Xinqi Bao's Git

projects / st.git / blob
summary | log | commit | diff | tree
history | raw | HEAD
Handle pasting of empty selection.
[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 if (xsev->property == None)
999 return;
1000 do {
1001 if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
1002 BUFSIZ/4, False, AnyPropertyType,
1003 &type, &format, &nitems, &rem,
1004 &data)) {
1005 fprintf(stderr, "Clipboard allocation failed\n");
1006 return;
1007 }
1008
1009 /*
1010 * As seen in getsel:
1011 * Line endings are inconsistent in the terminal and GUI world
1012 * copy and pasting. When receiving some selection data,
1013 * replace all '\n' with '\r'.
1014 * FIXME: Fix the computer world.
1015 */
1016 repl = data;
1017 last = data + nitems * format / 8;
1018 while((repl = memchr(repl, '\n', last - repl))) {
1019 *repl++ = '\r';
1020 }
1021
1022 if(IS_SET(MODE_BRCKTPASTE))
1023 ttywrite("\033[200~", 6);
1024 ttysend((char *)data, nitems * format / 8);
1025 if(IS_SET(MODE_BRCKTPASTE))
1026 ttywrite("\033[201~", 6);
1027 XFree(data);
1028 /* number of 32-bit chunks returned */
1029 ofs += nitems * format / 32;
1030 } while(rem > 0);
1031 }
1032
1033 void
1034 selpaste(const Arg *dummy) {
1035 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1036 xw.win, CurrentTime);
1037 }
1038
1039 void
1040 clipcopy(const Arg *dummy) {
1041 Atom clipboard;
1042
1043 if(sel.clipboard != NULL)
1044 free(sel.clipboard);
1045
1046 if(sel.primary != NULL) {
1047 sel.clipboard = xstrdup(sel.primary);
1048 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1049 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1050 }
1051 }
1052
1053 void
1054 clippaste(const Arg *dummy) {
1055 Atom clipboard;
1056
1057 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1058 XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
1059 xw.win, CurrentTime);
1060 }
1061
1062 void
1063 selclear(XEvent *e) {
1064 if(sel.ob.x == -1)
1065 return;
1066 sel.ob.x = -1;
1067 tsetdirt(sel.nb.y, sel.ne.y);
1068 }
1069
1070 void
1071 selrequest(XEvent *e) {
1072 XSelectionRequestEvent *xsre;
1073 XSelectionEvent xev;
1074 Atom xa_targets, string, clipboard;
1075 char *seltext;
1076
1077 xsre = (XSelectionRequestEvent *) e;
1078 xev.type = SelectionNotify;
1079 xev.requestor = xsre->requestor;
1080 xev.selection = xsre->selection;
1081 xev.target = xsre->target;
1082 xev.time = xsre->time;
1083 /* reject */
1084 xev.property = None;
1085
1086 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1087 if(xsre->target == xa_targets) {
1088 /* respond with the supported type */
1089 string = sel.xtarget;
1090 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1091 XA_ATOM, 32, PropModeReplace,
1092 (uchar *) &string, 1);
1093 xev.property = xsre->property;
1094 } else if(xsre->target == sel.xtarget || xsre->target == XA_STRING) {
1095 /*
1096 * xith XA_STRING non ascii characters may be incorrect in the
1097 * requestor. It is not our problem, use utf8.
1098 */
1099 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1100 if(xsre->selection == XA_PRIMARY) {
1101 seltext = sel.primary;
1102 } else if(xsre->selection == clipboard) {
1103 seltext = sel.clipboard;
1104 } else {
1105 fprintf(stderr,
1106 "Unhandled clipboard selection 0x%lx\n",
1107 xsre->selection);
1108 return;
1109 }
1110 if(seltext != NULL) {
1111 XChangeProperty(xsre->display, xsre->requestor,
1112 xsre->property, xsre->target,
1113 8, PropModeReplace,
1114 (uchar *)seltext, strlen(seltext));
1115 xev.property = xsre->property;
1116 }
1117 }
1118
1119 /* all done, send a notification to the listener */
1120 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1121 fprintf(stderr, "Error sending SelectionNotify event\n");
1122 }
1123
1124 void
1125 xsetsel(char *str) {
1126 free(sel.primary);
1127 sel.primary = str;
1128
1129 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1130 }
1131
1132 void
1133 brelease(XEvent *e) {
1134 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1135 mousereport(e);
1136 return;
1137 }
1138
1139 if(e->xbutton.button == Button2) {
1140 selpaste(NULL);
1141 } else if(e->xbutton.button == Button1) {
1142 if(sel.mode < 2) {
1143 selclear(NULL);
1144 } else {
1145 getbuttoninfo(e);
1146 selcopy();
1147 }
1148 sel.mode = 0;
1149 tsetdirt(sel.nb.y, sel.ne.y);
1150 }
1151 }
1152
1153 void
1154 bmotion(XEvent *e) {
1155 int oldey, oldex, oldsby, oldsey;
1156
1157 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1158 mousereport(e);
1159 return;
1160 }
1161
1162 if(!sel.mode)
1163 return;
1164
1165 sel.mode++;
1166 oldey = sel.oe.y;
1167 oldex = sel.oe.x;
1168 oldsby = sel.nb.y;
1169 oldsey = sel.ne.y;
1170 getbuttoninfo(e);
1171
1172 if(oldey != sel.oe.y || oldex != sel.oe.x)
1173 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1174 }
1175
1176 void
1177 die(const char *errstr, ...) {
1178 va_list ap;
1179
1180 va_start(ap, errstr);
1181 vfprintf(stderr, errstr, ap);
1182 va_end(ap);
1183 exit(EXIT_FAILURE);
1184 }
1185
1186 void
1187 execsh(void) {
1188 char **args, *sh, *prog;
1189 const struct passwd *pw;
1190 char buf[sizeof(long) * 8 + 1];
1191
1192 errno = 0;
1193 if((pw = getpwuid(getuid())) == NULL) {
1194 if(errno)
1195 die("getpwuid:%s\n", strerror(errno));
1196 else
1197 die("who are you?\n");
1198 }
1199
1200 if (!(sh = getenv("SHELL"))) {
1201 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
1202 }
1203
1204 if(opt_cmd)
1205 prog = opt_cmd[0];
1206 else if(utmp)
1207 prog = utmp;
1208 else
1209 prog = sh;
1210 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
1211
1212 snprintf(buf, sizeof(buf), "%lu", xw.win);
1213
1214 unsetenv("COLUMNS");
1215 unsetenv("LINES");
1216 unsetenv("TERMCAP");
1217 setenv("LOGNAME", pw->pw_name, 1);
1218 setenv("USER", pw->pw_name, 1);
1219 setenv("SHELL", sh, 1);
1220 setenv("HOME", pw->pw_dir, 1);
1221 setenv("TERM", termname, 1);
1222 setenv("WINDOWID", buf, 1);
1223
1224 signal(SIGCHLD, SIG_DFL);
1225 signal(SIGHUP, SIG_DFL);
1226 signal(SIGINT, SIG_DFL);
1227 signal(SIGQUIT, SIG_DFL);
1228 signal(SIGTERM, SIG_DFL);
1229 signal(SIGALRM, SIG_DFL);
1230
1231 execvp(prog, args);
1232 _exit(EXIT_FAILURE);
1233 }
1234
1235 void
1236 sigchld(int a) {
1237 int stat, ret;
1238
1239 if(waitpid(pid, &stat, 0) < 0)
1240 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1241
1242 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1243 if (ret != EXIT_SUCCESS)
1244 die("child finished with error '%d'\n", stat);
1245 exit(EXIT_SUCCESS);
1246 }
1247
1248 void
1249 ttynew(void) {
1250 int m, s;
1251 struct winsize w = {term.row, term.col, 0, 0};
1252
1253 /* seems to work fine on linux, openbsd and freebsd */
1254 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1255 die("openpty failed: %s\n", strerror(errno));
1256
1257 switch(pid = fork()) {
1258 case -1:
1259 die("fork failed\n");
1260 break;
1261 case 0:
1262 setsid(); /* create a new process group */
1263 dup2(s, STDIN_FILENO);
1264 dup2(s, STDOUT_FILENO);
1265 dup2(s, STDERR_FILENO);
1266 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1267 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1268 close(s);
1269 close(m);
1270 execsh();
1271 break;
1272 default:
1273 close(s);
1274 cmdfd = m;
1275 signal(SIGCHLD, sigchld);
1276 if(opt_io) {
1277 term.mode |= MODE_PRINT;
1278 iofd = (!strcmp(opt_io, "-")) ?
