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Fix some bugs in mouse tracking logic
[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 <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <time.h>
21 #include <unistd.h>
22 #include <libgen.h>
23 #include <X11/Xatom.h>
24 #include <X11/Xlib.h>
25 #include <X11/Xutil.h>
26 #include <X11/cursorfont.h>
27 #include <X11/keysym.h>
28 #include <X11/Xft/Xft.h>
29 #include <fontconfig/fontconfig.h>
30 #include <wchar.h>
31
32 #include "arg.h"
33
34 char *argv0;
35
36 #define Glyph Glyph_
37 #define Font Font_
38 #define Draw XftDraw *
39 #define Colour XftColor
40 #define Colourmap Colormap
41 #define Rectangle XRectangle
42
43 #if defined(__linux)
44 #include <pty.h>
45 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
46 #include <util.h>
47 #elif defined(__FreeBSD__) || defined(__DragonFly__)
48 #include <libutil.h>
49 #endif
50
51
52 /* XEMBED messages */
53 #define XEMBED_FOCUS_IN 4
54 #define XEMBED_FOCUS_OUT 5
55
56 /* Arbitrary sizes */
57 #define UTF_SIZ 4
58 #define ESC_BUF_SIZ (128*UTF_SIZ)
59 #define ESC_ARG_SIZ 16
60 #define STR_BUF_SIZ ESC_BUF_SIZ
61 #define STR_ARG_SIZ ESC_ARG_SIZ
62 #define DRAW_BUF_SIZ 20*1024
63 #define XK_ANY_MOD UINT_MAX
64 #define XK_NO_MOD 0
65 #define XK_SWITCH_MOD (1<<13)
66
67 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
68
69 /* macros */
70 #define SERRNO strerror(errno)
71 #define MIN(a, b) ((a) < (b) ? (a) : (b))
72 #define MAX(a, b) ((a) < (b) ? (b) : (a))
73 #define LEN(a) (sizeof(a) / sizeof(a[0]))
74 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
75 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
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
82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
83 #define IS_TRUECOL(x) (1 << 24 & (x))
84 #define TRUERED(x) (((x) & 0xff0000) >> 8)
85 #define TRUEGREEN(x) (((x) & 0xff00))
86 #define TRUEBLUE(x) (((x) & 0xff) << 8)
87
88
89 #define VT102ID "\033[?6c"
90
91 enum glyph_attribute {
92 ATTR_NULL = 0,
93 ATTR_REVERSE = 1,
94 ATTR_UNDERLINE = 2,
95 ATTR_BOLD = 4,
96 ATTR_GFX = 8,
97 ATTR_ITALIC = 16,
98 ATTR_BLINK = 32,
99 ATTR_WRAP = 64,
100 ATTR_WIDE = 128,
101 ATTR_WDUMMY = 256,
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_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
136 |MODE_MOUSEMANY,
137 };
138
139 enum escape_state {
140 ESC_START = 1,
141 ESC_CSI = 2,
142 ESC_STR = 4, /* DSC, OSC, PM, APC */
143 ESC_ALTCHARSET = 8,
144 ESC_STR_END = 16, /* a final string was encountered */
145 ESC_TEST = 32, /* Enter in test mode */
146 };
147
148 enum window_state {
149 WIN_VISIBLE = 1,
150 WIN_REDRAW = 2,
151 WIN_FOCUSED = 4
152 };
153
154 enum selection_type {
155 SEL_REGULAR = 1,
156 SEL_RECTANGULAR = 2
157 };
158
159 enum selection_snap {
160 SNAP_WORD = 1,
161 SNAP_LINE = 2
162 };
163
164 typedef unsigned char uchar;
165 typedef unsigned int uint;
166 typedef unsigned long ulong;
167 typedef unsigned short ushort;
168
169 typedef struct {
170 char c[UTF_SIZ]; /* character code */
171 ushort mode; /* attribute flags */
172 ulong fg; /* foreground */
173 ulong bg; /* background */
174 } Glyph;
175
176 typedef Glyph *Line;
177
178 typedef struct {
179 Glyph attr; /* current char attributes */
180 int x;
181 int y;
182 char state;
183 } TCursor;
184
185 /* CSI Escape sequence structs */
186 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
187 typedef struct {
188 char buf[ESC_BUF_SIZ]; /* raw string */
189 int len; /* raw string length */
190 char priv;
191 int arg[ESC_ARG_SIZ];
192 int narg; /* nb of args */
193 char mode;
194 } CSIEscape;
195
196 /* STR Escape sequence structs */
197 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
198 typedef struct {
199 char type; /* ESC type ... */
200 char buf[STR_BUF_SIZ]; /* raw string */
201 int len; /* raw string length */
202 char *args[STR_ARG_SIZ];
203 int narg; /* nb of args */
204 } STREscape;
205
206 /* Internal representation of the screen */
207 typedef struct {
208 int row; /* nb row */
209 int col; /* nb col */
210 Line *line; /* screen */
211 Line *alt; /* alternate screen */
212 bool *dirty; /* dirtyness of lines */
213 TCursor c; /* cursor */
214 int top; /* top scroll limit */
215 int bot; /* bottom scroll limit */
216 int mode; /* terminal mode flags */
217 int esc; /* escape state flags */
218 bool numlock; /* lock numbers in keyboard */
219 bool *tabs;
220 } Term;
221
222 /* Purely graphic info */
223 typedef struct {
224 Display *dpy;
225 Colourmap cmap;
226 Window win;
227 Drawable buf;
228 Atom xembed, wmdeletewin;
229 XIM xim;
230 XIC xic;
231 Draw draw;
232 Visual *vis;
233 XSetWindowAttributes attrs;
234 int scr;
235 bool isfixed; /* is fixed geometry? */
236 int fx, fy, fw, fh; /* fixed geometry */
237 int tw, th; /* tty width and height */
238 int w, h; /* window width and height */
239 int ch; /* char height */
240 int cw; /* char width */
241 char state; /* focus, redraw, visible */
242 } XWindow;
243
244 typedef struct {
245 int b;
246 uint mask;
247 char s[ESC_BUF_SIZ];
248 } Mousekey;
249
250 typedef struct {
251 KeySym k;
252 uint mask;
253 char s[ESC_BUF_SIZ];
254 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
255 signed char appkey; /* application keypad */
256 signed char appcursor; /* application cursor */
257 signed char crlf; /* crlf mode */
258 } Key;
259
260 typedef struct {
261 int mode;
262 int type;
263 int snap;
264 /*
265 * Selection variables:
266 * nb – normalized coordinates of the beginning of the selection
267 * ne – normalized coordinates of the end of the selection
268 * ob – original coordinates of the beginning of the selection
269 * oe – original coordinates of the end of the selection
270 */
271 struct {
272 int x, y;
273 } nb, ne, ob, oe;
274
275 char *clip;
276 Atom xtarget;
277 bool alt;
278 struct timeval tclick1;
279 struct timeval tclick2;
280 } Selection;
281
282 typedef union {
283 int i;
284 unsigned int ui;
285 float f;
286 const void *v;
287 } Arg;
288
289 typedef struct {
290 unsigned int mod;
291 KeySym keysym;
292 void (*func)(const Arg *);
293 const Arg arg;
294 } Shortcut;
295
296 /* function definitions used in config.h */
297 static void clippaste(const Arg *);
298 static void numlock(const Arg *);
299 static void selpaste(const Arg *);
300 static void xzoom(const Arg *);
301
302 /* Config.h for applying patches and the configuration. */
303 #include "config.h"
304
305 /* Font structure */
306 typedef struct {
307 int height;
308 int width;
309 int ascent;
310 int descent;
311 short lbearing;
312 short rbearing;
313 XftFont *match;
314 FcFontSet *set;
315 FcPattern *pattern;
316 } Font;
317
318 /* Drawing Context */
319 typedef struct {
320 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
321 Font font, bfont, ifont, ibfont;
322 GC gc;
323 } DC;
324
325 static void die(const char *, ...);
326 static void draw(void);
327 static void redraw(int);
328 static void drawregion(int, int, int, int);
329 static void execsh(void);
330 static void sigchld(int);
331 static void run(void);
332
333 static void csidump(void);
334 static void csihandle(void);
335 static void csiparse(void);
336 static void csireset(void);
337 static void strdump(void);
338 static void strhandle(void);
339 static void strparse(void);
340 static void strreset(void);
341
342 static int tattrset(int);
343 static void tclearregion(int, int, int, int);
344 static void tcursor(int);
345 static void tdeletechar(int);
346 static void tdeleteline(int);
347 static void tinsertblank(int);
348 static void tinsertblankline(int);
349 static void tmoveto(int, int);
350 static void tmoveato(int x, int y);
351 static void tnew(int, int);
352 static void tnewline(int);
353 static void tputtab(bool);
354 static void tputc(char *, int);
355 static void treset(void);
356 static int tresize(int, int);
357 static void tscrollup(int, int);
358 static void tscrolldown(int, int);
359 static void tsetattr(int*, int);
360 static void tsetchar(char *, Glyph *, int, int);
361 static void tsetscroll(int, int);
362 static void tswapscreen(void);
363 static void tsetdirt(int, int);
364 static void tsetdirtattr(int);
365 static void tsetmode(bool, bool, int *, int);
366 static void tfulldirt(void);
367 static void techo(char *, int);
368 static long tdefcolor(int *, int *, int);
369 static inline bool match(uint, uint);
370 static void ttynew(void);
371 static void ttyread(void);
372 static void ttyresize(void);
373 static void ttywrite(const char *, size_t);
374
375 static void xdraws(char *, Glyph, int, int, int, int);
376 static void xhints(void);
377 static void xclear(int, int, int, int);
378 static void xdrawcursor(void);
379 static void xinit(void);
380 static void xloadcols(void);
381 static int xsetcolorname(int, const char *);
382 static int xloadfont(Font *, FcPattern *);
383 static void xloadfonts(char *, int);
384 static int xloadfontset(Font *);
385 static void xsettitle(char *);
386 static void xresettitle(void);
387 static void xsetpointermotion(int);
388 static void xseturgency(int);
389 static void xsetsel(char*);
390 static void xtermclear(int, int, int, int);
391 static void xunloadfont(Font *f);
392 static void xunloadfonts(void);
393 static void xresize(int, int);
394
395 static void expose(XEvent *);
396 static void visibility(XEvent *);
397 static void unmap(XEvent *);
398 static char *kmap(KeySym, uint);
399 static void kpress(XEvent *);
400 static void cmessage(XEvent *);
401 static void cresize(int, int);
402 static void resize(XEvent *);
403 static void focus(XEvent *);
404 static void brelease(XEvent *);
405 static void bpress(XEvent *);
406 static void bmotion(XEvent *);
407 static void selnotify(XEvent *);
408 static void selclear(XEvent *);
409 static void selrequest(XEvent *);
410
411 static void selinit(void);
412 static void selsort(void);
413 static inline bool selected(int, int);
414 static void selcopy(void);
415 static void selscroll(int, int);
416 static void selsnap(int, int *, int *, int);
417
418 static int utf8decode(char *, long *);
419 static int utf8encode(long *, char *);
420 static int utf8size(char *);
421 static int isfullutf8(char *, int);
422
423 static ssize_t xwrite(int, char *, size_t);
424 static void *xmalloc(size_t);
425 static void *xrealloc(void *, size_t);
426
427 static void (*handler[LASTEvent])(XEvent *) = {
428 [KeyPress] = kpress,
429 [ClientMessage] = cmessage,
430 [ConfigureNotify] = resize,
431 [VisibilityNotify] = visibility,
432 [UnmapNotify] = unmap,
433 [Expose] = expose,
434 [FocusIn] = focus,
435 [FocusOut] = focus,
436 [MotionNotify] = bmotion,
437 [ButtonPress] = bpress,
438 [ButtonRelease] = brelease,
439 [SelectionClear] = selclear,
440 [SelectionNotify] = selnotify,
441 [SelectionRequest] = selrequest,
442 };
443
444 /* Globals */
445 static DC dc;
446 static XWindow xw;
447 static Term term;
448 static CSIEscape csiescseq;
449 static STREscape strescseq;
450 static int cmdfd;
451 static pid_t pid;
452 static Selection sel;
453 static int iofd = -1;
454 static char **opt_cmd = NULL;
455 static char *opt_io = NULL;
456 static char *opt_title = NULL;
457 static char *opt_embed = NULL;
458 static char *opt_class = NULL;
459 static char *opt_font = NULL;
460 static int oldbutton = 3; /* button event on startup: 3 = release */
461
462 static char *usedfont = NULL;
463 static int usedfontsize = 0;
464
465 /* Font Ring Cache */
466 enum {
467 FRC_NORMAL,
468 FRC_ITALIC,
469 FRC_BOLD,
470 FRC_ITALICBOLD
471 };
472
473 typedef struct {
474 XftFont *font;
475 int flags;
476 } Fontcache;
477
478 /* Fontcache is an array now. A new font will be appended to the array. */
479 static Fontcache frc[16];
480 static int frclen = 0;
481
482 ssize_t
483 xwrite(int fd, char *s, size_t len) {
484 size_t aux = len;
485
486 while(len > 0) {
487 ssize_t r = write(fd, s, len);
488 if(r < 0)
489 return r;
