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Add Mod + Shift + c/v and no selclear.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <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 LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
76 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
77 #define IS_SET(flag) ((term.mode & (flag)) != 0)
78 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
79 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
80
81 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
82 #define IS_TRUECOL(x) (1 << 24 & (x))
83 #define TRUERED(x) (((x) & 0xff0000) >> 8)
84 #define TRUEGREEN(x) (((x) & 0xff00))
85 #define TRUEBLUE(x) (((x) & 0xff) << 8)
86
87
88 enum glyph_attribute {
89 ATTR_NULL = 0,
90 ATTR_BOLD = 1 << 0,
91 ATTR_FAINT = 1 << 1,
92 ATTR_ITALIC = 1 << 2,
93 ATTR_UNDERLINE = 1 << 3,
94 ATTR_BLINK = 1 << 4,
95 ATTR_REVERSE = 1 << 5,
96 ATTR_INVISIBLE = 1 << 6,
97 ATTR_STRUCK = 1 << 7,
98 ATTR_WRAP = 1 << 8,
99 ATTR_WIDE = 1 << 9,
100 ATTR_WDUMMY = 1 << 10,
101 };
102
103 enum cursor_movement {
104 CURSOR_SAVE,
105 CURSOR_LOAD
106 };
107
108 enum cursor_state {
109 CURSOR_DEFAULT = 0,
110 CURSOR_WRAPNEXT = 1,
111 CURSOR_ORIGIN = 2
112 };
113
114 enum term_mode {
115 MODE_WRAP = 1 << 0,
116 MODE_INSERT = 1 << 1,
117 MODE_APPKEYPAD = 1 << 2,
118 MODE_ALTSCREEN = 1 << 3,
119 MODE_CRLF = 1 << 4,
120 MODE_MOUSEBTN = 1 << 5,
121 MODE_MOUSEMOTION = 1 << 6,
122 MODE_REVERSE = 1 << 7,
123 MODE_KBDLOCK = 1 << 8,
124 MODE_HIDE = 1 << 9,
125 MODE_ECHO = 1 << 10,
126 MODE_APPCURSOR = 1 << 11,
127 MODE_MOUSESGR = 1 << 12,
128 MODE_8BIT = 1 << 13,
129 MODE_BLINK = 1 << 14,
130 MODE_FBLINK = 1 << 15,
131 MODE_FOCUS = 1 << 16,
132 MODE_MOUSEX10 = 1 << 17,
133 MODE_MOUSEMANY = 1 << 18,
134 MODE_BRCKTPASTE = 1 << 19,
135 MODE_PRINT = 1 << 20,
136 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
137 |MODE_MOUSEMANY,
138 };
139
140 enum charset {
141 CS_GRAPHIC0,
142 CS_GRAPHIC1,
143 CS_UK,
144 CS_USA,
145 CS_MULTI,
146 CS_GER,
147 CS_FIN
148 };
149
150 enum escape_state {
151 ESC_START = 1,
152 ESC_CSI = 2,
153 ESC_STR = 4, /* DCS, OSC, PM, APC */
154 ESC_ALTCHARSET = 8,
155 ESC_STR_END = 16, /* a final string was encountered */
156 ESC_TEST = 32, /* Enter in test mode */
157 };
158
159 enum window_state {
160 WIN_VISIBLE = 1,
161 WIN_REDRAW = 2,
162 WIN_FOCUSED = 4
163 };
164
165 enum selection_type {
166 SEL_REGULAR = 1,
167 SEL_RECTANGULAR = 2
168 };
169
170 enum selection_snap {
171 SNAP_WORD = 1,
172 SNAP_LINE = 2
173 };
174
175 typedef unsigned char uchar;
176 typedef unsigned int uint;
177 typedef unsigned long ulong;
178 typedef unsigned short ushort;
179
180 typedef XftDraw *Draw;
181 typedef XftColor Color;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode;
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colormap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int l, t; /* left and top offset */
254 int gm; /* geometry mask */
255 int tw, th; /* tty width and height */
256 int w, h; /* window width and height */
257 int ch; /* char height */
258 int cw; /* char width */
259 char state; /* focus, redraw, visible */
260 } XWindow;
261
262 typedef struct {
263 uint b;
264 uint mask;
265 char *s;
266 } Mousekey;
267
268 typedef struct {
269 KeySym k;
270 uint mask;
271 char *s;
272 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
273 signed char appkey; /* application keypad */
274 signed char appcursor; /* application cursor */
275 signed char crlf; /* crlf mode */
276 } Key;
277
278 typedef struct {
279 int mode;
280 int type;
281 int snap;
282 /*
283 * Selection variables:
284 * nb – normalized coordinates of the beginning of the selection
285 * ne – normalized coordinates of the end of the selection
286 * ob – original coordinates of the beginning of the selection
287 * oe – original coordinates of the end of the selection
288 */
289 struct {
290 int x, y;
291 } nb, ne, ob, oe;
292
293 char *primary, *clipboard;
294 Atom xtarget;
295 bool alt;
296 struct timespec tclick1;
297 struct timespec tclick2;
298 } Selection;
299
300 typedef union {
301 int i;
302 uint ui;
303 float f;
304 const void *v;
305 } Arg;
306
307 typedef struct {
308 uint mod;
309 KeySym keysym;
310 void (*func)(const Arg *);
311 const Arg arg;
312 } Shortcut;
313
314 /* function definitions used in config.h */
315 static void clipcopy(const Arg *);
316 static void clippaste(const Arg *);
317 static void numlock(const Arg *);
318 static void selpaste(const Arg *);
319 static void xzoom(const Arg *);
320 static void xzoomabs(const Arg *);
321 static void xzoomreset(const Arg *);
322 static void printsel(const Arg *);
323 static void printscreen(const Arg *) ;
324 static void toggleprinter(const Arg *);
325
326 /* Config.h for applying patches and the configuration. */
327 #include "config.h"
328
329 /* Font structure */
330 typedef struct {
331 int height;
332 int width;
333 int ascent;
334 int descent;
335 short lbearing;
336 short rbearing;
337 XftFont *match;
338 FcFontSet *set;
339 FcPattern *pattern;
340 } Font;
341
342 /* Drawing Context */
343 typedef struct {
344 Color col[MAX(LEN(colorname), 256)];
345 Font font, bfont, ifont, ibfont;
346 GC gc;
347 } DC;
348
349 static void die(const char *, ...);
350 static void draw(void);
351 static void redraw(void);
352 static void drawregion(int, int, int, int);
353 static void execsh(void);
354 static void sigchld(int);
355 static void run(void);
356
357 static void csidump(void);
358 static void csihandle(void);
359 static void csiparse(void);
360 static void csireset(void);
361 static int eschandle(uchar ascii);
362 static void strdump(void);
363 static void strhandle(void);
364 static void strparse(void);
365 static void strreset(void);
366
367 static int tattrset(int);
368 static void tprinter(char *, size_t);
369 static void tdumpsel(void);
370 static void tdumpline(int);
371 static void tdump(void);
372 static void tclearregion(int, int, int, int);
373 static void tcursor(int);
374 static void tdeletechar(int);
375 static void tdeleteline(int);
376 static void tinsertblank(int);
377 static void tinsertblankline(int);
378 static int tlinelen(int);
379 static void tmoveto(int, int);
380 static void tmoveato(int, int);
381 static void tnew(int, int);
382 static void tnewline(int);
383 static void tputtab(int);
384 static void tputc(char *, int);
385 static void treset(void);
386 static void tresize(int, int);
387 static void tscrollup(int, int);
388 static void tscrolldown(int, int);
389 static void tsetattr(int *, int);
390 static void tsetchar(char *, Glyph *, int, int);
391 static void tsetscroll(int, int);
392 static void tswapscreen(void);
393 static void tsetdirt(int, int);
394 static void tsetdirtattr(int);
395 static void tsetmode(bool, bool, int *, int);
396 static void tfulldirt(void);
397 static void techo(char *, int);
398 static void tcontrolcode(uchar );
399 static void tdectest(char );
400 static int32_t tdefcolor(int *, int *, int);
401 static void tdeftran(char);
402 static inline bool match(uint, uint);
403 static void ttynew(void);
404 static void ttyread(void);
405 static void ttyresize(void);
406 static void ttysend(char *, size_t);
407 static void ttywrite(const char *, size_t);
408 static void tstrsequence(uchar c);
409
410 static void xdraws(char *, Glyph, int, int, int, int);
411 static void xhints(void);
412 static void xclear(int, int, int, int);
413 static void xdrawcursor(void);
414 static void xinit(void);
415 static void xloadcols(void);
416 static int xsetcolorname(int, const char *);
417 static int xgeommasktogravity(int);
418 static int xloadfont(Font *, FcPattern *);
419 static void xloadfonts(char *, double);
420 static int xloadfontset(Font *);
421 static void xsettitle(char *);
422 static void xresettitle(void);
423 static void xsetpointermotion(int);
424 static void xseturgency(int);
425 static void xsetsel(char *);
426 static void xtermclear(int, int, int, int);
427 static void xunloadfont(Font *);
428 static void xunloadfonts(void);
429 static void xresize(int, int);
430
431 static void expose(XEvent *);
432 static void visibility(XEvent *);
433 static void unmap(XEvent *);
434 static char *kmap(KeySym, uint);
435 static void kpress(XEvent *);
436 static void cmessage(XEvent *);
437 static void cresize(int, int);
438 static void resize(XEvent *);
439 static void focus(XEvent *);
440 static void brelease(XEvent *);
441 static void bpress(XEvent *);
442 static void bmotion(XEvent *);
443 static void selnotify(XEvent *);
444 static void selclear(XEvent *);
445 static void selrequest(XEvent *);
446
447 static void selinit(void);
448 static void selnormalize(void);
449 static inline bool selected(int, int);
450 static char *getsel(void);
451 static void selcopy(void);
452 static void selscroll(int, int);
453 static void selsnap(int, int *, int *, int);
454 static void getbuttoninfo(XEvent *);
455 static void mousereport(XEvent *);
456
457 static size_t utf8decode(char *, long *, size_t);
458 static long utf8decodebyte(char, size_t *);
459 static size_t utf8encode(long, char *, size_t);
460 static char utf8encodebyte(long, size_t);
461 static size_t utf8len(char *);
462 static size_t utf8validate(long *, size_t);
463
464 static ssize_t xwrite(int, const char *, size_t);
465 static void *xmalloc(size_t);
466 static void *xrealloc(void *, size_t);
467 static char *xstrdup(char *);
468
469 static void usage(void);
470
471 static void (*handler[LASTEvent])(XEvent *) = {
472 [KeyPress] = kpress,
473 [ClientMessage] = cmessage,
474 [ConfigureNotify] = resize,
475 [VisibilityNotify] = visibility,
476 [UnmapNotify] = unmap,
477 [Expose] = expose,
478 [FocusIn] = focus,
479 [FocusOut] = focus,
480 [MotionNotify] = bmotion,
481 [ButtonPress] = bpress,
482 [ButtonRelease] = brelease,
483 /*
484 * Uncomment if you want the selection to disappear when you select something
485 * different in another window.
486 */
487 /* [SelectionClear] = selclear, */
488 [SelectionNotify] = selnotify,
489 [SelectionRequest] = selrequest,
490 };
491
492 /* Globals */
493 static DC dc;
494 static XWindow xw;
495 static Term term;
496 static CSIEscape csiescseq;
497 static STREscape strescseq;
498 static int cmdfd;
499 static pid_t pid;
500 static Selection sel;
501 static int iofd = STDOUT_FILENO;
502 static char **opt_cmd = NULL;
503 static char *opt_io = NULL;
504 static char *opt_title = NULL;
505 static char *opt_embed = NULL;
506 static char *opt_class = NULL;
507 static char *opt_font = NULL;
508 static int oldbutton = 3; /* button event on startup: 3 = release */
509
510 static char *usedfont = NULL;
511 static double usedfontsize = 0;
512 static double defaultfontsize = 0;
513
514 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
515 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
516 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
517 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
518
519 /* Font Ring Cache */
520 enum {
521 FRC_NORMAL,
522 FRC_ITALIC,
523 FRC_BOLD,
524 FRC_ITALICBOLD
525 };
526
527 typedef struct {
528 XftFont *font;
529 int flags;
530 long unicodep;
531 } Fontcache;
532
533 /* Fontcache is an array now. A new font will be appended to the array. */
534 static Fontcache frc[16];
535 static int frclen = 0;
536
537 ssize_t
538 xwrite(int fd, const char *s, size_t len) {
539 size_t aux = len;
540
541 while(len > 0) {
542 ssize_t r = write(fd, s, len);
543 if(r < 0)
544 return r;
545 len -= r;
546 s += r;
547 }
548 return aux;
549 }
550
551 void *
552 xmalloc(size_t len) {
553 void *p = malloc(len);
554
555 if(!p)
556 die("Out of memory\n");
557
558 return p;
559 }
560
561 void *
562 xrealloc(void *p, size_t len) {
563 if((p = realloc(p, len)) == NULL)
564 die("Out of memory\n");
565
566 return p;
567 }
568
569 char *
570 xstrdup(char *s) {
571 if((s = strdup(s)) == NULL)
572 die("Out of memory\n");
573
574 return s;
575 }
576
577 size_t
578 utf8decode(char *c, long *u, size_t clen) {
579 size_t i, j, len, type;
580 long udecoded;
581
582 *u = UTF_INVALID;
583 if(!clen)
584 return 0;
585 udecoded = utf8decodebyte(c[0], &len);
586 if(!BETWEEN(len, 1, UTF_SIZ))
587 return 1;
588 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
589 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
590 if(type != 0)
591 return j;
592 }
593 if(j < len)
594 return 0;
595 *u = udecoded;
596 utf8validate(u, len);
597 return len;
598 }
599
600 long
601 utf8decodebyte(char c, size_t *i) {
602 for(*i = 0; *i < LEN(utfmask); ++(*i))
603 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
604 return (uchar)c & ~utfmask[*i];
605 return 0;
606 }
607
608 size_t
609 utf8encode(long u, char *c, size_t clen) {
610 size_t len, i;
611
612 len = utf8validate(&u, 0);
613 if(clen < len)
614 return 0;
615 for(i = len - 1; i != 0; --i) {
616 c[i] = utf8encodebyte(u, 0);
617 u >>= 6;
618 }
619 c[0] = utf8encodebyte(u, len);
620 return len;
621 }
622
623 char
624 utf8encodebyte(long u, size_t i) {
625 return utfbyte[i] | (u & ~utfmask[i]);
626 }
627
628 size_t
629 utf8len(char *c) {
630 return utf8decode(c, &(long){0}, UTF_SIZ);
631 }
632
633 size_t
634 utf8validate(long *u, size_t i) {
635 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
636 *u = UTF_INVALID;
637 for(i = 1; *u > utfmax[i]; ++i)
638 ;
639 return i;
640 }
641
642 static void
643 selinit(void) {
644 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
645 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
646 sel.mode = 0;
647 sel.ob.x = -1;
648 sel.primary = NULL;
649 sel.clipboard = NULL;
650 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
651 if(sel.xtarget == None)
652 sel.xtarget = XA_STRING;
653 }
654
655 static int
656 x2col(int x) {
657 x -= borderpx;
658 x /= xw.cw;
659
660 return LIMIT(x, 0, term.col-1);
661 }
662
663 static int
664 y2row(int y) {
665 y -= borderpx;
666 y /= xw.ch;
667
668 return LIMIT(y, 0, term.row-1);
669 }
670
671 static int tlinelen(int y) {
672 int i = term.col;
673
674 if(term.line[y][i - 1].mode & ATTR_WRAP)
675 return i;
676
677 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
678 --i;
679
680 return i;
681 }
682
683 static void
684 selnormalize(void) {
685 int i;
686
687 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
688 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
689 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
690 } else {
691 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
692 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
693 }
694 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
695 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
696
697 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
698 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
699
700 /* expand selection over line breaks */
701 if (sel.type == SEL_RECTANGULAR)
702 return;
703 i = tlinelen(sel.nb.y);
704 if (i < sel.nb.x)
705 sel.nb.x = i;
706 if (tlinelen(sel.ne.y) <= sel.ne.x)
707 sel.ne.x = term.col - 1;
708 }
709
710 static inline bool
711 selected(int x, int y) {
712 if(sel.type == SEL_RECTANGULAR)
713 return BETWEEN(y, sel.nb.y, sel.ne.y)
714 && BETWEEN(x, sel.nb.x, sel.ne.x);
715
716 return BETWEEN(y, sel.nb.y, sel.ne.y)
717 && (y != sel.nb.y || x >= sel.nb.x)
718 && (y != sel.ne.y || x <= sel.ne.x);
719 }
720
721 void
722 selsnap(int mode, int *x, int *y, int direction) {
723 int newx, newy, xt, yt;
724 bool delim, prevdelim;
725 Glyph *gp, *prevgp;
726
727 switch(mode) {
728 case SNAP_WORD:
729 /*
730 * Snap around if the word wraps around at the end or
731 * beginning of a line.