1279 STDOUT_FILENO :
1280 open(opt_io, O_WRONLY | O_CREAT, 0666);
1281 if(iofd < 0) {
1282 fprintf(stderr, "Error opening %s:%s\n",
1283 opt_io, strerror(errno));
1284 }
1285 }
1286 break;
1287 }
1288 }
1289
1290 void
1291 ttyread(void) {
1292 static char buf[BUFSIZ];
1293 static int buflen = 0;
1294 char *ptr;
1295 char s[UTF_SIZ];
1296 int charsize; /* size of utf8 char in bytes */
1297 long unicodep;
1298 int ret;
1299
1300 /* append read bytes to unprocessed bytes */
1301 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1302 die("Couldn't read from shell: %s\n", strerror(errno));
1303
1304 /* process every complete utf8 char */
1305 buflen += ret;
1306 ptr = buf;
1307 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1308 utf8encode(unicodep, s, UTF_SIZ);
1309 tputc(s, charsize);
1310 ptr += charsize;
1311 buflen -= charsize;
1312 }
1313
1314 /* keep any uncomplete utf8 char for the next call */
1315 memmove(buf, ptr, buflen);
1316 }
1317
1318 void
1319 ttywrite(const char *s, size_t n) {
1320 if(xwrite(cmdfd, s, n) == -1)
1321 die("write error on tty: %s\n", strerror(errno));
1322 }
1323
1324 void
1325 ttysend(char *s, size_t n) {
1326 ttywrite(s, n);
1327 if(IS_SET(MODE_ECHO))
1328 techo(s, n);
1329 }
1330
1331 void
1332 ttyresize(void) {
1333 struct winsize w;
1334
1335 w.ws_row = term.row;
1336 w.ws_col = term.col;
1337 w.ws_xpixel = xw.tw;
1338 w.ws_ypixel = xw.th;
1339 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1340 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1341 }
1342
1343 int
1344 tattrset(int attr) {
1345 int i, j;
1346
1347 for(i = 0; i < term.row-1; i++) {
1348 for(j = 0; j < term.col-1; j++) {
1349 if(term.line[i][j].mode & attr)
1350 return 1;
1351 }
1352 }
1353
1354 return 0;
1355 }
1356
1357 void
1358 tsetdirt(int top, int bot) {
1359 int i;
1360
1361 LIMIT(top, 0, term.row-1);
1362 LIMIT(bot, 0, term.row-1);
1363
1364 for(i = top; i <= bot; i++)
1365 term.dirty[i] = 1;
1366 }
1367
1368 void
1369 tsetdirtattr(int attr) {
1370 int i, j;
1371
1372 for(i = 0; i < term.row-1; i++) {
1373 for(j = 0; j < term.col-1; j++) {
1374 if(term.line[i][j].mode & attr) {
1375 tsetdirt(i, i);
1376 break;
1377 }
1378 }
1379 }
1380 }
1381
1382 void
1383 tfulldirt(void) {
1384 tsetdirt(0, term.row-1);
1385 }
1386
1387 void
1388 tcursor(int mode) {
1389 static TCursor c[2];
1390 bool alt = IS_SET(MODE_ALTSCREEN);
1391
1392 if(mode == CURSOR_SAVE) {
1393 c[alt] = term.c;
1394 } else if(mode == CURSOR_LOAD) {
1395 term.c = c[alt];
1396 tmoveto(c[alt].x, c[alt].y);
1397 }
1398 }
1399
1400 void
1401 treset(void) {
1402 uint i;
1403
1404 term.c = (TCursor){{
1405 .mode = ATTR_NULL,
1406 .fg = defaultfg,
1407 .bg = defaultbg
1408 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1409
1410 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1411 for(i = tabspaces; i < term.col; i += tabspaces)
1412 term.tabs[i] = 1;
1413 term.top = 0;
1414 term.bot = term.row - 1;
1415 term.mode = MODE_WRAP;
1416 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1417 term.charset = 0;
1418
1419 for(i = 0; i < 2; i++) {
1420 tmoveto(0, 0);
1421 tcursor(CURSOR_SAVE);
1422 tclearregion(0, 0, term.col-1, term.row-1);
1423 tswapscreen();
1424 }
1425 }
1426
1427 void
1428 tnew(int col, int row) {
1429 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1430 tresize(col, row);
1431 term.numlock = 1;
1432
1433 treset();
1434 }
1435
1436 void
1437 tswapscreen(void) {
1438 Line *tmp = term.line;
1439
1440 term.line = term.alt;
1441 term.alt = tmp;
1442 term.mode ^= MODE_ALTSCREEN;
1443 tfulldirt();
1444 }
1445
1446 void
1447 tscrolldown(int orig, int n) {
1448 int i;
1449 Line temp;
1450
1451 LIMIT(n, 0, term.bot-orig+1);
1452
1453 tsetdirt(orig, term.bot-n);
1454 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1455
1456 for(i = term.bot; i >= orig+n; i--) {
1457 temp = term.line[i];
1458 term.line[i] = term.line[i-n];
1459 term.line[i-n] = temp;
1460 }
1461
1462 selscroll(orig, n);
1463 }
1464
1465 void
1466 tscrollup(int orig, int n) {
1467 int i;
1468 Line temp;
1469
1470 LIMIT(n, 0, term.bot-orig+1);
1471
1472 tclearregion(0, orig, term.col-1, orig+n-1);
1473 tsetdirt(orig+n, term.bot);
1474
1475 for(i = orig; i <= term.bot-n; i++) {
1476 temp = term.line[i];
1477 term.line[i] = term.line[i+n];
1478 term.line[i+n] = temp;
1479 }
1480
1481 selscroll(orig, -n);
1482 }
1483
1484 void
1485 selscroll(int orig, int n) {
1486 if(sel.ob.x == -1)
1487 return;
1488
1489 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1490 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1491 selclear(NULL);
1492 return;
1493 }
1494 if(sel.type == SEL_RECTANGULAR) {
1495 if(sel.ob.y < term.top)
1496 sel.ob.y = term.top;
1497 if(sel.oe.y > term.bot)
1498 sel.oe.y = term.bot;
1499 } else {
1500 if(sel.ob.y < term.top) {
1501 sel.ob.y = term.top;
1502 sel.ob.x = 0;
1503 }
1504 if(sel.oe.y > term.bot) {
1505 sel.oe.y = term.bot;
1506 sel.oe.x = term.col;
1507 }
1508 }
1509 selnormalize();
1510 }
1511 }
1512
1513 void
1514 tnewline(int first_col) {
1515 int y = term.c.y;
1516
1517 if(y == term.bot) {
1518 tscrollup(term.top, 1);
1519 } else {
1520 y++;
1521 }
1522 tmoveto(first_col ? 0 : term.c.x, y);
1523 }
1524
1525 void
1526 csiparse(void) {
1527 char *p = csiescseq.buf, *np;
1528 long int v;
1529
1530 csiescseq.narg = 0;
1531 if(*p == '?') {
1532 csiescseq.priv = 1;
1533 p++;
1534 }
1535
1536 csiescseq.buf[csiescseq.len] = '\0';
1537 while(p < csiescseq.buf+csiescseq.len) {
1538 np = NULL;
1539 v = strtol(p, &np, 10);
1540 if(np == p)
1541 v = 0;
1542 if(v == LONG_MAX || v == LONG_MIN)
1543 v = -1;
1544 csiescseq.arg[csiescseq.narg++] = v;
1545 p = np;
1546 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1547 break;
1548 p++;
1549 }
1550 csiescseq.mode = *p;
1551 }
1552
1553 /* for absolute user moves, when decom is set */
1554 void
1555 tmoveato(int x, int y) {
1556 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1557 }
1558
1559 void
1560 tmoveto(int x, int y) {
1561 int miny, maxy;
1562
1563 if(term.c.state & CURSOR_ORIGIN) {
1564 miny = term.top;
1565 maxy = term.bot;
1566 } else {
1567 miny = 0;
1568 maxy = term.row - 1;
1569 }
1570 LIMIT(x, 0, term.col-1);
1571 LIMIT(y, miny, maxy);
1572 term.c.state &= ~CURSOR_WRAPNEXT;
1573 term.c.x = x;
1574 term.c.y = y;
1575 }
1576
1577 void
1578 tsetchar(char *c, Glyph *attr, int x, int y) {
1579 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1580 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1581 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1582 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1583 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1584 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1585 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1586 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1587 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1588 };
1589
1590 /*
1591 * The table is proudly stolen from rxvt.
1592 */
1593 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1594 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1595 c = vt100_0[c[0] - 0x41];
1596 }
1597 }
1598
1599 if(term.line[y][x].mode & ATTR_WIDE) {
1600 if(x+1 < term.col) {
1601 term.line[y][x+1].c[0] = ' ';
1602 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1603 }
1604 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1605 term.line[y][x-1].c[0] = ' ';
1606 term.line[y][x-1].mode &= ~ATTR_WIDE;
1607 }
1608
1609 term.dirty[y] = 1;
1610 term.line[y][x] = *attr;
1611 memcpy(term.line[y][x].c, c, UTF_SIZ);
1612 }
1613
1614 void
1615 tclearregion(int x1, int y1, int x2, int y2) {
1616 int x, y, temp;
1617 Glyph *gp;
1618
1619 if(x1 > x2)
1620 temp = x1, x1 = x2, x2 = temp;
1621 if(y1 > y2)
1622 temp = y1, y1 = y2, y2 = temp;
1623
1624 LIMIT(x1, 0, term.col-1);
1625 LIMIT(x2, 0, term.col-1);
1626 LIMIT(y1, 0, term.row-1);
1627 LIMIT(y2, 0, term.row-1);
1628
1629 for(y = y1; y <= y2; y++) {
1630 term.dirty[y] = 1;
1631 for(x = x1; x <= x2; x++) {
1632 gp = &term.line[y][x];
1633 if(selected(x, y))
1634 selclear(NULL);
1635 gp->fg = term.c.attr.fg;
1636 gp->bg = term.c.attr.bg;
1637 gp->mode = 0;
1638 memcpy(gp->c, " ", 2);
1639 }
1640 }
1641 }
1642
1643 void
1644 tdeletechar(int n) {
1645 int dst, src, size;
1646 Glyph *line;
1647
1648 LIMIT(n, 0, term.col - term.c.x);
1649
1650 dst = term.c.x;
1651 src = term.c.x + n;
1652 size = term.col - src;
1653 line = term.line[term.c.y];
1654
1655 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1656 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1657 }
1658
1659 void
1660 tinsertblank(int n) {
1661 int dst, src, size;
1662 Glyph *line;
1663
1664 LIMIT(n, 0, term.col - term.c.x);
1665
1666 dst = term.c.x + n;
1667 src = term.c.x;
1668 size = term.col - dst;
1669 line = term.line[term.c.y];
1670
1671 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1672 tclearregion(src, term.c.y, dst - 1, term.c.y);
1673 }
1674
1675 void
1676 tinsertblankline(int n) {
1677 if(BETWEEN(term.c.y, term.top, term.bot))
1678 tscrolldown(term.c.y, n);
1679 }
1680
1681 void
1682 tdeleteline(int n) {
1683 if(BETWEEN(term.c.y, term.top, term.bot))
1684 tscrollup(term.c.y, n);
1685 }
1686
1687 int32_t
1688 tdefcolor(int *attr, int *npar, int l) {
1689 int32_t idx = -1;
1690 uint r, g, b;
1691
1692 switch (attr[*npar + 1]) {
1693 case 2: /* direct color in RGB space */
1694 if (*npar + 4 >= l) {
1695 fprintf(stderr,
1696 "erresc(38): Incorrect number of parameters (%d)\n",
1697 *npar);
1698 break;
1699 }
1700 r = attr[*npar + 2];
1701 g = attr[*npar + 3];
1702 b = attr[*npar + 4];
1703 *npar += 4;
1704 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1705 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1706 r, g, b);
1707 else
1708 idx = TRUECOLOR(r, g, b);
1709 break;
1710 case 5: /* indexed color */
1711 if (*npar + 2 >= l) {
1712 fprintf(stderr,
1713 "erresc(38): Incorrect number of parameters (%d)\n",
1714 *npar);
1715 break;
1716 }
1717 *npar += 2;
1718 if(!BETWEEN(attr[*npar], 0, 255))
1719 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1720 else
1721 idx = attr[*npar];
1722 break;
1723 case 0: /* implemented defined (only foreground) */
1724 case 1: /* transparent */
1725 case 3: /* direct color in CMY space */
1726 case 4: /* direct color in CMYK space */
1727 default:
1728 fprintf(stderr,
1729 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1730 break;
1731 }
1732
1733 return idx;
1734 }
1735
1736 void
1737 tsetattr(int *attr, int l) {
1738 int i;
1739 int32_t idx;
1740
1741 for(i = 0; i < l; i++) {