490 len -= r;
491 s += r;
492 }
493 return aux;
494 }
495
496 void *
497 xmalloc(size_t len) {
498 void *p = malloc(len);
499
500 if(!p)
501 die("Out of memory\n");
502
503 return p;
504 }
505
506 void *
507 xrealloc(void *p, size_t len) {
508 if((p = realloc(p, len)) == NULL)
509 die("Out of memory\n");
510
511 return p;
512 }
513
514 int
515 utf8decode(char *s, long *u) {
516 uchar c;
517 int i, n, rtn;
518
519 rtn = 1;
520 c = *s;
521 if(~c & 0x80) { /* 0xxxxxxx */
522 *u = c;
523 return rtn;
524 } else if((c & 0xE0) == 0xC0) { /* 110xxxxx */
525 *u = c & 0x1F;
526 n = 1;
527 } else if((c & 0xF0) == 0xE0) { /* 1110xxxx */
528 *u = c & 0x0F;
529 n = 2;
530 } else if((c & 0xF8) == 0xF0) { /* 11110xxx */
531 *u = c & 0x07;
532 n = 3;
533 } else {
534 goto invalid;
535 }
536
537 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
538 c = *s;
539 if((c & 0xC0) != 0x80) /* 10xxxxxx */
540 goto invalid;
541 *u <<= 6;
542 *u |= c & 0x3F;
543 }
544
545 if((n == 1 && *u < 0x80) ||
546 (n == 2 && *u < 0x800) ||
547 (n == 3 && *u < 0x10000) ||
548 (*u >= 0xD800 && *u <= 0xDFFF)) {
549 goto invalid;
550 }
551
552 return rtn;
553 invalid:
554 *u = 0xFFFD;
555
556 return rtn;
557 }
558
559 int
560 utf8encode(long *u, char *s) {
561 uchar *sp;
562 ulong uc;
563 int i, n;
564
565 sp = (uchar *)s;
566 uc = *u;
567 if(uc < 0x80) {
568 *sp = uc; /* 0xxxxxxx */
569 return 1;
570 } else if(*u < 0x800) {
571 *sp = (uc >> 6) | 0xC0; /* 110xxxxx */
572 n = 1;
573 } else if(uc < 0x10000) {
574 *sp = (uc >> 12) | 0xE0; /* 1110xxxx */
575 n = 2;
576 } else if(uc <= 0x10FFFF) {
577 *sp = (uc >> 18) | 0xF0; /* 11110xxx */
578 n = 3;
579 } else {
580 goto invalid;
581 }
582
583 for(i=n,++sp; i>0; --i,++sp)
584 *sp = ((uc >> 6*(i-1)) & 0x3F) | 0x80; /* 10xxxxxx */
585
586 return n+1;
587 invalid:
588 /* U+FFFD */
589 *s++ = '\xEF';
590 *s++ = '\xBF';
591 *s = '\xBD';
592
593 return 3;
594 }
595
596 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
597 UTF-8 otherwise return 0 */
598 int
599 isfullutf8(char *s, int b) {
600 uchar *c1, *c2, *c3;
601
602 c1 = (uchar *)s;
603 c2 = (uchar *)++s;
604 c3 = (uchar *)++s;
605 if(b < 1) {
606 return 0;
607 } else if((*c1 & 0xE0) == 0xC0 && b == 1) {
608 return 0;
609 } else if((*c1 & 0xF0) == 0xE0 &&
610 ((b == 1) ||
611 ((b == 2) && (*c2 & 0xC0) == 0x80))) {
612 return 0;
613 } else if((*c1 & 0xF8) == 0xF0 &&
614 ((b == 1) ||
615 ((b == 2) && (*c2 & 0xC0) == 0x80) ||
616 ((b == 3) && (*c2 & 0xC0) == 0x80 && (*c3 & 0xC0) == 0x80))) {
617 return 0;
618 } else {
619 return 1;
620 }
621 }
622
623 int
624 utf8size(char *s) {
625 uchar c = *s;
626
627 if(~c & 0x80) {
628 return 1;
629 } else if((c & 0xE0) == 0xC0) {
630 return 2;
631 } else if((c & 0xF0) == 0xE0) {
632 return 3;
633 } else {
634 return 4;
635 }
636 }
637
638 static void
639 selinit(void) {
640 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
641 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
642 sel.mode = 0;
643 sel.ob.x = -1;
644 sel.clip = NULL;
645 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
646 if(sel.xtarget == None)
647 sel.xtarget = XA_STRING;
648 }
649
650 static int
651 x2col(int x) {
652 x -= borderpx;
653 x /= xw.cw;
654
655 return LIMIT(x, 0, term.col-1);
656 }
657
658 static int
659 y2row(int y) {
660 y -= borderpx;
661 y /= xw.ch;
662
663 return LIMIT(y, 0, term.row-1);
664 }
665
666 static void
667 selsort(void) {
668 if(sel.ob.y == sel.oe.y) {
669 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
670 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
671 } else {
672 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
673 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
674 }
675 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
676 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
677 }
678
679 static inline bool
680 selected(int x, int y) {
681 if(sel.ne.y == y && sel.nb.y == y)
682 return BETWEEN(x, sel.nb.x, sel.ne.x);
683
684 if(sel.type == SEL_RECTANGULAR) {
685 return ((sel.nb.y <= y && y <= sel.ne.y)
686 && (sel.nb.x <= x && x <= sel.ne.x));
687 }
688
689 return ((sel.nb.y < y && y < sel.ne.y)
690 || (y == sel.ne.y && x <= sel.ne.x))
691 || (y == sel.nb.y && x >= sel.nb.x
692 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
693 }
694
695 void
696 selsnap(int mode, int *x, int *y, int direction) {
697 int i;
698
699 switch(mode) {
700 case SNAP_WORD:
701 /*
702 * Snap around if the word wraps around at the end or
703 * beginning of a line.
704 */
705 for(;;) {
706 if(direction < 0 && *x <= 0) {
707 if(*y > 0 && term.line[*y - 1][term.col-1].mode
708 & ATTR_WRAP) {
709 *y -= 1;
710 *x = term.col-1;
711 } else {
712 break;
713 }
714 }
715 if(direction > 0 && *x >= term.col-1) {
716 if(*y < term.row-1 && term.line[*y][*x].mode
717 & ATTR_WRAP) {
718 *y += 1;
719 *x = 0;
720 } else {
721 break;
722 }
723 }
724
725 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
726 *x += direction;
727 continue;
728 }
729
730 if(strchr(worddelimiters,
731 term.line[*y][*x+direction].c[0])) {
732 break;
733 }
734
735 *x += direction;
736 }
737 break;
738 case SNAP_LINE:
739 /*
740 * Snap around if the the previous line or the current one
741 * has set ATTR_WRAP at its end. Then the whole next or
742 * previous line will be selected.
743 */
744 *x = (direction < 0) ? 0 : term.col - 1;
745 if(direction < 0 && *y > 0) {
746 for(; *y > 0; *y += direction) {
747 if(!(term.line[*y-1][term.col-1].mode
748 & ATTR_WRAP)) {
749 break;
750 }
751 }
752 } else if(direction > 0 && *y < term.row-1) {
753 for(; *y < term.row; *y += direction) {
754 if(!(term.line[*y][term.col-1].mode
755 & ATTR_WRAP)) {
756 break;
757 }
758 }
759 }
760 break;
761 default:
762 /*
763 * Select the whole line when the end of line is reached.
764 */
765 if(direction > 0) {
766 i = term.col;
767 while(--i > 0 && term.line[*y][i].c[0] == ' ')
768 /* nothing */;
769 if(i > 0 && i < *x)
770 *x = term.col - 1;
771 }
772 break;
773 }
774 }
775
776 void
777 getbuttoninfo(XEvent *e) {
778 int type;
779 uint state = e->xbutton.state &~Button1Mask;
780
781 sel.alt = IS_SET(MODE_ALTSCREEN);
782
783 sel.oe.x = x2col(e->xbutton.x);
784 sel.oe.y = y2row(e->xbutton.y);
785
786 if(sel.ob.y < sel.oe.y
787 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
788 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
789 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
790 } else {
791 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
792 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
793 }
794 selsort();
795
796 sel.type = SEL_REGULAR;
797 for(type = 1; type < LEN(selmasks); ++type) {
798 if(match(selmasks[type], state)) {
799 sel.type = type;
800 break;
801 }
802 }
803 }
804
805 void
806 mousereport(XEvent *e) {
807 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
808 button = e->xbutton.button, state = e->xbutton.state,
809 len;
810 char buf[40];
811 static int ox, oy;
812
813 /* from urxvt */
814 if(e->xbutton.type == MotionNotify) {
815 if(x == ox && y == oy)
816 return;
817 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
818 return;
819 /* MOUSE_MOTION: no reporting if no button is pressed */
820 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
821 return;
822
823 button = oldbutton + 32;
824 ox = x;
825 oy = y;
826 } else {
827 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
828 button = 3;
829 } else {
830 button -= Button1;
831 if(button >= 3)
832 button += 64 - 3;
833 }
834 if(e->xbutton.type == ButtonPress) {
835 oldbutton = button;
836 ox = x;
837 oy = y;
838 } else if(e->xbutton.type == ButtonRelease) {
839 oldbutton = 3;
840 /* MODE_MOUSEX10: no button release reporting */
841 if(IS_SET(MODE_MOUSEX10))
842 return;
843 }
844 }
845
846 if(!IS_SET(MODE_MOUSEX10)) {
847 button += (state & ShiftMask ? 4 : 0)
848 + (state & Mod4Mask ? 8 : 0)
849 + (state & ControlMask ? 16 : 0);
850 }
851
852 len = 0;
853 if(IS_SET(MODE_MOUSESGR)) {
854 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
855 button, x+1, y+1,
856 e->xbutton.type == ButtonRelease ? 'm' : 'M');
857 } else if(x < 223 && y < 223) {
858 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
859 32+button, 32+x+1, 32+y+1);
860 } else {
861 return;
862 }
863
864 ttywrite(buf, len);
865 }
866
867 void
868 bpress(XEvent *e) {
869 struct timeval now;
870 Mousekey *mk;
871
872 if(IS_SET(MODE_MOUSE)) {
873 mousereport(e);
874 return;
875 }
876
877 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
878 if(e->xbutton.button == mk->b
879 && match(mk->mask, e->xbutton.state)) {
880 ttywrite(mk->s, strlen(mk->s));
881 if(IS_SET(MODE_ECHO))
882 techo(mk->s, strlen(mk->s));
883 return;
884 }
885 }
886
887 if(e->xbutton.button == Button1) {
888 gettimeofday(&now, NULL);
889
890 /* Clear previous selection, logically and visually. */
891 selclear(NULL);
892 sel.mode = 1;
893 sel.type = SEL_REGULAR;
894 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
895 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
896
897 /*
898 * If the user clicks below predefined timeouts specific
899 * snapping behaviour is exposed.
900 */
901 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
902 sel.snap = SNAP_LINE;
903 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
904 sel.snap = SNAP_WORD;
905 } else {
906 sel.snap = 0;
907 }
908 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
909 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
910 selsort();
911
912 /*
913 * Draw selection, unless it's regular and we don't want to
914 * make clicks visible
915 */
916 if(sel.snap != 0) {
917 sel.mode++;
918 tsetdirt(sel.nb.y, sel.ne.y);
919 }
920 sel.tclick2 = sel.tclick1;
921 sel.tclick1 = now;
922 }
923 }
924
925 void
926 selcopy(void) {
927 char *str, *ptr;
928 int x, y, bufsize, size, i, ex;
929 Glyph *gp, *last;
930
931 if(sel.ob.x == -1) {
932 str = NULL;
933 } else {
934 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
935 ptr = str = xmalloc(bufsize);
936
937 /* append every set & selected glyph to the selection */
938 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
939 gp = &term.line[y][0];
940 last = gp + term.col;
941
942 while(--last >= gp && !(selected(last - gp, y) && \
943 strcmp(last->c, " ") != 0))
944 /* nothing */;
945
946 for(x = 0; gp <= last; x++, ++gp) {
947 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
948 continue;
949
950 size = utf8size(gp->c);
951 memcpy(ptr, gp->c, size);
952 ptr += size;
953 }
954
955 /*
956 * Copy and pasting of line endings is inconsistent
957 * in the inconsistent terminal and GUI world.
958 * The best solution seems like to produce '\n' when
959 * something is copied from st and convert '\n' to
960 * '\r', when something to be pasted is received by
961 * st.
962 * FIXME: Fix the computer world.
963 */
964 if(y < sel.ne.y && !((gp-1)->mode & ATTR_WRAP))
965 *ptr++ = '\n';
966
967 /*
968 * If the last selected line expands in the selection
969 * after the visible text '\n' is appended.
970 */
971 if(y == sel.ne.y) {
972 i = term.col;
973 while(--i > 0 && term.line[y][i].c[0] == ' ')
974 /* nothing */;
975 ex = sel.ne.x;
976 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
977 ex = sel.nb.x;
978 if(i < ex)
979 *ptr++ = '\n';
980 }
981 }
982 *ptr = 0;
983 }
984 xsetsel(str);
985 }
986
987 void
988 selnotify(XEvent *e) {
989 ulong nitems, ofs, rem;
990 int format;
991 uchar *data, *last, *repl;
992 Atom type;
993
994 ofs = 0;
995 do {
996 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
997 False, AnyPropertyType, &type, &format,
998 &nitems, &rem, &data)) {
999 fprintf(stderr, "Clipboard allocation failed\n");
1000 return;
1001 }
1002
1003 /*
1004 * As seen in selcopy:
1005 * Line endings are inconsistent in the terminal and GUI world
1006 * copy and pasting. When receiving some selection data,
1007 * replace all '\n' with '\r'.
1008 * FIXME: Fix the computer world.
