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Improve readability of enum members
[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 /* expand selection over line breaks */
686 if (sel.type == SEL_RECTANGULAR)
687 return;
688 i = tlinelen(sel.nb.y);
689 if (i < sel.nb.x)
690 sel.nb.x = i;
691 if (tlinelen(sel.ne.y) <= sel.ne.x)
692 sel.ne.x = term.col - 1;
693 }
694
695 static inline bool
696 selected(int x, int y) {
697 if(sel.type == SEL_RECTANGULAR)
698 return BETWEEN(y, sel.nb.y, sel.ne.y)
699 && BETWEEN(x, sel.nb.x, sel.ne.x);
700
701 return BETWEEN(y, sel.nb.y, sel.ne.y)
702 && (y != sel.nb.y || x >= sel.nb.x)
703 && (y != sel.ne.y || x <= sel.ne.x);
704 }
705
706 void
707 selsnap(int mode, int *x, int *y, int direction) {
708 int newx, newy, xt, yt;
709 Glyph *gp;
710
711 switch(mode) {
712 case SNAP_WORD:
713 /*
714 * Snap around if the word wraps around at the end or
715 * beginning of a line.
716 */
717 for(;;) {
718 newx = *x + direction;
719 newy = *y;
720 if(!BETWEEN(newx, 0, term.col - 1)) {
721 newy += direction;
722 newx = (newx + term.col) % term.col;
723 if (!BETWEEN(newy, 0, term.row - 1))
724 break;
725
726 if(direction > 0)
727 yt = *y, xt = *x;
728 else
729 yt = newy, xt = newx;
730 if(!(term.line[yt][xt].mode & ATTR_WRAP))
731 break;
732 }
733
734 if (newx >= tlinelen(newy))
735 break;
736
737 gp = &term.line[newy][newx];
738 if (!(gp->mode & ATTR_WDUMMY) && strchr(worddelimiters, gp->c[0]))
739 break;
740
741 *x = newx;
742 *y = newy;
743 }
744 break;
745 case SNAP_LINE:
746 /*
747 * Snap around if the the previous line or the current one
748 * has set ATTR_WRAP at its end. Then the whole next or
749 * previous line will be selected.
750 */
751 *x = (direction < 0) ? 0 : term.col - 1;
752 if(direction < 0 && *y > 0) {
753 for(; *y > 0; *y += direction) {
754 if(!(term.line[*y-1][term.col-1].mode
755 & ATTR_WRAP)) {
756 break;
757 }
758 }
759 } else if(direction > 0 && *y < term.row-1) {
760 for(; *y < term.row; *y += direction) {
761 if(!(term.line[*y][term.col-1].mode
762 & ATTR_WRAP)) {
763 break;
764 }
765 }
766 }
767 break;
768 }
769 }
770
771 void
772 getbuttoninfo(XEvent *e) {
773 int type;
774 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
775
776 sel.alt = IS_SET(MODE_ALTSCREEN);
777
778 sel.oe.x = x2col(e->xbutton.x);
779 sel.oe.y = y2row(e->xbutton.y);
780
781 if(sel.ob.y < sel.oe.y
782 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
783 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
784 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
785 } else {
786 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
787 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
788 }
789 selnormalize();
790
791 sel.type = SEL_REGULAR;
792 for(type = 1; type < LEN(selmasks); ++type) {
793 if(match(selmasks[type], state)) {
794 sel.type = type;
795 break;
796 }
797 }
798 }
799
800 void
801 mousereport(XEvent *e) {
802 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
803 button = e->xbutton.button, state = e->xbutton.state,
804 len;
805 char buf[40];
806 static int ox, oy;
807
808 /* from urxvt */
809 if(e->xbutton.type == MotionNotify) {
810 if(x == ox && y == oy)
811 return;
812 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
813 return;
814 /* MOUSE_MOTION: no reporting if no button is pressed */
815 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
816 return;
817
818 button = oldbutton + 32;
819 ox = x;
820 oy = y;
821 } else {
822 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
823 button = 3;
824 } else {
825 button -= Button1;
826 if(button >= 3)
827 button += 64 - 3;
828 }
829 if(e->xbutton.type == ButtonPress) {
830 oldbutton = button;
831 ox = x;
832 oy = y;
833 } else if(e->xbutton.type == ButtonRelease) {
834 oldbutton = 3;
835 /* MODE_MOUSEX10: no button release reporting */
836 if(IS_SET(MODE_MOUSEX10))
837 return;
838 if (button == 64 || button == 65)
839 return;
840 }
841 }
842
843 if(!IS_SET(MODE_MOUSEX10)) {
844 button += (state & ShiftMask ? 4 : 0)
845 + (state & Mod4Mask ? 8 : 0)
846 + (state & ControlMask ? 16 : 0);
847 }
848
849 len = 0;
850 if(IS_SET(MODE_MOUSESGR)) {
851 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
852 button, x+1, y+1,
853 e->xbutton.type == ButtonRelease ? 'm' : 'M');
854 } else if(x < 223 && y < 223) {
855 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
856 32+button, 32+x+1, 32+y+1);
857 } else {
858 return;
859 }
860
861 ttywrite(buf, len);
862 }
863
864 void
865 bpress(XEvent *e) {
866 struct timespec now;
867 Mousekey *mk;
868
869 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
870 mousereport(e);
871 return;
872 }
873
874 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
875 if(e->xbutton.button == mk->b
876 && match(mk->mask, e->xbutton.state)) {
877 ttysend(mk->s, strlen(mk->s));
878 return;
879 }
880 }
881
882 if(e->xbutton.button == Button1) {
883 clock_gettime(CLOCK_MONOTONIC, &now);
884
885 /* Clear previous selection, logically and visually. */
886 selclear(NULL);
887 sel.mode = 1;
888 sel.type = SEL_REGULAR;
889 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
890 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
891
892 /*
893 * If the user clicks below predefined timeouts specific
894 * snapping behaviour is exposed.
895 */
896 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
897 sel.snap = SNAP_LINE;
898 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
899 sel.snap = SNAP_WORD;
900 } else {
901 sel.snap = 0;
902 }
903 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
904 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
905 selnormalize();
906
907 /*
908 * Draw selection, unless it's regular and we don't want to
909 * make clicks visible
910 */
911 if(sel.snap != 0) {
912 sel.mode++;
913 tsetdirt(sel.nb.y, sel.ne.y);
914 }
915 sel.tclick2 = sel.tclick1;
916 sel.tclick1 = now;
917 }
918 }
919
920 char *
921 getsel(void) {
922 char *str, *ptr;
923 int y, bufsize, size, lastx, linelen;
924 Glyph *gp, *last;
925
926 if(sel.ob.x == -1)
927 return NULL;
928
929 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
930 ptr = str = xmalloc(bufsize);
931
932 /* append every set & selected glyph to the selection */
933 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
934 linelen = tlinelen(y);
935
936 if(sel.type == SEL_RECTANGULAR) {
937 gp = &term.line[y][sel.nb.x];
938 lastx = sel.ne.x;
939 } else {
940 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
941 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
942 }
943 last = &term.line[y][MIN(lastx, linelen-1)];
944
945 for( ; gp <= last; ++gp) {
946 if(gp->mode & ATTR_WDUMMY)
947 continue;
948
949 size = utf8len(gp->c);
950 memcpy(ptr, gp->c, size);
951 ptr += size;
952 }
953
954 /*
955 * Copy and pasting of line endings is inconsistent
956 * in the inconsistent terminal and GUI world.
957 * The best solution seems like to produce '\n' when
958 * something is copied from st and convert '\n' to
959 * '\r', when something to be pasted is received by
960 * st.
961 * FIXME: Fix the computer world.
962 */
963 if(sel.ne.y > y || lastx >= linelen)
964 *ptr++ = '\n';
965 }
966 *ptr = 0;
967 return str;
968 }
969
970 void
971 selcopy(void) {
972 xsetsel(getsel());
973 }
974
975 void
976 selnotify(XEvent *e) {
977 ulong nitems, ofs, rem;
978 int format;
979 uchar *data, *last, *repl;
980 Atom type;
981
982 ofs = 0;
983 do {
984 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
985 False, AnyPropertyType, &type, &format,
986 &nitems, &rem, &data)) {
987 fprintf(stderr, "Clipboard allocation failed\n");
988 return;
989 }
990
991 /*
992 * As seen in getsel:
993 * Line endings are inconsistent in the terminal and GUI world
994 * copy and pasting. When receiving some selection data,
995 * replace all '\n' with '\r'.
996 * FIXME: Fix the computer world.
997 */
998 repl = data;
999 last = data + nitems * format / 8;
1000 while((repl = memchr(repl, '\n', last - repl))) {
1001 *repl++ = '\r';
1002 }
1003
1004 if(IS_SET(MODE_BRCKTPASTE))
1005 ttywrite("\033[200~", 6);
1006 ttysend((char *)data, nitems * format / 8);
1007 if(IS_SET(MODE_BRCKTPASTE))
1008 ttywrite("\033[201~", 6);
1009 XFree(data);
1010 /* number of 32-bit chunks returned */
1011 ofs += nitems * format / 32;
1012 } while(rem > 0);
1013 }
1014
1015 void
1016 selpaste(const Arg *dummy) {
1017 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1018 xw.win, CurrentTime);
1019 }
1020
1021 void
1022 clippaste(const Arg *dummy) {
1023 Atom clipboard;
1024
1025 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1026 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1027 xw.win, CurrentTime);
1028 }
1029
1030 void
1031 selclear(XEvent *e) {
1032 if(sel.ob.x == -1)
1033 return;
1034 sel.ob.x = -1;
1035 tsetdirt(sel.nb.y, sel.ne.y);
1036 }
1037
1038 void
1039 selrequest(XEvent *e) {
1040 XSelectionRequestEvent *xsre;
1041 XSelectionEvent xev;
1042 Atom xa_targets, string;
1043
1044 xsre = (XSelectionRequestEvent *) e;
1045 xev.type = SelectionNotify;
1046 xev.requestor = xsre->requestor;
1047 xev.selection = xsre->selection;
1048 xev.target = xsre->target;
1049 xev.time = xsre->time;
1050 /* reject */
1051 xev.property = None;
1052
1053 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1054 if(xsre->target == xa_targets) {
1055 /* respond with the supported type */
1056 string = sel.xtarget;
1057 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1058 XA_ATOM, 32, PropModeReplace,
1059 (uchar *) &string, 1);
1060 xev.property = xsre->property;
1061 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1062 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1063 xsre->target, 8, PropModeReplace,
1064 (uchar *) sel.clip, strlen(sel.clip));
1065 xev.property = xsre->property;
1066 }
1067
1068 /* all done, send a notification to the listener */
1069 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1070 fprintf(stderr, "Error sending SelectionNotify event\n");
1071 }
1072
1073 void
1074 xsetsel(char *str) {
1075 /* register the selection for both the clipboard and the primary */
1076 Atom clipboard;
1077
1078 free(sel.clip);
1079 sel.clip = str;
1080
1081 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1082
1083 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1084 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1085 }
1086
1087 void
1088 brelease(XEvent *e) {
1089 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1090 mousereport(e);
1091 return;
1092 }
1093
1094 if(e->xbutton.button == Button2) {
1095 selpaste(NULL);
1096 } else if(e->xbutton.button == Button1) {
1097 if(sel.mode < 2) {
1098 selclear(NULL);
1099 } else {
1100 getbuttoninfo(e);
1101 selcopy();
1102 }
1103 sel.mode = 0;
1104 tsetdirt(sel.nb.y, sel.ne.y);
1105 }
1106 }
1107
1108 void
1109 bmotion(XEvent *e) {
1110 int oldey, oldex, oldsby, oldsey;
1111
1112 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1113 mousereport(e);
1114 return;
1115 }
1116
1117 if(!sel.mode)
1118 return;
1119
1120 sel.mode++;
1121 oldey = sel.oe.y;
1122 oldex = sel.oe.x;
1123 oldsby = sel.nb.y;
1124 oldsey = sel.ne.y;
1125 getbuttoninfo(e);
1126
1127 if(oldey != sel.oe.y || oldex != sel.oe.x)
1128 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1129 }
1130
1131 void
1132 die(const char *errstr, ...) {
1133 va_list ap;
1134
1135 va_start(ap, errstr);
1136 vfprintf(stderr, errstr, ap);
1137 va_end(ap);
1138 exit(EXIT_FAILURE);
1139 }
1140
1141 void
1142 execsh(void) {
1143 char **args, *sh;
1144 const struct passwd *pw;
1145 char buf[sizeof(long) * 8 + 1];
1146
1147 errno = 0;
1148 if((pw = getpwuid(getuid())) == NULL) {
1149 if(errno)
1150 die("getpwuid:%s\n", strerror(errno));
1151 else
1152 die("who are you?\n");
1153 }
1154 unsetenv("COLUMNS");
1155 unsetenv("LINES");
1156 unsetenv("TERMCAP");
1157
1158 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1159 snprintf(buf, sizeof(buf), "%lu", xw.win);
1160
1161 setenv("LOGNAME", pw->pw_name, 1);
1162 setenv("USER", pw->pw_name, 1);
1163 setenv("SHELL", sh, 1);
1164 setenv("HOME", pw->pw_dir, 1);
1165 setenv("TERM", termname, 1);
1166 setenv("WINDOWID", buf, 1);
1167
1168 signal(SIGCHLD, SIG_DFL);
1169 signal(SIGHUP, SIG_DFL);
1170 signal(SIGINT, SIG_DFL);
1171 signal(SIGQUIT, SIG_DFL);
1172 signal(SIGTERM, SIG_DFL);
1173 signal(SIGALRM, SIG_DFL);
1174
1175 args = opt_cmd ? opt_cmd : (char *[]){sh, "-i", NULL};
1176 execvp(args[0], args);
1177 exit(EXIT_FAILURE);
1178 }
1179
1180 void
1181 sigchld(int a) {
1182 int stat, ret;
1183
1184 if(waitpid(pid, &stat, 0) < 0)
1185 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1186
1187 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1188 if (ret != EXIT_SUCCESS)
1189 die("child finished with error '%d'\n", stat);
1190 exit(EXIT_SUCCESS);
1191 }
1192
1193 void
1194 ttynew(void) {
1195 int m, s;
1196 struct winsize w = {term.row, term.col, 0, 0};
1197
1198 /* seems to work fine on linux, openbsd and freebsd */
1199 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1200 die("openpty failed: %s\n", strerror(errno));
1201
1202 switch(pid = fork()) {
1203 case -1:
1204 die("fork failed\n");
1205 break;
1206 case 0:
1207 setsid(); /* create a new process group */
1208 dup2(s, STDIN_FILENO);
1209 dup2(s, STDOUT_FILENO);
1210 dup2(s, STDERR_FILENO);
1211 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1212 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1213 close(s);
1214 close(m);
1215 execsh();
1216 break;
1217 default:
1218 close(s);
1219 cmdfd = m;
1220 signal(SIGCHLD, sigchld);
1221 if(opt_io) {
1222 term.mode |= MODE_PRINT;
1223 iofd = (!strcmp(opt_io, "-")) ?
