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[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a)[0])
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define 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, /* DSC, 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, 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, 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 selcopy:
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(write(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 break;
1785 case 1: /* DECCKM -- Cursor key */
1786 MODBIT(term.mode, set, MODE_APPCURSOR);
1787 break;
1788 case 5: /* DECSCNM -- Reverse video */
1789 mode = term.mode;
1790 MODBIT(term.mode, set, MODE_REVERSE);
1791 if(mode != term.mode)
1792 redraw(REDRAW_TIMEOUT);
1793 break;
1794 case 6: /* DECOM -- Origin */
1795 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1796 tmoveato(0, 0);
1797 break;
1798 case 7: /* DECAWM -- Auto wrap */
1799 MODBIT(term.mode, set, MODE_WRAP);
1800 break;
1801 case 0: /* Error (IGNORED) */
1802 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1803 case 3: /* DECCOLM -- Column (IGNORED) */
1804 case 4: /* DECSCLM -- Scroll (IGNORED) */
1805 case 8: /* DECARM -- Auto repeat (IGNORED) */
1806 case 18: /* DECPFF -- Printer feed (IGNORED) */
1807 case 19: /* DECPEX -- Printer extent (IGNORED) */
1808 case 42: /* DECNRCM -- National characters (IGNORED) */
1809 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1810 break;
1811 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1812 MODBIT(term.mode, !set, MODE_HIDE);
1813 break;
1814 case 9: /* X10 mouse compatibility mode */
1815 xsetpointermotion(0);
1816 MODBIT(term.mode, 0, MODE_MOUSE);
1817 MODBIT(term.mode, set, MODE_MOUSEX10);
1818 break;
1819 case 1000: /* 1000: report button press */
1820 xsetpointermotion(0);
1821 MODBIT(term.mode, 0, MODE_MOUSE);
1822 MODBIT(term.mode, set, MODE_MOUSEBTN);
1823 break;
1824 case 1002: /* 1002: report motion on button press */
1825 xsetpointermotion(0);
1826 MODBIT(term.mode, 0, MODE_MOUSE);
1827 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1828 break;
1829 case 1003: /* 1003: enable all mouse motions */
1830 xsetpointermotion(set);
1831 MODBIT(term.mode, 0, MODE_MOUSE);
1832 MODBIT(term.mode, set, MODE_MOUSEMANY);
1833 break;
1834 case 1004: /* 1004: send focus events to tty */
1835 MODBIT(term.mode, set, MODE_FOCUS);
1836 break;
1837 case 1006: /* 1006: extended reporting mode */
1838 MODBIT(term.mode, set, MODE_MOUSESGR);
1839 break;
1840 case 1034:
1841 MODBIT(term.mode, set, MODE_8BIT);
1842 break;
1843 case 1049: /* swap screen & set/restore cursor as xterm */
1844 if (!allowaltscreen)
1845 break;
1846 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1847 /* FALLTHRU */
1848 case 47: /* swap screen */
1849 case 1047:
1850 if (!allowaltscreen)
1851 break;
1852 alt = IS_SET(MODE_ALTSCREEN);
1853 if(alt) {
1854 tclearregion(0, 0, term.col-1,
1855 term.row-1);
1856 }
1857 if(set ^ alt) /* set is always 1 or 0 */
1858 tswapscreen();
1859 if(*args != 1049)
1860 break;
1861 /* FALLTRU */
1862 case 1048:
1863 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1864 break;
1865 case 2004: /* 2004: bracketed paste mode */
1866 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1867 break;
1868 /* Not implemented mouse modes. See comments there. */
1869 case 1001: /* mouse highlight mode; can hang the
1870 terminal by design when implemented. */
1871 case 1005: /* UTF-8 mouse mode; will confuse
1872 applications not supporting UTF-8
1873 and luit. */
1874 case 1015: /* urxvt mangled mouse mode; incompatible
1875 and can be mistaken for other control
1876 codes. */
1877 default:
1878 fprintf(stderr,
1879 "erresc: unknown private set/reset mode %d\n",
1880 *args);
1881 break;
1882 }
1883 } else {
1884 switch(*args) {
1885 case 0: /* Error (IGNORED) */
1886 break;
1887 case 2: /* KAM -- keyboard action */
1888 MODBIT(term.mode, set, MODE_KBDLOCK);
1889 break;
1890 case 4: /* IRM -- Insertion-replacement */
1891 MODBIT(term.mode, set, MODE_INSERT);
1892 break;
1893 case 12: /* SRM -- Send/Receive */
1894 MODBIT(term.mode, !set, MODE_ECHO);
1895 break;
1896 case 20: /* LNM -- Linefeed/new line */
1897 MODBIT(term.mode, set, MODE_CRLF);
1898 break;
1899 default:
1900 fprintf(stderr,
1901 "erresc: unknown set/reset mode %d\n",
1902 *args);
1903 break;
1904 }
1905 }
1906 }
1907 }
1908
1909 void
1910 csihandle(void) {
1911 char buf[40];
1912 int len;
1913
1914 switch(csiescseq.mode) {
1915 default:
1916 unknown:
1917 fprintf(stderr, "erresc: unknown csi ");
1918 csidump();
1919 /* die(""); */
1920 break;
1921 case '@': /* ICH -- Insert <n> blank char */
1922 DEFAULT(csiescseq.arg[0], 1);
1923 tinsertblank(csiescseq.arg[0]);
1924 break;
1925 case 'A': /* CUU -- Cursor <n> Up */
1926 DEFAULT(csiescseq.arg[0], 1);
1927 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1928 break;
1929 case 'B': /* CUD -- Cursor <n> Down */
1930 case 'e': /* VPR --Cursor <n> Down */
1931 DEFAULT(csiescseq.arg[0], 1);
1932 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1933 break;
1934 case 'i': /* MC -- Media Copy */
1935 switch(csiescseq.arg[0]) {
1936 case 0:
1937 tdump();
1938 break;
1939 case 1:
1940 tdumpline(term.c.y);
1941 break;
1942 case 2:
1943 tdumpsel();
1944 break;
1945 case 4:
1946 term.mode &= ~MODE_PRINT;
1947 break;
1948 case 5:
1949 term.mode |= MODE_PRINT;
1950 break;
1951 }
1952 break;
1953 case 'c': /* DA -- Device Attributes */
1954 if(csiescseq.arg[0] == 0)
1955 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1956 break;
1957 case 'C': /* CUF -- Cursor <n> Forward */
1958 case 'a': /* HPR -- Cursor <n> Forward */
1959 DEFAULT(csiescseq.arg[0], 1);
1960 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1961 break;
1962 case 'D': /* CUB -- Cursor <n> Backward */
1963 DEFAULT(csiescseq.arg[0], 1);
1964 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1965 break;
1966 case 'E': /* CNL -- Cursor <n> Down and first col */
1967 DEFAULT(csiescseq.arg[0], 1);
1968 tmoveto(0, term.c.y+csiescseq.arg[0]);
1969 break;
1970 case 'F': /* CPL -- Cursor <n> Up and first col */
1971 DEFAULT(csiescseq.arg[0], 1);
1972 tmoveto(0, term.c.y-csiescseq.arg[0]);
1973 break;
1974 case 'g': /* TBC -- Tabulation clear */
1975 switch(csiescseq.arg[0]) {
1976 case 0: /* clear current tab stop */
1977 term.tabs[term.c.x] = 0;
1978 break;
1979 case 3: /* clear all the tabs */
1980 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1981 break;
1982 default:
1983 goto unknown;
1984 }
1985 break;
1986 case 'G': /* CHA -- Move to <col> */
1987 case '`': /* HPA */
1988 DEFAULT(csiescseq.arg[0], 1);
1989 tmoveto(csiescseq.arg[0]-1, term.c.y);
1990 break;
1991 case 'H': /* CUP -- Move to <row> <col> */
1992 case 'f': /* HVP */
1993 DEFAULT(csiescseq.arg[0], 1);
