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[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a)[0])
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
74 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
75 #define IS_SET(flag) ((term.mode & (flag)) != 0)
76 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
77 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
78 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
79
80 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
81 #define IS_TRUECOL(x) (1 << 24 & (x))
82 #define TRUERED(x) (((x) & 0xff0000) >> 8)
83 #define TRUEGREEN(x) (((x) & 0xff00))
84 #define TRUEBLUE(x) (((x) & 0xff) << 8)
85
86
87 #define VT102ID "\033[?6c"
88
89 enum glyph_attribute {
90 ATTR_NULL = 0,
91 ATTR_REVERSE = 1,
92 ATTR_UNDERLINE = 2,
93 ATTR_BOLD = 4,
94 ATTR_GFX = 8,
95 ATTR_ITALIC = 16,
96 ATTR_BLINK = 32,
97 ATTR_WRAP = 64,
98 ATTR_WIDE = 128,
99 ATTR_WDUMMY = 256,
100 };
101
102 enum cursor_movement {
103 CURSOR_SAVE,
104 CURSOR_LOAD
105 };
106
107 enum cursor_state {
108 CURSOR_DEFAULT = 0,
109 CURSOR_WRAPNEXT = 1,
110 CURSOR_ORIGIN = 2
111 };
112
113 enum term_mode {
114 MODE_WRAP = 1,
115 MODE_INSERT = 2,
116 MODE_APPKEYPAD = 4,
117 MODE_ALTSCREEN = 8,
118 MODE_CRLF = 16,
119 MODE_MOUSEBTN = 32,
120 MODE_MOUSEMOTION = 64,
121 MODE_REVERSE = 128,
122 MODE_KBDLOCK = 256,
123 MODE_HIDE = 512,
124 MODE_ECHO = 1024,
125 MODE_APPCURSOR = 2048,
126 MODE_MOUSESGR = 4096,
127 MODE_8BIT = 8192,
128 MODE_BLINK = 16384,
129 MODE_FBLINK = 32768,
130 MODE_FOCUS = 65536,
131 MODE_MOUSEX10 = 131072,
132 MODE_MOUSEMANY = 262144,
133 MODE_BRCKTPASTE = 524288,
134 MODE_PRINT = 1048576,
135 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
136 |MODE_MOUSEMANY,
137 };
138
139 enum charset {
140 CS_GRAPHIC0,
141 CS_GRAPHIC1,
142 CS_UK,
143 CS_USA,
144 CS_MULTI,
145 CS_GER,
146 CS_FIN
147 };
148
149 enum escape_state {
150 ESC_START = 1,
151 ESC_CSI = 2,
152 ESC_STR = 4, /* DSC, OSC, PM, APC */
153 ESC_ALTCHARSET = 8,
154 ESC_STR_END = 16, /* a final string was encountered */
155 ESC_TEST = 32, /* Enter in test mode */
156 };
157
158 enum window_state {
159 WIN_VISIBLE = 1,
160 WIN_REDRAW = 2,
161 WIN_FOCUSED = 4
162 };
163
164 enum selection_type {
165 SEL_REGULAR = 1,
166 SEL_RECTANGULAR = 2
167 };
168
169 enum selection_snap {
170 SNAP_WORD = 1,
171 SNAP_LINE = 2
172 };
173
174 typedef unsigned char uchar;
175 typedef unsigned int uint;
176 typedef unsigned long ulong;
177 typedef unsigned short ushort;
178
179 typedef XftDraw *Draw;
180 typedef XftColor Colour;
181 typedef Colormap Colourmap;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode;
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colourmap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int fx, fy, fw, fh; /* fixed geometry */
254 int tw, th; /* tty width and height */
255 int w, h; /* window width and height */
256 int ch; /* char height */
257 int cw; /* char width */
258 char state; /* focus, redraw, visible */
259 } XWindow;
260
261 typedef struct {
262 uint b;
263 uint mask;
264 char *s;
265 } Mousekey;
266
267 typedef struct {
268 KeySym k;
269 uint mask;
270 char *s;
271 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
272 signed char appkey; /* application keypad */
273 signed char appcursor; /* application cursor */
274 signed char crlf; /* crlf mode */
275 } Key;
276
277 typedef struct {
278 int mode;
279 int type;
280 int snap;
281 /*
282 * Selection variables:
283 * nb – normalized coordinates of the beginning of the selection
284 * ne – normalized coordinates of the end of the selection
285 * ob – original coordinates of the beginning of the selection
286 * oe – original coordinates of the end of the selection
287 */
288 struct {
289 int x, y;
290 } nb, ne, ob, oe;
291
292 char *clip;
293 Atom xtarget;
294 bool alt;
295 struct timeval tclick1;
296 struct timeval tclick2;
297 } Selection;
298
299 typedef union {
300 int i;
301 uint ui;
302 float f;
303 const void *v;
304 } Arg;
305
306 typedef struct {
307 uint mod;
308 KeySym keysym;
309 void (*func)(const Arg *);
310 const Arg arg;
311 } Shortcut;
312
313 /* function definitions used in config.h */
314 static void clippaste(const Arg *);
315 static void numlock(const Arg *);
316 static void selpaste(const Arg *);
317 static void xzoom(const Arg *);
318 static void printsel(const Arg *);
319 static void printscreen(const Arg *) ;
320 static void toggleprinter(const Arg *);
321
322 /* Config.h for applying patches and the configuration. */
323 #include "config.h"
324
325 /* Font structure */
326 typedef struct {
327 int height;
328 int width;
329 int ascent;
330 int descent;
331 short lbearing;
332 short rbearing;
333 XftFont *match;
334 FcFontSet *set;
335 FcPattern *pattern;
336 } Font;
337
338 /* Drawing Context */
339 typedef struct {
340 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
341 Font font, bfont, ifont, ibfont;
342 GC gc;
343 } DC;
344
345 static void die(const char *, ...);
346 static void draw(void);
347 static void redraw(int);
348 static void drawregion(int, int, int, int);
349 static void execsh(void);
350 static void sigchld(int);
351 static void run(void);
352
353 static void csidump(void);
354 static void csihandle(void);
355 static void csiparse(void);
356 static void csireset(void);
357 static void strdump(void);
358 static void strhandle(void);
359 static void strparse(void);
360 static void strreset(void);
361
362 static int tattrset(int);
363 static void tprinter(char *, size_t);
364 static void tdumpsel(void);
365 static void tdumpline(int);
366 static void tdump(void);
367 static void tclearregion(int, int, int, int);
368 static void tcursor(int);
369 static void tdeletechar(int);
370 static void tdeleteline(int);
371 static void tinsertblank(int);
372 static void tinsertblankline(int);
373 static void tmoveto(int, int);
374 static void tmoveato(int, int);
375 static void tnew(int, int);
376 static void tnewline(int);
377 static void tputtab(bool);
378 static void tputc(char *, int);
379 static void treset(void);
380 static int tresize(int, int);
381 static void tscrollup(int, int);
382 static void tscrolldown(int, int);
383 static void tsetattr(int *, int);
384 static void tsetchar(char *, Glyph *, int, int);
385 static void tsetscroll(int, int);
386 static void tswapscreen(void);
387 static void tsetdirt(int, int);
388 static void tsetdirtattr(int);
389 static void tsetmode(bool, bool, int *, int);
390 static void tfulldirt(void);
391 static void techo(char *, int);
392 static int32_t tdefcolor(int *, int *, int);
393 static void tselcs(void);
394 static void tdeftran(char);
395 static inline bool match(uint, uint);
396 static void ttynew(void);
397 static void ttyread(void);
398 static void ttyresize(void);
399 static void ttysend(char *, size_t);
400 static void ttywrite(const char *, size_t);
401
402 static void xdraws(char *, Glyph, int, int, int, int);
403 static void xhints(void);
404 static void xclear(int, int, int, int);
405 static void xdrawcursor(void);
406 static void xinit(void);
407 static void xloadcols(void);
408 static int xsetcolorname(int, const char *);
409 static int xloadfont(Font *, FcPattern *);
410 static void xloadfonts(char *, double);
411 static int xloadfontset(Font *);
412 static void xsettitle(char *);
413 static void xresettitle(void);
414 static void xsetpointermotion(int);
415 static void xseturgency(int);
416 static void xsetsel(char *);
417 static void xtermclear(int, int, int, int);
418 static void xunloadfont(Font *);
419 static void xunloadfonts(void);
420 static void xresize(int, int);
421
422 static void expose(XEvent *);
423 static void visibility(XEvent *);
424 static void unmap(XEvent *);
425 static char *kmap(KeySym, uint);
426 static void kpress(XEvent *);
427 static void cmessage(XEvent *);
428 static void cresize(int, int);
429 static void resize(XEvent *);
430 static void focus(XEvent *);
431 static void brelease(XEvent *);
432 static void bpress(XEvent *);
433 static void bmotion(XEvent *);
434 static void selnotify(XEvent *);
435 static void selclear(XEvent *);
436 static void selrequest(XEvent *);
437
438 static void selinit(void);
439 static void selsort(void);
440 static inline bool selected(int, int);
441 static char *getsel(void);
442 static void selcopy(void);
443 static void selscroll(int, int);
444 static void selsnap(int, int *, int *, int);
445
446 static size_t utf8decode(char *, long *, size_t);
447 static long utf8decodebyte(char, size_t *);
448 static size_t utf8encode(long, char *, size_t);
449 static char utf8encodebyte(long, size_t);
450 static size_t utf8len(char *);
451 static size_t utf8validate(long *, size_t);
452
453 static ssize_t xwrite(int, char *, size_t);
454 static void *xmalloc(size_t);
455 static void *xrealloc(void *, size_t);
456 static char *xstrdup(char *);
457
458 static void (*handler[LASTEvent])(XEvent *) = {
459 [KeyPress] = kpress,
460 [ClientMessage] = cmessage,
461 [ConfigureNotify] = resize,
462 [VisibilityNotify] = visibility,
463 [UnmapNotify] = unmap,
464 [Expose] = expose,
465 [FocusIn] = focus,
466 [FocusOut] = focus,
467 [MotionNotify] = bmotion,
468 [ButtonPress] = bpress,
469 [ButtonRelease] = brelease,
470 [SelectionClear] = selclear,
471 [SelectionNotify] = selnotify,
472 [SelectionRequest] = selrequest,
473 };
474
475 /* Globals */
476 static DC dc;
477 static XWindow xw;
478 static Term term;
479 static CSIEscape csiescseq;
480 static STREscape strescseq;
481 static int cmdfd;
482 static pid_t pid;
483 static Selection sel;
484 static int iofd = STDOUT_FILENO;
485 static char **opt_cmd = NULL;
486 static char *opt_io = NULL;
487 static char *opt_title = NULL;
488 static char *opt_embed = NULL;
489 static char *opt_class = NULL;
490 static char *opt_font = NULL;
491 static int oldbutton = 3; /* button event on startup: 3 = release */
492
493 static char *usedfont = NULL;
494 static double usedfontsize = 0;
495
496 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
497 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
498 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
499 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
500
501 /* Font Ring Cache */
502 enum {
503 FRC_NORMAL,
504 FRC_ITALIC,
505 FRC_BOLD,
506 FRC_ITALICBOLD
507 };
508
509 typedef struct {
510 XftFont *font;
511 int flags;
512 } Fontcache;
513
514 /* Fontcache is an array now. A new font will be appended to the array. */
515 static Fontcache frc[16];
516 static int frclen = 0;
517
518 ssize_t
519 xwrite(int fd, char *s, size_t len) {
520 size_t aux = len;
521
522 while(len > 0) {
523 ssize_t r = write(fd, s, len);
524 if(r < 0)
525 return r;
526 len -= r;
527 s += r;
528 }
529 return aux;
530 }
531
532 void *
533 xmalloc(size_t len) {
534 void *p = malloc(len);
535
536 if(!p)
537 die("Out of memory\n");
538
539 return p;
540 }
541
542 void *
543 xrealloc(void *p, size_t len) {
544 if((p = realloc(p, len)) == NULL)
545 die("Out of memory\n");
546
547 return p;
548 }
549
550 char *
551 xstrdup(char *s) {
552 char *p = strdup(s);
553
554 if (!p)
555 die("Out of memory\n");
556
557 return p;
558 }
559
560 size_t
561 utf8decode(char *c, long *u, size_t clen) {
562 size_t i, j, len, type;
563 long udecoded;
564
565 *u = UTF_INVALID;
566 if(!clen)
567 return 0;
568 udecoded = utf8decodebyte(c[0], &len);
569 if(!BETWEEN(len, 1, UTF_SIZ))
570 return 1;
571 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
572 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
573 if(type != 0)
574 return j;
575 }
576 if(j < len)
577 return 0;
578 *u = udecoded;
579 utf8validate(u, len);
580 return len;
581 }
582
583 long
584 utf8decodebyte(char c, size_t *i) {
585 for(*i = 0; *i < LEN(utfmask); ++(*i))
586 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
587 return (uchar)c & ~utfmask[*i];
588 return 0;
589 }
590
591 size_t
592 utf8encode(long u, char *c, size_t clen) {
593 size_t len, i;
594
595 len = utf8validate(&u, 0);
596 if(clen < len)
597 return 0;
598 for(i = len - 1; i != 0; --i) {
599 c[i] = utf8encodebyte(u, 0);
600 u >>= 6;
601 }
602 c[0] = utf8encodebyte(u, len);
603 return len;
604 }
605
606 char
607 utf8encodebyte(long u, size_t i) {
608 return utfbyte[i] | (u & ~utfmask[i]);
609 }
610
611 size_t
612 utf8len(char *c) {
613 return utf8decode(c, &(long){0}, UTF_SIZ);
614 }
615
616 size_t
617 utf8validate(long *u, size_t i) {
618 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
619 *u = UTF_INVALID;
620 for(i = 1; *u > utfmax[i]; ++i)
621 ;
622 return i;
623 }
624
625 static void
626 selinit(void) {
627 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
628 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
629 sel.mode = 0;
630 sel.ob.x = -1;
631 sel.clip = NULL;
632 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
633 if(sel.xtarget == None)
634 sel.xtarget = XA_STRING;
635 }
636
637 static int
638 x2col(int x) {
639 x -= borderpx;
640 x /= xw.cw;
641
642 return LIMIT(x, 0, term.col-1);
643 }
644
645 static int
646 y2row(int y) {
647 y -= borderpx;
648 y /= xw.ch;
649
650 return LIMIT(y, 0, term.row-1);
651 }
652
653 static void
654 selsort(void) {
655 if(sel.ob.y == sel.oe.y) {
656 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
657 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
658 } else {
659 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
660 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
661 }
662 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
663 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
664 }
665
666 static inline bool
667 selected(int x, int y) {
668 if(sel.ne.y == y && sel.nb.y == y)
669 return BETWEEN(x, sel.nb.x, sel.ne.x);
670
671 if(sel.type == SEL_RECTANGULAR) {
672 return ((sel.nb.y <= y && y <= sel.ne.y)
673 && (sel.nb.x <= x && x <= sel.ne.x));
674 }
675
676 return ((sel.nb.y < y && y < sel.ne.y)
677 || (y == sel.ne.y && x <= sel.ne.x))
678 || (y == sel.nb.y && x >= sel.nb.x
679 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
680 }
681
682 void
683 selsnap(int mode, int *x, int *y, int direction) {
684 int i;
685
686 switch(mode) {
687 case SNAP_WORD:
688 /*
689 * Snap around if the word wraps around at the end or
690 * beginning of a line.
