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[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a)[0])
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
74 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
75 #define IS_SET(flag) ((term.mode & (flag)) != 0)
76 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
77 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
78 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
79
80 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
81 #define IS_TRUECOL(x) (1 << 24 & (x))
82 #define TRUERED(x) (((x) & 0xff0000) >> 8)
83 #define TRUEGREEN(x) (((x) & 0xff00))
84 #define TRUEBLUE(x) (((x) & 0xff) << 8)
85
86
87 #define VT102ID "\033[?6c"
88
89 enum glyph_attribute {
90 ATTR_NULL = 0,
91 ATTR_REVERSE = 1,
92 ATTR_UNDERLINE = 2,
93 ATTR_BOLD = 4,
94 ATTR_GFX = 8,
95 ATTR_ITALIC = 16,
96 ATTR_BLINK = 32,
97 ATTR_WRAP = 64,
98 ATTR_WIDE = 128,
99 ATTR_WDUMMY = 256,
100 };
101
102 enum cursor_movement {
103 CURSOR_SAVE,
104 CURSOR_LOAD
105 };
106
107 enum cursor_state {
108 CURSOR_DEFAULT = 0,
109 CURSOR_WRAPNEXT = 1,
110 CURSOR_ORIGIN = 2
111 };
112
113 enum term_mode {
114 MODE_WRAP = 1,
115 MODE_INSERT = 2,
116 MODE_APPKEYPAD = 4,
117 MODE_ALTSCREEN = 8,
118 MODE_CRLF = 16,
119 MODE_MOUSEBTN = 32,
120 MODE_MOUSEMOTION = 64,
121 MODE_REVERSE = 128,
122 MODE_KBDLOCK = 256,
123 MODE_HIDE = 512,
124 MODE_ECHO = 1024,
125 MODE_APPCURSOR = 2048,
126 MODE_MOUSESGR = 4096,
127 MODE_8BIT = 8192,
128 MODE_BLINK = 16384,
129 MODE_FBLINK = 32768,
130 MODE_FOCUS = 65536,
131 MODE_MOUSEX10 = 131072,
132 MODE_MOUSEMANY = 262144,
133 MODE_BRCKTPASTE = 524288,
134 MODE_PRINT = 1048576,
135 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
136 |MODE_MOUSEMANY,
137 };
138
139 enum charset {
140 CS_GRAPHIC0,
141 CS_GRAPHIC1,
142 CS_UK,
143 CS_USA,
144 CS_MULTI,
145 CS_GER,
146 CS_FIN
147 };
148
149 enum escape_state {
150 ESC_START = 1,
151 ESC_CSI = 2,
152 ESC_STR = 4, /* DSC, OSC, PM, APC */
153 ESC_ALTCHARSET = 8,
154 ESC_STR_END = 16, /* a final string was encountered */
155 ESC_TEST = 32, /* Enter in test mode */
156 };
157
158 enum window_state {
159 WIN_VISIBLE = 1,
160 WIN_REDRAW = 2,
161 WIN_FOCUSED = 4
162 };
163
164 enum selection_type {
165 SEL_REGULAR = 1,
166 SEL_RECTANGULAR = 2
167 };
168
169 enum selection_snap {
170 SNAP_WORD = 1,
171 SNAP_LINE = 2
172 };
173
174 typedef unsigned char uchar;
175 typedef unsigned int uint;
176 typedef unsigned long ulong;
177 typedef unsigned short ushort;
178
179 typedef XftDraw *Draw;
180 typedef XftColor Colour;
181 typedef Colormap Colourmap;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode;
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colourmap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int fx, fy, fw, fh; /* fixed geometry */
254 int tw, th; /* tty width and height */
255 int w, h; /* window width and height */
256 int ch; /* char height */
257 int cw; /* char width */
258 char state; /* focus, redraw, visible */
259 } XWindow;
260
261 typedef struct {
262 uint b;
263 uint mask;
264 char *s;
265 } Mousekey;
266
267 typedef struct {
268 KeySym k;
269 uint mask;
270 char *s;
271 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
272 signed char appkey; /* application keypad */
273 signed char appcursor; /* application cursor */
274 signed char crlf; /* crlf mode */
275 } Key;
276
277 typedef struct {
278 int mode;
279 int type;
280 int snap;
281 /*
282 * Selection variables:
283 * nb – normalized coordinates of the beginning of the selection
284 * ne – normalized coordinates of the end of the selection
285 * ob – original coordinates of the beginning of the selection
286 * oe – original coordinates of the end of the selection
287 */
288 struct {
289 int x, y;
290 } nb, ne, ob, oe;
291
292 char *clip;
293 Atom xtarget;
294 bool alt;
295 struct timeval tclick1;
296 struct timeval tclick2;
297 } Selection;
298
299 typedef union {
300 int i;
301 unsigned int ui;
302 float f;
303 const void *v;
304 } Arg;
305
306 typedef struct {
307 unsigned int 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 *s, size_t len);
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 x, int y);
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 *f);
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 *s);
457
458 static void (*handler[LASTEvent])(XEvent *) = {
459 [KeyPress] = kpress,
460 [ClientMessage] = cmessage,
461 [ConfigureNotify] = resize,
462 [VisibilityNotify] = visibility,
463 [UnmapNotify] = unmap,
464 [Expose] = expose,
465 [FocusIn] = focus,
466 [FocusOut] = focus,
467 [MotionNotify] = bmotion,
468 [ButtonPress] = bpress,
469 [ButtonRelease] = brelease,
470 [SelectionClear] = selclear,
471 [SelectionNotify] = selnotify,
472 [SelectionRequest] = selrequest,
473 };
474
475 /* Globals */
476 static DC dc;
477 static XWindow xw;
478 static Term term;
479 static CSIEscape csiescseq;
480 static STREscape strescseq;
481 static int cmdfd;
482 static pid_t pid;
483 static Selection sel;
484 static int iofd = STDOUT_FILENO;
485 static char **opt_cmd = NULL;
486 static char *opt_io = NULL;
487 static char *opt_title = NULL;
488 static char *opt_embed = NULL;
489 static char *opt_class = NULL;
490 static char *opt_font = NULL;
491 static int oldbutton = 3; /* button event on startup: 3 = release */
492
493 static char *usedfont = NULL;
494 static double usedfontsize = 0;
495
496 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
497 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
498 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
499 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
500
501 /* Font Ring Cache */
502 enum {
503 FRC_NORMAL,
504 FRC_ITALIC,
505 FRC_BOLD,
506 FRC_ITALICBOLD
507 };
508
509 typedef struct {
510 XftFont *font;
511 int flags;
512 } Fontcache;
513
514 /* Fontcache is an array now. A new font will be appended to the array. */
515 static Fontcache frc[16];
516 static int frclen = 0;
517
518 ssize_t
519 xwrite(int fd, char *s, size_t len) {
520 size_t aux = len;
521
522 while(len > 0) {
523 ssize_t r = write(fd, s, len);
524 if(r < 0)
525 return r;
526 len -= r;
527 s += r;
528 }
529 return aux;
530 }
531
532 void *
533 xmalloc(size_t len) {
534 void *p = malloc(len);
535
536 if(!p)
537 die("Out of memory\n");
538
539 return p;
540 }
541
542 void *
543 xrealloc(void *p, size_t len) {
544 if((p = realloc(p, len)) == NULL)
545 die("Out of memory\n");
546
547 return p;
548 }
549
550 char *
551 xstrdup(char *s) {
552 char *p = strdup(s);
553
554 if (!p)
555 die("Out of memory\n");
556
557 return p;
558 }
559
560 size_t
561 utf8decode(char *c, long *u, size_t clen) {
562 size_t i, j, len, type;
563 long udecoded;
564
565 *u = UTF_INVALID;
566 if(!clen)
567 return 0;
568 udecoded = utf8decodebyte(c[0], &len);
569 if(!BETWEEN(len, 1, UTF_SIZ))
570 return 1;
571 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
572 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
573 if(type != 0)
574 return j;
575 }
576 if(j < len)
577 return 0;
578 *u = udecoded;
579 utf8validate(u, len);
580 return len;
581 }
582
583 long
584 utf8decodebyte(char c, size_t *i) {
585 for(*i = 0; *i < LEN(utfmask); ++(*i))
586 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
587 return (uchar)c & ~utfmask[*i];
588 return 0;
589 }
590
591 size_t
592 utf8encode(long u, char *c, size_t clen) {
593 size_t len, i;
594
595 len = utf8validate(&u, 0);
596 if(clen < len)
597 return 0;
598 for(i = len - 1; i != 0; --i) {
599 c[i] = utf8encodebyte(u, 0);
600 u >>= 6;
601 }
602 c[0] = utf8encodebyte(u, len);
603 return len;
604 }
605
606 char
607 utf8encodebyte(long u, size_t i) {
608 return utfbyte[i] | (u & ~utfmask[i]);
609 }
610
611 size_t
612 utf8len(char *c) {
613 return utf8decode(c, &(long){0}, UTF_SIZ);
614 }
615
616 size_t
617 utf8validate(long *u, size_t i) {
618 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
619 *u = UTF_INVALID;
620 for(i = 1; *u > utfmax[i]; ++i)
621 ;
622 return i;
623 }
624
625 static void
626 selinit(void) {
627 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
628 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
629 sel.mode = 0;
630 sel.ob.x = -1;
631 sel.clip = NULL;
632 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
633 if(sel.xtarget == None)
634 sel.xtarget = XA_STRING;
635 }
636
637 static int
638 x2col(int x) {
639 x -= borderpx;
640 x /= xw.cw;
641
642 return LIMIT(x, 0, term.col-1);
643 }
644
645 static int
646 y2row(int y) {
647 y -= borderpx;
648 y /= xw.ch;
649
650 return LIMIT(y, 0, term.row-1);
651 }
652
653 static void
654 selsort(void) {
655 if(sel.ob.y == sel.oe.y) {
656 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
657 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
658 } else {
659 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
660 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
661 }
662 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
663 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
664 }
665
666 static inline bool
667 selected(int x, int y) {
668 if(sel.ne.y == y && sel.nb.y == y)
669 return BETWEEN(x, sel.nb.x, sel.ne.x);
670
671 if(sel.type == SEL_RECTANGULAR) {
672 return ((sel.nb.y <= y && y <= sel.ne.y)
673 && (sel.nb.x <= x && x <= sel.ne.x));
674 }
675
676 return ((sel.nb.y < y && y < sel.ne.y)
677 || (y == sel.ne.y && x <= sel.ne.x))
678 || (y == sel.nb.y && x >= sel.nb.x
679 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
680 }
681
682 void
683 selsnap(int mode, int *x, int *y, int direction) {
684 int i;
685
686 switch(mode) {
687 case SNAP_WORD:
688 /*
689 * Snap around if the word wraps around at the end or
690 * beginning of a line.
691 */
692 for(;;) {
693 if(direction < 0 && *x <= 0) {
694 if(*y > 0 && term.line[*y - 1][term.col-1].mode
695 & ATTR_WRAP) {
696 *y -= 1;
697 *x = term.col-1;
698 } else {
699 break;
700 }
701 }
702 if(direction > 0 && *x >= term.col-1) {
703 if(*y < term.row-1 && term.line[*y][*x].mode
704 & ATTR_WRAP) {
705 *y += 1;
706 *x = 0;
707 } else {
708 break;
709 }
710 }
711
712 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
713 *x += direction;
714 continue;
715 }
716
717 if(strchr(worddelimiters,
718 term.line[*y][*x+direction].c[0])) {
719 break;
720 }
721
722 *x += direction;
723 }
724 break;
725 case SNAP_LINE:
726 /*
727 * Snap around if the the previous line or the current one
728 * has set ATTR_WRAP at its end. Then the whole next or
729 * previous line will be selected.
730 */
731 *x = (direction < 0) ? 0 : term.col - 1;
732 if(direction < 0 && *y > 0) {
733 for(; *y > 0; *y += direction) {
734 if(!(term.line[*y-1][term.col-1].mode
735 & ATTR_WRAP)) {
736 break;
737 }
738 }
739 } else if(direction > 0 && *y < term.row-1) {
740 for(; *y < term.row; *y += direction) {
741 if(!(term.line[*y][term.col-1].mode
742 & ATTR_WRAP)) {
743 break;
744 }
745 }
746 }
747 break;
748 default:
749 /*
750 * Select the whole line when the end of line is reached.
