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0c6b9c3542f646fdcdc5d06c1eb4810ad25858ee
[st.git] / st.c
1 /* See LICENSE for license 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 <X11/XKBlib.h>
31 #include <fontconfig/fontconfig.h>
32 #include <wchar.h>
33
34 #include "arg.h"
35
36 char *argv0;
37
38 #define Glyph Glyph_
39 #define Font Font_
40
41 #if defined(__linux)
42 #include <pty.h>
43 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
44 #include <util.h>
45 #elif defined(__FreeBSD__) || defined(__DragonFly__)
46 #include <libutil.h>
47 #endif
48
49
50 /* XEMBED messages */
51 #define XEMBED_FOCUS_IN 4
52 #define XEMBED_FOCUS_OUT 5
53
54 /* Arbitrary sizes */
55 #define UTF_INVALID 0xFFFD
56 #define UTF_SIZ 4
57 #define ESC_BUF_SIZ (128*UTF_SIZ)
58 #define ESC_ARG_SIZ 16
59 #define STR_BUF_SIZ ESC_BUF_SIZ
60 #define STR_ARG_SIZ ESC_ARG_SIZ
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 /* macros */
66 #define MIN(a, b) ((a) < (b) ? (a) : (b))
67 #define MAX(a, b) ((a) < (b) ? (b) : (a))
68 #define LEN(a) (sizeof(a) / sizeof(a)[0])
69 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
70 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
71 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
72 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
73 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
74 #define ISDELIM(u) (BETWEEN(u, 0, 127) && strchr(worddelimiters, u) != NULL)
75 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
80
81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
82 #define IS_TRUECOL(x) (1 << 24 & (x))
83 #define TRUERED(x) (((x) & 0xff0000) >> 8)
84 #define TRUEGREEN(x) (((x) & 0xff00))
85 #define TRUEBLUE(x) (((x) & 0xff) << 8)
86
87
88 enum glyph_attribute {
89 ATTR_NULL = 0,
90 ATTR_BOLD = 1 << 0,
91 ATTR_FAINT = 1 << 1,
92 ATTR_ITALIC = 1 << 2,
93 ATTR_UNDERLINE = 1 << 3,
94 ATTR_BLINK = 1 << 4,
95 ATTR_REVERSE = 1 << 5,
96 ATTR_INVISIBLE = 1 << 6,
97 ATTR_STRUCK = 1 << 7,
98 ATTR_WRAP = 1 << 8,
99 ATTR_WIDE = 1 << 9,
100 ATTR_WDUMMY = 1 << 10,
101 ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
102 };
103
104 enum cursor_movement {
105 CURSOR_SAVE,
106 CURSOR_LOAD
107 };
108
109 enum cursor_state {
110 CURSOR_DEFAULT = 0,
111 CURSOR_WRAPNEXT = 1,
112 CURSOR_ORIGIN = 2
113 };
114
115 enum term_mode {
116 MODE_WRAP = 1 << 0,
117 MODE_INSERT = 1 << 1,
118 MODE_APPKEYPAD = 1 << 2,
119 MODE_ALTSCREEN = 1 << 3,
120 MODE_CRLF = 1 << 4,
121 MODE_MOUSEBTN = 1 << 5,
122 MODE_MOUSEMOTION = 1 << 6,
123 MODE_REVERSE = 1 << 7,
124 MODE_KBDLOCK = 1 << 8,
125 MODE_HIDE = 1 << 9,
126 MODE_ECHO = 1 << 10,
127 MODE_APPCURSOR = 1 << 11,
128 MODE_MOUSESGR = 1 << 12,
129 MODE_8BIT = 1 << 13,
130 MODE_BLINK = 1 << 14,
131 MODE_FBLINK = 1 << 15,
132 MODE_FOCUS = 1 << 16,
133 MODE_MOUSEX10 = 1 << 17,
134 MODE_MOUSEMANY = 1 << 18,
135 MODE_BRCKTPASTE = 1 << 19,
136 MODE_PRINT = 1 << 20,
137 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
138 |MODE_MOUSEMANY,
139 };
140
141 enum charset {
142 CS_GRAPHIC0,
143 CS_GRAPHIC1,
144 CS_UK,
145 CS_USA,
146 CS_MULTI,
147 CS_GER,
148 CS_FIN
149 };
150
151 enum escape_state {
152 ESC_START = 1,
153 ESC_CSI = 2,
154 ESC_STR = 4, /* DCS, OSC, PM, APC */
155 ESC_ALTCHARSET = 8,
156 ESC_STR_END = 16, /* a final string was encountered */
157 ESC_TEST = 32, /* Enter in test mode */
158 };
159
160 enum window_state {
161 WIN_VISIBLE = 1,
162 WIN_FOCUSED = 2
163 };
164
165 enum selection_mode {
166 SEL_IDLE = 0,
167 SEL_EMPTY = 1,
168 SEL_READY = 2
169 };
170
171 enum selection_type {
172 SEL_REGULAR = 1,
173 SEL_RECTANGULAR = 2
174 };
175
176 enum selection_snap {
177 SNAP_WORD = 1,
178 SNAP_LINE = 2
179 };
180
181 typedef unsigned char uchar;
182 typedef unsigned int uint;
183 typedef unsigned long ulong;
184 typedef unsigned short ushort;
185
186 typedef uint_least32_t Rune;
187
188 typedef XftDraw *Draw;
189 typedef XftColor Color;
190
191 typedef struct {
192 Rune u; /* character code */
193 ushort mode; /* attribute flags */
194 ushort fg; /* foreground */
195 ushort bg; /* background */
196 } Glyph;
197
198 typedef Glyph *Line;
199
200 typedef struct {
201 Glyph attr; /* current char attributes */
202 int x;
203 int y;
204 char state;
205 } TCursor;
206
207 /* CSI Escape sequence structs */
208 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
209 typedef struct {
210 char buf[ESC_BUF_SIZ]; /* raw string */
211 int len; /* raw string length */
212 char priv;
213 int arg[ESC_ARG_SIZ];
214 int narg; /* nb of args */
215 char mode[2];
216 } CSIEscape;
217
218 /* STR Escape sequence structs */
219 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
220 typedef struct {
221 char type; /* ESC type ... */
222 char buf[STR_BUF_SIZ]; /* raw string */
223 int len; /* raw string length */
224 char *args[STR_ARG_SIZ];
225 int narg; /* nb of args */
226 } STREscape;
227
228 /* Internal representation of the screen */
229 typedef struct {
230 int row; /* nb row */
231 int col; /* nb col */
232 Line *line; /* screen */
233 Line *alt; /* alternate screen */
234 bool *dirty; /* dirtyness of lines */
235 XftGlyphFontSpec *specbuf; /* font spec buffer used for rendering */
236 TCursor c; /* cursor */
237 int top; /* top scroll limit */
238 int bot; /* bottom scroll limit */
239 int mode; /* terminal mode flags */
240 int esc; /* escape state flags */
241 char trantbl[4]; /* charset table translation */
242 int charset; /* current charset */
243 int icharset; /* selected charset for sequence */
244 bool numlock; /* lock numbers in keyboard */
245 bool *tabs;
246 } Term;
247
248 /* Purely graphic info */
249 typedef struct {
250 Display *dpy;
251 Colormap cmap;
252 Window win;
253 Drawable buf;
254 Atom xembed, wmdeletewin, netwmname, netwmpid;
255 XIM xim;
256 XIC xic;
257 Draw draw;
258 Visual *vis;
259 XSetWindowAttributes attrs;
260 int scr;
261 bool isfixed; /* is fixed geometry? */
262 int l, t; /* left and top offset */
263 int gm; /* geometry mask */
264 int tw, th; /* tty width and height */
265 int w, h; /* window width and height */
266 int ch; /* char height */
267 int cw; /* char width */
268 char state; /* focus, redraw, visible */
269 int cursor; /* cursor style */
270 } XWindow;
271
272 typedef struct {
273 uint b;
274 uint mask;
275 char *s;
276 } Mousekey;
277
278 typedef struct {
279 KeySym k;
280 uint mask;
281 char *s;
282 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
283 signed char appkey; /* application keypad */
284 signed char appcursor; /* application cursor */
285 signed char crlf; /* crlf mode */
286 } Key;
287
288 typedef struct {
289 int mode;
290 int type;
291 int snap;
292 /*
293 * Selection variables:
294 * nb – normalized coordinates of the beginning of the selection
295 * ne – normalized coordinates of the end of the selection
296 * ob – original coordinates of the beginning of the selection
297 * oe – original coordinates of the end of the selection
298 */
299 struct {
300 int x, y;
301 } nb, ne, ob, oe;
302
303 char *primary, *clipboard;
304 Atom xtarget;
305 bool alt;
306 struct timespec tclick1;
307 struct timespec tclick2;
308 } Selection;
309
310 typedef union {
311 int i;
312 uint ui;
313 float f;
314 const void *v;
315 } Arg;
316
317 typedef struct {
318 uint mod;
319 KeySym keysym;
320 void (*func)(const Arg *);
321 const Arg arg;
322 } Shortcut;
323
324 /* function definitions used in config.h */
325 static void clipcopy(const Arg *);
326 static void clippaste(const Arg *);
327 static void numlock(const Arg *);
328 static void selpaste(const Arg *);
329 static void xzoom(const Arg *);
330 static void xzoomabs(const Arg *);
331 static void xzoomreset(const Arg *);
332 static void printsel(const Arg *);
333 static void printscreen(const Arg *) ;
334 static void toggleprinter(const Arg *);
335
336 /* Config.h for applying patches and the configuration. */
337 #include "config.h"
338
339 /* Font structure */
340 typedef struct {
341 int height;
342 int width;
343 int ascent;
344 int descent;
345 short lbearing;
346 short rbearing;
347 XftFont *match;
348 FcFontSet *set;
349 FcPattern *pattern;
350 } Font;
351
352 /* Drawing Context */
353 typedef struct {
354 Color col[MAX(LEN(colorname), 256)];
355 Font font, bfont, ifont, ibfont;
356 GC gc;
357 } DC;
358
359 static void die(const char *, ...);
360 static void draw(void);
361 static void redraw(void);
362 static void drawregion(int, int, int, int);
363 static void execsh(void);
364 static void stty(void);
365 static void sigchld(int);
366 static void run(void);
367
368 static void csidump(void);
369 static void csihandle(void);
370 static void csiparse(void);
371 static void csireset(void);
372 static int eschandle(uchar);
373 static void strdump(void);
374 static void strhandle(void);
375 static void strparse(void);
376 static void strreset(void);
377
378 static int tattrset(int);
379 static void tprinter(char *, size_t);
380 static void tdumpsel(void);
381 static void tdumpline(int);
382 static void tdump(void);
383 static void tclearregion(int, int, int, int);
384 static void tcursor(int);
385 static void tdeletechar(int);
386 static void tdeleteline(int);
387 static void tinsertblank(int);
388 static void tinsertblankline(int);
389 static int tlinelen(int);
390 static void tmoveto(int, int);
391 static void tmoveato(int, int);
392 static void tnew(int, int);
393 static void tnewline(int);
394 static void tputtab(int);
395 static void tputc(Rune);
396 static void treset(void);
397 static void tresize(int, int);
398 static void tscrollup(int, int);
399 static void tscrolldown(int, int);
400 static void tsetattr(int *, int);
401 static void tsetchar(Rune, Glyph *, int, int);
402 static void tsetscroll(int, int);
403 static void tswapscreen(void);
404 static void tsetdirt(int, int);
405 static void tsetdirtattr(int);
406 static void tsetmode(bool, bool, int *, int);
407 static void tfulldirt(void);
408 static void techo(Rune);
409 static void tcontrolcode(uchar );
410 static void tdectest(char );
411 static int32_t tdefcolor(int *, int *, int);
412 static void tdeftran(char);
413 static inline bool match(uint, uint);
414 static void ttynew(void);
415 static void ttyread(void);
416 static void ttyresize(void);
417 static void ttysend(char *, size_t);
418 static void ttywrite(const char *, size_t);
419 static void tstrsequence(uchar);
420
421 static inline ushort sixd_to_16bit(int);
422 static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
423 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
424 static void xdrawglyph(Glyph, int, int);
425 static void xhints(void);
426 static void xclear(int, int, int, int);
427 static void xdrawcursor(void);
428 static void xinit(void);
429 static void xloadcols(void);
430 static int xsetcolorname(int, const char *);
431 static int xgeommasktogravity(int);
432 static int xloadfont(Font *, FcPattern *);
433 static void xloadfonts(char *, double);
434 static void xsettitle(char *);
435 static void xresettitle(void);
436 static void xsetpointermotion(int);
437 static void xseturgency(int);
438 static void xsetsel(char *, Time);
439 static void xtermclear(int, int, int, int);
440 static void xunloadfont(Font *);
441 static void xunloadfonts(void);
442 static void xresize(int, int);
443
444 static void expose(XEvent *);
445 static void visibility(XEvent *);
446 static void unmap(XEvent *);
447 static char *kmap(KeySym, uint);
448 static void kpress(XEvent *);
449 static void cmessage(XEvent *);
450 static void cresize(int, int);
451 static void resize(XEvent *);
452 static void focus(XEvent *);
453 static void brelease(XEvent *);
454 static void bpress(XEvent *);
455 static void bmotion(XEvent *);
456 static void selnotify(XEvent *);
457 static void selclear(XEvent *);
458 static void selrequest(XEvent *);
459
460 static void selinit(void);
461 static void selnormalize(void);
462 static inline bool selected(int, int);
463 static char *getsel(void);
464 static void selcopy(Time);
465 static void selscroll(int, int);
466 static void selsnap(int *, int *, int);
467 static int x2col(int);
468 static int y2row(int);
469 static void getbuttoninfo(XEvent *);
470 static void mousereport(XEvent *);
471
472 static size_t utf8decode(char *, Rune *, size_t);
473 static Rune utf8decodebyte(char, size_t *);
474 static size_t utf8encode(Rune, char *);
475 static char utf8encodebyte(Rune, size_t);
476 static size_t utf8validate(Rune *, size_t);
477
478 static ssize_t xwrite(int, const char *, size_t);
479 static void *xmalloc(size_t);
480 static void *xrealloc(void *, size_t);
481 static char *xstrdup(char *);
482
483 static void usage(void);
484
485 static void (*handler[LASTEvent])(XEvent *) = {
486 [KeyPress] = kpress,
487 [ClientMessage] = cmessage,
488 [ConfigureNotify] = resize,
489 [VisibilityNotify] = visibility,
490 [UnmapNotify] = unmap,
491 [Expose] = expose,
492 [FocusIn] = focus,
493 [FocusOut] = focus,
494 [MotionNotify] = bmotion,
495 [ButtonPress] = bpress,
496 [ButtonRelease] = brelease,
497 /*
498 * Uncomment if you want the selection to disappear when you select something
499 * different in another window.
