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Refactor selsnap SNAP_WORD.
[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))
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_usec-t2.tv_usec)/1000)
80 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
81 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
82
83 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
84 #define IS_TRUECOL(x) (1 << 24 & (x))
85 #define TRUERED(x) (((x) & 0xff0000) >> 8)
86 #define TRUEGREEN(x) (((x) & 0xff00))
87 #define TRUEBLUE(x) (((x) & 0xff) << 8)
88
89
90 #define VT102ID "\033[?6c"
91
92 enum glyph_attribute {
93 ATTR_NULL = 0,
94 ATTR_REVERSE = 1,
95 ATTR_UNDERLINE = 2,
96 ATTR_BOLD = 4,
97 ATTR_ITALIC = 8,
98 ATTR_BLINK = 16,
99 ATTR_WRAP = 32,
100 ATTR_WIDE = 64,
101 ATTR_WDUMMY = 128,
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,
117 MODE_INSERT = 2,
118 MODE_APPKEYPAD = 4,
119 MODE_ALTSCREEN = 8,
120 MODE_CRLF = 16,
121 MODE_MOUSEBTN = 32,
122 MODE_MOUSEMOTION = 64,
123 MODE_REVERSE = 128,
124 MODE_KBDLOCK = 256,
125 MODE_HIDE = 512,
126 MODE_ECHO = 1024,
127 MODE_APPCURSOR = 2048,
128 MODE_MOUSESGR = 4096,
129 MODE_8BIT = 8192,
130 MODE_BLINK = 16384,
131 MODE_FBLINK = 32768,
132 MODE_FOCUS = 65536,
133 MODE_MOUSEX10 = 131072,
134 MODE_MOUSEMANY = 262144,
135 MODE_BRCKTPASTE = 524288,
136 MODE_PRINT = 1048576,
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 typedef Colormap Colormap;
184
185 typedef struct {
186 char c[UTF_SIZ]; /* character code */
187 ushort mode; /* attribute flags */
188 uint32_t fg; /* foreground */
189 uint32_t bg; /* background */
190 } Glyph;
191
192 typedef Glyph *Line;
193
194 typedef struct {
195 Glyph attr; /* current char attributes */
196 int x;
197 int y;
198 char state;
199 } TCursor;
200
201 /* CSI Escape sequence structs */
202 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
203 typedef struct {
204 char buf[ESC_BUF_SIZ]; /* raw string */
205 int len; /* raw string length */
206 char priv;
207 int arg[ESC_ARG_SIZ];
208 int narg; /* nb of args */
209 char mode;
210 } CSIEscape;
211
212 /* STR Escape sequence structs */
213 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
214 typedef struct {
215 char type; /* ESC type ... */
216 char buf[STR_BUF_SIZ]; /* raw string */
217 int len; /* raw string length */
218 char *args[STR_ARG_SIZ];
219 int narg; /* nb of args */
220 } STREscape;
221
222 /* Internal representation of the screen */
223 typedef struct {
224 int row; /* nb row */
225 int col; /* nb col */
226 Line *line; /* screen */
227 Line *alt; /* alternate screen */
228 bool *dirty; /* dirtyness of lines */
229 TCursor c; /* cursor */
230 int top; /* top scroll limit */
231 int bot; /* bottom scroll limit */
232 int mode; /* terminal mode flags */
233 int esc; /* escape state flags */
234 char trantbl[4]; /* charset table translation */
235 int charset; /* current charset */
236 int icharset; /* selected charset for sequence */
237 bool numlock; /* lock numbers in keyboard */
238 bool *tabs;
239 } Term;
240
241 /* Purely graphic info */
242 typedef struct {
243 Display *dpy;
244 Colormap cmap;
245 Window win;
246 Drawable buf;
247 Atom xembed, wmdeletewin, netwmname, netwmpid;
248 XIM xim;
249 XIC xic;
250 Draw draw;
251 Visual *vis;
252 XSetWindowAttributes attrs;
253 int scr;
254 bool isfixed; /* is fixed geometry? */
255 int l, t; /* left and top offset */
256 int gm; /* geometry mask */
257 int tw, th; /* tty width and height */
258 int w, h; /* window width and height */
259 int ch; /* char height */
260 int cw; /* char width */
261 char state; /* focus, redraw, visible */
262 } XWindow;
263
264 typedef struct {
265 uint b;
266 uint mask;
267 char *s;
268 } Mousekey;
269
270 typedef struct {
271 KeySym k;
272 uint mask;
273 char *s;
274 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
275 signed char appkey; /* application keypad */
276 signed char appcursor; /* application cursor */
277 signed char crlf; /* crlf mode */
278 } Key;
279
280 typedef struct {
281 int mode;
282 int type;
283 int snap;
284 /*
285 * Selection variables:
286 * nb – normalized coordinates of the beginning of the selection
287 * ne – normalized coordinates of the end of the selection
288 * ob – original coordinates of the beginning of the selection
289 * oe – original coordinates of the end of the selection
290 */
291 struct {
292 int x, y;
293 } nb, ne, ob, oe;
294
295 char *clip;
296 Atom xtarget;
297 bool alt;
298 struct timeval tclick1;
299 struct timeval tclick2;
300 } Selection;
301
302 typedef union {
303 int i;
304 uint ui;
305 float f;
306 const void *v;
307 } Arg;
308
309 typedef struct {
310 uint mod;
311 KeySym keysym;
312 void (*func)(const Arg *);
313 const Arg arg;
314 } Shortcut;
315
316 /* function definitions used in config.h */
317 static void clippaste(const Arg *);
318 static void numlock(const Arg *);
319 static void selpaste(const Arg *);
320 static void xzoom(const Arg *);
321 static void printsel(const Arg *);
322 static void printscreen(const Arg *) ;
323 static void toggleprinter(const Arg *);
324
325 /* Config.h for applying patches and the configuration. */
326 #include "config.h"
327
328 /* Font structure */
329 typedef struct {
330 int height;
331 int width;
332 int ascent;
333 int descent;
334 short lbearing;
335 short rbearing;
336 XftFont *match;
337 FcFontSet *set;
338 FcPattern *pattern;
339 } Font;
340
341 /* Drawing Context */
342 typedef struct {
343 Color col[MAX(LEN(colorname), 256)];
344 Font font, bfont, ifont, ibfont;
345 GC gc;
346 } DC;
347
348 static void die(const char *, ...);
349 static void draw(void);
350 static void redraw(int);
351 static void drawregion(int, int, int, int);
352 static void execsh(void);
353 static void sigchld(int);
354 static void run(void);
355
356 static void csidump(void);
357 static void csihandle(void);
358 static void csiparse(void);
359 static void csireset(void);
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 void tmoveto(int, int);
377 static void tmoveato(int, int);
378 static void tnew(int, int);
379 static void tnewline(int);
380 static void tputtab(int);
381 static void tputc(char *, int);
382 static void treset(void);
383 static int tresize(int, int);
384 static void tscrollup(int, int);
385 static void tscrolldown(int, int);
386 static void tsetattr(int *, int);
387 static void tsetchar(char *, Glyph *, int, int);
388 static void tsetscroll(int, int);
389 static void tswapscreen(void);
390 static void tsetdirt(int, int);
391 static void tsetdirtattr(int);
392 static void tsetmode(bool, bool, int *, int);
393 static void tfulldirt(void);
394 static void techo(char *, int);
395 static void tcontrolcode(uchar );
396 static void tdectest(char );
397 static int32_t tdefcolor(int *, int *, int);
398 static void tdeftran(char);
399 static inline bool match(uint, uint);
400 static void ttynew(void);
401 static void ttyread(void);
402 static void ttyresize(void);
403 static void ttysend(char *, size_t);
404 static void ttywrite(const char *, size_t);
405
406 static void xdraws(char *, Glyph, int, int, int, int);
407 static void xhints(void);
408 static void xclear(int, int, int, int);
409 static void xdrawcursor(void);
410 static void xinit(void);
411 static void xloadcols(void);
412 static int xsetcolorname(int, const char *);
413 static int xgeommasktogravity(int);
414 static int xloadfont(Font *, FcPattern *);
415 static void xloadfonts(char *, double);
416 static int xloadfontset(Font *);
417 static void xsettitle(char *);
418 static void xresettitle(void);
419 static void xsetpointermotion(int);
420 static void xseturgency(int);
421 static void xsetsel(char *);
422 static void xtermclear(int, int, int, int);
423 static void xunloadfont(Font *);
424 static void xunloadfonts(void);
425 static void xresize(int, int);
426
427 static void expose(XEvent *);
428 static void visibility(XEvent *);
429 static void unmap(XEvent *);
430 static char *kmap(KeySym, uint);
431 static void kpress(XEvent *);
432 static void cmessage(XEvent *);
433 static void cresize(int, int);
434 static void resize(XEvent *);
435 static void focus(XEvent *);
436 static void brelease(XEvent *);
437 static void bpress(XEvent *);
438 static void bmotion(XEvent *);
439 static void selnotify(XEvent *);
440 static void selclear(XEvent *);
441 static void selrequest(XEvent *);
442
443 static void selinit(void);
444 static void selnormalize(void);
445 static inline bool selected(int, int);
446 static char *getsel(void);
447 static void selcopy(void);
448 static void selscroll(int, int);
449 static void selsnap(int, int *, int *, int);
450 static void getbuttoninfo(XEvent *);
451 static void mousereport(XEvent *);
452
453 static size_t utf8decode(char *, long *, size_t);
454 static long utf8decodebyte(char, size_t *);
455 static size_t utf8encode(long, char *, size_t);
456 static char utf8encodebyte(long, size_t);
457 static size_t utf8len(char *);
458 static size_t utf8validate(long *, size_t);
459
460 static ssize_t xwrite(int, const char *, size_t);
461 static void *xmalloc(size_t);
462 static void *xrealloc(void *, size_t);
463 static char *xstrdup(char *);
464
465 static void usage(void);
466
467 static void (*handler[LASTEvent])(XEvent *) = {
468 [KeyPress] = kpress,
469 [ClientMessage] = cmessage,
470 [ConfigureNotify] = resize,
471 [VisibilityNotify] = visibility,
472 [UnmapNotify] = unmap,
473 [Expose] = expose,
474 [FocusIn] = focus,
475 [FocusOut] = focus,
476 [MotionNotify] = bmotion,
477 [ButtonPress] = bpress,
478 [ButtonRelease] = brelease,
479 [SelectionClear] = selclear,
480 [SelectionNotify] = selnotify,
481 [SelectionRequest] = selrequest,
482 };
483
484 /* Globals */
485 static DC dc;
486 static XWindow xw;
487 static Term term;
488 static CSIEscape csiescseq;
489 static STREscape strescseq;
490 static int cmdfd;
491 static pid_t pid;
492 static Selection sel;
493 static int iofd = STDOUT_FILENO;
494 static char **opt_cmd = NULL;
495 static char *opt_io = NULL;
496 static char *opt_title = NULL;
497 static char *opt_embed = NULL;
498 static char *opt_class = NULL;
499 static char *opt_font = NULL;
500 static int oldbutton = 3; /* button event on startup: 3 = release */
501
502 static char *usedfont = NULL;
503 static double usedfontsize = 0;
504
505 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
506 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
507 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
508 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
509
510 /* Font Ring Cache */
511 enum {
512 FRC_NORMAL,
513 FRC_ITALIC,
514 FRC_BOLD,
515 FRC_ITALICBOLD
516 };
517
518 typedef struct {
519 XftFont *font;
520 int flags;
521 } Fontcache;
522
523 /* Fontcache is an array now. A new font will be appended to the array. */
524 static Fontcache frc[16];
525 static int frclen = 0;
526
527 ssize_t
528 xwrite(int fd, const char *s, size_t len) {
529 size_t aux = len;
530
531 while(len > 0) {
532 ssize_t r = write(fd, s, len);
533 if(r < 0)
534 return r;
535 len -= r;
536 s += r;
537 }
538 return aux;
539 }
540
541 void *
542 xmalloc(size_t len) {
543 void *p = malloc(len);
544
545 if(!p)
546 die("Out of memory\n");
547
548 return p;
549 }
550
551 void *
552 xrealloc(void *p, size_t len) {
553 if((p = realloc(p, len)) == NULL)
554 die("Out of memory\n");
555
556 return p;
557 }
558
559 char *
560 xstrdup(char *s) {
561 if((s = strdup(s)) == NULL)
562 die("Out of memory\n");
563
564 return s;
565 }
566
567 size_t
568 utf8decode(char *c, long *u, size_t clen) {
569 size_t i, j, len, type;
570 long udecoded;
571
572 *u = UTF_INVALID;
573 if(!clen)
574 return 0;
575 udecoded = utf8decodebyte(c[0], &len);
576 if(!BETWEEN(len, 1, UTF_SIZ))
577 return 1;
578 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
579 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
580 if(type != 0)
581 return j;
582 }
583 if(j < len)
584 return 0;
585 *u = udecoded;
586 utf8validate(u, len);
587 return len;
588 }
589
590 long
591 utf8decodebyte(char c, size_t *i) {
592 for(*i = 0; *i < LEN(utfmask); ++(*i))
593 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
594 return (uchar)c & ~utfmask[*i];
595 return 0;
596 }
597
598 size_t
599 utf8encode(long u, char *c, size_t clen) {
600 size_t len, i;
601
602 len = utf8validate(&u, 0);
603 if(clen < len)
604 return 0;
605 for(i = len - 1; i != 0; --i) {
606 c[i] = utf8encodebyte(u, 0);
607 u >>= 6;
608 }
609 c[0] = utf8encodebyte(u, len);
610 return len;
611 }
612
613 char
614 utf8encodebyte(long u, size_t i) {
615 return utfbyte[i] | (u & ~utfmask[i]);
616 }
617
618 size_t
619 utf8len(char *c) {
620 return utf8decode(c, &(long){0}, UTF_SIZ);
621 }
622
623 size_t
624 utf8validate(long *u, size_t i) {
625 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
626 *u = UTF_INVALID;
627 for(i = 1; *u > utfmax[i]; ++i)
628 ;
629 return i;
630 }
631
632 static void
633 selinit(void) {
634 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
635 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
636 sel.mode = 0;
637 sel.ob.x = -1;
638 sel.clip = NULL;
639 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
640 if(sel.xtarget == None)
641 sel.xtarget = XA_STRING;
642 }
643
644 static int
645 x2col(int x) {
646 x -= borderpx;
647 x /= xw.cw;
648
649 return LIMIT(x, 0, term.col-1);
650 }
651
652 static int
653 y2row(int y) {
654 y -= borderpx;
655 y /= xw.ch;
656
657 return LIMIT(y, 0, term.row-1);
658 }
659
660 static int tlinelen(int y) {
661 int i = term.col;
662
663 while (i > 0 && term.line[y][i - 1].c[0] == ' ')
664 --i;
665
666 return i;
667 }
668
669 static void
670 selnormalize(void) {
671 int i;
672
673 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
674 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
675 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
676 } else {
677 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
678 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
679 }
680 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
681 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
682
683 /* expand selection over line breaks */
684 if (sel.type == SEL_RECTANGULAR)
685 return;
686 i = tlinelen(sel.nb.y);
687 if (i < sel.nb.x)
688 sel.nb.x = i;
689 if (tlinelen(sel.ne.y) <= sel.ne.x)
690 sel.ne.x = term.col - 1;
691 }
692
693 static inline bool
694 selected(int x, int y) {
695 if(sel.type == SEL_RECTANGULAR)
696 return BETWEEN(y, sel.nb.y, sel.ne.y)
697 && BETWEEN(x, sel.nb.x, sel.ne.x);
698
699 return BETWEEN(y, sel.nb.y, sel.ne.y)
700 && (y != sel.nb.y || x >= sel.nb.x)
701 && (y != sel.ne.y || x <= sel.ne.x);
702 }
703
704 void
705 selsnap(int mode, int *x, int *y, int direction) {
706 int newx, newy, xt, yt;
707 Glyph *gp;
708
709 switch(mode) {
710 case SNAP_WORD:
711 /*
712 * Snap around if the word wraps around at the end or
713 * beginning of a line.
