
2564 tcursor(CURSOR_SAVE);
2565 term.esc = 0;
2566 break;
2567 case '8': /* DECRC -- Restore Cursor */
2568 tcursor(CURSOR_LOAD);
2569 term.esc = 0;
2570 break;
2571 case '\\': /* ST -- Stop */
2572 term.esc = 0;
2573 break;
2574 default:
2575 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2576 (uchar) ascii, isprint(ascii)? ascii:'.');
2577 term.esc = 0;
2578 }
2579 }
2580 /*
2581 * All characters which form part of a sequence are not
2582 * printed
2583 */
2584 return;
2585 }
2586 /*
2587 * Display control codes only if we are in graphic mode
2588 */
2589 if(control && !(term.c.attr.mode & ATTR_GFX))
2590 return;
2591 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2592 selclear(NULL);
2593 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2594 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2595 tnewline(1);
2596 }
2597
2598 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2599 memmove(&term.line[term.c.y][term.c.x+1],
2600 &term.line[term.c.y][term.c.x],
2601 (term.col - term.c.x - 1) * sizeof(Glyph));
2602 }
2603
2604 if(term.c.x+width > term.col)
2605 tnewline(1);
2606
2607 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2608
2609 if(width == 2) {
2610 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2611 if(term.c.x+1 < term.col) {
2612 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2613 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2614 }
2615 }
2616 if(term.c.x+width < term.col) {
2617 tmoveto(term.c.x+width, term.c.y);
2618 } else {
2619 term.c.state |= CURSOR_WRAPNEXT;
2620 }
2621 }
2622
2623 int
2624 tresize(int col, int row) {
2625 int i;
2626 int minrow = MIN(row, term.row);
2627 int mincol = MIN(col, term.col);
2628 int slide = term.c.y - row + 1;
2629 bool *bp;
2630 Line *orig;
2631
2632 if(col < 1 || row < 1)
2633 return 0;
2634
2635 /* free unneeded rows */
2636 i = 0;
2637 if(slide > 0) {
2638 /*
2639 * slide screen to keep cursor where we expect it -
2640 * tscrollup would work here, but we can optimize to
2641 * memmove because we're freeing the earlier lines
2642 */
2643 for(/* i = 0 */; i < slide; i++) {
2644 free(term.line[i]);
2645 free(term.alt[i]);
2646 }
2647 memmove(term.line, term.line + slide, row * sizeof(Line));
2648 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2649 }
2650 for(i += row; i < term.row; i++) {
2651 free(term.line[i]);
2652 free(term.alt[i]);
2653 }
2654
2655 /* resize to new height */
2656 term.line = xrealloc(term.line, row * sizeof(Line));
2657 term.alt = xrealloc(term.alt, row * sizeof(Line));
2658 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2659 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2660
2661 /* resize each row to new width, zero-pad if needed */
2662 for(i = 0; i < minrow; i++) {
2663 term.dirty[i] = 1;
2664 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2665 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2666 }
2667
2668 /* allocate any new rows */
2669 for(/* i == minrow */; i < row; i++) {
2670 term.dirty[i] = 1;
2671 term.line[i] = xmalloc(col * sizeof(Glyph));
2672 term.alt[i] = xmalloc(col * sizeof(Glyph));
2673 }
2674 if(col > term.col) {
2675 bp = term.tabs + term.col;
2676
2677 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2678 while(--bp > term.tabs && !*bp)
2679 /* nothing */ ;
2680 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2681 *bp = 1;
2682 }
2683 /* update terminal size */
2684 term.col = col;
2685 term.row = row;
2686 /* reset scrolling region */
2687 tsetscroll(0, row-1);
2688 /* make use of the LIMIT in tmoveto */
2689 tmoveto(term.c.x, term.c.y);
2690 /* Clearing both screens */
2691 orig = term.line;
2692 do {
2693 if(mincol < col && 0 < minrow) {
2694 tclearregion(mincol, 0, col - 1, minrow - 1);
2695 }
2696 if(0 < col && minrow < row) {
2697 tclearregion(0, minrow, col - 1, row - 1);
2698 }
2699 tswapscreen();
2700 } while(orig != term.line);
2701
2702 return (slide > 0);
2703 }
2704
2705 void
2706 xresize(int col, int row) {
2707 xw.tw = MAX(1, col * xw.cw);
2708 xw.th = MAX(1, row * xw.ch);
2709
2710 XFreePixmap(xw.dpy, xw.buf);
2711 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2712 DefaultDepth(xw.dpy, xw.scr));
2713 XftDrawChange(xw.draw, xw.buf);
2714 xclear(0, 0, xw.w, xw.h);
2715 }
2716
2717 static inline ushort
2718 sixd_to_16bit(int x) {
2719 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2720 }
2721
2722 void
2723 xloadcols(void) {
2724 int i, r, g, b;
2725 XRenderColor color = { .alpha = 0xffff };
2726 static bool loaded;
2727 Colour *cp;
2728
2729 if(loaded) {
2730 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2731 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2732 }
2733
