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Initial Xft support for st. More to follow.
[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 #include <X11/Xft/Xft.h>
29 #define Glyph Glyph_
30 #define Font Font_
31
32 #if defined(__linux)
33 #include <pty.h>
34 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
35 #include <util.h>
36 #elif defined(__FreeBSD__) || defined(__DragonFly__)
37 #include <libutil.h>
38 #endif
39
40 #define USAGE \
41 "st " VERSION " (c) 2010-2012 st engineers\n" \
42 "usage: st [-t title] [-c class] [-g geometry]" \
43 " [-w windowid] [-v] [-f file] [-e command...]\n"
44
45 /* XEMBED messages */
46 #define XEMBED_FOCUS_IN 4
47 #define XEMBED_FOCUS_OUT 5
48
49 /* Arbitrary sizes */
50 #define ESC_BUF_SIZ 256
51 #define ESC_ARG_SIZ 16
52 #define STR_BUF_SIZ 256
53 #define STR_ARG_SIZ 16
54 #define DRAW_BUF_SIZ 20*1024
55 #define UTF_SIZ 4
56 #define XK_NO_MOD UINT_MAX
57 #define XK_ANY_MOD 0
58
59 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
60
61 #define SERRNO strerror(errno)
62 #define MIN(a, b) ((a) < (b) ? (a) : (b))
63 #define MAX(a, b) ((a) < (b) ? (b) : (a))
64 #define LEN(a) (sizeof(a) / sizeof(a[0]))
65 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
66 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
67 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
68 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
69 #define IS_SET(flag) (term.mode & (flag))
70 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
71 #define X2COL(x) (((x) - BORDER)/xw.cw)
72 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
73
74 enum glyph_attribute {
75 ATTR_NULL = 0,
76 ATTR_REVERSE = 1,
77 ATTR_UNDERLINE = 2,
78 ATTR_BOLD = 4,
79 ATTR_GFX = 8,
80 ATTR_ITALIC = 16,
81 ATTR_BLINK = 32,
82 };
83
84 enum cursor_movement {
85 CURSOR_UP,
86 CURSOR_DOWN,
87 CURSOR_LEFT,
88 CURSOR_RIGHT,
89 CURSOR_SAVE,
90 CURSOR_LOAD
91 };
92
93 enum cursor_state {
94 CURSOR_DEFAULT = 0,
95 CURSOR_HIDE = 1,
96 CURSOR_WRAPNEXT = 2
97 };
98
99 enum glyph_state {
100 GLYPH_SET = 1,
101 GLYPH_DIRTY = 2
102 };
103
104 enum term_mode {
105 MODE_WRAP = 1,
106 MODE_INSERT = 2,
107 MODE_APPKEYPAD = 4,
108 MODE_ALTSCREEN = 8,
109 MODE_CRLF = 16,
110 MODE_MOUSEBTN = 32,
111 MODE_MOUSEMOTION = 64,
112 MODE_MOUSE = 32|64,
113 MODE_REVERSE = 128
114 };
115
116 enum escape_state {
117 ESC_START = 1,
118 ESC_CSI = 2,
119 ESC_STR = 4, /* DSC, OSC, PM, APC */
120 ESC_ALTCHARSET = 8,
121 ESC_STR_END = 16, /* a final string was encountered */
122 };
123
124 enum window_state {
125 WIN_VISIBLE = 1,
126 WIN_REDRAW = 2,
127 WIN_FOCUSED = 4
128 };
129
130 /* bit macro */
131 #undef B0
132 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
133
134 typedef unsigned char uchar;
135 typedef unsigned int uint;
136 typedef unsigned long ulong;
137 typedef unsigned short ushort;
138
139 typedef struct {
140 char c[UTF_SIZ]; /* character code */
141 uchar mode; /* attribute flags */
142 ushort fg; /* foreground */
143 ushort bg; /* background */
144 uchar state; /* state flags */
145 } Glyph;
146
147 typedef Glyph* Line;
148
149 typedef struct {
150 Glyph attr; /* current char attributes */
151 int x;
152 int y;
153 char state;
154 } TCursor;
155
156 /* CSI Escape sequence structs */
157 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
158 typedef struct {
159 char buf[ESC_BUF_SIZ]; /* raw string */
160 int len; /* raw string length */
161 char priv;
162 int arg[ESC_ARG_SIZ];
163 int narg; /* nb of args */
164 char mode;
165 } CSIEscape;
166
167 /* STR Escape sequence structs */
168 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
169 typedef struct {
170 char type; /* ESC type ... */
171 char buf[STR_BUF_SIZ]; /* raw string */
172 int len; /* raw string length */
173 char *args[STR_ARG_SIZ];
174 int narg; /* nb of args */
175 } STREscape;
176
177 /* Internal representation of the screen */
178 typedef struct {
179 int row; /* nb row */
180 int col; /* nb col */
181 Line* line; /* screen */
182 Line* alt; /* alternate screen */
183 bool* dirty; /* dirtyness of lines */
184 TCursor c; /* cursor */
185 int top; /* top scroll limit */
186 int bot; /* bottom scroll limit */
187 int mode; /* terminal mode flags */
188 int esc; /* escape state flags */
189 bool *tabs;
190 } Term;
191
192 /* Purely graphic info */
193 typedef struct {
194 Display* dpy;
195 Colormap cmap;
196 Window win;
197 XdbeBackBuffer buf;
198 Atom xembed;
199 XIM xim;
200 XIC xic;
201 XftDraw *xft_draw;
202 Visual *vis;
203 int scr;
204 Bool isfixed; /* is fixed geometry? */
205 int fx, fy, fw, fh; /* fixed geometry */
206 int tw, th; /* tty width and height */
207 int w; /* window width */
208 int h; /* window height */
209 int ch; /* char height */
210 int cw; /* char width */
211 char state; /* focus, redraw, visible */
212 } XWindow;
213
214 typedef struct {
215 KeySym k;
216 uint mask;
217 char s[ESC_BUF_SIZ];
218 } Key;
219
220 /* TODO: use better name for vars... */
221 typedef struct {
222 int mode;
223 int bx, by;
224 int ex, ey;
225 struct {int x, y;} b, e;
226 char *clip;
227 Atom xtarget;
228 bool alt;
229 struct timeval tclick1;
230 struct timeval tclick2;
231 } Selection;
232
233 #include "config.h"
234
235 /* Font structure */
236 typedef struct {
237 int ascent;
238 int descent;
239 short lbearing;
240 short rbearing;
241 XFontSet set;
242 XftFont* xft_set;
243 } Font;
244
245 /* Drawing Context */
246 typedef struct {
247 ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
248 XftColor xft_col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
249 GC gc;
250 Font font, bfont, ifont, ibfont;
251 } DC;
252
253 static void die(const char*, ...);
254 static void draw(void);
255 static void redraw(void);
256 static void drawregion(int, int, int, int);
257 static void execsh(void);
258 static void sigchld(int);
259 static void run(void);
260
261 static void csidump(void);
262 static void csihandle(void);
263 static void csiparse(void);
264 static void csireset(void);
265 static void strdump(void);
266 static void strhandle(void);
267 static void strparse(void);
268 static void strreset(void);
269
270 static void tclearregion(int, int, int, int);
271 static void tcursor(int);
272 static void tdeletechar(int);
273 static void tdeleteline(int);
274 static void tinsertblank(int);
275 static void tinsertblankline(int);
276 static void tmoveto(int, int);
277 static void tnew(int, int);
278 static void tnewline(int);
279 static void tputtab(bool);
280 static void tputc(char*);
281 static void treset(void);
282 static int tresize(int, int);
283 static void tscrollup(int, int);
284 static void tscrolldown(int, int);
285 static void tsetattr(int*, int);
286 static void tsetchar(char*);
287 static void tsetscroll(int, int);
288 static void tswapscreen(void);
289 static void tsetdirt(int, int);
290 static void tsetmode(bool, bool, int *, int);
291 static void tfulldirt(void);
292
293 static void ttynew(void);
294 static void ttyread(void);
295 static void ttyresize(int, int);
296 static void ttywrite(const char *, size_t);
297
298 static void xdraws(char *, Glyph, int, int, int, int);
299 static void xhints(void);
300 static void xclear(int, int, int, int);
301 static void xdrawcursor(void);
302 static void xinit(void);
303 static void xloadcols(void);
304 static void xresettitle(void);
305 static void xseturgency(int);
306 static void xsetsel(char*);
307 static void xresize(int, int);
308
309 static void expose(XEvent *);
310 static void visibility(XEvent *);
311 static void unmap(XEvent *);
312 static char* kmap(KeySym, uint);
313 static void kpress(XEvent *);
314 static void cmessage(XEvent *);
315 static void resize(XEvent *);
316 static void focus(XEvent *);
317 static void brelease(XEvent *);
318 static void bpress(XEvent *);
319 static void bmotion(XEvent *);
320 static void selnotify(XEvent *);
321 static void selclear(XEvent *);
322 static void selrequest(XEvent *);
323
324 static void selinit(void);
325 static inline bool selected(int, int);
326 static void selcopy(void);
327 static void selpaste(void);
328 static void selscroll(int, int);
329
330 static int utf8decode(char *, long *);
331 static int utf8encode(long *, char *);
332 static int utf8size(char *);
333 static int isfullutf8(char *, int);
334
335 static void *xmalloc(size_t);
336 static void *xrealloc(void *, size_t);
337 static void *xcalloc(size_t nmemb, size_t size);
338
339 static void (*handler[LASTEvent])(XEvent *) = {
340 [KeyPress] = kpress,
341 [ClientMessage] = cmessage,
342 [ConfigureNotify] = resize,
343 [VisibilityNotify] = visibility,