1224 STDOUT_FILENO :
1225 open(opt_io, O_WRONLY | O_CREAT, 0666);
1226 if(iofd < 0) {
1227 fprintf(stderr, "Error opening %s:%s\n",
1228 opt_io, strerror(errno));
1229 }
1230 }
1231 break;
1232 }
1233 }
1234
1235 void
1236 ttyread(void) {
1237 static char buf[BUFSIZ];
1238 static int buflen = 0;
1239 char *ptr;
1240 char s[UTF_SIZ];
1241 int charsize; /* size of utf8 char in bytes */
1242 long unicodep;
1243 int ret;
1244
1245 /* append read bytes to unprocessed bytes */
1246 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1247 die("Couldn't read from shell: %s\n", strerror(errno));
1248
1249 /* process every complete utf8 char */
1250 buflen += ret;
1251 ptr = buf;
1252 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1253 utf8encode(unicodep, s, UTF_SIZ);
1254 tputc(s, charsize);
1255 ptr += charsize;
1256 buflen -= charsize;
1257 }
1258
1259 /* keep any uncomplete utf8 char for the next call */
1260 memmove(buf, ptr, buflen);
1261 }
1262
1263 void
1264 ttywrite(const char *s, size_t n) {
1265 if(xwrite(cmdfd, s, n) == -1)
1266 die("write error on tty: %s\n", strerror(errno));
1267 }
1268
1269 void
1270 ttysend(char *s, size_t n) {
1271 ttywrite(s, n);
1272 if(IS_SET(MODE_ECHO))
1273 techo(s, n);
1274 }
1275
1276 void
1277 ttyresize(void) {
1278 struct winsize w;
1279
1280 w.ws_row = term.row;
1281 w.ws_col = term.col;
1282 w.ws_xpixel = xw.tw;
1283 w.ws_ypixel = xw.th;
1284 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1285 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1286 }
1287
1288 int
1289 tattrset(int attr) {
1290 int i, j;
1291
1292 for(i = 0; i < term.row-1; i++) {
1293 for(j = 0; j < term.col-1; j++) {
1294 if(term.line[i][j].mode & attr)
1295 return 1;
1296 }
1297 }
1298
1299 return 0;
1300 }
1301
1302 void
1303 tsetdirt(int top, int bot) {
1304 int i;
1305
1306 LIMIT(top, 0, term.row-1);
1307 LIMIT(bot, 0, term.row-1);
1308
1309 for(i = top; i <= bot; i++)
1310 term.dirty[i] = 1;
1311 }
1312
1313 void
1314 tsetdirtattr(int attr) {
1315 int i, j;
1316
1317 for(i = 0; i < term.row-1; i++) {
1318 for(j = 0; j < term.col-1; j++) {
1319 if(term.line[i][j].mode & attr) {
1320 tsetdirt(i, i);
1321 break;
1322 }
1323 }
1324 }
1325 }
1326
1327 void
1328 tfulldirt(void) {
1329 tsetdirt(0, term.row-1);
1330 }
1331
1332 void
1333 tcursor(int mode) {
1334 static TCursor c[2];
1335 bool alt = IS_SET(MODE_ALTSCREEN);
1336
1337 if(mode == CURSOR_SAVE) {
1338 c[alt] = term.c;
1339 } else if(mode == CURSOR_LOAD) {
1340 term.c = c[alt];
1341 tmoveto(c[alt].x, c[alt].y);
1342 }
1343 }
1344
1345 void
1346 treset(void) {
1347 uint i;
1348
1349 term.c = (TCursor){{
1350 .mode = ATTR_NULL,
1351 .fg = defaultfg,
1352 .bg = defaultbg
1353 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1354
1355 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1356 for(i = tabspaces; i < term.col; i += tabspaces)
1357 term.tabs[i] = 1;
1358 term.top = 0;
1359 term.bot = term.row - 1;
1360 term.mode = MODE_WRAP;
1361 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1362 term.charset = 0;
1363
1364 for(i = 0; i < 2; i++) {
1365 tmoveto(0, 0);
1366 tcursor(CURSOR_SAVE);
1367 tclearregion(0, 0, term.col-1, term.row-1);
1368 tswapscreen();
1369 }
1370 }
1371
1372 void
1373 tnew(int col, int row) {
1374 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1375 tresize(col, row);
1376 term.numlock = 1;
1377
1378 treset();
1379 }
1380
1381 void
1382 tswapscreen(void) {
1383 Line *tmp = term.line;
1384
1385 term.line = term.alt;
1386 term.alt = tmp;
1387 term.mode ^= MODE_ALTSCREEN;
1388 tfulldirt();
1389 }
1390
1391 void
1392 tscrolldown(int orig, int n) {
1393 int i;
1394 Line temp;
1395
1396 LIMIT(n, 0, term.bot-orig+1);
1397
1398 tsetdirt(orig, term.bot-n);
1399 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1400
1401 for(i = term.bot; i >= orig+n; i--) {
1402 temp = term.line[i];
1403 term.line[i] = term.line[i-n];
1404 term.line[i-n] = temp;
1405 }
1406
1407 selscroll(orig, n);
1408 }
1409
1410 void
1411 tscrollup(int orig, int n) {
1412 int i;
1413 Line temp;
1414
1415 LIMIT(n, 0, term.bot-orig+1);
1416
1417 tclearregion(0, orig, term.col-1, orig+n-1);
1418 tsetdirt(orig+n, term.bot);
1419
1420 for(i = orig; i <= term.bot-n; i++) {
1421 temp = term.line[i];
1422 term.line[i] = term.line[i+n];
1423 term.line[i+n] = temp;
1424 }
1425
1426 selscroll(orig, -n);
1427 }
1428
1429 void
1430 selscroll(int orig, int n) {
1431 if(sel.ob.x == -1)
1432 return;
1433
1434 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1435 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1436 selclear(NULL);
1437 return;
1438 }
1439 if(sel.type == SEL_RECTANGULAR) {
1440 if(sel.ob.y < term.top)
1441 sel.ob.y = term.top;
1442 if(sel.oe.y > term.bot)
1443 sel.oe.y = term.bot;
1444 } else {
1445 if(sel.ob.y < term.top) {
1446 sel.ob.y = term.top;
1447 sel.ob.x = 0;
1448 }
1449 if(sel.oe.y > term.bot) {
1450 sel.oe.y = term.bot;
1451 sel.oe.x = term.col;
1452 }
1453 }
1454 selnormalize();
1455 }
1456 }
1457
1458 void
1459 tnewline(int first_col) {
1460 int y = term.c.y;
1461
1462 if(y == term.bot) {
1463 tscrollup(term.top, 1);
1464 } else {
1465 y++;
1466 }
1467 tmoveto(first_col ? 0 : term.c.x, y);
1468 }
1469
1470 void
1471 csiparse(void) {
1472 char *p = csiescseq.buf, *np;
1473 long int v;
1474
1475 csiescseq.narg = 0;
1476 if(*p == '?') {
1477 csiescseq.priv = 1;
1478 p++;
1479 }
1480
1481 csiescseq.buf[csiescseq.len] = '\0';
1482 while(p < csiescseq.buf+csiescseq.len) {
1483 np = NULL;
1484 v = strtol(p, &np, 10);
1485 if(np == p)
1486 v = 0;
1487 if(v == LONG_MAX || v == LONG_MIN)
1488 v = -1;
1489 csiescseq.arg[csiescseq.narg++] = v;
1490 p = np;
1491 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1492 break;
1493 p++;
1494 }
1495 csiescseq.mode = *p;
1496 }
1497
1498 /* for absolute user moves, when decom is set */
1499 void
1500 tmoveato(int x, int y) {
1501 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1502 }
1503
1504 void
1505 tmoveto(int x, int y) {
1506 int miny, maxy;
1507
1508 if(term.c.state & CURSOR_ORIGIN) {
1509 miny = term.top;
1510 maxy = term.bot;
1511 } else {
1512 miny = 0;
1513 maxy = term.row - 1;
1514 }
1515 LIMIT(x, 0, term.col-1);
1516 LIMIT(y, miny, maxy);
1517 term.c.state &= ~CURSOR_WRAPNEXT;
1518 term.c.x = x;
1519 term.c.y = y;
1520 }
1521
1522 void
1523 tsetchar(char *c, Glyph *attr, int x, int y) {
1524 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1525 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1526 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1527 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1528 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1529 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1530 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1531 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1532 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1533 };
1534
1535 /*
1536 * The table is proudly stolen from rxvt.
