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[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.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 <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a)[0])
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f))
74 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
75 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
80 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
81
82 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
83 #define IS_TRUECOL(x) (1 << 24 & (x))
84 #define TRUERED(x) (((x) & 0xff0000) >> 8)
85 #define TRUEGREEN(x) (((x) & 0xff00))
86 #define TRUEBLUE(x) (((x) & 0xff) << 8)
87
88
89 #define VT102ID "\033[?6c"
90
91 enum glyph_attribute {
92 ATTR_NULL = 0,
93 ATTR_BOLD = 1,
94 ATTR_FAINT = 2,
95 ATTR_ITALIC = 4,
96 ATTR_UNDERLINE = 8,
97 ATTR_BLINK = 16,
98 ATTR_FASTBLINK = 32,
99 ATTR_REVERSE = 64,
100 ATTR_INVISIBLE = 128,
101 ATTR_STRUCK = 256,
102 ATTR_WRAP = 512,
103 ATTR_WIDE = 1024,
104 ATTR_WDUMMY = 2048,
105 };
106
107 enum cursor_movement {
108 CURSOR_SAVE,
109 CURSOR_LOAD
110 };
111
112 enum cursor_state {
113 CURSOR_DEFAULT = 0,
114 CURSOR_WRAPNEXT = 1,
115 CURSOR_ORIGIN = 2
116 };
117
118 enum term_mode {
119 MODE_WRAP = 1,
120 MODE_INSERT = 2,
121 MODE_APPKEYPAD = 4,
122 MODE_ALTSCREEN = 8,
123 MODE_CRLF = 16,
124 MODE_MOUSEBTN = 32,
125 MODE_MOUSEMOTION = 64,
126 MODE_REVERSE = 128,
127 MODE_KBDLOCK = 256,
128 MODE_HIDE = 512,
129 MODE_ECHO = 1024,
130 MODE_APPCURSOR = 2048,
131 MODE_MOUSESGR = 4096,
132 MODE_8BIT = 8192,
133 MODE_BLINK = 16384,
134 MODE_FBLINK = 32768,
135 MODE_FOCUS = 65536,
136 MODE_MOUSEX10 = 131072,
137 MODE_MOUSEMANY = 262144,
138 MODE_BRCKTPASTE = 524288,
139 MODE_PRINT = 1048576,
140 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
141 |MODE_MOUSEMANY,
142 };
143
144 enum charset {
145 CS_GRAPHIC0,
146 CS_GRAPHIC1,
147 CS_UK,
148 CS_USA,
149 CS_MULTI,
150 CS_GER,
151 CS_FIN
152 };
153
154 enum escape_state {
155 ESC_START = 1,
156 ESC_CSI = 2,
157 ESC_STR = 4, /* DCS, OSC, PM, APC */
158 ESC_ALTCHARSET = 8,
159 ESC_STR_END = 16, /* a final string was encountered */
160 ESC_TEST = 32, /* Enter in test mode */
161 };
162
163 enum window_state {
164 WIN_VISIBLE = 1,
165 WIN_REDRAW = 2,
166 WIN_FOCUSED = 4
167 };
168
169 enum selection_type {
170 SEL_REGULAR = 1,
171 SEL_RECTANGULAR = 2
172 };
173
174 enum selection_snap {
175 SNAP_WORD = 1,
176 SNAP_LINE = 2
177 };
178
179 typedef unsigned char uchar;
180 typedef unsigned int uint;
181 typedef unsigned long ulong;
182 typedef unsigned short ushort;
183
184 typedef XftDraw *Draw;
185 typedef XftColor Color;
186
187 typedef struct {
188 char c[UTF_SIZ]; /* character code */
189 ushort mode; /* attribute flags */
190 uint32_t fg; /* foreground */
191 uint32_t bg; /* background */
192 } Glyph;
193
194 typedef Glyph *Line;
195
196 typedef struct {
197 Glyph attr; /* current char attributes */
198 int x;
199 int y;
200 char state;
201 } TCursor;
202
203 /* CSI Escape sequence structs */
204 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
205 typedef struct {
206 char buf[ESC_BUF_SIZ]; /* raw string */
207 int len; /* raw string length */
208 char priv;
209 int arg[ESC_ARG_SIZ];
210 int narg; /* nb of args */
211 char mode;
212 } CSIEscape;
213
214 /* STR Escape sequence structs */
215 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
216 typedef struct {
217 char type; /* ESC type ... */
218 char buf[STR_BUF_SIZ]; /* raw string */
219 int len; /* raw string length */
220 char *args[STR_ARG_SIZ];
221 int narg; /* nb of args */
222 } STREscape;
223
224 /* Internal representation of the screen */
225 typedef struct {
226 int row; /* nb row */
227 int col; /* nb col */
228 Line *line; /* screen */
229 Line *alt; /* alternate screen */
230 bool *dirty; /* dirtyness of lines */
231 TCursor c; /* cursor */
232 int top; /* top scroll limit */
233 int bot; /* bottom scroll limit */
234 int mode; /* terminal mode flags */
235 int esc; /* escape state flags */
236 char trantbl[4]; /* charset table translation */
237 int charset; /* current charset */
238 int icharset; /* selected charset for sequence */
239 bool numlock; /* lock numbers in keyboard */
240 bool *tabs;
241 } Term;
242
243 /* Purely graphic info */
244 typedef struct {
245 Display *dpy;
246 Colormap cmap;
247 Window win;
248 Drawable buf;
249 Atom xembed, wmdeletewin, netwmname, netwmpid;
250 XIM xim;
251 XIC xic;
252 Draw draw;
253 Visual *vis;
254 XSetWindowAttributes attrs;
255 int scr;
256 bool isfixed; /* is fixed geometry? */
257 int l, t; /* left and top offset */
258 int gm; /* geometry mask */
259 int tw, th; /* tty width and height */
260 int w, h; /* window width and height */
261 int ch; /* char height */
262 int cw; /* char width */
263 char state; /* focus, redraw, visible */
264 } XWindow;
265
266 typedef struct {
267 uint b;
268 uint mask;
269 char *s;
270 } Mousekey;
271
272 typedef struct {
273 KeySym k;
274 uint mask;
275 char *s;
276 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
277 signed char appkey; /* application keypad */
278 signed char appcursor; /* application cursor */
279 signed char crlf; /* crlf mode */
280 } Key;
281
282 typedef struct {
283 int mode;
284 int type;
285 int snap;
286 /*
287 * Selection variables:
288 * nb – normalized coordinates of the beginning of the selection
289 * ne – normalized coordinates of the end of the selection
290 * ob – original coordinates of the beginning of the selection
291 * oe – original coordinates of the end of the selection
292 */
293 struct {
294 int x, y;
295 } nb, ne, ob, oe;
296
297 char *clip;
298 Atom xtarget;
299 bool alt;
300 struct timespec tclick1;
301 struct timespec tclick2;
302 } Selection;
303
304 typedef union {
305 int i;
306 uint ui;
307 float f;
308 const void *v;
309 } Arg;
310
311 typedef struct {
312 uint mod;
313 KeySym keysym;
314 void (*func)(const Arg *);
315 const Arg arg;
316 } Shortcut;
317
318 /* function definitions used in config.h */
319 static void clippaste(const Arg *);
320 static void numlock(const Arg *);
321 static void selpaste(const Arg *);
322 static void xzoom(const Arg *);
323 static void printsel(const Arg *);
324 static void printscreen(const Arg *) ;
325 static void toggleprinter(const Arg *);
326
327 /* Config.h for applying patches and the configuration. */
328 #include "config.h"
329
330 /* Font structure */
331 typedef struct {
332 int height;
333 int width;
334 int ascent;
335 int descent;
336 short lbearing;
337 short rbearing;
338 XftFont *match;
339 FcFontSet *set;
340 FcPattern *pattern;
341 } Font;
342
343 /* Drawing Context */
344 typedef struct {
345 Color col[MAX(LEN(colorname), 256)];
346 Font font, bfont, ifont, ibfont;
347 GC gc;
348 } DC;
349
350 static void die(const char *, ...);
351 static void draw(void);
352 static void redraw(int);
353 static void drawregion(int, int, int, int);
354 static void execsh(void);
355 static void sigchld(int);
356 static void run(void);
357
358 static void csidump(void);
359 static void csihandle(void);
360 static void csiparse(void);
361 static void csireset(void);
362 static void strdump(void);
363 static void strhandle(void);
364 static void strparse(void);
365 static void strreset(void);
366
367 static int tattrset(int);
368 static void tprinter(char *, size_t);
369 static void tdumpsel(void);
370 static void tdumpline(int);
371 static void tdump(void);
372 static void tclearregion(int, int, int, int);
373 static void tcursor(int);
374 static void tdeletechar(int);
375 static void tdeleteline(int);
376 static void tinsertblank(int);
377 static void tinsertblankline(int);
378 static void tmoveto(int, int);
379 static void tmoveato(int, int);
380 static void tnew(int, int);
381 static void tnewline(int);
382 static void tputtab(int);
383 static void tputc(char *, int);
384 static void treset(void);
385 static int tresize(int, int);
386 static void tscrollup(int, int);
387 static void tscrolldown(int, int);
388 static void tsetattr(int *, int);
389 static void tsetchar(char *, Glyph *, int, int);
390 static void tsetscroll(int, int);
391 static void tswapscreen(void);
392 static void tsetdirt(int, int);
393 static void tsetdirtattr(int);
394 static void tsetmode(bool, bool, int *, int);
395 static void tfulldirt(void);
396 static void techo(char *, int);
397 static void tcontrolcode(uchar );
398 static void tdectest(char );
399 static int32_t tdefcolor(int *, int *, int);
400 static void tdeftran(char);
401 static inline bool match(uint, uint);
402 static void ttynew(void);
403 static void ttyread(void);
404 static void ttyresize(void);
405 static void ttysend(char *, size_t);
406 static void ttywrite(const char *, size_t);
407
408 static void xdraws(char *, Glyph, int, int, int, int);
409 static void xhints(void);
410 static void xclear(int, int, int, int);
411 static void xdrawcursor(void);
412 static void xinit(void);
413 static void xloadcols(void);
414 static int xsetcolorname(int, const char *);
415 static int xgeommasktogravity(int);
416 static int xloadfont(Font *, FcPattern *);
417 static void xloadfonts(char *, double);
418 static int xloadfontset(Font *);
419 static void xsettitle(char *);
420 static void xresettitle(void);
421 static void xsetpointermotion(int);
422 static void xseturgency(int);
423 static void xsetsel(char *);
424 static void xtermclear(int, int, int, int);
425 static void xunloadfont(Font *);
426 static void xunloadfonts(void);
427 static void xresize(int, int);
428
429 static void expose(XEvent *);
430 static void visibility(XEvent *);
431 static void unmap(XEvent *);
432 static char *kmap(KeySym, uint);
433 static void kpress(XEvent *);
434 static void cmessage(XEvent *);
435 static void cresize(int, int);
436 static void resize(XEvent *);
437 static void focus(XEvent *);
438 static void brelease(XEvent *);
439 static void bpress(XEvent *);
440 static void bmotion(XEvent *);
441 static void selnotify(XEvent *);
442 static void selclear(XEvent *);
443 static void selrequest(XEvent *);
444
445 static void selinit(void);
446 static void selnormalize(void);
447 static inline bool selected(int, int);
448 static char *getsel(void);
449 static void selcopy(void);
450 static void selscroll(int, int);
451 static void selsnap(int, int *, int *, int);
452 static void getbuttoninfo(XEvent *);
453 static void mousereport(XEvent *);
454
455 static size_t utf8decode(char *, long *, size_t);
456 static long utf8decodebyte(char, size_t *);
457 static size_t utf8encode(long, char *, size_t);
458 static char utf8encodebyte(long, size_t);
459 static size_t utf8len(char *);
460 static size_t utf8validate(long *, size_t);
461
462 static ssize_t xwrite(int, const char *, size_t);
463 static void *xmalloc(size_t);
464 static void *xrealloc(void *, size_t);
465 static char *xstrdup(char *);
466
467 static void usage(void);
468
469 static void (*handler[LASTEvent])(XEvent *) = {
470 [KeyPress] = kpress,
471 [ClientMessage] = cmessage,
472 [ConfigureNotify] = resize,
473 [VisibilityNotify] = visibility,
474 [UnmapNotify] = unmap,
475 [Expose] = expose,
476 [FocusIn] = focus,
477 [FocusOut] = focus,
478 [MotionNotify] = bmotion,
479 [ButtonPress] = bpress,
480 [ButtonRelease] = brelease,
481 [SelectionClear] = selclear,
482 [SelectionNotify] = selnotify,
483 [SelectionRequest] = selrequest,
484 };
485
486 /* Globals */
487 static DC dc;
488 static XWindow xw;
489 static Term term;
490 static CSIEscape csiescseq;
491 static STREscape strescseq;
492 static int cmdfd;
493 static pid_t pid;
494 static Selection sel;
495 static int iofd = STDOUT_FILENO;
496 static char **opt_cmd = NULL;
497 static char *opt_io = NULL;
498 static char *opt_title = NULL;
499 static char *opt_embed = NULL;
500 static char *opt_class = NULL;
501 static char *opt_font = NULL;
502 static int oldbutton = 3; /* button event on startup: 3 = release */
503
504 static char *usedfont = NULL;
505 static double usedfontsize = 0;
506
507 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
508 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
509 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
510 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
511
512 /* Font Ring Cache */
513 enum {
514 FRC_NORMAL,
515 FRC_ITALIC,
516 FRC_BOLD,
517 FRC_ITALICBOLD
518 };
519
520 typedef struct {
521 XftFont *font;
522 int flags;
523 } Fontcache;
524
525 /* Fontcache is an array now. A new font will be appended to the array. */
526 static Fontcache frc[16];
527 static int frclen = 0;
528
529 ssize_t
530 xwrite(int fd, const char *s, size_t len) {
531 size_t aux = len;
532
533 while(len > 0) {
534 ssize_t r = write(fd, s, len);
535 if(r < 0)
536 return r;
537 len -= r;
538 s += r;
539 }
540 return aux;
541 }
542
543 void *
544 xmalloc(size_t len) {
545 void *p = malloc(len);
546
547 if(!p)
548 die("Out of memory\n");
549
550 return p;
551 }
552
553 void *
554 xrealloc(void *p, size_t len) {
555 if((p = realloc(p, len)) == NULL)
556 die("Out of memory\n");
557
558 return p;
559 }
560
561 char *
562 xstrdup(char *s) {
563 if((s = strdup(s)) == NULL)
564 die("Out of memory\n");
565
566 return s;
567 }
568
569 size_t
570 utf8decode(char *c, long *u, size_t clen) {
571 size_t i, j, len, type;
572 long udecoded;
573
574 *u = UTF_INVALID;
575 if(!clen)
576 return 0;
577 udecoded = utf8decodebyte(c[0], &len);
578 if(!BETWEEN(len, 1, UTF_SIZ))
579 return 1;
580 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
581 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
582 if(type != 0)
583 return j;
584 }
585 if(j < len)
586 return 0;
587 *u = udecoded;
588 utf8validate(u, len);
589 return len;
590 }
591
592 long
593 utf8decodebyte(char c, size_t *i) {
594 for(*i = 0; *i < LEN(utfmask); ++(*i))
595 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
596 return (uchar)c & ~utfmask[*i];
597 return 0;
598 }
599
600 size_t
601 utf8encode(long u, char *c, size_t clen) {
602 size_t len, i;
603
604 len = utf8validate(&u, 0);
605 if(clen < len)
606 return 0;
607 for(i = len - 1; i != 0; --i) {
608 c[i] = utf8encodebyte(u, 0);
609 u >>= 6;
610 }
611 c[0] = utf8encodebyte(u, len);
612 return len;
613 }
614
615 char
616 utf8encodebyte(long u, size_t i) {
617 return utfbyte[i] | (u & ~utfmask[i]);
618 }
619
620 size_t
621 utf8len(char *c) {
622 return utf8decode(c, &(long){0}, UTF_SIZ);
623 }
624
625 size_t
626 utf8validate(long *u, size_t i) {
627 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
628 *u = UTF_INVALID;
629 for(i = 1; *u > utfmax[i]; ++i)
630 ;
631 return i;
632 }
633
634 static void
635 selinit(void) {
636 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
637 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
638 sel.mode = 0;
639 sel.ob.x = -1;
640 sel.clip = NULL;
641 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
642 if(sel.xtarget == None)
643 sel.xtarget = XA_STRING;
644 }
645
646 static int
647 x2col(int x) {
648 x -= borderpx;
649 x /= xw.cw;
650
651 return LIMIT(x, 0, term.col-1);
652 }
653
654 static int
655 y2row(int y) {
656 y -= borderpx;
657 y /= xw.ch;
658
659 return LIMIT(y, 0, term.row-1);
660 }
661
662 static int tlinelen(int y) {
663 int i = term.col;
664
665 while (i > 0 && term.line[y][i - 1].c[0] == ' ')
666 --i;
667
668 return i;
669 }
670
671 static void
672 selnormalize(void) {
673 int i;
674
675 if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
676 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
677 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
678 } else {
679 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
680 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
681 }
682 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
683 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
684
685 /* expand selection over line breaks */
686 if (sel.type == SEL_RECTANGULAR)
687 return;
688 i = tlinelen(sel.nb.y);
689 if (i < sel.nb.x)
690 sel.nb.x = i;
691 if (tlinelen(sel.ne.y) <= sel.ne.x)
692 sel.ne.x = term.col - 1;
693 }
694
695 static inline bool
696 selected(int x, int y) {
697 if(sel.type == SEL_RECTANGULAR)
698 return BETWEEN(y, sel.nb.y, sel.ne.y)
699 && BETWEEN(x, sel.nb.x, sel.ne.x);
700
701 return BETWEEN(y, sel.nb.y, sel.ne.y)
702 && (y != sel.nb.y || x >= sel.nb.x)
703 && (y != sel.ne.y || x <= sel.ne.x);
704 }
705
706 void
707 selsnap(int mode, int *x, int *y, int direction) {
708 int newx, newy, xt, yt;
709 Glyph *gp;
710
711 switch(mode) {
712 case SNAP_WORD:
713 /*
714 * Snap around if the word wraps around at the end or
715 * beginning of a line.
