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Improve execsh() and don't allow anonymous shells
[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 ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
74 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
75 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
80 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
81
82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
83 #define IS_TRUECOL(x) (1 << 24 & (x))
84 #define TRUERED(x) (((x) & 0xff0000) >> 8)
85 #define TRUEGREEN(x) (((x) & 0xff00))
86 #define TRUEBLUE(x) (((x) & 0xff) << 8)
87
88
89 enum glyph_attribute {
90 ATTR_NULL = 0,
91 ATTR_BOLD = 1,
92 ATTR_FAINT = 2,
93 ATTR_ITALIC = 4,
94 ATTR_UNDERLINE = 8,
95 ATTR_BLINK = 16,
96 ATTR_REVERSE = 32,
97 ATTR_INVISIBLE = 64,
98 ATTR_STRUCK = 128,
99 ATTR_WRAP = 256,
100 ATTR_WIDE = 512,
101 ATTR_WDUMMY = 1024,
102 };
103
104 enum cursor_movement {
105 CURSOR_SAVE,
106 CURSOR_LOAD
107 };
108
109 enum cursor_state {
110 CURSOR_DEFAULT = 0,
111 CURSOR_WRAPNEXT = 1,
112 CURSOR_ORIGIN = 2
113 };
114
115 enum term_mode {
116 MODE_WRAP = 1,
117 MODE_INSERT = 2,
118 MODE_APPKEYPAD = 4,
119 MODE_ALTSCREEN = 8,
120 MODE_CRLF = 16,
121 MODE_MOUSEBTN = 32,
122 MODE_MOUSEMOTION = 64,
123 MODE_REVERSE = 128,
124 MODE_KBDLOCK = 256,
125 MODE_HIDE = 512,
126 MODE_ECHO = 1024,
127 MODE_APPCURSOR = 2048,
128 MODE_MOUSESGR = 4096,
129 MODE_8BIT = 8192,
130 MODE_BLINK = 16384,
131 MODE_FBLINK = 32768,
132 MODE_FOCUS = 65536,
133 MODE_MOUSEX10 = 131072,
134 MODE_MOUSEMANY = 262144,
135 MODE_BRCKTPASTE = 524288,
136 MODE_PRINT = 1048576,
137 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
138 |MODE_MOUSEMANY,
139 };
140
141 enum charset {
142 CS_GRAPHIC0,
143 CS_GRAPHIC1,
144 CS_UK,
145 CS_USA,
146 CS_MULTI,
147 CS_GER,
148 CS_FIN
149 };
150
151 enum escape_state {
152 ESC_START = 1,
153 ESC_CSI = 2,
154 ESC_STR = 4, /* DCS, OSC, PM, APC */
155 ESC_ALTCHARSET = 8,
156 ESC_STR_END = 16, /* a final string was encountered */
157 ESC_TEST = 32, /* Enter in test mode */
158 };
159
160 enum window_state {
161 WIN_VISIBLE = 1,
162 WIN_REDRAW = 2,
163 WIN_FOCUSED = 4
164 };
165
166 enum selection_type {
167 SEL_REGULAR = 1,
168 SEL_RECTANGULAR = 2
169 };
170
171 enum selection_snap {
172 SNAP_WORD = 1,
173 SNAP_LINE = 2
174 };
175
176 typedef unsigned char uchar;
177 typedef unsigned int uint;
178 typedef unsigned long ulong;
179 typedef unsigned short ushort;
180
181 typedef XftDraw *Draw;
182 typedef XftColor Color;
183
184 typedef struct {
185 char c[UTF_SIZ]; /* character code */
186 ushort mode; /* attribute flags */
187 uint32_t fg; /* foreground */
188 uint32_t bg; /* background */
189 } Glyph;
190
191 typedef Glyph *Line;
192
193 typedef struct {
194 Glyph attr; /* current char attributes */
195 int x;
196 int y;
197 char state;
198 } TCursor;
199
200 /* CSI Escape sequence structs */
201 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
202 typedef struct {
203 char buf[ESC_BUF_SIZ]; /* raw string */
204 int len; /* raw string length */
205 char priv;
206 int arg[ESC_ARG_SIZ];
207 int narg; /* nb of args */
208 char mode;
209 } CSIEscape;
210
211 /* STR Escape sequence structs */
212 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
213 typedef struct {
214 char type; /* ESC type ... */
215 char buf[STR_BUF_SIZ]; /* raw string */
216 int len; /* raw string length */
217 char *args[STR_ARG_SIZ];
218 int narg; /* nb of args */
219 } STREscape;
220
221 /* Internal representation of the screen */
222 typedef struct {
223 int row; /* nb row */
224 int col; /* nb col */
225 Line *line; /* screen */
226 Line *alt; /* alternate screen */
227 bool *dirty; /* dirtyness of lines */
228 TCursor c; /* cursor */
229 int top; /* top scroll limit */
230 int bot; /* bottom scroll limit */
231 int mode; /* terminal mode flags */
232 int esc; /* escape state flags */
233 char trantbl[4]; /* charset table translation */
234 int charset; /* current charset */
235 int icharset; /* selected charset for sequence */
236 bool numlock; /* lock numbers in keyboard */
237 bool *tabs;
238 } Term;
239
240 /* Purely graphic info */
241 typedef struct {
242 Display *dpy;
243 Colormap cmap;
244 Window win;
245 Drawable buf;
246 Atom xembed, wmdeletewin, netwmname, netwmpid;
247 XIM xim;
248 XIC xic;
249 Draw draw;
250 Visual *vis;
251 XSetWindowAttributes attrs;
252 int scr;
253 bool isfixed; /* is fixed geometry? */
254 int l, t; /* left and top offset */
255 int gm; /* geometry mask */
256 int tw, th; /* tty width and height */
257 int w, h; /* window width and height */
258 int ch; /* char height */
259 int cw; /* char width */
260 char state; /* focus, redraw, visible */
261 } XWindow;
262
263 typedef struct {
264 uint b;
265 uint mask;
266 char *s;
267 } Mousekey;
268
269 typedef struct {
270 KeySym k;
271 uint mask;
272 char *s;
273 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
274 signed char appkey; /* application keypad */
275 signed char appcursor; /* application cursor */
276 signed char crlf; /* crlf mode */
277 } Key;
278
279 typedef struct {
280 int mode;
281 int type;
282 int snap;
283 /*
284 * Selection variables:
285 * nb – normalized coordinates of the beginning of the selection
286 * ne – normalized coordinates of the end of the selection
287 * ob – original coordinates of the beginning of the selection
288 * oe – original coordinates of the end of the selection
289 */
290 struct {
291 int x, y;
292 } nb, ne, ob, oe;
293
294 char *clip;
295 Atom xtarget;
296 bool alt;
297 struct timespec tclick1;
298 struct timespec tclick2;
299 } Selection;
300
301 typedef union {
302 int i;
303 uint ui;
304 float f;
305 const void *v;
306 } Arg;
307
308 typedef struct {
309 uint mod;
310 KeySym keysym;
311 void (*func)(const Arg *);
312 const Arg arg;
313 } Shortcut;
314
315 /* function definitions used in config.h */
316 static void clippaste(const Arg *);
317 static void numlock(const Arg *);
318 static void selpaste(const Arg *);
319 static void xzoom(const Arg *);
320 static void printsel(const Arg *);
321 static void printscreen(const Arg *) ;
322 static void toggleprinter(const Arg *);
323
324 /* Config.h for applying patches and the configuration. */
325 #include "config.h"
326
327 /* Font structure */
328 typedef struct {
329 int height;
330 int width;
331 int ascent;
332 int descent;
333 short lbearing;
334 short rbearing;
335 XftFont *match;
336 FcFontSet *set;
337 FcPattern *pattern;
338 } Font;
339
340 /* Drawing Context */
341 typedef struct {
342 Color col[MAX(LEN(colorname), 256)];
343 Font font, bfont, ifont, ibfont;
344 GC gc;
345 } DC;
346
347 static void die(const char *, ...);
348 static void draw(void);
349 static void redraw(int);
350 static void drawregion(int, int, int, int);
351 static void execsh(void);
352 static void sigchld(int);
353 static void run(void);
354
355 static void csidump(void);
356 static void csihandle(void);
357 static void csiparse(void);
358 static void csireset(void);
359 static void strdump(void);
360 static void strhandle(void);
361 static void strparse(void);
362 static void strreset(void);
363
364 static int tattrset(int);
365 static void tprinter(char *, size_t);
366 static void tdumpsel(void);
367 static void tdumpline(int);
368 static void tdump(void);
369 static void tclearregion(int, int, int, int);
370 static void tcursor(int);
371 static void tdeletechar(int);
372 static void tdeleteline(int);
373 static void tinsertblank(int);
374 static void tinsertblankline(int);
375 static int tlinelen(int);
376 static void tmoveto(int, int);
377 static void tmoveato(int, int);
378 static void tnew(int, int);
379 static void tnewline(int);
380 static void tputtab(int);
381 static void tputc(char *, int);
382 static void treset(void);
383 static void tresize(int, int);
384 static void tscrollup(int, int);
385 static void tscrolldown(int, int);
386 static void tsetattr(int *, int);
387 static void tsetchar(char *, Glyph *, int, int);
388 static void tsetscroll(int, int);
389 static void tswapscreen(void);
390 static void tsetdirt(int, int);
391 static void tsetdirtattr(int);
392 static void tsetmode(bool, bool, int *, int);
393 static void tfulldirt(void);
394 static void techo(char *, int);
395 static void tcontrolcode(uchar );
396 static void tdectest(char );
397 static int32_t tdefcolor(int *, int *, int);
398 static void tdeftran(char);
399 static inline bool match(uint, uint);
400 static void ttynew(void);
401 static void ttyread(void);
402 static void ttyresize(void);
403 static void ttysend(char *, size_t);
404 static void ttywrite(const char *, size_t);
405 static void tstrsequence(uchar c);
406
407 static void xdraws(char *, Glyph, int, int, int, int);
408 static void xhints(void);
409 static void xclear(int, int, int, int);
410 static void xdrawcursor(void);
411 static void xinit(void);
412 static void xloadcols(void);
413 static int xsetcolorname(int, const char *);
414 static int xgeommasktogravity(int);
415 static int xloadfont(Font *, FcPattern *);
416 static void xloadfonts(char *, double);
417 static int xloadfontset(Font *);
418 static void xsettitle(char *);
419 static void xresettitle(void);
420 static void xsetpointermotion(int);
421 static void xseturgency(int);
422 static void xsetsel(char *);
423 static void xtermclear(int, int, int, int);
424 static void xunloadfont(Font *);
425 static void xunloadfonts(void);
426 static void xresize(int, int);
427
428 static void expose(XEvent *);
429 static void visibility(XEvent *);
430 static void unmap(XEvent *);
431 static char *kmap(KeySym, uint);
432 static void kpress(XEvent *);
433 static void cmessage(XEvent *);
434 static void cresize(int, int);
435 static void resize(XEvent *);
436 static void focus(XEvent *);
437 static void brelease(XEvent *);
438 static void bpress(XEvent *);
439 static void bmotion(XEvent *);
440 static void selnotify(XEvent *);
441 static void selclear(XEvent *);
442 static void selrequest(XEvent *);
443
444 static void selinit(void);
445 static void selnormalize(void);
446 static inline bool selected(int, int);
447 static char *getsel(void);
448 static void selcopy(void);
449 static void selscroll(int, int);
450 static void selsnap(int, int *, int *, int);
451 static void getbuttoninfo(XEvent *);
452 static void mousereport(XEvent *);
453
454 static size_t utf8decode(char *, long *, size_t);
455 static long utf8decodebyte(char, size_t *);
456 static size_t utf8encode(long, char *, size_t);
457 static char utf8encodebyte(long, size_t);
458 static size_t utf8len(char *);
459 static size_t utf8validate(long *, size_t);
460
461 static ssize_t xwrite(int, const char *, size_t);
462 static void *xmalloc(size_t);
463 static void *xrealloc(void *, size_t);
464 static char *xstrdup(char *);
465
466 static void usage(void);
467
468 static void (*handler[LASTEvent])(XEvent *) = {
469 [KeyPress] = kpress,
470 [ClientMessage] = cmessage,
471 [ConfigureNotify] = resize,
472 [VisibilityNotify] = visibility,
473 [UnmapNotify] = unmap,
474 [Expose] = expose,
475 [FocusIn] = focus,
476 [FocusOut] = focus,
477 [MotionNotify] = bmotion,
478 [ButtonPress] = bpress,
479 [ButtonRelease] = brelease,
480 [SelectionClear] = selclear,
481 [SelectionNotify] = selnotify,
482 [SelectionRequest] = selrequest,
483 };
484
485 /* Globals */
486 static DC dc;
487 static XWindow xw;
488 static Term term;
489 static CSIEscape csiescseq;
490 static STREscape strescseq;
491 static int cmdfd;
492 static pid_t pid;
493 static Selection sel;
494 static int iofd = STDOUT_FILENO;
495 static char **opt_cmd = NULL;
496 static char *opt_io = NULL;
497 static char *opt_title = NULL;
498 static char *opt_embed = NULL;
499 static char *opt_class = NULL;
500 static char *opt_font = NULL;
501 static int oldbutton = 3; /* button event on startup: 3 = release */
502
503 static char *usedfont = NULL;
504 static double usedfontsize = 0;
505
506 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
507 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
508 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
509 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
510
511 /* Font Ring Cache */
512 enum {
513 FRC_NORMAL,
514 FRC_ITALIC,
515 FRC_BOLD,
516 FRC_ITALICBOLD
517 };
518
519 typedef struct {
520 XftFont *font;
521 int flags;
522 } Fontcache;
523
524 /* Fontcache is an array now. A new font will be appended to the array. */
525 static Fontcache frc[16];
526 static int frclen = 0;
527
528 ssize_t
529 xwrite(int fd, const char *s, size_t len) {
530 size_t aux = len;
531
532 while(len > 0) {
533 ssize_t r = write(fd, s, len);
534 if(r < 0)
535 return r;
536 len -= r;
537 s += r;
538 }
539 return aux;
540 }
541
542 void *
543 xmalloc(size_t len) {
544 void *p = malloc(len);
545
546 if(!p)
547 die("Out of memory\n");
548
549 return p;
550 }
551
552 void *
553 xrealloc(void *p, size_t len) {
554 if((p = realloc(p, len)) == NULL)
555 die("Out of memory\n");
556
557 return p;
558 }
559
560 char *
561 xstrdup(char *s) {
562 if((s = strdup(s)) == NULL)
563 die("Out of memory\n");
564
565 return s;
566 }
567
568 size_t
569 utf8decode(char *c, long *u, size_t clen) {
570 size_t i, j, len, type;
571 long udecoded;
572
573 *u = UTF_INVALID;
574 if(!clen)
575 return 0;
576 udecoded = utf8decodebyte(c[0], &len);
577 if(!BETWEEN(len, 1, UTF_SIZ))
578 return 1;
579 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
580 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
581 if(type != 0)
582 return j;
583 }
584 if(j < len)
585 return 0;
586 *u = udecoded;
587 utf8validate(u, len);
588 return len;
589 }
590
591 long
592 utf8decodebyte(char c, size_t *i) {
593 for(*i = 0; *i < LEN(utfmask); ++(*i))
594 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
595 return (uchar)c & ~utfmask[*i];
596 return 0;
597 }
598
599 size_t
600 utf8encode(long u, char *c, size_t clen) {
601 size_t len, i;
602
603 len = utf8validate(&u, 0);
604 if(clen < len)
605 return 0;
606 for(i = len - 1; i != 0; --i) {
607 c[i] = utf8encodebyte(u, 0);
608 u >>= 6;
609 }
610 c[0] = utf8encodebyte(u, len);
611 return len;
612 }
613
614 char
615 utf8encodebyte(long u, size_t i) {
616 return utfbyte[i] | (u & ~utfmask[i]);
617 }
618
619 size_t
620 utf8len(char *c) {
621 return utf8decode(c, &(long){0}, UTF_SIZ);
622 }
623
624 size_t
625 utf8validate(long *u, size_t i) {
626 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
627 *u = UTF_INVALID;
628 for(i = 1; *u > utfmax[i]; ++i)
629 ;
630 return i;
631 }
632
633 static void
634 selinit(void) {
635 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
636 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
637 sel.mode = 0;
638 sel.ob.x = -1;
639 sel.clip = NULL;
640 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
641 if(sel.xtarget == None)
642 sel.xtarget = XA_STRING;
643 }
644
645 static int
646 x2col(int x) {
647 x -= borderpx;
648 x /= xw.cw;
649
650 return LIMIT(x, 0, term.col-1);
651 }
652
653 static int
654 y2row(int y) {
655 y -= borderpx;
656 y /= xw.ch;
657
658 return LIMIT(y, 0, term.row-1);
659 }
660
661 static int tlinelen(int y) {
662 int i = term.col;
663
664 while (i > 0 && term.line[y][i - 1].c[0] == ' ')
665 --i;
666
667 return i;
668 }
669
670 static void
671 selnormalize(void) {
672 int i;
673
674 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
675 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
676 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
677 } else {
678 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
679 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
680 }
681 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
682 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
683
684 /* expand selection over line breaks */
685 if (sel.type == SEL_RECTANGULAR)
686 return;
687 i = tlinelen(sel.nb.y);
688 if (i < sel.nb.x)
689 sel.nb.x = i;
690 if (tlinelen(sel.ne.y) <= sel.ne.x)
691 sel.ne.x = term.col - 1;
692 }
693
694 static inline bool
695 selected(int x, int y) {
696 if(sel.type == SEL_RECTANGULAR)
697 return BETWEEN(y, sel.nb.y, sel.ne.y)
698 && BETWEEN(x, sel.nb.x, sel.ne.x);
699
700 return BETWEEN(y, sel.nb.y, sel.ne.y)
701 && (y != sel.nb.y || x >= sel.nb.x)
702 && (y != sel.ne.y || x <= sel.ne.x);
703 }
704
705 void
706 selsnap(int mode, int *x, int *y, int direction) {
707 int newx, newy, xt, yt;
708 Glyph *gp;
709
710 switch(mode) {
711 case SNAP_WORD:
712 /*
713 * Snap around if the word wraps around at the end or
714 * beginning of a line.