732 */
733 prevgp = &term.line[*y][*x];
734 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
735 for(;;) {
736 newx = *x + direction;
737 newy = *y;
738 if(!BETWEEN(newx, 0, term.col - 1)) {
739 newy += direction;
740 newx = (newx + term.col) % term.col;
741 if (!BETWEEN(newy, 0, term.row - 1))
742 break;
743
744 if(direction > 0)
745 yt = *y, xt = *x;
746 else
747 yt = newy, xt = newx;
748 if(!(term.line[yt][xt].mode & ATTR_WRAP))
749 break;
750 }
751
752 if (newx >= tlinelen(newy))
753 break;
754
755 gp = &term.line[newy][newx];
756 delim = strchr(worddelimiters, gp->c[0]) != NULL;
757 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
758 || (delim && gp->c[0] != prevgp->c[0])))
759 break;
760
761 *x = newx;
762 *y = newy;
763 prevgp = gp;
764 prevdelim = delim;
765 }
766 break;
767 case SNAP_LINE:
768 /*
769 * Snap around if the the previous line or the current one
770 * has set ATTR_WRAP at its end. Then the whole next or
771 * previous line will be selected.
772 */
773 *x = (direction < 0) ? 0 : term.col - 1;
774 if(direction < 0 && *y > 0) {
775 for(; *y > 0; *y += direction) {
776 if(!(term.line[*y-1][term.col-1].mode
777 & ATTR_WRAP)) {
778 break;
779 }
780 }
781 } else if(direction > 0 && *y < term.row-1) {
782 for(; *y < term.row; *y += direction) {
783 if(!(term.line[*y][term.col-1].mode
784 & ATTR_WRAP)) {
785 break;
786 }
787 }
788 }
789 break;
790 }
791 }
792
793 void
794 getbuttoninfo(XEvent *e) {
795 int type;
796 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
797
798 sel.alt = IS_SET(MODE_ALTSCREEN);
799
800 sel.oe.x = x2col(e->xbutton.x);
801 sel.oe.y = y2row(e->xbutton.y);
802 selnormalize();
803
804 sel.type = SEL_REGULAR;
805 for(type = 1; type < LEN(selmasks); ++type) {
806 if(match(selmasks[type], state)) {
807 sel.type = type;
808 break;
809 }
810 }
811 }
812
813 void
814 mousereport(XEvent *e) {
815 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
816 button = e->xbutton.button, state = e->xbutton.state,
817 len;
818 char buf[40];
819 static int ox, oy;
820
821 /* from urxvt */
822 if(e->xbutton.type == MotionNotify) {
823 if(x == ox && y == oy)
824 return;
825 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
826 return;
827 /* MOUSE_MOTION: no reporting if no button is pressed */
828 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
829 return;
830
831 button = oldbutton + 32;
832 ox = x;
833 oy = y;
834 } else {
835 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
836 button = 3;
837 } else {
838 button -= Button1;
839 if(button >= 3)
840 button += 64 - 3;
841 }
842 if(e->xbutton.type == ButtonPress) {
843 oldbutton = button;
844 ox = x;
845 oy = y;
846 } else if(e->xbutton.type == ButtonRelease) {
847 oldbutton = 3;
848 /* MODE_MOUSEX10: no button release reporting */
849 if(IS_SET(MODE_MOUSEX10))
850 return;
851 if (button == 64 || button == 65)
852 return;
853 }
854 }
855
856 if(!IS_SET(MODE_MOUSEX10)) {
857 button += (state & ShiftMask ? 4 : 0)
858 + (state & Mod4Mask ? 8 : 0)
859 + (state & ControlMask ? 16 : 0);
860 }
861
862 len = 0;
863 if(IS_SET(MODE_MOUSESGR)) {
864 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
865 button, x+1, y+1,
866 e->xbutton.type == ButtonRelease ? 'm' : 'M');
867 } else if(x < 223 && y < 223) {
868 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
869 32+button, 32+x+1, 32+y+1);
870 } else {
871 return;
872 }
873
874 ttywrite(buf, len);
875 }
876
877 void
878 bpress(XEvent *e) {
879 struct timespec now;
880 Mousekey *mk;
881
882 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
883 mousereport(e);
884 return;
885 }
886
887 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
888 if(e->xbutton.button == mk->b
889 && match(mk->mask, e->xbutton.state)) {
890 ttysend(mk->s, strlen(mk->s));
891 return;
892 }
893 }
894
895 if(e->xbutton.button == Button1) {
896 clock_gettime(CLOCK_MONOTONIC, &now);
897
898 /* Clear previous selection, logically and visually. */
899 selclear(NULL);
900 sel.mode = 1;
901 sel.type = SEL_REGULAR;
902 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
903 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
904
905 /*
906 * If the user clicks below predefined timeouts specific
907 * snapping behaviour is exposed.
908 */
909 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
910 sel.snap = SNAP_LINE;
911 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
912 sel.snap = SNAP_WORD;
913 } else {
914 sel.snap = 0;
915 }
916 selnormalize();
917
918 /*
919 * Draw selection, unless it's regular and we don't want to
920 * make clicks visible
921 */
922 if(sel.snap != 0) {
923 sel.mode++;
924 tsetdirt(sel.nb.y, sel.ne.y);
925 }
926 sel.tclick2 = sel.tclick1;
927 sel.tclick1 = now;
928 }
929 }
930
931 char *
932 getsel(void) {
933 char *str, *ptr;
934 int y, bufsize, size, lastx, linelen;
935 Glyph *gp, *last;
936
937 if(sel.ob.x == -1)
938 return NULL;
939
940 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
941 ptr = str = xmalloc(bufsize);
942
943 /* append every set & selected glyph to the selection */
944 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
945 linelen = tlinelen(y);
946
947 if(sel.type == SEL_RECTANGULAR) {
948 gp = &term.line[y][sel.nb.x];
949 lastx = sel.ne.x;
950 } else {
951 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
952 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
953 }
954 last = &term.line[y][MIN(lastx, linelen-1)];
955 while(last >= gp && last->c[0] == ' ')
956 --last;
957
958 for( ; gp <= last; ++gp) {
959 if(gp->mode & ATTR_WDUMMY)
960 continue;
961
962 size = utf8len(gp->c);
963 memcpy(ptr, gp->c, size);
964 ptr += size;
965 }
966
967 /*
968 * Copy and pasting of line endings is inconsistent
969 * in the inconsistent terminal and GUI world.
970 * The best solution seems like to produce '\n' when
971 * something is copied from st and convert '\n' to
972 * '\r', when something to be pasted is received by
973 * st.
974 * FIXME: Fix the computer world.
975 */
976 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
977 *ptr++ = '\n';
978 }
979 *ptr = 0;
980 return str;
981 }
982
983 void
984 selcopy(void) {
985 xsetsel(getsel());
986 }
987
988 void
989 selnotify(XEvent *e) {
990 ulong nitems, ofs, rem;
991 int format;
992 uchar *data, *last, *repl;
993 Atom type;
994 XSelectionEvent *xsev;
995
996 ofs = 0;
997 xsev = (XSelectionEvent *)e;
998 do {
999 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1000 BUFSIZ/4, False, AnyPropertyType,
1001 &type, &format, &nitems, &rem,
1002 &data)) {
1003 fprintf(stderr, "Clipboard allocation failed\n");
1004 return;
1005 }
1006
1007 /*
1008 * As seen in getsel:
1009 * Line endings are inconsistent in the terminal and GUI world
1010 * copy and pasting. When receiving some selection data,
1011 * replace all '\n' with '\r'.
1012 * FIXME: Fix the computer world.
1013 */
1014 repl = data;
1015 last = data + nitems * format / 8;
1016 while((repl = memchr(repl, '\n', last - repl))) {
1017 *repl++ = '\r';
1018 }
1019
1020 if(IS_SET(MODE_BRCKTPASTE))
1021 ttywrite("\033[200~", 6);
1022 ttysend((char *)data, nitems * format / 8);
1023 if(IS_SET(MODE_BRCKTPASTE))
1024 ttywrite("\033[201~", 6);
1025 XFree(data);
1026 /* number of 32-bit chunks returned */
1027 ofs += nitems * format / 32;
1028 } while(rem > 0);
1029 }
1030
1031 void
1032 selpaste(const Arg *dummy) {
1033 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1034 xw.win, CurrentTime);
1035 }
1036
1037 void
1038 clipcopy(const Arg *dummy) {
1039 Atom clipboard;
1040
1041 if(sel.clipboard != NULL)
1042 free(sel.clipboard);
1043
1044 if(sel.primary != NULL) {
1045 sel.clipboard = xstrdup(sel.primary);
1046 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1047 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1048 }
1049 }
1050
1051 void
1052 clippaste(const Arg *dummy) {
1053 Atom clipboard;
1054
1055 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1056 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1057 xw.win, CurrentTime);
1058 }
1059
1060 void
1061 selclear(XEvent *e) {
1062 if(sel.ob.x == -1)
1063 return;
1064 sel.ob.x = -1;
1065 tsetdirt(sel.nb.y, sel.ne.y);
1066 }
1067
1068 void
1069 selrequest(XEvent *e) {
1070 XSelectionRequestEvent *xsre;
1071 XSelectionEvent xev;
1072 Atom xa_targets, string, clipboard;
1073 char *seltext;
1074
1075 xsre = (XSelectionRequestEvent *) e;
1076 xev.type = SelectionNotify;
1077 xev.requestor = xsre->requestor;
1078 xev.selection = xsre->selection;
1079 xev.target = xsre->target;
1080 xev.time = xsre->time;
1081 /* reject */
1082 xev.property = None;
1083
1084 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1085 if(xsre->target == xa_targets) {
1086 /* respond with the supported type */
1087 string = sel.xtarget;
1088 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1089 XA_ATOM, 32, PropModeReplace,
1090 (uchar *) &string, 1);
1091 xev.property = xsre->property;
1092 } else if(xsre->target == sel.xtarget) {
1093 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1094 if(xsre->selection == XA_PRIMARY) {
1095 seltext = sel.primary;
1096 } else if(xsre->selection == clipboard) {
1097 seltext = sel.clipboard;
1098 } else {
1099 fprintf(stderr,
1100 "Unhandled clipboard selection 0x%lx\n",
1101 xsre->selection);
1102 return;
1103 }
1104 if(seltext != NULL) {
1105 XChangeProperty(xsre->display, xsre->requestor,
1106 xsre->property, xsre->target,
1107 8, PropModeReplace,
1108 (uchar *)seltext, strlen(seltext));
1109 xev.property = xsre->property;
1110 }
1111 }
1112
1113 /* all done, send a notification to the listener */
1114 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1115 fprintf(stderr, "Error sending SelectionNotify event\n");
1116 }
1117
1118 void
1119 xsetsel(char *str) {
1120 free(sel.primary);
1121 sel.primary = str;
1122
1123 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1124 }
1125
1126 void
1127 brelease(XEvent *e) {
1128 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1129 mousereport(e);
1130 return;
1131 }
1132
1133 if(e->xbutton.button == Button2) {
1134 selpaste(NULL);
1135 } else if(e->xbutton.button == Button1) {
1136 if(sel.mode < 2) {
1137 selclear(NULL);
1138 } else {
1139 getbuttoninfo(e);
1140 selcopy();
1141 }
1142 sel.mode = 0;
1143 tsetdirt(sel.nb.y, sel.ne.y);
1144 }
1145 }
1146
1147 void
1148 bmotion(XEvent *e) {
1149 int oldey, oldex, oldsby, oldsey;
1150
1151 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1152 mousereport(e);
1153 return;
1154 }
1155
1156 if(!sel.mode)
1157 return;
1158
1159 sel.mode++;
1160 oldey = sel.oe.y;
1161 oldex = sel.oe.x;
1162 oldsby = sel.nb.y;
1163 oldsey = sel.ne.y;
1164 getbuttoninfo(e);
1165
1166 if(oldey != sel.oe.y || oldex != sel.oe.x)
1167 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1168 }
1169
1170 void
1171 die(const char *errstr, ...) {
1172 va_list ap;
1173
1174 va_start(ap, errstr);
1175 vfprintf(stderr, errstr, ap);
1176 va_end(ap);
1177 exit(EXIT_FAILURE);
1178 }
1179
1180 void
1181 execsh(void) {
1182 char **args, *sh, *prog;
1183 const struct passwd *pw;
1184 char buf[sizeof(long) * 8 + 1];
1185
1186 errno = 0;
1187 if((pw = getpwuid(getuid())) == NULL) {
1188 if(errno)
1189 die("getpwuid:%s\n", strerror(errno));
1190 else
1191 die("who are you?\n");
1192 }
1193
1194 if (!(sh = getenv("SHELL"))) {
1195 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1196 }
1197
1198 if(opt_cmd)
1199 prog = opt_cmd[0];
1200 else if(utmp)
1201 prog = utmp;
1202 else
1203 prog = sh;
1204 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1205
1206 snprintf(buf, sizeof(buf), "%lu", xw.win);
1207
1208 unsetenv("COLUMNS");
1209 unsetenv("LINES");
1210 unsetenv("TERMCAP");
1211 setenv("LOGNAME", pw->pw_name, 1);
1212 setenv("USER", pw->pw_name, 1);
1213 setenv("SHELL", sh, 1);
1214 setenv("HOME", pw->pw_dir, 1);
1215 setenv("TERM", termname, 1);
1216 setenv("WINDOWID", buf, 1);
1217
1218 signal(SIGCHLD, SIG_DFL);
1219 signal(SIGHUP, SIG_DFL);
1220 signal(SIGINT, SIG_DFL);
1221 signal(SIGQUIT, SIG_DFL);
1222 signal(SIGTERM, SIG_DFL);
1223 signal(SIGALRM, SIG_DFL);
1224
1225 execvp(prog, args);
1226 _exit(EXIT_FAILURE);
1227 }
1228
1229 void
1230 sigchld(int a) {
1231 int stat, ret;
1232
1233 if(waitpid(pid, &stat, 0) < 0)
1234 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1235
1236 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1237 if (ret != EXIT_SUCCESS)
1238 die("child finished with error '%d'\n", stat);
1239 exit(EXIT_SUCCESS);
1240 }
1241
1242 void
1243 ttynew(void) {
1244 int m, s;
1245 struct winsize w = {term.row, term.col, 0, 0};
1246
1247 /* seems to work fine on linux, openbsd and freebsd */
1248 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1249 die("openpty failed: %s\n", strerror(errno));
1250
1251 switch(pid = fork()) {
1252 case -1:
1253 die("fork failed\n");
1254 break;
1255 case 0:
1256 setsid(); /* create a new process group */
1257 dup2(s, STDIN_FILENO);
1258 dup2(s, STDOUT_FILENO);
1259 dup2(s, STDERR_FILENO);
1260 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1261 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1262 close(s);
1263 close(m);
1264 execsh();
1265 break;
1266 default:
1267 close(s);
1268 cmdfd = m;
1269 signal(SIGCHLD, sigchld);
1270 if(opt_io) {
1271 term.mode |= MODE_PRINT;
1272 iofd = (!strcmp(opt_io, "-")) ?