716 */
717 for(;;) {
718 newx = *x + direction;
719 newy = *y;
720 if(!BETWEEN(newx, 0, term.col - 1)) {
721 newy += direction;
722 newx = (newx + term.col) % term.col;
723 if (!BETWEEN(newy, 0, term.row - 1))
724 break;
725
726 if(direction > 0)
727 yt = *y, xt = *x;
728 else
729 yt = newy, xt = newx;
730 if(!(term.line[yt][xt].mode & ATTR_WRAP))
731 break;
732 }
733
734 if (newx >= tlinelen(newy))
735 break;
736
737 gp = &term.line[newy][newx];
738 if (!(gp->mode & ATTR_WDUMMY) && strchr(worddelimiters, gp->c[0]))
739 break;
740
741 *x = newx;
742 *y = newy;
743 }
744 break;
745 case SNAP_LINE:
746 /*
747 * Snap around if the the previous line or the current one
748 * has set ATTR_WRAP at its end. Then the whole next or
749 * previous line will be selected.
750 */
751 *x = (direction < 0) ? 0 : term.col - 1;
752 if(direction < 0 && *y > 0) {
753 for(; *y > 0; *y += direction) {
754 if(!(term.line[*y-1][term.col-1].mode
755 & ATTR_WRAP)) {
756 break;
757 }
758 }
759 } else if(direction > 0 && *y < term.row-1) {
760 for(; *y < term.row; *y += direction) {
761 if(!(term.line[*y][term.col-1].mode
762 & ATTR_WRAP)) {
763 break;
764 }
765 }
766 }
767 break;
768 }
769 }
770
771 void
772 getbuttoninfo(XEvent *e) {
773 int type;
774 uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
775
776 sel.alt = IS_SET(MODE_ALTSCREEN);
777
778 sel.oe.x = x2col(e->xbutton.x);
779 sel.oe.y = y2row(e->xbutton.y);
780
781 if(sel.ob.y < sel.oe.y
782 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
783 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
784 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
785 } else {
786 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
787 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
788 }
789 selnormalize();
790
791 sel.type = SEL_REGULAR;
792 for(type = 1; type < LEN(selmasks); ++type) {
793 if(match(selmasks[type], state)) {
794 sel.type = type;
795 break;
796 }
797 }
798 }
799
800 void
801 mousereport(XEvent *e) {
802 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
803 button = e->xbutton.button, state = e->xbutton.state,
804 len;
805 char buf[40];
806 static int ox, oy;
807
808 /* from urxvt */
809 if(e->xbutton.type == MotionNotify) {
810 if(x == ox && y == oy)
811 return;
812 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
813 return;
814 /* MOUSE_MOTION: no reporting if no button is pressed */
815 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
816 return;
817
818 button = oldbutton + 32;
819 ox = x;
820 oy = y;
821 } else {
822 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
823 button = 3;
824 } else {
825 button -= Button1;
826 if(button >= 3)
827 button += 64 - 3;
828 }
829 if(e->xbutton.type == ButtonPress) {
830 oldbutton = button;
831 ox = x;
832 oy = y;
833 } else if(e->xbutton.type == ButtonRelease) {
834 oldbutton = 3;
835 /* MODE_MOUSEX10: no button release reporting */
836 if(IS_SET(MODE_MOUSEX10))
837 return;
838 if (button == 64 || button == 65)
839 return;
840 }
841 }
842
843 if(!IS_SET(MODE_MOUSEX10)) {
844 button += (state & ShiftMask ? 4 : 0)
845 + (state & Mod4Mask ? 8 : 0)
846 + (state & ControlMask ? 16 : 0);
847 }
848
849 len = 0;
850 if(IS_SET(MODE_MOUSESGR)) {
851 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
852 button, x+1, y+1,
853 e->xbutton.type == ButtonRelease ? 'm' : 'M');
854 } else if(x < 223 && y < 223) {
855 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
856 32+button, 32+x+1, 32+y+1);
857 } else {
858 return;
859 }
860
861 ttywrite(buf, len);
862 }
863
864 void
865 bpress(XEvent *e) {
866 struct timespec now;
867 Mousekey *mk;
868
869 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
870 mousereport(e);
871 return;
872 }
873
874 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
875 if(e->xbutton.button == mk->b
876 && match(mk->mask, e->xbutton.state)) {
877 ttysend(mk->s, strlen(mk->s));
878 return;
879 }
880 }
881
882 if(e->xbutton.button == Button1) {
883 clock_gettime(CLOCK_MONOTONIC, &now);
884
885 /* Clear previous selection, logically and visually. */
886 selclear(NULL);
887 sel.mode = 1;
888 sel.type = SEL_REGULAR;
889 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
890 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
891
892 /*
893 * If the user clicks below predefined timeouts specific
894 * snapping behaviour is exposed.
895 */
896 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
897 sel.snap = SNAP_LINE;
898 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
899 sel.snap = SNAP_WORD;
900 } else {
901 sel.snap = 0;
902 }
903 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
904 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
905 selnormalize();
906
907 /*
908 * Draw selection, unless it's regular and we don't want to
909 * make clicks visible
910 */
911 if(sel.snap != 0) {
912 sel.mode++;
913 tsetdirt(sel.nb.y, sel.ne.y);
914 }
915 sel.tclick2 = sel.tclick1;
916 sel.tclick1 = now;
917 }
918 }
919
920 char *
921 getsel(void) {
922 char *str, *ptr;
923 int x, y, bufsize, size, ex;
924 Glyph *gp, *last;
925
926 if(sel.ob.x == -1)
927 return NULL;
928
929 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
930 ptr = str = xmalloc(bufsize);
931
932 /* append every set & selected glyph to the selection */
933 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
934 gp = &term.line[y][0];
935 last = &gp[term.col-1];
936
937 while(last >= gp && !(selected(last - gp, y) &&
938 strcmp(last->c, " ") != 0)) {
939 --last;
940 }
941
942 for(x = 0; gp <= last; x++, ++gp) {
943 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
944 continue;
945
946 size = utf8len(gp->c);
947 memcpy(ptr, gp->c, size);
948 ptr += size;
949 }
950
951 /*
952 * Copy and pasting of line endings is inconsistent
953 * in the inconsistent terminal and GUI world.
954 * The best solution seems like to produce '\n' when
955 * something is copied from st and convert '\n' to
956 * '\r', when something to be pasted is received by
957 * st.
958 * FIXME: Fix the computer world.
959 */
960 if(y < sel.ne.y && !(x > 0 && (gp-1)->mode & ATTR_WRAP))
961 *ptr++ = '\n';
962
963 /*
964 * If the last selected line expands in the selection
965 * after the visible text '\n' is appended.
966 */
967 if(y == sel.ne.y) {
968 ex = sel.ne.x;
969 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
970 ex = sel.nb.x;
971 if(tlinelen(y) < ex)
972 *ptr++ = '\n';
973 }
974 }
975 *ptr = 0;
976 return str;
977 }
978
979 void
980 selcopy(void) {
981 xsetsel(getsel());
982 }
983
984 void
985 selnotify(XEvent *e) {
986 ulong nitems, ofs, rem;
987 int format;
988 uchar *data, *last, *repl;
989 Atom type;
990
991 ofs = 0;
992 do {
993 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
994 False, AnyPropertyType, &type, &format,
995 &nitems, &rem, &data)) {
996 fprintf(stderr, "Clipboard allocation failed\n");
997 return;
998 }
999
1000 /*
1001 * As seen in getsel:
1002 * Line endings are inconsistent in the terminal and GUI world
1003 * copy and pasting. When receiving some selection data,
1004 * replace all '\n' with '\r'.
1005 * FIXME: Fix the computer world.