715 */
716 for(;;) {
717 newx = *x + direction;
718 newy = *y;
719 if(!BETWEEN(newx, 0, term.col - 1)) {
720 newy += direction;
721 newx = (newx + term.col) % term.col;
722 if (!BETWEEN(newy, 0, term.row - 1))
723 break;
724
725 if(direction > 0)
726 yt = *y, xt = *x;
727 else
728 yt = newy, xt = newx;
729 if(!(term.line[yt][xt].mode & ATTR_WRAP))
730 break;
731 }
732
733 if (newx >= tlinelen(newy))
734 break;
735
736 gp = &term.line[newy][newx];
737 if (!(gp->mode & ATTR_WDUMMY) && strchr(worddelimiters, gp->c[0]))
738 break;
739
740 *x = newx;
741 *y = newy;
742 }
743 break;
744 case SNAP_LINE:
745 /*
746 * Snap around if the the previous line or the current one
747 * has set ATTR_WRAP at its end. Then the whole next or
748 * previous line will be selected.
749 */
750 *x = (direction < 0) ? 0 : term.col - 1;
751 if(direction < 0 && *y > 0) {
752 for(; *y > 0; *y += direction) {
753 if(!(term.line[*y-1][term.col-1].mode
754 & ATTR_WRAP)) {
755 break;
756 }
757 }
758 } else if(direction > 0 && *y < term.row-1) {
759 for(; *y < term.row; *y += direction) {
760 if(!(term.line[*y][term.col-1].mode
761 & ATTR_WRAP)) {
762 break;
763 }
764 }
765 }
766 break;
767 }
768 }
769
770 void
771 getbuttoninfo(XEvent *e) {
772 int type;
773 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
774
775 sel.alt = IS_SET(MODE_ALTSCREEN);
776
777 sel.oe.x = x2col(e->xbutton.x);
778 sel.oe.y = y2row(e->xbutton.y);
779
780 if(sel.ob.y < sel.oe.y
781 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
782 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
783 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
784 } else {
785 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
786 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
787 }
788 selnormalize();
789
790 sel.type = SEL_REGULAR;
791 for(type = 1; type < LEN(selmasks); ++type) {
792 if(match(selmasks[type], state)) {
793 sel.type = type;
794 break;
795 }
796 }
797 }
798
799 void
800 mousereport(XEvent *e) {
801 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
802 button = e->xbutton.button, state = e->xbutton.state,
803 len;
804 char buf[40];
805 static int ox, oy;
806
807 /* from urxvt */
808 if(e->xbutton.type == MotionNotify) {
809 if(x == ox && y == oy)
810 return;
811 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
812 return;
813 /* MOUSE_MOTION: no reporting if no button is pressed */
814 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
815 return;
816
817 button = oldbutton + 32;
818 ox = x;
819 oy = y;
820 } else {
821 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
822 button = 3;
823 } else {
824 button -= Button1;
825 if(button >= 3)
826 button += 64 - 3;
827 }
828 if(e->xbutton.type == ButtonPress) {
829 oldbutton = button;
830 ox = x;
831 oy = y;
832 } else if(e->xbutton.type == ButtonRelease) {
833 oldbutton = 3;
834 /* MODE_MOUSEX10: no button release reporting */
835 if(IS_SET(MODE_MOUSEX10))
836 return;
837 if (button == 64 || button == 65)
838 return;
839 }
840 }
841
842 if(!IS_SET(MODE_MOUSEX10)) {
843 button += (state & ShiftMask ? 4 : 0)
844 + (state & Mod4Mask ? 8 : 0)
845 + (state & ControlMask ? 16 : 0);
846 }
847
848 len = 0;
849 if(IS_SET(MODE_MOUSESGR)) {
850 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
851 button, x+1, y+1,
852 e->xbutton.type == ButtonRelease ? 'm' : 'M');
853 } else if(x < 223 && y < 223) {
854 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
855 32+button, 32+x+1, 32+y+1);
856 } else {
857 return;
858 }
859
860 ttywrite(buf, len);
861 }
862
863 void
864 bpress(XEvent *e) {
865 struct timespec now;
866 Mousekey *mk;
867
868 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
869 mousereport(e);
870 return;
871 }
872
873 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
874 if(e->xbutton.button == mk->b
875 && match(mk->mask, e->xbutton.state)) {
876 ttysend(mk->s, strlen(mk->s));
877 return;
878 }
879 }
880
881 if(e->xbutton.button == Button1) {
882 clock_gettime(CLOCK_MONOTONIC, &now);
883
884 /* Clear previous selection, logically and visually. */
885 selclear(NULL);
886 sel.mode = 1;
887 sel.type = SEL_REGULAR;
888 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
889 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
890
891 /*
892 * If the user clicks below predefined timeouts specific
893 * snapping behaviour is exposed.
894 */
895 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
896 sel.snap = SNAP_LINE;
897 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
898 sel.snap = SNAP_WORD;
899 } else {
900 sel.snap = 0;
901 }
902 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
903 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
904 selnormalize();
905
906 /*
907 * Draw selection, unless it's regular and we don't want to
908 * make clicks visible
909 */
910 if(sel.snap != 0) {
911 sel.mode++;
912 tsetdirt(sel.nb.y, sel.ne.y);
913 }
914 sel.tclick2 = sel.tclick1;
915 sel.tclick1 = now;
916 }
917 }
918
919 char *
920 getsel(void) {
921 char *str, *ptr;
922 int y, bufsize, size, lastx, linelen;
923 Glyph *gp, *last;
924
925 if(sel.ob.x == -1)
926 return NULL;
927
928 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
929 ptr = str = xmalloc(bufsize);
930
931 /* append every set & selected glyph to the selection */
932 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
933 linelen = tlinelen(y);
934
935 if(sel.type == SEL_RECTANGULAR) {
936 gp = &term.line[y][sel.nb.x];
937 lastx = sel.ne.x;
938 } else {
939 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
940 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
941 }
942 last = &term.line[y][MIN(lastx, linelen-1)];
943
944 for( ; gp <= last; ++gp) {
945 if(gp->mode & ATTR_WDUMMY)
946 continue;
947
948 size = utf8len(gp->c);
949 memcpy(ptr, gp->c, size);
950 ptr += size;
951 }
952
953 /*
954 * Copy and pasting of line endings is inconsistent
955 * in the inconsistent terminal and GUI world.
956 * The best solution seems like to produce '\n' when
957 * something is copied from st and convert '\n' to
958 * '\r', when something to be pasted is received by
959 * st.
960 * FIXME: Fix the computer world.
961 */
962 if(sel.ne.y > y || lastx >= linelen)
963 *ptr++ = '\n';
964 }
965 *ptr = 0;
966 return str;
967 }
968
969 void
970 selcopy(void) {
971 xsetsel(getsel());
972 }
973
974 void
975 selnotify(XEvent *e) {
976 ulong nitems, ofs, rem;
977 int format;
978 uchar *data, *last, *repl;
979 Atom type;
980
981 ofs = 0;
982 do {
983 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
984 False, AnyPropertyType, &type, &format,
985 &nitems, &rem, &data)) {
986 fprintf(stderr, "Clipboard allocation failed\n");
987 return;
988 }
989
990 /*
991 * As seen in getsel:
992 * Line endings are inconsistent in the terminal and GUI world
993 * copy and pasting. When receiving some selection data,
994 * replace all '\n' with '\r'.
995 * FIXME: Fix the computer world.
