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Comment fix.
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a)[0])
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
74 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
75 #define IS_SET(flag) ((term.mode & (flag)) != 0)
76 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
77 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
78 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
79
80 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
81 #define IS_TRUECOL(x) (1 << 24 & (x))
82 #define TRUERED(x) (((x) & 0xff0000) >> 8)
83 #define TRUEGREEN(x) (((x) & 0xff00))
84 #define TRUEBLUE(x) (((x) & 0xff) << 8)
85
86
87 #define VT102ID "\033[?6c"
88
89 enum glyph_attribute {
90 ATTR_NULL = 0,
91 ATTR_REVERSE = 1,
92 ATTR_UNDERLINE = 2,
93 ATTR_BOLD = 4,
94 ATTR_GFX = 8,
95 ATTR_ITALIC = 16,
96 ATTR_BLINK = 32,
97 ATTR_WRAP = 64,
98 ATTR_WIDE = 128,
99 ATTR_WDUMMY = 256,
100 };
101
102 enum cursor_movement {
103 CURSOR_SAVE,
104 CURSOR_LOAD
105 };
106
107 enum cursor_state {
108 CURSOR_DEFAULT = 0,
109 CURSOR_WRAPNEXT = 1,
110 CURSOR_ORIGIN = 2
111 };
112
113 enum term_mode {
114 MODE_WRAP = 1,
115 MODE_INSERT = 2,
116 MODE_APPKEYPAD = 4,
117 MODE_ALTSCREEN = 8,
118 MODE_CRLF = 16,
119 MODE_MOUSEBTN = 32,
120 MODE_MOUSEMOTION = 64,
121 MODE_REVERSE = 128,
122 MODE_KBDLOCK = 256,
123 MODE_HIDE = 512,
124 MODE_ECHO = 1024,
125 MODE_APPCURSOR = 2048,
126 MODE_MOUSESGR = 4096,
127 MODE_8BIT = 8192,
128 MODE_BLINK = 16384,
129 MODE_FBLINK = 32768,
130 MODE_FOCUS = 65536,
131 MODE_MOUSEX10 = 131072,
132 MODE_MOUSEMANY = 262144,
133 MODE_BRCKTPASTE = 524288,
134 MODE_PRINT = 1048576,
135 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
136 |MODE_MOUSEMANY,
137 };
138
139 enum charset {
140 CS_GRAPHIC0,
141 CS_GRAPHIC1,
142 CS_UK,
143 CS_USA,
144 CS_MULTI,
145 CS_GER,
146 CS_FIN
147 };
148
149 enum escape_state {
150 ESC_START = 1,
151 ESC_CSI = 2,
152 ESC_STR = 4, /* DSC, OSC, PM, APC */
153 ESC_ALTCHARSET = 8,
154 ESC_STR_END = 16, /* a final string was encountered */
155 ESC_TEST = 32, /* Enter in test mode */
156 };
157
158 enum window_state {
159 WIN_VISIBLE = 1,
160 WIN_REDRAW = 2,
161 WIN_FOCUSED = 4
162 };
163
164 enum selection_type {
165 SEL_REGULAR = 1,
166 SEL_RECTANGULAR = 2
167 };
168
169 enum selection_snap {
170 SNAP_WORD = 1,
171 SNAP_LINE = 2
172 };
173
174 typedef unsigned char uchar;
175 typedef unsigned int uint;
176 typedef unsigned long ulong;
177 typedef unsigned short ushort;
178
179 typedef XftDraw *Draw;
180 typedef XftColor Colour;
181 typedef Colormap Colourmap;
182
183 typedef struct {
184 char c[UTF_SIZ]; /* character code */
185 ushort mode; /* attribute flags */
186 uint32_t fg; /* foreground */
187 uint32_t bg; /* background */
188 } Glyph;
189
190 typedef Glyph *Line;
191
192 typedef struct {
193 Glyph attr; /* current char attributes */
194 int x;
195 int y;
196 char state;
197 } TCursor;
198
199 /* CSI Escape sequence structs */
200 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
201 typedef struct {
202 char buf[ESC_BUF_SIZ]; /* raw string */
203 int len; /* raw string length */
204 char priv;
205 int arg[ESC_ARG_SIZ];
206 int narg; /* nb of args */
207 char mode;
208 } CSIEscape;
209
210 /* STR Escape sequence structs */
211 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
212 typedef struct {
213 char type; /* ESC type ... */
214 char buf[STR_BUF_SIZ]; /* raw string */
215 int len; /* raw string length */
216 char *args[STR_ARG_SIZ];
217 int narg; /* nb of args */
218 } STREscape;
219
220 /* Internal representation of the screen */
221 typedef struct {
222 int row; /* nb row */
223 int col; /* nb col */
224 Line *line; /* screen */
225 Line *alt; /* alternate screen */
226 bool *dirty; /* dirtyness of lines */
227 TCursor c; /* cursor */
228 int top; /* top scroll limit */
229 int bot; /* bottom scroll limit */
230 int mode; /* terminal mode flags */
231 int esc; /* escape state flags */
232 char trantbl[4]; /* charset table translation */
233 int charset; /* current charset */
234 int icharset; /* selected charset for sequence */
235 bool numlock; /* lock numbers in keyboard */
236 bool *tabs;
237 } Term;
238
239 /* Purely graphic info */
240 typedef struct {
241 Display *dpy;
242 Colourmap cmap;
243 Window win;
244 Drawable buf;
245 Atom xembed, wmdeletewin, netwmname, netwmpid;
246 XIM xim;
247 XIC xic;
248 Draw draw;
249 Visual *vis;
250 XSetWindowAttributes attrs;
251 int scr;
252 bool isfixed; /* is fixed geometry? */
253 int l, t; /* left and top offset */
254 int gm; /* geometry mask */
255 int tw, th; /* tty width and height */
256 int w, h; /* window width and height */
257 int ch; /* char height */
258 int cw; /* char width */
259 char state; /* focus, redraw, visible */
260 } XWindow;
261
262 typedef struct {
263 uint b;
264 uint mask;
265 char *s;
266 } Mousekey;
267
268 typedef struct {
269 KeySym k;
270 uint mask;
271 char *s;
272 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
273 signed char appkey; /* application keypad */
274 signed char appcursor; /* application cursor */
275 signed char crlf; /* crlf mode */
276 } Key;
277
278 typedef struct {
279 int mode;
280 int type;
281 int snap;
282 /*
283 * Selection variables:
284 * nb – normalized coordinates of the beginning of the selection
285 * ne – normalized coordinates of the end of the selection
286 * ob – original coordinates of the beginning of the selection
287 * oe – original coordinates of the end of the selection
288 */
289 struct {
290 int x, y;
291 } nb, ne, ob, oe;
292
293 char *clip;
294 Atom xtarget;
295 bool alt;
296 struct timeval tclick1;
297 struct timeval tclick2;
298 } Selection;
299
300 typedef union {
301 int i;
302 uint ui;
303 float f;
304 const void *v;
305 } Arg;
306
307 typedef struct {
308 uint mod;
309 KeySym keysym;
310 void (*func)(const Arg *);
311 const Arg arg;
312 } Shortcut;
313
314 /* function definitions used in config.h */
315 static void clippaste(const Arg *);
316 static void numlock(const Arg *);
317 static void selpaste(const Arg *);
318 static void xzoom(const Arg *);
319 static void printsel(const Arg *);
320 static void printscreen(const Arg *) ;
321 static void toggleprinter(const Arg *);
322
323 /* Config.h for applying patches and the configuration. */
324 #include "config.h"
325
326 /* Font structure */
327 typedef struct {
328 int height;
329 int width;
330 int ascent;
331 int descent;
332 short lbearing;
333 short rbearing;
334 XftFont *match;
335 FcFontSet *set;
336 FcPattern *pattern;
337 } Font;
338
339 /* Drawing Context */
340 typedef struct {
341 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
342 Font font, bfont, ifont, ibfont;
343 GC gc;
344 } DC;
345
346 static void die(const char *, ...);
347 static void draw(void);
348 static void redraw(int);
349 static void drawregion(int, int, int, int);
350 static void execsh(void);
351 static void sigchld(int);
352 static void run(void);
353
354 static void csidump(void);
355 static void csihandle(void);
356 static void csiparse(void);
357 static void csireset(void);
358 static void strdump(void);
359 static void strhandle(void);
360 static void strparse(void);
361 static void strreset(void);
362
363 static int tattrset(int);
364 static void tprinter(char *, size_t);
365 static void tdumpsel(void);
366 static void tdumpline(int);
367 static void tdump(void);
368 static void tclearregion(int, int, int, int);
369 static void tcursor(int);
370 static void tdeletechar(int);
371 static void tdeleteline(int);
372 static void tinsertblank(int);
373 static void tinsertblankline(int);
374 static void tmoveto(int, int);
375 static void tmoveato(int, int);
376 static void tnew(int, int);
377 static void tnewline(int);
378 static void tputtab(int);
379 static void tputc(char *, int);
380 static void treset(void);
381 static int tresize(int, int);
382 static void tscrollup(int, int);
383 static void tscrolldown(int, int);
384 static void tsetattr(int *, int);
385 static void tsetchar(char *, Glyph *, int, int);
386 static void tsetscroll(int, int);
387 static void tswapscreen(void);
388 static void tsetdirt(int, int);
389 static void tsetdirtattr(int);
390 static void tsetmode(bool, bool, int *, int);
391 static void tfulldirt(void);
392 static void techo(char *, int);
393 static int32_t tdefcolor(int *, int *, int);
394 static void tselcs(void);
395 static void tdeftran(char);
396 static inline bool match(uint, uint);
397 static void ttynew(void);
398 static void ttyread(void);
399 static void ttyresize(void);
400 static void ttysend(char *, size_t);
401 static void ttywrite(const char *, size_t);
402
403 static void xdraws(char *, Glyph, int, int, int, int);
404 static void xhints(void);
405 static void xclear(int, int, int, int);
406 static void xdrawcursor(void);
407 static void xinit(void);
408 static void xloadcols(void);
409 static int xsetcolorname(int, const char *);
410 static int xgeommasktogravity(int);
411 static int xloadfont(Font *, FcPattern *);
412 static void xloadfonts(char *, double);
413 static int xloadfontset(Font *);
414 static void xsettitle(char *);
415 static void xresettitle(void);
416 static void xsetpointermotion(int);
417 static void xseturgency(int);
418 static void xsetsel(char *);
419 static void xtermclear(int, int, int, int);
420 static void xunloadfont(Font *);
421 static void xunloadfonts(void);
422 static void xresize(int, int);
423
424 static void expose(XEvent *);
425 static void visibility(XEvent *);
426 static void unmap(XEvent *);
427 static char *kmap(KeySym, uint);
428 static void kpress(XEvent *);
429 static void cmessage(XEvent *);
430 static void cresize(int, int);
431 static void resize(XEvent *);
432 static void focus(XEvent *);
433 static void brelease(XEvent *);
434 static void bpress(XEvent *);
435 static void bmotion(XEvent *);
436 static void selnotify(XEvent *);
437 static void selclear(XEvent *);
438 static void selrequest(XEvent *);
439
440 static void selinit(void);
441 static void selsort(void);
442 static inline bool selected(int, int);
443 static char *getsel(void);
444 static void selcopy(void);
445 static void selscroll(int, int);
446 static void selsnap(int, int *, int *, int);
447
448 static size_t utf8decode(char *, long *, size_t);
449 static long utf8decodebyte(char, size_t *);
450 static size_t utf8encode(long, char *, size_t);
451 static char utf8encodebyte(long, size_t);
452 static size_t utf8len(char *);
453 static size_t utf8validate(long *, size_t);
454
455 static ssize_t xwrite(int, char *, size_t);
456 static void *xmalloc(size_t);
457 static void *xrealloc(void *, size_t);
458 static char *xstrdup(char *);
459
460 static void (*handler[LASTEvent])(XEvent *) = {
461 [KeyPress] = kpress,
462 [ClientMessage] = cmessage,
463 [ConfigureNotify] = resize,
464 [VisibilityNotify] = visibility,
465 [UnmapNotify] = unmap,
466 [Expose] = expose,
467 [FocusIn] = focus,
468 [FocusOut] = focus,
469 [MotionNotify] = bmotion,
470 [ButtonPress] = bpress,
471 [ButtonRelease] = brelease,
472 [SelectionClear] = selclear,
473 [SelectionNotify] = selnotify,
474 [SelectionRequest] = selrequest,
475 };
476
477 /* Globals */
478 static DC dc;
479 static XWindow xw;
480 static Term term;
481 static CSIEscape csiescseq;
482 static STREscape strescseq;
483 static int cmdfd;
484 static pid_t pid;
485 static Selection sel;
486 static int iofd = STDOUT_FILENO;
487 static char **opt_cmd = NULL;
488 static char *opt_io = NULL;
489 static char *opt_title = NULL;
490 static char *opt_embed = NULL;
491 static char *opt_class = NULL;
492 static char *opt_font = NULL;
493 static int oldbutton = 3; /* button event on startup: 3 = release */
494
495 static char *usedfont = NULL;
496 static double usedfontsize = 0;
497
498 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
499 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
500 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
501 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
502
503 /* Font Ring Cache */
504 enum {
505 FRC_NORMAL,
506 FRC_ITALIC,
507 FRC_BOLD,
508 FRC_ITALICBOLD
509 };
510
511 typedef struct {
512 XftFont *font;
513 int flags;
514 } Fontcache;
515
516 /* Fontcache is an array now. A new font will be appended to the array. */
517 static Fontcache frc[16];
518 static int frclen = 0;
519
520 ssize_t
521 xwrite(int fd, char *s, size_t len) {
522 size_t aux = len;
523
524 while(len > 0) {
525 ssize_t r = write(fd, s, len);
526 if(r < 0)
527 return r;
528 len -= r;
529 s += r;
530 }
531 return aux;
532 }
533
534 void *
535 xmalloc(size_t len) {
536 void *p = malloc(len);
537
538 if(!p)
539 die("Out of memory\n");
540
541 return p;
542 }
543
544 void *
545 xrealloc(void *p, size_t len) {
546 if((p = realloc(p, len)) == NULL)
547 die("Out of memory\n");
548
549 return p;
550 }
551
552 char *
553 xstrdup(char *s) {
554 if((s = strdup(s)) == NULL)
555 die("Out of memory\n");
556
557 return s;
558 }
559
560 size_t
561 utf8decode(char *c, long *u, size_t clen) {
562 size_t i, j, len, type;
563 long udecoded;
564
565 *u = UTF_INVALID;
566 if(!clen)
567 return 0;
568 udecoded = utf8decodebyte(c[0], &len);
569 if(!BETWEEN(len, 1, UTF_SIZ))
570 return 1;
571 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
572 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
573 if(type != 0)
574 return j;
575 }
576 if(j < len)
577 return 0;
578 *u = udecoded;
579 utf8validate(u, len);
580 return len;
581 }
582
583 long
584 utf8decodebyte(char c, size_t *i) {
585 for(*i = 0; *i < LEN(utfmask); ++(*i))
586 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
587 return (uchar)c & ~utfmask[*i];
588 return 0;
589 }
590
591 size_t
592 utf8encode(long u, char *c, size_t clen) {
593 size_t len, i;
594
595 len = utf8validate(&u, 0);
596 if(clen < len)
597 return 0;
598 for(i = len - 1; i != 0; --i) {
599 c[i] = utf8encodebyte(u, 0);
600 u >>= 6;
601 }
602 c[0] = utf8encodebyte(u, len);
603 return len;
604 }
605
606 char
607 utf8encodebyte(long u, size_t i) {
608 return utfbyte[i] | (u & ~utfmask[i]);
609 }
610
611 size_t
612 utf8len(char *c) {
613 return utf8decode(c, &(long){0}, UTF_SIZ);
614 }
615
616 size_t
617 utf8validate(long *u, size_t i) {
618 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
619 *u = UTF_INVALID;
620 for(i = 1; *u > utfmax[i]; ++i)
621 ;
622 return i;
623 }
624
625 static void
626 selinit(void) {
627 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
628 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
629 sel.mode = 0;
630 sel.ob.x = -1;
631 sel.clip = NULL;
632 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
633 if(sel.xtarget == None)
634 sel.xtarget = XA_STRING;
635 }
636
637 static int
638 x2col(int x) {
639 x -= borderpx;
640 x /= xw.cw;
641
642 return LIMIT(x, 0, term.col-1);
643 }
644
645 static int
646 y2row(int y) {
647 y -= borderpx;
648 y /= xw.ch;
649
650 return LIMIT(y, 0, term.row-1);
651 }
652
653 static void
654 selsort(void) {
655 if(sel.ob.y == sel.oe.y) {
656 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
657 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
658 } else {
659 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
660 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
661 }
662 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
663 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
664 }
665
666 static inline bool
667 selected(int x, int y) {
668 if(sel.ne.y == y && sel.nb.y == y)
669 return BETWEEN(x, sel.nb.x, sel.ne.x);
670
671 if(sel.type == SEL_RECTANGULAR) {
672 return ((sel.nb.y <= y && y <= sel.ne.y)
673 && (sel.nb.x <= x && x <= sel.ne.x));
674 }
675
676 return ((sel.nb.y < y && y < sel.ne.y)
677 || (y == sel.ne.y && x <= sel.ne.x))
678 || (y == sel.nb.y && x >= sel.nb.x
679 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
680 }
681
682 void
683 selsnap(int mode, int *x, int *y, int direction) {
684 int i;
685
686 switch(mode) {
687 case SNAP_WORD:
688 /*
689 * Snap around if the word wraps around at the end or
690 * beginning of a line.