1009 */
1010 repl = data;
1011 last = data + nitems * format / 8;
1012 while((repl = memchr(repl, '\n', last - repl))) {
1013 *repl++ = '\r';
1014 }
1015
1016 ttywrite((const char *)data, nitems * format / 8);
1017 XFree(data);
1018 /* number of 32-bit chunks returned */
1019 ofs += nitems * format / 32;
1020 } while(rem > 0);
1021 }
1022
1023 void
1024 selpaste(const Arg *dummy) {
1025 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1026 xw.win, CurrentTime);
1027 }
1028
1029 void
1030 clippaste(const Arg *dummy) {
1031 Atom clipboard;
1032
1033 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1034 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1035 xw.win, CurrentTime);
1036 }
1037
1038 void
1039 selclear(XEvent *e) {
1040 if(sel.ob.x == -1)
1041 return;
1042 sel.ob.x = -1;
1043 tsetdirt(sel.nb.y, sel.ne.y);
1044 }
1045
1046 void
1047 selrequest(XEvent *e) {
1048 XSelectionRequestEvent *xsre;
1049 XSelectionEvent xev;
1050 Atom xa_targets, string;
1051
1052 xsre = (XSelectionRequestEvent *) e;
1053 xev.type = SelectionNotify;
1054 xev.requestor = xsre->requestor;
1055 xev.selection = xsre->selection;
1056 xev.target = xsre->target;
1057 xev.time = xsre->time;
1058 /* reject */
1059 xev.property = None;
1060
1061 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1062 if(xsre->target == xa_targets) {
1063 /* respond with the supported type */
1064 string = sel.xtarget;
1065 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1066 XA_ATOM, 32, PropModeReplace,
1067 (uchar *) &string, 1);
1068 xev.property = xsre->property;
1069 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1070 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1071 xsre->target, 8, PropModeReplace,
1072 (uchar *) sel.clip, strlen(sel.clip));
1073 xev.property = xsre->property;
1074 }
1075
1076 /* all done, send a notification to the listener */
1077 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1078 fprintf(stderr, "Error sending SelectionNotify event\n");
1079 }
1080
1081 void
1082 xsetsel(char *str) {
1083 /* register the selection for both the clipboard and the primary */
1084 Atom clipboard;
1085
1086 free(sel.clip);
1087 sel.clip = str;
1088
1089 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1090
1091 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1092 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1093 }
1094
1095 void
1096 brelease(XEvent *e) {
1097 if(IS_SET(MODE_MOUSE)) {
1098 mousereport(e);
1099 return;
1100 }
1101
1102 if(e->xbutton.button == Button2) {
1103 selpaste(NULL);
1104 } else if(e->xbutton.button == Button1) {
1105 if(sel.mode < 2) {
1106 selclear(NULL);
1107 } else {
1108 getbuttoninfo(e);
1109 selcopy();
1110 }
1111 sel.mode = 0;
1112 tsetdirt(sel.nb.y, sel.ne.y);
1113 }
1114 }
1115
1116 void
1117 bmotion(XEvent *e) {
1118 int oldey, oldex, oldsby, oldsey;
1119
1120 if(IS_SET(MODE_MOUSE)) {
1121 mousereport(e);
1122 return;
1123 }
1124
1125 if(!sel.mode)
1126 return;
1127
1128 sel.mode++;
1129 oldey = sel.oe.y;
1130 oldex = sel.oe.x;
1131 oldsby = sel.nb.y;
1132 oldsey = sel.ne.y;
1133 getbuttoninfo(e);
1134
1135 if(oldey != sel.oe.y || oldex != sel.oe.x)
1136 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1137 }
1138
1139 void
1140 die(const char *errstr, ...) {
1141 va_list ap;
1142
1143 va_start(ap, errstr);
1144 vfprintf(stderr, errstr, ap);
1145 va_end(ap);
1146 exit(EXIT_FAILURE);
1147 }
1148
1149 void
1150 execsh(void) {
1151 char **args;
1152 char *envshell = getenv("SHELL");
1153 const struct passwd *pass = getpwuid(getuid());
1154 char buf[sizeof(long) * 8 + 1];
1155
1156 unsetenv("COLUMNS");
1157 unsetenv("LINES");
1158 unsetenv("TERMCAP");
1159
1160 if(pass) {
1161 setenv("LOGNAME", pass->pw_name, 1);
1162 setenv("USER", pass->pw_name, 1);
1163 setenv("SHELL", pass->pw_shell, 0);
1164 setenv("HOME", pass->pw_dir, 0);
1165 }
1166
1167 snprintf(buf, sizeof(buf), "%lu", xw.win);
1168 setenv("WINDOWID", buf, 1);
1169
1170 signal(SIGCHLD, SIG_DFL);
1171 signal(SIGHUP, SIG_DFL);
1172 signal(SIGINT, SIG_DFL);
1173 signal(SIGQUIT, SIG_DFL);
1174 signal(SIGTERM, SIG_DFL);
1175 signal(SIGALRM, SIG_DFL);
1176
1177 DEFAULT(envshell, shell);
1178 setenv("TERM", termname, 1);
1179 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1180 execvp(args[0], args);
1181 exit(EXIT_FAILURE);
1182 }
1183
1184 void
1185 sigchld(int a) {
1186 int stat = 0;
1187
1188 if(waitpid(pid, &stat, 0) < 0)
1189 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
1190
1191 if(WIFEXITED(stat)) {
1192 exit(WEXITSTATUS(stat));
1193 } else {
1194 exit(EXIT_FAILURE);
1195 }
1196 }
1197
1198 void
1199 ttynew(void) {
1200 int m, s;
1201 struct winsize w = {term.row, term.col, 0, 0};
1202
1203 /* seems to work fine on linux, openbsd and freebsd */
1204 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1205 die("openpty failed: %s\n", SERRNO);
1206
1207 switch(pid = fork()) {
1208 case -1:
1209 die("fork failed\n");
1210 break;
1211 case 0:
1212 setsid(); /* create a new process group */
1213 dup2(s, STDIN_FILENO);
1214 dup2(s, STDOUT_FILENO);
1215 dup2(s, STDERR_FILENO);
1216 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1217 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
1218 close(s);
1219 close(m);
1220 execsh();
1221 break;
1222 default:
1223 close(s);
1224 cmdfd = m;
1225 signal(SIGCHLD, sigchld);
1226 if(opt_io) {
1227 iofd = (!strcmp(opt_io, "-")) ?
1228 STDOUT_FILENO :
1229 open(opt_io, O_WRONLY | O_CREAT, 0666);
1230 if(iofd < 0) {
1231 fprintf(stderr, "Error opening %s:%s\n",
1232 opt_io, strerror(errno));
1233 }
1234 }
1235 }
1236 }
1237
1238 void
1239 dump(char c) {
1240 static int col;
1241
1242 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1243 if(++col % 10 == 0)
1244 fprintf(stderr, "\n");
1245 }
1246
1247 void
1248 ttyread(void) {
1249 static char buf[BUFSIZ];
1250 static int buflen = 0;
1251 char *ptr;
1252 char s[UTF_SIZ];
1253 int charsize; /* size of utf8 char in bytes */
1254 long utf8c;
1255 int ret;
1256
1257 /* append read bytes to unprocessed bytes */
1258 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1259 die("Couldn't read from shell: %s\n", SERRNO);
1260
1261 /* process every complete utf8 char */
1262 buflen += ret;
1263 ptr = buf;
1264 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
1265 charsize = utf8decode(ptr, &utf8c);
1266 utf8encode(&utf8c, s);
1267 tputc(s, charsize);
1268 ptr += charsize;
1269 buflen -= charsize;
1270 }
1271
1272 /* keep any uncomplete utf8 char for the next call */
1273 memmove(buf, ptr, buflen);
1274 }
1275
1276 void
1277 ttywrite(const char *s, size_t n) {
1278 if(write(cmdfd, s, n) == -1)
1279 die("write error on tty: %s\n", SERRNO);
1280 }
1281
1282 void
1283 ttyresize(void) {
1284 struct winsize w;
1285
1286 w.ws_row = term.row;
1287 w.ws_col = term.col;
1288 w.ws_xpixel = xw.tw;
1289 w.ws_ypixel = xw.th;
1290 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1291 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
1292 }
1293
1294 int
1295 tattrset(int attr) {
1296 int i, j;
1297
1298 for(i = 0; i < term.row-1; i++) {
1299 for(j = 0; j < term.col-1; j++) {
1300 if(term.line[i][j].mode & attr)
1301 return 1;
1302 }
1303 }
1304
1305 return 0;
1306 }
1307
1308 void
1309 tsetdirt(int top, int bot) {
1310 int i;
1311
1312 LIMIT(top, 0, term.row-1);
1313 LIMIT(bot, 0, term.row-1);
1314
1315 for(i = top; i <= bot; i++)
1316 term.dirty[i] = 1;
1317 }
1318
1319 void
1320 tsetdirtattr(int attr) {
1321 int i, j;
1322
1323 for(i = 0; i < term.row-1; i++) {
1324 for(j = 0; j < term.col-1; j++) {
1325 if(term.line[i][j].mode & attr) {
1326 tsetdirt(i, i);
1327 break;
1328 }
1329 }
1330 }
1331 }
1332
1333 void
1334 tfulldirt(void) {
1335 tsetdirt(0, term.row-1);
1336 }
1337
1338 void
1339 tcursor(int mode) {
1340 static TCursor c;
1341
1342 if(mode == CURSOR_SAVE) {
1343 c = term.c;
1344 } else if(mode == CURSOR_LOAD) {
1345 term.c = c;
1346 tmoveto(c.x, c.y);
1347 }
1348 }
1349
1350 void
1351 treset(void) {
1352 uint i;
1353
1354 term.c = (TCursor){{
1355 .mode = ATTR_NULL,
1356 .fg = defaultfg,
1357 .bg = defaultbg
1358 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1359
1360 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1361 for(i = tabspaces; i < term.col; i += tabspaces)
1362 term.tabs[i] = 1;
1363 term.top = 0;
1364 term.bot = term.row - 1;
1365 term.mode = MODE_WRAP;
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 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1399
1400 for(i = term.bot; i >= orig+n; i--) {
1401 temp = term.line[i];
1402 term.line[i] = term.line[i-n];
1403 term.line[i-n] = temp;
1404
1405 term.dirty[i] = 1;
1406 term.dirty[i-n] = 1;
1407 }
1408
1409 selscroll(orig, n);
1410 }
1411
1412 void
1413 tscrollup(int orig, int n) {
1414 int i;
1415 Line temp;
1416 LIMIT(n, 0, term.bot-orig+1);
1417
1418 tclearregion(0, orig, term.col-1, orig+n-1);
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 term.dirty[i] = 1;
1426 term.dirty[i+n] = 1;
1427 }
1428
1429 selscroll(orig, -n);
1430 }
1431
1432 void
1433 selscroll(int orig, int n) {
1434 if(sel.ob.x == -1)
1435 return;
1436
1437 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1438 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1439 selclear(NULL);
1440 return;
1441 }
1442 if(sel.type == SEL_RECTANGULAR) {
1443 if(sel.ob.y < term.top)
1444 sel.ob.y = term.top;
1445 if(sel.oe.y > term.bot)
1446 sel.oe.y = term.bot;
1447 } else {
1448 if(sel.ob.y < term.top) {
1449 sel.ob.y = term.top;
1450 sel.ob.x = 0;
1451 }
1452 if(sel.oe.y > term.bot) {
1453 sel.oe.y = term.bot;
1454 sel.oe.x = term.col;
1455 }
1456 }
1457 selsort();
1458 }
1459 }
1460
1461 void
1462 tnewline(int first_col) {
1463 int y = term.c.y;
1464
1465 if(y == term.bot) {
1466 tscrollup(term.top, 1);
1467 } else {
1468 y++;
1469 }
1470 tmoveto(first_col ? 0 : term.c.x, y);
1471 }
1472
1473 void
1474 csiparse(void) {
1475 char *p = csiescseq.buf, *np;
1476 long int v;
1477
1478 csiescseq.narg = 0;
1479 if(*p == '?') {
1480 csiescseq.priv = 1;
1481 p++;
1482 }
1483
1484 csiescseq.buf[csiescseq.len] = '\0';
1485 while(p < csiescseq.buf+csiescseq.len) {
1486 np = NULL;
1487 v = strtol(p, &np, 10);
1488 if(np == p)
1489 v = 0;
1490 if(v == LONG_MAX || v == LONG_MIN)
1491 v = -1;
1492 csiescseq.arg[csiescseq.narg++] = v;
1493 p = np;
1494 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1495 break;
1496 p++;
1497 }
1498 csiescseq.mode = *p;
1499 }
1500
1501 /* for absolute user moves, when decom is set */
1502 void
1503 tmoveato(int x, int y) {
1504 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1505 }
1506
1507 void
1508 tmoveto(int x, int y) {
1509 int miny, maxy;
1510
1511 if(term.c.state & CURSOR_ORIGIN) {
1512 miny = term.top;
1513 maxy = term.bot;
1514 } else {
1515 miny = 0;
1516 maxy = term.row - 1;
1517 }
1518 LIMIT(x, 0, term.col-1);
1519 LIMIT(y, miny, maxy);
1520 term.c.state &= ~CURSOR_WRAPNEXT;
1521 term.c.x = x;
1522 term.c.y = y;
1523 }
1524
1525 void
1526 tsetchar(char *c, Glyph *attr, int x, int y) {
1527 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1528 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1529 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1530 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1531 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1532 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1533 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1534 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1535 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1536 };
1537
1538 /*
1539 * The table is proudly stolen from rxvt.
