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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 void tdectest(char );
398 static int32_t tdefcolor(int *, int *, int);
399 static void tselcs(void);
400 static void tdeftran(char);
401 static inline bool match(uint, uint);
402 static void ttynew(void);
403 static void ttyread(void);
404 static void ttyresize(void);
405 static void ttysend(char *, size_t);
406 static void ttywrite(const char *, size_t);
407
408 static void xdraws(char *, Glyph, int, int, int, int);
409 static void xhints(void);
410 static void xclear(int, int, int, int);
411 static void xdrawcursor(void);
412 static void xinit(void);
413 static void xloadcols(void);
414 static int xsetcolorname(int, const char *);
415 static int xgeommasktogravity(int);
416 static int xloadfont(Font *, FcPattern *);
417 static void xloadfonts(char *, double);
418 static int xloadfontset(Font *);
419 static void xsettitle(char *);
420 static void xresettitle(void);
421 static void xsetpointermotion(int);
422 static void xseturgency(int);
423 static void xsetsel(char *);
424 static void xtermclear(int, int, int, int);
425 static void xunloadfont(Font *);
426 static void xunloadfonts(void);
427 static void xresize(int, int);
428
429 static void expose(XEvent *);
430 static void visibility(XEvent *);
431 static void unmap(XEvent *);
432 static char *kmap(KeySym, uint);
433 static void kpress(XEvent *);
434 static void cmessage(XEvent *);
435 static void cresize(int, int);
436 static void resize(XEvent *);
437 static void focus(XEvent *);
438 static void brelease(XEvent *);
439 static void bpress(XEvent *);
440 static void bmotion(XEvent *);
441 static void selnotify(XEvent *);
442 static void selclear(XEvent *);
443 static void selrequest(XEvent *);
444
445 static void selinit(void);
446 static void selsort(void);
447 static inline bool selected(int, int);
448 static char *getsel(void);
449 static void selcopy(void);
450 static void selscroll(int, int);
451 static void selsnap(int, int *, int *, int);
452 static void getbuttoninfo(XEvent *);
453 static void mousereport(XEvent *);
454
455 static size_t utf8decode(char *, long *, size_t);
456 static long utf8decodebyte(char, size_t *);
457 static size_t utf8encode(long, char *, size_t);
458 static char utf8encodebyte(long, size_t);
459 static size_t utf8len(char *);
460 static size_t utf8validate(long *, size_t);
461
462 static ssize_t xwrite(int, const char *, size_t);
463 static void *xmalloc(size_t);
464 static void *xrealloc(void *, size_t);
465 static char *xstrdup(char *);
466
467 static void usage(void);
468
469 static void (*handler[LASTEvent])(XEvent *) = {
470 [KeyPress] = kpress,
471 [ClientMessage] = cmessage,
472 [ConfigureNotify] = resize,
473 [VisibilityNotify] = visibility,
474 [UnmapNotify] = unmap,
475 [Expose] = expose,
476 [FocusIn] = focus,
477 [FocusOut] = focus,
478 [MotionNotify] = bmotion,
479 [ButtonPress] = bpress,
480 [ButtonRelease] = brelease,
481 [SelectionClear] = selclear,
482 [SelectionNotify] = selnotify,
483 [SelectionRequest] = selrequest,
484 };
485
486 /* Globals */
487 static DC dc;
488 static XWindow xw;
489 static Term term;
490 static CSIEscape csiescseq;
491 static STREscape strescseq;
492 static int cmdfd;
493 static pid_t pid;
494 static Selection sel;
495 static int iofd = STDOUT_FILENO;
496 static char **opt_cmd = NULL;
497 static char *opt_io = NULL;
498 static char *opt_title = NULL;
499 static char *opt_embed = NULL;
500 static char *opt_class = NULL;
501 static char *opt_font = NULL;
502 static int oldbutton = 3; /* button event on startup: 3 = release */
503
504 static char *usedfont = NULL;
505 static double usedfontsize = 0;
506
507 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
508 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
509 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
510 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
511
512 /* Font Ring Cache */
513 enum {
514 FRC_NORMAL,
515 FRC_ITALIC,
516 FRC_BOLD,
517 FRC_ITALICBOLD
518 };
519
520 typedef struct {
521 XftFont *font;
522 int flags;
523 } Fontcache;
524
525 /* Fontcache is an array now. A new font will be appended to the array. */
526 static Fontcache frc[16];
527 static int frclen = 0;
528
529 ssize_t
530 xwrite(int fd, const char *s, size_t len) {
531 size_t aux = len;
532
533 while(len > 0) {
534 ssize_t r = write(fd, s, len);
535 if(r < 0)
536 return r;
537 len -= r;
538 s += r;
539 }
540 return aux;
541 }
542
543 void *
544 xmalloc(size_t len) {
545 void *p = malloc(len);
546
547 if(!p)
548 die("Out of memory\n");
549
550 return p;
551 }
552
553 void *
554 xrealloc(void *p, size_t len) {
555 if((p = realloc(p, len)) == NULL)
556 die("Out of memory\n");
557
558 return p;
559 }
560
561 char *
562 xstrdup(char *s) {
563 if((s = strdup(s)) == NULL)
564 die("Out of memory\n");
565
566 return s;
567 }
568
569 size_t
570 utf8decode(char *c, long *u, size_t clen) {
571 size_t i, j, len, type;
572 long udecoded;
573
574 *u = UTF_INVALID;
575 if(!clen)
576 return 0;
577 udecoded = utf8decodebyte(c[0], &len);
578 if(!BETWEEN(len, 1, UTF_SIZ))
579 return 1;
580 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
581 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
582 if(type != 0)
583 return j;
584 }
585 if(j < len)
586 return 0;
587 *u = udecoded;
588 utf8validate(u, len);
589 return len;
590 }
591
592 long
593 utf8decodebyte(char c, size_t *i) {
594 for(*i = 0; *i < LEN(utfmask); ++(*i))
595 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
596 return (uchar)c & ~utfmask[*i];
597 return 0;
598 }
599
600 size_t
601 utf8encode(long u, char *c, size_t clen) {
602 size_t len, i;
603
604 len = utf8validate(&u, 0);
605 if(clen < len)
606 return 0;
607 for(i = len - 1; i != 0; --i) {
608 c[i] = utf8encodebyte(u, 0);
609 u >>= 6;
610 }
611 c[0] = utf8encodebyte(u, len);
612 return len;
613 }
614
615 char
616 utf8encodebyte(long u, size_t i) {
617 return utfbyte[i] | (u & ~utfmask[i]);
618 }
619
620 size_t
621 utf8len(char *c) {
622 return utf8decode(c, &(long){0}, UTF_SIZ);
623 }
624
625 size_t
626 utf8validate(long *u, size_t i) {
627 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
628 *u = UTF_INVALID;
629 for(i = 1; *u > utfmax[i]; ++i)
630 ;
631 return i;
632 }
633
634 static void
635 selinit(void) {
636 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
637 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
638 sel.mode = 0;
639 sel.ob.x = -1;
640 sel.clip = NULL;
641 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
642 if(sel.xtarget == None)
643 sel.xtarget = XA_STRING;
644 }
645
646 static int
647 x2col(int x) {
648 x -= borderpx;
649 x /= xw.cw;
650
651 return LIMIT(x, 0, term.col-1);
652 }
653
654 static int
655 y2row(int y) {
656 y -= borderpx;
657 y /= xw.ch;
658
659 return LIMIT(y, 0, term.row-1);
660 }
661
662 static void
663 selsort(void) {
664 if(sel.ob.y == sel.oe.y) {
665 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
666 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
667 } else {
668 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
669 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
670 }
671 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
672 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
673 }
674
675 static inline bool
676 selected(int x, int y) {
677 if(sel.ne.y == y && sel.nb.y == y)
678 return BETWEEN(x, sel.nb.x, sel.ne.x);
679
680 if(sel.type == SEL_RECTANGULAR) {
681 return ((sel.nb.y <= y && y <= sel.ne.y)
682 && (sel.nb.x <= x && x <= sel.ne.x));
683 }
684
685 return ((sel.nb.y < y && y < sel.ne.y)
686 || (y == sel.ne.y && x <= sel.ne.x))
687 || (y == sel.nb.y && x >= sel.nb.x
688 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
689 }
690
691 void
692 selsnap(int mode, int *x, int *y, int direction) {
693 int i;
694
695 switch(mode) {
696 case SNAP_WORD:
697 /*
698 * Snap around if the word wraps around at the end or
699 * beginning of a line.
700 */
701 for(;;) {
702 if(direction < 0 && *x <= 0) {
703 if(*y > 0 && term.line[*y - 1][term.col-1].mode
704 & ATTR_WRAP) {
705 *y -= 1;
706 *x = term.col-1;
707 } else {
708 break;
709 }
710 }
711 if(direction > 0 && *x >= term.col-1) {
712 if(*y < term.row-1 && term.line[*y][*x].mode
713 & ATTR_WRAP) {
714 *y += 1;
715 *x = 0;
716 } else {
717 break;
718 }
719 }
720
721 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
722 *x += direction;
723 continue;
724 }
725
726 if(strchr(worddelimiters,
727 term.line[*y][*x+direction].c[0])) {
728 break;
729 }
730
731 *x += direction;
732 }
733 break;
734 case SNAP_LINE:
735 /*
736 * Snap around if the the previous line or the current one
737 * has set ATTR_WRAP at its end. Then the whole next or
738 * previous line will be selected.
