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Implementing xzoomreset.
[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 <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a)[0])
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
74 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
75 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
80 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
81
82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
83 #define IS_TRUECOL(x) (1 << 24 & (x))
84 #define TRUERED(x) (((x) & 0xff0000) >> 8)
85 #define TRUEGREEN(x) (((x) & 0xff00))
86 #define TRUEBLUE(x) (((x) & 0xff) << 8)
87
88
89 enum glyph_attribute {
90 ATTR_NULL = 0,
91 ATTR_BOLD = 1 << 0,
92 ATTR_FAINT = 1 << 1,
93 ATTR_ITALIC = 1 << 2,
94 ATTR_UNDERLINE = 1 << 3,
95 ATTR_BLINK = 1 << 4,
96 ATTR_REVERSE = 1 << 5,
97 ATTR_INVISIBLE = 1 << 6,
98 ATTR_STRUCK = 1 << 7,
99 ATTR_WRAP = 1 << 8,
100 ATTR_WIDE = 1 << 9,
101 ATTR_WDUMMY = 1 << 10,
102 };
103
104 enum cursor_movement {
105 CURSOR_SAVE,
106 CURSOR_LOAD
107 };
108
109 enum cursor_state {
110 CURSOR_DEFAULT = 0,
111 CURSOR_WRAPNEXT = 1,
112 CURSOR_ORIGIN = 2
113 };
114
115 enum term_mode {
116 MODE_WRAP = 1 << 0,
117 MODE_INSERT = 1 << 1,
118 MODE_APPKEYPAD = 1 << 2,
119 MODE_ALTSCREEN = 1 << 3,
120 MODE_CRLF = 1 << 4,
121 MODE_MOUSEBTN = 1 << 5,
122 MODE_MOUSEMOTION = 1 << 6,
123 MODE_REVERSE = 1 << 7,
124 MODE_KBDLOCK = 1 << 8,
125 MODE_HIDE = 1 << 9,
126 MODE_ECHO = 1 << 10,
127 MODE_APPCURSOR = 1 << 11,
128 MODE_MOUSESGR = 1 << 12,
129 MODE_8BIT = 1 << 13,
130 MODE_BLINK = 1 << 14,
131 MODE_FBLINK = 1 << 15,
132 MODE_FOCUS = 1 << 16,
133 MODE_MOUSEX10 = 1 << 17,
134 MODE_MOUSEMANY = 1 << 18,
135 MODE_BRCKTPASTE = 1 << 19,
136 MODE_PRINT = 1 << 20,
137 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
138 |MODE_MOUSEMANY,
139 };
140
141 enum charset {
142 CS_GRAPHIC0,
143 CS_GRAPHIC1,
144 CS_UK,
145 CS_USA,
146 CS_MULTI,
147 CS_GER,
148 CS_FIN
149 };
150
151 enum escape_state {
152 ESC_START = 1,
153 ESC_CSI = 2,
154 ESC_STR = 4, /* DCS, OSC, PM, APC */
155 ESC_ALTCHARSET = 8,
156 ESC_STR_END = 16, /* a final string was encountered */
157 ESC_TEST = 32, /* Enter in test mode */
158 };
159
160 enum window_state {
161 WIN_VISIBLE = 1,
162 WIN_REDRAW = 2,
163 WIN_FOCUSED = 4
164 };
165
166 enum selection_type {
167 SEL_REGULAR = 1,
168 SEL_RECTANGULAR = 2
169 };
170
171 enum selection_snap {
172 SNAP_WORD = 1,
173 SNAP_LINE = 2
174 };
175
176 typedef unsigned char uchar;
177 typedef unsigned int uint;
178 typedef unsigned long ulong;
179 typedef unsigned short ushort;
180
181 typedef XftDraw *Draw;
182 typedef XftColor Color;
183
184 typedef struct {
185 char c[UTF_SIZ]; /* character code */
186 ushort mode; /* attribute flags */
187 uint32_t fg; /* foreground */
188 uint32_t bg; /* background */
189 } Glyph;
190
191 typedef Glyph *Line;
192
193 typedef struct {
194 Glyph attr; /* current char attributes */
195 int x;
196 int y;
197 char state;
198 } TCursor;
199
200 /* CSI Escape sequence structs */
201 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
202 typedef struct {
203 char buf[ESC_BUF_SIZ]; /* raw string */
204 int len; /* raw string length */
205 char priv;
206 int arg[ESC_ARG_SIZ];
207 int narg; /* nb of args */
208 char mode;
209 } CSIEscape;
210
211 /* STR Escape sequence structs */
212 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
213 typedef struct {
214 char type; /* ESC type ... */
215 char buf[STR_BUF_SIZ]; /* raw string */
216 int len; /* raw string length */
217 char *args[STR_ARG_SIZ];
218 int narg; /* nb of args */
219 } STREscape;
220
221 /* Internal representation of the screen */
222 typedef struct {
223 int row; /* nb row */
224 int col; /* nb col */
225 Line *line; /* screen */
226 Line *alt; /* alternate screen */
227 bool *dirty; /* dirtyness of lines */
228 TCursor c; /* cursor */
229 int top; /* top scroll limit */
230 int bot; /* bottom scroll limit */
231 int mode; /* terminal mode flags */
232 int esc; /* escape state flags */
233 char trantbl[4]; /* charset table translation */
234 int charset; /* current charset */
235 int icharset; /* selected charset for sequence */
236 bool numlock; /* lock numbers in keyboard */
237 bool *tabs;
238 } Term;
239
240 /* Purely graphic info */
241 typedef struct {
242 Display *dpy;
243 Colormap cmap;
244 Window win;
245 Drawable buf;
246 Atom xembed, wmdeletewin, netwmname, netwmpid;
247 XIM xim;
248 XIC xic;
249 Draw draw;
250 Visual *vis;
251 XSetWindowAttributes attrs;
252 int scr;
253 bool isfixed; /* is fixed geometry? */
254 int l, t; /* left and top offset */
255 int gm; /* geometry mask */
256 int tw, th; /* tty width and height */
257 int w, h; /* window width and height */
258 int ch; /* char height */
259 int cw; /* char width */
260 char state; /* focus, redraw, visible */
261 } XWindow;
262
263 typedef struct {
264 uint b;
265 uint mask;
266 char *s;
267 } Mousekey;
268
269 typedef struct {
270 KeySym k;
271 uint mask;
272 char *s;
273 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
274 signed char appkey; /* application keypad */
275 signed char appcursor; /* application cursor */
276 signed char crlf; /* crlf mode */
277 } Key;
278
279 typedef struct {
280 int mode;
281 int type;
282 int snap;
283 /*
284 * Selection variables:
285 * nb – normalized coordinates of the beginning of the selection
286 * ne – normalized coordinates of the end of the selection
287 * ob – original coordinates of the beginning of the selection
288 * oe – original coordinates of the end of the selection
289 */
290 struct {
291 int x, y;
292 } nb, ne, ob, oe;
293
294 char *clip;
295 Atom xtarget;
296 bool alt;
297 struct timespec tclick1;
298 struct timespec tclick2;
299 } Selection;
300
301 typedef union {
302 int i;
303 uint ui;
304 float f;
305 const void *v;
306 } Arg;
307
308 typedef struct {
309 uint mod;
310 KeySym keysym;
311 void (*func)(const Arg *);
312 const Arg arg;
313 } Shortcut;
314
315 /* function definitions used in config.h */
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(int);
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 [SelectionClear] = selclear,
484 [SelectionNotify] = selnotify,
485 [SelectionRequest] = selrequest,
486 };
487
488 /* Globals */
489 static DC dc;
490 static XWindow xw;
491 static Term term;
492 static CSIEscape csiescseq;
493 static STREscape strescseq;
494 static int cmdfd;
495 static pid_t pid;
496 static Selection sel;
497 static int iofd = STDOUT_FILENO;
498 static char **opt_cmd = NULL;
499 static char *opt_io = NULL;
500 static char *opt_title = NULL;
501 static char *opt_embed = NULL;
502 static char *opt_class = NULL;
503 static char *opt_font = NULL;
504 static int oldbutton = 3; /* button event on startup: 3 = release */
505
506 static char *usedfont = NULL;
507 static double usedfontsize = 0;
508 static double defaultfontsize = 0;
509
510 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
511 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
512 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
513 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
514
515 /* Font Ring Cache */
516 enum {
517 FRC_NORMAL,
518 FRC_ITALIC,
519 FRC_BOLD,
520 FRC_ITALICBOLD
521 };
522
523 typedef struct {
524 XftFont *font;
525 int flags;
526 } Fontcache;
527
528 /* Fontcache is an array now. A new font will be appended to the array. */
529 static Fontcache frc[16];
530 static int frclen = 0;
531
532 ssize_t
533 xwrite(int fd, const char *s, size_t len) {
534 size_t aux = len;
535
536 while(len > 0) {
537 ssize_t r = write(fd, s, len);
538 if(r < 0)
539 return r;
540 len -= r;
541 s += r;
542 }
543 return aux;
544 }
545
546 void *
547 xmalloc(size_t len) {
548 void *p = malloc(len);
549
550 if(!p)
551 die("Out of memory\n");
552
553 return p;
554 }
555
556 void *
557 xrealloc(void *p, size_t len) {
558 if((p = realloc(p, len)) == NULL)
559 die("Out of memory\n");
560
561 return p;
562 }
563
564 char *
565 xstrdup(char *s) {
566 if((s = strdup(s)) == NULL)
567 die("Out of memory\n");
568
569 return s;
570 }
571
572 size_t
573 utf8decode(char *c, long *u, size_t clen) {
574 size_t i, j, len, type;
575 long udecoded;
576
577 *u = UTF_INVALID;
578 if(!clen)
579 return 0;
580 udecoded = utf8decodebyte(c[0], &len);
581 if(!BETWEEN(len, 1, UTF_SIZ))
582 return 1;
583 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
584 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
585 if(type != 0)
586 return j;
587 }
588 if(j < len)
589 return 0;
590 *u = udecoded;
591 utf8validate(u, len);
592 return len;
593 }
594
595 long
596 utf8decodebyte(char c, size_t *i) {
597 for(*i = 0; *i < LEN(utfmask); ++(*i))
598 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
599 return (uchar)c & ~utfmask[*i];
600 return 0;
601 }
602
603 size_t
604 utf8encode(long u, char *c, size_t clen) {
605 size_t len, i;
606
607 len = utf8validate(&u, 0);
608 if(clen < len)
609 return 0;
610 for(i = len - 1; i != 0; --i) {
611 c[i] = utf8encodebyte(u, 0);
612 u >>= 6;
613 }
614 c[0] = utf8encodebyte(u, len);
615 return len;
616 }
617
618 char
619 utf8encodebyte(long u, size_t i) {
620 return utfbyte[i] | (u & ~utfmask[i]);
621 }
622
623 size_t
624 utf8len(char *c) {
625 return utf8decode(c, &(long){0}, UTF_SIZ);
626 }
627
628 size_t
629 utf8validate(long *u, size_t i) {
630 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
631 *u = UTF_INVALID;
632 for(i = 1; *u > utfmax[i]; ++i)
633 ;
634 return i;
635 }
636
637 static void
638 selinit(void) {
639 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
640 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
641 sel.mode = 0;
642 sel.ob.x = -1;
643 sel.clip = NULL;
644 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
645 if(sel.xtarget == None)
646 sel.xtarget = XA_STRING;
647 }
648
649 static int
650 x2col(int x) {
651 x -= borderpx;
652 x /= xw.cw;
653
654 return LIMIT(x, 0, term.col-1);
655 }
656
657 static int
658 y2row(int y) {
659 y -= borderpx;
660 y /= xw.ch;
661
662 return LIMIT(y, 0, term.row-1);
663 }
664
665 static int tlinelen(int y) {
666 int i = term.col;
667
668 if(term.line[y][i - 1].mode & ATTR_WRAP)
669 return i;
670
671 while(i > 0 && term.line[y][i - 1].c[0] == ' ')
672 --i;
673
674 return i;
675 }
676
677 static void
678 selnormalize(void) {
679 int i;
680
681 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
682 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
683 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
684 } else {
685 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
686 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
687 }
688 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
689 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
690
691 selsnap(sel.snap, &sel.nb.x, &sel.nb.y, -1);
692 selsnap(sel.snap, &sel.ne.x, &sel.ne.y, +1);
693
694 /* expand selection over line breaks */
695 if (sel.type == SEL_RECTANGULAR)
696 return;
697 i = tlinelen(sel.nb.y);
698 if (i < sel.nb.x)
699 sel.nb.x = i;
700 if (tlinelen(sel.ne.y) <= sel.ne.x)
701 sel.ne.x = term.col - 1;
702 }
703
704 static inline bool
705 selected(int x, int y) {
706 if(sel.type == SEL_RECTANGULAR)
707 return BETWEEN(y, sel.nb.y, sel.ne.y)
708 && BETWEEN(x, sel.nb.x, sel.ne.x);
709
710 return BETWEEN(y, sel.nb.y, sel.ne.y)
711 && (y != sel.nb.y || x >= sel.nb.x)
712 && (y != sel.ne.y || x <= sel.ne.x);
713 }
714
715 void
716 selsnap(int mode, int *x, int *y, int direction) {
717 int newx, newy, xt, yt;
718 bool delim, prevdelim;
719 Glyph *gp, *prevgp;
720
721 switch(mode) {
722 case SNAP_WORD:
723 /*
724 * Snap around if the word wraps around at the end or
725 * beginning of a line.
