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[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_nsec-t2.tv_nsec)/1E6)
80 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
81
82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
83 #define IS_TRUECOL(x) (1 << 24 & (x))
84 #define TRUERED(x) (((x) & 0xff0000) >> 8)
85 #define TRUEGREEN(x) (((x) & 0xff00))
86 #define TRUEBLUE(x) (((x) & 0xff) << 8)
87
88
89 #define VT102ID "\033[?6c"
90
91 enum glyph_attribute {
92 ATTR_NULL = 0,
93 ATTR_REVERSE = 1,
94 ATTR_UNDERLINE = 2,
95 ATTR_BOLD = 4,
96 ATTR_ITALIC = 8,
97 ATTR_BLINK = 16,
98 ATTR_WRAP = 32,
99 ATTR_WIDE = 64,
100 ATTR_WDUMMY = 128,
101 };
102
103 enum cursor_movement {
104 CURSOR_SAVE,
105 CURSOR_LOAD
106 };
107
108 enum cursor_state {
109 CURSOR_DEFAULT = 0,
110 CURSOR_WRAPNEXT = 1,
111 CURSOR_ORIGIN = 2
112 };
113
114 enum term_mode {
115 MODE_WRAP = 1,
116 MODE_INSERT = 2,
117 MODE_APPKEYPAD = 4,
118 MODE_ALTSCREEN = 8,
119 MODE_CRLF = 16,
120 MODE_MOUSEBTN = 32,
121 MODE_MOUSEMOTION = 64,
122 MODE_REVERSE = 128,
123 MODE_KBDLOCK = 256,
124 MODE_HIDE = 512,
125 MODE_ECHO = 1024,
126 MODE_APPCURSOR = 2048,
127 MODE_MOUSESGR = 4096,
128 MODE_8BIT = 8192,
129 MODE_BLINK = 16384,
130 MODE_FBLINK = 32768,
131 MODE_FOCUS = 65536,
132 MODE_MOUSEX10 = 131072,
133 MODE_MOUSEMANY = 262144,
134 MODE_BRCKTPASTE = 524288,
135 MODE_PRINT = 1048576,
136 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
137 |MODE_MOUSEMANY,
138 };
139
140 enum charset {
141 CS_GRAPHIC0,
142 CS_GRAPHIC1,
143 CS_UK,
144 CS_USA,
145 CS_MULTI,
146 CS_GER,
147 CS_FIN
148 };
149
150 enum escape_state {
151 ESC_START = 1,
152 ESC_CSI = 2,
153 ESC_STR = 4, /* DCS, OSC, PM, APC */
154 ESC_ALTCHARSET = 8,
155 ESC_STR_END = 16, /* a final string was encountered */
156 ESC_TEST = 32, /* Enter in test mode */
157 };
158
159 enum window_state {
160 WIN_VISIBLE = 1,
161 WIN_REDRAW = 2,
162 WIN_FOCUSED = 4
163 };
164
165 enum selection_type {
166 SEL_REGULAR = 1,
167 SEL_RECTANGULAR = 2
168 };
169
170 enum selection_snap {
171 SNAP_WORD = 1,
172 SNAP_LINE = 2
173 };
174
175 typedef unsigned char uchar;
176 typedef unsigned int uint;
177 typedef unsigned long ulong;
178 typedef unsigned short ushort;
179
180 typedef XftDraw *Draw;
181 typedef XftColor Color;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode;
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colormap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int l, t; /* left and top offset */
254 int gm; /* geometry mask */
255 int tw, th; /* tty width and height */
256 int w, h; /* window width and height */
257 int ch; /* char height */
258 int cw; /* char width */
259 char state; /* focus, redraw, visible */
260 } XWindow;
261
262 typedef struct {
263 uint b;
264 uint mask;
265 char *s;
266 } Mousekey;
267
268 typedef struct {
269 KeySym k;
270 uint mask;
271 char *s;
272 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
273 signed char appkey; /* application keypad */
274 signed char appcursor; /* application cursor */
275 signed char crlf; /* crlf mode */
276 } Key;
277
278 typedef struct {
279 int mode;
280 int type;
281 int snap;
282 /*
283 * Selection variables:
284 * nb – normalized coordinates of the beginning of the selection
285 * ne – normalized coordinates of the end of the selection
286 * ob – original coordinates of the beginning of the selection
287 * oe – original coordinates of the end of the selection
288 */
289 struct {
290 int x, y;
291 } nb, ne, ob, oe;
292
293 char *clip;
294 Atom xtarget;
295 bool alt;
296 struct timespec tclick1;
297 struct timespec tclick2;
298 } Selection;
299
300 typedef union {
301 int i;
302 uint ui;
303 float f;
304 const void *v;
305 } Arg;
306
307 typedef struct {
308 uint mod;
309 KeySym keysym;
310 void (*func)(const Arg *);
311 const Arg arg;
312 } Shortcut;
313
314 /* function definitions used in config.h */
315 static void clippaste(const Arg *);
316 static void numlock(const Arg *);
317 static void selpaste(const Arg *);
318 static void xzoom(const Arg *);
319 static void printsel(const Arg *);
320 static void printscreen(const Arg *) ;
321 static void toggleprinter(const Arg *);
322
323 /* Config.h for applying patches and the configuration. */
324 #include "config.h"
325
326 /* Font structure */
327 typedef struct {
328 int height;
329 int width;
330 int ascent;
331 int descent;
332 short lbearing;
333 short rbearing;
334 XftFont *match;
335 FcFontSet *set;
336 FcPattern *pattern;
337 } Font;
338
339 /* Drawing Context */
340 typedef struct {
341 Color col[MAX(LEN(colorname), 256)];
342 Font font, bfont, ifont, ibfont;
343 GC gc;
344 } DC;
345
346 static void die(const char *, ...);
347 static void draw(void);
348 static void redraw(int);
349 static void drawregion(int, int, int, int);
350 static void execsh(void);
351 static void sigchld(int);
352 static void run(void);
353
354 static void csidump(void);
355 static void csihandle(void);
356 static void csiparse(void);
357 static void csireset(void);
358 static void strdump(void);
359 static void strhandle(void);
360 static void strparse(void);
361 static void strreset(void);
362
363 static int tattrset(int);
364 static void tprinter(char *, size_t);
365 static void tdumpsel(void);
366 static void tdumpline(int);
367 static void tdump(void);
368 static void tclearregion(int, int, int, int);
369 static void tcursor(int);
370 static void tdeletechar(int);
371 static void tdeleteline(int);
372 static void tinsertblank(int);
373 static void tinsertblankline(int);
374 static void tmoveto(int, int);
375 static void tmoveato(int, int);
376 static void tnew(int, int);
377 static void tnewline(int);
378 static void tputtab(int);
379 static void tputc(char *, int);
380 static void treset(void);
381 static int tresize(int, int);
382 static void tscrollup(int, int);
383 static void tscrolldown(int, int);
384 static void tsetattr(int *, int);
385 static void tsetchar(char *, Glyph *, int, int);
386 static void tsetscroll(int, int);
387 static void tswapscreen(void);
388 static void tsetdirt(int, int);
389 static void tsetdirtattr(int);
390 static void tsetmode(bool, bool, int *, int);
391 static void tfulldirt(void);
392 static void techo(char *, int);
393 static void tcontrolcode(uchar );
394 static void tdectest(char );
395 static int32_t tdefcolor(int *, int *, int);
396 static void tdeftran(char);
397 static inline bool match(uint, uint);
398 static void ttynew(void);
399 static void ttyread(void);
400 static void ttyresize(void);
401 static void ttysend(char *, size_t);
402 static void ttywrite(const char *, size_t);
403
404 static void xdraws(char *, Glyph, int, int, int, int);
405 static void xhints(void);
406 static void xclear(int, int, int, int);
407 static void xdrawcursor(void);
408 static void xinit(void);
409 static void xloadcols(void);
410 static int xsetcolorname(int, const char *);
411 static int xgeommasktogravity(int);
412 static int xloadfont(Font *, FcPattern *);
413 static void xloadfonts(char *, double);
414 static int xloadfontset(Font *);
415 static void xsettitle(char *);
416 static void xresettitle(void);
417 static void xsetpointermotion(int);
418 static void xseturgency(int);
419 static void xsetsel(char *);
420 static void xtermclear(int, int, int, int);
421 static void xunloadfont(Font *);
422 static void xunloadfonts(void);
423 static void xresize(int, int);
424
425 static void expose(XEvent *);
426 static void visibility(XEvent *);
427 static void unmap(XEvent *);
428 static char *kmap(KeySym, uint);
429 static void kpress(XEvent *);
430 static void cmessage(XEvent *);
431 static void cresize(int, int);
432 static void resize(XEvent *);
433 static void focus(XEvent *);
434 static void brelease(XEvent *);
435 static void bpress(XEvent *);
436 static void bmotion(XEvent *);
437 static void selnotify(XEvent *);
438 static void selclear(XEvent *);
439 static void selrequest(XEvent *);
440
441 static void selinit(void);
442 static void selnormalize(void);
443 static inline bool selected(int, int);
444 static char *getsel(void);
445 static void selcopy(void);
446 static void selscroll(int, int);
447 static void selsnap(int, int *, int *, int);
448 static void getbuttoninfo(XEvent *);
449 static void mousereport(XEvent *);
450
451 static size_t utf8decode(char *, long *, size_t);
452 static long utf8decodebyte(char, size_t *);
453 static size_t utf8encode(long, char *, size_t);
454 static char utf8encodebyte(long, size_t);
455 static size_t utf8len(char *);
456 static size_t utf8validate(long *, size_t);
457
458 static ssize_t xwrite(int, const char *, size_t);
459 static void *xmalloc(size_t);
460 static void *xrealloc(void *, size_t);
461 static char *xstrdup(char *);
462
463 static void usage(void);
464
465 static void (*handler[LASTEvent])(XEvent *) = {
466 [KeyPress] = kpress,
467 [ClientMessage] = cmessage,
468 [ConfigureNotify] = resize,
469 [VisibilityNotify] = visibility,
470 [UnmapNotify] = unmap,
471 [Expose] = expose,
472 [FocusIn] = focus,
473 [FocusOut] = focus,
474 [MotionNotify] = bmotion,
475 [ButtonPress] = bpress,
476 [ButtonRelease] = brelease,
477 [SelectionClear] = selclear,
478 [SelectionNotify] = selnotify,
479 [SelectionRequest] = selrequest,
480 };
481
482 /* Globals */
483 static DC dc;
484 static XWindow xw;
485 static Term term;
486 static CSIEscape csiescseq;
487 static STREscape strescseq;
488 static int cmdfd;
489 static pid_t pid;
490 static Selection sel;
491 static int iofd = STDOUT_FILENO;
492 static char **opt_cmd = NULL;
493 static char *opt_io = NULL;
494 static char *opt_title = NULL;
495 static char *opt_embed = NULL;
496 static char *opt_class = NULL;
497 static char *opt_font = NULL;
498 static int oldbutton = 3; /* button event on startup: 3 = release */
499
500 static char *usedfont = NULL;
501 static double usedfontsize = 0;
502
503 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
504 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
505 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
506 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
507
508 /* Font Ring Cache */
509 enum {
510 FRC_NORMAL,
511 FRC_ITALIC,
512 FRC_BOLD,
513 FRC_ITALICBOLD
514 };
515
516 typedef struct {
517 XftFont *font;
518 int flags;
519 } Fontcache;
520
521 /* Fontcache is an array now. A new font will be appended to the array. */
522 static Fontcache frc[16];
523 static int frclen = 0;
524
525 ssize_t
526 xwrite(int fd, const char *s, size_t len) {
527 size_t aux = len;
528
529 while(len > 0) {
530 ssize_t r = write(fd, s, len);
531 if(r < 0)
532 return r;
533 len -= r;
534 s += r;
535 }
536 return aux;
537 }
538
539 void *
540 xmalloc(size_t len) {
541 void *p = malloc(len);
542
543 if(!p)
544 die("Out of memory\n");
545
546 return p;
547 }
548
549 void *
550 xrealloc(void *p, size_t len) {
551 if((p = realloc(p, len)) == NULL)
552 die("Out of memory\n");
553
554 return p;
555 }
556
557 char *
558 xstrdup(char *s) {
559 if((s = strdup(s)) == NULL)
560 die("Out of memory\n");
561
562 return s;
563 }
564
565 size_t
566 utf8decode(char *c, long *u, size_t clen) {
567 size_t i, j, len, type;
568 long udecoded;
569
570 *u = UTF_INVALID;
571 if(!clen)
572 return 0;
573 udecoded = utf8decodebyte(c[0], &len);
574 if(!BETWEEN(len, 1, UTF_SIZ))
575 return 1;
576 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
577 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
578 if(type != 0)
579 return j;
580 }
581 if(j < len)
582 return 0;
583 *u = udecoded;
584 utf8validate(u, len);
585 return len;
586 }
587
588 long
589 utf8decodebyte(char c, size_t *i) {
590 for(*i = 0; *i < LEN(utfmask); ++(*i))
591 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
592 return (uchar)c & ~utfmask[*i];
593 return 0;
594 }
595
596 size_t
597 utf8encode(long u, char *c, size_t clen) {
598 size_t len, i;
599
600 len = utf8validate(&u, 0);
601 if(clen < len)
602 return 0;
603 for(i = len - 1; i != 0; --i) {
604 c[i] = utf8encodebyte(u, 0);
605 u >>= 6;
606 }
607 c[0] = utf8encodebyte(u, len);
608 return len;
609 }
610
611 char
612 utf8encodebyte(long u, size_t i) {
613 return utfbyte[i] | (u & ~utfmask[i]);
614 }
615
616 size_t
617 utf8len(char *c) {
618 return utf8decode(c, &(long){0}, UTF_SIZ);
619 }
620
621 size_t
622 utf8validate(long *u, size_t i) {
623 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
624 *u = UTF_INVALID;
625 for(i = 1; *u > utfmax[i]; ++i)
626 ;
627 return i;
628 }
629
630 static void
631 selinit(void) {
632 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
633 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
634 sel.mode = 0;
635 sel.ob.x = -1;
636 sel.clip = NULL;
637 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
638 if(sel.xtarget == None)
639 sel.xtarget = XA_STRING;
640 }
641
642 static int
643 x2col(int x) {
644 x -= borderpx;
645 x /= xw.cw;
646
647 return LIMIT(x, 0, term.col-1);
648 }
649
650 static int
651 y2row(int y) {
652 y -= borderpx;
653 y /= xw.ch;
654
655 return LIMIT(y, 0, term.row-1);
656 }
657
658 static int tlinelen(int y) {
659 int i = term.col;
660
661 while (i > 0 && term.line[y][i - 1].c[0] == ' ')
662 --i;
663
664 return i;
665 }
666
667 static void
668 selnormalize(void) {
669 int i;
670
671 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
672 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
673 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
674 } else {
675 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
676 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
677 }
678 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
679 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
680
681 /* expand selection over line breaks */
682 if (sel.type == SEL_RECTANGULAR)
683 return;
684 i = tlinelen(sel.nb.y);
685 if (i < sel.nb.x)
686 sel.nb.x = i;
687 if (tlinelen(sel.ne.y) <= sel.ne.x)
688 sel.ne.x = term.col - 1;
689 }
690
691 static inline bool
692 selected(int x, int y) {
693 if(sel.type == SEL_RECTANGULAR)
694 return BETWEEN(y, sel.nb.y, sel.ne.y)
695 && BETWEEN(x, sel.nb.x, sel.ne.x);
696
697 return BETWEEN(y, sel.nb.y, sel.ne.y)
698 && (y != sel.nb.y || x >= sel.nb.x)
699 && (y != sel.ne.y || x <= sel.ne.x);
700 }
701
702 void
703 selsnap(int mode, int *x, int *y, int direction) {
704 int newx, newy, xt, yt;
705 Glyph *gp;
706
707 switch(mode) {
708 case SNAP_WORD:
709 /*
710 * Snap around if the word wraps around at the end or
711 * beginning of a line.