691 */
692 for(;;) {
693 if(direction < 0 && *x <= 0) {
694 if(*y > 0 && term.line[*y - 1][term.col-1].mode
695 & ATTR_WRAP) {
696 *y -= 1;
697 *x = term.col-1;
698 } else {
699 break;
700 }
701 }
702 if(direction > 0 && *x >= term.col-1) {
703 if(*y < term.row-1 && term.line[*y][*x].mode
704 & ATTR_WRAP) {
705 *y += 1;
706 *x = 0;
707 } else {
708 break;
709 }
710 }
711
712 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
713 *x += direction;
714 continue;
715 }
716
717 if(strchr(worddelimiters,
718 term.line[*y][*x+direction].c[0])) {
719 break;
720 }
721
722 *x += direction;
723 }
724 break;
725 case SNAP_LINE:
726 /*
727 * Snap around if the the previous line or the current one
728 * has set ATTR_WRAP at its end. Then the whole next or
729 * previous line will be selected.
730 */
731 *x = (direction < 0) ? 0 : term.col - 1;
732 if(direction < 0 && *y > 0) {
733 for(; *y > 0; *y += direction) {
734 if(!(term.line[*y-1][term.col-1].mode
735 & ATTR_WRAP)) {
736 break;
737 }
738 }
739 } else if(direction > 0 && *y < term.row-1) {
740 for(; *y < term.row; *y += direction) {
741 if(!(term.line[*y][term.col-1].mode
742 & ATTR_WRAP)) {
743 break;
744 }
745 }
746 }
747 break;
748 default:
749 /*
750 * Select the whole line when the end of line is reached.
751 */
752 if(direction > 0) {
753 i = term.col;
754 while(--i > 0 && term.line[*y][i].c[0] == ' ')
755 /* nothing */;
756 if(i > 0 && i < *x)
757 *x = term.col - 1;
758 }
759 break;
760 }
761 }
762
763 void
764 getbuttoninfo(XEvent *e) {
765 int type;
766 uint state = e->xbutton.state &~Button1Mask;
767
768 sel.alt = IS_SET(MODE_ALTSCREEN);
769
770 sel.oe.x = x2col(e->xbutton.x);
771 sel.oe.y = y2row(e->xbutton.y);
772
773 if(sel.ob.y < sel.oe.y
774 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
775 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
776 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
777 } else {
778 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
779 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
780 }
781 selsort();
782
783 sel.type = SEL_REGULAR;
784 for(type = 1; type < LEN(selmasks); ++type) {
785 if(match(selmasks[type], state)) {
786 sel.type = type;
787 break;
788 }
789 }
790 }
791
792 void
793 mousereport(XEvent *e) {
794 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
795 button = e->xbutton.button, state = e->xbutton.state,
796 len;
797 char buf[40];
798 static int ox, oy;
799
800 /* from urxvt */
801 if(e->xbutton.type == MotionNotify) {
802 if(x == ox && y == oy)
803 return;
804 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
805 return;
806 /* MOUSE_MOTION: no reporting if no button is pressed */
807 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
808 return;
809
810 button = oldbutton + 32;
811 ox = x;
812 oy = y;
813 } else {
814 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
815 button = 3;
816 } else {
817 button -= Button1;
818 if(button >= 3)
819 button += 64 - 3;
820 }
821 if(e->xbutton.type == ButtonPress) {
822 oldbutton = button;
823 ox = x;
824 oy = y;
825 } else if(e->xbutton.type == ButtonRelease) {
826 oldbutton = 3;
827 /* MODE_MOUSEX10: no button release reporting */
828 if(IS_SET(MODE_MOUSEX10))
829 return;
830 }
831 }
832
833 if(!IS_SET(MODE_MOUSEX10)) {
834 button += (state & ShiftMask ? 4 : 0)
835 + (state & Mod4Mask ? 8 : 0)
836 + (state & ControlMask ? 16 : 0);
837 }
838
839 len = 0;
840 if(IS_SET(MODE_MOUSESGR)) {
841 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
842 button, x+1, y+1,
843 e->xbutton.type == ButtonRelease ? 'm' : 'M');
844 } else if(x < 223 && y < 223) {
845 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
846 32+button, 32+x+1, 32+y+1);
847 } else {
848 return;
849 }
850
851 ttywrite(buf, len);
852 }
853
854 void
855 bpress(XEvent *e) {
856 struct timeval now;
857 Mousekey *mk;
858
859 if(IS_SET(MODE_MOUSE)) {
860 mousereport(e);
861 return;
862 }
863
864 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
865 if(e->xbutton.button == mk->b
866 && match(mk->mask, e->xbutton.state)) {
867 ttysend(mk->s, strlen(mk->s));
868 return;
869 }
870 }
871
872 if(e->xbutton.button == Button1) {
873 gettimeofday(&now, NULL);
874
875 /* Clear previous selection, logically and visually. */
876 selclear(NULL);
877 sel.mode = 1;
878 sel.type = SEL_REGULAR;
879 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
880 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
881
882 /*
883 * If the user clicks below predefined timeouts specific
884 * snapping behaviour is exposed.
885 */
886 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
887 sel.snap = SNAP_LINE;
888 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
889 sel.snap = SNAP_WORD;
890 } else {
891 sel.snap = 0;
892 }
893 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
894 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
895 selsort();
896
897 /*
898 * Draw selection, unless it's regular and we don't want to
899 * make clicks visible
900 */
901 if(sel.snap != 0) {
902 sel.mode++;
903 tsetdirt(sel.nb.y, sel.ne.y);
904 }
905 sel.tclick2 = sel.tclick1;
906 sel.tclick1 = now;
907 }
908 }
909
910 char *
911 getsel(void) {
912 char *str, *ptr;
913 int x, y, bufsize, size, i, ex;
914 Glyph *gp, *last;
915
916 if(sel.ob.x == -1) {
917 str = NULL;
918 } else {
919 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
920 ptr = str = xmalloc(bufsize);
921
922 /* append every set & selected glyph to the selection */
923 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
924 gp = &term.line[y][0];
925 last = &gp[term.col-1];
926
927 while(last >= gp && !(selected(last - gp, y) &&
928 strcmp(last->c, " ") != 0)) {
929 --last;
930 }
931
932 for(x = 0; gp <= last; x++, ++gp) {
933 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
934 continue;
935
936 size = utf8len(gp->c);
937 memcpy(ptr, gp->c, size);
938 ptr += size;
939 }
940
941 /*
942 * Copy and pasting of line endings is inconsistent
943 * in the inconsistent terminal and GUI world.
944 * The best solution seems like to produce '\n' when
945 * something is copied from st and convert '\n' to
946 * '\r', when something to be pasted is received by
947 * st.
948 * FIXME: Fix the computer world.
949 */
950 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
951 *ptr++ = '\n';
952
953 /*
954 * If the last selected line expands in the selection
955 * after the visible text '\n' is appended.
956 */
957 if(y == sel.ne.y) {
958 i = term.col;
959 while(--i > 0 && term.line[y][i].c[0] == ' ')
960 /* nothing */;
961 ex = sel.ne.x;
962 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
963 ex = sel.nb.x;
964 if(i < ex)
965 *ptr++ = '\n';
966 }
967 }
968 *ptr = 0;
969 }
970 return str;
971 }
972
973 void
974 selcopy(void) {
975 xsetsel(getsel());
976 }
977
978 void
979 selnotify(XEvent *e) {
980 ulong nitems, ofs, rem;
981 int format;
982 uchar *data, *last, *repl;
983 Atom type;
984
985 ofs = 0;
986 do {
987 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
988 False, AnyPropertyType, &type, &format,
989 &nitems, &rem, &data)) {
990 fprintf(stderr, "Clipboard allocation failed\n");
991 return;
992 }
993
994 /*
995 * As seen in selcopy:
996 * Line endings are inconsistent in the terminal and GUI world
997 * copy and pasting. When receiving some selection data,
998 * replace all '\n' with '\r'.
999 * FIXME: Fix the computer world.
1000 */
1001 repl = data;
1002 last = data + nitems * format / 8;
1003 while((repl = memchr(repl, '\n', last - repl))) {
1004 *repl++ = '\r';
1005 }
1006
1007 if(IS_SET(MODE_BRCKTPASTE))
1008 ttywrite("\033[200~", 6);
1009 ttysend((char *)data, nitems * format / 8);
1010 if(IS_SET(MODE_BRCKTPASTE))
1011 ttywrite("\033[201~", 6);
1012 XFree(data);
1013 /* number of 32-bit chunks returned */
1014 ofs += nitems * format / 32;
1015 } while(rem > 0);
1016 }
1017
1018 void
1019 selpaste(const Arg *dummy) {
1020 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1021 xw.win, CurrentTime);
1022 }
1023
1024 void
1025 clippaste(const Arg *dummy) {
1026 Atom clipboard;
1027
1028 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1029 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1030 xw.win, CurrentTime);
1031 }
1032
1033 void
1034 selclear(XEvent *e) {
1035 if(sel.ob.x == -1)
1036 return;
1037 sel.ob.x = -1;
1038 tsetdirt(sel.nb.y, sel.ne.y);
1039 }
1040
1041 void
1042 selrequest(XEvent *e) {
1043 XSelectionRequestEvent *xsre;
1044 XSelectionEvent xev;
1045 Atom xa_targets, string;
1046
1047 xsre = (XSelectionRequestEvent *) e;
1048 xev.type = SelectionNotify;
1049 xev.requestor = xsre->requestor;
1050 xev.selection = xsre->selection;
1051 xev.target = xsre->target;
1052 xev.time = xsre->time;
1053 /* reject */
1054 xev.property = None;
1055
1056 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1057 if(xsre->target == xa_targets) {
1058 /* respond with the supported type */
1059 string = sel.xtarget;
1060 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1061 XA_ATOM, 32, PropModeReplace,
1062 (uchar *) &string, 1);
1063 xev.property = xsre->property;
1064 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1065 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1066 xsre->target, 8, PropModeReplace,
1067 (uchar *) sel.clip, strlen(sel.clip));
1068 xev.property = xsre->property;
1069 }
1070
1071 /* all done, send a notification to the listener */
1072 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1073 fprintf(stderr, "Error sending SelectionNotify event\n");
1074 }
1075
1076 void
1077 xsetsel(char *str) {
1078 /* register the selection for both the clipboard and the primary */
1079 Atom clipboard;
1080
1081 free(sel.clip);
1082 sel.clip = str;
1083
1084 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1085
1086 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1087 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1088 }
1089
1090 void
1091 brelease(XEvent *e) {
1092 if(IS_SET(MODE_MOUSE)) {
1093 mousereport(e);
1094 return;
1095 }
1096
1097 if(e->xbutton.button == Button2) {
1098 selpaste(NULL);
1099 } else if(e->xbutton.button == Button1) {
1100 if(sel.mode < 2) {
1101 selclear(NULL);
1102 } else {
1103 getbuttoninfo(e);
1104 selcopy();
1105 }
1106 sel.mode = 0;
1107 tsetdirt(sel.nb.y, sel.ne.y);
1108 }
1109 }
1110
1111 void
1112 bmotion(XEvent *e) {
1113 int oldey, oldex, oldsby, oldsey;
1114
1115 if(IS_SET(MODE_MOUSE)) {
1116 mousereport(e);
1117 return;
1118 }
1119
1120 if(!sel.mode)
1121 return;
1122
1123 sel.mode++;
1124 oldey = sel.oe.y;
1125 oldex = sel.oe.x;
1126 oldsby = sel.nb.y;
1127 oldsey = sel.ne.y;
1128 getbuttoninfo(e);
1129
1130 if(oldey != sel.oe.y || oldex != sel.oe.x)
1131 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1132 }
1133
1134 void
1135 die(const char *errstr, ...) {
1136 va_list ap;
1137
1138 va_start(ap, errstr);
1139 vfprintf(stderr, errstr, ap);
1140 va_end(ap);
1141 exit(EXIT_FAILURE);
1142 }
1143
1144 void
1145 execsh(void) {
1146 char **args;
1147 char *envshell = getenv("SHELL");
1148 const struct passwd *pass = getpwuid(getuid());
1149 char buf[sizeof(long) * 8 + 1];
1150
1151 unsetenv("COLUMNS");
1152 unsetenv("LINES");
1153 unsetenv("TERMCAP");
1154
1155 if(pass) {
1156 setenv("LOGNAME", pass->pw_name, 1);
1157 setenv("USER", pass->pw_name, 1);
1158 setenv("SHELL", pass->pw_shell, 0);
1159 setenv("HOME", pass->pw_dir, 0);
1160 }
1161
1162 snprintf(buf, sizeof(buf), "%lu", xw.win);
1163 setenv("WINDOWID", buf, 1);
1164
1165 signal(SIGCHLD, SIG_DFL);
1166 signal(SIGHUP, SIG_DFL);
1167 signal(SIGINT, SIG_DFL);
1168 signal(SIGQUIT, SIG_DFL);
1169 signal(SIGTERM, SIG_DFL);
1170 signal(SIGALRM, SIG_DFL);
1171
1172 DEFAULT(envshell, shell);
1173 setenv("TERM", termname, 1);
1174 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1175 execvp(args[0], args);
1176 exit(EXIT_FAILURE);
1177 }
1178
1179 void
1180 sigchld(int a) {
1181 int stat = 0;
1182
1183 if(waitpid(pid, &stat, 0) < 0)
1184 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1185
1186 if(WIFEXITED(stat)) {
1187 exit(WEXITSTATUS(stat));
1188 } else {
1189 exit(EXIT_FAILURE);
1190 }
1191 }
1192
1193 void
1194 ttynew(void) {
1195 int m, s;
1196 struct winsize w = {term.row, term.col, 0, 0};
1197
1198 /* seems to work fine on linux, openbsd and freebsd */
1199 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1200 die("openpty failed: %s\n", strerror(errno));
1201
1202 switch(pid = fork()) {
1203 case -1:
1204 die("fork failed\n");
1205 break;
1206 case 0:
1207 setsid(); /* create a new process group */
1208 dup2(s, STDIN_FILENO);
1209 dup2(s, STDOUT_FILENO);
1210 dup2(s, STDERR_FILENO);
1211 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1212 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1213 close(s);
1214 close(m);
1215 execsh();
1216 break;
1217 default:
1218 close(s);
1219 cmdfd = m;
1220 signal(SIGCHLD, sigchld);
1221 if(opt_io) {
1222 term.mode |= MODE_PRINT;
1223 iofd = (!strcmp(opt_io, "-")) ?