996 */
997 repl = data;
998 last = data + nitems * format / 8;
999 while((repl = memchr(repl, '\n', last - repl))) {
1000 *repl++ = '\r';
1001 }
1002
1003 if(IS_SET(MODE_BRCKTPASTE))
1004 ttywrite("\033[200~", 6);
1005 ttysend((char *)data, nitems * format / 8);
1006 if(IS_SET(MODE_BRCKTPASTE))
1007 ttywrite("\033[201~", 6);
1008 XFree(data);
1009 /* number of 32-bit chunks returned */
1010 ofs += nitems * format / 32;
1011 } while(rem > 0);
1012 }
1013
1014 void
1015 selpaste(const Arg *dummy) {
1016 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1017 xw.win, CurrentTime);
1018 }
1019
1020 void
1021 clippaste(const Arg *dummy) {
1022 Atom clipboard;
1023
1024 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1025 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1026 xw.win, CurrentTime);
1027 }
1028
1029 void
1030 selclear(XEvent *e) {
1031 if(sel.ob.x == -1)
1032 return;
1033 sel.ob.x = -1;
1034 tsetdirt(sel.nb.y, sel.ne.y);
1035 }
1036
1037 void
1038 selrequest(XEvent *e) {
1039 XSelectionRequestEvent *xsre;
1040 XSelectionEvent xev;
1041 Atom xa_targets, string;
1042
1043 xsre = (XSelectionRequestEvent *) e;
1044 xev.type = SelectionNotify;
1045 xev.requestor = xsre->requestor;
1046 xev.selection = xsre->selection;
1047 xev.target = xsre->target;
1048 xev.time = xsre->time;
1049 /* reject */
1050 xev.property = None;
1051
1052 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1053 if(xsre->target == xa_targets) {
1054 /* respond with the supported type */
1055 string = sel.xtarget;
1056 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1057 XA_ATOM, 32, PropModeReplace,
1058 (uchar *) &string, 1);
1059 xev.property = xsre->property;
1060 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1061 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1062 xsre->target, 8, PropModeReplace,
1063 (uchar *) sel.clip, strlen(sel.clip));
1064 xev.property = xsre->property;
1065 }
1066
1067 /* all done, send a notification to the listener */
1068 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1069 fprintf(stderr, "Error sending SelectionNotify event\n");
1070 }
1071
1072 void
1073 xsetsel(char *str) {
1074 /* register the selection for both the clipboard and the primary */
1075 Atom clipboard;
1076
1077 free(sel.clip);
1078 sel.clip = str;
1079
1080 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1081
1082 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1083 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1084 }
1085
1086 void
1087 brelease(XEvent *e) {
1088 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1089 mousereport(e);
1090 return;
1091 }
1092
1093 if(e->xbutton.button == Button2) {
1094 selpaste(NULL);
1095 } else if(e->xbutton.button == Button1) {
1096 if(sel.mode < 2) {
1097 selclear(NULL);
1098 } else {
1099 getbuttoninfo(e);
1100 selcopy();
1101 }
1102 sel.mode = 0;
1103 tsetdirt(sel.nb.y, sel.ne.y);
1104 }
1105 }
1106
1107 void
1108 bmotion(XEvent *e) {
1109 int oldey, oldex, oldsby, oldsey;
1110
1111 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1112 mousereport(e);
1113 return;
1114 }
1115
1116 if(!sel.mode)
1117 return;
1118
1119 sel.mode++;
1120 oldey = sel.oe.y;
1121 oldex = sel.oe.x;
1122 oldsby = sel.nb.y;
1123 oldsey = sel.ne.y;
1124 getbuttoninfo(e);
1125
1126 if(oldey != sel.oe.y || oldex != sel.oe.x)
1127 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1128 }
1129
1130 void
1131 die(const char *errstr, ...) {
1132 va_list ap;
1133
1134 va_start(ap, errstr);
1135 vfprintf(stderr, errstr, ap);
1136 va_end(ap);
1137 exit(EXIT_FAILURE);
1138 }
1139
1140 void
1141 execsh(void) {
1142 char **args, *sh;
1143 const struct passwd *pw;
1144 char buf[sizeof(long) * 8 + 1];
1145
1146 errno = 0;
1147 if((pw = getpwuid(getuid())) == NULL) {
1148 if(errno)
1149 die("getpwuid:%s\n", strerror(errno));
1150 else
1151 die("who are you?\n");
1152 }
1153 unsetenv("COLUMNS");
1154 unsetenv("LINES");
1155 unsetenv("TERMCAP");
1156
1157 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1158 snprintf(buf, sizeof(buf), "%lu", xw.win);
1159
1160 setenv("LOGNAME", pw->pw_name, 1);
1161 setenv("USER", pw->pw_name, 1);
1162 setenv("SHELL", sh, 1);
1163 setenv("HOME", pw->pw_dir, 1);
1164 setenv("TERM", termname, 1);
1165 setenv("WINDOWID", buf, 1);
1166
1167 signal(SIGCHLD, SIG_DFL);
1168 signal(SIGHUP, SIG_DFL);
1169 signal(SIGINT, SIG_DFL);
1170 signal(SIGQUIT, SIG_DFL);
1171 signal(SIGTERM, SIG_DFL);
1172 signal(SIGALRM, SIG_DFL);
1173
1174 args = opt_cmd ? opt_cmd : (char *[]){sh, "-i", NULL};
1175 execvp(args[0], args);
1176 exit(EXIT_FAILURE);
1177 }
1178
1179 void
1180 sigchld(int a) {
1181 int stat, ret;
1182
1183 if(waitpid(pid, &stat, 0) < 0)
1184 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1185
1186 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1187 if (ret != EXIT_SUCCESS)
1188 die("child finished with error '%d'\n", stat);
1189 exit(EXIT_SUCCESS);
1190 }
1191
1192 void
1193 ttynew(void) {
1194 int m, s;
1195 struct winsize w = {term.row, term.col, 0, 0};
1196
1197 /* seems to work fine on linux, openbsd and freebsd */
1198 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1199 die("openpty failed: %s\n", strerror(errno));
1200
1201 switch(pid = fork()) {
1202 case -1:
1203 die("fork failed\n");
1204 break;
1205 case 0:
1206 setsid(); /* create a new process group */
1207 dup2(s, STDIN_FILENO);
1208 dup2(s, STDOUT_FILENO);
1209 dup2(s, STDERR_FILENO);
1210 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1211 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1212 close(s);
1213 close(m);
1214 execsh();
1215 break;
1216 default:
1217 close(s);
1218 cmdfd = m;
1219 signal(SIGCHLD, sigchld);
1220 if(opt_io) {
1221 term.mode |= MODE_PRINT;
1222 iofd = (!strcmp(opt_io, "-")) ?
1223 STDOUT_FILENO :
1224 open(opt_io, O_WRONLY | O_CREAT, 0666);
1225 if(iofd < 0) {
1226 fprintf(stderr, "Error opening %s:%s\n",
1227 opt_io, strerror(errno));
1228 }
1229 }
1230 break;
1231 }
1232 }
1233
1234 void
1235 ttyread(void) {
1236 static char buf[BUFSIZ];
1237 static int buflen = 0;
1238 char *ptr;
1239 char s[UTF_SIZ];
1240 int charsize; /* size of utf8 char in bytes */
1241 long unicodep;
1242 int ret;
1243
1244 /* append read bytes to unprocessed bytes */
1245 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1246 die("Couldn't read from shell: %s\n", strerror(errno));
1247
1248 /* process every complete utf8 char */
1249 buflen += ret;
1250 ptr = buf;
1251 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1252 utf8encode(unicodep, s, UTF_SIZ);
1253 tputc(s, charsize);
1254 ptr += charsize;
1255 buflen -= charsize;
1256 }
1257
1258 /* keep any uncomplete utf8 char for the next call */
1259 memmove(buf, ptr, buflen);
1260 }
1261
1262 void
1263 ttywrite(const char *s, size_t n) {
1264 if(xwrite(cmdfd, s, n) == -1)
1265 die("write error on tty: %s\n", strerror(errno));
1266 }
1267
1268 void
1269 ttysend(char *s, size_t n) {
1270 ttywrite(s, n);
1271 if(IS_SET(MODE_ECHO))
1272 techo(s, n);
1273 }
1274
1275 void
1276 ttyresize(void) {
1277 struct winsize w;
1278
1279 w.ws_row = term.row;
1280 w.ws_col = term.col;
1281 w.ws_xpixel = xw.tw;
1282 w.ws_ypixel = xw.th;
1283 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1284 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1285 }
1286
1287 int
1288 tattrset(int attr) {
1289 int i, j;
1290
1291 for(i = 0; i < term.row-1; i++) {
1292 for(j = 0; j < term.col-1; j++) {
1293 if(term.line[i][j].mode & attr)
1294 return 1;
1295 }
1296 }
1297
1298 return 0;
1299 }
1300
1301 void
1302 tsetdirt(int top, int bot) {
1303 int i;
1304
1305 LIMIT(top, 0, term.row-1);
1306 LIMIT(bot, 0, term.row-1);
1307
1308 for(i = top; i <= bot; i++)
1309 term.dirty[i] = 1;
1310 }
1311
1312 void
1313 tsetdirtattr(int attr) {
1314 int i, j;
1315
1316 for(i = 0; i < term.row-1; i++) {
1317 for(j = 0; j < term.col-1; j++) {
1318 if(term.line[i][j].mode & attr) {
1319 tsetdirt(i, i);
1320 break;
1321 }
1322 }
1323 }
1324 }
1325
1326 void
1327 tfulldirt(void) {
1328 tsetdirt(0, term.row-1);
1329 }
1330
1331 void
1332 tcursor(int mode) {
1333 static TCursor c[2];
1334 bool alt = IS_SET(MODE_ALTSCREEN);
1335
1336 if(mode == CURSOR_SAVE) {
1337 c[alt] = term.c;
1338 } else if(mode == CURSOR_LOAD) {
1339 term.c = c[alt];
1340 tmoveto(c[alt].x, c[alt].y);
1341 }
1342 }
1343
1344 void
1345 treset(void) {
1346 uint i;
1347
1348 term.c = (TCursor){{
1349 .mode = ATTR_NULL,
1350 .fg = defaultfg,
1351 .bg = defaultbg
1352 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1353
1354 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1355 for(i = tabspaces; i < term.col; i += tabspaces)
1356 term.tabs[i] = 1;
1357 term.top = 0;
1358 term.bot = term.row - 1;
1359 term.mode = MODE_WRAP;
1360 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1361 term.charset = 0;
1362
1363 for(i = 0; i < 2; i++) {
1364 tmoveto(0, 0);
1365 tcursor(CURSOR_SAVE);
1366 tclearregion(0, 0, term.col-1, term.row-1);
1367 tswapscreen();
1368 }
1369 }
1370
1371 void
1372 tnew(int col, int row) {
1373 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1374 tresize(col, row);
1375 term.numlock = 1;
1376
1377 treset();
1378 }
1379
1380 void
1381 tswapscreen(void) {
1382 Line *tmp = term.line;
1383
1384 term.line = term.alt;
1385 term.alt = tmp;
1386 term.mode ^= MODE_ALTSCREEN;
1387 tfulldirt();
1388 }
1389
1390 void
1391 tscrolldown(int orig, int n) {
1392 int i;
1393 Line temp;
1394
1395 LIMIT(n, 0, term.bot-orig+1);
1396
1397 tsetdirt(orig, term.bot-n);
1398 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1399
1400 for(i = term.bot; i >= orig+n; i--) {
1401 temp = term.line[i];
1402 term.line[i] = term.line[i-n];
1403 term.line[i-n] = temp;
1404 }
1405
1406 selscroll(orig, n);
1407 }
1408
1409 void
1410 tscrollup(int orig, int n) {
1411 int i;
1412 Line temp;
1413
1414 LIMIT(n, 0, term.bot-orig+1);
1415
1416 tclearregion(0, orig, term.col-1, orig+n-1);
1417 tsetdirt(orig+n, term.bot);
1418
1419 for(i = orig; i <= term.bot-n; i++) {
1420 temp = term.line[i];
1421 term.line[i] = term.line[i+n];
1422 term.line[i+n] = temp;
1423 }
1424
1425 selscroll(orig, -n);
1426 }
1427
1428 void
1429 selscroll(int orig, int n) {
1430 if(sel.ob.x == -1)
1431 return;
1432
1433 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1434 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1435 selclear(NULL);
1436 return;
1437 }
1438 if(sel.type == SEL_RECTANGULAR) {
1439 if(sel.ob.y < term.top)
1440 sel.ob.y = term.top;
1441 if(sel.oe.y > term.bot)
1442 sel.oe.y = term.bot;
1443 } else {
1444 if(sel.ob.y < term.top) {
1445 sel.ob.y = term.top;
1446 sel.ob.x = 0;
1447 }
1448 if(sel.oe.y > term.bot) {
1449 sel.oe.y = term.bot;
1450 sel.oe.x = term.col;
1451 }
1452 }
1453 selnormalize();
1454 }
1455 }
1456
1457 void
1458 tnewline(int first_col) {
1459 int y = term.c.y;
1460
1461 if(y == term.bot) {
1462 tscrollup(term.top, 1);
1463 } else {
1464 y++;
1465 }
1466 tmoveto(first_col ? 0 : term.c.x, y);
1467 }
1468
1469 void
1470 csiparse(void) {
1471 char *p = csiescseq.buf, *np;
1472 long int v;
1473
1474 csiescseq.narg = 0;
1475 if(*p == '?') {
1476 csiescseq.priv = 1;
1477 p++;
1478 }
1479
1480 csiescseq.buf[csiescseq.len] = '\0';
1481 while(p < csiescseq.buf+csiescseq.len) {
1482 np = NULL;
1483 v = strtol(p, &np, 10);
1484 if(np == p)
1485 v = 0;
1486 if(v == LONG_MAX || v == LONG_MIN)
1487 v = -1;
1488 csiescseq.arg[csiescseq.narg++] = v;
1489 p = np;
1490 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1491 break;
1492 p++;
1493 }
1494 csiescseq.mode = *p;
1495 }
1496
1497 /* for absolute user moves, when decom is set */
1498 void
1499 tmoveato(int x, int y) {
1500 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1501 }
1502
1503 void
1504 tmoveto(int x, int y) {
1505 int miny, maxy;
1506
1507 if(term.c.state & CURSOR_ORIGIN) {
1508 miny = term.top;
1509 maxy = term.bot;
1510 } else {
1511 miny = 0;
1512 maxy = term.row - 1;
1513 }
1514 LIMIT(x, 0, term.col-1);
1515 LIMIT(y, miny, maxy);
1516 term.c.state &= ~CURSOR_WRAPNEXT;
1517 term.c.x = x;
1518 term.c.y = y;
1519 }
1520
1521 void
1522 tsetchar(char *c, Glyph *attr, int x, int y) {
1523 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1524 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1525 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1526 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1527 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1528 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1529 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1530 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1531 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1532 };
1533
1534 /*
1535 * The table is proudly stolen from rxvt.