712 */
713 for(;;) {
714 newx = *x + direction;
715 newy = *y;
716 if(!BETWEEN(newx, 0, term.col - 1)) {
717 newy += direction;
718 newx = (newx + term.col) % term.col;
719 if (!BETWEEN(newy, 0, term.row - 1))
720 break;
721
722 if(direction > 0)
723 yt = *y, xt = *x;
724 else
725 yt = newy, xt = newx;
726 if(!(term.line[yt][xt].mode & ATTR_WRAP))
727 break;
728 }
729
730 if (newx >= tlinelen(newy))
731 break;
732
733 gp = &term.line[newy][newx];
734 if (!(gp->mode & ATTR_WDUMMY) && strchr(worddelimiters, gp->c[0]))
735 break;
736
737 *x = newx;
738 *y = newy;
739 }
740 break;
741 case SNAP_LINE:
742 /*
743 * Snap around if the the previous line or the current one
744 * has set ATTR_WRAP at its end. Then the whole next or
745 * previous line will be selected.
746 */
747 *x = (direction < 0) ? 0 : term.col - 1;
748 if(direction < 0 && *y > 0) {
749 for(; *y > 0; *y += direction) {
750 if(!(term.line[*y-1][term.col-1].mode
751 & ATTR_WRAP)) {
752 break;
753 }
754 }
755 } else if(direction > 0 && *y < term.row-1) {
756 for(; *y < term.row; *y += direction) {
757 if(!(term.line[*y][term.col-1].mode
758 & ATTR_WRAP)) {
759 break;
760 }
761 }
762 }
763 break;
764 }
765 }
766
767 void
768 getbuttoninfo(XEvent *e) {
769 int type;
770 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
771
772 sel.alt = IS_SET(MODE_ALTSCREEN);
773
774 sel.oe.x = x2col(e->xbutton.x);
775 sel.oe.y = y2row(e->xbutton.y);
776
777 if(sel.ob.y < sel.oe.y
778 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
779 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
780 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
781 } else {
782 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
783 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
784 }
785 selnormalize();
786
787 sel.type = SEL_REGULAR;
788 for(type = 1; type < LEN(selmasks); ++type) {
789 if(match(selmasks[type], state)) {
790 sel.type = type;
791 break;
792 }
793 }
794 }
795
796 void
797 mousereport(XEvent *e) {
798 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
799 button = e->xbutton.button, state = e->xbutton.state,
800 len;
801 char buf[40];
802 static int ox, oy;
803
804 /* from urxvt */
805 if(e->xbutton.type == MotionNotify) {
806 if(x == ox && y == oy)
807 return;
808 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
809 return;
810 /* MOUSE_MOTION: no reporting if no button is pressed */
811 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
812 return;
813
814 button = oldbutton + 32;
815 ox = x;
816 oy = y;
817 } else {
818 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
819 button = 3;
820 } else {
821 button -= Button1;
822 if(button >= 3)
823 button += 64 - 3;
824 }
825 if(e->xbutton.type == ButtonPress) {
826 oldbutton = button;
827 ox = x;
828 oy = y;
829 } else if(e->xbutton.type == ButtonRelease) {
830 oldbutton = 3;
831 /* MODE_MOUSEX10: no button release reporting */
832 if(IS_SET(MODE_MOUSEX10))
833 return;
834 if (button == 64 || button == 65)
835 return;
836 }
837 }
838
839 if(!IS_SET(MODE_MOUSEX10)) {
840 button += (state & ShiftMask ? 4 : 0)
841 + (state & Mod4Mask ? 8 : 0)
842 + (state & ControlMask ? 16 : 0);
843 }
844
845 len = 0;
846 if(IS_SET(MODE_MOUSESGR)) {
847 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
848 button, x+1, y+1,
849 e->xbutton.type == ButtonRelease ? 'm' : 'M');
850 } else if(x < 223 && y < 223) {
851 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
852 32+button, 32+x+1, 32+y+1);
853 } else {
854 return;
855 }
856
857 ttywrite(buf, len);
858 }
859
860 void
861 bpress(XEvent *e) {
862 struct timespec now;
863 Mousekey *mk;
864
865 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
866 mousereport(e);
867 return;
868 }
869
870 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
871 if(e->xbutton.button == mk->b
872 && match(mk->mask, e->xbutton.state)) {
873 ttysend(mk->s, strlen(mk->s));
874 return;
875 }
876 }
877
878 if(e->xbutton.button == Button1) {
879 clock_gettime(CLOCK_MONOTONIC, &now);
880
881 /* Clear previous selection, logically and visually. */
882 selclear(NULL);
883 sel.mode = 1;
884 sel.type = SEL_REGULAR;
885 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
886 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
887
888 /*
889 * If the user clicks below predefined timeouts specific
890 * snapping behaviour is exposed.
891 */
892 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
893 sel.snap = SNAP_LINE;
894 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
895 sel.snap = SNAP_WORD;
896 } else {
897 sel.snap = 0;
898 }
899 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
900 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
901 selnormalize();
902
903 /*
904 * Draw selection, unless it's regular and we don't want to
905 * make clicks visible
906 */
907 if(sel.snap != 0) {
908 sel.mode++;
909 tsetdirt(sel.nb.y, sel.ne.y);
910 }
911 sel.tclick2 = sel.tclick1;
912 sel.tclick1 = now;
913 }
914 }
915
916 char *
917 getsel(void) {
918 char *str, *ptr;
919 int x, y, bufsize, size, ex;
920 Glyph *gp, *last;
921
922 if(sel.ob.x == -1)
923 return NULL;
924
925 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
926 ptr = str = xmalloc(bufsize);
927
928 /* append every set & selected glyph to the selection */
929 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
930 gp = &term.line[y][0];
931 last = &gp[term.col-1];
932
933 while(last >= gp && !(selected(last - gp, y) &&
934 strcmp(last->c, " ") != 0)) {
935 --last;
936 }
937
938 for(x = 0; gp <= last; x++, ++gp) {
939 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
940 continue;
941
942 size = utf8len(gp->c);
943 memcpy(ptr, gp->c, size);
944 ptr += size;
945 }
946
947 /*
948 * Copy and pasting of line endings is inconsistent
949 * in the inconsistent terminal and GUI world.
950 * The best solution seems like to produce '\n' when
951 * something is copied from st and convert '\n' to
952 * '\r', when something to be pasted is received by
953 * st.
954 * FIXME: Fix the computer world.
955 */
956 if(y < sel.ne.y && !(x > 0 && (gp-1)->mode & ATTR_WRAP))
957 *ptr++ = '\n';
958
959 /*
960 * If the last selected line expands in the selection
961 * after the visible text '\n' is appended.
962 */
963 if(y == sel.ne.y) {
964 ex = sel.ne.x;
965 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
966 ex = sel.nb.x;
967 if(tlinelen(y) < ex)
968 *ptr++ = '\n';
969 }
970 }
971 *ptr = 0;
972 return str;
973 }
974
975 void
976 selcopy(void) {
977 xsetsel(getsel());
978 }
979
980 void
981 selnotify(XEvent *e) {
982 ulong nitems, ofs, rem;
983 int format;
984 uchar *data, *last, *repl;
985 Atom type;
986
987 ofs = 0;
988 do {
989 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
990 False, AnyPropertyType, &type, &format,
991 &nitems, &rem, &data)) {
992 fprintf(stderr, "Clipboard allocation failed\n");
993 return;
994 }
995
996 /*
997 * As seen in getsel:
998 * Line endings are inconsistent in the terminal and GUI world
999 * copy and pasting. When receiving some selection data,
1000 * replace all '\n' with '\r'.
1001 * FIXME: Fix the computer world.
1002 */
1003 repl = data;
1004 last = data + nitems * format / 8;
1005 while((repl = memchr(repl, '\n', last - repl))) {
1006 *repl++ = '\r';
1007 }
1008
1009 if(IS_SET(MODE_BRCKTPASTE))
1010 ttywrite("\033[200~", 6);
1011 ttysend((char *)data, nitems * format / 8);
1012 if(IS_SET(MODE_BRCKTPASTE))
1013 ttywrite("\033[201~", 6);
1014 XFree(data);
1015 /* number of 32-bit chunks returned */
1016 ofs += nitems * format / 32;
1017 } while(rem > 0);
1018 }
1019
1020 void
1021 selpaste(const Arg *dummy) {
1022 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1023 xw.win, CurrentTime);
1024 }
1025
1026 void
1027 clippaste(const Arg *dummy) {
1028 Atom clipboard;
1029
1030 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1031 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1032 xw.win, CurrentTime);
1033 }
1034
1035 void
1036 selclear(XEvent *e) {
1037 if(sel.ob.x == -1)
1038 return;
1039 sel.ob.x = -1;
1040 tsetdirt(sel.nb.y, sel.ne.y);
1041 }
1042
1043 void
1044 selrequest(XEvent *e) {
1045 XSelectionRequestEvent *xsre;
1046 XSelectionEvent xev;
1047 Atom xa_targets, string;
1048
1049 xsre = (XSelectionRequestEvent *) e;
1050 xev.type = SelectionNotify;
1051 xev.requestor = xsre->requestor;
1052 xev.selection = xsre->selection;
1053 xev.target = xsre->target;
1054 xev.time = xsre->time;
1055 /* reject */
1056 xev.property = None;
1057
1058 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1059 if(xsre->target == xa_targets) {
1060 /* respond with the supported type */
1061 string = sel.xtarget;
1062 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1063 XA_ATOM, 32, PropModeReplace,
1064 (uchar *) &string, 1);
1065 xev.property = xsre->property;
1066 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1067 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1068 xsre->target, 8, PropModeReplace,
1069 (uchar *) sel.clip, strlen(sel.clip));
1070 xev.property = xsre->property;
1071 }
1072
1073 /* all done, send a notification to the listener */
1074 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1075 fprintf(stderr, "Error sending SelectionNotify event\n");
1076 }
1077
1078 void
1079 xsetsel(char *str) {
1080 /* register the selection for both the clipboard and the primary */
1081 Atom clipboard;
1082
1083 free(sel.clip);
1084 sel.clip = str;
1085
1086 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1087
1088 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1089 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1090 }
1091
1092 void
1093 brelease(XEvent *e) {
1094 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1095 mousereport(e);
1096 return;
1097 }
1098
1099 if(e->xbutton.button == Button2) {
1100 selpaste(NULL);
1101 } else if(e->xbutton.button == Button1) {
1102 if(sel.mode < 2) {
1103 selclear(NULL);
1104 } else {
1105 getbuttoninfo(e);
1106 selcopy();
1107 }
1108 sel.mode = 0;
1109 tsetdirt(sel.nb.y, sel.ne.y);
1110 }
1111 }
1112
1113 void
1114 bmotion(XEvent *e) {
1115 int oldey, oldex, oldsby, oldsey;
1116
1117 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1118 mousereport(e);
1119 return;
1120 }
1121
1122 if(!sel.mode)
1123 return;
1124
1125 sel.mode++;
1126 oldey = sel.oe.y;
1127 oldex = sel.oe.x;
1128 oldsby = sel.nb.y;
1129 oldsey = sel.ne.y;
1130 getbuttoninfo(e);
1131
1132 if(oldey != sel.oe.y || oldex != sel.oe.x)
1133 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1134 }
1135
1136 void
1137 die(const char *errstr, ...) {
1138 va_list ap;
1139
1140 va_start(ap, errstr);
1141 vfprintf(stderr, errstr, ap);
1142 va_end(ap);
1143 exit(EXIT_FAILURE);
1144 }
1145
1146 void
1147 execsh(void) {
1148 char **args;
1149 char *envshell = getenv("SHELL");
1150 const struct passwd *pass = getpwuid(getuid());
1151 char buf[sizeof(long) * 8 + 1];
1152
1153 unsetenv("COLUMNS");
1154 unsetenv("LINES");
1155 unsetenv("TERMCAP");
1156
1157 if(pass) {
1158 setenv("LOGNAME", pass->pw_name, 1);
1159 setenv("USER", pass->pw_name, 1);
1160 setenv("SHELL", pass->pw_shell, 0);
1161 setenv("HOME", pass->pw_dir, 0);
1162 }
1163
1164 snprintf(buf, sizeof(buf), "%lu", xw.win);
1165 setenv("WINDOWID", buf, 1);
1166
1167 signal(SIGCHLD, SIG_DFL);
1168 signal(SIGHUP, SIG_DFL);
1169 signal(SIGINT, SIG_DFL);
1170 signal(SIGQUIT, SIG_DFL);
1171 signal(SIGTERM, SIG_DFL);
1172 signal(SIGALRM, SIG_DFL);
1173
1174 DEFAULT(envshell, shell);
1175 setenv("TERM", termname, 1);
1176 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1177 execvp(args[0], args);
1178 exit(EXIT_FAILURE);
1179 }
1180
1181 void
1182 sigchld(int a) {
1183 int stat = 0;
1184
1185 if(waitpid(pid, &stat, 0) < 0)
1186 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1187
1188 if(WIFEXITED(stat)) {
1189 exit(WEXITSTATUS(stat));
1190 } else {
1191 exit(EXIT_FAILURE);
1192 }
1193 }
1194
1195 void
1196 ttynew(void) {
1197 int m, s;
1198 struct winsize w = {term.row, term.col, 0, 0};
1199
1200 /* seems to work fine on linux, openbsd and freebsd */
1201 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1202 die("openpty failed: %s\n", strerror(errno));
1203
1204 switch(pid = fork()) {
1205 case -1:
1206 die("fork failed\n");
1207 break;
1208 case 0:
1209 setsid(); /* create a new process group */
1210 dup2(s, STDIN_FILENO);
1211 dup2(s, STDOUT_FILENO);
1212 dup2(s, STDERR_FILENO);
1213 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1214 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1215 close(s);
1216 close(m);
1217 execsh();
1218 break;
1219 default:
1220 close(s);
1221 cmdfd = m;
1222 signal(SIGCHLD, sigchld);
1223 if(opt_io) {
1224 term.mode |= MODE_PRINT;
1225 iofd = (!strcmp(opt_io, "-")) ?