1006 */
1007 repl = data;
1008 last = data + nitems * format / 8;
1009 while((repl = memchr(repl, '\n', last - repl))) {
1010 *repl++ = '\r';
1011 }
1012
1013 if(IS_SET(MODE_BRCKTPASTE))
1014 ttywrite("\033[200~", 6);
1015 ttysend((char *)data, nitems * format / 8);
1016 if(IS_SET(MODE_BRCKTPASTE))
1017 ttywrite("\033[201~", 6);
1018 XFree(data);
1019 /* number of 32-bit chunks returned */
1020 ofs += nitems * format / 32;
1021 } while(rem > 0);
1022 }
1023
1024 void
1025 selpaste(const Arg *dummy) {
1026 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1027 xw.win, CurrentTime);
1028 }
1029
1030 void
1031 clippaste(const Arg *dummy) {
1032 Atom clipboard;
1033
1034 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1035 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1036 xw.win, CurrentTime);
1037 }
1038
1039 void
1040 selclear(XEvent *e) {
1041 if(sel.ob.x == -1)
1042 return;
1043 sel.ob.x = -1;
1044 tsetdirt(sel.nb.y, sel.ne.y);
1045 }
1046
1047 void
1048 selrequest(XEvent *e) {
1049 XSelectionRequestEvent *xsre;
1050 XSelectionEvent xev;
1051 Atom xa_targets, string;
1052
1053 xsre = (XSelectionRequestEvent *) e;
1054 xev.type = SelectionNotify;
1055 xev.requestor = xsre->requestor;
1056 xev.selection = xsre->selection;
1057 xev.target = xsre->target;
1058 xev.time = xsre->time;
1059 /* reject */
1060 xev.property = None;
1061
1062 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1063 if(xsre->target == xa_targets) {
1064 /* respond with the supported type */
1065 string = sel.xtarget;
1066 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1067 XA_ATOM, 32, PropModeReplace,
1068 (uchar *) &string, 1);
1069 xev.property = xsre->property;
1070 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1071 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1072 xsre->target, 8, PropModeReplace,
1073 (uchar *) sel.clip, strlen(sel.clip));
1074 xev.property = xsre->property;
1075 }
1076
1077 /* all done, send a notification to the listener */
1078 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1079 fprintf(stderr, "Error sending SelectionNotify event\n");
1080 }
1081
1082 void
1083 xsetsel(char *str) {
1084 /* register the selection for both the clipboard and the primary */
1085 Atom clipboard;
1086
1087 free(sel.clip);
1088 sel.clip = str;
1089
1090 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1091
1092 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1093 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1094 }
1095
1096 void
1097 brelease(XEvent *e) {
1098 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1099 mousereport(e);
1100 return;
1101 }
1102
1103 if(e->xbutton.button == Button2) {
1104 selpaste(NULL);
1105 } else if(e->xbutton.button == Button1) {
1106 if(sel.mode < 2) {
1107 selclear(NULL);
1108 } else {
1109 getbuttoninfo(e);
1110 selcopy();
1111 }
1112 sel.mode = 0;
1113 tsetdirt(sel.nb.y, sel.ne.y);
1114 }
1115 }
1116
1117 void
1118 bmotion(XEvent *e) {
1119 int oldey, oldex, oldsby, oldsey;
1120
1121 if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
1122 mousereport(e);
1123 return;
1124 }
1125
1126 if(!sel.mode)
1127 return;
1128
1129 sel.mode++;
1130 oldey = sel.oe.y;
1131 oldex = sel.oe.x;
1132 oldsby = sel.nb.y;
1133 oldsey = sel.ne.y;
1134 getbuttoninfo(e);
1135
1136 if(oldey != sel.oe.y || oldex != sel.oe.x)
1137 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1138 }
1139
1140 void
1141 die(const char *errstr, ...) {
1142 va_list ap;
1143
1144 va_start(ap, errstr);
1145 vfprintf(stderr, errstr, ap);
1146 va_end(ap);
1147 exit(EXIT_FAILURE);
1148 }
1149
1150 void
1151 execsh(void) {
1152 char **args;
1153 char *envshell = getenv("SHELL");
1154 const struct passwd *pass = getpwuid(getuid());
1155 char buf[sizeof(long) * 8 + 1];
1156
1157 unsetenv("COLUMNS");
1158 unsetenv("LINES");
1159 unsetenv("TERMCAP");
1160
1161 if(pass) {
1162 setenv("LOGNAME", pass->pw_name, 1);
1163 setenv("USER", pass->pw_name, 1);
1164 setenv("SHELL", pass->pw_shell, 0);
1165 setenv("HOME", pass->pw_dir, 0);
1166 }
1167
1168 snprintf(buf, sizeof(buf), "%lu", xw.win);
1169 setenv("WINDOWID", buf, 1);
1170
1171 signal(SIGCHLD, SIG_DFL);
1172 signal(SIGHUP, SIG_DFL);
1173 signal(SIGINT, SIG_DFL);
1174 signal(SIGQUIT, SIG_DFL);
1175 signal(SIGTERM, SIG_DFL);
1176 signal(SIGALRM, SIG_DFL);
1177
1178 DEFAULT(envshell, shell);
1179 setenv("TERM", termname, 1);
1180 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1181 execvp(args[0], args);
1182 exit(EXIT_FAILURE);
1183 }
1184
1185 void
1186 sigchld(int a) {
1187 int stat = 0;
1188
1189 if(waitpid(pid, &stat, 0) < 0)
1190 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1191
1192 if(WIFEXITED(stat)) {
1193 exit(WEXITSTATUS(stat));
1194 } else {
1195 exit(EXIT_FAILURE);
1196 }
1197 }
1198
1199 void
1200 ttynew(void) {
1201 int m, s;
1202 struct winsize w = {term.row, term.col, 0, 0};
1203
1204 /* seems to work fine on linux, openbsd and freebsd */
1205 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1206 die("openpty failed: %s\n", strerror(errno));
1207
1208 switch(pid = fork()) {
1209 case -1:
1210 die("fork failed\n");
1211 break;
1212 case 0:
1213 setsid(); /* create a new process group */
1214 dup2(s, STDIN_FILENO);
1215 dup2(s, STDOUT_FILENO);
1216 dup2(s, STDERR_FILENO);
1217 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1218 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1219 close(s);
1220 close(m);
1221 execsh();
1222 break;
1223 default:
1224 close(s);
1225 cmdfd = m;
1226 signal(SIGCHLD, sigchld);
1227 if(opt_io) {
1228 term.mode |= MODE_PRINT;
1229 iofd = (!strcmp(opt_io, "-")) ?
1230 STDOUT_FILENO :
1231 open(opt_io, O_WRONLY | O_CREAT, 0666);
1232 if(iofd < 0) {
1233 fprintf(stderr, "Error opening %s:%s\n",
1234 opt_io, strerror(errno));
1235 }
1236 }
1237 break;
1238 }
1239 }
1240
1241 void
1242 ttyread(void) {
1243 static char buf[BUFSIZ];
1244 static int buflen = 0;
1245 char *ptr;
1246 char s[UTF_SIZ];
1247 int charsize; /* size of utf8 char in bytes */
1248 long unicodep;
1249 int ret;
1250
1251 /* append read bytes to unprocessed bytes */
1252 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1253 die("Couldn't read from shell: %s\n", strerror(errno));
1254
1255 /* process every complete utf8 char */
1256 buflen += ret;
1257 ptr = buf;
1258 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1259 utf8encode(unicodep, s, UTF_SIZ);
1260 tputc(s, charsize);
1261 ptr += charsize;
1262 buflen -= charsize;
1263 }
1264
1265 /* keep any uncomplete utf8 char for the next call */
1266 memmove(buf, ptr, buflen);
1267 }
1268
1269 void
1270 ttywrite(const char *s, size_t n) {
1271 if(xwrite(cmdfd, s, n) == -1)
1272 die("write error on tty: %s\n", strerror(errno));
1273 }
1274
1275 void
1276 ttysend(char *s, size_t n) {
1277 ttywrite(s, n);
1278 if(IS_SET(MODE_ECHO))
1279 techo(s, n);
1280 }
1281
1282 void
1283 ttyresize(void) {
1284 struct winsize w;
1285
1286 w.ws_row = term.row;
1287 w.ws_col = term.col;
1288 w.ws_xpixel = xw.tw;
1289 w.ws_ypixel = xw.th;
1290 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1291 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1292 }
1293
1294 int
1295 tattrset(int attr) {
1296 int i, j;
1297
1298 for(i = 0; i < term.row-1; i++) {
1299 for(j = 0; j < term.col-1; j++) {
1300 if(term.line[i][j].mode & attr)
1301 return 1;
1302 }
1303 }
1304
1305 return 0;
1306 }
1307
1308 void
1309 tsetdirt(int top, int bot) {
1310 int i;
1311
1312 LIMIT(top, 0, term.row-1);
1313 LIMIT(bot, 0, term.row-1);
1314
1315 for(i = top; i <= bot; i++)
1316 term.dirty[i] = 1;
1317 }
1318
1319 void
1320 tsetdirtattr(int attr) {
1321 int i, j;
1322
1323 for(i = 0; i < term.row-1; i++) {
1324 for(j = 0; j < term.col-1; j++) {
1325 if(term.line[i][j].mode & attr) {
1326 tsetdirt(i, i);
1327 break;
1328 }
1329 }
1330 }
1331 }
1332
1333 void
1334 tfulldirt(void) {
1335 tsetdirt(0, term.row-1);
1336 }
1337
1338 void
1339 tcursor(int mode) {
1340 static TCursor c[2];
1341 bool alt = IS_SET(MODE_ALTSCREEN);
1342
1343 if(mode == CURSOR_SAVE) {
1344 c[alt] = term.c;
1345 } else if(mode == CURSOR_LOAD) {
1346 term.c = c[alt];
1347 tmoveto(c[alt].x, c[alt].y);
1348 }
1349 }
1350
1351 void
1352 treset(void) {
1353 uint i;
1354
1355 term.c = (TCursor){{
1356 .mode = ATTR_NULL,
1357 .fg = defaultfg,
1358 .bg = defaultbg
1359 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1360
1361 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1362 for(i = tabspaces; i < term.col; i += tabspaces)
1363 term.tabs[i] = 1;
1364 term.top = 0;
1365 term.bot = term.row - 1;
1366 term.mode = MODE_WRAP;
1367 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1368 term.charset = 0;
1369
1370 tclearregion(0, 0, term.col-1, term.row-1);
1371 tmoveto(0, 0);
1372 tcursor(CURSOR_SAVE);
1373 }
1374
1375 void
1376 tnew(int col, int row) {
1377 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1378 tresize(col, row);
1379 term.numlock = 1;
1380
1381 treset();
1382 }
1383
1384 void
1385 tswapscreen(void) {
1386 Line *tmp = term.line;
1387
1388 term.line = term.alt;
1389 term.alt = tmp;
1390 term.mode ^= MODE_ALTSCREEN;
1391 tfulldirt();
1392 }
1393
1394 void
1395 tscrolldown(int orig, int n) {
1396 int i;
1397 Line temp;
1398
1399 LIMIT(n, 0, term.bot-orig+1);
1400
1401 tsetdirt(orig, term.bot-n);
1402 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1403
1404 for(i = term.bot; i >= orig+n; i--) {
1405 temp = term.line[i];
1406 term.line[i] = term.line[i-n];
1407 term.line[i-n] = temp;
1408 }
1409
1410 selscroll(orig, n);
1411 }
1412
1413 void
1414 tscrollup(int orig, int n) {
1415 int i;
1416 Line temp;
1417
1418 LIMIT(n, 0, term.bot-orig+1);
1419
1420 tclearregion(0, orig, term.col-1, orig+n-1);
1421 tsetdirt(orig+n, term.bot);
1422
1423 for(i = orig; i <= term.bot-n; i++) {
1424 temp = term.line[i];
1425 term.line[i] = term.line[i+n];
1426 term.line[i+n] = temp;
1427 }
1428
1429 selscroll(orig, -n);
1430 }
1431
1432 void
1433 selscroll(int orig, int n) {
1434 if(sel.ob.x == -1)
1435 return;
1436
1437 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1438 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1439 selclear(NULL);
1440 return;
1441 }
1442 if(sel.type == SEL_RECTANGULAR) {
1443 if(sel.ob.y < term.top)
1444 sel.ob.y = term.top;
1445 if(sel.oe.y > term.bot)
1446 sel.oe.y = term.bot;
1447 } else {
1448 if(sel.ob.y < term.top) {
1449 sel.ob.y = term.top;
1450 sel.ob.x = 0;
1451 }
1452 if(sel.oe.y > term.bot) {
1453 sel.oe.y = term.bot;
1454 sel.oe.x = term.col;
1455 }
1456 }
1457 selnormalize();
1458 }
1459 }
1460
1461 void
1462 tnewline(int first_col) {
1463 int y = term.c.y;
1464
1465 if(y == term.bot) {
1466 tscrollup(term.top, 1);
1467 } else {
1468 y++;
1469 }
1470 tmoveto(first_col ? 0 : term.c.x, y);
1471 }
1472
1473 void
1474 csiparse(void) {
1475 char *p = csiescseq.buf, *np;
1476 long int v;
1477
1478 csiescseq.narg = 0;
1479 if(*p == '?') {
1480 csiescseq.priv = 1;
1481 p++;
1482 }
1483
1484 csiescseq.buf[csiescseq.len] = '\0';
1485 while(p < csiescseq.buf+csiescseq.len) {
1486 np = NULL;
1487 v = strtol(p, &np, 10);
1488 if(np == p)
1489 v = 0;
1490 if(v == LONG_MAX || v == LONG_MIN)
1491 v = -1;
1492 csiescseq.arg[csiescseq.narg++] = v;
1493 p = np;
1494 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1495 break;
1496 p++;
1497 }
1498 csiescseq.mode = *p;
1499 }
1500
1501 /* for absolute user moves, when decom is set */
1502 void
1503 tmoveato(int x, int y) {
1504 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1505 }
1506
1507 void
1508 tmoveto(int x, int y) {
1509 int miny, maxy;
1510
1511 if(term.c.state & CURSOR_ORIGIN) {
1512 miny = term.top;
1513 maxy = term.bot;
1514 } else {
1515 miny = 0;
1516 maxy = term.row - 1;
1517 }
1518 LIMIT(x, 0, term.col-1);
1519 LIMIT(y, miny, maxy);
1520 term.c.state &= ~CURSOR_WRAPNEXT;
1521 term.c.x = x;
1522 term.c.y = y;
1523 }
1524
1525 void
1526 tsetchar(char *c, Glyph *attr, int x, int y) {
1527 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1528 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1529 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1530 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1531 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1532 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1533 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1534 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1535 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1536 };
1537
1538 /*
1539 * The table is proudly stolen from rxvt.