1994 DEFAULT(csiescseq.arg[1], 1);
1995 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1996 break;
1997 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1998 DEFAULT(csiescseq.arg[0], 1);
1999 tputtab(csiescseq.arg[0]);
2000 break;
2001 case 'J': /* ED -- Clear screen */
2002 selclear(NULL);
2003 switch(csiescseq.arg[0]) {
2004 case 0: /* below */
2005 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2006 if(term.c.y < term.row-1) {
2007 tclearregion(0, term.c.y+1, term.col-1,
2008 term.row-1);
2009 }
2010 break;
2011 case 1: /* above */
2012 if(term.c.y > 1)
2013 tclearregion(0, 0, term.col-1, term.c.y-1);
2014 tclearregion(0, term.c.y, term.c.x, term.c.y);
2015 break;
2016 case 2: /* all */
2017 tclearregion(0, 0, term.col-1, term.row-1);
2018 break;
2019 default:
2020 goto unknown;
2021 }
2022 break;
2023 case 'K': /* EL -- Clear line */
2024 switch(csiescseq.arg[0]) {
2025 case 0: /* right */
2026 tclearregion(term.c.x, term.c.y, term.col-1,
2027 term.c.y);
2028 break;
2029 case 1: /* left */
2030 tclearregion(0, term.c.y, term.c.x, term.c.y);
2031 break;
2032 case 2: /* all */
2033 tclearregion(0, term.c.y, term.col-1, term.c.y);
2034 break;
2035 }
2036 break;
2037 case 'S': /* SU -- Scroll <n> line up */
2038 DEFAULT(csiescseq.arg[0], 1);
2039 tscrollup(term.top, csiescseq.arg[0]);
2040 break;
2041 case 'T': /* SD -- Scroll <n> line down */
2042 DEFAULT(csiescseq.arg[0], 1);
2043 tscrolldown(term.top, csiescseq.arg[0]);
2044 break;
2045 case 'L': /* IL -- Insert <n> blank lines */
2046 DEFAULT(csiescseq.arg[0], 1);
2047 tinsertblankline(csiescseq.arg[0]);
2048 break;
2049 case 'l': /* RM -- Reset Mode */
2050 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2051 break;
2052 case 'M': /* DL -- Delete <n> lines */
2053 DEFAULT(csiescseq.arg[0], 1);
2054 tdeleteline(csiescseq.arg[0]);
2055 break;
2056 case 'X': /* ECH -- Erase <n> char */
2057 DEFAULT(csiescseq.arg[0], 1);
2058 tclearregion(term.c.x, term.c.y,
2059 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2060 break;
2061 case 'P': /* DCH -- Delete <n> char */
2062 DEFAULT(csiescseq.arg[0], 1);
2063 tdeletechar(csiescseq.arg[0]);
2064 break;
2065 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2066 DEFAULT(csiescseq.arg[0], 1);
2067 tputtab(-csiescseq.arg[0]);
2068 break;
2069 case 'd': /* VPA -- Move to <row> */
2070 DEFAULT(csiescseq.arg[0], 1);
2071 tmoveato(term.c.x, csiescseq.arg[0]-1);
2072 break;
2073 case 'h': /* SM -- Set terminal mode */
2074 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2075 break;
2076 case 'm': /* SGR -- Terminal attribute (color) */
2077 tsetattr(csiescseq.arg, csiescseq.narg);
2078 break;
2079 case 'n': /* DSR – Device Status Report (cursor position) */
2080 if (csiescseq.arg[0] == 6) {
2081 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2082 term.c.y+1, term.c.x+1);
2083 ttywrite(buf, len);
2084 break;
2085 }
2086 case 'r': /* DECSTBM -- Set Scrolling Region */
2087 if(csiescseq.priv) {
2088 goto unknown;
2089 } else {
2090 DEFAULT(csiescseq.arg[0], 1);
2091 DEFAULT(csiescseq.arg[1], term.row);
2092 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2093 tmoveato(0, 0);
2094 }
2095 break;
2096 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2097 tcursor(CURSOR_SAVE);
2098 break;
2099 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2100 tcursor(CURSOR_LOAD);
2101 break;
2102 }
2103 }
2104
2105 void
2106 csidump(void) {
2107 int i;
2108 uint c;
2109
2110 printf("ESC[");
2111 for(i = 0; i < csiescseq.len; i++) {
2112 c = csiescseq.buf[i] & 0xff;
2113 if(isprint(c)) {
2114 putchar(c);
2115 } else if(c == '\n') {
2116 printf("(\\n)");
2117 } else if(c == '\r') {
2118 printf("(\\r)");
2119 } else if(c == 0x1b) {
2120 printf("(\\e)");
2121 } else {
2122 printf("(%02x)", c);
2123 }
2124 }
2125 putchar('\n');
2126 }
2127
2128 void
2129 csireset(void) {
2130 memset(&csiescseq, 0, sizeof(csiescseq));
2131 }
2132
2133 void
2134 strhandle(void) {
2135 char *p = NULL;
2136 int j, narg, par;
2137
2138 strparse();
2139 narg = strescseq.narg;
2140 par = atoi(strescseq.args[0]);
2141
2142 switch(strescseq.type) {
2143 case ']': /* OSC -- Operating System Command */
2144 switch(par) {
2145 case 0:
2146 case 1:
2147 case 2:
2148 if(narg > 1)
2149 xsettitle(strescseq.args[1]);
2150 return;
2151 case 4: /* color set */
2152 if(narg < 3)
2153 break;
2154 p = strescseq.args[2];
2155 /* fall through */
2156 case 104: /* color reset, here p = NULL */
2157 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2158 if (!xsetcolorname(j, p)) {
2159 fprintf(stderr, "erresc: invalid color %s\n", p);
2160 } else {
2161 /*
2162 * TODO if defaultbg color is changed, borders
2163 * are dirty
2164 */
2165 redraw(0);
2166 }
2167 return;
2168 }
2169 break;
2170 case 'k': /* old title set compatibility */
2171 xsettitle(strescseq.args[0]);
2172 return;
2173 case 'P': /* DSC -- Device Control String */
2174 case '_': /* APC -- Application Program Command */
2175 case '^': /* PM -- Privacy Message */
2176 return;
2177 }
2178
2179 fprintf(stderr, "erresc: unknown str ");
2180 strdump();
2181 }
2182
2183 void
2184 strparse(void) {
2185 char *p = strescseq.buf;
2186
2187 strescseq.narg = 0;
2188 strescseq.buf[strescseq.len] = '\0';
2189 while(p && strescseq.narg < STR_ARG_SIZ)
2190 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2191 }
2192
2193 void
2194 strdump(void) {
2195 int i;
2196 uint c;
2197
2198 printf("ESC%c", strescseq.type);
2199 for(i = 0; i < strescseq.len; i++) {
2200 c = strescseq.buf[i] & 0xff;
2201 if(c == '\0') {
2202 return;
2203 } else if(isprint(c)) {
2204 putchar(c);
2205 } else if(c == '\n') {
2206 printf("(\\n)");
2207 } else if(c == '\r') {
2208 printf("(\\r)");
2209 } else if(c == 0x1b) {
2210 printf("(\\e)");
2211 } else {
2212 printf("(%02x)", c);
2213 }
2214 }
2215 printf("ESC\\\n");
2216 }
2217
2218 void
2219 strreset(void) {
2220 memset(&strescseq, 0, sizeof(strescseq));
2221 }
2222
2223 void
2224 tprinter(char *s, size_t len) {
2225 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2226 fprintf(stderr, "Error writing in %s:%s\n",
2227 opt_io, strerror(errno));
2228 close(iofd);
2229 iofd = -1;
2230 }
2231 }
2232
2233 void
2234 toggleprinter(const Arg *arg) {
2235 term.mode ^= MODE_PRINT;
2236 }
2237
2238 void
2239 printscreen(const Arg *arg) {
2240 tdump();
2241 }
2242
2243 void
2244 printsel(const Arg *arg) {
2245 tdumpsel();
2246 }
2247
2248 void
2249 tdumpsel(void) {
2250 char *ptr;
2251
2252 if((ptr = getsel())) {
2253 tprinter(ptr, strlen(ptr));
2254 free(ptr);
2255 }
2256 }
2257
2258 void
2259 tdumpline(int n) {
2260 Glyph *bp, *end;
2261
2262 bp = &term.line[n][0];
2263 end = &bp[term.col-1];
2264 while(end > bp && !strcmp(" ", end->c))
2265 --end;
2266 if(bp != end || strcmp(bp->c, " ")) {
2267 for( ;bp <= end; ++bp)
2268 tprinter(bp->c, strlen(bp->c));