2734 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2735 for(i = 0; i < LEN(colorname); i++) {
2736 if(!colorname[i])
2737 continue;
2738 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2739 die("Could not allocate color '%s'\n", colorname[i]);
2740 }
2741 }
2742
2743 /* load colors [16-255] ; same colors as xterm */
2744 for(i = 16, r = 0; r < 6; r++) {
2745 for(g = 0; g < 6; g++) {
2746 for(b = 0; b < 6; b++) {
2747 color.red = sixd_to_16bit(r);
2748 color.green = sixd_to_16bit(g);
2749 color.blue = sixd_to_16bit(b);
2750 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2751 die("Could not allocate color %d\n", i);
2752 }
2753 i++;
2754 }
2755 }
2756 }
2757
2758 for(r = 0; r < 24; r++, i++) {
2759 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2760 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2761 &dc.col[i])) {
2762 die("Could not allocate color %d\n", i);
2763 }
2764 }
2765 loaded = true;
2766 }
2767
2768 int
2769 xsetcolorname(int x, const char *name) {
2770 XRenderColor color = { .alpha = 0xffff };
2771 Colour colour;
2772 if (x < 0 || x > LEN(colorname))
2773 return -1;
2774 if(!name) {
2775 if(16 <= x && x < 16 + 216) {
2776 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2777 color.red = sixd_to_16bit(r);
2778 color.green = sixd_to_16bit(g);
2779 color.blue = sixd_to_16bit(b);
2780 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2781 return 0; /* something went wrong */
2782 dc.col[x] = colour;
2783 return 1;
2784 } else if (16 + 216 <= x && x < 256) {
2785 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2786 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2787 return 0; /* something went wrong */
2788 dc.col[x] = colour;
2789 return 1;
2790 } else {
2791 name = colorname[x];
2792 }
2793 }
2794 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2795 return 0;
2796 dc.col[x] = colour;
2797 return 1;
2798 }
2799
2800 void
2801 xtermclear(int col1, int row1, int col2, int row2) {
2802 XftDrawRect(xw.draw,
2803 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2804 borderpx + col1 * xw.cw,
2805 borderpx + row1 * xw.ch,
2806 (col2-col1+1) * xw.cw,
2807 (row2-row1+1) * xw.ch);
2808 }
2809
2810 /*
2811 * Absolute coordinates.
2812 */
2813 void
2814 xclear(int x1, int y1, int x2, int y2) {
2815 XftDrawRect(xw.draw,
2816 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2817 x1, y1, x2-x1, y2-y1);
2818 }
2819
2820 void
2821 xhints(void) {
2822 XClassHint class = {opt_class ? opt_class : termname, termname};
2823 XWMHints wm = {.flags = InputHint, .input = 1};
2824 XSizeHints *sizeh = NULL;
2825
2826 sizeh = XAllocSizeHints();
2827 if(xw.isfixed == False) {
2828 sizeh->flags = PSize | PResizeInc | PBaseSize;
2829 sizeh->height = xw.h;
2830 sizeh->width = xw.w;
2831 sizeh->height_inc = xw.ch;
2832 sizeh->width_inc = xw.cw;
2833 sizeh->base_height = 2 * borderpx;
2834 sizeh->base_width = 2 * borderpx;
2835 } else {
2836 sizeh->flags = PMaxSize | PMinSize;
2837 sizeh->min_width = sizeh->max_width = xw.fw;
2838 sizeh->min_height = sizeh->max_height = xw.fh;
2839 }
2840
2841 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2842 XFree(sizeh);
2843 }
2844
2845 int
2846 xloadfont(Font *f, FcPattern *pattern) {
2847 FcPattern *match;
2848 FcResult result;
2849
2850 match = FcFontMatch(NULL, pattern, &result);
2851 if(!match)
2852 return 1;
2853
2854 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2855 FcPatternDestroy(match);
2856 return 1;
2857 }
2858
2859 f->set = NULL;
2860 f->pattern = FcPatternDuplicate(pattern);
2861
2862 f->ascent = f->match->ascent;
2863 f->descent = f->match->descent;
2864 f->lbearing = 0;
2865 f->rbearing = f->match->max_advance_width;
2866
2867 f->height = f->ascent + f->descent;
2868 f->width = f->lbearing + f->rbearing;
2869
2870 return 0;
2871 }
2872
2873 void
2874 xloadfonts(char *fontstr, double fontsize) {
2875 FcPattern *pattern;
2876 FcResult r_sz, r_psz;
2877 double fontval;
2878
2879 if(fontstr[0] == '-') {
2880 pattern = XftXlfdParse(fontstr, False, False);
2881 } else {
2882 pattern = FcNameParse((FcChar8 *)fontstr);
2883 }
2884
2885 if(!pattern)
2886 die("st: can't open font %s\n", fontstr);
2887
2888 if(fontsize > 0) {
2889 FcPatternDel(pattern, FC_PIXEL_SIZE);
2890 FcPatternDel(pattern, FC_SIZE);
2891 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2892 usedfontsize = fontsize;
2893 } else {
2894 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2895 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2896 if(r_psz == FcResultMatch) {
2897 usedfontsize = fontval;
2898 } else if(r_sz == FcResultMatch) {
2899 usedfontsize = -1;
2900 } else {
2901 /*
2902 * Default font size is 12, if none given. This is to
2903 * have a known usedfontsize value.