1273 STDOUT_FILENO :
1274 open(opt_io, O_WRONLY | O_CREAT, 0666);
1275 if(iofd < 0) {
1276 fprintf(stderr, "Error opening %s:%s\n",
1277 opt_io, strerror(errno));
1278 }
1279 }
1280 break;
1281 }
1282 }
1283
1284 void
1285 ttyread(void) {
1286 static char buf[BUFSIZ];
1287 static int buflen = 0;
1288 char *ptr;
1289 char s[UTF_SIZ];
1290 int charsize; /* size of utf8 char in bytes */
1291 long unicodep;
1292 int ret;
1293
1294 /* append read bytes to unprocessed bytes */
1295 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1296 die("Couldn't read from shell: %s\n", strerror(errno));
1297
1298 /* process every complete utf8 char */
1299 buflen += ret;
1300 ptr = buf;
1301 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1302 utf8encode(unicodep, s, UTF_SIZ);
1303 tputc(s, charsize);
1304 ptr += charsize;
1305 buflen -= charsize;
1306 }
1307
1308 /* keep any uncomplete utf8 char for the next call */
1309 memmove(buf, ptr, buflen);
1310 }
1311
1312 void
1313 ttywrite(const char *s, size_t n) {
1314 if(xwrite(cmdfd, s, n) == -1)
1315 die("write error on tty: %s\n", strerror(errno));
1316 }
1317
1318 void
1319 ttysend(char *s, size_t n) {
1320 ttywrite(s, n);
1321 if(IS_SET(MODE_ECHO))
1322 techo(s, n);
1323 }
1324
1325 void
1326 ttyresize(void) {
1327 struct winsize w;
1328
1329 w.ws_row = term.row;
1330 w.ws_col = term.col;
1331 w.ws_xpixel = xw.tw;
1332 w.ws_ypixel = xw.th;
1333 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1334 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1335 }
1336
1337 int
1338 tattrset(int attr) {
1339 int i, j;
1340
1341 for(i = 0; i < term.row-1; i++) {
1342 for(j = 0; j < term.col-1; j++) {
1343 if(term.line[i][j].mode & attr)
1344 return 1;
1345 }
1346 }
1347
1348 return 0;
1349 }
1350
1351 void
1352 tsetdirt(int top, int bot) {
1353 int i;
1354
1355 LIMIT(top, 0, term.row-1);
1356 LIMIT(bot, 0, term.row-1);
1357
1358 for(i = top; i <= bot; i++)
1359 term.dirty[i] = 1;
1360 }
1361
1362 void
1363 tsetdirtattr(int attr) {
1364 int i, j;
1365
1366 for(i = 0; i < term.row-1; i++) {
1367 for(j = 0; j < term.col-1; j++) {
1368 if(term.line[i][j].mode & attr) {
1369 tsetdirt(i, i);
1370 break;
1371 }
1372 }
1373 }
1374 }
1375
1376 void
1377 tfulldirt(void) {
1378 tsetdirt(0, term.row-1);
1379 }
1380
1381 void
1382 tcursor(int mode) {
1383 static TCursor c[2];
1384 bool alt = IS_SET(MODE_ALTSCREEN);
1385
1386 if(mode == CURSOR_SAVE) {
1387 c[alt] = term.c;
1388 } else if(mode == CURSOR_LOAD) {
1389 term.c = c[alt];
1390 tmoveto(c[alt].x, c[alt].y);
1391 }
1392 }
1393
1394 void
1395 treset(void) {
1396 uint i;
1397
1398 term.c = (TCursor){{
1399 .mode = ATTR_NULL,
1400 .fg = defaultfg,
1401 .bg = defaultbg
1402 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1403
1404 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1405 for(i = tabspaces; i < term.col; i += tabspaces)
1406 term.tabs[i] = 1;
1407 term.top = 0;
1408 term.bot = term.row - 1;
1409 term.mode = MODE_WRAP;
1410 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1411 term.charset = 0;
1412
1413 for(i = 0; i < 2; i++) {
1414 tmoveto(0, 0);
1415 tcursor(CURSOR_SAVE);
1416 tclearregion(0, 0, term.col-1, term.row-1);
1417 tswapscreen();
1418 }
1419 }
1420
1421 void
1422 tnew(int col, int row) {
1423 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1424 tresize(col, row);
1425 term.numlock = 1;
1426
1427 treset();
1428 }
1429
1430 void
1431 tswapscreen(void) {
1432 Line *tmp = term.line;
1433
1434 term.line = term.alt;
1435 term.alt = tmp;
1436 term.mode ^= MODE_ALTSCREEN;
1437 tfulldirt();
1438 }
1439
1440 void
1441 tscrolldown(int orig, int n) {
1442 int i;
1443 Line temp;
1444
1445 LIMIT(n, 0, term.bot-orig+1);
1446
1447 tsetdirt(orig, term.bot-n);
1448 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1449
1450 for(i = term.bot; i >= orig+n; i--) {
1451 temp = term.line[i];
1452 term.line[i] = term.line[i-n];
1453 term.line[i-n] = temp;
1454 }
1455
1456 selscroll(orig, n);
1457 }
1458
1459 void
1460 tscrollup(int orig, int n) {
1461 int i;
1462 Line temp;
1463
1464 LIMIT(n, 0, term.bot-orig+1);
1465
1466 tclearregion(0, orig, term.col-1, orig+n-1);
1467 tsetdirt(orig+n, term.bot);
1468
1469 for(i = orig; i <= term.bot-n; i++) {
1470 temp = term.line[i];
1471 term.line[i] = term.line[i+n];
1472 term.line[i+n] = temp;
1473 }
1474
1475 selscroll(orig, -n);
1476 }
1477
1478 void
1479 selscroll(int orig, int n) {
1480 if(sel.ob.x == -1)
1481 return;
1482
1483 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1484 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1485 selclear(NULL);
1486 return;
1487 }
1488 if(sel.type == SEL_RECTANGULAR) {
1489 if(sel.ob.y < term.top)
1490 sel.ob.y = term.top;
1491 if(sel.oe.y > term.bot)
1492 sel.oe.y = term.bot;
1493 } else {
1494 if(sel.ob.y < term.top) {
1495 sel.ob.y = term.top;
1496 sel.ob.x = 0;
1497 }
1498 if(sel.oe.y > term.bot) {
1499 sel.oe.y = term.bot;
1500 sel.oe.x = term.col;
1501 }
1502 }
1503 selnormalize();
1504 }
1505 }
1506
1507 void
1508 tnewline(int first_col) {
1509 int y = term.c.y;
1510
1511 if(y == term.bot) {
1512 tscrollup(term.top, 1);
1513 } else {
1514 y++;
1515 }
1516 tmoveto(first_col ? 0 : term.c.x, y);
1517 }
1518
1519 void
1520 csiparse(void) {
1521 char *p = csiescseq.buf, *np;
1522 long int v;
1523
1524 csiescseq.narg = 0;
1525 if(*p == '?') {
1526 csiescseq.priv = 1;
1527 p++;
1528 }
1529
1530 csiescseq.buf[csiescseq.len] = '\0';
1531 while(p < csiescseq.buf+csiescseq.len) {
1532 np = NULL;
1533 v = strtol(p, &np, 10);
1534 if(np == p)
1535 v = 0;
1536 if(v == LONG_MAX || v == LONG_MIN)
1537 v = -1;
1538 csiescseq.arg[csiescseq.narg++] = v;
1539 p = np;
1540 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1541 break;
1542 p++;
1543 }
1544 csiescseq.mode = *p;
1545 }
1546
1547 /* for absolute user moves, when decom is set */
1548 void
1549 tmoveato(int x, int y) {
1550 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1551 }
1552
1553 void
1554 tmoveto(int x, int y) {
1555 int miny, maxy;
1556
1557 if(term.c.state & CURSOR_ORIGIN) {
1558 miny = term.top;
1559 maxy = term.bot;
1560 } else {
1561 miny = 0;
1562 maxy = term.row - 1;
1563 }
1564 LIMIT(x, 0, term.col-1);
1565 LIMIT(y, miny, maxy);
1566 term.c.state &= ~CURSOR_WRAPNEXT;
1567 term.c.x = x;
1568 term.c.y = y;
1569 }
1570
1571 void
1572 tsetchar(char *c, Glyph *attr, int x, int y) {
1573 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1574 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1575 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1576 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1577 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1578 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1579 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1580 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1581 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1582 };
1583
1584 /*
1585 * The table is proudly stolen from rxvt.