691 */
692 for(;;) {
693 if(direction < 0 && *x <= 0) {
694 if(*y > 0 && term.line[*y - 1][term.col-1].mode
695 & ATTR_WRAP) {
696 *y -= 1;
697 *x = term.col-1;
698 } else {
699 break;
700 }
701 }
702 if(direction > 0 && *x >= term.col-1) {
703 if(*y < term.row-1 && term.line[*y][*x].mode
704 & ATTR_WRAP) {
705 *y += 1;
706 *x = 0;
707 } else {
708 break;
709 }
710 }
711
712 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
713 *x += direction;
714 continue;
715 }
716
717 if(strchr(worddelimiters,
718 term.line[*y][*x+direction].c[0])) {
719 break;
720 }
721
722 *x += direction;
723 }
724 break;
725 case SNAP_LINE:
726 /*
727 * Snap around if the the previous line or the current one
728 * has set ATTR_WRAP at its end. Then the whole next or
729 * previous line will be selected.
730 */
731 *x = (direction < 0) ? 0 : term.col - 1;
732 if(direction < 0 && *y > 0) {
733 for(; *y > 0; *y += direction) {
734 if(!(term.line[*y-1][term.col-1].mode
735 & ATTR_WRAP)) {
736 break;
737 }
738 }
739 } else if(direction > 0 && *y < term.row-1) {
740 for(; *y < term.row; *y += direction) {
741 if(!(term.line[*y][term.col-1].mode
742 & ATTR_WRAP)) {
743 break;
744 }
745 }
746 }
747 break;
748 default:
749 /*
750 * Select the whole line when the end of line is reached.
751 */
752 if(direction > 0) {
753 i = term.col;
754 while(--i > 0 && term.line[*y][i].c[0] == ' ')
755 /* nothing */;
756 if(i > 0 && i < *x)
757 *x = term.col - 1;
758 }
759 break;
760 }
761 }
762
763 void
764 getbuttoninfo(XEvent *e) {
765 int type;
766 uint state = e->xbutton.state &~Button1Mask;
767
768 sel.alt = IS_SET(MODE_ALTSCREEN);
769
770 sel.oe.x = x2col(e->xbutton.x);
771 sel.oe.y = y2row(e->xbutton.y);
772
773 if(sel.ob.y < sel.oe.y
774 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
775 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
776 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
777 } else {
778 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
779 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
780 }
781 selsort();
782
783 sel.type = SEL_REGULAR;
784 for(type = 1; type < LEN(selmasks); ++type) {
785 if(match(selmasks[type], state)) {
786 sel.type = type;
787 break;
788 }
789 }
790 }
791
792 void
793 mousereport(XEvent *e) {
794 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
795 button = e->xbutton.button, state = e->xbutton.state,
796 len;
797 char buf[40];
798 static int ox, oy;
799
800 /* from urxvt */
801 if(e->xbutton.type == MotionNotify) {
802 if(x == ox && y == oy)
803 return;
804 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
805 return;
806 /* MOUSE_MOTION: no reporting if no button is pressed */
807 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
808 return;
809
810 button = oldbutton + 32;
811 ox = x;
812 oy = y;
813 } else {
814 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
815 button = 3;
816 } else {
817 button -= Button1;
818 if(button >= 3)
819 button += 64 - 3;
820 }
821 if(e->xbutton.type == ButtonPress) {
822 oldbutton = button;
823 ox = x;
824 oy = y;
825 } else if(e->xbutton.type == ButtonRelease) {
826 oldbutton = 3;
827 /* MODE_MOUSEX10: no button release reporting */
828 if(IS_SET(MODE_MOUSEX10))
829 return;
830 }
831 }
832
833 if(!IS_SET(MODE_MOUSEX10)) {
834 button += (state & ShiftMask ? 4 : 0)
835 + (state & Mod4Mask ? 8 : 0)
836 + (state & ControlMask ? 16 : 0);
837 }
838
839 len = 0;
840 if(IS_SET(MODE_MOUSESGR)) {
841 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
842 button, x+1, y+1,
843 e->xbutton.type == ButtonRelease ? 'm' : 'M');
844 } else if(x < 223 && y < 223) {
845 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
846 32+button, 32+x+1, 32+y+1);
847 } else {
848 return;
849 }
850
851 ttywrite(buf, len);
852 }
853
854 void
855 bpress(XEvent *e) {
856 struct timeval now;
857 Mousekey *mk;
858
859 if(IS_SET(MODE_MOUSE)) {
860 mousereport(e);
861 return;
862 }
863
864 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
865 if(e->xbutton.button == mk->b
866 && match(mk->mask, e->xbutton.state)) {
867 ttysend(mk->s, strlen(mk->s));
868 return;
869 }
870 }
871
872 if(e->xbutton.button == Button1) {
873 gettimeofday(&now, NULL);
874
875 /* Clear previous selection, logically and visually. */
876 selclear(NULL);
877 sel.mode = 1;
878 sel.type = SEL_REGULAR;
879 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
880 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
881
882 /*
883 * If the user clicks below predefined timeouts specific
884 * snapping behaviour is exposed.
885 */
886 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
887 sel.snap = SNAP_LINE;
888 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
889 sel.snap = SNAP_WORD;
890 } else {
891 sel.snap = 0;
892 }
893 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
894 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
895 selsort();
896
897 /*
898 * Draw selection, unless it's regular and we don't want to
899 * make clicks visible
900 */
901 if(sel.snap != 0) {
902 sel.mode++;
903 tsetdirt(sel.nb.y, sel.ne.y);
904 }
905 sel.tclick2 = sel.tclick1;
906 sel.tclick1 = now;
907 }
908 }
909
910 char *
911 getsel(void) {
912 char *str, *ptr;
913 int x, y, bufsize, size, i, ex;
914 Glyph *gp, *last;
915
916 if(sel.ob.x == -1) {
917 str = NULL;
918 } else {
919 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
920 ptr = str = xmalloc(bufsize);
921
922 /* append every set & selected glyph to the selection */
923 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
924 gp = &term.line[y][0];
925 last = &gp[term.col-1];
926
927 while(last >= gp && !(selected(last - gp, y) &&
928 strcmp(last->c, " ") != 0)) {
929 --last;
930 }
931
932 for(x = 0; gp <= last; x++, ++gp) {
933 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
934 continue;
935
936 size = utf8len(gp->c);
937 memcpy(ptr, gp->c, size);
938 ptr += size;
939 }
940
941 /*
942 * Copy and pasting of line endings is inconsistent
943 * in the inconsistent terminal and GUI world.
944 * The best solution seems like to produce '\n' when
945 * something is copied from st and convert '\n' to
946 * '\r', when something to be pasted is received by
947 * st.
948 * FIXME: Fix the computer world.
949 */
950 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
951 *ptr++ = '\n';
952
953 /*
954 * If the last selected line expands in the selection
955 * after the visible text '\n' is appended.
956 */
957 if(y == sel.ne.y) {
958 i = term.col;
959 while(--i > 0 && term.line[y][i].c[0] == ' ')
960 /* nothing */;
961 ex = sel.ne.x;
962 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
963 ex = sel.nb.x;
964 if(i < ex)
965 *ptr++ = '\n';
966 }
967 }
968 *ptr = 0;
969 }
970 return str;
971 }
972
973 void
974 selcopy(void) {
975 xsetsel(getsel());
976 }
977
978 void
979 selnotify(XEvent *e) {
980 ulong nitems, ofs, rem;
981 int format;
982 uchar *data, *last, *repl;
983 Atom type;
984
985 ofs = 0;
986 do {
987 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
988 False, AnyPropertyType, &type, &format,
989 &nitems, &rem, &data)) {
990 fprintf(stderr, "Clipboard allocation failed\n");
991 return;
992 }
993
994 /*
995 * As seen in getsel:
996 * Line endings are inconsistent in the terminal and GUI world
997 * copy and pasting. When receiving some selection data,
998 * replace all '\n' with '\r'.
999 * FIXME: Fix the computer world.
