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Preliminary solution to the stuttering problem.
[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
328 static void (*handler[LASTEvent])(XEvent *) = {
329 [KeyPress] = kpress,
330 [ClientMessage] = cmessage,
331 [ConfigureNotify] = resize,
332 [VisibilityNotify] = visibility,
333 [UnmapNotify] = unmap,
334 [Expose] = expose,
335 [FocusIn] = focus,
336 [FocusOut] = focus,
337 [MotionNotify] = bmotion,
338 [ButtonPress] = bpress,
339 [ButtonRelease] = brelease,
340 [SelectionClear] = selclear,
341 [SelectionNotify] = selnotify,
342 [SelectionRequest] = selrequest,
343 };
344
345 /* Globals */
346 static DC dc;
347 static XWindow xw;
348 static Term term;
349 static CSIEscape csiescseq;
350 static STREscape strescseq;
351 static int cmdfd;
352 static pid_t pid;
353 static Selection sel;
354 static int iofd = -1;
355 static char **opt_cmd = NULL;
356 static char *opt_io = NULL;
357 static char *opt_title = NULL;
358 static char *opt_embed = NULL;
359 static char *opt_class = NULL;
360
361 void *
362 xmalloc(size_t len) {
363 void *p = malloc(len);
364 if(!p)
365 die("Out of memory");
366 return p;
367 }
368
369 void *
370 xrealloc(void *p, size_t len) {
371 if((p = realloc(p, len)) == NULL)
372 die("Out of memory");
373 return p;
374 }
375
376 int
377 utf8decode(char *s, long *u) {
378 uchar c;
379 int i, n, rtn;
380
381 rtn = 1;
382 c = *s;
383 if(~c & B7) { /* 0xxxxxxx */
384 *u = c;
385 return rtn;
386 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
387 *u = c&(B4|B3|B2|B1|B0);
388 n = 1;
389 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
390 *u = c&(B3|B2|B1|B0);
391 n = 2;
392 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
393 *u = c & (B2|B1|B0);
394 n = 3;
395 } else
396 goto invalid;
397 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
398 c = *s;
399 if((c & (B7|B6)) != B7) /* 10xxxxxx */
400 goto invalid;
401 *u <<= 6;
402 *u |= c & (B5|B4|B3|B2|B1|B0);
403 }
404 if((n == 1 && *u < 0x80) ||
405 (n == 2 && *u < 0x800) ||
406 (n == 3 && *u < 0x10000) ||
407 (*u >= 0xD800 && *u <= 0xDFFF))
408 goto invalid;
409 return rtn;
410 invalid:
411 *u = 0xFFFD;
412 return rtn;
413 }
414
415 int
416 utf8encode(long *u, char *s) {
417 uchar *sp;
418 ulong uc;
419 int i, n;
420
421 sp = (uchar*) s;
422 uc = *u;
423 if(uc < 0x80) {
424 *sp = uc; /* 0xxxxxxx */
425 return 1;
426 } else if(*u < 0x800) {
427 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
428 n = 1;
429 } else if(uc < 0x10000) {
430 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
431 n = 2;
432 } else if(uc <= 0x10FFFF) {
433 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
434 n = 3;
435 } else {
436 goto invalid;
437 }
438 for(i=n,++sp; i>0; --i,++sp)
439 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
440 return n+1;
441 invalid:
442 /* U+FFFD */
443 *s++ = '\xEF';
444 *s++ = '\xBF';
445 *s = '\xBD';
446 return 3;
447 }
448
449 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
450 UTF-8 otherwise return 0 */
451 int
452 isfullutf8(char *s, int b) {
453 uchar *c1, *c2, *c3;
454
455 c1 = (uchar *) s;
456 c2 = (uchar *) ++s;
457 c3 = (uchar *) ++s;
458 if(b < 1)
459 return 0;
460 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
461 return 0;
462 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
463 ((b == 1) ||
464 ((b == 2) && (*c2&(B7|B6)) == B7)))
465 return 0;
466 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
467 ((b == 1) ||
468 ((b == 2) && (*c2&(B7|B6)) == B7) ||
469 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
470 return 0;
471 else
472 return 1;
473 }
474
475 int