1536 */
1537 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1538 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1539 c = vt100_0[c[0] - 0x41];
1540 }
1541 }
1542
1543 if(term.line[y][x].mode & ATTR_WIDE) {
1544 if(x+1 < term.col) {
1545 term.line[y][x+1].c[0] = ' ';
1546 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1547 }
1548 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1549 term.line[y][x-1].c[0] = ' ';
1550 term.line[y][x-1].mode &= ~ATTR_WIDE;
1551 }
1552
1553 term.dirty[y] = 1;
1554 term.line[y][x] = *attr;
1555 memcpy(term.line[y][x].c, c, UTF_SIZ);
1556 }
1557
1558 void
1559 tclearregion(int x1, int y1, int x2, int y2) {
1560 int x, y, temp;
1561 Glyph *gp;
1562
1563 if(x1 > x2)
1564 temp = x1, x1 = x2, x2 = temp;
1565 if(y1 > y2)
1566 temp = y1, y1 = y2, y2 = temp;
1567
1568 LIMIT(x1, 0, term.col-1);
1569 LIMIT(x2, 0, term.col-1);
1570 LIMIT(y1, 0, term.row-1);
1571 LIMIT(y2, 0, term.row-1);
1572
1573 for(y = y1; y <= y2; y++) {
1574 term.dirty[y] = 1;
1575 for(x = x1; x <= x2; x++) {
1576 gp = &term.line[y][x];
1577 if(selected(x, y))
1578 selclear(NULL);
1579 gp->fg = term.c.attr.fg;
1580 gp->bg = term.c.attr.bg;
1581 gp->mode = 0;
1582 memcpy(gp->c, " ", 2);
1583 }
1584 }
1585 }
1586
1587 void
1588 tdeletechar(int n) {
1589 int dst, src, size;
1590 Glyph *line;
1591
1592 LIMIT(n, 0, term.col - term.c.x);
1593
1594 dst = term.c.x;
1595 src = term.c.x + n;
1596 size = term.col - src;
1597 line = term.line[term.c.y];
1598
1599 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1600 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1601 }
1602
1603 void
1604 tinsertblank(int n) {
1605 int dst, src, size;
1606 Glyph *line;
1607
1608 LIMIT(n, 0, term.col - term.c.x);
1609
1610 dst = term.c.x + n;
1611 src = term.c.x;
1612 size = term.col - dst;
1613 line = term.line[term.c.y];
1614
1615 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1616 tclearregion(src, term.c.y, dst - 1, term.c.y);
1617 }
1618
1619 void
1620 tinsertblankline(int n) {
1621 if(BETWEEN(term.c.y, term.top, term.bot))
1622 tscrolldown(term.c.y, n);
1623 }
1624
1625 void
1626 tdeleteline(int n) {
1627 if(BETWEEN(term.c.y, term.top, term.bot))
1628 tscrollup(term.c.y, n);
1629 }
1630
1631 int32_t
1632 tdefcolor(int *attr, int *npar, int l) {
1633 int32_t idx = -1;
1634 uint r, g, b;
1635
1636 switch (attr[*npar + 1]) {
1637 case 2: /* direct color in RGB space */
1638 if (*npar + 4 >= l) {
1639 fprintf(stderr,
1640 "erresc(38): Incorrect number of parameters (%d)\n",
1641 *npar);
1642 break;
1643 }
1644 r = attr[*npar + 2];
1645 g = attr[*npar + 3];
1646 b = attr[*npar + 4];
1647 *npar += 4;
1648 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1649 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1650 r, g, b);
1651 else
1652 idx = TRUECOLOR(r, g, b);
1653 break;
1654 case 5: /* indexed color */
1655 if (*npar + 2 >= l) {
1656 fprintf(stderr,
1657 "erresc(38): Incorrect number of parameters (%d)\n",
1658 *npar);
1659 break;
1660 }
1661 *npar += 2;
1662 if(!BETWEEN(attr[*npar], 0, 255))
1663 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1664 else
1665 idx = attr[*npar];
1666 break;
1667 case 0: /* implemented defined (only foreground) */
1668 case 1: /* transparent */
1669 case 3: /* direct color in CMY space */
1670 case 4: /* direct color in CMYK space */
1671 default:
1672 fprintf(stderr,
1673 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1674 break;
1675 }
1676
1677 return idx;
1678 }
1679
1680 void
1681 tsetattr(int *attr, int l) {
1682 int i;
1683 int32_t idx;
1684
1685 for(i = 0; i < l; i++) {
1686 switch(attr[i]) {
1687 case 0:
1688 term.c.attr.mode &= ~(
1689 ATTR_BOLD |
1690 ATTR_FAINT |
1691 ATTR_ITALIC |
1692 ATTR_UNDERLINE |
1693 ATTR_BLINK |
1694 ATTR_REVERSE |
1695 ATTR_INVISIBLE |
1696 ATTR_STRUCK );
1697 term.c.attr.fg = defaultfg;
1698 term.c.attr.bg = defaultbg;
1699 break;
1700 case 1:
1701 term.c.attr.mode |= ATTR_BOLD;
1702 break;
1703 case 2:
1704 term.c.attr.mode |= ATTR_FAINT;
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 /* FALLTHROUGH */
1714 case 6: /* rapid blink */
1715 term.c.attr.mode |= ATTR_BLINK;
1716 break;
1717 case 7:
1718 term.c.attr.mode |= ATTR_REVERSE;
1719 break;
1720 case 8:
1721 term.c.attr.mode |= ATTR_INVISIBLE;
1722 break;
1723 case 9:
1724 term.c.attr.mode |= ATTR_STRUCK;
1725 break;
1726 case 22:
1727 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1728 break;
1729 case 23:
1730 term.c.attr.mode &= ~ATTR_ITALIC;
1731 break;
1732 case 24:
1733 term.c.attr.mode &= ~ATTR_UNDERLINE;
1734 break;
1735 case 25:
1736 term.c.attr.mode &= ~ATTR_BLINK;
1737 break;
1738 case 27:
1739 term.c.attr.mode &= ~ATTR_REVERSE;
1740 break;
1741 case 28:
1742 term.c.attr.mode &= ~ATTR_INVISIBLE;
1743 break;
1744 case 29:
1745 term.c.attr.mode &= ~ATTR_STRUCK;
1746 break;
1747 case 38:
1748 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1749 term.c.attr.fg = idx;
1750 break;
1751 case 39:
1752 term.c.attr.fg = defaultfg;
1753 break;
1754 case 48:
1755 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1756 term.c.attr.bg = idx;
1757 break;
1758 case 49:
1759 term.c.attr.bg = defaultbg;
1760 break;
1761 default:
1762 if(BETWEEN(attr[i], 30, 37)) {
1763 term.c.attr.fg = attr[i] - 30;
1764 } else if(BETWEEN(attr[i], 40, 47)) {
1765 term.c.attr.bg = attr[i] - 40;
1766 } else if(BETWEEN(attr[i], 90, 97)) {
1767 term.c.attr.fg = attr[i] - 90 + 8;
1768 } else if(BETWEEN(attr[i], 100, 107)) {
1769 term.c.attr.bg = attr[i] - 100 + 8;
1770 } else {
1771 fprintf(stderr,
1772 "erresc(default): gfx attr %d unknown\n",
1773 attr[i]), csidump();
1774 }
1775 break;
1776 }
1777 }
1778 }
1779
1780 void
1781 tsetscroll(int t, int b) {
1782 int temp;
1783
1784 LIMIT(t, 0, term.row-1);
1785 LIMIT(b, 0, term.row-1);
1786 if(t > b) {
1787 temp = t;
1788 t = b;
1789 b = temp;
1790 }
1791 term.top = t;
1792 term.bot = b;
1793 }
1794
1795 void
1796 tsetmode(bool priv, bool set, int *args, int narg) {
1797 int *lim, mode;
1798 bool alt;
1799
1800 for(lim = args + narg; args < lim; ++args) {
1801 if(priv) {
1802 switch(*args) {
1803 case 1: /* DECCKM -- Cursor key */
1804 MODBIT(term.mode, set, MODE_APPCURSOR);
1805 break;
1806 case 5: /* DECSCNM -- Reverse video */
1807 mode = term.mode;
1808 MODBIT(term.mode, set, MODE_REVERSE);
1809 if(mode != term.mode)
1810 redraw(REDRAW_TIMEOUT);
1811 break;
1812 case 6: /* DECOM -- Origin */
1813 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1814 tmoveato(0, 0);
1815 break;
1816 case 7: /* DECAWM -- Auto wrap */
1817 MODBIT(term.mode, set, MODE_WRAP);
1818 break;
1819 case 0: /* Error (IGNORED) */
1820 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1821 case 3: /* DECCOLM -- Column (IGNORED) */
1822 case 4: /* DECSCLM -- Scroll (IGNORED) */
1823 case 8: /* DECARM -- Auto repeat (IGNORED) */
1824 case 18: /* DECPFF -- Printer feed (IGNORED) */
1825 case 19: /* DECPEX -- Printer extent (IGNORED) */
1826 case 42: /* DECNRCM -- National characters (IGNORED) */
1827 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1828 break;
1829 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1830 MODBIT(term.mode, !set, MODE_HIDE);
1831 break;
1832 case 9: /* X10 mouse compatibility mode */
1833 xsetpointermotion(0);
1834 MODBIT(term.mode, 0, MODE_MOUSE);
1835 MODBIT(term.mode, set, MODE_MOUSEX10);
1836 break;
1837 case 1000: /* 1000: report button press */
1838 xsetpointermotion(0);
1839 MODBIT(term.mode, 0, MODE_MOUSE);
1840 MODBIT(term.mode, set, MODE_MOUSEBTN);
1841 break;
1842 case 1002: /* 1002: report motion on button press */
1843 xsetpointermotion(0);
1844 MODBIT(term.mode, 0, MODE_MOUSE);
1845 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1846 break;
1847 case 1003: /* 1003: enable all mouse motions */
1848 xsetpointermotion(set);
1849 MODBIT(term.mode, 0, MODE_MOUSE);
1850 MODBIT(term.mode, set, MODE_MOUSEMANY);
1851 break;
1852 case 1004: /* 1004: send focus events to tty */
1853 MODBIT(term.mode, set, MODE_FOCUS);
1854 break;
1855 case 1006: /* 1006: extended reporting mode */
1856 MODBIT(term.mode, set, MODE_MOUSESGR);
1857 break;
1858 case 1034:
1859 MODBIT(term.mode, set, MODE_8BIT);
1860 break;
1861 case 1049: /* swap screen & set/restore cursor as xterm */
1862 if (!allowaltscreen)
1863 break;
1864 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1865 /* FALLTHROUGH */
1866 case 47: /* swap screen */
1867 case 1047:
1868 if (!allowaltscreen)
1869 break;
1870 alt = IS_SET(MODE_ALTSCREEN);
1871 if(alt) {
1872 tclearregion(0, 0, term.col-1,
1873 term.row-1);
1874 }
1875 if(set ^ alt) /* set is always 1 or 0 */
1876 tswapscreen();
1877 if(*args != 1049)
1878 break;
1879 /* FALLTHROUGH */
1880 case 1048:
1881 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1882 break;
1883 case 2004: /* 2004: bracketed paste mode */
1884 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1885 break;
1886 /* Not implemented mouse modes. See comments there. */
1887 case 1001: /* mouse highlight mode; can hang the
1888 terminal by design when implemented. */
1889 case 1005: /* UTF-8 mouse mode; will confuse
1890 applications not supporting UTF-8
1891 and luit. */
1892 case 1015: /* urxvt mangled mouse mode; incompatible
1893 and can be mistaken for other control
1894 codes. */
1895 default:
1896 fprintf(stderr,
1897 "erresc: unknown private set/reset mode %d\n",
1898 *args);
1899 break;
1900 }
1901 } else {
1902 switch(*args) {
1903 case 0: /* Error (IGNORED) */
1904 break;
1905 case 2: /* KAM -- keyboard action */
1906 MODBIT(term.mode, set, MODE_KBDLOCK);
1907 break;
1908 case 4: /* IRM -- Insertion-replacement */
1909 MODBIT(term.mode, set, MODE_INSERT);
1910 break;
1911 case 12: /* SRM -- Send/Receive */
1912 MODBIT(term.mode, !set, MODE_ECHO);
1913 break;
1914 case 20: /* LNM -- Linefeed/new line */
1915 MODBIT(term.mode, set, MODE_CRLF);
1916 break;
1917 default:
1918 fprintf(stderr,
1919 "erresc: unknown set/reset mode %d\n",
1920 *args);
1921 break;
1922 }
1923 }
1924 }
1925 }
1926
1927 void
1928 csihandle(void) {
1929 char buf[40];
1930 int len;
1931
1932 switch(csiescseq.mode) {
1933 default:
1934 unknown:
1935 fprintf(stderr, "erresc: unknown csi ");
1936 csidump();
1937 /* die(""); */
1938 break;
1939 case '@': /* ICH -- Insert <n> blank char */
1940 DEFAULT(csiescseq.arg[0], 1);
1941 tinsertblank(csiescseq.arg[0]);
1942 break;
1943 case 'A': /* CUU -- Cursor <n> Up */
1944 DEFAULT(csiescseq.arg[0], 1);
1945 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1946 break;
1947 case 'B': /* CUD -- Cursor <n> Down */
1948 case 'e': /* VPR --Cursor <n> Down */
1949 DEFAULT(csiescseq.arg[0], 1);
1950 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1951 break;
1952 case 'i': /* MC -- Media Copy */
1953 switch(csiescseq.arg[0]) {
1954 case 0:
1955 tdump();
1956 break;
1957 case 1:
1958 tdumpline(term.c.y);
1959 break;
1960 case 2:
1961 tdumpsel();
1962 break;
1963 case 4:
1964 term.mode &= ~MODE_PRINT;
1965 break;
1966 case 5:
1967 term.mode |= MODE_PRINT;
1968 break;
1969 }
1970 break;
1971 case 'c': /* DA -- Device Attributes */
1972 if(csiescseq.arg[0] == 0)
1973 ttywrite(vtiden, sizeof(vtiden) - 1);
1974 break;
1975 case 'C': /* CUF -- Cursor <n> Forward */
1976 case 'a': /* HPR -- Cursor <n> Forward */
1977 DEFAULT(csiescseq.arg[0], 1);
1978 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1979 break;
1980 case 'D': /* CUB -- Cursor <n> Backward */
1981 DEFAULT(csiescseq.arg[0], 1);
1982 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1983 break;
1984 case 'E': /* CNL -- Cursor <n> Down and first col */
1985 DEFAULT(csiescseq.arg[0], 1);
1986 tmoveto(0, term.c.y+csiescseq.arg[0]);
1987 break;
1988 case 'F': /* CPL -- Cursor <n> Up and first col */
1989 DEFAULT(csiescseq.arg[0], 1);
1990 tmoveto(0, term.c.y-csiescseq.arg[0]);
1991 break;
1992 case 'g': /* TBC -- Tabulation clear */
1993 switch(csiescseq.arg[0]) {
1994 case 0: /* clear current tab stop */
1995 term.tabs[term.c.x] = 0;
1996 break;
1997 case 3: /* clear all the tabs */
1998 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1999 break;
2000 default:
2001 goto unknown;