714 */
715 for(;;) {
716 newx = *x + direction;
717 newy = *y;
718 if(!BETWEEN(newx, 0, term.col - 1)) {
719 newy += direction;
720 newx = (newx + term.col) % term.col;
721 if (!BETWEEN(newy, 0, term.row - 1))
722 break;
723
724 if(direction > 0)
725 yt = *y, xt = *x;
726 else
727 yt = newy, xt = newx;
728 if(!(term.line[yt][xt].mode & ATTR_WRAP))
729 break;
730 }
731
732 if (newx >= tlinelen(newy))
733 break;
734
735 gp = &term.line[newy][newx];
736 if (!(gp->mode & ATTR_WDUMMY) && strchr(worddelimiters, gp->c[0]))
737 break;
738
739 *x = newx;
740 *y = newy;
741 }
742 break;
743 case SNAP_LINE:
744 /*
745 * Snap around if the the previous line or the current one
746 * has set ATTR_WRAP at its end. Then the whole next or
747 * previous line will be selected.
748 */
749 *x = (direction < 0) ? 0 : term.col - 1;
750 if(direction < 0 && *y > 0) {
751 for(; *y > 0; *y += direction) {
752 if(!(term.line[*y-1][term.col-1].mode
753 & ATTR_WRAP)) {
754 break;
755 }
756 }
757 } else if(direction > 0 && *y < term.row-1) {
758 for(; *y < term.row; *y += direction) {
759 if(!(term.line[*y][term.col-1].mode
760 & ATTR_WRAP)) {
761 break;
762 }
763 }
764 }
765 break;
766 }
767 }
768
769 void
770 getbuttoninfo(XEvent *e) {
771 int type;
772 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
773
774 sel.alt = IS_SET(MODE_ALTSCREEN);
775
776 sel.oe.x = x2col(e->xbutton.x);
777 sel.oe.y = y2row(e->xbutton.y);
778
779 if(sel.ob.y < sel.oe.y
780 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
781 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
782 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
783 } else {
784 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
785 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
786 }
787 selnormalize();
788
789 sel.type = SEL_REGULAR;
790 for(type = 1; type < LEN(selmasks); ++type) {
791 if(match(selmasks[type], state)) {
792 sel.type = type;
793 break;
794 }
795 }
796 }
797
798 void
799 mousereport(XEvent *e) {
800 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
801 button = e->xbutton.button, state = e->xbutton.state,
802 len;
803 char buf[40];
804 static int ox, oy;
805
806 /* from urxvt */
807 if(e->xbutton.type == MotionNotify) {
808 if(x == ox && y == oy)
809 return;
810 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
811 return;
812 /* MOUSE_MOTION: no reporting if no button is pressed */
813 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
814 return;
815
816 button = oldbutton + 32;
817 ox = x;
818 oy = y;
819 } else {
820 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
821 button = 3;
822 } else {
823 button -= Button1;
824 if(button >= 3)
825 button += 64 - 3;
826 }
827 if(e->xbutton.type == ButtonPress) {
828 oldbutton = button;
829 ox = x;
830 oy = y;
831 } else if(e->xbutton.type == ButtonRelease) {
832 oldbutton = 3;
833 /* MODE_MOUSEX10: no button release reporting */
834 if(IS_SET(MODE_MOUSEX10))
835 return;
836 if (button == 64 || button == 65)
837 return;
838 }
839 }
840
841 if(!IS_SET(MODE_MOUSEX10)) {
842 button += (state & ShiftMask ? 4 : 0)
843 + (state & Mod4Mask ? 8 : 0)
844 + (state & ControlMask ? 16 : 0);
845 }
846
847 len = 0;
848 if(IS_SET(MODE_MOUSESGR)) {
849 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
850 button, x+1, y+1,
851 e->xbutton.type == ButtonRelease ? 'm' : 'M');
852 } else if(x < 223 && y < 223) {
853 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
854 32+button, 32+x+1, 32+y+1);
855 } else {
856 return;
857 }
858
859 ttywrite(buf, len);
860 }
861
862 void
863 bpress(XEvent *e) {
864 struct timeval now;
865 Mousekey *mk;
866
867 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
868 mousereport(e);
869 return;
870 }
871
872 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
873 if(e->xbutton.button == mk->b
874 && match(mk->mask, e->xbutton.state)) {
875 ttysend(mk->s, strlen(mk->s));
876 return;
877 }
878 }
879
880 if(e->xbutton.button == Button1) {
881 gettimeofday(&now, NULL);
882
883 /* Clear previous selection, logically and visually. */
884 selclear(NULL);
885 sel.mode = 1;
886 sel.type = SEL_REGULAR;
887 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
888 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
889
890 /*
891 * If the user clicks below predefined timeouts specific
892 * snapping behaviour is exposed.
893 */
894 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
895 sel.snap = SNAP_LINE;
896 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
897 sel.snap = SNAP_WORD;
898 } else {
899 sel.snap = 0;
900 }
901 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
902 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
903 selnormalize();
904
905 /*
906 * Draw selection, unless it's regular and we don't want to
907 * make clicks visible
908 */
909 if(sel.snap != 0) {
910 sel.mode++;
911 tsetdirt(sel.nb.y, sel.ne.y);
912 }
913 sel.tclick2 = sel.tclick1;
914 sel.tclick1 = now;
915 }
916 }
917
918 char *
919 getsel(void) {
920 char *str, *ptr;
921 int x, y, bufsize, size, ex;
922 Glyph *gp, *last;
923
924 if(sel.ob.x == -1)
925 return NULL;
926
927 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
928 ptr = str = xmalloc(bufsize);
929
930 /* append every set & selected glyph to the selection */
931 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
932 gp = &term.line[y][0];
933 last = &gp[term.col-1];
934
935 while(last >= gp && !(selected(last - gp, y) &&
936 strcmp(last->c, " ") != 0)) {
937 --last;
938 }
939
940 for(x = 0; gp <= last; x++, ++gp) {
941 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
942 continue;
943
944 size = utf8len(gp->c);
945 memcpy(ptr, gp->c, size);
946 ptr += size;
947 }
948
949 /*
950 * Copy and pasting of line endings is inconsistent
951 * in the inconsistent terminal and GUI world.
952 * The best solution seems like to produce '\n' when
953 * something is copied from st and convert '\n' to
954 * '\r', when something to be pasted is received by
955 * st.
956 * FIXME: Fix the computer world.
957 */
958 if(y < sel.ne.y && !(x > 0 && (gp-1)->mode & ATTR_WRAP))
959 *ptr++ = '\n';
960
961 /*
962 * If the last selected line expands in the selection
963 * after the visible text '\n' is appended.
964 */
965 if(y == sel.ne.y) {
966 ex = sel.ne.x;
967 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
968 ex = sel.nb.x;
969 if(tlinelen(y) < ex)
970 *ptr++ = '\n';
971 }
972 }
973 *ptr = 0;
974 return str;
975 }
976
977 void
978 selcopy(void) {
979 xsetsel(getsel());
980 }
981
982 void
983 selnotify(XEvent *e) {
984 ulong nitems, ofs, rem;
985 int format;
986 uchar *data, *last, *repl;
987 Atom type;
988
989 ofs = 0;
990 do {
991 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
992 False, AnyPropertyType, &type, &format,
993 &nitems, &rem, &data)) {
994 fprintf(stderr, "Clipboard allocation failed\n");
995 return;
996 }
997
998 /*
999 * As seen in getsel:
1000 * Line endings are inconsistent in the terminal and GUI world
1001 * copy and pasting. When receiving some selection data,
1002 * replace all '\n' with '\r'.
1003 * FIXME: Fix the computer world.
1004 */
1005 repl = data;
1006 last = data + nitems * format / 8;
1007 while((repl = memchr(repl, '\n', last - repl))) {
1008 *repl++ = '\r';
1009 }
1010
1011 if(IS_SET(MODE_BRCKTPASTE))
1012 ttywrite("\033[200~", 6);
1013 ttysend((char *)data, nitems * format / 8);
1014 if(IS_SET(MODE_BRCKTPASTE))
1015 ttywrite("\033[201~", 6);
1016 XFree(data);
1017 /* number of 32-bit chunks returned */
1018 ofs += nitems * format / 32;
1019 } while(rem > 0);
1020 }
1021
1022 void
1023 selpaste(const Arg *dummy) {
1024 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1025 xw.win, CurrentTime);
1026 }
1027
1028 void
1029 clippaste(const Arg *dummy) {
1030 Atom clipboard;
1031
1032 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1033 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1034 xw.win, CurrentTime);
1035 }
1036
1037 void
1038 selclear(XEvent *e) {
1039 if(sel.ob.x == -1)
1040 return;
1041 sel.ob.x = -1;
1042 tsetdirt(sel.nb.y, sel.ne.y);
1043 }
1044
1045 void
1046 selrequest(XEvent *e) {
1047 XSelectionRequestEvent *xsre;
1048 XSelectionEvent xev;
1049 Atom xa_targets, string;
1050
1051 xsre = (XSelectionRequestEvent *) e;
1052 xev.type = SelectionNotify;
1053 xev.requestor = xsre->requestor;
1054 xev.selection = xsre->selection;
1055 xev.target = xsre->target;
1056 xev.time = xsre->time;
1057 /* reject */
1058 xev.property = None;
1059
1060 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1061 if(xsre->target == xa_targets) {
1062 /* respond with the supported type */
1063 string = sel.xtarget;
1064 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1065 XA_ATOM, 32, PropModeReplace,
1066 (uchar *) &string, 1);
1067 xev.property = xsre->property;
1068 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1069 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1070 xsre->target, 8, PropModeReplace,
1071 (uchar *) sel.clip, strlen(sel.clip));
1072 xev.property = xsre->property;
1073 }
1074
1075 /* all done, send a notification to the listener */
1076 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1077 fprintf(stderr, "Error sending SelectionNotify event\n");
1078 }
1079
1080 void
1081 xsetsel(char *str) {
1082 /* register the selection for both the clipboard and the primary */
1083 Atom clipboard;
1084
1085 free(sel.clip);
1086 sel.clip = str;
1087
1088 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1089
1090 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1091 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1092 }
1093
1094 void
1095 brelease(XEvent *e) {
1096 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1097 mousereport(e);
1098 return;
1099 }
1100
1101 if(e->xbutton.button == Button2) {
1102 selpaste(NULL);
1103 } else if(e->xbutton.button == Button1) {
1104 if(sel.mode < 2) {
1105 selclear(NULL);
1106 } else {
1107 getbuttoninfo(e);
1108 selcopy();
1109 }
1110 sel.mode = 0;
1111 tsetdirt(sel.nb.y, sel.ne.y);
1112 }
1113 }
1114
1115 void
1116 bmotion(XEvent *e) {
1117 int oldey, oldex, oldsby, oldsey;
1118
1119 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1120 mousereport(e);
1121 return;
1122 }
1123
1124 if(!sel.mode)
1125 return;
1126
1127 sel.mode++;
1128 oldey = sel.oe.y;
1129 oldex = sel.oe.x;
1130 oldsby = sel.nb.y;
1131 oldsey = sel.ne.y;
1132 getbuttoninfo(e);
1133
1134 if(oldey != sel.oe.y || oldex != sel.oe.x)
1135 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1136 }
1137
1138 void
1139 die(const char *errstr, ...) {
1140 va_list ap;
1141
1142 va_start(ap, errstr);
1143 vfprintf(stderr, errstr, ap);
1144 va_end(ap);
1145 exit(EXIT_FAILURE);
1146 }
1147
1148 void
1149 execsh(void) {
1150 char **args;
1151 char *envshell = getenv("SHELL");
1152 const struct passwd *pass = getpwuid(getuid());
1153 char buf[sizeof(long) * 8 + 1];
1154
1155 unsetenv("COLUMNS");
1156 unsetenv("LINES");
1157 unsetenv("TERMCAP");
1158
1159 if(pass) {
1160 setenv("LOGNAME", pass->pw_name, 1);
1161 setenv("USER", pass->pw_name, 1);
1162 setenv("SHELL", pass->pw_shell, 0);
1163 setenv("HOME", pass->pw_dir, 0);
1164 }
1165
1166 snprintf(buf, sizeof(buf), "%lu", xw.win);
1167 setenv("WINDOWID", buf, 1);
1168
1169 signal(SIGCHLD, SIG_DFL);
1170 signal(SIGHUP, SIG_DFL);
1171 signal(SIGINT, SIG_DFL);
1172 signal(SIGQUIT, SIG_DFL);
1173 signal(SIGTERM, SIG_DFL);
1174 signal(SIGALRM, SIG_DFL);
1175
1176 DEFAULT(envshell, shell);
1177 setenv("TERM", termname, 1);
1178 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1179 execvp(args[0], args);
1180 exit(EXIT_FAILURE);
1181 }
1182
1183 void
1184 sigchld(int a) {
1185 int stat = 0;
1186
1187 if(waitpid(pid, &stat, 0) < 0)
1188 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1189
1190 if(WIFEXITED(stat)) {
1191 exit(WEXITSTATUS(stat));
1192 } else {
1193 exit(EXIT_FAILURE);
1194 }
1195 }
1196
1197 void
1198 ttynew(void) {
1199 int m, s;
1200 struct winsize w = {term.row, term.col, 0, 0};
1201
1202 /* seems to work fine on linux, openbsd and freebsd */
1203 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1204 die("openpty failed: %s\n", strerror(errno));
1205
1206 switch(pid = fork()) {
1207 case -1:
1208 die("fork failed\n");
1209 break;
1210 case 0:
1211 setsid(); /* create a new process group */
1212 dup2(s, STDIN_FILENO);
1213 dup2(s, STDOUT_FILENO);
1214 dup2(s, STDERR_FILENO);
1215 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1216 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1217 close(s);
1218 close(m);
1219 execsh();
1220 break;
1221 default:
1222 close(s);
1223 cmdfd = m;
1224 signal(SIGCHLD, sigchld);
1225 if(opt_io) {
1226 term.mode |= MODE_PRINT;
1227 iofd = (!strcmp(opt_io, "-")) ?
