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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, /* DCS, OSC, PM, APC */
153 ESC_ALTCHARSET = 8,
154 ESC_STR_END = 16, /* a final string was encountered */
155 ESC_TEST = 32, /* Enter in test mode */
156 };
157
158 enum window_state {
159 WIN_VISIBLE = 1,
160 WIN_REDRAW = 2,
161 WIN_FOCUSED = 4
162 };
163
164 enum selection_type {
165 SEL_REGULAR = 1,
166 SEL_RECTANGULAR = 2
167 };
168
169 enum selection_snap {
170 SNAP_WORD = 1,
171 SNAP_LINE = 2
172 };
173
174 typedef unsigned char uchar;
175 typedef unsigned int uint;
176 typedef unsigned long ulong;
177 typedef unsigned short ushort;
178
179 typedef XftDraw *Draw;
180 typedef XftColor Colour;
181 typedef Colormap Colourmap;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode;
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colourmap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int l, t; /* left and top offset */
254 int gm; /* geometry mask */
255 int tw, th; /* tty width and height */
256 int w, h; /* window width and height */
257 int ch; /* char height */
258 int cw; /* char width */
259 char state; /* focus, redraw, visible */
260 } XWindow;
261
262 typedef struct {
263 uint b;
264 uint mask;
265 char *s;
266 } Mousekey;
267
268 typedef struct {
269 KeySym k;
270 uint mask;
271 char *s;
272 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
273 signed char appkey; /* application keypad */
274 signed char appcursor; /* application cursor */
275 signed char crlf; /* crlf mode */
276 } Key;
277
278 typedef struct {
279 int mode;
280 int type;
281 int snap;
282 /*
283 * Selection variables:
284 * nb – normalized coordinates of the beginning of the selection
285 * ne – normalized coordinates of the end of the selection
286 * ob – original coordinates of the beginning of the selection
287 * oe – original coordinates of the end of the selection
288 */
289 struct {
290 int x, y;
291 } nb, ne, ob, oe;
292
293 char *clip;
294 Atom xtarget;
295 bool alt;
296 struct timeval tclick1;
297 struct timeval tclick2;
298 } Selection;
299
300 typedef union {
301 int i;
302 uint ui;
303 float f;
304 const void *v;
305 } Arg;
306
307 typedef struct {
308 uint mod;
309 KeySym keysym;
310 void (*func)(const Arg *);
311 const Arg arg;
312 } Shortcut;
313
314 /* function definitions used in config.h */
315 static void clippaste(const Arg *);
316 static void numlock(const Arg *);
317 static void selpaste(const Arg *);
318 static void xzoom(const Arg *);
319 static void printsel(const Arg *);
320 static void printscreen(const Arg *) ;
321 static void toggleprinter(const Arg *);
322
323 /* Config.h for applying patches and the configuration. */
324 #include "config.h"
325
326 /* Font structure */
327 typedef struct {
328 int height;
329 int width;
330 int ascent;
331 int descent;
332 short lbearing;
333 short rbearing;
334 XftFont *match;
335 FcFontSet *set;
336 FcPattern *pattern;
337 } Font;
338
339 /* Drawing Context */
340 typedef struct {
341 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
342 Font font, bfont, ifont, ibfont;
343 GC gc;
344 } DC;
345
346 static void die(const char *, ...);
347 static void draw(void);
348 static void redraw(int);
349 static void drawregion(int, int, int, int);
350 static void execsh(void);
351 static void sigchld(int);
352 static void run(void);
353
354 static void csidump(void);
355 static void csihandle(void);
356 static void csiparse(void);
357 static void csireset(void);
358 static void strdump(void);
359 static void strhandle(void);
360 static void strparse(void);
361 static void strreset(void);
362
363 static int tattrset(int);
364 static void tprinter(char *, size_t);
365 static void tdumpsel(void);
366 static void tdumpline(int);
367 static void tdump(void);
368 static void tclearregion(int, int, int, int);
369 static void tcursor(int);
370 static void tdeletechar(int);
371 static void tdeleteline(int);
372 static void tinsertblank(int);
373 static void tinsertblankline(int);
374 static void tmoveto(int, int);
375 static void tmoveato(int, int);
376 static void tnew(int, int);
377 static void tnewline(int);
378 static void tputtab(int);
379 static void tputc(char *, int);
380 static void treset(void);
381 static int tresize(int, int);
382 static void tscrollup(int, int);
383 static void tscrolldown(int, int);
384 static void tsetattr(int *, int);
385 static void tsetchar(char *, Glyph *, int, int);
386 static void tsetscroll(int, int);
387 static void tswapscreen(void);
388 static void tsetdirt(int, int);
389 static void tsetdirtattr(int);
390 static void tsetmode(bool, bool, int *, int);
391 static void tfulldirt(void);
392 static void techo(char *, int);
393 static int32_t tdefcolor(int *, int *, int);
394 static void tselcs(void);
395 static void tdeftran(char);
396 static inline bool match(uint, uint);
397 static void ttynew(void);
398 static void ttyread(void);
399 static void ttyresize(void);
400 static void ttysend(char *, size_t);
401 static void ttywrite(const char *, size_t);
402
403 static void xdraws(char *, Glyph, int, int, int, int);
404 static void xhints(void);
405 static void xclear(int, int, int, int);
406 static void xdrawcursor(void);
407 static void xinit(void);
408 static void xloadcols(void);
409 static int xsetcolorname(int, const char *);
410 static int xgeommasktogravity(int);
411 static int xloadfont(Font *, FcPattern *);
412 static void xloadfonts(char *, double);
413 static int xloadfontset(Font *);
414 static void xsettitle(char *);
415 static void xresettitle(void);
416 static void xsetpointermotion(int);
417 static void xseturgency(int);
418 static void xsetsel(char *);
419 static void xtermclear(int, int, int, int);
420 static void xunloadfont(Font *);
421 static void xunloadfonts(void);
422 static void xresize(int, int);
423
424 static void expose(XEvent *);
425 static void visibility(XEvent *);
426 static void unmap(XEvent *);
427 static char *kmap(KeySym, uint);
428 static void kpress(XEvent *);
429 static void cmessage(XEvent *);
430 static void cresize(int, int);
431 static void resize(XEvent *);
432 static void focus(XEvent *);
433 static void brelease(XEvent *);
434 static void bpress(XEvent *);
435 static void bmotion(XEvent *);
436 static void selnotify(XEvent *);
437 static void selclear(XEvent *);
438 static void selrequest(XEvent *);
439
440 static void selinit(void);
441 static void selsort(void);
442 static inline bool selected(int, int);
443 static char *getsel(void);
444 static void selcopy(void);
445 static void selscroll(int, int);
446 static void selsnap(int, int *, int *, int);
447
448 static size_t utf8decode(char *, long *, size_t);
449 static long utf8decodebyte(char, size_t *);
450 static size_t utf8encode(long, char *, size_t);
451 static char utf8encodebyte(long, size_t);
452 static size_t utf8len(char *);
453 static size_t utf8validate(long *, size_t);
454
455 static ssize_t xwrite(int, const char *, size_t);
456 static void *xmalloc(size_t);
457 static void *xrealloc(void *, size_t);
458 static char *xstrdup(char *);
459
460 static void (*handler[LASTEvent])(XEvent *) = {
461 [KeyPress] = kpress,
462 [ClientMessage] = cmessage,
463 [ConfigureNotify] = resize,
464 [VisibilityNotify] = visibility,
465 [UnmapNotify] = unmap,
466 [Expose] = expose,
467 [FocusIn] = focus,
468 [FocusOut] = focus,
469 [MotionNotify] = bmotion,
470 [ButtonPress] = bpress,
471 [ButtonRelease] = brelease,
472 [SelectionClear] = selclear,
473 [SelectionNotify] = selnotify,
474 [SelectionRequest] = selrequest,
475 };
476
477 /* Globals */
478 static DC dc;
479 static XWindow xw;
480 static Term term;
481 static CSIEscape csiescseq;
482 static STREscape strescseq;
483 static int cmdfd;
484 static pid_t pid;
485 static Selection sel;
486 static int iofd = STDOUT_FILENO;
487 static char **opt_cmd = NULL;
488 static char *opt_io = NULL;
489 static char *opt_title = NULL;
490 static char *opt_embed = NULL;
491 static char *opt_class = NULL;
492 static char *opt_font = NULL;
493 static int oldbutton = 3; /* button event on startup: 3 = release */
494
495 static char *usedfont = NULL;
496 static double usedfontsize = 0;
497
498 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
499 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
500 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
501 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
502
503 /* Font Ring Cache */
504 enum {
505 FRC_NORMAL,
506 FRC_ITALIC,
507 FRC_BOLD,
508 FRC_ITALICBOLD
509 };
510
511 typedef struct {
512 XftFont *font;
513 int flags;
514 } Fontcache;
515
516 /* Fontcache is an array now. A new font will be appended to the array. */
517 static Fontcache frc[16];
518 static int frclen = 0;
519
520 ssize_t
521 xwrite(int fd, const char *s, size_t len) {
522 size_t aux = len;
523
524 while(len > 0) {
525 ssize_t r = write(fd, s, len);
526 if(r < 0)
527 return r;
528 len -= r;
529 s += r;
530 }
531 return aux;
532 }
533
534 void *
535 xmalloc(size_t len) {
536 void *p = malloc(len);
537
538 if(!p)
539 die("Out of memory\n");
540
541 return p;
542 }
543
544 void *
545 xrealloc(void *p, size_t len) {
546 if((p = realloc(p, len)) == NULL)
547 die("Out of memory\n");
548
549 return p;
550 }
551
552 char *
553 xstrdup(char *s) {
554 if((s = strdup(s)) == NULL)
555 die("Out of memory\n");
556
557 return s;
558 }
559
560 size_t
561 utf8decode(char *c, long *u, size_t clen) {
562 size_t i, j, len, type;
563 long udecoded;
564
565 *u = UTF_INVALID;
566 if(!clen)
567 return 0;
568 udecoded = utf8decodebyte(c[0], &len);
569 if(!BETWEEN(len, 1, UTF_SIZ))
570 return 1;
571 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
572 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
573 if(type != 0)
574 return j;
575 }
576 if(j < len)
577 return 0;
578 *u = udecoded;
579 utf8validate(u, len);
580 return len;
581 }
582
583 long
584 utf8decodebyte(char c, size_t *i) {
585 for(*i = 0; *i < LEN(utfmask); ++(*i))
586 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
587 return (uchar)c & ~utfmask[*i];
588 return 0;
589 }
590
591 size_t
592 utf8encode(long u, char *c, size_t clen) {
593 size_t len, i;
594
595 len = utf8validate(&u, 0);
596 if(clen < len)
597 return 0;
598 for(i = len - 1; i != 0; --i) {
599 c[i] = utf8encodebyte(u, 0);
600 u >>= 6;
601 }
602 c[0] = utf8encodebyte(u, len);
603 return len;
604 }
605
606 char
607 utf8encodebyte(long u, size_t i) {
608 return utfbyte[i] | (u & ~utfmask[i]);
609 }
610
611 size_t
612 utf8len(char *c) {
613 return utf8decode(c, &(long){0}, UTF_SIZ);
614 }
615
616 size_t
617 utf8validate(long *u, size_t i) {
618 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
619 *u = UTF_INVALID;
620 for(i = 1; *u > utfmax[i]; ++i)
621 ;
622 return i;
623 }
624
625 static void
626 selinit(void) {
627 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
628 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
629 sel.mode = 0;
630 sel.ob.x = -1;
631 sel.clip = NULL;
632 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
633 if(sel.xtarget == None)
634 sel.xtarget = XA_STRING;
635 }
636
637 static int
638 x2col(int x) {
639 x -= borderpx;
640 x /= xw.cw;
641
642 return LIMIT(x, 0, term.col-1);
643 }
644
645 static int
646 y2row(int y) {
647 y -= borderpx;
648 y /= xw.ch;
649
650 return LIMIT(y, 0, term.row-1);
651 }
652
653 static void
654 selsort(void) {
655 if(sel.ob.y == sel.oe.y) {
656 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
657 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
658 } else {
659 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
660 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
661 }
662 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
663 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
664 }
665
666 static inline bool
667 selected(int x, int y) {
668 if(sel.ne.y == y && sel.nb.y == y)
669 return BETWEEN(x, sel.nb.x, sel.ne.x);
670
671 if(sel.type == SEL_RECTANGULAR) {
672 return ((sel.nb.y <= y && y <= sel.ne.y)
673 && (sel.nb.x <= x && x <= sel.ne.x));
674 }
675
676 return ((sel.nb.y < y && y < sel.ne.y)
677 || (y == sel.ne.y && x <= sel.ne.x))
678 || (y == sel.nb.y && x >= sel.nb.x
679 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
680 }
681
682 void
683 selsnap(int mode, int *x, int *y, int direction) {
684 int i;
685
686 switch(mode) {
687 case SNAP_WORD:
688 /*
689 * Snap around if the word wraps around at the end or
690 * beginning of a line.
