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a2564f8c38c50ed271cf6e4f815f53a1fb460717
[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 };
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 struct timeval lastdraw;
207 } XWindow;
208
209 typedef struct {
210 KeySym k;
211 uint mask;
212 char s[ESC_BUF_SIZ];
213 } Key;
214
215
216 /* TODO: use better name for vars... */
217 typedef struct {
218 int mode;
219 int bx, by;
220 int ex, ey;
221 struct {int x, y;} b, e;
222 char *clip;
223 Atom xtarget;
224 bool alt;
225 struct timeval tclick1;
226 struct timeval tclick2;
227 } Selection;
228
229 #include "config.h"
230
231 /* Drawing Context */
232 typedef struct {
233 ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
234 GC gc;
235 struct {
236 int ascent;
237 int descent;
238 short lbearing;
239 short rbearing;
240 XFontSet set;
241 } font, bfont;
242 } DC;
243
244 static void die(const char*, ...);
245 static void draw(void);
246 static void redraw(void);
247 static void drawregion(int, int, int, int);
248 static void execsh(void);
249 static void sigchld(int);
250 static void run(void);
251 static bool last_draw_too_old(void);
252
253 static void csidump(void);
254 static void csihandle(void);
255 static void csiparse(void);
256 static void csireset(void);
257 static void strdump(void);
258 static void strhandle(void);
259 static void strparse(void);
260 static void strreset(void);
261
262 static void tclearregion(int, int, int, int);
263 static void tcursor(int);
264 static void tdeletechar(int);
265 static void tdeleteline(int);
266 static void tinsertblank(int);
267 static void tinsertblankline(int);
268 static void tmoveto(int, int);
269 static void tnew(int, int);
270 static void tnewline(int);
271 static void tputtab(bool);
272 static void tputc(char*);
273 static void treset(void);
274 static int tresize(int, int);
275 static void tscrollup(int, int);
276 static void tscrolldown(int, int);
277 static void tsetattr(int*, int);
278 static void tsetchar(char*);
279 static void tsetscroll(int, int);
280 static void tswapscreen(void);
281 static void tsetdirt(int, int);
282 static void tsetmode(bool, bool, int *, int);
283 static void tfulldirt(void);
284
285 static void ttynew(void);
286 static void ttyread(void);
287 static void ttyresize(int, int);
288 static void ttywrite(const char *, size_t);
289
290 static void xdraws(char *, Glyph, int, int, int, int);
291 static void xhints(void);
292 static void xclear(int, int, int, int);
293 static void xcopy();
294 static void xdrawcursor(void);
295 static void xinit(void);
296 static void xloadcols(void);
297 static void xseturgency(int);
298 static void xsetsel(char*);
299 static void xresize(int, int);
300
301 static void expose(XEvent *);
302 static void visibility(XEvent *);
303 static void unmap(XEvent *);
304 static char* kmap(KeySym, uint);
305 static void kpress(XEvent *);
306 static void cmessage(XEvent *);
307 static void resize(XEvent *);
308 static void focus(XEvent *);
309 static void brelease(XEvent *);
310 static void bpress(XEvent *);
311 static void bmotion(XEvent *);
312 static void selnotify(XEvent *);
313 static void selrequest(XEvent *);
314
315 static void selinit(void);
316 static inline bool selected(int, int);
317 static void selcopy(void);
318 static void selpaste();
319 static void selscroll(int, int);
320
321 static int utf8decode(char *, long *);
322 static int utf8encode(long *, char *);
323 static int utf8size(char *);
324 static int isfullutf8(char *, int);
325
326 static void (*handler[LASTEvent])(XEvent *) = {
327 [KeyPress] = kpress,
328 [ClientMessage] = cmessage,
329 [ConfigureNotify] = resize,
330 [VisibilityNotify] = visibility,
331 [UnmapNotify] = unmap,
332 [Expose] = expose,
333 [FocusIn] = focus,
334 [FocusOut] = focus,
335 [MotionNotify] = bmotion,
336 [ButtonPress] = bpress,
337 [ButtonRelease] = brelease,
338 [SelectionNotify] = selnotify,
339 [SelectionRequest] = selrequest,
340 };
341
342 /* Globals */
343 static DC dc;
344 static XWindow xw;
345 static Term term;
346 static CSIEscape csiescseq;
347 static STREscape strescseq;
348 static int cmdfd;
349 static pid_t pid;
350 static Selection sel;
351 static FILE *fileio;
352 static char **opt_cmd = NULL;
353 static char *opt_io = NULL;
354 static char *opt_title = NULL;
355 static char *opt_embed = NULL;
356 static char *opt_class = NULL;
357
358 int
359 utf8decode(char *s, long *u) {
360 uchar c;
361 int i, n, rtn;
362
363 rtn = 1;
364 c = *s;
365 if(~c & B7) { /* 0xxxxxxx */
366 *u = c;
367 return rtn;
368 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
369 *u = c&(B4|B3|B2|B1|B0);
370 n = 1;
371 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
372 *u = c&(B3|B2|B1|B0);
373 n = 2;
374 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
375 *u = c & (B2|B1|B0);
376 n = 3;
377 } else
378 goto invalid;
379 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
380 c = *s;
381 if((c & (B7|B6)) != B7) /* 10xxxxxx */
382 goto invalid;
383 *u <<= 6;
384 *u |= c & (B5|B4|B3|B2|B1|B0);
385 }
386 if((n == 1 && *u < 0x80) ||
387 (n == 2 && *u < 0x800) ||
388 (n == 3 && *u < 0x10000) ||
389 (*u >= 0xD800 && *u <= 0xDFFF))
390 goto invalid;
391 return rtn;
392 invalid:
393 *u = 0xFFFD;
394 return rtn;
395 }
396
397 int
398 utf8encode(long *u, char *s) {
399 uchar *sp;
400 ulong uc;
401 int i, n;
402
403 sp = (uchar*) s;
404 uc = *u;
405 if(uc < 0x80) {
406 *sp = uc; /* 0xxxxxxx */
407 return 1;
408 } else if(*u < 0x800) {
409 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
410 n = 1;
411 } else if(uc < 0x10000) {
412 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
413 n = 2;
414 } else if(uc <= 0x10FFFF) {
415 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
416 n = 3;
417 } else {
418 goto invalid;
419 }
420 for(i=n,++sp; i>0; --i,++sp)
421 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
422 return n+1;
423 invalid:
424 /* U+FFFD */
425 *s++ = '\xEF';
426 *s++ = '\xBF';
427 *s = '\xBD';
428 return 3;
429 }
430
431 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
432 UTF-8 otherwise return 0 */
433 int
434 isfullutf8(char *s, int b) {
435 uchar *c1, *c2, *c3;
436
437 c1 = (uchar *) s;
438 c2 = (uchar *) ++s;
439 c3 = (uchar *) ++s;
440 if(b < 1)
441 return 0;
442 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
443 return 0;
444 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
445 ((b == 1) ||
446 ((b == 2) && (*c2&(B7|B6)) == B7)))
447 return 0;
448 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
449 ((b == 1) ||
450 ((b == 2) && (*c2&(B7|B6)) == B7) ||