1000 */
1001 repl = data;
1002 last = data + nitems * format / 8;
1003 while((repl = memchr(repl, '\n', last - repl))) {
1004 *repl++ = '\r';
1005 }
1006
1007 if(IS_SET(MODE_BRCKTPASTE))
1008 ttywrite("\033[200~", 6);
1009 ttysend((char *)data, nitems * format / 8);
1010 if(IS_SET(MODE_BRCKTPASTE))
1011 ttywrite("\033[201~", 6);
1012 XFree(data);
1013 /* number of 32-bit chunks returned */
1014 ofs += nitems * format / 32;
1015 } while(rem > 0);
1016 }
1017
1018 void
1019 selpaste(const Arg *dummy) {
1020 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1021 xw.win, CurrentTime);
1022 }
1023
1024 void
1025 clippaste(const Arg *dummy) {
1026 Atom clipboard;
1027
1028 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1029 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1030 xw.win, CurrentTime);
1031 }
1032
1033 void
1034 selclear(XEvent *e) {
1035 if(sel.ob.x == -1)
1036 return;
1037 sel.ob.x = -1;
1038 tsetdirt(sel.nb.y, sel.ne.y);
1039 }
1040
1041 void
1042 selrequest(XEvent *e) {
1043 XSelectionRequestEvent *xsre;
1044 XSelectionEvent xev;
1045 Atom xa_targets, string;
1046
1047 xsre = (XSelectionRequestEvent *) e;
1048 xev.type = SelectionNotify;
1049 xev.requestor = xsre->requestor;
1050 xev.selection = xsre->selection;
1051 xev.target = xsre->target;
1052 xev.time = xsre->time;
1053 /* reject */
1054 xev.property = None;
1055
1056 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1057 if(xsre->target == xa_targets) {
1058 /* respond with the supported type */
1059 string = sel.xtarget;
1060 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1061 XA_ATOM, 32, PropModeReplace,
1062 (uchar *) &string, 1);
1063 xev.property = xsre->property;
1064 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1065 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1066 xsre->target, 8, PropModeReplace,
1067 (uchar *) sel.clip, strlen(sel.clip));
1068 xev.property = xsre->property;
1069 }
1070
1071 /* all done, send a notification to the listener */
1072 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1073 fprintf(stderr, "Error sending SelectionNotify event\n");
1074 }
1075
1076 void
1077 xsetsel(char *str) {
1078 /* register the selection for both the clipboard and the primary */
1079 Atom clipboard;
1080
1081 free(sel.clip);
1082 sel.clip = str;
1083
1084 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1085
1086 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1087 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1088 }
1089
1090 void
1091 brelease(XEvent *e) {
1092 if(IS_SET(MODE_MOUSE)) {
1093 mousereport(e);
1094 return;
1095 }
1096
1097 if(e->xbutton.button == Button2) {
1098 selpaste(NULL);
1099 } else if(e->xbutton.button == Button1) {
1100 if(sel.mode < 2) {
1101 selclear(NULL);
1102 } else {
1103 getbuttoninfo(e);
1104 selcopy();
1105 }
1106 sel.mode = 0;
1107 tsetdirt(sel.nb.y, sel.ne.y);
1108 }
1109 }
1110
1111 void
1112 bmotion(XEvent *e) {
1113 int oldey, oldex, oldsby, oldsey;
1114
1115 if(IS_SET(MODE_MOUSE)) {
1116 mousereport(e);
1117 return;
1118 }
1119
1120 if(!sel.mode)
1121 return;
1122
1123 sel.mode++;
1124 oldey = sel.oe.y;
1125 oldex = sel.oe.x;
1126 oldsby = sel.nb.y;
1127 oldsey = sel.ne.y;
1128 getbuttoninfo(e);
1129
1130 if(oldey != sel.oe.y || oldex != sel.oe.x)
1131 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1132 }
1133
1134 void
1135 die(const char *errstr, ...) {
1136 va_list ap;
1137
1138 va_start(ap, errstr);
1139 vfprintf(stderr, errstr, ap);
1140 va_end(ap);
1141 exit(EXIT_FAILURE);
1142 }
1143
1144 void
1145 execsh(void) {
1146 char **args;
1147 char *envshell = getenv("SHELL");
1148 const struct passwd *pass = getpwuid(getuid());
1149 char buf[sizeof(long) * 8 + 1];
1150
1151 unsetenv("COLUMNS");
1152 unsetenv("LINES");
1153 unsetenv("TERMCAP");
1154
1155 if(pass) {
1156 setenv("LOGNAME", pass->pw_name, 1);
1157 setenv("USER", pass->pw_name, 1);
1158 setenv("SHELL", pass->pw_shell, 0);
1159 setenv("HOME", pass->pw_dir, 0);
1160 }
1161
1162 snprintf(buf, sizeof(buf), "%lu", xw.win);
1163 setenv("WINDOWID", buf, 1);
1164
1165 signal(SIGCHLD, SIG_DFL);
1166 signal(SIGHUP, SIG_DFL);
1167 signal(SIGINT, SIG_DFL);
1168 signal(SIGQUIT, SIG_DFL);
1169 signal(SIGTERM, SIG_DFL);
1170 signal(SIGALRM, SIG_DFL);
1171
1172 DEFAULT(envshell, shell);
1173 setenv("TERM", termname, 1);
1174 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1175 execvp(args[0], args);
1176 exit(EXIT_FAILURE);
1177 }
1178
1179 void
1180 sigchld(int a) {
1181 int stat = 0;
1182
1183 if(waitpid(pid, &stat, 0) < 0)
1184 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1185
1186 if(WIFEXITED(stat)) {
1187 exit(WEXITSTATUS(stat));
1188 } else {
1189 exit(EXIT_FAILURE);
1190 }
1191 }
1192
1193 void
1194 ttynew(void) {
1195 int m, s;
1196 struct winsize w = {term.row, term.col, 0, 0};
1197
1198 /* seems to work fine on linux, openbsd and freebsd */
1199 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1200 die("openpty failed: %s\n", strerror(errno));
1201
1202 switch(pid = fork()) {
1203 case -1:
1204 die("fork failed\n");
1205 break;
1206 case 0:
1207 setsid(); /* create a new process group */
1208 dup2(s, STDIN_FILENO);
1209 dup2(s, STDOUT_FILENO);
1210 dup2(s, STDERR_FILENO);
1211 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1212 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1213 close(s);
1214 close(m);
1215 execsh();
1216 break;
1217 default:
1218 close(s);
1219 cmdfd = m;
1220 signal(SIGCHLD, sigchld);
1221 if(opt_io) {
1222 term.mode |= MODE_PRINT;
1223 iofd = (!strcmp(opt_io, "-")) ?
1224 STDOUT_FILENO :
1225 open(opt_io, O_WRONLY | O_CREAT, 0666);
1226 if(iofd < 0) {
1227 fprintf(stderr, "Error opening %s:%s\n",
1228 opt_io, strerror(errno));
1229 }
1230 }
1231 }
1232 }
1233
1234 void
1235 dump(char c) {
1236 static int col;
1237
1238 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1239 if(++col % 10 == 0)
1240 fprintf(stderr, "\n");
1241 }
1242
1243 void
1244 ttyread(void) {
1245 static char buf[BUFSIZ];
1246 static int buflen = 0;
1247 char *ptr;
1248 char s[UTF_SIZ];
1249 int charsize; /* size of utf8 char in bytes */
1250 long unicodep;
1251 int ret;
1252
1253 /* append read bytes to unprocessed bytes */
1254 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1255 die("Couldn't read from shell: %s\n", strerror(errno));
1256
1257 /* process every complete utf8 char */
1258 buflen += ret;
1259 ptr = buf;
1260 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1261 utf8encode(unicodep, s, UTF_SIZ);
1262 tputc(s, charsize);
1263 ptr += charsize;
1264 buflen -= charsize;
1265 }
1266
1267 /* keep any uncomplete utf8 char for the next call */
1268 memmove(buf, ptr, buflen);
1269 }
1270
1271 void
1272 ttywrite(const char *s, size_t n) {
1273 if(write(cmdfd, s, n) == -1)
1274 die("write error on tty: %s\n", strerror(errno));
1275 }
1276
1277 void
1278 ttysend(char *s, size_t n) {
1279 ttywrite(s, n);
1280 if(IS_SET(MODE_ECHO))
1281 techo(s, n);
1282 }
1283
1284 void
1285 ttyresize(void) {
1286 struct winsize w;
1287
1288 w.ws_row = term.row;
1289 w.ws_col = term.col;
1290 w.ws_xpixel = xw.tw;
1291 w.ws_ypixel = xw.th;
1292 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1293 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1294 }
1295
1296 int
1297 tattrset(int attr) {
1298 int i, j;
1299
1300 for(i = 0; i < term.row-1; i++) {
1301 for(j = 0; j < term.col-1; j++) {
1302 if(term.line[i][j].mode & attr)
1303 return 1;
1304 }
1305 }
1306
1307 return 0;
1308 }
1309
1310 void
1311 tsetdirt(int top, int bot) {
1312 int i;
1313
1314 LIMIT(top, 0, term.row-1);
1315 LIMIT(bot, 0, term.row-1);
1316
1317 for(i = top; i <= bot; i++)
1318 term.dirty[i] = 1;
1319 }
1320
1321 void
1322 tsetdirtattr(int attr) {
1323 int i, j;
1324
1325 for(i = 0; i < term.row-1; i++) {
1326 for(j = 0; j < term.col-1; j++) {
1327 if(term.line[i][j].mode & attr) {
1328 tsetdirt(i, i);
1329 break;
1330 }
1331 }
1332 }
1333 }
1334
1335 void
1336 tfulldirt(void) {
1337 tsetdirt(0, term.row-1);
1338 }
1339
1340 void
1341 tcursor(int mode) {
1342 static TCursor c[2];
1343 bool alt = IS_SET(MODE_ALTSCREEN);
1344
1345 if(mode == CURSOR_SAVE) {
1346 c[alt] = term.c;
1347 } else if(mode == CURSOR_LOAD) {
1348 term.c = c[alt];
1349 tmoveto(c[alt].x, c[alt].y);
1350 }
1351 }
1352
1353 void
1354 treset(void) {
1355 uint i;
1356
1357 term.c = (TCursor){{
1358 .mode = ATTR_NULL,
1359 .fg = defaultfg,
1360 .bg = defaultbg
1361 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1362
1363 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1364 for(i = tabspaces; i < term.col; i += tabspaces)
1365 term.tabs[i] = 1;
1366 term.top = 0;
1367 term.bot = term.row - 1;
1368 term.mode = MODE_WRAP;
1369 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1370 term.charset = 0;
1371
1372 tclearregion(0, 0, term.col-1, term.row-1);
1373 tmoveto(0, 0);
1374 tcursor(CURSOR_SAVE);
1375 }
1376
1377 void
1378 tnew(int col, int row) {
1379 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1380 tresize(col, row);
1381 term.numlock = 1;
1382
1383 treset();
1384 }
1385
1386 void
1387 tswapscreen(void) {
1388 Line *tmp = term.line;
1389
1390 term.line = term.alt;
1391 term.alt = tmp;
1392 term.mode ^= MODE_ALTSCREEN;
1393 tfulldirt();
1394 }
1395
1396 void
1397 tscrolldown(int orig, int n) {
1398 int i;
1399 Line temp;
1400
1401 LIMIT(n, 0, term.bot-orig+1);
1402
1403 tsetdirt(orig, term.bot-n);
1404 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1405
1406 for(i = term.bot; i >= orig+n; i--) {
1407 temp = term.line[i];
1408 term.line[i] = term.line[i-n];
1409 term.line[i-n] = temp;
1410 }
1411
1412 selscroll(orig, n);
1413 }
1414
1415 void
1416 tscrollup(int orig, int n) {
1417 int i;
1418 Line temp;
1419
1420 LIMIT(n, 0, term.bot-orig+1);
1421
1422 tclearregion(0, orig, term.col-1, orig+n-1);
1423 tsetdirt(orig+n, term.bot);
1424
1425 for(i = orig; i <= term.bot-n; i++) {
1426 temp = term.line[i];
1427 term.line[i] = term.line[i+n];
1428 term.line[i+n] = temp;
1429 }
1430
1431 selscroll(orig, -n);
1432 }
1433
1434 void
1435 selscroll(int orig, int n) {
1436 if(sel.ob.x == -1)
1437 return;
1438
1439 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1440 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1441 selclear(NULL);
1442 return;
1443 }
1444 if(sel.type == SEL_RECTANGULAR) {
1445 if(sel.ob.y < term.top)
1446 sel.ob.y = term.top;
1447 if(sel.oe.y > term.bot)
1448 sel.oe.y = term.bot;
1449 } else {
1450 if(sel.ob.y < term.top) {
1451 sel.ob.y = term.top;
1452 sel.ob.x = 0;
1453 }
1454 if(sel.oe.y > term.bot) {
1455 sel.oe.y = term.bot;
1456 sel.oe.x = term.col;
1457 }
1458 }
1459 selsort();
1460 }
1461 }
1462
1463 void
1464 tnewline(int first_col) {
1465 int y = term.c.y;
1466
1467 if(y == term.bot) {
1468 tscrollup(term.top, 1);
1469 } else {
1470 y++;
1471 }
1472 tmoveto(first_col ? 0 : term.c.x, y);
1473 }
1474
1475 void
1476 csiparse(void) {
1477 char *p = csiescseq.buf, *np;
1478 long int v;
1479
1480 csiescseq.narg = 0;
1481 if(*p == '?') {
1482 csiescseq.priv = 1;
1483 p++;
1484 }
1485
1486 csiescseq.buf[csiescseq.len] = '\0';
1487 while(p < csiescseq.buf+csiescseq.len) {
1488 np = NULL;
1489 v = strtol(p, &np, 10);
1490 if(np == p)
1491 v = 0;
1492 if(v == LONG_MAX || v == LONG_MIN)
1493 v = -1;
1494 csiescseq.arg[csiescseq.narg++] = v;
1495 p = np;
1496 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1497 break;
1498 p++;
1499 }
1500 csiescseq.mode = *p;
1501 }
1502
1503 /* for absolute user moves, when decom is set */
1504 void
1505 tmoveato(int x, int y) {
1506 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1507 }
1508
1509 void
1510 tmoveto(int x, int y) {
1511 int miny, maxy;
1512
1513 if(term.c.state & CURSOR_ORIGIN) {
1514 miny = term.top;
1515 maxy = term.bot;
1516 } else {
1517 miny = 0;
1518 maxy = term.row - 1;
1519 }
1520 LIMIT(x, 0, term.col-1);
1521 LIMIT(y, miny, maxy);
1522 term.c.state &= ~CURSOR_WRAPNEXT;
1523 term.c.x = x;
1524 term.c.y = y;
1525 }
1526
1527 void
1528 tsetchar(char *c, Glyph *attr, int x, int y) {
1529 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1530 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1531 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1532 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1533 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1534 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1535 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1536 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1537 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1538 };
1539
1540 /*
1541 * The table is proudly stolen from rxvt.
