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[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a)[0])
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f))
74 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
75 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
80 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
81 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
82
83 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
84 #define IS_TRUECOL(x) (1 << 24 & (x))
85 #define TRUERED(x) (((x) & 0xff0000) >> 8)
86 #define TRUEGREEN(x) (((x) & 0xff00))
87 #define TRUEBLUE(x) (((x) & 0xff) << 8)
88
89
90 #define VT102ID "\033[?6c"
91
92 enum glyph_attribute {
93 ATTR_NULL = 0,
94 ATTR_REVERSE = 1,
95 ATTR_UNDERLINE = 2,
96 ATTR_BOLD = 4,
97 ATTR_GFX = 8,
98 ATTR_ITALIC = 16,
99 ATTR_BLINK = 32,
100 ATTR_WRAP = 64,
101 ATTR_WIDE = 128,
102 ATTR_WDUMMY = 256,
103 };
104
105 enum cursor_movement {
106 CURSOR_SAVE,
107 CURSOR_LOAD
108 };
109
110 enum cursor_state {
111 CURSOR_DEFAULT = 0,
112 CURSOR_WRAPNEXT = 1,
113 CURSOR_ORIGIN = 2
114 };
115
116 enum term_mode {
117 MODE_WRAP = 1,
118 MODE_INSERT = 2,
119 MODE_APPKEYPAD = 4,
120 MODE_ALTSCREEN = 8,
121 MODE_CRLF = 16,
122 MODE_MOUSEBTN = 32,
123 MODE_MOUSEMOTION = 64,
124 MODE_REVERSE = 128,
125 MODE_KBDLOCK = 256,
126 MODE_HIDE = 512,
127 MODE_ECHO = 1024,
128 MODE_APPCURSOR = 2048,
129 MODE_MOUSESGR = 4096,
130 MODE_8BIT = 8192,
131 MODE_BLINK = 16384,
132 MODE_FBLINK = 32768,
133 MODE_FOCUS = 65536,
134 MODE_MOUSEX10 = 131072,
135 MODE_MOUSEMANY = 262144,
136 MODE_BRCKTPASTE = 524288,
137 MODE_PRINT = 1048576,
138 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
139 |MODE_MOUSEMANY,
140 };
141
142 enum charset {
143 CS_GRAPHIC0,
144 CS_GRAPHIC1,
145 CS_UK,
146 CS_USA,
147 CS_MULTI,
148 CS_GER,
149 CS_FIN
150 };
151
152 enum escape_state {
153 ESC_START = 1,
154 ESC_CSI = 2,
155 ESC_STR = 4, /* DCS, OSC, PM, APC */
156 ESC_ALTCHARSET = 8,
157 ESC_STR_END = 16, /* a final string was encountered */
158 ESC_TEST = 32, /* Enter in test mode */
159 };
160
161 enum window_state {
162 WIN_VISIBLE = 1,
163 WIN_REDRAW = 2,
164 WIN_FOCUSED = 4
165 };
166
167 enum selection_type {
168 SEL_REGULAR = 1,
169 SEL_RECTANGULAR = 2
170 };
171
172 enum selection_snap {
173 SNAP_WORD = 1,
174 SNAP_LINE = 2
175 };
176
177 typedef unsigned char uchar;
178 typedef unsigned int uint;
179 typedef unsigned long ulong;
180 typedef unsigned short ushort;
181
182 typedef XftDraw *Draw;
183 typedef XftColor Colour;
184 typedef Colormap Colourmap;
185
186 typedef struct {
187 char c[UTF_SIZ]; /* character code */
188 ushort mode; /* attribute flags */
189 uint32_t fg; /* foreground */
190 uint32_t bg; /* background */
191 } Glyph;
192
193 typedef Glyph *Line;
194
195 typedef struct {
196 Glyph attr; /* current char attributes */
197 int x;
198 int y;
199 char state;
200 } TCursor;
201
202 /* CSI Escape sequence structs */
203 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
204 typedef struct {
205 char buf[ESC_BUF_SIZ]; /* raw string */
206 int len; /* raw string length */
207 char priv;
208 int arg[ESC_ARG_SIZ];
209 int narg; /* nb of args */
210 char mode;
211 } CSIEscape;
212
213 /* STR Escape sequence structs */
214 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
215 typedef struct {
216 char type; /* ESC type ... */
217 char buf[STR_BUF_SIZ]; /* raw string */
218 int len; /* raw string length */
219 char *args[STR_ARG_SIZ];
220 int narg; /* nb of args */
221 } STREscape;
222
223 /* Internal representation of the screen */
224 typedef struct {
225 int row; /* nb row */
226 int col; /* nb col */
227 Line *line; /* screen */
228 Line *alt; /* alternate screen */
229 bool *dirty; /* dirtyness of lines */
230 TCursor c; /* cursor */
231 int top; /* top scroll limit */
232 int bot; /* bottom scroll limit */
233 int mode; /* terminal mode flags */
234 int esc; /* escape state flags */
235 char trantbl[4]; /* charset table translation */
236 int charset; /* current charset */
237 int icharset; /* selected charset for sequence */
238 bool numlock; /* lock numbers in keyboard */
239 bool *tabs;
240 } Term;
241
242 /* Purely graphic info */
243 typedef struct {
244 Display *dpy;
245 Colourmap cmap;
246 Window win;
247 Drawable buf;
248 Atom xembed, wmdeletewin, netwmname, netwmpid;
249 XIM xim;
250 XIC xic;
251 Draw draw;
252 Visual *vis;
253 XSetWindowAttributes attrs;
254 int scr;
255 bool isfixed; /* is fixed geometry? */
256 int l, t; /* left and top offset */
257 int gm; /* geometry mask */
258 int tw, th; /* tty width and height */
259 int w, h; /* window width and height */
260 int ch; /* char height */
261 int cw; /* char width */
262 char state; /* focus, redraw, visible */
263 } XWindow;
264
265 typedef struct {
266 uint b;
267 uint mask;
268 char *s;
269 } Mousekey;
270
271 typedef struct {
272 KeySym k;
273 uint mask;
274 char *s;
275 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
276 signed char appkey; /* application keypad */
277 signed char appcursor; /* application cursor */
278 signed char crlf; /* crlf mode */
279 } Key;
280
281 typedef struct {
282 int mode;
283 int type;
284 int snap;
285 /*
286 * Selection variables:
287 * nb – normalized coordinates of the beginning of the selection
288 * ne – normalized coordinates of the end of the selection
289 * ob – original coordinates of the beginning of the selection
290 * oe – original coordinates of the end of the selection
291 */
292 struct {
293 int x, y;
294 } nb, ne, ob, oe;
295
296 char *clip;
297 Atom xtarget;
298 bool alt;
299 struct timeval tclick1;
300 struct timeval tclick2;
301 } Selection;
302
303 typedef union {
304 int i;
305 uint ui;
306 float f;
307 const void *v;
308 } Arg;
309
310 typedef struct {
311 uint mod;
312 KeySym keysym;
313 void (*func)(const Arg *);
314 const Arg arg;
315 } Shortcut;
316
317 /* function definitions used in config.h */
318 static void clippaste(const Arg *);
319 static void numlock(const Arg *);
320 static void selpaste(const Arg *);
321 static void xzoom(const Arg *);
322 static void printsel(const Arg *);
323 static void printscreen(const Arg *) ;
324 static void toggleprinter(const Arg *);
325
326 /* Config.h for applying patches and the configuration. */
327 #include "config.h"
328
329 /* Font structure */
330 typedef struct {
331 int height;
332 int width;
333 int ascent;
334 int descent;
335 short lbearing;
336 short rbearing;
337 XftFont *match;
338 FcFontSet *set;
339 FcPattern *pattern;
340 } Font;
341
342 /* Drawing Context */
343 typedef struct {
344 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
345 Font font, bfont, ifont, ibfont;
346 GC gc;
347 } DC;
348
349 static void die(const char *, ...);
350 static void draw(void);
351 static void redraw(int);
352 static void drawregion(int, int, int, int);
353 static void execsh(void);
354 static void sigchld(int);
355 static void run(void);
356
357 static void csidump(void);
358 static void csihandle(void);
359 static void csiparse(void);
360 static void csireset(void);
361 static void strdump(void);
362 static void strhandle(void);
363 static void strparse(void);
364 static void strreset(void);
365
366 static int tattrset(int);
367 static void tprinter(char *, size_t);
368 static void tdumpsel(void);
369 static void tdumpline(int);
370 static void tdump(void);
371 static void tclearregion(int, int, int, int);
372 static void tcursor(int);
373 static void tdeletechar(int);
374 static void tdeleteline(int);
375 static void tinsertblank(int);
376 static void tinsertblankline(int);
377 static void tmoveto(int, int);
378 static void tmoveato(int, int);
379 static void tnew(int, int);
380 static void tnewline(int);
381 static void tputtab(int);
382 static void tputc(char *, int);
383 static void treset(void);
384 static int tresize(int, int);
385 static void tscrollup(int, int);
386 static void tscrolldown(int, int);
387 static void tsetattr(int *, int);
388 static void tsetchar(char *, Glyph *, int, int);
389 static void tsetscroll(int, int);
390 static void tswapscreen(void);
391 static void tsetdirt(int, int);
392 static void tsetdirtattr(int);
393 static void tsetmode(bool, bool, int *, int);
394 static void tfulldirt(void);
395 static void techo(char *, int);
396 static bool tcontrolcode(uchar );
397 static int32_t tdefcolor(int *, int *, int);
398 static void tselcs(void);
399 static void tdeftran(char);
400 static inline bool match(uint, uint);
401 static void ttynew(void);
402 static void ttyread(void);
403 static void ttyresize(void);
404 static void ttysend(char *, size_t);
405 static void ttywrite(const char *, size_t);
406
407 static void xdraws(char *, Glyph, int, int, int, int);
408 static void xhints(void);
409 static void xclear(int, int, int, int);
410 static void xdrawcursor(void);
411 static void xinit(void);
412 static void xloadcols(void);
413 static int xsetcolorname(int, const char *);
414 static int xgeommasktogravity(int);
415 static int xloadfont(Font *, FcPattern *);
416 static void xloadfonts(char *, double);
417 static int xloadfontset(Font *);
418 static void xsettitle(char *);
419 static void xresettitle(void);
420 static void xsetpointermotion(int);
421 static void xseturgency(int);
422 static void xsetsel(char *);
423 static void xtermclear(int, int, int, int);
424 static void xunloadfont(Font *);
425 static void xunloadfonts(void);
426 static void xresize(int, int);
427
428 static void expose(XEvent *);
429 static void visibility(XEvent *);
430 static void unmap(XEvent *);
431 static char *kmap(KeySym, uint);
432 static void kpress(XEvent *);
433 static void cmessage(XEvent *);
434 static void cresize(int, int);
435 static void resize(XEvent *);
436 static void focus(XEvent *);
437 static void brelease(XEvent *);
438 static void bpress(XEvent *);
439 static void bmotion(XEvent *);
440 static void selnotify(XEvent *);
441 static void selclear(XEvent *);
442 static void selrequest(XEvent *);
443
444 static void selinit(void);
445 static void selsort(void);
446 static inline bool selected(int, int);
447 static char *getsel(void);
448 static void selcopy(void);
449 static void selscroll(int, int);
450 static void selsnap(int, int *, int *, int);
451
452 static size_t utf8decode(char *, long *, size_t);
453 static long utf8decodebyte(char, size_t *);
454 static size_t utf8encode(long, char *, size_t);
455 static char utf8encodebyte(long, size_t);
456 static size_t utf8len(char *);
457 static size_t utf8validate(long *, size_t);
458
459 static ssize_t xwrite(int, const char *, size_t);
460 static void *xmalloc(size_t);
461 static void *xrealloc(void *, size_t);
462 static char *xstrdup(char *);
463
464 static void (*handler[LASTEvent])(XEvent *) = {
465 [KeyPress] = kpress,
466 [ClientMessage] = cmessage,
467 [ConfigureNotify] = resize,
468 [VisibilityNotify] = visibility,
469 [UnmapNotify] = unmap,
470 [Expose] = expose,
471 [FocusIn] = focus,
472 [FocusOut] = focus,
473 [MotionNotify] = bmotion,
474 [ButtonPress] = bpress,
475 [ButtonRelease] = brelease,
476 [SelectionClear] = selclear,
477 [SelectionNotify] = selnotify,
478 [SelectionRequest] = selrequest,
479 };
480
481 /* Globals */
482 static DC dc;
483 static XWindow xw;
484 static Term term;
485 static CSIEscape csiescseq;
486 static STREscape strescseq;
487 static int cmdfd;
488 static pid_t pid;
489 static Selection sel;
490 static int iofd = STDOUT_FILENO;
491 static char **opt_cmd = NULL;
492 static char *opt_io = NULL;
493 static char *opt_title = NULL;
494 static char *opt_embed = NULL;
495 static char *opt_class = NULL;
496 static char *opt_font = NULL;
497 static int oldbutton = 3; /* button event on startup: 3 = release */
498
499 static char *usedfont = NULL;
500 static double usedfontsize = 0;
501
502 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
503 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
504 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
505 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
506
507 /* Font Ring Cache */
508 enum {
509 FRC_NORMAL,
510 FRC_ITALIC,
511 FRC_BOLD,
512 FRC_ITALICBOLD
513 };
514
515 typedef struct {
516 XftFont *font;
517 int flags;
518 } Fontcache;
519
520 /* Fontcache is an array now. A new font will be appended to the array. */
521 static Fontcache frc[16];
522 static int frclen = 0;
523
524 ssize_t
525 xwrite(int fd, const char *s, size_t len) {
526 size_t aux = len;
527
528 while(len > 0) {
529 ssize_t r = write(fd, s, len);
530 if(r < 0)
531 return r;
532 len -= r;
533 s += r;
534 }
535 return aux;
536 }
537
538 void *
539 xmalloc(size_t len) {
540 void *p = malloc(len);
541
542 if(!p)
543 die("Out of memory\n");
544
545 return p;
546 }
547
548 void *
549 xrealloc(void *p, size_t len) {
550 if((p = realloc(p, len)) == NULL)
551 die("Out of memory\n");
552
553 return p;
554 }
555
556 char *
557 xstrdup(char *s) {
558 if((s = strdup(s)) == NULL)
559 die("Out of memory\n");
560
561 return s;
562 }
563
564 size_t
565 utf8decode(char *c, long *u, size_t clen) {
566 size_t i, j, len, type;
567 long udecoded;
568
569 *u = UTF_INVALID;
570 if(!clen)
571 return 0;
572 udecoded = utf8decodebyte(c[0], &len);
573 if(!BETWEEN(len, 1, UTF_SIZ))
574 return 1;
575 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
576 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
577 if(type != 0)
578 return j;
579 }
580 if(j < len)
581 return 0;
582 *u = udecoded;
583 utf8validate(u, len);
584 return len;
585 }
586
587 long
588 utf8decodebyte(char c, size_t *i) {
589 for(*i = 0; *i < LEN(utfmask); ++(*i))
590 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
591 return (uchar)c & ~utfmask[*i];
592 return 0;
593 }
594
595 size_t
596 utf8encode(long u, char *c, size_t clen) {
597 size_t len, i;
598
599 len = utf8validate(&u, 0);
600 if(clen < len)
601 return 0;
602 for(i = len - 1; i != 0; --i) {
603 c[i] = utf8encodebyte(u, 0);
604 u >>= 6;
605 }
606 c[0] = utf8encodebyte(u, len);
607 return len;
608 }
609
610 char
611 utf8encodebyte(long u, size_t i) {
612 return utfbyte[i] | (u & ~utfmask[i]);
613 }
614
615 size_t
616 utf8len(char *c) {
617 return utf8decode(c, &(long){0}, UTF_SIZ);
618 }
619
620 size_t
621 utf8validate(long *u, size_t i) {
622 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
623 *u = UTF_INVALID;
624 for(i = 1; *u > utfmax[i]; ++i)
625 ;
626 return i;
627 }
628
629 static void
630 selinit(void) {
631 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
632 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
633 sel.mode = 0;
634 sel.ob.x = -1;
635 sel.clip = NULL;
636 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
637 if(sel.xtarget == None)
638 sel.xtarget = XA_STRING;
639 }
640
641 static int
642 x2col(int x) {
643 x -= borderpx;
644 x /= xw.cw;
645
646 return LIMIT(x, 0, term.col-1);
647 }
648
649 static int
650 y2row(int y) {
651 y -= borderpx;
652 y /= xw.ch;
653
654 return LIMIT(y, 0, term.row-1);
655 }
656
657 static void
658 selsort(void) {
659 if(sel.ob.y == sel.oe.y) {
660 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
661 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
662 } else {
663 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
664 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
665 }
666 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
667 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
668 }
669
670 static inline bool
671 selected(int x, int y) {
672 if(sel.ne.y == y && sel.nb.y == y)
673 return BETWEEN(x, sel.nb.x, sel.ne.x);
674
675 if(sel.type == SEL_RECTANGULAR) {
676 return ((sel.nb.y <= y && y <= sel.ne.y)
677 && (sel.nb.x <= x && x <= sel.ne.x));
678 }
679
680 return ((sel.nb.y < y && y < sel.ne.y)
681 || (y == sel.ne.y && x <= sel.ne.x))
682 || (y == sel.nb.y && x >= sel.nb.x
683 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
684 }
685
686 void
687 selsnap(int mode, int *x, int *y, int direction) {
688 int i;
689
690 switch(mode) {
691 case SNAP_WORD:
692 /*
693 * Snap around if the word wraps around at the end or
694 * beginning of a line.