1540 */
1541 if(attr->mode & ATTR_GFX) {
1542 if(c[0] >= 0x41 && c[0] <= 0x7e
1543 && vt100_0[c[0] - 0x41]) {
1544 c = vt100_0[c[0] - 0x41];
1545 }
1546 }
1547
1548 if(term.line[y][x].mode & ATTR_WIDE) {
1549 if(x+1 < term.col) {
1550 term.line[y][x+1].c[0] = ' ';
1551 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1552 }
1553 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1554 term.line[y][x-1].c[0] = ' ';
1555 term.line[y][x-1].mode &= ~ATTR_WIDE;
1556 }
1557
1558 term.dirty[y] = 1;
1559 term.line[y][x] = *attr;
1560 memcpy(term.line[y][x].c, c, UTF_SIZ);
1561 }
1562
1563 void
1564 tclearregion(int x1, int y1, int x2, int y2) {
1565 int x, y, temp;
1566
1567 if(x1 > x2)
1568 temp = x1, x1 = x2, x2 = temp;
1569 if(y1 > y2)
1570 temp = y1, y1 = y2, y2 = temp;
1571
1572 LIMIT(x1, 0, term.col-1);
1573 LIMIT(x2, 0, term.col-1);
1574 LIMIT(y1, 0, term.row-1);
1575 LIMIT(y2, 0, term.row-1);
1576
1577 for(y = y1; y <= y2; y++) {
1578 term.dirty[y] = 1;
1579 for(x = x1; x <= x2; x++) {
1580 if(selected(x, y))
1581 selclear(NULL);
1582 term.line[y][x] = term.c.attr;
1583 memcpy(term.line[y][x].c, " ", 2);
1584 }
1585 }
1586 }
1587
1588 void
1589 tdeletechar(int n) {
1590 int src = term.c.x + n;
1591 int dst = term.c.x;
1592 int size = term.col - src;
1593
1594 term.dirty[term.c.y] = 1;
1595
1596 if(src >= term.col) {
1597 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1598 return;
1599 }
1600
1601 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1602 size * sizeof(Glyph));
1603 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1604 }
1605
1606 void
1607 tinsertblank(int n) {
1608 int src = term.c.x;
1609 int dst = src + n;
1610 int size = term.col - dst;
1611
1612 term.dirty[term.c.y] = 1;
1613
1614 if(dst >= term.col) {
1615 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1616 return;
1617 }
1618
1619 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
1620 size * sizeof(Glyph));
1621 tclearregion(src, term.c.y, dst - 1, term.c.y);
1622 }
1623
1624 void
1625 tinsertblankline(int n) {
1626 if(term.c.y < term.top || term.c.y > term.bot)
1627 return;
1628
1629 tscrolldown(term.c.y, n);
1630 }
1631
1632 void
1633 tdeleteline(int n) {
1634 if(term.c.y < term.top || term.c.y > term.bot)
1635 return;
1636
1637 tscrollup(term.c.y, n);
1638 }
1639
1640 long
1641 tdefcolor(int *attr, int *npar, int l) {
1642 long idx = -1;
1643 uint r, g, b;
1644
1645 switch (attr[*npar + 1]) {
1646 case 2: /* direct colour in RGB space */
1647 if (*npar + 4 >= l) {
1648 fprintf(stderr,
1649 "erresc(38): Incorrect number of parameters (%d)\n",
1650 *npar);
1651 break;
1652 }
1653 r = attr[*npar + 2];
1654 g = attr[*npar + 3];
1655 b = attr[*npar + 4];
1656 *npar += 4;
1657 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1658 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1659 r, g, b);
1660 else
1661 idx = TRUECOLOR(r, g, b);
1662 break;
1663 case 5: /* indexed colour */
1664 if (*npar + 2 >= l) {
1665 fprintf(stderr,
1666 "erresc(38): Incorrect number of parameters (%d)\n",
1667 *npar);
1668 break;
1669 }
1670 *npar += 2;
1671 if(!BETWEEN(attr[*npar], 0, 255))
1672 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1673 else
1674 idx = attr[*npar];
1675 break;
1676 case 0: /* implemented defined (only foreground) */
1677 case 1: /* transparent */
1678 case 3: /* direct colour in CMY space */
1679 case 4: /* direct colour in CMYK space */
1680 default:
1681 fprintf(stderr,
1682 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1683 }
1684
1685 return idx;
1686 }
1687
1688 void
1689 tsetattr(int *attr, int l) {
1690 int i;
1691 long idx;
1692
1693 for(i = 0; i < l; i++) {
1694 switch(attr[i]) {
1695 case 0:
1696 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1697 | ATTR_BOLD | ATTR_ITALIC \
1698 | ATTR_BLINK);
1699 term.c.attr.fg = defaultfg;
1700 term.c.attr.bg = defaultbg;
1701 break;
1702 case 1:
1703 term.c.attr.mode |= ATTR_BOLD;
1704 break;
1705 case 3:
1706 term.c.attr.mode |= ATTR_ITALIC;
1707 break;
1708 case 4:
1709 term.c.attr.mode |= ATTR_UNDERLINE;
1710 break;
1711 case 5: /* slow blink */
1712 case 6: /* rapid blink */
1713 term.c.attr.mode |= ATTR_BLINK;
1714 break;
1715 case 7:
1716 term.c.attr.mode |= ATTR_REVERSE;
1717 break;
1718 case 21:
1719 case 22:
1720 term.c.attr.mode &= ~ATTR_BOLD;
1721 break;
1722 case 23:
1723 term.c.attr.mode &= ~ATTR_ITALIC;
1724 break;
1725 case 24:
1726 term.c.attr.mode &= ~ATTR_UNDERLINE;
1727 break;
1728 case 25:
1729 case 26:
1730 term.c.attr.mode &= ~ATTR_BLINK;
1731 break;
1732 case 27:
1733 term.c.attr.mode &= ~ATTR_REVERSE;
1734 break;
1735 case 38:
1736 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1737 term.c.attr.fg = idx;
1738 break;
1739 case 39:
1740 term.c.attr.fg = defaultfg;
1741 break;
1742 case 48:
1743 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1744 term.c.attr.bg = idx;
1745 break;
1746 case 49:
1747 term.c.attr.bg = defaultbg;
1748 break;
1749 default:
1750 if(BETWEEN(attr[i], 30, 37)) {
1751 term.c.attr.fg = attr[i] - 30;
1752 } else if(BETWEEN(attr[i], 40, 47)) {
1753 term.c.attr.bg = attr[i] - 40;
1754 } else if(BETWEEN(attr[i], 90, 97)) {
1755 term.c.attr.fg = attr[i] - 90 + 8;
1756 } else if(BETWEEN(attr[i], 100, 107)) {
1757 term.c.attr.bg = attr[i] - 100 + 8;
1758 } else {
1759 fprintf(stderr,
1760 "erresc(default): gfx attr %d unknown\n",
1761 attr[i]), csidump();
1762 }
1763 break;
1764 }
1765 }
1766 }
1767
1768 void
1769 tsetscroll(int t, int b) {
1770 int temp;
1771
1772 LIMIT(t, 0, term.row-1);
1773 LIMIT(b, 0, term.row-1);
1774 if(t > b) {
1775 temp = t;
1776 t = b;
1777 b = temp;
1778 }
1779 term.top = t;
1780 term.bot = b;
1781 }
1782
1783 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1784
1785 void
1786 tsetmode(bool priv, bool set, int *args, int narg) {
1787 int *lim, mode;
1788 bool alt;
1789
1790 for(lim = args + narg; args < lim; ++args) {
1791 if(priv) {
1792 switch(*args) {
1793 break;
1794 case 1: /* DECCKM -- Cursor key */
1795 MODBIT(term.mode, set, MODE_APPCURSOR);
1796 break;
1797 case 5: /* DECSCNM -- Reverse video */
1798 mode = term.mode;
1799 MODBIT(term.mode, set, MODE_REVERSE);
1800 if(mode != term.mode)
1801 redraw(REDRAW_TIMEOUT);
1802 break;
1803 case 6: /* DECOM -- Origin */
1804 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1805 tmoveato(0, 0);
1806 break;
1807 case 7: /* DECAWM -- Auto wrap */
1808 MODBIT(term.mode, set, MODE_WRAP);
1809 break;
1810 case 0: /* Error (IGNORED) */
1811 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1812 case 3: /* DECCOLM -- Column (IGNORED) */
1813 case 4: /* DECSCLM -- Scroll (IGNORED) */
1814 case 8: /* DECARM -- Auto repeat (IGNORED) */
1815 case 18: /* DECPFF -- Printer feed (IGNORED) */
1816 case 19: /* DECPEX -- Printer extent (IGNORED) */
1817 case 42: /* DECNRCM -- National characters (IGNORED) */
1818 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1819 break;
1820 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1821 MODBIT(term.mode, !set, MODE_HIDE);
1822 break;
1823 case 9: /* X10 mouse compatibility mode */
1824 xsetpointermotion(0);
1825 MODBIT(term.mode, 0, MODE_MOUSE);
1826 MODBIT(term.mode, set, MODE_MOUSEX10);
1827 break;
1828 case 1000: /* 1000: report button press */
1829 xsetpointermotion(0);
1830 MODBIT(term.mode, 0, MODE_MOUSE);
1831 MODBIT(term.mode, set, MODE_MOUSEBTN);
1832 break;
1833 case 1002: /* 1002: report motion on button press */
1834 xsetpointermotion(0);
1835 MODBIT(term.mode, 0, MODE_MOUSE);
1836 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1837 break;
1838 case 1003: /* 1003: enable all mouse motions */
1839 xsetpointermotion(set);
1840 MODBIT(term.mode, 0, MODE_MOUSE);
1841 MODBIT(term.mode, set, MODE_MOUSEMANY);
1842 break;
1843 case 1004: /* 1004: send focus events to tty */
1844 MODBIT(term.mode, set, MODE_FOCUS);
1845 break;
1846 case 1006: /* 1006: extended reporting mode */
1847 MODBIT(term.mode, set, MODE_MOUSESGR);
1848 break;
1849 case 1034:
1850 MODBIT(term.mode, set, MODE_8BIT);
1851 break;
1852 case 1049: /* = 1047 and 1048 */
1853 case 47:
1854 case 1047:
1855 if (!allowaltscreen)
1856 break;
1857
1858 alt = IS_SET(MODE_ALTSCREEN);
1859 if(alt) {
1860 tclearregion(0, 0, term.col-1,
1861 term.row-1);
1862 }
1863 if(set ^ alt) /* set is always 1 or 0 */
1864 tswapscreen();
1865 if(*args != 1049)
1866 break;
1867 /* FALLTRU */
1868 case 1048:
1869 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1870 break;
1871 /* Not implemented mouse modes. See comments there. */
1872 case 1001: /* mouse highlight mode; can hang the
1873 terminal by design when implemented. */
1874 case 1005: /* UTF-8 mouse mode; will confuse
1875 applications not supporting UTF-8
1876 and luit. */
1877 case 1015: /* urxvt mangled mouse mode; incompatible
1878 and can be mistaken for other control
1879 codes. */
1880 default:
1881 fprintf(stderr,
1882 "erresc: unknown private set/reset mode %d\n",
1883 *args);
1884 break;
1885 }
1886 } else {
1887 switch(*args) {
1888 case 0: /* Error (IGNORED) */
1889 break;
1890 case 2: /* KAM -- keyboard action */
1891 MODBIT(term.mode, set, MODE_KBDLOCK);
1892 break;
1893 case 4: /* IRM -- Insertion-replacement */
1894 MODBIT(term.mode, set, MODE_INSERT);
1895 break;
1896 case 12: /* SRM -- Send/Receive */
1897 MODBIT(term.mode, !set, MODE_ECHO);
1898 break;
1899 case 20: /* LNM -- Linefeed/new line */
1900 MODBIT(term.mode, set, MODE_CRLF);
1901 break;
1902 default:
1903 fprintf(stderr,
1904 "erresc: unknown set/reset mode %d\n",
1905 *args);
1906 break;
1907 }
1908 }
1909 }
1910 }
1911
1912 void
1913 csihandle(void) {
1914 switch(csiescseq.mode) {
1915 default:
1916 unknown:
1917 fprintf(stderr, "erresc: unknown csi ");
1918 csidump();
1919 /* die(""); */
1920 break;
1921 case '@': /* ICH -- Insert <n> blank char */
1922 DEFAULT(csiescseq.arg[0], 1);
1923 tinsertblank(csiescseq.arg[0]);
1924 break;
1925 case 'A': /* CUU -- Cursor <n> Up */
1926 DEFAULT(csiescseq.arg[0], 1);
1927 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1928 break;
1929 case 'B': /* CUD -- Cursor <n> Down */
1930 case 'e': /* VPR --Cursor <n> Down */
1931 DEFAULT(csiescseq.arg[0], 1);
1932 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1933 break;
1934 case 'c': /* DA -- Device Attributes */
1935 if(csiescseq.arg[0] == 0)
1936 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1937 break;
1938 case 'C': /* CUF -- Cursor <n> Forward */