1542 */
1543 if(attr->mode & ATTR_GFX) {
1544 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1545 c = vt100_0[c[0] - 0x41];
1546 }
1547 }
1548
1549 if(term.line[y][x].mode & ATTR_WIDE) {
1550 if(x+1 < term.col) {
1551 term.line[y][x+1].c[0] = ' ';
1552 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1553 }
1554 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1555 term.line[y][x-1].c[0] = ' ';
1556 term.line[y][x-1].mode &= ~ATTR_WIDE;
1557 }
1558
1559 term.dirty[y] = 1;
1560 term.line[y][x] = *attr;
1561 memcpy(term.line[y][x].c, c, UTF_SIZ);
1562 }
1563
1564 void
1565 tclearregion(int x1, int y1, int x2, int y2) {
1566 int x, y, temp;
1567
1568 if(x1 > x2)
1569 temp = x1, x1 = x2, x2 = temp;
1570 if(y1 > y2)
1571 temp = y1, y1 = y2, y2 = temp;
1572
1573 LIMIT(x1, 0, term.col-1);
1574 LIMIT(x2, 0, term.col-1);
1575 LIMIT(y1, 0, term.row-1);
1576 LIMIT(y2, 0, term.row-1);
1577
1578 for(y = y1; y <= y2; y++) {
1579 term.dirty[y] = 1;
1580 for(x = x1; x <= x2; x++) {
1581 if(selected(x, y))
1582 selclear(NULL);
1583 term.line[y][x] = term.c.attr;
1584 memcpy(term.line[y][x].c, " ", 2);
1585 }
1586 }
1587 }
1588
1589 void
1590 tdeletechar(int n) {
1591 int dst, src, size;
1592 Glyph *line;
1593
1594 LIMIT(n, 0, term.col - term.c.x);
1595
1596 dst = term.c.x;
1597 src = term.c.x + n;
1598 size = term.col - src;
1599 line = term.line[term.c.y];
1600
1601 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1602 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1603 }
1604
1605 void
1606 tinsertblank(int n) {
1607 int dst, src, size;
1608 Glyph *line;
1609
1610 LIMIT(n, 0, term.col - term.c.x);
1611
1612 dst = term.c.x + n;
1613 src = term.c.x;
1614 size = term.col - dst;
1615 line = term.line[term.c.y];
1616
1617 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1618 tclearregion(src, term.c.y, dst - 1, term.c.y);
1619 }
1620
1621 void
1622 tinsertblankline(int n) {
1623 if(BETWEEN(term.c.y, term.top, term.bot))
1624 tscrolldown(term.c.y, n);
1625 }
1626
1627 void
1628 tdeleteline(int n) {
1629 if(BETWEEN(term.c.y, term.top, term.bot))
1630 tscrollup(term.c.y, n);
1631 }
1632
1633 int32_t
1634 tdefcolor(int *attr, int *npar, int l) {
1635 int32_t idx = -1;
1636 uint r, g, b;
1637
1638 switch (attr[*npar + 1]) {
1639 case 2: /* direct colour in RGB space */
1640 if (*npar + 4 >= l) {
1641 fprintf(stderr,
1642 "erresc(38): Incorrect number of parameters (%d)\n",
1643 *npar);
1644 break;
1645 }
1646 r = attr[*npar + 2];
1647 g = attr[*npar + 3];
1648 b = attr[*npar + 4];
1649 *npar += 4;
1650 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1651 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1652 r, g, b);
1653 else
1654 idx = TRUECOLOR(r, g, b);
1655 break;
1656 case 5: /* indexed colour */
1657 if (*npar + 2 >= l) {
1658 fprintf(stderr,
1659 "erresc(38): Incorrect number of parameters (%d)\n",
1660 *npar);
1661 break;
1662 }
1663 *npar += 2;
1664 if(!BETWEEN(attr[*npar], 0, 255))
1665 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1666 else
1667 idx = attr[*npar];
1668 break;
1669 case 0: /* implemented defined (only foreground) */
1670 case 1: /* transparent */
1671 case 3: /* direct colour in CMY space */
1672 case 4: /* direct colour in CMYK space */
1673 default:
1674 fprintf(stderr,
1675 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1676 }
1677
1678 return idx;
1679 }
1680
1681 void
1682 tsetattr(int *attr, int l) {
1683 int i;
1684 int32_t idx;
1685
1686 for(i = 0; i < l; i++) {
1687 switch(attr[i]) {
1688 case 0:
1689 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1690 | ATTR_BOLD | ATTR_ITALIC \
1691 | ATTR_BLINK);
1692 term.c.attr.fg = defaultfg;
1693 term.c.attr.bg = defaultbg;
1694 break;
1695 case 1:
1696 term.c.attr.mode |= ATTR_BOLD;
1697 break;
1698 case 3:
1699 term.c.attr.mode |= ATTR_ITALIC;
1700 break;
1701 case 4:
1702 term.c.attr.mode |= ATTR_UNDERLINE;
1703 break;
1704 case 5: /* slow blink */
1705 case 6: /* rapid blink */
1706 term.c.attr.mode |= ATTR_BLINK;
1707 break;
1708 case 7:
1709 term.c.attr.mode |= ATTR_REVERSE;
1710 break;
1711 case 21:
1712 case 22:
1713 term.c.attr.mode &= ~ATTR_BOLD;
1714 break;
1715 case 23:
1716 term.c.attr.mode &= ~ATTR_ITALIC;
1717 break;
1718 case 24:
1719 term.c.attr.mode &= ~ATTR_UNDERLINE;
1720 break;
1721 case 25:
1722 case 26:
1723 term.c.attr.mode &= ~ATTR_BLINK;
1724 break;
1725 case 27:
1726 term.c.attr.mode &= ~ATTR_REVERSE;
1727 break;
1728 case 38:
1729 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1730 term.c.attr.fg = idx;
1731 break;
1732 case 39:
1733 term.c.attr.fg = defaultfg;
1734 break;
1735 case 48:
1736 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1737 term.c.attr.bg = idx;
1738 break;
1739 case 49:
1740 term.c.attr.bg = defaultbg;
1741 break;
1742 default:
1743 if(BETWEEN(attr[i], 30, 37)) {
1744 term.c.attr.fg = attr[i] - 30;
1745 } else if(BETWEEN(attr[i], 40, 47)) {
1746 term.c.attr.bg = attr[i] - 40;
1747 } else if(BETWEEN(attr[i], 90, 97)) {
1748 term.c.attr.fg = attr[i] - 90 + 8;
1749 } else if(BETWEEN(attr[i], 100, 107)) {
1750 term.c.attr.bg = attr[i] - 100 + 8;
1751 } else {
1752 fprintf(stderr,
1753 "erresc(default): gfx attr %d unknown\n",
1754 attr[i]), csidump();
1755 }
1756 break;
1757 }
1758 }
1759 }
1760
1761 void
1762 tsetscroll(int t, int b) {
1763 int temp;
1764
1765 LIMIT(t, 0, term.row-1);
1766 LIMIT(b, 0, term.row-1);
1767 if(t > b) {
1768 temp = t;
1769 t = b;
1770 b = temp;
1771 }
1772 term.top = t;
1773 term.bot = b;
1774 }
1775
1776 void
1777 tsetmode(bool priv, bool set, int *args, int narg) {
1778 int *lim, mode;
1779 bool alt;
1780
1781 for(lim = args + narg; args < lim; ++args) {
1782 if(priv) {
1783 switch(*args) {
1784 break;
1785 case 1: /* DECCKM -- Cursor key */
1786 MODBIT(term.mode, set, MODE_APPCURSOR);
1787 break;
1788 case 5: /* DECSCNM -- Reverse video */
1789 mode = term.mode;
1790 MODBIT(term.mode, set, MODE_REVERSE);
1791 if(mode != term.mode)
1792 redraw(REDRAW_TIMEOUT);
1793 break;
1794 case 6: /* DECOM -- Origin */
1795 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1796 tmoveato(0, 0);
1797 break;
1798 case 7: /* DECAWM -- Auto wrap */
1799 MODBIT(term.mode, set, MODE_WRAP);
1800 break;
1801 case 0: /* Error (IGNORED) */
1802 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1803 case 3: /* DECCOLM -- Column (IGNORED) */
1804 case 4: /* DECSCLM -- Scroll (IGNORED) */
1805 case 8: /* DECARM -- Auto repeat (IGNORED) */
1806 case 18: /* DECPFF -- Printer feed (IGNORED) */
1807 case 19: /* DECPEX -- Printer extent (IGNORED) */
1808 case 42: /* DECNRCM -- National characters (IGNORED) */
1809 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1810 break;
1811 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1812 MODBIT(term.mode, !set, MODE_HIDE);
1813 break;
1814 case 9: /* X10 mouse compatibility mode */
1815 xsetpointermotion(0);
1816 MODBIT(term.mode, 0, MODE_MOUSE);
1817 MODBIT(term.mode, set, MODE_MOUSEX10);
1818 break;
1819 case 1000: /* 1000: report button press */
1820 xsetpointermotion(0);
1821 MODBIT(term.mode, 0, MODE_MOUSE);
1822 MODBIT(term.mode, set, MODE_MOUSEBTN);
1823 break;
1824 case 1002: /* 1002: report motion on button press */
1825 xsetpointermotion(0);
1826 MODBIT(term.mode, 0, MODE_MOUSE);
1827 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1828 break;
1829 case 1003: /* 1003: enable all mouse motions */
1830 xsetpointermotion(set);
1831 MODBIT(term.mode, 0, MODE_MOUSE);
1832 MODBIT(term.mode, set, MODE_MOUSEMANY);
1833 break;
1834 case 1004: /* 1004: send focus events to tty */
1835 MODBIT(term.mode, set, MODE_FOCUS);
1836 break;
1837 case 1006: /* 1006: extended reporting mode */
1838 MODBIT(term.mode, set, MODE_MOUSESGR);
1839 break;
1840 case 1034:
1841 MODBIT(term.mode, set, MODE_8BIT);
1842 break;
1843 case 1049: /* swap screen & set/restore cursor as xterm */
1844 if (!allowaltscreen)
1845 break;
1846 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1847 /* FALLTHRU */
1848 case 47: /* swap screen */
1849 case 1047:
1850 if (!allowaltscreen)
1851 break;
1852 alt = IS_SET(MODE_ALTSCREEN);
1853 if(alt) {
1854 tclearregion(0, 0, term.col-1,
1855 term.row-1);
1856 }
1857 if(set ^ alt) /* set is always 1 or 0 */
1858 tswapscreen();
1859 if(*args != 1049)
1860 break;
1861 /* FALLTRU */
1862 case 1048:
1863 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1864 break;
1865 case 2004: /* 2004: bracketed paste mode */
1866 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1867 break;
1868 /* Not implemented mouse modes. See comments there. */
1869 case 1001: /* mouse highlight mode; can hang the
1870 terminal by design when implemented. */
1871 case 1005: /* UTF-8 mouse mode; will confuse
1872 applications not supporting UTF-8
1873 and luit. */
1874 case 1015: /* urxvt mangled mouse mode; incompatible
1875 and can be mistaken for other control
1876 codes. */
1877 default:
1878 fprintf(stderr,
1879 "erresc: unknown private set/reset mode %d\n",
1880 *args);
1881 break;
1882 }
1883 } else {
1884 switch(*args) {
1885 case 0: /* Error (IGNORED) */
1886 break;
1887 case 2: /* KAM -- keyboard action */
1888 MODBIT(term.mode, set, MODE_KBDLOCK);
1889 break;
1890 case 4: /* IRM -- Insertion-replacement */
1891 MODBIT(term.mode, set, MODE_INSERT);
1892 break;
1893 case 12: /* SRM -- Send/Receive */
1894 MODBIT(term.mode, !set, MODE_ECHO);
1895 break;
1896 case 20: /* LNM -- Linefeed/new line */
1897 MODBIT(term.mode, set, MODE_CRLF);
1898 break;
1899 default:
1900 fprintf(stderr,
1901 "erresc: unknown set/reset mode %d\n",
1902 *args);
1903 break;
1904 }
1905 }
1906 }
1907 }
1908
1909 void
1910 csihandle(void) {
1911 char buf[40];
1912 int len;
1913
1914 switch(csiescseq.mode) {
1915 default:
1916 unknown:
1917 fprintf(stderr, "erresc: unknown csi ");
1918 csidump();
1919 /* die(""); */
1920 break;
1921 case '@': /* ICH -- Insert <n> blank char */
1922 DEFAULT(csiescseq.arg[0], 1);
1923 tinsertblank(csiescseq.arg[0]);
1924 break;
1925 case 'A': /* CUU -- Cursor <n> Up */
1926 DEFAULT(csiescseq.arg[0], 1);
1927 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1928 break;
1929 case 'B': /* CUD -- Cursor <n> Down */
1930 case 'e': /* VPR --Cursor <n> Down */
1931 DEFAULT(csiescseq.arg[0], 1);
1932 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1933 break;
1934 case 'i': /* MC -- Media Copy */
1935 switch(csiescseq.arg[0]) {
1936 case 0:
1937 tdump();
1938 break;
1939 case 1:
1940 tdumpline(term.c.y);
1941 break;
1942 case 2:
1943 tdumpsel();
1944 break;
1945 case 4:
1946 term.mode &= ~MODE_PRINT;
1947 break;
1948 case 5:
1949 term.mode |= MODE_PRINT;
1950 break;
1951 }
1952 break;
1953 case 'c': /* DA -- Device Attributes */
1954 if(csiescseq.arg[0] == 0)
1955 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1956 break;
1957 case 'C': /* CUF -- Cursor <n> Forward */
1958 case 'a': /* HPR -- Cursor <n> Forward */
1959 DEFAULT(csiescseq.arg[0], 1);