2269 }
2270 tprinter("\n", 1);
2271 }
2272
2273 void
2274 tdump(void) {
2275 int i;
2276
2277 for(i = 0; i < term.row; ++i)
2278 tdumpline(i);
2279 }
2280
2281 void
2282 tputtab(int n) {
2283 uint x = term.c.x;
2284
2285 if(n > 0) {
2286 while(x < term.col && n--)
2287 for(++x; x < term.col && !term.tabs[x]; ++x)
2288 /* nothing */ ;
2289 } else if(n < 0) {
2290 while(x > 0 && n++)
2291 for(--x; x > 0 && !term.tabs[x]; --x)
2292 /* nothing */ ;
2293 }
2294 tmoveto(x, term.c.y);
2295 }
2296
2297 void
2298 techo(char *buf, int len) {
2299 for(; len > 0; buf++, len--) {
2300 char c = *buf;
2301
2302 if(c < 0x20 || c == 0177) { /* control code */
2303 if(c != '\n' && c != '\r' && c != '\t') {
2304 c ^= '\x40';
2305 tputc("^", 1);
2306 }
2307 tputc(&c, 1);
2308 } else {
2309 break;
2310 }
2311 }
2312 if(len)
2313 tputc(buf, len);
2314 }
2315
2316 void
2317 tdeftran(char ascii) {
2318 char c, (*bp)[2];
2319 static char tbl[][2] = {
2320 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2321 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2322 {'5', CS_FIN}, {'C', CS_FIN},
2323 {0, 0}
2324 };
2325
2326 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2327 /* nothing */;
2328
2329 if (c == 0)
2330 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2331 else
2332 term.trantbl[term.icharset] = (*bp)[1];
2333 }
2334
2335 void
2336 tselcs(void) {
2337 MODBIT(term.c.attr.mode,
2338 term.trantbl[term.charset] == CS_GRAPHIC0,
2339 ATTR_GFX);
2340 }
2341
2342 void
2343 tputc(char *c, int len) {
2344 uchar ascii = *c;
2345 bool control = ascii < '\x20' || ascii == 0177;
2346 long unicodep;
2347 int width;
2348
2349 if(len == 1) {
2350 width = 1;
2351 } else {
2352 utf8decode(c, &unicodep, UTF_SIZ);
2353 width = wcwidth(unicodep);
2354 }
2355
2356 if(IS_SET(MODE_PRINT))
2357 tprinter(c, len);
2358
2359 /*
2360 * STR sequences must be checked before anything else
2361 * because it can use some control codes as part of the sequence.
2362 */
2363 if(term.esc & ESC_STR) {
2364 switch(ascii) {
2365 case '\033':
2366 term.esc = ESC_START | ESC_STR_END;
2367 break;
2368 case '\a': /* backwards compatibility to xterm */
2369 term.esc = 0;
2370 strhandle();
2371 break;
2372 default:
2373 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2374 memmove(&strescseq.buf[strescseq.len], c, len);
2375 strescseq.len += len;
2376 } else {
2377 /*
2378 * Here is a bug in terminals. If the user never sends
2379 * some code to stop the str or esc command, then st
2380 * will stop responding. But this is better than
2381 * silently failing with unknown characters. At least
2382 * then users will report back.
2383 *
2384 * In the case users ever get fixed, here is the code:
2385 */
2386 /*
2387 * term.esc = 0;
2388 * strhandle();
2389 */
2390 }
2391 }
2392 return;
2393 }
2394
2395 /*
2396 * Actions of control codes must be performed as soon they arrive
2397 * because they can be embedded inside a control sequence, and
2398 * they must not cause conflicts with sequences.
2399 */
2400 if(control) {
2401 switch(ascii) {
2402 case '\t': /* HT */
2403 tputtab(1);
2404 return;
2405 case '\b': /* BS */
2406 tmoveto(term.c.x-1, term.c.y);
2407 return;
2408 case '\r': /* CR */
2409 tmoveto(0, term.c.y);
2410 return;
2411 case '\f': /* LF */
2412 case '\v': /* VT */
2413 case '\n': /* LF */
2414 /* go to first col if the mode is set */
2415 tnewline(IS_SET(MODE_CRLF));
2416 return;
2417 case '\a': /* BEL */
2418 if(!(xw.state & WIN_FOCUSED))
2419 xseturgency(1);
2420 if (bellvolume)
2421 XBell(xw.dpy, bellvolume);
2422 return;
2423 case '\033': /* ESC */
2424 csireset();
2425 term.esc = ESC_START;
2426 return;
2427 case '\016': /* SO */
2428 term.charset = 0;
2429 tselcs();
2430 return;
2431 case '\017': /* SI */
2432 term.charset = 1;
2433 tselcs();
2434 return;
2435 case '\032': /* SUB */
2436 case '\030': /* CAN */
2437 csireset();
2438 return;
2439 case '\005': /* ENQ (IGNORED) */
2440 case '\000': /* NUL (IGNORED) */
2441 case '\021': /* XON (IGNORED) */
2442 case '\023': /* XOFF (IGNORED) */
2443 case 0177: /* DEL (IGNORED) */
2444 return;
2445 }
2446 } else if(term.esc & ESC_START) {
2447 if(term.esc & ESC_CSI) {
2448 csiescseq.buf[csiescseq.len++] = ascii;
2449 if(BETWEEN(ascii, 0x40, 0x7E)
2450 || csiescseq.len >= \
2451 sizeof(csiescseq.buf)-1) {
2452 term.esc = 0;
2453 csiparse();
2454 csihandle();
2455 }
2456 } else if(term.esc & ESC_STR_END) {
2457 term.esc = 0;
2458 if(ascii == '\\')
2459 strhandle();
2460 } else if(term.esc & ESC_ALTCHARSET) {
2461 tdeftran(ascii);
2462 tselcs();
2463 term.esc = 0;
2464 } else if(term.esc & ESC_TEST) {
2465 if(ascii == '8') { /* DEC screen alignment test. */
2466 char E[UTF_SIZ] = "E";
2467 int x, y;
2468
2469 for(x = 0; x < term.col; ++x) {
2470 for(y = 0; y < term.row; ++y)
2471 tsetchar(E, &term.c.attr, x, y);
2472 }
2473 }
2474 term.esc = 0;
2475 } else {
2476 switch(ascii) {
2477 case '[':
2478 term.esc |= ESC_CSI;
2479 break;
2480 case '#':
2481 term.esc |= ESC_TEST;
2482 break;
2483 case 'P': /* DCS -- Device Control String */
2484 case '_': /* APC -- Application Program Command */
2485 case '^': /* PM -- Privacy Message */
2486 case ']': /* OSC -- Operating System Command */
2487 case 'k': /* old title set compatibility */
2488 strreset();
2489 strescseq.type = ascii;
2490 term.esc |= ESC_STR;
2491 break;
2492 case '(': /* set primary charset G0 */
2493 case ')': /* set secondary charset G1 */
2494 case '*': /* set tertiary charset G2 */
2495 case '+': /* set quaternary charset G3 */
2496 term.icharset = ascii - '(';
2497 term.esc |= ESC_ALTCHARSET;
2498 break;
2499 case 'D': /* IND -- Linefeed */
2500 if(term.c.y == term.bot) {
2501 tscrollup(term.top, 1);
2502 } else {
2503 tmoveto(term.c.x, term.c.y+1);
2504 }
2505 term.esc = 0;
2506 break;
2507 case 'E': /* NEL -- Next line */
2508 tnewline(1); /* always go to first col */
2509 term.esc = 0;
2510 break;
2511 case 'H': /* HTS -- Horizontal tab stop */
2512 term.tabs[term.c.x] = 1;
2513 term.esc = 0;
2514 break;
2515 case 'M': /* RI -- Reverse index */
2516 if(term.c.y == term.top) {
2517 tscrolldown(term.top, 1);
2518 } else {
2519 tmoveto(term.c.x, term.c.y-1);
2520 }
2521 term.esc = 0;
2522 break;
2523 case 'Z': /* DECID -- Identify Terminal */
2524 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2525 term.esc = 0;
2526 break;
2527 case 'c': /* RIS -- Reset to inital state */
2528 treset();
2529 term.esc = 0;
2530 xresettitle();
2531 xloadcols();
2532 break;
2533 case '=': /* DECPAM -- Application keypad */
2534 term.mode |= MODE_APPKEYPAD;
2535 term.esc = 0;
2536 break;
2537 case '>': /* DECPNM -- Normal keypad */
2538 term.mode &= ~MODE_APPKEYPAD;
2539 term.esc = 0;
2540 break;
2541 case '7': /* DECSC -- Save Cursor */
2542 tcursor(CURSOR_SAVE);
2543 term.esc = 0;
2544 break;