726 */
727 prevgp = &term.line[*y][*x];
728 prevdelim = strchr(worddelimiters, prevgp->c[0]) != NULL;
729 for(;;) {
730 newx = *x + direction;
731 newy = *y;
732 if(!BETWEEN(newx, 0, term.col - 1)) {
733 newy += direction;
734 newx = (newx + term.col) % term.col;
735 if (!BETWEEN(newy, 0, term.row - 1))
736 break;
737
738 if(direction > 0)
739 yt = *y, xt = *x;
740 else
741 yt = newy, xt = newx;
742 if(!(term.line[yt][xt].mode & ATTR_WRAP))
743 break;
744 }
745
746 if (newx >= tlinelen(newy))
747 break;
748
749 gp = &term.line[newy][newx];
750 delim = strchr(worddelimiters, gp->c[0]) != NULL;
751 if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
752 || (delim && gp->c[0] != prevgp->c[0])))
753 break;
754
755 *x = newx;
756 *y = newy;
757 prevgp = gp;
758 prevdelim = delim;
759 }
760 break;
761 case SNAP_LINE:
762 /*
763 * Snap around if the the previous line or the current one
764 * has set ATTR_WRAP at its end. Then the whole next or
765 * previous line will be selected.
766 */
767 *x = (direction < 0) ? 0 : term.col - 1;
768 if(direction < 0 && *y > 0) {
769 for(; *y > 0; *y += direction) {
770 if(!(term.line[*y-1][term.col-1].mode
771 & ATTR_WRAP)) {
772 break;
773 }
774 }
775 } else if(direction > 0 && *y < term.row-1) {
776 for(; *y < term.row; *y += direction) {
777 if(!(term.line[*y][term.col-1].mode
778 & ATTR_WRAP)) {
779 break;
780 }
781 }
782 }
783 break;
784 }
785 }
786
787 void
788 getbuttoninfo(XEvent *e) {
789 int type;
790 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
791
792 sel.alt = IS_SET(MODE_ALTSCREEN);
793
794 sel.oe.x = x2col(e->xbutton.x);
795 sel.oe.y = y2row(e->xbutton.y);
796 selnormalize();
797
798 sel.type = SEL_REGULAR;
799 for(type = 1; type < LEN(selmasks); ++type) {
800 if(match(selmasks[type], state)) {
801 sel.type = type;
802 break;
803 }
804 }
805 }
806
807 void
808 mousereport(XEvent *e) {
809 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
810 button = e->xbutton.button, state = e->xbutton.state,
811 len;
812 char buf[40];
813 static int ox, oy;
814
815 /* from urxvt */
816 if(e->xbutton.type == MotionNotify) {
817 if(x == ox && y == oy)
818 return;
819 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
820 return;
821 /* MOUSE_MOTION: no reporting if no button is pressed */
822 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
823 return;
824
825 button = oldbutton + 32;
826 ox = x;
827 oy = y;
828 } else {
829 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
830 button = 3;
831 } else {
832 button -= Button1;
833 if(button >= 3)
834 button += 64 - 3;
835 }
836 if(e->xbutton.type == ButtonPress) {
837 oldbutton = button;
838 ox = x;
839 oy = y;
840 } else if(e->xbutton.type == ButtonRelease) {
841 oldbutton = 3;
842 /* MODE_MOUSEX10: no button release reporting */
843 if(IS_SET(MODE_MOUSEX10))
844 return;
845 if (button == 64 || button == 65)
846 return;
847 }
848 }
849
850 if(!IS_SET(MODE_MOUSEX10)) {
851 button += (state & ShiftMask ? 4 : 0)
852 + (state & Mod4Mask ? 8 : 0)
853 + (state & ControlMask ? 16 : 0);
854 }
855
856 len = 0;
857 if(IS_SET(MODE_MOUSESGR)) {
858 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
859 button, x+1, y+1,
860 e->xbutton.type == ButtonRelease ? 'm' : 'M');
861 } else if(x < 223 && y < 223) {
862 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
863 32+button, 32+x+1, 32+y+1);
864 } else {
865 return;
866 }
867
868 ttywrite(buf, len);
869 }
870
871 void
872 bpress(XEvent *e) {
873 struct timespec now;
874 Mousekey *mk;
875
876 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
877 mousereport(e);
878 return;
879 }
880
881 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
882 if(e->xbutton.button == mk->b
883 && match(mk->mask, e->xbutton.state)) {
884 ttysend(mk->s, strlen(mk->s));
885 return;
886 }
887 }
888
889 if(e->xbutton.button == Button1) {
890 clock_gettime(CLOCK_MONOTONIC, &now);
891
892 /* Clear previous selection, logically and visually. */
893 selclear(NULL);
894 sel.mode = 1;
895 sel.type = SEL_REGULAR;
896 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
897 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
898
899 /*
900 * If the user clicks below predefined timeouts specific
901 * snapping behaviour is exposed.
902 */
903 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
904 sel.snap = SNAP_LINE;
905 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
906 sel.snap = SNAP_WORD;
907 } else {
908 sel.snap = 0;
909 }
910 selnormalize();
911
912 /*
913 * Draw selection, unless it's regular and we don't want to
914 * make clicks visible
915 */
916 if(sel.snap != 0) {
917 sel.mode++;
918 tsetdirt(sel.nb.y, sel.ne.y);
919 }
920 sel.tclick2 = sel.tclick1;
921 sel.tclick1 = now;
922 }
923 }
924
925 char *
926 getsel(void) {
927 char *str, *ptr;
928 int y, bufsize, size, lastx, linelen;
929 Glyph *gp, *last;
930
931 if(sel.ob.x == -1)
932 return NULL;
933
934 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
935 ptr = str = xmalloc(bufsize);
936
937 /* append every set & selected glyph to the selection */
938 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
939 linelen = tlinelen(y);
940
941 if(sel.type == SEL_RECTANGULAR) {
942 gp = &term.line[y][sel.nb.x];
943 lastx = sel.ne.x;
944 } else {
945 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
946 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
947 }
948 last = &term.line[y][MIN(lastx, linelen-1)];
949
950 for( ; gp <= last; ++gp) {
951 if(gp->mode & ATTR_WDUMMY)
952 continue;
953
954 size = utf8len(gp->c);
955 memcpy(ptr, gp->c, size);
956 ptr += size;
957 }
958
959 /*
960 * Copy and pasting of line endings is inconsistent
961 * in the inconsistent terminal and GUI world.
962 * The best solution seems like to produce '\n' when
963 * something is copied from st and convert '\n' to
964 * '\r', when something to be pasted is received by
965 * st.
966 * FIXME: Fix the computer world.
967 */
968 if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
969 *ptr++ = '\n';
970 }
971 *ptr = 0;
972 return str;
973 }
974
975 void
976 selcopy(void) {
977 xsetsel(getsel());
978 }
979
980 void
981 selnotify(XEvent *e) {
982 ulong nitems, ofs, rem;
983 int format;
984 uchar *data, *last, *repl;
985 Atom type;
986
987 ofs = 0;
988 do {
989 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
990 False, AnyPropertyType, &type, &format,
991 &nitems, &rem, &data)) {
992 fprintf(stderr, "Clipboard allocation failed\n");
993 return;
994 }
995
996 /*
997 * As seen in getsel:
998 * Line endings are inconsistent in the terminal and GUI world
999 * copy and pasting. When receiving some selection data,
1000 * replace all '\n' with '\r'.
1001 * FIXME: Fix the computer world.
1002 */
1003 repl = data;
1004 last = data + nitems * format / 8;
1005 while((repl = memchr(repl, '\n', last - repl))) {
1006 *repl++ = '\r';
1007 }
1008
1009 if(IS_SET(MODE_BRCKTPASTE))
1010 ttywrite("\033[200~", 6);
1011 ttysend((char *)data, nitems * format / 8);
1012 if(IS_SET(MODE_BRCKTPASTE))
1013 ttywrite("\033[201~", 6);
1014 XFree(data);
1015 /* number of 32-bit chunks returned */
1016 ofs += nitems * format / 32;
1017 } while(rem > 0);
1018 }
1019
1020 void
1021 selpaste(const Arg *dummy) {
1022 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1023 xw.win, CurrentTime);
1024 }
1025
1026 void
1027 clippaste(const Arg *dummy) {
1028 Atom clipboard;
1029
1030 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1031 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1032 xw.win, CurrentTime);
1033 }
1034
1035 void
1036 selclear(XEvent *e) {
1037 if(sel.ob.x == -1)
1038 return;
1039 sel.ob.x = -1;
1040 tsetdirt(sel.nb.y, sel.ne.y);
1041 }
1042
1043 void
1044 selrequest(XEvent *e) {
1045 XSelectionRequestEvent *xsre;
1046 XSelectionEvent xev;
1047 Atom xa_targets, string;
1048
1049 xsre = (XSelectionRequestEvent *) e;
1050 xev.type = SelectionNotify;
1051 xev.requestor = xsre->requestor;
1052 xev.selection = xsre->selection;
1053 xev.target = xsre->target;
1054 xev.time = xsre->time;
1055 /* reject */
1056 xev.property = None;
1057
1058 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1059 if(xsre->target == xa_targets) {
1060 /* respond with the supported type */
1061 string = sel.xtarget;
1062 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1063 XA_ATOM, 32, PropModeReplace,
1064 (uchar *) &string, 1);
1065 xev.property = xsre->property;
1066 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1067 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1068 xsre->target, 8, PropModeReplace,
1069 (uchar *) sel.clip, strlen(sel.clip));
1070 xev.property = xsre->property;
1071 }
1072
1073 /* all done, send a notification to the listener */
1074 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1075 fprintf(stderr, "Error sending SelectionNotify event\n");
1076 }
1077
1078 void
1079 xsetsel(char *str) {
1080 /* register the selection for both the clipboard and the primary */
1081 Atom clipboard;
1082
1083 free(sel.clip);
1084 sel.clip = str;
1085
1086 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1087
1088 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1089 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1090 }
1091
1092 void
1093 brelease(XEvent *e) {
1094 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1095 mousereport(e);
1096 return;
1097 }
1098
1099 if(e->xbutton.button == Button2) {
1100 selpaste(NULL);
1101 } else if(e->xbutton.button == Button1) {
1102 if(sel.mode < 2) {
1103 selclear(NULL);
1104 } else {
1105 getbuttoninfo(e);
1106 selcopy();
1107 }
1108 sel.mode = 0;
1109 tsetdirt(sel.nb.y, sel.ne.y);
1110 }
1111 }
1112
1113 void
1114 bmotion(XEvent *e) {
1115 int oldey, oldex, oldsby, oldsey;
1116
1117 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1118 mousereport(e);
1119 return;
1120 }
1121
1122 if(!sel.mode)
1123 return;
1124
1125 sel.mode++;
1126 oldey = sel.oe.y;
1127 oldex = sel.oe.x;
1128 oldsby = sel.nb.y;
1129 oldsey = sel.ne.y;
1130 getbuttoninfo(e);
1131
1132 if(oldey != sel.oe.y || oldex != sel.oe.x)
1133 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1134 }
1135
1136 void
1137 die(const char *errstr, ...) {
1138 va_list ap;
1139
1140 va_start(ap, errstr);
1141 vfprintf(stderr, errstr, ap);
1142 va_end(ap);
1143 exit(EXIT_FAILURE);
1144 }
1145
1146 void
1147 execsh(void) {
1148 char **args, *sh;
1149 const struct passwd *pw;
1150 char buf[sizeof(long) * 8 + 1];
1151
1152 errno = 0;
1153 if((pw = getpwuid(getuid())) == NULL) {
1154 if(errno)
1155 die("getpwuid:%s\n", strerror(errno));
1156 else
1157 die("who are you?\n");
1158 }
1159
1160 if (utmp)
1161 sh = utmp;
1162 else if (pw->pw_shell[0])
1163 sh = pw->pw_shell;
1164 else
1165 sh = shell;
1166 args = (opt_cmd) ? opt_cmd : (char *[]){sh, NULL};
1167 snprintf(buf, sizeof(buf), "%lu", xw.win);
1168
1169 unsetenv("COLUMNS");
1170 unsetenv("LINES");
1171 unsetenv("TERMCAP");
1172 setenv("LOGNAME", pw->pw_name, 1);
1173 setenv("USER", pw->pw_name, 1);
1174 setenv("SHELL", args[0], 1);
1175 setenv("HOME", pw->pw_dir, 1);
1176 setenv("TERM", termname, 1);
1177 setenv("WINDOWID", buf, 1);
1178
1179 signal(SIGCHLD, SIG_DFL);
1180 signal(SIGHUP, SIG_DFL);
1181 signal(SIGINT, SIG_DFL);
1182 signal(SIGQUIT, SIG_DFL);
1183 signal(SIGTERM, SIG_DFL);
1184 signal(SIGALRM, SIG_DFL);
1185
1186 execvp(args[0], args);
1187 exit(EXIT_FAILURE);
1188 }
1189
1190 void
1191 sigchld(int a) {
1192 int stat, ret;
1193
1194 if(waitpid(pid, &stat, 0) < 0)
1195 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1196
1197 ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
1198 if (ret != EXIT_SUCCESS)
1199 die("child finished with error '%d'\n", stat);
1200 exit(EXIT_SUCCESS);
1201 }
1202
1203 void
1204 ttynew(void) {
1205 int m, s;
1206 struct winsize w = {term.row, term.col, 0, 0};
1207
1208 /* seems to work fine on linux, openbsd and freebsd */
1209 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1210 die("openpty failed: %s\n", strerror(errno));
1211
1212 switch(pid = fork()) {
1213 case -1:
1214 die("fork failed\n");
1215 break;
1216 case 0:
1217 setsid(); /* create a new process group */
1218 dup2(s, STDIN_FILENO);
1219 dup2(s, STDOUT_FILENO);
1220 dup2(s, STDERR_FILENO);
1221 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1222 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1223 close(s);
1224 close(m);
1225 execsh();
1226 break;
1227 default:
1228 close(s);
1229 cmdfd = m;
1230 signal(SIGCHLD, sigchld);
1231 if(opt_io) {
1232 term.mode |= MODE_PRINT;
1233 iofd = (!strcmp(opt_io, "-")) ?
