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reset the alt screen in treset
[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))
74 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
75 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
80 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
81
82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
83 #define IS_TRUECOL(x) (1 << 24 & (x))
84 #define TRUERED(x) (((x) & 0xff0000) >> 8)
85 #define TRUEGREEN(x) (((x) & 0xff00))
86 #define TRUEBLUE(x) (((x) & 0xff) << 8)
87
88
89 enum glyph_attribute {
90 ATTR_NULL = 0,
91 ATTR_BOLD = 1,
92 ATTR_FAINT = 2,
93 ATTR_ITALIC = 4,
94 ATTR_UNDERLINE = 8,
95 ATTR_BLINK = 16,
96 ATTR_REVERSE = 32,
97 ATTR_INVISIBLE = 64,
98 ATTR_STRUCK = 128,
99 ATTR_WRAP = 256,
100 ATTR_WIDE = 512,
101 ATTR_WDUMMY = 1024,
102 };
103
104 enum cursor_movement {
105 CURSOR_SAVE,
106 CURSOR_LOAD
107 };
108
109 enum cursor_state {
110 CURSOR_DEFAULT = 0,
111 CURSOR_WRAPNEXT = 1,
112 CURSOR_ORIGIN = 2
113 };
114
115 enum term_mode {
116 MODE_WRAP = 1,
117 MODE_INSERT = 2,
118 MODE_APPKEYPAD = 4,
119 MODE_ALTSCREEN = 8,
120 MODE_CRLF = 16,
121 MODE_MOUSEBTN = 32,
122 MODE_MOUSEMOTION = 64,
123 MODE_REVERSE = 128,
124 MODE_KBDLOCK = 256,
125 MODE_HIDE = 512,
126 MODE_ECHO = 1024,
127 MODE_APPCURSOR = 2048,
128 MODE_MOUSESGR = 4096,
129 MODE_8BIT = 8192,
130 MODE_BLINK = 16384,
131 MODE_FBLINK = 32768,
132 MODE_FOCUS = 65536,
133 MODE_MOUSEX10 = 131072,
134 MODE_MOUSEMANY = 262144,
135 MODE_BRCKTPASTE = 524288,
136 MODE_PRINT = 1048576,
137 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
138 |MODE_MOUSEMANY,
139 };
140
141 enum charset {
142 CS_GRAPHIC0,
143 CS_GRAPHIC1,
144 CS_UK,
145 CS_USA,
146 CS_MULTI,
147 CS_GER,
148 CS_FIN
149 };
150
151 enum escape_state {
152 ESC_START = 1,
153 ESC_CSI = 2,
154 ESC_STR = 4, /* DCS, OSC, PM, APC */
155 ESC_ALTCHARSET = 8,
156 ESC_STR_END = 16, /* a final string was encountered */
157 ESC_TEST = 32, /* Enter in test mode */
158 };
159
160 enum window_state {
161 WIN_VISIBLE = 1,
162 WIN_REDRAW = 2,
163 WIN_FOCUSED = 4
164 };
165
166 enum selection_type {
167 SEL_REGULAR = 1,
168 SEL_RECTANGULAR = 2
169 };
170
171 enum selection_snap {
172 SNAP_WORD = 1,
173 SNAP_LINE = 2
174 };
175
176 typedef unsigned char uchar;
177 typedef unsigned int uint;
178 typedef unsigned long ulong;
179 typedef unsigned short ushort;
180
181 typedef XftDraw *Draw;
182 typedef XftColor Color;
183
184 typedef struct {
185 char c[UTF_SIZ]; /* character code */
186 ushort mode; /* attribute flags */
187 uint32_t fg; /* foreground */
188 uint32_t bg; /* background */
189 } Glyph;
190
191 typedef Glyph *Line;
192
193 typedef struct {
194 Glyph attr; /* current char attributes */
195 int x;
196 int y;
197 char state;
198 } TCursor;
199
200 /* CSI Escape sequence structs */
201 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
202 typedef struct {
203 char buf[ESC_BUF_SIZ]; /* raw string */
204 int len; /* raw string length */
205 char priv;
206 int arg[ESC_ARG_SIZ];
207 int narg; /* nb of args */
208 char mode;
209 } CSIEscape;
210
211 /* STR Escape sequence structs */
212 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
213 typedef struct {
214 char type; /* ESC type ... */
215 char buf[STR_BUF_SIZ]; /* raw string */
216 int len; /* raw string length */
217 char *args[STR_ARG_SIZ];
218 int narg; /* nb of args */
219 } STREscape;
220
221 /* Internal representation of the screen */
222 typedef struct {
223 int row; /* nb row */
224 int col; /* nb col */
225 Line *line; /* screen */
226 Line *alt; /* alternate screen */
227 bool *dirty; /* dirtyness of lines */
228 TCursor c; /* cursor */
229 int top; /* top scroll limit */
230 int bot; /* bottom scroll limit */
231 int mode; /* terminal mode flags */
232 int esc; /* escape state flags */
233 char trantbl[4]; /* charset table translation */
234 int charset; /* current charset */
235 int icharset; /* selected charset for sequence */
236 bool numlock; /* lock numbers in keyboard */
237 bool *tabs;
238 } Term;
239
240 /* Purely graphic info */
241 typedef struct {
242 Display *dpy;
243 Colormap cmap;
244 Window win;
245 Drawable buf;
246 Atom xembed, wmdeletewin, netwmname, netwmpid;
247 XIM xim;
248 XIC xic;
249 Draw draw;
250 Visual *vis;
251 XSetWindowAttributes attrs;
252 int scr;
253 bool isfixed; /* is fixed geometry? */
254 int l, t; /* left and top offset */
255 int gm; /* geometry mask */
256 int tw, th; /* tty width and height */
257 int w, h; /* window width and height */
258 int ch; /* char height */
259 int cw; /* char width */
260 char state; /* focus, redraw, visible */
261 } XWindow;
262
263 typedef struct {
264 uint b;
265 uint mask;
266 char *s;
267 } Mousekey;
268
269 typedef struct {
270 KeySym k;
271 uint mask;
272 char *s;
273 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
274 signed char appkey; /* application keypad */
275 signed char appcursor; /* application cursor */
276 signed char crlf; /* crlf mode */
277 } Key;
278
279 typedef struct {
280 int mode;
281 int type;
282 int snap;
283 /*
284 * Selection variables:
285 * nb – normalized coordinates of the beginning of the selection
286 * ne – normalized coordinates of the end of the selection
287 * ob – original coordinates of the beginning of the selection
288 * oe – original coordinates of the end of the selection
289 */
290 struct {
291 int x, y;
292 } nb, ne, ob, oe;
293
294 char *clip;
295 Atom xtarget;
296 bool alt;
297 struct timespec tclick1;
298 struct timespec tclick2;
299 } Selection;
300
301 typedef union {
302 int i;
303 uint ui;
304 float f;
305 const void *v;
306 } Arg;
307
308 typedef struct {
309 uint mod;
310 KeySym keysym;
311 void (*func)(const Arg *);
312 const Arg arg;
313 } Shortcut;
314
315 /* function definitions used in config.h */
316 static void clippaste(const Arg *);
317 static void numlock(const Arg *);
318 static void selpaste(const Arg *);
319 static void xzoom(const Arg *);
320 static void printsel(const Arg *);
321 static void printscreen(const Arg *) ;
322 static void toggleprinter(const Arg *);
323
324 /* Config.h for applying patches and the configuration. */
325 #include "config.h"
326
327 /* Font structure */
328 typedef struct {
329 int height;
330 int width;
331 int ascent;
332 int descent;
333 short lbearing;
334 short rbearing;
335 XftFont *match;
336 FcFontSet *set;
337 FcPattern *pattern;
338 } Font;
339
340 /* Drawing Context */
341 typedef struct {
342 Color col[MAX(LEN(colorname), 256)];
343 Font font, bfont, ifont, ibfont;
344 GC gc;
345 } DC;
346
347 static void die(const char *, ...);
348 static void draw(void);
349 static void redraw(int);
350 static void drawregion(int, int, int, int);
351 static void execsh(void);
352 static void sigchld(int);
353 static void run(void);
354
355 static void csidump(void);
356 static void csihandle(void);
357 static void csiparse(void);
358 static void csireset(void);
359 static void strdump(void);
360 static void strhandle(void);
361 static void strparse(void);
362 static void strreset(void);
363
364 static int tattrset(int);
365 static void tprinter(char *, size_t);
366 static void tdumpsel(void);
367 static void tdumpline(int);
368 static void tdump(void);
369 static void tclearregion(int, int, int, int);
370 static void tcursor(int);
371 static void tdeletechar(int);
372 static void tdeleteline(int);
373 static void tinsertblank(int);
374 static void tinsertblankline(int);
375 static int tlinelen(int);
376 static void tmoveto(int, int);
377 static void tmoveato(int, int);
378 static void tnew(int, int);
379 static void tnewline(int);
380 static void tputtab(int);
381 static void tputc(char *, int);
382 static void treset(void);
383 static void tresize(int, int);
384 static void tscrollup(int, int);
385 static void tscrolldown(int, int);
386 static void tsetattr(int *, int);
387 static void tsetchar(char *, Glyph *, int, int);
388 static void tsetscroll(int, int);
389 static void tswapscreen(void);
390 static void tsetdirt(int, int);
391 static void tsetdirtattr(int);
392 static void tsetmode(bool, bool, int *, int);
393 static void tfulldirt(void);
394 static void techo(char *, int);
395 static void tcontrolcode(uchar );
396 static void tdectest(char );
397 static int32_t tdefcolor(int *, int *, int);
398 static void tdeftran(char);
399 static inline bool match(uint, uint);
400 static void ttynew(void);
401 static void ttyread(void);
402 static void ttyresize(void);
403 static void ttysend(char *, size_t);
404 static void ttywrite(const char *, size_t);
405 static void tstrsequence(uchar c);
406
407 static void xdraws(char *, Glyph, int, int, int, int);
408 static void xhints(void);
409 static void xclear(int, int, int, int);
410 static void xdrawcursor(void);
411 static void xinit(void);
412 static void xloadcols(void);
413 static int xsetcolorname(int, const char *);
414 static int xgeommasktogravity(int);
415 static int xloadfont(Font *, FcPattern *);
416 static void xloadfonts(char *, double);
417 static int xloadfontset(Font *);
418 static void xsettitle(char *);
419 static void xresettitle(void);
420 static void xsetpointermotion(int);
421 static void xseturgency(int);
422 static void xsetsel(char *);
423 static void xtermclear(int, int, int, int);
424 static void xunloadfont(Font *);
425 static void xunloadfonts(void);
426 static void xresize(int, int);
427
428 static void expose(XEvent *);
429 static void visibility(XEvent *);
430 static void unmap(XEvent *);
431 static char *kmap(KeySym, uint);
432 static void kpress(XEvent *);
433 static void cmessage(XEvent *);
434 static void cresize(int, int);
435 static void resize(XEvent *);
436 static void focus(XEvent *);
437 static void brelease(XEvent *);
438 static void bpress(XEvent *);
439 static void bmotion(XEvent *);
440 static void selnotify(XEvent *);
441 static void selclear(XEvent *);
442 static void selrequest(XEvent *);
443
444 static void selinit(void);
445 static void selnormalize(void);
446 static inline bool selected(int, int);
447 static char *getsel(void);
448 static void selcopy(void);
449 static void selscroll(int, int);
450 static void selsnap(int, int *, int *, int);
451 static void getbuttoninfo(XEvent *);
452 static void mousereport(XEvent *);
453
454 static size_t utf8decode(char *, long *, size_t);
455 static long utf8decodebyte(char, size_t *);
456 static size_t utf8encode(long, char *, size_t);
457 static char utf8encodebyte(long, size_t);
458 static size_t utf8len(char *);
459 static size_t utf8validate(long *, size_t);
460
461 static ssize_t xwrite(int, const char *, size_t);
462 static void *xmalloc(size_t);
463 static void *xrealloc(void *, size_t);
464 static char *xstrdup(char *);
465
466 static void usage(void);
467
468 static void (*handler[LASTEvent])(XEvent *) = {
469 [KeyPress] = kpress,
470 [ClientMessage] = cmessage,
471 [ConfigureNotify] = resize,
472 [VisibilityNotify] = visibility,
473 [UnmapNotify] = unmap,
474 [Expose] = expose,
475 [FocusIn] = focus,
476 [FocusOut] = focus,
477 [MotionNotify] = bmotion,
478 [ButtonPress] = bpress,
479 [ButtonRelease] = brelease,
480 [SelectionClear] = selclear,
481 [SelectionNotify] = selnotify,
482 [SelectionRequest] = selrequest,
483 };
484
485 /* Globals */
486 static DC dc;
487 static XWindow xw;
488 static Term term;
489 static CSIEscape csiescseq;
490 static STREscape strescseq;
491 static int cmdfd;
492 static pid_t pid;
493 static Selection sel;
494 static int iofd = STDOUT_FILENO;
495 static char **opt_cmd = NULL;
496 static char *opt_io = NULL;
497 static char *opt_title = NULL;
498 static char *opt_embed = NULL;
499 static char *opt_class = NULL;
500 static char *opt_font = NULL;
501 static int oldbutton = 3; /* button event on startup: 3 = release */
502
503 static char *usedfont = NULL;
504 static double usedfontsize = 0;
505
506 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
507 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
508 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
509 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
510
511 /* Font Ring Cache */
512 enum {
513 FRC_NORMAL,
514 FRC_ITALIC,
515 FRC_BOLD,
516 FRC_ITALICBOLD
517 };
518
519 typedef struct {
520 XftFont *font;
521 int flags;
522 } Fontcache;
523
524 /* Fontcache is an array now. A new font will be appended to the array. */
525 static Fontcache frc[16];
526 static int frclen = 0;
527
528 ssize_t
529 xwrite(int fd, const char *s, size_t len) {
530 size_t aux = len;
531
532 while(len > 0) {
533 ssize_t r = write(fd, s, len);
534 if(r < 0)
535 return r;
536 len -= r;
537 s += r;
538 }
539 return aux;
540 }
541
542 void *
543 xmalloc(size_t len) {
544 void *p = malloc(len);
545
546 if(!p)
547 die("Out of memory\n");
548
549 return p;
550 }
551
552 void *
553 xrealloc(void *p, size_t len) {
554 if((p = realloc(p, len)) == NULL)
555 die("Out of memory\n");
556
557 return p;
558 }
559
560 char *
561 xstrdup(char *s) {
562 if((s = strdup(s)) == NULL)
563 die("Out of memory\n");
564
565 return s;
566 }
567
568 size_t
569 utf8decode(char *c, long *u, size_t clen) {
570 size_t i, j, len, type;
571 long udecoded;
572
573 *u = UTF_INVALID;
574 if(!clen)
575 return 0;
576 udecoded = utf8decodebyte(c[0], &len);
577 if(!BETWEEN(len, 1, UTF_SIZ))
578 return 1;
579 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
580 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
581 if(type != 0)
582 return j;
583 }
584 if(j < len)
585 return 0;
586 *u = udecoded;
587 utf8validate(u, len);
588 return len;
589 }
590
591 long
592 utf8decodebyte(char c, size_t *i) {
593 for(*i = 0; *i < LEN(utfmask); ++(*i))
594 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
595 return (uchar)c & ~utfmask[*i];
596 return 0;
597 }
598
599 size_t
600 utf8encode(long u, char *c, size_t clen) {
601 size_t len, i;
602
603 len = utf8validate(&u, 0);
604 if(clen < len)
605 return 0;
606 for(i = len - 1; i != 0; --i) {
607 c[i] = utf8encodebyte(u, 0);
608 u >>= 6;
609 }
610 c[0] = utf8encodebyte(u, len);
611 return len;
612 }
613
614 char
615 utf8encodebyte(long u, size_t i) {
616 return utfbyte[i] | (u & ~utfmask[i]);
617 }
618
619 size_t
620 utf8len(char *c) {
621 return utf8decode(c, &(long){0}, UTF_SIZ);
622 }
623
624 size_t
625 utf8validate(long *u, size_t i) {
626 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
627 *u = UTF_INVALID;
628 for(i = 1; *u > utfmax[i]; ++i)
629 ;
630 return i;
631 }
632
633 static void
634 selinit(void) {
635 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
636 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
637 sel.mode = 0;
638 sel.ob.x = -1;
639 sel.clip = NULL;
640 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
641 if(sel.xtarget == None)
642 sel.xtarget = XA_STRING;
643 }
644
645 static int
646 x2col(int x) {
647 x -= borderpx;
648 x /= xw.cw;
649
650 return LIMIT(x, 0, term.col-1);
651 }
652
653 static int
654 y2row(int y) {
655 y -= borderpx;
656 y /= xw.ch;
657
658 return LIMIT(y, 0, term.row-1);
659 }
660
661 static int tlinelen(int y) {
662 int i = term.col;
663
664 while (i > 0 && term.line[y][i - 1].c[0] == ' ')
665 --i;
666
667 return i;
668 }
669
670 static void
671 selnormalize(void) {
672 int i;
673
674 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
675 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
676 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
677 } else {
678 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
679 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
680 }
681 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
682 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
683
684 /* expand selection over line breaks */
685 if (sel.type == SEL_RECTANGULAR)
686 return;
687 i = tlinelen(sel.nb.y);
688 if (i < sel.nb.x)
689 sel.nb.x = i;
690 if (tlinelen(sel.ne.y) <= sel.ne.x)
691 sel.ne.x = term.col - 1;
692 }
693
694 static inline bool
695 selected(int x, int y) {
696 if(sel.type == SEL_RECTANGULAR)
697 return BETWEEN(y, sel.nb.y, sel.ne.y)
698 && BETWEEN(x, sel.nb.x, sel.ne.x);
699
700 return BETWEEN(y, sel.nb.y, sel.ne.y)
701 && (y != sel.nb.y || x >= sel.nb.x)
702 && (y != sel.ne.y || x <= sel.ne.x);
703 }
704
705 void
706 selsnap(int mode, int *x, int *y, int direction) {
707 int newx, newy, xt, yt;
708 Glyph *gp;
709
710 switch(mode) {
711 case SNAP_WORD:
712 /*
713 * Snap around if the word wraps around at the end or
714 * beginning of a line.