2002 }
2003 break;
2004 case 'G': /* CHA -- Move to <col> */
2005 case '`': /* HPA */
2006 DEFAULT(csiescseq.arg[0], 1);
2007 tmoveto(csiescseq.arg[0]-1, term.c.y);
2008 break;
2009 case 'H': /* CUP -- Move to <row> <col> */
2010 case 'f': /* HVP */
2011 DEFAULT(csiescseq.arg[0], 1);
2012 DEFAULT(csiescseq.arg[1], 1);
2013 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2014 break;
2015 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2016 DEFAULT(csiescseq.arg[0], 1);
2017 tputtab(csiescseq.arg[0]);
2018 break;
2019 case 'J': /* ED -- Clear screen */
2020 selclear(NULL);
2021 switch(csiescseq.arg[0]) {
2022 case 0: /* below */
2023 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2024 if(term.c.y < term.row-1) {
2025 tclearregion(0, term.c.y+1, term.col-1,
2026 term.row-1);
2027 }
2028 break;
2029 case 1: /* above */
2030 if(term.c.y > 1)
2031 tclearregion(0, 0, term.col-1, term.c.y-1);
2032 tclearregion(0, term.c.y, term.c.x, term.c.y);
2033 break;
2034 case 2: /* all */
2035 tclearregion(0, 0, term.col-1, term.row-1);
2036 break;
2037 default:
2038 goto unknown;
2039 }
2040 break;
2041 case 'K': /* EL -- Clear line */
2042 switch(csiescseq.arg[0]) {
2043 case 0: /* right */
2044 tclearregion(term.c.x, term.c.y, term.col-1,
2045 term.c.y);
2046 break;
2047 case 1: /* left */
2048 tclearregion(0, term.c.y, term.c.x, term.c.y);
2049 break;
2050 case 2: /* all */
2051 tclearregion(0, term.c.y, term.col-1, term.c.y);
2052 break;
2053 }
2054 break;
2055 case 'S': /* SU -- Scroll <n> line up */
2056 DEFAULT(csiescseq.arg[0], 1);
2057 tscrollup(term.top, csiescseq.arg[0]);
2058 break;
2059 case 'T': /* SD -- Scroll <n> line down */
2060 DEFAULT(csiescseq.arg[0], 1);
2061 tscrolldown(term.top, csiescseq.arg[0]);
2062 break;
2063 case 'L': /* IL -- Insert <n> blank lines */
2064 DEFAULT(csiescseq.arg[0], 1);
2065 tinsertblankline(csiescseq.arg[0]);
2066 break;
2067 case 'l': /* RM -- Reset Mode */
2068 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2069 break;
2070 case 'M': /* DL -- Delete <n> lines */
2071 DEFAULT(csiescseq.arg[0], 1);
2072 tdeleteline(csiescseq.arg[0]);
2073 break;
2074 case 'X': /* ECH -- Erase <n> char */
2075 DEFAULT(csiescseq.arg[0], 1);
2076 tclearregion(term.c.x, term.c.y,
2077 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2078 break;
2079 case 'P': /* DCH -- Delete <n> char */
2080 DEFAULT(csiescseq.arg[0], 1);
2081 tdeletechar(csiescseq.arg[0]);
2082 break;
2083 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2084 DEFAULT(csiescseq.arg[0], 1);
2085 tputtab(-csiescseq.arg[0]);
2086 break;
2087 case 'd': /* VPA -- Move to <row> */
2088 DEFAULT(csiescseq.arg[0], 1);
2089 tmoveato(term.c.x, csiescseq.arg[0]-1);
2090 break;
2091 case 'h': /* SM -- Set terminal mode */
2092 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2093 break;
2094 case 'm': /* SGR -- Terminal attribute (color) */
2095 tsetattr(csiescseq.arg, csiescseq.narg);
2096 break;
2097 case 'n': /* DSR – Device Status Report (cursor position) */
2098 if (csiescseq.arg[0] == 6) {
2099 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2100 term.c.y+1, term.c.x+1);
2101 ttywrite(buf, len);
2102 }
2103 break;
2104 case 'r': /* DECSTBM -- Set Scrolling Region */
2105 if(csiescseq.priv) {
2106 goto unknown;
2107 } else {
2108 DEFAULT(csiescseq.arg[0], 1);
2109 DEFAULT(csiescseq.arg[1], term.row);
2110 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2111 tmoveato(0, 0);
2112 }
2113 break;
2114 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2115 tcursor(CURSOR_SAVE);
2116 break;
2117 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2118 tcursor(CURSOR_LOAD);
2119 break;
2120 }
2121 }
2122
2123 void
2124 csidump(void) {
2125 int i;
2126 uint c;
2127
2128 printf("ESC[");
2129 for(i = 0; i < csiescseq.len; i++) {
2130 c = csiescseq.buf[i] & 0xff;
2131 if(isprint(c)) {
2132 putchar(c);
2133 } else if(c == '\n') {
2134 printf("(\\n)");
2135 } else if(c == '\r') {
2136 printf("(\\r)");
2137 } else if(c == 0x1b) {
2138 printf("(\\e)");
2139 } else {
2140 printf("(%02x)", c);
2141 }
2142 }
2143 putchar('\n');
2144 }
2145
2146 void
2147 csireset(void) {
2148 memset(&csiescseq, 0, sizeof(csiescseq));
2149 }
2150
2151 void
2152 strhandle(void) {
2153 char *p = NULL;
2154 int j, narg, par;
2155
2156 term.esc &= ~(ESC_STR_END|ESC_STR);
2157 strparse();
2158 narg = strescseq.narg;
2159 par = atoi(strescseq.args[0]);
2160
2161 switch(strescseq.type) {
2162 case ']': /* OSC -- Operating System Command */
2163 switch(par) {
2164 case 0:
2165 case 1:
2166 case 2:
2167 if(narg > 1)
2168 xsettitle(strescseq.args[1]);
2169 return;
2170 case 4: /* color set */
2171 if(narg < 3)
2172 break;
2173 p = strescseq.args[2];
2174 /* FALLTHROUGH */
2175 case 104: /* color reset, here p = NULL */
2176 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2177 if(xsetcolorname(j, p)) {
2178 fprintf(stderr, "erresc: invalid color %s\n", p);
2179 } else {
2180 /*
2181 * TODO if defaultbg color is changed, borders
2182 * are dirty
2183 */
2184 redraw(0);
2185 }
2186 return;
2187 }
2188 break;
2189 case 'k': /* old title set compatibility */
2190 xsettitle(strescseq.args[0]);
2191 return;
2192 case 'P': /* DCS -- Device Control String */
2193 case '_': /* APC -- Application Program Command */
2194 case '^': /* PM -- Privacy Message */
2195 return;
2196 }
2197
2198 fprintf(stderr, "erresc: unknown str ");
2199 strdump();
2200 }
2201
2202 void
2203 strparse(void) {
2204 char *p = strescseq.buf;
2205
2206 strescseq.narg = 0;
2207 strescseq.buf[strescseq.len] = '\0';
2208 while(p && strescseq.narg < STR_ARG_SIZ)
2209 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2210 }
2211
2212 void
2213 strdump(void) {
2214 int i;
2215 uint c;
2216
2217 printf("ESC%c", strescseq.type);
2218 for(i = 0; i < strescseq.len; i++) {
2219 c = strescseq.buf[i] & 0xff;
2220 if(c == '\0') {
2221 return;
2222 } else if(isprint(c)) {
2223 putchar(c);
2224 } else if(c == '\n') {
2225 printf("(\\n)");
2226 } else if(c == '\r') {
2227 printf("(\\r)");
2228 } else if(c == 0x1b) {
2229 printf("(\\e)");
2230 } else {
2231 printf("(%02x)", c);
2232 }
2233 }
2234 printf("ESC\\\n");
2235 }
2236
2237 void
2238 strreset(void) {
2239 memset(&strescseq, 0, sizeof(strescseq));
2240 }
2241
2242 void
2243 tprinter(char *s, size_t len) {
2244 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2245 fprintf(stderr, "Error writing in %s:%s\n",
2246 opt_io, strerror(errno));
2247 close(iofd);
2248 iofd = -1;
2249 }
2250 }
2251
2252 void
2253 toggleprinter(const Arg *arg) {
2254 term.mode ^= MODE_PRINT;
2255 }
2256
2257 void
2258 printscreen(const Arg *arg) {
2259 tdump();
2260 }
2261
2262 void
2263 printsel(const Arg *arg) {
2264 tdumpsel();
2265 }
2266
2267 void
2268 tdumpsel(void) {
2269 char *ptr;
2270
2271 if((ptr = getsel())) {
2272 tprinter(ptr, strlen(ptr));
2273 free(ptr);
2274 }
2275 }
2276
2277 void
2278 tdumpline(int n) {
2279 Glyph *bp, *end;
2280
2281 bp = &term.line[n][0];
2282 end = &bp[MIN(tlinelen(n), term.col) - 1];
2283 if(bp != end || bp->c[0] != ' ') {
2284 for( ;bp <= end; ++bp)
2285 tprinter(bp->c, utf8len(bp->c));
2286 }
2287 tprinter("\n", 1);
2288 }
2289
2290 void
2291 tdump(void) {
2292 int i;
2293
2294 for(i = 0; i < term.row; ++i)
2295 tdumpline(i);
2296 }
2297
2298 void
2299 tputtab(int n) {
2300 uint x = term.c.x;
2301
2302 if(n > 0) {
2303 while(x < term.col && n--)
2304 for(++x; x < term.col && !term.tabs[x]; ++x)
2305 /* nothing */ ;
2306 } else if(n < 0) {
2307 while(x > 0 && n++)
2308 for(--x; x > 0 && !term.tabs[x]; --x)
2309 /* nothing */ ;
2310 }
2311 tmoveto(x, term.c.y);
2312 }
2313
2314 void
2315 techo(char *buf, int len) {
2316 for(; len > 0; buf++, len--) {
2317 char c = *buf;
2318
2319 if(ISCONTROL((uchar) c)) { /* control code */
2320 if(c & 0x80) {
2321 c &= 0x7f;
2322 tputc("^", 1);
2323 tputc("[", 1);
2324 } else if(c != '\n' && c != '\r' && c != '\t') {
2325 c ^= 0x40;
2326 tputc("^", 1);
2327 }
2328 tputc(&c, 1);
2329 } else {
2330 break;
2331 }
2332 }
2333 if(len)
2334 tputc(buf, len);
2335 }
2336
2337 void
2338 tdeftran(char ascii) {
2339 static char cs[] = "0B";
2340 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2341 char *p;
2342
2343 if((p = strchr(cs, ascii)) == NULL) {
2344 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2345 } else {
2346 term.trantbl[term.icharset] = vcs[p - cs];
2347 }
2348 }
2349
2350 void
2351 tstrsequence(uchar c) {
2352 if (c & 0x80) {
2353 switch (c) {
2354 case 0x90: /* DCS -- Device Control String */
2355 c = 'P';
2356 break;
2357 case 0x9f: /* APC -- Application Program Command */
2358 c = '_';
2359 break;
2360 case 0x9e: /* PM -- Privacy Message */
2361 c = '^';
2362 break;
2363 case 0x9d: /* OSC -- Operating System Command */
2364 c = ']';
2365 break;
2366 }
2367 }
2368 strreset();
2369 strescseq.type = c;
2370 term.esc |= ESC_STR;
2371 return;
2372 }
2373
2374 void
2375 tcontrolcode(uchar ascii) {
2376 static char question[UTF_SIZ] = "?";
2377
2378 switch(ascii) {
2379 case '\t': /* HT */
2380 tputtab(1);
2381 return;
2382 case '\b': /* BS */
2383 tmoveto(term.c.x-1, term.c.y);
2384 return;
2385 case '\r': /* CR */
2386 tmoveto(0, term.c.y);
2387 return;
2388 case '\f': /* LF */
2389 case '\v': /* VT */
2390 case '\n': /* LF */
2391 /* go to first col if the mode is set */
2392 tnewline(IS_SET(MODE_CRLF));
2393 return;
2394 case '\a': /* BEL */
2395 if(term.esc & ESC_STR_END) {
2396 /* backwards compatibility to xterm */
2397 strhandle();
2398 } else {
2399 if(!(xw.state & WIN_FOCUSED))
2400 xseturgency(1);
2401 if (bellvolume)
2402 XBell(xw.dpy, bellvolume);
2403 }
2404 break;
2405 case '\033': /* ESC */
2406 csireset();
2407 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2408 term.esc |= ESC_START;
2409 return;
2410 case '\016': /* SO */
2411 term.charset = 0;
2412 return;
2413 case '\017': /* SI */
2414 term.charset = 1;
2415 return;
2416 case '\032': /* SUB */
2417 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2418 case '\030': /* CAN */
2419 csireset();
2420 break;
2421 case '\005': /* ENQ (IGNORED) */
2422 case '\000': /* NUL (IGNORED) */
2423 case '\021': /* XON (IGNORED) */
2424 case '\023': /* XOFF (IGNORED) */
2425 case 0177: /* DEL (IGNORED) */
2426 return;
2427 case 0x84: /* TODO: IND */
2428 break;
2429 case 0x85: /* NEL -- Next line */
2430 tnewline(1); /* always go to first col */
2431 break;
2432 case 0x88: /* HTS -- Horizontal tab stop */
2433 term.tabs[term.c.x] = 1;
2434 break;
2435 case 0x8d: /* TODO: RI */
2436 case 0x8e: /* TODO: SS2 */
2437 case 0x8f: /* TODO: SS3 */
2438 case 0x98: /* TODO: SOS */
2439 break;
2440 case 0x9a: /* DECID -- Identify Terminal */
2441 ttywrite(vtiden, sizeof(vtiden) - 1);
2442 break;
2443 case 0x9b: /* TODO: CSI */
2444 case 0x9c: /* TODO: ST */
2445 break;
2446 case 0x90: /* DCS -- Device Control String */
2447 case 0x9f: /* APC -- Application Program Command */
2448 case 0x9e: /* PM -- Privacy Message */
2449 case 0x9d: /* OSC -- Operating System Command */
2450 tstrsequence(ascii);
2451 return;
2452 }
2453 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2454 term.esc &= ~(ESC_STR_END|ESC_STR);
2455 return;
2456 }
2457
2458 void
2459 tdectest(char c) {
2460 static char E[UTF_SIZ] = "E";
2461 int x, y;
2462
2463 if(c == '8') { /* DEC screen alignment test. */
2464 for(x = 0; x < term.col; ++x) {
2465 for(y = 0; y < term.row; ++y)
2466 tsetchar(E, &term.c.attr, x, y);
2467 }
2468 }
2469 }
2470
2471 void
2472 tputc(char *c, int len) {
2473 uchar ascii;
2474 bool control;
2475 long unicodep;
2476 int width;
2477 Glyph *gp;
2478
2479 if(len == 1) {
2480 width = 1;
2481 unicodep = ascii = *c;
2482 } else {
2483 utf8decode(c, &unicodep, UTF_SIZ);
2484 width = wcwidth(unicodep);
2485 control = ISCONTROLC1(unicodep);
2486 ascii = unicodep;
2487 }
2488
2489 if(IS_SET(MODE_PRINT))
2490 tprinter(c, len);
2491 control = ISCONTROL(unicodep);
2492
2493 /*
2494 * STR sequence must be checked before anything else
2495 * because it uses all following characters until it
2496 * receives a ESC, a SUB, a ST or any other C1 control
2497 * character.
