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20e45128eed3d4ab943fc3892bcda3b96475c29d
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #define _XOPEN_SOURCE 600
3 #include <ctype.h>
4 #include <errno.h>
5 #include <fcntl.h>
6 #include <limits.h>
7 #include <locale.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 <X11/Xatom.h>
23 #include <X11/Xlib.h>
24 #include <X11/Xutil.h>
25 #include <X11/cursorfont.h>
26 #include <X11/keysym.h>
27 #include <X11/extensions/Xdbe.h>
28
29 #if defined(__linux)
30 #include <pty.h>
31 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
32 #include <util.h>
33 #elif defined(__FreeBSD__) || defined(__DragonFly__)
34 #include <libutil.h>
35 #endif
36
37 #define USAGE \
38 "st " VERSION " (c) 2010-2012 st engineers\n" \
39 "usage: st [-t title] [-c class] [-g geometry]" \
40 " [-w windowid] [-v] [-f file] [-e command...]\n"
41
42 /* XEMBED messages */
43 #define XEMBED_FOCUS_IN 4
44 #define XEMBED_FOCUS_OUT 5
45
46 /* Arbitrary sizes */
47 #define ESC_BUF_SIZ 256
48 #define ESC_ARG_SIZ 16
49 #define STR_BUF_SIZ 256
50 #define STR_ARG_SIZ 16
51 #define DRAW_BUF_SIZ 20*1024
52 #define UTF_SIZ 4
53 #define XK_NO_MOD UINT_MAX
54 #define XK_ANY_MOD 0
55
56 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
57
58 #define SERRNO strerror(errno)
59 #define MIN(a, b) ((a) < (b) ? (a) : (b))
60 #define MAX(a, b) ((a) < (b) ? (b) : (a))
61 #define LEN(a) (sizeof(a) / sizeof(a[0]))
62 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
63 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
64 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
65 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
66 #define IS_SET(flag) (term.mode & (flag))
67 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
68 #define X2COL(x) (((x) - BORDER)/xw.cw)
69 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
70
71 enum glyph_attribute {
72 ATTR_NULL = 0,
73 ATTR_REVERSE = 1,
74 ATTR_UNDERLINE = 2,
75 ATTR_BOLD = 4,
76 ATTR_GFX = 8,
77 ATTR_ITALIC = 16,
78 ATTR_BLINK = 32,
79 };
80
81 enum cursor_movement {
82 CURSOR_UP,
83 CURSOR_DOWN,
84 CURSOR_LEFT,
85 CURSOR_RIGHT,
86 CURSOR_SAVE,
87 CURSOR_LOAD
88 };
89
90 enum cursor_state {
91 CURSOR_DEFAULT = 0,
92 CURSOR_HIDE = 1,
93 CURSOR_WRAPNEXT = 2
94 };
95
96 enum glyph_state {
97 GLYPH_SET = 1,
98 GLYPH_DIRTY = 2
99 };
100
101 enum term_mode {
102 MODE_WRAP = 1,
103 MODE_INSERT = 2,
104 MODE_APPKEYPAD = 4,
105 MODE_ALTSCREEN = 8,
106 MODE_CRLF = 16,
107 MODE_MOUSEBTN = 32,
108 MODE_MOUSEMOTION = 64,
109 MODE_MOUSE = 32|64,
110 MODE_REVERSE = 128
111 };
112
113 enum escape_state {
114 ESC_START = 1,
115 ESC_CSI = 2,
116 ESC_STR = 4, /* DSC, OSC, PM, APC */
117 ESC_ALTCHARSET = 8,
118 ESC_STR_END = 16, /* a final string was encountered */
119 };
120
121 enum window_state {
122 WIN_VISIBLE = 1,
123 WIN_REDRAW = 2,
124 WIN_FOCUSED = 4
125 };
126
127 /* bit macro */
128 #undef B0
129 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
130
131 typedef unsigned char uchar;
132 typedef unsigned int uint;
133 typedef unsigned long ulong;
134 typedef unsigned short ushort;
135
136 typedef struct {
137 char c[UTF_SIZ]; /* character code */
138 uchar mode; /* attribute flags */
139 ushort fg; /* foreground */
140 ushort bg; /* background */
141 uchar state; /* state flags */
142 } Glyph;
143
144 typedef Glyph* Line;
145
146 typedef struct {
147 Glyph attr; /* current char attributes */
148 int x;
149 int y;
150 char state;
151 } TCursor;
152
153 /* CSI Escape sequence structs */
154 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
155 typedef struct {
156 char buf[ESC_BUF_SIZ]; /* raw string */
157 int len; /* raw string length */
158 char priv;
159 int arg[ESC_ARG_SIZ];
160 int narg; /* nb of args */
161 char mode;
162 } CSIEscape;
163
164 /* STR Escape sequence structs */
165 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
166 typedef struct {
167 char type; /* ESC type ... */
168 char buf[STR_BUF_SIZ]; /* raw string */
169 int len; /* raw string length */
170 char *args[STR_ARG_SIZ];
171 int narg; /* nb of args */
172 } STREscape;
173
174 /* Internal representation of the screen */
175 typedef struct {
176 int row; /* nb row */
177 int col; /* nb col */
178 Line* line; /* screen */
179 Line* alt; /* alternate screen */
180 bool* dirty; /* dirtyness of lines */
181 TCursor c; /* cursor */
182 int top; /* top scroll limit */
183 int bot; /* bottom scroll limit */
184 int mode; /* terminal mode flags */
185 int esc; /* escape state flags */
186 bool *tabs;
187 } Term;
188
189 /* Purely graphic info */
190 typedef struct {
191 Display* dpy;
192 Colormap cmap;
193 Window win;
194 XdbeBackBuffer buf;
195 Atom xembed;
196 XIM xim;
197 XIC xic;
198 int scr;
199 Bool isfixed; /* is fixed geometry? */
200 int fx, fy, fw, fh; /* fixed geometry */
201 int w; /* window width */
202 int h; /* window height */
203 int ch; /* char height */
204 int cw; /* char width */
205 char state; /* focus, redraw, visible */
206 } XWindow;
207
208 typedef struct {
209 KeySym k;
210 uint mask;
211 char s[ESC_BUF_SIZ];
212 } Key;
213
214
215 /* TODO: use better name for vars... */
216 typedef struct {
217 int mode;
218 int bx, by;
219 int ex, ey;
220 struct {int x, y;} b, e;
221 char *clip;
222 Atom xtarget;
223 bool alt;
224 struct timeval tclick1;
225 struct timeval tclick2;
226 } Selection;
227
228 #include "config.h"
229
230 /* Drawing Context */
231 typedef struct {
232 ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
233 GC gc;
234 struct {
235 int ascent;
236 int descent;
237 short lbearing;
238 short rbearing;
239 XFontSet set;
240 } font, bfont, ifont, ibfont;
241 } DC;
242
243 static void die(const char*, ...);
244 static void draw(void);
245 static void redraw(void);
246 static void drawregion(int, int, int, int);
247 static void execsh(void);
248 static void sigchld(int);
249 static void run(void);
250
251 static void csidump(void);
252 static void csihandle(void);
253 static void csiparse(void);
254 static void csireset(void);
255 static void strdump(void);
256 static void strhandle(void);
257 static void strparse(void);
258 static void strreset(void);
259
260 static void tclearregion(int, int, int, int);
261 static void tcursor(int);
262 static void tdeletechar(int);
263 static void tdeleteline(int);
264 static void tinsertblank(int);
265 static void tinsertblankline(int);
266 static void tmoveto(int, int);
267 static void tnew(int, int);
268 static void tnewline(int);
269 static void tputtab(bool);
270 static void tputc(char*);
271 static void treset(void);
272 static int tresize(int, int);
273 static void tscrollup(int, int);
274 static void tscrolldown(int, int);
275 static void tsetattr(int*, int);
276 static void tsetchar(char*);
277 static void tsetscroll(int, int);
278 static void tswapscreen(void);
279 static void tsetdirt(int, int);
280 static void tsetmode(bool, bool, int *, int);
281 static void tfulldirt(void);
282
283 static void ttynew(void);
284 static void ttyread(void);
285 static void ttyresize(int, int);
286 static void ttywrite(const char *, size_t);
287
288 static void xdraws(char *, Glyph, int, int, int, int);
289 static void xhints(void);
290 static void xclear(int, int, int, int);
291 static void xdrawcursor(void);
292 static void xinit(void);
293 static void xloadcols(void);
294 static void xresettitle(void);
295 static void xseturgency(int);
296 static void xsetsel(char*);
297 static void xresize(int, int);
298
299 static void expose(XEvent *);
300 static void visibility(XEvent *);
301 static void unmap(XEvent *);
302 static char* kmap(KeySym, uint);
303 static void kpress(XEvent *);
304 static void cmessage(XEvent *);
305 static void resize(XEvent *);
306 static void focus(XEvent *);
307 static void brelease(XEvent *);
308 static void bpress(XEvent *);
309 static void bmotion(XEvent *);
310 static void selnotify(XEvent *);
311 static void selclear(XEvent *);
312 static void selrequest(XEvent *);
313
314 static void selinit(void);
315 static inline bool selected(int, int);
316 static void selcopy(void);
317 static void selpaste(void);
318 static void selscroll(int, int);
319
320 static int utf8decode(char *, long *);
321 static int utf8encode(long *, char *);
322 static int utf8size(char *);
323 static int isfullutf8(char *, int);
324
325 static void *xmalloc(size_t);
326 static void *xrealloc(void *, size_t);
327 static void *xcalloc(size_t nmemb, size_t size);
328
329 static void (*handler[LASTEvent])(XEvent *) = {
330 [KeyPress] = kpress,
331 [ClientMessage] = cmessage,
