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4c4a0c35bf57e8a0198600a3f26a497128b34adc
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a)[0])
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f))
74 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
75 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
80 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
81 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
82
83 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
84 #define IS_TRUECOL(x) (1 << 24 & (x))
85 #define TRUERED(x) (((x) & 0xff0000) >> 8)
86 #define TRUEGREEN(x) (((x) & 0xff00))
87 #define TRUEBLUE(x) (((x) & 0xff) << 8)
88
89
90 #define VT102ID "\033[?6c"
91
92 enum glyph_attribute {
93 ATTR_NULL = 0,
94 ATTR_REVERSE = 1,
95 ATTR_UNDERLINE = 2,
96 ATTR_BOLD = 4,
97 ATTR_GFX = 8,
98 ATTR_ITALIC = 16,
99 ATTR_BLINK = 32,
100 ATTR_WRAP = 64,
101 ATTR_WIDE = 128,
102 ATTR_WDUMMY = 256,
103 };
104
105 enum cursor_movement {
106 CURSOR_SAVE,
107 CURSOR_LOAD
108 };
109
110 enum cursor_state {
111 CURSOR_DEFAULT = 0,
112 CURSOR_WRAPNEXT = 1,
113 CURSOR_ORIGIN = 2
114 };
115
116 enum term_mode {
117 MODE_WRAP = 1,
118 MODE_INSERT = 2,
119 MODE_APPKEYPAD = 4,
120 MODE_ALTSCREEN = 8,
121 MODE_CRLF = 16,
122 MODE_MOUSEBTN = 32,
123 MODE_MOUSEMOTION = 64,
124 MODE_REVERSE = 128,
125 MODE_KBDLOCK = 256,
126 MODE_HIDE = 512,
127 MODE_ECHO = 1024,
128 MODE_APPCURSOR = 2048,
129 MODE_MOUSESGR = 4096,
130 MODE_8BIT = 8192,
131 MODE_BLINK = 16384,
132 MODE_FBLINK = 32768,
133 MODE_FOCUS = 65536,
134 MODE_MOUSEX10 = 131072,
135 MODE_MOUSEMANY = 262144,
136 MODE_BRCKTPASTE = 524288,
137 MODE_PRINT = 1048576,
138 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
139 |MODE_MOUSEMANY,
140 };
141
142 enum charset {
143 CS_GRAPHIC0,
144 CS_GRAPHIC1,
145 CS_UK,
146 CS_USA,
147 CS_MULTI,
148 CS_GER,
149 CS_FIN
150 };
151
152 enum escape_state {
153 ESC_START = 1,
154 ESC_CSI = 2,
155 ESC_STR = 4, /* DCS, OSC, PM, APC */
156 ESC_ALTCHARSET = 8,
157 ESC_STR_END = 16, /* a final string was encountered */
158 ESC_TEST = 32, /* Enter in test mode */
159 };
160
161 enum window_state {
162 WIN_VISIBLE = 1,
163 WIN_REDRAW = 2,
164 WIN_FOCUSED = 4
165 };
166
167 enum selection_type {
168 SEL_REGULAR = 1,
169 SEL_RECTANGULAR = 2
170 };
171
172 enum selection_snap {
173 SNAP_WORD = 1,
174 SNAP_LINE = 2
175 };
176
177 typedef unsigned char uchar;
178 typedef unsigned int uint;
179 typedef unsigned long ulong;
180 typedef unsigned short ushort;
181
182 typedef XftDraw *Draw;
183 typedef XftColor Colour;
184 typedef Colormap Colourmap;
185
186 typedef struct {
187 char c[UTF_SIZ]; /* character code */
188 ushort mode; /* attribute flags */
189 uint32_t fg; /* foreground */
190 uint32_t bg; /* background */
191 } Glyph;
192
193 typedef Glyph *Line;
194
195 typedef struct {
196 Glyph attr; /* current char attributes */
197 int x;
198 int y;
199 char state;
200 } TCursor;
201
202 /* CSI Escape sequence structs */
203 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
204 typedef struct {
205 char buf[ESC_BUF_SIZ]; /* raw string */
206 int len; /* raw string length */
207 char priv;
208 int arg[ESC_ARG_SIZ];
209 int narg; /* nb of args */
210 char mode;
211 } CSIEscape;
212
213 /* STR Escape sequence structs */
214 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
215 typedef struct {
216 char type; /* ESC type ... */
217 char buf[STR_BUF_SIZ]; /* raw string */
218 int len; /* raw string length */
219 char *args[STR_ARG_SIZ];
220 int narg; /* nb of args */
221 } STREscape;
222
223 /* Internal representation of the screen */
224 typedef struct {
225 int row; /* nb row */
226 int col; /* nb col */
227 Line *line; /* screen */
228 Line *alt; /* alternate screen */
229 bool *dirty; /* dirtyness of lines */
230 TCursor c; /* cursor */
231 int top; /* top scroll limit */
232 int bot; /* bottom scroll limit */
233 int mode; /* terminal mode flags */
234 int esc; /* escape state flags */
235 char trantbl[4]; /* charset table translation */
236 int charset; /* current charset */
237 int icharset; /* selected charset for sequence */
238 bool numlock; /* lock numbers in keyboard */
239 bool *tabs;
240 } Term;
241
242 /* Purely graphic info */
243 typedef struct {
244 Display *dpy;
245 Colourmap cmap;
246 Window win;
247 Drawable buf;
248 Atom xembed, wmdeletewin, netwmname, netwmpid;
249 XIM xim;
250 XIC xic;
251 Draw draw;
252 Visual *vis;
253 XSetWindowAttributes attrs;
254 int scr;
255 bool isfixed; /* is fixed geometry? */
256 int l, t; /* left and top offset */
257 int gm; /* geometry mask */
258 int tw, th; /* tty width and height */
259 int w, h; /* window width and height */
260 int ch; /* char height */
261 int cw; /* char width */
262 char state; /* focus, redraw, visible */
263 } XWindow;
264
265 typedef struct {
266 uint b;
267 uint mask;
268 char *s;
269 } Mousekey;
270
271 typedef struct {
272 KeySym k;
273 uint mask;
274 char *s;
275 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
276 signed char appkey; /* application keypad */
277 signed char appcursor; /* application cursor */
278 signed char crlf; /* crlf mode */
279 } Key;
280
281 typedef struct {
282 int mode;
283 int type;
284 int snap;
285 /*
286 * Selection variables:
287 * nb – normalized coordinates of the beginning of the selection
288 * ne – normalized coordinates of the end of the selection
289 * ob – original coordinates of the beginning of the selection
290 * oe – original coordinates of the end of the selection
291 */
292 struct {
293 int x, y;
294 } nb, ne, ob, oe;
295
296 char *clip;
297 Atom xtarget;
298 bool alt;
299 struct timeval tclick1;
300 struct timeval tclick2;
301 } Selection;
302
303 typedef union {
304 int i;
305 uint ui;
306 float f;
307 const void *v;
308 } Arg;
309
310 typedef struct {
311 uint mod;
312 KeySym keysym;
313 void (*func)(const Arg *);
314 const Arg arg;
315 } Shortcut;
316
317 /* function definitions used in config.h */
318 static void clippaste(const Arg *);
319 static void numlock(const Arg *);
320 static void selpaste(const Arg *);
321 static void xzoom(const Arg *);
322 static void printsel(const Arg *);
323 static void printscreen(const Arg *) ;
324 static void toggleprinter(const Arg *);
325
326 /* Config.h for applying patches and the configuration. */
327 #include "config.h"
328
329 /* Font structure */
330 typedef struct {
331 int height;
332 int width;
333 int ascent;
334 int descent;
335 short lbearing;
336 short rbearing;
337 XftFont *match;
338 FcFontSet *set;
339 FcPattern *pattern;
340 } Font;
341
342 /* Drawing Context */
343 typedef struct {
344 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
345 Font font, bfont, ifont, ibfont;
346 GC gc;
347 } DC;
348
349 static void die(const char *, ...);
350 static void draw(void);
351 static void redraw(int);
352 static void drawregion(int, int, int, int);
353 static void execsh(void);
354 static void sigchld(int);