1226 STDOUT_FILENO :
1227 open(opt_io, O_WRONLY | O_CREAT, 0666);
1228 if(iofd < 0) {
1229 fprintf(stderr, "Error opening %s:%s\n",
1230 opt_io, strerror(errno));
1231 }
1232 }
1233 break;
1234 }
1235 }
1236
1237 void
1238 ttyread(void) {
1239 static char buf[BUFSIZ];
1240 static int buflen = 0;
1241 char *ptr;
1242 char s[UTF_SIZ];
1243 int charsize; /* size of utf8 char in bytes */
1244 long unicodep;
1245 int ret;
1246
1247 /* append read bytes to unprocessed bytes */
1248 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1249 die("Couldn't read from shell: %s\n", strerror(errno));
1250
1251 /* process every complete utf8 char */
1252 buflen += ret;
1253 ptr = buf;
1254 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1255 utf8encode(unicodep, s, UTF_SIZ);
1256 tputc(s, charsize);
1257 ptr += charsize;
1258 buflen -= charsize;
1259 }
1260
1261 /* keep any uncomplete utf8 char for the next call */
1262 memmove(buf, ptr, buflen);
1263 }
1264
1265 void
1266 ttywrite(const char *s, size_t n) {
1267 if(xwrite(cmdfd, s, n) == -1)
1268 die("write error on tty: %s\n", strerror(errno));
1269 }
1270
1271 void
1272 ttysend(char *s, size_t n) {
1273 ttywrite(s, n);
1274 if(IS_SET(MODE_ECHO))
1275 techo(s, n);
1276 }
1277
1278 void
1279 ttyresize(void) {
1280 struct winsize w;
1281
1282 w.ws_row = term.row;
1283 w.ws_col = term.col;
1284 w.ws_xpixel = xw.tw;
1285 w.ws_ypixel = xw.th;
1286 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1287 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1288 }
1289
1290 int
1291 tattrset(int attr) {
1292 int i, j;
1293
1294 for(i = 0; i < term.row-1; i++) {
1295 for(j = 0; j < term.col-1; j++) {
1296 if(term.line[i][j].mode & attr)
1297 return 1;
1298 }
1299 }
1300
1301 return 0;
1302 }
1303
1304 void
1305 tsetdirt(int top, int bot) {
1306 int i;
1307
1308 LIMIT(top, 0, term.row-1);
1309 LIMIT(bot, 0, term.row-1);
1310
1311 for(i = top; i <= bot; i++)
1312 term.dirty[i] = 1;
1313 }
1314
1315 void
1316 tsetdirtattr(int attr) {
1317 int i, j;
1318
1319 for(i = 0; i < term.row-1; i++) {
1320 for(j = 0; j < term.col-1; j++) {
1321 if(term.line[i][j].mode & attr) {
1322 tsetdirt(i, i);
1323 break;
1324 }
1325 }
1326 }
1327 }
1328
1329 void
1330 tfulldirt(void) {
1331 tsetdirt(0, term.row-1);
1332 }
1333
1334 void
1335 tcursor(int mode) {
1336 static TCursor c[2];
1337 bool alt = IS_SET(MODE_ALTSCREEN);
1338
1339 if(mode == CURSOR_SAVE) {
1340 c[alt] = term.c;
1341 } else if(mode == CURSOR_LOAD) {
1342 term.c = c[alt];
1343 tmoveto(c[alt].x, c[alt].y);
1344 }
1345 }
1346
1347 void
1348 treset(void) {
1349 uint i;
1350
1351 term.c = (TCursor){{
1352 .mode = ATTR_NULL,
1353 .fg = defaultfg,
1354 .bg = defaultbg
1355 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1356
1357 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1358 for(i = tabspaces; i < term.col; i += tabspaces)
1359 term.tabs[i] = 1;
1360 term.top = 0;
1361 term.bot = term.row - 1;
1362 term.mode = MODE_WRAP;
1363 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1364 term.charset = 0;
1365
1366 tclearregion(0, 0, term.col-1, term.row-1);
1367 tmoveto(0, 0);
1368 tcursor(CURSOR_SAVE);
1369 }
1370
1371 void
1372 tnew(int col, int row) {
1373 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1374 tresize(col, row);
1375 term.numlock = 1;
1376
1377 treset();
1378 }
1379
1380 void
1381 tswapscreen(void) {
1382 Line *tmp = term.line;
1383
1384 term.line = term.alt;
1385 term.alt = tmp;
1386 term.mode ^= MODE_ALTSCREEN;
1387 tfulldirt();
1388 }
1389
1390 void
1391 tscrolldown(int orig, int n) {
1392 int i;
1393 Line temp;
1394
1395 LIMIT(n, 0, term.bot-orig+1);
1396
1397 tsetdirt(orig, term.bot-n);
1398 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1399
1400 for(i = term.bot; i >= orig+n; i--) {
1401 temp = term.line[i];
1402 term.line[i] = term.line[i-n];
1403 term.line[i-n] = temp;
1404 }
1405
1406 selscroll(orig, n);
1407 }
1408
1409 void
1410 tscrollup(int orig, int n) {
1411 int i;
1412 Line temp;
1413
1414 LIMIT(n, 0, term.bot-orig+1);
1415
1416 tclearregion(0, orig, term.col-1, orig+n-1);
1417 tsetdirt(orig+n, term.bot);
1418
1419 for(i = orig; i <= term.bot-n; i++) {
1420 temp = term.line[i];
1421 term.line[i] = term.line[i+n];
1422 term.line[i+n] = temp;
1423 }
1424
1425 selscroll(orig, -n);
1426 }
1427
1428 void
1429 selscroll(int orig, int n) {
1430 if(sel.ob.x == -1)
1431 return;
1432
1433 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1434 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1435 selclear(NULL);
1436 return;
1437 }
1438 if(sel.type == SEL_RECTANGULAR) {
1439 if(sel.ob.y < term.top)
1440 sel.ob.y = term.top;
1441 if(sel.oe.y > term.bot)
1442 sel.oe.y = term.bot;
1443 } else {
1444 if(sel.ob.y < term.top) {
1445 sel.ob.y = term.top;
1446 sel.ob.x = 0;
1447 }
1448 if(sel.oe.y > term.bot) {
1449 sel.oe.y = term.bot;
1450 sel.oe.x = term.col;
1451 }
1452 }
1453 selnormalize();
1454 }
1455 }
1456
1457 void
1458 tnewline(int first_col) {
1459 int y = term.c.y;
1460
1461 if(y == term.bot) {
1462 tscrollup(term.top, 1);
1463 } else {
1464 y++;
1465 }
1466 tmoveto(first_col ? 0 : term.c.x, y);
1467 }
1468
1469 void
1470 csiparse(void) {
1471 char *p = csiescseq.buf, *np;
1472 long int v;
1473
1474 csiescseq.narg = 0;
1475 if(*p == '?') {
1476 csiescseq.priv = 1;
1477 p++;
1478 }
1479
1480 csiescseq.buf[csiescseq.len] = '\0';
1481 while(p < csiescseq.buf+csiescseq.len) {
1482 np = NULL;
1483 v = strtol(p, &np, 10);
1484 if(np == p)
1485 v = 0;
1486 if(v == LONG_MAX || v == LONG_MIN)
1487 v = -1;
1488 csiescseq.arg[csiescseq.narg++] = v;
1489 p = np;
1490 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1491 break;
1492 p++;
1493 }
1494 csiescseq.mode = *p;
1495 }
1496
1497 /* for absolute user moves, when decom is set */
1498 void
1499 tmoveato(int x, int y) {
1500 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1501 }
1502
1503 void
1504 tmoveto(int x, int y) {
1505 int miny, maxy;
1506
1507 if(term.c.state & CURSOR_ORIGIN) {
1508 miny = term.top;
1509 maxy = term.bot;
1510 } else {
1511 miny = 0;
1512 maxy = term.row - 1;
1513 }
1514 LIMIT(x, 0, term.col-1);
1515 LIMIT(y, miny, maxy);
1516 term.c.state &= ~CURSOR_WRAPNEXT;
1517 term.c.x = x;
1518 term.c.y = y;
1519 }
1520
1521 void
1522 tsetchar(char *c, Glyph *attr, int x, int y) {
1523 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1524 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1525 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1526 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1527 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1528 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1529 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1530 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1531 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1532 };
1533
1534 /*
1535 * The table is proudly stolen from rxvt.