739 */
740 *x = (direction < 0) ? 0 : term.col - 1;
741 if(direction < 0 && *y > 0) {
742 for(; *y > 0; *y += direction) {
743 if(!(term.line[*y-1][term.col-1].mode
744 & ATTR_WRAP)) {
745 break;
746 }
747 }
748 } else if(direction > 0 && *y < term.row-1) {
749 for(; *y < term.row; *y += direction) {
750 if(!(term.line[*y][term.col-1].mode
751 & ATTR_WRAP)) {
752 break;
753 }
754 }
755 }
756 break;
757 default:
758 /*
759 * Select the whole line when the end of line is reached.
760 */
761 if(direction > 0) {
762 i = term.col;
763 while(--i > 0 && term.line[*y][i].c[0] == ' ')
764 /* nothing */;
765 if(i > 0 && i < *x)
766 *x = term.col - 1;
767 }
768 break;
769 }
770 }
771
772 void
773 getbuttoninfo(XEvent *e) {
774 int type;
775 uint state = e->xbutton.state &~Button1Mask;
776
777 sel.alt = IS_SET(MODE_ALTSCREEN);
778
779 sel.oe.x = x2col(e->xbutton.x);
780 sel.oe.y = y2row(e->xbutton.y);
781
782 if(sel.ob.y < sel.oe.y
783 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
784 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
785 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
786 } else {
787 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
788 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
789 }
790 selsort();
791
792 sel.type = SEL_REGULAR;
793 for(type = 1; type < LEN(selmasks); ++type) {
794 if(match(selmasks[type], state)) {
795 sel.type = type;
796 break;
797 }
798 }
799 }
800
801 void
802 mousereport(XEvent *e) {
803 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
804 button = e->xbutton.button, state = e->xbutton.state,
805 len;
806 char buf[40];
807 static int ox, oy;
808
809 /* from urxvt */
810 if(e->xbutton.type == MotionNotify) {
811 if(x == ox && y == oy)
812 return;
813 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
814 return;
815 /* MOUSE_MOTION: no reporting if no button is pressed */
816 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
817 return;
818
819 button = oldbutton + 32;
820 ox = x;
821 oy = y;
822 } else {
823 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
824 button = 3;
825 } else {
826 button -= Button1;
827 if(button >= 3)
828 button += 64 - 3;
829 }
830 if(e->xbutton.type == ButtonPress) {
831 oldbutton = button;
832 ox = x;
833 oy = y;
834 } else if(e->xbutton.type == ButtonRelease) {
835 oldbutton = 3;
836 /* MODE_MOUSEX10: no button release reporting */
837 if(IS_SET(MODE_MOUSEX10))
838 return;
839 }
840 }
841
842 if(!IS_SET(MODE_MOUSEX10)) {
843 button += (state & ShiftMask ? 4 : 0)
844 + (state & Mod4Mask ? 8 : 0)
845 + (state & ControlMask ? 16 : 0);
846 }
847
848 len = 0;
849 if(IS_SET(MODE_MOUSESGR)) {
850 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
851 button, x+1, y+1,
852 e->xbutton.type == ButtonRelease ? 'm' : 'M');
853 } else if(x < 223 && y < 223) {
854 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
855 32+button, 32+x+1, 32+y+1);
856 } else {
857 return;
858 }
859
860 ttywrite(buf, len);
861 }
862
863 void
864 bpress(XEvent *e) {
865 struct timeval now;
866 Mousekey *mk;
867
868 if(IS_SET(MODE_MOUSE)) {
869 mousereport(e);
870 return;
871 }
872
873 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
874 if(e->xbutton.button == mk->b
875 && match(mk->mask, e->xbutton.state)) {
876 ttysend(mk->s, strlen(mk->s));
877 return;
878 }
879 }
880
881 if(e->xbutton.button == Button1) {
882 gettimeofday(&now, NULL);
883
884 /* Clear previous selection, logically and visually. */
885 selclear(NULL);
886 sel.mode = 1;
887 sel.type = SEL_REGULAR;
888 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
889 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
890
891 /*
892 * If the user clicks below predefined timeouts specific
893 * snapping behaviour is exposed.
894 */
895 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
896 sel.snap = SNAP_LINE;
897 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
898 sel.snap = SNAP_WORD;
899 } else {
900 sel.snap = 0;
901 }
902 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
903 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
904 selsort();
905
906 /*
907 * Draw selection, unless it's regular and we don't want to
908 * make clicks visible
909 */
910 if(sel.snap != 0) {
911 sel.mode++;
912 tsetdirt(sel.nb.y, sel.ne.y);
913 }
914 sel.tclick2 = sel.tclick1;
915 sel.tclick1 = now;
916 }
917 }
918
919 char *
920 getsel(void) {
921 char *str, *ptr;
922 int x, y, bufsize, size, i, ex;
923 Glyph *gp, *last;
924
925 if(sel.ob.x == -1)
926 return NULL;
927
928 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
929 ptr = str = xmalloc(bufsize);
930
931 /* append every set & selected glyph to the selection */
932 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
933 gp = &term.line[y][0];
934 last = &gp[term.col-1];
935
936 while(last >= gp && !(selected(last - gp, y) &&
937 strcmp(last->c, " ") != 0)) {
938 --last;
939 }
940
941 for(x = 0; gp <= last; x++, ++gp) {
942 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
943 continue;
944
945 size = utf8len(gp->c);
946 memcpy(ptr, gp->c, size);
947 ptr += size;
948 }
949
950 /*
951 * Copy and pasting of line endings is inconsistent
952 * in the inconsistent terminal and GUI world.
953 * The best solution seems like to produce '\n' when
954 * something is copied from st and convert '\n' to
955 * '\r', when something to be pasted is received by
956 * st.
957 * FIXME: Fix the computer world.
958 */
959 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
960 *ptr++ = '\n';
961
962 /*
963 * If the last selected line expands in the selection
964 * after the visible text '\n' is appended.
965 */
966 if(y == sel.ne.y) {
967 i = term.col;
968 while(--i > 0 && term.line[y][i].c[0] == ' ')
969 /* nothing */;
970 ex = sel.ne.x;
971 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
972 ex = sel.nb.x;
973 if(i < ex)
974 *ptr++ = '\n';
975 }
976 }
977 *ptr = 0;
978 return str;
979 }
980
981 void
982 selcopy(void) {
983 xsetsel(getsel());
984 }
985
986 void
987 selnotify(XEvent *e) {
988 ulong nitems, ofs, rem;
989 int format;
990 uchar *data, *last, *repl;
991 Atom type;
992
993 ofs = 0;
994 do {
995 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
996 False, AnyPropertyType, &type, &format,
997 &nitems, &rem, &data)) {
998 fprintf(stderr, "Clipboard allocation failed\n");
999 return;
1000 }
1001
1002 /*
1003 * As seen in getsel:
1004 * Line endings are inconsistent in the terminal and GUI world
1005 * copy and pasting. When receiving some selection data,
1006 * replace all '\n' with '\r'.
1007 * FIXME: Fix the computer world.
1008 */
1009 repl = data;
1010 last = data + nitems * format / 8;
1011 while((repl = memchr(repl, '\n', last - repl))) {
1012 *repl++ = '\r';
1013 }
1014
1015 if(IS_SET(MODE_BRCKTPASTE))
1016 ttywrite("\033[200~", 6);
1017 ttysend((char *)data, nitems * format / 8);
1018 if(IS_SET(MODE_BRCKTPASTE))
1019 ttywrite("\033[201~", 6);
1020 XFree(data);
1021 /* number of 32-bit chunks returned */
1022 ofs += nitems * format / 32;
1023 } while(rem > 0);
1024 }
1025
1026 void
1027 selpaste(const Arg *dummy) {
1028 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1029 xw.win, CurrentTime);
1030 }
1031
1032 void
1033 clippaste(const Arg *dummy) {
1034 Atom clipboard;
1035
1036 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1037 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1038 xw.win, CurrentTime);
1039 }
1040
1041 void
1042 selclear(XEvent *e) {
1043 if(sel.ob.x == -1)
1044 return;
1045 sel.ob.x = -1;
1046 tsetdirt(sel.nb.y, sel.ne.y);
1047 }
1048
1049 void
1050 selrequest(XEvent *e) {
1051 XSelectionRequestEvent *xsre;
1052 XSelectionEvent xev;
1053 Atom xa_targets, string;
1054
1055 xsre = (XSelectionRequestEvent *) e;
1056 xev.type = SelectionNotify;
1057 xev.requestor = xsre->requestor;
1058 xev.selection = xsre->selection;
1059 xev.target = xsre->target;
1060 xev.time = xsre->time;
1061 /* reject */
1062 xev.property = None;
1063
1064 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1065 if(xsre->target == xa_targets) {
1066 /* respond with the supported type */
1067 string = sel.xtarget;
1068 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1069 XA_ATOM, 32, PropModeReplace,
1070 (uchar *) &string, 1);
1071 xev.property = xsre->property;
1072 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1073 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1074 xsre->target, 8, PropModeReplace,
1075 (uchar *) sel.clip, strlen(sel.clip));
1076 xev.property = xsre->property;
1077 }
1078
1079 /* all done, send a notification to the listener */
1080 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1081 fprintf(stderr, "Error sending SelectionNotify event\n");
1082 }
1083
1084 void
1085 xsetsel(char *str) {
1086 /* register the selection for both the clipboard and the primary */
1087 Atom clipboard;
1088
1089 free(sel.clip);
1090 sel.clip = str;
1091
1092 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1093
1094 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1095 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1096 }
1097
1098 void
1099 brelease(XEvent *e) {
1100 if(IS_SET(MODE_MOUSE)) {
1101 mousereport(e);
1102 return;
1103 }
1104
1105 if(e->xbutton.button == Button2) {
1106 selpaste(NULL);
1107 } else if(e->xbutton.button == Button1) {
1108 if(sel.mode < 2) {
1109 selclear(NULL);
1110 } else {
1111 getbuttoninfo(e);
1112 selcopy();
1113 }
1114 sel.mode = 0;
1115 tsetdirt(sel.nb.y, sel.ne.y);
1116 }
1117 }
1118
1119 void
1120 bmotion(XEvent *e) {