1939 case 'a': /* HPR -- Cursor <n> Forward */
1940 DEFAULT(csiescseq.arg[0], 1);
1941 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1942 break;
1943 case 'D': /* CUB -- Cursor <n> Backward */
1944 DEFAULT(csiescseq.arg[0], 1);
1945 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1946 break;
1947 case 'E': /* CNL -- Cursor <n> Down and first col */
1948 DEFAULT(csiescseq.arg[0], 1);
1949 tmoveto(0, term.c.y+csiescseq.arg[0]);
1950 break;
1951 case 'F': /* CPL -- Cursor <n> Up and first col */
1952 DEFAULT(csiescseq.arg[0], 1);
1953 tmoveto(0, term.c.y-csiescseq.arg[0]);
1954 break;
1955 case 'g': /* TBC -- Tabulation clear */
1956 switch(csiescseq.arg[0]) {
1957 case 0: /* clear current tab stop */
1958 term.tabs[term.c.x] = 0;
1959 break;
1960 case 3: /* clear all the tabs */
1961 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1962 break;
1963 default:
1964 goto unknown;
1965 }
1966 break;
1967 case 'G': /* CHA -- Move to <col> */
1968 case '`': /* HPA */
1969 DEFAULT(csiescseq.arg[0], 1);
1970 tmoveto(csiescseq.arg[0]-1, term.c.y);
1971 break;
1972 case 'H': /* CUP -- Move to <row> <col> */
1973 case 'f': /* HVP */
1974 DEFAULT(csiescseq.arg[0], 1);
1975 DEFAULT(csiescseq.arg[1], 1);
1976 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1977 break;
1978 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1979 DEFAULT(csiescseq.arg[0], 1);
1980 while(csiescseq.arg[0]--)
1981 tputtab(1);
1982 break;
1983 case 'J': /* ED -- Clear screen */
1984 selclear(NULL);
1985 switch(csiescseq.arg[0]) {
1986 case 0: /* below */
1987 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1988 if(term.c.y < term.row-1) {
1989 tclearregion(0, term.c.y+1, term.col-1,
1990 term.row-1);
1991 }
1992 break;
1993 case 1: /* above */
1994 if(term.c.y > 1)
1995 tclearregion(0, 0, term.col-1, term.c.y-1);
1996 tclearregion(0, term.c.y, term.c.x, term.c.y);
1997 break;
1998 case 2: /* all */
1999 tclearregion(0, 0, term.col-1, term.row-1);
2000 break;
2001 default:
2002 goto unknown;
2003 }
2004 break;
2005 case 'K': /* EL -- Clear line */
2006 switch(csiescseq.arg[0]) {
2007 case 0: /* right */
2008 tclearregion(term.c.x, term.c.y, term.col-1,
2009 term.c.y);
2010 break;
2011 case 1: /* left */
2012 tclearregion(0, term.c.y, term.c.x, term.c.y);
2013 break;
2014 case 2: /* all */
2015 tclearregion(0, term.c.y, term.col-1, term.c.y);
2016 break;
2017 }
2018 break;
2019 case 'S': /* SU -- Scroll <n> line up */
2020 DEFAULT(csiescseq.arg[0], 1);
2021 tscrollup(term.top, csiescseq.arg[0]);
2022 break;
2023 case 'T': /* SD -- Scroll <n> line down */
2024 DEFAULT(csiescseq.arg[0], 1);
2025 tscrolldown(term.top, csiescseq.arg[0]);
2026 break;
2027 case 'L': /* IL -- Insert <n> blank lines */
2028 DEFAULT(csiescseq.arg[0], 1);
2029 tinsertblankline(csiescseq.arg[0]);
2030 break;
2031 case 'l': /* RM -- Reset Mode */
2032 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2033 break;
2034 case 'M': /* DL -- Delete <n> lines */
2035 DEFAULT(csiescseq.arg[0], 1);
2036 tdeleteline(csiescseq.arg[0]);
2037 break;
2038 case 'X': /* ECH -- Erase <n> char */
2039 DEFAULT(csiescseq.arg[0], 1);
2040 tclearregion(term.c.x, term.c.y,
2041 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2042 break;
2043 case 'P': /* DCH -- Delete <n> char */
2044 DEFAULT(csiescseq.arg[0], 1);
2045 tdeletechar(csiescseq.arg[0]);
2046 break;
2047 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2048 DEFAULT(csiescseq.arg[0], 1);
2049 while(csiescseq.arg[0]--)
2050 tputtab(0);
2051 break;
2052 case 'd': /* VPA -- Move to <row> */
2053 DEFAULT(csiescseq.arg[0], 1);
2054 tmoveato(term.c.x, csiescseq.arg[0]-1);
2055 break;
2056 case 'h': /* SM -- Set terminal mode */
2057 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2058 break;
2059 case 'm': /* SGR -- Terminal attribute (color) */
2060 tsetattr(csiescseq.arg, csiescseq.narg);
2061 break;
2062 case 'r': /* DECSTBM -- Set Scrolling Region */
2063 if(csiescseq.priv) {
2064 goto unknown;
2065 } else {
2066 DEFAULT(csiescseq.arg[0], 1);
2067 DEFAULT(csiescseq.arg[1], term.row);
2068 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2069 tmoveato(0, 0);
2070 }
2071 break;
2072 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2073 tcursor(CURSOR_SAVE);
2074 break;
2075 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2076 tcursor(CURSOR_LOAD);
2077 break;
2078 }
2079 }
2080
2081 void
2082 csidump(void) {
2083 int i;
2084 uint c;
2085
2086 printf("ESC[");
2087 for(i = 0; i < csiescseq.len; i++) {
2088 c = csiescseq.buf[i] & 0xff;
2089 if(isprint(c)) {
2090 putchar(c);
2091 } else if(c == '\n') {
2092 printf("(\\n)");
2093 } else if(c == '\r') {
2094 printf("(\\r)");
2095 } else if(c == 0x1b) {
2096 printf("(\\e)");
2097 } else {
2098 printf("(%02x)", c);
2099 }
2100 }
2101 putchar('\n');
2102 }
2103
2104 void
2105 csireset(void) {
2106 memset(&csiescseq, 0, sizeof(csiescseq));
2107 }
2108
2109 void
2110 strhandle(void) {
2111 char *p = NULL;
2112 int i, j, narg;
2113
2114 strparse();
2115 narg = strescseq.narg;
2116
2117 switch(strescseq.type) {
2118 case ']': /* OSC -- Operating System Command */
2119 switch(i = atoi(strescseq.args[0])) {
2120 case 0:
2121 case 1:
2122 case 2:
2123 if(narg > 1)
2124 xsettitle(strescseq.args[1]);
2125 break;
2126 case 4: /* color set */
2127 if(narg < 3)
2128 break;
2129 p = strescseq.args[2];
2130 /* fall through */
2131 case 104: /* color reset, here p = NULL */
2132 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2133 if (!xsetcolorname(j, p)) {
2134 fprintf(stderr, "erresc: invalid color %s\n", p);
2135 } else {
2136 /*
2137 * TODO if defaultbg color is changed, borders
2138 * are dirty
2139 */
2140 redraw(0);
2141 }
2142 break;
2143 default:
2144 fprintf(stderr, "erresc: unknown str ");
2145 strdump();
2146 break;
2147 }
2148 break;
2149 case 'k': /* old title set compatibility */
2150 xsettitle(strescseq.args[0]);
2151 break;
2152 case 'P': /* DSC -- Device Control String */
2153 case '_': /* APC -- Application Program Command */
2154 case '^': /* PM -- Privacy Message */
2155 default:
2156 fprintf(stderr, "erresc: unknown str ");
2157 strdump();
2158 /* die(""); */
2159 break;
2160 }
2161 }
2162
2163 void
2164 strparse(void) {
2165 char *p = strescseq.buf;
2166
2167 strescseq.narg = 0;
2168 strescseq.buf[strescseq.len] = '\0';
2169 while(p && strescseq.narg < STR_ARG_SIZ)
2170 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2171 }
2172
2173 void
2174 strdump(void) {
2175 int i;
2176 uint c;
2177
2178 printf("ESC%c", strescseq.type);
2179 for(i = 0; i < strescseq.len; i++) {
2180 c = strescseq.buf[i] & 0xff;
2181 if(c == '\0') {
2182 return;
2183 } else if(isprint(c)) {
2184 putchar(c);
2185 } else if(c == '\n') {
2186 printf("(\\n)");
2187 } else if(c == '\r') {
2188 printf("(\\r)");
2189 } else if(c == 0x1b) {
2190 printf("(\\e)");
2191 } else {
2192 printf("(%02x)", c);
2193 }
2194 }
2195 printf("ESC\\\n");
2196 }
2197
2198 void
2199 strreset(void) {
2200 memset(&strescseq, 0, sizeof(strescseq));
2201 }
2202
2203 void
2204 tputtab(bool forward) {
2205 uint x = term.c.x;
2206
2207 if(forward) {
2208 if(x == term.col)
2209 return;
2210 for(++x; x < term.col && !term.tabs[x]; ++x)
2211 /* nothing */ ;
2212 } else {
2213 if(x == 0)
2214 return;
2215 for(--x; x > 0 && !term.tabs[x]; --x)
2216 /* nothing */ ;
2217 }
2218 tmoveto(x, term.c.y);
2219 }
2220
2221 void
2222 techo(char *buf, int len) {
2223 for(; len > 0; buf++, len--) {
2224 char c = *buf;
2225
2226 if(c == '\033') { /* escape */
2227 tputc("^", 1);
2228 tputc("[", 1);
2229 } else if(c < '\x20') { /* control code */
2230 if(c != '\n' && c != '\r' && c != '\t') {
2231 c |= '\x40';
2232 tputc("^", 1);
2233 }
2234 tputc(&c, 1);
2235 } else {
2236 break;
2237 }
2238 }
2239 if(len)
2240 tputc(buf, len);
2241 }
2242
2243 void
2244 tputc(char *c, int len) {
2245 uchar ascii = *c;
2246 bool control = ascii < '\x20' || ascii == 0177;
2247 long u8char;
2248 int width;
2249
2250 if(len == 1) {
2251 width = 1;
2252 } else {
2253 utf8decode(c, &u8char);
2254 width = wcwidth(u8char);
2255 }
2256
2257 if(iofd != -1) {
2258 if(xwrite(iofd, c, len) < 0) {
2259 fprintf(stderr, "Error writing in %s:%s\n",
2260 opt_io, strerror(errno));
2261 close(iofd);
2262 iofd = -1;
2263 }
2264 }
2265
2266 /*
2267 * STR sequences must be checked before anything else
2268 * because it can use some control codes as part of the sequence.
2269 */
2270 if(term.esc & ESC_STR) {
2271 switch(ascii) {
2272 case '\033':
2273 term.esc = ESC_START | ESC_STR_END;
2274 break;
2275 case '\a': /* backwards compatibility to xterm */
2276 term.esc = 0;
2277 strhandle();
2278 break;
2279 default:
2280 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2281 memmove(&strescseq.buf[strescseq.len], c, len);
2282 strescseq.len += len;
2283 } else {
2284 /*
2285 * Here is a bug in terminals. If the user never sends
2286 * some code to stop the str or esc command, then st
2287 * will stop responding. But this is better than
2288 * silently failing with unknown characters. At least
2289 * then users will report back.
2290 *
2291 * In the case users ever get fixed, here is the code:
2292 */
2293 /*
2294 * term.esc = 0;
2295 * strhandle();
2296 */
2297 }
2298 }
2299 return;
2300 }
2301
2302 /*
2303 * Actions of control codes must be performed as soon they arrive
2304 * because they can be embedded inside a control sequence, and
2305 * they must not cause conflicts with sequences.
2306 */
2307 if(control) {
2308 switch(ascii) {
2309 case '\t': /* HT */
2310 tputtab(1);
2311 return;
2312 case '\b': /* BS */
2313 tmoveto(term.c.x-1, term.c.y);
2314 return;
2315 case '\r': /* CR */
2316 tmoveto(0, term.c.y);
2317 return;
2318 case '\f': /* LF */
2319 case '\v': /* VT */
2320 case '\n': /* LF */
2321 /* go to first col if the mode is set */
2322 tnewline(IS_SET(MODE_CRLF));
2323 return;
2324 case '\a': /* BEL */
2325 if(!(xw.state & WIN_FOCUSED))
2326 xseturgency(1);
2327 if (bellvolume)
2328 XBell(xw.dpy, bellvolume);
2329 return;
2330 case '\033': /* ESC */
2331 csireset();
2332 term.esc = ESC_START;
2333 return;
2334 case '\016': /* SO */
2335 case '\017': /* SI */
2336 /*
2337 * Different charsets are hard to handle. Applications
2338 * should use the right alt charset escapes for the
2339 * only reason they still exist: line drawing. The
2340 * rest is incompatible history st should not support.