1234 STDOUT_FILENO :
1235 open(opt_io, O_WRONLY | O_CREAT, 0666);
1236 if(iofd < 0) {
1237 fprintf(stderr, "Error opening %s:%s\n",
1238 opt_io, strerror(errno));
1239 }
1240 }
1241 break;
1242 }
1243 }
1244
1245 void
1246 ttyread(void) {
1247 static char buf[BUFSIZ];
1248 static int buflen = 0;
1249 char *ptr;
1250 char s[UTF_SIZ];
1251 int charsize; /* size of utf8 char in bytes */
1252 long unicodep;
1253 int ret;
1254
1255 /* append read bytes to unprocessed bytes */
1256 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1257 die("Couldn't read from shell: %s\n", strerror(errno));
1258
1259 /* process every complete utf8 char */
1260 buflen += ret;
1261 ptr = buf;
1262 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1263 utf8encode(unicodep, s, UTF_SIZ);
1264 tputc(s, charsize);
1265 ptr += charsize;
1266 buflen -= charsize;
1267 }
1268
1269 /* keep any uncomplete utf8 char for the next call */
1270 memmove(buf, ptr, buflen);
1271 }
1272
1273 void
1274 ttywrite(const char *s, size_t n) {
1275 if(xwrite(cmdfd, s, n) == -1)
1276 die("write error on tty: %s\n", strerror(errno));
1277 }
1278
1279 void
1280 ttysend(char *s, size_t n) {
1281 ttywrite(s, n);
1282 if(IS_SET(MODE_ECHO))
1283 techo(s, n);
1284 }
1285
1286 void
1287 ttyresize(void) {
1288 struct winsize w;
1289
1290 w.ws_row = term.row;
1291 w.ws_col = term.col;
1292 w.ws_xpixel = xw.tw;
1293 w.ws_ypixel = xw.th;
1294 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1295 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1296 }
1297
1298 int
1299 tattrset(int attr) {
1300 int i, j;
1301
1302 for(i = 0; i < term.row-1; i++) {
1303 for(j = 0; j < term.col-1; j++) {
1304 if(term.line[i][j].mode & attr)
1305 return 1;
1306 }
1307 }
1308
1309 return 0;
1310 }
1311
1312 void
1313 tsetdirt(int top, int bot) {
1314 int i;
1315
1316 LIMIT(top, 0, term.row-1);
1317 LIMIT(bot, 0, term.row-1);
1318
1319 for(i = top; i <= bot; i++)
1320 term.dirty[i] = 1;
1321 }
1322
1323 void
1324 tsetdirtattr(int attr) {
1325 int i, j;
1326
1327 for(i = 0; i < term.row-1; i++) {
1328 for(j = 0; j < term.col-1; j++) {
1329 if(term.line[i][j].mode & attr) {
1330 tsetdirt(i, i);
1331 break;
1332 }
1333 }
1334 }
1335 }
1336
1337 void
1338 tfulldirt(void) {
1339 tsetdirt(0, term.row-1);
1340 }
1341
1342 void
1343 tcursor(int mode) {
1344 static TCursor c[2];
1345 bool alt = IS_SET(MODE_ALTSCREEN);
1346
1347 if(mode == CURSOR_SAVE) {
1348 c[alt] = term.c;
1349 } else if(mode == CURSOR_LOAD) {
1350 term.c = c[alt];
1351 tmoveto(c[alt].x, c[alt].y);
1352 }
1353 }
1354
1355 void
1356 treset(void) {
1357 uint i;
1358
1359 term.c = (TCursor){{
1360 .mode = ATTR_NULL,
1361 .fg = defaultfg,
1362 .bg = defaultbg
1363 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1364
1365 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1366 for(i = tabspaces; i < term.col; i += tabspaces)
1367 term.tabs[i] = 1;
1368 term.top = 0;
1369 term.bot = term.row - 1;
1370 term.mode = MODE_WRAP;
1371 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1372 term.charset = 0;
1373
1374 for(i = 0; i < 2; i++) {
1375 tmoveto(0, 0);
1376 tcursor(CURSOR_SAVE);
1377 tclearregion(0, 0, term.col-1, term.row-1);
1378 tswapscreen();
1379 }
1380 }
1381
1382 void
1383 tnew(int col, int row) {
1384 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1385 tresize(col, row);
1386 term.numlock = 1;
1387
1388 treset();
1389 }
1390
1391 void
1392 tswapscreen(void) {
1393 Line *tmp = term.line;
1394
1395 term.line = term.alt;
1396 term.alt = tmp;
1397 term.mode ^= MODE_ALTSCREEN;
1398 tfulldirt();
1399 }
1400
1401 void
1402 tscrolldown(int orig, int n) {
1403 int i;
1404 Line temp;
1405
1406 LIMIT(n, 0, term.bot-orig+1);
1407
1408 tsetdirt(orig, term.bot-n);
1409 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1410
1411 for(i = term.bot; i >= orig+n; i--) {
1412 temp = term.line[i];
1413 term.line[i] = term.line[i-n];
1414 term.line[i-n] = temp;
1415 }
1416
1417 selscroll(orig, n);
1418 }
1419
1420 void
1421 tscrollup(int orig, int n) {
1422 int i;
1423 Line temp;
1424
1425 LIMIT(n, 0, term.bot-orig+1);
1426
1427 tclearregion(0, orig, term.col-1, orig+n-1);
1428 tsetdirt(orig+n, term.bot);
1429
1430 for(i = orig; i <= term.bot-n; i++) {
1431 temp = term.line[i];
1432 term.line[i] = term.line[i+n];
1433 term.line[i+n] = temp;
1434 }
1435
1436 selscroll(orig, -n);
1437 }
1438
1439 void
1440 selscroll(int orig, int n) {
1441 if(sel.ob.x == -1)
1442 return;
1443
1444 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1445 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1446 selclear(NULL);
1447 return;
1448 }
1449 if(sel.type == SEL_RECTANGULAR) {
1450 if(sel.ob.y < term.top)
1451 sel.ob.y = term.top;
1452 if(sel.oe.y > term.bot)
1453 sel.oe.y = term.bot;
1454 } else {
1455 if(sel.ob.y < term.top) {
1456 sel.ob.y = term.top;
1457 sel.ob.x = 0;
1458 }
1459 if(sel.oe.y > term.bot) {
1460 sel.oe.y = term.bot;
1461 sel.oe.x = term.col;
1462 }
1463 }
1464 selnormalize();
1465 }
1466 }
1467
1468 void
1469 tnewline(int first_col) {
1470 int y = term.c.y;
1471
1472 if(y == term.bot) {
1473 tscrollup(term.top, 1);
1474 } else {
1475 y++;
1476 }
1477 tmoveto(first_col ? 0 : term.c.x, y);
1478 }
1479
1480 void
1481 csiparse(void) {
1482 char *p = csiescseq.buf, *np;
1483 long int v;
1484
1485 csiescseq.narg = 0;
1486 if(*p == '?') {
1487 csiescseq.priv = 1;
1488 p++;
1489 }
1490
1491 csiescseq.buf[csiescseq.len] = '\0';
1492 while(p < csiescseq.buf+csiescseq.len) {
1493 np = NULL;
1494 v = strtol(p, &np, 10);
1495 if(np == p)
1496 v = 0;
1497 if(v == LONG_MAX || v == LONG_MIN)
1498 v = -1;
1499 csiescseq.arg[csiescseq.narg++] = v;
1500 p = np;
1501 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1502 break;
1503 p++;
1504 }
1505 csiescseq.mode = *p;
1506 }
1507
1508 /* for absolute user moves, when decom is set */
1509 void
1510 tmoveato(int x, int y) {
1511 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1512 }
1513
1514 void
1515 tmoveto(int x, int y) {
1516 int miny, maxy;
1517
1518 if(term.c.state & CURSOR_ORIGIN) {
1519 miny = term.top;
1520 maxy = term.bot;
1521 } else {
1522 miny = 0;
1523 maxy = term.row - 1;
1524 }
1525 LIMIT(x, 0, term.col-1);
1526 LIMIT(y, miny, maxy);
1527 term.c.state &= ~CURSOR_WRAPNEXT;
1528 term.c.x = x;
1529 term.c.y = y;
1530 }
1531
1532 void
1533 tsetchar(char *c, Glyph *attr, int x, int y) {
1534 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1535 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1536 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1537 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1538 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1539 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1540 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1541 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1542 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1543 };
1544
1545 /*
1546 * The table is proudly stolen from rxvt.
1547 */
1548 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1549 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1550 c = vt100_0[c[0] - 0x41];
1551 }
1552 }
1553
1554 if(term.line[y][x].mode & ATTR_WIDE) {
1555 if(x+1 < term.col) {
1556 term.line[y][x+1].c[0] = ' ';
1557 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1558 }
1559 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1560 term.line[y][x-1].c[0] = ' ';
1561 term.line[y][x-1].mode &= ~ATTR_WIDE;
1562 }
1563
1564 term.dirty[y] = 1;
1565 term.line[y][x] = *attr;
1566 memcpy(term.line[y][x].c, c, UTF_SIZ);
1567 }
1568
1569 void
1570 tclearregion(int x1, int y1, int x2, int y2) {
1571 int x, y, temp;
1572 Glyph *gp;
1573
1574 if(x1 > x2)
1575 temp = x1, x1 = x2, x2 = temp;
1576 if(y1 > y2)
1577 temp = y1, y1 = y2, y2 = temp;
1578
1579 LIMIT(x1, 0, term.col-1);
1580 LIMIT(x2, 0, term.col-1);
1581 LIMIT(y1, 0, term.row-1);
1582 LIMIT(y2, 0, term.row-1);
1583
1584 for(y = y1; y <= y2; y++) {
1585 term.dirty[y] = 1;
1586 for(x = x1; x <= x2; x++) {
1587 gp = &term.line[y][x];
1588 if(selected(x, y))
1589 selclear(NULL);
1590 gp->fg = term.c.attr.fg;
1591 gp->bg = term.c.attr.bg;
1592 gp->mode = 0;
1593 memcpy(gp->c, " ", 2);
1594 }
1595 }
1596 }
1597
1598 void
1599 tdeletechar(int n) {
1600 int dst, src, size;
1601 Glyph *line;
1602
1603 LIMIT(n, 0, term.col - term.c.x);
1604
1605 dst = term.c.x;
1606 src = term.c.x + n;
1607 size = term.col - src;
1608 line = term.line[term.c.y];
1609
1610 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1611 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1612 }
1613
1614 void
1615 tinsertblank(int n) {
1616 int dst, src, size;
1617 Glyph *line;
1618
1619 LIMIT(n, 0, term.col - term.c.x);
1620
1621 dst = term.c.x + n;
1622 src = term.c.x;
1623 size = term.col - dst;
1624 line = term.line[term.c.y];
1625
1626 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1627 tclearregion(src, term.c.y, dst - 1, term.c.y);
1628 }
1629
1630 void
1631 tinsertblankline(int n) {
1632 if(BETWEEN(term.c.y, term.top, term.bot))
1633 tscrolldown(term.c.y, n);
1634 }
1635
1636 void
1637 tdeleteline(int n) {
1638 if(BETWEEN(term.c.y, term.top, term.bot))
1639 tscrollup(term.c.y, n);
1640 }
1641
1642 int32_t
1643 tdefcolor(int *attr, int *npar, int l) {
1644 int32_t idx = -1;
1645 uint r, g, b;
1646
1647 switch (attr[*npar + 1]) {
1648 case 2: /* direct color in RGB space */
1649 if (*npar + 4 >= l) {
1650 fprintf(stderr,
1651 "erresc(38): Incorrect number of parameters (%d)\n",
1652 *npar);
1653 break;
1654 }
1655 r = attr[*npar + 2];
1656 g = attr[*npar + 3];
1657 b = attr[*npar + 4];
1658 *npar += 4;
1659 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1660 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1661 r, g, b);
1662 else
1663 idx = TRUECOLOR(r, g, b);
1664 break;
1665 case 5: /* indexed color */
1666 if (*npar + 2 >= l) {
1667 fprintf(stderr,
1668 "erresc(38): Incorrect number of parameters (%d)\n",
1669 *npar);
1670 break;
1671 }
1672 *npar += 2;
1673 if(!BETWEEN(attr[*npar], 0, 255))
1674 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1675 else
1676 idx = attr[*npar];
1677 break;
1678 case 0: /* implemented defined (only foreground) */
1679 case 1: /* transparent */
1680 case 3: /* direct color in CMY space */
1681 case 4: /* direct color in CMYK space */
1682 default:
1683 fprintf(stderr,
1684 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1685 break;
1686 }
1687
1688 return idx;
1689 }
1690
1691 void
1692 tsetattr(int *attr, int l) {
1693 int i;
1694 int32_t idx;
1695
1696 for(i = 0; i < l; i++) {
1697 switch(attr[i]) {
1698 case 0:
1699 term.c.attr.mode &= ~(
1700 ATTR_BOLD |
1701 ATTR_FAINT |
1702 ATTR_ITALIC |
1703 ATTR_UNDERLINE |
1704 ATTR_BLINK |
1705 ATTR_REVERSE |
1706 ATTR_INVISIBLE |
1707 ATTR_STRUCK );
1708 term.c.attr.fg = defaultfg;
1709 term.c.attr.bg = defaultbg;
1710 break;
1711 case 1:
1712 term.c.attr.mode |= ATTR_BOLD;
1713 break;
1714 case 2:
1715 term.c.attr.mode |= ATTR_FAINT;
1716 break;
1717 case 3:
1718 term.c.attr.mode |= ATTR_ITALIC;
1719 break;
1720 case 4:
1721 term.c.attr.mode |= ATTR_UNDERLINE;
1722 break;
1723 case 5: /* slow blink */
1724 /* FALLTHROUGH */
1725 case 6: /* rapid blink */
