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