476 utf8size(char *s) {
477 uchar c = *s;
478
479 if(~c&B7)
480 return 1;
481 else if((c&(B7|B6|B5)) == (B7|B6))
482 return 2;
483 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
484 return 3;
485 else
486 return 4;
487 }
488
489 void
490 selinit(void) {
491 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
492 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
493 sel.mode = 0;
494 sel.bx = -1;
495 sel.clip = NULL;
496 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
497 if(sel.xtarget == None)
498 sel.xtarget = XA_STRING;
499 }
500
501 static inline bool
502 selected(int x, int y) {
503 if(sel.ey == y && sel.by == y) {
504 int bx = MIN(sel.bx, sel.ex);
505 int ex = MAX(sel.bx, sel.ex);
506 return BETWEEN(x, bx, ex);
507 }
508 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
509 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
510 }
511
512 void
513 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
514 if(b)
515 *b = e->xbutton.button;
516
517 *x = X2COL(e->xbutton.x);
518 *y = Y2ROW(e->xbutton.y);
519 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
520 sel.b.y = MIN(sel.by, sel.ey);
521 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
522 sel.e.y = MAX(sel.by, sel.ey);
523 }
524
525 void
526 mousereport(XEvent *e) {
527 int x = X2COL(e->xbutton.x);
528 int y = Y2ROW(e->xbutton.y);
529 int button = e->xbutton.button;
530 int state = e->xbutton.state;
531 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
532 static int ob, ox, oy;
533
534 /* from urxvt */
535 if(e->xbutton.type == MotionNotify) {
536 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
537 return;
538 button = ob + 32;
539 ox = x, oy = y;
540 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
541 button = 3;
542 } else {
543 button -= Button1;
544 if(button >= 3)
545 button += 64 - 3;
546 if(e->xbutton.type == ButtonPress) {
547 ob = button;
548 ox = x, oy = y;
549 }
550 }
551
552 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
553 + (state & Mod4Mask ? 8 : 0)
554 + (state & ControlMask ? 16 : 0);
555
556 ttywrite(buf, sizeof(buf));
557 }
558
559 void
560 bpress(XEvent *e) {
561 if(IS_SET(MODE_MOUSE))
562 mousereport(e);
563 else if(e->xbutton.button == Button1) {
564 if(sel.bx != -1) {
565 sel.bx = -1;
566 tsetdirt(sel.b.y, sel.e.y);
567 draw();
568 }
569 sel.mode = 1;
570 sel.ex = sel.bx = X2COL(e->xbutton.x);
571 sel.ey = sel.by = Y2ROW(e->xbutton.y);
572 }
573 }
574
575 void
576 selcopy(void) {
577 char *str, *ptr;
578 int x, y, bufsize, is_selected = 0;
579
580 if(sel.bx == -1)
581 str = NULL;
582
583 else {
584 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
585 ptr = str = xmalloc(bufsize);
586
587 /* append every set & selected glyph to the selection */
588 for(y = 0; y < term.row; y++) {
589 for(x = 0; x < term.col; x++) {
590 is_selected = selected(x, y);
591 if((term.line[y][x].state & GLYPH_SET) && is_selected) {
592 int size = utf8size(term.line[y][x].c);
593 memcpy(ptr, term.line[y][x].c, size);
594 ptr += size;
595 }
596 }
597
598 /* \n at the end of every selected line except for the last one */
599 if(is_selected && y < sel.e.y)
600 *ptr++ = '\n';
601 }
602 *ptr = 0;
603 }
604 sel.alt = IS_SET(MODE_ALTSCREEN);
605 xsetsel(str);
606 }
607
608 void
609 selnotify(XEvent *e) {
610 ulong nitems, ofs, rem;
611 int format;
612 uchar *data;
613 Atom type;
614
615 ofs = 0;
616 do {
617 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
618 False, AnyPropertyType, &type, &format,
619 &nitems, &rem, &data)) {
620 fprintf(stderr, "Clipboard allocation failed\n");
621 return;
622 }
623 ttywrite((const char *) data, nitems * format / 8);
