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Fix for multibyte characters in techo.
[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 LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
74 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
75 #define IS_SET(flag) ((term.mode & (flag)) != 0)
76 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
77 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
78 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
79
80 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
81 #define IS_TRUECOL(x) (1 << 24 & (x))
82 #define TRUERED(x) (((x) & 0xff0000) >> 8)
83 #define TRUEGREEN(x) (((x) & 0xff00))
84 #define TRUEBLUE(x) (((x) & 0xff) << 8)
85
86
87 #define VT102ID "\033[?6c"
88
89 enum glyph_attribute {
90 ATTR_NULL = 0,
91 ATTR_REVERSE = 1,
92 ATTR_UNDERLINE = 2,
93 ATTR_BOLD = 4,
94 ATTR_GFX = 8,
95 ATTR_ITALIC = 16,
96 ATTR_BLINK = 32,
97 ATTR_WRAP = 64,
98 ATTR_WIDE = 128,
99 ATTR_WDUMMY = 256,
100 };
101
102 enum cursor_movement {
103 CURSOR_SAVE,
104 CURSOR_LOAD
105 };
106
107 enum cursor_state {
108 CURSOR_DEFAULT = 0,
109 CURSOR_WRAPNEXT = 1,
110 CURSOR_ORIGIN = 2
111 };
112
113 enum term_mode {
114 MODE_WRAP = 1,
115 MODE_INSERT = 2,
116 MODE_APPKEYPAD = 4,
117 MODE_ALTSCREEN = 8,
118 MODE_CRLF = 16,
119 MODE_MOUSEBTN = 32,
120 MODE_MOUSEMOTION = 64,
121 MODE_REVERSE = 128,
122 MODE_KBDLOCK = 256,
123 MODE_HIDE = 512,
124 MODE_ECHO = 1024,
125 MODE_APPCURSOR = 2048,
126 MODE_MOUSESGR = 4096,
127 MODE_8BIT = 8192,
128 MODE_BLINK = 16384,
129 MODE_FBLINK = 32768,
130 MODE_FOCUS = 65536,
131 MODE_MOUSEX10 = 131072,
132 MODE_MOUSEMANY = 262144,
133 MODE_BRCKTPASTE = 524288,
134 MODE_PRINT = 1048576,
135 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
136 |MODE_MOUSEMANY,
137 };
138
139 enum charset {
140 CS_GRAPHIC0,
141 CS_GRAPHIC1,
142 CS_UK,
143 CS_USA,
144 CS_MULTI,
145 CS_GER,
146 CS_FIN
147 };
148
149 enum escape_state {
150 ESC_START = 1,
151 ESC_CSI = 2,
152 ESC_STR = 4, /* DCS, OSC, PM, APC */
153 ESC_ALTCHARSET = 8,
154 ESC_STR_END = 16, /* a final string was encountered */
155 ESC_TEST = 32, /* Enter in test mode */
156 };
157
158 enum window_state {
159 WIN_VISIBLE = 1,
160 WIN_REDRAW = 2,
161 WIN_FOCUSED = 4
162 };
163
164 enum selection_type {
165 SEL_REGULAR = 1,
166 SEL_RECTANGULAR = 2
167 };
168
169 enum selection_snap {
170 SNAP_WORD = 1,
171 SNAP_LINE = 2
172 };
173
174 typedef unsigned char uchar;
175 typedef unsigned int uint;
176 typedef unsigned long ulong;
177 typedef unsigned short ushort;
178
179 typedef XftDraw *Draw;
180 typedef XftColor Colour;
181 typedef Colormap Colourmap;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode;
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colourmap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int l, t; /* left and top offset */
254 int gm; /* geometry mask */
255 int tw, th; /* tty width and height */
256 int w, h; /* window width and height */
257 int ch; /* char height */
258 int cw; /* char width */
259 char state; /* focus, redraw, visible */
260 } XWindow;
261
262 typedef struct {
263 uint b;
264 uint mask;
265 char *s;
266 } Mousekey;
267
268 typedef struct {
269 KeySym k;
270 uint mask;
271 char *s;
272 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
273 signed char appkey; /* application keypad */
274 signed char appcursor; /* application cursor */
275 signed char crlf; /* crlf mode */
276 } Key;
277
278 typedef struct {
279 int mode;
280 int type;
281 int snap;
282 /*
283 * Selection variables:
284 * nb – normalized coordinates of the beginning of the selection
285 * ne – normalized coordinates of the end of the selection
286 * ob – original coordinates of the beginning of the selection
287 * oe – original coordinates of the end of the selection
288 */
289 struct {
290 int x, y;
291 } nb, ne, ob, oe;
292
293 char *clip;
294 Atom xtarget;
295 bool alt;
296 struct timeval tclick1;
297 struct timeval tclick2;
298 } Selection;
299
300 typedef union {
301 int i;
302 uint ui;
303 float f;
304 const void *v;
305 } Arg;
306
307 typedef struct {
308 uint mod;
309 KeySym keysym;
310 void (*func)(const Arg *);
311 const Arg arg;
312 } Shortcut;
313
314 /* function definitions used in config.h */
315 static void clippaste(const Arg *);
316 static void numlock(const Arg *);
317 static void selpaste(const Arg *);
318 static void xzoom(const Arg *);
319 static void printsel(const Arg *);
320 static void printscreen(const Arg *) ;
321 static void toggleprinter(const Arg *);
322
323 /* Config.h for applying patches and the configuration. */
324 #include "config.h"
325
326 /* Font structure */
327 typedef struct {
328 int height;
329 int width;
330 int ascent;
331 int descent;
332 short lbearing;
333 short rbearing;
334 XftFont *match;
335 FcFontSet *set;
336 FcPattern *pattern;
337 } Font;
338
339 /* Drawing Context */
340 typedef struct {
341 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
342 Font font, bfont, ifont, ibfont;
343 GC gc;
344 } DC;
345
346 static void die(const char *, ...);
347 static void draw(void);
348 static void redraw(int);
349 static void drawregion(int, int, int, int);
350 static void execsh(void);
351 static void sigchld(int);
352 static void run(void);
353
354 static void csidump(void);
355 static void csihandle(void);
356 static void csiparse(void);
357 static void csireset(void);
358 static void strdump(void);
359 static void strhandle(void);
360 static void strparse(void);
361 static void strreset(void);
362
363 static int tattrset(int);
364 static void tprinter(char *, size_t);
365 static void tdumpsel(void);
366 static void tdumpline(int);
367 static void tdump(void);
368 static void tclearregion(int, int, int, int);
369 static void tcursor(int);
370 static void tdeletechar(int);
371 static void tdeleteline(int);
372 static void tinsertblank(int);
373 static void tinsertblankline(int);
374 static void tmoveto(int, int);
375 static void tmoveato(int, int);
376 static void tnew(int, int);
377 static void tnewline(int);
378 static void tputtab(int);
379 static void tputc(char *, int);
380 static void treset(void);
381 static int tresize(int, int);
382 static void tscrollup(int, int);
383 static void tscrolldown(int, int);
384 static void tsetattr(int *, int);
385 static void tsetchar(char *, Glyph *, int, int);
386 static void tsetscroll(int, int);
387 static void tswapscreen(void);
388 static void tsetdirt(int, int);
389 static void tsetdirtattr(int);
390 static void tsetmode(bool, bool, int *, int);
391 static void tfulldirt(void);
392 static void techo(char *, int);
393 static int32_t tdefcolor(int *, int *, int);
394 static void tselcs(void);
395 static void tdeftran(char);
396 static inline bool match(uint, uint);
397 static void ttynew(void);
398 static void ttyread(void);
399 static void ttyresize(void);
400 static void ttysend(char *, size_t);
401 static void ttywrite(const char *, size_t);
402
403 static void xdraws(char *, Glyph, int, int, int, int);
404 static void xhints(void);
405 static void xclear(int, int, int, int);
406 static void xdrawcursor(void);
407 static void xinit(void);
408 static void xloadcols(void);
409 static int xsetcolorname(int, const char *);
410 static int xgeommasktogravity(int);
411 static int xloadfont(Font *, FcPattern *);
412 static void xloadfonts(char *, double);
413 static int xloadfontset(Font *);
414 static void xsettitle(char *);
415 static void xresettitle(void);
416 static void xsetpointermotion(int);
417 static void xseturgency(int);
418 static void xsetsel(char *);
419 static void xtermclear(int, int, int, int);
420 static void xunloadfont(Font *);
421 static void xunloadfonts(void);
422 static void xresize(int, int);
423
424 static void expose(XEvent *);
425 static void visibility(XEvent *);
426 static void unmap(XEvent *);
427 static char *kmap(KeySym, uint);
428 static void kpress(XEvent *);
429 static void cmessage(XEvent *);
430 static void cresize(int, int);
431 static void resize(XEvent *);
432 static void focus(XEvent *);
433 static void brelease(XEvent *);
434 static void bpress(XEvent *);
435 static void bmotion(XEvent *);
436 static void selnotify(XEvent *);
437 static void selclear(XEvent *);
438 static void selrequest(XEvent *);
439
440 static void selinit(void);
441 static void selsort(void);
442 static inline bool selected(int, int);
443 static char *getsel(void);
444 static void selcopy(void);
445 static void selscroll(int, int);
446 static void selsnap(int, int *, int *, int);
447
448 static size_t utf8decode(char *, long *, size_t);
449 static long utf8decodebyte(char, size_t *);
450 static size_t utf8encode(long, char *, size_t);
451 static char utf8encodebyte(long, size_t);
452 static size_t utf8len(char *);
453 static size_t utf8validate(long *, size_t);
454
455 static ssize_t xwrite(int, const char *, size_t);
456 static void *xmalloc(size_t);
457 static void *xrealloc(void *, size_t);
458 static char *xstrdup(char *);
459
460 static void (*handler[LASTEvent])(XEvent *) = {
461 [KeyPress] = kpress,
462 [ClientMessage] = cmessage,
463 [ConfigureNotify] = resize,
464 [VisibilityNotify] = visibility,
465 [UnmapNotify] = unmap,
466 [Expose] = expose,
467 [FocusIn] = focus,
468 [FocusOut] = focus,
469 [MotionNotify] = bmotion,
470 [ButtonPress] = bpress,
471 [ButtonRelease] = brelease,
472 [SelectionClear] = selclear,
473 [SelectionNotify] = selnotify,
474 [SelectionRequest] = selrequest,
475 };
476
477 /* Globals */
478 static DC dc;
479 static XWindow xw;
480 static Term term;
481 static CSIEscape csiescseq;
482 static STREscape strescseq;
483 static int cmdfd;
484 static pid_t pid;
485 static Selection sel;
486 static int iofd = STDOUT_FILENO;
487 static char **opt_cmd = NULL;
488 static char *opt_io = NULL;
489 static char *opt_title = NULL;
490 static char *opt_embed = NULL;
491 static char *opt_class = NULL;
492 static char *opt_font = NULL;
493 static int oldbutton = 3; /* button event on startup: 3 = release */
494
495 static char *usedfont = NULL;
496 static double usedfontsize = 0;
497
498 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
499 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
500 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
501 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
502
503 /* Font Ring Cache */
504 enum {
505 FRC_NORMAL,
506 FRC_ITALIC,
507 FRC_BOLD,
508 FRC_ITALICBOLD
509 };
510
511 typedef struct {
512 XftFont *font;
513 int flags;
514 } Fontcache;
515
516 /* Fontcache is an array now. A new font will be appended to the array. */
517 static Fontcache frc[16];
518 static int frclen = 0;
519
520 ssize_t
521 xwrite(int fd, const char *s, size_t len) {
522 size_t aux = len;
523
524 while(len > 0) {
525 ssize_t r = write(fd, s, len);
526 if(r < 0)
527 return r;
528 len -= r;
529 s += r;
530 }
531 return aux;
532 }
533
534 void *
535 xmalloc(size_t len) {
536 void *p = malloc(len);
537
538 if(!p)
539 die("Out of memory\n");
540
541 return p;
542 }
543
544 void *
545 xrealloc(void *p, size_t len) {
546 if((p = realloc(p, len)) == NULL)
547 die("Out of memory\n");
548
549 return p;
550 }
551
552 char *
553 xstrdup(char *s) {
554 if((s = strdup(s)) == NULL)
555 die("Out of memory\n");
556
557 return s;
558 }
559
560 size_t
561 utf8decode(char *c, long *u, size_t clen) {
562 size_t i, j, len, type;
563 long udecoded;
564
565 *u = UTF_INVALID;
566 if(!clen)
567 return 0;
568 udecoded = utf8decodebyte(c[0], &len);
569 if(!BETWEEN(len, 1, UTF_SIZ))
570 return 1;
571 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
572 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
573 if(type != 0)
574 return j;
575 }
576 if(j < len)
577 return 0;
578 *u = udecoded;
579 utf8validate(u, len);
580 return len;
581 }
582
583 long
584 utf8decodebyte(char c, size_t *i) {
585 for(*i = 0; *i < LEN(utfmask); ++(*i))
586 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
587 return (uchar)c & ~utfmask[*i];
588 return 0;
589 }
590
591 size_t
592 utf8encode(long u, char *c, size_t clen) {
593 size_t len, i;
594
595 len = utf8validate(&u, 0);
596 if(clen < len)
597 return 0;
598 for(i = len - 1; i != 0; --i) {
599 c[i] = utf8encodebyte(u, 0);
600 u >>= 6;
601 }
602 c[0] = utf8encodebyte(u, len);
603 return len;
604 }
605
606 char
607 utf8encodebyte(long u, size_t i) {
608 return utfbyte[i] | (u & ~utfmask[i]);
609 }
610
611 size_t
612 utf8len(char *c) {
613 return utf8decode(c, &(long){0}, UTF_SIZ);
614 }
615
616 size_t
617 utf8validate(long *u, size_t i) {
618 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
619 *u = UTF_INVALID;
620 for(i = 1; *u > utfmax[i]; ++i)
621 ;
622 return i;
623 }
624
625 static void
626 selinit(void) {
627 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
628 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
629 sel.mode = 0;
630 sel.ob.x = -1;
631 sel.clip = NULL;
632 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
633 if(sel.xtarget == None)
634 sel.xtarget = XA_STRING;
635 }
636
637 static int
638 x2col(int x) {
639 x -= borderpx;
640 x /= xw.cw;
641
642 return LIMIT(x, 0, term.col-1);
643 }
644
645 static int
646 y2row(int y) {
647 y -= borderpx;
648 y /= xw.ch;
649
650 return LIMIT(y, 0, term.row-1);
651 }
652
653 static void
654 selsort(void) {
655 if(sel.ob.y == sel.oe.y) {
656 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
657 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
658 } else {
659 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
660 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
661 }
662 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
663 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
664 }
665
666 static inline bool
667 selected(int x, int y) {
668 if(sel.ne.y == y && sel.nb.y == y)
669 return BETWEEN(x, sel.nb.x, sel.ne.x);
670
671 if(sel.type == SEL_RECTANGULAR) {
672 return ((sel.nb.y <= y && y <= sel.ne.y)
673 && (sel.nb.x <= x && x <= sel.ne.x));
674 }
675
676 return ((sel.nb.y < y && y < sel.ne.y)
677 || (y == sel.ne.y && x <= sel.ne.x))
678 || (y == sel.nb.y && x >= sel.nb.x
679 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
680 }
681
682 void
683 selsnap(int mode, int *x, int *y, int direction) {
684 int i;
685
686 switch(mode) {
687 case SNAP_WORD:
688 /*
689 * Snap around if the word wraps around at the end or
690 * beginning of a line.