751 */
752 if(direction > 0) {
753 i = term.col;
754 while(--i > 0 && term.line[*y][i].c[0] == ' ')
755 /* nothing */;
756 if(i > 0 && i < *x)
757 *x = term.col - 1;
758 }
759 break;
760 }
761 }
762
763 void
764 getbuttoninfo(XEvent *e) {
765 int type;
766 uint state = e->xbutton.state &~Button1Mask;
767
768 sel.alt = IS_SET(MODE_ALTSCREEN);
769
770 sel.oe.x = x2col(e->xbutton.x);
771 sel.oe.y = y2row(e->xbutton.y);
772
773 if(sel.ob.y < sel.oe.y
774 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
775 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
776 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
777 } else {
778 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
779 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
780 }
781 selsort();
782
783 sel.type = SEL_REGULAR;
784 for(type = 1; type < LEN(selmasks); ++type) {
785 if(match(selmasks[type], state)) {
786 sel.type = type;
787 break;
788 }
789 }
790 }
791
792 void
793 mousereport(XEvent *e) {
794 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
795 button = e->xbutton.button, state = e->xbutton.state,
796 len;
797 char buf[40];
798 static int ox, oy;
799
800 /* from urxvt */
801 if(e->xbutton.type == MotionNotify) {
802 if(x == ox && y == oy)
803 return;
804 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
805 return;
806 /* MOUSE_MOTION: no reporting if no button is pressed */
807 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
808 return;
809
810 button = oldbutton + 32;
811 ox = x;
812 oy = y;
813 } else {
814 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
815 button = 3;
816 } else {
817 button -= Button1;
818 if(button >= 3)
819 button += 64 - 3;
820 }
821 if(e->xbutton.type == ButtonPress) {
822 oldbutton = button;
823 ox = x;
824 oy = y;
825 } else if(e->xbutton.type == ButtonRelease) {
826 oldbutton = 3;
827 /* MODE_MOUSEX10: no button release reporting */
828 if(IS_SET(MODE_MOUSEX10))
829 return;
830 }
831 }
832
833 if(!IS_SET(MODE_MOUSEX10)) {
834 button += (state & ShiftMask ? 4 : 0)
835 + (state & Mod4Mask ? 8 : 0)
836 + (state & ControlMask ? 16 : 0);
837 }
838
839 len = 0;
840 if(IS_SET(MODE_MOUSESGR)) {
841 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
842 button, x+1, y+1,
843 e->xbutton.type == ButtonRelease ? 'm' : 'M');
844 } else if(x < 223 && y < 223) {
845 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
846 32+button, 32+x+1, 32+y+1);
847 } else {
848 return;
849 }
850
851 ttywrite(buf, len);
852 }
853
854 void
855 bpress(XEvent *e) {
856 struct timeval now;
857 Mousekey *mk;
858
859 if(IS_SET(MODE_MOUSE)) {
860 mousereport(e);
861 return;
862 }
863
864 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
865 if(e->xbutton.button == mk->b
866 && match(mk->mask, e->xbutton.state)) {
867 ttysend(mk->s, strlen(mk->s));
868 return;
869 }
870 }
871
872 if(e->xbutton.button == Button1) {
873 gettimeofday(&now, NULL);
874
875 /* Clear previous selection, logically and visually. */
876 selclear(NULL);
877 sel.mode = 1;
878 sel.type = SEL_REGULAR;
879 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
880 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
881
882 /*
883 * If the user clicks below predefined timeouts specific
884 * snapping behaviour is exposed.
885 */
886 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
887 sel.snap = SNAP_LINE;
888 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
889 sel.snap = SNAP_WORD;
890 } else {
891 sel.snap = 0;
892 }
893 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
894 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
895 selsort();
896
897 /*
898 * Draw selection, unless it's regular and we don't want to
899 * make clicks visible
900 */
901 if(sel.snap != 0) {
902 sel.mode++;
903 tsetdirt(sel.nb.y, sel.ne.y);
904 }
905 sel.tclick2 = sel.tclick1;
906 sel.tclick1 = now;
907 }
908 }
909
910 char *
911 getsel(void) {
912 char *str, *ptr;
913 int x, y, bufsize, size, i, ex;
914 Glyph *gp, *last;
915
916 if(sel.ob.x == -1) {
917 str = NULL;
918 } else {
919 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
920 ptr = str = xmalloc(bufsize);
921
922 /* append every set & selected glyph to the selection */
923 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
924 gp = &term.line[y][0];
925 last = &gp[term.col-1];
926
927 while(last >= gp && !(selected(last - gp, y) &&
928 strcmp(last->c, " ") != 0)) {
929 --last;
930 }
931
932 for(x = 0; gp <= last; x++, ++gp) {
933 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
934 continue;
935
936 size = utf8len(gp->c);
937 memcpy(ptr, gp->c, size);
938 ptr += size;
939 }
940
941 /*
942 * Copy and pasting of line endings is inconsistent
943 * in the inconsistent terminal and GUI world.
944 * The best solution seems like to produce '\n' when
945 * something is copied from st and convert '\n' to
946 * '\r', when something to be pasted is received by
947 * st.
948 * FIXME: Fix the computer world.
949 */
950 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
951 *ptr++ = '\n';
952
953 /*
954 * If the last selected line expands in the selection
955 * after the visible text '\n' is appended.
956 */
957 if(y == sel.ne.y) {
958 i = term.col;
959 while(--i > 0 && term.line[y][i].c[0] == ' ')
960 /* nothing */;
961 ex = sel.ne.x;
962 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
963 ex = sel.nb.x;
964 if(i < ex)
965 *ptr++ = '\n';
966 }
967 }
968 *ptr = 0;
969 }
970 return str;
971 }
972
973 void
974 selcopy(void) {
975 xsetsel(getsel());
976 }
977
978 void
979 selnotify(XEvent *e) {
980 ulong nitems, ofs, rem;
981 int format;
982 uchar *data, *last, *repl;
983 Atom type;
984
985 ofs = 0;
986 do {
987 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
988 False, AnyPropertyType, &type, &format,
989 &nitems, &rem, &data)) {
990 fprintf(stderr, "Clipboard allocation failed\n");
991 return;
992 }
993
994 /*
995 * As seen in selcopy:
996 * Line endings are inconsistent in the terminal and GUI world
997 * copy and pasting. When receiving some selection data,
998 * replace all '\n' with '\r'.
999 * FIXME: Fix the computer world.
1000 */
1001 repl = data;
1002 last = data + nitems * format / 8;
1003 while((repl = memchr(repl, '\n', last - repl))) {
1004 *repl++ = '\r';
1005 }
1006
1007 if(IS_SET(MODE_BRCKTPASTE))
1008 ttywrite("\033[200~", 6);
1009 ttysend((char *)data, nitems * format / 8);
1010 if(IS_SET(MODE_BRCKTPASTE))
1011 ttywrite("\033[201~", 6);
1012 XFree(data);
1013 /* number of 32-bit chunks returned */
1014 ofs += nitems * format / 32;
1015 } while(rem > 0);
1016 }
1017
1018 void
1019 selpaste(const Arg *dummy) {
1020 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1021 xw.win, CurrentTime);
1022 }
1023
1024 void
1025 clippaste(const Arg *dummy) {
1026 Atom clipboard;
1027
1028 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1029 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1030 xw.win, CurrentTime);
1031 }
1032
1033 void
1034 selclear(XEvent *e) {
1035 if(sel.ob.x == -1)
1036 return;
1037 sel.ob.x = -1;
1038 tsetdirt(sel.nb.y, sel.ne.y);
1039 }
1040
1041 void
1042 selrequest(XEvent *e) {
1043 XSelectionRequestEvent *xsre;
1044 XSelectionEvent xev;
1045 Atom xa_targets, string;
1046
1047 xsre = (XSelectionRequestEvent *) e;
1048 xev.type = SelectionNotify;
1049 xev.requestor = xsre->requestor;
1050 xev.selection = xsre->selection;
1051 xev.target = xsre->target;
1052 xev.time = xsre->time;
1053 /* reject */
1054 xev.property = None;
1055
1056 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1057 if(xsre->target == xa_targets) {
1058 /* respond with the supported type */
1059 string = sel.xtarget;
1060 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1061 XA_ATOM, 32, PropModeReplace,
1062 (uchar *) &string, 1);
1063 xev.property = xsre->property;
1064 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1065 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1066 xsre->target, 8, PropModeReplace,
1067 (uchar *) sel.clip, strlen(sel.clip));
1068 xev.property = xsre->property;
1069 }
1070
1071 /* all done, send a notification to the listener */
1072 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1073 fprintf(stderr, "Error sending SelectionNotify event\n");
1074 }
1075
1076 void
1077 xsetsel(char *str) {
1078 /* register the selection for both the clipboard and the primary */
1079 Atom clipboard;
1080
1081 free(sel.clip);
1082 sel.clip = str;
1083
1084 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1085
1086 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1087 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1088 }
1089
1090 void
1091 brelease(XEvent *e) {
1092 if(IS_SET(MODE_MOUSE)) {
1093 mousereport(e);
1094 return;
1095 }
1096
1097 if(e->xbutton.button == Button2) {
1098 selpaste(NULL);
1099 } else if(e->xbutton.button == Button1) {
1100 if(sel.mode < 2) {
1101 selclear(NULL);
1102 } else {
1103 getbuttoninfo(e);
1104 selcopy();
1105 }
1106 sel.mode = 0;
1107 tsetdirt(sel.nb.y, sel.ne.y);
1108 }
1109 }
1110
1111 void
1112 bmotion(XEvent *e) {
1113 int oldey, oldex, oldsby, oldsey;
1114
1115 if(IS_SET(MODE_MOUSE)) {
1116 mousereport(e);
1117 return;
1118 }
1119
1120 if(!sel.mode)
1121 return;
1122
1123 sel.mode++;
1124 oldey = sel.oe.y;
1125 oldex = sel.oe.x;
1126 oldsby = sel.nb.y;
1127 oldsey = sel.ne.y;
1128 getbuttoninfo(e);
1129
1130 if(oldey != sel.oe.y || oldex != sel.oe.x)
1131 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1132 }
1133
1134 void
1135 die(const char *errstr, ...) {
1136 va_list ap;
1137
1138 va_start(ap, errstr);
1139 vfprintf(stderr, errstr, ap);
1140 va_end(ap);
1141 exit(EXIT_FAILURE);
1142 }
1143
1144 void
1145 execsh(void) {
1146 char **args;
1147 char *envshell = getenv("SHELL");
1148 const struct passwd *pass = getpwuid(getuid());
1149 char buf[sizeof(long) * 8 + 1];
1150
1151 unsetenv("COLUMNS");
1152 unsetenv("LINES");
1153 unsetenv("TERMCAP");
1154
1155 if(pass) {
1156 setenv("LOGNAME", pass->pw_name, 1);
1157 setenv("USER", pass->pw_name, 1);
1158 setenv("SHELL", pass->pw_shell, 0);
1159 setenv("HOME", pass->pw_dir, 0);
1160 }
1161
1162 snprintf(buf, sizeof(buf), "%lu", xw.win);
1163 setenv("WINDOWID", buf, 1);
1164
1165 signal(SIGCHLD, SIG_DFL);
1166 signal(SIGHUP, SIG_DFL);
1167 signal(SIGINT, SIG_DFL);
1168 signal(SIGQUIT, SIG_DFL);
1169 signal(SIGTERM, SIG_DFL);
1170 signal(SIGALRM, SIG_DFL);
1171
1172 DEFAULT(envshell, shell);
1173 setenv("TERM", termname, 1);
1174 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1175 execvp(args[0], args);
1176 exit(EXIT_FAILURE);
1177 }
1178
1179 void
1180 sigchld(int a) {
1181 int stat = 0;
1182
1183 if(waitpid(pid, &stat, 0) < 0)
1184 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1185
1186 if(WIFEXITED(stat)) {
1187 exit(WEXITSTATUS(stat));
1188 } else {
1189 exit(EXIT_FAILURE);
1190 }
1191 }
1192
1193 void
1194 ttynew(void) {
1195 int m, s;
1196 struct winsize w = {term.row, term.col, 0, 0};
1197
1198 /* seems to work fine on linux, openbsd and freebsd */
1199 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1200 die("openpty failed: %s\n", strerror(errno));
1201
1202 switch(pid = fork()) {
1203 case -1:
1204 die("fork failed\n");
1205 break;
1206 case 0:
1207 setsid(); /* create a new process group */
1208 dup2(s, STDIN_FILENO);
1209 dup2(s, STDOUT_FILENO);
1210 dup2(s, STDERR_FILENO);
1211 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1212 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1213 close(s);
1214 close(m);
1215 execsh();
1216 break;
1217 default:
1218 close(s);
1219 cmdfd = m;
1220 signal(SIGCHLD, sigchld);
1221 if(opt_io) {
1222 term.mode |= MODE_PRINT;
1223 iofd = (!strcmp(opt_io, "-")) ?