344 [UnmapNotify] = unmap,
345 [Expose] = expose,
346 [FocusIn] = focus,
347 [FocusOut] = focus,
348 [MotionNotify] = bmotion,
349 [ButtonPress] = bpress,
350 [ButtonRelease] = brelease,
351 [SelectionClear] = selclear,
352 [SelectionNotify] = selnotify,
353 [SelectionRequest] = selrequest,
354 };
355
356 /* Globals */
357 static DC dc;
358 static XWindow xw;
359 static Term term;
360 static CSIEscape csiescseq;
361 static STREscape strescseq;
362 static int cmdfd;
363 static pid_t pid;
364 static Selection sel;
365 static int iofd = -1;
366 static char **opt_cmd = NULL;
367 static char *opt_io = NULL;
368 static char *opt_title = NULL;
369 static char *opt_embed = NULL;
370 static char *opt_class = NULL;
371
372 void *
373 xmalloc(size_t len) {
374 void *p = malloc(len);
375 if(!p)
376 die("Out of memory\n");
377 return p;
378 }
379
380 void *
381 xrealloc(void *p, size_t len) {
382 if((p = realloc(p, len)) == NULL)
383 die("Out of memory\n");
384 return p;
385 }
386
387 void *
388 xcalloc(size_t nmemb, size_t size) {
389 void *p = calloc(nmemb, size);
390 if(!p)
391 die("Out of memory\n");
392 return p;
393 }
394
395 int
396 utf8decode(char *s, long *u) {
397 uchar c;
398 int i, n, rtn;
399
400 rtn = 1;
401 c = *s;
402 if(~c & B7) { /* 0xxxxxxx */
403 *u = c;
404 return rtn;
405 } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
406 *u = c&(B4|B3|B2|B1|B0);
407 n = 1;
408 } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
409 *u = c&(B3|B2|B1|B0);
410 n = 2;
411 } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
412 *u = c & (B2|B1|B0);
413 n = 3;
414 } else
415 goto invalid;
416 for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
417 c = *s;
418 if((c & (B7|B6)) != B7) /* 10xxxxxx */
419 goto invalid;
420 *u <<= 6;
421 *u |= c & (B5|B4|B3|B2|B1|B0);
422 }
423 if((n == 1 && *u < 0x80) ||
424 (n == 2 && *u < 0x800) ||
425 (n == 3 && *u < 0x10000) ||
426 (*u >= 0xD800 && *u <= 0xDFFF))
427 goto invalid;
428 return rtn;
429 invalid:
430 *u = 0xFFFD;
431 return rtn;
432 }
433
434 int
435 utf8encode(long *u, char *s) {
436 uchar *sp;
437 ulong uc;
438 int i, n;
439
440 sp = (uchar*) s;
441 uc = *u;
442 if(uc < 0x80) {
443 *sp = uc; /* 0xxxxxxx */
444 return 1;
445 } else if(*u < 0x800) {
446 *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
447 n = 1;
448 } else if(uc < 0x10000) {
449 *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
450 n = 2;
451 } else if(uc <= 0x10FFFF) {
452 *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
453 n = 3;
454 } else {
455 goto invalid;
456 }
457 for(i=n,++sp; i>0; --i,++sp)
458 *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
459 return n+1;
460 invalid:
461 /* U+FFFD */
462 *s++ = '\xEF';
463 *s++ = '\xBF';
464 *s = '\xBD';
465 return 3;
466 }
467
468 /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
469 UTF-8 otherwise return 0 */
470 int
471 isfullutf8(char *s, int b) {
472 uchar *c1, *c2, *c3;
473
474 c1 = (uchar *) s;
475 c2 = (uchar *) ++s;
476 c3 = (uchar *) ++s;
477 if(b < 1)
478 return 0;
479 else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
480 return 0;
481 else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
482 ((b == 1) ||
483 ((b == 2) && (*c2&(B7|B6)) == B7)))
484 return 0;
485 else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
486 ((b == 1) ||
487 ((b == 2) && (*c2&(B7|B6)) == B7) ||
488 ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
489 return 0;
490 else
491 return 1;
492 }
493
494 int
495 utf8size(char *s) {
496 uchar c = *s;
497
498 if(~c&B7)
499 return 1;
500 else if((c&(B7|B6|B5)) == (B7|B6))
501 return 2;
502 else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
503 return 3;
504 else
505 return 4;
506 }
507
508 void
509 selinit(void) {
510 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
511 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
512 sel.mode = 0;
513 sel.bx = -1;
514 sel.clip = NULL;
515 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
516 if(sel.xtarget == None)
517 sel.xtarget = XA_STRING;
518 }
519
520 static inline bool
521 selected(int x, int y) {
522 if(sel.ey == y && sel.by == y) {
523 int bx = MIN(sel.bx, sel.ex);
524 int ex = MAX(sel.bx, sel.ex);
525 return BETWEEN(x, bx, ex);
526 }
527 return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
528 || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
529 }
530
531 void
532 getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
533 if(b)
534 *b = e->xbutton.button;
535
536 *x = X2COL(e->xbutton.x);
537 *y = Y2ROW(e->xbutton.y);
538 sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
539 sel.b.y = MIN(sel.by, sel.ey);
540 sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
541 sel.e.y = MAX(sel.by, sel.ey);
542 }
543
544 void
545 mousereport(XEvent *e) {
546 int x = X2COL(e->xbutton.x);
547 int y = Y2ROW(e->xbutton.y);
548 int button = e->xbutton.button;
549 int state = e->xbutton.state;
550 char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
551 static int ob, ox, oy;
552
553 /* from urxvt */
554 if(e->xbutton.type == MotionNotify) {
555 if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
556 return;
557 button = ob + 32;
558 ox = x, oy = y;
559 } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
560 button = 3;
561 } else {
562 button -= Button1;
563 if(button >= 3)
564 button += 64 - 3;
565 if(e->xbutton.type == ButtonPress) {
566 ob = button;
567 ox = x, oy = y;
568 }
569 }
570
571 buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
572 + (state & Mod4Mask ? 8 : 0)
573 + (state & ControlMask ? 16 : 0);
574
575 ttywrite(buf, sizeof(buf));
576 }
577
578 void
579 bpress(XEvent *e) {
580 if(IS_SET(MODE_MOUSE))
581 mousereport(e);
582 else if(e->xbutton.button == Button1) {
583 if(sel.bx != -1) {
584 sel.bx = -1;
585 tsetdirt(sel.b.y, sel.e.y);
586 draw();
587 }
588 sel.mode = 1;
589 sel.ex = sel.bx = X2COL(e->xbutton.x);
590 sel.ey = sel.by = Y2ROW(e->xbutton.y);
591 }
592 }
593
594 void
595 selcopy(void) {
596 char *str, *ptr;
597 int x, y, bufsize, is_selected = 0;
598
599 if(sel.bx == -1)
600 str = NULL;
601
602 else {
603 bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
604 ptr = str = xmalloc(bufsize);
605
606 /* append every set & selected glyph to the selection */
607 for(y = 0; y < term.row; y++) {
608 for(x = 0; x < term.col; x++) {
609 int size;
610 char *p;
611 Glyph *gp = &term.line[y][x];
612
613 if(!(is_selected = selected(x, y)))
614 continue;
615 p = (gp->state & GLYPH_SET) ? gp->c : " ";
616 size = utf8size(p);
617 memcpy(ptr, p, size);
618 ptr += size;
619 }
620 /* \n at the end of every selected line except for the last one */
621 if(is_selected && y < sel.e.y)
622 *ptr++ = '\n';
623 }
624 *ptr = 0;
625 }
626 sel.alt = IS_SET(MODE_ALTSCREEN);
627 xsetsel(str);
628 }
629
630 void
631 selnotify(XEvent *e) {
632 ulong nitems, ofs, rem;
633 int format;
634 uchar *data;
635 Atom type;
636
637 ofs = 0;
638 do {
639 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
640 False, AnyPropertyType, &type, &format,
641 &nitems, &rem, &data)) {
642 fprintf(stderr, "Clipboard allocation failed\n");
643 return;
644 }
645 ttywrite((const char *) data, nitems * format / 8);
646 XFree(data);
647 /* number of 32-bit chunks returned */
648 ofs += nitems * format / 32;
649 } while(rem > 0);
650 }
651
652 void
653 selpaste() {
654 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
655 }
656
657 void selclear(XEvent *e) {
658 if(sel.bx == -1)
659 return;
660 sel.bx = -1;
661 tsetdirt(sel.b.y, sel.e.y);
662 }
663
664 void
665 selrequest(XEvent *e) {
666 XSelectionRequestEvent *xsre;
667 XSelectionEvent xev;
668 Atom xa_targets;
669
670 xsre = (XSelectionRequestEvent *) e;
671 xev.type = SelectionNotify;
672 xev.requestor = xsre->requestor;
673 xev.selection = xsre->selection;
674 xev.target = xsre->target;
675 xev.time = xsre->time;
676 /* reject */
677 xev.property = None;
678
679 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
680 if(xsre->target == xa_targets) {
681 /* respond with the supported type */
682 Atom string = sel.xtarget;
683 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
684 XA_ATOM, 32, PropModeReplace,
685 (uchar *) &string, 1);
686 xev.property = xsre->property;
687 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
688 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
689 xsre->target, 8, PropModeReplace,
690 (uchar *) sel.clip, strlen(sel.clip));
691 xev.property = xsre->property;
692 }
693
694 /* all done, send a notification to the listener */
695 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