624 XFree(data);
625 /* number of 32-bit chunks returned */
626 ofs += nitems * format / 32;
627 } while(rem > 0);
628 }
629
630 void
631 selpaste() {
632 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
633 }
634
635 void selclear(XEvent *e) {
636 if(sel.bx == -1)
637 return;
638 sel.bx = -1;
639 tsetdirt(sel.b.y, sel.e.y);
640 }
641
642 void
643 selrequest(XEvent *e) {
644 XSelectionRequestEvent *xsre;
645 XSelectionEvent xev;
646 Atom xa_targets;
647
648 xsre = (XSelectionRequestEvent *) e;
649 xev.type = SelectionNotify;
650 xev.requestor = xsre->requestor;
651 xev.selection = xsre->selection;
652 xev.target = xsre->target;
653 xev.time = xsre->time;
654 /* reject */
655 xev.property = None;
656
657 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
658 if(xsre->target == xa_targets) {
659 /* respond with the supported type */
660 Atom string = sel.xtarget;
661 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
662 XA_ATOM, 32, PropModeReplace,
663 (uchar *) &string, 1);
664 xev.property = xsre->property;
665 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
666 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
667 xsre->target, 8, PropModeReplace,
668 (uchar *) sel.clip, strlen(sel.clip));
669 xev.property = xsre->property;
670 }
671
672 /* all done, send a notification to the listener */
673 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
674 fprintf(stderr, "Error sending SelectionNotify event\n");
675 }
676
677 void
678 xsetsel(char *str) {
679 /* register the selection for both the clipboard and the primary */
680 Atom clipboard;
681
682 free(sel.clip);
683 sel.clip = str;
684
685 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
686
687 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
688 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
689 }
690
691 void
692 brelease(XEvent *e) {
693 if(IS_SET(MODE_MOUSE)) {
694 mousereport(e);
695 return;
696 }
697 if(e->xbutton.button == Button2)
698 selpaste();
699 else if(e->xbutton.button == Button1) {
700 sel.mode = 0;
701 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
702 term.dirty[sel.ey] = 1;
703 if(sel.bx == sel.ex && sel.by == sel.ey) {
704 struct timeval now;
705 sel.bx = -1;
706 gettimeofday(&now, NULL);
707
708 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
709 /* triple click on the line */
710 sel.b.x = sel.bx = 0;
711 sel.e.x = sel.ex = term.col;
712 sel.b.y = sel.e.y = sel.ey;
713 selcopy();
714 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
715 /* double click to select word */
716 sel.bx = sel.ex;
717 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
718 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
719 sel.b.x = sel.bx;
720 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
721 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
722 sel.e.x = sel.ex;
723 sel.b.y = sel.e.y = sel.ey;
724 selcopy();
725 }
726 } else
727 selcopy();
728 }
729 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
730 gettimeofday(&sel.tclick1, NULL);
731 }
732
733 void
734 bmotion(XEvent *e) {
735 if(IS_SET(MODE_MOUSE)) {
736 mousereport(e);
737 return;
738 }
739 if(sel.mode) {
740 int oldey = sel.ey, oldex = sel.ex;
741 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
742
743 if(oldey != sel.ey || oldex != sel.ex) {
744 int starty = MIN(oldey, sel.ey);
745 int endy = MAX(oldey, sel.ey);
746 tsetdirt(starty, endy);
747 }
748 }
749 }
750
751 void
752 die(const char *errstr, ...) {
753 va_list ap;
754
755 va_start(ap, errstr);
756 vfprintf(stderr, errstr, ap);
757 va_end(ap);
758 exit(EXIT_FAILURE);
759 }
760
761 void
