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Refactor xsetcolorname()
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a)[0])
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f))
74 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
75 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
80 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
81 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
82
83 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
84 #define IS_TRUECOL(x) (1 << 24 & (x))
85 #define TRUERED(x) (((x) & 0xff0000) >> 8)
86 #define TRUEGREEN(x) (((x) & 0xff00))
87 #define TRUEBLUE(x) (((x) & 0xff) << 8)
88
89
90 #define VT102ID "\033[?6c"
91
92 enum glyph_attribute {
93 ATTR_NULL = 0,
94 ATTR_REVERSE = 1,
95 ATTR_UNDERLINE = 2,
96 ATTR_BOLD = 4,
97 ATTR_ITALIC = 8,
98 ATTR_BLINK = 16,
99 ATTR_WRAP = 32,
100 ATTR_WIDE = 64,
101 ATTR_WDUMMY = 128,
102 };
103
104 enum cursor_movement {
105 CURSOR_SAVE,
106 CURSOR_LOAD
107 };
108
109 enum cursor_state {
110 CURSOR_DEFAULT = 0,
111 CURSOR_WRAPNEXT = 1,
112 CURSOR_ORIGIN = 2
113 };
114
115 enum term_mode {
116 MODE_WRAP = 1,
117 MODE_INSERT = 2,
118 MODE_APPKEYPAD = 4,
119 MODE_ALTSCREEN = 8,
120 MODE_CRLF = 16,
121 MODE_MOUSEBTN = 32,
122 MODE_MOUSEMOTION = 64,
123 MODE_REVERSE = 128,
124 MODE_KBDLOCK = 256,
125 MODE_HIDE = 512,
126 MODE_ECHO = 1024,
127 MODE_APPCURSOR = 2048,
128 MODE_MOUSESGR = 4096,
129 MODE_8BIT = 8192,
130 MODE_BLINK = 16384,
131 MODE_FBLINK = 32768,
132 MODE_FOCUS = 65536,
133 MODE_MOUSEX10 = 131072,
134 MODE_MOUSEMANY = 262144,
135 MODE_BRCKTPASTE = 524288,
136 MODE_PRINT = 1048576,
137 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
138 |MODE_MOUSEMANY,
139 };
140
141 enum charset {
142 CS_GRAPHIC0,
143 CS_GRAPHIC1,
144 CS_UK,
145 CS_USA,
146 CS_MULTI,
147 CS_GER,
148 CS_FIN
149 };
150
151 enum escape_state {
152 ESC_START = 1,
153 ESC_CSI = 2,
154 ESC_STR = 4, /* DCS, OSC, PM, APC */
155 ESC_ALTCHARSET = 8,
156 ESC_STR_END = 16, /* a final string was encountered */
157 ESC_TEST = 32, /* Enter in test mode */
158 };
159
160 enum window_state {
161 WIN_VISIBLE = 1,
162 WIN_REDRAW = 2,
163 WIN_FOCUSED = 4
164 };
165
166 enum selection_type {
167 SEL_REGULAR = 1,
168 SEL_RECTANGULAR = 2
169 };
170
171 enum selection_snap {
172 SNAP_WORD = 1,
173 SNAP_LINE = 2
174 };
175
176 typedef unsigned char uchar;
177 typedef unsigned int uint;
178 typedef unsigned long ulong;
179 typedef unsigned short ushort;
180
181 typedef XftDraw *Draw;
182 typedef XftColor Colour;
183 typedef Colormap Colourmap;
184
185 typedef struct {
186 char c[UTF_SIZ]; /* character code */
187 ushort mode; /* attribute flags */
188 uint32_t fg; /* foreground */
189 uint32_t bg; /* background */
190 } Glyph;
191
192 typedef Glyph *Line;
193
194 typedef struct {
195 Glyph attr; /* current char attributes */
196 int x;
197 int y;
198 char state;
199 } TCursor;
200
201 /* CSI Escape sequence structs */
202 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
203 typedef struct {
204 char buf[ESC_BUF_SIZ]; /* raw string */
205 int len; /* raw string length */
206 char priv;
207 int arg[ESC_ARG_SIZ];
208 int narg; /* nb of args */
209 char mode;
210 } CSIEscape;
211
212 /* STR Escape sequence structs */
213 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
214 typedef struct {
215 char type; /* ESC type ... */
216 char buf[STR_BUF_SIZ]; /* raw string */
217 int len; /* raw string length */
218 char *args[STR_ARG_SIZ];
219 int narg; /* nb of args */
220 } STREscape;
221
222 /* Internal representation of the screen */
223 typedef struct {
224 int row; /* nb row */
225 int col; /* nb col */
226 Line *line; /* screen */
227 Line *alt; /* alternate screen */
228 bool *dirty; /* dirtyness of lines */
229 TCursor c; /* cursor */
230 int top; /* top scroll limit */
231 int bot; /* bottom scroll limit */
232 int mode; /* terminal mode flags */
233 int esc; /* escape state flags */
234 char trantbl[4]; /* charset table translation */
235 int charset; /* current charset */
236 int icharset; /* selected charset for sequence */
237 bool numlock; /* lock numbers in keyboard */
238 bool *tabs;
239 } Term;
240
241 /* Purely graphic info */
242 typedef struct {
243 Display *dpy;
244 Colourmap cmap;
245 Window win;
246 Drawable buf;
247 Atom xembed, wmdeletewin, netwmname, netwmpid;
248 XIM xim;
249 XIC xic;
250 Draw draw;
251 Visual *vis;
252 XSetWindowAttributes attrs;
253 int scr;
254 bool isfixed; /* is fixed geometry? */
255 int l, t; /* left and top offset */
256 int gm; /* geometry mask */
257 int tw, th; /* tty width and height */
258 int w, h; /* window width and height */
259 int ch; /* char height */
260 int cw; /* char width */
261 char state; /* focus, redraw, visible */
262 } XWindow;
263
264 typedef struct {
265 uint b;
266 uint mask;
267 char *s;
268 } Mousekey;
269
270 typedef struct {
271 KeySym k;
272 uint mask;
273 char *s;
274 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
275 signed char appkey; /* application keypad */
276 signed char appcursor; /* application cursor */
277 signed char crlf; /* crlf mode */
278 } Key;
279
280 typedef struct {
281 int mode;
282 int type;
283 int snap;
284 /*
285 * Selection variables:
286 * nb – normalized coordinates of the beginning of the selection
287 * ne – normalized coordinates of the end of the selection
288 * ob – original coordinates of the beginning of the selection
289 * oe – original coordinates of the end of the selection
290 */
291 struct {
292 int x, y;
293 } nb, ne, ob, oe;
294
295 char *clip;
296 Atom xtarget;
297 bool alt;
298 struct timeval tclick1;
299 struct timeval tclick2;
300 } Selection;
301
302 typedef union {
303 int i;
304 uint ui;
305 float f;
306 const void *v;
307 } Arg;
308
309 typedef struct {
310 uint mod;
311 KeySym keysym;
312 void (*func)(const Arg *);
313 const Arg arg;
314 } Shortcut;
315
316 /* function definitions used in config.h */
317 static void clippaste(const Arg *);
318 static void numlock(const Arg *);
319 static void selpaste(const Arg *);
320 static void xzoom(const Arg *);
321 static void printsel(const Arg *);
322 static void printscreen(const Arg *) ;
323 static void toggleprinter(const Arg *);
324
325 /* Config.h for applying patches and the configuration. */
326 #include "config.h"
327
328 /* Font structure */
329 typedef struct {
330 int height;
331 int width;
332 int ascent;
333 int descent;
334 short lbearing;
335 short rbearing;
336 XftFont *match;
337 FcFontSet *set;
338 FcPattern *pattern;
339 } Font;
340
341 /* Drawing Context */
342 typedef struct {
343 Colour col[MAX(LEN(colorname), 256)];
344 Font font, bfont, ifont, ibfont;
345 GC gc;
346 } DC;
347
348 static void die(const char *, ...);
349 static void draw(void);
350 static void redraw(int);
351 static void drawregion(int, int, int, int);
352 static void execsh(void);
353 static void sigchld(int);
354 static void run(void);
355
356 static void csidump(void);
357 static void csihandle(void);
358 static void csiparse(void);
359 static void csireset(void);
360 static void strdump(void);
361 static void strhandle(void);
362 static void strparse(void);
363 static void strreset(void);
364
365 static int tattrset(int);
366 static void tprinter(char *, size_t);
367 static void tdumpsel(void);
368 static void tdumpline(int);
369 static void tdump(void);
370 static void tclearregion(int, int, int, int);
371 static void tcursor(int);
372 static void tdeletechar(int);
373 static void tdeleteline(int);
374 static void tinsertblank(int);
375 static void tinsertblankline(int);
376 static void tmoveto(int, int);
377 static void tmoveato(int, int);
378 static void tnew(int, int);
379 static void tnewline(int);
380 static void tputtab(int);
381 static void tputc(char *, int);
382 static void treset(void);
383 static int tresize(int, int);
384 static void tscrollup(int, int);
385 static void tscrolldown(int, int);
386 static void tsetattr(int *, int);
387 static void tsetchar(char *, Glyph *, int, int);
388 static void tsetscroll(int, int);
389 static void tswapscreen(void);
390 static void tsetdirt(int, int);
391 static void tsetdirtattr(int);
392 static void tsetmode(bool, bool, int *, int);
393 static void tfulldirt(void);
394 static void techo(char *, int);
395 static void tcontrolcode(uchar );
396 static void tdectest(char );
397 static int32_t tdefcolor(int *, int *, int);
398 static void tdeftran(char);
399 static inline bool match(uint, uint);
400 static void ttynew(void);
401 static void ttyread(void);
402 static void ttyresize(void);
403 static void ttysend(char *, size_t);
404 static void ttywrite(const char *, size_t);
405
406 static void xdraws(char *, Glyph, int, int, int, int);
407 static void xhints(void);
408 static void xclear(int, int, int, int);
409 static void xdrawcursor(void);
410 static void xinit(void);
411 static void xloadcols(void);
412 static int xsetcolorname(int, const char *);
413 static int xgeommasktogravity(int);
414 static int xloadfont(Font *, FcPattern *);
415 static void xloadfonts(char *, double);
416 static int xloadfontset(Font *);
417 static void xsettitle(char *);
418 static void xresettitle(void);
419 static void xsetpointermotion(int);
420 static void xseturgency(int);
421 static void xsetsel(char *);
422 static void xtermclear(int, int, int, int);
423 static void xunloadfont(Font *);
424 static void xunloadfonts(void);
425 static void xresize(int, int);
426
427 static void expose(XEvent *);
428 static void visibility(XEvent *);
429 static void unmap(XEvent *);
430 static char *kmap(KeySym, uint);
431 static void kpress(XEvent *);
432 static void cmessage(XEvent *);
433 static void cresize(int, int);
434 static void resize(XEvent *);
435 static void focus(XEvent *);
436 static void brelease(XEvent *);
437 static void bpress(XEvent *);
438 static void bmotion(XEvent *);
439 static void selnotify(XEvent *);
440 static void selclear(XEvent *);
441 static void selrequest(XEvent *);
442
443 static void selinit(void);
444 static void selsort(void);
445 static inline bool selected(int, int);
446 static char *getsel(void);
447 static void selcopy(void);
448 static void selscroll(int, int);
449 static void selsnap(int, int *, int *, int);
450 static void getbuttoninfo(XEvent *);
451 static void mousereport(XEvent *);
452
453 static size_t utf8decode(char *, long *, size_t);
454 static long utf8decodebyte(char, size_t *);
455 static size_t utf8encode(long, char *, size_t);
456 static char utf8encodebyte(long, size_t);
457 static size_t utf8len(char *);
458 static size_t utf8validate(long *, size_t);
459
460 static ssize_t xwrite(int, const char *, size_t);
461 static void *xmalloc(size_t);
462 static void *xrealloc(void *, size_t);
463 static char *xstrdup(char *);
464
465 static void usage(void);
466
467 static void (*handler[LASTEvent])(XEvent *) = {
468 [KeyPress] = kpress,
469 [ClientMessage] = cmessage,
470 [ConfigureNotify] = resize,
471 [VisibilityNotify] = visibility,
472 [UnmapNotify] = unmap,
473 [Expose] = expose,
474 [FocusIn] = focus,
475 [FocusOut] = focus,
476 [MotionNotify] = bmotion,
477 [ButtonPress] = bpress,
478 [ButtonRelease] = brelease,
479 [SelectionClear] = selclear,
480 [SelectionNotify] = selnotify,
481 [SelectionRequest] = selrequest,
482 };
483
484 /* Globals */
485 static DC dc;
486 static XWindow xw;
487 static Term term;
488 static CSIEscape csiescseq;
489 static STREscape strescseq;
490 static int cmdfd;
491 static pid_t pid;
492 static Selection sel;
493 static int iofd = STDOUT_FILENO;
494 static char **opt_cmd = NULL;
495 static char *opt_io = NULL;
496 static char *opt_title = NULL;
497 static char *opt_embed = NULL;
498 static char *opt_class = NULL;
499 static char *opt_font = NULL;
500 static int oldbutton = 3; /* button event on startup: 3 = release */
501
502 static char *usedfont = NULL;
503 static double usedfontsize = 0;
504
505 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
506 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
507 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
508 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
509
510 /* Font Ring Cache */
511 enum {
512 FRC_NORMAL,
513 FRC_ITALIC,
514 FRC_BOLD,
515 FRC_ITALICBOLD
516 };
517
518 typedef struct {
519 XftFont *font;
520 int flags;
521 } Fontcache;
522
523 /* Fontcache is an array now. A new font will be appended to the array. */
524 static Fontcache frc[16];
525 static int frclen = 0;
526
527 ssize_t
528 xwrite(int fd, const char *s, size_t len) {
529 size_t aux = len;
530
531 while(len > 0) {
532 ssize_t r = write(fd, s, len);
533 if(r < 0)
534 return r;
535 len -= r;
536 s += r;
537 }
538 return aux;
539 }
540
541 void *
542 xmalloc(size_t len) {
543 void *p = malloc(len);
544
545 if(!p)
546 die("Out of memory\n");
547
548 return p;
549 }
550
551 void *
552 xrealloc(void *p, size_t len) {
553 if((p = realloc(p, len)) == NULL)
554 die("Out of memory\n");
555
556 return p;
557 }
558
559 char *
560 xstrdup(char *s) {
561 if((s = strdup(s)) == NULL)
562 die("Out of memory\n");
563
564 return s;
565 }
566
567 size_t
568 utf8decode(char *c, long *u, size_t clen) {
569 size_t i, j, len, type;
570 long udecoded;
571
572 *u = UTF_INVALID;
573 if(!clen)
574 return 0;
575 udecoded = utf8decodebyte(c[0], &len);
576 if(!BETWEEN(len, 1, UTF_SIZ))
577 return 1;
578 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
579 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
580 if(type != 0)
581 return j;
582 }
583 if(j < len)
584 return 0;
585 *u = udecoded;
586 utf8validate(u, len);
587 return len;
588 }
589
590 long
591 utf8decodebyte(char c, size_t *i) {
592 for(*i = 0; *i < LEN(utfmask); ++(*i))
593 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
594 return (uchar)c & ~utfmask[*i];
595 return 0;
596 }
597
598 size_t
599 utf8encode(long u, char *c, size_t clen) {
600 size_t len, i;
601
602 len = utf8validate(&u, 0);
603 if(clen < len)
604 return 0;
605 for(i = len - 1; i != 0; --i) {
606 c[i] = utf8encodebyte(u, 0);
607 u >>= 6;
608 }
609 c[0] = utf8encodebyte(u, len);
610 return len;
611 }
612
613 char
614 utf8encodebyte(long u, size_t i) {
615 return utfbyte[i] | (u & ~utfmask[i]);
616 }
617
618 size_t
619 utf8len(char *c) {
620 return utf8decode(c, &(long){0}, UTF_SIZ);
621 }
622
623 size_t
624 utf8validate(long *u, size_t i) {
625 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
626 *u = UTF_INVALID;
627 for(i = 1; *u > utfmax[i]; ++i)
628 ;
629 return i;
630 }
631
632 static void
633 selinit(void) {
634 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
635 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
636 sel.mode = 0;
637 sel.ob.x = -1;
638 sel.clip = NULL;
639 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
640 if(sel.xtarget == None)
641 sel.xtarget = XA_STRING;
642 }
643
644 static int
645 x2col(int x) {
646 x -= borderpx;
647 x /= xw.cw;
648
649 return LIMIT(x, 0, term.col-1);
650 }
651
652 static int
653 y2row(int y) {
654 y -= borderpx;
655 y /= xw.ch;
656
657 return LIMIT(y, 0, term.row-1);
658 }
659
660 static void
661 selsort(void) {
662 if(sel.ob.y == sel.oe.y) {
663 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
664 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
665 } else {
666 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
667 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
668 }
669 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
670 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
671 }
672
673 static inline bool
674 selected(int x, int y) {
675 if(sel.type == SEL_RECTANGULAR)
676 return BETWEEN(y, sel.nb.y, sel.ne.y)
677 && BETWEEN(x, sel.nb.x, sel.ne.x);
678
679 return BETWEEN(y, sel.nb.y, sel.ne.y)
680 && (y != sel.nb.y || x >= sel.nb.x)
681 && (y != sel.ne.y || x <= sel.ne.x);
682 }
683
684 void
685 selsnap(int mode, int *x, int *y, int direction) {
686 int i;
687
688 switch(mode) {
689 case SNAP_WORD:
690 /*
691 * Snap around if the word wraps around at the end or
692 * beginning of a line.