1726 term.c.attr.mode |= ATTR_BLINK;
1727 break;
1728 case 7:
1729 term.c.attr.mode |= ATTR_REVERSE;
1730 break;
1731 case 8:
1732 term.c.attr.mode |= ATTR_INVISIBLE;
1733 break;
1734 case 9:
1735 term.c.attr.mode |= ATTR_STRUCK;
1736 break;
1737 case 22:
1738 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1739 break;
1740 case 23:
1741 term.c.attr.mode &= ~ATTR_ITALIC;
1742 break;
1743 case 24:
1744 term.c.attr.mode &= ~ATTR_UNDERLINE;
1745 break;
1746 case 25:
1747 term.c.attr.mode &= ~ATTR_BLINK;
1748 break;
1749 case 27:
1750 term.c.attr.mode &= ~ATTR_REVERSE;
1751 break;
1752 case 28:
1753 term.c.attr.mode &= ~ATTR_INVISIBLE;
1754 break;
1755 case 29:
1756 term.c.attr.mode &= ~ATTR_STRUCK;
1757 break;
1758 case 38:
1759 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1760 term.c.attr.fg = idx;
1761 break;
1762 case 39:
1763 term.c.attr.fg = defaultfg;
1764 break;
1765 case 48:
1766 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1767 term.c.attr.bg = idx;
1768 break;
1769 case 49:
1770 term.c.attr.bg = defaultbg;
1771 break;
1772 default:
1773 if(BETWEEN(attr[i], 30, 37)) {
1774 term.c.attr.fg = attr[i] - 30;
1775 } else if(BETWEEN(attr[i], 40, 47)) {
1776 term.c.attr.bg = attr[i] - 40;
1777 } else if(BETWEEN(attr[i], 90, 97)) {
1778 term.c.attr.fg = attr[i] - 90 + 8;
1779 } else if(BETWEEN(attr[i], 100, 107)) {
1780 term.c.attr.bg = attr[i] - 100 + 8;
1781 } else {
1782 fprintf(stderr,
1783 "erresc(default): gfx attr %d unknown\n",
1784 attr[i]), csidump();
1785 }
1786 break;
1787 }
1788 }
1789 }
1790
1791 void
1792 tsetscroll(int t, int b) {
1793 int temp;
1794
1795 LIMIT(t, 0, term.row-1);
1796 LIMIT(b, 0, term.row-1);
1797 if(t > b) {
1798 temp = t;
1799 t = b;
1800 b = temp;
1801 }
1802 term.top = t;
1803 term.bot = b;
1804 }
1805
1806 void
1807 tsetmode(bool priv, bool set, int *args, int narg) {
1808 int *lim, mode;
1809 bool alt;
1810
1811 for(lim = args + narg; args < lim; ++args) {
1812 if(priv) {
1813 switch(*args) {
1814 case 1: /* DECCKM -- Cursor key */
1815 MODBIT(term.mode, set, MODE_APPCURSOR);
1816 break;
1817 case 5: /* DECSCNM -- Reverse video */
1818 mode = term.mode;
1819 MODBIT(term.mode, set, MODE_REVERSE);
1820 if(mode != term.mode)
1821 redraw(REDRAW_TIMEOUT);
1822 break;
1823 case 6: /* DECOM -- Origin */
1824 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1825 tmoveato(0, 0);
1826 break;
1827 case 7: /* DECAWM -- Auto wrap */
1828 MODBIT(term.mode, set, MODE_WRAP);
1829 break;
1830 case 0: /* Error (IGNORED) */
1831 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1832 case 3: /* DECCOLM -- Column (IGNORED) */
1833 case 4: /* DECSCLM -- Scroll (IGNORED) */
1834 case 8: /* DECARM -- Auto repeat (IGNORED) */
1835 case 18: /* DECPFF -- Printer feed (IGNORED) */
1836 case 19: /* DECPEX -- Printer extent (IGNORED) */
1837 case 42: /* DECNRCM -- National characters (IGNORED) */
1838 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1839 break;
1840 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1841 MODBIT(term.mode, !set, MODE_HIDE);
1842 break;
1843 case 9: /* X10 mouse compatibility mode */
1844 xsetpointermotion(0);
1845 MODBIT(term.mode, 0, MODE_MOUSE);
1846 MODBIT(term.mode, set, MODE_MOUSEX10);
1847 break;
1848 case 1000: /* 1000: report button press */
1849 xsetpointermotion(0);
1850 MODBIT(term.mode, 0, MODE_MOUSE);
1851 MODBIT(term.mode, set, MODE_MOUSEBTN);
1852 break;
1853 case 1002: /* 1002: report motion on button press */
1854 xsetpointermotion(0);
1855 MODBIT(term.mode, 0, MODE_MOUSE);
1856 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1857 break;
1858 case 1003: /* 1003: enable all mouse motions */
1859 xsetpointermotion(set);
1860 MODBIT(term.mode, 0, MODE_MOUSE);
1861 MODBIT(term.mode, set, MODE_MOUSEMANY);
1862 break;
1863 case 1004: /* 1004: send focus events to tty */
1864 MODBIT(term.mode, set, MODE_FOCUS);
1865 break;
1866 case 1006: /* 1006: extended reporting mode */
1867 MODBIT(term.mode, set, MODE_MOUSESGR);
1868 break;
1869 case 1034:
1870 MODBIT(term.mode, set, MODE_8BIT);
1871 break;
1872 case 1049: /* swap screen & set/restore cursor as xterm */
1873 if (!allowaltscreen)
1874 break;
1875 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1876 /* FALLTHROUGH */
1877 case 47: /* swap screen */
1878 case 1047:
1879 if (!allowaltscreen)
1880 break;
1881 alt = IS_SET(MODE_ALTSCREEN);
1882 if(alt) {
1883 tclearregion(0, 0, term.col-1,
1884 term.row-1);
1885 }
1886 if(set ^ alt) /* set is always 1 or 0 */
1887 tswapscreen();
1888 if(*args != 1049)
1889 break;
1890 /* FALLTHROUGH */
1891 case 1048:
1892 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1893 break;
1894 case 2004: /* 2004: bracketed paste mode */
1895 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1896 break;
1897 /* Not implemented mouse modes. See comments there. */
1898 case 1001: /* mouse highlight mode; can hang the
1899 terminal by design when implemented. */
1900 case 1005: /* UTF-8 mouse mode; will confuse
1901 applications not supporting UTF-8
1902 and luit. */
1903 case 1015: /* urxvt mangled mouse mode; incompatible
1904 and can be mistaken for other control
1905 codes. */
1906 default:
1907 fprintf(stderr,
1908 "erresc: unknown private set/reset mode %d\n",
1909 *args);
1910 break;
1911 }
1912 } else {
1913 switch(*args) {
1914 case 0: /* Error (IGNORED) */
1915 break;
1916 case 2: /* KAM -- keyboard action */
1917 MODBIT(term.mode, set, MODE_KBDLOCK);
1918 break;
1919 case 4: /* IRM -- Insertion-replacement */
1920 MODBIT(term.mode, set, MODE_INSERT);
1921 break;
1922 case 12: /* SRM -- Send/Receive */
1923 MODBIT(term.mode, !set, MODE_ECHO);
1924 break;
1925 case 20: /* LNM -- Linefeed/new line */
1926 MODBIT(term.mode, set, MODE_CRLF);
1927 break;
1928 default:
1929 fprintf(stderr,
1930 "erresc: unknown set/reset mode %d\n",
1931 *args);
1932 break;
1933 }
1934 }
1935 }
1936 }
1937
1938 void
1939 csihandle(void) {
1940 char buf[40];
1941 int len;
1942
1943 switch(csiescseq.mode) {
1944 default:
1945 unknown:
1946 fprintf(stderr, "erresc: unknown csi ");
1947 csidump();
1948 /* die(""); */
1949 break;
1950 case '@': /* ICH -- Insert <n> blank char */
1951 DEFAULT(csiescseq.arg[0], 1);
1952 tinsertblank(csiescseq.arg[0]);
1953 break;
1954 case 'A': /* CUU -- Cursor <n> Up */
1955 DEFAULT(csiescseq.arg[0], 1);
1956 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1957 break;
1958 case 'B': /* CUD -- Cursor <n> Down */
1959 case 'e': /* VPR --Cursor <n> Down */
1960 DEFAULT(csiescseq.arg[0], 1);
1961 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1962 break;
1963 case 'i': /* MC -- Media Copy */
1964 switch(csiescseq.arg[0]) {
1965 case 0:
1966 tdump();
1967 break;
1968 case 1:
1969 tdumpline(term.c.y);
1970 break;
1971 case 2:
1972 tdumpsel();
1973 break;
1974 case 4:
1975 term.mode &= ~MODE_PRINT;
1976 break;
1977 case 5:
1978 term.mode |= MODE_PRINT;
1979 break;
1980 }
1981 break;
1982 case 'c': /* DA -- Device Attributes */
1983 if(csiescseq.arg[0] == 0)
1984 ttywrite(vtiden, sizeof(vtiden) - 1);
1985 break;
1986 case 'C': /* CUF -- Cursor <n> Forward */
1987 case 'a': /* HPR -- Cursor <n> Forward */
1988 DEFAULT(csiescseq.arg[0], 1);
1989 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1990 break;
1991 case 'D': /* CUB -- Cursor <n> Backward */
1992 DEFAULT(csiescseq.arg[0], 1);
1993 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1994 break;
1995 case 'E': /* CNL -- Cursor <n> Down and first col */
1996 DEFAULT(csiescseq.arg[0], 1);
1997 tmoveto(0, term.c.y+csiescseq.arg[0]);
1998 break;
1999 case 'F': /* CPL -- Cursor <n> Up and first col */
2000 DEFAULT(csiescseq.arg[0], 1);
2001 tmoveto(0, term.c.y-csiescseq.arg[0]);
2002 break;
2003 case 'g': /* TBC -- Tabulation clear */
2004 switch(csiescseq.arg[0]) {
2005 case 0: /* clear current tab stop */
2006 term.tabs[term.c.x] = 0;
2007 break;
2008 case 3: /* clear all the tabs */
2009 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2010 break;
2011 default:
2012 goto unknown;
2013 }
2014 break;
2015 case 'G': /* CHA -- Move to <col> */
2016 case '`': /* HPA */
2017 DEFAULT(csiescseq.arg[0], 1);
2018 tmoveto(csiescseq.arg[0]-1, term.c.y);
2019 break;
2020 case 'H': /* CUP -- Move to <row> <col> */
2021 case 'f': /* HVP */
2022 DEFAULT(csiescseq.arg[0], 1);
2023 DEFAULT(csiescseq.arg[1], 1);
2024 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2025 break;
2026 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2027 DEFAULT(csiescseq.arg[0], 1);
2028 tputtab(csiescseq.arg[0]);
2029 break;
2030 case 'J': /* ED -- Clear screen */
2031 selclear(NULL);
2032 switch(csiescseq.arg[0]) {
2033 case 0: /* below */
2034 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2035 if(term.c.y < term.row-1) {
2036 tclearregion(0, term.c.y+1, term.col-1,
2037 term.row-1);
2038 }
2039 break;
2040 case 1: /* above */
2041 if(term.c.y > 1)
2042 tclearregion(0, 0, term.col-1, term.c.y-1);
2043 tclearregion(0, term.c.y, term.c.x, term.c.y);
2044 break;
2045 case 2: /* all */
2046 tclearregion(0, 0, term.col-1, term.row-1);
2047 break;
2048 default:
2049 goto unknown;
2050 }
2051 break;
2052 case 'K': /* EL -- Clear line */
2053 switch(csiescseq.arg[0]) {
2054 case 0: /* right */
2055 tclearregion(term.c.x, term.c.y, term.col-1,
2056 term.c.y);
2057 break;
2058 case 1: /* left */
2059 tclearregion(0, term.c.y, term.c.x, term.c.y);
2060 break;
2061 case 2: /* all */
2062 tclearregion(0, term.c.y, term.col-1, term.c.y);
2063 break;
2064 }
2065 break;
2066 case 'S': /* SU -- Scroll <n> line up */
2067 DEFAULT(csiescseq.arg[0], 1);
2068 tscrollup(term.top, csiescseq.arg[0]);
2069 break;
2070 case 'T': /* SD -- Scroll <n> line down */
2071 DEFAULT(csiescseq.arg[0], 1);
2072 tscrolldown(term.top, csiescseq.arg[0]);
2073 break;
2074 case 'L': /* IL -- Insert <n> blank lines */
2075 DEFAULT(csiescseq.arg[0], 1);
2076 tinsertblankline(csiescseq.arg[0]);
2077 break;
2078 case 'l': /* RM -- Reset Mode */
2079 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2080 break;
2081 case 'M': /* DL -- Delete <n> lines */
2082 DEFAULT(csiescseq.arg[0], 1);
2083 tdeleteline(csiescseq.arg[0]);
2084 break;
2085 case 'X': /* ECH -- Erase <n> char */
2086 DEFAULT(csiescseq.arg[0], 1);
2087 tclearregion(term.c.x, term.c.y,
2088 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2089 break;
2090 case 'P': /* DCH -- Delete <n> char */
2091 DEFAULT(csiescseq.arg[0], 1);
2092 tdeletechar(csiescseq.arg[0]);
2093 break;
2094 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2095 DEFAULT(csiescseq.arg[0], 1);
2096 tputtab(-csiescseq.arg[0]);
2097 break;
2098 case 'd': /* VPA -- Move to <row> */
2099 DEFAULT(csiescseq.arg[0], 1);
2100 tmoveato(term.c.x, csiescseq.arg[0]-1);
2101 break;
2102 case 'h': /* SM -- Set terminal mode */
2103 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2104 break;
2105 case 'm': /* SGR -- Terminal attribute (color) */
2106 tsetattr(csiescseq.arg, csiescseq.narg);
2107 break;
2108 case 'n': /* DSR – Device Status Report (cursor position) */
2109 if (csiescseq.arg[0] == 6) {
2110 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2111 term.c.y+1, term.c.x+1);
2112 ttywrite(buf, len);
2113 }
2114 break;
