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Fix the new -e handling. An empty cmd has to work for backwards compatibility.
[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.ob.x = -1;
1073 tsetdirt(sel.nb.y, sel.ne.y);
1074 }
1075
1076 void
1077 selrequest(XEvent *e) {
1078 XSelectionRequestEvent *xsre;
1079 XSelectionEvent xev;
1080 Atom xa_targets, string, clipboard;
1081 char *seltext;
1082
1083 xsre = (XSelectionRequestEvent *) e;
1084 xev.type = SelectionNotify;
1085 xev.requestor = xsre->requestor;
1086 xev.selection = xsre->selection;
1087 xev.target = xsre->target;
1088 xev.time = xsre->time;
1089 if (xsre->property == None)
1090 xsre->property = xsre->target;
1091
1092 /* reject */
1093 xev.property = None;
1094
1095 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1096 if(xsre->target == xa_targets) {
1097 /* respond with the supported type */
1098 string = sel.xtarget;
1099 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1100 XA_ATOM, 32, PropModeReplace,
1101 (uchar *) &string, 1);
1102 xev.property = xsre->property;
1103 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1104 /*
1105 * xith XA_STRING non ascii characters may be incorrect in the
1106 * requestor. It is not our problem, use utf8.
1107 */
1108 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1109 if(xsre->selection == XA_PRIMARY) {
1110 seltext = sel.primary;
1111 } else if(xsre->selection == clipboard) {
1112 seltext = sel.clipboard;
1113 } else {
1114 fprintf(stderr,
1115 "Unhandled clipboard selection 0x%lx\n",
1116 xsre->selection);
1117 return;
1118 }
1119 if(seltext != NULL) {
1120 XChangeProperty(xsre->display, xsre->requestor,
1121 xsre->property, xsre->target,
1122 8, PropModeReplace,
1123 (uchar *)seltext, strlen(seltext));
1124 xev.property = xsre->property;
1125 }
1126 }
1127
1128 /* all done, send a notification to the listener */
1129 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1130 fprintf(stderr, "Error sending SelectionNotify event\n");
1131 }
1132
1133 void
1134 xsetsel(char *str, Time t) {
1135 free(sel.primary);
1136 sel.primary = str;
1137
1138 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1139 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1140 selclear(0);
1141 }
1142
1143 void
1144 brelease(XEvent *e) {
1145 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1146 mousereport(e);
1147 return;
1148 }
1149
1150 if(e->xbutton.button == Button2) {
1151 selpaste(NULL);
1152 } else if(e->xbutton.button == Button1) {
1153 if(sel.mode == SEL_READY) {
1154 getbuttoninfo(e);
1155 selcopy(e->xbutton.time);
1156 } else
1157 selclear(NULL);
1158 sel.mode = SEL_IDLE;
1159 tsetdirt(sel.nb.y, sel.ne.y);
1160 }
1161 }
1162
1163 void
1164 bmotion(XEvent *e) {
1165 int oldey, oldex, oldsby, oldsey;
1166
1167 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1168 mousereport(e);
1169 return;
1170 }
1171
1172 if(!sel.mode)
1173 return;
1174
1175 sel.mode = SEL_READY;
1176 oldey = sel.oe.y;
1177 oldex = sel.oe.x;
1178 oldsby = sel.nb.y;
1179 oldsey = sel.ne.y;
1180 getbuttoninfo(e);
1181
1182 if(oldey != sel.oe.y || oldex != sel.oe.x)
1183 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1184 }
1185
1186 void
1187 die(const char *errstr, ...) {
1188 va_list ap;
1189
1190 va_start(ap, errstr);
1191 vfprintf(stderr, errstr, ap);
1192 va_end(ap);
1193 exit(EXIT_FAILURE);
1194 }
1195
1196 void
1197 execsh(void) {
1198 char **args, *sh, *prog;
1199 const struct passwd *pw;
1200 char buf[sizeof(long) * 8 + 1];
1201
1202 errno = 0;
1203 if((pw = getpwuid(getuid())) == NULL) {
1204 if(errno)
1205 die("getpwuid:%s\n", strerror(errno));
1206 else
1207 die("who are you?\n");
1208 }
1209
1210 if (!(sh = getenv("SHELL"))) {
1211 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1212 }
1213
1214 if(opt_cmd)
1215 prog = opt_cmd[0];
1216 else if(utmp)
1217 prog = utmp;
1218 else
1219 prog = sh;
1220 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1221
1222 snprintf(buf, sizeof(buf), "%lu", xw.win);
1223
1224 unsetenv("COLUMNS");
1225 unsetenv("LINES");
1226 unsetenv("TERMCAP");
1227 setenv("LOGNAME", pw->pw_name, 1);
1228 setenv("USER", pw->pw_name, 1);
1229 setenv("SHELL", sh, 1);
1230 setenv("HOME", pw->pw_dir, 1);
1231 setenv("TERM", termname, 1);
1232 setenv("WINDOWID", buf, 1);
1233
1234 signal(SIGCHLD, SIG_DFL);
1235 signal(SIGHUP, SIG_DFL);
1236 signal(SIGINT, SIG_DFL);
1237 signal(SIGQUIT, SIG_DFL);
1238 signal(SIGTERM, SIG_DFL);
1239 signal(SIGALRM, SIG_DFL);
1240
1241 execvp(prog, args);
1242 _exit(EXIT_FAILURE);
1243 }
1244
1245 void
1246 sigchld(int a) {
1247 int stat, ret;
1248 pid_t p;
1249
1250 if((p = waitpid(pid, &stat, WNOHANG)) < 0)
1251 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1252
1253 if(pid != p)
1254 return;
1255
1256 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1257 if (ret != EXIT_SUCCESS)
1258 die("child finished with error '%d'\n", stat);
1259 exit(EXIT_SUCCESS);
1260 }
1261
1262
1263 void
1264 stty(void)
1265 {
1266 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1267 size_t n, siz;
1268
1269 if((n = strlen(stty_args)) > sizeof(cmd)-1)
1270 die("incorrect stty parameters\n");
1271 memcpy(cmd, stty_args, n);
1272 q = cmd + n;
1273 siz = sizeof(cmd) - n;
1274 for(p = opt_cmd; p && (s = *p); ++p) {
1275 if((n = strlen(s)) > siz-1)
1276 die("stty parameter length too long\n");
1277 *q++ = ' ';
1278 q = memcpy(q, s, n);
1279 q += n;
1280 siz-= n + 1;
1281 }
1282 *q = '\0';
1283 if (system(cmd) != 0)
1284 perror("Couldn't call stty");
1285 }
1286
1287 void
1288 ttynew(void) {
1289 int m, s;
1290 struct winsize w = {term.row, term.col, 0, 0};
1291
1292 if(opt_io) {
1293 term.mode |= MODE_PRINT;
1294 iofd = (!strcmp(opt_io, "-")) ?
1295 STDOUT_FILENO :
1296 open(opt_io, O_WRONLY | O_CREAT, 0666);
1297 if(iofd < 0) {
1298 fprintf(stderr, "Error opening %s:%s\n",
1299 opt_io, strerror(errno));
1300 }
1301 }
1302
1303 if (opt_line) {
1304 if((cmdfd = open(opt_line, O_RDWR)) < 0)
1305 die("open line failed: %s\n", strerror(errno));
1306 close(STDIN_FILENO);
1307 dup(cmdfd);
1308 stty();
1309 return;
1310 }
1311
1312 /* seems to work fine on linux, openbsd and freebsd */
1313 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1314 die("openpty failed: %s\n", strerror(errno));
1315
1316 switch(pid = fork()) {
1317 case -1:
1318 die("fork failed\n");
1319 break;
1320 case 0:
1321 close(iofd);
1322 setsid(); /* create a new process group */
1323 dup2(s, STDIN_FILENO);
1324 dup2(s, STDOUT_FILENO);
1325 dup2(s, STDERR_FILENO);
1326 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1327 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1328 close(s);
1329 close(m);
1330 execsh();
1331 break;
1332 default:
1333 close(s);
1334 cmdfd = m;
1335 signal(SIGCHLD, sigchld);
1336 break;
1337 }
1338 }
1339
1340 void
1341 ttyread(void) {
1342 static char buf[BUFSIZ];
1343 static int buflen = 0;
1344 char *ptr;
1345 int charsize; /* size of utf8 char in bytes */
1346 Rune unicodep;
1347 int ret;
1348
1349 /* append read bytes to unprocessed bytes */
1350 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1351 die("Couldn't read from shell: %s\n", strerror(errno));
1352
1353 /* process every complete utf8 char */
1354 buflen += ret;
1355 ptr = buf;
1356 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1357 tputc(unicodep);
1358 ptr += charsize;
1359 buflen -= charsize;
1360 }
1361
1362 /* keep any uncomplete utf8 char for the next call */
1363 memmove(buf, ptr, buflen);
1364 }
1365
1366 void
1367 ttywrite(const char *s, size_t n) {
1368 if(xwrite(cmdfd, s, n) == -1)
1369 die("write error on tty: %s\n", strerror(errno));
1370 }
1371
1372 void
1373 ttysend(char *s, size_t n) {
1374 int len;
1375 Rune u;
1376
1377 ttywrite(s, n);
1378 if(IS_SET(MODE_ECHO))
1379 while((len = utf8decode(s, &u, n)) > 0) {
1380 techo(u);
1381 n -= len;
1382 s += len;
1383 }
1384 }
1385
1386 void
1387 ttyresize(void) {
1388 struct winsize w;
1389
1390 w.ws_row = term.row;
1391 w.ws_col = term.col;
1392 w.ws_xpixel = xw.tw;
1393 w.ws_ypixel = xw.th;
1394 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1395 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1396 }
1397
1398 int
1399 tattrset(int attr) {
1400 int i, j;
1401
1402 for(i = 0; i < term.row-1; i++) {
1403 for(j = 0; j < term.col-1; j++) {
1404 if(term.line[i][j].mode & attr)
1405 return 1;
1406 }
1407 }
1408
1409 return 0;
1410 }
1411
1412 void
1413 tsetdirt(int top, int bot) {
1414 int i;
1415
1416 LIMIT(top, 0, term.row-1);
1417 LIMIT(bot, 0, term.row-1);
1418
1419 for(i = top; i <= bot; i++)
1420 term.dirty[i] = 1;
1421 }
1422
1423 void
1424 tsetdirtattr(int attr) {
1425 int i, j;
1426
1427 for(i = 0; i < term.row-1; i++) {
1428 for(j = 0; j < term.col-1; j++) {
1429 if(term.line[i][j].mode & attr) {
1430 tsetdirt(i, i);
1431 break;
1432 }
1433 }
1434 }
1435 }
1436
1437 void
1438 tfulldirt(void) {
1439 tsetdirt(0, term.row-1);
1440 }
1441
1442 void
1443 tcursor(int mode) {
1444 static TCursor c[2];
1445 bool alt = IS_SET(MODE_ALTSCREEN);
1446
1447 if(mode == CURSOR_SAVE) {
1448 c[alt] = term.c;
1449 } else if(mode == CURSOR_LOAD) {
1450 term.c = c[alt];
1451 tmoveto(c[alt].x, c[alt].y);
1452 }
1453 }
1454
1455 void
1456 treset(void) {
1457 uint i;
1458
1459 term.c = (TCursor){{
1460 .mode = ATTR_NULL,
1461 .fg = defaultfg,
1462 .bg = defaultbg
1463 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1464
1465 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1466 for(i = tabspaces; i < term.col; i += tabspaces)
1467 term.tabs[i] = 1;
1468 term.top = 0;
1469 term.bot = term.row - 1;