715 */
716 for(;;) {
717 newx = *x + direction;
718 newy = *y;
719 if(!BETWEEN(newx, 0, term.col - 1)) {
720 newy += direction;
721 newx = (newx + term.col) % term.col;
722 if (!BETWEEN(newy, 0, term.row - 1))
723 break;
724
725 if(direction > 0)
726 yt = *y, xt = *x;
727 else
728 yt = newy, xt = newx;
729 if(!(term.line[yt][xt].mode & ATTR_WRAP))
730 break;
731 }
732
733 if (newx >= tlinelen(newy))
734 break;
735
736 gp = &term.line[newy][newx];
737 if (!(gp->mode & ATTR_WDUMMY) && strchr(worddelimiters, gp->c[0]))
738 break;
739
740 *x = newx;
741 *y = newy;
742 }
743 break;
744 case SNAP_LINE:
745 /*
746 * Snap around if the the previous line or the current one
747 * has set ATTR_WRAP at its end. Then the whole next or
748 * previous line will be selected.
749 */
750 *x = (direction < 0) ? 0 : term.col - 1;
751 if(direction < 0 && *y > 0) {
752 for(; *y > 0; *y += direction) {
753 if(!(term.line[*y-1][term.col-1].mode
754 & ATTR_WRAP)) {
755 break;
756 }
757 }
758 } else if(direction > 0 && *y < term.row-1) {
759 for(; *y < term.row; *y += direction) {
760 if(!(term.line[*y][term.col-1].mode
761 & ATTR_WRAP)) {
762 break;
763 }
764 }
765 }
766 break;
767 }
768 }
769
770 void
771 getbuttoninfo(XEvent *e) {
772 int type;
773 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
774
775 sel.alt = IS_SET(MODE_ALTSCREEN);
776
777 sel.oe.x = x2col(e->xbutton.x);
778 sel.oe.y = y2row(e->xbutton.y);
779
780 if(sel.ob.y < sel.oe.y
781 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
782 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
783 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
784 } else {
785 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
786 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
787 }
788 selnormalize();
789
790 sel.type = SEL_REGULAR;
791 for(type = 1; type < LEN(selmasks); ++type) {
792 if(match(selmasks[type], state)) {
793 sel.type = type;
794 break;
795 }
796 }
797 }
798
799 void
800 mousereport(XEvent *e) {
801 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
802 button = e->xbutton.button, state = e->xbutton.state,
803 len;
804 char buf[40];
805 static int ox, oy;
806
807 /* from urxvt */
808 if(e->xbutton.type == MotionNotify) {
809 if(x == ox && y == oy)
810 return;
811 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
812 return;
813 /* MOUSE_MOTION: no reporting if no button is pressed */
814 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
815 return;
816
817 button = oldbutton + 32;
818 ox = x;
819 oy = y;
820 } else {
821 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
822 button = 3;
823 } else {
824 button -= Button1;
825 if(button >= 3)
826 button += 64 - 3;
827 }
828 if(e->xbutton.type == ButtonPress) {
829 oldbutton = button;
830 ox = x;
831 oy = y;
832 } else if(e->xbutton.type == ButtonRelease) {
833 oldbutton = 3;
834 /* MODE_MOUSEX10: no button release reporting */
835 if(IS_SET(MODE_MOUSEX10))
836 return;
837 if (button == 64 || button == 65)
838 return;
839 }
840 }
841
842 if(!IS_SET(MODE_MOUSEX10)) {
843 button += (state & ShiftMask ? 4 : 0)
844 + (state & Mod4Mask ? 8 : 0)
845 + (state & ControlMask ? 16 : 0);
846 }
847
848 len = 0;
849 if(IS_SET(MODE_MOUSESGR)) {
850 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
851 button, x+1, y+1,
852 e->xbutton.type == ButtonRelease ? 'm' : 'M');
853 } else if(x < 223 && y < 223) {
854 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
855 32+button, 32+x+1, 32+y+1);
856 } else {
857 return;
858 }
859
860 ttywrite(buf, len);
861 }
862
863 void
864 bpress(XEvent *e) {
865 struct timespec now;
866 Mousekey *mk;
867
868 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
869 mousereport(e);
870 return;
871 }
872
873 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
874 if(e->xbutton.button == mk->b
875 && match(mk->mask, e->xbutton.state)) {
876 ttysend(mk->s, strlen(mk->s));
877 return;
878 }
879 }
880
881 if(e->xbutton.button == Button1) {
882 clock_gettime(CLOCK_MONOTONIC, &now);
883
884 /* Clear previous selection, logically and visually. */
885 selclear(NULL);
886 sel.mode = 1;
887 sel.type = SEL_REGULAR;
888 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
889 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
890
891 /*
892 * If the user clicks below predefined timeouts specific
893 * snapping behaviour is exposed.
894 */
895 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
896 sel.snap = SNAP_LINE;
897 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
898 sel.snap = SNAP_WORD;
899 } else {
900 sel.snap = 0;
901 }
902 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
903 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
904 selnormalize();
905
906 /*
907 * Draw selection, unless it's regular and we don't want to
908 * make clicks visible
909 */
910 if(sel.snap != 0) {
911 sel.mode++;
912 tsetdirt(sel.nb.y, sel.ne.y);
913 }
914 sel.tclick2 = sel.tclick1;
915 sel.tclick1 = now;
916 }
917 }
918
919 char *
920 getsel(void) {
921 char *str, *ptr;
922 int y, bufsize, size, lastx, linelen;
923 Glyph *gp, *last;
924
925 if(sel.ob.x == -1)
926 return NULL;
927
928 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
929 ptr = str = xmalloc(bufsize);
930
931 /* append every set & selected glyph to the selection */
932 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
933 linelen = tlinelen(y);
934
935 if(sel.type == SEL_RECTANGULAR) {
936 gp = &term.line[y][sel.nb.x];
937 lastx = sel.ne.x;
938 } else {
939 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
940 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
941 }
942 last = &term.line[y][MIN(lastx, linelen-1)];
943
944 for( ; gp <= last; ++gp) {
945 if(gp->mode & ATTR_WDUMMY)
946 continue;
947
948 size = utf8len(gp->c);
949 memcpy(ptr, gp->c, size);
950 ptr += size;
951 }
952
953 /*
954 * Copy and pasting of line endings is inconsistent
955 * in the inconsistent terminal and GUI world.
956 * The best solution seems like to produce '\n' when
957 * something is copied from st and convert '\n' to
958 * '\r', when something to be pasted is received by
959 * st.
960 * FIXME: Fix the computer world.
961 */
962 if(sel.ne.y > y || lastx >= linelen)
963 *ptr++ = '\n';
964 }
965 *ptr = 0;
966 return str;
967 }
968
969 void
970 selcopy(void) {
971 xsetsel(getsel());
972 }
973
974 void
975 selnotify(XEvent *e) {
976 ulong nitems, ofs, rem;
977 int format;
978 uchar *data, *last, *repl;
979 Atom type;
980
981 ofs = 0;
982 do {
983 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
984 False, AnyPropertyType, &type, &format,
985 &nitems, &rem, &data)) {
986 fprintf(stderr, "Clipboard allocation failed\n");
987 return;
988 }
989
990 /*
991 * As seen in getsel:
992 * Line endings are inconsistent in the terminal and GUI world
993 * copy and pasting. When receiving some selection data,
994 * replace all '\n' with '\r'.
995 * FIXME: Fix the computer world.