695 */
696 for(;;) {
697 if(direction < 0 && *x <= 0) {
698 if(*y > 0 && term.line[*y - 1][term.col-1].mode
699 & ATTR_WRAP) {
700 *y -= 1;
701 *x = term.col-1;
702 } else {
703 break;
704 }
705 }
706 if(direction > 0 && *x >= term.col-1) {
707 if(*y < term.row-1 && term.line[*y][*x].mode
708 & ATTR_WRAP) {
709 *y += 1;
710 *x = 0;
711 } else {
712 break;
713 }
714 }
715
716 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
717 *x += direction;
718 continue;
719 }
720
721 if(strchr(worddelimiters,
722 term.line[*y][*x+direction].c[0])) {
723 break;
724 }
725
726 *x += direction;
727 }
728 break;
729 case SNAP_LINE:
730 /*
731 * Snap around if the the previous line or the current one
732 * has set ATTR_WRAP at its end. Then the whole next or
733 * previous line will be selected.
734 */
735 *x = (direction < 0) ? 0 : term.col - 1;
736 if(direction < 0 && *y > 0) {
737 for(; *y > 0; *y += direction) {
738 if(!(term.line[*y-1][term.col-1].mode
739 & ATTR_WRAP)) {
740 break;
741 }
742 }
743 } else if(direction > 0 && *y < term.row-1) {
744 for(; *y < term.row; *y += direction) {
745 if(!(term.line[*y][term.col-1].mode
746 & ATTR_WRAP)) {
747 break;
748 }
749 }
750 }
751 break;
752 default:
753 /*
754 * Select the whole line when the end of line is reached.
755 */
756 if(direction > 0) {
757 i = term.col;
758 while(--i > 0 && term.line[*y][i].c[0] == ' ')
759 /* nothing */;
760 if(i > 0 && i < *x)
761 *x = term.col - 1;
762 }
763 break;
764 }
765 }
766
767 void
768 getbuttoninfo(XEvent *e) {
769 int type;
770 uint state = e->xbutton.state &~Button1Mask;
771
772 sel.alt = IS_SET(MODE_ALTSCREEN);
773
774 sel.oe.x = x2col(e->xbutton.x);
775 sel.oe.y = y2row(e->xbutton.y);
776
777 if(sel.ob.y < sel.oe.y
778 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
779 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
780 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
781 } else {
782 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
783 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
784 }
785 selsort();
786
787 sel.type = SEL_REGULAR;
788 for(type = 1; type < LEN(selmasks); ++type) {
789 if(match(selmasks[type], state)) {
790 sel.type = type;
791 break;
792 }
793 }
794 }
795
796 void
797 mousereport(XEvent *e) {
798 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
799 button = e->xbutton.button, state = e->xbutton.state,
800 len;
801 char buf[40];
802 static int ox, oy;
803
804 /* from urxvt */
805 if(e->xbutton.type == MotionNotify) {
806 if(x == ox && y == oy)
807 return;
808 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
809 return;
810 /* MOUSE_MOTION: no reporting if no button is pressed */
811 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
812 return;
813
814 button = oldbutton + 32;
815 ox = x;
816 oy = y;
817 } else {
818 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
819 button = 3;
820 } else {
821 button -= Button1;
822 if(button >= 3)
823 button += 64 - 3;
824 }
825 if(e->xbutton.type == ButtonPress) {
826 oldbutton = button;
827 ox = x;
828 oy = y;
829 } else if(e->xbutton.type == ButtonRelease) {
830 oldbutton = 3;
831 /* MODE_MOUSEX10: no button release reporting */
832 if(IS_SET(MODE_MOUSEX10))
833 return;
834 }
835 }
836
837 if(!IS_SET(MODE_MOUSEX10)) {
838 button += (state & ShiftMask ? 4 : 0)
839 + (state & Mod4Mask ? 8 : 0)
840 + (state & ControlMask ? 16 : 0);
841 }
842
843 len = 0;
844 if(IS_SET(MODE_MOUSESGR)) {
845 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
846 button, x+1, y+1,
847 e->xbutton.type == ButtonRelease ? 'm' : 'M');
848 } else if(x < 223 && y < 223) {
849 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
850 32+button, 32+x+1, 32+y+1);
851 } else {
852 return;
853 }
854
855 ttywrite(buf, len);
856 }
857
858 void
859 bpress(XEvent *e) {
860 struct timeval now;
861 Mousekey *mk;
862
863 if(IS_SET(MODE_MOUSE)) {
864 mousereport(e);
865 return;
866 }
867
868 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
869 if(e->xbutton.button == mk->b
870 && match(mk->mask, e->xbutton.state)) {
871 ttysend(mk->s, strlen(mk->s));
872 return;
873 }
874 }
875
876 if(e->xbutton.button == Button1) {
877 gettimeofday(&now, NULL);
878
879 /* Clear previous selection, logically and visually. */
880 selclear(NULL);
881 sel.mode = 1;
882 sel.type = SEL_REGULAR;
883 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
884 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
885
886 /*
887 * If the user clicks below predefined timeouts specific
888 * snapping behaviour is exposed.
889 */
890 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
891 sel.snap = SNAP_LINE;
892 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
893 sel.snap = SNAP_WORD;
894 } else {
895 sel.snap = 0;
896 }
897 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
898 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
899 selsort();
900
901 /*
902 * Draw selection, unless it's regular and we don't want to
903 * make clicks visible
904 */
905 if(sel.snap != 0) {
906 sel.mode++;
907 tsetdirt(sel.nb.y, sel.ne.y);
908 }
909 sel.tclick2 = sel.tclick1;
910 sel.tclick1 = now;
911 }
912 }
913
914 char *
915 getsel(void) {
916 char *str, *ptr;
917 int x, y, bufsize, size, i, ex;
918 Glyph *gp, *last;
919
920 if(sel.ob.x == -1) {
921 str = NULL;
922 } else {
923 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
924 ptr = str = xmalloc(bufsize);
925
926 /* append every set & selected glyph to the selection */
927 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
928 gp = &term.line[y][0];
929 last = &gp[term.col-1];
930
931 while(last >= gp && !(selected(last - gp, y) &&
932 strcmp(last->c, " ") != 0)) {
933 --last;
934 }
935
936 for(x = 0; gp <= last; x++, ++gp) {
937 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
938 continue;
939
940 size = utf8len(gp->c);
941 memcpy(ptr, gp->c, size);
942 ptr += size;
943 }
944
945 /*
946 * Copy and pasting of line endings is inconsistent
947 * in the inconsistent terminal and GUI world.
948 * The best solution seems like to produce '\n' when
949 * something is copied from st and convert '\n' to
950 * '\r', when something to be pasted is received by
951 * st.
952 * FIXME: Fix the computer world.
953 */
954 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
955 *ptr++ = '\n';
956
957 /*
958 * If the last selected line expands in the selection
959 * after the visible text '\n' is appended.
960 */
961 if(y == sel.ne.y) {
962 i = term.col;
963 while(--i > 0 && term.line[y][i].c[0] == ' ')
964 /* nothing */;
965 ex = sel.ne.x;
966 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
967 ex = sel.nb.x;
968 if(i < ex)
969 *ptr++ = '\n';
970 }
971 }
972 *ptr = 0;
973 }
974 return str;
975 }
976
977 void
978 selcopy(void) {
979 xsetsel(getsel());
980 }
981
982 void
983 selnotify(XEvent *e) {
984 ulong nitems, ofs, rem;
985 int format;
986 uchar *data, *last, *repl;
987 Atom type;
988
989 ofs = 0;
990 do {
991 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
992 False, AnyPropertyType, &type, &format,
993 &nitems, &rem, &data)) {
994 fprintf(stderr, "Clipboard allocation failed\n");
995 return;
996 }
997
998 /*
999 * As seen in getsel:
1000 * Line endings are inconsistent in the terminal and GUI world
1001 * copy and pasting. When receiving some selection data,
1002 * replace all '\n' with '\r'.
1003 * FIXME: Fix the computer world.