1470 term.mode = MODE_WRAP;
1471 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1472 term.charset = 0;
1473
1474 for(i = 0; i < 2; i++) {
1475 tmoveto(0, 0);
1476 tcursor(CURSOR_SAVE);
1477 tclearregion(0, 0, term.col-1, term.row-1);
1478 tswapscreen();
1479 }
1480 }
1481
1482 void
1483 tnew(int col, int row) {
1484 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1485 tresize(col, row);
1486 term.numlock = 1;
1487
1488 treset();
1489 }
1490
1491 void
1492 tswapscreen(void) {
1493 Line *tmp = term.line;
1494
1495 term.line = term.alt;
1496 term.alt = tmp;
1497 term.mode ^= MODE_ALTSCREEN;
1498 tfulldirt();
1499 }
1500
1501 void
1502 tscrolldown(int orig, int n) {
1503 int i;
1504 Line temp;
1505
1506 LIMIT(n, 0, term.bot-orig+1);
1507
1508 tsetdirt(orig, term.bot-n);
1509 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1510
1511 for(i = term.bot; i >= orig+n; i--) {
1512 temp = term.line[i];
1513 term.line[i] = term.line[i-n];
1514 term.line[i-n] = temp;
1515 }
1516
1517 selscroll(orig, n);
1518 }
1519
1520 void
1521 tscrollup(int orig, int n) {
1522 int i;
1523 Line temp;
1524
1525 LIMIT(n, 0, term.bot-orig+1);
1526
1527 tclearregion(0, orig, term.col-1, orig+n-1);
1528 tsetdirt(orig+n, term.bot);
1529
1530 for(i = orig; i <= term.bot-n; i++) {
1531 temp = term.line[i];
1532 term.line[i] = term.line[i+n];
1533 term.line[i+n] = temp;
1534 }
1535
1536 selscroll(orig, -n);
1537 }
1538
1539 void
1540 selscroll(int orig, int n) {
1541 if(sel.ob.x == -1)
1542 return;
1543
1544 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1545 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1546 selclear(NULL);
1547 return;
1548 }
1549 if(sel.type == SEL_RECTANGULAR) {
1550 if(sel.ob.y < term.top)
1551 sel.ob.y = term.top;
1552 if(sel.oe.y > term.bot)
1553 sel.oe.y = term.bot;
1554 } else {
1555 if(sel.ob.y < term.top) {
1556 sel.ob.y = term.top;
1557 sel.ob.x = 0;
1558 }
1559 if(sel.oe.y > term.bot) {
1560 sel.oe.y = term.bot;
1561 sel.oe.x = term.col;
1562 }
1563 }
1564 selnormalize();
1565 }
1566 }
1567
1568 void
1569 tnewline(int first_col) {
1570 int y = term.c.y;
1571
1572 if(y == term.bot) {
1573 tscrollup(term.top, 1);
1574 } else {
1575 y++;
1576 }
1577 tmoveto(first_col ? 0 : term.c.x, y);
1578 }
1579
1580 void
1581 csiparse(void) {
1582 char *p = csiescseq.buf, *np;
1583 long int v;
1584
1585 csiescseq.narg = 0;
1586 if(*p == '?') {
1587 csiescseq.priv = 1;
1588 p++;
1589 }
1590
1591 csiescseq.buf[csiescseq.len] = '\0';
1592 while(p < csiescseq.buf+csiescseq.len) {
1593 np = NULL;
1594 v = strtol(p, &np, 10);
1595 if(np == p)
1596 v = 0;
1597 if(v == LONG_MAX || v == LONG_MIN)
1598 v = -1;
1599 csiescseq.arg[csiescseq.narg++] = v;
1600 p = np;
1601 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1602 break;
1603 p++;
1604 }
1605 csiescseq.mode[0] = *p++;
1606 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1607 }
1608
1609 /* for absolute user moves, when decom is set */
1610 void
1611 tmoveato(int x, int y) {
1612 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1613 }
1614
1615 void
1616 tmoveto(int x, int y) {
1617 int miny, maxy;
1618
1619 if(term.c.state & CURSOR_ORIGIN) {
1620 miny = term.top;
1621 maxy = term.bot;
1622 } else {
1623 miny = 0;
1624 maxy = term.row - 1;
1625 }
1626 term.c.state &= ~CURSOR_WRAPNEXT;
1627 term.c.x = LIMIT(x, 0, term.col-1);
1628 term.c.y = LIMIT(y, miny, maxy);
1629 }
1630
1631 void
1632 tsetchar(Rune u, Glyph *attr, int x, int y) {
1633 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1634 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1635 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1636 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1637 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1638 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1639 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1640 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1641 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1642 };
1643
1644 /*
1645 * The table is proudly stolen from rxvt.
1646 */
1647 if(term.trantbl[term.charset] == CS_GRAPHIC0 &&
1648 BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
1649 utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
1650
1651 if(term.line[y][x].mode & ATTR_WIDE) {
1652 if(x+1 < term.col) {
1653 term.line[y][x+1].u = ' ';
1654 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1655 }
1656 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1657 term.line[y][x-1].u = ' ';
1658 term.line[y][x-1].mode &= ~ATTR_WIDE;
1659 }
1660
1661 term.dirty[y] = 1;
1662 term.line[y][x] = *attr;
1663 term.line[y][x].u = u;
1664 }
1665
1666 void
1667 tclearregion(int x1, int y1, int x2, int y2) {
1668 int x, y, temp;
1669 Glyph *gp;
1670
1671 if(x1 > x2)
1672 temp = x1, x1 = x2, x2 = temp;
1673 if(y1 > y2)
1674 temp = y1, y1 = y2, y2 = temp;
1675
1676 LIMIT(x1, 0, term.col-1);
1677 LIMIT(x2, 0, term.col-1);
1678 LIMIT(y1, 0, term.row-1);
1679 LIMIT(y2, 0, term.row-1);
1680
1681 for(y = y1; y <= y2; y++) {
1682 term.dirty[y] = 1;
1683 for(x = x1; x <= x2; x++) {
1684 gp = &term.line[y][x];
1685 if(selected(x, y))
1686 selclear(NULL);
1687 gp->fg = term.c.attr.fg;
1688 gp->bg = term.c.attr.bg;
1689 gp->mode = 0;
1690 gp->u = ' ';
1691 }
1692 }
1693 }
1694
1695 void
1696 tdeletechar(int n) {
1697 int dst, src, size;
1698 Glyph *line;
1699
1700 LIMIT(n, 0, term.col - term.c.x);
1701
1702 dst = term.c.x;
1703 src = term.c.x + n;
1704 size = term.col - src;
1705 line = term.line[term.c.y];
1706
1707 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1708 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1709 }
1710
1711 void
1712 tinsertblank(int n) {
1713 int dst, src, size;
1714 Glyph *line;
1715
1716 LIMIT(n, 0, term.col - term.c.x);
1717
1718 dst = term.c.x + n;
1719 src = term.c.x;
1720 size = term.col - dst;
1721 line = term.line[term.c.y];
1722
1723 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1724 tclearregion(src, term.c.y, dst - 1, term.c.y);
1725 }
1726
1727 void
1728 tinsertblankline(int n) {
1729 if(BETWEEN(term.c.y, term.top, term.bot))
1730 tscrolldown(term.c.y, n);
1731 }
1732
1733 void
1734 tdeleteline(int n) {
1735 if(BETWEEN(term.c.y, term.top, term.bot))
1736 tscrollup(term.c.y, n);
1737 }
1738
1739 int32_t
1740 tdefcolor(int *attr, int *npar, int l) {
1741 int32_t idx = -1;
1742 uint r, g, b;
1743
1744 switch (attr[*npar + 1]) {
1745 case 2: /* direct color in RGB space */
1746 if (*npar + 4 >= l) {
1747 fprintf(stderr,
1748 "erresc(38): Incorrect number of parameters (%d)\n",
1749 *npar);
1750 break;
1751 }
1752 r = attr[*npar + 2];
1753 g = attr[*npar + 3];
1754 b = attr[*npar + 4];
1755 *npar += 4;
1756 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1757 fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
1758 r, g, b);
1759 else
1760 idx = TRUECOLOR(r, g, b);
1761 break;
1762 case 5: /* indexed color */
1763 if (*npar + 2 >= l) {
1764 fprintf(stderr,
1765 "erresc(38): Incorrect number of parameters (%d)\n",
1766 *npar);
1767 break;
1768 }
1769 *npar += 2;
1770 if(!BETWEEN(attr[*npar], 0, 255))
1771 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1772 else
1773 idx = attr[*npar];
1774 break;
1775 case 0: /* implemented defined (only foreground) */
1776 case 1: /* transparent */
1777 case 3: /* direct color in CMY space */
1778 case 4: /* direct color in CMYK space */
1779 default:
1780 fprintf(stderr,
1781 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1782 break;
1783 }
1784
1785 return idx;
1786 }
1787
1788 void
1789 tsetattr(int *attr, int l) {
1790 int i;
1791 int32_t idx;
1792
1793 for(i = 0; i < l; i++) {
1794 switch(attr[i]) {
1795 case 0:
1796 term.c.attr.mode &= ~(
1797 ATTR_BOLD |
1798 ATTR_FAINT |
1799 ATTR_ITALIC |
1800 ATTR_UNDERLINE |
1801 ATTR_BLINK |
1802 ATTR_REVERSE |
1803 ATTR_INVISIBLE |
1804 ATTR_STRUCK );
1805 term.c.attr.fg = defaultfg;
1806 term.c.attr.bg = defaultbg;
1807 break;
1808 case 1:
1809 term.c.attr.mode |= ATTR_BOLD;
1810 break;
1811 case 2:
1812 term.c.attr.mode |= ATTR_FAINT;
1813 break;
1814 case 3:
1815 term.c.attr.mode |= ATTR_ITALIC;
1816 break;
1817 case 4:
1818 term.c.attr.mode |= ATTR_UNDERLINE;
1819 break;
1820 case 5: /* slow blink */
1821 /* FALLTHROUGH */
1822 case 6: /* rapid blink */
1823 term.c.attr.mode |= ATTR_BLINK;
1824 break;
1825 case 7:
1826 term.c.attr.mode |= ATTR_REVERSE;
1827 break;
1828 case 8:
1829 term.c.attr.mode |= ATTR_INVISIBLE;
1830 break;
1831 case 9:
1832 term.c.attr.mode |= ATTR_STRUCK;
1833 break;
1834 case 22:
1835 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1836 break;
1837 case 23:
1838 term.c.attr.mode &= ~ATTR_ITALIC;
1839 break;
1840 case 24:
1841 term.c.attr.mode &= ~ATTR_UNDERLINE;
1842 break;
1843 case 25:
1844 term.c.attr.mode &= ~ATTR_BLINK;
1845 break;
1846 case 27:
1847 term.c.attr.mode &= ~ATTR_REVERSE;
1848 break;
1849 case 28:
1850 term.c.attr.mode &= ~ATTR_INVISIBLE;
1851 break;
1852 case 29:
1853 term.c.attr.mode &= ~ATTR_STRUCK;
1854 break;
1855 case 38:
1856 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1857 term.c.attr.fg = idx;
1858 break;
1859 case 39:
1860 term.c.attr.fg = defaultfg;
1861 break;
1862 case 48:
1863 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1864 term.c.attr.bg = idx;
1865 break;
1866 case 49:
1867 term.c.attr.bg = defaultbg;
1868 break;
1869 default:
1870 if(BETWEEN(attr[i], 30, 37)) {
1871 term.c.attr.fg = attr[i] - 30;
1872 } else if(BETWEEN(attr[i], 40, 47)) {
1873 term.c.attr.bg = attr[i] - 40;
1874 } else if(BETWEEN(attr[i], 90, 97)) {
1875 term.c.attr.fg = attr[i] - 90 + 8;