2115 case 'r': /* DECSTBM -- Set Scrolling Region */
2116 if(csiescseq.priv) {
2117 goto unknown;
2118 } else {
2119 DEFAULT(csiescseq.arg[0], 1);
2120 DEFAULT(csiescseq.arg[1], term.row);
2121 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2122 tmoveato(0, 0);
2123 }
2124 break;
2125 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2126 tcursor(CURSOR_SAVE);
2127 break;
2128 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2129 tcursor(CURSOR_LOAD);
2130 break;
2131 }
2132 }
2133
2134 void
2135 csidump(void) {
2136 int i;
2137 uint c;
2138
2139 printf("ESC[");
2140 for(i = 0; i < csiescseq.len; i++) {
2141 c = csiescseq.buf[i] & 0xff;
2142 if(isprint(c)) {
2143 putchar(c);
2144 } else if(c == '\n') {
2145 printf("(\\n)");
2146 } else if(c == '\r') {
2147 printf("(\\r)");
2148 } else if(c == 0x1b) {
2149 printf("(\\e)");
2150 } else {
2151 printf("(%02x)", c);
2152 }
2153 }
2154 putchar('\n');
2155 }
2156
2157 void
2158 csireset(void) {
2159 memset(&csiescseq, 0, sizeof(csiescseq));
2160 }
2161
2162 void
2163 strhandle(void) {
2164 char *p = NULL;
2165 int j, narg, par;
2166
2167 term.esc &= ~(ESC_STR_END|ESC_STR);
2168 strparse();
2169 narg = strescseq.narg;
2170 par = atoi(strescseq.args[0]);
2171
2172 switch(strescseq.type) {
2173 case ']': /* OSC -- Operating System Command */
2174 switch(par) {
2175 case 0:
2176 case 1:
2177 case 2:
2178 if(narg > 1)
2179 xsettitle(strescseq.args[1]);
2180 return;
2181 case 4: /* color set */
2182 if(narg < 3)
2183 break;
2184 p = strescseq.args[2];
2185 /* FALLTHROUGH */
2186 case 104: /* color reset, here p = NULL */
2187 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2188 if(xsetcolorname(j, p)) {
2189 fprintf(stderr, "erresc: invalid color %s\n", p);
2190 } else {
2191 /*
2192 * TODO if defaultbg color is changed, borders
2193 * are dirty
2194 */
2195 redraw(0);
2196 }
2197 return;
2198 }
2199 break;
2200 case 'k': /* old title set compatibility */
2201 xsettitle(strescseq.args[0]);
2202 return;
2203 case 'P': /* DCS -- Device Control String */
2204 case '_': /* APC -- Application Program Command */
2205 case '^': /* PM -- Privacy Message */
2206 return;
2207 }
2208
2209 fprintf(stderr, "erresc: unknown str ");
2210 strdump();
2211 }
2212
2213 void
2214 strparse(void) {
2215 char *p = strescseq.buf;
2216
2217 strescseq.narg = 0;
2218 strescseq.buf[strescseq.len] = '\0';
2219 while(p && strescseq.narg < STR_ARG_SIZ)
2220 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2221 }
2222
2223 void
2224 strdump(void) {
2225 int i;
2226 uint c;
2227
2228 printf("ESC%c", strescseq.type);
2229 for(i = 0; i < strescseq.len; i++) {
2230 c = strescseq.buf[i] & 0xff;
2231 if(c == '\0') {
2232 return;
2233 } else if(isprint(c)) {
2234 putchar(c);
2235 } else if(c == '\n') {
2236 printf("(\\n)");
2237 } else if(c == '\r') {
2238 printf("(\\r)");
2239 } else if(c == 0x1b) {
2240 printf("(\\e)");
2241 } else {
2242 printf("(%02x)", c);
2243 }
2244 }
2245 printf("ESC\\\n");
2246 }
2247
2248 void
2249 strreset(void) {
2250 memset(&strescseq, 0, sizeof(strescseq));
2251 }
2252
2253 void
2254 tprinter(char *s, size_t len) {
2255 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2256 fprintf(stderr, "Error writing in %s:%s\n",
2257 opt_io, strerror(errno));
2258 close(iofd);
2259 iofd = -1;
2260 }
2261 }
2262
2263 void
2264 toggleprinter(const Arg *arg) {
2265 term.mode ^= MODE_PRINT;
2266 }
2267
2268 void
2269 printscreen(const Arg *arg) {
2270 tdump();
2271 }
2272
2273 void
2274 printsel(const Arg *arg) {
2275 tdumpsel();
2276 }
2277
2278 void
2279 tdumpsel(void) {
2280 char *ptr;
2281
2282 if((ptr = getsel())) {
2283 tprinter(ptr, strlen(ptr));
2284 free(ptr);
2285 }
2286 }
2287
2288 void
2289 tdumpline(int n) {
2290 Glyph *bp, *end;
2291
2292 bp = &term.line[n][0];
2293 end = &bp[MIN(tlinelen(n), term.col) - 1];
2294 if(bp != end || bp->c[0] != ' ') {
2295 for( ;bp <= end; ++bp)
2296 tprinter(bp->c, utf8len(bp->c));
2297 }
2298 tprinter("\n", 1);
2299 }
2300
2301 void
2302 tdump(void) {
2303 int i;
2304
2305 for(i = 0; i < term.row; ++i)
2306 tdumpline(i);
2307 }
2308
2309 void
2310 tputtab(int n) {
2311 uint x = term.c.x;
2312
2313 if(n > 0) {
2314 while(x < term.col && n--)
2315 for(++x; x < term.col && !term.tabs[x]; ++x)
2316 /* nothing */ ;
2317 } else if(n < 0) {
2318 while(x > 0 && n++)
2319 for(--x; x > 0 && !term.tabs[x]; --x)
2320 /* nothing */ ;
2321 }
2322 tmoveto(x, term.c.y);
2323 }
2324
2325 void
2326 techo(char *buf, int len) {
2327 for(; len > 0; buf++, len--) {
2328 char c = *buf;
2329
2330 if(ISCONTROL((uchar) c)) { /* control code */
2331 if(c & 0x80) {
2332 c &= 0x7f;
2333 tputc("^", 1);
2334 tputc("[", 1);
2335 } else if(c != '\n' && c != '\r' && c != '\t') {
2336 c ^= 0x40;
2337 tputc("^", 1);
2338 }
2339 tputc(&c, 1);
2340 } else {
2341 break;
2342 }
2343 }
2344 if(len)
2345 tputc(buf, len);
2346 }
2347
2348 void
2349 tdeftran(char ascii) {
2350 static char cs[] = "0B";
2351 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2352 char *p;
2353
2354 if((p = strchr(cs, ascii)) == NULL) {
2355 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2356 } else {
2357 term.trantbl[term.icharset] = vcs[p - cs];
2358 }
2359 }
2360
2361 void
2362 tdectest(char c) {
2363 static char E[UTF_SIZ] = "E";
2364 int x, y;
2365
2366 if(c == '8') { /* DEC screen alignment test. */
2367 for(x = 0; x < term.col; ++x) {
2368 for(y = 0; y < term.row; ++y)
2369 tsetchar(E, &term.c.attr, x, y);
2370 }
2371 }
2372 }
2373
2374 void
2375 tstrsequence(uchar c) {
2376 if (c & 0x80) {
2377 switch (c) {
2378 case 0x90: /* DCS -- Device Control String */
2379 c = 'P';
2380 break;
2381 case 0x9f: /* APC -- Application Program Command */
2382 c = '_';
2383 break;
2384 case 0x9e: /* PM -- Privacy Message */
2385 c = '^';
2386 break;
2387 case 0x9d: /* OSC -- Operating System Command */
2388 c = ']';
2389 break;
2390 }
2391 }
2392 strreset();
2393 strescseq.type = c;
2394 term.esc |= ESC_STR;
2395 return;
2396 }
2397
2398 void
2399 tcontrolcode(uchar ascii) {
2400 static char question[UTF_SIZ] = "?";
2401
2402 switch(ascii) {
2403 case '\t': /* HT */
2404 tputtab(1);
2405 return;
2406 case '\b': /* BS */
2407 tmoveto(term.c.x-1, term.c.y);
2408 return;
2409 case '\r': /* CR */
2410 tmoveto(0, term.c.y);
2411 return;
2412 case '\f': /* LF */
2413 case '\v': /* VT */
2414 case '\n': /* LF */
2415 /* go to first col if the mode is set */
2416 tnewline(IS_SET(MODE_CRLF));
2417 return;
2418 case '\a': /* BEL */
2419 if(term.esc & ESC_STR_END) {
2420 /* backwards compatibility to xterm */
2421 strhandle();
2422 } else {
2423 if(!(xw.state & WIN_FOCUSED))
2424 xseturgency(1);
2425 if (bellvolume)
2426 XBell(xw.dpy, bellvolume);
2427 }
2428 break;
2429 case '\033': /* ESC */
2430 csireset();
2431 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2432 term.esc |= ESC_START;
2433 return;
2434 case '\016': /* SO */
2435 term.charset = 0;
2436 return;
2437 case '\017': /* SI */
2438 term.charset = 1;
2439 return;
2440 case '\032': /* SUB */
2441 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2442 case '\030': /* CAN */
2443 csireset();
2444 break;
2445 case '\005': /* ENQ (IGNORED) */
2446 case '\000': /* NUL (IGNORED) */
2447 case '\021': /* XON (IGNORED) */
2448 case '\023': /* XOFF (IGNORED) */
2449 case 0177: /* DEL (IGNORED) */
2450 return;
2451 case 0x84: /* TODO: IND */
2452 break;
2453 case 0x85: /* NEL -- Next line */
2454 tnewline(1); /* always go to first col */
2455 break;
2456 case 0x88: /* HTS -- Horizontal tab stop */
2457 term.tabs[term.c.x] = 1;
2458 break;
2459 case 0x8d: /* TODO: RI */
2460 case 0x8e: /* TODO: SS2 */
2461 case 0x8f: /* TODO: SS3 */
2462 case 0x98: /* TODO: SOS */
2463 break;
2464 case 0x9a: /* DECID -- Identify Terminal */
2465 ttywrite(vtiden, sizeof(vtiden) - 1);
2466 break;
2467 case 0x9b: /* TODO: CSI */
2468 case 0x9c: /* TODO: ST */
2469 break;
2470 case 0x90: /* DCS -- Device Control String */
2471 case 0x9f: /* APC -- Application Program Command */
2472 case 0x9e: /* PM -- Privacy Message */
2473 case 0x9d: /* OSC -- Operating System Command */
2474 tstrsequence(ascii);
2475 return;
2476 }
2477 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2478 term.esc &= ~(ESC_STR_END|ESC_STR);
2479 return;
2480 }
2481
2482 /*
2483 * returns 1 when the sequence is finished and it hasn't to read
2484 * more characters for this sequence, otherwise 0
2485 */
2486 int
2487 eschandle(uchar ascii) {
2488 switch(ascii) {
2489 case '[':
2490 term.esc |= ESC_CSI;
2491 return 0;
2492 case '#':
2493 term.esc |= ESC_TEST;
2494 return 0;
2495 case 'P': /* DCS -- Device Control String */
2496 case '_': /* APC -- Application Program Command */
2497 case '^': /* PM -- Privacy Message */
2498 case ']': /* OSC -- Operating System Command */
2499 case 'k': /* old title set compatibility */
2500 tstrsequence(ascii);
2501 return 0;
2502 case '(': /* GZD4 -- set primary charset G0 */
2503 case ')': /* G1D4 -- set secondary charset G1 */
2504 case '*': /* G2D4 -- set tertiary charset G2 */
2505 case '+': /* G3D4 -- set quaternary charset G3 */
2506 term.icharset = ascii - '(';
2507 term.esc |= ESC_ALTCHARSET;
2508 return 0;
2509 case 'D': /* IND -- Linefeed */
2510 if(term.c.y == term.bot) {
2511 tscrollup(term.top, 1);
2512 } else {
2513 tmoveto(term.c.x, term.c.y+1);
2514 }
2515 break;
2516 case 'E': /* NEL -- Next line */
2517 tnewline(1); /* always go to first col */
2518 break;
2519 case 'H': /* HTS -- Horizontal tab stop */
2520 term.tabs[term.c.x] = 1;
2521 break;
2522 case 'M': /* RI -- Reverse index */
2523 if(term.c.y == term.top) {
2524 tscrolldown(term.top, 1);
2525 } else {
2526 tmoveto(term.c.x, term.c.y-1);
2527 }
2528 break;
2529 case 'Z': /* DECID -- Identify Terminal */
2530 ttywrite(vtiden, sizeof(vtiden) - 1);
2531 break;
2532 case 'c': /* RIS -- Reset to inital state */
2533 treset();
2534 xresettitle();
2535 xloadcols();
2536 break;
2537 case '=': /* DECPAM -- Application keypad */
2538 term.mode |= MODE_APPKEYPAD;
2539 break;
2540 case '>': /* DECPNM -- Normal keypad */
2541 term.mode &= ~MODE_APPKEYPAD;
2542 break;
2543 case '7': /* DECSC -- Save Cursor */
2544 tcursor(CURSOR_SAVE);
2545 break;
2546 case '8': /* DECRC -- Restore Cursor */
2547 tcursor(CURSOR_LOAD);
2548 break;
2549 case '\\': /* ST -- String Terminator */
2550 if(term.esc & ESC_STR_END)
2551 strhandle();
2552 break;
2553 default:
2554 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2555 (uchar) ascii, isprint(ascii)? ascii:'.');
2556 break;
2557 }
2558 return 1;
2559 }
2560
2561 void
2562 tputc(char *c, int len) {
2563 uchar ascii;
2564 bool control;
2565 long unicodep;
2566 int width;
2567 Glyph *gp;
2568
2569 if(len == 1) {
2570 width = 1;
2571 unicodep = ascii = *c;
2572 } else {
2573 utf8decode(c, &unicodep, UTF_SIZ);
2574 width = wcwidth(unicodep);
2575 control = ISCONTROLC1(unicodep);
2576 ascii = unicodep;
2577 }
2578
2579 if(IS_SET(MODE_PRINT))
2580 tprinter(c, len);
2581 control = ISCONTROL(unicodep);
2582
2583 /*
2584 * STR sequence must be checked before anything else
2585 * because it uses all following characters until it
2586 * receives a ESC, a SUB, a ST or any other C1 control
2587 * character.