1960 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1961 break;
1962 case 'D': /* CUB -- Cursor <n> Backward */
1963 DEFAULT(csiescseq.arg[0], 1);
1964 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1965 break;
1966 case 'E': /* CNL -- Cursor <n> Down and first col */
1967 DEFAULT(csiescseq.arg[0], 1);
1968 tmoveto(0, term.c.y+csiescseq.arg[0]);
1969 break;
1970 case 'F': /* CPL -- Cursor <n> Up and first col */
1971 DEFAULT(csiescseq.arg[0], 1);
1972 tmoveto(0, term.c.y-csiescseq.arg[0]);
1973 break;
1974 case 'g': /* TBC -- Tabulation clear */
1975 switch(csiescseq.arg[0]) {
1976 case 0: /* clear current tab stop */
1977 term.tabs[term.c.x] = 0;
1978 break;
1979 case 3: /* clear all the tabs */
1980 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1981 break;
1982 default:
1983 goto unknown;
1984 }
1985 break;
1986 case 'G': /* CHA -- Move to <col> */
1987 case '`': /* HPA */
1988 DEFAULT(csiescseq.arg[0], 1);
1989 tmoveto(csiescseq.arg[0]-1, term.c.y);
1990 break;
1991 case 'H': /* CUP -- Move to <row> <col> */
1992 case 'f': /* HVP */
1993 DEFAULT(csiescseq.arg[0], 1);
1994 DEFAULT(csiescseq.arg[1], 1);
1995 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1996 break;
1997 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1998 DEFAULT(csiescseq.arg[0], 1);
1999 tputtab(csiescseq.arg[0]);
2000 break;
2001 case 'J': /* ED -- Clear screen */
2002 selclear(NULL);
2003 switch(csiescseq.arg[0]) {
2004 case 0: /* below */
2005 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2006 if(term.c.y < term.row-1) {
2007 tclearregion(0, term.c.y+1, term.col-1,
2008 term.row-1);
2009 }
2010 break;
2011 case 1: /* above */
2012 if(term.c.y > 1)
2013 tclearregion(0, 0, term.col-1, term.c.y-1);
2014 tclearregion(0, term.c.y, term.c.x, term.c.y);
2015 break;
2016 case 2: /* all */
2017 tclearregion(0, 0, term.col-1, term.row-1);
2018 break;
2019 default:
2020 goto unknown;
2021 }
2022 break;
2023 case 'K': /* EL -- Clear line */
2024 switch(csiescseq.arg[0]) {
2025 case 0: /* right */
2026 tclearregion(term.c.x, term.c.y, term.col-1,
2027 term.c.y);
2028 break;
2029 case 1: /* left */
2030 tclearregion(0, term.c.y, term.c.x, term.c.y);
2031 break;
2032 case 2: /* all */
2033 tclearregion(0, term.c.y, term.col-1, term.c.y);
2034 break;
2035 }
2036 break;
2037 case 'S': /* SU -- Scroll <n> line up */
2038 DEFAULT(csiescseq.arg[0], 1);
2039 tscrollup(term.top, csiescseq.arg[0]);
2040 break;
2041 case 'T': /* SD -- Scroll <n> line down */
2042 DEFAULT(csiescseq.arg[0], 1);
2043 tscrolldown(term.top, csiescseq.arg[0]);
2044 break;
2045 case 'L': /* IL -- Insert <n> blank lines */
2046 DEFAULT(csiescseq.arg[0], 1);
2047 tinsertblankline(csiescseq.arg[0]);
2048 break;
2049 case 'l': /* RM -- Reset Mode */
2050 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2051 break;
2052 case 'M': /* DL -- Delete <n> lines */
2053 DEFAULT(csiescseq.arg[0], 1);
2054 tdeleteline(csiescseq.arg[0]);
2055 break;
2056 case 'X': /* ECH -- Erase <n> char */
2057 DEFAULT(csiescseq.arg[0], 1);
2058 tclearregion(term.c.x, term.c.y,
2059 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2060 break;
2061 case 'P': /* DCH -- Delete <n> char */
2062 DEFAULT(csiescseq.arg[0], 1);
2063 tdeletechar(csiescseq.arg[0]);
2064 break;
2065 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2066 DEFAULT(csiescseq.arg[0], 1);
2067 tputtab(-csiescseq.arg[0]);
2068 break;
2069 case 'd': /* VPA -- Move to <row> */
2070 DEFAULT(csiescseq.arg[0], 1);
2071 tmoveato(term.c.x, csiescseq.arg[0]-1);
2072 break;
2073 case 'h': /* SM -- Set terminal mode */
2074 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2075 break;
2076 case 'm': /* SGR -- Terminal attribute (color) */
2077 tsetattr(csiescseq.arg, csiescseq.narg);
2078 break;
2079 case 'n': /* DSR – Device Status Report (cursor position) */
2080 if (csiescseq.arg[0] == 6) {
2081 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2082 term.c.y+1, term.c.x+1);
2083 ttywrite(buf, len);
2084 break;
2085 }
2086 case 'r': /* DECSTBM -- Set Scrolling Region */
2087 if(csiescseq.priv) {
2088 goto unknown;
2089 } else {
2090 DEFAULT(csiescseq.arg[0], 1);
2091 DEFAULT(csiescseq.arg[1], term.row);
2092 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2093 tmoveato(0, 0);
2094 }
2095 break;
2096 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2097 tcursor(CURSOR_SAVE);
2098 break;
2099 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2100 tcursor(CURSOR_LOAD);
2101 break;
2102 }
2103 }
2104
2105 void
2106 csidump(void) {
2107 int i;
2108 uint c;
2109
2110 printf("ESC[");
2111 for(i = 0; i < csiescseq.len; i++) {
2112 c = csiescseq.buf[i] & 0xff;
2113 if(isprint(c)) {
2114 putchar(c);
2115 } else if(c == '\n') {
2116 printf("(\\n)");
2117 } else if(c == '\r') {
2118 printf("(\\r)");
2119 } else if(c == 0x1b) {
2120 printf("(\\e)");
2121 } else {
2122 printf("(%02x)", c);
2123 }
2124 }
2125 putchar('\n');
2126 }
2127
2128 void
2129 csireset(void) {
2130 memset(&csiescseq, 0, sizeof(csiescseq));
2131 }
2132
2133 void
2134 strhandle(void) {
2135 char *p = NULL;
2136 int j, narg, par;
2137
2138 strparse();
2139 narg = strescseq.narg;
2140 par = atoi(strescseq.args[0]);
2141
2142 switch(strescseq.type) {
2143 case ']': /* OSC -- Operating System Command */
2144 switch(par) {
2145 case 0:
2146 case 1:
2147 case 2:
2148 if(narg > 1)
2149 xsettitle(strescseq.args[1]);
2150 return;
2151 case 4: /* color set */
2152 if(narg < 3)
2153 break;
2154 p = strescseq.args[2];
2155 /* fall through */
2156 case 104: /* color reset, here p = NULL */
2157 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2158 if (!xsetcolorname(j, p)) {
2159 fprintf(stderr, "erresc: invalid color %s\n", p);
2160 } else {
2161 /*
2162 * TODO if defaultbg color is changed, borders
2163 * are dirty
2164 */
2165 redraw(0);
2166 }
2167 return;
2168 }
2169 break;
2170 case 'k': /* old title set compatibility */
2171 xsettitle(strescseq.args[0]);
2172 return;
2173 case 'P': /* DSC -- Device Control String */
2174 case '_': /* APC -- Application Program Command */
2175 case '^': /* PM -- Privacy Message */
2176 return;
2177 }
2178
2179 fprintf(stderr, "erresc: unknown str ");
2180 strdump();
2181 }
2182
2183 void
2184 strparse(void) {
2185 char *p = strescseq.buf;
2186
2187 strescseq.narg = 0;
2188 strescseq.buf[strescseq.len] = '\0';
2189 while(p && strescseq.narg < STR_ARG_SIZ)
2190 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2191 }
2192
2193 void
2194 strdump(void) {
2195 int i;
2196 uint c;
2197
2198 printf("ESC%c", strescseq.type);
2199 for(i = 0; i < strescseq.len; i++) {
2200 c = strescseq.buf[i] & 0xff;
2201 if(c == '\0') {
2202 return;
2203 } else if(isprint(c)) {
2204 putchar(c);
2205 } else if(c == '\n') {
2206 printf("(\\n)");
2207 } else if(c == '\r') {
2208 printf("(\\r)");
2209 } else if(c == 0x1b) {
2210 printf("(\\e)");
2211 } else {
2212 printf("(%02x)", c);
2213 }
2214 }
2215 printf("ESC\\\n");
2216 }
2217
2218 void
2219 strreset(void) {
2220 memset(&strescseq, 0, sizeof(strescseq));
2221 }
2222
2223 void
2224 tprinter(char *s, size_t len) {
2225 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2226 fprintf(stderr, "Error writing in %s:%s\n",
2227 opt_io, strerror(errno));
2228 close(iofd);
2229 iofd = -1;
2230 }
2231 }
2232
2233 void
2234 toggleprinter(const Arg *arg) {
2235 term.mode ^= MODE_PRINT;
2236 }
2237
2238 void
2239 printscreen(const Arg *arg) {
2240 tdump();
2241 }
2242
2243 void
2244 printsel(const Arg *arg) {
2245 tdumpsel();
2246 }
2247
2248 void
2249 tdumpsel(void) {
2250 char *ptr;
2251
2252 if((ptr = getsel())) {
2253 tprinter(ptr, strlen(ptr));
2254 free(ptr);
2255 }
2256 }
2257
2258 void
2259 tdumpline(int n) {
2260 Glyph *bp, *end;
2261
2262 bp = &term.line[n][0];
2263 end = &bp[term.col-1];
2264 while(end > bp && !strcmp(" ", end->c))
2265 --end;
2266 if(bp != end || strcmp(bp->c, " ")) {
2267 for( ;bp <= end; ++bp)
2268 tprinter(bp->c, strlen(bp->c));
2269 }
2270 tprinter("\n", 1);
2271 }
2272
2273 void
2274 tdump(void) {
2275 int i;
2276
2277 for(i = 0; i < term.row; ++i)
2278 tdumpline(i);
2279 }
2280
2281 void
2282 tputtab(int n) {
2283 uint x = term.c.x;
2284
2285 if(n > 0) {
2286 while(x < term.col && n--)
2287 for(++x; x < term.col && !term.tabs[x]; ++x)
2288 /* nothing */ ;
2289 } else if(n < 0) {
2290 while(x > 0 && n++)
2291 for(--x; x > 0 && !term.tabs[x]; --x)
2292 /* nothing */ ;
2293 }
2294 tmoveto(x, term.c.y);
2295 }
2296
2297 void
2298 techo(char *buf, int len) {
2299 for(; len > 0; buf++, len--) {
2300 char c = *buf;
2301
2302 if(c < 0x20 || c == 0177) { /* control code */
2303 if(c != '\n' && c != '\r' && c != '\t') {
2304 c ^= '\x40';
2305 tputc("^", 1);
2306 }
2307 tputc(&c, 1);
2308 } else {
2309 break;
2310 }
2311 }
2312 if(len)
2313 tputc(buf, len);
2314 }
2315
2316 void
2317 tdeftran(char ascii) {
2318 char c, (*bp)[2];
2319 static char tbl[][2] = {
2320 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2321 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2322 {'5', CS_FIN}, {'C', CS_FIN},
2323 {0, 0}
2324 };
2325
2326 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2327 /* nothing */;
2328
2329 if (c == 0)
2330 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2331 else
2332 term.trantbl[term.icharset] = (*bp)[1];
2333 }
2334
2335 void
2336 tselcs(void) {
2337 MODBIT(term.c.attr.mode,
2338 term.trantbl[term.charset] == CS_GRAPHIC0,
2339 ATTR_GFX);
2340 }
2341
2342 void
2343 tputc(char *c, int len) {
2344 uchar ascii = *c;
2345 bool control = ascii < '\x20' || ascii == 0177;
2346 long unicodep;
2347 int width;
2348
2349 if(len == 1) {
2350 width = 1;
2351 } else {
2352 utf8decode(c, &unicodep, UTF_SIZ);
2353 width = wcwidth(unicodep);
2354 }
2355
2356 if(IS_SET(MODE_PRINT))
2357 tprinter(c, len);
2358
2359 /*
2360 * STR sequences must be checked before anything else
2361 * because it can use some control codes as part of the sequence.
2362 */
2363 if(term.esc & ESC_STR) {
2364 switch(ascii) {
2365 case '\033':
2366 term.esc = ESC_START | ESC_STR_END;
2367 break;
2368 case '\a': /* backwards compatibility to xterm */
2369 term.esc = 0;
2370 strhandle();
2371 break;
2372 default:
2373 if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2374 memmove(&strescseq.buf[strescseq.len], c, len);
2375 strescseq.len += len;
2376 } else {
2377 /*
2378 * Here is a bug in terminals. If the user never sends
2379 * some code to stop the str or esc command, then st
2380 * will stop responding. But this is better than
2381 * silently failing with unknown characters. At least
2382 * then users will report back.
2383 *
2384 * In the case users ever get fixed, here is the code:
2385 */
2386 /*
2387 * term.esc = 0;
2388 * strhandle();
2389 */
2390 }
2391 }
2392 return;
2393 }
2394
2395 /*
2396 * Actions of control codes must be performed as soon they arrive
2397 * because they can be embedded inside a control sequence, and
2398 * they must not cause conflicts with sequences.