1876 } else if(BETWEEN(attr[i], 100, 107)) {
1877 term.c.attr.bg = attr[i] - 100 + 8;
1878 } else {
1879 fprintf(stderr,
1880 "erresc(default): gfx attr %d unknown\n",
1881 attr[i]), csidump();
1882 }
1883 break;
1884 }
1885 }
1886 }
1887
1888 void
1889 tsetscroll(int t, int b) {
1890 int temp;
1891
1892 LIMIT(t, 0, term.row-1);
1893 LIMIT(b, 0, term.row-1);
1894 if(t > b) {
1895 temp = t;
1896 t = b;
1897 b = temp;
1898 }
1899 term.top = t;
1900 term.bot = b;
1901 }
1902
1903 void
1904 tsetmode(bool priv, bool set, int *args, int narg) {
1905 int *lim, mode;
1906 bool alt;
1907
1908 for(lim = args + narg; args < lim; ++args) {
1909 if(priv) {
1910 switch(*args) {
1911 case 1: /* DECCKM -- Cursor key */
1912 MODBIT(term.mode, set, MODE_APPCURSOR);
1913 break;
1914 case 5: /* DECSCNM -- Reverse video */
1915 mode = term.mode;
1916 MODBIT(term.mode, set, MODE_REVERSE);
1917 if(mode != term.mode)
1918 redraw();
1919 break;
1920 case 6: /* DECOM -- Origin */
1921 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1922 tmoveato(0, 0);
1923 break;
1924 case 7: /* DECAWM -- Auto wrap */
1925 MODBIT(term.mode, set, MODE_WRAP);
1926 break;
1927 case 0: /* Error (IGNORED) */
1928 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1929 case 3: /* DECCOLM -- Column (IGNORED) */
1930 case 4: /* DECSCLM -- Scroll (IGNORED) */
1931 case 8: /* DECARM -- Auto repeat (IGNORED) */
1932 case 18: /* DECPFF -- Printer feed (IGNORED) */
1933 case 19: /* DECPEX -- Printer extent (IGNORED) */
1934 case 42: /* DECNRCM -- National characters (IGNORED) */
1935 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1936 break;
1937 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1938 MODBIT(term.mode, !set, MODE_HIDE);
1939 break;
1940 case 9: /* X10 mouse compatibility mode */
1941 xsetpointermotion(0);
1942 MODBIT(term.mode, 0, MODE_MOUSE);
1943 MODBIT(term.mode, set, MODE_MOUSEX10);
1944 break;
1945 case 1000: /* 1000: report button press */
1946 xsetpointermotion(0);
1947 MODBIT(term.mode, 0, MODE_MOUSE);
1948 MODBIT(term.mode, set, MODE_MOUSEBTN);
1949 break;
1950 case 1002: /* 1002: report motion on button press */
1951 xsetpointermotion(0);
1952 MODBIT(term.mode, 0, MODE_MOUSE);
1953 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1954 break;
1955 case 1003: /* 1003: enable all mouse motions */
1956 xsetpointermotion(set);
1957 MODBIT(term.mode, 0, MODE_MOUSE);
1958 MODBIT(term.mode, set, MODE_MOUSEMANY);
1959 break;
1960 case 1004: /* 1004: send focus events to tty */
1961 MODBIT(term.mode, set, MODE_FOCUS);
1962 break;
1963 case 1006: /* 1006: extended reporting mode */
1964 MODBIT(term.mode, set, MODE_MOUSESGR);
1965 break;
1966 case 1034:
1967 MODBIT(term.mode, set, MODE_8BIT);
1968 break;
1969 case 1049: /* swap screen & set/restore cursor as xterm */
1970 if (!allowaltscreen)
1971 break;
1972 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1973 /* FALLTHROUGH */
1974 case 47: /* swap screen */
1975 case 1047:
1976 if (!allowaltscreen)
1977 break;
1978 alt = IS_SET(MODE_ALTSCREEN);
1979 if(alt) {
1980 tclearregion(0, 0, term.col-1,
1981 term.row-1);
1982 }
1983 if(set ^ alt) /* set is always 1 or 0 */
1984 tswapscreen();
1985 if(*args != 1049)
1986 break;
1987 /* FALLTHROUGH */
1988 case 1048:
1989 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1990 break;
1991 case 2004: /* 2004: bracketed paste mode */
1992 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1993 break;
1994 /* Not implemented mouse modes. See comments there. */
1995 case 1001: /* mouse highlight mode; can hang the
1996 terminal by design when implemented. */
1997 case 1005: /* UTF-8 mouse mode; will confuse
1998 applications not supporting UTF-8
1999 and luit. */
2000 case 1015: /* urxvt mangled mouse mode; incompatible
2001 and can be mistaken for other control
2002 codes. */
2003 default:
2004 fprintf(stderr,
2005 "erresc: unknown private set/reset mode %d\n",
2006 *args);
2007 break;
2008 }
2009 } else {
2010 switch(*args) {
2011 case 0: /* Error (IGNORED) */
2012 break;
2013 case 2: /* KAM -- keyboard action */
2014 MODBIT(term.mode, set, MODE_KBDLOCK);
2015 break;
2016 case 4: /* IRM -- Insertion-replacement */
2017 MODBIT(term.mode, set, MODE_INSERT);
2018 break;
2019 case 12: /* SRM -- Send/Receive */
2020 MODBIT(term.mode, !set, MODE_ECHO);
2021 break;
2022 case 20: /* LNM -- Linefeed/new line */
2023 MODBIT(term.mode, set, MODE_CRLF);
2024 break;
2025 default:
2026 fprintf(stderr,
2027 "erresc: unknown set/reset mode %d\n",
2028 *args);
2029 break;
2030 }
2031 }
2032 }
2033 }
2034
2035 void
2036 csihandle(void) {
2037 char buf[40];
2038 int len;
2039
2040 switch(csiescseq.mode[0]) {
2041 default:
2042 unknown:
2043 fprintf(stderr, "erresc: unknown csi ");
2044 csidump();
2045 /* die(""); */
2046 break;
2047 case '@': /* ICH -- Insert <n> blank char */
2048 DEFAULT(csiescseq.arg[0], 1);
2049 tinsertblank(csiescseq.arg[0]);
2050 break;
2051 case 'A': /* CUU -- Cursor <n> Up */
2052 DEFAULT(csiescseq.arg[0], 1);
2053 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2054 break;
2055 case 'B': /* CUD -- Cursor <n> Down */
2056 case 'e': /* VPR --Cursor <n> Down */
2057 DEFAULT(csiescseq.arg[0], 1);
2058 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2059 break;
2060 case 'i': /* MC -- Media Copy */
2061 switch(csiescseq.arg[0]) {
2062 case 0:
2063 tdump();
2064 break;
2065 case 1:
2066 tdumpline(term.c.y);
2067 break;
2068 case 2:
2069 tdumpsel();
2070 break;
2071 case 4:
2072 term.mode &= ~MODE_PRINT;
2073 break;
2074 case 5:
2075 term.mode |= MODE_PRINT;
2076 break;
2077 }
2078 break;
2079 case 'c': /* DA -- Device Attributes */
2080 if(csiescseq.arg[0] == 0)
2081 ttywrite(vtiden, sizeof(vtiden) - 1);
2082 break;
2083 case 'C': /* CUF -- Cursor <n> Forward */
2084 case 'a': /* HPR -- Cursor <n> Forward */
2085 DEFAULT(csiescseq.arg[0], 1);
2086 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2087 break;
2088 case 'D': /* CUB -- Cursor <n> Backward */
2089 DEFAULT(csiescseq.arg[0], 1);
2090 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2091 break;
2092 case 'E': /* CNL -- Cursor <n> Down and first col */
2093 DEFAULT(csiescseq.arg[0], 1);
2094 tmoveto(0, term.c.y+csiescseq.arg[0]);
2095 break;
2096 case 'F': /* CPL -- Cursor <n> Up and first col */
2097 DEFAULT(csiescseq.arg[0], 1);
2098 tmoveto(0, term.c.y-csiescseq.arg[0]);
2099 break;
2100 case 'g': /* TBC -- Tabulation clear */
2101 switch(csiescseq.arg[0]) {
2102 case 0: /* clear current tab stop */
2103 term.tabs[term.c.x] = 0;
2104 break;
2105 case 3: /* clear all the tabs */
2106 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2107 break;
2108 default:
2109 goto unknown;
2110 }
2111 break;
2112 case 'G': /* CHA -- Move to <col> */
2113 case '`': /* HPA */
2114 DEFAULT(csiescseq.arg[0], 1);
2115 tmoveto(csiescseq.arg[0]-1, term.c.y);
2116 break;
2117 case 'H': /* CUP -- Move to <row> <col> */
2118 case 'f': /* HVP */
2119 DEFAULT(csiescseq.arg[0], 1);
2120 DEFAULT(csiescseq.arg[1], 1);
2121 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2122 break;
2123 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2124 DEFAULT(csiescseq.arg[0], 1);
2125 tputtab(csiescseq.arg[0]);
2126 break;
2127 case 'J': /* ED -- Clear screen */
2128 selclear(NULL);
2129 switch(csiescseq.arg[0]) {
2130 case 0: /* below */
2131 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2132 if(term.c.y < term.row-1) {
2133 tclearregion(0, term.c.y+1, term.col-1,
2134 term.row-1);
2135 }
2136 break;
2137 case 1: /* above */
2138 if(term.c.y > 1)
2139 tclearregion(0, 0, term.col-1, term.c.y-1);
2140 tclearregion(0, term.c.y, term.c.x, term.c.y);
2141 break;
2142 case 2: /* all */
2143 tclearregion(0, 0, term.col-1, term.row-1);
2144 break;
2145 default:
2146 goto unknown;
2147 }
2148 break;
2149 case 'K': /* EL -- Clear line */
2150 switch(csiescseq.arg[0]) {
2151 case 0: /* right */
2152 tclearregion(term.c.x, term.c.y, term.col-1,
2153 term.c.y);
2154 break;
2155 case 1: /* left */
2156 tclearregion(0, term.c.y, term.c.x, term.c.y);
2157 break;
2158 case 2: /* all */
2159 tclearregion(0, term.c.y, term.col-1, term.c.y);
2160 break;
2161 }
2162 break;
2163 case 'S': /* SU -- Scroll <n> line up */
2164 DEFAULT(csiescseq.arg[0], 1);
2165 tscrollup(term.top, csiescseq.arg[0]);
2166 break;
2167 case 'T': /* SD -- Scroll <n> line down */
2168 DEFAULT(csiescseq.arg[0], 1);
2169 tscrolldown(term.top, csiescseq.arg[0]);
2170 break;
2171 case 'L': /* IL -- Insert <n> blank lines */
2172 DEFAULT(csiescseq.arg[0], 1);
2173 tinsertblankline(csiescseq.arg[0]);
2174 break;
2175 case 'l': /* RM -- Reset Mode */
2176 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2177 break;
2178 case 'M': /* DL -- Delete <n> lines */
2179 DEFAULT(csiescseq.arg[0], 1);
2180 tdeleteline(csiescseq.arg[0]);
2181 break;
2182 case 'X': /* ECH -- Erase <n> char */
2183 DEFAULT(csiescseq.arg[0], 1);
2184 tclearregion(term.c.x, term.c.y,
2185 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2186 break;
2187 case 'P': /* DCH -- Delete <n> char */
2188 DEFAULT(csiescseq.arg[0], 1);
2189 tdeletechar(csiescseq.arg[0]);
2190 break;
2191 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2192 DEFAULT(csiescseq.arg[0], 1);
2193 tputtab(-csiescseq.arg[0]);
2194 break;
2195 case 'd': /* VPA -- Move to <row> */
2196 DEFAULT(csiescseq.arg[0], 1);
2197 tmoveato(term.c.x, csiescseq.arg[0]-1);
2198 break;
2199 case 'h': /* SM -- Set terminal mode */
2200 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2201 break;
2202 case 'm': /* SGR -- Terminal attribute (color) */