2545 case '8': /* DECRC -- Restore Cursor */
2546 tcursor(CURSOR_LOAD);
2547 term.esc = 0;
2548 break;
2549 case '\\': /* ST -- Stop */
2550 term.esc = 0;
2551 break;
2552 default:
2553 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2554 (uchar) ascii, isprint(ascii)? ascii:'.');
2555 term.esc = 0;
2556 }
2557 }
2558 /*
2559 * All characters which form part of a sequence are not
2560 * printed
2561 */
2562 return;
2563 }
2564 /*
2565 * Display control codes only if we are in graphic mode
2566 */
2567 if(control && !(term.c.attr.mode & ATTR_GFX))
2568 return;
2569 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2570 selclear(NULL);
2571 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2572 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2573 tnewline(1);
2574 }
2575
2576 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2577 memmove(&term.line[term.c.y][term.c.x+1],
2578 &term.line[term.c.y][term.c.x],
2579 (term.col - term.c.x - 1) * sizeof(Glyph));
2580 }
2581
2582 if(term.c.x+width > term.col)
2583 tnewline(1);
2584
2585 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2586
2587 if(width == 2) {
2588 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2589 if(term.c.x+1 < term.col) {
2590 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2591 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2592 }
2593 }
2594 if(term.c.x+width < term.col) {
2595 tmoveto(term.c.x+width, term.c.y);
2596 } else {
2597 term.c.state |= CURSOR_WRAPNEXT;
2598 }
2599 }
2600
2601 int
2602 tresize(int col, int row) {
2603 int i;
2604 int minrow = MIN(row, term.row);
2605 int mincol = MIN(col, term.col);
2606 int slide = term.c.y - row + 1;
2607 bool *bp;
2608 Line *orig;
2609
2610 if(col < 1 || row < 1)
2611 return 0;
2612
2613 /* free unneeded rows */
2614 i = 0;
2615 if(slide > 0) {
2616 /*
2617 * slide screen to keep cursor where we expect it -
2618 * tscrollup would work here, but we can optimize to
2619 * memmove because we're freeing the earlier lines
2620 */
2621 for(/* i = 0 */; i < slide; i++) {
2622 free(term.line[i]);
2623 free(term.alt[i]);
2624 }
2625 memmove(term.line, term.line + slide, row * sizeof(Line));
2626 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2627 }
2628 for(i += row; i < term.row; i++) {
2629 free(term.line[i]);
2630 free(term.alt[i]);
2631 }
2632
2633 /* resize to new height */
2634 term.line = xrealloc(term.line, row * sizeof(Line));
2635 term.alt = xrealloc(term.alt, row * sizeof(Line));
2636 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2637 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2638
2639 /* resize each row to new width, zero-pad if needed */
2640 for(i = 0; i < minrow; i++) {
2641 term.dirty[i] = 1;
2642 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2643 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2644 }
2645
2646 /* allocate any new rows */
2647 for(/* i == minrow */; i < row; i++) {
2648 term.dirty[i] = 1;
2649 term.line[i] = xmalloc(col * sizeof(Glyph));
2650 term.alt[i] = xmalloc(col * sizeof(Glyph));
2651 }
2652 if(col > term.col) {
2653 bp = term.tabs + term.col;
2654
2655 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2656 while(--bp > term.tabs && !*bp)
2657 /* nothing */ ;
2658 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2659 *bp = 1;
2660 }
2661 /* update terminal size */
2662 term.col = col;
2663 term.row = row;
2664 /* reset scrolling region */
2665 tsetscroll(0, row-1);
2666 /* make use of the LIMIT in tmoveto */
2667 tmoveto(term.c.x, term.c.y);
2668 /* Clearing both screens */
2669 orig = term.line;
2670 do {
2671 if(mincol < col && 0 < minrow) {
2672 tclearregion(mincol, 0, col - 1, minrow - 1);
2673 }
2674 if(0 < col && minrow < row) {
2675 tclearregion(0, minrow, col - 1, row - 1);
2676 }
2677 tswapscreen();
2678 } while(orig != term.line);
2679
2680 return (slide > 0);
2681 }
2682
2683 void
2684 xresize(int col, int row) {
2685 xw.tw = MAX(1, col * xw.cw);
2686 xw.th = MAX(1, row * xw.ch);
2687
2688 XFreePixmap(xw.dpy, xw.buf);
2689 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2690 DefaultDepth(xw.dpy, xw.scr));
2691 XftDrawChange(xw.draw, xw.buf);
2692 xclear(0, 0, xw.w, xw.h);
2693 }
2694
2695 static inline ushort
2696 sixd_to_16bit(int x) {
2697 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2698 }
2699
2700 void
2701 xloadcols(void) {
2702 int i, r, g, b;
2703 XRenderColor color = { .alpha = 0xffff };
2704 static bool loaded;
2705 Colour *cp;
2706
2707 if(loaded) {
2708 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2709 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2710 }
2711
2712 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2713 for(i = 0; i < LEN(colorname); i++) {
2714 if(!colorname[i])
2715 continue;
2716 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2717 die("Could not allocate color '%s'\n", colorname[i]);
2718 }
2719 }
2720
2721 /* load colors [16-255] ; same colors as xterm */
2722 for(i = 16, r = 0; r < 6; r++) {
2723 for(g = 0; g < 6; g++) {
2724 for(b = 0; b < 6; b++) {
2725 color.red = sixd_to_16bit(r);
2726 color.green = sixd_to_16bit(g);
2727 color.blue = sixd_to_16bit(b);
2728 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2729 die("Could not allocate color %d\n", i);
2730 }
2731 i++;
2732 }
2733 }
2734 }
2735
2736 for(r = 0; r < 24; r++, i++) {
2737 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2738 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2739 &dc.col[i])) {
2740 die("Could not allocate color %d\n", i);
2741 }
2742 }
2743 loaded = true;
2744 }
2745
2746 int
2747 xsetcolorname(int x, const char *name) {
2748 XRenderColor color = { .alpha = 0xffff };
2749 Colour colour;
2750 if(!BETWEEN(x, 0, LEN(colorname)))
2751 return -1;
2752 if(!name) {
2753 if(BETWEEN(x, 16, 16 + 215)) {
2754 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2755 color.red = sixd_to_16bit(r);
2756 color.green = sixd_to_16bit(g);
2757 color.blue = sixd_to_16bit(b);
2758 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2759 return 0; /* something went wrong */
2760 dc.col[x] = colour;
2761 return 1;
2762 } else if(BETWEEN(x, 16 + 216, 255)) {
2763 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2764 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2765 return 0; /* something went wrong */
2766 dc.col[x] = colour;
2767 return 1;
2768 } else {
2769 name = colorname[x];
2770 }
2771 }
2772 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2773 return 0;
2774 dc.col[x] = colour;
2775 return 1;
2776 }
2777
2778 void
2779 xtermclear(int col1, int row1, int col2, int row2) {
2780 XftDrawRect(xw.draw,
2781 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2782 borderpx + col1 * xw.cw,
2783 borderpx + row1 * xw.ch,
2784 (col2-col1+1) * xw.cw,
2785 (row2-row1+1) * xw.ch);
2786 }
2787
2788 /*
2789 * Absolute coordinates.