693 */
694 for(;;) {
695 if(direction < 0 && *x <= 0) {
696 if(*y > 0 && term.line[*y - 1][term.col-1].mode
697 & ATTR_WRAP) {
698 *y -= 1;
699 *x = term.col-1;
700 } else {
701 break;
702 }
703 }
704 if(direction > 0 && *x >= term.col-1) {
705 if(*y < term.row-1 && term.line[*y][*x].mode
706 & ATTR_WRAP) {
707 *y += 1;
708 *x = 0;
709 } else {
710 break;
711 }
712 }
713
714 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
715 *x += direction;
716 continue;
717 }
718
719 if(strchr(worddelimiters,
720 term.line[*y][*x+direction].c[0])) {
721 break;
722 }
723
724 *x += direction;
725 }
726 break;
727 case SNAP_LINE:
728 /*
729 * Snap around if the the previous line or the current one
730 * has set ATTR_WRAP at its end. Then the whole next or
731 * previous line will be selected.
732 */
733 *x = (direction < 0) ? 0 : term.col - 1;
734 if(direction < 0 && *y > 0) {
735 for(; *y > 0; *y += direction) {
736 if(!(term.line[*y-1][term.col-1].mode
737 & ATTR_WRAP)) {
738 break;
739 }
740 }
741 } else if(direction > 0 && *y < term.row-1) {
742 for(; *y < term.row; *y += direction) {
743 if(!(term.line[*y][term.col-1].mode
744 & ATTR_WRAP)) {
745 break;
746 }
747 }
748 }
749 break;
750 default:
751 /*
752 * Select the whole line when the end of line is reached.
753 */
754 if(direction > 0) {
755 i = term.col;
756 while(--i > 0 && term.line[*y][i].c[0] == ' ')
757 /* nothing */;
758 if(i > 0 && i < *x)
759 *x = term.col - 1;
760 }
761 break;
762 }
763 }
764
765 void
766 getbuttoninfo(XEvent *e) {
767 int type;
768 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
769
770 sel.alt = IS_SET(MODE_ALTSCREEN);
771
772 sel.oe.x = x2col(e->xbutton.x);
773 sel.oe.y = y2row(e->xbutton.y);
774
775 if(sel.ob.y < sel.oe.y
776 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
777 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
778 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
779 } else {
780 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
781 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
782 }
783 selsort();
784
785 sel.type = SEL_REGULAR;
786 for(type = 1; type < LEN(selmasks); ++type) {
787 if(match(selmasks[type], state)) {
788 sel.type = type;
789 break;
790 }
791 }
792 }
793
794 void
795 mousereport(XEvent *e) {
796 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
797 button = e->xbutton.button, state = e->xbutton.state,
798 len;
799 char buf[40];
800 static int ox, oy;
801
802 /* from urxvt */
803 if(e->xbutton.type == MotionNotify) {
804 if(x == ox && y == oy)
805 return;
806 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
807 return;
808 /* MOUSE_MOTION: no reporting if no button is pressed */
809 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
810 return;
811
812 button = oldbutton + 32;
813 ox = x;
814 oy = y;
815 } else {
816 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
817 button = 3;
818 } else {
819 button -= Button1;
820 if(button >= 3)
821 button += 64 - 3;
822 }
823 if(e->xbutton.type == ButtonPress) {
824 oldbutton = button;
825 ox = x;
826 oy = y;
827 } else if(e->xbutton.type == ButtonRelease) {
828 oldbutton = 3;
829 /* MODE_MOUSEX10: no button release reporting */
830 if(IS_SET(MODE_MOUSEX10))
831 return;
832 if (button == 64 || button == 65)
833 return;
834 }
835 }
836
837 if(!IS_SET(MODE_MOUSEX10)) {
838 button += (state & ShiftMask ? 4 : 0)
839 + (state & Mod4Mask ? 8 : 0)
840 + (state & ControlMask ? 16 : 0);
841 }
842
843 len = 0;
844 if(IS_SET(MODE_MOUSESGR)) {
845 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
846 button, x+1, y+1,
847 e->xbutton.type == ButtonRelease ? 'm' : 'M');
848 } else if(x < 223 && y < 223) {
849 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
850 32+button, 32+x+1, 32+y+1);
851 } else {
852 return;
853 }
854
855 ttywrite(buf, len);
856 }
857
858 void
859 bpress(XEvent *e) {
860 struct timeval now;
861 Mousekey *mk;
862
863 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
864 mousereport(e);
865 return;
866 }
867
868 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
869 if(e->xbutton.button == mk->b
870 && match(mk->mask, e->xbutton.state)) {
871 ttysend(mk->s, strlen(mk->s));
872 return;
873 }
874 }
875
876 if(e->xbutton.button == Button1) {
877 gettimeofday(&now, NULL);
878
879 /* Clear previous selection, logically and visually. */
880 selclear(NULL);
881 sel.mode = 1;
882 sel.type = SEL_REGULAR;
883 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
884 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
885
886 /*
887 * If the user clicks below predefined timeouts specific
888 * snapping behaviour is exposed.
889 */
890 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
891 sel.snap = SNAP_LINE;
892 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
893 sel.snap = SNAP_WORD;
894 } else {
895 sel.snap = 0;
896 }
897 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
898 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
899 selsort();
900
901 /*
902 * Draw selection, unless it's regular and we don't want to
903 * make clicks visible
904 */
905 if(sel.snap != 0) {
906 sel.mode++;
907 tsetdirt(sel.nb.y, sel.ne.y);
908 }
909 sel.tclick2 = sel.tclick1;
910 sel.tclick1 = now;
911 }
912 }
913
914 char *
915 getsel(void) {
916 char *str, *ptr;
917 int x, y, bufsize, size, i, ex;
918 Glyph *gp, *last;
919
920 if(sel.ob.x == -1)
921 return NULL;
922
923 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
924 ptr = str = xmalloc(bufsize);
925
926 /* append every set & selected glyph to the selection */
927 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
928 gp = &term.line[y][0];
929 last = &gp[term.col-1];
930
931 while(last >= gp && !(selected(last - gp, y) &&
932 strcmp(last->c, " ") != 0)) {
933 --last;
934 }
935
936 for(x = 0; gp <= last; x++, ++gp) {
937 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
938 continue;
939
940 size = utf8len(gp->c);
941 memcpy(ptr, gp->c, size);
942 ptr += size;
943 }
944
945 /*
946 * Copy and pasting of line endings is inconsistent
947 * in the inconsistent terminal and GUI world.
948 * The best solution seems like to produce '\n' when
949 * something is copied from st and convert '\n' to
950 * '\r', when something to be pasted is received by
951 * st.
952 * FIXME: Fix the computer world.
953 */
954 if(y < sel.ne.y && !(x > 0 && (gp-1)->mode & ATTR_WRAP))
955 *ptr++ = '\n';
956
957 /*
958 * If the last selected line expands in the selection
959 * after the visible text '\n' is appended.
960 */
961 if(y == sel.ne.y) {
962 i = term.col;
963 while(--i > 0 && term.line[y][i].c[0] == ' ')
964 /* nothing */;
965 ex = sel.ne.x;
966 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
967 ex = sel.nb.x;
968 if(i < ex)
969 *ptr++ = '\n';
970 }
971 }
972 *ptr = 0;
973 return str;
974 }
975
976 void
977 selcopy(void) {
978 xsetsel(getsel());
979 }
980
981 void
982 selnotify(XEvent *e) {
983 ulong nitems, ofs, rem;
984 int format;
985 uchar *data, *last, *repl;
986 Atom type;
987
988 ofs = 0;
989 do {
990 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
991 False, AnyPropertyType, &type, &format,
992 &nitems, &rem, &data)) {
993 fprintf(stderr, "Clipboard allocation failed\n");
994 return;
995 }
996
997 /*
998 * As seen in getsel:
999 * Line endings are inconsistent in the terminal and GUI world
1000 * copy and pasting. When receiving some selection data,
1001 * replace all '\n' with '\r'.
1002 * FIXME: Fix the computer world.