691 */
692 for(;;) {
693 if(direction < 0 && *x <= 0) {
694 if(*y > 0 && term.line[*y - 1][term.col-1].mode
695 & ATTR_WRAP) {
696 *y -= 1;
697 *x = term.col-1;
698 } else {
699 break;
700 }
701 }
702 if(direction > 0 && *x >= term.col-1) {
703 if(*y < term.row-1 && term.line[*y][*x].mode
704 & ATTR_WRAP) {
705 *y += 1;
706 *x = 0;
707 } else {
708 break;
709 }
710 }
711
712 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
713 *x += direction;
714 continue;
715 }
716
717 if(strchr(worddelimiters,
718 term.line[*y][*x+direction].c[0])) {
719 break;
720 }
721
722 *x += direction;
723 }
724 break;
725 case SNAP_LINE:
726 /*
727 * Snap around if the the previous line or the current one
728 * has set ATTR_WRAP at its end. Then the whole next or
729 * previous line will be selected.
730 */
731 *x = (direction < 0) ? 0 : term.col - 1;
732 if(direction < 0 && *y > 0) {
733 for(; *y > 0; *y += direction) {
734 if(!(term.line[*y-1][term.col-1].mode
735 & ATTR_WRAP)) {
736 break;
737 }
738 }
739 } else if(direction > 0 && *y < term.row-1) {
740 for(; *y < term.row; *y += direction) {
741 if(!(term.line[*y][term.col-1].mode
742 & ATTR_WRAP)) {
743 break;
744 }
745 }
746 }
747 break;
748 default:
749 /*
750 * Select the whole line when the end of line is reached.
751 */
752 if(direction > 0) {
753 i = term.col;
754 while(--i > 0 && term.line[*y][i].c[0] == ' ')
755 /* nothing */;
756 if(i > 0 && i < *x)
757 *x = term.col - 1;
758 }
759 break;
760 }
761 }
762
763 void
764 getbuttoninfo(XEvent *e) {
765 int type;
766 uint state = e->xbutton.state &~Button1Mask;
767
768 sel.alt = IS_SET(MODE_ALTSCREEN);
769
770 sel.oe.x = x2col(e->xbutton.x);
771 sel.oe.y = y2row(e->xbutton.y);
772
773 if(sel.ob.y < sel.oe.y
774 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
775 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
776 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
777 } else {
778 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
779 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
780 }
781 selsort();
782
783 sel.type = SEL_REGULAR;
784 for(type = 1; type < LEN(selmasks); ++type) {
785 if(match(selmasks[type], state)) {
786 sel.type = type;
787 break;
788 }
789 }
790 }
791
792 void
793 mousereport(XEvent *e) {
794 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
795 button = e->xbutton.button, state = e->xbutton.state,
796 len;
797 char buf[40];
798 static int ox, oy;
799
800 /* from urxvt */
801 if(e->xbutton.type == MotionNotify) {
802 if(x == ox && y == oy)
803 return;
804 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
805 return;
806 /* MOUSE_MOTION: no reporting if no button is pressed */
807 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
808 return;
809
810 button = oldbutton + 32;
811 ox = x;
812 oy = y;
813 } else {
814 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
815 button = 3;
816 } else {
817 button -= Button1;
818 if(button >= 3)
819 button += 64 - 3;
820 }
821 if(e->xbutton.type == ButtonPress) {
822 oldbutton = button;
823 ox = x;
824 oy = y;
825 } else if(e->xbutton.type == ButtonRelease) {
826 oldbutton = 3;
827 /* MODE_MOUSEX10: no button release reporting */
828 if(IS_SET(MODE_MOUSEX10))
829 return;
830 }
831 }
832
833 if(!IS_SET(MODE_MOUSEX10)) {
834 button += (state & ShiftMask ? 4 : 0)
835 + (state & Mod4Mask ? 8 : 0)
836 + (state & ControlMask ? 16 : 0);
837 }
838
839 len = 0;
840 if(IS_SET(MODE_MOUSESGR)) {
841 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
842 button, x+1, y+1,
843 e->xbutton.type == ButtonRelease ? 'm' : 'M');
844 } else if(x < 223 && y < 223) {
845 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
846 32+button, 32+x+1, 32+y+1);
847 } else {
848 return;
849 }
850
851 ttywrite(buf, len);
852 }
853
854 void
855 bpress(XEvent *e) {
856 struct timeval now;
857 Mousekey *mk;
858
859 if(IS_SET(MODE_MOUSE)) {
860 mousereport(e);
861 return;
862 }
863
864 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
865 if(e->xbutton.button == mk->b
866 && match(mk->mask, e->xbutton.state)) {
867 ttysend(mk->s, strlen(mk->s));
868 return;
869 }
870 }
871
872 if(e->xbutton.button == Button1) {
873 gettimeofday(&now, NULL);
874
875 /* Clear previous selection, logically and visually. */
876 selclear(NULL);
877 sel.mode = 1;
878 sel.type = SEL_REGULAR;
879 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
880 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
881
882 /*
883 * If the user clicks below predefined timeouts specific
884 * snapping behaviour is exposed.
885 */
886 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
887 sel.snap = SNAP_LINE;
888 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
889 sel.snap = SNAP_WORD;
890 } else {
891 sel.snap = 0;
892 }
893 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
894 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
895 selsort();
896
897 /*
898 * Draw selection, unless it's regular and we don't want to
899 * make clicks visible
900 */
901 if(sel.snap != 0) {
902 sel.mode++;
903 tsetdirt(sel.nb.y, sel.ne.y);
904 }
905 sel.tclick2 = sel.tclick1;
906 sel.tclick1 = now;
907 }
908 }
909
910 char *
911 getsel(void) {
912 char *str, *ptr;
913 int x, y, bufsize, size, i, ex;
914 Glyph *gp, *last;
915
916 if(sel.ob.x == -1) {
917 str = NULL;
918 } else {
919 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
920 ptr = str = xmalloc(bufsize);
921
922 /* append every set & selected glyph to the selection */
923 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
924 gp = &term.line[y][0];
925 last = &gp[term.col-1];
926
927 while(last >= gp && !(selected(last - gp, y) &&
928 strcmp(last->c, " ") != 0)) {
929 --last;
930 }
931
932 for(x = 0; gp <= last; x++, ++gp) {
933 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
934 continue;
935
936 size = utf8len(gp->c);
937 memcpy(ptr, gp->c, size);
938 ptr += size;
939 }
940
941 /*
942 * Copy and pasting of line endings is inconsistent
943 * in the inconsistent terminal and GUI world.
944 * The best solution seems like to produce '\n' when
945 * something is copied from st and convert '\n' to
946 * '\r', when something to be pasted is received by
947 * st.
948 * FIXME: Fix the computer world.
949 */
950 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
951 *ptr++ = '\n';
952
953 /*
954 * If the last selected line expands in the selection
955 * after the visible text '\n' is appended.
956 */
957 if(y == sel.ne.y) {
958 i = term.col;
959 while(--i > 0 && term.line[y][i].c[0] == ' ')
960 /* nothing */;
961 ex = sel.ne.x;
962 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
963 ex = sel.nb.x;
964 if(i < ex)
965 *ptr++ = '\n';
966 }
967 }
968 *ptr = 0;
969 }
970 return str;
971 }
972
973 void
974 selcopy(void) {
975 xsetsel(getsel());
976 }
977
978 void
979 selnotify(XEvent *e) {
980 ulong nitems, ofs, rem;
981 int format;
982 uchar *data, *last, *repl;
983 Atom type;
984
985 ofs = 0;
986 do {
987 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
988 False, AnyPropertyType, &type, &format,
989 &nitems, &rem, &data)) {
990 fprintf(stderr, "Clipboard allocation failed\n");
991 return;
992 }
993
994 /*
995 * As seen in getsel:
996 * Line endings are inconsistent in the terminal and GUI world
997 * copy and pasting. When receiving some selection data,
998 * replace all '\n' with '\r'.
999 * FIXME: Fix the computer world.
1000 */
1001 repl = data;
1002 last = data + nitems * format / 8;
1003 while((repl = memchr(repl, '\n', last - repl))) {
1004 *repl++ = '\r';
1005 }
1006
1007 if(IS_SET(MODE_BRCKTPASTE))
1008 ttywrite("\033[200~", 6);
1009 ttysend((char *)data, nitems * format / 8);
1010 if(IS_SET(MODE_BRCKTPASTE))
1011 ttywrite("\033[201~", 6);
1012 XFree(data);
1013 /* number of 32-bit chunks returned */
1014 ofs += nitems * format / 32;
1015 } while(rem > 0);
1016 }
1017
1018 void
1019 selpaste(const Arg *dummy) {
1020 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1021 xw.win, CurrentTime);
1022 }
1023
1024 void
1025 clippaste(const Arg *dummy) {
1026 Atom clipboard;
1027
1028 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1029 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1030 xw.win, CurrentTime);
1031 }
1032
1033 void
1034 selclear(XEvent *e) {
1035 if(sel.ob.x == -1)
1036 return;
1037 sel.ob.x = -1;
1038 tsetdirt(sel.nb.y, sel.ne.y);
1039 }
1040
1041 void
1042 selrequest(XEvent *e) {
1043 XSelectionRequestEvent *xsre;
1044 XSelectionEvent xev;
1045 Atom xa_targets, string;
1046
1047 xsre = (XSelectionRequestEvent *) e;
1048 xev.type = SelectionNotify;
1049 xev.requestor = xsre->requestor;
1050 xev.selection = xsre->selection;
1051 xev.target = xsre->target;
1052 xev.time = xsre->time;
1053 /* reject */
1054 xev.property = None;
1055
1056 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1057 if(xsre->target == xa_targets) {
1058 /* respond with the supported type */
1059 string = sel.xtarget;
1060 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1061 XA_ATOM, 32, PropModeReplace,
1062 (uchar *) &string, 1);
1063 xev.property = xsre->property;
1064 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1065 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1066 xsre->target, 8, PropModeReplace,
1067 (uchar *) sel.clip, strlen(sel.clip));
1068 xev.property = xsre->property;
1069 }
1070
1071 /* all done, send a notification to the listener */
1072 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1073 fprintf(stderr, "Error sending SelectionNotify event\n");
1074 }
1075
1076 void
1077 xsetsel(char *str) {
1078 /* register the selection for both the clipboard and the primary */
1079 Atom clipboard;
1080
1081 free(sel.clip);
1082 sel.clip = str;
1083
1084 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1085
1086 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1087 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1088 }
1089
1090 void
1091 brelease(XEvent *e) {
1092 if(IS_SET(MODE_MOUSE)) {
1093 mousereport(e);
1094 return;
1095 }
1096
1097 if(e->xbutton.button == Button2) {
1098 selpaste(NULL);
1099 } else if(e->xbutton.button == Button1) {
1100 if(sel.mode < 2) {
1101 selclear(NULL);
1102 } else {
1103 getbuttoninfo(e);
1104 selcopy();
1105 }
1106 sel.mode = 0;
1107 tsetdirt(sel.nb.y, sel.ne.y);
1108 }
1109 }
1110
1111 void
1112 bmotion(XEvent *e) {
1113 int oldey, oldex, oldsby, oldsey;
1114
1115 if(IS_SET(MODE_MOUSE)) {
1116 mousereport(e);
1117 return;
1118 }
1119
1120 if(!sel.mode)
1121 return;
1122
1123 sel.mode++;
1124 oldey = sel.oe.y;
1125 oldex = sel.oe.x;
1126 oldsby = sel.nb.y;
1127 oldsey = sel.ne.y;
1128 getbuttoninfo(e);
1129
1130 if(oldey != sel.oe.y || oldex != sel.oe.x)
1131 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1132 }
1133
1134 void
1135 die(const char *errstr, ...) {
1136 va_list ap;
1137
1138 va_start(ap, errstr);
1139 vfprintf(stderr, errstr, ap);
1140 va_end(ap);
1141 exit(EXIT_FAILURE);
1142 }
1143
1144 void
1145 execsh(void) {
1146 char **args;
1147 char *envshell = getenv("SHELL");
1148 const struct passwd *pass = getpwuid(getuid());
1149 char buf[sizeof(long) * 8 + 1];
1150
1151 unsetenv("COLUMNS");
1152 unsetenv("LINES");
1153 unsetenv("TERMCAP");
1154
1155 if(pass) {
1156 setenv("LOGNAME", pass->pw_name, 1);
1157 setenv("USER", pass->pw_name, 1);
1158 setenv("SHELL", pass->pw_shell, 0);
1159 setenv("HOME", pass->pw_dir, 0);
1160 }
1161
1162 snprintf(buf, sizeof(buf), "%lu", xw.win);
1163 setenv("WINDOWID", buf, 1);
1164
1165 signal(SIGCHLD, SIG_DFL);
1166 signal(SIGHUP, SIG_DFL);
1167 signal(SIGINT, SIG_DFL);
1168 signal(SIGQUIT, SIG_DFL);
1169 signal(SIGTERM, SIG_DFL);
1170 signal(SIGALRM, SIG_DFL);
1171
1172 DEFAULT(envshell, shell);
1173 setenv("TERM", termname, 1);
1174 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1175 execvp(args[0], args);
1176 exit(EXIT_FAILURE);
1177 }
1178
1179 void
1180 sigchld(int a) {
1181 int stat = 0;
1182
1183 if(waitpid(pid, &stat, 0) < 0)
1184 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1185
1186 if(WIFEXITED(stat)) {
1187 exit(WEXITSTATUS(stat));
1188 } else {
1189 exit(EXIT_FAILURE);
1190 }
1191 }
1192
1193 void
1194 ttynew(void) {
1195 int m, s;
1196 struct winsize w = {term.row, term.col, 0, 0};
1197
1198 /* seems to work fine on linux, openbsd and freebsd */
1199 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1200 die("openpty failed: %s\n", strerror(errno));
1201
1202 switch(pid = fork()) {
1203 case -1:
1204 die("fork failed\n");
1205 break;
1206 case 0:
1207 setsid(); /* create a new process group */
1208 dup2(s, STDIN_FILENO);
1209 dup2(s, STDOUT_FILENO);
1210 dup2(s, STDERR_FILENO);
1211 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1212 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1213 close(s);
1214 close(m);
1215 execsh();
1216 break;
1217 default:
1218 close(s);
1219 cmdfd = m;
1220 signal(SIGCHLD, sigchld);
1221 if(opt_io) {
1222 term.mode |= MODE_PRINT;
1223 iofd = (!strcmp(opt_io, "-")) ?