1224 STDOUT_FILENO :
1225 open(opt_io, O_WRONLY | O_CREAT, 0666);
1226 if(iofd < 0) {
1227 fprintf(stderr, "Error opening %s:%s\n",
1228 opt_io, strerror(errno));
1229 }
1230 }
1231 }
1232 }
1233
1234 void
1235 dump(char c) {
1236 static int col;
1237
1238 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1239 if(++col % 10 == 0)
1240 fprintf(stderr, "\n");
1241 }
1242
1243 void
1244 ttyread(void) {
1245 static char buf[BUFSIZ];
1246 static int buflen = 0;
1247 char *ptr;
1248 char s[UTF_SIZ];
1249 int charsize; /* size of utf8 char in bytes */
1250 long unicodep;
1251 int ret;
1252
1253 /* append read bytes to unprocessed bytes */
1254 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1255 die("Couldn't read from shell: %s\n", strerror(errno));
1256
1257 /* process every complete utf8 char */
1258 buflen += ret;
1259 ptr = buf;
1260 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1261 utf8encode(unicodep, s, UTF_SIZ);
1262 tputc(s, charsize);
1263 ptr += charsize;
1264 buflen -= charsize;
1265 }
1266
1267 /* keep any uncomplete utf8 char for the next call */
1268 memmove(buf, ptr, buflen);
1269 }
1270
1271 void
1272 ttywrite(const char *s, size_t n) {
1273 if(write(cmdfd, s, n) == -1)
1274 die("write error on tty: %s\n", strerror(errno));
1275 }
1276
1277 void
1278 ttysend(char *s, size_t n) {
1279 ttywrite(s, n);
1280 if(IS_SET(MODE_ECHO))
1281 techo(s, n);
1282 }
1283
1284 void
1285 ttyresize(void) {
1286 struct winsize w;
1287
1288 w.ws_row = term.row;
1289 w.ws_col = term.col;
1290 w.ws_xpixel = xw.tw;
1291 w.ws_ypixel = xw.th;
1292 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1293 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1294 }
1295
1296 int
1297 tattrset(int attr) {
1298 int i, j;
1299
1300 for(i = 0; i < term.row-1; i++) {
1301 for(j = 0; j < term.col-1; j++) {
1302 if(term.line[i][j].mode & attr)
1303 return 1;
1304 }
1305 }
1306
1307 return 0;
1308 }
1309
1310 void
1311 tsetdirt(int top, int bot) {
1312 int i;
1313
1314 LIMIT(top, 0, term.row-1);
1315 LIMIT(bot, 0, term.row-1);
1316
1317 for(i = top; i <= bot; i++)
1318 term.dirty[i] = 1;
1319 }
1320
1321 void
1322 tsetdirtattr(int attr) {
1323 int i, j;
1324
1325 for(i = 0; i < term.row-1; i++) {
1326 for(j = 0; j < term.col-1; j++) {
1327 if(term.line[i][j].mode & attr) {
1328 tsetdirt(i, i);
1329 break;
1330 }
1331 }
1332 }
1333 }
1334
1335 void
1336 tfulldirt(void) {
1337 tsetdirt(0, term.row-1);
1338 }
1339
1340 void
1341 tcursor(int mode) {
1342 static TCursor c[2];
1343 bool alt = IS_SET(MODE_ALTSCREEN);
1344
1345 if(mode == CURSOR_SAVE) {
1346 c[alt] = term.c;
1347 } else if(mode == CURSOR_LOAD) {
1348 term.c = c[alt];
1349 tmoveto(c[alt].x, c[alt].y);
1350 }
1351 }
1352
1353 void
1354 treset(void) {
1355 uint i;
1356
1357 term.c = (TCursor){{
1358 .mode = ATTR_NULL,
1359 .fg = defaultfg,
1360 .bg = defaultbg
1361 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1362
1363 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1364 for(i = tabspaces; i < term.col; i += tabspaces)
1365 term.tabs[i] = 1;
1366 term.top = 0;
1367 term.bot = term.row - 1;
1368 term.mode = MODE_WRAP;
1369 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1370 term.charset = 0;
1371
1372 tclearregion(0, 0, term.col-1, term.row-1);
1373 tmoveto(0, 0);
1374 tcursor(CURSOR_SAVE);
1375 }
1376
1377 void
1378 tnew(int col, int row) {
1379 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1380 tresize(col, row);
1381 term.numlock = 1;
1382
1383 treset();
1384 }
1385
1386 void
1387 tswapscreen(void) {
1388 Line *tmp = term.line;
1389
1390 term.line = term.alt;
1391 term.alt = tmp;
1392 term.mode ^= MODE_ALTSCREEN;
1393 tfulldirt();
1394 }
1395
1396 void
1397 tscrolldown(int orig, int n) {
1398 int i;
1399 Line temp;
1400
1401 LIMIT(n, 0, term.bot-orig+1);
1402
1403 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1404
1405 for(i = term.bot; i >= orig+n; i--) {
1406 temp = term.line[i];
1407 term.line[i] = term.line[i-n];
1408 term.line[i-n] = temp;
1409
1410 term.dirty[i] = 1;
1411 term.dirty[i-n] = 1;
1412 }
1413
1414 selscroll(orig, n);
1415 }
1416
1417 void
1418 tscrollup(int orig, int n) {
1419 int i;
1420 Line temp;
1421 LIMIT(n, 0, term.bot-orig+1);
1422
1423 tclearregion(0, orig, term.col-1, orig+n-1);
1424
1425 for(i = orig; i <= term.bot-n; i++) {
1426 temp = term.line[i];
1427 term.line[i] = term.line[i+n];
1428 term.line[i+n] = temp;
1429
1430 term.dirty[i] = 1;
1431 term.dirty[i+n] = 1;
1432 }
1433
1434 selscroll(orig, -n);
1435 }
1436
1437 void
1438 selscroll(int orig, int n) {
1439 if(sel.ob.x == -1)
1440 return;
1441
1442 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1443 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1444 selclear(NULL);
1445 return;
1446 }
1447 if(sel.type == SEL_RECTANGULAR) {
1448 if(sel.ob.y < term.top)
1449 sel.ob.y = term.top;
1450 if(sel.oe.y > term.bot)
1451 sel.oe.y = term.bot;
1452 } else {
1453 if(sel.ob.y < term.top) {
1454 sel.ob.y = term.top;
1455 sel.ob.x = 0;
1456 }
1457 if(sel.oe.y > term.bot) {
1458 sel.oe.y = term.bot;
1459 sel.oe.x = term.col;
1460 }
1461 }
1462 selsort();
1463 }
1464 }
1465
1466 void
1467 tnewline(int first_col) {
1468 int y = term.c.y;
1469
1470 if(y == term.bot) {
1471 tscrollup(term.top, 1);
1472 } else {
1473 y++;
1474 }
1475 tmoveto(first_col ? 0 : term.c.x, y);
1476 }
1477
1478 void
1479 csiparse(void) {
1480 char *p = csiescseq.buf, *np;
1481 long int v;
1482
1483 csiescseq.narg = 0;
1484 if(*p == '?') {
1485 csiescseq.priv = 1;
1486 p++;
1487 }
1488
1489 csiescseq.buf[csiescseq.len] = '\0';
1490 while(p < csiescseq.buf+csiescseq.len) {
1491 np = NULL;
1492 v = strtol(p, &np, 10);
1493 if(np == p)
1494 v = 0;
1495 if(v == LONG_MAX || v == LONG_MIN)
1496 v = -1;
1497 csiescseq.arg[csiescseq.narg++] = v;
1498 p = np;
1499 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1500 break;
1501 p++;
1502 }
1503 csiescseq.mode = *p;
1504 }
1505
1506 /* for absolute user moves, when decom is set */
1507 void
1508 tmoveato(int x, int y) {
1509 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1510 }
1511
1512 void
1513 tmoveto(int x, int y) {
1514 int miny, maxy;
1515
1516 if(term.c.state & CURSOR_ORIGIN) {
1517 miny = term.top;
1518 maxy = term.bot;
1519 } else {
1520 miny = 0;
1521 maxy = term.row - 1;
1522 }
1523 LIMIT(x, 0, term.col-1);
1524 LIMIT(y, miny, maxy);
1525 term.c.state &= ~CURSOR_WRAPNEXT;
1526 term.c.x = x;
1527 term.c.y = y;
1528 }
1529
1530 void
1531 tsetchar(char *c, Glyph *attr, int x, int y) {
1532 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1533 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1534 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1535 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1536 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1537 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1538 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1539 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1540 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1541 };
1542
1543 /*
1544 * The table is proudly stolen from rxvt.