2904 */
2905 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2906 usedfontsize = 12;
2907 }
2908 }
2909
2910 FcConfigSubstitute(0, pattern, FcMatchPattern);
2911 FcDefaultSubstitute(pattern);
2912
2913 if(xloadfont(&dc.font, pattern))
2914 die("st: can't open font %s\n", fontstr);
2915
2916 if(usedfontsize < 0) {
2917 FcPatternGetDouble(dc.font.match->pattern,
2918 FC_PIXEL_SIZE, 0, &fontval);
2919 usedfontsize = fontval;
2920 }
2921
2922 /* Setting character width and height. */
2923 xw.cw = CEIL(dc.font.width * cwscale);
2924 xw.ch = CEIL(dc.font.height * chscale);
2925
2926 FcPatternDel(pattern, FC_SLANT);
2927 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2928 if(xloadfont(&dc.ifont, pattern))
2929 die("st: can't open font %s\n", fontstr);
2930
2931 FcPatternDel(pattern, FC_WEIGHT);
2932 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2933 if(xloadfont(&dc.ibfont, pattern))
2934 die("st: can't open font %s\n", fontstr);
2935
2936 FcPatternDel(pattern, FC_SLANT);
2937 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2938 if(xloadfont(&dc.bfont, pattern))
2939 die("st: can't open font %s\n", fontstr);
2940
2941 FcPatternDestroy(pattern);
2942 }
2943
2944 int
2945 xloadfontset(Font *f) {
2946 FcResult result;
2947
2948 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2949 return 1;
2950 return 0;
2951 }
2952
2953 void
2954 xunloadfont(Font *f) {
2955 XftFontClose(xw.dpy, f->match);
2956 FcPatternDestroy(f->pattern);
2957 if(f->set)
2958 FcFontSetDestroy(f->set);
2959 }
2960
2961 void
2962 xunloadfonts(void) {
2963 int i;
2964
2965 /* Free the loaded fonts in the font cache. */
2966 for(i = 0; i < frclen; i++) {
2967 XftFontClose(xw.dpy, frc[i].font);
2968 }
2969 frclen = 0;
2970
2971 xunloadfont(&dc.font);
2972 xunloadfont(&dc.bfont);
2973 xunloadfont(&dc.ifont);
2974 xunloadfont(&dc.ibfont);
2975 }
2976
2977 void
2978 xzoom(const Arg *arg) {
2979 xunloadfonts();
2980 xloadfonts(usedfont, usedfontsize + arg->i);
2981 cresize(0, 0);
2982 redraw(0);
2983 }
2984
2985 void
2986 xinit(void) {
2987 XGCValues gcvalues;
2988 Cursor cursor;
2989 Window parent;
2990 int sw, sh;
2991 pid_t thispid = getpid();
2992
2993 if(!(xw.dpy = XOpenDisplay(NULL)))
2994 die("Can't open display\n");
2995 xw.scr = XDefaultScreen(xw.dpy);
2996 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2997
2998 /* font */
2999 if(!FcInit())
3000 die("Could not init fontconfig.\n");
3001
3002 usedfont = (opt_font == NULL)? font : opt_font;
3003 xloadfonts(usedfont, 0);
3004
3005 /* colors */
3006 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3007 xloadcols();
3008
3009 /* adjust fixed window geometry */
3010 if(xw.isfixed) {
3011 sw = DisplayWidth(xw.dpy, xw.scr);
3012 sh = DisplayHeight(xw.dpy, xw.scr);
3013 if(xw.fx < 0)
3014 xw.fx = sw + xw.fx - xw.fw - 1;
3015 if(xw.fy < 0)
3016 xw.fy = sh + xw.fy - xw.fh - 1;
3017
3018 xw.h = xw.fh;
3019 xw.w = xw.fw;
3020 } else {
3021 /* window - default size */
3022 xw.h = 2 * borderpx + term.row * xw.ch;
3023 xw.w = 2 * borderpx + term.col * xw.cw;
3024 xw.fx = 0;
3025 xw.fy = 0;
3026 }
3027
3028 /* Events */
3029 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3030 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3031 xw.attrs.bit_gravity = NorthWestGravity;
3032 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3033 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3034 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3035 xw.attrs.colormap = xw.cmap;
3036
3037 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3038 XRootWindow(xw.dpy, xw.scr);
3039 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
3040 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3041 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3042 | CWEventMask | CWColormap, &xw.attrs);
3043
3044 memset(&gcvalues, 0, sizeof(gcvalues));
3045 gcvalues.graphics_exposures = False;
3046 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3047 &gcvalues);
3048 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3049 DefaultDepth(xw.dpy, xw.scr));
3050 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3051 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3052
3053 /* Xft rendering context */
3054 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3055
3056 /* input methods */
3057 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3058 XSetLocaleModifiers("@im=local");
3059 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3060 XSetLocaleModifiers("@im=");
3061 if((xw.xim = XOpenIM(xw.dpy,
3062 NULL, NULL, NULL)) == NULL) {
3063 die("XOpenIM failed. Could not open input"
3064 " device.\n");
3065 }
3066 }
3067 }
3068 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3069 | XIMStatusNothing, XNClientWindow, xw.win,
3070 XNFocusWindow, xw.win, NULL);
3071 if(xw.xic == NULL)
3072 die("XCreateIC failed. Could not obtain input method.\n");
3073