1224 STDOUT_FILENO :
1225 open(opt_io, O_WRONLY | O_CREAT, 0666);
1226 if(iofd < 0) {
1227 fprintf(stderr, "Error opening %s:%s\n",
1228 opt_io, strerror(errno));
1229 }
1230 }
1231 }
1232 }
1233
1234 void
1235 dump(char c) {
1236 static int col;
1237
1238 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1239 if(++col % 10 == 0)
1240 fprintf(stderr, "\n");
1241 }
1242
1243 void
1244 ttyread(void) {
1245 static char buf[BUFSIZ];
1246 static int buflen = 0;
1247 char *ptr;
1248 char s[UTF_SIZ];
1249 int charsize; /* size of utf8 char in bytes */
1250 long unicodep;
1251 int ret;
1252
1253 /* append read bytes to unprocessed bytes */
1254 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1255 die("Couldn't read from shell: %s\n", strerror(errno));
1256
1257 /* process every complete utf8 char */
1258 buflen += ret;
1259 ptr = buf;
1260 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1261 utf8encode(unicodep, s, UTF_SIZ);
1262 tputc(s, charsize);
1263 ptr += charsize;
1264 buflen -= charsize;
1265 }
1266
1267 /* keep any uncomplete utf8 char for the next call */
1268 memmove(buf, ptr, buflen);
1269 }
1270
1271 void
1272 ttywrite(const char *s, size_t n) {
1273 if(xwrite(cmdfd, s, n) == -1)
1274 die("write error on tty: %s\n", strerror(errno));
1275 }
1276
1277 void
1278 ttysend(char *s, size_t n) {
1279 ttywrite(s, n);
1280 if(IS_SET(MODE_ECHO))
1281 techo(s, n);
1282 }
1283
1284 void
1285 ttyresize(void) {
1286 struct winsize w;
1287
1288 w.ws_row = term.row;
1289 w.ws_col = term.col;
1290 w.ws_xpixel = xw.tw;
1291 w.ws_ypixel = xw.th;
1292 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1293 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1294 }
1295
1296 int
1297 tattrset(int attr) {
1298 int i, j;
1299
1300 for(i = 0; i < term.row-1; i++) {
1301 for(j = 0; j < term.col-1; j++) {
1302 if(term.line[i][j].mode & attr)
1303 return 1;
1304 }
1305 }
1306
1307 return 0;
1308 }
1309
1310 void
1311 tsetdirt(int top, int bot) {
1312 int i;
1313
1314 LIMIT(top, 0, term.row-1);
1315 LIMIT(bot, 0, term.row-1);
1316
1317 for(i = top; i <= bot; i++)
1318 term.dirty[i] = 1;
1319 }
1320
1321 void
1322 tsetdirtattr(int attr) {
1323 int i, j;
1324
1325 for(i = 0; i < term.row-1; i++) {
1326 for(j = 0; j < term.col-1; j++) {
1327 if(term.line[i][j].mode & attr) {
1328 tsetdirt(i, i);
1329 break;
1330 }
1331 }
1332 }
1333 }
1334
1335 void
1336 tfulldirt(void) {
1337 tsetdirt(0, term.row-1);
1338 }
1339
1340 void
1341 tcursor(int mode) {
1342 static TCursor c[2];
1343 bool alt = IS_SET(MODE_ALTSCREEN);
1344
1345 if(mode == CURSOR_SAVE) {
1346 c[alt] = term.c;
1347 } else if(mode == CURSOR_LOAD) {
1348 term.c = c[alt];
1349 tmoveto(c[alt].x, c[alt].y);
1350 }
1351 }
1352
1353 void
1354 treset(void) {
1355 uint i;
1356
1357 term.c = (TCursor){{
1358 .mode = ATTR_NULL,
1359 .fg = defaultfg,
1360 .bg = defaultbg
1361 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1362
1363 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1364 for(i = tabspaces; i < term.col; i += tabspaces)
1365 term.tabs[i] = 1;
1366 term.top = 0;
1367 term.bot = term.row - 1;
1368 term.mode = MODE_WRAP;
1369 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1370 term.charset = 0;
1371
1372 tclearregion(0, 0, term.col-1, term.row-1);
1373 tmoveto(0, 0);
1374 tcursor(CURSOR_SAVE);
1375 }
1376
1377 void
1378 tnew(int col, int row) {
1379 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1380 tresize(col, row);
1381 term.numlock = 1;
1382
1383 treset();
1384 }
1385
1386 void
1387 tswapscreen(void) {
1388 Line *tmp = term.line;
1389
1390 term.line = term.alt;
1391 term.alt = tmp;
1392 term.mode ^= MODE_ALTSCREEN;
1393 tfulldirt();
1394 }
1395
1396 void
1397 tscrolldown(int orig, int n) {
1398 int i;
1399 Line temp;
1400
1401 LIMIT(n, 0, term.bot-orig+1);
1402
1403 tsetdirt(orig, term.bot-n);
1404 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1405
1406 for(i = term.bot; i >= orig+n; i--) {
1407 temp = term.line[i];
1408 term.line[i] = term.line[i-n];
1409 term.line[i-n] = temp;
1410 }
1411
1412 selscroll(orig, n);
1413 }
1414
1415 void
1416 tscrollup(int orig, int n) {
1417 int i;
1418 Line temp;
1419
1420 LIMIT(n, 0, term.bot-orig+1);
1421
1422 tclearregion(0, orig, term.col-1, orig+n-1);
1423 tsetdirt(orig+n, term.bot);
1424
1425 for(i = orig; i <= term.bot-n; i++) {
1426 temp = term.line[i];
1427 term.line[i] = term.line[i+n];
1428 term.line[i+n] = temp;
1429 }
1430
1431 selscroll(orig, -n);
1432 }
1433
1434 void
1435 selscroll(int orig, int n) {
1436 if(sel.ob.x == -1)
1437 return;
1438
1439 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1440 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1441 selclear(NULL);
1442 return;
1443 }
1444 if(sel.type == SEL_RECTANGULAR) {
1445 if(sel.ob.y < term.top)
1446 sel.ob.y = term.top;
1447 if(sel.oe.y > term.bot)
1448 sel.oe.y = term.bot;
1449 } else {
1450 if(sel.ob.y < term.top) {
1451 sel.ob.y = term.top;
1452 sel.ob.x = 0;
1453 }
1454 if(sel.oe.y > term.bot) {
1455 sel.oe.y = term.bot;
1456 sel.oe.x = term.col;
1457 }
1458 }
1459 selsort();
1460 }
1461 }
1462
1463 void
1464 tnewline(int first_col) {
1465 int y = term.c.y;
1466
1467 if(y == term.bot) {
1468 tscrollup(term.top, 1);
1469 } else {
1470 y++;
1471 }
1472 tmoveto(first_col ? 0 : term.c.x, y);
1473 }
1474
1475 void
1476 csiparse(void) {
1477 char *p = csiescseq.buf, *np;
1478 long int v;
1479
1480 csiescseq.narg = 0;
1481 if(*p == '?') {
1482 csiescseq.priv = 1;
1483 p++;
1484 }
1485
1486 csiescseq.buf[csiescseq.len] = '\0';
1487 while(p < csiescseq.buf+csiescseq.len) {
1488 np = NULL;
1489 v = strtol(p, &np, 10);
1490 if(np == p)
1491 v = 0;
1492 if(v == LONG_MAX || v == LONG_MIN)
1493 v = -1;
1494 csiescseq.arg[csiescseq.narg++] = v;
1495 p = np;
1496 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1497 break;
1498 p++;
1499 }
1500 csiescseq.mode = *p;
1501 }
1502
1503 /* for absolute user moves, when decom is set */
1504 void
1505 tmoveato(int x, int y) {
1506 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1507 }
1508
1509 void
1510 tmoveto(int x, int y) {
1511 int miny, maxy;
1512
1513 if(term.c.state & CURSOR_ORIGIN) {
1514 miny = term.top;
1515 maxy = term.bot;
1516 } else {
1517 miny = 0;
1518 maxy = term.row - 1;
1519 }
1520 LIMIT(x, 0, term.col-1);
1521 LIMIT(y, miny, maxy);
1522 term.c.state &= ~CURSOR_WRAPNEXT;
1523 term.c.x = x;
1524 term.c.y = y;
1525 }
1526
1527 void
1528 tsetchar(char *c, Glyph *attr, int x, int y) {
1529 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1530 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1531 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1532 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1533 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1534 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1535 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1536 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1537 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1538 };
1539
1540 /*
1541 * The table is proudly stolen from rxvt.