696 fprintf(stderr, "Error sending SelectionNotify event\n");
697 }
698
699 void
700 xsetsel(char *str) {
701 /* register the selection for both the clipboard and the primary */
702 Atom clipboard;
703
704 free(sel.clip);
705 sel.clip = str;
706
707 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
708
709 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
710 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
711 }
712
713 void
714 brelease(XEvent *e) {
715 if(IS_SET(MODE_MOUSE)) {
716 mousereport(e);
717 return;
718 }
719 if(e->xbutton.button == Button2)
720 selpaste();
721 else if(e->xbutton.button == Button1) {
722 sel.mode = 0;
723 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
724 term.dirty[sel.ey] = 1;
725 if(sel.bx == sel.ex && sel.by == sel.ey) {
726 struct timeval now;
727 sel.bx = -1;
728 gettimeofday(&now, NULL);
729
730 if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
731 /* triple click on the line */
732 sel.b.x = sel.bx = 0;
733 sel.e.x = sel.ex = term.col;
734 sel.b.y = sel.e.y = sel.ey;
735 selcopy();
736 } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
737 /* double click to select word */
738 sel.bx = sel.ex;
739 while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
740 term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
741 sel.b.x = sel.bx;
742 while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
743 term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
744 sel.e.x = sel.ex;
745 sel.b.y = sel.e.y = sel.ey;
746 selcopy();
747 }
748 } else
749 selcopy();
750 }
751 memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
752 gettimeofday(&sel.tclick1, NULL);
753 }
754
755 void
756 bmotion(XEvent *e) {
757 if(IS_SET(MODE_MOUSE)) {
758 mousereport(e);
759 return;
760 }
761 if(sel.mode) {
762 int oldey = sel.ey, oldex = sel.ex;
763 getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
764
765 if(oldey != sel.ey || oldex != sel.ex) {
766 int starty = MIN(oldey, sel.ey);
767 int endy = MAX(oldey, sel.ey);
768 tsetdirt(starty, endy);
769 }
770 }
771 }
772
773 void
774 die(const char *errstr, ...) {
775 va_list ap;
776
777 va_start(ap, errstr);
778 vfprintf(stderr, errstr, ap);
779 va_end(ap);
780 exit(EXIT_FAILURE);
781 }
782
783 void
784 execsh(void) {
785 char **args;
786 char *envshell = getenv("SHELL");
787
788 unsetenv("COLUMNS");
789 unsetenv("LINES");
790 unsetenv("TERMCAP");
791
792 signal(SIGCHLD, SIG_DFL);
793 signal(SIGHUP, SIG_DFL);
794 signal(SIGINT, SIG_DFL);
795 signal(SIGQUIT, SIG_DFL);
796 signal(SIGTERM, SIG_DFL);
797 signal(SIGALRM, SIG_DFL);
798
799 DEFAULT(envshell, SHELL);
800 putenv("TERM="TNAME);
801 args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
802 execvp(args[0], args);
803 exit(EXIT_FAILURE);
804 }
805
806 void
807 sigchld(int a) {
808 int stat = 0;
809 if(waitpid(pid, &stat, 0) < 0)
810 die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
811 if(WIFEXITED(stat))
812 exit(WEXITSTATUS(stat));
813 else
814 exit(EXIT_FAILURE);
815 }
816
817 void
818 ttynew(void) {
819 int m, s;
820
821 /* seems to work fine on linux, openbsd and freebsd */
822 struct winsize w = {term.row, term.col, 0, 0};
823 if(openpty(&m, &s, NULL, NULL, &w) < 0)
824 die("openpty failed: %s\n", SERRNO);
825
826 switch(pid = fork()) {
827 case -1:
828 die("fork failed\n");
829 break;
830 case 0:
831 setsid(); /* create a new process group */
832 dup2(s, STDIN_FILENO);
833 dup2(s, STDOUT_FILENO);
834 dup2(s, STDERR_FILENO);
835 if(ioctl(s, TIOCSCTTY, NULL) < 0)
836 die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
837 close(s);
838 close(m);
839 execsh();
840 break;
841 default:
842 close(s);
843 cmdfd = m;
844 signal(SIGCHLD, sigchld);
845 if(opt_io) {
846 if(!strcmp(opt_io, "-")) {
847 iofd = STDOUT_FILENO;
848 } else {
849 if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
850 fprintf(stderr, "Error opening %s:%s\n",
851 opt_io, strerror(errno));
852 }
853 }
854 }
855 }
856 }
857
858 void
859 dump(char c) {
860 static int col;
861 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
862 if(++col % 10 == 0)
863 fprintf(stderr, "\n");
864 }
865
866 void
867 ttyread(void) {
868 static char buf[BUFSIZ];
869 static int buflen = 0;
870 char *ptr;
871 char s[UTF_SIZ];
872 int charsize; /* size of utf8 char in bytes */
873 long utf8c;
874 int ret;
875
876 /* append read bytes to unprocessed bytes */
877 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
878 die("Couldn't read from shell: %s\n", SERRNO);
879
880 /* process every complete utf8 char */
881 buflen += ret;
882 ptr = buf;
883 while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
884 charsize = utf8decode(ptr, &utf8c);
885 utf8encode(&utf8c, s);
886 tputc(s);
887 ptr += charsize;
888 buflen -= charsize;
889 }
890
891 /* keep any uncomplete utf8 char for the next call */
892 memmove(buf, ptr, buflen);
893 }
894
895 void
896 ttywrite(const char *s, size_t n) {
897 if(write(cmdfd, s, n) == -1)
898 die("write error on tty: %s\n", SERRNO);
899 }
900
901 void
902 ttyresize(int x, int y) {
903 struct winsize w;
904
905 w.ws_row = term.row;
906 w.ws_col = term.col;
907 w.ws_xpixel = xw.tw;
908 w.ws_ypixel = xw.th;
909 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
910 fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
911 }
912
913 void
914 tsetdirt(int top, int bot)
915 {
916 int i;
917
918 LIMIT(top, 0, term.row-1);
919 LIMIT(bot, 0, term.row-1);
920
921 for(i = top; i <= bot; i++)
922 term.dirty[i] = 1;
923 }
924
925 void
926 tfulldirt(void)
927 {
928 tsetdirt(0, term.row-1);
929 }
930
931 void
932 tcursor(int mode) {
933 static TCursor c;
934
935 if(mode == CURSOR_SAVE)
936 c = term.c;
937 else if(mode == CURSOR_LOAD)
938 term.c = c, tmoveto(c.x, c.y);
939 }
940
941 void
942 treset(void) {
943 unsigned i;
944 term.c = (TCursor){{
945 .mode = ATTR_NULL,
946 .fg = DefaultFG,
947 .bg = DefaultBG
948 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
949
950 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
951 for(i = TAB; i < term.col; i += TAB)
952 term.tabs[i] = 1;
953 term.top = 0, term.bot = term.row - 1;
954 term.mode = MODE_WRAP;
955 tclearregion(0, 0, term.col-1, term.row-1);
956 }
957
958 void
959 tnew(int col, int row) {
960 /* set screen size */
961 term.row = row, term.col = col;
962 term.line = xmalloc(term.row * sizeof(Line));
963 term.alt = xmalloc(term.row * sizeof(Line));
964 term.dirty = xmalloc(term.row * sizeof(*term.dirty));
965 term.tabs = xmalloc(term.col * sizeof(*term.tabs));
966
967 for(row = 0; row < term.row; row++) {
968 term.line[row] = xmalloc(term.col * sizeof(Glyph));
969 term.alt [row] = xmalloc(term.col * sizeof(Glyph));
970 term.dirty[row] = 0;
971 }
972 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
973 /* setup screen */
974 treset();
975 }
976
977 void
978 tswapscreen(void) {
979 Line* tmp = term.line;
980 term.line = term.alt;
981 term.alt = tmp;
982 term.mode ^= MODE_ALTSCREEN;
983 tfulldirt();
984 }
985
986 void
987 tscrolldown(int orig, int n) {
988 int i;
989 Line temp;
990
991 LIMIT(n, 0, term.bot-orig+1);
992
993 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
994
995 for(i = term.bot; i >= orig+n; i--) {
996 temp = term.line[i];
997 term.line[i] = term.line[i-n];
998 term.line[i-n] = temp;
999
1000 term.dirty[i] = 1;
1001 term.dirty[i-n] = 1;
1002 }
1003
1004 selscroll(orig, n);
1005 }
1006
1007 void
1008 tscrollup(int orig, int n) {
1009 int i;
1010 Line temp;
1011 LIMIT(n, 0, term.bot-orig+1);
1012
1013 tclearregion(0, orig, term.col-1, orig+n-1);
1014
1015 for(i = orig; i <= term.bot-n; i++) {
1016 temp = term.line[i];
1017 term.line[i] = term.line[i+n];
1018 term.line[i+n] = temp;
1019
1020 term.dirty[i] = 1;
1021 term.dirty[i+n] = 1;
1022 }
1023
1024 selscroll(orig, -n);
1025 }
1026
1027 void
1028 selscroll(int orig, int n) {
1029 if(sel.bx == -1)
1030 return;
1031
1032 if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
1033 if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
1034 sel.bx = -1;
1035 return;
1036 }
1037 if(sel.by < term.top) {
1038 sel.by = term.top;
1039 sel.bx = 0;
1040 }
1041 if(sel.ey > term.bot) {
1042 sel.ey = term.bot;
1043 sel.ex = term.col;
1044 }
1045 sel.b.y = sel.by, sel.b.x = sel.bx;
1046 sel.e.y = sel.ey, sel.e.x = sel.ex;
1047 }
1048 }
1049
1050 void
1051 tnewline(int first_col) {
1052 int y = term.c.y;
1053 if(y == term.bot)
1054 tscrollup(term.top, 1);
1055 else
1056 y++;
1057 tmoveto(first_col ? 0 : term.c.x, y);
1058 }
1059
1060 void
1061 csiparse(void) {
1062 /* int noarg = 1; */
1063 char *p = csiescseq.buf;
1064
1065 csiescseq.narg = 0;
1066 if(*p == '?')