1545 */
1546 if(attr->mode & ATTR_GFX) {
1547 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1548 c = vt100_0[c[0] - 0x41];
1549 }
1550 }
1551
1552 if(term.line[y][x].mode & ATTR_WIDE) {
1553 if(x+1 < term.col) {
1554 term.line[y][x+1].c[0] = ' ';
1555 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1556 }
1557 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1558 term.line[y][x-1].c[0] = ' ';
1559 term.line[y][x-1].mode &= ~ATTR_WIDE;
1560 }
1561
1562 term.dirty[y] = 1;
1563 term.line[y][x] = *attr;
1564 memcpy(term.line[y][x].c, c, UTF_SIZ);
1565 }
1566
1567 void
1568 tclearregion(int x1, int y1, int x2, int y2) {
1569 int x, y, temp;
1570
1571 if(x1 > x2)
1572 temp = x1, x1 = x2, x2 = temp;
1573 if(y1 > y2)
1574 temp = y1, y1 = y2, y2 = temp;
1575
1576 LIMIT(x1, 0, term.col-1);
1577 LIMIT(x2, 0, term.col-1);
1578 LIMIT(y1, 0, term.row-1);
1579 LIMIT(y2, 0, term.row-1);
1580
1581 for(y = y1; y <= y2; y++) {
1582 term.dirty[y] = 1;
1583 for(x = x1; x <= x2; x++) {
1584 if(selected(x, y))
1585 selclear(NULL);
1586 term.line[y][x] = term.c.attr;
1587 memcpy(term.line[y][x].c, " ", 2);
1588 }
1589 }
1590 }
1591
1592 void
1593 tdeletechar(int n) {
1594 int src = term.c.x + n;
1595 int dst = term.c.x;
1596 int size = term.col - src;
1597
1598 term.dirty[term.c.y] = 1;
1599
1600 if(src >= term.col) {
1601 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1602 return;
1603 }
1604
1605 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1606 size * sizeof(Glyph));
1607 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1608 }
1609
1610 void
1611 tinsertblank(int n) {
1612 int src = term.c.x;
1613 int dst = src + n;
1614 int size = term.col - dst;
1615
1616 term.dirty[term.c.y] = 1;
1617
1618 if(dst >= term.col) {
1619 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1620 return;
1621 }
1622
1623 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1624 size * sizeof(Glyph));
1625 tclearregion(src, term.c.y, dst - 1, term.c.y);
1626 }
1627
1628 void
1629 tinsertblankline(int n) {
1630 if(BETWEEN(term.c.y, term.top, term.bot))
1631 tscrolldown(term.c.y, n);
1632 }
1633
1634 void
1635 tdeleteline(int n) {
1636 if(BETWEEN(term.c.y, term.top, term.bot))
1637 tscrollup(term.c.y, n);
1638 }
1639
1640 int32_t
1641 tdefcolor(int *attr, int *npar, int l) {
1642 int32_t idx = -1;
1643 uint r, g, b;
1644
1645 switch (attr[*npar + 1]) {
1646 case 2: /* direct colour in RGB space */
1647 if (*npar + 4 >= l) {
1648 fprintf(stderr,
1649 "erresc(38): Incorrect number of parameters (%d)\n",
1650 *npar);
1651 break;
1652 }
1653 r = attr[*npar + 2];
1654 g = attr[*npar + 3];
1655 b = attr[*npar + 4];
1656 *npar += 4;
1657 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1658 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1659 r, g, b);
1660 else
1661 idx = TRUECOLOR(r, g, b);
1662 break;
1663 case 5: /* indexed colour */
1664 if (*npar + 2 >= l) {
1665 fprintf(stderr,
1666 "erresc(38): Incorrect number of parameters (%d)\n",
1667 *npar);
1668 break;
1669 }
1670 *npar += 2;
1671 if(!BETWEEN(attr[*npar], 0, 255))
1672 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1673 else
1674 idx = attr[*npar];
1675 break;
1676 case 0: /* implemented defined (only foreground) */
1677 case 1: /* transparent */
1678 case 3: /* direct colour in CMY space */
1679 case 4: /* direct colour in CMYK space */
1680 default:
1681 fprintf(stderr,
1682 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1683 }
1684
1685 return idx;
1686 }
1687
1688 void
1689 tsetattr(int *attr, int l) {
1690 int i;
1691 int32_t idx;
1692
1693 for(i = 0; i < l; i++) {
1694 switch(attr[i]) {
1695 case 0:
1696 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1697 | ATTR_BOLD | ATTR_ITALIC \
1698 | ATTR_BLINK);
1699 term.c.attr.fg = defaultfg;
1700 term.c.attr.bg = defaultbg;
1701 break;
1702 case 1:
1703 term.c.attr.mode |= ATTR_BOLD;
1704 break;
1705 case 3:
1706 term.c.attr.mode |= ATTR_ITALIC;
1707 break;
1708 case 4:
1709 term.c.attr.mode |= ATTR_UNDERLINE;
1710 break;
1711 case 5: /* slow blink */
1712 case 6: /* rapid blink */
1713 term.c.attr.mode |= ATTR_BLINK;
1714 break;
1715 case 7:
1716 term.c.attr.mode |= ATTR_REVERSE;
1717 break;
1718 case 21:
1719 case 22:
1720 term.c.attr.mode &= ~ATTR_BOLD;
1721 break;
1722 case 23:
1723 term.c.attr.mode &= ~ATTR_ITALIC;
1724 break;
1725 case 24:
1726 term.c.attr.mode &= ~ATTR_UNDERLINE;
1727 break;
1728 case 25:
1729 case 26:
1730 term.c.attr.mode &= ~ATTR_BLINK;
1731 break;
1732 case 27:
1733 term.c.attr.mode &= ~ATTR_REVERSE;
1734 break;
1735 case 38:
1736 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1737 term.c.attr.fg = idx;
1738 break;
1739 case 39:
1740 term.c.attr.fg = defaultfg;
1741 break;
1742 case 48:
1743 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1744 term.c.attr.bg = idx;
1745 break;
1746 case 49:
1747 term.c.attr.bg = defaultbg;
1748 break;
1749 default:
1750 if(BETWEEN(attr[i], 30, 37)) {
1751 term.c.attr.fg = attr[i] - 30;
1752 } else if(BETWEEN(attr[i], 40, 47)) {
1753 term.c.attr.bg = attr[i] - 40;
1754 } else if(BETWEEN(attr[i], 90, 97)) {
1755 term.c.attr.fg = attr[i] - 90 + 8;
1756 } else if(BETWEEN(attr[i], 100, 107)) {
1757 term.c.attr.bg = attr[i] - 100 + 8;
1758 } else {
1759 fprintf(stderr,
1760 "erresc(default): gfx attr %d unknown\n",
1761 attr[i]), csidump();
1762 }
1763 break;
1764 }
1765 }
1766 }
1767
1768 void
1769 tsetscroll(int t, int b) {
1770 int temp;
1771
1772 LIMIT(t, 0, term.row-1);
1773 LIMIT(b, 0, term.row-1);
1774 if(t > b) {
1775 temp = t;
1776 t = b;
1777 b = temp;
1778 }
1779 term.top = t;
1780 term.bot = b;
1781 }
1782
1783 void
1784 tsetmode(bool priv, bool set, int *args, int narg) {
1785 int *lim, mode;
1786 bool alt;
1787
1788 for(lim = args + narg; args < lim; ++args) {
1789 if(priv) {
1790 switch(*args) {
1791 break;
1792 case 1: /* DECCKM -- Cursor key */
1793 MODBIT(term.mode, set, MODE_APPCURSOR);
1794 break;
1795 case 5: /* DECSCNM -- Reverse video */
1796 mode = term.mode;
1797 MODBIT(term.mode, set, MODE_REVERSE);
1798 if(mode != term.mode)
1799 redraw(REDRAW_TIMEOUT);
1800 break;
1801 case 6: /* DECOM -- Origin */
1802 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1803 tmoveato(0, 0);
1804 break;
1805 case 7: /* DECAWM -- Auto wrap */
1806 MODBIT(term.mode, set, MODE_WRAP);
1807 break;
1808 case 0: /* Error (IGNORED) */
1809 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1810 case 3: /* DECCOLM -- Column (IGNORED) */
1811 case 4: /* DECSCLM -- Scroll (IGNORED) */
1812 case 8: /* DECARM -- Auto repeat (IGNORED) */
1813 case 18: /* DECPFF -- Printer feed (IGNORED) */
1814 case 19: /* DECPEX -- Printer extent (IGNORED) */
1815 case 42: /* DECNRCM -- National characters (IGNORED) */
1816 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1817 break;
1818 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1819 MODBIT(term.mode, !set, MODE_HIDE);
1820 break;
1821 case 9: /* X10 mouse compatibility mode */
1822 xsetpointermotion(0);
1823 MODBIT(term.mode, 0, MODE_MOUSE);
1824 MODBIT(term.mode, set, MODE_MOUSEX10);
1825 break;
1826 case 1000: /* 1000: report button press */
1827 xsetpointermotion(0);
1828 MODBIT(term.mode, 0, MODE_MOUSE);
1829 MODBIT(term.mode, set, MODE_MOUSEBTN);
1830 break;
1831 case 1002: /* 1002: report motion on button press */
1832 xsetpointermotion(0);
1833 MODBIT(term.mode, 0, MODE_MOUSE);
1834 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1835 break;
1836 case 1003: /* 1003: enable all mouse motions */
1837 xsetpointermotion(set);
1838 MODBIT(term.mode, 0, MODE_MOUSE);
1839 MODBIT(term.mode, set, MODE_MOUSEMANY);
1840 break;
1841 case 1004: /* 1004: send focus events to tty */
1842 MODBIT(term.mode, set, MODE_FOCUS);
1843 break;
1844 case 1006: /* 1006: extended reporting mode */
1845 MODBIT(term.mode, set, MODE_MOUSESGR);
1846 break;
1847 case 1034:
1848 MODBIT(term.mode, set, MODE_8BIT);
1849 break;
1850 case 1049: /* swap screen & set/restore cursor as xterm */
1851 if (!allowaltscreen)
1852 break;
1853 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1854 /* FALLTHRU */
1855 case 47: /* swap screen */
1856 case 1047:
1857 if (!allowaltscreen)
1858 break;
1859 alt = IS_SET(MODE_ALTSCREEN);
1860 if(alt) {
1861 tclearregion(0, 0, term.col-1,
1862 term.row-1);
1863 }
1864 if(set ^ alt) /* set is always 1 or 0 */
1865 tswapscreen();
1866 if(*args != 1049)
1867 break;
1868 /* FALLTRU */
1869 case 1048:
1870 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1871 break;
1872 case 2004: /* 2004: bracketed paste mode */
1873 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1874 break;
1875 /* Not implemented mouse modes. See comments there. */
1876 case 1001: /* mouse highlight mode; can hang the
1877 terminal by design when implemented. */
1878 case 1005: /* UTF-8 mouse mode; will confuse
1879 applications not supporting UTF-8
1880 and luit. */
1881 case 1015: /* urxvt mangled mouse mode; incompatible
1882 and can be mistaken for other control
1883 codes. */
1884 default:
1885 fprintf(stderr,
1886 "erresc: unknown private set/reset mode %d\n",
1887 *args);
1888 break;
1889 }
1890 } else {
1891 switch(*args) {
1892 case 0: /* Error (IGNORED) */
1893 break;
1894 case 2: /* KAM -- keyboard action */
1895 MODBIT(term.mode, set, MODE_KBDLOCK);
1896 break;
1897 case 4: /* IRM -- Insertion-replacement */
1898 MODBIT(term.mode, set, MODE_INSERT);
1899 break;
1900 case 12: /* SRM -- Send/Receive */
1901 MODBIT(term.mode, !set, MODE_ECHO);
1902 break;
1903 case 20: /* LNM -- Linefeed/new line */
1904 MODBIT(term.mode, set, MODE_CRLF);
1905 break;
1906 default:
1907 fprintf(stderr,
1908 "erresc: unknown set/reset mode %d\n",
1909 *args);
1910 break;
1911 }
1912 }
1913 }
1914 }
1915
1916 void
1917 csihandle(void) {
1918 char buf[40];
1919 int len;
1920
1921 switch(csiescseq.mode) {
1922 default:
1923 unknown:
1924 fprintf(stderr, "erresc: unknown csi ");
1925 csidump();
1926 /* die(""); */
1927 break;
1928 case '@': /* ICH -- Insert <n> blank char */
1929 DEFAULT(csiescseq.arg[0], 1);
1930 tinsertblank(csiescseq.arg[0]);
1931 break;
1932 case 'A': /* CUU -- Cursor <n> Up */
1933 DEFAULT(csiescseq.arg[0], 1);
1934 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1935 break;
1936 case 'B': /* CUD -- Cursor <n> Down */
1937 case 'e': /* VPR --Cursor <n> Down */
1938 DEFAULT(csiescseq.arg[0], 1);
1939 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1940 break;
1941 case 'i': /* MC -- Media Copy */
1942 switch(csiescseq.arg[0]) {
1943 case 0:
1944 tdump();
1945 break;
1946 case 1:
1947 tdumpline(term.c.y);
1948 break;
1949 case 2:
1950 tdumpsel();
1951 break;
1952 case 4:
1953 term.mode &= ~MODE_PRINT;
1954 break;
1955 case 5:
1956 term.mode |= MODE_PRINT;
1957 break;
1958 }
1959 break;
1960 case 'c': /* DA -- Device Attributes */
1961 if(csiescseq.arg[0] == 0)
1962 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1963 break;
1964 case 'C': /* CUF -- Cursor <n> Forward */
1965 case 'a': /* HPR -- Cursor <n> Forward */