1542 */
1543 if(attr->mode & ATTR_GFX) {
1544 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1545 c = vt100_0[c[0] - 0x41];
1546 }
1547 }
1548
1549 if(term.line[y][x].mode & ATTR_WIDE) {
1550 if(x+1 < term.col) {
1551 term.line[y][x+1].c[0] = ' ';
1552 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1553 }
1554 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1555 term.line[y][x-1].c[0] = ' ';
1556 term.line[y][x-1].mode &= ~ATTR_WIDE;
1557 }
1558
1559 term.dirty[y] = 1;
1560 term.line[y][x] = *attr;
1561 memcpy(term.line[y][x].c, c, UTF_SIZ);
1562 }
1563
1564 void
1565 tclearregion(int x1, int y1, int x2, int y2) {
1566 int x, y, temp;
1567
1568 if(x1 > x2)
1569 temp = x1, x1 = x2, x2 = temp;
1570 if(y1 > y2)
1571 temp = y1, y1 = y2, y2 = temp;
1572
1573 LIMIT(x1, 0, term.col-1);
1574 LIMIT(x2, 0, term.col-1);
1575 LIMIT(y1, 0, term.row-1);
1576 LIMIT(y2, 0, term.row-1);
1577
1578 for(y = y1; y <= y2; y++) {
1579 term.dirty[y] = 1;
1580 for(x = x1; x <= x2; x++) {
1581 if(selected(x, y))
1582 selclear(NULL);
1583 term.line[y][x] = term.c.attr;
1584 memcpy(term.line[y][x].c, " ", 2);
1585 }
1586 }
1587 }
1588
1589 void
1590 tdeletechar(int n) {
1591 int dst, src, size;
1592 Glyph *line;
1593
1594 LIMIT(n, 0, term.col - term.c.x);
1595
1596 dst = term.c.x;
1597 src = term.c.x + n;
1598 size = term.col - src;
1599 line = term.line[term.c.y];
1600
1601 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1602 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1603 }
1604
1605 void
1606 tinsertblank(int n) {
1607 int dst, src, size;
1608 Glyph *line;
1609
1610 LIMIT(n, 0, term.col - term.c.x);
1611
1612 dst = term.c.x + n;
1613 src = term.c.x;
1614 size = term.col - dst;
1615 line = term.line[term.c.y];
1616
1617 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1618 tclearregion(src, term.c.y, dst - 1, term.c.y);
1619 }
1620
1621 void
1622 tinsertblankline(int n) {
1623 if(BETWEEN(term.c.y, term.top, term.bot))
1624 tscrolldown(term.c.y, n);
1625 }
1626
1627 void
1628 tdeleteline(int n) {
1629 if(BETWEEN(term.c.y, term.top, term.bot))
1630 tscrollup(term.c.y, n);
1631 }
1632
1633 int32_t
1634 tdefcolor(int *attr, int *npar, int l) {
1635 int32_t idx = -1;
1636 uint r, g, b;
1637
1638 switch (attr[*npar + 1]) {
1639 case 2: /* direct colour in RGB space */
1640 if (*npar + 4 >= l) {
1641 fprintf(stderr,
1642 "erresc(38): Incorrect number of parameters (%d)\n",
1643 *npar);
1644 break;
1645 }
1646 r = attr[*npar + 2];
1647 g = attr[*npar + 3];
1648 b = attr[*npar + 4];
1649 *npar += 4;
1650 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1651 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1652 r, g, b);
1653 else
1654 idx = TRUECOLOR(r, g, b);
1655 break;
1656 case 5: /* indexed colour */
1657 if (*npar + 2 >= l) {
1658 fprintf(stderr,
1659 "erresc(38): Incorrect number of parameters (%d)\n",
1660 *npar);
1661 break;
1662 }
1663 *npar += 2;
1664 if(!BETWEEN(attr[*npar], 0, 255))
1665 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1666 else
1667 idx = attr[*npar];
1668 break;
1669 case 0: /* implemented defined (only foreground) */
1670 case 1: /* transparent */
1671 case 3: /* direct colour in CMY space */
1672 case 4: /* direct colour in CMYK space */
1673 default:
1674 fprintf(stderr,
1675 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1676 }
1677
1678 return idx;
1679 }
1680
1681 void
1682 tsetattr(int *attr, int l) {
1683 int i;
1684 int32_t idx;
1685
1686 for(i = 0; i < l; i++) {
1687 switch(attr[i]) {
1688 case 0:
1689 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1690 | ATTR_BOLD | ATTR_ITALIC \
1691 | ATTR_BLINK);
1692 term.c.attr.fg = defaultfg;
1693 term.c.attr.bg = defaultbg;
1694 break;
1695 case 1:
1696 term.c.attr.mode |= ATTR_BOLD;
1697 break;
1698 case 3:
1699 term.c.attr.mode |= ATTR_ITALIC;
1700 break;
1701 case 4:
1702 term.c.attr.mode |= ATTR_UNDERLINE;
1703 break;
1704 case 5: /* slow blink */
1705 case 6: /* rapid blink */
1706 term.c.attr.mode |= ATTR_BLINK;
1707 break;
1708 case 7:
1709 term.c.attr.mode |= ATTR_REVERSE;
1710 break;
1711 case 21:
1712 case 22:
1713 term.c.attr.mode &= ~ATTR_BOLD;
1714 break;
1715 case 23:
1716 term.c.attr.mode &= ~ATTR_ITALIC;
1717 break;
1718 case 24:
1719 term.c.attr.mode &= ~ATTR_UNDERLINE;
1720 break;
1721 case 25:
1722 case 26:
1723 term.c.attr.mode &= ~ATTR_BLINK;
1724 break;
1725 case 27:
1726 term.c.attr.mode &= ~ATTR_REVERSE;
1727 break;
1728 case 38:
1729 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1730 term.c.attr.fg = idx;
1731 break;
1732 case 39:
1733 term.c.attr.fg = defaultfg;
1734 break;
1735 case 48:
1736 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1737 term.c.attr.bg = idx;
1738 break;
1739 case 49:
1740 term.c.attr.bg = defaultbg;
1741 break;
1742 default:
1743 if(BETWEEN(attr[i], 30, 37)) {
1744 term.c.attr.fg = attr[i] - 30;
1745 } else if(BETWEEN(attr[i], 40, 47)) {
1746 term.c.attr.bg = attr[i] - 40;
1747 } else if(BETWEEN(attr[i], 90, 97)) {
1748 term.c.attr.fg = attr[i] - 90 + 8;
1749 } else if(BETWEEN(attr[i], 100, 107)) {
1750 term.c.attr.bg = attr[i] - 100 + 8;
1751 } else {
1752 fprintf(stderr,
1753 "erresc(default): gfx attr %d unknown\n",
1754 attr[i]), csidump();
1755 }
1756 break;
1757 }
1758 }
1759 }
1760
1761 void
1762 tsetscroll(int t, int b) {
1763 int temp;
1764
1765 LIMIT(t, 0, term.row-1);
1766 LIMIT(b, 0, term.row-1);
1767 if(t > b) {
1768 temp = t;
1769 t = b;
1770 b = temp;
1771 }
1772 term.top = t;
1773 term.bot = b;
1774 }
1775
1776 void
1777 tsetmode(bool priv, bool set, int *args, int narg) {
1778 int *lim, mode;
1779 bool alt;
1780
1781 for(lim = args + narg; args < lim; ++args) {
1782 if(priv) {
1783 switch(*args) {
1784 case 1: /* DECCKM -- Cursor key */
1785 MODBIT(term.mode, set, MODE_APPCURSOR);
1786 break;
1787 case 5: /* DECSCNM -- Reverse video */
1788 mode = term.mode;
1789 MODBIT(term.mode, set, MODE_REVERSE);
1790 if(mode != term.mode)
1791 redraw(REDRAW_TIMEOUT);
1792 break;
1793 case 6: /* DECOM -- Origin */
1794 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1795 tmoveato(0, 0);
1796 break;
1797 case 7: /* DECAWM -- Auto wrap */
1798 MODBIT(term.mode, set, MODE_WRAP);
1799 break;
1800 case 0: /* Error (IGNORED) */
1801 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1802 case 3: /* DECCOLM -- Column (IGNORED) */
1803 case 4: /* DECSCLM -- Scroll (IGNORED) */
1804 case 8: /* DECARM -- Auto repeat (IGNORED) */
1805 case 18: /* DECPFF -- Printer feed (IGNORED) */
1806 case 19: /* DECPEX -- Printer extent (IGNORED) */
1807 case 42: /* DECNRCM -- National characters (IGNORED) */
1808 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1809 break;
1810 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1811 MODBIT(term.mode, !set, MODE_HIDE);
1812 break;
1813 case 9: /* X10 mouse compatibility mode */
1814 xsetpointermotion(0);
1815 MODBIT(term.mode, 0, MODE_MOUSE);
1816 MODBIT(term.mode, set, MODE_MOUSEX10);
1817 break;
1818 case 1000: /* 1000: report button press */
1819 xsetpointermotion(0);
1820 MODBIT(term.mode, 0, MODE_MOUSE);
1821 MODBIT(term.mode, set, MODE_MOUSEBTN);
1822 break;
1823 case 1002: /* 1002: report motion on button press */
1824 xsetpointermotion(0);
1825 MODBIT(term.mode, 0, MODE_MOUSE);
1826 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1827 break;
1828 case 1003: /* 1003: enable all mouse motions */
1829 xsetpointermotion(set);
1830 MODBIT(term.mode, 0, MODE_MOUSE);
1831 MODBIT(term.mode, set, MODE_MOUSEMANY);
1832 break;
1833 case 1004: /* 1004: send focus events to tty */
1834 MODBIT(term.mode, set, MODE_FOCUS);
1835 break;
1836 case 1006: /* 1006: extended reporting mode */
1837 MODBIT(term.mode, set, MODE_MOUSESGR);
1838 break;
1839 case 1034:
1840 MODBIT(term.mode, set, MODE_8BIT);
1841 break;
1842 case 1049: /* swap screen & set/restore cursor as xterm */
1843 if (!allowaltscreen)
1844 break;
1845 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1846 /* FALLTHRU */
1847 case 47: /* swap screen */
1848 case 1047:
1849 if (!allowaltscreen)
1850 break;
1851 alt = IS_SET(MODE_ALTSCREEN);
1852 if(alt) {
1853 tclearregion(0, 0, term.col-1,
1854 term.row-1);
1855 }
1856 if(set ^ alt) /* set is always 1 or 0 */
1857 tswapscreen();
1858 if(*args != 1049)
1859 break;
1860 /* FALLTRU */
1861 case 1048:
1862 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1863 break;
1864 case 2004: /* 2004: bracketed paste mode */
1865 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1866 break;
1867 /* Not implemented mouse modes. See comments there. */
1868 case 1001: /* mouse highlight mode; can hang the
1869 terminal by design when implemented. */
1870 case 1005: /* UTF-8 mouse mode; will confuse
1871 applications not supporting UTF-8
1872 and luit. */
1873 case 1015: /* urxvt mangled mouse mode; incompatible
1874 and can be mistaken for other control
1875 codes. */
1876 default:
1877 fprintf(stderr,
1878 "erresc: unknown private set/reset mode %d\n",
1879 *args);
1880 break;
1881 }
1882 } else {
1883 switch(*args) {
1884 case 0: /* Error (IGNORED) */
1885 break;
1886 case 2: /* KAM -- keyboard action */
1887 MODBIT(term.mode, set, MODE_KBDLOCK);
1888 break;
1889 case 4: /* IRM -- Insertion-replacement */
1890 MODBIT(term.mode, set, MODE_INSERT);
1891 break;
1892 case 12: /* SRM -- Send/Receive */
1893 MODBIT(term.mode, !set, MODE_ECHO);
1894 break;
1895 case 20: /* LNM -- Linefeed/new line */
1896 MODBIT(term.mode, set, MODE_CRLF);
1897 break;
1898 default:
1899 fprintf(stderr,
1900 "erresc: unknown set/reset mode %d\n",
1901 *args);
1902 break;
1903 }
1904 }
1905 }
1906 }
1907
1908 void
1909 csihandle(void) {
1910 char buf[40];
1911 int len;
1912
1913 switch(csiescseq.mode) {
1914 default:
1915 unknown:
1916 fprintf(stderr, "erresc: unknown csi ");
1917 csidump();
1918 /* die(""); */
1919 break;
1920 case '@': /* ICH -- Insert <n> blank char */
1921 DEFAULT(csiescseq.arg[0], 1);
1922 tinsertblank(csiescseq.arg[0]);
1923 break;
1924 case 'A': /* CUU -- Cursor <n> Up */
1925 DEFAULT(csiescseq.arg[0], 1);
1926 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1927 break;
1928 case 'B': /* CUD -- Cursor <n> Down */
1929 case 'e': /* VPR --Cursor <n> Down */
1930 DEFAULT(csiescseq.arg[0], 1);
1931 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1932 break;
1933 case 'i': /* MC -- Media Copy */
1934 switch(csiescseq.arg[0]) {
1935 case 0:
1936 tdump();
1937 break;
1938 case 1:
1939 tdumpline(term.c.y);
1940 break;
1941 case 2:
1942 tdumpsel();
1943 break;
1944 case 4:
1945 term.mode &= ~MODE_PRINT;
1946 break;
1947 case 5:
1948 term.mode |= MODE_PRINT;
1949 break;
1950 }
1951 break;
1952 case 'c': /* DA -- Device Attributes */
1953 if(csiescseq.arg[0] == 0)
1954 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1955 break;
1956 case 'C': /* CUF -- Cursor <n> Forward */
1957 case 'a': /* HPR -- Cursor <n> Forward */
1958 DEFAULT(csiescseq.arg[0], 1);
1959 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1960 break;
