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Fix empty selection highlighting bug.
[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 DRAW_BUF_SIZ 20*1024
62 #define XK_ANY_MOD UINT_MAX
63 #define XK_NO_MOD 0
64 #define XK_SWITCH_MOD (1<<13)
65
66 /* macros */
67 #define MIN(a, b) ((a) < (b) ? (a) : (b))
68 #define MAX(a, b) ((a) < (b) ? (b) : (a))
69 #define LEN(a) (sizeof(a) / sizeof(a)[0])
70 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
71 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
72 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
73 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
74 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
75 #define ISDELIM(u) (BETWEEN(u, 0, 127) && strchr(worddelimiters, u) != NULL)
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
80 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
81
82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
83 #define IS_TRUECOL(x) (1 << 24 & (x))
84 #define TRUERED(x) (((x) & 0xff0000) >> 8)
85 #define TRUEGREEN(x) (((x) & 0xff00))
86 #define TRUEBLUE(x) (((x) & 0xff) << 8)
87
88
89 enum glyph_attribute {
90 ATTR_NULL = 0,
91 ATTR_BOLD = 1 << 0,
92 ATTR_FAINT = 1 << 1,
93 ATTR_ITALIC = 1 << 2,
94 ATTR_UNDERLINE = 1 << 3,
95 ATTR_BLINK = 1 << 4,
96 ATTR_REVERSE = 1 << 5,
97 ATTR_INVISIBLE = 1 << 6,
98 ATTR_STRUCK = 1 << 7,
99 ATTR_WRAP = 1 << 8,
100 ATTR_WIDE = 1 << 9,
101 ATTR_WDUMMY = 1 << 10,
102 };
103
104 enum cursor_movement {
105 CURSOR_SAVE,
106 CURSOR_LOAD
107 };
108
109 enum cursor_state {
110 CURSOR_DEFAULT = 0,
111 CURSOR_WRAPNEXT = 1,
112 CURSOR_ORIGIN = 2
113 };
114
115 enum term_mode {
116 MODE_WRAP = 1 << 0,
117 MODE_INSERT = 1 << 1,
118 MODE_APPKEYPAD = 1 << 2,
119 MODE_ALTSCREEN = 1 << 3,
120 MODE_CRLF = 1 << 4,
121 MODE_MOUSEBTN = 1 << 5,
122 MODE_MOUSEMOTION = 1 << 6,
123 MODE_REVERSE = 1 << 7,
124 MODE_KBDLOCK = 1 << 8,
125 MODE_HIDE = 1 << 9,
126 MODE_ECHO = 1 << 10,
127 MODE_APPCURSOR = 1 << 11,
128 MODE_MOUSESGR = 1 << 12,
129 MODE_8BIT = 1 << 13,
130 MODE_BLINK = 1 << 14,
131 MODE_FBLINK = 1 << 15,
132 MODE_FOCUS = 1 << 16,
133 MODE_MOUSEX10 = 1 << 17,
134 MODE_MOUSEMANY = 1 << 18,
135 MODE_BRCKTPASTE = 1 << 19,
136 MODE_PRINT = 1 << 20,
137 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
138 |MODE_MOUSEMANY,
139 };
140
141 enum charset {
142 CS_GRAPHIC0,
143 CS_GRAPHIC1,
144 CS_UK,
145 CS_USA,
146 CS_MULTI,
147 CS_GER,
148 CS_FIN
149 };
150
151 enum escape_state {
152 ESC_START = 1,
153 ESC_CSI = 2,
154 ESC_STR = 4, /* DCS, OSC, PM, APC */
155 ESC_ALTCHARSET = 8,
156 ESC_STR_END = 16, /* a final string was encountered */
157 ESC_TEST = 32, /* Enter in test mode */
158 };
159
160 enum window_state {
161 WIN_VISIBLE = 1,
162 WIN_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 XftDraw *Draw;
187 typedef XftColor Color;
188
189 typedef struct {
190 long u; /* character code */
191 ushort mode; /* attribute flags */
192 ushort fg; /* foreground */
193 ushort bg; /* background */
194 } Glyph;
195
196 typedef Glyph *Line;
197
198 typedef struct {
199 Glyph attr; /* current char attributes */
200 int x;
201 int y;
202 char state;
203 } TCursor;
204
205 /* CSI Escape sequence structs */
206 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
207 typedef struct {
208 char buf[ESC_BUF_SIZ]; /* raw string */
209 int len; /* raw string length */
210 char priv;
211 int arg[ESC_ARG_SIZ];
212 int narg; /* nb of args */
213 char mode[2];
214 } CSIEscape;
215
216 /* STR Escape sequence structs */
217 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
218 typedef struct {
219 char type; /* ESC type ... */
220 char buf[STR_BUF_SIZ]; /* raw string */
221 int len; /* raw string length */
222 char *args[STR_ARG_SIZ];
223 int narg; /* nb of args */
224 } STREscape;
225
226 /* Internal representation of the screen */
227 typedef struct {
228 int row; /* nb row */
229 int col; /* nb col */
230 Line *line; /* screen */
231 Line *alt; /* alternate screen */
232 bool *dirty; /* dirtyness of lines */
233 TCursor c; /* cursor */
234 int top; /* top scroll limit */
235 int bot; /* bottom scroll limit */
236 int mode; /* terminal mode flags */
237 int esc; /* escape state flags */
238 char trantbl[4]; /* charset table translation */
239 int charset; /* current charset */
240 int icharset; /* selected charset for sequence */
241 bool numlock; /* lock numbers in keyboard */
242 bool *tabs;
243 } Term;
244
245 /* Purely graphic info */
246 typedef struct {
247 Display *dpy;
248 Colormap cmap;
249 Window win;
250 Drawable buf;
251 Atom xembed, wmdeletewin, netwmname, netwmpid;
252 XIM xim;
253 XIC xic;
254 Draw draw;
255 Visual *vis;
256 XSetWindowAttributes attrs;
257 int scr;
258 bool isfixed; /* is fixed geometry? */
259 int l, t; /* left and top offset */
260 int gm; /* geometry mask */
261 int tw, th; /* tty width and height */
262 int w, h; /* window width and height */
263 int ch; /* char height */
264 int cw; /* char width */
265 char state; /* focus, redraw, visible */
266 int cursor; /* cursor style */
267 } XWindow;
268
269 typedef struct {
270 uint b;
271 uint mask;
272 char *s;
273 } Mousekey;
274
275 typedef struct {
276 KeySym k;
277 uint mask;
278 char *s;
279 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
280 signed char appkey; /* application keypad */
281 signed char appcursor; /* application cursor */
282 signed char crlf; /* crlf mode */
283 } Key;
284
285 typedef struct {
286 int mode;
287 int type;
288 int snap;
289 /*
290 * Selection variables:
291 * nb – normalized coordinates of the beginning of the selection
292 * ne – normalized coordinates of the end of the selection
293 * ob – original coordinates of the beginning of the selection
294 * oe – original coordinates of the end of the selection
295 */
296 struct {
297 int x, y;
298 } nb, ne, ob, oe;
299
300 char *primary, *clipboard;
301 Atom xtarget;
302 bool alt;
303 struct timespec tclick1;
304 struct timespec tclick2;
305 } Selection;
306
307 typedef union {
308 int i;
309 uint ui;
310 float f;
311 const void *v;
312 } Arg;
313
314 typedef struct {
315 uint mod;
316 KeySym keysym;
317 void (*func)(const Arg *);
318 const Arg arg;
319 } Shortcut;
320
321 /* function definitions used in config.h */
322 static void clipcopy(const Arg *);
323 static void clippaste(const Arg *);
324 static void numlock(const Arg *);
325 static void selpaste(const Arg *);
326 static void xzoom(const Arg *);
327 static void xzoomabs(const Arg *);
328 static void xzoomreset(const Arg *);
329 static void printsel(const Arg *);
330 static void printscreen(const Arg *) ;
331 static void toggleprinter(const Arg *);
332
333 /* Config.h for applying patches and the configuration. */
334 #include "config.h"
335
336 /* Font structure */
337 typedef struct {
338 int height;
339 int width;
340 int ascent;
341 int descent;
342 short lbearing;
343 short rbearing;
344 XftFont *match;
345 FcFontSet *set;
346 FcPattern *pattern;
347 } Font;
348
349 /* Drawing Context */
350 typedef struct {
351 Color col[MAX(LEN(colorname), 256)];
352 Font font, bfont, ifont, ibfont;
353 GC gc;
354 } DC;
355
356 static void die(const char *, ...);
357 static void draw(void);
358 static void redraw(void);
359 static void drawregion(int, int, int, int);
360 static void execsh(void);
361 static void stty(void);
362 static void sigchld(int);
363 static void run(void);
364
365 static void csidump(void);
366 static void csihandle(void);
367 static void csiparse(void);
368 static void csireset(void);
369 static int eschandle(uchar);
370 static void strdump(void);
371 static void strhandle(void);
372 static void strparse(void);
373 static void strreset(void);
374
375 static int tattrset(int);
376 static void tprinter(char *, size_t);
377 static void tdumpsel(void);
378 static void tdumpline(int);
379 static void tdump(void);
380 static void tclearregion(int, int, int, int);
381 static void tcursor(int);
382 static void tdeletechar(int);
383 static void tdeleteline(int);
384 static void tinsertblank(int);
385 static void tinsertblankline(int);
386 static int tlinelen(int);
387 static void tmoveto(int, int);
388 static void tmoveato(int, int);
389 static void tnew(int, int);
390 static void tnewline(int);
391 static void tputtab(int);
392 static void tputc(long);
393 static void treset(void);
394 static void tresize(int, int);
395 static void tscrollup(int, int);
396 static void tscrolldown(int, int);
397 static void tsetattr(int *, int);
398 static void tsetchar(long, Glyph *, int, int);
399 static void tsetscroll(int, int);
400 static void tswapscreen(void);
401 static void tsetdirt(int, int);
402 static void tsetdirtattr(int);
403 static void tsetmode(bool, bool, int *, int);
404 static void tfulldirt(void);
405 static void techo(long);
406 static void tcontrolcode(uchar );
407 static void tdectest(char );
408 static int32_t tdefcolor(int *, int *, int);
409 static void tdeftran(char);
410 static inline bool match(uint, uint);
411 static void ttynew(void);
412 static void ttyread(void);
413 static void ttyresize(void);
414 static void ttysend(char *, size_t);
415 static void ttywrite(const char *, size_t);
416 static void tstrsequence(uchar);
417
418 static inline ushort sixd_to_16bit(int);
419 static void xdraws(char *, Glyph, int, int, int, int);
420 static void xdrawglyph(Glyph, int, int);
421 static void xhints(void);
422 static void xclear(int, int, int, int);
423 static void xdrawcursor(void);
424 static void xinit(void);
425 static void xloadcols(void);
426 static int xsetcolorname(int, const char *);
427 static int xgeommasktogravity(int);
428 static int xloadfont(Font *, FcPattern *);
429 static void xloadfonts(char *, double);
430 static void xsettitle(char *);
431 static void xresettitle(void);
432 static void xsetpointermotion(int);
433 static void xseturgency(int);
434 static void xsetsel(char *, Time);
435 static void xtermclear(int, int, int, int);
436 static void xunloadfont(Font *);
437 static void xunloadfonts(void);
438 static void xresize(int, int);
439
440 static void expose(XEvent *);
441 static void visibility(XEvent *);
442 static void unmap(XEvent *);
443 static char *kmap(KeySym, uint);
444 static void kpress(XEvent *);
445 static void cmessage(XEvent *);
446 static void cresize(int, int);
447 static void resize(XEvent *);
448 static void focus(XEvent *);
449 static void brelease(XEvent *);
450 static void bpress(XEvent *);
451 static void bmotion(XEvent *);
452 static void selnotify(XEvent *);
453 static void selclear(XEvent *);
454 static void selrequest(XEvent *);
455
456 static void selinit(void);
457 static void selnormalize(void);
458 static inline bool selected(int, int);
459 static char *getsel(void);
460 static void selcopy(Time);
461 static void selscroll(int, int);
462 static void selsnap(int *, int *, int);
463 static int x2col(int);
464 static int y2row(int);
465 static void getbuttoninfo(XEvent *);
466 static void mousereport(XEvent *);
467
468 static size_t utf8decode(char *, long *, size_t);
469 static long utf8decodebyte(char, size_t *);
470 static size_t utf8encode(long, char *);
471 static char utf8encodebyte(long, size_t);
472 static size_t utf8validate(long *, size_t);
473
474 static ssize_t xwrite(int, const char *, size_t);
475 static void *xmalloc(size_t);
476 static void *xrealloc(void *, size_t);
477 static char *xstrdup(char *);
478
479 static void usage(void);
480
481 static void (*handler[LASTEvent])(XEvent *) = {
482 [KeyPress] = kpress,
483 [ClientMessage] = cmessage,
484 [ConfigureNotify] = resize,
485 [VisibilityNotify] = visibility,
486 [UnmapNotify] = unmap,
487 [Expose] = expose,
488 [FocusIn] = focus,
489 [FocusOut] = focus,
490 [MotionNotify] = bmotion,
491 [ButtonPress] = bpress,
492 [ButtonRelease] = brelease,
493 /*
494 * Uncomment if you want the selection to disappear when you select something
495 * different in another window.