3074 /* white cursor, black outline */
3075 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3076 XDefineCursor(xw.dpy, xw.win, cursor);
3077 XRecolorCursor(xw.dpy, cursor,
3078 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3079 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3080
3081 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3082 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3083 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3084 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3085
3086 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3087 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3088 PropModeReplace, (unsigned char *)&thispid, 1);
3089
3090 xresettitle();
3091 XMapWindow(xw.dpy, xw.win);
3092 xhints();
3093 XSync(xw.dpy, 0);
3094 }
3095
3096 void
3097 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3098 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3099 width = charlen * xw.cw, xp, i;
3100 int frcflags;
3101 int u8fl, u8fblen, u8cblen, doesexist;
3102 char *u8c, *u8fs;
3103 long u8char;
3104 Font *font = &dc.font;
3105 FcResult fcres;
3106 FcPattern *fcpattern, *fontpattern;
3107 FcFontSet *fcsets[] = { NULL };
3108 FcCharSet *fccharset;
3109 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3110 XRenderColor colfg, colbg;
3111 Rectangle r;
3112 int oneatatime;
3113
3114 frcflags = FRC_NORMAL;
3115
3116 if(base.mode & ATTR_ITALIC) {
3117 if(base.fg == defaultfg)
3118 base.fg = defaultitalic;
3119 font = &dc.ifont;
3120 frcflags = FRC_ITALIC;
3121 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3122 if(base.fg == defaultfg)
3123 base.fg = defaultitalic;
3124 font = &dc.ibfont;
3125 frcflags = FRC_ITALICBOLD;
3126 } else if(base.mode & ATTR_UNDERLINE) {
3127 if(base.fg == defaultfg)
3128 base.fg = defaultunderline;
3129 }
3130 if(IS_TRUECOL(base.fg)) {
3131 colfg.alpha = 0xffff;
3132 colfg.red = TRUERED(base.fg);
3133 colfg.green = TRUEGREEN(base.fg);
3134 colfg.blue = TRUEBLUE(base.fg);
3135 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3136 fg = &truefg;
3137 } else {
3138 fg = &dc.col[base.fg];
3139 }
3140
3141 if(IS_TRUECOL(base.bg)) {
3142 colbg.alpha = 0xffff;
3143 colbg.green = TRUEGREEN(base.bg);
3144 colbg.red = TRUERED(base.bg);
3145 colbg.blue = TRUEBLUE(base.bg);
3146 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3147 bg = &truebg;
3148 } else {
3149 bg = &dc.col[base.bg];
3150 }
3151
3152
3153
3154 if(base.mode & ATTR_BOLD) {
3155 if(BETWEEN(base.fg, 0, 7)) {
3156 /* basic system colors */
3157 fg = &dc.col[base.fg + 8];
3158 } else if(BETWEEN(base.fg, 16, 195)) {
3159 /* 256 colors */
3160 fg = &dc.col[base.fg + 36];
3161 } else if(BETWEEN(base.fg, 232, 251)) {
3162 /* greyscale */
3163 fg = &dc.col[base.fg + 4];
3164 }
3165 /*
3166 * Those ranges will not be brightened:
3167 * 8 - 15 – bright system colors
3168 * 196 - 231 – highest 256 color cube
3169 * 252 - 255 – brightest colors in greyscale
3170 */
3171 font = &dc.bfont;
3172 frcflags = FRC_BOLD;
3173 }
3174
3175 if(IS_SET(MODE_REVERSE)) {
3176 if(fg == &dc.col[defaultfg]) {
3177 fg = &dc.col[defaultbg];
3178 } else {
3179 colfg.red = ~fg->color.red;
3180 colfg.green = ~fg->color.green;
3181 colfg.blue = ~fg->color.blue;
3182 colfg.alpha = fg->color.alpha;
3183 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3184 fg = &revfg;
3185 }
3186
3187 if(bg == &dc.col[defaultbg]) {
3188 bg = &dc.col[defaultfg];
3189 } else {
3190 colbg.red = ~bg->color.red;
3191 colbg.green = ~bg->color.green;
3192 colbg.blue = ~bg->color.blue;
3193 colbg.alpha = bg->color.alpha;
3194 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
3195 bg = &revbg;
3196 }
3197 }
3198
3199 if(base.mode & ATTR_REVERSE) {
3200 temp = fg;
3201 fg = bg;
3202 bg = temp;
3203 }
3204
3205 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3206 fg = bg;
3207
3208 /* Intelligent cleaning up of the borders. */
3209 if(x == 0) {
3210 xclear(0, (y == 0)? 0 : winy, borderpx,
3211 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3212 }
3213 if(x + charlen >= term.col) {
3214 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3215 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3216 }
3217 if(y == 0)
3218 xclear(winx, 0, winx + width, borderpx);
3219 if(y == term.row-1)
3220 xclear(winx, winy + xw.ch, winx + width, xw.h);
3221
3222 /* Clean up the region we want to draw to. */
3223 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3224
3225 /* Set the clip region because Xft is sometimes dirty. */
3226 r.x = 0;
3227 r.y = 0;
3228 r.height = xw.ch;
3229 r.width = width;
3230 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3231
3232 for(xp = winx; bytelen > 0;) {
3233 /*
3234 * Search for the range in the to be printed string of glyphs
3235 * that are in the main font. Then print that range. If
3236 * some glyph is found that is not in the font, do the
3237 * fallback dance.