500 */
501 /* [SelectionClear] = selclear, */
502 [SelectionNotify] = selnotify,
503 [SelectionRequest] = selrequest,
504 };
505
506 /* Globals */
507 static DC dc;
508 static XWindow xw;
509 static Term term;
510 static CSIEscape csiescseq;
511 static STREscape strescseq;
512 static int cmdfd;
513 static pid_t pid;
514 static Selection sel;
515 static int iofd = STDOUT_FILENO;
516 static char **opt_cmd = NULL;
517 static char *opt_io = NULL;
518 static char *opt_title = NULL;
519 static char *opt_embed = NULL;
520 static char *opt_class = NULL;
521 static char *opt_font = NULL;
522 static char *opt_line = NULL;
523 static int oldbutton = 3; /* button event on startup: 3 = release */
524
525 static char *usedfont = NULL;
526 static double usedfontsize = 0;
527 static double defaultfontsize = 0;
528
529 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
530 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
531 static Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
532 static Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
533
534 /* Font Ring Cache */
535 enum {
536 FRC_NORMAL,
537 FRC_ITALIC,
538 FRC_BOLD,
539 FRC_ITALICBOLD
540 };
541
542 typedef struct {
543 XftFont *font;
544 int flags;
545 Rune unicodep;
546 } Fontcache;
547
548 /* Fontcache is an array now. A new font will be appended to the array. */
549 static Fontcache frc[16];
550 static int frclen = 0;
551
552 ssize_t
553 xwrite(int fd, const char *s, size_t len) {
554 size_t aux = len;
555
556 while(len > 0) {
557 ssize_t r = write(fd, s, len);
558 if(r < 0)
559 return r;
560 len -= r;
561 s += r;
562 }
563 return aux;
564 }
565
566 void *
567 xmalloc(size_t len) {
568 void *p = malloc(len);
569
570 if(!p)
571 die("Out of memory\n");
572
573 return p;
574 }
575
576 void *
577 xrealloc(void *p, size_t len) {
578 if((p = realloc(p, len)) == NULL)
579 die("Out of memory\n");
580
581 return p;
582 }
583
584 char *
585 xstrdup(char *s) {
586 if((s = strdup(s)) == NULL)
587 die("Out of memory\n");
588
589 return s;
590 }
591
592 size_t
593 utf8decode(char *c, Rune *u, size_t clen) {
594 size_t i, j, len, type;
595 Rune udecoded;
596
597 *u = UTF_INVALID;
598 if(!clen)
599 return 0;
600 udecoded = utf8decodebyte(c[0], &len);
601 if(!BETWEEN(len, 1, UTF_SIZ))
602 return 1;
603 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
604 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
605 if(type != 0)
606 return j;
607 }
608 if(j < len)
609 return 0;
610 *u = udecoded;
611 utf8validate(u, len);
612 return len;
613 }
614
615 Rune
616 utf8decodebyte(char c, size_t *i) {
617 for(*i = 0; *i < LEN(utfmask); ++(*i))
618 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
619 return (uchar)c & ~utfmask[*i];
620 return 0;
621 }
622
623 size_t
624 utf8encode(Rune u, char *c) {
625 size_t len, i;
626
627 len = utf8validate(&u, 0);
628 if(len > UTF_SIZ)
629 return 0;
630 for(i = len - 1; i != 0; --i) {
631 c[i] = utf8encodebyte(u, 0);
632 u >>= 6;
633 }
634 c[0] = utf8encodebyte(u, len);
635 return len;
636 }
637
638 char
639 utf8encodebyte(Rune u, size_t i) {
640 return utfbyte[i] | (u & ~utfmask[i]);
641 }
642
643 size_t
644 utf8validate(Rune *u, size_t i) {
645 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
646 *u = UTF_INVALID;
647 for(i = 1; *u > utfmax[i]; ++i)
648 ;
649 return i;
650 }
651
652 void
653 selinit(void) {
654 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
655 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
656 sel.mode = SEL_IDLE;
657 sel.ob.x = -1;
658 sel.primary = NULL;
659 sel.clipboard = NULL;
660 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
661 if(sel.xtarget == None)
662 sel.xtarget = XA_STRING;
663 }
664
665 int
666 x2col(int x) {
667 x -= borderpx;
668 x /= xw.cw;
669
670 return LIMIT(x, 0, term.col-1);
671 }
672
673 int
674 y2row(int y) {
675 y -= borderpx;
676 y /= xw.ch;
677
678 return LIMIT(y, 0, term.row-1);
679 }
680
681 int
682 tlinelen(int y) {
683 int i = term.col;
684
685 if(term.line[y][i - 1].mode & ATTR_WRAP)
686 return i;
687
688 while(i > 0 && term.line[y][i - 1].u == ' ')
689 --i;
690
691 return i;
692 }
693
694 void
695 selnormalize(void) {
696 int i;
697
698 if(sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
699 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
700 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
701 } else {
702 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
703 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
704 }
705 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
706 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
707
708 selsnap(&sel.nb.x, &sel.nb.y, -1);
709 selsnap(&sel.ne.x, &sel.ne.y, +1);
710
711 /* expand selection over line breaks */
712 if (sel.type == SEL_RECTANGULAR)
713 return;
714 i = tlinelen(sel.nb.y);
715 if (i < sel.nb.x)
716 sel.nb.x = i;
717 if (tlinelen(sel.ne.y) <= sel.ne.x)
718 sel.ne.x = term.col - 1;
719 }
720
721 bool
722 selected(int x, int y) {
723 if(sel.mode == SEL_EMPTY)
724 return false;
725
726 if(sel.type == SEL_RECTANGULAR)
727 return BETWEEN(y, sel.nb.y, sel.ne.y)
728 && BETWEEN(x, sel.nb.x, sel.ne.x);
729
730 return BETWEEN(y, sel.nb.y, sel.ne.y)
731 && (y != sel.nb.y || x >= sel.nb.x)
732 && (y != sel.ne.y || x <= sel.ne.x);
733 }
734
735 void
736 selsnap(int *x, int *y, int direction) {
737 int newx, newy, xt, yt;
738 bool delim, prevdelim;
739 Glyph *gp, *prevgp;
740
741 switch(sel.snap) {
742 case SNAP_WORD:
743 /*
744 * Snap around if the word wraps around at the end or
745 * beginning of a line.
746 */
747 prevgp = &term.line[*y][*x];
748 prevdelim = ISDELIM(prevgp->u);
749 for(;;) {
750 newx = *x + direction;
751 newy = *y;
752 if(!BETWEEN(newx, 0, term.col - 1)) {
753 newy += direction;
754 newx = (newx + term.col) % term.col;
755 if (!BETWEEN(newy, 0, term.row - 1))
756 break;
757
758 if(direction > 0)
759 yt = *y, xt = *x;
760 else
761 yt = newy, xt = newx;
762 if(!(term.line[yt][xt].mode & ATTR_WRAP))
763 break;
764 }
765
766 if (newx >= tlinelen(newy))
767 break;
768
769 gp = &term.line[newy][newx];
770 delim = ISDELIM(gp->u);
771 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
772 || (delim && gp->u != prevgp->u)))
773 break;
774
775 *x = newx;
776 *y = newy;
777 prevgp = gp;
778 prevdelim = delim;
779 }
780 break;
781 case SNAP_LINE:
782 /*
783 * Snap around if the the previous line or the current one
784 * has set ATTR_WRAP at its end. Then the whole next or
785 * previous line will be selected.
786 */
787 *x = (direction < 0) ? 0 : term.col - 1;
788 if(direction < 0) {
789 for(; *y > 0; *y += direction) {
790 if(!(term.line[*y-1][term.col-1].mode
791 & ATTR_WRAP)) {
792 break;
793 }
794 }
795 } else if(direction > 0) {
796 for(; *y < term.row-1; *y += direction) {
797 if(!(term.line[*y][term.col-1].mode
798 & ATTR_WRAP)) {
799 break;
800 }
801 }
802 }
803 break;
804 }
805 }
806
807 void
808 getbuttoninfo(XEvent *e) {
809 int type;
810 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
811
812 sel.alt = IS_SET(MODE_ALTSCREEN);
813
814 sel.oe.x = x2col(e->xbutton.x);
815 sel.oe.y = y2row(e->xbutton.y);
816 selnormalize();
817
818 sel.type = SEL_REGULAR;
819 for(type = 1; type < LEN(selmasks); ++type) {
820 if(match(selmasks[type], state)) {
821 sel.type = type;
822 break;
823 }
824 }
825 }
826
827 void
828 mousereport(XEvent *e) {
829 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
830 button = e->xbutton.button, state = e->xbutton.state,
831 len;
832 char buf[40];
833 static int ox, oy;
834
835 /* from urxvt */
836 if(e->xbutton.type == MotionNotify) {
837 if(x == ox && y == oy)
838 return;
839 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
840 return;
841 /* MOUSE_MOTION: no reporting if no button is pressed */
842 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
843 return;
844
845 button = oldbutton + 32;
846 ox = x;
847 oy = y;
848 } else {
849 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
850 button = 3;
851 } else {
852 button -= Button1;
853 if(button >= 3)
854 button += 64 - 3;
855 }
856 if(e->xbutton.type == ButtonPress) {
857 oldbutton = button;
858 ox = x;
859 oy = y;
860 } else if(e->xbutton.type == ButtonRelease) {
861 oldbutton = 3;
862 /* MODE_MOUSEX10: no button release reporting */
863 if(IS_SET(MODE_MOUSEX10))
864 return;
865 if (button == 64 || button == 65)
866 return;
867 }
868 }
869
870 if(!IS_SET(MODE_MOUSEX10)) {
871 button += ((state & ShiftMask ) ? 4 : 0)
872 + ((state & Mod4Mask ) ? 8 : 0)
873 + ((state & ControlMask) ? 16 : 0);
874 }
875
876 if(IS_SET(MODE_MOUSESGR)) {
877 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
878 button, x+1, y+1,
879 e->xbutton.type == ButtonRelease ? 'm' : 'M');
880 } else if(x < 223 && y < 223) {
881 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
882 32+button, 32+x+1, 32+y+1);
883 } else {
884 return;
885 }
886
887 ttywrite(buf, len);
888 }
889
890 void
891 bpress(XEvent *e) {
892 struct timespec now;
893 Mousekey *mk;
894
895 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
896 mousereport(e);
897 return;
898 }
899
900 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
901 if(e->xbutton.button == mk->b
902 && match(mk->mask, e->xbutton.state)) {
903 ttysend(mk->s, strlen(mk->s));
904 return;
905 }
906 }
907
908 if(e->xbutton.button == Button1) {
909 clock_gettime(CLOCK_MONOTONIC, &now);
910
911 /* Clear previous selection, logically and visually. */
912 selclear(NULL);
913 sel.mode = SEL_EMPTY;
914 sel.type = SEL_REGULAR;
915 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
916 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
917
918 /*
919 * If the user clicks below predefined timeouts specific
920 * snapping behaviour is exposed.
921 */
922 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
923 sel.snap = SNAP_LINE;
924 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
925 sel.snap = SNAP_WORD;
926 } else {
927 sel.snap = 0;
928 }
929 selnormalize();
930
931 if(sel.snap != 0)
932 sel.mode = SEL_READY;
933 tsetdirt(sel.nb.y, sel.ne.y);
934 sel.tclick2 = sel.tclick1;
935 sel.tclick1 = now;
936 }
937 }
938
939 char *
940 getsel(void) {
941 char *str, *ptr;
942 int y, bufsize, lastx, linelen;
943 Glyph *gp, *last;
944
945 if(sel.ob.x == -1)
946 return NULL;
947
948 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
949 ptr = str = xmalloc(bufsize);
950
951 /* append every set & selected glyph to the selection */
952 for(y = sel.nb.y; y <= sel.ne.y; y++) {
953 linelen = tlinelen(y);
954
955 if(sel.type == SEL_RECTANGULAR) {
956 gp = &term.line[y][sel.nb.x];
957 lastx = sel.ne.x;
958 } else {
959 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
960 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
961 }
962 last = &term.line[y][MIN(lastx, linelen-1)];
963 while(last >= gp && last->u == ' ')
964 --last;
965
966 for( ; gp <= last; ++gp) {
967 if(gp->mode & ATTR_WDUMMY)
968 continue;
969
970 ptr += utf8encode(gp->u, ptr);
971 }
972
973 /*
974 * Copy and pasting of line endings is inconsistent
975 * in the inconsistent terminal and GUI world.
976 * The best solution seems like to produce '\n' when
977 * something is copied from st and convert '\n' to
978 * '\r', when something to be pasted is received by
979 * st.
980 * FIXME: Fix the computer world.
981 */
982 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
983 *ptr++ = '\n';
984 }
985 *ptr = 0;
986 return str;
987 }
988
989 void
990 selcopy(Time t) {
991 xsetsel(getsel(), t);
992 }
993
994 void
995 selnotify(XEvent *e) {
996 ulong nitems, ofs, rem;
997 int format;
998 uchar *data, *last, *repl;
999 Atom type;
1000 XSelectionEvent *xsev;
1001
1002 ofs = 0;
1003 xsev = &e->xselection;
1004 if (xsev->property == None)
1005 return;
1006 do {
1007 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1008 BUFSIZ/4, False, AnyPropertyType,
1009 &type, &format, &nitems, &rem,
1010 &data)) {
1011 fprintf(stderr, "Clipboard allocation failed\n");
1012 return;
1013 }
1014
1015 /*
1016 * As seen in getsel:
1017 * Line endings are inconsistent in the terminal and GUI world
1018 * copy and pasting. When receiving some selection data,
1019 * replace all '\n' with '\r'.
1020 * FIXME: Fix the computer world.
1021 */
1022 repl = data;
1023 last = data + nitems * format / 8;
1024 while((repl = memchr(repl, '\n', last - repl))) {
1025 *repl++ = '\r';
1026 }
1027
1028 if(IS_SET(MODE_BRCKTPASTE))
1029 ttywrite("\033[200~", 6);
1030 ttysend((char *)data, nitems * format / 8);
1031 if(IS_SET(MODE_BRCKTPASTE))
1032 ttywrite("\033[201~", 6);
1033 XFree(data);
1034 /* number of 32-bit chunks returned */
1035 ofs += nitems * format / 32;
1036 } while(rem > 0);
1037 }
1038
1039 void
1040 selpaste(const Arg *dummy) {
1041 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1042 xw.win, CurrentTime);
1043 }
1044
1045 void
1046 clipcopy(const Arg *dummy) {
1047 Atom clipboard;
1048
1049 if(sel.clipboard != NULL)
1050 free(sel.clipboard);
1051
1052 if(sel.primary != NULL) {
1053 sel.clipboard = xstrdup(sel.primary);
1054 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1055 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1056 }
1057 }
1058
1059 void
1060 clippaste(const Arg *dummy) {
1061 Atom clipboard;
1062
1063 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1064 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1065 xw.win, CurrentTime);
1066 }
1067
1068 void
1069 selclear(XEvent *e) {
1070 if(sel.ob.x == -1)
1071 return;
1072 sel.mode = SEL_IDLE;
1073 sel.ob.x = -1;
1074 tsetdirt(sel.nb.y, sel.ne.y);
1075 }
1076
1077 void
1078 selrequest(XEvent *e) {
1079 XSelectionRequestEvent *xsre;
1080 XSelectionEvent xev;
1081 Atom xa_targets, string, clipboard;
1082 char *seltext;
1083
1084 xsre = (XSelectionRequestEvent *) e;
1085 xev.type = SelectionNotify;
1086 xev.requestor = xsre->requestor;
1087 xev.selection = xsre->selection;
1088 xev.target = xsre->target;
1089 xev.time = xsre->time;
1090 if (xsre->property == None)
1091 xsre->property = xsre->target;
1092
1093 /* reject */
1094 xev.property = None;
1095
1096 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1097 if(xsre->target == xa_targets) {
1098 /* respond with the supported type */
1099 string = sel.xtarget;
1100 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1101 XA_ATOM, 32, PropModeReplace,
1102 (uchar *) &string, 1);
1103 xev.property = xsre->property;
1104 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1105 /*
1106 * xith XA_STRING non ascii characters may be incorrect in the
1107 * requestor. It is not our problem, use utf8.