1586 */
1587 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1588 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1589 c = vt100_0[c[0] - 0x41];
1590 }
1591 }
1592
1593 if(term.line[y][x].mode & ATTR_WIDE) {
1594 if(x+1 < term.col) {
1595 term.line[y][x+1].c[0] = ' ';
1596 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1597 }
1598 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1599 term.line[y][x-1].c[0] = ' ';
1600 term.line[y][x-1].mode &= ~ATTR_WIDE;
1601 }
1602
1603 term.dirty[y] = 1;
1604 term.line[y][x] = *attr;
1605 memcpy(term.line[y][x].c, c, UTF_SIZ);
1606 }
1607
1608 void
1609 tclearregion(int x1, int y1, int x2, int y2) {
1610 int x, y, temp;
1611 Glyph *gp;
1612
1613 if(x1 > x2)
1614 temp = x1, x1 = x2, x2 = temp;
1615 if(y1 > y2)
1616 temp = y1, y1 = y2, y2 = temp;
1617
1618 LIMIT(x1, 0, term.col-1);
1619 LIMIT(x2, 0, term.col-1);
1620 LIMIT(y1, 0, term.row-1);
1621 LIMIT(y2, 0, term.row-1);
1622
1623 for(y = y1; y <= y2; y++) {
1624 term.dirty[y] = 1;
1625 for(x = x1; x <= x2; x++) {
1626 gp = &term.line[y][x];
1627 if(selected(x, y))
1628 selclear(NULL);
1629 gp->fg = term.c.attr.fg;
1630 gp->bg = term.c.attr.bg;
1631 gp->mode = 0;
1632 memcpy(gp->c, " ", 2);
1633 }
1634 }
1635 }
1636
1637 void
1638 tdeletechar(int n) {
1639 int dst, src, size;
1640 Glyph *line;
1641
1642 LIMIT(n, 0, term.col - term.c.x);
1643
1644 dst = term.c.x;
1645 src = term.c.x + n;
1646 size = term.col - src;
1647 line = term.line[term.c.y];
1648
1649 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1650 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1651 }
1652
1653 void
1654 tinsertblank(int n) {
1655 int dst, src, size;
1656 Glyph *line;
1657
1658 LIMIT(n, 0, term.col - term.c.x);
1659
1660 dst = term.c.x + n;
1661 src = term.c.x;
1662 size = term.col - dst;
1663 line = term.line[term.c.y];
1664
1665 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1666 tclearregion(src, term.c.y, dst - 1, term.c.y);
1667 }
1668
1669 void
1670 tinsertblankline(int n) {
1671 if(BETWEEN(term.c.y, term.top, term.bot))
1672 tscrolldown(term.c.y, n);
1673 }
1674
1675 void
1676 tdeleteline(int n) {
1677 if(BETWEEN(term.c.y, term.top, term.bot))
1678 tscrollup(term.c.y, n);
1679 }
1680
1681 int32_t
1682 tdefcolor(int *attr, int *npar, int l) {
1683 int32_t idx = -1;
1684 uint r, g, b;
1685
1686 switch (attr[*npar + 1]) {
1687 case 2: /* direct color in RGB space */
1688 if (*npar + 4 >= l) {
1689 fprintf(stderr,
1690 "erresc(38): Incorrect number of parameters (%d)\n",
1691 *npar);
1692 break;
1693 }
1694 r = attr[*npar + 2];
1695 g = attr[*npar + 3];
1696 b = attr[*npar + 4];
1697 *npar += 4;
1698 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1699 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1700 r, g, b);
1701 else
1702 idx = TRUECOLOR(r, g, b);
1703 break;
1704 case 5: /* indexed color */
1705 if (*npar + 2 >= l) {
1706 fprintf(stderr,
1707 "erresc(38): Incorrect number of parameters (%d)\n",
1708 *npar);
1709 break;
1710 }
1711 *npar += 2;
1712 if(!BETWEEN(attr[*npar], 0, 255))
1713 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1714 else
1715 idx = attr[*npar];
1716 break;
1717 case 0: /* implemented defined (only foreground) */
1718 case 1: /* transparent */
1719 case 3: /* direct color in CMY space */
1720 case 4: /* direct color in CMYK space */
1721 default:
1722 fprintf(stderr,
1723 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1724 break;
1725 }
1726
1727 return idx;
1728 }
1729
1730 void
1731 tsetattr(int *attr, int l) {
1732 int i;
1733 int32_t idx;
1734
1735 for(i = 0; i < l; i++) {
1736 switch(attr[i]) {
1737 case 0:
1738 term.c.attr.mode &= ~(
1739 ATTR_BOLD |
1740 ATTR_FAINT |
1741 ATTR_ITALIC |
1742 ATTR_UNDERLINE |
1743 ATTR_BLINK |
1744 ATTR_REVERSE |
1745 ATTR_INVISIBLE |
1746 ATTR_STRUCK );
1747 term.c.attr.fg = defaultfg;
1748 term.c.attr.bg = defaultbg;
1749 break;
1750 case 1:
1751 term.c.attr.mode |= ATTR_BOLD;
1752 break;
1753 case 2:
1754 term.c.attr.mode |= ATTR_FAINT;
1755 break;
1756 case 3:
1757 term.c.attr.mode |= ATTR_ITALIC;
1758 break;
1759 case 4:
1760 term.c.attr.mode |= ATTR_UNDERLINE;
1761 break;
1762 case 5: /* slow blink */
1763 /* FALLTHROUGH */
1764 case 6: /* rapid blink */
1765 term.c.attr.mode |= ATTR_BLINK;
1766 break;
1767 case 7:
1768 term.c.attr.mode |= ATTR_REVERSE;
1769 break;
1770 case 8:
1771 term.c.attr.mode |= ATTR_INVISIBLE;
1772 break;
1773 case 9:
1774 term.c.attr.mode |= ATTR_STRUCK;
1775 break;
1776 case 22:
1777 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1778 break;
1779 case 23:
1780 term.c.attr.mode &= ~ATTR_ITALIC;
1781 break;
1782 case 24:
1783 term.c.attr.mode &= ~ATTR_UNDERLINE;
1784 break;
1785 case 25:
1786 term.c.attr.mode &= ~ATTR_BLINK;
1787 break;
1788 case 27:
1789 term.c.attr.mode &= ~ATTR_REVERSE;
1790 break;
1791 case 28:
1792 term.c.attr.mode &= ~ATTR_INVISIBLE;
1793 break;
1794 case 29:
1795 term.c.attr.mode &= ~ATTR_STRUCK;
1796 break;
1797 case 38:
1798 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1799 term.c.attr.fg = idx;
1800 break;
1801 case 39:
1802 term.c.attr.fg = defaultfg;
1803 break;
1804 case 48:
1805 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1806 term.c.attr.bg = idx;
1807 break;
1808 case 49:
1809 term.c.attr.bg = defaultbg;
1810 break;
1811 default:
1812 if(BETWEEN(attr[i], 30, 37)) {
1813 term.c.attr.fg = attr[i] - 30;
1814 } else if(BETWEEN(attr[i], 40, 47)) {
1815 term.c.attr.bg = attr[i] - 40;
1816 } else if(BETWEEN(attr[i], 90, 97)) {
1817 term.c.attr.fg = attr[i] - 90 + 8;
1818 } else if(BETWEEN(attr[i], 100, 107)) {
1819 term.c.attr.bg = attr[i] - 100 + 8;
1820 } else {
1821 fprintf(stderr,
1822 "erresc(default): gfx attr %d unknown\n",
1823 attr[i]), csidump();
1824 }
1825 break;
1826 }
1827 }
1828 }
1829
1830 void
1831 tsetscroll(int t, int b) {
1832 int temp;
1833
1834 LIMIT(t, 0, term.row-1);
1835 LIMIT(b, 0, term.row-1);
1836 if(t > b) {
1837 temp = t;
1838 t = b;
1839 b = temp;
1840 }
1841 term.top = t;
1842 term.bot = b;
1843 }
1844
1845 void
1846 tsetmode(bool priv, bool set, int *args, int narg) {
1847 int *lim, mode;
1848 bool alt;
1849
1850 for(lim = args + narg; args < lim; ++args) {
1851 if(priv) {
1852 switch(*args) {
1853 case 1: /* DECCKM -- Cursor key */
1854 MODBIT(term.mode, set, MODE_APPCURSOR);
1855 break;
1856 case 5: /* DECSCNM -- Reverse video */
1857 mode = term.mode;
1858 MODBIT(term.mode, set, MODE_REVERSE);
1859 if(mode != term.mode)
1860 redraw();
1861 break;
1862 case 6: /* DECOM -- Origin */
1863 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1864 tmoveato(0, 0);
1865 break;
1866 case 7: /* DECAWM -- Auto wrap */
1867 MODBIT(term.mode, set, MODE_WRAP);
1868 break;
1869 case 0: /* Error (IGNORED) */
1870 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1871 case 3: /* DECCOLM -- Column (IGNORED) */
1872 case 4: /* DECSCLM -- Scroll (IGNORED) */
1873 case 8: /* DECARM -- Auto repeat (IGNORED) */
1874 case 18: /* DECPFF -- Printer feed (IGNORED) */
1875 case 19: /* DECPEX -- Printer extent (IGNORED) */
1876 case 42: /* DECNRCM -- National characters (IGNORED) */
1877 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1878 break;
1879 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1880 MODBIT(term.mode, !set, MODE_HIDE);
1881 break;
1882 case 9: /* X10 mouse compatibility mode */
1883 xsetpointermotion(0);
1884 MODBIT(term.mode, 0, MODE_MOUSE);
1885 MODBIT(term.mode, set, MODE_MOUSEX10);
1886 break;
1887 case 1000: /* 1000: report button press */
1888 xsetpointermotion(0);
1889 MODBIT(term.mode, 0, MODE_MOUSE);
1890 MODBIT(term.mode, set, MODE_MOUSEBTN);
1891 break;
1892 case 1002: /* 1002: report motion on button press */
1893 xsetpointermotion(0);
1894 MODBIT(term.mode, 0, MODE_MOUSE);
1895 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1896 break;
1897 case 1003: /* 1003: enable all mouse motions */
1898 xsetpointermotion(set);
1899 MODBIT(term.mode, 0, MODE_MOUSE);
1900 MODBIT(term.mode, set, MODE_MOUSEMANY);
1901 break;
1902 case 1004: /* 1004: send focus events to tty */
1903 MODBIT(term.mode, set, MODE_FOCUS);
1904 break;
1905 case 1006: /* 1006: extended reporting mode */
1906 MODBIT(term.mode, set, MODE_MOUSESGR);
1907 break;
1908 case 1034:
1909 MODBIT(term.mode, set, MODE_8BIT);
1910 break;
1911 case 1049: /* swap screen & set/restore cursor as xterm */
1912 if (!allowaltscreen)
1913 break;
1914 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1915 /* FALLTHROUGH */
1916 case 47: /* swap screen */
1917 case 1047:
1918 if (!allowaltscreen)
1919 break;
1920 alt = IS_SET(MODE_ALTSCREEN);
1921 if(alt) {
1922 tclearregion(0, 0, term.col-1,
1923 term.row-1);
1924 }
1925 if(set ^ alt) /* set is always 1 or 0 */
1926 tswapscreen();
1927 if(*args != 1049)
1928 break;
1929 /* FALLTHROUGH */
1930 case 1048:
1931 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1932 break;
1933 case 2004: /* 2004: bracketed paste mode */
1934 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1935 break;
1936 /* Not implemented mouse modes. See comments there. */
1937 case 1001: /* mouse highlight mode; can hang the
1938 terminal by design when implemented. */
1939 case 1005: /* UTF-8 mouse mode; will confuse
1940 applications not supporting UTF-8
1941 and luit. */
1942 case 1015: /* urxvt mangled mouse mode; incompatible
1943 and can be mistaken for other control
1944 codes. */
1945 default:
1946 fprintf(stderr,
1947 "erresc: unknown private set/reset mode %d\n",
1948 *args);
1949 break;
1950 }
1951 } else {
1952 switch(*args) {
1953 case 0: /* Error (IGNORED) */
1954 break;
1955 case 2: /* KAM -- keyboard action */
1956 MODBIT(term.mode, set, MODE_KBDLOCK);
1957 break;
1958 case 4: /* IRM -- Insertion-replacement */
1959 MODBIT(term.mode, set, MODE_INSERT);
1960 break;
1961 case 12: /* SRM -- Send/Receive */
1962 MODBIT(term.mode, !set, MODE_ECHO);
1963 break;
1964 case 20: /* LNM -- Linefeed/new line */
1965 MODBIT(term.mode, set, MODE_CRLF);
1966 break;
1967 default:
1968 fprintf(stderr,
1969 "erresc: unknown set/reset mode %d\n",
1970 *args);
1971 break;
1972 }
1973 }
1974 }
1975 }
1976
1977 void
1978 csihandle(void) {
1979 char buf[40];
1980 int len;
1981
1982 switch(csiescseq.mode) {
1983 default:
1984 unknown:
1985 fprintf(stderr, "erresc: unknown csi ");
1986 csidump();
1987 /* die(""); */
1988 break;
1989 case '@': /* ICH -- Insert <n> blank char */
1990 DEFAULT(csiescseq.arg[0], 1);
1991 tinsertblank(csiescseq.arg[0]);
1992 break;
1993 case 'A': /* CUU -- Cursor <n> Up */
1994 DEFAULT(csiescseq.arg[0], 1);
1995 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1996 break;
1997 case 'B': /* CUD -- Cursor <n> Down */
1998 case 'e': /* VPR --Cursor <n> Down */
1999 DEFAULT(csiescseq.arg[0], 1);
2000 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2001 break;
2002 case 'i': /* MC -- Media Copy */
2003 switch(csiescseq.arg[0]) {
2004 case 0:
2005 tdump();
2006 break;
2007 case 1:
2008 tdumpline(term.c.y);
2009 break;
2010 case 2:
2011 tdumpsel();
2012 break;
2013 case 4:
2014 term.mode &= ~MODE_PRINT;
2015 break;
2016 case 5:
2017 term.mode |= MODE_PRINT;
2018 break;
2019 }
2020 break;
2021 case 'c': /* DA -- Device Attributes */
2022 if(csiescseq.arg[0] == 0)
2023 ttywrite(vtiden, sizeof(vtiden) - 1);
2024 break;
2025 case 'C': /* CUF -- Cursor <n> Forward */
2026 case 'a': /* HPR -- Cursor <n> Forward */
2027 DEFAULT(csiescseq.arg[0], 1);
2028 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2029 break;
2030 case 'D': /* CUB -- Cursor <n> Backward */
2031 DEFAULT(csiescseq.arg[0], 1);
2032 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2033 break;
2034 case 'E': /* CNL -- Cursor <n> Down and first col */
2035 DEFAULT(csiescseq.arg[0], 1);
2036 tmoveto(0, term.c.y+csiescseq.arg[0]);
2037 break;
2038 case 'F': /* CPL -- Cursor <n> Up and first col */
2039 DEFAULT(csiescseq.arg[0], 1);
2040 tmoveto(0, term.c.y-csiescseq.arg[0]);
2041 break;
2042 case 'g': /* TBC -- Tabulation clear */
2043 switch(csiescseq.arg[0]) {
2044 case 0: /* clear current tab stop */
2045 term.tabs[term.c.x] = 0;
2046 break;
2047 case 3: /* clear all the tabs */
2048 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2049 break;
2050 default:
2051 goto unknown;
2052 }
2053 break;
2054 case 'G': /* CHA -- Move to <col> */
2055 case '`': /* HPA */
2056 DEFAULT(csiescseq.arg[0], 1);
2057 tmoveto(csiescseq.arg[0]-1, term.c.y);
2058 break;
2059 case 'H': /* CUP -- Move to <row> <col> */
2060 case 'f': /* HVP */
2061 DEFAULT(csiescseq.arg[0], 1);
2062 DEFAULT(csiescseq.arg[1], 1);
2063 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2064 break;
2065 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2066 DEFAULT(csiescseq.arg[0], 1);
2067 tputtab(csiescseq.arg[0]);
2068 break;
2069 case 'J': /* ED -- Clear screen */
2070 selclear(NULL);
2071 switch(csiescseq.arg[0]) {
2072 case 0: /* below */
2073 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2074 if(term.c.y < term.row-1) {
2075 tclearregion(0, term.c.y+1, term.col-1,
2076 term.row-1);
2077 }
2078 break;
2079 case 1: /* above */
2080 if(term.c.y > 1)
2081 tclearregion(0, 0, term.col-1, term.c.y-1);
2082 tclearregion(0, term.c.y, term.c.x, term.c.y);
2083 break;
2084 case 2: /* all */
2085 tclearregion(0, 0, term.col-1, term.row-1);
2086 break;
2087 default:
2088 goto unknown;
2089 }
2090 break;
2091 case 'K': /* EL -- Clear line */
2092 switch(csiescseq.arg[0]) {
2093 case 0: /* right */