1228 STDOUT_FILENO :
1229 open(opt_io, O_WRONLY | O_CREAT, 0666);
1230 if(iofd < 0) {
1231 fprintf(stderr, "Error opening %s:%s\n",
1232 opt_io, strerror(errno));
1233 }
1234 }
1235 break;
1236 }
1237 }
1238
1239 void
1240 ttyread(void) {
1241 static char buf[BUFSIZ];
1242 static int buflen = 0;
1243 char *ptr;
1244 char s[UTF_SIZ];
1245 int charsize; /* size of utf8 char in bytes */
1246 long unicodep;
1247 int ret;
1248
1249 /* append read bytes to unprocessed bytes */
1250 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1251 die("Couldn't read from shell: %s\n", strerror(errno));
1252
1253 /* process every complete utf8 char */
1254 buflen += ret;
1255 ptr = buf;
1256 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1257 utf8encode(unicodep, s, UTF_SIZ);
1258 tputc(s, charsize);
1259 ptr += charsize;
1260 buflen -= charsize;
1261 }
1262
1263 /* keep any uncomplete utf8 char for the next call */
1264 memmove(buf, ptr, buflen);
1265 }
1266
1267 void
1268 ttywrite(const char *s, size_t n) {
1269 if(xwrite(cmdfd, s, n) == -1)
1270 die("write error on tty: %s\n", strerror(errno));
1271 }
1272
1273 void
1274 ttysend(char *s, size_t n) {
1275 ttywrite(s, n);
1276 if(IS_SET(MODE_ECHO))
1277 techo(s, n);
1278 }
1279
1280 void
1281 ttyresize(void) {
1282 struct winsize w;
1283
1284 w.ws_row = term.row;
1285 w.ws_col = term.col;
1286 w.ws_xpixel = xw.tw;
1287 w.ws_ypixel = xw.th;
1288 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1289 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1290 }
1291
1292 int
1293 tattrset(int attr) {
1294 int i, j;
1295
1296 for(i = 0; i < term.row-1; i++) {
1297 for(j = 0; j < term.col-1; j++) {
1298 if(term.line[i][j].mode & attr)
1299 return 1;
1300 }
1301 }
1302
1303 return 0;
1304 }
1305
1306 void
1307 tsetdirt(int top, int bot) {
1308 int i;
1309
1310 LIMIT(top, 0, term.row-1);
1311 LIMIT(bot, 0, term.row-1);
1312
1313 for(i = top; i <= bot; i++)
1314 term.dirty[i] = 1;
1315 }
1316
1317 void
1318 tsetdirtattr(int attr) {
1319 int i, j;
1320
1321 for(i = 0; i < term.row-1; i++) {
1322 for(j = 0; j < term.col-1; j++) {
1323 if(term.line[i][j].mode & attr) {
1324 tsetdirt(i, i);
1325 break;
1326 }
1327 }
1328 }
1329 }
1330
1331 void
1332 tfulldirt(void) {
1333 tsetdirt(0, term.row-1);
1334 }
1335
1336 void
1337 tcursor(int mode) {
1338 static TCursor c[2];
1339 bool alt = IS_SET(MODE_ALTSCREEN);
1340
1341 if(mode == CURSOR_SAVE) {
1342 c[alt] = term.c;
1343 } else if(mode == CURSOR_LOAD) {
1344 term.c = c[alt];
1345 tmoveto(c[alt].x, c[alt].y);
1346 }
1347 }
1348
1349 void
1350 treset(void) {
1351 uint i;
1352
1353 term.c = (TCursor){{
1354 .mode = ATTR_NULL,
1355 .fg = defaultfg,
1356 .bg = defaultbg
1357 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1358
1359 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1360 for(i = tabspaces; i < term.col; i += tabspaces)
1361 term.tabs[i] = 1;
1362 term.top = 0;
1363 term.bot = term.row - 1;
1364 term.mode = MODE_WRAP;
1365 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1366 term.charset = 0;
1367
1368 tclearregion(0, 0, term.col-1, term.row-1);
1369 tmoveto(0, 0);
1370 tcursor(CURSOR_SAVE);
1371 }
1372
1373 void
1374 tnew(int col, int row) {
1375 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1376 tresize(col, row);
1377 term.numlock = 1;
1378
1379 treset();
1380 }
1381
1382 void
1383 tswapscreen(void) {
1384 Line *tmp = term.line;
1385
1386 term.line = term.alt;
1387 term.alt = tmp;
1388 term.mode ^= MODE_ALTSCREEN;
1389 tfulldirt();
1390 }
1391
1392 void
1393 tscrolldown(int orig, int n) {
1394 int i;
1395 Line temp;
1396
1397 LIMIT(n, 0, term.bot-orig+1);
1398
1399 tsetdirt(orig, term.bot-n);
1400 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1401
1402 for(i = term.bot; i >= orig+n; i--) {
1403 temp = term.line[i];
1404 term.line[i] = term.line[i-n];
1405 term.line[i-n] = temp;
1406 }
1407
1408 selscroll(orig, n);
1409 }
1410
1411 void
1412 tscrollup(int orig, int n) {
1413 int i;
1414 Line temp;
1415
1416 LIMIT(n, 0, term.bot-orig+1);
1417
1418 tclearregion(0, orig, term.col-1, orig+n-1);
1419 tsetdirt(orig+n, term.bot);
1420
1421 for(i = orig; i <= term.bot-n; i++) {
1422 temp = term.line[i];
1423 term.line[i] = term.line[i+n];
1424 term.line[i+n] = temp;
1425 }
1426
1427 selscroll(orig, -n);
1428 }
1429
1430 void
1431 selscroll(int orig, int n) {
1432 if(sel.ob.x == -1)
1433 return;
1434
1435 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1436 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1437 selclear(NULL);
1438 return;
1439 }
1440 if(sel.type == SEL_RECTANGULAR) {
1441 if(sel.ob.y < term.top)
1442 sel.ob.y = term.top;
1443 if(sel.oe.y > term.bot)
1444 sel.oe.y = term.bot;
1445 } else {
1446 if(sel.ob.y < term.top) {
1447 sel.ob.y = term.top;
1448 sel.ob.x = 0;
1449 }
1450 if(sel.oe.y > term.bot) {
1451 sel.oe.y = term.bot;
1452 sel.oe.x = term.col;
1453 }
1454 }
1455 selnormalize();
1456 }
1457 }
1458
1459 void
1460 tnewline(int first_col) {
1461 int y = term.c.y;
1462
1463 if(y == term.bot) {
1464 tscrollup(term.top, 1);
1465 } else {
1466 y++;
1467 }
1468 tmoveto(first_col ? 0 : term.c.x, y);
1469 }
1470
1471 void
1472 csiparse(void) {
1473 char *p = csiescseq.buf, *np;
1474 long int v;
1475
1476 csiescseq.narg = 0;
1477 if(*p == '?') {
1478 csiescseq.priv = 1;
1479 p++;
1480 }
1481
1482 csiescseq.buf[csiescseq.len] = '\0';
1483 while(p < csiescseq.buf+csiescseq.len) {
1484 np = NULL;
1485 v = strtol(p, &np, 10);
1486 if(np == p)
1487 v = 0;
1488 if(v == LONG_MAX || v == LONG_MIN)
1489 v = -1;
1490 csiescseq.arg[csiescseq.narg++] = v;
1491 p = np;
1492 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1493 break;
1494 p++;
1495 }
1496 csiescseq.mode = *p;
1497 }
1498
1499 /* for absolute user moves, when decom is set */
1500 void
1501 tmoveato(int x, int y) {
1502 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1503 }
1504
1505 void
1506 tmoveto(int x, int y) {
1507 int miny, maxy;
1508
1509 if(term.c.state & CURSOR_ORIGIN) {
1510 miny = term.top;
1511 maxy = term.bot;
1512 } else {
1513 miny = 0;
1514 maxy = term.row - 1;
1515 }
1516 LIMIT(x, 0, term.col-1);
1517 LIMIT(y, miny, maxy);
1518 term.c.state &= ~CURSOR_WRAPNEXT;
1519 term.c.x = x;
1520 term.c.y = y;
1521 }
1522
1523 void
1524 tsetchar(char *c, Glyph *attr, int x, int y) {
1525 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1526 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1527 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1528 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1529 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1530 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1531 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1532 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1533 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1534 };
1535
1536 /*
1537 * The table is proudly stolen from rxvt.
