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497885b0b48c03fc19be0de0e558049d05168e51
[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 << 0,
92 ATTR_FAINT = 1 << 1,
93 ATTR_ITALIC = 1 << 2,
94 ATTR_UNDERLINE = 1 << 3,
95 ATTR_BLINK = 1 << 4,
96 ATTR_REVERSE = 1 << 5,
97 ATTR_INVISIBLE = 1 << 6,
98 ATTR_STRUCK = 1 << 7,
99 ATTR_WRAP = 1 << 8,
100 ATTR_WIDE = 1 << 9,
101 ATTR_WDUMMY = 1 << 10,
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 << 0,
117 MODE_INSERT = 1 << 1,
118 MODE_APPKEYPAD = 1 << 2,
119 MODE_ALTSCREEN = 1 << 3,
120 MODE_CRLF = 1 << 4,
121 MODE_MOUSEBTN = 1 << 5,
122 MODE_MOUSEMOTION = 1 << 6,
123 MODE_REVERSE = 1 << 7,
124 MODE_KBDLOCK = 1 << 8,
125 MODE_HIDE = 1 << 9,
126 MODE_ECHO = 1 << 10,
127 MODE_APPCURSOR = 1 << 11,
128 MODE_MOUSESGR = 1 << 12,
129 MODE_8BIT = 1 << 13,
130 MODE_BLINK = 1 << 14,
131 MODE_FBLINK = 1 << 15,
132 MODE_FOCUS = 1 << 16,
133 MODE_MOUSEX10 = 1 << 17,
134 MODE_MOUSEMANY = 1 << 18,
135 MODE_BRCKTPASTE = 1 << 19,
136 MODE_PRINT = 1 << 20,
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 int eschandle(uchar ascii);
360 static void strdump(void);
361 static void strhandle(void);
362 static void strparse(void);
363 static void strreset(void);
364
365 static int tattrset(int);
366 static void tprinter(char *, size_t);
367 static void tdumpsel(void);
368 static void tdumpline(int);
369 static void tdump(void);
370 static void tclearregion(int, int, int, int);
371 static void tcursor(int);
372 static void tdeletechar(int);
373 static void tdeleteline(int);
374 static void tinsertblank(int);
375 static void tinsertblankline(int);
376 static int tlinelen(int);
377 static void tmoveto(int, int);
378 static void tmoveato(int, int);
379 static void tnew(int, int);
380 static void tnewline(int);
381 static void tputtab(int);
382 static void tputc(char *, int);
383 static void treset(void);
384 static void tresize(int, int);
385 static void tscrollup(int, int);
386 static void tscrolldown(int, int);
387 static void tsetattr(int *, int);
388 static void tsetchar(char *, Glyph *, int, int);
389 static void tsetscroll(int, int);
390 static void tswapscreen(void);
391 static void tsetdirt(int, int);
392 static void tsetdirtattr(int);
393 static void tsetmode(bool, bool, int *, int);
394 static void tfulldirt(void);
395 static void techo(char *, int);
396 static void tcontrolcode(uchar );
397 static void tdectest(char );
398 static int32_t tdefcolor(int *, int *, int);
399 static void tdeftran(char);
400 static inline bool match(uint, uint);
401 static void ttynew(void);
402 static void ttyread(void);
403 static void ttyresize(void);
404 static void ttysend(char *, size_t);
405 static void ttywrite(const char *, size_t);
406 static void tstrsequence(uchar c);
407
408 static void xdraws(char *, Glyph, int, int, int, int);
409 static void xhints(void);
410 static void xclear(int, int, int, int);
411 static void xdrawcursor(void);
412 static void xinit(void);
413 static void xloadcols(void);
414 static int xsetcolorname(int, const char *);
415 static int xgeommasktogravity(int);
416 static int xloadfont(Font *, FcPattern *);
417 static void xloadfonts(char *, double);
418 static int xloadfontset(Font *);
419 static void xsettitle(char *);
420 static void xresettitle(void);
421 static void xsetpointermotion(int);
422 static void xseturgency(int);
423 static void xsetsel(char *);
424 static void xtermclear(int, int, int, int);
425 static void xunloadfont(Font *);
426 static void xunloadfonts(void);
427 static void xresize(int, int);
428
429 static void expose(XEvent *);
430 static void visibility(XEvent *);
431 static void unmap(XEvent *);
432 static char *kmap(KeySym, uint);
433 static void kpress(XEvent *);
434 static void cmessage(XEvent *);
435 static void cresize(int, int);
436 static void resize(XEvent *);
437 static void focus(XEvent *);
438 static void brelease(XEvent *);
439 static void bpress(XEvent *);
440 static void bmotion(XEvent *);
441 static void selnotify(XEvent *);
442 static void selclear(XEvent *);
443 static void selrequest(XEvent *);
444
445 static void selinit(void);
446 static void selnormalize(void);
447 static inline bool selected(int, int);
448 static char *getsel(void);
449 static void selcopy(void);
450 static void selscroll(int, int);
451 static void selsnap(int, int *, int *, int);
452 static void getbuttoninfo(XEvent *);
453 static void mousereport(XEvent *);
454
455 static size_t utf8decode(char *, long *, size_t);
456 static long utf8decodebyte(char, size_t *);
457 static size_t utf8encode(long, char *, size_t);
458 static char utf8encodebyte(long, size_t);
459 static size_t utf8len(char *);
460 static size_t utf8validate(long *, size_t);
461
462 static ssize_t xwrite(int, const char *, size_t);
463 static void *xmalloc(size_t);
464 static void *xrealloc(void *, size_t);
465 static char *xstrdup(char *);
466
467 static void usage(void);
468
469 static void (*handler[LASTEvent])(XEvent *) = {
470 [KeyPress] = kpress,
471 [ClientMessage] = cmessage,
472 [ConfigureNotify] = resize,
473 [VisibilityNotify] = visibility,
474 [UnmapNotify] = unmap,
475 [Expose] = expose,
476 [FocusIn] = focus,
477 [FocusOut] = focus,
478 [MotionNotify] = bmotion,
479 [ButtonPress] = bpress,
480 [ButtonRelease] = brelease,
481 [SelectionClear] = selclear,
482 [SelectionNotify] = selnotify,
483 [SelectionRequest] = selrequest,
484 };
485
486 /* Globals */
487 static DC dc;
488 static XWindow xw;
489 static Term term;
490 static CSIEscape csiescseq;
491 static STREscape strescseq;
492 static int cmdfd;
493 static pid_t pid;
494 static Selection sel;
495 static int iofd = STDOUT_FILENO;
496 static char **opt_cmd = NULL;
497 static char *opt_io = NULL;
498 static char *opt_title = NULL;
499 static char *opt_embed = NULL;
500 static char *opt_class = NULL;
501 static char *opt_font = NULL;
502 static int oldbutton = 3; /* button event on startup: 3 = release */
503
504 static char *usedfont = NULL;
505 static double usedfontsize = 0;
506
507 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
508 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
509 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
510 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
511
512 /* Font Ring Cache */
513 enum {
514 FRC_NORMAL,
515 FRC_ITALIC,
516 FRC_BOLD,
517 FRC_ITALICBOLD
518 };
519
520 typedef struct {
521 XftFont *font;
522 int flags;
523 } Fontcache;
524
525 /* Fontcache is an array now. A new font will be appended to the array. */
526 static Fontcache frc[16];
527 static int frclen = 0;
528
529 ssize_t
530 xwrite(int fd, const char *s, size_t len) {
531 size_t aux = len;
532
533 while(len > 0) {
534 ssize_t r = write(fd, s, len);
535 if(r < 0)
536 return r;
537 len -= r;
538 s += r;
539 }
540 return aux;
541 }
542
543 void *
544 xmalloc(size_t len) {
545 void *p = malloc(len);
546
547 if(!p)
548 die("Out of memory\n");
549
550 return p;
551 }
552
553 void *
554 xrealloc(void *p, size_t len) {
555 if((p = realloc(p, len)) == NULL)
556 die("Out of memory\n");
557
558 return p;
559 }
560
561 char *
562 xstrdup(char *s) {
563 if((s = strdup(s)) == NULL)
564 die("Out of memory\n");
565
566 return s;
567 }
568
569 size_t
570 utf8decode(char *c, long *u, size_t clen) {
571 size_t i, j, len, type;
572 long udecoded;
573
574 *u = UTF_INVALID;
575 if(!clen)
576 return 0;
577 udecoded = utf8decodebyte(c[0], &len);
578 if(!BETWEEN(len, 1, UTF_SIZ))
579 return 1;
580 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