2094 tclearregion(term.c.x, term.c.y, term.col-1,
2095 term.c.y);
2096 break;
2097 case 1: /* left */
2098 tclearregion(0, term.c.y, term.c.x, term.c.y);
2099 break;
2100 case 2: /* all */
2101 tclearregion(0, term.c.y, term.col-1, term.c.y);
2102 break;
2103 }
2104 break;
2105 case 'S': /* SU -- Scroll <n> line up */
2106 DEFAULT(csiescseq.arg[0], 1);
2107 tscrollup(term.top, csiescseq.arg[0]);
2108 break;
2109 case 'T': /* SD -- Scroll <n> line down */
2110 DEFAULT(csiescseq.arg[0], 1);
2111 tscrolldown(term.top, csiescseq.arg[0]);
2112 break;
2113 case 'L': /* IL -- Insert <n> blank lines */
2114 DEFAULT(csiescseq.arg[0], 1);
2115 tinsertblankline(csiescseq.arg[0]);
2116 break;
2117 case 'l': /* RM -- Reset Mode */
2118 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2119 break;
2120 case 'M': /* DL -- Delete <n> lines */
2121 DEFAULT(csiescseq.arg[0], 1);
2122 tdeleteline(csiescseq.arg[0]);
2123 break;
2124 case 'X': /* ECH -- Erase <n> char */
2125 DEFAULT(csiescseq.arg[0], 1);
2126 tclearregion(term.c.x, term.c.y,
2127 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2128 break;
2129 case 'P': /* DCH -- Delete <n> char */
2130 DEFAULT(csiescseq.arg[0], 1);
2131 tdeletechar(csiescseq.arg[0]);
2132 break;
2133 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2134 DEFAULT(csiescseq.arg[0], 1);
2135 tputtab(-csiescseq.arg[0]);
2136 break;
2137 case 'd': /* VPA -- Move to <row> */
2138 DEFAULT(csiescseq.arg[0], 1);
2139 tmoveato(term.c.x, csiescseq.arg[0]-1);
2140 break;
2141 case 'h': /* SM -- Set terminal mode */
2142 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2143 break;
2144 case 'm': /* SGR -- Terminal attribute (color) */
2145 tsetattr(csiescseq.arg, csiescseq.narg);
2146 break;
2147 case 'n': /* DSR – Device Status Report (cursor position) */
2148 if (csiescseq.arg[0] == 6) {
2149 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2150 term.c.y+1, term.c.x+1);
2151 ttywrite(buf, len);
2152 }
2153 break;
2154 case 'r': /* DECSTBM -- Set Scrolling Region */
2155 if(csiescseq.priv) {
2156 goto unknown;
2157 } else {
2158 DEFAULT(csiescseq.arg[0], 1);
2159 DEFAULT(csiescseq.arg[1], term.row);
2160 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2161 tmoveato(0, 0);
2162 }
2163 break;
2164 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2165 tcursor(CURSOR_SAVE);
2166 break;
2167 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2168 tcursor(CURSOR_LOAD);
2169 break;
2170 }
2171 }
2172
2173 void
2174 csidump(void) {
2175 int i;
2176 uint c;
2177
2178 printf("ESC[");
2179 for(i = 0; i < csiescseq.len; i++) {
2180 c = csiescseq.buf[i] & 0xff;
2181 if(isprint(c)) {
2182 putchar(c);
2183 } else if(c == '\n') {
2184 printf("(\\n)");
2185 } else if(c == '\r') {
2186 printf("(\\r)");
2187 } else if(c == 0x1b) {
2188 printf("(\\e)");
2189 } else {
2190 printf("(%02x)", c);
2191 }
2192 }
2193 putchar('\n');
2194 }
2195
2196 void
2197 csireset(void) {
2198 memset(&csiescseq, 0, sizeof(csiescseq));
2199 }
2200
2201 void
2202 strhandle(void) {
2203 char *p = NULL;
2204 int j, narg, par;
2205
2206 term.esc &= ~(ESC_STR_END|ESC_STR);
2207 strparse();
2208 narg = strescseq.narg;
2209 par = atoi(strescseq.args[0]);
2210
2211 switch(strescseq.type) {
2212 case ']': /* OSC -- Operating System Command */
2213 switch(par) {
2214 case 0:
2215 case 1:
2216 case 2:
2217 if(narg > 1)
2218 xsettitle(strescseq.args[1]);
2219 return;
2220 case 4: /* color set */
2221 if(narg < 3)
2222 break;
2223 p = strescseq.args[2];
2224 /* FALLTHROUGH */
2225 case 104: /* color reset, here p = NULL */
2226 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2227 if(xsetcolorname(j, p)) {
2228 fprintf(stderr, "erresc: invalid color %s\n", p);
2229 } else {
2230 /*
2231 * TODO if defaultbg color is changed, borders
2232 * are dirty
2233 */
2234 redraw();
2235 }
2236 return;
2237 }
2238 break;
2239 case 'k': /* old title set compatibility */
2240 xsettitle(strescseq.args[0]);
2241 return;
2242 case 'P': /* DCS -- Device Control String */
2243 case '_': /* APC -- Application Program Command */
2244 case '^': /* PM -- Privacy Message */
2245 return;
2246 }
2247
2248 fprintf(stderr, "erresc: unknown str ");
2249 strdump();
2250 }
2251
2252 void
2253 strparse(void) {
2254 char *p = strescseq.buf;
2255
2256 strescseq.narg = 0;
2257 strescseq.buf[strescseq.len] = '\0';
2258 while(p && strescseq.narg < STR_ARG_SIZ)
2259 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2260 }
2261
2262 void
2263 strdump(void) {
2264 int i;
2265 uint c;
2266
2267 printf("ESC%c", strescseq.type);
2268 for(i = 0; i < strescseq.len; i++) {
2269 c = strescseq.buf[i] & 0xff;
2270 if(c == '\0') {
2271 return;
2272 } else if(isprint(c)) {
2273 putchar(c);
2274 } else if(c == '\n') {
2275 printf("(\\n)");
2276 } else if(c == '\r') {
2277 printf("(\\r)");
2278 } else if(c == 0x1b) {
2279 printf("(\\e)");
2280 } else {
2281 printf("(%02x)", c);
2282 }
2283 }
2284 printf("ESC\\\n");
2285 }
2286
2287 void
2288 strreset(void) {
2289 memset(&strescseq, 0, sizeof(strescseq));
2290 }
2291
2292 void
2293 tprinter(char *s, size_t len) {
2294 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2295 fprintf(stderr, "Error writing in %s:%s\n",
2296 opt_io, strerror(errno));
2297 close(iofd);
2298 iofd = -1;
2299 }
2300 }
2301
2302 void
2303 toggleprinter(const Arg *arg) {
2304 term.mode ^= MODE_PRINT;
2305 }
2306
2307 void
2308 printscreen(const Arg *arg) {
2309 tdump();
2310 }
2311
2312 void
2313 printsel(const Arg *arg) {
2314 tdumpsel();
2315 }
2316
2317 void
2318 tdumpsel(void) {
2319 char *ptr;
2320
2321 if((ptr = getsel())) {
2322 tprinter(ptr, strlen(ptr));
2323 free(ptr);
2324 }
2325 }
2326
2327 void
2328 tdumpline(int n) {
2329 Glyph *bp, *end;
2330
2331 bp = &term.line[n][0];
2332 end = &bp[MIN(tlinelen(n), term.col) - 1];
2333 if(bp != end || bp->c[0] != ' ') {
2334 for( ;bp <= end; ++bp)
2335 tprinter(bp->c, utf8len(bp->c));
2336 }
2337 tprinter("\n", 1);
2338 }
2339
2340 void
2341 tdump(void) {
2342 int i;
2343
2344 for(i = 0; i < term.row; ++i)
2345 tdumpline(i);
2346 }
2347
2348 void
2349 tputtab(int n) {
2350 uint x = term.c.x;
2351
2352 if(n > 0) {
2353 while(x < term.col && n--)
2354 for(++x; x < term.col && !term.tabs[x]; ++x)
2355 /* nothing */ ;
2356 } else if(n < 0) {
2357 while(x > 0 && n++)
2358 for(--x; x > 0 && !term.tabs[x]; --x)
2359 /* nothing */ ;
2360 }
2361 tmoveto(x, term.c.y);
2362 }
2363
2364 void
2365 techo(char *buf, int len) {
2366 for(; len > 0; buf++, len--) {
2367 char c = *buf;
2368
2369 if(ISCONTROL((uchar) c)) { /* control code */
2370 if(c & 0x80) {
2371 c &= 0x7f;
2372 tputc("^", 1);
2373 tputc("[", 1);
2374 } else if(c != '\n' && c != '\r' && c != '\t') {
2375 c ^= 0x40;
2376 tputc("^", 1);
2377 }
2378 tputc(&c, 1);
2379 } else {
2380 break;
2381 }
2382 }
2383 if(len)
2384 tputc(buf, len);
2385 }
2386
2387 void
2388 tdeftran(char ascii) {
2389 static char cs[] = "0B";
2390 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2391 char *p;
2392
2393 if((p = strchr(cs, ascii)) == NULL) {
2394 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2395 } else {
2396 term.trantbl[term.icharset] = vcs[p - cs];
2397 }
2398 }
2399
2400 void
2401 tdectest(char c) {
2402 static char E[UTF_SIZ] = "E";
2403 int x, y;
2404
2405 if(c == '8') { /* DEC screen alignment test. */
2406 for(x = 0; x < term.col; ++x) {
2407 for(y = 0; y < term.row; ++y)
2408 tsetchar(E, &term.c.attr, x, y);
2409 }
2410 }
2411 }
2412
2413 void
2414 tstrsequence(uchar c) {
2415 if (c & 0x80) {
2416 switch (c) {
2417 case 0x90: /* DCS -- Device Control String */
2418 c = 'P';
2419 break;
2420 case 0x9f: /* APC -- Application Program Command */
2421 c = '_';
2422 break;
2423 case 0x9e: /* PM -- Privacy Message */
2424 c = '^';
2425 break;
2426 case 0x9d: /* OSC -- Operating System Command */
2427 c = ']';
2428 break;
2429 }
2430 }
2431 strreset();
2432 strescseq.type = c;
2433 term.esc |= ESC_STR;
2434 return;
2435 }
2436
2437 void
2438 tcontrolcode(uchar ascii) {
2439 static char question[UTF_SIZ] = "?";
2440
2441 switch(ascii) {
2442 case '\t': /* HT */
2443 tputtab(1);
2444 return;
2445 case '\b': /* BS */
2446 tmoveto(term.c.x-1, term.c.y);
2447 return;
2448 case '\r': /* CR */
2449 tmoveto(0, term.c.y);
2450 return;
2451 case '\f': /* LF */
2452 case '\v': /* VT */
2453 case '\n': /* LF */
2454 /* go to first col if the mode is set */
2455 tnewline(IS_SET(MODE_CRLF));
2456 return;
2457 case '\a': /* BEL */
2458 if(term.esc & ESC_STR_END) {
2459 /* backwards compatibility to xterm */
2460 strhandle();
2461 } else {
2462 if(!(xw.state & WIN_FOCUSED))
2463 xseturgency(1);
2464 if (bellvolume)
2465 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2466 }
2467 break;
2468 case '\033': /* ESC */
2469 csireset();
2470 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2471 term.esc |= ESC_START;
2472 return;
2473 case '\016': /* SO (LS1 -- Locking shift 1) */
2474 case '\017': /* SI (LS0 -- Locking shift 0) */
2475 term.charset = 1 - (ascii - '\016');
2476 return;
2477 case '\032': /* SUB */
2478 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2479 case '\030': /* CAN */
2480 csireset();
2481 break;
2482 case '\005': /* ENQ (IGNORED) */
2483 case '\000': /* NUL (IGNORED) */
2484 case '\021': /* XON (IGNORED) */
2485 case '\023': /* XOFF (IGNORED) */
2486 case 0177: /* DEL (IGNORED) */
2487 return;
2488 case 0x84: /* TODO: IND */
2489 break;
2490 case 0x85: /* NEL -- Next line */
2491 tnewline(1); /* always go to first col */
2492 break;
2493 case 0x88: /* HTS -- Horizontal tab stop */
2494 term.tabs[term.c.x] = 1;
2495 break;
2496 case 0x8d: /* TODO: RI */
2497 case 0x8e: /* TODO: SS2 */
2498 case 0x8f: /* TODO: SS3 */
2499 case 0x98: /* TODO: SOS */
2500 break;
2501 case 0x9a: /* DECID -- Identify Terminal */
2502 ttywrite(vtiden, sizeof(vtiden) - 1);
2503 break;
2504 case 0x9b: /* TODO: CSI */
2505 case 0x9c: /* TODO: ST */
2506 break;
2507 case 0x90: /* DCS -- Device Control String */
2508 case 0x9f: /* APC -- Application Program Command */
2509 case 0x9e: /* PM -- Privacy Message */
2510 case 0x9d: /* OSC -- Operating System Command */
2511 tstrsequence(ascii);
2512 return;
2513 }
2514 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2515 term.esc &= ~(ESC_STR_END|ESC_STR);
2516 return;
2517 }
2518
2519 /*
2520 * returns 1 when the sequence is finished and it hasn't to read
2521 * more characters for this sequence, otherwise 0
2522 */
2523 int
2524 eschandle(uchar ascii) {
2525 switch(ascii) {
2526 case '[':
2527 term.esc |= ESC_CSI;
2528 return 0;
2529 case '#':
2530 term.esc |= ESC_TEST;
2531 return 0;
2532 case 'P': /* DCS -- Device Control String */
2533 case '_': /* APC -- Application Program Command */
2534 case '^': /* PM -- Privacy Message */
2535 case ']': /* OSC -- Operating System Command */
2536 case 'k': /* old title set compatibility */
2537 tstrsequence(ascii);
2538 return 0;
2539 case 'n': /* LS2 -- Locking shift 2 */
2540 case 'o': /* LS3 -- Locking shift 3 */
2541 term.charset = 2 + (ascii - 'n');
2542 break;
2543 case '(': /* GZD4 -- set primary charset G0 */
2544 case ')': /* G1D4 -- set secondary charset G1 */
2545 case '*': /* G2D4 -- set tertiary charset G2 */
2546 case '+': /* G3D4 -- set quaternary charset G3 */
2547 term.icharset = ascii - '(';
2548 term.esc |= ESC_ALTCHARSET;
2549 return 0;
2550 case 'D': /* IND -- Linefeed */
2551 if(term.c.y == term.bot) {
2552 tscrollup(term.top, 1);
2553 } else {
2554 tmoveto(term.c.x, term.c.y+1);
2555 }
2556 break;
2557 case 'E': /* NEL -- Next line */
2558 tnewline(1); /* always go to first col */
2559 break;
2560 case 'H': /* HTS -- Horizontal tab stop */
2561 term.tabs[term.c.x] = 1;
2562 break;
2563 case 'M': /* RI -- Reverse index */
2564 if(term.c.y == term.top) {
2565 tscrolldown(term.top, 1);
2566 } else {
2567 tmoveto(term.c.x, term.c.y-1);
2568 }
2569 break;
2570 case 'Z': /* DECID -- Identify Terminal */
2571 ttywrite(vtiden, sizeof(vtiden) - 1);
2572 break;
2573 case 'c': /* RIS -- Reset to inital state */
2574 treset();
2575 xresettitle();
2576 xloadcols();
2577 break;
2578 case '=': /* DECPAM -- Application keypad */
2579 term.mode |= MODE_APPKEYPAD;
2580 break;
2581 case '>': /* DECPNM -- Normal keypad */
2582 term.mode &= ~MODE_APPKEYPAD;
2583 break;
2584 case '7': /* DECSC -- Save Cursor */
2585 tcursor(CURSOR_SAVE);
2586 break;
2587 case '8': /* DECRC -- Restore Cursor */
2588 tcursor(CURSOR_LOAD);
2589 break;
2590 case '\\': /* ST -- String Terminator */
2591 if(term.esc & ESC_STR_END)
2592 strhandle();
2593 break;
2594 default:
2595 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2596 (uchar) ascii, isprint(ascii)? ascii:'.');
2597 break;
2598 }
2599 return 1;
2600 }
2601
2602 void
2603 tputc(char *c, int len) {
2604 uchar ascii;
2605 bool control;
2606 long unicodep;
2607 int width;
2608 Glyph *gp;
2609
2610 if(len == 1) {
2611 width = 1;
2612 unicodep = ascii = *c;
2613 } else {
2614 utf8decode(c, &unicodep, UTF_SIZ);
2615 if ((width = wcwidth(unicodep)) == -1) {
2616 c = "\357\277\275"; /* UTF_INVALID */
2617 width = 1;
2618 }
2619 control = ISCONTROLC1(unicodep);
2620 ascii = unicodep;
2621 }
2622
2623 if(IS_SET(MODE_PRINT))
2624 tprinter(c, len);
2625 control = ISCONTROL(unicodep);
2626
2627 /*
2628 * STR sequence must be checked before anything else
2629 * because it uses all following characters until it
2630 * receives a ESC, a SUB, a ST or any other C1 control
2631 * character.