332 [ConfigureNotify] = resize,
333 [VisibilityNotify] = visibility,
334 [UnmapNotify] = unmap,
335 [Expose] = expose,
336 [FocusIn] = focus,
337 [FocusOut] = focus,
338 [MotionNotify] = bmotion,
339 [ButtonPress] = bpress,
340 [ButtonRelease] = brelease,
341 [SelectionClear] = selclear,
342 [SelectionNotify] = selnotify,
343 [SelectionRequest] = selrequest,
344 };
345
346 /* Globals */
347 static DC dc;
348 static XWindow xw;
349 static Term term;
350 static CSIEscape csiescseq;
351 static STREscape strescseq;
352 static int cmdfd;
353 static pid_t pid;
354 static Selection sel;
355 static int iofd = -1;
356 static char **opt_cmd = NULL;
357 static char *opt_io = NULL;
358 static char *opt_title = NULL;
359 static char *opt_embed = NULL;
360 static char *opt_class = NULL;
361
362 void *
363 xmalloc(size_t len) {
364 void *p = malloc(len);
365 if(!p)
366 die("Out of memory\n");
367 return p;
368 }
369
370 void *
371 xrealloc(void *p, size_t len) {
372 if((p = realloc(p, len)) == NULL)
373 die("Out of memory\n");
374 return p;
375 }
376
377 void *
378 xcalloc(size_t nmemb, size_t size) {
379 void *p = calloc(nmemb, size);
380 if(!p)
381 die("Out of memory\n");
382 return p;
383 }
384
385 int
386 utf8decode(char *s, long *u) {
387 uchar c;
388 int i, n, rtn;
389
390 rtn = 1;
391 c = *s;
392 if(~c & B7) { /* 0xxxxxxx */
393 *u = c;
394 return rtn;
395 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
396 *u = c&(B4|B3|B2|B1|B0);
397 n = 1;
398 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
399 *u = c&(B3|B2|B1|B0);
400 n = 2;
401 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
402 *u = c & (B2|B1|B0);
403 n = 3;
404 } else
405 goto invalid;
406 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
407 c = *s;
408 if((c & (B7|B6)) != B7) /* 10xxxxxx */
409 goto invalid;
410 *u <<= 6;
411 *u |= c & (B5|B4|B3|B2|B1|B0);
412 }
413 if((n == 1 && *u < 0x80) ||
414 (n == 2 && *u < 0x800) ||
415 (n == 3 && *u < 0x10000) ||
416 (*u >= 0xD800 && *u <= 0xDFFF))
417 goto invalid;
418 return rtn;
419 invalid:
420 *u = 0xFFFD;
421 return rtn;
422 }
423
424 int
425 utf8encode(long *u, char *s) {
426 uchar *sp;
427 ulong uc;
428 int i, n;
429
430 sp = (uchar*) s;
431 uc = *u;
432 if(uc < 0x80) {
433 *sp = uc; /* 0xxxxxxx */
434 return 1;
435 } else if(*u < 0x800) {
436 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
437 n = 1;
438 } else if(uc < 0x10000) {
439 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
440 n = 2;
441 } else if(uc <= 0x10FFFF) {
442 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
443 n = 3;
444 } else {
445 goto invalid;
446 }
447 for(i=n,++sp; i>0; --i,++sp)
448 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
449 return n+1;
450 invalid:
451 /* U+FFFD */
452 *s++ = '\xEF';
453 *s++ = '\xBF';
454 *s = '\xBD';
455 return 3;
456 }
457
458 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
459 UTF-8 otherwise return 0 */
460 int
461 isfullutf8(char *s, int b) {
462 uchar *c1, *c2, *c3;
463
464 c1 = (uchar *) s;
465 c2 = (uchar *) ++s;
466 c3 = (uchar *) ++s;
467 if(b < 1)
468 return 0;
469 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
470 return 0;
471 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
472 ((b == 1) ||
473 ((b == 2) && (*c2&(B7|B6)) == B7)))
474 return 0;
475 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
476 ((b == 1) ||
477 ((b == 2) && (*c2&(B7|B6)) == B7) ||
478 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
479 return 0;
480 else
481 return 1;
482 }
483
484 int
485 utf8size(char *s) {
486 uchar c = *s;
487
488 if(~c&B7)
489 return 1;
490 else if((c&(B7|B6|B5)) == (B7|B6))
491 return 2;
492 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
493 return 3;
494 else
495 return 4;
496 }
497
498 void
499 selinit(void) {
500 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
501 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
502 sel.mode = 0;
503 sel.bx = -1;
504 sel.clip = NULL;
505 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
506 if(sel.xtarget == None)
507 sel.xtarget = XA_STRING;
508 }
509
510 static inline bool
511 selected(int x, int y) {
512 if(sel.ey == y && sel.by == y) {
513 int bx = MIN(sel.bx, sel.ex);
514 int ex = MAX(sel.bx, sel.ex);
515 return BETWEEN(x, bx, ex);
516 }
517 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
518 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
519 }
520
521 void
522 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
523 if(b)
524 *b = e->xbutton.button;
525
526 *x = X2COL(e->xbutton.x);
527 *y = Y2ROW(e->xbutton.y);
528 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
529 sel.b.y = MIN(sel.by, sel.ey);
530 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
531 sel.e.y = MAX(sel.by, sel.ey);
532 }
533
534 void
535 mousereport(XEvent *e) {
536 int x = X2COL(e->xbutton.x);
537 int y = Y2ROW(e->xbutton.y);
538 int button = e->xbutton.button;
539 int state = e->xbutton.state;
540 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
541 static int ob, ox, oy;
542
543 /* from urxvt */
544 if(e->xbutton.type == MotionNotify) {
545 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
546 return;
547 button = ob + 32;
548 ox = x, oy = y;
549 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
550 button = 3;
551 } else {
552 button -= Button1;
553 if(button >= 3)
554 button += 64 - 3;
555 if(e->xbutton.type == ButtonPress) {
556 ob = button;
557 ox = x, oy = y;
558 }
559 }
560
561 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
562 + (state & Mod4Mask ? 8 : 0)
563 + (state & ControlMask ? 16 : 0);
564
565 ttywrite(buf, sizeof(buf));
566 }
567
568 void
569 bpress(XEvent *e) {
570 if(IS_SET(MODE_MOUSE))
571 mousereport(e);
572 else if(e->xbutton.button == Button1) {
573 if(sel.bx != -1) {
574 sel.bx = -1;
575 tsetdirt(sel.b.y, sel.e.y);
576 draw();
577 }
578 sel.mode = 1;
579 sel.ex = sel.bx = X2COL(e->xbutton.x);
580 sel.ey = sel.by = Y2ROW(e->xbutton.y);
581 }
582 }
583
584 void
585 selcopy(void) {
586 char *str, *ptr;
587 int x, y, bufsize, is_selected = 0;
588
589 if(sel.bx == -1)
590 str = NULL;
591
592 else {
593 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
594 ptr = str = xmalloc(bufsize);
595
596 /* append every set & selected glyph to the selection */
597 for(y = 0; y < term.row; y++) {
598 for(x = 0; x < term.col; x++) {
599 int size;
600 char *p;
601 Glyph *gp = &term.line[y][x];
602
603 if(!(is_selected = selected(x, y)))
604 continue;
605 p = (gp->state & GLYPH_SET) ? gp->c : " ";
606 size = utf8size(p);
607 memcpy(ptr, p, size);
608 ptr += size;
609 }
610 /* \n at the end of every selected line except for the last one */
611 if(is_selected && y < sel.e.y)
612 *ptr++ = '\n';
613 }
614 *ptr = 0;
615 }
616 sel.alt = IS_SET(MODE_ALTSCREEN);
617 xsetsel(str);
618 }
619
620 void
621 selnotify(XEvent *e) {
622 ulong nitems, ofs, rem;
623 int format;
624 uchar *data;
625 Atom type;
626
627 ofs = 0;
628 do {
629 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
630 False, AnyPropertyType, &type, &format,
631 &nitems, &rem, &data)) {
632 fprintf(stderr, "Clipboard allocation failed\n");
633 return;
634 }
635 ttywrite((const char *) data, nitems * format / 8);
636 XFree(data);
637 /* number of 32-bit chunks returned */
638 ofs += nitems * format / 32;
639 } while(rem > 0);
640 }
641
642 void
643 selpaste() {
644 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
645 }
646
647 void selclear(XEvent *e) {
648 if(sel.bx == -1)
649 return;
650 sel.bx = -1;
651 tsetdirt(sel.b.y, sel.e.y);
652 }
653
654 void
655 selrequest(XEvent *e) {
656 XSelectionRequestEvent *xsre;
657 XSelectionEvent xev;
658 Atom xa_targets;
659
660 xsre = (XSelectionRequestEvent *) e;
661 xev.type = SelectionNotify;
662 xev.requestor = xsre->requestor;
663 xev.selection = xsre->selection;
664 xev.target = xsre->target;
665 xev.time = xsre->time;
666 /* reject */
667 xev.property = None;
668
669 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
670 if(xsre->target == xa_targets) {
671 /* respond with the supported type */
672 Atom string = sel.xtarget;
673 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
674 XA_ATOM, 32, PropModeReplace,
675 (uchar *) &string, 1);
676 xev.property = xsre->property;
677 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
678 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
679 xsre->target, 8, PropModeReplace,
680 (uchar *) sel.clip, strlen(sel.clip));
681 xev.property = xsre->property;
682 }
683
684 /* all done, send a notification to the listener */
685 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