1966 DEFAULT(csiescseq.arg[0], 1);
1967 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1968 break;
1969 case 'D': /* CUB -- Cursor <n> Backward */
1970 DEFAULT(csiescseq.arg[0], 1);
1971 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1972 break;
1973 case 'E': /* CNL -- Cursor <n> Down and first col */
1974 DEFAULT(csiescseq.arg[0], 1);
1975 tmoveto(0, term.c.y+csiescseq.arg[0]);
1976 break;
1977 case 'F': /* CPL -- Cursor <n> Up and first col */
1978 DEFAULT(csiescseq.arg[0], 1);
1979 tmoveto(0, term.c.y-csiescseq.arg[0]);
1980 break;
1981 case 'g': /* TBC -- Tabulation clear */
1982 switch(csiescseq.arg[0]) {
1983 case 0: /* clear current tab stop */
1984 term.tabs[term.c.x] = 0;
1985 break;
1986 case 3: /* clear all the tabs */
1987 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1988 break;
1989 default:
1990 goto unknown;
1991 }
1992 break;
1993 case 'G': /* CHA -- Move to <col> */
1994 case '`': /* HPA */
1995 DEFAULT(csiescseq.arg[0], 1);
1996 tmoveto(csiescseq.arg[0]-1, term.c.y);
1997 break;
1998 case 'H': /* CUP -- Move to <row> <col> */
1999 case 'f': /* HVP */
2000 DEFAULT(csiescseq.arg[0], 1);
2001 DEFAULT(csiescseq.arg[1], 1);
2002 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2003 break;
2004 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2005 DEFAULT(csiescseq.arg[0], 1);
2006 while(csiescseq.arg[0]--)
2007 tputtab(1);
2008 break;
2009 case 'J': /* ED -- Clear screen */
2010 selclear(NULL);
2011 switch(csiescseq.arg[0]) {
2012 case 0: /* below */
2013 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2014 if(term.c.y < term.row-1) {
2015 tclearregion(0, term.c.y+1, term.col-1,
2016 term.row-1);
2017 }
2018 break;
2019 case 1: /* above */
2020 if(term.c.y > 1)
2021 tclearregion(0, 0, term.col-1, term.c.y-1);
2022 tclearregion(0, term.c.y, term.c.x, term.c.y);
2023 break;
2024 case 2: /* all */
2025 tclearregion(0, 0, term.col-1, term.row-1);
2026 break;
2027 default:
2028 goto unknown;
2029 }
2030 break;
2031 case 'K': /* EL -- Clear line */
2032 switch(csiescseq.arg[0]) {
2033 case 0: /* right */
2034 tclearregion(term.c.x, term.c.y, term.col-1,
2035 term.c.y);
2036 break;
2037 case 1: /* left */
2038 tclearregion(0, term.c.y, term.c.x, term.c.y);
2039 break;
2040 case 2: /* all */
2041 tclearregion(0, term.c.y, term.col-1, term.c.y);
2042 break;
2043 }
2044 break;
2045 case 'S': /* SU -- Scroll <n> line up */
2046 DEFAULT(csiescseq.arg[0], 1);
2047 tscrollup(term.top, csiescseq.arg[0]);
2048 break;
2049 case 'T': /* SD -- Scroll <n> line down */
2050 DEFAULT(csiescseq.arg[0], 1);
2051 tscrolldown(term.top, csiescseq.arg[0]);
2052 break;
2053 case 'L': /* IL -- Insert <n> blank lines */
2054 DEFAULT(csiescseq.arg[0], 1);
2055 tinsertblankline(csiescseq.arg[0]);
2056 break;
2057 case 'l': /* RM -- Reset Mode */
2058 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2059 break;
2060 case 'M': /* DL -- Delete <n> lines */
2061 DEFAULT(csiescseq.arg[0], 1);
2062 tdeleteline(csiescseq.arg[0]);
2063 break;
2064 case 'X': /* ECH -- Erase <n> char */
2065 DEFAULT(csiescseq.arg[0], 1);
2066 tclearregion(term.c.x, term.c.y,
2067 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2068 break;
2069 case 'P': /* DCH -- Delete <n> char */
2070 DEFAULT(csiescseq.arg[0], 1);
2071 tdeletechar(csiescseq.arg[0]);
2072 break;
2073 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2074 DEFAULT(csiescseq.arg[0], 1);
2075 while(csiescseq.arg[0]--)
2076 tputtab(0);
2077 break;
2078 case 'd': /* VPA -- Move to <row> */
2079 DEFAULT(csiescseq.arg[0], 1);
2080 tmoveato(term.c.x, csiescseq.arg[0]-1);
2081 break;
2082 case 'h': /* SM -- Set terminal mode */
2083 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2084 break;
2085 case 'm': /* SGR -- Terminal attribute (color) */
2086 tsetattr(csiescseq.arg, csiescseq.narg);
2087 break;
2088 case 'n': /* DSR – Device Status Report (cursor position) */
2089 if (csiescseq.arg[0] == 6) {
2090 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2091 term.c.y+1, term.c.x+1);
2092 ttywrite(buf, len);
2093 break;
2094 }
2095 case 'r': /* DECSTBM -- Set Scrolling Region */
2096 if(csiescseq.priv) {
2097 goto unknown;
2098 } else {
2099 DEFAULT(csiescseq.arg[0], 1);
2100 DEFAULT(csiescseq.arg[1], term.row);
2101 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2102 tmoveato(0, 0);
2103 }
2104 break;
2105 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2106 tcursor(CURSOR_SAVE);
2107 break;
2108 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2109 tcursor(CURSOR_LOAD);
2110 break;
2111 }
2112 }
2113
2114 void
2115 csidump(void) {
2116 int i;
2117 uint c;
2118
2119 printf("ESC[");
2120 for(i = 0; i < csiescseq.len; i++) {
2121 c = csiescseq.buf[i] & 0xff;
2122 if(isprint(c)) {
2123 putchar(c);
2124 } else if(c == '\n') {
2125 printf("(\\n)");
2126 } else if(c == '\r') {
2127 printf("(\\r)");
2128 } else if(c == 0x1b) {
2129 printf("(\\e)");
2130 } else {
2131 printf("(%02x)", c);
2132 }
2133 }
2134 putchar('\n');
2135 }
2136
2137 void
2138 csireset(void) {
2139 memset(&csiescseq, 0, sizeof(csiescseq));
2140 }
2141
2142 void
2143 strhandle(void) {
2144 char *p = NULL;
2145 int j, narg, par;
2146
2147 strparse();
2148 narg = strescseq.narg;
2149 par = atoi(strescseq.args[0]);
2150
2151 switch(strescseq.type) {
2152 case ']': /* OSC -- Operating System Command */
2153 switch(par) {
2154 case 0:
2155 case 1:
2156 case 2:
2157 if(narg > 1)
2158 xsettitle(strescseq.args[1]);
2159 return;
2160 case 4: /* color set */
2161 if(narg < 3)
2162 break;
2163 p = strescseq.args[2];
2164 /* fall through */
2165 case 104: /* color reset, here p = NULL */
2166 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2167 if (!xsetcolorname(j, p)) {
2168 fprintf(stderr, "erresc: invalid color %s\n", p);
2169 } else {
2170 /*
2171 * TODO if defaultbg color is changed, borders
2172 * are dirty
2173 */
2174 redraw(0);
2175 }
2176 return;
2177 }
2178 break;
2179 case 'k': /* old title set compatibility */
2180 xsettitle(strescseq.args[0]);
2181 return;
2182 case 'P': /* DSC -- Device Control String */
2183 case '_': /* APC -- Application Program Command */
2184 case '^': /* PM -- Privacy Message */
2185 return;
2186 }
2187
2188 fprintf(stderr, "erresc: unknown str ");
2189 strdump();
2190 }
2191
2192 void
2193 strparse(void) {
2194 char *p = strescseq.buf;
2195
2196 strescseq.narg = 0;
2197 strescseq.buf[strescseq.len] = '\0';
2198 while(p && strescseq.narg < STR_ARG_SIZ)
2199 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2200 }
2201
2202 void
2203 strdump(void) {
2204 int i;
2205 uint c;
2206
2207 printf("ESC%c", strescseq.type);
2208 for(i = 0; i < strescseq.len; i++) {
2209 c = strescseq.buf[i] & 0xff;
2210 if(c == '\0') {
2211 return;
2212 } else if(isprint(c)) {
2213 putchar(c);
2214 } else if(c == '\n') {
2215 printf("(\\n)");
2216 } else if(c == '\r') {
2217 printf("(\\r)");
2218 } else if(c == 0x1b) {
2219 printf("(\\e)");
2220 } else {
2221 printf("(%02x)", c);
2222 }
2223 }
2224 printf("ESC\\\n");
2225 }
2226
2227 void
2228 strreset(void) {
2229 memset(&strescseq, 0, sizeof(strescseq));
2230 }
2231
2232 void
2233 tprinter(char *s, size_t len) {
2234 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2235 fprintf(stderr, "Error writing in %s:%s\n",
2236 opt_io, strerror(errno));
2237 close(iofd);
2238 iofd = -1;
2239 }
2240 }
2241
2242 void
2243 toggleprinter(const Arg *arg) {
2244 term.mode ^= MODE_PRINT;
2245 }
2246
2247 void
2248 printscreen(const Arg *arg) {
2249 tdump();
2250 }
2251
2252 void
2253 printsel(const Arg *arg) {
2254 tdumpsel();
2255 }
2256
2257 void
2258 tdumpsel(void) {
2259 char *ptr;
2260
2261 if((ptr = getsel())) {
2262 tprinter(ptr, strlen(ptr));
2263 free(ptr);
2264 }
2265 }
2266
2267 void
2268 tdumpline(int n) {
2269 Glyph *bp, *end;
2270
2271 bp = &term.line[n][0];
2272 end = &bp[term.col-1];
2273 while(end > bp && !strcmp(" ", end->c))
2274 --end;
2275 if(bp != end || strcmp(bp->c, " ")) {
2276 for( ;bp <= end; ++bp)
2277 tprinter(bp->c, strlen(bp->c));
2278 }
2279 tprinter("\n", 1);
2280 }
2281
2282 void
2283 tdump(void) {
2284 int i;
2285
2286 for(i = 0; i < term.row; ++i)
2287 tdumpline(i);
2288 }
2289
2290 void
2291 tputtab(bool forward) {
2292 uint x = term.c.x;
2293
2294 if(forward) {
2295 if(x == term.col)
2296 return;
2297 for(++x; x < term.col && !term.tabs[x]; ++x)
2298 /* nothing */ ;
2299 } else {
2300 if(x == 0)
2301 return;
2302 for(--x; x > 0 && !term.tabs[x]; --x)
2303 /* nothing */ ;
2304 }
2305 tmoveto(x, term.c.y);
2306 }
2307
2308 void
2309 techo(char *buf, int len) {
2310 for(; len > 0; buf++, len--) {
2311 char c = *buf;
2312
2313 if(c < '\x20') { /* control code */
2314 if(c != '\n' && c != '\r' && c != '\t') {
2315 c |= '\x40';
2316 tputc("^", 1);
2317 }
2318 tputc(&c, 1);
2319 } else {
2320 break;
2321 }
2322 }
2323 if(len)
2324 tputc(buf, len);
2325 }
2326
2327 void
2328 tdeftran(char ascii) {
2329 char c, (*bp)[2];
2330 static char tbl[][2] = {
2331 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2332 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2333 {'5', CS_FIN}, {'C', CS_FIN},
2334 {0, 0}
2335 };
2336
2337 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2338 /* nothing */;
2339
2340 if (c == 0)
2341 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2342 else
2343 term.trantbl[term.icharset] = (*bp)[1];
2344 }
2345
2346 void
2347 tselcs(void) {
2348 MODBIT(term.c.attr.mode,
2349 term.trantbl[term.charset] == CS_GRAPHIC0,
2350 ATTR_GFX);
2351 }
2352
2353 void
2354 tputc(char *c, int len) {
2355 uchar ascii = *c;
2356 bool control = ascii < '\x20' || ascii == 0177;
2357 long unicodep;
2358 int width;
2359
2360 if(len == 1) {
2361 width = 1;
2362 } else {
2363 utf8decode(c, &unicodep, UTF_SIZ);
2364 width = wcwidth(unicodep);
2365 }
2366
2367 if(IS_SET(MODE_PRINT))
2368 tprinter(c, len);
2369
2370 /*
2371 * STR sequences must be checked before anything else
2372 * because it can use some control codes as part of the sequence.
2373 */
2374 if(term.esc & ESC_STR) {
2375 switch(ascii) {
2376 case '\033':
2377 term.esc = ESC_START | ESC_STR_END;
2378 break;
2379 case '\a': /* backwards compatibility to xterm */
2380 term.esc = 0;
2381 strhandle();
2382 break;
2383 default:
2384 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2385 memmove(&strescseq.buf[strescseq.len], c, len);
2386 strescseq.len += len;
2387 } else {
2388 /*
2389 * Here is a bug in terminals. If the user never sends
2390 * some code to stop the str or esc command, then st
2391 * will stop responding. But this is better than
2392 * silently failing with unknown characters. At least
2393 * then users will report back.
2394 *
2395 * In the case users ever get fixed, here is the code:
2396 */
2397 /*
2398 * term.esc = 0;
2399 * strhandle();
2400 */
2401 }
2402 }
2403 return;
2404 }
2405
2406 /*
2407 * Actions of control codes must be performed as soon they arrive
2408 * because they can be embedded inside a control sequence, and
2409 * they must not cause conflicts with sequences.