496 */
497 /* [SelectionClear] = selclear, */
498 [SelectionNotify] = selnotify,
499 [SelectionRequest] = selrequest,
500 };
501
502 /* Globals */
503 static DC dc;
504 static XWindow xw;
505 static Term term;
506 static CSIEscape csiescseq;
507 static STREscape strescseq;
508 static int cmdfd;
509 static pid_t pid;
510 static Selection sel;
511 static int iofd = STDOUT_FILENO;
512 static char **opt_cmd = NULL;
513 static char *opt_io = NULL;
514 static char *opt_title = NULL;
515 static char *opt_embed = NULL;
516 static char *opt_class = NULL;
517 static char *opt_font = NULL;
518 static char *opt_line = NULL;
519 static int oldbutton = 3; /* button event on startup: 3 = release */
520
521 static char *usedfont = NULL;
522 static double usedfontsize = 0;
523 static double defaultfontsize = 0;
524
525 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
526 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
527 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
528 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
529
530 /* Font Ring Cache */
531 enum {
532 FRC_NORMAL,
533 FRC_ITALIC,
534 FRC_BOLD,
535 FRC_ITALICBOLD
536 };
537
538 typedef struct {
539 XftFont *font;
540 int flags;
541 long unicodep;
542 } Fontcache;
543
544 /* Fontcache is an array now. A new font will be appended to the array. */
545 static Fontcache frc[16];
546 static int frclen = 0;
547
548 ssize_t
549 xwrite(int fd, const char *s, size_t len) {
550 size_t aux = len;
551
552 while(len > 0) {
553 ssize_t r = write(fd, s, len);
554 if(r < 0)
555 return r;
556 len -= r;
557 s += r;
558 }
559 return aux;
560 }
561
562 void *
563 xmalloc(size_t len) {
564 void *p = malloc(len);
565
566 if(!p)
567 die("Out of memory\n");
568
569 return p;
570 }
571
572 void *
573 xrealloc(void *p, size_t len) {
574 if((p = realloc(p, len)) == NULL)
575 die("Out of memory\n");
576
577 return p;
578 }
579
580 char *
581 xstrdup(char *s) {
582 if((s = strdup(s)) == NULL)
583 die("Out of memory\n");
584
585 return s;
586 }
587
588 size_t
589 utf8decode(char *c, long *u, size_t clen) {
590 size_t i, j, len, type;
591 long udecoded;
592
593 *u = UTF_INVALID;
594 if(!clen)
595 return 0;
596 udecoded = utf8decodebyte(c[0], &len);
597 if(!BETWEEN(len, 1, UTF_SIZ))
598 return 1;
599 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
600 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
601 if(type != 0)
602 return j;
603 }
604 if(j < len)
605 return 0;
606 *u = udecoded;
607 utf8validate(u, len);
608 return len;
609 }
610
611 long
612 utf8decodebyte(char c, size_t *i) {
613 for(*i = 0; *i < LEN(utfmask); ++(*i))
614 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
615 return (uchar)c & ~utfmask[*i];
616 return 0;
617 }
618
619 size_t
620 utf8encode(long u, char *c) {
621 size_t len, i;
622
623 len = utf8validate(&u, 0);
624 if(len > UTF_SIZ)
625 return 0;
626 for(i = len - 1; i != 0; --i) {
627 c[i] = utf8encodebyte(u, 0);
628 u >>= 6;
629 }
630 c[0] = utf8encodebyte(u, len);
631 return len;
632 }
633
634 char
635 utf8encodebyte(long u, size_t i) {
636 return utfbyte[i] | (u & ~utfmask[i]);
637 }
638
639 size_t
640 utf8validate(long *u, size_t i) {
641 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
642 *u = UTF_INVALID;
643 for(i = 1; *u > utfmax[i]; ++i)
644 ;
645 return i;
646 }
647
648 void
649 selinit(void) {
650 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
651 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
652 sel.mode = SEL_IDLE;
653 sel.ob.x = -1;
654 sel.primary = NULL;
655 sel.clipboard = NULL;
656 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
657 if(sel.xtarget == None)
658 sel.xtarget = XA_STRING;
659 }
660
661 int
662 x2col(int x) {
663 x -= borderpx;
664 x /= xw.cw;
665
666 return LIMIT(x, 0, term.col-1);
667 }
668
669 int
670 y2row(int y) {
671 y -= borderpx;
672 y /= xw.ch;
673
674 return LIMIT(y, 0, term.row-1);
675 }
676
677 int
678 tlinelen(int y) {
679 int i = term.col;
680
681 if(term.line[y][i - 1].mode & ATTR_WRAP)
682 return i;
683
684 while(i > 0 && term.line[y][i - 1].u == ' ')
685 --i;
686
687 return i;
688 }
689
690 void
691 selnormalize(void) {
692 int i;
693
694 if(sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
695 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
696 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
697 } else {
698 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
699 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
700 }
701 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
702 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
703
704 selsnap(&sel.nb.x, &sel.nb.y, -1);
705 selsnap(&sel.ne.x, &sel.ne.y, +1);
706
707 /* expand selection over line breaks */
708 if (sel.type == SEL_RECTANGULAR)
709 return;
710 i = tlinelen(sel.nb.y);
711 if (i < sel.nb.x)
712 sel.nb.x = i;
713 if (tlinelen(sel.ne.y) <= sel.ne.x)
714 sel.ne.x = term.col - 1;
715 }
716
717 bool
718 selected(int x, int y) {
719 if(sel.mode == SEL_EMPTY)
720 return false;
721
722 if(sel.type == SEL_RECTANGULAR)
723 return BETWEEN(y, sel.nb.y, sel.ne.y)
724 && BETWEEN(x, sel.nb.x, sel.ne.x);
725
726 return BETWEEN(y, sel.nb.y, sel.ne.y)
727 && (y != sel.nb.y || x >= sel.nb.x)
728 && (y != sel.ne.y || x <= sel.ne.x);
729 }
730
731 void
732 selsnap(int *x, int *y, int direction) {
733 int newx, newy, xt, yt;
734 bool delim, prevdelim;
735 Glyph *gp, *prevgp;
736
737 switch(sel.snap) {
738 case SNAP_WORD:
739 /*
740 * Snap around if the word wraps around at the end or
741 * beginning of a line.
742 */
743 prevgp = &term.line[*y][*x];
744 prevdelim = ISDELIM(prevgp->u);
745 for(;;) {
746 newx = *x + direction;
747 newy = *y;
748 if(!BETWEEN(newx, 0, term.col - 1)) {
749 newy += direction;
750 newx = (newx + term.col) % term.col;
751 if (!BETWEEN(newy, 0, term.row - 1))
752 break;
753
754 if(direction > 0)
755 yt = *y, xt = *x;
756 else
757 yt = newy, xt = newx;
758 if(!(term.line[yt][xt].mode & ATTR_WRAP))
759 break;
760 }
761
762 if (newx >= tlinelen(newy))
763 break;
764
765 gp = &term.line[newy][newx];
766 delim = ISDELIM(gp->u);
767 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
768 || (delim && gp->u != prevgp->u)))
769 break;
770
771 *x = newx;
772 *y = newy;
773 prevgp = gp;
774 prevdelim = delim;
775 }
776 break;
777 case SNAP_LINE:
778 /*
779 * Snap around if the the previous line or the current one
780 * has set ATTR_WRAP at its end. Then the whole next or
781 * previous line will be selected.
782 */
783 *x = (direction < 0) ? 0 : term.col - 1;
784 if(direction < 0) {
785 for(; *y > 0; *y += direction) {
786 if(!(term.line[*y-1][term.col-1].mode
787 & ATTR_WRAP)) {
788 break;
789 }
790 }
791 } else if(direction > 0) {
792 for(; *y < term.row-1; *y += direction) {
793 if(!(term.line[*y][term.col-1].mode
794 & ATTR_WRAP)) {
795 break;
796 }
797 }
798 }
799 break;
800 }
801 }
802
803 void
804 getbuttoninfo(XEvent *e) {
805 int type;
806 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
807
808 sel.alt = IS_SET(MODE_ALTSCREEN);
809
810 sel.oe.x = x2col(e->xbutton.x);
811 sel.oe.y = y2row(e->xbutton.y);
812 selnormalize();
813
814 sel.type = SEL_REGULAR;
815 for(type = 1; type < LEN(selmasks); ++type) {
816 if(match(selmasks[type], state)) {
817 sel.type = type;
818 break;
819 }
820 }
821 }
822
823 void
824 mousereport(XEvent *e) {
825 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
826 button = e->xbutton.button, state = e->xbutton.state,
827 len;
828 char buf[40];
829 static int ox, oy;
830
831 /* from urxvt */
832 if(e->xbutton.type == MotionNotify) {
833 if(x == ox && y == oy)
834 return;
835 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
836 return;
837 /* MOUSE_MOTION: no reporting if no button is pressed */
838 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
839 return;
840
841 button = oldbutton + 32;
842 ox = x;
843 oy = y;
844 } else {
845 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
846 button = 3;
847 } else {
848 button -= Button1;
849 if(button >= 3)
850 button += 64 - 3;
851 }
852 if(e->xbutton.type == ButtonPress) {
853 oldbutton = button;
854 ox = x;
855 oy = y;
856 } else if(e->xbutton.type == ButtonRelease) {
857 oldbutton = 3;
858 /* MODE_MOUSEX10: no button release reporting */
859 if(IS_SET(MODE_MOUSEX10))
860 return;
861 if (button == 64 || button == 65)
862 return;
863 }
864 }
865
866 if(!IS_SET(MODE_MOUSEX10)) {
867 button += ((state & ShiftMask ) ? 4 : 0)
868 + ((state & Mod4Mask ) ? 8 : 0)
869 + ((state & ControlMask) ? 16 : 0);
870 }
871
872 if(IS_SET(MODE_MOUSESGR)) {
873 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
874 button, x+1, y+1,
875 e->xbutton.type == ButtonRelease ? 'm' : 'M');
876 } else if(x < 223 && y < 223) {
877 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
878 32+button, 32+x+1, 32+y+1);
879 } else {
880 return;
881 }
882
883 ttywrite(buf, len);
884 }
885
886 void
887 bpress(XEvent *e) {
888 struct timespec now;
889 Mousekey *mk;
890
891 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
892 mousereport(e);
893 return;
894 }
895
896 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
897 if(e->xbutton.button == mk->b
898 && match(mk->mask, e->xbutton.state)) {
899 ttysend(mk->s, strlen(mk->s));
900 return;
901 }
902 }
903
904 if(e->xbutton.button == Button1) {
905 clock_gettime(CLOCK_MONOTONIC, &now);
906
907 /* Clear previous selection, logically and visually. */
908 selclear(NULL);
909 sel.mode = SEL_EMPTY;
910 sel.type = SEL_REGULAR;
911 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
912 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
913
914 /*
915 * If the user clicks below predefined timeouts specific
916 * snapping behaviour is exposed.
917 */
918 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
919 sel.snap = SNAP_LINE;
920 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
921 sel.snap = SNAP_WORD;
922 } else {
923 sel.snap = 0;
924 }
925 selnormalize();
926
927 if(sel.snap != 0)
928 sel.mode = SEL_READY;
929 tsetdirt(sel.nb.y, sel.ne.y);
930 sel.tclick2 = sel.tclick1;
931 sel.tclick1 = now;
932 }
933 }
934
935 char *
936 getsel(void) {
937 char *str, *ptr;
938 int y, bufsize, lastx, linelen;
939 Glyph *gp, *last;
940
941 if(sel.ob.x == -1)
942 return NULL;
943
944 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
945 ptr = str = xmalloc(bufsize);
946
947 /* append every set & selected glyph to the selection */
948 for(y = sel.nb.y; y <= sel.ne.y; y++) {
949 linelen = tlinelen(y);
950
951 if(sel.type == SEL_RECTANGULAR) {
952 gp = &term.line[y][sel.nb.x];
953 lastx = sel.ne.x;
954 } else {
955 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
956 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
957 }
958 last = &term.line[y][MIN(lastx, linelen-1)];
959 while(last >= gp && last->u == ' ')
960 --last;
961
962 for( ; gp <= last; ++gp) {
963 if(gp->mode & ATTR_WDUMMY)
964 continue;
965
966 ptr += utf8encode(gp->u, ptr);
967 }
968
969 /*
970 * Copy and pasting of line endings is inconsistent
971 * in the inconsistent terminal and GUI world.
972 * The best solution seems like to produce '\n' when
973 * something is copied from st and convert '\n' to
974 * '\r', when something to be pasted is received by
975 * st.
976 * FIXME: Fix the computer world.
977 */
978 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
979 *ptr++ = '\n';
980 }
981 *ptr = 0;
982 return str;
983 }
984
985 void
986 selcopy(Time t) {
987 xsetsel(getsel(), t);
988 }
989
990 void
991 selnotify(XEvent *e) {
992 ulong nitems, ofs, rem;
993 int format;
994 uchar *data, *last, *repl;
995 Atom type;
996 XSelectionEvent *xsev;
997
998 ofs = 0;
999 xsev = &e->xselection;
1000 if (xsev->property == None)
1001 return;
1002 do {
1003 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1004 BUFSIZ/4, False, AnyPropertyType,
1005 &type, &format, &nitems, &rem,
1006 &data)) {
1007 fprintf(stderr, "Clipboard allocation failed\n");
1008 return;
1009 }
1010
1011 /*
1012 * As seen in getsel:
1013 * Line endings are inconsistent in the terminal and GUI world
1014 * copy and pasting. When receiving some selection data,
1015 * replace all '\n' with '\r'.
1016 * FIXME: Fix the computer world.
1017 */
1018 repl = data;
1019 last = data + nitems * format / 8;
1020 while((repl = memchr(repl, '\n', last - repl))) {
1021 *repl++ = '\r';
1022 }
1023
1024 if(IS_SET(MODE_BRCKTPASTE))
1025 ttywrite("\033[200~", 6);
1026 ttysend((char *)data, nitems * format / 8);
1027 if(IS_SET(MODE_BRCKTPASTE))
1028 ttywrite("\033[201~", 6);
1029 XFree(data);
1030 /* number of 32-bit chunks returned */
1031 ofs += nitems * format / 32;
1032 } while(rem > 0);
1033 }
1034
1035 void
1036 selpaste(const Arg *dummy) {
1037 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1038 xw.win, CurrentTime);
1039 }
1040
1041 void
1042 clipcopy(const Arg *dummy) {
1043 Atom clipboard;
1044
1045 if(sel.clipboard != NULL)
1046 free(sel.clipboard);
1047
1048 if(sel.primary != NULL) {
1049 sel.clipboard = xstrdup(sel.primary);
1050 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1051 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1052 }
1053 }
1054
1055 void
1056 clippaste(const Arg *dummy) {
1057 Atom clipboard;
1058
1059 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1060 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1061 xw.win, CurrentTime);
1062 }
1063
1064 void
1065 selclear(XEvent *e) {
1066 if(sel.ob.x == -1)
1067 return;
1068 sel.ob.x = -1;
1069 tsetdirt(sel.nb.y, sel.ne.y);
1070 }
1071
1072 void
1073 selrequest(XEvent *e) {
1074 XSelectionRequestEvent *xsre;
1075 XSelectionEvent xev;
1076 Atom xa_targets, string, clipboard;
1077 char *seltext;
1078
1079 xsre = (XSelectionRequestEvent *) e;
1080 xev.type = SelectionNotify;
1081 xev.requestor = xsre->requestor;
1082 xev.selection = xsre->selection;
1083 xev.target = xsre->target;
1084 xev.time = xsre->time;
1085 if (xsre->property == None)
1086 xsre->property = xsre->target;
1087
1088 /* reject */
1089 xev.property = None;
1090
1091 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1092 if(xsre->target == xa_targets) {
1093 /* respond with the supported type */
1094 string = sel.xtarget;
1095 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1096 XA_ATOM, 32, PropModeReplace,
1097 (uchar *) &string, 1);
1098 xev.property = xsre->property;
1099 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1100 /*
1101 * xith XA_STRING non ascii characters may be incorrect in the
1102 * requestor. It is not our problem, use utf8.