581 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
582 if(type != 0)
583 return j;
584 }
585 if(j < len)
586 return 0;
587 *u = udecoded;
588 utf8validate(u, len);
589 return len;
590 }
591
592 long
593 utf8decodebyte(char c, size_t *i) {
594 for(*i = 0; *i < LEN(utfmask); ++(*i))
595 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
596 return (uchar)c & ~utfmask[*i];
597 return 0;
598 }
599
600 size_t
601 utf8encode(long u, char *c, size_t clen) {
602 size_t len, i;
603
604 len = utf8validate(&u, 0);
605 if(clen < len)
606 return 0;
607 for(i = len - 1; i != 0; --i) {
608 c[i] = utf8encodebyte(u, 0);
609 u >>= 6;
610 }
611 c[0] = utf8encodebyte(u, len);
612 return len;
613 }
614
615 char
616 utf8encodebyte(long u, size_t i) {
617 return utfbyte[i] | (u & ~utfmask[i]);
618 }
619
620 size_t
621 utf8len(char *c) {
622 return utf8decode(c, &(long){0}, UTF_SIZ);
623 }
624
625 size_t
626 utf8validate(long *u, size_t i) {
627 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
628 *u = UTF_INVALID;
629 for(i = 1; *u > utfmax[i]; ++i)
630 ;
631 return i;
632 }
633
634 static void
635 selinit(void) {
636 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
637 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
638 sel.mode = 0;
639 sel.ob.x = -1;
640 sel.clip = NULL;
641 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
642 if(sel.xtarget == None)
643 sel.xtarget = XA_STRING;
644 }
645
646 static int
647 x2col(int x) {
648 x -= borderpx;
649 x /= xw.cw;
650
651 return LIMIT(x, 0, term.col-1);
652 }
653
654 static int
655 y2row(int y) {
656 y -= borderpx;
657 y /= xw.ch;
658
659 return LIMIT(y, 0, term.row-1);
660 }
661
662 static int tlinelen(int y) {
663 int i = term.col;
664
665 while (i > 0 && term.line[y][i - 1].c[0] == ' ')
666 --i;
667
668 return i;
669 }
670
671 static void
672 selnormalize(void) {
673 int i;
674
675 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
676 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
677 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
678 } else {
679 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
680 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
681 }
682 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
683 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
684
685 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
686 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
687
688 /* expand selection over line breaks */
689 if (sel.type == SEL_RECTANGULAR)
690 return;
691 i = tlinelen(sel.nb.y);
692 if (i < sel.nb.x)
693 sel.nb.x = i;
694 if (tlinelen(sel.ne.y) <= sel.ne.x)
695 sel.ne.x = term.col - 1;
696 }
697
698 static inline bool
699 selected(int x, int y) {
700 if(sel.type == SEL_RECTANGULAR)
701 return BETWEEN(y, sel.nb.y, sel.ne.y)
702 && BETWEEN(x, sel.nb.x, sel.ne.x);
703
704 return BETWEEN(y, sel.nb.y, sel.ne.y)
705 && (y != sel.nb.y || x >= sel.nb.x)
706 && (y != sel.ne.y || x <= sel.ne.x);
707 }
708
709 void
710 selsnap(int mode, int *x, int *y, int direction) {
711 int newx, newy, xt, yt;
712 bool delim, prevdelim;
713 Glyph *gp, *prevgp;
714
715 switch(mode) {
716 case SNAP_WORD:
717 /*
718 * Snap around if the word wraps around at the end or
719 * beginning of a line.
720 */
721 prevgp = &term.line[*y][*x];
722 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
723 for(;;) {
724 newx = *x + direction;
725 newy = *y;
726 if(!BETWEEN(newx, 0, term.col - 1)) {
727 newy += direction;
728 newx = (newx + term.col) % term.col;
729 if (!BETWEEN(newy, 0, term.row - 1))
730 break;
731
732 if(direction > 0)
733 yt = *y, xt = *x;
734 else
735 yt = newy, xt = newx;
736 if(!(term.line[yt][xt].mode & ATTR_WRAP))
737 break;
738 }
739
740 if (newx >= tlinelen(newy))
741 break;
742
743 gp = &term.line[newy][newx];
744 delim = strchr(worddelimiters, gp->c[0]) != NULL;
745 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
746 || (delim && gp->c[0] != prevgp->c[0])))
747 break;
748
749 *x = newx;
750 *y = newy;
751 prevgp = gp;
752 prevdelim = delim;
753 }
754 break;
755 case SNAP_LINE:
756 /*
757 * Snap around if the the previous line or the current one
758 * has set ATTR_WRAP at its end. Then the whole next or
759 * previous line will be selected.
760 */
761 *x = (direction < 0) ? 0 : term.col - 1;
762 if(direction < 0 && *y > 0) {
763 for(; *y > 0; *y += direction) {
764 if(!(term.line[*y-1][term.col-1].mode
765 & ATTR_WRAP)) {
766 break;
767 }
768 }
769 } else if(direction > 0 && *y < term.row-1) {
770 for(; *y < term.row; *y += direction) {
771 if(!(term.line[*y][term.col-1].mode
772 & ATTR_WRAP)) {
773 break;
774 }
775 }
776 }
777 break;
778 }
779 }
780
781 void
782 getbuttoninfo(XEvent *e) {
783 int type;
784 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
785
786 sel.alt = IS_SET(MODE_ALTSCREEN);
787
788 sel.oe.x = x2col(e->xbutton.x);
789 sel.oe.y = y2row(e->xbutton.y);
790 selnormalize();
791
792 sel.type = SEL_REGULAR;
793 for(type = 1; type < LEN(selmasks); ++type) {
794 if(match(selmasks[type], state)) {
795 sel.type = type;
796 break;
797 }
798 }
799 }
800
801 void
802 mousereport(XEvent *e) {
803 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
804 button = e->xbutton.button, state = e->xbutton.state,
805 len;
806 char buf[40];
807 static int ox, oy;
808
809 /* from urxvt */
810 if(e->xbutton.type == MotionNotify) {
811 if(x == ox && y == oy)
812 return;
813 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
814 return;
815 /* MOUSE_MOTION: no reporting if no button is pressed */
816 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
817 return;
818
819 button = oldbutton + 32;
820 ox = x;
821 oy = y;
822 } else {
823 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
824 button = 3;
825 } else {
826 button -= Button1;
827 if(button >= 3)
828 button += 64 - 3;
829 }
830 if(e->xbutton.type == ButtonPress) {
831 oldbutton = button;
832 ox = x;
833 oy = y;
834 } else if(e->xbutton.type == ButtonRelease) {
835 oldbutton = 3;
836 /* MODE_MOUSEX10: no button release reporting */
837 if(IS_SET(MODE_MOUSEX10))
838 return;
839 if (button == 64 || button == 65)
840 return;
841 }
842 }
843
844 if(!IS_SET(MODE_MOUSEX10)) {
845 button += (state & ShiftMask ? 4 : 0)
846 + (state & Mod4Mask ? 8 : 0)
847 + (state & ControlMask ? 16 : 0);
848 }
849
850 len = 0;
851 if(IS_SET(MODE_MOUSESGR)) {
852 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
853 button, x+1, y+1,
854 e->xbutton.type == ButtonRelease ? 'm' : 'M');
855 } else if(x < 223 && y < 223) {
856 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
857 32+button, 32+x+1, 32+y+1);
858 } else {
859 return;
860 }
861
862 ttywrite(buf, len);
863 }
864
865 void
866 bpress(XEvent *e) {
867 struct timespec now;
868 Mousekey *mk;
869
870 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
871 mousereport(e);
872 return;
873 }
874
875 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
876 if(e->xbutton.button == mk->b
877 && match(mk->mask, e->xbutton.state)) {
878 ttysend(mk->s, strlen(mk->s));
879 return;
880 }
881 }
882
883 if(e->xbutton.button == Button1) {
884 clock_gettime(CLOCK_MONOTONIC, &now);
885
886 /* Clear previous selection, logically and visually. */
887 selclear(NULL);
888 sel.mode = 1;
889 sel.type = SEL_REGULAR;
890 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
891 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
892
893 /*
894 * If the user clicks below predefined timeouts specific
895 * snapping behaviour is exposed.