451 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
452 return 0;
453 else
454 return 1;
455 }
456
457 int
458 utf8size(char *s) {
459 uchar c = *s;
460
461 if(~c&B7)
462 return 1;
463 else if((c&(B7|B6|B5)) == (B7|B6))
464 return 2;
465 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
466 return 3;
467 else
468 return 4;
469 }
470
471 void
472 selinit(void) {
473 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
474 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
475 sel.mode = 0;
476 sel.bx = -1;
477 sel.clip = NULL;
478 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
479 if(sel.xtarget == None)
480 sel.xtarget = XA_STRING;
481 }
482
483 static inline bool
484 selected(int x, int y) {
485 if(sel.ey == y && sel.by == y) {
486 int bx = MIN(sel.bx, sel.ex);
487 int ex = MAX(sel.bx, sel.ex);
488 return BETWEEN(x, bx, ex);
489 }
490 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
491 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
492 }
493
494 void
495 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
496 if(b)
497 *b = e->xbutton.button;
498
499 *x = X2COL(e->xbutton.x);
500 *y = Y2ROW(e->xbutton.y);
501 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
502 sel.b.y = MIN(sel.by, sel.ey);
503 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
504 sel.e.y = MAX(sel.by, sel.ey);
505 }
506
507 void
508 mousereport(XEvent *e) {
509 int x = X2COL(e->xbutton.x);
510 int y = Y2ROW(e->xbutton.y);
511 int button = e->xbutton.button;
512 int state = e->xbutton.state;
513 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
514 static int ob, ox, oy;
515
516 /* from urxvt */
517 if(e->xbutton.type == MotionNotify) {
518 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
519 return;
520 button = ob + 32;
521 ox = x, oy = y;
522 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
523 button = 3;
524 } else {
525 button -= Button1;
526 if(button >= 3)
527 button += 64 - 3;
528 if(e->xbutton.type == ButtonPress) {
529 ob = button;
530 ox = x, oy = y;
531 }
532 }
533
534 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
535 + (state & Mod4Mask ? 8 : 0)
536 + (state & ControlMask ? 16 : 0);
537
538 ttywrite(buf, sizeof(buf));
539 }
540
541 void
542 bpress(XEvent *e) {
543 if(IS_SET(MODE_MOUSE))
544 mousereport(e);
545 else if(e->xbutton.button == Button1) {
546 if(sel.bx != -1)
547 tsetdirt(sel.b.y, sel.e.y);
548 sel.mode = 1;
549 sel.ex = sel.bx = X2COL(e->xbutton.x);
550 sel.ey = sel.by = Y2ROW(e->xbutton.y);
551 }
552 }
553
554 void
555 selcopy(void) {
556 char *str, *ptr;
557 int x, y, bufsize, is_selected = 0;
558
559 if(sel.bx == -1)
560 str = NULL;
561
562 else {
563 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
564 ptr = str = malloc(bufsize);
565
566 /* append every set & selected glyph to the selection */
567 for(y = 0; y < term.row; y++) {
568 for(x = 0; x < term.col; x++) {
569 is_selected = selected(x, y);
570 if((term.line[y][x].state & GLYPH_SET) && is_selected) {
571 int size = utf8size(term.line[y][x].c);
572 memcpy(ptr, term.line[y][x].c, size);
573 ptr += size;
574 }
575 }
576
577 /* \n at the end of every selected line except for the last one */
578 if(is_selected && y < sel.e.y)
579 *ptr++ = '\n';
580 }
581 *ptr = 0;
582 }
583 sel.alt = IS_SET(MODE_ALTSCREEN);
584 xsetsel(str);
585 }
586
587 void
588 selnotify(XEvent *e) {
589 ulong nitems, ofs, rem;
590 int format;
591 uchar *data;
592 Atom type;
593
594 ofs = 0;
595 do {
596 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
597 False, AnyPropertyType, &type, &format,
598 &nitems, &rem, &data)) {
599 fprintf(stderr, "Clipboard allocation failed\n");
600 return;
601 }
602 ttywrite((const char *) data, nitems * format / 8);
603 XFree(data);
604 /* number of 32-bit chunks returned */
605 ofs += nitems * format / 32;
606 } while(rem > 0);
607 }
608
609 void
610 selpaste() {
611 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
612 }
613
614 void
615 selrequest(XEvent *e) {
616 XSelectionRequestEvent *xsre;
617 XSelectionEvent xev;
618 Atom xa_targets;
619
620 xsre = (XSelectionRequestEvent *) e;
621 xev.type = SelectionNotify;
622 xev.requestor = xsre->requestor;
623 xev.selection = xsre->selection;
624 xev.target = xsre->target;
625 xev.time = xsre->time;
626 /* reject */
627 xev.property = None;
628
629 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
630 if(xsre->target == xa_targets) {
631 /* respond with the supported type */
632 Atom string = sel.xtarget;
633 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
634 XA_ATOM, 32, PropModeReplace,
635 (uchar *) &string, 1);
636 xev.property = xsre->property;
637 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
638 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
639 xsre->target, 8, PropModeReplace,
640 (uchar *) sel.clip, strlen(sel.clip));
641 xev.property = xsre->property;
642 }
643
644 /* all done, send a notification to the listener */
645 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
646 fprintf(stderr, "Error sending SelectionNotify event\n");
647 }
648
649 void
650 xsetsel(char *str) {
651 /* register the selection for both the clipboard and the primary */
652 Atom clipboard;
653
654 free(sel.clip);
655 sel.clip = str;
656
657 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
658
659 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
660 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
661
662 XFlush(xw.dpy);
663 }
664
665 void
666 brelease(XEvent *e) {
667 if(IS_SET(MODE_MOUSE)) {
668 mousereport(e);
669 return;
670 }
671 if(e->xbutton.button == Button2)
672 selpaste();
673 else if(e->xbutton.button == Button1) {
674 sel.mode = 0;
675 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
676 term.dirty[sel.ey] = 1;
677 if(sel.bx == sel.ex && sel.by == sel.ey) {
678 struct timeval now;
679 sel.bx = -1;
680 gettimeofday(&now, NULL);
681
682 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
683 /* triple click on the line */
684 sel.b.x = sel.bx = 0;
685 sel.e.x = sel.ex = term.col;
686 sel.b.y = sel.e.y = sel.ey;
687 selcopy();
688 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
689 /* double click to select word */
690 sel.bx = sel.ex;
691 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
692 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
693 sel.b.x = sel.bx;
694 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
695 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
696 sel.e.x = sel.ex;
697 sel.b.y = sel.e.y = sel.ey;
698 selcopy();
699 }
700 } else
701 selcopy();
702 }
