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