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