1538 */
1539 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1540 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1541 c = vt100_0[c[0] - 0x41];
1542 }
1543 }
1544
1545 if(term.line[y][x].mode & ATTR_WIDE) {
1546 if(x+1 < term.col) {
1547 term.line[y][x+1].c[0] = ' ';
1548 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1549 }
1550 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1551 term.line[y][x-1].c[0] = ' ';
1552 term.line[y][x-1].mode &= ~ATTR_WIDE;
1553 }
1554
1555 term.dirty[y] = 1;
1556 term.line[y][x] = *attr;
1557 memcpy(term.line[y][x].c, c, UTF_SIZ);
1558 }
1559
1560 void
1561 tclearregion(int x1, int y1, int x2, int y2) {
1562 int x, y, temp;
1563
1564 if(x1 > x2)
1565 temp = x1, x1 = x2, x2 = temp;
1566 if(y1 > y2)
1567 temp = y1, y1 = y2, y2 = temp;
1568
1569 LIMIT(x1, 0, term.col-1);
1570 LIMIT(x2, 0, term.col-1);
1571 LIMIT(y1, 0, term.row-1);
1572 LIMIT(y2, 0, term.row-1);
1573
1574 for(y = y1; y <= y2; y++) {
1575 term.dirty[y] = 1;
1576 for(x = x1; x <= x2; x++) {
1577 if(selected(x, y))
1578 selclear(NULL);
1579 term.line[y][x] = term.c.attr;
1580 memcpy(term.line[y][x].c, " ", 2);
1581 }
1582 }
1583 }
1584
1585 void
1586 tdeletechar(int n) {
1587 int dst, src, size;
1588 Glyph *line;
1589
1590 LIMIT(n, 0, term.col - term.c.x);
1591
1592 dst = term.c.x;
1593 src = term.c.x + n;
1594 size = term.col - src;
1595 line = term.line[term.c.y];
1596
1597 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1598 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1599 }
1600
1601 void
1602 tinsertblank(int n) {
1603 int dst, src, size;
1604 Glyph *line;
1605
1606 LIMIT(n, 0, term.col - term.c.x);
1607
1608 dst = term.c.x + n;
1609 src = term.c.x;
1610 size = term.col - dst;
1611 line = term.line[term.c.y];
1612
1613 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1614 tclearregion(src, term.c.y, dst - 1, term.c.y);
1615 }
1616
1617 void
1618 tinsertblankline(int n) {
1619 if(BETWEEN(term.c.y, term.top, term.bot))
1620 tscrolldown(term.c.y, n);
1621 }
1622
1623 void
1624 tdeleteline(int n) {
1625 if(BETWEEN(term.c.y, term.top, term.bot))
1626 tscrollup(term.c.y, n);
1627 }
1628
1629 int32_t
1630 tdefcolor(int *attr, int *npar, int l) {
1631 int32_t idx = -1;
1632 uint r, g, b;
1633
1634 switch (attr[*npar + 1]) {
1635 case 2: /* direct color in RGB space */
1636 if (*npar + 4 >= l) {
1637 fprintf(stderr,
1638 "erresc(38): Incorrect number of parameters (%d)\n",
1639 *npar);
1640 break;
1641 }
1642 r = attr[*npar + 2];
1643 g = attr[*npar + 3];
1644 b = attr[*npar + 4];
1645 *npar += 4;
1646 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1647 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1648 r, g, b);
1649 else
1650 idx = TRUECOLOR(r, g, b);
1651 break;
1652 case 5: /* indexed color */
1653 if (*npar + 2 >= l) {
1654 fprintf(stderr,
1655 "erresc(38): Incorrect number of parameters (%d)\n",
1656 *npar);
1657 break;
1658 }
1659 *npar += 2;
1660 if(!BETWEEN(attr[*npar], 0, 255))
1661 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1662 else
1663 idx = attr[*npar];
1664 break;
1665 case 0: /* implemented defined (only foreground) */
1666 case 1: /* transparent */
1667 case 3: /* direct color in CMY space */
1668 case 4: /* direct color in CMYK space */
1669 default:
1670 fprintf(stderr,
1671 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1672 break;
1673 }
1674
1675 return idx;
1676 }
1677
1678 void
1679 tsetattr(int *attr, int l) {
1680 int i;
1681 int32_t idx;
1682
1683 for(i = 0; i < l; i++) {
1684 switch(attr[i]) {
1685 case 0:
1686 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1687 | ATTR_BOLD | ATTR_ITALIC \
1688 | ATTR_BLINK);
1689 term.c.attr.fg = defaultfg;
1690 term.c.attr.bg = defaultbg;
1691 break;
1692 case 1:
1693 term.c.attr.mode |= ATTR_BOLD;
1694 break;
1695 case 3:
1696 term.c.attr.mode |= ATTR_ITALIC;
1697 break;
1698 case 4:
1699 term.c.attr.mode |= ATTR_UNDERLINE;
1700 break;
1701 case 5: /* slow blink */
1702 case 6: /* rapid blink */
1703 term.c.attr.mode |= ATTR_BLINK;
1704 break;
1705 case 7:
1706 term.c.attr.mode |= ATTR_REVERSE;
1707 break;
1708 case 21:
1709 case 22:
1710 term.c.attr.mode &= ~ATTR_BOLD;
1711 break;
1712 case 23:
1713 term.c.attr.mode &= ~ATTR_ITALIC;
1714 break;
1715 case 24:
1716 term.c.attr.mode &= ~ATTR_UNDERLINE;
1717 break;
1718 case 25:
1719 case 26:
1720 term.c.attr.mode &= ~ATTR_BLINK;
1721 break;
1722 case 27:
1723 term.c.attr.mode &= ~ATTR_REVERSE;
1724 break;
1725 case 38:
1726 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1727 term.c.attr.fg = idx;
1728 break;
1729 case 39:
1730 term.c.attr.fg = defaultfg;
1731 break;
1732 case 48:
1733 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1734 term.c.attr.bg = idx;
1735 break;
1736 case 49:
1737 term.c.attr.bg = defaultbg;
1738 break;
1739 default:
1740 if(BETWEEN(attr[i], 30, 37)) {
1741 term.c.attr.fg = attr[i] - 30;
1742 } else if(BETWEEN(attr[i], 40, 47)) {
1743 term.c.attr.bg = attr[i] - 40;
1744 } else if(BETWEEN(attr[i], 90, 97)) {
1745 term.c.attr.fg = attr[i] - 90 + 8;
1746 } else if(BETWEEN(attr[i], 100, 107)) {
1747 term.c.attr.bg = attr[i] - 100 + 8;
1748 } else {
1749 fprintf(stderr,
1750 "erresc(default): gfx attr %d unknown\n",
1751 attr[i]), csidump();
1752 }
1753 break;
1754 }
1755 }
1756 }
1757
1758 void
1759 tsetscroll(int t, int b) {
1760 int temp;
1761
1762 LIMIT(t, 0, term.row-1);
1763 LIMIT(b, 0, term.row-1);
1764 if(t > b) {
1765 temp = t;
1766 t = b;
1767 b = temp;
1768 }
1769 term.top = t;
1770 term.bot = b;
1771 }
1772
1773 void
1774 tsetmode(bool priv, bool set, int *args, int narg) {
1775 int *lim, mode;
1776 bool alt;
1777
1778 for(lim = args + narg; args < lim; ++args) {
1779 if(priv) {
1780 switch(*args) {
1781 case 1: /* DECCKM -- Cursor key */
1782 MODBIT(term.mode, set, MODE_APPCURSOR);
1783 break;
1784 case 5: /* DECSCNM -- Reverse video */
1785 mode = term.mode;
1786 MODBIT(term.mode, set, MODE_REVERSE);
1787 if(mode != term.mode)
1788 redraw(REDRAW_TIMEOUT);
1789 break;
1790 case 6: /* DECOM -- Origin */
1791 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1792 tmoveato(0, 0);
1793 break;
1794 case 7: /* DECAWM -- Auto wrap */
1795 MODBIT(term.mode, set, MODE_WRAP);
1796 break;
1797 case 0: /* Error (IGNORED) */
1798 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1799 case 3: /* DECCOLM -- Column (IGNORED) */
1800 case 4: /* DECSCLM -- Scroll (IGNORED) */
1801 case 8: /* DECARM -- Auto repeat (IGNORED) */
1802 case 18: /* DECPFF -- Printer feed (IGNORED) */
1803 case 19: /* DECPEX -- Printer extent (IGNORED) */
1804 case 42: /* DECNRCM -- National characters (IGNORED) */
1805 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1806 break;
1807 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1808 MODBIT(term.mode, !set, MODE_HIDE);
1809 break;
1810 case 9: /* X10 mouse compatibility mode */
1811 xsetpointermotion(0);
1812 MODBIT(term.mode, 0, MODE_MOUSE);
1813 MODBIT(term.mode, set, MODE_MOUSEX10);
1814 break;
1815 case 1000: /* 1000: report button press */
1816 xsetpointermotion(0);
1817 MODBIT(term.mode, 0, MODE_MOUSE);
1818 MODBIT(term.mode, set, MODE_MOUSEBTN);
1819 break;
1820 case 1002: /* 1002: report motion on button press */
1821 xsetpointermotion(0);
1822 MODBIT(term.mode, 0, MODE_MOUSE);
1823 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1824 break;
1825 case 1003: /* 1003: enable all mouse motions */
1826 xsetpointermotion(set);
1827 MODBIT(term.mode, 0, MODE_MOUSE);
1828 MODBIT(term.mode, set, MODE_MOUSEMANY);
1829 break;
1830 case 1004: /* 1004: send focus events to tty */
1831 MODBIT(term.mode, set, MODE_FOCUS);
1832 break;
1833 case 1006: /* 1006: extended reporting mode */
1834 MODBIT(term.mode, set, MODE_MOUSESGR);
1835 break;
1836 case 1034:
1837 MODBIT(term.mode, set, MODE_8BIT);
1838 break;
1839 case 1049: /* swap screen & set/restore cursor as xterm */
1840 if (!allowaltscreen)
1841 break;
1842 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1843 /* FALLTHROUGH */
1844 case 47: /* swap screen */
1845 case 1047:
1846 if (!allowaltscreen)
1847 break;
1848 alt = IS_SET(MODE_ALTSCREEN);
1849 if(alt) {
1850 tclearregion(0, 0, term.col-1,
1851 term.row-1);
1852 }
1853 if(set ^ alt) /* set is always 1 or 0 */
1854 tswapscreen();
1855 if(*args != 1049)
1856 break;
1857 /* FALLTHROUGH */
1858 case 1048:
1859 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1860 break;
1861 case 2004: /* 2004: bracketed paste mode */
1862 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1863 break;
1864 /* Not implemented mouse modes. See comments there. */
1865 case 1001: /* mouse highlight mode; can hang the
1866 terminal by design when implemented. */
1867 case 1005: /* UTF-8 mouse mode; will confuse
1868 applications not supporting UTF-8
1869 and luit. */
1870 case 1015: /* urxvt mangled mouse mode; incompatible
1871 and can be mistaken for other control
1872 codes. */
1873 default:
1874 fprintf(stderr,
1875 "erresc: unknown private set/reset mode %d\n",
1876 *args);
1877 break;
1878 }
1879 } else {
1880 switch(*args) {
1881 case 0: /* Error (IGNORED) */
1882 break;
1883 case 2: /* KAM -- keyboard action */
1884 MODBIT(term.mode, set, MODE_KBDLOCK);
1885 break;
1886 case 4: /* IRM -- Insertion-replacement */
1887 MODBIT(term.mode, set, MODE_INSERT);
1888 break;
1889 case 12: /* SRM -- Send/Receive */
1890 MODBIT(term.mode, !set, MODE_ECHO);
1891 break;
1892 case 20: /* LNM -- Linefeed/new line */
1893 MODBIT(term.mode, set, MODE_CRLF);
1894 break;
1895 default:
1896 fprintf(stderr,
1897 "erresc: unknown set/reset mode %d\n",
1898 *args);
1899 break;
1900 }
1901 }
1902 }
1903 }
1904
1905 void
1906 csihandle(void) {
1907 char buf[40];
1908 int len;
1909
1910 switch(csiescseq.mode) {
1911 default:
1912 unknown:
1913 fprintf(stderr, "erresc: unknown csi ");
1914 csidump();
1915 /* die(""); */
1916 break;
1917 case '@': /* ICH -- Insert <n> blank char */
1918 DEFAULT(csiescseq.arg[0], 1);
1919 tinsertblank(csiescseq.arg[0]);
1920 break;
1921 case 'A': /* CUU -- Cursor <n> Up */
1922 DEFAULT(csiescseq.arg[0], 1);
1923 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1924 break;
1925 case 'B': /* CUD -- Cursor <n> Down */
1926 case 'e': /* VPR --Cursor <n> Down */
1927 DEFAULT(csiescseq.arg[0], 1);
1928 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1929 break;
1930 case 'i': /* MC -- Media Copy */
1931 switch(csiescseq.arg[0]) {
1932 case 0:
1933 tdump();
1934 break;
1935 case 1:
1936 tdumpline(term.c.y);
1937 break;
1938 case 2:
1939 tdumpsel();
1940 break;
1941 case 4:
1942 term.mode &= ~MODE_PRINT;
1943 break;
1944 case 5:
1945 term.mode |= MODE_PRINT;
1946 break;
1947 }
1948 break;
1949 case 'c': /* DA -- Device Attributes */
1950 if(csiescseq.arg[0] == 0)
1951 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1952 break;
1953 case 'C': /* CUF -- Cursor <n> Forward */
1954 case 'a': /* HPR -- Cursor <n> Forward */
1955 DEFAULT(csiescseq.arg[0], 1);
1956 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1957 break;
1958 case 'D': /* CUB -- Cursor <n> Backward */
1959 DEFAULT(csiescseq.arg[0], 1);
1960 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1961 break;
1962 case 'E': /* CNL -- Cursor <n> Down and first col */
1963 DEFAULT(csiescseq.arg[0], 1);
1964 tmoveto(0, term.c.y+csiescseq.arg[0]);
1965 break;
1966 case 'F': /* CPL -- Cursor <n> Up and first col */
1967 DEFAULT(csiescseq.arg[0], 1);
1968 tmoveto(0, term.c.y-csiescseq.arg[0]);
1969 break;
1970 case 'g': /* TBC -- Tabulation clear */
1971 switch(csiescseq.arg[0]) {
1972 case 0: /* clear current tab stop */
1973 term.tabs[term.c.x] = 0;
1974 break;
1975 case 3: /* clear all the tabs */
1976 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1977 break;
1978 default:
1979 goto unknown;
1980 }
1981 break;
1982 case 'G': /* CHA -- Move to <col> */
1983 case '`': /* HPA */
1984 DEFAULT(csiescseq.arg[0], 1);
1985 tmoveto(csiescseq.arg[0]-1, term.c.y);
1986 break;
1987 case 'H': /* CUP -- Move to <row> <col> */
1988 case 'f': /* HVP */
1989 DEFAULT(csiescseq.arg[0], 1);
1990 DEFAULT(csiescseq.arg[1], 1);