2498 */
2499 if(term.esc & ESC_STR) {
2500 if(width == 1 &&
2501 (ascii == '\a' || ascii == 030 ||
2502 ascii == 032 || ascii == 033 ||
2503 ISCONTROLC1(unicodep))) {
2504 term.esc &= ~(ESC_START|ESC_STR);
2505 term.esc |= ESC_STR_END;
2506 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2507 memmove(&strescseq.buf[strescseq.len], c, len);
2508 strescseq.len += len;
2509 return;
2510 } else {
2511 /*
2512 * Here is a bug in terminals. If the user never sends
2513 * some code to stop the str or esc command, then st
2514 * will stop responding. But this is better than
2515 * silently failing with unknown characters. At least
2516 * then users will report back.
2517 *
2518 * In the case users ever get fixed, here is the code:
2519 */
2520 /*
2521 * term.esc = 0;
2522 * strhandle();
2523 */
2524 return;
2525 }
2526 }
2527
2528 /*
2529 * Actions of control codes must be performed as soon they arrive
2530 * because they can be embedded inside a control sequence, and
2531 * they must not cause conflicts with sequences.
2532 */
2533 if(control) {
2534 tcontrolcode(ascii);
2535 /*
2536 * control codes are not shown ever
2537 */
2538 return;
2539 } else if(term.esc & ESC_START) {
2540 if(term.esc & ESC_CSI) {
2541 csiescseq.buf[csiescseq.len++] = ascii;
2542 if(BETWEEN(ascii, 0x40, 0x7E)
2543 || csiescseq.len >= \
2544 sizeof(csiescseq.buf)-1) {
2545 term.esc = 0;
2546 csiparse();
2547 csihandle();
2548 }
2549 return;
2550 } else if(term.esc & ESC_ALTCHARSET) {
2551 tdeftran(ascii);
2552 } else if(term.esc & ESC_TEST) {
2553 tdectest(ascii);
2554 } else {
2555 switch(ascii) {
2556 case '[':
2557 term.esc |= ESC_CSI;
2558 return;
2559 case '#':
2560 term.esc |= ESC_TEST;
2561 return;
2562 case 'P': /* DCS -- Device Control String */
2563 case '_': /* APC -- Application Program Command */
2564 case '^': /* PM -- Privacy Message */
2565 case ']': /* OSC -- Operating System Command */
2566 case 'k': /* old title set compatibility */
2567 tstrsequence(ascii);
2568 return;
2569 case '(': /* set primary charset G0 */
2570 case ')': /* set secondary charset G1 */
2571 case '*': /* set tertiary charset G2 */
2572 case '+': /* set quaternary charset G3 */
2573 term.icharset = ascii - '(';
2574 term.esc |= ESC_ALTCHARSET;
2575 return;
2576 case 'D': /* IND -- Linefeed */
2577 if(term.c.y == term.bot) {
2578 tscrollup(term.top, 1);
2579 } else {
2580 tmoveto(term.c.x, term.c.y+1);
2581 }
2582 break;
2583 case 'E': /* NEL -- Next line */
2584 tnewline(1); /* always go to first col */
2585 break;
2586 case 'H': /* HTS -- Horizontal tab stop */
2587 term.tabs[term.c.x] = 1;
2588 break;
2589 case 'M': /* RI -- Reverse index */
2590 if(term.c.y == term.top) {
2591 tscrolldown(term.top, 1);
2592 } else {
2593 tmoveto(term.c.x, term.c.y-1);
2594 }
2595 break;
2596 case 'Z': /* DECID -- Identify Terminal */
2597 ttywrite(vtiden, sizeof(vtiden) - 1);
2598 break;
2599 case 'c': /* RIS -- Reset to inital state */
2600 treset();
2601 xresettitle();
2602 xloadcols();
2603 break;
2604 case '=': /* DECPAM -- Application keypad */
2605 term.mode |= MODE_APPKEYPAD;
2606 break;
2607 case '>': /* DECPNM -- Normal keypad */
2608 term.mode &= ~MODE_APPKEYPAD;
2609 break;
2610 case '7': /* DECSC -- Save Cursor */
2611 tcursor(CURSOR_SAVE);
2612 break;
2613 case '8': /* DECRC -- Restore Cursor */
2614 tcursor(CURSOR_LOAD);
2615 break;
2616 case '\\': /* ST -- String Terminator */
2617 if(term.esc & ESC_STR_END)
2618 strhandle();
2619 break;
2620 default:
2621 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2622 (uchar) ascii, isprint(ascii)? ascii:'.');
2623 break;
2624 }
2625 }
2626 term.esc = 0;
2627 /*
2628 * All characters which form part of a sequence are not
2629 * printed
2630 */
2631 return;
2632 }
2633 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2634 selclear(NULL);
2635
2636 gp = &term.line[term.c.y][term.c.x];
2637 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2638 gp->mode |= ATTR_WRAP;
2639 tnewline(1);
2640 }
2641
2642 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2643 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2644
2645 if(term.c.x+width > term.col)
2646 tnewline(1);
2647
2648 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2649
2650 if(width == 2) {
2651 gp->mode |= ATTR_WIDE;
2652 if(term.c.x+1 < term.col) {
2653 gp[1].c[0] = '\0';
2654 gp[1].mode = ATTR_WDUMMY;
2655 }
2656 }
2657 if(term.c.x+width < term.col) {
2658 tmoveto(term.c.x+width, term.c.y);
2659 } else {
2660 term.c.state |= CURSOR_WRAPNEXT;
2661 }
2662 }
2663
2664 void
2665 tresize(int col, int row) {
2666 int i;
2667 int minrow = MIN(row, term.row);
2668 int mincol = MIN(col, term.col);
2669 int slide = term.c.y - row + 1;
2670 bool *bp;
2671 TCursor c;
2672
2673 if(col < 1 || row < 1) {
2674 fprintf(stderr,
2675 "tresize: error resizing to %dx%d\n", col, row);
2676 return;
2677 }
2678
2679 /* free unneeded rows */
2680 i = 0;
2681 if(slide > 0) {
2682 /*
2683 * slide screen to keep cursor where we expect it -
2684 * tscrollup would work here, but we can optimize to
2685 * memmove because we're freeing the earlier lines
2686 */
2687 for(/* i = 0 */; i < slide; i++) {
2688 free(term.line[i]);
2689 free(term.alt[i]);
2690 }
2691 memmove(term.line, term.line + slide, row * sizeof(Line));
2692 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2693 }
2694 for(i += row; i < term.row; i++) {
2695 free(term.line[i]);
2696 free(term.alt[i]);
2697 }
2698
2699 /* resize to new height */
2700 term.line = xrealloc(term.line, row * sizeof(Line));
2701 term.alt = xrealloc(term.alt, row * sizeof(Line));
2702 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2703 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2704
2705 /* resize each row to new width, zero-pad if needed */
2706 for(i = 0; i < minrow; i++) {
2707 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2708 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2709 }
2710
2711 /* allocate any new rows */
2712 for(/* i == minrow */; i < row; i++) {
2713 term.line[i] = xmalloc(col * sizeof(Glyph));
2714 term.alt[i] = xmalloc(col * sizeof(Glyph));
2715 }
2716 if(col > term.col) {
2717 bp = term.tabs + term.col;
2718
2719 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2720 while(--bp > term.tabs && !*bp)
2721 /* nothing */ ;
2722 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2723 *bp = 1;
2724 }
2725 /* update terminal size */
2726 term.col = col;
2727 term.row = row;
2728 /* reset scrolling region */
2729 tsetscroll(0, row-1);
2730 /* make use of the LIMIT in tmoveto */
2731 tmoveto(term.c.x, term.c.y);
2732 /* Clearing both screens (it makes dirty all lines) */
2733 c = term.c;
2734 for(i = 0; i < 2; i++) {
2735 if(mincol < col && 0 < minrow) {
2736 tclearregion(mincol, 0, col - 1, minrow - 1);
2737 }
2738 if(0 < col && minrow < row) {
2739 tclearregion(0, minrow, col - 1, row - 1);
2740 }
2741 tswapscreen();
2742 tcursor(CURSOR_LOAD);
2743 }
2744 term.c = c;
2745 }
2746
2747 void
2748 xresize(int col, int row) {
2749 xw.tw = MAX(1, col * xw.cw);
2750 xw.th = MAX(1, row * xw.ch);
2751
2752 XFreePixmap(xw.dpy, xw.buf);
2753 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2754 DefaultDepth(xw.dpy, xw.scr));
2755 XftDrawChange(xw.draw, xw.buf);
2756 xclear(0, 0, xw.w, xw.h);
2757 }
2758
2759 static inline ushort
2760 sixd_to_16bit(int x) {
2761 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2762 }
2763
2764 void
2765 xloadcols(void) {
2766 int i;
2767 XRenderColor color = { .alpha = 0xffff };
2768 static bool loaded;
2769 Color *cp;
2770
2771 if(loaded) {
2772 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2773 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2774 }
2775
2776 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2777 for(i = 0; i < LEN(colorname); i++) {
2778 if(!colorname[i])
2779 continue;
2780 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2781 die("Could not allocate color '%s'\n", colorname[i]);
2782 }
2783 }
2784
2785 /* load colors [16-231] ; same colors as xterm */
2786 for(i = 16; i < 6*6*6+16; i++) {
2787 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2788 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2789 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2790 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2791 die("Could not allocate color %d\n", i);
2792 }
2793
2794 /* load colors [232-255] ; grayscale */
2795 for(; i < 256; i++) {
2796 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2797 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2798 die("Could not allocate color %d\n", i);
2799 }
2800 loaded = true;
2801 }
2802
2803 int
2804 xsetcolorname(int x, const char *name) {
2805 XRenderColor color = { .alpha = 0xffff };
2806 Color ncolor;
2807
2808 if(!BETWEEN(x, 0, LEN(colorname)))
2809 return 1;
2810
2811 if(!name) {
2812 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2813 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2814 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2815 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2816 if(!XftColorAllocValue(xw.dpy, xw.vis,
2817 xw.cmap, &color, &ncolor)) {
2818 return 1;
2819 }
2820
2821 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2822 dc.col[x] = ncolor;
2823 return 0;
2824 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2825 color.red = color.green = color.blue = \
2826 0x0808 + 0x0a0a * (x - (16 + 216));
2827 if(!XftColorAllocValue(xw.dpy, xw.vis,
2828 xw.cmap, &color, &ncolor)) {
2829 return 1;
2830 }
2831
2832 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2833 dc.col[x] = ncolor;
2834 return 0;
2835 } else { /* system colors */
2836 name = colorname[x];
2837 }
2838 }
2839 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2840 return 1;
2841
2842 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2843 dc.col[x] = ncolor;
2844 return 0;
2845 }
2846
2847 void
2848 xtermclear(int col1, int row1, int col2, int row2) {
2849 XftDrawRect(xw.draw,
2850 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2851 borderpx + col1 * xw.cw,
2852 borderpx + row1 * xw.ch,
2853 (col2-col1+1) * xw.cw,
2854 (row2-row1+1) * xw.ch);
2855 }
2856
2857 /*
2858 * Absolute coordinates.
2859 */
2860 void
2861 xclear(int x1, int y1, int x2, int y2) {
2862 XftDrawRect(xw.draw,
2863 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2864 x1, y1, x2-x1, y2-y1);
2865 }
2866
2867 void
2868 xhints(void) {
2869 XClassHint class = {opt_class ? opt_class : termname, termname};
2870 XWMHints wm = {.flags = InputHint, .input = 1};
2871 XSizeHints *sizeh = NULL;
2872
2873 sizeh = XAllocSizeHints();
2874
2875 sizeh->flags = PSize | PResizeInc | PBaseSize;
2876 sizeh->height = xw.h;
2877 sizeh->width = xw.w;
2878 sizeh->height_inc = xw.ch;
2879 sizeh->width_inc = xw.cw;
2880 sizeh->base_height = 2 * borderpx;
2881 sizeh->base_width = 2 * borderpx;
2882 if(xw.isfixed == True) {
2883 sizeh->flags |= PMaxSize | PMinSize;
2884 sizeh->min_width = sizeh->max_width = xw.w;
2885 sizeh->min_height = sizeh->max_height = xw.h;
2886 }
2887 if(xw.gm & (XValue|YValue)) {
2888 sizeh->flags |= USPosition | PWinGravity;
2889 sizeh->x = xw.l;
2890 sizeh->y = xw.t;
2891 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2892 }
2893
2894 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2895 &class);
2896 XFree(sizeh);
2897 }
2898
2899 int
2900 xgeommasktogravity(int mask) {
2901 switch(mask & (XNegative|YNegative)) {
2902 case 0:
2903 return NorthWestGravity;
2904 case XNegative:
2905 return NorthEastGravity;
2906 case YNegative:
2907 return SouthWestGravity;
2908 }
2909 return SouthEastGravity;
2910 }
2911
2912 int
2913 xloadfont(Font *f, FcPattern *pattern) {
2914 FcPattern *match;
2915 FcResult result;
2916
2917 match = FcFontMatch(NULL, pattern, &result);
2918 if(!match)
2919 return 1;
2920
2921 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2922 FcPatternDestroy(match);
2923 return 1;
2924 }
2925
2926 f->set = NULL;
2927 f->pattern = FcPatternDuplicate(pattern);
2928
2929 f->ascent = f->match->ascent;
2930 f->descent = f->match->descent;
2931 f->lbearing = 0;
2932 f->rbearing = f->match->max_advance_width;
2933
2934 f->height = f->ascent + f->descent;
2935 f->width = f->lbearing + f->rbearing;
2936
2937 return 0;
2938 }
2939
2940 void
2941 xloadfonts(char *fontstr, double fontsize) {
2942 FcPattern *pattern;
2943 FcResult r_sz, r_psz;
2944 double fontval;
2945 float ceilf(float);
2946
2947 if(fontstr[0] == '-') {
2948 pattern = XftXlfdParse(fontstr, False, False);
2949 } else {
2950 pattern = FcNameParse((FcChar8 *)fontstr);
2951 }
2952
2953 if(!pattern)
2954 die("st: can't open font %s\n", fontstr);
2955
2956 if(fontsize > 0) {
2957 FcPatternDel(pattern, FC_PIXEL_SIZE);
2958 FcPatternDel(pattern, FC_SIZE);
2959 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2960 usedfontsize = fontsize;
2961 } else {
2962 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2963 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2964 if(r_psz == FcResultMatch) {
2965 usedfontsize = fontval;
2966 } else if(r_sz == FcResultMatch) {
2967 usedfontsize = -1;
2968 } else {
2969 /*
2970 * Default font size is 12, if none given. This is to
2971 * have a known usedfontsize value.