1536 */
1537 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1538 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1539 c = vt100_0[c[0] - 0x41];
1540 }
1541 }
1542
1543 if(term.line[y][x].mode & ATTR_WIDE) {
1544 if(x+1 < term.col) {
1545 term.line[y][x+1].c[0] = ' ';
1546 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1547 }
1548 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1549 term.line[y][x-1].c[0] = ' ';
1550 term.line[y][x-1].mode &= ~ATTR_WIDE;
1551 }
1552
1553 term.dirty[y] = 1;
1554 term.line[y][x] = *attr;
1555 memcpy(term.line[y][x].c, c, UTF_SIZ);
1556 }
1557
1558 void
1559 tclearregion(int x1, int y1, int x2, int y2) {
1560 int x, y, temp;
1561
1562 if(x1 > x2)
1563 temp = x1, x1 = x2, x2 = temp;
1564 if(y1 > y2)
1565 temp = y1, y1 = y2, y2 = temp;
1566
1567 LIMIT(x1, 0, term.col-1);
1568 LIMIT(x2, 0, term.col-1);
1569 LIMIT(y1, 0, term.row-1);
1570 LIMIT(y2, 0, term.row-1);
1571
1572 for(y = y1; y <= y2; y++) {
1573 term.dirty[y] = 1;
1574 for(x = x1; x <= x2; x++) {
1575 if(selected(x, y))
1576 selclear(NULL);
1577 term.line[y][x] = term.c.attr;
1578 memcpy(term.line[y][x].c, " ", 2);
1579 }
1580 }
1581 }
1582
1583 void
1584 tdeletechar(int n) {
1585 int dst, src, size;
1586 Glyph *line;
1587
1588 LIMIT(n, 0, term.col - term.c.x);
1589
1590 dst = term.c.x;
1591 src = term.c.x + n;
1592 size = term.col - src;
1593 line = term.line[term.c.y];
1594
1595 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1596 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1597 }
1598
1599 void
1600 tinsertblank(int n) {
1601 int dst, src, size;
1602 Glyph *line;
1603
1604 LIMIT(n, 0, term.col - term.c.x);
1605
1606 dst = term.c.x + n;
1607 src = term.c.x;
1608 size = term.col - dst;
1609 line = term.line[term.c.y];
1610
1611 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1612 tclearregion(src, term.c.y, dst - 1, term.c.y);
1613 }
1614
1615 void
1616 tinsertblankline(int n) {
1617 if(BETWEEN(term.c.y, term.top, term.bot))
1618 tscrolldown(term.c.y, n);
1619 }
1620
1621 void
1622 tdeleteline(int n) {
1623 if(BETWEEN(term.c.y, term.top, term.bot))
1624 tscrollup(term.c.y, n);
1625 }
1626
1627 int32_t
1628 tdefcolor(int *attr, int *npar, int l) {
1629 int32_t idx = -1;
1630 uint r, g, b;
1631
1632 switch (attr[*npar + 1]) {
1633 case 2: /* direct color in RGB space */
1634 if (*npar + 4 >= l) {
1635 fprintf(stderr,
1636 "erresc(38): Incorrect number of parameters (%d)\n",
1637 *npar);
1638 break;
1639 }
1640 r = attr[*npar + 2];
1641 g = attr[*npar + 3];
1642 b = attr[*npar + 4];
1643 *npar += 4;
1644 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1645 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1646 r, g, b);
1647 else
1648 idx = TRUECOLOR(r, g, b);
1649 break;
1650 case 5: /* indexed color */
1651 if (*npar + 2 >= l) {
1652 fprintf(stderr,
1653 "erresc(38): Incorrect number of parameters (%d)\n",
1654 *npar);
1655 break;
1656 }
1657 *npar += 2;
1658 if(!BETWEEN(attr[*npar], 0, 255))
1659 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1660 else
1661 idx = attr[*npar];
1662 break;
1663 case 0: /* implemented defined (only foreground) */
1664 case 1: /* transparent */
1665 case 3: /* direct color in CMY space */
1666 case 4: /* direct color in CMYK space */
1667 default:
1668 fprintf(stderr,
1669 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1670 break;
1671 }
1672
1673 return idx;
1674 }
1675
1676 void
1677 tsetattr(int *attr, int l) {
1678 int i;
1679 int32_t idx;
1680
1681 for(i = 0; i < l; i++) {
1682 switch(attr[i]) {
1683 case 0:
1684 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1685 | ATTR_BOLD | ATTR_ITALIC \
1686 | ATTR_BLINK);
1687 term.c.attr.fg = defaultfg;
1688 term.c.attr.bg = defaultbg;
1689 break;
1690 case 1:
1691 term.c.attr.mode |= ATTR_BOLD;
1692 break;
1693 case 3:
1694 term.c.attr.mode |= ATTR_ITALIC;
1695 break;
1696 case 4:
1697 term.c.attr.mode |= ATTR_UNDERLINE;
1698 break;
1699 case 5: /* slow blink */
1700 case 6: /* rapid blink */
1701 term.c.attr.mode |= ATTR_BLINK;
1702 break;
1703 case 7:
1704 term.c.attr.mode |= ATTR_REVERSE;
1705 break;
1706 case 21:
1707 case 22:
1708 term.c.attr.mode &= ~ATTR_BOLD;
1709 break;
1710 case 23:
1711 term.c.attr.mode &= ~ATTR_ITALIC;
1712 break;
1713 case 24:
1714 term.c.attr.mode &= ~ATTR_UNDERLINE;
1715 break;
1716 case 25:
1717 case 26:
1718 term.c.attr.mode &= ~ATTR_BLINK;
1719 break;
1720 case 27:
1721 term.c.attr.mode &= ~ATTR_REVERSE;
1722 break;
1723 case 38:
1724 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1725 term.c.attr.fg = idx;
1726 break;
1727 case 39:
1728 term.c.attr.fg = defaultfg;
1729 break;
1730 case 48:
1731 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1732 term.c.attr.bg = idx;
1733 break;
1734 case 49:
1735 term.c.attr.bg = defaultbg;
1736 break;
1737 default:
1738 if(BETWEEN(attr[i], 30, 37)) {
1739 term.c.attr.fg = attr[i] - 30;
1740 } else if(BETWEEN(attr[i], 40, 47)) {
1741 term.c.attr.bg = attr[i] - 40;
1742 } else if(BETWEEN(attr[i], 90, 97)) {
1743 term.c.attr.fg = attr[i] - 90 + 8;
1744 } else if(BETWEEN(attr[i], 100, 107)) {
1745 term.c.attr.bg = attr[i] - 100 + 8;
1746 } else {
1747 fprintf(stderr,
1748 "erresc(default): gfx attr %d unknown\n",
1749 attr[i]), csidump();
1750 }
1751 break;
1752 }
1753 }
1754 }
1755
1756 void
1757 tsetscroll(int t, int b) {
1758 int temp;
1759
1760 LIMIT(t, 0, term.row-1);
1761 LIMIT(b, 0, term.row-1);
1762 if(t > b) {
1763 temp = t;
1764 t = b;
1765 b = temp;
1766 }
1767 term.top = t;
1768 term.bot = b;
1769 }
1770
1771 void
1772 tsetmode(bool priv, bool set, int *args, int narg) {
1773 int *lim, mode;
1774 bool alt;
1775
1776 for(lim = args + narg; args < lim; ++args) {
1777 if(priv) {
1778 switch(*args) {
1779 case 1: /* DECCKM -- Cursor key */
1780 MODBIT(term.mode, set, MODE_APPCURSOR);
1781 break;
1782 case 5: /* DECSCNM -- Reverse video */
1783 mode = term.mode;
1784 MODBIT(term.mode, set, MODE_REVERSE);
1785 if(mode != term.mode)
1786 redraw(REDRAW_TIMEOUT);
1787 break;
1788 case 6: /* DECOM -- Origin */
1789 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1790 tmoveato(0, 0);
1791 break;
1792 case 7: /* DECAWM -- Auto wrap */
1793 MODBIT(term.mode, set, MODE_WRAP);
1794 break;
1795 case 0: /* Error (IGNORED) */
1796 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1797 case 3: /* DECCOLM -- Column (IGNORED) */
1798 case 4: /* DECSCLM -- Scroll (IGNORED) */
1799 case 8: /* DECARM -- Auto repeat (IGNORED) */
1800 case 18: /* DECPFF -- Printer feed (IGNORED) */
1801 case 19: /* DECPEX -- Printer extent (IGNORED) */
1802 case 42: /* DECNRCM -- National characters (IGNORED) */
1803 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1804 break;
1805 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1806 MODBIT(term.mode, !set, MODE_HIDE);
1807 break;
1808 case 9: /* X10 mouse compatibility mode */
1809 xsetpointermotion(0);
1810 MODBIT(term.mode, 0, MODE_MOUSE);
1811 MODBIT(term.mode, set, MODE_MOUSEX10);
1812 break;
1813 case 1000: /* 1000: report button press */
1814 xsetpointermotion(0);
1815 MODBIT(term.mode, 0, MODE_MOUSE);
1816 MODBIT(term.mode, set, MODE_MOUSEBTN);
1817 break;
1818 case 1002: /* 1002: report motion on button press */
1819 xsetpointermotion(0);
1820 MODBIT(term.mode, 0, MODE_MOUSE);
1821 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1822 break;
1823 case 1003: /* 1003: enable all mouse motions */
1824 xsetpointermotion(set);
1825 MODBIT(term.mode, 0, MODE_MOUSE);
1826 MODBIT(term.mode, set, MODE_MOUSEMANY);
1827 break;
1828 case 1004: /* 1004: send focus events to tty */
1829 MODBIT(term.mode, set, MODE_FOCUS);
1830 break;
1831 case 1006: /* 1006: extended reporting mode */
1832 MODBIT(term.mode, set, MODE_MOUSESGR);
1833 break;
1834 case 1034:
1835 MODBIT(term.mode, set, MODE_8BIT);
1836 break;
1837 case 1049: /* swap screen & set/restore cursor as xterm */
1838 if (!allowaltscreen)
1839 break;
1840 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1841 /* FALLTHROUGH */
1842 case 47: /* swap screen */
1843 case 1047:
1844 if (!allowaltscreen)
1845 break;
1846 alt = IS_SET(MODE_ALTSCREEN);
1847 if(alt) {
1848 tclearregion(0, 0, term.col-1,
1849 term.row-1);
1850 }
1851 if(set ^ alt) /* set is always 1 or 0 */
1852 tswapscreen();
1853 if(*args != 1049)
1854 break;
1855 /* FALLTHROUGH */
1856 case 1048:
1857 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1858 break;
1859 case 2004: /* 2004: bracketed paste mode */
1860 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1861 break;
1862 /* Not implemented mouse modes. See comments there. */
1863 case 1001: /* mouse highlight mode; can hang the
1864 terminal by design when implemented. */
1865 case 1005: /* UTF-8 mouse mode; will confuse
1866 applications not supporting UTF-8
1867 and luit. */
1868 case 1015: /* urxvt mangled mouse mode; incompatible
1869 and can be mistaken for other control
1870 codes. */
1871 default:
1872 fprintf(stderr,
1873 "erresc: unknown private set/reset mode %d\n",
1874 *args);
1875 break;
1876 }
1877 } else {
1878 switch(*args) {
1879 case 0: /* Error (IGNORED) */
1880 break;
1881 case 2: /* KAM -- keyboard action */
1882 MODBIT(term.mode, set, MODE_KBDLOCK);
1883 break;
1884 case 4: /* IRM -- Insertion-replacement */
1885 MODBIT(term.mode, set, MODE_INSERT);
1886 break;
1887 case 12: /* SRM -- Send/Receive */
1888 MODBIT(term.mode, !set, MODE_ECHO);
1889 break;
1890 case 20: /* LNM -- Linefeed/new line */
1891 MODBIT(term.mode, set, MODE_CRLF);
1892 break;
1893 default:
1894 fprintf(stderr,
1895 "erresc: unknown set/reset mode %d\n",
1896 *args);
1897 break;
1898 }
1899 }
1900 }
1901 }
1902
1903 void
1904 csihandle(void) {
1905 char buf[40];
1906 int len;
1907
1908 switch(csiescseq.mode) {
1909 default:
1910 unknown:
1911 fprintf(stderr, "erresc: unknown csi ");
1912 csidump();
1913 /* die(""); */
1914 break;
1915 case '@': /* ICH -- Insert <n> blank char */
1916 DEFAULT(csiescseq.arg[0], 1);
1917 tinsertblank(csiescseq.arg[0]);
1918 break;
1919 case 'A': /* CUU -- Cursor <n> Up */
1920 DEFAULT(csiescseq.arg[0], 1);
1921 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1922 break;
1923 case 'B': /* CUD -- Cursor <n> Down */
1924 case 'e': /* VPR --Cursor <n> Down */
1925 DEFAULT(csiescseq.arg[0], 1);
1926 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1927 break;
1928 case 'i': /* MC -- Media Copy */
1929 switch(csiescseq.arg[0]) {
1930 case 0:
1931 tdump();
1932 break;
1933 case 1:
1934 tdumpline(term.c.y);
1935 break;
1936 case 2:
1937 tdumpsel();
1938 break;
1939 case 4:
1940 term.mode &= ~MODE_PRINT;
1941 break;
1942 case 5:
1943 term.mode |= MODE_PRINT;
1944 break;
1945 }
1946 break;
1947 case 'c': /* DA -- Device Attributes */
1948 if(csiescseq.arg[0] == 0)
1949 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1950 break;
1951 case 'C': /* CUF -- Cursor <n> Forward */
1952 case 'a': /* HPR -- Cursor <n> Forward */
1953 DEFAULT(csiescseq.arg[0], 1);
1954 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1955 break;
1956 case 'D': /* CUB -- Cursor <n> Backward */
1957 DEFAULT(csiescseq.arg[0], 1);
1958 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1959 break;
1960 case 'E': /* CNL -- Cursor <n> Down and first col */
1961 DEFAULT(csiescseq.arg[0], 1);
1962 tmoveto(0, term.c.y+csiescseq.arg[0]);
1963 break;
1964 case 'F': /* CPL -- Cursor <n> Up and first col */
1965 DEFAULT(csiescseq.arg[0], 1);
1966 tmoveto(0, term.c.y-csiescseq.arg[0]);
1967 break;
1968 case 'g': /* TBC -- Tabulation clear */
1969 switch(csiescseq.arg[0]) {
1970 case 0: /* clear current tab stop */
1971 term.tabs[term.c.x] = 0;
1972 break;
1973 case 3: /* clear all the tabs */
1974 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1975 break;
1976 default:
1977 goto unknown;
1978 }
1979 break;
1980 case 'G': /* CHA -- Move to <col> */
1981 case '`': /* HPA */
1982 DEFAULT(csiescseq.arg[0], 1);
1983 tmoveto(csiescseq.arg[0]-1, term.c.y);
1984 break;
1985 case 'H': /* CUP -- Move to <row> <col> */
1986 case 'f': /* HVP */
1987 DEFAULT(csiescseq.arg[0], 1);