1121 int oldey, oldex, oldsby, oldsey;
1122
1123 if(IS_SET(MODE_MOUSE)) {
1124 mousereport(e);
1125 return;
1126 }
1127
1128 if(!sel.mode)
1129 return;
1130
1131 sel.mode++;
1132 oldey = sel.oe.y;
1133 oldex = sel.oe.x;
1134 oldsby = sel.nb.y;
1135 oldsey = sel.ne.y;
1136 getbuttoninfo(e);
1137
1138 if(oldey != sel.oe.y || oldex != sel.oe.x)
1139 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1140 }
1141
1142 void
1143 die(const char *errstr, ...) {
1144 va_list ap;
1145
1146 va_start(ap, errstr);
1147 vfprintf(stderr, errstr, ap);
1148 va_end(ap);
1149 exit(EXIT_FAILURE);
1150 }
1151
1152 void
1153 execsh(void) {
1154 char **args;
1155 char *envshell = getenv("SHELL");
1156 const struct passwd *pass = getpwuid(getuid());
1157 char buf[sizeof(long) * 8 + 1];
1158
1159 unsetenv("COLUMNS");
1160 unsetenv("LINES");
1161 unsetenv("TERMCAP");
1162
1163 if(pass) {
1164 setenv("LOGNAME", pass->pw_name, 1);
1165 setenv("USER", pass->pw_name, 1);
1166 setenv("SHELL", pass->pw_shell, 0);
1167 setenv("HOME", pass->pw_dir, 0);
1168 }
1169
1170 snprintf(buf, sizeof(buf), "%lu", xw.win);
1171 setenv("WINDOWID", buf, 1);
1172
1173 signal(SIGCHLD, SIG_DFL);
1174 signal(SIGHUP, SIG_DFL);
1175 signal(SIGINT, SIG_DFL);
1176 signal(SIGQUIT, SIG_DFL);
1177 signal(SIGTERM, SIG_DFL);
1178 signal(SIGALRM, SIG_DFL);
1179
1180 DEFAULT(envshell, shell);
1181 setenv("TERM", termname, 1);
1182 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1183 execvp(args[0], args);
1184 exit(EXIT_FAILURE);
1185 }
1186
1187 void
1188 sigchld(int a) {
1189 int stat = 0;
1190
1191 if(waitpid(pid, &stat, 0) < 0)
1192 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1193
1194 if(WIFEXITED(stat)) {
1195 exit(WEXITSTATUS(stat));
1196 } else {
1197 exit(EXIT_FAILURE);
1198 }
1199 }
1200
1201 void
1202 ttynew(void) {
1203 int m, s;
1204 struct winsize w = {term.row, term.col, 0, 0};
1205
1206 /* seems to work fine on linux, openbsd and freebsd */
1207 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1208 die("openpty failed: %s\n", strerror(errno));
1209
1210 switch(pid = fork()) {
1211 case -1:
1212 die("fork failed\n");
1213 break;
1214 case 0:
1215 setsid(); /* create a new process group */
1216 dup2(s, STDIN_FILENO);
1217 dup2(s, STDOUT_FILENO);
1218 dup2(s, STDERR_FILENO);
1219 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1220 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1221 close(s);
1222 close(m);
1223 execsh();
1224 break;
1225 default:
1226 close(s);
1227 cmdfd = m;
1228 signal(SIGCHLD, sigchld);
1229 if(opt_io) {
1230 term.mode |= MODE_PRINT;
1231 iofd = (!strcmp(opt_io, "-")) ?
1232 STDOUT_FILENO :
1233 open(opt_io, O_WRONLY | O_CREAT, 0666);
1234 if(iofd < 0) {
1235 fprintf(stderr, "Error opening %s:%s\n",
1236 opt_io, strerror(errno));
1237 }
1238 }
1239 break;
1240 }
1241 }
1242
1243 void
1244 ttyread(void) {
1245 static char buf[BUFSIZ];
1246 static int buflen = 0;
1247 char *ptr;
1248 char s[UTF_SIZ];
1249 int charsize; /* size of utf8 char in bytes */
1250 long unicodep;
1251 int ret;
1252
1253 /* append read bytes to unprocessed bytes */
1254 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1255 die("Couldn't read from shell: %s\n", strerror(errno));
1256
1257 /* process every complete utf8 char */
1258 buflen += ret;
1259 ptr = buf;
1260 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1261 utf8encode(unicodep, s, UTF_SIZ);
1262 tputc(s, charsize);
1263 ptr += charsize;
1264 buflen -= charsize;
1265 }
1266
1267 /* keep any uncomplete utf8 char for the next call */
1268 memmove(buf, ptr, buflen);
1269 }
1270
1271 void
1272 ttywrite(const char *s, size_t n) {
1273 if(xwrite(cmdfd, s, n) == -1)
1274 die("write error on tty: %s\n", strerror(errno));
1275 }
1276
1277 void
1278 ttysend(char *s, size_t n) {
1279 ttywrite(s, n);
1280 if(IS_SET(MODE_ECHO))
1281 techo(s, n);
1282 }
1283
1284 void
1285 ttyresize(void) {
1286 struct winsize w;
1287
1288 w.ws_row = term.row;
1289 w.ws_col = term.col;
1290 w.ws_xpixel = xw.tw;
1291 w.ws_ypixel = xw.th;
1292 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1293 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1294 }
1295
1296 int
1297 tattrset(int attr) {
1298 int i, j;
1299
1300 for(i = 0; i < term.row-1; i++) {
1301 for(j = 0; j < term.col-1; j++) {
1302 if(term.line[i][j].mode & attr)
1303 return 1;
1304 }
1305 }
1306
1307 return 0;
1308 }
1309
1310 void
1311 tsetdirt(int top, int bot) {
1312 int i;
1313
1314 LIMIT(top, 0, term.row-1);
1315 LIMIT(bot, 0, term.row-1);
1316
1317 for(i = top; i <= bot; i++)
1318 term.dirty[i] = 1;
1319 }
1320
1321 void
1322 tsetdirtattr(int attr) {
1323 int i, j;
1324
1325 for(i = 0; i < term.row-1; i++) {
1326 for(j = 0; j < term.col-1; j++) {
1327 if(term.line[i][j].mode & attr) {
1328 tsetdirt(i, i);
1329 break;
1330 }
1331 }
1332 }
1333 }
1334
1335 void
1336 tfulldirt(void) {
1337 tsetdirt(0, term.row-1);
1338 }
1339
1340 void
1341 tcursor(int mode) {
1342 static TCursor c[2];
1343 bool alt = IS_SET(MODE_ALTSCREEN);
1344
1345 if(mode == CURSOR_SAVE) {
1346 c[alt] = term.c;
1347 } else if(mode == CURSOR_LOAD) {
1348 term.c = c[alt];
1349 tmoveto(c[alt].x, c[alt].y);
1350 }
1351 }
1352
1353 void
1354 treset(void) {
1355 uint i;
1356
1357 term.c = (TCursor){{
1358 .mode = ATTR_NULL,
1359 .fg = defaultfg,
1360 .bg = defaultbg
1361 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1362
1363 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1364 for(i = tabspaces; i < term.col; i += tabspaces)
1365 term.tabs[i] = 1;
1366 term.top = 0;
1367 term.bot = term.row - 1;
1368 term.mode = MODE_WRAP;
1369 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1370 term.charset = 0;
1371
1372 tclearregion(0, 0, term.col-1, term.row-1);
1373 tmoveto(0, 0);
1374 tcursor(CURSOR_SAVE);
1375 }
1376
1377 void
1378 tnew(int col, int row) {
1379 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1380 tresize(col, row);
1381 term.numlock = 1;
1382
1383 treset();
1384 }
1385
1386 void
1387 tswapscreen(void) {
1388 Line *tmp = term.line;
1389
1390 term.line = term.alt;
1391 term.alt = tmp;
1392 term.mode ^= MODE_ALTSCREEN;
1393 tfulldirt();
1394 }
1395
1396 void
1397 tscrolldown(int orig, int n) {
1398 int i;
1399 Line temp;
1400
1401 LIMIT(n, 0, term.bot-orig+1);
1402
1403 tsetdirt(orig, term.bot-n);
1404 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1405
1406 for(i = term.bot; i >= orig+n; i--) {
1407 temp = term.line[i];
1408 term.line[i] = term.line[i-n];
1409 term.line[i-n] = temp;
1410 }
1411
1412 selscroll(orig, n);
1413 }
1414
1415 void
1416 tscrollup(int orig, int n) {
1417 int i;
1418 Line temp;
1419
1420 LIMIT(n, 0, term.bot-orig+1);
1421
1422 tclearregion(0, orig, term.col-1, orig+n-1);
1423 tsetdirt(orig+n, term.bot);
1424
1425 for(i = orig; i <= term.bot-n; i++) {
1426 temp = term.line[i];
1427 term.line[i] = term.line[i+n];
1428 term.line[i+n] = temp;
1429 }
1430
1431 selscroll(orig, -n);
1432 }
1433
1434 void
1435 selscroll(int orig, int n) {
1436 if(sel.ob.x == -1)
1437 return;
1438
1439 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1440 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1441 selclear(NULL);
1442 return;
1443 }
1444 if(sel.type == SEL_RECTANGULAR) {
1445 if(sel.ob.y < term.top)
1446 sel.ob.y = term.top;
1447 if(sel.oe.y > term.bot)
1448 sel.oe.y = term.bot;
1449 } else {
1450 if(sel.ob.y < term.top) {
1451 sel.ob.y = term.top;
1452 sel.ob.x = 0;
1453 }
1454 if(sel.oe.y > term.bot) {
1455 sel.oe.y = term.bot;
1456 sel.oe.x = term.col;
1457 }
1458 }
1459 selsort();
1460 }
1461 }
1462
1463 void
1464 tnewline(int first_col) {
1465 int y = term.c.y;
1466
1467 if(y == term.bot) {
1468 tscrollup(term.top, 1);
1469 } else {
1470 y++;
1471 }
1472 tmoveto(first_col ? 0 : term.c.x, y);
1473 }
1474
1475 void
1476 csiparse(void) {
1477 char *p = csiescseq.buf, *np;
1478 long int v;
1479
1480 csiescseq.narg = 0;
1481 if(*p == '?') {
1482 csiescseq.priv = 1;
1483 p++;
1484 }
1485
1486 csiescseq.buf[csiescseq.len] = '\0';
1487 while(p < csiescseq.buf+csiescseq.len) {
1488 np = NULL;
1489 v = strtol(p, &np, 10);
1490 if(np == p)
1491 v = 0;
1492 if(v == LONG_MAX || v == LONG_MIN)
1493 v = -1;
1494 csiescseq.arg[csiescseq.narg++] = v;
1495 p = np;
1496 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1497 break;
1498 p++;
1499 }
1500 csiescseq.mode = *p;
1501 }
1502
1503 /* for absolute user moves, when decom is set */
1504 void
1505 tmoveato(int x, int y) {
1506 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1507 }
1508
1509 void
1510 tmoveto(int x, int y) {
1511 int miny, maxy;
1512
1513 if(term.c.state & CURSOR_ORIGIN) {
1514 miny = term.top;
1515 maxy = term.bot;
1516 } else {
1517 miny = 0;
1518 maxy = term.row - 1;
1519 }
1520 LIMIT(x, 0, term.col-1);
1521 LIMIT(y, miny, maxy);
1522 term.c.state &= ~CURSOR_WRAPNEXT;
1523 term.c.x = x;
1524 term.c.y = y;
1525 }
1526
1527 void
1528 tsetchar(char *c, Glyph *attr, int x, int y) {
1529 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1530 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1531 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1532 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1533 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1534 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1535 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1536 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1537 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1538 };
1539
1540 /*
1541 * The table is proudly stolen from rxvt.