703 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
704 gettimeofday(&sel.tclick1, NULL);
705 draw();
706 }
707
708 void
709 bmotion(XEvent *e) {
710 if(IS_SET(MODE_MOUSE)) {
711 mousereport(e);
712 return;
713 }
714 if(sel.mode) {
715 int oldey = sel.ey, oldex = sel.ex;
716 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
717
718 if(oldey != sel.ey || oldex != sel.ex) {
719 int starty = MIN(oldey, sel.ey);
720 int endy = MAX(oldey, sel.ey);
721 tsetdirt(starty, endy);
722 draw();
723 }
724 }
725 }
726
727 void
728 die(const char *errstr, ...) {
729 va_list ap;
730
731 va_start(ap, errstr);
732 vfprintf(stderr, errstr, ap);
733 va_end(ap);
734 exit(EXIT_FAILURE);
735 }
736
737 void
738 execsh(void) {
739 char **args;
740 char *envshell = getenv("SHELL");
741
742 DEFAULT(envshell, SHELL);
743 putenv("TERM="TNAME);
744 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
745 execvp(args[0], args);
746 exit(EXIT_FAILURE);
747 }
748
749 void
750 sigchld(int a) {
751 int stat = 0;
752 if(waitpid(pid, &stat, 0) < 0)
753 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
754 if(WIFEXITED(stat))
755 exit(WEXITSTATUS(stat));
756 else
757 exit(EXIT_FAILURE);
758 }
759
760 void
761 ttynew(void) {
762 int m, s;
763
764 /* seems to work fine on linux, openbsd and freebsd */
765 struct winsize w = {term.row, term.col, 0, 0};
766 if(openpty(&m, &s, NULL, NULL, &w) < 0)
767 die("openpty failed: %s\n", SERRNO);
768
769 switch(pid = fork()) {
770 case -1:
771 die("fork failed\n");
772 break;
773 case 0:
774 setsid(); /* create a new process group */
775 dup2(s, STDIN_FILENO);
776 dup2(s, STDOUT_FILENO);
777 dup2(s, STDERR_FILENO);
778 if(ioctl(s, TIOCSCTTY, NULL) < 0)
779 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
780 close(s);
781 close(m);
782 execsh();
783 break;
784 default:
785 close(s);
786 cmdfd = m;
787 signal(SIGCHLD, sigchld);
788 if(opt_io && !(fileio = fopen(opt_io, "w"))) {
789 fprintf(stderr, "Error opening %s:%s\n",
790 opt_io, strerror(errno));
791 }
792 }
793 }
794
795 void
796 dump(char c) {
797 static int col;
798 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
799 if(++col % 10 == 0)
800 fprintf(stderr, "\n");
801 }
802
803 void
804 ttyread(void) {
805 static char buf[BUFSIZ];
806 static int buflen = 0;
807 char *ptr;
808 char s[UTF_SIZ];
809 int charsize; /* size of utf8 char in bytes */
810 long utf8c;
811 int ret;
812
813 /* append read bytes to unprocessed bytes */
814 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
815 die("Couldn't read from shell: %s\n", SERRNO);
816
817 /* process every complete utf8 char */
818 buflen += ret;
819 ptr = buf;
820 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
821 charsize = utf8decode(ptr, &utf8c);
822 utf8encode(&utf8c, s);
823 tputc(s);
824 ptr += charsize;
825 buflen -= charsize;
826 }
827
828 /* keep any uncomplete utf8 char for the next call */
829 memmove(buf, ptr, buflen);
830 }
831
832 void
833 ttywrite(const char *s, size_t n) {
834 if(write(cmdfd, s, n) == -1)
835 die("write error on tty: %s\n", SERRNO);
836 }
837
838 void
839 ttyresize(int x, int y) {
840 struct winsize w;
841
842 w.ws_row = term.row;
843 w.ws_col = term.col;
844 w.ws_xpixel = xw.w;
845 w.ws_ypixel = xw.h;
846 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
847 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
848 }
849
850 void
851 tsetdirt(int top, int bot)
852 {
853 int i;
854
855 LIMIT(top, 0, term.row-1);
856 LIMIT(bot, 0, term.row-1);
857
858 for(i = top; i <= bot; i++)
859 term.dirty[i] = 1;
860 }
861
862 void
863 tfulldirt(void)
864 {
865 tsetdirt(0, term.row-1);
866 }
867
868 void
869 tcursor(int mode) {
870 static TCursor c;
871
872 if(mode == CURSOR_SAVE)
873 c = term.c;
874 else if(mode == CURSOR_LOAD)
875 term.c = c, tmoveto(c.x, c.y);
876 }
877
878 void
879 treset(void) {
880 unsigned i;
881 term.c = (TCursor){{
882 .mode = ATTR_NULL,
883 .fg = DefaultFG,
884 .bg = DefaultBG
885 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
886
887 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
888 for(i = TAB; i < term.col; i += TAB)
889 term.tabs[i] = 1;
890 term.top = 0, term.bot = term.row - 1;
891 term.mode = MODE_WRAP;
892 tclearregion(0, 0, term.col-1, term.row-1);
893 }
894
895 void
896 tnew(int col, int row) {
897 /* set screen size */
898 term.row = row, term.col = col;
899 term.line = malloc(term.row * sizeof(Line));
900 term.alt = malloc(term.row * sizeof(Line));
901 term.dirty = malloc(term.row * sizeof(*term.dirty));
902 term.tabs = malloc(term.col * sizeof(*term.tabs));
903
904 for(row = 0; row < term.row; row++) {
905 term.line[row] = malloc(term.col * sizeof(Glyph));
906 term.alt [row] = malloc(term.col * sizeof(Glyph));
907 term.dirty[row] = 0;
908 }
909 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
910 /* setup screen */
911 treset();
912 }
913
914 void
915 tswapscreen(void) {
916 Line* tmp = term.line;
917 term.line = term.alt;
918 term.alt = tmp;
919 term.mode ^= MODE_ALTSCREEN;
920 tfulldirt();
921 }
922
923 void
924 tscrolldown(int orig, int n) {
925 int i;
926 Line temp;
927
928 LIMIT(n, 0, term.bot-orig+1);
929
930 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
931
932 for(i = term.bot; i >= orig+n; i--) {
933 temp = term.line[i];
934 term.line[i] = term.line[i-n];
935 term.line[i-n] = temp;
936
937 term.dirty[i] = 1;
938 term.dirty[i-n] = 1;
939 }
940
941 selscroll(orig, n);
942 }
943
944 void
945 tscrollup(int orig, int n) {
946 int i;
947 Line temp;
948 LIMIT(n, 0, term.bot-orig+1);
949
950 tclearregion(0, orig, term.col-1, orig+n-1);
951
952 for(i = orig; i <= term.bot-n; i++) {
953 temp = term.line[i];
954 term.line[i] = term.line[i+n];
955 term.line[i+n] = temp;
956
957 term.dirty[i] = 1;
958 term.dirty[i+n] = 1;
959 }
960
961 selscroll(orig, -n);
962 }
963
964 void
965 selscroll(int orig, int n) {
966 if(sel.bx == -1)
967 return;
968
969 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
970 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
971 sel.bx = -1;
972 return;
973 }
974 if(sel.by < term.top) {
975 sel.by = term.top;
976 sel.bx = 0;
977 }
978 if(sel.ey > term.bot) {
979 sel.ey = term.bot;
980 sel.ex = term.col;
981 }
982 sel.b.y = sel.by, sel.b.x = sel.bx;
983 sel.e.y = sel.ey, sel.e.x = sel.ex;
984 }
985 }
986
987 void
988 tnewline(int first_col) {
989 int y = term.c.y;
990 if(y == term.bot)
991 tscrollup(term.top, 1);
992 else
993 y++;
994 tmoveto(first_col ? 0 : term.c.x, y);
995 }
996
997 void
998 csiparse(void) {
999 /* int noarg = 1; */
1000 char *p = csiescseq.buf;
1001
1002 csiescseq.narg = 0;
1003 if(*p == '?')
