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