2790 */
2791 void
2792 xclear(int x1, int y1, int x2, int y2) {
2793 XftDrawRect(xw.draw,
2794 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2795 x1, y1, x2-x1, y2-y1);
2796 }
2797
2798 void
2799 xhints(void) {
2800 XClassHint class = {opt_class ? opt_class : termname, termname};
2801 XWMHints wm = {.flags = InputHint, .input = 1};
2802 XSizeHints *sizeh = NULL;
2803
2804 sizeh = XAllocSizeHints();
2805
2806 sizeh->flags = PSize | PResizeInc | PBaseSize;
2807 sizeh->height = xw.h;
2808 sizeh->width = xw.w;
2809 sizeh->height_inc = xw.ch;
2810 sizeh->width_inc = xw.cw;
2811 sizeh->base_height = 2 * borderpx;
2812 sizeh->base_width = 2 * borderpx;
2813 if(xw.isfixed == True) {
2814 sizeh->flags |= PMaxSize | PMinSize;
2815 sizeh->min_width = sizeh->max_width = xw.w;
2816 sizeh->min_height = sizeh->max_height = xw.h;
2817 }
2818 if(xw.gm & (XValue|YValue)) {
2819 sizeh->flags |= USPosition | PWinGravity;
2820 sizeh->x = xw.l;
2821 sizeh->y = xw.t;
2822 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2823 }
2824
2825 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2826 &class);
2827 XFree(sizeh);
2828 }
2829
2830 int
2831 xgeommasktogravity(int mask) {
2832 switch(mask & (XNegative|YNegative)) {
2833 case 0:
2834 return NorthWestGravity;
2835 case XNegative:
2836 return NorthEastGravity;
2837 case YNegative:
2838 return SouthWestGravity;
2839 }
2840 return SouthEastGravity;
2841 }
2842
2843 int
2844 xloadfont(Font *f, FcPattern *pattern) {
2845 FcPattern *match;
2846 FcResult result;
2847
2848 match = FcFontMatch(NULL, pattern, &result);
2849 if(!match)
2850 return 1;
2851
2852 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2853 FcPatternDestroy(match);
2854 return 1;
2855 }
2856
2857 f->set = NULL;
2858 f->pattern = FcPatternDuplicate(pattern);
2859
2860 f->ascent = f->match->ascent;
2861 f->descent = f->match->descent;
2862 f->lbearing = 0;
2863 f->rbearing = f->match->max_advance_width;
2864
2865 f->height = f->ascent + f->descent;
2866 f->width = f->lbearing + f->rbearing;
2867
2868 return 0;
2869 }
2870
2871 void
2872 xloadfonts(char *fontstr, double fontsize) {
2873 FcPattern *pattern;
2874 FcResult r_sz, r_psz;
2875 double fontval;
2876
2877 if(fontstr[0] == '-') {
2878 pattern = XftXlfdParse(fontstr, False, False);
2879 } else {
2880 pattern = FcNameParse((FcChar8 *)fontstr);
2881 }
2882
2883 if(!pattern)
2884 die("st: can't open font %s\n", fontstr);
2885
2886 if(fontsize > 0) {
2887 FcPatternDel(pattern, FC_PIXEL_SIZE);
2888 FcPatternDel(pattern, FC_SIZE);
2889 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2890 usedfontsize = fontsize;
2891 } else {
2892 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2893 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2894 if(r_psz == FcResultMatch) {
2895 usedfontsize = fontval;
2896 } else if(r_sz == FcResultMatch) {
2897 usedfontsize = -1;
2898 } else {
2899 /*
2900 * Default font size is 12, if none given. This is to
2901 * have a known usedfontsize value.
2902 */
2903 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2904 usedfontsize = 12;
2905 }
2906 }
2907
2908 FcConfigSubstitute(0, pattern, FcMatchPattern);
2909 FcDefaultSubstitute(pattern);
2910
2911 if(xloadfont(&dc.font, pattern))
2912 die("st: can't open font %s\n", fontstr);
2913
2914 if(usedfontsize < 0) {
2915 FcPatternGetDouble(dc.font.match->pattern,
2916 FC_PIXEL_SIZE, 0, &fontval);
2917 usedfontsize = fontval;
2918 }
2919
2920 /* Setting character width and height. */
2921 xw.cw = CEIL(dc.font.width * cwscale);
2922 xw.ch = CEIL(dc.font.height * chscale);
2923
2924 FcPatternDel(pattern, FC_SLANT);
2925 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2926 if(xloadfont(&dc.ifont, pattern))
2927 die("st: can't open font %s\n", fontstr);
2928
2929 FcPatternDel(pattern, FC_WEIGHT);
2930 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2931 if(xloadfont(&dc.ibfont, pattern))
2932 die("st: can't open font %s\n", fontstr);
2933
2934 FcPatternDel(pattern, FC_SLANT);
2935 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2936 if(xloadfont(&dc.bfont, pattern))
2937 die("st: can't open font %s\n", fontstr);
2938
2939 FcPatternDestroy(pattern);
2940 }
2941
2942 int
2943 xloadfontset(Font *f) {
2944 FcResult result;
2945
2946 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2947 return 1;
2948 return 0;
2949 }
2950
2951 void
2952 xunloadfont(Font *f) {
2953 XftFontClose(xw.dpy, f->match);
2954 FcPatternDestroy(f->pattern);
2955 if(f->set)
2956 FcFontSetDestroy(f->set);
2957 }
2958
2959 void
2960 xunloadfonts(void) {
2961 int i;
2962
2963 /* Free the loaded fonts in the font cache. */
2964 for(i = 0; i < frclen; i++) {
2965 XftFontClose(xw.dpy, frc[i].font);
2966 }
2967 frclen = 0;
2968
2969 xunloadfont(&dc.font);
2970 xunloadfont(&dc.bfont);
2971 xunloadfont(&dc.ifont);
2972 xunloadfont(&dc.ibfont);
2973 }
2974
2975 void
2976 xzoom(const Arg *arg) {
2977 xunloadfonts();
2978 xloadfonts(usedfont, usedfontsize + arg->i);
2979 cresize(0, 0);
2980 redraw(0);
2981 }
2982
2983 void
2984 xinit(void) {
2985 XGCValues gcvalues;
2986 Cursor cursor;
2987 Window parent;
2988 pid_t thispid = getpid();
2989
2990 if(!(xw.dpy = XOpenDisplay(NULL)))
2991 die("Can't open display\n");
2992 xw.scr = XDefaultScreen(xw.dpy);
2993 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2994
2995 /* font */
2996 if(!FcInit())
2997 die("Could not init fontconfig.\n");
2998
2999 usedfont = (opt_font == NULL)? font : opt_font;
3000 xloadfonts(usedfont, 0);
3001
3002 /* colors */
3003 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3004 xloadcols();
3005
3006 /* adjust fixed window geometry */
3007 xw.w = 2 * borderpx + term.col * xw.cw;
3008 xw.h = 2 * borderpx + term.row * xw.ch;
3009 if(xw.gm & XNegative)
3010 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3011 if(xw.gm & YNegative)
3012 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3013
3014 /* Events */
3015 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3016 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3017 xw.attrs.bit_gravity = NorthWestGravity;
3018 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3019 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3020 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3021 xw.attrs.colormap = xw.cmap;
3022
3023 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3024 XRootWindow(xw.dpy, xw.scr);
3025 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3026 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3027 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3028 | CWEventMask | CWColormap, &xw.attrs);
3029
3030 memset(&gcvalues, 0, sizeof(gcvalues));
3031 gcvalues.graphics_exposures = False;
3032 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3033 &gcvalues);
3034 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3035 DefaultDepth(xw.dpy, xw.scr));
3036 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3037 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3038
3039 /* Xft rendering context */
3040 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3041
3042 /* input methods */
3043 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3044 XSetLocaleModifiers("@im=local");