1067 csiescseq.priv = 1, p++;
1068
1069 while(p < csiescseq.buf+csiescseq.len) {
1070 while(isdigit(*p)) {
1071 csiescseq.arg[csiescseq.narg] *= 10;
1072 csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
1073 }
1074 if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
1075 csiescseq.narg++, p++;
1076 else {
1077 csiescseq.mode = *p;
1078 csiescseq.narg++;
1079 return;
1080 }
1081 }
1082 }
1083
1084 void
1085 tmoveto(int x, int y) {
1086 LIMIT(x, 0, term.col-1);
1087 LIMIT(y, 0, term.row-1);
1088 term.c.state &= ~CURSOR_WRAPNEXT;
1089 term.c.x = x;
1090 term.c.y = y;
1091 }
1092
1093 void
1094 tsetchar(char *c) {
1095 term.dirty[term.c.y] = 1;
1096 term.line[term.c.y][term.c.x] = term.c.attr;
1097 memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
1098 term.line[term.c.y][term.c.x].state |= GLYPH_SET;
1099 }
1100
1101 void
1102 tclearregion(int x1, int y1, int x2, int y2) {
1103 int x, y, temp;
1104
1105 if(x1 > x2)
1106 temp = x1, x1 = x2, x2 = temp;
1107 if(y1 > y2)
1108 temp = y1, y1 = y2, y2 = temp;
1109
1110 LIMIT(x1, 0, term.col-1);
1111 LIMIT(x2, 0, term.col-1);
1112 LIMIT(y1, 0, term.row-1);
1113 LIMIT(y2, 0, term.row-1);
1114
1115 for(y = y1; y <= y2; y++) {
1116 term.dirty[y] = 1;
1117 for(x = x1; x <= x2; x++)
1118 term.line[y][x].state = 0;
1119 }
1120 }
1121
1122 void
1123 tdeletechar(int n) {
1124 int src = term.c.x + n;
1125 int dst = term.c.x;
1126 int size = term.col - src;
1127
1128 term.dirty[term.c.y] = 1;
1129
1130 if(src >= term.col) {
1131 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1132 return;
1133 }
1134 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1135 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1136 }
1137
1138 void
1139 tinsertblank(int n) {
1140 int src = term.c.x;
1141 int dst = src + n;
1142 int size = term.col - dst;
1143
1144 term.dirty[term.c.y] = 1;
1145
1146 if(dst >= term.col) {
1147 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1148 return;
1149 }
1150 memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
1151 tclearregion(src, term.c.y, dst - 1, term.c.y);
1152 }
1153
1154 void
1155 tinsertblankline(int n) {
1156 if(term.c.y < term.top || term.c.y > term.bot)
1157 return;
1158
1159 tscrolldown(term.c.y, n);
1160 }
1161
1162 void
1163 tdeleteline(int n) {
1164 if(term.c.y < term.top || term.c.y > term.bot)
1165 return;
1166
1167 tscrollup(term.c.y, n);
1168 }
1169
1170 void
1171 tsetattr(int *attr, int l) {
1172 int i;
1173
1174 for(i = 0; i < l; i++) {
1175 switch(attr[i]) {
1176 case 0:
1177 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
1178 | ATTR_ITALIC | ATTR_BLINK);
1179 term.c.attr.fg = DefaultFG;
1180 term.c.attr.bg = DefaultBG;
1181 break;
1182 case 1:
1183 term.c.attr.mode |= ATTR_BOLD;
1184 break;
1185 case 3: /* enter standout (highlight) */
1186 term.c.attr.mode |= ATTR_ITALIC;
1187 break;
1188 case 4:
1189 term.c.attr.mode |= ATTR_UNDERLINE;
1190 break;
1191 case 5:
1192 term.c.attr.mode |= ATTR_BLINK;
1193 break;
1194 case 7:
1195 term.c.attr.mode |= ATTR_REVERSE;
1196 break;
1197 case 21:
1198 case 22:
1199 term.c.attr.mode &= ~ATTR_BOLD;
1200 break;
1201 case 23: /* leave standout (highlight) mode */
1202 term.c.attr.mode &= ~ATTR_ITALIC;
1203 break;
1204 case 24:
1205 term.c.attr.mode &= ~ATTR_UNDERLINE;
1206 break;
1207 case 25:
1208 term.c.attr.mode &= ~ATTR_BLINK;
1209 break;
1210 case 27:
1211 term.c.attr.mode &= ~ATTR_REVERSE;
1212 break;
1213 case 38:
1214 if(i + 2 < l && attr[i + 1] == 5) {
1215 i += 2;
1216 if(BETWEEN(attr[i], 0, 255))
1217 term.c.attr.fg = attr[i];
1218 else
1219 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
1220 }
1221 else
1222 fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
1223 break;
1224 case 39:
1225 term.c.attr.fg = DefaultFG;
1226 break;
1227 case 48:
1228 if(i + 2 < l && attr[i + 1] == 5) {
1229 i += 2;
1230 if(BETWEEN(attr[i], 0, 255))
1231 term.c.attr.bg = attr[i];
1232 else
1233 fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
1234 }
1235 else
1236 fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
1237 break;
1238 case 49:
1239 term.c.attr.bg = DefaultBG;
1240 break;
1241 default:
1242 if(BETWEEN(attr[i], 30, 37))
1243 term.c.attr.fg = attr[i] - 30;
1244 else if(BETWEEN(attr[i], 40, 47))
1245 term.c.attr.bg = attr[i] - 40;
1246 else if(BETWEEN(attr[i], 90, 97))
1247 term.c.attr.fg = attr[i] - 90 + 8;
1248 else if(BETWEEN(attr[i], 100, 107))
1249 term.c.attr.bg = attr[i] - 100 + 8;
1250 else
1251 fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
1252 break;
1253 }
1254 }
1255 }
1256
1257 void
1258 tsetscroll(int t, int b) {
1259 int temp;
1260
1261 LIMIT(t, 0, term.row-1);
1262 LIMIT(b, 0, term.row-1);
1263 if(t > b) {
1264 temp = t;
1265 t = b;
1266 b = temp;
1267 }
1268 term.top = t;
1269 term.bot = b;
1270 }
1271
1272 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
1273
1274 void
1275 tsetmode(bool priv, bool set, int *args, int narg) {
1276 int *lim, mode;
1277
1278 for(lim = args + narg; args < lim; ++args) {
1279 if(priv) {
1280 switch(*args) {
1281 case 1:
1282 MODBIT(term.mode, set, MODE_APPKEYPAD);
1283 break;
1284 case 5: /* DECSCNM -- Reverve video */
1285 mode = term.mode;
1286 MODBIT(term.mode,set, MODE_REVERSE);
1287 if(mode != term.mode)
1288 redraw();
1289 break;
1290 case 7:
1291 MODBIT(term.mode, set, MODE_WRAP);
1292 break;
1293 case 20:
1294 MODBIT(term.mode, set, MODE_CRLF);
1295 break;
1296 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1297 break;
1298 case 25:
1299 MODBIT(term.c.state, !set, CURSOR_HIDE);
1300 break;
1301 case 1000: /* 1000,1002: enable xterm mouse report */
1302 MODBIT(term.mode, set, MODE_MOUSEBTN);
1303 break;
1304 case 1002:
1305 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1306 break;
1307 case 1049: /* = 1047 and 1048 */
1308 case 47:
1309 case 1047:
1310 if(IS_SET(MODE_ALTSCREEN))
1311 tclearregion(0, 0, term.col-1, term.row-1);
1312 if((set && !IS_SET(MODE_ALTSCREEN)) ||
1313 (!set && IS_SET(MODE_ALTSCREEN))) {
1314 tswapscreen();
1315 }
1316 if(*args != 1049)
1317 break;
1318 /* pass through */
1319 case 1048:
1320 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1321 break;
1322 default:
1323 fprintf(stderr,
1324 "erresc: unknown private set/reset mode %d\n",
1325 *args);
1326 break;
1327 }
1328 } else {
1329 switch(*args) {
1330 case 4:
1331 MODBIT(term.mode, set, MODE_INSERT);
1332 break;
1333 default:
1334 fprintf(stderr,
1335 "erresc: unknown set/reset mode %d\n",
1336 *args);
1337 break;
1338 }
1339 }
1340 }
1341 }
1342 #undef MODBIT
1343
1344
1345 void
1346 csihandle(void) {
1347 switch(csiescseq.mode) {
1348 default:
1349 unknown:
1350 fprintf(stderr, "erresc: unknown csi ");
1351 csidump();
1352 /* die(""); */
1353 break;
1354 case '@': /* ICH -- Insert <n> blank char */
1355 DEFAULT(csiescseq.arg[0], 1);
1356 tinsertblank(csiescseq.arg[0]);
1357 break;
1358 case 'A': /* CUU -- Cursor <n> Up */
1359 case 'e':
1360 DEFAULT(csiescseq.arg[0], 1);
1361 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1362 break;
1363 case 'B': /* CUD -- Cursor <n> Down */
1364 DEFAULT(csiescseq.arg[0], 1);
1365 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1366 break;
1367 case 'C': /* CUF -- Cursor <n> Forward */
1368 case 'a':
1369 DEFAULT(csiescseq.arg[0], 1);
1370 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1371 break;
1372 case 'D': /* CUB -- Cursor <n> Backward */
1373 DEFAULT(csiescseq.arg[0], 1);
1374 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1375 break;
1376 case 'E': /* CNL -- Cursor <n> Down and first col */
1377 DEFAULT(csiescseq.arg[0], 1);
1378 tmoveto(0, term.c.y+csiescseq.arg[0]);
1379 break;
1380 case 'F': /* CPL -- Cursor <n> Up and first col */
1381 DEFAULT(csiescseq.arg[0], 1);
1382 tmoveto(0, term.c.y-csiescseq.arg[0]);
1383 break;
1384 case 'g': /* TBC -- Tabulation clear */
1385 switch (csiescseq.arg[0]) {
1386 case 0: /* clear current tab stop */
1387 term.tabs[term.c.x] = 0;
1388 break;
1389 case 3: /* clear all the tabs */
1390 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1391 break;
1392 default:
1393 goto unknown;
1394 }
1395 break;
1396 case 'G': /* CHA -- Move to <col> */
1397 case '`': /* HPA */
1398 DEFAULT(csiescseq.arg[0], 1);
1399 tmoveto(csiescseq.arg[0]-1, term.c.y);
1400 break;
1401 case 'H': /* CUP -- Move to <row> <col> */
1402 case 'f': /* HVP */
1403 DEFAULT(csiescseq.arg[0], 1);
1404 DEFAULT(csiescseq.arg[1], 1);
1405 tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1406 break;
1407 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1408 DEFAULT(csiescseq.arg[0], 1);
1409 while(csiescseq.arg[0]--)
1410 tputtab(1);
1411 break;
1412 case 'J': /* ED -- Clear screen */
1413 sel.bx = -1;
1414 switch(csiescseq.arg[0]) {
1415 case 0: /* below */
1416 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1417 if(term.c.y < term.row-1)
1418 tclearregion(0, term.c.y+1, term.col-1, term.row-1);
1419 break;
1420 case 1: /* above */
1421 if(term.c.y > 1)
1422 tclearregion(0, 0, term.col-1, term.c.y-1);
1423 tclearregion(0, term.c.y, term.c.x, term.c.y);
1424 break;
1425 case 2: /* all */
1426 tclearregion(0, 0, term.col-1, term.row-1);
1427 break;
1428 default:
1429 goto unknown;
1430 }
1431 break;
1432 case 'K': /* EL -- Clear line */
1433 switch(csiescseq.arg[0]) {
1434 case 0: /* right */
1435 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1436 break;
1437 case 1: /* left */
1438 tclearregion(0, term.c.y, term.c.x, term.c.y);
1439 break;
1440 case 2: /* all */
1441 tclearregion(0, term.c.y, term.col-1, term.c.y);
1442 break;
1443 }
1444 break;
1445 case 'S': /* SU -- Scroll <n> line up */
1446 DEFAULT(csiescseq.arg[0], 1);
1447 tscrollup(term.top, csiescseq.arg[0]);
1448 break;
1449 case 'T': /* SD -- Scroll <n> line down */
1450 DEFAULT(csiescseq.arg[0], 1);
1451 tscrolldown(term.top, csiescseq.arg[0]);
1452 break;
1453 case 'L': /* IL -- Insert <n> blank lines */
1454 DEFAULT(csiescseq.arg[0], 1);
1455 tinsertblankline(csiescseq.arg[0]);
1456 break;
1457 case 'l': /* RM -- Reset Mode */
1458 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1459 break;
1460 case 'M': /* DL -- Delete <n> lines */
1461 DEFAULT(csiescseq.arg[0], 1);
1462 tdeleteline(csiescseq.arg[0]);
1463 break;
1464 case 'X': /* ECH -- Erase <n> char */
1465 DEFAULT(csiescseq.arg[0], 1);
1466 tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
1467 break;
1468 case 'P': /* DCH -- Delete <n> char */
1469 DEFAULT(csiescseq.arg[0], 1);
1470 tdeletechar(csiescseq.arg[0]);
1471 break;
1472 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1473 DEFAULT(csiescseq.arg[0], 1);
1474 while(csiescseq.arg[0]--)
1475 tputtab(0);
1476 break;
1477 case 'd': /* VPA -- Move to <row> */
1478 DEFAULT(csiescseq.arg[0], 1);
1479 tmoveto(term.c.x, csiescseq.arg[0]-1);
1480 break;
1481 case 'h': /* SM -- Set terminal mode */
1482 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1483 break;
1484 case 'm': /* SGR -- Terminal attribute (color) */
1485 tsetattr(csiescseq.arg, csiescseq.narg);
1486 break;
1487 case 'r': /* DECSTBM -- Set Scrolling Region */
1488 if(csiescseq.priv)
1489 goto unknown;
1490 else {
1491 DEFAULT(csiescseq.arg[0], 1);
1492 DEFAULT(csiescseq.arg[1], term.row);
1493 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1494 tmoveto(0, 0);
1495 }
1496 break;
1497 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1498 tcursor(CURSOR_SAVE);
1499 break;
1500 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1501 tcursor(CURSOR_LOAD);
1502 break;
1503 }
1504 }
1505
1506 void
1507 csidump(void) {
1508 int i;
1509 printf("ESC[");
1510 for(i = 0; i < csiescseq.len; i++) {
1511 uint c = csiescseq.buf[i] & 0xff;
1512 if(isprint(c)) putchar(c);
1513 else if(c == '\n') printf("(\\n)");
1514 else if(c == '\r') printf("(\\r)");
1515 else if(c == 0x1b) printf("(\\e)");
1516 else printf("(%02x)", c);
1517 }
1518 putchar('\n');
1519 }
1520
1521 void
1522 csireset(void) {
1523 memset(&csiescseq, 0, sizeof(csiescseq));
1524 }
1525
1526 void
1527 strhandle(void) {
1528 char *p;
1529
1530 /*
1531 * TODO: make this being useful in case of color palette change.
1532 */
1533 strparse();
1534
1535 p = strescseq.buf;
1536
1537 switch(strescseq.type) {
1538 case ']': /* OSC -- Operating System Command */
1539 switch(p[0]) {
1540 case '0':
1541 case '1':
1542 case '2':
1543 /*
1544 * TODO: Handle special chars in string, like umlauts.
1545 */
1546 if(p[1] == ';') {
1547 XStoreName(xw.dpy, xw.win, strescseq.buf+2);
1548 }
1549 break;
1550 case ';':
1551 XStoreName(xw.dpy, xw.win, strescseq.buf+1);
1552 break;
1553 case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
1554 break;
1555 default:
1556 fprintf(stderr, "erresc: unknown str ");
1557 strdump();
1558 break;
1559 }
1560 break;
1561 case 'k': /* old title set compatibility */
1562 XStoreName(xw.dpy, xw.win, strescseq.buf);
1563 break;
1564 case 'P': /* DSC -- Device Control String */
1565 case '_': /* APC -- Application Program Command */
1566 case '^': /* PM -- Privacy Message */
1567 default:
1568 fprintf(stderr, "erresc: unknown str ");
1569 strdump();
1570 /* die(""); */
1571 break;
1572 }
1573 }
1574
1575 void
1576 strparse(void) {
1577 /*
1578 * TODO: Implement parsing like for CSI when required.