686 fprintf(stderr, "Error sending SelectionNotify event\n");
687 }
688
689 void
690 xsetsel(char *str) {
691 /* register the selection for both the clipboard and the primary */
692 Atom clipboard;
693
694 free(sel.clip);
695 sel.clip = str;
696
697 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
698
699 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
700 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
701 }
702
703 void
704 brelease(XEvent *e) {
705 if(IS_SET(MODE_MOUSE)) {
706 mousereport(e);
707 return;
708 }
709 if(e->xbutton.button == Button2)
710 selpaste();
711 else if(e->xbutton.button == Button1) {
712 sel.mode = 0;
713 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
714 term.dirty[sel.ey] = 1;
715 if(sel.bx == sel.ex && sel.by == sel.ey) {
716 struct timeval now;
717 sel.bx = -1;
718 gettimeofday(&now, NULL);
719
720 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
721 /* triple click on the line */
722 sel.b.x = sel.bx = 0;
723 sel.e.x = sel.ex = term.col;
724 sel.b.y = sel.e.y = sel.ey;
725 selcopy();
726 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
727 /* double click to select word */
728 sel.bx = sel.ex;
729 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
730 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
731 sel.b.x = sel.bx;
732 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
733 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
734 sel.e.x = sel.ex;
735 sel.b.y = sel.e.y = sel.ey;
736 selcopy();
737 }
738 } else
739 selcopy();
740 }
741 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
742 gettimeofday(&sel.tclick1, NULL);
743 }
744
745 void
746 bmotion(XEvent *e) {
747 if(IS_SET(MODE_MOUSE)) {
748 mousereport(e);
749 return;
750 }
751 if(sel.mode) {
752 int oldey = sel.ey, oldex = sel.ex;
753 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
754
755 if(oldey != sel.ey || oldex != sel.ex) {
756 int starty = MIN(oldey, sel.ey);
757 int endy = MAX(oldey, sel.ey);
758 tsetdirt(starty, endy);
759 }
760 }
761 }
762
763 void
764 die(const char *errstr, ...) {
765 va_list ap;
766
767 va_start(ap, errstr);
768 vfprintf(stderr, errstr, ap);
769 va_end(ap);
770 exit(EXIT_FAILURE);
771 }
772
773 void
774 execsh(void) {
775 char **args;
776 char *envshell = getenv("SHELL");
777
778 unsetenv("COLUMNS");
779 unsetenv("LINES");
780 unsetenv("TERMCAP");
781
782 signal(SIGCHLD, SIG_DFL);
783 signal(SIGHUP, SIG_DFL);
784 signal(SIGINT, SIG_DFL);
785 signal(SIGQUIT, SIG_DFL);
786 signal(SIGTERM, SIG_DFL);
787 signal(SIGALRM, SIG_DFL);
788
789 DEFAULT(envshell, SHELL);
790 putenv("TERM="TNAME);
791 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
792 execvp(args[0], args);
793 exit(EXIT_FAILURE);
794 }
795
796 void
797 sigchld(int a) {
798 int stat = 0;
799 if(waitpid(pid, &stat, 0) < 0)
800 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
801 if(WIFEXITED(stat))
802 exit(WEXITSTATUS(stat));
803 else
804 exit(EXIT_FAILURE);
805 }
806
807 void
808 ttynew(void) {
809 int m, s;
810
811 /* seems to work fine on linux, openbsd and freebsd */
812 struct winsize w = {term.row, term.col, 0, 0};
813 if(openpty(&m, &s, NULL, NULL, &w) < 0)
814 die("openpty failed: %s\n", SERRNO);
815
816 switch(pid = fork()) {
817 case -1:
818 die("fork failed\n");
819 break;
820 case 0:
821 setsid(); /* create a new process group */
822 dup2(s, STDIN_FILENO);
823 dup2(s, STDOUT_FILENO);
824 dup2(s, STDERR_FILENO);
825 if(ioctl(s, TIOCSCTTY, NULL) < 0)
826 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
827 close(s);
828 close(m);
829 execsh();
830 break;
831 default:
832 close(s);
833 cmdfd = m;
834 signal(SIGCHLD, sigchld);
835 if(opt_io) {
836 if(!strcmp(opt_io, "-")) {
837 iofd = STDOUT_FILENO;
838 } else {
839 if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
840 fprintf(stderr, "Error opening %s:%s\n",
841 opt_io, strerror(errno));
842 }
843 }
844 }
845 }
846 }
847
848 void
849 dump(char c) {
850 static int col;
851 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
852 if(++col % 10 == 0)
853 fprintf(stderr, "\n");
854 }
855
856 void
857 ttyread(void) {
858 static char buf[BUFSIZ];
859 static int buflen = 0;
860 char *ptr;
861 char s[UTF_SIZ];
862 int charsize; /* size of utf8 char in bytes */
863 long utf8c;
864 int ret;
865
866 /* append read bytes to unprocessed bytes */
867 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
868 die("Couldn't read from shell: %s\n", SERRNO);
869
870 /* process every complete utf8 char */
871 buflen += ret;
872 ptr = buf;
873 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
874 charsize = utf8decode(ptr, &utf8c);
875 utf8encode(&utf8c, s);
876 tputc(s);
877 ptr += charsize;
878 buflen -= charsize;
879 }
880
881 /* keep any uncomplete utf8 char for the next call */
882 memmove(buf, ptr, buflen);
883 }
884
885 void
886 ttywrite(const char *s, size_t n) {
887 if(write(cmdfd, s, n) == -1)
888 die("write error on tty: %s\n", SERRNO);
889 }
890
891 void
892 ttyresize(int x, int y) {
893 struct winsize w;
894
895 w.ws_row = term.row;
896 w.ws_col = term.col;
897 w.ws_xpixel = xw.w;
898 w.ws_ypixel = xw.h;
899 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
900 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
901 }
902
903 void
904 tsetdirt(int top, int bot)
905 {
906 int i;
907
908 LIMIT(top, 0, term.row-1);
909 LIMIT(bot, 0, term.row-1);
910
911 for(i = top; i <= bot; i++)
912 term.dirty[i] = 1;
913 }
914
915 void
916 tfulldirt(void)
917 {
918 tsetdirt(0, term.row-1);
919 }
920
921 void
922 tcursor(int mode) {
923 static TCursor c;
924
925 if(mode == CURSOR_SAVE)
926 c = term.c;
927 else if(mode == CURSOR_LOAD)
928 term.c = c, tmoveto(c.x, c.y);
929 }
930
931 void
932 treset(void) {
933 unsigned i;
934 term.c = (TCursor){{
935 .mode = ATTR_NULL,
936 .fg = DefaultFG,
937 .bg = DefaultBG
938 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
939
940 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
941 for(i = TAB; i < term.col; i += TAB)
942 term.tabs[i] = 1;
943 term.top = 0, term.bot = term.row - 1;
944 term.mode = MODE_WRAP;
945 tclearregion(0, 0, term.col-1, term.row-1);
946 }
947
948 void
949 tnew(int col, int row) {
950 /* set screen size */
951 term.row = row, term.col = col;
952 term.line = xmalloc(term.row * sizeof(Line));
953 term.alt = xmalloc(term.row * sizeof(Line));
954 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
955 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
956
957 for(row = 0; row < term.row; row++) {
958 term.line[row] = xmalloc(term.col * sizeof(Glyph));
959 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
960 term.dirty[row] = 0;
961 }
962 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
963 /* setup screen */
964 treset();
965 }
966
967 void
968 tswapscreen(void) {
969 Line* tmp = term.line;
970 term.line = term.alt;
971 term.alt = tmp;
972 term.mode ^= MODE_ALTSCREEN;
973 tfulldirt();
974 }
975
976 void
977 tscrolldown(int orig, int n) {
978 int i;
979 Line temp;
980
981 LIMIT(n, 0, term.bot-orig+1);
982
983 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
984
985 for(i = term.bot; i >= orig+n; i--) {
986 temp = term.line[i];
987 term.line[i] = term.line[i-n];
988 term.line[i-n] = temp;
989
990 term.dirty[i] = 1;
991 term.dirty[i-n] = 1;
992 }
993
994 selscroll(orig, n);
995 }
996
997 void
998 tscrollup(int orig, int n) {
999 int i;
1000 Line temp;
1001 LIMIT(n, 0, term.bot-orig+1);
1002
1003 tclearregion(0, orig, term.col-1, orig+n-1);
1004
1005 for(i = orig; i <= term.bot-n; i++) {
1006 temp = term.line[i];
1007 term.line[i] = term.line[i+n];
1008 term.line[i+n] = temp;
1009
1010 term.dirty[i] = 1;
1011 term.dirty[i+n] = 1;
1012 }
1013
1014 selscroll(orig, -n);
1015 }
1016
1017 void
1018 selscroll(int orig, int n) {
1019 if(sel.bx == -1)
1020 return;
1021
1022 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1023 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1024 sel.bx = -1;
1025 return;
1026 }
1027 if(sel.by < term.top) {
1028 sel.by = term.top;
1029 sel.bx = 0;
1030 }
1031 if(sel.ey > term.bot) {
1032 sel.ey = term.bot;
1033 sel.ex = term.col;
1034 }
1035 sel.b.y = sel.by, sel.b.x = sel.bx;
1036 sel.e.y = sel.ey, sel.e.x = sel.ex;
1037 }
1038 }
1039
1040 void
1041 tnewline(int first_col) {
1042 int y = term.c.y;
1043 if(y == term.bot)
1044 tscrollup(term.top, 1);
1045 else
1046 y++;
1047 tmoveto(first_col ? 0 : term.c.x, y);
1048 }
1049
1050 void
1051 csiparse(void) {
1052 /* int noarg = 1; */
1053 char *p = csiescseq.buf;
1054
1055 csiescseq.narg = 0;
1056 if(*p == '?')