1742 switch(attr[i]) {
1743 case 0:
1744 term.c.attr.mode &= ~(
1745 ATTR_BOLD |
1746 ATTR_FAINT |
1747 ATTR_ITALIC |
1748 ATTR_UNDERLINE |
1749 ATTR_BLINK |
1750 ATTR_REVERSE |
1751 ATTR_INVISIBLE |
1752 ATTR_STRUCK );
1753 term.c.attr.fg = defaultfg;
1754 term.c.attr.bg = defaultbg;
1755 break;
1756 case 1:
1757 term.c.attr.mode |= ATTR_BOLD;
1758 break;
1759 case 2:
1760 term.c.attr.mode |= ATTR_FAINT;
1761 break;
1762 case 3:
1763 term.c.attr.mode |= ATTR_ITALIC;
1764 break;
1765 case 4:
1766 term.c.attr.mode |= ATTR_UNDERLINE;
1767 break;
1768 case 5: /* slow blink */
1769 /* FALLTHROUGH */
1770 case 6: /* rapid blink */
1771 term.c.attr.mode |= ATTR_BLINK;
1772 break;
1773 case 7:
1774 term.c.attr.mode |= ATTR_REVERSE;
1775 break;
1776 case 8:
1777 term.c.attr.mode |= ATTR_INVISIBLE;
1778 break;
1779 case 9:
1780 term.c.attr.mode |= ATTR_STRUCK;
1781 break;
1782 case 22:
1783 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1784 break;
1785 case 23:
1786 term.c.attr.mode &= ~ATTR_ITALIC;
1787 break;
1788 case 24:
1789 term.c.attr.mode &= ~ATTR_UNDERLINE;
1790 break;
1791 case 25:
1792 term.c.attr.mode &= ~ATTR_BLINK;
1793 break;
1794 case 27:
1795 term.c.attr.mode &= ~ATTR_REVERSE;
1796 break;
1797 case 28:
1798 term.c.attr.mode &= ~ATTR_INVISIBLE;
1799 break;
1800 case 29:
1801 term.c.attr.mode &= ~ATTR_STRUCK;
1802 break;
1803 case 38:
1804 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1805 term.c.attr.fg = idx;
1806 break;
1807 case 39:
1808 term.c.attr.fg = defaultfg;
1809 break;
1810 case 48:
1811 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1812 term.c.attr.bg = idx;
1813 break;
1814 case 49:
1815 term.c.attr.bg = defaultbg;
1816 break;
1817 default:
1818 if(BETWEEN(attr[i], 30, 37)) {
1819 term.c.attr.fg = attr[i] - 30;
1820 } else if(BETWEEN(attr[i], 40, 47)) {
1821 term.c.attr.bg = attr[i] - 40;
1822 } else if(BETWEEN(attr[i], 90, 97)) {
1823 term.c.attr.fg = attr[i] - 90 + 8;
1824 } else if(BETWEEN(attr[i], 100, 107)) {
1825 term.c.attr.bg = attr[i] - 100 + 8;
1826 } else {
1827 fprintf(stderr,
1828 "erresc(default): gfx attr %d unknown\n",
1829 attr[i]), csidump();
1830 }
1831 break;
1832 }
1833 }
1834 }
1835
1836 void
1837 tsetscroll(int t, int b) {
1838 int temp;
1839
1840 LIMIT(t, 0, term.row-1);
1841 LIMIT(b, 0, term.row-1);
1842 if(t > b) {
1843 temp = t;
1844 t = b;
1845 b = temp;
1846 }
1847 term.top = t;
1848 term.bot = b;
1849 }
1850
1851 void
1852 tsetmode(bool priv, bool set, int *args, int narg) {
1853 int *lim, mode;
1854 bool alt;
1855
1856 for(lim = args + narg; args < lim; ++args) {
1857 if(priv) {
1858 switch(*args) {
1859 case 1: /* DECCKM -- Cursor key */
1860 MODBIT(term.mode, set, MODE_APPCURSOR);
1861 break;
1862 case 5: /* DECSCNM -- Reverse video */
1863 mode = term.mode;
1864 MODBIT(term.mode, set, MODE_REVERSE);
1865 if(mode != term.mode)
1866 redraw();
1867 break;
1868 case 6: /* DECOM -- Origin */
1869 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1870 tmoveato(0, 0);
1871 break;
1872 case 7: /* DECAWM -- Auto wrap */
1873 MODBIT(term.mode, set, MODE_WRAP);
1874 break;
1875 case 0: /* Error (IGNORED) */
1876 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1877 case 3: /* DECCOLM -- Column (IGNORED) */
1878 case 4: /* DECSCLM -- Scroll (IGNORED) */
1879 case 8: /* DECARM -- Auto repeat (IGNORED) */
1880 case 18: /* DECPFF -- Printer feed (IGNORED) */
1881 case 19: /* DECPEX -- Printer extent (IGNORED) */
1882 case 42: /* DECNRCM -- National characters (IGNORED) */
1883 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1884 break;
1885 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1886 MODBIT(term.mode, !set, MODE_HIDE);
1887 break;
1888 case 9: /* X10 mouse compatibility mode */
1889 xsetpointermotion(0);
1890 MODBIT(term.mode, 0, MODE_MOUSE);
1891 MODBIT(term.mode, set, MODE_MOUSEX10);
1892 break;
1893 case 1000: /* 1000: report button press */
1894 xsetpointermotion(0);
1895 MODBIT(term.mode, 0, MODE_MOUSE);
1896 MODBIT(term.mode, set, MODE_MOUSEBTN);
1897 break;
1898 case 1002: /* 1002: report motion on button press */
1899 xsetpointermotion(0);
1900 MODBIT(term.mode, 0, MODE_MOUSE);
1901 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1902 break;
1903 case 1003: /* 1003: enable all mouse motions */
1904 xsetpointermotion(set);
1905 MODBIT(term.mode, 0, MODE_MOUSE);
1906 MODBIT(term.mode, set, MODE_MOUSEMANY);
1907 break;
1908 case 1004: /* 1004: send focus events to tty */
1909 MODBIT(term.mode, set, MODE_FOCUS);
1910 break;
1911 case 1006: /* 1006: extended reporting mode */
1912 MODBIT(term.mode, set, MODE_MOUSESGR);
1913 break;
1914 case 1034:
1915 MODBIT(term.mode, set, MODE_8BIT);
1916 break;
1917 case 1049: /* swap screen & set/restore cursor as xterm */
1918 if (!allowaltscreen)
1919 break;
1920 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1921 /* FALLTHROUGH */
1922 case 47: /* swap screen */
1923 case 1047:
1924 if (!allowaltscreen)
1925 break;
1926 alt = IS_SET(MODE_ALTSCREEN);
1927 if(alt) {
1928 tclearregion(0, 0, term.col-1,
1929 term.row-1);
1930 }
1931 if(set ^ alt) /* set is always 1 or 0 */
1932 tswapscreen();
1933 if(*args != 1049)
1934 break;
1935 /* FALLTHROUGH */
1936 case 1048:
1937 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1938 break;
1939 case 2004: /* 2004: bracketed paste mode */
1940 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1941 break;
1942 /* Not implemented mouse modes. See comments there. */
1943 case 1001: /* mouse highlight mode; can hang the
1944 terminal by design when implemented. */
1945 case 1005: /* UTF-8 mouse mode; will confuse
1946 applications not supporting UTF-8
1947 and luit. */
1948 case 1015: /* urxvt mangled mouse mode; incompatible
1949 and can be mistaken for other control
1950 codes. */
1951 default:
1952 fprintf(stderr,
1953 "erresc: unknown private set/reset mode %d\n",
1954 *args);
1955 break;
1956 }
1957 } else {
1958 switch(*args) {
1959 case 0: /* Error (IGNORED) */
1960 break;
1961 case 2: /* KAM -- keyboard action */
1962 MODBIT(term.mode, set, MODE_KBDLOCK);
1963 break;
1964 case 4: /* IRM -- Insertion-replacement */
1965 MODBIT(term.mode, set, MODE_INSERT);
1966 break;
1967 case 12: /* SRM -- Send/Receive */
1968 MODBIT(term.mode, !set, MODE_ECHO);
1969 break;
1970 case 20: /* LNM -- Linefeed/new line */
1971 MODBIT(term.mode, set, MODE_CRLF);
1972 break;
1973 default:
1974 fprintf(stderr,
1975 "erresc: unknown set/reset mode %d\n",
1976 *args);
1977 break;
1978 }
1979 }
1980 }
1981 }
1982
1983 void
1984 csihandle(void) {
1985 char buf[40];
1986 int len;
1987
1988 switch(csiescseq.mode) {
1989 default:
1990 unknown:
1991 fprintf(stderr, "erresc: unknown csi ");
1992 csidump();
1993 /* die(""); */
1994 break;
1995 case '@': /* ICH -- Insert <n> blank char */
1996 DEFAULT(csiescseq.arg[0], 1);
1997 tinsertblank(csiescseq.arg[0]);
1998 break;
1999 case 'A': /* CUU -- Cursor <n> Up */
2000 DEFAULT(csiescseq.arg[0], 1);
2001 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
2002 break;
2003 case 'B': /* CUD -- Cursor <n> Down */
2004 case 'e': /* VPR --Cursor <n> Down */
2005 DEFAULT(csiescseq.arg[0], 1);
2006 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
2007 break;
2008 case 'i': /* MC -- Media Copy */
2009 switch(csiescseq.arg[0]) {
2010 case 0:
2011 tdump();
2012 break;
2013 case 1:
2014 tdumpline(term.c.y);
2015 break;
2016 case 2:
2017 tdumpsel();
2018 break;
2019 case 4:
2020 term.mode &= ~MODE_PRINT;
2021 break;
2022 case 5:
2023 term.mode |= MODE_PRINT;
2024 break;
2025 }
2026 break;
2027 case 'c': /* DA -- Device Attributes */
2028 if(csiescseq.arg[0] == 0)
2029 ttywrite(vtiden, sizeof(vtiden) - 1);
2030 break;
2031 case 'C': /* CUF -- Cursor <n> Forward */
2032 case 'a': /* HPR -- Cursor <n> Forward */
2033 DEFAULT(csiescseq.arg[0], 1);
2034 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
2035 break;
2036 case 'D': /* CUB -- Cursor <n> Backward */
2037 DEFAULT(csiescseq.arg[0], 1);
2038 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
2039 break;
2040 case 'E': /* CNL -- Cursor <n> Down and first col */
2041 DEFAULT(csiescseq.arg[0], 1);
2042 tmoveto(0, term.c.y+csiescseq.arg[0]);
2043 break;
2044 case 'F': /* CPL -- Cursor <n> Up and first col */
2045 DEFAULT(csiescseq.arg[0], 1);
2046 tmoveto(0, term.c.y-csiescseq.arg[0]);
2047 break;
2048 case 'g': /* TBC -- Tabulation clear */
2049 switch(csiescseq.arg[0]) {
2050 case 0: /* clear current tab stop */
2051 term.tabs[term.c.x] = 0;
2052 break;
2053 case 3: /* clear all the tabs */
2054 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2055 break;
2056 default:
2057 goto unknown;
2058 }
2059 break;
2060 case 'G': /* CHA -- Move to <col> */
2061 case '`': /* HPA */
2062 DEFAULT(csiescseq.arg[0], 1);
2063 tmoveto(csiescseq.arg[0]-1, term.c.y);
2064 break;
2065 case 'H': /* CUP -- Move to <row> <col> */
2066 case 'f': /* HVP */
2067 DEFAULT(csiescseq.arg[0], 1);
2068 DEFAULT(csiescseq.arg[1], 1);
2069 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2070 break;
2071 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2072 DEFAULT(csiescseq.arg[0], 1);
2073 tputtab(csiescseq.arg[0]);
2074 break;
2075 case 'J': /* ED -- Clear screen */
2076 selclear(NULL);
2077 switch(csiescseq.arg[0]) {
2078 case 0: /* below */
2079 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2080 if(term.c.y < term.row-1) {
2081 tclearregion(0, term.c.y+1, term.col-1,
2082 term.row-1);
2083 }
2084 break;
2085 case 1: /* above */
2086 if(term.c.y > 1)
2087 tclearregion(0, 0, term.col-1, term.c.y-1);
2088 tclearregion(0, term.c.y, term.c.x, term.c.y);
2089 break;
2090 case 2: /* all */
2091 tclearregion(0, 0, term.col-1, term.row-1);
2092 break;
2093 default:
2094 goto unknown;
2095 }
2096 break;
2097 case 'K': /* EL -- Clear line */
2098 switch(csiescseq.arg[0]) {
2099 case 0: /* right */
2100 tclearregion(term.c.x, term.c.y, term.col-1,
2101 term.c.y);
2102 break;
2103 case 1: /* left */
2104 tclearregion(0, term.c.y, term.c.x, term.c.y);
2105 break;
2106 case 2: /* all */
2107 tclearregion(0, term.c.y, term.col-1, term.c.y);
2108 break;
2109 }
2110 break;
2111 case 'S': /* SU -- Scroll <n> line up */
2112 DEFAULT(csiescseq.arg[0], 1);
2113 tscrollup(term.top, csiescseq.arg[0]);
2114 break;
2115 case 'T': /* SD -- Scroll <n> line down */
2116 DEFAULT(csiescseq.arg[0], 1);
2117 tscrolldown(term.top, csiescseq.arg[0]);
2118 break;
2119 case 'L': /* IL -- Insert <n> blank lines */
2120 DEFAULT(csiescseq.arg[0], 1);
2121 tinsertblankline(csiescseq.arg[0]);
2122 break;