896 */
897 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
898 sel.snap = SNAP_LINE;
899 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
900 sel.snap = SNAP_WORD;
901 } else {
902 sel.snap = 0;
903 }
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 tdectest(char c) {
2352 static char E[UTF_SIZ] = "E";
2353 int x, y;
2354
2355 if(c == '8') { /* DEC screen alignment test. */
2356 for(x = 0; x < term.col; ++x) {
2357 for(y = 0; y < term.row; ++y)
2358 tsetchar(E, &term.c.attr, x, y);
2359 }
2360 }
2361 }
2362
2363 void
2364 tstrsequence(uchar c) {
2365 if (c & 0x80) {
2366 switch (c) {
2367 case 0x90: /* DCS -- Device Control String */
2368 c = 'P';
2369 break;
2370 case 0x9f: /* APC -- Application Program Command */
2371 c = '_';
2372 break;
2373 case 0x9e: /* PM -- Privacy Message */
2374 c = '^';
2375 break;
2376 case 0x9d: /* OSC -- Operating System Command */
2377 c = ']';
2378 break;
2379 }
2380 }
2381 strreset();
2382 strescseq.type = c;
2383 term.esc |= ESC_STR;
2384 return;
2385 }
2386
2387 void
2388 tcontrolcode(uchar ascii) {
2389 static char question[UTF_SIZ] = "?";
2390
2391 switch(ascii) {
2392 case '\t': /* HT */
2393 tputtab(1);
2394 return;
2395 case '\b': /* BS */
2396 tmoveto(term.c.x-1, term.c.y);
2397 return;
2398 case '\r': /* CR */
2399 tmoveto(0, term.c.y);
2400 return;
2401 case '\f': /* LF */
2402 case '\v': /* VT */
2403 case '\n': /* LF */
2404 /* go to first col if the mode is set */
2405 tnewline(IS_SET(MODE_CRLF));
2406 return;
2407 case '\a': /* BEL */
2408 if(term.esc & ESC_STR_END) {
2409 /* backwards compatibility to xterm */
2410 strhandle();
2411 } else {
2412 if(!(xw.state & WIN_FOCUSED))
2413 xseturgency(1);
2414 if (bellvolume)
2415 XBell(xw.dpy, bellvolume);
2416 }
2417 break;
2418 case '\033': /* ESC */
2419 csireset();
2420 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2421 term.esc |= ESC_START;
2422 return;
2423 case '\016': /* SO */
2424 term.charset = 0;
2425 return;
2426 case '\017': /* SI */
2427 term.charset = 1;
2428 return;
2429 case '\032': /* SUB */
2430 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2431 case '\030': /* CAN */
2432 csireset();
2433 break;
2434 case '\005': /* ENQ (IGNORED) */
2435 case '\000': /* NUL (IGNORED) */
2436 case '\021': /* XON (IGNORED) */
2437 case '\023': /* XOFF (IGNORED) */
2438 case 0177: /* DEL (IGNORED) */
2439 return;
2440 case 0x84: /* TODO: IND */
2441 break;
2442 case 0x85: /* NEL -- Next line */
2443 tnewline(1); /* always go to first col */
2444 break;
2445 case 0x88: /* HTS -- Horizontal tab stop */
2446 term.tabs[term.c.x] = 1;
2447 break;
2448 case 0x8d: /* TODO: RI */
2449 case 0x8e: /* TODO: SS2 */
2450 case 0x8f: /* TODO: SS3 */
2451 case 0x98: /* TODO: SOS */
2452 break;
2453 case 0x9a: /* DECID -- Identify Terminal */
2454 ttywrite(vtiden, sizeof(vtiden) - 1);
2455 break;
2456 case 0x9b: /* TODO: CSI */
2457 case 0x9c: /* TODO: ST */
2458 break;
2459 case 0x90: /* DCS -- Device Control String */
2460 case 0x9f: /* APC -- Application Program Command */
2461 case 0x9e: /* PM -- Privacy Message */
2462 case 0x9d: /* OSC -- Operating System Command */
2463 tstrsequence(ascii);
2464 return;
2465 }
2466 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2467 term.esc &= ~(ESC_STR_END|ESC_STR);
2468 return;
2469 }
2470
2471 /*
2472 * returns 1 when the sequence is finished and it hasn't to read
2473 * more characters for this sequence, otherwise 0
2474 */
2475 int
2476 eschandle(uchar ascii) {
2477 switch(ascii) {
2478 case '[':
2479 term.esc |= ESC_CSI;
2480 return 0;
2481 case '#':
2482 term.esc |= ESC_TEST;
2483 return 0;
2484 case 'P': /* DCS -- Device Control String */
2485 case '_': /* APC -- Application Program Command */
2486 case '^': /* PM -- Privacy Message */
2487 case ']': /* OSC -- Operating System Command */
2488 case 'k': /* old title set compatibility */
2489 tstrsequence(ascii);
2490 return 0;
2491 case '(': /* set primary charset G0 */
2492 case ')': /* set secondary charset G1 */
2493 case '*': /* set tertiary charset G2 */
2494 case '+': /* set quaternary charset G3 */
2495 term.icharset = ascii - '(';
2496 term.esc |= ESC_ALTCHARSET;
2497 return 0;
2498 case 'D': /* IND -- Linefeed */
2499 if(term.c.y == term.bot) {
2500 tscrollup(term.top, 1);
2501 } else {
2502 tmoveto(term.c.x, term.c.y+1);
2503 }
2504 break;
2505 case 'E': /* NEL -- Next line */
2506 tnewline(1); /* always go to first col */
2507 break;
2508 case 'H': /* HTS -- Horizontal tab stop */
2509 term.tabs[term.c.x] = 1;
2510 break;
2511 case 'M': /* RI -- Reverse index */
2512 if(term.c.y == term.top) {
2513 tscrolldown(term.top, 1);
2514 } else {
2515 tmoveto(term.c.x, term.c.y-1);
2516 }
2517 break;
2518 case 'Z': /* DECID -- Identify Terminal */
2519 ttywrite(vtiden, sizeof(vtiden) - 1);
2520 break;
2521 case 'c': /* RIS -- Reset to inital state */
2522 treset();
2523 xresettitle();
2524 xloadcols();
2525 break;
2526 case '=': /* DECPAM -- Application keypad */
2527 term.mode |= MODE_APPKEYPAD;
2528 break;
2529 case '>': /* DECPNM -- Normal keypad */
2530 term.mode &= ~MODE_APPKEYPAD;
2531 break;
2532 case '7': /* DECSC -- Save Cursor */
2533 tcursor(CURSOR_SAVE);
2534 break;
2535 case '8': /* DECRC -- Restore Cursor */
2536 tcursor(CURSOR_LOAD);
2537 break;
2538 case '\\': /* ST -- String Terminator */
2539 if(term.esc & ESC_STR_END)
2540 strhandle();
2541 break;
2542 default:
2543 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2544 (uchar) ascii, isprint(ascii)? ascii:'.');
2545 break;
2546 }
2547 return 1;
2548 }
2549
2550 void
2551 tputc(char *c, int len) {
2552 uchar ascii;
2553 bool control;
2554 long unicodep;
2555 int width;
2556 Glyph *gp;
2557
2558 if(len == 1) {
2559 width = 1;
2560 unicodep = ascii = *c;
2561 } else {
2562 utf8decode(c, &unicodep, UTF_SIZ);
2563 width = wcwidth(unicodep);
2564 control = ISCONTROLC1(unicodep);
2565 ascii = unicodep;
2566 }
2567
2568 if(IS_SET(MODE_PRINT))
2569 tprinter(c, len);
2570 control = ISCONTROL(unicodep);
2571
2572 /*
2573 * STR sequence must be checked before anything else
2574 * because it uses all following characters until it
2575 * receives a ESC, a SUB, a ST or any other C1 control
2576 * character.