1108 */
1109 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1110 if(xsre->selection == XA_PRIMARY) {
1111 seltext = sel.primary;
1112 } else if(xsre->selection == clipboard) {
1113 seltext = sel.clipboard;
1114 } else {
1115 fprintf(stderr,
1116 "Unhandled clipboard selection 0x%lx\n",
1117 xsre->selection);
1118 return;
1119 }
1120 if(seltext != NULL) {
1121 XChangeProperty(xsre->display, xsre->requestor,
1122 xsre->property, xsre->target,
1123 8, PropModeReplace,
1124 (uchar *)seltext, strlen(seltext));
1125 xev.property = xsre->property;
1126 }
1127 }
1128
1129 /* all done, send a notification to the listener */
1130 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1131 fprintf(stderr, "Error sending SelectionNotify event\n");
1132 }
1133
1134 void
1135 xsetsel(char *str, Time t) {
1136 free(sel.primary);
1137 sel.primary = str;
1138
1139 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1140 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1141 selclear(0);
1142 }
1143
1144 void
1145 brelease(XEvent *e) {
1146 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1147 mousereport(e);
1148 return;
1149 }
1150
1151 if(e->xbutton.button == Button2) {
1152 selpaste(NULL);
1153 } else if(e->xbutton.button == Button1) {
1154 if(sel.mode == SEL_READY) {
1155 getbuttoninfo(e);
1156 selcopy(e->xbutton.time);
1157 } else
1158 selclear(NULL);
1159 sel.mode = SEL_IDLE;
1160 tsetdirt(sel.nb.y, sel.ne.y);
1161 }
1162 }
1163
1164 void
1165 bmotion(XEvent *e) {
1166 int oldey, oldex, oldsby, oldsey;
1167
1168 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1169 mousereport(e);
1170 return;
1171 }
1172
1173 if(!sel.mode)
1174 return;
1175
1176 sel.mode = SEL_READY;
1177 oldey = sel.oe.y;
1178 oldex = sel.oe.x;
1179 oldsby = sel.nb.y;
1180 oldsey = sel.ne.y;
1181 getbuttoninfo(e);
1182
1183 if(oldey != sel.oe.y || oldex != sel.oe.x)
1184 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1185 }
1186
1187 void
1188 die(const char *errstr, ...) {
1189 va_list ap;
1190
1191 va_start(ap, errstr);
1192 vfprintf(stderr, errstr, ap);
1193 va_end(ap);
1194 exit(EXIT_FAILURE);
1195 }
1196
1197 void
1198 execsh(void) {
1199 char **args, *sh, *prog;
1200 const struct passwd *pw;
1201 char buf[sizeof(long) * 8 + 1];
1202
1203 errno = 0;
1204 if((pw = getpwuid(getuid())) == NULL) {
1205 if(errno)
1206 die("getpwuid:%s\n", strerror(errno));
1207 else
1208 die("who are you?\n");
1209 }
1210
1211 if (!(sh = getenv("SHELL"))) {
1212 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1213 }
1214
1215 if(opt_cmd)
1216 prog = opt_cmd[0];
1217 else if(utmp)
1218 prog = utmp;
1219 else
1220 prog = sh;
1221 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1222
1223 snprintf(buf, sizeof(buf), "%lu", xw.win);
1224
1225 unsetenv("COLUMNS");
1226 unsetenv("LINES");
1227 unsetenv("TERMCAP");
1228 setenv("LOGNAME", pw->pw_name, 1);
1229 setenv("USER", pw->pw_name, 1);
1230 setenv("SHELL", sh, 1);
1231 setenv("HOME", pw->pw_dir, 1);
1232 setenv("TERM", termname, 1);
1233 setenv("WINDOWID", buf, 1);
1234
1235 signal(SIGCHLD, SIG_DFL);
1236 signal(SIGHUP, SIG_DFL);
1237 signal(SIGINT, SIG_DFL);
1238 signal(SIGQUIT, SIG_DFL);
1239 signal(SIGTERM, SIG_DFL);
1240 signal(SIGALRM, SIG_DFL);
1241
1242 execvp(prog, args);
1243 _exit(EXIT_FAILURE);
1244 }
1245
1246 void
1247 sigchld(int a) {
1248 int stat, ret;
1249 pid_t p;
1250
1251 if((p = waitpid(pid, &stat, WNOHANG)) < 0)
1252 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1253
1254 if(pid != p)
1255 return;
1256
1257 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1258 if (ret != EXIT_SUCCESS)
1259 die("child finished with error '%d'\n", stat);
1260 exit(EXIT_SUCCESS);
1261 }
1262
1263
1264 void
1265 stty(void)
1266 {
1267 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1268 size_t n, siz;
1269
1270 if((n = strlen(stty_args)) > sizeof(cmd)-1)
1271 die("incorrect stty parameters\n");
1272 memcpy(cmd, stty_args, n);
1273 q = cmd + n;
1274 siz = sizeof(cmd) - n;
1275 for(p = opt_cmd; p && (s = *p); ++p) {
1276 if((n = strlen(s)) > siz-1)
1277 die("stty parameter length too long\n");
1278 *q++ = ' ';
1279 q = memcpy(q, s, n);
1280 q += n;
1281 siz-= n + 1;
1282 }
1283 *q = '\0';
1284 if (system(cmd) != 0)
1285 perror("Couldn't call stty");
1286 }
1287
1288 void
1289 ttynew(void) {
1290 int m, s;
1291 struct winsize w = {term.row, term.col, 0, 0};
1292
1293 if(opt_io) {
1294 term.mode |= MODE_PRINT;
1295 iofd = (!strcmp(opt_io, "-")) ?
1296 STDOUT_FILENO :
1297 open(opt_io, O_WRONLY | O_CREAT, 0666);
1298 if(iofd < 0) {
1299 fprintf(stderr, "Error opening %s:%s\n",
1300 opt_io, strerror(errno));
1301 }
1302 }
1303
1304 if (opt_line) {
1305 if((cmdfd = open(opt_line, O_RDWR)) < 0)
1306 die("open line failed: %s\n", strerror(errno));
1307 close(STDIN_FILENO);
1308 dup(cmdfd);
1309 stty();
1310 return;
1311 }
1312
1313 /* seems to work fine on linux, openbsd and freebsd */
1314 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1315 die("openpty failed: %s\n", strerror(errno));
1316
1317 switch(pid = fork()) {
1318 case -1:
1319 die("fork failed\n");
1320 break;
1321 case 0:
1322 close(iofd);
1323 setsid(); /* create a new process group */
1324 dup2(s, STDIN_FILENO);
1325 dup2(s, STDOUT_FILENO);
1326 dup2(s, STDERR_FILENO);
1327 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1328 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1329 close(s);
1330 close(m);
1331 execsh();
1332 break;
1333 default:
1334 close(s);
1335 cmdfd = m;
1336 signal(SIGCHLD, sigchld);
1337 break;
1338 }
1339 }
1340
1341 void
1342 ttyread(void) {
1343 static char buf[BUFSIZ];
1344 static int buflen = 0;
1345 char *ptr;
1346 int charsize; /* size of utf8 char in bytes */
1347 Rune unicodep;
1348 int ret;
1349
1350 /* append read bytes to unprocessed bytes */
1351 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1352 die("Couldn't read from shell: %s\n", strerror(errno));
1353
1354 /* process every complete utf8 char */
1355 buflen += ret;
1356 ptr = buf;
1357 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1358 tputc(unicodep);
1359 ptr += charsize;
1360 buflen -= charsize;
1361 }
1362
1363 /* keep any uncomplete utf8 char for the next call */
1364 memmove(buf, ptr, buflen);
1365 }
1366
1367 void
1368 ttywrite(const char *s, size_t n) {
1369 if(xwrite(cmdfd, s, n) == -1)
1370 die("write error on tty: %s\n", strerror(errno));
1371 }
1372
1373 void
1374 ttysend(char *s, size_t n) {
1375 int len;
1376 Rune u;
1377
1378 ttywrite(s, n);
1379 if(IS_SET(MODE_ECHO))
1380 while((len = utf8decode(s, &u, n)) > 0) {
1381 techo(u);
1382 n -= len;
1383 s += len;
1384 }
1385 }
1386
1387 void
1388 ttyresize(void) {
1389 struct winsize w;
1390
1391 w.ws_row = term.row;
1392 w.ws_col = term.col;
1393 w.ws_xpixel = xw.tw;
1394 w.ws_ypixel = xw.th;
1395 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1396 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1397 }
1398
1399 int
1400 tattrset(int attr) {
1401 int i, j;
1402
1403 for(i = 0; i < term.row-1; i++) {
1404 for(j = 0; j < term.col-1; j++) {
1405 if(term.line[i][j].mode & attr)
1406 return 1;
1407 }
1408 }
1409
1410 return 0;
1411 }
1412
1413 void
1414 tsetdirt(int top, int bot) {
1415 int i;
1416
1417 LIMIT(top, 0, term.row-1);
1418 LIMIT(bot, 0, term.row-1);
1419
1420 for(i = top; i <= bot; i++)
1421 term.dirty[i] = 1;
1422 }
1423
1424 void
1425 tsetdirtattr(int attr) {
1426 int i, j;
1427
1428 for(i = 0; i < term.row-1; i++) {
1429 for(j = 0; j < term.col-1; j++) {
1430 if(term.line[i][j].mode & attr) {
1431 tsetdirt(i, i);
1432 break;
1433 }
1434 }
1435 }
1436 }
1437
1438 void
1439 tfulldirt(void) {
1440 tsetdirt(0, term.row-1);
1441 }
1442
1443 void
1444 tcursor(int mode) {
1445 static TCursor c[2];
1446 bool alt = IS_SET(MODE_ALTSCREEN);
1447
1448 if(mode == CURSOR_SAVE) {
1449 c[alt] = term.c;
1450 } else if(mode == CURSOR_LOAD) {
1451 term.c = c[alt];
1452 tmoveto(c[alt].x, c[alt].y);
1453 }
1454 }
1455
1456 void
1457 treset(void) {
1458 uint i;
1459
1460 term.c = (TCursor){{
1461 .mode = ATTR_NULL,
1462 .fg = defaultfg,
1463 .bg = defaultbg
1464 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1465
1466 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1467 for(i = tabspaces; i < term.col; i += tabspaces)
1468 term.tabs[i] = 1;
1469 term.top = 0;
1470 term.bot = term.row - 1;
1471 term.mode = MODE_WRAP;
1472 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1473 term.charset = 0;
1474
1475 for(i = 0; i < 2; i++) {
1476 tmoveto(0, 0);
1477 tcursor(CURSOR_SAVE);
1478 tclearregion(0, 0, term.col-1, term.row-1);
1479 tswapscreen();
1480 }
1481 }
1482
1483 void
1484 tnew(int col, int row) {
1485 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1486 tresize(col, row);
1487 term.numlock = 1;
1488
1489 treset();
1490 }
1491
1492 void
1493 tswapscreen(void) {
1494 Line *tmp = term.line;
1495
1496 term.line = term.alt;
1497 term.alt = tmp;
1498 term.mode ^= MODE_ALTSCREEN;
1499 tfulldirt();
1500 }
1501
1502 void
1503 tscrolldown(int orig, int n) {
1504 int i;
1505 Line temp;
1506
1507 LIMIT(n, 0, term.bot-orig+1);
1508
1509 tsetdirt(orig, term.bot-n);
1510 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1511
1512 for(i = term.bot; i >= orig+n; i--) {
1513 temp = term.line[i];
1514 term.line[i] = term.line[i-n];
1515 term.line[i-n] = temp;
1516 }
1517
1518 selscroll(orig, n);
1519 }
1520
1521 void
1522 tscrollup(int orig, int n) {
1523 int i;
1524 Line temp;
1525
1526 LIMIT(n, 0, term.bot-orig+1);
1527
1528 tclearregion(0, orig, term.col-1, orig+n-1);
1529 tsetdirt(orig+n, term.bot);
1530
1531 for(i = orig; i <= term.bot-n; i++) {
1532 temp = term.line[i];
1533 term.line[i] = term.line[i+n];
1534 term.line[i+n] = temp;
1535 }
1536
1537 selscroll(orig, -n);
1538 }
1539
1540 void
1541 selscroll(int orig, int n) {
1542 if(sel.ob.x == -1)
1543 return;
1544
1545 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1546 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1547 selclear(NULL);
1548 return;
1549 }
1550 if(sel.type == SEL_RECTANGULAR) {
1551 if(sel.ob.y < term.top)
1552 sel.ob.y = term.top;
1553 if(sel.oe.y > term.bot)
1554 sel.oe.y = term.bot;
1555 } else {
1556 if(sel.ob.y < term.top) {
1557 sel.ob.y = term.top;
1558 sel.ob.x = 0;
1559 }
1560 if(sel.oe.y > term.bot) {
1561 sel.oe.y = term.bot;
1562 sel.oe.x = term.col;
1563 }
1564 }
1565 selnormalize();
1566 }
1567 }
1568
1569 void
1570 tnewline(int first_col) {
1571 int y = term.c.y;
1572
1573 if(y == term.bot) {
1574 tscrollup(term.top, 1);
1575 } else {
1576 y++;
1577 }
1578 tmoveto(first_col ? 0 : term.c.x, y);
1579 }
1580
1581 void
1582 csiparse(void) {
1583 char *p = csiescseq.buf, *np;
1584 long int v;
1585
1586 csiescseq.narg = 0;
1587 if(*p == '?') {
1588 csiescseq.priv = 1;
1589 p++;
1590 }
1591
1592 csiescseq.buf[csiescseq.len] = '\0';
1593 while(p < csiescseq.buf+csiescseq.len) {
1594 np = NULL;
1595 v = strtol(p, &np, 10);
1596 if(np == p)
1597 v = 0;
1598 if(v == LONG_MAX || v == LONG_MIN)
1599 v = -1;
1600 csiescseq.arg[csiescseq.narg++] = v;
1601 p = np;
1602 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1603 break;
1604 p++;
1605 }
1606 csiescseq.mode[0] = *p++;
1607 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1608 }
1609
1610 /* for absolute user moves, when decom is set */
1611 void
1612 tmoveato(int x, int y) {
1613 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1614 }
1615
1616 void
1617 tmoveto(int x, int y) {
1618 int miny, maxy;
1619
1620 if(term.c.state & CURSOR_ORIGIN) {
1621 miny = term.top;
1622 maxy = term.bot;
1623 } else {
1624 miny = 0;
1625 maxy = term.row - 1;
1626 }
1627 term.c.state &= ~CURSOR_WRAPNEXT;
1628 term.c.x = LIMIT(x, 0, term.col-1);
1629 term.c.y = LIMIT(y, miny, maxy);
1630 }
1631
1632 void
1633 tsetchar(Rune u, Glyph *attr, int x, int y) {
1634 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1635 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1636 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1637 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1638 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1639 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1640 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1641 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1642 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1643 };
1644
1645 /*
1646 * The table is proudly stolen from rxvt.