1961 case 'D': /* CUB -- Cursor <n> Backward */
1962 DEFAULT(csiescseq.arg[0], 1);
1963 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1964 break;
1965 case 'E': /* CNL -- Cursor <n> Down and first col */
1966 DEFAULT(csiescseq.arg[0], 1);
1967 tmoveto(0, term.c.y+csiescseq.arg[0]);
1968 break;
1969 case 'F': /* CPL -- Cursor <n> Up and first col */
1970 DEFAULT(csiescseq.arg[0], 1);
1971 tmoveto(0, term.c.y-csiescseq.arg[0]);
1972 break;
1973 case 'g': /* TBC -- Tabulation clear */
1974 switch(csiescseq.arg[0]) {
1975 case 0: /* clear current tab stop */
1976 term.tabs[term.c.x] = 0;
1977 break;
1978 case 3: /* clear all the tabs */
1979 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1980 break;
1981 default:
1982 goto unknown;
1983 }
1984 break;
1985 case 'G': /* CHA -- Move to <col> */
1986 case '`': /* HPA */
1987 DEFAULT(csiescseq.arg[0], 1);
1988 tmoveto(csiescseq.arg[0]-1, term.c.y);
1989 break;
1990 case 'H': /* CUP -- Move to <row> <col> */
1991 case 'f': /* HVP */
1992 DEFAULT(csiescseq.arg[0], 1);
1993 DEFAULT(csiescseq.arg[1], 1);
1994 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1995 break;
1996 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1997 DEFAULT(csiescseq.arg[0], 1);
1998 tputtab(csiescseq.arg[0]);
1999 break;
2000 case 'J': /* ED -- Clear screen */
2001 selclear(NULL);
2002 switch(csiescseq.arg[0]) {
2003 case 0: /* below */
2004 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2005 if(term.c.y < term.row-1) {
2006 tclearregion(0, term.c.y+1, term.col-1,
2007 term.row-1);
2008 }
2009 break;
2010 case 1: /* above */
2011 if(term.c.y > 1)
2012 tclearregion(0, 0, term.col-1, term.c.y-1);
2013 tclearregion(0, term.c.y, term.c.x, term.c.y);
2014 break;
2015 case 2: /* all */
2016 tclearregion(0, 0, term.col-1, term.row-1);
2017 break;
2018 default:
2019 goto unknown;
2020 }
2021 break;
2022 case 'K': /* EL -- Clear line */
2023 switch(csiescseq.arg[0]) {
2024 case 0: /* right */
2025 tclearregion(term.c.x, term.c.y, term.col-1,
2026 term.c.y);
2027 break;
2028 case 1: /* left */
2029 tclearregion(0, term.c.y, term.c.x, term.c.y);
2030 break;
2031 case 2: /* all */
2032 tclearregion(0, term.c.y, term.col-1, term.c.y);
2033 break;
2034 }
2035 break;
2036 case 'S': /* SU -- Scroll <n> line up */
2037 DEFAULT(csiescseq.arg[0], 1);
2038 tscrollup(term.top, csiescseq.arg[0]);
2039 break;
2040 case 'T': /* SD -- Scroll <n> line down */
2041 DEFAULT(csiescseq.arg[0], 1);
2042 tscrolldown(term.top, csiescseq.arg[0]);
2043 break;
2044 case 'L': /* IL -- Insert <n> blank lines */
2045 DEFAULT(csiescseq.arg[0], 1);
2046 tinsertblankline(csiescseq.arg[0]);
2047 break;
2048 case 'l': /* RM -- Reset Mode */
2049 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2050 break;
2051 case 'M': /* DL -- Delete <n> lines */
2052 DEFAULT(csiescseq.arg[0], 1);
2053 tdeleteline(csiescseq.arg[0]);
2054 break;
2055 case 'X': /* ECH -- Erase <n> char */
2056 DEFAULT(csiescseq.arg[0], 1);
2057 tclearregion(term.c.x, term.c.y,
2058 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2059 break;
2060 case 'P': /* DCH -- Delete <n> char */
2061 DEFAULT(csiescseq.arg[0], 1);
2062 tdeletechar(csiescseq.arg[0]);
2063 break;
2064 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2065 DEFAULT(csiescseq.arg[0], 1);
2066 tputtab(-csiescseq.arg[0]);
2067 break;
2068 case 'd': /* VPA -- Move to <row> */
2069 DEFAULT(csiescseq.arg[0], 1);
2070 tmoveato(term.c.x, csiescseq.arg[0]-1);
2071 break;
2072 case 'h': /* SM -- Set terminal mode */
2073 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2074 break;
2075 case 'm': /* SGR -- Terminal attribute (color) */
2076 tsetattr(csiescseq.arg, csiescseq.narg);
2077 break;
2078 case 'n': /* DSR – Device Status Report (cursor position) */
2079 if (csiescseq.arg[0] == 6) {
2080 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2081 term.c.y+1, term.c.x+1);
2082 ttywrite(buf, len);
2083 break;
2084 }
2085 case 'r': /* DECSTBM -- Set Scrolling Region */
2086 if(csiescseq.priv) {
2087 goto unknown;
2088 } else {
2089 DEFAULT(csiescseq.arg[0], 1);
2090 DEFAULT(csiescseq.arg[1], term.row);
2091 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2092 tmoveato(0, 0);
2093 }
2094 break;
2095 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2096 tcursor(CURSOR_SAVE);
2097 break;
2098 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2099 tcursor(CURSOR_LOAD);
2100 break;
2101 }
2102 }
2103
2104 void
2105 csidump(void) {
2106 int i;
2107 uint c;
2108
2109 printf("ESC[");
2110 for(i = 0; i < csiescseq.len; i++) {
2111 c = csiescseq.buf[i] & 0xff;
2112 if(isprint(c)) {
2113 putchar(c);
2114 } else if(c == '\n') {
2115 printf("(\\n)");
2116 } else if(c == '\r') {
2117 printf("(\\r)");
2118 } else if(c == 0x1b) {
2119 printf("(\\e)");
2120 } else {
2121 printf("(%02x)", c);
2122 }
2123 }
2124 putchar('\n');
2125 }
2126
2127 void
2128 csireset(void) {
2129 memset(&csiescseq, 0, sizeof(csiescseq));
2130 }
2131
2132 void
2133 strhandle(void) {
2134 char *p = NULL;
2135 int j, narg, par;
2136
2137 strparse();
2138 narg = strescseq.narg;
2139 par = atoi(strescseq.args[0]);
2140
2141 switch(strescseq.type) {
2142 case ']': /* OSC -- Operating System Command */
2143 switch(par) {
2144 case 0:
2145 case 1:
2146 case 2:
2147 if(narg > 1)
2148 xsettitle(strescseq.args[1]);
2149 return;
2150 case 4: /* color set */
2151 if(narg < 3)
2152 break;
2153 p = strescseq.args[2];
2154 /* fall through */
2155 case 104: /* color reset, here p = NULL */
2156 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2157 if (!xsetcolorname(j, p)) {
2158 fprintf(stderr, "erresc: invalid color %s\n", p);
2159 } else {
2160 /*
2161 * TODO if defaultbg color is changed, borders
2162 * are dirty
2163 */
2164 redraw(0);
2165 }
2166 return;
2167 }
2168 break;
2169 case 'k': /* old title set compatibility */
2170 xsettitle(strescseq.args[0]);
2171 return;
2172 case 'P': /* DCS -- Device Control String */
2173 case '_': /* APC -- Application Program Command */
2174 case '^': /* PM -- Privacy Message */
2175 return;
2176 }
2177
2178 fprintf(stderr, "erresc: unknown str ");
2179 strdump();
2180 }
2181
2182 void
2183 strparse(void) {
2184 char *p = strescseq.buf;
2185
2186 strescseq.narg = 0;
2187 strescseq.buf[strescseq.len] = '\0';
2188 while(p && strescseq.narg < STR_ARG_SIZ)
2189 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2190 }
2191
2192 void
2193 strdump(void) {
2194 int i;
2195 uint c;
2196
2197 printf("ESC%c", strescseq.type);
2198 for(i = 0; i < strescseq.len; i++) {
2199 c = strescseq.buf[i] & 0xff;
2200 if(c == '\0') {
2201 return;
2202 } else if(isprint(c)) {
2203 putchar(c);
2204 } else if(c == '\n') {
2205 printf("(\\n)");
2206 } else if(c == '\r') {
2207 printf("(\\r)");
2208 } else if(c == 0x1b) {
2209 printf("(\\e)");
2210 } else {
2211 printf("(%02x)", c);
2212 }
2213 }
2214 printf("ESC\\\n");
2215 }
2216
2217 void
2218 strreset(void) {
2219 memset(&strescseq, 0, sizeof(strescseq));
2220 }
2221
2222 void
2223 tprinter(char *s, size_t len) {
2224 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2225 fprintf(stderr, "Error writing in %s:%s\n",
2226 opt_io, strerror(errno));
2227 close(iofd);
2228 iofd = -1;
2229 }
2230 }
2231
2232 void
2233 toggleprinter(const Arg *arg) {
2234 term.mode ^= MODE_PRINT;
2235 }
2236
2237 void
2238 printscreen(const Arg *arg) {
2239 tdump();
2240 }
2241
2242 void
2243 printsel(const Arg *arg) {
2244 tdumpsel();
2245 }
2246
2247 void
2248 tdumpsel(void) {
2249 char *ptr;
2250
2251 if((ptr = getsel())) {
2252 tprinter(ptr, strlen(ptr));
2253 free(ptr);
2254 }
2255 }
2256
2257 void
2258 tdumpline(int n) {
2259 Glyph *bp, *end;
2260
2261 bp = &term.line[n][0];
2262 end = &bp[term.col-1];
2263 while(end > bp && !strcmp(" ", end->c))
2264 --end;
2265 if(bp != end || strcmp(bp->c, " ")) {
2266 for( ;bp <= end; ++bp)
2267 tprinter(bp->c, strlen(bp->c));
2268 }
2269 tprinter("\n", 1);
2270 }
2271
2272 void
2273 tdump(void) {
2274 int i;
2275
2276 for(i = 0; i < term.row; ++i)
2277 tdumpline(i);
2278 }
2279
2280 void
2281 tputtab(int n) {
2282 uint x = term.c.x;
2283
2284 if(n > 0) {
2285 while(x < term.col && n--)
2286 for(++x; x < term.col && !term.tabs[x]; ++x)
2287 /* nothing */ ;
2288 } else if(n < 0) {
2289 while(x > 0 && n++)
2290 for(--x; x > 0 && !term.tabs[x]; --x)
2291 /* nothing */ ;
2292 }
2293 tmoveto(x, term.c.y);
2294 }
2295
2296 void
2297 techo(char *buf, int len) {
2298 for(; len > 0; buf++, len--) {
2299 char c = *buf;
2300
2301 if(BETWEEN(c, 0x00, 0x1f) || c == 0x7f) { /* control code */
2302 if(c != '\n' && c != '\r' && c != '\t') {
2303 c ^= '\x40';
2304 tputc("^", 1);
2305 }
2306 tputc(&c, 1);
2307 } else {
2308 break;
2309 }
2310 }
2311 if(len)
2312 tputc(buf, len);
2313 }
2314
2315 void
2316 tdeftran(char ascii) {
2317 char c, (*bp)[2];
2318 static char tbl[][2] = {
2319 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2320 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2321 {'5', CS_FIN}, {'C', CS_FIN},
2322 {0, 0}
2323 };
2324
2325 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2326 /* nothing */;
2327
2328 if (c == 0)
2329 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2330 else
2331 term.trantbl[term.icharset] = (*bp)[1];
2332 }
2333
2334 void
2335 tselcs(void) {
2336 MODBIT(term.c.attr.mode,
2337 term.trantbl[term.charset] == CS_GRAPHIC0,
2338 ATTR_GFX);
2339 }
2340
2341 void
2342 tputc(char *c, int len) {
2343 uchar ascii = *c;
2344 bool control = ascii < '\x20' || ascii == 0177;
2345 long unicodep;
2346 int width;
2347
2348 if(len == 1) {
2349 width = 1;
2350 } else {
2351 utf8decode(c, &unicodep, UTF_SIZ);
2352 width = wcwidth(unicodep);
2353 }
2354
2355 if(IS_SET(MODE_PRINT))
2356 tprinter(c, len);
2357
2358 /*
2359 * STR sequences must be checked before anything else
2360 * because it can use some control codes as part of the sequence.
2361 */
2362 if(term.esc & ESC_STR) {
2363 switch(ascii) {
2364 case '\033':
2365 term.esc = ESC_START | ESC_STR_END;
2366 break;
2367 case '\a': /* backwards compatibility to xterm */
2368 term.esc = 0;
2369 strhandle();
2370 break;
2371 default:
2372 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2373 memmove(&strescseq.buf[strescseq.len], c, len);
2374 strescseq.len += len;
2375 } else {
2376 /*
2377 * Here is a bug in terminals. If the user never sends
2378 * some code to stop the str or esc command, then st
2379 * will stop responding. But this is better than
2380 * silently failing with unknown characters. At least
2381 * then users will report back.
2382 *
2383 * In the case users ever get fixed, here is the code:
2384 */
2385 /*
2386 * term.esc = 0;
2387 * strhandle();
2388 */
2389 }
2390 }
2391 return;
2392 }
2393
2394 /*
2395 * Actions of control codes must be performed as soon they arrive
2396 * because they can be embedded inside a control sequence, and
2397 * they must not cause conflicts with sequences.