1103 */
1104 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1105 if(xsre->selection == XA_PRIMARY) {
1106 seltext = sel.primary;
1107 } else if(xsre->selection == clipboard) {
1108 seltext = sel.clipboard;
1109 } else {
1110 fprintf(stderr,
1111 "Unhandled clipboard selection 0x%lx\n",
1112 xsre->selection);
1113 return;
1114 }
1115 if(seltext != NULL) {
1116 XChangeProperty(xsre->display, xsre->requestor,
1117 xsre->property, xsre->target,
1118 8, PropModeReplace,
1119 (uchar *)seltext, strlen(seltext));
1120 xev.property = xsre->property;
1121 }
1122 }
1123
1124 /* all done, send a notification to the listener */
1125 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1126 fprintf(stderr, "Error sending SelectionNotify event\n");
1127 }
1128
1129 void
1130 xsetsel(char *str, Time t) {
1131 free(sel.primary);
1132 sel.primary = str;
1133
1134 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
1135 if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
1136 selclear(0);
1137 }
1138
1139 void
1140 brelease(XEvent *e) {
1141 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1142 mousereport(e);
1143 return;
1144 }
1145
1146 if(e->xbutton.button == Button2) {
1147 selpaste(NULL);
1148 } else if(e->xbutton.button == Button1) {
1149 if(sel.mode == SEL_READY) {
1150 getbuttoninfo(e);
1151 selcopy(e->xbutton.time);
1152 } else
1153 selclear(NULL);
1154 sel.mode = SEL_IDLE;
1155 tsetdirt(sel.nb.y, sel.ne.y);
1156 }
1157 }
1158
1159 void
1160 bmotion(XEvent *e) {
1161 int oldey, oldex, oldsby, oldsey;
1162
1163 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1164 mousereport(e);
1165 return;
1166 }
1167
1168 if(!sel.mode)
1169 return;
1170
1171 sel.mode = SEL_READY;
1172 oldey = sel.oe.y;
1173 oldex = sel.oe.x;
1174 oldsby = sel.nb.y;
1175 oldsey = sel.ne.y;
1176 getbuttoninfo(e);
1177
1178 if(oldey != sel.oe.y || oldex != sel.oe.x)
1179 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1180 }
1181
1182 void
1183 die(const char *errstr, ...) {
1184 va_list ap;
1185
1186 va_start(ap, errstr);
1187 vfprintf(stderr, errstr, ap);
1188 va_end(ap);
1189 exit(EXIT_FAILURE);
1190 }
1191
1192 void
1193 execsh(void) {
1194 char **args, *sh, *prog;
1195 const struct passwd *pw;
1196 char buf[sizeof(long) * 8 + 1];
1197
1198 errno = 0;
1199 if((pw = getpwuid(getuid())) == NULL) {
1200 if(errno)
1201 die("getpwuid:%s\n", strerror(errno));
1202 else
1203 die("who are you?\n");
1204 }
1205
1206 if (!(sh = getenv("SHELL"))) {
1207 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1208 }
1209
1210 if(opt_cmd)
1211 prog = opt_cmd[0];
1212 else if(utmp)
1213 prog = utmp;
1214 else
1215 prog = sh;
1216 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1217
1218 snprintf(buf, sizeof(buf), "%lu", xw.win);
1219
1220 unsetenv("COLUMNS");
1221 unsetenv("LINES");
1222 unsetenv("TERMCAP");
1223 setenv("LOGNAME", pw->pw_name, 1);
1224 setenv("USER", pw->pw_name, 1);
1225 setenv("SHELL", sh, 1);
1226 setenv("HOME", pw->pw_dir, 1);
1227 setenv("TERM", termname, 1);
1228 setenv("WINDOWID", buf, 1);
1229
1230 signal(SIGCHLD, SIG_DFL);
1231 signal(SIGHUP, SIG_DFL);
1232 signal(SIGINT, SIG_DFL);
1233 signal(SIGQUIT, SIG_DFL);
1234 signal(SIGTERM, SIG_DFL);
1235 signal(SIGALRM, SIG_DFL);
1236
1237 execvp(prog, args);
1238 _exit(EXIT_FAILURE);
1239 }
1240
1241 void
1242 sigchld(int a) {
1243 int stat, ret;
1244 pid_t p;
1245
1246 if((p = waitpid(pid, &stat, WNOHANG)) < 0)
1247 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1248
1249 if(pid != p)
1250 return;
1251
1252 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1253 if (ret != EXIT_SUCCESS)
1254 die("child finished with error '%d'\n", stat);
1255 exit(EXIT_SUCCESS);
1256 }
1257
1258
1259 void
1260 stty(void)
1261 {
1262 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
1263 size_t n, siz;
1264
1265 if((n = strlen(stty_args)) > sizeof(cmd)-1)
1266 die("incorrect stty parameters\n");
1267 memcpy(cmd, stty_args, n);
1268 q = cmd + n;
1269 siz = sizeof(cmd) - n;
1270 for(p = opt_cmd; p && (s = *p); ++p) {
1271 if((n = strlen(s)) > siz-1)
1272 die("stty parameter length too long\n");
1273 *q++ = ' ';
1274 q = memcpy(q, s, n);
1275 q += n;
1276 siz-= n + 1;
1277 }
1278 *q = '\0';
1279 if (system(cmd) != 0)
1280 perror("Couldn't call stty");
1281 }
1282
1283 void
1284 ttynew(void) {
1285 int m, s;
1286 struct winsize w = {term.row, term.col, 0, 0};
1287
1288 if(opt_io) {
1289 term.mode |= MODE_PRINT;
1290 iofd = (!strcmp(opt_io, "-")) ?
1291 STDOUT_FILENO :
1292 open(opt_io, O_WRONLY | O_CREAT, 0666);
1293 if(iofd < 0) {
1294 fprintf(stderr, "Error opening %s:%s\n",
1295 opt_io, strerror(errno));
1296 }
1297 }
1298
1299 if (opt_line) {
1300 if((cmdfd = open(opt_line, O_RDWR)) < 0)
1301 die("open line failed: %s\n", strerror(errno));
1302 close(STDIN_FILENO);
1303 dup(cmdfd);
1304 stty();
1305 return;
1306 }
1307
1308 /* seems to work fine on linux, openbsd and freebsd */
1309 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1310 die("openpty failed: %s\n", strerror(errno));
1311
1312 switch(pid = fork()) {
1313 case -1:
1314 die("fork failed\n");
1315 break;
1316 case 0:
1317 close(iofd);
1318 setsid(); /* create a new process group */
1319 dup2(s, STDIN_FILENO);
1320 dup2(s, STDOUT_FILENO);
1321 dup2(s, STDERR_FILENO);
1322 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1323 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1324 close(s);
1325 close(m);
1326 execsh();
1327 break;
1328 default:
1329 close(s);
1330 cmdfd = m;
1331 signal(SIGCHLD, sigchld);
1332 break;
1333 }
1334 }
1335
1336 void
1337 ttyread(void) {
1338 static char buf[BUFSIZ];
1339 static int buflen = 0;
1340 char *ptr;
1341 int charsize; /* size of utf8 char in bytes */
1342 long unicodep;
1343 int ret;
1344
1345 /* append read bytes to unprocessed bytes */
1346 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1347 die("Couldn't read from shell: %s\n", strerror(errno));
1348
1349 /* process every complete utf8 char */
1350 buflen += ret;
1351 ptr = buf;
1352 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1353 tputc(unicodep);
1354 ptr += charsize;
1355 buflen -= charsize;
1356 }
1357
1358 /* keep any uncomplete utf8 char for the next call */
1359 memmove(buf, ptr, buflen);
1360 }
1361
1362 void
1363 ttywrite(const char *s, size_t n) {
1364 if(xwrite(cmdfd, s, n) == -1)
1365 die("write error on tty: %s\n", strerror(errno));
1366 }
1367
1368 void
1369 ttysend(char *s, size_t n) {
1370 int len;
1371 long u;
1372
1373 ttywrite(s, n);
1374 if(IS_SET(MODE_ECHO))
1375 while((len = utf8decode(s, &u, n)) > 0) {
1376 techo(u);
1377 n -= len;
1378 s += len;
1379 }
1380 }
1381
1382 void
1383 ttyresize(void) {
1384 struct winsize w;
1385
1386 w.ws_row = term.row;
1387 w.ws_col = term.col;
1388 w.ws_xpixel = xw.tw;
1389 w.ws_ypixel = xw.th;
1390 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1391 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1392 }
1393
1394 int
1395 tattrset(int attr) {
1396 int i, j;
1397
1398 for(i = 0; i < term.row-1; i++) {
1399 for(j = 0; j < term.col-1; j++) {
1400 if(term.line[i][j].mode & attr)
1401 return 1;
1402 }
1403 }
1404
1405 return 0;
1406 }
1407
1408 void
1409 tsetdirt(int top, int bot) {
1410 int i;
1411
1412 LIMIT(top, 0, term.row-1);
1413 LIMIT(bot, 0, term.row-1);
1414
1415 for(i = top; i <= bot; i++)
1416 term.dirty[i] = 1;
1417 }
1418
1419 void
1420 tsetdirtattr(int attr) {
1421 int i, j;
1422
1423 for(i = 0; i < term.row-1; i++) {
1424 for(j = 0; j < term.col-1; j++) {
1425 if(term.line[i][j].mode & attr) {
1426 tsetdirt(i, i);
1427 break;
1428 }
1429 }
1430 }
1431 }
1432
1433 void
1434 tfulldirt(void) {
1435 tsetdirt(0, term.row-1);
1436 }
1437
1438 void
1439 tcursor(int mode) {
1440 static TCursor c[2];
1441 bool alt = IS_SET(MODE_ALTSCREEN);
1442
1443 if(mode == CURSOR_SAVE) {
1444 c[alt] = term.c;
1445 } else if(mode == CURSOR_LOAD) {
1446 term.c = c[alt];
1447 tmoveto(c[alt].x, c[alt].y);
1448 }
1449 }
1450
1451 void
1452 treset(void) {
1453 uint i;
1454
1455 term.c = (TCursor){{
1456 .mode = ATTR_NULL,
1457 .fg = defaultfg,
1458 .bg = defaultbg
1459 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1460
1461 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1462 for(i = tabspaces; i < term.col; i += tabspaces)
1463 term.tabs[i] = 1;
1464 term.top = 0;
1465 term.bot = term.row - 1;
1466 term.mode = MODE_WRAP;
1467 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1468 term.charset = 0;
1469
1470 for(i = 0; i < 2; i++) {
1471 tmoveto(0, 0);
1472 tcursor(CURSOR_SAVE);
1473 tclearregion(0, 0, term.col-1, term.row-1);
1474 tswapscreen();
1475 }
1476 }
1477
1478 void
1479 tnew(int col, int row) {
1480 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1481 tresize(col, row);
1482 term.numlock = 1;
1483
1484 treset();
1485 }
1486
1487 void
1488 tswapscreen(void) {
1489 Line *tmp = term.line;
1490
1491 term.line = term.alt;
1492 term.alt = tmp;
1493 term.mode ^= MODE_ALTSCREEN;
1494 tfulldirt();
1495 }
1496
1497 void
1498 tscrolldown(int orig, int n) {
1499 int i;
1500 Line temp;
1501
1502 LIMIT(n, 0, term.bot-orig+1);
1503
1504 tsetdirt(orig, term.bot-n);
1505 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1506
1507 for(i = term.bot; i >= orig+n; i--) {
1508 temp = term.line[i];
1509 term.line[i] = term.line[i-n];
1510 term.line[i-n] = temp;
1511 }
1512
1513 selscroll(orig, n);
1514 }
1515
1516 void
1517 tscrollup(int orig, int n) {
1518 int i;
1519 Line temp;
1520
1521 LIMIT(n, 0, term.bot-orig+1);
1522
1523 tclearregion(0, orig, term.col-1, orig+n-1);
1524 tsetdirt(orig+n, term.bot);
1525
1526 for(i = orig; i <= term.bot-n; i++) {
1527 temp = term.line[i];
1528 term.line[i] = term.line[i+n];
1529 term.line[i+n] = temp;
1530 }
1531
1532 selscroll(orig, -n);
1533 }
1534
1535 void
1536 selscroll(int orig, int n) {
1537 if(sel.ob.x == -1)
1538 return;
1539
1540 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1541 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1542 selclear(NULL);
1543 return;
1544 }
1545 if(sel.type == SEL_RECTANGULAR) {
1546 if(sel.ob.y < term.top)
1547 sel.ob.y = term.top;
1548 if(sel.oe.y > term.bot)
1549 sel.oe.y = term.bot;
1550 } else {
1551 if(sel.ob.y < term.top) {
1552 sel.ob.y = term.top;
1553 sel.ob.x = 0;
1554 }
1555 if(sel.oe.y > term.bot) {
1556 sel.oe.y = term.bot;
1557 sel.oe.x = term.col;
1558 }
1559 }
1560 selnormalize();
1561 }
1562 }
1563
1564 void
1565 tnewline(int first_col) {
1566 int y = term.c.y;
1567
1568 if(y == term.bot) {
1569 tscrollup(term.top, 1);
1570 } else {
1571 y++;
1572 }
1573 tmoveto(first_col ? 0 : term.c.x, y);
1574 }
1575
1576 void
1577 csiparse(void) {
1578 char *p = csiescseq.buf, *np;
1579 long int v;
1580
1581 csiescseq.narg = 0;
1582 if(*p == '?') {
1583 csiescseq.priv = 1;
1584 p++;
1585 }
1586
1587 csiescseq.buf[csiescseq.len] = '\0';
1588 while(p < csiescseq.buf+csiescseq.len) {
1589 np = NULL;
1590 v = strtol(p, &np, 10);
1591 if(np == p)
1592 v = 0;
1593 if(v == LONG_MAX || v == LONG_MIN)
1594 v = -1;
1595 csiescseq.arg[csiescseq.narg++] = v;
1596 p = np;
1597 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1598 break;
1599 p++;
1600 }
1601 csiescseq.mode[0] = *p++;
1602 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1603 }
1604
1605 /* for absolute user moves, when decom is set */
1606 void
1607 tmoveato(int x, int y) {
1608 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1609 }
1610
1611 void
1612 tmoveto(int x, int y) {
1613 int miny, maxy;
1614
1615 if(term.c.state & CURSOR_ORIGIN) {
1616 miny = term.top;
1617 maxy = term.bot;
1618 } else {
1619 miny = 0;
1620 maxy = term.row - 1;
1621 }
1622 term.c.state &= ~CURSOR_WRAPNEXT;
1623 term.c.x = LIMIT(x, 0, term.col-1);
1624 term.c.y = LIMIT(y, miny, maxy);
1625 }
1626
1627 void
1628 tsetchar(long u, Glyph *attr, int x, int y) {
1629 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1630 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1631 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1632 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1633 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1634 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1635 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1636 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1637 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1638 };
1639
1640 /*
1641 * The table is proudly stolen from rxvt.