2203 tsetattr(csiescseq.arg, csiescseq.narg);
2204 break;
2205 case 'n': /* DSR – Device Status Report (cursor position) */
2206 if (csiescseq.arg[0] == 6) {
2207 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2208 term.c.y+1, term.c.x+1);
2209 ttywrite(buf, len);
2210 }
2211 break;
2212 case 'r': /* DECSTBM -- Set Scrolling Region */
2213 if(csiescseq.priv) {
2214 goto unknown;
2215 } else {
2216 DEFAULT(csiescseq.arg[0], 1);
2217 DEFAULT(csiescseq.arg[1], term.row);
2218 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2219 tmoveato(0, 0);
2220 }
2221 break;
2222 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2223 tcursor(CURSOR_SAVE);
2224 break;
2225 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2226 tcursor(CURSOR_LOAD);
2227 break;
2228 case ' ':
2229 switch (csiescseq.mode[1]) {
2230 case 'q': /* DECSCUSR -- Set Cursor Style */
2231 DEFAULT(csiescseq.arg[0], 1);
2232 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2233 goto unknown;
2234 }
2235 xw.cursor = csiescseq.arg[0];
2236 break;
2237 default:
2238 goto unknown;
2239 }
2240 break;
2241 }
2242 }
2243
2244 void
2245 csidump(void) {
2246 int i;
2247 uint c;
2248
2249 printf("ESC[");
2250 for(i = 0; i < csiescseq.len; i++) {
2251 c = csiescseq.buf[i] & 0xff;
2252 if(isprint(c)) {
2253 putchar(c);
2254 } else if(c == '\n') {
2255 printf("(\\n)");
2256 } else if(c == '\r') {
2257 printf("(\\r)");
2258 } else if(c == 0x1b) {
2259 printf("(\\e)");
2260 } else {
2261 printf("(%02x)", c);
2262 }
2263 }
2264 putchar('\n');
2265 }
2266
2267 void
2268 csireset(void) {
2269 memset(&csiescseq, 0, sizeof(csiescseq));
2270 }
2271
2272 void
2273 strhandle(void) {
2274 char *p = NULL;
2275 int j, narg, par;
2276
2277 term.esc &= ~(ESC_STR_END|ESC_STR);
2278 strparse();
2279 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2280
2281 switch(strescseq.type) {
2282 case ']': /* OSC -- Operating System Command */
2283 switch(par) {
2284 case 0:
2285 case 1:
2286 case 2:
2287 if(narg > 1)
2288 xsettitle(strescseq.args[1]);
2289 return;
2290 case 4: /* color set */
2291 if(narg < 3)
2292 break;
2293 p = strescseq.args[2];
2294 /* FALLTHROUGH */
2295 case 104: /* color reset, here p = NULL */
2296 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2297 if(xsetcolorname(j, p)) {
2298 fprintf(stderr, "erresc: invalid color %s\n", p);
2299 } else {
2300 /*
2301 * TODO if defaultbg color is changed, borders
2302 * are dirty
2303 */
2304 redraw();
2305 }
2306 return;
2307 }
2308 break;
2309 case 'k': /* old title set compatibility */
2310 xsettitle(strescseq.args[0]);
2311 return;
2312 case 'P': /* DCS -- Device Control String */
2313 case '_': /* APC -- Application Program Command */
2314 case '^': /* PM -- Privacy Message */
2315 return;
2316 }
2317
2318 fprintf(stderr, "erresc: unknown str ");
2319 strdump();
2320 }
2321
2322 void
2323 strparse(void) {
2324 int c;
2325 char *p = strescseq.buf;
2326
2327 strescseq.narg = 0;
2328 strescseq.buf[strescseq.len] = '\0';
2329
2330 if(*p == '\0')
2331 return;
2332
2333 while(strescseq.narg < STR_ARG_SIZ) {
2334 strescseq.args[strescseq.narg++] = p;
2335 while((c = *p) != ';' && c != '\0')
2336 ++p;
2337 if(c == '\0')
2338 return;
2339 *p++ = '\0';
2340 }
2341 }
2342
2343 void
2344 strdump(void) {
2345 int i;
2346 uint c;
2347
2348 printf("ESC%c", strescseq.type);
2349 for(i = 0; i < strescseq.len; i++) {
2350 c = strescseq.buf[i] & 0xff;
2351 if(c == '\0') {
2352 return;
2353 } else if(isprint(c)) {
2354 putchar(c);
2355 } else if(c == '\n') {
2356 printf("(\\n)");
2357 } else if(c == '\r') {
2358 printf("(\\r)");
2359 } else if(c == 0x1b) {
2360 printf("(\\e)");
2361 } else {
2362 printf("(%02x)", c);
2363 }
2364 }
2365 printf("ESC\\\n");
2366 }
2367
2368 void
2369 strreset(void) {
2370 memset(&strescseq, 0, sizeof(strescseq));
2371 }
2372
2373 void
2374 tprinter(char *s, size_t len) {
2375 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2376 fprintf(stderr, "Error writing in %s:%s\n",
2377 opt_io, strerror(errno));
2378 close(iofd);
2379 iofd = -1;
2380 }
2381 }
2382
2383 void
2384 toggleprinter(const Arg *arg) {
2385 term.mode ^= MODE_PRINT;
2386 }
2387
2388 void
2389 printscreen(const Arg *arg) {
2390 tdump();
2391 }
2392
2393 void
2394 printsel(const Arg *arg) {
2395 tdumpsel();
2396 }
2397
2398 void
2399 tdumpsel(void) {
2400 char *ptr;
2401
2402 if((ptr = getsel())) {
2403 tprinter(ptr, strlen(ptr));
2404 free(ptr);
2405 }
2406 }
2407
2408 void
2409 tdumpline(int n) {
2410 char buf[UTF_SIZ];
2411 Glyph *bp, *end;
2412
2413 bp = &term.line[n][0];
2414 end = &bp[MIN(tlinelen(n), term.col) - 1];
2415 if(bp != end || bp->u != ' ') {
2416 for( ;bp <= end; ++bp)
2417 tprinter(buf, utf8encode(bp->u, buf));
2418 }
2419 tprinter("\n", 1);
2420 }
2421
2422 void
2423 tdump(void) {
2424 int i;
2425
2426 for(i = 0; i < term.row; ++i)
2427 tdumpline(i);
2428 }
2429
2430 void
2431 tputtab(int n) {
2432 uint x = term.c.x;
2433
2434 if(n > 0) {
2435 while(x < term.col && n--)
2436 for(++x; x < term.col && !term.tabs[x]; ++x)
2437 /* nothing */ ;
2438 } else if(n < 0) {
2439 while(x > 0 && n++)
2440 for(--x; x > 0 && !term.tabs[x]; --x)
2441 /* nothing */ ;
2442 }
2443 term.c.x = LIMIT(x, 0, term.col-1);
2444 }
2445
2446 void
2447 techo(Rune u) {
2448 if(ISCONTROL(u)) { /* control code */
2449 if(u & 0x80) {
2450 u &= 0x7f;
2451 tputc('^');
2452 tputc('[');
2453 } else if(u != '\n' && u != '\r' && u != '\t') {
2454 u ^= 0x40;
2455 tputc('^');
2456 }
2457 }
2458 tputc(u);
2459 }
2460
2461 void
2462 tdeftran(char ascii) {
2463 static char cs[] = "0B";
2464 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2465 char *p;
2466
2467 if((p = strchr(cs, ascii)) == NULL) {
2468 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2469 } else {
2470 term.trantbl[term.icharset] = vcs[p - cs];
2471 }
2472 }
2473
2474 void
2475 tdectest(char c) {
2476 int x, y;
2477
2478 if(c == '8') { /* DEC screen alignment test. */
2479 for(x = 0; x < term.col; ++x) {
2480 for(y = 0; y < term.row; ++y)
2481 tsetchar('E', &term.c.attr, x, y);
2482 }
2483 }
2484 }
2485
2486 void
2487 tstrsequence(uchar c) {
2488 switch (c) {
2489 case 0x90: /* DCS -- Device Control String */
2490 c = 'P';
2491 break;
2492 case 0x9f: /* APC -- Application Program Command */
2493 c = '_';
2494 break;
2495 case 0x9e: /* PM -- Privacy Message */
2496 c = '^';
2497 break;
2498 case 0x9d: /* OSC -- Operating System Command */
2499 c = ']';
2500 break;
2501 }
2502 strreset();
2503 strescseq.type = c;
2504 term.esc |= ESC_STR;
2505 }
2506
2507 void
2508 tcontrolcode(uchar ascii) {
2509 switch(ascii) {
2510 case '\t': /* HT */
2511 tputtab(1);
2512 return;
2513 case '\b': /* BS */
2514 tmoveto(term.c.x-1, term.c.y);
2515 return;
2516 case '\r': /* CR */
2517 tmoveto(0, term.c.y);
2518 return;
2519 case '\f': /* LF */
2520 case '\v': /* VT */
2521 case '\n': /* LF */
2522 /* go to first col if the mode is set */
2523 tnewline(IS_SET(MODE_CRLF));
2524 return;
2525 case '\a': /* BEL */
2526 if(term.esc & ESC_STR_END) {
2527 /* backwards compatibility to xterm */
2528 strhandle();
2529 } else {
2530 if(!(xw.state & WIN_FOCUSED))
2531 xseturgency(1);
2532 if (bellvolume)
2533 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2534 }
2535 break;
2536 case '\033': /* ESC */
2537 csireset();
2538 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2539 term.esc |= ESC_START;
2540 return;
2541 case '\016': /* SO (LS1 -- Locking shift 1) */
2542 case '\017': /* SI (LS0 -- Locking shift 0) */
2543 term.charset = 1 - (ascii - '\016');
2544 return;
2545 case '\032': /* SUB */
2546 tsetchar('?', &term.c.attr, term.c.x, term.c.y);
2547 case '\030': /* CAN */
2548 csireset();
2549 break;
2550 case '\005': /* ENQ (IGNORED) */
2551 case '\000': /* NUL (IGNORED) */
2552 case '\021': /* XON (IGNORED) */
2553 case '\023': /* XOFF (IGNORED) */
2554 case 0177: /* DEL (IGNORED) */
2555 return;
2556 case 0x84: /* TODO: IND */
2557 break;
2558 case 0x85: /* NEL -- Next line */
2559 tnewline(1); /* always go to first col */
2560 break;
2561 case 0x88: /* HTS -- Horizontal tab stop */
2562 term.tabs[term.c.x] = 1;
2563 break;
2564 case 0x8d: /* TODO: RI */
2565 case 0x8e: /* TODO: SS2 */
2566 case 0x8f: /* TODO: SS3 */
2567 case 0x98: /* TODO: SOS */
2568 break;
2569 case 0x9a: /* DECID -- Identify Terminal */
2570 ttywrite(vtiden, sizeof(vtiden) - 1);
2571 break;
2572 case 0x9b: /* TODO: CSI */
2573 case 0x9c: /* TODO: ST */
2574 break;
2575 case 0x90: /* DCS -- Device Control String */
2576 case 0x9f: /* APC -- Application Program Command */
2577 case 0x9e: /* PM -- Privacy Message */
2578 case 0x9d: /* OSC -- Operating System Command */
2579 tstrsequence(ascii);
2580 return;
2581 }
2582 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2583 term.esc &= ~(ESC_STR_END|ESC_STR);
2584 }
2585
2586 /*
2587 * returns 1 when the sequence is finished and it hasn't to read
2588 * more characters for this sequence, otherwise 0
2589 */
2590 int
2591 eschandle(uchar ascii) {
2592 switch(ascii) {
2593 case '[':
2594 term.esc |= ESC_CSI;
2595 return 0;
2596 case '#':
2597 term.esc |= ESC_TEST;
2598 return 0;
2599 case 'P': /* DCS -- Device Control String */
2600 case '_': /* APC -- Application Program Command */
2601 case '^': /* PM -- Privacy Message */
2602 case ']': /* OSC -- Operating System Command */
2603 case 'k': /* old title set compatibility */
2604 tstrsequence(ascii);
2605 return 0;
2606 case 'n': /* LS2 -- Locking shift 2 */
2607 case 'o': /* LS3 -- Locking shift 3 */
2608 term.charset = 2 + (ascii - 'n');
2609 break;
2610 case '(': /* GZD4 -- set primary charset G0 */