1003 */
1004 repl = data;
1005 last = data + nitems * format / 8;
1006 while((repl = memchr(repl, '\n', last - repl))) {
1007 *repl++ = '\r';
1008 }
1009
1010 if(IS_SET(MODE_BRCKTPASTE))
1011 ttywrite("\033[200~", 6);
1012 ttysend((char *)data, nitems * format / 8);
1013 if(IS_SET(MODE_BRCKTPASTE))
1014 ttywrite("\033[201~", 6);
1015 XFree(data);
1016 /* number of 32-bit chunks returned */
1017 ofs += nitems * format / 32;
1018 } while(rem > 0);
1019 }
1020
1021 void
1022 selpaste(const Arg *dummy) {
1023 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1024 xw.win, CurrentTime);
1025 }
1026
1027 void
1028 clippaste(const Arg *dummy) {
1029 Atom clipboard;
1030
1031 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1032 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1033 xw.win, CurrentTime);
1034 }
1035
1036 void
1037 selclear(XEvent *e) {
1038 if(sel.ob.x == -1)
1039 return;
1040 sel.ob.x = -1;
1041 tsetdirt(sel.nb.y, sel.ne.y);
1042 }
1043
1044 void
1045 selrequest(XEvent *e) {
1046 XSelectionRequestEvent *xsre;
1047 XSelectionEvent xev;
1048 Atom xa_targets, string;
1049
1050 xsre = (XSelectionRequestEvent *) e;
1051 xev.type = SelectionNotify;
1052 xev.requestor = xsre->requestor;
1053 xev.selection = xsre->selection;
1054 xev.target = xsre->target;
1055 xev.time = xsre->time;
1056 /* reject */
1057 xev.property = None;
1058
1059 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1060 if(xsre->target == xa_targets) {
1061 /* respond with the supported type */
1062 string = sel.xtarget;
1063 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1064 XA_ATOM, 32, PropModeReplace,
1065 (uchar *) &string, 1);
1066 xev.property = xsre->property;
1067 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1068 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1069 xsre->target, 8, PropModeReplace,
1070 (uchar *) sel.clip, strlen(sel.clip));
1071 xev.property = xsre->property;
1072 }
1073
1074 /* all done, send a notification to the listener */
1075 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1076 fprintf(stderr, "Error sending SelectionNotify event\n");
1077 }
1078
1079 void
1080 xsetsel(char *str) {
1081 /* register the selection for both the clipboard and the primary */
1082 Atom clipboard;
1083
1084 free(sel.clip);
1085 sel.clip = str;
1086
1087 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1088
1089 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1090 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1091 }
1092
1093 void
1094 brelease(XEvent *e) {
1095 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1096 mousereport(e);
1097 return;
1098 }
1099
1100 if(e->xbutton.button == Button2) {
1101 selpaste(NULL);
1102 } else if(e->xbutton.button == Button1) {
1103 if(sel.mode < 2) {
1104 selclear(NULL);
1105 } else {
1106 getbuttoninfo(e);
1107 selcopy();
1108 }
1109 sel.mode = 0;
1110 tsetdirt(sel.nb.y, sel.ne.y);
1111 }
1112 }
1113
1114 void
1115 bmotion(XEvent *e) {
1116 int oldey, oldex, oldsby, oldsey;
1117
1118 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1119 mousereport(e);
1120 return;
1121 }
1122
1123 if(!sel.mode)
1124 return;
1125
1126 sel.mode++;
1127 oldey = sel.oe.y;
1128 oldex = sel.oe.x;
1129 oldsby = sel.nb.y;
1130 oldsey = sel.ne.y;
1131 getbuttoninfo(e);
1132
1133 if(oldey != sel.oe.y || oldex != sel.oe.x)
1134 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1135 }
1136
1137 void
1138 die(const char *errstr, ...) {
1139 va_list ap;
1140
1141 va_start(ap, errstr);
1142 vfprintf(stderr, errstr, ap);
1143 va_end(ap);
1144 exit(EXIT_FAILURE);
1145 }
1146
1147 void
1148 execsh(void) {
1149 char **args;
1150 char *envshell = getenv("SHELL");
1151 const struct passwd *pass = getpwuid(getuid());
1152 char buf[sizeof(long) * 8 + 1];
1153
1154 unsetenv("COLUMNS");
1155 unsetenv("LINES");
1156 unsetenv("TERMCAP");
1157
1158 if(pass) {
1159 setenv("LOGNAME", pass->pw_name, 1);
1160 setenv("USER", pass->pw_name, 1);
1161 setenv("SHELL", pass->pw_shell, 0);
1162 setenv("HOME", pass->pw_dir, 0);
1163 }
1164
1165 snprintf(buf, sizeof(buf), "%lu", xw.win);
1166 setenv("WINDOWID", buf, 1);
1167
1168 signal(SIGCHLD, SIG_DFL);
1169 signal(SIGHUP, SIG_DFL);
1170 signal(SIGINT, SIG_DFL);
1171 signal(SIGQUIT, SIG_DFL);
1172 signal(SIGTERM, SIG_DFL);
1173 signal(SIGALRM, SIG_DFL);
1174
1175 DEFAULT(envshell, shell);
1176 setenv("TERM", termname, 1);
1177 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1178 execvp(args[0], args);
1179 exit(EXIT_FAILURE);
1180 }
1181
1182 void
1183 sigchld(int a) {
1184 int stat = 0;
1185
1186 if(waitpid(pid, &stat, 0) < 0)
1187 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1188
1189 if(WIFEXITED(stat)) {
1190 exit(WEXITSTATUS(stat));
1191 } else {
1192 exit(EXIT_FAILURE);
1193 }
1194 }
1195
1196 void
1197 ttynew(void) {
1198 int m, s;
1199 struct winsize w = {term.row, term.col, 0, 0};
1200
1201 /* seems to work fine on linux, openbsd and freebsd */
1202 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1203 die("openpty failed: %s\n", strerror(errno));
1204
1205 switch(pid = fork()) {
1206 case -1:
1207 die("fork failed\n");
1208 break;
1209 case 0:
1210 setsid(); /* create a new process group */
1211 dup2(s, STDIN_FILENO);
1212 dup2(s, STDOUT_FILENO);
1213 dup2(s, STDERR_FILENO);
1214 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1215 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1216 close(s);
1217 close(m);
1218 execsh();
1219 break;
1220 default:
1221 close(s);
1222 cmdfd = m;
1223 signal(SIGCHLD, sigchld);
1224 if(opt_io) {
1225 term.mode |= MODE_PRINT;
1226 iofd = (!strcmp(opt_io, "-")) ?
1227 STDOUT_FILENO :
1228 open(opt_io, O_WRONLY | O_CREAT, 0666);
1229 if(iofd < 0) {
1230 fprintf(stderr, "Error opening %s:%s\n",
1231 opt_io, strerror(errno));
1232 }
1233 }
1234 break;
1235 }
1236 }
1237
1238 void
1239 ttyread(void) {
1240 static char buf[BUFSIZ];
1241 static int buflen = 0;
1242 char *ptr;
1243 char s[UTF_SIZ];
1244 int charsize; /* size of utf8 char in bytes */
1245 long unicodep;
1246 int ret;
1247
1248 /* append read bytes to unprocessed bytes */
1249 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1250 die("Couldn't read from shell: %s\n", strerror(errno));
1251
1252 /* process every complete utf8 char */
1253 buflen += ret;
1254 ptr = buf;
1255 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1256 utf8encode(unicodep, s, UTF_SIZ);
1257 tputc(s, charsize);
1258 ptr += charsize;
1259 buflen -= charsize;
1260 }
1261
1262 /* keep any uncomplete utf8 char for the next call */
1263 memmove(buf, ptr, buflen);
1264 }
1265
1266 void
1267 ttywrite(const char *s, size_t n) {
1268 if(xwrite(cmdfd, s, n) == -1)
1269 die("write error on tty: %s\n", strerror(errno));
1270 }
1271
1272 void
1273 ttysend(char *s, size_t n) {
1274 ttywrite(s, n);
1275 if(IS_SET(MODE_ECHO))
1276 techo(s, n);
1277 }
1278
1279 void
1280 ttyresize(void) {
1281 struct winsize w;
1282
1283 w.ws_row = term.row;
1284 w.ws_col = term.col;
1285 w.ws_xpixel = xw.tw;
1286 w.ws_ypixel = xw.th;
1287 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1288 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1289 }
1290
1291 int
1292 tattrset(int attr) {
1293 int i, j;
1294
1295 for(i = 0; i < term.row-1; i++) {
1296 for(j = 0; j < term.col-1; j++) {
1297 if(term.line[i][j].mode & attr)
1298 return 1;
1299 }
1300 }
1301
1302 return 0;
1303 }
1304
1305 void
1306 tsetdirt(int top, int bot) {
1307 int i;
1308
1309 LIMIT(top, 0, term.row-1);
1310 LIMIT(bot, 0, term.row-1);
1311
1312 for(i = top; i <= bot; i++)
1313 term.dirty[i] = 1;
1314 }
1315
1316 void
1317 tsetdirtattr(int attr) {
1318 int i, j;
1319
1320 for(i = 0; i < term.row-1; i++) {
1321 for(j = 0; j < term.col-1; j++) {
1322 if(term.line[i][j].mode & attr) {
1323 tsetdirt(i, i);
1324 break;
1325 }
1326 }
1327 }
1328 }
1329
1330 void
1331 tfulldirt(void) {
1332 tsetdirt(0, term.row-1);
1333 }
1334
1335 void
1336 tcursor(int mode) {
1337 static TCursor c[2];
1338 bool alt = IS_SET(MODE_ALTSCREEN);
1339
1340 if(mode == CURSOR_SAVE) {
1341 c[alt] = term.c;
1342 } else if(mode == CURSOR_LOAD) {
1343 term.c = c[alt];
1344 tmoveto(c[alt].x, c[alt].y);
1345 }
1346 }
1347
1348 void
1349 treset(void) {
1350 uint i;
1351
1352 term.c = (TCursor){{
1353 .mode = ATTR_NULL,
1354 .fg = defaultfg,
1355 .bg = defaultbg
1356 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1357
1358 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1359 for(i = tabspaces; i < term.col; i += tabspaces)
1360 term.tabs[i] = 1;
1361 term.top = 0;
1362 term.bot = term.row - 1;
1363 term.mode = MODE_WRAP;
1364 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1365 term.charset = 0;
1366
1367 tclearregion(0, 0, term.col-1, term.row-1);
1368 tmoveto(0, 0);
1369 tcursor(CURSOR_SAVE);
1370 }
1371
1372 void
1373 tnew(int col, int row) {
1374 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1375 tresize(col, row);
1376 term.numlock = 1;
1377
1378 treset();
1379 }
1380
1381 void
1382 tswapscreen(void) {
1383 Line *tmp = term.line;
1384
1385 term.line = term.alt;
1386 term.alt = tmp;
1387 term.mode ^= MODE_ALTSCREEN;
1388 tfulldirt();
1389 }
1390
1391 void
1392 tscrolldown(int orig, int n) {
1393 int i;
1394 Line temp;
1395
1396 LIMIT(n, 0, term.bot-orig+1);
1397
1398 tsetdirt(orig, term.bot-n);
1399 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1400
1401 for(i = term.bot; i >= orig+n; i--) {
1402 temp = term.line[i];
1403 term.line[i] = term.line[i-n];
1404 term.line[i-n] = temp;
1405 }
1406
1407 selscroll(orig, n);
1408 }
1409
1410 void
1411 tscrollup(int orig, int n) {
1412 int i;
1413 Line temp;
1414
1415 LIMIT(n, 0, term.bot-orig+1);
1416
1417 tclearregion(0, orig, term.col-1, orig+n-1);
1418 tsetdirt(orig+n, term.bot);
1419
1420 for(i = orig; i <= term.bot-n; i++) {
1421 temp = term.line[i];
1422 term.line[i] = term.line[i+n];
1423 term.line[i+n] = temp;
1424 }
1425
1426 selscroll(orig, -n);
1427 }
1428
1429 void
1430 selscroll(int orig, int n) {
1431 if(sel.ob.x == -1)
1432 return;
1433
1434 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1435 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1436 selclear(NULL);
1437 return;
1438 }
1439 if(sel.type == SEL_RECTANGULAR) {
1440 if(sel.ob.y < term.top)
1441 sel.ob.y = term.top;
1442 if(sel.oe.y > term.bot)
1443 sel.oe.y = term.bot;
1444 } else {
1445 if(sel.ob.y < term.top) {
1446 sel.ob.y = term.top;
1447 sel.ob.x = 0;
1448 }
1449 if(sel.oe.y > term.bot) {
1450 sel.oe.y = term.bot;
1451 sel.oe.x = term.col;
1452 }
1453 }
1454 selsort();
1455 }
1456 }
1457
1458 void
1459 tnewline(int first_col) {
1460 int y = term.c.y;
1461
1462 if(y == term.bot) {
1463 tscrollup(term.top, 1);
1464 } else {
1465 y++;
1466 }
1467 tmoveto(first_col ? 0 : term.c.x, y);
1468 }
1469
1470 void
1471 csiparse(void) {
1472 char *p = csiescseq.buf, *np;
1473 long int v;
1474
1475 csiescseq.narg = 0;
1476 if(*p == '?') {
1477 csiescseq.priv = 1;
1478 p++;
1479 }
1480
1481 csiescseq.buf[csiescseq.len] = '\0';
1482 while(p < csiescseq.buf+csiescseq.len) {
1483 np = NULL;
1484 v = strtol(p, &np, 10);
1485 if(np == p)
1486 v = 0;
1487 if(v == LONG_MAX || v == LONG_MIN)
1488 v = -1;
1489 csiescseq.arg[csiescseq.narg++] = v;
1490 p = np;
1491 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1492 break;
1493 p++;
1494 }
1495 csiescseq.mode = *p;
1496 }
1497
1498 /* for absolute user moves, when decom is set */
1499 void
1500 tmoveato(int x, int y) {
1501 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1502 }
1503
1504 void
1505 tmoveto(int x, int y) {
1506 int miny, maxy;
1507
1508 if(term.c.state & CURSOR_ORIGIN) {
1509 miny = term.top;
1510 maxy = term.bot;
1511 } else {
1512 miny = 0;
1513 maxy = term.row - 1;
1514 }
1515 LIMIT(x, 0, term.col-1);
1516 LIMIT(y, miny, maxy);
1517 term.c.state &= ~CURSOR_WRAPNEXT;
1518 term.c.x = x;
1519 term.c.y = y;
1520 }
1521
1522 void
1523 tsetchar(char *c, Glyph *attr, int x, int y) {
1524 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1525 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1526 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1527 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1528 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1529 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1530 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1531 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1532 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1533 };
1534
1535 /*
1536 * The table is proudly stolen from rxvt.