691 */
692 for(;;) {
693 if(direction < 0 && *x <= 0) {
694 if(*y > 0 && term.line[*y - 1][term.col-1].mode
695 & ATTR_WRAP) {
696 *y -= 1;
697 *x = term.col-1;
698 } else {
699 break;
700 }
701 }
702 if(direction > 0 && *x >= term.col-1) {
703 if(*y < term.row-1 && term.line[*y][*x].mode
704 & ATTR_WRAP) {
705 *y += 1;
706 *x = 0;
707 } else {
708 break;
709 }
710 }
711
712 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
713 *x += direction;
714 continue;
715 }
716
717 if(strchr(worddelimiters,
718 term.line[*y][*x+direction].c[0])) {
719 break;
720 }
721
722 *x += direction;
723 }
724 break;
725 case SNAP_LINE:
726 /*
727 * Snap around if the the previous line or the current one
728 * has set ATTR_WRAP at its end. Then the whole next or
729 * previous line will be selected.
730 */
731 *x = (direction < 0) ? 0 : term.col - 1;
732 if(direction < 0 && *y > 0) {
733 for(; *y > 0; *y += direction) {
734 if(!(term.line[*y-1][term.col-1].mode
735 & ATTR_WRAP)) {
736 break;
737 }
738 }
739 } else if(direction > 0 && *y < term.row-1) {
740 for(; *y < term.row; *y += direction) {
741 if(!(term.line[*y][term.col-1].mode
742 & ATTR_WRAP)) {
743 break;
744 }
745 }
746 }
747 break;
748 default:
749 /*
750 * Select the whole line when the end of line is reached.
751 */
752 if(direction > 0) {
753 i = term.col;
754 while(--i > 0 && term.line[*y][i].c[0] == ' ')
755 /* nothing */;
756 if(i > 0 && i < *x)
757 *x = term.col - 1;
758 }
759 break;
760 }
761 }
762
763 void
764 getbuttoninfo(XEvent *e) {
765 int type;
766 uint state = e->xbutton.state &~Button1Mask;
767
768 sel.alt = IS_SET(MODE_ALTSCREEN);
769
770 sel.oe.x = x2col(e->xbutton.x);
771 sel.oe.y = y2row(e->xbutton.y);
772
773 if(sel.ob.y < sel.oe.y
774 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
775 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
776 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
777 } else {
778 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
779 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
780 }
781 selsort();
782
783 sel.type = SEL_REGULAR;
784 for(type = 1; type < LEN(selmasks); ++type) {
785 if(match(selmasks[type], state)) {
786 sel.type = type;
787 break;
788 }
789 }
790 }
791
792 void
793 mousereport(XEvent *e) {
794 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
795 button = e->xbutton.button, state = e->xbutton.state,
796 len;
797 char buf[40];
798 static int ox, oy;
799
800 /* from urxvt */
801 if(e->xbutton.type == MotionNotify) {
802 if(x == ox && y == oy)
803 return;
804 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
805 return;
806 /* MOUSE_MOTION: no reporting if no button is pressed */
807 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
808 return;
809
810 button = oldbutton + 32;
811 ox = x;
812 oy = y;
813 } else {
814 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
815 button = 3;
816 } else {
817 button -= Button1;
818 if(button >= 3)
819 button += 64 - 3;
820 }
821 if(e->xbutton.type == ButtonPress) {
822 oldbutton = button;
823 ox = x;
824 oy = y;
825 } else if(e->xbutton.type == ButtonRelease) {
826 oldbutton = 3;
827 /* MODE_MOUSEX10: no button release reporting */
828 if(IS_SET(MODE_MOUSEX10))
829 return;
830 }
831 }
832
833 if(!IS_SET(MODE_MOUSEX10)) {
834 button += (state & ShiftMask ? 4 : 0)
835 + (state & Mod4Mask ? 8 : 0)
836 + (state & ControlMask ? 16 : 0);
837 }
838
839 len = 0;
840 if(IS_SET(MODE_MOUSESGR)) {
841 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
842 button, x+1, y+1,
843 e->xbutton.type == ButtonRelease ? 'm' : 'M');
844 } else if(x < 223 && y < 223) {
845 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
846 32+button, 32+x+1, 32+y+1);
847 } else {
848 return;
849 }
850
851 ttywrite(buf, len);
852 }
853
854 void
855 bpress(XEvent *e) {
856 struct timeval now;
857 Mousekey *mk;
858
859 if(IS_SET(MODE_MOUSE)) {
860 mousereport(e);
861 return;
862 }
863
864 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
865 if(e->xbutton.button == mk->b
866 && match(mk->mask, e->xbutton.state)) {
867 ttysend(mk->s, strlen(mk->s));
868 return;
869 }
870 }
871
872 if(e->xbutton.button == Button1) {
873 gettimeofday(&now, NULL);
874
875 /* Clear previous selection, logically and visually. */
876 selclear(NULL);
877 sel.mode = 1;
878 sel.type = SEL_REGULAR;
879 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
880 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
881
882 /*
883 * If the user clicks below predefined timeouts specific
884 * snapping behaviour is exposed.
885 */
886 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
887 sel.snap = SNAP_LINE;
888 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
889 sel.snap = SNAP_WORD;
890 } else {
891 sel.snap = 0;
892 }
893 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
894 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
895 selsort();
896
897 /*
898 * Draw selection, unless it's regular and we don't want to
899 * make clicks visible
900 */
901 if(sel.snap != 0) {
902 sel.mode++;
903 tsetdirt(sel.nb.y, sel.ne.y);
904 }
905 sel.tclick2 = sel.tclick1;
906 sel.tclick1 = now;
907 }
908 }
909
910 char *
911 getsel(void) {
912 char *str, *ptr;
913 int x, y, bufsize, size, i, ex;
914 Glyph *gp, *last;
915
916 if(sel.ob.x == -1) {
917 str = NULL;
918 } else {
919 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
920 ptr = str = xmalloc(bufsize);
921
922 /* append every set & selected glyph to the selection */
923 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
924 gp = &term.line[y][0];
925 last = &gp[term.col-1];
926
927 while(last >= gp && !(selected(last - gp, y) &&
928 strcmp(last->c, " ") != 0)) {
929 --last;
930 }
931
932 for(x = 0; gp <= last; x++, ++gp) {
933 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
934 continue;
935
936 size = utf8len(gp->c);
937 memcpy(ptr, gp->c, size);
938 ptr += size;
939 }
940
941 /*
942 * Copy and pasting of line endings is inconsistent
943 * in the inconsistent terminal and GUI world.
944 * The best solution seems like to produce '\n' when
945 * something is copied from st and convert '\n' to
946 * '\r', when something to be pasted is received by
947 * st.
948 * FIXME: Fix the computer world.
949 */
950 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
951 *ptr++ = '\n';
952
953 /*
954 * If the last selected line expands in the selection
955 * after the visible text '\n' is appended.
956 */
957 if(y == sel.ne.y) {
958 i = term.col;
959 while(--i > 0 && term.line[y][i].c[0] == ' ')
960 /* nothing */;
961 ex = sel.ne.x;
962 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
963 ex = sel.nb.x;
964 if(i < ex)
965 *ptr++ = '\n';
966 }
967 }
968 *ptr = 0;
969 }
970 return str;
971 }
972
973 void
974 selcopy(void) {
975 xsetsel(getsel());
976 }
977
978 void
979 selnotify(XEvent *e) {
980 ulong nitems, ofs, rem;
981 int format;
982 uchar *data, *last, *repl;
983 Atom type;
984
985 ofs = 0;
986 do {
987 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
988 False, AnyPropertyType, &type, &format,
989 &nitems, &rem, &data)) {
990 fprintf(stderr, "Clipboard allocation failed\n");
991 return;
992 }
993
994 /*
995 * As seen in getsel:
996 * Line endings are inconsistent in the terminal and GUI world
997 * copy and pasting. When receiving some selection data,
998 * replace all '\n' with '\r'.
999 * FIXME: Fix the computer world.
1000 */
1001 repl = data;
1002 last = data + nitems * format / 8;
1003 while((repl = memchr(repl, '\n', last - repl))) {
1004 *repl++ = '\r';
1005 }
1006
1007 if(IS_SET(MODE_BRCKTPASTE))
1008 ttywrite("\033[200~", 6);
1009 ttysend((char *)data, nitems * format / 8);
1010 if(IS_SET(MODE_BRCKTPASTE))
1011 ttywrite("\033[201~", 6);
1012 XFree(data);
1013 /* number of 32-bit chunks returned */
1014 ofs += nitems * format / 32;
1015 } while(rem > 0);
1016 }
1017
1018 void
1019 selpaste(const Arg *dummy) {
1020 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1021 xw.win, CurrentTime);
1022 }
1023
1024 void
1025 clippaste(const Arg *dummy) {
1026 Atom clipboard;
1027
1028 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1029 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1030 xw.win, CurrentTime);
1031 }
1032
1033 void
1034 selclear(XEvent *e) {
1035 if(sel.ob.x == -1)
1036 return;
1037 sel.ob.x = -1;
1038 tsetdirt(sel.nb.y, sel.ne.y);
1039 }
1040
1041 void
1042 selrequest(XEvent *e) {
1043 XSelectionRequestEvent *xsre;
1044 XSelectionEvent xev;
1045 Atom xa_targets, string;
1046
1047 xsre = (XSelectionRequestEvent *) e;
1048 xev.type = SelectionNotify;
1049 xev.requestor = xsre->requestor;
1050 xev.selection = xsre->selection;
1051 xev.target = xsre->target;
1052 xev.time = xsre->time;
1053 /* reject */
1054 xev.property = None;
1055
1056 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1057 if(xsre->target == xa_targets) {
1058 /* respond with the supported type */
1059 string = sel.xtarget;
1060 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1061 XA_ATOM, 32, PropModeReplace,
1062 (uchar *) &string, 1);
1063 xev.property = xsre->property;
1064 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1065 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1066 xsre->target, 8, PropModeReplace,
1067 (uchar *) sel.clip, strlen(sel.clip));
1068 xev.property = xsre->property;
1069 }
1070
1071 /* all done, send a notification to the listener */
1072 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1073 fprintf(stderr, "Error sending SelectionNotify event\n");
1074 }
1075
1076 void
1077 xsetsel(char *str) {
1078 /* register the selection for both the clipboard and the primary */
1079 Atom clipboard;
1080
1081 free(sel.clip);
1082 sel.clip = str;
1083
1084 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1085
1086 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1087 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1088 }
1089
1090 void
1091 brelease(XEvent *e) {
1092 if(IS_SET(MODE_MOUSE)) {
1093 mousereport(e);
1094 return;
1095 }
1096
1097 if(e->xbutton.button == Button2) {
1098 selpaste(NULL);
1099 } else if(e->xbutton.button == Button1) {
1100 if(sel.mode < 2) {
1101 selclear(NULL);
1102 } else {
1103 getbuttoninfo(e);
1104 selcopy();
1105 }
1106 sel.mode = 0;
1107 tsetdirt(sel.nb.y, sel.ne.y);
1108 }
1109 }
1110
1111 void
1112 bmotion(XEvent *e) {
1113 int oldey, oldex, oldsby, oldsey;
1114
1115 if(IS_SET(MODE_MOUSE)) {
1116 mousereport(e);
1117 return;
1118 }
1119
1120 if(!sel.mode)
1121 return;
1122
1123 sel.mode++;
1124 oldey = sel.oe.y;
1125 oldex = sel.oe.x;
1126 oldsby = sel.nb.y;
1127 oldsey = sel.ne.y;
1128 getbuttoninfo(e);
1129
1130 if(oldey != sel.oe.y || oldex != sel.oe.x)
1131 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1132 }
1133
1134 void
1135 die(const char *errstr, ...) {
1136 va_list ap;
1137
1138 va_start(ap, errstr);
1139 vfprintf(stderr, errstr, ap);
1140 va_end(ap);
1141 exit(EXIT_FAILURE);
1142 }
1143
1144 void
1145 execsh(void) {
1146 char **args;
1147 char *envshell = getenv("SHELL");
1148 const struct passwd *pass = getpwuid(getuid());
1149 char buf[sizeof(long) * 8 + 1];
1150
1151 unsetenv("COLUMNS");
1152 unsetenv("LINES");
1153 unsetenv("TERMCAP");
1154
1155 if(pass) {
1156 setenv("LOGNAME", pass->pw_name, 1);
1157 setenv("USER", pass->pw_name, 1);
1158 setenv("SHELL", pass->pw_shell, 0);
1159 setenv("HOME", pass->pw_dir, 0);
1160 }
1161
1162 snprintf(buf, sizeof(buf), "%lu", xw.win);
1163 setenv("WINDOWID", buf, 1);
1164
1165 signal(SIGCHLD, SIG_DFL);
1166 signal(SIGHUP, SIG_DFL);
1167 signal(SIGINT, SIG_DFL);
1168 signal(SIGQUIT, SIG_DFL);
1169 signal(SIGTERM, SIG_DFL);
1170 signal(SIGALRM, SIG_DFL);
1171
1172 DEFAULT(envshell, shell);
1173 setenv("TERM", termname, 1);
1174 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1175 execvp(args[0], args);
1176 exit(EXIT_FAILURE);
1177 }
1178
1179 void
1180 sigchld(int a) {
1181 int stat = 0;
1182
1183 if(waitpid(pid, &stat, 0) < 0)
1184 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1185
1186 if(WIFEXITED(stat)) {
1187 exit(WEXITSTATUS(stat));
1188 } else {
1189 exit(EXIT_FAILURE);
1190 }
1191 }
1192
1193 void
1194 ttynew(void) {
1195 int m, s;
1196 struct winsize w = {term.row, term.col, 0, 0};
1197
1198 /* seems to work fine on linux, openbsd and freebsd */
1199 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1200 die("openpty failed: %s\n", strerror(errno));
1201
1202 switch(pid = fork()) {
1203 case -1:
1204 die("fork failed\n");
1205 break;
1206 case 0:
1207 setsid(); /* create a new process group */
1208 dup2(s, STDIN_FILENO);
1209 dup2(s, STDOUT_FILENO);
1210 dup2(s, STDERR_FILENO);
1211 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1212 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1213 close(s);
1214 close(m);
1215 execsh();
1216 break;
1217 default:
1218 close(s);
1219 cmdfd = m;
1220 signal(SIGCHLD, sigchld);
1221 if(opt_io) {
1222 term.mode |= MODE_PRINT;
1223 iofd = (!strcmp(opt_io, "-")) ?