1004 */
1005 repl = data;
1006 last = data + nitems * format / 8;
1007 while((repl = memchr(repl, '\n', last - repl))) {
1008 *repl++ = '\r';
1009 }
1010
1011 if(IS_SET(MODE_BRCKTPASTE))
1012 ttywrite("\033[200~", 6);
1013 ttysend((char *)data, nitems * format / 8);
1014 if(IS_SET(MODE_BRCKTPASTE))
1015 ttywrite("\033[201~", 6);
1016 XFree(data);
1017 /* number of 32-bit chunks returned */
1018 ofs += nitems * format / 32;
1019 } while(rem > 0);
1020 }
1021
1022 void
1023 selpaste(const Arg *dummy) {
1024 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1025 xw.win, CurrentTime);
1026 }
1027
1028 void
1029 clippaste(const Arg *dummy) {
1030 Atom clipboard;
1031
1032 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1033 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1034 xw.win, CurrentTime);
1035 }
1036
1037 void
1038 selclear(XEvent *e) {
1039 if(sel.ob.x == -1)
1040 return;
1041 sel.ob.x = -1;
1042 tsetdirt(sel.nb.y, sel.ne.y);
1043 }
1044
1045 void
1046 selrequest(XEvent *e) {
1047 XSelectionRequestEvent *xsre;
1048 XSelectionEvent xev;
1049 Atom xa_targets, string;
1050
1051 xsre = (XSelectionRequestEvent *) e;
1052 xev.type = SelectionNotify;
1053 xev.requestor = xsre->requestor;
1054 xev.selection = xsre->selection;
1055 xev.target = xsre->target;
1056 xev.time = xsre->time;
1057 /* reject */
1058 xev.property = None;
1059
1060 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1061 if(xsre->target == xa_targets) {
1062 /* respond with the supported type */
1063 string = sel.xtarget;
1064 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1065 XA_ATOM, 32, PropModeReplace,
1066 (uchar *) &string, 1);
1067 xev.property = xsre->property;
1068 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1069 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1070 xsre->target, 8, PropModeReplace,
1071 (uchar *) sel.clip, strlen(sel.clip));
1072 xev.property = xsre->property;
1073 }
1074
1075 /* all done, send a notification to the listener */
1076 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1077 fprintf(stderr, "Error sending SelectionNotify event\n");
1078 }
1079
1080 void
1081 xsetsel(char *str) {
1082 /* register the selection for both the clipboard and the primary */
1083 Atom clipboard;
1084
1085 free(sel.clip);
1086 sel.clip = str;
1087
1088 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1089
1090 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1091 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1092 }
1093
1094 void
1095 brelease(XEvent *e) {
1096 if(IS_SET(MODE_MOUSE)) {
1097 mousereport(e);
1098 return;
1099 }
1100
1101 if(e->xbutton.button == Button2) {
1102 selpaste(NULL);
1103 } else if(e->xbutton.button == Button1) {
1104 if(sel.mode < 2) {
1105 selclear(NULL);
1106 } else {
1107 getbuttoninfo(e);
1108 selcopy();
1109 }
1110 sel.mode = 0;
1111 tsetdirt(sel.nb.y, sel.ne.y);
1112 }
1113 }
1114
1115 void
1116 bmotion(XEvent *e) {
1117 int oldey, oldex, oldsby, oldsey;
1118
1119 if(IS_SET(MODE_MOUSE)) {
1120 mousereport(e);
1121 return;
1122 }
1123
1124 if(!sel.mode)
1125 return;
1126
1127 sel.mode++;
1128 oldey = sel.oe.y;
1129 oldex = sel.oe.x;
1130 oldsby = sel.nb.y;
1131 oldsey = sel.ne.y;
1132 getbuttoninfo(e);
1133
1134 if(oldey != sel.oe.y || oldex != sel.oe.x)
1135 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1136 }
1137
1138 void
1139 die(const char *errstr, ...) {
1140 va_list ap;
1141
1142 va_start(ap, errstr);
1143 vfprintf(stderr, errstr, ap);
1144 va_end(ap);
1145 exit(EXIT_FAILURE);
1146 }
1147
1148 void
1149 execsh(void) {
1150 char **args;
1151 char *envshell = getenv("SHELL");
1152 const struct passwd *pass = getpwuid(getuid());
1153 char buf[sizeof(long) * 8 + 1];
1154
1155 unsetenv("COLUMNS");
1156 unsetenv("LINES");
1157 unsetenv("TERMCAP");
1158
1159 if(pass) {
1160 setenv("LOGNAME", pass->pw_name, 1);
1161 setenv("USER", pass->pw_name, 1);
1162 setenv("SHELL", pass->pw_shell, 0);
1163 setenv("HOME", pass->pw_dir, 0);
1164 }
1165
1166 snprintf(buf, sizeof(buf), "%lu", xw.win);
1167 setenv("WINDOWID", buf, 1);
1168
1169 signal(SIGCHLD, SIG_DFL);
1170 signal(SIGHUP, SIG_DFL);
1171 signal(SIGINT, SIG_DFL);
1172 signal(SIGQUIT, SIG_DFL);
1173 signal(SIGTERM, SIG_DFL);
1174 signal(SIGALRM, SIG_DFL);
1175
1176 DEFAULT(envshell, shell);
1177 setenv("TERM", termname, 1);
1178 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1179 execvp(args[0], args);
1180 exit(EXIT_FAILURE);
1181 }
1182
1183 void
1184 sigchld(int a) {
1185 int stat = 0;
1186
1187 if(waitpid(pid, &stat, 0) < 0)
1188 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1189
1190 if(WIFEXITED(stat)) {
1191 exit(WEXITSTATUS(stat));
1192 } else {
1193 exit(EXIT_FAILURE);
1194 }
1195 }
1196
1197 void
1198 ttynew(void) {
1199 int m, s;
1200 struct winsize w = {term.row, term.col, 0, 0};
1201
1202 /* seems to work fine on linux, openbsd and freebsd */
1203 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1204 die("openpty failed: %s\n", strerror(errno));
1205
1206 switch(pid = fork()) {
1207 case -1:
1208 die("fork failed\n");
1209 break;
1210 case 0:
1211 setsid(); /* create a new process group */
1212 dup2(s, STDIN_FILENO);
1213 dup2(s, STDOUT_FILENO);
1214 dup2(s, STDERR_FILENO);
1215 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1216 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1217 close(s);
1218 close(m);
1219 execsh();
1220 break;
1221 default:
1222 close(s);
1223 cmdfd = m;
1224 signal(SIGCHLD, sigchld);
1225 if(opt_io) {
1226 term.mode |= MODE_PRINT;
1227 iofd = (!strcmp(opt_io, "-")) ?
1228 STDOUT_FILENO :
1229 open(opt_io, O_WRONLY | O_CREAT, 0666);
1230 if(iofd < 0) {
1231 fprintf(stderr, "Error opening %s:%s\n",
1232 opt_io, strerror(errno));
1233 }
1234 }
1235 break;
1236 }
1237 }
1238
1239 void
1240 dump(char c) {
1241 static int col;
1242
1243 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1244 if(++col % 10 == 0)
1245 fprintf(stderr, "\n");
1246 }
1247
1248 void
1249 ttyread(void) {
1250 static char buf[BUFSIZ];
1251 static int buflen = 0;
1252 char *ptr;
1253 char s[UTF_SIZ];
1254 int charsize; /* size of utf8 char in bytes */
1255 long unicodep;
1256 int ret;
1257
1258 /* append read bytes to unprocessed bytes */
1259 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1260 die("Couldn't read from shell: %s\n", strerror(errno));
1261
1262 /* process every complete utf8 char */
1263 buflen += ret;
1264 ptr = buf;
1265 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1266 utf8encode(unicodep, s, UTF_SIZ);
1267 tputc(s, charsize);
1268 ptr += charsize;
1269 buflen -= charsize;
1270 }
1271
1272 /* keep any uncomplete utf8 char for the next call */
1273 memmove(buf, ptr, buflen);
1274 }
1275
1276 void
1277 ttywrite(const char *s, size_t n) {
1278 if(xwrite(cmdfd, s, n) == -1)
1279 die("write error on tty: %s\n", strerror(errno));
1280 }
1281
1282 void
1283 ttysend(char *s, size_t n) {
1284 ttywrite(s, n);
1285 if(IS_SET(MODE_ECHO))
1286 techo(s, n);
1287 }
1288
1289 void
1290 ttyresize(void) {
1291 struct winsize w;
1292
1293 w.ws_row = term.row;
1294 w.ws_col = term.col;
1295 w.ws_xpixel = xw.tw;
1296 w.ws_ypixel = xw.th;
1297 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1298 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1299 }
1300
1301 int
1302 tattrset(int attr) {
1303 int i, j;
1304
1305 for(i = 0; i < term.row-1; i++) {
1306 for(j = 0; j < term.col-1; j++) {
1307 if(term.line[i][j].mode & attr)
1308 return 1;
1309 }
1310 }
1311
1312 return 0;
1313 }
1314
1315 void
1316 tsetdirt(int top, int bot) {
1317 int i;
1318
1319 LIMIT(top, 0, term.row-1);
1320 LIMIT(bot, 0, term.row-1);
1321
1322 for(i = top; i <= bot; i++)
1323 term.dirty[i] = 1;
1324 }
1325
1326 void
1327 tsetdirtattr(int attr) {
1328 int i, j;
1329
1330 for(i = 0; i < term.row-1; i++) {
1331 for(j = 0; j < term.col-1; j++) {
1332 if(term.line[i][j].mode & attr) {
1333 tsetdirt(i, i);
1334 break;
1335 }
1336 }
1337 }
1338 }
1339
1340 void
1341 tfulldirt(void) {
1342 tsetdirt(0, term.row-1);
1343 }
1344
1345 void
1346 tcursor(int mode) {
1347 static TCursor c[2];
1348 bool alt = IS_SET(MODE_ALTSCREEN);
1349
1350 if(mode == CURSOR_SAVE) {
1351 c[alt] = term.c;
1352 } else if(mode == CURSOR_LOAD) {
1353 term.c = c[alt];
1354 tmoveto(c[alt].x, c[alt].y);
1355 }
1356 }
1357
1358 void
1359 treset(void) {
1360 uint i;
1361
1362 term.c = (TCursor){{
1363 .mode = ATTR_NULL,
1364 .fg = defaultfg,
1365 .bg = defaultbg
1366 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1367
1368 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1369 for(i = tabspaces; i < term.col; i += tabspaces)
1370 term.tabs[i] = 1;
1371 term.top = 0;
1372 term.bot = term.row - 1;
1373 term.mode = MODE_WRAP;
1374 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1375 term.charset = 0;
1376
1377 tclearregion(0, 0, term.col-1, term.row-1);
1378 tmoveto(0, 0);
1379 tcursor(CURSOR_SAVE);
1380 }
1381
1382 void
1383 tnew(int col, int row) {
1384 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1385 tresize(col, row);
1386 term.numlock = 1;
1387
1388 treset();
1389 }
1390
1391 void
1392 tswapscreen(void) {
1393 Line *tmp = term.line;
1394
1395 term.line = term.alt;
1396 term.alt = tmp;
1397 term.mode ^= MODE_ALTSCREEN;
1398 tfulldirt();
1399 }
1400
1401 void
1402 tscrolldown(int orig, int n) {
1403 int i;
1404 Line temp;
1405
1406 LIMIT(n, 0, term.bot-orig+1);
1407
1408 tsetdirt(orig, term.bot-n);
1409 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1410
1411 for(i = term.bot; i >= orig+n; i--) {
1412 temp = term.line[i];
1413 term.line[i] = term.line[i-n];
1414 term.line[i-n] = temp;
1415 }
1416
1417 selscroll(orig, n);
1418 }
1419
1420 void
1421 tscrollup(int orig, int n) {
1422 int i;
1423 Line temp;
1424
1425 LIMIT(n, 0, term.bot-orig+1);
1426
1427 tclearregion(0, orig, term.col-1, orig+n-1);
1428 tsetdirt(orig+n, term.bot);
1429
1430 for(i = orig; i <= term.bot-n; i++) {
1431 temp = term.line[i];
1432 term.line[i] = term.line[i+n];
1433 term.line[i+n] = temp;
1434 }
1435
1436 selscroll(orig, -n);
1437 }
1438
1439 void
1440 selscroll(int orig, int n) {
1441 if(sel.ob.x == -1)
1442 return;
1443
1444 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1445 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1446 selclear(NULL);
1447 return;
1448 }
1449 if(sel.type == SEL_RECTANGULAR) {
1450 if(sel.ob.y < term.top)
1451 sel.ob.y = term.top;
1452 if(sel.oe.y > term.bot)
1453 sel.oe.y = term.bot;
1454 } else {
1455 if(sel.ob.y < term.top) {
1456 sel.ob.y = term.top;
1457 sel.ob.x = 0;
1458 }
1459 if(sel.oe.y > term.bot) {
1460 sel.oe.y = term.bot;
1461 sel.oe.x = term.col;
1462 }
1463 }
1464 selsort();
1465 }
1466 }
1467
1468 void
1469 tnewline(int first_col) {
1470 int y = term.c.y;
1471
1472 if(y == term.bot) {
1473 tscrollup(term.top, 1);
1474 } else {
1475 y++;
1476 }
1477 tmoveto(first_col ? 0 : term.c.x, y);
1478 }
1479
1480 void
1481 csiparse(void) {
1482 char *p = csiescseq.buf, *np;
1483 long int v;
1484
1485 csiescseq.narg = 0;
1486 if(*p == '?') {
1487 csiescseq.priv = 1;
1488 p++;
1489 }
1490
1491 csiescseq.buf[csiescseq.len] = '\0';
1492 while(p < csiescseq.buf+csiescseq.len) {
1493 np = NULL;
1494 v = strtol(p, &np, 10);
1495 if(np == p)
1496 v = 0;
1497 if(v == LONG_MAX || v == LONG_MIN)
1498 v = -1;
1499 csiescseq.arg[csiescseq.narg++] = v;
1500 p = np;
1501 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1502 break;
1503 p++;
1504 }
1505 csiescseq.mode = *p;
1506 }
1507
1508 /* for absolute user moves, when decom is set */
1509 void
1510 tmoveato(int x, int y) {
1511 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1512 }
1513
1514 void
1515 tmoveto(int x, int y) {
1516 int miny, maxy;
1517
1518 if(term.c.state & CURSOR_ORIGIN) {
1519 miny = term.top;
1520 maxy = term.bot;
1521 } else {
1522 miny = 0;
1523 maxy = term.row - 1;
1524 }
1525 LIMIT(x, 0, term.col-1);
1526 LIMIT(y, miny, maxy);
1527 term.c.state &= ~CURSOR_WRAPNEXT;
1528 term.c.x = x;
1529 term.c.y = y;
1530 }
1531
1532 void
1533 tsetchar(char *c, Glyph *attr, int x, int y) {
1534 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1535 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1536 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1537 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1538 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1539 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1540 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1541 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1542 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1543 };
1544
1545 /*
1546 * The table is proudly stolen from rxvt.