1057 csiescseq.priv = 1, p++;
1058
1059 while(p < csiescseq.buf+csiescseq.len) {
1060 while(isdigit(*p)) {
1061 csiescseq.arg[csiescseq.narg] *= 10;
1062 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1063 }
1064 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1065 csiescseq.narg++, p++;
1066 else {
1067 csiescseq.mode = *p;
1068 csiescseq.narg++;
1069 return;
1070 }
1071 }
1072 }
1073
1074 void
1075 tmoveto(int x, int y) {
1076 LIMIT(x, 0, term.col-1);
1077 LIMIT(y, 0, term.row-1);
1078 term.c.state &= ~CURSOR_WRAPNEXT;
1079 term.c.x = x;
1080 term.c.y = y;
1081 }
1082
1083 void
1084 tsetchar(char *c) {
1085 term.dirty[term.c.y] = 1;
1086 term.line[term.c.y][term.c.x] = term.c.attr;
1087 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1088 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1089 }
1090
1091 void
1092 tclearregion(int x1, int y1, int x2, int y2) {
1093 int x, y, temp;
1094
1095 if(x1 > x2)
1096 temp = x1, x1 = x2, x2 = temp;
1097 if(y1 > y2)
1098 temp = y1, y1 = y2, y2 = temp;
1099
1100 LIMIT(x1, 0, term.col-1);
1101 LIMIT(x2, 0, term.col-1);
1102 LIMIT(y1, 0, term.row-1);
1103 LIMIT(y2, 0, term.row-1);
1104
1105 for(y = y1; y <= y2; y++) {
1106 term.dirty[y] = 1;
1107 for(x = x1; x <= x2; x++)
1108 term.line[y][x].state = 0;
1109 }
1110 }
1111
1112 void
1113 tdeletechar(int n) {
1114 int src = term.c.x + n;
1115 int dst = term.c.x;
1116 int size = term.col - src;
1117
1118 term.dirty[term.c.y] = 1;
1119
1120 if(src >= term.col) {
1121 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1122 return;
1123 }
1124 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1125 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1126 }
1127
1128 void
1129 tinsertblank(int n) {
1130 int src = term.c.x;
1131 int dst = src + n;
1132 int size = term.col - dst;
1133
1134 term.dirty[term.c.y] = 1;
1135
1136 if(dst >= term.col) {
1137 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1138 return;
1139 }
1140 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1141 tclearregion(src, term.c.y, dst - 1, term.c.y);
1142 }
1143
1144 void
1145 tinsertblankline(int n) {
1146 if(term.c.y < term.top || term.c.y > term.bot)
1147 return;
1148
1149 tscrolldown(term.c.y, n);
1150 }
1151
1152 void
1153 tdeleteline(int n) {
1154 if(term.c.y < term.top || term.c.y > term.bot)
1155 return;
1156
1157 tscrollup(term.c.y, n);
1158 }
1159
1160 void
1161 tsetattr(int *attr, int l) {
1162 int i;
1163
1164 for(i = 0; i < l; i++) {
1165 switch(attr[i]) {
1166 case 0:
1167 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1168 | ATTR_ITALIC | ATTR_BLINK);
1169 term.c.attr.fg = DefaultFG;
1170 term.c.attr.bg = DefaultBG;
1171 break;
1172 case 1:
1173 term.c.attr.mode |= ATTR_BOLD;
1174 break;
1175 case 3: /* enter standout (highlight) */
1176 term.c.attr.mode |= ATTR_ITALIC;
1177 break;
1178 case 4:
1179 term.c.attr.mode |= ATTR_UNDERLINE;
1180 break;
1181 case 5:
1182 term.c.attr.mode |= ATTR_BLINK;
1183 break;
1184 case 7:
1185 term.c.attr.mode |= ATTR_REVERSE;
1186 break;
1187 case 21:
1188 case 22:
1189 term.c.attr.mode &= ~ATTR_BOLD;
1190 break;
1191 case 23: /* leave standout (highlight) mode */
1192 term.c.attr.mode &= ~ATTR_ITALIC;
1193 break;
1194 case 24:
1195 term.c.attr.mode &= ~ATTR_UNDERLINE;
1196 break;
1197 case 25:
1198 term.c.attr.mode &= ~ATTR_BLINK;
1199 break;
1200 case 27:
1201 term.c.attr.mode &= ~ATTR_REVERSE;
1202 break;
1203 case 38:
1204 if(i + 2 < l && attr[i + 1] == 5) {
1205 i += 2;
1206 if(BETWEEN(attr[i], 0, 255))
1207 term.c.attr.fg = attr[i];
1208 else
1209 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1210 }
1211 else
1212 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1213 break;
1214 case 39:
1215 term.c.attr.fg = DefaultFG;
1216 break;
1217 case 48:
1218 if(i + 2 < l && attr[i + 1] == 5) {
1219 i += 2;
1220 if(BETWEEN(attr[i], 0, 255))
1221 term.c.attr.bg = attr[i];
1222 else
1223 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1224 }
1225 else
1226 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1227 break;
1228 case 49:
1229 term.c.attr.bg = DefaultBG;
1230 break;
1231 default:
1232 if(BETWEEN(attr[i], 30, 37))
1233 term.c.attr.fg = attr[i] - 30;
1234 else if(BETWEEN(attr[i], 40, 47))
1235 term.c.attr.bg = attr[i] - 40;
1236 else if(BETWEEN(attr[i], 90, 97))
1237 term.c.attr.fg = attr[i] - 90 + 8;
1238 else if(BETWEEN(attr[i], 100, 107))
1239 term.c.attr.bg = attr[i] - 100 + 8;
1240 else
1241 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1242 break;
1243 }
1244 }
1245 }
1246
1247 void
1248 tsetscroll(int t, int b) {
1249 int temp;
1250
1251 LIMIT(t, 0, term.row-1);
1252 LIMIT(b, 0, term.row-1);
1253 if(t > b) {
1254 temp = t;
1255 t = b;
1256 b = temp;
1257 }
1258 term.top = t;
1259 term.bot = b;
1260 }
1261
1262 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1263
1264 void
1265 tsetmode(bool priv, bool set, int *args, int narg) {
1266 int *lim, mode;
1267
1268 for(lim = args + narg; args < lim; ++args) {
1269 if(priv) {
1270 switch(*args) {
1271 case 1:
1272 MODBIT(term.mode, set, MODE_APPKEYPAD);
1273 break;
1274 case 5: /* DECSCNM -- Reverve video */
1275 mode = term.mode;
1276 MODBIT(term.mode,set, MODE_REVERSE);
1277 if(mode != term.mode)
1278 redraw();
1279 break;
1280 case 7:
1281 MODBIT(term.mode, set, MODE_WRAP);
1282 break;
1283 case 20:
1284 MODBIT(term.mode, set, MODE_CRLF);
1285 break;
1286 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1287 break;
1288 case 25:
1289 MODBIT(term.c.state, !set, CURSOR_HIDE);
1290 break;
1291 case 1000: /* 1000,1002: enable xterm mouse report */
1292 MODBIT(term.mode, set, MODE_MOUSEBTN);
1293 break;
1294 case 1002:
1295 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1296 break;
1297 case 1049: /* = 1047 and 1048 */
1298 case 47:
1299 case 1047:
1300 if(IS_SET(MODE_ALTSCREEN))
1301 tclearregion(0, 0, term.col-1, term.row-1);
1302 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1303 (!set && IS_SET(MODE_ALTSCREEN))) {
1304 tswapscreen();
1305 }
1306 if(*args != 1049)
1307 break;
1308 /* pass through */
1309 case 1048:
1310 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1311 break;
1312 default:
1313 fprintf(stderr,
1314 "erresc: unknown private set/reset mode %d\n",
1315 *args);
1316 break;
1317 }
1318 } else {
1319 switch(*args) {
1320 case 4:
1321 MODBIT(term.mode, set, MODE_INSERT);
1322 break;
1323 default:
1324 fprintf(stderr,
1325 "erresc: unknown set/reset mode %d\n",
1326 *args);
1327 break;
1328 }
1329 }
1330 }
1331 }
1332 #undef MODBIT
1333
1334
1335 void
1336 csihandle(void) {
1337 switch(csiescseq.mode) {
1338 default:
1339 unknown:
1340 fprintf(stderr, "erresc: unknown csi ");
1341 csidump();
1342 /* die(""); */
1343 break;
1344 case '@': /* ICH -- Insert <n> blank char */
1345 DEFAULT(csiescseq.arg[0], 1);
1346 tinsertblank(csiescseq.arg[0]);
1347 break;
1348 case 'A': /* CUU -- Cursor <n> Up */
1349 case 'e':
1350 DEFAULT(csiescseq.arg[0], 1);
1351 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1352 break;
1353 case 'B': /* CUD -- Cursor <n> Down */
1354 DEFAULT(csiescseq.arg[0], 1);
1355 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1356 break;
1357 case 'C': /* CUF -- Cursor <n> Forward */
1358 case 'a':
1359 DEFAULT(csiescseq.arg[0], 1);
1360 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1361 break;
1362 case 'D': /* CUB -- Cursor <n> Backward */
1363 DEFAULT(csiescseq.arg[0], 1);
1364 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1365 break;
1366 case 'E': /* CNL -- Cursor <n> Down and first col */
1367 DEFAULT(csiescseq.arg[0], 1);
1368 tmoveto(0, term.c.y+csiescseq.arg[0]);
1369 break;
1370 case 'F': /* CPL -- Cursor <n> Up and first col */
1371 DEFAULT(csiescseq.arg[0], 1);
1372 tmoveto(0, term.c.y-csiescseq.arg[0]);
1373 break;
1374 case 'g': /* TBC -- Tabulation clear */
1375 switch (csiescseq.arg[0]) {
1376 case 0: /* clear current tab stop */
1377 term.tabs[term.c.x] = 0;
1378 break;
1379 case 3: /* clear all the tabs */
1380 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1381 break;
1382 default:
1383 goto unknown;
1384 }
1385 break;
1386 case 'G': /* CHA -- Move to <col> */
1387 case '`': /* HPA */
1388 DEFAULT(csiescseq.arg[0], 1);
1389 tmoveto(csiescseq.arg[0]-1, term.c.y);
1390 break;
1391 case 'H': /* CUP -- Move to <row> <col> */
1392 case 'f': /* HVP */
1393 DEFAULT(csiescseq.arg[0], 1);
1394 DEFAULT(csiescseq.arg[1], 1);
1395 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1396 break;
1397 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1398 DEFAULT(csiescseq.arg[0], 1);
1399 while(csiescseq.arg[0]--)
1400 tputtab(1);
1401 break;
1402 case 'J': /* ED -- Clear screen */
1403 sel.bx = -1;
1404 switch(csiescseq.arg[0]) {
1405 case 0: /* below */
1406 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1407 if(term.c.y < term.row-1)
1408 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1409 break;
1410 case 1: /* above */
1411 if(term.c.y > 1)
1412 tclearregion(0, 0, term.col-1, term.c.y-1);
1413 tclearregion(0, term.c.y, term.c.x, term.c.y);
1414 break;
1415 case 2: /* all */
1416 tclearregion(0, 0, term.col-1, term.row-1);
1417 break;
1418 default:
1419 goto unknown;
1420 }
1421 break;
1422 case 'K': /* EL -- Clear line */
1423 switch(csiescseq.arg[0]) {
1424 case 0: /* right */
1425 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1426 break;
1427 case 1: /* left */
1428 tclearregion(0, term.c.y, term.c.x, term.c.y);
1429 break;
1430 case 2: /* all */
1431 tclearregion(0, term.c.y, term.col-1, term.c.y);
1432 break;
1433 }
1434 break;
1435 case 'S': /* SU -- Scroll <n> line up */
1436 DEFAULT(csiescseq.arg[0], 1);
1437 tscrollup(term.top, csiescseq.arg[0]);
1438 break;
1439 case 'T': /* SD -- Scroll <n> line down */
1440 DEFAULT(csiescseq.arg[0], 1);
1441 tscrolldown(term.top, csiescseq.arg[0]);
1442 break;
1443 case 'L': /* IL -- Insert <n> blank lines */
1444 DEFAULT(csiescseq.arg[0], 1);
1445 tinsertblankline(csiescseq.arg[0]);
1446 break;
1447 case 'l': /* RM -- Reset Mode */
1448 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1449 break;
1450 case 'M': /* DL -- Delete <n> lines */
1451 DEFAULT(csiescseq.arg[0], 1);
1452 tdeleteline(csiescseq.arg[0]);
1453 break;
1454 case 'X': /* ECH -- Erase <n> char */
1455 DEFAULT(csiescseq.arg[0], 1);
1456 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1457 break;
1458 case 'P': /* DCH -- Delete <n> char */
1459 DEFAULT(csiescseq.arg[0], 1);
1460 tdeletechar(csiescseq.arg[0]);
1461 break;
1462 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1463 DEFAULT(csiescseq.arg[0], 1);
1464 while(csiescseq.arg[0]--)
1465 tputtab(0);
1466 break;
1467 case 'd': /* VPA -- Move to <row> */
1468 DEFAULT(csiescseq.arg[0], 1);
1469 tmoveto(term.c.x, csiescseq.arg[0]-1);
1470 break;
1471 case 'h': /* SM -- Set terminal mode */
1472 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1473 break;
1474 case 'm': /* SGR -- Terminal attribute (color) */
1475 tsetattr(csiescseq.arg, csiescseq.narg);
1476 break;
1477 case 'r': /* DECSTBM -- Set Scrolling Region */
1478 if(csiescseq.priv)
1479 goto unknown;
1480 else {
1481 DEFAULT(csiescseq.arg[0], 1);
1482 DEFAULT(csiescseq.arg[1], term.row);
1483 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1484 tmoveto(0, 0);
1485 }
1486 break;
1487 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1488 tcursor(CURSOR_SAVE);
1489 break;
1490 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1491 tcursor(CURSOR_LOAD);
1492 break;
1493 }
1494 }
1495
1496 void
1497 csidump(void) {
1498 int i;
1499 printf("ESC[");
1500 for(i = 0; i < csiescseq.len; i++) {
1501 uint c = csiescseq.buf[i] & 0xff;
1502 if(isprint(c)) putchar(c);
1503 else if(c == '\n') printf("(\\n)");
1504 else if(c == '\r') printf("(\\r)");
1505 else if(c == 0x1b) printf("(\\e)");
1506 else printf("(%02x)", c);
1507 }
1508 putchar('\n');
1509 }
1510
1511 void
1512 csireset(void) {
1513 memset(&csiescseq, 0, sizeof(csiescseq));
1514 }
1515
1516 void
1517 strhandle(void) {
1518 char *p;
1519
1520 /*
1521 * TODO: make this being useful in case of color palette change.
1522 */
1523 strparse();
1524
1525 p = strescseq.buf;
1526
1527 switch(strescseq.type) {
1528 case ']': /* OSC -- Operating System Command */
1529 switch(p[0]) {
1530 case '0':
1531 case '1':
1532 case '2':
1533 /*
1534 * TODO: Handle special chars in string, like umlauts.
1535 */
1536 if(p[1] == ';') {
1537 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1538 }
1539 break;
1540 case ';':
1541 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1542 break;
1543 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1544 break;
1545 default:
1546 fprintf(stderr, "erresc: unknown str ");
1547 strdump();
1548 break;
1549 }
1550 break;
1551 case 'k': /* old title set compatibility */
1552 XStoreName(xw.dpy, xw.win, strescseq.buf);
1553 break;
1554 case 'P': /* DSC -- Device Control String */
1555 case '_': /* APC -- Application Program Command */
1556 case '^': /* PM -- Privacy Message */
1557 default:
1558 fprintf(stderr, "erresc: unknown str ");
1559 strdump();
1560 /* die(""); */
1561 break;
1562 }
1563 }
1564
1565 void
1566 strparse(void) {
1567 /*
1568 * TODO: Implement parsing like for CSI when required.