1540 */
1541 if(term.trantbl[term.charset] == CS_GRAPHIC0) {
1542 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1543 c = vt100_0[c[0] - 0x41];
1544 }
1545 }
1546
1547 if(term.line[y][x].mode & ATTR_WIDE) {
1548 if(x+1 < term.col) {
1549 term.line[y][x+1].c[0] = ' ';
1550 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1551 }
1552 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1553 term.line[y][x-1].c[0] = ' ';
1554 term.line[y][x-1].mode &= ~ATTR_WIDE;
1555 }
1556
1557 term.dirty[y] = 1;
1558 term.line[y][x] = *attr;
1559 memcpy(term.line[y][x].c, c, UTF_SIZ);
1560 }
1561
1562 void
1563 tclearregion(int x1, int y1, int x2, int y2) {
1564 int x, y, temp;
1565
1566 if(x1 > x2)
1567 temp = x1, x1 = x2, x2 = temp;
1568 if(y1 > y2)
1569 temp = y1, y1 = y2, y2 = temp;
1570
1571 LIMIT(x1, 0, term.col-1);
1572 LIMIT(x2, 0, term.col-1);
1573 LIMIT(y1, 0, term.row-1);
1574 LIMIT(y2, 0, term.row-1);
1575
1576 for(y = y1; y <= y2; y++) {
1577 term.dirty[y] = 1;
1578 for(x = x1; x <= x2; x++) {
1579 if(selected(x, y))
1580 selclear(NULL);
1581 term.line[y][x] = term.c.attr;
1582 memcpy(term.line[y][x].c, " ", 2);
1583 }
1584 }
1585 }
1586
1587 void
1588 tdeletechar(int n) {
1589 int dst, src, size;
1590 Glyph *line;
1591
1592 LIMIT(n, 0, term.col - term.c.x);
1593
1594 dst = term.c.x;
1595 src = term.c.x + n;
1596 size = term.col - src;
1597 line = term.line[term.c.y];
1598
1599 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1600 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1601 }
1602
1603 void
1604 tinsertblank(int n) {
1605 int dst, src, size;
1606 Glyph *line;
1607
1608 LIMIT(n, 0, term.col - term.c.x);
1609
1610 dst = term.c.x + n;
1611 src = term.c.x;
1612 size = term.col - dst;
1613 line = term.line[term.c.y];
1614
1615 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1616 tclearregion(src, term.c.y, dst - 1, term.c.y);
1617 }
1618
1619 void
1620 tinsertblankline(int n) {
1621 if(BETWEEN(term.c.y, term.top, term.bot))
1622 tscrolldown(term.c.y, n);
1623 }
1624
1625 void
1626 tdeleteline(int n) {
1627 if(BETWEEN(term.c.y, term.top, term.bot))
1628 tscrollup(term.c.y, n);
1629 }
1630
1631 int32_t
1632 tdefcolor(int *attr, int *npar, int l) {
1633 int32_t idx = -1;
1634 uint r, g, b;
1635
1636 switch (attr[*npar + 1]) {
1637 case 2: /* direct color in RGB space */
1638 if (*npar + 4 >= l) {
1639 fprintf(stderr,
1640 "erresc(38): Incorrect number of parameters (%d)\n",
1641 *npar);
1642 break;
1643 }
1644 r = attr[*npar + 2];
1645 g = attr[*npar + 3];
1646 b = attr[*npar + 4];
1647 *npar += 4;
1648 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1649 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1650 r, g, b);
1651 else
1652 idx = TRUECOLOR(r, g, b);
1653 break;
1654 case 5: /* indexed color */
1655 if (*npar + 2 >= l) {
1656 fprintf(stderr,
1657 "erresc(38): Incorrect number of parameters (%d)\n",
1658 *npar);
1659 break;
1660 }
1661 *npar += 2;
1662 if(!BETWEEN(attr[*npar], 0, 255))
1663 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1664 else
1665 idx = attr[*npar];
1666 break;
1667 case 0: /* implemented defined (only foreground) */
1668 case 1: /* transparent */
1669 case 3: /* direct color in CMY space */
1670 case 4: /* direct color in CMYK space */
1671 default:
1672 fprintf(stderr,
1673 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1674 break;
1675 }
1676
1677 return idx;
1678 }
1679
1680 void
1681 tsetattr(int *attr, int l) {
1682 int i;
1683 int32_t idx;
1684
1685 for(i = 0; i < l; i++) {
1686 switch(attr[i]) {
1687 case 0:
1688 term.c.attr.mode &= ~(
1689 ATTR_BOLD |
1690 ATTR_FAINT |
1691 ATTR_ITALIC |
1692 ATTR_UNDERLINE |
1693 ATTR_BLINK |
1694 ATTR_FASTBLINK |
1695 ATTR_REVERSE |
1696 ATTR_INVISIBLE |
1697 ATTR_STRUCK );
1698 term.c.attr.fg = defaultfg;
1699 term.c.attr.bg = defaultbg;
1700 break;
1701 case 1:
1702 term.c.attr.mode |= ATTR_BOLD;
1703 break;
1704 case 2:
1705 term.c.attr.mode |= ATTR_FAINT;
1706 break;
1707 case 3:
1708 term.c.attr.mode |= ATTR_ITALIC;
1709 break;
1710 case 4:
1711 term.c.attr.mode |= ATTR_UNDERLINE;
1712 break;
1713 case 5: /* slow blink */
1714 term.c.attr.mode |= ATTR_BLINK;
1715 break;
1716 case 6: /* rapid blink */
1717 term.c.attr.mode |= ATTR_FASTBLINK;
1718 break;
1719 case 7:
1720 term.c.attr.mode |= ATTR_REVERSE;
1721 break;
1722 case 8:
1723 term.c.attr.mode |= ATTR_INVISIBLE;
1724 break;
1725 case 9:
1726 term.c.attr.mode |= ATTR_STRUCK;
1727 break;
1728 case 21:
1729 term.c.attr.mode &= ~ATTR_BOLD;
1730 break;
1731 case 22:
1732 term.c.attr.mode &= ~ATTR_FAINT;
1733 break;
1734 case 23:
1735 term.c.attr.mode &= ~ATTR_ITALIC;
1736 break;
1737 case 24:
1738 term.c.attr.mode &= ~ATTR_UNDERLINE;
1739 break;
1740 case 25:
1741 term.c.attr.mode &= ~ATTR_BLINK;
1742 break;
1743 case 26:
1744 term.c.attr.mode &= ~ATTR_FASTBLINK;
1745 break;
1746 case 27:
1747 term.c.attr.mode &= ~ATTR_REVERSE;
1748 break;
1749 case 28:
1750 term.c.attr.mode &= ~ATTR_INVISIBLE;
1751 break;
1752 case 29:
1753 term.c.attr.mode &= ~ATTR_STRUCK;
1754 break;
1755 case 38:
1756 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1757 term.c.attr.fg = idx;
1758 break;
1759 case 39:
1760 term.c.attr.fg = defaultfg;
1761 break;
1762 case 48:
1763 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1764 term.c.attr.bg = idx;
1765 break;
1766 case 49:
1767 term.c.attr.bg = defaultbg;
1768 break;
1769 default:
1770 if(BETWEEN(attr[i], 30, 37)) {
1771 term.c.attr.fg = attr[i] - 30;
1772 } else if(BETWEEN(attr[i], 40, 47)) {
1773 term.c.attr.bg = attr[i] - 40;
1774 } else if(BETWEEN(attr[i], 90, 97)) {
1775 term.c.attr.fg = attr[i] - 90 + 8;
1776 } else if(BETWEEN(attr[i], 100, 107)) {
1777 term.c.attr.bg = attr[i] - 100 + 8;
1778 } else {
1779 fprintf(stderr,
1780 "erresc(default): gfx attr %d unknown\n",
1781 attr[i]), csidump();
1782 }
1783 break;
1784 }
1785 }
1786 }
1787
1788 void
1789 tsetscroll(int t, int b) {
1790 int temp;
1791
1792 LIMIT(t, 0, term.row-1);
1793 LIMIT(b, 0, term.row-1);
1794 if(t > b) {
1795 temp = t;
1796 t = b;
1797 b = temp;
1798 }
1799 term.top = t;
1800 term.bot = b;
1801 }
1802
1803 void
1804 tsetmode(bool priv, bool set, int *args, int narg) {
1805 int *lim, mode;
1806 bool alt;
1807
1808 for(lim = args + narg; args < lim; ++args) {
1809 if(priv) {
1810 switch(*args) {
1811 case 1: /* DECCKM -- Cursor key */
1812 MODBIT(term.mode, set, MODE_APPCURSOR);
1813 break;
1814 case 5: /* DECSCNM -- Reverse video */
1815 mode = term.mode;
1816 MODBIT(term.mode, set, MODE_REVERSE);
1817 if(mode != term.mode)
1818 redraw(REDRAW_TIMEOUT);
1819 break;
1820 case 6: /* DECOM -- Origin */
1821 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1822 tmoveato(0, 0);
1823 break;
1824 case 7: /* DECAWM -- Auto wrap */
1825 MODBIT(term.mode, set, MODE_WRAP);
1826 break;
1827 case 0: /* Error (IGNORED) */
1828 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1829 case 3: /* DECCOLM -- Column (IGNORED) */
1830 case 4: /* DECSCLM -- Scroll (IGNORED) */
1831 case 8: /* DECARM -- Auto repeat (IGNORED) */
1832 case 18: /* DECPFF -- Printer feed (IGNORED) */
1833 case 19: /* DECPEX -- Printer extent (IGNORED) */
1834 case 42: /* DECNRCM -- National characters (IGNORED) */
1835 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1836 break;
1837 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1838 MODBIT(term.mode, !set, MODE_HIDE);
1839 break;
1840 case 9: /* X10 mouse compatibility mode */
1841 xsetpointermotion(0);
1842 MODBIT(term.mode, 0, MODE_MOUSE);
1843 MODBIT(term.mode, set, MODE_MOUSEX10);
1844 break;
1845 case 1000: /* 1000: report button press */
1846 xsetpointermotion(0);
1847 MODBIT(term.mode, 0, MODE_MOUSE);
1848 MODBIT(term.mode, set, MODE_MOUSEBTN);
1849 break;
1850 case 1002: /* 1002: report motion on button press */
1851 xsetpointermotion(0);
1852 MODBIT(term.mode, 0, MODE_MOUSE);
1853 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1854 break;
1855 case 1003: /* 1003: enable all mouse motions */
1856 xsetpointermotion(set);
1857 MODBIT(term.mode, 0, MODE_MOUSE);
1858 MODBIT(term.mode, set, MODE_MOUSEMANY);
1859 break;
1860 case 1004: /* 1004: send focus events to tty */
1861 MODBIT(term.mode, set, MODE_FOCUS);
1862 break;
1863 case 1006: /* 1006: extended reporting mode */
1864 MODBIT(term.mode, set, MODE_MOUSESGR);
1865 break;
1866 case 1034:
1867 MODBIT(term.mode, set, MODE_8BIT);
1868 break;
1869 case 1049: /* swap screen & set/restore cursor as xterm */
1870 if (!allowaltscreen)
1871 break;
1872 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1873 /* FALLTHROUGH */
1874 case 47: /* swap screen */
1875 case 1047:
1876 if (!allowaltscreen)
1877 break;
1878 alt = IS_SET(MODE_ALTSCREEN);
1879 if(alt) {
1880 tclearregion(0, 0, term.col-1,
1881 term.row-1);
1882 }
1883 if(set ^ alt) /* set is always 1 or 0 */
1884 tswapscreen();
1885 if(*args != 1049)
1886 break;
1887 /* FALLTHROUGH */
1888 case 1048:
1889 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1890 break;
1891 case 2004: /* 2004: bracketed paste mode */
1892 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1893 break;
1894 /* Not implemented mouse modes. See comments there. */
1895 case 1001: /* mouse highlight mode; can hang the
1896 terminal by design when implemented. */
1897 case 1005: /* UTF-8 mouse mode; will confuse
1898 applications not supporting UTF-8
1899 and luit. */
1900 case 1015: /* urxvt mangled mouse mode; incompatible
1901 and can be mistaken for other control
1902 codes. */
1903 default:
1904 fprintf(stderr,
1905 "erresc: unknown private set/reset mode %d\n",
1906 *args);
1907 break;
1908 }
1909 } else {
1910 switch(*args) {
1911 case 0: /* Error (IGNORED) */
1912 break;
1913 case 2: /* KAM -- keyboard action */
1914 MODBIT(term.mode, set, MODE_KBDLOCK);
1915 break;
1916 case 4: /* IRM -- Insertion-replacement */
1917 MODBIT(term.mode, set, MODE_INSERT);
1918 break;
1919 case 12: /* SRM -- Send/Receive */
1920 MODBIT(term.mode, !set, MODE_ECHO);
1921 break;
1922 case 20: /* LNM -- Linefeed/new line */
1923 MODBIT(term.mode, set, MODE_CRLF);
1924 break;
1925 default:
1926 fprintf(stderr,
1927 "erresc: unknown set/reset mode %d\n",
1928 *args);
1929 break;
1930 }
1931 }
1932 }
1933 }
1934
1935 void
1936 csihandle(void) {
1937 char buf[40];
1938 int len;
1939
1940 switch(csiescseq.mode) {
1941 default:
1942 unknown:
1943 fprintf(stderr, "erresc: unknown csi ");
1944 csidump();
1945 /* die(""); */
1946 break;
1947 case '@': /* ICH -- Insert <n> blank char */
1948 DEFAULT(csiescseq.arg[0], 1);
1949 tinsertblank(csiescseq.arg[0]);
1950 break;
1951 case 'A': /* CUU -- Cursor <n> Up */
1952 DEFAULT(csiescseq.arg[0], 1);
1953 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1954 break;
1955 case 'B': /* CUD -- Cursor <n> Down */
1956 case 'e': /* VPR --Cursor <n> Down */
1957 DEFAULT(csiescseq.arg[0], 1);
1958 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1959 break;
1960 case 'i': /* MC -- Media Copy */
1961 switch(csiescseq.arg[0]) {
1962 case 0:
1963 tdump();
1964 break;
1965 case 1:
1966 tdumpline(term.c.y);
1967 break;
1968 case 2:
1969 tdumpsel();
1970 break;
1971 case 4:
1972 term.mode &= ~MODE_PRINT;
1973 break;
1974 case 5:
1975 term.mode |= MODE_PRINT;
1976 break;
1977 }
1978 break;
1979 case 'c': /* DA -- Device Attributes */
1980 if(csiescseq.arg[0] == 0)
1981 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1982 break;
1983 case 'C': /* CUF -- Cursor <n> Forward */
1984 case 'a': /* HPR -- Cursor <n> Forward */
1985 DEFAULT(csiescseq.arg[0], 1);
1986 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1987 break;
1988 case 'D': /* CUB -- Cursor <n> Backward */
1989 DEFAULT(csiescseq.arg[0], 1);
1990 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1991 break;
1992 case 'E': /* CNL -- Cursor <n> Down and first col */
1993 DEFAULT(csiescseq.arg[0], 1);