1547 */
1548 if(attr->mode & ATTR_GFX) {
1549 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1550 c = vt100_0[c[0] - 0x41];
1551 }
1552 }
1553
1554 if(term.line[y][x].mode & ATTR_WIDE) {
1555 if(x+1 < term.col) {
1556 term.line[y][x+1].c[0] = ' ';
1557 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1558 }
1559 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1560 term.line[y][x-1].c[0] = ' ';
1561 term.line[y][x-1].mode &= ~ATTR_WIDE;
1562 }
1563
1564 term.dirty[y] = 1;
1565 term.line[y][x] = *attr;
1566 memcpy(term.line[y][x].c, c, UTF_SIZ);
1567 }
1568
1569 void
1570 tclearregion(int x1, int y1, int x2, int y2) {
1571 int x, y, temp;
1572
1573 if(x1 > x2)
1574 temp = x1, x1 = x2, x2 = temp;
1575 if(y1 > y2)
1576 temp = y1, y1 = y2, y2 = temp;
1577
1578 LIMIT(x1, 0, term.col-1);
1579 LIMIT(x2, 0, term.col-1);
1580 LIMIT(y1, 0, term.row-1);
1581 LIMIT(y2, 0, term.row-1);
1582
1583 for(y = y1; y <= y2; y++) {
1584 term.dirty[y] = 1;
1585 for(x = x1; x <= x2; x++) {
1586 if(selected(x, y))
1587 selclear(NULL);
1588 term.line[y][x] = term.c.attr;
1589 memcpy(term.line[y][x].c, " ", 2);
1590 }
1591 }
1592 }
1593
1594 void
1595 tdeletechar(int n) {
1596 int dst, src, size;
1597 Glyph *line;
1598
1599 LIMIT(n, 0, term.col - term.c.x);
1600
1601 dst = term.c.x;
1602 src = term.c.x + n;
1603 size = term.col - src;
1604 line = term.line[term.c.y];
1605
1606 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1607 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1608 }
1609
1610 void
1611 tinsertblank(int n) {
1612 int dst, src, size;
1613 Glyph *line;
1614
1615 LIMIT(n, 0, term.col - term.c.x);
1616
1617 dst = term.c.x + n;
1618 src = term.c.x;
1619 size = term.col - dst;
1620 line = term.line[term.c.y];
1621
1622 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1623 tclearregion(src, term.c.y, dst - 1, term.c.y);
1624 }
1625
1626 void
1627 tinsertblankline(int n) {
1628 if(BETWEEN(term.c.y, term.top, term.bot))
1629 tscrolldown(term.c.y, n);
1630 }
1631
1632 void
1633 tdeleteline(int n) {
1634 if(BETWEEN(term.c.y, term.top, term.bot))
1635 tscrollup(term.c.y, n);
1636 }
1637
1638 int32_t
1639 tdefcolor(int *attr, int *npar, int l) {
1640 int32_t idx = -1;
1641 uint r, g, b;
1642
1643 switch (attr[*npar + 1]) {
1644 case 2: /* direct colour in RGB space */
1645 if (*npar + 4 >= l) {
1646 fprintf(stderr,
1647 "erresc(38): Incorrect number of parameters (%d)\n",
1648 *npar);
1649 break;
1650 }
1651 r = attr[*npar + 2];
1652 g = attr[*npar + 3];
1653 b = attr[*npar + 4];
1654 *npar += 4;
1655 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1656 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1657 r, g, b);
1658 else
1659 idx = TRUECOLOR(r, g, b);
1660 break;
1661 case 5: /* indexed colour */
1662 if (*npar + 2 >= l) {
1663 fprintf(stderr,
1664 "erresc(38): Incorrect number of parameters (%d)\n",
1665 *npar);
1666 break;
1667 }
1668 *npar += 2;
1669 if(!BETWEEN(attr[*npar], 0, 255))
1670 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1671 else
1672 idx = attr[*npar];
1673 break;
1674 case 0: /* implemented defined (only foreground) */
1675 case 1: /* transparent */
1676 case 3: /* direct colour in CMY space */
1677 case 4: /* direct colour in CMYK space */
1678 default:
1679 fprintf(stderr,
1680 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1681 break;
1682 }
1683
1684 return idx;
1685 }
1686
1687 void
1688 tsetattr(int *attr, int l) {
1689 int i;
1690 int32_t idx;
1691
1692 for(i = 0; i < l; i++) {
1693 switch(attr[i]) {
1694 case 0:
1695 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1696 | ATTR_BOLD | ATTR_ITALIC \
1697 | ATTR_BLINK);
1698 term.c.attr.fg = defaultfg;
1699 term.c.attr.bg = defaultbg;
1700 break;
1701 case 1:
1702 term.c.attr.mode |= ATTR_BOLD;
1703 break;
1704 case 3:
1705 term.c.attr.mode |= ATTR_ITALIC;
1706 break;
1707 case 4:
1708 term.c.attr.mode |= ATTR_UNDERLINE;
1709 break;
1710 case 5: /* slow blink */
1711 case 6: /* rapid blink */
1712 term.c.attr.mode |= ATTR_BLINK;
1713 break;
1714 case 7:
1715 term.c.attr.mode |= ATTR_REVERSE;
1716 break;
1717 case 21:
1718 case 22:
1719 term.c.attr.mode &= ~ATTR_BOLD;
1720 break;
1721 case 23:
1722 term.c.attr.mode &= ~ATTR_ITALIC;
1723 break;
1724 case 24:
1725 term.c.attr.mode &= ~ATTR_UNDERLINE;
1726 break;
1727 case 25:
1728 case 26:
1729 term.c.attr.mode &= ~ATTR_BLINK;
1730 break;
1731 case 27:
1732 term.c.attr.mode &= ~ATTR_REVERSE;
1733 break;
1734 case 38:
1735 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1736 term.c.attr.fg = idx;
1737 break;
1738 case 39:
1739 term.c.attr.fg = defaultfg;
1740 break;
1741 case 48:
1742 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1743 term.c.attr.bg = idx;
1744 break;
1745 case 49:
1746 term.c.attr.bg = defaultbg;
1747 break;
1748 default:
1749 if(BETWEEN(attr[i], 30, 37)) {
1750 term.c.attr.fg = attr[i] - 30;
1751 } else if(BETWEEN(attr[i], 40, 47)) {
1752 term.c.attr.bg = attr[i] - 40;
1753 } else if(BETWEEN(attr[i], 90, 97)) {
1754 term.c.attr.fg = attr[i] - 90 + 8;
1755 } else if(BETWEEN(attr[i], 100, 107)) {
1756 term.c.attr.bg = attr[i] - 100 + 8;
1757 } else {
1758 fprintf(stderr,
1759 "erresc(default): gfx attr %d unknown\n",
1760 attr[i]), csidump();
1761 }
1762 break;
1763 }
1764 }
1765 }
1766
1767 void
1768 tsetscroll(int t, int b) {
1769 int temp;
1770
1771 LIMIT(t, 0, term.row-1);
1772 LIMIT(b, 0, term.row-1);
1773 if(t > b) {
1774 temp = t;
1775 t = b;
1776 b = temp;
1777 }
1778 term.top = t;
1779 term.bot = b;
1780 }
1781
1782 void
1783 tsetmode(bool priv, bool set, int *args, int narg) {
1784 int *lim, mode;
1785 bool alt;
1786
1787 for(lim = args + narg; args < lim; ++args) {
1788 if(priv) {
1789 switch(*args) {
1790 case 1: /* DECCKM -- Cursor key */
1791 MODBIT(term.mode, set, MODE_APPCURSOR);
1792 break;
1793 case 5: /* DECSCNM -- Reverse video */
1794 mode = term.mode;
1795 MODBIT(term.mode, set, MODE_REVERSE);
1796 if(mode != term.mode)
1797 redraw(REDRAW_TIMEOUT);
1798 break;
1799 case 6: /* DECOM -- Origin */
1800 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1801 tmoveato(0, 0);
1802 break;
1803 case 7: /* DECAWM -- Auto wrap */
1804 MODBIT(term.mode, set, MODE_WRAP);
1805 break;
1806 case 0: /* Error (IGNORED) */
1807 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1808 case 3: /* DECCOLM -- Column (IGNORED) */
1809 case 4: /* DECSCLM -- Scroll (IGNORED) */
1810 case 8: /* DECARM -- Auto repeat (IGNORED) */
1811 case 18: /* DECPFF -- Printer feed (IGNORED) */
1812 case 19: /* DECPEX -- Printer extent (IGNORED) */
1813 case 42: /* DECNRCM -- National characters (IGNORED) */
1814 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1815 break;
1816 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1817 MODBIT(term.mode, !set, MODE_HIDE);
1818 break;
1819 case 9: /* X10 mouse compatibility mode */
1820 xsetpointermotion(0);
1821 MODBIT(term.mode, 0, MODE_MOUSE);
1822 MODBIT(term.mode, set, MODE_MOUSEX10);
1823 break;
1824 case 1000: /* 1000: report button press */
1825 xsetpointermotion(0);
1826 MODBIT(term.mode, 0, MODE_MOUSE);
1827 MODBIT(term.mode, set, MODE_MOUSEBTN);
1828 break;
1829 case 1002: /* 1002: report motion on button press */
1830 xsetpointermotion(0);
1831 MODBIT(term.mode, 0, MODE_MOUSE);
1832 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1833 break;
1834 case 1003: /* 1003: enable all mouse motions */
1835 xsetpointermotion(set);
1836 MODBIT(term.mode, 0, MODE_MOUSE);
1837 MODBIT(term.mode, set, MODE_MOUSEMANY);
1838 break;
1839 case 1004: /* 1004: send focus events to tty */
1840 MODBIT(term.mode, set, MODE_FOCUS);
1841 break;
1842 case 1006: /* 1006: extended reporting mode */
1843 MODBIT(term.mode, set, MODE_MOUSESGR);
1844 break;
1845 case 1034:
1846 MODBIT(term.mode, set, MODE_8BIT);
1847 break;
1848 case 1049: /* swap screen & set/restore cursor as xterm */
1849 if (!allowaltscreen)
1850 break;
1851 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1852 /* FALLTHRU */
1853 case 47: /* swap screen */
1854 case 1047:
1855 if (!allowaltscreen)
1856 break;
1857 alt = IS_SET(MODE_ALTSCREEN);
1858 if(alt) {
1859 tclearregion(0, 0, term.col-1,
1860 term.row-1);
1861 }
1862 if(set ^ alt) /* set is always 1 or 0 */
1863 tswapscreen();
1864 if(*args != 1049)
1865 break;
1866 /* FALLTRU */
1867 case 1048:
1868 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1869 break;
1870 case 2004: /* 2004: bracketed paste mode */
1871 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1872 break;
1873 /* Not implemented mouse modes. See comments there. */
1874 case 1001: /* mouse highlight mode; can hang the
1875 terminal by design when implemented. */
1876 case 1005: /* UTF-8 mouse mode; will confuse
1877 applications not supporting UTF-8
1878 and luit. */
1879 case 1015: /* urxvt mangled mouse mode; incompatible
1880 and can be mistaken for other control
1881 codes. */
1882 default:
1883 fprintf(stderr,
1884 "erresc: unknown private set/reset mode %d\n",
1885 *args);
1886 break;
1887 }
1888 } else {
1889 switch(*args) {
1890 case 0: /* Error (IGNORED) */
1891 break;
1892 case 2: /* KAM -- keyboard action */
1893 MODBIT(term.mode, set, MODE_KBDLOCK);
1894 break;
1895 case 4: /* IRM -- Insertion-replacement */
1896 MODBIT(term.mode, set, MODE_INSERT);
1897 break;
1898 case 12: /* SRM -- Send/Receive */
1899 MODBIT(term.mode, !set, MODE_ECHO);
1900 break;
1901 case 20: /* LNM -- Linefeed/new line */
1902 MODBIT(term.mode, set, MODE_CRLF);
1903 break;
1904 default:
1905 fprintf(stderr,
1906 "erresc: unknown set/reset mode %d\n",
1907 *args);
1908 break;
1909 }
1910 }
1911 }
1912 }
1913
1914 void
1915 csihandle(void) {
1916 char buf[40];
1917 int len;
1918
1919 switch(csiescseq.mode) {
1920 default:
1921 unknown:
1922 fprintf(stderr, "erresc: unknown csi ");
1923 csidump();
1924 /* die(""); */
1925 break;
1926 case '@': /* ICH -- Insert <n> blank char */
1927 DEFAULT(csiescseq.arg[0], 1);
1928 tinsertblank(csiescseq.arg[0]);
1929 break;
1930 case 'A': /* CUU -- Cursor <n> Up */
1931 DEFAULT(csiescseq.arg[0], 1);
1932 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1933 break;
1934 case 'B': /* CUD -- Cursor <n> Down */
1935 case 'e': /* VPR --Cursor <n> Down */
1936 DEFAULT(csiescseq.arg[0], 1);
1937 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1938 break;
1939 case 'i': /* MC -- Media Copy */
1940 switch(csiescseq.arg[0]) {
1941 case 0:
1942 tdump();
1943 break;
1944 case 1:
1945 tdumpline(term.c.y);
1946 break;
1947 case 2:
1948 tdumpsel();
1949 break;
1950 case 4:
1951 term.mode &= ~MODE_PRINT;
1952 break;
1953 case 5:
1954 term.mode |= MODE_PRINT;
1955 break;
1956 }
1957 break;
1958 case 'c': /* DA -- Device Attributes */
1959 if(csiescseq.arg[0] == 0)
1960 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1961 break;
1962 case 'C': /* CUF -- Cursor <n> Forward */
1963 case 'a': /* HPR -- Cursor <n> Forward */
1964 DEFAULT(csiescseq.arg[0], 1);
1965 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1966 break;
1967 case 'D': /* CUB -- Cursor <n> Backward */
1968 DEFAULT(csiescseq.arg[0], 1);
1969 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1970 break;
1971 case 'E': /* CNL -- Cursor <n> Down and first col */
1972 DEFAULT(csiescseq.arg[0], 1);
1973 tmoveto(0, term.c.y+csiescseq.arg[0]);
1974 break;
1975 case 'F': /* CPL -- Cursor <n> Up and first col */
1976 DEFAULT(csiescseq.arg[0], 1);
1977 tmoveto(0, term.c.y-csiescseq.arg[0]);
1978 break;
1979 case 'g': /* TBC -- Tabulation clear */
1980 switch(csiescseq.arg[0]) {
1981 case 0: /* clear current tab stop */
1982 term.tabs[term.c.x] = 0;
1983 break;
1984 case 3: /* clear all the tabs */
1985 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1986 break;
1987 default:
1988 goto unknown;
1989 }
1990 break;
1991 case 'G': /* CHA -- Move to <col> */
1992 case '`': /* HPA */
1993 DEFAULT(csiescseq.arg[0], 1);