2410 */
2411 if(control) {
2412 switch(ascii) {
2413 case '\t': /* HT */
2414 tputtab(1);
2415 return;
2416 case '\b': /* BS */
2417 tmoveto(term.c.x-1, term.c.y);
2418 return;
2419 case '\r': /* CR */
2420 tmoveto(0, term.c.y);
2421 return;
2422 case '\f': /* LF */
2423 case '\v': /* VT */
2424 case '\n': /* LF */
2425 /* go to first col if the mode is set */
2426 tnewline(IS_SET(MODE_CRLF));
2427 return;
2428 case '\a': /* BEL */
2429 if(!(xw.state & WIN_FOCUSED))
2430 xseturgency(1);
2431 if (bellvolume)
2432 XBell(xw.dpy, bellvolume);
2433 return;
2434 case '\033': /* ESC */
2435 csireset();
2436 term.esc = ESC_START;
2437 return;
2438 case '\016': /* SO */
2439 term.charset = 0;
2440 tselcs();
2441 return;
2442 case '\017': /* SI */
2443 term.charset = 1;
2444 tselcs();
2445 return;
2446 case '\032': /* SUB */
2447 case '\030': /* CAN */
2448 csireset();
2449 return;
2450 case '\005': /* ENQ (IGNORED) */
2451 case '\000': /* NUL (IGNORED) */
2452 case '\021': /* XON (IGNORED) */
2453 case '\023': /* XOFF (IGNORED) */
2454 case 0177: /* DEL (IGNORED) */
2455 return;
2456 }
2457 } else if(term.esc & ESC_START) {
2458 if(term.esc & ESC_CSI) {
2459 csiescseq.buf[csiescseq.len++] = ascii;
2460 if(BETWEEN(ascii, 0x40, 0x7E)
2461 || csiescseq.len >= \
2462 sizeof(csiescseq.buf)-1) {
2463 term.esc = 0;
2464 csiparse();
2465 csihandle();
2466 }
2467 } else if(term.esc & ESC_STR_END) {
2468 term.esc = 0;
2469 if(ascii == '\\')
2470 strhandle();
2471 } else if(term.esc & ESC_ALTCHARSET) {
2472 tdeftran(ascii);
2473 tselcs();
2474 term.esc = 0;
2475 } else if(term.esc & ESC_TEST) {
2476 if(ascii == '8') { /* DEC screen alignment test. */
2477 char E[UTF_SIZ] = "E";
2478 int x, y;
2479
2480 for(x = 0; x < term.col; ++x) {
2481 for(y = 0; y < term.row; ++y)
2482 tsetchar(E, &term.c.attr, x, y);
2483 }
2484 }
2485 term.esc = 0;
2486 } else {
2487 switch(ascii) {
2488 case '[':
2489 term.esc |= ESC_CSI;
2490 break;
2491 case '#':
2492 term.esc |= ESC_TEST;
2493 break;
2494 case 'P': /* DCS -- Device Control String */
2495 case '_': /* APC -- Application Program Command */
2496 case '^': /* PM -- Privacy Message */
2497 case ']': /* OSC -- Operating System Command */
2498 case 'k': /* old title set compatibility */
2499 strreset();
2500 strescseq.type = ascii;
2501 term.esc |= ESC_STR;
2502 break;
2503 case '(': /* set primary charset G0 */
2504 case ')': /* set secondary charset G1 */
2505 case '*': /* set tertiary charset G2 */
2506 case '+': /* set quaternary charset G3 */
2507 term.icharset = ascii - '(';
2508 term.esc |= ESC_ALTCHARSET;
2509 break;
2510 case 'D': /* IND -- Linefeed */
2511 if(term.c.y == term.bot) {
2512 tscrollup(term.top, 1);
2513 } else {
2514 tmoveto(term.c.x, term.c.y+1);
2515 }
2516 term.esc = 0;
2517 break;
2518 case 'E': /* NEL -- Next line */
2519 tnewline(1); /* always go to first col */
2520 term.esc = 0;
2521 break;
2522 case 'H': /* HTS -- Horizontal tab stop */
2523 term.tabs[term.c.x] = 1;
2524 term.esc = 0;
2525 break;
2526 case 'M': /* RI -- Reverse index */
2527 if(term.c.y == term.top) {
2528 tscrolldown(term.top, 1);
2529 } else {
2530 tmoveto(term.c.x, term.c.y-1);
2531 }
2532 term.esc = 0;
2533 break;
2534 case 'Z': /* DECID -- Identify Terminal */
2535 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2536 term.esc = 0;
2537 break;
2538 case 'c': /* RIS -- Reset to inital state */
2539 treset();
2540 term.esc = 0;
2541 xresettitle();
2542 xloadcols();
2543 break;
2544 case '=': /* DECPAM -- Application keypad */
2545 term.mode |= MODE_APPKEYPAD;
2546 term.esc = 0;
2547 break;
2548 case '>': /* DECPNM -- Normal keypad */
2549 term.mode &= ~MODE_APPKEYPAD;
2550 term.esc = 0;
2551 break;
2552 case '7': /* DECSC -- Save Cursor */
2553 tcursor(CURSOR_SAVE);
2554 term.esc = 0;
2555 break;
2556 case '8': /* DECRC -- Restore Cursor */
2557 tcursor(CURSOR_LOAD);
2558 term.esc = 0;
2559 break;
2560 case '\\': /* ST -- Stop */
2561 term.esc = 0;
2562 break;
2563 default:
2564 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2565 (uchar) ascii, isprint(ascii)? ascii:'.');
2566 term.esc = 0;
2567 }
2568 }
2569 /*
2570 * All characters which form part of a sequence are not
2571 * printed
2572 */
2573 return;
2574 }
2575 /*
2576 * Display control codes only if we are in graphic mode
2577 */
2578 if(control && !(term.c.attr.mode & ATTR_GFX))
2579 return;
2580 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2581 selclear(NULL);
2582 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2583 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2584 tnewline(1);
2585 }
2586
2587 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2588 memmove(&term.line[term.c.y][term.c.x+1],
2589 &term.line[term.c.y][term.c.x],
2590 (term.col - term.c.x - 1) * sizeof(Glyph));
2591 }
2592
2593 if(term.c.x+width > term.col)
2594 tnewline(1);
2595
2596 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2597
2598 if(width == 2) {
2599 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2600 if(term.c.x+1 < term.col) {
2601 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2602 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2603 }
2604 }
2605 if(term.c.x+width < term.col) {
2606 tmoveto(term.c.x+width, term.c.y);
2607 } else {
2608 term.c.state |= CURSOR_WRAPNEXT;
2609 }
2610 }
2611
2612 int
2613 tresize(int col, int row) {
2614 int i;
2615 int minrow = MIN(row, term.row);
2616 int mincol = MIN(col, term.col);
2617 int slide = term.c.y - row + 1;
2618 bool *bp;
2619 Line *orig;
2620
2621 if(col < 1 || row < 1)
2622 return 0;
2623
2624 /* free unneeded rows */
2625 i = 0;
2626 if(slide > 0) {
2627 /*
2628 * slide screen to keep cursor where we expect it -
2629 * tscrollup would work here, but we can optimize to
2630 * memmove because we're freeing the earlier lines
2631 */
2632 for(/* i = 0 */; i < slide; i++) {
2633 free(term.line[i]);
2634 free(term.alt[i]);
2635 }
2636 memmove(term.line, term.line + slide, row * sizeof(Line));
2637 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2638 }
2639 for(i += row; i < term.row; i++) {
2640 free(term.line[i]);
2641 free(term.alt[i]);
2642 }
2643
2644 /* resize to new height */
2645 term.line = xrealloc(term.line, row * sizeof(Line));
2646 term.alt = xrealloc(term.alt, row * sizeof(Line));
2647 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2648 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2649
2650 /* resize each row to new width, zero-pad if needed */
2651 for(i = 0; i < minrow; i++) {
2652 term.dirty[i] = 1;
2653 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2654 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2655 }
2656
2657 /* allocate any new rows */
2658 for(/* i == minrow */; i < row; i++) {
2659 term.dirty[i] = 1;
2660 term.line[i] = xmalloc(col * sizeof(Glyph));
2661 term.alt[i] = xmalloc(col * sizeof(Glyph));
2662 }
2663 if(col > term.col) {
2664 bp = term.tabs + term.col;
2665
2666 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2667 while(--bp > term.tabs && !*bp)
2668 /* nothing */ ;
2669 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2670 *bp = 1;
2671 }
2672 /* update terminal size */
2673 term.col = col;
2674 term.row = row;
2675 /* reset scrolling region */
2676 tsetscroll(0, row-1);
2677 /* make use of the LIMIT in tmoveto */
2678 tmoveto(term.c.x, term.c.y);
2679 /* Clearing both screens */
2680 orig = term.line;
2681 do {
2682 if(mincol < col && 0 < minrow) {
2683 tclearregion(mincol, 0, col - 1, minrow - 1);
2684 }
2685 if(0 < col && minrow < row) {
2686 tclearregion(0, minrow, col - 1, row - 1);
2687 }
2688 tswapscreen();
2689 } while(orig != term.line);
2690
2691 return (slide > 0);
2692 }
2693
2694 void
2695 xresize(int col, int row) {
2696 xw.tw = MAX(1, col * xw.cw);
2697 xw.th = MAX(1, row * xw.ch);
2698
2699 XFreePixmap(xw.dpy, xw.buf);
2700 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2701 DefaultDepth(xw.dpy, xw.scr));
2702 XftDrawChange(xw.draw, xw.buf);
2703 xclear(0, 0, xw.w, xw.h);
2704 }
2705
2706 static inline ushort
2707 sixd_to_16bit(int x) {
2708 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2709 }
2710
2711 void
2712 xloadcols(void) {
2713 int i, r, g, b;
2714 XRenderColor color = { .alpha = 0xffff };
2715 static bool loaded;
2716 Colour *cp;
2717
2718 if(loaded) {
2719 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2720 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2721 }
2722
2723 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2724 for(i = 0; i < LEN(colorname); i++) {
2725 if(!colorname[i])
2726 continue;
2727 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2728 die("Could not allocate color '%s'\n", colorname[i]);
2729 }
2730 }
2731
2732 /* load colors [16-255] ; same colors as xterm */
2733 for(i = 16, r = 0; r < 6; r++) {
2734 for(g = 0; g < 6; g++) {
2735 for(b = 0; b < 6; b++) {
2736 color.red = sixd_to_16bit(r);
2737 color.green = sixd_to_16bit(g);
2738 color.blue = sixd_to_16bit(b);
2739 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2740 die("Could not allocate color %d\n", i);
2741 }
2742 i++;
2743 }
2744 }
2745 }
2746
2747 for(r = 0; r < 24; r++, i++) {
2748 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2749 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2750 &dc.col[i])) {
2751 die("Could not allocate color %d\n", i);
2752 }
2753 }
2754 loaded = true;
2755 }
2756
2757 int
2758 xsetcolorname(int x, const char *name) {
2759 XRenderColor color = { .alpha = 0xffff };
2760 Colour colour;
2761 if (x < 0 || x > LEN(colorname))
2762 return -1;
2763 if(!name) {
2764 if(16 <= x && x < 16 + 216) {
2765 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2766 color.red = sixd_to_16bit(r);
2767 color.green = sixd_to_16bit(g);
2768 color.blue = sixd_to_16bit(b);
2769 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2770 return 0; /* something went wrong */
2771 dc.col[x] = colour;
2772 return 1;
2773 } else if (16 + 216 <= x && x < 256) {
2774 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2775 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2776 return 0; /* something went wrong */
2777 dc.col[x] = colour;
2778 return 1;
2779 } else {
2780 name = colorname[x];
2781 }
2782 }
2783 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2784 return 0;
2785 dc.col[x] = colour;
2786 return 1;
2787 }
2788
2789 void
2790 xtermclear(int col1, int row1, int col2, int row2) {
2791 XftDrawRect(xw.draw,
2792 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2793 borderpx + col1 * xw.cw,
2794 borderpx + row1 * xw.ch,
2795 (col2-col1+1) * xw.cw,
2796 (row2-row1+1) * xw.ch);
2797 }
2798
2799 /*
2800 * Absolute coordinates.
2801 */
2802 void
2803 xclear(int x1, int y1, int x2, int y2) {
2804 XftDrawRect(xw.draw,
2805 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2806 x1, y1, x2-x1, y2-y1);
2807 }
2808
2809 void
2810 xhints(void) {
2811 XClassHint class = {opt_class ? opt_class : termname, termname};
2812 XWMHints wm = {.flags = InputHint, .input = 1};
2813 XSizeHints *sizeh = NULL;
2814
2815 sizeh = XAllocSizeHints();
2816 if(xw.isfixed == False) {
2817 sizeh->flags = PSize | PResizeInc | PBaseSize;
2818 sizeh->height = xw.h;
2819 sizeh->width = xw.w;
2820 sizeh->height_inc = xw.ch;
2821 sizeh->width_inc = xw.cw;
2822 sizeh->base_height = 2 * borderpx;
2823 sizeh->base_width = 2 * borderpx;
2824 } else {
2825 sizeh->flags = PMaxSize | PMinSize;
2826 sizeh->min_width = sizeh->max_width = xw.fw;
2827 sizeh->min_height = sizeh->max_height = xw.fh;
2828 }
2829
2830 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2831 &class);
2832 XFree(sizeh);
2833 }
2834
2835 int
2836 xloadfont(Font *f, FcPattern *pattern) {
2837 FcPattern *match;
2838 FcResult result;
2839
2840 match = FcFontMatch(NULL, pattern, &result);
2841 if(!match)
2842 return 1;
2843
2844 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2845 FcPatternDestroy(match);
2846 return 1;
2847 }
2848
2849 f->set = NULL;
2850 f->pattern = FcPatternDuplicate(pattern);
2851
2852 f->ascent = f->match->ascent;
2853 f->descent = f->match->descent;
2854 f->lbearing = 0;
2855 f->rbearing = f->match->max_advance_width;
2856
2857 f->height = f->ascent + f->descent;
2858 f->width = f->lbearing + f->rbearing;
2859
2860 return 0;
2861 }
2862
2863 void
2864 xloadfonts(char *fontstr, double fontsize) {
2865 FcPattern *pattern;
2866 FcResult r_sz, r_psz;
2867 double fontval;
2868
2869 if(fontstr[0] == '-') {
2870 pattern = XftXlfdParse(fontstr, False, False);
2871 } else {
2872 pattern = FcNameParse((FcChar8 *)fontstr);
2873 }
2874
2875 if(!pattern)
2876 die("st: can't open font %s\n", fontstr);
2877
2878 if(fontsize > 0) {
2879 FcPatternDel(pattern, FC_PIXEL_SIZE);
2880 FcPatternDel(pattern, FC_SIZE);
2881 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2882 usedfontsize = fontsize;
2883 } else {
2884 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2885 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2886 if(r_psz == FcResultMatch) {
2887 usedfontsize = fontval;
2888 } else if(r_sz == FcResultMatch) {
2889 usedfontsize = -1;
2890 } else {
2891 /*
2892 * Default font size is 12, if none given. This is to
2893 * have a known usedfontsize value.