3045 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3046 XSetLocaleModifiers("@im=");
3047 if((xw.xim = XOpenIM(xw.dpy,
3048 NULL, NULL, NULL)) == NULL) {
3049 die("XOpenIM failed. Could not open input"
3050 " device.\n");
3051 }
3052 }
3053 }
3054 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3055 | XIMStatusNothing, XNClientWindow, xw.win,
3056 XNFocusWindow, xw.win, NULL);
3057 if(xw.xic == NULL)
3058 die("XCreateIC failed. Could not obtain input method.\n");
3059
3060 /* white cursor, black outline */
3061 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3062 XDefineCursor(xw.dpy, xw.win, cursor);
3063 XRecolorCursor(xw.dpy, cursor,
3064 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3065 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3066
3067 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3068 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3069 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3070 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3071
3072 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3073 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3074 PropModeReplace, (uchar *)&thispid, 1);
3075
3076 xresettitle();
3077 XMapWindow(xw.dpy, xw.win);
3078 xhints();
3079 XSync(xw.dpy, False);
3080 }
3081
3082 void
3083 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3084 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3085 width = charlen * xw.cw, xp, i;
3086 int frcflags;
3087 int u8fl, u8fblen, u8cblen, doesexist;
3088 char *u8c, *u8fs;
3089 long unicodep;
3090 Font *font = &dc.font;
3091 FcResult fcres;
3092 FcPattern *fcpattern, *fontpattern;
3093 FcFontSet *fcsets[] = { NULL };
3094 FcCharSet *fccharset;
3095 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3096 XRenderColor colfg, colbg;
3097 XRectangle r;
3098 int oneatatime;
3099
3100 frcflags = FRC_NORMAL;
3101
3102 if(base.mode & ATTR_ITALIC) {
3103 if(base.fg == defaultfg)
3104 base.fg = defaultitalic;
3105 font = &dc.ifont;
3106 frcflags = FRC_ITALIC;
3107 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3108 if(base.fg == defaultfg)
3109 base.fg = defaultitalic;
3110 font = &dc.ibfont;
3111 frcflags = FRC_ITALICBOLD;
3112 } else if(base.mode & ATTR_UNDERLINE) {
3113 if(base.fg == defaultfg)
3114 base.fg = defaultunderline;
3115 }
3116
3117 if(IS_TRUECOL(base.fg)) {
3118 colfg.alpha = 0xffff;
3119 colfg.red = TRUERED(base.fg);
3120 colfg.green = TRUEGREEN(base.fg);
3121 colfg.blue = TRUEBLUE(base.fg);
3122 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3123 fg = &truefg;
3124 } else {
3125 fg = &dc.col[base.fg];
3126 }
3127
3128 if(IS_TRUECOL(base.bg)) {
3129 colbg.alpha = 0xffff;
3130 colbg.green = TRUEGREEN(base.bg);
3131 colbg.red = TRUERED(base.bg);
3132 colbg.blue = TRUEBLUE(base.bg);
3133 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3134 bg = &truebg;
3135 } else {
3136 bg = &dc.col[base.bg];
3137 }
3138
3139 if(base.mode & ATTR_BOLD) {
3140 if(BETWEEN(base.fg, 0, 7)) {
3141 /* basic system colors */
3142 fg = &dc.col[base.fg + 8];
3143 } else if(BETWEEN(base.fg, 16, 195)) {
3144 /* 256 colors */
3145 fg = &dc.col[base.fg + 36];
3146 } else if(BETWEEN(base.fg, 232, 251)) {
3147 /* greyscale */
3148 fg = &dc.col[base.fg + 4];
3149 }
3150 /*
3151 * Those ranges will not be brightened:
3152 * 8 - 15 – bright system colors
3153 * 196 - 231 – highest 256 color cube
3154 * 252 - 255 – brightest colors in greyscale
3155 */
3156 font = &dc.bfont;
3157 frcflags = FRC_BOLD;
3158 }
3159
3160 if(IS_SET(MODE_REVERSE)) {
3161 if(fg == &dc.col[defaultfg]) {
3162 fg = &dc.col[defaultbg];
3163 } else {
3164 colfg.red = ~fg->color.red;
3165 colfg.green = ~fg->color.green;
3166 colfg.blue = ~fg->color.blue;
3167 colfg.alpha = fg->color.alpha;
3168 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3169 &revfg);
3170 fg = &revfg;
3171 }
3172
3173 if(bg == &dc.col[defaultbg]) {
3174 bg = &dc.col[defaultfg];
3175 } else {
3176 colbg.red = ~bg->color.red;
3177 colbg.green = ~bg->color.green;
3178 colbg.blue = ~bg->color.blue;
3179 colbg.alpha = bg->color.alpha;
3180 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3181 &revbg);
3182 bg = &revbg;
3183 }
3184 }
3185
3186 if(base.mode & ATTR_REVERSE) {
3187 temp = fg;
3188 fg = bg;
3189 bg = temp;
3190 }
3191
3192 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3193 fg = bg;
3194
3195 /* Intelligent cleaning up of the borders. */
3196 if(x == 0) {
3197 xclear(0, (y == 0)? 0 : winy, borderpx,
3198 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3199 }
3200 if(x + charlen >= term.col) {
3201 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3202 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3203 }
3204 if(y == 0)
3205 xclear(winx, 0, winx + width, borderpx);
3206 if(y == term.row-1)
3207 xclear(winx, winy + xw.ch, winx + width, xw.h);
3208
3209 /* Clean up the region we want to draw to. */
3210 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3211
3212 /* Set the clip region because Xft is sometimes dirty. */
3213 r.x = 0;
3214 r.y = 0;
3215 r.height = xw.ch;
3216 r.width = width;
3217 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3218
3219 for(xp = winx; bytelen > 0;) {
3220 /*
3221 * Search for the range in the to be printed string of glyphs
3222 * that are in the main font. Then print that range. If
3223 * some glyph is found that is not in the font, do the
3224 * fallback dance.
3225 */
3226 u8fs = s;
3227 u8fblen = 0;
3228 u8fl = 0;
3229 oneatatime = font->width != xw.cw;
3230 for(;;) {
3231 u8c = s;
3232 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3233 s += u8cblen;
3234 bytelen -= u8cblen;
3235
3236 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3237 if(oneatatime || !doesexist || bytelen <= 0) {
3238 if(oneatatime || bytelen <= 0) {
3239 if(doesexist) {
3240 u8fl++;
3241 u8fblen += u8cblen;
3242 }
3243 }
3244
3245 if(u8fl > 0) {
3246 XftDrawStringUtf8(xw.draw, fg,
3247 font->match, xp,
3248 winy + font->ascent,
3249 (FcChar8 *)u8fs,
3250 u8fblen);
3251 xp += xw.cw * u8fl;
3252
3253 }
3254 break;
3255 }
3256
3257 u8fl++;
3258 u8fblen += u8cblen;
3259 }
3260 if(doesexist) {
3261 if(oneatatime)
3262 continue;
3263 break;
3264 }
3265
3266 /* Search the font cache. */
3267 for(i = 0; i < frclen; i++) {
3268 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3269 && frc[i].flags == frcflags) {
3270 break;
3271 }
3272 }
3273
3274 /* Nothing was found. */
3275 if(i >= frclen) {
3276 if(!font->set)
3277 xloadfontset(font);
3278 fcsets[0] = font->set;
3279
3280 /*
3281 * Nothing was found in the cache. Now use
3282 * some dozen of Fontconfig calls to get the
3283 * font for one single character.
3284 *
3285 * Xft and fontconfig are design failures.
3286 */
3287 fcpattern = FcPatternDuplicate(font->pattern);
3288 fccharset = FcCharSetCreate();
3289
3290 FcCharSetAddChar(fccharset, unicodep);
3291 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3292 fccharset);
3293 FcPatternAddBool(fcpattern, FC_SCALABLE,
3294 FcTrue);
3295
3296 FcConfigSubstitute(0, fcpattern,
3297 FcMatchPattern);
3298 FcDefaultSubstitute(fcpattern);
3299
3300 fontpattern = FcFontSetMatch(0, fcsets,
3301 FcTrue, fcpattern, &fcres);
3302
3303 /*
3304 * Overwrite or create the new cache entry.