1994 tmoveto(csiescseq.arg[0]-1, term.c.y);
1995 break;
1996 case 'H': /* CUP -- Move to <row> <col> */
1997 case 'f': /* HVP */
1998 DEFAULT(csiescseq.arg[0], 1);
1999 DEFAULT(csiescseq.arg[1], 1);
2000 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2001 break;
2002 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2003 DEFAULT(csiescseq.arg[0], 1);
2004 tputtab(csiescseq.arg[0]);
2005 break;
2006 case 'J': /* ED -- Clear screen */
2007 selclear(NULL);
2008 switch(csiescseq.arg[0]) {
2009 case 0: /* below */
2010 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2011 if(term.c.y < term.row-1) {
2012 tclearregion(0, term.c.y+1, term.col-1,
2013 term.row-1);
2014 }
2015 break;
2016 case 1: /* above */
2017 if(term.c.y > 1)
2018 tclearregion(0, 0, term.col-1, term.c.y-1);
2019 tclearregion(0, term.c.y, term.c.x, term.c.y);
2020 break;
2021 case 2: /* all */
2022 tclearregion(0, 0, term.col-1, term.row-1);
2023 break;
2024 default:
2025 goto unknown;
2026 }
2027 break;
2028 case 'K': /* EL -- Clear line */
2029 switch(csiescseq.arg[0]) {
2030 case 0: /* right */
2031 tclearregion(term.c.x, term.c.y, term.col-1,
2032 term.c.y);
2033 break;
2034 case 1: /* left */
2035 tclearregion(0, term.c.y, term.c.x, term.c.y);
2036 break;
2037 case 2: /* all */
2038 tclearregion(0, term.c.y, term.col-1, term.c.y);
2039 break;
2040 }
2041 break;
2042 case 'S': /* SU -- Scroll <n> line up */
2043 DEFAULT(csiescseq.arg[0], 1);
2044 tscrollup(term.top, csiescseq.arg[0]);
2045 break;
2046 case 'T': /* SD -- Scroll <n> line down */
2047 DEFAULT(csiescseq.arg[0], 1);
2048 tscrolldown(term.top, csiescseq.arg[0]);
2049 break;
2050 case 'L': /* IL -- Insert <n> blank lines */
2051 DEFAULT(csiescseq.arg[0], 1);
2052 tinsertblankline(csiescseq.arg[0]);
2053 break;
2054 case 'l': /* RM -- Reset Mode */
2055 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2056 break;
2057 case 'M': /* DL -- Delete <n> lines */
2058 DEFAULT(csiescseq.arg[0], 1);
2059 tdeleteline(csiescseq.arg[0]);
2060 break;
2061 case 'X': /* ECH -- Erase <n> char */
2062 DEFAULT(csiescseq.arg[0], 1);
2063 tclearregion(term.c.x, term.c.y,
2064 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2065 break;
2066 case 'P': /* DCH -- Delete <n> char */
2067 DEFAULT(csiescseq.arg[0], 1);
2068 tdeletechar(csiescseq.arg[0]);
2069 break;
2070 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2071 DEFAULT(csiescseq.arg[0], 1);
2072 tputtab(-csiescseq.arg[0]);
2073 break;
2074 case 'd': /* VPA -- Move to <row> */
2075 DEFAULT(csiescseq.arg[0], 1);
2076 tmoveato(term.c.x, csiescseq.arg[0]-1);
2077 break;
2078 case 'h': /* SM -- Set terminal mode */
2079 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2080 break;
2081 case 'm': /* SGR -- Terminal attribute (color) */
2082 tsetattr(csiescseq.arg, csiescseq.narg);
2083 break;
2084 case 'n': /* DSR – Device Status Report (cursor position) */
2085 if (csiescseq.arg[0] == 6) {
2086 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2087 term.c.y+1, term.c.x+1);
2088 ttywrite(buf, len);
2089 break;
2090 }
2091 case 'r': /* DECSTBM -- Set Scrolling Region */
2092 if(csiescseq.priv) {
2093 goto unknown;
2094 } else {
2095 DEFAULT(csiescseq.arg[0], 1);
2096 DEFAULT(csiescseq.arg[1], term.row);
2097 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2098 tmoveato(0, 0);
2099 }
2100 break;
2101 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2102 tcursor(CURSOR_SAVE);
2103 break;
2104 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2105 tcursor(CURSOR_LOAD);
2106 break;
2107 }
2108 }
2109
2110 void
2111 csidump(void) {
2112 int i;
2113 uint c;
2114
2115 printf("ESC[");
2116 for(i = 0; i < csiescseq.len; i++) {
2117 c = csiescseq.buf[i] & 0xff;
2118 if(isprint(c)) {
2119 putchar(c);
2120 } else if(c == '\n') {
2121 printf("(\\n)");
2122 } else if(c == '\r') {
2123 printf("(\\r)");
2124 } else if(c == 0x1b) {
2125 printf("(\\e)");
2126 } else {
2127 printf("(%02x)", c);
2128 }
2129 }
2130 putchar('\n');
2131 }
2132
2133 void
2134 csireset(void) {
2135 memset(&csiescseq, 0, sizeof(csiescseq));
2136 }
2137
2138 void
2139 strhandle(void) {
2140 char *p = NULL;
2141 int j, narg, par;
2142
2143 term.esc &= ~(ESC_STR_END|ESC_STR);
2144 strparse();
2145 narg = strescseq.narg;
2146 par = atoi(strescseq.args[0]);
2147
2148 switch(strescseq.type) {
2149 case ']': /* OSC -- Operating System Command */
2150 switch(par) {
2151 case 0:
2152 case 1:
2153 case 2:
2154 if(narg > 1)
2155 xsettitle(strescseq.args[1]);
2156 return;
2157 case 4: /* color set */
2158 if(narg < 3)
2159 break;
2160 p = strescseq.args[2];
2161 /* fall through */
2162 case 104: /* color reset, here p = NULL */
2163 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2164 if (!xsetcolorname(j, p)) {
2165 fprintf(stderr, "erresc: invalid color %s\n", p);
2166 } else {
2167 /*
2168 * TODO if defaultbg color is changed, borders
2169 * are dirty
2170 */
2171 redraw(0);
2172 }
2173 return;
2174 }
2175 break;
2176 case 'k': /* old title set compatibility */
2177 xsettitle(strescseq.args[0]);
2178 return;
2179 case 'P': /* DCS -- Device Control String */
2180 case '_': /* APC -- Application Program Command */
2181 case '^': /* PM -- Privacy Message */
2182 return;
2183 }
2184
2185 fprintf(stderr, "erresc: unknown str ");
2186 strdump();
2187 }
2188
2189 void
2190 strparse(void) {
2191 char *p = strescseq.buf;
2192
2193 strescseq.narg = 0;
2194 strescseq.buf[strescseq.len] = '\0';
2195 while(p && strescseq.narg < STR_ARG_SIZ)
2196 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2197 }
2198
2199 void
2200 strdump(void) {
2201 int i;
2202 uint c;
2203
2204 printf("ESC%c", strescseq.type);
2205 for(i = 0; i < strescseq.len; i++) {
2206 c = strescseq.buf[i] & 0xff;
2207 if(c == '\0') {
2208 return;
2209 } else if(isprint(c)) {
2210 putchar(c);
2211 } else if(c == '\n') {
2212 printf("(\\n)");
2213 } else if(c == '\r') {
2214 printf("(\\r)");
2215 } else if(c == 0x1b) {
2216 printf("(\\e)");
2217 } else {
2218 printf("(%02x)", c);
2219 }
2220 }
2221 printf("ESC\\\n");
2222 }
2223
2224 void
2225 strreset(void) {
2226 memset(&strescseq, 0, sizeof(strescseq));
2227 }
2228
2229 void
2230 tprinter(char *s, size_t len) {
2231 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2232 fprintf(stderr, "Error writing in %s:%s\n",
2233 opt_io, strerror(errno));
2234 close(iofd);
2235 iofd = -1;
2236 }
2237 }
2238
2239 void
2240 toggleprinter(const Arg *arg) {
2241 term.mode ^= MODE_PRINT;
2242 }
2243
2244 void
2245 printscreen(const Arg *arg) {
2246 tdump();
2247 }
2248
2249 void
2250 printsel(const Arg *arg) {
2251 tdumpsel();
2252 }
2253
2254 void
2255 tdumpsel(void) {
2256 char *ptr;
2257
2258 if((ptr = getsel())) {
2259 tprinter(ptr, strlen(ptr));
2260 free(ptr);
2261 }
2262 }
2263
2264 void
2265 tdumpline(int n) {
2266 Glyph *bp, *end;
2267
2268 bp = &term.line[n][0];
2269 end = &bp[term.col-1];
2270 while(end > bp && !strcmp(" ", end->c))
2271 --end;
2272 if(bp != end || strcmp(bp->c, " ")) {
2273 for( ;bp <= end; ++bp)
2274 tprinter(bp->c, strlen(bp->c));
2275 }
2276 tprinter("\n", 1);
2277 }
2278
2279 void
2280 tdump(void) {
2281 int i;
2282
2283 for(i = 0; i < term.row; ++i)
2284 tdumpline(i);
2285 }
2286
2287 void
2288 tputtab(int n) {
2289 uint x = term.c.x;
2290
2291 if(n > 0) {
2292 while(x < term.col && n--)
2293 for(++x; x < term.col && !term.tabs[x]; ++x)
2294 /* nothing */ ;
2295 } else if(n < 0) {
2296 while(x > 0 && n++)
2297 for(--x; x > 0 && !term.tabs[x]; --x)
2298 /* nothing */ ;
2299 }
2300 tmoveto(x, term.c.y);
2301 }
2302
2303 void
2304 techo(char *buf, int len) {
2305 for(; len > 0; buf++, len--) {
2306 char c = *buf;
2307
2308 if(ISCONTROL(c)) { /* control code */
2309 if(c & 0x80) {
2310 c &= 0x7f;
2311 tputc("^", 1);
2312 tputc("[", 1);
2313 } else if(c != '\n' && c != '\r' && c != '\t') {
2314 c ^= '\x40';
2315 tputc("^", 1);
2316 }
2317 tputc(&c, 1);
2318 } else {
2319 break;
2320 }
2321 }
2322 if(len)
2323 tputc(buf, len);
2324 }
2325
2326 void
2327 tdeftran(char ascii) {
2328 char c, (*bp)[2];
2329 static char tbl[][2] = {
2330 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2331 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2332 {'5', CS_FIN}, {'C', CS_FIN},
2333 {0, 0}
2334 };
2335
2336 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2337 /* nothing */;
2338
2339 if (c == 0)
2340 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2341 else
2342 term.trantbl[term.icharset] = (*bp)[1];
2343 }
2344
2345 void
2346 tselcs(void) {
2347 MODBIT(term.c.attr.mode,
2348 term.trantbl[term.charset] == CS_GRAPHIC0,
2349 ATTR_GFX);
2350 }
2351
2352 bool
2353 tcontrolcode(uchar ascii) {
2354 static char question[UTF_SIZ] = "?";
2355
2356 switch(ascii) {
2357 case '\t': /* HT */
2358 tputtab(1);
2359 break;
2360 case '\b': /* BS */
2361 tmoveto(term.c.x-1, term.c.y);
2362 break;
2363 case '\r': /* CR */
2364 tmoveto(0, term.c.y);
2365 break;
2366 case '\f': /* LF */
2367 case '\v': /* VT */
2368 case '\n': /* LF */
2369 /* go to first col if the mode is set */
2370 tnewline(IS_SET(MODE_CRLF));
2371 break;
2372 case '\a': /* BEL */
2373 if(term.esc & ESC_STR_END) {
2374 /* backwards compatibility to xterm */
2375 strhandle();
2376 } else {
2377 if(!(xw.state & WIN_FOCUSED))
2378 xseturgency(1);
2379 if (bellvolume)
2380 XBell(xw.dpy, bellvolume);
2381 }
2382 break;
2383 case '\033': /* ESC */
2384 csireset();
2385 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2386 term.esc |= ESC_START;
2387 return 1;
2388 case '\016': /* SO */
2389 term.charset = 0;
2390 tselcs();
2391 break;
2392 case '\017': /* SI */
2393 term.charset = 1;
2394 tselcs();
2395 break;
2396 case '\032': /* SUB */
2397 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2398 case '\030': /* CAN */
2399 csireset();
2400 break;
2401 case '\005': /* ENQ (IGNORED) */
2402 case '\000': /* NUL (IGNORED) */
2403 case '\021': /* XON (IGNORED) */
2404 case '\023': /* XOFF (IGNORED) */
2405 case 0177: /* DEL (IGNORED) */
2406 case 0x84: /* TODO: IND */
2407 case 0x85: /* TODO: NEL */
2408 case 0x88: /* TODO: HTS */
2409 case 0x8d: /* TODO: RI */
2410 case 0x8e: /* TODO: SS2 */
2411 case 0x8f: /* TODO: SS3 */
2412 case 0x90: /* TODO: DCS */
2413 case 0x98: /* TODO: SOS */
2414 case 0x9a: /* TODO: DECID */
2415 case 0x9b: /* TODO: CSI */
2416 case 0x9c: /* TODO: ST */
2417 case 0x9d: /* TODO: OSC */
2418 case 0x9e: /* TODO: PM */
2419 case 0x9f: /* TODO: APC */
2420 break;
2421 default:
2422 return 0;
2423 }
2424 term.esc &= ~(ESC_STR_END|ESC_STR);
2425 return 1;
2426 }
2427
2428 void
2429 tputc(char *c, int len) {
2430 uchar ascii;
2431 bool control;
2432 long unicodep;
2433 int width;
2434
2435 if(len == 1) {
2436 width = 1;
2437 unicodep = ascii = *c;
2438 } else {
2439 utf8decode(c, &unicodep, UTF_SIZ);
2440 width = wcwidth(unicodep);
2441 control = ISCONTROLC1(unicodep);
2442 ascii = unicodep;
2443 }
2444
2445 if(IS_SET(MODE_PRINT))
2446 tprinter(c, len);
2447 control = ISCONTROL(unicodep);
2448
2449 /*
2450 * STR sequence must be checked before anything else
2451 * because it uses all following characters until it
2452 * receives a ESC, a SUB, a ST or any other C1 control
2453 * character.
2454 */
2455 if(term.esc & ESC_STR) {
2456 if(width == 1 &&
2457 (ascii == '\a' || ascii == 030 ||
2458 ascii == 032 || ascii == 033 ||
2459 ISCONTROLC1(unicodep))) {
2460 term.esc &= ~ESC_STR;
2461 term.esc |= ESC_STR_END;
2462 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2463 memmove(&strescseq.buf[strescseq.len], c, len);
2464 strescseq.len += len;
2465 return;
2466 } else {
2467 /*
2468 * Here is a bug in terminals. If the user never sends
2469 * some code to stop the str or esc command, then st
2470 * will stop responding. But this is better than
2471 * silently failing with unknown characters. At least
2472 * then users will report back.