1224 STDOUT_FILENO :
1225 open(opt_io, O_WRONLY | O_CREAT, 0666);
1226 if(iofd < 0) {
1227 fprintf(stderr, "Error opening %s:%s\n",
1228 opt_io, strerror(errno));
1229 }
1230 }
1231 }
1232 }
1233
1234 void
1235 dump(char c) {
1236 static int col;
1237
1238 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1239 if(++col % 10 == 0)
1240 fprintf(stderr, "\n");
1241 }
1242
1243 void
1244 ttyread(void) {
1245 static char buf[BUFSIZ];
1246 static int buflen = 0;
1247 char *ptr;
1248 char s[UTF_SIZ];
1249 int charsize; /* size of utf8 char in bytes */
1250 long unicodep;
1251 int ret;
1252
1253 /* append read bytes to unprocessed bytes */
1254 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1255 die("Couldn't read from shell: %s\n", strerror(errno));
1256
1257 /* process every complete utf8 char */
1258 buflen += ret;
1259 ptr = buf;
1260 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1261 utf8encode(unicodep, s, UTF_SIZ);
1262 tputc(s, charsize);
1263 ptr += charsize;
1264 buflen -= charsize;
1265 }
1266
1267 /* keep any uncomplete utf8 char for the next call */
1268 memmove(buf, ptr, buflen);
1269 }
1270
1271 void
1272 ttywrite(const char *s, size_t n) {
1273 if(write(cmdfd, s, n) == -1)
1274 die("write error on tty: %s\n", strerror(errno));
1275 }
1276
1277 void
1278 ttysend(char *s, size_t n) {
1279 ttywrite(s, n);
1280 if(IS_SET(MODE_ECHO))
1281 techo(s, n);
1282 }
1283
1284 void
1285 ttyresize(void) {
1286 struct winsize w;
1287
1288 w.ws_row = term.row;
1289 w.ws_col = term.col;
1290 w.ws_xpixel = xw.tw;
1291 w.ws_ypixel = xw.th;
1292 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1293 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1294 }
1295
1296 int
1297 tattrset(int attr) {
1298 int i, j;
1299
1300 for(i = 0; i < term.row-1; i++) {
1301 for(j = 0; j < term.col-1; j++) {
1302 if(term.line[i][j].mode & attr)
1303 return 1;
1304 }
1305 }
1306
1307 return 0;
1308 }
1309
1310 void
1311 tsetdirt(int top, int bot) {
1312 int i;
1313
1314 LIMIT(top, 0, term.row-1);
1315 LIMIT(bot, 0, term.row-1);
1316
1317 for(i = top; i <= bot; i++)
1318 term.dirty[i] = 1;
1319 }
1320
1321 void
1322 tsetdirtattr(int attr) {
1323 int i, j;
1324
1325 for(i = 0; i < term.row-1; i++) {
1326 for(j = 0; j < term.col-1; j++) {
1327 if(term.line[i][j].mode & attr) {
1328 tsetdirt(i, i);
1329 break;
1330 }
1331 }
1332 }
1333 }
1334
1335 void
1336 tfulldirt(void) {
1337 tsetdirt(0, term.row-1);
1338 }
1339
1340 void
1341 tcursor(int mode) {
1342 static TCursor c[2];
1343 bool alt = IS_SET(MODE_ALTSCREEN);
1344
1345 if(mode == CURSOR_SAVE) {
1346 c[alt] = term.c;
1347 } else if(mode == CURSOR_LOAD) {
1348 term.c = c[alt];
1349 tmoveto(c[alt].x, c[alt].y);
1350 }
1351 }
1352
1353 void
1354 treset(void) {
1355 uint i;
1356
1357 term.c = (TCursor){{
1358 .mode = ATTR_NULL,
1359 .fg = defaultfg,
1360 .bg = defaultbg
1361 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1362
1363 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1364 for(i = tabspaces; i < term.col; i += tabspaces)
1365 term.tabs[i] = 1;
1366 term.top = 0;
1367 term.bot = term.row - 1;
1368 term.mode = MODE_WRAP;
1369 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1370 term.charset = 0;
1371
1372 tclearregion(0, 0, term.col-1, term.row-1);
1373 tmoveto(0, 0);
1374 tcursor(CURSOR_SAVE);
1375 }
1376
1377 void
1378 tnew(int col, int row) {
1379 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1380 tresize(col, row);
1381 term.numlock = 1;
1382
1383 treset();
1384 }
1385
1386 void
1387 tswapscreen(void) {
1388 Line *tmp = term.line;
1389
1390 term.line = term.alt;
1391 term.alt = tmp;
1392 term.mode ^= MODE_ALTSCREEN;
1393 tfulldirt();
1394 }
1395
1396 void
1397 tscrolldown(int orig, int n) {
1398 int i;
1399 Line temp;
1400
1401 LIMIT(n, 0, term.bot-orig+1);
1402
1403 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1404
1405 for(i = term.bot; i >= orig+n; i--) {
1406 temp = term.line[i];
1407 term.line[i] = term.line[i-n];
1408 term.line[i-n] = temp;
1409
1410 term.dirty[i] = 1;
1411 term.dirty[i-n] = 1;
1412 }
1413
1414 selscroll(orig, n);
1415 }
1416
1417 void
1418 tscrollup(int orig, int n) {
1419 int i;
1420 Line temp;
1421 LIMIT(n, 0, term.bot-orig+1);
1422
1423 tclearregion(0, orig, term.col-1, orig+n-1);
1424
1425 for(i = orig; i <= term.bot-n; i++) {
1426 temp = term.line[i];
1427 term.line[i] = term.line[i+n];
1428 term.line[i+n] = temp;
1429
1430 term.dirty[i] = 1;
1431 term.dirty[i+n] = 1;
1432 }
1433
1434 selscroll(orig, -n);
1435 }
1436
1437 void
1438 selscroll(int orig, int n) {
1439 if(sel.ob.x == -1)
1440 return;
1441
1442 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1443 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1444 selclear(NULL);
1445 return;
1446 }
1447 if(sel.type == SEL_RECTANGULAR) {
1448 if(sel.ob.y < term.top)
1449 sel.ob.y = term.top;
1450 if(sel.oe.y > term.bot)
1451 sel.oe.y = term.bot;
1452 } else {
1453 if(sel.ob.y < term.top) {
1454 sel.ob.y = term.top;
1455 sel.ob.x = 0;
1456 }
1457 if(sel.oe.y > term.bot) {
1458 sel.oe.y = term.bot;
1459 sel.oe.x = term.col;
1460 }
1461 }
1462 selsort();
1463 }
1464 }
1465
1466 void
1467 tnewline(int first_col) {
1468 int y = term.c.y;
1469
1470 if(y == term.bot) {
1471 tscrollup(term.top, 1);
1472 } else {
1473 y++;
1474 }
1475 tmoveto(first_col ? 0 : term.c.x, y);
1476 }
1477
1478 void
1479 csiparse(void) {
1480 char *p = csiescseq.buf, *np;
1481 long int v;
1482
1483 csiescseq.narg = 0;
1484 if(*p == '?') {
1485 csiescseq.priv = 1;
1486 p++;
1487 }
1488
1489 csiescseq.buf[csiescseq.len] = '\0';
1490 while(p < csiescseq.buf+csiescseq.len) {
1491 np = NULL;
1492 v = strtol(p, &np, 10);
1493 if(np == p)
1494 v = 0;
1495 if(v == LONG_MAX || v == LONG_MIN)
1496 v = -1;
1497 csiescseq.arg[csiescseq.narg++] = v;
1498 p = np;
1499 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1500 break;
1501 p++;
1502 }
1503 csiescseq.mode = *p;
1504 }
1505
1506 /* for absolute user moves, when decom is set */
1507 void
1508 tmoveato(int x, int y) {
1509 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1510 }
1511
1512 void
1513 tmoveto(int x, int y) {
1514 int miny, maxy;
1515
1516 if(term.c.state & CURSOR_ORIGIN) {
1517 miny = term.top;
1518 maxy = term.bot;
1519 } else {
1520 miny = 0;
1521 maxy = term.row - 1;
1522 }
1523 LIMIT(x, 0, term.col-1);
1524 LIMIT(y, miny, maxy);
1525 term.c.state &= ~CURSOR_WRAPNEXT;
1526 term.c.x = x;
1527 term.c.y = y;
1528 }
1529
1530 void
1531 tsetchar(char *c, Glyph *attr, int x, int y) {
1532 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1533 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1534 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1535 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1536 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1537 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1538 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1539 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1540 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1541 };
1542
1543 /*
1544 * The table is proudly stolen from rxvt.
1545 */
1546 if(attr->mode & ATTR_GFX) {
1547 if(c[0] >= 0x41 && c[0] <= 0x7e
1548 && vt100_0[c[0] - 0x41]) {
1549 c = vt100_0[c[0] - 0x41];
1550 }
1551 }
1552
1553 if(term.line[y][x].mode & ATTR_WIDE) {
1554 if(x+1 < term.col) {
1555 term.line[y][x+1].c[0] = ' ';
1556 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1557 }
1558 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1559 term.line[y][x-1].c[0] = ' ';
1560 term.line[y][x-1].mode &= ~ATTR_WIDE;
1561 }
1562
1563 term.dirty[y] = 1;
1564 term.line[y][x] = *attr;
1565 memcpy(term.line[y][x].c, c, UTF_SIZ);
1566 }
1567
1568 void
1569 tclearregion(int x1, int y1, int x2, int y2) {
1570 int x, y, temp;
1571
1572 if(x1 > x2)
1573 temp = x1, x1 = x2, x2 = temp;
1574 if(y1 > y2)
1575 temp = y1, y1 = y2, y2 = temp;
1576
1577 LIMIT(x1, 0, term.col-1);
1578 LIMIT(x2, 0, term.col-1);
1579 LIMIT(y1, 0, term.row-1);
1580 LIMIT(y2, 0, term.row-1);
1581
1582 for(y = y1; y <= y2; y++) {
1583 term.dirty[y] = 1;
1584 for(x = x1; x <= x2; x++) {
1585 if(selected(x, y))
1586 selclear(NULL);
1587 term.line[y][x] = term.c.attr;
1588 memcpy(term.line[y][x].c, " ", 2);
1589 }
1590 }
1591 }
1592
1593 void
1594 tdeletechar(int n) {
1595 int src = term.c.x + n;
1596 int dst = term.c.x;
1597 int size = term.col - src;
1598
1599 term.dirty[term.c.y] = 1;
1600
1601 if(src >= term.col) {
1602 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1603 return;
1604 }
1605
1606 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1607 size * sizeof(Glyph));
1608 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1609 }
1610
1611 void
1612 tinsertblank(int n) {
1613 int src = term.c.x;
1614 int dst = src + n;
1615 int size = term.col - dst;
1616
1617 term.dirty[term.c.y] = 1;
1618
1619 if(dst >= term.col) {
1620 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1621 return;
1622 }
1623
1624 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1625 size * sizeof(Glyph));
1626 tclearregion(src, term.c.y, dst - 1, term.c.y);
1627 }
1628
1629 void
1630 tinsertblankline(int n) {
1631 if(BETWEEN(term.c.y, term.top, term.bot))
1632 tscrolldown(term.c.y, n);
1633 }
1634
1635 void
1636 tdeleteline(int n) {
1637 if(BETWEEN(term.c.y, term.top, term.bot))
1638 tscrollup(term.c.y, n);
1639 }
1640
1641 int32_t
1642 tdefcolor(int *attr, int *npar, int l) {
1643 int32_t idx = -1;
1644 uint r, g, b;
1645
1646 switch (attr[*npar + 1]) {
1647 case 2: /* direct colour in RGB space */
1648 if (*npar + 4 >= l) {
1649 fprintf(stderr,
1650 "erresc(38): Incorrect number of parameters (%d)\n",
1651 *npar);
1652 break;
1653 }
1654 r = attr[*npar + 2];
1655 g = attr[*npar + 3];
1656 b = attr[*npar + 4];
1657 *npar += 4;
1658 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1659 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1660 r, g, b);
1661 else
1662 idx = TRUECOLOR(r, g, b);
1663 break;
1664 case 5: /* indexed colour */
1665 if (*npar + 2 >= l) {
1666 fprintf(stderr,
1667 "erresc(38): Incorrect number of parameters (%d)\n",
1668 *npar);
1669 break;
1670 }
1671 *npar += 2;
1672 if(!BETWEEN(attr[*npar], 0, 255))
1673 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1674 else
1675 idx = attr[*npar];
1676 break;
1677 case 0: /* implemented defined (only foreground) */
1678 case 1: /* transparent */
1679 case 3: /* direct colour in CMY space */
1680 case 4: /* direct colour in CMYK space */
1681 default:
1682 fprintf(stderr,
1683 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1684 }