1542 */
1543 if(attr->mode & ATTR_GFX) {
1544 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1545 c = vt100_0[c[0] - 0x41];
1546 }
1547 }
1548
1549 if(term.line[y][x].mode & ATTR_WIDE) {
1550 if(x+1 < term.col) {
1551 term.line[y][x+1].c[0] = ' ';
1552 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1553 }
1554 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1555 term.line[y][x-1].c[0] = ' ';
1556 term.line[y][x-1].mode &= ~ATTR_WIDE;
1557 }
1558
1559 term.dirty[y] = 1;
1560 term.line[y][x] = *attr;
1561 memcpy(term.line[y][x].c, c, UTF_SIZ);
1562 }
1563
1564 void
1565 tclearregion(int x1, int y1, int x2, int y2) {
1566 int x, y, temp;
1567
1568 if(x1 > x2)
1569 temp = x1, x1 = x2, x2 = temp;
1570 if(y1 > y2)
1571 temp = y1, y1 = y2, y2 = temp;
1572
1573 LIMIT(x1, 0, term.col-1);
1574 LIMIT(x2, 0, term.col-1);
1575 LIMIT(y1, 0, term.row-1);
1576 LIMIT(y2, 0, term.row-1);
1577
1578 for(y = y1; y <= y2; y++) {
1579 term.dirty[y] = 1;
1580 for(x = x1; x <= x2; x++) {
1581 if(selected(x, y))
1582 selclear(NULL);
1583 term.line[y][x] = term.c.attr;
1584 memcpy(term.line[y][x].c, " ", 2);
1585 }
1586 }
1587 }
1588
1589 void
1590 tdeletechar(int n) {
1591 int dst, src, size;
1592 Glyph *line;
1593
1594 LIMIT(n, 0, term.col - term.c.x);
1595
1596 dst = term.c.x;
1597 src = term.c.x + n;
1598 size = term.col - src;
1599 line = term.line[term.c.y];
1600
1601 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1602 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1603 }
1604
1605 void
1606 tinsertblank(int n) {
1607 int dst, src, size;
1608 Glyph *line;
1609
1610 LIMIT(n, 0, term.col - term.c.x);
1611
1612 dst = term.c.x + n;
1613 src = term.c.x;
1614 size = term.col - dst;
1615 line = term.line[term.c.y];
1616
1617 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1618 tclearregion(src, term.c.y, dst - 1, term.c.y);
1619 }
1620
1621 void
1622 tinsertblankline(int n) {
1623 if(BETWEEN(term.c.y, term.top, term.bot))
1624 tscrolldown(term.c.y, n);
1625 }
1626
1627 void
1628 tdeleteline(int n) {
1629 if(BETWEEN(term.c.y, term.top, term.bot))
1630 tscrollup(term.c.y, n);
1631 }
1632
1633 int32_t
1634 tdefcolor(int *attr, int *npar, int l) {
1635 int32_t idx = -1;
1636 uint r, g, b;
1637
1638 switch (attr[*npar + 1]) {
1639 case 2: /* direct colour in RGB space */
1640 if (*npar + 4 >= l) {
1641 fprintf(stderr,
1642 "erresc(38): Incorrect number of parameters (%d)\n",
1643 *npar);
1644 break;
1645 }
1646 r = attr[*npar + 2];
1647 g = attr[*npar + 3];
1648 b = attr[*npar + 4];
1649 *npar += 4;
1650 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1651 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1652 r, g, b);
1653 else
1654 idx = TRUECOLOR(r, g, b);
1655 break;
1656 case 5: /* indexed colour */
1657 if (*npar + 2 >= l) {
1658 fprintf(stderr,
1659 "erresc(38): Incorrect number of parameters (%d)\n",
1660 *npar);
1661 break;
1662 }
1663 *npar += 2;
1664 if(!BETWEEN(attr[*npar], 0, 255))
1665 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1666 else
1667 idx = attr[*npar];
1668 break;
1669 case 0: /* implemented defined (only foreground) */
1670 case 1: /* transparent */
1671 case 3: /* direct colour in CMY space */
1672 case 4: /* direct colour in CMYK space */
1673 default:
1674 fprintf(stderr,
1675 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1676 break;
1677 }
1678
1679 return idx;
1680 }
1681
1682 void
1683 tsetattr(int *attr, int l) {
1684 int i;
1685 int32_t idx;
1686
1687 for(i = 0; i < l; i++) {
1688 switch(attr[i]) {
1689 case 0:
1690 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1691 | ATTR_BOLD | ATTR_ITALIC \
1692 | ATTR_BLINK);
1693 term.c.attr.fg = defaultfg;
1694 term.c.attr.bg = defaultbg;
1695 break;
1696 case 1:
1697 term.c.attr.mode |= ATTR_BOLD;
1698 break;
1699 case 3:
1700 term.c.attr.mode |= ATTR_ITALIC;
1701 break;
1702 case 4:
1703 term.c.attr.mode |= ATTR_UNDERLINE;
1704 break;
1705 case 5: /* slow blink */
1706 case 6: /* rapid blink */
1707 term.c.attr.mode |= ATTR_BLINK;
1708 break;
1709 case 7:
1710 term.c.attr.mode |= ATTR_REVERSE;
1711 break;
1712 case 21:
1713 case 22:
1714 term.c.attr.mode &= ~ATTR_BOLD;
1715 break;
1716 case 23:
1717 term.c.attr.mode &= ~ATTR_ITALIC;
1718 break;
1719 case 24:
1720 term.c.attr.mode &= ~ATTR_UNDERLINE;
1721 break;
1722 case 25:
1723 case 26:
1724 term.c.attr.mode &= ~ATTR_BLINK;
1725 break;
1726 case 27:
1727 term.c.attr.mode &= ~ATTR_REVERSE;
1728 break;
1729 case 38:
1730 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1731 term.c.attr.fg = idx;
1732 break;
1733 case 39:
1734 term.c.attr.fg = defaultfg;
1735 break;
1736 case 48:
1737 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1738 term.c.attr.bg = idx;
1739 break;
1740 case 49:
1741 term.c.attr.bg = defaultbg;
1742 break;
1743 default:
1744 if(BETWEEN(attr[i], 30, 37)) {
1745 term.c.attr.fg = attr[i] - 30;
1746 } else if(BETWEEN(attr[i], 40, 47)) {
1747 term.c.attr.bg = attr[i] - 40;
1748 } else if(BETWEEN(attr[i], 90, 97)) {
1749 term.c.attr.fg = attr[i] - 90 + 8;
1750 } else if(BETWEEN(attr[i], 100, 107)) {
1751 term.c.attr.bg = attr[i] - 100 + 8;
1752 } else {
1753 fprintf(stderr,
1754 "erresc(default): gfx attr %d unknown\n",
1755 attr[i]), csidump();
1756 }
1757 break;
1758 }
1759 }
1760 }
1761
1762 void
1763 tsetscroll(int t, int b) {
1764 int temp;
1765
1766 LIMIT(t, 0, term.row-1);
1767 LIMIT(b, 0, term.row-1);
1768 if(t > b) {
1769 temp = t;
1770 t = b;
1771 b = temp;
1772 }
1773 term.top = t;
1774 term.bot = b;
1775 }
1776
1777 void
1778 tsetmode(bool priv, bool set, int *args, int narg) {
1779 int *lim, mode;
1780 bool alt;
1781
1782 for(lim = args + narg; args < lim; ++args) {
1783 if(priv) {
1784 switch(*args) {
1785 case 1: /* DECCKM -- Cursor key */
1786 MODBIT(term.mode, set, MODE_APPCURSOR);
1787 break;
1788 case 5: /* DECSCNM -- Reverse video */
1789 mode = term.mode;
1790 MODBIT(term.mode, set, MODE_REVERSE);
1791 if(mode != term.mode)
1792 redraw(REDRAW_TIMEOUT);
1793 break;
1794 case 6: /* DECOM -- Origin */
1795 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1796 tmoveato(0, 0);
1797 break;
1798 case 7: /* DECAWM -- Auto wrap */
1799 MODBIT(term.mode, set, MODE_WRAP);
1800 break;
1801 case 0: /* Error (IGNORED) */
1802 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1803 case 3: /* DECCOLM -- Column (IGNORED) */
1804 case 4: /* DECSCLM -- Scroll (IGNORED) */
1805 case 8: /* DECARM -- Auto repeat (IGNORED) */
1806 case 18: /* DECPFF -- Printer feed (IGNORED) */
1807 case 19: /* DECPEX -- Printer extent (IGNORED) */
1808 case 42: /* DECNRCM -- National characters (IGNORED) */
1809 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1810 break;
1811 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1812 MODBIT(term.mode, !set, MODE_HIDE);
1813 break;
1814 case 9: /* X10 mouse compatibility mode */
1815 xsetpointermotion(0);
1816 MODBIT(term.mode, 0, MODE_MOUSE);
1817 MODBIT(term.mode, set, MODE_MOUSEX10);
1818 break;
1819 case 1000: /* 1000: report button press */
1820 xsetpointermotion(0);
1821 MODBIT(term.mode, 0, MODE_MOUSE);
1822 MODBIT(term.mode, set, MODE_MOUSEBTN);
1823 break;
1824 case 1002: /* 1002: report motion on button press */
1825 xsetpointermotion(0);
1826 MODBIT(term.mode, 0, MODE_MOUSE);
1827 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1828 break;
1829 case 1003: /* 1003: enable all mouse motions */