2894 */
2895 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2896 usedfontsize = 12;
2897 }
2898 }
2899
2900 FcConfigSubstitute(0, pattern, FcMatchPattern);
2901 FcDefaultSubstitute(pattern);
2902
2903 if(xloadfont(&dc.font, pattern))
2904 die("st: can't open font %s\n", fontstr);
2905
2906 if(usedfontsize < 0) {
2907 FcPatternGetDouble(dc.font.match->pattern,
2908 FC_PIXEL_SIZE, 0, &fontval);
2909 usedfontsize = fontval;
2910 }
2911
2912 /* Setting character width and height. */
2913 xw.cw = CEIL(dc.font.width * cwscale);
2914 xw.ch = CEIL(dc.font.height * chscale);
2915
2916 FcPatternDel(pattern, FC_SLANT);
2917 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2918 if(xloadfont(&dc.ifont, pattern))
2919 die("st: can't open font %s\n", fontstr);
2920
2921 FcPatternDel(pattern, FC_WEIGHT);
2922 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2923 if(xloadfont(&dc.ibfont, pattern))
2924 die("st: can't open font %s\n", fontstr);
2925
2926 FcPatternDel(pattern, FC_SLANT);
2927 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2928 if(xloadfont(&dc.bfont, pattern))
2929 die("st: can't open font %s\n", fontstr);
2930
2931 FcPatternDestroy(pattern);
2932 }
2933
2934 int
2935 xloadfontset(Font *f) {
2936 FcResult result;
2937
2938 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2939 return 1;
2940 return 0;
2941 }
2942
2943 void
2944 xunloadfont(Font *f) {
2945 XftFontClose(xw.dpy, f->match);
2946 FcPatternDestroy(f->pattern);
2947 if(f->set)
2948 FcFontSetDestroy(f->set);
2949 }
2950
2951 void
2952 xunloadfonts(void) {
2953 int i;
2954
2955 /* Free the loaded fonts in the font cache. */
2956 for(i = 0; i < frclen; i++) {
2957 XftFontClose(xw.dpy, frc[i].font);
2958 }
2959 frclen = 0;
2960
2961 xunloadfont(&dc.font);
2962 xunloadfont(&dc.bfont);
2963 xunloadfont(&dc.ifont);
2964 xunloadfont(&dc.ibfont);
2965 }
2966
2967 void
2968 xzoom(const Arg *arg) {
2969 xunloadfonts();
2970 xloadfonts(usedfont, usedfontsize + arg->i);
2971 cresize(0, 0);
2972 redraw(0);
2973 }
2974
2975 void
2976 xinit(void) {
2977 XGCValues gcvalues;
2978 Cursor cursor;
2979 Window parent;
2980 int sw, sh;
2981 pid_t thispid = getpid();
2982
2983 if(!(xw.dpy = XOpenDisplay(NULL)))
2984 die("Can't open display\n");
2985 xw.scr = XDefaultScreen(xw.dpy);
2986 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2987
2988 /* font */
2989 if(!FcInit())
2990 die("Could not init fontconfig.\n");
2991
2992 usedfont = (opt_font == NULL)? font : opt_font;
2993 xloadfonts(usedfont, 0);
2994
2995 /* colors */
2996 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2997 xloadcols();
2998
2999 /* adjust fixed window geometry */
3000 if(xw.isfixed) {
3001 sw = DisplayWidth(xw.dpy, xw.scr);
3002 sh = DisplayHeight(xw.dpy, xw.scr);
3003 if(xw.fx < 0)
3004 xw.fx = sw + xw.fx - xw.fw - 1;
3005 if(xw.fy < 0)
3006 xw.fy = sh + xw.fy - xw.fh - 1;
3007
3008 xw.h = xw.fh;
3009 xw.w = xw.fw;
3010 } else {
3011 /* window - default size */
3012 xw.h = 2 * borderpx + term.row * xw.ch;
3013 xw.w = 2 * borderpx + term.col * xw.cw;
3014 xw.fx = 0;
3015 xw.fy = 0;
3016 }
3017
3018 /* Events */
3019 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3020 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3021 xw.attrs.bit_gravity = NorthWestGravity;
3022 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3023 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3024 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3025 xw.attrs.colormap = xw.cmap;
3026
3027 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3028 XRootWindow(xw.dpy, xw.scr);
3029 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
3030 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3031 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3032 | CWEventMask | CWColormap, &xw.attrs);
3033
3034 memset(&gcvalues, 0, sizeof(gcvalues));
3035 gcvalues.graphics_exposures = False;
3036 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3037 &gcvalues);
3038 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3039 DefaultDepth(xw.dpy, xw.scr));
3040 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3041 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3042
3043 /* Xft rendering context */
3044 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3045
3046 /* input methods */
3047 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3048 XSetLocaleModifiers("@im=local");
3049 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3050 XSetLocaleModifiers("@im=");
3051 if((xw.xim = XOpenIM(xw.dpy,
3052 NULL, NULL, NULL)) == NULL) {
3053 die("XOpenIM failed. Could not open input"
3054 " device.\n");
3055 }
3056 }
3057 }
3058 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3059 | XIMStatusNothing, XNClientWindow, xw.win,
3060 XNFocusWindow, xw.win, NULL);
3061 if(xw.xic == NULL)
3062 die("XCreateIC failed. Could not obtain input method.\n");
3063
3064 /* white cursor, black outline */
3065 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3066 XDefineCursor(xw.dpy, xw.win, cursor);
3067 XRecolorCursor(xw.dpy, cursor,
3068 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3069 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3070
3071 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3072 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3073 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3074 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3075
3076 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3077 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3078 PropModeReplace, (uchar *)&thispid, 1);
3079
3080 xresettitle();
3081 XMapWindow(xw.dpy, xw.win);
3082 xhints();
3083 XSync(xw.dpy, False);
3084 }
3085
3086 void
3087 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3088 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3089 width = charlen * xw.cw, xp, i;
3090 int frcflags;
3091 int u8fl, u8fblen, u8cblen, doesexist;
3092 char *u8c, *u8fs;
3093 long unicodep;
3094 Font *font = &dc.font;
3095 FcResult fcres;
3096 FcPattern *fcpattern, *fontpattern;
3097 FcFontSet *fcsets[] = { NULL };
3098 FcCharSet *fccharset;
3099 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3100 XRenderColor colfg, colbg;
3101 XRectangle r;
3102 int oneatatime;
3103
3104 frcflags = FRC_NORMAL;
3105
3106 if(base.mode & ATTR_ITALIC) {
3107 if(base.fg == defaultfg)
3108 base.fg = defaultitalic;
3109 font = &dc.ifont;
3110 frcflags = FRC_ITALIC;
3111 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3112 if(base.fg == defaultfg)
3113 base.fg = defaultitalic;
3114 font = &dc.ibfont;
3115 frcflags = FRC_ITALICBOLD;
3116 } else if(base.mode & ATTR_UNDERLINE) {
3117 if(base.fg == defaultfg)
3118 base.fg = defaultunderline;
3119 }
3120
3121 if(IS_TRUECOL(base.fg)) {
3122 colfg.alpha = 0xffff;
3123 colfg.red = TRUERED(base.fg);
3124 colfg.green = TRUEGREEN(base.fg);
3125 colfg.blue = TRUEBLUE(base.fg);
3126 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3127 fg = &truefg;
3128 } else {
3129 fg = &dc.col[base.fg];
3130 }
3131
3132 if(IS_TRUECOL(base.bg)) {
3133 colbg.alpha = 0xffff;
3134 colbg.green = TRUEGREEN(base.bg);
3135 colbg.red = TRUERED(base.bg);
3136 colbg.blue = TRUEBLUE(base.bg);
3137 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3138 bg = &truebg;
3139 } else {
3140 bg = &dc.col[base.bg];
3141 }
3142
3143 if(base.mode & ATTR_BOLD) {
3144 if(BETWEEN(base.fg, 0, 7)) {
3145 /* basic system colors */
3146 fg = &dc.col[base.fg + 8];
3147 } else if(BETWEEN(base.fg, 16, 195)) {
3148 /* 256 colors */
3149 fg = &dc.col[base.fg + 36];
3150 } else if(BETWEEN(base.fg, 232, 251)) {
3151 /* greyscale */
3152 fg = &dc.col[base.fg + 4];
3153 }
3154 /*
3155 * Those ranges will not be brightened:
3156 * 8 - 15 – bright system colors
3157 * 196 - 231 – highest 256 color cube
3158 * 252 - 255 – brightest colors in greyscale
3159 */
3160 font = &dc.bfont;
3161 frcflags = FRC_BOLD;
3162 }
3163
3164 if(IS_SET(MODE_REVERSE)) {
3165 if(fg == &dc.col[defaultfg]) {
3166 fg = &dc.col[defaultbg];
3167 } else {
3168 colfg.red = ~fg->color.red;
3169 colfg.green = ~fg->color.green;
3170 colfg.blue = ~fg->color.blue;
3171 colfg.alpha = fg->color.alpha;
3172 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3173 &revfg);
3174 fg = &revfg;
3175 }
3176
3177 if(bg == &dc.col[defaultbg]) {
3178 bg = &dc.col[defaultfg];
3179 } else {
3180 colbg.red = ~bg->color.red;
3181 colbg.green = ~bg->color.green;
3182 colbg.blue = ~bg->color.blue;
3183 colbg.alpha = bg->color.alpha;
3184 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3185 &revbg);
3186 bg = &revbg;
3187 }
3188 }
3189
3190 if(base.mode & ATTR_REVERSE) {
3191 temp = fg;
3192 fg = bg;
3193 bg = temp;
3194 }
3195
3196 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3197 fg = bg;
3198
3199 /* Intelligent cleaning up of the borders. */
3200 if(x == 0) {
3201 xclear(0, (y == 0)? 0 : winy, borderpx,
3202 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3203 }
3204 if(x + charlen >= term.col) {
3205 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3206 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3207 }
3208 if(y == 0)
3209 xclear(winx, 0, winx + width, borderpx);
3210 if(y == term.row-1)
3211 xclear(winx, winy + xw.ch, winx + width, xw.h);
3212
3213 /* Clean up the region we want to draw to. */
3214 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3215
3216 /* Set the clip region because Xft is sometimes dirty. */
3217 r.x = 0;
3218 r.y = 0;
3219 r.height = xw.ch;
3220 r.width = width;
3221 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3222
3223 for(xp = winx; bytelen > 0;) {
3224 /*
3225 * Search for the range in the to be printed string of glyphs
3226 * that are in the main font. Then print that range. If
3227 * some glyph is found that is not in the font, do the
3228 * fallback dance.
3229 */
3230 u8fs = s;
3231 u8fblen = 0;
3232 u8fl = 0;
3233 oneatatime = font->width != xw.cw;
3234 for(;;) {
3235 u8c = s;
3236 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3237 s += u8cblen;
3238 bytelen -= u8cblen;
3239
3240 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3241 if(oneatatime || !doesexist || bytelen <= 0) {
3242 if(oneatatime || bytelen <= 0) {
3243 if(doesexist) {
3244 u8fl++;
3245 u8fblen += u8cblen;
3246 }
3247 }
3248
3249 if(u8fl > 0) {
3250 XftDrawStringUtf8(xw.draw, fg,
3251 font->match, xp,
3252 winy + font->ascent,
3253 (FcChar8 *)u8fs,
3254 u8fblen);
3255 xp += xw.cw * u8fl;
3256
3257 }
3258 break;
3259 }
3260
3261 u8fl++;
3262 u8fblen += u8cblen;
3263 }
3264 if(doesexist) {
3265 if(oneatatime)
3266 continue;
3267 break;
3268 }
3269
3270 /* Search the font cache. */
3271 for(i = 0; i < frclen; i++) {
3272 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3273 && frc[i].flags == frcflags) {
3274 break;
3275 }
3276 }
3277
3278 /* Nothing was found. */
3279 if(i >= frclen) {
3280 if(!font->set)
3281 xloadfontset(font);
3282 fcsets[0] = font->set;
3283
3284 /*
3285 * Nothing was found in the cache. Now use
3286 * some dozen of Fontconfig calls to get the
3287 * font for one single character.
3288 *
3289 * Xft and fontconfig are design failures.
3290 */
3291 fcpattern = FcPatternDuplicate(font->pattern);
3292 fccharset = FcCharSetCreate();
3293
3294 FcCharSetAddChar(fccharset, unicodep);
3295 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3296 fccharset);
3297 FcPatternAddBool(fcpattern, FC_SCALABLE,
3298 FcTrue);
3299
3300 FcConfigSubstitute(0, fcpattern,
3301 FcMatchPattern);
3302 FcDefaultSubstitute(fcpattern);
3303
3304 fontpattern = FcFontSetMatch(0, fcsets,
3305 FcTrue, fcpattern, &fcres);
3306
3307 /*
3308 * Overwrite or create the new cache entry.
3309 */
3310 if(frclen >= LEN(frc)) {
3311 frclen = LEN(frc) - 1;
3312 XftFontClose(xw.dpy, frc[frclen].font);
3313 }
3314
3315 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3316 fontpattern);
3317 frc[frclen].flags = frcflags;
3318
3319 i = frclen;
3320 frclen++;
3321
3322 FcPatternDestroy(fcpattern);
3323 FcCharSetDestroy(fccharset);
3324 }
3325
3326 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3327 xp, winy + frc[i].font->ascent,
3328 (FcChar8 *)u8c, u8cblen);
3329
3330 xp += xw.cw * wcwidth(unicodep);
3331 }
3332
3333 /*
3334 * This is how the loop above actually should be. Why does the
3335 * application have to care about font details?
3336 *
3337 * I have to repeat: Xft and Fontconfig are design failures.