1537 */
1538 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1539 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1540 c = vt100_0[c[0] - 0x41];
1541 }
1542 }
1543
1544 if(term.line[y][x].mode & ATTR_WIDE) {
1545 if(x+1 < term.col) {
1546 term.line[y][x+1].c[0] = ' ';
1547 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1548 }
1549 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1550 term.line[y][x-1].c[0] = ' ';
1551 term.line[y][x-1].mode &= ~ATTR_WIDE;
1552 }
1553
1554 term.dirty[y] = 1;
1555 term.line[y][x] = *attr;
1556 memcpy(term.line[y][x].c, c, UTF_SIZ);
1557 }
1558
1559 void
1560 tclearregion(int x1, int y1, int x2, int y2) {
1561 int x, y, temp;
1562
1563 if(x1 > x2)
1564 temp = x1, x1 = x2, x2 = temp;
1565 if(y1 > y2)
1566 temp = y1, y1 = y2, y2 = temp;
1567
1568 LIMIT(x1, 0, term.col-1);
1569 LIMIT(x2, 0, term.col-1);
1570 LIMIT(y1, 0, term.row-1);
1571 LIMIT(y2, 0, term.row-1);
1572
1573 for(y = y1; y <= y2; y++) {
1574 term.dirty[y] = 1;
1575 for(x = x1; x <= x2; x++) {
1576 if(selected(x, y))
1577 selclear(NULL);
1578 term.line[y][x] = term.c.attr;
1579 memcpy(term.line[y][x].c, " ", 2);
1580 }
1581 }
1582 }
1583
1584 void
1585 tdeletechar(int n) {
1586 int dst, src, size;
1587 Glyph *line;
1588
1589 LIMIT(n, 0, term.col - term.c.x);
1590
1591 dst = term.c.x;
1592 src = term.c.x + n;
1593 size = term.col - src;
1594 line = term.line[term.c.y];
1595
1596 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1597 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1598 }
1599
1600 void
1601 tinsertblank(int n) {
1602 int dst, src, size;
1603 Glyph *line;
1604
1605 LIMIT(n, 0, term.col - term.c.x);
1606
1607 dst = term.c.x + n;
1608 src = term.c.x;
1609 size = term.col - dst;
1610 line = term.line[term.c.y];
1611
1612 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1613 tclearregion(src, term.c.y, dst - 1, term.c.y);
1614 }
1615
1616 void
1617 tinsertblankline(int n) {
1618 if(BETWEEN(term.c.y, term.top, term.bot))
1619 tscrolldown(term.c.y, n);
1620 }
1621
1622 void
1623 tdeleteline(int n) {
1624 if(BETWEEN(term.c.y, term.top, term.bot))
1625 tscrollup(term.c.y, n);
1626 }
1627
1628 int32_t
1629 tdefcolor(int *attr, int *npar, int l) {
1630 int32_t idx = -1;
1631 uint r, g, b;
1632
1633 switch (attr[*npar + 1]) {
1634 case 2: /* direct colour in RGB space */
1635 if (*npar + 4 >= l) {
1636 fprintf(stderr,
1637 "erresc(38): Incorrect number of parameters (%d)\n",
1638 *npar);
1639 break;
1640 }
1641 r = attr[*npar + 2];
1642 g = attr[*npar + 3];
1643 b = attr[*npar + 4];
1644 *npar += 4;
1645 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1646 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1647 r, g, b);
1648 else
1649 idx = TRUECOLOR(r, g, b);
1650 break;
1651 case 5: /* indexed colour */
1652 if (*npar + 2 >= l) {
1653 fprintf(stderr,
1654 "erresc(38): Incorrect number of parameters (%d)\n",
1655 *npar);
1656 break;
1657 }
1658 *npar += 2;
1659 if(!BETWEEN(attr[*npar], 0, 255))
1660 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1661 else
1662 idx = attr[*npar];
1663 break;
1664 case 0: /* implemented defined (only foreground) */
1665 case 1: /* transparent */
1666 case 3: /* direct colour in CMY space */
1667 case 4: /* direct colour in CMYK space */
1668 default:
1669 fprintf(stderr,
1670 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1671 break;
1672 }
1673
1674 return idx;
1675 }
1676
1677 void
1678 tsetattr(int *attr, int l) {
1679 int i;
1680 int32_t idx;
1681
1682 for(i = 0; i < l; i++) {
1683 switch(attr[i]) {
1684 case 0:
1685 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1686 | ATTR_BOLD | ATTR_ITALIC \
1687 | ATTR_BLINK);
1688 term.c.attr.fg = defaultfg;
1689 term.c.attr.bg = defaultbg;
1690 break;
1691 case 1:
1692 term.c.attr.mode |= ATTR_BOLD;
1693 break;
1694 case 3:
1695 term.c.attr.mode |= ATTR_ITALIC;
1696 break;
1697 case 4:
1698 term.c.attr.mode |= ATTR_UNDERLINE;
1699 break;
1700 case 5: /* slow blink */
1701 case 6: /* rapid blink */
1702 term.c.attr.mode |= ATTR_BLINK;
1703 break;
1704 case 7:
1705 term.c.attr.mode |= ATTR_REVERSE;
1706 break;
1707 case 21:
1708 case 22:
1709 term.c.attr.mode &= ~ATTR_BOLD;
1710 break;
1711 case 23:
1712 term.c.attr.mode &= ~ATTR_ITALIC;
1713 break;
1714 case 24:
1715 term.c.attr.mode &= ~ATTR_UNDERLINE;
1716 break;
1717 case 25:
1718 case 26:
1719 term.c.attr.mode &= ~ATTR_BLINK;
1720 break;
1721 case 27:
1722 term.c.attr.mode &= ~ATTR_REVERSE;
1723 break;
1724 case 38:
1725 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1726 term.c.attr.fg = idx;
1727 break;
1728 case 39:
1729 term.c.attr.fg = defaultfg;
1730 break;
1731 case 48:
1732 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1733 term.c.attr.bg = idx;
1734 break;
1735 case 49:
1736 term.c.attr.bg = defaultbg;
1737 break;
1738 default:
1739 if(BETWEEN(attr[i], 30, 37)) {
1740 term.c.attr.fg = attr[i] - 30;
1741 } else if(BETWEEN(attr[i], 40, 47)) {
1742 term.c.attr.bg = attr[i] - 40;
1743 } else if(BETWEEN(attr[i], 90, 97)) {
1744 term.c.attr.fg = attr[i] - 90 + 8;
1745 } else if(BETWEEN(attr[i], 100, 107)) {
1746 term.c.attr.bg = attr[i] - 100 + 8;
1747 } else {
1748 fprintf(stderr,
1749 "erresc(default): gfx attr %d unknown\n",
1750 attr[i]), csidump();
1751 }
1752 break;
1753 }
1754 }
1755 }
1756
1757 void
1758 tsetscroll(int t, int b) {
1759 int temp;
1760
1761 LIMIT(t, 0, term.row-1);
1762 LIMIT(b, 0, term.row-1);
1763 if(t > b) {
1764 temp = t;
1765 t = b;
1766 b = temp;
1767 }
1768 term.top = t;
1769 term.bot = b;
1770 }
1771
1772 void
1773 tsetmode(bool priv, bool set, int *args, int narg) {
1774 int *lim, mode;
1775 bool alt;
1776
1777 for(lim = args + narg; args < lim; ++args) {
1778 if(priv) {
1779 switch(*args) {
1780 case 1: /* DECCKM -- Cursor key */
1781 MODBIT(term.mode, set, MODE_APPCURSOR);
1782 break;
1783 case 5: /* DECSCNM -- Reverse video */
1784 mode = term.mode;
1785 MODBIT(term.mode, set, MODE_REVERSE);
1786 if(mode != term.mode)
1787 redraw(REDRAW_TIMEOUT);
1788 break;
1789 case 6: /* DECOM -- Origin */
1790 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1791 tmoveato(0, 0);
1792 break;
1793 case 7: /* DECAWM -- Auto wrap */
1794 MODBIT(term.mode, set, MODE_WRAP);
1795 break;
1796 case 0: /* Error (IGNORED) */
1797 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1798 case 3: /* DECCOLM -- Column (IGNORED) */
1799 case 4: /* DECSCLM -- Scroll (IGNORED) */
1800 case 8: /* DECARM -- Auto repeat (IGNORED) */
1801 case 18: /* DECPFF -- Printer feed (IGNORED) */
1802 case 19: /* DECPEX -- Printer extent (IGNORED) */
1803 case 42: /* DECNRCM -- National characters (IGNORED) */
1804 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1805 break;
1806 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1807 MODBIT(term.mode, !set, MODE_HIDE);
1808 break;
1809 case 9: /* X10 mouse compatibility mode */
1810 xsetpointermotion(0);
1811 MODBIT(term.mode, 0, MODE_MOUSE);
1812 MODBIT(term.mode, set, MODE_MOUSEX10);
1813 break;
1814 case 1000: /* 1000: report button press */
1815 xsetpointermotion(0);
1816 MODBIT(term.mode, 0, MODE_MOUSE);
1817 MODBIT(term.mode, set, MODE_MOUSEBTN);
1818 break;
1819 case 1002: /* 1002: report motion on button press */
1820 xsetpointermotion(0);
1821 MODBIT(term.mode, 0, MODE_MOUSE);
1822 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1823 break;
1824 case 1003: /* 1003: enable all mouse motions */
1825 xsetpointermotion(set);
1826 MODBIT(term.mode, 0, MODE_MOUSE);
1827 MODBIT(term.mode, set, MODE_MOUSEMANY);
1828 break;
1829 case 1004: /* 1004: send focus events to tty */
1830 MODBIT(term.mode, set, MODE_FOCUS);
1831 break;
1832 case 1006: /* 1006: extended reporting mode */
1833 MODBIT(term.mode, set, MODE_MOUSESGR);
1834 break;
1835 case 1034:
1836 MODBIT(term.mode, set, MODE_8BIT);
1837 break;
1838 case 1049: /* swap screen & set/restore cursor as xterm */
1839 if (!allowaltscreen)
1840 break;
1841 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1842 /* FALLTHROUGH */
1843 case 47: /* swap screen */
1844 case 1047:
1845 if (!allowaltscreen)
1846 break;
1847 alt = IS_SET(MODE_ALTSCREEN);
1848 if(alt) {
1849 tclearregion(0, 0, term.col-1,
1850 term.row-1);
1851 }
1852 if(set ^ alt) /* set is always 1 or 0 */
1853 tswapscreen();
1854 if(*args != 1049)
1855 break;
1856 /* FALLTHROUGH */
1857 case 1048:
1858 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1859 break;
1860 case 2004: /* 2004: bracketed paste mode */
1861 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1862 break;
1863 /* Not implemented mouse modes. See comments there. */
1864 case 1001: /* mouse highlight mode; can hang the
1865 terminal by design when implemented. */
1866 case 1005: /* UTF-8 mouse mode; will confuse
1867 applications not supporting UTF-8
1868 and luit. */
1869 case 1015: /* urxvt mangled mouse mode; incompatible
1870 and can be mistaken for other control
1871 codes. */
1872 default:
1873 fprintf(stderr,
1874 "erresc: unknown private set/reset mode %d\n",
1875 *args);
1876 break;
1877 }
1878 } else {
1879 switch(*args) {
1880 case 0: /* Error (IGNORED) */
1881 break;
1882 case 2: /* KAM -- keyboard action */
1883 MODBIT(term.mode, set, MODE_KBDLOCK);
1884 break;
1885 case 4: /* IRM -- Insertion-replacement */
1886 MODBIT(term.mode, set, MODE_INSERT);
1887 break;
1888 case 12: /* SRM -- Send/Receive */
1889 MODBIT(term.mode, !set, MODE_ECHO);
1890 break;
1891 case 20: /* LNM -- Linefeed/new line */
1892 MODBIT(term.mode, set, MODE_CRLF);
1893 break;
1894 default:
1895 fprintf(stderr,
1896 "erresc: unknown set/reset mode %d\n",
1897 *args);
1898 break;
1899 }
1900 }
1901 }
1902 }
1903
1904 void
1905 csihandle(void) {
1906 char buf[40];
1907 int len;
1908
1909 switch(csiescseq.mode) {
1910 default:
1911 unknown:
1912 fprintf(stderr, "erresc: unknown csi ");
1913 csidump();
1914 /* die(""); */
1915 break;
1916 case '@': /* ICH -- Insert <n> blank char */
1917 DEFAULT(csiescseq.arg[0], 1);
1918 tinsertblank(csiescseq.arg[0]);
1919 break;
1920 case 'A': /* CUU -- Cursor <n> Up */
1921 DEFAULT(csiescseq.arg[0], 1);
1922 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1923 break;
1924 case 'B': /* CUD -- Cursor <n> Down */
1925 case 'e': /* VPR --Cursor <n> Down */
1926 DEFAULT(csiescseq.arg[0], 1);
1927 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1928 break;
1929 case 'i': /* MC -- Media Copy */
1930 switch(csiescseq.arg[0]) {
1931 case 0:
1932 tdump();
1933 break;
1934 case 1:
1935 tdumpline(term.c.y);
1936 break;
1937 case 2:
1938 tdumpsel();
1939 break;
1940 case 4:
1941 term.mode &= ~MODE_PRINT;
1942 break;
1943 case 5:
1944 term.mode |= MODE_PRINT;
1945 break;
1946 }
1947 break;
1948 case 'c': /* DA -- Device Attributes */
1949 if(csiescseq.arg[0] == 0)
1950 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1951 break;
1952 case 'C': /* CUF -- Cursor <n> Forward */
1953 case 'a': /* HPR -- Cursor <n> Forward */
1954 DEFAULT(csiescseq.arg[0], 1);
1955 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1956 break;
1957 case 'D': /* CUB -- Cursor <n> Backward */
1958 DEFAULT(csiescseq.arg[0], 1);
1959 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1960 break;
1961 case 'E': /* CNL -- Cursor <n> Down and first col */
1962 DEFAULT(csiescseq.arg[0], 1);
1963 tmoveto(0, term.c.y+csiescseq.arg[0]);
1964 break;
1965 case 'F': /* CPL -- Cursor <n> Up and first col */
1966 DEFAULT(csiescseq.arg[0], 1);
1967 tmoveto(0, term.c.y-csiescseq.arg[0]);
1968 break;
1969 case 'g': /* TBC -- Tabulation clear */
1970 switch(csiescseq.arg[0]) {