1685
1686 return idx;
1687 }
1688
1689 void
1690 tsetattr(int *attr, int l) {
1691 int i;
1692 int32_t idx;
1693
1694 for(i = 0; i < l; i++) {
1695 switch(attr[i]) {
1696 case 0:
1697 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1698 | ATTR_BOLD | ATTR_ITALIC \
1699 | ATTR_BLINK);
1700 term.c.attr.fg = defaultfg;
1701 term.c.attr.bg = defaultbg;
1702 break;
1703 case 1:
1704 term.c.attr.mode |= ATTR_BOLD;
1705 break;
1706 case 3:
1707 term.c.attr.mode |= ATTR_ITALIC;
1708 break;
1709 case 4:
1710 term.c.attr.mode |= ATTR_UNDERLINE;
1711 break;
1712 case 5: /* slow blink */
1713 case 6: /* rapid blink */
1714 term.c.attr.mode |= ATTR_BLINK;
1715 break;
1716 case 7:
1717 term.c.attr.mode |= ATTR_REVERSE;
1718 break;
1719 case 21:
1720 case 22:
1721 term.c.attr.mode &= ~ATTR_BOLD;
1722 break;
1723 case 23:
1724 term.c.attr.mode &= ~ATTR_ITALIC;
1725 break;
1726 case 24:
1727 term.c.attr.mode &= ~ATTR_UNDERLINE;
1728 break;
1729 case 25:
1730 case 26:
1731 term.c.attr.mode &= ~ATTR_BLINK;
1732 break;
1733 case 27:
1734 term.c.attr.mode &= ~ATTR_REVERSE;
1735 break;
1736 case 38:
1737 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1738 term.c.attr.fg = idx;
1739 break;
1740 case 39:
1741 term.c.attr.fg = defaultfg;
1742 break;
1743 case 48:
1744 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1745 term.c.attr.bg = idx;
1746 break;
1747 case 49:
1748 term.c.attr.bg = defaultbg;
1749 break;
1750 default:
1751 if(BETWEEN(attr[i], 30, 37)) {
1752 term.c.attr.fg = attr[i] - 30;
1753 } else if(BETWEEN(attr[i], 40, 47)) {
1754 term.c.attr.bg = attr[i] - 40;
1755 } else if(BETWEEN(attr[i], 90, 97)) {
1756 term.c.attr.fg = attr[i] - 90 + 8;
1757 } else if(BETWEEN(attr[i], 100, 107)) {
1758 term.c.attr.bg = attr[i] - 100 + 8;
1759 } else {
1760 fprintf(stderr,
1761 "erresc(default): gfx attr %d unknown\n",
1762 attr[i]), csidump();
1763 }
1764 break;
1765 }
1766 }
1767 }
1768
1769 void
1770 tsetscroll(int t, int b) {
1771 int temp;
1772
1773 LIMIT(t, 0, term.row-1);
1774 LIMIT(b, 0, term.row-1);
1775 if(t > b) {
1776 temp = t;
1777 t = b;
1778 b = temp;
1779 }
1780 term.top = t;
1781 term.bot = b;
1782 }
1783
1784 void
1785 tsetmode(bool priv, bool set, int *args, int narg) {
1786 int *lim, mode;
1787 bool alt;
1788
1789 for(lim = args + narg; args < lim; ++args) {
1790 if(priv) {
1791 switch(*args) {
1792 break;
1793 case 1: /* DECCKM -- Cursor key */
1794 MODBIT(term.mode, set, MODE_APPCURSOR);
1795 break;
1796 case 5: /* DECSCNM -- Reverse video */
1797 mode = term.mode;
1798 MODBIT(term.mode, set, MODE_REVERSE);
1799 if(mode != term.mode)
1800 redraw(REDRAW_TIMEOUT);
1801 break;
1802 case 6: /* DECOM -- Origin */
1803 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1804 tmoveato(0, 0);
1805 break;
1806 case 7: /* DECAWM -- Auto wrap */
1807 MODBIT(term.mode, set, MODE_WRAP);
1808 break;
1809 case 0: /* Error (IGNORED) */
1810 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1811 case 3: /* DECCOLM -- Column (IGNORED) */
1812 case 4: /* DECSCLM -- Scroll (IGNORED) */
1813 case 8: /* DECARM -- Auto repeat (IGNORED) */
1814 case 18: /* DECPFF -- Printer feed (IGNORED) */
1815 case 19: /* DECPEX -- Printer extent (IGNORED) */
1816 case 42: /* DECNRCM -- National characters (IGNORED) */
1817 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1818 break;
1819 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1820 MODBIT(term.mode, !set, MODE_HIDE);
1821 break;
1822 case 9: /* X10 mouse compatibility mode */
1823 xsetpointermotion(0);
1824 MODBIT(term.mode, 0, MODE_MOUSE);
1825 MODBIT(term.mode, set, MODE_MOUSEX10);
1826 break;
1827 case 1000: /* 1000: report button press */
1828 xsetpointermotion(0);
1829 MODBIT(term.mode, 0, MODE_MOUSE);
1830 MODBIT(term.mode, set, MODE_MOUSEBTN);
1831 break;
1832 case 1002: /* 1002: report motion on button press */
1833 xsetpointermotion(0);
1834 MODBIT(term.mode, 0, MODE_MOUSE);
1835 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1836 break;
1837 case 1003: /* 1003: enable all mouse motions */
1838 xsetpointermotion(set);
1839 MODBIT(term.mode, 0, MODE_MOUSE);
1840 MODBIT(term.mode, set, MODE_MOUSEMANY);
1841 break;
1842 case 1004: /* 1004: send focus events to tty */
1843 MODBIT(term.mode, set, MODE_FOCUS);
1844 break;
1845 case 1006: /* 1006: extended reporting mode */
1846 MODBIT(term.mode, set, MODE_MOUSESGR);
1847 break;
1848 case 1034:
1849 MODBIT(term.mode, set, MODE_8BIT);
1850 break;
1851 case 1049: /* swap screen & set/restore cursor as xterm */
1852 if (!allowaltscreen)
1853 break;
1854 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1855 /* FALLTHRU */
1856 case 47: /* swap screen */
1857 case 1047:
1858 if (!allowaltscreen)
1859 break;
1860 alt = IS_SET(MODE_ALTSCREEN);
1861 if(alt) {
1862 tclearregion(0, 0, term.col-1,
1863 term.row-1);
1864 }
1865 if(set ^ alt) /* set is always 1 or 0 */
1866 tswapscreen();
1867 if(*args != 1049)
1868 break;
1869 /* FALLTRU */
1870 case 1048:
1871 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1872 break;
1873 case 2004: /* 2004: bracketed paste mode */
1874 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1875 break;
1876 /* Not implemented mouse modes. See comments there. */
1877 case 1001: /* mouse highlight mode; can hang the
1878 terminal by design when implemented. */
1879 case 1005: /* UTF-8 mouse mode; will confuse
1880 applications not supporting UTF-8
1881 and luit. */
1882 case 1015: /* urxvt mangled mouse mode; incompatible
1883 and can be mistaken for other control
1884 codes. */
1885 default:
1886 fprintf(stderr,
1887 "erresc: unknown private set/reset mode %d\n",
1888 *args);
1889 break;
1890 }
1891 } else {
1892 switch(*args) {
1893 case 0: /* Error (IGNORED) */
1894 break;
1895 case 2: /* KAM -- keyboard action */
1896 MODBIT(term.mode, set, MODE_KBDLOCK);
1897 break;
1898 case 4: /* IRM -- Insertion-replacement */
1899 MODBIT(term.mode, set, MODE_INSERT);
1900 break;
1901 case 12: /* SRM -- Send/Receive */
1902 MODBIT(term.mode, !set, MODE_ECHO);
1903 break;
1904 case 20: /* LNM -- Linefeed/new line */
1905 MODBIT(term.mode, set, MODE_CRLF);
1906 break;
1907 default:
1908 fprintf(stderr,
1909 "erresc: unknown set/reset mode %d\n",
1910 *args);
1911 break;
1912 }
1913 }
1914 }
1915 }
1916
1917 void
1918 csihandle(void) {
1919 char buf[40];
1920 int len;
1921
1922 switch(csiescseq.mode) {
1923 default:
1924 unknown:
1925 fprintf(stderr, "erresc: unknown csi ");
1926 csidump();
1927 /* die(""); */
1928 break;
1929 case '@': /* ICH -- Insert <n> blank char */
1930 DEFAULT(csiescseq.arg[0], 1);
1931 tinsertblank(csiescseq.arg[0]);
1932 break;
1933 case 'A': /* CUU -- Cursor <n> Up */
1934 DEFAULT(csiescseq.arg[0], 1);
1935 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1936 break;
1937 case 'B': /* CUD -- Cursor <n> Down */
1938 case 'e': /* VPR --Cursor <n> Down */
1939 DEFAULT(csiescseq.arg[0], 1);
1940 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1941 break;
1942 case 'i': /* MC -- Media Copy */
1943 switch(csiescseq.arg[0]) {
1944 case 0:
1945 tdump();
1946 break;
1947 case 1:
1948 tdumpline(term.c.y);
1949 break;
1950 case 2:
1951 tdumpsel();
1952 break;
1953 case 4:
1954 term.mode &= ~MODE_PRINT;
1955 break;
1956 case 5:
1957 term.mode |= MODE_PRINT;
1958 break;
1959 }
1960 break;
1961 case 'c': /* DA -- Device Attributes */
1962 if(csiescseq.arg[0] == 0)
1963 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1964 break;
1965 case 'C': /* CUF -- Cursor <n> Forward */
1966 case 'a': /* HPR -- Cursor <n> Forward */
1967 DEFAULT(csiescseq.arg[0], 1);
1968 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1969 break;
1970 case 'D': /* CUB -- Cursor <n> Backward */
1971 DEFAULT(csiescseq.arg[0], 1);
1972 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1973 break;
1974 case 'E': /* CNL -- Cursor <n> Down and first col */
1975 DEFAULT(csiescseq.arg[0], 1);
1976 tmoveto(0, term.c.y+csiescseq.arg[0]);
1977 break;
1978 case 'F': /* CPL -- Cursor <n> Up and first col */
1979 DEFAULT(csiescseq.arg[0], 1);
1980 tmoveto(0, term.c.y-csiescseq.arg[0]);
1981 break;
1982 case 'g': /* TBC -- Tabulation clear */
1983 switch(csiescseq.arg[0]) {
1984 case 0: /* clear current tab stop */
1985 term.tabs[term.c.x] = 0;
1986 break;
1987 case 3: /* clear all the tabs */
1988 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1989 break;
1990 default:
1991 goto unknown;
1992 }
1993 break;
1994 case 'G': /* CHA -- Move to <col> */
1995 case '`': /* HPA */
1996 DEFAULT(csiescseq.arg[0], 1);
1997 tmoveto(csiescseq.arg[0]-1, term.c.y);
1998 break;
1999 case 'H': /* CUP -- Move to <row> <col> */
2000 case 'f': /* HVP */
2001 DEFAULT(csiescseq.arg[0], 1);
2002 DEFAULT(csiescseq.arg[1], 1);
2003 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2004 break;
2005 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2006 DEFAULT(csiescseq.arg[0], 1);
2007 while(csiescseq.arg[0]--)
2008 tputtab(1);
2009 break;
2010 case 'J': /* ED -- Clear screen */
2011 selclear(NULL);
2012 switch(csiescseq.arg[0]) {
2013 case 0: /* below */
2014 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2015 if(term.c.y < term.row-1) {
2016 tclearregion(0, term.c.y+1, term.col-1,
2017 term.row-1);
2018 }
2019 break;
2020 case 1: /* above */
2021 if(term.c.y > 1)
2022 tclearregion(0, 0, term.col-1, term.c.y-1);
2023 tclearregion(0, term.c.y, term.c.x, term.c.y);
2024 break;
2025 case 2: /* all */
2026 tclearregion(0, 0, term.col-1, term.row-1);
2027 break;
2028 default:
2029 goto unknown;
2030 }
2031 break;
2032 case 'K': /* EL -- Clear line */
2033 switch(csiescseq.arg[0]) {
2034 case 0: /* right */
2035 tclearregion(term.c.x, term.c.y, term.col-1,
2036 term.c.y);
2037 break;
2038 case 1: /* left */
2039 tclearregion(0, term.c.y, term.c.x, term.c.y);
2040 break;
2041 case 2: /* all */
2042 tclearregion(0, term.c.y, term.col-1, term.c.y);
2043 break;
2044 }
2045 break;
2046 case 'S': /* SU -- Scroll <n> line up */
2047 DEFAULT(csiescseq.arg[0], 1);
2048 tscrollup(term.top, csiescseq.arg[0]);
2049 break;
2050 case 'T': /* SD -- Scroll <n> line down */
2051 DEFAULT(csiescseq.arg[0], 1);
2052 tscrolldown(term.top, csiescseq.arg[0]);
2053 break;
2054 case 'L': /* IL -- Insert <n> blank lines */
2055 DEFAULT(csiescseq.arg[0], 1);
2056 tinsertblankline(csiescseq.arg[0]);
2057 break;
2058 case 'l': /* RM -- Reset Mode */
2059 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2060 break;
2061 case 'M': /* DL -- Delete <n> lines */
2062 DEFAULT(csiescseq.arg[0], 1);
2063 tdeleteline(csiescseq.arg[0]);
2064 break;
2065 case 'X': /* ECH -- Erase <n> char */