3238 */
3239 u8fs = s;
3240 u8fblen = 0;
3241 u8fl = 0;
3242 oneatatime = font->width != xw.cw;
3243 for(;;) {
3244 u8c = s;
3245 u8cblen = utf8decode(s, &u8char);
3246 s += u8cblen;
3247 bytelen -= u8cblen;
3248
3249 doesexist = XftCharExists(xw.dpy, font->match, u8char);
3250 if(oneatatime || !doesexist || bytelen <= 0) {
3251 if(oneatatime || bytelen <= 0) {
3252 if(doesexist) {
3253 u8fl++;
3254 u8fblen += u8cblen;
3255 }
3256 }
3257
3258 if(u8fl > 0) {
3259 XftDrawStringUtf8(xw.draw, fg,
3260 font->match, xp,
3261 winy + font->ascent,
3262 (FcChar8 *)u8fs,
3263 u8fblen);
3264 xp += xw.cw * u8fl;
3265
3266 }
3267 break;
3268 }
3269
3270 u8fl++;
3271 u8fblen += u8cblen;
3272 }
3273 if(doesexist) {
3274 if (oneatatime)
3275 continue;
3276 break;
3277 }
3278
3279 /* Search the font cache. */
3280 for(i = 0; i < frclen; i++) {
3281 if(XftCharExists(xw.dpy, frc[i].font, u8char)
3282 && frc[i].flags == frcflags) {
3283 break;
3284 }
3285 }
3286
3287 /* Nothing was found. */
3288 if(i >= frclen) {
3289 if(!font->set)
3290 xloadfontset(font);
3291 fcsets[0] = font->set;
3292
3293 /*
3294 * Nothing was found in the cache. Now use
3295 * some dozen of Fontconfig calls to get the
3296 * font for one single character.
3297 */
3298 fcpattern = FcPatternDuplicate(font->pattern);
3299 fccharset = FcCharSetCreate();
3300
3301 FcCharSetAddChar(fccharset, u8char);
3302 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3303 fccharset);
3304 FcPatternAddBool(fcpattern, FC_SCALABLE,
3305 FcTrue);
3306
3307 FcConfigSubstitute(0, fcpattern,
3308 FcMatchPattern);
3309 FcDefaultSubstitute(fcpattern);
3310
3311 fontpattern = FcFontSetMatch(0, fcsets,
3312 FcTrue, fcpattern, &fcres);
3313
3314 /*
3315 * Overwrite or create the new cache entry.
