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