1224 STDOUT_FILENO :
1225 open(opt_io, O_WRONLY | O_CREAT, 0666);
1226 if(iofd < 0) {
1227 fprintf(stderr, "Error opening %s:%s\n",
1228 opt_io, strerror(errno));
1229 }
1230 }
1231 break;
1232 }
1233 }
1234
1235 void
1236 dump(char c) {
1237 static int col;
1238
1239 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1240 if(++col % 10 == 0)
1241 fprintf(stderr, "\n");
1242 }
1243
1244 void
1245 ttyread(void) {
1246 static char buf[BUFSIZ];
1247 static int buflen = 0;
1248 char *ptr;
1249 char s[UTF_SIZ];
1250 int charsize; /* size of utf8 char in bytes */
1251 long unicodep;
1252 int ret;
1253
1254 /* append read bytes to unprocessed bytes */
1255 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1256 die("Couldn't read from shell: %s\n", strerror(errno));
1257
1258 /* process every complete utf8 char */
1259 buflen += ret;
1260 ptr = buf;
1261 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1262 utf8encode(unicodep, s, UTF_SIZ);
1263 tputc(s, charsize);
1264 ptr += charsize;
1265 buflen -= charsize;
1266 }
1267
1268 /* keep any uncomplete utf8 char for the next call */
1269 memmove(buf, ptr, buflen);
1270 }
1271
1272 void
1273 ttywrite(const char *s, size_t n) {
1274 if(xwrite(cmdfd, s, n) == -1)
1275 die("write error on tty: %s\n", strerror(errno));
1276 }
1277
1278 void
1279 ttysend(char *s, size_t n) {
1280 ttywrite(s, n);
1281 if(IS_SET(MODE_ECHO))
1282 techo(s, n);
1283 }
1284
1285 void
1286 ttyresize(void) {
1287 struct winsize w;
1288
1289 w.ws_row = term.row;
1290 w.ws_col = term.col;
1291 w.ws_xpixel = xw.tw;
1292 w.ws_ypixel = xw.th;
1293 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1294 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1295 }
1296
1297 int
1298 tattrset(int attr) {
1299 int i, j;
1300
1301 for(i = 0; i < term.row-1; i++) {
1302 for(j = 0; j < term.col-1; j++) {
1303 if(term.line[i][j].mode & attr)
1304 return 1;
1305 }
1306 }
1307
1308 return 0;
1309 }
1310
1311 void
1312 tsetdirt(int top, int bot) {
1313 int i;
1314
1315 LIMIT(top, 0, term.row-1);
1316 LIMIT(bot, 0, term.row-1);
1317
1318 for(i = top; i <= bot; i++)
1319 term.dirty[i] = 1;
1320 }
1321
1322 void
1323 tsetdirtattr(int attr) {
1324 int i, j;
1325
1326 for(i = 0; i < term.row-1; i++) {
1327 for(j = 0; j < term.col-1; j++) {
1328 if(term.line[i][j].mode & attr) {
1329 tsetdirt(i, i);
1330 break;
1331 }
1332 }
1333 }
1334 }
1335
1336 void
1337 tfulldirt(void) {
1338 tsetdirt(0, term.row-1);
1339 }
1340
1341 void
1342 tcursor(int mode) {
1343 static TCursor c[2];
1344 bool alt = IS_SET(MODE_ALTSCREEN);
1345
1346 if(mode == CURSOR_SAVE) {
1347 c[alt] = term.c;
1348 } else if(mode == CURSOR_LOAD) {
1349 term.c = c[alt];
1350 tmoveto(c[alt].x, c[alt].y);
1351 }
1352 }
1353
1354 void
1355 treset(void) {
1356 uint i;
1357
1358 term.c = (TCursor){{
1359 .mode = ATTR_NULL,
1360 .fg = defaultfg,
1361 .bg = defaultbg
1362 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1363
1364 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1365 for(i = tabspaces; i < term.col; i += tabspaces)
1366 term.tabs[i] = 1;
1367 term.top = 0;
1368 term.bot = term.row - 1;
1369 term.mode = MODE_WRAP;
1370 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1371 term.charset = 0;
1372
1373 tclearregion(0, 0, term.col-1, term.row-1);
1374 tmoveto(0, 0);
1375 tcursor(CURSOR_SAVE);
1376 }
1377
1378 void
1379 tnew(int col, int row) {
1380 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1381 tresize(col, row);
1382 term.numlock = 1;
1383
1384 treset();
1385 }
1386
1387 void
1388 tswapscreen(void) {
1389 Line *tmp = term.line;
1390
1391 term.line = term.alt;
1392 term.alt = tmp;
1393 term.mode ^= MODE_ALTSCREEN;
1394 tfulldirt();
1395 }
1396
1397 void
1398 tscrolldown(int orig, int n) {
1399 int i;
1400 Line temp;
1401
1402 LIMIT(n, 0, term.bot-orig+1);
1403
1404 tsetdirt(orig, term.bot-n);
1405 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1406
1407 for(i = term.bot; i >= orig+n; i--) {
1408 temp = term.line[i];
1409 term.line[i] = term.line[i-n];
1410 term.line[i-n] = temp;
1411 }
1412
1413 selscroll(orig, n);
1414 }
1415
1416 void
1417 tscrollup(int orig, int n) {
1418 int i;
1419 Line temp;
1420
1421 LIMIT(n, 0, term.bot-orig+1);
1422
1423 tclearregion(0, orig, term.col-1, orig+n-1);
1424 tsetdirt(orig+n, term.bot);
1425
1426 for(i = orig; i <= term.bot-n; i++) {
1427 temp = term.line[i];
1428 term.line[i] = term.line[i+n];
1429 term.line[i+n] = temp;
1430 }
1431
1432 selscroll(orig, -n);
1433 }
1434
1435 void
1436 selscroll(int orig, int n) {
1437 if(sel.ob.x == -1)
1438 return;
1439
1440 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1441 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1442 selclear(NULL);
1443 return;
1444 }
1445 if(sel.type == SEL_RECTANGULAR) {
1446 if(sel.ob.y < term.top)
1447 sel.ob.y = term.top;
1448 if(sel.oe.y > term.bot)
1449 sel.oe.y = term.bot;
1450 } else {
1451 if(sel.ob.y < term.top) {
1452 sel.ob.y = term.top;
1453 sel.ob.x = 0;
1454 }
1455 if(sel.oe.y > term.bot) {
1456 sel.oe.y = term.bot;
1457 sel.oe.x = term.col;
1458 }
1459 }
1460 selsort();
1461 }
1462 }
1463
1464 void
1465 tnewline(int first_col) {
1466 int y = term.c.y;
1467
1468 if(y == term.bot) {
1469 tscrollup(term.top, 1);
1470 } else {
1471 y++;
1472 }
1473 tmoveto(first_col ? 0 : term.c.x, y);
1474 }
1475
1476 void
1477 csiparse(void) {
1478 char *p = csiescseq.buf, *np;
1479 long int v;
1480
1481 csiescseq.narg = 0;
1482 if(*p == '?') {
1483 csiescseq.priv = 1;
1484 p++;
1485 }
1486
1487 csiescseq.buf[csiescseq.len] = '\0';
1488 while(p < csiescseq.buf+csiescseq.len) {
1489 np = NULL;
1490 v = strtol(p, &np, 10);
1491 if(np == p)
1492 v = 0;
1493 if(v == LONG_MAX || v == LONG_MIN)
1494 v = -1;
1495 csiescseq.arg[csiescseq.narg++] = v;
1496 p = np;
1497 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1498 break;
1499 p++;
1500 }
1501 csiescseq.mode = *p;
1502 }
1503
1504 /* for absolute user moves, when decom is set */
1505 void
1506 tmoveato(int x, int y) {
1507 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1508 }
1509
1510 void
1511 tmoveto(int x, int y) {
1512 int miny, maxy;
1513
1514 if(term.c.state & CURSOR_ORIGIN) {
1515 miny = term.top;
1516 maxy = term.bot;
1517 } else {
1518 miny = 0;
1519 maxy = term.row - 1;
1520 }
1521 LIMIT(x, 0, term.col-1);
1522 LIMIT(y, miny, maxy);
1523 term.c.state &= ~CURSOR_WRAPNEXT;
1524 term.c.x = x;
1525 term.c.y = y;
1526 }
1527
1528 void
1529 tsetchar(char *c, Glyph *attr, int x, int y) {
1530 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1531 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1532 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1533 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1534 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1535 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1536 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1537 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1538 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1539 };
1540
1541 /*
1542 * The table is proudly stolen from rxvt.
1543 */
1544 if(attr->mode & ATTR_GFX) {
1545 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1546 c = vt100_0[c[0] - 0x41];
1547 }
1548 }
1549
1550 if(term.line[y][x].mode & ATTR_WIDE) {
1551 if(x+1 < term.col) {
1552 term.line[y][x+1].c[0] = ' ';
1553 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1554 }
1555 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1556 term.line[y][x-1].c[0] = ' ';
1557 term.line[y][x-1].mode &= ~ATTR_WIDE;
1558 }
1559
1560 term.dirty[y] = 1;
1561 term.line[y][x] = *attr;
1562 memcpy(term.line[y][x].c, c, UTF_SIZ);
1563 }
1564
1565 void
1566 tclearregion(int x1, int y1, int x2, int y2) {
1567 int x, y, temp;
1568
1569 if(x1 > x2)
1570 temp = x1, x1 = x2, x2 = temp;
1571 if(y1 > y2)
1572 temp = y1, y1 = y2, y2 = temp;
1573
1574 LIMIT(x1, 0, term.col-1);
1575 LIMIT(x2, 0, term.col-1);
1576 LIMIT(y1, 0, term.row-1);
1577 LIMIT(y2, 0, term.row-1);
1578
1579 for(y = y1; y <= y2; y++) {
1580 term.dirty[y] = 1;
1581 for(x = x1; x <= x2; x++) {
1582 if(selected(x, y))
1583 selclear(NULL);
1584 term.line[y][x] = term.c.attr;
1585 memcpy(term.line[y][x].c, " ", 2);
1586 }
1587 }
1588 }
1589
1590 void
1591 tdeletechar(int n) {
1592 int dst, src, size;
1593 Glyph *line;
1594
1595 LIMIT(n, 0, term.col - term.c.x);
1596
1597 dst = term.c.x;
1598 src = term.c.x + n;
1599 size = term.col - src;
1600 line = term.line[term.c.y];
1601
1602 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1603 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1604 }
1605
1606 void
1607 tinsertblank(int n) {
1608 int dst, src, size;
1609 Glyph *line;
1610
1611 LIMIT(n, 0, term.col - term.c.x);
1612
1613 dst = term.c.x + n;
1614 src = term.c.x;
1615 size = term.col - dst;
1616 line = term.line[term.c.y];
1617
1618 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1619 tclearregion(src, term.c.y, dst - 1, term.c.y);
1620 }
1621
1622 void
1623 tinsertblankline(int n) {
1624 if(BETWEEN(term.c.y, term.top, term.bot))
1625 tscrolldown(term.c.y, n);
1626 }
1627
1628 void
1629 tdeleteline(int n) {
1630 if(BETWEEN(term.c.y, term.top, term.bot))
1631 tscrollup(term.c.y, n);
1632 }
1633
1634 int32_t
1635 tdefcolor(int *attr, int *npar, int l) {
1636 int32_t idx = -1;
1637 uint r, g, b;
1638
1639 switch (attr[*npar + 1]) {
1640 case 2: /* direct colour in RGB space */
1641 if (*npar + 4 >= l) {
1642 fprintf(stderr,
1643 "erresc(38): Incorrect number of parameters (%d)\n",
1644 *npar);
1645 break;
1646 }
1647 r = attr[*npar + 2];
1648 g = attr[*npar + 3];
1649 b = attr[*npar + 4];
1650 *npar += 4;
