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