2123 case 'l': /* RM -- Reset Mode */
2124 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2125 break;
2126 case 'M': /* DL -- Delete <n> lines */
2127 DEFAULT(csiescseq.arg[0], 1);
2128 tdeleteline(csiescseq.arg[0]);
2129 break;
2130 case 'X': /* ECH -- Erase <n> char */
2131 DEFAULT(csiescseq.arg[0], 1);
2132 tclearregion(term.c.x, term.c.y,
2133 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2134 break;
2135 case 'P': /* DCH -- Delete <n> char */
2136 DEFAULT(csiescseq.arg[0], 1);
2137 tdeletechar(csiescseq.arg[0]);
2138 break;
2139 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2140 DEFAULT(csiescseq.arg[0], 1);
2141 tputtab(-csiescseq.arg[0]);
2142 break;
2143 case 'd': /* VPA -- Move to <row> */
2144 DEFAULT(csiescseq.arg[0], 1);
2145 tmoveato(term.c.x, csiescseq.arg[0]-1);
2146 break;
2147 case 'h': /* SM -- Set terminal mode */
2148 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2149 break;
2150 case 'm': /* SGR -- Terminal attribute (color) */
2151 tsetattr(csiescseq.arg, csiescseq.narg);
2152 break;
2153 case 'n': /* DSR – Device Status Report (cursor position) */
2154 if (csiescseq.arg[0] == 6) {
2155 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2156 term.c.y+1, term.c.x+1);
2157 ttywrite(buf, len);
2158 }
2159 break;
2160 case 'r': /* DECSTBM -- Set Scrolling Region */
2161 if(csiescseq.priv) {
2162 goto unknown;
2163 } else {
2164 DEFAULT(csiescseq.arg[0], 1);
2165 DEFAULT(csiescseq.arg[1], term.row);
2166 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2167 tmoveato(0, 0);
2168 }
2169 break;
2170 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2171 tcursor(CURSOR_SAVE);
2172 break;
2173 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2174 tcursor(CURSOR_LOAD);
2175 break;
2176 }
2177 }
2178
2179 void
2180 csidump(void) {
2181 int i;
2182 uint c;
2183
2184 printf("ESC[");
2185 for(i = 0; i < csiescseq.len; i++) {
2186 c = csiescseq.buf[i] & 0xff;
2187 if(isprint(c)) {
2188 putchar(c);
2189 } else if(c == '\n') {
2190 printf("(\\n)");
2191 } else if(c == '\r') {
2192 printf("(\\r)");
2193 } else if(c == 0x1b) {
2194 printf("(\\e)");
2195 } else {
2196 printf("(%02x)", c);
2197 }
2198 }
2199 putchar('\n');
2200 }
2201
2202 void
2203 csireset(void) {
2204 memset(&csiescseq, 0, sizeof(csiescseq));
2205 }
2206
2207 void
2208 strhandle(void) {
2209 char *p = NULL;
2210 int j, narg, par;
2211
2212 term.esc &= ~(ESC_STR_END|ESC_STR);
2213 strparse();
2214 narg = strescseq.narg;
2215 par = atoi(strescseq.args[0]);
2216
2217 switch(strescseq.type) {
2218 case ']': /* OSC -- Operating System Command */
2219 switch(par) {
2220 case 0:
2221 case 1:
2222 case 2:
2223 if(narg > 1)
2224 xsettitle(strescseq.args[1]);
2225 return;
2226 case 4: /* color set */
2227 if(narg < 3)
2228 break;
2229 p = strescseq.args[2];
2230 /* FALLTHROUGH */
2231 case 104: /* color reset, here p = NULL */
2232 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2233 if(xsetcolorname(j, p)) {
2234 fprintf(stderr, "erresc: invalid color %s\n", p);
2235 } else {
2236 /*
2237 * TODO if defaultbg color is changed, borders
2238 * are dirty
2239 */
2240 redraw();
2241 }
2242 return;
2243 }
2244 break;
2245 case 'k': /* old title set compatibility */
2246 xsettitle(strescseq.args[0]);
2247 return;
2248 case 'P': /* DCS -- Device Control String */
2249 case '_': /* APC -- Application Program Command */
2250 case '^': /* PM -- Privacy Message */
2251 return;
2252 }
2253
2254 fprintf(stderr, "erresc: unknown str ");
2255 strdump();
2256 }
2257
2258 void
2259 strparse(void) {
2260 char *p = strescseq.buf;
2261
2262 strescseq.narg = 0;
2263 strescseq.buf[strescseq.len] = '\0';
2264 while(p && strescseq.narg < STR_ARG_SIZ)
2265 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2266 }
2267
2268 void
2269 strdump(void) {
2270 int i;
2271 uint c;
2272
2273 printf("ESC%c", strescseq.type);
2274 for(i = 0; i < strescseq.len; i++) {
2275 c = strescseq.buf[i] & 0xff;
2276 if(c == '\0') {
2277 return;
2278 } else if(isprint(c)) {
2279 putchar(c);
2280 } else if(c == '\n') {
2281 printf("(\\n)");
2282 } else if(c == '\r') {
2283 printf("(\\r)");
2284 } else if(c == 0x1b) {
2285 printf("(\\e)");
2286 } else {
2287 printf("(%02x)", c);
2288 }
2289 }
2290 printf("ESC\\\n");
2291 }
2292
2293 void
2294 strreset(void) {
2295 memset(&strescseq, 0, sizeof(strescseq));
2296 }
2297
2298 void
2299 tprinter(char *s, size_t len) {
2300 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2301 fprintf(stderr, "Error writing in %s:%s\n",
2302 opt_io, strerror(errno));
2303 close(iofd);
2304 iofd = -1;
2305 }
2306 }
2307
2308 void
2309 toggleprinter(const Arg *arg) {
2310 term.mode ^= MODE_PRINT;
2311 }
2312
2313 void
2314 printscreen(const Arg *arg) {
2315 tdump();
2316 }
2317
2318 void
2319 printsel(const Arg *arg) {
2320 tdumpsel();
2321 }
2322
2323 void
2324 tdumpsel(void) {
2325 char *ptr;
2326
2327 if((ptr = getsel())) {
2328 tprinter(ptr, strlen(ptr));
2329 free(ptr);
2330 }
2331 }
2332
2333 void
2334 tdumpline(int n) {
2335 Glyph *bp, *end;
2336
2337 bp = &term.line[n][0];
2338 end = &bp[MIN(tlinelen(n), term.col) - 1];
2339 if(bp != end || bp->c[0] != ' ') {
2340 for( ;bp <= end; ++bp)
2341 tprinter(bp->c, utf8len(bp->c));
2342 }
2343 tprinter("\n", 1);
2344 }
2345
2346 void
2347 tdump(void) {
2348 int i;
2349
2350 for(i = 0; i < term.row; ++i)
2351 tdumpline(i);
2352 }
2353
2354 void
2355 tputtab(int n) {
2356 uint x = term.c.x;
2357
2358 if(n > 0) {
2359 while(x < term.col && n--)
2360 for(++x; x < term.col && !term.tabs[x]; ++x)
2361 /* nothing */ ;
2362 } else if(n < 0) {
2363 while(x > 0 && n++)
2364 for(--x; x > 0 && !term.tabs[x]; --x)
2365 /* nothing */ ;
2366 }
2367 tmoveto(x, term.c.y);
2368 }
2369
2370 void
2371 techo(char *buf, int len) {
2372 for(; len > 0; buf++, len--) {
2373 char c = *buf;
2374
2375 if(ISCONTROL((uchar) c)) { /* control code */
2376 if(c & 0x80) {
2377 c &= 0x7f;
2378 tputc("^", 1);
2379 tputc("[", 1);
2380 } else if(c != '\n' && c != '\r' && c != '\t') {
2381 c ^= 0x40;
2382 tputc("^", 1);
2383 }
2384 tputc(&c, 1);
2385 } else {
2386 break;
2387 }
2388 }
2389 if(len)
2390 tputc(buf, len);
2391 }
2392
2393 void
2394 tdeftran(char ascii) {
2395 static char cs[] = "0B";
2396 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2397 char *p;
2398
2399 if((p = strchr(cs, ascii)) == NULL) {
2400 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2401 } else {
2402 term.trantbl[term.icharset] = vcs[p - cs];
2403 }
2404 }
2405
2406 void
2407 tdectest(char c) {
2408 static char E[UTF_SIZ] = "E";
2409 int x, y;
2410
2411 if(c == '8') { /* DEC screen alignment test. */
2412 for(x = 0; x < term.col; ++x) {
2413 for(y = 0; y < term.row; ++y)
2414 tsetchar(E, &term.c.attr, x, y);
2415 }
2416 }
2417 }
2418
2419 void
2420 tstrsequence(uchar c) {
2421 if (c & 0x80) {
2422 switch (c) {
2423 case 0x90: /* DCS -- Device Control String */
2424 c = 'P';
2425 break;
2426 case 0x9f: /* APC -- Application Program Command */
2427 c = '_';
2428 break;
2429 case 0x9e: /* PM -- Privacy Message */
2430 c = '^';
2431 break;
2432 case 0x9d: /* OSC -- Operating System Command */
2433 c = ']';
2434 break;
2435 }
2436 }
2437 strreset();
2438 strescseq.type = c;
2439 term.esc |= ESC_STR;
2440 return;
2441 }
2442
2443 void
2444 tcontrolcode(uchar ascii) {
2445 static char question[UTF_SIZ] = "?";
2446
2447 switch(ascii) {
2448 case '\t': /* HT */
2449 tputtab(1);
2450 return;
2451 case '\b': /* BS */
2452 tmoveto(term.c.x-1, term.c.y);
2453 return;
2454 case '\r': /* CR */
2455 tmoveto(0, term.c.y);
2456 return;
2457 case '\f': /* LF */
2458 case '\v': /* VT */
2459 case '\n': /* LF */
2460 /* go to first col if the mode is set */
2461 tnewline(IS_SET(MODE_CRLF));
2462 return;
2463 case '\a': /* BEL */
2464 if(term.esc & ESC_STR_END) {
2465 /* backwards compatibility to xterm */
2466 strhandle();
2467 } else {
2468 if(!(xw.state & WIN_FOCUSED))
2469 xseturgency(1);
2470 if (bellvolume)
2471 XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
2472 }
2473 break;
2474 case '\033': /* ESC */
2475 csireset();
2476 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2477 term.esc |= ESC_START;
2478 return;
2479 case '\016': /* SO (LS1 -- Locking shift 1) */
2480 case '\017': /* SI (LS0 -- Locking shift 0) */
2481 term.charset = 1 - (ascii - '\016');
2482 return;
2483 case '\032': /* SUB */
2484 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2485 case '\030': /* CAN */
2486 csireset();
2487 break;
2488 case '\005': /* ENQ (IGNORED) */
2489 case '\000': /* NUL (IGNORED) */
2490 case '\021': /* XON (IGNORED) */
2491 case '\023': /* XOFF (IGNORED) */
2492 case 0177: /* DEL (IGNORED) */
2493 return;
2494 case 0x84: /* TODO: IND */
2495 break;
2496 case 0x85: /* NEL -- Next line */
2497 tnewline(1); /* always go to first col */
2498 break;
2499 case 0x88: /* HTS -- Horizontal tab stop */
2500 term.tabs[term.c.x] = 1;
2501 break;
2502 case 0x8d: /* TODO: RI */
2503 case 0x8e: /* TODO: SS2 */
2504 case 0x8f: /* TODO: SS3 */
2505 case 0x98: /* TODO: SOS */
2506 break;
2507 case 0x9a: /* DECID -- Identify Terminal */
2508 ttywrite(vtiden, sizeof(vtiden) - 1);
2509 break;
2510 case 0x9b: /* TODO: CSI */
2511 case 0x9c: /* TODO: ST */
2512 break;
2513 case 0x90: /* DCS -- Device Control String */
2514 case 0x9f: /* APC -- Application Program Command */
2515 case 0x9e: /* PM -- Privacy Message */
2516 case 0x9d: /* OSC -- Operating System Command */
2517 tstrsequence(ascii);
2518 return;
2519 }
2520 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2521 term.esc &= ~(ESC_STR_END|ESC_STR);
2522 return;
2523 }
2524
2525 /*
2526 * returns 1 when the sequence is finished and it hasn't to read
2527 * more characters for this sequence, otherwise 0
2528 */
2529 int
2530 eschandle(uchar ascii) {
2531 switch(ascii) {
2532 case '[':
2533 term.esc |= ESC_CSI;
2534 return 0;
2535 case '#':
2536 term.esc |= ESC_TEST;
2537 return 0;
2538 case 'P': /* DCS -- Device Control String */
2539 case '_': /* APC -- Application Program Command */
2540 case '^': /* PM -- Privacy Message */
2541 case ']': /* OSC -- Operating System Command */
2542 case 'k': /* old title set compatibility */
2543 tstrsequence(ascii);
2544 return 0;
2545 case 'n': /* LS2 -- Locking shift 2 */
2546 case 'o': /* LS3 -- Locking shift 3 */
2547 term.charset = 2 + (ascii - 'n');
2548 break;
2549 case '(': /* GZD4 -- set primary charset G0 */
2550 case ')': /* G1D4 -- set secondary charset G1 */
2551 case '*': /* G2D4 -- set tertiary charset G2 */
2552 case '+': /* G3D4 -- set quaternary charset G3 */