1830 xsetpointermotion(set);
1831 MODBIT(term.mode, 0, MODE_MOUSE);
1832 MODBIT(term.mode, set, MODE_MOUSEMANY);
1833 break;
1834 case 1004: /* 1004: send focus events to tty */
1835 MODBIT(term.mode, set, MODE_FOCUS);
1836 break;
1837 case 1006: /* 1006: extended reporting mode */
1838 MODBIT(term.mode, set, MODE_MOUSESGR);
1839 break;
1840 case 1034:
1841 MODBIT(term.mode, set, MODE_8BIT);
1842 break;
1843 case 1049: /* swap screen & set/restore cursor as xterm */
1844 if (!allowaltscreen)
1845 break;
1846 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1847 /* FALLTHRU */
1848 case 47: /* swap screen */
1849 case 1047:
1850 if (!allowaltscreen)
1851 break;
1852 alt = IS_SET(MODE_ALTSCREEN);
1853 if(alt) {
1854 tclearregion(0, 0, term.col-1,
1855 term.row-1);
1856 }
1857 if(set ^ alt) /* set is always 1 or 0 */
1858 tswapscreen();
1859 if(*args != 1049)
1860 break;
1861 /* FALLTRU */
1862 case 1048:
1863 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1864 break;
1865 case 2004: /* 2004: bracketed paste mode */
1866 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1867 break;
1868 /* Not implemented mouse modes. See comments there. */
1869 case 1001: /* mouse highlight mode; can hang the
1870 terminal by design when implemented. */
1871 case 1005: /* UTF-8 mouse mode; will confuse
1872 applications not supporting UTF-8
1873 and luit. */
1874 case 1015: /* urxvt mangled mouse mode; incompatible
1875 and can be mistaken for other control
1876 codes. */
1877 default:
1878 fprintf(stderr,
1879 "erresc: unknown private set/reset mode %d\n",
1880 *args);
1881 break;
1882 }
1883 } else {
1884 switch(*args) {
1885 case 0: /* Error (IGNORED) */
1886 break;
1887 case 2: /* KAM -- keyboard action */
1888 MODBIT(term.mode, set, MODE_KBDLOCK);
1889 break;
1890 case 4: /* IRM -- Insertion-replacement */
1891 MODBIT(term.mode, set, MODE_INSERT);
1892 break;
1893 case 12: /* SRM -- Send/Receive */
1894 MODBIT(term.mode, !set, MODE_ECHO);
1895 break;
1896 case 20: /* LNM -- Linefeed/new line */
1897 MODBIT(term.mode, set, MODE_CRLF);
1898 break;
1899 default:
1900 fprintf(stderr,
1901 "erresc: unknown set/reset mode %d\n",
1902 *args);
1903 break;
1904 }
1905 }
1906 }
1907 }
1908
1909 void
1910 csihandle(void) {
1911 char buf[40];
1912 int len;
1913
1914 switch(csiescseq.mode) {
1915 default:
1916 unknown:
1917 fprintf(stderr, "erresc: unknown csi ");
1918 csidump();
1919 /* die(""); */
1920 break;
1921 case '@': /* ICH -- Insert <n> blank char */
1922 DEFAULT(csiescseq.arg[0], 1);
1923 tinsertblank(csiescseq.arg[0]);
1924 break;
1925 case 'A': /* CUU -- Cursor <n> Up */
1926 DEFAULT(csiescseq.arg[0], 1);
1927 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1928 break;
1929 case 'B': /* CUD -- Cursor <n> Down */
1930 case 'e': /* VPR --Cursor <n> Down */
1931 DEFAULT(csiescseq.arg[0], 1);
1932 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1933 break;
1934 case 'i': /* MC -- Media Copy */
1935 switch(csiescseq.arg[0]) {
1936 case 0:
1937 tdump();
1938 break;
1939 case 1:
1940 tdumpline(term.c.y);
1941 break;
1942 case 2:
1943 tdumpsel();
1944 break;
1945 case 4:
1946 term.mode &= ~MODE_PRINT;
1947 break;
1948 case 5:
1949 term.mode |= MODE_PRINT;
1950 break;
1951 }
1952 break;
1953 case 'c': /* DA -- Device Attributes */
1954 if(csiescseq.arg[0] == 0)
1955 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1956 break;
1957 case 'C': /* CUF -- Cursor <n> Forward */
1958 case 'a': /* HPR -- Cursor <n> Forward */
1959 DEFAULT(csiescseq.arg[0], 1);
1960 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1961 break;
1962 case 'D': /* CUB -- Cursor <n> Backward */
1963 DEFAULT(csiescseq.arg[0], 1);
1964 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1965 break;
1966 case 'E': /* CNL -- Cursor <n> Down and first col */
1967 DEFAULT(csiescseq.arg[0], 1);
1968 tmoveto(0, term.c.y+csiescseq.arg[0]);
1969 break;
1970 case 'F': /* CPL -- Cursor <n> Up and first col */
1971 DEFAULT(csiescseq.arg[0], 1);
1972 tmoveto(0, term.c.y-csiescseq.arg[0]);
1973 break;
1974 case 'g': /* TBC -- Tabulation clear */
1975 switch(csiescseq.arg[0]) {
1976 case 0: /* clear current tab stop */
1977 term.tabs[term.c.x] = 0;
1978 break;
1979 case 3: /* clear all the tabs */
1980 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1981 break;
1982 default:
1983 goto unknown;
1984 }
1985 break;
1986 case 'G': /* CHA -- Move to <col> */
1987 case '`': /* HPA */
1988 DEFAULT(csiescseq.arg[0], 1);
1989 tmoveto(csiescseq.arg[0]-1, term.c.y);
1990 break;
1991 case 'H': /* CUP -- Move to <row> <col> */
1992 case 'f': /* HVP */
1993 DEFAULT(csiescseq.arg[0], 1);
1994 DEFAULT(csiescseq.arg[1], 1);
1995 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1996 break;
1997 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1998 DEFAULT(csiescseq.arg[0], 1);
1999 tputtab(csiescseq.arg[0]);
2000 break;
2001 case 'J': /* ED -- Clear screen */
2002 selclear(NULL);
2003 switch(csiescseq.arg[0]) {
2004 case 0: /* below */
2005 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2006 if(term.c.y < term.row-1) {
2007 tclearregion(0, term.c.y+1, term.col-1,
2008 term.row-1);
2009 }
2010 break;
2011 case 1: /* above */
2012 if(term.c.y > 1)
2013 tclearregion(0, 0, term.col-1, term.c.y-1);
2014 tclearregion(0, term.c.y, term.c.x, term.c.y);
2015 break;
2016 case 2: /* all */
2017 tclearregion(0, 0, term.col-1, term.row-1);
2018 break;
2019 default:
2020 goto unknown;
2021 }
2022 break;
2023 case 'K': /* EL -- Clear line */
2024 switch(csiescseq.arg[0]) {
2025 case 0: /* right */
2026 tclearregion(term.c.x, term.c.y, term.col-1,
2027 term.c.y);
2028 break;
2029 case 1: /* left */
2030 tclearregion(0, term.c.y, term.c.x, term.c.y);
2031 break;
2032 case 2: /* all */
2033 tclearregion(0, term.c.y, term.col-1, term.c.y);
2034 break;
2035 }
2036 break;
2037 case 'S': /* SU -- Scroll <n> line up */
2038 DEFAULT(csiescseq.arg[0], 1);
2039 tscrollup(term.top, csiescseq.arg[0]);
2040 break;
2041 case 'T': /* SD -- Scroll <n> line down */
2042 DEFAULT(csiescseq.arg[0], 1);
2043 tscrolldown(term.top, csiescseq.arg[0]);
2044 break;
2045 case 'L': /* IL -- Insert <n> blank lines */
2046 DEFAULT(csiescseq.arg[0], 1);
2047 tinsertblankline(csiescseq.arg[0]);
2048 break;
2049 case 'l': /* RM -- Reset Mode */
2050 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2051 break;
2052 case 'M': /* DL -- Delete <n> lines */
2053 DEFAULT(csiescseq.arg[0], 1);
2054 tdeleteline(csiescseq.arg[0]);
2055 break;
2056 case 'X': /* ECH -- Erase <n> char */
2057 DEFAULT(csiescseq.arg[0], 1);
2058 tclearregion(term.c.x, term.c.y,
2059 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2060 break;
2061 case 'P': /* DCH -- Delete <n> char */
2062 DEFAULT(csiescseq.arg[0], 1);
2063 tdeletechar(csiescseq.arg[0]);
2064 break;
2065 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2066 DEFAULT(csiescseq.arg[0], 1);
2067 tputtab(-csiescseq.arg[0]);
2068 break;
2069 case 'd': /* VPA -- Move to <row> */
2070 DEFAULT(csiescseq.arg[0], 1);
2071 tmoveato(term.c.x, csiescseq.arg[0]-1);
2072 break;
2073 case 'h': /* SM -- Set terminal mode */
2074 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2075 break;
2076 case 'm': /* SGR -- Terminal attribute (color) */
2077 tsetattr(csiescseq.arg, csiescseq.narg);
2078 break;
2079 case 'n': /* DSR – Device Status Report (cursor position) */