1642 */
1643 if(term.trantbl[term.charset] == CS_GRAPHIC0 &&
1644 BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
1645 utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
1646
1647 if(term.line[y][x].mode & ATTR_WIDE) {
1648 if(x+1 < term.col) {
1649 term.line[y][x+1].u = ' ';
1650 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1651 }
1652 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1653 term.line[y][x-1].u = ' ';
1654 term.line[y][x-1].mode &= ~ATTR_WIDE;
1655 }
1656
1657 term.dirty[y] = 1;
1658 term.line[y][x] = *attr;
1659 term.line[y][x].u = u;
1660 }
1661
1662 void
1663 tclearregion(int x1, int y1, int x2, int y2) {
1664 int x, y, temp;
1665 Glyph *gp;
1666
1667 if(x1 > x2)
1668 temp = x1, x1 = x2, x2 = temp;
1669 if(y1 > y2)
1670 temp = y1, y1 = y2, y2 = temp;
1671
1672 LIMIT(x1, 0, term.col-1);
1673 LIMIT(x2, 0, term.col-1);
1674 LIMIT(y1, 0, term.row-1);
1675 LIMIT(y2, 0, term.row-1);
1676
1677 for(y = y1; y <= y2; y++) {
1678 term.dirty[y] = 1;
1679 for(x = x1; x <= x2; x++) {
1680 gp = &term.line[y][x];
1681 if(selected(x, y))
1682 selclear(NULL);
1683 gp->fg = term.c.attr.fg;
1684 gp->bg = term.c.attr.bg;
1685 gp->mode = 0;
1686 gp->u = ' ';
1687 }
1688 }
1689 }
1690
1691 void
1692 tdeletechar(int n) {
1693 int dst, src, size;
1694 Glyph *line;
1695
1696 LIMIT(n, 0, term.col - term.c.x);
1697
1698 dst = term.c.x;
1699 src = term.c.x + n;
1700 size = term.col - src;
1701 line = term.line[term.c.y];
1702
1703 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1704 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1705 }
1706
1707 void
1708 tinsertblank(int n) {
1709 int dst, src, size;
1710 Glyph *line;
1711
1712 LIMIT(n, 0, term.col - term.c.x);
1713
1714 dst = term.c.x + n;
1715 src = term.c.x;
1716 size = term.col - dst;
1717 line = term.line[term.c.y];
1718
1719 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1720 tclearregion(src, term.c.y, dst - 1, term.c.y);
1721 }
1722
1723 void
1724 tinsertblankline(int n) {
1725 if(BETWEEN(term.c.y, term.top, term.bot))
1726 tscrolldown(term.c.y, n);
1727 }
1728
1729 void
1730 tdeleteline(int n) {
1731 if(BETWEEN(term.c.y, term.top, term.bot))
1732 tscrollup(term.c.y, n);
1733 }
1734
1735 int32_t
1736 tdefcolor(int *attr, int *npar, int l) {
1737 int32_t idx = -1;
1738 uint r, g, b;
1739
1740 switch (attr[*npar + 1]) {
1741 case 2: /* direct color in RGB space */
1742 if (*npar + 4 >= l) {
1743 fprintf(stderr,
1744 "erresc(38): Incorrect number of parameters (%d)\n",
1745 *npar);
1746 break;
1747 }
1748 r = attr[*npar + 2];
1749 g = attr[*npar + 3];
1750 b = attr[*npar + 4];
1751 *npar += 4;
1752 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1753 fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
1754 r, g, b);
1755 else
1756 idx = TRUECOLOR(r, g, b);
1757 break;
1758 case 5: /* indexed color */
1759 if (*npar + 2 >= l) {
1760 fprintf(stderr,
1761 "erresc(38): Incorrect number of parameters (%d)\n",
1762 *npar);
1763 break;
1764 }
1765 *npar += 2;
1766 if(!BETWEEN(attr[*npar], 0, 255))
1767 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1768 else
1769 idx = attr[*npar];
1770 break;
1771 case 0: /* implemented defined (only foreground) */
1772 case 1: /* transparent */
1773 case 3: /* direct color in CMY space */
1774 case 4: /* direct color in CMYK space */
1775 default:
1776 fprintf(stderr,
1777 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1778 break;
1779 }
1780
1781 return idx;
1782 }
1783
1784 void
1785 tsetattr(int *attr, int l) {
1786 int i;
1787 int32_t idx;
1788
1789 for(i = 0; i < l; i++) {
1790 switch(attr[i]) {
1791 case 0:
1792 term.c.attr.mode &= ~(
1793 ATTR_BOLD |
1794 ATTR_FAINT |
1795 ATTR_ITALIC |
1796 ATTR_UNDERLINE |
1797 ATTR_BLINK |
1798 ATTR_REVERSE |
1799 ATTR_INVISIBLE |
1800 ATTR_STRUCK );
1801 term.c.attr.fg = defaultfg;
1802 term.c.attr.bg = defaultbg;
1803 break;
1804 case 1:
1805 term.c.attr.mode |= ATTR_BOLD;
1806 break;
1807 case 2:
1808 term.c.attr.mode |= ATTR_FAINT;
1809 break;
1810 case 3:
1811 term.c.attr.mode |= ATTR_ITALIC;
1812 break;
1813 case 4:
1814 term.c.attr.mode |= ATTR_UNDERLINE;
1815 break;
1816 case 5: /* slow blink */
1817 /* FALLTHROUGH */
1818 case 6: /* rapid blink */
1819 term.c.attr.mode |= ATTR_BLINK;
1820 break;
1821 case 7:
1822 term.c.attr.mode |= ATTR_REVERSE;
1823 break;
1824 case 8:
1825 term.c.attr.mode |= ATTR_INVISIBLE;
1826 break;
1827 case 9:
1828 term.c.attr.mode |= ATTR_STRUCK;
1829 break;
1830 case 22:
1831 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1832 break;
1833 case 23:
1834 term.c.attr.mode &= ~ATTR_ITALIC;
1835 break;
1836 case 24:
1837 term.c.attr.mode &= ~ATTR_UNDERLINE;
1838 break;
1839 case 25:
1840 term.c.attr.mode &= ~ATTR_BLINK;
1841 break;
1842 case 27:
1843 term.c.attr.mode &= ~ATTR_REVERSE;
1844 break;
1845 case 28:
1846 term.c.attr.mode &= ~ATTR_INVISIBLE;
1847 break;
1848 case 29:
1849 term.c.attr.mode &= ~ATTR_STRUCK;
1850 break;
1851 case 38:
1852 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1853 term.c.attr.fg = idx;
1854 break;
1855 case 39:
1856 term.c.attr.fg = defaultfg;
1857 break;
1858 case 48:
1859 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1860 term.c.attr.bg = idx;
1861 break;
1862 case 49:
1863 term.c.attr.bg = defaultbg;
1864 break;
1865 default:
1866 if(BETWEEN(attr[i], 30, 37)) {
1867 term.c.attr.fg = attr[i] - 30;
1868 } else if(BETWEEN(attr[i], 40, 47)) {
1869 term.c.attr.bg = attr[i] - 40;
1870 } else if(BETWEEN(attr[i], 90, 97)) {
1871 term.c.attr.fg = attr[i] - 90 + 8;
1872 } else if(BETWEEN(attr[i], 100, 107)) {
1873 term.c.attr.bg = attr[i] - 100 + 8;
1874 } else {
1875 fprintf(stderr,
1876 "erresc(default): gfx attr %d unknown\n",
1877 attr[i]), csidump();
1878 }
1879 break;
1880 }
1881 }
1882 }
1883
1884 void
1885 tsetscroll(int t, int b) {
1886 int temp;
1887
1888 LIMIT(t, 0, term.row-1);
1889 LIMIT(b, 0, term.row-1);
1890 if(t > b) {
1891 temp = t;
1892 t = b;
1893 b = temp;
1894 }
1895 term.top = t;
1896 term.bot = b;
1897 }
1898
1899 void
1900 tsetmode(bool priv, bool set, int *args, int narg) {
1901 int *lim, mode;
1902 bool alt;
1903
1904 for(lim = args + narg; args < lim; ++args) {
1905 if(priv) {
1906 switch(*args) {
1907 case 1: /* DECCKM -- Cursor key */
1908 MODBIT(term.mode, set, MODE_APPCURSOR);
1909 break;
1910 case 5: /* DECSCNM -- Reverse video */
1911 mode = term.mode;
1912 MODBIT(term.mode, set, MODE_REVERSE);
1913 if(mode != term.mode)
1914 redraw();
1915 break;
1916 case 6: /* DECOM -- Origin */
1917 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1918 tmoveato(0, 0);
1919 break;
1920 case 7: /* DECAWM -- Auto wrap */
1921 MODBIT(term.mode, set, MODE_WRAP);
1922 break;
1923 case 0: /* Error (IGNORED) */
1924 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1925 case 3: /* DECCOLM -- Column (IGNORED) */
1926 case 4: /* DECSCLM -- Scroll (IGNORED) */
1927 case 8: /* DECARM -- Auto repeat (IGNORED) */
1928 case 18: /* DECPFF -- Printer feed (IGNORED) */
1929 case 19: /* DECPEX -- Printer extent (IGNORED) */
1930 case 42: /* DECNRCM -- National characters (IGNORED) */
1931 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1932 break;
1933 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1934 MODBIT(term.mode, !set, MODE_HIDE);
1935 break;
1936 case 9: /* X10 mouse compatibility mode */
1937 xsetpointermotion(0);
1938 MODBIT(term.mode, 0, MODE_MOUSE);
1939 MODBIT(term.mode, set, MODE_MOUSEX10);
1940 break;
1941 case 1000: /* 1000: report button press */
1942 xsetpointermotion(0);
1943 MODBIT(term.mode, 0, MODE_MOUSE);
1944 MODBIT(term.mode, set, MODE_MOUSEBTN);
1945 break;
1946 case 1002: /* 1002: report motion on button press */
1947 xsetpointermotion(0);
1948 MODBIT(term.mode, 0, MODE_MOUSE);
1949 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1950 break;
1951 case 1003: /* 1003: enable all mouse motions */
1952 xsetpointermotion(set);
1953 MODBIT(term.mode, 0, MODE_MOUSE);
1954 MODBIT(term.mode, set, MODE_MOUSEMANY);
1955 break;
1956 case 1004: /* 1004: send focus events to tty */
1957 MODBIT(term.mode, set, MODE_FOCUS);
1958 break;
1959 case 1006: /* 1006: extended reporting mode */
1960 MODBIT(term.mode, set, MODE_MOUSESGR);
1961 break;
1962 case 1034:
1963 MODBIT(term.mode, set, MODE_8BIT);
1964 break;
1965 case 1049: /* swap screen & set/restore cursor as xterm */
1966 if (!allowaltscreen)
1967 break;
1968 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1969 /* FALLTHROUGH */
1970 case 47: /* swap screen */
1971 case 1047:
1972 if (!allowaltscreen)
1973 break;
1974 alt = IS_SET(MODE_ALTSCREEN);
1975 if(alt) {
1976 tclearregion(0, 0, term.col-1,
1977 term.row-1);
1978 }
1979 if(set ^ alt) /* set is always 1 or 0 */
1980 tswapscreen();
1981 if(*args != 1049)
1982 break;
1983 /* FALLTHROUGH */
1984 case 1048:
1985 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1986 break;
1987 case 2004: /* 2004: bracketed paste mode */
1988 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1989 break;
1990 /* Not implemented mouse modes. See comments there. */
1991 case 1001: /* mouse highlight mode; can hang the
1992 terminal by design when implemented. */
1993 case 1005: /* UTF-8 mouse mode; will confuse
1994 applications not supporting UTF-8
1995 and luit. */
1996 case 1015: /* urxvt mangled mouse mode; incompatible
1997 and can be mistaken for other control
1998 codes. */
1999 default:
2000 fprintf(stderr,
2001 "erresc: unknown private set/reset mode %d\n",
2002 *args);
2003 break;
2004 }
2005 } else {
2006 switch(*args) {
2007 case 0: /* Error (IGNORED) */
2008 break;
2009 case 2: /* KAM -- keyboard action */
2010 MODBIT(term.mode, set, MODE_KBDLOCK);
2011 break;
2012 case 4: /* IRM -- Insertion-replacement */
2013 MODBIT(term.mode, set, MODE_INSERT);
2014 break;
2015 case 12: /* SRM -- Send/Receive */
2016 MODBIT(term.mode, !set, MODE_ECHO);
2017 break;
2018 case 20: /* LNM -- Linefeed/new line */
2019 MODBIT(term.mode, set, MODE_CRLF);
2020 break;
2021 default:
2022 fprintf(stderr,
2023 "erresc: unknown set/reset mode %d\n",
2024 *args);
2025 break;
2026 }
2027 }
2028 }
2029 }
2030
2031 void
2032 csihandle(void) {
2033 char buf[40];
2034 int len;
2035
2036 switch(csiescseq.mode[0]) {
2037 default:
2038 unknown:
2039 fprintf(stderr, "erresc: unknown csi ");
2040 csidump();
2041 /* die(""); */
2042 break;
2043 case '@': /* ICH -- Insert <n> blank char */
2044 DEFAULT(csiescseq.arg[0], 1);
2045 tinsertblank(csiescseq.arg[0]);
2046 break;
2047 case 'A': /* CUU -- Cursor <n> Up */
2048 DEFAULT(csiescseq.arg[0], 1);
2049 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2050 break;
2051 case 'B': /* CUD -- Cursor <n> Down */
2052 case 'e': /* VPR --Cursor <n> Down */
2053 DEFAULT(csiescseq.arg[0], 1);
2054 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2055 break;
2056 case 'i': /* MC -- Media Copy */
2057 switch(csiescseq.arg[0]) {
2058 case 0:
2059 tdump();
2060 break;
2061 case 1:
2062 tdumpline(term.c.y);
2063 break;
2064 case 2:
2065 tdumpsel();
2066 break;
2067 case 4:
2068 term.mode &= ~MODE_PRINT;
2069 break;
2070 case 5:
2071 term.mode |= MODE_PRINT;
2072 break;
2073 }
2074 break;
2075 case 'c': /* DA -- Device Attributes */
2076 if(csiescseq.arg[0] == 0)
2077 ttywrite(vtiden, sizeof(vtiden) - 1);
2078 break;
2079 case 'C': /* CUF -- Cursor <n> Forward */
2080 case 'a': /* HPR -- Cursor <n> Forward */
2081 DEFAULT(csiescseq.arg[0], 1);
2082 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2083 break;
2084 case 'D': /* CUB -- Cursor <n> Backward */
2085 DEFAULT(csiescseq.arg[0], 1);
2086 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2087 break;
2088 case 'E': /* CNL -- Cursor <n> Down and first col */
2089 DEFAULT(csiescseq.arg[0], 1);
2090 tmoveto(0, term.c.y+csiescseq.arg[0]);
2091 break;
2092 case 'F': /* CPL -- Cursor <n> Up and first col */
2093 DEFAULT(csiescseq.arg[0], 1);
2094 tmoveto(0, term.c.y-csiescseq.arg[0]);
2095 break;
2096 case 'g': /* TBC -- Tabulation clear */
2097 switch(csiescseq.arg[0]) {
2098 case 0: /* clear current tab stop */
2099 term.tabs[term.c.x] = 0;
2100 break;
2101 case 3: /* clear all the tabs */
2102 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2103 break;
2104 default:
2105 goto unknown;
2106 }
2107 break;
2108 case 'G': /* CHA -- Move to <col> */
2109 case '`': /* HPA */
2110 DEFAULT(csiescseq.arg[0], 1);
2111 tmoveto(csiescseq.arg[0]-1, term.c.y);
2112 break;
2113 case 'H': /* CUP -- Move to <row> <col> */
2114 case 'f': /* HVP */
2115 DEFAULT(csiescseq.arg[0], 1);
2116 DEFAULT(csiescseq.arg[1], 1);
2117 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2118 break;
2119 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2120 DEFAULT(csiescseq.arg[0], 1);
2121 tputtab(csiescseq.arg[0]);
2122 break;
2123 case 'J': /* ED -- Clear screen */
2124 selclear(NULL);
2125 switch(csiescseq.arg[0]) {
2126 case 0: /* below */
2127 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2128 if(term.c.y < term.row-1) {
2129 tclearregion(0, term.c.y+1, term.col-1,
2130 term.row-1);
2131 }
2132 break;
2133 case 1: /* above */
2134 if(term.c.y > 1)
2135 tclearregion(0, 0, term.col-1, term.c.y-1);
2136 tclearregion(0, term.c.y, term.c.x, term.c.y);
2137 break;
2138 case 2: /* all */
2139 tclearregion(0, 0, term.col-1, term.row-1);
2140 break;
2141 default:
2142 goto unknown;
2143 }
2144 break;
2145 case 'K': /* EL -- Clear line */
2146 switch(csiescseq.arg[0]) {
2147 case 0: /* right */