3338 */
3339 /*
3340 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3341 winy + font->ascent, (FcChar8 *)s, bytelen);
3342 */
3343
3344 if(base.mode & ATTR_UNDERLINE) {
3345 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3346 width, 1);
3347 }
3348
3349 /* Reset clip to none. */
3350 XftDrawSetClip(xw.draw, 0);
3351 }
3352
3353 void
3354 xdrawcursor(void) {
3355 static int oldx = 0, oldy = 0;
3356 int sl, width, curx;
3357 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3358
3359 LIMIT(oldx, 0, term.col-1);
3360 LIMIT(oldy, 0, term.row-1);
3361
3362 curx = term.c.x;
3363
3364 /* adjust position if in dummy */
3365 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3366 oldx--;
3367 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3368 curx--;
3369
3370 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3371
3372 /* remove the old cursor */
3373 sl = utf8len(term.line[oldy][oldx].c);
3374 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3375 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3376 oldy, width, sl);
3377
3378 /* draw the new one */
3379 if(!(IS_SET(MODE_HIDE))) {
3380 if(xw.state & WIN_FOCUSED) {
3381 if(IS_SET(MODE_REVERSE)) {
3382 g.mode |= ATTR_REVERSE;
3383 g.fg = defaultcs;
3384 g.bg = defaultfg;
3385 }
3386
3387 sl = utf8len(g.c);
3388 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3389 ? 2 : 1;
3390 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3391 } else {
3392 XftDrawRect(xw.draw, &dc.col[defaultcs],
3393 borderpx + curx * xw.cw,
3394 borderpx + term.c.y * xw.ch,
3395 xw.cw - 1, 1);
3396 XftDrawRect(xw.draw, &dc.col[defaultcs],
3397 borderpx + curx * xw.cw,
3398 borderpx + term.c.y * xw.ch,
3399 1, xw.ch - 1);
3400 XftDrawRect(xw.draw, &dc.col[defaultcs],
3401 borderpx + (curx + 1) * xw.cw - 1,
3402 borderpx + term.c.y * xw.ch,
3403 1, xw.ch - 1);
3404 XftDrawRect(xw.draw, &dc.col[defaultcs],
3405 borderpx + curx * xw.cw,
3406 borderpx + (term.c.y + 1) * xw.ch - 1,
3407 xw.cw, 1);
3408 }
3409 oldx = curx, oldy = term.c.y;
3410 }
3411 }
3412
3413
3414 void
3415 xsettitle(char *p) {
3416 XTextProperty prop;
3417
3418 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3419 &prop);
3420 XSetWMName(xw.dpy, xw.win, &prop);
3421 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3422 XFree(prop.value);
3423 }
3424
3425 void
3426 xresettitle(void) {
3427 xsettitle(opt_title ? opt_title : "st");
3428 }
3429
3430 void
3431 redraw(int timeout) {
3432 struct timespec tv = {0, timeout * 1000};
3433
3434 draw();
3435
3436 if(timeout > 0) {
3437 nanosleep(&tv, NULL);
3438 XSync(xw.dpy, False); /* necessary for a good tput flash */
3439 }
3440 }
3441
3442 void
3443 draw(void) {
3444 drawregion(0, 0, term.col, term.row);
3445 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3446 xw.h, 0, 0);
3447 XSetForeground(xw.dpy, dc.gc,
3448 dc.col[IS_SET(MODE_REVERSE)?
3449 defaultfg : defaultbg].pixel);
3450 }
3451
3452 void
3453 drawregion(int x1, int y1, int x2, int y2) {
3454 int ic, ib, x, y, ox, sl;
3455 Glyph base, new;
3456 char buf[DRAW_BUF_SIZ];
3457 bool ena_sel = sel.ob.x != -1;
3458 long unicodep;
3459
3460 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3461 ena_sel = 0;
3462
3463 if(!(xw.state & WIN_VISIBLE))
3464 return;
3465
3466 for(y = y1; y < y2; y++) {
3467 if(!term.dirty[y])
3468 continue;
3469
3470 xtermclear(0, y, term.col, y);
3471 term.dirty[y] = 0;
3472 base = term.line[y][0];
3473 ic = ib = ox = 0;
3474 for(x = x1; x < x2; x++) {
3475 new = term.line[y][x];
3476 if(new.mode == ATTR_WDUMMY)
3477 continue;
3478 if(ena_sel && selected(x, y))
3479 new.mode ^= ATTR_REVERSE;
3480 if(ib > 0 && (ATTRCMP(base, new)
3481 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3482 xdraws(buf, base, ox, y, ic, ib);
3483 ic = ib = 0;
3484 }
3485 if(ib == 0) {
3486 ox = x;
3487 base = new;
3488 }
3489
3490 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3491 memcpy(buf+ib, new.c, sl);
3492 ib += sl;
3493 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3494 }
3495 if(ib > 0)
3496 xdraws(buf, base, ox, y, ic, ib);
3497 }
3498 xdrawcursor();
3499 }
3500
3501 void
3502 expose(XEvent *ev) {
3503 XExposeEvent *e = &ev->xexpose;
3504
3505 if(xw.state & WIN_REDRAW) {
3506 if(!e->count)
3507 xw.state &= ~WIN_REDRAW;
3508 }
3509 redraw(0);
3510 }
3511
3512 void
3513 visibility(XEvent *ev) {
3514 XVisibilityEvent *e = &ev->xvisibility;
3515
3516 if(e->state == VisibilityFullyObscured) {
3517 xw.state &= ~WIN_VISIBLE;
3518 } else if(!(xw.state & WIN_VISIBLE)) {
3519 /* need a full redraw for next Expose, not just a buf copy */
3520 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3521 }
3522 }
3523
3524 void
3525 unmap(XEvent *ev) {
3526 xw.state &= ~WIN_VISIBLE;
3527 }
3528
3529 void
3530 xsetpointermotion(int set) {
3531 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3532 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3533 }
3534
3535 void
3536 xseturgency(int add) {
3537 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3538
3539 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3540 XSetWMHints(xw.dpy, xw.win, h);
3541 XFree(h);
3542 }
3543
3544 void
3545 focus(XEvent *ev) {
3546 XFocusChangeEvent *e = &ev->xfocus;
3547
3548 if(e->mode == NotifyGrab)
3549 return;
3550
3551 if(ev->type == FocusIn) {
3552 XSetICFocus(xw.xic);
3553 xw.state |= WIN_FOCUSED;
3554 xseturgency(0);
3555 if(IS_SET(MODE_FOCUS))
3556 ttywrite("\033[I", 3);
3557 } else {
3558 XUnsetICFocus(xw.xic);
3559 xw.state &= ~WIN_FOCUSED;
3560 if(IS_SET(MODE_FOCUS))
3561 ttywrite("\033[O", 3);
3562 }
3563 }
3564
3565 static inline bool
3566 match(uint mask, uint state) {
3567 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3568 }
3569
3570 void
3571 numlock(const Arg *dummy) {
3572 term.numlock ^= 1;
3573 }
3574
3575 char*
3576 kmap(KeySym k, uint state) {
3577 Key *kp;
3578 int i;
3579
3580 /* Check for mapped keys out of X11 function keys. */
3581 for(i = 0; i < LEN(mappedkeys); i++) {
3582 if(mappedkeys[i] == k)
3583 break;
3584 }
3585 if(i == LEN(mappedkeys)) {
3586 if((k & 0xFFFF) < 0xFD00)
3587 return NULL;
3588 }
3589
3590 for(kp = key; kp < key + LEN(key); kp++) {
3591 if(kp->k != k)
3592 continue;
3593
3594 if(!match(kp->mask, state))
3595 continue;
3596
3597 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3598 continue;
3599 if(term.numlock && kp->appkey == 2)
3600 continue;
3601
3602 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3603 continue;
3604
3605 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3606 continue;
3607
3608 return kp->s;
3609 }
3610
3611 return NULL;
3612 }
3613
3614 void
3615 kpress(XEvent *ev) {
3616 XKeyEvent *e = &ev->xkey;
3617 KeySym ksym;
3618 char buf[32], *customkey;
3619 int len;
3620 long c;
3621 Status status;
3622 Shortcut *bp;
3623
3624 if(IS_SET(MODE_KBDLOCK))
3625 return;
3626
3627 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3628 /* 1. shortcuts */
3629 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3630 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3631 bp->func(&(bp->arg));
3632 return;
3633 }
3634 }
3635
3636 /* 2. custom keys from config.h */
3637 if((customkey = kmap(ksym, e->state))) {
3638 ttysend(customkey, strlen(customkey));
3639 return;
3640 }
3641
3642 /* 3. composed string from input method */
3643 if(len == 0)
3644 return;
3645 if(len == 1 && e->state & Mod1Mask) {
3646 if(IS_SET(MODE_8BIT)) {
3647 if(*buf < 0177) {
3648 c = *buf | 0x80;
3649 len = utf8encode(c, buf, UTF_SIZ);
3650 }
3651 } else {
3652 buf[1] = buf[0];
3653 buf[0] = '\033';
3654 len = 2;
3655 }
3656 }
3657 ttysend(buf, len);
3658 }
3659
3660
3661 void
3662 cmessage(XEvent *e) {
3663 /*
3664 * See xembed specs
3665 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3666 */
3667 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3668 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3669 xw.state |= WIN_FOCUSED;
3670 xseturgency(0);
3671 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3672 xw.state &= ~WIN_FOCUSED;
3673 }
3674 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3675 /* Send SIGHUP to shell */
3676 kill(pid, SIGHUP);
3677 exit(EXIT_SUCCESS);
3678 }
3679 }
3680
3681 void
3682 cresize(int width, int height) {
3683 int col, row;
3684
3685 if(width != 0)
3686 xw.w = width;
3687 if(height != 0)
3688 xw.h = height;
3689
3690 col = (xw.w - 2 * borderpx) / xw.cw;
3691 row = (xw.h - 2 * borderpx) / xw.ch;
3692
3693 tresize(col, row);
3694 xresize(col, row);
3695 ttyresize();
3696 }
3697
3698 void
3699 resize(XEvent *e) {
3700 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3701 return;
3702
3703 cresize(e->xconfigure.width, e->xconfigure.height);
3704 }
3705
3706 void
3707 run(void) {
3708 XEvent ev;
3709 int w = xw.w, h = xw.h;
3710 fd_set rfd;
3711 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3712 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3713
3714 /* Waiting for window mapping */
3715 while(1) {
3716 XNextEvent(xw.dpy, &ev);
3717 if(ev.type == ConfigureNotify) {
3718 w = ev.xconfigure.width;
3719 h = ev.xconfigure.height;
3720 } else if(ev.type == MapNotify) {
3721 break;
3722 }
3723 }
3724
3725 ttynew();
3726 if(!xw.isfixed)
3727 cresize(w, h);
3728 else
3729 cresize(xw.fw, xw.fh);
3730
3731 gettimeofday(&last, NULL);
3732 lastblink = last;
3733
3734 for(xev = actionfps;;) {
3735 long deltatime;
3736
3737 FD_ZERO(&rfd);
3738 FD_SET(cmdfd, &rfd);
3739 FD_SET(xfd, &rfd);
3740
3741 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3742 if(errno == EINTR)
3743 continue;
3744 die("select failed: %s\n", strerror(errno));
3745 }
3746 if(FD_ISSET(cmdfd, &rfd)) {
3747 ttyread();
3748 if(blinktimeout) {
3749 blinkset = tattrset(ATTR_BLINK);
3750 if(!blinkset)
3751 MODBIT(term.mode, 0, MODE_BLINK);
3752 }
3753 }
3754
3755 if(FD_ISSET(xfd, &rfd))
3756 xev = actionfps;
3757
3758 gettimeofday(&now, NULL);
3759 drawtimeout.tv_sec = 0;
3760 drawtimeout.tv_usec = (1000/xfps) * 1000;
3761 tv = &drawtimeout;
3762
3763 dodraw = 0;
3764 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3765 tsetdirtattr(ATTR_BLINK);
3766 term.mode ^= MODE_BLINK;
3767 lastblink = now;
3768 dodraw = 1;
3769 }
3770 deltatime = TIMEDIFF(now, last);
3771 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3772 || deltatime < 0) {
3773 dodraw = 1;
3774 last = now;
3775 }
3776
3777 if(dodraw) {
3778 while(XPending(xw.dpy)) {
3779 XNextEvent(xw.dpy, &ev);
3780 if(XFilterEvent(&ev, None))
3781 continue;
3782 if(handler[ev.type])
3783 (handler[ev.type])(&ev);
3784 }
3785
3786 draw();
3787 XFlush(xw.dpy);
3788
3789 if(xev && !FD_ISSET(xfd, &rfd))
3790 xev--;
3791 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3792 if(blinkset) {
3793 if(TIMEDIFF(now, lastblink) \
3794 > blinktimeout) {
3795 drawtimeout.tv_usec = 1;
3796 } else {
3797 drawtimeout.tv_usec = (1000 * \
3798 (blinktimeout - \
3799 TIMEDIFF(now,
3800 lastblink)));
3801 }
3802 } else {
3803 tv = NULL;
3804 }
3805 }
3806 }
3807 }
3808 }
3809
3810 void
3811 usage(void) {
3812 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3813 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3814 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3815 }
3816
3817 int
3818 main(int argc, char *argv[]) {
3819 int bitm, xr, yr;
3820 uint wr, hr;
3821 char *titles;
3822
3823 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3824 xw.isfixed = False;
3825
3826 ARGBEGIN {
3827 case 'a':
3828 allowaltscreen = false;
3829 break;
3830 case 'c':
3831 opt_class = EARGF(usage());
3832 break;
3833 case 'e':
3834 /* eat all remaining arguments */
3835 if(argc > 1) {
3836 opt_cmd = &argv[1];
3837 if(argv[1] != NULL && opt_title == NULL) {
3838 titles = xstrdup(argv[1]);
3839 opt_title = basename(titles);
3840 }
3841 }
3842 goto run;
3843 case 'f':
3844 opt_font = EARGF(usage());
3845 break;
3846 case 'g':
3847 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3848 if(bitm & XValue)
3849 xw.fx = xr;
3850 if(bitm & YValue)
3851 xw.fy = yr;
3852 if(bitm & WidthValue)
3853 xw.fw = (int)wr;
3854 if(bitm & HeightValue)
3855 xw.fh = (int)hr;
3856 if(bitm & XNegative && xw.fx == 0)
3857 xw.fx = -1;
3858 if(bitm & YNegative && xw.fy == 0)
3859 xw.fy = -1;
3860
3861 if(xw.fh != 0 && xw.fw != 0)
3862 xw.isfixed = True;
3863 break;
3864 case 'o':
3865 opt_io = EARGF(usage());
3866 break;
3867 case 't':
3868 opt_title = EARGF(usage());
3869 break;
3870 case 'w':
3871 opt_embed = EARGF(usage());
3872 break;
3873 case 'v':
3874 default:
3875 usage();
3876 } ARGEND;
3877
3878 run:
3879 setlocale(LC_CTYPE, "");
3880 XSetLocaleModifiers("");
3881 tnew(80, 24);
3882 xinit();
3883 selinit();
3884 run();
3885
3886 return 0;
3887 }
3888