2473 *
2474 * In the case users ever get fixed, here is the code:
2475 */
2476 /*
2477 * term.esc = 0;
2478 * strhandle();
2479 */
2480 return;
2481 }
2482 }
2483
2484 /*
2485 * Actions of control codes must be performed as soon they arrive
2486 * because they can be embedded inside a control sequence, and
2487 * they must not cause conflicts with sequences.
2488 */
2489 if(control) {
2490 if (tcontrolcode(ascii))
2491 return;
2492 } else if(term.esc & ESC_START) {
2493 if(term.esc & ESC_CSI) {
2494 csiescseq.buf[csiescseq.len++] = ascii;
2495 if(BETWEEN(ascii, 0x40, 0x7E)
2496 || csiescseq.len >= \
2497 sizeof(csiescseq.buf)-1) {
2498 term.esc = 0;
2499 csiparse();
2500 csihandle();
2501 }
2502 return;
2503 } else if(term.esc & ESC_ALTCHARSET) {
2504 tdeftran(ascii);
2505 tselcs();
2506 } else if(term.esc & ESC_TEST) {
2507 if(ascii == '8') { /* DEC screen alignment test. */
2508 char E[UTF_SIZ] = "E";
2509 int x, y;
2510
2511 for(x = 0; x < term.col; ++x) {
2512 for(y = 0; y < term.row; ++y)
2513 tsetchar(E, &term.c.attr, x, y);
2514 }
2515 }
2516 } else {
2517 switch(ascii) {
2518 case '[':
2519 term.esc |= ESC_CSI;
2520 return;
2521 case '#':
2522 term.esc |= ESC_TEST;
2523 return;
2524 case 'P': /* DCS -- Device Control String */
2525 case '_': /* APC -- Application Program Command */
2526 case '^': /* PM -- Privacy Message */
2527 case ']': /* OSC -- Operating System Command */
2528 case 'k': /* old title set compatibility */
2529 strreset();
2530 strescseq.type = ascii;
2531 term.esc |= ESC_STR;
2532 return;
2533 case '(': /* set primary charset G0 */
2534 case ')': /* set secondary charset G1 */
2535 case '*': /* set tertiary charset G2 */
2536 case '+': /* set quaternary charset G3 */
2537 term.icharset = ascii - '(';
2538 term.esc |= ESC_ALTCHARSET;
2539 return;
2540 case 'D': /* IND -- Linefeed */
2541 if(term.c.y == term.bot) {
2542 tscrollup(term.top, 1);
2543 } else {
2544 tmoveto(term.c.x, term.c.y+1);
2545 }
2546 break;
2547 case 'E': /* NEL -- Next line */
2548 tnewline(1); /* always go to first col */
2549 break;
2550 case 'H': /* HTS -- Horizontal tab stop */
2551 term.tabs[term.c.x] = 1;
2552 break;
2553 case 'M': /* RI -- Reverse index */
2554 if(term.c.y == term.top) {
2555 tscrolldown(term.top, 1);
2556 } else {
2557 tmoveto(term.c.x, term.c.y-1);
2558 }
2559 break;
2560 case 'Z': /* DECID -- Identify Terminal */
2561 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2562 break;
2563 case 'c': /* RIS -- Reset to inital state */
2564 treset();
2565 xresettitle();
2566 xloadcols();
2567 break;
2568 case '=': /* DECPAM -- Application keypad */
2569 term.mode |= MODE_APPKEYPAD;
2570 break;
2571 case '>': /* DECPNM -- Normal keypad */
2572 term.mode &= ~MODE_APPKEYPAD;
2573 break;
2574 case '7': /* DECSC -- Save Cursor */
2575 tcursor(CURSOR_SAVE);
2576 break;
2577 case '8': /* DECRC -- Restore Cursor */
2578 tcursor(CURSOR_LOAD);
2579 break;
2580 case '\\': /* ST -- String Terminator */
2581 if(term.esc & ESC_STR_END)
2582 strhandle();
2583 break;
2584 default:
2585 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2586 (uchar) ascii, isprint(ascii)? ascii:'.');
2587 break;
2588 }
2589 }
2590 term.esc = 0;
2591 /*
2592 * All characters which form part of a sequence are not
2593 * printed
2594 */
2595 return;
2596 }
2597 /*
2598 * Display control codes only if we are in graphic mode
2599 */
2600 if(control && !(term.c.attr.mode & ATTR_GFX))
2601 return;
2602 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2603 selclear(NULL);
2604 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2605 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2606 tnewline(1);
2607 }
2608
2609 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2610 memmove(&term.line[term.c.y][term.c.x+1],
2611 &term.line[term.c.y][term.c.x],
2612 (term.col - term.c.x - 1) * sizeof(Glyph));
2613 }
2614
2615 if(term.c.x+width > term.col)
2616 tnewline(1);
2617
2618 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2619
2620 if(width == 2) {
2621 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2622 if(term.c.x+1 < term.col) {
2623 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2624 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2625 }
2626 }
2627 if(term.c.x+width < term.col) {
2628 tmoveto(term.c.x+width, term.c.y);
2629 } else {
2630 term.c.state |= CURSOR_WRAPNEXT;
2631 }
2632 }
2633
2634 int
2635 tresize(int col, int row) {
2636 int i;
2637 int minrow = MIN(row, term.row);
2638 int mincol = MIN(col, term.col);
2639 int slide = term.c.y - row + 1;
2640 bool *bp;
2641 Line *orig;
2642
2643 if(col < 1 || row < 1)
2644 return 0;
2645
2646 /* free unneeded rows */
2647 i = 0;
2648 if(slide > 0) {
2649 /*
2650 * slide screen to keep cursor where we expect it -
2651 * tscrollup would work here, but we can optimize to
2652 * memmove because we're freeing the earlier lines
2653 */
2654 for(/* i = 0 */; i < slide; i++) {
2655 free(term.line[i]);
2656 free(term.alt[i]);
2657 }
2658 memmove(term.line, term.line + slide, row * sizeof(Line));
2659 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2660 }
2661 for(i += row; i < term.row; i++) {
2662 free(term.line[i]);
2663 free(term.alt[i]);
2664 }
2665
2666 /* resize to new height */
2667 term.line = xrealloc(term.line, row * sizeof(Line));
2668 term.alt = xrealloc(term.alt, row * sizeof(Line));
2669 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2670 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2671
2672 /* resize each row to new width, zero-pad if needed */
2673 for(i = 0; i < minrow; i++) {
2674 term.dirty[i] = 1;
2675 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2676 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2677 }
2678
2679 /* allocate any new rows */
2680 for(/* i == minrow */; i < row; i++) {
2681 term.dirty[i] = 1;
2682 term.line[i] = xmalloc(col * sizeof(Glyph));
2683 term.alt[i] = xmalloc(col * sizeof(Glyph));
2684 }
2685 if(col > term.col) {
2686 bp = term.tabs + term.col;
2687
2688 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2689 while(--bp > term.tabs && !*bp)
2690 /* nothing */ ;
2691 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2692 *bp = 1;
2693 }
2694 /* update terminal size */
2695 term.col = col;
2696 term.row = row;
2697 /* reset scrolling region */
2698 tsetscroll(0, row-1);
2699 /* make use of the LIMIT in tmoveto */
2700 tmoveto(term.c.x, term.c.y);
2701 /* Clearing both screens */
2702 orig = term.line;
2703 do {
2704 if(mincol < col && 0 < minrow) {
2705 tclearregion(mincol, 0, col - 1, minrow - 1);
2706 }
2707 if(0 < col && minrow < row) {
2708 tclearregion(0, minrow, col - 1, row - 1);
2709 }
2710 tcursor(CURSOR_SAVE);
2711 tswapscreen();
2712 tcursor(CURSOR_LOAD);
2713 } while(orig != term.line);
2714
2715 return (slide > 0);
2716 }
2717
2718 void
2719 xresize(int col, int row) {
2720 xw.tw = MAX(1, col * xw.cw);
2721 xw.th = MAX(1, row * xw.ch);
2722
2723 XFreePixmap(xw.dpy, xw.buf);
2724 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2725 DefaultDepth(xw.dpy, xw.scr));
2726 XftDrawChange(xw.draw, xw.buf);
2727 xclear(0, 0, xw.w, xw.h);
2728 }
2729
2730 static inline ushort
2731 sixd_to_16bit(int x) {
2732 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2733 }
2734
2735 void
2736 xloadcols(void) {
2737 int i, r, g, b;
2738 XRenderColor color = { .alpha = 0xffff };
2739 static bool loaded;
2740 Colour *cp;
2741
2742 if(loaded) {
2743 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2744 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2745 }
2746
2747 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2748 for(i = 0; i < LEN(colorname); i++) {
2749 if(!colorname[i])
2750 continue;
2751 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2752 die("Could not allocate color '%s'\n", colorname[i]);
2753 }
2754 }
2755
2756 /* load colors [16-255] ; same colors as xterm */
2757 for(i = 16, r = 0; r < 6; r++) {
2758 for(g = 0; g < 6; g++) {
2759 for(b = 0; b < 6; b++) {
2760 color.red = sixd_to_16bit(r);
2761 color.green = sixd_to_16bit(g);
2762 color.blue = sixd_to_16bit(b);
2763 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2764 die("Could not allocate color %d\n", i);
2765 }
2766 i++;
2767 }
2768 }
2769 }
2770
2771 for(r = 0; r < 24; r++, i++) {
2772 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2773 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2774 &dc.col[i])) {
2775 die("Could not allocate color %d\n", i);
2776 }
2777 }
2778 loaded = true;
2779 }
2780
2781 int
2782 xsetcolorname(int x, const char *name) {
2783 XRenderColor color = { .alpha = 0xffff };
2784 Colour colour;
2785 if(!BETWEEN(x, 0, LEN(colorname)))
2786 return -1;
2787 if(!name) {
2788 if(BETWEEN(x, 16, 16 + 215)) {
2789 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2790 color.red = sixd_to_16bit(r);
2791 color.green = sixd_to_16bit(g);
2792 color.blue = sixd_to_16bit(b);
2793 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2794 return 0; /* something went wrong */
2795 dc.col[x] = colour;
2796 return 1;
2797 } else if(BETWEEN(x, 16 + 216, 255)) {
2798 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2799 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2800 return 0; /* something went wrong */
2801 dc.col[x] = colour;
2802 return 1;
2803 } else {
2804 name = colorname[x];
2805 }
2806 }
2807 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2808 return 0;
2809 dc.col[x] = colour;
2810 return 1;
2811 }
2812
2813 void
2814 xtermclear(int col1, int row1, int col2, int row2) {
2815 XftDrawRect(xw.draw,
2816 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2817 borderpx + col1 * xw.cw,
2818 borderpx + row1 * xw.ch,
2819 (col2-col1+1) * xw.cw,
2820 (row2-row1+1) * xw.ch);
2821 }
2822
2823 /*
2824 * Absolute coordinates.
2825 */
2826 void
2827 xclear(int x1, int y1, int x2, int y2) {
2828 XftDrawRect(xw.draw,
2829 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2830 x1, y1, x2-x1, y2-y1);
2831 }
2832
2833 void
2834 xhints(void) {
2835 XClassHint class = {opt_class ? opt_class : termname, termname};
2836 XWMHints wm = {.flags = InputHint, .input = 1};
2837 XSizeHints *sizeh = NULL;
2838
2839 sizeh = XAllocSizeHints();
2840
2841 sizeh->flags = PSize | PResizeInc | PBaseSize;
2842 sizeh->height = xw.h;
2843 sizeh->width = xw.w;
2844 sizeh->height_inc = xw.ch;
2845 sizeh->width_inc = xw.cw;
2846 sizeh->base_height = 2 * borderpx;
2847 sizeh->base_width = 2 * borderpx;
2848 if(xw.isfixed == True) {
2849 sizeh->flags |= PMaxSize | PMinSize;
2850 sizeh->min_width = sizeh->max_width = xw.w;
2851 sizeh->min_height = sizeh->max_height = xw.h;
2852 }
2853 if(xw.gm & (XValue|YValue)) {
2854 sizeh->flags |= USPosition | PWinGravity;
2855 sizeh->x = xw.l;
2856 sizeh->y = xw.t;
2857 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2858 }
2859
2860 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2861 &class);
2862 XFree(sizeh);
2863 }
2864
2865 int
2866 xgeommasktogravity(int mask) {
2867 switch(mask & (XNegative|YNegative)) {
2868 case 0:
2869 return NorthWestGravity;
2870 case XNegative:
2871 return NorthEastGravity;
2872 case YNegative:
2873 return SouthWestGravity;
2874 }
2875 return SouthEastGravity;
2876 }
2877
2878 int
2879 xloadfont(Font *f, FcPattern *pattern) {
2880 FcPattern *match;
2881 FcResult result;
2882
2883 match = FcFontMatch(NULL, pattern, &result);
2884 if(!match)
2885 return 1;
2886
2887 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2888 FcPatternDestroy(match);
2889 return 1;
2890 }
2891
2892 f->set = NULL;
2893 f->pattern = FcPatternDuplicate(pattern);
2894
2895 f->ascent = f->match->ascent;
2896 f->descent = f->match->descent;
2897 f->lbearing = 0;
2898 f->rbearing = f->match->max_advance_width;
2899
2900 f->height = f->ascent + f->descent;
2901 f->width = f->lbearing + f->rbearing;
2902
2903 return 0;
2904 }
2905
2906 void
2907 xloadfonts(char *fontstr, double fontsize) {
2908 FcPattern *pattern;
2909 FcResult r_sz, r_psz;
2910 double fontval;
2911
2912 if(fontstr[0] == '-') {
2913 pattern = XftXlfdParse(fontstr, False, False);
2914 } else {
2915 pattern = FcNameParse((FcChar8 *)fontstr);
2916 }
2917
2918 if(!pattern)
2919 die("st: can't open font %s\n", fontstr);
2920
2921 if(fontsize > 0) {
2922 FcPatternDel(pattern, FC_PIXEL_SIZE);
2923 FcPatternDel(pattern, FC_SIZE);
2924 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2925 usedfontsize = fontsize;
2926 } else {
2927 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2928 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2929 if(r_psz == FcResultMatch) {
2930 usedfontsize = fontval;
2931 } else if(r_sz == FcResultMatch) {
2932 usedfontsize = -1;
2933 } else {
2934 /*
2935 * Default font size is 12, if none given. This is to
2936 * have a known usedfontsize value.