3316 */
3317 if(frclen >= LEN(frc)) {
3318 frclen = LEN(frc) - 1;
3319 XftFontClose(xw.dpy, frc[frclen].font);
3320 }
3321
3322 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3323 fontpattern);
3324 frc[frclen].flags = frcflags;
3325
3326 i = frclen;
3327 frclen++;
3328
3329 FcPatternDestroy(fcpattern);
3330 FcCharSetDestroy(fccharset);
3331 }
3332
3333 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3334 xp, winy + frc[i].font->ascent,
3335 (FcChar8 *)u8c, u8cblen);
3336
3337 xp += xw.cw * wcwidth(u8char);
3338 }
3339
3340 /*
3341 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3342 winy + font->ascent, (FcChar8 *)s, bytelen);
3343 */
3344
3345 if(base.mode & ATTR_UNDERLINE) {
3346 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3347 width, 1);
3348 }
3349
3350 /* Reset clip to none. */
3351 XftDrawSetClip(xw.draw, 0);
3352 }
3353
3354 void
3355 xdrawcursor(void) {
3356 static int oldx = 0, oldy = 0;
3357 int sl, width, curx;
3358 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3359
3360 LIMIT(oldx, 0, term.col-1);
3361 LIMIT(oldy, 0, term.row-1);
3362
3363 curx = term.c.x;
3364
3365 /* adjust position if in dummy */
3366 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3367 oldx--;
3368 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3369 curx--;
3370
3371 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3372
3373 /* remove the old cursor */
3374 sl = utf8size(term.line[oldy][oldx].c);
3375 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3376 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3377 oldy, width, sl);
3378
3379 /* draw the new one */
3380 if(!(IS_SET(MODE_HIDE))) {
3381 if(xw.state & WIN_FOCUSED) {
3382 if(IS_SET(MODE_REVERSE)) {
3383 g.mode |= ATTR_REVERSE;
3384 g.fg = defaultcs;
3385 g.bg = defaultfg;
3386 }
3387
3388 sl = utf8size(g.c);
3389 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3390 ? 2 : 1;
3391 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3392 } else {
3393 XftDrawRect(xw.draw, &dc.col[defaultcs],
3394 borderpx + curx * xw.cw,
3395 borderpx + term.c.y * xw.ch,
3396 xw.cw - 1, 1);
3397 XftDrawRect(xw.draw, &dc.col[defaultcs],
3398 borderpx + curx * xw.cw,
3399 borderpx + term.c.y * xw.ch,
3400 1, xw.ch - 1);
3401 XftDrawRect(xw.draw, &dc.col[defaultcs],
3402 borderpx + (curx + 1) * xw.cw - 1,
3403 borderpx + term.c.y * xw.ch,
3404 1, xw.ch - 1);
3405 XftDrawRect(xw.draw, &dc.col[defaultcs],
3406 borderpx + curx * xw.cw,
3407 borderpx + (term.c.y + 1) * xw.ch - 1,
3408 xw.cw, 1);
3409 }
3410 oldx = curx, oldy = term.c.y;
3411 }
3412 }
3413
3414
3415 void
3416 xsettitle(char *p) {
3417 XTextProperty prop;
3418
3419 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3420 &prop);
3421 XSetWMName(xw.dpy, xw.win, &prop);
3422 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3423 XFree(prop.value);
3424 }
3425
3426 void
3427 xresettitle(void) {
3428 xsettitle(opt_title ? opt_title : "st");
3429 }
3430
3431 void
3432 redraw(int timeout) {
3433 struct timespec tv = {0, timeout * 1000};
3434
3435 tfulldirt();
3436 draw();
3437
3438 if(timeout > 0) {
3439 nanosleep(&tv, NULL);
3440 XSync(xw.dpy, False); /* necessary for a good tput flash */
3441 }
3442 }
3443
3444 void
3445 draw(void) {
3446 drawregion(0, 0, term.col, term.row);
3447 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3448 xw.h, 0, 0);
3449 XSetForeground(xw.dpy, dc.gc,
3450 dc.col[IS_SET(MODE_REVERSE)?
3451 defaultfg : defaultbg].pixel);
3452 }
3453
3454 void
3455 drawregion(int x1, int y1, int x2, int y2) {
3456 int ic, ib, x, y, ox, sl;
3457 Glyph base, new;
3458 char buf[DRAW_BUF_SIZ];
3459 bool ena_sel = sel.ob.x != -1;
3460 long u8char;
3461
3462 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3463 ena_sel = 0;
3464
3465 if(!(xw.state & WIN_VISIBLE))
3466 return;
3467
3468 for(y = y1; y < y2; y++) {
3469 if(!term.dirty[y])
3470 continue;
3471
3472 xtermclear(0, y, term.col, y);
3473 term.dirty[y] = 0;
3474 base = term.line[y][0];
3475 ic = ib = ox = 0;
3476 for(x = x1; x < x2; x++) {
3477 new = term.line[y][x];
3478 if(new.mode == ATTR_WDUMMY)
3479 continue;
3480 if(ena_sel && selected(x, y))
3481 new.mode ^= ATTR_REVERSE;
3482 if(ib > 0 && (ATTRCMP(base, new)
3483 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3484 xdraws(buf, base, ox, y, ic, ib);
3485 ic = ib = 0;
3486 }
3487 if(ib == 0) {
3488 ox = x;
3489 base = new;
3490 }
3491