2611 case ')': /* G1D4 -- set secondary charset G1 */
2612 case '*': /* G2D4 -- set tertiary charset G2 */
2613 case '+': /* G3D4 -- set quaternary charset G3 */
2614 term.icharset = ascii - '(';
2615 term.esc |= ESC_ALTCHARSET;
2616 return 0;
2617 case 'D': /* IND -- Linefeed */
2618 if(term.c.y == term.bot) {
2619 tscrollup(term.top, 1);
2620 } else {
2621 tmoveto(term.c.x, term.c.y+1);
2622 }
2623 break;
2624 case 'E': /* NEL -- Next line */
2625 tnewline(1); /* always go to first col */
2626 break;
2627 case 'H': /* HTS -- Horizontal tab stop */
2628 term.tabs[term.c.x] = 1;
2629 break;
2630 case 'M': /* RI -- Reverse index */
2631 if(term.c.y == term.top) {
2632 tscrolldown(term.top, 1);
2633 } else {
2634 tmoveto(term.c.x, term.c.y-1);
2635 }
2636 break;
2637 case 'Z': /* DECID -- Identify Terminal */
2638 ttywrite(vtiden, sizeof(vtiden) - 1);
2639 break;
2640 case 'c': /* RIS -- Reset to inital state */
2641 treset();
2642 xresettitle();
2643 xloadcols();
2644 break;
2645 case '=': /* DECPAM -- Application keypad */
2646 term.mode |= MODE_APPKEYPAD;
2647 break;
2648 case '>': /* DECPNM -- Normal keypad */
2649 term.mode &= ~MODE_APPKEYPAD;
2650 break;
2651 case '7': /* DECSC -- Save Cursor */
2652 tcursor(CURSOR_SAVE);
2653 break;
2654 case '8': /* DECRC -- Restore Cursor */
2655 tcursor(CURSOR_LOAD);
2656 break;
2657 case '\\': /* ST -- String Terminator */
2658 if(term.esc & ESC_STR_END)
2659 strhandle();
2660 break;
2661 default:
2662 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2663 (uchar) ascii, isprint(ascii)? ascii:'.');
2664 break;
2665 }
2666 return 1;
2667 }
2668
2669 void
2670 tputc(Rune u) {
2671 char c[UTF_SIZ];
2672 bool control;
2673 int width, len;
2674 Glyph *gp;
2675
2676 len = utf8encode(u, c);
2677 if((width = wcwidth(u)) == -1) {
2678 memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
2679 width = 1;
2680 }
2681
2682 if(IS_SET(MODE_PRINT))
2683 tprinter(c, len);
2684 control = ISCONTROL(u);
2685
2686 /*
2687 * STR sequence must be checked before anything else
2688 * because it uses all following characters until it
2689 * receives a ESC, a SUB, a ST or any other C1 control
2690 * character.
2691 */
2692 if(term.esc & ESC_STR) {
2693 if(u == '\a' || u == 030 || u == 032 || u == 033 ||
2694 ISCONTROLC1(u)) {
2695 term.esc &= ~(ESC_START|ESC_STR);
2696 term.esc |= ESC_STR_END;
2697 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2698 memmove(&strescseq.buf[strescseq.len], c, len);
2699 strescseq.len += len;
2700 return;
2701 } else {
2702 /*
2703 * Here is a bug in terminals. If the user never sends
2704 * some code to stop the str or esc command, then st
2705 * will stop responding. But this is better than
2706 * silently failing with unknown characters. At least
2707 * then users will report back.
2708 *
2709 * In the case users ever get fixed, here is the code:
2710 */
2711 /*
2712 * term.esc = 0;
2713 * strhandle();
2714 */
2715 return;
2716 }
2717 }
2718
2719 /*
2720 * Actions of control codes must be performed as soon they arrive
2721 * because they can be embedded inside a control sequence, and
2722 * they must not cause conflicts with sequences.
2723 */
2724 if(control) {
2725 tcontrolcode(u);
2726 /*
2727 * control codes are not shown ever
2728 */
2729 return;
2730 } else if(term.esc & ESC_START) {
2731 if(term.esc & ESC_CSI) {
2732 csiescseq.buf[csiescseq.len++] = u;
2733 if(BETWEEN(u, 0x40, 0x7E)
2734 || csiescseq.len >= \
2735 sizeof(csiescseq.buf)-1) {
2736 term.esc = 0;
2737 csiparse();
2738 csihandle();
2739 }
2740 return;
2741 } else if(term.esc & ESC_ALTCHARSET) {
2742 tdeftran(u);
2743 } else if(term.esc & ESC_TEST) {
2744 tdectest(u);
2745 } else {
2746 if (!eschandle(u))
2747 return;
2748 /* sequence already finished */
2749 }
2750 term.esc = 0;
2751 /*
2752 * All characters which form part of a sequence are not
2753 * printed
2754 */
2755 return;
2756 }
2757 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2758 selclear(NULL);
2759
2760 gp = &term.line[term.c.y][term.c.x];
2761 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2762 gp->mode |= ATTR_WRAP;
2763 tnewline(1);
2764 gp = &term.line[term.c.y][term.c.x];
2765 }
2766
2767 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2768 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2769
2770 if(term.c.x+width > term.col) {
2771 tnewline(1);
2772 gp = &term.line[term.c.y][term.c.x];
2773 }
2774
2775 tsetchar(u, &term.c.attr, term.c.x, term.c.y);
2776
2777 if(width == 2) {
2778 gp->mode |= ATTR_WIDE;
2779 if(term.c.x+1 < term.col) {
2780 gp[1].u = '\0';
2781 gp[1].mode = ATTR_WDUMMY;
2782 }
2783 }
2784 if(term.c.x+width < term.col) {
2785 tmoveto(term.c.x+width, term.c.y);
2786 } else {
2787 term.c.state |= CURSOR_WRAPNEXT;
2788 }
2789 }
2790
2791 void
2792 tresize(int col, int row) {
2793 int i;
2794 int minrow = MIN(row, term.row);
2795 int mincol = MIN(col, term.col);
2796 bool *bp;
2797 TCursor c;
2798
2799 if(col < 1 || row < 1) {
2800 fprintf(stderr,
2801 "tresize: error resizing to %dx%d\n", col, row);
2802 return;
2803 }
2804
2805 /*
2806 * slide screen to keep cursor where we expect it -
2807 * tscrollup would work here, but we can optimize to
2808 * memmove because we're freeing the earlier lines
2809 */
2810 for(i = 0; i <= term.c.y - row; i++) {
2811 free(term.line[i]);
2812 free(term.alt[i]);
2813 }
2814 /* ensure that both src and dst are not NULL */
2815 if (i > 0) {
2816 memmove(term.line, term.line + i, row * sizeof(Line));
2817 memmove(term.alt, term.alt + i, row * sizeof(Line));
2818 }
2819 for(i += row; i < term.row; i++) {
2820 free(term.line[i]);
2821 free(term.alt[i]);
2822 }
2823
2824 /* resize to new width */
2825 term.specbuf = xrealloc(term.specbuf, col * sizeof(XftGlyphFontSpec));
2826
2827 /* resize to new height */
2828 term.line = xrealloc(term.line, row * sizeof(Line));
2829 term.alt = xrealloc(term.alt, row * sizeof(Line));
2830 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2831 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2832
2833 /* resize each row to new width, zero-pad if needed */
2834 for(i = 0; i < minrow; i++) {
2835 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2836 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2837 }
2838
2839 /* allocate any new rows */
2840 for(/* i == minrow */; i < row; i++) {
2841 term.line[i] = xmalloc(col * sizeof(Glyph));
2842 term.alt[i] = xmalloc(col * sizeof(Glyph));
2843 }
2844 if(col > term.col) {
2845 bp = term.tabs + term.col;
2846
2847 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2848 while(--bp > term.tabs && !*bp)
2849 /* nothing */ ;
2850 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2851 *bp = 1;
2852 }
2853 /* update terminal size */
2854 term.col = col;
2855 term.row = row;
2856 /* reset scrolling region */
2857 tsetscroll(0, row-1);
2858 /* make use of the LIMIT in tmoveto */
2859 tmoveto(term.c.x, term.c.y);
2860 /* Clearing both screens (it makes dirty all lines) */
2861 c = term.c;
2862 for(i = 0; i < 2; i++) {
2863 if(mincol < col && 0 < minrow) {
2864 tclearregion(mincol, 0, col - 1, minrow - 1);
2865 }
2866 if(0 < col && minrow < row) {
2867 tclearregion(0, minrow, col - 1, row - 1);
2868 }
2869 tswapscreen();
2870 tcursor(CURSOR_LOAD);
2871 }
2872 term.c = c;
2873 }
2874
2875 void
2876 xresize(int col, int row) {
2877 xw.tw = MAX(1, col * xw.cw);
2878 xw.th = MAX(1, row * xw.ch);
2879
2880 XFreePixmap(xw.dpy, xw.buf);
2881 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2882 DefaultDepth(xw.dpy, xw.scr));
2883 XftDrawChange(xw.draw, xw.buf);
2884 xclear(0, 0, xw.w, xw.h);
2885 }
2886
2887 ushort
2888 sixd_to_16bit(int x) {
2889 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2890 }
2891
2892 bool
2893 xloadcolor(int i, const char *name, Color *ncolor) {
2894 XRenderColor color = { .alpha = 0xffff };
2895
2896 if(!name) {
2897 if(BETWEEN(i, 16, 255)) { /* 256 color */
2898 if(i < 6*6*6+16) { /* same colors as xterm */
2899 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2900 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2901 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2902 } else { /* greyscale */
2903 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
2904 color.green = color.blue = color.red;
2905 }
2906 return XftColorAllocValue(xw.dpy, xw.vis,
2907 xw.cmap, &color, ncolor);
2908 } else
2909 name = colorname[i];
2910 }
2911 return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
2912 }
2913
2914 void
2915 xloadcols(void) {
2916 int i;
2917 static bool loaded;
2918 Color *cp;
2919
2920 if(loaded) {
2921 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
2922 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2923 }
2924
2925 for(i = 0; i < LEN(dc.col); i++)
2926 if(!xloadcolor(i, NULL, &dc.col[i])) {
2927 if(colorname[i])
2928 die("Could not allocate color '%s'\n", colorname[i]);
2929 else
2930 die("Could not allocate color %d\n", i);
2931 }
2932 loaded = true;
2933 }
2934
2935 int
2936 xsetcolorname(int x, const char *name) {
2937 Color ncolor;
2938
2939 if(!BETWEEN(x, 0, LEN(dc.col)))
2940 return 1;
2941
2942
2943 if(!xloadcolor(x, name, &ncolor))
2944 return 1;
2945
2946 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2947 dc.col[x] = ncolor;
2948 return 0;
2949 }
2950
2951 void
2952 xtermclear(int col1, int row1, int col2, int row2) {
2953 XftDrawRect(xw.draw,
2954 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2955 borderpx + col1 * xw.cw,
2956 borderpx + row1 * xw.ch,
2957 (col2-col1+1) * xw.cw,
2958 (row2-row1+1) * xw.ch);
2959 }
2960
2961 /*
2962 * Absolute coordinates.