1988 DEFAULT(csiescseq.arg[1], 1);
1989 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1990 break;
1991 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1992 DEFAULT(csiescseq.arg[0], 1);
1993 tputtab(csiescseq.arg[0]);
1994 break;
1995 case 'J': /* ED -- Clear screen */
1996 selclear(NULL);
1997 switch(csiescseq.arg[0]) {
1998 case 0: /* below */
1999 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2000 if(term.c.y < term.row-1) {
2001 tclearregion(0, term.c.y+1, term.col-1,
2002 term.row-1);
2003 }
2004 break;
2005 case 1: /* above */
2006 if(term.c.y > 1)
2007 tclearregion(0, 0, term.col-1, term.c.y-1);
2008 tclearregion(0, term.c.y, term.c.x, term.c.y);
2009 break;
2010 case 2: /* all */
2011 tclearregion(0, 0, term.col-1, term.row-1);
2012 break;
2013 default:
2014 goto unknown;
2015 }
2016 break;
2017 case 'K': /* EL -- Clear line */
2018 switch(csiescseq.arg[0]) {
2019 case 0: /* right */
2020 tclearregion(term.c.x, term.c.y, term.col-1,
2021 term.c.y);
2022 break;
2023 case 1: /* left */
2024 tclearregion(0, term.c.y, term.c.x, term.c.y);
2025 break;
2026 case 2: /* all */
2027 tclearregion(0, term.c.y, term.col-1, term.c.y);
2028 break;
2029 }
2030 break;
2031 case 'S': /* SU -- Scroll <n> line up */
2032 DEFAULT(csiescseq.arg[0], 1);
2033 tscrollup(term.top, csiescseq.arg[0]);
2034 break;
2035 case 'T': /* SD -- Scroll <n> line down */
2036 DEFAULT(csiescseq.arg[0], 1);
2037 tscrolldown(term.top, csiescseq.arg[0]);
2038 break;
2039 case 'L': /* IL -- Insert <n> blank lines */
2040 DEFAULT(csiescseq.arg[0], 1);
2041 tinsertblankline(csiescseq.arg[0]);
2042 break;
2043 case 'l': /* RM -- Reset Mode */
2044 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2045 break;
2046 case 'M': /* DL -- Delete <n> lines */
2047 DEFAULT(csiescseq.arg[0], 1);
2048 tdeleteline(csiescseq.arg[0]);
2049 break;
2050 case 'X': /* ECH -- Erase <n> char */
2051 DEFAULT(csiescseq.arg[0], 1);
2052 tclearregion(term.c.x, term.c.y,
2053 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2054 break;
2055 case 'P': /* DCH -- Delete <n> char */
2056 DEFAULT(csiescseq.arg[0], 1);
2057 tdeletechar(csiescseq.arg[0]);
2058 break;
2059 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2060 DEFAULT(csiescseq.arg[0], 1);
2061 tputtab(-csiescseq.arg[0]);
2062 break;
2063 case 'd': /* VPA -- Move to <row> */
2064 DEFAULT(csiescseq.arg[0], 1);
2065 tmoveato(term.c.x, csiescseq.arg[0]-1);
2066 break;
2067 case 'h': /* SM -- Set terminal mode */
2068 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2069 break;
2070 case 'm': /* SGR -- Terminal attribute (color) */
2071 tsetattr(csiescseq.arg, csiescseq.narg);
2072 break;
2073 case 'n': /* DSR – Device Status Report (cursor position) */
2074 if (csiescseq.arg[0] == 6) {
2075 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2076 term.c.y+1, term.c.x+1);
2077 ttywrite(buf, len);
2078 }
2079 break;
2080 case 'r': /* DECSTBM -- Set Scrolling Region */
2081 if(csiescseq.priv) {
2082 goto unknown;
2083 } else {
2084 DEFAULT(csiescseq.arg[0], 1);
2085 DEFAULT(csiescseq.arg[1], term.row);
2086 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2087 tmoveato(0, 0);
2088 }
2089 break;
2090 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2091 tcursor(CURSOR_SAVE);
2092 break;
2093 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2094 tcursor(CURSOR_LOAD);
2095 break;
2096 }
2097 }
2098
2099 void
2100 csidump(void) {
2101 int i;
2102 uint c;
2103
2104 printf("ESC[");
2105 for(i = 0; i < csiescseq.len; i++) {
2106 c = csiescseq.buf[i] & 0xff;
2107 if(isprint(c)) {
2108 putchar(c);
2109 } else if(c == '\n') {
2110 printf("(\\n)");
2111 } else if(c == '\r') {
2112 printf("(\\r)");
2113 } else if(c == 0x1b) {
2114 printf("(\\e)");
2115 } else {
2116 printf("(%02x)", c);
2117 }
2118 }
2119 putchar('\n');
2120 }
2121
2122 void
2123 csireset(void) {
2124 memset(&csiescseq, 0, sizeof(csiescseq));
2125 }
2126
2127 void
2128 strhandle(void) {
2129 char *p = NULL;
2130 int j, narg, par;
2131
2132 term.esc &= ~(ESC_STR_END|ESC_STR);
2133 strparse();
2134 narg = strescseq.narg;
2135 par = atoi(strescseq.args[0]);
2136
2137 switch(strescseq.type) {
2138 case ']': /* OSC -- Operating System Command */
2139 switch(par) {
2140 case 0:
2141 case 1:
2142 case 2:
2143 if(narg > 1)
2144 xsettitle(strescseq.args[1]);
2145 return;
2146 case 4: /* color set */
2147 if(narg < 3)
2148 break;
2149 p = strescseq.args[2];
2150 /* FALLTHROUGH */
2151 case 104: /* color reset, here p = NULL */
2152 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2153 if(xsetcolorname(j, p)) {
2154 fprintf(stderr, "erresc: invalid color %s\n", p);
2155 } else {
2156 /*
2157 * TODO if defaultbg color is changed, borders
2158 * are dirty
2159 */
2160 redraw(0);
2161 }
2162 return;
2163 }
2164 break;
2165 case 'k': /* old title set compatibility */
2166 xsettitle(strescseq.args[0]);
2167 return;
2168 case 'P': /* DCS -- Device Control String */
2169 case '_': /* APC -- Application Program Command */
2170 case '^': /* PM -- Privacy Message */
2171 return;
2172 }
2173
2174 fprintf(stderr, "erresc: unknown str ");
2175 strdump();
2176 }
2177
2178 void
2179 strparse(void) {
2180 char *p = strescseq.buf;
2181
2182 strescseq.narg = 0;
2183 strescseq.buf[strescseq.len] = '\0';
2184 while(p && strescseq.narg < STR_ARG_SIZ)
2185 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2186 }
2187
2188 void
2189 strdump(void) {
2190 int i;
2191 uint c;
2192
2193 printf("ESC%c", strescseq.type);
2194 for(i = 0; i < strescseq.len; i++) {
2195 c = strescseq.buf[i] & 0xff;
2196 if(c == '\0') {
2197 return;
2198 } else if(isprint(c)) {
2199 putchar(c);
2200 } else if(c == '\n') {
2201 printf("(\\n)");
2202 } else if(c == '\r') {
2203 printf("(\\r)");
2204 } else if(c == 0x1b) {
2205 printf("(\\e)");
2206 } else {
2207 printf("(%02x)", c);
2208 }
2209 }
2210 printf("ESC\\\n");
2211 }
2212
2213 void
2214 strreset(void) {
2215 memset(&strescseq, 0, sizeof(strescseq));
2216 }
2217
2218 void
2219 tprinter(char *s, size_t len) {
2220 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2221 fprintf(stderr, "Error writing in %s:%s\n",
2222 opt_io, strerror(errno));
2223 close(iofd);
2224 iofd = -1;
2225 }
2226 }
2227
2228 void
2229 toggleprinter(const Arg *arg) {
2230 term.mode ^= MODE_PRINT;
2231 }
2232
2233 void
2234 printscreen(const Arg *arg) {
2235 tdump();
2236 }
2237
2238 void
2239 printsel(const Arg *arg) {
2240 tdumpsel();
2241 }
2242
2243 void
2244 tdumpsel(void) {
2245 char *ptr;
2246
2247 if((ptr = getsel())) {
2248 tprinter(ptr, strlen(ptr));
2249 free(ptr);
2250 }
2251 }
2252
2253 void
2254 tdumpline(int n) {
2255 Glyph *bp, *end;
2256
2257 bp = &term.line[n][0];
2258 end = &bp[term.col-1];
2259 while(end > bp && !strcmp(" ", end->c))
2260 --end;
2261 if(bp != end || strcmp(bp->c, " ")) {
2262 for( ;bp <= end; ++bp)
2263 tprinter(bp->c, strlen(bp->c));
2264 }
2265 tprinter("\n", 1);
2266 }
2267
2268 void
2269 tdump(void) {
2270 int i;
2271
2272 for(i = 0; i < term.row; ++i)
2273 tdumpline(i);
2274 }
2275
2276 void
2277 tputtab(int n) {
2278 uint x = term.c.x;
2279
2280 if(n > 0) {
2281 while(x < term.col && n--)
2282 for(++x; x < term.col && !term.tabs[x]; ++x)
2283 /* nothing */ ;
2284 } else if(n < 0) {
2285 while(x > 0 && n++)
2286 for(--x; x > 0 && !term.tabs[x]; --x)
2287 /* nothing */ ;
2288 }
2289 tmoveto(x, term.c.y);
2290 }
2291
2292 void
2293 techo(char *buf, int len) {
2294 for(; len > 0; buf++, len--) {
2295 char c = *buf;
2296
2297 if(ISCONTROL(c)) { /* control code */
2298 if(c & 0x80) {
2299 c &= 0x7f;
2300 tputc("^", 1);
2301 tputc("[", 1);
2302 } else if(c != '\n' && c != '\r' && c != '\t') {
2303 c ^= '\x40';
2304 tputc("^", 1);
2305 }
2306 tputc(&c, 1);
2307 } else {
2308 break;
2309 }
2310 }
2311 if(len)
2312 tputc(buf, len);
2313 }
2314
2315 void
2316 tdeftran(char ascii) {
2317 static char cs[] = "0B";
2318 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2319 char *p;
2320
2321 if((p = strchr(cs, ascii)) == NULL) {
2322 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2323 } else {
2324 term.trantbl[term.icharset] = vcs[p - cs];
2325 }
2326 }
2327
2328 void
2329 tcontrolcode(uchar ascii) {
2330 static char question[UTF_SIZ] = "?";
2331
2332 switch(ascii) {
2333 case '\t': /* HT */
2334 tputtab(1);
2335 return;
2336 case '\b': /* BS */
2337 tmoveto(term.c.x-1, term.c.y);
2338 return;
2339 case '\r': /* CR */
2340 tmoveto(0, term.c.y);
2341 return;
2342 case '\f': /* LF */
2343 case '\v': /* VT */
2344 case '\n': /* LF */
2345 /* go to first col if the mode is set */
2346 tnewline(IS_SET(MODE_CRLF));
2347 return;
2348 case '\a': /* BEL */
2349 if(term.esc & ESC_STR_END) {
2350 /* backwards compatibility to xterm */
2351 strhandle();
2352 } else {
2353 if(!(xw.state & WIN_FOCUSED))
2354 xseturgency(1);
2355 if (bellvolume)
2356 XBell(xw.dpy, bellvolume);
2357 }
2358 break;
2359 case '\033': /* ESC */
2360 csireset();
2361 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2362 term.esc |= ESC_START;
2363 return;
2364 case '\016': /* SO */
2365 term.charset = 0;
2366 return;
2367 case '\017': /* SI */
2368 term.charset = 1;
2369 return;
2370 case '\032': /* SUB */
2371 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2372 case '\030': /* CAN */
2373 csireset();
2374 break;
2375 case '\005': /* ENQ (IGNORED) */
2376 case '\000': /* NUL (IGNORED) */
2377 case '\021': /* XON (IGNORED) */
2378 case '\023': /* XOFF (IGNORED) */
2379 case 0177: /* DEL (IGNORED) */
2380 return;
2381 case 0x84: /* TODO: IND */
2382 case 0x85: /* TODO: NEL */
2383 case 0x88: /* TODO: HTS */
2384 case 0x8d: /* TODO: RI */
2385 case 0x8e: /* TODO: SS2 */
2386 case 0x8f: /* TODO: SS3 */
2387 case 0x90: /* TODO: DCS */
2388 case 0x98: /* TODO: SOS */
2389 case 0x9a: /* TODO: DECID */
2390 case 0x9b: /* TODO: CSI */
2391 case 0x9c: /* TODO: ST */
2392 case 0x9d: /* TODO: OSC */
2393 case 0x9e: /* TODO: PM */
2394 case 0x9f: /* TODO: APC */
2395 break;
2396 }
2397 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2398 term.esc &= ~(ESC_STR_END|ESC_STR);
2399 return;
2400 }
2401
2402 void
2403 tdectest(char c) {
2404 static char E[UTF_SIZ] = "E";
2405 int x, y;
2406
2407 if(c == '8') { /* DEC screen alignment test. */
2408 for(x = 0; x < term.col; ++x) {
2409 for(y = 0; y < term.row; ++y)
2410 tsetchar(E, &term.c.attr, x, y);
2411 }
2412 }
2413 }
2414
2415 void
2416 tputc(char *c, int len) {
2417 uchar ascii;
2418 bool control;
2419 long unicodep;
2420 int width;
2421 Glyph *gp;
2422
2423 if(len == 1) {
2424 width = 1;
2425 unicodep = ascii = *c;
2426 } else {
2427 utf8decode(c, &unicodep, UTF_SIZ);
2428 width = wcwidth(unicodep);
2429 control = ISCONTROLC1(unicodep);
2430 ascii = unicodep;
2431 }
2432
2433 if(IS_SET(MODE_PRINT))
2434 tprinter(c, len);
2435 control = ISCONTROL(unicodep);
2436
2437 /*
2438 * STR sequence must be checked before anything else
2439 * because it uses all following characters until it
2440 * receives a ESC, a SUB, a ST or any other C1 control
2441 * character.
2442 */
2443 if(term.esc & ESC_STR) {
2444 if(width == 1 &&
2445 (ascii == '\a' || ascii == 030 ||
2446 ascii == 032 || ascii == 033 ||
2447 ISCONTROLC1(unicodep))) {
2448 term.esc &= ~(ESC_START|ESC_STR);
2449 term.esc |= ESC_STR_END;
2450 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2451 memmove(&strescseq.buf[strescseq.len], c, len);
2452 strescseq.len += len;
2453 return;
2454 } else {
2455 /*
2456 * Here is a bug in terminals. If the user never sends
2457 * some code to stop the str or esc command, then st
2458 * will stop responding. But this is better than
2459 * silently failing with unknown characters. At least
2460 * then users will report back.
2461 *
2462 * In the case users ever get fixed, here is the code:
2463 */
2464 /*
2465 * term.esc = 0;
2466 * strhandle();
2467 */
2468 return;
2469 }
2470 }
2471
2472 /*
2473 * Actions of control codes must be performed as soon they arrive
2474 * because they can be embedded inside a control sequence, and
2475 * they must not cause conflicts with sequences.