1647 */
1648 if(term.trantbl[term.charset] == CS_GRAPHIC0 &&
1649 BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
1650 utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
1651
1652 if(term.line[y][x].mode & ATTR_WIDE) {
1653 if(x+1 < term.col) {
1654 term.line[y][x+1].u = ' ';
1655 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1656 }
1657 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1658 term.line[y][x-1].u = ' ';
1659 term.line[y][x-1].mode &= ~ATTR_WIDE;
1660 }
1661
1662 term.dirty[y] = 1;
1663 term.line[y][x] = *attr;
1664 term.line[y][x].u = u;
1665 }
1666
1667 void
1668 tclearregion(int x1, int y1, int x2, int y2) {
1669 int x, y, temp;
1670 Glyph *gp;
1671
1672 if(x1 > x2)
1673 temp = x1, x1 = x2, x2 = temp;
1674 if(y1 > y2)
1675 temp = y1, y1 = y2, y2 = temp;
1676
1677 LIMIT(x1, 0, term.col-1);
1678 LIMIT(x2, 0, term.col-1);
1679 LIMIT(y1, 0, term.row-1);
1680 LIMIT(y2, 0, term.row-1);
1681
1682 for(y = y1; y <= y2; y++) {
1683 term.dirty[y] = 1;
1684 for(x = x1; x <= x2; x++) {
1685 gp = &term.line[y][x];
1686 if(selected(x, y))
1687 selclear(NULL);
1688 gp->fg = term.c.attr.fg;
1689 gp->bg = term.c.attr.bg;
1690 gp->mode = 0;
1691 gp->u = ' ';
1692 }
1693 }
1694 }
1695
1696 void
1697 tdeletechar(int n) {
1698 int dst, src, size;
1699 Glyph *line;
1700
1701 LIMIT(n, 0, term.col - term.c.x);
1702
1703 dst = term.c.x;
1704 src = term.c.x + n;
1705 size = term.col - src;
1706 line = term.line[term.c.y];
1707
1708 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1709 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1710 }
1711
1712 void
1713 tinsertblank(int n) {
1714 int dst, src, size;
1715 Glyph *line;
1716
1717 LIMIT(n, 0, term.col - term.c.x);
1718
1719 dst = term.c.x + n;
1720 src = term.c.x;
1721 size = term.col - dst;
1722 line = term.line[term.c.y];
1723
1724 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1725 tclearregion(src, term.c.y, dst - 1, term.c.y);
1726 }
1727
1728 void
1729 tinsertblankline(int n) {
1730 if(BETWEEN(term.c.y, term.top, term.bot))
1731 tscrolldown(term.c.y, n);
1732 }
1733
1734 void
1735 tdeleteline(int n) {
1736 if(BETWEEN(term.c.y, term.top, term.bot))
1737 tscrollup(term.c.y, n);
1738 }
1739
1740 int32_t
1741 tdefcolor(int *attr, int *npar, int l) {
1742 int32_t idx = -1;
1743 uint r, g, b;
1744
1745 switch (attr[*npar + 1]) {
1746 case 2: /* direct color in RGB space */
1747 if (*npar + 4 >= l) {
1748 fprintf(stderr,
1749 "erresc(38): Incorrect number of parameters (%d)\n",
1750 *npar);
1751 break;
1752 }
1753 r = attr[*npar + 2];
1754 g = attr[*npar + 3];
1755 b = attr[*npar + 4];
1756 *npar += 4;
1757 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1758 fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
1759 r, g, b);
1760 else
1761 idx = TRUECOLOR(r, g, b);
1762 break;
1763 case 5: /* indexed color */
1764 if (*npar + 2 >= l) {
1765 fprintf(stderr,
1766 "erresc(38): Incorrect number of parameters (%d)\n",
1767 *npar);
1768 break;
1769 }
1770 *npar += 2;
1771 if(!BETWEEN(attr[*npar], 0, 255))
1772 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1773 else
1774 idx = attr[*npar];
1775 break;
1776 case 0: /* implemented defined (only foreground) */
1777 case 1: /* transparent */
1778 case 3: /* direct color in CMY space */
1779 case 4: /* direct color in CMYK space */
1780 default:
1781 fprintf(stderr,
1782 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1783 break;
1784 }
1785
1786 return idx;
1787 }
1788
1789 void
1790 tsetattr(int *attr, int l) {
1791 int i;
1792 int32_t idx;
1793
1794 for(i = 0; i < l; i++) {
1795 switch(attr[i]) {
1796 case 0:
1797 term.c.attr.mode &= ~(
1798 ATTR_BOLD |
1799 ATTR_FAINT |
1800 ATTR_ITALIC |
1801 ATTR_UNDERLINE |
1802 ATTR_BLINK |
1803 ATTR_REVERSE |
1804 ATTR_INVISIBLE |
1805 ATTR_STRUCK );
1806 term.c.attr.fg = defaultfg;
1807 term.c.attr.bg = defaultbg;
1808 break;
1809 case 1:
1810 term.c.attr.mode |= ATTR_BOLD;
1811 break;
1812 case 2:
1813 term.c.attr.mode |= ATTR_FAINT;
1814 break;
1815 case 3:
1816 term.c.attr.mode |= ATTR_ITALIC;
1817 break;
1818 case 4:
1819 term.c.attr.mode |= ATTR_UNDERLINE;
1820 break;
1821 case 5: /* slow blink */
1822 /* FALLTHROUGH */
1823 case 6: /* rapid blink */
1824 term.c.attr.mode |= ATTR_BLINK;
1825 break;
1826 case 7:
1827 term.c.attr.mode |= ATTR_REVERSE;
1828 break;
1829 case 8:
1830 term.c.attr.mode |= ATTR_INVISIBLE;
1831 break;
1832 case 9:
1833 term.c.attr.mode |= ATTR_STRUCK;
1834 break;
1835 case 22:
1836 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1837 break;
1838 case 23:
1839 term.c.attr.mode &= ~ATTR_ITALIC;
1840 break;
1841 case 24:
1842 term.c.attr.mode &= ~ATTR_UNDERLINE;
1843 break;
1844 case 25:
1845 term.c.attr.mode &= ~ATTR_BLINK;
1846 break;
1847 case 27:
1848 term.c.attr.mode &= ~ATTR_REVERSE;
1849 break;
1850 case 28:
1851 term.c.attr.mode &= ~ATTR_INVISIBLE;
1852 break;
1853 case 29:
1854 term.c.attr.mode &= ~ATTR_STRUCK;
1855 break;
1856 case 38:
1857 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1858 term.c.attr.fg = idx;
1859 break;
1860 case 39:
1861 term.c.attr.fg = defaultfg;
1862 break;
1863 case 48:
1864 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1865 term.c.attr.bg = idx;
1866 break;
1867 case 49:
1868 term.c.attr.bg = defaultbg;
1869 break;
1870 default:
1871 if(BETWEEN(attr[i], 30, 37)) {
1872 term.c.attr.fg = attr[i] - 30;
1873 } else if(BETWEEN(attr[i], 40, 47)) {
1874 term.c.attr.bg = attr[i] - 40;
1875 } else if(BETWEEN(attr[i], 90, 97)) {
1876 term.c.attr.fg = attr[i] - 90 + 8;
1877 } else if(BETWEEN(attr[i], 100, 107)) {
1878 term.c.attr.bg = attr[i] - 100 + 8;
1879 } else {
1880 fprintf(stderr,
1881 "erresc(default): gfx attr %d unknown\n",
1882 attr[i]), csidump();
1883 }
1884 break;
1885 }
1886 }
1887 }
1888
1889 void
1890 tsetscroll(int t, int b) {
1891 int temp;
1892
1893 LIMIT(t, 0, term.row-1);
1894 LIMIT(b, 0, term.row-1);
1895 if(t > b) {
1896 temp = t;
1897 t = b;
1898 b = temp;
1899 }
1900 term.top = t;
1901 term.bot = b;
1902 }
1903
1904 void
1905 tsetmode(bool priv, bool set, int *args, int narg) {
1906 int *lim, mode;
1907 bool alt;
1908
1909 for(lim = args + narg; args < lim; ++args) {
1910 if(priv) {
1911 switch(*args) {
1912 case 1: /* DECCKM -- Cursor key */
1913 MODBIT(term.mode, set, MODE_APPCURSOR);
1914 break;
1915 case 5: /* DECSCNM -- Reverse video */
1916 mode = term.mode;
1917 MODBIT(term.mode, set, MODE_REVERSE);
1918 if(mode != term.mode)
1919 redraw();
1920 break;
1921 case 6: /* DECOM -- Origin */
1922 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1923 tmoveato(0, 0);
1924 break;
1925 case 7: /* DECAWM -- Auto wrap */
1926 MODBIT(term.mode, set, MODE_WRAP);
1927 break;
1928 case 0: /* Error (IGNORED) */
1929 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1930 case 3: /* DECCOLM -- Column (IGNORED) */
1931 case 4: /* DECSCLM -- Scroll (IGNORED) */
1932 case 8: /* DECARM -- Auto repeat (IGNORED) */
1933 case 18: /* DECPFF -- Printer feed (IGNORED) */
1934 case 19: /* DECPEX -- Printer extent (IGNORED) */
1935 case 42: /* DECNRCM -- National characters (IGNORED) */
1936 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1937 break;
1938 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1939 MODBIT(term.mode, !set, MODE_HIDE);
1940 break;
1941 case 9: /* X10 mouse compatibility mode */
1942 xsetpointermotion(0);
1943 MODBIT(term.mode, 0, MODE_MOUSE);
1944 MODBIT(term.mode, set, MODE_MOUSEX10);
1945 break;
1946 case 1000: /* 1000: report button press */
1947 xsetpointermotion(0);
1948 MODBIT(term.mode, 0, MODE_MOUSE);
1949 MODBIT(term.mode, set, MODE_MOUSEBTN);
1950 break;
1951 case 1002: /* 1002: report motion on button press */
1952 xsetpointermotion(0);
1953 MODBIT(term.mode, 0, MODE_MOUSE);
1954 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1955 break;
1956 case 1003: /* 1003: enable all mouse motions */
1957 xsetpointermotion(set);
1958 MODBIT(term.mode, 0, MODE_MOUSE);
1959 MODBIT(term.mode, set, MODE_MOUSEMANY);
1960 break;
1961 case 1004: /* 1004: send focus events to tty */
1962 MODBIT(term.mode, set, MODE_FOCUS);
1963 break;
1964 case 1006: /* 1006: extended reporting mode */
1965 MODBIT(term.mode, set, MODE_MOUSESGR);
1966 break;
1967 case 1034:
1968 MODBIT(term.mode, set, MODE_8BIT);
1969 break;
1970 case 1049: /* swap screen & set/restore cursor as xterm */
1971 if (!allowaltscreen)
1972 break;
1973 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1974 /* FALLTHROUGH */
1975 case 47: /* swap screen */
1976 case 1047:
1977 if (!allowaltscreen)
1978 break;
1979 alt = IS_SET(MODE_ALTSCREEN);
1980 if(alt) {
1981 tclearregion(0, 0, term.col-1,
1982 term.row-1);
1983 }
1984 if(set ^ alt) /* set is always 1 or 0 */
1985 tswapscreen();
1986 if(*args != 1049)
1987 break;
1988 /* FALLTHROUGH */
1989 case 1048:
1990 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1991 break;
1992 case 2004: /* 2004: bracketed paste mode */
1993 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1994 break;
1995 /* Not implemented mouse modes. See comments there. */
1996 case 1001: /* mouse highlight mode; can hang the
1997 terminal by design when implemented. */
1998 case 1005: /* UTF-8 mouse mode; will confuse
1999 applications not supporting UTF-8
2000 and luit. */
2001 case 1015: /* urxvt mangled mouse mode; incompatible
2002 and can be mistaken for other control
2003 codes. */
2004 default:
2005 fprintf(stderr,
2006 "erresc: unknown private set/reset mode %d\n",
2007 *args);
2008 break;
2009 }
2010 } else {
2011 switch(*args) {
2012 case 0: /* Error (IGNORED) */
2013 break;
2014 case 2: /* KAM -- keyboard action */
2015 MODBIT(term.mode, set, MODE_KBDLOCK);
2016 break;
2017 case 4: /* IRM -- Insertion-replacement */
2018 MODBIT(term.mode, set, MODE_INSERT);
2019 break;
2020 case 12: /* SRM -- Send/Receive */
2021 MODBIT(term.mode, !set, MODE_ECHO);
2022 break;
2023 case 20: /* LNM -- Linefeed/new line */
2024 MODBIT(term.mode, set, MODE_CRLF);
2025 break;
2026 default:
2027 fprintf(stderr,
2028 "erresc: unknown set/reset mode %d\n",
2029 *args);
2030 break;
2031 }
2032 }
2033 }
2034 }
2035
2036 void
2037 csihandle(void) {
2038 char buf[40];
2039 int len;
2040
2041 switch(csiescseq.mode[0]) {
2042 default:
2043 unknown:
2044 fprintf(stderr, "erresc: unknown csi ");
2045 csidump();
2046 /* die(""); */
2047 break;
2048 case '@': /* ICH -- Insert <n> blank char */
2049 DEFAULT(csiescseq.arg[0], 1);
2050 tinsertblank(csiescseq.arg[0]);
2051 break;
2052 case 'A': /* CUU -- Cursor <n> Up */
2053 DEFAULT(csiescseq.arg[0], 1);
2054 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2055 break;
2056 case 'B': /* CUD -- Cursor <n> Down */
2057 case 'e': /* VPR --Cursor <n> Down */
2058 DEFAULT(csiescseq.arg[0], 1);
2059 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2060 break;
2061 case 'i': /* MC -- Media Copy */
2062 switch(csiescseq.arg[0]) {
2063 case 0:
2064 tdump();
2065 break;
2066 case 1:
2067 tdumpline(term.c.y);
2068 break;
2069 case 2:
2070 tdumpsel();
2071 break;
2072 case 4:
2073 term.mode &= ~MODE_PRINT;
2074 break;
2075 case 5:
2076 term.mode |= MODE_PRINT;
2077 break;
2078 }
2079 break;
2080 case 'c': /* DA -- Device Attributes */
2081 if(csiescseq.arg[0] == 0)
2082 ttywrite(vtiden, sizeof(vtiden) - 1);
2083 break;
2084 case 'C': /* CUF -- Cursor <n> Forward */
2085 case 'a': /* HPR -- Cursor <n> Forward */
2086 DEFAULT(csiescseq.arg[0], 1);
2087 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2088 break;
2089 case 'D': /* CUB -- Cursor <n> Backward */
2090 DEFAULT(csiescseq.arg[0], 1);
2091 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2092 break;
2093 case 'E': /* CNL -- Cursor <n> Down and first col */
2094 DEFAULT(csiescseq.arg[0], 1);
2095 tmoveto(0, term.c.y+csiescseq.arg[0]);
2096 break;
2097 case 'F': /* CPL -- Cursor <n> Up and first col */
2098 DEFAULT(csiescseq.arg[0], 1);
2099 tmoveto(0, term.c.y-csiescseq.arg[0]);
2100 break;
2101 case 'g': /* TBC -- Tabulation clear */
2102 switch(csiescseq.arg[0]) {
2103 case 0: /* clear current tab stop */
2104 term.tabs[term.c.x] = 0;
2105 break;
2106 case 3: /* clear all the tabs */
2107 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2108 break;
2109 default:
2110 goto unknown;
2111 }
2112 break;
2113 case 'G': /* CHA -- Move to <col> */
2114 case '`': /* HPA */
2115 DEFAULT(csiescseq.arg[0], 1);
2116 tmoveto(csiescseq.arg[0]-1, term.c.y);
2117 break;
2118 case 'H': /* CUP -- Move to <row> <col> */
2119 case 'f': /* HVP */
2120 DEFAULT(csiescseq.arg[0], 1);
2121 DEFAULT(csiescseq.arg[1], 1);
2122 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2123 break;
2124 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2125 DEFAULT(csiescseq.arg[0], 1);
2126 tputtab(csiescseq.arg[0]);
2127 break;
2128 case 'J': /* ED -- Clear screen */
2129 selclear(NULL);
2130 switch(csiescseq.arg[0]) {
2131 case 0: /* below */
2132 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2133 if(term.c.y < term.row-1) {
2134 tclearregion(0, term.c.y+1, term.col-1,
2135 term.row-1);
2136 }
2137 break;
2138 case 1: /* above */
2139 if(term.c.y > 1)
2140 tclearregion(0, 0, term.col-1, term.c.y-1);
2141 tclearregion(0, term.c.y, term.c.x, term.c.y);
2142 break;
2143 case 2: /* all */
2144 tclearregion(0, 0, term.col-1, term.row-1);
2145 break;
2146 default:
2147 goto unknown;
2148 }
2149 break;
2150 case 'K': /* EL -- Clear line */
2151 switch(csiescseq.arg[0]) {
2152 case 0: /* right */