1537 */
1538 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1539 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1540 c = vt100_0[c[0] - 0x41];
1541 }
1542 }
1543
1544 if(term.line[y][x].mode & ATTR_WIDE) {
1545 if(x+1 < term.col) {
1546 term.line[y][x+1].c[0] = ' ';
1547 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1548 }
1549 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1550 term.line[y][x-1].c[0] = ' ';
1551 term.line[y][x-1].mode &= ~ATTR_WIDE;
1552 }
1553
1554 term.dirty[y] = 1;
1555 term.line[y][x] = *attr;
1556 memcpy(term.line[y][x].c, c, UTF_SIZ);
1557 }
1558
1559 void
1560 tclearregion(int x1, int y1, int x2, int y2) {
1561 int x, y, temp;
1562 Glyph *gp;
1563
1564 if(x1 > x2)
1565 temp = x1, x1 = x2, x2 = temp;
1566 if(y1 > y2)
1567 temp = y1, y1 = y2, y2 = temp;
1568
1569 LIMIT(x1, 0, term.col-1);
1570 LIMIT(x2, 0, term.col-1);
1571 LIMIT(y1, 0, term.row-1);
1572 LIMIT(y2, 0, term.row-1);
1573
1574 for(y = y1; y <= y2; y++) {
1575 term.dirty[y] = 1;
1576 for(x = x1; x <= x2; x++) {
1577 gp = &term.line[y][x];
1578 if(selected(x, y))
1579 selclear(NULL);
1580 gp->fg = term.c.attr.fg;
1581 gp->bg = term.c.attr.bg;
1582 gp->mode = 0;
1583 memcpy(gp->c, " ", 2);
1584 }
1585 }
1586 }
1587
1588 void
1589 tdeletechar(int n) {
1590 int dst, src, size;
1591 Glyph *line;
1592
1593 LIMIT(n, 0, term.col - term.c.x);
1594
1595 dst = term.c.x;
1596 src = term.c.x + n;
1597 size = term.col - src;
1598 line = term.line[term.c.y];
1599
1600 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1601 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1602 }
1603
1604 void
1605 tinsertblank(int n) {
1606 int dst, src, size;
1607 Glyph *line;
1608
1609 LIMIT(n, 0, term.col - term.c.x);
1610
1611 dst = term.c.x + n;
1612 src = term.c.x;
1613 size = term.col - dst;
1614 line = term.line[term.c.y];
1615
1616 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1617 tclearregion(src, term.c.y, dst - 1, term.c.y);
1618 }
1619
1620 void
1621 tinsertblankline(int n) {
1622 if(BETWEEN(term.c.y, term.top, term.bot))
1623 tscrolldown(term.c.y, n);
1624 }
1625
1626 void
1627 tdeleteline(int n) {
1628 if(BETWEEN(term.c.y, term.top, term.bot))
1629 tscrollup(term.c.y, n);
1630 }
1631
1632 int32_t
1633 tdefcolor(int *attr, int *npar, int l) {
1634 int32_t idx = -1;
1635 uint r, g, b;
1636
1637 switch (attr[*npar + 1]) {
1638 case 2: /* direct color in RGB space */
1639 if (*npar + 4 >= l) {
1640 fprintf(stderr,
1641 "erresc(38): Incorrect number of parameters (%d)\n",
1642 *npar);
1643 break;
1644 }
1645 r = attr[*npar + 2];
1646 g = attr[*npar + 3];
1647 b = attr[*npar + 4];
1648 *npar += 4;
1649 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1650 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1651 r, g, b);
1652 else
1653 idx = TRUECOLOR(r, g, b);
1654 break;
1655 case 5: /* indexed color */
1656 if (*npar + 2 >= l) {
1657 fprintf(stderr,
1658 "erresc(38): Incorrect number of parameters (%d)\n",
1659 *npar);
1660 break;
1661 }
1662 *npar += 2;
1663 if(!BETWEEN(attr[*npar], 0, 255))
1664 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1665 else
1666 idx = attr[*npar];
1667 break;
1668 case 0: /* implemented defined (only foreground) */
1669 case 1: /* transparent */
1670 case 3: /* direct color in CMY space */
1671 case 4: /* direct color in CMYK space */
1672 default:
1673 fprintf(stderr,
1674 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1675 break;
1676 }
1677
1678 return idx;
1679 }
1680
1681 void
1682 tsetattr(int *attr, int l) {
1683 int i;
1684 int32_t idx;
1685
1686 for(i = 0; i < l; i++) {
1687 switch(attr[i]) {
1688 case 0:
1689 term.c.attr.mode &= ~(
1690 ATTR_BOLD |
1691 ATTR_FAINT |
1692 ATTR_ITALIC |
1693 ATTR_UNDERLINE |
1694 ATTR_BLINK |
1695 ATTR_REVERSE |
1696 ATTR_INVISIBLE |
1697 ATTR_STRUCK );
1698 term.c.attr.fg = defaultfg;
1699 term.c.attr.bg = defaultbg;
1700 break;
1701 case 1:
1702 term.c.attr.mode |= ATTR_BOLD;
1703 break;
1704 case 2:
1705 term.c.attr.mode |= ATTR_FAINT;
1706 break;
1707 case 3:
1708 term.c.attr.mode |= ATTR_ITALIC;
1709 break;
1710 case 4:
1711 term.c.attr.mode |= ATTR_UNDERLINE;
1712 break;
1713 case 5: /* slow blink */
1714 /* FALLTHROUGH */
1715 case 6: /* rapid blink */
1716 term.c.attr.mode |= ATTR_BLINK;
1717 break;
1718 case 7:
1719 term.c.attr.mode |= ATTR_REVERSE;
1720 break;
1721 case 8:
1722 term.c.attr.mode |= ATTR_INVISIBLE;
1723 break;
1724 case 9:
1725 term.c.attr.mode |= ATTR_STRUCK;
1726 break;
1727 case 22:
1728 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1729 break;
1730 case 23:
1731 term.c.attr.mode &= ~ATTR_ITALIC;
1732 break;
1733 case 24:
1734 term.c.attr.mode &= ~ATTR_UNDERLINE;
1735 break;
1736 case 25:
1737 term.c.attr.mode &= ~ATTR_BLINK;
1738 break;
1739 case 27:
1740 term.c.attr.mode &= ~ATTR_REVERSE;
1741 break;
1742 case 28:
1743 term.c.attr.mode &= ~ATTR_INVISIBLE;
1744 break;
1745 case 29:
1746 term.c.attr.mode &= ~ATTR_STRUCK;
1747 break;
1748 case 38:
1749 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1750 term.c.attr.fg = idx;
1751 break;
1752 case 39:
1753 term.c.attr.fg = defaultfg;
1754 break;
1755 case 48:
1756 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1757 term.c.attr.bg = idx;
1758 break;
1759 case 49:
1760 term.c.attr.bg = defaultbg;
1761 break;
1762 default:
1763 if(BETWEEN(attr[i], 30, 37)) {
1764 term.c.attr.fg = attr[i] - 30;
1765 } else if(BETWEEN(attr[i], 40, 47)) {
1766 term.c.attr.bg = attr[i] - 40;
1767 } else if(BETWEEN(attr[i], 90, 97)) {
1768 term.c.attr.fg = attr[i] - 90 + 8;
1769 } else if(BETWEEN(attr[i], 100, 107)) {
1770 term.c.attr.bg = attr[i] - 100 + 8;
1771 } else {
1772 fprintf(stderr,
1773 "erresc(default): gfx attr %d unknown\n",
1774 attr[i]), csidump();
1775 }
1776 break;
1777 }
1778 }
1779 }
1780
1781 void
1782 tsetscroll(int t, int b) {
1783 int temp;
1784
1785 LIMIT(t, 0, term.row-1);
1786 LIMIT(b, 0, term.row-1);
1787 if(t > b) {
1788 temp = t;
1789 t = b;
1790 b = temp;
1791 }
1792 term.top = t;
1793 term.bot = b;
1794 }
1795
1796 void
1797 tsetmode(bool priv, bool set, int *args, int narg) {
1798 int *lim, mode;
1799 bool alt;
1800
1801 for(lim = args + narg; args < lim; ++args) {
1802 if(priv) {
1803 switch(*args) {
1804 case 1: /* DECCKM -- Cursor key */
1805 MODBIT(term.mode, set, MODE_APPCURSOR);
1806 break;
1807 case 5: /* DECSCNM -- Reverse video */
1808 mode = term.mode;
1809 MODBIT(term.mode, set, MODE_REVERSE);
1810 if(mode != term.mode)
1811 redraw(REDRAW_TIMEOUT);
1812 break;
1813 case 6: /* DECOM -- Origin */
1814 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1815 tmoveato(0, 0);
1816 break;
1817 case 7: /* DECAWM -- Auto wrap */
1818 MODBIT(term.mode, set, MODE_WRAP);
1819 break;
1820 case 0: /* Error (IGNORED) */
1821 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1822 case 3: /* DECCOLM -- Column (IGNORED) */
1823 case 4: /* DECSCLM -- Scroll (IGNORED) */
1824 case 8: /* DECARM -- Auto repeat (IGNORED) */
1825 case 18: /* DECPFF -- Printer feed (IGNORED) */
1826 case 19: /* DECPEX -- Printer extent (IGNORED) */
1827 case 42: /* DECNRCM -- National characters (IGNORED) */
1828 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1829 break;
1830 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1831 MODBIT(term.mode, !set, MODE_HIDE);
1832 break;
1833 case 9: /* X10 mouse compatibility mode */
1834 xsetpointermotion(0);
1835 MODBIT(term.mode, 0, MODE_MOUSE);
1836 MODBIT(term.mode, set, MODE_MOUSEX10);
1837 break;
1838 case 1000: /* 1000: report button press */
1839 xsetpointermotion(0);
1840 MODBIT(term.mode, 0, MODE_MOUSE);
1841 MODBIT(term.mode, set, MODE_MOUSEBTN);
1842 break;
1843 case 1002: /* 1002: report motion on button press */
1844 xsetpointermotion(0);
1845 MODBIT(term.mode, 0, MODE_MOUSE);
1846 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1847 break;
1848 case 1003: /* 1003: enable all mouse motions */
1849 xsetpointermotion(set);
1850 MODBIT(term.mode, 0, MODE_MOUSE);
1851 MODBIT(term.mode, set, MODE_MOUSEMANY);
1852 break;
1853 case 1004: /* 1004: send focus events to tty */
1854 MODBIT(term.mode, set, MODE_FOCUS);
1855 break;
1856 case 1006: /* 1006: extended reporting mode */
1857 MODBIT(term.mode, set, MODE_MOUSESGR);
1858 break;
1859 case 1034:
1860 MODBIT(term.mode, set, MODE_8BIT);
1861 break;
1862 case 1049: /* swap screen & set/restore cursor as xterm */
1863 if (!allowaltscreen)
1864 break;
1865 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1866 /* FALLTHROUGH */
1867 case 47: /* swap screen */
1868 case 1047:
1869 if (!allowaltscreen)
1870 break;
1871 alt = IS_SET(MODE_ALTSCREEN);
1872 if(alt) {
1873 tclearregion(0, 0, term.col-1,
1874 term.row-1);
1875 }
1876 if(set ^ alt) /* set is always 1 or 0 */
1877 tswapscreen();
1878 if(*args != 1049)
1879 break;
1880 /* FALLTHROUGH */
1881 case 1048:
1882 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1883 break;
1884 case 2004: /* 2004: bracketed paste mode */
1885 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1886 break;
1887 /* Not implemented mouse modes. See comments there. */
1888 case 1001: /* mouse highlight mode; can hang the
1889 terminal by design when implemented. */
1890 case 1005: /* UTF-8 mouse mode; will confuse