2148 tclearregion(term.c.x, term.c.y, term.col-1,
2149 term.c.y);
2150 break;
2151 case 1: /* left */
2152 tclearregion(0, term.c.y, term.c.x, term.c.y);
2153 break;
2154 case 2: /* all */
2155 tclearregion(0, term.c.y, term.col-1, term.c.y);
2156 break;
2157 }
2158 break;
2159 case 'S': /* SU -- Scroll <n> line up */
2160 DEFAULT(csiescseq.arg[0], 1);
2161 tscrollup(term.top, csiescseq.arg[0]);
2162 break;
2163 case 'T': /* SD -- Scroll <n> line down */
2164 DEFAULT(csiescseq.arg[0], 1);
2165 tscrolldown(term.top, csiescseq.arg[0]);
2166 break;
2167 case 'L': /* IL -- Insert <n> blank lines */
2168 DEFAULT(csiescseq.arg[0], 1);
2169 tinsertblankline(csiescseq.arg[0]);
2170 break;
2171 case 'l': /* RM -- Reset Mode */
2172 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2173 break;
2174 case 'M': /* DL -- Delete <n> lines */
2175 DEFAULT(csiescseq.arg[0], 1);
2176 tdeleteline(csiescseq.arg[0]);
2177 break;
2178 case 'X': /* ECH -- Erase <n> char */
2179 DEFAULT(csiescseq.arg[0], 1);
2180 tclearregion(term.c.x, term.c.y,
2181 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2182 break;
2183 case 'P': /* DCH -- Delete <n> char */
2184 DEFAULT(csiescseq.arg[0], 1);
2185 tdeletechar(csiescseq.arg[0]);
2186 break;
2187 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2188 DEFAULT(csiescseq.arg[0], 1);
2189 tputtab(-csiescseq.arg[0]);
2190 break;
2191 case 'd': /* VPA -- Move to <row> */
2192 DEFAULT(csiescseq.arg[0], 1);
2193 tmoveato(term.c.x, csiescseq.arg[0]-1);
2194 break;
2195 case 'h': /* SM -- Set terminal mode */
2196 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2197 break;
2198 case 'm': /* SGR -- Terminal attribute (color) */
2199 tsetattr(csiescseq.arg, csiescseq.narg);
2200 break;
2201 case 'n': /* DSR – Device Status Report (cursor position) */
2202 if (csiescseq.arg[0] == 6) {
2203 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2204 term.c.y+1, term.c.x+1);
2205 ttywrite(buf, len);
2206 }
2207 break;
2208 case 'r': /* DECSTBM -- Set Scrolling Region */
2209 if(csiescseq.priv) {
2210 goto unknown;
2211 } else {
2212 DEFAULT(csiescseq.arg[0], 1);
2213 DEFAULT(csiescseq.arg[1], term.row);
2214 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2215 tmoveato(0, 0);
2216 }
2217 break;
2218 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2219 tcursor(CURSOR_SAVE);
2220 break;
2221 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2222 tcursor(CURSOR_LOAD);
2223 break;
2224 case ' ':
2225 switch (csiescseq.mode[1]) {
2226 case 'q': /* DECSCUSR -- Set Cursor Style */
2227 DEFAULT(csiescseq.arg[0], 1);
2228 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
2229 goto unknown;
2230 }
2231 xw.cursor = csiescseq.arg[0];
2232 break;
2233 default:
2234 goto unknown;
2235 }
2236 break;
2237 }
2238 }
2239
2240 void
2241 csidump(void) {
2242 int i;
2243 uint c;
2244
2245 printf("ESC[");
2246 for(i = 0; i < csiescseq.len; i++) {
2247 c = csiescseq.buf[i] & 0xff;
2248 if(isprint(c)) {
2249 putchar(c);
2250 } else if(c == '\n') {
2251 printf("(\\n)");
2252 } else if(c == '\r') {
2253 printf("(\\r)");
2254 } else if(c == 0x1b) {
2255 printf("(\\e)");
2256 } else {
2257 printf("(%02x)", c);
2258 }
2259 }
2260 putchar('\n');
2261 }
2262
2263 void
2264 csireset(void) {
2265 memset(&csiescseq, 0, sizeof(csiescseq));
2266 }
2267
2268 void
2269 strhandle(void) {
2270 char *p = NULL;
2271 int j, narg, par;
2272
2273 term.esc &= ~(ESC_STR_END|ESC_STR);
2274 strparse();
2275 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
2276
2277 switch(strescseq.type) {
2278 case ']': /* OSC -- Operating System Command */
2279 switch(par) {
2280 case 0:
2281 case 1:
2282 case 2:
2283 if(narg > 1)
2284 xsettitle(strescseq.args[1]);
2285 return;
2286 case 4: /* color set */
2287 if(narg < 3)
2288 break;
2289 p = strescseq.args[2];
2290 /* FALLTHROUGH */
2291 case 104: /* color reset, here p = NULL */
2292 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2293 if(xsetcolorname(j, p)) {
2294 fprintf(stderr, "erresc: invalid color %s\n", p);
2295 } else {
2296 /*
2297 * TODO if defaultbg color is changed, borders
2298 * are dirty
2299 */
2300 redraw();
2301 }
2302 return;
2303 }
2304 break;
2305 case 'k': /* old title set compatibility */
2306 xsettitle(strescseq.args[0]);
2307 return;
2308 case 'P': /* DCS -- Device Control String */
2309 case '_': /* APC -- Application Program Command */
2310 case '^': /* PM -- Privacy Message */
2311 return;
2312 }
2313
2314 fprintf(stderr, "erresc: unknown str ");
2315 strdump();
2316 }
2317
2318 void
2319 strparse(void) {
2320 int c;
2321 char *p = strescseq.buf;
2322
2323 strescseq.narg = 0;
2324 strescseq.buf[strescseq.len] = '\0';
2325
2326 if(*p == '\0')
2327 return;
2328
2329 while(strescseq.narg < STR_ARG_SIZ) {
2330 strescseq.args[strescseq.narg++] = p;
2331 while((c = *p) != ';' && c != '\0')
2332 ++p;
2333 if(c == '\0')
2334 return;
2335 *p++ = '\0';
2336 }
2337 }
2338
2339 void
2340 strdump(void) {
2341 int i;
2342 uint c;
2343
2344 printf("ESC%c", strescseq.type);
2345 for(i = 0; i < strescseq.len; i++) {
2346 c = strescseq.buf[i] & 0xff;
2347 if(c == '\0') {
2348 return;
2349 } else if(isprint(c)) {
2350 putchar(c);
2351 } else if(c == '\n') {
2352 printf("(\\n)");
2353 } else if(c == '\r') {
2354 printf("(\\r)");
2355 } else if(c == 0x1b) {
2356 printf("(\\e)");
2357 } else {
2358 printf("(%02x)", c);
2359 }
2360 }
2361 printf("ESC\\\n");
2362 }
2363
2364 void
2365 strreset(void) {
2366 memset(&strescseq, 0, sizeof(strescseq));
2367 }
2368
2369 void
2370 tprinter(char *s, size_t len) {
2371 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2372 fprintf(stderr, "Error writing in %s:%s\n",
2373 opt_io, strerror(errno));
2374 close(iofd);
2375 iofd = -1;
2376 }
2377 }
2378
2379 void
2380 toggleprinter(const Arg *arg) {
2381 term.mode ^= MODE_PRINT;
2382 }
2383
2384 void
2385 printscreen(const Arg *arg) {
2386 tdump();
2387 }
2388
2389 void
2390 printsel(const Arg *arg) {
2391 tdumpsel();
2392 }
2393
2394 void
2395 tdumpsel(void) {
2396 char *ptr;
2397
2398 if((ptr = getsel())) {
2399 tprinter(ptr, strlen(ptr));
2400 free(ptr);
2401 }
2402 }
2403
2404 void
2405 tdumpline(int n) {
2406 char buf[UTF_SIZ];
2407 Glyph *bp, *end;
2408
2409 bp = &term.line[n][0];
2410 end = &bp[MIN(tlinelen(n), term.col) - 1];
2411 if(bp != end || bp->u != ' ') {
2412 for( ;bp <= end; ++bp)
2413 tprinter(buf, utf8encode(bp->u, buf));
2414 }
2415 tprinter("\n", 1);
2416 }
2417
2418 void
2419 tdump(void) {
2420 int i;
2421
2422 for(i = 0; i < term.row; ++i)
2423 tdumpline(i);
2424 }
2425
2426 void
2427 tputtab(int n) {
2428 uint x = term.c.x;
2429
2430 if(n > 0) {
2431 while(x < term.col && n--)
2432 for(++x; x < term.col && !term.tabs[x]; ++x)
2433 /* nothing */ ;
2434 } else if(n < 0) {
2435 while(x > 0 && n++)
2436 for(--x; x > 0 && !term.tabs[x]; --x)
2437 /* nothing */ ;
2438 }
2439 term.c.x = LIMIT(x, 0, term.col-1);
2440 }
2441
2442 void
2443 techo(long u) {
2444 if(ISCONTROL(u)) { /* control code */
2445 if(u & 0x80) {
2446 u &= 0x7f;
2447 tputc('^');
2448 tputc('[');
2449 } else if(u != '\n' && u != '\r' && u != '\t') {
2450 u ^= 0x40;
2451 tputc('^');
2452 }
2453 }
2454 tputc(u);
2455 }
2456
2457 void
2458 tdeftran(char ascii) {
2459 static char cs[] = "0B";
2460 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2461 char *p;
2462
2463 if((p = strchr(cs, ascii)) == NULL) {
2464 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2465 } else {
2466 term.trantbl[term.icharset] = vcs[p - cs];
2467 }
2468 }
2469
2470 void
2471 tdectest(char c) {
2472 int x, y;
2473
2474 if(c == '8') { /* DEC screen alignment test. */
2475 for(x = 0; x < term.col; ++x) {
2476 for(y = 0; y < term.row; ++y)
2477 tsetchar('E', &term.c.attr, x, y);
2478 }
2479 }
2480 }
2481
2482 void
2483 tstrsequence(uchar c) {
2484 switch (c) {
2485 case 0x90: /* DCS -- Device Control String */
2486 c = 'P';
2487 break;
2488 case 0x9f: /* APC -- Application Program Command */
2489 c = '_';
2490 break;
2491 case 0x9e: /* PM -- Privacy Message */
2492 c = '^';
2493 break;
2494 case 0x9d: /* OSC -- Operating System Command */
2495 c = ']';
2496 break;
2497 }
2498 strreset();
2499 strescseq.type = c;
2500 term.esc |= ESC_STR;
2501 }
2502
2503 void
2504 tcontrolcode(uchar ascii) {
2505 switch(ascii) {
2506 case '\t': /* HT */
2507 tputtab(1);
2508 return;
2509 case '\b': /* BS */
2510 tmoveto(term.c.x-1, term.c.y);
2511 return;
2512 case '\r': /* CR */
2513 tmoveto(0, term.c.y);
2514 return;
2515 case '\f': /* LF */
2516 case '\v': /* VT */
2517 case '\n': /* LF */
2518 /* go to first col if the mode is set */
2519 tnewline(IS_SET(MODE_CRLF));
2520 return;
2521 case '\a': /* BEL */
2522 if(term.esc & ESC_STR_END) {
2523 /* backwards compatibility to xterm */
2524 strhandle();
2525 } else {
2526 if(!(xw.state & WIN_FOCUSED))
2527 xseturgency(1);
2528 if (bellvolume)
2529 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2530 }
2531 break;
2532 case '\033': /* ESC */
2533 csireset();
2534 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2535 term.esc |= ESC_START;
2536 return;
2537 case '\016': /* SO (LS1 -- Locking shift 1) */
2538 case '\017': /* SI (LS0 -- Locking shift 0) */
2539 term.charset = 1 - (ascii - '\016');
2540 return;
2541 case '\032': /* SUB */
2542 tsetchar('?', &term.c.attr, term.c.x, term.c.y);
2543 case '\030': /* CAN */
2544 csireset();
2545 break;
2546 case '\005': /* ENQ (IGNORED) */
2547 case '\000': /* NUL (IGNORED) */
2548 case '\021': /* XON (IGNORED) */
2549 case '\023': /* XOFF (IGNORED) */
2550 case 0177: /* DEL (IGNORED) */
2551 return;
2552 case 0x84: /* TODO: IND */
2553 break;
2554 case 0x85: /* NEL -- Next line */
2555 tnewline(1); /* always go to first col */
2556 break;
2557 case 0x88: /* HTS -- Horizontal tab stop */
2558 term.tabs[term.c.x] = 1;
2559 break;
2560 case 0x8d: /* TODO: RI */
2561 case 0x8e: /* TODO: SS2 */
2562 case 0x8f: /* TODO: SS3 */
2563 case 0x98: /* TODO: SOS */
2564 break;
2565 case 0x9a: /* DECID -- Identify Terminal */
2566 ttywrite(vtiden, sizeof(vtiden) - 1);
2567 break;
2568 case 0x9b: /* TODO: CSI */
2569 case 0x9c: /* TODO: ST */
2570 break;
2571 case 0x90: /* DCS -- Device Control String */
2572 case 0x9f: /* APC -- Application Program Command */
2573 case 0x9e: /* PM -- Privacy Message */
2574 case 0x9d: /* OSC -- Operating System Command */
2575 tstrsequence(ascii);
2576 return;
2577 }
2578 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2579 term.esc &= ~(ESC_STR_END|ESC_STR);
2580 }
2581
2582 /*
2583 * returns 1 when the sequence is finished and it hasn't to read
2584 * more characters for this sequence, otherwise 0
2585 */
2586 int
2587 eschandle(uchar ascii) {
2588 switch(ascii) {
2589 case '[':
2590 term.esc |= ESC_CSI;
2591 return 0;
2592 case '#':
2593 term.esc |= ESC_TEST;
2594 return 0;
2595 case 'P': /* DCS -- Device Control String */
2596 case '_': /* APC -- Application Program Command */
2597 case '^': /* PM -- Privacy Message */
2598 case ']': /* OSC -- Operating System Command */
2599 case 'k': /* old title set compatibility */
2600 tstrsequence(ascii);
2601 return 0;
2602 case 'n': /* LS2 -- Locking shift 2 */
2603 case 'o': /* LS3 -- Locking shift 3 */
2604 term.charset = 2 + (ascii - 'n');
2605 break;
2606 case '(': /* GZD4 -- set primary charset G0 */
2607 case ')': /* G1D4 -- set secondary charset G1 */
2608 case '*': /* G2D4 -- set tertiary charset G2 */
2609 case '+': /* G3D4 -- set quaternary charset G3 */
2610 term.icharset = ascii - '(';
2611 term.esc |= ESC_ALTCHARSET;
2612 return 0;
2613 case 'D': /* IND -- Linefeed */
2614 if(term.c.y == term.bot) {
2615 tscrollup(term.top, 1);
2616 } else {
2617 tmoveto(term.c.x, term.c.y+1);
2618 }
2619 break;
2620 case 'E': /* NEL -- Next line */
2621 tnewline(1); /* always go to first col */
2622 break;
2623 case 'H': /* HTS -- Horizontal tab stop */
2624 term.tabs[term.c.x] = 1;
2625 break;
2626 case 'M': /* RI -- Reverse index */
2627 if(term.c.y == term.top) {
2628 tscrolldown(term.top, 1);
2629 } else {
2630 tmoveto(term.c.x, term.c.y-1);
2631 }
2632 break;
2633 case 'Z': /* DECID -- Identify Terminal */
2634 ttywrite(vtiden, sizeof(vtiden) - 1);
2635 break;
2636 case 'c': /* RIS -- Reset to inital state */
2637 treset();
2638 xresettitle();
2639 xloadcols();
2640 break;
2641 case '=': /* DECPAM -- Application keypad */
2642 term.mode |= MODE_APPKEYPAD;
2643 break;
2644 case '>': /* DECPNM -- Normal keypad */
2645 term.mode &= ~MODE_APPKEYPAD;
2646 break;
2647 case '7': /* DECSC -- Save Cursor */
2648 tcursor(CURSOR_SAVE);
2649 break;
2650 case '8': /* DECRC -- Restore Cursor */
2651 tcursor(CURSOR_LOAD);
2652 break;
2653 case '\\': /* ST -- String Terminator */
2654 if(term.esc & ESC_STR_END)
2655 strhandle();
2656 break;
2657 default:
2658 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2659 (uchar) ascii, isprint(ascii)? ascii:'.');
2660 break;
2661 }
2662 return 1;
2663 }
2664
2665 void
2666 tputc(long u) {
2667 char c[UTF_SIZ];
2668 bool control;
2669 int width, len;
2670 Glyph *gp;
2671
2672 len = utf8encode(u, c);
2673 if((width = wcwidth(u)) == -1) {
2674 memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
2675 width = 1;
2676 }
2677
2678 if(IS_SET(MODE_PRINT))
2679 tprinter(c, len);
2680 control = ISCONTROL(u);
2681
2682 /*
2683 * STR sequence must be checked before anything else
2684 * because it uses all following characters until it
2685 * receives a ESC, a SUB, a ST or any other C1 control
2686 * character.