355 static void run(void);
356
357 static void csidump(void);
358 static void csihandle(void);
359 static void csiparse(void);
360 static void csireset(void);
361 static void strdump(void);
362 static void strhandle(void);
363 static void strparse(void);
364 static void strreset(void);
365
366 static int tattrset(int);
367 static void tprinter(char *, size_t);
368 static void tdumpsel(void);
369 static void tdumpline(int);
370 static void tdump(void);
371 static void tclearregion(int, int, int, int);
372 static void tcursor(int);
373 static void tdeletechar(int);
374 static void tdeleteline(int);
375 static void tinsertblank(int);
376 static void tinsertblankline(int);
377 static void tmoveto(int, int);
378 static void tmoveato(int, int);
379 static void tnew(int, int);
380 static void tnewline(int);
381 static void tputtab(int);
382 static void tputc(char *, int);
383 static void treset(void);
384 static int tresize(int, int);
385 static void tscrollup(int, int);
386 static void tscrolldown(int, int);
387 static void tsetattr(int *, int);
388 static void tsetchar(char *, Glyph *, int, int);
389 static void tsetscroll(int, int);
390 static void tswapscreen(void);
391 static void tsetdirt(int, int);
392 static void tsetdirtattr(int);
393 static void tsetmode(bool, bool, int *, int);
394 static void tfulldirt(void);
395 static void techo(char *, int);
396 static bool tcontrolcode(uchar );
397 static void tdectest(char );
398 static int32_t tdefcolor(int *, int *, int);
399 static void tselcs(void);
400 static void tdeftran(char);
401 static inline bool match(uint, uint);
402 static void ttynew(void);
403 static void ttyread(void);
404 static void ttyresize(void);
405 static void ttysend(char *, size_t);
406 static void ttywrite(const char *, size_t);
407
408 static void xdraws(char *, Glyph, int, int, int, int);
409 static void xhints(void);
410 static void xclear(int, int, int, int);
411 static void xdrawcursor(void);
412 static void xinit(void);
413 static void xloadcols(void);
414 static int xsetcolorname(int, const char *);
415 static int xgeommasktogravity(int);
416 static int xloadfont(Font *, FcPattern *);
417 static void xloadfonts(char *, double);
418 static int xloadfontset(Font *);
419 static void xsettitle(char *);
420 static void xresettitle(void);
421 static void xsetpointermotion(int);
422 static void xseturgency(int);
423 static void xsetsel(char *);
424 static void xtermclear(int, int, int, int);
425 static void xunloadfont(Font *);
426 static void xunloadfonts(void);
427 static void xresize(int, int);
428
429 static void expose(XEvent *);
430 static void visibility(XEvent *);
431 static void unmap(XEvent *);
432 static char *kmap(KeySym, uint);
433 static void kpress(XEvent *);
434 static void cmessage(XEvent *);
435 static void cresize(int, int);
436 static void resize(XEvent *);
437 static void focus(XEvent *);
438 static void brelease(XEvent *);
439 static void bpress(XEvent *);
440 static void bmotion(XEvent *);
441 static void selnotify(XEvent *);
442 static void selclear(XEvent *);
443 static void selrequest(XEvent *);
444
445 static void selinit(void);
446 static void selsort(void);
447 static inline bool selected(int, int);
448 static char *getsel(void);
449 static void selcopy(void);
450 static void selscroll(int, int);
451 static void selsnap(int, int *, int *, int);
452 static void getbuttoninfo(XEvent *);
453 static void mousereport(XEvent *);
454
455 static size_t utf8decode(char *, long *, size_t);
456 static long utf8decodebyte(char, size_t *);
457 static size_t utf8encode(long, char *, size_t);
458 static char utf8encodebyte(long, size_t);
459 static size_t utf8len(char *);
460 static size_t utf8validate(long *, size_t);
461
462 static ssize_t xwrite(int, const char *, size_t);
463 static void *xmalloc(size_t);
464 static void *xrealloc(void *, size_t);
465 static char *xstrdup(char *);
466
467 static void usage(void);
468
469 static void (*handler[LASTEvent])(XEvent *) = {
470 [KeyPress] = kpress,
471 [ClientMessage] = cmessage,
472 [ConfigureNotify] = resize,
473 [VisibilityNotify] = visibility,
474 [UnmapNotify] = unmap,
475 [Expose] = expose,
476 [FocusIn] = focus,
477 [FocusOut] = focus,
478 [MotionNotify] = bmotion,
479 [ButtonPress] = bpress,
480 [ButtonRelease] = brelease,
481 [SelectionClear] = selclear,
482 [SelectionNotify] = selnotify,
483 [SelectionRequest] = selrequest,
484 };
485
486 /* Globals */
487 static DC dc;
488 static XWindow xw;
489 static Term term;
490 static CSIEscape csiescseq;
491 static STREscape strescseq;
492 static int cmdfd;
493 static pid_t pid;
494 static Selection sel;
495 static int iofd = STDOUT_FILENO;
496 static char **opt_cmd = NULL;
497 static char *opt_io = NULL;
498 static char *opt_title = NULL;
499 static char *opt_embed = NULL;
500 static char *opt_class = NULL;
501 static char *opt_font = NULL;
502 static int oldbutton = 3; /* button event on startup: 3 = release */
503
504 static char *usedfont = NULL;
505 static double usedfontsize = 0;
506
507 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
508 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
509 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
510 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
511
512 /* Font Ring Cache */
513 enum {
514 FRC_NORMAL,
515 FRC_ITALIC,
516 FRC_BOLD,
517 FRC_ITALICBOLD
518 };
519
520 typedef struct {
521 XftFont *font;
522 int flags;
523 } Fontcache;
524
525 /* Fontcache is an array now. A new font will be appended to the array. */
526 static Fontcache frc[16];
527 static int frclen = 0;
528
529 ssize_t
530 xwrite(int fd, const char *s, size_t len) {
531 size_t aux = len;
532
533 while(len > 0) {
534 ssize_t r = write(fd, s, len);
535 if(r < 0)
536 return r;
537 len -= r;
538 s += r;
539 }
540 return aux;
541 }
542
543 void *
544 xmalloc(size_t len) {
545 void *p = malloc(len);
546
547 if(!p)
548 die("Out of memory\n");
549
550 return p;
551 }
552
553 void *
554 xrealloc(void *p, size_t len) {
555 if((p = realloc(p, len)) == NULL)
556 die("Out of memory\n");
557
558 return p;
559 }
560
561 char *
562 xstrdup(char *s) {
563 if((s = strdup(s)) == NULL)
564 die("Out of memory\n");
565
566 return s;
567 }
568
569 size_t
570 utf8decode(char *c, long *u, size_t clen) {
571 size_t i, j, len, type;
572 long udecoded;
573
574 *u = UTF_INVALID;
575 if(!clen)
576 return 0;
577 udecoded = utf8decodebyte(c[0], &len);
578 if(!BETWEEN(len, 1, UTF_SIZ))
579 return 1;
580 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
581 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
582 if(type != 0)
583 return j;
584 }
585 if(j < len)
586 return 0;
587 *u = udecoded;
588 utf8validate(u, len);
589 return len;
590 }
591
592 long
593 utf8decodebyte(char c, size_t *i) {
594 for(*i = 0; *i < LEN(utfmask); ++(*i))
595 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
596 return (uchar)c & ~utfmask[*i];
597 return 0;