2153 tclearregion(term.c.x, term.c.y, term.col-1,
2154 term.c.y);
2155 break;
2156 case 1: /* left */
2157 tclearregion(0, term.c.y, term.c.x, term.c.y);
2158 break;
2159 case 2: /* all */
2160 tclearregion(0, term.c.y, term.col-1, term.c.y);
2161 break;
2162 }
2163 break;
2164 case 'S': /* SU -- Scroll <n> line up */
2165 DEFAULT(csiescseq.arg[0], 1);
2166 tscrollup(term.top, csiescseq.arg[0]);
2167 break;
2168 case 'T': /* SD -- Scroll <n> line down */
2169 DEFAULT(csiescseq.arg[0], 1);
2170 tscrolldown(term.top, csiescseq.arg[0]);
2171 break;
2172 case 'L': /* IL -- Insert <n> blank lines */
2173 DEFAULT(csiescseq.arg[0], 1);
2174 tinsertblankline(csiescseq.arg[0]);
2175 break;
2176 case 'l': /* RM -- Reset Mode */
2177 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2178 break;
2179 case 'M': /* DL -- Delete <n> lines */
2180 DEFAULT(csiescseq.arg[0], 1);
2181 tdeleteline(csiescseq.arg[0]);
2182 break;
2183 case 'X': /* ECH -- Erase <n> char */
2184 DEFAULT(csiescseq.arg[0], 1);
2185 tclearregion(term.c.x, term.c.y,
2186 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2187 break;
2188 case 'P': /* DCH -- Delete <n> char */
2189 DEFAULT(csiescseq.arg[0], 1);
2190 tdeletechar(csiescseq.arg[0]);
2191 break;
2192 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2193 DEFAULT(csiescseq.arg[0], 1);
2194 tputtab(-csiescseq.arg[0]);
2195 break;
2196 case 'd': /* VPA -- Move to <row> */
2197 DEFAULT(csiescseq.arg[0], 1);
2198 tmoveato(term.c.x, csiescseq.arg[0]-1);
2199 break;
2200 case 'h': /* SM -- Set terminal mode */
2201 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2202 break;
2203 case 'm': /* SGR -- Terminal attribute (color) */
2204 tsetattr(csiescseq.arg, csiescseq.narg);
2205 break;
2206 case 'n': /* DSR – Device Status Report (cursor position) */
2207 if (csiescseq.arg[0] == 6) {
2208 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2209 term.c.y+1, term.c.x+1);
2210 ttywrite(buf, len);
2211 }
2212 break;
2213 case 'r': /* DECSTBM -- Set Scrolling Region */
2214 if(csiescseq.priv) {
2215 goto unknown;
2216 } else {
2217 DEFAULT(csiescseq.arg[0], 1);
2218 DEFAULT(csiescseq.arg[1], term.row);
2219 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2220 tmoveato(0, 0);
2221 }
2222 break;
2223 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2224 tcursor(CURSOR_SAVE);
2225 break;
2226 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2227 tcursor(CURSOR_LOAD);
2228 break;
2229 case ' ':
2230 switch (csiescseq.mode[1]) {
2231 case 'q': /* DECSCUSR -- Set Cursor Style */
2232 DEFAULT(csiescseq.arg[0], 1);
2233 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2234 goto unknown;
2235 }
2236 xw.cursor = csiescseq.arg[0];
2237 break;
2238 default:
2239 goto unknown;
2240 }
2241 break;
2242 }
2243 }
2244
2245 void
2246 csidump(void) {
2247 int i;
2248 uint c;
2249
2250 printf("ESC[");
2251 for(i = 0; i < csiescseq.len; i++) {
2252 c = csiescseq.buf[i] & 0xff;
2253 if(isprint(c)) {
2254 putchar(c);
2255 } else if(c == '\n') {
2256 printf("(\\n)");
2257 } else if(c == '\r') {
2258 printf("(\\r)");
2259 } else if(c == 0x1b) {
2260 printf("(\\e)");
2261 } else {
2262 printf("(%02x)", c);
2263 }
2264 }
2265 putchar('\n');
2266 }
2267
2268 void
2269 csireset(void) {
2270 memset(&csiescseq, 0, sizeof(csiescseq));
2271 }
2272
2273 void
2274 strhandle(void) {
2275 char *p = NULL;
2276 int j, narg, par;
2277
2278 term.esc &= ~(ESC_STR_END|ESC_STR);
2279 strparse();
2280 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2281
2282 switch(strescseq.type) {
2283 case ']': /* OSC -- Operating System Command */
2284 switch(par) {
2285 case 0:
2286 case 1:
2287 case 2:
2288 if(narg > 1)
2289 xsettitle(strescseq.args[1]);
2290 return;
2291 case 4: /* color set */
2292 if(narg < 3)
2293 break;
2294 p = strescseq.args[2];
2295 /* FALLTHROUGH */
2296 case 104: /* color reset, here p = NULL */
2297 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2298 if(xsetcolorname(j, p)) {
2299 fprintf(stderr, "erresc: invalid color %s\n", p);
2300 } else {
2301 /*
2302 * TODO if defaultbg color is changed, borders
2303 * are dirty
2304 */
2305 redraw();
2306 }
2307 return;
2308 }
2309 break;
2310 case 'k': /* old title set compatibility */
2311 xsettitle(strescseq.args[0]);
2312 return;
2313 case 'P': /* DCS -- Device Control String */
2314 case '_': /* APC -- Application Program Command */
2315 case '^': /* PM -- Privacy Message */
2316 return;
2317 }
2318
2319 fprintf(stderr, "erresc: unknown str ");
2320 strdump();
2321 }
2322
2323 void
2324 strparse(void) {
2325 int c;
2326 char *p = strescseq.buf;
2327
2328 strescseq.narg = 0;
2329 strescseq.buf[strescseq.len] = '\0';
2330
2331 if(*p == '\0')
2332 return;
2333
2334 while(strescseq.narg < STR_ARG_SIZ) {
2335 strescseq.args[strescseq.narg++] = p;
2336 while((c = *p) != ';' && c != '\0')
2337 ++p;
2338 if(c == '\0')
2339 return;
2340 *p++ = '\0';
2341 }
2342 }
2343
2344 void
2345 strdump(void) {
2346 int i;
2347 uint c;
2348
2349 printf("ESC%c", strescseq.type);
2350 for(i = 0; i < strescseq.len; i++) {
2351 c = strescseq.buf[i] & 0xff;
2352 if(c == '\0') {
2353 return;
2354 } else if(isprint(c)) {
2355 putchar(c);
2356 } else if(c == '\n') {
2357 printf("(\\n)");
2358 } else if(c == '\r') {
2359 printf("(\\r)");
2360 } else if(c == 0x1b) {
2361 printf("(\\e)");
2362 } else {
2363 printf("(%02x)", c);
2364 }
2365 }
2366 printf("ESC\\\n");
2367 }
2368
2369 void
2370 strreset(void) {
2371 memset(&strescseq, 0, sizeof(strescseq));
2372 }
2373
2374 void
2375 tprinter(char *s, size_t len) {
2376 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2377 fprintf(stderr, "Error writing in %s:%s\n",
2378 opt_io, strerror(errno));
2379 close(iofd);
2380 iofd = -1;
2381 }
2382 }
2383
2384 void
2385 toggleprinter(const Arg *arg) {
2386 term.mode ^= MODE_PRINT;
2387 }
2388
2389 void
2390 printscreen(const Arg *arg) {
2391 tdump();
2392 }
2393
2394 void
2395 printsel(const Arg *arg) {
2396 tdumpsel();
2397 }
2398
2399 void
2400 tdumpsel(void) {
2401 char *ptr;
2402
2403 if((ptr = getsel())) {
2404 tprinter(ptr, strlen(ptr));
2405 free(ptr);
2406 }
2407 }
2408
2409 void
2410 tdumpline(int n) {
2411 char buf[UTF_SIZ];
2412 Glyph *bp, *end;
2413
2414 bp = &term.line[n][0];
2415 end = &bp[MIN(tlinelen(n), term.col) - 1];
2416 if(bp != end || bp->u != ' ') {
2417 for( ;bp <= end; ++bp)
2418 tprinter(buf, utf8encode(bp->u, buf));
2419 }
2420 tprinter("\n", 1);
2421 }
2422
2423 void
2424 tdump(void) {
2425 int i;
2426
2427 for(i = 0; i < term.row; ++i)
2428 tdumpline(i);
2429 }
2430
2431 void
2432 tputtab(int n) {
2433 uint x = term.c.x;
2434
2435 if(n > 0) {
2436 while(x < term.col && n--)
2437 for(++x; x < term.col && !term.tabs[x]; ++x)
2438 /* nothing */ ;
2439 } else if(n < 0) {
2440 while(x > 0 && n++)
2441 for(--x; x > 0 && !term.tabs[x]; --x)
2442 /* nothing */ ;
2443 }
2444 term.c.x = LIMIT(x, 0, term.col-1);
2445 }
2446
2447 void
2448 techo(Rune u) {
2449 if(ISCONTROL(u)) { /* control code */
2450 if(u & 0x80) {
2451 u &= 0x7f;
2452 tputc('^');
2453 tputc('[');
2454 } else if(u != '\n' && u != '\r' && u != '\t') {
2455 u ^= 0x40;
2456 tputc('^');
2457 }
2458 }
2459 tputc(u);
2460 }
2461
2462 void
2463 tdeftran(char ascii) {
2464 static char cs[] = "0B";
2465 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2466 char *p;
2467
2468 if((p = strchr(cs, ascii)) == NULL) {
2469 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2470 } else {
2471 term.trantbl[term.icharset] = vcs[p - cs];
2472 }
2473 }
2474
2475 void
2476 tdectest(char c) {
2477 int x, y;
2478
2479 if(c == '8') { /* DEC screen alignment test. */
2480 for(x = 0; x < term.col; ++x) {
2481 for(y = 0; y < term.row; ++y)
2482 tsetchar('E', &term.c.attr, x, y);
2483 }
2484 }
2485 }
2486
2487 void
2488 tstrsequence(uchar c) {
2489 switch (c) {
2490 case 0x90: /* DCS -- Device Control String */
2491 c = 'P';
2492 break;
2493 case 0x9f: /* APC -- Application Program Command */
2494 c = '_';
2495 break;
2496 case 0x9e: /* PM -- Privacy Message */
2497 c = '^';
2498 break;
2499 case 0x9d: /* OSC -- Operating System Command */
2500 c = ']';
2501 break;
2502 }
2503 strreset();
2504 strescseq.type = c;
2505 term.esc |= ESC_STR;
2506 }
2507
2508 void
2509 tcontrolcode(uchar ascii) {
2510 switch(ascii) {
2511 case '\t': /* HT */
2512 tputtab(1);
2513 return;
2514 case '\b': /* BS */
2515 tmoveto(term.c.x-1, term.c.y);
2516 return;
2517 case '\r': /* CR */
2518 tmoveto(0, term.c.y);
2519 return;
2520 case '\f': /* LF */
2521 case '\v': /* VT */
2522 case '\n': /* LF */
2523 /* go to first col if the mode is set */
2524 tnewline(IS_SET(MODE_CRLF));
2525 return;
2526 case '\a': /* BEL */
2527 if(term.esc & ESC_STR_END) {
2528 /* backwards compatibility to xterm */
2529 strhandle();
2530 } else {
2531 if(!(xw.state & WIN_FOCUSED))
2532 xseturgency(1);
2533 if (bellvolume)
2534 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2535 }
2536 break;
2537 case '\033': /* ESC */
2538 csireset();
2539 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2540 term.esc |= ESC_START;
2541 return;
2542 case '\016': /* SO (LS1 -- Locking shift 1) */
2543 case '\017': /* SI (LS0 -- Locking shift 0) */
2544 term.charset = 1 - (ascii - '\016');
2545 return;
2546 case '\032': /* SUB */
2547 tsetchar('?', &term.c.attr, term.c.x, term.c.y);
2548 case '\030': /* CAN */
2549 csireset();
2550 break;
2551 case '\005': /* ENQ (IGNORED) */
2552 case '\000': /* NUL (IGNORED) */
2553 case '\021': /* XON (IGNORED) */
2554 case '\023': /* XOFF (IGNORED) */
2555 case 0177: /* DEL (IGNORED) */
2556 return;
2557 case 0x84: /* TODO: IND */
2558 break;
2559 case 0x85: /* NEL -- Next line */
2560 tnewline(1); /* always go to first col */
2561 break;
2562 case 0x88: /* HTS -- Horizontal tab stop */
2563 term.tabs[term.c.x] = 1;
2564 break;
2565 case 0x8d: /* TODO: RI */
2566 case 0x8e: /* TODO: SS2 */
2567 case 0x8f: /* TODO: SS3 */
2568 case 0x98: /* TODO: SOS */
2569 break;
2570 case 0x9a: /* DECID -- Identify Terminal */
2571 ttywrite(vtiden, sizeof(vtiden) - 1);
2572 break;
2573 case 0x9b: /* TODO: CSI */
2574 case 0x9c: /* TODO: ST */
2575 break;
2576 case 0x90: /* DCS -- Device Control String */
2577 case 0x9f: /* APC -- Application Program Command */
2578 case 0x9e: /* PM -- Privacy Message */
2579 case 0x9d: /* OSC -- Operating System Command */
2580 tstrsequence(ascii);
2581 return;
2582 }
2583 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2584 term.esc &= ~(ESC_STR_END|ESC_STR);
2585 }
2586
2587 /*
2588 * returns 1 when the sequence is finished and it hasn't to read
2589 * more characters for this sequence, otherwise 0
2590 */
2591 int
2592 eschandle(uchar ascii) {
2593 switch(ascii) {
2594 case '[':
2595 term.esc |= ESC_CSI;
2596 return 0;
2597 case '#':
2598 term.esc |= ESC_TEST;
2599 return 0;
2600 case 'P': /* DCS -- Device Control String */
2601 case '_': /* APC -- Application Program Command */
2602 case '^': /* PM -- Privacy Message */
2603 case ']': /* OSC -- Operating System Command */
2604 case 'k': /* old title set compatibility */
2605 tstrsequence(ascii);
2606 return 0;
2607 case 'n': /* LS2 -- Locking shift 2 */
2608 case 'o': /* LS3 -- Locking shift 3 */
2609 term.charset = 2 + (ascii - 'n');
2610 break;
2611 case '(': /* GZD4 -- set primary charset G0 */
2612 case ')': /* G1D4 -- set secondary charset G1 */
2613 case '*': /* G2D4 -- set tertiary charset G2 */
2614 case '+': /* G3D4 -- set quaternary charset G3 */
2615 term.icharset = ascii - '(';
2616 term.esc |= ESC_ALTCHARSET;
2617 return 0;
2618 case 'D': /* IND -- Linefeed */
2619 if(term.c.y == term.bot) {
2620 tscrollup(term.top, 1);
2621 } else {
2622 tmoveto(term.c.x, term.c.y+1);
2623 }
2624 break;
2625 case 'E': /* NEL -- Next line */
2626 tnewline(1); /* always go to first col */
2627 break;
2628 case 'H': /* HTS -- Horizontal tab stop */
2629 term.tabs[term.c.x] = 1;
2630 break;
2631 case 'M': /* RI -- Reverse index */
2632 if(term.c.y == term.top) {
2633 tscrolldown(term.top, 1);
2634 } else {
2635 tmoveto(term.c.x, term.c.y-1);
2636 }
2637 break;
2638 case 'Z': /* DECID -- Identify Terminal */
2639 ttywrite(vtiden, sizeof(vtiden) - 1);
2640 break;
2641 case 'c': /* RIS -- Reset to inital state */
2642 treset();
2643 xresettitle();
2644 xloadcols();
2645 break;
2646 case '=': /* DECPAM -- Application keypad */
2647 term.mode |= MODE_APPKEYPAD;
2648 break;
2649 case '>': /* DECPNM -- Normal keypad */
2650 term.mode &= ~MODE_APPKEYPAD;
2651 break;
2652 case '7': /* DECSC -- Save Cursor */
2653 tcursor(CURSOR_SAVE);
2654 break;
2655 case '8': /* DECRC -- Restore Cursor */
2656 tcursor(CURSOR_LOAD);
2657 break;
2658 case '\\': /* ST -- String Terminator */
2659 if(term.esc & ESC_STR_END)
2660 strhandle();
2661 break;
2662 default:
2663 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2664 (uchar) ascii, isprint(ascii)? ascii:'.');
2665 break;
2666 }
2667 return 1;
2668 }
2669
2670 void
2671 tputc(Rune u) {
2672 char c[UTF_SIZ];
2673 bool control;
2674 int width, len;
2675 Glyph *gp;
2676
2677 len = utf8encode(u, c);
2678 if((width = wcwidth(u)) == -1) {
2679 memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
2680 width = 1;
2681 }
2682
2683 if(IS_SET(MODE_PRINT))
2684 tprinter(c, len);
2685 control = ISCONTROL(u);
2686
2687 /*
2688 * STR sequence must be checked before anything else
2689 * because it uses all following characters until it
2690 * receives a ESC, a SUB, a ST or any other C1 control
2691 * character.