2632 */
2633 if(term.esc & ESC_STR) {
2634 if(width == 1 &&
2635 (ascii == '\a' || ascii == 030 ||
2636 ascii == 032 || ascii == 033 ||
2637 ISCONTROLC1(unicodep))) {
2638 term.esc &= ~(ESC_START|ESC_STR);
2639 term.esc |= ESC_STR_END;
2640 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2641 memmove(&strescseq.buf[strescseq.len], c, len);
2642 strescseq.len += len;
2643 return;
2644 } else {
2645 /*
2646 * Here is a bug in terminals. If the user never sends
2647 * some code to stop the str or esc command, then st
2648 * will stop responding. But this is better than
2649 * silently failing with unknown characters. At least
2650 * then users will report back.
2651 *
2652 * In the case users ever get fixed, here is the code:
2653 */
2654 /*
2655 * term.esc = 0;
2656 * strhandle();
2657 */
2658 return;
2659 }
2660 }
2661
2662 /*
2663 * Actions of control codes must be performed as soon they arrive
2664 * because they can be embedded inside a control sequence, and
2665 * they must not cause conflicts with sequences.
2666 */
2667 if(control) {
2668 tcontrolcode(ascii);
2669 /*
2670 * control codes are not shown ever
2671 */
2672 return;
2673 } else if(term.esc & ESC_START) {
2674 if(term.esc & ESC_CSI) {
2675 csiescseq.buf[csiescseq.len++] = ascii;
2676 if(BETWEEN(ascii, 0x40, 0x7E)
2677 || csiescseq.len >= \
2678 sizeof(csiescseq.buf)-1) {
2679 term.esc = 0;
2680 csiparse();
2681 csihandle();
2682 }
2683 return;
2684 } else if(term.esc & ESC_ALTCHARSET) {
2685 tdeftran(ascii);
2686 } else if(term.esc & ESC_TEST) {
2687 tdectest(ascii);
2688 } else {
2689 if (!eschandle(ascii))
2690 return;
2691 /* sequence already finished */
2692 }
2693 term.esc = 0;
2694 /*
2695 * All characters which form part of a sequence are not
2696 * printed
2697 */
2698 return;
2699 }
2700 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2701 selclear(NULL);
2702
2703 gp = &term.line[term.c.y][term.c.x];
2704 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2705 gp->mode |= ATTR_WRAP;
2706 tnewline(1);
2707 gp = &term.line[term.c.y][term.c.x];
2708 }
2709
2710 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2711 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2712
2713 if(term.c.x+width > term.col) {
2714 tnewline(1);
2715 gp = &term.line[term.c.y][term.c.x];
2716 }
2717
2718 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2719
2720 if(width == 2) {
2721 gp->mode |= ATTR_WIDE;
2722 if(term.c.x+1 < term.col) {
2723 gp[1].c[0] = '\0';
2724 gp[1].mode = ATTR_WDUMMY;
2725 }
2726 }
2727 if(term.c.x+width < term.col) {
2728 tmoveto(term.c.x+width, term.c.y);
2729 } else {
2730 term.c.state |= CURSOR_WRAPNEXT;
2731 }
2732 }
2733
2734 void
2735 tresize(int col, int row) {
2736 int i;
2737 int minrow = MIN(row, term.row);
2738 int mincol = MIN(col, term.col);
2739 int slide = term.c.y - row + 1;
2740 bool *bp;
2741 TCursor c;
2742
2743 if(col < 1 || row < 1) {
2744 fprintf(stderr,
2745 "tresize: error resizing to %dx%d\n", col, row);
2746 return;
2747 }
2748
2749 /* free unneeded rows */
2750 i = 0;
2751 if(slide > 0) {
2752 /*
2753 * slide screen to keep cursor where we expect it -
2754 * tscrollup would work here, but we can optimize to
2755 * memmove because we're freeing the earlier lines
2756 */
2757 for(/* i = 0 */; i < slide; i++) {
2758 free(term.line[i]);
2759 free(term.alt[i]);
2760 }
2761 memmove(term.line, term.line + slide, row * sizeof(Line));
2762 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2763 }
2764 for(i += row; i < term.row; i++) {
2765 free(term.line[i]);
2766 free(term.alt[i]);
2767 }
2768
2769 /* resize to new height */
2770 term.line = xrealloc(term.line, row * sizeof(Line));
2771 term.alt = xrealloc(term.alt, row * sizeof(Line));
2772 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2773 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2774
2775 /* resize each row to new width, zero-pad if needed */
2776 for(i = 0; i < minrow; i++) {
2777 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2778 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2779 }
2780
2781 /* allocate any new rows */
2782 for(/* i == minrow */; i < row; i++) {
2783 term.line[i] = xmalloc(col * sizeof(Glyph));
2784 term.alt[i] = xmalloc(col * sizeof(Glyph));
2785 }
2786 if(col > term.col) {
2787 bp = term.tabs + term.col;
2788
2789 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2790 while(--bp > term.tabs && !*bp)
2791 /* nothing */ ;
2792 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2793 *bp = 1;
2794 }
2795 /* update terminal size */
2796 term.col = col;
2797 term.row = row;
2798 /* reset scrolling region */
2799 tsetscroll(0, row-1);
2800 /* make use of the LIMIT in tmoveto */
2801 tmoveto(term.c.x, term.c.y);
2802 /* Clearing both screens (it makes dirty all lines) */
2803 c = term.c;
2804 for(i = 0; i < 2; i++) {
2805 if(mincol < col && 0 < minrow) {
2806 tclearregion(mincol, 0, col - 1, minrow - 1);
2807 }
2808 if(0 < col && minrow < row) {
2809 tclearregion(0, minrow, col - 1, row - 1);
2810 }
2811 tswapscreen();
2812 tcursor(CURSOR_LOAD);
2813 }
2814 term.c = c;
2815 }
2816
2817 void
2818 xresize(int col, int row) {
2819 xw.tw = MAX(1, col * xw.cw);
2820 xw.th = MAX(1, row * xw.ch);
2821
2822 XFreePixmap(xw.dpy, xw.buf);
2823 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2824 DefaultDepth(xw.dpy, xw.scr));
2825 XftDrawChange(xw.draw, xw.buf);
2826 xclear(0, 0, xw.w, xw.h);
2827 }
2828
2829 static inline ushort
2830 sixd_to_16bit(int x) {
2831 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2832 }
2833
2834 void
2835 xloadcols(void) {
2836 int i;
2837 XRenderColor color = { .alpha = 0xffff };
2838 static bool loaded;
2839 Color *cp;
2840
2841 if(loaded) {
2842 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2843 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2844 }
2845
2846 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2847 for(i = 0; i < LEN(colorname); i++) {
2848 if(!colorname[i])
2849 continue;
2850 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2851 die("Could not allocate color '%s'\n", colorname[i]);
2852 }
2853 }
2854
2855 /* load colors [16-231] ; same colors as xterm */
2856 for(i = 16; i < 6*6*6+16; i++) {
2857 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2858 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2859 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2860 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2861 die("Could not allocate color %d\n", i);
2862 }
2863
2864 /* load colors [232-255] ; grayscale */
2865 for(; i < 256; i++) {
2866 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2867 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2868 die("Could not allocate color %d\n", i);
2869 }
2870 loaded = true;
2871 }
2872
2873 int
2874 xsetcolorname(int x, const char *name) {
2875 XRenderColor color = { .alpha = 0xffff };
2876 Color ncolor;
2877
2878 if(!BETWEEN(x, 0, LEN(colorname)))
2879 return 1;
2880
2881 if(!name) {
2882 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2883 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2884 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2885 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2886 if(!XftColorAllocValue(xw.dpy, xw.vis,
2887 xw.cmap, &color, &ncolor)) {
2888 return 1;
2889 }
2890
2891 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2892 dc.col[x] = ncolor;
2893 return 0;
2894 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2895 color.red = color.green = color.blue = \
2896 0x0808 + 0x0a0a * (x - (16 + 216));
2897 if(!XftColorAllocValue(xw.dpy, xw.vis,
2898 xw.cmap, &color, &ncolor)) {
2899 return 1;
2900 }
2901
2902 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2903 dc.col[x] = ncolor;
2904 return 0;
2905 } else { /* system colors */
2906 name = colorname[x];
2907 }
2908 }
2909 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2910 return 1;
2911
2912 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2913 dc.col[x] = ncolor;
2914 return 0;
2915 }
2916
2917 void
2918 xtermclear(int col1, int row1, int col2, int row2) {
2919 XftDrawRect(xw.draw,
2920 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2921 borderpx + col1 * xw.cw,
2922 borderpx + row1 * xw.ch,
2923 (col2-col1+1) * xw.cw,
2924 (row2-row1+1) * xw.ch);
2925 }
2926
2927 /*
2928 * Absolute coordinates.
2929 */
2930 void
2931 xclear(int x1, int y1, int x2, int y2) {
2932 XftDrawRect(xw.draw,
2933 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2934 x1, y1, x2-x1, y2-y1);
2935 }
2936
2937 void
2938 xhints(void) {
2939 XClassHint class = {opt_class ? opt_class : termname, termname};
2940 XWMHints wm = {.flags = InputHint, .input = 1};
2941 XSizeHints *sizeh = NULL;
2942
2943 sizeh = XAllocSizeHints();
2944
2945 sizeh->flags = PSize | PResizeInc | PBaseSize;
2946 sizeh->height = xw.h;
2947 sizeh->width = xw.w;
2948 sizeh->height_inc = xw.ch;
2949 sizeh->width_inc = xw.cw;
2950 sizeh->base_height = 2 * borderpx;
2951 sizeh->base_width = 2 * borderpx;
2952 if(xw.isfixed == True) {
2953 sizeh->flags |= PMaxSize | PMinSize;
2954 sizeh->min_width = sizeh->max_width = xw.w;
2955 sizeh->min_height = sizeh->max_height = xw.h;
2956 }
2957 if(xw.gm & (XValue|YValue)) {
2958 sizeh->flags |= USPosition | PWinGravity;
2959 sizeh->x = xw.l;
2960 sizeh->y = xw.t;
2961 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2962 }
2963
2964 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2965 &class);
2966 XFree(sizeh);
2967 }
2968
2969 int
2970 xgeommasktogravity(int mask) {
2971 switch(mask & (XNegative|YNegative)) {
2972 case 0:
2973 return NorthWestGravity;
2974 case XNegative:
2975 return NorthEastGravity;
2976 case YNegative:
2977 return SouthWestGravity;
2978 }
2979 return SouthEastGravity;
2980 }
2981
2982 int
2983 xloadfont(Font *f, FcPattern *pattern) {
2984 FcPattern *match;
2985 FcResult result;
2986
2987 match = FcFontMatch(NULL, pattern, &result);
2988 if(!match)
2989 return 1;
2990
2991 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2992 FcPatternDestroy(match);
2993 return 1;
2994 }
2995
2996 f->set = NULL;
2997 f->pattern = FcPatternDuplicate(pattern);
2998
2999 f->ascent = f->match->ascent;
3000 f->descent = f->match->descent;
3001 f->lbearing = 0;
3002 f->rbearing = f->match->max_advance_width;
3003
3004 f->height = f->ascent + f->descent;
3005 f->width = f->lbearing + f->rbearing;
3006
3007 return 0;
3008 }
3009
3010 void
3011 xloadfonts(char *fontstr, double fontsize) {
3012 FcPattern *pattern;
3013 FcResult r_sz, r_psz;
3014 double fontval;
3015 float ceilf(float);
3016
3017 if(fontstr[0] == '-') {
3018 pattern = XftXlfdParse(fontstr, False, False);
3019 } else {
3020 pattern = FcNameParse((FcChar8 *)fontstr);
3021 }
3022
3023 if(!pattern)
3024 die("st: can't open font %s\n", fontstr);
3025
3026 if(fontsize > 1) {
3027 FcPatternDel(pattern, FC_PIXEL_SIZE);
3028 FcPatternDel(pattern, FC_SIZE);
3029 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3030 usedfontsize = fontsize;
3031 } else {
3032 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3033 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3034 if(r_psz == FcResultMatch) {
3035 usedfontsize = fontval;
3036 } else if(r_sz == FcResultMatch) {
3037 usedfontsize = -1;
3038 } else {
3039 /*
3040 * Default font size is 12, if none given. This is to
3041 * have a known usedfontsize value.