598 }
599
600 size_t
601 utf8encode(long u, char *c, size_t clen) {
602 size_t len, i;
603
604 len = utf8validate(&u, 0);
605 if(clen < len)
606 return 0;
607 for(i = len - 1; i != 0; --i) {
608 c[i] = utf8encodebyte(u, 0);
609 u >>= 6;
610 }
611 c[0] = utf8encodebyte(u, len);
612 return len;
613 }
614
615 char
616 utf8encodebyte(long u, size_t i) {
617 return utfbyte[i] | (u & ~utfmask[i]);
618 }
619
620 size_t
621 utf8len(char *c) {
622 return utf8decode(c, &(long){0}, UTF_SIZ);
623 }
624
625 size_t
626 utf8validate(long *u, size_t i) {
627 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
628 *u = UTF_INVALID;
629 for(i = 1; *u > utfmax[i]; ++i)
630 ;
631 return i;
632 }
633
634 static void
635 selinit(void) {
636 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
637 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
638 sel.mode = 0;
639 sel.ob.x = -1;
640 sel.clip = NULL;
641 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
642 if(sel.xtarget == None)
643 sel.xtarget = XA_STRING;
644 }
645
646 static int
647 x2col(int x) {
648 x -= borderpx;
649 x /= xw.cw;
650
651 return LIMIT(x, 0, term.col-1);
652 }
653
654 static int
655 y2row(int y) {
656 y -= borderpx;
657 y /= xw.ch;
658
659 return LIMIT(y, 0, term.row-1);
660 }
661
662 static void
663 selsort(void) {
664 if(sel.ob.y == sel.oe.y) {
665 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
666 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
667 } else {
668 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
669 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
670 }
671 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
672 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
673 }
674
675 static inline bool
676 selected(int x, int y) {
677 if(sel.ne.y == y && sel.nb.y == y)
678 return BETWEEN(x, sel.nb.x, sel.ne.x);
679
680 if(sel.type == SEL_RECTANGULAR) {
681 return ((sel.nb.y <= y && y <= sel.ne.y)
682 && (sel.nb.x <= x && x <= sel.ne.x));
683 }
684
685 return ((sel.nb.y < y && y < sel.ne.y)
686 || (y == sel.ne.y && x <= sel.ne.x))
687 || (y == sel.nb.y && x >= sel.nb.x
688 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
689 }
690
691 void
692 selsnap(int mode, int *x, int *y, int direction) {
693 int i;
694
695 switch(mode) {
696 case SNAP_WORD:
697 /*
698 * Snap around if the word wraps around at the end or
699 * beginning of a line.
700 */
701 for(;;) {
702 if(direction < 0 && *x <= 0) {
703 if(*y > 0 && term.line[*y - 1][term.col-1].mode
704 & ATTR_WRAP) {
705 *y -= 1;
706 *x = term.col-1;
707 } else {
708 break;
709 }
710 }
711 if(direction > 0 && *x >= term.col-1) {
712 if(*y < term.row-1 && term.line[*y][*x].mode
713 & ATTR_WRAP) {
714 *y += 1;
715 *x = 0;
716 } else {
717 break;
718 }
719 }
720
721 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
722 *x += direction;
723 continue;
724 }
725
726 if(strchr(worddelimiters,
727 term.line[*y][*x+direction].c[0])) {
728 break;
729 }
730
731 *x += direction;
732 }
733 break;
734 case SNAP_LINE:
735 /*
736 * Snap around if the the previous line or the current one
737 * has set ATTR_WRAP at its end. Then the whole next or
738 * previous line will be selected.
739 */
740 *x = (direction < 0) ? 0 : term.col - 1;
741 if(direction < 0 && *y > 0) {
742 for(; *y > 0; *y += direction) {
743 if(!(term.line[*y-1][term.col-1].mode
744 & ATTR_WRAP)) {
745 break;
746 }
747 }
748 } else if(direction > 0 && *y < term.row-1) {
749 for(; *y < term.row; *y += direction) {
750 if(!(term.line[*y][term.col-1].mode
751 & ATTR_WRAP)) {
752 break;
753 }
754 }
755 }
756 break;
757 default:
758 /*
759 * Select the whole line when the end of line is reached.
760 */
761 if(direction > 0) {
762 i = term.col;
763 while(--i > 0 && term.line[*y][i].c[0] == ' ')
764 /* nothing */;
765 if(i > 0 && i < *x)
766 *x = term.col - 1;
767 }
768 break;
769 }
770 }
771
772 void
773 getbuttoninfo(XEvent *e) {
774 int type;
775 uint state = e->xbutton.state &~Button1Mask;
776
777 sel.alt = IS_SET(MODE_ALTSCREEN);
778
779 sel.oe.x = x2col(e->xbutton.x);
780 sel.oe.y = y2row(e->xbutton.y);
781
782 if(sel.ob.y < sel.oe.y
783 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
784 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
785 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
786 } else {
787 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
788 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
789 }
790 selsort();
791
792 sel.type = SEL_REGULAR;
793 for(type = 1; type < LEN(selmasks); ++type) {
794 if(match(selmasks[type], state)) {
795 sel.type = type;
796 break;
797 }
798 }
799 }
800
801 void
802 mousereport(XEvent *e) {
803 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
804 button = e->xbutton.button, state = e->xbutton.state,
805 len;
806 char buf[40];
807 static int ox, oy;
808
809 /* from urxvt */
810 if(e->xbutton.type == MotionNotify) {
811 if(x == ox && y == oy)
812 return;
813 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
814 return;
815 /* MOUSE_MOTION: no reporting if no button is pressed */
816 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
817 return;
818
819 button = oldbutton + 32;
820 ox = x;
821 oy = y;
822 } else {
823 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
824 button = 3;
825 } else {
826 button -= Button1;
827 if(button >= 3)
828 button += 64 - 3;
829 }
830 if(e->xbutton.type == ButtonPress) {
831 oldbutton = button;
832 ox = x;
833 oy = y;
834 } else if(e->xbutton.type == ButtonRelease) {
835 oldbutton = 3;
836 /* MODE_MOUSEX10: no button release reporting */
837 if(IS_SET(MODE_MOUSEX10))
838 return;
839 }
840 }
841
842 if(!IS_SET(MODE_MOUSEX10)) {
843 button += (state & ShiftMask ? 4 : 0)
844 + (state & Mod4Mask ? 8 : 0)
845 + (state & ControlMask ? 16 : 0);
846 }
847
848 len = 0;
849 if(IS_SET(MODE_MOUSESGR)) {
850 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
851 button, x+1, y+1,
852 e->xbutton.type == ButtonRelease ? 'm' : 'M');
853 } else if(x < 223 && y < 223) {
854 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
855 32+button, 32+x+1, 32+y+1);
856 } else {
857 return;
858 }
859
860 ttywrite(buf, len);
861 }
862
863 void
864 bpress(XEvent *e) {
865 struct timeval now;
866 Mousekey *mk;
867
868 if(IS_SET(MODE_MOUSE)) {
869 mousereport(e);
870 return;
871 }
872
873 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
874 if(e->xbutton.button == mk->b
875 && match(mk->mask, e->xbutton.state)) {
876 ttysend(mk->s, strlen(mk->s));
877 return;
878 }
879 }
880
881 if(e->xbutton.button == Button1) {
882 gettimeofday(&now, NULL);
883
884 /* Clear previous selection, logically and visually. */
885 selclear(NULL);
886 sel.mode = 1;
887 sel.type = SEL_REGULAR;
888 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
889 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
890
891 /*
892 * If the user clicks below predefined timeouts specific
893 * snapping behaviour is exposed.