1004 csiescseq.priv = 1, p++;
1005
1006 while(p < csiescseq.buf+csiescseq.len) {
1007 while(isdigit(*p)) {
1008 csiescseq.arg[csiescseq.narg] *= 10;
1009 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1010 }
1011 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1012 csiescseq.narg++, p++;
1013 else {
1014 csiescseq.mode = *p;
1015 csiescseq.narg++;
1016 return;
1017 }
1018 }
1019 }
1020
1021 void
1022 tmoveto(int x, int y) {
1023 LIMIT(x, 0, term.col-1);
1024 LIMIT(y, 0, term.row-1);
1025 term.c.state &= ~CURSOR_WRAPNEXT;
1026 term.c.x = x;
1027 term.c.y = y;
1028 }
1029
1030 void
1031 tsetchar(char *c) {
1032 term.dirty[term.c.y] = 1;
1033 term.line[term.c.y][term.c.x] = term.c.attr;
1034 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1035 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1036 }
1037
1038 void
1039 tclearregion(int x1, int y1, int x2, int y2) {
1040 int x, y, temp;
1041
1042 if(x1 > x2)
1043 temp = x1, x1 = x2, x2 = temp;
1044 if(y1 > y2)
1045 temp = y1, y1 = y2, y2 = temp;
1046
1047 LIMIT(x1, 0, term.col-1);
1048 LIMIT(x2, 0, term.col-1);
1049 LIMIT(y1, 0, term.row-1);
1050 LIMIT(y2, 0, term.row-1);
1051
1052 for(y = y1; y <= y2; y++) {
1053 term.dirty[y] = 1;
1054 for(x = x1; x <= x2; x++)
1055 term.line[y][x].state = 0;
1056 }
1057 }
1058
1059 void
1060 tdeletechar(int n) {
1061 int src = term.c.x + n;
1062 int dst = term.c.x;
1063 int size = term.col - src;
1064
1065 term.dirty[term.c.y] = 1;
1066
1067 if(src >= term.col) {
1068 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1069 return;
1070 }
1071 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1072 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1073 }
1074
1075 void
1076 tinsertblank(int n) {
1077 int src = term.c.x;
1078 int dst = src + n;
1079 int size = term.col - dst;
1080
1081 term.dirty[term.c.y] = 1;
1082
1083 if(dst >= term.col) {
1084 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1085 return;
1086 }
1087 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1088 tclearregion(src, term.c.y, dst - 1, term.c.y);
1089 }
1090
1091 void
1092 tinsertblankline(int n) {
1093 if(term.c.y < term.top || term.c.y > term.bot)
1094 return;
1095
1096 tscrolldown(term.c.y, n);
1097 }
1098
1099 void
1100 tdeleteline(int n) {
1101 if(term.c.y < term.top || term.c.y > term.bot)
1102 return;
1103
1104 tscrollup(term.c.y, n);
1105 }
1106
1107 void
1108 tsetattr(int *attr, int l) {
1109 int i;
1110
1111 for(i = 0; i < l; i++) {
1112 switch(attr[i]) {
1113 case 0:
1114 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
1115 term.c.attr.fg = DefaultFG;
1116 term.c.attr.bg = DefaultBG;
1117 break;
1118 case 1:
1119 term.c.attr.mode |= ATTR_BOLD;
1120 break;
1121 case 3: /* enter standout (highlight) mode TODO: make it italic */
1122 term.c.attr.mode |= ATTR_REVERSE;
1123 break;
1124 case 4:
1125 term.c.attr.mode |= ATTR_UNDERLINE;
1126 break;
1127 case 7:
1128 term.c.attr.mode |= ATTR_REVERSE;
1129 break;
1130 case 22:
1131 term.c.attr.mode &= ~ATTR_BOLD;
1132 break;
1133 case 23: /* leave standout (highlight) mode TODO: make it italic */
1134 term.c.attr.mode &= ~ATTR_REVERSE;
1135 break;
1136 case 24:
1137 term.c.attr.mode &= ~ATTR_UNDERLINE;
1138 break;
1139 case 27:
1140 term.c.attr.mode &= ~ATTR_REVERSE;
1141 break;
1142 case 38:
1143 if(i + 2 < l && attr[i + 1] == 5) {
1144 i += 2;
1145 if(BETWEEN(attr[i], 0, 255))
1146 term.c.attr.fg = attr[i];
1147 else
1148 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1149 }
1150 else
1151 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1152 break;
1153 case 39:
1154 term.c.attr.fg = DefaultFG;
1155 break;
1156 case 48:
1157 if(i + 2 < l && attr[i + 1] == 5) {
1158 i += 2;
1159 if(BETWEEN(attr[i], 0, 255))
1160 term.c.attr.bg = attr[i];
1161 else
1162 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1163 }
1164 else
1165 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1166 break;
1167 case 49:
1168 term.c.attr.bg = DefaultBG;
1169 break;
1170 default:
1171 if(BETWEEN(attr[i], 30, 37))
1172 term.c.attr.fg = attr[i] - 30;
1173 else if(BETWEEN(attr[i], 40, 47))
1174 term.c.attr.bg = attr[i] - 40;
1175 else if(BETWEEN(attr[i], 90, 97))
1176 term.c.attr.fg = attr[i] - 90 + 8;
1177 else if(BETWEEN(attr[i], 100, 107))
1178 term.c.attr.fg = attr[i] - 100 + 8;
1179 else
1180 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1181 break;
1182 }
1183 }
1184 }
1185
1186 void
1187 tsetscroll(int t, int b) {
1188 int temp;
1189
1190 LIMIT(t, 0, term.row-1);
1191 LIMIT(b, 0, term.row-1);
1192 if(t > b) {
1193 temp = t;
1194 t = b;
1195 b = temp;
1196 }
1197 term.top = t;
1198 term.bot = b;
1199 }
1200
1201 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1202
1203 void
1204 tsetmode(bool priv, bool set, int *args, int narg) {
1205 int *lim, mode;
1206
1207 for(lim = args + narg; args < lim; ++args) {
1208 if(priv) {
1209 switch(*args) {
1210 case 1:
1211 MODBIT(term.mode, set, MODE_APPKEYPAD);
1212 break;
1213 case 5: /* DECSCNM -- Reverve video */
1214 mode = term.mode;
1215 MODBIT(term.mode,set, MODE_REVERSE);
1216 if(mode != term.mode)
1217 redraw();
1218 break;
1219 case 7:
1220 MODBIT(term.mode, set, MODE_WRAP);
1221 break;
1222 case 20:
1223 MODBIT(term.mode, set, MODE_CRLF);
1224 break;
1225 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1226 break;
1227 case 25:
1228 MODBIT(term.c.state, !set, CURSOR_HIDE);
1229 break;
1230 case 1000: /* 1000,1002: enable xterm mouse report */
1231 MODBIT(term.mode, set, MODE_MOUSEBTN);
1232 break;
1233 case 1002:
1234 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1235 break;
1236 case 1049: /* = 1047 and 1048 */
1237 case 47:
1238 case 1047:
1239 if(IS_SET(MODE_ALTSCREEN))
1240 tclearregion(0, 0, term.col-1, term.row-1);
1241 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1242 (!set && IS_SET(MODE_ALTSCREEN))) {
1243 tswapscreen();
1244 }
1245 if(*args != 1049)
1246 break;
1247 /* pass through */
1248 case 1048:
1249 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1250 break;
1251 default:
1252 fprintf(stderr,
1253 "erresc: unknown private set/reset mode %d\n",
1254 *args);
1255 break;
1256 }
1257 } else {
1258 switch(*args) {
1259 case 4:
1260 MODBIT(term.mode, set, MODE_INSERT);
1261 break;
1262 default:
1263 fprintf(stderr,
1264 "erresc: unknown set/reset mode %d\n",
1265 *args);
1266 break;
1267 }
1268 }
1269 }
1270 }
1271 #undef MODBIT
1272
1273
1274 void
1275 csihandle(void) {
1276 switch(csiescseq.mode) {
1277 default:
1278 unknown:
1279 fprintf(stderr, "erresc: unknown csi ");
1280 csidump();
1281 /* die(""); */
1282 break;
1283 case '@': /* ICH -- Insert <n> blank char */
1284 DEFAULT(csiescseq.arg[0], 1);
1285 tinsertblank(csiescseq.arg[0]);
1286 break;
1287 case 'A': /* CUU -- Cursor <n> Up */
1288 case 'e':
1289 DEFAULT(csiescseq.arg[0], 1);
1290 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1291 break;
1292 case 'B': /* CUD -- Cursor <n> Down */
1293 DEFAULT(csiescseq.arg[0], 1);
1294 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1295 break;
1296 case 'C': /* CUF -- Cursor <n> Forward */
1297 case 'a':
1298 DEFAULT(csiescseq.arg[0], 1);
1299 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1300 break;
1301 case 'D': /* CUB -- Cursor <n> Backward */
1302 DEFAULT(csiescseq.arg[0], 1);
1303 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1304 break;
1305 case 'E': /* CNL -- Cursor <n> Down and first col */
1306 DEFAULT(csiescseq.arg[0], 1);
1307 tmoveto(0, term.c.y+csiescseq.arg[0]);
1308 break;
1309 case 'F': /* CPL -- Cursor <n> Up and first col */
1310 DEFAULT(csiescseq.arg[0], 1);
1311 tmoveto(0, term.c.y-csiescseq.arg[0]);
1312 break;
1313 case 'g': /* TBC -- Tabulation clear */
1314 switch (csiescseq.arg[0]) {
1315 case 0: /* clear current tab stop */
1316 term.tabs[term.c.x] = 0;
1317 break;
1318 case 3: /* clear all the tabs */
1319 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1320 break;
1321 default:
1322 goto unknown;
1323 }
1324 break;
1325 case 'G': /* CHA -- Move to <col> */
1326 case '`': /* HPA */
1327 DEFAULT(csiescseq.arg[0], 1);
1328 tmoveto(csiescseq.arg[0]-1, term.c.y);
1329 break;
1330 case 'H': /* CUP -- Move to <row> <col> */
1331 case 'f': /* HVP */
1332 DEFAULT(csiescseq.arg[0], 1);
1333 DEFAULT(csiescseq.arg[1], 1);
1334 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1335 break;
1336 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1337 DEFAULT(csiescseq.arg[0], 1);
1338 while(csiescseq.arg[0]--)
1339 tputtab(1);
1340 break;
1341 case 'J': /* ED -- Clear screen */
1342 sel.bx = -1;
1343 switch(csiescseq.arg[0]) {
1344 case 0: /* below */
1345 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1346 if(term.c.y < term.row-1)
1347 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1348 break;
1349 case 1: /* above */
1350 if(term.c.y > 1)
1351 tclearregion(0, 0, term.col-1, term.c.y-1);
1352 tclearregion(0, term.c.y, term.c.x, term.c.y);
1353 break;
1354 case 2: /* all */
1355 tclearregion(0, 0, term.col-1, term.row-1);
1356 break;
1357 default:
1358 goto unknown;
1359 }
1360 break;
1361 case 'K': /* EL -- Clear line */
1362 switch(csiescseq.arg[0]) {
1363 case 0: /* right */
1364 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1365 break;
1366 case 1: /* left */
1367 tclearregion(0, term.c.y, term.c.x, term.c.y);
1368 break;
1369 case 2: /* all */
1370 tclearregion(0, term.c.y, term.col-1, term.c.y);
1371 break;
1372 }
1373 break;
1374 case 'S': /* SU -- Scroll <n> line up */
1375 DEFAULT(csiescseq.arg[0], 1);
1376 tscrollup(term.top, csiescseq.arg[0]);
1377 break;
1378 case 'T': /* SD -- Scroll <n> line down */
1379 DEFAULT(csiescseq.arg[0], 1);
1380 tscrolldown(term.top, csiescseq.arg[0]);
1381 break;
1382 case 'L': /* IL -- Insert <n> blank lines */
1383 DEFAULT(csiescseq.arg[0], 1);
1384 tinsertblankline(csiescseq.arg[0]);
1385 break;
1386 case 'l': /* RM -- Reset Mode */
1387 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1388 break;
1389 case 'M': /* DL -- Delete <n> lines */
1390 DEFAULT(csiescseq.arg[0], 1);
1391 tdeleteline(csiescseq.arg[0]);
1392 break;
1393 case 'X': /* ECH -- Erase <n> char */
1394 DEFAULT(csiescseq.arg[0], 1);
1395 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1396 break;
1397 case 'P': /* DCH -- Delete <n> char */
1398 DEFAULT(csiescseq.arg[0], 1);
1399 tdeletechar(csiescseq.arg[0]);
1400 break;
1401 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1402 DEFAULT(csiescseq.arg[0], 1);
1403 while(csiescseq.arg[0]--)
1404 tputtab(0);
1405 break;
1406 case 'd': /* VPA -- Move to <row> */
1407 DEFAULT(csiescseq.arg[0], 1);
1408 tmoveto(term.c.x, csiescseq.arg[0]-1);
1409 break;
1410 case 'h': /* SM -- Set terminal mode */
1411 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1412 break;
1413 case 'm': /* SGR -- Terminal attribute (color) */
1414 tsetattr(csiescseq.arg, csiescseq.narg);
1415 break;
1416 case 'r': /* DECSTBM -- Set Scrolling Region */
1417 if(csiescseq.priv)
1418 goto unknown;
1419 else {
1420 DEFAULT(csiescseq.arg[0], 1);
1421 DEFAULT(csiescseq.arg[1], term.row);
1422 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1423 tmoveto(0, 0);
1424 }
1425 break;
1426 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1427 tcursor(CURSOR_SAVE);
1428 break;
1429 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1430 tcursor(CURSOR_LOAD);
1431 break;
1432 }
1433 }
1434
1435 void
1436 csidump(void) {
1437 int i;
1438 printf("ESC[");
1439 for(i = 0; i < csiescseq.len; i++) {
1440 uint c = csiescseq.buf[i] & 0xff;
1441 if(isprint(c)) putchar(c);
1442 else if(c == '\n') printf("(\\n)");
1443 else if(c == '\r') printf("(\\r)");
1444 else if(c == 0x1b) printf("(\\e)");
1445 else printf("(%02x)", c);
1446 }
1447 putchar('\n');
1448 }
1449
1450 void
1451 csireset(void) {
1452 memset(&csiescseq, 0, sizeof(csiescseq));
1453 }
1454
1455 void
1456 strhandle(void) {
1457 char *p;
1458
1459 /*
1460 * TODO: make this being useful in case of color palette change.
1461 */
1462 strparse();
1463
1464 p = strescseq.buf;
1465
1466 switch(strescseq.type) {
1467 case ']': /* OSC -- Operating System Command */
1468 switch(p[0]) {
1469 case '0':
1470 case '1':
1471 case '2':
1472 /*
1473 * TODO: Handle special chars in string, like umlauts.
1474 */
1475 if(p[1] == ';') {
1476 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1477 }
1478 break;
1479 case ';':
1480 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1481 break;
1482 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1483 break;
1484 default:
1485 fprintf(stderr, "erresc: unknown str ");
1486 strdump();
1487 break;
1488 }
1489 break;
1490 case 'P': /* DSC -- Device Control String */
1491 case '_': /* APC -- Application Program Command */
1492 case '^': /* PM -- Privacy Message */
1493 default:
1494 fprintf(stderr, "erresc: unknown str ");
1495 strdump();
1496 /* die(""); */
1497 break;
1498 }
1499 }
1500
1501 void
1502 strparse(void) {
1503 /*
1504 * TODO: Implement parsing like for CSI when required.