1991 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1992 break;
1993 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1994 DEFAULT(csiescseq.arg[0], 1);
1995 tputtab(csiescseq.arg[0]);
1996 break;
1997 case 'J': /* ED -- Clear screen */
1998 selclear(NULL);
1999 switch(csiescseq.arg[0]) {
2000 case 0: /* below */
2001 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2002 if(term.c.y < term.row-1) {
2003 tclearregion(0, term.c.y+1, term.col-1,
2004 term.row-1);
2005 }
2006 break;
2007 case 1: /* above */
2008 if(term.c.y > 1)
2009 tclearregion(0, 0, term.col-1, term.c.y-1);
2010 tclearregion(0, term.c.y, term.c.x, term.c.y);
2011 break;
2012 case 2: /* all */
2013 tclearregion(0, 0, term.col-1, term.row-1);
2014 break;
2015 default:
2016 goto unknown;
2017 }
2018 break;
2019 case 'K': /* EL -- Clear line */
2020 switch(csiescseq.arg[0]) {
2021 case 0: /* right */
2022 tclearregion(term.c.x, term.c.y, term.col-1,
2023 term.c.y);
2024 break;
2025 case 1: /* left */
2026 tclearregion(0, term.c.y, term.c.x, term.c.y);
2027 break;
2028 case 2: /* all */
2029 tclearregion(0, term.c.y, term.col-1, term.c.y);
2030 break;
2031 }
2032 break;
2033 case 'S': /* SU -- Scroll <n> line up */
2034 DEFAULT(csiescseq.arg[0], 1);
2035 tscrollup(term.top, csiescseq.arg[0]);
2036 break;
2037 case 'T': /* SD -- Scroll <n> line down */
2038 DEFAULT(csiescseq.arg[0], 1);
2039 tscrolldown(term.top, csiescseq.arg[0]);
2040 break;
2041 case 'L': /* IL -- Insert <n> blank lines */
2042 DEFAULT(csiescseq.arg[0], 1);
2043 tinsertblankline(csiescseq.arg[0]);
2044 break;
2045 case 'l': /* RM -- Reset Mode */
2046 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2047 break;
2048 case 'M': /* DL -- Delete <n> lines */
2049 DEFAULT(csiescseq.arg[0], 1);
2050 tdeleteline(csiescseq.arg[0]);
2051 break;
2052 case 'X': /* ECH -- Erase <n> char */
2053 DEFAULT(csiescseq.arg[0], 1);
2054 tclearregion(term.c.x, term.c.y,
2055 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2056 break;
2057 case 'P': /* DCH -- Delete <n> char */
2058 DEFAULT(csiescseq.arg[0], 1);
2059 tdeletechar(csiescseq.arg[0]);
2060 break;
2061 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2062 DEFAULT(csiescseq.arg[0], 1);
2063 tputtab(-csiescseq.arg[0]);
2064 break;
2065 case 'd': /* VPA -- Move to <row> */
2066 DEFAULT(csiescseq.arg[0], 1);
2067 tmoveato(term.c.x, csiescseq.arg[0]-1);
2068 break;
2069 case 'h': /* SM -- Set terminal mode */
2070 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2071 break;
2072 case 'm': /* SGR -- Terminal attribute (color) */
2073 tsetattr(csiescseq.arg, csiescseq.narg);
2074 break;
2075 case 'n': /* DSR – Device Status Report (cursor position) */
2076 if (csiescseq.arg[0] == 6) {
2077 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2078 term.c.y+1, term.c.x+1);
2079 ttywrite(buf, len);
2080 }
2081 break;
2082 case 'r': /* DECSTBM -- Set Scrolling Region */
2083 if(csiescseq.priv) {
2084 goto unknown;
2085 } else {
2086 DEFAULT(csiescseq.arg[0], 1);
2087 DEFAULT(csiescseq.arg[1], term.row);
2088 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2089 tmoveato(0, 0);
2090 }
2091 break;
2092 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2093 tcursor(CURSOR_SAVE);
2094 break;
2095 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2096 tcursor(CURSOR_LOAD);
2097 break;
2098 }
2099 }
2100
2101 void
2102 csidump(void) {
2103 int i;
2104 uint c;
2105
2106 printf("ESC[");
2107 for(i = 0; i < csiescseq.len; i++) {
2108 c = csiescseq.buf[i] & 0xff;
2109 if(isprint(c)) {
2110 putchar(c);
2111 } else if(c == '\n') {
2112 printf("(\\n)");
2113 } else if(c == '\r') {
2114 printf("(\\r)");
2115 } else if(c == 0x1b) {
2116 printf("(\\e)");
2117 } else {
2118 printf("(%02x)", c);
2119 }
2120 }
2121 putchar('\n');
2122 }
2123
2124 void
2125 csireset(void) {
2126 memset(&csiescseq, 0, sizeof(csiescseq));
2127 }
2128
2129 void
2130 strhandle(void) {
2131 char *p = NULL;
2132 int j, narg, par;
2133
2134 term.esc &= ~(ESC_STR_END|ESC_STR);
2135 strparse();
2136 narg = strescseq.narg;
2137 par = atoi(strescseq.args[0]);
2138
2139 switch(strescseq.type) {
2140 case ']': /* OSC -- Operating System Command */
2141 switch(par) {
2142 case 0:
2143 case 1:
2144 case 2:
2145 if(narg > 1)
2146 xsettitle(strescseq.args[1]);
2147 return;
2148 case 4: /* color set */
2149 if(narg < 3)
2150 break;
2151 p = strescseq.args[2];
2152 /* FALLTHROUGH */
2153 case 104: /* color reset, here p = NULL */
2154 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2155 if(xsetcolorname(j, p)) {
2156 fprintf(stderr, "erresc: invalid color %s\n", p);
2157 } else {
2158 /*
2159 * TODO if defaultbg color is changed, borders
2160 * are dirty
2161 */
2162 redraw(0);
2163 }
2164 return;
2165 }
2166 break;
2167 case 'k': /* old title set compatibility */
2168 xsettitle(strescseq.args[0]);
2169 return;
2170 case 'P': /* DCS -- Device Control String */
2171 case '_': /* APC -- Application Program Command */
2172 case '^': /* PM -- Privacy Message */
2173 return;
2174 }
2175
2176 fprintf(stderr, "erresc: unknown str ");
2177 strdump();
2178 }
2179
2180 void
2181 strparse(void) {
2182 char *p = strescseq.buf;
2183
2184 strescseq.narg = 0;
2185 strescseq.buf[strescseq.len] = '\0';
2186 while(p && strescseq.narg < STR_ARG_SIZ)
2187 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2188 }
2189
2190 void
2191 strdump(void) {
2192 int i;
2193 uint c;
2194
2195 printf("ESC%c", strescseq.type);
2196 for(i = 0; i < strescseq.len; i++) {
2197 c = strescseq.buf[i] & 0xff;
2198 if(c == '\0') {
2199 return;
2200 } else if(isprint(c)) {
2201 putchar(c);
2202 } else if(c == '\n') {
2203 printf("(\\n)");
2204 } else if(c == '\r') {
2205 printf("(\\r)");
2206 } else if(c == 0x1b) {
2207 printf("(\\e)");
2208 } else {
2209 printf("(%02x)", c);
2210 }
2211 }
2212 printf("ESC\\\n");
2213 }
2214
2215 void
2216 strreset(void) {
2217 memset(&strescseq, 0, sizeof(strescseq));
2218 }
2219
2220 void
2221 tprinter(char *s, size_t len) {
2222 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2223 fprintf(stderr, "Error writing in %s:%s\n",
2224 opt_io, strerror(errno));
2225 close(iofd);
2226 iofd = -1;
2227 }
2228 }
2229
2230 void
2231 toggleprinter(const Arg *arg) {
2232 term.mode ^= MODE_PRINT;
2233 }
2234
2235 void
2236 printscreen(const Arg *arg) {
2237 tdump();
2238 }
2239
2240 void
2241 printsel(const Arg *arg) {
2242 tdumpsel();
2243 }
2244
2245 void
2246 tdumpsel(void) {
2247 char *ptr;
2248
2249 if((ptr = getsel())) {
2250 tprinter(ptr, strlen(ptr));
2251 free(ptr);
2252 }
2253 }
2254
2255 void
2256 tdumpline(int n) {
2257 Glyph *bp, *end;
2258
2259 bp = &term.line[n][0];
2260 end = &bp[term.col-1];
2261 while(end > bp && !strcmp(" ", end->c))
2262 --end;
2263 if(bp != end || strcmp(bp->c, " ")) {
2264 for( ;bp <= end; ++bp)
2265 tprinter(bp->c, strlen(bp->c));
2266 }
2267 tprinter("\n", 1);
2268 }
2269
2270 void
2271 tdump(void) {
2272 int i;
2273
2274 for(i = 0; i < term.row; ++i)
2275 tdumpline(i);
2276 }
2277
2278 void
2279 tputtab(int n) {
2280 uint x = term.c.x;
2281
2282 if(n > 0) {
2283 while(x < term.col && n--)
2284 for(++x; x < term.col && !term.tabs[x]; ++x)
2285 /* nothing */ ;
2286 } else if(n < 0) {
2287 while(x > 0 && n++)
2288 for(--x; x > 0 && !term.tabs[x]; --x)
2289 /* nothing */ ;
2290 }
2291 tmoveto(x, term.c.y);
2292 }
2293
2294 void
2295 techo(char *buf, int len) {
2296 for(; len > 0; buf++, len--) {
2297 char c = *buf;
2298
2299 if(ISCONTROL(c)) { /* control code */
2300 if(c & 0x80) {
2301 c &= 0x7f;
2302 tputc("^", 1);
2303 tputc("[", 1);
2304 } else if(c != '\n' && c != '\r' && c != '\t') {
2305 c ^= '\x40';
2306 tputc("^", 1);
2307 }
2308 tputc(&c, 1);
2309 } else {
2310 break;
2311 }
2312 }
2313 if(len)
2314 tputc(buf, len);
2315 }
2316
2317 void
2318 tdeftran(char ascii) {
2319 char c, (*bp)[2];
2320 static char tbl[][2] = {
2321 {'0', CS_GRAPHIC0}, {'B', CS_USA},
2322 {0, 0}
2323 };
2324
2325 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2326 /* nothing */;
2327
2328 if (c == 0)
2329 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2330 else
2331 term.trantbl[term.icharset] = (*bp)[1];
2332 }
2333
2334 void
2335 tcontrolcode(uchar ascii) {
2336 static char question[UTF_SIZ] = "?";
2337
2338 switch(ascii) {
2339 case '\t': /* HT */
2340 tputtab(1);
2341 return;
2342 case '\b': /* BS */
2343 tmoveto(term.c.x-1, term.c.y);
2344 return;
2345 case '\r': /* CR */
2346 tmoveto(0, term.c.y);
2347 return;
2348 case '\f': /* LF */
2349 case '\v': /* VT */
2350 case '\n': /* LF */
2351 /* go to first col if the mode is set */
2352 tnewline(IS_SET(MODE_CRLF));
2353 return;
2354 case '\a': /* BEL */
2355 if(term.esc & ESC_STR_END) {
2356 /* backwards compatibility to xterm */
2357 strhandle();
2358 } else {
2359 if(!(xw.state & WIN_FOCUSED))
2360 xseturgency(1);
2361 if (bellvolume)
2362 XBell(xw.dpy, bellvolume);
2363 }
2364 break;
2365 case '\033': /* ESC */
2366 csireset();
2367 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2368 term.esc |= ESC_START;
2369 return;
2370 case '\016': /* SO */
2371 term.charset = 0;
2372 return;
2373 case '\017': /* SI */
2374 term.charset = 1;
2375 return;
2376 case '\032': /* SUB */
2377 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2378 case '\030': /* CAN */
2379 csireset();
2380 break;
2381 case '\005': /* ENQ (IGNORED) */
2382 case '\000': /* NUL (IGNORED) */
2383 case '\021': /* XON (IGNORED) */
2384 case '\023': /* XOFF (IGNORED) */
2385 case 0177: /* DEL (IGNORED) */
2386 return;
2387 case 0x84: /* TODO: IND */
2388 case 0x85: /* TODO: NEL */
2389 case 0x88: /* TODO: HTS */
2390 case 0x8d: /* TODO: RI */
2391 case 0x8e: /* TODO: SS2 */
2392 case 0x8f: /* TODO: SS3 */
2393 case 0x90: /* TODO: DCS */
2394 case 0x98: /* TODO: SOS */
2395 case 0x9a: /* TODO: DECID */
2396 case 0x9b: /* TODO: CSI */
2397 case 0x9c: /* TODO: ST */
2398 case 0x9d: /* TODO: OSC */
2399 case 0x9e: /* TODO: PM */
2400 case 0x9f: /* TODO: APC */
2401 break;
2402 }
2403 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2404 term.esc &= ~(ESC_STR_END|ESC_STR);
2405 return;
2406 }
2407
2408 void
2409 tdectest(char c) {
2410 static char E[UTF_SIZ] = "E";
2411 int x, y;
2412
2413 if(c == '8') { /* DEC screen alignment test. */
2414 for(x = 0; x < term.col; ++x) {
2415 for(y = 0; y < term.row; ++y)
2416 tsetchar(E, &term.c.attr, x, y);
2417 }
2418 }
2419 }
2420
2421 void
2422 tputc(char *c, int len) {
2423 uchar ascii;
2424 bool control;
2425 long unicodep;
2426 int width;
2427 Glyph *gp;
2428
2429 if(len == 1) {
2430 width = 1;
2431 unicodep = ascii = *c;
2432 } else {
2433 utf8decode(c, &unicodep, UTF_SIZ);
2434 width = wcwidth(unicodep);
2435 control = ISCONTROLC1(unicodep);
2436 ascii = unicodep;
2437 }
2438
2439 if(IS_SET(MODE_PRINT))
2440 tprinter(c, len);
2441 control = ISCONTROL(unicodep);
2442
2443 /*
2444 * STR sequence must be checked before anything else
2445 * because it uses all following characters until it
2446 * receives a ESC, a SUB, a ST or any other C1 control
2447 * character.
2448 */
2449 if(term.esc & ESC_STR) {
2450 if(width == 1 &&
2451 (ascii == '\a' || ascii == 030 ||
2452 ascii == 032 || ascii == 033 ||
2453 ISCONTROLC1(unicodep))) {
2454 term.esc &= ~(ESC_START|ESC_STR);
2455 term.esc |= ESC_STR_END;
2456 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2457 memmove(&strescseq.buf[strescseq.len], c, len);
2458 strescseq.len += len;
2459 return;
2460 } else {
2461 /*
2462 * Here is a bug in terminals. If the user never sends
2463 * some code to stop the str or esc command, then st
2464 * will stop responding. But this is better than
2465 * silently failing with unknown characters. At least
2466 * then users will report back.
2467 *
2468 * In the case users ever get fixed, here is the code:
2469 */
2470 /*
2471 * term.esc = 0;
2472 * strhandle();
2473 */
2474 return;
2475 }
2476 }
2477
2478 /*
2479 * Actions of control codes must be performed as soon they arrive
2480 * because they can be embedded inside a control sequence, and
2481 * they must not cause conflicts with sequences.