1971 case 0: /* clear current tab stop */
1972 term.tabs[term.c.x] = 0;
1973 break;
1974 case 3: /* clear all the tabs */
1975 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1976 break;
1977 default:
1978 goto unknown;
1979 }
1980 break;
1981 case 'G': /* CHA -- Move to <col> */
1982 case '`': /* HPA */
1983 DEFAULT(csiescseq.arg[0], 1);
1984 tmoveto(csiescseq.arg[0]-1, term.c.y);
1985 break;
1986 case 'H': /* CUP -- Move to <row> <col> */
1987 case 'f': /* HVP */
1988 DEFAULT(csiescseq.arg[0], 1);
1989 DEFAULT(csiescseq.arg[1], 1);
1990 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1991 break;
1992 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1993 DEFAULT(csiescseq.arg[0], 1);
1994 tputtab(csiescseq.arg[0]);
1995 break;
1996 case 'J': /* ED -- Clear screen */
1997 selclear(NULL);
1998 switch(csiescseq.arg[0]) {
1999 case 0: /* below */
2000 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2001 if(term.c.y < term.row-1) {
2002 tclearregion(0, term.c.y+1, term.col-1,
2003 term.row-1);
2004 }
2005 break;
2006 case 1: /* above */
2007 if(term.c.y > 1)
2008 tclearregion(0, 0, term.col-1, term.c.y-1);
2009 tclearregion(0, term.c.y, term.c.x, term.c.y);
2010 break;
2011 case 2: /* all */
2012 tclearregion(0, 0, term.col-1, term.row-1);
2013 break;
2014 default:
2015 goto unknown;
2016 }
2017 break;
2018 case 'K': /* EL -- Clear line */
2019 switch(csiescseq.arg[0]) {
2020 case 0: /* right */
2021 tclearregion(term.c.x, term.c.y, term.col-1,
2022 term.c.y);
2023 break;
2024 case 1: /* left */
2025 tclearregion(0, term.c.y, term.c.x, term.c.y);
2026 break;
2027 case 2: /* all */
2028 tclearregion(0, term.c.y, term.col-1, term.c.y);
2029 break;
2030 }
2031 break;
2032 case 'S': /* SU -- Scroll <n> line up */
2033 DEFAULT(csiescseq.arg[0], 1);
2034 tscrollup(term.top, csiescseq.arg[0]);
2035 break;
2036 case 'T': /* SD -- Scroll <n> line down */
2037 DEFAULT(csiescseq.arg[0], 1);
2038 tscrolldown(term.top, csiescseq.arg[0]);
2039 break;
2040 case 'L': /* IL -- Insert <n> blank lines */
2041 DEFAULT(csiescseq.arg[0], 1);
2042 tinsertblankline(csiescseq.arg[0]);
2043 break;
2044 case 'l': /* RM -- Reset Mode */
2045 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2046 break;
2047 case 'M': /* DL -- Delete <n> lines */
2048 DEFAULT(csiescseq.arg[0], 1);
2049 tdeleteline(csiescseq.arg[0]);
2050 break;
2051 case 'X': /* ECH -- Erase <n> char */
2052 DEFAULT(csiescseq.arg[0], 1);
2053 tclearregion(term.c.x, term.c.y,
2054 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2055 break;
2056 case 'P': /* DCH -- Delete <n> char */
2057 DEFAULT(csiescseq.arg[0], 1);
2058 tdeletechar(csiescseq.arg[0]);
2059 break;
2060 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2061 DEFAULT(csiescseq.arg[0], 1);
2062 tputtab(-csiescseq.arg[0]);
2063 break;
2064 case 'd': /* VPA -- Move to <row> */
2065 DEFAULT(csiescseq.arg[0], 1);
2066 tmoveato(term.c.x, csiescseq.arg[0]-1);
2067 break;
2068 case 'h': /* SM -- Set terminal mode */
2069 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2070 break;
2071 case 'm': /* SGR -- Terminal attribute (color) */
2072 tsetattr(csiescseq.arg, csiescseq.narg);
2073 break;
2074 case 'n': /* DSR – Device Status Report (cursor position) */
2075 if (csiescseq.arg[0] == 6) {
2076 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2077 term.c.y+1, term.c.x+1);
2078 ttywrite(buf, len);
2079 }
2080 break;
2081 case 'r': /* DECSTBM -- Set Scrolling Region */
2082 if(csiescseq.priv) {
2083 goto unknown;
2084 } else {
2085 DEFAULT(csiescseq.arg[0], 1);
2086 DEFAULT(csiescseq.arg[1], term.row);
2087 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2088 tmoveato(0, 0);
2089 }
2090 break;
2091 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2092 tcursor(CURSOR_SAVE);
2093 break;
2094 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2095 tcursor(CURSOR_LOAD);
2096 break;
2097 }
2098 }
2099
2100 void
2101 csidump(void) {
2102 int i;
2103 uint c;
2104
2105 printf("ESC[");
2106 for(i = 0; i < csiescseq.len; i++) {
2107 c = csiescseq.buf[i] & 0xff;
2108 if(isprint(c)) {
2109 putchar(c);
2110 } else if(c == '\n') {
2111 printf("(\\n)");
2112 } else if(c == '\r') {
2113 printf("(\\r)");
2114 } else if(c == 0x1b) {
2115 printf("(\\e)");
2116 } else {
2117 printf("(%02x)", c);
2118 }
2119 }
2120 putchar('\n');
2121 }
2122
2123 void
2124 csireset(void) {
2125 memset(&csiescseq, 0, sizeof(csiescseq));
2126 }
2127
2128 void
2129 strhandle(void) {
2130 char *p = NULL;
2131 int j, narg, par;
2132
2133 term.esc &= ~(ESC_STR_END|ESC_STR);
2134 strparse();
2135 narg = strescseq.narg;
2136 par = atoi(strescseq.args[0]);
2137
2138 switch(strescseq.type) {
2139 case ']': /* OSC -- Operating System Command */
2140 switch(par) {
2141 case 0:
2142 case 1:
2143 case 2:
2144 if(narg > 1)
2145 xsettitle(strescseq.args[1]);
2146 return;
2147 case 4: /* color set */
2148 if(narg < 3)
2149 break;
2150 p = strescseq.args[2];
2151 /* FALLTHROUGH */
2152 case 104: /* color reset, here p = NULL */
2153 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2154 if (!xsetcolorname(j, p)) {
2155 fprintf(stderr, "erresc: invalid color %s\n", p);
2156 } else {
2157 /*
2158 * TODO if defaultbg color is changed, borders
2159 * are dirty
2160 */
2161 redraw(0);
2162 }
2163 return;
2164 }
2165 break;
2166 case 'k': /* old title set compatibility */
2167 xsettitle(strescseq.args[0]);
2168 return;
2169 case 'P': /* DCS -- Device Control String */
2170 case '_': /* APC -- Application Program Command */
2171 case '^': /* PM -- Privacy Message */
2172 return;
2173 }
2174
2175 fprintf(stderr, "erresc: unknown str ");
2176 strdump();
2177 }
2178
2179 void
2180 strparse(void) {
2181 char *p = strescseq.buf;
2182
2183 strescseq.narg = 0;
2184 strescseq.buf[strescseq.len] = '\0';
2185 while(p && strescseq.narg < STR_ARG_SIZ)
2186 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2187 }
2188
2189 void
2190 strdump(void) {
2191 int i;
2192 uint c;
2193
2194 printf("ESC%c", strescseq.type);
2195 for(i = 0; i < strescseq.len; i++) {
2196 c = strescseq.buf[i] & 0xff;
2197 if(c == '\0') {
2198 return;
2199 } else if(isprint(c)) {
2200 putchar(c);
2201 } else if(c == '\n') {
2202 printf("(\\n)");
2203 } else if(c == '\r') {
2204 printf("(\\r)");
2205 } else if(c == 0x1b) {
2206 printf("(\\e)");
2207 } else {
2208 printf("(%02x)", c);
2209 }
2210 }
2211 printf("ESC\\\n");
2212 }
2213
2214 void
2215 strreset(void) {
2216 memset(&strescseq, 0, sizeof(strescseq));
2217 }
2218
2219 void
2220 tprinter(char *s, size_t len) {
2221 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2222 fprintf(stderr, "Error writing in %s:%s\n",
2223 opt_io, strerror(errno));
2224 close(iofd);
2225 iofd = -1;
2226 }
2227 }
2228
2229 void
2230 toggleprinter(const Arg *arg) {
2231 term.mode ^= MODE_PRINT;
2232 }
2233
2234 void
2235 printscreen(const Arg *arg) {
2236 tdump();
2237 }
2238
2239 void
2240 printsel(const Arg *arg) {
2241 tdumpsel();
2242 }
2243
2244 void
2245 tdumpsel(void) {
2246 char *ptr;
2247
2248 if((ptr = getsel())) {
2249 tprinter(ptr, strlen(ptr));
2250 free(ptr);
2251 }
2252 }
2253
2254 void
2255 tdumpline(int n) {
2256 Glyph *bp, *end;
2257
2258 bp = &term.line[n][0];
2259 end = &bp[term.col-1];
2260 while(end > bp && !strcmp(" ", end->c))
2261 --end;
2262 if(bp != end || strcmp(bp->c, " ")) {
2263 for( ;bp <= end; ++bp)
2264 tprinter(bp->c, strlen(bp->c));
2265 }
2266 tprinter("\n", 1);
2267 }
2268
2269 void
2270 tdump(void) {
2271 int i;
2272
2273 for(i = 0; i < term.row; ++i)
2274 tdumpline(i);
2275 }
2276
2277 void
2278 tputtab(int n) {
2279 uint x = term.c.x;
2280
2281 if(n > 0) {
2282 while(x < term.col && n--)
2283 for(++x; x < term.col && !term.tabs[x]; ++x)
2284 /* nothing */ ;
2285 } else if(n < 0) {
2286 while(x > 0 && n++)
2287 for(--x; x > 0 && !term.tabs[x]; --x)
2288 /* nothing */ ;
2289 }
2290 tmoveto(x, term.c.y);
2291 }
2292
2293 void
2294 techo(char *buf, int len) {
2295 for(; len > 0; buf++, len--) {
2296 char c = *buf;
2297
2298 if(ISCONTROL(c)) { /* control code */
2299 if(c & 0x80) {
2300 c &= 0x7f;
2301 tputc("^", 1);
2302 tputc("[", 1);
2303 } else if(c != '\n' && c != '\r' && c != '\t') {
2304 c ^= '\x40';
2305 tputc("^", 1);
2306 }
2307 tputc(&c, 1);
2308 } else {
2309 break;
2310 }
2311 }
2312 if(len)
2313 tputc(buf, len);
2314 }
2315
2316 void
2317 tdeftran(char ascii) {
2318 char c, (*bp)[2];
2319 static char tbl[][2] = {
2320 {'0', CS_GRAPHIC0}, {'B', CS_USA},
2321 {0, 0}
2322 };
2323
2324 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2325 /* nothing */;
2326
2327 if (c == 0)
2328 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2329 else
2330 term.trantbl[term.icharset] = (*bp)[1];
2331 }
2332
2333 void
2334 tcontrolcode(uchar ascii) {
2335 static char question[UTF_SIZ] = "?";
2336
2337 switch(ascii) {
2338 case '\t': /* HT */
2339 tputtab(1);
2340 return;
2341 case '\b': /* BS */
2342 tmoveto(term.c.x-1, term.c.y);
2343 return;
2344 case '\r': /* CR */
2345 tmoveto(0, term.c.y);
2346 return;
2347 case '\f': /* LF */
2348 case '\v': /* VT */
2349 case '\n': /* LF */
2350 /* go to first col if the mode is set */
2351 tnewline(IS_SET(MODE_CRLF));
2352 return;
2353 case '\a': /* BEL */
2354 if(term.esc & ESC_STR_END) {
2355 /* backwards compatibility to xterm */
2356 strhandle();
2357 } else {
2358 if(!(xw.state & WIN_FOCUSED))
2359 xseturgency(1);
2360 if (bellvolume)
2361 XBell(xw.dpy, bellvolume);
2362 }
2363 break;
2364 case '\033': /* ESC */
2365 csireset();
2366 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2367 term.esc |= ESC_START;
2368 return;
2369 case '\016': /* SO */
2370 term.charset = 0;
2371 return;
2372 case '\017': /* SI */
2373 term.charset = 1;
2374 return;
2375 case '\032': /* SUB */
2376 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2377 case '\030': /* CAN */
2378 csireset();
2379 break;
2380 case '\005': /* ENQ (IGNORED) */
2381 case '\000': /* NUL (IGNORED) */
2382 case '\021': /* XON (IGNORED) */
2383 case '\023': /* XOFF (IGNORED) */
2384 case 0177: /* DEL (IGNORED) */
2385 return;
2386 case 0x84: /* TODO: IND */
2387 case 0x85: /* TODO: NEL */
2388 case 0x88: /* TODO: HTS */
2389 case 0x8d: /* TODO: RI */
2390 case 0x8e: /* TODO: SS2 */
2391 case 0x8f: /* TODO: SS3 */
2392 case 0x90: /* TODO: DCS */
2393 case 0x98: /* TODO: SOS */
2394 case 0x9a: /* TODO: DECID */
2395 case 0x9b: /* TODO: CSI */
2396 case 0x9c: /* TODO: ST */
2397 case 0x9d: /* TODO: OSC */
2398 case 0x9e: /* TODO: PM */
2399 case 0x9f: /* TODO: APC */
2400 break;
2401 }
2402 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2403 term.esc &= ~(ESC_STR_END|ESC_STR);
2404 return;
2405 }
2406
2407 void
2408 tdectest(char c) {
2409 static char E[UTF_SIZ] = "E";
2410 int x, y;
2411
2412 if(c == '8') { /* DEC screen alignment test. */
2413 for(x = 0; x < term.col; ++x) {
2414 for(y = 0; y < term.row; ++y)
2415 tsetchar(E, &term.c.attr, x, y);
2416 }
2417 }
2418 }
2419
2420 void
2421 tputc(char *c, int len) {
2422 uchar ascii;
2423 bool control;
2424 long unicodep;
2425 int width;
2426 Glyph *gp;
2427
2428 if(len == 1) {
2429 width = 1;
2430 unicodep = ascii = *c;
2431 } else {
2432 utf8decode(c, &unicodep, UTF_SIZ);
2433 width = wcwidth(unicodep);
2434 control = ISCONTROLC1(unicodep);
2435 ascii = unicodep;
2436 }
2437
2438 if(IS_SET(MODE_PRINT))
2439 tprinter(c, len);
2440 control = ISCONTROL(unicodep);
2441
2442 /*
2443 * STR sequence must be checked before anything else
2444 * because it uses all following characters until it
2445 * receives a ESC, a SUB, a ST or any other C1 control
2446 * character.