2553 term.icharset = ascii - '(';
2554 term.esc |= ESC_ALTCHARSET;
2555 return 0;
2556 case 'D': /* IND -- Linefeed */
2557 if(term.c.y == term.bot) {
2558 tscrollup(term.top, 1);
2559 } else {
2560 tmoveto(term.c.x, term.c.y+1);
2561 }
2562 break;
2563 case 'E': /* NEL -- Next line */
2564 tnewline(1); /* always go to first col */
2565 break;
2566 case 'H': /* HTS -- Horizontal tab stop */
2567 term.tabs[term.c.x] = 1;
2568 break;
2569 case 'M': /* RI -- Reverse index */
2570 if(term.c.y == term.top) {
2571 tscrolldown(term.top, 1);
2572 } else {
2573 tmoveto(term.c.x, term.c.y-1);
2574 }
2575 break;
2576 case 'Z': /* DECID -- Identify Terminal */
2577 ttywrite(vtiden, sizeof(vtiden) - 1);
2578 break;
2579 case 'c': /* RIS -- Reset to inital state */
2580 treset();
2581 xresettitle();
2582 xloadcols();
2583 break;
2584 case '=': /* DECPAM -- Application keypad */
2585 term.mode |= MODE_APPKEYPAD;
2586 break;
2587 case '>': /* DECPNM -- Normal keypad */
2588 term.mode &= ~MODE_APPKEYPAD;
2589 break;
2590 case '7': /* DECSC -- Save Cursor */
2591 tcursor(CURSOR_SAVE);
2592 break;
2593 case '8': /* DECRC -- Restore Cursor */
2594 tcursor(CURSOR_LOAD);
2595 break;
2596 case '\\': /* ST -- String Terminator */
2597 if(term.esc & ESC_STR_END)
2598 strhandle();
2599 break;
2600 default:
2601 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2602 (uchar) ascii, isprint(ascii)? ascii:'.');
2603 break;
2604 }
2605 return 1;
2606 }
2607
2608 void
2609 tputc(char *c, int len) {
2610 uchar ascii;
2611 bool control;
2612 long unicodep;
2613 int width;
2614 Glyph *gp;
2615
2616 if(len == 1) {
2617 width = 1;
2618 unicodep = ascii = *c;
2619 } else {
2620 utf8decode(c, &unicodep, UTF_SIZ);
2621 if ((width = wcwidth(unicodep)) == -1) {
2622 c = "\357\277\275"; /* UTF_INVALID */
2623 width = 1;
2624 }
2625 control = ISCONTROLC1(unicodep);
2626 ascii = unicodep;
2627 }
2628
2629 if(IS_SET(MODE_PRINT))
2630 tprinter(c, len);
2631 control = ISCONTROL(unicodep);
2632
2633 /*
2634 * STR sequence must be checked before anything else
2635 * because it uses all following characters until it
2636 * receives a ESC, a SUB, a ST or any other C1 control
2637 * character.
2638 */
2639 if(term.esc & ESC_STR) {
2640 if(width == 1 &&
2641 (ascii == '\a' || ascii == 030 ||
2642 ascii == 032 || ascii == 033 ||
2643 ISCONTROLC1(unicodep))) {
2644 term.esc &= ~(ESC_START|ESC_STR);
2645 term.esc |= ESC_STR_END;
2646 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2647 memmove(&strescseq.buf[strescseq.len], c, len);
2648 strescseq.len += len;
2649 return;
2650 } else {
2651 /*
2652 * Here is a bug in terminals. If the user never sends
2653 * some code to stop the str or esc command, then st
2654 * will stop responding. But this is better than
2655 * silently failing with unknown characters. At least
2656 * then users will report back.
2657 *
2658 * In the case users ever get fixed, here is the code:
2659 */
2660 /*
2661 * term.esc = 0;
2662 * strhandle();
2663 */
2664 return;
2665 }
2666 }
2667
2668 /*
2669 * Actions of control codes must be performed as soon they arrive
2670 * because they can be embedded inside a control sequence, and
2671 * they must not cause conflicts with sequences.
2672 */
2673 if(control) {
2674 tcontrolcode(ascii);
2675 /*
2676 * control codes are not shown ever
2677 */
2678 return;
2679 } else if(term.esc & ESC_START) {
2680 if(term.esc & ESC_CSI) {
2681 csiescseq.buf[csiescseq.len++] = ascii;
2682 if(BETWEEN(ascii, 0x40, 0x7E)
2683 || csiescseq.len >= \
2684 sizeof(csiescseq.buf)-1) {
2685 term.esc = 0;
2686 csiparse();
2687 csihandle();
2688 }
2689 return;
2690 } else if(term.esc & ESC_ALTCHARSET) {
2691 tdeftran(ascii);
2692 } else if(term.esc & ESC_TEST) {
2693 tdectest(ascii);
2694 } else {
2695 if (!eschandle(ascii))
2696 return;
2697 /* sequence already finished */
2698 }
2699 term.esc = 0;
2700 /*
2701 * All characters which form part of a sequence are not
2702 * printed
2703 */
2704 return;
2705 }
2706 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2707 selclear(NULL);
2708
2709 gp = &term.line[term.c.y][term.c.x];
2710 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2711 gp->mode |= ATTR_WRAP;
2712 tnewline(1);
2713 gp = &term.line[term.c.y][term.c.x];
2714 }
2715
2716 if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2717 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2718
2719 if(term.c.x+width > term.col) {
2720 tnewline(1);
2721 gp = &term.line[term.c.y][term.c.x];
2722 }
2723
2724 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2725
2726 if(width == 2) {
2727 gp->mode |= ATTR_WIDE;
2728 if(term.c.x+1 < term.col) {
2729 gp[1].c[0] = '\0';
2730 gp[1].mode = ATTR_WDUMMY;
2731 }
2732 }
2733 if(term.c.x+width < term.col) {
2734 tmoveto(term.c.x+width, term.c.y);
2735 } else {
2736 term.c.state |= CURSOR_WRAPNEXT;
2737 }
2738 }
2739
2740 void
2741 tresize(int col, int row) {
2742 int i;
2743 int minrow = MIN(row, term.row);
2744 int mincol = MIN(col, term.col);
2745 int slide = term.c.y - row + 1;
2746 bool *bp;
2747 TCursor c;
2748
2749 if(col < 1 || row < 1) {
2750 fprintf(stderr,
2751 "tresize: error resizing to %dx%d\n", col, row);
2752 return;
2753 }
2754
2755 /* free unneeded rows */
2756 i = 0;
2757 if(slide > 0) {
2758 /*
2759 * slide screen to keep cursor where we expect it -
2760 * tscrollup would work here, but we can optimize to
2761 * memmove because we're freeing the earlier lines
2762 */
2763 for(/* i = 0 */; i < slide; i++) {
2764 free(term.line[i]);
2765 free(term.alt[i]);
2766 }
2767 memmove(term.line, term.line + slide, row * sizeof(Line));
2768 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2769 }
2770 for(i += row; i < term.row; i++) {
2771 free(term.line[i]);
2772 free(term.alt[i]);
2773 }
2774
2775 /* resize to new height */
2776 term.line = xrealloc(term.line, row * sizeof(Line));
2777 term.alt = xrealloc(term.alt, row * sizeof(Line));
2778 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2779 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2780
2781 /* resize each row to new width, zero-pad if needed */
2782 for(i = 0; i < minrow; i++) {
2783 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2784 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2785 }
2786
2787 /* allocate any new rows */
2788 for(/* i == minrow */; i < row; i++) {
2789 term.line[i] = xmalloc(col * sizeof(Glyph));
2790 term.alt[i] = xmalloc(col * sizeof(Glyph));
2791 }
2792 if(col > term.col) {
2793 bp = term.tabs + term.col;
2794
2795 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2796 while(--bp > term.tabs && !*bp)
2797 /* nothing */ ;
2798 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2799 *bp = 1;
2800 }
2801 /* update terminal size */
2802 term.col = col;
2803 term.row = row;
2804 /* reset scrolling region */
2805 tsetscroll(0, row-1);
2806 /* make use of the LIMIT in tmoveto */
2807 tmoveto(term.c.x, term.c.y);
2808 /* Clearing both screens (it makes dirty all lines) */
2809 c = term.c;
2810 for(i = 0; i < 2; i++) {
2811 if(mincol < col && 0 < minrow) {
2812 tclearregion(mincol, 0, col - 1, minrow - 1);
2813 }
2814 if(0 < col && minrow < row) {
2815 tclearregion(0, minrow, col - 1, row - 1);
2816 }
2817 tswapscreen();
2818 tcursor(CURSOR_LOAD);
2819 }
2820 term.c = c;
2821 }
2822
2823 void
2824 xresize(int col, int row) {
2825 xw.tw = MAX(1, col * xw.cw);
2826 xw.th = MAX(1, row * xw.ch);
2827
2828 XFreePixmap(xw.dpy, xw.buf);
2829 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2830 DefaultDepth(xw.dpy, xw.scr));
2831 XftDrawChange(xw.draw, xw.buf);
2832 xclear(0, 0, xw.w, xw.h);
2833 }
2834
2835 static inline ushort
2836 sixd_to_16bit(int x) {
2837 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2838 }
2839
2840 void
2841 xloadcols(void) {
2842 int i;
2843 XRenderColor color = { .alpha = 0xffff };
2844 static bool loaded;
2845 Color *cp;
2846
2847 if(loaded) {
2848 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2849 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2850 }
2851
2852 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2853 for(i = 0; i < LEN(colorname); i++) {
2854 if(!colorname[i])
2855 continue;
2856 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2857 die("Could not allocate color '%s'\n", colorname[i]);
2858 }
2859 }
2860
2861 /* load colors [16-231] ; same colors as xterm */
2862 for(i = 16; i < 6*6*6+16; i++) {
2863 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2864 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2865 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2866 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2867 die("Could not allocate color %d\n", i);
2868 }
2869
2870 /* load colors [232-255] ; grayscale */
2871 for(; i < 256; i++) {
2872 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2873 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2874 die("Could not allocate color %d\n", i);
2875 }
2876 loaded = true;
2877 }
2878
2879 int
2880 xsetcolorname(int x, const char *name) {
2881 XRenderColor color = { .alpha = 0xffff };
2882 Color ncolor;
2883
2884 if(!BETWEEN(x, 0, LEN(colorname)))
2885 return 1;
2886
2887 if(!name) {
2888 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2889 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2890 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2891 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2892 if(!XftColorAllocValue(xw.dpy, xw.vis,
2893 xw.cmap, &color, &ncolor)) {
2894 return 1;
2895 }
2896
2897 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2898 dc.col[x] = ncolor;
2899 return 0;
2900 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2901 color.red = color.green = color.blue = \
2902 0x0808 + 0x0a0a * (x - (16 + 216));
2903 if(!XftColorAllocValue(xw.dpy, xw.vis,
2904 xw.cmap, &color, &ncolor)) {
2905 return 1;
2906 }
2907
2908 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2909 dc.col[x] = ncolor;
2910 return 0;
2911 } else { /* system colors */
2912 name = colorname[x];
2913 }
2914 }
2915 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2916 return 1;
2917
2918 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2919 dc.col[x] = ncolor;
2920 return 0;
2921 }
2922
2923 void
2924 xtermclear(int col1, int row1, int col2, int row2) {
2925 XftDrawRect(xw.draw,
2926 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2927 borderpx + col1 * xw.cw,
2928 borderpx + row1 * xw.ch,
2929 (col2-col1+1) * xw.cw,
2930 (row2-row1+1) * xw.ch);
2931 }
2932
2933 /*
2934 * Absolute coordinates.
