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