894 */
895 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
896 sel.snap = SNAP_LINE;
897 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
898 sel.snap = SNAP_WORD;
899 } else {
900 sel.snap = 0;
901 }
902 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
903 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
904 selsort();
905
906 /*
907 * Draw selection, unless it's regular and we don't want to
908 * make clicks visible
909 */
910 if(sel.snap != 0) {
911 sel.mode++;
912 tsetdirt(sel.nb.y, sel.ne.y);
913 }
914 sel.tclick2 = sel.tclick1;
915 sel.tclick1 = now;
916 }
917 }
918
919 char *
920 getsel(void) {
921 char *str, *ptr;
922 int x, y, bufsize, size, i, ex;
923 Glyph *gp, *last;
924
925 if(sel.ob.x == -1) {
926 str = NULL;
927 } else {
928 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
929 ptr = str = xmalloc(bufsize);
930
931 /* append every set & selected glyph to the selection */
932 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
933 gp = &term.line[y][0];
934 last = &gp[term.col-1];
935
936 while(last >= gp && !(selected(last - gp, y) &&
937 strcmp(last->c, " ") != 0)) {
938 --last;
939 }
940
941 for(x = 0; gp <= last; x++, ++gp) {
942 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
943 continue;
944
945 size = utf8len(gp->c);
946 memcpy(ptr, gp->c, size);
947 ptr += size;
948 }
949
950 /*
951 * Copy and pasting of line endings is inconsistent
952 * in the inconsistent terminal and GUI world.
953 * The best solution seems like to produce '\n' when
954 * something is copied from st and convert '\n' to
955 * '\r', when something to be pasted is received by
956 * st.
957 * FIXME: Fix the computer world.
958 */
959 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
960 *ptr++ = '\n';
961
962 /*
963 * If the last selected line expands in the selection
964 * after the visible text '\n' is appended.
965 */
966 if(y == sel.ne.y) {
967 i = term.col;
968 while(--i > 0 && term.line[y][i].c[0] == ' ')
969 /* nothing */;
970 ex = sel.ne.x;
971 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
972 ex = sel.nb.x;
973 if(i < ex)
974 *ptr++ = '\n';
975 }
976 }
977 *ptr = 0;
978 }
979 return str;
980 }
981
982 void
983 selcopy(void) {
984 xsetsel(getsel());
985 }
986
987 void
988 selnotify(XEvent *e) {
989 ulong nitems, ofs, rem;
990 int format;
991 uchar *data, *last, *repl;
992 Atom type;
993
994 ofs = 0;
995 do {
996 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
997 False, AnyPropertyType, &type, &format,
998 &nitems, &rem, &data)) {
999 fprintf(stderr, "Clipboard allocation failed\n");
1000 return;
1001 }
1002
1003 /*
1004 * As seen in getsel:
1005 * Line endings are inconsistent in the terminal and GUI world
1006 * copy and pasting. When receiving some selection data,
1007 * replace all '\n' with '\r'.
1008 * FIXME: Fix the computer world.
1009 */
1010 repl = data;
1011 last = data + nitems * format / 8;
1012 while((repl = memchr(repl, '\n', last - repl))) {
1013 *repl++ = '\r';
1014 }
1015
1016 if(IS_SET(MODE_BRCKTPASTE))
1017 ttywrite("\033[200~", 6);
1018 ttysend((char *)data, nitems * format / 8);
1019 if(IS_SET(MODE_BRCKTPASTE))
1020 ttywrite("\033[201~", 6);
1021 XFree(data);
1022 /* number of 32-bit chunks returned */
1023 ofs += nitems * format / 32;
1024 } while(rem > 0);
1025 }
1026
1027 void
1028 selpaste(const Arg *dummy) {
1029 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1030 xw.win, CurrentTime);
1031 }
1032
1033 void
1034 clippaste(const Arg *dummy) {
1035 Atom clipboard;
1036
1037 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1038 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1039 xw.win, CurrentTime);
1040 }
1041
1042 void
1043 selclear(XEvent *e) {
1044 if(sel.ob.x == -1)
1045 return;
1046 sel.ob.x = -1;
1047 tsetdirt(sel.nb.y, sel.ne.y);
1048 }
1049
1050 void
1051 selrequest(XEvent *e) {
1052 XSelectionRequestEvent *xsre;
1053 XSelectionEvent xev;
1054 Atom xa_targets, string;
1055
1056 xsre = (XSelectionRequestEvent *) e;
1057 xev.type = SelectionNotify;
1058 xev.requestor = xsre->requestor;
1059 xev.selection = xsre->selection;
1060 xev.target = xsre->target;
1061 xev.time = xsre->time;
1062 /* reject */
1063 xev.property = None;
1064
1065 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1066 if(xsre->target == xa_targets) {
1067 /* respond with the supported type */
1068 string = sel.xtarget;
1069 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1070 XA_ATOM, 32, PropModeReplace,
1071 (uchar *) &string, 1);
1072 xev.property = xsre->property;
1073 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1074 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1075 xsre->target, 8, PropModeReplace,
1076 (uchar *) sel.clip, strlen(sel.clip));
1077 xev.property = xsre->property;
1078 }
1079
1080 /* all done, send a notification to the listener */
1081 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1082 fprintf(stderr, "Error sending SelectionNotify event\n");
1083 }
1084
1085 void
1086 xsetsel(char *str) {
1087 /* register the selection for both the clipboard and the primary */
1088 Atom clipboard;
1089
1090 free(sel.clip);
1091 sel.clip = str;
1092
1093 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1094
1095 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1096 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1097 }
1098
1099 void
1100 brelease(XEvent *e) {
1101 if(IS_SET(MODE_MOUSE)) {
1102 mousereport(e);
1103 return;
1104 }
1105
1106 if(e->xbutton.button == Button2) {
1107 selpaste(NULL);
1108 } else if(e->xbutton.button == Button1) {
1109 if(sel.mode < 2) {
1110 selclear(NULL);
1111 } else {
1112 getbuttoninfo(e);
1113 selcopy();
1114 }
1115 sel.mode = 0;
1116 tsetdirt(sel.nb.y, sel.ne.y);
1117 }
1118 }
1119
1120 void
1121 bmotion(XEvent *e) {
1122 int oldey, oldex, oldsby, oldsey;
1123
1124 if(IS_SET(MODE_MOUSE)) {
1125 mousereport(e);
1126 return;
1127 }
1128
1129 if(!sel.mode)
1130 return;
1131