2687 */
2688 if(term.esc & ESC_STR) {
2689 if(u == '\a' || u == 030 || u == 032 || u == 033 ||
2690 ISCONTROLC1(u)) {
2691 term.esc &= ~(ESC_START|ESC_STR);
2692 term.esc |= ESC_STR_END;
2693 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2694 memmove(&strescseq.buf[strescseq.len], c, len);
2695 strescseq.len += len;
2696 return;
2697 } else {
2698 /*
2699 * Here is a bug in terminals. If the user never sends
2700 * some code to stop the str or esc command, then st
2701 * will stop responding. But this is better than
2702 * silently failing with unknown characters. At least
2703 * then users will report back.
2704 *
2705 * In the case users ever get fixed, here is the code:
2706 */
2707 /*
2708 * term.esc = 0;
2709 * strhandle();
2710 */
2711 return;
2712 }
2713 }
2714
2715 /*
2716 * Actions of control codes must be performed as soon they arrive
2717 * because they can be embedded inside a control sequence, and
2718 * they must not cause conflicts with sequences.
2719 */
2720 if(control) {
2721 tcontrolcode(u);
2722 /*
2723 * control codes are not shown ever
2724 */
2725 return;
2726 } else if(term.esc & ESC_START) {
2727 if(term.esc & ESC_CSI) {
2728 csiescseq.buf[csiescseq.len++] = u;
2729 if(BETWEEN(u, 0x40, 0x7E)
2730 || csiescseq.len >= \
2731 sizeof(csiescseq.buf)-1) {
2732 term.esc = 0;
2733 csiparse();
2734 csihandle();
2735 }
2736 return;
2737 } else if(term.esc & ESC_ALTCHARSET) {
2738 tdeftran(u);
2739 } else if(term.esc & ESC_TEST) {
2740 tdectest(u);
2741 } else {
2742 if (!eschandle(u))
2743 return;
2744 /* sequence already finished */
2745 }
2746 term.esc = 0;
2747 /*
2748 * All characters which form part of a sequence are not
2749 * printed
2750 */
2751 return;
2752 }
2753 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2754 selclear(NULL);
2755
2756 gp = &term.line[term.c.y][term.c.x];
2757 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2758 gp->mode |= ATTR_WRAP;
2759 tnewline(1);
2760 gp = &term.line[term.c.y][term.c.x];
2761 }
2762
2763 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2764 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2765
2766 if(term.c.x+width > term.col) {
2767 tnewline(1);
2768 gp = &term.line[term.c.y][term.c.x];
2769 }
2770
2771 tsetchar(u, &term.c.attr, term.c.x, term.c.y);
2772
2773 if(width == 2) {
2774 gp->mode |= ATTR_WIDE;
2775 if(term.c.x+1 < term.col) {
2776 gp[1].u = '\0';
2777 gp[1].mode = ATTR_WDUMMY;
2778 }
2779 }
2780 if(term.c.x+width < term.col) {
2781 tmoveto(term.c.x+width, term.c.y);
2782 } else {
2783 term.c.state |= CURSOR_WRAPNEXT;
2784 }
2785 }
2786
2787 void
2788 tresize(int col, int row) {
2789 int i;
2790 int minrow = MIN(row, term.row);
2791 int mincol = MIN(col, term.col);
2792 bool *bp;
2793 TCursor c;
2794
2795 if(col < 1 || row < 1) {
2796 fprintf(stderr,
2797 "tresize: error resizing to %dx%d\n", col, row);
2798 return;
2799 }
2800
2801 /*
2802 * slide screen to keep cursor where we expect it -
2803 * tscrollup would work here, but we can optimize to
2804 * memmove because we're freeing the earlier lines
2805 */
2806 for(i = 0; i <= term.c.y - row; i++) {
2807 free(term.line[i]);
2808 free(term.alt[i]);
2809 }
2810 /* ensure that both src and dst are not NULL */
2811 if (i > 0) {
2812 memmove(term.line, term.line + i, row * sizeof(Line));
2813 memmove(term.alt, term.alt + i, row * sizeof(Line));
2814 }
2815 for(i += row; i < term.row; i++) {
2816 free(term.line[i]);
2817 free(term.alt[i]);
2818 }
2819
2820 /* resize to new height */
2821 term.line = xrealloc(term.line, row * sizeof(Line));
2822 term.alt = xrealloc(term.alt, row * sizeof(Line));
2823 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2824 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2825
2826 /* resize each row to new width, zero-pad if needed */
2827 for(i = 0; i < minrow; i++) {
2828 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2829 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2830 }
2831
2832 /* allocate any new rows */
2833 for(/* i == minrow */; i < row; i++) {
2834 term.line[i] = xmalloc(col * sizeof(Glyph));
2835 term.alt[i] = xmalloc(col * sizeof(Glyph));
2836 }
2837 if(col > term.col) {
2838 bp = term.tabs + term.col;
2839
2840 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2841 while(--bp > term.tabs && !*bp)
2842 /* nothing */ ;
2843 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2844 *bp = 1;
2845 }
2846 /* update terminal size */
2847 term.col = col;
2848 term.row = row;
2849 /* reset scrolling region */
2850 tsetscroll(0, row-1);
2851 /* make use of the LIMIT in tmoveto */
2852 tmoveto(term.c.x, term.c.y);
2853 /* Clearing both screens (it makes dirty all lines) */
2854 c = term.c;
2855 for(i = 0; i < 2; i++) {
2856 if(mincol < col && 0 < minrow) {
2857 tclearregion(mincol, 0, col - 1, minrow - 1);
2858 }
2859 if(0 < col && minrow < row) {
2860 tclearregion(0, minrow, col - 1, row - 1);
2861 }
2862 tswapscreen();
2863 tcursor(CURSOR_LOAD);
2864 }
2865 term.c = c;
2866 }
2867
2868 void
2869 xresize(int col, int row) {
2870 xw.tw = MAX(1, col * xw.cw);
2871 xw.th = MAX(1, row * xw.ch);
2872
2873 XFreePixmap(xw.dpy, xw.buf);
2874 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2875 DefaultDepth(xw.dpy, xw.scr));
2876 XftDrawChange(xw.draw, xw.buf);
2877 xclear(0, 0, xw.w, xw.h);
2878 }
2879
2880 ushort
2881 sixd_to_16bit(int x) {
2882 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2883 }
2884
2885 bool
2886 xloadcolor(int i, const char *name, Color *ncolor) {
2887 XRenderColor color = { .alpha = 0xffff };
2888
2889 if(!name) {
2890 if(BETWEEN(i, 16, 255)) { /* 256 color */
2891 if(i < 6*6*6+16) { /* same colors as xterm */
2892 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2893 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2894 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2895 } else { /* greyscale */
2896 color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
2897 color.green = color.blue = color.red;
2898 }
2899 return XftColorAllocValue(xw.dpy, xw.vis,
2900 xw.cmap, &color, ncolor);
2901 } else
2902 name = colorname[i];
2903 }
2904 return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
2905 }
2906
2907 void
2908 xloadcols(void) {
2909 int i;
2910 static bool loaded;
2911 Color *cp;
2912
2913 if(loaded) {
2914 for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
2915 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2916 }
2917
2918 for(i = 0; i < LEN(dc.col); i++)
2919 if(!xloadcolor(i, NULL, &dc.col[i])) {
2920 if(colorname[i])
2921 die("Could not allocate color '%s'\n", colorname[i]);
2922 else
2923 die("Could not allocate color %d\n", i);
2924 }
2925 loaded = true;
2926 }
2927
2928 int
2929 xsetcolorname(int x, const char *name) {
2930 Color ncolor;
2931
2932 if(!BETWEEN(x, 0, LEN(dc.col)))
2933 return 1;
2934
2935
2936 if(!xloadcolor(x, name, &ncolor))
2937 return 1;
2938
2939 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2940 dc.col[x] = ncolor;
2941 return 0;
2942 }
2943
2944 void
2945 xtermclear(int col1, int row1, int col2, int row2) {
2946 XftDrawRect(xw.draw,
2947 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2948 borderpx + col1 * xw.cw,
2949 borderpx + row1 * xw.ch,
2950 (col2-col1+1) * xw.cw,
2951 (row2-row1+1) * xw.ch);
2952 }
2953
2954 /*
2955 * Absolute coordinates.
2956 */
2957 void
2958 xclear(int x1, int y1, int x2, int y2) {
2959 XftDrawRect(xw.draw,
2960 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2961 x1, y1, x2-x1, y2-y1);
2962 }
2963
2964 void
2965 xhints(void) {
2966 XClassHint class = {opt_class ? opt_class : termname, termname};
2967 XWMHints wm = {.flags = InputHint, .input = 1};
2968 XSizeHints *sizeh = NULL;
2969
2970 sizeh = XAllocSizeHints();
2971
2972 sizeh->flags = PSize | PResizeInc | PBaseSize;
2973 sizeh->height = xw.h;
2974 sizeh->width = xw.w;
2975 sizeh->height_inc = xw.ch;
2976 sizeh->width_inc = xw.cw;
2977 sizeh->base_height = 2 * borderpx;
2978 sizeh->base_width = 2 * borderpx;
2979 if(xw.isfixed == True) {
2980 sizeh->flags |= PMaxSize | PMinSize;
2981 sizeh->min_width = sizeh->max_width = xw.w;
2982 sizeh->min_height = sizeh->max_height = xw.h;
2983 }
2984 if(xw.gm & (XValue|YValue)) {
2985 sizeh->flags |= USPosition | PWinGravity;
2986 sizeh->x = xw.l;
2987 sizeh->y = xw.t;
2988 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2989 }
2990
2991 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2992 &class);
2993 XFree(sizeh);
2994 }
2995
2996 int
2997 xgeommasktogravity(int mask) {
2998 switch(mask & (XNegative|YNegative)) {
2999 case 0:
3000 return NorthWestGravity;
3001 case XNegative:
3002 return NorthEastGravity;
3003 case YNegative:
3004 return SouthWestGravity;
3005 }
3006 return SouthEastGravity;
3007 }
3008
3009 int
3010 xloadfont(Font *f, FcPattern *pattern) {
3011 FcPattern *match;
3012 FcResult result;
3013
3014 match = FcFontMatch(NULL, pattern, &result);
3015 if(!match)
3016 return 1;
3017
3018 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
3019 FcPatternDestroy(match);
3020 return 1;
3021 }
3022
3023 f->set = NULL;
3024 f->pattern = FcPatternDuplicate(pattern);
3025
3026 f->ascent = f->match->ascent;
3027 f->descent = f->match->descent;
3028 f->lbearing = 0;
3029 f->rbearing = f->match->max_advance_width;
3030
3031 f->height = f->ascent + f->descent;
3032 f->width = f->lbearing + f->rbearing;
3033
3034 return 0;
3035 }
3036
3037 void
3038 xloadfonts(char *fontstr, double fontsize) {
3039 FcPattern *pattern;
3040 FcResult r_sz, r_psz;
3041 double fontval;
3042 float ceilf(float);
3043
3044 if(fontstr[0] == '-') {
3045 pattern = XftXlfdParse(fontstr, False, False);
3046 } else {
3047 pattern = FcNameParse((FcChar8 *)fontstr);
3048 }
3049
3050 if(!pattern)
3051 die("st: can't open font %s\n", fontstr);
3052
3053 if(fontsize > 1) {
3054 FcPatternDel(pattern, FC_PIXEL_SIZE);
3055 FcPatternDel(pattern, FC_SIZE);
3056 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3057 usedfontsize = fontsize;
3058 } else {
3059 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3060 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3061 if(r_psz == FcResultMatch) {
3062 usedfontsize = fontval;
3063 } else if(r_sz == FcResultMatch) {
3064 usedfontsize = -1;
3065 } else {
3066 /*
3067 * Default font size is 12, if none given. This is to
3068 * have a known usedfontsize value.