2066 DEFAULT(csiescseq.arg[0], 1);
2067 tclearregion(term.c.x, term.c.y,
2068 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2069 break;
2070 case 'P': /* DCH -- Delete <n> char */
2071 DEFAULT(csiescseq.arg[0], 1);
2072 tdeletechar(csiescseq.arg[0]);
2073 break;
2074 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2075 DEFAULT(csiescseq.arg[0], 1);
2076 while(csiescseq.arg[0]--)
2077 tputtab(0);
2078 break;
2079 case 'd': /* VPA -- Move to <row> */
2080 DEFAULT(csiescseq.arg[0], 1);
2081 tmoveato(term.c.x, csiescseq.arg[0]-1);
2082 break;
2083 case 'h': /* SM -- Set terminal mode */
2084 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2085 break;
2086 case 'm': /* SGR -- Terminal attribute (color) */
2087 tsetattr(csiescseq.arg, csiescseq.narg);
2088 break;
2089 case 'n': /* DSR – Device Status Report (cursor position) */
2090 if (csiescseq.arg[0] == 6) {
2091 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2092 term.c.y+1, term.c.x+1);
2093 ttywrite(buf, len);
2094 break;
2095 }
2096 case 'r': /* DECSTBM -- Set Scrolling Region */
2097 if(csiescseq.priv) {
2098 goto unknown;
2099 } else {
2100 DEFAULT(csiescseq.arg[0], 1);
2101 DEFAULT(csiescseq.arg[1], term.row);
2102 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2103 tmoveato(0, 0);
2104 }
2105 break;
2106 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2107 tcursor(CURSOR_SAVE);
2108 break;
2109 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2110 tcursor(CURSOR_LOAD);
2111 break;
2112 }
2113 }
2114
2115 void
2116 csidump(void) {
2117 int i;
2118 uint c;
2119
2120 printf("ESC[");
2121 for(i = 0; i < csiescseq.len; i++) {
2122 c = csiescseq.buf[i] & 0xff;
2123 if(isprint(c)) {
2124 putchar(c);
2125 } else if(c == '\n') {
2126 printf("(\\n)");
2127 } else if(c == '\r') {
2128 printf("(\\r)");
2129 } else if(c == 0x1b) {
2130 printf("(\\e)");
2131 } else {
2132 printf("(%02x)", c);
2133 }
2134 }
2135 putchar('\n');
2136 }
2137
2138 void
2139 csireset(void) {
2140 memset(&csiescseq, 0, sizeof(csiescseq));
2141 }
2142
2143 void
2144 strhandle(void) {
2145 char *p = NULL;
2146 int j, narg, par;
2147
2148 strparse();
2149 narg = strescseq.narg;
2150 par = atoi(strescseq.args[0]);
2151
2152 switch(strescseq.type) {
2153 case ']': /* OSC -- Operating System Command */
2154 switch(par) {
2155 case 0:
2156 case 1:
2157 case 2:
2158 if(narg > 1)
2159 xsettitle(strescseq.args[1]);
2160 return;
2161 case 4: /* color set */
2162 if(narg < 3)
2163 break;
2164 p = strescseq.args[2];
2165 /* fall through */
2166 case 104: /* color reset, here p = NULL */
2167 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2168 if (!xsetcolorname(j, p)) {
2169 fprintf(stderr, "erresc: invalid color %s\n", p);
2170 } else {
2171 /*
2172 * TODO if defaultbg color is changed, borders
2173 * are dirty
2174 */
2175 redraw(0);
2176 }
2177 return;
2178 }
2179 break;
2180 case 'k': /* old title set compatibility */
2181 xsettitle(strescseq.args[0]);
2182 return;
2183 case 'P': /* DSC -- Device Control String */
2184 case '_': /* APC -- Application Program Command */
2185 case '^': /* PM -- Privacy Message */
2186 return;
2187 }
2188
2189 fprintf(stderr, "erresc: unknown str ");
2190 strdump();
2191 }
2192
2193 void
2194 strparse(void) {
2195 char *p = strescseq.buf;
2196
2197 strescseq.narg = 0;
2198 strescseq.buf[strescseq.len] = '\0';
2199 while(p && strescseq.narg < STR_ARG_SIZ)
2200 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2201 }
2202
2203 void
2204 strdump(void) {
2205 int i;
2206 uint c;
2207
2208 printf("ESC%c", strescseq.type);
2209 for(i = 0; i < strescseq.len; i++) {
2210 c = strescseq.buf[i] & 0xff;
2211 if(c == '\0') {
2212 return;
2213 } else if(isprint(c)) {
2214 putchar(c);
2215 } else if(c == '\n') {
2216 printf("(\\n)");
2217 } else if(c == '\r') {
2218 printf("(\\r)");
2219 } else if(c == 0x1b) {
2220 printf("(\\e)");
2221 } else {
2222 printf("(%02x)", c);
2223 }
2224 }
2225 printf("ESC\\\n");
2226 }
2227
2228 void
2229 strreset(void) {
2230 memset(&strescseq, 0, sizeof(strescseq));
2231 }
2232
2233 void
2234 tprinter(char *s, size_t len) {
2235 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2236 fprintf(stderr, "Error writing in %s:%s\n",
2237 opt_io, strerror(errno));
2238 close(iofd);
2239 iofd = -1;
2240 }
2241 }
2242
2243 void
2244 toggleprinter(const Arg *arg) {
2245 term.mode ^= MODE_PRINT;
2246 }
2247
2248 void
2249 printscreen(const Arg *arg) {
2250 tdump();
2251 }
2252
2253 void
2254 printsel(const Arg *arg) {
2255 tdumpsel();
2256 }
2257
2258 void
2259 tdumpsel(void)
2260 {
2261 char *ptr;
2262
2263 if((ptr = getsel())) {
2264 tprinter(ptr, strlen(ptr));
2265 free(ptr);
2266 }
2267 }
2268
2269 void
2270 tdumpline(int n) {
2271 Glyph *bp, *end;
2272
2273 bp = &term.line[n][0];
2274 end = &bp[term.col-1];
2275 while(end > bp && !strcmp(" ", end->c))
2276 --end;
2277 if(bp != end || strcmp(bp->c, " ")) {
2278 for( ;bp <= end; ++bp)
2279 tprinter(bp->c, strlen(bp->c));
2280 }
2281 tprinter("\n", 1);
2282 }
2283
2284 void
2285 tdump(void) {
2286 int i;
2287
2288 for(i = 0; i < term.row; ++i)
2289 tdumpline(i);
2290 }
2291
2292 void
2293 tputtab(bool forward) {
2294 uint x = term.c.x;
2295
2296 if(forward) {
2297 if(x == term.col)
2298 return;
2299 for(++x; x < term.col && !term.tabs[x]; ++x)
2300 /* nothing */ ;
2301 } else {
2302 if(x == 0)
2303 return;
2304 for(--x; x > 0 && !term.tabs[x]; --x)
2305 /* nothing */ ;
2306 }
2307 tmoveto(x, term.c.y);
2308 }
2309
2310 void
2311 techo(char *buf, int len) {
2312 for(; len > 0; buf++, len--) {
2313 char c = *buf;
2314
2315 if(c < '\x20') { /* control code */
2316 if(c != '\n' && c != '\r' && c != '\t') {
2317 c |= '\x40';
2318 tputc("^", 1);
2319 }
2320 tputc(&c, 1);
2321 } else {
2322 break;
2323 }
2324 }
2325 if(len)
2326 tputc(buf, len);
2327 }
2328
2329 void
2330 tdeftran(char ascii) {
2331 char c, (*bp)[2];
2332 static char tbl[][2] = {
2333 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2334 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2335 {'5', CS_FIN}, {'C', CS_FIN},
2336 {0, 0}
2337 };
2338
2339 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2340 /* nothing */;
2341
2342 if (c == 0)
2343 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2344 else
2345 term.trantbl[term.icharset] = (*bp)[1];
2346 }
2347
2348 void
2349 tselcs(void) {
2350 MODBIT(term.c.attr.mode,
2351 term.trantbl[term.charset] == CS_GRAPHIC0,
2352 ATTR_GFX);
2353 }
2354
2355 void
2356 tputc(char *c, int len) {
2357 uchar ascii = *c;
2358 bool control = ascii < '\x20' || ascii == 0177;
2359 long unicodep;
2360 int width;
2361
2362 if(len == 1) {
2363 width = 1;
2364 } else {
2365 utf8decode(c, &unicodep, UTF_SIZ);
2366 width = wcwidth(unicodep);
2367 }
2368
2369 if(IS_SET(MODE_PRINT))
2370 tprinter(c, len);
2371
2372 /*
2373 * STR sequences must be checked before anything else
2374 * because it can use some control codes as part of the sequence.
2375 */
2376 if(term.esc & ESC_STR) {
2377 switch(ascii) {
2378 case '\033':
2379 term.esc = ESC_START | ESC_STR_END;
2380 break;
2381 case '\a': /* backwards compatibility to xterm */
2382 term.esc = 0;
2383 strhandle();
2384 break;
2385 default:
2386 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2387 memmove(&strescseq.buf[strescseq.len], c, len);
2388 strescseq.len += len;
2389 } else {
2390 /*
2391 * Here is a bug in terminals. If the user never sends
2392 * some code to stop the str or esc command, then st
2393 * will stop responding. But this is better than
2394 * silently failing with unknown characters. At least
2395 * then users will report back.
2396 *
2397 * In the case users ever get fixed, here is the code:
2398 */
2399 /*
2400 * term.esc = 0;
2401 * strhandle();
2402 */
2403 }
2404 }
2405 return;
2406 }
2407
2408 /*
2409 * Actions of control codes must be performed as soon they arrive
2410 * because they can be embedded inside a control sequence, and
2411 * they must not cause conflicts with sequences.
2412 */
2413 if(control) {
2414 switch(ascii) {
2415 case '\t': /* HT */
2416 tputtab(1);
2417 return;
2418 case '\b': /* BS */
2419 tmoveto(term.c.x-1, term.c.y);
2420 return;
2421 case '\r': /* CR */
2422 tmoveto(0, term.c.y);
2423 return;
2424 case '\f': /* LF */
2425 case '\v': /* VT */
2426 case '\n': /* LF */
2427 /* go to first col if the mode is set */
2428 tnewline(IS_SET(MODE_CRLF));
2429 return;
2430 case '\a': /* BEL */
2431 if(!(xw.state & WIN_FOCUSED))
2432 xseturgency(1);
2433 if (bellvolume)
2434 XBell(xw.dpy, bellvolume);
2435 return;
2436 case '\033': /* ESC */
2437 csireset();
2438 term.esc = ESC_START;
2439 return;
2440 case '\016': /* SO */
2441 term.charset = 0;
2442 tselcs();
2443 return;
2444 case '\017': /* SI */
2445 term.charset = 1;
2446 tselcs();
2447 return;
2448 case '\032': /* SUB */
2449 case '\030': /* CAN */
2450 csireset();
2451 return;
2452 case '\005': /* ENQ (IGNORED) */
2453 case '\000': /* NUL (IGNORED) */
2454 case '\021': /* XON (IGNORED) */
2455 case '\023': /* XOFF (IGNORED) */
2456 case 0177: /* DEL (IGNORED) */
2457 return;
2458 }
2459 } else if(term.esc & ESC_START) {
2460 if(term.esc & ESC_CSI) {
2461 csiescseq.buf[csiescseq.len++] = ascii;
2462 if(BETWEEN(ascii, 0x40, 0x7E)
2463 || csiescseq.len >= \
2464 sizeof(csiescseq.buf)-1) {
2465 term.esc = 0;
2466 csiparse();
2467 csihandle();
2468 }
2469 } else if(term.esc & ESC_STR_END) {
2470 term.esc = 0;
2471 if(ascii == '\\')
2472 strhandle();
2473 } else if(term.esc & ESC_ALTCHARSET) {
2474 tdeftran(ascii);
2475 tselcs();
2476 term.esc = 0;
2477 } else if(term.esc & ESC_TEST) {
2478 if(ascii == '8') { /* DEC screen alignment test. */
2479 char E[UTF_SIZ] = "E";
2480 int x, y;
2481
2482 for(x = 0; x < term.col; ++x) {
2483 for(y = 0; y < term.row; ++y)
2484 tsetchar(E, &term.c.attr, x, y);
2485 }
2486 }
2487 term.esc = 0;
2488 } else {
2489 switch(ascii) {
2490 case '[':
2491 term.esc |= ESC_CSI;
2492 break;
2493 case '#':
2494 term.esc |= ESC_TEST;
2495 break;
2496 case 'P': /* DCS -- Device Control String */
2497 case '_': /* APC -- Application Program Command */
2498 case '^': /* PM -- Privacy Message */
2499 case ']': /* OSC -- Operating System Command */
2500 case 'k': /* old title set compatibility */
2501 strreset();
2502 strescseq.type = ascii;
2503 term.esc |= ESC_STR;
2504 break;
2505 case '(': /* set primary charset G0 */
2506 case ')': /* set secondary charset G1 */
2507 case '*': /* set tertiary charset G2 */
2508 case '+': /* set quaternary charset G3 */
2509 term.icharset = ascii - '(';
2510 term.esc |= ESC_ALTCHARSET;
2511 break;