2447 */
2448 if(term.esc & ESC_STR) {
2449 if(width == 1 &&
2450 (ascii == '\a' || ascii == 030 ||
2451 ascii == 032 || ascii == 033 ||
2452 ISCONTROLC1(unicodep))) {
2453 term.esc &= ~(ESC_START|ESC_STR);
2454 term.esc |= ESC_STR_END;
2455 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2456 memmove(&strescseq.buf[strescseq.len], c, len);
2457 strescseq.len += len;
2458 return;
2459 } else {
2460 /*
2461 * Here is a bug in terminals. If the user never sends
2462 * some code to stop the str or esc command, then st
2463 * will stop responding. But this is better than
2464 * silently failing with unknown characters. At least
2465 * then users will report back.
2466 *
2467 * In the case users ever get fixed, here is the code:
2468 */
2469 /*
2470 * term.esc = 0;
2471 * strhandle();
2472 */
2473 return;
2474 }
2475 }
2476
2477 /*
2478 * Actions of control codes must be performed as soon they arrive
2479 * because they can be embedded inside a control sequence, and
2480 * they must not cause conflicts with sequences.
2481 */
2482 if(control) {
2483 tcontrolcode(ascii);
2484 /*
2485 * control codes are not shown ever
2486 */
2487 return;
2488 } else if(term.esc & ESC_START) {
2489 if(term.esc & ESC_CSI) {
2490 csiescseq.buf[csiescseq.len++] = ascii;
2491 if(BETWEEN(ascii, 0x40, 0x7E)
2492 || csiescseq.len >= \
2493 sizeof(csiescseq.buf)-1) {
2494 term.esc = 0;
2495 csiparse();
2496 csihandle();
2497 }
2498 return;
2499 } else if(term.esc & ESC_ALTCHARSET) {
2500 tdeftran(ascii);
2501 } else if(term.esc & ESC_TEST) {
2502 tdectest(ascii);
2503 } else {
2504 switch(ascii) {
2505 case '[':
2506 term.esc |= ESC_CSI;
2507 return;
2508 case '#':
2509 term.esc |= ESC_TEST;
2510 return;
2511 case 'P': /* DCS -- Device Control String */
2512 case '_': /* APC -- Application Program Command */
2513 case '^': /* PM -- Privacy Message */
2514 case ']': /* OSC -- Operating System Command */
2515 case 'k': /* old title set compatibility */
2516 strreset();
2517 strescseq.type = ascii;
2518 term.esc |= ESC_STR;
2519 return;
2520 case '(': /* set primary charset G0 */
2521 case ')': /* set secondary charset G1 */
2522 case '*': /* set tertiary charset G2 */
2523 case '+': /* set quaternary charset G3 */
2524 term.icharset = ascii - '(';
2525 term.esc |= ESC_ALTCHARSET;
2526 return;
2527 case 'D': /* IND -- Linefeed */
2528 if(term.c.y == term.bot) {
2529 tscrollup(term.top, 1);
2530 } else {
2531 tmoveto(term.c.x, term.c.y+1);
2532 }
2533 break;
2534 case 'E': /* NEL -- Next line */
2535 tnewline(1); /* always go to first col */
2536 break;
2537 case 'H': /* HTS -- Horizontal tab stop */
2538 term.tabs[term.c.x] = 1;
2539 break;
2540 case 'M': /* RI -- Reverse index */
2541 if(term.c.y == term.top) {
2542 tscrolldown(term.top, 1);
2543 } else {
2544 tmoveto(term.c.x, term.c.y-1);
2545 }
2546 break;
2547 case 'Z': /* DECID -- Identify Terminal */
2548 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2549 break;
2550 case 'c': /* RIS -- Reset to inital state */
2551 treset();
2552 xresettitle();
2553 xloadcols();
2554 break;
2555 case '=': /* DECPAM -- Application keypad */
2556 term.mode |= MODE_APPKEYPAD;
2557 break;
2558 case '>': /* DECPNM -- Normal keypad */
2559 term.mode &= ~MODE_APPKEYPAD;
2560 break;
2561 case '7': /* DECSC -- Save Cursor */
2562 tcursor(CURSOR_SAVE);
2563 break;
2564 case '8': /* DECRC -- Restore Cursor */
2565 tcursor(CURSOR_LOAD);
2566 break;
2567 case '\\': /* ST -- String Terminator */
2568 if(term.esc & ESC_STR_END)
2569 strhandle();
2570 break;
2571 default:
2572 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2573 (uchar) ascii, isprint(ascii)? ascii:'.');
2574 break;
2575 }
2576 }
2577 term.esc = 0;
2578 /*
2579 * All characters which form part of a sequence are not
2580 * printed
2581 */
2582 return;
2583 }
2584 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2585 selclear(NULL);
2586
2587 gp = &term.line[term.c.y][term.c.x];
2588 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2589 gp->mode |= ATTR_WRAP;
2590 tnewline(1);
2591 }
2592
2593 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2594 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2595
2596 if(term.c.x+width > term.col)
2597 tnewline(1);
2598
2599 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2600
2601 if(width == 2) {
2602 gp->mode |= ATTR_WIDE;
2603 if(term.c.x+1 < term.col) {
2604 gp[1].c[0] = '\0';
2605 gp[1].mode = ATTR_WDUMMY;
2606 }
2607 }
2608 if(term.c.x+width < term.col) {
2609 tmoveto(term.c.x+width, term.c.y);
2610 } else {
2611 term.c.state |= CURSOR_WRAPNEXT;
2612 }
2613 }
2614
2615 int
2616 tresize(int col, int row) {
2617 int i;
2618 int minrow = MIN(row, term.row);
2619 int mincol = MIN(col, term.col);
2620 int slide = term.c.y - row + 1;
2621 bool *bp;
2622 Line *orig;
2623 TCursor c;
2624
2625 if(col < 1 || row < 1)
2626 return 0;
2627
2628 /* free unneeded rows */
2629 i = 0;
2630 if(slide > 0) {
2631 /*
2632 * slide screen to keep cursor where we expect it -
2633 * tscrollup would work here, but we can optimize to
2634 * memmove because we're freeing the earlier lines
2635 */
2636 for(/* i = 0 */; i < slide; i++) {
2637 free(term.line[i]);
2638 free(term.alt[i]);
2639 }
2640 memmove(term.line, term.line + slide, row * sizeof(Line));
2641 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2642 }
2643 for(i += row; i < term.row; i++) {
2644 free(term.line[i]);
2645 free(term.alt[i]);
2646 }
2647
2648 /* resize to new height */
2649 term.line = xrealloc(term.line, row * sizeof(Line));
2650 term.alt = xrealloc(term.alt, row * sizeof(Line));
2651 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2652 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2653
2654 /* resize each row to new width, zero-pad if needed */
2655 for(i = 0; i < minrow; i++) {
2656 term.dirty[i] = 1;
2657 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2658 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2659 }
2660
2661 /* allocate any new rows */
2662 for(/* i == minrow */; i < row; i++) {
2663 term.dirty[i] = 1;
2664 term.line[i] = xmalloc(col * sizeof(Glyph));
2665 term.alt[i] = xmalloc(col * sizeof(Glyph));
2666 }
2667 if(col > term.col) {
2668 bp = term.tabs + term.col;
2669
2670 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2671 while(--bp > term.tabs && !*bp)
2672 /* nothing */ ;
2673 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2674 *bp = 1;
2675 }
2676 /* update terminal size */
2677 term.col = col;
2678 term.row = row;
2679 /* reset scrolling region */
2680 tsetscroll(0, row-1);
2681 /* make use of the LIMIT in tmoveto */
2682 tmoveto(term.c.x, term.c.y);
2683 /* Clearing both screens */
2684 orig = term.line;
2685 c = term.c;
2686 do {
2687 if(mincol < col && 0 < minrow) {
2688 tclearregion(mincol, 0, col - 1, minrow - 1);
2689 }
2690 if(0 < col && minrow < row) {
2691 tclearregion(0, minrow, col - 1, row - 1);
2692 }
2693 tswapscreen();
2694 tcursor(CURSOR_LOAD);
2695 } while(orig != term.line);
2696 term.c = c;
2697
2698 return (slide > 0);
2699 }
2700
2701 void
2702 xresize(int col, int row) {
2703 xw.tw = MAX(1, col * xw.cw);
2704 xw.th = MAX(1, row * xw.ch);
2705
2706 XFreePixmap(xw.dpy, xw.buf);
2707 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2708 DefaultDepth(xw.dpy, xw.scr));
2709 XftDrawChange(xw.draw, xw.buf);
2710 xclear(0, 0, xw.w, xw.h);
2711 }
2712
2713 static inline ushort
2714 sixd_to_16bit(int x) {
2715 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2716 }
2717
2718 void
2719 xloadcols(void) {
2720 int i;
2721 XRenderColor color = { .alpha = 0xffff };
2722 static bool loaded;
2723 Colour *cp;
2724
2725 if(loaded) {
2726 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2727 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2728 }
2729
2730 /* load colours [0-15] and [256-LEN(colorname)] (config.h) */
2731 for(i = 0; i < LEN(colorname); i++) {
2732 if(!colorname[i])
2733 continue;
2734 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2735 die("Could not allocate color '%s'\n", colorname[i]);
2736 }
2737 }
2738
2739 /* load colours [16-231] ; same colours as xterm */
2740 for(i = 16; i < 6*6*6+16; i++) {
2741 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2742 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2743 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2744 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2745 die("Could not allocate color %d\n", i);
2746 }
2747
2748 /* load colours [232-255] ; grayscale */
2749 for(; i < 256; i++) {
2750 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2751 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2752 die("Could not allocate color %d\n", i);
2753 }
2754 loaded = true;
2755 }
2756
2757 int
2758 xsetcolorname(int x, const char *name) {
2759 XRenderColor color = { .alpha = 0xffff };
2760
2761 if(!BETWEEN(x, 0, LEN(colorname)))
2762 return -1;
2763 if(!name) {
2764 if(BETWEEN(x, 16, 6*6*6+16)) { /* 256 colour */
2765 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2766 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2767 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2768 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[x]))
2769 die("Could not allocate color %d\n", x);
2770 return 1;
2771 } else if(BETWEEN(x, 6*6*6+16, 255)) { /* grayscale */
2772 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x-(6*6*6+16));
2773 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[x]))
2774 die("Could not allocate color %d\n", x);
2775 return 1;
2776 } else { /* system colours */
2777 name = colorname[x];
2778 }
2779 }
2780 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &dc.col[x]))
2781 return 0; /* invalid name */
2782 return 1;
2783 }
2784
2785 void
2786 xtermclear(int col1, int row1, int col2, int row2) {
2787 XftDrawRect(xw.draw,
2788 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2789 borderpx + col1 * xw.cw,
2790 borderpx + row1 * xw.ch,
2791 (col2-col1+1) * xw.cw,
2792 (row2-row1+1) * xw.ch);
2793 }
2794
2795 /*
2796 * Absolute coordinates.
2797 */
2798 void
2799 xclear(int x1, int y1, int x2, int y2) {
2800 XftDrawRect(xw.draw,
2801 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2802 x1, y1, x2-x1, y2-y1);
2803 }
2804
2805 void
2806 xhints(void) {
2807 XClassHint class = {opt_class ? opt_class : termname, termname};
2808 XWMHints wm = {.flags = InputHint, .input = 1};
2809 XSizeHints *sizeh = NULL;
2810
2811 sizeh = XAllocSizeHints();
2812
2813 sizeh->flags = PSize | PResizeInc | PBaseSize;
2814 sizeh->height = xw.h;
2815 sizeh->width = xw.w;
2816 sizeh->height_inc = xw.ch;
2817 sizeh->width_inc = xw.cw;
2818 sizeh->base_height = 2 * borderpx;
2819 sizeh->base_width = 2 * borderpx;
2820 if(xw.isfixed == True) {
2821 sizeh->flags |= PMaxSize | PMinSize;
2822 sizeh->min_width = sizeh->max_width = xw.w;
2823 sizeh->min_height = sizeh->max_height = xw.h;
2824 }
2825 if(xw.gm & (XValue|YValue)) {
2826 sizeh->flags |= USPosition | PWinGravity;
2827 sizeh->x = xw.l;
2828 sizeh->y = xw.t;
2829 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2830 }
2831
2832 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2833 &class);
2834 XFree(sizeh);
2835 }
2836
2837 int
2838 xgeommasktogravity(int mask) {
2839 switch(mask & (XNegative|YNegative)) {
2840 case 0:
2841 return NorthWestGravity;
2842 case XNegative:
2843 return NorthEastGravity;
2844 case YNegative:
2845 return SouthWestGravity;
2846 }
2847 return SouthEastGravity;
2848 }
2849
2850 int
2851 xloadfont(Font *f, FcPattern *pattern) {
2852 FcPattern *match;
2853 FcResult result;
2854
2855 match = FcFontMatch(NULL, pattern, &result);
2856 if(!match)
2857 return 1;
2858
2859 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2860 FcPatternDestroy(match);
2861 return 1;
2862 }
2863
2864 f->set = NULL;
2865 f->pattern = FcPatternDuplicate(pattern);
2866
2867 f->ascent = f->match->ascent;
2868 f->descent = f->match->descent;
2869 f->lbearing = 0;
2870 f->rbearing = f->match->max_advance_width;
2871
2872 f->height = f->ascent + f->descent;
2873 f->width = f->lbearing + f->rbearing;
2874
2875 return 0;
2876 }
2877
2878 void
2879 xloadfonts(char *fontstr, double fontsize) {
2880 FcPattern *pattern;
2881 FcResult r_sz, r_psz;
2882 double fontval;
2883
2884 if(fontstr[0] == '-') {
2885 pattern = XftXlfdParse(fontstr, False, False);
2886 } else {
2887 pattern = FcNameParse((FcChar8 *)fontstr);
2888 }
2889
2890 if(!pattern)
2891 die("st: can't open font %s\n", fontstr);
2892
2893 if(fontsize > 0) {
2894 FcPatternDel(pattern, FC_PIXEL_SIZE);
2895 FcPatternDel(pattern, FC_SIZE);
2896 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2897 usedfontsize = fontsize;
2898 } else {
2899 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2900 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2901 if(r_psz == FcResultMatch) {
2902 usedfontsize = fontval;
2903 } else if(r_sz == FcResultMatch) {
2904 usedfontsize = -1;
2905 } else {
2906 /*
2907 * Default font size is 12, if none given. This is to
2908 * have a known usedfontsize value.