1505 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1506 */
1507 return;
1508 }
1509
1510 void
1511 strdump(void) {
1512 int i;
1513 printf("ESC%c", strescseq.type);
1514 for(i = 0; i < strescseq.len; i++) {
1515 uint c = strescseq.buf[i] & 0xff;
1516 if(isprint(c)) putchar(c);
1517 else if(c == '\n') printf("(\\n)");
1518 else if(c == '\r') printf("(\\r)");
1519 else if(c == 0x1b) printf("(\\e)");
1520 else printf("(%02x)", c);
1521 }
1522 printf("ESC\\\n");
1523 }
1524
1525 void
1526 strreset(void) {
1527 memset(&strescseq, 0, sizeof(strescseq));
1528 }
1529
1530 void
1531 tputtab(bool forward) {
1532 unsigned x = term.c.x;
1533
1534 if(forward) {
1535 if(x == term.col)
1536 return;
1537 for(++x; x < term.col && !term.tabs[x]; ++x)
1538 /* nothing */ ;
1539 } else {
1540 if(x == 0)
1541 return;
1542 for(--x; x > 0 && !term.tabs[x]; --x)
1543 /* nothing */ ;
1544 }
1545 tmoveto(x, term.c.y);
1546 }
1547
1548 void
1549 tputc(char *c) {
1550 char ascii = *c;
1551
1552 if(fileio)
1553 putc(ascii, fileio);
1554
1555 if(term.esc & ESC_START) {
1556 if(term.esc & ESC_CSI) {
1557 csiescseq.buf[csiescseq.len++] = ascii;
1558 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1559 term.esc = 0;
1560 csiparse(), csihandle();
1561 }
1562 } else if(term.esc & ESC_STR) {
1563 switch(ascii) {
1564 case '\033':
1565 term.esc = ESC_START | ESC_STR_END;
1566 break;
1567 case '\a': /* backwards compatibility to xterm */
1568 term.esc = 0;
1569 strhandle();
1570 break;
1571 default:
1572 strescseq.buf[strescseq.len++] = ascii;
1573 if(strescseq.len+1 >= STR_BUF_SIZ) {
1574 term.esc = 0;
1575 strhandle();
1576 }
1577 }
1578 } else if(term.esc & ESC_STR_END) {
1579 term.esc = 0;
1580 if(ascii == '\\')
1581 strhandle();
1582 } else if(term.esc & ESC_ALTCHARSET) {
1583 switch(ascii) {
1584 case '0': /* Line drawing crap */
1585 term.c.attr.mode |= ATTR_GFX;
1586 break;
1587 case 'B': /* Back to regular text */
1588 term.c.attr.mode &= ~ATTR_GFX;
1589 break;
1590 default:
1591 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1592 }
1593 term.esc = 0;
1594 } else {
1595 switch(ascii) {
1596 case '[':
1597 term.esc |= ESC_CSI;
1598 break;
1599 case 'P': /* DCS -- Device Control String */
1600 case '_': /* APC -- Application Program Command */
1601 case '^': /* PM -- Privacy Message */
1602 case ']': /* OSC -- Operating System Command */
1603 strreset();
1604 strescseq.type = ascii;
1605 term.esc |= ESC_STR;
1606 break;
1607 case '(':
1608 term.esc |= ESC_ALTCHARSET;
1609 break;
1610 case 'D': /* IND -- Linefeed */
1611 if(term.c.y == term.bot)
1612 tscrollup(term.top, 1);
1613 else
1614 tmoveto(term.c.x, term.c.y+1);
1615 term.esc = 0;
1616 break;
1617 case 'E': /* NEL -- Next line */
1618 tnewline(1); /* always go to first col */
1619 term.esc = 0;
1620 break;
1621 case 'H': /* HTS -- Horizontal tab stop */
1622 term.tabs[term.c.x] = 1;
1623 term.esc = 0;
1624 break;
1625 case 'M': /* RI -- Reverse index */
1626 if(term.c.y == term.top)
1627 tscrolldown(term.top, 1);
1628 else
1629 tmoveto(term.c.x, term.c.y-1);
1630 term.esc = 0;
1631 break;
1632 case 'c': /* RIS -- Reset to inital state */
1633 treset();
1634 term.esc = 0;
1635 break;
1636 case '=': /* DECPAM -- Application keypad */
1637 term.mode |= MODE_APPKEYPAD;
1638 term.esc = 0;
1639 break;
1640 case '>': /* DECPNM -- Normal keypad */
1641 term.mode &= ~MODE_APPKEYPAD;
1642 term.esc = 0;
1643 break;
1644 case '7': /* DECSC -- Save Cursor */
1645 tcursor(CURSOR_SAVE);
1646 term.esc = 0;
1647 break;
1648 case '8': /* DECRC -- Restore Cursor */
1649 tcursor(CURSOR_LOAD);
1650 term.esc = 0;
1651 break;
1652 case '\\': /* ST -- Stop */
1653 term.esc = 0;
1654 break;
1655 default:
1656 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1657 (uchar) ascii, isprint(ascii)?ascii:'.');
1658 term.esc = 0;
1659 }
1660 }
1661 } else {
1662 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1663 sel.bx = -1;
1664 switch(ascii) {
1665 case '\t':
1666 tputtab(1);
1667 break;
1668 case '\b':
1669 tmoveto(term.c.x-1, term.c.y);
1670 break;
1671 case '\r':
1672 tmoveto(0, term.c.y);
1673 break;
1674 case '\f':
1675 case '\v':
1676 case '\n':
1677 /* go to first col if the mode is set */
1678 tnewline(IS_SET(MODE_CRLF));
1679 break;
1680 case '\a':
1681 if(!(xw.state & WIN_FOCUSED))
1682 xseturgency(1);
1683 break;
1684 case '\033':
1685 csireset();
1686 term.esc = ESC_START;
1687 break;
1688 default:
1689 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1690 tnewline(1); /* always go to first col */
1691 tsetchar(c);
1692 if(term.c.x+1 < term.col)
1693 tmoveto(term.c.x+1, term.c.y);
1694 else
1695 term.c.state |= CURSOR_WRAPNEXT;
1696 }
1697 }
1698 }
1699
1700 int
1701 tresize(int col, int row) {
1702 int i, x;
1703 int minrow = MIN(row, term.row);
1704 int mincol = MIN(col, term.col);
1705 int slide = term.c.y - row + 1;
1706
1707 if(col < 1 || row < 1)
1708 return 0;
1709
1710 /* free unneeded rows */
1711 i = 0;
1712 if(slide > 0) {
1713 /* slide screen to keep cursor where we expect it -
1714 * tscrollup would work here, but we can optimize to
1715 * memmove because we're freeing the earlier lines */
1716 for(/* i = 0 */; i < slide; i++) {
1717 free(term.line[i]);
1718 free(term.alt[i]);
1719 }
1720 memmove(term.line, term.line + slide, row * sizeof(Line));
1721 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1722 }
1723 for(i += row; i < term.row; i++) {
1724 free(term.line[i]);
1725 free(term.alt[i]);
1726 }
1727
1728 /* resize to new height */
1729 term.line = realloc(term.line, row * sizeof(Line));
1730 term.alt = realloc(term.alt, row * sizeof(Line));
1731 term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
1732 term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
1733
1734 /* resize each row to new width, zero-pad if needed */
1735 for(i = 0; i < minrow; i++) {
1736 term.dirty[i] = 1;
1737 term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
1738 term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
1739 for(x = mincol; x < col; x++) {
1740 term.line[i][x].state = 0;
1741 term.alt[i][x].state = 0;
1742 }
1743 }
1744
1745 /* allocate any new rows */
1746 for(/* i == minrow */; i < row; i++) {
1747 term.dirty[i] = 1;
1748 term.line[i] = calloc(col, sizeof(Glyph));
1749 term.alt [i] = calloc(col, sizeof(Glyph));
1750 }
1751 if(col > term.col) {
1752 bool *bp = term.tabs + term.col;
1753
1754 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1755 while(--bp > term.tabs && !*bp)
1756 /* nothing */ ;
1757 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1758 *bp = 1;
1759 }
1760 /* update terminal size */
1761 term.col = col, term.row = row;
1762 /* make use of the LIMIT in tmoveto */
1763 tmoveto(term.c.x, term.c.y);
1764 /* reset scrolling region */
1765 tsetscroll(0, row-1);
1766
1767 return (slide > 0);
1768 }
1769
1770 void
1771 xresize(int col, int row) {
1772 xw.w = MAX(1, 2*BORDER + col * xw.cw);
1773 xw.h = MAX(1, 2*BORDER + row * xw.ch);
1774 }
1775
1776 void
1777 xloadcols(void) {
1778 int i, r, g, b;
1779 XColor color;
1780 ulong white = WhitePixel(xw.dpy, xw.scr);
1781
1782 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1783 for(i = 0; i < LEN(colorname); i++) {
1784 if(!colorname[i])
1785 continue;
1786 if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
1787 dc.col[i] = white;
1788 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1789 } else
1790 dc.col[i] = color.pixel;
1791 }
1792
1793 /* load colors [16-255] ; same colors as xterm */
1794 for(i = 16, r = 0; r < 6; r++)