996 */
997 repl = data;
998 last = data + nitems * format / 8;
999 while((repl = memchr(repl, '\n', last - repl))) {
1000 *repl++ = '\r';
1001 }
1002
1003 if(IS_SET(MODE_BRCKTPASTE))
1004 ttywrite("\033[200~", 6);
1005 ttysend((char *)data, nitems * format / 8);
1006 if(IS_SET(MODE_BRCKTPASTE))
1007 ttywrite("\033[201~", 6);
1008 XFree(data);
1009 /* number of 32-bit chunks returned */
1010 ofs += nitems * format / 32;
1011 } while(rem > 0);
1012 }
1013
1014 void
1015 selpaste(const Arg *dummy) {
1016 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1017 xw.win, CurrentTime);
1018 }
1019
1020 void
1021 clippaste(const Arg *dummy) {
1022 Atom clipboard;
1023
1024 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1025 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1026 xw.win, CurrentTime);
1027 }
1028
1029 void
1030 selclear(XEvent *e) {
1031 if(sel.ob.x == -1)
1032 return;
1033 sel.ob.x = -1;
1034 tsetdirt(sel.nb.y, sel.ne.y);
1035 }
1036
1037 void
1038 selrequest(XEvent *e) {
1039 XSelectionRequestEvent *xsre;
1040 XSelectionEvent xev;
1041 Atom xa_targets, string;
1042
1043 xsre = (XSelectionRequestEvent *) e;
1044 xev.type = SelectionNotify;
1045 xev.requestor = xsre->requestor;
1046 xev.selection = xsre->selection;
1047 xev.target = xsre->target;
1048 xev.time = xsre->time;
1049 /* reject */
1050 xev.property = None;
1051
1052 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1053 if(xsre->target == xa_targets) {
1054 /* respond with the supported type */
1055 string = sel.xtarget;
1056 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1057 XA_ATOM, 32, PropModeReplace,
1058 (uchar *) &string, 1);
1059 xev.property = xsre->property;
1060 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1061 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1062 xsre->target, 8, PropModeReplace,
1063 (uchar *) sel.clip, strlen(sel.clip));
1064 xev.property = xsre->property;
1065 }
1066
1067 /* all done, send a notification to the listener */
1068 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1069 fprintf(stderr, "Error sending SelectionNotify event\n");
1070 }
1071
1072 void
1073 xsetsel(char *str) {
1074 /* register the selection for both the clipboard and the primary */
1075 Atom clipboard;
1076
1077 free(sel.clip);
1078 sel.clip = str;
1079
1080 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1081
1082 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1083 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1084 }
1085
1086 void
1087 brelease(XEvent *e) {
1088 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1089 mousereport(e);
1090 return;
1091 }
1092
1093 if(e->xbutton.button == Button2) {
1094 selpaste(NULL);
1095 } else if(e->xbutton.button == Button1) {
1096 if(sel.mode < 2) {
1097 selclear(NULL);
1098 } else {
1099 getbuttoninfo(e);
1100 selcopy();
1101 }
1102 sel.mode = 0;
1103 tsetdirt(sel.nb.y, sel.ne.y);
1104 }
1105 }
1106
1107 void
1108 bmotion(XEvent *e) {
1109 int oldey, oldex, oldsby, oldsey;
1110
1111 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1112 mousereport(e);
1113 return;
1114 }
1115
1116 if(!sel.mode)
1117 return;
1118
1119 sel.mode++;
1120 oldey = sel.oe.y;
1121 oldex = sel.oe.x;
1122 oldsby = sel.nb.y;
1123 oldsey = sel.ne.y;
1124 getbuttoninfo(e);
1125
1126 if(oldey != sel.oe.y || oldex != sel.oe.x)
1127 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1128 }
1129
1130 void
1131 die(const char *errstr, ...) {
1132 va_list ap;
1133
1134 va_start(ap, errstr);
1135 vfprintf(stderr, errstr, ap);
1136 va_end(ap);
1137 exit(EXIT_FAILURE);
1138 }
1139
1140 void
1141 execsh(void) {
1142 char **args;
1143 char *envshell = getenv("SHELL");
1144 const struct passwd *pass = getpwuid(getuid());
1145 char buf[sizeof(long) * 8 + 1];
1146
1147 unsetenv("COLUMNS");
1148 unsetenv("LINES");
1149 unsetenv("TERMCAP");
1150
1151 if(pass) {
1152 setenv("LOGNAME", pass->pw_name, 1);
1153 setenv("USER", pass->pw_name, 1);
1154 setenv("SHELL", pass->pw_shell, 0);
1155 setenv("HOME", pass->pw_dir, 0);
1156 }
1157
1158 snprintf(buf, sizeof(buf), "%lu", xw.win);
1159 setenv("WINDOWID", buf, 1);
1160
1161 signal(SIGCHLD, SIG_DFL);
1162 signal(SIGHUP, SIG_DFL);
1163 signal(SIGINT, SIG_DFL);
1164 signal(SIGQUIT, SIG_DFL);
1165 signal(SIGTERM, SIG_DFL);
1166 signal(SIGALRM, SIG_DFL);
1167
1168 DEFAULT(envshell, shell);
1169 setenv("TERM", termname, 1);
1170 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1171 execvp(args[0], args);
1172 exit(EXIT_FAILURE);
1173 }
1174
1175 void
1176 sigchld(int a) {
1177 int stat, ret;
1178
1179 if(waitpid(pid, &stat, 0) < 0)
1180 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1181
1182 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1183 if (ret != EXIT_SUCCESS)
1184 die("child finished with error '%d'\n", stat);
1185 exit(EXIT_SUCCESS);
1186 }
1187
1188 void
1189 ttynew(void) {
1190 int m, s;
1191 struct winsize w = {term.row, term.col, 0, 0};
1192
1193 /* seems to work fine on linux, openbsd and freebsd */
1194 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1195 die("openpty failed: %s\n", strerror(errno));
1196
1197 switch(pid = fork()) {
1198 case -1:
1199 die("fork failed\n");
1200 break;
1201 case 0:
1202 setsid(); /* create a new process group */
1203 dup2(s, STDIN_FILENO);
1204 dup2(s, STDOUT_FILENO);
1205 dup2(s, STDERR_FILENO);
1206 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1207 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1208 close(s);
1209 close(m);
1210 execsh();
1211 break;
1212 default:
1213 close(s);
1214 cmdfd = m;
1215 signal(SIGCHLD, sigchld);
1216 if(opt_io) {
1217 term.mode |= MODE_PRINT;
1218 iofd = (!strcmp(opt_io, "-")) ?
1219 STDOUT_FILENO :
1220 open(opt_io, O_WRONLY | O_CREAT, 0666);
1221 if(iofd < 0) {
1222 fprintf(stderr, "Error opening %s:%s\n",
1223 opt_io, strerror(errno));
1224 }
1225 }
1226 break;
1227 }
1228 }
1229
1230 void
1231 ttyread(void) {
1232 static char buf[BUFSIZ];
1233 static int buflen = 0;
1234 char *ptr;
1235 char s[UTF_SIZ];
1236 int charsize; /* size of utf8 char in bytes */
1237 long unicodep;
1238 int ret;
1239
1240 /* append read bytes to unprocessed bytes */
1241 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1242 die("Couldn't read from shell: %s\n", strerror(errno));
1243
1244 /* process every complete utf8 char */
1245 buflen += ret;
1246 ptr = buf;
1247 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1248 utf8encode(unicodep, s, UTF_SIZ);
1249 tputc(s, charsize);
1250 ptr += charsize;
1251 buflen -= charsize;
1252 }
1253
1254 /* keep any uncomplete utf8 char for the next call */
1255 memmove(buf, ptr, buflen);
1256 }
1257
1258 void
1259 ttywrite(const char *s, size_t n) {
1260 if(xwrite(cmdfd, s, n) == -1)
1261 die("write error on tty: %s\n", strerror(errno));
1262 }
1263
1264 void
1265 ttysend(char *s, size_t n) {
1266 ttywrite(s, n);
1267 if(IS_SET(MODE_ECHO))
1268 techo(s, n);
1269 }
1270
1271 void
1272 ttyresize(void) {
1273 struct winsize w;
1274
1275 w.ws_row = term.row;
1276 w.ws_col = term.col;
1277 w.ws_xpixel = xw.tw;
1278 w.ws_ypixel = xw.th;
1279 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1280 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1281 }
1282
1283 int
1284 tattrset(int attr) {
1285 int i, j;
1286
1287 for(i = 0; i < term.row-1; i++) {
1288 for(j = 0; j < term.col-1; j++) {
1289 if(term.line[i][j].mode & attr)
1290 return 1;
1291 }
1292 }
1293
1294 return 0;
1295 }
1296
1297 void
1298 tsetdirt(int top, int bot) {
1299 int i;
1300
1301 LIMIT(top, 0, term.row-1);
1302 LIMIT(bot, 0, term.row-1);
1303
1304 for(i = top; i <= bot; i++)
1305 term.dirty[i] = 1;
1306 }
1307
1308 void
1309 tsetdirtattr(int attr) {
1310 int i, j;
1311
1312 for(i = 0; i < term.row-1; i++) {
1313 for(j = 0; j < term.col-1; j++) {
1314 if(term.line[i][j].mode & attr) {
1315 tsetdirt(i, i);
1316 break;
1317 }
1318 }
1319 }
1320 }
1321
1322 void
1323 tfulldirt(void) {
1324 tsetdirt(0, term.row-1);
1325 }
1326
1327 void
1328 tcursor(int mode) {
1329 static TCursor c[2];
1330 bool alt = IS_SET(MODE_ALTSCREEN);
1331
1332 if(mode == CURSOR_SAVE) {
1333 c[alt] = term.c;
1334 } else if(mode == CURSOR_LOAD) {
1335 term.c = c[alt];
1336 tmoveto(c[alt].x, c[alt].y);
1337 }
1338 }
1339
1340 void
1341 treset(void) {
1342 uint i;
1343
1344 term.c = (TCursor){{
1345 .mode = ATTR_NULL,
1346 .fg = defaultfg,
1347 .bg = defaultbg
1348 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1349
1350 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1351 for(i = tabspaces; i < term.col; i += tabspaces)
1352 term.tabs[i] = 1;
1353 term.top = 0;
1354 term.bot = term.row - 1;
1355 term.mode = MODE_WRAP;
1356 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1357 term.charset = 0;
1358
1359 for(i = 0; i < 2; i++) {
1360 tmoveto(0, 0);
1361 tcursor(CURSOR_SAVE);
1362 tclearregion(0, 0, term.col-1, term.row-1);
1363 tswapscreen();
1364 }
1365 }
1366
1367 void
1368 tnew(int col, int row) {
1369 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1370 tresize(col, row);
1371 term.numlock = 1;
1372
1373 treset();
1374 }
1375
1376 void
1377 tswapscreen(void) {
1378 Line *tmp = term.line;
1379
1380 term.line = term.alt;
1381 term.alt = tmp;
1382 term.mode ^= MODE_ALTSCREEN;
1383 tfulldirt();
1384 }
1385
1386 void
1387 tscrolldown(int orig, int n) {
1388 int i;
1389 Line temp;
1390
1391 LIMIT(n, 0, term.bot-orig+1);
1392
1393 tsetdirt(orig, term.bot-n);
1394 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1395
1396 for(i = term.bot; i >= orig+n; i--) {
1397 temp = term.line[i];
1398 term.line[i] = term.line[i-n];
1399 term.line[i-n] = temp;
1400 }
1401
1402 selscroll(orig, n);
1403 }
1404
1405 void
1406 tscrollup(int orig, int n) {
1407 int i;
1408 Line temp;
1409
1410 LIMIT(n, 0, term.bot-orig+1);
1411
1412 tclearregion(0, orig, term.col-1, orig+n-1);
1413 tsetdirt(orig+n, term.bot);
1414
1415 for(i = orig; i <= term.bot-n; i++) {
1416 temp = term.line[i];
1417 term.line[i] = term.line[i+n];
1418 term.line[i+n] = temp;
1419 }
1420
1421 selscroll(orig, -n);
1422 }
1423
1424 void
1425 selscroll(int orig, int n) {
1426 if(sel.ob.x == -1)
1427 return;
1428
1429 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1430 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1431 selclear(NULL);
1432 return;
1433 }
1434 if(sel.type == SEL_RECTANGULAR) {
1435 if(sel.ob.y < term.top)
1436 sel.ob.y = term.top;
1437 if(sel.oe.y > term.bot)
1438 sel.oe.y = term.bot;
1439 } else {
1440 if(sel.ob.y < term.top) {
1441 sel.ob.y = term.top;
1442 sel.ob.x = 0;
1443 }
1444 if(sel.oe.y > term.bot) {
1445 sel.oe.y = term.bot;
1446 sel.oe.x = term.col;
1447 }
1448 }
1449 selnormalize();
1450 }
1451 }
1452
1453 void
1454 tnewline(int first_col) {
1455 int y = term.c.y;
1456
1457 if(y == term.bot) {
1458 tscrollup(term.top, 1);
1459 } else {
1460 y++;
1461 }
1462 tmoveto(first_col ? 0 : term.c.x, y);
1463 }
1464
1465 void
1466 csiparse(void) {
1467 char *p = csiescseq.buf, *np;
1468 long int v;
1469
1470 csiescseq.narg = 0;
1471 if(*p == '?') {
1472 csiescseq.priv = 1;
1473 p++;
1474 }
1475
1476 csiescseq.buf[csiescseq.len] = '\0';
1477 while(p < csiescseq.buf+csiescseq.len) {
1478 np = NULL;
1479 v = strtol(p, &np, 10);
1480 if(np == p)
1481 v = 0;
1482 if(v == LONG_MAX || v == LONG_MIN)
1483 v = -1;
1484 csiescseq.arg[csiescseq.narg++] = v;
1485 p = np;
1486 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1487 break;
1488 p++;
1489 }
1490 csiescseq.mode = *p;
1491 }
1492
1493 /* for absolute user moves, when decom is set */
1494 void
1495 tmoveato(int x, int y) {
1496 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1497 }
1498
1499 void
1500 tmoveto(int x, int y) {
1501 int miny, maxy;
1502
1503 if(term.c.state & CURSOR_ORIGIN) {
1504 miny = term.top;
1505 maxy = term.bot;
1506 } else {
1507 miny = 0;
1508 maxy = term.row - 1;
1509 }
1510 LIMIT(x, 0, term.col-1);
1511 LIMIT(y, miny, maxy);
1512 term.c.state &= ~CURSOR_WRAPNEXT;
1513 term.c.x = x;
1514 term.c.y = y;
1515 }
1516
1517 void
1518 tsetchar(char *c, Glyph *attr, int x, int y) {
1519 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1520 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1521 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1522 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1523 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1524 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1525 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1526 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1527 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1528 };
1529
1530 /*
1531 * The table is proudly stolen from rxvt.