1569 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1570 */
1571 return;
1572 }
1573
1574 void
1575 strdump(void) {
1576 int i;
1577 printf("ESC%c", strescseq.type);
1578 for(i = 0; i < strescseq.len; i++) {
1579 uint c = strescseq.buf[i] & 0xff;
1580 if(isprint(c)) putchar(c);
1581 else if(c == '\n') printf("(\\n)");
1582 else if(c == '\r') printf("(\\r)");
1583 else if(c == 0x1b) printf("(\\e)");
1584 else printf("(%02x)", c);
1585 }
1586 printf("ESC\\\n");
1587 }
1588
1589 void
1590 strreset(void) {
1591 memset(&strescseq, 0, sizeof(strescseq));
1592 }
1593
1594 void
1595 tputtab(bool forward) {
1596 unsigned x = term.c.x;
1597
1598 if(forward) {
1599 if(x == term.col)
1600 return;
1601 for(++x; x < term.col && !term.tabs[x]; ++x)
1602 /* nothing */ ;
1603 } else {
1604 if(x == 0)
1605 return;
1606 for(--x; x > 0 && !term.tabs[x]; --x)
1607 /* nothing */ ;
1608 }
1609 tmoveto(x, term.c.y);
1610 }
1611
1612 void
1613 tputc(char *c) {
1614 char ascii = *c;
1615
1616 if(iofd != -1)
1617 write(iofd, c, 1);
1618
1619 if(term.esc & ESC_START) {
1620 if(term.esc & ESC_CSI) {
1621 csiescseq.buf[csiescseq.len++] = ascii;
1622 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1623 term.esc = 0;
1624 csiparse(), csihandle();
1625 }
1626 } else if(term.esc & ESC_STR) {
1627 switch(ascii) {
1628 case '\033':
1629 term.esc = ESC_START | ESC_STR_END;
1630 break;
1631 case '\a': /* backwards compatibility to xterm */
1632 term.esc = 0;
1633 strhandle();
1634 break;
1635 default:
1636 strescseq.buf[strescseq.len++] = ascii;
1637 if(strescseq.len+1 >= STR_BUF_SIZ) {
1638 term.esc = 0;
1639 strhandle();
1640 }
1641 }
1642 } else if(term.esc & ESC_STR_END) {
1643 term.esc = 0;
1644 if(ascii == '\\')
1645 strhandle();
1646 } else if(term.esc & ESC_ALTCHARSET) {
1647 switch(ascii) {
1648 case '0': /* Line drawing crap */
1649 term.c.attr.mode |= ATTR_GFX;
1650 break;
1651 case 'B': /* Back to regular text */
1652 term.c.attr.mode &= ~ATTR_GFX;
1653 break;
1654 default:
1655 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1656 }
1657 term.esc = 0;
1658 } else {
1659 switch(ascii) {
1660 case '[':
1661 term.esc |= ESC_CSI;
1662 break;
1663 case 'P': /* DCS -- Device Control String */
1664 case '_': /* APC -- Application Program Command */
1665 case '^': /* PM -- Privacy Message */
1666 case ']': /* OSC -- Operating System Command */
1667 case 'k': /* old title set compatibility */
1668 strreset();
1669 strescseq.type = ascii;
1670 term.esc |= ESC_STR;
1671 break;
1672 case '(':
1673 term.esc |= ESC_ALTCHARSET;
1674 break;
1675 case 'D': /* IND -- Linefeed */
1676 if(term.c.y == term.bot)
1677 tscrollup(term.top, 1);
1678 else
1679 tmoveto(term.c.x, term.c.y+1);
1680 term.esc = 0;
1681 break;
1682 case 'E': /* NEL -- Next line */
1683 tnewline(1); /* always go to first col */
1684 term.esc = 0;
1685 break;
1686 case 'H': /* HTS -- Horizontal tab stop */
1687 term.tabs[term.c.x] = 1;
1688 term.esc = 0;
1689 break;
1690 case 'M': /* RI -- Reverse index */
1691 if(term.c.y == term.top)
1692 tscrolldown(term.top, 1);
1693 else
1694 tmoveto(term.c.x, term.c.y-1);
1695 term.esc = 0;
1696 break;
1697 case 'c': /* RIS -- Reset to inital state */
1698 treset();
1699 term.esc = 0;
1700 xresettitle();
1701 break;
1702 case '=': /* DECPAM -- Application keypad */
1703 term.mode |= MODE_APPKEYPAD;
1704 term.esc = 0;
1705 break;
1706 case '>': /* DECPNM -- Normal keypad */
1707 term.mode &= ~MODE_APPKEYPAD;
1708 term.esc = 0;
1709 break;
1710 case '7': /* DECSC -- Save Cursor */
1711 tcursor(CURSOR_SAVE);
1712 term.esc = 0;
1713 break;
1714 case '8': /* DECRC -- Restore Cursor */
1715 tcursor(CURSOR_LOAD);
1716 term.esc = 0;
1717 break;
1718 case '\\': /* ST -- Stop */
1719 term.esc = 0;
1720 break;
1721 default:
1722 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1723 (uchar) ascii, isprint(ascii)?ascii:'.');
1724 term.esc = 0;
1725 }
1726 }
1727 } else {
1728 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1729 sel.bx = -1;
1730 switch(ascii) {
1731 case '\0': /* padding character, do nothing */
1732 break;
1733 case '\t':
1734 tputtab(1);
1735 break;
1736 case '\b':
1737 tmoveto(term.c.x-1, term.c.y);
1738 break;
1739 case '\r':
1740 tmoveto(0, term.c.y);
1741 break;
1742 case '\f':
1743 case '\v':
1744 case '\n':
1745 /* go to first col if the mode is set */
1746 tnewline(IS_SET(MODE_CRLF));
1747 break;
1748 case '\a':
1749 if(!(xw.state & WIN_FOCUSED))
1750 xseturgency(1);
1751 break;
1752 case '\033':
1753 csireset();
1754 term.esc = ESC_START;
1755 break;
1756 default:
1757 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1758 tnewline(1); /* always go to first col */
1759 tsetchar(c);
1760 if(term.c.x+1 < term.col)
1761 tmoveto(term.c.x+1, term.c.y);
1762 else
1763 term.c.state |= CURSOR_WRAPNEXT;
1764 }
1765 }
1766 }
1767
1768 int
1769 tresize(int col, int row) {
1770 int i, x;
1771 int minrow = MIN(row, term.row);
1772 int mincol = MIN(col, term.col);
1773 int slide = term.c.y - row + 1;
1774
1775 if(col < 1 || row < 1)
1776 return 0;
1777
1778 /* free unneeded rows */
1779 i = 0;
1780 if(slide > 0) {
1781 /* slide screen to keep cursor where we expect it -
1782 * tscrollup would work here, but we can optimize to
1783 * memmove because we're freeing the earlier lines */
1784 for(/* i = 0 */; i < slide; i++) {
1785 free(term.line[i]);
1786 free(term.alt[i]);
1787 }
1788 memmove(term.line, term.line + slide, row * sizeof(Line));
1789 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1790 }
1791 for(i += row; i < term.row; i++) {
1792 free(term.line[i]);
1793 free(term.alt[i]);
1794 }
1795
1796 /* resize to new height */
1797 term.line = xrealloc(term.line, row * sizeof(Line));
1798 term.alt = xrealloc(term.alt, row * sizeof(Line));
1799 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
1800 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
1801
1802 /* resize each row to new width, zero-pad if needed */
1803 for(i = 0; i < minrow; i++) {
1804 term.dirty[i] = 1;
1805 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
1806 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
1807 for(x = mincol; x < col; x++) {
1808 term.line[i][x].state = 0;
1809 term.alt[i][x].state = 0;
1810 }
1811 }
1812
1813 /* allocate any new rows */
1814 for(/* i == minrow */; i < row; i++) {
1815 term.dirty[i] = 1;
1816 term.line[i] = xcalloc(col, sizeof(Glyph));
1817 term.alt [i] = xcalloc(col, sizeof(Glyph));
1818 }
1819 if(col > term.col) {
1820 bool *bp = term.tabs + term.col;
1821
1822 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1823 while(--bp > term.tabs && !*bp)
1824 /* nothing */ ;
1825 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1826 *bp = 1;
1827 }
1828 /* update terminal size */
1829 term.col = col, term.row = row;
1830 /* make use of the LIMIT in tmoveto */
1831 tmoveto(term.c.x, term.c.y);
1832 /* reset scrolling region */
1833 tsetscroll(0, row-1);
1834
1835 return (slide > 0);
1836 }
1837
1838 void
1839 xresize(int col, int row) {
1840 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1841 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1842 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0,
1843 DisplayWidth(xw.dpy, xw.scr),
1844 DisplayHeight(xw.dpy, xw.scr));
1845 }
1846
1847 void
1848 xloadcols(void) {
1849 int i, r, g, b;
1850 XColor color;
1851 ulong white = WhitePixel(xw.dpy, xw.scr);
1852
1853 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1854 for(i = 0; i < LEN(colorname); i++) {
1855 if(!colorname[i])
1856 continue;
1857 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1858 dc.col[i] = white;
1859 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1860 } else
1861 dc.col[i] = color.pixel;
1862 }
1863
1864 /* load colors [16-255] ; same colors as xterm */
1865 for(i = 16, r = 0; r < 6; r++)
1866 for(g = 0; g < 6; g++)