1132 sel.mode++;
1133 oldey = sel.oe.y;
1134 oldex = sel.oe.x;
1135 oldsby = sel.nb.y;
1136 oldsey = sel.ne.y;
1137 getbuttoninfo(e);
1138
1139 if(oldey != sel.oe.y || oldex != sel.oe.x)
1140 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1141 }
1142
1143 void
1144 die(const char *errstr, ...) {
1145 va_list ap;
1146
1147 va_start(ap, errstr);
1148 vfprintf(stderr, errstr, ap);
1149 va_end(ap);
1150 exit(EXIT_FAILURE);
1151 }
1152
1153 void
1154 execsh(void) {
1155 char **args;
1156 char *envshell = getenv("SHELL");
1157 const struct passwd *pass = getpwuid(getuid());
1158 char buf[sizeof(long) * 8 + 1];
1159
1160 unsetenv("COLUMNS");
1161 unsetenv("LINES");
1162 unsetenv("TERMCAP");
1163
1164 if(pass) {
1165 setenv("LOGNAME", pass->pw_name, 1);
1166 setenv("USER", pass->pw_name, 1);
1167 setenv("SHELL", pass->pw_shell, 0);
1168 setenv("HOME", pass->pw_dir, 0);
1169 }
1170
1171 snprintf(buf, sizeof(buf), "%lu", xw.win);
1172 setenv("WINDOWID", buf, 1);
1173
1174 signal(SIGCHLD, SIG_DFL);
1175 signal(SIGHUP, SIG_DFL);
1176 signal(SIGINT, SIG_DFL);
1177 signal(SIGQUIT, SIG_DFL);
1178 signal(SIGTERM, SIG_DFL);
1179 signal(SIGALRM, SIG_DFL);
1180
1181 DEFAULT(envshell, shell);
1182 setenv("TERM", termname, 1);
1183 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1184 execvp(args[0], args);
1185 exit(EXIT_FAILURE);
1186 }
1187
1188 void
1189 sigchld(int a) {
1190 int stat = 0;
1191
1192 if(waitpid(pid, &stat, 0) < 0)
1193 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1194
1195 if(WIFEXITED(stat)) {
1196 exit(WEXITSTATUS(stat));
1197 } else {
1198 exit(EXIT_FAILURE);
1199 }
1200 }
1201
1202 void
1203 ttynew(void) {
1204 int m, s;
1205 struct winsize w = {term.row, term.col, 0, 0};
1206
1207 /* seems to work fine on linux, openbsd and freebsd */
1208 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1209 die("openpty failed: %s\n", strerror(errno));
1210
1211 switch(pid = fork()) {
1212 case -1:
1213 die("fork failed\n");
1214 break;
1215 case 0:
1216 setsid(); /* create a new process group */
1217 dup2(s, STDIN_FILENO);
1218 dup2(s, STDOUT_FILENO);
1219 dup2(s, STDERR_FILENO);
1220 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1221 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1222 close(s);
1223 close(m);
1224 execsh();
1225 break;
1226 default:
1227 close(s);
1228 cmdfd = m;
1229 signal(SIGCHLD, sigchld);
1230 if(opt_io) {
1231 term.mode |= MODE_PRINT;
1232 iofd = (!strcmp(opt_io, "-")) ?
1233 STDOUT_FILENO :
1234 open(opt_io, O_WRONLY | O_CREAT, 0666);
1235 if(iofd < 0) {
1236 fprintf(stderr, "Error opening %s:%s\n",
1237 opt_io, strerror(errno));
1238 }
1239 }
1240 break;
1241 }
1242 }
1243
1244 void
1245 ttyread(void) {
1246 static char buf[BUFSIZ];
1247 static int buflen = 0;
1248 char *ptr;
1249 char s[UTF_SIZ];
1250 int charsize; /* size of utf8 char in bytes */
1251 long unicodep;
1252 int ret;
1253
1254 /* append read bytes to unprocessed bytes */
1255 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1256 die("Couldn't read from shell: %s\n", strerror(errno));
1257
1258 /* process every complete utf8 char */
1259 buflen += ret;
1260 ptr = buf;
1261 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1262 utf8encode(unicodep, s, UTF_SIZ);
1263 tputc(s, charsize);
1264 ptr += charsize;
1265 buflen -= charsize;
1266 }
1267
1268 /* keep any uncomplete utf8 char for the next call */
1269 memmove(buf, ptr, buflen);
1270 }
1271
1272 void
1273 ttywrite(const char *s, size_t n) {
1274 if(xwrite(cmdfd, s, n) == -1)
1275 die("write error on tty: %s\n", strerror(errno));
1276 }
1277
1278 void
1279 ttysend(char *s, size_t n) {
1280 ttywrite(s, n);
1281 if(IS_SET(MODE_ECHO))
1282 techo(s, n);
1283 }
1284
1285 void
1286 ttyresize(void) {
1287 struct winsize w;
1288
1289 w.ws_row = term.row;
1290 w.ws_col = term.col;
1291 w.ws_xpixel = xw.tw;
1292 w.ws_ypixel = xw.th;
1293 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1294 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1295 }
1296
1297 int
1298 tattrset(int attr) {
1299 int i, j;
1300
1301 for(i = 0; i < term.row-1; i++) {
1302 for(j = 0; j < term.col-1; j++) {
1303 if(term.line[i][j].mode & attr)
1304 return 1;
1305 }
1306 }
1307
1308 return 0;
1309 }
1310
1311 void
1312 tsetdirt(int top, int bot) {
1313 int i;
1314
1315 LIMIT(top, 0, term.row-1);
1316 LIMIT(bot, 0, term.row-1);
1317
1318 for(i = top; i <= bot; i++)
1319 term.dirty[i] = 1;
1320 }
1321
1322 void
1323 tsetdirtattr(int attr) {
1324 int i, j;
1325
1326 for(i = 0; i < term.row-1; i++) {
1327 for(j = 0; j < term.col-1; j++) {
1328 if(term.line[i][j].mode & attr) {
1329 tsetdirt(i, i);
1330 break;
1331 }
1332 }
1333 }
1334 }
1335
1336 void
1337 tfulldirt(void) {
1338 tsetdirt(0, term.row-1);
1339 }
1340
1341 void
1342 tcursor(int mode) {
1343 static TCursor c[2];
1344 bool alt = IS_SET(MODE_ALTSCREEN);
1345
1346 if(mode == CURSOR_SAVE) {
1347 c[alt] = term.c;
1348 } else if(mode == CURSOR_LOAD) {
1349 term.c = c[alt];
1350 tmoveto(c[alt].x, c[alt].y);
1351 }
1352 }
1353
1354 void
1355 treset(void) {
1356 uint i;
1357
1358 term.c = (TCursor){{
1359 .mode = ATTR_NULL,
1360 .fg = defaultfg,
1361 .bg = defaultbg
1362 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1363
1364 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1365 for(i = tabspaces; i < term.col; i += tabspaces)
1366 term.tabs[i] = 1;
1367 term.top = 0;
1368 term.bot = term.row - 1;
1369 term.mode = MODE_WRAP;
1370 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1371 term.charset = 0;
1372
1373 tclearregion(0, 0, term.col-1, term.row-1);
1374 tmoveto(0, 0);
1375 tcursor(CURSOR_SAVE);
1376 }
1377
1378 void
1379 tnew(int col, int row) {
1380 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1381 tresize(col, row);
1382 term.numlock = 1;
1383
1384 treset();
1385 }
1386
1387 void
1388 tswapscreen(void) {
1389 Line *tmp = term.line;
1390
1391 term.line = term.alt;
1392 term.alt = tmp;
1393 term.mode ^= MODE_ALTSCREEN;