2972 */
2973 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2974 usedfontsize = 12;
2975 }
2976 }
2977
2978 FcConfigSubstitute(0, pattern, FcMatchPattern);
2979 FcDefaultSubstitute(pattern);
2980
2981 if(xloadfont(&dc.font, pattern))
2982 die("st: can't open font %s\n", fontstr);
2983
2984 if(usedfontsize < 0) {
2985 FcPatternGetDouble(dc.font.match->pattern,
2986 FC_PIXEL_SIZE, 0, &fontval);
2987 usedfontsize = fontval;
2988 }
2989
2990 /* Setting character width and height. */
2991 xw.cw = ceilf(dc.font.width * cwscale);
2992 xw.ch = ceilf(dc.font.height * chscale);
2993
2994 FcPatternDel(pattern, FC_SLANT);
2995 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2996 if(xloadfont(&dc.ifont, pattern))
2997 die("st: can't open font %s\n", fontstr);
2998
2999 FcPatternDel(pattern, FC_WEIGHT);
3000 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3001 if(xloadfont(&dc.ibfont, pattern))
3002 die("st: can't open font %s\n", fontstr);
3003
3004 FcPatternDel(pattern, FC_SLANT);
3005 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3006 if(xloadfont(&dc.bfont, pattern))
3007 die("st: can't open font %s\n", fontstr);
3008
3009 FcPatternDestroy(pattern);
3010 }
3011
3012 int
3013 xloadfontset(Font *f) {
3014 FcResult result;
3015
3016 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3017 return 1;
3018 return 0;
3019 }
3020
3021 void
3022 xunloadfont(Font *f) {
3023 XftFontClose(xw.dpy, f->match);
3024 FcPatternDestroy(f->pattern);
3025 if(f->set)
3026 FcFontSetDestroy(f->set);
3027 }
3028
3029 void
3030 xunloadfonts(void) {
3031 /* Free the loaded fonts in the font cache. */
3032 while(frclen > 0)
3033 XftFontClose(xw.dpy, frc[--frclen].font);
3034
3035 xunloadfont(&dc.font);
3036 xunloadfont(&dc.bfont);
3037 xunloadfont(&dc.ifont);
3038 xunloadfont(&dc.ibfont);
3039 }
3040
3041 void
3042 xzoom(const Arg *arg) {
3043 xunloadfonts();
3044 xloadfonts(usedfont, usedfontsize + arg->i);
3045 cresize(0, 0);
3046 redraw(0);
3047 xhints();
3048 }
3049
3050 void
3051 xinit(void) {
3052 XGCValues gcvalues;
3053 Cursor cursor;
3054 Window parent;
3055 pid_t thispid = getpid();
3056
3057 if(!(xw.dpy = XOpenDisplay(NULL)))
3058 die("Can't open display\n");
3059 xw.scr = XDefaultScreen(xw.dpy);
3060 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3061
3062 /* font */
3063 if(!FcInit())
3064 die("Could not init fontconfig.\n");
3065
3066 usedfont = (opt_font == NULL)? font : opt_font;
3067 xloadfonts(usedfont, 0);
3068
3069 /* colors */
3070 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3071 xloadcols();
3072
3073 /* adjust fixed window geometry */
3074 xw.w = 2 * borderpx + term.col * xw.cw;
3075 xw.h = 2 * borderpx + term.row * xw.ch;
3076 if(xw.gm & XNegative)
3077 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3078 if(xw.gm & YNegative)
3079 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3080
3081 /* Events */
3082 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3083 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3084 xw.attrs.bit_gravity = NorthWestGravity;
3085 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3086 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3087 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3088 xw.attrs.colormap = xw.cmap;
3089
3090 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3091 XRootWindow(xw.dpy, xw.scr);
3092 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3093 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3094 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3095 | CWEventMask | CWColormap, &xw.attrs);
3096
3097 memset(&gcvalues, 0, sizeof(gcvalues));
3098 gcvalues.graphics_exposures = False;
3099 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3100 &gcvalues);
3101 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3102 DefaultDepth(xw.dpy, xw.scr));
3103 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3104 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3105
3106 /* Xft rendering context */
3107 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3108
3109 /* input methods */
3110 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3111 XSetLocaleModifiers("@im=local");
3112 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3113 XSetLocaleModifiers("@im=");
3114 if((xw.xim = XOpenIM(xw.dpy,
3115 NULL, NULL, NULL)) == NULL) {
3116 die("XOpenIM failed. Could not open input"
3117 " device.\n");
3118 }
3119 }
3120 }
3121 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3122 | XIMStatusNothing, XNClientWindow, xw.win,
3123 XNFocusWindow, xw.win, NULL);
3124 if(xw.xic == NULL)
3125 die("XCreateIC failed. Could not obtain input method.\n");
3126
3127 /* white cursor, black outline */
3128 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3129 XDefineCursor(xw.dpy, xw.win, cursor);
3130 XRecolorCursor(xw.dpy, cursor,
3131 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3132 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3133
3134 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3135 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3136 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3137 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3138
3139 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3140 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3141 PropModeReplace, (uchar *)&thispid, 1);
3142
3143 xresettitle();
3144 XMapWindow(xw.dpy, xw.win);
3145 xhints();
3146 XSync(xw.dpy, False);
3147 }
3148
3149 void
3150 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3151 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3152 width = charlen * xw.cw, xp, i;
3153 int frcflags;
3154 int u8fl, u8fblen, u8cblen, doesexist;
3155 char *u8c, *u8fs;
3156 long unicodep;
3157 Font *font = &dc.font;
3158 FcResult fcres;
3159 FcPattern *fcpattern, *fontpattern;
3160 FcFontSet *fcsets[] = { NULL };
3161 FcCharSet *fccharset;
3162 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3163 XRenderColor colfg, colbg;
3164 XRectangle r;
3165 int oneatatime;
3166
3167 frcflags = FRC_NORMAL;
3168
3169 if(base.mode & ATTR_ITALIC) {
3170 if(base.fg == defaultfg)
3171 base.fg = defaultitalic;
3172 font = &dc.ifont;
3173 frcflags = FRC_ITALIC;
3174 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3175 if(base.fg == defaultfg)
3176 base.fg = defaultitalic;
3177 font = &dc.ibfont;
3178 frcflags = FRC_ITALICBOLD;
3179 } else if(base.mode & ATTR_UNDERLINE) {
3180 if(base.fg == defaultfg)
3181 base.fg = defaultunderline;
3182 }
3183
3184 if(IS_TRUECOL(base.fg)) {
3185 colfg.alpha = 0xffff;
3186 colfg.red = TRUERED(base.fg);
3187 colfg.green = TRUEGREEN(base.fg);
3188 colfg.blue = TRUEBLUE(base.fg);
3189 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3190 fg = &truefg;
3191 } else {
3192 fg = &dc.col[base.fg];
3193 }
3194
3195 if(IS_TRUECOL(base.bg)) {
3196 colbg.alpha = 0xffff;
3197 colbg.green = TRUEGREEN(base.bg);
3198 colbg.red = TRUERED(base.bg);
3199 colbg.blue = TRUEBLUE(base.bg);
3200 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3201 bg = &truebg;
3202 } else {
3203 bg = &dc.col[base.bg];
3204 }
3205
3206 if(base.mode & ATTR_BOLD) {
3207 /*
3208 * change basic system colors [0-7]
3209 * to bright system colors [8-15]
3210 */
3211 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3212 fg = &dc.col[base.fg + 8];
3213
3214 if(base.mode & ATTR_ITALIC) {
3215 font = &dc.ibfont;
3216 frcflags = FRC_ITALICBOLD;
3217 } else {
3218 font = &dc.bfont;
3219 frcflags = FRC_BOLD;
3220 }
3221 }
3222
3223 if(IS_SET(MODE_REVERSE)) {
3224 if(fg == &dc.col[defaultfg]) {
3225 fg = &dc.col[defaultbg];
3226 } else {
3227 colfg.red = ~fg->color.red;
3228 colfg.green = ~fg->color.green;
3229 colfg.blue = ~fg->color.blue;
3230 colfg.alpha = fg->color.alpha;
3231 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3232 &revfg);
3233 fg = &revfg;
3234 }
3235
3236 if(bg == &dc.col[defaultbg]) {
3237 bg = &dc.col[defaultfg];
3238 } else {
3239 colbg.red = ~bg->color.red;
3240 colbg.green = ~bg->color.green;
3241 colbg.blue = ~bg->color.blue;
3242 colbg.alpha = bg->color.alpha;
3243 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3244 &revbg);
3245 bg = &revbg;
3246 }
3247 }
3248
3249 if(base.mode & ATTR_REVERSE) {
3250 temp = fg;
3251 fg = bg;
3252 bg = temp;
3253 }
3254
3255 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3256 colfg.red = fg->color.red / 2;
3257 colfg.green = fg->color.green / 2;
3258 colfg.blue = fg->color.blue / 2;
3259 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3260 fg = &revfg;
3261 }
3262
3263 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3264 fg = bg;
3265
3266 if(base.mode & ATTR_INVISIBLE)
3267 fg = bg;
3268
3269 /* Intelligent cleaning up of the borders. */
3270 if(x == 0) {
3271 xclear(0, (y == 0)? 0 : winy, borderpx,
3272 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3273 }
3274 if(x + charlen >= term.col) {
3275 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3276 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3277 }
3278 if(y == 0)
3279 xclear(winx, 0, winx + width, borderpx);
3280 if(y == term.row-1)
3281 xclear(winx, winy + xw.ch, winx + width, xw.h);
3282
3283 /* Clean up the region we want to draw to. */
3284 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3285
3286 /* Set the clip region because Xft is sometimes dirty. */
3287 r.x = 0;
3288 r.y = 0;
3289 r.height = xw.ch;
3290 r.width = width;
3291 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3292
3293 for(xp = winx; bytelen > 0;) {
3294 /*
3295 * Search for the range in the to be printed string of glyphs
3296 * that are in the main font. Then print that range. If
3297 * some glyph is found that is not in the font, do the
3298 * fallback dance.
3299 */
3300 u8fs = s;
3301 u8fblen = 0;
3302 u8fl = 0;
3303 oneatatime = font->width != xw.cw;
3304 for(;;) {
3305 u8c = s;
3306 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3307 s += u8cblen;
3308 bytelen -= u8cblen;
3309
3310 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3311 if(doesexist) {
3312 u8fl++;
3313 u8fblen += u8cblen;
3314 if(!oneatatime && bytelen > 0)
3315 continue;
3316 }
3317
3318 if(u8fl > 0) {
3319 XftDrawStringUtf8(xw.draw, fg,
3320 font->match, xp,
3321 winy + font->ascent,
3322 (FcChar8 *)u8fs,
3323 u8fblen);
3324 xp += xw.cw * u8fl;
3325 }
3326 break;
3327 }
3328 if(doesexist) {
3329 if(oneatatime)
3330 continue;
3331 break;
3332 }
3333
3334 /* Search the font cache. */
3335 for(i = 0; i < frclen; i++) {
3336 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3337 && frc[i].flags == frcflags) {
3338 break;
3339 }
3340 }
3341
3342 /* Nothing was found. */
3343 if(i >= frclen) {
3344 if(!font->set)
3345 xloadfontset(font);
3346 fcsets[0] = font->set;
3347
3348 /*
3349 * Nothing was found in the cache. Now use
3350 * some dozen of Fontconfig calls to get the
3351 * font for one single character.
3352 *
3353 * Xft and fontconfig are design failures.
3354 */
3355 fcpattern = FcPatternDuplicate(font->pattern);
3356 fccharset = FcCharSetCreate();
3357
3358 FcCharSetAddChar(fccharset, unicodep);
3359 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3360 fccharset);
3361 FcPatternAddBool(fcpattern, FC_SCALABLE,
3362 FcTrue);
3363
3364 FcConfigSubstitute(0, fcpattern,
3365 FcMatchPattern);
3366 FcDefaultSubstitute(fcpattern);
3367
3368 fontpattern = FcFontSetMatch(0, fcsets,
3369 FcTrue, fcpattern, &fcres);
3370
3371 /*
3372 * Overwrite or create the new cache entry.
3373 */
3374 if(frclen >= LEN(frc)) {
3375 frclen = LEN(frc) - 1;
3376 XftFontClose(xw.dpy, frc[frclen].font);
3377 }
3378
3379 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3380 fontpattern);
3381 frc[frclen].flags = frcflags;
3382
3383 i = frclen;
3384 frclen++;
3385
3386 FcPatternDestroy(fcpattern);
3387 FcCharSetDestroy(fccharset);
3388 }
3389
3390 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3391 xp, winy + frc[i].font->ascent,
3392 (FcChar8 *)u8c, u8cblen);
3393
3394 xp += xw.cw * wcwidth(unicodep);
3395 }
3396
3397 /*
3398 * This is how the loop above actually should be. Why does the
3399 * application have to care about font details?
3400 *
3401 * I have to repeat: Xft and Fontconfig are design failures.