2399 */
2400 if(control) {
2401 switch(ascii) {
2402 case '\t': /* HT */
2403 tputtab(1);
2404 return;
2405 case '\b': /* BS */
2406 tmoveto(term.c.x-1, term.c.y);
2407 return;
2408 case '\r': /* CR */
2409 tmoveto(0, term.c.y);
2410 return;
2411 case '\f': /* LF */
2412 case '\v': /* VT */
2413 case '\n': /* LF */
2414 /* go to first col if the mode is set */
2415 tnewline(IS_SET(MODE_CRLF));
2416 return;
2417 case '\a': /* BEL */
2418 if(!(xw.state & WIN_FOCUSED))
2419 xseturgency(1);
2420 if (bellvolume)
2421 XBell(xw.dpy, bellvolume);
2422 return;
2423 case '\033': /* ESC */
2424 csireset();
2425 term.esc = ESC_START;
2426 return;
2427 case '\016': /* SO */
2428 term.charset = 0;
2429 tselcs();
2430 return;
2431 case '\017': /* SI */
2432 term.charset = 1;
2433 tselcs();
2434 return;
2435 case '\032': /* SUB */
2436 case '\030': /* CAN */
2437 csireset();
2438 return;
2439 case '\005': /* ENQ (IGNORED) */
2440 case '\000': /* NUL (IGNORED) */
2441 case '\021': /* XON (IGNORED) */
2442 case '\023': /* XOFF (IGNORED) */
2443 case 0177: /* DEL (IGNORED) */
2444 return;
2445 }
2446 } else if(term.esc & ESC_START) {
2447 if(term.esc & ESC_CSI) {
2448 csiescseq.buf[csiescseq.len++] = ascii;
2449 if(BETWEEN(ascii, 0x40, 0x7E)
2450 || csiescseq.len >= \
2451 sizeof(csiescseq.buf)-1) {
2452 term.esc = 0;
2453 csiparse();
2454 csihandle();
2455 }
2456 } else if(term.esc & ESC_STR_END) {
2457 term.esc = 0;
2458 if(ascii == '\\')
2459 strhandle();
2460 } else if(term.esc & ESC_ALTCHARSET) {
2461 tdeftran(ascii);
2462 tselcs();
2463 term.esc = 0;
2464 } else if(term.esc & ESC_TEST) {
2465 if(ascii == '8') { /* DEC screen alignment test. */
2466 char E[UTF_SIZ] = "E";
2467 int x, y;
2468
2469 for(x = 0; x < term.col; ++x) {
2470 for(y = 0; y < term.row; ++y)
2471 tsetchar(E, &term.c.attr, x, y);
2472 }
2473 }
2474 term.esc = 0;
2475 } else {
2476 switch(ascii) {
2477 case '[':
2478 term.esc |= ESC_CSI;
2479 break;
2480 case '#':
2481 term.esc |= ESC_TEST;
2482 break;
2483 case 'P': /* DCS -- Device Control String */
2484 case '_': /* APC -- Application Program Command */
2485 case '^': /* PM -- Privacy Message */
2486 case ']': /* OSC -- Operating System Command */
2487 case 'k': /* old title set compatibility */
2488 strreset();
2489 strescseq.type = ascii;
2490 term.esc |= ESC_STR;
2491 break;
2492 case '(': /* set primary charset G0 */
2493 case ')': /* set secondary charset G1 */
2494 case '*': /* set tertiary charset G2 */
2495 case '+': /* set quaternary charset G3 */
2496 term.icharset = ascii - '(';
2497 term.esc |= ESC_ALTCHARSET;
2498 break;
2499 case 'D': /* IND -- Linefeed */
2500 if(term.c.y == term.bot) {
2501 tscrollup(term.top, 1);
2502 } else {
2503 tmoveto(term.c.x, term.c.y+1);
2504 }
2505 term.esc = 0;
2506 break;
2507 case 'E': /* NEL -- Next line */
2508 tnewline(1); /* always go to first col */
2509 term.esc = 0;
2510 break;
2511 case 'H': /* HTS -- Horizontal tab stop */
2512 term.tabs[term.c.x] = 1;
2513 term.esc = 0;
2514 break;
2515 case 'M': /* RI -- Reverse index */
2516 if(term.c.y == term.top) {
2517 tscrolldown(term.top, 1);
2518 } else {
2519 tmoveto(term.c.x, term.c.y-1);
2520 }
2521 term.esc = 0;
2522 break;
2523 case 'Z': /* DECID -- Identify Terminal */
2524 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2525 term.esc = 0;
2526 break;
2527 case 'c': /* RIS -- Reset to inital state */
2528 treset();
2529 term.esc = 0;
2530 xresettitle();
2531 xloadcols();
2532 break;
2533 case '=': /* DECPAM -- Application keypad */
2534 term.mode |= MODE_APPKEYPAD;
2535 term.esc = 0;
2536 break;
2537 case '>': /* DECPNM -- Normal keypad */
2538 term.mode &= ~MODE_APPKEYPAD;
2539 term.esc = 0;
2540 break;
2541 case '7': /* DECSC -- Save Cursor */
2542 tcursor(CURSOR_SAVE);
2543 term.esc = 0;
2544 break;
2545 case '8': /* DECRC -- Restore Cursor */
2546 tcursor(CURSOR_LOAD);
2547 term.esc = 0;
2548 break;
2549 case '\\': /* ST -- Stop */
2550 term.esc = 0;
2551 break;
2552 default:
2553 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2554 (uchar) ascii, isprint(ascii)? ascii:'.');
2555 term.esc = 0;
2556 }
2557 }
2558 /*
2559 * All characters which form part of a sequence are not
2560 * printed
2561 */
2562 return;
2563 }
2564 /*
2565 * Display control codes only if we are in graphic mode
2566 */
2567 if(control && !(term.c.attr.mode & ATTR_GFX))
2568 return;
2569 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2570 selclear(NULL);
2571 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2572 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2573 tnewline(1);
2574 }
2575
2576 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2577 memmove(&term.line[term.c.y][term.c.x+1],
2578 &term.line[term.c.y][term.c.x],
2579 (term.col - term.c.x - 1) * sizeof(Glyph));
2580 }
2581
2582 if(term.c.x+width > term.col)
2583 tnewline(1);
2584
2585 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2586
2587 if(width == 2) {
2588 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2589 if(term.c.x+1 < term.col) {
2590 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2591 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2592 }
2593 }
2594 if(term.c.x+width < term.col) {
2595 tmoveto(term.c.x+width, term.c.y);
2596 } else {
2597 term.c.state |= CURSOR_WRAPNEXT;
2598 }
2599 }
2600
2601 int
2602 tresize(int col, int row) {
2603 int i;
2604 int minrow = MIN(row, term.row);
2605 int mincol = MIN(col, term.col);
2606 int slide = term.c.y - row + 1;
2607 bool *bp;
2608 Line *orig;
2609
2610 if(col < 1 || row < 1)
2611 return 0;
2612
2613 /* free unneeded rows */
2614 i = 0;
2615 if(slide > 0) {
2616 /*
2617 * slide screen to keep cursor where we expect it -
2618 * tscrollup would work here, but we can optimize to
2619 * memmove because we're freeing the earlier lines
2620 */
2621 for(/* i = 0 */; i < slide; i++) {
2622 free(term.line[i]);
2623 free(term.alt[i]);
2624 }
2625 memmove(term.line, term.line + slide, row * sizeof(Line));
2626 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2627 }
2628 for(i += row; i < term.row; i++) {
2629 free(term.line[i]);
2630 free(term.alt[i]);
2631 }
2632
2633 /* resize to new height */
2634 term.line = xrealloc(term.line, row * sizeof(Line));
2635 term.alt = xrealloc(term.alt, row * sizeof(Line));
2636 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2637 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2638
2639 /* resize each row to new width, zero-pad if needed */
2640 for(i = 0; i < minrow; i++) {
2641 term.dirty[i] = 1;
2642 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2643 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2644 }
2645
2646 /* allocate any new rows */
2647 for(/* i == minrow */; i < row; i++) {
2648 term.dirty[i] = 1;
2649 term.line[i] = xmalloc(col * sizeof(Glyph));
2650 term.alt[i] = xmalloc(col * sizeof(Glyph));
2651 }
2652 if(col > term.col) {
2653 bp = term.tabs + term.col;
2654
2655 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2656 while(--bp > term.tabs && !*bp)
2657 /* nothing */ ;
2658 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2659 *bp = 1;
2660 }
2661 /* update terminal size */
2662 term.col = col;
2663 term.row = row;
2664 /* reset scrolling region */
2665 tsetscroll(0, row-1);
2666 /* make use of the LIMIT in tmoveto */
2667 tmoveto(term.c.x, term.c.y);
2668 /* Clearing both screens */
2669 orig = term.line;
2670 do {
2671 if(mincol < col && 0 < minrow) {
2672 tclearregion(mincol, 0, col - 1, minrow - 1);
2673 }
2674 if(0 < col && minrow < row) {
2675 tclearregion(0, minrow, col - 1, row - 1);
2676 }
2677 tcursor(CURSOR_SAVE);
2678 tswapscreen();
2679 tcursor(CURSOR_LOAD);
2680 } while(orig != term.line);
2681
2682 return (slide > 0);
2683 }
2684
2685 void
2686 xresize(int col, int row) {
2687 xw.tw = MAX(1, col * xw.cw);
2688 xw.th = MAX(1, row * xw.ch);
2689
2690 XFreePixmap(xw.dpy, xw.buf);
2691 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2692 DefaultDepth(xw.dpy, xw.scr));
2693 XftDrawChange(xw.draw, xw.buf);
2694 xclear(0, 0, xw.w, xw.h);
2695 }
2696
2697 static inline ushort
2698 sixd_to_16bit(int x) {
2699 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2700 }
2701
2702 void
2703 xloadcols(void) {
2704 int i, r, g, b;
2705 XRenderColor color = { .alpha = 0xffff };
2706 static bool loaded;
2707 Colour *cp;
2708
2709 if(loaded) {
2710 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2711 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2712 }
2713
2714 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2715 for(i = 0; i < LEN(colorname); i++) {
2716 if(!colorname[i])
2717 continue;
2718 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2719 die("Could not allocate color '%s'\n", colorname[i]);
2720 }
2721 }
2722
2723 /* load colors [16-255] ; same colors as xterm */
2724 for(i = 16, r = 0; r < 6; r++) {
2725 for(g = 0; g < 6; g++) {
2726 for(b = 0; b < 6; b++) {
2727 color.red = sixd_to_16bit(r);
2728 color.green = sixd_to_16bit(g);
2729 color.blue = sixd_to_16bit(b);
2730 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2731 die("Could not allocate color %d\n", i);
2732 }
2733 i++;
2734 }
2735 }
2736 }
2737
2738 for(r = 0; r < 24; r++, i++) {
2739 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2740 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2741 &dc.col[i])) {
2742 die("Could not allocate color %d\n", i);
2743 }
2744 }
2745 loaded = true;
2746 }
2747
2748 int
2749 xsetcolorname(int x, const char *name) {
2750 XRenderColor color = { .alpha = 0xffff };
2751 Colour colour;
2752 if(!BETWEEN(x, 0, LEN(colorname)))
2753 return -1;
2754 if(!name) {
2755 if(BETWEEN(x, 16, 16 + 215)) {
2756 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2757 color.red = sixd_to_16bit(r);
2758 color.green = sixd_to_16bit(g);
2759 color.blue = sixd_to_16bit(b);
2760 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2761 return 0; /* something went wrong */
2762 dc.col[x] = colour;
2763 return 1;
2764 } else if(BETWEEN(x, 16 + 216, 255)) {
2765 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2766 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2767 return 0; /* something went wrong */
2768 dc.col[x] = colour;
2769 return 1;
2770 } else {
2771 name = colorname[x];
2772 }
2773 }
2774 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2775 return 0;
2776 dc.col[x] = colour;
2777 return 1;
2778 }
2779
2780 void
2781 xtermclear(int col1, int row1, int col2, int row2) {
2782 XftDrawRect(xw.draw,
2783 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2784 borderpx + col1 * xw.cw,
2785 borderpx + row1 * xw.ch,
2786 (col2-col1+1) * xw.cw,
2787 (row2-row1+1) * xw.ch);
2788 }
2789
2790 /*
2791 * Absolute coordinates.
2792 */
2793 void
2794 xclear(int x1, int y1, int x2, int y2) {
2795 XftDrawRect(xw.draw,
2796 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2797 x1, y1, x2-x1, y2-y1);
2798 }
2799
2800 void
2801 xhints(void) {
2802 XClassHint class = {opt_class ? opt_class : termname, termname};
2803 XWMHints wm = {.flags = InputHint, .input = 1};
2804 XSizeHints *sizeh = NULL;
2805
2806 sizeh = XAllocSizeHints();
2807
2808 sizeh->flags = PSize | PResizeInc | PBaseSize;
2809 sizeh->height = xw.h;
2810 sizeh->width = xw.w;
2811 sizeh->height_inc = xw.ch;
2812 sizeh->width_inc = xw.cw;
2813 sizeh->base_height = 2 * borderpx;
2814 sizeh->base_width = 2 * borderpx;
2815 if(xw.isfixed == True) {
2816 sizeh->flags |= PMaxSize | PMinSize;
2817 sizeh->min_width = sizeh->max_width = xw.w;
2818 sizeh->min_height = sizeh->max_height = xw.h;
2819 }
2820 if(xw.gm & (XValue|YValue)) {
2821 sizeh->flags |= USPosition | PWinGravity;
2822 sizeh->x = xw.l;
2823 sizeh->y = xw.t;
2824 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2825 }
2826
2827 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2828 &class);
2829 XFree(sizeh);
2830 }
2831
2832 int
2833 xgeommasktogravity(int mask) {
2834 switch(mask & (XNegative|YNegative)) {
2835 case 0:
2836 return NorthWestGravity;
2837 case XNegative:
2838 return NorthEastGravity;
2839 case YNegative:
2840 return SouthWestGravity;
2841 }
2842 return SouthEastGravity;
2843 }
2844
2845 int
2846 xloadfont(Font *f, FcPattern *pattern) {
2847 FcPattern *match;
2848 FcResult result;
2849
2850 match = FcFontMatch(NULL, pattern, &result);
2851 if(!match)
2852 return 1;
2853
2854 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2855 FcPatternDestroy(match);
2856 return 1;
2857 }
2858
2859 f->set = NULL;
2860 f->pattern = FcPatternDuplicate(pattern);
2861
2862 f->ascent = f->match->ascent;
2863 f->descent = f->match->descent;
2864 f->lbearing = 0;
2865 f->rbearing = f->match->max_advance_width;
2866
2867 f->height = f->ascent + f->descent;
2868 f->width = f->lbearing + f->rbearing;
2869
2870 return 0;
2871 }
2872
2873 void
2874 xloadfonts(char *fontstr, double fontsize) {
2875 FcPattern *pattern;
2876 FcResult r_sz, r_psz;
2877 double fontval;
2878
2879 if(fontstr[0] == '-') {
2880 pattern = XftXlfdParse(fontstr, False, False);
2881 } else {
2882 pattern = FcNameParse((FcChar8 *)fontstr);
2883 }
2884
2885 if(!pattern)
2886 die("st: can't open font %s\n", fontstr);
2887
2888 if(fontsize > 0) {
2889 FcPatternDel(pattern, FC_PIXEL_SIZE);
2890 FcPatternDel(pattern, FC_SIZE);
2891 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2892 usedfontsize = fontsize;
2893 } else {
2894 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2895 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2896 if(r_psz == FcResultMatch) {
2897 usedfontsize = fontval;
2898 } else if(r_sz == FcResultMatch) {
2899 usedfontsize = -1;
2900 } else {
2901 /*
2902 * Default font size is 12, if none given. This is to
2903 * have a known usedfontsize value.