1651 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1652 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1653 r, g, b);
1654 else
1655 idx = TRUECOLOR(r, g, b);
1656 break;
1657 case 5: /* indexed colour */
1658 if (*npar + 2 >= l) {
1659 fprintf(stderr,
1660 "erresc(38): Incorrect number of parameters (%d)\n",
1661 *npar);
1662 break;
1663 }
1664 *npar += 2;
1665 if(!BETWEEN(attr[*npar], 0, 255))
1666 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1667 else
1668 idx = attr[*npar];
1669 break;
1670 case 0: /* implemented defined (only foreground) */
1671 case 1: /* transparent */
1672 case 3: /* direct colour in CMY space */
1673 case 4: /* direct colour in CMYK space */
1674 default:
1675 fprintf(stderr,
1676 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1677 break;
1678 }
1679
1680 return idx;
1681 }
1682
1683 void
1684 tsetattr(int *attr, int l) {
1685 int i;
1686 int32_t idx;
1687
1688 for(i = 0; i < l; i++) {
1689 switch(attr[i]) {
1690 case 0:
1691 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1692 | ATTR_BOLD | ATTR_ITALIC \
1693 | ATTR_BLINK);
1694 term.c.attr.fg = defaultfg;
1695 term.c.attr.bg = defaultbg;
1696 break;
1697 case 1:
1698 term.c.attr.mode |= ATTR_BOLD;
1699 break;
1700 case 3:
1701 term.c.attr.mode |= ATTR_ITALIC;
1702 break;
1703 case 4:
1704 term.c.attr.mode |= ATTR_UNDERLINE;
1705 break;
1706 case 5: /* slow blink */
1707 case 6: /* rapid blink */
1708 term.c.attr.mode |= ATTR_BLINK;
1709 break;
1710 case 7:
1711 term.c.attr.mode |= ATTR_REVERSE;
1712 break;
1713 case 21:
1714 case 22:
1715 term.c.attr.mode &= ~ATTR_BOLD;
1716 break;
1717 case 23:
1718 term.c.attr.mode &= ~ATTR_ITALIC;
1719 break;
1720 case 24:
1721 term.c.attr.mode &= ~ATTR_UNDERLINE;
1722 break;
1723 case 25:
1724 case 26:
1725 term.c.attr.mode &= ~ATTR_BLINK;
1726 break;
1727 case 27:
1728 term.c.attr.mode &= ~ATTR_REVERSE;
1729 break;
1730 case 38:
1731 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1732 term.c.attr.fg = idx;
1733 break;
1734 case 39:
1735 term.c.attr.fg = defaultfg;
1736 break;
1737 case 48:
1738 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1739 term.c.attr.bg = idx;
1740 break;
1741 case 49:
1742 term.c.attr.bg = defaultbg;
1743 break;
1744 default:
1745 if(BETWEEN(attr[i], 30, 37)) {
1746 term.c.attr.fg = attr[i] - 30;
1747 } else if(BETWEEN(attr[i], 40, 47)) {
1748 term.c.attr.bg = attr[i] - 40;
1749 } else if(BETWEEN(attr[i], 90, 97)) {
1750 term.c.attr.fg = attr[i] - 90 + 8;
1751 } else if(BETWEEN(attr[i], 100, 107)) {
1752 term.c.attr.bg = attr[i] - 100 + 8;
1753 } else {
1754 fprintf(stderr,
1755 "erresc(default): gfx attr %d unknown\n",
1756 attr[i]), csidump();
1757 }
1758 break;
1759 }
1760 }
1761 }
1762
1763 void
1764 tsetscroll(int t, int b) {
1765 int temp;
1766
1767 LIMIT(t, 0, term.row-1);
1768 LIMIT(b, 0, term.row-1);
1769 if(t > b) {
1770 temp = t;
1771 t = b;
1772 b = temp;
1773 }
1774 term.top = t;
1775 term.bot = b;
1776 }
1777
1778 void
1779 tsetmode(bool priv, bool set, int *args, int narg) {
1780 int *lim, mode;
1781 bool alt;
1782
1783 for(lim = args + narg; args < lim; ++args) {
1784 if(priv) {
1785 switch(*args) {
1786 case 1: /* DECCKM -- Cursor key */
1787 MODBIT(term.mode, set, MODE_APPCURSOR);
1788 break;
1789 case 5: /* DECSCNM -- Reverse video */
1790 mode = term.mode;
1791 MODBIT(term.mode, set, MODE_REVERSE);
1792 if(mode != term.mode)
1793 redraw(REDRAW_TIMEOUT);
1794 break;
1795 case 6: /* DECOM -- Origin */
1796 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1797 tmoveato(0, 0);
1798 break;
1799 case 7: /* DECAWM -- Auto wrap */
1800 MODBIT(term.mode, set, MODE_WRAP);
1801 break;
1802 case 0: /* Error (IGNORED) */
1803 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1804 case 3: /* DECCOLM -- Column (IGNORED) */
1805 case 4: /* DECSCLM -- Scroll (IGNORED) */
1806 case 8: /* DECARM -- Auto repeat (IGNORED) */
1807 case 18: /* DECPFF -- Printer feed (IGNORED) */
1808 case 19: /* DECPEX -- Printer extent (IGNORED) */
1809 case 42: /* DECNRCM -- National characters (IGNORED) */
1810 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1811 break;
1812 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1813 MODBIT(term.mode, !set, MODE_HIDE);
1814 break;
1815 case 9: /* X10 mouse compatibility mode */
1816 xsetpointermotion(0);
1817 MODBIT(term.mode, 0, MODE_MOUSE);
1818 MODBIT(term.mode, set, MODE_MOUSEX10);
1819 break;
1820 case 1000: /* 1000: report button press */
1821 xsetpointermotion(0);
1822 MODBIT(term.mode, 0, MODE_MOUSE);
1823 MODBIT(term.mode, set, MODE_MOUSEBTN);
1824 break;
1825 case 1002: /* 1002: report motion on button press */
1826 xsetpointermotion(0);
1827 MODBIT(term.mode, 0, MODE_MOUSE);
1828 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1829 break;
1830 case 1003: /* 1003: enable all mouse motions */
1831 xsetpointermotion(set);
1832 MODBIT(term.mode, 0, MODE_MOUSE);
1833 MODBIT(term.mode, set, MODE_MOUSEMANY);
1834 break;
1835 case 1004: /* 1004: send focus events to tty */
1836 MODBIT(term.mode, set, MODE_FOCUS);
1837 break;
1838 case 1006: /* 1006: extended reporting mode */
1839 MODBIT(term.mode, set, MODE_MOUSESGR);
1840 break;
1841 case 1034:
1842 MODBIT(term.mode, set, MODE_8BIT);
1843 break;
1844 case 1049: /* swap screen & set/restore cursor as xterm */
1845 if (!allowaltscreen)
1846 break;
1847 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1848 /* FALLTHRU */
1849 case 47: /* swap screen */
1850 case 1047:
1851 if (!allowaltscreen)
1852 break;
1853 alt = IS_SET(MODE_ALTSCREEN);
1854 if(alt) {
1855 tclearregion(0, 0, term.col-1,
1856 term.row-1);
1857 }
1858 if(set ^ alt) /* set is always 1 or 0 */
1859 tswapscreen();
1860 if(*args != 1049)
1861 break;
1862 /* FALLTRU */
1863 case 1048:
1864 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1865 break;
1866 case 2004: /* 2004: bracketed paste mode */
1867 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1868 break;
1869 /* Not implemented mouse modes. See comments there. */
1870 case 1001: /* mouse highlight mode; can hang the
1871 terminal by design when implemented. */
1872 case 1005: /* UTF-8 mouse mode; will confuse
1873 applications not supporting UTF-8
1874 and luit. */
1875 case 1015: /* urxvt mangled mouse mode; incompatible
1876 and can be mistaken for other control
1877 codes. */
1878 default:
1879 fprintf(stderr,
1880 "erresc: unknown private set/reset mode %d\n",
1881 *args);
1882 break;
1883 }
1884 } else {
1885 switch(*args) {
1886 case 0: /* Error (IGNORED) */
1887 break;
1888 case 2: /* KAM -- keyboard action */
1889 MODBIT(term.mode, set, MODE_KBDLOCK);
1890 break;
1891 case 4: /* IRM -- Insertion-replacement */
1892 MODBIT(term.mode, set, MODE_INSERT);
1893 break;
1894 case 12: /* SRM -- Send/Receive */
1895 MODBIT(term.mode, !set, MODE_ECHO);
1896 break;
1897 case 20: /* LNM -- Linefeed/new line */
1898 MODBIT(term.mode, set, MODE_CRLF);
1899 break;
1900 default:
1901 fprintf(stderr,
1902 "erresc: unknown set/reset mode %d\n",
1903 *args);
1904 break;
1905 }
1906 }
1907 }
1908 }
1909
1910 void
1911 csihandle(void) {
1912 char buf[40];
1913 int len;
1914
1915 switch(csiescseq.mode) {
1916 default:
1917 unknown:
1918 fprintf(stderr, "erresc: unknown csi ");
1919 csidump();
1920 /* die(""); */
1921 break;
1922 case '@': /* ICH -- Insert <n> blank char */
1923 DEFAULT(csiescseq.arg[0], 1);
1924 tinsertblank(csiescseq.arg[0]);
1925 break;
1926 case 'A': /* CUU -- Cursor <n> Up */
1927 DEFAULT(csiescseq.arg[0], 1);
1928 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1929 break;
1930 case 'B': /* CUD -- Cursor <n> Down */
1931 case 'e': /* VPR --Cursor <n> Down */
1932 DEFAULT(csiescseq.arg[0], 1);
1933 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1934 break;
1935 case 'i': /* MC -- Media Copy */
1936 switch(csiescseq.arg[0]) {
1937 case 0:
1938 tdump();
1939 break;
1940 case 1:
1941 tdumpline(term.c.y);
1942 break;
1943 case 2:
1944 tdumpsel();
1945 break;
1946 case 4:
1947 term.mode &= ~MODE_PRINT;
1948 break;
1949 case 5:
1950 term.mode |= MODE_PRINT;
1951 break;
1952 }
1953 break;
1954 case 'c': /* DA -- Device Attributes */
1955 if(csiescseq.arg[0] == 0)
1956 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1957 break;
1958 case 'C': /* CUF -- Cursor <n> Forward */
1959 case 'a': /* HPR -- Cursor <n> Forward */
1960 DEFAULT(csiescseq.arg[0], 1);
1961 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1962 break;
1963 case 'D': /* CUB -- Cursor <n> Backward */
1964 DEFAULT(csiescseq.arg[0], 1);
1965 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1966 break;
1967 case 'E': /* CNL -- Cursor <n> Down and first col */
1968 DEFAULT(csiescseq.arg[0], 1);
1969 tmoveto(0, term.c.y+csiescseq.arg[0]);
1970 break;
1971 case 'F': /* CPL -- Cursor <n> Up and first col */
1972 DEFAULT(csiescseq.arg[0], 1);
1973 tmoveto(0, term.c.y-csiescseq.arg[0]);
1974 break;
1975 case 'g': /* TBC -- Tabulation clear */
1976 switch(csiescseq.arg[0]) {
1977 case 0: /* clear current tab stop */
1978 term.tabs[term.c.x] = 0;
1979 break;
1980 case 3: /* clear all the tabs */
1981 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1982 break;
1983 default:
1984 goto unknown;
1985 }
1986 break;
1987 case 'G': /* CHA -- Move to <col> */
1988 case '`': /* HPA */
1989 DEFAULT(csiescseq.arg[0], 1);
1990 tmoveto(csiescseq.arg[0]-1, term.c.y);
1991 break;
1992 case 'H': /* CUP -- Move to <row> <col> */
1993 case 'f': /* HVP */
1994 DEFAULT(csiescseq.arg[0], 1);
1995 DEFAULT(csiescseq.arg[1], 1);
1996 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1997 break;
1998 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1999 DEFAULT(csiescseq.arg[0], 1);
2000 tputtab(csiescseq.arg[0]);