1532 */
1533 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1534 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1535 c = vt100_0[c[0] - 0x41];
1536 }
1537 }
1538
1539 if(term.line[y][x].mode & ATTR_WIDE) {
1540 if(x+1 < term.col) {
1541 term.line[y][x+1].c[0] = ' ';
1542 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1543 }
1544 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1545 term.line[y][x-1].c[0] = ' ';
1546 term.line[y][x-1].mode &= ~ATTR_WIDE;
1547 }
1548
1549 term.dirty[y] = 1;
1550 term.line[y][x] = *attr;
1551 memcpy(term.line[y][x].c, c, UTF_SIZ);
1552 }
1553
1554 void
1555 tclearregion(int x1, int y1, int x2, int y2) {
1556 int x, y, temp;
1557 Glyph *gp;
1558
1559 if(x1 > x2)
1560 temp = x1, x1 = x2, x2 = temp;
1561 if(y1 > y2)
1562 temp = y1, y1 = y2, y2 = temp;
1563
1564 LIMIT(x1, 0, term.col-1);
1565 LIMIT(x2, 0, term.col-1);
1566 LIMIT(y1, 0, term.row-1);
1567 LIMIT(y2, 0, term.row-1);
1568
1569 for(y = y1; y <= y2; y++) {
1570 term.dirty[y] = 1;
1571 for(x = x1; x <= x2; x++) {
1572 gp = &term.line[y][x];
1573 if(selected(x, y))
1574 selclear(NULL);
1575 gp->fg = term.c.attr.fg;
1576 gp->bg = term.c.attr.bg;
1577 gp->mode = 0;
1578 memcpy(gp->c, " ", 2);
1579 }
1580 }
1581 }
1582
1583 void
1584 tdeletechar(int n) {
1585 int dst, src, size;
1586 Glyph *line;
1587
1588 LIMIT(n, 0, term.col - term.c.x);
1589
1590 dst = term.c.x;
1591 src = term.c.x + n;
1592 size = term.col - src;
1593 line = term.line[term.c.y];
1594
1595 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1596 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1597 }
1598
1599 void
1600 tinsertblank(int n) {
1601 int dst, src, size;
1602 Glyph *line;
1603
1604 LIMIT(n, 0, term.col - term.c.x);
1605
1606 dst = term.c.x + n;
1607 src = term.c.x;
1608 size = term.col - dst;
1609 line = term.line[term.c.y];
1610
1611 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1612 tclearregion(src, term.c.y, dst - 1, term.c.y);
1613 }
1614
1615 void
1616 tinsertblankline(int n) {
1617 if(BETWEEN(term.c.y, term.top, term.bot))
1618 tscrolldown(term.c.y, n);
1619 }
1620
1621 void
1622 tdeleteline(int n) {
1623 if(BETWEEN(term.c.y, term.top, term.bot))
1624 tscrollup(term.c.y, n);
1625 }
1626
1627 int32_t
1628 tdefcolor(int *attr, int *npar, int l) {
1629 int32_t idx = -1;
1630 uint r, g, b;
1631
1632 switch (attr[*npar + 1]) {
1633 case 2: /* direct color in RGB space */
1634 if (*npar + 4 >= l) {
1635 fprintf(stderr,
1636 "erresc(38): Incorrect number of parameters (%d)\n",
1637 *npar);
1638 break;
1639 }
1640 r = attr[*npar + 2];
1641 g = attr[*npar + 3];
1642 b = attr[*npar + 4];
1643 *npar += 4;
1644 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1645 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1646 r, g, b);
1647 else
1648 idx = TRUECOLOR(r, g, b);
1649 break;
1650 case 5: /* indexed color */
1651 if (*npar + 2 >= l) {
1652 fprintf(stderr,
1653 "erresc(38): Incorrect number of parameters (%d)\n",
1654 *npar);
1655 break;
1656 }
1657 *npar += 2;
1658 if(!BETWEEN(attr[*npar], 0, 255))
1659 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1660 else
1661 idx = attr[*npar];
1662 break;
1663 case 0: /* implemented defined (only foreground) */
1664 case 1: /* transparent */
1665 case 3: /* direct color in CMY space */
1666 case 4: /* direct color in CMYK space */
1667 default:
1668 fprintf(stderr,
1669 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1670 break;
1671 }
1672
1673 return idx;
1674 }
1675
1676 void
1677 tsetattr(int *attr, int l) {
1678 int i;
1679 int32_t idx;
1680
1681 for(i = 0; i < l; i++) {
1682 switch(attr[i]) {
1683 case 0:
1684 term.c.attr.mode &= ~(
1685 ATTR_BOLD |
1686 ATTR_FAINT |
1687 ATTR_ITALIC |
1688 ATTR_UNDERLINE |
1689 ATTR_BLINK |
1690 ATTR_REVERSE |
1691 ATTR_INVISIBLE |
1692 ATTR_STRUCK );
1693 term.c.attr.fg = defaultfg;
1694 term.c.attr.bg = defaultbg;
1695 break;
1696 case 1:
1697 term.c.attr.mode |= ATTR_BOLD;
1698 break;
1699 case 2:
1700 term.c.attr.mode |= ATTR_FAINT;
1701 break;
1702 case 3:
1703 term.c.attr.mode |= ATTR_ITALIC;
1704 break;
1705 case 4:
1706 term.c.attr.mode |= ATTR_UNDERLINE;
1707 break;
1708 case 5: /* slow blink */
1709 /* FALLTHROUGH */
1710 case 6: /* rapid blink */
1711 term.c.attr.mode |= ATTR_BLINK;
1712 break;
1713 case 7:
1714 term.c.attr.mode |= ATTR_REVERSE;
1715 break;
1716 case 8:
1717 term.c.attr.mode |= ATTR_INVISIBLE;
1718 break;
1719 case 9:
1720 term.c.attr.mode |= ATTR_STRUCK;
1721 break;
1722 case 22:
1723 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1724 break;
1725 case 23:
1726 term.c.attr.mode &= ~ATTR_ITALIC;
1727 break;
1728 case 24:
1729 term.c.attr.mode &= ~ATTR_UNDERLINE;
1730 break;
1731 case 25:
1732 term.c.attr.mode &= ~ATTR_BLINK;
1733 break;
1734 case 27:
1735 term.c.attr.mode &= ~ATTR_REVERSE;
1736 break;
1737 case 28:
1738 term.c.attr.mode &= ~ATTR_INVISIBLE;
1739 break;
1740 case 29:
1741 term.c.attr.mode &= ~ATTR_STRUCK;
1742 break;
1743 case 38:
1744 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1745 term.c.attr.fg = idx;
1746 break;
1747 case 39:
1748 term.c.attr.fg = defaultfg;
1749 break;
1750 case 48:
1751 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1752 term.c.attr.bg = idx;
1753 break;
1754 case 49:
1755 term.c.attr.bg = defaultbg;
1756 break;
1757 default:
1758 if(BETWEEN(attr[i], 30, 37)) {
1759 term.c.attr.fg = attr[i] - 30;
1760 } else if(BETWEEN(attr[i], 40, 47)) {
1761 term.c.attr.bg = attr[i] - 40;
1762 } else if(BETWEEN(attr[i], 90, 97)) {
1763 term.c.attr.fg = attr[i] - 90 + 8;
1764 } else if(BETWEEN(attr[i], 100, 107)) {
1765 term.c.attr.bg = attr[i] - 100 + 8;
1766 } else {
1767 fprintf(stderr,
1768 "erresc(default): gfx attr %d unknown\n",
1769 attr[i]), csidump();
1770 }
1771 break;
1772 }
1773 }
1774 }
1775
1776 void
1777 tsetscroll(int t, int b) {
1778 int temp;
1779
1780 LIMIT(t, 0, term.row-1);
1781 LIMIT(b, 0, term.row-1);
1782 if(t > b) {
1783 temp = t;
1784 t = b;
1785 b = temp;
1786 }
1787 term.top = t;
1788 term.bot = b;
1789 }
1790
1791 void
1792 tsetmode(bool priv, bool set, int *args, int narg) {
1793 int *lim, mode;
1794 bool alt;
1795
1796 for(lim = args + narg; args < lim; ++args) {
1797 if(priv) {
1798 switch(*args) {
1799 case 1: /* DECCKM -- Cursor key */
1800 MODBIT(term.mode, set, MODE_APPCURSOR);
1801 break;
1802 case 5: /* DECSCNM -- Reverse video */
1803 mode = term.mode;
1804 MODBIT(term.mode, set, MODE_REVERSE);
1805 if(mode != term.mode)
1806 redraw(REDRAW_TIMEOUT);
1807 break;
1808 case 6: /* DECOM -- Origin */
1809 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1810 tmoveato(0, 0);
1811 break;
1812 case 7: /* DECAWM -- Auto wrap */
1813 MODBIT(term.mode, set, MODE_WRAP);
1814 break;
1815 case 0: /* Error (IGNORED) */
1816 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1817 case 3: /* DECCOLM -- Column (IGNORED) */
1818 case 4: /* DECSCLM -- Scroll (IGNORED) */
1819 case 8: /* DECARM -- Auto repeat (IGNORED) */
1820 case 18: /* DECPFF -- Printer feed (IGNORED) */
1821 case 19: /* DECPEX -- Printer extent (IGNORED) */
1822 case 42: /* DECNRCM -- National characters (IGNORED) */
1823 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1824 break;
1825 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1826 MODBIT(term.mode, !set, MODE_HIDE);
1827 break;
1828 case 9: /* X10 mouse compatibility mode */
1829 xsetpointermotion(0);
1830 MODBIT(term.mode, 0, MODE_MOUSE);
1831 MODBIT(term.mode, set, MODE_MOUSEX10);
1832 break;
1833 case 1000: /* 1000: report button press */
1834 xsetpointermotion(0);
1835 MODBIT(term.mode, 0, MODE_MOUSE);
1836 MODBIT(term.mode, set, MODE_MOUSEBTN);
1837 break;
1838 case 1002: /* 1002: report motion on button press */
1839 xsetpointermotion(0);
1840 MODBIT(term.mode, 0, MODE_MOUSE);
1841 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1842 break;
1843 case 1003: /* 1003: enable all mouse motions */
1844 xsetpointermotion(set);
1845 MODBIT(term.mode, 0, MODE_MOUSE);
1846 MODBIT(term.mode, set, MODE_MOUSEMANY);
1847 break;
1848 case 1004: /* 1004: send focus events to tty */
1849 MODBIT(term.mode, set, MODE_FOCUS);
1850 break;
1851 case 1006: /* 1006: extended reporting mode */
1852 MODBIT(term.mode, set, MODE_MOUSESGR);
1853 break;
1854 case 1034:
1855 MODBIT(term.mode, set, MODE_8BIT);
1856 break;
1857 case 1049: /* swap screen & set/restore cursor as xterm */
1858 if (!allowaltscreen)
1859 break;
1860 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1861 /* FALLTHROUGH */
1862 case 47: /* swap screen */
1863 case 1047:
1864 if (!allowaltscreen)
1865 break;
1866 alt = IS_SET(MODE_ALTSCREEN);
1867 if(alt) {
1868 tclearregion(0, 0, term.col-1,
1869 term.row-1);
1870 }
1871 if(set ^ alt) /* set is always 1 or 0 */
1872 tswapscreen();
1873 if(*args != 1049)
1874 break;
1875 /* FALLTHROUGH */
1876 case 1048:
1877 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1878 break;
1879 case 2004: /* 2004: bracketed paste mode */
1880 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1881 break;
1882 /* Not implemented mouse modes. See comments there. */
1883 case 1001: /* mouse highlight mode; can hang the
1884 terminal by design when implemented. */
1885 case 1005: /* UTF-8 mouse mode; will confuse
1886 applications not supporting UTF-8
1887 and luit. */
1888 case 1015: /* urxvt mangled mouse mode; incompatible
1889 and can be mistaken for other control
1890 codes. */
1891 default:
1892 fprintf(stderr,
1893 "erresc: unknown private set/reset mode %d\n",
1894 *args);
1895 break;
1896 }
1897 } else {
1898 switch(*args) {
1899 case 0: /* Error (IGNORED) */
1900 break;
1901 case 2: /* KAM -- keyboard action */
1902 MODBIT(term.mode, set, MODE_KBDLOCK);
1903 break;
1904 case 4: /* IRM -- Insertion-replacement */
1905 MODBIT(term.mode, set, MODE_INSERT);
1906 break;
1907 case 12: /* SRM -- Send/Receive */
1908 MODBIT(term.mode, !set, MODE_ECHO);
1909 break;
1910 case 20: /* LNM -- Linefeed/new line */
1911 MODBIT(term.mode, set, MODE_CRLF);
1912 break;
1913 default:
1914 fprintf(stderr,
1915 "erresc: unknown set/reset mode %d\n",
1916 *args);
1917 break;
1918 }
1919 }
1920 }
1921 }
1922
1923 void
1924 csihandle(void) {
1925 char buf[40];
1926 int len;
1927
1928 switch(csiescseq.mode) {
1929 default:
1930 unknown:
1931 fprintf(stderr, "erresc: unknown csi ");
1932 csidump();
1933 /* die(""); */
1934 break;
1935 case '@': /* ICH -- Insert <n> blank char */
1936 DEFAULT(csiescseq.arg[0], 1);
1937 tinsertblank(csiescseq.arg[0]);
1938 break;
1939 case 'A': /* CUU -- Cursor <n> Up */
1940 DEFAULT(csiescseq.arg[0], 1);
1941 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1942 break;
1943 case 'B': /* CUD -- Cursor <n> Down */
1944 case 'e': /* VPR --Cursor <n> Down */
1945 DEFAULT(csiescseq.arg[0], 1);
1946 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1947 break;
1948 case 'i': /* MC -- Media Copy */
1949 switch(csiescseq.arg[0]) {
1950 case 0:
1951 tdump();
1952 break;
1953 case 1:
1954 tdumpline(term.c.y);
1955 break;
1956 case 2:
1957 tdumpsel();
1958 break;
1959 case 4:
1960 term.mode &= ~MODE_PRINT;
1961 break;
1962 case 5:
1963 term.mode |= MODE_PRINT;
1964 break;
1965 }
1966 break;
1967 case 'c': /* DA -- Device Attributes */
1968 if(csiescseq.arg[0] == 0)
1969 ttywrite(vtiden, sizeof(vtiden) - 1);
1970 break;
1971 case 'C': /* CUF -- Cursor <n> Forward */
1972 case 'a': /* HPR -- Cursor <n> Forward */
1973 DEFAULT(csiescseq.arg[0], 1);
1974 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1975 break;
1976 case 'D': /* CUB -- Cursor <n> Backward */
1977 DEFAULT(csiescseq.arg[0], 1);
1978 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1979 break;
1980 case 'E': /* CNL -- Cursor <n> Down and first col */
1981 DEFAULT(csiescseq.arg[0], 1);
1982 tmoveto(0, term.c.y+csiescseq.arg[0]);
1983 break;
1984 case 'F': /* CPL -- Cursor <n> Up and first col */
1985 DEFAULT(csiescseq.arg[0], 1);
1986 tmoveto(0, term.c.y-csiescseq.arg[0]);
1987 break;
1988 case 'g': /* TBC -- Tabulation clear */
1989 switch(csiescseq.arg[0]) {
1990 case 0: /* clear current tab stop */
1991 term.tabs[term.c.x] = 0;
1992 break;
1993 case 3: /* clear all the tabs */