2904 */
2905 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2906 usedfontsize = 12;
2907 }
2908 }
2909
2910 FcConfigSubstitute(0, pattern, FcMatchPattern);
2911 FcDefaultSubstitute(pattern);
2912
2913 if(xloadfont(&dc.font, pattern))
2914 die("st: can't open font %s\n", fontstr);
2915
2916 if(usedfontsize < 0) {
2917 FcPatternGetDouble(dc.font.match->pattern,
2918 FC_PIXEL_SIZE, 0, &fontval);
2919 usedfontsize = fontval;
2920 }
2921
2922 /* Setting character width and height. */
2923 xw.cw = CEIL(dc.font.width * cwscale);
2924 xw.ch = CEIL(dc.font.height * chscale);
2925
2926 FcPatternDel(pattern, FC_SLANT);
2927 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2928 if(xloadfont(&dc.ifont, pattern))
2929 die("st: can't open font %s\n", fontstr);
2930
2931 FcPatternDel(pattern, FC_WEIGHT);
2932 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2933 if(xloadfont(&dc.ibfont, pattern))
2934 die("st: can't open font %s\n", fontstr);
2935
2936 FcPatternDel(pattern, FC_SLANT);
2937 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2938 if(xloadfont(&dc.bfont, pattern))
2939 die("st: can't open font %s\n", fontstr);
2940
2941 FcPatternDestroy(pattern);
2942 }
2943
2944 int
2945 xloadfontset(Font *f) {
2946 FcResult result;
2947
2948 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2949 return 1;
2950 return 0;
2951 }
2952
2953 void
2954 xunloadfont(Font *f) {
2955 XftFontClose(xw.dpy, f->match);
2956 FcPatternDestroy(f->pattern);
2957 if(f->set)
2958 FcFontSetDestroy(f->set);
2959 }
2960
2961 void
2962 xunloadfonts(void) {
2963 int i;
2964
2965 /* Free the loaded fonts in the font cache. */
2966 for(i = 0; i < frclen; i++) {
2967 XftFontClose(xw.dpy, frc[i].font);
2968 }
2969 frclen = 0;
2970
2971 xunloadfont(&dc.font);
2972 xunloadfont(&dc.bfont);
2973 xunloadfont(&dc.ifont);
2974 xunloadfont(&dc.ibfont);
2975 }
2976
2977 void
2978 xzoom(const Arg *arg) {
2979 xunloadfonts();
2980 xloadfonts(usedfont, usedfontsize + arg->i);
2981 cresize(0, 0);
2982 redraw(0);
2983 }
2984
2985 void
2986 xinit(void) {
2987 XGCValues gcvalues;
2988 Cursor cursor;
2989 Window parent;
2990 pid_t thispid = getpid();
2991
2992 if(!(xw.dpy = XOpenDisplay(NULL)))
2993 die("Can't open display\n");
2994 xw.scr = XDefaultScreen(xw.dpy);
2995 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
2996
2997 /* font */
2998 if(!FcInit())
2999 die("Could not init fontconfig.\n");
3000
3001 usedfont = (opt_font == NULL)? font : opt_font;
3002 xloadfonts(usedfont, 0);
3003
3004 /* colors */
3005 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3006 xloadcols();
3007
3008 /* adjust fixed window geometry */
3009 xw.w = 2 * borderpx + term.col * xw.cw;
3010 xw.h = 2 * borderpx + term.row * xw.ch;
3011 if(xw.gm & XNegative)
3012 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3013 if(xw.gm & YNegative)
3014 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3015
3016 /* Events */
3017 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3018 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3019 xw.attrs.bit_gravity = NorthWestGravity;
3020 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3021 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3022 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3023 xw.attrs.colormap = xw.cmap;
3024
3025 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3026 XRootWindow(xw.dpy, xw.scr);
3027 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3028 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3029 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3030 | CWEventMask | CWColormap, &xw.attrs);
3031
3032 memset(&gcvalues, 0, sizeof(gcvalues));
3033 gcvalues.graphics_exposures = False;
3034 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3035 &gcvalues);
3036 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3037 DefaultDepth(xw.dpy, xw.scr));
3038 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3039 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3040
3041 /* Xft rendering context */
3042 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3043
3044 /* input methods */
3045 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3046 XSetLocaleModifiers("@im=local");
3047 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3048 XSetLocaleModifiers("@im=");
3049 if((xw.xim = XOpenIM(xw.dpy,
3050 NULL, NULL, NULL)) == NULL) {
3051 die("XOpenIM failed. Could not open input"
3052 " device.\n");
3053 }
3054 }
3055 }
3056 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3057 | XIMStatusNothing, XNClientWindow, xw.win,
3058 XNFocusWindow, xw.win, NULL);
3059 if(xw.xic == NULL)
3060 die("XCreateIC failed. Could not obtain input method.\n");
3061
3062 /* white cursor, black outline */
3063 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3064 XDefineCursor(xw.dpy, xw.win, cursor);
3065 XRecolorCursor(xw.dpy, cursor,
3066 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3067 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3068
3069 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3070 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3071 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3072 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3073
3074 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3075 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3076 PropModeReplace, (uchar *)&thispid, 1);
3077
3078 xresettitle();
3079 XMapWindow(xw.dpy, xw.win);
3080 xhints();
3081 XSync(xw.dpy, False);
3082 }
3083
3084 void
3085 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3086 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3087 width = charlen * xw.cw, xp, i;
3088 int frcflags;
3089 int u8fl, u8fblen, u8cblen, doesexist;
3090 char *u8c, *u8fs;
3091 long unicodep;
3092 Font *font = &dc.font;
3093 FcResult fcres;
3094 FcPattern *fcpattern, *fontpattern;
3095 FcFontSet *fcsets[] = { NULL };
3096 FcCharSet *fccharset;
3097 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3098 XRenderColor colfg, colbg;
3099 XRectangle r;
3100 int oneatatime;
3101
3102 frcflags = FRC_NORMAL;
3103
3104 if(base.mode & ATTR_ITALIC) {
3105 if(base.fg == defaultfg)
3106 base.fg = defaultitalic;
3107 font = &dc.ifont;
3108 frcflags = FRC_ITALIC;
3109 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3110 if(base.fg == defaultfg)
3111 base.fg = defaultitalic;
3112 font = &dc.ibfont;
3113 frcflags = FRC_ITALICBOLD;
3114 } else if(base.mode & ATTR_UNDERLINE) {
3115 if(base.fg == defaultfg)
3116 base.fg = defaultunderline;
3117 }
3118
3119 if(IS_TRUECOL(base.fg)) {
3120 colfg.alpha = 0xffff;
3121 colfg.red = TRUERED(base.fg);
3122 colfg.green = TRUEGREEN(base.fg);
3123 colfg.blue = TRUEBLUE(base.fg);
3124 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3125 fg = &truefg;
3126 } else {
3127 fg = &dc.col[base.fg];
3128 }
3129
3130 if(IS_TRUECOL(base.bg)) {
3131 colbg.alpha = 0xffff;
3132 colbg.green = TRUEGREEN(base.bg);
3133 colbg.red = TRUERED(base.bg);
3134 colbg.blue = TRUEBLUE(base.bg);
3135 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3136 bg = &truebg;
3137 } else {
3138 bg = &dc.col[base.bg];
3139 }
3140
3141 if(base.mode & ATTR_BOLD) {
3142 if(BETWEEN(base.fg, 0, 7)) {
3143 /* basic system colors */
3144 fg = &dc.col[base.fg + 8];
3145 } else if(BETWEEN(base.fg, 16, 195)) {
3146 /* 256 colors */
3147 fg = &dc.col[base.fg + 36];
3148 } else if(BETWEEN(base.fg, 232, 251)) {
3149 /* greyscale */
3150 fg = &dc.col[base.fg + 4];
3151 }
3152 /*
3153 * Those ranges will not be brightened:
3154 * 8 - 15 – bright system colors
3155 * 196 - 231 – highest 256 color cube
3156 * 252 - 255 – brightest colors in greyscale
3157 */
3158 font = &dc.bfont;
3159 frcflags = FRC_BOLD;
3160 }
3161
3162 if(IS_SET(MODE_REVERSE)) {
3163 if(fg == &dc.col[defaultfg]) {
3164 fg = &dc.col[defaultbg];
3165 } else {
3166 colfg.red = ~fg->color.red;
3167 colfg.green = ~fg->color.green;
3168 colfg.blue = ~fg->color.blue;
3169 colfg.alpha = fg->color.alpha;
3170 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3171 &revfg);
3172 fg = &revfg;
3173 }
3174
3175 if(bg == &dc.col[defaultbg]) {
3176 bg = &dc.col[defaultfg];
3177 } else {
3178 colbg.red = ~bg->color.red;
3179 colbg.green = ~bg->color.green;
3180 colbg.blue = ~bg->color.blue;
3181 colbg.alpha = bg->color.alpha;
3182 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3183 &revbg);
3184 bg = &revbg;
3185 }
3186 }
3187
3188 if(base.mode & ATTR_REVERSE) {
3189 temp = fg;
3190 fg = bg;
3191 bg = temp;
3192 }
3193
3194 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3195 fg = bg;
3196
3197 /* Intelligent cleaning up of the borders. */
3198 if(x == 0) {
3199 xclear(0, (y == 0)? 0 : winy, borderpx,
3200 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3201 }
3202 if(x + charlen >= term.col) {
3203 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3204 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3205 }
3206 if(y == 0)
3207 xclear(winx, 0, winx + width, borderpx);
3208 if(y == term.row-1)
3209 xclear(winx, winy + xw.ch, winx + width, xw.h);
3210
3211 /* Clean up the region we want to draw to. */
3212 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3213
3214 /* Set the clip region because Xft is sometimes dirty. */
3215 r.x = 0;
3216 r.y = 0;
3217 r.height = xw.ch;
3218 r.width = width;
3219 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3220
3221 for(xp = winx; bytelen > 0;) {
3222 /*
3223 * Search for the range in the to be printed string of glyphs
3224 * that are in the main font. Then print that range. If
3225 * some glyph is found that is not in the font, do the
3226 * fallback dance.
3227 */
3228 u8fs = s;
3229 u8fblen = 0;
3230 u8fl = 0;
3231 oneatatime = font->width != xw.cw;
3232 for(;;) {
3233 u8c = s;
3234 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3235 s += u8cblen;
3236 bytelen -= u8cblen;
3237
3238 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3239 if(oneatatime || !doesexist || bytelen <= 0) {
3240 if(oneatatime || bytelen <= 0) {
3241 if(doesexist) {
3242 u8fl++;
3243 u8fblen += u8cblen;
3244 }
3245 }
3246
3247 if(u8fl > 0) {
3248 XftDrawStringUtf8(xw.draw, fg,
3249 font->match, xp,
3250 winy + font->ascent,
3251 (FcChar8 *)u8fs,
3252 u8fblen);
3253 xp += xw.cw * u8fl;
3254
3255 }
3256 break;
3257 }
3258
3259 u8fl++;
3260 u8fblen += u8cblen;
3261 }
3262 if(doesexist) {
3263 if(oneatatime)
3264 continue;
3265 break;
3266 }
3267
3268 /* Search the font cache. */
3269 for(i = 0; i < frclen; i++) {
3270 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3271 && frc[i].flags == frcflags) {
3272 break;
3273 }
3274 }
3275
3276 /* Nothing was found. */
3277 if(i >= frclen) {
3278 if(!font->set)
3279 xloadfontset(font);
3280 fcsets[0] = font->set;
3281
3282 /*
3283 * Nothing was found in the cache. Now use
3284 * some dozen of Fontconfig calls to get the
3285 * font for one single character.
3286 *
3287 * Xft and fontconfig are design failures.
3288 */
3289 fcpattern = FcPatternDuplicate(font->pattern);
3290 fccharset = FcCharSetCreate();
3291
3292 FcCharSetAddChar(fccharset, unicodep);
3293 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3294 fccharset);
3295 FcPatternAddBool(fcpattern, FC_SCALABLE,
3296 FcTrue);
3297
3298 FcConfigSubstitute(0, fcpattern,
3299 FcMatchPattern);
3300 FcDefaultSubstitute(fcpattern);
3301
3302 fontpattern = FcFontSetMatch(0, fcsets,
3303 FcTrue, fcpattern, &fcres);
3304
3305 /*
3306 * Overwrite or create the new cache entry.
3307 */
3308 if(frclen >= LEN(frc)) {
3309 frclen = LEN(frc) - 1;
3310 XftFontClose(xw.dpy, frc[frclen].font);
3311 }
3312
3313 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3314 fontpattern);
3315 frc[frclen].flags = frcflags;
3316
3317 i = frclen;
3318 frclen++;
3319
3320 FcPatternDestroy(fcpattern);
3321 FcCharSetDestroy(fccharset);
3322 }
3323
3324 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3325 xp, winy + frc[i].font->ascent,
3326 (FcChar8 *)u8c, u8cblen);
3327
3328 xp += xw.cw * wcwidth(unicodep);
3329 }
3330
3331 /*
3332 * This is how the loop above actually should be. Why does the
3333 * application have to care about font details?
3334 *
3335 * I have to repeat: Xft and Fontconfig are design failures.