2001 break;
2002 case 'J': /* ED -- Clear screen */
2003 selclear(NULL);
2004 switch(csiescseq.arg[0]) {
2005 case 0: /* below */
2006 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2007 if(term.c.y < term.row-1) {
2008 tclearregion(0, term.c.y+1, term.col-1,
2009 term.row-1);
2010 }
2011 break;
2012 case 1: /* above */
2013 if(term.c.y > 1)
2014 tclearregion(0, 0, term.col-1, term.c.y-1);
2015 tclearregion(0, term.c.y, term.c.x, term.c.y);
2016 break;
2017 case 2: /* all */
2018 tclearregion(0, 0, term.col-1, term.row-1);
2019 break;
2020 default:
2021 goto unknown;
2022 }
2023 break;
2024 case 'K': /* EL -- Clear line */
2025 switch(csiescseq.arg[0]) {
2026 case 0: /* right */
2027 tclearregion(term.c.x, term.c.y, term.col-1,
2028 term.c.y);
2029 break;
2030 case 1: /* left */
2031 tclearregion(0, term.c.y, term.c.x, term.c.y);
2032 break;
2033 case 2: /* all */
2034 tclearregion(0, term.c.y, term.col-1, term.c.y);
2035 break;
2036 }
2037 break;
2038 case 'S': /* SU -- Scroll <n> line up */
2039 DEFAULT(csiescseq.arg[0], 1);
2040 tscrollup(term.top, csiescseq.arg[0]);
2041 break;
2042 case 'T': /* SD -- Scroll <n> line down */
2043 DEFAULT(csiescseq.arg[0], 1);
2044 tscrolldown(term.top, csiescseq.arg[0]);
2045 break;
2046 case 'L': /* IL -- Insert <n> blank lines */
2047 DEFAULT(csiescseq.arg[0], 1);
2048 tinsertblankline(csiescseq.arg[0]);
2049 break;
2050 case 'l': /* RM -- Reset Mode */
2051 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2052 break;
2053 case 'M': /* DL -- Delete <n> lines */
2054 DEFAULT(csiescseq.arg[0], 1);
2055 tdeleteline(csiescseq.arg[0]);
2056 break;
2057 case 'X': /* ECH -- Erase <n> char */
2058 DEFAULT(csiescseq.arg[0], 1);
2059 tclearregion(term.c.x, term.c.y,
2060 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2061 break;
2062 case 'P': /* DCH -- Delete <n> char */
2063 DEFAULT(csiescseq.arg[0], 1);
2064 tdeletechar(csiescseq.arg[0]);
2065 break;
2066 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2067 DEFAULT(csiescseq.arg[0], 1);
2068 tputtab(-csiescseq.arg[0]);
2069 break;
2070 case 'd': /* VPA -- Move to <row> */
2071 DEFAULT(csiescseq.arg[0], 1);
2072 tmoveato(term.c.x, csiescseq.arg[0]-1);
2073 break;
2074 case 'h': /* SM -- Set terminal mode */
2075 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2076 break;
2077 case 'm': /* SGR -- Terminal attribute (color) */
2078 tsetattr(csiescseq.arg, csiescseq.narg);
2079 break;
2080 case 'n': /* DSR – Device Status Report (cursor position) */
2081 if (csiescseq.arg[0] == 6) {
2082 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2083 term.c.y+1, term.c.x+1);
2084 ttywrite(buf, len);
2085 break;
2086 }
2087 case 'r': /* DECSTBM -- Set Scrolling Region */
2088 if(csiescseq.priv) {
2089 goto unknown;
2090 } else {
2091 DEFAULT(csiescseq.arg[0], 1);
2092 DEFAULT(csiescseq.arg[1], term.row);
2093 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2094 tmoveato(0, 0);
2095 }
2096 break;
2097 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2098 tcursor(CURSOR_SAVE);
2099 break;
2100 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2101 tcursor(CURSOR_LOAD);
2102 break;
2103 }
2104 }
2105
2106 void
2107 csidump(void) {
2108 int i;
2109 uint c;
2110
2111 printf("ESC[");
2112 for(i = 0; i < csiescseq.len; i++) {
2113 c = csiescseq.buf[i] & 0xff;
2114 if(isprint(c)) {
2115 putchar(c);
2116 } else if(c == '\n') {
2117 printf("(\\n)");
2118 } else if(c == '\r') {
2119 printf("(\\r)");
2120 } else if(c == 0x1b) {
2121 printf("(\\e)");
2122 } else {
2123 printf("(%02x)", c);
2124 }
2125 }
2126 putchar('\n');
2127 }
2128
2129 void
2130 csireset(void) {
2131 memset(&csiescseq, 0, sizeof(csiescseq));
2132 }
2133
2134 void
2135 strhandle(void) {
2136 char *p = NULL;
2137 int j, narg, par;
2138
2139 strparse();
2140 narg = strescseq.narg;
2141 par = atoi(strescseq.args[0]);
2142
2143 switch(strescseq.type) {
2144 case ']': /* OSC -- Operating System Command */
2145 switch(par) {
2146 case 0:
2147 case 1:
2148 case 2:
2149 if(narg > 1)
2150 xsettitle(strescseq.args[1]);
2151 return;
2152 case 4: /* color set */
2153 if(narg < 3)
2154 break;
2155 p = strescseq.args[2];
2156 /* fall through */
2157 case 104: /* color reset, here p = NULL */
2158 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2159 if (!xsetcolorname(j, p)) {
2160 fprintf(stderr, "erresc: invalid color %s\n", p);
2161 } else {
2162 /*
2163 * TODO if defaultbg color is changed, borders
2164 * are dirty
2165 */
2166 redraw(0);
2167 }
2168 return;
2169 }
2170 break;
2171 case 'k': /* old title set compatibility */
2172 xsettitle(strescseq.args[0]);
2173 return;
2174 case 'P': /* DCS -- Device Control String */
2175 case '_': /* APC -- Application Program Command */
2176 case '^': /* PM -- Privacy Message */
2177 return;
2178 }
2179
2180 fprintf(stderr, "erresc: unknown str ");
2181 strdump();
2182 }
2183
2184 void
2185 strparse(void) {
2186 char *p = strescseq.buf;
2187
2188 strescseq.narg = 0;
2189 strescseq.buf[strescseq.len] = '\0';
2190 while(p && strescseq.narg < STR_ARG_SIZ)
2191 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2192 }
2193
2194 void
2195 strdump(void) {
2196 int i;
2197 uint c;
2198
2199 printf("ESC%c", strescseq.type);
2200 for(i = 0; i < strescseq.len; i++) {
2201 c = strescseq.buf[i] & 0xff;
2202 if(c == '\0') {
2203 return;
2204 } else if(isprint(c)) {
2205 putchar(c);
2206 } else if(c == '\n') {
2207 printf("(\\n)");
2208 } else if(c == '\r') {
2209 printf("(\\r)");
2210 } else if(c == 0x1b) {
2211 printf("(\\e)");
2212 } else {
2213 printf("(%02x)", c);
2214 }
2215 }
2216 printf("ESC\\\n");
2217 }
2218
2219 void
2220 strreset(void) {
2221 memset(&strescseq, 0, sizeof(strescseq));
2222 }
2223
2224 void
2225 tprinter(char *s, size_t len) {
2226 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2227 fprintf(stderr, "Error writing in %s:%s\n",
2228 opt_io, strerror(errno));
2229 close(iofd);
2230 iofd = -1;
2231 }
2232 }
2233
2234 void
2235 toggleprinter(const Arg *arg) {
2236 term.mode ^= MODE_PRINT;
2237 }
2238
2239 void
2240 printscreen(const Arg *arg) {
2241 tdump();
2242 }
2243
2244 void
2245 printsel(const Arg *arg) {
2246 tdumpsel();
2247 }
2248
2249 void
2250 tdumpsel(void) {
2251 char *ptr;
2252
2253 if((ptr = getsel())) {
2254 tprinter(ptr, strlen(ptr));
2255 free(ptr);
2256 }
2257 }
2258
2259 void
2260 tdumpline(int n) {
2261 Glyph *bp, *end;
2262
2263 bp = &term.line[n][0];
2264 end = &bp[term.col-1];
2265 while(end > bp && !strcmp(" ", end->c))
2266 --end;
2267 if(bp != end || strcmp(bp->c, " ")) {
2268 for( ;bp <= end; ++bp)
2269 tprinter(bp->c, strlen(bp->c));
2270 }
2271 tprinter("\n", 1);
2272 }
2273
2274 void
2275 tdump(void) {
2276 int i;
2277
2278 for(i = 0; i < term.row; ++i)
2279 tdumpline(i);
2280 }
2281
2282 void
2283 tputtab(int n) {
2284 uint x = term.c.x;
2285
2286 if(n > 0) {
2287 while(x < term.col && n--)
2288 for(++x; x < term.col && !term.tabs[x]; ++x)
2289 /* nothing */ ;
2290 } else if(n < 0) {
2291 while(x > 0 && n++)
2292 for(--x; x > 0 && !term.tabs[x]; --x)
2293 /* nothing */ ;
2294 }
2295 tmoveto(x, term.c.y);
2296 }
2297
2298 void
2299 techo(char *buf, int len) {
2300 for(; len > 0; buf++, len--) {
2301 char c = *buf;
2302
2303 if(BETWEEN(c, 0x00, 0x1f) || c == 0x7f) { /* control code */
2304 if(c != '\n' && c != '\r' && c != '\t') {
2305 c ^= '\x40';
2306 tputc("^", 1);
2307 }
2308 tputc(&c, 1);
2309 } else {
2310 break;
2311 }
2312 }
2313 if(len)
2314 tputc(buf, len);
2315 }
2316
2317 void
2318 tdeftran(char ascii) {
2319 char c, (*bp)[2];
2320 static char tbl[][2] = {
2321 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2322 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2323 {'5', CS_FIN}, {'C', CS_FIN},
2324 {0, 0}
2325 };
2326
2327 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2328 /* nothing */;
2329
2330 if (c == 0)
2331 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2332 else
2333 term.trantbl[term.icharset] = (*bp)[1];
2334 }
2335
2336 void
2337 tselcs(void) {
2338 MODBIT(term.c.attr.mode,
2339 term.trantbl[term.charset] == CS_GRAPHIC0,
2340 ATTR_GFX);
2341 }
2342
2343 void
2344 tputc(char *c, int len) {
2345 uchar ascii = *c;
2346 bool control = ascii < '\x20' || ascii == 0177;
2347 long unicodep;
2348 int width;
2349
2350 if(len == 1) {
2351 width = 1;
2352 } else {
2353 utf8decode(c, &unicodep, UTF_SIZ);
2354 width = wcwidth(unicodep);
2355 }
2356
2357 if(IS_SET(MODE_PRINT))
2358 tprinter(c, len);
2359
2360 /*
2361 * STR sequences must be checked before anything else
2362 * because it can use some control codes as part of the sequence.
2363 */
2364 if(term.esc & ESC_STR) {
2365 switch(ascii) {
2366 case '\033':
2367 term.esc = ESC_START | ESC_STR_END;
2368 break;
2369 case '\a': /* backwards compatibility to xterm */
2370 term.esc = 0;
2371 strhandle();
2372 break;
2373 default:
2374 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2375 memmove(&strescseq.buf[strescseq.len], c, len);
2376 strescseq.len += len;
2377 } else {
2378 /*
2379 * Here is a bug in terminals. If the user never sends
2380 * some code to stop the str or esc command, then st
2381 * will stop responding. But this is better than
2382 * silently failing with unknown characters. At least
2383 * then users will report back.
2384 *
2385 * In the case users ever get fixed, here is the code:
2386 */
2387 /*
2388 * term.esc = 0;
2389 * strhandle();
2390 */
2391 }
2392 break;
2393 }
2394 return;
2395 }
2396
2397 /*
2398 * Actions of control codes must be performed as soon they arrive
2399 * because they can be embedded inside a control sequence, and
2400 * they must not cause conflicts with sequences.