1394 tfulldirt();
1395 }
1396
1397 void
1398 tscrolldown(int orig, int n) {
1399 int i;
1400 Line temp;
1401
1402 LIMIT(n, 0, term.bot-orig+1);
1403
1404 tsetdirt(orig, term.bot-n);
1405 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1406
1407 for(i = term.bot; i >= orig+n; i--) {
1408 temp = term.line[i];
1409 term.line[i] = term.line[i-n];
1410 term.line[i-n] = temp;
1411 }
1412
1413 selscroll(orig, n);
1414 }
1415
1416 void
1417 tscrollup(int orig, int n) {
1418 int i;
1419 Line temp;
1420
1421 LIMIT(n, 0, term.bot-orig+1);
1422
1423 tclearregion(0, orig, term.col-1, orig+n-1);
1424 tsetdirt(orig+n, term.bot);
1425
1426 for(i = orig; i <= term.bot-n; i++) {
1427 temp = term.line[i];
1428 term.line[i] = term.line[i+n];
1429 term.line[i+n] = temp;
1430 }
1431
1432 selscroll(orig, -n);
1433 }
1434
1435 void
1436 selscroll(int orig, int n) {
1437 if(sel.ob.x == -1)
1438 return;
1439
1440 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1441 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1442 selclear(NULL);
1443 return;
1444 }
1445 if(sel.type == SEL_RECTANGULAR) {
1446 if(sel.ob.y < term.top)
1447 sel.ob.y = term.top;
1448 if(sel.oe.y > term.bot)
1449 sel.oe.y = term.bot;
1450 } else {
1451 if(sel.ob.y < term.top) {
1452 sel.ob.y = term.top;
1453 sel.ob.x = 0;
1454 }
1455 if(sel.oe.y > term.bot) {
1456 sel.oe.y = term.bot;
1457 sel.oe.x = term.col;
1458 }
1459 }
1460 selsort();
1461 }
1462 }
1463
1464 void
1465 tnewline(int first_col) {
1466 int y = term.c.y;
1467
1468 if(y == term.bot) {
1469 tscrollup(term.top, 1);
1470 } else {
1471 y++;
1472 }
1473 tmoveto(first_col ? 0 : term.c.x, y);
1474 }
1475
1476 void
1477 csiparse(void) {
1478 char *p = csiescseq.buf, *np;
1479 long int v;
1480
1481 csiescseq.narg = 0;
1482 if(*p == '?') {
1483 csiescseq.priv = 1;
1484 p++;
1485 }
1486
1487 csiescseq.buf[csiescseq.len] = '\0';
1488 while(p < csiescseq.buf+csiescseq.len) {
1489 np = NULL;
1490 v = strtol(p, &np, 10);
1491 if(np == p)
1492 v = 0;
1493 if(v == LONG_MAX || v == LONG_MIN)
1494 v = -1;
1495 csiescseq.arg[csiescseq.narg++] = v;
1496 p = np;
1497 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1498 break;
1499 p++;
1500 }
1501 csiescseq.mode = *p;
1502 }
1503
1504 /* for absolute user moves, when decom is set */
1505 void
1506 tmoveato(int x, int y) {
1507 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1508 }
1509
1510 void
1511 tmoveto(int x, int y) {
1512 int miny, maxy;
1513
1514 if(term.c.state & CURSOR_ORIGIN) {
1515 miny = term.top;
1516 maxy = term.bot;
1517 } else {
1518 miny = 0;
1519 maxy = term.row - 1;
1520 }
1521 LIMIT(x, 0, term.col-1);
1522 LIMIT(y, miny, maxy);
1523 term.c.state &= ~CURSOR_WRAPNEXT;
1524 term.c.x = x;
1525 term.c.y = y;
1526 }
1527
1528 void
1529 tsetchar(char *c, Glyph *attr, int x, int y) {
1530 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1531 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1532 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1533 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1534 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1535 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1536 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1537 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1538 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1539 };
1540
1541 /*
1542 * The table is proudly stolen from rxvt.
1543 */
1544 if(attr->mode & ATTR_GFX) {
1545 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1546 c = vt100_0[c[0] - 0x41];
1547 }
1548 }
1549
1550 if(term.line[y][x].mode & ATTR_WIDE) {
1551 if(x+1 < term.col) {
1552 term.line[y][x+1].c[0] = ' ';
1553 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1554 }
1555 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1556 term.line[y][x-1].c[0] = ' ';
1557 term.line[y][x-1].mode &= ~ATTR_WIDE;
1558 }
1559
1560 term.dirty[y] = 1;
1561 term.line[y][x] = *attr;
1562 memcpy(term.line[y][x].c, c, UTF_SIZ);
1563 }
1564
1565 void
1566 tclearregion(int x1, int y1, int x2, int y2) {
1567 int x, y, temp;
1568
1569 if(x1 > x2)
1570 temp = x1, x1 = x2, x2 = temp;
1571 if(y1 > y2)
1572 temp = y1, y1 = y2, y2 = temp;
1573
1574 LIMIT(x1, 0, term.col-1);
1575 LIMIT(x2, 0, term.col-1);
1576 LIMIT(y1, 0, term.row-1);
1577 LIMIT(y2, 0, term.row-1);
1578
1579 for(y = y1; y <= y2; y++) {
1580 term.dirty[y] = 1;
1581 for(x = x1; x <= x2; x++) {
1582 if(selected(x, y))
1583 selclear(NULL);
1584 term.line[y][x] = term.c.attr;
1585 memcpy(term.line[y][x].c, " ", 2);
1586 }
1587 }
1588 }
1589
1590 void
1591 tdeletechar(int n) {
1592 int dst, src, size;
1593 Glyph *line;
1594
1595 LIMIT(n, 0, term.col - term.c.x);
1596
1597 dst = term.c.x;
1598 src = term.c.x + n;
1599 size = term.col - src;
1600 line = term.line[term.c.y];
1601
1602 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1603 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1604 }
1605
1606 void
1607 tinsertblank(int n) {
1608 int dst, src, size;
1609 Glyph *line;
1610
1611 LIMIT(n, 0, term.col - term.c.x);
1612
1613 dst = term.c.x + n;
1614 src = term.c.x;
1615 size = term.col - dst;
1616 line = term.line[term.c.y];
1617
1618 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1619 tclearregion(src, term.c.y, dst - 1, term.c.y);
1620 }
1621
1622 void
1623 tinsertblankline(int n) {
1624 if(BETWEEN(term.c.y, term.top, term.bot))
1625 tscrolldown(term.c.y, n);
1626 }
1627
1628 void
1629 tdeleteline(int n) {
1630 if(BETWEEN(term.c.y, term.top, term.bot))
1631 tscrollup(term.c.y, n);
1632 }
1633
1634 int32_t
1635 tdefcolor(int *attr, int *npar, int l) {
1636 int32_t idx = -1;
1637 uint r, g, b;
1638
1639 switch (attr[*npar + 1]) {
1640 case 2: /* direct colour in RGB space */
1641 if (*npar + 4 >= l) {
1642 fprintf(stderr,
1643 "erresc(38): Incorrect number of parameters (%d)\n",
1644 *npar);
1645 break;
1646 }
1647 r = attr[*npar + 2];
1648 g = attr[*npar + 3];
1649 b = attr[*npar + 4];
