Xinqi Bao's Git

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