2401 */
2402 if(control) {
2403 switch(ascii) {
2404 case '\t': /* HT */
2405 tputtab(1);
2406 return;
2407 case '\b': /* BS */
2408 tmoveto(term.c.x-1, term.c.y);
2409 return;
2410 case '\r': /* CR */
2411 tmoveto(0, term.c.y);
2412 return;
2413 case '\f': /* LF */
2414 case '\v': /* VT */
2415 case '\n': /* LF */
2416 /* go to first col if the mode is set */
2417 tnewline(IS_SET(MODE_CRLF));
2418 return;
2419 case '\a': /* BEL */
2420 if(!(xw.state & WIN_FOCUSED))
2421 xseturgency(1);
2422 if (bellvolume)
2423 XBell(xw.dpy, bellvolume);
2424 return;
2425 case '\033': /* ESC */
2426 csireset();
2427 term.esc = ESC_START;
2428 return;
2429 case '\016': /* SO */
2430 term.charset = 0;
2431 tselcs();
2432 return;
2433 case '\017': /* SI */
2434 term.charset = 1;
2435 tselcs();
2436 return;
2437 case '\032': /* SUB */
2438 case '\030': /* CAN */
2439 csireset();
2440 return;
2441 case '\005': /* ENQ (IGNORED) */
2442 case '\000': /* NUL (IGNORED) */
2443 case '\021': /* XON (IGNORED) */
2444 case '\023': /* XOFF (IGNORED) */
2445 case 0177: /* DEL (IGNORED) */
2446 return;
2447 }
2448 } else if(term.esc & ESC_START) {
2449 if(term.esc & ESC_CSI) {
2450 csiescseq.buf[csiescseq.len++] = ascii;
2451 if(BETWEEN(ascii, 0x40, 0x7E)
2452 || csiescseq.len >= \
2453 sizeof(csiescseq.buf)-1) {
2454 term.esc = 0;
2455 csiparse();
2456 csihandle();
2457 }
2458 } else if(term.esc & ESC_ALTCHARSET) {
2459 tdeftran(ascii);
2460 tselcs();
2461 term.esc = 0;
2462 } else if(term.esc & ESC_TEST) {
2463 if(ascii == '8') { /* DEC screen alignment test. */
2464 char E[UTF_SIZ] = "E";
2465 int x, y;
2466
2467 for(x = 0; x < term.col; ++x) {
2468 for(y = 0; y < term.row; ++y)
2469 tsetchar(E, &term.c.attr, x, y);
2470 }
2471 }
2472 term.esc = 0;
2473 } else {
2474 switch(ascii) {
2475 case '[':
2476 term.esc |= ESC_CSI;
2477 break;
2478 case '#':
2479 term.esc |= ESC_TEST;
2480 break;
2481 case 'P': /* DCS -- Device Control String */
2482 case '_': /* APC -- Application Program Command */
2483 case '^': /* PM -- Privacy Message */
2484 case ']': /* OSC -- Operating System Command */
2485 case 'k': /* old title set compatibility */
2486 strreset();
2487 strescseq.type = ascii;
2488 term.esc |= ESC_STR;
2489 break;
2490 case '(': /* set primary charset G0 */
2491 case ')': /* set secondary charset G1 */
2492 case '*': /* set tertiary charset G2 */
2493 case '+': /* set quaternary charset G3 */
2494 term.icharset = ascii - '(';
2495 term.esc |= ESC_ALTCHARSET;
2496 break;
2497 case 'D': /* IND -- Linefeed */
2498 if(term.c.y == term.bot) {
2499 tscrollup(term.top, 1);
2500 } else {
2501 tmoveto(term.c.x, term.c.y+1);
2502 }
2503 term.esc = 0;
2504 break;
2505 case 'E': /* NEL -- Next line */
2506 tnewline(1); /* always go to first col */
2507 term.esc = 0;
2508 break;
2509 case 'H': /* HTS -- Horizontal tab stop */
2510 term.tabs[term.c.x] = 1;
2511 term.esc = 0;
2512 break;
2513 case 'M': /* RI -- Reverse index */
2514 if(term.c.y == term.top) {
2515 tscrolldown(term.top, 1);
2516 } else {
2517 tmoveto(term.c.x, term.c.y-1);
2518 }
2519 term.esc = 0;
2520 break;
2521 case 'Z': /* DECID -- Identify Terminal */
2522 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2523 term.esc = 0;
2524 break;
2525 case 'c': /* RIS -- Reset to inital state */
2526 treset();
2527 term.esc = 0;
2528 xresettitle();
2529 xloadcols();
2530 break;
2531 case '=': /* DECPAM -- Application keypad */
2532 term.mode |= MODE_APPKEYPAD;
2533 term.esc = 0;
2534 break;
2535 case '>': /* DECPNM -- Normal keypad */
2536 term.mode &= ~MODE_APPKEYPAD;
2537 term.esc = 0;
2538 break;
2539 case '7': /* DECSC -- Save Cursor */
2540 tcursor(CURSOR_SAVE);
2541 term.esc = 0;
2542 break;
2543 case '8': /* DECRC -- Restore Cursor */
2544 tcursor(CURSOR_LOAD);
2545 term.esc = 0;
2546 break;
2547 case '\\': /* ST -- String Terminator */
2548 if(term.esc & ESC_STR_END)
2549 strhandle();
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 break;
2557 }
2558 }
2559 /*
2560 * All characters which form part of a sequence are not
2561 * printed
2562 */
2563 return;
2564 }
2565 /*
2566 * Display control codes only if we are in graphic mode
2567 */
2568 if(control && !(term.c.attr.mode & ATTR_GFX))
2569 return;
2570 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2571 selclear(NULL);
2572 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2573 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2574 tnewline(1);
2575 }
2576
2577 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2578 memmove(&term.line[term.c.y][term.c.x+1],
2579 &term.line[term.c.y][term.c.x],
2580 (term.col - term.c.x - 1) * sizeof(Glyph));
2581 }
2582
2583 if(term.c.x+width > term.col)
2584 tnewline(1);
2585
2586 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2587
2588 if(width == 2) {
2589 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2590 if(term.c.x+1 < term.col) {
2591 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2592 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2593 }
2594 }
2595 if(term.c.x+width < term.col) {
2596 tmoveto(term.c.x+width, term.c.y);
2597 } else {
2598 term.c.state |= CURSOR_WRAPNEXT;
2599 }
2600 }
2601
2602 int
2603 tresize(int col, int row) {
2604 int i;
2605 int minrow = MIN(row, term.row);
2606 int mincol = MIN(col, term.col);
2607 int slide = term.c.y - row + 1;
2608 bool *bp;
2609 Line *orig;
2610
2611 if(col < 1 || row < 1)
2612 return 0;
2613
2614 /* free unneeded rows */
2615 i = 0;
2616 if(slide > 0) {
2617 /*
2618 * slide screen to keep cursor where we expect it -
2619 * tscrollup would work here, but we can optimize to
2620 * memmove because we're freeing the earlier lines
2621 */
2622 for(/* i = 0 */; i < slide; i++) {
2623 free(term.line[i]);
2624 free(term.alt[i]);
2625 }
2626 memmove(term.line, term.line + slide, row * sizeof(Line));
2627 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2628 }
2629 for(i += row; i < term.row; i++) {
2630 free(term.line[i]);
2631 free(term.alt[i]);
2632 }
2633
2634 /* resize to new height */
2635 term.line = xrealloc(term.line, row * sizeof(Line));
2636 term.alt = xrealloc(term.alt, row * sizeof(Line));
2637 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2638 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2639
2640 /* resize each row to new width, zero-pad if needed */
2641 for(i = 0; i < minrow; i++) {
2642 term.dirty[i] = 1;
2643 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2644 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2645 }
2646
2647 /* allocate any new rows */
2648 for(/* i == minrow */; i < row; i++) {
2649 term.dirty[i] = 1;
2650 term.line[i] = xmalloc(col * sizeof(Glyph));
2651 term.alt[i] = xmalloc(col * sizeof(Glyph));
2652 }
2653 if(col > term.col) {
2654 bp = term.tabs + term.col;
2655
2656 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2657 while(--bp > term.tabs && !*bp)
2658 /* nothing */ ;
2659 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2660 *bp = 1;
2661 }
2662 /* update terminal size */
2663 term.col = col;
2664 term.row = row;
2665 /* reset scrolling region */
2666 tsetscroll(0, row-1);
2667 /* make use of the LIMIT in tmoveto */
2668 tmoveto(term.c.x, term.c.y);
2669 /* Clearing both screens */
2670 orig = term.line;
2671 do {
2672 if(mincol < col && 0 < minrow) {
2673 tclearregion(mincol, 0, col - 1, minrow - 1);
2674 }
2675 if(0 < col && minrow < row) {
2676 tclearregion(0, minrow, col - 1, row - 1);
2677 }
2678 tcursor(CURSOR_SAVE);
2679 tswapscreen();
2680 tcursor(CURSOR_LOAD);
2681 } while(orig != term.line);
2682
2683 return (slide > 0);
2684 }
2685
2686 void
2687 xresize(int col, int row) {
2688 xw.tw = MAX(1, col * xw.cw);
2689 xw.th = MAX(1, row * xw.ch);
2690
2691 XFreePixmap(xw.dpy, xw.buf);
2692 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2693 DefaultDepth(xw.dpy, xw.scr));
2694 XftDrawChange(xw.draw, xw.buf);
2695 xclear(0, 0, xw.w, xw.h);
2696 }
2697
2698 static inline ushort
2699 sixd_to_16bit(int x) {
2700 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2701 }
2702
2703 void
2704 xloadcols(void) {
2705 int i, r, g, b;
2706 XRenderColor color = { .alpha = 0xffff };
2707 static bool loaded;
2708 Colour *cp;
2709
2710 if(loaded) {
2711 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2712 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2713 }
2714
2715 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2716 for(i = 0; i < LEN(colorname); i++) {
2717 if(!colorname[i])
2718 continue;
2719 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2720 die("Could not allocate color '%s'\n", colorname[i]);
2721 }
2722 }
2723
2724 /* load colors [16-255] ; same colors as xterm */
2725 for(i = 16, r = 0; r < 6; r++) {
2726 for(g = 0; g < 6; g++) {
2727 for(b = 0; b < 6; b++) {
2728 color.red = sixd_to_16bit(r);
2729 color.green = sixd_to_16bit(g);
2730 color.blue = sixd_to_16bit(b);
2731 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2732 die("Could not allocate color %d\n", i);
2733 }
2734 i++;
2735 }
2736 }
2737 }
2738
2739 for(r = 0; r < 24; r++, i++) {
2740 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2741 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2742 &dc.col[i])) {
2743 die("Could not allocate color %d\n", i);
2744 }
2745 }
2746 loaded = true;
2747 }
2748
2749 int
2750 xsetcolorname(int x, const char *name) {
2751 XRenderColor color = { .alpha = 0xffff };
2752 Colour colour;
2753 if(!BETWEEN(x, 0, LEN(colorname)))
2754 return -1;
2755 if(!name) {
2756 if(BETWEEN(x, 16, 16 + 215)) {
2757 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2758 color.red = sixd_to_16bit(r);
2759 color.green = sixd_to_16bit(g);
2760 color.blue = sixd_to_16bit(b);
2761 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2762 return 0; /* something went wrong */
2763 dc.col[x] = colour;
2764 return 1;
2765 } else if(BETWEEN(x, 16 + 216, 255)) {
2766 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2767 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2768 return 0; /* something went wrong */
2769 dc.col[x] = colour;
2770 return 1;
2771 } else {
2772 name = colorname[x];
2773 }
2774 }
2775 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2776 return 0;
2777 dc.col[x] = colour;
2778 return 1;
2779 }
2780
2781 void
2782 xtermclear(int col1, int row1, int col2, int row2) {
2783 XftDrawRect(xw.draw,
2784 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2785 borderpx + col1 * xw.cw,
2786 borderpx + row1 * xw.ch,
2787 (col2-col1+1) * xw.cw,
2788 (row2-row1+1) * xw.ch);
2789 }
2790
2791 /*
2792 * Absolute coordinates.
2793 */
2794 void
2795 xclear(int x1, int y1, int x2, int y2) {
2796 XftDrawRect(xw.draw,
2797 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2798 x1, y1, x2-x1, y2-y1);
2799 }
2800
2801 void
2802 xhints(void) {
2803 XClassHint class = {opt_class ? opt_class : termname, termname};
2804 XWMHints wm = {.flags = InputHint, .input = 1};
2805 XSizeHints *sizeh = NULL;
2806
2807 sizeh = XAllocSizeHints();
2808
2809 sizeh->flags = PSize | PResizeInc | PBaseSize;
2810 sizeh->height = xw.h;
2811 sizeh->width = xw.w;
2812 sizeh->height_inc = xw.ch;
2813 sizeh->width_inc = xw.cw;
2814 sizeh->base_height = 2 * borderpx;
2815 sizeh->base_width = 2 * borderpx;
2816 if(xw.isfixed == True) {
2817 sizeh->flags |= PMaxSize | PMinSize;
2818 sizeh->min_width = sizeh->max_width = xw.w;
2819 sizeh->min_height = sizeh->max_height = xw.h;
2820 }
2821 if(xw.gm & (XValue|YValue)) {
2822 sizeh->flags |= USPosition | PWinGravity;
2823 sizeh->x = xw.l;
2824 sizeh->y = xw.t;
2825 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2826 }
2827
2828 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2829 &class);
2830 XFree(sizeh);
2831 }
2832
2833 int
2834 xgeommasktogravity(int mask) {
2835 switch(mask & (XNegative|YNegative)) {
2836 case 0:
2837 return NorthWestGravity;
2838 case XNegative:
2839 return NorthEastGravity;
2840 case YNegative:
2841 return SouthWestGravity;
2842 }
2843 return SouthEastGravity;
2844 }
2845
2846 int
2847 xloadfont(Font *f, FcPattern *pattern) {
2848 FcPattern *match;
2849 FcResult result;
2850
2851 match = FcFontMatch(NULL, pattern, &result);
2852 if(!match)
2853 return 1;
2854
2855 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2856 FcPatternDestroy(match);
2857 return 1;
2858 }
2859
2860 f->set = NULL;
2861 f->pattern = FcPatternDuplicate(pattern);
2862
2863 f->ascent = f->match->ascent;
2864 f->descent = f->match->descent;
2865 f->lbearing = 0;
2866 f->rbearing = f->match->max_advance_width;
2867
2868 f->height = f->ascent + f->descent;
2869 f->width = f->lbearing + f->rbearing;
2870
2871 return 0;
2872 }
2873
2874 void
2875 xloadfonts(char *fontstr, double fontsize) {
2876 FcPattern *pattern;
2877 FcResult r_sz, r_psz;
2878 double fontval;
2879
2880 if(fontstr[0] == '-') {
2881 pattern = XftXlfdParse(fontstr, False, False);
2882 } else {
2883 pattern = FcNameParse((FcChar8 *)fontstr);
2884 }
2885
2886 if(!pattern)
2887 die("st: can't open font %s\n", fontstr);
2888
2889 if(fontsize > 0) {
2890 FcPatternDel(pattern, FC_PIXEL_SIZE);
2891 FcPatternDel(pattern, FC_SIZE);
2892 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2893 usedfontsize = fontsize;
2894 } else {
2895 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2896 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2897 if(r_psz == FcResultMatch) {
2898 usedfontsize = fontval;
2899 } else if(r_sz == FcResultMatch) {
2900 usedfontsize = -1;
2901 } else {
2902 /*
2903 * Default font size is 12, if none given. This is to
2904 * have a known usedfontsize value.