3305 */
3306 if(frclen >= LEN(frc)) {
3307 frclen = LEN(frc) - 1;
3308 XftFontClose(xw.dpy, frc[frclen].font);
3309 }
3310
3311 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3312 fontpattern);
3313 frc[frclen].flags = frcflags;
3314
3315 i = frclen;
3316 frclen++;
3317
3318 FcPatternDestroy(fcpattern);
3319 FcCharSetDestroy(fccharset);
3320 }
3321
3322 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3323 xp, winy + frc[i].font->ascent,
3324 (FcChar8 *)u8c, u8cblen);
3325
3326 xp += xw.cw * wcwidth(unicodep);
3327 }
3328
3329 /*
3330 * This is how the loop above actually should be. Why does the
3331 * application have to care about font details?
3332 *
3333 * I have to repeat: Xft and Fontconfig are design failures.
3334 */
3335 /*
3336 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3337 winy + font->ascent, (FcChar8 *)s, bytelen);
3338 */
3339
3340 if(base.mode & ATTR_UNDERLINE) {
3341 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3342 width, 1);
3343 }
3344
3345 /* Reset clip to none. */
3346 XftDrawSetClip(xw.draw, 0);
3347 }
3348
3349 void
3350 xdrawcursor(void) {
3351 static int oldx = 0, oldy = 0;
3352 int sl, width, curx;
3353 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3354
3355 LIMIT(oldx, 0, term.col-1);
3356 LIMIT(oldy, 0, term.row-1);
3357
3358 curx = term.c.x;
3359
3360 /* adjust position if in dummy */
3361 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3362 oldx--;
3363 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3364 curx--;
3365
3366 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3367
3368 /* remove the old cursor */
3369 sl = utf8len(term.line[oldy][oldx].c);
3370 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3371 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3372 oldy, width, sl);
3373
3374 /* draw the new one */
3375 if(!(IS_SET(MODE_HIDE))) {
3376 if(xw.state & WIN_FOCUSED) {
3377 if(IS_SET(MODE_REVERSE)) {
3378 g.mode |= ATTR_REVERSE;
3379 g.fg = defaultcs;
3380 g.bg = defaultfg;
3381 }
3382
3383 sl = utf8len(g.c);
3384 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3385 ? 2 : 1;
3386 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3387 } else {
3388 XftDrawRect(xw.draw, &dc.col[defaultcs],
3389 borderpx + curx * xw.cw,
3390 borderpx + term.c.y * xw.ch,
3391 xw.cw - 1, 1);
3392 XftDrawRect(xw.draw, &dc.col[defaultcs],
3393 borderpx + curx * xw.cw,
3394 borderpx + term.c.y * xw.ch,
3395 1, xw.ch - 1);
3396 XftDrawRect(xw.draw, &dc.col[defaultcs],
3397 borderpx + (curx + 1) * xw.cw - 1,
3398 borderpx + term.c.y * xw.ch,
3399 1, xw.ch - 1);
3400 XftDrawRect(xw.draw, &dc.col[defaultcs],
3401 borderpx + curx * xw.cw,
3402 borderpx + (term.c.y + 1) * xw.ch - 1,
3403 xw.cw, 1);
3404 }
3405 oldx = curx, oldy = term.c.y;
3406 }
3407 }
3408
3409
3410 void
3411 xsettitle(char *p) {
3412 XTextProperty prop;
3413
3414 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3415 &prop);
3416 XSetWMName(xw.dpy, xw.win, &prop);
3417 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3418 XFree(prop.value);
3419 }
3420
3421 void
3422 xresettitle(void) {
3423 xsettitle(opt_title ? opt_title : "st");
3424 }
3425
3426 void
3427 redraw(int timeout) {
3428 struct timespec tv = {0, timeout * 1000};
3429
3430 draw();
3431
3432 if(timeout > 0) {
3433 nanosleep(&tv, NULL);
3434 XSync(xw.dpy, False); /* necessary for a good tput flash */
3435 }
3436 }
3437
3438 void
3439 draw(void) {
3440 drawregion(0, 0, term.col, term.row);
3441 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3442 xw.h, 0, 0);
3443 XSetForeground(xw.dpy, dc.gc,
3444 dc.col[IS_SET(MODE_REVERSE)?
3445 defaultfg : defaultbg].pixel);
3446 }
3447
3448 void
3449 drawregion(int x1, int y1, int x2, int y2) {
3450 int ic, ib, x, y, ox, sl;
3451 Glyph base, new;
3452 char buf[DRAW_BUF_SIZ];
3453 bool ena_sel = sel.ob.x != -1;
3454 long unicodep;
3455
3456 if(sel.alt != IS_SET(MODE_ALTSCREEN))
3457 ena_sel = 0;
3458
3459 if(!(xw.state & WIN_VISIBLE))
3460 return;
3461
3462 for(y = y1; y < y2; y++) {
3463 if(!term.dirty[y])
3464 continue;
3465
3466 xtermclear(0, y, term.col, y);
3467 term.dirty[y] = 0;
3468 base = term.line[y][0];
3469 ic = ib = ox = 0;
3470 for(x = x1; x < x2; x++) {
3471 new = term.line[y][x];
3472 if(new.mode == ATTR_WDUMMY)
3473 continue;
3474 if(ena_sel && selected(x, y))
3475 new.mode ^= ATTR_REVERSE;
3476 if(ib > 0 && (ATTRCMP(base, new)
3477 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3478 xdraws(buf, base, ox, y, ic, ib);
3479 ic = ib = 0;
3480 }
3481 if(ib == 0) {
3482 ox = x;
3483 base = new;
3484 }
3485
3486 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3487 memcpy(buf+ib, new.c, sl);
3488 ib += sl;
3489 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3490 }
3491 if(ib > 0)
3492 xdraws(buf, base, ox, y, ic, ib);
3493 }
3494 xdrawcursor();
3495 }
3496
3497 void
3498 expose(XEvent *ev) {
3499 XExposeEvent *e = &ev->xexpose;
3500
3501 if(xw.state & WIN_REDRAW) {
3502 if(!e->count)
3503 xw.state &= ~WIN_REDRAW;
3504 }
3505 redraw(0);
3506 }
3507
3508 void
3509 visibility(XEvent *ev) {
3510 XVisibilityEvent *e = &ev->xvisibility;
3511
3512 if(e->state == VisibilityFullyObscured) {
3513 xw.state &= ~WIN_VISIBLE;
3514 } else if(!(xw.state & WIN_VISIBLE)) {
3515 /* need a full redraw for next Expose, not just a buf copy */
3516 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3517 }
3518 }
3519
3520 void
3521 unmap(XEvent *ev) {
3522 xw.state &= ~WIN_VISIBLE;
3523 }
3524
3525 void
3526 xsetpointermotion(int set) {
3527 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3528 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3529 }
3530
3531 void
3532 xseturgency(int add) {
3533 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3534
3535 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3536 XSetWMHints(xw.dpy, xw.win, h);
3537 XFree(h);
3538 }
3539
3540 void
3541 focus(XEvent *ev) {
3542 XFocusChangeEvent *e = &ev->xfocus;
3543
3544 if(e->mode == NotifyGrab)
3545 return;
3546
3547 if(ev->type == FocusIn) {
3548 XSetICFocus(xw.xic);
3549 xw.state |= WIN_FOCUSED;
3550 xseturgency(0);
3551 if(IS_SET(MODE_FOCUS))
3552 ttywrite("\033[I", 3);
3553 } else {
3554 XUnsetICFocus(xw.xic);
3555 xw.state &= ~WIN_FOCUSED;
3556 if(IS_SET(MODE_FOCUS))
3557 ttywrite("\033[O", 3);
3558 }
3559 }
3560
3561 static inline bool
3562 match(uint mask, uint state) {
3563 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3564 }
3565
3566 void
3567 numlock(const Arg *dummy) {
3568 term.numlock ^= 1;
3569 }