3492 sl = utf8decode(new.c, &u8char);
3493 memcpy(buf+ib, new.c, sl);
3494 ib += sl;
3495 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3496 }
3497 if(ib > 0)
3498 xdraws(buf, base, ox, y, ic, ib);
3499 }
3500 xdrawcursor();
3501 }
3502
3503 void
3504 expose(XEvent *ev) {
3505 XExposeEvent *e = &ev->xexpose;
3506
3507 if(xw.state & WIN_REDRAW) {
3508 if(!e->count)
3509 xw.state &= ~WIN_REDRAW;
3510 }
3511 redraw(0);
3512 }
3513
3514 void
3515 visibility(XEvent *ev) {
3516 XVisibilityEvent *e = &ev->xvisibility;
3517
3518 if(e->state == VisibilityFullyObscured) {
3519 xw.state &= ~WIN_VISIBLE;
3520 } else if(!(xw.state & WIN_VISIBLE)) {
3521 /* need a full redraw for next Expose, not just a buf copy */
3522 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3523 }
3524 }
3525
3526 void
3527 unmap(XEvent *ev) {
3528 xw.state &= ~WIN_VISIBLE;
3529 }
3530
3531 void
3532 xsetpointermotion(int set) {
3533 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3534 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3535 }
3536
3537 void
3538 xseturgency(int add) {
3539 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3540
3541 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3542 XSetWMHints(xw.dpy, xw.win, h);
3543 XFree(h);
3544 }
3545
3546 void
3547 focus(XEvent *ev) {
3548 XFocusChangeEvent *e = &ev->xfocus;
3549
3550 if(e->mode == NotifyGrab)
3551 return;
3552
3553 if(ev->type == FocusIn) {
3554 XSetICFocus(xw.xic);
3555 xw.state |= WIN_FOCUSED;
3556 xseturgency(0);
3557 if(IS_SET(MODE_FOCUS))
3558 ttywrite("\033[I", 3);
3559 } else {
3560 XUnsetICFocus(xw.xic);
3561 xw.state &= ~WIN_FOCUSED;
3562 if(IS_SET(MODE_FOCUS))
3563 ttywrite("\033[O", 3);
3564 }
3565 }
3566
3567 static inline bool
3568 match(uint mask, uint state) {
3569 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3570 }
3571
3572 void
3573 numlock(const Arg *dummy) {
3574 term.numlock ^= 1;
3575 }
3576
3577 char*
3578 kmap(KeySym k, uint state) {
3579 Key *kp;
3580 int i;
3581
3582 /* Check for mapped keys out of X11 function keys. */
3583 for(i = 0; i < LEN(mappedkeys); i++) {
3584 if(mappedkeys[i] == k)
3585 break;
3586 }
3587 if(i == LEN(mappedkeys)) {
3588 if((k & 0xFFFF) < 0xFD00)
3589 return NULL;
3590 }
3591
3592 for(kp = key; kp < key + LEN(key); kp++) {
3593 if(kp->k != k)
3594 continue;
3595
3596 if(!match(kp->mask, state))
3597 continue;
3598
3599 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3600 continue;
3601 if(term.numlock && kp->appkey == 2)
3602 continue;
3603
3604 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3605 continue;
3606
3607 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3608 continue;
3609
3610 return kp->s;
3611 }
3612
3613 return NULL;
3614 }
3615
3616 void
3617 kpress(XEvent *ev) {
3618 XKeyEvent *e = &ev->xkey;
3619 KeySym ksym;
3620 char buf[32], *customkey;
3621 int len;
3622 long c;
3623 Status status;
3624 Shortcut *bp;
3625
3626 if(IS_SET(MODE_KBDLOCK))
3627 return;
3628
3629 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3630 /* 1. shortcuts */
3631 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3632 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3633 bp->func(&(bp->arg));
3634 return;
3635 }
3636 }
3637
3638 /* 2. custom keys from config.h */
3639 if((customkey = kmap(ksym, e->state))) {
3640 ttysend(customkey, strlen(customkey));
3641 return;
3642 }
3643
3644 /* 3. composed string from input method */
3645 if(len == 0)
3646 return;
3647 if(len == 1 && e->state & Mod1Mask) {
3648 if(IS_SET(MODE_8BIT)) {
3649 if(*buf < 0177) {
3650 c = *buf | 0x80;
3651 len = utf8encode(&c, buf);
3652 }
3653 } else {
3654 buf[1] = buf[0];
3655 buf[0] = '\033';
3656 len = 2;
3657 }
3658 }
3659 ttysend(buf, len);
3660 }
3661
3662
3663 void
3664 cmessage(XEvent *e) {
3665 /*
3666 * See xembed specs
3667 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3668 */
3669 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3670 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3671 xw.state |= WIN_FOCUSED;
3672 xseturgency(0);
3673 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3674 xw.state &= ~WIN_FOCUSED;
3675 }
3676 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3677 /* Send SIGHUP to shell */
3678 kill(pid, SIGHUP);
3679 exit(EXIT_SUCCESS);
3680 }
3681 }
3682
3683 void
3684 cresize(int width, int height) {
3685 int col, row;
3686
3687 if(width != 0)