2577 */
2578 if(term.esc & ESC_STR) {
2579 if(width == 1 &&
2580 (ascii == '\a' || ascii == 030 ||
2581 ascii == 032 || ascii == 033 ||
2582 ISCONTROLC1(unicodep))) {
2583 term.esc &= ~(ESC_START|ESC_STR);
2584 term.esc |= ESC_STR_END;
2585 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2586 memmove(&strescseq.buf[strescseq.len], c, len);
2587 strescseq.len += len;
2588 return;
2589 } else {
2590 /*
2591 * Here is a bug in terminals. If the user never sends
2592 * some code to stop the str or esc command, then st
2593 * will stop responding. But this is better than
2594 * silently failing with unknown characters. At least
2595 * then users will report back.
2596 *
2597 * In the case users ever get fixed, here is the code:
2598 */
2599 /*
2600 * term.esc = 0;
2601 * strhandle();
2602 */
2603 return;
2604 }
2605 }
2606
2607 /*
2608 * Actions of control codes must be performed as soon they arrive
2609 * because they can be embedded inside a control sequence, and
2610 * they must not cause conflicts with sequences.
2611 */
2612 if(control) {
2613 tcontrolcode(ascii);
2614 /*
2615 * control codes are not shown ever
2616 */
2617 return;
2618 } else if(term.esc & ESC_START) {
2619 if(term.esc & ESC_CSI) {
2620 csiescseq.buf[csiescseq.len++] = ascii;
2621 if(BETWEEN(ascii, 0x40, 0x7E)
2622 || csiescseq.len >= \
2623 sizeof(csiescseq.buf)-1) {
2624 term.esc = 0;
2625 csiparse();
2626 csihandle();
2627 }
2628 return;
2629 } else if(term.esc & ESC_ALTCHARSET) {
2630 tdeftran(ascii);
2631 } else if(term.esc & ESC_TEST) {
2632 tdectest(ascii);
2633 } else {
2634 if (!eschandle(ascii))
2635 return;
2636 /* sequence already finished */
2637 }
2638 term.esc = 0;
2639 /*
2640 * All characters which form part of a sequence are not
2641 * printed
2642 */
2643 return;
2644 }
2645 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2646 selclear(NULL);
2647
2648 gp = &term.line[term.c.y][term.c.x];
2649 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2650 gp->mode |= ATTR_WRAP;
2651 tnewline(1);
2652 }
2653
2654 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2655 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2656
2657 if(term.c.x+width > term.col)
2658 tnewline(1);
2659
2660 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2661
2662 if(width == 2) {
2663 gp->mode |= ATTR_WIDE;
2664 if(term.c.x+1 < term.col) {
2665 gp[1].c[0] = '\0';
2666 gp[1].mode = ATTR_WDUMMY;
2667 }
2668 }
2669 if(term.c.x+width < term.col) {
2670 tmoveto(term.c.x+width, term.c.y);
2671 } else {
2672 term.c.state |= CURSOR_WRAPNEXT;
2673 }
2674 }
2675
2676 void
2677 tresize(int col, int row) {
2678 int i;
2679 int minrow = MIN(row, term.row);
2680 int mincol = MIN(col, term.col);
2681 int slide = term.c.y - row + 1;
2682 bool *bp;
2683 TCursor c;
2684
2685 if(col < 1 || row < 1) {
2686 fprintf(stderr,
2687 "tresize: error resizing to %dx%d\n", col, row);
2688 return;
2689 }
2690
2691 /* free unneeded rows */
2692 i = 0;
2693 if(slide > 0) {
2694 /*
2695 * slide screen to keep cursor where we expect it -
2696 * tscrollup would work here, but we can optimize to
2697 * memmove because we're freeing the earlier lines
2698 */
2699 for(/* i = 0 */; i < slide; i++) {
2700 free(term.line[i]);
2701 free(term.alt[i]);
2702 }
2703 memmove(term.line, term.line + slide, row * sizeof(Line));
2704 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2705 }
2706 for(i += row; i < term.row; i++) {
2707 free(term.line[i]);
2708 free(term.alt[i]);
2709 }
2710
2711 /* resize to new height */
2712 term.line = xrealloc(term.line, row * sizeof(Line));
2713 term.alt = xrealloc(term.alt, row * sizeof(Line));
2714 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2715 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2716
2717 /* resize each row to new width, zero-pad if needed */
2718 for(i = 0; i < minrow; i++) {
2719 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2720 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2721 }
2722
2723 /* allocate any new rows */
2724 for(/* i == minrow */; i < row; i++) {
2725 term.line[i] = xmalloc(col * sizeof(Glyph));
2726 term.alt[i] = xmalloc(col * sizeof(Glyph));
2727 }
2728 if(col > term.col) {
2729 bp = term.tabs + term.col;
2730
2731 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2732 while(--bp > term.tabs && !*bp)
2733 /* nothing */ ;
2734 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2735 *bp = 1;
2736 }
2737 /* update terminal size */
2738 term.col = col;
2739 term.row = row;
2740 /* reset scrolling region */
2741 tsetscroll(0, row-1);
2742 /* make use of the LIMIT in tmoveto */
2743 tmoveto(term.c.x, term.c.y);
2744 /* Clearing both screens (it makes dirty all lines) */
2745 c = term.c;
2746 for(i = 0; i < 2; i++) {
2747 if(mincol < col && 0 < minrow) {
2748 tclearregion(mincol, 0, col - 1, minrow - 1);
2749 }
2750 if(0 < col && minrow < row) {
2751 tclearregion(0, minrow, col - 1, row - 1);
2752 }
2753 tswapscreen();
2754 tcursor(CURSOR_LOAD);
2755 }
2756 term.c = c;
2757 }
2758
2759 void
2760 xresize(int col, int row) {
2761 xw.tw = MAX(1, col * xw.cw);
2762 xw.th = MAX(1, row * xw.ch);
2763
2764 XFreePixmap(xw.dpy, xw.buf);
2765 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2766 DefaultDepth(xw.dpy, xw.scr));
2767 XftDrawChange(xw.draw, xw.buf);
2768 xclear(0, 0, xw.w, xw.h);
2769 }
2770
2771 static inline ushort
2772 sixd_to_16bit(int x) {
2773 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2774 }
2775
2776 void
2777 xloadcols(void) {
2778 int i;
2779 XRenderColor color = { .alpha = 0xffff };
2780 static bool loaded;
2781 Color *cp;
2782
2783 if(loaded) {
2784 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2785 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2786 }
2787
2788 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2789 for(i = 0; i < LEN(colorname); i++) {
2790 if(!colorname[i])
2791 continue;
2792 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2793 die("Could not allocate color '%s'\n", colorname[i]);
2794 }
2795 }
2796
2797 /* load colors [16-231] ; same colors as xterm */
2798 for(i = 16; i < 6*6*6+16; i++) {
2799 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2800 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2801 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2802 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2803 die("Could not allocate color %d\n", i);
2804 }
2805
2806 /* load colors [232-255] ; grayscale */
2807 for(; i < 256; i++) {
2808 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2809 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2810 die("Could not allocate color %d\n", i);
2811 }
2812 loaded = true;
2813 }
2814
2815 int
2816 xsetcolorname(int x, const char *name) {
2817 XRenderColor color = { .alpha = 0xffff };
2818 Color ncolor;
2819
2820 if(!BETWEEN(x, 0, LEN(colorname)))
2821 return 1;
2822
2823 if(!name) {
2824 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2825 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2826 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2827 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2828 if(!XftColorAllocValue(xw.dpy, xw.vis,
2829 xw.cmap, &color, &ncolor)) {
2830 return 1;
2831 }
2832
2833 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2834 dc.col[x] = ncolor;
2835 return 0;
2836 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2837 color.red = color.green = color.blue = \
2838 0x0808 + 0x0a0a * (x - (16 + 216));
2839 if(!XftColorAllocValue(xw.dpy, xw.vis,
2840 xw.cmap, &color, &ncolor)) {
2841 return 1;
2842 }
2843
2844 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2845 dc.col[x] = ncolor;
2846 return 0;
2847 } else { /* system colors */
2848 name = colorname[x];
2849 }
2850 }
2851 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2852 return 1;
2853
2854 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2855 dc.col[x] = ncolor;
2856 return 0;
2857 }
2858
2859 void
2860 xtermclear(int col1, int row1, int col2, int row2) {
2861 XftDrawRect(xw.draw,
2862 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2863 borderpx + col1 * xw.cw,
2864 borderpx + row1 * xw.ch,
2865 (col2-col1+1) * xw.cw,
2866 (row2-row1+1) * xw.ch);
2867 }
2868
2869 /*
2870 * Absolute coordinates.