2398 */
2399 if(control) {
2400 switch(ascii) {
2401 case '\t': /* HT */
2402 tputtab(1);
2403 return;
2404 case '\b': /* BS */
2405 tmoveto(term.c.x-1, term.c.y);
2406 return;
2407 case '\r': /* CR */
2408 tmoveto(0, term.c.y);
2409 return;
2410 case '\f': /* LF */
2411 case '\v': /* VT */
2412 case '\n': /* LF */
2413 /* go to first col if the mode is set */
2414 tnewline(IS_SET(MODE_CRLF));
2415 return;
2416 case '\a': /* BEL */
2417 if(!(xw.state & WIN_FOCUSED))
2418 xseturgency(1);
2419 if (bellvolume)
2420 XBell(xw.dpy, bellvolume);
2421 return;
2422 case '\033': /* ESC */
2423 csireset();
2424 term.esc = ESC_START;
2425 return;
2426 case '\016': /* SO */
2427 term.charset = 0;
2428 tselcs();
2429 return;
2430 case '\017': /* SI */
2431 term.charset = 1;
2432 tselcs();
2433 return;
2434 case '\032': /* SUB */
2435 case '\030': /* CAN */
2436 csireset();
2437 return;
2438 case '\005': /* ENQ (IGNORED) */
2439 case '\000': /* NUL (IGNORED) */
2440 case '\021': /* XON (IGNORED) */
2441 case '\023': /* XOFF (IGNORED) */
2442 case 0177: /* DEL (IGNORED) */
2443 return;
2444 }
2445 } else if(term.esc & ESC_START) {
2446 if(term.esc & ESC_CSI) {
2447 csiescseq.buf[csiescseq.len++] = ascii;
2448 if(BETWEEN(ascii, 0x40, 0x7E)
2449 || csiescseq.len >= \
2450 sizeof(csiescseq.buf)-1) {
2451 term.esc = 0;
2452 csiparse();
2453 csihandle();
2454 }
2455 } else if(term.esc & ESC_STR_END) {
2456 term.esc = 0;
2457 if(ascii == '\\')
2458 strhandle();
2459 } else if(term.esc & ESC_ALTCHARSET) {
2460 tdeftran(ascii);
2461 tselcs();
2462 term.esc = 0;
2463 } else if(term.esc & ESC_TEST) {
2464 if(ascii == '8') { /* DEC screen alignment test. */
2465 char E[UTF_SIZ] = "E";
2466 int x, y;
2467
2468 for(x = 0; x < term.col; ++x) {
2469 for(y = 0; y < term.row; ++y)
2470 tsetchar(E, &term.c.attr, x, y);
2471 }
2472 }
2473 term.esc = 0;
2474 } else {
2475 switch(ascii) {
2476 case '[':
2477 term.esc |= ESC_CSI;
2478 break;
2479 case '#':
2480 term.esc |= ESC_TEST;
2481 break;
2482 case 'P': /* DCS -- Device Control String */
2483 case '_': /* APC -- Application Program Command */
2484 case '^': /* PM -- Privacy Message */
2485 case ']': /* OSC -- Operating System Command */
2486 case 'k': /* old title set compatibility */
2487 strreset();
2488 strescseq.type = ascii;
2489 term.esc |= ESC_STR;
2490 break;
2491 case '(': /* set primary charset G0 */
2492 case ')': /* set secondary charset G1 */
2493 case '*': /* set tertiary charset G2 */
2494 case '+': /* set quaternary charset G3 */
2495 term.icharset = ascii - '(';
2496 term.esc |= ESC_ALTCHARSET;
2497 break;
2498 case 'D': /* IND -- Linefeed */
2499 if(term.c.y == term.bot) {
2500 tscrollup(term.top, 1);
2501 } else {
2502 tmoveto(term.c.x, term.c.y+1);
2503 }
2504 term.esc = 0;
2505 break;
2506 case 'E': /* NEL -- Next line */
2507 tnewline(1); /* always go to first col */
2508 term.esc = 0;
2509 break;
2510 case 'H': /* HTS -- Horizontal tab stop */
2511 term.tabs[term.c.x] = 1;
2512 term.esc = 0;
2513 break;
2514 case 'M': /* RI -- Reverse index */
2515 if(term.c.y == term.top) {
2516 tscrolldown(term.top, 1);
2517 } else {
2518 tmoveto(term.c.x, term.c.y-1);
2519 }
2520 term.esc = 0;
2521 break;
2522 case 'Z': /* DECID -- Identify Terminal */
2523 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2524 term.esc = 0;
2525 break;
2526 case 'c': /* RIS -- Reset to inital state */
2527 treset();
2528 term.esc = 0;
2529 xresettitle();
2530 xloadcols();
2531 break;
2532 case '=': /* DECPAM -- Application keypad */
2533 term.mode |= MODE_APPKEYPAD;
2534 term.esc = 0;
2535 break;
2536 case '>': /* DECPNM -- Normal keypad */
2537 term.mode &= ~MODE_APPKEYPAD;
2538 term.esc = 0;
2539 break;
2540 case '7': /* DECSC -- Save Cursor */
2541 tcursor(CURSOR_SAVE);
2542 term.esc = 0;
2543 break;
2544 case '8': /* DECRC -- Restore Cursor */
2545 tcursor(CURSOR_LOAD);
2546 term.esc = 0;
2547 break;
2548 case '\\': /* ST -- Stop */
2549 term.esc = 0;
2550 break;
2551 default:
2552 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2553 (uchar) ascii, isprint(ascii)? ascii:'.');
2554 term.esc = 0;
2555 }
2556 }
2557 /*
2558 * All characters which form part of a sequence are not
2559 * printed
2560 */
2561 return;
2562 }
2563 /*
2564 * Display control codes only if we are in graphic mode
2565 */
2566 if(control && !(term.c.attr.mode & ATTR_GFX))
2567 return;
2568 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2569 selclear(NULL);
2570 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2571 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2572 tnewline(1);
2573 }
2574
2575 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2576 memmove(&term.line[term.c.y][term.c.x+1],
2577 &term.line[term.c.y][term.c.x],
2578 (term.col - term.c.x - 1) * sizeof(Glyph));
2579 }
2580
2581 if(term.c.x+width > term.col)
2582 tnewline(1);
2583
2584 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2585
2586 if(width == 2) {
2587 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2588 if(term.c.x+1 < term.col) {
2589 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2590 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2591 }
2592 }
2593 if(term.c.x+width < term.col) {
2594 tmoveto(term.c.x+width, term.c.y);
2595 } else {
2596 term.c.state |= CURSOR_WRAPNEXT;
2597 }
2598 }
2599
2600 int
2601 tresize(int col, int row) {
2602 int i;
2603 int minrow = MIN(row, term.row);
2604 int mincol = MIN(col, term.col);
2605 int slide = term.c.y - row + 1;
2606 bool *bp;
2607 Line *orig;
2608
2609 if(col < 1 || row < 1)
2610 return 0;
2611
2612 /* free unneeded rows */
2613 i = 0;
2614 if(slide > 0) {
2615 /*
2616 * slide screen to keep cursor where we expect it -
2617 * tscrollup would work here, but we can optimize to
2618 * memmove because we're freeing the earlier lines
2619 */
2620 for(/* i = 0 */; i < slide; i++) {
2621 free(term.line[i]);
2622 free(term.alt[i]);
2623 }
2624 memmove(term.line, term.line + slide, row * sizeof(Line));
2625 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2626 }
2627 for(i += row; i < term.row; i++) {
2628 free(term.line[i]);
2629 free(term.alt[i]);
2630 }
2631
2632 /* resize to new height */
2633 term.line = xrealloc(term.line, row * sizeof(Line));
2634 term.alt = xrealloc(term.alt, row * sizeof(Line));
2635 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2636 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2637
2638 /* resize each row to new width, zero-pad if needed */
2639 for(i = 0; i < minrow; i++) {
2640 term.dirty[i] = 1;
2641 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2642 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2643 }
2644
2645 /* allocate any new rows */
2646 for(/* i == minrow */; i < row; i++) {
2647 term.dirty[i] = 1;
2648 term.line[i] = xmalloc(col * sizeof(Glyph));
2649 term.alt[i] = xmalloc(col * sizeof(Glyph));
2650 }
2651 if(col > term.col) {
2652 bp = term.tabs + term.col;
2653
2654 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2655 while(--bp > term.tabs && !*bp)
2656 /* nothing */ ;
2657 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2658 *bp = 1;
2659 }
2660 /* update terminal size */
2661 term.col = col;
2662 term.row = row;
2663 /* reset scrolling region */
2664 tsetscroll(0, row-1);
2665 /* make use of the LIMIT in tmoveto */
2666 tmoveto(term.c.x, term.c.y);
2667 /* Clearing both screens */
2668 orig = term.line;
2669 do {
2670 if(mincol < col && 0 < minrow) {
2671 tclearregion(mincol, 0, col - 1, minrow - 1);
2672 }
2673 if(0 < col && minrow < row) {
2674 tclearregion(0, minrow, col - 1, row - 1);
2675 }
2676 tcursor(CURSOR_SAVE);
2677 tswapscreen();
2678 tcursor(CURSOR_LOAD);
2679 } while(orig != term.line);
2680
2681 return (slide > 0);
2682 }
2683
2684 void
2685 xresize(int col, int row) {
2686 xw.tw = MAX(1, col * xw.cw);
2687 xw.th = MAX(1, row * xw.ch);
2688
2689 XFreePixmap(xw.dpy, xw.buf);
2690 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2691 DefaultDepth(xw.dpy, xw.scr));
2692 XftDrawChange(xw.draw, xw.buf);
2693 xclear(0, 0, xw.w, xw.h);
2694 }
2695
2696 static inline ushort
2697 sixd_to_16bit(int x) {
2698 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2699 }
2700
2701 void
2702 xloadcols(void) {
2703 int i, r, g, b;
2704 XRenderColor color = { .alpha = 0xffff };
2705 static bool loaded;
2706 Colour *cp;
2707
2708 if(loaded) {
2709 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2710 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2711 }
2712
2713 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2714 for(i = 0; i < LEN(colorname); i++) {
2715 if(!colorname[i])
2716 continue;
2717 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2718 die("Could not allocate color '%s'\n", colorname[i]);
2719 }
2720 }
2721
2722 /* load colors [16-255] ; same colors as xterm */
2723 for(i = 16, r = 0; r < 6; r++) {
2724 for(g = 0; g < 6; g++) {
2725 for(b = 0; b < 6; b++) {
2726 color.red = sixd_to_16bit(r);
2727 color.green = sixd_to_16bit(g);
2728 color.blue = sixd_to_16bit(b);
2729 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2730 die("Could not allocate color %d\n", i);
2731 }
2732 i++;
2733 }
2734 }
2735 }
2736
2737 for(r = 0; r < 24; r++, i++) {
2738 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2739 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2740 &dc.col[i])) {
2741 die("Could not allocate color %d\n", i);
2742 }
2743 }
2744 loaded = true;
2745 }
2746
2747 int
2748 xsetcolorname(int x, const char *name) {
2749 XRenderColor color = { .alpha = 0xffff };
2750 Colour colour;
2751 if(!BETWEEN(x, 0, LEN(colorname)))
2752 return -1;
2753 if(!name) {
2754 if(BETWEEN(x, 16, 16 + 215)) {
2755 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2756 color.red = sixd_to_16bit(r);
2757 color.green = sixd_to_16bit(g);
2758 color.blue = sixd_to_16bit(b);
2759 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2760 return 0; /* something went wrong */
2761 dc.col[x] = colour;
2762 return 1;
2763 } else if(BETWEEN(x, 16 + 216, 255)) {
2764 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2765 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2766 return 0; /* something went wrong */
2767 dc.col[x] = colour;
2768 return 1;
2769 } else {
2770 name = colorname[x];
2771 }
2772 }
2773 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2774 return 0;
2775 dc.col[x] = colour;
2776 return 1;
2777 }
2778
2779 void
2780 xtermclear(int col1, int row1, int col2, int row2) {
2781 XftDrawRect(xw.draw,
2782 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2783 borderpx + col1 * xw.cw,
2784 borderpx + row1 * xw.ch,
2785 (col2-col1+1) * xw.cw,
2786 (row2-row1+1) * xw.ch);
2787 }
2788
2789 /*
2790 * Absolute coordinates.
2791 */
2792 void
2793 xclear(int x1, int y1, int x2, int y2) {
2794 XftDrawRect(xw.draw,
2795 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2796 x1, y1, x2-x1, y2-y1);
2797 }
2798
2799 void
2800 xhints(void) {
2801 XClassHint class = {opt_class ? opt_class : termname, termname};
2802 XWMHints wm = {.flags = InputHint, .input = 1};
2803 XSizeHints *sizeh = NULL;
2804
2805 sizeh = XAllocSizeHints();
2806
2807 sizeh->flags = PSize | PResizeInc | PBaseSize;
2808 sizeh->height = xw.h;
2809 sizeh->width = xw.w;
2810 sizeh->height_inc = xw.ch;
2811 sizeh->width_inc = xw.cw;
2812 sizeh->base_height = 2 * borderpx;
2813 sizeh->base_width = 2 * borderpx;
2814 if(xw.isfixed == True) {
2815 sizeh->flags |= PMaxSize | PMinSize;
2816 sizeh->min_width = sizeh->max_width = xw.w;
2817 sizeh->min_height = sizeh->max_height = xw.h;
2818 }
2819 if(xw.gm & (XValue|YValue)) {
2820 sizeh->flags |= USPosition | PWinGravity;
2821 sizeh->x = xw.l;
2822 sizeh->y = xw.t;
2823 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2824 }
2825
2826 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2827 &class);
2828 XFree(sizeh);
2829 }
2830
2831 int
2832 xgeommasktogravity(int mask) {
2833 switch(mask & (XNegative|YNegative)) {
2834 case 0:
2835 return NorthWestGravity;
2836 case XNegative:
2837 return NorthEastGravity;
2838 case YNegative:
2839 return SouthWestGravity;
2840 }
2841 return SouthEastGravity;
2842 }
2843
2844 int
2845 xloadfont(Font *f, FcPattern *pattern) {
2846 FcPattern *match;
2847 FcResult result;
2848
2849 match = FcFontMatch(NULL, pattern, &result);
2850 if(!match)
2851 return 1;
2852
2853 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2854 FcPatternDestroy(match);
2855 return 1;
2856 }
2857
2858 f->set = NULL;
2859 f->pattern = FcPatternDuplicate(pattern);
2860
2861 f->ascent = f->match->ascent;
2862 f->descent = f->match->descent;
2863 f->lbearing = 0;
2864 f->rbearing = f->match->max_advance_width;
2865
2866 f->height = f->ascent + f->descent;
2867 f->width = f->lbearing + f->rbearing;
2868
2869 return 0;
2870 }
2871
2872 void
2873 xloadfonts(char *fontstr, double fontsize) {
2874 FcPattern *pattern;
2875 FcResult r_sz, r_psz;
2876 double fontval;
2877
2878 if(fontstr[0] == '-') {
2879 pattern = XftXlfdParse(fontstr, False, False);
2880 } else {
2881 pattern = FcNameParse((FcChar8 *)fontstr);
2882 }
2883
2884 if(!pattern)
2885 die("st: can't open font %s\n", fontstr);
2886
2887 if(fontsize > 0) {
2888 FcPatternDel(pattern, FC_PIXEL_SIZE);
2889 FcPatternDel(pattern, FC_SIZE);
2890 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2891 usedfontsize = fontsize;
2892 } else {
2893 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2894 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2895 if(r_psz == FcResultMatch) {
2896 usedfontsize = fontval;
2897 } else if(r_sz == FcResultMatch) {
2898 usedfontsize = -1;
2899 } else {
2900 /*
2901 * Default font size is 12, if none given. This is to
2902 * have a known usedfontsize value.