3042 */
3043 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3044 usedfontsize = 12;
3045 }
3046 defaultfontsize = usedfontsize;
3047 }
3048
3049 FcConfigSubstitute(0, pattern, FcMatchPattern);
3050 FcDefaultSubstitute(pattern);
3051
3052 if(xloadfont(&dc.font, pattern))
3053 die("st: can't open font %s\n", fontstr);
3054
3055 if(usedfontsize < 0) {
3056 FcPatternGetDouble(dc.font.match->pattern,
3057 FC_PIXEL_SIZE, 0, &fontval);
3058 usedfontsize = fontval;
3059 if(fontsize == 0)
3060 defaultfontsize = fontval;
3061 }
3062
3063 /* Setting character width and height. */
3064 xw.cw = ceilf(dc.font.width * cwscale);
3065 xw.ch = ceilf(dc.font.height * chscale);
3066
3067 FcPatternDel(pattern, FC_SLANT);
3068 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3069 if(xloadfont(&dc.ifont, pattern))
3070 die("st: can't open font %s\n", fontstr);
3071
3072 FcPatternDel(pattern, FC_WEIGHT);
3073 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3074 if(xloadfont(&dc.ibfont, pattern))
3075 die("st: can't open font %s\n", fontstr);
3076
3077 FcPatternDel(pattern, FC_SLANT);
3078 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3079 if(xloadfont(&dc.bfont, pattern))
3080 die("st: can't open font %s\n", fontstr);
3081
3082 FcPatternDestroy(pattern);
3083 }
3084
3085 int
3086 xloadfontset(Font *f) {
3087 FcResult result;
3088
3089 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3090 return 1;
3091 return 0;
3092 }
3093
3094 void
3095 xunloadfont(Font *f) {
3096 XftFontClose(xw.dpy, f->match);
3097 FcPatternDestroy(f->pattern);
3098 if(f->set)
3099 FcFontSetDestroy(f->set);
3100 }
3101
3102 void
3103 xunloadfonts(void) {
3104 /* Free the loaded fonts in the font cache. */
3105 while(frclen > 0)
3106 XftFontClose(xw.dpy, frc[--frclen].font);
3107
3108 xunloadfont(&dc.font);
3109 xunloadfont(&dc.bfont);
3110 xunloadfont(&dc.ifont);
3111 xunloadfont(&dc.ibfont);
3112 }
3113
3114 void
3115 xzoom(const Arg *arg) {
3116 Arg larg;
3117
3118 larg.i = usedfontsize + arg->i;
3119 xzoomabs(&larg);
3120 }
3121
3122 void
3123 xzoomabs(const Arg *arg) {
3124 xunloadfonts();
3125 xloadfonts(usedfont, arg->i);
3126 cresize(0, 0);
3127 redraw();
3128 xhints();
3129 }
3130
3131 void
3132 xzoomreset(const Arg *arg) {
3133 Arg larg;
3134
3135 if(defaultfontsize > 0) {
3136 larg.i = defaultfontsize;
3137 xzoomabs(&larg);
3138 }
3139 }
3140
3141 void
3142 xinit(void) {
3143 XGCValues gcvalues;
3144 Cursor cursor;
3145 Window parent;
3146 pid_t thispid = getpid();
3147
3148 if(!(xw.dpy = XOpenDisplay(NULL)))
3149 die("Can't open display\n");
3150 xw.scr = XDefaultScreen(xw.dpy);
3151 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3152
3153 /* font */
3154 if(!FcInit())
3155 die("Could not init fontconfig.\n");
3156
3157 usedfont = (opt_font == NULL)? font : opt_font;
3158 xloadfonts(usedfont, 0);
3159
3160 /* colors */
3161 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3162 xloadcols();
3163
3164 /* adjust fixed window geometry */
3165 xw.w = 2 * borderpx + term.col * xw.cw;
3166 xw.h = 2 * borderpx + term.row * xw.ch;
3167 if(xw.gm & XNegative)
3168 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3169 if(xw.gm & YNegative)
3170 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3171
3172 /* Events */
3173 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3174 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3175 xw.attrs.bit_gravity = NorthWestGravity;
3176 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3177 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3178 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3179 xw.attrs.colormap = xw.cmap;
3180
3181 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3182 parent = XRootWindow(xw.dpy, xw.scr);
3183 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3184 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3185 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3186 | CWEventMask | CWColormap, &xw.attrs);
3187
3188 memset(&gcvalues, 0, sizeof(gcvalues));
3189 gcvalues.graphics_exposures = False;
3190 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3191 &gcvalues);
3192 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3193 DefaultDepth(xw.dpy, xw.scr));
3194 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3195 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3196
3197 /* Xft rendering context */
3198 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3199
3200 /* input methods */
3201 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3202 XSetLocaleModifiers("@im=local");
3203 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3204 XSetLocaleModifiers("@im=");
3205 if((xw.xim = XOpenIM(xw.dpy,
3206 NULL, NULL, NULL)) == NULL) {
3207 die("XOpenIM failed. Could not open input"
3208 " device.\n");
3209 }
3210 }
3211 }
3212 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3213 | XIMStatusNothing, XNClientWindow, xw.win,
3214 XNFocusWindow, xw.win, NULL);
3215 if(xw.xic == NULL)
3216 die("XCreateIC failed. Could not obtain input method.\n");
3217
3218 /* white cursor, black outline */
3219 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3220 XDefineCursor(xw.dpy, xw.win, cursor);
3221 XRecolorCursor(xw.dpy, cursor,
3222 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3223 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3224
3225 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3226 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3227 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3228 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3229
3230 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3231 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3232 PropModeReplace, (uchar *)&thispid, 1);
3233
3234 xresettitle();
3235 XMapWindow(xw.dpy, xw.win);
3236 xhints();
3237 XSync(xw.dpy, False);
3238 }
3239
3240 void
3241 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3242 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3243 width = charlen * xw.cw, xp, i;
3244 int frcflags, charexists;
3245 int u8fl, u8fblen, u8cblen, doesexist;
3246 char *u8c, *u8fs;
3247 long unicodep;
3248 Font *font = &dc.font;
3249 FcResult fcres;
3250 FcPattern *fcpattern, *fontpattern;
3251 FcFontSet *fcsets[] = { NULL };
3252 FcCharSet *fccharset;
3253 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3254 XRenderColor colfg, colbg;
3255 XRectangle r;
3256 int oneatatime;
3257
3258 frcflags = FRC_NORMAL;
3259
3260 if(base.mode & ATTR_ITALIC) {
3261 if(base.fg == defaultfg)
3262 base.fg = defaultitalic;
3263 font = &dc.ifont;
3264 frcflags = FRC_ITALIC;
3265 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3266 if(base.fg == defaultfg)
3267 base.fg = defaultitalic;
3268 font = &dc.ibfont;
3269 frcflags = FRC_ITALICBOLD;
3270 } else if(base.mode & ATTR_UNDERLINE) {
3271 if(base.fg == defaultfg)
3272 base.fg = defaultunderline;
3273 }
3274
3275 if(IS_TRUECOL(base.fg)) {
3276 colfg.alpha = 0xffff;
3277 colfg.red = TRUERED(base.fg);
3278 colfg.green = TRUEGREEN(base.fg);
3279 colfg.blue = TRUEBLUE(base.fg);
3280 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3281 fg = &truefg;
3282 } else {
3283 fg = &dc.col[base.fg];
3284 }
3285
3286 if(IS_TRUECOL(base.bg)) {
3287 colbg.alpha = 0xffff;
3288 colbg.green = TRUEGREEN(base.bg);
3289 colbg.red = TRUERED(base.bg);
3290 colbg.blue = TRUEBLUE(base.bg);
3291 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3292 bg = &truebg;
3293 } else {
3294 bg = &dc.col[base.bg];
3295 }
3296
3297 if(base.mode & ATTR_BOLD) {
3298 /*
3299 * change basic system colors [0-7]
3300 * to bright system colors [8-15]
3301 */
3302 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3303 fg = &dc.col[base.fg + 8];
3304
3305 if(base.mode & ATTR_ITALIC) {
3306 font = &dc.ibfont;
3307 frcflags = FRC_ITALICBOLD;
3308 } else {
3309 font = &dc.bfont;
3310 frcflags = FRC_BOLD;
3311 }
3312 }
3313
3314 if(IS_SET(MODE_REVERSE)) {
3315 if(fg == &dc.col[defaultfg]) {
3316 fg = &dc.col[defaultbg];
3317 } else {
3318 colfg.red = ~fg->color.red;
3319 colfg.green = ~fg->color.green;
3320 colfg.blue = ~fg->color.blue;
3321 colfg.alpha = fg->color.alpha;
3322 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3323 &revfg);
3324 fg = &revfg;
3325 }
3326
3327 if(bg == &dc.col[defaultbg]) {
3328 bg = &dc.col[defaultfg];
3329 } else {
3330 colbg.red = ~bg->color.red;
3331 colbg.green = ~bg->color.green;
3332 colbg.blue = ~bg->color.blue;
3333 colbg.alpha = bg->color.alpha;
3334 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3335 &revbg);
3336 bg = &revbg;
3337 }
3338 }
3339
3340 if(base.mode & ATTR_REVERSE) {
3341 temp = fg;
3342 fg = bg;
3343 bg = temp;
3344 }
3345
3346 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3347 colfg.red = fg->color.red / 2;
3348 colfg.green = fg->color.green / 2;
3349 colfg.blue = fg->color.blue / 2;
3350 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3351 fg = &revfg;
3352 }
3353
3354 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3355 fg = bg;
3356
3357 if(base.mode & ATTR_INVISIBLE)
3358 fg = bg;
3359
3360 /* Intelligent cleaning up of the borders. */
3361 if(x == 0) {
3362 xclear(0, (y == 0)? 0 : winy, borderpx,
3363 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3364 }
3365 if(x + charlen >= term.col) {
3366 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3367 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3368 }
3369 if(y == 0)
3370 xclear(winx, 0, winx + width, borderpx);
3371 if(y == term.row-1)
3372 xclear(winx, winy + xw.ch, winx + width, xw.h);
3373
3374 /* Clean up the region we want to draw to. */
3375 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3376
3377 /* Set the clip region because Xft is sometimes dirty. */
3378 r.x = 0;
3379 r.y = 0;
3380 r.height = xw.ch;
3381 r.width = width;
3382 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3383
3384 for(xp = winx; bytelen > 0;) {
3385 /*
3386 * Search for the range in the to be printed string of glyphs
3387 * that are in the main font. Then print that range. If
3388 * some glyph is found that is not in the font, do the
3389 * fallback dance.
3390 */
3391 u8fs = s;
3392 u8fblen = 0;
3393 u8fl = 0;
3394 oneatatime = font->width != xw.cw;
3395 for(;;) {
3396 u8c = s;
3397 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3398 s += u8cblen;
3399 bytelen -= u8cblen;
3400
3401 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3402 if(doesexist) {
3403 u8fl++;
3404 u8fblen += u8cblen;
3405 if(!oneatatime && bytelen > 0)
3406 continue;
3407 }
3408
3409 if(u8fl > 0) {
3410 XftDrawStringUtf8(xw.draw, fg,
3411 font->match, xp,
3412 winy + font->ascent,
3413 (FcChar8 *)u8fs,
3414 u8fblen);
3415 xp += xw.cw * u8fl;
3416 }
3417 break;
3418 }
3419 if(doesexist) {
3420 if(oneatatime)
3421 continue;
3422 break;
3423 }
3424
3425 /* Search the font cache. */
3426 for(i = 0; i < frclen; i++) {
3427 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3428 /* Everything correct. */
3429 if(charexists && frc[i].flags == frcflags)
3430 break;
3431 /* We got a default font for a not found glyph. */
3432 if(!charexists && frc[i].flags == frcflags \
3433 && frc[i].unicodep == unicodep) {
3434 break;
3435 }
3436 }
3437
3438 /* Nothing was found. */
3439 if(i >= frclen) {
3440 if(!font->set)
3441 xloadfontset(font);
3442 fcsets[0] = font->set;
3443
3444 /*
3445 * Nothing was found in the cache. Now use
3446 * some dozen of Fontconfig calls to get the
3447 * font for one single character.
3448 *
3449 * Xft and fontconfig are design failures.
3450 */
3451 fcpattern = FcPatternDuplicate(font->pattern);
3452 fccharset = FcCharSetCreate();
3453
3454 FcCharSetAddChar(fccharset, unicodep);
3455 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3456 fccharset);
3457 FcPatternAddBool(fcpattern, FC_SCALABLE,
3458 FcTrue);
3459
3460 FcConfigSubstitute(0, fcpattern,
3461 FcMatchPattern);
3462 FcDefaultSubstitute(fcpattern);
3463
3464 fontpattern = FcFontSetMatch(0, fcsets, 1,
3465 fcpattern, &fcres);
3466
3467 /*
3468 * Overwrite or create the new cache entry.
3469 */
3470 if(frclen >= LEN(frc)) {
3471 frclen = LEN(frc) - 1;
3472 XftFontClose(xw.dpy, frc[frclen].font);
3473 frc[frclen].unicodep = 0;
3474 }
3475
3476 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3477 fontpattern);
3478 frc[frclen].flags = frcflags;
3479 frc[frclen].unicodep = unicodep;
3480
3481 i = frclen;
3482 frclen++;
3483
3484 FcPatternDestroy(fcpattern);
3485 FcCharSetDestroy(fccharset);
3486 }
3487
3488 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3489 xp, winy + frc[i].font->ascent,
3490 (FcChar8 *)u8c, u8cblen);
3491
3492 xp += xw.cw * wcwidth(unicodep);
3493 }
3494
3495 /*
3496 * This is how the loop above actually should be. Why does the
3497 * application have to care about font details?
3498 *
3499 * I have to repeat: Xft and Fontconfig are design failures.