2909 */
2910 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2911 usedfontsize = 12;
2912 }
2913 }
2914
2915 FcConfigSubstitute(0, pattern, FcMatchPattern);
2916 FcDefaultSubstitute(pattern);
2917
2918 if(xloadfont(&dc.font, pattern))
2919 die("st: can't open font %s\n", fontstr);
2920
2921 if(usedfontsize < 0) {
2922 FcPatternGetDouble(dc.font.match->pattern,
2923 FC_PIXEL_SIZE, 0, &fontval);
2924 usedfontsize = fontval;
2925 }
2926
2927 /* Setting character width and height. */
2928 xw.cw = CEIL(dc.font.width * cwscale);
2929 xw.ch = CEIL(dc.font.height * chscale);
2930
2931 FcPatternDel(pattern, FC_SLANT);
2932 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2933 if(xloadfont(&dc.ifont, pattern))
2934 die("st: can't open font %s\n", fontstr);
2935
2936 FcPatternDel(pattern, FC_WEIGHT);
2937 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2938 if(xloadfont(&dc.ibfont, pattern))
2939 die("st: can't open font %s\n", fontstr);
2940
2941 FcPatternDel(pattern, FC_SLANT);
2942 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2943 if(xloadfont(&dc.bfont, pattern))
2944 die("st: can't open font %s\n", fontstr);
2945
2946 FcPatternDestroy(pattern);
2947 }
2948
2949 int
2950 xloadfontset(Font *f) {
2951 FcResult result;
2952
2953 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2954 return 1;
2955 return 0;
2956 }
2957
2958 void
2959 xunloadfont(Font *f) {
2960 XftFontClose(xw.dpy, f->match);
2961 FcPatternDestroy(f->pattern);
2962 if(f->set)
2963 FcFontSetDestroy(f->set);
2964 }
2965
2966 void
2967 xunloadfonts(void) {
2968 /* Free the loaded fonts in the font cache. */
2969 while(frclen > 0)
2970 XftFontClose(xw.dpy, frc[--frclen].font);
2971
2972 xunloadfont(&dc.font);
2973 xunloadfont(&dc.bfont);
2974 xunloadfont(&dc.ifont);
2975 xunloadfont(&dc.ibfont);
2976 }
2977
2978 void
2979 xzoom(const Arg *arg) {
2980 xunloadfonts();
2981 xloadfonts(usedfont, usedfontsize + arg->i);
2982 cresize(0, 0);
2983 redraw(0);
2984 }
2985
2986 void
2987 xinit(void) {
2988 XGCValues gcvalues;
2989 Cursor cursor;
2990 Window parent;
2991 pid_t thispid = getpid();
2992
2993 if(!(xw.dpy = XOpenDisplay(NULL)))
2994 die("Can't open display\n");
2995 xw.scr = XDefaultScreen(xw.dpy);
2996 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2997
2998 /* font */
2999 if(!FcInit())
3000 die("Could not init fontconfig.\n");
3001
3002 usedfont = (opt_font == NULL)? font : opt_font;
3003 xloadfonts(usedfont, 0);
3004
3005 /* colors */
3006 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3007 xloadcols();
3008
3009 /* adjust fixed window geometry */
3010 xw.w = 2 * borderpx + term.col * xw.cw;
3011 xw.h = 2 * borderpx + term.row * xw.ch;
3012 if(xw.gm & XNegative)
3013 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3014 if(xw.gm & YNegative)
3015 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3016
3017 /* Events */
3018 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3019 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3020 xw.attrs.bit_gravity = NorthWestGravity;
3021 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3022 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3023 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3024 xw.attrs.colormap = xw.cmap;
3025
3026 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3027 XRootWindow(xw.dpy, xw.scr);
3028 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3029 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3030 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3031 | CWEventMask | CWColormap, &xw.attrs);
3032
3033 memset(&gcvalues, 0, sizeof(gcvalues));
3034 gcvalues.graphics_exposures = False;
3035 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3036 &gcvalues);
3037 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3038 DefaultDepth(xw.dpy, xw.scr));
3039 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3040 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3041
3042 /* Xft rendering context */
3043 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3044
3045 /* input methods */
3046 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3047 XSetLocaleModifiers("@im=local");
3048 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3049 XSetLocaleModifiers("@im=");
3050 if((xw.xim = XOpenIM(xw.dpy,
3051 NULL, NULL, NULL)) == NULL) {
3052 die("XOpenIM failed. Could not open input"
3053 " device.\n");
3054 }
3055 }
3056 }
3057 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3058 | XIMStatusNothing, XNClientWindow, xw.win,
3059 XNFocusWindow, xw.win, NULL);
3060 if(xw.xic == NULL)
3061 die("XCreateIC failed. Could not obtain input method.\n");
3062
3063 /* white cursor, black outline */
3064 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3065 XDefineCursor(xw.dpy, xw.win, cursor);
3066 XRecolorCursor(xw.dpy, cursor,
3067 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3068 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3069
3070 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3071 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3072 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3073 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3074
3075 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3076 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3077 PropModeReplace, (uchar *)&thispid, 1);
3078
3079 xresettitle();
3080 XMapWindow(xw.dpy, xw.win);
3081 xhints();
3082 XSync(xw.dpy, False);
3083 }
3084
3085 void
3086 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3087 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3088 width = charlen * xw.cw, xp, i;
3089 int frcflags;
3090 int u8fl, u8fblen, u8cblen, doesexist;
3091 char *u8c, *u8fs;
3092 long unicodep;
3093 Font *font = &dc.font;
3094 FcResult fcres;
3095 FcPattern *fcpattern, *fontpattern;
3096 FcFontSet *fcsets[] = { NULL };
3097 FcCharSet *fccharset;
3098 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3099 XRenderColor colfg, colbg;
3100 XRectangle r;
3101 int oneatatime;
3102
3103 frcflags = FRC_NORMAL;
3104
3105 if(base.mode & ATTR_ITALIC) {
3106 if(base.fg == defaultfg)
3107 base.fg = defaultitalic;
3108 font = &dc.ifont;
3109 frcflags = FRC_ITALIC;
3110 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3111 if(base.fg == defaultfg)
3112 base.fg = defaultitalic;
3113 font = &dc.ibfont;
3114 frcflags = FRC_ITALICBOLD;
3115 } else if(base.mode & ATTR_UNDERLINE) {
3116 if(base.fg == defaultfg)
3117 base.fg = defaultunderline;
3118 }
3119
3120 if(IS_TRUECOL(base.fg)) {
3121 colfg.alpha = 0xffff;
3122 colfg.red = TRUERED(base.fg);
3123 colfg.green = TRUEGREEN(base.fg);
3124 colfg.blue = TRUEBLUE(base.fg);
3125 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3126 fg = &truefg;
3127 } else {
3128 fg = &dc.col[base.fg];
3129 }
3130
3131 if(IS_TRUECOL(base.bg)) {
3132 colbg.alpha = 0xffff;
3133 colbg.green = TRUEGREEN(base.bg);
3134 colbg.red = TRUERED(base.bg);
3135 colbg.blue = TRUEBLUE(base.bg);
3136 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3137 bg = &truebg;
3138 } else {
3139 bg = &dc.col[base.bg];
3140 }
3141
3142 if(base.mode & ATTR_BOLD) {
3143 /*
3144 * change basic system colours [0-7]
3145 * to bright system colours [8-15]
3146 */
3147 if(BETWEEN(base.fg, 0, 7))
3148 fg = &dc.col[base.fg + 8];
3149
3150 if(base.mode & ATTR_ITALIC) {
3151 font = &dc.ibfont;
3152 frcflags = FRC_ITALICBOLD;
3153 } else {
3154 font = &dc.bfont;
3155 frcflags = FRC_BOLD;
3156 }
3157 }
3158
3159 if(IS_SET(MODE_REVERSE)) {
3160 if(fg == &dc.col[defaultfg]) {
3161 fg = &dc.col[defaultbg];
3162 } else {
3163 colfg.red = ~fg->color.red;
3164 colfg.green = ~fg->color.green;
3165 colfg.blue = ~fg->color.blue;
3166 colfg.alpha = fg->color.alpha;
3167 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3168 &revfg);
3169 fg = &revfg;
3170 }
3171
3172 if(bg == &dc.col[defaultbg]) {
3173 bg = &dc.col[defaultfg];
3174 } else {
3175 colbg.red = ~bg->color.red;
3176 colbg.green = ~bg->color.green;
3177 colbg.blue = ~bg->color.blue;
3178 colbg.alpha = bg->color.alpha;
3179 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3180 &revbg);
3181 bg = &revbg;
3182 }
3183 }
3184
3185 if(base.mode & ATTR_REVERSE) {
3186 temp = fg;
3187 fg = bg;
3188 bg = temp;
3189 }
3190
3191 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3192 fg = bg;
3193
3194 /* Intelligent cleaning up of the borders. */
3195 if(x == 0) {
3196 xclear(0, (y == 0)? 0 : winy, borderpx,
3197 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3198 }
3199 if(x + charlen >= term.col) {
3200 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3201 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3202 }
3203 if(y == 0)
3204 xclear(winx, 0, winx + width, borderpx);
3205 if(y == term.row-1)
3206 xclear(winx, winy + xw.ch, winx + width, xw.h);
3207
3208 /* Clean up the region we want to draw to. */
3209 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3210
3211 /* Set the clip region because Xft is sometimes dirty. */
3212 r.x = 0;
3213 r.y = 0;
3214 r.height = xw.ch;
3215 r.width = width;
3216 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3217
3218 for(xp = winx; bytelen > 0;) {
3219 /*
3220 * Search for the range in the to be printed string of glyphs
3221 * that are in the main font. Then print that range. If
3222 * some glyph is found that is not in the font, do the
3223 * fallback dance.
3224 */
3225 u8fs = s;
3226 u8fblen = 0;
3227 u8fl = 0;
3228 oneatatime = font->width != xw.cw;
3229 for(;;) {
3230 u8c = s;
3231 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3232 s += u8cblen;
3233 bytelen -= u8cblen;
3234
3235 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3236 if(oneatatime || !doesexist || bytelen <= 0) {
3237 if(oneatatime || bytelen <= 0) {
3238 if(doesexist) {
3239 u8fl++;
3240 u8fblen += u8cblen;
3241 }
3242 }
3243
3244 if(u8fl > 0) {
3245 XftDrawStringUtf8(xw.draw, fg,
3246 font->match, xp,
3247 winy + font->ascent,
3248 (FcChar8 *)u8fs,
3249 u8fblen);
3250 xp += xw.cw * u8fl;
3251
3252 }
3253 break;
3254 }
3255
3256 u8fl++;
3257 u8fblen += u8cblen;
3258 }
3259 if(doesexist) {
3260 if(oneatatime)
3261 continue;
3262 break;
3263 }
3264
3265 /* Search the font cache. */
3266 for(i = 0; i < frclen; i++) {
3267 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3268 && frc[i].flags == frcflags) {
3269 break;
3270 }
3271 }
3272
3273 /* Nothing was found. */
3274 if(i >= frclen) {
3275 if(!font->set)
3276 xloadfontset(font);
3277 fcsets[0] = font->set;
3278
3279 /*
3280 * Nothing was found in the cache. Now use
3281 * some dozen of Fontconfig calls to get the
3282 * font for one single character.
3283 *
3284 * Xft and fontconfig are design failures.
3285 */
3286 fcpattern = FcPatternDuplicate(font->pattern);
3287 fccharset = FcCharSetCreate();
3288
3289 FcCharSetAddChar(fccharset, unicodep);
3290 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3291 fccharset);
3292 FcPatternAddBool(fcpattern, FC_SCALABLE,
3293 FcTrue);
3294
3295 FcConfigSubstitute(0, fcpattern,
3296 FcMatchPattern);
3297 FcDefaultSubstitute(fcpattern);
3298
3299 fontpattern = FcFontSetMatch(0, fcsets,
3300 FcTrue, fcpattern, &fcres);
3301
3302 /*
3303 * Overwrite or create the new cache entry.
3304 */
3305 if(frclen >= LEN(frc)) {
3306 frclen = LEN(frc) - 1;
3307 XftFontClose(xw.dpy, frc[frclen].font);
3308 }
3309
3310 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3311 fontpattern);
3312 frc[frclen].flags = frcflags;
3313
3314 i = frclen;
3315 frclen++;
3316
3317 FcPatternDestroy(fcpattern);
3318 FcCharSetDestroy(fccharset);
3319 }
3320
3321 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3322 xp, winy + frc[i].font->ascent,
3323 (FcChar8 *)u8c, u8cblen);
3324
3325 xp += xw.cw * wcwidth(unicodep);
3326 }
3327
3328 /*
3329 * This is how the loop above actually should be. Why does the
3330 * application have to care about font details?
3331 *
3332 * I have to repeat: Xft and Fontconfig are design failures.