1891 applications not supporting UTF-8
1892 and luit. */
1893 case 1015: /* urxvt mangled mouse mode; incompatible
1894 and can be mistaken for other control
1895 codes. */
1896 default:
1897 fprintf(stderr,
1898 "erresc: unknown private set/reset mode %d\n",
1899 *args);
1900 break;
1901 }
1902 } else {
1903 switch(*args) {
1904 case 0: /* Error (IGNORED) */
1905 break;
1906 case 2: /* KAM -- keyboard action */
1907 MODBIT(term.mode, set, MODE_KBDLOCK);
1908 break;
1909 case 4: /* IRM -- Insertion-replacement */
1910 MODBIT(term.mode, set, MODE_INSERT);
1911 break;
1912 case 12: /* SRM -- Send/Receive */
1913 MODBIT(term.mode, !set, MODE_ECHO);
1914 break;
1915 case 20: /* LNM -- Linefeed/new line */
1916 MODBIT(term.mode, set, MODE_CRLF);
1917 break;
1918 default:
1919 fprintf(stderr,
1920 "erresc: unknown set/reset mode %d\n",
1921 *args);
1922 break;
1923 }
1924 }
1925 }
1926 }
1927
1928 void
1929 csihandle(void) {
1930 char buf[40];
1931 int len;
1932
1933 switch(csiescseq.mode) {
1934 default:
1935 unknown:
1936 fprintf(stderr, "erresc: unknown csi ");
1937 csidump();
1938 /* die(""); */
1939 break;
1940 case '@': /* ICH -- Insert <n> blank char */
1941 DEFAULT(csiescseq.arg[0], 1);
1942 tinsertblank(csiescseq.arg[0]);
1943 break;
1944 case 'A': /* CUU -- Cursor <n> Up */
1945 DEFAULT(csiescseq.arg[0], 1);
1946 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1947 break;
1948 case 'B': /* CUD -- Cursor <n> Down */
1949 case 'e': /* VPR --Cursor <n> Down */
1950 DEFAULT(csiescseq.arg[0], 1);
1951 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1952 break;
1953 case 'i': /* MC -- Media Copy */
1954 switch(csiescseq.arg[0]) {
1955 case 0:
1956 tdump();
1957 break;
1958 case 1:
1959 tdumpline(term.c.y);
1960 break;
1961 case 2:
1962 tdumpsel();
1963 break;
1964 case 4:
1965 term.mode &= ~MODE_PRINT;
1966 break;
1967 case 5:
1968 term.mode |= MODE_PRINT;
1969 break;
1970 }
1971 break;
1972 case 'c': /* DA -- Device Attributes */
1973 if(csiescseq.arg[0] == 0)
1974 ttywrite(vtiden, sizeof(vtiden) - 1);
1975 break;
1976 case 'C': /* CUF -- Cursor <n> Forward */
1977 case 'a': /* HPR -- Cursor <n> Forward */
1978 DEFAULT(csiescseq.arg[0], 1);
1979 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1980 break;
1981 case 'D': /* CUB -- Cursor <n> Backward */
1982 DEFAULT(csiescseq.arg[0], 1);
1983 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1984 break;
1985 case 'E': /* CNL -- Cursor <n> Down and first col */
1986 DEFAULT(csiescseq.arg[0], 1);
1987 tmoveto(0, term.c.y+csiescseq.arg[0]);
1988 break;
1989 case 'F': /* CPL -- Cursor <n> Up and first col */
1990 DEFAULT(csiescseq.arg[0], 1);
1991 tmoveto(0, term.c.y-csiescseq.arg[0]);
1992 break;
1993 case 'g': /* TBC -- Tabulation clear */
1994 switch(csiescseq.arg[0]) {
1995 case 0: /* clear current tab stop */
1996 term.tabs[term.c.x] = 0;
1997 break;
1998 case 3: /* clear all the tabs */
1999 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2000 break;
2001 default:
2002 goto unknown;
2003 }
2004 break;
2005 case 'G': /* CHA -- Move to <col> */
2006 case '`': /* HPA */
2007 DEFAULT(csiescseq.arg[0], 1);
2008 tmoveto(csiescseq.arg[0]-1, term.c.y);
2009 break;
2010 case 'H': /* CUP -- Move to <row> <col> */
2011 case 'f': /* HVP */
2012 DEFAULT(csiescseq.arg[0], 1);
2013 DEFAULT(csiescseq.arg[1], 1);
2014 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2015 break;
2016 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2017 DEFAULT(csiescseq.arg[0], 1);
2018 tputtab(csiescseq.arg[0]);
2019 break;
2020 case 'J': /* ED -- Clear screen */
2021 selclear(NULL);
2022 switch(csiescseq.arg[0]) {
2023 case 0: /* below */
2024 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2025 if(term.c.y < term.row-1) {
2026 tclearregion(0, term.c.y+1, term.col-1,
2027 term.row-1);
2028 }
2029 break;
2030 case 1: /* above */
2031 if(term.c.y > 1)
2032 tclearregion(0, 0, term.col-1, term.c.y-1);
2033 tclearregion(0, term.c.y, term.c.x, term.c.y);
2034 break;
2035 case 2: /* all */
2036 tclearregion(0, 0, term.col-1, term.row-1);
2037 break;
2038 default:
2039 goto unknown;
2040 }
2041 break;
2042 case 'K': /* EL -- Clear line */
2043 switch(csiescseq.arg[0]) {
2044 case 0: /* right */
2045 tclearregion(term.c.x, term.c.y, term.col-1,
2046 term.c.y);
2047 break;
2048 case 1: /* left */
2049 tclearregion(0, term.c.y, term.c.x, term.c.y);
2050 break;
2051 case 2: /* all */
2052 tclearregion(0, term.c.y, term.col-1, term.c.y);
2053 break;
2054 }
2055 break;
2056 case 'S': /* SU -- Scroll <n> line up */
2057 DEFAULT(csiescseq.arg[0], 1);
2058 tscrollup(term.top, csiescseq.arg[0]);
2059 break;
2060 case 'T': /* SD -- Scroll <n> line down */
2061 DEFAULT(csiescseq.arg[0], 1);
2062 tscrolldown(term.top, csiescseq.arg[0]);
2063 break;
2064 case 'L': /* IL -- Insert <n> blank lines */
2065 DEFAULT(csiescseq.arg[0], 1);
2066 tinsertblankline(csiescseq.arg[0]);
2067 break;
2068 case 'l': /* RM -- Reset Mode */
2069 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2070 break;
2071 case 'M': /* DL -- Delete <n> lines */
2072 DEFAULT(csiescseq.arg[0], 1);
2073 tdeleteline(csiescseq.arg[0]);
2074 break;
2075 case 'X': /* ECH -- Erase <n> char */
2076 DEFAULT(csiescseq.arg[0], 1);
2077 tclearregion(term.c.x, term.c.y,
2078 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2079 break;
2080 case 'P': /* DCH -- Delete <n> char */
2081 DEFAULT(csiescseq.arg[0], 1);
2082 tdeletechar(csiescseq.arg[0]);
2083 break;
2084 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2085 DEFAULT(csiescseq.arg[0], 1);
2086 tputtab(-csiescseq.arg[0]);
2087 break;
2088 case 'd': /* VPA -- Move to <row> */
2089 DEFAULT(csiescseq.arg[0], 1);
2090 tmoveato(term.c.x, csiescseq.arg[0]-1);
2091 break;
2092 case 'h': /* SM -- Set terminal mode */
2093 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2094 break;
2095 case 'm': /* SGR -- Terminal attribute (color) */
2096 tsetattr(csiescseq.arg, csiescseq.narg);
2097 break;
2098 case 'n': /* DSR – Device Status Report (cursor position) */
2099 if (csiescseq.arg[0] == 6) {
2100 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2101 term.c.y+1, term.c.x+1);
2102 ttywrite(buf, len);
2103 }
2104 break;
2105 case 'r': /* DECSTBM -- Set Scrolling Region */
2106 if(csiescseq.priv) {
2107 goto unknown;
2108 } else {
2109 DEFAULT(csiescseq.arg[0], 1);
2110 DEFAULT(csiescseq.arg[1], term.row);
2111 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2112 tmoveato(0, 0);
2113 }
2114 break;
2115 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2116 tcursor(CURSOR_SAVE);
2117 break;
2118 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2119 tcursor(CURSOR_LOAD);
2120 break;
2121 }
2122 }
2123
2124 void
2125 csidump(void) {
2126 int i;
2127 uint c;
2128
2129 printf("ESC[");
2130 for(i = 0; i < csiescseq.len; i++) {
2131 c = csiescseq.buf[i] & 0xff;
2132 if(isprint(c)) {
2133 putchar(c);
2134 } else if(c == '\n') {
2135 printf("(\\n)");
2136 } else if(c == '\r') {
2137 printf("(\\r)");
2138 } else if(c == 0x1b) {
2139 printf("(\\e)");
2140 } else {
2141 printf("(%02x)", c);
2142 }
2143 }
2144 putchar('\n');
2145 }
2146
2147 void
2148 csireset(void) {
2149 memset(&csiescseq, 0, sizeof(csiescseq));
2150 }
2151
2152 void
2153 strhandle(void) {
2154 char *p = NULL;
2155 int j, narg, par;
2156
2157 term.esc &= ~(ESC_STR_END|ESC_STR);
2158 strparse();
2159 narg = strescseq.narg;
2160 par = atoi(strescseq.args[0]);
2161
2162 switch(strescseq.type) {
2163 case ']': /* OSC -- Operating System Command */
2164 switch(par) {
2165 case 0:
2166 case 1:
2167 case 2:
2168 if(narg > 1)
2169 xsettitle(strescseq.args[1]);
2170 return;
2171 case 4: /* color set */
2172 if(narg < 3)
2173 break;
2174 p = strescseq.args[2];
2175 /* FALLTHROUGH */
2176 case 104: /* color reset, here p = NULL */
2177 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2178 if(xsetcolorname(j, p)) {
2179 fprintf(stderr, "erresc: invalid color %s\n", p);
2180 } else {
2181 /*
2182 * TODO if defaultbg color is changed, borders
2183 * are dirty
2184 */
2185 redraw(0);
2186 }
2187 return;
2188 }
2189 break;
2190 case 'k': /* old title set compatibility */
2191 xsettitle(strescseq.args[0]);
2192 return;
2193 case 'P': /* DCS -- Device Control String */
2194 case '_': /* APC -- Application Program Command */
2195 case '^': /* PM -- Privacy Message */
2196 return;
2197 }
2198
2199 fprintf(stderr, "erresc: unknown str ");
2200 strdump();
2201 }
2202
2203 void
2204 strparse(void) {
2205 char *p = strescseq.buf;
2206
2207 strescseq.narg = 0;
2208 strescseq.buf[strescseq.len] = '\0';
2209 while(p && strescseq.narg < STR_ARG_SIZ)
2210 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2211 }
2212
2213 void
2214 strdump(void) {
2215 int i;
2216 uint c;
2217
2218 printf("ESC%c", strescseq.type);
2219 for(i = 0; i < strescseq.len; i++) {
2220 c = strescseq.buf[i] & 0xff;
2221 if(c == '\0') {
2222 return;
2223 } else if(isprint(c)) {
2224 putchar(c);
2225 } else if(c == '\n') {
2226 printf("(\\n)");
2227 } else if(c == '\r') {
2228 printf("(\\r)");
2229 } else if(c == 0x1b) {
2230 printf("(\\e)");
2231 } else {
2232 printf("(%02x)", c);
2233 }
2234 }
2235 printf("ESC\\\n");
2236 }