2341 */
2342 return;
2343 case '\032': /* SUB */
2344 case '\030': /* CAN */
2345 csireset();
2346 return;
2347 case '\005': /* ENQ (IGNORED) */
2348 case '\000': /* NUL (IGNORED) */
2349 case '\021': /* XON (IGNORED) */
2350 case '\023': /* XOFF (IGNORED) */
2351 case 0177: /* DEL (IGNORED) */
2352 return;
2353 }
2354 } else if(term.esc & ESC_START) {
2355 if(term.esc & ESC_CSI) {
2356 csiescseq.buf[csiescseq.len++] = ascii;
2357 if(BETWEEN(ascii, 0x40, 0x7E)
2358 || csiescseq.len >= \
2359 sizeof(csiescseq.buf)-1) {
2360 term.esc = 0;
2361 csiparse();
2362 csihandle();
2363 }
2364 } else if(term.esc & ESC_STR_END) {
2365 term.esc = 0;
2366 if(ascii == '\\')
2367 strhandle();
2368 } else if(term.esc & ESC_ALTCHARSET) {
2369 switch(ascii) {
2370 case '0': /* Line drawing set */
2371 term.c.attr.mode |= ATTR_GFX;
2372 break;
2373 case 'B': /* USASCII */
2374 term.c.attr.mode &= ~ATTR_GFX;
2375 break;
2376 case 'A': /* UK (IGNORED) */
2377 case '<': /* multinational charset (IGNORED) */
2378 case '5': /* Finnish (IGNORED) */
2379 case 'C': /* Finnish (IGNORED) */
2380 case 'K': /* German (IGNORED) */
2381 break;
2382 default:
2383 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2384 }
2385 term.esc = 0;
2386 } else if(term.esc & ESC_TEST) {
2387 if(ascii == '8') { /* DEC screen alignment test. */
2388 char E[UTF_SIZ] = "E";
2389 int x, y;
2390
2391 for(x = 0; x < term.col; ++x) {
2392 for(y = 0; y < term.row; ++y)
2393 tsetchar(E, &term.c.attr, x, y);
2394 }
2395 }
2396 term.esc = 0;
2397 } else {
2398 switch(ascii) {
2399 case '[':
2400 term.esc |= ESC_CSI;
2401 break;
2402 case '#':
2403 term.esc |= ESC_TEST;
2404 break;
2405 case 'P': /* DCS -- Device Control String */
2406 case '_': /* APC -- Application Program Command */
2407 case '^': /* PM -- Privacy Message */
2408 case ']': /* OSC -- Operating System Command */
2409 case 'k': /* old title set compatibility */
2410 strreset();
2411 strescseq.type = ascii;
2412 term.esc |= ESC_STR;
2413 break;
2414 case '(': /* set primary charset G0 */
2415 term.esc |= ESC_ALTCHARSET;
2416 break;
2417 case ')': /* set secondary charset G1 (IGNORED) */
2418 case '*': /* set tertiary charset G2 (IGNORED) */
2419 case '+': /* set quaternary charset G3 (IGNORED) */
2420 term.esc = 0;
2421 break;
2422 case 'D': /* IND -- Linefeed */
2423 if(term.c.y == term.bot) {
2424 tscrollup(term.top, 1);
2425 } else {
2426 tmoveto(term.c.x, term.c.y+1);
2427 }
2428 term.esc = 0;
2429 break;
2430 case 'E': /* NEL -- Next line */
2431 tnewline(1); /* always go to first col */
2432 term.esc = 0;
2433 break;
2434 case 'H': /* HTS -- Horizontal tab stop */
2435 term.tabs[term.c.x] = 1;
2436 term.esc = 0;
2437 break;
2438 case 'M': /* RI -- Reverse index */
2439 if(term.c.y == term.top) {
2440 tscrolldown(term.top, 1);
2441 } else {
2442 tmoveto(term.c.x, term.c.y-1);
2443 }
2444 term.esc = 0;
2445 break;
2446 case 'Z': /* DECID -- Identify Terminal */
2447 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2448 term.esc = 0;
2449 break;
2450 case 'c': /* RIS -- Reset to inital state */
2451 treset();
2452 term.esc = 0;
2453 xresettitle();
2454 xloadcols();
2455 break;
2456 case '=': /* DECPAM -- Application keypad */
2457 term.mode |= MODE_APPKEYPAD;
2458 term.esc = 0;
2459 break;
2460 case '>': /* DECPNM -- Normal keypad */
2461 term.mode &= ~MODE_APPKEYPAD;
2462 term.esc = 0;
2463 break;
2464 case '7': /* DECSC -- Save Cursor */
2465 tcursor(CURSOR_SAVE);
2466 term.esc = 0;
2467 break;
2468 case '8': /* DECRC -- Restore Cursor */
2469 tcursor(CURSOR_LOAD);
2470 term.esc = 0;
2471 break;
2472 case '\\': /* ST -- Stop */
2473 term.esc = 0;
2474 break;
2475 default:
2476 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2477 (uchar) ascii, isprint(ascii)? ascii:'.');
2478 term.esc = 0;
2479 }
2480 }
2481 /*
2482 * All characters which form part of a sequence are not
2483 * printed
2484 */
2485 return;
2486 }
2487 /*
2488 * Display control codes only if we are in graphic mode
2489 */
2490 if(control && !(term.c.attr.mode & ATTR_GFX))
2491 return;
2492 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2493 selclear(NULL);
2494 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2495 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2496 tnewline(1);
2497 }
2498
2499 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2500 memmove(&term.line[term.c.y][term.c.x+1],
2501 &term.line[term.c.y][term.c.x],
2502 (term.col - term.c.x - 1) * sizeof(Glyph));
2503 }
2504
2505 if(term.c.x+width > term.col)
2506 tnewline(1);
2507
2508 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2509
2510 if(width == 2) {
2511 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2512 if(term.c.x+1 < term.col) {
2513 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2514 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2515 }
2516 }
2517 if(term.c.x+width < term.col) {
2518 tmoveto(term.c.x+width, term.c.y);
2519 } else {
2520 term.c.state |= CURSOR_WRAPNEXT;
2521 }
2522 }
2523
2524 int
2525 tresize(int col, int row) {
2526 int i;
2527 int minrow = MIN(row, term.row);
2528 int mincol = MIN(col, term.col);
2529 int slide = term.c.y - row + 1;
2530 bool *bp;
2531 Line *orig;
2532
2533 if(col < 1 || row < 1)
2534 return 0;
2535
2536 /* free unneeded rows */
2537 i = 0;
2538 if(slide > 0) {
2539 /*
2540 * slide screen to keep cursor where we expect it -
2541 * tscrollup would work here, but we can optimize to
2542 * memmove because we're freeing the earlier lines
2543 */
2544 for(/* i = 0 */; i < slide; i++) {
2545 free(term.line[i]);
2546 free(term.alt[i]);
2547 }
2548 memmove(term.line, term.line + slide, row * sizeof(Line));
2549 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2550 }
2551 for(i += row; i < term.row; i++) {
2552 free(term.line[i]);
2553 free(term.alt[i]);
2554 }
2555
2556 /* resize to new height */
2557 term.line = xrealloc(term.line, row * sizeof(Line));
2558 term.alt = xrealloc(term.alt, row * sizeof(Line));
2559 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2560 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2561
2562 /* resize each row to new width, zero-pad if needed */
2563 for(i = 0; i < minrow; i++) {
2564 term.dirty[i] = 1;
2565 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2566 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2567 }
2568
2569 /* allocate any new rows */
2570 for(/* i == minrow */; i < row; i++) {
2571 term.dirty[i] = 1;
2572 term.line[i] = xmalloc(col * sizeof(Glyph));
2573 term.alt[i] = xmalloc(col * sizeof(Glyph));
2574 }
2575 if(col > term.col) {
2576 bp = term.tabs + term.col;
2577
2578 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2579 while(--bp > term.tabs && !*bp)
2580 /* nothing */ ;
2581 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2582 *bp = 1;
2583 }
2584 /* update terminal size */
2585 term.col = col;
2586 term.row = row;
2587 /* reset scrolling region */
2588 tsetscroll(0, row-1);
2589 /* make use of the LIMIT in tmoveto */
2590 tmoveto(term.c.x, term.c.y);
2591 /* Clearing both screens */
2592 orig = term.line;
2593 do {
2594 if(mincol < col && 0 < minrow) {
2595 tclearregion(mincol, 0, col - 1, minrow - 1);
2596 }
2597 if(0 < col && minrow < row) {
2598 tclearregion(0, minrow, col - 1, row - 1);
2599 }
2600 tswapscreen();
2601 } while(orig != term.line);
2602
2603 return (slide > 0);
2604 }
2605
2606 void
2607 xresize(int col, int row) {
2608 xw.tw = MAX(1, col * xw.cw);
2609 xw.th = MAX(1, row * xw.ch);
2610
2611 XFreePixmap(xw.dpy, xw.buf);
2612 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2613 DefaultDepth(xw.dpy, xw.scr));
2614 XftDrawChange(xw.draw, xw.buf);
2615 xclear(0, 0, xw.w, xw.h);
2616 }
2617
2618 static inline ushort
2619 sixd_to_16bit(int x) {
2620 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2621 }
2622
2623 void
2624 xloadcols(void) {
2625 int i, r, g, b;
2626 XRenderColor color = { .alpha = 0xffff };
2627 static bool loaded;
2628 Colour *cp;
2629
2630 if(loaded) {
2631 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2632 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2633 }
2634
2635 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2636 for(i = 0; i < LEN(colorname); i++) {
2637 if(!colorname[i])
2638 continue;
2639 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2640 die("Could not allocate color '%s'\n", colorname[i]);
2641 }
2642 }
2643
2644 /* load colors [16-255] ; same colors as xterm */
2645 for(i = 16, r = 0; r < 6; r++) {
2646 for(g = 0; g < 6; g++) {
2647 for(b = 0; b < 6; b++) {
2648 color.red = sixd_to_16bit(r);
2649 color.green = sixd_to_16bit(g);
2650 color.blue = sixd_to_16bit(b);
2651 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2652 die("Could not allocate color %d\n", i);
2653 }
2654 i++;
2655 }
2656 }
2657 }
2658
2659 for(r = 0; r < 24; r++, i++) {
2660 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2661 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2662 &dc.col[i])) {
2663 die("Could not allocate color %d\n", i);
2664 }
2665 }
2666 loaded = true;
2667 }
2668
2669 int
2670 xsetcolorname(int x, const char *name) {
2671 XRenderColor color = { .alpha = 0xffff };
2672 Colour colour;
2673 if (x < 0 || x > LEN(colorname))
2674 return -1;
2675 if(!name) {
2676 if(16 <= x && x < 16 + 216) {
2677 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2678 color.red = sixd_to_16bit(r);
2679 color.green = sixd_to_16bit(g);
2680 color.blue = sixd_to_16bit(b);
2681 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2682 return 0; /* something went wrong */
2683 dc.col[x] = colour;
2684 return 1;
2685 } else if (16 + 216 <= x && x < 256) {
2686 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2687 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2688 return 0; /* something went wrong */
2689 dc.col[x] = colour;
2690 return 1;
2691 } else {
2692 name = colorname[x];
2693 }
2694 }
2695 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2696 return 0;
2697 dc.col[x] = colour;
2698 return 1;
2699 }
2700
2701 void
2702 xtermclear(int col1, int row1, int col2, int row2) {
2703 XftDrawRect(xw.draw,
2704 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2705 borderpx + col1 * xw.cw,
2706 borderpx + row1 * xw.ch,
2707 (col2-col1+1) * xw.cw,
2708 (row2-row1+1) * xw.ch);
2709 }
2710
2711 /*
2712 * Absolute coordinates.
2713 */
2714 void
2715 xclear(int x1, int y1, int x2, int y2) {
2716 XftDrawRect(xw.draw,
2717 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2718 x1, y1, x2-x1, y2-y1);
2719 }
2720
2721 void
2722 xhints(void) {
2723 XClassHint class = {opt_class ? opt_class : termname, termname};
2724 XWMHints wm = {.flags = InputHint, .input = 1};
2725 XSizeHints *sizeh = NULL;
2726
2727 sizeh = XAllocSizeHints();
2728 if(xw.isfixed == False) {
2729 sizeh->flags = PSize | PResizeInc | PBaseSize;
2730 sizeh->height = xw.h;
2731 sizeh->width = xw.w;
2732 sizeh->height_inc = xw.ch;
2733 sizeh->width_inc = xw.cw;
2734 sizeh->base_height = 2 * borderpx;
2735 sizeh->base_width = 2 * borderpx;
2736 } else {
2737 sizeh->flags = PMaxSize | PMinSize;
2738 sizeh->min_width = sizeh->max_width = xw.fw;
2739 sizeh->min_height = sizeh->max_height = xw.fh;
2740 }
2741
2742 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
2743 XFree(sizeh);
2744 }
2745
2746 int
2747 xloadfont(Font *f, FcPattern *pattern) {
2748 FcPattern *match;
2749 FcResult result;
2750
2751 match = FcFontMatch(NULL, pattern, &result);
2752 if(!match)
2753 return 1;
2754
2755 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2756 FcPatternDestroy(match);
2757 return 1;
2758 }
2759
2760 f->set = NULL;
2761 f->pattern = FcPatternDuplicate(pattern);
2762
2763 f->ascent = f->match->ascent;
2764 f->descent = f->match->descent;
2765 f->lbearing = 0;
2766 f->rbearing = f->match->max_advance_width;
2767
2768 f->height = f->ascent + f->descent;
2769 f->width = f->lbearing + f->rbearing;
2770
2771 return 0;
2772 }
2773
2774 void
2775 xloadfonts(char *fontstr, int fontsize) {
2776 FcPattern *pattern;
2777 FcResult result;
2778 double fontval;
2779
2780 if(fontstr[0] == '-') {
2781 pattern = XftXlfdParse(fontstr, False, False);
2782 } else {
2783 pattern = FcNameParse((FcChar8 *)fontstr);
2784 }
2785
2786 if(!pattern)
2787 die("st: can't open font %s\n", fontstr);
2788
2789 if(fontsize > 0) {
2790 FcPatternDel(pattern, FC_PIXEL_SIZE);
2791 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2792 usedfontsize = fontsize;
2793 } else {
2794 result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2795 if(result == FcResultMatch) {
2796 usedfontsize = (int)fontval;
2797 } else {
2798 /*
2799 * Default font size is 12, if none given. This is to
2800 * have a known usedfontsize value.