2903 */
2904 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2905 usedfontsize = 12;
2906 }
2907 }
2908
2909 FcConfigSubstitute(0, pattern, FcMatchPattern);
2910 FcDefaultSubstitute(pattern);
2911
2912 if(xloadfont(&dc.font, pattern))
2913 die("st: can't open font %s\n", fontstr);
2914
2915 if(usedfontsize < 0) {
2916 FcPatternGetDouble(dc.font.match->pattern,
2917 FC_PIXEL_SIZE, 0, &fontval);
2918 usedfontsize = fontval;
2919 }
2920
2921 /* Setting character width and height. */
2922 xw.cw = CEIL(dc.font.width * cwscale);
2923 xw.ch = CEIL(dc.font.height * chscale);
2924
2925 FcPatternDel(pattern, FC_SLANT);
2926 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2927 if(xloadfont(&dc.ifont, pattern))
2928 die("st: can't open font %s\n", fontstr);
2929
2930 FcPatternDel(pattern, FC_WEIGHT);
2931 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2932 if(xloadfont(&dc.ibfont, pattern))
2933 die("st: can't open font %s\n", fontstr);
2934
2935 FcPatternDel(pattern, FC_SLANT);
2936 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2937 if(xloadfont(&dc.bfont, pattern))
2938 die("st: can't open font %s\n", fontstr);
2939
2940 FcPatternDestroy(pattern);
2941 }
2942
2943 int
2944 xloadfontset(Font *f) {
2945 FcResult result;
2946
2947 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2948 return 1;
2949 return 0;
2950 }
2951
2952 void
2953 xunloadfont(Font *f) {
2954 XftFontClose(xw.dpy, f->match);
2955 FcPatternDestroy(f->pattern);
2956 if(f->set)
2957 FcFontSetDestroy(f->set);
2958 }
2959
2960 void
2961 xunloadfonts(void) {
2962 int i;
2963
2964 /* Free the loaded fonts in the font cache. */
2965 for(i = 0; i < frclen; i++) {
2966 XftFontClose(xw.dpy, frc[i].font);
2967 }
2968 frclen = 0;
2969
2970 xunloadfont(&dc.font);
2971 xunloadfont(&dc.bfont);
2972 xunloadfont(&dc.ifont);
2973 xunloadfont(&dc.ibfont);
2974 }
2975
2976 void
2977 xzoom(const Arg *arg) {
2978 xunloadfonts();
2979 xloadfonts(usedfont, usedfontsize + arg->i);
2980 cresize(0, 0);
2981 redraw(0);
2982 }
2983
2984 void
2985 xinit(void) {
2986 XGCValues gcvalues;
2987 Cursor cursor;
2988 Window parent;
2989 pid_t thispid = getpid();
2990
2991 if(!(xw.dpy = XOpenDisplay(NULL)))
2992 die("Can't open display\n");
2993 xw.scr = XDefaultScreen(xw.dpy);
2994 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2995
2996 /* font */
2997 if(!FcInit())
2998 die("Could not init fontconfig.\n");
2999
3000 usedfont = (opt_font == NULL)? font : opt_font;
3001 xloadfonts(usedfont, 0);
3002
3003 /* colors */
3004 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3005 xloadcols();
3006
3007 /* adjust fixed window geometry */
3008 xw.w = 2 * borderpx + term.col * xw.cw;
3009 xw.h = 2 * borderpx + term.row * xw.ch;
3010 if(xw.gm & XNegative)
3011 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3012 if(xw.gm & YNegative)
3013 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3014
3015 /* Events */
3016 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3017 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3018 xw.attrs.bit_gravity = NorthWestGravity;
3019 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3020 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3021 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3022 xw.attrs.colormap = xw.cmap;
3023
3024 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3025 XRootWindow(xw.dpy, xw.scr);
3026 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3027 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3028 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3029 | CWEventMask | CWColormap, &xw.attrs);
3030
3031 memset(&gcvalues, 0, sizeof(gcvalues));
3032 gcvalues.graphics_exposures = False;
3033 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3034 &gcvalues);
3035 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3036 DefaultDepth(xw.dpy, xw.scr));
3037 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3038 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3039
3040 /* Xft rendering context */
3041 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3042
3043 /* input methods */
3044 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3045 XSetLocaleModifiers("@im=local");
3046 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3047 XSetLocaleModifiers("@im=");
3048 if((xw.xim = XOpenIM(xw.dpy,
3049 NULL, NULL, NULL)) == NULL) {
3050 die("XOpenIM failed. Could not open input"
3051 " device.\n");
3052 }
3053 }
3054 }
3055 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3056 | XIMStatusNothing, XNClientWindow, xw.win,
3057 XNFocusWindow, xw.win, NULL);
3058 if(xw.xic == NULL)
3059 die("XCreateIC failed. Could not obtain input method.\n");
3060
3061 /* white cursor, black outline */
3062 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3063 XDefineCursor(xw.dpy, xw.win, cursor);
3064 XRecolorCursor(xw.dpy, cursor,
3065 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3066 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3067
3068 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3069 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3070 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3071 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3072
3073 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3074 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3075 PropModeReplace, (uchar *)&thispid, 1);
3076
3077 xresettitle();
3078 XMapWindow(xw.dpy, xw.win);
3079 xhints();
3080 XSync(xw.dpy, False);
3081 }
3082
3083 void
3084 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3085 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3086 width = charlen * xw.cw, xp, i;
3087 int frcflags;
3088 int u8fl, u8fblen, u8cblen, doesexist;
3089 char *u8c, *u8fs;
3090 long unicodep;
3091 Font *font = &dc.font;
3092 FcResult fcres;
3093 FcPattern *fcpattern, *fontpattern;
3094 FcFontSet *fcsets[] = { NULL };
3095 FcCharSet *fccharset;
3096 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3097 XRenderColor colfg, colbg;
3098 XRectangle r;
3099 int oneatatime;
3100
3101 frcflags = FRC_NORMAL;
3102
3103 if(base.mode & ATTR_ITALIC) {
3104 if(base.fg == defaultfg)
3105 base.fg = defaultitalic;
3106 font = &dc.ifont;
3107 frcflags = FRC_ITALIC;
3108 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3109 if(base.fg == defaultfg)
3110 base.fg = defaultitalic;
3111 font = &dc.ibfont;
3112 frcflags = FRC_ITALICBOLD;
3113 } else if(base.mode & ATTR_UNDERLINE) {
3114 if(base.fg == defaultfg)
3115 base.fg = defaultunderline;
3116 }
3117
3118 if(IS_TRUECOL(base.fg)) {
3119 colfg.alpha = 0xffff;
3120 colfg.red = TRUERED(base.fg);
3121 colfg.green = TRUEGREEN(base.fg);
3122 colfg.blue = TRUEBLUE(base.fg);
3123 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3124 fg = &truefg;
3125 } else {
3126 fg = &dc.col[base.fg];
3127 }
3128
3129 if(IS_TRUECOL(base.bg)) {
3130 colbg.alpha = 0xffff;
3131 colbg.green = TRUEGREEN(base.bg);
3132 colbg.red = TRUERED(base.bg);
3133 colbg.blue = TRUEBLUE(base.bg);
3134 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3135 bg = &truebg;
3136 } else {
3137 bg = &dc.col[base.bg];
3138 }
3139
3140 if(base.mode & ATTR_BOLD) {
3141 if(BETWEEN(base.fg, 0, 7)) {
3142 /* basic system colors */
3143 fg = &dc.col[base.fg + 8];
3144 } else if(BETWEEN(base.fg, 16, 195)) {
3145 /* 256 colors */
3146 fg = &dc.col[base.fg + 36];
3147 } else if(BETWEEN(base.fg, 232, 251)) {
3148 /* greyscale */
3149 fg = &dc.col[base.fg + 4];
3150 }
3151 /*
3152 * Those ranges will not be brightened:
3153 * 8 - 15 – bright system colors
3154 * 196 - 231 – highest 256 color cube
3155 * 252 - 255 – brightest colors in greyscale
3156 */
3157 font = &dc.bfont;
3158 frcflags = FRC_BOLD;
3159 }
3160
3161 if(IS_SET(MODE_REVERSE)) {
3162 if(fg == &dc.col[defaultfg]) {
3163 fg = &dc.col[defaultbg];
3164 } else {
3165 colfg.red = ~fg->color.red;
3166 colfg.green = ~fg->color.green;
3167 colfg.blue = ~fg->color.blue;
3168 colfg.alpha = fg->color.alpha;
3169 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3170 &revfg);
3171 fg = &revfg;
3172 }
3173
3174 if(bg == &dc.col[defaultbg]) {
3175 bg = &dc.col[defaultfg];
3176 } else {
3177 colbg.red = ~bg->color.red;
3178 colbg.green = ~bg->color.green;
3179 colbg.blue = ~bg->color.blue;
3180 colbg.alpha = bg->color.alpha;
3181 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3182 &revbg);
3183 bg = &revbg;
3184 }
3185 }
3186
3187 if(base.mode & ATTR_REVERSE) {
3188 temp = fg;
3189 fg = bg;
3190 bg = temp;
3191 }
3192
3193 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3194 fg = bg;
3195
3196 /* Intelligent cleaning up of the borders. */
3197 if(x == 0) {
3198 xclear(0, (y == 0)? 0 : winy, borderpx,
3199 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3200 }
3201 if(x + charlen >= term.col) {
3202 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3203 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3204 }
3205 if(y == 0)
3206 xclear(winx, 0, winx + width, borderpx);
3207 if(y == term.row-1)
3208 xclear(winx, winy + xw.ch, winx + width, xw.h);
3209
3210 /* Clean up the region we want to draw to. */
3211 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3212
3213 /* Set the clip region because Xft is sometimes dirty. */
3214 r.x = 0;
3215 r.y = 0;
3216 r.height = xw.ch;
3217 r.width = width;
3218 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3219
3220 for(xp = winx; bytelen > 0;) {
3221 /*
3222 * Search for the range in the to be printed string of glyphs
3223 * that are in the main font. Then print that range. If
3224 * some glyph is found that is not in the font, do the
3225 * fallback dance.
3226 */
3227 u8fs = s;
3228 u8fblen = 0;
3229 u8fl = 0;
3230 oneatatime = font->width != xw.cw;
3231 for(;;) {
3232 u8c = s;
3233 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3234 s += u8cblen;
3235 bytelen -= u8cblen;
3236
3237 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3238 if(oneatatime || !doesexist || bytelen <= 0) {
3239 if(oneatatime || bytelen <= 0) {
3240 if(doesexist) {
3241 u8fl++;
3242 u8fblen += u8cblen;
3243 }
3244 }
3245
3246 if(u8fl > 0) {
3247 XftDrawStringUtf8(xw.draw, fg,
3248 font->match, xp,
3249 winy + font->ascent,
3250 (FcChar8 *)u8fs,
3251 u8fblen);
3252 xp += xw.cw * u8fl;
3253
3254 }
3255 break;
3256 }
3257
3258 u8fl++;
3259 u8fblen += u8cblen;
3260 }
3261 if(doesexist) {
3262 if(oneatatime)
3263 continue;
3264 break;
3265 }
3266
3267 /* Search the font cache. */
3268 for(i = 0; i < frclen; i++) {
3269 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3270 && frc[i].flags == frcflags) {
3271 break;
3272 }
3273 }
3274
3275 /* Nothing was found. */
3276 if(i >= frclen) {
3277 if(!font->set)
3278 xloadfontset(font);
3279 fcsets[0] = font->set;
3280
3281 /*
3282 * Nothing was found in the cache. Now use
3283 * some dozen of Fontconfig calls to get the
3284 * font for one single character.
3285 *
3286 * Xft and fontconfig are design failures.
3287 */
3288 fcpattern = FcPatternDuplicate(font->pattern);
3289 fccharset = FcCharSetCreate();
3290
3291 FcCharSetAddChar(fccharset, unicodep);
3292 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3293 fccharset);
3294 FcPatternAddBool(fcpattern, FC_SCALABLE,
3295 FcTrue);
3296
3297 FcConfigSubstitute(0, fcpattern,
3298 FcMatchPattern);
3299 FcDefaultSubstitute(fcpattern);
3300
3301 fontpattern = FcFontSetMatch(0, fcsets,
3302 FcTrue, fcpattern, &fcres);
3303
3304 /*
3305 * Overwrite or create the new cache entry.
3306 */
3307 if(frclen >= LEN(frc)) {
3308 frclen = LEN(frc) - 1;
3309 XftFontClose(xw.dpy, frc[frclen].font);
3310 }
3311
3312 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3313 fontpattern);
3314 frc[frclen].flags = frcflags;
3315
3316 i = frclen;
3317 frclen++;
3318
3319 FcPatternDestroy(fcpattern);
3320 FcCharSetDestroy(fccharset);
3321 }
3322
3323 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3324 xp, winy + frc[i].font->ascent,
3325 (FcChar8 *)u8c, u8cblen);
3326
3327 xp += xw.cw * wcwidth(unicodep);
3328 }
3329
3330 /*
3331 * This is how the loop above actually should be. Why does the
3332 * application have to care about font details?
3333 *
3334 * I have to repeat: Xft and Fontconfig are design failures.