2237
2238 void
2239 strreset(void) {
2240 memset(&strescseq, 0, sizeof(strescseq));
2241 }
2242
2243 void
2244 tprinter(char *s, size_t len) {
2245 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2246 fprintf(stderr, "Error writing in %s:%s\n",
2247 opt_io, strerror(errno));
2248 close(iofd);
2249 iofd = -1;
2250 }
2251 }
2252
2253 void
2254 toggleprinter(const Arg *arg) {
2255 term.mode ^= MODE_PRINT;
2256 }
2257
2258 void
2259 printscreen(const Arg *arg) {
2260 tdump();
2261 }
2262
2263 void
2264 printsel(const Arg *arg) {
2265 tdumpsel();
2266 }
2267
2268 void
2269 tdumpsel(void) {
2270 char *ptr;
2271
2272 if((ptr = getsel())) {
2273 tprinter(ptr, strlen(ptr));
2274 free(ptr);
2275 }
2276 }
2277
2278 void
2279 tdumpline(int n) {
2280 Glyph *bp, *end;
2281
2282 bp = &term.line[n][0];
2283 end = &bp[MIN(tlinelen(n), term.col) - 1];
2284 if(bp != end || bp->c[0] != ' ') {
2285 for( ;bp <= end; ++bp)
2286 tprinter(bp->c, utf8len(bp->c));
2287 }
2288 tprinter("\n", 1);
2289 }
2290
2291 void
2292 tdump(void) {
2293 int i;
2294
2295 for(i = 0; i < term.row; ++i)
2296 tdumpline(i);
2297 }
2298
2299 void
2300 tputtab(int n) {
2301 uint x = term.c.x;
2302
2303 if(n > 0) {
2304 while(x < term.col && n--)
2305 for(++x; x < term.col && !term.tabs[x]; ++x)
2306 /* nothing */ ;
2307 } else if(n < 0) {
2308 while(x > 0 && n++)
2309 for(--x; x > 0 && !term.tabs[x]; --x)
2310 /* nothing */ ;
2311 }
2312 tmoveto(x, term.c.y);
2313 }
2314
2315 void
2316 techo(char *buf, int len) {
2317 for(; len > 0; buf++, len--) {
2318 char c = *buf;
2319
2320 if(ISCONTROL((uchar) c)) { /* control code */
2321 if(c & 0x80) {
2322 c &= 0x7f;
2323 tputc("^", 1);
2324 tputc("[", 1);
2325 } else if(c != '\n' && c != '\r' && c != '\t') {
2326 c ^= 0x40;
2327 tputc("^", 1);
2328 }
2329 tputc(&c, 1);
2330 } else {
2331 break;
2332 }
2333 }
2334 if(len)
2335 tputc(buf, len);
2336 }
2337
2338 void
2339 tdeftran(char ascii) {
2340 static char cs[] = "0B";
2341 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2342 char *p;
2343
2344 if((p = strchr(cs, ascii)) == NULL) {
2345 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2346 } else {
2347 term.trantbl[term.icharset] = vcs[p - cs];
2348 }
2349 }
2350
2351 void
2352 tdectest(char c) {
2353 static char E[UTF_SIZ] = "E";
2354 int x, y;
2355
2356 if(c == '8') { /* DEC screen alignment test. */
2357 for(x = 0; x < term.col; ++x) {
2358 for(y = 0; y < term.row; ++y)
2359 tsetchar(E, &term.c.attr, x, y);
2360 }
2361 }
2362 }
2363
2364 void
2365 tstrsequence(uchar c) {
2366 if (c & 0x80) {
2367 switch (c) {
2368 case 0x90: /* DCS -- Device Control String */
2369 c = 'P';
2370 break;
2371 case 0x9f: /* APC -- Application Program Command */
2372 c = '_';
2373 break;
2374 case 0x9e: /* PM -- Privacy Message */
2375 c = '^';
2376 break;
2377 case 0x9d: /* OSC -- Operating System Command */
2378 c = ']';
2379 break;
2380 }
2381 }
2382 strreset();
2383 strescseq.type = c;
2384 term.esc |= ESC_STR;
2385 return;
2386 }
2387
2388 void
2389 tcontrolcode(uchar ascii) {
2390 static char question[UTF_SIZ] = "?";
2391
2392 switch(ascii) {
2393 case '\t': /* HT */
2394 tputtab(1);
2395 return;
2396 case '\b': /* BS */
2397 tmoveto(term.c.x-1, term.c.y);
2398 return;
2399 case '\r': /* CR */
2400 tmoveto(0, term.c.y);
2401 return;
2402 case '\f': /* LF */
2403 case '\v': /* VT */
2404 case '\n': /* LF */
2405 /* go to first col if the mode is set */
2406 tnewline(IS_SET(MODE_CRLF));
2407 return;
2408 case '\a': /* BEL */
2409 if(term.esc & ESC_STR_END) {
2410 /* backwards compatibility to xterm */
2411 strhandle();
2412 } else {
2413 if(!(xw.state & WIN_FOCUSED))
2414 xseturgency(1);
2415 if (bellvolume)
2416 XBell(xw.dpy, bellvolume);
2417 }
2418 break;
2419 case '\033': /* ESC */
2420 csireset();
2421 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2422 term.esc |= ESC_START;
2423 return;
2424 case '\016': /* SO */
2425 term.charset = 0;
2426 return;
2427 case '\017': /* SI */
2428 term.charset = 1;
2429 return;
2430 case '\032': /* SUB */
2431 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2432 case '\030': /* CAN */
2433 csireset();
2434 break;
2435 case '\005': /* ENQ (IGNORED) */
2436 case '\000': /* NUL (IGNORED) */
2437 case '\021': /* XON (IGNORED) */
2438 case '\023': /* XOFF (IGNORED) */
2439 case 0177: /* DEL (IGNORED) */
2440 return;
2441 case 0x84: /* TODO: IND */
2442 break;
2443 case 0x85: /* NEL -- Next line */
2444 tnewline(1); /* always go to first col */
2445 break;
2446 case 0x88: /* HTS -- Horizontal tab stop */
2447 term.tabs[term.c.x] = 1;
2448 break;
2449 case 0x8d: /* TODO: RI */
2450 case 0x8e: /* TODO: SS2 */
2451 case 0x8f: /* TODO: SS3 */
2452 case 0x98: /* TODO: SOS */
2453 break;
2454 case 0x9a: /* DECID -- Identify Terminal */
2455 ttywrite(vtiden, sizeof(vtiden) - 1);
2456 break;
2457 case 0x9b: /* TODO: CSI */
2458 case 0x9c: /* TODO: ST */
2459 break;
2460 case 0x90: /* DCS -- Device Control String */
2461 case 0x9f: /* APC -- Application Program Command */
2462 case 0x9e: /* PM -- Privacy Message */
2463 case 0x9d: /* OSC -- Operating System Command */
2464 tstrsequence(ascii);
2465 return;
2466 }
2467 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2468 term.esc &= ~(ESC_STR_END|ESC_STR);
2469 return;
2470 }
2471
2472 /*
2473 * returns 1 when the sequence is finished and it hasn't to read
2474 * more characters for this sequence, otherwise 0
2475 */
2476 int
2477 eschandle(uchar ascii) {
2478 switch(ascii) {
2479 case '[':
2480 term.esc |= ESC_CSI;
2481 return 0;
2482 case '#':
2483 term.esc |= ESC_TEST;
2484 return 0;
2485 case 'P': /* DCS -- Device Control String */
2486 case '_': /* APC -- Application Program Command */
2487 case '^': /* PM -- Privacy Message */
2488 case ']': /* OSC -- Operating System Command */
2489 case 'k': /* old title set compatibility */
2490 tstrsequence(ascii);
2491 return 0;
2492 case '(': /* set primary charset G0 */
2493 case ')': /* set secondary charset G1 */
2494 case '*': /* set tertiary charset G2 */
2495 case '+': /* set quaternary charset G3 */
2496 term.icharset = ascii - '(';
2497 term.esc |= ESC_ALTCHARSET;
2498 return 0;
2499 case 'D': /* IND -- Linefeed */
2500 if(term.c.y == term.bot) {
2501 tscrollup(term.top, 1);
2502 } else {
2503 tmoveto(term.c.x, term.c.y+1);
2504 }
2505 break;
2506 case 'E': /* NEL -- Next line */
2507 tnewline(1); /* always go to first col */
2508 break;
2509 case 'H': /* HTS -- Horizontal tab stop */
2510 term.tabs[term.c.x] = 1;
2511 break;
2512 case 'M': /* RI -- Reverse index */
2513 if(term.c.y == term.top) {
2514 tscrolldown(term.top, 1);
2515 } else {
2516 tmoveto(term.c.x, term.c.y-1);
2517 }
2518 break;
2519 case 'Z': /* DECID -- Identify Terminal */
2520 ttywrite(vtiden, sizeof(vtiden) - 1);
2521 break;
2522 case 'c': /* RIS -- Reset to inital state */
2523 treset();
2524 xresettitle();
2525 xloadcols();
2526 break;
2527 case '=': /* DECPAM -- Application keypad */
2528 term.mode |= MODE_APPKEYPAD;
2529 break;
2530 case '>': /* DECPNM -- Normal keypad */
2531 term.mode &= ~MODE_APPKEYPAD;
2532 break;
2533 case '7': /* DECSC -- Save Cursor */
2534 tcursor(CURSOR_SAVE);
2535 break;
2536 case '8': /* DECRC -- Restore Cursor */
2537 tcursor(CURSOR_LOAD);
2538 break;
2539 case '\\': /* ST -- String Terminator */
2540 if(term.esc & ESC_STR_END)
2541 strhandle();
2542 break;
2543 default:
2544 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2545 (uchar) ascii, isprint(ascii)? ascii:'.');
2546 break;
2547 }
2548 return 1;
2549 }
2550
2551 void
2552 tputc(char *c, int len) {
2553 uchar ascii;
2554 bool control;
2555 long unicodep;
2556 int width;
2557 Glyph *gp;
2558
2559 if(len == 1) {
2560 width = 1;
2561 unicodep = ascii = *c;
2562 } else {
2563 utf8decode(c, &unicodep, UTF_SIZ);
2564 width = wcwidth(unicodep);
2565 control = ISCONTROLC1(unicodep);
2566 ascii = unicodep;
2567 }
2568
2569 if(IS_SET(MODE_PRINT))
2570 tprinter(c, len);
2571 control = ISCONTROL(unicodep);
2572
2573 /*
2574 * STR sequence must be checked before anything else
2575 * because it uses all following characters until it
2576 * receives a ESC, a SUB, a ST or any other C1 control
2577 * character.
2578 */
2579 if(term.esc & ESC_STR) {
2580 if(width == 1 &&
2581 (ascii == '\a' || ascii == 030 ||
2582 ascii == 032 || ascii == 033 ||
2583 ISCONTROLC1(unicodep))) {
2584 term.esc &= ~(ESC_START|ESC_STR);
2585 term.esc |= ESC_STR_END;
2586 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2587 memmove(&strescseq.buf[strescseq.len], c, len);
2588 strescseq.len += len;
2589 return;
2590 } else {
2591 /*
2592 * Here is a bug in terminals. If the user never sends
2593 * some code to stop the str or esc command, then st
2594 * will stop responding. But this is better than
2595 * silently failing with unknown characters. At least
2596 * then users will report back.
2597 *
2598 * In the case users ever get fixed, here is the code:
2599 */
2600 /*
2601 * term.esc = 0;
2602 * strhandle();
2603 */
2604 return;
2605 }
2606 }
2607
2608 /*
2609 * Actions of control codes must be performed as soon they arrive
2610 * because they can be embedded inside a control sequence, and
2611 * they must not cause conflicts with sequences.