762 execsh(void) {
763 char **args;
764 char *envshell = getenv("SHELL");
765
766 unsetenv("COLUMNS");
767 unsetenv("LINES");
768 unsetenv("TERMCAP");
769
770 signal(SIGCHLD, SIG_DFL);
771 signal(SIGHUP, SIG_DFL);
772 signal(SIGINT, SIG_DFL);
773 signal(SIGQUIT, SIG_DFL);
774 signal(SIGTERM, SIG_DFL);
775 signal(SIGALRM, SIG_DFL);
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 '\0': /* padding character, do nothing */
1720 break;
1721 case '\t':
1722 tputtab(1);
1723 break;
1724 case '\b':
1725 tmoveto(term.c.x-1, term.c.y);
1726 break;
1727 case '\r':
1728 tmoveto(0, term.c.y);
1729 break;
1730 case '\f':
1731 case '\v':
1732 case '\n':
1733 /* go to first col if the mode is set */
1734 tnewline(IS_SET(MODE_CRLF));
1735 break;
1736 case '\a':
1737 if(!(xw.state & WIN_FOCUSED))
1738 xseturgency(1);
1739 break;
1740 case '\033':
1741 csireset();
1742 term.esc = ESC_START;
1743 break;
1744 default:
1745 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1746 tnewline(1); /* always go to first col */
1747 tsetchar(c);
1748 if(term.c.x+1 < term.col)
1749 tmoveto(term.c.x+1, term.c.y);
1750 else
1751 term.c.state |= CURSOR_WRAPNEXT;
1752 }
1753 }
1754 }
1755
1756 int
1757 tresize(int col, int row) {
1758 int i, x;
1759 int minrow = MIN(row, term.row);
1760 int mincol = MIN(col, term.col);
1761 int slide = term.c.y - row + 1;
1762
1763 if(col < 1 || row < 1)
1764 return 0;
1765
1766 /* free unneeded rows */
1767 i = 0;
1768 if(slide > 0) {
1769 /* slide screen to keep cursor where we expect it -
1770 * tscrollup would work here, but we can optimize to
1771 * memmove because we're freeing the earlier lines */
1772 for(/* i = 0 */; i < slide; i++) {
1773 free(term.line[i]);
1774 free(term.alt[i]);
1775 }
1776 memmove(term.line, term.line + slide, row * sizeof(Line));
1777 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1778 }
1779 for(i += row; i < term.row; i++) {
1780 free(term.line[i]);
1781 free(term.alt[i]);
1782 }
1783
1784 /* resize to new height */
1785 term.line = xrealloc(term.line, row * sizeof(Line));
1786 term.alt = xrealloc(term.alt, row * sizeof(Line));
1787 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
1788 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
1789
1790 /* resize each row to new width, zero-pad if needed */
1791 for(i = 0; i < minrow; i++) {
1792 term.dirty[i] = 1;
1793 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
1794 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
1795 for(x = mincol; x < col; x++) {
1796 term.line[i][x].state = 0;
1797 term.alt[i][x].state = 0;
1798 }
1799 }
1800
1801 /* allocate any new rows */
1802 for(/* i == minrow */; i < row; i++) {
1803 term.dirty[i] = 1;
1804 term.line[i] = calloc(col, sizeof(Glyph));
1805 term.alt [i] = calloc(col, sizeof(Glyph));
1806 }
1807 if(col > term.col) {
1808 bool *bp = term.tabs + term.col;
1809
1810 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1811 while(--bp > term.tabs && !*bp)
1812 /* nothing */ ;
1813 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1814 *bp = 1;
1815 }
1816 /* update terminal size */
1817 term.col = col, term.row = row;
1818 /* make use of the LIMIT in tmoveto */
1819 tmoveto(term.c.x, term.c.y);
1820 /* reset scrolling region */
1821 tsetscroll(0, row-1);
1822
1823 return (slide > 0);
1824 }
1825
1826 void
1827 xresize(int col, int row) {
1828 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1829 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1830 }
1831
1832 void
1833 xloadcols(void) {
1834 int i, r, g, b;
1835 XColor color;
1836 ulong white = WhitePixel(xw.dpy, xw.scr);
1837