2512 case 'D': /* IND -- Linefeed */
2513 if(term.c.y == term.bot) {
2514 tscrollup(term.top, 1);
2515 } else {
2516 tmoveto(term.c.x, term.c.y+1);
2517 }
2518 term.esc = 0;
2519 break;
2520 case 'E': /* NEL -- Next line */
2521 tnewline(1); /* always go to first col */
2522 term.esc = 0;
2523 break;
2524 case 'H': /* HTS -- Horizontal tab stop */
2525 term.tabs[term.c.x] = 1;
2526 term.esc = 0;
2527 break;
2528 case 'M': /* RI -- Reverse index */
2529 if(term.c.y == term.top) {
2530 tscrolldown(term.top, 1);
2531 } else {
2532 tmoveto(term.c.x, term.c.y-1);
2533 }
2534 term.esc = 0;
2535 break;
2536 case 'Z': /* DECID -- Identify Terminal */
2537 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2538 term.esc = 0;
2539 break;
2540 case 'c': /* RIS -- Reset to inital state */
2541 treset();
2542 term.esc = 0;
2543 xresettitle();
2544 xloadcols();
2545 break;
2546 case '=': /* DECPAM -- Application keypad */
2547 term.mode |= MODE_APPKEYPAD;
2548 term.esc = 0;
2549 break;
2550 case '>': /* DECPNM -- Normal keypad */
2551 term.mode &= ~MODE_APPKEYPAD;
2552 term.esc = 0;
2553 break;
2554 case '7': /* DECSC -- Save Cursor */
2555 tcursor(CURSOR_SAVE);
2556 term.esc = 0;
2557 break;
2558 case '8': /* DECRC -- Restore Cursor */
2559 tcursor(CURSOR_LOAD);
2560 term.esc = 0;
2561 break;
2562 case '\\': /* ST -- Stop */
2563 term.esc = 0;
2564 break;
2565 default:
2566 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2567 (uchar) ascii, isprint(ascii)? ascii:'.');
2568 term.esc = 0;
2569 }
2570 }
2571 /*
2572 * All characters which form part of a sequence are not
2573 * printed
2574 */
2575 return;
2576 }
2577 /*
2578 * Display control codes only if we are in graphic mode
2579 */
2580 if(control && !(term.c.attr.mode & ATTR_GFX))
2581 return;
2582 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2583 selclear(NULL);
2584 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2585 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2586 tnewline(1);
2587 }
2588
2589 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2590 memmove(&term.line[term.c.y][term.c.x+1],
2591 &term.line[term.c.y][term.c.x],
2592 (term.col - term.c.x - 1) * sizeof(Glyph));
2593 }
2594
2595 if(term.c.x+width > term.col)
2596 tnewline(1);
2597
2598 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2599
2600 if(width == 2) {
2601 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2602 if(term.c.x+1 < term.col) {
2603 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2604 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2605 }
2606 }
2607 if(term.c.x+width < term.col) {
2608 tmoveto(term.c.x+width, term.c.y);
2609 } else {
2610 term.c.state |= CURSOR_WRAPNEXT;
2611 }
2612 }
2613
2614 int
2615 tresize(int col, int row) {
2616 int i;
2617 int minrow = MIN(row, term.row);
2618 int mincol = MIN(col, term.col);
2619 int slide = term.c.y - row + 1;
2620 bool *bp;
2621 Line *orig;
2622
2623 if(col < 1 || row < 1)
2624 return 0;
2625
2626 /* free unneeded rows */
2627 i = 0;
2628 if(slide > 0) {
2629 /*
2630 * slide screen to keep cursor where we expect it -
2631 * tscrollup would work here, but we can optimize to
2632 * memmove because we're freeing the earlier lines
2633 */
2634 for(/* i = 0 */; i < slide; i++) {
2635 free(term.line[i]);
2636 free(term.alt[i]);
2637 }
2638 memmove(term.line, term.line + slide, row * sizeof(Line));
2639 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2640 }
2641 for(i += row; i < term.row; i++) {
2642 free(term.line[i]);
2643 free(term.alt[i]);
2644 }
2645
2646 /* resize to new height */
2647 term.line = xrealloc(term.line, row * sizeof(Line));
2648 term.alt = xrealloc(term.alt, row * sizeof(Line));
2649 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2650 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2651
2652 /* resize each row to new width, zero-pad if needed */
2653 for(i = 0; i < minrow; i++) {
2654 term.dirty[i] = 1;
2655 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2656 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2657 }
2658
2659 /* allocate any new rows */
2660 for(/* i == minrow */; i < row; i++) {
2661 term.dirty[i] = 1;
2662 term.line[i] = xmalloc(col * sizeof(Glyph));
2663 term.alt[i] = xmalloc(col * sizeof(Glyph));
2664 }
2665 if(col > term.col) {
2666 bp = term.tabs + term.col;
2667
2668 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2669 while(--bp > term.tabs && !*bp)
2670 /* nothing */ ;
2671 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2672 *bp = 1;
2673 }
2674 /* update terminal size */
2675 term.col = col;
2676 term.row = row;
2677 /* reset scrolling region */
2678 tsetscroll(0, row-1);
2679 /* make use of the LIMIT in tmoveto */
2680 tmoveto(term.c.x, term.c.y);
2681 /* Clearing both screens */
2682 orig = term.line;
2683 do {
2684 if(mincol < col && 0 < minrow) {
2685 tclearregion(mincol, 0, col - 1, minrow - 1);
2686 }
2687 if(0 < col && minrow < row) {
2688 tclearregion(0, minrow, col - 1, row - 1);
2689 }
2690 tswapscreen();
2691 } while(orig != term.line);
2692
2693 return (slide > 0);
2694 }
2695
2696 void
2697 xresize(int col, int row) {
2698 xw.tw = MAX(1, col * xw.cw);
2699 xw.th = MAX(1, row * xw.ch);
2700
2701 XFreePixmap(xw.dpy, xw.buf);
2702 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2703 DefaultDepth(xw.dpy, xw.scr));
2704 XftDrawChange(xw.draw, xw.buf);
2705 xclear(0, 0, xw.w, xw.h);
2706 }
2707
2708 static inline ushort
2709 sixd_to_16bit(int x) {
2710 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2711 }
2712
2713 void
2714 xloadcols(void) {
2715 int i, r, g, b;
2716 XRenderColor color = { .alpha = 0xffff };
2717 static bool loaded;
2718 Colour *cp;
2719
2720 if(loaded) {
2721 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2722 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2723 }
2724
2725 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2726 for(i = 0; i < LEN(colorname); i++) {
2727 if(!colorname[i])
2728 continue;
2729 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2730 die("Could not allocate color '%s'\n", colorname[i]);
2731 }
2732 }
2733
2734 /* load colors [16-255] ; same colors as xterm */
2735 for(i = 16, r = 0; r < 6; r++) {
2736 for(g = 0; g < 6; g++) {
2737 for(b = 0; b < 6; b++) {
2738 color.red = sixd_to_16bit(r);
2739 color.green = sixd_to_16bit(g);
2740 color.blue = sixd_to_16bit(b);
2741 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2742 die("Could not allocate color %d\n", i);
2743 }
2744 i++;
2745 }
2746 }
2747 }
2748
2749 for(r = 0; r < 24; r++, i++) {
2750 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2751 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2752 &dc.col[i])) {
2753 die("Could not allocate color %d\n", i);
2754 }
2755 }
2756 loaded = true;
2757 }
2758
2759 int
2760 xsetcolorname(int x, const char *name) {
2761 XRenderColor color = { .alpha = 0xffff };
2762 Colour colour;
2763 if (x < 0 || x > LEN(colorname))
2764 return -1;
2765 if(!name) {
2766 if(16 <= x && x < 16 + 216) {
2767 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2768 color.red = sixd_to_16bit(r);
2769 color.green = sixd_to_16bit(g);
2770 color.blue = sixd_to_16bit(b);
2771 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2772 return 0; /* something went wrong */
2773 dc.col[x] = colour;
2774 return 1;
2775 } else if (16 + 216 <= x && x < 256) {
2776 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2777 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2778 return 0; /* something went wrong */
2779 dc.col[x] = colour;
2780 return 1;
2781 } else {
2782 name = colorname[x];
2783 }
2784 }
2785 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2786 return 0;
2787 dc.col[x] = colour;
2788 return 1;
2789 }
2790
2791 void
2792 xtermclear(int col1, int row1, int col2, int row2) {
2793 XftDrawRect(xw.draw,
2794 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2795 borderpx + col1 * xw.cw,
2796 borderpx + row1 * xw.ch,
2797 (col2-col1+1) * xw.cw,
2798 (row2-row1+1) * xw.ch);
2799 }
2800
2801 /*
2802 * Absolute coordinates.
2803 */
2804 void
2805 xclear(int x1, int y1, int x2, int y2) {
2806 XftDrawRect(xw.draw,
2807 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2808 x1, y1, x2-x1, y2-y1);
2809 }
2810
2811 void
2812 xhints(void) {
2813 XClassHint class = {opt_class ? opt_class : termname, termname};
2814 XWMHints wm = {.flags = InputHint, .input = 1};
2815 XSizeHints *sizeh = NULL;
2816
2817 sizeh = XAllocSizeHints();
2818 if(xw.isfixed == False) {
2819 sizeh->flags = PSize | PResizeInc | PBaseSize;
2820 sizeh->height = xw.h;
2821 sizeh->width = xw.w;
2822 sizeh->height_inc = xw.ch;
2823 sizeh->width_inc = xw.cw;
2824 sizeh->base_height = 2 * borderpx;
2825 sizeh->base_width = 2 * borderpx;
2826 } else {
2827 sizeh->flags = PMaxSize | PMinSize;
2828 sizeh->min_width = sizeh->max_width = xw.fw;
2829 sizeh->min_height = sizeh->max_height = xw.fh;
2830 }
2831
2832 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2833 &class);
2834 XFree(sizeh);
2835 }
2836
2837 int
2838 xloadfont(Font *f, FcPattern *pattern) {
2839 FcPattern *match;
2840 FcResult result;
2841
2842 match = FcFontMatch(NULL, pattern, &result);
2843 if(!match)
2844 return 1;
2845
2846 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2847 FcPatternDestroy(match);
2848 return 1;
2849 }
2850
2851 f->set = NULL;
2852 f->pattern = FcPatternDuplicate(pattern);
2853
2854 f->ascent = f->match->ascent;
2855 f->descent = f->match->descent;
2856 f->lbearing = 0;
2857 f->rbearing = f->match->max_advance_width;
2858
2859 f->height = f->ascent + f->descent;
2860 f->width = f->lbearing + f->rbearing;
2861
2862 return 0;
2863 }
2864
2865 void
2866 xloadfonts(char *fontstr, double fontsize) {
2867 FcPattern *pattern;
2868 FcResult r_sz, r_psz;
2869 double fontval;
2870
2871 if(fontstr[0] == '-') {
2872 pattern = XftXlfdParse(fontstr, False, False);
2873 } else {
2874 pattern = FcNameParse((FcChar8 *)fontstr);
2875 }
2876
2877 if(!pattern)
2878 die("st: can't open font %s\n", fontstr);
2879
2880 if(fontsize > 0) {
2881 FcPatternDel(pattern, FC_PIXEL_SIZE);
2882 FcPatternDel(pattern, FC_SIZE);
2883 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2884 usedfontsize = fontsize;
2885 } else {
2886 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2887 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2888 if(r_psz == FcResultMatch) {
2889 usedfontsize = fontval;
2890 } else if(r_sz == FcResultMatch) {
2891 usedfontsize = -1;
2892 } else {
2893 /*
2894 * Default font size is 12, if none given. This is to
2895 * have a known usedfontsize value.