1994 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1995 break;
1996 default:
1997 goto unknown;
1998 }
1999 break;
2000 case 'G': /* CHA -- Move to <col> */
2001 case '`': /* HPA */
2002 DEFAULT(csiescseq.arg[0], 1);
2003 tmoveto(csiescseq.arg[0]-1, term.c.y);
2004 break;
2005 case 'H': /* CUP -- Move to <row> <col> */
2006 case 'f': /* HVP */
2007 DEFAULT(csiescseq.arg[0], 1);
2008 DEFAULT(csiescseq.arg[1], 1);
2009 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2010 break;
2011 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2012 DEFAULT(csiescseq.arg[0], 1);
2013 tputtab(csiescseq.arg[0]);
2014 break;
2015 case 'J': /* ED -- Clear screen */
2016 selclear(NULL);
2017 switch(csiescseq.arg[0]) {
2018 case 0: /* below */
2019 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2020 if(term.c.y < term.row-1) {
2021 tclearregion(0, term.c.y+1, term.col-1,
2022 term.row-1);
2023 }
2024 break;
2025 case 1: /* above */
2026 if(term.c.y > 1)
2027 tclearregion(0, 0, term.col-1, term.c.y-1);
2028 tclearregion(0, term.c.y, term.c.x, term.c.y);
2029 break;
2030 case 2: /* all */
2031 tclearregion(0, 0, term.col-1, term.row-1);
2032 break;
2033 default:
2034 goto unknown;
2035 }
2036 break;
2037 case 'K': /* EL -- Clear line */
2038 switch(csiescseq.arg[0]) {
2039 case 0: /* right */
2040 tclearregion(term.c.x, term.c.y, term.col-1,
2041 term.c.y);
2042 break;
2043 case 1: /* left */
2044 tclearregion(0, term.c.y, term.c.x, term.c.y);
2045 break;
2046 case 2: /* all */
2047 tclearregion(0, term.c.y, term.col-1, term.c.y);
2048 break;
2049 }
2050 break;
2051 case 'S': /* SU -- Scroll <n> line up */
2052 DEFAULT(csiescseq.arg[0], 1);
2053 tscrollup(term.top, csiescseq.arg[0]);
2054 break;
2055 case 'T': /* SD -- Scroll <n> line down */
2056 DEFAULT(csiescseq.arg[0], 1);
2057 tscrolldown(term.top, csiescseq.arg[0]);
2058 break;
2059 case 'L': /* IL -- Insert <n> blank lines */
2060 DEFAULT(csiescseq.arg[0], 1);
2061 tinsertblankline(csiescseq.arg[0]);
2062 break;
2063 case 'l': /* RM -- Reset Mode */
2064 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2065 break;
2066 case 'M': /* DL -- Delete <n> lines */
2067 DEFAULT(csiescseq.arg[0], 1);
2068 tdeleteline(csiescseq.arg[0]);
2069 break;
2070 case 'X': /* ECH -- Erase <n> char */
2071 DEFAULT(csiescseq.arg[0], 1);
2072 tclearregion(term.c.x, term.c.y,
2073 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2074 break;
2075 case 'P': /* DCH -- Delete <n> char */
2076 DEFAULT(csiescseq.arg[0], 1);
2077 tdeletechar(csiescseq.arg[0]);
2078 break;
2079 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2080 DEFAULT(csiescseq.arg[0], 1);
2081 tputtab(-csiescseq.arg[0]);
2082 break;
2083 case 'd': /* VPA -- Move to <row> */
2084 DEFAULT(csiescseq.arg[0], 1);
2085 tmoveato(term.c.x, csiescseq.arg[0]-1);
2086 break;
2087 case 'h': /* SM -- Set terminal mode */
2088 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2089 break;
2090 case 'm': /* SGR -- Terminal attribute (color) */
2091 tsetattr(csiescseq.arg, csiescseq.narg);
2092 break;
2093 case 'n': /* DSR – Device Status Report (cursor position) */
2094 if (csiescseq.arg[0] == 6) {
2095 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2096 term.c.y+1, term.c.x+1);
2097 ttywrite(buf, len);
2098 }
2099 break;
2100 case 'r': /* DECSTBM -- Set Scrolling Region */
2101 if(csiescseq.priv) {
2102 goto unknown;
2103 } else {
2104 DEFAULT(csiescseq.arg[0], 1);
2105 DEFAULT(csiescseq.arg[1], term.row);
2106 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2107 tmoveato(0, 0);
2108 }
2109 break;
2110 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2111 tcursor(CURSOR_SAVE);
2112 break;
2113 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2114 tcursor(CURSOR_LOAD);
2115 break;
2116 }
2117 }
2118
2119 void
2120 csidump(void) {
2121 int i;
2122 uint c;
2123
2124 printf("ESC[");
2125 for(i = 0; i < csiescseq.len; i++) {
2126 c = csiescseq.buf[i] & 0xff;
2127 if(isprint(c)) {
2128 putchar(c);
2129 } else if(c == '\n') {
2130 printf("(\\n)");
2131 } else if(c == '\r') {
2132 printf("(\\r)");
2133 } else if(c == 0x1b) {
2134 printf("(\\e)");
2135 } else {
2136 printf("(%02x)", c);
2137 }
2138 }
2139 putchar('\n');
2140 }
2141
2142 void
2143 csireset(void) {
2144 memset(&csiescseq, 0, sizeof(csiescseq));
2145 }
2146
2147 void
2148 strhandle(void) {
2149 char *p = NULL;
2150 int j, narg, par;
2151
2152 term.esc &= ~(ESC_STR_END|ESC_STR);
2153 strparse();
2154 narg = strescseq.narg;
2155 par = atoi(strescseq.args[0]);
2156
2157 switch(strescseq.type) {
2158 case ']': /* OSC -- Operating System Command */
2159 switch(par) {
2160 case 0:
2161 case 1:
2162 case 2:
2163 if(narg > 1)
2164 xsettitle(strescseq.args[1]);
2165 return;
2166 case 4: /* color set */
2167 if(narg < 3)
2168 break;
2169 p = strescseq.args[2];
2170 /* FALLTHROUGH */
2171 case 104: /* color reset, here p = NULL */
2172 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2173 if(xsetcolorname(j, p)) {
2174 fprintf(stderr, "erresc: invalid color %s\n", p);
2175 } else {
2176 /*
2177 * TODO if defaultbg color is changed, borders
2178 * are dirty
2179 */
2180 redraw(0);
2181 }
2182 return;
2183 }
2184 break;
2185 case 'k': /* old title set compatibility */
2186 xsettitle(strescseq.args[0]);
2187 return;
2188 case 'P': /* DCS -- Device Control String */
2189 case '_': /* APC -- Application Program Command */
2190 case '^': /* PM -- Privacy Message */
2191 return;
2192 }
2193
2194 fprintf(stderr, "erresc: unknown str ");
2195 strdump();
2196 }
2197
2198 void
2199 strparse(void) {
2200 char *p = strescseq.buf;
2201
2202 strescseq.narg = 0;
2203 strescseq.buf[strescseq.len] = '\0';
2204 while(p && strescseq.narg < STR_ARG_SIZ)
2205 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2206 }
2207
2208 void
2209 strdump(void) {
2210 int i;
2211 uint c;
2212
2213 printf("ESC%c", strescseq.type);
2214 for(i = 0; i < strescseq.len; i++) {
2215 c = strescseq.buf[i] & 0xff;
2216 if(c == '\0') {
2217 return;
2218 } else if(isprint(c)) {
2219 putchar(c);
2220 } else if(c == '\n') {
2221 printf("(\\n)");
2222 } else if(c == '\r') {
2223 printf("(\\r)");
2224 } else if(c == 0x1b) {
2225 printf("(\\e)");
2226 } else {
2227 printf("(%02x)", c);
2228 }
2229 }
2230 printf("ESC\\\n");
2231 }
2232
2233 void
2234 strreset(void) {
2235 memset(&strescseq, 0, sizeof(strescseq));
2236 }
2237
2238 void
2239 tprinter(char *s, size_t len) {
2240 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2241 fprintf(stderr, "Error writing in %s:%s\n",
2242 opt_io, strerror(errno));
2243 close(iofd);
2244 iofd = -1;
2245 }
2246 }
2247
2248 void
2249 toggleprinter(const Arg *arg) {
2250 term.mode ^= MODE_PRINT;
2251 }
2252
2253 void
2254 printscreen(const Arg *arg) {
2255 tdump();
2256 }
2257
2258 void
2259 printsel(const Arg *arg) {
2260 tdumpsel();
2261 }
2262
2263 void
2264 tdumpsel(void) {
2265 char *ptr;
2266
2267 if((ptr = getsel())) {
2268 tprinter(ptr, strlen(ptr));
2269 free(ptr);
2270 }
2271 }
2272
2273 void
2274 tdumpline(int n) {
2275 Glyph *bp, *end;
2276
2277 bp = &term.line[n][0];
2278 end = &bp[MIN(tlinelen(n), term.col) - 1];
2279 if(bp != end || bp->c[0] != ' ') {
2280 for( ;bp <= end; ++bp)
2281 tprinter(bp->c, utf8len(bp->c));
2282 }
2283 tprinter("\n", 1);
2284 }
2285
2286 void
2287 tdump(void) {
2288 int i;
2289
2290 for(i = 0; i < term.row; ++i)
2291 tdumpline(i);
2292 }
2293
2294 void
2295 tputtab(int n) {
2296 uint x = term.c.x;
2297
2298 if(n > 0) {
2299 while(x < term.col && n--)
2300 for(++x; x < term.col && !term.tabs[x]; ++x)
2301 /* nothing */ ;
2302 } else if(n < 0) {
2303 while(x > 0 && n++)
2304 for(--x; x > 0 && !term.tabs[x]; --x)
2305 /* nothing */ ;
2306 }
2307 tmoveto(x, term.c.y);
2308 }
2309
2310 void
2311 techo(char *buf, int len) {
2312 for(; len > 0; buf++, len--) {
2313 char c = *buf;
2314
2315 if(ISCONTROL((uchar) c)) { /* control code */
2316 if(c & 0x80) {
2317 c &= 0x7f;
2318 tputc("^", 1);
2319 tputc("[", 1);
2320 } else if(c != '\n' && c != '\r' && c != '\t') {
2321 c ^= 0x40;
2322 tputc("^", 1);
2323 }
2324 tputc(&c, 1);
2325 } else {
2326 break;
2327 }
2328 }
2329 if(len)
2330 tputc(buf, len);
2331 }
2332
2333 void
2334 tdeftran(char ascii) {
2335 static char cs[] = "0B";
2336 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2337 char *p;
2338
2339 if((p = strchr(cs, ascii)) == NULL) {
2340 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2341 } else {
2342 term.trantbl[term.icharset] = vcs[p - cs];
2343 }
2344 }
2345
2346 void
2347 tstrsequence(uchar c) {
2348 if (c & 0x80) {
2349 switch (c) {
2350 case 0x90: /* DCS -- Device Control String */
2351 c = 'P';
2352 break;
2353 case 0x9f: /* APC -- Application Program Command */
2354 c = '_';
2355 break;
2356 case 0x9e: /* PM -- Privacy Message */
2357 c = '^';
2358 break;
2359 case 0x9d: /* OSC -- Operating System Command */
2360 c = ']';
2361 break;
2362 }
2363 }
2364 strreset();
2365 strescseq.type = c;
2366 term.esc |= ESC_STR;
2367 return;
2368 }
2369
2370 void
2371 tcontrolcode(uchar ascii) {
2372 static char question[UTF_SIZ] = "?";
2373
2374 switch(ascii) {
2375 case '\t': /* HT */
2376 tputtab(1);
2377 return;
2378 case '\b': /* BS */
2379 tmoveto(term.c.x-1, term.c.y);
2380 return;
2381 case '\r': /* CR */
2382 tmoveto(0, term.c.y);
2383 return;
2384 case '\f': /* LF */
2385 case '\v': /* VT */
2386 case '\n': /* LF */
2387 /* go to first col if the mode is set */
2388 tnewline(IS_SET(MODE_CRLF));
2389 return;
2390 case '\a': /* BEL */
2391 if(term.esc & ESC_STR_END) {
2392 /* backwards compatibility to xterm */
2393 strhandle();
2394 } else {
2395 if(!(xw.state & WIN_FOCUSED))
2396 xseturgency(1);
2397 if (bellvolume)
2398 XBell(xw.dpy, bellvolume);
2399 }
2400 break;
2401 case '\033': /* ESC */
2402 csireset();
2403 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2404 term.esc |= ESC_START;
2405 return;
2406 case '\016': /* SO */
2407 term.charset = 0;
2408 return;
2409 case '\017': /* SI */
2410 term.charset = 1;
2411 return;
2412 case '\032': /* SUB */
2413 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2414 case '\030': /* CAN */
2415 csireset();
2416 break;
2417 case '\005': /* ENQ (IGNORED) */
2418 case '\000': /* NUL (IGNORED) */
2419 case '\021': /* XON (IGNORED) */
2420 case '\023': /* XOFF (IGNORED) */
2421 case 0177: /* DEL (IGNORED) */
2422 return;
2423 case 0x84: /* TODO: IND */
2424 break;
2425 case 0x85: /* NEL -- Next line */
2426 tnewline(1); /* always go to first col */
2427 break;
2428 case 0x88: /* HTS -- Horizontal tab stop */
2429 term.tabs[term.c.x] = 1;
2430 break;
2431 case 0x8d: /* TODO: RI */
2432 case 0x8e: /* TODO: SS2 */
2433 case 0x8f: /* TODO: SS3 */
2434 case 0x98: /* TODO: SOS */
2435 break;
2436 case 0x9a: /* DECID -- Identify Terminal */
2437 ttywrite(vtiden, sizeof(vtiden) - 1);
2438 break;
2439 case 0x9b: /* TODO: CSI */
2440 case 0x9c: /* TODO: ST */
2441 break;
2442 case 0x90: /* DCS -- Device Control String */
2443 case 0x9f: /* APC -- Application Program Command */
2444 case 0x9e: /* PM -- Privacy Message */
2445 case 0x9d: /* OSC -- Operating System Command */
2446 tstrsequence(ascii);
2447 return;
2448 }
2449 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2450 term.esc &= ~(ESC_STR_END|ESC_STR);
2451 return;
2452 }
2453
2454 void
2455 tdectest(char c) {
2456 static char E[UTF_SIZ] = "E";
2457 int x, y;
2458
2459 if(c == '8') { /* DEC screen alignment test. */
2460 for(x = 0; x < term.col; ++x) {
2461 for(y = 0; y < term.row; ++y)
2462 tsetchar(E, &term.c.attr, x, y);
2463 }
2464 }
2465 }
2466
2467 void
2468 tputc(char *c, int len) {
2469 uchar ascii;
2470 bool control;
2471 long unicodep;
2472 int width;
2473 Glyph *gp;
2474
2475 if(len == 1) {
2476 width = 1;
2477 unicodep = ascii = *c;
2478 } else {
2479 utf8decode(c, &unicodep, UTF_SIZ);
2480 width = wcwidth(unicodep);
2481 control = ISCONTROLC1(unicodep);
2482 ascii = unicodep;
2483 }
2484
2485 if(IS_SET(MODE_PRINT))
2486 tprinter(c, len);
2487 control = ISCONTROL(unicodep);
2488
2489 /*
2490 * STR sequence must be checked before anything else
2491 * because it uses all following characters until it
2492 * receives a ESC, a SUB, a ST or any other C1 control
2493 * character.