3500 */
3501 /*
3502 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3503 winy + font->ascent, (FcChar8 *)s, bytelen);
3504 */
3505
3506 if(base.mode & ATTR_UNDERLINE) {
3507 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3508 width, 1);
3509 }
3510
3511 if(base.mode & ATTR_STRUCK) {
3512 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3513 width, 1);
3514 }
3515
3516 /* Reset clip to none. */
3517 XftDrawSetClip(xw.draw, 0);
3518 }
3519
3520 void
3521 xdrawcursor(void) {
3522 static int oldx = 0, oldy = 0;
3523 int sl, width, curx;
3524 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3525
3526 LIMIT(oldx, 0, term.col-1);
3527 LIMIT(oldy, 0, term.row-1);
3528
3529 curx = term.c.x;
3530
3531 /* adjust position if in dummy */
3532 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3533 oldx--;
3534 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3535 curx--;
3536
3537 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3538
3539 /* remove the old cursor */
3540 sl = utf8len(term.line[oldy][oldx].c);
3541 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3542 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3543 oldy, width, sl);
3544
3545 if(IS_SET(MODE_HIDE))
3546 return;
3547
3548 /* draw the new one */
3549 if(xw.state & WIN_FOCUSED) {
3550 if(IS_SET(MODE_REVERSE)) {
3551 g.mode |= ATTR_REVERSE;
3552 g.fg = defaultcs;
3553 g.bg = defaultfg;
3554 }
3555
3556 sl = utf8len(g.c);
3557 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3558 ? 2 : 1;
3559 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3560 } else {
3561 XftDrawRect(xw.draw, &dc.col[defaultcs],
3562 borderpx + curx * xw.cw,
3563 borderpx + term.c.y * xw.ch,
3564 xw.cw - 1, 1);
3565 XftDrawRect(xw.draw, &dc.col[defaultcs],
3566 borderpx + curx * xw.cw,
3567 borderpx + term.c.y * xw.ch,
3568 1, xw.ch - 1);
3569 XftDrawRect(xw.draw, &dc.col[defaultcs],
3570 borderpx + (curx + 1) * xw.cw - 1,
3571 borderpx + term.c.y * xw.ch,
3572 1, xw.ch - 1);
3573 XftDrawRect(xw.draw, &dc.col[defaultcs],
3574 borderpx + curx * xw.cw,
3575 borderpx + (term.c.y + 1) * xw.ch - 1,
3576 xw.cw, 1);
3577 }
3578 oldx = curx, oldy = term.c.y;
3579 }
3580
3581
3582 void
3583 xsettitle(char *p) {
3584 XTextProperty prop;
3585
3586 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3587 &prop);
3588 XSetWMName(xw.dpy, xw.win, &prop);
3589 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3590 XFree(prop.value);
3591 }
3592
3593 void
3594 xresettitle(void) {
3595 xsettitle(opt_title ? opt_title : "st");
3596 }
3597
3598 void
3599 redraw(void) {
3600 tfulldirt();
3601 draw();
3602 }
3603
3604 void
3605 draw(void) {
3606 drawregion(0, 0, term.col, term.row);
3607 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3608 xw.h, 0, 0);
3609 XSetForeground(xw.dpy, dc.gc,
3610 dc.col[IS_SET(MODE_REVERSE)?
3611 defaultfg : defaultbg].pixel);
3612 }
3613
3614 void
3615 drawregion(int x1, int y1, int x2, int y2) {
3616 int ic, ib, x, y, ox, sl;
3617 Glyph base, new;
3618 char buf[DRAW_BUF_SIZ];
3619 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3620 long unicodep;
3621
3622 if(!(xw.state & WIN_VISIBLE))
3623 return;
3624
3625 for(y = y1; y < y2; y++) {
3626 if(!term.dirty[y])
3627 continue;
3628
3629 xtermclear(0, y, term.col, y);
3630 term.dirty[y] = 0;
3631 base = term.line[y][0];
3632 ic = ib = ox = 0;
3633 for(x = x1; x < x2; x++) {
3634 new = term.line[y][x];
3635 if(new.mode == ATTR_WDUMMY)
3636 continue;
3637 if(ena_sel && selected(x, y))
3638 new.mode ^= ATTR_REVERSE;
3639 if(ib > 0 && (ATTRCMP(base, new)
3640 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3641 xdraws(buf, base, ox, y, ic, ib);
3642 ic = ib = 0;
3643 }
3644 if(ib == 0) {
3645 ox = x;
3646 base = new;
3647 }
3648
3649 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3650 memcpy(buf+ib, new.c, sl);
3651 ib += sl;
3652 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3653 }
3654 if(ib > 0)
3655 xdraws(buf, base, ox, y, ic, ib);
3656 }
3657 xdrawcursor();
3658 }
3659
3660 void
3661 expose(XEvent *ev) {
3662 XExposeEvent *e = &ev->xexpose;
3663
3664 if(xw.state & WIN_REDRAW) {
3665 if(!e->count)
3666 xw.state &= ~WIN_REDRAW;
3667 }
3668 redraw();
3669 }
3670
3671 void
3672 visibility(XEvent *ev) {
3673 XVisibilityEvent *e = &ev->xvisibility;
3674
3675 if(e->state == VisibilityFullyObscured) {
3676 xw.state &= ~WIN_VISIBLE;
3677 } else if(!(xw.state & WIN_VISIBLE)) {
3678 /* need a full redraw for next Expose, not just a buf copy */
3679 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3680 }
3681 }
3682
3683 void
3684 unmap(XEvent *ev) {
3685 xw.state &= ~WIN_VISIBLE;
3686 }
3687
3688 void
3689 xsetpointermotion(int set) {
3690 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3691 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3692 }
3693
3694 void
3695 xseturgency(int add) {
3696 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3697
3698 MODBIT(h->flags, add, XUrgencyHint);
3699 XSetWMHints(xw.dpy, xw.win, h);
3700 XFree(h);
3701 }
3702
3703 void
3704 focus(XEvent *ev) {
3705 XFocusChangeEvent *e = &ev->xfocus;
3706
3707 if(e->mode == NotifyGrab)
3708 return;
3709
3710 if(ev->type == FocusIn) {
3711 XSetICFocus(xw.xic);
3712 xw.state |= WIN_FOCUSED;
3713 xseturgency(0);
3714 if(IS_SET(MODE_FOCUS))
3715 ttywrite("\033[I", 3);
3716 } else {
3717 XUnsetICFocus(xw.xic);
3718 xw.state &= ~WIN_FOCUSED;
3719 if(IS_SET(MODE_FOCUS))
3720 ttywrite("\033[O", 3);
3721 }
3722 }
3723
3724 static inline bool
3725 match(uint mask, uint state) {
3726 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3727 }
3728
3729 void
3730 numlock(const Arg *dummy) {
3731 term.numlock ^= 1;
3732 }
3733
3734 char*
3735 kmap(KeySym k, uint state) {
3736 Key *kp;
3737 int i;
3738
3739 /* Check for mapped keys out of X11 function keys. */
3740 for(i = 0; i < LEN(mappedkeys); i++) {
3741 if(mappedkeys[i] == k)
3742 break;
3743 }
3744 if(i == LEN(mappedkeys)) {
3745 if((k & 0xFFFF) < 0xFD00)
3746 return NULL;
3747 }
3748
3749 for(kp = key; kp < key + LEN(key); kp++) {
3750 if(kp->k != k)
3751 continue;
3752
3753 if(!match(kp->mask, state))
3754 continue;
3755
3756 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3757 continue;
3758 if(term.numlock && kp->appkey == 2)
3759 continue;
3760
3761 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3762 continue;
3763
3764 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3765 continue;
3766
3767 return kp->s;
3768 }
3769
3770 return NULL;
3771 }
3772
3773 void
3774 kpress(XEvent *ev) {
3775 XKeyEvent *e = &ev->xkey;
3776 KeySym ksym;
3777 char buf[32], *customkey;
3778 int len;
3779 long c;
3780 Status status;
3781 Shortcut *bp;
3782
3783 if(IS_SET(MODE_KBDLOCK))
3784 return;
3785
3786 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3787 /* 1. shortcuts */
3788 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3789 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3790 bp->func(&(bp->arg));
3791 return;
3792 }
3793 }
3794
3795 /* 2. custom keys from config.h */
3796 if((customkey = kmap(ksym, e->state))) {
3797 ttysend(customkey, strlen(customkey));
3798 return;
3799 }
3800
3801 /* 3. composed string from input method */
3802 if(len == 0)
3803 return;
3804 if(len == 1 && e->state & Mod1Mask) {
3805 if(IS_SET(MODE_8BIT)) {
3806 if(*buf < 0177) {
3807 c = *buf | 0x80;
3808 len = utf8encode(c, buf, UTF_SIZ);
3809 }
3810 } else {
3811 buf[1] = buf[0];
3812 buf[0] = '\033';
3813 len = 2;
3814 }
3815 }
3816 ttysend(buf, len);
3817 }
3818
3819
3820 void
3821 cmessage(XEvent *e) {
3822 /*
3823 * See xembed specs
3824 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3825 */
3826 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3827 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3828 xw.state |= WIN_FOCUSED;
3829 xseturgency(0);
3830 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3831 xw.state &= ~WIN_FOCUSED;
3832 }
3833 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3834 /* Send SIGHUP to shell */
3835 kill(pid, SIGHUP);
3836 exit(EXIT_SUCCESS);
3837 }
3838 }
3839
3840 void
3841 cresize(int width, int height) {
3842 int col, row;
3843
3844 if(width != 0)
3845 xw.w = width;
3846 if(height != 0)
3847 xw.h = height;
3848
3849 col = (xw.w - 2 * borderpx) / xw.cw;
3850 row = (xw.h - 2 * borderpx) / xw.ch;
3851
3852 tresize(col, row);
3853 xresize(col, row);
3854 ttyresize();
3855 }
3856
3857 void
3858 resize(XEvent *e) {
3859 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3860 return;
3861
3862 cresize(e->xconfigure.width, e->xconfigure.height);
3863 }
3864
3865 void
3866 run(void) {
3867 XEvent ev;
3868 int w = xw.w, h = xw.h;
3869 fd_set rfd;
3870 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3871 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3872 long deltatime;
3873
3874 /* Waiting for window mapping */
3875 while(1) {
3876 XNextEvent(xw.dpy, &ev);
3877 if(XFilterEvent(&ev, None))
3878 continue;
3879 if(ev.type == ConfigureNotify) {
3880 w = ev.xconfigure.width;
3881 h = ev.xconfigure.height;
3882 } else if(ev.type == MapNotify) {
3883 break;
3884 }
3885 }
3886
3887 ttynew();
3888 cresize(w, h);
3889
3890 clock_gettime(CLOCK_MONOTONIC, &last);
3891 lastblink = last;
3892
3893 for(xev = actionfps;;) {
3894 FD_ZERO(&rfd);
3895 FD_SET(cmdfd, &rfd);
3896 FD_SET(xfd, &rfd);
3897
3898 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3899 if(errno == EINTR)
3900 continue;
3901 die("select failed: %s\n", strerror(errno));
3902 }
3903 if(FD_ISSET(cmdfd, &rfd)) {
3904 ttyread();
3905 if(blinktimeout) {
3906 blinkset = tattrset(ATTR_BLINK);
3907 if(!blinkset)
3908 MODBIT(term.mode, 0, MODE_BLINK);
3909 }
3910 }
3911
3912 if(FD_ISSET(xfd, &rfd))
3913 xev = actionfps;
3914
3915 clock_gettime(CLOCK_MONOTONIC, &now);
3916 drawtimeout.tv_sec = 0;
3917 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3918 tv = &drawtimeout;
3919
3920 dodraw = 0;
3921 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3922 tsetdirtattr(ATTR_BLINK);
3923 term.mode ^= MODE_BLINK;
3924 lastblink = now;
3925 dodraw = 1;
3926 }
3927 deltatime = TIMEDIFF(now, last);
3928 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3929 || deltatime < 0) {
3930 dodraw = 1;
3931 last = now;
3932 }
3933
3934 if(dodraw) {
3935 while(XPending(xw.dpy)) {
3936 XNextEvent(xw.dpy, &ev);
3937 if(XFilterEvent(&ev, None))
3938 continue;
3939 if(handler[ev.type])
3940 (handler[ev.type])(&ev);
3941 }
3942
3943 draw();
3944 XFlush(xw.dpy);
3945
3946 if(xev && !FD_ISSET(xfd, &rfd))
3947 xev--;
3948 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3949 if(blinkset) {
3950 if(TIMEDIFF(now, lastblink) \
3951 > blinktimeout) {
3952 drawtimeout.tv_nsec = 1000;
3953 } else {
3954 drawtimeout.tv_nsec = (1E6 * \
3955 (blinktimeout - \
3956 TIMEDIFF(now,
3957 lastblink)));
3958 }
3959 drawtimeout.tv_sec = \
3960 drawtimeout.tv_nsec / 1E9;
3961 drawtimeout.tv_nsec %= (long)1E9;
3962 } else {
3963 tv = NULL;
3964 }
3965 }
3966 }
3967 }
3968 }
3969
3970 void
3971 usage(void) {
3972 die("%s " VERSION " (c) 2010-2015 st engineers\n" \
3973 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3974 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3975 }
3976
3977 int
3978 main(int argc, char *argv[]) {
3979 char *titles;
3980 uint cols = 80, rows = 24;
3981
3982 xw.l = xw.t = 0;
3983 xw.isfixed = False;
3984
3985 ARGBEGIN {
3986 case 'a':
3987 allowaltscreen = false;
3988 break;
3989 case 'c':
3990 opt_class = EARGF(usage());
3991 break;
3992 case 'e':
3993 /* eat all remaining arguments */
3994 if(argc > 1) {
3995 opt_cmd = &argv[1];
3996 if(argv[1] != NULL && opt_title == NULL) {
3997 titles = xstrdup(argv[1]);
3998 opt_title = basename(titles);
3999 }
4000 }
4001 goto run;
4002 case 'f':
4003 opt_font = EARGF(usage());
4004 break;
4005 case 'g':
4006 xw.gm = XParseGeometry(EARGF(usage()),
4007 &xw.l, &xw.t, &cols, &rows);
4008 break;
4009 case 'i':
4010 xw.isfixed = True;
4011 break;
4012 case 'o':
4013 opt_io = EARGF(usage());
4014 break;
4015 case 't':
4016 opt_title = EARGF(usage());
4017 break;
4018 case 'w':
4019 opt_embed = EARGF(usage());
4020 break;
4021 case 'v':
4022 default:
4023 usage();
4024 } ARGEND;
4025
4026 run:
4027 setlocale(LC_CTYPE, "");
4028 XSetLocaleModifiers("");
4029 tnew(cols? cols : 1, rows? rows : 1);
4030 xinit();
4031 selinit();
4032 run();
4033
4034 return 0;
4035 }
4036