2476 */
2477 if(control) {
2478 tcontrolcode(ascii);
2479 /*
2480 * control codes are not shown ever
2481 */
2482 return;
2483 } else if(term.esc & ESC_START) {
2484 if(term.esc & ESC_CSI) {
2485 csiescseq.buf[csiescseq.len++] = ascii;
2486 if(BETWEEN(ascii, 0x40, 0x7E)
2487 || csiescseq.len >= \
2488 sizeof(csiescseq.buf)-1) {
2489 term.esc = 0;
2490 csiparse();
2491 csihandle();
2492 }
2493 return;
2494 } else if(term.esc & ESC_ALTCHARSET) {
2495 tdeftran(ascii);
2496 } else if(term.esc & ESC_TEST) {
2497 tdectest(ascii);
2498 } else {
2499 switch(ascii) {
2500 case '[':
2501 term.esc |= ESC_CSI;
2502 return;
2503 case '#':
2504 term.esc |= ESC_TEST;
2505 return;
2506 case 'P': /* DCS -- Device Control String */
2507 case '_': /* APC -- Application Program Command */
2508 case '^': /* PM -- Privacy Message */
2509 case ']': /* OSC -- Operating System Command */
2510 case 'k': /* old title set compatibility */
2511 strreset();
2512 strescseq.type = ascii;
2513 term.esc |= ESC_STR;
2514 return;
2515 case '(': /* set primary charset G0 */
2516 case ')': /* set secondary charset G1 */
2517 case '*': /* set tertiary charset G2 */
2518 case '+': /* set quaternary charset G3 */
2519 term.icharset = ascii - '(';
2520 term.esc |= ESC_ALTCHARSET;
2521 return;
2522 case 'D': /* IND -- Linefeed */
2523 if(term.c.y == term.bot) {
2524 tscrollup(term.top, 1);
2525 } else {
2526 tmoveto(term.c.x, term.c.y+1);
2527 }
2528 break;
2529 case 'E': /* NEL -- Next line */
2530 tnewline(1); /* always go to first col */
2531 break;
2532 case 'H': /* HTS -- Horizontal tab stop */
2533 term.tabs[term.c.x] = 1;
2534 break;
2535 case 'M': /* RI -- Reverse index */
2536 if(term.c.y == term.top) {
2537 tscrolldown(term.top, 1);
2538 } else {
2539 tmoveto(term.c.x, term.c.y-1);
2540 }
2541 break;
2542 case 'Z': /* DECID -- Identify Terminal */
2543 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2544 break;
2545 case 'c': /* RIS -- Reset to inital state */
2546 treset();
2547 xresettitle();
2548 xloadcols();
2549 break;
2550 case '=': /* DECPAM -- Application keypad */
2551 term.mode |= MODE_APPKEYPAD;
2552 break;
2553 case '>': /* DECPNM -- Normal keypad */
2554 term.mode &= ~MODE_APPKEYPAD;
2555 break;
2556 case '7': /* DECSC -- Save Cursor */
2557 tcursor(CURSOR_SAVE);
2558 break;
2559 case '8': /* DECRC -- Restore Cursor */
2560 tcursor(CURSOR_LOAD);
2561 break;
2562 case '\\': /* ST -- String Terminator */
2563 if(term.esc & ESC_STR_END)
2564 strhandle();
2565 break;
2566 default:
2567 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2568 (uchar) ascii, isprint(ascii)? ascii:'.');
2569 break;
2570 }
2571 }
2572 term.esc = 0;
2573 /*
2574 * All characters which form part of a sequence are not
2575 * printed
2576 */
2577 return;
2578 }
2579 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2580 selclear(NULL);
2581
2582 gp = &term.line[term.c.y][term.c.x];
2583 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2584 gp->mode |= ATTR_WRAP;
2585 tnewline(1);
2586 }
2587
2588 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2589 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2590
2591 if(term.c.x+width > term.col)
2592 tnewline(1);
2593
2594 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2595
2596 if(width == 2) {
2597 gp->mode |= ATTR_WIDE;
2598 if(term.c.x+1 < term.col) {
2599 gp[1].c[0] = '\0';
2600 gp[1].mode = ATTR_WDUMMY;
2601 }
2602 }
2603 if(term.c.x+width < term.col) {
2604 tmoveto(term.c.x+width, term.c.y);
2605 } else {
2606 term.c.state |= CURSOR_WRAPNEXT;
2607 }
2608 }
2609
2610 int
2611 tresize(int col, int row) {
2612 int i;
2613 int minrow = MIN(row, term.row);
2614 int mincol = MIN(col, term.col);
2615 int slide = term.c.y - row + 1;
2616 bool *bp;
2617 Line *orig;
2618 TCursor c;
2619
2620 if(col < 1 || row < 1)
2621 return 0;
2622
2623 /* free unneeded rows */
2624 i = 0;
2625 if(slide > 0) {
2626 /*
2627 * slide screen to keep cursor where we expect it -
2628 * tscrollup would work here, but we can optimize to
2629 * memmove because we're freeing the earlier lines
2630 */
2631 for(/* i = 0 */; i < slide; i++) {
2632 free(term.line[i]);
2633 free(term.alt[i]);
2634 }
2635 memmove(term.line, term.line + slide, row * sizeof(Line));
2636 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2637 }
2638 for(i += row; i < term.row; i++) {
2639 free(term.line[i]);
2640 free(term.alt[i]);
2641 }
2642
2643 /* resize to new height */
2644 term.line = xrealloc(term.line, row * sizeof(Line));
2645 term.alt = xrealloc(term.alt, row * sizeof(Line));
2646 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2647 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2648
2649 /* resize each row to new width, zero-pad if needed */
2650 for(i = 0; i < minrow; i++) {
2651 term.dirty[i] = 1;
2652 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2653 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2654 }
2655
2656 /* allocate any new rows */
2657 for(/* i == minrow */; i < row; i++) {
2658 term.dirty[i] = 1;
2659 term.line[i] = xmalloc(col * sizeof(Glyph));
2660 term.alt[i] = xmalloc(col * sizeof(Glyph));
2661 }
2662 if(col > term.col) {
2663 bp = term.tabs + term.col;
2664
2665 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2666 while(--bp > term.tabs && !*bp)
2667 /* nothing */ ;
2668 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2669 *bp = 1;
2670 }
2671 /* update terminal size */
2672 term.col = col;
2673 term.row = row;
2674 /* reset scrolling region */
2675 tsetscroll(0, row-1);
2676 /* make use of the LIMIT in tmoveto */
2677 tmoveto(term.c.x, term.c.y);
2678 /* Clearing both screens */
2679 orig = term.line;
2680 c = term.c;
2681 do {
2682 if(mincol < col && 0 < minrow) {
2683 tclearregion(mincol, 0, col - 1, minrow - 1);
2684 }
2685 if(0 < col && minrow < row) {
2686 tclearregion(0, minrow, col - 1, row - 1);
2687 }
2688 tswapscreen();
2689 tcursor(CURSOR_LOAD);
2690 } while(orig != term.line);
2691 term.c = c;
2692
2693 return (slide > 0);
2694 }
2695
2696 void
2697 xresize(int col, int row) {
2698 xw.tw = MAX(1, col * xw.cw);
2699 xw.th = MAX(1, row * xw.ch);
2700
2701 XFreePixmap(xw.dpy, xw.buf);
2702 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2703 DefaultDepth(xw.dpy, xw.scr));
2704 XftDrawChange(xw.draw, xw.buf);
2705 xclear(0, 0, xw.w, xw.h);
2706 }
2707
2708 static inline ushort
2709 sixd_to_16bit(int x) {
2710 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2711 }
2712
2713 void
2714 xloadcols(void) {
2715 int i;
2716 XRenderColor color = { .alpha = 0xffff };
2717 static bool loaded;
2718 Color *cp;
2719
2720 if(loaded) {
2721 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2722 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2723 }
2724
2725 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2726 for(i = 0; i < LEN(colorname); i++) {
2727 if(!colorname[i])
2728 continue;
2729 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2730 die("Could not allocate color '%s'\n", colorname[i]);
2731 }
2732 }
2733
2734 /* load colors [16-231] ; same colors as xterm */
2735 for(i = 16; i < 6*6*6+16; i++) {
2736 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2737 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2738 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2739 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2740 die("Could not allocate color %d\n", i);
2741 }
2742
2743 /* load colors [232-255] ; grayscale */
2744 for(; i < 256; i++) {
2745 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2746 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2747 die("Could not allocate color %d\n", i);
2748 }
2749 loaded = true;
2750 }
2751
2752 int
2753 xsetcolorname(int x, const char *name) {
2754 XRenderColor color = { .alpha = 0xffff };
2755 Color ncolor;
2756
2757 if(!BETWEEN(x, 0, LEN(colorname)))
2758 return 1;
2759
2760 if(!name) {
2761 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2762 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2763 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2764 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2765 if(!XftColorAllocValue(xw.dpy, xw.vis,
2766 xw.cmap, &color, &ncolor)) {
2767 return 1;
2768 }
2769
2770 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2771 dc.col[x] = ncolor;
2772 return 0;
2773 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2774 color.red = color.green = color.blue = \
2775 0x0808 + 0x0a0a * (x - (16 + 216));
2776 if(!XftColorAllocValue(xw.dpy, xw.vis,
2777 xw.cmap, &color, &ncolor)) {
2778 return 1;
2779 }
2780
2781 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2782 dc.col[x] = ncolor;
2783 return 0;
2784 } else { /* system colors */
2785 name = colorname[x];
2786 }
2787 }
2788 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2789 return 1;
2790
2791 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2792 dc.col[x] = ncolor;
2793 return 0;
2794 }
2795
2796 void
2797 xtermclear(int col1, int row1, int col2, int row2) {
2798 XftDrawRect(xw.draw,
2799 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2800 borderpx + col1 * xw.cw,
2801 borderpx + row1 * xw.ch,
2802 (col2-col1+1) * xw.cw,
2803 (row2-row1+1) * xw.ch);
2804 }
2805
2806 /*
2807 * Absolute coordinates.
2808 */
2809 void
2810 xclear(int x1, int y1, int x2, int y2) {
2811 XftDrawRect(xw.draw,
2812 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2813 x1, y1, x2-x1, y2-y1);
2814 }
2815
2816 void
2817 xhints(void) {
2818 XClassHint class = {opt_class ? opt_class : termname, termname};
2819 XWMHints wm = {.flags = InputHint, .input = 1};
2820 XSizeHints *sizeh = NULL;
2821
2822 sizeh = XAllocSizeHints();
2823
2824 sizeh->flags = PSize | PResizeInc | PBaseSize;
2825 sizeh->height = xw.h;
2826 sizeh->width = xw.w;
2827 sizeh->height_inc = xw.ch;
2828 sizeh->width_inc = xw.cw;
2829 sizeh->base_height = 2 * borderpx;
2830 sizeh->base_width = 2 * borderpx;
2831 if(xw.isfixed == True) {
2832 sizeh->flags |= PMaxSize | PMinSize;
2833 sizeh->min_width = sizeh->max_width = xw.w;
2834 sizeh->min_height = sizeh->max_height = xw.h;
2835 }
2836 if(xw.gm & (XValue|YValue)) {
2837 sizeh->flags |= USPosition | PWinGravity;
2838 sizeh->x = xw.l;
2839 sizeh->y = xw.t;
2840 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2841 }
2842
2843 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2844 &class);
2845 XFree(sizeh);
2846 }
2847
2848 int
2849 xgeommasktogravity(int mask) {
2850 switch(mask & (XNegative|YNegative)) {
2851 case 0:
2852 return NorthWestGravity;
2853 case XNegative:
2854 return NorthEastGravity;
2855 case YNegative:
2856 return SouthWestGravity;
2857 }
2858 return SouthEastGravity;
2859 }
2860
2861 int
2862 xloadfont(Font *f, FcPattern *pattern) {
2863 FcPattern *match;
2864 FcResult result;
2865
2866 match = FcFontMatch(NULL, pattern, &result);
2867 if(!match)
2868 return 1;
2869
2870 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2871 FcPatternDestroy(match);
2872 return 1;
2873 }
2874
2875 f->set = NULL;
2876 f->pattern = FcPatternDuplicate(pattern);
2877
2878 f->ascent = f->match->ascent;
2879 f->descent = f->match->descent;
2880 f->lbearing = 0;
2881 f->rbearing = f->match->max_advance_width;
2882
2883 f->height = f->ascent + f->descent;
2884 f->width = f->lbearing + f->rbearing;
2885
2886 return 0;
2887 }
2888
2889 void
2890 xloadfonts(char *fontstr, double fontsize) {
2891 FcPattern *pattern;
2892 FcResult r_sz, r_psz;
2893 double fontval;
2894 float ceilf(float);
2895
2896 if(fontstr[0] == '-') {
2897 pattern = XftXlfdParse(fontstr, False, False);
2898 } else {
2899 pattern = FcNameParse((FcChar8 *)fontstr);
2900 }
2901
2902 if(!pattern)
2903 die("st: can't open font %s\n", fontstr);
2904
2905 if(fontsize > 0) {
2906 FcPatternDel(pattern, FC_PIXEL_SIZE);
2907 FcPatternDel(pattern, FC_SIZE);
2908 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2909 usedfontsize = fontsize;
2910 } else {
2911 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2912 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2913 if(r_psz == FcResultMatch) {
2914 usedfontsize = fontval;
2915 } else if(r_sz == FcResultMatch) {
2916 usedfontsize = -1;
2917 } else {
2918 /*
2919 * Default font size is 12, if none given. This is to
2920 * have a known usedfontsize value.