2588 */
2589 if(term.esc & ESC_STR) {
2590 if(width == 1 &&
2591 (ascii == '\a' || ascii == 030 ||
2592 ascii == 032 || ascii == 033 ||
2593 ISCONTROLC1(unicodep))) {
2594 term.esc &= ~(ESC_START|ESC_STR);
2595 term.esc |= ESC_STR_END;
2596 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2597 memmove(&strescseq.buf[strescseq.len], c, len);
2598 strescseq.len += len;
2599 return;
2600 } else {
2601 /*
2602 * Here is a bug in terminals. If the user never sends
2603 * some code to stop the str or esc command, then st
2604 * will stop responding. But this is better than
2605 * silently failing with unknown characters. At least
2606 * then users will report back.
2607 *
2608 * In the case users ever get fixed, here is the code:
2609 */
2610 /*
2611 * term.esc = 0;
2612 * strhandle();
2613 */
2614 return;
2615 }
2616 }
2617
2618 /*
2619 * Actions of control codes must be performed as soon they arrive
2620 * because they can be embedded inside a control sequence, and
2621 * they must not cause conflicts with sequences.
2622 */
2623 if(control) {
2624 tcontrolcode(ascii);
2625 /*
2626 * control codes are not shown ever
2627 */
2628 return;
2629 } else if(term.esc & ESC_START) {
2630 if(term.esc & ESC_CSI) {
2631 csiescseq.buf[csiescseq.len++] = ascii;
2632 if(BETWEEN(ascii, 0x40, 0x7E)
2633 || csiescseq.len >= \
2634 sizeof(csiescseq.buf)-1) {
2635 term.esc = 0;
2636 csiparse();
2637 csihandle();
2638 }
2639 return;
2640 } else if(term.esc & ESC_ALTCHARSET) {
2641 tdeftran(ascii);
2642 } else if(term.esc & ESC_TEST) {
2643 tdectest(ascii);
2644 } else {
2645 if (!eschandle(ascii))
2646 return;
2647 /* sequence already finished */
2648 }
2649 term.esc = 0;
2650 /*
2651 * All characters which form part of a sequence are not
2652 * printed
2653 */
2654 return;
2655 }
2656 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2657 selclear(NULL);
2658
2659 gp = &term.line[term.c.y][term.c.x];
2660 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2661 gp->mode |= ATTR_WRAP;
2662 tnewline(1);
2663 }
2664
2665 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2666 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2667
2668 if(term.c.x+width > term.col)
2669 tnewline(1);
2670
2671 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2672
2673 if(width == 2) {
2674 gp->mode |= ATTR_WIDE;
2675 if(term.c.x+1 < term.col) {
2676 gp[1].c[0] = '\0';
2677 gp[1].mode = ATTR_WDUMMY;
2678 }
2679 }
2680 if(term.c.x+width < term.col) {
2681 tmoveto(term.c.x+width, term.c.y);
2682 } else {
2683 term.c.state |= CURSOR_WRAPNEXT;
2684 }
2685 }
2686
2687 void
2688 tresize(int col, int row) {
2689 int i;
2690 int minrow = MIN(row, term.row);
2691 int mincol = MIN(col, term.col);
2692 int slide = term.c.y - row + 1;
2693 bool *bp;
2694 TCursor c;
2695
2696 if(col < 1 || row < 1) {
2697 fprintf(stderr,
2698 "tresize: error resizing to %dx%d\n", col, row);
2699 return;
2700 }
2701
2702 /* free unneeded rows */
2703 i = 0;
2704 if(slide > 0) {
2705 /*
2706 * slide screen to keep cursor where we expect it -
2707 * tscrollup would work here, but we can optimize to
2708 * memmove because we're freeing the earlier lines
2709 */
2710 for(/* i = 0 */; i < slide; i++) {
2711 free(term.line[i]);
2712 free(term.alt[i]);
2713 }
2714 memmove(term.line, term.line + slide, row * sizeof(Line));
2715 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2716 }
2717 for(i += row; i < term.row; i++) {
2718 free(term.line[i]);
2719 free(term.alt[i]);
2720 }
2721
2722 /* resize to new height */
2723 term.line = xrealloc(term.line, row * sizeof(Line));
2724 term.alt = xrealloc(term.alt, row * sizeof(Line));
2725 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2726 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2727
2728 /* resize each row to new width, zero-pad if needed */
2729 for(i = 0; i < minrow; i++) {
2730 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2731 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2732 }
2733
2734 /* allocate any new rows */
2735 for(/* i == minrow */; i < row; i++) {
2736 term.line[i] = xmalloc(col * sizeof(Glyph));
2737 term.alt[i] = xmalloc(col * sizeof(Glyph));
2738 }
2739 if(col > term.col) {
2740 bp = term.tabs + term.col;
2741
2742 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2743 while(--bp > term.tabs && !*bp)
2744 /* nothing */ ;
2745 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2746 *bp = 1;
2747 }
2748 /* update terminal size */
2749 term.col = col;
2750 term.row = row;
2751 /* reset scrolling region */
2752 tsetscroll(0, row-1);
2753 /* make use of the LIMIT in tmoveto */
2754 tmoveto(term.c.x, term.c.y);
2755 /* Clearing both screens (it makes dirty all lines) */
2756 c = term.c;
2757 for(i = 0; i < 2; i++) {
2758 if(mincol < col && 0 < minrow) {
2759 tclearregion(mincol, 0, col - 1, minrow - 1);
2760 }
2761 if(0 < col && minrow < row) {
2762 tclearregion(0, minrow, col - 1, row - 1);
2763 }
2764 tswapscreen();
2765 tcursor(CURSOR_LOAD);
2766 }
2767 term.c = c;
2768 }
2769
2770 void
2771 xresize(int col, int row) {
2772 xw.tw = MAX(1, col * xw.cw);
2773 xw.th = MAX(1, row * xw.ch);
2774
2775 XFreePixmap(xw.dpy, xw.buf);
2776 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2777 DefaultDepth(xw.dpy, xw.scr));
2778 XftDrawChange(xw.draw, xw.buf);
2779 xclear(0, 0, xw.w, xw.h);
2780 }
2781
2782 static inline ushort
2783 sixd_to_16bit(int x) {
2784 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2785 }
2786
2787 void
2788 xloadcols(void) {
2789 int i;
2790 XRenderColor color = { .alpha = 0xffff };
2791 static bool loaded;
2792 Color *cp;
2793
2794 if(loaded) {
2795 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2796 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2797 }
2798
2799 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2800 for(i = 0; i < LEN(colorname); i++) {
2801 if(!colorname[i])
2802 continue;
2803 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2804 die("Could not allocate color '%s'\n", colorname[i]);
2805 }
2806 }
2807
2808 /* load colors [16-231] ; same colors as xterm */
2809 for(i = 16; i < 6*6*6+16; i++) {
2810 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2811 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2812 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2813 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2814 die("Could not allocate color %d\n", i);
2815 }
2816
2817 /* load colors [232-255] ; grayscale */
2818 for(; i < 256; i++) {
2819 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2820 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2821 die("Could not allocate color %d\n", i);
2822 }
2823 loaded = true;
2824 }
2825
2826 int
2827 xsetcolorname(int x, const char *name) {
2828 XRenderColor color = { .alpha = 0xffff };
2829 Color ncolor;
2830
2831 if(!BETWEEN(x, 0, LEN(colorname)))
2832 return 1;
2833
2834 if(!name) {
2835 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2836 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2837 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2838 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2839 if(!XftColorAllocValue(xw.dpy, xw.vis,
2840 xw.cmap, &color, &ncolor)) {
2841 return 1;
2842 }
2843
2844 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2845 dc.col[x] = ncolor;
2846 return 0;
2847 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2848 color.red = color.green = color.blue = \
2849 0x0808 + 0x0a0a * (x - (16 + 216));
2850 if(!XftColorAllocValue(xw.dpy, xw.vis,
2851 xw.cmap, &color, &ncolor)) {
2852 return 1;
2853 }
2854
2855 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2856 dc.col[x] = ncolor;
2857 return 0;
2858 } else { /* system colors */
2859 name = colorname[x];
2860 }
2861 }
2862 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2863 return 1;
2864
2865 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2866 dc.col[x] = ncolor;
2867 return 0;
2868 }
2869
2870 void
2871 xtermclear(int col1, int row1, int col2, int row2) {
2872 XftDrawRect(xw.draw,
2873 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2874 borderpx + col1 * xw.cw,
2875 borderpx + row1 * xw.ch,
2876 (col2-col1+1) * xw.cw,
2877 (row2-row1+1) * xw.ch);
2878 }
2879
2880 /*
2881 * Absolute coordinates.
2882 */
2883 void
2884 xclear(int x1, int y1, int x2, int y2) {
2885 XftDrawRect(xw.draw,
2886 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2887 x1, y1, x2-x1, y2-y1);
2888 }
2889
2890 void
2891 xhints(void) {
2892 XClassHint class = {opt_class ? opt_class : termname, termname};
2893 XWMHints wm = {.flags = InputHint, .input = 1};
2894 XSizeHints *sizeh = NULL;
2895
2896 sizeh = XAllocSizeHints();
2897
2898 sizeh->flags = PSize | PResizeInc | PBaseSize;
2899 sizeh->height = xw.h;
2900 sizeh->width = xw.w;
2901 sizeh->height_inc = xw.ch;
2902 sizeh->width_inc = xw.cw;
2903 sizeh->base_height = 2 * borderpx;
2904 sizeh->base_width = 2 * borderpx;
2905 if(xw.isfixed == True) {
2906 sizeh->flags |= PMaxSize | PMinSize;
2907 sizeh->min_width = sizeh->max_width = xw.w;
2908 sizeh->min_height = sizeh->max_height = xw.h;
2909 }
2910 if(xw.gm & (XValue|YValue)) {
2911 sizeh->flags |= USPosition | PWinGravity;
2912 sizeh->x = xw.l;
2913 sizeh->y = xw.t;
2914 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2915 }
2916
2917 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2918 &class);
2919 XFree(sizeh);
2920 }
2921
2922 int
2923 xgeommasktogravity(int mask) {
2924 switch(mask & (XNegative|YNegative)) {
2925 case 0:
2926 return NorthWestGravity;
2927 case XNegative:
2928 return NorthEastGravity;
2929 case YNegative:
2930 return SouthWestGravity;
2931 }
2932 return SouthEastGravity;
2933 }
2934
2935 int
2936 xloadfont(Font *f, FcPattern *pattern) {
2937 FcPattern *match;
2938 FcResult result;
2939
2940 match = FcFontMatch(NULL, pattern, &result);
2941 if(!match)
2942 return 1;
2943
2944 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2945 FcPatternDestroy(match);
2946 return 1;
2947 }
2948
2949 f->set = NULL;
2950 f->pattern = FcPatternDuplicate(pattern);
2951
2952 f->ascent = f->match->ascent;
2953 f->descent = f->match->descent;
2954 f->lbearing = 0;
2955 f->rbearing = f->match->max_advance_width;
2956
2957 f->height = f->ascent + f->descent;
2958 f->width = f->lbearing + f->rbearing;
2959
2960 return 0;
2961 }
2962
2963 void
2964 xloadfonts(char *fontstr, double fontsize) {
2965 FcPattern *pattern;
2966 FcResult r_sz, r_psz;
2967 double fontval;
2968 float ceilf(float);
2969
2970 if(fontstr[0] == '-') {
2971 pattern = XftXlfdParse(fontstr, False, False);
2972 } else {
2973 pattern = FcNameParse((FcChar8 *)fontstr);
2974 }
2975
2976 if(!pattern)
2977 die("st: can't open font %s\n", fontstr);
2978
2979 if(fontsize > 0) {
2980 FcPatternDel(pattern, FC_PIXEL_SIZE);
2981 FcPatternDel(pattern, FC_SIZE);
2982 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2983 usedfontsize = fontsize;
2984 } else {
2985 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2986 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2987 if(r_psz == FcResultMatch) {
2988 usedfontsize = fontval;
2989 } else if(r_sz == FcResultMatch) {
2990 usedfontsize = -1;
2991 } else {
2992 /*
2993 * Default font size is 12, if none given. This is to
2994 * have a known usedfontsize value.