2612 */
2613 if(control) {
2614 tcontrolcode(ascii);
2615 /*
2616 * control codes are not shown ever
2617 */
2618 return;
2619 } else if(term.esc & ESC_START) {
2620 if(term.esc & ESC_CSI) {
2621 csiescseq.buf[csiescseq.len++] = ascii;
2622 if(BETWEEN(ascii, 0x40, 0x7E)
2623 || csiescseq.len >= \
2624 sizeof(csiescseq.buf)-1) {
2625 term.esc = 0;
2626 csiparse();
2627 csihandle();
2628 }
2629 return;
2630 } else if(term.esc & ESC_ALTCHARSET) {
2631 tdeftran(ascii);
2632 } else if(term.esc & ESC_TEST) {
2633 tdectest(ascii);
2634 } else {
2635 if (!eschandle(ascii))
2636 return;
2637 /* sequence already finished */
2638 }
2639 term.esc = 0;
2640 /*
2641 * All characters which form part of a sequence are not
2642 * printed
2643 */
2644 return;
2645 }
2646 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2647 selclear(NULL);
2648
2649 gp = &term.line[term.c.y][term.c.x];
2650 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2651 gp->mode |= ATTR_WRAP;
2652 tnewline(1);
2653 }
2654
2655 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2656 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2657
2658 if(term.c.x+width > term.col)
2659 tnewline(1);
2660
2661 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2662
2663 if(width == 2) {
2664 gp->mode |= ATTR_WIDE;
2665 if(term.c.x+1 < term.col) {
2666 gp[1].c[0] = '\0';
2667 gp[1].mode = ATTR_WDUMMY;
2668 }
2669 }
2670 if(term.c.x+width < term.col) {
2671 tmoveto(term.c.x+width, term.c.y);
2672 } else {
2673 term.c.state |= CURSOR_WRAPNEXT;
2674 }
2675 }
2676
2677 void
2678 tresize(int col, int row) {
2679 int i;
2680 int minrow = MIN(row, term.row);
2681 int mincol = MIN(col, term.col);
2682 int slide = term.c.y - row + 1;
2683 bool *bp;
2684 TCursor c;
2685
2686 if(col < 1 || row < 1) {
2687 fprintf(stderr,
2688 "tresize: error resizing to %dx%d\n", col, row);
2689 return;
2690 }
2691
2692 /* free unneeded rows */
2693 i = 0;
2694 if(slide > 0) {
2695 /*
2696 * slide screen to keep cursor where we expect it -
2697 * tscrollup would work here, but we can optimize to
2698 * memmove because we're freeing the earlier lines
2699 */
2700 for(/* i = 0 */; i < slide; i++) {
2701 free(term.line[i]);
2702 free(term.alt[i]);
2703 }
2704 memmove(term.line, term.line + slide, row * sizeof(Line));
2705 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2706 }
2707 for(i += row; i < term.row; i++) {
2708 free(term.line[i]);
2709 free(term.alt[i]);
2710 }
2711
2712 /* resize to new height */
2713 term.line = xrealloc(term.line, row * sizeof(Line));
2714 term.alt = xrealloc(term.alt, row * sizeof(Line));
2715 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2716 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2717
2718 /* resize each row to new width, zero-pad if needed */
2719 for(i = 0; i < minrow; i++) {
2720 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2721 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2722 }
2723
2724 /* allocate any new rows */
2725 for(/* i == minrow */; i < row; i++) {
2726 term.line[i] = xmalloc(col * sizeof(Glyph));
2727 term.alt[i] = xmalloc(col * sizeof(Glyph));
2728 }
2729 if(col > term.col) {
2730 bp = term.tabs + term.col;
2731
2732 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2733 while(--bp > term.tabs && !*bp)
2734 /* nothing */ ;
2735 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2736 *bp = 1;
2737 }
2738 /* update terminal size */
2739 term.col = col;
2740 term.row = row;
2741 /* reset scrolling region */
2742 tsetscroll(0, row-1);
2743 /* make use of the LIMIT in tmoveto */
2744 tmoveto(term.c.x, term.c.y);
2745 /* Clearing both screens (it makes dirty all lines) */
2746 c = term.c;
2747 for(i = 0; i < 2; i++) {
2748 if(mincol < col && 0 < minrow) {
2749 tclearregion(mincol, 0, col - 1, minrow - 1);
2750 }
2751 if(0 < col && minrow < row) {
2752 tclearregion(0, minrow, col - 1, row - 1);
2753 }
2754 tswapscreen();
2755 tcursor(CURSOR_LOAD);
2756 }
2757 term.c = c;
2758 }
2759
2760 void
2761 xresize(int col, int row) {
2762 xw.tw = MAX(1, col * xw.cw);
2763 xw.th = MAX(1, row * xw.ch);
2764
2765 XFreePixmap(xw.dpy, xw.buf);
2766 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2767 DefaultDepth(xw.dpy, xw.scr));
2768 XftDrawChange(xw.draw, xw.buf);
2769 xclear(0, 0, xw.w, xw.h);
2770 }
2771
2772 static inline ushort
2773 sixd_to_16bit(int x) {
2774 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2775 }
2776
2777 void
2778 xloadcols(void) {
2779 int i;
2780 XRenderColor color = { .alpha = 0xffff };
2781 static bool loaded;
2782 Color *cp;
2783
2784 if(loaded) {
2785 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2786 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2787 }
2788
2789 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2790 for(i = 0; i < LEN(colorname); i++) {
2791 if(!colorname[i])
2792 continue;
2793 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2794 die("Could not allocate color '%s'\n", colorname[i]);
2795 }
2796 }
2797
2798 /* load colors [16-231] ; same colors as xterm */
2799 for(i = 16; i < 6*6*6+16; i++) {
2800 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2801 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2802 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2803 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2804 die("Could not allocate color %d\n", i);
2805 }
2806
2807 /* load colors [232-255] ; grayscale */
2808 for(; i < 256; i++) {
2809 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2810 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2811 die("Could not allocate color %d\n", i);
2812 }
2813 loaded = true;
2814 }
2815
2816 int
2817 xsetcolorname(int x, const char *name) {
2818 XRenderColor color = { .alpha = 0xffff };
2819 Color ncolor;
2820
2821 if(!BETWEEN(x, 0, LEN(colorname)))
2822 return 1;
2823
2824 if(!name) {
2825 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2826 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2827 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2828 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2829 if(!XftColorAllocValue(xw.dpy, xw.vis,
2830 xw.cmap, &color, &ncolor)) {
2831 return 1;
2832 }
2833
2834 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2835 dc.col[x] = ncolor;
2836 return 0;
2837 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2838 color.red = color.green = color.blue = \
2839 0x0808 + 0x0a0a * (x - (16 + 216));
2840 if(!XftColorAllocValue(xw.dpy, xw.vis,
2841 xw.cmap, &color, &ncolor)) {
2842 return 1;
2843 }
2844
2845 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2846 dc.col[x] = ncolor;
2847 return 0;
2848 } else { /* system colors */
2849 name = colorname[x];
2850 }
2851 }
2852 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2853 return 1;
2854
2855 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2856 dc.col[x] = ncolor;
2857 return 0;
2858 }
2859
2860 void
2861 xtermclear(int col1, int row1, int col2, int row2) {
2862 XftDrawRect(xw.draw,
2863 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2864 borderpx + col1 * xw.cw,
2865 borderpx + row1 * xw.ch,
2866 (col2-col1+1) * xw.cw,
2867 (row2-row1+1) * xw.ch);
2868 }
2869
2870 /*
2871 * Absolute coordinates.
2872 */
2873 void
2874 xclear(int x1, int y1, int x2, int y2) {
2875 XftDrawRect(xw.draw,
2876 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2877 x1, y1, x2-x1, y2-y1);
2878 }
2879
2880 void
2881 xhints(void) {
2882 XClassHint class = {opt_class ? opt_class : termname, termname};
2883 XWMHints wm = {.flags = InputHint, .input = 1};
2884 XSizeHints *sizeh = NULL;
2885
2886 sizeh = XAllocSizeHints();
2887
2888 sizeh->flags = PSize | PResizeInc | PBaseSize;
2889 sizeh->height = xw.h;
2890 sizeh->width = xw.w;
2891 sizeh->height_inc = xw.ch;
2892 sizeh->width_inc = xw.cw;
2893 sizeh->base_height = 2 * borderpx;
2894 sizeh->base_width = 2 * borderpx;
2895 if(xw.isfixed == True) {
2896 sizeh->flags |= PMaxSize | PMinSize;
2897 sizeh->min_width = sizeh->max_width = xw.w;
2898 sizeh->min_height = sizeh->max_height = xw.h;
2899 }
2900 if(xw.gm & (XValue|YValue)) {
2901 sizeh->flags |= USPosition | PWinGravity;
2902 sizeh->x = xw.l;
2903 sizeh->y = xw.t;
2904 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2905 }
2906
2907 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2908 &class);
2909 XFree(sizeh);
2910 }
2911
2912 int
2913 xgeommasktogravity(int mask) {
2914 switch(mask & (XNegative|YNegative)) {
2915 case 0:
2916 return NorthWestGravity;
2917 case XNegative:
2918 return NorthEastGravity;
2919 case YNegative:
2920 return SouthWestGravity;
2921 }
2922 return SouthEastGravity;
2923 }
2924
2925 int
2926 xloadfont(Font *f, FcPattern *pattern) {
2927 FcPattern *match;
2928 FcResult result;
2929
2930 match = FcFontMatch(NULL, pattern, &result);
2931 if(!match)
2932 return 1;
2933
2934 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2935 FcPatternDestroy(match);
2936 return 1;
2937 }
2938
2939 f->set = NULL;
2940 f->pattern = FcPatternDuplicate(pattern);
2941
2942 f->ascent = f->match->ascent;
2943 f->descent = f->match->descent;
2944 f->lbearing = 0;
2945 f->rbearing = f->match->max_advance_width;
2946
2947 f->height = f->ascent + f->descent;
2948 f->width = f->lbearing + f->rbearing;
2949
2950 return 0;
2951 }
2952
2953 void
2954 xloadfonts(char *fontstr, double fontsize) {
2955 FcPattern *pattern;
2956 FcResult r_sz, r_psz;
2957 double fontval;
2958 float ceilf(float);
2959
2960 if(fontstr[0] == '-') {
2961 pattern = XftXlfdParse(fontstr, False, False);
2962 } else {
2963 pattern = FcNameParse((FcChar8 *)fontstr);
2964 }
2965
2966 if(!pattern)
2967 die("st: can't open font %s\n", fontstr);
2968
2969 if(fontsize > 0) {
2970 FcPatternDel(pattern, FC_PIXEL_SIZE);
2971 FcPatternDel(pattern, FC_SIZE);
2972 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2973 usedfontsize = fontsize;
2974 } else {
2975 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2976 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2977 if(r_psz == FcResultMatch) {
2978 usedfontsize = fontval;
2979 } else if(r_sz == FcResultMatch) {
2980 usedfontsize = -1;
2981 } else {
2982 /*
2983 * Default font size is 12, if none given. This is to
2984 * have a known usedfontsize value.