2963 */
2964 void
2965 xclear(int x1, int y1, int x2, int y2) {
2966 XftDrawRect(xw.draw,
2967 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2968 x1, y1, x2-x1, y2-y1);
2969 }
2970
2971 void
2972 xhints(void) {
2973 XClassHint class = {opt_class ? opt_class : termname, termname};
2974 XWMHints wm = {.flags = InputHint, .input = 1};
2975 XSizeHints *sizeh = NULL;
2976
2977 sizeh = XAllocSizeHints();
2978
2979 sizeh->flags = PSize | PResizeInc | PBaseSize;
2980 sizeh->height = xw.h;
2981 sizeh->width = xw.w;
2982 sizeh->height_inc = xw.ch;
2983 sizeh->width_inc = xw.cw;
2984 sizeh->base_height = 2 * borderpx;
2985 sizeh->base_width = 2 * borderpx;
2986 if(xw.isfixed == True) {
2987 sizeh->flags |= PMaxSize | PMinSize;
2988 sizeh->min_width = sizeh->max_width = xw.w;
2989 sizeh->min_height = sizeh->max_height = xw.h;
2990 }
2991 if(xw.gm & (XValue|YValue)) {
2992 sizeh->flags |= USPosition | PWinGravity;
2993 sizeh->x = xw.l;
2994 sizeh->y = xw.t;
2995 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2996 }
2997
2998 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2999 &class);
3000 XFree(sizeh);
3001 }
3002
3003 int
3004 xgeommasktogravity(int mask) {
3005 switch(mask & (XNegative|YNegative)) {
3006 case 0:
3007 return NorthWestGravity;
3008 case XNegative:
3009 return NorthEastGravity;
3010 case YNegative:
3011 return SouthWestGravity;
3012 }
3013 return SouthEastGravity;
3014 }
3015
3016 int
3017 xloadfont(Font *f, FcPattern *pattern) {
3018 FcPattern *match;
3019 FcResult result;
3020
3021 match = FcFontMatch(NULL, pattern, &result);
3022 if(!match)
3023 return 1;
3024
3025 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3026 FcPatternDestroy(match);
3027 return 1;
3028 }
3029
3030 f->set = NULL;
3031 f->pattern = FcPatternDuplicate(pattern);
3032
3033 f->ascent = f->match->ascent;
3034 f->descent = f->match->descent;
3035 f->lbearing = 0;
3036 f->rbearing = f->match->max_advance_width;
3037
3038 f->height = f->ascent + f->descent;
3039 f->width = f->lbearing + f->rbearing;
3040
3041 return 0;
3042 }
3043
3044 void
3045 xloadfonts(char *fontstr, double fontsize) {
3046 FcPattern *pattern;
3047 FcResult r_sz, r_psz;
3048 double fontval;
3049 float ceilf(float);
3050
3051 if(fontstr[0] == '-') {
3052 pattern = XftXlfdParse(fontstr, False, False);
3053 } else {
3054 pattern = FcNameParse((FcChar8 *)fontstr);
3055 }
3056
3057 if(!pattern)
3058 die("st: can't open font %s\n", fontstr);
3059
3060 if(fontsize > 1) {
3061 FcPatternDel(pattern, FC_PIXEL_SIZE);
3062 FcPatternDel(pattern, FC_SIZE);
3063 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3064 usedfontsize = fontsize;
3065 } else {
3066 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3067 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3068 if(r_psz == FcResultMatch) {
3069 usedfontsize = fontval;
3070 } else if(r_sz == FcResultMatch) {
3071 usedfontsize = -1;
3072 } else {
3073 /*
3074 * Default font size is 12, if none given. This is to
3075 * have a known usedfontsize value.
3076 */
3077 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3078 usedfontsize = 12;
3079 }
3080 defaultfontsize = usedfontsize;
3081 }
3082
3083 FcConfigSubstitute(0, pattern, FcMatchPattern);
3084 FcDefaultSubstitute(pattern);
3085
3086 if(xloadfont(&dc.font, pattern))
3087 die("st: can't open font %s\n", fontstr);
3088
3089 if(usedfontsize < 0) {
3090 FcPatternGetDouble(dc.font.match->pattern,
3091 FC_PIXEL_SIZE, 0, &fontval);
3092 usedfontsize = fontval;
3093 if(fontsize == 0)
3094 defaultfontsize = fontval;
3095 }
3096
3097 /* Setting character width and height. */
3098 xw.cw = ceilf(dc.font.width * cwscale);
3099 xw.ch = ceilf(dc.font.height * chscale);
3100
3101 FcPatternDel(pattern, FC_SLANT);
3102 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3103 if(xloadfont(&dc.ifont, pattern))
3104 die("st: can't open font %s\n", fontstr);
3105
3106 FcPatternDel(pattern, FC_WEIGHT);
3107 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3108 if(xloadfont(&dc.ibfont, pattern))
3109 die("st: can't open font %s\n", fontstr);
3110
3111 FcPatternDel(pattern, FC_SLANT);
3112 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3113 if(xloadfont(&dc.bfont, pattern))
3114 die("st: can't open font %s\n", fontstr);
3115
3116 FcPatternDestroy(pattern);
3117 }
3118
3119 void
3120 xunloadfont(Font *f) {
3121 XftFontClose(xw.dpy, f->match);
3122 FcPatternDestroy(f->pattern);
3123 if(f->set)
3124 FcFontSetDestroy(f->set);
3125 }
3126
3127 void
3128 xunloadfonts(void) {
3129 /* Free the loaded fonts in the font cache. */
3130 while(frclen > 0)
3131 XftFontClose(xw.dpy, frc[--frclen].font);
3132
3133 xunloadfont(&dc.font);
3134 xunloadfont(&dc.bfont);
3135 xunloadfont(&dc.ifont);
3136 xunloadfont(&dc.ibfont);
3137 }
3138
3139 void
3140 xzoom(const Arg *arg) {
3141 Arg larg;
3142
3143 larg.i = usedfontsize + arg->i;
3144 xzoomabs(&larg);
3145 }
3146
3147 void
3148 xzoomabs(const Arg *arg) {
3149 xunloadfonts();
3150 xloadfonts(usedfont, arg->i);
3151 cresize(0, 0);
3152 redraw();
3153 xhints();
3154 }
3155
3156 void
3157 xzoomreset(const Arg *arg) {
3158 Arg larg;
3159
3160 if(defaultfontsize > 0) {
3161 larg.i = defaultfontsize;
3162 xzoomabs(&larg);
3163 }
3164 }
3165
3166 void
3167 xinit(void) {
3168 XGCValues gcvalues;
3169 Cursor cursor;
3170 Window parent;
3171 pid_t thispid = getpid();
3172
3173 if(!(xw.dpy = XOpenDisplay(NULL)))
3174 die("Can't open display\n");
3175 xw.scr = XDefaultScreen(xw.dpy);
3176 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3177
3178 /* font */
3179 if(!FcInit())
3180 die("Could not init fontconfig.\n");
3181
3182 usedfont = (opt_font == NULL)? font : opt_font;
3183 xloadfonts(usedfont, 0);
3184
3185 /* colors */
3186 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3187 xloadcols();
3188
3189 /* adjust fixed window geometry */
3190 xw.w = 2 * borderpx + term.col * xw.cw;
3191 xw.h = 2 * borderpx + term.row * xw.ch;
3192 if(xw.gm & XNegative)
3193 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3194 if(xw.gm & YNegative)
3195 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3196
3197 /* Events */
3198 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3199 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3200 xw.attrs.bit_gravity = NorthWestGravity;
3201 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3202 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3203 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3204 xw.attrs.colormap = xw.cmap;
3205
3206 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3207 parent = XRootWindow(xw.dpy, xw.scr);
3208 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3209 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3210 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3211 | CWEventMask | CWColormap, &xw.attrs);
3212
3213 memset(&gcvalues, 0, sizeof(gcvalues));
3214 gcvalues.graphics_exposures = False;
3215 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3216 &gcvalues);
3217 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3218 DefaultDepth(xw.dpy, xw.scr));
3219 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3220 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3221
3222 /* Xft rendering context */
3223 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3224
3225 /* input methods */
3226 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3227 XSetLocaleModifiers("@im=local");
3228 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3229 XSetLocaleModifiers("@im=");
3230 if((xw.xim = XOpenIM(xw.dpy,
3231 NULL, NULL, NULL)) == NULL) {
3232 die("XOpenIM failed. Could not open input"
3233 " device.\n");
3234 }
3235 }
3236 }
3237 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3238 | XIMStatusNothing, XNClientWindow, xw.win,
3239 XNFocusWindow, xw.win, NULL);
3240 if(xw.xic == NULL)
3241 die("XCreateIC failed. Could not obtain input method.\n");
3242
3243 /* white cursor, black outline */
3244 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3245 XDefineCursor(xw.dpy, xw.win, cursor);
3246 XRecolorCursor(xw.dpy, cursor,
3247 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3248 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3249
3250 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3251 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3252 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3253 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3254
3255 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3256 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3257 PropModeReplace, (uchar *)&thispid, 1);
3258
3259 xresettitle();
3260 XMapWindow(xw.dpy, xw.win);
3261 xhints();
3262 XSync(xw.dpy, False);
3263 }
3264
3265 int
3266 xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
3267 {
3268 float winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch, xp, yp;
3269 ushort mode, prevmode = USHRT_MAX;
3270 Font *font = &dc.font;
3271 int frcflags = FRC_NORMAL;
3272 float runewidth = xw.cw;
3273 Rune rune;
3274 FT_UInt glyphidx;
3275 FcResult fcres;
3276 FcPattern *fcpattern, *fontpattern;
3277 FcFontSet *fcsets[] = { NULL };
3278 FcCharSet *fccharset;
3279 int i, f, numspecs = 0;
3280
3281 for(i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
3282 /* Fetch rune and mode for current glyph. */
3283 rune = glyphs[i].u;
3284 mode = glyphs[i].mode;
3285
3286 /* Skip dummy wide-character spacing. */
3287 if(mode == ATTR_WDUMMY)
3288 continue;
3289
3290 /* Determine font for glyph if different from previous glyph. */
3291 if(prevmode != mode) {
3292 prevmode = mode;
3293 font = &dc.font;
3294 frcflags = FRC_NORMAL;
3295 runewidth = xw.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
3296 if((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
3297 font = &dc.ibfont;
3298 frcflags = FRC_ITALICBOLD;
3299 } else if(mode & ATTR_ITALIC) {
3300 font = &dc.ifont;
3301 frcflags = FRC_ITALIC;
3302 } else if(mode & ATTR_BOLD) {
3303 font = &dc.bfont;
3304 frcflags = FRC_BOLD;
3305 }
3306 yp = winy + font->ascent;
3307 }
3308
3309 /* Lookup character index with default font. */
3310 glyphidx = XftCharIndex(xw.dpy, font->match, rune);
3311 if(glyphidx) {
3312 specs[numspecs].font = font->match;
3313 specs[numspecs].glyph = glyphidx;
3314 specs[numspecs].x = (short)xp;
3315 specs[numspecs].y = (short)yp;
3316 xp += runewidth;
3317 numspecs++;
3318 continue;
3319 }
3320
3321 /* Fallback on font cache, search the font cache for match. */
3322 for(f = 0; f < frclen; f++) {
3323 glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
3324 /* Everything correct. */
3325 if(glyphidx && frc[f].flags == frcflags)
3326 break;
3327 /* We got a default font for a not found glyph. */
3328 if(!glyphidx && frc[f].flags == frcflags
3329 && frc[f].unicodep == rune) {
3330 break;
3331 }
3332 }
3333
3334 /* Nothing was found. Use fontconfig to find matching font. */
3335 if(f >= frclen) {
3336 if(!font->set)
3337 font->set = FcFontSort(0, font->pattern,
3338 FcTrue, 0, &fcres);
3339 fcsets[0] = font->set;
3340
3341 /*
3342 * Nothing was found in the cache. Now use
3343 * some dozen of Fontconfig calls to get the
3344 * font for one single character.