3570
3571 char*
3572 kmap(KeySym k, uint state) {
3573 Key *kp;
3574 int i;
3575
3576 /* Check for mapped keys out of X11 function keys. */
3577 for(i = 0; i < LEN(mappedkeys); i++) {
3578 if(mappedkeys[i] == k)
3579 break;
3580 }
3581 if(i == LEN(mappedkeys)) {
3582 if((k & 0xFFFF) < 0xFD00)
3583 return NULL;
3584 }
3585
3586 for(kp = key; kp < key + LEN(key); kp++) {
3587 if(kp->k != k)
3588 continue;
3589
3590 if(!match(kp->mask, state))
3591 continue;
3592
3593 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3594 continue;
3595 if(term.numlock && kp->appkey == 2)
3596 continue;
3597
3598 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3599 continue;
3600
3601 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3602 continue;
3603
3604 return kp->s;
3605 }
3606
3607 return NULL;
3608 }
3609
3610 void
3611 kpress(XEvent *ev) {
3612 XKeyEvent *e = &ev->xkey;
3613 KeySym ksym;
3614 char buf[32], *customkey;
3615 int len;
3616 long c;
3617 Status status;
3618 Shortcut *bp;
3619
3620 if(IS_SET(MODE_KBDLOCK))
3621 return;
3622
3623 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3624 /* 1. shortcuts */
3625 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3626 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3627 bp->func(&(bp->arg));
3628 return;
3629 }
3630 }
3631
3632 /* 2. custom keys from config.h */
3633 if((customkey = kmap(ksym, e->state))) {
3634 ttysend(customkey, strlen(customkey));
3635 return;
3636 }
3637
3638 /* 3. composed string from input method */
3639 if(len == 0)
3640 return;
3641 if(len == 1 && e->state & Mod1Mask) {
3642 if(IS_SET(MODE_8BIT)) {
3643 if(*buf < 0177) {
3644 c = *buf | 0x80;
3645 len = utf8encode(c, buf, UTF_SIZ);
3646 }
3647 } else {
3648 buf[1] = buf[0];
3649 buf[0] = '\033';
3650 len = 2;
3651 }
3652 }
3653 ttysend(buf, len);
3654 }
3655
3656
3657 void
3658 cmessage(XEvent *e) {
3659 /*
3660 * See xembed specs
3661 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3662 */
3663 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3664 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3665 xw.state |= WIN_FOCUSED;
3666 xseturgency(0);
3667 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3668 xw.state &= ~WIN_FOCUSED;
3669 }
3670 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3671 /* Send SIGHUP to shell */
3672 kill(pid, SIGHUP);
3673 exit(EXIT_SUCCESS);
3674 }
3675 }
3676
3677 void
3678 cresize(int width, int height) {
3679 int col, row;
3680
3681 if(width != 0)
3682 xw.w = width;
3683 if(height != 0)
3684 xw.h = height;
3685
3686 col = (xw.w - 2 * borderpx) / xw.cw;
3687 row = (xw.h - 2 * borderpx) / xw.ch;
3688
3689 tresize(col, row);
3690 xresize(col, row);
3691 ttyresize();
3692 }
3693
3694 void
3695 resize(XEvent *e) {
3696 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3697 return;
3698
3699 cresize(e->xconfigure.width, e->xconfigure.height);
3700 }
3701
3702 void
3703 run(void) {
3704 XEvent ev;
3705 int w = xw.w, h = xw.h;
3706 fd_set rfd;
3707 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3708 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3709
3710 /* Waiting for window mapping */
3711 while(1) {
3712 XNextEvent(xw.dpy, &ev);
3713 if(ev.type == ConfigureNotify) {
3714 w = ev.xconfigure.width;
3715 h = ev.xconfigure.height;
3716 } else if(ev.type == MapNotify) {
3717 break;
3718 }
3719 }
3720
3721 ttynew();
3722 cresize(w, h);
3723
3724 gettimeofday(&last, NULL);
3725 lastblink = last;
3726
3727 for(xev = actionfps;;) {
3728 long deltatime;
3729
3730 FD_ZERO(&rfd);
3731 FD_SET(cmdfd, &rfd);
3732 FD_SET(xfd, &rfd);
3733
3734 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3735 if(errno == EINTR)
3736 continue;
3737 die("select failed: %s\n", strerror(errno));
3738 }
3739 if(FD_ISSET(cmdfd, &rfd)) {
3740 ttyread();
3741 if(blinktimeout) {
3742 blinkset = tattrset(ATTR_BLINK);
3743 if(!blinkset)
3744 MODBIT(term.mode, 0, MODE_BLINK);
3745 }
3746 }
3747
3748 if(FD_ISSET(xfd, &rfd))
3749 xev = actionfps;
3750
3751 gettimeofday(&now, NULL);
3752 drawtimeout.tv_sec = 0;
3753 drawtimeout.tv_usec = (1000/xfps) * 1000;
3754 tv = &drawtimeout;
3755
3756 dodraw = 0;
3757 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3758 tsetdirtattr(ATTR_BLINK);
3759 term.mode ^= MODE_BLINK;
3760 lastblink = now;
3761 dodraw = 1;
3762 }
3763 deltatime = TIMEDIFF(now, last);
3764 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3765 || deltatime < 0) {
3766 dodraw = 1;
3767 last = now;
3768 }
3769
3770 if(dodraw) {
3771 while(XPending(xw.dpy)) {
3772 XNextEvent(xw.dpy, &ev);
3773 if(XFilterEvent(&ev, None))
3774 continue;
3775 if(handler[ev.type])
3776 (handler[ev.type])(&ev);
3777 }
3778
3779 draw();
3780 XFlush(xw.dpy);
3781
3782 if(xev && !FD_ISSET(xfd, &rfd))
3783 xev--;
3784 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3785 if(blinkset) {
3786 if(TIMEDIFF(now, lastblink) \
3787 > blinktimeout) {
3788 drawtimeout.tv_usec = 1;
3789 } else {
3790 drawtimeout.tv_usec = (1000 * \
3791 (blinktimeout - \
3792 TIMEDIFF(now,
3793 lastblink)));
3794 }
3795 } else {
3796 tv = NULL;
3797 }
3798 }
3799 }
3800 }
3801 }
3802
3803 void
3804 usage(void) {
3805 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3806 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3807 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3808 }
3809
3810 int
3811 main(int argc, char *argv[]) {
3812 char *titles;
3813 uint cols = 80, rows = 24;
3814
3815 xw.l = xw.t = 0;
3816 xw.isfixed = False;
3817
3818 ARGBEGIN {
3819 case 'a':
3820 allowaltscreen = false;
3821 break;
3822 case 'c':
3823 opt_class = EARGF(usage());
3824 break;
3825 case 'e':
3826 /* eat all remaining arguments */
3827 if(argc > 1) {
3828 opt_cmd = &argv[1];
3829 if(argv[1] != NULL && opt_title == NULL) {
3830 titles = xstrdup(argv[1]);
3831 opt_title = basename(titles);
3832 }
3833 }
3834 goto run;
3835 case 'f':
3836 opt_font = EARGF(usage());
3837 break;
3838 case 'g':
3839 xw.gm = XParseGeometry(EARGF(usage()),
3840 &xw.l, &xw.t, &cols, &rows);
3841 break;
3842 case 'i':
3843 xw.isfixed = True;
3844 break;
3845 case 'o':
3846 opt_io = EARGF(usage());
3847 break;
3848 case 't':
3849 opt_title = EARGF(usage());
3850 break;
3851 case 'w':
3852 opt_embed = EARGF(usage());
3853 break;
3854 case 'v':
3855 default:
3856 usage();
3857 } ARGEND;
3858
3859 run:
3860 setlocale(LC_CTYPE, "");
3861 XSetLocaleModifiers("");
3862 tnew(cols? cols : 1, rows? rows : 1);
3863 xinit();
3864 selinit();
3865 run();
3866
3867 return 0;
3868 }
3869