2921 */
2922 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2923 usedfontsize = 12;
2924 }
2925 }
2926
2927 FcConfigSubstitute(0, pattern, FcMatchPattern);
2928 FcDefaultSubstitute(pattern);
2929
2930 if(xloadfont(&dc.font, pattern))
2931 die("st: can't open font %s\n", fontstr);
2932
2933 if(usedfontsize < 0) {
2934 FcPatternGetDouble(dc.font.match->pattern,
2935 FC_PIXEL_SIZE, 0, &fontval);
2936 usedfontsize = fontval;
2937 }
2938
2939 /* Setting character width and height. */
2940 xw.cw = ceilf(dc.font.width * cwscale);
2941 xw.ch = ceilf(dc.font.height * chscale);
2942
2943 FcPatternDel(pattern, FC_SLANT);
2944 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2945 if(xloadfont(&dc.ifont, pattern))
2946 die("st: can't open font %s\n", fontstr);
2947
2948 FcPatternDel(pattern, FC_WEIGHT);
2949 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2950 if(xloadfont(&dc.ibfont, pattern))
2951 die("st: can't open font %s\n", fontstr);
2952
2953 FcPatternDel(pattern, FC_SLANT);
2954 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2955 if(xloadfont(&dc.bfont, pattern))
2956 die("st: can't open font %s\n", fontstr);
2957
2958 FcPatternDestroy(pattern);
2959 }
2960
2961 int
2962 xloadfontset(Font *f) {
2963 FcResult result;
2964
2965 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2966 return 1;
2967 return 0;
2968 }
2969
2970 void
2971 xunloadfont(Font *f) {
2972 XftFontClose(xw.dpy, f->match);
2973 FcPatternDestroy(f->pattern);
2974 if(f->set)
2975 FcFontSetDestroy(f->set);
2976 }
2977
2978 void
2979 xunloadfonts(void) {
2980 /* Free the loaded fonts in the font cache. */
2981 while(frclen > 0)
2982 XftFontClose(xw.dpy, frc[--frclen].font);
2983
2984 xunloadfont(&dc.font);
2985 xunloadfont(&dc.bfont);
2986 xunloadfont(&dc.ifont);
2987 xunloadfont(&dc.ibfont);
2988 }
2989
2990 void
2991 xzoom(const Arg *arg) {
2992 xunloadfonts();
2993 xloadfonts(usedfont, usedfontsize + arg->i);
2994 cresize(0, 0);
2995 redraw(0);
2996 xhints();
2997 }
2998
2999 void
3000 xinit(void) {
3001 XGCValues gcvalues;
3002 Cursor cursor;
3003 Window parent;
3004 pid_t thispid = getpid();
3005
3006 if(!(xw.dpy = XOpenDisplay(NULL)))
3007 die("Can't open display\n");
3008 xw.scr = XDefaultScreen(xw.dpy);
3009 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3010
3011 /* font */
3012 if(!FcInit())
3013 die("Could not init fontconfig.\n");
3014
3015 usedfont = (opt_font == NULL)? font : opt_font;
3016 xloadfonts(usedfont, 0);
3017
3018 /* colors */
3019 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3020 xloadcols();
3021
3022 /* adjust fixed window geometry */
3023 xw.w = 2 * borderpx + term.col * xw.cw;
3024 xw.h = 2 * borderpx + term.row * xw.ch;
3025 if(xw.gm & XNegative)
3026 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3027 if(xw.gm & YNegative)
3028 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3029
3030 /* Events */
3031 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3032 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3033 xw.attrs.bit_gravity = NorthWestGravity;
3034 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3035 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3036 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3037 xw.attrs.colormap = xw.cmap;
3038
3039 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3040 XRootWindow(xw.dpy, xw.scr);
3041 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3042 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3043 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3044 | CWEventMask | CWColormap, &xw.attrs);
3045
3046 memset(&gcvalues, 0, sizeof(gcvalues));
3047 gcvalues.graphics_exposures = False;
3048 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3049 &gcvalues);
3050 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3051 DefaultDepth(xw.dpy, xw.scr));
3052 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3053 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3054
3055 /* Xft rendering context */
3056 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3057
3058 /* input methods */
3059 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3060 XSetLocaleModifiers("@im=local");
3061 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3062 XSetLocaleModifiers("@im=");
3063 if((xw.xim = XOpenIM(xw.dpy,
3064 NULL, NULL, NULL)) == NULL) {
3065 die("XOpenIM failed. Could not open input"
3066 " device.\n");
3067 }
3068 }
3069 }
3070 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3071 | XIMStatusNothing, XNClientWindow, xw.win,
3072 XNFocusWindow, xw.win, NULL);
3073 if(xw.xic == NULL)
3074 die("XCreateIC failed. Could not obtain input method.\n");
3075
3076 /* white cursor, black outline */
3077 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3078 XDefineCursor(xw.dpy, xw.win, cursor);
3079 XRecolorCursor(xw.dpy, cursor,
3080 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3081 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3082
3083 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3084 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3085 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3086 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3087
3088 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3089 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3090 PropModeReplace, (uchar *)&thispid, 1);
3091
3092 xresettitle();
3093 XMapWindow(xw.dpy, xw.win);
3094 xhints();
3095 XSync(xw.dpy, False);
3096 }
3097
3098 void
3099 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3100 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3101 width = charlen * xw.cw, xp, i;
3102 int frcflags;
3103 int u8fl, u8fblen, u8cblen, doesexist;
3104 char *u8c, *u8fs;
3105 long unicodep;
3106 Font *font = &dc.font;
3107 FcResult fcres;
3108 FcPattern *fcpattern, *fontpattern;
3109 FcFontSet *fcsets[] = { NULL };
3110 FcCharSet *fccharset;
3111 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3112 XRenderColor colfg, colbg;
3113 XRectangle r;
3114 int oneatatime;
3115
3116 frcflags = FRC_NORMAL;
3117
3118 if(base.mode & ATTR_ITALIC) {
3119 if(base.fg == defaultfg)
3120 base.fg = defaultitalic;
3121 font = &dc.ifont;
3122 frcflags = FRC_ITALIC;
3123 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3124 if(base.fg == defaultfg)
3125 base.fg = defaultitalic;
3126 font = &dc.ibfont;
3127 frcflags = FRC_ITALICBOLD;
3128 } else if(base.mode & ATTR_UNDERLINE) {
3129 if(base.fg == defaultfg)
3130 base.fg = defaultunderline;
3131 }
3132
3133 if(IS_TRUECOL(base.fg)) {
3134 colfg.alpha = 0xffff;
3135 colfg.red = TRUERED(base.fg);
3136 colfg.green = TRUEGREEN(base.fg);
3137 colfg.blue = TRUEBLUE(base.fg);
3138 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3139 fg = &truefg;
3140 } else {
3141 fg = &dc.col[base.fg];
3142 }
3143
3144 if(IS_TRUECOL(base.bg)) {
3145 colbg.alpha = 0xffff;
3146 colbg.green = TRUEGREEN(base.bg);
3147 colbg.red = TRUERED(base.bg);
3148 colbg.blue = TRUEBLUE(base.bg);
3149 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3150 bg = &truebg;
3151 } else {
3152 bg = &dc.col[base.bg];
3153 }
3154
3155 if(base.mode & ATTR_BOLD) {
3156 /*
3157 * change basic system colors [0-7]
3158 * to bright system colors [8-15]
3159 */
3160 if(BETWEEN(base.fg, 0, 7))
3161 fg = &dc.col[base.fg + 8];
3162
3163 if(base.mode & ATTR_ITALIC) {
3164 font = &dc.ibfont;
3165 frcflags = FRC_ITALICBOLD;
3166 } else {
3167 font = &dc.bfont;
3168 frcflags = FRC_BOLD;
3169 }
3170 }
3171
3172 if(IS_SET(MODE_REVERSE)) {
3173 if(fg == &dc.col[defaultfg]) {
3174 fg = &dc.col[defaultbg];
3175 } else {
3176 colfg.red = ~fg->color.red;
3177 colfg.green = ~fg->color.green;
3178 colfg.blue = ~fg->color.blue;
3179 colfg.alpha = fg->color.alpha;
3180 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3181 &revfg);
3182 fg = &revfg;
3183 }
3184
3185 if(bg == &dc.col[defaultbg]) {
3186 bg = &dc.col[defaultfg];
3187 } else {
3188 colbg.red = ~bg->color.red;
3189 colbg.green = ~bg->color.green;
3190 colbg.blue = ~bg->color.blue;
3191 colbg.alpha = bg->color.alpha;
3192 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3193 &revbg);
3194 bg = &revbg;
3195 }
3196 }
3197
3198 if(base.mode & ATTR_REVERSE) {
3199 temp = fg;
3200 fg = bg;
3201 bg = temp;
3202 }
3203
3204 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3205 fg = bg;
3206
3207 /* Intelligent cleaning up of the borders. */
3208 if(x == 0) {
3209 xclear(0, (y == 0)? 0 : winy, borderpx,
3210 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3211 }
3212 if(x + charlen >= term.col) {
3213 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3214 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3215 }
3216 if(y == 0)
3217 xclear(winx, 0, winx + width, borderpx);
3218 if(y == term.row-1)
3219 xclear(winx, winy + xw.ch, winx + width, xw.h);
3220
3221 /* Clean up the region we want to draw to. */
3222 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3223
3224 /* Set the clip region because Xft is sometimes dirty. */
3225 r.x = 0;
3226 r.y = 0;
3227 r.height = xw.ch;
3228 r.width = width;
3229 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3230
3231 for(xp = winx; bytelen > 0;) {
3232 /*
3233 * Search for the range in the to be printed string of glyphs
3234 * that are in the main font. Then print that range. If
3235 * some glyph is found that is not in the font, do the
3236 * fallback dance.
3237 */
3238 u8fs = s;
3239 u8fblen = 0;
3240 u8fl = 0;
3241 oneatatime = font->width != xw.cw;
3242 for(;;) {
3243 u8c = s;
3244 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3245 s += u8cblen;
3246 bytelen -= u8cblen;
3247
3248 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3249 if(doesexist) {
3250 u8fl++;
3251 u8fblen += u8cblen;
3252 if(!oneatatime && bytelen > 0)
3253 continue;
3254 }
3255
3256 if(u8fl > 0) {
3257 XftDrawStringUtf8(xw.draw, fg,
3258 font->match, xp,
3259 winy + font->ascent,
3260 (FcChar8 *)u8fs,
3261 u8fblen);
3262 xp += xw.cw * u8fl;
3263 }
3264 break;
3265 }
3266 if(doesexist) {
3267 if(oneatatime)
3268 continue;
3269 break;
3270 }
3271
3272 /* Search the font cache. */
3273 for(i = 0; i < frclen; i++) {
3274 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3275 && frc[i].flags == frcflags) {
3276 break;
3277 }
3278 }
3279
3280 /* Nothing was found. */
3281 if(i >= frclen) {
3282 if(!font->set)
3283 xloadfontset(font);
3284 fcsets[0] = font->set;
3285
3286 /*
3287 * Nothing was found in the cache. Now use
3288 * some dozen of Fontconfig calls to get the
3289 * font for one single character.
3290 *
3291 * Xft and fontconfig are design failures.
3292 */
3293 fcpattern = FcPatternDuplicate(font->pattern);
3294 fccharset = FcCharSetCreate();
3295
3296 FcCharSetAddChar(fccharset, unicodep);
3297 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3298 fccharset);
3299 FcPatternAddBool(fcpattern, FC_SCALABLE,
3300 FcTrue);
3301
3302 FcConfigSubstitute(0, fcpattern,
3303 FcMatchPattern);
3304 FcDefaultSubstitute(fcpattern);
3305
3306 fontpattern = FcFontSetMatch(0, fcsets,
3307 FcTrue, fcpattern, &fcres);
3308
3309 /*
3310 * Overwrite or create the new cache entry.
3311 */
3312 if(frclen >= LEN(frc)) {
3313 frclen = LEN(frc) - 1;
3314 XftFontClose(xw.dpy, frc[frclen].font);
3315 }
3316
3317 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3318 fontpattern);
3319 frc[frclen].flags = frcflags;
3320
3321 i = frclen;
3322 frclen++;
3323
3324 FcPatternDestroy(fcpattern);
3325 FcCharSetDestroy(fccharset);
3326 }
3327
3328 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3329 xp, winy + frc[i].font->ascent,
3330 (FcChar8 *)u8c, u8cblen);
3331
3332 xp += xw.cw * wcwidth(unicodep);
3333 }
3334
3335 /*
3336 * This is how the loop above actually should be. Why does the
3337 * application have to care about font details?
3338 *
3339 * I have to repeat: Xft and Fontconfig are design failures.