2494 */
2495 if(term.esc & ESC_STR) {
2496 if(width == 1 &&
2497 (ascii == '\a' || ascii == 030 ||
2498 ascii == 032 || ascii == 033 ||
2499 ISCONTROLC1(unicodep))) {
2500 term.esc &= ~(ESC_START|ESC_STR);
2501 term.esc |= ESC_STR_END;
2502 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2503 memmove(&strescseq.buf[strescseq.len], c, len);
2504 strescseq.len += len;
2505 return;
2506 } else {
2507 /*
2508 * Here is a bug in terminals. If the user never sends
2509 * some code to stop the str or esc command, then st
2510 * will stop responding. But this is better than
2511 * silently failing with unknown characters. At least
2512 * then users will report back.
2513 *
2514 * In the case users ever get fixed, here is the code:
2515 */
2516 /*
2517 * term.esc = 0;
2518 * strhandle();
2519 */
2520 return;
2521 }
2522 }
2523
2524 /*
2525 * Actions of control codes must be performed as soon they arrive
2526 * because they can be embedded inside a control sequence, and
2527 * they must not cause conflicts with sequences.
2528 */
2529 if(control) {
2530 tcontrolcode(ascii);
2531 /*
2532 * control codes are not shown ever
2533 */
2534 return;
2535 } else if(term.esc & ESC_START) {
2536 if(term.esc & ESC_CSI) {
2537 csiescseq.buf[csiescseq.len++] = ascii;
2538 if(BETWEEN(ascii, 0x40, 0x7E)
2539 || csiescseq.len >= \
2540 sizeof(csiescseq.buf)-1) {
2541 term.esc = 0;
2542 csiparse();
2543 csihandle();
2544 }
2545 return;
2546 } else if(term.esc & ESC_ALTCHARSET) {
2547 tdeftran(ascii);
2548 } else if(term.esc & ESC_TEST) {
2549 tdectest(ascii);
2550 } else {
2551 switch(ascii) {
2552 case '[':
2553 term.esc |= ESC_CSI;
2554 return;
2555 case '#':
2556 term.esc |= ESC_TEST;
2557 return;
2558 case 'P': /* DCS -- Device Control String */
2559 case '_': /* APC -- Application Program Command */
2560 case '^': /* PM -- Privacy Message */
2561 case ']': /* OSC -- Operating System Command */
2562 case 'k': /* old title set compatibility */
2563 tstrsequence(ascii);
2564 return;
2565 case '(': /* set primary charset G0 */
2566 case ')': /* set secondary charset G1 */
2567 case '*': /* set tertiary charset G2 */
2568 case '+': /* set quaternary charset G3 */
2569 term.icharset = ascii - '(';
2570 term.esc |= ESC_ALTCHARSET;
2571 return;
2572 case 'D': /* IND -- Linefeed */
2573 if(term.c.y == term.bot) {
2574 tscrollup(term.top, 1);
2575 } else {
2576 tmoveto(term.c.x, term.c.y+1);
2577 }
2578 break;
2579 case 'E': /* NEL -- Next line */
2580 tnewline(1); /* always go to first col */
2581 break;
2582 case 'H': /* HTS -- Horizontal tab stop */
2583 term.tabs[term.c.x] = 1;
2584 break;
2585 case 'M': /* RI -- Reverse index */
2586 if(term.c.y == term.top) {
2587 tscrolldown(term.top, 1);
2588 } else {
2589 tmoveto(term.c.x, term.c.y-1);
2590 }
2591 break;
2592 case 'Z': /* DECID -- Identify Terminal */
2593 ttywrite(vtiden, sizeof(vtiden) - 1);
2594 break;
2595 case 'c': /* RIS -- Reset to inital state */
2596 treset();
2597 xresettitle();
2598 xloadcols();
2599 break;
2600 case '=': /* DECPAM -- Application keypad */
2601 term.mode |= MODE_APPKEYPAD;
2602 break;
2603 case '>': /* DECPNM -- Normal keypad */
2604 term.mode &= ~MODE_APPKEYPAD;
2605 break;
2606 case '7': /* DECSC -- Save Cursor */
2607 tcursor(CURSOR_SAVE);
2608 break;
2609 case '8': /* DECRC -- Restore Cursor */
2610 tcursor(CURSOR_LOAD);
2611 break;
2612 case '\\': /* ST -- String Terminator */
2613 if(term.esc & ESC_STR_END)
2614 strhandle();
2615 break;
2616 default:
2617 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2618 (uchar) ascii, isprint(ascii)? ascii:'.');
2619 break;
2620 }
2621 }
2622 term.esc = 0;
2623 /*
2624 * All characters which form part of a sequence are not
2625 * printed
2626 */
2627 return;
2628 }
2629 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2630 selclear(NULL);
2631
2632 gp = &term.line[term.c.y][term.c.x];
2633 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2634 gp->mode |= ATTR_WRAP;
2635 tnewline(1);
2636 }
2637
2638 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2639 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2640
2641 if(term.c.x+width > term.col)
2642 tnewline(1);
2643
2644 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2645
2646 if(width == 2) {
2647 gp->mode |= ATTR_WIDE;
2648 if(term.c.x+1 < term.col) {
2649 gp[1].c[0] = '\0';
2650 gp[1].mode = ATTR_WDUMMY;
2651 }
2652 }
2653 if(term.c.x+width < term.col) {
2654 tmoveto(term.c.x+width, term.c.y);
2655 } else {
2656 term.c.state |= CURSOR_WRAPNEXT;
2657 }
2658 }
2659
2660 void
2661 tresize(int col, int row) {
2662 int i;
2663 int minrow = MIN(row, term.row);
2664 int mincol = MIN(col, term.col);
2665 int slide = term.c.y - row + 1;
2666 bool *bp;
2667 TCursor c;
2668
2669 if(col < 1 || row < 1) {
2670 fprintf(stderr,
2671 "tresize: error resizing to %dx%d\n", col, row);
2672 return;
2673 }
2674
2675 /* free unneeded rows */
2676 i = 0;
2677 if(slide > 0) {
2678 /*
2679 * slide screen to keep cursor where we expect it -
2680 * tscrollup would work here, but we can optimize to
2681 * memmove because we're freeing the earlier lines
2682 */
2683 for(/* i = 0 */; i < slide; i++) {
2684 free(term.line[i]);
2685 free(term.alt[i]);
2686 }
2687 memmove(term.line, term.line + slide, row * sizeof(Line));
2688 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2689 }
2690 for(i += row; i < term.row; i++) {
2691 free(term.line[i]);
2692 free(term.alt[i]);
2693 }
2694
2695 /* resize to new height */
2696 term.line = xrealloc(term.line, row * sizeof(Line));
2697 term.alt = xrealloc(term.alt, row * sizeof(Line));
2698 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2699 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2700
2701 /* resize each row to new width, zero-pad if needed */
2702 for(i = 0; i < minrow; i++) {
2703 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2704 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2705 }
2706
2707 /* allocate any new rows */
2708 for(/* i == minrow */; i < row; i++) {
2709 term.line[i] = xmalloc(col * sizeof(Glyph));
2710 term.alt[i] = xmalloc(col * sizeof(Glyph));
2711 }
2712 if(col > term.col) {
2713 bp = term.tabs + term.col;
2714
2715 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2716 while(--bp > term.tabs && !*bp)
2717 /* nothing */ ;
2718 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2719 *bp = 1;
2720 }
2721 /* update terminal size */
2722 term.col = col;
2723 term.row = row;
2724 /* reset scrolling region */
2725 tsetscroll(0, row-1);
2726 /* make use of the LIMIT in tmoveto */
2727 tmoveto(term.c.x, term.c.y);
2728 /* Clearing both screens (it makes dirty all lines) */
2729 c = term.c;
2730 for(i = 0; i < 2; i++) {
2731 if(mincol < col && 0 < minrow) {
2732 tclearregion(mincol, 0, col - 1, minrow - 1);
2733 }
2734 if(0 < col && minrow < row) {
2735 tclearregion(0, minrow, col - 1, row - 1);
2736 }
2737 tswapscreen();
2738 tcursor(CURSOR_LOAD);
2739 }
2740 term.c = c;
2741 }
2742
2743 void
2744 xresize(int col, int row) {
2745 xw.tw = MAX(1, col * xw.cw);
2746 xw.th = MAX(1, row * xw.ch);
2747
2748 XFreePixmap(xw.dpy, xw.buf);
2749 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2750 DefaultDepth(xw.dpy, xw.scr));
2751 XftDrawChange(xw.draw, xw.buf);
2752 xclear(0, 0, xw.w, xw.h);
2753 }
2754
2755 static inline ushort
2756 sixd_to_16bit(int x) {
2757 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2758 }
2759
2760 void
2761 xloadcols(void) {
2762 int i;
2763 XRenderColor color = { .alpha = 0xffff };
2764 static bool loaded;
2765 Color *cp;
2766
2767 if(loaded) {
2768 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2769 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2770 }
2771
2772 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2773 for(i = 0; i < LEN(colorname); i++) {
2774 if(!colorname[i])
2775 continue;
2776 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2777 die("Could not allocate color '%s'\n", colorname[i]);
2778 }
2779 }
2780
2781 /* load colors [16-231] ; same colors as xterm */
2782 for(i = 16; i < 6*6*6+16; i++) {
2783 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2784 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2785 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2786 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2787 die("Could not allocate color %d\n", i);
2788 }
2789
2790 /* load colors [232-255] ; grayscale */
2791 for(; i < 256; i++) {
2792 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2793 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2794 die("Could not allocate color %d\n", i);
2795 }
2796 loaded = true;
2797 }
2798
2799 int
2800 xsetcolorname(int x, const char *name) {
2801 XRenderColor color = { .alpha = 0xffff };
2802 Color ncolor;
2803
2804 if(!BETWEEN(x, 0, LEN(colorname)))
2805 return 1;
2806
2807 if(!name) {
2808 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2809 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2810 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2811 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2812 if(!XftColorAllocValue(xw.dpy, xw.vis,
2813 xw.cmap, &color, &ncolor)) {
2814 return 1;
2815 }
2816
2817 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2818 dc.col[x] = ncolor;
2819 return 0;
2820 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2821 color.red = color.green = color.blue = \
2822 0x0808 + 0x0a0a * (x - (16 + 216));
2823 if(!XftColorAllocValue(xw.dpy, xw.vis,
2824 xw.cmap, &color, &ncolor)) {
2825 return 1;
2826 }
2827
2828 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2829 dc.col[x] = ncolor;
2830 return 0;
2831 } else { /* system colors */
2832 name = colorname[x];
2833 }
2834 }
2835 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2836 return 1;
2837
2838 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2839 dc.col[x] = ncolor;
2840 return 0;
2841 }
2842
2843 void
2844 xtermclear(int col1, int row1, int col2, int row2) {
2845 XftDrawRect(xw.draw,
2846 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2847 borderpx + col1 * xw.cw,
2848 borderpx + row1 * xw.ch,
2849 (col2-col1+1) * xw.cw,
2850 (row2-row1+1) * xw.ch);
2851 }
2852
2853 /*
2854 * Absolute coordinates.
2855 */
2856 void
2857 xclear(int x1, int y1, int x2, int y2) {
2858 XftDrawRect(xw.draw,
2859 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2860 x1, y1, x2-x1, y2-y1);
2861 }
2862
2863 void
2864 xhints(void) {
2865 XClassHint class = {opt_class ? opt_class : termname, termname};
2866 XWMHints wm = {.flags = InputHint, .input = 1};
2867 XSizeHints *sizeh = NULL;
2868
2869 sizeh = XAllocSizeHints();
2870
2871 sizeh->flags = PSize | PResizeInc | PBaseSize;
2872 sizeh->height = xw.h;
2873 sizeh->width = xw.w;
2874 sizeh->height_inc = xw.ch;
2875 sizeh->width_inc = xw.cw;
2876 sizeh->base_height = 2 * borderpx;
2877 sizeh->base_width = 2 * borderpx;
2878 if(xw.isfixed == True) {
2879 sizeh->flags |= PMaxSize | PMinSize;
2880 sizeh->min_width = sizeh->max_width = xw.w;
2881 sizeh->min_height = sizeh->max_height = xw.h;
2882 }
2883 if(xw.gm & (XValue|YValue)) {
2884 sizeh->flags |= USPosition | PWinGravity;
2885 sizeh->x = xw.l;
2886 sizeh->y = xw.t;
2887 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2888 }
2889
2890 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2891 &class);
2892 XFree(sizeh);
2893 }
2894
2895 int
2896 xgeommasktogravity(int mask) {
2897 switch(mask & (XNegative|YNegative)) {
2898 case 0:
2899 return NorthWestGravity;
2900 case XNegative:
2901 return NorthEastGravity;
2902 case YNegative:
2903 return SouthWestGravity;
2904 }
2905 return SouthEastGravity;
2906 }
2907
2908 int
2909 xloadfont(Font *f, FcPattern *pattern) {
2910 FcPattern *match;
2911 FcResult result;
2912
2913 match = FcFontMatch(NULL, pattern, &result);
2914 if(!match)
2915 return 1;
2916
2917 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2918 FcPatternDestroy(match);
2919 return 1;
2920 }
2921
2922 f->set = NULL;
2923 f->pattern = FcPatternDuplicate(pattern);
2924
2925 f->ascent = f->match->ascent;
2926 f->descent = f->match->descent;
2927 f->lbearing = 0;
2928 f->rbearing = f->match->max_advance_width;
2929
2930 f->height = f->ascent + f->descent;
2931 f->width = f->lbearing + f->rbearing;
2932
2933 return 0;
2934 }
2935
2936 void
2937 xloadfonts(char *fontstr, double fontsize) {
2938 FcPattern *pattern;
2939 FcResult r_sz, r_psz;
2940 double fontval;
2941 float ceilf(float);
2942
2943 if(fontstr[0] == '-') {
2944 pattern = XftXlfdParse(fontstr, False, False);
2945 } else {
2946 pattern = FcNameParse((FcChar8 *)fontstr);
2947 }
2948
2949 if(!pattern)
2950 die("st: can't open font %s\n", fontstr);
2951
2952 if(fontsize > 0) {
2953 FcPatternDel(pattern, FC_PIXEL_SIZE);
2954 FcPatternDel(pattern, FC_SIZE);
2955 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2956 usedfontsize = fontsize;
2957 } else {
2958 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2959 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2960 if(r_psz == FcResultMatch) {
2961 usedfontsize = fontval;
2962 } else if(r_sz == FcResultMatch) {
2963 usedfontsize = -1;
2964 } else {
2965 /*
2966 * Default font size is 12, if none given. This is to
2967 * have a known usedfontsize value.