1867 for(b = 0; b < 6; b++) {
1868 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1869 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1870 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1871 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1872 dc.col[i] = white;
1873 fprintf(stderr, "Could not allocate color %d\n", i);
1874 } else
1875 dc.col[i] = color.pixel;
1876 i++;
1877 }
1878
1879 for(r = 0; r < 24; r++, i++) {
1880 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1881 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1882 dc.col[i] = white;
1883 fprintf(stderr, "Could not allocate color %d\n", i);
1884 } else
1885 dc.col[i] = color.pixel;
1886 }
1887 }
1888
1889 void
1890 xclear(int x1, int y1, int x2, int y2) {
1891 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1892 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1893 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1894 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1895 }
1896
1897 void
1898 xhints(void) {
1899 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1900 XWMHints wm = {.flags = InputHint, .input = 1};
1901 XSizeHints *sizeh = NULL;
1902
1903 sizeh = XAllocSizeHints();
1904 if(xw.isfixed == False) {
1905 sizeh->flags = PSize | PResizeInc | PBaseSize;
1906 sizeh->height = xw.h;
1907 sizeh->width = xw.w;
1908 sizeh->height_inc = xw.ch;
1909 sizeh->width_inc = xw.cw;
1910 sizeh->base_height = 2*BORDER;
1911 sizeh->base_width = 2*BORDER;
1912 } else {
1913 sizeh->flags = PMaxSize | PMinSize;
1914 sizeh->min_width = sizeh->max_width = xw.fw;
1915 sizeh->min_height = sizeh->max_height = xw.fh;
1916 }
1917
1918 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1919 XFree(sizeh);
1920 }
1921
1922 XFontSet
1923 xinitfont(char *fontstr) {
1924 XFontSet set;
1925 char *def, **missing;
1926 int n;
1927
1928 missing = NULL;
1929 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1930 if(missing) {
1931 while(n--)
1932 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1933 XFreeStringList(missing);
1934 }
1935 return set;
1936 }
1937
1938 void
1939 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1940 XFontStruct **xfonts;
1941 char **font_names;
1942 int i, n;
1943
1944 *ascent = *descent = *lbearing = *rbearing = 0;
1945 n = XFontsOfFontSet(set, &xfonts, &font_names);
1946 for(i = 0; i < n; i++) {
1947 *ascent = MAX(*ascent, (*xfonts)->ascent);
1948 *descent = MAX(*descent, (*xfonts)->descent);
1949 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1950 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1951 xfonts++;
1952 }
1953 }
1954
1955 void
1956 initfonts(char *fontstr, char *bfontstr, char *ifontstr, char *ibfontstr) {
1957 if((dc.font.set = xinitfont(fontstr)) == NULL)
1958 die("Can't load font %s\n", fontstr);
1959 if((dc.bfont.set = xinitfont(bfontstr)) == NULL)
1960 die("Can't load bfont %s\n", bfontstr);
1961 if((dc.ifont.set = xinitfont(ifontstr)) == NULL)
1962 die("Can't load ifont %s\n", ifontstr);
1963 if((dc.ibfont.set = xinitfont(ibfontstr)) == NULL)
1964 die("Can't load ibfont %s\n", ibfontstr);
1965
1966 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1967 &dc.font.lbearing, &dc.font.rbearing);
1968 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1969 &dc.bfont.lbearing, &dc.bfont.rbearing);
1970 xgetfontinfo(dc.ifont.set, &dc.ifont.ascent, &dc.ifont.descent,
1971 &dc.ifont.lbearing, &dc.ifont.rbearing);
1972 xgetfontinfo(dc.ibfont.set, &dc.ibfont.ascent, &dc.ibfont.descent,
1973 &dc.ibfont.lbearing, &dc.ibfont.rbearing);
1974 }
1975
1976 void
1977 xinit(void) {
1978 XSetWindowAttributes attrs;
1979 Cursor cursor;
1980 Window parent;
1981 int sw, sh, major, minor;
1982
1983 if(!(xw.dpy = XOpenDisplay(NULL)))
1984 die("Can't open display\n");
1985 xw.scr = XDefaultScreen(xw.dpy);
1986
1987 /* font */
1988 initfonts(FONT, BOLDFONT, ITALICFONT, ITALICBOLDFONT);
1989
1990 /* XXX: Assuming same size for bold font */
1991 xw.cw = dc.font.rbearing - dc.font.lbearing;
1992 xw.ch = dc.font.ascent + dc.font.descent;
1993
1994 /* colors */
1995 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1996 xloadcols();
1997
1998 /* adjust fixed window geometry */
1999 if(xw.isfixed) {
2000 sw = DisplayWidth(xw.dpy, xw.scr);
2001 sh = DisplayHeight(xw.dpy, xw.scr);
2002 if(xw.fx < 0)
2003 xw.fx = sw + xw.fx - xw.fw - 1;
2004 if(xw.fy < 0)
2005 xw.fy = sh + xw.fy - xw.fh - 1;
2006
2007 xw.h = xw.fh;
2008 xw.w = xw.fw;
2009 } else {
2010 /* window - default size */
2011 xw.h = 2*BORDER + term.row * xw.ch;
2012 xw.w = 2*BORDER + term.col * xw.cw;
2013 xw.fx = 0;
2014 xw.fy = 0;
2015 }
2016
2017 attrs.background_pixel = dc.col[DefaultBG];
2018 attrs.border_pixel = dc.col[DefaultBG];
2019 attrs.bit_gravity = NorthWestGravity;
2020 attrs.event_mask = FocusChangeMask | KeyPressMask
2021 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2022 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2023 attrs.colormap = xw.cmap;
2024
2025 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2026 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2027 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2028 XDefaultVisual(xw.dpy, xw.scr),
2029 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2030 | CWColormap,
2031 &attrs);
2032 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2033 die("Xdbe extension is not present\n");
2034 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2035
2036 /* input methods */
2037 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2038 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2039 | XIMStatusNothing, XNClientWindow, xw.win,
2040 XNFocusWindow, xw.win, NULL);
2041 /* gc */
2042 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2043
2044 /* white cursor, black outline */
2045 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2046 XDefineCursor(xw.dpy, xw.win, cursor);
2047 XRecolorCursor(xw.dpy, cursor,
2048 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2049 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2050
2051 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2052
2053 xresettitle();
2054 XMapWindow(xw.dpy, xw.win);
2055 xhints();
2056 XSync(xw.dpy, 0);
2057 }
2058
2059 void
2060 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2061 int fg = base.fg, bg = base.bg, temp;
2062 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
2063 XFontSet fontset = dc.font.set;
2064 int i;
2065
2066 /* only switch default fg/bg if term is in RV mode */
2067 if(IS_SET(MODE_REVERSE)) {
2068 if(fg == DefaultFG)
2069 fg = DefaultBG;
2070 if(bg == DefaultBG)
2071 bg = DefaultFG;
2072 }
2073
2074 if(base.mode & ATTR_REVERSE)
2075 temp = fg, fg = bg, bg = temp;
2076
2077 if(base.mode & ATTR_BOLD) {
2078 fg += 8;
2079 fontset = dc.bfont.set;
2080 }
2081
2082 if(base.mode & ATTR_ITALIC)
2083 fontset = dc.ifont.set;
2084 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2085 fontset = dc.ibfont.set;
2086
2087 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2088 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2089
2090 if(base.mode & ATTR_GFX) {
2091 for(i = 0; i < bytelen; i++) {
2092 char c = gfx[(uint)s[i] % 256];
2093 if(c)
2094 s[i] = c;
2095 else if(s[i] > 0x5f)
2096 s[i] -= 0x5f;
2097 }
2098 }
2099
2100 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
2101
2102 if(base.mode & ATTR_UNDERLINE)
2103 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2104 }
2105
2106 void
2107 xdrawcursor(void) {
2108 static int oldx = 0;
2109 static int oldy = 0;
2110 int sl;
2111 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2112
2113 LIMIT(oldx, 0, term.col-1);
2114 LIMIT(oldy, 0, term.row-1);
2115
2116 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2117 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2118
2119 /* remove the old cursor */