2937 */
2938 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2939 usedfontsize = 12;
2940 }
2941 }
2942
2943 FcConfigSubstitute(0, pattern, FcMatchPattern);
2944 FcDefaultSubstitute(pattern);
2945
2946 if(xloadfont(&dc.font, pattern))
2947 die("st: can't open font %s\n", fontstr);
2948
2949 if(usedfontsize < 0) {
2950 FcPatternGetDouble(dc.font.match->pattern,
2951 FC_PIXEL_SIZE, 0, &fontval);
2952 usedfontsize = fontval;
2953 }
2954
2955 /* Setting character width and height. */
2956 xw.cw = CEIL(dc.font.width * cwscale);
2957 xw.ch = CEIL(dc.font.height * chscale);
2958
2959 FcPatternDel(pattern, FC_SLANT);
2960 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2961 if(xloadfont(&dc.ifont, pattern))
2962 die("st: can't open font %s\n", fontstr);
2963
2964 FcPatternDel(pattern, FC_WEIGHT);
2965 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2966 if(xloadfont(&dc.ibfont, pattern))
2967 die("st: can't open font %s\n", fontstr);
2968
2969 FcPatternDel(pattern, FC_SLANT);
2970 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2971 if(xloadfont(&dc.bfont, pattern))
2972 die("st: can't open font %s\n", fontstr);
2973
2974 FcPatternDestroy(pattern);
2975 }
2976
2977 int
2978 xloadfontset(Font *f) {
2979 FcResult result;
2980
2981 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2982 return 1;
2983 return 0;
2984 }
2985
2986 void
2987 xunloadfont(Font *f) {
2988 XftFontClose(xw.dpy, f->match);
2989 FcPatternDestroy(f->pattern);
2990 if(f->set)
2991 FcFontSetDestroy(f->set);
2992 }
2993
2994 void
2995 xunloadfonts(void) {
2996 int i;
2997
2998 /* Free the loaded fonts in the font cache. */
2999 for(i = 0; i < frclen; i++) {
3000 XftFontClose(xw.dpy, frc[i].font);
3001 }
3002 frclen = 0;
3003
3004 xunloadfont(&dc.font);
3005 xunloadfont(&dc.bfont);
3006 xunloadfont(&dc.ifont);
3007 xunloadfont(&dc.ibfont);
3008 }
3009
3010 void
3011 xzoom(const Arg *arg) {
3012 xunloadfonts();
3013 xloadfonts(usedfont, usedfontsize + arg->i);
3014 cresize(0, 0);
3015 redraw(0);
3016 }
3017
3018 void
3019 xinit(void) {
3020 XGCValues gcvalues;
3021 Cursor cursor;
3022 Window parent;
3023 pid_t thispid = getpid();
3024
3025 if(!(xw.dpy = XOpenDisplay(NULL)))
3026 die("Can't open display\n");
3027 xw.scr = XDefaultScreen(xw.dpy);
3028 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3029
3030 /* font */
3031 if(!FcInit())
3032 die("Could not init fontconfig.\n");
3033
3034 usedfont = (opt_font == NULL)? font : opt_font;
3035 xloadfonts(usedfont, 0);
3036
3037 /* colors */
3038 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3039 xloadcols();
3040
3041 /* adjust fixed window geometry */
3042 xw.w = 2 * borderpx + term.col * xw.cw;
3043 xw.h = 2 * borderpx + term.row * xw.ch;
3044 if(xw.gm & XNegative)
3045 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3046 if(xw.gm & YNegative)
3047 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3048
3049 /* Events */
3050 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3051 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3052 xw.attrs.bit_gravity = NorthWestGravity;
3053 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3054 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3055 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3056 xw.attrs.colormap = xw.cmap;
3057
3058 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3059 XRootWindow(xw.dpy, xw.scr);
3060 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3061 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3062 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3063 | CWEventMask | CWColormap, &xw.attrs);
3064
3065 memset(&gcvalues, 0, sizeof(gcvalues));
3066 gcvalues.graphics_exposures = False;
3067 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3068 &gcvalues);
3069 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3070 DefaultDepth(xw.dpy, xw.scr));
3071 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3072 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3073
3074 /* Xft rendering context */
3075 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3076
3077 /* input methods */
3078 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3079 XSetLocaleModifiers("@im=local");
3080 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3081 XSetLocaleModifiers("@im=");
3082 if((xw.xim = XOpenIM(xw.dpy,
3083 NULL, NULL, NULL)) == NULL) {
3084 die("XOpenIM failed. Could not open input"
3085 " device.\n");
3086 }
3087 }
3088 }
3089 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3090 | XIMStatusNothing, XNClientWindow, xw.win,
3091 XNFocusWindow, xw.win, NULL);
3092 if(xw.xic == NULL)
3093 die("XCreateIC failed. Could not obtain input method.\n");
3094
3095 /* white cursor, black outline */
3096 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3097 XDefineCursor(xw.dpy, xw.win, cursor);
3098 XRecolorCursor(xw.dpy, cursor,
3099 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3100 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3101
3102 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3103 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3104 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3105 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3106
3107 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3108 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3109 PropModeReplace, (uchar *)&thispid, 1);
3110
3111 xresettitle();
3112 XMapWindow(xw.dpy, xw.win);
3113 xhints();
3114 XSync(xw.dpy, False);
3115 }
3116
3117 void
3118 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3119 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3120 width = charlen * xw.cw, xp, i;
3121 int frcflags;
3122 int u8fl, u8fblen, u8cblen, doesexist;
3123 char *u8c, *u8fs;
3124 long unicodep;
3125 Font *font = &dc.font;
3126 FcResult fcres;
3127 FcPattern *fcpattern, *fontpattern;
3128 FcFontSet *fcsets[] = { NULL };
3129 FcCharSet *fccharset;
3130 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3131 XRenderColor colfg, colbg;
3132 XRectangle r;
3133 int oneatatime;
3134
3135 frcflags = FRC_NORMAL;
3136
3137 if(base.mode & ATTR_ITALIC) {
3138 if(base.fg == defaultfg)
3139 base.fg = defaultitalic;
3140 font = &dc.ifont;
3141 frcflags = FRC_ITALIC;
3142 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3143 if(base.fg == defaultfg)
3144 base.fg = defaultitalic;
3145 font = &dc.ibfont;
3146 frcflags = FRC_ITALICBOLD;
3147 } else if(base.mode & ATTR_UNDERLINE) {
3148 if(base.fg == defaultfg)
3149 base.fg = defaultunderline;
3150 }
3151
3152 if(IS_TRUECOL(base.fg)) {
3153 colfg.alpha = 0xffff;
3154 colfg.red = TRUERED(base.fg);
3155 colfg.green = TRUEGREEN(base.fg);
3156 colfg.blue = TRUEBLUE(base.fg);
3157 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3158 fg = &truefg;
3159 } else {
3160 fg = &dc.col[base.fg];
3161 }
3162
3163 if(IS_TRUECOL(base.bg)) {
3164 colbg.alpha = 0xffff;
3165 colbg.green = TRUEGREEN(base.bg);
3166 colbg.red = TRUERED(base.bg);
3167 colbg.blue = TRUEBLUE(base.bg);
3168 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3169 bg = &truebg;
3170 } else {
3171 bg = &dc.col[base.bg];
3172 }
3173
3174 if(base.mode & ATTR_BOLD) {
3175 if(BETWEEN(base.fg, 0, 7)) {
3176 /* basic system colors */
3177 fg = &dc.col[base.fg + 8];
3178 } else if(BETWEEN(base.fg, 16, 195)) {
3179 /* 256 colors */
3180 fg = &dc.col[base.fg + 36];
3181 } else if(BETWEEN(base.fg, 232, 251)) {
3182 /* greyscale */
3183 fg = &dc.col[base.fg + 4];
3184 }
3185 /*
3186 * Those ranges will not be brightened:
3187 * 8 - 15 – bright system colors
3188 * 196 - 231 – highest 256 color cube
3189 * 252 - 255 – brightest colors in greyscale
3190 */
3191 font = &dc.bfont;
3192 frcflags = FRC_BOLD;
3193 }
3194
3195 if(IS_SET(MODE_REVERSE)) {
3196 if(fg == &dc.col[defaultfg]) {
3197 fg = &dc.col[defaultbg];
3198 } else {
3199 colfg.red = ~fg->color.red;
3200 colfg.green = ~fg->color.green;
3201 colfg.blue = ~fg->color.blue;
3202 colfg.alpha = fg->color.alpha;
3203 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3204 &revfg);
3205 fg = &revfg;
3206 }
3207
3208 if(bg == &dc.col[defaultbg]) {
3209 bg = &dc.col[defaultfg];
3210 } else {
3211 colbg.red = ~bg->color.red;
3212 colbg.green = ~bg->color.green;
3213 colbg.blue = ~bg->color.blue;
3214 colbg.alpha = bg->color.alpha;
3215 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3216 &revbg);
3217 bg = &revbg;
3218 }
3219 }
3220
3221 if(base.mode & ATTR_REVERSE) {
3222 temp = fg;
3223 fg = bg;
3224 bg = temp;
3225 }
3226
3227 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3228 fg = bg;
3229
3230 /* Intelligent cleaning up of the borders. */
3231 if(x == 0) {
3232 xclear(0, (y == 0)? 0 : winy, borderpx,
3233 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3234 }
3235 if(x + charlen >= term.col) {
3236 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3237 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3238 }
3239 if(y == 0)
3240 xclear(winx, 0, winx + width, borderpx);
3241 if(y == term.row-1)
3242 xclear(winx, winy + xw.ch, winx + width, xw.h);
3243
3244 /* Clean up the region we want to draw to. */
3245 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3246
3247 /* Set the clip region because Xft is sometimes dirty. */
3248 r.x = 0;
3249 r.y = 0;
3250 r.height = xw.ch;
3251 r.width = width;
3252 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3253
3254 for(xp = winx; bytelen > 0;) {
3255 /*
3256 * Search for the range in the to be printed string of glyphs
3257 * that are in the main font. Then print that range. If
3258 * some glyph is found that is not in the font, do the
3259 * fallback dance.
3260 */
3261 u8fs = s;
3262 u8fblen = 0;
3263 u8fl = 0;
3264 oneatatime = font->width != xw.cw;
3265 for(;;) {
3266 u8c = s;
3267 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3268 s += u8cblen;
3269 bytelen -= u8cblen;
3270
3271 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3272 if(oneatatime || !doesexist || bytelen <= 0) {
3273 if(oneatatime || bytelen <= 0) {
3274 if(doesexist) {
3275 u8fl++;
3276 u8fblen += u8cblen;
3277 }
3278 }
3279
3280 if(u8fl > 0) {
3281 XftDrawStringUtf8(xw.draw, fg,
3282 font->match, xp,
3283 winy + font->ascent,
3284 (FcChar8 *)u8fs,
3285 u8fblen);
3286 xp += xw.cw * u8fl;
3287
3288 }
3289 break;
3290 }
3291
3292 u8fl++;
3293 u8fblen += u8cblen;
3294 }
3295 if(doesexist) {
3296 if(oneatatime)
3297 continue;
3298 break;
3299 }
3300
3301 /* Search the font cache. */
3302 for(i = 0; i < frclen; i++) {
3303 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3304 && frc[i].flags == frcflags) {
3305 break;
3306 }
3307 }
3308
3309 /* Nothing was found. */
3310 if(i >= frclen) {
3311 if(!font->set)
3312 xloadfontset(font);
3313 fcsets[0] = font->set;
3314
3315 /*
3316 * Nothing was found in the cache. Now use
3317 * some dozen of Fontconfig calls to get the
3318 * font for one single character.
3319 *
3320 * Xft and fontconfig are design failures.
3321 */
3322 fcpattern = FcPatternDuplicate(font->pattern);
3323 fccharset = FcCharSetCreate();
3324
3325 FcCharSetAddChar(fccharset, unicodep);
3326 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3327 fccharset);
3328 FcPatternAddBool(fcpattern, FC_SCALABLE,
3329 FcTrue);
3330
3331 FcConfigSubstitute(0, fcpattern,
3332 FcMatchPattern);
3333 FcDefaultSubstitute(fcpattern);
3334
3335 fontpattern = FcFontSetMatch(0, fcsets,
3336 FcTrue, fcpattern, &fcres);
3337
3338 /*
3339 * Overwrite or create the new cache entry.
3340 */
3341 if(frclen >= LEN(frc)) {
3342 frclen = LEN(frc) - 1;
3343 XftFontClose(xw.dpy, frc[frclen].font);
3344 }
3345
3346 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3347 fontpattern);
3348 frc[frclen].flags = frcflags;
3349
3350 i = frclen;
3351 frclen++;
3352
3353 FcPatternDestroy(fcpattern);
3354 FcCharSetDestroy(fccharset);
3355 }
3356
3357 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3358 xp, winy + frc[i].font->ascent,
3359 (FcChar8 *)u8c, u8cblen);
3360
3361 xp += xw.cw * wcwidth(unicodep);
3362 }
3363
3364 /*
3365 * This is how the loop above actually should be. Why does the
3366 * application have to care about font details?
3367 *
3368 * I have to repeat: Xft and Fontconfig are design failures.