2905 */
2906 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2907 usedfontsize = 12;
2908 }
2909 }
2910
2911 FcConfigSubstitute(0, pattern, FcMatchPattern);
2912 FcDefaultSubstitute(pattern);
2913
2914 if(xloadfont(&dc.font, pattern))
2915 die("st: can't open font %s\n", fontstr);
2916
2917 if(usedfontsize < 0) {
2918 FcPatternGetDouble(dc.font.match->pattern,
2919 FC_PIXEL_SIZE, 0, &fontval);
2920 usedfontsize = fontval;
2921 }
2922
2923 /* Setting character width and height. */
2924 xw.cw = CEIL(dc.font.width * cwscale);
2925 xw.ch = CEIL(dc.font.height * chscale);
2926
2927 FcPatternDel(pattern, FC_SLANT);
2928 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2929 if(xloadfont(&dc.ifont, pattern))
2930 die("st: can't open font %s\n", fontstr);
2931
2932 FcPatternDel(pattern, FC_WEIGHT);
2933 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2934 if(xloadfont(&dc.ibfont, pattern))
2935 die("st: can't open font %s\n", fontstr);
2936
2937 FcPatternDel(pattern, FC_SLANT);
2938 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2939 if(xloadfont(&dc.bfont, pattern))
2940 die("st: can't open font %s\n", fontstr);
2941
2942 FcPatternDestroy(pattern);
2943 }
2944
2945 int
2946 xloadfontset(Font *f) {
2947 FcResult result;
2948
2949 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2950 return 1;
2951 return 0;
2952 }
2953
2954 void
2955 xunloadfont(Font *f) {
2956 XftFontClose(xw.dpy, f->match);
2957 FcPatternDestroy(f->pattern);
2958 if(f->set)
2959 FcFontSetDestroy(f->set);
2960 }
2961
2962 void
2963 xunloadfonts(void) {
2964 int i;
2965
2966 /* Free the loaded fonts in the font cache. */
2967 for(i = 0; i < frclen; i++) {
2968 XftFontClose(xw.dpy, frc[i].font);
2969 }
2970 frclen = 0;
2971
2972 xunloadfont(&dc.font);
2973 xunloadfont(&dc.bfont);
2974 xunloadfont(&dc.ifont);
2975 xunloadfont(&dc.ibfont);
2976 }
2977
2978 void
2979 xzoom(const Arg *arg) {
2980 xunloadfonts();
2981 xloadfonts(usedfont, usedfontsize + arg->i);
2982 cresize(0, 0);
2983 redraw(0);
2984 }
2985
2986 void
2987 xinit(void) {
2988 XGCValues gcvalues;
2989 Cursor cursor;
2990 Window parent;
2991 pid_t thispid = getpid();
2992
2993 if(!(xw.dpy = XOpenDisplay(NULL)))
2994 die("Can't open display\n");
2995 xw.scr = XDefaultScreen(xw.dpy);
2996 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2997
2998 /* font */
2999 if(!FcInit())
3000 die("Could not init fontconfig.\n");
3001
3002 usedfont = (opt_font == NULL)? font : opt_font;
3003 xloadfonts(usedfont, 0);
3004
3005 /* colors */
3006 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3007 xloadcols();
3008
3009 /* adjust fixed window geometry */
3010 xw.w = 2 * borderpx + term.col * xw.cw;
3011 xw.h = 2 * borderpx + term.row * xw.ch;
3012 if(xw.gm & XNegative)
3013 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3014 if(xw.gm & YNegative)
3015 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3016
3017 /* Events */
3018 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3019 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3020 xw.attrs.bit_gravity = NorthWestGravity;
3021 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3022 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3023 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3024 xw.attrs.colormap = xw.cmap;
3025
3026 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3027 XRootWindow(xw.dpy, xw.scr);
3028 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3029 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3030 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3031 | CWEventMask | CWColormap, &xw.attrs);
3032
3033 memset(&gcvalues, 0, sizeof(gcvalues));
3034 gcvalues.graphics_exposures = False;
3035 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3036 &gcvalues);
3037 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3038 DefaultDepth(xw.dpy, xw.scr));
3039 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3040 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3041
3042 /* Xft rendering context */
3043 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3044
3045 /* input methods */
3046 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3047 XSetLocaleModifiers("@im=local");
3048 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3049 XSetLocaleModifiers("@im=");
3050 if((xw.xim = XOpenIM(xw.dpy,
3051 NULL, NULL, NULL)) == NULL) {
3052 die("XOpenIM failed. Could not open input"
3053 " device.\n");
3054 }
3055 }
3056 }
3057 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3058 | XIMStatusNothing, XNClientWindow, xw.win,
3059 XNFocusWindow, xw.win, NULL);
3060 if(xw.xic == NULL)
3061 die("XCreateIC failed. Could not obtain input method.\n");
3062
3063 /* white cursor, black outline */
3064 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3065 XDefineCursor(xw.dpy, xw.win, cursor);
3066 XRecolorCursor(xw.dpy, cursor,
3067 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3068 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3069
3070 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3071 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3072 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3073 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3074
3075 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3076 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3077 PropModeReplace, (uchar *)&thispid, 1);
3078
3079 xresettitle();
3080 XMapWindow(xw.dpy, xw.win);
3081 xhints();
3082 XSync(xw.dpy, False);
3083 }
3084
3085 void
3086 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3087 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3088 width = charlen * xw.cw, xp, i;
3089 int frcflags;
3090 int u8fl, u8fblen, u8cblen, doesexist;
3091 char *u8c, *u8fs;
3092 long unicodep;
3093 Font *font = &dc.font;
3094 FcResult fcres;
3095 FcPattern *fcpattern, *fontpattern;
3096 FcFontSet *fcsets[] = { NULL };
3097 FcCharSet *fccharset;
3098 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3099 XRenderColor colfg, colbg;
3100 XRectangle r;
3101 int oneatatime;
3102
3103 frcflags = FRC_NORMAL;
3104
3105 if(base.mode & ATTR_ITALIC) {
3106 if(base.fg == defaultfg)
3107 base.fg = defaultitalic;
3108 font = &dc.ifont;
3109 frcflags = FRC_ITALIC;
3110 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3111 if(base.fg == defaultfg)
3112 base.fg = defaultitalic;
3113 font = &dc.ibfont;
3114 frcflags = FRC_ITALICBOLD;
3115 } else if(base.mode & ATTR_UNDERLINE) {
3116 if(base.fg == defaultfg)
3117 base.fg = defaultunderline;
3118 }
3119
3120 if(IS_TRUECOL(base.fg)) {
3121 colfg.alpha = 0xffff;
3122 colfg.red = TRUERED(base.fg);
3123 colfg.green = TRUEGREEN(base.fg);
3124 colfg.blue = TRUEBLUE(base.fg);
3125 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3126 fg = &truefg;
3127 } else {
3128 fg = &dc.col[base.fg];
3129 }
3130
3131 if(IS_TRUECOL(base.bg)) {
3132 colbg.alpha = 0xffff;
3133 colbg.green = TRUEGREEN(base.bg);
3134 colbg.red = TRUERED(base.bg);
3135 colbg.blue = TRUEBLUE(base.bg);
3136 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3137 bg = &truebg;
3138 } else {
3139 bg = &dc.col[base.bg];
3140 }
3141
3142 if(base.mode & ATTR_BOLD) {
3143 if(BETWEEN(base.fg, 0, 7)) {
3144 /* basic system colors */
3145 fg = &dc.col[base.fg + 8];
3146 } else if(BETWEEN(base.fg, 16, 195)) {
3147 /* 256 colors */
3148 fg = &dc.col[base.fg + 36];
3149 } else if(BETWEEN(base.fg, 232, 251)) {
3150 /* greyscale */
3151 fg = &dc.col[base.fg + 4];
3152 }
3153 /*
3154 * Those ranges will not be brightened:
3155 * 8 - 15 – bright system colors
3156 * 196 - 231 – highest 256 color cube
3157 * 252 - 255 – brightest colors in greyscale
3158 */
3159 font = &dc.bfont;
3160 frcflags = FRC_BOLD;
3161 }
3162
3163 if(IS_SET(MODE_REVERSE)) {
3164 if(fg == &dc.col[defaultfg]) {
3165 fg = &dc.col[defaultbg];
3166 } else {
3167 colfg.red = ~fg->color.red;
3168 colfg.green = ~fg->color.green;
3169 colfg.blue = ~fg->color.blue;
3170 colfg.alpha = fg->color.alpha;
3171 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3172 &revfg);
3173 fg = &revfg;
3174 }
3175
3176 if(bg == &dc.col[defaultbg]) {
3177 bg = &dc.col[defaultfg];
3178 } else {
3179 colbg.red = ~bg->color.red;
3180 colbg.green = ~bg->color.green;
3181 colbg.blue = ~bg->color.blue;
3182 colbg.alpha = bg->color.alpha;
3183 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3184 &revbg);
3185 bg = &revbg;
3186 }
3187 }
3188
3189 if(base.mode & ATTR_REVERSE) {
3190 temp = fg;
3191 fg = bg;
3192 bg = temp;
3193 }
3194
3195 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3196 fg = bg;
3197
3198 /* Intelligent cleaning up of the borders. */
3199 if(x == 0) {
3200 xclear(0, (y == 0)? 0 : winy, borderpx,
3201 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3202 }
3203 if(x + charlen >= term.col) {
3204 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3205 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3206 }
3207 if(y == 0)
3208 xclear(winx, 0, winx + width, borderpx);
3209 if(y == term.row-1)
3210 xclear(winx, winy + xw.ch, winx + width, xw.h);
3211
3212 /* Clean up the region we want to draw to. */
3213 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3214
3215 /* Set the clip region because Xft is sometimes dirty. */
3216 r.x = 0;
3217 r.y = 0;
3218 r.height = xw.ch;
3219 r.width = width;
3220 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3221
3222 for(xp = winx; bytelen > 0;) {
3223 /*
3224 * Search for the range in the to be printed string of glyphs
3225 * that are in the main font. Then print that range. If
3226 * some glyph is found that is not in the font, do the
3227 * fallback dance.
3228 */
3229 u8fs = s;
3230 u8fblen = 0;
3231 u8fl = 0;
3232 oneatatime = font->width != xw.cw;
3233 for(;;) {
3234 u8c = s;
3235 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3236 s += u8cblen;
3237 bytelen -= u8cblen;
3238
3239 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3240 if(oneatatime || !doesexist || bytelen <= 0) {
3241 if(oneatatime || bytelen <= 0) {
3242 if(doesexist) {
3243 u8fl++;
3244 u8fblen += u8cblen;
3245 }
3246 }
3247
3248 if(u8fl > 0) {
3249 XftDrawStringUtf8(xw.draw, fg,
3250 font->match, xp,
3251 winy + font->ascent,
3252 (FcChar8 *)u8fs,
3253 u8fblen);
3254 xp += xw.cw * u8fl;
3255
3256 }
3257 break;
3258 }
3259
3260 u8fl++;
3261 u8fblen += u8cblen;
3262 }
3263 if(doesexist) {
3264 if(oneatatime)
3265 continue;
3266 break;
3267 }
3268
3269 /* Search the font cache. */
3270 for(i = 0; i < frclen; i++) {
3271 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3272 && frc[i].flags == frcflags) {
3273 break;
3274 }
3275 }
3276
3277 /* Nothing was found. */
3278 if(i >= frclen) {
3279 if(!font->set)
3280 xloadfontset(font);
3281 fcsets[0] = font->set;
3282
3283 /*
3284 * Nothing was found in the cache. Now use
3285 * some dozen of Fontconfig calls to get the
3286 * font for one single character.
3287 *
3288 * Xft and fontconfig are design failures.
3289 */
3290 fcpattern = FcPatternDuplicate(font->pattern);
3291 fccharset = FcCharSetCreate();
3292
3293 FcCharSetAddChar(fccharset, unicodep);
3294 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3295 fccharset);
3296 FcPatternAddBool(fcpattern, FC_SCALABLE,
3297 FcTrue);
3298
3299 FcConfigSubstitute(0, fcpattern,
3300 FcMatchPattern);
3301 FcDefaultSubstitute(fcpattern);
3302
3303 fontpattern = FcFontSetMatch(0, fcsets,
3304 FcTrue, fcpattern, &fcres);
3305
3306 /*
3307 * Overwrite or create the new cache entry.
3308 */
3309 if(frclen >= LEN(frc)) {
3310 frclen = LEN(frc) - 1;
3311 XftFontClose(xw.dpy, frc[frclen].font);
3312 }
3313
3314 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3315 fontpattern);
3316 frc[frclen].flags = frcflags;
3317
3318 i = frclen;
3319 frclen++;
3320
3321 FcPatternDestroy(fcpattern);
3322 FcCharSetDestroy(fccharset);
3323 }
3324
3325 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3326 xp, winy + frc[i].font->ascent,
3327 (FcChar8 *)u8c, u8cblen);
3328
3329 xp += xw.cw * wcwidth(unicodep);
3330 }
3331
3332 /*
3333 * This is how the loop above actually should be. Why does the
3334 * application have to care about font details?
3335 *
3336 * I have to repeat: Xft and Fontconfig are design failures.