3340 */
3341 /*
3342 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3343 winy + font->ascent, (FcChar8 *)s, bytelen);
3344 */
3345
3346 if(base.mode & ATTR_UNDERLINE) {
3347 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3348 width, 1);
3349 }
3350
3351 /* Reset clip to none. */
3352 XftDrawSetClip(xw.draw, 0);
3353 }
3354
3355 void
3356 xdrawcursor(void) {
3357 static int oldx = 0, oldy = 0;
3358 int sl, width, curx;
3359 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3360
3361 LIMIT(oldx, 0, term.col-1);
3362 LIMIT(oldy, 0, term.row-1);
3363
3364 curx = term.c.x;
3365
3366 /* adjust position if in dummy */
3367 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3368 oldx--;
3369 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3370 curx--;
3371
3372 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3373
3374 /* remove the old cursor */
3375 sl = utf8len(term.line[oldy][oldx].c);
3376 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3377 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3378 oldy, width, sl);
3379
3380 /* draw the new one */
3381 if(!(IS_SET(MODE_HIDE))) {
3382 if(xw.state & WIN_FOCUSED) {
3383 if(IS_SET(MODE_REVERSE)) {
3384 g.mode |= ATTR_REVERSE;
3385 g.fg = defaultcs;
3386 g.bg = defaultfg;
3387 }
3388
3389 sl = utf8len(g.c);
3390 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3391 ? 2 : 1;
3392 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3393 } else {
3394 XftDrawRect(xw.draw, &dc.col[defaultcs],
3395 borderpx + curx * xw.cw,
3396 borderpx + term.c.y * xw.ch,
3397 xw.cw - 1, 1);
3398 XftDrawRect(xw.draw, &dc.col[defaultcs],
3399 borderpx + curx * xw.cw,
3400 borderpx + term.c.y * xw.ch,
3401 1, xw.ch - 1);
3402 XftDrawRect(xw.draw, &dc.col[defaultcs],
3403 borderpx + (curx + 1) * xw.cw - 1,
3404 borderpx + term.c.y * xw.ch,
3405 1, xw.ch - 1);
3406 XftDrawRect(xw.draw, &dc.col[defaultcs],
3407 borderpx + curx * xw.cw,
3408 borderpx + (term.c.y + 1) * xw.ch - 1,
3409 xw.cw, 1);
3410 }
3411 oldx = curx, oldy = term.c.y;
3412 }
3413 }
3414
3415
3416 void
3417 xsettitle(char *p) {
3418 XTextProperty prop;
3419
3420 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3421 &prop);
3422 XSetWMName(xw.dpy, xw.win, &prop);
3423 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3424 XFree(prop.value);
3425 }
3426
3427 void
3428 xresettitle(void) {
3429 xsettitle(opt_title ? opt_title : "st");
3430 }
3431
3432 void
3433 redraw(int timeout) {
3434 struct timespec tv = {0, timeout * 1000};
3435
3436 tfulldirt();
3437 draw();
3438
3439 if(timeout > 0) {
3440 nanosleep(&tv, NULL);
3441 XSync(xw.dpy, False); /* necessary for a good tput flash */
3442 }
3443 }
3444
3445 void
3446 draw(void) {
3447 drawregion(0, 0, term.col, term.row);
3448 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3449 xw.h, 0, 0);
3450 XSetForeground(xw.dpy, dc.gc,
3451 dc.col[IS_SET(MODE_REVERSE)?
3452 defaultfg : defaultbg].pixel);
3453 }
3454
3455 void
3456 drawregion(int x1, int y1, int x2, int y2) {
3457 int ic, ib, x, y, ox, sl;
3458 Glyph base, new;
3459 char buf[DRAW_BUF_SIZ];
3460 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3461 long unicodep;
3462
3463 if(!(xw.state & WIN_VISIBLE))
3464 return;
3465
3466 for(y = y1; y < y2; y++) {
3467 if(!term.dirty[y])
3468 continue;
3469
3470 xtermclear(0, y, term.col, y);
3471 term.dirty[y] = 0;
3472 base = term.line[y][0];
3473 ic = ib = ox = 0;
3474 for(x = x1; x < x2; x++) {
3475 new = term.line[y][x];
3476 if(new.mode == ATTR_WDUMMY)
3477 continue;
3478 if(ena_sel && selected(x, y))
3479 new.mode ^= ATTR_REVERSE;
3480 if(ib > 0 && (ATTRCMP(base, new)
3481 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3482 xdraws(buf, base, ox, y, ic, ib);
3483 ic = ib = 0;
3484 }
3485 if(ib == 0) {
3486 ox = x;
3487 base = new;
3488 }
3489
3490 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3491 memcpy(buf+ib, new.c, sl);
3492 ib += sl;
3493 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3494 }
3495 if(ib > 0)
3496 xdraws(buf, base, ox, y, ic, ib);
3497 }
3498 xdrawcursor();
3499 }
3500
3501 void
3502 expose(XEvent *ev) {
3503 XExposeEvent *e = &ev->xexpose;
3504
3505 if(xw.state & WIN_REDRAW) {
3506 if(!e->count)
3507 xw.state &= ~WIN_REDRAW;
3508 }
3509 redraw(0);
3510 }
3511
3512 void
3513 visibility(XEvent *ev) {
3514 XVisibilityEvent *e = &ev->xvisibility;
3515
3516 if(e->state == VisibilityFullyObscured) {
3517 xw.state &= ~WIN_VISIBLE;
3518 } else if(!(xw.state & WIN_VISIBLE)) {
3519 /* need a full redraw for next Expose, not just a buf copy */
3520 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3521 }
3522 }
3523
3524 void
3525 unmap(XEvent *ev) {
3526 xw.state &= ~WIN_VISIBLE;
3527 }
3528
3529 void
3530 xsetpointermotion(int set) {
3531 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3532 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3533 }
3534
3535 void
3536 xseturgency(int add) {
3537 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3538
3539 MODBIT(h->flags, add, XUrgencyHint);
3540 XSetWMHints(xw.dpy, xw.win, h);
3541 XFree(h);
3542 }
3543
3544 void
3545 focus(XEvent *ev) {
3546 XFocusChangeEvent *e = &ev->xfocus;
3547
3548 if(e->mode == NotifyGrab)
3549 return;
3550
3551 if(ev->type == FocusIn) {
3552 XSetICFocus(xw.xic);
3553 xw.state |= WIN_FOCUSED;
3554 xseturgency(0);
3555 if(IS_SET(MODE_FOCUS))
3556 ttywrite("\033[I", 3);
3557 } else {
3558 XUnsetICFocus(xw.xic);
3559 xw.state &= ~WIN_FOCUSED;
3560 if(IS_SET(MODE_FOCUS))
3561 ttywrite("\033[O", 3);
3562 }
3563 }
3564
3565 static inline bool
3566 match(uint mask, uint state) {
3567 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3568 }
3569
3570 void
3571 numlock(const Arg *dummy) {
3572 term.numlock ^= 1;
3573 }
3574
3575 char*
3576 kmap(KeySym k, uint state) {
3577 Key *kp;
3578 int i;
3579
3580 /* Check for mapped keys out of X11 function keys. */
3581 for(i = 0; i < LEN(mappedkeys); i++) {
3582 if(mappedkeys[i] == k)
3583 break;
3584 }
3585 if(i == LEN(mappedkeys)) {
3586 if((k & 0xFFFF) < 0xFD00)
3587 return NULL;
3588 }
3589
3590 for(kp = key; kp < key + LEN(key); kp++) {
3591 if(kp->k != k)
3592 continue;
3593
3594 if(!match(kp->mask, state))
3595 continue;
3596
3597 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3598 continue;
3599 if(term.numlock && kp->appkey == 2)
3600 continue;
3601
3602 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3603 continue;
3604
3605 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3606 continue;
3607
3608 return kp->s;
3609 }
3610
3611 return NULL;
3612 }
3613
3614 void
3615 kpress(XEvent *ev) {
3616 XKeyEvent *e = &ev->xkey;
3617 KeySym ksym;
3618 char buf[32], *customkey;
3619 int len;
3620 long c;
3621 Status status;
3622 Shortcut *bp;
3623
3624 if(IS_SET(MODE_KBDLOCK))
3625 return;
3626
3627 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3628 /* 1. shortcuts */
3629 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3630 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3631 bp->func(&(bp->arg));
3632 return;
3633 }
3634 }
3635
3636 /* 2. custom keys from config.h */
3637 if((customkey = kmap(ksym, e->state))) {
3638 ttysend(customkey, strlen(customkey));
3639 return;
3640 }
3641
3642 /* 3. composed string from input method */
3643 if(len == 0)
3644 return;
3645 if(len == 1 && e->state & Mod1Mask) {
3646 if(IS_SET(MODE_8BIT)) {
3647 if(*buf < 0177) {
3648 c = *buf | 0x80;
3649 len = utf8encode(c, buf, UTF_SIZ);
3650 }
3651 } else {
3652 buf[1] = buf[0];
3653 buf[0] = '\033';
3654 len = 2;
3655 }
3656 }
3657 ttysend(buf, len);
3658 }
3659
3660
3661 void
3662 cmessage(XEvent *e) {
3663 /*
3664 * See xembed specs
3665 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3666 */
3667 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3668 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3669 xw.state |= WIN_FOCUSED;
3670 xseturgency(0);
3671 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3672 xw.state &= ~WIN_FOCUSED;
3673 }
3674 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3675 /* Send SIGHUP to shell */
3676 kill(pid, SIGHUP);
3677 exit(EXIT_SUCCESS);
3678 }
3679 }
3680
3681 void
3682 cresize(int width, int height) {
3683 int col, row;
3684
3685 if(width != 0)
3686 xw.w = width;
3687 if(height != 0)
3688 xw.h = height;
3689
3690 col = (xw.w - 2 * borderpx) / xw.cw;
3691 row = (xw.h - 2 * borderpx) / xw.ch;
3692
3693 tresize(col, row);
3694 xresize(col, row);
3695 ttyresize();
3696 }
3697
3698 void
3699 resize(XEvent *e) {
3700 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3701 return;
3702
3703 cresize(e->xconfigure.width, e->xconfigure.height);
3704 }
3705
3706 void
3707 run(void) {
3708 XEvent ev;
3709 int w = xw.w, h = xw.h;
3710 fd_set rfd;
3711 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3712 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3713 long deltatime;
3714
3715 /* Waiting for window mapping */
3716 while(1) {
3717 XNextEvent(xw.dpy, &ev);
3718 if(ev.type == ConfigureNotify) {
3719 w = ev.xconfigure.width;
3720 h = ev.xconfigure.height;
3721 } else if(ev.type == MapNotify) {
3722 break;
3723 }
3724 }
3725
3726 ttynew();
3727 cresize(w, h);
3728
3729 clock_gettime(CLOCK_MONOTONIC, &last);
3730 lastblink = last;
3731
3732 for(xev = actionfps;;) {
3733 FD_ZERO(&rfd);
3734 FD_SET(cmdfd, &rfd);
3735 FD_SET(xfd, &rfd);
3736
3737 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3738 if(errno == EINTR)
3739 continue;
3740 die("select failed: %s\n", strerror(errno));
3741 }
3742 if(FD_ISSET(cmdfd, &rfd)) {
3743 ttyread();
3744 if(blinktimeout) {
3745 blinkset = tattrset(ATTR_BLINK);
3746 if(!blinkset)
3747 MODBIT(term.mode, 0, MODE_BLINK);
3748 }
3749 }
3750
3751 if(FD_ISSET(xfd, &rfd))
3752 xev = actionfps;
3753
3754 clock_gettime(CLOCK_MONOTONIC, &now);
3755 drawtimeout.tv_sec = 0;
3756 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3757 tv = &drawtimeout;
3758
3759 dodraw = 0;
3760 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3761 tsetdirtattr(ATTR_BLINK);
3762 term.mode ^= MODE_BLINK;
3763 lastblink = now;
3764 dodraw = 1;
3765 }
3766 deltatime = TIMEDIFF(now, last);
3767 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3768 || deltatime < 0) {
3769 dodraw = 1;
3770 last = now;
3771 }
3772
3773 if(dodraw) {
3774 while(XPending(xw.dpy)) {
3775 XNextEvent(xw.dpy, &ev);
3776 if(XFilterEvent(&ev, None))
3777 continue;
3778 if(handler[ev.type])
3779 (handler[ev.type])(&ev);
3780 }
3781
3782 draw();
3783 XFlush(xw.dpy);
3784
3785 if(xev && !FD_ISSET(xfd, &rfd))
3786 xev--;
3787 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3788 if(blinkset) {
3789 if(TIMEDIFF(now, lastblink) \
3790 > blinktimeout) {
3791 drawtimeout.tv_nsec = 1000;
3792 } else {
3793 drawtimeout.tv_nsec = (1E6 * \
3794 (blinktimeout - \
3795 TIMEDIFF(now,
3796 lastblink)));
3797 }
3798 } else {
3799 tv = NULL;
3800 }
3801 }
3802 }
3803 }
3804 }
3805
3806 void
3807 usage(void) {
3808 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3809 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3810 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3811 }
3812
3813 int
3814 main(int argc, char *argv[]) {
3815 char *titles;
3816 uint cols = 80, rows = 24;
3817
3818 xw.l = xw.t = 0;
3819 xw.isfixed = False;
3820
3821 ARGBEGIN {
3822 case 'a':
3823 allowaltscreen = false;
3824 break;
3825 case 'c':
3826 opt_class = EARGF(usage());
3827 break;
3828 case 'e':
3829 /* eat all remaining arguments */
3830 if(argc > 1) {
3831 opt_cmd = &argv[1];
3832 if(argv[1] != NULL && opt_title == NULL) {
3833 titles = xstrdup(argv[1]);
3834 opt_title = basename(titles);
3835 }
3836 }
3837 goto run;
3838 case 'f':
3839 opt_font = EARGF(usage());
3840 break;
3841 case 'g':
3842 xw.gm = XParseGeometry(EARGF(usage()),
3843 &xw.l, &xw.t, &cols, &rows);
3844 break;
3845 case 'i':
3846 xw.isfixed = True;
3847 break;
3848 case 'o':
3849 opt_io = EARGF(usage());
3850 break;
3851 case 't':
3852 opt_title = EARGF(usage());
3853 break;
3854 case 'w':
3855 opt_embed = EARGF(usage());
3856 break;
3857 case 'v':
3858 default:
3859 usage();
3860 } ARGEND;
3861
3862 run:
3863 setlocale(LC_CTYPE, "");
3864 XSetLocaleModifiers("");
3865 tnew(cols? cols : 1, rows? rows : 1);
3866 xinit();
3867 selinit();
3868 run();
3869
3870 return 0;
3871 }
3872