3688 xw.w = width;
3689 if(height != 0)
3690 xw.h = height;
3691
3692 col = (xw.w - 2 * borderpx) / xw.cw;
3693 row = (xw.h - 2 * borderpx) / xw.ch;
3694
3695 tresize(col, row);
3696 xresize(col, row);
3697 ttyresize();
3698 }
3699
3700 void
3701 resize(XEvent *e) {
3702 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3703 return;
3704
3705 cresize(e->xconfigure.width, e->xconfigure.height);
3706 }
3707
3708 void
3709 run(void) {
3710 XEvent ev;
3711 int w = xw.w, h = xw.h;
3712 fd_set rfd;
3713 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3714 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3715
3716 /* Waiting for window mapping */
3717 while(1) {
3718 XNextEvent(xw.dpy, &ev);
3719 if(ev.type == ConfigureNotify) {
3720 w = ev.xconfigure.width;
3721 h = ev.xconfigure.height;
3722 } else if(ev.type == MapNotify) {
3723 break;
3724 }
3725 }
3726
3727 ttynew();
3728 if(!xw.isfixed)
3729 cresize(w, h);
3730 else
3731 cresize(xw.fw, xw.fh);
3732
3733 gettimeofday(&lastblink, NULL);
3734 gettimeofday(&last, NULL);
3735
3736 for(xev = actionfps;;) {
3737 long deltatime;
3738
3739 FD_ZERO(&rfd);
3740 FD_SET(cmdfd, &rfd);
3741 FD_SET(xfd, &rfd);
3742
3743 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3744 if(errno == EINTR)
3745 continue;
3746 die("select failed: %s\n", SERRNO);
3747 }
3748 if(FD_ISSET(cmdfd, &rfd)) {
3749 ttyread();
3750 if(blinktimeout) {
3751 blinkset = tattrset(ATTR_BLINK);
3752 if(!blinkset)
3753 MODBIT(term.mode, 0, MODE_BLINK);
3754 }
3755 }
3756
3757 if(FD_ISSET(xfd, &rfd))
3758 xev = actionfps;
3759
3760 gettimeofday(&now, NULL);
3761 drawtimeout.tv_sec = 0;
3762 drawtimeout.tv_usec = (1000/xfps) * 1000;
3763 tv = &drawtimeout;
3764
3765 dodraw = 0;
3766 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3767 tsetdirtattr(ATTR_BLINK);
3768 term.mode ^= MODE_BLINK;
3769 gettimeofday(&lastblink, NULL);
3770 dodraw = 1;
3771 }
3772 deltatime = TIMEDIFF(now, last);
3773 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3774 || deltatime < 0) {
3775 dodraw = 1;
3776 last = now;
3777 }
3778
3779 if(dodraw) {
3780 while(XPending(xw.dpy)) {
3781 XNextEvent(xw.dpy, &ev);
3782 if(XFilterEvent(&ev, None))
3783 continue;
3784 if(handler[ev.type])
3785 (handler[ev.type])(&ev);
3786 }
3787
3788 draw();
3789 XFlush(xw.dpy);
3790
3791 if(xev && !FD_ISSET(xfd, &rfd))
3792 xev--;
3793 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3794 if(blinkset) {
3795 if(TIMEDIFF(now, lastblink) \
3796 > blinktimeout) {
3797 drawtimeout.tv_usec = 1;
3798 } else {
3799 drawtimeout.tv_usec = (1000 * \
3800 (blinktimeout - \
3801 TIMEDIFF(now,
3802 lastblink)));
3803 }
3804 } else {
3805 tv = NULL;
3806 }
3807 }
3808 }
3809 }
3810 }
3811
3812 void
3813 usage(void) {
3814 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3815 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3816 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3817 }
3818
3819 int
3820 main(int argc, char *argv[]) {
3821 int bitm, xr, yr;
3822 uint wr, hr;
3823 char *titles;
3824
3825 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3826 xw.isfixed = False;
3827
3828 ARGBEGIN {
3829 case 'a':
3830 allowaltscreen = false;
3831 break;
3832 case 'c':
3833 opt_class = EARGF(usage());
3834 break;
3835 case 'e':
3836 /* eat all remaining arguments */
3837 if(argc > 1) {
3838 opt_cmd = &argv[1];
3839 if(argv[1] != NULL && opt_title == NULL) {
3840 titles = xstrdup(argv[1]);
3841 opt_title = basename(titles);
3842 }
3843 }
3844 goto run;
3845 case 'f':
3846 opt_font = EARGF(usage());
3847 break;
3848 case 'g':
3849 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3850 if(bitm & XValue)
3851 xw.fx = xr;
3852 if(bitm & YValue)
3853 xw.fy = yr;
3854 if(bitm & WidthValue)
3855 xw.fw = (int)wr;
3856 if(bitm & HeightValue)
3857 xw.fh = (int)hr;
3858 if(bitm & XNegative && xw.fx == 0)
3859 xw.fx = -1;
3860 if(bitm & YNegative && xw.fy == 0)
3861 xw.fy = -1;
3862
3863 if(xw.fh != 0 && xw.fw != 0)
3864 xw.isfixed = True;
3865 break;
3866 case 'o':
3867 opt_io = EARGF(usage());
3868 break;
3869 case 't':
3870 opt_title = EARGF(usage());
3871 break;
3872 case 'w':
3873 opt_embed = EARGF(usage());
3874 break;
3875 case 'v':
3876 default:
3877 usage();
3878 } ARGEND;
3879
3880 run:
3881 setlocale(LC_CTYPE, "");
3882 XSetLocaleModifiers("");
3883 tnew(80, 24);
3884 xinit();
3885 selinit();
3886 run();
3887
3888 return 0;
3889 }
3890