3337 */
3338 /*
3339 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3340 winy + font->ascent, (FcChar8 *)s, bytelen);
3341 */
3342
3343 if(base.mode & ATTR_UNDERLINE) {
3344 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3345 width, 1);
3346 }
3347
3348 /* Reset clip to none. */
3349 XftDrawSetClip(xw.draw, 0);
3350 }
3351
3352 void
3353 xdrawcursor(void) {
3354 static int oldx = 0, oldy = 0;
3355 int sl, width, curx;
3356 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3357
3358 LIMIT(oldx, 0, term.col-1);
3359 LIMIT(oldy, 0, term.row-1);
3360
3361 curx = term.c.x;
3362
3363 /* adjust position if in dummy */
3364 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3365 oldx--;
3366 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3367 curx--;
3368
3369 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3370
3371 /* remove the old cursor */
3372 sl = utf8len(term.line[oldy][oldx].c);
3373 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3374 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3375 oldy, width, sl);
3376
3377 /* draw the new one */
3378 if(!(IS_SET(MODE_HIDE))) {
3379 if(xw.state & WIN_FOCUSED) {
3380 if(IS_SET(MODE_REVERSE)) {
3381 g.mode |= ATTR_REVERSE;
3382 g.fg = defaultcs;
3383 g.bg = defaultfg;
3384 }
3385
3386 sl = utf8len(g.c);
3387 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3388 ? 2 : 1;
3389 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3390 } else {
3391 XftDrawRect(xw.draw, &dc.col[defaultcs],
3392 borderpx + curx * xw.cw,
3393 borderpx + term.c.y * xw.ch,
3394 xw.cw - 1, 1);
3395 XftDrawRect(xw.draw, &dc.col[defaultcs],
3396 borderpx + curx * xw.cw,
3397 borderpx + term.c.y * xw.ch,
3398 1, xw.ch - 1);
3399 XftDrawRect(xw.draw, &dc.col[defaultcs],
3400 borderpx + (curx + 1) * xw.cw - 1,
3401 borderpx + term.c.y * xw.ch,
3402 1, xw.ch - 1);
3403 XftDrawRect(xw.draw, &dc.col[defaultcs],
3404 borderpx + curx * xw.cw,
3405 borderpx + (term.c.y + 1) * xw.ch - 1,
3406 xw.cw, 1);
3407 }
3408 oldx = curx, oldy = term.c.y;
3409 }
3410 }
3411
3412
3413 void
3414 xsettitle(char *p) {
3415 XTextProperty prop;
3416
3417 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3418 &prop);
3419 XSetWMName(xw.dpy, xw.win, &prop);
3420 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3421 XFree(prop.value);
3422 }
3423
3424 void
3425 xresettitle(void) {
3426 xsettitle(opt_title ? opt_title : "st");
3427 }
3428
3429 void
3430 redraw(int timeout) {
3431 struct timespec tv = {0, timeout * 1000};
3432
3433 draw();
3434
3435 if(timeout > 0) {
3436 nanosleep(&tv, NULL);
3437 XSync(xw.dpy, False); /* necessary for a good tput flash */
3438 }
3439 }
3440
3441 void
3442 draw(void) {
3443 drawregion(0, 0, term.col, term.row);
3444 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3445 xw.h, 0, 0);
3446 XSetForeground(xw.dpy, dc.gc,
3447 dc.col[IS_SET(MODE_REVERSE)?
3448 defaultfg : defaultbg].pixel);
3449 }
3450
3451 void
3452 drawregion(int x1, int y1, int x2, int y2) {
3453 int ic, ib, x, y, ox, sl;
3454 Glyph base, new;
3455 char buf[DRAW_BUF_SIZ];
3456 bool ena_sel = sel.ob.x != -1;
3457 long unicodep;
3458
3459 if(sel.alt != IS_SET(MODE_ALTSCREEN))
3460 ena_sel = 0;
3461
3462 if(!(xw.state & WIN_VISIBLE))
3463 return;
3464
3465 for(y = y1; y < y2; y++) {
3466 if(!term.dirty[y])
3467 continue;
3468
3469 xtermclear(0, y, term.col, y);
3470 term.dirty[y] = 0;
3471 base = term.line[y][0];
3472 ic = ib = ox = 0;
3473 for(x = x1; x < x2; x++) {
3474 new = term.line[y][x];
3475 if(new.mode == ATTR_WDUMMY)
3476 continue;
3477 if(ena_sel && selected(x, y))
3478 new.mode ^= ATTR_REVERSE;
3479 if(ib > 0 && (ATTRCMP(base, new)
3480 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3481 xdraws(buf, base, ox, y, ic, ib);
3482 ic = ib = 0;
3483 }
3484 if(ib == 0) {
3485 ox = x;
3486 base = new;
3487 }
3488
3489 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3490 memcpy(buf+ib, new.c, sl);
3491 ib += sl;
3492 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3493 }
3494 if(ib > 0)
3495 xdraws(buf, base, ox, y, ic, ib);
3496 }
3497 xdrawcursor();
3498 }
3499
3500 void
3501 expose(XEvent *ev) {
3502 XExposeEvent *e = &ev->xexpose;
3503
3504 if(xw.state & WIN_REDRAW) {
3505 if(!e->count)
3506 xw.state &= ~WIN_REDRAW;
3507 }
3508 redraw(0);
3509 }
3510
3511 void
3512 visibility(XEvent *ev) {
3513 XVisibilityEvent *e = &ev->xvisibility;
3514
3515 if(e->state == VisibilityFullyObscured) {
3516 xw.state &= ~WIN_VISIBLE;
3517 } else if(!(xw.state & WIN_VISIBLE)) {
3518 /* need a full redraw for next Expose, not just a buf copy */
3519 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3520 }
3521 }
3522
3523 void
3524 unmap(XEvent *ev) {
3525 xw.state &= ~WIN_VISIBLE;
3526 }
3527
3528 void
3529 xsetpointermotion(int set) {
3530 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3531 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3532 }
3533
3534 void
3535 xseturgency(int add) {
3536 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3537
3538 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3539 XSetWMHints(xw.dpy, xw.win, h);
3540 XFree(h);
3541 }
3542
3543 void
3544 focus(XEvent *ev) {
3545 XFocusChangeEvent *e = &ev->xfocus;
3546
3547 if(e->mode == NotifyGrab)
3548 return;
3549
3550 if(ev->type == FocusIn) {
3551 XSetICFocus(xw.xic);
3552 xw.state |= WIN_FOCUSED;
3553 xseturgency(0);
3554 if(IS_SET(MODE_FOCUS))
3555 ttywrite("\033[I", 3);
3556 } else {
3557 XUnsetICFocus(xw.xic);
3558 xw.state &= ~WIN_FOCUSED;
3559 if(IS_SET(MODE_FOCUS))
3560 ttywrite("\033[O", 3);
3561 }
3562 }
3563
3564 static inline bool
3565 match(uint mask, uint state) {
3566 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3567 }
3568
3569 void
3570 numlock(const Arg *dummy) {
3571 term.numlock ^= 1;
3572 }
3573
3574 char*
3575 kmap(KeySym k, uint state) {
3576 Key *kp;
3577 int i;
3578
3579 /* Check for mapped keys out of X11 function keys. */
3580 for(i = 0; i < LEN(mappedkeys); i++) {
3581 if(mappedkeys[i] == k)
3582 break;
3583 }
3584 if(i == LEN(mappedkeys)) {
3585 if((k & 0xFFFF) < 0xFD00)
3586 return NULL;
3587 }
3588
3589 for(kp = key; kp < key + LEN(key); kp++) {
3590 if(kp->k != k)
3591 continue;
3592
3593 if(!match(kp->mask, state))
3594 continue;
3595
3596 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3597 continue;
3598 if(term.numlock && kp->appkey == 2)
3599 continue;
3600
3601 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3602 continue;
3603
3604 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3605 continue;
3606
3607 return kp->s;
3608 }
3609
3610 return NULL;
3611 }
3612
3613 void
3614 kpress(XEvent *ev) {
3615 XKeyEvent *e = &ev->xkey;
3616 KeySym ksym;
3617 char buf[32], *customkey;
3618 int len;
3619 long c;
3620 Status status;
3621 Shortcut *bp;
3622
3623 if(IS_SET(MODE_KBDLOCK))
3624 return;
3625
3626 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3627 /* 1. shortcuts */
3628 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3629 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3630 bp->func(&(bp->arg));
3631 return;
3632 }
3633 }
3634
3635 /* 2. custom keys from config.h */
3636 if((customkey = kmap(ksym, e->state))) {
3637 ttysend(customkey, strlen(customkey));
3638 return;
3639 }
3640
3641 /* 3. composed string from input method */
3642 if(len == 0)
3643 return;
3644 if(len == 1 && e->state & Mod1Mask) {
3645 if(IS_SET(MODE_8BIT)) {
3646 if(*buf < 0177) {
3647 c = *buf | 0x80;
3648 len = utf8encode(c, buf, UTF_SIZ);
3649 }
3650 } else {
3651 buf[1] = buf[0];
3652 buf[0] = '\033';
3653 len = 2;
3654 }
3655 }
3656 ttysend(buf, len);
3657 }
3658
3659
3660 void
3661 cmessage(XEvent *e) {
3662 /*
3663 * See xembed specs
3664 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3665 */
3666 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3667 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3668 xw.state |= WIN_FOCUSED;
3669 xseturgency(0);
3670 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3671 xw.state &= ~WIN_FOCUSED;
3672 }
3673 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3674 /* Send SIGHUP to shell */
3675 kill(pid, SIGHUP);
3676 exit(EXIT_SUCCESS);
3677 }
3678 }
3679
3680 void
3681 cresize(int width, int height) {
3682 int col, row;
3683
3684 if(width != 0)
3685 xw.w = width;
3686 if(height != 0)
3687 xw.h = height;
3688
3689 col = (xw.w - 2 * borderpx) / xw.cw;
3690 row = (xw.h - 2 * borderpx) / xw.ch;
3691
3692 tresize(col, row);
3693 xresize(col, row);
3694 ttyresize();
3695 }
3696
3697 void
3698 resize(XEvent *e) {
3699 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3700 return;
3701
3702 cresize(e->xconfigure.width, e->xconfigure.height);
3703 }
3704
3705 void
3706 run(void) {
3707 XEvent ev;
3708 int w = xw.w, h = xw.h;
3709 fd_set rfd;
3710 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3711 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3712
3713 /* Waiting for window mapping */
3714 while(1) {
3715 XNextEvent(xw.dpy, &ev);
3716 if(ev.type == ConfigureNotify) {
3717 w = ev.xconfigure.width;
3718 h = ev.xconfigure.height;
3719 } else if(ev.type == MapNotify) {
3720 break;
3721 }
3722 }
3723
3724 ttynew();
3725 cresize(w, h);
3726
3727 gettimeofday(&last, NULL);
3728 lastblink = last;
3729
3730 for(xev = actionfps;;) {
3731 long deltatime;
3732
3733 FD_ZERO(&rfd);
3734 FD_SET(cmdfd, &rfd);
3735 FD_SET(xfd, &rfd);
3736
3737 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3738 if(errno == EINTR)
3739 continue;
3740 die("select failed: %s\n", strerror(errno));
3741 }
3742 if(FD_ISSET(cmdfd, &rfd)) {
3743 ttyread();
3744 if(blinktimeout) {
3745 blinkset = tattrset(ATTR_BLINK);
3746 if(!blinkset)
3747 MODBIT(term.mode, 0, MODE_BLINK);
3748 }
3749 }
3750
3751 if(FD_ISSET(xfd, &rfd))
3752 xev = actionfps;
3753
3754 gettimeofday(&now, NULL);
3755 drawtimeout.tv_sec = 0;
3756 drawtimeout.tv_usec = (1000/xfps) * 1000;
3757 tv = &drawtimeout;
3758
3759 dodraw = 0;
3760 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3761 tsetdirtattr(ATTR_BLINK);
3762 term.mode ^= MODE_BLINK;
3763 lastblink = now;
3764 dodraw = 1;
3765 }
3766 deltatime = TIMEDIFF(now, last);
3767 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3768 || deltatime < 0) {
3769 dodraw = 1;
3770 last = now;
3771 }
3772
3773 if(dodraw) {
3774 while(XPending(xw.dpy)) {
3775 XNextEvent(xw.dpy, &ev);
3776 if(XFilterEvent(&ev, None))
3777 continue;
3778 if(handler[ev.type])
3779 (handler[ev.type])(&ev);
3780 }
3781
3782 draw();
3783 XFlush(xw.dpy);
3784
3785 if(xev && !FD_ISSET(xfd, &rfd))
3786 xev--;
3787 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3788 if(blinkset) {
3789 if(TIMEDIFF(now, lastblink) \
3790 > blinktimeout) {
3791 drawtimeout.tv_usec = 1;
3792 } else {
3793 drawtimeout.tv_usec = (1000 * \
3794 (blinktimeout - \
3795 TIMEDIFF(now,
3796 lastblink)));
3797 }
3798 } else {
3799 tv = NULL;
3800 }
3801 }
3802 }
3803 }
3804 }
3805
3806 void
3807 usage(void) {
3808 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3809 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3810 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3811 }
3812
3813 int
3814 main(int argc, char *argv[]) {
3815 char *titles;
3816 uint cols = 80, rows = 24;
3817
3818 xw.l = xw.t = 0;
3819 xw.isfixed = False;
3820
3821 ARGBEGIN {
3822 case 'a':
3823 allowaltscreen = false;
3824 break;
3825 case 'c':
3826 opt_class = EARGF(usage());
3827 break;
3828 case 'e':
3829 /* eat all remaining arguments */
3830 if(argc > 1) {
3831 opt_cmd = &argv[1];
3832 if(argv[1] != NULL && opt_title == NULL) {
3833 titles = xstrdup(argv[1]);
3834 opt_title = basename(titles);
3835 }
3836 }
3837 goto run;
3838 case 'f':
3839 opt_font = EARGF(usage());
3840 break;
3841 case 'g':
3842 xw.gm = XParseGeometry(EARGF(usage()),
3843 &xw.l, &xw.t, &cols, &rows);
3844 break;
3845 case 'i':
3846 xw.isfixed = True;
3847 break;
3848 case 'o':
3849 opt_io = EARGF(usage());
3850 break;
3851 case 't':
3852 opt_title = EARGF(usage());
3853 break;
3854 case 'w':
3855 opt_embed = EARGF(usage());
3856 break;
3857 case 'v':
3858 default:
3859 usage();
3860 } ARGEND;
3861
3862 run:
3863 setlocale(LC_CTYPE, "");
3864 XSetLocaleModifiers("");
3865 tnew(cols? cols : 1, rows? rows : 1);
3866 xinit();
3867 selinit();
3868 run();
3869
3870 return 0;
3871 }
3872