1994 tmoveto(0, term.c.y+csiescseq.arg[0]);
1995 break;
1996 case 'F': /* CPL -- Cursor <n> Up and first col */
1997 DEFAULT(csiescseq.arg[0], 1);
1998 tmoveto(0, term.c.y-csiescseq.arg[0]);
1999 break;
2000 case 'g': /* TBC -- Tabulation clear */
2001 switch(csiescseq.arg[0]) {
2002 case 0: /* clear current tab stop */
2003 term.tabs[term.c.x] = 0;
2004 break;
2005 case 3: /* clear all the tabs */
2006 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
2007 break;
2008 default:
2009 goto unknown;
2010 }
2011 break;
2012 case 'G': /* CHA -- Move to <col> */
2013 case '`': /* HPA */
2014 DEFAULT(csiescseq.arg[0], 1);
2015 tmoveto(csiescseq.arg[0]-1, term.c.y);
2016 break;
2017 case 'H': /* CUP -- Move to <row> <col> */
2018 case 'f': /* HVP */
2019 DEFAULT(csiescseq.arg[0], 1);
2020 DEFAULT(csiescseq.arg[1], 1);
2021 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2022 break;
2023 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2024 DEFAULT(csiescseq.arg[0], 1);
2025 tputtab(csiescseq.arg[0]);
2026 break;
2027 case 'J': /* ED -- Clear screen */
2028 selclear(NULL);
2029 switch(csiescseq.arg[0]) {
2030 case 0: /* below */
2031 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2032 if(term.c.y < term.row-1) {
2033 tclearregion(0, term.c.y+1, term.col-1,
2034 term.row-1);
2035 }
2036 break;
2037 case 1: /* above */
2038 if(term.c.y > 1)
2039 tclearregion(0, 0, term.col-1, term.c.y-1);
2040 tclearregion(0, term.c.y, term.c.x, term.c.y);
2041 break;
2042 case 2: /* all */
2043 tclearregion(0, 0, term.col-1, term.row-1);
2044 break;
2045 default:
2046 goto unknown;
2047 }
2048 break;
2049 case 'K': /* EL -- Clear line */
2050 switch(csiescseq.arg[0]) {
2051 case 0: /* right */
2052 tclearregion(term.c.x, term.c.y, term.col-1,
2053 term.c.y);
2054 break;
2055 case 1: /* left */
2056 tclearregion(0, term.c.y, term.c.x, term.c.y);
2057 break;
2058 case 2: /* all */
2059 tclearregion(0, term.c.y, term.col-1, term.c.y);
2060 break;
2061 }
2062 break;
2063 case 'S': /* SU -- Scroll <n> line up */
2064 DEFAULT(csiescseq.arg[0], 1);
2065 tscrollup(term.top, csiescseq.arg[0]);
2066 break;
2067 case 'T': /* SD -- Scroll <n> line down */
2068 DEFAULT(csiescseq.arg[0], 1);
2069 tscrolldown(term.top, csiescseq.arg[0]);
2070 break;
2071 case 'L': /* IL -- Insert <n> blank lines */
2072 DEFAULT(csiescseq.arg[0], 1);
2073 tinsertblankline(csiescseq.arg[0]);
2074 break;
2075 case 'l': /* RM -- Reset Mode */
2076 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2077 break;
2078 case 'M': /* DL -- Delete <n> lines */
2079 DEFAULT(csiescseq.arg[0], 1);
2080 tdeleteline(csiescseq.arg[0]);
2081 break;
2082 case 'X': /* ECH -- Erase <n> char */
2083 DEFAULT(csiescseq.arg[0], 1);
2084 tclearregion(term.c.x, term.c.y,
2085 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2086 break;
2087 case 'P': /* DCH -- Delete <n> char */
2088 DEFAULT(csiescseq.arg[0], 1);
2089 tdeletechar(csiescseq.arg[0]);
2090 break;
2091 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2092 DEFAULT(csiescseq.arg[0], 1);
2093 tputtab(-csiescseq.arg[0]);
2094 break;
2095 case 'd': /* VPA -- Move to <row> */
2096 DEFAULT(csiescseq.arg[0], 1);
2097 tmoveato(term.c.x, csiescseq.arg[0]-1);
2098 break;
2099 case 'h': /* SM -- Set terminal mode */
2100 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2101 break;
2102 case 'm': /* SGR -- Terminal attribute (color) */
2103 tsetattr(csiescseq.arg, csiescseq.narg);
2104 break;
2105 case 'n': /* DSR – Device Status Report (cursor position) */
2106 if (csiescseq.arg[0] == 6) {
2107 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2108 term.c.y+1, term.c.x+1);
2109 ttywrite(buf, len);
2110 }
2111 break;
2112 case 'r': /* DECSTBM -- Set Scrolling Region */
2113 if(csiescseq.priv) {
2114 goto unknown;
2115 } else {
2116 DEFAULT(csiescseq.arg[0], 1);
2117 DEFAULT(csiescseq.arg[1], term.row);
2118 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2119 tmoveato(0, 0);
2120 }
2121 break;
2122 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2123 tcursor(CURSOR_SAVE);
2124 break;
2125 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2126 tcursor(CURSOR_LOAD);
2127 break;
2128 }
2129 }
2130
2131 void
2132 csidump(void) {
2133 int i;
2134 uint c;
2135
2136 printf("ESC[");
2137 for(i = 0; i < csiescseq.len; i++) {
2138 c = csiescseq.buf[i] & 0xff;
2139 if(isprint(c)) {
2140 putchar(c);
2141 } else if(c == '\n') {
2142 printf("(\\n)");
2143 } else if(c == '\r') {
2144 printf("(\\r)");
2145 } else if(c == 0x1b) {
2146 printf("(\\e)");
2147 } else {
2148 printf("(%02x)", c);
2149 }
2150 }
2151 putchar('\n');
2152 }
2153
2154 void
2155 csireset(void) {
2156 memset(&csiescseq, 0, sizeof(csiescseq));
2157 }
2158
2159 void
2160 strhandle(void) {
2161 char *p = NULL;
2162 int j, narg, par;
2163
2164 term.esc &= ~(ESC_STR_END|ESC_STR);
2165 strparse();
2166 narg = strescseq.narg;
2167 par = atoi(strescseq.args[0]);
2168
2169 switch(strescseq.type) {
2170 case ']': /* OSC -- Operating System Command */
2171 switch(par) {
2172 case 0:
2173 case 1:
2174 case 2:
2175 if(narg > 1)
2176 xsettitle(strescseq.args[1]);
2177 return;
2178 case 4: /* color set */
2179 if(narg < 3)
2180 break;
2181 p = strescseq.args[2];
2182 /* FALLTHROUGH */
2183 case 104: /* color reset, here p = NULL */
2184 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2185 if(xsetcolorname(j, p)) {
2186 fprintf(stderr, "erresc: invalid color %s\n", p);
2187 } else {
2188 /*
2189 * TODO if defaultbg color is changed, borders
2190 * are dirty
2191 */
2192 redraw(0);
2193 }
2194 return;
2195 }
2196 break;
2197 case 'k': /* old title set compatibility */
2198 xsettitle(strescseq.args[0]);
2199 return;
2200 case 'P': /* DCS -- Device Control String */
2201 case '_': /* APC -- Application Program Command */
2202 case '^': /* PM -- Privacy Message */
2203 return;
2204 }
2205
2206 fprintf(stderr, "erresc: unknown str ");
2207 strdump();
2208 }
2209
2210 void
2211 strparse(void) {
2212 char *p = strescseq.buf;
2213
2214 strescseq.narg = 0;
2215 strescseq.buf[strescseq.len] = '\0';
2216 while(p && strescseq.narg < STR_ARG_SIZ)
2217 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2218 }
2219
2220 void
2221 strdump(void) {
2222 int i;
2223 uint c;
2224
2225 printf("ESC%c", strescseq.type);
2226 for(i = 0; i < strescseq.len; i++) {
2227 c = strescseq.buf[i] & 0xff;
2228 if(c == '\0') {
2229 return;
2230 } else if(isprint(c)) {
2231 putchar(c);
2232 } else if(c == '\n') {
2233 printf("(\\n)");
2234 } else if(c == '\r') {
2235 printf("(\\r)");
2236 } else if(c == 0x1b) {
2237 printf("(\\e)");
2238 } else {
2239 printf("(%02x)", c);
2240 }
2241 }
2242 printf("ESC\\\n");
2243 }
2244
2245 void
2246 strreset(void) {
2247 memset(&strescseq, 0, sizeof(strescseq));
2248 }
2249
2250 void
2251 tprinter(char *s, size_t len) {
2252 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2253 fprintf(stderr, "Error writing in %s:%s\n",
2254 opt_io, strerror(errno));
2255 close(iofd);
2256 iofd = -1;
2257 }
2258 }
2259
2260 void
2261 toggleprinter(const Arg *arg) {
2262 term.mode ^= MODE_PRINT;
2263 }
2264
2265 void
2266 printscreen(const Arg *arg) {
2267 tdump();
2268 }
2269
2270 void
2271 printsel(const Arg *arg) {
2272 tdumpsel();
2273 }
2274
2275 void
2276 tdumpsel(void) {
2277 char *ptr;
2278
2279 if((ptr = getsel())) {
2280 tprinter(ptr, strlen(ptr));
2281 free(ptr);
2282 }
2283 }
2284
2285 void
2286 tdumpline(int n) {
2287 Glyph *bp, *end;
2288
2289 bp = &term.line[n][0];
2290 end = &bp[term.col-1];
2291 while(end > bp && !strcmp(" ", end->c))
2292 --end;
2293 if(bp != end || strcmp(bp->c, " ")) {
2294 for( ;bp <= end; ++bp)
2295 tprinter(bp->c, strlen(bp->c));
2296 }
2297 tprinter("\n", 1);
2298 }
2299
2300 void
2301 tdump(void) {
2302 int i;
2303
2304 for(i = 0; i < term.row; ++i)
2305 tdumpline(i);
2306 }
2307
2308 void
2309 tputtab(int n) {
2310 uint x = term.c.x;
2311
2312 if(n > 0) {
2313 while(x < term.col && n--)
2314 for(++x; x < term.col && !term.tabs[x]; ++x)
2315 /* nothing */ ;
2316 } else if(n < 0) {
2317 while(x > 0 && n++)
2318 for(--x; x > 0 && !term.tabs[x]; --x)
2319 /* nothing */ ;
2320 }
2321 tmoveto(x, term.c.y);
2322 }
2323
2324 void
2325 techo(char *buf, int len) {
2326 for(; len > 0; buf++, len--) {
2327 char c = *buf;
2328
2329 if(ISCONTROL(c)) { /* control code */
2330 if(c & 0x80) {
2331 c &= 0x7f;
2332 tputc("^", 1);
2333 tputc("[", 1);
2334 } else if(c != '\n' && c != '\r' && c != '\t') {
2335 c ^= '\x40';
2336 tputc("^", 1);
2337 }
2338 tputc(&c, 1);
2339 } else {
2340 break;
2341 }
2342 }
2343 if(len)
2344 tputc(buf, len);
2345 }
2346
2347 void
2348 tdeftran(char ascii) {
2349 static char cs[] = "0B";
2350 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2351 char *p;
2352
2353 if((p = strchr(cs, ascii)) == NULL) {
2354 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2355 } else {
2356 term.trantbl[term.icharset] = vcs[p - cs];
2357 }
2358 }
2359
2360 void
2361 tcontrolcode(uchar ascii) {
2362 static char question[UTF_SIZ] = "?";
2363
2364 switch(ascii) {
2365 case '\t': /* HT */
2366 tputtab(1);
2367 return;
2368 case '\b': /* BS */
2369 tmoveto(term.c.x-1, term.c.y);
2370 return;
2371 case '\r': /* CR */
2372 tmoveto(0, term.c.y);
2373 return;
2374 case '\f': /* LF */
2375 case '\v': /* VT */
2376 case '\n': /* LF */
2377 /* go to first col if the mode is set */
2378 tnewline(IS_SET(MODE_CRLF));
2379 return;
2380 case '\a': /* BEL */
2381 if(term.esc & ESC_STR_END) {
2382 /* backwards compatibility to xterm */
2383 strhandle();
2384 } else {
2385 if(!(xw.state & WIN_FOCUSED))
2386 xseturgency(1);
2387 if (bellvolume)
2388 XBell(xw.dpy, bellvolume);
2389 }
2390 break;
2391 case '\033': /* ESC */
2392 csireset();
2393 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2394 term.esc |= ESC_START;
2395 return;
2396 case '\016': /* SO */
2397 term.charset = 0;
2398 return;
2399 case '\017': /* SI */
2400 term.charset = 1;
2401 return;
2402 case '\032': /* SUB */
2403 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2404 case '\030': /* CAN */
2405 csireset();
2406 break;
2407 case '\005': /* ENQ (IGNORED) */
2408 case '\000': /* NUL (IGNORED) */
2409 case '\021': /* XON (IGNORED) */
2410 case '\023': /* XOFF (IGNORED) */
2411 case 0177: /* DEL (IGNORED) */
2412 return;
2413 case 0x84: /* TODO: IND */
2414 case 0x85: /* TODO: NEL */
2415 case 0x88: /* TODO: HTS */
2416 case 0x8d: /* TODO: RI */
2417 case 0x8e: /* TODO: SS2 */
2418 case 0x8f: /* TODO: SS3 */
2419 case 0x90: /* TODO: DCS */
2420 case 0x98: /* TODO: SOS */
2421 case 0x9a: /* TODO: DECID */
2422 case 0x9b: /* TODO: CSI */
2423 case 0x9c: /* TODO: ST */
2424 case 0x9d: /* TODO: OSC */
2425 case 0x9e: /* TODO: PM */
2426 case 0x9f: /* TODO: APC */
2427 break;
2428 }
2429 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2430 term.esc &= ~(ESC_STR_END|ESC_STR);
2431 return;
2432 }
2433
2434 void
2435 tdectest(char c) {
2436 static char E[UTF_SIZ] = "E";
2437 int x, y;
2438
2439 if(c == '8') { /* DEC screen alignment test. */
2440 for(x = 0; x < term.col; ++x) {
2441 for(y = 0; y < term.row; ++y)
2442 tsetchar(E, &term.c.attr, x, y);
2443 }
2444 }
2445 }
2446
2447 void
2448 tputc(char *c, int len) {
2449 uchar ascii;
2450 bool control;
2451 long unicodep;
2452 int width;
2453 Glyph *gp;
2454
2455 if(len == 1) {
2456 width = 1;
2457 unicodep = ascii = *c;
2458 } else {
2459 utf8decode(c, &unicodep, UTF_SIZ);
2460 width = wcwidth(unicodep);
2461 control = ISCONTROLC1(unicodep);
2462 ascii = unicodep;
2463 }
2464
2465 if(IS_SET(MODE_PRINT))
2466 tprinter(c, len);
2467 control = ISCONTROL(unicodep);
2468
2469 /*
2470 * STR sequence must be checked before anything else
2471 * because it uses all following characters until it
2472 * receives a ESC, a SUB, a ST or any other C1 control
2473 * character.