1579 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
1580 */
1581 return;
1582 }
1583
1584 void
1585 strdump(void) {
1586 int i;
1587 printf("ESC%c", strescseq.type);
1588 for(i = 0; i < strescseq.len; i++) {
1589 uint c = strescseq.buf[i] & 0xff;
1590 if(isprint(c)) putchar(c);
1591 else if(c == '\n') printf("(\\n)");
1592 else if(c == '\r') printf("(\\r)");
1593 else if(c == 0x1b) printf("(\\e)");
1594 else printf("(%02x)", c);
1595 }
1596 printf("ESC\\\n");
1597 }
1598
1599 void
1600 strreset(void) {
1601 memset(&strescseq, 0, sizeof(strescseq));
1602 }
1603
1604 void
1605 tputtab(bool forward) {
1606 unsigned x = term.c.x;
1607
1608 if(forward) {
1609 if(x == term.col)
1610 return;
1611 for(++x; x < term.col && !term.tabs[x]; ++x)
1612 /* nothing */ ;
1613 } else {
1614 if(x == 0)
1615 return;
1616 for(--x; x > 0 && !term.tabs[x]; --x)
1617 /* nothing */ ;
1618 }
1619 tmoveto(x, term.c.y);
1620 }
1621
1622 void
1623 tputc(char *c) {
1624 char ascii = *c;
1625
1626 if(iofd != -1)
1627 write(iofd, c, 1);
1628
1629 if(term.esc & ESC_START) {
1630 if(term.esc & ESC_CSI) {
1631 csiescseq.buf[csiescseq.len++] = ascii;
1632 if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
1633 term.esc = 0;
1634 csiparse(), csihandle();
1635 }
1636 } else if(term.esc & ESC_STR) {
1637 switch(ascii) {
1638 case '\033':
1639 term.esc = ESC_START | ESC_STR_END;
1640 break;
1641 case '\a': /* backwards compatibility to xterm */
1642 term.esc = 0;
1643 strhandle();
1644 break;
1645 default:
1646 strescseq.buf[strescseq.len++] = ascii;
1647 if(strescseq.len+1 >= STR_BUF_SIZ) {
1648 term.esc = 0;
1649 strhandle();
1650 }
1651 }
1652 } else if(term.esc & ESC_STR_END) {
1653 term.esc = 0;
1654 if(ascii == '\\')
1655 strhandle();
1656 } else if(term.esc & ESC_ALTCHARSET) {
1657 switch(ascii) {
1658 case '0': /* Line drawing crap */
1659 term.c.attr.mode |= ATTR_GFX;
1660 break;
1661 case 'B': /* Back to regular text */
1662 term.c.attr.mode &= ~ATTR_GFX;
1663 break;
1664 default:
1665 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
1666 }
1667 term.esc = 0;
1668 } else {
1669 switch(ascii) {
1670 case '[':
1671 term.esc |= ESC_CSI;
1672 break;
1673 case 'P': /* DCS -- Device Control String */
1674 case '_': /* APC -- Application Program Command */
1675 case '^': /* PM -- Privacy Message */
1676 case ']': /* OSC -- Operating System Command */
1677 case 'k': /* old title set compatibility */
1678 strreset();
1679 strescseq.type = ascii;
1680 term.esc |= ESC_STR;
1681 break;
1682 case '(':
1683 term.esc |= ESC_ALTCHARSET;
1684 break;
1685 case 'D': /* IND -- Linefeed */
1686 if(term.c.y == term.bot)
1687 tscrollup(term.top, 1);
1688 else
1689 tmoveto(term.c.x, term.c.y+1);
1690 term.esc = 0;
1691 break;
1692 case 'E': /* NEL -- Next line */
1693 tnewline(1); /* always go to first col */
1694 term.esc = 0;
1695 break;
1696 case 'H': /* HTS -- Horizontal tab stop */
1697 term.tabs[term.c.x] = 1;
1698 term.esc = 0;
1699 break;
1700 case 'M': /* RI -- Reverse index */
1701 if(term.c.y == term.top)
1702 tscrolldown(term.top, 1);
1703 else
1704 tmoveto(term.c.x, term.c.y-1);
1705 term.esc = 0;
1706 break;
1707 case 'c': /* RIS -- Reset to inital state */
1708 treset();
1709 term.esc = 0;
1710 xresettitle();
1711 break;
1712 case '=': /* DECPAM -- Application keypad */
1713 term.mode |= MODE_APPKEYPAD;
1714 term.esc = 0;
1715 break;
1716 case '>': /* DECPNM -- Normal keypad */
1717 term.mode &= ~MODE_APPKEYPAD;
1718 term.esc = 0;
1719 break;
1720 case '7': /* DECSC -- Save Cursor */
1721 tcursor(CURSOR_SAVE);
1722 term.esc = 0;
1723 break;
1724 case '8': /* DECRC -- Restore Cursor */
1725 tcursor(CURSOR_LOAD);
1726 term.esc = 0;
1727 break;
1728 case '\\': /* ST -- Stop */
1729 term.esc = 0;
1730 break;
1731 default:
1732 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
1733 (uchar) ascii, isprint(ascii)?ascii:'.');
1734 term.esc = 0;
1735 }
1736 }
1737 } else {
1738 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
1739 sel.bx = -1;
1740 switch(ascii) {
1741 case '\0': /* padding character, do nothing */
1742 break;
1743 case '\t':
1744 tputtab(1);
1745 break;
1746 case '\b':
1747 tmoveto(term.c.x-1, term.c.y);
1748 break;
1749 case '\r':
1750 tmoveto(0, term.c.y);
1751 break;
1752 case '\f':
1753 case '\v':
1754 case '\n':
1755 /* go to first col if the mode is set */
1756 tnewline(IS_SET(MODE_CRLF));
1757 break;
1758 case '\a':
1759 if(!(xw.state & WIN_FOCUSED))
1760 xseturgency(1);
1761 break;
1762 case '\033':
1763 csireset();
1764 term.esc = ESC_START;
1765 break;
1766 default:
1767 if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
1768 tnewline(1); /* always go to first col */
1769 tsetchar(c);
1770 if(term.c.x+1 < term.col)
1771 tmoveto(term.c.x+1, term.c.y);
1772 else
1773 term.c.state |= CURSOR_WRAPNEXT;
1774 }
1775 }
1776 }
1777
1778 int
1779 tresize(int col, int row) {
1780 int i, x;
1781 int minrow = MIN(row, term.row);
1782 int mincol = MIN(col, term.col);
1783 int slide = term.c.y - row + 1;
1784
1785 if(col < 1 || row < 1)
1786 return 0;
1787
1788 /* free unneeded rows */
1789 i = 0;
1790 if(slide > 0) {
1791 /* slide screen to keep cursor where we expect it -
1792 * tscrollup would work here, but we can optimize to
1793 * memmove because we're freeing the earlier lines */
1794 for(/* i = 0 */; i < slide; i++) {
1795 free(term.line[i]);
1796 free(term.alt[i]);
1797 }
1798 memmove(term.line, term.line + slide, row * sizeof(Line));
1799 memmove(term.alt, term.alt + slide, row * sizeof(Line));
1800 }
1801 for(i += row; i < term.row; i++) {
1802 free(term.line[i]);
1803 free(term.alt[i]);
1804 }
1805
1806 /* resize to new height */
1807 term.line = xrealloc(term.line, row * sizeof(Line));
1808 term.alt = xrealloc(term.alt, row * sizeof(Line));
1809 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
1810 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
1811
1812 /* resize each row to new width, zero-pad if needed */
1813 for(i = 0; i < minrow; i++) {
1814 term.dirty[i] = 1;
1815 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
1816 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
1817 for(x = mincol; x < col; x++) {
1818 term.line[i][x].state = 0;
1819 term.alt[i][x].state = 0;
1820 }
1821 }
1822
1823 /* allocate any new rows */
1824 for(/* i == minrow */; i < row; i++) {
1825 term.dirty[i] = 1;
1826 term.line[i] = xcalloc(col, sizeof(Glyph));
1827 term.alt [i] = xcalloc(col, sizeof(Glyph));
1828 }
1829 if(col > term.col) {
1830 bool *bp = term.tabs + term.col;
1831
1832 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
1833 while(--bp > term.tabs && !*bp)
1834 /* nothing */ ;
1835 for(bp += TAB; bp < term.tabs + col; bp += TAB)
1836 *bp = 1;
1837 }
1838 /* update terminal size */
1839 term.col = col, term.row = row;
1840 /* make use of the LIMIT in tmoveto */
1841 tmoveto(term.c.x, term.c.y);
1842 /* reset scrolling region */
1843 tsetscroll(0, row-1);
1844
1845 return (slide > 0);
1846 }
1847
1848 void
1849 xresize(int col, int row) {
1850 xw.tw = MAX(1, 2*BORDER + col * xw.cw);
1851 xw.th = MAX(1, 2*BORDER + row * xw.ch);
1852
1853 XftDrawChange(xw.xft_draw, xw.buf);
1854 }
1855
1856 void
1857 xloadcols(void) {
1858 int i, r, g, b;
1859 XRenderColor xft_color = { .alpha = 0 };
1860 ulong white = WhitePixel(xw.dpy, xw.scr);
1861
1862 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
1863 for(i = 0; i < LEN(colorname); i++) {
1864 if(!colorname[i])
1865 continue;
1866 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
1867 dc.col[i] = white;
1868 fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
