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