2474 */
2475 if(term.esc & ESC_STR) {
2476 if(width == 1 &&
2477 (ascii == '\a' || ascii == 030 ||
2478 ascii == 032 || ascii == 033 ||
2479 ISCONTROLC1(unicodep))) {
2480 term.esc &= ~(ESC_START|ESC_STR);
2481 term.esc |= ESC_STR_END;
2482 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2483 memmove(&strescseq.buf[strescseq.len], c, len);
2484 strescseq.len += len;
2485 return;
2486 } else {
2487 /*
2488 * Here is a bug in terminals. If the user never sends
2489 * some code to stop the str or esc command, then st
2490 * will stop responding. But this is better than
2491 * silently failing with unknown characters. At least
2492 * then users will report back.
2493 *
2494 * In the case users ever get fixed, here is the code:
2495 */
2496 /*
2497 * term.esc = 0;
2498 * strhandle();
2499 */
2500 return;
2501 }
2502 }
2503
2504 /*
2505 * Actions of control codes must be performed as soon they arrive
2506 * because they can be embedded inside a control sequence, and
2507 * they must not cause conflicts with sequences.
2508 */
2509 if(control) {
2510 tcontrolcode(ascii);
2511 /*
2512 * control codes are not shown ever
2513 */
2514 return;
2515 } else if(term.esc & ESC_START) {
2516 if(term.esc & ESC_CSI) {
2517 csiescseq.buf[csiescseq.len++] = ascii;
2518 if(BETWEEN(ascii, 0x40, 0x7E)
2519 || csiescseq.len >= \
2520 sizeof(csiescseq.buf)-1) {
2521 term.esc = 0;
2522 csiparse();
2523 csihandle();
2524 }
2525 return;
2526 } else if(term.esc & ESC_ALTCHARSET) {
2527 tdeftran(ascii);
2528 } else if(term.esc & ESC_TEST) {
2529 tdectest(ascii);
2530 } else {
2531 switch(ascii) {
2532 case '[':
2533 term.esc |= ESC_CSI;
2534 return;
2535 case '#':
2536 term.esc |= ESC_TEST;
2537 return;
2538 case 'P': /* DCS -- Device Control String */
2539 case '_': /* APC -- Application Program Command */
2540 case '^': /* PM -- Privacy Message */
2541 case ']': /* OSC -- Operating System Command */
2542 case 'k': /* old title set compatibility */
2543 strreset();
2544 strescseq.type = ascii;
2545 term.esc |= ESC_STR;
2546 return;
2547 case '(': /* set primary charset G0 */
2548 case ')': /* set secondary charset G1 */
2549 case '*': /* set tertiary charset G2 */
2550 case '+': /* set quaternary charset G3 */
2551 term.icharset = ascii - '(';
2552 term.esc |= ESC_ALTCHARSET;
2553 return;
2554 case 'D': /* IND -- Linefeed */
2555 if(term.c.y == term.bot) {
2556 tscrollup(term.top, 1);
2557 } else {
2558 tmoveto(term.c.x, term.c.y+1);
2559 }
2560 break;
2561 case 'E': /* NEL -- Next line */
2562 tnewline(1); /* always go to first col */
2563 break;
2564 case 'H': /* HTS -- Horizontal tab stop */
2565 term.tabs[term.c.x] = 1;
2566 break;
2567 case 'M': /* RI -- Reverse index */
2568 if(term.c.y == term.top) {
2569 tscrolldown(term.top, 1);
2570 } else {
2571 tmoveto(term.c.x, term.c.y-1);
2572 }
2573 break;
2574 case 'Z': /* DECID -- Identify Terminal */
2575 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2576 break;
2577 case 'c': /* RIS -- Reset to inital state */
2578 treset();
2579 xresettitle();
2580 xloadcols();
2581 break;
2582 case '=': /* DECPAM -- Application keypad */
2583 term.mode |= MODE_APPKEYPAD;
2584 break;
2585 case '>': /* DECPNM -- Normal keypad */
2586 term.mode &= ~MODE_APPKEYPAD;
2587 break;
2588 case '7': /* DECSC -- Save Cursor */
2589 tcursor(CURSOR_SAVE);
2590 break;
2591 case '8': /* DECRC -- Restore Cursor */
2592 tcursor(CURSOR_LOAD);
2593 break;
2594 case '\\': /* ST -- String Terminator */
2595 if(term.esc & ESC_STR_END)
2596 strhandle();
2597 break;
2598 default:
2599 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2600 (uchar) ascii, isprint(ascii)? ascii:'.');
2601 break;
2602 }
2603 }
2604 term.esc = 0;
2605 /*
2606 * All characters which form part of a sequence are not
2607 * printed
2608 */
2609 return;
2610 }
2611 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2612 selclear(NULL);
2613
2614 gp = &term.line[term.c.y][term.c.x];
2615 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2616 gp->mode |= ATTR_WRAP;
2617 tnewline(1);
2618 }
2619
2620 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2621 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2622
2623 if(term.c.x+width > term.col)
2624 tnewline(1);
2625
2626 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2627
2628 if(width == 2) {
2629 gp->mode |= ATTR_WIDE;
2630 if(term.c.x+1 < term.col) {
2631 gp[1].c[0] = '\0';
2632 gp[1].mode = ATTR_WDUMMY;
2633 }
2634 }
2635 if(term.c.x+width < term.col) {
2636 tmoveto(term.c.x+width, term.c.y);
2637 } else {
2638 term.c.state |= CURSOR_WRAPNEXT;
2639 }
2640 }
2641
2642 int
2643 tresize(int col, int row) {
2644 int i;
2645 int minrow = MIN(row, term.row);
2646 int mincol = MIN(col, term.col);
2647 int slide = term.c.y - row + 1;
2648 bool *bp;
2649 Line *orig;
2650 TCursor c;
2651
2652 if(col < 1 || row < 1)
2653 return 0;
2654
2655 /* free unneeded rows */
2656 i = 0;
2657 if(slide > 0) {
2658 /*
2659 * slide screen to keep cursor where we expect it -
2660 * tscrollup would work here, but we can optimize to
2661 * memmove because we're freeing the earlier lines
2662 */
2663 for(/* i = 0 */; i < slide; i++) {
2664 free(term.line[i]);
2665 free(term.alt[i]);
2666 }
2667 memmove(term.line, term.line + slide, row * sizeof(Line));
2668 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2669 }
2670 for(i += row; i < term.row; i++) {
2671 free(term.line[i]);
2672 free(term.alt[i]);
2673 }
2674
2675 /* resize to new height */
2676 term.line = xrealloc(term.line, row * sizeof(Line));
2677 term.alt = xrealloc(term.alt, row * sizeof(Line));
2678 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2679 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2680
2681 /* resize each row to new width, zero-pad if needed */
2682 for(i = 0; i < minrow; i++) {
2683 term.dirty[i] = 1;
2684 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2685 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2686 }
2687
2688 /* allocate any new rows */
2689 for(/* i == minrow */; i < row; i++) {
2690 term.dirty[i] = 1;
2691 term.line[i] = xmalloc(col * sizeof(Glyph));
2692 term.alt[i] = xmalloc(col * sizeof(Glyph));
2693 }
2694 if(col > term.col) {
2695 bp = term.tabs + term.col;
2696
2697 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2698 while(--bp > term.tabs && !*bp)
2699 /* nothing */ ;
2700 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2701 *bp = 1;
2702 }
2703 /* update terminal size */
2704 term.col = col;
2705 term.row = row;
2706 /* reset scrolling region */
2707 tsetscroll(0, row-1);
2708 /* make use of the LIMIT in tmoveto */
2709 tmoveto(term.c.x, term.c.y);
2710 /* Clearing both screens */
2711 orig = term.line;
2712 c = term.c;
2713 do {
2714 if(mincol < col && 0 < minrow) {
2715 tclearregion(mincol, 0, col - 1, minrow - 1);
2716 }
2717 if(0 < col && minrow < row) {
2718 tclearregion(0, minrow, col - 1, row - 1);
2719 }
2720 tswapscreen();
2721 tcursor(CURSOR_LOAD);
2722 } while(orig != term.line);
2723 term.c = c;
2724
2725 return (slide > 0);
2726 }
2727
2728 void
2729 xresize(int col, int row) {
2730 xw.tw = MAX(1, col * xw.cw);
2731 xw.th = MAX(1, row * xw.ch);
2732
2733 XFreePixmap(xw.dpy, xw.buf);
2734 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2735 DefaultDepth(xw.dpy, xw.scr));
2736 XftDrawChange(xw.draw, xw.buf);
2737 xclear(0, 0, xw.w, xw.h);
2738 }
2739
2740 static inline ushort
2741 sixd_to_16bit(int x) {
2742 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2743 }
2744
2745 void
2746 xloadcols(void) {
2747 int i;
2748 XRenderColor color = { .alpha = 0xffff };
2749 static bool loaded;
2750 Color *cp;
2751
2752 if(loaded) {
2753 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2754 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2755 }
2756
2757 /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
2758 for(i = 0; i < LEN(colorname); i++) {
2759 if(!colorname[i])
2760 continue;
2761 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2762 die("Could not allocate color '%s'\n", colorname[i]);
2763 }
2764 }
2765
2766 /* load colors [16-231] ; same colors as xterm */
2767 for(i = 16; i < 6*6*6+16; i++) {
2768 color.red = sixd_to_16bit( ((i-16)/36)%6 );
2769 color.green = sixd_to_16bit( ((i-16)/6) %6 );
2770 color.blue = sixd_to_16bit( ((i-16)/1) %6 );
2771 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2772 die("Could not allocate color %d\n", i);
2773 }
2774
2775 /* load colors [232-255] ; grayscale */
2776 for(; i < 256; i++) {
2777 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
2778 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
2779 die("Could not allocate color %d\n", i);
2780 }
2781 loaded = true;
2782 }
2783
2784 int
2785 xsetcolorname(int x, const char *name) {
2786 XRenderColor color = { .alpha = 0xffff };
2787 Color ncolor;
2788
2789 if(!BETWEEN(x, 0, LEN(colorname)))
2790 return 1;
2791
2792 if(!name) {
2793 if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
2794 color.red = sixd_to_16bit( ((x-16)/36)%6 );
2795 color.green = sixd_to_16bit( ((x-16)/6) %6 );
2796 color.blue = sixd_to_16bit( ((x-16)/1) %6 );
2797 if(!XftColorAllocValue(xw.dpy, xw.vis,
2798 xw.cmap, &color, &ncolor)) {
2799 return 1;
2800 }
2801
2802 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2803 dc.col[x] = ncolor;
2804 return 0;
2805 } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
2806 color.red = color.green = color.blue = \
2807 0x0808 + 0x0a0a * (x - (16 + 216));
2808 if(!XftColorAllocValue(xw.dpy, xw.vis,
2809 xw.cmap, &color, &ncolor)) {
2810 return 1;
2811 }
2812
2813 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2814 dc.col[x] = ncolor;
2815 return 0;
2816 } else { /* system colors */
2817 name = colorname[x];
2818 }
2819 }
2820 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
2821 return 1;
2822
2823 XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
2824 dc.col[x] = ncolor;
2825 return 0;
2826 }
2827
2828 void
2829 xtermclear(int col1, int row1, int col2, int row2) {
2830 XftDrawRect(xw.draw,
2831 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2832 borderpx + col1 * xw.cw,
2833 borderpx + row1 * xw.ch,
2834 (col2-col1+1) * xw.cw,
2835 (row2-row1+1) * xw.ch);
2836 }
2837
2838 /*
2839 * Absolute coordinates.
2840 */
2841 void
2842 xclear(int x1, int y1, int x2, int y2) {
2843 XftDrawRect(xw.draw,
2844 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2845 x1, y1, x2-x1, y2-y1);
2846 }
2847
2848 void
2849 xhints(void) {
2850 XClassHint class = {opt_class ? opt_class : termname, termname};
2851 XWMHints wm = {.flags = InputHint, .input = 1};
2852 XSizeHints *sizeh = NULL;
2853
2854 sizeh = XAllocSizeHints();
2855
2856 sizeh->flags = PSize | PResizeInc | PBaseSize;
2857 sizeh->height = xw.h;
2858 sizeh->width = xw.w;
2859 sizeh->height_inc = xw.ch;
2860 sizeh->width_inc = xw.cw;
2861 sizeh->base_height = 2 * borderpx;
2862 sizeh->base_width = 2 * borderpx;
2863 if(xw.isfixed == True) {
2864 sizeh->flags |= PMaxSize | PMinSize;
2865 sizeh->min_width = sizeh->max_width = xw.w;
2866 sizeh->min_height = sizeh->max_height = xw.h;
2867 }
2868 if(xw.gm & (XValue|YValue)) {
2869 sizeh->flags |= USPosition | PWinGravity;
2870 sizeh->x = xw.l;
2871 sizeh->y = xw.t;
2872 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2873 }
2874
2875 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2876 &class);
2877 XFree(sizeh);
2878 }
2879
2880 int
2881 xgeommasktogravity(int mask) {
2882 switch(mask & (XNegative|YNegative)) {
2883 case 0:
2884 return NorthWestGravity;
2885 case XNegative:
2886 return NorthEastGravity;
2887 case YNegative:
2888 return SouthWestGravity;
2889 }
2890 return SouthEastGravity;
2891 }
2892
2893 int
2894 xloadfont(Font *f, FcPattern *pattern) {
2895 FcPattern *match;
2896 FcResult result;
2897
2898 match = FcFontMatch(NULL, pattern, &result);
2899 if(!match)
2900 return 1;
2901
2902 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2903 FcPatternDestroy(match);
2904 return 1;
2905 }
2906
2907 f->set = NULL;
2908 f->pattern = FcPatternDuplicate(pattern);
2909
2910 f->ascent = f->match->ascent;
2911 f->descent = f->match->descent;
2912 f->lbearing = 0;
2913 f->rbearing = f->match->max_advance_width;
2914
2915 f->height = f->ascent + f->descent;
2916 f->width = f->lbearing + f->rbearing;
2917
2918 return 0;
2919 }
2920
2921 void
2922 xloadfonts(char *fontstr, double fontsize) {
2923 FcPattern *pattern;
2924 FcResult r_sz, r_psz;
2925 double fontval;
2926 float ceilf(float);
2927
2928 if(fontstr[0] == '-') {
2929 pattern = XftXlfdParse(fontstr, False, False);
2930 } else {
2931 pattern = FcNameParse((FcChar8 *)fontstr);
2932 }
2933
2934 if(!pattern)
2935 die("st: can't open font %s\n", fontstr);
2936
2937 if(fontsize > 0) {
2938 FcPatternDel(pattern, FC_PIXEL_SIZE);
2939 FcPatternDel(pattern, FC_SIZE);
2940 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2941 usedfontsize = fontsize;
2942 } else {
2943 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2944 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2945 if(r_psz == FcResultMatch) {
2946 usedfontsize = fontval;
2947 } else if(r_sz == FcResultMatch) {
2948 usedfontsize = -1;
2949 } else {
2950 /*
2951 * Default font size is 12, if none given. This is to
2952 * have a known usedfontsize value.