2120 if(term.line[oldy][oldx].state & GLYPH_SET) {
2121 sl = utf8size(term.line[oldy][oldx].c);
2122 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2123 } else
2124 xclear(oldx, oldy, oldx, oldy);
2125
2126 /* draw the new one */
2127 if(!(term.c.state & CURSOR_HIDE)) {
2128 if(!(xw.state & WIN_FOCUSED))
2129 g.bg = DefaultUCS;
2130
2131 if(IS_SET(MODE_REVERSE))
2132 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2133
2134 sl = utf8size(g.c);
2135 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2136 oldx = term.c.x, oldy = term.c.y;
2137 }
2138 }
2139
2140 void
2141 xresettitle(void) {
2142 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2143 }
2144
2145 void
2146 redraw(void) {
2147 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2148 tfulldirt();
2149 draw();
2150 XSync(xw.dpy, False); /* necessary for a good tput flash */
2151 nanosleep(&tv, NULL);
2152 }
2153
2154 void
2155 draw() {
2156 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2157
2158 drawregion(0, 0, term.col, term.row);
2159 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2160 }
2161
2162 void
2163 drawregion(int x1, int y1, int x2, int y2) {
2164 int ic, ib, x, y, ox, sl;
2165 Glyph base, new;
2166 char buf[DRAW_BUF_SIZ];
2167 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2168
2169 if((sel.alt && !alt) || (!sel.alt && alt))
2170 ena_sel = 0;
2171 if(!(xw.state & WIN_VISIBLE))
2172 return;
2173
2174 for(y = y1; y < y2; y++) {
2175 if(!term.dirty[y])
2176 continue;
2177 xclear(0, y, term.col, y);
2178 term.dirty[y] = 0;
2179 base = term.line[y][0];
2180 ic = ib = ox = 0;
2181 for(x = x1; x < x2; x++) {
2182 new = term.line[y][x];
2183 if(ena_sel && *(new.c) && selected(x, y))
2184 new.mode ^= ATTR_REVERSE;
2185 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2186 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2187 xdraws(buf, base, ox, y, ic, ib);
2188 ic = ib = 0;
2189 }
2190 if(new.state & GLYPH_SET) {
2191 if(ib == 0) {
2192 ox = x;
2193 base = new;
2194 }
2195 sl = utf8size(new.c);
2196 memcpy(buf+ib, new.c, sl);
2197 ib += sl;
2198 ++ic;
2199 }
2200 }
2201 if(ib > 0)
2202 xdraws(buf, base, ox, y, ic, ib);
2203 }
2204 xdrawcursor();
2205 }
2206
2207 void
2208 expose(XEvent *ev) {
2209 XExposeEvent *e = &ev->xexpose;
2210 if(xw.state & WIN_REDRAW) {
2211 if(!e->count)
2212 xw.state &= ~WIN_REDRAW;
2213 }
2214 }
2215
2216 void
2217 visibility(XEvent *ev) {
2218 XVisibilityEvent *e = &ev->xvisibility;
2219 if(e->state == VisibilityFullyObscured)
2220 xw.state &= ~WIN_VISIBLE;
2221 else if(!(xw.state & WIN_VISIBLE))
2222 /* need a full redraw for next Expose, not just a buf copy */
2223 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2224 }
2225
2226 void
2227 unmap(XEvent *ev) {
2228 xw.state &= ~WIN_VISIBLE;
2229 }
2230
2231 void
2232 xseturgency(int add) {
2233 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2234 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2235 XSetWMHints(xw.dpy, xw.win, h);
2236 XFree(h);
2237 }
2238
2239 void
2240 focus(XEvent *ev) {
2241 if(ev->type == FocusIn) {
2242 xw.state |= WIN_FOCUSED;
2243 xseturgency(0);
2244 } else
2245 xw.state &= ~WIN_FOCUSED;
2246 }
2247
2248 char*
2249 kmap(KeySym k, uint state) {
2250 int i;
2251 state &= ~Mod2Mask;
2252 for(i = 0; i < LEN(key); i++) {
2253 uint mask = key[i].mask;
2254 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2255 return (char*)key[i].s;
2256 }
2257 return NULL;
2258 }
2259
2260 void
2261 kpress(XEvent *ev) {
2262 XKeyEvent *e = &ev->xkey;
2263 KeySym ksym;
2264 char buf[32];
2265 char *customkey;
2266 int len;
2267 int meta;
2268 int shift;
2269 Status status;
2270
2271 meta = e->state & Mod1Mask;
2272 shift = e->state & ShiftMask;
2273 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2274
2275 /* 1. custom keys from config.h */
2276 if((customkey = kmap(ksym, e->state)))
2277 ttywrite(customkey, strlen(customkey));
2278 /* 2. hardcoded (overrides X lookup) */
2279 else
2280 switch(ksym) {
2281 case XK_Up:
2282 case XK_Down:
2283 case XK_Left:
2284 case XK_Right:
2285 /* XXX: shift up/down doesn't work */
2286 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2287 ttywrite(buf, 3);
2288 break;
2289 case XK_Insert:
2290 if(shift)
2291 selpaste();
2292 break;
2293 case XK_Return:
2294 if(IS_SET(MODE_CRLF))
2295 ttywrite("\r\n", 2);
2296 else
2297 ttywrite("\r", 1);
2298 break;
2299 /* 3. X lookup */
2300 default:
2301 if(len > 0) {
2302 if(meta && len == 1)
2303 ttywrite("\033", 1);
2304 ttywrite(buf, len);
2305 }
2306 break;
2307 }
2308 }
2309
2310 void
2311 cmessage(XEvent *e) {
2312 /* See xembed specs
2313 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2314 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2315 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2316 xw.state |= WIN_FOCUSED;
2317 xseturgency(0);
2318 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2319 xw.state &= ~WIN_FOCUSED;
2320 }
2321 }
2322 }
2323
2324 void
2325 resize(XEvent *e) {
2326 int col, row;
2327
2328 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2329 return;
2330
2331 xw.w = e->xconfigure.width;
2332 xw.h = e->xconfigure.height;
2333 col = (xw.w - 2*BORDER) / xw.cw;
2334 row = (xw.h - 2*BORDER) / xw.ch;
2335 if(col == term.col && row == term.row)
2336 return;
2337 tresize(col, row);
2338 xresize(col, row);
2339 ttyresize(col, row);
2340 }
2341
2342 void
2343 run(void) {
2344 XEvent ev;
2345 fd_set rfd;
2346 int xfd = XConnectionNumber(xw.dpy), i;
2347 struct timeval drawtimeout, *tv = NULL;
2348
2349 for(i = 0;; i++) {
2350 FD_ZERO(&rfd);
2351 FD_SET(cmdfd, &rfd);
2352 FD_SET(xfd, &rfd);
2353 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2354 if(errno == EINTR)
2355 continue;
2356 die("select failed: %s\n", SERRNO);
2357 }
2358
2359 /*
2360 * Stop after a certain number of reads so the user does not
2361 * feel like the system is stuttering.
2362 */
2363 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2364 ttyread();
2365
2366 /*
2367 * Just wait a bit so it isn't disturbing the
2368 * user and the system is able to write something.
2369 */
2370 drawtimeout.tv_sec = 0;
2371 drawtimeout.tv_usec = 5;
2372 tv = &drawtimeout;
2373 continue;
2374 }
2375 i = 0;
2376 tv = NULL;
2377
2378 while(XPending(xw.dpy)) {
2379 XNextEvent(xw.dpy, &ev);
2380 if(XFilterEvent(&ev, xw.win))
2381 continue;
2382 if(handler[ev.type])
2383 (handler[ev.type])(&ev);
2384 }
2385
2386 draw();
2387 XFlush(xw.dpy);
2388 }
2389 }
2390
2391 int
2392 main(int argc, char *argv[]) {
2393 int i, bitm, xr, yr;
2394 unsigned int wr, hr;
2395
2396 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2397 xw.isfixed = False;
2398
2399 for(i = 1; i < argc; i++) {
2400 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2401 case 't':
2402 if(++i < argc) opt_title = argv[i];
2403 break;
2404 case 'c':
2405 if(++i < argc) opt_class = argv[i];
2406 break;
2407 case 'w':
2408 if(++i < argc) opt_embed = argv[i];
2409 break;
2410 case 'f':
2411 if(++i < argc) opt_io = argv[i];
2412 break;
2413 case 'e':
2414 /* eat every remaining arguments */
2415 if(++i < argc) opt_cmd = &argv[i];
2416 goto run;
2417 case 'g':
2418 if(++i >= argc)
2419 break;
2420
2421 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2422 if(bitm & XValue)
2423 xw.fx = xr;
2424 if(bitm & YValue)
2425 xw.fy = yr;
2426 if(bitm & WidthValue)
2427 xw.fw = (int)wr;
2428 if(bitm & HeightValue)
2429 xw.fh = (int)hr;
2430 if(bitm & XNegative && xw.fx == 0)
2431 xw.fx = -1;
2432 if(bitm & XNegative && xw.fy == 0)
2433 xw.fy = -1;
2434
2435 if(xw.fh != 0 && xw.fw != 0)
2436 xw.isfixed = True;
2437 break;
2438 case 'v':
2439 default:
2440 die(USAGE);
2441 }
2442 }
2443
2444 run:
2445 setlocale(LC_CTYPE, "");
2446 tnew(80, 24);
2447 ttynew();
2448 xinit();
2449 selinit();
2450 run();
2451 return 0;
2452 }
2453