3333 */
3334 /*
3335 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3336 winy + font->ascent, (FcChar8 *)s, bytelen);
3337 */
3338
3339 if(base.mode & ATTR_UNDERLINE) {
3340 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3341 width, 1);
3342 }
3343
3344 /* Reset clip to none. */
3345 XftDrawSetClip(xw.draw, 0);
3346 }
3347
3348 void
3349 xdrawcursor(void) {
3350 static int oldx = 0, oldy = 0;
3351 int sl, width, curx;
3352 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3353
3354 LIMIT(oldx, 0, term.col-1);
3355 LIMIT(oldy, 0, term.row-1);
3356
3357 curx = term.c.x;
3358
3359 /* adjust position if in dummy */
3360 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3361 oldx--;
3362 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3363 curx--;
3364
3365 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3366
3367 /* remove the old cursor */
3368 sl = utf8len(term.line[oldy][oldx].c);
3369 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3370 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3371 oldy, width, sl);
3372
3373 /* draw the new one */
3374 if(!(IS_SET(MODE_HIDE))) {
3375 if(xw.state & WIN_FOCUSED) {
3376 if(IS_SET(MODE_REVERSE)) {
3377 g.mode |= ATTR_REVERSE;
3378 g.fg = defaultcs;
3379 g.bg = defaultfg;
3380 }
3381
3382 sl = utf8len(g.c);
3383 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3384 ? 2 : 1;
3385 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3386 } else {
3387 XftDrawRect(xw.draw, &dc.col[defaultcs],
3388 borderpx + curx * xw.cw,
3389 borderpx + term.c.y * xw.ch,
3390 xw.cw - 1, 1);
3391 XftDrawRect(xw.draw, &dc.col[defaultcs],
3392 borderpx + curx * xw.cw,
3393 borderpx + term.c.y * xw.ch,
3394 1, xw.ch - 1);
3395 XftDrawRect(xw.draw, &dc.col[defaultcs],
3396 borderpx + (curx + 1) * xw.cw - 1,
3397 borderpx + term.c.y * xw.ch,
3398 1, xw.ch - 1);
3399 XftDrawRect(xw.draw, &dc.col[defaultcs],
3400 borderpx + curx * xw.cw,
3401 borderpx + (term.c.y + 1) * xw.ch - 1,
3402 xw.cw, 1);
3403 }
3404 oldx = curx, oldy = term.c.y;
3405 }
3406 }
3407
3408
3409 void
3410 xsettitle(char *p) {
3411 XTextProperty prop;
3412
3413 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3414 &prop);
3415 XSetWMName(xw.dpy, xw.win, &prop);
3416 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3417 XFree(prop.value);
3418 }
3419
3420 void
3421 xresettitle(void) {
3422 xsettitle(opt_title ? opt_title : "st");
3423 }
3424
3425 void
3426 redraw(int timeout) {
3427 struct timespec tv = {0, timeout * 1000};
3428
3429 tfulldirt();
3430 draw();
3431
3432 if(timeout > 0) {
3433 nanosleep(&tv, NULL);
3434 XSync(xw.dpy, False); /* necessary for a good tput flash */
3435 }
3436 }
3437
3438 void
3439 draw(void) {
3440 drawregion(0, 0, term.col, term.row);
3441 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3442 xw.h, 0, 0);
3443 XSetForeground(xw.dpy, dc.gc,
3444 dc.col[IS_SET(MODE_REVERSE)?
3445 defaultfg : defaultbg].pixel);
3446 }
3447
3448 void
3449 drawregion(int x1, int y1, int x2, int y2) {
3450 int ic, ib, x, y, ox, sl;
3451 Glyph base, new;
3452 char buf[DRAW_BUF_SIZ];
3453 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3454 long unicodep;
3455
3456 if(!(xw.state & WIN_VISIBLE))
3457 return;
3458
3459 for(y = y1; y < y2; y++) {
3460 if(!term.dirty[y])
3461 continue;
3462
3463 xtermclear(0, y, term.col, y);
3464 term.dirty[y] = 0;
3465 base = term.line[y][0];
3466 ic = ib = ox = 0;
3467 for(x = x1; x < x2; x++) {
3468 new = term.line[y][x];
3469 if(new.mode == ATTR_WDUMMY)
3470 continue;
3471 if(ena_sel && selected(x, y))
3472 new.mode ^= ATTR_REVERSE;
3473 if(ib > 0 && (ATTRCMP(base, new)
3474 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3475 xdraws(buf, base, ox, y, ic, ib);
3476 ic = ib = 0;
3477 }
3478 if(ib == 0) {
3479 ox = x;
3480 base = new;
3481 }
3482
3483 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3484 memcpy(buf+ib, new.c, sl);
3485 ib += sl;
3486 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3487 }
3488 if(ib > 0)
3489 xdraws(buf, base, ox, y, ic, ib);
3490 }
3491 xdrawcursor();
3492 }
3493
3494 void
3495 expose(XEvent *ev) {
3496 XExposeEvent *e = &ev->xexpose;
3497
3498 if(xw.state & WIN_REDRAW) {
3499 if(!e->count)
3500 xw.state &= ~WIN_REDRAW;
3501 }
3502 redraw(0);
3503 }
3504
3505 void
3506 visibility(XEvent *ev) {
3507 XVisibilityEvent *e = &ev->xvisibility;
3508
3509 if(e->state == VisibilityFullyObscured) {
3510 xw.state &= ~WIN_VISIBLE;
3511 } else if(!(xw.state & WIN_VISIBLE)) {
3512 /* need a full redraw for next Expose, not just a buf copy */
3513 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3514 }
3515 }
3516
3517 void
3518 unmap(XEvent *ev) {
3519 xw.state &= ~WIN_VISIBLE;
3520 }
3521
3522 void
3523 xsetpointermotion(int set) {
3524 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3525 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3526 }
3527
3528 void
3529 xseturgency(int add) {
3530 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3531
3532 MODBIT(h->flags, add, XUrgencyHint);
3533 XSetWMHints(xw.dpy, xw.win, h);
3534 XFree(h);
3535 }
3536
3537 void
3538 focus(XEvent *ev) {
3539 XFocusChangeEvent *e = &ev->xfocus;
3540
3541 if(e->mode == NotifyGrab)
3542 return;
3543
3544 if(ev->type == FocusIn) {
3545 XSetICFocus(xw.xic);
3546 xw.state |= WIN_FOCUSED;
3547 xseturgency(0);
3548 if(IS_SET(MODE_FOCUS))
3549 ttywrite("\033[I", 3);
3550 } else {
3551 XUnsetICFocus(xw.xic);
3552 xw.state &= ~WIN_FOCUSED;
3553 if(IS_SET(MODE_FOCUS))
3554 ttywrite("\033[O", 3);
3555 }
3556 }
3557
3558 static inline bool
3559 match(uint mask, uint state) {
3560 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3561 }
3562
3563 void
3564 numlock(const Arg *dummy) {
3565 term.numlock ^= 1;
3566 }
3567
3568 char*
3569 kmap(KeySym k, uint state) {
3570 Key *kp;
3571 int i;
3572
3573 /* Check for mapped keys out of X11 function keys. */
3574 for(i = 0; i < LEN(mappedkeys); i++) {
3575 if(mappedkeys[i] == k)
3576 break;
3577 }
3578 if(i == LEN(mappedkeys)) {
3579 if((k & 0xFFFF) < 0xFD00)
3580 return NULL;
3581 }
3582
3583 for(kp = key; kp < key + LEN(key); kp++) {
3584 if(kp->k != k)
3585 continue;
3586
3587 if(!match(kp->mask, state))
3588 continue;
3589
3590 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3591 continue;
3592 if(term.numlock && kp->appkey == 2)
3593 continue;
3594
3595 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3596 continue;
3597
3598 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3599 continue;
3600
3601 return kp->s;
3602 }
3603
3604 return NULL;
3605 }
3606
3607 void
3608 kpress(XEvent *ev) {
3609 XKeyEvent *e = &ev->xkey;
3610 KeySym ksym;
3611 char buf[32], *customkey;
3612 int len;
3613 long c;
3614 Status status;
3615 Shortcut *bp;
3616
3617 if(IS_SET(MODE_KBDLOCK))
3618 return;
3619
3620 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3621 /* 1. shortcuts */
3622 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3623 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3624 bp->func(&(bp->arg));
3625 return;
3626 }
3627 }
3628
3629 /* 2. custom keys from config.h */
3630 if((customkey = kmap(ksym, e->state))) {
3631 ttysend(customkey, strlen(customkey));
3632 return;
3633 }
3634
3635 /* 3. composed string from input method */
3636 if(len == 0)
3637 return;
3638 if(len == 1 && e->state & Mod1Mask) {
3639 if(IS_SET(MODE_8BIT)) {
3640 if(*buf < 0177) {
3641 c = *buf | 0x80;
3642 len = utf8encode(c, buf, UTF_SIZ);
3643 }
3644 } else {
3645 buf[1] = buf[0];
3646 buf[0] = '\033';
3647 len = 2;
3648 }
3649 }
3650 ttysend(buf, len);
3651 }
3652
3653
3654 void
3655 cmessage(XEvent *e) {
3656 /*
3657 * See xembed specs
3658 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3659 */
3660 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3661 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3662 xw.state |= WIN_FOCUSED;
3663 xseturgency(0);
3664 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3665 xw.state &= ~WIN_FOCUSED;
3666 }
3667 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3668 /* Send SIGHUP to shell */
3669 kill(pid, SIGHUP);
3670 exit(EXIT_SUCCESS);
3671 }
3672 }
3673
3674 void
3675 cresize(int width, int height) {
3676 int col, row;
3677
3678 if(width != 0)
3679 xw.w = width;
3680 if(height != 0)
3681 xw.h = height;
3682
3683 col = (xw.w - 2 * borderpx) / xw.cw;
3684 row = (xw.h - 2 * borderpx) / xw.ch;
3685
3686 tresize(col, row);
3687 xresize(col, row);
3688 ttyresize();
3689 }
3690
3691 void
3692 resize(XEvent *e) {
3693 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3694 return;
3695
3696 cresize(e->xconfigure.width, e->xconfigure.height);
3697 }
3698
3699 void
3700 run(void) {
3701 XEvent ev;
3702 int w = xw.w, h = xw.h;
3703 fd_set rfd;
3704 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3705 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3706
3707 /* Waiting for window mapping */
3708 while(1) {
3709 XNextEvent(xw.dpy, &ev);
3710 if(ev.type == ConfigureNotify) {
3711 w = ev.xconfigure.width;
3712 h = ev.xconfigure.height;
3713 } else if(ev.type == MapNotify) {
3714 break;
3715 }
3716 }
3717
3718 ttynew();
3719 cresize(w, h);
3720
3721 gettimeofday(&last, NULL);
3722 lastblink = last;
3723
3724 for(xev = actionfps;;) {
3725 long deltatime;
3726
3727 FD_ZERO(&rfd);
3728 FD_SET(cmdfd, &rfd);
3729 FD_SET(xfd, &rfd);
3730
3731 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3732 if(errno == EINTR)
3733 continue;
3734 die("select failed: %s\n", strerror(errno));
3735 }
3736 if(FD_ISSET(cmdfd, &rfd)) {
3737 ttyread();
3738 if(blinktimeout) {
3739 blinkset = tattrset(ATTR_BLINK);
3740 if(!blinkset)
3741 MODBIT(term.mode, 0, MODE_BLINK);
3742 }
3743 }
3744
3745 if(FD_ISSET(xfd, &rfd))
3746 xev = actionfps;
3747
3748 gettimeofday(&now, NULL);
3749 drawtimeout.tv_sec = 0;
3750 drawtimeout.tv_usec = (1000/xfps) * 1000;
3751 tv = &drawtimeout;
3752
3753 dodraw = 0;
3754 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3755 tsetdirtattr(ATTR_BLINK);
3756 term.mode ^= MODE_BLINK;
3757 lastblink = now;
3758 dodraw = 1;
3759 }
3760 deltatime = TIMEDIFF(now, last);
3761 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3762 || deltatime < 0) {
3763 dodraw = 1;
3764 last = now;
3765 }
3766
3767 if(dodraw) {
3768 while(XPending(xw.dpy)) {
3769 XNextEvent(xw.dpy, &ev);
3770 if(XFilterEvent(&ev, None))
3771 continue;
3772 if(handler[ev.type])
3773 (handler[ev.type])(&ev);
3774 }
3775
3776 draw();
3777 XFlush(xw.dpy);
3778
3779 if(xev && !FD_ISSET(xfd, &rfd))
3780 xev--;
3781 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3782 if(blinkset) {
3783 if(TIMEDIFF(now, lastblink) \
3784 > blinktimeout) {
3785 drawtimeout.tv_usec = 1;
3786 } else {
3787 drawtimeout.tv_usec = (1000 * \
3788 (blinktimeout - \
3789 TIMEDIFF(now,
3790 lastblink)));
3791 }
3792 } else {
3793 tv = NULL;
3794 }
3795 }
3796 }
3797 }
3798 }
3799
3800 void
3801 usage(void) {
3802 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3803 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3804 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3805 }
3806
3807 int
3808 main(int argc, char *argv[]) {
3809 char *titles;
3810 uint cols = 80, rows = 24;
3811
3812 xw.l = xw.t = 0;
3813 xw.isfixed = False;
3814
3815 ARGBEGIN {
3816 case 'a':
3817 allowaltscreen = false;
3818 break;
3819 case 'c':
3820 opt_class = EARGF(usage());
3821 break;
3822 case 'e':
3823 /* eat all remaining arguments */
3824 if(argc > 1) {
3825 opt_cmd = &argv[1];
3826 if(argv[1] != NULL && opt_title == NULL) {
3827 titles = xstrdup(argv[1]);
3828 opt_title = basename(titles);
3829 }
3830 }
3831 goto run;
3832 case 'f':
3833 opt_font = EARGF(usage());
3834 break;
3835 case 'g':
3836 xw.gm = XParseGeometry(EARGF(usage()),
3837 &xw.l, &xw.t, &cols, &rows);
3838 break;
3839 case 'i':
3840 xw.isfixed = True;
3841 break;
3842 case 'o':
3843 opt_io = EARGF(usage());
3844 break;
3845 case 't':
3846 opt_title = EARGF(usage());
3847 break;
3848 case 'w':
3849 opt_embed = EARGF(usage());
3850 break;
3851 case 'v':
3852 default:
3853 usage();
3854 } ARGEND;
3855
3856 run:
3857 setlocale(LC_CTYPE, "");
3858 XSetLocaleModifiers("");
3859 tnew(cols? cols : 1, rows? rows : 1);
3860 xinit();
3861 selinit();
3862 run();
3863
3864 return 0;
3865 }
3866