1795 for(g = 0; g < 6; g++)
1796 for(b = 0; b < 6; b++) {
1797 color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1798 color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1799 color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1800 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1801 dc.col[i] = white;
1802 fprintf(stderr, "Could not allocate color %d\n", i);
1803 } else
1804 dc.col[i] = color.pixel;
1805 i++;
1806 }
1807
1808 for(r = 0; r < 24; r++, i++) {
1809 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
1810 if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
1811 dc.col[i] = white;
1812 fprintf(stderr, "Could not allocate color %d\n", i);
1813 } else
1814 dc.col[i] = color.pixel;
1815 }
1816 }
1817
1818 void
1819 xclear(int x1, int y1, int x2, int y2) {
1820 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1821 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1822 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1823 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1824 }
1825
1826 void
1827 xhints(void) {
1828 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1829 XWMHints wm = {.flags = InputHint, .input = 1};
1830 XSizeHints *sizeh = NULL;
1831
1832 sizeh = XAllocSizeHints();
1833 if(xw.isfixed == False) {
1834 sizeh->flags = PSize | PResizeInc | PBaseSize;
1835 sizeh->height = xw.h;
1836 sizeh->width = xw.w;
1837 sizeh->height_inc = xw.ch;
1838 sizeh->width_inc = xw.cw;
1839 sizeh->base_height = 2*BORDER;
1840 sizeh->base_width = 2*BORDER;
1841 } else {
1842 sizeh->flags = PMaxSize | PMinSize;
1843 sizeh->min_width = sizeh->max_width = xw.fw;
1844 sizeh->min_height = sizeh->max_height = xw.fh;
1845 }
1846
1847 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1848 XFree(sizeh);
1849 }
1850
1851 XFontSet
1852 xinitfont(char *fontstr) {
1853 XFontSet set;
1854 char *def, **missing;
1855 int n;
1856
1857 missing = NULL;
1858 set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
1859 if(missing) {
1860 while(n--)
1861 fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
1862 XFreeStringList(missing);
1863 }
1864 return set;
1865 }
1866
1867 void
1868 xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
1869 XFontStruct **xfonts;
1870 char **font_names;
1871 int i, n;
1872
1873 *ascent = *descent = *lbearing = *rbearing = 0;
1874 n = XFontsOfFontSet(set, &xfonts, &font_names);
1875 for(i = 0; i < n; i++) {
1876 *ascent = MAX(*ascent, (*xfonts)->ascent);
1877 *descent = MAX(*descent, (*xfonts)->descent);
1878 *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
1879 *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
1880 xfonts++;
1881 }
1882 }
1883
1884 void
1885 initfonts(char *fontstr, char *bfontstr) {
1886 if((dc.font.set = xinitfont(fontstr)) == NULL ||
1887 (dc.bfont.set = xinitfont(bfontstr)) == NULL)
1888 die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
1889 xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
1890 &dc.font.lbearing, &dc.font.rbearing);
1891 xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
1892 &dc.bfont.lbearing, &dc.bfont.rbearing);
1893 }
1894
1895 void
1896 xinit(void) {
1897 XSetWindowAttributes attrs;
1898 Cursor cursor;
1899 Window parent;
1900 int sw, sh;
1901
1902 if(!(xw.dpy = XOpenDisplay(NULL)))
1903 die("Can't open display\n");
1904 xw.scr = XDefaultScreen(xw.dpy);
1905
1906 /* adjust fixed window geometry */
1907 if(xw.isfixed) {
1908 sw = DisplayWidth(xw.dpy, xw.scr);
1909 sh = DisplayHeight(xw.dpy, xw.scr);
1910 if(xw.fx < 0)
1911 xw.fx = sw + xw.fx - xw.fw - 1;
1912 if(xw.fy < 0)
1913 xw.fy = sh + xw.fy - xw.fh - 1;
1914
1915 xw.h = xw.fh;
1916 xw.w = xw.fw;
1917 } else {
1918 /* window - default size */
1919 xw.h = 2*BORDER + term.row * xw.ch;
1920 xw.w = 2*BORDER + term.col * xw.cw;
1921 xw.fx = 0;
1922 xw.fy = 0;
1923 }
1924
1925 /* font */
1926 initfonts(FONT, BOLDFONT);
1927
1928 /* XXX: Assuming same size for bold font */
1929 xw.cw = dc.font.rbearing - dc.font.lbearing;
1930 xw.ch = dc.font.ascent + dc.font.descent;
1931
1932 /* colors */
1933 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1934 xloadcols();
1935
1936 attrs.background_pixel = dc.col[DefaultBG];
1937 attrs.border_pixel = dc.col[DefaultBG];
1938 attrs.bit_gravity = NorthWestGravity;
1939 attrs.event_mask = FocusChangeMask | KeyPressMask
1940 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1941 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
1942 | EnterWindowMask | LeaveWindowMask;
1943 attrs.colormap = xw.cmap;
1944
1945 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
1946 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
1947 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
1948 XDefaultVisual(xw.dpy, xw.scr),
1949 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
1950 | CWColormap,
1951 &attrs);
1952 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
1953
1954
1955 /* input methods */
1956 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
1957 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
1958 | XIMStatusNothing, XNClientWindow, xw.win,
1959 XNFocusWindow, xw.win, NULL);
1960 /* gc */
1961 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
1962
1963 /* white cursor, black outline */
1964 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
1965 XDefineCursor(xw.dpy, xw.win, cursor);
1966 XRecolorCursor(xw.dpy, cursor,
1967 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
1968 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
1969
1970 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
1971
1972 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
1973 XMapWindow(xw.dpy, xw.win);
1974 xhints();
1975 XSync(xw.dpy, 0);
1976 }
1977
1978 void
1979 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
1980 int fg = base.fg, bg = base.bg, temp;
1981 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
1982 XFontSet fontset = dc.font.set;
1983 int i;
1984
1985 /* only switch default fg/bg if term is in RV mode */
1986 if(IS_SET(MODE_REVERSE)) {
1987 if(fg == DefaultFG)
1988 fg = DefaultBG;
1989 if(bg == DefaultBG)
1990 bg = DefaultFG;
1991 }
1992
1993 if(base.mode & ATTR_REVERSE)
1994 temp = fg, fg = bg, bg = temp;
1995
1996 if(base.mode & ATTR_BOLD) {
1997 fg += 8;
1998 fontset = dc.bfont.set;
1999 }
2000
2001 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2002 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2003
2004 if(base.mode & ATTR_GFX) {
2005 for(i = 0; i < bytelen; i++) {
2006 char c = gfx[(uint)s[i] % 256];
2007 if(c)
2008 s[i] = c;
2009 else if(s[i] > 0x5f)
2010 s[i] -= 0x5f;
2011 }
2012 }
2013
2014 XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
2015
2016 if(base.mode & ATTR_UNDERLINE)
2017 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2018 }
2019
2020 /* copy buffer pixmap to screen pixmap */
2021 void
2022 xcopy() {
2023 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2024 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2025
2026 }
2027
2028 void
2029 xdrawcursor(void) {
2030 static int oldx = 0;
2031 static int oldy = 0;
2032 int sl;
2033 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2034
2035 LIMIT(oldx, 0, term.col-1);
2036 LIMIT(oldy, 0, term.row-1);
2037
2038 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2039 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2040
2041 /* remove the old cursor */
2042 if(term.line[oldy][oldx].state & GLYPH_SET) {
2043 sl = utf8size(term.line[oldy][oldx].c);
2044 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2045 } else