2482 */
2483 if(control) {
2484 tcontrolcode(ascii);
2485 /*
2486 * control codes are not shown ever
2487 */
2488 return;
2489 } else if(term.esc & ESC_START) {
2490 if(term.esc & ESC_CSI) {
2491 csiescseq.buf[csiescseq.len++] = ascii;
2492 if(BETWEEN(ascii, 0x40, 0x7E)
2493 || csiescseq.len >= \
2494 sizeof(csiescseq.buf)-1) {
2495 term.esc = 0;
2496 csiparse();
2497 csihandle();
2498 }
2499 return;
2500 } else if(term.esc & ESC_ALTCHARSET) {
2501 tdeftran(ascii);
2502 } else if(term.esc & ESC_TEST) {
2503 tdectest(ascii);
2504 } else {
2505 switch(ascii) {
2506 case '[':
2507 term.esc |= ESC_CSI;
2508 return;
2509 case '#':
2510 term.esc |= ESC_TEST;
2511 return;
2512 case 'P': /* DCS -- Device Control String */
2513 case '_': /* APC -- Application Program Command */
2514 case '^': /* PM -- Privacy Message */
2515 case ']': /* OSC -- Operating System Command */
2516 case 'k': /* old title set compatibility */
2517 strreset();
2518 strescseq.type = ascii;
2519 term.esc |= ESC_STR;
2520 return;
2521 case '(': /* set primary charset G0 */
2522 case ')': /* set secondary charset G1 */
2523 case '*': /* set tertiary charset G2 */
2524 case '+': /* set quaternary charset G3 */
2525 term.icharset = ascii - '(';
2526 term.esc |= ESC_ALTCHARSET;
2527 return;
2528 case 'D': /* IND -- Linefeed */
2529 if(term.c.y == term.bot) {
2530 tscrollup(term.top, 1);
2531 } else {
2532 tmoveto(term.c.x, term.c.y+1);
2533 }
2534 break;
2535 case 'E': /* NEL -- Next line */
2536 tnewline(1); /* always go to first col */
2537 break;
2538 case 'H': /* HTS -- Horizontal tab stop */
2539 term.tabs[term.c.x] = 1;
2540 break;
2541 case 'M': /* RI -- Reverse index */
2542 if(term.c.y == term.top) {
2543 tscrolldown(term.top, 1);
2544 } else {
2545 tmoveto(term.c.x, term.c.y-1);
2546 }
2547 break;
2548 case 'Z': /* DECID -- Identify Terminal */
2549 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2550 break;
2551 case 'c': /* RIS -- Reset to inital state */
2552 treset();
2553 xresettitle();
2554 xloadcols();
2555 break;
2556 case '=': /* DECPAM -- Application keypad */
2557 term.mode |= MODE_APPKEYPAD;
2558 break;
2559 case '>': /* DECPNM -- Normal keypad */
2560 term.mode &= ~MODE_APPKEYPAD;
2561 break;
2562 case '7': /* DECSC -- Save Cursor */
2563 tcursor(CURSOR_SAVE);
2564 break;
2565 case '8': /* DECRC -- Restore Cursor */
2566 tcursor(CURSOR_LOAD);
2567 break;
2568 case '\\': /* ST -- String Terminator */
2569 if(term.esc & ESC_STR_END)
2570 strhandle();
2571 break;
2572 default:
2573 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2574 (uchar) ascii, isprint(ascii)? ascii:'.');
2575 break;
2576 }
2577 }
2578 term.esc = 0;
2579 /*
2580 * All characters which form part of a sequence are not
2581 * printed
2582 */
2583 return;
2584 }
2585 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2586 selclear(NULL);
2587
2588 gp = &term.line[term.c.y][term.c.x];
2589 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2590 gp->mode |= ATTR_WRAP;
2591 tnewline(1);
2592 }
2593
2594 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2595 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2596
2597 if(term.c.x+width > term.col)
2598 tnewline(1);
2599
2600 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2601
2602 if(width == 2) {
2603 gp->mode |= ATTR_WIDE;
2604 if(term.c.x+1 < term.col) {
2605 gp[1].c[0] = '\0';
2606 gp[1].mode = ATTR_WDUMMY;
2607 }
2608 }
2609 if(term.c.x+width < term.col) {
2610 tmoveto(term.c.x+width, term.c.y);
2611 } else {
2612 term.c.state |= CURSOR_WRAPNEXT;
2613 }
2614 }
2615
2616 int
2617 tresize(int col, int row) {
2618 int i;
2619 int minrow = MIN(row, term.row);
2620 int mincol = MIN(col, term.col);
2621 int slide = term.c.y - row + 1;
2622 bool *bp;
2623 Line *orig;
2624 TCursor c;
2625
2626 if(col < 1 || row < 1)
2627 return 0;
2628
2629 /* free unneeded rows */
2630 i = 0;
2631 if(slide > 0) {
2632 /*
2633 * slide screen to keep cursor where we expect it -
2634 * tscrollup would work here, but we can optimize to
2635 * memmove because we're freeing the earlier lines
2636 */
2637 for(/* i = 0 */; i < slide; i++) {
2638 free(term.line[i]);
2639 free(term.alt[i]);
2640 }
2641 memmove(term.line, term.line + slide, row * sizeof(Line));
2642 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2643 }
2644 for(i += row; i < term.row; i++) {
2645 free(term.line[i]);
2646 free(term.alt[i]);
2647 }
2648
2649 /* resize to new height */
2650 term.line = xrealloc(term.line, row * sizeof(Line));
2651 term.alt = xrealloc(term.alt, row * sizeof(Line));
2652 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2653 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2654
2655 /* resize each row to new width, zero-pad if needed */
2656 for(i = 0; i < minrow; i++) {
2657 term.dirty[i] = 1;
2658 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2659 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2660 }
2661
2662 /* allocate any new rows */
2663 for(/* i == minrow */; i < row; i++) {
2664 term.dirty[i] = 1;
2665 term.line[i] = xmalloc(col * sizeof(Glyph));
2666 term.alt[i] = xmalloc(col * sizeof(Glyph));
2667 }
2668 if(col > term.col) {
2669 bp = term.tabs + term.col;
2670
2671 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2672 while(--bp > term.tabs && !*bp)
2673 /* nothing */ ;
2674 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2675 *bp = 1;
2676 }
2677 /* update terminal size */
2678 term.col = col;
2679 term.row = row;
2680 /* reset scrolling region */
2681 tsetscroll(0, row-1);
2682 /* make use of the LIMIT in tmoveto */
2683 tmoveto(term.c.x, term.c.y);
2684 /* Clearing both screens */
2685 orig = term.line;
2686 c = term.c;
2687 do {
2688 if(mincol < col && 0 < minrow) {
2689 tclearregion(mincol, 0, col - 1, minrow - 1);
2690 }
2691 if(0 < col && minrow < row) {
2692 tclearregion(0, minrow, col - 1, row - 1);
2693 }
2694 tswapscreen();
2695 tcursor(CURSOR_LOAD);
2696 } while(orig != term.line);
2697 term.c = c;
2698
2699 return (slide > 0);
2700 }
2701
2702 void
2703 xresize(int col, int row) {
2704 xw.tw = MAX(1, col * xw.cw);
2705 xw.th = MAX(1, row * xw.ch);
2706
2707 XFreePixmap(xw.dpy, xw.buf);
2708 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2709 DefaultDepth(xw.dpy, xw.scr));
2710 XftDrawChange(xw.draw, xw.buf);
2711 xclear(0, 0, xw.w, xw.h);
2712 }
2713
2714 static inline ushort
2715 sixd_to_16bit(int x) {
2716 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2717 }
2718
2719 void
2720 xloadcols(void) {
2721 int i;
2722 XRenderColor color = { .alpha = 0xffff };
2723 static bool loaded;
2724 Color *cp;
2725
2726 if(loaded) {
2727 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2728 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2729 }
2730
2731 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2732 for(i = 0; i < LEN(colorname); i++) {
2733 if(!colorname[i])
2734 continue;
2735 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2736 die("Could not allocate color '%s'\n", colorname[i]);
2737 }
2738 }
2739
2740 /* load colors [16-231] ; same colors as xterm */
2741 for(i = 16; i < 6*6*6+16; i++) {
2742 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2743 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2744 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2745 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2746 die("Could not allocate color %d\n", i);
2747 }
2748
2749 /* load colors [232-255] ; grayscale */
2750 for(; i < 256; i++) {
2751 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2752 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2753 die("Could not allocate color %d\n", i);
2754 }
2755 loaded = true;
2756 }
2757
2758 int
2759 xsetcolorname(int x, const char *name) {
2760 XRenderColor color = { .alpha = 0xffff };
2761 Color ncolor;
2762
2763 if(!BETWEEN(x, 0, LEN(colorname)))
2764 return 1;
2765
2766 if(!name) {
2767 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2768 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2769 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2770 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2771 if(!XftColorAllocValue(xw.dpy, xw.vis,
2772 xw.cmap, &color, &ncolor)) {
2773 return 1;
2774 }
2775
2776 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2777 dc.col[x] = ncolor;
2778 return 0;
2779 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2780 color.red = color.green = color.blue = \
2781 0x0808 + 0x0a0a * (x - (16 + 216));
2782 if(!XftColorAllocValue(xw.dpy, xw.vis,
2783 xw.cmap, &color, &ncolor)) {
2784 return 1;
2785 }
2786
2787 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2788 dc.col[x] = ncolor;
2789 return 0;
2790 } else { /* system colors */
2791 name = colorname[x];
2792 }
2793 }
2794 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2795 return 1;
2796
2797 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2798 dc.col[x] = ncolor;
2799 return 0;
2800 }
2801
2802 void
2803 xtermclear(int col1, int row1, int col2, int row2) {
2804 XftDrawRect(xw.draw,
2805 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2806 borderpx + col1 * xw.cw,
2807 borderpx + row1 * xw.ch,
2808 (col2-col1+1) * xw.cw,
2809 (row2-row1+1) * xw.ch);
2810 }
2811
2812 /*
2813 * Absolute coordinates.
2814 */
2815 void
2816 xclear(int x1, int y1, int x2, int y2) {
2817 XftDrawRect(xw.draw,
2818 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2819 x1, y1, x2-x1, y2-y1);
2820 }
2821
2822 void
2823 xhints(void) {
2824 XClassHint class = {opt_class ? opt_class : termname, termname};
2825 XWMHints wm = {.flags = InputHint, .input = 1};
2826 XSizeHints *sizeh = NULL;
2827
2828 sizeh = XAllocSizeHints();
2829
2830 sizeh->flags = PSize | PResizeInc | PBaseSize;
2831 sizeh->height = xw.h;
2832 sizeh->width = xw.w;
2833 sizeh->height_inc = xw.ch;
2834 sizeh->width_inc = xw.cw;
2835 sizeh->base_height = 2 * borderpx;
2836 sizeh->base_width = 2 * borderpx;
2837 if(xw.isfixed == True) {
2838 sizeh->flags |= PMaxSize | PMinSize;
2839 sizeh->min_width = sizeh->max_width = xw.w;
2840 sizeh->min_height = sizeh->max_height = xw.h;
2841 }
2842 if(xw.gm & (XValue|YValue)) {
2843 sizeh->flags |= USPosition | PWinGravity;
2844 sizeh->x = xw.l;
2845 sizeh->y = xw.t;
2846 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2847 }
2848
2849 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2850 &class);
2851 XFree(sizeh);
2852 }
2853
2854 int
2855 xgeommasktogravity(int mask) {
2856 switch(mask & (XNegative|YNegative)) {
2857 case 0:
2858 return NorthWestGravity;
2859 case XNegative:
2860 return NorthEastGravity;
2861 case YNegative:
2862 return SouthWestGravity;
2863 }
2864 return SouthEastGravity;
2865 }
2866
2867 int
2868 xloadfont(Font *f, FcPattern *pattern) {
2869 FcPattern *match;
2870 FcResult result;
2871
2872 match = FcFontMatch(NULL, pattern, &result);
2873 if(!match)
2874 return 1;
2875
2876 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2877 FcPatternDestroy(match);
2878 return 1;
2879 }
2880
2881 f->set = NULL;
2882 f->pattern = FcPatternDuplicate(pattern);
2883
2884 f->ascent = f->match->ascent;
2885 f->descent = f->match->descent;
2886 f->lbearing = 0;
2887 f->rbearing = f->match->max_advance_width;
2888
2889 f->height = f->ascent + f->descent;
2890 f->width = f->lbearing + f->rbearing;
2891
2892 return 0;
2893 }
2894
2895 void
2896 xloadfonts(char *fontstr, double fontsize) {
2897 FcPattern *pattern;
2898 FcResult r_sz, r_psz;
2899 double fontval;
2900
2901 if(fontstr[0] == '-') {
2902 pattern = XftXlfdParse(fontstr, False, False);
2903 } else {
2904 pattern = FcNameParse((FcChar8 *)fontstr);
2905 }
2906
2907 if(!pattern)
2908 die("st: can't open font %s\n", fontstr);
2909
2910 if(fontsize > 0) {
2911 FcPatternDel(pattern, FC_PIXEL_SIZE);
2912 FcPatternDel(pattern, FC_SIZE);
2913 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2914 usedfontsize = fontsize;
2915 } else {
2916 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2917 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2918 if(r_psz == FcResultMatch) {
2919 usedfontsize = fontval;
2920 } else if(r_sz == FcResultMatch) {
2921 usedfontsize = -1;
2922 } else {
2923 /*
2924 * Default font size is 12, if none given. This is to
2925 * have a known usedfontsize value.