2935 */
2936 void
2937 xclear(int x1, int y1, int x2, int y2) {
2938 XftDrawRect(xw.draw,
2939 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2940 x1, y1, x2-x1, y2-y1);
2941 }
2942
2943 void
2944 xhints(void) {
2945 XClassHint class = {opt_class ? opt_class : termname, termname};
2946 XWMHints wm = {.flags = InputHint, .input = 1};
2947 XSizeHints *sizeh = NULL;
2948
2949 sizeh = XAllocSizeHints();
2950
2951 sizeh->flags = PSize | PResizeInc | PBaseSize;
2952 sizeh->height = xw.h;
2953 sizeh->width = xw.w;
2954 sizeh->height_inc = xw.ch;
2955 sizeh->width_inc = xw.cw;
2956 sizeh->base_height = 2 * borderpx;
2957 sizeh->base_width = 2 * borderpx;
2958 if(xw.isfixed == True) {
2959 sizeh->flags |= PMaxSize | PMinSize;
2960 sizeh->min_width = sizeh->max_width = xw.w;
2961 sizeh->min_height = sizeh->max_height = xw.h;
2962 }
2963 if(xw.gm & (XValue|YValue)) {
2964 sizeh->flags |= USPosition | PWinGravity;
2965 sizeh->x = xw.l;
2966 sizeh->y = xw.t;
2967 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2968 }
2969
2970 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2971 &class);
2972 XFree(sizeh);
2973 }
2974
2975 int
2976 xgeommasktogravity(int mask) {
2977 switch(mask & (XNegative|YNegative)) {
2978 case 0:
2979 return NorthWestGravity;
2980 case XNegative:
2981 return NorthEastGravity;
2982 case YNegative:
2983 return SouthWestGravity;
2984 }
2985 return SouthEastGravity;
2986 }
2987
2988 int
2989 xloadfont(Font *f, FcPattern *pattern) {
2990 FcPattern *match;
2991 FcResult result;
2992
2993 match = FcFontMatch(NULL, pattern, &result);
2994 if(!match)
2995 return 1;
2996
2997 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2998 FcPatternDestroy(match);
2999 return 1;
3000 }
3001
3002 f->set = NULL;
3003 f->pattern = FcPatternDuplicate(pattern);
3004
3005 f->ascent = f->match->ascent;
3006 f->descent = f->match->descent;
3007 f->lbearing = 0;
3008 f->rbearing = f->match->max_advance_width;
3009
3010 f->height = f->ascent + f->descent;
3011 f->width = f->lbearing + f->rbearing;
3012
3013 return 0;
3014 }
3015
3016 void
3017 xloadfonts(char *fontstr, double fontsize) {
3018 FcPattern *pattern;
3019 FcResult r_sz, r_psz;
3020 double fontval;
3021 float ceilf(float);
3022
3023 if(fontstr[0] == '-') {
3024 pattern = XftXlfdParse(fontstr, False, False);
3025 } else {
3026 pattern = FcNameParse((FcChar8 *)fontstr);
3027 }
3028
3029 if(!pattern)
3030 die("st: can't open font %s\n", fontstr);
3031
3032 if(fontsize > 1) {
3033 FcPatternDel(pattern, FC_PIXEL_SIZE);
3034 FcPatternDel(pattern, FC_SIZE);
3035 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
3036 usedfontsize = fontsize;
3037 } else {
3038 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
3039 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
3040 if(r_psz == FcResultMatch) {
3041 usedfontsize = fontval;
3042 } else if(r_sz == FcResultMatch) {
3043 usedfontsize = -1;
3044 } else {
3045 /*
3046 * Default font size is 12, if none given. This is to
3047 * have a known usedfontsize value.
3048 */
3049 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
3050 usedfontsize = 12;
3051 }
3052 defaultfontsize = usedfontsize;
3053 }
3054
3055 FcConfigSubstitute(0, pattern, FcMatchPattern);
3056 FcDefaultSubstitute(pattern);
3057
3058 if(xloadfont(&dc.font, pattern))
3059 die("st: can't open font %s\n", fontstr);
3060
3061 if(usedfontsize < 0) {
3062 FcPatternGetDouble(dc.font.match->pattern,
3063 FC_PIXEL_SIZE, 0, &fontval);
3064 usedfontsize = fontval;
3065 if(fontsize == 0)
3066 defaultfontsize = fontval;
3067 }
3068
3069 /* Setting character width and height. */
3070 xw.cw = ceilf(dc.font.width * cwscale);
3071 xw.ch = ceilf(dc.font.height * chscale);
3072
3073 FcPatternDel(pattern, FC_SLANT);
3074 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3075 if(xloadfont(&dc.ifont, pattern))
3076 die("st: can't open font %s\n", fontstr);
3077
3078 FcPatternDel(pattern, FC_WEIGHT);
3079 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3080 if(xloadfont(&dc.ibfont, pattern))
3081 die("st: can't open font %s\n", fontstr);
3082
3083 FcPatternDel(pattern, FC_SLANT);
3084 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3085 if(xloadfont(&dc.bfont, pattern))
3086 die("st: can't open font %s\n", fontstr);
3087
3088 FcPatternDestroy(pattern);
3089 }
3090
3091 int
3092 xloadfontset(Font *f) {
3093 FcResult result;
3094
3095 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3096 return 1;
3097 return 0;
3098 }
3099
3100 void
3101 xunloadfont(Font *f) {
3102 XftFontClose(xw.dpy, f->match);
3103 FcPatternDestroy(f->pattern);
3104 if(f->set)
3105 FcFontSetDestroy(f->set);
3106 }
3107
3108 void
3109 xunloadfonts(void) {
3110 /* Free the loaded fonts in the font cache. */
3111 while(frclen > 0)
3112 XftFontClose(xw.dpy, frc[--frclen].font);
3113
3114 xunloadfont(&dc.font);
3115 xunloadfont(&dc.bfont);
3116 xunloadfont(&dc.ifont);
3117 xunloadfont(&dc.ibfont);
3118 }
3119
3120 void
3121 xzoom(const Arg *arg) {
3122 Arg larg;
3123
3124 larg.i = usedfontsize + arg->i;
3125 xzoomabs(&larg);
3126 }
3127
3128 void
3129 xzoomabs(const Arg *arg) {
3130 xunloadfonts();
3131 xloadfonts(usedfont, arg->i);
3132 cresize(0, 0);
3133 redraw();
3134 xhints();
3135 }
3136
3137 void
3138 xzoomreset(const Arg *arg) {
3139 Arg larg;
3140
3141 if(defaultfontsize > 0) {
3142 larg.i = defaultfontsize;
3143 xzoomabs(&larg);
3144 }
3145 }
3146
3147 void
3148 xinit(void) {
3149 XGCValues gcvalues;
3150 Cursor cursor;
3151 Window parent;
3152 pid_t thispid = getpid();
3153
3154 if(!(xw.dpy = XOpenDisplay(NULL)))
3155 die("Can't open display\n");
3156 xw.scr = XDefaultScreen(xw.dpy);
3157 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3158
3159 /* font */
3160 if(!FcInit())
3161 die("Could not init fontconfig.\n");
3162
3163 usedfont = (opt_font == NULL)? font : opt_font;
3164 xloadfonts(usedfont, 0);
3165
3166 /* colors */
3167 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3168 xloadcols();
3169
3170 /* adjust fixed window geometry */
3171 xw.w = 2 * borderpx + term.col * xw.cw;
3172 xw.h = 2 * borderpx + term.row * xw.ch;
3173 if(xw.gm & XNegative)
3174 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3175 if(xw.gm & YNegative)
3176 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3177
3178 /* Events */
3179 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3180 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3181 xw.attrs.bit_gravity = NorthWestGravity;
3182 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3183 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3184 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3185 xw.attrs.colormap = xw.cmap;
3186
3187 if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
3188 parent = XRootWindow(xw.dpy, xw.scr);
3189 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3190 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3191 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3192 | CWEventMask | CWColormap, &xw.attrs);
3193
3194 memset(&gcvalues, 0, sizeof(gcvalues));
3195 gcvalues.graphics_exposures = False;
3196 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3197 &gcvalues);
3198 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3199 DefaultDepth(xw.dpy, xw.scr));
3200 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3201 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3202
3203 /* Xft rendering context */
3204 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3205
3206 /* input methods */
3207 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3208 XSetLocaleModifiers("@im=local");
3209 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3210 XSetLocaleModifiers("@im=");
3211 if((xw.xim = XOpenIM(xw.dpy,
3212 NULL, NULL, NULL)) == NULL) {
3213 die("XOpenIM failed. Could not open input"
3214 " device.\n");
3215 }
3216 }
3217 }
3218 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3219 | XIMStatusNothing, XNClientWindow, xw.win,
3220 XNFocusWindow, xw.win, NULL);
3221 if(xw.xic == NULL)
3222 die("XCreateIC failed. Could not obtain input method.\n");
3223
3224 /* white cursor, black outline */
3225 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3226 XDefineCursor(xw.dpy, xw.win, cursor);
3227 XRecolorCursor(xw.dpy, cursor,
3228 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3229 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3230
3231 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3232 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3233 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3234 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3235
3236 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3237 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3238 PropModeReplace, (uchar *)&thispid, 1);
3239
3240 xresettitle();
3241 XMapWindow(xw.dpy, xw.win);
3242 xhints();
3243 XSync(xw.dpy, False);
3244 }
3245
3246 void
3247 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3248 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3249 width = charlen * xw.cw, xp, i;
3250 int frcflags, charexists;
3251 int u8fl, u8fblen, u8cblen, doesexist;
3252 char *u8c, *u8fs;
3253 long unicodep;
3254 Font *font = &dc.font;
3255 FcResult fcres;
3256 FcPattern *fcpattern, *fontpattern;
3257 FcFontSet *fcsets[] = { NULL };
3258 FcCharSet *fccharset;