2046 xclear(oldx, oldy, oldx, oldy);
2047
2048 xcopy(oldx, oldy, 1, 1);
2049
2050 /* draw the new one */
2051 if(!(term.c.state & CURSOR_HIDE)) {
2052 if(!(xw.state & WIN_FOCUSED))
2053 g.bg = DefaultUCS;
2054
2055 if(IS_SET(MODE_REVERSE))
2056 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2057
2058 sl = utf8size(g.c);
2059 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2060 oldx = term.c.x, oldy = term.c.y;
2061 }
2062
2063 xcopy(term.c.x, term.c.y, 1, 1);
2064 }
2065
2066 void
2067 redraw(void) {
2068 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2069 tfulldirt();
2070 draw();
2071 nanosleep(&tv, NULL);
2072 }
2073
2074 void
2075 draw() {
2076 drawregion(0, 0, term.col, term.row);
2077 xcopy();
2078 gettimeofday(&xw.lastdraw, NULL);
2079 }
2080
2081 void
2082 drawregion(int x1, int y1, int x2, int y2) {
2083 int ic, ib, x, y, ox, sl;
2084 Glyph base, new;
2085 char buf[DRAW_BUF_SIZ];
2086 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2087
2088 if((sel.alt && !alt) || (!sel.alt && alt))
2089 ena_sel = 0;
2090 if(!(xw.state & WIN_VISIBLE))
2091 return;
2092
2093 for(y = y1; y < y2; y++) {
2094 if(!term.dirty[y])
2095 continue;
2096 xclear(0, y, term.col, y);
2097 term.dirty[y] = 0;
2098 base = term.line[y][0];
2099 ic = ib = ox = 0;
2100 for(x = x1; x < x2; x++) {
2101 new = term.line[y][x];
2102 if(ena_sel && *(new.c) && selected(x, y))
2103 new.mode ^= ATTR_REVERSE;
2104 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2105 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2106 xdraws(buf, base, ox, y, ic, ib);
2107 ic = ib = 0;
2108 }
2109 if(new.state & GLYPH_SET) {
2110 if(ib == 0) {
2111 ox = x;
2112 base = new;
2113 }
2114 sl = utf8size(new.c);
2115 memcpy(buf+ib, new.c, sl);
2116 ib += sl;
2117 ++ic;
2118 }
2119 }
2120 if(ib > 0)
2121 xdraws(buf, base, ox, y, ic, ib);
2122 }
2123 xdrawcursor();
2124 }
2125
2126 void
2127 expose(XEvent *ev) {
2128 XExposeEvent *e = &ev->xexpose;
2129 if(xw.state & WIN_REDRAW) {
2130 if(!e->count)
2131 xw.state &= ~WIN_REDRAW;
2132 }
2133 xcopy();
2134 }
2135
2136 void
2137 visibility(XEvent *ev) {
2138 XVisibilityEvent *e = &ev->xvisibility;
2139 if(e->state == VisibilityFullyObscured)
2140 xw.state &= ~WIN_VISIBLE;
2141 else if(!(xw.state & WIN_VISIBLE))
2142 /* need a full redraw for next Expose, not just a buf copy */
2143 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2144 }
2145
2146 void
2147 unmap(XEvent *ev) {
2148 xw.state &= ~WIN_VISIBLE;
2149 }
2150
2151 void
2152 xseturgency(int add) {
2153 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2154 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2155 XSetWMHints(xw.dpy, xw.win, h);
2156 XFree(h);
2157 }
2158
2159 void
2160 focus(XEvent *ev) {
2161 if(ev->type == FocusIn) {
2162 xw.state |= WIN_FOCUSED;
2163 xseturgency(0);
2164 } else
2165 xw.state &= ~WIN_FOCUSED;
2166 draw();
2167 }
2168
2169 char*
2170 kmap(KeySym k, uint state) {
2171 int i;
2172 state &= ~Mod2Mask;
2173 for(i = 0; i < LEN(key); i++) {
2174 uint mask = key[i].mask;
2175 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2176 return (char*)key[i].s;
2177 }
2178 return NULL;
2179 }
2180
2181 void
2182 kpress(XEvent *ev) {
2183 XKeyEvent *e = &ev->xkey;
2184 KeySym ksym;
2185 char buf[32];
2186 char *customkey;
2187 int len;
2188 int meta;
2189 int shift;
2190 Status status;
2191
2192 meta = e->state & Mod1Mask;
2193 shift = e->state & ShiftMask;
2194 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2195
2196 /* 1. custom keys from config.h */
2197 if((customkey = kmap(ksym, e->state)))
2198 ttywrite(customkey, strlen(customkey));
2199 /* 2. hardcoded (overrides X lookup) */
2200 else
2201 switch(ksym) {
2202 case XK_Up:
2203 case XK_Down:
2204 case XK_Left:
2205 case XK_Right:
2206 /* XXX: shift up/down doesn't work */
2207 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2208 ttywrite(buf, 3);
2209 break;
2210 case XK_Insert:
2211 if(shift)
2212 selpaste();
2213 break;
2214 case XK_Return:
2215 if(IS_SET(MODE_CRLF))
2216 ttywrite("\r\n", 2);
2217 else
2218 ttywrite("\r", 1);
2219 break;
2220 /* 3. X lookup */
2221 default:
2222 if(len > 0) {
2223 if(meta && len == 1)
2224 ttywrite("\033", 1);
2225 ttywrite(buf, len);
2226 }
2227 break;
2228 }
2229 }
2230
2231 void
2232 cmessage(XEvent *e) {
2233 /* See xembed specs
2234 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2235 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2236 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2237 xw.state |= WIN_FOCUSED;
2238 xseturgency(0);
2239 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2240 xw.state &= ~WIN_FOCUSED;
2241 }
2242 draw();
2243 }
2244 }
2245
2246 void
2247 resize(XEvent *e) {
2248 int col, row;
2249
2250 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2251 return;
2252
2253 xw.w = e->xconfigure.width;
2254 xw.h = e->xconfigure.height;
2255 col = (xw.w - 2*BORDER) / xw.cw;
2256 row = (xw.h - 2*BORDER) / xw.ch;
2257 if(col == term.col && row == term.row)
2258 return;
2259 if(tresize(col, row))
2260 draw();
2261 xresize(col, row);
2262 ttyresize(col, row);
2263 }
2264
2265 bool
2266 last_draw_too_old(void) {
2267 struct timeval now;
2268 gettimeofday(&now, NULL);
2269 return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
2270 }
2271
2272 void
2273 run(void) {
2274 XEvent ev;
2275 fd_set rfd;
2276 int xfd = XConnectionNumber(xw.dpy);
2277 struct timeval timeout = {0};
2278 bool stuff_to_print = 0;
2279
2280 for(;;) {
2281 FD_ZERO(&rfd);
2282 FD_SET(cmdfd, &rfd);
2283 FD_SET(xfd, &rfd);
2284 timeout.tv_sec = 0;
2285 timeout.tv_usec = SELECT_TIMEOUT;
2286 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
2287 if(errno == EINTR)
2288 continue;
2289 die("select failed: %s\n", SERRNO);
2290 }
2291 if(FD_ISSET(cmdfd, &rfd)) {
2292 ttyread();
2293 stuff_to_print = 1;
2294 }
2295
2296 if(stuff_to_print && last_draw_too_old()) {
2297 stuff_to_print = 0;
2298 draw();
2299 }
2300
2301 while(XPending(xw.dpy)) {
2302 XNextEvent(xw.dpy, &ev);
2303 if(XFilterEvent(&ev, xw.win))
2304 continue;
2305 if(handler[ev.type])
2306 (handler[ev.type])(&ev);
2307 }
2308 }
2309 }
2310
2311 int
2312 main(int argc, char *argv[]) {
2313 int i, bitm, xr, yr;
2314 unsigned int wr, hr;
2315
2316 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2317 xw.isfixed = False;
2318
2319 for(i = 1; i < argc; i++) {
2320 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2321 case 't':
2322 if(++i < argc) opt_title = argv[i];
2323 break;
2324 case 'c':
2325 if(++i < argc) opt_class = argv[i];
2326 break;
2327 case 'w':
2328 if(++i < argc) opt_embed = argv[i];
2329 break;
2330 case 'f':
2331 if(++i < argc) opt_io = argv[i];
2332 break;
2333 case 'e':
2334 /* eat every remaining arguments */
2335 if(++i < argc) opt_cmd = &argv[i];
2336 goto run;
2337 case 'g':
2338 if(++i >= argc)
2339 break;
2340
2341 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2342 if(bitm & XValue)
2343 xw.fx = xr;
2344 if(bitm & YValue)
2345 xw.fy = yr;
2346 if(bitm & WidthValue)
2347 xw.fw = (int)wr;
2348 if(bitm & HeightValue)
2349 xw.fh = (int)hr;
2350 if(bitm & XNegative && xw.fx == 0)
2351 xw.fx = -1;
2352 if(bitm & XNegative && xw.fy == 0)
2353 xw.fy = -1;
2354
2355 if(xw.fh != 0 && xw.fw != 0)
2356 xw.isfixed = True;
2357 break;
2358 case 'v':
2359 default:
2360 die(USAGE);
2361 }
2362 }
2363
2364 run:
2365 setlocale(LC_CTYPE, "");
2366 tnew(80, 24);
2367 ttynew();
2368 xinit();
2369 selinit();
2370 run();
2371 return 0;
2372 }
2373