1869 } else
1870 dc.col[i] = dc.xft_col[i].pixel;
1871 }
1872
1873 /* load colors [16-255] ; same colors as xterm */
1874 for(i = 16, r = 0; r < 6; r++)
1875 for(g = 0; g < 6; g++)
1876 for(b = 0; b < 6; b++) {
1877 xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
1878 xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
1879 xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
1880 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
1881 dc.col[i] = white;
1882 fprintf(stderr, "Could not allocate color %d\n", i);
1883 } else
1884 dc.col[i] = dc.xft_col[i].pixel;
1885 i++;
1886 }
1887
1888 for(r = 0; r < 24; r++, i++) {
1889 xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
1890 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
1891 dc.col[i] = white;
1892 fprintf(stderr, "Could not allocate color %d\n", i);
1893 } else
1894 dc.col[i] = dc.xft_col[i].pixel;
1895 }
1896 }
1897
1898 void
1899 xclear(int x1, int y1, int x2, int y2) {
1900 XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
1901 XFillRectangle(xw.dpy, xw.buf, dc.gc,
1902 BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
1903 (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
1904 }
1905
1906 void
1907 xhints(void) {
1908 XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
1909 XWMHints wm = {.flags = InputHint, .input = 1};
1910 XSizeHints *sizeh = NULL;
1911
1912 sizeh = XAllocSizeHints();
1913 if(xw.isfixed == False) {
1914 sizeh->flags = PSize | PResizeInc | PBaseSize;
1915 sizeh->height = xw.h;
1916 sizeh->width = xw.w;
1917 sizeh->height_inc = xw.ch;
1918 sizeh->width_inc = xw.cw;
1919 sizeh->base_height = 2*BORDER;
1920 sizeh->base_width = 2*BORDER;
1921 } else {
1922 sizeh->flags = PMaxSize | PMinSize;
1923 sizeh->min_width = sizeh->max_width = xw.fw;
1924 sizeh->min_height = sizeh->max_height = xw.fh;
1925 }
1926
1927 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
1928 XFree(sizeh);
1929 }
1930
1931 void
1932 xinitfont(Font *f, char *fontstr) {
1933 f->xft_set = XftFontOpenName(xw.dpy, xw.scr, fontstr);
1934
1935 if(!f->xft_set)
1936 die("st: can't open font %s.\n", fontstr);
1937
1938 f->ascent = f->xft_set->ascent;
1939 f->descent = f->xft_set->descent;
1940 f->lbearing = 0;
1941 f->rbearing = f->xft_set->max_advance_width;
1942 }
1943
1944 void
1945 initfonts(char *fontstr, char *bfontstr, char *ifontstr, char *ibfontstr) {
1946 xinitfont(&dc.font, fontstr);
1947 xinitfont(&dc.bfont, bfontstr);
1948 xinitfont(&dc.ifont, ifontstr);
1949 xinitfont(&dc.ibfont, ibfontstr);
1950 }
1951
1952 void
1953 xinit(void) {
1954 XSetWindowAttributes attrs;
1955 Cursor cursor;
1956 Window parent;
1957 int sw, sh, major, minor;
1958
1959 if(!(xw.dpy = XOpenDisplay(NULL)))
1960 die("Can't open display\n");
1961 xw.scr = XDefaultScreen(xw.dpy);
1962 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
1963
1964 /* font */
1965 initfonts(FONT, BOLDFONT, ITALICFONT, ITALICBOLDFONT);
1966
1967 /* XXX: Assuming same size for bold font */
1968 xw.cw = dc.font.rbearing - dc.font.lbearing;
1969 xw.ch = dc.font.ascent + dc.font.descent;
1970
1971 /* colors */
1972 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
1973 xloadcols();
1974
1975 /* adjust fixed window geometry */
1976 if(xw.isfixed) {
1977 sw = DisplayWidth(xw.dpy, xw.scr);
1978 sh = DisplayHeight(xw.dpy, xw.scr);
1979 if(xw.fx < 0)
1980 xw.fx = sw + xw.fx - xw.fw - 1;
1981 if(xw.fy < 0)
1982 xw.fy = sh + xw.fy - xw.fh - 1;
1983
1984 xw.h = xw.fh;
1985 xw.w = xw.fw;
1986 } else {
1987 /* window - default size */
1988 xw.h = 2*BORDER + term.row * xw.ch;
1989 xw.w = 2*BORDER + term.col * xw.cw;
1990 xw.fx = 0;
1991 xw.fy = 0;
1992 }
1993
1994 attrs.background_pixel = dc.col[DefaultBG];
1995 attrs.border_pixel = dc.col[DefaultBG];
1996 attrs.bit_gravity = NorthWestGravity;
1997 attrs.event_mask = FocusChangeMask | KeyPressMask
1998 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
1999 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
2000 attrs.colormap = xw.cmap;
2001
2002 parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
2003 xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
2004 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
2005 xw.vis,
2006 CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
2007 | CWColormap,
2008 &attrs);
2009
2010 /* double buffering */
2011 if(!XdbeQueryExtension(xw.dpy, &major, &minor))
2012 die("Xdbe extension is not present\n");
2013 xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
2014
2015 /* Xft rendering context */
2016 xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
2017
2018 /* input methods */
2019 xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
2020 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
2021 | XIMStatusNothing, XNClientWindow, xw.win,
2022 XNFocusWindow, xw.win, NULL);
2023 /* gc */
2024 dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
2025
2026 /* white cursor, black outline */
2027 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
2028 XDefineCursor(xw.dpy, xw.win, cursor);
2029 XRecolorCursor(xw.dpy, cursor,
2030 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
2031 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
2032
2033 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
2034
2035 xresettitle();
2036 XMapWindow(xw.dpy, xw.win);
2037 xhints();
2038 XSync(xw.dpy, 0);
2039 }
2040
2041 void
2042 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
2043 int fg = base.fg, bg = base.bg, temp;
2044 int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
2045 Font *font = &dc.font;
2046 XGlyphInfo extents;
2047 int i;
2048
2049 /* only switch default fg/bg if term is in RV mode */
2050 if(IS_SET(MODE_REVERSE)) {
2051 if(fg == DefaultFG)
2052 fg = DefaultBG;
2053 if(bg == DefaultBG)
2054 bg = DefaultFG;
2055 }
2056
2057 if(base.mode & ATTR_REVERSE)
2058 temp = fg, fg = bg, bg = temp;
2059
2060 if(base.mode & ATTR_BOLD) {
2061 fg += 8;
2062 font = &dc.bfont;
2063 }
2064
2065 if(base.mode & ATTR_ITALIC)
2066 font = &dc.ifont;
2067 if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
2068 font = &dc.ibfont;
2069
2070 XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
2071 XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
2072
2073 if(base.mode & ATTR_GFX) {
2074 for(i = 0; i < bytelen; i++) {
2075 char c = gfx[(uint)s[i] % 256];
2076 if(c)
2077 s[i] = c;
2078 else if(s[i] > 0x5f)
2079 s[i] -= 0x5f;
2080 }
2081 }
2082
2083 XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen, &extents);
2084 width = extents.xOff;
2085 XftDrawRect(xw.xft_draw, &dc.xft_col[bg], winx, winy - font->ascent, width, xw.ch);
2086 XftDrawStringUtf8(xw.xft_draw, &dc.xft_col[fg], font->xft_set, winx, winy, (FcChar8 *)s, bytelen);
2087
2088 if(base.mode & ATTR_UNDERLINE)
2089 XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
2090 }
2091
2092 void
2093 xdrawcursor(void) {
2094 static int oldx = 0;
2095 static int oldy = 0;
2096 int sl;
2097 Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
2098
2099 LIMIT(oldx, 0, term.col-1);
2100 LIMIT(oldy, 0, term.row-1);
2101
2102 if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
2103 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
2104
2105 /* remove the old cursor */
2106 if(term.line[oldy][oldx].state & GLYPH_SET) {
2107 sl = utf8size(term.line[oldy][oldx].c);
2108 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
2109 } else
2110 xclear(oldx, oldy, oldx, oldy);
2111
2112 /* draw the new one */
2113 if(!(term.c.state & CURSOR_HIDE)) {
2114 if(!(xw.state & WIN_FOCUSED))
2115 g.bg = DefaultUCS;