1838 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1839 for(i = 0; i < LEN(colorname); i++) {
1840 if(!colorname[i])
1841 continue;
1842 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1843 dc.col[i] = white;
1844 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1845 } else
1846 dc.col[i] = color.pixel;
1847 }
1848
1849 /* load colors [16-255] ; same colors as xterm */
1850 for(i = 16, r = 0; r < 6; r++)
1851 for(g = 0; g < 6; g++)
1852 for(b = 0; b < 6; b++) {
1853 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1854 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1855 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1856 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1857 dc.col[i] = white;
1858 fprintf(stderr, "Could not allocate color %d\n", i);
1859 } else
1860 dc.col[i] = color.pixel;
1861 i++;
1862 }
1863
1864 for(r = 0; r < 24; r++, i++) {
1865 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1866 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1867 dc.col[i] = white;
1868 fprintf(stderr, "Could not allocate color %d\n", i);
1869 } else
1870 dc.col[i] = color.pixel;
1871 }
1872 }
1873
1874 void
1875 xclear(int x1, int y1, int x2, int y2) {
1876 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1877 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1878 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1879 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1880 }
1881
1882 void
1883 xhints(void) {
1884 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1885 XWMHints wm = {.flags = InputHint, .input = 1};
1886 XSizeHints *sizeh = NULL;
1887
1888 sizeh = XAllocSizeHints();
1889 if(xw.isfixed == False) {
1890 sizeh->flags = PSize | PResizeInc | PBaseSize;
1891 sizeh->height = xw.h;
1892 sizeh->width = xw.w;
1893 sizeh->height_inc = xw.ch;
1894 sizeh->width_inc = xw.cw;
1895 sizeh->base_height = 2*BORDER;
1896 sizeh->base_width = 2*BORDER;
1897 } else {
1898 sizeh->flags = PMaxSize | PMinSize;
1899 sizeh->min_width = sizeh->max_width = xw.fw;
1900 sizeh->min_height = sizeh->max_height = xw.fh;
1901 }
1902
1903 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1904 XFree(sizeh);
1905 }
1906
1907 XFontSet
1908 xinitfont(char *fontstr) {
1909 XFontSet set;
1910 char *def, **missing;
1911 int n;
1912
1913 missing = NULL;
1914 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1915 if(missing) {
1916 while(n--)
1917 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1918 XFreeStringList(missing);
1919 }
1920 return set;
1921 }
1922
1923 void
1924 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1925 XFontStruct **xfonts;
1926 char **font_names;
1927 int i, n;
1928
1929 *ascent = *descent = *lbearing = *rbearing = 0;
1930 n = XFontsOfFontSet(set, &xfonts, &font_names);
1931 for(i = 0; i < n; i++) {
1932 *ascent = MAX(*ascent, (*xfonts)->ascent);
1933 *descent = MAX(*descent, (*xfonts)->descent);
1934 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1935 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1936 xfonts++;
1937 }
1938 }
1939
1940 void
1941 initfonts(char *fontstr, char *bfontstr, char *ifontstr, char *ibfontstr) {
1942 if((dc.font.set = xinitfont(fontstr)) == NULL)
1943 die("Can't load font %s\n", fontstr);
1944 if((dc.bfont.set = xinitfont(bfontstr)) == NULL)
1945 die("Can't load bfont %s\n", bfontstr);
1946 if((dc.ifont.set = xinitfont(ifontstr)) == NULL)
1947 die("Can't load ifont %s\n", ifontstr);
1948 if((dc.ibfont.set = xinitfont(ibfontstr)) == NULL)
1949 die("Can't load ibfont %s\n", ibfontstr);
1950
1951 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1952 &dc.font.lbearing, &dc.font.rbearing);