1650 *npar += 4;
1651 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1652 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1653 r, g, b);
1654 else
1655 idx = TRUECOLOR(r, g, b);
1656 break;
1657 case 5: /* indexed colour */
1658 if (*npar + 2 >= l) {
1659 fprintf(stderr,
1660 "erresc(38): Incorrect number of parameters (%d)\n",
1661 *npar);
1662 break;
1663 }
1664 *npar += 2;
1665 if(!BETWEEN(attr[*npar], 0, 255))
1666 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1667 else
1668 idx = attr[*npar];
1669 break;
1670 case 0: /* implemented defined (only foreground) */
1671 case 1: /* transparent */
1672 case 3: /* direct colour in CMY space */
1673 case 4: /* direct colour in CMYK space */
1674 default:
1675 fprintf(stderr,
1676 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1677 break;
1678 }
1679
1680 return idx;
1681 }
1682
1683 void
1684 tsetattr(int *attr, int l) {
1685 int i;
1686 int32_t idx;
1687
1688 for(i = 0; i < l; i++) {
1689 switch(attr[i]) {
1690 case 0:
1691 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1692 | ATTR_BOLD | ATTR_ITALIC \
1693 | ATTR_BLINK);
1694 term.c.attr.fg = defaultfg;
1695 term.c.attr.bg = defaultbg;
1696 break;
1697 case 1:
1698 term.c.attr.mode |= ATTR_BOLD;
1699 break;
1700 case 3:
1701 term.c.attr.mode |= ATTR_ITALIC;
1702 break;
1703 case 4:
1704 term.c.attr.mode |= ATTR_UNDERLINE;
1705 break;
1706 case 5: /* slow blink */
1707 case 6: /* rapid blink */
1708 term.c.attr.mode |= ATTR_BLINK;
1709 break;
1710 case 7:
1711 term.c.attr.mode |= ATTR_REVERSE;
1712 break;
1713 case 21:
1714 case 22:
1715 term.c.attr.mode &= ~ATTR_BOLD;
1716 break;
1717 case 23:
1718 term.c.attr.mode &= ~ATTR_ITALIC;
1719 break;
1720 case 24:
1721 term.c.attr.mode &= ~ATTR_UNDERLINE;
1722 break;
1723 case 25:
1724 case 26:
1725 term.c.attr.mode &= ~ATTR_BLINK;
1726 break;
1727 case 27:
1728 term.c.attr.mode &= ~ATTR_REVERSE;
1729 break;
1730 case 38:
1731 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1732 term.c.attr.fg = idx;
1733 break;
1734 case 39:
1735 term.c.attr.fg = defaultfg;
1736 break;
1737 case 48:
1738 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1739 term.c.attr.bg = idx;
1740 break;
1741 case 49:
1742 term.c.attr.bg = defaultbg;
1743 break;
1744 default:
1745 if(BETWEEN(attr[i], 30, 37)) {
1746 term.c.attr.fg = attr[i] - 30;
1747 } else if(BETWEEN(attr[i], 40, 47)) {
1748 term.c.attr.bg = attr[i] - 40;
1749 } else if(BETWEEN(attr[i], 90, 97)) {
1750 term.c.attr.fg = attr[i] - 90 + 8;
1751 } else if(BETWEEN(attr[i], 100, 107)) {
1752 term.c.attr.bg = attr[i] - 100 + 8;
1753 } else {
1754 fprintf(stderr,
1755 "erresc(default): gfx attr %d unknown\n",
1756 attr[i]), csidump();
1757 }
1758 break;
1759 }
1760 }
1761 }
1762
1763 void
1764 tsetscroll(int t, int b) {
1765 int temp;
1766
1767 LIMIT(t, 0, term.row-1);
1768 LIMIT(b, 0, term.row-1);
1769 if(t > b) {
1770 temp = t;
1771 t = b;
1772 b = temp;
1773 }
1774 term.top = t;
1775 term.bot = b;
1776 }
1777
1778 void
1779 tsetmode(bool priv, bool set, int *args, int narg) {
1780 int *lim, mode;
1781 bool alt;
1782
1783 for(lim = args + narg; args < lim; ++args) {
1784 if(priv) {
1785 switch(*args) {
1786 case 1: /* DECCKM -- Cursor key */
1787 MODBIT(term.mode, set, MODE_APPCURSOR);
1788 break;
1789 case 5: /* DECSCNM -- Reverse video */
1790 mode = term.mode;
1791 MODBIT(term.mode, set, MODE_REVERSE);
1792 if(mode != term.mode)
1793 redraw(REDRAW_TIMEOUT);
1794 break;
1795 case 6: /* DECOM -- Origin */
1796 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1797 tmoveato(0, 0);
1798 break;
1799 case 7: /* DECAWM -- Auto wrap */
1800 MODBIT(term.mode, set, MODE_WRAP);
1801 break;
1802 case 0: /* Error (IGNORED) */
1803 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1804 case 3: /* DECCOLM -- Column (IGNORED) */
1805 case 4: /* DECSCLM -- Scroll (IGNORED) */
1806 case 8: /* DECARM -- Auto repeat (IGNORED) */
1807 case 18: /* DECPFF -- Printer feed (IGNORED) */
1808 case 19: /* DECPEX -- Printer extent (IGNORED) */
1809 case 42: /* DECNRCM -- National characters (IGNORED) */
1810 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1811 break;
1812 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1813 MODBIT(term.mode, !set, MODE_HIDE);
1814 break;
1815 case 9: /* X10 mouse compatibility mode */
1816 xsetpointermotion(0);
1817 MODBIT(term.mode, 0, MODE_MOUSE);
1818 MODBIT(term.mode, set, MODE_MOUSEX10);
1819 break;
1820 case 1000: /* 1000: report button press */
1821 xsetpointermotion(0);
1822 MODBIT(term.mode, 0, MODE_MOUSE);
1823 MODBIT(term.mode, set, MODE_MOUSEBTN);
1824 break;
1825 case 1002: /* 1002: report motion on button press */
1826 xsetpointermotion(0);
1827 MODBIT(term.mode, 0, MODE_MOUSE);
1828 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1829 break;
1830 case 1003: /* 1003: enable all mouse motions */
1831 xsetpointermotion(set);
1832 MODBIT(term.mode, 0, MODE_MOUSE);
1833 MODBIT(term.mode, set, MODE_MOUSEMANY);
1834 break;
1835 case 1004: /* 1004: send focus events to tty */
1836 MODBIT(term.mode, set, MODE_FOCUS);
1837 break;
1838 case 1006: /* 1006: extended reporting mode */
1839 MODBIT(term.mode, set, MODE_MOUSESGR);
1840 break;
1841 case 1034:
1842 MODBIT(term.mode, set, MODE_8BIT);
1843 break;
1844 case 1049: /* swap screen & set/restore cursor as xterm */
1845 if (!allowaltscreen)
1846 break;
1847 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1848 /* FALLTHRU */
1849 case 47: /* swap screen */
1850 case 1047:
1851 if (!allowaltscreen)
1852 break;
1853 alt = IS_SET(MODE_ALTSCREEN);
1854 if(alt) {
1855 tclearregion(0, 0, term.col-1,
1856 term.row-1);
1857 }
1858 if(set ^ alt) /* set is always 1 or 0 */
1859 tswapscreen();
1860 if(*args != 1049)
1861 break;
1862 /* FALLTRU */
1863 case 1048:
1864 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1865 break;
1866 case 2004: /* 2004: bracketed paste mode */
1867 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1868 break;