2995 */
2996 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2997 usedfontsize = 12;
2998 }
2999 defaultfontsize = usedfontsize;
3000 }
3001
3002 FcConfigSubstitute(0, pattern, FcMatchPattern);
3003 FcDefaultSubstitute(pattern);
3004
3005 if(xloadfont(&dc.font, pattern))
3006 die("st: can't open font %s\n", fontstr);
3007
3008 if(usedfontsize < 0) {
3009 FcPatternGetDouble(dc.font.match->pattern,
3010 FC_PIXEL_SIZE, 0, &fontval);
3011 usedfontsize = fontval;
3012 if(fontsize == 0)
3013 defaultfontsize = fontval;
3014 }
3015
3016 /* Setting character width and height. */
3017 xw.cw = ceilf(dc.font.width * cwscale);
3018 xw.ch = ceilf(dc.font.height * chscale);
3019
3020 FcPatternDel(pattern, FC_SLANT);
3021 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
3022 if(xloadfont(&dc.ifont, pattern))
3023 die("st: can't open font %s\n", fontstr);
3024
3025 FcPatternDel(pattern, FC_WEIGHT);
3026 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
3027 if(xloadfont(&dc.ibfont, pattern))
3028 die("st: can't open font %s\n", fontstr);
3029
3030 FcPatternDel(pattern, FC_SLANT);
3031 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
3032 if(xloadfont(&dc.bfont, pattern))
3033 die("st: can't open font %s\n", fontstr);
3034
3035 FcPatternDestroy(pattern);
3036 }
3037
3038 int
3039 xloadfontset(Font *f) {
3040 FcResult result;
3041
3042 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
3043 return 1;
3044 return 0;
3045 }
3046
3047 void
3048 xunloadfont(Font *f) {
3049 XftFontClose(xw.dpy, f->match);
3050 FcPatternDestroy(f->pattern);
3051 if(f->set)
3052 FcFontSetDestroy(f->set);
3053 }
3054
3055 void
3056 xunloadfonts(void) {
3057 /* Free the loaded fonts in the font cache. */
3058 while(frclen > 0)
3059 XftFontClose(xw.dpy, frc[--frclen].font);
3060
3061 xunloadfont(&dc.font);
3062 xunloadfont(&dc.bfont);
3063 xunloadfont(&dc.ifont);
3064 xunloadfont(&dc.ibfont);
3065 }
3066
3067
3068 void
3069 xzoom(const Arg *arg) {
3070 Arg larg;
3071 larg.i = usedfontsize + arg->i;
3072 xzoomabs(&larg);
3073 }
3074
3075 void
3076 xzoomabs(const Arg *arg) {
3077 xunloadfonts();
3078 xloadfonts(usedfont, arg->i);
3079 cresize(0, 0);
3080 redraw(0);
3081 xhints();
3082 }
3083
3084 void
3085 xzoomreset(const Arg *arg) {
3086 Arg larg;
3087 if(defaultfontsize > 0) {
3088 larg.i = defaultfontsize;
3089 xzoomabs(&larg);
3090 }
3091 }
3092
3093 void
3094 xinit(void) {
3095 XGCValues gcvalues;
3096 Cursor cursor;
3097 Window parent;
3098 pid_t thispid = getpid();
3099
3100 if(!(xw.dpy = XOpenDisplay(NULL)))
3101 die("Can't open display\n");
3102 xw.scr = XDefaultScreen(xw.dpy);
3103 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3104
3105 /* font */
3106 if(!FcInit())
3107 die("Could not init fontconfig.\n");
3108
3109 usedfont = (opt_font == NULL)? font : opt_font;
3110 xloadfonts(usedfont, 0);
3111
3112 /* colors */
3113 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3114 xloadcols();
3115
3116 /* adjust fixed window geometry */
3117 xw.w = 2 * borderpx + term.col * xw.cw;
3118 xw.h = 2 * borderpx + term.row * xw.ch;
3119 if(xw.gm & XNegative)
3120 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3121 if(xw.gm & YNegative)
3122 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3123
3124 /* Events */
3125 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3126 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3127 xw.attrs.bit_gravity = NorthWestGravity;
3128 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3129 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3130 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3131 xw.attrs.colormap = xw.cmap;
3132
3133 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3134 XRootWindow(xw.dpy, xw.scr);
3135 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3136 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3137 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3138 | CWEventMask | CWColormap, &xw.attrs);
3139
3140 memset(&gcvalues, 0, sizeof(gcvalues));
3141 gcvalues.graphics_exposures = False;
3142 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3143 &gcvalues);
3144 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3145 DefaultDepth(xw.dpy, xw.scr));
3146 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3147 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3148
3149 /* Xft rendering context */
3150 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3151
3152 /* input methods */
3153 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3154 XSetLocaleModifiers("@im=local");
3155 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3156 XSetLocaleModifiers("@im=");
3157 if((xw.xim = XOpenIM(xw.dpy,
3158 NULL, NULL, NULL)) == NULL) {
3159 die("XOpenIM failed. Could not open input"
3160 " device.\n");
3161 }
3162 }
3163 }
3164 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3165 | XIMStatusNothing, XNClientWindow, xw.win,
3166 XNFocusWindow, xw.win, NULL);
3167 if(xw.xic == NULL)
3168 die("XCreateIC failed. Could not obtain input method.\n");
3169
3170 /* white cursor, black outline */
3171 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3172 XDefineCursor(xw.dpy, xw.win, cursor);
3173 XRecolorCursor(xw.dpy, cursor,
3174 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3175 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3176
3177 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3178 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3179 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3180 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3181
3182 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3183 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3184 PropModeReplace, (uchar *)&thispid, 1);
3185
3186 xresettitle();
3187 XMapWindow(xw.dpy, xw.win);
3188 xhints();
3189 XSync(xw.dpy, False);
3190 }
3191
3192 void
3193 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3194 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3195 width = charlen * xw.cw, xp, i;
3196 int frcflags;
3197 int u8fl, u8fblen, u8cblen, doesexist;
3198 char *u8c, *u8fs;
3199 long unicodep;
3200 Font *font = &dc.font;
3201 FcResult fcres;
3202 FcPattern *fcpattern, *fontpattern;
3203 FcFontSet *fcsets[] = { NULL };
3204 FcCharSet *fccharset;
3205 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3206 XRenderColor colfg, colbg;
3207 XRectangle r;
3208 int oneatatime;
3209
3210 frcflags = FRC_NORMAL;
3211
3212 if(base.mode & ATTR_ITALIC) {
3213 if(base.fg == defaultfg)
3214 base.fg = defaultitalic;
3215 font = &dc.ifont;
3216 frcflags = FRC_ITALIC;
3217 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3218 if(base.fg == defaultfg)
3219 base.fg = defaultitalic;
3220 font = &dc.ibfont;
3221 frcflags = FRC_ITALICBOLD;
3222 } else if(base.mode & ATTR_UNDERLINE) {
3223 if(base.fg == defaultfg)
3224 base.fg = defaultunderline;
3225 }
3226
3227 if(IS_TRUECOL(base.fg)) {
3228 colfg.alpha = 0xffff;
3229 colfg.red = TRUERED(base.fg);
3230 colfg.green = TRUEGREEN(base.fg);
3231 colfg.blue = TRUEBLUE(base.fg);
3232 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3233 fg = &truefg;
3234 } else {
3235 fg = &dc.col[base.fg];
3236 }
3237
3238 if(IS_TRUECOL(base.bg)) {
3239 colbg.alpha = 0xffff;
3240 colbg.green = TRUEGREEN(base.bg);
3241 colbg.red = TRUERED(base.bg);
3242 colbg.blue = TRUEBLUE(base.bg);
3243 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3244 bg = &truebg;
3245 } else {
3246 bg = &dc.col[base.bg];
3247 }
3248
3249 if(base.mode & ATTR_BOLD) {
3250 /*
3251 * change basic system colors [0-7]
3252 * to bright system colors [8-15]
3253 */
3254 if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
3255 fg = &dc.col[base.fg + 8];
3256
3257 if(base.mode & ATTR_ITALIC) {
3258 font = &dc.ibfont;
3259 frcflags = FRC_ITALICBOLD;
3260 } else {
3261 font = &dc.bfont;
3262 frcflags = FRC_BOLD;
3263 }
3264 }
3265
3266 if(IS_SET(MODE_REVERSE)) {
3267 if(fg == &dc.col[defaultfg]) {
3268 fg = &dc.col[defaultbg];
3269 } else {
3270 colfg.red = ~fg->color.red;
3271 colfg.green = ~fg->color.green;
3272 colfg.blue = ~fg->color.blue;
3273 colfg.alpha = fg->color.alpha;
3274 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3275 &revfg);
3276 fg = &revfg;
3277 }
3278
3279 if(bg == &dc.col[defaultbg]) {
3280 bg = &dc.col[defaultfg];
3281 } else {
3282 colbg.red = ~bg->color.red;
3283 colbg.green = ~bg->color.green;
3284 colbg.blue = ~bg->color.blue;
3285 colbg.alpha = bg->color.alpha;
3286 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3287 &revbg);
3288 bg = &revbg;
3289 }
3290 }
3291
3292 if(base.mode & ATTR_REVERSE) {
3293 temp = fg;
3294 fg = bg;
3295 bg = temp;
3296 }
3297
3298 if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
3299 colfg.red = fg->color.red / 2;
3300 colfg.green = fg->color.green / 2;
3301 colfg.blue = fg->color.blue / 2;
3302 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3303 fg = &revfg;
3304 }
3305
3306 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3307 fg = bg;
3308
3309 if(base.mode & ATTR_INVISIBLE)
3310 fg = bg;
3311
3312 /* Intelligent cleaning up of the borders. */
3313 if(x == 0) {
3314 xclear(0, (y == 0)? 0 : winy, borderpx,
3315 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3316 }
3317 if(x + charlen >= term.col) {
3318 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3319 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3320 }
3321 if(y == 0)
3322 xclear(winx, 0, winx + width, borderpx);
3323 if(y == term.row-1)
3324 xclear(winx, winy + xw.ch, winx + width, xw.h);
3325
3326 /* Clean up the region we want to draw to. */
3327 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3328
3329 /* Set the clip region because Xft is sometimes dirty. */
3330 r.x = 0;
3331 r.y = 0;
3332 r.height = xw.ch;
3333 r.width = width;
3334 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3335
3336 for(xp = winx; bytelen > 0;) {
3337 /*
3338 * Search for the range in the to be printed string of glyphs
3339 * that are in the main font. Then print that range. If
3340 * some glyph is found that is not in the font, do the
3341 * fallback dance.
3342 */
3343 u8fs = s;
3344 u8fblen = 0;
3345 u8fl = 0;
3346 oneatatime = font->width != xw.cw;
3347 for(;;) {
3348 u8c = s;
3349 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3350 s += u8cblen;
3351 bytelen -= u8cblen;
3352
3353 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3354 if(doesexist) {
3355 u8fl++;
3356 u8fblen += u8cblen;
3357 if(!oneatatime && bytelen > 0)
3358 continue;
3359 }
3360
3361 if(u8fl > 0) {
3362 XftDrawStringUtf8(xw.draw, fg,
3363 font->match, xp,
3364 winy + font->ascent,
3365 (FcChar8 *)u8fs,
3366 u8fblen);
3367 xp += xw.cw * u8fl;
3368 }
3369 break;
3370 }
3371 if(doesexist) {
3372 if(oneatatime)
3373 continue;
3374 break;
3375 }
3376
3377 /* Search the font cache. */
3378 for(i = 0; i < frclen; i++) {
3379 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3380 && frc[i].flags == frcflags) {
3381 break;
3382 }
3383 }
3384
3385 /* Nothing was found. */
3386 if(i >= frclen) {
3387 if(!font->set)
3388 xloadfontset(font);
3389 fcsets[0] = font->set;
3390
3391 /*
3392 * Nothing was found in the cache. Now use
3393 * some dozen of Fontconfig calls to get the
3394 * font for one single character.
3395 *
3396 * Xft and fontconfig are design failures.
3397 */
3398 fcpattern = FcPatternDuplicate(font->pattern);
3399 fccharset = FcCharSetCreate();
3400
3401 FcCharSetAddChar(fccharset, unicodep);
3402 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3403 fccharset);
3404 FcPatternAddBool(fcpattern, FC_SCALABLE,
3405 FcTrue);
3406
3407 FcConfigSubstitute(0, fcpattern,
3408 FcMatchPattern);
3409 FcDefaultSubstitute(fcpattern);
3410
3411 fontpattern = FcFontSetMatch(0, fcsets,
3412 FcTrue, fcpattern, &fcres);
3413
3414 /*
3415 * Overwrite or create the new cache entry.
3416 */
3417 if(frclen >= LEN(frc)) {
3418 frclen = LEN(frc) - 1;
3419 XftFontClose(xw.dpy, frc[frclen].font);
3420 }
3421
3422 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3423 fontpattern);
3424 frc[frclen].flags = frcflags;
3425
3426 i = frclen;
3427 frclen++;
3428
3429 FcPatternDestroy(fcpattern);
3430 FcCharSetDestroy(fccharset);
3431 }
3432
3433 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3434 xp, winy + frc[i].font->ascent,
3435 (FcChar8 *)u8c, u8cblen);
3436
3437 xp += xw.cw * wcwidth(unicodep);
3438 }
3439
3440 /*
3441 * This is how the loop above actually should be. Why does the
3442 * application have to care about font details?
3443 *
3444 * I have to repeat: Xft and Fontconfig are design failures.