2953 */
2954 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2955 usedfontsize = 12;
2956 }
2957 }
2958
2959 FcConfigSubstitute(0, pattern, FcMatchPattern);
2960 FcDefaultSubstitute(pattern);
2961
2962 if(xloadfont(&dc.font, pattern))
2963 die("st: can't open font %s\n", fontstr);
2964
2965 if(usedfontsize < 0) {
2966 FcPatternGetDouble(dc.font.match->pattern,
2967 FC_PIXEL_SIZE, 0, &fontval);
2968 usedfontsize = fontval;
2969 }
2970
2971 /* Setting character width and height. */
2972 xw.cw = ceilf(dc.font.width * cwscale);
2973 xw.ch = ceilf(dc.font.height * chscale);
2974
2975 FcPatternDel(pattern, FC_SLANT);
2976 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2977 if(xloadfont(&dc.ifont, pattern))
2978 die("st: can't open font %s\n", fontstr);
2979
2980 FcPatternDel(pattern, FC_WEIGHT);
2981 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2982 if(xloadfont(&dc.ibfont, pattern))
2983 die("st: can't open font %s\n", fontstr);
2984
2985 FcPatternDel(pattern, FC_SLANT);
2986 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2987 if(xloadfont(&dc.bfont, pattern))
2988 die("st: can't open font %s\n", fontstr);
2989
2990 FcPatternDestroy(pattern);
2991 }
2992
2993 int
2994 xloadfontset(Font *f) {
2995 FcResult result;
2996
2997 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2998 return 1;
2999 return 0;
3000 }
3001
3002 void
3003 xunloadfont(Font *f) {
3004 XftFontClose(xw.dpy, f->match);
3005 FcPatternDestroy(f->pattern);
3006 if(f->set)
3007 FcFontSetDestroy(f->set);
3008 }
3009
3010 void
3011 xunloadfonts(void) {
3012 /* Free the loaded fonts in the font cache. */
3013 while(frclen > 0)
3014 XftFontClose(xw.dpy, frc[--frclen].font);
3015
3016 xunloadfont(&dc.font);
3017 xunloadfont(&dc.bfont);
3018 xunloadfont(&dc.ifont);
3019 xunloadfont(&dc.ibfont);
3020 }
3021
3022 void
3023 xzoom(const Arg *arg) {
3024 xunloadfonts();
3025 xloadfonts(usedfont, usedfontsize + arg->i);
3026 cresize(0, 0);
3027 redraw(0);
3028 xhints();
3029 }
3030
3031 void
3032 xinit(void) {
3033 XGCValues gcvalues;
3034 Cursor cursor;
3035 Window parent;
3036 pid_t thispid = getpid();
3037
3038 if(!(xw.dpy = XOpenDisplay(NULL)))
3039 die("Can't open display\n");
3040 xw.scr = XDefaultScreen(xw.dpy);
3041 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3042
3043 /* font */
3044 if(!FcInit())
3045 die("Could not init fontconfig.\n");
3046
3047 usedfont = (opt_font == NULL)? font : opt_font;
3048 xloadfonts(usedfont, 0);
3049
3050 /* colors */
3051 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3052 xloadcols();
3053
3054 /* adjust fixed window geometry */
3055 xw.w = 2 * borderpx + term.col * xw.cw;
3056 xw.h = 2 * borderpx + term.row * xw.ch;
3057 if(xw.gm & XNegative)
3058 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3059 if(xw.gm & YNegative)
3060 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3061
3062 /* Events */
3063 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3064 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3065 xw.attrs.bit_gravity = NorthWestGravity;
3066 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3067 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3068 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3069 xw.attrs.colormap = xw.cmap;
3070
3071 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3072 XRootWindow(xw.dpy, xw.scr);
3073 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3074 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3075 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3076 | CWEventMask | CWColormap, &xw.attrs);
3077
3078 memset(&gcvalues, 0, sizeof(gcvalues));
3079 gcvalues.graphics_exposures = False;
3080 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3081 &gcvalues);
3082 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3083 DefaultDepth(xw.dpy, xw.scr));
3084 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3085 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3086
3087 /* Xft rendering context */
3088 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3089
3090 /* input methods */
3091 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3092 XSetLocaleModifiers("@im=local");
3093 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3094 XSetLocaleModifiers("@im=");
3095 if((xw.xim = XOpenIM(xw.dpy,
3096 NULL, NULL, NULL)) == NULL) {
3097 die("XOpenIM failed. Could not open input"
3098 " device.\n");
3099 }
3100 }
3101 }
3102 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3103 | XIMStatusNothing, XNClientWindow, xw.win,
3104 XNFocusWindow, xw.win, NULL);
3105 if(xw.xic == NULL)
3106 die("XCreateIC failed. Could not obtain input method.\n");
3107
3108 /* white cursor, black outline */
3109 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3110 XDefineCursor(xw.dpy, xw.win, cursor);
3111 XRecolorCursor(xw.dpy, cursor,
3112 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3113 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3114
3115 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3116 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3117 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3118 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3119
3120 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3121 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3122 PropModeReplace, (uchar *)&thispid, 1);
3123
3124 xresettitle();
3125 XMapWindow(xw.dpy, xw.win);
3126 xhints();
3127 XSync(xw.dpy, False);
3128 }
3129
3130 void
3131 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3132 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3133 width = charlen * xw.cw, xp, i;
3134 int frcflags;
3135 int u8fl, u8fblen, u8cblen, doesexist;
3136 char *u8c, *u8fs;
3137 long unicodep;
3138 Font *font = &dc.font;
3139 FcResult fcres;
3140 FcPattern *fcpattern, *fontpattern;
3141 FcFontSet *fcsets[] = { NULL };
3142 FcCharSet *fccharset;
3143 Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3144 XRenderColor colfg, colbg;
3145 XRectangle r;
3146 int oneatatime;
3147
3148 frcflags = FRC_NORMAL;
3149
3150 if(base.mode & ATTR_ITALIC) {
3151 if(base.fg == defaultfg)
3152 base.fg = defaultitalic;
3153 font = &dc.ifont;
3154 frcflags = FRC_ITALIC;
3155 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3156 if(base.fg == defaultfg)
3157 base.fg = defaultitalic;
3158 font = &dc.ibfont;
3159 frcflags = FRC_ITALICBOLD;
3160 } else if(base.mode & ATTR_UNDERLINE) {
3161 if(base.fg == defaultfg)
3162 base.fg = defaultunderline;
3163 }
3164
3165 if(IS_TRUECOL(base.fg)) {
3166 colfg.alpha = 0xffff;
3167 colfg.red = TRUERED(base.fg);
3168 colfg.green = TRUEGREEN(base.fg);
3169 colfg.blue = TRUEBLUE(base.fg);
3170 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3171 fg = &truefg;
3172 } else {
3173 fg = &dc.col[base.fg];
3174 }
3175
3176 if(IS_TRUECOL(base.bg)) {
3177 colbg.alpha = 0xffff;
3178 colbg.green = TRUEGREEN(base.bg);
3179 colbg.red = TRUERED(base.bg);
3180 colbg.blue = TRUEBLUE(base.bg);
3181 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3182 bg = &truebg;
3183 } else {
3184 bg = &dc.col[base.bg];
3185 }
3186
3187 if(base.mode & ATTR_BOLD) {
3188 /*
3189 * change basic system colors [0-7]
3190 * to bright system colors [8-15]
3191 */
3192 if(BETWEEN(base.fg, 0, 7))
3193 fg = &dc.col[base.fg + 8];
3194
3195 if(base.mode & ATTR_ITALIC) {
3196 font = &dc.ibfont;
3197 frcflags = FRC_ITALICBOLD;
3198 } else {
3199 font = &dc.bfont;
3200 frcflags = FRC_BOLD;
3201 }
3202 }
3203
3204 if(IS_SET(MODE_REVERSE)) {
3205 if(fg == &dc.col[defaultfg]) {
3206 fg = &dc.col[defaultbg];
3207 } else {
3208 colfg.red = ~fg->color.red;
3209 colfg.green = ~fg->color.green;
3210 colfg.blue = ~fg->color.blue;
3211 colfg.alpha = fg->color.alpha;
3212 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3213 &revfg);
3214 fg = &revfg;
3215 }
3216
3217 if(bg == &dc.col[defaultbg]) {
3218 bg = &dc.col[defaultfg];
3219 } else {
3220 colbg.red = ~bg->color.red;
3221 colbg.green = ~bg->color.green;
3222 colbg.blue = ~bg->color.blue;
3223 colbg.alpha = bg->color.alpha;
3224 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3225 &revbg);
3226 bg = &revbg;
3227 }
3228 }
3229
3230 if(base.mode & ATTR_REVERSE) {
3231 temp = fg;
3232 fg = bg;
3233 bg = temp;
3234 }
3235
3236 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3237 fg = bg;
3238
3239 if(base.mode & ATTR_INVISIBLE)
3240 fg = bg;
3241
3242 /* Intelligent cleaning up of the borders. */
3243 if(x == 0) {
3244 xclear(0, (y == 0)? 0 : winy, borderpx,
3245 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3246 }
3247 if(x + charlen >= term.col) {
3248 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3249 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3250 }
3251 if(y == 0)
3252 xclear(winx, 0, winx + width, borderpx);
3253 if(y == term.row-1)
3254 xclear(winx, winy + xw.ch, winx + width, xw.h);
3255
3256 /* Clean up the region we want to draw to. */
3257 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3258
3259 /* Set the clip region because Xft is sometimes dirty. */
3260 r.x = 0;
3261 r.y = 0;
3262 r.height = xw.ch;
3263 r.width = width;
3264 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3265
3266 for(xp = winx; bytelen > 0;) {
3267 /*
3268 * Search for the range in the to be printed string of glyphs
3269 * that are in the main font. Then print that range. If
3270 * some glyph is found that is not in the font, do the
3271 * fallback dance.
3272 */
3273 u8fs = s;
3274 u8fblen = 0;
3275 u8fl = 0;
3276 oneatatime = font->width != xw.cw;
3277 for(;;) {
3278 u8c = s;
3279 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3280 s += u8cblen;
3281 bytelen -= u8cblen;
3282
3283 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3284 if(doesexist) {
3285 u8fl++;
3286 u8fblen += u8cblen;
3287 if(!oneatatime && bytelen > 0)
3288 continue;
3289 }
3290
3291 if(u8fl > 0) {
3292 XftDrawStringUtf8(xw.draw, fg,
3293 font->match, xp,
3294 winy + font->ascent,
3295 (FcChar8 *)u8fs,
3296 u8fblen);
3297 xp += xw.cw * u8fl;
3298 }
3299 break;
3300 }
3301 if(doesexist) {
3302 if(oneatatime)
3303 continue;
3304 break;
3305 }
3306
3307 /* Search the font cache. */
3308 for(i = 0; i < frclen; i++) {
3309 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3310 && frc[i].flags == frcflags) {
3311 break;
3312 }
3313 }
3314
3315 /* Nothing was found. */
3316 if(i >= frclen) {
3317 if(!font->set)
3318 xloadfontset(font);
3319 fcsets[0] = font->set;
3320
3321 /*
3322 * Nothing was found in the cache. Now use
3323 * some dozen of Fontconfig calls to get the
3324 * font for one single character.
3325 *
3326 * Xft and fontconfig are design failures.
3327 */
3328 fcpattern = FcPatternDuplicate(font->pattern);
3329 fccharset = FcCharSetCreate();
3330
3331 FcCharSetAddChar(fccharset, unicodep);
3332 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3333 fccharset);
3334 FcPatternAddBool(fcpattern, FC_SCALABLE,
3335 FcTrue);
3336
3337 FcConfigSubstitute(0, fcpattern,
3338 FcMatchPattern);
3339 FcDefaultSubstitute(fcpattern);
3340
3341 fontpattern = FcFontSetMatch(0, fcsets,
3342 FcTrue, fcpattern, &fcres);
3343
3344 /*
3345 * Overwrite or create the new cache entry.
3346 */
3347 if(frclen >= LEN(frc)) {
3348 frclen = LEN(frc) - 1;
3349 XftFontClose(xw.dpy, frc[frclen].font);
3350 }
3351
3352 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3353 fontpattern);
3354 frc[frclen].flags = frcflags;
3355
3356 i = frclen;
3357 frclen++;
3358
3359 FcPatternDestroy(fcpattern);
3360 FcCharSetDestroy(fccharset);
3361 }
3362
3363 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3364 xp, winy + frc[i].font->ascent,
3365 (FcChar8 *)u8c, u8cblen);
3366
3367 xp += xw.cw * wcwidth(unicodep);
3368 }
3369
3370 /*
3371 * This is how the loop above actually should be. Why does the
3372 * application have to care about font details?
3373 *
3374 * I have to repeat: Xft and Fontconfig are design failures.