2968 */
2969 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2970 usedfontsize = 12;
2971 }
2972 }
2973
2974 FcConfigSubstitute(0, pattern, FcMatchPattern);
2975 FcDefaultSubstitute(pattern);
2976
2977 if(xloadfont(&dc.font, pattern))
2978 die("st: can't open font %s\n", fontstr);
2979
2980 if(usedfontsize < 0) {
2981 FcPatternGetDouble(dc.font.match->pattern,
2982 FC_PIXEL_SIZE, 0, &fontval);
2983 usedfontsize = fontval;
2984 }
2985
2986 /* Setting character width and height. */
2987 xw.cw = ceilf(dc.font.width * cwscale);
2988 xw.ch = ceilf(dc.font.height * chscale);
2989
2990 FcPatternDel(pattern, FC_SLANT);
2991 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2992 if(xloadfont(&dc.ifont, pattern))
2993 die("st: can't open font %s\n", fontstr);
2994
2995 FcPatternDel(pattern, FC_WEIGHT);
2996 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2997 if(xloadfont(&dc.ibfont, pattern))
2998 die("st: can't open font %s\n", fontstr);
2999
3000 FcPatternDel(pattern, FC_SLANT);
3001 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3002 if(xloadfont(&dc.bfont, pattern))
3003 die("st: can't open font %s\n", fontstr);
3004
3005 FcPatternDestroy(pattern);
3006 }
3007
3008 int
3009 xloadfontset(Font *f) {
3010 FcResult result;
3011
3012 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3013 return 1;
3014 return 0;
3015 }
3016
3017 void
3018 xunloadfont(Font *f) {
3019 XftFontClose(xw.dpy, f->match);
3020 FcPatternDestroy(f->pattern);
3021 if(f->set)
3022 FcFontSetDestroy(f->set);
3023 }
3024
3025 void
3026 xunloadfonts(void) {
3027 /* Free the loaded fonts in the font cache. */
3028 while(frclen > 0)
3029 XftFontClose(xw.dpy, frc[--frclen].font);
3030
3031 xunloadfont(&dc.font);
3032 xunloadfont(&dc.bfont);
3033 xunloadfont(&dc.ifont);
3034 xunloadfont(&dc.ibfont);
3035 }
3036
3037 void
3038 xzoom(const Arg *arg) {
3039 xunloadfonts();
3040 xloadfonts(usedfont, usedfontsize + arg->i);
3041 cresize(0, 0);
3042 redraw(0);
3043 xhints();
3044 }
3045
3046 void
3047 xinit(void) {
3048 XGCValues gcvalues;
3049 Cursor cursor;
3050 Window parent;
3051 pid_t thispid = getpid();
3052
3053 if(!(xw.dpy = XOpenDisplay(NULL)))
3054 die("Can't open display\n");
3055 xw.scr = XDefaultScreen(xw.dpy);
3056 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3057
3058 /* font */
3059 if(!FcInit())
3060 die("Could not init fontconfig.\n");
3061
3062 usedfont = (opt_font == NULL)? font : opt_font;
3063 xloadfonts(usedfont, 0);
3064
3065 /* colors */
3066 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3067 xloadcols();
3068
3069 /* adjust fixed window geometry */
3070 xw.w = 2 * borderpx + term.col * xw.cw;
3071 xw.h = 2 * borderpx + term.row * xw.ch;
3072 if(xw.gm & XNegative)
3073 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3074 if(xw.gm & YNegative)
3075 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3076
3077 /* Events */
3078 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3079 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3080 xw.attrs.bit_gravity = NorthWestGravity;
3081 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3082 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3083 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3084 xw.attrs.colormap = xw.cmap;
3085
3086 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3087 XRootWindow(xw.dpy, xw.scr);
3088 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3089 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3090 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3091 | CWEventMask | CWColormap, &xw.attrs);
3092
3093 memset(&gcvalues, 0, sizeof(gcvalues));
3094 gcvalues.graphics_exposures = False;
3095 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3096 &gcvalues);
3097 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3098 DefaultDepth(xw.dpy, xw.scr));
3099 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3100 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3101
3102 /* Xft rendering context */
3103 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3104
3105 /* input methods */
3106 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3107 XSetLocaleModifiers("@im=local");
3108 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3109 XSetLocaleModifiers("@im=");
3110 if((xw.xim = XOpenIM(xw.dpy,
3111 NULL, NULL, NULL)) == NULL) {
3112 die("XOpenIM failed. Could not open input"
3113 " device.\n");
3114 }
3115 }
3116 }
3117 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3118 | XIMStatusNothing, XNClientWindow, xw.win,
3119 XNFocusWindow, xw.win, NULL);
3120 if(xw.xic == NULL)
3121 die("XCreateIC failed. Could not obtain input method.\n");
3122
3123 /* white cursor, black outline */
3124 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3125 XDefineCursor(xw.dpy, xw.win, cursor);
3126 XRecolorCursor(xw.dpy, cursor,
3127 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3128 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3129
3130 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3131 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3132 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3133 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3134
3135 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3136 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3137 PropModeReplace, (uchar *)&thispid, 1);
3138
3139 xresettitle();
3140 XMapWindow(xw.dpy, xw.win);
3141 xhints();
3142 XSync(xw.dpy, False);
3143 }
3144
3145 void
3146 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3147 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3148 width = charlen * xw.cw, xp, i;
3149 int frcflags;
3150 int u8fl, u8fblen, u8cblen, doesexist;
3151 char *u8c, *u8fs;
3152 long unicodep;
3153 Font *font = &dc.font;
3154 FcResult fcres;
3155 FcPattern *fcpattern, *fontpattern;
3156 FcFontSet *fcsets[] = { NULL };
3157 FcCharSet *fccharset;
3158 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3159 XRenderColor colfg, colbg;
3160 XRectangle r;
3161 int oneatatime;
3162
3163 frcflags = FRC_NORMAL;
3164
3165 if(base.mode & ATTR_ITALIC) {
3166 if(base.fg == defaultfg)
3167 base.fg = defaultitalic;
3168 font = &dc.ifont;
3169 frcflags = FRC_ITALIC;
3170 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3171 if(base.fg == defaultfg)
3172 base.fg = defaultitalic;
3173 font = &dc.ibfont;
3174 frcflags = FRC_ITALICBOLD;
3175 } else if(base.mode & ATTR_UNDERLINE) {
3176 if(base.fg == defaultfg)
3177 base.fg = defaultunderline;
3178 }
3179
3180 if(IS_TRUECOL(base.fg)) {
3181 colfg.alpha = 0xffff;
3182 colfg.red = TRUERED(base.fg);
3183 colfg.green = TRUEGREEN(base.fg);
3184 colfg.blue = TRUEBLUE(base.fg);
3185 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3186 fg = &truefg;
3187 } else {
3188 fg = &dc.col[base.fg];
3189 }
3190
3191 if(IS_TRUECOL(base.bg)) {
3192 colbg.alpha = 0xffff;
3193 colbg.green = TRUEGREEN(base.bg);
3194 colbg.red = TRUERED(base.bg);
3195 colbg.blue = TRUEBLUE(base.bg);
3196 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3197 bg = &truebg;
3198 } else {
3199 bg = &dc.col[base.bg];
3200 }
3201
3202 if(base.mode & ATTR_BOLD) {
3203 /*
3204 * change basic system colors [0-7]
3205 * to bright system colors [8-15]
3206 */
3207 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3208 fg = &dc.col[base.fg + 8];
3209
3210 if(base.mode & ATTR_ITALIC) {
3211 font = &dc.ibfont;
3212 frcflags = FRC_ITALICBOLD;
3213 } else {
3214 font = &dc.bfont;
3215 frcflags = FRC_BOLD;
3216 }
3217 }
3218
3219 if(IS_SET(MODE_REVERSE)) {
3220 if(fg == &dc.col[defaultfg]) {
3221 fg = &dc.col[defaultbg];
3222 } else {
3223 colfg.red = ~fg->color.red;
3224 colfg.green = ~fg->color.green;
3225 colfg.blue = ~fg->color.blue;
3226 colfg.alpha = fg->color.alpha;
3227 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3228 &revfg);
3229 fg = &revfg;
3230 }
3231
3232 if(bg == &dc.col[defaultbg]) {
3233 bg = &dc.col[defaultfg];
3234 } else {
3235 colbg.red = ~bg->color.red;
3236 colbg.green = ~bg->color.green;
3237 colbg.blue = ~bg->color.blue;
3238 colbg.alpha = bg->color.alpha;
3239 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3240 &revbg);
3241 bg = &revbg;
3242 }
3243 }
3244
3245 if(base.mode & ATTR_REVERSE) {
3246 temp = fg;
3247 fg = bg;
3248 bg = temp;
3249 }
3250
3251 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3252 colfg.red = fg->color.red / 2;
3253 colfg.green = fg->color.green / 2;
3254 colfg.blue = fg->color.blue / 2;
3255 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3256 fg = &revfg;
3257 }
3258
3259 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3260 fg = bg;
3261
3262 if(base.mode & ATTR_INVISIBLE)
3263 fg = bg;
3264
3265 /* Intelligent cleaning up of the borders. */
3266 if(x == 0) {
3267 xclear(0, (y == 0)? 0 : winy, borderpx,
3268 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3269 }
3270 if(x + charlen >= term.col) {
3271 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3272 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3273 }
3274 if(y == 0)
3275 xclear(winx, 0, winx + width, borderpx);
3276 if(y == term.row-1)
3277 xclear(winx, winy + xw.ch, winx + width, xw.h);
3278
3279 /* Clean up the region we want to draw to. */
3280 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3281
3282 /* Set the clip region because Xft is sometimes dirty. */
3283 r.x = 0;
3284 r.y = 0;
3285 r.height = xw.ch;
3286 r.width = width;
3287 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3288
3289 for(xp = winx; bytelen > 0;) {
3290 /*
3291 * Search for the range in the to be printed string of glyphs
3292 * that are in the main font. Then print that range. If
3293 * some glyph is found that is not in the font, do the
3294 * fallback dance.
3295 */
3296 u8fs = s;
3297 u8fblen = 0;
3298 u8fl = 0;
3299 oneatatime = font->width != xw.cw;
3300 for(;;) {
3301 u8c = s;
3302 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3303 s += u8cblen;
3304 bytelen -= u8cblen;
3305
3306 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3307 if(doesexist) {
3308 u8fl++;
3309 u8fblen += u8cblen;
3310 if(!oneatatime && bytelen > 0)
3311 continue;
3312 }
3313
3314 if(u8fl > 0) {
3315 XftDrawStringUtf8(xw.draw, fg,
3316 font->match, xp,
3317 winy + font->ascent,
3318 (FcChar8 *)u8fs,
3319 u8fblen);
3320 xp += xw.cw * u8fl;
3321 }
3322 break;
3323 }
3324 if(doesexist) {
3325 if(oneatatime)
3326 continue;
3327 break;
3328 }
3329
3330 /* Search the font cache. */
3331 for(i = 0; i < frclen; i++) {
3332 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3333 && frc[i].flags == frcflags) {
3334 break;
3335 }
3336 }
3337
3338 /* Nothing was found. */
3339 if(i >= frclen) {
3340 if(!font->set)
3341 xloadfontset(font);
3342 fcsets[0] = font->set;
3343
3344 /*
3345 * Nothing was found in the cache. Now use
3346 * some dozen of Fontconfig calls to get the
3347 * font for one single character.
3348 *
3349 * Xft and fontconfig are design failures.
3350 */
3351 fcpattern = FcPatternDuplicate(font->pattern);
3352 fccharset = FcCharSetCreate();
3353
3354 FcCharSetAddChar(fccharset, unicodep);
3355 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3356 fccharset);
3357 FcPatternAddBool(fcpattern, FC_SCALABLE,
3358 FcTrue);
3359
3360 FcConfigSubstitute(0, fcpattern,
3361 FcMatchPattern);
3362 FcDefaultSubstitute(fcpattern);
3363
3364 fontpattern = FcFontSetMatch(0, fcsets,
3365 FcTrue, fcpattern, &fcres);
3366
3367 /*
3368 * Overwrite or create the new cache entry.
3369 */
3370 if(frclen >= LEN(frc)) {
3371 frclen = LEN(frc) - 1;
3372 XftFontClose(xw.dpy, frc[frclen].font);
3373 }
3374
3375 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3376 fontpattern);
3377 frc[frclen].flags = frcflags;
3378
3379 i = frclen;
3380 frclen++;
3381
3382 FcPatternDestroy(fcpattern);
3383 FcCharSetDestroy(fccharset);
3384 }
3385
3386 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3387 xp, winy + frc[i].font->ascent,
3388 (FcChar8 *)u8c, u8cblen);
3389
3390 xp += xw.cw * wcwidth(unicodep);
3391 }
3392
3393 /*
3394 * This is how the loop above actually should be. Why does the
3395 * application have to care about font details?
3396 *
3397 * I have to repeat: Xft and Fontconfig are design failures.