2871 */
2872 void
2873 xclear(int x1, int y1, int x2, int y2) {
2874 XftDrawRect(xw.draw,
2875 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2876 x1, y1, x2-x1, y2-y1);
2877 }
2878
2879 void
2880 xhints(void) {
2881 XClassHint class = {opt_class ? opt_class : termname, termname};
2882 XWMHints wm = {.flags = InputHint, .input = 1};
2883 XSizeHints *sizeh = NULL;
2884
2885 sizeh = XAllocSizeHints();
2886
2887 sizeh->flags = PSize | PResizeInc | PBaseSize;
2888 sizeh->height = xw.h;
2889 sizeh->width = xw.w;
2890 sizeh->height_inc = xw.ch;
2891 sizeh->width_inc = xw.cw;
2892 sizeh->base_height = 2 * borderpx;
2893 sizeh->base_width = 2 * borderpx;
2894 if(xw.isfixed == True) {
2895 sizeh->flags |= PMaxSize | PMinSize;
2896 sizeh->min_width = sizeh->max_width = xw.w;
2897 sizeh->min_height = sizeh->max_height = xw.h;
2898 }
2899 if(xw.gm & (XValue|YValue)) {
2900 sizeh->flags |= USPosition | PWinGravity;
2901 sizeh->x = xw.l;
2902 sizeh->y = xw.t;
2903 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2904 }
2905
2906 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2907 &class);
2908 XFree(sizeh);
2909 }
2910
2911 int
2912 xgeommasktogravity(int mask) {
2913 switch(mask & (XNegative|YNegative)) {
2914 case 0:
2915 return NorthWestGravity;
2916 case XNegative:
2917 return NorthEastGravity;
2918 case YNegative:
2919 return SouthWestGravity;
2920 }
2921 return SouthEastGravity;
2922 }
2923
2924 int
2925 xloadfont(Font *f, FcPattern *pattern) {
2926 FcPattern *match;
2927 FcResult result;
2928
2929 match = FcFontMatch(NULL, pattern, &result);
2930 if(!match)
2931 return 1;
2932
2933 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2934 FcPatternDestroy(match);
2935 return 1;
2936 }
2937
2938 f->set = NULL;
2939 f->pattern = FcPatternDuplicate(pattern);
2940
2941 f->ascent = f->match->ascent;
2942 f->descent = f->match->descent;
2943 f->lbearing = 0;
2944 f->rbearing = f->match->max_advance_width;
2945
2946 f->height = f->ascent + f->descent;
2947 f->width = f->lbearing + f->rbearing;
2948
2949 return 0;
2950 }
2951
2952 void
2953 xloadfonts(char *fontstr, double fontsize) {
2954 FcPattern *pattern;
2955 FcResult r_sz, r_psz;
2956 double fontval;
2957 float ceilf(float);
2958
2959 if(fontstr[0] == '-') {
2960 pattern = XftXlfdParse(fontstr, False, False);
2961 } else {
2962 pattern = FcNameParse((FcChar8 *)fontstr);
2963 }
2964
2965 if(!pattern)
2966 die("st: can't open font %s\n", fontstr);
2967
2968 if(fontsize > 0) {
2969 FcPatternDel(pattern, FC_PIXEL_SIZE);
2970 FcPatternDel(pattern, FC_SIZE);
2971 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2972 usedfontsize = fontsize;
2973 } else {
2974 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2975 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2976 if(r_psz == FcResultMatch) {
2977 usedfontsize = fontval;
2978 } else if(r_sz == FcResultMatch) {
2979 usedfontsize = -1;
2980 } else {
2981 /*
2982 * Default font size is 12, if none given. This is to
2983 * have a known usedfontsize value.
2984 */
2985 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2986 usedfontsize = 12;
2987 }
2988 }
2989
2990 FcConfigSubstitute(0, pattern, FcMatchPattern);
2991 FcDefaultSubstitute(pattern);
2992
2993 if(xloadfont(&dc.font, pattern))
2994 die("st: can't open font %s\n", fontstr);
2995
2996 if(usedfontsize < 0) {
2997 FcPatternGetDouble(dc.font.match->pattern,
2998 FC_PIXEL_SIZE, 0, &fontval);
2999 usedfontsize = fontval;
3000 }
3001
3002 /* Setting character width and height. */
3003 xw.cw = ceilf(dc.font.width * cwscale);
3004 xw.ch = ceilf(dc.font.height * chscale);
3005
3006 FcPatternDel(pattern, FC_SLANT);
3007 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3008 if(xloadfont(&dc.ifont, pattern))
3009 die("st: can't open font %s\n", fontstr);
3010
3011 FcPatternDel(pattern, FC_WEIGHT);
3012 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3013 if(xloadfont(&dc.ibfont, pattern))
3014 die("st: can't open font %s\n", fontstr);
3015
3016 FcPatternDel(pattern, FC_SLANT);
3017 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3018 if(xloadfont(&dc.bfont, pattern))
3019 die("st: can't open font %s\n", fontstr);
3020
3021 FcPatternDestroy(pattern);
3022 }
3023
3024 int
3025 xloadfontset(Font *f) {
3026 FcResult result;
3027
3028 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3029 return 1;
3030 return 0;
3031 }
3032
3033 void
3034 xunloadfont(Font *f) {
3035 XftFontClose(xw.dpy, f->match);
3036 FcPatternDestroy(f->pattern);
3037 if(f->set)
3038 FcFontSetDestroy(f->set);
3039 }
3040
3041 void
3042 xunloadfonts(void) {
3043 /* Free the loaded fonts in the font cache. */
3044 while(frclen > 0)
3045 XftFontClose(xw.dpy, frc[--frclen].font);
3046
3047 xunloadfont(&dc.font);
3048 xunloadfont(&dc.bfont);
3049 xunloadfont(&dc.ifont);
3050 xunloadfont(&dc.ibfont);
3051 }
3052
3053 void
3054 xzoom(const Arg *arg) {
3055 xunloadfonts();
3056 xloadfonts(usedfont, usedfontsize + arg->i);
3057 cresize(0, 0);
3058 redraw(0);
3059 xhints();
3060 }
3061
3062 void
3063 xinit(void) {
3064 XGCValues gcvalues;
3065 Cursor cursor;
3066 Window parent;
3067 pid_t thispid = getpid();
3068
3069 if(!(xw.dpy = XOpenDisplay(NULL)))
3070 die("Can't open display\n");
3071 xw.scr = XDefaultScreen(xw.dpy);
3072 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3073
3074 /* font */
3075 if(!FcInit())
3076 die("Could not init fontconfig.\n");
3077
3078 usedfont = (opt_font == NULL)? font : opt_font;
3079 xloadfonts(usedfont, 0);
3080
3081 /* colors */
3082 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3083 xloadcols();
3084
3085 /* adjust fixed window geometry */
3086 xw.w = 2 * borderpx + term.col * xw.cw;
3087 xw.h = 2 * borderpx + term.row * xw.ch;
3088 if(xw.gm & XNegative)
3089 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3090 if(xw.gm & YNegative)
3091 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3092
3093 /* Events */
3094 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3095 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3096 xw.attrs.bit_gravity = NorthWestGravity;
3097 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3098 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3099 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3100 xw.attrs.colormap = xw.cmap;
3101
3102 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3103 XRootWindow(xw.dpy, xw.scr);
3104 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3105 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3106 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3107 | CWEventMask | CWColormap, &xw.attrs);
3108
3109 memset(&gcvalues, 0, sizeof(gcvalues));
3110 gcvalues.graphics_exposures = False;
3111 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3112 &gcvalues);
3113 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3114 DefaultDepth(xw.dpy, xw.scr));
3115 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3116 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3117