3069 */
3070 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3071 usedfontsize = 12;
3072 }
3073 defaultfontsize = usedfontsize;
3074 }
3075
3076 FcConfigSubstitute(0, pattern, FcMatchPattern);
3077 FcDefaultSubstitute(pattern);
3078
3079 if(xloadfont(&dc.font, pattern))
3080 die("st: can't open font %s\n", fontstr);
3081
3082 if(usedfontsize < 0) {
3083 FcPatternGetDouble(dc.font.match->pattern,
3084 FC_PIXEL_SIZE, 0, &fontval);
3085 usedfontsize = fontval;
3086 if(fontsize == 0)
3087 defaultfontsize = fontval;
3088 }
3089
3090 /* Setting character width and height. */
3091 xw.cw = ceilf(dc.font.width * cwscale);
3092 xw.ch = ceilf(dc.font.height * chscale);
3093
3094 FcPatternDel(pattern, FC_SLANT);
3095 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3096 if(xloadfont(&dc.ifont, pattern))
3097 die("st: can't open font %s\n", fontstr);
3098
3099 FcPatternDel(pattern, FC_WEIGHT);
3100 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3101 if(xloadfont(&dc.ibfont, pattern))
3102 die("st: can't open font %s\n", fontstr);
3103
3104 FcPatternDel(pattern, FC_SLANT);
3105 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3106 if(xloadfont(&dc.bfont, pattern))
3107 die("st: can't open font %s\n", fontstr);
3108
3109 FcPatternDestroy(pattern);
3110 }
3111
3112 void
3113 xunloadfont(Font *f) {
3114 XftFontClose(xw.dpy, f->match);
3115 FcPatternDestroy(f->pattern);
3116 if(f->set)
3117 FcFontSetDestroy(f->set);
3118 }
3119
3120 void
3121 xunloadfonts(void) {
3122 /* Free the loaded fonts in the font cache. */
3123 while(frclen > 0)
3124 XftFontClose(xw.dpy, frc[--frclen].font);
3125
3126 xunloadfont(&dc.font);
3127 xunloadfont(&dc.bfont);
3128 xunloadfont(&dc.ifont);
3129 xunloadfont(&dc.ibfont);
3130 }
3131
3132 void
3133 xzoom(const Arg *arg) {
3134 Arg larg;
3135
3136 larg.i = usedfontsize + arg->i;
3137 xzoomabs(&larg);
3138 }
3139
3140 void
3141 xzoomabs(const Arg *arg) {
3142 xunloadfonts();
3143 xloadfonts(usedfont, arg->i);
3144 cresize(0, 0);
3145 redraw();
3146 xhints();
3147 }
3148
3149 void
3150 xzoomreset(const Arg *arg) {
3151 Arg larg;
3152
3153 if(defaultfontsize > 0) {
3154 larg.i = defaultfontsize;
3155 xzoomabs(&larg);
3156 }
3157 }
3158
3159 void
3160 xinit(void) {
3161 XGCValues gcvalues;
3162 Cursor cursor;
3163 Window parent;
3164 pid_t thispid = getpid();
3165
3166 if(!(xw.dpy = XOpenDisplay(NULL)))
3167 die("Can't open display\n");
3168 xw.scr = XDefaultScreen(xw.dpy);
3169 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3170
3171 /* font */
3172 if(!FcInit())
3173 die("Could not init fontconfig.\n");
3174
3175 usedfont = (opt_font == NULL)? font : opt_font;
3176 xloadfonts(usedfont, 0);
3177
3178 /* colors */
3179 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3180 xloadcols();
3181
3182 /* adjust fixed window geometry */
3183 xw.w = 2 * borderpx + term.col * xw.cw;
3184 xw.h = 2 * borderpx + term.row * xw.ch;
3185 if(xw.gm & XNegative)
3186 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3187 if(xw.gm & YNegative)
3188 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3189
3190 /* Events */
3191 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3192 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3193 xw.attrs.bit_gravity = NorthWestGravity;
3194 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3195 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3196 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3197 xw.attrs.colormap = xw.cmap;
3198
3199 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3200 parent = XRootWindow(xw.dpy, xw.scr);
3201 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3202 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3203 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3204 | CWEventMask | CWColormap, &xw.attrs);
3205
3206 memset(&gcvalues, 0, sizeof(gcvalues));
3207 gcvalues.graphics_exposures = False;
3208 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3209 &gcvalues);
3210 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3211 DefaultDepth(xw.dpy, xw.scr));
3212 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3213 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3214
3215 /* Xft rendering context */
3216 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3217
3218 /* input methods */
3219 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3220 XSetLocaleModifiers("@im=local");
3221 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3222 XSetLocaleModifiers("@im=");
3223 if((xw.xim = XOpenIM(xw.dpy,
3224 NULL, NULL, NULL)) == NULL) {
3225 die("XOpenIM failed. Could not open input"
3226 " device.\n");
3227 }
3228 }
3229 }
3230 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3231 | XIMStatusNothing, XNClientWindow, xw.win,
3232 XNFocusWindow, xw.win, NULL);
3233 if(xw.xic == NULL)
3234 die("XCreateIC failed. Could not obtain input method.\n");
3235
3236 /* white cursor, black outline */
3237 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3238 XDefineCursor(xw.dpy, xw.win, cursor);
3239 XRecolorCursor(xw.dpy, cursor,
3240 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3241 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3242
3243 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3244 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3245 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3246 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3247
3248 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3249 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3250 PropModeReplace, (uchar *)&thispid, 1);
3251
3252 xresettitle();
3253 XMapWindow(xw.dpy, xw.win);
3254 xhints();
3255 XSync(xw.dpy, False);
3256 }
3257
3258 void
3259 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3260 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3261 width = charlen * xw.cw, xp, i;
3262 int frcflags, charexists;
3263 int u8fl, u8fblen, u8cblen, doesexist;
3264 char *u8c, *u8fs;
3265 long unicodep;
3266 Font *font = &dc.font;
3267 FcResult fcres;
3268 FcPattern *fcpattern, *fontpattern;
3269 FcFontSet *fcsets[] = { NULL };
3270 FcCharSet *fccharset;
3271 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3272 XRenderColor colfg, colbg;
3273 XRectangle r;
3274 int oneatatime;
3275
3276 frcflags = FRC_NORMAL;
3277
3278 if(base.mode & ATTR_ITALIC) {
3279 if(base.fg == defaultfg)
3280 base.fg = defaultitalic;
3281 font = &dc.ifont;
3282 frcflags = FRC_ITALIC;
3283 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3284 if(base.fg == defaultfg)
3285 base.fg = defaultitalic;
3286 font = &dc.ibfont;
3287 frcflags = FRC_ITALICBOLD;
3288 } else if(base.mode & ATTR_UNDERLINE) {
3289 if(base.fg == defaultfg)
3290 base.fg = defaultunderline;
3291 }
3292
3293 if(IS_TRUECOL(base.fg)) {
3294 colfg.alpha = 0xffff;
3295 colfg.red = TRUERED(base.fg);
3296 colfg.green = TRUEGREEN(base.fg);
3297 colfg.blue = TRUEBLUE(base.fg);
3298 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3299 fg = &truefg;
3300 } else {
3301 fg = &dc.col[base.fg];
3302 }
3303
3304 if(IS_TRUECOL(base.bg)) {
3305 colbg.alpha = 0xffff;
3306 colbg.green = TRUEGREEN(base.bg);
3307 colbg.red = TRUERED(base.bg);
3308 colbg.blue = TRUEBLUE(base.bg);
3309 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3310 bg = &truebg;
3311 } else {
3312 bg = &dc.col[base.bg];
3313 }
3314
3315 if(base.mode & ATTR_BOLD) {
3316 /*
3317 * change basic system colors [0-7]
3318 * to bright system colors [8-15]
3319 */
3320 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3321 fg = &dc.col[base.fg + 8];
3322
3323 if(base.mode & ATTR_ITALIC) {
3324 font = &dc.ibfont;
3325 frcflags = FRC_ITALICBOLD;
3326 } else {
3327 font = &dc.bfont;
3328 frcflags = FRC_BOLD;
3329 }
3330 }
3331
3332 if(IS_SET(MODE_REVERSE)) {
3333 if(fg == &dc.col[defaultfg]) {
3334 fg = &dc.col[defaultbg];
3335 } else {
3336 colfg.red = ~fg->color.red;
3337 colfg.green = ~fg->color.green;
3338 colfg.blue = ~fg->color.blue;
3339 colfg.alpha = fg->color.alpha;
3340 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3341 &revfg);
3342 fg = &revfg;
3343 }
3344
3345 if(bg == &dc.col[defaultbg]) {
3346 bg = &dc.col[defaultfg];
3347 } else {
3348 colbg.red = ~bg->color.red;
3349 colbg.green = ~bg->color.green;
3350 colbg.blue = ~bg->color.blue;
3351 colbg.alpha = bg->color.alpha;
3352 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3353 &revbg);
3354 bg = &revbg;
3355 }
3356 }
3357
3358 if(base.mode & ATTR_REVERSE) {
3359 temp = fg;
3360 fg = bg;
3361 bg = temp;
3362 }
3363
3364 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3365 colfg.red = fg->color.red / 2;
3366 colfg.green = fg->color.green / 2;
3367 colfg.blue = fg->color.blue / 2;
3368 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3369 fg = &revfg;
3370 }
3371
3372 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3373 fg = bg;
3374
3375 if(base.mode & ATTR_INVISIBLE)
3376 fg = bg;
3377
3378 /* Intelligent cleaning up of the borders. */
3379 if(x == 0) {
3380 xclear(0, (y == 0)? 0 : winy, borderpx,
3381 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3382 }
3383 if(x + charlen >= term.col) {
3384 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3385 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3386 }
3387 if(y == 0)
3388 xclear(winx, 0, winx + width, borderpx);
3389 if(y == term.row-1)
3390 xclear(winx, winy + xw.ch, winx + width, xw.h);
3391
3392 /* Clean up the region we want to draw to. */
3393 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3394
3395 /* Set the clip region because Xft is sometimes dirty. */
3396 r.x = 0;
3397 r.y = 0;
3398 r.height = xw.ch;
3399 r.width = width;
3400 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3401
3402 for(xp = winx; bytelen > 0;) {
3403 /*
3404 * Search for the range in the to be printed string of glyphs
3405 * that are in the main font. Then print that range. If
3406 * some glyph is found that is not in the font, do the
3407 * fallback dance.
3408 */
3409 u8fs = s;
3410 u8fblen = 0;
3411 u8fl = 0;
3412 oneatatime = font->width != xw.cw;
3413 for(;;) {
3414 u8c = s;
3415 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3416 s += u8cblen;
3417 bytelen -= u8cblen;
3418
3419 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3420 if(doesexist) {
3421 u8fl++;
3422 u8fblen += u8cblen;
3423 if(!oneatatime && bytelen > 0)
3424 continue;
3425 }
3426
3427 if(u8fl > 0) {
3428 XftDrawStringUtf8(xw.draw, fg,
3429 font->match, xp,
3430 winy + font->ascent,
3431 (FcChar8 *)u8fs,
3432 u8fblen);
3433 xp += xw.cw * u8fl;
3434 }
3435 break;
3436 }
3437 if(doesexist) {
3438 if(oneatatime)
3439 continue;
3440 break;
3441 }
3442
3443 /* Search the font cache. */
3444 for(i = 0; i < frclen; i++) {
3445 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3446 /* Everything correct. */
3447 if(charexists && frc[i].flags == frcflags)
3448 break;
3449 /* We got a default font for a not found glyph. */
3450 if(!charexists && frc[i].flags == frcflags \
3451 && frc[i].unicodep == unicodep) {
3452 break;
3453 }
3454 }
3455
3456 /* Nothing was found. */
3457 if(i >= frclen) {
3458 if(!font->set)
3459 font->set = FcFontSort(0, font->pattern,
3460 FcTrue, 0, &fcres);
3461 fcsets[0] = font->set;
3462
3463 /*
3464 * Nothing was found in the cache. Now use
3465 * some dozen of Fontconfig calls to get the
3466 * font for one single character.
3467 *
3468 * Xft and fontconfig are design failures.
3469 */
3470 fcpattern = FcPatternDuplicate(font->pattern);
3471 fccharset = FcCharSetCreate();
3472
3473 FcCharSetAddChar(fccharset, unicodep);
3474 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3475 fccharset);
3476 FcPatternAddBool(fcpattern, FC_SCALABLE,
3477 FcTrue);
3478
3479 FcConfigSubstitute(0, fcpattern,
3480 FcMatchPattern);
3481 FcDefaultSubstitute(fcpattern);
3482
3483 fontpattern = FcFontSetMatch(0, fcsets, 1,
3484 fcpattern, &fcres);
3485
3486 /*
3487 * Overwrite or create the new cache entry.
3488 */
3489 if(frclen >= LEN(frc)) {
3490 frclen = LEN(frc) - 1;
3491 XftFontClose(xw.dpy, frc[frclen].font);
3492 frc[frclen].unicodep = 0;
3493 }
3494
3495 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3496 fontpattern);
3497 frc[frclen].flags = frcflags;
3498 frc[frclen].unicodep = unicodep;
3499
3500 i = frclen;
3501 frclen++;
3502
3503 FcPatternDestroy(fcpattern);
3504 FcCharSetDestroy(fccharset);
3505 }
3506
3507 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3508 xp, winy + frc[i].font->ascent,
3509 (FcChar8 *)u8c, u8cblen);
3510
3511 xp += xw.cw * wcwidth(unicodep);
3512 }
3513
3514 /*
3515 * This is how the loop above actually should be. Why does the
3516 * application have to care about font details?
3517 *
3518 * I have to repeat: Xft and Fontconfig are design failures.