2692 */
2693 if(term.esc & ESC_STR) {
2694 if(u == '\a' || u == 030 || u == 032 || u == 033 ||
2695 ISCONTROLC1(u)) {
2696 term.esc &= ~(ESC_START|ESC_STR);
2697 term.esc |= ESC_STR_END;
2698 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2699 memmove(&strescseq.buf[strescseq.len], c, len);
2700 strescseq.len += len;
2701 return;
2702 } else {
2703 /*
2704 * Here is a bug in terminals. If the user never sends
2705 * some code to stop the str or esc command, then st
2706 * will stop responding. But this is better than
2707 * silently failing with unknown characters. At least
2708 * then users will report back.
2709 *
2710 * In the case users ever get fixed, here is the code:
2711 */
2712 /*
2713 * term.esc = 0;
2714 * strhandle();
2715 */
2716 return;
2717 }
2718 }
2719
2720 /*
2721 * Actions of control codes must be performed as soon they arrive
2722 * because they can be embedded inside a control sequence, and
2723 * they must not cause conflicts with sequences.
2724 */
2725 if(control) {
2726 tcontrolcode(u);
2727 /*
2728 * control codes are not shown ever
2729 */
2730 return;
2731 } else if(term.esc & ESC_START) {
2732 if(term.esc & ESC_CSI) {
2733 csiescseq.buf[csiescseq.len++] = u;
2734 if(BETWEEN(u, 0x40, 0x7E)
2735 || csiescseq.len >= \
2736 sizeof(csiescseq.buf)-1) {
2737 term.esc = 0;
2738 csiparse();
2739 csihandle();
2740 }
2741 return;
2742 } else if(term.esc & ESC_ALTCHARSET) {
2743 tdeftran(u);
2744 } else if(term.esc & ESC_TEST) {
2745 tdectest(u);
2746 } else {
2747 if (!eschandle(u))
2748 return;
2749 /* sequence already finished */
2750 }
2751 term.esc = 0;
2752 /*
2753 * All characters which form part of a sequence are not
2754 * printed
2755 */
2756 return;
2757 }
2758 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2759 selclear(NULL);
2760
2761 gp = &term.line[term.c.y][term.c.x];
2762 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2763 gp->mode |= ATTR_WRAP;
2764 tnewline(1);
2765 gp = &term.line[term.c.y][term.c.x];
2766 }
2767
2768 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2769 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2770
2771 if(term.c.x+width > term.col) {
2772 tnewline(1);
2773 gp = &term.line[term.c.y][term.c.x];
2774 }
2775
2776 tsetchar(u, &term.c.attr, term.c.x, term.c.y);
2777
2778 if(width == 2) {
2779 gp->mode |= ATTR_WIDE;
2780 if(term.c.x+1 < term.col) {
2781 gp[1].u = '\0';
2782 gp[1].mode = ATTR_WDUMMY;
2783 }
2784 }
2785 if(term.c.x+width < term.col) {
2786 tmoveto(term.c.x+width, term.c.y);
2787 } else {
2788 term.c.state |= CURSOR_WRAPNEXT;
2789 }
2790 }
2791
2792 void
2793 tresize(int col, int row) {
2794 int i;
2795 int minrow = MIN(row, term.row);
2796 int mincol = MIN(col, term.col);
2797 bool *bp;
2798 TCursor c;
2799
2800 if(col < 1 || row < 1) {
2801 fprintf(stderr,
2802 "tresize: error resizing to %dx%d\n", col, row);
2803 return;
2804 }
2805
2806 /*
2807 * slide screen to keep cursor where we expect it -
2808 * tscrollup would work here, but we can optimize to
2809 * memmove because we're freeing the earlier lines
2810 */
2811 for(i = 0; i <= term.c.y - row; i++) {
2812 free(term.line[i]);
2813 free(term.alt[i]);
2814 }
2815 /* ensure that both src and dst are not NULL */
2816 if (i > 0) {
2817 memmove(term.line, term.line + i, row * sizeof(Line));
2818 memmove(term.alt, term.alt + i, row * sizeof(Line));
2819 }
2820 for(i += row; i < term.row; i++) {
2821 free(term.line[i]);
2822 free(term.alt[i]);
2823 }
2824
2825 /* resize to new width */
2826 term.specbuf = xrealloc(term.specbuf, col * sizeof(XftGlyphFontSpec));
2827
2828 /* resize to new height */
2829 term.line = xrealloc(term.line, row * sizeof(Line));
2830 term.alt = xrealloc(term.alt, row * sizeof(Line));
2831 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2832 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2833
2834 /* resize each row to new width, zero-pad if needed */
2835 for(i = 0; i < minrow; i++) {
2836 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2837 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2838 }
2839
2840 /* allocate any new rows */
2841 for(/* i == minrow */; i < row; i++) {
2842 term.line[i] = xmalloc(col * sizeof(Glyph));
2843 term.alt[i] = xmalloc(col * sizeof(Glyph));
2844 }
2845 if(col > term.col) {
2846 bp = term.tabs + term.col;
2847
2848 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2849 while(--bp > term.tabs && !*bp)
2850 /* nothing */ ;
2851 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2852 *bp = 1;
2853 }
2854 /* update terminal size */
2855 term.col = col;
2856 term.row = row;
2857 /* reset scrolling region */
2858 tsetscroll(0, row-1);
2859 /* make use of the LIMIT in tmoveto */
2860 tmoveto(term.c.x, term.c.y);
2861 /* Clearing both screens (it makes dirty all lines) */
2862 c = term.c;
2863 for(i = 0; i < 2; i++) {
2864 if(mincol < col && 0 < minrow) {
2865 tclearregion(mincol, 0, col - 1, minrow - 1);
2866 }
2867 if(0 < col && minrow < row) {
2868 tclearregion(0, minrow, col - 1, row - 1);
2869 }
2870 tswapscreen();
2871 tcursor(CURSOR_LOAD);
2872 }
2873 term.c = c;
2874 }
2875
2876 void
2877 xresize(int col, int row) {
2878 xw.tw = MAX(1, col * xw.cw);
2879 xw.th = MAX(1, row * xw.ch);
2880
2881 XFreePixmap(xw.dpy, xw.buf);
2882 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2883 DefaultDepth(xw.dpy, xw.scr));
2884 XftDrawChange(xw.draw, xw.buf);
2885 xclear(0, 0, xw.w, xw.h);
2886 }
2887
2888 ushort
2889 sixd_to_16bit(int x) {
2890 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2891 }
2892
2893 bool
2894 xloadcolor(int i, const char *name, Color *ncolor) {
2895 XRenderColor color = { .alpha = 0xffff };
2896
2897 if(!name) {
2898 if(BETWEEN(i, 16, 255)) { /* 256 color */
2899 if(i < 6*6*6+16) { /* same colors as xterm */
2900 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2901 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2902 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2903 } else { /* greyscale */
2904 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
2905 color.green = color.blue = color.red;
2906 }
2907 return XftColorAllocValue(xw.dpy, xw.vis,
2908 xw.cmap, &color, ncolor);
2909 } else
2910 name = colorname[i];
2911 }
2912 return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
2913 }
2914
2915 void
2916 xloadcols(void) {
2917 int i;
2918 static bool loaded;
2919 Color *cp;
2920
2921 if(loaded) {
2922 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
2923 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2924 }
2925
2926 for(i = 0; i < LEN(dc.col); i++)
2927 if(!xloadcolor(i, NULL, &dc.col[i])) {
2928 if(colorname[i])
2929 die("Could not allocate color '%s'\n", colorname[i]);
2930 else
2931 die("Could not allocate color %d\n", i);
2932 }
2933 loaded = true;
2934 }
2935
2936 int
2937 xsetcolorname(int x, const char *name) {
2938 Color ncolor;
2939
2940 if(!BETWEEN(x, 0, LEN(dc.col)))
2941 return 1;
2942
2943
2944 if(!xloadcolor(x, name, &ncolor))
2945 return 1;
2946
2947 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2948 dc.col[x] = ncolor;
2949 return 0;
2950 }
2951
2952 void
2953 xtermclear(int col1, int row1, int col2, int row2) {
2954 XftDrawRect(xw.draw,
2955 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2956 borderpx + col1 * xw.cw,
2957 borderpx + row1 * xw.ch,
2958 (col2-col1+1) * xw.cw,
2959 (row2-row1+1) * xw.ch);
2960 }
2961
2962 /*
2963 * Absolute coordinates.
2964 */
2965 void
2966 xclear(int x1, int y1, int x2, int y2) {
2967 XftDrawRect(xw.draw,
2968 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2969 x1, y1, x2-x1, y2-y1);
2970 }
2971
2972 void
2973 xhints(void) {
2974 XClassHint class = {opt_class ? opt_class : termname, termname};
2975 XWMHints wm = {.flags = InputHint, .input = 1};
2976 XSizeHints *sizeh = NULL;
2977
2978 sizeh = XAllocSizeHints();
2979
2980 sizeh->flags = PSize | PResizeInc | PBaseSize;
2981 sizeh->height = xw.h;
2982 sizeh->width = xw.w;
2983 sizeh->height_inc = xw.ch;
2984 sizeh->width_inc = xw.cw;
2985 sizeh->base_height = 2 * borderpx;
2986 sizeh->base_width = 2 * borderpx;
2987 if(xw.isfixed == True) {
2988 sizeh->flags |= PMaxSize | PMinSize;
2989 sizeh->min_width = sizeh->max_width = xw.w;
2990 sizeh->min_height = sizeh->max_height = xw.h;
2991 }
2992 if(xw.gm & (XValue|YValue)) {
2993 sizeh->flags |= USPosition | PWinGravity;
2994 sizeh->x = xw.l;
2995 sizeh->y = xw.t;
2996 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2997 }
2998
2999 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
3000 &class);
3001 XFree(sizeh);
3002 }
3003
3004 int
3005 xgeommasktogravity(int mask) {
3006 switch(mask & (XNegative|YNegative)) {
3007 case 0:
3008 return NorthWestGravity;
3009 case XNegative:
3010 return NorthEastGravity;
3011 case YNegative:
3012 return SouthWestGravity;
3013 }
3014 return SouthEastGravity;
3015 }
3016
3017 int
3018 xloadfont(Font *f, FcPattern *pattern) {
3019 FcPattern *match;
3020 FcResult result;
3021
3022 match = FcFontMatch(NULL, pattern, &result);
3023 if(!match)
3024 return 1;
3025
3026 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3027 FcPatternDestroy(match);
3028 return 1;
3029 }
3030
3031 f->set = NULL;
3032 f->pattern = FcPatternDuplicate(pattern);
3033
3034 f->ascent = f->match->ascent;
3035 f->descent = f->match->descent;
3036 f->lbearing = 0;
3037 f->rbearing = f->match->max_advance_width;
3038
3039 f->height = f->ascent + f->descent;
3040 f->width = f->lbearing + f->rbearing;
3041
3042 return 0;
3043 }
3044
3045 void
3046 xloadfonts(char *fontstr, double fontsize) {
3047 FcPattern *pattern;
3048 FcResult r_sz, r_psz;
3049 double fontval;
3050 float ceilf(float);
3051
3052 if(fontstr[0] == '-') {
3053 pattern = XftXlfdParse(fontstr, False, False);
3054 } else {
3055 pattern = FcNameParse((FcChar8 *)fontstr);
3056 }
3057
3058 if(!pattern)
3059 die("st: can't open font %s\n", fontstr);
3060
3061 if(fontsize > 1) {
3062 FcPatternDel(pattern, FC_PIXEL_SIZE);
3063 FcPatternDel(pattern, FC_SIZE);
3064 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3065 usedfontsize = fontsize;
3066 } else {
3067 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3068 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3069 if(r_psz == FcResultMatch) {
3070 usedfontsize = fontval;
3071 } else if(r_sz == FcResultMatch) {
3072 usedfontsize = -1;
3073 } else {
3074 /*
3075 * Default font size is 12, if none given. This is to
3076 * have a known usedfontsize value.