3398 */
3399 /*
3400 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3401 winy + font->ascent, (FcChar8 *)s, bytelen);
3402 */
3403
3404 if(base.mode & ATTR_UNDERLINE) {
3405 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3406 width, 1);
3407 }
3408
3409 if(base.mode & ATTR_STRUCK) {
3410 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3411 width, 1);
3412 }
3413
3414 /* Reset clip to none. */
3415 XftDrawSetClip(xw.draw, 0);
3416 }
3417
3418 void
3419 xdrawcursor(void) {
3420 static int oldx = 0, oldy = 0;
3421 int sl, width, curx;
3422 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3423
3424 LIMIT(oldx, 0, term.col-1);
3425 LIMIT(oldy, 0, term.row-1);
3426
3427 curx = term.c.x;
3428
3429 /* adjust position if in dummy */
3430 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3431 oldx--;
3432 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3433 curx--;
3434
3435 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3436
3437 /* remove the old cursor */
3438 sl = utf8len(term.line[oldy][oldx].c);
3439 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3440 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3441 oldy, width, sl);
3442
3443 /* draw the new one */
3444 if(!(IS_SET(MODE_HIDE))) {
3445 if(xw.state & WIN_FOCUSED) {
3446 if(IS_SET(MODE_REVERSE)) {
3447 g.mode |= ATTR_REVERSE;
3448 g.fg = defaultcs;
3449 g.bg = defaultfg;
3450 }
3451
3452 sl = utf8len(g.c);
3453 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3454 ? 2 : 1;
3455 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3456 } else {
3457 XftDrawRect(xw.draw, &dc.col[defaultcs],
3458 borderpx + curx * xw.cw,
3459 borderpx + term.c.y * xw.ch,
3460 xw.cw - 1, 1);
3461 XftDrawRect(xw.draw, &dc.col[defaultcs],
3462 borderpx + curx * xw.cw,
3463 borderpx + term.c.y * xw.ch,
3464 1, xw.ch - 1);
3465 XftDrawRect(xw.draw, &dc.col[defaultcs],
3466 borderpx + (curx + 1) * xw.cw - 1,
3467 borderpx + term.c.y * xw.ch,
3468 1, xw.ch - 1);
3469 XftDrawRect(xw.draw, &dc.col[defaultcs],
3470 borderpx + curx * xw.cw,
3471 borderpx + (term.c.y + 1) * xw.ch - 1,
3472 xw.cw, 1);
3473 }
3474 oldx = curx, oldy = term.c.y;
3475 }
3476 }
3477
3478
3479 void
3480 xsettitle(char *p) {
3481 XTextProperty prop;
3482
3483 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3484 &prop);
3485 XSetWMName(xw.dpy, xw.win, &prop);
3486 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3487 XFree(prop.value);
3488 }
3489
3490 void
3491 xresettitle(void) {
3492 xsettitle(opt_title ? opt_title : "st");
3493 }
3494
3495 void
3496 redraw(int timeout) {
3497 struct timespec tv = {0, timeout * 1000};
3498
3499 tfulldirt();
3500 draw();
3501
3502 if(timeout > 0) {
3503 nanosleep(&tv, NULL);
3504 XSync(xw.dpy, False); /* necessary for a good tput flash */
3505 }
3506 }
3507
3508 void
3509 draw(void) {
3510 drawregion(0, 0, term.col, term.row);
3511 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3512 xw.h, 0, 0);
3513 XSetForeground(xw.dpy, dc.gc,
3514 dc.col[IS_SET(MODE_REVERSE)?
3515 defaultfg : defaultbg].pixel);
3516 }
3517
3518 void
3519 drawregion(int x1, int y1, int x2, int y2) {
3520 int ic, ib, x, y, ox, sl;
3521 Glyph base, new;
3522 char buf[DRAW_BUF_SIZ];
3523 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3524 long unicodep;
3525
3526 if(!(xw.state & WIN_VISIBLE))
3527 return;
3528
3529 for(y = y1; y < y2; y++) {
3530 if(!term.dirty[y])
3531 continue;
3532
3533 xtermclear(0, y, term.col, y);
3534 term.dirty[y] = 0;
3535 base = term.line[y][0];
3536 ic = ib = ox = 0;
3537 for(x = x1; x < x2; x++) {
3538 new = term.line[y][x];
3539 if(new.mode == ATTR_WDUMMY)
3540 continue;
3541 if(ena_sel && selected(x, y))
3542 new.mode ^= ATTR_REVERSE;
3543 if(ib > 0 && (ATTRCMP(base, new)
3544 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3545 xdraws(buf, base, ox, y, ic, ib);
3546 ic = ib = 0;
3547 }
3548 if(ib == 0) {
3549 ox = x;
3550 base = new;
3551 }
3552
3553 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3554 memcpy(buf+ib, new.c, sl);
3555 ib += sl;
3556 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3557 }
3558 if(ib > 0)
3559 xdraws(buf, base, ox, y, ic, ib);
3560 }
3561 xdrawcursor();
3562 }
3563
3564 void
3565 expose(XEvent *ev) {
3566 XExposeEvent *e = &ev->xexpose;
3567
3568 if(xw.state & WIN_REDRAW) {
3569 if(!e->count)
3570 xw.state &= ~WIN_REDRAW;
3571 }
3572 redraw(0);
3573 }
3574
3575 void
3576 visibility(XEvent *ev) {
3577 XVisibilityEvent *e = &ev->xvisibility;
3578
3579 if(e->state == VisibilityFullyObscured) {
3580 xw.state &= ~WIN_VISIBLE;
3581 } else if(!(xw.state & WIN_VISIBLE)) {
3582 /* need a full redraw for next Expose, not just a buf copy */
3583 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3584 }
3585 }
3586
3587 void
3588 unmap(XEvent *ev) {
3589 xw.state &= ~WIN_VISIBLE;
3590 }
3591
3592 void
3593 xsetpointermotion(int set) {
3594 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3595 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3596 }
3597
3598 void
3599 xseturgency(int add) {
3600 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3601
3602 MODBIT(h->flags, add, XUrgencyHint);
3603 XSetWMHints(xw.dpy, xw.win, h);
3604 XFree(h);
3605 }
3606
3607 void
3608 focus(XEvent *ev) {
3609 XFocusChangeEvent *e = &ev->xfocus;
3610
3611 if(e->mode == NotifyGrab)
3612 return;
3613
3614 if(ev->type == FocusIn) {
3615 XSetICFocus(xw.xic);
3616 xw.state |= WIN_FOCUSED;
3617 xseturgency(0);
3618 if(IS_SET(MODE_FOCUS))
3619 ttywrite("\033[I", 3);
3620 } else {
3621 XUnsetICFocus(xw.xic);
3622 xw.state &= ~WIN_FOCUSED;
3623 if(IS_SET(MODE_FOCUS))
3624 ttywrite("\033[O", 3);
3625 }
3626 }
3627
3628 static inline bool
3629 match(uint mask, uint state) {
3630 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3631 }
3632
3633 void
3634 numlock(const Arg *dummy) {
3635 term.numlock ^= 1;
3636 }
3637
3638 char*
3639 kmap(KeySym k, uint state) {
3640 Key *kp;
3641 int i;
3642
3643 /* Check for mapped keys out of X11 function keys. */
3644 for(i = 0; i < LEN(mappedkeys); i++) {
3645 if(mappedkeys[i] == k)
3646 break;
3647 }
3648 if(i == LEN(mappedkeys)) {
3649 if((k & 0xFFFF) < 0xFD00)
3650 return NULL;
3651 }
3652
3653 for(kp = key; kp < key + LEN(key); kp++) {
3654 if(kp->k != k)
3655 continue;
3656
3657 if(!match(kp->mask, state))
3658 continue;
3659
3660 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3661 continue;
3662 if(term.numlock && kp->appkey == 2)
3663 continue;
3664
3665 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3666 continue;
3667
3668 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3669 continue;
3670
3671 return kp->s;
3672 }
3673
3674 return NULL;
3675 }
3676
3677 void
3678 kpress(XEvent *ev) {
3679 XKeyEvent *e = &ev->xkey;
3680 KeySym ksym;
3681 char buf[32], *customkey;
3682 int len;
3683 long c;
3684 Status status;
3685 Shortcut *bp;
3686
3687 if(IS_SET(MODE_KBDLOCK))
3688 return;
3689
3690 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3691 /* 1. shortcuts */
3692 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3693 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3694 bp->func(&(bp->arg));
3695 return;
3696 }
3697 }
3698
3699 /* 2. custom keys from config.h */
3700 if((customkey = kmap(ksym, e->state))) {
3701 ttysend(customkey, strlen(customkey));
3702 return;
3703 }
3704
3705 /* 3. composed string from input method */
3706 if(len == 0)
3707 return;
3708 if(len == 1 && e->state & Mod1Mask) {
3709 if(IS_SET(MODE_8BIT)) {
3710 if(*buf < 0177) {
3711 c = *buf | 0x80;
3712 len = utf8encode(c, buf, UTF_SIZ);
3713 }
3714 } else {
3715 buf[1] = buf[0];
3716 buf[0] = '\033';
3717 len = 2;
3718 }
3719 }
3720 ttysend(buf, len);
3721 }
3722
3723
3724 void
3725 cmessage(XEvent *e) {
3726 /*
3727 * See xembed specs
3728 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3729 */
3730 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3731 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3732 xw.state |= WIN_FOCUSED;
3733 xseturgency(0);
3734 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3735 xw.state &= ~WIN_FOCUSED;
3736 }
3737 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3738 /* Send SIGHUP to shell */
3739 kill(pid, SIGHUP);
3740 exit(EXIT_SUCCESS);
3741 }
3742 }
3743
3744 void
3745 cresize(int width, int height) {
3746 int col, row;
3747
3748 if(width != 0)
3749 xw.w = width;
3750 if(height != 0)
3751 xw.h = height;
3752
3753 col = (xw.w - 2 * borderpx) / xw.cw;
3754 row = (xw.h - 2 * borderpx) / xw.ch;
3755
3756 tresize(col, row);
3757 xresize(col, row);
3758 ttyresize();
3759 }
3760
3761 void
3762 resize(XEvent *e) {
3763 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3764 return;
3765
3766 cresize(e->xconfigure.width, e->xconfigure.height);
3767 }
3768
3769 void
3770 run(void) {
3771 XEvent ev;
3772 int w = xw.w, h = xw.h;
3773 fd_set rfd;
3774 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3775 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3776 long deltatime;
3777
3778 /* Waiting for window mapping */
3779 while(1) {
3780 XNextEvent(xw.dpy, &ev);
3781 if(XFilterEvent(&ev, None))
3782 continue;
3783 if(ev.type == ConfigureNotify) {
3784 w = ev.xconfigure.width;
3785 h = ev.xconfigure.height;
3786 } else if(ev.type == MapNotify) {
3787 break;
3788 }
3789 }
3790
3791 ttynew();
3792 cresize(w, h);
3793
3794 clock_gettime(CLOCK_MONOTONIC, &last);
3795 lastblink = last;
3796
3797 for(xev = actionfps;;) {
3798 FD_ZERO(&rfd);
3799 FD_SET(cmdfd, &rfd);
3800 FD_SET(xfd, &rfd);
3801
3802 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3803 if(errno == EINTR)
3804 continue;
3805 die("select failed: %s\n", strerror(errno));
3806 }
3807 if(FD_ISSET(cmdfd, &rfd)) {
3808 ttyread();
3809 if(blinktimeout) {
3810 blinkset = tattrset(ATTR_BLINK);
3811 if(!blinkset)
3812 MODBIT(term.mode, 0, MODE_BLINK);
3813 }
3814 }
3815
3816 if(FD_ISSET(xfd, &rfd))
3817 xev = actionfps;
3818
3819 clock_gettime(CLOCK_MONOTONIC, &now);
3820 drawtimeout.tv_sec = 0;
3821 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3822 tv = &drawtimeout;
3823
3824 dodraw = 0;
3825 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3826 tsetdirtattr(ATTR_BLINK);
3827 term.mode ^= MODE_BLINK;
3828 lastblink = now;
3829 dodraw = 1;
3830 }
3831 deltatime = TIMEDIFF(now, last);
3832 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3833 || deltatime < 0) {
3834 dodraw = 1;
3835 last = now;
3836 }
3837
3838 if(dodraw) {
3839 while(XPending(xw.dpy)) {
3840 XNextEvent(xw.dpy, &ev);
3841 if(XFilterEvent(&ev, None))
3842 continue;
3843 if(handler[ev.type])
3844 (handler[ev.type])(&ev);
3845 }
3846
3847 draw();
3848 XFlush(xw.dpy);
3849
3850 if(xev && !FD_ISSET(xfd, &rfd))
3851 xev--;
3852 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3853 if(blinkset) {
3854 if(TIMEDIFF(now, lastblink) \
3855 > blinktimeout) {
3856 drawtimeout.tv_nsec = 1000;
3857 } else {
3858 drawtimeout.tv_nsec = (1E6 * \
3859 (blinktimeout - \
3860 TIMEDIFF(now,
3861 lastblink)));
3862 }
3863 } else {
3864 tv = NULL;
3865 }
3866 }
3867 }
3868 }
3869 }
3870
3871 void
3872 usage(void) {
3873 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3874 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3875 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3876 }
3877
3878 int
3879 main(int argc, char *argv[]) {
3880 char *titles;
3881 uint cols = 80, rows = 24;
3882
3883 xw.l = xw.t = 0;
3884 xw.isfixed = False;
3885
3886 ARGBEGIN {
3887 case 'a':
3888 allowaltscreen = false;
3889 break;
3890 case 'c':
3891 opt_class = EARGF(usage());
3892 break;
3893 case 'e':
3894 /* eat all remaining arguments */
3895 if(argc > 1) {
3896 opt_cmd = &argv[1];
3897 if(argv[1] != NULL && opt_title == NULL) {
3898 titles = xstrdup(argv[1]);
3899 opt_title = basename(titles);
3900 }
3901 }
3902 goto run;
3903 case 'f':
3904 opt_font = EARGF(usage());
3905 break;
3906 case 'g':
3907 xw.gm = XParseGeometry(EARGF(usage()),
3908 &xw.l, &xw.t, &cols, &rows);
3909 break;
3910 case 'i':
3911 xw.isfixed = True;
3912 break;
3913 case 'o':
3914 opt_io = EARGF(usage());
3915 break;
3916 case 't':
3917 opt_title = EARGF(usage());
3918 break;
3919 case 'w':
3920 opt_embed = EARGF(usage());
3921 break;
3922 case 'v':
3923 default:
3924 usage();
3925 } ARGEND;
3926
3927 run:
3928 setlocale(LC_CTYPE, "");
3929 XSetLocaleModifiers("");
3930 tnew(cols? cols : 1, rows? rows : 1);
3931 xinit();
3932 selinit();
3933 run();
3934
3935 return 0;
3936 }
3937