3519 */
3520 /*
3521 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3522 winy + font->ascent, (FcChar8 *)s, bytelen);
3523 */
3524
3525 if(base.mode & ATTR_UNDERLINE) {
3526 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3527 width, 1);
3528 }
3529
3530 if(base.mode & ATTR_STRUCK) {
3531 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3532 width, 1);
3533 }
3534
3535 /* Reset clip to none. */
3536 XftDrawSetClip(xw.draw, 0);
3537 }
3538
3539 void
3540 xdrawglyph(Glyph g, int x, int y) {
3541 static char buf[UTF_SIZ];
3542 size_t len = utf8encode(g.u, buf);
3543 int width = g.mode & ATTR_WIDE ? 2 : 1;
3544
3545 xdraws(buf, g, x, y, width, len);
3546 }
3547
3548 void
3549 xdrawcursor(void) {
3550 static int oldx = 0, oldy = 0;
3551 int curx;
3552 Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs};
3553
3554 LIMIT(oldx, 0, term.col-1);
3555 LIMIT(oldy, 0, term.row-1);
3556
3557 curx = term.c.x;
3558
3559 /* adjust position if in dummy */
3560 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3561 oldx--;
3562 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3563 curx--;
3564
3565 g.u = term.line[term.c.y][term.c.x].u;
3566
3567 /* remove the old cursor */
3568 xdrawglyph(term.line[oldy][oldx], oldx, oldy);
3569
3570 if(IS_SET(MODE_HIDE))
3571 return;
3572
3573 /* draw the new one */
3574 if(xw.state & WIN_FOCUSED) {
3575 switch (xw.cursor) {
3576 case 0: /* Blinking Block */
3577 case 1: /* Blinking Block (Default) */
3578 case 2: /* Steady Block */
3579 if(IS_SET(MODE_REVERSE)) {
3580 g.mode |= ATTR_REVERSE;
3581 g.fg = defaultcs;
3582 g.bg = defaultfg;
3583 }
3584
3585 g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
3586 xdrawglyph(g, term.c.x, term.c.y);
3587 break;
3588 case 3: /* Blinking Underline */
3589 case 4: /* Steady Underline */
3590 XftDrawRect(xw.draw, &dc.col[defaultcs],
3591 borderpx + curx * xw.cw,
3592 borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
3593 xw.cw, cursorthickness);
3594 break;
3595 case 5: /* Blinking bar */
3596 case 6: /* Steady bar */
3597 XftDrawRect(xw.draw, &dc.col[defaultcs],
3598 borderpx + curx * xw.cw,
3599 borderpx + term.c.y * xw.ch,
3600 cursorthickness, xw.ch);
3601 break;
3602 }
3603 } else {
3604 XftDrawRect(xw.draw, &dc.col[defaultcs],
3605 borderpx + curx * xw.cw,
3606 borderpx + term.c.y * xw.ch,
3607 xw.cw - 1, 1);
3608 XftDrawRect(xw.draw, &dc.col[defaultcs],
3609 borderpx + curx * xw.cw,
3610 borderpx + term.c.y * xw.ch,
3611 1, xw.ch - 1);
3612 XftDrawRect(xw.draw, &dc.col[defaultcs],
3613 borderpx + (curx + 1) * xw.cw - 1,
3614 borderpx + term.c.y * xw.ch,
3615 1, xw.ch - 1);
3616 XftDrawRect(xw.draw, &dc.col[defaultcs],
3617 borderpx + curx * xw.cw,
3618 borderpx + (term.c.y + 1) * xw.ch - 1,
3619 xw.cw, 1);
3620 }
3621 oldx = curx, oldy = term.c.y;
3622 }
3623
3624
3625 void
3626 xsettitle(char *p) {
3627 XTextProperty prop;
3628
3629 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3630 &prop);
3631 XSetWMName(xw.dpy, xw.win, &prop);
3632 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3633 XFree(prop.value);
3634 }
3635
3636 void
3637 xresettitle(void) {
3638 xsettitle(opt_title ? opt_title : "st");
3639 }
3640
3641 void
3642 redraw(void) {
3643 tfulldirt();
3644 draw();
3645 }
3646
3647 void
3648 draw(void) {
3649 drawregion(0, 0, term.col, term.row);
3650 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3651 xw.h, 0, 0);
3652 XSetForeground(xw.dpy, dc.gc,
3653 dc.col[IS_SET(MODE_REVERSE)?
3654 defaultfg : defaultbg].pixel);
3655 }
3656
3657 void
3658 drawregion(int x1, int y1, int x2, int y2) {
3659 int ic, ib, x, y, ox;
3660 Glyph base, new;
3661 char buf[DRAW_BUF_SIZ];
3662 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3663
3664 if(!(xw.state & WIN_VISIBLE))
3665 return;
3666
3667 for(y = y1; y < y2; y++) {
3668 if(!term.dirty[y])
3669 continue;
3670
3671 xtermclear(0, y, term.col, y);
3672 term.dirty[y] = 0;
3673 base = term.line[y][0];
3674 ic = ib = ox = 0;
3675 for(x = x1; x < x2; x++) {
3676 new = term.line[y][x];
3677 if(new.mode == ATTR_WDUMMY)
3678 continue;
3679 if(ena_sel && selected(x, y))
3680 new.mode ^= ATTR_REVERSE;
3681 if(ib > 0 && (ATTRCMP(base, new)
3682 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3683 xdraws(buf, base, ox, y, ic, ib);
3684 ic = ib = 0;
3685 }
3686 if(ib == 0) {
3687 ox = x;
3688 base = new;
3689 }
3690
3691 ib += utf8encode(new.u, buf+ib);
3692 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3693 }
3694 if(ib > 0)
3695 xdraws(buf, base, ox, y, ic, ib);
3696 }
3697 xdrawcursor();
3698 }
3699
3700 void
3701 expose(XEvent *ev) {
3702 redraw();
3703 }
3704
3705 void
3706 visibility(XEvent *ev) {
3707 XVisibilityEvent *e = &ev->xvisibility;
3708
3709 MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
3710 }
3711
3712 void
3713 unmap(XEvent *ev) {
3714 xw.state &= ~WIN_VISIBLE;
3715 }
3716
3717 void
3718 xsetpointermotion(int set) {
3719 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3720 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3721 }
3722
3723 void
3724 xseturgency(int add) {
3725 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3726
3727 MODBIT(h->flags, add, XUrgencyHint);
3728 XSetWMHints(xw.dpy, xw.win, h);
3729 XFree(h);
3730 }
3731
3732 void
3733 focus(XEvent *ev) {
3734 XFocusChangeEvent *e = &ev->xfocus;
3735
3736 if(e->mode == NotifyGrab)
3737 return;
3738
3739 if(ev->type == FocusIn) {
3740 XSetICFocus(xw.xic);
3741 xw.state |= WIN_FOCUSED;
3742 xseturgency(0);
3743 if(IS_SET(MODE_FOCUS))
3744 ttywrite("\033[I", 3);
3745 } else {
3746 XUnsetICFocus(xw.xic);
3747 xw.state &= ~WIN_FOCUSED;
3748 if(IS_SET(MODE_FOCUS))
3749 ttywrite("\033[O", 3);
3750 }
3751 }
3752
3753 bool
3754 match(uint mask, uint state) {
3755 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3756 }
3757
3758 void
3759 numlock(const Arg *dummy) {
3760 term.numlock ^= 1;
3761 }
3762
3763 char*
3764 kmap(KeySym k, uint state) {
3765 Key *kp;
3766 int i;
3767
3768 /* Check for mapped keys out of X11 function keys. */
3769 for(i = 0; i < LEN(mappedkeys); i++) {
3770 if(mappedkeys[i] == k)
3771 break;
3772 }
3773 if(i == LEN(mappedkeys)) {
3774 if((k & 0xFFFF) < 0xFD00)
3775 return NULL;
3776 }
3777
3778 for(kp = key; kp < key + LEN(key); kp++) {
3779 if(kp->k != k)
3780 continue;
3781
3782 if(!match(kp->mask, state))
3783 continue;
3784
3785 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3786 continue;
3787 if(term.numlock && kp->appkey == 2)
3788 continue;
3789
3790 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3791 continue;
3792
3793 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3794 continue;
3795
3796 return kp->s;
3797 }
3798
3799 return NULL;
3800 }
3801
3802 void
3803 kpress(XEvent *ev) {
3804 XKeyEvent *e = &ev->xkey;
3805 KeySym ksym;
3806 char buf[32], *customkey;
3807 int len;
3808 long c;
3809 Status status;
3810 Shortcut *bp;
3811
3812 if(IS_SET(MODE_KBDLOCK))
3813 return;
3814
3815 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3816 /* 1. shortcuts */
3817 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3818 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3819 bp->func(&(bp->arg));
3820 return;
3821 }
3822 }
3823
3824 /* 2. custom keys from config.h */
3825 if((customkey = kmap(ksym, e->state))) {
3826 ttysend(customkey, strlen(customkey));
3827 return;
3828 }
3829
3830 /* 3. composed string from input method */
3831 if(len == 0)
3832 return;
3833 if(len == 1 && e->state & Mod1Mask) {
3834 if(IS_SET(MODE_8BIT)) {
3835 if(*buf < 0177) {
3836 c = *buf | 0x80;
3837 len = utf8encode(c, buf);
3838 }
3839 } else {
3840 buf[1] = buf[0];
3841 buf[0] = '\033';
3842 len = 2;
3843 }
3844 }
3845 ttysend(buf, len);
3846 }
3847
3848
3849 void
3850 cmessage(XEvent *e) {
3851 /*
3852 * See xembed specs
3853 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3854 */
3855 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3856 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3857 xw.state |= WIN_FOCUSED;
3858 xseturgency(0);
3859 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3860 xw.state &= ~WIN_FOCUSED;
3861 }
3862 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3863 /* Send SIGHUP to shell */
3864 kill(pid, SIGHUP);
3865 exit(EXIT_SUCCESS);
3866 }
3867 }
3868
3869 void
3870 cresize(int width, int height) {
3871 int col, row;
3872
3873 if(width != 0)
3874 xw.w = width;
3875 if(height != 0)
3876 xw.h = height;
3877
3878 col = (xw.w - 2 * borderpx) / xw.cw;
3879 row = (xw.h - 2 * borderpx) / xw.ch;
3880
3881 tresize(col, row);
3882 xresize(col, row);
3883 ttyresize();
3884 }
3885
3886 void
3887 resize(XEvent *e) {
3888 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3889 return;
3890
3891 cresize(e->xconfigure.width, e->xconfigure.height);
3892 }
3893
3894 void
3895 run(void) {
3896 XEvent ev;
3897 int w = xw.w, h = xw.h;
3898 fd_set rfd;
3899 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3900 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3901 long deltatime;
3902
3903 /* Waiting for window mapping */
3904 do {
3905 XNextEvent(xw.dpy, &ev);
3906 if(ev.type == ConfigureNotify) {
3907 w = ev.xconfigure.width;
3908 h = ev.xconfigure.height;
3909 }
3910 } while(ev.type != MapNotify);
3911
3912 ttynew();
3913 cresize(w, h);
3914
3915 clock_gettime(CLOCK_MONOTONIC, &last);
3916 lastblink = last;
3917
3918 for(xev = actionfps;;) {
3919 FD_ZERO(&rfd);
3920 FD_SET(cmdfd, &rfd);
3921 FD_SET(xfd, &rfd);
3922
3923 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3924 if(errno == EINTR)
3925 continue;
3926 die("select failed: %s\n", strerror(errno));
3927 }
3928 if(FD_ISSET(cmdfd, &rfd)) {
3929 ttyread();
3930 if(blinktimeout) {
3931 blinkset = tattrset(ATTR_BLINK);
3932 if(!blinkset)
3933 MODBIT(term.mode, 0, MODE_BLINK);
3934 }
3935 }
3936
3937 if(FD_ISSET(xfd, &rfd))
3938 xev = actionfps;
3939
3940 clock_gettime(CLOCK_MONOTONIC, &now);
3941 drawtimeout.tv_sec = 0;
3942 drawtimeout.tv_nsec = (1000 * 1E6)/ xfps;
3943 tv = &drawtimeout;
3944
3945 dodraw = 0;
3946 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3947 tsetdirtattr(ATTR_BLINK);
3948 term.mode ^= MODE_BLINK;
3949 lastblink = now;
3950 dodraw = 1;
3951 }
3952 deltatime = TIMEDIFF(now, last);
3953 if(deltatime > 1000 / (xev ? xfps : actionfps)) {
3954 dodraw = 1;
3955 last = now;
3956 }
3957
3958 if(dodraw) {
3959 while(XPending(xw.dpy)) {
3960 XNextEvent(xw.dpy, &ev);
3961 if(XFilterEvent(&ev, None))
3962 continue;
3963 if(handler[ev.type])
3964 (handler[ev.type])(&ev);
3965 }
3966
3967 draw();
3968 XFlush(xw.dpy);
3969
3970 if(xev && !FD_ISSET(xfd, &rfd))
3971 xev--;
3972 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3973 if(blinkset) {
3974 if(TIMEDIFF(now, lastblink) \
3975 > blinktimeout) {
3976 drawtimeout.tv_nsec = 1000;
3977 } else {
3978 drawtimeout.tv_nsec = (1E6 * \
3979 (blinktimeout - \
3980 TIMEDIFF(now,
3981 lastblink)));
3982 }
3983 drawtimeout.tv_sec = \
3984 drawtimeout.tv_nsec / 1E9;
3985 drawtimeout.tv_nsec %= (long)1E9;
3986 } else {
3987 tv = NULL;
3988 }
3989 }
3990 }
3991 }
3992 }
3993
3994 void
3995 usage(void) {
3996 die("%s " VERSION " (c) 2010-2015 st engineers\n"
3997 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3998 " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
3999 " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
4000 " [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
4001 argv0);
4002 }
4003
4004 int
4005 main(int argc, char *argv[]) {
4006 uint cols = 80, rows = 24;
4007
4008 xw.l = xw.t = 0;
4009 xw.isfixed = False;
4010 xw.cursor = 0;
4011
4012 ARGBEGIN {
4013 case 'a':
4014 allowaltscreen = false;
4015 break;
4016 case 'c':
4017 opt_class = EARGF(usage());
4018 break;
4019 case 'e':
4020 if(argc > 1)
4021 --argc, ++argv;
4022 goto run;
4023 case 'f':
4024 opt_font = EARGF(usage());
4025 break;
4026 case 'g':
4027 xw.gm = XParseGeometry(EARGF(usage()),
4028 &xw.l, &xw.t, &cols, &rows);
4029 break;
4030 case 'i':
4031 xw.isfixed = True;
4032 break;
4033 case 'o':
4034 opt_io = EARGF(usage());
4035 break;
4036 case 'l':
4037 opt_line = EARGF(usage());
4038 break;
4039 case 't':
4040 opt_title = EARGF(usage());
4041 break;
4042 case 'w':
4043 opt_embed = EARGF(usage());
4044 break;
4045 case 'v':
4046 default:
4047 usage();
4048 } ARGEND;
4049
4050 run:
4051 if(argc > 0) {
4052 /* eat all remaining arguments */
4053 opt_cmd = argv;
4054 if(!opt_title && !opt_line)
4055 opt_title = basename(xstrdup(argv[0]));
4056 }
4057 setlocale(LC_CTYPE, "");
4058 XSetLocaleModifiers("");
4059 tnew(MAX(cols, 1), MAX(rows, 1));
4060 xinit();
4061 selinit();
4062 run();
4063
4064 return 0;
4065 }
4066