2116
2117 if(IS_SET(MODE_REVERSE))
2118 g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
2119
2120 sl = utf8size(g.c);
2121 xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
2122 oldx = term.c.x, oldy = term.c.y;
2123 }
2124 }
2125
2126 void
2127 xresettitle(void) {
2128 XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
2129 }
2130
2131 void
2132 redraw(void) {
2133 struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
2134
2135 xclear(0, 0, xw.w, xw.h);
2136 tfulldirt();
2137 draw();
2138 XSync(xw.dpy, False); /* necessary for a good tput flash */
2139 nanosleep(&tv, NULL);
2140 }
2141
2142 void
2143 draw() {
2144 XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
2145
2146 drawregion(0, 0, term.col, term.row);
2147 XdbeSwapBuffers(xw.dpy, swpinfo, 1);
2148 }
2149
2150 void
2151 drawregion(int x1, int y1, int x2, int y2) {
2152 int ic, ib, x, y, ox, sl;
2153 Glyph base, new;
2154 char buf[DRAW_BUF_SIZ];
2155 bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
2156
2157 if((sel.alt && !alt) || (!sel.alt && alt))
2158 ena_sel = 0;
2159 if(!(xw.state & WIN_VISIBLE))
2160 return;
2161
2162 for(y = y1; y < y2; y++) {
2163 if(!term.dirty[y])
2164 continue;
2165 xclear(0, y, term.col, y);
2166 term.dirty[y] = 0;
2167 base = term.line[y][0];
2168 ic = ib = ox = 0;
2169 for(x = x1; x < x2; x++) {
2170 new = term.line[y][x];
2171 if(ena_sel && *(new.c) && selected(x, y))
2172 new.mode ^= ATTR_REVERSE;
2173 if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
2174 ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
2175 xdraws(buf, base, ox, y, ic, ib);
2176 ic = ib = 0;
2177 }
2178 if(new.state & GLYPH_SET) {
2179 if(ib == 0) {
2180 ox = x;
2181 base = new;
2182 }
2183 sl = utf8size(new.c);
2184 memcpy(buf+ib, new.c, sl);
2185 ib += sl;
2186 ++ic;
2187 }
2188 }
2189 if(ib > 0)
2190 xdraws(buf, base, ox, y, ic, ib);
2191 }
2192 xdrawcursor();
2193 }
2194
2195 void
2196 expose(XEvent *ev) {
2197 XExposeEvent *e = &ev->xexpose;
2198 if(xw.state & WIN_REDRAW) {
2199 if(!e->count)
2200 xw.state &= ~WIN_REDRAW;
2201 }
2202 }
2203
2204 void
2205 visibility(XEvent *ev) {
2206 XVisibilityEvent *e = &ev->xvisibility;
2207 if(e->state == VisibilityFullyObscured)
2208 xw.state &= ~WIN_VISIBLE;
2209 else if(!(xw.state & WIN_VISIBLE))
2210 /* need a full redraw for next Expose, not just a buf copy */
2211 xw.state |= WIN_VISIBLE | WIN_REDRAW;
2212 }
2213
2214 void
2215 unmap(XEvent *ev) {
2216 xw.state &= ~WIN_VISIBLE;
2217 }
2218
2219 void
2220 xseturgency(int add) {
2221 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
2222 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
2223 XSetWMHints(xw.dpy, xw.win, h);
2224 XFree(h);
2225 }
2226
2227 void
2228 focus(XEvent *ev) {
2229 if(ev->type == FocusIn) {
2230 xw.state |= WIN_FOCUSED;
2231 xseturgency(0);
2232 } else
2233 xw.state &= ~WIN_FOCUSED;
2234 }
2235
2236 char*
2237 kmap(KeySym k, uint state) {
2238 int i;
2239 state &= ~Mod2Mask;
2240 for(i = 0; i < LEN(key); i++) {
2241 uint mask = key[i].mask;
2242 if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
2243 return (char*)key[i].s;
2244 }
2245 return NULL;
2246 }
2247
2248 void
2249 kpress(XEvent *ev) {
2250 XKeyEvent *e = &ev->xkey;
2251 KeySym ksym;
2252 char buf[32];
2253 char *customkey;
2254 int len;
2255 int meta;
2256 int shift;
2257 Status status;
2258
2259 meta = e->state & Mod1Mask;
2260 shift = e->state & ShiftMask;
2261 len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
2262
2263 /* 1. custom keys from config.h */
2264 if((customkey = kmap(ksym, e->state)))
2265 ttywrite(customkey, strlen(customkey));
2266 /* 2. hardcoded (overrides X lookup) */
2267 else
2268 switch(ksym) {
2269 case XK_Up:
2270 case XK_Down:
2271 case XK_Left:
2272 case XK_Right:
2273 /* XXX: shift up/down doesn't work */
2274 sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
2275 ttywrite(buf, 3);
2276 break;
2277 case XK_Insert:
2278 if(shift)
2279 selpaste();
2280 break;
2281 case XK_Return:
2282 if(IS_SET(MODE_CRLF))
2283 ttywrite("\r\n", 2);
2284 else
2285 ttywrite("\r", 1);
2286 break;
2287 /* 3. X lookup */
2288 default:
2289 if(len > 0) {
2290 if(meta && len == 1)
2291 ttywrite("\033", 1);
2292 ttywrite(buf, len);
2293 }
2294 break;
2295 }
2296 }
2297
2298 void
2299 cmessage(XEvent *e) {
2300 /* See xembed specs
2301 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
2302 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
2303 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
2304 xw.state |= WIN_FOCUSED;
2305 xseturgency(0);
2306 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
2307 xw.state &= ~WIN_FOCUSED;
2308 }
2309 }
2310 }
2311
2312 void
2313 resize(XEvent *e) {
2314 int col, row;
2315
2316 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
2317 return;
2318
2319 xw.w = e->xconfigure.width;
2320 xw.h = e->xconfigure.height;
2321 col = (xw.w - 2*BORDER) / xw.cw;
2322 row = (xw.h - 2*BORDER) / xw.ch;
2323 if(col == term.col && row == term.row)
2324 return;
2325
2326 xclear(0, 0, xw.w, xw.h);
2327 tresize(col, row);
2328 xresize(col, row);
2329 ttyresize(col, row);
2330 }
2331
2332 void
2333 run(void) {
2334 XEvent ev;
2335 fd_set rfd;
2336 int xfd = XConnectionNumber(xw.dpy), i;
2337 struct timeval drawtimeout, *tv = NULL;
2338
2339 for(i = 0;; i++) {
2340 FD_ZERO(&rfd);
2341 FD_SET(cmdfd, &rfd);
2342 FD_SET(xfd, &rfd);
2343 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
2344 if(errno == EINTR)
2345 continue;
2346 die("select failed: %s\n", SERRNO);
2347 }
2348
2349 /*
2350 * Stop after a certain number of reads so the user does not
2351 * feel like the system is stuttering.
2352 */
2353 if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
2354 ttyread();
2355
2356 /*
2357 * Just wait a bit so it isn't disturbing the
2358 * user and the system is able to write something.
2359 */
2360 drawtimeout.tv_sec = 0;
2361 drawtimeout.tv_usec = 5;
2362 tv = &drawtimeout;
2363 continue;
2364 }
2365 i = 0;
2366 tv = NULL;
2367
2368 while(XPending(xw.dpy)) {
2369 XNextEvent(xw.dpy, &ev);
2370 if(XFilterEvent(&ev, xw.win))
2371 continue;
2372 if(handler[ev.type])
2373 (handler[ev.type])(&ev);
2374 }
2375
2376 draw();
2377 XFlush(xw.dpy);
2378 }
2379 }
2380
2381 int
2382 main(int argc, char *argv[]) {
2383 int i, bitm, xr, yr;
2384 unsigned int wr, hr;
2385
2386 xw.fw = xw.fh = xw.fx = xw.fy = 0;
2387 xw.isfixed = False;
2388
2389 for(i = 1; i < argc; i++) {
2390 switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
2391 case 't':
2392 if(++i < argc) opt_title = argv[i];
2393 break;
2394 case 'c':
2395 if(++i < argc) opt_class = argv[i];
2396 break;
2397 case 'w':
2398 if(++i < argc) opt_embed = argv[i];
2399 break;
2400 case 'f':
2401 if(++i < argc) opt_io = argv[i];
2402 break;
2403 case 'e':
2404 /* eat every remaining arguments */
2405 if(++i < argc) opt_cmd = &argv[i];
2406 goto run;
2407 case 'g':
2408 if(++i >= argc)
2409 break;
2410
2411 bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
2412 if(bitm & XValue)
2413 xw.fx = xr;
2414 if(bitm & YValue)
2415 xw.fy = yr;
2416 if(bitm & WidthValue)
2417 xw.fw = (int)wr;
2418 if(bitm & HeightValue)
2419 xw.fh = (int)hr;
2420 if(bitm & XNegative && xw.fx == 0)
2421 xw.fx = -1;
2422 if(bitm & XNegative && xw.fy == 0)
2423 xw.fy = -1;
2424
2425 if(xw.fh != 0 && xw.fw != 0)
2426 xw.isfixed = True;
2427 break;
2428 case 'v':
2429 default:
2430 die(USAGE);
2431 }
2432 }
2433
2434 run:
2435 setlocale(LC_CTYPE, "");
2436 tnew(80, 24);
2437 ttynew();
2438 xinit();
2439 selinit();
2440 run();
2441 return 0;
2442 }
2443