1953 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1954 &dc.bfont.lbearing, &dc.bfont.rbearing);
1955 xgetfontinfo(dc.ifont.set, &dc.ifont.ascent, &dc.ifont.descent,
1956 &dc.ifont.lbearing, &dc.ifont.rbearing);
1957 xgetfontinfo(dc.ibfont.set, &dc.ibfont.ascent, &dc.ibfont.descent,
1958 &dc.ibfont.lbearing, &dc.ibfont.rbearing);
1959 }
1960
1961 void
1962 xinit(void) {
1963 XSetWindowAttributes attrs;
1964 Cursor cursor;
1965 Window parent;
1966 int sw, sh, major, minor;
1967
1968 if(!(xw.dpy = XOpenDisplay(NULL)))
1969 die("Can't open display\n");
1970 xw.scr = XDefaultScreen(xw.dpy);
1971
1972 /* font */
1973 initfonts(FONT, BOLDFONT, ITALICFONT, ITALICBOLDFONT);
1974
1975 /* XXX: Assuming same size for bold font */
1976 xw.cw = dc.font.rbearing - dc.font.lbearing;
1977 xw.ch = dc.font.ascent + dc.font.descent;
1978
1979 /* colors */
1980 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1981 xloadcols();
1982
1983 /* adjust fixed window geometry */
1984 if(xw.isfixed) {
1985 sw = DisplayWidth(xw.dpy, xw.scr);
1986 sh = DisplayHeight(xw.dpy, xw.scr);
1987 if(xw.fx < 0)
1988 xw.fx = sw + xw.fx - xw.fw - 1;
1989 if(xw.fy < 0)
1990 xw.fy = sh + xw.fy - xw.fh - 1;
1991
1992 xw.h = xw.fh;
1993 xw.w = xw.fw;
1994 } else {
1995 /* window - default size */
1996 xw.h = 2*BORDER + term.row * xw.ch;
1997 xw.w = 2*BORDER + term.col * xw.cw;
1998 xw.fx = 0;
1999 xw.fy = 0;
2000 }
2001
2002 attrs.background_pixel = dc.col[DefaultBG];
2003 attrs.border_pixel = dc.col[DefaultBG];
2004 attrs.bit_gravity = NorthWestGravity;
2005 attrs.event_mask = FocusChangeMask | KeyPressMask
2006 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
2007 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2008 attrs.colormap = xw.cmap;
2009
2010 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2011 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2012 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2013 XDefaultVisual(xw.dpy, xw.scr),
2014 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2015 | CWColormap,
2016 &attrs);
2017 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2018 die("Xdbe extension is not present\n");
2019 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2020
2021 /* input methods */
2022 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2023 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2024 | XIMStatusNothing, XNClientWindow, xw.win,
2025 XNFocusWindow, xw.win, NULL);
2026 /* gc */
2027 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2028
2029 /* white cursor, black outline */
2030 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2031 XDefineCursor(xw.dpy, xw.win, cursor);
2032 XRecolorCursor(xw.dpy, cursor,
2033 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2034 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2035
2036 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2037
2038 xresettitle();
2039 XMapWindow(xw.dpy, xw.win);
2040 xhints();
2041 XSync(xw.dpy, 0);
2042 }
2043
2044 void
2045 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2046 int fg = base.fg, bg = base.bg, temp;
2047 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
2048 XFontSet fontset = dc.font.set;
2049 int i;
2050
2051 /* only switch default fg/bg if term is in RV mode */
2052 if(IS_SET(MODE_REVERSE)) {
2053 if(fg == DefaultFG)
2054 fg = DefaultBG;
2055 if(bg == DefaultBG)
2056 bg = DefaultFG;
2057 }
2058
2059 if(base.mode & ATTR_REVERSE)
2060 temp = fg, fg = bg, bg = temp;
2061
2062 if(base.mode & ATTR_BOLD) {
2063 fg += 8;
2064 fontset = dc.bfont.set;
2065 }
2066
2067 if(base.mode & ATTR_ITALIC)