2080 if (csiescseq.arg[0] == 6) {
2081 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2082 term.c.y+1, term.c.x+1);
2083 ttywrite(buf, len);
2084 }
2085 break;
2086 case 'r': /* DECSTBM -- Set Scrolling Region */
2087 if(csiescseq.priv) {
2088 goto unknown;
2089 } else {
2090 DEFAULT(csiescseq.arg[0], 1);
2091 DEFAULT(csiescseq.arg[1], term.row);
2092 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2093 tmoveato(0, 0);
2094 }
2095 break;
2096 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2097 tcursor(CURSOR_SAVE);
2098 break;
2099 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2100 tcursor(CURSOR_LOAD);
2101 break;
2102 }
2103 }
2104
2105 void
2106 csidump(void) {
2107 int i;
2108 uint c;
2109
2110 printf("ESC[");
2111 for(i = 0; i < csiescseq.len; i++) {
2112 c = csiescseq.buf[i] & 0xff;
2113 if(isprint(c)) {
2114 putchar(c);
2115 } else if(c == '\n') {
2116 printf("(\\n)");
2117 } else if(c == '\r') {
2118 printf("(\\r)");
2119 } else if(c == 0x1b) {
2120 printf("(\\e)");
2121 } else {
2122 printf("(%02x)", c);
2123 }
2124 }
2125 putchar('\n');
2126 }
2127
2128 void
2129 csireset(void) {
2130 memset(&csiescseq, 0, sizeof(csiescseq));
2131 }
2132
2133 void
2134 strhandle(void) {
2135 char *p = NULL;
2136 int j, narg, par;
2137
2138 term.esc &= ~(ESC_STR_END|ESC_STR);
2139 strparse();
2140 narg = strescseq.narg;
2141 par = atoi(strescseq.args[0]);
2142
2143 switch(strescseq.type) {
2144 case ']': /* OSC -- Operating System Command */
2145 switch(par) {
2146 case 0:
2147 case 1:
2148 case 2:
2149 if(narg > 1)
2150 xsettitle(strescseq.args[1]);
2151 return;
2152 case 4: /* color set */
2153 if(narg < 3)
2154 break;
2155 p = strescseq.args[2];
2156 /* fall through */
2157 case 104: /* color reset, here p = NULL */
2158 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2159 if (!xsetcolorname(j, p)) {
2160 fprintf(stderr, "erresc: invalid color %s\n", p);
2161 } else {
2162 /*
2163 * TODO if defaultbg color is changed, borders
2164 * are dirty
2165 */
2166 redraw(0);
2167 }
2168 return;
2169 }
2170 break;
2171 case 'k': /* old title set compatibility */
2172 xsettitle(strescseq.args[0]);
2173 return;
2174 case 'P': /* DCS -- Device Control String */
2175 case '_': /* APC -- Application Program Command */
2176 case '^': /* PM -- Privacy Message */
2177 return;
2178 }
2179
2180 fprintf(stderr, "erresc: unknown str ");
2181 strdump();
2182 }
2183
2184 void
2185 strparse(void) {
2186 char *p = strescseq.buf;
2187
2188 strescseq.narg = 0;
2189 strescseq.buf[strescseq.len] = '\0';
2190 while(p && strescseq.narg < STR_ARG_SIZ)
2191 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2192 }
2193
2194 void
2195 strdump(void) {
2196 int i;
2197 uint c;
2198
2199 printf("ESC%c", strescseq.type);
2200 for(i = 0; i < strescseq.len; i++) {
2201 c = strescseq.buf[i] & 0xff;
2202 if(c == '\0') {
2203 return;
2204 } else if(isprint(c)) {
2205 putchar(c);
2206 } else if(c == '\n') {
2207 printf("(\\n)");
2208 } else if(c == '\r') {
2209 printf("(\\r)");
2210 } else if(c == 0x1b) {
2211 printf("(\\e)");
2212 } else {
2213 printf("(%02x)", c);
2214 }
2215 }
2216 printf("ESC\\\n");
2217 }
2218
2219 void
2220 strreset(void) {
2221 memset(&strescseq, 0, sizeof(strescseq));
2222 }
2223
2224 void
2225 tprinter(char *s, size_t len) {
2226 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2227 fprintf(stderr, "Error writing in %s:%s\n",
2228 opt_io, strerror(errno));
2229 close(iofd);
2230 iofd = -1;
2231 }
2232 }
2233
2234 void
2235 toggleprinter(const Arg *arg) {
2236 term.mode ^= MODE_PRINT;
2237 }
2238
2239 void
2240 printscreen(const Arg *arg) {
2241 tdump();
2242 }
2243
2244 void
2245 printsel(const Arg *arg) {
2246 tdumpsel();
2247 }
2248
2249 void
2250 tdumpsel(void) {
2251 char *ptr;
2252
2253 if((ptr = getsel())) {
2254 tprinter(ptr, strlen(ptr));
2255 free(ptr);
2256 }
2257 }
2258
2259 void
2260 tdumpline(int n) {
2261 Glyph *bp, *end;
2262
2263 bp = &term.line[n][0];
2264 end = &bp[term.col-1];
2265 while(end > bp && !strcmp(" ", end->c))
2266 --end;
2267 if(bp != end || strcmp(bp->c, " ")) {
2268 for( ;bp <= end; ++bp)
2269 tprinter(bp->c, strlen(bp->c));
2270 }
2271 tprinter("\n", 1);
2272 }
2273
2274 void
2275 tdump(void) {
2276 int i;
2277
2278 for(i = 0; i < term.row; ++i)
2279 tdumpline(i);
2280 }
2281
2282 void
2283 tputtab(int n) {
2284 uint x = term.c.x;
2285
2286 if(n > 0) {
2287 while(x < term.col && n--)
2288 for(++x; x < term.col && !term.tabs[x]; ++x)
2289 /* nothing */ ;
2290 } else if(n < 0) {
2291 while(x > 0 && n++)
2292 for(--x; x > 0 && !term.tabs[x]; --x)
2293 /* nothing */ ;
2294 }
2295 tmoveto(x, term.c.y);
2296 }
2297
2298 void
2299 techo(char *buf, int len) {
2300 for(; len > 0; buf++, len--) {
2301 char c = *buf;
2302
2303 if(ISCONTROL(c)) { /* control code */
2304 if(c & 0x80) {
2305 c &= 0x7f;
2306 tputc("^", 1);
2307 tputc("[", 1);
2308 } else if(c != '\n' && c != '\r' && c != '\t') {
2309 c ^= '\x40';
2310 tputc("^", 1);
2311 }
2312 tputc(&c, 1);
2313 } else {
2314 break;
2315 }
2316 }
2317 if(len)
2318 tputc(buf, len);
2319 }
2320
2321 void
2322 tdeftran(char ascii) {
2323 char c, (*bp)[2];
2324 static char tbl[][2] = {
2325 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2326 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2327 {'5', CS_FIN}, {'C', CS_FIN},
2328 {0, 0}
2329 };
2330
2331 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2332 /* nothing */;
2333
2334 if (c == 0)
2335 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2336 else
2337 term.trantbl[term.icharset] = (*bp)[1];
2338 }
2339
2340 void
2341 tselcs(void) {
2342 MODBIT(term.c.attr.mode,
2343 term.trantbl[term.charset] == CS_GRAPHIC0,
2344 ATTR_GFX);
2345 }
2346
2347 bool
2348 tcontrolcode(uchar ascii) {
2349 static char question[UTF_SIZ] = "?";
2350
2351 switch(ascii) {
2352 case '\t': /* HT */
2353 tputtab(1);
2354 break;
2355 case '\b': /* BS */
2356 tmoveto(term.c.x-1, term.c.y);
2357 break;
2358 case '\r': /* CR */
2359 tmoveto(0, term.c.y);
2360 break;
2361 case '\f': /* LF */
2362 case '\v': /* VT */
2363 case '\n': /* LF */
2364 /* go to first col if the mode is set */
2365 tnewline(IS_SET(MODE_CRLF));
2366 break;
2367 case '\a': /* BEL */
2368 if(term.esc & ESC_STR_END) {
2369 /* backwards compatibility to xterm */
2370 strhandle();
2371 } else {
2372 if(!(xw.state & WIN_FOCUSED))
2373 xseturgency(1);
2374 if (bellvolume)
2375 XBell(xw.dpy, bellvolume);
2376 }
2377 break;
2378 case '\033': /* ESC */
2379 csireset();
2380 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2381 term.esc |= ESC_START;
2382 return 1;
2383 case '\016': /* SO */
2384 term.charset = 0;
2385 tselcs();
2386 break;
2387 case '\017': /* SI */
2388 term.charset = 1;
2389 tselcs();
2390 break;
2391 case '\032': /* SUB */
2392 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2393 case '\030': /* CAN */
2394 csireset();
2395 break;
2396 case '\005': /* ENQ (IGNORED) */
2397 case '\000': /* NUL (IGNORED) */
2398 case '\021': /* XON (IGNORED) */
2399 case '\023': /* XOFF (IGNORED) */
2400 case 0177: /* DEL (IGNORED) */
2401 case 0x84: /* TODO: IND */
2402 case 0x85: /* TODO: NEL */
2403 case 0x88: /* TODO: HTS */
2404 case 0x8d: /* TODO: RI */
2405 case 0x8e: /* TODO: SS2 */
2406 case 0x8f: /* TODO: SS3 */
2407 case 0x90: /* TODO: DCS */
2408 case 0x98: /* TODO: SOS */
2409 case 0x9a: /* TODO: DECID */
2410 case 0x9b: /* TODO: CSI */