3077 */
3078 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3079 usedfontsize = 12;
3080 }
3081 defaultfontsize = usedfontsize;
3082 }
3083
3084 FcConfigSubstitute(0, pattern, FcMatchPattern);
3085 FcDefaultSubstitute(pattern);
3086
3087 if(xloadfont(&dc.font, pattern))
3088 die("st: can't open font %s\n", fontstr);
3089
3090 if(usedfontsize < 0) {
3091 FcPatternGetDouble(dc.font.match->pattern,
3092 FC_PIXEL_SIZE, 0, &fontval);
3093 usedfontsize = fontval;
3094 if(fontsize == 0)
3095 defaultfontsize = fontval;
3096 }
3097
3098 /* Setting character width and height. */
3099 xw.cw = ceilf(dc.font.width * cwscale);
3100 xw.ch = ceilf(dc.font.height * chscale);
3101
3102 FcPatternDel(pattern, FC_SLANT);
3103 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3104 if(xloadfont(&dc.ifont, pattern))
3105 die("st: can't open font %s\n", fontstr);
3106
3107 FcPatternDel(pattern, FC_WEIGHT);
3108 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3109 if(xloadfont(&dc.ibfont, pattern))
3110 die("st: can't open font %s\n", fontstr);
3111
3112 FcPatternDel(pattern, FC_SLANT);
3113 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3114 if(xloadfont(&dc.bfont, pattern))
3115 die("st: can't open font %s\n", fontstr);
3116
3117 FcPatternDestroy(pattern);
3118 }
3119
3120 void
3121 xunloadfont(Font *f) {
3122 XftFontClose(xw.dpy, f->match);
3123 FcPatternDestroy(f->pattern);
3124 if(f->set)
3125 FcFontSetDestroy(f->set);
3126 }
3127
3128 void
3129 xunloadfonts(void) {
3130 /* Free the loaded fonts in the font cache. */
3131 while(frclen > 0)
3132 XftFontClose(xw.dpy, frc[--frclen].font);
3133
3134 xunloadfont(&dc.font);
3135 xunloadfont(&dc.bfont);
3136 xunloadfont(&dc.ifont);
3137 xunloadfont(&dc.ibfont);
3138 }
3139
3140 void
3141 xzoom(const Arg *arg) {
3142 Arg larg;
3143
3144 larg.i = usedfontsize + arg->i;
3145 xzoomabs(&larg);
3146 }
3147
3148 void
3149 xzoomabs(const Arg *arg) {
3150 xunloadfonts();
3151 xloadfonts(usedfont, arg->i);
3152 cresize(0, 0);
3153 redraw();
3154 xhints();
3155 }
3156
3157 void
3158 xzoomreset(const Arg *arg) {
3159 Arg larg;
3160
3161 if(defaultfontsize > 0) {
3162 larg.i = defaultfontsize;
3163 xzoomabs(&larg);
3164 }
3165 }
3166
3167 void
3168 xinit(void) {
3169 XGCValues gcvalues;
3170 Cursor cursor;
3171 Window parent;
3172 pid_t thispid = getpid();
3173
3174 if(!(xw.dpy = XOpenDisplay(NULL)))
3175 die("Can't open display\n");
3176 xw.scr = XDefaultScreen(xw.dpy);
3177 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3178
3179 /* font */
3180 if(!FcInit())
3181 die("Could not init fontconfig.\n");
3182
3183 usedfont = (opt_font == NULL)? font : opt_font;
3184 xloadfonts(usedfont, 0);
3185
3186 /* colors */
3187 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3188 xloadcols();
3189
3190 /* adjust fixed window geometry */
3191 xw.w = 2 * borderpx + term.col * xw.cw;
3192 xw.h = 2 * borderpx + term.row * xw.ch;
3193 if(xw.gm & XNegative)
3194 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3195 if(xw.gm & YNegative)
3196 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3197
3198 /* Events */
3199 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3200 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3201 xw.attrs.bit_gravity = NorthWestGravity;
3202 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3203 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3204 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3205 xw.attrs.colormap = xw.cmap;
3206
3207 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3208 parent = XRootWindow(xw.dpy, xw.scr);
3209 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3210 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3211 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3212 | CWEventMask | CWColormap, &xw.attrs);
3213
3214 memset(&gcvalues, 0, sizeof(gcvalues));
3215 gcvalues.graphics_exposures = False;
3216 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3217 &gcvalues);
3218 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3219 DefaultDepth(xw.dpy, xw.scr));
3220 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3221 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3222
3223 /* Xft rendering context */
3224 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3225
3226 /* input methods */
3227 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3228 XSetLocaleModifiers("@im=local");
3229 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3230 XSetLocaleModifiers("@im=");
3231 if((xw.xim = XOpenIM(xw.dpy,
3232 NULL, NULL, NULL)) == NULL) {
3233 die("XOpenIM failed. Could not open input"
3234 " device.\n");
3235 }
3236 }
3237 }
3238 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3239 | XIMStatusNothing, XNClientWindow, xw.win,
3240 XNFocusWindow, xw.win, NULL);
3241 if(xw.xic == NULL)
3242 die("XCreateIC failed. Could not obtain input method.\n");
3243
3244 /* white cursor, black outline */
3245 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3246 XDefineCursor(xw.dpy, xw.win, cursor);
3247 XRecolorCursor(xw.dpy, cursor,
3248 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3249 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3250
3251 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3252 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3253 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3254 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3255
3256 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3257 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3258 PropModeReplace, (uchar *)&thispid, 1);
3259
3260 xresettitle();
3261 XMapWindow(xw.dpy, xw.win);
3262 xhints();
3263 XSync(xw.dpy, False);
3264 }
3265
3266 int
3267 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
3268 {
3269 float winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch, xp, yp;
3270 ushort mode, prevmode = USHRT_MAX;
3271 Font *font = &dc.font;
3272 int frcflags = FRC_NORMAL;
3273 float runewidth = xw.cw;
3274 Rune rune;
3275 FT_UInt glyphidx;
3276 FcResult fcres;
3277 FcPattern *fcpattern, *fontpattern;
3278 FcFontSet *fcsets[] = { NULL };
3279 FcCharSet *fccharset;
3280 int i, f, numspecs = 0;
3281
3282 for(i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
3283 /* Fetch rune and mode for current glyph. */
3284 rune = glyphs[i].u;
3285 mode = glyphs[i].mode;
3286
3287 /* Skip dummy wide-character spacing. */
3288 if(mode == ATTR_WDUMMY)
3289 continue;
3290
3291 /* Determine font for glyph if different from previous glyph. */
3292 if(prevmode != mode) {
3293 prevmode = mode;
3294 font = &dc.font;
3295 frcflags = FRC_NORMAL;
3296 runewidth = xw.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
3297 if((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
3298 font = &dc.ibfont;
3299 frcflags = FRC_ITALICBOLD;
3300 } else if(mode & ATTR_ITALIC) {
3301 font = &dc.ifont;
3302 frcflags = FRC_ITALIC;
3303 } else if(mode & ATTR_BOLD) {
3304 font = &dc.bfont;
3305 frcflags = FRC_BOLD;
3306 }
3307 yp = winy + font->ascent;
3308 }
3309
3310 /* Lookup character index with default font. */
3311 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
3312 if(glyphidx) {
3313 specs[numspecs].font = font->match;
3314 specs[numspecs].glyph = glyphidx;
3315 specs[numspecs].x = (short)xp;
3316 specs[numspecs].y = (short)yp;
3317 xp += runewidth;
3318 numspecs++;
3319 continue;
3320 }
3321
3322 /* Fallback on font cache, search the font cache for match. */
3323 for(f = 0; f < frclen; f++) {
3324 glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
3325 /* Everything correct. */
3326 if(glyphidx && frc[f].flags == frcflags)
3327 break;
3328 /* We got a default font for a not found glyph. */
3329 if(!glyphidx && frc[f].flags == frcflags
3330 && frc[f].unicodep == rune) {
3331 break;
3332 }
3333 }
3334
3335 /* Nothing was found. Use fontconfig to find matching font. */
3336 if(f >= frclen) {
3337 if(!font->set)
3338 font->set = FcFontSort(0, font->pattern,
3339 FcTrue, 0, &fcres);
3340 fcsets[0] = font->set;
3341
3342 /*
3343 * Nothing was found in the cache. Now use
3344 * some dozen of Fontconfig calls to get the
3345 * font for one single character.
3346 *
3347 * Xft and fontconfig are design failures.
3348 */
3349 fcpattern = FcPatternDuplicate(font->pattern);
3350 fccharset = FcCharSetCreate();
3351
3352 FcCharSetAddChar(fccharset, rune);
3353 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3354 fccharset);
3355 FcPatternAddBool(fcpattern, FC_SCALABLE,
3356 FcTrue);
3357
3358 FcConfigSubstitute(0, fcpattern,
3359 FcMatchPattern);
3360 FcDefaultSubstitute(fcpattern);
3361
3362 fontpattern = FcFontSetMatch(0, fcsets, 1,
3363 fcpattern, &fcres);
3364
3365 /*
3366 * Overwrite or create the new cache entry.
3367 */
3368 if(frclen >= LEN(frc)) {
3369 frclen = LEN(frc) - 1;
3370 XftFontClose(xw.dpy, frc[frclen].font);
3371 frc[frclen].unicodep = 0;
3372 }
3373
3374 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3375 fontpattern);
3376 frc[frclen].flags = frcflags;
3377 frc[frclen].unicodep = rune;
3378
3379 glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
3380
3381 f = frclen;
3382 frclen++;
3383
3384 FcPatternDestroy(fcpattern);
3385 FcCharSetDestroy(fccharset);
3386 }
3387
3388 specs[numspecs].font = frc[f].font;
3389 specs[numspecs].glyph = glyphidx;
3390 specs[numspecs].x = (short)xp;
3391 specs[numspecs].y = (short)(winy + frc[f].font->ascent);
3392 xp += runewidth;
3393 numspecs++;
3394 }
3395
3396 return numspecs;
3397 }
3398
3399 void
3400 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y) {
3401 int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
3402 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3403 width = charlen * xw.cw;
3404 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3405 XRenderColor colfg, colbg;
3406 XRectangle r;
3407
3408 /* Determine foreground and background colors based on mode. */
3409 if(base.fg == defaultfg) {
3410 if(base.mode & ATTR_ITALIC)
3411 base.fg = defaultitalic;
3412 else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD))
3413 base.fg = defaultitalic;
3414 else if(base.mode & ATTR_UNDERLINE)
3415 base.fg = defaultunderline;
3416 }
3417
3418 if(IS_TRUECOL(base.fg)) {
3419 colfg.alpha = 0xffff;
3420 colfg.red = TRUERED(base.fg);
3421 colfg.green = TRUEGREEN(base.fg);
3422 colfg.blue = TRUEBLUE(base.fg);
3423 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3424 fg = &truefg;
3425 } else {
3426 fg = &dc.col[base.fg];
3427 }
3428
3429 if(IS_TRUECOL(base.bg)) {
3430 colbg.alpha = 0xffff;
3431 colbg.green = TRUEGREEN(base.bg);
3432 colbg.red = TRUERED(base.bg);
3433 colbg.blue = TRUEBLUE(base.bg);
3434 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3435 bg = &truebg;
3436 } else {
3437 bg = &dc.col[base.bg];
3438 }
3439
3440 /* Change basic system colors [0-7] to bright system colors [8-15] */
3441 if((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
3442 fg = &dc.col[base.fg + 8];
3443
3444 if(IS_SET(MODE_REVERSE)) {
3445 if(fg == &dc.col[defaultfg]) {
3446 fg = &dc.col[defaultbg];
3447 } else {
3448 colfg.red = ~fg->color.red;
3449 colfg.green = ~fg->color.green;
3450 colfg.blue = ~fg->color.blue;
3451 colfg.alpha = fg->color.alpha;
3452 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3453 &revfg);
3454 fg = &revfg;
3455 }
3456
3457 if(bg == &dc.col[defaultbg]) {
3458 bg = &dc.col[defaultfg];
3459 } else {
3460 colbg.red = ~bg->color.red;
3461 colbg.green = ~bg->color.green;
3462 colbg.blue = ~bg->color.blue;
3463 colbg.alpha = bg->color.alpha;
3464 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3465 &revbg);
3466 bg = &revbg;
3467 }
3468 }
3469
3470 if(base.mode & ATTR_REVERSE) {
3471 temp = fg;
3472 fg = bg;
3473 bg = temp;
3474 }
3475
3476 if((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
3477 colfg.red = fg->color.red / 2;
3478 colfg.green = fg->color.green / 2;
3479 colfg.blue = fg->color.blue / 2;
3480 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3481 fg = &revfg;
3482 }
3483
3484 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3485 fg = bg;
3486
3487 if(base.mode & ATTR_INVISIBLE)
3488 fg = bg;
3489
3490 /* Intelligent cleaning up of the borders. */
3491 if(x == 0) {
3492 xclear(0, (y == 0)? 0 : winy, borderpx,
3493 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3494 }
3495 if(x + charlen >= term.col) {
3496 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3497 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3498 }
3499 if(y == 0)
3500 xclear(winx, 0, winx + width, borderpx);
3501 if(y == term.row-1)
3502 xclear(winx, winy + xw.ch, winx + width, xw.h);
3503
3504 /* Clean up the region we want to draw to. */
3505 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3506
3507 /* Set the clip region because Xft is sometimes dirty. */
3508 r.x = 0;
3509 r.y = 0;
3510 r.height = xw.ch;
3511 r.width = width;
3512 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3513
3514 /* Render the glyphs. */
3515 XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
3516
3517 /* Render underline and strikethrough. */
3518 if(base.mode & ATTR_UNDERLINE) {
3519 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
3520 width, 1);
3521 }
3522
3523 if(base.mode & ATTR_STRUCK) {
3524 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
3525 width, 1);
3526 }
3527
3528 /* Reset clip to none. */
3529 XftDrawSetClip(xw.draw, 0);
3530 }
3531
3532 void
3533 xdrawglyph(Glyph g, int x, int y) {
3534 int numspecs;
3535 XftGlyphFontSpec spec;
3536 numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
3537 xdrawglyphfontspecs(&spec, g, numspecs, x, y);
3538 }
3539
3540 void
3541 xdrawcursor(void) {
3542 static int oldx = 0, oldy = 0;
3543 int curx;
3544 Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs};
3545
3546 LIMIT(oldx, 0, term.col-1);
3547 LIMIT(oldy, 0, term.row-1);
3548
3549 curx = term.c.x;
3550
3551 /* adjust position if in dummy */
3552 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3553 oldx--;
3554 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3555 curx--;
3556
3557 g.u = term.line[term.c.y][term.c.x].u;
3558
3559 /* remove the old cursor */
3560 xdrawglyph(term.line[oldy][oldx], oldx, oldy);
3561
3562 if(IS_SET(MODE_HIDE))
3563 return;
3564
3565 /* draw the new one */
3566 if(xw.state & WIN_FOCUSED) {
3567 switch (xw.cursor) {
3568 case 0: /* Blinking Block */
3569 case 1: /* Blinking Block (Default) */
3570 case 2: /* Steady Block */
3571 if(IS_SET(MODE_REVERSE)) {
3572 g.mode |= ATTR_REVERSE;
3573 g.fg = defaultcs;
3574 g.bg = defaultfg;
3575 }
3576
3577 g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
3578 xdrawglyph(g, term.c.x, term.c.y);
3579 break;
3580 case 3: /* Blinking Underline */
3581 case 4: /* Steady Underline */
3582 XftDrawRect(xw.draw, &dc.col[defaultcs],
3583 borderpx + curx * xw.cw,
3584 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3585 xw.cw, cursorthickness);
3586 break;
3587 case 5: /* Blinking bar */
3588 case 6: /* Steady bar */
3589 XftDrawRect(xw.draw, &dc.col[defaultcs],
3590 borderpx + curx * xw.cw,
3591 borderpx + term.c.y * xw.ch,
3592 cursorthickness, xw.ch);
3593 break;
3594 }
3595 } else {
3596 XftDrawRect(xw.draw, &dc.col[defaultcs],
3597 borderpx + curx * xw.cw,
3598 borderpx + term.c.y * xw.ch,
3599 xw.cw - 1, 1);
3600 XftDrawRect(xw.draw, &dc.col[defaultcs],
3601 borderpx + curx * xw.cw,
3602 borderpx + term.c.y * xw.ch,
3603 1, xw.ch - 1);
3604 XftDrawRect(xw.draw, &dc.col[defaultcs],
3605 borderpx + (curx + 1) * xw.cw - 1,
3606 borderpx + term.c.y * xw.ch,
3607 1, xw.ch - 1);
3608 XftDrawRect(xw.draw, &dc.col[defaultcs],
3609 borderpx + curx * xw.cw,
3610 borderpx + (term.c.y + 1) * xw.ch - 1,
3611 xw.cw, 1);
3612 }
3613 oldx = curx, oldy = term.c.y;
3614 }
3615
3616
3617 void
3618 xsettitle(char *p) {
3619 XTextProperty prop;
3620
3621 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3622 &prop);
3623 XSetWMName(xw.dpy, xw.win, &prop);
3624 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3625 XFree(prop.value);
3626 }
3627
3628 void
3629 xresettitle(void) {
3630 xsettitle(opt_title ? opt_title : "st");
3631 }
3632
3633 void
3634 redraw(void) {
3635 tfulldirt();
3636 draw();
3637 }
3638
3639 void
3640 draw(void) {
3641 drawregion(0, 0, term.col, term.row);
3642 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3643 xw.h, 0, 0);
3644 XSetForeground(xw.dpy, dc.gc,
3645 dc.col[IS_SET(MODE_REVERSE)?