3375 */
3376 /*
3377 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3378 winy + font->ascent, (FcChar8 *)s, bytelen);
3379 */
3380
3381 if(base.mode & ATTR_UNDERLINE) {
3382 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3383 width, 1);
3384 }
3385
3386 if(base.mode & ATTR_STRUCK) {
3387 XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
3388 width, 1);
3389 }
3390
3391 /* Reset clip to none. */
3392 XftDrawSetClip(xw.draw, 0);
3393 }
3394
3395 void
3396 xdrawcursor(void) {
3397 static int oldx = 0, oldy = 0;
3398 int sl, width, curx;
3399 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3400
3401 LIMIT(oldx, 0, term.col-1);
3402 LIMIT(oldy, 0, term.row-1);
3403
3404 curx = term.c.x;
3405
3406 /* adjust position if in dummy */
3407 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3408 oldx--;
3409 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3410 curx--;
3411
3412 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3413
3414 /* remove the old cursor */
3415 sl = utf8len(term.line[oldy][oldx].c);
3416 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3417 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3418 oldy, width, sl);
3419
3420 /* draw the new one */
3421 if(!(IS_SET(MODE_HIDE))) {
3422 if(xw.state & WIN_FOCUSED) {
3423 if(IS_SET(MODE_REVERSE)) {
3424 g.mode |= ATTR_REVERSE;
3425 g.fg = defaultcs;
3426 g.bg = defaultfg;
3427 }
3428
3429 sl = utf8len(g.c);
3430 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3431 ? 2 : 1;
3432 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3433 } else {
3434 XftDrawRect(xw.draw, &dc.col[defaultcs],
3435 borderpx + curx * xw.cw,
3436 borderpx + term.c.y * xw.ch,
3437 xw.cw - 1, 1);
3438 XftDrawRect(xw.draw, &dc.col[defaultcs],
3439 borderpx + curx * xw.cw,
3440 borderpx + term.c.y * xw.ch,
3441 1, xw.ch - 1);
3442 XftDrawRect(xw.draw, &dc.col[defaultcs],
3443 borderpx + (curx + 1) * xw.cw - 1,
3444 borderpx + term.c.y * xw.ch,
3445 1, xw.ch - 1);
3446 XftDrawRect(xw.draw, &dc.col[defaultcs],
3447 borderpx + curx * xw.cw,
3448 borderpx + (term.c.y + 1) * xw.ch - 1,
3449 xw.cw, 1);
3450 }
3451 oldx = curx, oldy = term.c.y;
3452 }
3453 }
3454
3455
3456 void
3457 xsettitle(char *p) {
3458 XTextProperty prop;
3459
3460 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3461 &prop);
3462 XSetWMName(xw.dpy, xw.win, &prop);
3463 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3464 XFree(prop.value);
3465 }
3466
3467 void
3468 xresettitle(void) {
3469 xsettitle(opt_title ? opt_title : "st");
3470 }
3471
3472 void
3473 redraw(int timeout) {
3474 struct timespec tv = {0, timeout * 1000};
3475
3476 tfulldirt();
3477 draw();
3478
3479 if(timeout > 0) {
3480 nanosleep(&tv, NULL);
3481 XSync(xw.dpy, False); /* necessary for a good tput flash */
3482 }
3483 }
3484
3485 void
3486 draw(void) {
3487 drawregion(0, 0, term.col, term.row);
3488 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3489 xw.h, 0, 0);
3490 XSetForeground(xw.dpy, dc.gc,
3491 dc.col[IS_SET(MODE_REVERSE)?
3492 defaultfg : defaultbg].pixel);
3493 }
3494
3495 void
3496 drawregion(int x1, int y1, int x2, int y2) {
3497 int ic, ib, x, y, ox, sl;
3498 Glyph base, new;
3499 char buf[DRAW_BUF_SIZ];
3500 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3501 long unicodep;
3502
3503 if(!(xw.state & WIN_VISIBLE))
3504 return;
3505
3506 for(y = y1; y < y2; y++) {
3507 if(!term.dirty[y])
3508 continue;
3509
3510 xtermclear(0, y, term.col, y);
3511 term.dirty[y] = 0;
3512 base = term.line[y][0];
3513 ic = ib = ox = 0;
3514 for(x = x1; x < x2; x++) {
3515 new = term.line[y][x];
3516 if(new.mode == ATTR_WDUMMY)
3517 continue;
3518 if(ena_sel && selected(x, y))
3519 new.mode ^= ATTR_REVERSE;
3520 if(ib > 0 && (ATTRCMP(base, new)
3521 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3522 xdraws(buf, base, ox, y, ic, ib);
3523 ic = ib = 0;
3524 }
3525 if(ib == 0) {
3526 ox = x;
3527 base = new;
3528 }
3529
3530 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3531 memcpy(buf+ib, new.c, sl);
3532 ib += sl;
3533 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3534 }
3535 if(ib > 0)
3536 xdraws(buf, base, ox, y, ic, ib);
3537 }
3538 xdrawcursor();
3539 }
3540
3541 void
3542 expose(XEvent *ev) {
3543 XExposeEvent *e = &ev->xexpose;
3544
3545 if(xw.state & WIN_REDRAW) {
3546 if(!e->count)
3547 xw.state &= ~WIN_REDRAW;
3548 }
3549 redraw(0);
3550 }
3551
3552 void
3553 visibility(XEvent *ev) {
3554 XVisibilityEvent *e = &ev->xvisibility;
3555
3556 if(e->state == VisibilityFullyObscured) {
3557 xw.state &= ~WIN_VISIBLE;
3558 } else if(!(xw.state & WIN_VISIBLE)) {
3559 /* need a full redraw for next Expose, not just a buf copy */
3560 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3561 }
3562 }
3563
3564 void
3565 unmap(XEvent *ev) {
3566 xw.state &= ~WIN_VISIBLE;
3567 }
3568
3569 void
3570 xsetpointermotion(int set) {
3571 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3572 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3573 }
3574
3575 void
3576 xseturgency(int add) {
3577 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3578
3579 MODBIT(h->flags, add, XUrgencyHint);
3580 XSetWMHints(xw.dpy, xw.win, h);
3581 XFree(h);
3582 }
3583
3584 void
3585 focus(XEvent *ev) {
3586 XFocusChangeEvent *e = &ev->xfocus;
3587
3588 if(e->mode == NotifyGrab)
3589 return;
3590
3591 if(ev->type == FocusIn) {
3592 XSetICFocus(xw.xic);
3593 xw.state |= WIN_FOCUSED;
3594 xseturgency(0);
3595 if(IS_SET(MODE_FOCUS))
3596 ttywrite("\033[I", 3);
3597 } else {
3598 XUnsetICFocus(xw.xic);
3599 xw.state &= ~WIN_FOCUSED;
3600 if(IS_SET(MODE_FOCUS))
3601 ttywrite("\033[O", 3);
3602 }
3603 }
3604
3605 static inline bool
3606 match(uint mask, uint state) {
3607 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3608 }
3609
3610 void
3611 numlock(const Arg *dummy) {
3612 term.numlock ^= 1;
3613 }
3614
3615 char*
3616 kmap(KeySym k, uint state) {
3617 Key *kp;
3618 int i;
3619
3620 /* Check for mapped keys out of X11 function keys. */
3621 for(i = 0; i < LEN(mappedkeys); i++) {
3622 if(mappedkeys[i] == k)
3623 break;
3624 }
3625 if(i == LEN(mappedkeys)) {
3626 if((k & 0xFFFF) < 0xFD00)
3627 return NULL;
3628 }
3629
3630 for(kp = key; kp < key + LEN(key); kp++) {
3631 if(kp->k != k)
3632 continue;
3633
3634 if(!match(kp->mask, state))
3635 continue;
3636
3637 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3638 continue;
3639 if(term.numlock && kp->appkey == 2)
3640 continue;
3641
3642 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3643 continue;
3644
3645 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3646 continue;
3647
3648 return kp->s;
3649 }
3650
3651 return NULL;
3652 }
3653
3654 void
3655 kpress(XEvent *ev) {
3656 XKeyEvent *e = &ev->xkey;
3657 KeySym ksym;
3658 char buf[32], *customkey;
3659 int len;
3660 long c;
3661 Status status;
3662 Shortcut *bp;
3663
3664 if(IS_SET(MODE_KBDLOCK))
3665 return;
3666
3667 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3668 /* 1. shortcuts */
3669 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3670 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3671 bp->func(&(bp->arg));
3672 return;
3673 }
3674 }
3675
3676 /* 2. custom keys from config.h */
3677 if((customkey = kmap(ksym, e->state))) {
3678 ttysend(customkey, strlen(customkey));
3679 return;
3680 }
3681
3682 /* 3. composed string from input method */
3683 if(len == 0)
3684 return;
3685 if(len == 1 && e->state & Mod1Mask) {
3686 if(IS_SET(MODE_8BIT)) {
3687 if(*buf < 0177) {
3688 c = *buf | 0x80;
3689 len = utf8encode(c, buf, UTF_SIZ);
3690 }
3691 } else {
3692 buf[1] = buf[0];
3693 buf[0] = '\033';
3694 len = 2;
3695 }
3696 }
3697 ttysend(buf, len);
3698 }
3699
3700
3701 void
3702 cmessage(XEvent *e) {
3703 /*
3704 * See xembed specs
3705 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3706 */
3707 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3708 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3709 xw.state |= WIN_FOCUSED;
3710 xseturgency(0);
3711 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3712 xw.state &= ~WIN_FOCUSED;
3713 }
3714 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3715 /* Send SIGHUP to shell */
3716 kill(pid, SIGHUP);
3717 exit(EXIT_SUCCESS);
3718 }
3719 }
3720
3721 void
3722 cresize(int width, int height) {
3723 int col, row;
3724
3725 if(width != 0)
3726 xw.w = width;
3727 if(height != 0)
3728 xw.h = height;
3729
3730 col = (xw.w - 2 * borderpx) / xw.cw;
3731 row = (xw.h - 2 * borderpx) / xw.ch;
3732
3733 tresize(col, row);
3734 xresize(col, row);
3735 ttyresize();
3736 }
3737
3738 void
3739 resize(XEvent *e) {
3740 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3741 return;
3742
3743 cresize(e->xconfigure.width, e->xconfigure.height);
3744 }
3745
3746 void
3747 run(void) {
3748 XEvent ev;
3749 int w = xw.w, h = xw.h;
3750 fd_set rfd;
3751 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3752 struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
3753 long deltatime;
3754
3755 /* Waiting for window mapping */
3756 while(1) {
3757 XNextEvent(xw.dpy, &ev);
3758 if(ev.type == ConfigureNotify) {
3759 w = ev.xconfigure.width;
3760 h = ev.xconfigure.height;
3761 } else if(ev.type == MapNotify) {
3762 break;
3763 }
3764 }
3765
3766 ttynew();
3767 cresize(w, h);
3768
3769 clock_gettime(CLOCK_MONOTONIC, &last);
3770 lastblink = last;
3771
3772 for(xev = actionfps;;) {
3773 FD_ZERO(&rfd);
3774 FD_SET(cmdfd, &rfd);
3775 FD_SET(xfd, &rfd);
3776
3777 if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
3778 if(errno == EINTR)
3779 continue;
3780 die("select failed: %s\n", strerror(errno));
3781 }
3782 if(FD_ISSET(cmdfd, &rfd)) {
3783 ttyread();
3784 if(blinktimeout) {
3785 blinkset = tattrset(ATTR_BLINK);
3786 if(!blinkset)
3787 MODBIT(term.mode, 0, MODE_BLINK);
3788 }
3789 }
3790
3791 if(FD_ISSET(xfd, &rfd))
3792 xev = actionfps;
3793
3794 clock_gettime(CLOCK_MONOTONIC, &now);
3795 drawtimeout.tv_sec = 0;
3796 drawtimeout.tv_nsec = (1000/xfps) * 1E6;
3797 tv = &drawtimeout;
3798
3799 dodraw = 0;
3800 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3801 tsetdirtattr(ATTR_BLINK);
3802 term.mode ^= MODE_BLINK;
3803 lastblink = now;
3804 dodraw = 1;
3805 }
3806 deltatime = TIMEDIFF(now, last);
3807 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3808 || deltatime < 0) {
3809 dodraw = 1;
3810 last = now;
3811 }
3812
3813 if(dodraw) {
3814 while(XPending(xw.dpy)) {
3815 XNextEvent(xw.dpy, &ev);
3816 if(XFilterEvent(&ev, None))
3817 continue;
3818 if(handler[ev.type])
3819 (handler[ev.type])(&ev);
3820 }
3821
3822 draw();
3823 XFlush(xw.dpy);
3824
3825 if(xev && !FD_ISSET(xfd, &rfd))
3826 xev--;
3827 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3828 if(blinkset) {
3829 if(TIMEDIFF(now, lastblink) \
3830 > blinktimeout) {
3831 drawtimeout.tv_nsec = 1000;
3832 } else {
3833 drawtimeout.tv_nsec = (1E6 * \
3834 (blinktimeout - \
3835 TIMEDIFF(now,
3836 lastblink)));
3837 }
3838 } else {
3839 tv = NULL;
3840 }
3841 }
3842 }
3843 }
3844 }
3845
3846 void
3847 usage(void) {
3848 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3849 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3850 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3851 }
3852
3853 int
3854 main(int argc, char *argv[]) {
3855 char *titles;
3856 uint cols = 80, rows = 24;
3857
3858 xw.l = xw.t = 0;
3859 xw.isfixed = False;
3860
3861 ARGBEGIN {
3862 case 'a':
3863 allowaltscreen = false;
3864 break;
3865 case 'c':
3866 opt_class = EARGF(usage());
3867 break;
3868 case 'e':
3869 /* eat all remaining arguments */
3870 if(argc > 1) {
3871 opt_cmd = &argv[1];
3872 if(argv[1] != NULL && opt_title == NULL) {
3873 titles = xstrdup(argv[1]);
3874 opt_title = basename(titles);
3875 }
3876 }
3877 goto run;
3878 case 'f':
3879 opt_font = EARGF(usage());
3880 break;
3881 case 'g':
3882 xw.gm = XParseGeometry(EARGF(usage()),
3883 &xw.l, &xw.t, &cols, &rows);
3884 break;
3885 case 'i':
3886 xw.isfixed = True;
3887 break;
3888 case 'o':
3889 opt_io = EARGF(usage());
3890 break;
3891 case 't':
3892 opt_title = EARGF(usage());
3893 break;
3894 case 'w':
3895 opt_embed = EARGF(usage());
3896 break;
3897 case 'v':
3898 default:
3899 usage();
3900 } ARGEND;
3901
3902 run:
3903 setlocale(LC_CTYPE, "");
3904 XSetLocaleModifiers("");
3905 tnew(cols? cols : 1, rows? rows : 1);
3906 xinit();
3907 selinit();
3908 run();
3909
3910 return 0;
3911 }
3912