2896 */
2897 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2898 usedfontsize = 12;
2899 }
2900 }
2901
2902 FcConfigSubstitute(0, pattern, FcMatchPattern);
2903 FcDefaultSubstitute(pattern);
2904
2905 if(xloadfont(&dc.font, pattern))
2906 die("st: can't open font %s\n", fontstr);
2907
2908 if(usedfontsize < 0) {
2909 FcPatternGetDouble(dc.font.match->pattern,
2910 FC_PIXEL_SIZE, 0, &fontval);
2911 usedfontsize = fontval;
2912 }
2913
2914 /* Setting character width and height. */
2915 xw.cw = CEIL(dc.font.width * cwscale);
2916 xw.ch = CEIL(dc.font.height * chscale);
2917
2918 FcPatternDel(pattern, FC_SLANT);
2919 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2920 if(xloadfont(&dc.ifont, pattern))
2921 die("st: can't open font %s\n", fontstr);
2922
2923 FcPatternDel(pattern, FC_WEIGHT);
2924 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2925 if(xloadfont(&dc.ibfont, pattern))
2926 die("st: can't open font %s\n", fontstr);
2927
2928 FcPatternDel(pattern, FC_SLANT);
2929 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2930 if(xloadfont(&dc.bfont, pattern))
2931 die("st: can't open font %s\n", fontstr);
2932
2933 FcPatternDestroy(pattern);
2934 }
2935
2936 int
2937 xloadfontset(Font *f) {
2938 FcResult result;
2939
2940 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2941 return 1;
2942 return 0;
2943 }
2944
2945 void
2946 xunloadfont(Font *f) {
2947 XftFontClose(xw.dpy, f->match);
2948 FcPatternDestroy(f->pattern);
2949 if(f->set)
2950 FcFontSetDestroy(f->set);
2951 }
2952
2953 void
2954 xunloadfonts(void) {
2955 int i;
2956
2957 /* Free the loaded fonts in the font cache. */
2958 for(i = 0; i < frclen; i++) {
2959 XftFontClose(xw.dpy, frc[i].font);
2960 }
2961 frclen = 0;
2962
2963 xunloadfont(&dc.font);
2964 xunloadfont(&dc.bfont);
2965 xunloadfont(&dc.ifont);
2966 xunloadfont(&dc.ibfont);
2967 }
2968
2969 void
2970 xzoom(const Arg *arg) {
2971 xunloadfonts();
2972 xloadfonts(usedfont, usedfontsize + arg->i);
2973 cresize(0, 0);
2974 redraw(0);
2975 }
2976
2977 void
2978 xinit(void) {
2979 XGCValues gcvalues;
2980 Cursor cursor;
2981 Window parent;
2982 int sw, sh;
2983 pid_t thispid = getpid();
2984
2985 if(!(xw.dpy = XOpenDisplay(NULL)))
2986 die("Can't open display\n");
2987 xw.scr = XDefaultScreen(xw.dpy);
2988 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2989
2990 /* font */
2991 if(!FcInit())
2992 die("Could not init fontconfig.\n");
2993
2994 usedfont = (opt_font == NULL)? font : opt_font;
2995 xloadfonts(usedfont, 0);
2996
2997 /* colors */
2998 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2999 xloadcols();
3000
3001 /* adjust fixed window geometry */
3002 if(xw.isfixed) {
3003 sw = DisplayWidth(xw.dpy, xw.scr);
3004 sh = DisplayHeight(xw.dpy, xw.scr);
3005 if(xw.fx < 0)
3006 xw.fx = sw + xw.fx - xw.fw - 1;
3007 if(xw.fy < 0)
3008 xw.fy = sh + xw.fy - xw.fh - 1;
3009
3010 xw.h = xw.fh;
3011 xw.w = xw.fw;
3012 } else {
3013 /* window - default size */
3014 xw.h = 2 * borderpx + term.row * xw.ch;
3015 xw.w = 2 * borderpx + term.col * xw.cw;
3016 xw.fx = 0;
3017 xw.fy = 0;
3018 }
3019
3020 /* Events */
3021 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3022 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3023 xw.attrs.bit_gravity = NorthWestGravity;
3024 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3025 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3026 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3027 xw.attrs.colormap = xw.cmap;
3028
3029 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3030 XRootWindow(xw.dpy, xw.scr);
3031 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
3032 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3033 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3034 | CWEventMask | CWColormap, &xw.attrs);
3035
3036 memset(&gcvalues, 0, sizeof(gcvalues));
3037 gcvalues.graphics_exposures = False;
3038 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3039 &gcvalues);
3040 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3041 DefaultDepth(xw.dpy, xw.scr));
3042 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3043 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3044
3045 /* Xft rendering context */
3046 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3047
3048 /* input methods */
3049 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3050 XSetLocaleModifiers("@im=local");
3051 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3052 XSetLocaleModifiers("@im=");
3053 if((xw.xim = XOpenIM(xw.dpy,
3054 NULL, NULL, NULL)) == NULL) {
3055 die("XOpenIM failed. Could not open input"
3056 " device.\n");
3057 }
3058 }
3059 }
3060 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3061 | XIMStatusNothing, XNClientWindow, xw.win,
3062 XNFocusWindow, xw.win, NULL);
3063 if(xw.xic == NULL)
3064 die("XCreateIC failed. Could not obtain input method.\n");
3065
3066 /* white cursor, black outline */
3067 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3068 XDefineCursor(xw.dpy, xw.win, cursor);
3069 XRecolorCursor(xw.dpy, cursor,
3070 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3071 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3072
3073 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3074 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3075 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3076 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3077
3078 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3079 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3080 PropModeReplace, (unsigned char *)&thispid, 1);
3081
3082 xresettitle();
3083 XMapWindow(xw.dpy, xw.win);
3084 xhints();
3085 XSync(xw.dpy, False);
3086 }
3087
3088 void
3089 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3090 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3091 width = charlen * xw.cw, xp, i;
3092 int frcflags;
3093 int u8fl, u8fblen, u8cblen, doesexist;
3094 char *u8c, *u8fs;
3095 long unicodep;
3096 Font *font = &dc.font;
3097 FcResult fcres;
3098 FcPattern *fcpattern, *fontpattern;
3099 FcFontSet *fcsets[] = { NULL };
3100 FcCharSet *fccharset;
3101 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3102 XRenderColor colfg, colbg;
3103 XRectangle r;
3104 int oneatatime;
3105
3106 frcflags = FRC_NORMAL;
3107
3108 if(base.mode & ATTR_ITALIC) {
3109 if(base.fg == defaultfg)
3110 base.fg = defaultitalic;
3111 font = &dc.ifont;
3112 frcflags = FRC_ITALIC;
3113 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3114 if(base.fg == defaultfg)
3115 base.fg = defaultitalic;
3116 font = &dc.ibfont;
3117 frcflags = FRC_ITALICBOLD;
3118 } else if(base.mode & ATTR_UNDERLINE) {
3119 if(base.fg == defaultfg)
3120 base.fg = defaultunderline;
3121 }
3122
3123 if(IS_TRUECOL(base.fg)) {
3124 colfg.alpha = 0xffff;
3125 colfg.red = TRUERED(base.fg);
3126 colfg.green = TRUEGREEN(base.fg);
3127 colfg.blue = TRUEBLUE(base.fg);
3128 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3129 fg = &truefg;
3130 } else {
3131 fg = &dc.col[base.fg];
3132 }
3133
3134 if(IS_TRUECOL(base.bg)) {
3135 colbg.alpha = 0xffff;
3136 colbg.green = TRUEGREEN(base.bg);
3137 colbg.red = TRUERED(base.bg);
3138 colbg.blue = TRUEBLUE(base.bg);
3139 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3140 bg = &truebg;
3141 } else {
3142 bg = &dc.col[base.bg];
3143 }
3144
3145 if(base.mode & ATTR_BOLD) {
3146 if(BETWEEN(base.fg, 0, 7)) {
3147 /* basic system colors */
3148 fg = &dc.col[base.fg + 8];
3149 } else if(BETWEEN(base.fg, 16, 195)) {
3150 /* 256 colors */
3151 fg = &dc.col[base.fg + 36];
3152 } else if(BETWEEN(base.fg, 232, 251)) {
3153 /* greyscale */
3154 fg = &dc.col[base.fg + 4];
3155 }
3156 /*
3157 * Those ranges will not be brightened:
3158 * 8 - 15 – bright system colors
3159 * 196 - 231 – highest 256 color cube
3160 * 252 - 255 – brightest colors in greyscale
3161 */
3162 font = &dc.bfont;
3163 frcflags = FRC_BOLD;
3164 }
3165
3166 if(IS_SET(MODE_REVERSE)) {
3167 if(fg == &dc.col[defaultfg]) {
3168 fg = &dc.col[defaultbg];
3169 } else {
3170 colfg.red = ~fg->color.red;
3171 colfg.green = ~fg->color.green;
3172 colfg.blue = ~fg->color.blue;
3173 colfg.alpha = fg->color.alpha;
3174 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3175 &revfg);
3176 fg = &revfg;
3177 }
3178
3179 if(bg == &dc.col[defaultbg]) {
3180 bg = &dc.col[defaultfg];
3181 } else {
3182 colbg.red = ~bg->color.red;
3183 colbg.green = ~bg->color.green;
3184 colbg.blue = ~bg->color.blue;
3185 colbg.alpha = bg->color.alpha;
3186 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3187 &revbg);
3188 bg = &revbg;
3189 }
3190 }
3191
3192 if(base.mode & ATTR_REVERSE) {
3193 temp = fg;
3194 fg = bg;
3195 bg = temp;
3196 }
3197
3198 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3199 fg = bg;
3200
3201 /* Intelligent cleaning up of the borders. */
3202 if(x == 0) {
3203 xclear(0, (y == 0)? 0 : winy, borderpx,
3204 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3205 }
3206 if(x + charlen >= term.col) {
3207 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3208 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3209 }
3210 if(y == 0)
3211 xclear(winx, 0, winx + width, borderpx);
3212 if(y == term.row-1)
3213 xclear(winx, winy + xw.ch, winx + width, xw.h);
3214
3215 /* Clean up the region we want to draw to. */
3216 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3217
3218 /* Set the clip region because Xft is sometimes dirty. */
3219 r.x = 0;
3220 r.y = 0;
3221 r.height = xw.ch;
3222 r.width = width;
3223 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3224
3225 for(xp = winx; bytelen > 0;) {
3226 /*
3227 * Search for the range in the to be printed string of glyphs
3228 * that are in the main font. Then print that range. If
3229 * some glyph is found that is not in the font, do the
3230 * fallback dance.
3231 */
3232 u8fs = s;
3233 u8fblen = 0;
3234 u8fl = 0;
3235 oneatatime = font->width != xw.cw;
3236 for(;;) {
3237 u8c = s;
3238 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3239 s += u8cblen;
3240 bytelen -= u8cblen;
3241
3242 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3243 if(oneatatime || !doesexist || bytelen <= 0) {
3244 if(oneatatime || bytelen <= 0) {
3245 if(doesexist) {
3246 u8fl++;
3247 u8fblen += u8cblen;
3248 }
3249 }
3250
3251 if(u8fl > 0) {
3252 XftDrawStringUtf8(xw.draw, fg,
3253 font->match, xp,
3254 winy + font->ascent,
3255 (FcChar8 *)u8fs,
3256 u8fblen);
3257 xp += xw.cw * u8fl;
3258
3259 }
3260 break;
3261 }
3262
3263 u8fl++;
3264 u8fblen += u8cblen;
3265 }
3266 if(doesexist) {
3267 if(oneatatime)
3268 continue;
3269 break;
3270 }
3271
3272 /* Search the font cache. */
3273 for(i = 0; i < frclen; i++) {
3274 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3275 && frc[i].flags == frcflags) {
3276 break;
3277 }
3278 }
3279
3280 /* Nothing was found. */
3281 if(i >= frclen) {
3282 if(!font->set)
3283 xloadfontset(font);
3284 fcsets[0] = font->set;
3285
3286 /*
3287 * Nothing was found in the cache. Now use
3288 * some dozen of Fontconfig calls to get the
3289 * font for one single character.
3290 *
3291 * Xft and fontconfig are design failures.
3292 */
3293 fcpattern = FcPatternDuplicate(font->pattern);
3294 fccharset = FcCharSetCreate();
3295
3296 FcCharSetAddChar(fccharset, unicodep);
3297 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3298 fccharset);
3299 FcPatternAddBool(fcpattern, FC_SCALABLE,
3300 FcTrue);
3301
3302 FcConfigSubstitute(0, fcpattern,
3303 FcMatchPattern);
3304 FcDefaultSubstitute(fcpattern);
3305
3306 fontpattern = FcFontSetMatch(0, fcsets,
3307 FcTrue, fcpattern, &fcres);
3308
3309 /*
3310 * Overwrite or create the new cache entry.
3311 */
3312 if(frclen >= LEN(frc)) {
3313 frclen = LEN(frc) - 1;
3314 XftFontClose(xw.dpy, frc[frclen].font);
3315 }
3316
3317 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3318 fontpattern);
3319 frc[frclen].flags = frcflags;
3320
3321 i = frclen;
3322 frclen++;
3323
3324 FcPatternDestroy(fcpattern);
3325 FcCharSetDestroy(fccharset);
3326 }
3327
3328 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3329 xp, winy + frc[i].font->ascent,
3330 (FcChar8 *)u8c, u8cblen);
3331
3332 xp += xw.cw * wcwidth(unicodep);
3333 }
3334
3335 /*
3336 * This is how the loop above actually should be. Why does the
3337 * application have to care about font details?
3338 *
3339 * I have to repeat: Xft and Fontconfig are design failures.
3340 */
3341 /*
3342 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3343 winy + font->ascent, (FcChar8 *)s, bytelen);
3344 */
3345
3346 if(base.mode & ATTR_UNDERLINE) {
3347 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3348 width, 1);
3349 }
3350
3351 /* Reset clip to none. */
3352 XftDrawSetClip(xw.draw, 0);
3353 }
3354
3355 void
3356 xdrawcursor(void) {
3357 static int oldx = 0, oldy = 0;
3358 int sl, width, curx;
3359 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3360
3361 LIMIT(oldx, 0, term.col-1);
3362 LIMIT(oldy, 0, term.row-1);
3363
3364 curx = term.c.x;
3365
3366 /* adjust position if in dummy */
3367 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3368 oldx--;
3369 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3370 curx--;
3371
3372 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3373
3374 /* remove the old cursor */
3375 sl = utf8len(term.line[oldy][oldx].c);
3376 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3377 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3378 oldy, width, sl);
3379
3380 /* draw the new one */
3381 if(!(IS_SET(MODE_HIDE))) {
3382 if(xw.state & WIN_FOCUSED) {
3383 if(IS_SET(MODE_REVERSE)) {
3384 g.mode |= ATTR_REVERSE;
3385 g.fg = defaultcs;
3386 g.bg = defaultfg;
3387 }
3388
3389 sl = utf8len(g.c);
3390 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3391 ? 2 : 1;
3392 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3393 } else {
3394 XftDrawRect(xw.draw, &dc.col[defaultcs],
3395 borderpx + curx * xw.cw,
3396 borderpx + term.c.y * xw.ch,
3397 xw.cw - 1, 1);
3398 XftDrawRect(xw.draw, &dc.col[defaultcs],
3399 borderpx + curx * xw.cw,
3400 borderpx + term.c.y * xw.ch,
3401 1, xw.ch - 1);
3402 XftDrawRect(xw.draw, &dc.col[defaultcs],
3403 borderpx + (curx + 1) * xw.cw - 1,
3404 borderpx + term.c.y * xw.ch,
3405 1, xw.ch - 1);
3406 XftDrawRect(xw.draw, &dc.col[defaultcs],
3407 borderpx + curx * xw.cw,
3408 borderpx + (term.c.y + 1) * xw.ch - 1,
3409 xw.cw, 1);
3410 }
3411 oldx = curx, oldy = term.c.y;
3412 }
3413 }
3414
3415
3416 void
3417 xsettitle(char *p) {
3418 XTextProperty prop;
3419
3420 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3421 &prop);
3422 XSetWMName(xw.dpy, xw.win, &prop);
3423 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3424 XFree(prop.value);
3425 }
3426
3427 void
3428 xresettitle(void) {
3429 xsettitle(opt_title ? opt_title : "st");
3430 }
3431
3432 void
3433 redraw(int timeout) {
3434 struct timespec tv = {0, timeout * 1000};
3435
3436 draw();
3437
3438 if(timeout > 0) {
3439 nanosleep(&tv, NULL);
3440 XSync(xw.dpy, False); /* necessary for a good tput flash */
3441 }
3442 }
3443
3444 void
3445 draw(void) {
3446 drawregion(0, 0, term.col, term.row);
3447 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3448 xw.h, 0, 0);
3449 XSetForeground(xw.dpy, dc.gc,
3450 dc.col[IS_SET(MODE_REVERSE)?