3445 */
3446 /*
3447 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3448 winy + font->ascent, (FcChar8 *)s, bytelen);
3449 */
3450
3451 if(base.mode & ATTR_UNDERLINE) {
3452 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3453 width, 1);
3454 }
3455
3456 if(base.mode & ATTR_STRUCK) {
3457 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3458 width, 1);
3459 }
3460
3461 /* Reset clip to none. */
3462 XftDrawSetClip(xw.draw, 0);
3463 }
3464
3465 void
3466 xdrawcursor(void) {
3467 static int oldx = 0, oldy = 0;
3468 int sl, width, curx;
3469 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3470
3471 LIMIT(oldx, 0, term.col-1);
3472 LIMIT(oldy, 0, term.row-1);
3473
3474 curx = term.c.x;
3475
3476 /* adjust position if in dummy */
3477 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3478 oldx--;
3479 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3480 curx--;
3481
3482 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3483
3484 /* remove the old cursor */
3485 sl = utf8len(term.line[oldy][oldx].c);
3486 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3487 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3488 oldy, width, sl);
3489
3490 if(IS_SET(MODE_HIDE))
3491 return;
3492
3493 /* draw the new one */
3494 if(xw.state & WIN_FOCUSED) {
3495 if(IS_SET(MODE_REVERSE)) {
3496 g.mode |= ATTR_REVERSE;
3497 g.fg = defaultcs;
3498 g.bg = defaultfg;
3499 }
3500
3501 sl = utf8len(g.c);
3502 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3503 ? 2 : 1;
3504 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3505 } else {
3506 XftDrawRect(xw.draw, &dc.col[defaultcs],
3507 borderpx + curx * xw.cw,
3508 borderpx + term.c.y * xw.ch,
3509 xw.cw - 1, 1);
3510 XftDrawRect(xw.draw, &dc.col[defaultcs],
3511 borderpx + curx * xw.cw,
3512 borderpx + term.c.y * xw.ch,
3513 1, xw.ch - 1);
3514 XftDrawRect(xw.draw, &dc.col[defaultcs],
3515 borderpx + (curx + 1) * xw.cw - 1,
3516 borderpx + term.c.y * xw.ch,
3517 1, xw.ch - 1);
3518 XftDrawRect(xw.draw, &dc.col[defaultcs],
3519 borderpx + curx * xw.cw,
3520 borderpx + (term.c.y + 1) * xw.ch - 1,
3521 xw.cw, 1);
3522 }
3523 oldx = curx, oldy = term.c.y;
3524 }
3525
3526
3527 void
3528 xsettitle(char *p) {
3529 XTextProperty prop;
3530
3531 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3532 &prop);
3533 XSetWMName(xw.dpy, xw.win, &prop);
3534 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3535 XFree(prop.value);
3536 }
3537
3538 void
3539 xresettitle(void) {
3540 xsettitle(opt_title ? opt_title : "st");
3541 }
3542
3543 void
3544 redraw(int timeout) {
3545 struct timespec tv = {0, timeout * 1000};
3546
3547 tfulldirt();
3548 draw();
3549
3550 if(timeout > 0) {
3551 nanosleep(&tv, NULL);
3552 XSync(xw.dpy, False); /* necessary for a good tput flash */
3553 }
3554 }
3555
3556 void
3557 draw(void) {
3558 drawregion(0, 0, term.col, term.row);
3559 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3560 xw.h, 0, 0);
3561 XSetForeground(xw.dpy, dc.gc,
3562 dc.col[IS_SET(MODE_REVERSE)?
3563 defaultfg : defaultbg].pixel);
3564 }
3565
3566 void
3567 drawregion(int x1, int y1, int x2, int y2) {
3568 int ic, ib, x, y, ox, sl;
3569 Glyph base, new;
3570 char buf[DRAW_BUF_SIZ];
3571 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3572 long unicodep;
3573
3574 if(!(xw.state & WIN_VISIBLE))
3575 return;
3576
3577 for(y = y1; y < y2; y++) {
3578 if(!term.dirty[y])
3579 continue;
3580
3581 xtermclear(0, y, term.col, y);
3582 term.dirty[y] = 0;
3583 base = term.line[y][0];
3584 ic = ib = ox = 0;
3585 for(x = x1; x < x2; x++) {
3586 new = term.line[y][x];
3587 if(new.mode == ATTR_WDUMMY)
3588 continue;
3589 if(ena_sel && selected(x, y))
3590 new.mode ^= ATTR_REVERSE;
3591 if(ib > 0 && (ATTRCMP(base, new)
3592 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3593 xdraws(buf, base, ox, y, ic, ib);
3594 ic = ib = 0;
3595 }
3596 if(ib == 0) {
3597 ox = x;
3598 base = new;
3599 }
3600
3601 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3602 memcpy(buf+ib, new.c, sl);
3603 ib += sl;
3604 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3605 }
3606 if(ib > 0)
3607 xdraws(buf, base, ox, y, ic, ib);
3608 }
3609 xdrawcursor();
3610 }
3611
3612 void
3613 expose(XEvent *ev) {
3614 XExposeEvent *e = &ev->xexpose;
3615
3616 if(xw.state & WIN_REDRAW) {
3617 if(!e->count)
3618 xw.state &= ~WIN_REDRAW;
3619 }
3620 redraw(0);
3621 }
3622
3623 void
3624 visibility(XEvent *ev) {
3625 XVisibilityEvent *e = &ev->xvisibility;
3626
3627 if(e->state == VisibilityFullyObscured) {
3628 xw.state &= ~WIN_VISIBLE;
3629 } else if(!(xw.state & WIN_VISIBLE)) {
3630 /* need a full redraw for next Expose, not just a buf copy */
3631 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3632 }
3633 }
3634
3635 void
3636 unmap(XEvent *ev) {
3637 xw.state &= ~WIN_VISIBLE;
3638 }
3639
3640 void
3641 xsetpointermotion(int set) {
3642 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3643 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3644 }
3645
3646 void
3647 xseturgency(int add) {
3648 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3649
3650 MODBIT(h->flags, add, XUrgencyHint);
3651 XSetWMHints(xw.dpy, xw.win, h);
3652 XFree(h);
3653 }
3654
3655 void
3656 focus(XEvent *ev) {
3657 XFocusChangeEvent *e = &ev->xfocus;
3658
3659 if(e->mode == NotifyGrab)
3660 return;
3661
3662 if(ev->type == FocusIn) {
3663 XSetICFocus(xw.xic);
3664 xw.state |= WIN_FOCUSED;
3665 xseturgency(0);
3666 if(IS_SET(MODE_FOCUS))
3667 ttywrite("\033[I", 3);
3668 } else {
3669 XUnsetICFocus(xw.xic);
3670 xw.state &= ~WIN_FOCUSED;
3671 if(IS_SET(MODE_FOCUS))
3672 ttywrite("\033[O", 3);
3673 }
3674 }
3675
3676 static inline bool
3677 match(uint mask, uint state) {
3678 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3679 }
3680
3681 void
3682 numlock(const Arg *dummy) {
3683 term.numlock ^= 1;
3684 }
3685
3686 char*
3687 kmap(KeySym k, uint state) {
3688 Key *kp;
3689 int i;
3690
3691 /* Check for mapped keys out of X11 function keys. */
3692 for(i = 0; i < LEN(mappedkeys); i++) {
3693 if(mappedkeys[i] == k)
3694 break;
3695 }
3696 if(i == LEN(mappedkeys)) {
3697 if((k & 0xFFFF) < 0xFD00)
3698 return NULL;
3699 }
3700
3701 for(kp = key; kp < key + LEN(key); kp++) {
3702 if(kp->k != k)
3703 continue;
3704
3705 if(!match(kp->mask, state))
3706 continue;
3707
3708 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3709 continue;
3710 if(term.numlock && kp->appkey == 2)
3711 continue;
3712
3713 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3714 continue;
3715
3716 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3717 continue;
3718
3719 return kp->s;
3720 }
3721
3722 return NULL;
3723 }
3724
3725 void
3726 kpress(XEvent *ev) {
3727 XKeyEvent *e = &ev->xkey;
3728 KeySym ksym;
3729 char buf[32], *customkey;
3730 int len;
3731 long c;
3732 Status status;
3733 Shortcut *bp;
3734
3735 if(IS_SET(MODE_KBDLOCK))
3736 return;
3737
3738 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3739 /* 1. shortcuts */
3740 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3741 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3742 bp->func(&(bp->arg));
3743 return;
3744 }
3745 }
3746
3747 /* 2. custom keys from config.h */
3748 if((customkey = kmap(ksym, e->state))) {
3749 ttysend(customkey, strlen(customkey));
3750 return;
3751 }
3752
3753 /* 3. composed string from input method */
3754 if(len == 0)
3755 return;
3756 if(len == 1 && e->state & Mod1Mask) {
3757 if(IS_SET(MODE_8BIT)) {
3758 if(*buf < 0177) {
3759 c = *buf | 0x80;
3760 len = utf8encode(c, buf, UTF_SIZ);
3761 }
3762 } else {
3763 buf[1] = buf[0];
3764 buf[0] = '\033';
3765 len = 2;
3766 }
3767 }
3768 ttysend(buf, len);
3769 }
3770
3771
3772 void
3773 cmessage(XEvent *e) {
3774 /*
3775 * See xembed specs
3776 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3777 */
3778 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3779 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3780 xw.state |= WIN_FOCUSED;
3781 xseturgency(0);
3782 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3783 xw.state &= ~WIN_FOCUSED;
3784 }
3785 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3786 /* Send SIGHUP to shell */
3787 kill(pid, SIGHUP);
3788 exit(EXIT_SUCCESS);
3789 }
3790 }
3791
3792 void
3793 cresize(int width, int height) {
3794 int col, row;
3795
3796 if(width != 0)
3797 xw.w = width;
3798 if(height != 0)
3799 xw.h = height;
3800
3801 col = (xw.w - 2 * borderpx) / xw.cw;
3802 row = (xw.h - 2 * borderpx) / xw.ch;
3803
3804 tresize(col, row);
3805 xresize(col, row);
3806 ttyresize();
3807 }
3808
3809 void
3810 resize(XEvent *e) {
3811 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3812 return;
3813
3814 cresize(e->xconfigure.width, e->xconfigure.height);
3815 }
3816
3817 void
3818 run(void) {
3819 XEvent ev;
3820 int w = xw.w, h = xw.h;
3821 fd_set rfd;
3822 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3823 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3824 long deltatime;
3825
3826 /* Waiting for window mapping */
3827 while(1) {
3828 XNextEvent(xw.dpy, &ev);
3829 if(XFilterEvent(&ev, None))
3830 continue;
3831 if(ev.type == ConfigureNotify) {
3832 w = ev.xconfigure.width;
3833 h = ev.xconfigure.height;
3834 } else if(ev.type == MapNotify) {
3835 break;
3836 }
3837 }
3838
3839 ttynew();
3840 cresize(w, h);
3841
3842 clock_gettime(CLOCK_MONOTONIC, &last);
3843 lastblink = last;
3844
3845 for(xev = actionfps;;) {
3846 FD_ZERO(&rfd);
3847 FD_SET(cmdfd, &rfd);
3848 FD_SET(xfd, &rfd);
3849
3850 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3851 if(errno == EINTR)
3852 continue;
3853 die("select failed: %s\n", strerror(errno));
3854 }
3855 if(FD_ISSET(cmdfd, &rfd)) {
3856 ttyread();
3857 if(blinktimeout) {
3858 blinkset = tattrset(ATTR_BLINK);
3859 if(!blinkset)
3860 MODBIT(term.mode, 0, MODE_BLINK);
3861 }
3862 }
3863
3864 if(FD_ISSET(xfd, &rfd))
3865 xev = actionfps;
3866
3867 clock_gettime(CLOCK_MONOTONIC, &now);
3868 drawtimeout.tv_sec = 0;
3869 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3870 tv = &drawtimeout;
3871
3872 dodraw = 0;
3873 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3874 tsetdirtattr(ATTR_BLINK);
3875 term.mode ^= MODE_BLINK;
3876 lastblink = now;
3877 dodraw = 1;
3878 }
3879 deltatime = TIMEDIFF(now, last);
3880 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3881 || deltatime < 0) {
3882 dodraw = 1;
3883 last = now;
3884 }
3885
3886 if(dodraw) {
3887 while(XPending(xw.dpy)) {
3888 XNextEvent(xw.dpy, &ev);
3889 if(XFilterEvent(&ev, None))
3890 continue;
3891 if(handler[ev.type])
3892 (handler[ev.type])(&ev);
3893 }
3894
3895 draw();
3896 XFlush(xw.dpy);
3897
3898 if(xev && !FD_ISSET(xfd, &rfd))
3899 xev--;
3900 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3901 if(blinkset) {
3902 if(TIMEDIFF(now, lastblink) \
3903 > blinktimeout) {
3904 drawtimeout.tv_nsec = 1000;
3905 } else {
3906 drawtimeout.tv_nsec = (1E6 * \
3907 (blinktimeout - \
3908 TIMEDIFF(now,
3909 lastblink)));
3910 }
3911 } else {
3912 tv = NULL;
3913 }
3914 }
3915 }
3916 }
3917 }
3918
3919 void
3920 usage(void) {
3921 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3922 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
3923 " [-i] [-t title] [-w windowid] [-e command ...]\n", argv0);
3924 }
3925
3926 int
3927 main(int argc, char *argv[]) {
3928 char *titles;
3929 uint cols = 80, rows = 24;
3930
3931 xw.l = xw.t = 0;
3932 xw.isfixed = False;
3933
3934 ARGBEGIN {
3935 case 'a':
3936 allowaltscreen = false;
3937 break;
3938 case 'c':
3939 opt_class = EARGF(usage());
3940 break;
3941 case 'e':
3942 /* eat all remaining arguments */
3943 if(argc > 1) {
3944 opt_cmd = &argv[1];
3945 if(argv[1] != NULL && opt_title == NULL) {
3946 titles = xstrdup(argv[1]);
3947 opt_title = basename(titles);
3948 }
3949 }
3950 goto run;
3951 case 'f':
3952 opt_font = EARGF(usage());
3953 break;
3954 case 'g':
3955 xw.gm = XParseGeometry(EARGF(usage()),
3956 &xw.l, &xw.t, &cols, &rows);
3957 break;
3958 case 'i':
3959 xw.isfixed = True;
3960 break;
3961 case 'o':
3962 opt_io = EARGF(usage());
3963 break;
3964 case 't':
3965 opt_title = EARGF(usage());
3966 break;
3967 case 'w':
3968 opt_embed = EARGF(usage());
3969 break;
3970 case 'v':
3971 default:
3972 usage();
3973 } ARGEND;
3974
3975 run:
3976 setlocale(LC_CTYPE, "");
3977 XSetLocaleModifiers("");
3978 tnew(cols? cols : 1, rows? rows : 1);
3979 xinit();
3980 selinit();
3981 run();
3982
3983 return 0;
3984 }
3985