2926 */
2927 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2928 usedfontsize = 12;
2929 }
2930 }
2931
2932 FcConfigSubstitute(0, pattern, FcMatchPattern);
2933 FcDefaultSubstitute(pattern);
2934
2935 if(xloadfont(&dc.font, pattern))
2936 die("st: can't open font %s\n", fontstr);
2937
2938 if(usedfontsize < 0) {
2939 FcPatternGetDouble(dc.font.match->pattern,
2940 FC_PIXEL_SIZE, 0, &fontval);
2941 usedfontsize = fontval;
2942 }
2943
2944 /* Setting character width and height. */
2945 xw.cw = CEIL(dc.font.width * cwscale);
2946 xw.ch = CEIL(dc.font.height * chscale);
2947
2948 FcPatternDel(pattern, FC_SLANT);
2949 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2950 if(xloadfont(&dc.ifont, pattern))
2951 die("st: can't open font %s\n", fontstr);
2952
2953 FcPatternDel(pattern, FC_WEIGHT);
2954 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2955 if(xloadfont(&dc.ibfont, pattern))
2956 die("st: can't open font %s\n", fontstr);
2957
2958 FcPatternDel(pattern, FC_SLANT);
2959 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2960 if(xloadfont(&dc.bfont, pattern))
2961 die("st: can't open font %s\n", fontstr);
2962
2963 FcPatternDestroy(pattern);
2964 }
2965
2966 int
2967 xloadfontset(Font *f) {
2968 FcResult result;
2969
2970 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2971 return 1;
2972 return 0;
2973 }
2974
2975 void
2976 xunloadfont(Font *f) {
2977 XftFontClose(xw.dpy, f->match);
2978 FcPatternDestroy(f->pattern);
2979 if(f->set)
2980 FcFontSetDestroy(f->set);
2981 }
2982
2983 void
2984 xunloadfonts(void) {
2985 /* Free the loaded fonts in the font cache. */
2986 while(frclen > 0)
2987 XftFontClose(xw.dpy, frc[--frclen].font);
2988
2989 xunloadfont(&dc.font);
2990 xunloadfont(&dc.bfont);
2991 xunloadfont(&dc.ifont);
2992 xunloadfont(&dc.ibfont);
2993 }
2994
2995 void
2996 xzoom(const Arg *arg) {
2997 xunloadfonts();
2998 xloadfonts(usedfont, usedfontsize + arg->i);
2999 cresize(0, 0);
3000 redraw(0);
3001 }
3002
3003 void
3004 xinit(void) {
3005 XGCValues gcvalues;
3006 Cursor cursor;
3007 Window parent;
3008 pid_t thispid = getpid();
3009
3010 if(!(xw.dpy = XOpenDisplay(NULL)))
3011 die("Can't open display\n");
3012 xw.scr = XDefaultScreen(xw.dpy);
3013 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3014
3015 /* font */
3016 if(!FcInit())
3017 die("Could not init fontconfig.\n");
3018
3019 usedfont = (opt_font == NULL)? font : opt_font;
3020 xloadfonts(usedfont, 0);
3021
3022 /* colors */
3023 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3024 xloadcols();
3025
3026 /* adjust fixed window geometry */
3027 xw.w = 2 * borderpx + term.col * xw.cw;
3028 xw.h = 2 * borderpx + term.row * xw.ch;
3029 if(xw.gm & XNegative)
3030 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3031 if(xw.gm & YNegative)
3032 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3033
3034 /* Events */
3035 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3036 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3037 xw.attrs.bit_gravity = NorthWestGravity;
3038 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3039 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3040 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3041 xw.attrs.colormap = xw.cmap;
3042
3043 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3044 XRootWindow(xw.dpy, xw.scr);
3045 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3046 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3047 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3048 | CWEventMask | CWColormap, &xw.attrs);
3049
3050 memset(&gcvalues, 0, sizeof(gcvalues));
3051 gcvalues.graphics_exposures = False;
3052 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3053 &gcvalues);
3054 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3055 DefaultDepth(xw.dpy, xw.scr));
3056 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3057 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3058
3059 /* Xft rendering context */
3060 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3061
3062 /* input methods */
3063 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3064 XSetLocaleModifiers("@im=local");
3065 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3066 XSetLocaleModifiers("@im=");
3067 if((xw.xim = XOpenIM(xw.dpy,
3068 NULL, NULL, NULL)) == NULL) {
3069 die("XOpenIM failed. Could not open input"
3070 " device.\n");
3071 }
3072 }
3073 }
3074 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3075 | XIMStatusNothing, XNClientWindow, xw.win,
3076 XNFocusWindow, xw.win, NULL);
3077 if(xw.xic == NULL)
3078 die("XCreateIC failed. Could not obtain input method.\n");
3079
3080 /* white cursor, black outline */
3081 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3082 XDefineCursor(xw.dpy, xw.win, cursor);
3083 XRecolorCursor(xw.dpy, cursor,
3084 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3085 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3086
3087 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3088 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3089 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3090 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3091
3092 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3093 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3094 PropModeReplace, (uchar *)&thispid, 1);
3095
3096 xresettitle();
3097 XMapWindow(xw.dpy, xw.win);
3098 xhints();
3099 XSync(xw.dpy, False);
3100 }
3101
3102 void
3103 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3104 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3105 width = charlen * xw.cw, xp, i;
3106 int frcflags;
3107 int u8fl, u8fblen, u8cblen, doesexist;
3108 char *u8c, *u8fs;
3109 long unicodep;
3110 Font *font = &dc.font;
3111 FcResult fcres;
3112 FcPattern *fcpattern, *fontpattern;
3113 FcFontSet *fcsets[] = { NULL };
3114 FcCharSet *fccharset;
3115 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3116 XRenderColor colfg, colbg;
3117 XRectangle r;
3118 int oneatatime;
3119
3120 frcflags = FRC_NORMAL;
3121
3122 if(base.mode & ATTR_ITALIC) {
3123 if(base.fg == defaultfg)
3124 base.fg = defaultitalic;
3125 font = &dc.ifont;
3126 frcflags = FRC_ITALIC;
3127 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3128 if(base.fg == defaultfg)
3129 base.fg = defaultitalic;
3130 font = &dc.ibfont;
3131 frcflags = FRC_ITALICBOLD;
3132 } else if(base.mode & ATTR_UNDERLINE) {
3133 if(base.fg == defaultfg)
3134 base.fg = defaultunderline;
3135 }
3136
3137 if(IS_TRUECOL(base.fg)) {
3138 colfg.alpha = 0xffff;
3139 colfg.red = TRUERED(base.fg);
3140 colfg.green = TRUEGREEN(base.fg);
3141 colfg.blue = TRUEBLUE(base.fg);
3142 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3143 fg = &truefg;
3144 } else {
3145 fg = &dc.col[base.fg];
3146 }
3147
3148 if(IS_TRUECOL(base.bg)) {
3149 colbg.alpha = 0xffff;
3150 colbg.green = TRUEGREEN(base.bg);
3151 colbg.red = TRUERED(base.bg);
3152 colbg.blue = TRUEBLUE(base.bg);
3153 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3154 bg = &truebg;
3155 } else {
3156 bg = &dc.col[base.bg];
3157 }
3158
3159 if(base.mode & ATTR_BOLD) {
3160 /*
3161 * change basic system colors [0-7]
3162 * to bright system colors [8-15]
3163 */
3164 if(BETWEEN(base.fg, 0, 7))
3165 fg = &dc.col[base.fg + 8];
3166
3167 if(base.mode & ATTR_ITALIC) {
3168 font = &dc.ibfont;
3169 frcflags = FRC_ITALICBOLD;
3170 } else {
3171 font = &dc.bfont;
3172 frcflags = FRC_BOLD;
3173 }
3174 }
3175
3176 if(IS_SET(MODE_REVERSE)) {
3177 if(fg == &dc.col[defaultfg]) {
3178 fg = &dc.col[defaultbg];
3179 } else {
3180 colfg.red = ~fg->color.red;
3181 colfg.green = ~fg->color.green;
3182 colfg.blue = ~fg->color.blue;
3183 colfg.alpha = fg->color.alpha;
3184 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3185 &revfg);
3186 fg = &revfg;
3187 }
3188
3189 if(bg == &dc.col[defaultbg]) {
3190 bg = &dc.col[defaultfg];
3191 } else {
3192 colbg.red = ~bg->color.red;
3193 colbg.green = ~bg->color.green;
3194 colbg.blue = ~bg->color.blue;
3195 colbg.alpha = bg->color.alpha;
3196 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3197 &revbg);
3198 bg = &revbg;
3199 }
3200 }
3201
3202 if(base.mode & ATTR_REVERSE) {
3203 temp = fg;
3204 fg = bg;
3205 bg = temp;
3206 }
3207
3208 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3209 fg = bg;
3210
3211 /* Intelligent cleaning up of the borders. */
3212 if(x == 0) {
3213 xclear(0, (y == 0)? 0 : winy, borderpx,
3214 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3215 }
3216 if(x + charlen >= term.col) {
3217 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3218 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3219 }
3220 if(y == 0)
3221 xclear(winx, 0, winx + width, borderpx);
3222 if(y == term.row-1)
3223 xclear(winx, winy + xw.ch, winx + width, xw.h);
3224
3225 /* Clean up the region we want to draw to. */
3226 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3227
3228 /* Set the clip region because Xft is sometimes dirty. */
3229 r.x = 0;
3230 r.y = 0;
3231 r.height = xw.ch;
3232 r.width = width;
3233 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3234
3235 for(xp = winx; bytelen > 0;) {
3236 /*
3237 * Search for the range in the to be printed string of glyphs
3238 * that are in the main font. Then print that range. If
3239 * some glyph is found that is not in the font, do the
3240 * fallback dance.
3241 */
3242 u8fs = s;
3243 u8fblen = 0;
3244 u8fl = 0;
3245 oneatatime = font->width != xw.cw;
3246 for(;;) {
3247 u8c = s;
3248 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3249 s += u8cblen;
3250 bytelen -= u8cblen;
3251
3252 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3253 if(oneatatime || !doesexist || bytelen <= 0) {
3254 if(oneatatime || bytelen <= 0) {
3255 if(doesexist) {
3256 u8fl++;
3257 u8fblen += u8cblen;
3258 }
3259 }
3260
3261 if(u8fl > 0) {
3262 XftDrawStringUtf8(xw.draw, fg,
3263 font->match, xp,
3264 winy + font->ascent,
3265 (FcChar8 *)u8fs,
3266 u8fblen);
3267 xp += xw.cw * u8fl;
3268
3269 }
3270 break;
3271 }
3272
3273 u8fl++;
3274 u8fblen += u8cblen;
3275 }
3276 if(doesexist) {
3277 if(oneatatime)
3278 continue;
3279 break;
3280 }
3281
3282 /* Search the font cache. */
3283 for(i = 0; i < frclen; i++) {
3284 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3285 && frc[i].flags == frcflags) {
3286 break;
3287 }
3288 }
3289
3290 /* Nothing was found. */
3291 if(i >= frclen) {
3292 if(!font->set)
3293 xloadfontset(font);
3294 fcsets[0] = font->set;
3295
3296 /*
3297 * Nothing was found in the cache. Now use
3298 * some dozen of Fontconfig calls to get the
3299 * font for one single character.
3300 *
3301 * Xft and fontconfig are design failures.
3302 */
3303 fcpattern = FcPatternDuplicate(font->pattern);
3304 fccharset = FcCharSetCreate();
3305
3306 FcCharSetAddChar(fccharset, unicodep);
3307 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3308 fccharset);
3309 FcPatternAddBool(fcpattern, FC_SCALABLE,
3310 FcTrue);
3311
3312 FcConfigSubstitute(0, fcpattern,
3313 FcMatchPattern);
3314 FcDefaultSubstitute(fcpattern);
3315
3316 fontpattern = FcFontSetMatch(0, fcsets,
3317 FcTrue, fcpattern, &fcres);
3318
3319 /*
3320 * Overwrite or create the new cache entry.
3321 */
3322 if(frclen >= LEN(frc)) {
3323 frclen = LEN(frc) - 1;
3324 XftFontClose(xw.dpy, frc[frclen].font);
3325 }
3326
3327 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3328 fontpattern);
3329 frc[frclen].flags = frcflags;
3330
3331 i = frclen;
3332 frclen++;
3333
3334 FcPatternDestroy(fcpattern);
3335 FcCharSetDestroy(fccharset);
3336 }
3337
3338 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3339 xp, winy + frc[i].font->ascent,
3340 (FcChar8 *)u8c, u8cblen);
3341
3342 xp += xw.cw * wcwidth(unicodep);
3343 }
3344
3345 /*
3346 * This is how the loop above actually should be. Why does the
3347 * application have to care about font details?
3348 *
3349 * I have to repeat: Xft and Fontconfig are design failures.