3345 *
3346 * Xft and fontconfig are design failures.
3347 */
3348 fcpattern = FcPatternDuplicate(font->pattern);
3349 fccharset = FcCharSetCreate();
3350
3351 FcCharSetAddChar(fccharset, rune);
3352 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3353 fccharset);
3354 FcPatternAddBool(fcpattern, FC_SCALABLE,
3355 FcTrue);
3356
3357 FcConfigSubstitute(0, fcpattern,
3358 FcMatchPattern);
3359 FcDefaultSubstitute(fcpattern);
3360
3361 fontpattern = FcFontSetMatch(0, fcsets, 1,
3362 fcpattern, &fcres);
3363
3364 /*
3365 * Overwrite or create the new cache entry.
3366 */
3367 if(frclen >= LEN(frc)) {
3368 frclen = LEN(frc) - 1;
3369 XftFontClose(xw.dpy, frc[frclen].font);
3370 frc[frclen].unicodep = 0;
3371 }
3372
3373 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3374 fontpattern);
3375 frc[frclen].flags = frcflags;
3376 frc[frclen].unicodep = rune;
3377
3378 glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
3379
3380 f = frclen;
3381 frclen++;
3382
3383 FcPatternDestroy(fcpattern);
3384 FcCharSetDestroy(fccharset);
3385 }
3386
3387 specs[numspecs].font = frc[f].font;
3388 specs[numspecs].glyph = glyphidx;
3389 specs[numspecs].x = (short)xp;
3390 specs[numspecs].y = (short)(winy + frc[f].font->ascent);
3391 xp += runewidth;
3392 numspecs++;
3393 }
3394
3395 return numspecs;
3396 }
3397
3398 void
3399 xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y) {
3400 int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
3401 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3402 width = charlen * xw.cw;
3403 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3404 XRenderColor colfg, colbg;
3405 XRectangle r;
3406
3407 /* Determine foreground and background colors based on mode. */
3408 if(base.fg == defaultfg) {
3409 if(base.mode & ATTR_ITALIC)
3410 base.fg = defaultitalic;
3411 else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD))
3412 base.fg = defaultitalic;
3413 else if(base.mode & ATTR_UNDERLINE)
3414 base.fg = defaultunderline;
3415 }
3416
3417 if(IS_TRUECOL(base.fg)) {
3418 colfg.alpha = 0xffff;
3419 colfg.red = TRUERED(base.fg);
3420 colfg.green = TRUEGREEN(base.fg);
3421 colfg.blue = TRUEBLUE(base.fg);
3422 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3423 fg = &truefg;
3424 } else {
3425 fg = &dc.col[base.fg];
3426 }
3427
3428 if(IS_TRUECOL(base.bg)) {
3429 colbg.alpha = 0xffff;
3430 colbg.green = TRUEGREEN(base.bg);
3431 colbg.red = TRUERED(base.bg);
3432 colbg.blue = TRUEBLUE(base.bg);
3433 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3434 bg = &truebg;
3435 } else {
3436 bg = &dc.col[base.bg];
3437 }
3438
3439 /* Change basic system colors [0-7] to bright system colors [8-15] */
3440 if((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
3441 fg = &dc.col[base.fg + 8];
3442
3443 if(IS_SET(MODE_REVERSE)) {
3444 if(fg == &dc.col[defaultfg]) {
3445 fg = &dc.col[defaultbg];
3446 } else {
3447 colfg.red = ~fg->color.red;
3448 colfg.green = ~fg->color.green;
3449 colfg.blue = ~fg->color.blue;
3450 colfg.alpha = fg->color.alpha;
3451 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3452 &revfg);
3453 fg = &revfg;
3454 }
3455
3456 if(bg == &dc.col[defaultbg]) {
3457 bg = &dc.col[defaultfg];
3458 } else {
3459 colbg.red = ~bg->color.red;
3460 colbg.green = ~bg->color.green;
3461 colbg.blue = ~bg->color.blue;
3462 colbg.alpha = bg->color.alpha;
3463 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3464 &revbg);
3465 bg = &revbg;
3466 }
3467 }
3468
3469 if(base.mode & ATTR_REVERSE) {
3470 temp = fg;
3471 fg = bg;
3472 bg = temp;
3473 }
3474
3475 if((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
3476 colfg.red = fg->color.red / 2;
3477 colfg.green = fg->color.green / 2;
3478 colfg.blue = fg->color.blue / 2;
3479 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3480 fg = &revfg;
3481 }
3482
3483 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3484 fg = bg;
3485
3486 if(base.mode & ATTR_INVISIBLE)
3487 fg = bg;
3488
3489 /* Intelligent cleaning up of the borders. */
3490 if(x == 0) {
3491 xclear(0, (y == 0)? 0 : winy, borderpx,
3492 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3493 }
3494 if(x + charlen >= term.col) {
3495 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3496 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3497 }
3498 if(y == 0)
3499 xclear(winx, 0, winx + width, borderpx);
3500 if(y == term.row-1)
3501 xclear(winx, winy + xw.ch, winx + width, xw.h);
3502
3503 /* Clean up the region we want to draw to. */
3504 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3505
3506 /* Set the clip region because Xft is sometimes dirty. */
3507 r.x = 0;
3508 r.y = 0;
3509 r.height = xw.ch;
3510 r.width = width;
3511 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3512
3513 /* Render the glyphs. */
3514 XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
3515
3516 /* Render underline and strikethrough. */
3517 if(base.mode & ATTR_UNDERLINE) {
3518 XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
3519 width, 1);
3520 }
3521
3522 if(base.mode & ATTR_STRUCK) {
3523 XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
3524 width, 1);
3525 }
3526
3527 /* Reset clip to none. */
3528 XftDrawSetClip(xw.draw, 0);
3529 }
3530
3531 void
3532 xdrawglyph(Glyph g, int x, int y) {
3533 int numspecs;
3534 XftGlyphFontSpec spec;
3535 numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
3536 xdrawglyphfontspecs(&spec, g, numspecs, x, y);
3537 }
3538
3539 void
3540 xdrawcursor(void) {
3541 static int oldx = 0, oldy = 0;
3542 int curx;
3543 Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs};
3544
3545 LIMIT(oldx, 0, term.col-1);
3546 LIMIT(oldy, 0, term.row-1);
3547
3548 curx = term.c.x;
3549
3550 /* adjust position if in dummy */
3551 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3552 oldx--;
3553 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3554 curx--;
3555
3556 g.u = term.line[term.c.y][term.c.x].u;
3557
3558 /* remove the old cursor */
3559 xdrawglyph(term.line[oldy][oldx], oldx, oldy);
3560
3561 if(IS_SET(MODE_HIDE))
3562 return;
3563
3564 /* draw the new one */
3565 if(xw.state & WIN_FOCUSED) {
3566 switch (xw.cursor) {
3567 case 0: /* Blinking Block */
3568 case 1: /* Blinking Block (Default) */
3569 case 2: /* Steady Block */
3570 if(IS_SET(MODE_REVERSE)) {
3571 g.mode |= ATTR_REVERSE;
3572 g.fg = defaultcs;
3573 g.bg = defaultfg;
3574 }
3575
3576 g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
3577 xdrawglyph(g, term.c.x, term.c.y);
3578 break;
3579 case 3: /* Blinking Underline */
3580 case 4: /* Steady Underline */
3581 XftDrawRect(xw.draw, &dc.col[defaultcs],
3582 borderpx + curx * xw.cw,
3583 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3584 xw.cw, cursorthickness);
3585 break;
3586 case 5: /* Blinking bar */
3587 case 6: /* Steady bar */
3588 XftDrawRect(xw.draw, &dc.col[defaultcs],
3589 borderpx + curx * xw.cw,
3590 borderpx + term.c.y * xw.ch,
3591 cursorthickness, xw.ch);
3592 break;
3593 }
3594 } else {
3595 XftDrawRect(xw.draw, &dc.col[defaultcs],
3596 borderpx + curx * xw.cw,
3597 borderpx + term.c.y * xw.ch,
3598 xw.cw - 1, 1);
3599 XftDrawRect(xw.draw, &dc.col[defaultcs],
3600 borderpx + curx * xw.cw,
3601 borderpx + term.c.y * xw.ch,
3602 1, xw.ch - 1);
3603 XftDrawRect(xw.draw, &dc.col[defaultcs],
3604 borderpx + (curx + 1) * xw.cw - 1,
3605 borderpx + term.c.y * xw.ch,
3606 1, xw.ch - 1);
3607 XftDrawRect(xw.draw, &dc.col[defaultcs],
3608 borderpx + curx * xw.cw,
3609 borderpx + (term.c.y + 1) * xw.ch - 1,
3610 xw.cw, 1);
3611 }
3612 oldx = curx, oldy = term.c.y;
3613 }
3614
3615
3616 void
3617 xsettitle(char *p) {
3618 XTextProperty prop;
3619
3620 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3621 &prop);
3622 XSetWMName(xw.dpy, xw.win, &prop);
3623 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3624 XFree(prop.value);
3625 }
3626
3627 void
3628 xresettitle(void) {
3629 xsettitle(opt_title ? opt_title : "st");
3630 }
3631
3632 void
3633 redraw(void) {
3634 tfulldirt();
3635 draw();
3636 }
3637
3638 void
3639 draw(void) {
3640 drawregion(0, 0, term.col, term.row);
3641 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3642 xw.h, 0, 0);
3643 XSetForeground(xw.dpy, dc.gc,
3644 dc.col[IS_SET(MODE_REVERSE)?