3335 */
3336 /*
3337 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3338 winy + font->ascent, (FcChar8 *)s, bytelen);
3339 */
3340
3341 if(base.mode & ATTR_UNDERLINE) {
3342 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3343 width, 1);
3344 }
3345
3346 /* Reset clip to none. */
3347 XftDrawSetClip(xw.draw, 0);
3348 }
3349
3350 void
3351 xdrawcursor(void) {
3352 static int oldx = 0, oldy = 0;
3353 int sl, width, curx;
3354 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3355
3356 LIMIT(oldx, 0, term.col-1);
3357 LIMIT(oldy, 0, term.row-1);
3358
3359 curx = term.c.x;
3360
3361 /* adjust position if in dummy */
3362 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3363 oldx--;
3364 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3365 curx--;
3366
3367 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3368
3369 /* remove the old cursor */
3370 sl = utf8len(term.line[oldy][oldx].c);
3371 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3372 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3373 oldy, width, sl);
3374
3375 /* draw the new one */
3376 if(!(IS_SET(MODE_HIDE))) {
3377 if(xw.state & WIN_FOCUSED) {
3378 if(IS_SET(MODE_REVERSE)) {
3379 g.mode |= ATTR_REVERSE;
3380 g.fg = defaultcs;
3381 g.bg = defaultfg;
3382 }
3383
3384 sl = utf8len(g.c);
3385 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3386 ? 2 : 1;
3387 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3388 } else {
3389 XftDrawRect(xw.draw, &dc.col[defaultcs],
3390 borderpx + curx * xw.cw,
3391 borderpx + term.c.y * xw.ch,
3392 xw.cw - 1, 1);
3393 XftDrawRect(xw.draw, &dc.col[defaultcs],
3394 borderpx + curx * xw.cw,
3395 borderpx + term.c.y * xw.ch,
3396 1, xw.ch - 1);
3397 XftDrawRect(xw.draw, &dc.col[defaultcs],
3398 borderpx + (curx + 1) * xw.cw - 1,
3399 borderpx + term.c.y * xw.ch,
3400 1, xw.ch - 1);
3401 XftDrawRect(xw.draw, &dc.col[defaultcs],
3402 borderpx + curx * xw.cw,
3403 borderpx + (term.c.y + 1) * xw.ch - 1,
3404 xw.cw, 1);
3405 }
3406 oldx = curx, oldy = term.c.y;
3407 }
3408 }
3409
3410
3411 void
3412 xsettitle(char *p) {
3413 XTextProperty prop;
3414
3415 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3416 &prop);
3417 XSetWMName(xw.dpy, xw.win, &prop);
3418 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3419 XFree(prop.value);
3420 }
3421
3422 void
3423 xresettitle(void) {
3424 xsettitle(opt_title ? opt_title : "st");
3425 }
3426
3427 void
3428 redraw(int timeout) {
3429 struct timespec tv = {0, timeout * 1000};
3430
3431 draw();
3432
3433 if(timeout > 0) {
3434 nanosleep(&tv, NULL);
3435 XSync(xw.dpy, False); /* necessary for a good tput flash */
3436 }
3437 }
3438
3439 void
3440 draw(void) {
3441 drawregion(0, 0, term.col, term.row);
3442 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3443 xw.h, 0, 0);
3444 XSetForeground(xw.dpy, dc.gc,
3445 dc.col[IS_SET(MODE_REVERSE)?
3446 defaultfg : defaultbg].pixel);
3447 }
3448
3449 void
3450 drawregion(int x1, int y1, int x2, int y2) {
3451 int ic, ib, x, y, ox, sl;
3452 Glyph base, new;
3453 char buf[DRAW_BUF_SIZ];
3454 bool ena_sel = sel.ob.x != -1;
3455 long unicodep;
3456
3457 if(sel.alt != IS_SET(MODE_ALTSCREEN))
3458 ena_sel = 0;
3459
3460 if(!(xw.state & WIN_VISIBLE))
3461 return;
3462
3463 for(y = y1; y < y2; y++) {
3464 if(!term.dirty[y])
3465 continue;
3466
3467 xtermclear(0, y, term.col, y);
3468 term.dirty[y] = 0;
3469 base = term.line[y][0];
3470 ic = ib = ox = 0;
3471 for(x = x1; x < x2; x++) {
3472 new = term.line[y][x];
3473 if(new.mode == ATTR_WDUMMY)
3474 continue;
3475 if(ena_sel && selected(x, y))
3476 new.mode ^= ATTR_REVERSE;
3477 if(ib > 0 && (ATTRCMP(base, new)
3478 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3479 xdraws(buf, base, ox, y, ic, ib);
3480 ic = ib = 0;
3481 }
3482 if(ib == 0) {
3483 ox = x;
3484 base = new;
3485 }
3486
3487 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3488 memcpy(buf+ib, new.c, sl);
3489 ib += sl;
3490 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3491 }
3492 if(ib > 0)
3493 xdraws(buf, base, ox, y, ic, ib);
3494 }
3495 xdrawcursor();
3496 }
3497
3498 void
3499 expose(XEvent *ev) {
3500 XExposeEvent *e = &ev->xexpose;
3501
3502 if(xw.state & WIN_REDRAW) {
3503 if(!e->count)
3504 xw.state &= ~WIN_REDRAW;
3505 }
3506 redraw(0);
3507 }
3508
3509 void
3510 visibility(XEvent *ev) {
3511 XVisibilityEvent *e = &ev->xvisibility;
3512
3513 if(e->state == VisibilityFullyObscured) {
3514 xw.state &= ~WIN_VISIBLE;
3515 } else if(!(xw.state & WIN_VISIBLE)) {
3516 /* need a full redraw for next Expose, not just a buf copy */
3517 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3518 }
3519 }
3520
3521 void
3522 unmap(XEvent *ev) {
3523 xw.state &= ~WIN_VISIBLE;
3524 }
3525
3526 void
3527 xsetpointermotion(int set) {
3528 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3529 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3530 }
3531
3532 void
3533 xseturgency(int add) {
3534 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3535
3536 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3537 XSetWMHints(xw.dpy, xw.win, h);
3538 XFree(h);
3539 }
3540
3541 void
3542 focus(XEvent *ev) {
3543 XFocusChangeEvent *e = &ev->xfocus;
3544
3545 if(e->mode == NotifyGrab)
3546 return;
3547
3548 if(ev->type == FocusIn) {
3549 XSetICFocus(xw.xic);
3550 xw.state |= WIN_FOCUSED;
3551 xseturgency(0);
3552 if(IS_SET(MODE_FOCUS))
3553 ttywrite("\033[I", 3);
3554 } else {
3555 XUnsetICFocus(xw.xic);
3556 xw.state &= ~WIN_FOCUSED;
3557 if(IS_SET(MODE_FOCUS))
3558 ttywrite("\033[O", 3);
3559 }
3560 }
3561
3562 static inline bool
3563 match(uint mask, uint state) {
3564 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3565 }
3566
3567 void
3568 numlock(const Arg *dummy) {
3569 term.numlock ^= 1;
3570 }
3571
3572 char*
3573 kmap(KeySym k, uint state) {
3574 Key *kp;
3575 int i;
3576
3577 /* Check for mapped keys out of X11 function keys. */
3578 for(i = 0; i < LEN(mappedkeys); i++) {
3579 if(mappedkeys[i] == k)
3580 break;
3581 }
3582 if(i == LEN(mappedkeys)) {
3583 if((k & 0xFFFF) < 0xFD00)
3584 return NULL;
3585 }
3586
3587 for(kp = key; kp < key + LEN(key); kp++) {
3588 if(kp->k != k)
3589 continue;
3590
3591 if(!match(kp->mask, state))
3592 continue;
3593
3594 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3595 continue;
3596 if(term.numlock && kp->appkey == 2)
3597 continue;
3598
3599 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3600 continue;
3601
3602 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3603 continue;
3604
3605 return kp->s;
3606 }
3607
3608 return NULL;
3609 }
3610
3611 void
3612 kpress(XEvent *ev) {
3613 XKeyEvent *e = &ev->xkey;
3614 KeySym ksym;
3615 char buf[32], *customkey;
3616 int len;
3617 long c;
3618 Status status;
3619 Shortcut *bp;
3620
3621 if(IS_SET(MODE_KBDLOCK))
3622 return;
3623
3624 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3625 /* 1. shortcuts */
3626 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3627 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3628 bp->func(&(bp->arg));
3629 return;
3630 }
3631 }
3632
3633 /* 2. custom keys from config.h */
3634 if((customkey = kmap(ksym, e->state))) {
3635 ttysend(customkey, strlen(customkey));
3636 return;
3637 }
3638
3639 /* 3. composed string from input method */
3640 if(len == 0)
3641 return;
3642 if(len == 1 && e->state & Mod1Mask) {
3643 if(IS_SET(MODE_8BIT)) {
3644 if(*buf < 0177) {
3645 c = *buf | 0x80;
3646 len = utf8encode(c, buf, UTF_SIZ);
3647 }
3648 } else {
3649 buf[1] = buf[0];
3650 buf[0] = '\033';
3651 len = 2;
3652 }
3653 }
3654 ttysend(buf, len);
3655 }
3656
3657
3658 void
3659 cmessage(XEvent *e) {
3660 /*
3661 * See xembed specs
3662 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3663 */
3664 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3665 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3666 xw.state |= WIN_FOCUSED;
3667 xseturgency(0);
3668 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3669 xw.state &= ~WIN_FOCUSED;
3670 }
3671 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3672 /* Send SIGHUP to shell */
3673 kill(pid, SIGHUP);
3674 exit(EXIT_SUCCESS);
3675 }
3676 }
3677
3678 void
3679 cresize(int width, int height) {
3680 int col, row;
3681
3682 if(width != 0)
3683 xw.w = width;
3684 if(height != 0)
3685 xw.h = height;
3686
3687 col = (xw.w - 2 * borderpx) / xw.cw;
3688 row = (xw.h - 2 * borderpx) / xw.ch;
3689
3690 tresize(col, row);
3691 xresize(col, row);
3692 ttyresize();
3693 }
3694
3695 void
3696 resize(XEvent *e) {
3697 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3698 return;
3699
3700 cresize(e->xconfigure.width, e->xconfigure.height);
3701 }
3702
3703 void
3704 run(void) {
3705 XEvent ev;
3706 int w = xw.w, h = xw.h;
3707 fd_set rfd;
3708 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3709 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3710
3711 /* Waiting for window mapping */
3712 while(1) {
3713 XNextEvent(xw.dpy, &ev);
3714 if(ev.type == ConfigureNotify) {
3715 w = ev.xconfigure.width;
3716 h = ev.xconfigure.height;
3717 } else if(ev.type == MapNotify) {
3718 break;
3719 }
3720 }
3721
3722 ttynew();
3723 cresize(w, h);
3724
3725 gettimeofday(&last, NULL);
3726 lastblink = last;
3727
3728 for(xev = actionfps;;) {
3729 long deltatime;
3730
3731 FD_ZERO(&rfd);
3732 FD_SET(cmdfd, &rfd);
3733 FD_SET(xfd, &rfd);
3734
3735 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3736 if(errno == EINTR)
3737 continue;
3738 die("select failed: %s\n", strerror(errno));
3739 }
3740 if(FD_ISSET(cmdfd, &rfd)) {
3741 ttyread();
3742 if(blinktimeout) {
3743 blinkset = tattrset(ATTR_BLINK);
3744 if(!blinkset)
3745 MODBIT(term.mode, 0, MODE_BLINK);
3746 }
3747 }
3748
3749 if(FD_ISSET(xfd, &rfd))
3750 xev = actionfps;
3751
3752 gettimeofday(&now, NULL);
3753 drawtimeout.tv_sec = 0;
3754 drawtimeout.tv_usec = (1000/xfps) * 1000;
3755 tv = &drawtimeout;
3756
3757 dodraw = 0;
3758 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3759 tsetdirtattr(ATTR_BLINK);
3760 term.mode ^= MODE_BLINK;
3761 lastblink = now;
3762 dodraw = 1;
3763 }
3764 deltatime = TIMEDIFF(now, last);
3765 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3766 || deltatime < 0) {
3767 dodraw = 1;
3768 last = now;
3769 }
3770
3771 if(dodraw) {
3772 while(XPending(xw.dpy)) {
3773 XNextEvent(xw.dpy, &ev);
3774 if(XFilterEvent(&ev, None))
3775 continue;
3776 if(handler[ev.type])
3777 (handler[ev.type])(&ev);
3778 }
3779
3780 draw();
3781 XFlush(xw.dpy);
3782
3783 if(xev && !FD_ISSET(xfd, &rfd))
3784 xev--;
3785 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3786 if(blinkset) {
3787 if(TIMEDIFF(now, lastblink) \
3788 > blinktimeout) {
3789 drawtimeout.tv_usec = 1;
3790 } else {
3791 drawtimeout.tv_usec = (1000 * \
3792 (blinktimeout - \
3793 TIMEDIFF(now,
3794 lastblink)));
3795 }
3796 } else {
3797 tv = NULL;
3798 }
3799 }
3800 }
3801 }
3802 }
3803
3804 void
3805 usage(void) {
3806 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3807 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3808 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3809 }
3810
3811 int
3812 main(int argc, char *argv[]) {
3813 char *titles;
3814 uint cols = 80, rows = 24;
3815
3816 xw.l = xw.t = 0;
3817 xw.isfixed = False;
3818
3819 ARGBEGIN {
3820 case 'a':
3821 allowaltscreen = false;
3822 break;
3823 case 'c':
3824 opt_class = EARGF(usage());
3825 break;
3826 case 'e':
3827 /* eat all remaining arguments */
3828 if(argc > 1) {
3829 opt_cmd = &argv[1];
3830 if(argv[1] != NULL && opt_title == NULL) {
3831 titles = xstrdup(argv[1]);
3832 opt_title = basename(titles);
3833 }
3834 }
3835 goto run;
3836 case 'f':
3837 opt_font = EARGF(usage());
3838 break;
3839 case 'g':
3840 xw.gm = XParseGeometry(EARGF(usage()),
3841 &xw.l, &xw.t, &cols, &rows);
3842 break;
3843 case 'i':
3844 xw.isfixed = True;
3845 break;
3846 case 'o':
3847 opt_io = EARGF(usage());
3848 break;
3849 case 't':
3850 opt_title = EARGF(usage());
3851 break;
3852 case 'w':
3853 opt_embed = EARGF(usage());
3854 break;
3855 case 'v':
3856 default:
3857 usage();
3858 } ARGEND;
3859
3860 run:
3861 setlocale(LC_CTYPE, "");
3862 XSetLocaleModifiers("");
3863 tnew(cols? cols : 1, rows? rows : 1);
3864 xinit();
3865 selinit();
3866 run();
3867
3868 return 0;
3869 }
3870