2985 */
2986 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2987 usedfontsize = 12;
2988 }
2989 }
2990
2991 FcConfigSubstitute(0, pattern, FcMatchPattern);
2992 FcDefaultSubstitute(pattern);
2993
2994 if(xloadfont(&dc.font, pattern))
2995 die("st: can't open font %s\n", fontstr);
2996
2997 if(usedfontsize < 0) {
2998 FcPatternGetDouble(dc.font.match->pattern,
2999 FC_PIXEL_SIZE, 0, &fontval);
3000 usedfontsize = fontval;
3001 }
3002
3003 /* Setting character width and height. */
3004 xw.cw = ceilf(dc.font.width * cwscale);
3005 xw.ch = ceilf(dc.font.height * chscale);
3006
3007 FcPatternDel(pattern, FC_SLANT);
3008 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3009 if(xloadfont(&dc.ifont, pattern))
3010 die("st: can't open font %s\n", fontstr);
3011
3012 FcPatternDel(pattern, FC_WEIGHT);
3013 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3014 if(xloadfont(&dc.ibfont, pattern))
3015 die("st: can't open font %s\n", fontstr);
3016
3017 FcPatternDel(pattern, FC_SLANT);
3018 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3019 if(xloadfont(&dc.bfont, pattern))
3020 die("st: can't open font %s\n", fontstr);
3021
3022 FcPatternDestroy(pattern);
3023 }
3024
3025 int
3026 xloadfontset(Font *f) {
3027 FcResult result;
3028
3029 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3030 return 1;
3031 return 0;
3032 }
3033
3034 void
3035 xunloadfont(Font *f) {
3036 XftFontClose(xw.dpy, f->match);
3037 FcPatternDestroy(f->pattern);
3038 if(f->set)
3039 FcFontSetDestroy(f->set);
3040 }
3041
3042 void
3043 xunloadfonts(void) {
3044 /* Free the loaded fonts in the font cache. */
3045 while(frclen > 0)
3046 XftFontClose(xw.dpy, frc[--frclen].font);
3047
3048 xunloadfont(&dc.font);
3049 xunloadfont(&dc.bfont);
3050 xunloadfont(&dc.ifont);
3051 xunloadfont(&dc.ibfont);
3052 }
3053
3054 void
3055 xzoom(const Arg *arg) {
3056 xunloadfonts();
3057 xloadfonts(usedfont, usedfontsize + arg->i);
3058 cresize(0, 0);
3059 redraw(0);
3060 xhints();
3061 }
3062
3063 void
3064 xinit(void) {
3065 XGCValues gcvalues;
3066 Cursor cursor;
3067 Window parent;
3068 pid_t thispid = getpid();
3069
3070 if(!(xw.dpy = XOpenDisplay(NULL)))
3071 die("Can't open display\n");
3072 xw.scr = XDefaultScreen(xw.dpy);
3073 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3074
3075 /* font */
3076 if(!FcInit())
3077 die("Could not init fontconfig.\n");
3078
3079 usedfont = (opt_font == NULL)? font : opt_font;
3080 xloadfonts(usedfont, 0);
3081
3082 /* colors */
3083 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3084 xloadcols();
3085
3086 /* adjust fixed window geometry */
3087 xw.w = 2 * borderpx + term.col * xw.cw;
3088 xw.h = 2 * borderpx + term.row * xw.ch;
3089 if(xw.gm & XNegative)
3090 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3091 if(xw.gm & YNegative)
3092 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3093
3094 /* Events */
3095 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3096 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3097 xw.attrs.bit_gravity = NorthWestGravity;
3098 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3099 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3100 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3101 xw.attrs.colormap = xw.cmap;
3102
3103 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3104 XRootWindow(xw.dpy, xw.scr);
3105 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3106 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3107 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3108 | CWEventMask | CWColormap, &xw.attrs);
3109
3110 memset(&gcvalues, 0, sizeof(gcvalues));
3111 gcvalues.graphics_exposures = False;
3112 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3113 &gcvalues);
3114 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3115 DefaultDepth(xw.dpy, xw.scr));
3116 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3117 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3118
3119 /* Xft rendering context */
3120 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3121
3122 /* input methods */
3123 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3124 XSetLocaleModifiers("@im=local");
3125 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3126 XSetLocaleModifiers("@im=");
3127 if((xw.xim = XOpenIM(xw.dpy,
3128 NULL, NULL, NULL)) == NULL) {
3129 die("XOpenIM failed. Could not open input"
3130 " device.\n");
3131 }
3132 }
3133 }
3134 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3135 | XIMStatusNothing, XNClientWindow, xw.win,
3136 XNFocusWindow, xw.win, NULL);
3137 if(xw.xic == NULL)
3138 die("XCreateIC failed. Could not obtain input method.\n");
3139
3140 /* white cursor, black outline */
3141 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3142 XDefineCursor(xw.dpy, xw.win, cursor);
3143 XRecolorCursor(xw.dpy, cursor,
3144 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3145 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3146
3147 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3148 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3149 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3150 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3151
3152 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3153 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3154 PropModeReplace, (uchar *)&thispid, 1);
3155
3156 xresettitle();
3157 XMapWindow(xw.dpy, xw.win);
3158 xhints();
3159 XSync(xw.dpy, False);
3160 }
3161
3162 void
3163 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3164 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3165 width = charlen * xw.cw, xp, i;
3166 int frcflags;
3167 int u8fl, u8fblen, u8cblen, doesexist;
3168 char *u8c, *u8fs;
3169 long unicodep;
3170 Font *font = &dc.font;
3171 FcResult fcres;
3172 FcPattern *fcpattern, *fontpattern;
3173 FcFontSet *fcsets[] = { NULL };
3174 FcCharSet *fccharset;
3175 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3176 XRenderColor colfg, colbg;
3177 XRectangle r;
3178 int oneatatime;
3179
3180 frcflags = FRC_NORMAL;
3181
3182 if(base.mode & ATTR_ITALIC) {
3183 if(base.fg == defaultfg)
3184 base.fg = defaultitalic;
3185 font = &dc.ifont;
3186 frcflags = FRC_ITALIC;
3187 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3188 if(base.fg == defaultfg)
3189 base.fg = defaultitalic;
3190 font = &dc.ibfont;
3191 frcflags = FRC_ITALICBOLD;
3192 } else if(base.mode & ATTR_UNDERLINE) {
3193 if(base.fg == defaultfg)
3194 base.fg = defaultunderline;
3195 }
3196
3197 if(IS_TRUECOL(base.fg)) {
3198 colfg.alpha = 0xffff;
3199 colfg.red = TRUERED(base.fg);
3200 colfg.green = TRUEGREEN(base.fg);
3201 colfg.blue = TRUEBLUE(base.fg);
3202 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3203 fg = &truefg;
3204 } else {
3205 fg = &dc.col[base.fg];
3206 }
3207
3208 if(IS_TRUECOL(base.bg)) {
3209 colbg.alpha = 0xffff;
3210 colbg.green = TRUEGREEN(base.bg);
3211 colbg.red = TRUERED(base.bg);
3212 colbg.blue = TRUEBLUE(base.bg);
3213 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3214 bg = &truebg;
3215 } else {
3216 bg = &dc.col[base.bg];
3217 }
3218
3219 if(base.mode & ATTR_BOLD) {
3220 /*
3221 * change basic system colors [0-7]
3222 * to bright system colors [8-15]
3223 */
3224 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3225 fg = &dc.col[base.fg + 8];
3226
3227 if(base.mode & ATTR_ITALIC) {
3228 font = &dc.ibfont;
3229 frcflags = FRC_ITALICBOLD;
3230 } else {
3231 font = &dc.bfont;
3232 frcflags = FRC_BOLD;
3233 }
3234 }
3235
3236 if(IS_SET(MODE_REVERSE)) {
3237 if(fg == &dc.col[defaultfg]) {
3238 fg = &dc.col[defaultbg];
3239 } else {
3240 colfg.red = ~fg->color.red;
3241 colfg.green = ~fg->color.green;
3242 colfg.blue = ~fg->color.blue;
3243 colfg.alpha = fg->color.alpha;
3244 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3245 &revfg);
3246 fg = &revfg;
3247 }
3248
3249 if(bg == &dc.col[defaultbg]) {
3250 bg = &dc.col[defaultfg];
3251 } else {
3252 colbg.red = ~bg->color.red;
3253 colbg.green = ~bg->color.green;
3254 colbg.blue = ~bg->color.blue;
3255 colbg.alpha = bg->color.alpha;
3256 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3257 &revbg);
3258 bg = &revbg;
3259 }
3260 }
3261
3262 if(base.mode & ATTR_REVERSE) {
3263 temp = fg;
3264 fg = bg;
3265 bg = temp;
3266 }
3267
3268 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3269 colfg.red = fg->color.red / 2;
3270 colfg.green = fg->color.green / 2;
3271 colfg.blue = fg->color.blue / 2;
3272 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3273 fg = &revfg;
3274 }
3275
3276 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3277 fg = bg;
3278
3279 if(base.mode & ATTR_INVISIBLE)
3280 fg = bg;
3281
3282 /* Intelligent cleaning up of the borders. */
3283 if(x == 0) {
3284 xclear(0, (y == 0)? 0 : winy, borderpx,
3285 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3286 }
3287 if(x + charlen >= term.col) {
3288 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3289 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3290 }
3291 if(y == 0)
3292 xclear(winx, 0, winx + width, borderpx);
3293 if(y == term.row-1)
3294 xclear(winx, winy + xw.ch, winx + width, xw.h);
3295
3296 /* Clean up the region we want to draw to. */
3297 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3298
3299 /* Set the clip region because Xft is sometimes dirty. */
3300 r.x = 0;
3301 r.y = 0;
3302 r.height = xw.ch;
3303 r.width = width;
3304 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3305
3306 for(xp = winx; bytelen > 0;) {
3307 /*
3308 * Search for the range in the to be printed string of glyphs
3309 * that are in the main font. Then print that range. If
3310 * some glyph is found that is not in the font, do the
3311 * fallback dance.
3312 */
3313 u8fs = s;
3314 u8fblen = 0;
3315 u8fl = 0;
3316 oneatatime = font->width != xw.cw;
3317 for(;;) {
3318 u8c = s;
3319 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3320 s += u8cblen;
3321 bytelen -= u8cblen;
3322
3323 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3324 if(doesexist) {
3325 u8fl++;
3326 u8fblen += u8cblen;
3327 if(!oneatatime && bytelen > 0)
3328 continue;
3329 }
3330
3331 if(u8fl > 0) {
3332 XftDrawStringUtf8(xw.draw, fg,
3333 font->match, xp,
3334 winy + font->ascent,
3335 (FcChar8 *)u8fs,
3336 u8fblen);
3337 xp += xw.cw * u8fl;
3338 }
3339 break;
3340 }
3341 if(doesexist) {
3342 if(oneatatime)
3343 continue;
3344 break;
3345 }
3346
3347 /* Search the font cache. */
3348 for(i = 0; i < frclen; i++) {
3349 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3350 && frc[i].flags == frcflags) {
3351 break;
3352 }
3353 }
3354
3355 /* Nothing was found. */
3356 if(i >= frclen) {
3357 if(!font->set)
3358 xloadfontset(font);
3359 fcsets[0] = font->set;
3360
3361 /*
3362 * Nothing was found in the cache. Now use
3363 * some dozen of Fontconfig calls to get the
3364 * font for one single character.
3365 *
3366 * Xft and fontconfig are design failures.
3367 */
3368 fcpattern = FcPatternDuplicate(font->pattern);
3369 fccharset = FcCharSetCreate();
3370
3371 FcCharSetAddChar(fccharset, unicodep);
3372 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3373 fccharset);
3374 FcPatternAddBool(fcpattern, FC_SCALABLE,
3375 FcTrue);
3376
3377 FcConfigSubstitute(0, fcpattern,
3378 FcMatchPattern);
3379 FcDefaultSubstitute(fcpattern);
3380
3381 fontpattern = FcFontSetMatch(0, fcsets,
3382 FcTrue, fcpattern, &fcres);
3383
3384 /*
3385 * Overwrite or create the new cache entry.
3386 */
3387 if(frclen >= LEN(frc)) {
3388 frclen = LEN(frc) - 1;
3389 XftFontClose(xw.dpy, frc[frclen].font);
3390 }
3391
3392 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3393 fontpattern);
3394 frc[frclen].flags = frcflags;
3395
3396 i = frclen;
3397 frclen++;
3398
3399 FcPatternDestroy(fcpattern);
3400 FcCharSetDestroy(fccharset);
3401 }
3402
3403 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3404 xp, winy + frc[i].font->ascent,
3405 (FcChar8 *)u8c, u8cblen);
3406
3407 xp += xw.cw * wcwidth(unicodep);
3408 }
3409
3410 /*
3411 * This is how the loop above actually should be. Why does the
3412 * application have to care about font details?
3413 *
3414 * I have to repeat: Xft and Fontconfig are design failures.
3415 */
3416 /*
3417 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3418 winy + font->ascent, (FcChar8 *)s, bytelen);
3419 */
3420
3421 if(base.mode & ATTR_UNDERLINE) {
3422 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3423 width, 1);
3424 }
3425
3426 if(base.mode & ATTR_STRUCK) {
3427 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3428 width, 1);
3429 }
3430
3431 /* Reset clip to none. */
3432 XftDrawSetClip(xw.draw, 0);
3433 }
3434
3435 void
3436 xdrawcursor(void) {
3437 static int oldx = 0, oldy = 0;
3438 int sl, width, curx;
3439 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3440
3441 LIMIT(oldx, 0, term.col-1);
3442 LIMIT(oldy, 0, term.row-1);
3443
3444 curx = term.c.x;
3445
3446 /* adjust position if in dummy */
3447 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3448 oldx--;
3449 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3450 curx--;
3451
3452 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3453
3454 /* remove the old cursor */
3455 sl = utf8len(term.line[oldy][oldx].c);
3456 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3457 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3458 oldy, width, sl);
3459
3460 /* draw the new one */
3461 if(!(IS_SET(MODE_HIDE))) {
3462 if(xw.state & WIN_FOCUSED) {
3463 if(IS_SET(MODE_REVERSE)) {
3464 g.mode |= ATTR_REVERSE;
3465 g.fg = defaultcs;
3466 g.bg = defaultfg;
3467 }
3468
3469 sl = utf8len(g.c);
3470 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3471 ? 2 : 1;
3472 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3473 } else {
3474 XftDrawRect(xw.draw, &dc.col[defaultcs],
3475 borderpx + curx * xw.cw,
3476 borderpx + term.c.y * xw.ch,
3477 xw.cw - 1, 1);
3478 XftDrawRect(xw.draw, &dc.col[defaultcs],
3479 borderpx + curx * xw.cw,
3480 borderpx + term.c.y * xw.ch,
3481 1, xw.ch - 1);
3482 XftDrawRect(xw.draw, &dc.col[defaultcs],
3483 borderpx + (curx + 1) * xw.cw - 1,
3484 borderpx + term.c.y * xw.ch,
3485 1, xw.ch - 1);
3486 XftDrawRect(xw.draw, &dc.col[defaultcs],
3487 borderpx + curx * xw.cw,
3488 borderpx + (term.c.y + 1) * xw.ch - 1,
3489 xw.cw, 1);
3490 }
3491 oldx = curx, oldy = term.c.y;
3492 }
3493 }
3494
3495
3496 void
3497 xsettitle(char *p) {
3498 XTextProperty prop;
3499
3500 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3501 &prop);
3502 XSetWMName(xw.dpy, xw.win, &prop);
3503 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3504 XFree(prop.value);
3505 }
3506
3507 void
3508 xresettitle(void) {
3509 xsettitle(opt_title ? opt_title : "st");
3510 }
3511
3512 void
3513 redraw(int timeout) {
3514 struct timespec tv = {0, timeout * 1000};
3515
3516 tfulldirt();
3517 draw();
3518
3519 if(timeout > 0) {
3520 nanosleep(&tv, NULL);
3521 XSync(xw.dpy, False); /* necessary for a good tput flash */
3522 }
3523 }
3524
3525 void
3526 draw(void) {
3527 drawregion(0, 0, term.col, term.row);
3528 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3529 xw.h, 0, 0);
3530 XSetForeground(xw.dpy, dc.gc,
3531 dc.col[IS_SET(MODE_REVERSE)?