3259 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3260 XRenderColor colfg, colbg;
3261 XRectangle r;
3262 int oneatatime;
3263
3264 frcflags = FRC_NORMAL;
3265
3266 if(base.mode & ATTR_ITALIC) {
3267 if(base.fg == defaultfg)
3268 base.fg = defaultitalic;
3269 font = &dc.ifont;
3270 frcflags = FRC_ITALIC;
3271 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3272 if(base.fg == defaultfg)
3273 base.fg = defaultitalic;
3274 font = &dc.ibfont;
3275 frcflags = FRC_ITALICBOLD;
3276 } else if(base.mode & ATTR_UNDERLINE) {
3277 if(base.fg == defaultfg)
3278 base.fg = defaultunderline;
3279 }
3280
3281 if(IS_TRUECOL(base.fg)) {
3282 colfg.alpha = 0xffff;
3283 colfg.red = TRUERED(base.fg);
3284 colfg.green = TRUEGREEN(base.fg);
3285 colfg.blue = TRUEBLUE(base.fg);
3286 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3287 fg = &truefg;
3288 } else {
3289 fg = &dc.col[base.fg];
3290 }
3291
3292 if(IS_TRUECOL(base.bg)) {
3293 colbg.alpha = 0xffff;
3294 colbg.green = TRUEGREEN(base.bg);
3295 colbg.red = TRUERED(base.bg);
3296 colbg.blue = TRUEBLUE(base.bg);
3297 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3298 bg = &truebg;
3299 } else {
3300 bg = &dc.col[base.bg];
3301 }
3302
3303 if(base.mode & ATTR_BOLD) {
3304 /*
3305 * change basic system colors [0-7]
3306 * to bright system colors [8-15]
3307 */
3308 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3309 fg = &dc.col[base.fg + 8];
3310
3311 if(base.mode & ATTR_ITALIC) {
3312 font = &dc.ibfont;
3313 frcflags = FRC_ITALICBOLD;
3314 } else {
3315 font = &dc.bfont;
3316 frcflags = FRC_BOLD;
3317 }
3318 }
3319
3320 if(IS_SET(MODE_REVERSE)) {
3321 if(fg == &dc.col[defaultfg]) {
3322 fg = &dc.col[defaultbg];
3323 } else {
3324 colfg.red = ~fg->color.red;
3325 colfg.green = ~fg->color.green;
3326 colfg.blue = ~fg->color.blue;
3327 colfg.alpha = fg->color.alpha;
3328 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3329 &revfg);
3330 fg = &revfg;
3331 }
3332
3333 if(bg == &dc.col[defaultbg]) {
3334 bg = &dc.col[defaultfg];
3335 } else {
3336 colbg.red = ~bg->color.red;
3337 colbg.green = ~bg->color.green;
3338 colbg.blue = ~bg->color.blue;
3339 colbg.alpha = bg->color.alpha;
3340 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3341 &revbg);
3342 bg = &revbg;
3343 }
3344 }
3345
3346 if(base.mode & ATTR_REVERSE) {
3347 temp = fg;
3348 fg = bg;
3349 bg = temp;
3350 }
3351
3352 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3353 colfg.red = fg->color.red / 2;
3354 colfg.green = fg->color.green / 2;
3355 colfg.blue = fg->color.blue / 2;
3356 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3357 fg = &revfg;
3358 }
3359
3360 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3361 fg = bg;
3362
3363 if(base.mode & ATTR_INVISIBLE)
3364 fg = bg;
3365
3366 /* Intelligent cleaning up of the borders. */
3367 if(x == 0) {
3368 xclear(0, (y == 0)? 0 : winy, borderpx,
3369 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3370 }
3371 if(x + charlen >= term.col) {
3372 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3373 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3374 }
3375 if(y == 0)
3376 xclear(winx, 0, winx + width, borderpx);
3377 if(y == term.row-1)
3378 xclear(winx, winy + xw.ch, winx + width, xw.h);
3379
3380 /* Clean up the region we want to draw to. */
3381 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3382
3383 /* Set the clip region because Xft is sometimes dirty. */
3384 r.x = 0;
3385 r.y = 0;
3386 r.height = xw.ch;
3387 r.width = width;
3388 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3389
3390 for(xp = winx; bytelen > 0;) {
3391 /*
3392 * Search for the range in the to be printed string of glyphs
3393 * that are in the main font. Then print that range. If
3394 * some glyph is found that is not in the font, do the
3395 * fallback dance.
3396 */
3397 u8fs = s;
3398 u8fblen = 0;
3399 u8fl = 0;
3400 oneatatime = font->width != xw.cw;
3401 for(;;) {
3402 u8c = s;
3403 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3404 s += u8cblen;
3405 bytelen -= u8cblen;
3406
3407 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3408 if(doesexist) {
3409 u8fl++;
3410 u8fblen += u8cblen;
3411 if(!oneatatime && bytelen > 0)
3412 continue;
3413 }
3414
3415 if(u8fl > 0) {
3416 XftDrawStringUtf8(xw.draw, fg,
3417 font->match, xp,
3418 winy + font->ascent,
3419 (FcChar8 *)u8fs,
3420 u8fblen);
3421 xp += xw.cw * u8fl;
3422 }
3423 break;
3424 }
3425 if(doesexist) {
3426 if(oneatatime)
3427 continue;
3428 break;
3429 }
3430
3431 /* Search the font cache. */
3432 for(i = 0; i < frclen; i++) {
3433 charexists = XftCharExists(xw.dpy, frc[i].font, unicodep);
3434 /* Everything correct. */
3435 if(charexists && frc[i].flags == frcflags)
3436 break;
3437 /* We got a default font for a not found glyph. */
3438 if(!charexists && frc[i].flags == frcflags \
3439 && frc[i].unicodep == unicodep) {
3440 break;
3441 }
3442 }
3443
3444 /* Nothing was found. */
3445 if(i >= frclen) {
3446 if(!font->set)
3447 xloadfontset(font);
3448 fcsets[0] = font->set;
3449
3450 /*
3451 * Nothing was found in the cache. Now use
3452 * some dozen of Fontconfig calls to get the
3453 * font for one single character.
3454 *
3455 * Xft and fontconfig are design failures.
3456 */
3457 fcpattern = FcPatternDuplicate(font->pattern);
3458 fccharset = FcCharSetCreate();
3459
3460 FcCharSetAddChar(fccharset, unicodep);
3461 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3462 fccharset);
3463 FcPatternAddBool(fcpattern, FC_SCALABLE,
3464 FcTrue);
3465
3466 FcConfigSubstitute(0, fcpattern,
3467 FcMatchPattern);
3468 FcDefaultSubstitute(fcpattern);
3469
3470 fontpattern = FcFontSetMatch(0, fcsets, 1,
3471 fcpattern, &fcres);
3472
3473 /*
3474 * Overwrite or create the new cache entry.
3475 */
3476 if(frclen >= LEN(frc)) {
3477 frclen = LEN(frc) - 1;
3478 XftFontClose(xw.dpy, frc[frclen].font);
3479 frc[frclen].unicodep = 0;
3480 }
3481
3482 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3483 fontpattern);
3484 frc[frclen].flags = frcflags;
3485 frc[frclen].unicodep = unicodep;
3486
3487 i = frclen;
3488 frclen++;
3489
3490 FcPatternDestroy(fcpattern);
3491 FcCharSetDestroy(fccharset);
3492 }
3493
3494 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3495 xp, winy + frc[i].font->ascent,
3496 (FcChar8 *)u8c, u8cblen);
3497
3498 xp += xw.cw * wcwidth(unicodep);
3499 }
3500
3501 /*
3502 * This is how the loop above actually should be. Why does the
3503 * application have to care about font details?
3504 *
3505 * I have to repeat: Xft and Fontconfig are design failures.
3506 */
3507 /*
3508 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3509 winy + font->ascent, (FcChar8 *)s, bytelen);
3510 */
3511
3512 if(base.mode & ATTR_UNDERLINE) {
3513 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3514 width, 1);
3515 }
3516
3517 if(base.mode & ATTR_STRUCK) {
3518 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3519 width, 1);
3520 }
3521
3522 /* Reset clip to none. */
3523 XftDrawSetClip(xw.draw, 0);
3524 }
3525
3526 void
3527 xdrawcursor(void) {
3528 static int oldx = 0, oldy = 0;
3529 int sl, width, curx;
3530 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3531
3532 LIMIT(oldx, 0, term.col-1);
3533 LIMIT(oldy, 0, term.row-1);
3534
3535 curx = term.c.x;
3536
3537 /* adjust position if in dummy */
3538 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3539 oldx--;
3540 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3541 curx--;
3542
3543 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3544
3545 /* remove the old cursor */
3546 sl = utf8len(term.line[oldy][oldx].c);
3547 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3548 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3549 oldy, width, sl);
3550
3551 if(IS_SET(MODE_HIDE))
3552 return;
3553
3554 /* draw the new one */
3555 if(xw.state & WIN_FOCUSED) {
3556 if(IS_SET(MODE_REVERSE)) {
3557 g.mode |= ATTR_REVERSE;
3558 g.fg = defaultcs;
3559 g.bg = defaultfg;
3560 }
3561
3562 sl = utf8len(g.c);
3563 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3564 ? 2 : 1;
3565 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3566 } else {
3567 XftDrawRect(xw.draw, &dc.col[defaultcs],
3568 borderpx + curx * xw.cw,
3569 borderpx + term.c.y * xw.ch,
3570 xw.cw - 1, 1);
3571 XftDrawRect(xw.draw, &dc.col[defaultcs],
3572 borderpx + curx * xw.cw,
3573 borderpx + term.c.y * xw.ch,
3574 1, xw.ch - 1);
3575 XftDrawRect(xw.draw, &dc.col[defaultcs],
3576 borderpx + (curx + 1) * xw.cw - 1,
3577 borderpx + term.c.y * xw.ch,
3578 1, xw.ch - 1);
3579 XftDrawRect(xw.draw, &dc.col[defaultcs],
3580 borderpx + curx * xw.cw,
3581 borderpx + (term.c.y + 1) * xw.ch - 1,
3582 xw.cw, 1);
3583 }
3584 oldx = curx, oldy = term.c.y;
3585 }
3586
3587
3588 void
3589 xsettitle(char *p) {
3590 XTextProperty prop;
3591
3592 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3593 &prop);
3594 XSetWMName(xw.dpy, xw.win, &prop);
3595 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3596 XFree(prop.value);
3597 }
3598
3599 void
3600 xresettitle(void) {
3601 xsettitle(opt_title ? opt_title : "st");
3602 }
3603
3604 void
3605 redraw(void) {
3606 tfulldirt();
3607 draw();
3608 }
3609
3610 void
3611 draw(void) {
3612 drawregion(0, 0, term.col, term.row);
3613 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3614 xw.h, 0, 0);
3615 XSetForeground(xw.dpy, dc.gc,
3616 dc.col[IS_SET(MODE_REVERSE)?