3118 /* Xft rendering context */
3119 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3120
3121 /* input methods */
3122 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3123 XSetLocaleModifiers("@im=local");
3124 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3125 XSetLocaleModifiers("@im=");
3126 if((xw.xim = XOpenIM(xw.dpy,
3127 NULL, NULL, NULL)) == NULL) {
3128 die("XOpenIM failed. Could not open input"
3129 " device.\n");
3130 }
3131 }
3132 }
3133 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3134 | XIMStatusNothing, XNClientWindow, xw.win,
3135 XNFocusWindow, xw.win, NULL);
3136 if(xw.xic == NULL)
3137 die("XCreateIC failed. Could not obtain input method.\n");
3138
3139 /* white cursor, black outline */
3140 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3141 XDefineCursor(xw.dpy, xw.win, cursor);
3142 XRecolorCursor(xw.dpy, cursor,
3143 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3144 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3145
3146 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3147 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3148 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3149 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3150
3151 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3152 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3153 PropModeReplace, (uchar *)&thispid, 1);
3154
3155 xresettitle();
3156 XMapWindow(xw.dpy, xw.win);
3157 xhints();
3158 XSync(xw.dpy, False);
3159 }
3160
3161 void
3162 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3163 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3164 width = charlen * xw.cw, xp, i;
3165 int frcflags;
3166 int u8fl, u8fblen, u8cblen, doesexist;
3167 char *u8c, *u8fs;
3168 long unicodep;
3169 Font *font = &dc.font;
3170 FcResult fcres;
3171 FcPattern *fcpattern, *fontpattern;
3172 FcFontSet *fcsets[] = { NULL };
3173 FcCharSet *fccharset;
3174 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3175 XRenderColor colfg, colbg;
3176 XRectangle r;
3177 int oneatatime;
3178
3179 frcflags = FRC_NORMAL;
3180
3181 if(base.mode & ATTR_ITALIC) {
3182 if(base.fg == defaultfg)
3183 base.fg = defaultitalic;
3184 font = &dc.ifont;
3185 frcflags = FRC_ITALIC;
3186 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3187 if(base.fg == defaultfg)
3188 base.fg = defaultitalic;
3189 font = &dc.ibfont;
3190 frcflags = FRC_ITALICBOLD;
3191 } else if(base.mode & ATTR_UNDERLINE) {
3192 if(base.fg == defaultfg)
3193 base.fg = defaultunderline;
3194 }
3195
3196 if(IS_TRUECOL(base.fg)) {
3197 colfg.alpha = 0xffff;
3198 colfg.red = TRUERED(base.fg);
3199 colfg.green = TRUEGREEN(base.fg);
3200 colfg.blue = TRUEBLUE(base.fg);
3201 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3202 fg = &truefg;
3203 } else {
3204 fg = &dc.col[base.fg];
3205 }
3206
3207 if(IS_TRUECOL(base.bg)) {
3208 colbg.alpha = 0xffff;
3209 colbg.green = TRUEGREEN(base.bg);
3210 colbg.red = TRUERED(base.bg);
3211 colbg.blue = TRUEBLUE(base.bg);
3212 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3213 bg = &truebg;
3214 } else {
3215 bg = &dc.col[base.bg];
3216 }
3217
3218 if(base.mode & ATTR_BOLD) {
3219 /*
3220 * change basic system colors [0-7]
3221 * to bright system colors [8-15]
3222 */
3223 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3224 fg = &dc.col[base.fg + 8];
3225
3226 if(base.mode & ATTR_ITALIC) {
3227 font = &dc.ibfont;
3228 frcflags = FRC_ITALICBOLD;
3229 } else {
3230 font = &dc.bfont;
3231 frcflags = FRC_BOLD;
3232 }
3233 }
3234
3235 if(IS_SET(MODE_REVERSE)) {
3236 if(fg == &dc.col[defaultfg]) {
3237 fg = &dc.col[defaultbg];
3238 } else {
3239 colfg.red = ~fg->color.red;
3240 colfg.green = ~fg->color.green;
3241 colfg.blue = ~fg->color.blue;
3242 colfg.alpha = fg->color.alpha;
3243 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3244 &revfg);
3245 fg = &revfg;
3246 }
3247
3248 if(bg == &dc.col[defaultbg]) {
3249 bg = &dc.col[defaultfg];
3250 } else {
3251 colbg.red = ~bg->color.red;
3252 colbg.green = ~bg->color.green;
3253 colbg.blue = ~bg->color.blue;
3254 colbg.alpha = bg->color.alpha;
3255 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3256 &revbg);
3257 bg = &revbg;
3258 }
3259 }
3260
3261 if(base.mode & ATTR_REVERSE) {
3262 temp = fg;
3263 fg = bg;
3264 bg = temp;
3265 }
3266
3267 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3268 colfg.red = fg->color.red / 2;
3269 colfg.green = fg->color.green / 2;
3270 colfg.blue = fg->color.blue / 2;
3271 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3272 fg = &revfg;
3273 }
3274
3275 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3276 fg = bg;
3277
3278 if(base.mode & ATTR_INVISIBLE)
3279 fg = bg;
3280
3281 /* Intelligent cleaning up of the borders. */
3282 if(x == 0) {
3283 xclear(0, (y == 0)? 0 : winy, borderpx,
3284 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3285 }
3286 if(x + charlen >= term.col) {
3287 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3288 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3289 }
3290 if(y == 0)
3291 xclear(winx, 0, winx + width, borderpx);
3292 if(y == term.row-1)
3293 xclear(winx, winy + xw.ch, winx + width, xw.h);
3294
3295 /* Clean up the region we want to draw to. */
3296 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3297
3298 /* Set the clip region because Xft is sometimes dirty. */
3299 r.x = 0;
3300 r.y = 0;
3301 r.height = xw.ch;
3302 r.width = width;
3303 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3304
3305 for(xp = winx; bytelen > 0;) {
3306 /*
3307 * Search for the range in the to be printed string of glyphs
3308 * that are in the main font. Then print that range. If
3309 * some glyph is found that is not in the font, do the
3310 * fallback dance.
3311 */
3312 u8fs = s;
3313 u8fblen = 0;
3314 u8fl = 0;
3315 oneatatime = font->width != xw.cw;
3316 for(;;) {
3317 u8c = s;
3318 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3319 s += u8cblen;
3320 bytelen -= u8cblen;
3321
3322 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3323 if(doesexist) {
3324 u8fl++;
3325 u8fblen += u8cblen;
3326 if(!oneatatime && bytelen > 0)
3327 continue;
3328 }
3329
3330 if(u8fl > 0) {
3331 XftDrawStringUtf8(xw.draw, fg,
3332 font->match, xp,
3333 winy + font->ascent,
3334 (FcChar8 *)u8fs,
3335 u8fblen);
3336 xp += xw.cw * u8fl;
3337 }
3338 break;
3339 }
3340 if(doesexist) {
3341 if(oneatatime)
3342 continue;
3343 break;
3344 }
3345
3346 /* Search the font cache. */
3347 for(i = 0; i < frclen; i++) {
3348 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3349 && frc[i].flags == frcflags) {
3350 break;
3351 }
3352 }
3353
3354 /* Nothing was found. */
3355 if(i >= frclen) {
3356 if(!font->set)
3357 xloadfontset(font);
3358 fcsets[0] = font->set;
3359
3360 /*
3361 * Nothing was found in the cache. Now use
3362 * some dozen of Fontconfig calls to get the
3363 * font for one single character.
3364 *
3365 * Xft and fontconfig are design failures.