2068 fontset = dc.ifont.set;
2069 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2070 fontset = dc.ibfont.set;
2071
2072 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2073 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2074
2075 if(base.mode & ATTR_GFX) {
2076 for(i = 0; i < bytelen; i++) {
2077 char c = gfx[(uint)s[i] % 256];
2078 if(c)
2079 s[i] = c;
2080 else if(s[i] > 0x5f)
2081 s[i] -= 0x5f;
2082 }
2083 }
2084
2085 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
2086
2087 if(base.mode & ATTR_UNDERLINE)
2088 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2089 }
2090
2091 void
2092 xdrawcursor(void) {
2093 static int oldx = 0;
2094 static int oldy = 0;
2095 int sl;
2096 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2097
2098 LIMIT(oldx, 0, term.col-1);
2099 LIMIT(oldy, 0, term.row-1);
2100
2101 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2102 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2103
2104 /* remove the old cursor */
2105 if(term.line[oldy][oldx].state & GLYPH_SET) {
2106 sl = utf8size(term.line[oldy][oldx].c);
2107 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2108 } else
2109 xclear(oldx, oldy, oldx, oldy);
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
2125 void
2126 xresettitle(void) {
2127 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2128 }
2129
2130 void
2131 redraw(void) {
2132 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2133 tfulldirt();
2134 draw();
2135 XSync(xw.dpy, False); /* necessary for a good tput flash */
2136 nanosleep(&tv, NULL);
2137 }
2138
2139 void
2140 draw() {
2141 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2142
2143 drawregion(0, 0, term.col, term.row);
2144 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
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 }
2200
2201 void
2202 visibility(XEvent *ev) {
2203 XVisibilityEvent *e = &ev->xvisibility;
2204 if(e->state == VisibilityFullyObscured)
2205 xw.state &= ~WIN_VISIBLE;
2206 else if(!(xw.state & WIN_VISIBLE))
2207 /* need a full redraw for next Expose, not just a buf copy */
2208 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2209 }
2210
2211 void
2212 unmap(XEvent *ev) {
2213 xw.state &= ~WIN_VISIBLE;
2214 }
2215
2216 void
2217 xseturgency(int add) {
2218 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2219 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2220 XSetWMHints(xw.dpy, xw.win, h);
2221 XFree(h);
2222 }
2223
2224 void
2225 focus(XEvent *ev) {
2226 if(ev->type == FocusIn) {
2227 xw.state |= WIN_FOCUSED;
2228 xseturgency(0);
2229 } else
2230 xw.state &= ~WIN_FOCUSED;
2231 }
2232
2233 char*
2234 kmap(KeySym k, uint state) {
2235 int i;
2236 state &= ~Mod2Mask;
2237 for(i = 0; i < LEN(key); i++) {
2238 uint mask = key[i].mask;
2239 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2240 return (char*)key[i].s;
2241 }
2242 return NULL;
2243 }
2244
2245 void
2246 kpress(XEvent *ev) {
2247 XKeyEvent *e = &ev->xkey;
2248 KeySym ksym;
2249 char buf[32];
2250 char *customkey;
2251 int len;
2252 int meta;
2253 int shift;
2254 Status status;
2255
2256 meta = e->state & Mod1Mask;
2257 shift = e->state & ShiftMask;
2258 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2259
2260 /* 1. custom keys from config.h */
2261 if((customkey = kmap(ksym, e->state)))
2262 ttywrite(customkey, strlen(customkey));
2263 /* 2. hardcoded (overrides X lookup) */
2264 else
2265 switch(ksym) {
2266 case XK_Up:
2267 case XK_Down:
2268 case XK_Left:
2269 case XK_Right:
2270 /* XXX: shift up/down doesn't work */
2271 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2272 ttywrite(buf, 3);