3451 defaultfg : defaultbg].pixel);
3452 }
3453
3454 void
3455 drawregion(int x1, int y1, int x2, int y2) {
3456 int ic, ib, x, y, ox, sl;
3457 Glyph base, new;
3458 char buf[DRAW_BUF_SIZ];
3459 bool ena_sel = sel.ob.x != -1;
3460 long unicodep;
3461
3462 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3463 ena_sel = 0;
3464
3465 if(!(xw.state & WIN_VISIBLE))
3466 return;
3467
3468 for(y = y1; y < y2; y++) {
3469 if(!term.dirty[y])
3470 continue;
3471
3472 xtermclear(0, y, term.col, y);
3473 term.dirty[y] = 0;
3474 base = term.line[y][0];
3475 ic = ib = ox = 0;
3476 for(x = x1; x < x2; x++) {
3477 new = term.line[y][x];
3478 if(new.mode == ATTR_WDUMMY)
3479 continue;
3480 if(ena_sel && selected(x, y))
3481 new.mode ^= ATTR_REVERSE;
3482 if(ib > 0 && (ATTRCMP(base, new)
3483 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3484 xdraws(buf, base, ox, y, ic, ib);
3485 ic = ib = 0;
3486 }
3487 if(ib == 0) {
3488 ox = x;
3489 base = new;
3490 }
3491
3492 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3493 memcpy(buf+ib, new.c, sl);
3494 ib += sl;
3495 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3496 }
3497 if(ib > 0)
3498 xdraws(buf, base, ox, y, ic, ib);
3499 }
3500 xdrawcursor();
3501 }
3502
3503 void
3504 expose(XEvent *ev) {
3505 XExposeEvent *e = &ev->xexpose;
3506
3507 if(xw.state & WIN_REDRAW) {
3508 if(!e->count)
3509 xw.state &= ~WIN_REDRAW;
3510 }
3511 redraw(0);
3512 }
3513
3514 void
3515 visibility(XEvent *ev) {
3516 XVisibilityEvent *e = &ev->xvisibility;
3517
3518 if(e->state == VisibilityFullyObscured) {
3519 xw.state &= ~WIN_VISIBLE;
3520 } else if(!(xw.state & WIN_VISIBLE)) {
3521 /* need a full redraw for next Expose, not just a buf copy */
3522 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3523 }
3524 }
3525
3526 void
3527 unmap(XEvent *ev) {
3528 xw.state &= ~WIN_VISIBLE;
3529 }
3530
3531 void
3532 xsetpointermotion(int set) {
3533 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3534 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3535 }
3536
3537 void
3538 xseturgency(int add) {
3539 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3540
3541 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3542 XSetWMHints(xw.dpy, xw.win, h);
3543 XFree(h);
3544 }
3545
3546 void
3547 focus(XEvent *ev) {
3548 XFocusChangeEvent *e = &ev->xfocus;
3549
3550 if(e->mode == NotifyGrab)
3551 return;
3552
3553 if(ev->type == FocusIn) {
3554 XSetICFocus(xw.xic);
3555 xw.state |= WIN_FOCUSED;
3556 xseturgency(0);
3557 if(IS_SET(MODE_FOCUS))
3558 ttywrite("\033[I", 3);
3559 } else {
3560 XUnsetICFocus(xw.xic);
3561 xw.state &= ~WIN_FOCUSED;
3562 if(IS_SET(MODE_FOCUS))
3563 ttywrite("\033[O", 3);
3564 }
3565 }
3566
3567 static inline bool
3568 match(uint mask, uint state) {
3569 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3570 }
3571
3572 void
3573 numlock(const Arg *dummy) {
3574 term.numlock ^= 1;
3575 }
3576
3577 char*
3578 kmap(KeySym k, uint state) {
3579 Key *kp;
3580 int i;
3581
3582 /* Check for mapped keys out of X11 function keys. */
3583 for(i = 0; i < LEN(mappedkeys); i++) {
3584 if(mappedkeys[i] == k)
3585 break;
3586 }
3587 if(i == LEN(mappedkeys)) {
3588 if((k & 0xFFFF) < 0xFD00)
3589 return NULL;
3590 }
3591
3592 for(kp = key; kp < key + LEN(key); kp++) {
3593 if(kp->k != k)
3594 continue;
3595
3596 if(!match(kp->mask, state))
3597 continue;
3598
3599 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3600 continue;
3601 if(term.numlock && kp->appkey == 2)
3602 continue;
3603
3604 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3605 continue;
3606
3607 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3608 continue;
3609
3610 return kp->s;
3611 }
3612
3613 return NULL;
3614 }
3615
3616 void
3617 kpress(XEvent *ev) {
3618 XKeyEvent *e = &ev->xkey;
3619 KeySym ksym;
3620 char buf[32], *customkey;
3621 int len;
3622 long c;
3623 Status status;
3624 Shortcut *bp;
3625
3626 if(IS_SET(MODE_KBDLOCK))
3627 return;
3628
3629 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3630 /* 1. shortcuts */
3631 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3632 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3633 bp->func(&(bp->arg));
3634 return;
3635 }
3636 }
3637
3638 /* 2. custom keys from config.h */
3639 if((customkey = kmap(ksym, e->state))) {
3640 ttysend(customkey, strlen(customkey));
3641 return;
3642 }
3643
3644 /* 3. composed string from input method */
3645 if(len == 0)
3646 return;
3647 if(len == 1 && e->state & Mod1Mask) {
3648 if(IS_SET(MODE_8BIT)) {
3649 if(*buf < 0177) {
3650 c = *buf | 0x80;
3651 len = utf8encode(c, buf, UTF_SIZ);
3652 }
3653 } else {
3654 buf[1] = buf[0];
3655 buf[0] = '\033';
3656 len = 2;
3657 }
3658 }
3659 ttysend(buf, len);
3660 }
3661
3662
3663 void
3664 cmessage(XEvent *e) {
3665 /*
3666 * See xembed specs
3667 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3668 */
3669 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3670 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3671 xw.state |= WIN_FOCUSED;
3672 xseturgency(0);
3673 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3674 xw.state &= ~WIN_FOCUSED;
3675 }
3676 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3677 /* Send SIGHUP to shell */
3678 kill(pid, SIGHUP);
3679 exit(EXIT_SUCCESS);
3680 }
3681 }
3682
3683 void
3684 cresize(int width, int height) {
3685 int col, row;
3686
3687 if(width != 0)
3688 xw.w = width;
3689 if(height != 0)
3690 xw.h = height;
3691
3692 col = (xw.w - 2 * borderpx) / xw.cw;
3693 row = (xw.h - 2 * borderpx) / xw.ch;
3694
3695 tresize(col, row);
3696 xresize(col, row);
3697 ttyresize();
3698 }
3699
3700 void
3701 resize(XEvent *e) {
3702 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3703 return;
3704
3705 cresize(e->xconfigure.width, e->xconfigure.height);
3706 }
3707
3708 void
3709 run(void) {
3710 XEvent ev;
3711 int w = xw.w, h = xw.h;
3712 fd_set rfd;
3713 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3714 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3715
3716 /* Waiting for window mapping */
3717 while(1) {
3718 XNextEvent(xw.dpy, &ev);
3719 if(ev.type == ConfigureNotify) {
3720 w = ev.xconfigure.width;
3721 h = ev.xconfigure.height;
3722 } else if(ev.type == MapNotify) {
3723 break;
3724 }
3725 }
3726
3727 ttynew();
3728 if(!xw.isfixed)
3729 cresize(w, h);
3730 else
3731 cresize(xw.fw, xw.fh);
3732
3733 gettimeofday(&last, NULL);
3734 lastblink = last;
3735
3736 for(xev = actionfps;;) {
3737 long deltatime;
3738
3739 FD_ZERO(&rfd);
3740 FD_SET(cmdfd, &rfd);
3741 FD_SET(xfd, &rfd);
3742
3743 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3744 if(errno == EINTR)
3745 continue;
3746 die("select failed: %s\n", strerror(errno));
3747 }
3748 if(FD_ISSET(cmdfd, &rfd)) {
3749 ttyread();
3750 if(blinktimeout) {
3751 blinkset = tattrset(ATTR_BLINK);
3752 if(!blinkset)
3753 MODBIT(term.mode, 0, MODE_BLINK);
3754 }
3755 }
3756
3757 if(FD_ISSET(xfd, &rfd))
3758 xev = actionfps;
3759
3760 gettimeofday(&now, NULL);
3761 drawtimeout.tv_sec = 0;
3762 drawtimeout.tv_usec = (1000/xfps) * 1000;
3763 tv = &drawtimeout;
3764
3765 dodraw = 0;
3766 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3767 tsetdirtattr(ATTR_BLINK);
3768 term.mode ^= MODE_BLINK;
3769 lastblink = now;
3770 dodraw = 1;
3771 }
3772 deltatime = TIMEDIFF(now, last);
3773 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3774 || deltatime < 0) {
3775 dodraw = 1;
3776 last = now;
3777 }
3778
3779 if(dodraw) {
3780 while(XPending(xw.dpy)) {
3781 XNextEvent(xw.dpy, &ev);
3782 if(XFilterEvent(&ev, None))
3783 continue;
3784 if(handler[ev.type])
3785 (handler[ev.type])(&ev);
3786 }
3787
3788 draw();
3789 XFlush(xw.dpy);
3790
3791 if(xev && !FD_ISSET(xfd, &rfd))
3792 xev--;
3793 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3794 if(blinkset) {
3795 if(TIMEDIFF(now, lastblink) \
3796 > blinktimeout) {
3797 drawtimeout.tv_usec = 1;
3798 } else {
3799 drawtimeout.tv_usec = (1000 * \
3800 (blinktimeout - \
3801 TIMEDIFF(now,
3802 lastblink)));
3803 }
3804 } else {
3805 tv = NULL;
3806 }
3807 }
3808 }
3809 }
3810 }
3811
3812 void
3813 usage(void) {
3814 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3815 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3816 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3817 }
3818
3819 int
3820 main(int argc, char *argv[]) {
3821 int bitm, xr, yr;
3822 uint wr, hr;
3823 char *titles;
3824
3825 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3826 xw.isfixed = False;
3827
3828 ARGBEGIN {
3829 case 'a':
3830 allowaltscreen = false;
3831 break;
3832 case 'c':
3833 opt_class = EARGF(usage());
3834 break;
3835 case 'e':
3836 /* eat all remaining arguments */
3837 if(argc > 1) {
3838 opt_cmd = &argv[1];
3839 if(argv[1] != NULL && opt_title == NULL) {
3840 titles = xstrdup(argv[1]);
3841 opt_title = basename(titles);
3842 }
3843 }
3844 goto run;
3845 case 'f':
3846 opt_font = EARGF(usage());
3847 break;
3848 case 'g':
3849 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3850 if(bitm & XValue)
3851 xw.fx = xr;
3852 if(bitm & YValue)
3853 xw.fy = yr;
3854 if(bitm & WidthValue)
3855 xw.fw = (int)wr;
3856 if(bitm & HeightValue)
3857 xw.fh = (int)hr;
3858 if(bitm & XNegative && xw.fx == 0)
3859 xw.fx = -1;
3860 if(bitm & YNegative && xw.fy == 0)
3861 xw.fy = -1;
3862
3863 if(xw.fh != 0 && xw.fw != 0)
3864 xw.isfixed = True;
3865 break;
3866 case 'o':
3867 opt_io = EARGF(usage());
3868 break;
3869 case 't':
3870 opt_title = EARGF(usage());
3871 break;
3872 case 'w':
3873 opt_embed = EARGF(usage());
3874 break;
3875 case 'v':
3876 default:
3877 usage();
3878 } ARGEND;
3879
3880 run:
3881 setlocale(LC_CTYPE, "");
3882 XSetLocaleModifiers("");
3883 tnew(80, 24);
3884 xinit();
3885 selinit();
3886 run();
3887
3888 return 0;
3889 }
3890