3646 defaultfg : defaultbg].pixel);
3647 }
3648
3649 void
3650 drawregion(int x1, int y1, int x2, int y2) {
3651 int i, x, y, ox, numspecs;
3652 Glyph base, new;
3653 XftGlyphFontSpec* specs;
3654 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3655
3656 if(!(xw.state & WIN_VISIBLE))
3657 return;
3658
3659 for(y = y1; y < y2; y++) {
3660 if(!term.dirty[y])
3661 continue;
3662
3663 xtermclear(0, y, term.col, y);
3664 term.dirty[y] = 0;
3665
3666 specs = term.specbuf;
3667 numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
3668
3669 i = ox = 0;
3670 for(x = x1; x < x2 && i < numspecs; x++) {
3671 new = term.line[y][x];
3672 if(new.mode == ATTR_WDUMMY)
3673 continue;
3674 if(ena_sel && selected(x, y))
3675 new.mode ^= ATTR_REVERSE;
3676 if(i > 0 && ATTRCMP(base, new)) {
3677 xdrawglyphfontspecs(specs, base, i, ox, y);
3678 specs += i;
3679 numspecs -= i;
3680 i = 0;
3681 }
3682 if(i == 0) {
3683 ox = x;
3684 base = new;
3685 }
3686 i++;
3687 }
3688 if(i > 0)
3689 xdrawglyphfontspecs(specs, base, i, ox, y);
3690 }
3691 xdrawcursor();
3692 }
3693
3694 void
3695 expose(XEvent *ev) {
3696 redraw();
3697 }
3698
3699 void
3700 visibility(XEvent *ev) {
3701 XVisibilityEvent *e = &ev->xvisibility;
3702
3703 MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
3704 }
3705
3706 void
3707 unmap(XEvent *ev) {
3708 xw.state &= ~WIN_VISIBLE;
3709 }
3710
3711 void
3712 xsetpointermotion(int set) {
3713 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3714 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3715 }
3716
3717 void
3718 xseturgency(int add) {
3719 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3720
3721 MODBIT(h->flags, add, XUrgencyHint);
3722 XSetWMHints(xw.dpy, xw.win, h);
3723 XFree(h);
3724 }
3725
3726 void
3727 focus(XEvent *ev) {
3728 XFocusChangeEvent *e = &ev->xfocus;
3729
3730 if(e->mode == NotifyGrab)
3731 return;
3732
3733 if(ev->type == FocusIn) {
3734 XSetICFocus(xw.xic);
3735 xw.state |= WIN_FOCUSED;
3736 xseturgency(0);
3737 if(IS_SET(MODE_FOCUS))
3738 ttywrite("\033[I", 3);
3739 } else {
3740 XUnsetICFocus(xw.xic);
3741 xw.state &= ~WIN_FOCUSED;
3742 if(IS_SET(MODE_FOCUS))
3743 ttywrite("\033[O", 3);
3744 }
3745 }
3746
3747 bool
3748 match(uint mask, uint state) {
3749 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3750 }
3751
3752 void
3753 numlock(const Arg *dummy) {
3754 term.numlock ^= 1;
3755 }
3756
3757 char*
3758 kmap(KeySym k, uint state) {
3759 Key *kp;
3760 int i;
3761
3762 /* Check for mapped keys out of X11 function keys. */
3763 for(i = 0; i < LEN(mappedkeys); i++) {
3764 if(mappedkeys[i] == k)
3765 break;
3766 }
3767 if(i == LEN(mappedkeys)) {
3768 if((k & 0xFFFF) < 0xFD00)
3769 return NULL;
3770 }
3771
3772 for(kp = key; kp < key + LEN(key); kp++) {
3773 if(kp->k != k)
3774 continue;
3775
3776 if(!match(kp->mask, state))
3777 continue;
3778
3779 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3780 continue;
3781 if(term.numlock && kp->appkey == 2)
3782 continue;
3783
3784 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3785 continue;
3786
3787 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3788 continue;
3789
3790 return kp->s;
3791 }
3792
3793 return NULL;
3794 }
3795
3796 void
3797 kpress(XEvent *ev) {
3798 XKeyEvent *e = &ev->xkey;
3799 KeySym ksym;
3800 char buf[32], *customkey;
3801 int len;
3802 Rune c;
3803 Status status;
3804 Shortcut *bp;
3805
3806 if(IS_SET(MODE_KBDLOCK))
3807 return;
3808
3809 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3810 /* 1. shortcuts */
3811 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3812 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3813 bp->func(&(bp->arg));
3814 return;
3815 }
3816 }
3817
3818 /* 2. custom keys from config.h */
3819 if((customkey = kmap(ksym, e->state))) {
3820 ttysend(customkey, strlen(customkey));
3821 return;
3822 }
3823
3824 /* 3. composed string from input method */
3825 if(len == 0)
3826 return;
3827 if(len == 1 && e->state & Mod1Mask) {
3828 if(IS_SET(MODE_8BIT)) {
3829 if(*buf < 0177) {
3830 c = *buf | 0x80;
3831 len = utf8encode(c, buf);
3832 }
3833 } else {
3834 buf[1] = buf[0];
3835 buf[0] = '\033';
3836 len = 2;
3837 }
3838 }
3839 ttysend(buf, len);
3840 }
3841
3842
3843 void
3844 cmessage(XEvent *e) {
3845 /*
3846 * See xembed specs
3847 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3848 */
3849 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3850 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3851 xw.state |= WIN_FOCUSED;
3852 xseturgency(0);
3853 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3854 xw.state &= ~WIN_FOCUSED;
3855 }
3856 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3857 /* Send SIGHUP to shell */
3858 kill(pid, SIGHUP);
3859 exit(EXIT_SUCCESS);
3860 }
3861 }
3862
3863 void
3864 cresize(int width, int height) {
3865 int col, row;
3866
3867 if(width != 0)
3868 xw.w = width;
3869 if(height != 0)
3870 xw.h = height;
3871
3872 col = (xw.w - 2 * borderpx) / xw.cw;
3873 row = (xw.h - 2 * borderpx) / xw.ch;
3874
3875 tresize(col, row);
3876 xresize(col, row);
3877 ttyresize();
3878 }
3879
3880 void
3881 resize(XEvent *e) {
3882 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3883 return;
3884
3885 cresize(e->xconfigure.width, e->xconfigure.height);
3886 }
3887
3888 void
3889 run(void) {
3890 XEvent ev;
3891 int w = xw.w, h = xw.h;
3892 fd_set rfd;
3893 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3894 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3895 long deltatime;
3896
3897 /* Waiting for window mapping */
3898 do {
3899 XNextEvent(xw.dpy, &ev);
3900 if(ev.type == ConfigureNotify) {
3901 w = ev.xconfigure.width;
3902 h = ev.xconfigure.height;
3903 }
3904 } while(ev.type != MapNotify);
3905
3906 ttynew();
3907 cresize(w, h);
3908
3909 clock_gettime(CLOCK_MONOTONIC, &last);
3910 lastblink = last;
3911
3912 for(xev = actionfps;;) {
3913 FD_ZERO(&rfd);
3914 FD_SET(cmdfd, &rfd);
3915 FD_SET(xfd, &rfd);
3916
3917 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3918 if(errno == EINTR)
3919 continue;
3920 die("select failed: %s\n", strerror(errno));
3921 }
3922 if(FD_ISSET(cmdfd, &rfd)) {
3923 ttyread();
3924 if(blinktimeout) {
3925 blinkset = tattrset(ATTR_BLINK);
3926 if(!blinkset)
3927 MODBIT(term.mode, 0, MODE_BLINK);
3928 }
3929 }
3930
3931 if(FD_ISSET(xfd, &rfd))
3932 xev = actionfps;
3933
3934 clock_gettime(CLOCK_MONOTONIC, &now);
3935 drawtimeout.tv_sec = 0;
3936 drawtimeout.tv_nsec = (1000 * 1E6)/ xfps;
3937 tv = &drawtimeout;
3938
3939 dodraw = 0;
3940 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3941 tsetdirtattr(ATTR_BLINK);
3942 term.mode ^= MODE_BLINK;
3943 lastblink = now;
3944 dodraw = 1;
3945 }
3946 deltatime = TIMEDIFF(now, last);
3947 if(deltatime > 1000 / (xev ? xfps : actionfps)) {
3948 dodraw = 1;
3949 last = now;
3950 }
3951
3952 if(dodraw) {
3953 while(XPending(xw.dpy)) {
3954 XNextEvent(xw.dpy, &ev);
3955 if(XFilterEvent(&ev, None))
3956 continue;
3957 if(handler[ev.type])
3958 (handler[ev.type])(&ev);
3959 }
3960
3961 draw();
3962 XFlush(xw.dpy);
3963
3964 if(xev && !FD_ISSET(xfd, &rfd))
3965 xev--;
3966 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3967 if(blinkset) {
3968 if(TIMEDIFF(now, lastblink) \
3969 > blinktimeout) {
3970 drawtimeout.tv_nsec = 1000;
3971 } else {
3972 drawtimeout.tv_nsec = (1E6 * \
3973 (blinktimeout - \
3974 TIMEDIFF(now,
3975 lastblink)));
3976 }
3977 drawtimeout.tv_sec = \
3978 drawtimeout.tv_nsec / 1E9;
3979 drawtimeout.tv_nsec %= (long)1E9;
3980 } else {
3981 tv = NULL;
3982 }
3983 }
3984 }
3985 }
3986 }
3987
3988 void
3989 usage(void) {
3990 die("%s " VERSION " (c) 2010-2015 st engineers\n"
3991 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3992 " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
3993 " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3994 " [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
3995 argv0);
3996 }
3997
3998 int
3999 main(int argc, char *argv[]) {
4000 uint cols = 80, rows = 24;
4001
4002 xw.l = xw.t = 0;
4003 xw.isfixed = False;
4004 xw.cursor = 0;
4005
4006 ARGBEGIN {
4007 case 'a':
4008 allowaltscreen = false;
4009 break;
4010 case 'c':
4011 opt_class = EARGF(usage());
4012 break;
4013 case 'e':
4014 if(argc > 0)
4015 --argc, ++argv;
4016 goto run;
4017 case 'f':
4018 opt_font = EARGF(usage());
4019 break;
4020 case 'g':
4021 xw.gm = XParseGeometry(EARGF(usage()),
4022 &xw.l, &xw.t, &cols, &rows);
4023 break;
4024 case 'i':
4025 xw.isfixed = True;
4026 break;
4027 case 'o':
4028 opt_io = EARGF(usage());
4029 break;
4030 case 'l':
4031 opt_line = EARGF(usage());
4032 break;
4033 case 't':
4034 opt_title = EARGF(usage());
4035 break;
4036 case 'w':
4037 opt_embed = EARGF(usage());
4038 break;
4039 case 'v':
4040 default:
4041 usage();
4042 } ARGEND;
4043
4044 run:
4045 if(argc > 0) {
4046 /* eat all remaining arguments */
4047 opt_cmd = argv;
4048 if(!opt_title && !opt_line)
4049 opt_title = basename(xstrdup(argv[0]));
4050 }
4051 setlocale(LC_CTYPE, "");
4052 XSetLocaleModifiers("");
4053 tnew(MAX(cols, 1), MAX(rows, 1));
4054 xinit();
4055 selinit();
4056 run();
4057
4058 return 0;
4059 }
4060