3369 */
3370 /*
3371 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3372 winy + font->ascent, (FcChar8 *)s, bytelen);
3373 */
3374
3375 if(base.mode & ATTR_UNDERLINE) {
3376 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3377 width, 1);
3378 }
3379
3380 /* Reset clip to none. */
3381 XftDrawSetClip(xw.draw, 0);
3382 }
3383
3384 void
3385 xdrawcursor(void) {
3386 static int oldx = 0, oldy = 0;
3387 int sl, width, curx;
3388 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3389
3390 LIMIT(oldx, 0, term.col-1);
3391 LIMIT(oldy, 0, term.row-1);
3392
3393 curx = term.c.x;
3394
3395 /* adjust position if in dummy */
3396 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3397 oldx--;
3398 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3399 curx--;
3400
3401 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3402
3403 /* remove the old cursor */
3404 sl = utf8len(term.line[oldy][oldx].c);
3405 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3406 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3407 oldy, width, sl);
3408
3409 /* draw the new one */
3410 if(!(IS_SET(MODE_HIDE))) {
3411 if(xw.state & WIN_FOCUSED) {
3412 if(IS_SET(MODE_REVERSE)) {
3413 g.mode |= ATTR_REVERSE;
3414 g.fg = defaultcs;
3415 g.bg = defaultfg;
3416 }
3417
3418 sl = utf8len(g.c);
3419 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3420 ? 2 : 1;
3421 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3422 } else {
3423 XftDrawRect(xw.draw, &dc.col[defaultcs],
3424 borderpx + curx * xw.cw,
3425 borderpx + term.c.y * xw.ch,
3426 xw.cw - 1, 1);
3427 XftDrawRect(xw.draw, &dc.col[defaultcs],
3428 borderpx + curx * xw.cw,
3429 borderpx + term.c.y * xw.ch,
3430 1, xw.ch - 1);
3431 XftDrawRect(xw.draw, &dc.col[defaultcs],
3432 borderpx + (curx + 1) * xw.cw - 1,
3433 borderpx + term.c.y * xw.ch,
3434 1, xw.ch - 1);
3435 XftDrawRect(xw.draw, &dc.col[defaultcs],
3436 borderpx + curx * xw.cw,
3437 borderpx + (term.c.y + 1) * xw.ch - 1,
3438 xw.cw, 1);
3439 }
3440 oldx = curx, oldy = term.c.y;
3441 }
3442 }
3443
3444
3445 void
3446 xsettitle(char *p) {
3447 XTextProperty prop;
3448
3449 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3450 &prop);
3451 XSetWMName(xw.dpy, xw.win, &prop);
3452 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3453 XFree(prop.value);
3454 }
3455
3456 void
3457 xresettitle(void) {
3458 xsettitle(opt_title ? opt_title : "st");
3459 }
3460
3461 void
3462 redraw(int timeout) {
3463 struct timespec tv = {0, timeout * 1000};
3464
3465 draw();
3466
3467 if(timeout > 0) {
3468 nanosleep(&tv, NULL);
3469 XSync(xw.dpy, False); /* necessary for a good tput flash */
3470 }
3471 }
3472
3473 void
3474 draw(void) {
3475 drawregion(0, 0, term.col, term.row);
3476 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3477 xw.h, 0, 0);
3478 XSetForeground(xw.dpy, dc.gc,
3479 dc.col[IS_SET(MODE_REVERSE)?
3480 defaultfg : defaultbg].pixel);
3481 }
3482
3483 void
3484 drawregion(int x1, int y1, int x2, int y2) {
3485 int ic, ib, x, y, ox, sl;
3486 Glyph base, new;
3487 char buf[DRAW_BUF_SIZ];
3488 bool ena_sel = sel.ob.x != -1;
3489 long unicodep;
3490
3491 if(sel.alt != IS_SET(MODE_ALTSCREEN))
3492 ena_sel = 0;
3493
3494 if(!(xw.state & WIN_VISIBLE))
3495 return;
3496
3497 for(y = y1; y < y2; y++) {
3498 if(!term.dirty[y])
3499 continue;
3500
3501 xtermclear(0, y, term.col, y);
3502 term.dirty[y] = 0;
3503 base = term.line[y][0];
3504 ic = ib = ox = 0;
3505 for(x = x1; x < x2; x++) {
3506 new = term.line[y][x];
3507 if(new.mode == ATTR_WDUMMY)
3508 continue;
3509 if(ena_sel && selected(x, y))
3510 new.mode ^= ATTR_REVERSE;
3511 if(ib > 0 && (ATTRCMP(base, new)
3512 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3513 xdraws(buf, base, ox, y, ic, ib);
3514 ic = ib = 0;
3515 }
3516 if(ib == 0) {
3517 ox = x;
3518 base = new;
3519 }
3520
3521 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3522 memcpy(buf+ib, new.c, sl);
3523 ib += sl;
3524 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3525 }
3526 if(ib > 0)
3527 xdraws(buf, base, ox, y, ic, ib);
3528 }
3529 xdrawcursor();
3530 }
3531
3532 void
3533 expose(XEvent *ev) {
3534 XExposeEvent *e = &ev->xexpose;
3535
3536 if(xw.state & WIN_REDRAW) {
3537 if(!e->count)
3538 xw.state &= ~WIN_REDRAW;
3539 }
3540 redraw(0);
3541 }
3542
3543 void
3544 visibility(XEvent *ev) {
3545 XVisibilityEvent *e = &ev->xvisibility;
3546
3547 if(e->state == VisibilityFullyObscured) {
3548 xw.state &= ~WIN_VISIBLE;
3549 } else if(!(xw.state & WIN_VISIBLE)) {
3550 /* need a full redraw for next Expose, not just a buf copy */
3551 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3552 }
3553 }
3554
3555 void
3556 unmap(XEvent *ev) {
3557 xw.state &= ~WIN_VISIBLE;
3558 }
3559
3560 void
3561 xsetpointermotion(int set) {
3562 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3563 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3564 }
3565
3566 void
3567 xseturgency(int add) {
3568 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3569
3570 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3571 XSetWMHints(xw.dpy, xw.win, h);
3572 XFree(h);
3573 }
3574
3575 void
3576 focus(XEvent *ev) {
3577 XFocusChangeEvent *e = &ev->xfocus;
3578
3579 if(e->mode == NotifyGrab)
3580 return;
3581
3582 if(ev->type == FocusIn) {
3583 XSetICFocus(xw.xic);
3584 xw.state |= WIN_FOCUSED;
3585 xseturgency(0);
3586 if(IS_SET(MODE_FOCUS))
3587 ttywrite("\033[I", 3);
3588 } else {
3589 XUnsetICFocus(xw.xic);
3590 xw.state &= ~WIN_FOCUSED;
3591 if(IS_SET(MODE_FOCUS))
3592 ttywrite("\033[O", 3);
3593 }
3594 }
3595
3596 static inline bool
3597 match(uint mask, uint state) {
3598 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3599 }
3600
3601 void
3602 numlock(const Arg *dummy) {
3603 term.numlock ^= 1;
3604 }
3605
3606 char*
3607 kmap(KeySym k, uint state) {
3608 Key *kp;
3609 int i;
3610
3611 /* Check for mapped keys out of X11 function keys. */
3612 for(i = 0; i < LEN(mappedkeys); i++) {
3613 if(mappedkeys[i] == k)
3614 break;
3615 }
3616 if(i == LEN(mappedkeys)) {
3617 if((k & 0xFFFF) < 0xFD00)
3618 return NULL;
3619 }
3620
3621 for(kp = key; kp < key + LEN(key); kp++) {
3622 if(kp->k != k)
3623 continue;
3624
3625 if(!match(kp->mask, state))
3626 continue;
3627
3628 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3629 continue;
3630 if(term.numlock && kp->appkey == 2)
3631 continue;
3632
3633 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3634 continue;
3635
3636 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3637 continue;
3638
3639 return kp->s;
3640 }
3641
3642 return NULL;
3643 }
3644
3645 void
3646 kpress(XEvent *ev) {
3647 XKeyEvent *e = &ev->xkey;
3648 KeySym ksym;
3649 char buf[32], *customkey;
3650 int len;
3651 long c;
3652 Status status;
3653 Shortcut *bp;
3654
3655 if(IS_SET(MODE_KBDLOCK))
3656 return;
3657
3658 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3659 /* 1. shortcuts */
3660 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3661 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3662 bp->func(&(bp->arg));
3663 return;
3664 }
3665 }
3666
3667 /* 2. custom keys from config.h */
3668 if((customkey = kmap(ksym, e->state))) {
3669 ttysend(customkey, strlen(customkey));
3670 return;
3671 }
3672
3673 /* 3. composed string from input method */
3674 if(len == 0)
3675 return;
3676 if(len == 1 && e->state & Mod1Mask) {
3677 if(IS_SET(MODE_8BIT)) {
3678 if(*buf < 0177) {
3679 c = *buf | 0x80;
3680 len = utf8encode(c, buf, UTF_SIZ);
3681 }
3682 } else {
3683 buf[1] = buf[0];
3684 buf[0] = '\033';
3685 len = 2;
3686 }
3687 }
3688 ttysend(buf, len);
3689 }
3690
3691
3692 void
3693 cmessage(XEvent *e) {
3694 /*
3695 * See xembed specs
3696 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3697 */
3698 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3699 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3700 xw.state |= WIN_FOCUSED;
3701 xseturgency(0);
3702 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3703 xw.state &= ~WIN_FOCUSED;
3704 }
3705 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3706 /* Send SIGHUP to shell */
3707 kill(pid, SIGHUP);
3708 exit(EXIT_SUCCESS);
3709 }
3710 }
3711
3712 void
3713 cresize(int width, int height) {
3714 int col, row;
3715
3716 if(width != 0)
3717 xw.w = width;
3718 if(height != 0)
3719 xw.h = height;
3720
3721 col = (xw.w - 2 * borderpx) / xw.cw;
3722 row = (xw.h - 2 * borderpx) / xw.ch;
3723
3724 tresize(col, row);
3725 xresize(col, row);
3726 ttyresize();
3727 }
3728
3729 void
3730 resize(XEvent *e) {
3731 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3732 return;
3733
3734 cresize(e->xconfigure.width, e->xconfigure.height);
3735 }
3736
3737 void
3738 run(void) {
3739 XEvent ev;
3740 int w = xw.w, h = xw.h;
3741 fd_set rfd;
3742 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3743 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3744
3745 /* Waiting for window mapping */
3746 while(1) {
3747 XNextEvent(xw.dpy, &ev);
3748 if(ev.type == ConfigureNotify) {
3749 w = ev.xconfigure.width;
3750 h = ev.xconfigure.height;
3751 } else if(ev.type == MapNotify) {
3752 break;
3753 }
3754 }
3755
3756 ttynew();
3757 cresize(w, h);
3758
3759 gettimeofday(&last, NULL);
3760 lastblink = last;
3761
3762 for(xev = actionfps;;) {
3763 long deltatime;
3764
3765 FD_ZERO(&rfd);
3766 FD_SET(cmdfd, &rfd);
3767 FD_SET(xfd, &rfd);
3768
3769 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3770 if(errno == EINTR)
3771 continue;
3772 die("select failed: %s\n", strerror(errno));
3773 }
3774 if(FD_ISSET(cmdfd, &rfd)) {
3775 ttyread();
3776 if(blinktimeout) {
3777 blinkset = tattrset(ATTR_BLINK);
3778 if(!blinkset)
3779 MODBIT(term.mode, 0, MODE_BLINK);
3780 }
3781 }
3782
3783 if(FD_ISSET(xfd, &rfd))
3784 xev = actionfps;
3785
3786 gettimeofday(&now, NULL);
3787 drawtimeout.tv_sec = 0;
3788 drawtimeout.tv_usec = (1000/xfps) * 1000;
3789 tv = &drawtimeout;
3790
3791 dodraw = 0;
3792 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3793 tsetdirtattr(ATTR_BLINK);
3794 term.mode ^= MODE_BLINK;
3795 lastblink = now;
3796 dodraw = 1;
3797 }
3798 deltatime = TIMEDIFF(now, last);
3799 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3800 || deltatime < 0) {
3801 dodraw = 1;
3802 last = now;
3803 }
3804
3805 if(dodraw) {
3806 while(XPending(xw.dpy)) {
3807 XNextEvent(xw.dpy, &ev);
3808 if(XFilterEvent(&ev, None))
3809 continue;
3810 if(handler[ev.type])
3811 (handler[ev.type])(&ev);
3812 }
3813
3814 draw();
3815 XFlush(xw.dpy);
3816
3817 if(xev && !FD_ISSET(xfd, &rfd))
3818 xev--;
3819 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3820 if(blinkset) {
3821 if(TIMEDIFF(now, lastblink) \
3822 > blinktimeout) {
3823 drawtimeout.tv_usec = 1;
3824 } else {
3825 drawtimeout.tv_usec = (1000 * \
3826 (blinktimeout - \
3827 TIMEDIFF(now,
3828 lastblink)));
3829 }
3830 } else {
3831 tv = NULL;
3832 }
3833 }
3834 }
3835 }
3836 }
3837
3838 void
3839 usage(void) {
3840 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3841 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3842 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3843 }
3844
3845 int
3846 main(int argc, char *argv[]) {
3847 char *titles;
3848 uint cols = 80, rows = 24;
3849
3850 xw.l = xw.t = 0;
3851 xw.isfixed = False;
3852
3853 ARGBEGIN {
3854 case 'a':
3855 allowaltscreen = false;
3856 break;
3857 case 'c':
3858 opt_class = EARGF(usage());
3859 break;
3860 case 'e':
3861 /* eat all remaining arguments */
3862 if(argc > 1) {
3863 opt_cmd = &argv[1];
3864 if(argv[1] != NULL && opt_title == NULL) {
3865 titles = xstrdup(argv[1]);
3866 opt_title = basename(titles);
3867 }
3868 }
3869 goto run;
3870 case 'f':
3871 opt_font = EARGF(usage());
3872 break;
3873 case 'g':
3874 xw.gm = XParseGeometry(EARGF(usage()),
3875 &xw.l, &xw.t, &cols, &rows);
3876 break;
3877 case 'i':
3878 xw.isfixed = True;
3879 break;
3880 case 'o':
3881 opt_io = EARGF(usage());
3882 break;
3883 case 't':
3884 opt_title = EARGF(usage());
3885 break;
3886 case 'w':
3887 opt_embed = EARGF(usage());
3888 break;
3889 case 'v':
3890 default:
3891 usage();
3892 } ARGEND;
3893
3894 run:
3895 setlocale(LC_CTYPE, "");
3896 XSetLocaleModifiers("");
3897 tnew(cols? cols : 1, rows? rows : 1);
3898 xinit();
3899 selinit();
3900 run();
3901
3902 return 0;
3903 }
3904