2273 break;
2274 case XK_Insert:
2275 if(shift)
2276 selpaste();
2277 break;
2278 case XK_Return:
2279 if(IS_SET(MODE_CRLF))
2280 ttywrite("\r\n", 2);
2281 else
2282 ttywrite("\r", 1);
2283 break;
2284 /* 3. X lookup */
2285 default:
2286 if(len > 0) {
2287 if(meta && len == 1)
2288 ttywrite("\033", 1);
2289 ttywrite(buf, len);
2290 }
2291 break;
2292 }
2293 }
2294
2295 void
2296 cmessage(XEvent *e) {
2297 /* See xembed specs
2298 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2299 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2300 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2301 xw.state |= WIN_FOCUSED;
2302 xseturgency(0);
2303 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2304 xw.state &= ~WIN_FOCUSED;
2305 }
2306 }
2307 }
2308
2309 void
2310 resize(XEvent *e) {
2311 int col, row;
2312
2313 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2314 return;
2315
2316 xw.w = e->xconfigure.width;
2317 xw.h = e->xconfigure.height;
2318 col = (xw.w - 2*BORDER) / xw.cw;
2319 row = (xw.h - 2*BORDER) / xw.ch;
2320 if(col == term.col && row == term.row)
2321 return;
2322 if(tresize(col, row))
2323 draw();
2324 xresize(col, row);
2325 ttyresize(col, row);
2326 }
2327
2328 void
2329 run(void) {
2330 XEvent ev;
2331 fd_set rfd;
2332 int xfd = XConnectionNumber(xw.dpy), i;
2333 struct timeval drawtimeout;
2334
2335 for(;;) {
2336 FD_ZERO(&rfd);
2337 FD_SET(cmdfd, &rfd);
2338 FD_SET(xfd, &rfd);
2339 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
2340 if(errno == EINTR)
2341 continue;
2342 die("select failed: %s\n", SERRNO);
2343 }
2344
2345 /*
2346 * Stop after a certain number of reads so the user does not
2347 * feel like the system is stuttering.
2348 */
2349 for(i = 0; i < 1000 && FD_ISSET(cmdfd, &rfd); i++) {
2350 ttyread();
2351
2352 FD_ZERO(&rfd);
2353 FD_SET(cmdfd, &rfd);
2354 /*
2355 * Just wait a bit so it isn't disturbing the
2356 * user and the system is able to write something.
2357 */
2358 drawtimeout.tv_sec = 0;
2359 drawtimeout.tv_usec = 5;
2360 if(select(cmdfd+1, &rfd, NULL, NULL, &drawtimeout) < 0) {
2361 if(errno == EINTR)
2362 continue;
2363 die("select failed: %s\n", SERRNO);
2364 }
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 draw();
2376 XFlush(xw.dpy);
2377 }
2378 }
2379
2380 int
2381 main(int argc, char *argv[]) {
2382 int i, bitm, xr, yr;
2383 unsigned int wr, hr;
2384
2385 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2386 xw.isfixed = False;
2387
2388 for(i = 1; i < argc; i++) {
2389 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2390 case 't':
2391 if(++i < argc) opt_title = argv[i];
2392 break;
2393 case 'c':
2394 if(++i < argc) opt_class = argv[i];
2395 break;
2396 case 'w':
2397 if(++i < argc) opt_embed = argv[i];
2398 break;
2399 case 'f':
2400 if(++i < argc) opt_io = argv[i];
2401 break;
2402 case 'e':
2403 /* eat every remaining arguments */
2404 if(++i < argc) opt_cmd = &argv[i];
2405 goto run;
2406 case 'g':
2407 if(++i >= argc)
2408 break;
2409
2410 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2411 if(bitm & XValue)
2412 xw.fx = xr;
2413 if(bitm & YValue)
2414 xw.fy = yr;
2415 if(bitm & WidthValue)
2416 xw.fw = (int)wr;
2417 if(bitm & HeightValue)
2418 xw.fh = (int)hr;
2419 if(bitm & XNegative && xw.fx == 0)
2420 xw.fx = -1;
2421 if(bitm & XNegative && xw.fy == 0)
2422 xw.fy = -1;
2423
2424 if(xw.fh != 0 && xw.fw != 0)
2425 xw.isfixed = True;
2426 break;
2427 case 'v':
2428 default:
2429 die(USAGE);
2430 }
2431 }
2432
2433 run:
2434 setlocale(LC_CTYPE, "");
2435 tnew(80, 24);
2436 ttynew();
2437 xinit();
2438 selinit();
2439 run();
2440 return 0;
2441 }
2442