3350 */
3351 /*
3352 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3353 winy + font->ascent, (FcChar8 *)s, bytelen);
3354 */
3355
3356 if(base.mode & ATTR_UNDERLINE) {
3357 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3358 width, 1);
3359 }
3360
3361 /* Reset clip to none. */
3362 XftDrawSetClip(xw.draw, 0);
3363 }
3364
3365 void
3366 xdrawcursor(void) {
3367 static int oldx = 0, oldy = 0;
3368 int sl, width, curx;
3369 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3370
3371 LIMIT(oldx, 0, term.col-1);
3372 LIMIT(oldy, 0, term.row-1);
3373
3374 curx = term.c.x;
3375
3376 /* adjust position if in dummy */
3377 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3378 oldx--;
3379 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3380 curx--;
3381
3382 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3383
3384 /* remove the old cursor */
3385 sl = utf8len(term.line[oldy][oldx].c);
3386 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3387 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3388 oldy, width, sl);
3389
3390 /* draw the new one */
3391 if(!(IS_SET(MODE_HIDE))) {
3392 if(xw.state & WIN_FOCUSED) {
3393 if(IS_SET(MODE_REVERSE)) {
3394 g.mode |= ATTR_REVERSE;
3395 g.fg = defaultcs;
3396 g.bg = defaultfg;
3397 }
3398
3399 sl = utf8len(g.c);
3400 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3401 ? 2 : 1;
3402 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3403 } else {
3404 XftDrawRect(xw.draw, &dc.col[defaultcs],
3405 borderpx + curx * xw.cw,
3406 borderpx + term.c.y * xw.ch,
3407 xw.cw - 1, 1);
3408 XftDrawRect(xw.draw, &dc.col[defaultcs],
3409 borderpx + curx * xw.cw,
3410 borderpx + term.c.y * xw.ch,
3411 1, xw.ch - 1);
3412 XftDrawRect(xw.draw, &dc.col[defaultcs],
3413 borderpx + (curx + 1) * xw.cw - 1,
3414 borderpx + term.c.y * xw.ch,
3415 1, xw.ch - 1);
3416 XftDrawRect(xw.draw, &dc.col[defaultcs],
3417 borderpx + curx * xw.cw,
3418 borderpx + (term.c.y + 1) * xw.ch - 1,
3419 xw.cw, 1);
3420 }
3421 oldx = curx, oldy = term.c.y;
3422 }
3423 }
3424
3425
3426 void
3427 xsettitle(char *p) {
3428 XTextProperty prop;
3429
3430 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3431 &prop);
3432 XSetWMName(xw.dpy, xw.win, &prop);
3433 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3434 XFree(prop.value);
3435 }
3436
3437 void
3438 xresettitle(void) {
3439 xsettitle(opt_title ? opt_title : "st");
3440 }
3441
3442 void
3443 redraw(int timeout) {
3444 struct timespec tv = {0, timeout * 1000};
3445
3446 tfulldirt();
3447 draw();
3448
3449 if(timeout > 0) {
3450 nanosleep(&tv, NULL);
3451 XSync(xw.dpy, False); /* necessary for a good tput flash */
3452 }
3453 }
3454
3455 void
3456 draw(void) {
3457 drawregion(0, 0, term.col, term.row);
3458 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3459 xw.h, 0, 0);
3460 XSetForeground(xw.dpy, dc.gc,
3461 dc.col[IS_SET(MODE_REVERSE)?
3462 defaultfg : defaultbg].pixel);
3463 }
3464
3465 void
3466 drawregion(int x1, int y1, int x2, int y2) {
3467 int ic, ib, x, y, ox, sl;
3468 Glyph base, new;
3469 char buf[DRAW_BUF_SIZ];
3470 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3471 long unicodep;
3472
3473 if(!(xw.state & WIN_VISIBLE))
3474 return;
3475
3476 for(y = y1; y < y2; y++) {
3477 if(!term.dirty[y])
3478 continue;
3479
3480 xtermclear(0, y, term.col, y);
3481 term.dirty[y] = 0;
3482 base = term.line[y][0];
3483 ic = ib = ox = 0;
3484 for(x = x1; x < x2; x++) {
3485 new = term.line[y][x];
3486 if(new.mode == ATTR_WDUMMY)
3487 continue;
3488 if(ena_sel && selected(x, y))
3489 new.mode ^= ATTR_REVERSE;
3490 if(ib > 0 && (ATTRCMP(base, new)
3491 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3492 xdraws(buf, base, ox, y, ic, ib);
3493 ic = ib = 0;
3494 }
3495 if(ib == 0) {
3496 ox = x;
3497 base = new;
3498 }
3499
3500 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3501 memcpy(buf+ib, new.c, sl);
3502 ib += sl;
3503 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3504 }
3505 if(ib > 0)
3506 xdraws(buf, base, ox, y, ic, ib);
3507 }
3508 xdrawcursor();
3509 }
3510
3511 void
3512 expose(XEvent *ev) {
3513 XExposeEvent *e = &ev->xexpose;
3514
3515 if(xw.state & WIN_REDRAW) {
3516 if(!e->count)
3517 xw.state &= ~WIN_REDRAW;
3518 }
3519 redraw(0);
3520 }
3521
3522 void
3523 visibility(XEvent *ev) {
3524 XVisibilityEvent *e = &ev->xvisibility;
3525
3526 if(e->state == VisibilityFullyObscured) {
3527 xw.state &= ~WIN_VISIBLE;
3528 } else if(!(xw.state & WIN_VISIBLE)) {
3529 /* need a full redraw for next Expose, not just a buf copy */
3530 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3531 }
3532 }
3533
3534 void
3535 unmap(XEvent *ev) {
3536 xw.state &= ~WIN_VISIBLE;
3537 }
3538
3539 void
3540 xsetpointermotion(int set) {
3541 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3542 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3543 }
3544
3545 void
3546 xseturgency(int add) {
3547 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3548
3549 MODBIT(h->flags, add, XUrgencyHint);
3550 XSetWMHints(xw.dpy, xw.win, h);
3551 XFree(h);
3552 }
3553
3554 void
3555 focus(XEvent *ev) {
3556 XFocusChangeEvent *e = &ev->xfocus;
3557
3558 if(e->mode == NotifyGrab)
3559 return;
3560
3561 if(ev->type == FocusIn) {
3562 XSetICFocus(xw.xic);
3563 xw.state |= WIN_FOCUSED;
3564 xseturgency(0);
3565 if(IS_SET(MODE_FOCUS))
3566 ttywrite("\033[I", 3);
3567 } else {
3568 XUnsetICFocus(xw.xic);
3569 xw.state &= ~WIN_FOCUSED;
3570 if(IS_SET(MODE_FOCUS))
3571 ttywrite("\033[O", 3);
3572 }
3573 }
3574
3575 static inline bool
3576 match(uint mask, uint state) {
3577 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3578 }
3579
3580 void
3581 numlock(const Arg *dummy) {
3582 term.numlock ^= 1;
3583 }
3584
3585 char*
3586 kmap(KeySym k, uint state) {
3587 Key *kp;
3588 int i;
3589
3590 /* Check for mapped keys out of X11 function keys. */
3591 for(i = 0; i < LEN(mappedkeys); i++) {
3592 if(mappedkeys[i] == k)
3593 break;
3594 }
3595 if(i == LEN(mappedkeys)) {
3596 if((k & 0xFFFF) < 0xFD00)
3597 return NULL;
3598 }
3599
3600 for(kp = key; kp < key + LEN(key); kp++) {
3601 if(kp->k != k)
3602 continue;
3603
3604 if(!match(kp->mask, state))
3605 continue;
3606
3607 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3608 continue;
3609 if(term.numlock && kp->appkey == 2)
3610 continue;
3611
3612 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3613 continue;
3614
3615 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3616 continue;
3617
3618 return kp->s;
3619 }
3620
3621 return NULL;
3622 }
3623
3624 void
3625 kpress(XEvent *ev) {
3626 XKeyEvent *e = &ev->xkey;
3627 KeySym ksym;
3628 char buf[32], *customkey;
3629 int len;
3630 long c;
3631 Status status;
3632 Shortcut *bp;
3633
3634 if(IS_SET(MODE_KBDLOCK))
3635 return;
3636
3637 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3638 /* 1. shortcuts */
3639 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3640 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3641 bp->func(&(bp->arg));
3642 return;
3643 }
3644 }
3645
3646 /* 2. custom keys from config.h */
3647 if((customkey = kmap(ksym, e->state))) {
3648 ttysend(customkey, strlen(customkey));
3649 return;
3650 }
3651
3652 /* 3. composed string from input method */
3653 if(len == 0)
3654 return;
3655 if(len == 1 && e->state & Mod1Mask) {
3656 if(IS_SET(MODE_8BIT)) {
3657 if(*buf < 0177) {
3658 c = *buf | 0x80;
3659 len = utf8encode(c, buf, UTF_SIZ);
3660 }
3661 } else {
3662 buf[1] = buf[0];
3663 buf[0] = '\033';
3664 len = 2;
3665 }
3666 }
3667 ttysend(buf, len);
3668 }
3669
3670
3671 void
3672 cmessage(XEvent *e) {
3673 /*
3674 * See xembed specs
3675 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3676 */
3677 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3678 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3679 xw.state |= WIN_FOCUSED;
3680 xseturgency(0);
3681 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3682 xw.state &= ~WIN_FOCUSED;
3683 }
3684 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3685 /* Send SIGHUP to shell */
3686 kill(pid, SIGHUP);
3687 exit(EXIT_SUCCESS);
3688 }
3689 }
3690
3691 void
3692 cresize(int width, int height) {
3693 int col, row;
3694
3695 if(width != 0)
3696 xw.w = width;
3697 if(height != 0)
3698 xw.h = height;
3699
3700 col = (xw.w - 2 * borderpx) / xw.cw;
3701 row = (xw.h - 2 * borderpx) / xw.ch;
3702
3703 tresize(col, row);
3704 xresize(col, row);
3705 ttyresize();
3706 }
3707
3708 void
3709 resize(XEvent *e) {
3710 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3711 return;
3712
3713 cresize(e->xconfigure.width, e->xconfigure.height);
3714 }
3715
3716 void
3717 run(void) {
3718 XEvent ev;
3719 int w = xw.w, h = xw.h;
3720 fd_set rfd;
3721 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3722 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3723
3724 /* Waiting for window mapping */
3725 while(1) {
3726 XNextEvent(xw.dpy, &ev);
3727 if(ev.type == ConfigureNotify) {
3728 w = ev.xconfigure.width;
3729 h = ev.xconfigure.height;
3730 } else if(ev.type == MapNotify) {
3731 break;
3732 }
3733 }
3734
3735 ttynew();
3736 cresize(w, h);
3737
3738 gettimeofday(&last, NULL);
3739 lastblink = last;
3740
3741 for(xev = actionfps;;) {
3742 long deltatime;
3743
3744 FD_ZERO(&rfd);
3745 FD_SET(cmdfd, &rfd);
3746 FD_SET(xfd, &rfd);
3747
3748 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3749 if(errno == EINTR)
3750 continue;
3751 die("select failed: %s\n", strerror(errno));
3752 }
3753 if(FD_ISSET(cmdfd, &rfd)) {
3754 ttyread();
3755 if(blinktimeout) {
3756 blinkset = tattrset(ATTR_BLINK);
3757 if(!blinkset)
3758 MODBIT(term.mode, 0, MODE_BLINK);
3759 }
3760 }
3761
3762 if(FD_ISSET(xfd, &rfd))
3763 xev = actionfps;
3764
3765 gettimeofday(&now, NULL);
3766 drawtimeout.tv_sec = 0;
3767 drawtimeout.tv_usec = (1000/xfps) * 1000;
3768 tv = &drawtimeout;
3769
3770 dodraw = 0;
3771 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3772 tsetdirtattr(ATTR_BLINK);
3773 term.mode ^= MODE_BLINK;
3774 lastblink = now;
3775 dodraw = 1;
3776 }
3777 deltatime = TIMEDIFF(now, last);
3778 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3779 || deltatime < 0) {
3780 dodraw = 1;
3781 last = now;
3782 }
3783
3784 if(dodraw) {
3785 while(XPending(xw.dpy)) {
3786 XNextEvent(xw.dpy, &ev);
3787 if(XFilterEvent(&ev, None))
3788 continue;
3789 if(handler[ev.type])
3790 (handler[ev.type])(&ev);
3791 }
3792
3793 draw();
3794 XFlush(xw.dpy);
3795
3796 if(xev && !FD_ISSET(xfd, &rfd))
3797 xev--;
3798 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3799 if(blinkset) {
3800 if(TIMEDIFF(now, lastblink) \
3801 > blinktimeout) {
3802 drawtimeout.tv_usec = 1;
3803 } else {
3804 drawtimeout.tv_usec = (1000 * \
3805 (blinktimeout - \
3806 TIMEDIFF(now,
3807 lastblink)));
3808 }
3809 } else {
3810 tv = NULL;
3811 }
3812 }
3813 }
3814 }
3815 }
3816
3817 void
3818 usage(void) {
3819 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3820 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3821 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3822 }
3823
3824 int
3825 main(int argc, char *argv[]) {
3826 char *titles;
3827 uint cols = 80, rows = 24;
3828
3829 xw.l = xw.t = 0;
3830 xw.isfixed = False;
3831
3832 ARGBEGIN {
3833 case 'a':
3834 allowaltscreen = false;
3835 break;
3836 case 'c':
3837 opt_class = EARGF(usage());
3838 break;
3839 case 'e':
3840 /* eat all remaining arguments */
3841 if(argc > 1) {
3842 opt_cmd = &argv[1];
3843 if(argv[1] != NULL && opt_title == NULL) {
3844 titles = xstrdup(argv[1]);
3845 opt_title = basename(titles);
3846 }
3847 }
3848 goto run;
3849 case 'f':
3850 opt_font = EARGF(usage());
3851 break;
3852 case 'g':
3853 xw.gm = XParseGeometry(EARGF(usage()),
3854 &xw.l, &xw.t, &cols, &rows);
3855 break;
3856 case 'i':
3857 xw.isfixed = True;
3858 break;
3859 case 'o':
3860 opt_io = EARGF(usage());
3861 break;
3862 case 't':
3863 opt_title = EARGF(usage());
3864 break;
3865 case 'w':
3866 opt_embed = EARGF(usage());
3867 break;
3868 case 'v':
3869 default:
3870 usage();
3871 } ARGEND;
3872
3873 run:
3874 setlocale(LC_CTYPE, "");
3875 XSetLocaleModifiers("");
3876 tnew(cols? cols : 1, rows? rows : 1);
3877 xinit();
3878 selinit();
3879 run();
3880
3881 return 0;
3882 }
3883