3366 */
3367 fcpattern = FcPatternDuplicate(font->pattern);
3368 fccharset = FcCharSetCreate();
3369
3370 FcCharSetAddChar(fccharset, unicodep);
3371 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3372 fccharset);
3373 FcPatternAddBool(fcpattern, FC_SCALABLE,
3374 FcTrue);
3375
3376 FcConfigSubstitute(0, fcpattern,
3377 FcMatchPattern);
3378 FcDefaultSubstitute(fcpattern);
3379
3380 fontpattern = FcFontSetMatch(0, fcsets,
3381 FcTrue, fcpattern, &fcres);
3382
3383 /*
3384 * Overwrite or create the new cache entry.
3385 */
3386 if(frclen >= LEN(frc)) {
3387 frclen = LEN(frc) - 1;
3388 XftFontClose(xw.dpy, frc[frclen].font);
3389 }
3390
3391 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3392 fontpattern);
3393 frc[frclen].flags = frcflags;
3394
3395 i = frclen;
3396 frclen++;
3397
3398 FcPatternDestroy(fcpattern);
3399 FcCharSetDestroy(fccharset);
3400 }
3401
3402 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3403 xp, winy + frc[i].font->ascent,
3404 (FcChar8 *)u8c, u8cblen);
3405
3406 xp += xw.cw * wcwidth(unicodep);
3407 }
3408
3409 /*
3410 * This is how the loop above actually should be. Why does the
3411 * application have to care about font details?
3412 *
3413 * I have to repeat: Xft and Fontconfig are design failures.
3414 */
3415 /*
3416 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3417 winy + font->ascent, (FcChar8 *)s, bytelen);
3418 */
3419
3420 if(base.mode & ATTR_UNDERLINE) {
3421 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3422 width, 1);
3423 }
3424
3425 if(base.mode & ATTR_STRUCK) {
3426 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3427 width, 1);
3428 }
3429
3430 /* Reset clip to none. */
3431 XftDrawSetClip(xw.draw, 0);
3432 }
3433
3434 void
3435 xdrawcursor(void) {
3436 static int oldx = 0, oldy = 0;
3437 int sl, width, curx;
3438 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3439
3440 LIMIT(oldx, 0, term.col-1);
3441 LIMIT(oldy, 0, term.row-1);
3442
3443 curx = term.c.x;
3444
3445 /* adjust position if in dummy */
3446 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3447 oldx--;
3448 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3449 curx--;
3450
3451 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3452
3453 /* remove the old cursor */
3454 sl = utf8len(term.line[oldy][oldx].c);
3455 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3456 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3457 oldy, width, sl);
3458
3459 /* draw the new one */
3460 if(!(IS_SET(MODE_HIDE))) {
3461 if(xw.state & WIN_FOCUSED) {
3462 if(IS_SET(MODE_REVERSE)) {
3463 g.mode |= ATTR_REVERSE;
3464 g.fg = defaultcs;
3465 g.bg = defaultfg;
3466 }
3467
3468 sl = utf8len(g.c);
3469 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3470 ? 2 : 1;
3471 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3472 } else {
3473 XftDrawRect(xw.draw, &dc.col[defaultcs],
3474 borderpx + curx * xw.cw,
3475 borderpx + term.c.y * xw.ch,
3476 xw.cw - 1, 1);
3477 XftDrawRect(xw.draw, &dc.col[defaultcs],
3478 borderpx + curx * xw.cw,
3479 borderpx + term.c.y * xw.ch,
3480 1, xw.ch - 1);
3481 XftDrawRect(xw.draw, &dc.col[defaultcs],
3482 borderpx + (curx + 1) * xw.cw - 1,
3483 borderpx + term.c.y * xw.ch,
3484 1, xw.ch - 1);
3485 XftDrawRect(xw.draw, &dc.col[defaultcs],
3486 borderpx + curx * xw.cw,
3487 borderpx + (term.c.y + 1) * xw.ch - 1,
3488 xw.cw, 1);
3489 }
3490 oldx = curx, oldy = term.c.y;
3491 }
3492 }
3493
3494
3495 void
3496 xsettitle(char *p) {
3497 XTextProperty prop;
3498
3499 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3500 &prop);
3501 XSetWMName(xw.dpy, xw.win, &prop);
3502 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3503 XFree(prop.value);
3504 }
3505
3506 void
3507 xresettitle(void) {
3508 xsettitle(opt_title ? opt_title : "st");
3509 }
3510
3511 void
3512 redraw(int timeout) {
3513 struct timespec tv = {0, timeout * 1000};
3514
3515 tfulldirt();
3516 draw();
3517
3518 if(timeout > 0) {
3519 nanosleep(&tv, NULL);
3520 XSync(xw.dpy, False); /* necessary for a good tput flash */
3521 }
3522 }
3523
3524 void
3525 draw(void) {
3526 drawregion(0, 0, term.col, term.row);
3527 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3528 xw.h, 0, 0);
3529 XSetForeground(xw.dpy, dc.gc,
3530 dc.col[IS_SET(MODE_REVERSE)?
3531 defaultfg : defaultbg].pixel);
3532 }
3533
3534 void
3535 drawregion(int x1, int y1, int x2, int y2) {
3536 int ic, ib, x, y, ox, sl;
3537 Glyph base, new;
3538 char buf[DRAW_BUF_SIZ];
3539 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3540 long unicodep;
3541
3542 if(!(xw.state & WIN_VISIBLE))
3543 return;
3544
3545 for(y = y1; y < y2; y++) {
3546 if(!term.dirty[y])
3547 continue;
3548
3549 xtermclear(0, y, term.col, y);
3550 term.dirty[y] = 0;
3551 base = term.line[y][0];
3552 ic = ib = ox = 0;
3553 for(x = x1; x < x2; x++) {
3554 new = term.line[y][x];
3555 if(new.mode == ATTR_WDUMMY)
3556 continue;
3557 if(ena_sel && selected(x, y))
3558 new.mode ^= ATTR_REVERSE;
3559 if(ib > 0 && (ATTRCMP(base, new)
3560 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3561 xdraws(buf, base, ox, y, ic, ib);
3562 ic = ib = 0;
3563 }
3564 if(ib == 0) {
3565 ox = x;
3566 base = new;
3567 }
3568
3569 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3570 memcpy(buf+ib, new.c, sl);
3571 ib += sl;
3572 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3573 }
3574 if(ib > 0)
3575 xdraws(buf, base, ox, y, ic, ib);
3576 }
3577 xdrawcursor();
3578 }
3579
3580 void
3581 expose(XEvent *ev) {
3582 XExposeEvent *e = &ev->xexpose;
3583
3584 if(xw.state & WIN_REDRAW) {
3585 if(!e->count)
3586 xw.state &= ~WIN_REDRAW;
3587 }
3588 redraw(0);
3589 }
3590
3591 void
3592 visibility(XEvent *ev) {
3593 XVisibilityEvent *e = &ev->xvisibility;
3594
3595 if(e->state == VisibilityFullyObscured) {
3596 xw.state &= ~WIN_VISIBLE;
3597 } else if(!(xw.state & WIN_VISIBLE)) {
3598 /* need a full redraw for next Expose, not just a buf copy */
3599 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3600 }
3601 }
3602
3603 void
3604 unmap(XEvent *ev) {
3605 xw.state &= ~WIN_VISIBLE;
3606 }
3607
3608 void
3609 xsetpointermotion(int set) {
3610 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3611 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3612 }
3613
3614 void
3615 xseturgency(int add) {
3616 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3617
3618 MODBIT(h->flags, add, XUrgencyHint);
3619 XSetWMHints(xw.dpy, xw.win, h);
3620 XFree(h);
3621 }
3622
3623 void
3624 focus(XEvent *ev) {
3625 XFocusChangeEvent *e = &ev->xfocus;
3626
3627 if(e->mode == NotifyGrab)
3628 return;
3629
3630 if(ev->type == FocusIn) {
3631 XSetICFocus(xw.xic);
3632 xw.state |= WIN_FOCUSED;
3633 xseturgency(0);
3634 if(IS_SET(MODE_FOCUS))
3635 ttywrite("\033[I", 3);
3636 } else {
3637 XUnsetICFocus(xw.xic);
3638 xw.state &= ~WIN_FOCUSED;
3639 if(IS_SET(MODE_FOCUS))