3645 defaultfg : defaultbg].pixel);
3646 }
3647
3648 void
3649 drawregion(int x1, int y1, int x2, int y2) {
3650 int i, x, y, ox, numspecs;
3651 Glyph base, new;
3652 XftGlyphFontSpec* specs;
3653 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3654
3655 if(!(xw.state & WIN_VISIBLE))
3656 return;
3657
3658 for(y = y1; y < y2; y++) {
3659 if(!term.dirty[y])
3660 continue;
3661
3662 xtermclear(0, y, term.col, y);
3663 term.dirty[y] = 0;
3664
3665 specs = term.specbuf;
3666 numspecs = xmakeglyphfontspecs(specs, &term.line[y][0], x2 - x1, x1, y);
3667
3668 i = ox = 0;
3669 for(x = x1; x < x2 && i < numspecs; x++) {
3670 new = term.line[y][x];
3671 if(new.mode == ATTR_WDUMMY)
3672 continue;
3673 if(ena_sel && selected(x, y))
3674 new.mode ^= ATTR_REVERSE;
3675 if(i > 0 && ATTRCMP(base, new)) {
3676 xdrawglyphfontspecs(specs, base, i, ox, y);
3677 specs += i;
3678 numspecs -= i;
3679 i = 0;
3680 }
3681 if(i == 0) {
3682 ox = x;
3683 base = new;
3684 }
3685 i++;
3686 }
3687 if(i > 0)
3688 xdrawglyphfontspecs(specs, base, i, ox, y);
3689 }
3690 xdrawcursor();
3691 }
3692
3693 void
3694 expose(XEvent *ev) {
3695 redraw();
3696 }
3697
3698 void
3699 visibility(XEvent *ev) {
3700 XVisibilityEvent *e = &ev->xvisibility;
3701
3702 MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
3703 }
3704
3705 void
3706 unmap(XEvent *ev) {
3707 xw.state &= ~WIN_VISIBLE;
3708 }
3709
3710 void
3711 xsetpointermotion(int set) {
3712 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3713 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3714 }
3715
3716 void
3717 xseturgency(int add) {
3718 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3719
3720 MODBIT(h->flags, add, XUrgencyHint);
3721 XSetWMHints(xw.dpy, xw.win, h);
3722 XFree(h);
3723 }
3724
3725 void
3726 focus(XEvent *ev) {
3727 XFocusChangeEvent *e = &ev->xfocus;
3728
3729 if(e->mode == NotifyGrab)
3730 return;
3731
3732 if(ev->type == FocusIn) {
3733 XSetICFocus(xw.xic);
3734 xw.state |= WIN_FOCUSED;
3735 xseturgency(0);
3736 if(IS_SET(MODE_FOCUS))
3737 ttywrite("\033[I", 3);
3738 } else {
3739 XUnsetICFocus(xw.xic);
3740 xw.state &= ~WIN_FOCUSED;
3741 if(IS_SET(MODE_FOCUS))
3742 ttywrite("\033[O", 3);
3743 }
3744 }
3745
3746 bool
3747 match(uint mask, uint state) {
3748 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3749 }
3750
3751 void
3752 numlock(const Arg *dummy) {
3753 term.numlock ^= 1;
3754 }
3755
3756 char*
3757 kmap(KeySym k, uint state) {
3758 Key *kp;
3759 int i;
3760
3761 /* Check for mapped keys out of X11 function keys. */
3762 for(i = 0; i < LEN(mappedkeys); i++) {
3763 if(mappedkeys[i] == k)
3764 break;
3765 }
3766 if(i == LEN(mappedkeys)) {
3767 if((k & 0xFFFF) < 0xFD00)
3768 return NULL;
3769 }
3770
3771 for(kp = key; kp < key + LEN(key); kp++) {
3772 if(kp->k != k)
3773 continue;
3774
3775 if(!match(kp->mask, state))
3776 continue;
3777
3778 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3779 continue;
3780 if(term.numlock && kp->appkey == 2)
3781 continue;
3782
3783 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3784 continue;
3785
3786 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3787 continue;
3788
3789 return kp->s;
3790 }
3791
3792 return NULL;
3793 }
3794
3795 void
3796 kpress(XEvent *ev) {
3797 XKeyEvent *e = &ev->xkey;
3798 KeySym ksym;
3799 char buf[32], *customkey;
3800 int len;
3801 Rune c;
3802 Status status;
3803 Shortcut *bp;
3804
3805 if(IS_SET(MODE_KBDLOCK))
3806 return;
3807
3808 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3809 /* 1. shortcuts */
3810 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3811 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3812 bp->func(&(bp->arg));
3813 return;
3814 }
3815 }
3816
3817 /* 2. custom keys from config.h */
3818 if((customkey = kmap(ksym, e->state))) {
3819 ttysend(customkey, strlen(customkey));
3820 return;
3821 }
3822
3823 /* 3. composed string from input method */
3824 if(len == 0)
3825 return;
3826 if(len == 1 && e->state & Mod1Mask) {
3827 if(IS_SET(MODE_8BIT)) {
3828 if(*buf < 0177) {
3829 c = *buf | 0x80;
3830 len = utf8encode(c, buf);
3831 }
3832 } else {
3833 buf[1] = buf[0];
3834 buf[0] = '\033';
3835 len = 2;
3836 }
3837 }
3838 ttysend(buf, len);
3839 }
3840
3841
3842 void
3843 cmessage(XEvent *e) {
3844 /*
3845 * See xembed specs
3846 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3847 */
3848 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3849 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3850 xw.state |= WIN_FOCUSED;
3851 xseturgency(0);
3852 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3853 xw.state &= ~WIN_FOCUSED;
3854 }
3855 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3856 /* Send SIGHUP to shell */
3857 kill(pid, SIGHUP);
3858 exit(EXIT_SUCCESS);
3859 }
3860 }
3861
3862 void
3863 cresize(int width, int height) {
3864 int col, row;
3865
3866 if(width != 0)
3867 xw.w = width;
3868 if(height != 0)
3869 xw.h = height;
3870
3871 col = (xw.w - 2 * borderpx) / xw.cw;
3872 row = (xw.h - 2 * borderpx) / xw.ch;
3873
3874 tresize(col, row);
3875 xresize(col, row);
3876 ttyresize();
3877 }
3878
3879 void
3880 resize(XEvent *e) {
3881 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3882 return;
3883
3884 cresize(e->xconfigure.width, e->xconfigure.height);
3885 }
3886
3887 void
3888 run(void) {
3889 XEvent ev;
3890 int w = xw.w, h = xw.h;
3891 fd_set rfd;
3892 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3893 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3894 long deltatime;
3895
3896 /* Waiting for window mapping */
3897 do {
3898 XNextEvent(xw.dpy, &ev);
3899 if(ev.type == ConfigureNotify) {
3900 w = ev.xconfigure.width;
3901 h = ev.xconfigure.height;
3902 }
3903 } while(ev.type != MapNotify);
3904
3905 ttynew();
3906 cresize(w, h);
3907
3908 clock_gettime(CLOCK_MONOTONIC, &last);
3909 lastblink = last;
3910
3911 for(xev = actionfps;;) {
3912 FD_ZERO(&rfd);
3913 FD_SET(cmdfd, &rfd);
3914 FD_SET(xfd, &rfd);
3915
3916 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3917 if(errno == EINTR)
3918 continue;
3919 die("select failed: %s\n", strerror(errno));
3920 }
3921 if(FD_ISSET(cmdfd, &rfd)) {
3922 ttyread();
3923 if(blinktimeout) {
3924 blinkset = tattrset(ATTR_BLINK);
3925 if(!blinkset)
3926 MODBIT(term.mode, 0, MODE_BLINK);
3927 }
3928 }
3929
3930 if(FD_ISSET(xfd, &rfd))
3931 xev = actionfps;
3932
3933 clock_gettime(CLOCK_MONOTONIC, &now);
3934 drawtimeout.tv_sec = 0;
3935 drawtimeout.tv_nsec = (1000 * 1E6)/ xfps;
3936 tv = &drawtimeout;
3937
3938 dodraw = 0;
3939 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3940 tsetdirtattr(ATTR_BLINK);
3941 term.mode ^= MODE_BLINK;
3942 lastblink = now;
3943 dodraw = 1;
3944 }
3945 deltatime = TIMEDIFF(now, last);
3946 if(deltatime > 1000 / (xev ? xfps : actionfps)) {
3947 dodraw = 1;
3948 last = now;
3949 }
3950
3951 if(dodraw) {
3952 while(XPending(xw.dpy)) {
3953 XNextEvent(xw.dpy, &ev);
3954 if(XFilterEvent(&ev, None))
3955 continue;
3956 if(handler[ev.type])
3957 (handler[ev.type])(&ev);
3958 }
3959
3960 draw();
3961 XFlush(xw.dpy);
3962
3963 if(xev && !FD_ISSET(xfd, &rfd))
3964 xev--;
3965 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3966 if(blinkset) {
3967 if(TIMEDIFF(now, lastblink) \
3968 > blinktimeout) {
3969 drawtimeout.tv_nsec = 1000;
3970 } else {
3971 drawtimeout.tv_nsec = (1E6 * \
3972 (blinktimeout - \
3973 TIMEDIFF(now,
3974 lastblink)));
3975 }
3976 drawtimeout.tv_sec = \
3977 drawtimeout.tv_nsec / 1E9;
3978 drawtimeout.tv_nsec %= (long)1E9;
3979 } else {
3980 tv = NULL;
3981 }
3982 }
3983 }
3984 }
3985 }
3986
3987 void
3988 usage(void) {
3989 die("%s " VERSION " (c) 2010-2015 st engineers\n"
3990 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3991 " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
3992 " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3993 " [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
3994 argv0);
3995 }
3996
3997 int
3998 main(int argc, char *argv[]) {
3999 uint cols = 80, rows = 24;
4000
4001 xw.l = xw.t = 0;
4002 xw.isfixed = False;
4003 xw.cursor = 0;
4004
4005 ARGBEGIN {
4006 case 'a':
4007 allowaltscreen = false;
4008 break;
4009 case 'c':
4010 opt_class = EARGF(usage());
4011 break;
4012 case 'e':
4013 if(argc > 0)
4014 --argc, ++argv;
4015 goto run;
4016 case 'f':
4017 opt_font = EARGF(usage());
4018 break;
4019 case 'g':
4020 xw.gm = XParseGeometry(EARGF(usage()),
4021 &xw.l, &xw.t, &cols, &rows);
4022 break;
4023 case 'i':
4024 xw.isfixed = True;
4025 break;
4026 case 'o':
4027 opt_io = EARGF(usage());
4028 break;
4029 case 'l':
4030 opt_line = EARGF(usage());
4031 break;
4032 case 't':
4033 opt_title = EARGF(usage());
4034 break;
4035 case 'w':
4036 opt_embed = EARGF(usage());
4037 break;
4038 case 'v':
4039 default:
4040 usage();
4041 } ARGEND;
4042
4043 run:
4044 if(argc > 0) {
4045 /* eat all remaining arguments */
4046 opt_cmd = argv;
4047 if(!opt_title && !opt_line)
4048 opt_title = basename(xstrdup(argv[0]));
4049 }
4050 setlocale(LC_CTYPE, "");
4051 XSetLocaleModifiers("");
4052 tnew(MAX(cols, 1), MAX(rows, 1));
4053 xinit();
4054 selinit();
4055 run();
4056
4057 return 0;
4058 }
4059