2801 */
2802 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2803 usedfontsize = 12;
2804 }
2805 }
2806
2807 FcConfigSubstitute(0, pattern, FcMatchPattern);
2808 FcDefaultSubstitute(pattern);
2809
2810 if(xloadfont(&dc.font, pattern))
2811 die("st: can't open font %s\n", fontstr);
2812
2813 /* Setting character width and height. */
2814 xw.cw = CEIL(dc.font.width * cwscale);
2815 xw.ch = CEIL(dc.font.height * chscale);
2816
2817 FcPatternDel(pattern, FC_SLANT);
2818 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2819 if(xloadfont(&dc.ifont, pattern))
2820 die("st: can't open font %s\n", fontstr);
2821
2822 FcPatternDel(pattern, FC_WEIGHT);
2823 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2824 if(xloadfont(&dc.ibfont, pattern))
2825 die("st: can't open font %s\n", fontstr);
2826
2827 FcPatternDel(pattern, FC_SLANT);
2828 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2829 if(xloadfont(&dc.bfont, pattern))
2830 die("st: can't open font %s\n", fontstr);
2831
2832 FcPatternDestroy(pattern);
2833 }
2834
2835 int
2836 xloadfontset(Font *f) {
2837 FcResult result;
2838
2839 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2840 return 1;
2841 return 0;
2842 }
2843
2844 void
2845 xunloadfont(Font *f) {
2846 XftFontClose(xw.dpy, f->match);
2847 FcPatternDestroy(f->pattern);
2848 if(f->set)
2849 FcFontSetDestroy(f->set);
2850 }
2851
2852 void
2853 xunloadfonts(void) {
2854 int i;
2855
2856 /* Free the loaded fonts in the font cache. */
2857 for(i = 0; i < frclen; i++) {
2858 XftFontClose(xw.dpy, frc[i].font);
2859 }
2860 frclen = 0;
2861
2862 xunloadfont(&dc.font);
2863 xunloadfont(&dc.bfont);
2864 xunloadfont(&dc.ifont);
2865 xunloadfont(&dc.ibfont);
2866 }
2867
2868 void
2869 xzoom(const Arg *arg) {
2870 xunloadfonts();
2871 xloadfonts(usedfont, usedfontsize + arg->i);
2872 cresize(0, 0);
2873 redraw(0);
2874 }
2875
2876 void
2877 xinit(void) {
2878 XGCValues gcvalues;
2879 Cursor cursor;
2880 Window parent;
2881 int sw, sh;
2882
2883 if(!(xw.dpy = XOpenDisplay(NULL)))
2884 die("Can't open display\n");
2885 xw.scr = XDefaultScreen(xw.dpy);
2886 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2887
2888 /* font */
2889 if(!FcInit())
2890 die("Could not init fontconfig.\n");
2891
2892 usedfont = (opt_font == NULL)? font : opt_font;
2893 xloadfonts(usedfont, 0);
2894
2895 /* colors */
2896 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
2897 xloadcols();
2898
2899 /* adjust fixed window geometry */
2900 if(xw.isfixed) {
2901 sw = DisplayWidth(xw.dpy, xw.scr);
2902 sh = DisplayHeight(xw.dpy, xw.scr);
2903 if(xw.fx < 0)
2904 xw.fx = sw + xw.fx - xw.fw - 1;
2905 if(xw.fy < 0)
2906 xw.fy = sh + xw.fy - xw.fh - 1;
2907
2908 xw.h = xw.fh;
2909 xw.w = xw.fw;
2910 } else {
2911 /* window - default size */
2912 xw.h = 2 * borderpx + term.row * xw.ch;
2913 xw.w = 2 * borderpx + term.col * xw.cw;
2914 xw.fx = 0;
2915 xw.fy = 0;
2916 }
2917
2918 /* Events */
2919 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
2920 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
2921 xw.attrs.bit_gravity = NorthWestGravity;
2922 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
2923 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2924 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2925 xw.attrs.colormap = xw.cmap;
2926
2927 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
2928 XRootWindow(xw.dpy, xw.scr);
2929 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2930 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2931 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
2932 | CWEventMask | CWColormap, &xw.attrs);
2933
2934 memset(&gcvalues, 0, sizeof(gcvalues));
2935 gcvalues.graphics_exposures = False;
2936 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
2937 &gcvalues);
2938 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2939 DefaultDepth(xw.dpy, xw.scr));
2940 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
2941 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
2942
2943 /* Xft rendering context */
2944 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2945
2946 /* input methods */
2947 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2948 XSetLocaleModifiers("@im=local");
2949 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
2950 XSetLocaleModifiers("@im=");
2951 if((xw.xim = XOpenIM(xw.dpy,
2952 NULL, NULL, NULL)) == NULL) {
2953 die("XOpenIM failed. Could not open input"
2954 " device.\n");
2955 }
2956 }
2957 }
2958 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2959 | XIMStatusNothing, XNClientWindow, xw.win,
2960 XNFocusWindow, xw.win, NULL);
2961 if(xw.xic == NULL)
2962 die("XCreateIC failed. Could not obtain input method.\n");
2963
2964 /* white cursor, black outline */
2965 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2966 XDefineCursor(xw.dpy, xw.win, cursor);
2967 XRecolorCursor(xw.dpy, cursor,
2968 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2969 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2970
2971 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2972 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
2973 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
2974
2975 xresettitle();
2976 XMapWindow(xw.dpy, xw.win);
2977 xhints();
2978 XSync(xw.dpy, 0);
2979 }
2980
2981 void
2982 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2983 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
2984 width = charlen * xw.cw, xp, i;
2985 int frcflags;
2986 int u8fl, u8fblen, u8cblen, doesexist;
2987 char *u8c, *u8fs;
2988 long u8char;
2989 Font *font = &dc.font;
2990 FcResult fcres;
2991 FcPattern *fcpattern, *fontpattern;
2992 FcFontSet *fcsets[] = { NULL };
2993 FcCharSet *fccharset;
2994 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
2995 XRenderColor colfg, colbg;
2996 Rectangle r;
2997 int oneatatime;
2998
2999 frcflags = FRC_NORMAL;
3000
3001 if(base.mode & ATTR_ITALIC) {
3002 if(base.fg == defaultfg)
3003 base.fg = defaultitalic;
3004 font = &dc.ifont;
3005 frcflags = FRC_ITALIC;
3006 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3007 if(base.fg == defaultfg)
3008 base.fg = defaultitalic;
3009 font = &dc.ibfont;
3010 frcflags = FRC_ITALICBOLD;
3011 } else if(base.mode & ATTR_UNDERLINE) {
3012 if(base.fg == defaultfg)
3013 base.fg = defaultunderline;
3014 }
3015 if(IS_TRUECOL(base.fg)) {
3016 colfg.red = TRUERED(base.fg);
3017 colfg.green = TRUEGREEN(base.fg);
3018 colfg.blue = TRUEBLUE(base.fg);
3019 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3020 fg = &truefg;
3021 } else {
3022 fg = &dc.col[base.fg];
3023 }
3024
3025 if(IS_TRUECOL(base.bg)) {
3026 colbg.green = TRUEGREEN(base.bg);
3027 colbg.red = TRUERED(base.bg);
3028 colbg.blue = TRUEBLUE(base.bg);
3029 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3030 bg = &truebg;
3031 } else {
3032 bg = &dc.col[base.bg];
3033 }
3034
3035
3036
3037 if(base.mode & ATTR_BOLD) {
3038 if(BETWEEN(base.fg, 0, 7)) {
3039 /* basic system colors */
3040 fg = &dc.col[base.fg + 8];
3041 } else if(BETWEEN(base.fg, 16, 195)) {
3042 /* 256 colors */
3043 fg = &dc.col[base.fg + 36];
3044 } else if(BETWEEN(base.fg, 232, 251)) {
3045 /* greyscale */
3046 fg = &dc.col[base.fg + 4];
3047 }
3048 /*
3049 * Those ranges will not be brightened:
3050 * 8 - 15 – bright system colors
3051 * 196 - 231 – highest 256 color cube
3052 * 252 - 255 – brightest colors in greyscale
3053 */
3054 font = &dc.bfont;
3055 frcflags = FRC_BOLD;
3056 }
3057
3058 if(IS_SET(MODE_REVERSE)) {
3059 if(fg == &dc.col[defaultfg]) {
3060 fg = &dc.col[defaultbg];
3061 } else {
3062 colfg.red = ~fg->color.red;
3063 colfg.green = ~fg->color.green;
3064 colfg.blue = ~fg->color.blue;
3065 colfg.alpha = fg->color.alpha;
3066 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
3067 fg = &revfg;
3068 }
3069
3070 if(bg == &dc.col[defaultbg]) {
3071 bg = &dc.col[defaultfg];
3072 } else {
3073 colbg.red = ~bg->color.red;
3074 colbg.green = ~bg->color.green;
3075 colbg.blue = ~bg->color.blue;
3076 colbg.alpha = bg->color.alpha;
3077 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
3078 bg = &revbg;
3079 }
3080 }
3081
3082 if(base.mode & ATTR_REVERSE) {
3083 temp = fg;
3084 fg = bg;
3085 bg = temp;
3086 }
3087
3088 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3089 fg = bg;
3090
3091 /* Intelligent cleaning up of the borders. */
3092 if(x == 0) {
3093 xclear(0, (y == 0)? 0 : winy, borderpx,
3094 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3095 }
3096 if(x + charlen >= term.col) {
3097 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3098 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3099 }
3100 if(y == 0)
3101 xclear(winx, 0, winx + width, borderpx);
3102 if(y == term.row-1)
3103 xclear(winx, winy + xw.ch, winx + width, xw.h);
3104
3105 /* Clean up the region we want to draw to. */
3106 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3107
3108 /* Set the clip region because Xft is sometimes dirty. */
3109 r.x = 0;
3110 r.y = 0;
3111 r.height = xw.ch;
3112 r.width = width;
3113 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3114
3115 for(xp = winx; bytelen > 0;) {
3116 /*
3117 * Search for the range in the to be printed string of glyphs
3118 * that are in the main font. Then print that range. If
3119 * some glyph is found that is not in the font, do the
3120 * fallback dance.
3121 */
3122 u8fs = s;
3123 u8fblen = 0;
3124 u8fl = 0;
3125 oneatatime = font->width != xw.cw;
3126 for(;;) {
3127 u8c = s;
3128 u8cblen = utf8decode(s, &u8char);
3129 s += u8cblen;
3130 bytelen -= u8cblen;
3131
3132 doesexist = XftCharExists(xw.dpy, font->match, u8char);
3133 if(oneatatime || !doesexist || bytelen <= 0) {
3134 if(oneatatime || bytelen <= 0) {
3135 if(doesexist) {
3136 u8fl++;
3137 u8fblen += u8cblen;
3138 }
3139 }
3140
3141 if(u8fl > 0) {
3142 XftDrawStringUtf8(xw.draw, fg,
3143 font->match, xp,
3144 winy + font->ascent,
3145 (FcChar8 *)u8fs,
3146 u8fblen);
3147 xp += xw.cw * u8fl;
3148
3149 }
3150 break;
3151 }
3152
3153 u8fl++;
3154 u8fblen += u8cblen;
3155 }
3156 if(doesexist) {
3157 if (oneatatime)
3158 continue;
3159 break;
3160 }
3161
3162 /* Search the font cache. */
3163 for(i = 0; i < frclen; i++) {
3164 if(XftCharExists(xw.dpy, frc[i].font, u8char)
3165 && frc[i].flags == frcflags) {
3166 break;
3167 }
3168 }
3169
3170 /* Nothing was found. */
3171 if(i >= frclen) {
3172 if(!font->set)
3173 xloadfontset(font);
3174 fcsets[0] = font->set;
3175
3176 /*
3177 * Nothing was found in the cache. Now use
3178 * some dozen of Fontconfig calls to get the
3179 * font for one single character.
3180 */
3181 fcpattern = FcPatternDuplicate(font->pattern);
3182 fccharset = FcCharSetCreate();
3183
3184 FcCharSetAddChar(fccharset, u8char);
3185 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3186 fccharset);
3187 FcPatternAddBool(fcpattern, FC_SCALABLE,
3188 FcTrue);
3189
3190 FcConfigSubstitute(0, fcpattern,
3191 FcMatchPattern);
3192 FcDefaultSubstitute(fcpattern);
3193
3194 fontpattern = FcFontSetMatch(0, fcsets,
3195 FcTrue, fcpattern, &fcres);
3196
3197 /*
3198 * Overwrite or create the new cache entry.
3199 */
3200 if(frclen >= LEN(frc)) {
3201 frclen = LEN(frc) - 1;
3202 XftFontClose(xw.dpy, frc[frclen].font);
3203 }
3204
3205 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3206 fontpattern);
3207 frc[frclen].flags = frcflags;
3208
3209 i = frclen;
3210 frclen++;
3211
3212 FcPatternDestroy(fcpattern);
3213 FcCharSetDestroy(fccharset);
3214 }
3215
3216 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3217 xp, winy + frc[i].font->ascent,
3218 (FcChar8 *)u8c, u8cblen);
3219
3220 xp += xw.cw * wcwidth(u8char);
3221 }
3222
3223 /*
3224 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3225 winy + font->ascent, (FcChar8 *)s, bytelen);
3226 */
3227
3228 if(base.mode & ATTR_UNDERLINE) {
3229 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3230 width, 1);
3231 }
3232
3233 /* Reset clip to none. */
3234 XftDrawSetClip(xw.draw, 0);
3235 }
3236
3237 void
3238 xdrawcursor(void) {
3239 static int oldx = 0, oldy = 0;
3240 int sl, width, curx;
3241 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3242
3243 LIMIT(oldx, 0, term.col-1);
3244 LIMIT(oldy, 0, term.row-1);
3245
3246 curx = term.c.x;
3247
3248 /* adjust position if in dummy */
3249 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3250 oldx--;
3251 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3252 curx--;
3253
3254 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3255
3256 /* remove the old cursor */
3257 sl = utf8size(term.line[oldy][oldx].c);
3258 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3259 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3260 oldy, width, sl);
3261
3262 /* draw the new one */
3263 if(!(IS_SET(MODE_HIDE))) {
3264 if(xw.state & WIN_FOCUSED) {
3265 if(IS_SET(MODE_REVERSE)) {
3266 g.mode |= ATTR_REVERSE;
3267 g.fg = defaultcs;
3268 g.bg = defaultfg;
3269 }
3270
3271 sl = utf8size(g.c);
3272 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3273 ? 2 : 1;
3274 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3275 } else {
3276 XftDrawRect(xw.draw, &dc.col[defaultcs],
3277 borderpx + curx * xw.cw,
3278 borderpx + term.c.y * xw.ch,
3279 xw.cw - 1, 1);
3280 XftDrawRect(xw.draw, &dc.col[defaultcs],
3281 borderpx + curx * xw.cw,
3282 borderpx + term.c.y * xw.ch,
3283 1, xw.ch - 1);
3284 XftDrawRect(xw.draw, &dc.col[defaultcs],
3285 borderpx + (curx + 1) * xw.cw - 1,
3286 borderpx + term.c.y * xw.ch,
3287 1, xw.ch - 1);
3288 XftDrawRect(xw.draw, &dc.col[defaultcs],
3289 borderpx + curx * xw.cw,
3290 borderpx + (term.c.y + 1) * xw.ch - 1,
3291 xw.cw, 1);
3292 }
3293 oldx = curx, oldy = term.c.y;
3294 }
3295 }
3296
3297
3298 void
3299 xsettitle(char *p) {
3300 XTextProperty prop;
3301
3302 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3303 &prop);
3304 XSetWMName(xw.dpy, xw.win, &prop);
3305 XFree(prop.value);
3306 }
3307
3308 void
3309 xresettitle(void) {
3310 xsettitle(opt_title ? opt_title : "st");
3311 }
3312
3313 void
3314 redraw(int timeout) {
3315 struct timespec tv = {0, timeout * 1000};
3316
3317 tfulldirt();
3318 draw();
3319
3320 if(timeout > 0) {
3321 nanosleep(&tv, NULL);
3322 XSync(xw.dpy, False); /* necessary for a good tput flash */
3323 }
3324 }
3325
3326 void
3327 draw(void) {
3328 drawregion(0, 0, term.col, term.row);
3329 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3330 xw.h, 0, 0);
3331 XSetForeground(xw.dpy, dc.gc,
3332 dc.col[IS_SET(MODE_REVERSE)?