3402 */
3403 /*
3404 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3405 winy + font->ascent, (FcChar8 *)s, bytelen);
3406 */
3407
3408 if(base.mode & ATTR_UNDERLINE) {
3409 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3410 width, 1);
3411 }
3412
3413 if(base.mode & ATTR_STRUCK) {
3414 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3415 width, 1);
3416 }
3417
3418 /* Reset clip to none. */
3419 XftDrawSetClip(xw.draw, 0);
3420 }
3421
3422 void
3423 xdrawcursor(void) {
3424 static int oldx = 0, oldy = 0;
3425 int sl, width, curx;
3426 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3427
3428 LIMIT(oldx, 0, term.col-1);
3429 LIMIT(oldy, 0, term.row-1);
3430
3431 curx = term.c.x;
3432
3433 /* adjust position if in dummy */
3434 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3435 oldx--;
3436 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3437 curx--;
3438
3439 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3440
3441 /* remove the old cursor */
3442 sl = utf8len(term.line[oldy][oldx].c);
3443 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3444 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3445 oldy, width, sl);
3446
3447 /* draw the new one */
3448 if(!(IS_SET(MODE_HIDE))) {
3449 if(xw.state & WIN_FOCUSED) {
3450 if(IS_SET(MODE_REVERSE)) {
3451 g.mode |= ATTR_REVERSE;
3452 g.fg = defaultcs;
3453 g.bg = defaultfg;
3454 }
3455
3456 sl = utf8len(g.c);
3457 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3458 ? 2 : 1;
3459 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3460 } else {
3461 XftDrawRect(xw.draw, &dc.col[defaultcs],
3462 borderpx + curx * xw.cw,
3463 borderpx + term.c.y * xw.ch,
3464 xw.cw - 1, 1);
3465 XftDrawRect(xw.draw, &dc.col[defaultcs],
3466 borderpx + curx * xw.cw,
3467 borderpx + term.c.y * xw.ch,
3468 1, xw.ch - 1);
3469 XftDrawRect(xw.draw, &dc.col[defaultcs],
3470 borderpx + (curx + 1) * xw.cw - 1,
3471 borderpx + term.c.y * xw.ch,
3472 1, xw.ch - 1);
3473 XftDrawRect(xw.draw, &dc.col[defaultcs],
3474 borderpx + curx * xw.cw,
3475 borderpx + (term.c.y + 1) * xw.ch - 1,
3476 xw.cw, 1);
3477 }
3478 oldx = curx, oldy = term.c.y;
3479 }
3480 }
3481
3482
3483 void
3484 xsettitle(char *p) {
3485 XTextProperty prop;
3486
3487 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3488 &prop);
3489 XSetWMName(xw.dpy, xw.win, &prop);
3490 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3491 XFree(prop.value);
3492 }
3493
3494 void
3495 xresettitle(void) {
3496 xsettitle(opt_title ? opt_title : "st");
3497 }
3498
3499 void
3500 redraw(int timeout) {
3501 struct timespec tv = {0, timeout * 1000};
3502
3503 tfulldirt();
3504 draw();
3505
3506 if(timeout > 0) {
3507 nanosleep(&tv, NULL);
3508 XSync(xw.dpy, False); /* necessary for a good tput flash */
3509 }
3510 }
3511
3512 void
3513 draw(void) {
3514 drawregion(0, 0, term.col, term.row);
3515 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3516 xw.h, 0, 0);
3517 XSetForeground(xw.dpy, dc.gc,
3518 dc.col[IS_SET(MODE_REVERSE)?
3519 defaultfg : defaultbg].pixel);
3520 }
3521
3522 void
3523 drawregion(int x1, int y1, int x2, int y2) {
3524 int ic, ib, x, y, ox, sl;
3525 Glyph base, new;
3526 char buf[DRAW_BUF_SIZ];
3527 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3528 long unicodep;
3529
3530 if(!(xw.state & WIN_VISIBLE))
3531 return;
3532
3533 for(y = y1; y < y2; y++) {
3534 if(!term.dirty[y])
3535 continue;
3536
3537 xtermclear(0, y, term.col, y);
3538 term.dirty[y] = 0;
3539 base = term.line[y][0];
3540 ic = ib = ox = 0;
3541 for(x = x1; x < x2; x++) {
3542 new = term.line[y][x];
3543 if(new.mode == ATTR_WDUMMY)
3544 continue;
3545 if(ena_sel && selected(x, y))
3546 new.mode ^= ATTR_REVERSE;
3547 if(ib > 0 && (ATTRCMP(base, new)
3548 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3549 xdraws(buf, base, ox, y, ic, ib);
3550 ic = ib = 0;
3551 }
3552 if(ib == 0) {
3553 ox = x;
3554 base = new;
3555 }
3556
3557 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3558 memcpy(buf+ib, new.c, sl);
3559 ib += sl;
3560 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3561 }
3562 if(ib > 0)
3563 xdraws(buf, base, ox, y, ic, ib);
3564 }
3565 xdrawcursor();
3566 }
3567
3568 void
3569 expose(XEvent *ev) {
3570 XExposeEvent *e = &ev->xexpose;
3571
3572 if(xw.state & WIN_REDRAW) {
3573 if(!e->count)
3574 xw.state &= ~WIN_REDRAW;
3575 }
3576 redraw(0);
3577 }
3578
3579 void
3580 visibility(XEvent *ev) {
3581 XVisibilityEvent *e = &ev->xvisibility;
3582
3583 if(e->state == VisibilityFullyObscured) {
3584 xw.state &= ~WIN_VISIBLE;
3585 } else if(!(xw.state & WIN_VISIBLE)) {
3586 /* need a full redraw for next Expose, not just a buf copy */
3587 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3588 }
3589 }
3590
3591 void
3592 unmap(XEvent *ev) {
3593 xw.state &= ~WIN_VISIBLE;
3594 }
3595
3596 void
3597 xsetpointermotion(int set) {
3598 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3599 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3600 }
3601
3602 void
3603 xseturgency(int add) {
3604 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3605
3606 MODBIT(h->flags, add, XUrgencyHint);
3607 XSetWMHints(xw.dpy, xw.win, h);
3608 XFree(h);
3609 }
3610
3611 void
3612 focus(XEvent *ev) {
3613 XFocusChangeEvent *e = &ev->xfocus;
3614
3615 if(e->mode == NotifyGrab)
3616 return;
3617
3618 if(ev->type == FocusIn) {
3619 XSetICFocus(xw.xic);
3620 xw.state |= WIN_FOCUSED;
3621 xseturgency(0);
3622 if(IS_SET(MODE_FOCUS))
3623 ttywrite("\033[I", 3);
3624 } else {
3625 XUnsetICFocus(xw.xic);
3626 xw.state &= ~WIN_FOCUSED;
3627 if(IS_SET(MODE_FOCUS))
3628 ttywrite("\033[O", 3);
3629 }
3630 }
3631
3632 static inline bool
3633 match(uint mask, uint state) {
3634 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3635 }
3636
3637 void
3638 numlock(const Arg *dummy) {
3639 term.numlock ^= 1;
3640 }
3641
3642 char*
3643 kmap(KeySym k, uint state) {
3644 Key *kp;
3645 int i;
3646
3647 /* Check for mapped keys out of X11 function keys. */
3648 for(i = 0; i < LEN(mappedkeys); i++) {
3649 if(mappedkeys[i] == k)
3650 break;
3651 }
3652 if(i == LEN(mappedkeys)) {
3653 if((k & 0xFFFF) < 0xFD00)
3654 return NULL;
3655 }
3656
3657 for(kp = key; kp < key + LEN(key); kp++) {
3658 if(kp->k != k)
3659 continue;
3660
3661 if(!match(kp->mask, state))
3662 continue;
3663
3664 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3665 continue;
3666 if(term.numlock && kp->appkey == 2)
3667 continue;
3668
3669 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3670 continue;
3671
3672 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3673 continue;
3674
3675 return kp->s;
3676 }
3677
3678 return NULL;
3679 }
3680
3681 void
3682 kpress(XEvent *ev) {
3683 XKeyEvent *e = &ev->xkey;
3684 KeySym ksym;
3685 char buf[32], *customkey;
3686 int len;
3687 long c;
3688 Status status;
3689 Shortcut *bp;
3690
3691 if(IS_SET(MODE_KBDLOCK))
3692 return;
3693
3694 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3695 /* 1. shortcuts */
3696 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3697 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3698 bp->func(&(bp->arg));
3699 return;
3700 }
3701 }
3702
3703 /* 2. custom keys from config.h */
3704 if((customkey = kmap(ksym, e->state))) {
3705 ttysend(customkey, strlen(customkey));
3706 return;
3707 }
3708
3709 /* 3. composed string from input method */
3710 if(len == 0)
3711 return;
3712 if(len == 1 && e->state & Mod1Mask) {
3713 if(IS_SET(MODE_8BIT)) {
3714 if(*buf < 0177) {
3715 c = *buf | 0x80;
3716 len = utf8encode(c, buf, UTF_SIZ);
3717 }
3718 } else {
3719 buf[1] = buf[0];
3720 buf[0] = '\033';
3721 len = 2;
3722 }
3723 }
3724 ttysend(buf, len);
3725 }
3726
3727
3728 void
3729 cmessage(XEvent *e) {
3730 /*
3731 * See xembed specs
3732 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3733 */
3734 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3735 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3736 xw.state |= WIN_FOCUSED;
3737 xseturgency(0);
3738 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3739 xw.state &= ~WIN_FOCUSED;
3740 }
3741 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3742 /* Send SIGHUP to shell */
3743 kill(pid, SIGHUP);
3744 exit(EXIT_SUCCESS);
3745 }
3746 }
3747
3748 void
3749 cresize(int width, int height) {
3750 int col, row;
3751
3752 if(width != 0)
3753 xw.w = width;
3754 if(height != 0)
3755 xw.h = height;
3756
3757 col = (xw.w - 2 * borderpx) / xw.cw;
3758 row = (xw.h - 2 * borderpx) / xw.ch;
3759
3760 tresize(col, row);
3761 xresize(col, row);
3762 ttyresize();
3763 }
3764
3765 void
3766 resize(XEvent *e) {
3767 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3768 return;
3769
3770 cresize(e->xconfigure.width, e->xconfigure.height);
3771 }
3772
3773 void
3774 run(void) {
3775 XEvent ev;
3776 int w = xw.w, h = xw.h;
3777 fd_set rfd;
3778 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3779 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3780 long deltatime;
3781
3782 /* Waiting for window mapping */
3783 while(1) {
3784 XNextEvent(xw.dpy, &ev);
3785 if(XFilterEvent(&ev, None))
3786 continue;
3787 if(ev.type == ConfigureNotify) {
3788 w = ev.xconfigure.width;
3789 h = ev.xconfigure.height;
3790 } else if(ev.type == MapNotify) {
3791 break;
3792 }
3793 }
3794
3795 ttynew();
3796 cresize(w, h);
3797
3798 clock_gettime(CLOCK_MONOTONIC, &last);
3799 lastblink = last;
3800
3801 for(xev = actionfps;;) {
3802 FD_ZERO(&rfd);
3803 FD_SET(cmdfd, &rfd);
3804 FD_SET(xfd, &rfd);
3805
3806 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3807 if(errno == EINTR)
3808 continue;
3809 die("select failed: %s\n", strerror(errno));
3810 }
3811 if(FD_ISSET(cmdfd, &rfd)) {
3812 ttyread();
3813 if(blinktimeout) {
3814 blinkset = tattrset(ATTR_BLINK);
3815 if(!blinkset)
3816 MODBIT(term.mode, 0, MODE_BLINK);
3817 }
3818 }
3819
3820 if(FD_ISSET(xfd, &rfd))
3821 xev = actionfps;
3822
3823 clock_gettime(CLOCK_MONOTONIC, &now);
3824 drawtimeout.tv_sec = 0;
3825 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3826 tv = &drawtimeout;
3827
3828 dodraw = 0;
3829 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3830 tsetdirtattr(ATTR_BLINK);
3831 term.mode ^= MODE_BLINK;
3832 lastblink = now;
3833 dodraw = 1;
3834 }
3835 deltatime = TIMEDIFF(now, last);
3836 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3837 || deltatime < 0) {
3838 dodraw = 1;
3839 last = now;
3840 }
3841
3842 if(dodraw) {
3843 while(XPending(xw.dpy)) {
3844 XNextEvent(xw.dpy, &ev);
3845 if(XFilterEvent(&ev, None))
3846 continue;
3847 if(handler[ev.type])
3848 (handler[ev.type])(&ev);
3849 }
3850
3851 draw();
3852 XFlush(xw.dpy);
3853
3854 if(xev && !FD_ISSET(xfd, &rfd))
3855 xev--;
3856 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3857 if(blinkset) {
3858 if(TIMEDIFF(now, lastblink) \
3859 > blinktimeout) {
3860 drawtimeout.tv_nsec = 1000;
3861 } else {
3862 drawtimeout.tv_nsec = (1E6 * \
3863 (blinktimeout - \
3864 TIMEDIFF(now,
3865 lastblink)));
3866 }
3867 } else {
3868 tv = NULL;
3869 }
3870 }
3871 }
3872 }
3873 }
3874
3875 void
3876 usage(void) {
3877 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3878 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3879 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3880 }
3881
3882 int
3883 main(int argc, char *argv[]) {
3884 char *titles;
3885 uint cols = 80, rows = 24;
3886
3887 xw.l = xw.t = 0;
3888 xw.isfixed = False;
3889
3890 ARGBEGIN {
3891 case 'a':
3892 allowaltscreen = false;
3893 break;
3894 case 'c':
3895 opt_class = EARGF(usage());
3896 break;
3897 case 'e':
3898 /* eat all remaining arguments */
3899 if(argc > 1) {
3900 opt_cmd = &argv[1];
3901 if(argv[1] != NULL && opt_title == NULL) {
3902 titles = xstrdup(argv[1]);
3903 opt_title = basename(titles);
3904 }
3905 }
3906 goto run;
3907 case 'f':
3908 opt_font = EARGF(usage());
3909 break;
3910 case 'g':
3911 xw.gm = XParseGeometry(EARGF(usage()),
3912 &xw.l, &xw.t, &cols, &rows);
3913 break;
3914 case 'i':
3915 xw.isfixed = True;
3916 break;
3917 case 'o':
3918 opt_io = EARGF(usage());
3919 break;
3920 case 't':
3921 opt_title = EARGF(usage());
3922 break;
3923 case 'w':
3924 opt_embed = EARGF(usage());
3925 break;
3926 case 'v':
3927 default:
3928 usage();
3929 } ARGEND;
3930
3931 run:
3932 setlocale(LC_CTYPE, "");
3933 XSetLocaleModifiers("");
3934 tnew(cols? cols : 1, rows? rows : 1);
3935 xinit();
3936 selinit();
3937 run();
3938
3939 return 0;
3940 }
3941