2411 case 0x9c: /* TODO: ST */
2412 case 0x9d: /* TODO: OSC */
2413 case 0x9e: /* TODO: PM */
2414 case 0x9f: /* TODO: APC */
2415 break;
2416 default:
2417 return 0;
2418 }
2419 term.esc &= ~(ESC_STR_END|ESC_STR);
2420 return 1;
2421 }
2422
2423 void
2424 tdectest(char c) {
2425 static char E[UTF_SIZ] = "E";
2426 int x, y;
2427
2428 if(c == '8') { /* DEC screen alignment test. */
2429 for(x = 0; x < term.col; ++x) {
2430 for(y = 0; y < term.row; ++y)
2431 tsetchar(E, &term.c.attr, x, y);
2432 }
2433 }
2434 }
2435
2436 void
2437 tputc(char *c, int len) {
2438 uchar ascii;
2439 bool control;
2440 long unicodep;
2441 int width;
2442 Glyph *gp;
2443
2444 if(len == 1) {
2445 width = 1;
2446 unicodep = ascii = *c;
2447 } else {
2448 utf8decode(c, &unicodep, UTF_SIZ);
2449 width = wcwidth(unicodep);
2450 control = ISCONTROLC1(unicodep);
2451 ascii = unicodep;
2452 }
2453
2454 if(IS_SET(MODE_PRINT))
2455 tprinter(c, len);
2456 control = ISCONTROL(unicodep);
2457
2458 /*
2459 * STR sequence must be checked before anything else
2460 * because it uses all following characters until it
2461 * receives a ESC, a SUB, a ST or any other C1 control
2462 * character.
2463 */
2464 if(term.esc & ESC_STR) {
2465 if(width == 1 &&
2466 (ascii == '\a' || ascii == 030 ||
2467 ascii == 032 || ascii == 033 ||
2468 ISCONTROLC1(unicodep))) {
2469 term.esc &= ~ESC_STR;
2470 term.esc |= ESC_STR_END;
2471 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2472 memmove(&strescseq.buf[strescseq.len], c, len);
2473 strescseq.len += len;
2474 return;
2475 } else {
2476 /*
2477 * Here is a bug in terminals. If the user never sends
2478 * some code to stop the str or esc command, then st
2479 * will stop responding. But this is better than
2480 * silently failing with unknown characters. At least
2481 * then users will report back.
2482 *
2483 * In the case users ever get fixed, here is the code:
2484 */
2485 /*
2486 * term.esc = 0;
2487 * strhandle();
2488 */
2489 return;
2490 }
2491 }
2492
2493 /*
2494 * Actions of control codes must be performed as soon they arrive
2495 * because they can be embedded inside a control sequence, and
2496 * they must not cause conflicts with sequences.
2497 */
2498 if(control) {
2499 if (tcontrolcode(ascii))
2500 return;
2501 } else if(term.esc & ESC_START) {
2502 if(term.esc & ESC_CSI) {
2503 csiescseq.buf[csiescseq.len++] = ascii;
2504 if(BETWEEN(ascii, 0x40, 0x7E)
2505 || csiescseq.len >= \
2506 sizeof(csiescseq.buf)-1) {
2507 term.esc = 0;
2508 csiparse();
2509 csihandle();
2510 }
2511 return;
2512 } else if(term.esc & ESC_ALTCHARSET) {
2513 tdeftran(ascii);
2514 tselcs();
2515 } else if(term.esc & ESC_TEST) {
2516 tdectest(ascii);
2517 } else {
2518 switch(ascii) {
2519 case '[':
2520 term.esc |= ESC_CSI;
2521 return;
2522 case '#':
2523 term.esc |= ESC_TEST;
2524 return;
2525 case 'P': /* DCS -- Device Control String */
2526 case '_': /* APC -- Application Program Command */
2527 case '^': /* PM -- Privacy Message */
2528 case ']': /* OSC -- Operating System Command */
2529 case 'k': /* old title set compatibility */
2530 strreset();
2531 strescseq.type = ascii;
2532 term.esc |= ESC_STR;
2533 return;
2534 case '(': /* set primary charset G0 */
2535 case ')': /* set secondary charset G1 */
2536 case '*': /* set tertiary charset G2 */
2537 case '+': /* set quaternary charset G3 */
2538 term.icharset = ascii - '(';
2539 term.esc |= ESC_ALTCHARSET;
2540 return;
2541 case 'D': /* IND -- Linefeed */
2542 if(term.c.y == term.bot) {
2543 tscrollup(term.top, 1);
2544 } else {
2545 tmoveto(term.c.x, term.c.y+1);
2546 }
2547 break;
2548 case 'E': /* NEL -- Next line */
2549 tnewline(1); /* always go to first col */
2550 break;
2551 case 'H': /* HTS -- Horizontal tab stop */
2552 term.tabs[term.c.x] = 1;
2553 break;
2554 case 'M': /* RI -- Reverse index */
2555 if(term.c.y == term.top) {
2556 tscrolldown(term.top, 1);
2557 } else {
2558 tmoveto(term.c.x, term.c.y-1);
2559 }
2560 break;
2561 case 'Z': /* DECID -- Identify Terminal */
2562 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2563 break;
2564 case 'c': /* RIS -- Reset to inital state */
2565 treset();
2566 xresettitle();
2567 xloadcols();
2568 break;
2569 case '=': /* DECPAM -- Application keypad */
2570 term.mode |= MODE_APPKEYPAD;
2571 break;
2572 case '>': /* DECPNM -- Normal keypad */
2573 term.mode &= ~MODE_APPKEYPAD;
2574 break;
2575 case '7': /* DECSC -- Save Cursor */
2576 tcursor(CURSOR_SAVE);
2577 break;
2578 case '8': /* DECRC -- Restore Cursor */
2579 tcursor(CURSOR_LOAD);
2580 break;
2581 case '\\': /* ST -- String Terminator */
2582 if(term.esc & ESC_STR_END)
2583 strhandle();
2584 break;
2585 default:
2586 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2587 (uchar) ascii, isprint(ascii)? ascii:'.');
2588 break;
2589 }
2590 }
2591 term.esc = 0;
2592 /*
2593 * All characters which form part of a sequence are not
2594 * printed
2595 */
2596 return;
2597 }
2598 /*
2599 * Display control codes only if we are in graphic mode
2600 */
2601 if(control && !(term.c.attr.mode & ATTR_GFX))
2602 return;
2603 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2604 selclear(NULL);
2605
2606 gp = &term.line[term.c.y][term.c.x];
2607 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2608 gp->mode |= ATTR_WRAP;
2609 tnewline(1);
2610 }
2611
2612 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2613 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
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 gp->mode |= ATTR_WIDE;
2622 if(term.c.x+1 < term.col) {
2623 gp[1].c[0] = '\0';
2624 gp[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 && sel.alt == IS_SET(MODE_ALTSCREEN);
3489 long unicodep;
3490
3491 if(!(xw.state & WIN_VISIBLE))
3492 return;
3493
3494 for(y = y1; y < y2; y++) {
3495 if(!term.dirty[y])
3496 continue;
3497
3498 xtermclear(0, y, term.col, y);
3499 term.dirty[y] = 0;
3500 base = term.line[y][0];
3501 ic = ib = ox = 0;
3502 for(x = x1; x < x2; x++) {
3503 new = term.line[y][x];
3504 if(new.mode == ATTR_WDUMMY)
3505 continue;
3506 if(ena_sel && selected(x, y))
3507 new.mode ^= ATTR_REVERSE;
3508 if(ib > 0 && (ATTRCMP(base, new)
3509 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3510 xdraws(buf, base, ox, y, ic, ib);
3511 ic = ib = 0;
3512 }
3513 if(ib == 0) {
3514 ox = x;
3515 base = new;
3516 }
3517
3518 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3519 memcpy(buf+ib, new.c, sl);
3520 ib += sl;
3521 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3522 }
3523 if(ib > 0)
3524 xdraws(buf, base, ox, y, ic, ib);
3525 }
3526 xdrawcursor();
3527 }
3528
3529 void
3530 expose(XEvent *ev) {
3531 XExposeEvent *e = &ev->xexpose;
3532
3533 if(xw.state & WIN_REDRAW) {
3534 if(!e->count)
3535 xw.state &= ~WIN_REDRAW;
3536 }
3537 redraw(0);
3538 }
3539
3540 void
3541 visibility(XEvent *ev) {
3542 XVisibilityEvent *e = &ev->xvisibility;
3543
3544 if(e->state == VisibilityFullyObscured) {
3545 xw.state &= ~WIN_VISIBLE;
3546 } else if(!(xw.state & WIN_VISIBLE)) {
3547 /* need a full redraw for next Expose, not just a buf copy */
3548 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3549 }
3550 }
3551
3552 void
3553 unmap(XEvent *ev) {
3554 xw.state &= ~WIN_VISIBLE;
3555 }
3556
3557 void
3558 xsetpointermotion(int set) {
3559 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3560 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3561 }