3333 defaultfg : defaultbg].pixel);
3334 }
3335
3336 void
3337 drawregion(int x1, int y1, int x2, int y2) {
3338 int ic, ib, x, y, ox, sl;
3339 Glyph base, new;
3340 char buf[DRAW_BUF_SIZ];
3341 bool ena_sel = sel.ob.x != -1;
3342 long u8char;
3343
3344 if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
3345 ena_sel = 0;
3346
3347 if(!(xw.state & WIN_VISIBLE))
3348 return;
3349
3350 for(y = y1; y < y2; y++) {
3351 if(!term.dirty[y])
3352 continue;
3353
3354 xtermclear(0, y, term.col, y);
3355 term.dirty[y] = 0;
3356 base = term.line[y][0];
3357 ic = ib = ox = 0;
3358 for(x = x1; x < x2; x++) {
3359 new = term.line[y][x];
3360 if(new.mode == ATTR_WDUMMY)
3361 continue;
3362 if(ena_sel && selected(x, y))
3363 new.mode ^= ATTR_REVERSE;
3364 if(ib > 0 && (ATTRCMP(base, new)
3365 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3366 xdraws(buf, base, ox, y, ic, ib);
3367 ic = ib = 0;
3368 }
3369 if(ib == 0) {
3370 ox = x;
3371 base = new;
3372 }
3373
3374 sl = utf8decode(new.c, &u8char);
3375 memcpy(buf+ib, new.c, sl);
3376 ib += sl;
3377 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3378 }
3379 if(ib > 0)
3380 xdraws(buf, base, ox, y, ic, ib);
3381 }
3382 xdrawcursor();
3383 }
3384
3385 void
3386 expose(XEvent *ev) {
3387 XExposeEvent *e = &ev->xexpose;
3388
3389 if(xw.state & WIN_REDRAW) {
3390 if(!e->count)
3391 xw.state &= ~WIN_REDRAW;
3392 }
3393 redraw(0);
3394 }
3395
3396 void
3397 visibility(XEvent *ev) {
3398 XVisibilityEvent *e = &ev->xvisibility;
3399
3400 if(e->state == VisibilityFullyObscured) {
3401 xw.state &= ~WIN_VISIBLE;
3402 } else if(!(xw.state & WIN_VISIBLE)) {
3403 /* need a full redraw for next Expose, not just a buf copy */
3404 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3405 }
3406 }
3407
3408 void
3409 unmap(XEvent *ev) {
3410 xw.state &= ~WIN_VISIBLE;
3411 }
3412
3413 void
3414 xsetpointermotion(int set) {
3415 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3416 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3417 }
3418
3419 void
3420 xseturgency(int add) {
3421 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3422
3423 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3424 XSetWMHints(xw.dpy, xw.win, h);
3425 XFree(h);
3426 }
3427
3428 void
3429 focus(XEvent *ev) {
3430 XFocusChangeEvent *e = &ev->xfocus;
3431
3432 if(e->mode == NotifyGrab)
3433 return;
3434
3435 if(ev->type == FocusIn) {
3436 XSetICFocus(xw.xic);
3437 xw.state |= WIN_FOCUSED;
3438 xseturgency(0);
3439 if(IS_SET(MODE_FOCUS))
3440 ttywrite("\033[I", 3);
3441 } else {
3442 XUnsetICFocus(xw.xic);
3443 xw.state &= ~WIN_FOCUSED;
3444 if(IS_SET(MODE_FOCUS))
3445 ttywrite("\033[O", 3);
3446 }
3447 }
3448
3449 static inline bool
3450 match(uint mask, uint state) {
3451 state &= ~ignoremod;
3452
3453 if(mask == XK_NO_MOD && state)
3454 return false;
3455 if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
3456 return false;
3457 if(mask == XK_ANY_MOD)
3458 return true;
3459 return state == mask;
3460 }
3461
3462 void
3463 numlock(const Arg *dummy) {
3464 term.numlock ^= 1;
3465 }
3466
3467 char*
3468 kmap(KeySym k, uint state) {
3469 Key *kp;
3470 int i;
3471
3472 /* Check for mapped keys out of X11 function keys. */
3473 for(i = 0; i < LEN(mappedkeys); i++) {
3474 if(mappedkeys[i] == k)
3475 break;
3476 }
3477 if(i == LEN(mappedkeys)) {
3478 if((k & 0xFFFF) < 0xFD00)
3479 return NULL;
3480 }
3481
3482 for(kp = key; kp < key + LEN(key); kp++) {
3483 if(kp->k != k)
3484 continue;
3485
3486 if(!match(kp->mask, state))
3487 continue;
3488
3489 if(kp->appkey > 0) {
3490 if(!IS_SET(MODE_APPKEYPAD))
3491 continue;
3492 if(term.numlock && kp->appkey == 2)
3493 continue;
3494 } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
3495 continue;
3496 }
3497
3498 if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
3499 (kp->appcursor > 0
3500 && !IS_SET(MODE_APPCURSOR))) {
3501 continue;
3502 }
3503
3504 if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
3505 (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
3506 continue;
3507 }
3508
3509 return kp->s;
3510 }
3511
3512 return NULL;
3513 }
3514
3515 void
3516 kpress(XEvent *ev) {
3517 XKeyEvent *e = &ev->xkey;
3518 KeySym ksym;
3519 char xstr[31], buf[32], *customkey, *cp = buf;
3520 int len, ret;
3521 long c;
3522 Status status;
3523 Shortcut *bp;
3524
3525 if(IS_SET(MODE_KBDLOCK))
3526 return;
3527
3528 len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
3529 e->state &= ~Mod2Mask;
3530 /* 1. shortcuts */
3531 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3532 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3533 bp->func(&(bp->arg));
3534 return;
3535 }
3536 }
3537
3538 /* 2. custom keys from config.h */
3539 if((customkey = kmap(ksym, e->state))) {
3540 len = strlen(customkey);
3541 memcpy(buf, customkey, len);
3542 /* 3. hardcoded (overrides X lookup) */
3543 } else {
3544 if(len == 0)
3545 return;
3546
3547 if(len == 1 && e->state & Mod1Mask) {
3548 if(IS_SET(MODE_8BIT)) {
3549 if(*xstr < 0177) {
3550 c = *xstr | 0x80;
3551 ret = utf8encode(&c, cp);
3552 cp += ret;
3553 len = 0;
3554 }
3555 } else {
3556 *cp++ = '\033';
3557 }
3558 }
3559
3560 memcpy(cp, xstr, len);
3561 len = cp - buf + len;
3562 }
3563
3564 ttywrite(buf, len);
3565 if(IS_SET(MODE_ECHO))
3566 techo(buf, len);
3567 }
3568
3569
3570 void
3571 cmessage(XEvent *e) {
3572 /*
3573 * See xembed specs
3574 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3575 */
3576 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3577 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3578 xw.state |= WIN_FOCUSED;
3579 xseturgency(0);
3580 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3581 xw.state &= ~WIN_FOCUSED;
3582 }
3583 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3584 /* Send SIGHUP to shell */
3585 kill(pid, SIGHUP);
3586 exit(EXIT_SUCCESS);
3587 }
3588 }
3589
3590 void
3591 cresize(int width, int height) {
3592 int col, row;
3593
3594 if(width != 0)
3595 xw.w = width;
3596 if(height != 0)
3597 xw.h = height;
3598
3599 col = (xw.w - 2 * borderpx) / xw.cw;
3600 row = (xw.h - 2 * borderpx) / xw.ch;
3601
3602 tresize(col, row);
3603 xresize(col, row);
3604 ttyresize();
3605 }
3606
3607 void
3608 resize(XEvent *e) {
3609 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3610 return;
3611
3612 cresize(e->xconfigure.width, e->xconfigure.height);
3613 }
3614
3615 void
3616 run(void) {
3617 XEvent ev;
3618 int w = xw.w, h = xw.h;
3619 fd_set rfd;
3620 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3621 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3622
3623 /* Waiting for window mapping */
3624 while(1) {
3625 XNextEvent(xw.dpy, &ev);
3626 if(ev.type == ConfigureNotify) {
3627 w = ev.xconfigure.width;
3628 h = ev.xconfigure.height;
3629 } else if(ev.type == MapNotify) {
3630 break;
3631 }
3632 }
3633
3634 if(!xw.isfixed)
3635 cresize(w, h);
3636 else
3637 cresize(xw.fw, xw.fh);
3638 ttynew();
3639
3640 gettimeofday(&lastblink, NULL);
3641 gettimeofday(&last, NULL);
3642
3643 for(xev = actionfps;;) {
3644 FD_ZERO(&rfd);
3645 FD_SET(cmdfd, &rfd);
3646 FD_SET(xfd, &rfd);
3647
3648 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3649 if(errno == EINTR)
3650 continue;
3651 die("select failed: %s\n", SERRNO);
3652 }
3653 if(FD_ISSET(cmdfd, &rfd)) {
3654 ttyread();
3655 if(blinktimeout) {
3656 blinkset = tattrset(ATTR_BLINK);
3657 if(!blinkset)
3658 MODBIT(term.mode, 0, MODE_BLINK);
3659 }
3660 }
3661
3662 if(FD_ISSET(xfd, &rfd))
3663 xev = actionfps;
3664
3665 gettimeofday(&now, NULL);
3666 drawtimeout.tv_sec = 0;
3667 drawtimeout.tv_usec = (1000/xfps) * 1000;
3668 tv = &drawtimeout;
3669
3670 dodraw = 0;
3671 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3672 tsetdirtattr(ATTR_BLINK);
3673 term.mode ^= MODE_BLINK;
3674 gettimeofday(&lastblink, NULL);
3675 dodraw = 1;
3676 }
3677 if(TIMEDIFF(now, last) \
3678 > (xev? (1000/xfps) : (1000/actionfps))) {
3679 dodraw = 1;
3680 last = now;
3681 }
3682
3683 if(dodraw) {
3684 while(XPending(xw.dpy)) {
3685 XNextEvent(xw.dpy, &ev);
3686 if(XFilterEvent(&ev, None))
3687 continue;
3688 if(handler[ev.type])
3689 (handler[ev.type])(&ev);
3690 }
3691
3692 draw();
3693 XFlush(xw.dpy);
3694
3695 if(xev && !FD_ISSET(xfd, &rfd))
3696 xev--;
3697 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3698 if(blinkset) {
3699 if(TIMEDIFF(now, lastblink) \
3700 > blinktimeout) {
3701 drawtimeout.tv_usec = 1;
3702 } else {
3703 drawtimeout.tv_usec = (1000 * \
3704 (blinktimeout - \
3705 TIMEDIFF(now,
3706 lastblink)));
3707 }
3708 } else {
3709 tv = NULL;
3710 }
3711 }
3712 }
3713 }
3714 }
3715
3716 void
3717 usage(void) {
3718 die("%s " VERSION " (c) 2010-2013 st engineers\n" \
3719 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3720 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3721 }
3722
3723 int
3724 main(int argc, char *argv[]) {
3725 int bitm, xr, yr;
3726 uint wr, hr;
3727 char *titles;
3728
3729 xw.fw = xw.fh = xw.fx = xw.fy = 0;
3730 xw.isfixed = False;
3731
3732 ARGBEGIN {
3733 case 'a':
3734 allowaltscreen = false;
3735 break;
3736 case 'c':
3737 opt_class = EARGF(usage());
3738 break;
3739 case 'e':
3740 /* eat all remaining arguments */
3741 if(argc > 1) {
3742 opt_cmd = &argv[1];
3743 if(argv[1] != NULL && opt_title == NULL) {
3744 titles = strdup(argv[1]);
3745 opt_title = basename(titles);
3746 }
3747 }
3748 goto run;
3749 case 'f':
3750 opt_font = EARGF(usage());
3751 break;
3752 case 'g':
3753 bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
3754 if(bitm & XValue)
3755 xw.fx = xr;
3756 if(bitm & YValue)
3757 xw.fy = yr;
3758 if(bitm & WidthValue)
3759 xw.fw = (int)wr;
3760 if(bitm & HeightValue)
3761 xw.fh = (int)hr;
3762 if(bitm & XNegative && xw.fx == 0)
3763 xw.fx = -1;
3764 if(bitm & YNegative && xw.fy == 0)
3765 xw.fy = -1;
3766
3767 if(xw.fh != 0 && xw.fw != 0)
3768 xw.isfixed = True;
3769 break;
3770 case 'o':
3771 opt_io = EARGF(usage());
3772 break;
3773 case 't':
3774 opt_title = EARGF(usage());
3775 break;
3776 case 'w':
3777 opt_embed = EARGF(usage());
3778 break;
3779 case 'v':
3780 default:
3781 usage();
3782 } ARGEND;
3783
3784 run:
3785 setlocale(LC_CTYPE, "");
3786 XSetLocaleModifiers("");
3787 tnew(80, 24);
3788 xinit();
3789 selinit();
3790 run();
3791
3792 return 0;
3793 }
3794