3336 */
3337 /*
3338 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3339 winy + font->ascent, (FcChar8 *)s, bytelen);
3340 */
3341
3342 if(base.mode & ATTR_UNDERLINE) {
3343 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3344 width, 1);
3345 }
3346
3347 /* Reset clip to none. */
3348 XftDrawSetClip(xw.draw, 0);
3349 }
3350
3351 void
3352 xdrawcursor(void) {
3353 static int oldx = 0, oldy = 0;
3354 int sl, width, curx;
3355 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3356
3357 LIMIT(oldx, 0, term.col-1);
3358 LIMIT(oldy, 0, term.row-1);
3359
3360 curx = term.c.x;
3361
3362 /* adjust position if in dummy */
3363 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3364 oldx--;
3365 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3366 curx--;
3367
3368 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3369
3370 /* remove the old cursor */
3371 sl = utf8len(term.line[oldy][oldx].c);
3372 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3373 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3374 oldy, width, sl);
3375
3376 /* draw the new one */
3377 if(!(IS_SET(MODE_HIDE))) {
3378 if(xw.state & WIN_FOCUSED) {
3379 if(IS_SET(MODE_REVERSE)) {
3380 g.mode |= ATTR_REVERSE;
3381 g.fg = defaultcs;
3382 g.bg = defaultfg;
3383 }
3384
3385 sl = utf8len(g.c);
3386 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3387 ? 2 : 1;
3388 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3389 } else {
3390 XftDrawRect(xw.draw, &dc.col[defaultcs],
3391 borderpx + curx * xw.cw,
3392 borderpx + term.c.y * xw.ch,
3393 xw.cw - 1, 1);
3394 XftDrawRect(xw.draw, &dc.col[defaultcs],
3395 borderpx + curx * xw.cw,
3396 borderpx + term.c.y * xw.ch,
3397 1, xw.ch - 1);
3398 XftDrawRect(xw.draw, &dc.col[defaultcs],
3399 borderpx + (curx + 1) * xw.cw - 1,
3400 borderpx + term.c.y * xw.ch,
3401 1, xw.ch - 1);
3402 XftDrawRect(xw.draw, &dc.col[defaultcs],
3403 borderpx + curx * xw.cw,
3404 borderpx + (term.c.y + 1) * xw.ch - 1,
3405 xw.cw, 1);
3406 }
3407 oldx = curx, oldy = term.c.y;
3408 }
3409 }
3410
3411
3412 void
3413 xsettitle(char *p) {
3414 XTextProperty prop;
3415
3416 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3417 &prop);
3418 XSetWMName(xw.dpy, xw.win, &prop);
3419 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3420 XFree(prop.value);
3421 }
3422
3423 void
3424 xresettitle(void) {
3425 xsettitle(opt_title ? opt_title : "st");
3426 }
3427
3428 void
3429 redraw(int timeout) {
3430 struct timespec tv = {0, timeout * 1000};
3431
3432 draw();
3433
3434 if(timeout > 0) {
3435 nanosleep(&tv, NULL);
3436 XSync(xw.dpy, False); /* necessary for a good tput flash */
3437 }
3438 }
3439
3440 void
3441 draw(void) {
3442 drawregion(0, 0, term.col, term.row);
3443 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3444 xw.h, 0, 0);
3445 XSetForeground(xw.dpy, dc.gc,
3446 dc.col[IS_SET(MODE_REVERSE)?
3447 defaultfg : defaultbg].pixel);
3448 }
3449
3450 void
3451 drawregion(int x1, int y1, int x2, int y2) {
3452 int ic, ib, x, y, ox, sl;
3453 Glyph base, new;
3454 char buf[DRAW_BUF_SIZ];
3455 bool ena_sel = sel.ob.x != -1;
3456 long unicodep;
3457
3458 if(sel.alt != IS_SET(MODE_ALTSCREEN))
3459 ena_sel = 0;
3460
3461 if(!(xw.state & WIN_VISIBLE))
3462 return;
3463
3464 for(y = y1; y < y2; y++) {
3465 if(!term.dirty[y])
3466 continue;
3467
3468 xtermclear(0, y, term.col, y);
3469 term.dirty[y] = 0;
3470 base = term.line[y][0];
3471 ic = ib = ox = 0;
3472 for(x = x1; x < x2; x++) {
3473 new = term.line[y][x];
3474 if(new.mode == ATTR_WDUMMY)
3475 continue;
3476 if(ena_sel && selected(x, y))
3477 new.mode ^= ATTR_REVERSE;
3478 if(ib > 0 && (ATTRCMP(base, new)
3479 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3480 xdraws(buf, base, ox, y, ic, ib);
3481 ic = ib = 0;
3482 }
3483 if(ib == 0) {
3484 ox = x;
3485 base = new;
3486 }
3487
3488 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3489 memcpy(buf+ib, new.c, sl);
3490 ib += sl;
3491 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3492 }
3493 if(ib > 0)
3494 xdraws(buf, base, ox, y, ic, ib);
3495 }
3496 xdrawcursor();
3497 }
3498
3499 void
3500 expose(XEvent *ev) {
3501 XExposeEvent *e = &ev->xexpose;
3502
3503 if(xw.state & WIN_REDRAW) {
3504 if(!e->count)
3505 xw.state &= ~WIN_REDRAW;
3506 }
3507 redraw(0);
3508 }
3509
3510 void
3511 visibility(XEvent *ev) {
3512 XVisibilityEvent *e = &ev->xvisibility;
3513
3514 if(e->state == VisibilityFullyObscured) {
3515 xw.state &= ~WIN_VISIBLE;
3516 } else if(!(xw.state & WIN_VISIBLE)) {
3517 /* need a full redraw for next Expose, not just a buf copy */
3518 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3519 }
3520 }
3521
3522 void
3523 unmap(XEvent *ev) {
3524 xw.state &= ~WIN_VISIBLE;
3525 }
3526
3527 void
3528 xsetpointermotion(int set) {
3529 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3530 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3531 }
3532
3533 void
3534 xseturgency(int add) {
3535 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3536
3537 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3538 XSetWMHints(xw.dpy, xw.win, h);
3539 XFree(h);
3540 }
3541
3542 void
3543 focus(XEvent *ev) {
3544 XFocusChangeEvent *e = &ev->xfocus;
3545
3546 if(e->mode == NotifyGrab)
3547 return;
3548
3549 if(ev->type == FocusIn) {
3550 XSetICFocus(xw.xic);
3551 xw.state |= WIN_FOCUSED;
3552 xseturgency(0);
3553 if(IS_SET(MODE_FOCUS))
3554 ttywrite("\033[I", 3);
3555 } else {
3556 XUnsetICFocus(xw.xic);
3557 xw.state &= ~WIN_FOCUSED;
3558 if(IS_SET(MODE_FOCUS))
3559 ttywrite("\033[O", 3);
3560 }
3561 }
3562
3563 static inline bool
3564 match(uint mask, uint state) {
3565 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3566 }
3567
3568 void
3569 numlock(const Arg *dummy) {
3570 term.numlock ^= 1;
3571 }
3572
3573 char*
3574 kmap(KeySym k, uint state) {
3575 Key *kp;
3576 int i;
3577
3578 /* Check for mapped keys out of X11 function keys. */
3579 for(i = 0; i < LEN(mappedkeys); i++) {
3580 if(mappedkeys[i] == k)
3581 break;
3582 }
3583 if(i == LEN(mappedkeys)) {
3584 if((k & 0xFFFF) < 0xFD00)
3585 return NULL;
3586 }
3587
3588 for(kp = key; kp < key + LEN(key); kp++) {
3589 if(kp->k != k)
3590 continue;
3591
3592 if(!match(kp->mask, state))
3593 continue;
3594
3595 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3596 continue;
3597 if(term.numlock && kp->appkey == 2)
3598 continue;
3599
3600 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3601 continue;
3602
3603 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3604 continue;
3605
3606 return kp->s;
3607 }
3608
3609 return NULL;
3610 }
3611
3612 void
3613 kpress(XEvent *ev) {
3614 XKeyEvent *e = &ev->xkey;
3615 KeySym ksym;
3616 char buf[32], *customkey;
3617 int len;
3618 long c;
3619 Status status;
3620 Shortcut *bp;
3621
3622 if(IS_SET(MODE_KBDLOCK))
3623 return;
3624
3625 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3626 /* 1. shortcuts */
3627 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3628 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3629 bp->func(&(bp->arg));
3630 return;
3631 }
3632 }
3633
3634 /* 2. custom keys from config.h */
3635 if((customkey = kmap(ksym, e->state))) {
3636 ttysend(customkey, strlen(customkey));
3637 return;
3638 }
3639
3640 /* 3. composed string from input method */
3641 if(len == 0)
3642 return;
3643 if(len == 1 && e->state & Mod1Mask) {
3644 if(IS_SET(MODE_8BIT)) {
3645 if(*buf < 0177) {
3646 c = *buf | 0x80;
3647 len = utf8encode(c, buf, UTF_SIZ);
3648 }
3649 } else {
3650 buf[1] = buf[0];
3651 buf[0] = '\033';
3652 len = 2;
3653 }
3654 }
3655 ttysend(buf, len);
3656 }
3657
3658
3659 void
3660 cmessage(XEvent *e) {
3661 /*
3662 * See xembed specs
3663 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3664 */
3665 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3666 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3667 xw.state |= WIN_FOCUSED;
3668 xseturgency(0);
3669 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3670 xw.state &= ~WIN_FOCUSED;
3671 }
3672 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3673 /* Send SIGHUP to shell */
3674 kill(pid, SIGHUP);
3675 exit(EXIT_SUCCESS);
3676 }
3677 }
3678
3679 void
3680 cresize(int width, int height) {
3681 int col, row;
3682
3683 if(width != 0)
3684 xw.w = width;
3685 if(height != 0)
3686 xw.h = height;
3687
3688 col = (xw.w - 2 * borderpx) / xw.cw;
3689 row = (xw.h - 2 * borderpx) / xw.ch;
3690
3691 tresize(col, row);
3692 xresize(col, row);
3693 ttyresize();
3694 }
3695
3696 void
3697 resize(XEvent *e) {
3698 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3699 return;
3700
3701 cresize(e->xconfigure.width, e->xconfigure.height);
3702 }
3703
3704 void
3705 run(void) {
3706 XEvent ev;
3707 int w = xw.w, h = xw.h;
3708 fd_set rfd;
3709 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3710 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3711
3712 /* Waiting for window mapping */
3713 while(1) {
3714 XNextEvent(xw.dpy, &ev);
3715 if(ev.type == ConfigureNotify) {
3716 w = ev.xconfigure.width;
3717 h = ev.xconfigure.height;
3718 } else if(ev.type == MapNotify) {
3719 break;
3720 }
3721 }
3722
3723 ttynew();
3724 cresize(w, h);
3725
3726 gettimeofday(&last, NULL);
3727 lastblink = last;
3728
3729 for(xev = actionfps;;) {
3730 long deltatime;
3731
3732 FD_ZERO(&rfd);
3733 FD_SET(cmdfd, &rfd);
3734 FD_SET(xfd, &rfd);
3735
3736 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3737 if(errno == EINTR)
3738 continue;
3739 die("select failed: %s\n", strerror(errno));
3740 }
3741 if(FD_ISSET(cmdfd, &rfd)) {
3742 ttyread();
3743 if(blinktimeout) {
3744 blinkset = tattrset(ATTR_BLINK);
3745 if(!blinkset)
3746 MODBIT(term.mode, 0, MODE_BLINK);
3747 }
3748 }
3749
3750 if(FD_ISSET(xfd, &rfd))
3751 xev = actionfps;
3752
3753 gettimeofday(&now, NULL);
3754 drawtimeout.tv_sec = 0;
3755 drawtimeout.tv_usec = (1000/xfps) * 1000;
3756 tv = &drawtimeout;
3757
3758 dodraw = 0;
3759 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3760 tsetdirtattr(ATTR_BLINK);
3761 term.mode ^= MODE_BLINK;
3762 lastblink = now;
3763 dodraw = 1;
3764 }
3765 deltatime = TIMEDIFF(now, last);
3766 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3767 || deltatime < 0) {
3768 dodraw = 1;
3769 last = now;
3770 }
3771
3772 if(dodraw) {
3773 while(XPending(xw.dpy)) {
3774 XNextEvent(xw.dpy, &ev);
3775 if(XFilterEvent(&ev, None))
3776 continue;
3777 if(handler[ev.type])
3778 (handler[ev.type])(&ev);
3779 }
3780
3781 draw();
3782 XFlush(xw.dpy);
3783
3784 if(xev && !FD_ISSET(xfd, &rfd))
3785 xev--;
3786 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3787 if(blinkset) {
3788 if(TIMEDIFF(now, lastblink) \
3789 > blinktimeout) {
3790 drawtimeout.tv_usec = 1;
3791 } else {
3792 drawtimeout.tv_usec = (1000 * \
3793 (blinktimeout - \
3794 TIMEDIFF(now,
3795 lastblink)));
3796 }
3797 } else {
3798 tv = NULL;
3799 }
3800 }
3801 }
3802 }
3803 }
3804
3805 void
3806 usage(void) {
3807 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3808 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3809 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3810 }
3811
3812 int
3813 main(int argc, char *argv[]) {
3814 char *titles;
3815 uint cols = 80, rows = 24;
3816
3817 xw.l = xw.t = 0;
3818 xw.isfixed = False;
3819
3820 ARGBEGIN {
3821 case 'a':
3822 allowaltscreen = false;
3823 break;
3824 case 'c':
3825 opt_class = EARGF(usage());
3826 break;
3827 case 'e':
3828 /* eat all remaining arguments */
3829 if(argc > 1) {
3830 opt_cmd = &argv[1];
3831 if(argv[1] != NULL && opt_title == NULL) {
3832 titles = xstrdup(argv[1]);
3833 opt_title = basename(titles);
3834 }
3835 }
3836 goto run;
3837 case 'f':
3838 opt_font = EARGF(usage());
3839 break;
3840 case 'g':
3841 xw.gm = XParseGeometry(EARGF(usage()),
3842 &xw.l, &xw.t, &cols, &rows);
3843 break;
3844 case 'i':
3845 xw.isfixed = True;
3846 break;
3847 case 'o':
3848 opt_io = EARGF(usage());
3849 break;
3850 case 't':
3851 opt_title = EARGF(usage());
3852 break;
3853 case 'w':
3854 opt_embed = EARGF(usage());
3855 break;
3856 case 'v':
3857 default:
3858 usage();
3859 } ARGEND;
3860
3861 run:
3862 setlocale(LC_CTYPE, "");
3863 XSetLocaleModifiers("");
3864 tnew(cols? cols : 1, rows? rows : 1);
3865 xinit();
3866 selinit();
3867 run();
3868
3869 return 0;
3870 }
3871