3562
3563 void
3564 xseturgency(int add) {
3565 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3566
3567 MODBIT(h->flags, add, XUrgencyHint);
3568 XSetWMHints(xw.dpy, xw.win, h);
3569 XFree(h);
3570 }
3571
3572 void
3573 focus(XEvent *ev) {
3574 XFocusChangeEvent *e = &ev->xfocus;
3575
3576 if(e->mode == NotifyGrab)
3577 return;
3578
3579 if(ev->type == FocusIn) {
3580 XSetICFocus(xw.xic);
3581 xw.state |= WIN_FOCUSED;
3582 xseturgency(0);
3583 if(IS_SET(MODE_FOCUS))
3584 ttywrite("\033[I", 3);
3585 } else {
3586 XUnsetICFocus(xw.xic);
3587 xw.state &= ~WIN_FOCUSED;
3588 if(IS_SET(MODE_FOCUS))
3589 ttywrite("\033[O", 3);
3590 }
3591 }
3592
3593 static inline bool
3594 match(uint mask, uint state) {
3595 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3596 }
3597
3598 void
3599 numlock(const Arg *dummy) {
3600 term.numlock ^= 1;
3601 }
3602
3603 char*
3604 kmap(KeySym k, uint state) {
3605 Key *kp;
3606 int i;
3607
3608 /* Check for mapped keys out of X11 function keys. */
3609 for(i = 0; i < LEN(mappedkeys); i++) {
3610 if(mappedkeys[i] == k)
3611 break;
3612 }
3613 if(i == LEN(mappedkeys)) {
3614 if((k & 0xFFFF) < 0xFD00)
3615 return NULL;
3616 }
3617
3618 for(kp = key; kp < key + LEN(key); kp++) {
3619 if(kp->k != k)
3620 continue;
3621
3622 if(!match(kp->mask, state))
3623 continue;
3624
3625 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3626 continue;
3627 if(term.numlock && kp->appkey == 2)
3628 continue;
3629
3630 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3631 continue;
3632
3633 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3634 continue;
3635
3636 return kp->s;
3637 }
3638
3639 return NULL;
3640 }
3641
3642 void
3643 kpress(XEvent *ev) {
3644 XKeyEvent *e = &ev->xkey;
3645 KeySym ksym;
3646 char buf[32], *customkey;
3647 int len;
3648 long c;
3649 Status status;
3650 Shortcut *bp;
3651
3652 if(IS_SET(MODE_KBDLOCK))
3653 return;
3654
3655 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3656 /* 1. shortcuts */
3657 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3658 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3659 bp->func(&(bp->arg));
3660 return;
3661 }
3662 }
3663
3664 /* 2. custom keys from config.h */
3665 if((customkey = kmap(ksym, e->state))) {
3666 ttysend(customkey, strlen(customkey));
3667 return;
3668 }
3669
3670 /* 3. composed string from input method */
3671 if(len == 0)
3672 return;
3673 if(len == 1 && e->state & Mod1Mask) {
3674 if(IS_SET(MODE_8BIT)) {
3675 if(*buf < 0177) {
3676 c = *buf | 0x80;
3677 len = utf8encode(c, buf, UTF_SIZ);
3678 }
3679 } else {
3680 buf[1] = buf[0];
3681 buf[0] = '\033';
3682 len = 2;
3683 }
3684 }
3685 ttysend(buf, len);
3686 }
3687
3688
3689 void
3690 cmessage(XEvent *e) {
3691 /*
3692 * See xembed specs
3693 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3694 */
3695 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3696 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3697 xw.state |= WIN_FOCUSED;
3698 xseturgency(0);
3699 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3700 xw.state &= ~WIN_FOCUSED;
3701 }
3702 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3703 /* Send SIGHUP to shell */
3704 kill(pid, SIGHUP);
3705 exit(EXIT_SUCCESS);
3706 }
3707 }
3708
3709 void
3710 cresize(int width, int height) {
3711 int col, row;
3712
3713 if(width != 0)
3714 xw.w = width;
3715 if(height != 0)
3716 xw.h = height;
3717
3718 col = (xw.w - 2 * borderpx) / xw.cw;
3719 row = (xw.h - 2 * borderpx) / xw.ch;
3720
3721 tresize(col, row);
3722 xresize(col, row);
3723 ttyresize();
3724 }
3725
3726 void
3727 resize(XEvent *e) {
3728 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3729 return;
3730
3731 cresize(e->xconfigure.width, e->xconfigure.height);
3732 }
3733
3734 void
3735 run(void) {
3736 XEvent ev;
3737 int w = xw.w, h = xw.h;
3738 fd_set rfd;
3739 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3740 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3741
3742 /* Waiting for window mapping */
3743 while(1) {
3744 XNextEvent(xw.dpy, &ev);
3745 if(ev.type == ConfigureNotify) {
3746 w = ev.xconfigure.width;
3747 h = ev.xconfigure.height;
3748 } else if(ev.type == MapNotify) {
3749 break;
3750 }
3751 }
3752
3753 ttynew();
3754 cresize(w, h);
3755
3756 gettimeofday(&last, NULL);
3757 lastblink = last;
3758
3759 for(xev = actionfps;;) {
3760 long deltatime;
3761
3762 FD_ZERO(&rfd);
3763 FD_SET(cmdfd, &rfd);
3764 FD_SET(xfd, &rfd);
3765
3766 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3767 if(errno == EINTR)
3768 continue;
3769 die("select failed: %s\n", strerror(errno));
3770 }
3771 if(FD_ISSET(cmdfd, &rfd)) {
3772 ttyread();
3773 if(blinktimeout) {
3774 blinkset = tattrset(ATTR_BLINK);
3775 if(!blinkset)
3776 MODBIT(term.mode, 0, MODE_BLINK);
3777 }
3778 }
3779
3780 if(FD_ISSET(xfd, &rfd))
3781 xev = actionfps;
3782
3783 gettimeofday(&now, NULL);
3784 drawtimeout.tv_sec = 0;
3785 drawtimeout.tv_usec = (1000/xfps) * 1000;
3786 tv = &drawtimeout;
3787
3788 dodraw = 0;
3789 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3790 tsetdirtattr(ATTR_BLINK);
3791 term.mode ^= MODE_BLINK;
3792 lastblink = now;
3793 dodraw = 1;
3794 }
3795 deltatime = TIMEDIFF(now, last);
3796 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3797 || deltatime < 0) {
3798 dodraw = 1;
3799 last = now;
3800 }
3801
3802 if(dodraw) {
3803 while(XPending(xw.dpy)) {
3804 XNextEvent(xw.dpy, &ev);
3805 if(XFilterEvent(&ev, None))
3806 continue;
3807 if(handler[ev.type])
3808 (handler[ev.type])(&ev);
3809 }
3810
3811 draw();
3812 XFlush(xw.dpy);
3813
3814 if(xev && !FD_ISSET(xfd, &rfd))
3815 xev--;
3816 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3817 if(blinkset) {
3818 if(TIMEDIFF(now, lastblink) \
3819 > blinktimeout) {
3820 drawtimeout.tv_usec = 1;
3821 } else {
3822 drawtimeout.tv_usec = (1000 * \
3823 (blinktimeout - \
3824 TIMEDIFF(now,
3825 lastblink)));
3826 }
3827 } else {
3828 tv = NULL;
3829 }
3830 }
3831 }
3832 }
3833 }
3834
3835 void
3836 usage(void) {
3837 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3838 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3839 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3840 }
3841
3842 int
3843 main(int argc, char *argv[]) {
3844 char *titles;
3845 uint cols = 80, rows = 24;
3846
3847 xw.l = xw.t = 0;
3848 xw.isfixed = False;
3849
3850 ARGBEGIN {
3851 case 'a':
3852 allowaltscreen = false;
3853 break;
3854 case 'c':
3855 opt_class = EARGF(usage());
3856 break;
3857 case 'e':
3858 /* eat all remaining arguments */
3859 if(argc > 1) {
3860 opt_cmd = &argv[1];
3861 if(argv[1] != NULL && opt_title == NULL) {
3862 titles = xstrdup(argv[1]);
3863 opt_title = basename(titles);
3864 }
3865 }
3866 goto run;
3867 case 'f':
3868 opt_font = EARGF(usage());
3869 break;
3870 case 'g':
3871 xw.gm = XParseGeometry(EARGF(usage()),
3872 &xw.l, &xw.t, &cols, &rows);
3873 break;
3874 case 'i':
3875 xw.isfixed = True;
3876 break;
3877 case 'o':
3878 opt_io = EARGF(usage());
3879 break;
3880 case 't':
3881 opt_title = EARGF(usage());
3882 break;
3883 case 'w':
3884 opt_embed = EARGF(usage());
3885 break;
3886 case 'v':
3887 default:
3888 usage();
3889 } ARGEND;
3890
3891 run:
3892 setlocale(LC_CTYPE, "");
3893 XSetLocaleModifiers("");
3894 tnew(cols? cols : 1, rows? rows : 1);
3895 xinit();
3896 selinit();
3897 run();
3898
3899 return 0;
3900 }
3901