3532 defaultfg : defaultbg].pixel);
3533 }
3534
3535 void
3536 drawregion(int x1, int y1, int x2, int y2) {
3537 int ic, ib, x, y, ox, sl;
3538 Glyph base, new;
3539 char buf[DRAW_BUF_SIZ];
3540 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3541 long unicodep;
3542
3543 if(!(xw.state & WIN_VISIBLE))
3544 return;
3545
3546 for(y = y1; y < y2; y++) {
3547 if(!term.dirty[y])
3548 continue;
3549
3550 xtermclear(0, y, term.col, y);
3551 term.dirty[y] = 0;
3552 base = term.line[y][0];
3553 ic = ib = ox = 0;
3554 for(x = x1; x < x2; x++) {
3555 new = term.line[y][x];
3556 if(new.mode == ATTR_WDUMMY)
3557 continue;
3558 if(ena_sel && selected(x, y))
3559 new.mode ^= ATTR_REVERSE;
3560 if(ib > 0 && (ATTRCMP(base, new)
3561 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3562 xdraws(buf, base, ox, y, ic, ib);
3563 ic = ib = 0;
3564 }
3565 if(ib == 0) {
3566 ox = x;
3567 base = new;
3568 }
3569
3570 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3571 memcpy(buf+ib, new.c, sl);
3572 ib += sl;
3573 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3574 }
3575 if(ib > 0)
3576 xdraws(buf, base, ox, y, ic, ib);
3577 }
3578 xdrawcursor();
3579 }
3580
3581 void
3582 expose(XEvent *ev) {
3583 XExposeEvent *e = &ev->xexpose;
3584
3585 if(xw.state & WIN_REDRAW) {
3586 if(!e->count)
3587 xw.state &= ~WIN_REDRAW;
3588 }
3589 redraw(0);
3590 }
3591
3592 void
3593 visibility(XEvent *ev) {
3594 XVisibilityEvent *e = &ev->xvisibility;
3595
3596 if(e->state == VisibilityFullyObscured) {
3597 xw.state &= ~WIN_VISIBLE;
3598 } else if(!(xw.state & WIN_VISIBLE)) {
3599 /* need a full redraw for next Expose, not just a buf copy */
3600 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3601 }
3602 }
3603
3604 void
3605 unmap(XEvent *ev) {
3606 xw.state &= ~WIN_VISIBLE;
3607 }
3608
3609 void
3610 xsetpointermotion(int set) {
3611 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3612 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3613 }
3614
3615 void
3616 xseturgency(int add) {
3617 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3618
3619 MODBIT(h->flags, add, XUrgencyHint);
3620 XSetWMHints(xw.dpy, xw.win, h);
3621 XFree(h);
3622 }
3623
3624 void
3625 focus(XEvent *ev) {
3626 XFocusChangeEvent *e = &ev->xfocus;
3627
3628 if(e->mode == NotifyGrab)
3629 return;
3630
3631 if(ev->type == FocusIn) {
3632 XSetICFocus(xw.xic);
3633 xw.state |= WIN_FOCUSED;
3634 xseturgency(0);
3635 if(IS_SET(MODE_FOCUS))
3636 ttywrite("\033[I", 3);
3637 } else {
3638 XUnsetICFocus(xw.xic);
3639 xw.state &= ~WIN_FOCUSED;
3640 if(IS_SET(MODE_FOCUS))
3641 ttywrite("\033[O", 3);
3642 }
3643 }
3644
3645 static inline bool
3646 match(uint mask, uint state) {
3647 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3648 }
3649
3650 void
3651 numlock(const Arg *dummy) {
3652 term.numlock ^= 1;
3653 }
3654
3655 char*
3656 kmap(KeySym k, uint state) {
3657 Key *kp;
3658 int i;
3659
3660 /* Check for mapped keys out of X11 function keys. */
3661 for(i = 0; i < LEN(mappedkeys); i++) {
3662 if(mappedkeys[i] == k)
3663 break;
3664 }
3665 if(i == LEN(mappedkeys)) {
3666 if((k & 0xFFFF) < 0xFD00)
3667 return NULL;
3668 }
3669
3670 for(kp = key; kp < key + LEN(key); kp++) {
3671 if(kp->k != k)
3672 continue;
3673
3674 if(!match(kp->mask, state))
3675 continue;
3676
3677 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3678 continue;
3679 if(term.numlock && kp->appkey == 2)
3680 continue;
3681
3682 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3683 continue;
3684
3685 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3686 continue;
3687
3688 return kp->s;
3689 }
3690
3691 return NULL;
3692 }
3693
3694 void
3695 kpress(XEvent *ev) {
3696 XKeyEvent *e = &ev->xkey;
3697 KeySym ksym;
3698 char buf[32], *customkey;
3699 int len;
3700 long c;
3701 Status status;
3702 Shortcut *bp;
3703
3704 if(IS_SET(MODE_KBDLOCK))
3705 return;
3706
3707 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3708 /* 1. shortcuts */
3709 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3710 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3711 bp->func(&(bp->arg));
3712 return;
3713 }
3714 }
3715
3716 /* 2. custom keys from config.h */
3717 if((customkey = kmap(ksym, e->state))) {
3718 ttysend(customkey, strlen(customkey));
3719 return;
3720 }
3721
3722 /* 3. composed string from input method */
3723 if(len == 0)
3724 return;
3725 if(len == 1 && e->state & Mod1Mask) {
3726 if(IS_SET(MODE_8BIT)) {
3727 if(*buf < 0177) {
3728 c = *buf | 0x80;
3729 len = utf8encode(c, buf, UTF_SIZ);
3730 }
3731 } else {
3732 buf[1] = buf[0];
3733 buf[0] = '\033';
3734 len = 2;
3735 }
3736 }
3737 ttysend(buf, len);
3738 }
3739
3740
3741 void
3742 cmessage(XEvent *e) {
3743 /*
3744 * See xembed specs
3745 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3746 */
3747 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3748 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3749 xw.state |= WIN_FOCUSED;
3750 xseturgency(0);
3751 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3752 xw.state &= ~WIN_FOCUSED;
3753 }
3754 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3755 /* Send SIGHUP to shell */
3756 kill(pid, SIGHUP);
3757 exit(EXIT_SUCCESS);
3758 }
3759 }
3760
3761 void
3762 cresize(int width, int height) {
3763 int col, row;
3764
3765 if(width != 0)
3766 xw.w = width;
3767 if(height != 0)
3768 xw.h = height;
3769
3770 col = (xw.w - 2 * borderpx) / xw.cw;
3771 row = (xw.h - 2 * borderpx) / xw.ch;
3772
3773 tresize(col, row);
3774 xresize(col, row);
3775 ttyresize();
3776 }
3777
3778 void
3779 resize(XEvent *e) {
3780 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3781 return;
3782
3783 cresize(e->xconfigure.width, e->xconfigure.height);
3784 }
3785
3786 void
3787 run(void) {
3788 XEvent ev;
3789 int w = xw.w, h = xw.h;
3790 fd_set rfd;
3791 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3792 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3793 long deltatime;
3794
3795 /* Waiting for window mapping */
3796 while(1) {
3797 XNextEvent(xw.dpy, &ev);
3798 if(XFilterEvent(&ev, None))
3799 continue;
3800 if(ev.type == ConfigureNotify) {
3801 w = ev.xconfigure.width;
3802 h = ev.xconfigure.height;
3803 } else if(ev.type == MapNotify) {
3804 break;
3805 }
3806 }
3807
3808 ttynew();
3809 cresize(w, h);
3810
3811 clock_gettime(CLOCK_MONOTONIC, &last);
3812 lastblink = last;
3813
3814 for(xev = actionfps;;) {
3815 FD_ZERO(&rfd);
3816 FD_SET(cmdfd, &rfd);
3817 FD_SET(xfd, &rfd);
3818
3819 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3820 if(errno == EINTR)
3821 continue;
3822 die("select failed: %s\n", strerror(errno));
3823 }
3824 if(FD_ISSET(cmdfd, &rfd)) {
3825 ttyread();
3826 if(blinktimeout) {
3827 blinkset = tattrset(ATTR_BLINK);
3828 if(!blinkset)
3829 MODBIT(term.mode, 0, MODE_BLINK);
3830 }
3831 }
3832
3833 if(FD_ISSET(xfd, &rfd))
3834 xev = actionfps;
3835
3836 clock_gettime(CLOCK_MONOTONIC, &now);
3837 drawtimeout.tv_sec = 0;
3838 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3839 tv = &drawtimeout;
3840
3841 dodraw = 0;
3842 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3843 tsetdirtattr(ATTR_BLINK);
3844 term.mode ^= MODE_BLINK;
3845 lastblink = now;
3846 dodraw = 1;
3847 }
3848 deltatime = TIMEDIFF(now, last);
3849 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3850 || deltatime < 0) {
3851 dodraw = 1;
3852 last = now;
3853 }
3854
3855 if(dodraw) {
3856 while(XPending(xw.dpy)) {
3857 XNextEvent(xw.dpy, &ev);
3858 if(XFilterEvent(&ev, None))
3859 continue;
3860 if(handler[ev.type])
3861 (handler[ev.type])(&ev);
3862 }
3863
3864 draw();
3865 XFlush(xw.dpy);
3866
3867 if(xev && !FD_ISSET(xfd, &rfd))
3868 xev--;
3869 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3870 if(blinkset) {
3871 if(TIMEDIFF(now, lastblink) \
3872 > blinktimeout) {
3873 drawtimeout.tv_nsec = 1000;
3874 } else {
3875 drawtimeout.tv_nsec = (1E6 * \
3876 (blinktimeout - \
3877 TIMEDIFF(now,
3878 lastblink)));
3879 }
3880 } else {
3881 tv = NULL;
3882 }
3883 }
3884 }
3885 }
3886 }
3887
3888 void
3889 usage(void) {
3890 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3891 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3892 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3893 }
3894
3895 int
3896 main(int argc, char *argv[]) {
3897 char *titles;
3898 uint cols = 80, rows = 24;
3899
3900 xw.l = xw.t = 0;
3901 xw.isfixed = False;
3902
3903 ARGBEGIN {
3904 case 'a':
3905 allowaltscreen = false;
3906 break;
3907 case 'c':
3908 opt_class = EARGF(usage());
3909 break;
3910 case 'e':
3911 /* eat all remaining arguments */
3912 if(argc > 1) {
3913 opt_cmd = &argv[1];
3914 if(argv[1] != NULL && opt_title == NULL) {
3915 titles = xstrdup(argv[1]);
3916 opt_title = basename(titles);
3917 }
3918 }
3919 goto run;
3920 case 'f':
3921 opt_font = EARGF(usage());
3922 break;
3923 case 'g':
3924 xw.gm = XParseGeometry(EARGF(usage()),
3925 &xw.l, &xw.t, &cols, &rows);
3926 break;
3927 case 'i':
3928 xw.isfixed = True;
3929 break;
3930 case 'o':
3931 opt_io = EARGF(usage());
3932 break;
3933 case 't':
3934 opt_title = EARGF(usage());
3935 break;
3936 case 'w':
3937 opt_embed = EARGF(usage());
3938 break;
3939 case 'v':
3940 default:
3941 usage();
3942 } ARGEND;
3943
3944 run:
3945 setlocale(LC_CTYPE, "");
3946 XSetLocaleModifiers("");
3947 tnew(cols? cols : 1, rows? rows : 1);
3948 xinit();
3949 selinit();
3950 run();
3951
3952 return 0;
3953 }
3954