3640 ttywrite("\033[O", 3);
3641 }
3642 }
3643
3644 static inline bool
3645 match(uint mask, uint state) {
3646 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3647 }
3648
3649 void
3650 numlock(const Arg *dummy) {
3651 term.numlock ^= 1;
3652 }
3653
3654 char*
3655 kmap(KeySym k, uint state) {
3656 Key *kp;
3657 int i;
3658
3659 /* Check for mapped keys out of X11 function keys. */
3660 for(i = 0; i < LEN(mappedkeys); i++) {
3661 if(mappedkeys[i] == k)
3662 break;
3663 }
3664 if(i == LEN(mappedkeys)) {
3665 if((k & 0xFFFF) < 0xFD00)
3666 return NULL;
3667 }
3668
3669 for(kp = key; kp < key + LEN(key); kp++) {
3670 if(kp->k != k)
3671 continue;
3672
3673 if(!match(kp->mask, state))
3674 continue;
3675
3676 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3677 continue;
3678 if(term.numlock && kp->appkey == 2)
3679 continue;
3680
3681 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3682 continue;
3683
3684 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3685 continue;
3686
3687 return kp->s;
3688 }
3689
3690 return NULL;
3691 }
3692
3693 void
3694 kpress(XEvent *ev) {
3695 XKeyEvent *e = &ev->xkey;
3696 KeySym ksym;
3697 char buf[32], *customkey;
3698 int len;
3699 long c;
3700 Status status;
3701 Shortcut *bp;
3702
3703 if(IS_SET(MODE_KBDLOCK))
3704 return;
3705
3706 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3707 /* 1. shortcuts */
3708 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3709 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3710 bp->func(&(bp->arg));
3711 return;
3712 }
3713 }
3714
3715 /* 2. custom keys from config.h */
3716 if((customkey = kmap(ksym, e->state))) {
3717 ttysend(customkey, strlen(customkey));
3718 return;
3719 }
3720
3721 /* 3. composed string from input method */
3722 if(len == 0)
3723 return;
3724 if(len == 1 && e->state & Mod1Mask) {
3725 if(IS_SET(MODE_8BIT)) {
3726 if(*buf < 0177) {
3727 c = *buf | 0x80;
3728 len = utf8encode(c, buf, UTF_SIZ);
3729 }
3730 } else {
3731 buf[1] = buf[0];
3732 buf[0] = '\033';
3733 len = 2;
3734 }
3735 }
3736 ttysend(buf, len);
3737 }
3738
3739
3740 void
3741 cmessage(XEvent *e) {
3742 /*
3743 * See xembed specs
3744 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3745 */
3746 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3747 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3748 xw.state |= WIN_FOCUSED;
3749 xseturgency(0);
3750 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3751 xw.state &= ~WIN_FOCUSED;
3752 }
3753 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3754 /* Send SIGHUP to shell */
3755 kill(pid, SIGHUP);
3756 exit(EXIT_SUCCESS);
3757 }
3758 }
3759
3760 void
3761 cresize(int width, int height) {
3762 int col, row;
3763
3764 if(width != 0)
3765 xw.w = width;
3766 if(height != 0)
3767 xw.h = height;
3768
3769 col = (xw.w - 2 * borderpx) / xw.cw;
3770 row = (xw.h - 2 * borderpx) / xw.ch;
3771
3772 tresize(col, row);
3773 xresize(col, row);
3774 ttyresize();
3775 }
3776
3777 void
3778 resize(XEvent *e) {
3779 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3780 return;
3781
3782 cresize(e->xconfigure.width, e->xconfigure.height);
3783 }
3784
3785 void
3786 run(void) {
3787 XEvent ev;
3788 int w = xw.w, h = xw.h;
3789 fd_set rfd;
3790 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3791 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3792 long deltatime;
3793
3794 /* Waiting for window mapping */
3795 while(1) {
3796 XNextEvent(xw.dpy, &ev);
3797 if(XFilterEvent(&ev, None))
3798 continue;
3799 if(ev.type == ConfigureNotify) {
3800 w = ev.xconfigure.width;
3801 h = ev.xconfigure.height;
3802 } else if(ev.type == MapNotify) {
3803 break;
3804 }
3805 }
3806
3807 ttynew();
3808 cresize(w, h);
3809
3810 clock_gettime(CLOCK_MONOTONIC, &last);
3811 lastblink = last;
3812
3813 for(xev = actionfps;;) {
3814 FD_ZERO(&rfd);
3815 FD_SET(cmdfd, &rfd);
3816 FD_SET(xfd, &rfd);
3817
3818 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3819 if(errno == EINTR)
3820 continue;
3821 die("select failed: %s\n", strerror(errno));
3822 }
3823 if(FD_ISSET(cmdfd, &rfd)) {
3824 ttyread();
3825 if(blinktimeout) {
3826 blinkset = tattrset(ATTR_BLINK);
3827 if(!blinkset)
3828 MODBIT(term.mode, 0, MODE_BLINK);
3829 }
3830 }
3831
3832 if(FD_ISSET(xfd, &rfd))
3833 xev = actionfps;
3834
3835 clock_gettime(CLOCK_MONOTONIC, &now);
3836 drawtimeout.tv_sec = 0;
3837 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3838 tv = &drawtimeout;
3839
3840 dodraw = 0;
3841 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3842 tsetdirtattr(ATTR_BLINK);
3843 term.mode ^= MODE_BLINK;
3844 lastblink = now;
3845 dodraw = 1;
3846 }
3847 deltatime = TIMEDIFF(now, last);
3848 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3849 || deltatime < 0) {
3850 dodraw = 1;
3851 last = now;
3852 }
3853
3854 if(dodraw) {
3855 while(XPending(xw.dpy)) {
3856 XNextEvent(xw.dpy, &ev);
3857 if(XFilterEvent(&ev, None))
3858 continue;
3859 if(handler[ev.type])
3860 (handler[ev.type])(&ev);
3861 }
3862
3863 draw();
3864 XFlush(xw.dpy);
3865
3866 if(xev && !FD_ISSET(xfd, &rfd))
3867 xev--;
3868 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3869 if(blinkset) {
3870 if(TIMEDIFF(now, lastblink) \
3871 > blinktimeout) {
3872 drawtimeout.tv_nsec = 1000;
3873 } else {
3874 drawtimeout.tv_nsec = (1E6 * \
3875 (blinktimeout - \
3876 TIMEDIFF(now,
3877 lastblink)));
3878 }
3879 } else {
3880 tv = NULL;
3881 }
3882 }
3883 }
3884 }
3885 }
3886
3887 void
3888 usage(void) {
3889 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3890 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3891 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3892 }
3893
3894 int
3895 main(int argc, char *argv[]) {
3896 char *titles;
3897 uint cols = 80, rows = 24;
3898
3899 xw.l = xw.t = 0;
3900 xw.isfixed = False;
3901
3902 ARGBEGIN {
3903 case 'a':
3904 allowaltscreen = false;
3905 break;
3906 case 'c':
3907 opt_class = EARGF(usage());
3908 break;
3909 case 'e':
3910 /* eat all remaining arguments */
3911 if(argc > 1) {
3912 opt_cmd = &argv[1];
3913 if(argv[1] != NULL && opt_title == NULL) {
3914 titles = xstrdup(argv[1]);
3915 opt_title = basename(titles);
3916 }
3917 }
3918 goto run;
3919 case 'f':
3920 opt_font = EARGF(usage());
3921 break;
3922 case 'g':
3923 xw.gm = XParseGeometry(EARGF(usage()),
3924 &xw.l, &xw.t, &cols, &rows);
3925 break;
3926 case 'i':
3927 xw.isfixed = True;
3928 break;
3929 case 'o':
3930 opt_io = EARGF(usage());
3931 break;
3932 case 't':
3933 opt_title = EARGF(usage());
3934 break;
3935 case 'w':
3936 opt_embed = EARGF(usage());
3937 break;
3938 case 'v':
3939 default:
3940 usage();
3941 } ARGEND;
3942
3943 run:
3944 setlocale(LC_CTYPE, "");
3945 XSetLocaleModifiers("");
3946 tnew(cols? cols : 1, rows? rows : 1);
3947 xinit();
3948 selinit();
3949 run();
3950
3951 return 0;
3952 }
3953