3617 defaultfg : defaultbg].pixel);
3618 }
3619
3620 void
3621 drawregion(int x1, int y1, int x2, int y2) {
3622 int ic, ib, x, y, ox, sl;
3623 Glyph base, new;
3624 char buf[DRAW_BUF_SIZ];
3625 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3626 long unicodep;
3627
3628 if(!(xw.state & WIN_VISIBLE))
3629 return;
3630
3631 for(y = y1; y < y2; y++) {
3632 if(!term.dirty[y])
3633 continue;
3634
3635 xtermclear(0, y, term.col, y);
3636 term.dirty[y] = 0;
3637 base = term.line[y][0];
3638 ic = ib = ox = 0;
3639 for(x = x1; x < x2; x++) {
3640 new = term.line[y][x];
3641 if(new.mode == ATTR_WDUMMY)
3642 continue;
3643 if(ena_sel && selected(x, y))
3644 new.mode ^= ATTR_REVERSE;
3645 if(ib > 0 && (ATTRCMP(base, new)
3646 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3647 xdraws(buf, base, ox, y, ic, ib);
3648 ic = ib = 0;
3649 }
3650 if(ib == 0) {
3651 ox = x;
3652 base = new;
3653 }
3654
3655 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3656 memcpy(buf+ib, new.c, sl);
3657 ib += sl;
3658 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3659 }
3660 if(ib > 0)
3661 xdraws(buf, base, ox, y, ic, ib);
3662 }
3663 xdrawcursor();
3664 }
3665
3666 void
3667 expose(XEvent *ev) {
3668 XExposeEvent *e = &ev->xexpose;
3669
3670 if(xw.state & WIN_REDRAW) {
3671 if(!e->count)
3672 xw.state &= ~WIN_REDRAW;
3673 }
3674 redraw();
3675 }
3676
3677 void
3678 visibility(XEvent *ev) {
3679 XVisibilityEvent *e = &ev->xvisibility;
3680
3681 if(e->state == VisibilityFullyObscured) {
3682 xw.state &= ~WIN_VISIBLE;
3683 } else if(!(xw.state & WIN_VISIBLE)) {
3684 /* need a full redraw for next Expose, not just a buf copy */
3685 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3686 }
3687 }
3688
3689 void
3690 unmap(XEvent *ev) {
3691 xw.state &= ~WIN_VISIBLE;
3692 }
3693
3694 void
3695 xsetpointermotion(int set) {
3696 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3697 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3698 }
3699
3700 void
3701 xseturgency(int add) {
3702 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3703
3704 MODBIT(h->flags, add, XUrgencyHint);
3705 XSetWMHints(xw.dpy, xw.win, h);
3706 XFree(h);
3707 }
3708
3709 void
3710 focus(XEvent *ev) {
3711 XFocusChangeEvent *e = &ev->xfocus;
3712
3713 if(e->mode == NotifyGrab)
3714 return;
3715
3716 if(ev->type == FocusIn) {
3717 XSetICFocus(xw.xic);
3718 xw.state |= WIN_FOCUSED;
3719 xseturgency(0);
3720 if(IS_SET(MODE_FOCUS))
3721 ttywrite("\033[I", 3);
3722 } else {
3723 XUnsetICFocus(xw.xic);
3724 xw.state &= ~WIN_FOCUSED;
3725 if(IS_SET(MODE_FOCUS))
3726 ttywrite("\033[O", 3);
3727 }
3728 }
3729
3730 static inline bool
3731 match(uint mask, uint state) {
3732 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3733 }
3734
3735 void
3736 numlock(const Arg *dummy) {
3737 term.numlock ^= 1;
3738 }
3739
3740 char*
3741 kmap(KeySym k, uint state) {
3742 Key *kp;
3743 int i;
3744
3745 /* Check for mapped keys out of X11 function keys. */
3746 for(i = 0; i < LEN(mappedkeys); i++) {
3747 if(mappedkeys[i] == k)
3748 break;
3749 }
3750 if(i == LEN(mappedkeys)) {
3751 if((k & 0xFFFF) < 0xFD00)
3752 return NULL;
3753 }
3754
3755 for(kp = key; kp < key + LEN(key); kp++) {
3756 if(kp->k != k)
3757 continue;
3758
3759 if(!match(kp->mask, state))
3760 continue;
3761
3762 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3763 continue;
3764 if(term.numlock && kp->appkey == 2)
3765 continue;
3766
3767 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3768 continue;
3769
3770 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3771 continue;
3772
3773 return kp->s;
3774 }
3775
3776 return NULL;
3777 }
3778
3779 void
3780 kpress(XEvent *ev) {
3781 XKeyEvent *e = &ev->xkey;
3782 KeySym ksym;
3783 char buf[32], *customkey;
3784 int len;
3785 long c;
3786 Status status;
3787 Shortcut *bp;
3788
3789 if(IS_SET(MODE_KBDLOCK))
3790 return;
3791
3792 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3793 /* 1. shortcuts */
3794 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3795 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3796 bp->func(&(bp->arg));
3797 return;
3798 }
3799 }
3800
3801 /* 2. custom keys from config.h */
3802 if((customkey = kmap(ksym, e->state))) {
3803 ttysend(customkey, strlen(customkey));
3804 return;
3805 }
3806
3807 /* 3. composed string from input method */
3808 if(len == 0)
3809 return;
3810 if(len == 1 && e->state & Mod1Mask) {
3811 if(IS_SET(MODE_8BIT)) {
3812 if(*buf < 0177) {
3813 c = *buf | 0x80;
3814 len = utf8encode(c, buf, UTF_SIZ);
3815 }
3816 } else {
3817 buf[1] = buf[0];
3818 buf[0] = '\033';
3819 len = 2;
3820 }
3821 }
3822 ttysend(buf, len);
3823 }
3824
3825
3826 void
3827 cmessage(XEvent *e) {
3828 /*
3829 * See xembed specs
3830 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3831 */
3832 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3833 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3834 xw.state |= WIN_FOCUSED;
3835 xseturgency(0);
3836 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3837 xw.state &= ~WIN_FOCUSED;
3838 }
3839 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3840 /* Send SIGHUP to shell */
3841 kill(pid, SIGHUP);
3842 exit(EXIT_SUCCESS);
3843 }
3844 }
3845
3846 void
3847 cresize(int width, int height) {
3848 int col, row;
3849
3850 if(width != 0)
3851 xw.w = width;
3852 if(height != 0)
3853 xw.h = height;
3854
3855 col = (xw.w - 2 * borderpx) / xw.cw;
3856 row = (xw.h - 2 * borderpx) / xw.ch;
3857
3858 tresize(col, row);
3859 xresize(col, row);
3860 ttyresize();
3861 }
3862
3863 void
3864 resize(XEvent *e) {
3865 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3866 return;
3867
3868 cresize(e->xconfigure.width, e->xconfigure.height);
3869 }
3870
3871 void
3872 run(void) {
3873 XEvent ev;
3874 int w = xw.w, h = xw.h;
3875 fd_set rfd;
3876 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3877 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3878 long deltatime;
3879
3880 /* Waiting for window mapping */
3881 while(1) {
3882 XNextEvent(xw.dpy, &ev);
3883 if(XFilterEvent(&ev, None))
3884 continue;
3885 if(ev.type == ConfigureNotify) {
3886 w = ev.xconfigure.width;
3887 h = ev.xconfigure.height;
3888 } else if(ev.type == MapNotify) {
3889 break;
3890 }
3891 }
3892
3893 ttynew();
3894 cresize(w, h);
3895
3896 clock_gettime(CLOCK_MONOTONIC, &last);
3897 lastblink = last;
3898
3899 for(xev = actionfps;;) {
3900 FD_ZERO(&rfd);
3901 FD_SET(cmdfd, &rfd);
3902 FD_SET(xfd, &rfd);
3903
3904 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3905 if(errno == EINTR)
3906 continue;
3907 die("select failed: %s\n", strerror(errno));
3908 }
3909 if(FD_ISSET(cmdfd, &rfd)) {
3910 ttyread();
3911 if(blinktimeout) {
3912 blinkset = tattrset(ATTR_BLINK);
3913 if(!blinkset)
3914 MODBIT(term.mode, 0, MODE_BLINK);
3915 }
3916 }
3917
3918 if(FD_ISSET(xfd, &rfd))
3919 xev = actionfps;
3920
3921 clock_gettime(CLOCK_MONOTONIC, &now);
3922 drawtimeout.tv_sec = 0;
3923 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3924 tv = &drawtimeout;
3925
3926 dodraw = 0;
3927 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3928 tsetdirtattr(ATTR_BLINK);
3929 term.mode ^= MODE_BLINK;
3930 lastblink = now;
3931 dodraw = 1;
3932 }
3933 deltatime = TIMEDIFF(now, last);
3934 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3935 || deltatime < 0) {
3936 dodraw = 1;
3937 last = now;
3938 }
3939
3940 if(dodraw) {
3941 while(XPending(xw.dpy)) {
3942 XNextEvent(xw.dpy, &ev);
3943 if(XFilterEvent(&ev, None))
3944 continue;
3945 if(handler[ev.type])
3946 (handler[ev.type])(&ev);
3947 }
3948
3949 draw();
3950 XFlush(xw.dpy);
3951
3952 if(xev && !FD_ISSET(xfd, &rfd))
3953 xev--;
3954 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3955 if(blinkset) {
3956 if(TIMEDIFF(now, lastblink) \
3957 > blinktimeout) {
3958 drawtimeout.tv_nsec = 1000;
3959 } else {
3960 drawtimeout.tv_nsec = (1E6 * \
3961 (blinktimeout - \
3962 TIMEDIFF(now,
3963 lastblink)));
3964 }
3965 drawtimeout.tv_sec = \
3966 drawtimeout.tv_nsec / 1E9;
3967 drawtimeout.tv_nsec %= (long)1E9;
3968 } else {
3969 tv = NULL;
3970 }
3971 }
3972 }
3973 }
3974 }
3975
3976 void
3977 usage(void) {
3978 die("%s " VERSION " (c) 2010-2015 st engineers\n" \
3979 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3980 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3981 }
3982
3983 int
3984 main(int argc, char *argv[]) {
3985 char *titles;
3986 uint cols = 80, rows = 24;
3987
3988 xw.l = xw.t = 0;
3989 xw.isfixed = False;
3990
3991 ARGBEGIN {
3992 case 'a':
3993 allowaltscreen = false;
3994 break;
3995 case 'c':
3996 opt_class = EARGF(usage());
3997 break;
3998 case 'e':
3999 /* eat all remaining arguments */
4000 if(argc > 1) {
4001 opt_cmd = &argv[1];
4002 if(argv[1] != NULL && opt_title == NULL) {
4003 titles = xstrdup(argv[1]);
4004 opt_title = basename(titles);
4005 }
4006 }
4007 goto run;
4008 case 'f':
4009 opt_font = EARGF(usage());
4010 break;
4011 case 'g':
4012 xw.gm = XParseGeometry(EARGF(usage()),
4013 &xw.l, &xw.t, &cols, &rows);
4014 break;
4015 case 'i':
4016 xw.isfixed = True;
4017 break;
4018 case 'o':
4019 opt_io = EARGF(usage());
4020 break;
4021 case 't':
4022 opt_title = EARGF(usage());
4023 break;
4024 case 'w':
4025 opt_embed = EARGF(usage());
4026 break;
4027 case 'v':
4028 default:
4029 usage();
4030 } ARGEND;
4031
4032 run:
4033 setlocale(LC_CTYPE, "");
4034 XSetLocaleModifiers("");
4035 tnew(cols? cols : 1, rows? rows : 1);
4036 xinit();
4037 selinit();
4038 run();
4039
4040 return 0;
4041 }
4042