1869 /* Not implemented mouse modes. See comments there. */
1870 case 1001: /* mouse highlight mode; can hang the
1871 terminal by design when implemented. */
1872 case 1005: /* UTF-8 mouse mode; will confuse
1873 applications not supporting UTF-8
1874 and luit. */
1875 case 1015: /* urxvt mangled mouse mode; incompatible
1876 and can be mistaken for other control
1877 codes. */
1878 default:
1879 fprintf(stderr,
1880 "erresc: unknown private set/reset mode %d\n",
1881 *args);
1882 break;
1883 }
1884 } else {
1885 switch(*args) {
1886 case 0: /* Error (IGNORED) */
1887 break;
1888 case 2: /* KAM -- keyboard action */
1889 MODBIT(term.mode, set, MODE_KBDLOCK);
1890 break;
1891 case 4: /* IRM -- Insertion-replacement */
1892 MODBIT(term.mode, set, MODE_INSERT);
1893 break;
1894 case 12: /* SRM -- Send/Receive */
1895 MODBIT(term.mode, !set, MODE_ECHO);
1896 break;
1897 case 20: /* LNM -- Linefeed/new line */
1898 MODBIT(term.mode, set, MODE_CRLF);
1899 break;
1900 default:
1901 fprintf(stderr,
1902 "erresc: unknown set/reset mode %d\n",
1903 *args);
1904 break;
1905 }
1906 }
1907 }
1908 }
1909
1910 void
1911 csihandle(void) {
1912 char buf[40];
1913 int len;
1914
1915 switch(csiescseq.mode) {
1916 default:
1917 unknown:
1918 fprintf(stderr, "erresc: unknown csi ");
1919 csidump();
1920 /* die(""); */
1921 break;
1922 case '@': /* ICH -- Insert <n> blank char */
1923 DEFAULT(csiescseq.arg[0], 1);
1924 tinsertblank(csiescseq.arg[0]);
1925 break;
1926 case 'A': /* CUU -- Cursor <n> Up */
1927 DEFAULT(csiescseq.arg[0], 1);
1928 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1929 break;
1930 case 'B': /* CUD -- Cursor <n> Down */
1931 case 'e': /* VPR --Cursor <n> Down */
1932 DEFAULT(csiescseq.arg[0], 1);
1933 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1934 break;
1935 case 'i': /* MC -- Media Copy */
1936 switch(csiescseq.arg[0]) {
1937 case 0:
1938 tdump();
1939 break;
1940 case 1:
1941 tdumpline(term.c.y);
1942 break;
1943 case 2:
1944 tdumpsel();
1945 break;
1946 case 4:
1947 term.mode &= ~MODE_PRINT;
1948 break;
1949 case 5:
1950 term.mode |= MODE_PRINT;
1951 break;
1952 }
1953 break;
1954 case 'c': /* DA -- Device Attributes */
1955 if(csiescseq.arg[0] == 0)
1956 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1957 break;
1958 case 'C': /* CUF -- Cursor <n> Forward */
1959 case 'a': /* HPR -- Cursor <n> Forward */
1960 DEFAULT(csiescseq.arg[0], 1);
1961 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1962 break;
1963 case 'D': /* CUB -- Cursor <n> Backward */
1964 DEFAULT(csiescseq.arg[0], 1);
1965 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1966 break;
1967 case 'E': /* CNL -- Cursor <n> Down and first col */
1968 DEFAULT(csiescseq.arg[0], 1);
1969 tmoveto(0, term.c.y+csiescseq.arg[0]);
1970 break;
1971 case 'F': /* CPL -- Cursor <n> Up and first col */
1972 DEFAULT(csiescseq.arg[0], 1);
1973 tmoveto(0, term.c.y-csiescseq.arg[0]);
1974 break;
1975 case 'g': /* TBC -- Tabulation clear */
1976 switch(csiescseq.arg[0]) {
1977 case 0: /* clear current tab stop */
1978 term.tabs[term.c.x] = 0;
1979 break;
1980 case 3: /* clear all the tabs */
1981 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1982 break;
1983 default:
1984 goto unknown;
1985 }
1986 break;
1987 case 'G': /* CHA -- Move to <col> */
1988 case '`': /* HPA */
1989 DEFAULT(csiescseq.arg[0], 1);
1990 tmoveto(csiescseq.arg[0]-1, term.c.y);
1991 break;
1992 case 'H': /* CUP -- Move to <row> <col> */
1993 case 'f': /* HVP */
1994 DEFAULT(csiescseq.arg[0], 1);
1995 DEFAULT(csiescseq.arg[1], 1);
1996 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1997 break;
1998 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1999 DEFAULT(csiescseq.arg[0], 1);
2000 tputtab(csiescseq.arg[0]);
2001 break;
2002 case 'J': /* ED -- Clear screen */
2003 selclear(NULL);
2004 switch(csiescseq.arg[0]) {
2005 case 0: /* below */
2006 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2007 if(term.c.y < term.row-1) {
2008 tclearregion(0, term.c.y+1, term.col-1,
2009 term.row-1);
2010 }
2011 break;
2012 case 1: /* above */
2013 if(term.c.y > 1)
2014 tclearregion(0, 0, term.col-1, term.c.y-1);
2015 tclearregion(0, term.c.y, term.c.x, term.c.y);
2016 break;
2017 case 2: /* all */
2018 tclearregion(0, 0, term.col-1, term.row-1);
2019 break;
2020 default:
2021 goto unknown;
2022 }
2023 break;
2024 case 'K': /* EL -- Clear line */
2025 switch(csiescseq.arg[0]) {
2026 case 0: /* right */
2027 tclearregion(term.c.x, term.c.y, term.col-1,
2028 term.c.y);
2029 break;
2030 case 1: /* left */
2031 tclearregion(0, term.c.y, term.c.x, term.c.y);
2032 break;
2033 case 2: /* all */
2034 tclearregion(0, term.c.y, term.col-1, term.c.y);
2035 break;
2036 }
2037 break;
2038 case 'S': /* SU -- Scroll <n> line up */
2039 DEFAULT(csiescseq.arg[0], 1);
2040 tscrollup(term.top, csiescseq.arg[0]);
2041 break;
2042 case 'T': /* SD -- Scroll <n> line down */
2043 DEFAULT(csiescseq.arg[0], 1);
2044 tscrolldown(term.top, csiescseq.arg[0]);
2045 break;
2046 case 'L': /* IL -- Insert <n> blank lines */
2047 DEFAULT(csiescseq.arg[0], 1);
2048 tinsertblankline(csiescseq.arg[0]);
2049 break;
2050 case 'l': /* RM -- Reset Mode */
2051 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2052 break;
2053 case 'M': /* DL -- Delete <n> lines */
2054 DEFAULT(csiescseq.arg[0], 1);
2055 tdeleteline(csiescseq.arg[0]);
2056 break;
2057 case 'X': /* ECH -- Erase <n> char */
2058 DEFAULT(csiescseq.arg[0], 1);
2059 tclearregion(term.c.x, term.c.y,
2060 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2061 break;
2062 case 'P': /* DCH -- Delete <n> char */
2063 DEFAULT(csiescseq.arg[0], 1);
2064 tdeletechar(csiescseq.arg[0]);
2065 break;
2066 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2067 DEFAULT(csiescseq.arg[0], 1);
2068 tputtab(-csiescseq.arg[0]);
2069 break;
2070 case 'd': /* VPA -- Move to <row> */
2071 DEFAULT(csiescseq.arg[0], 1);
2072 tmoveato(term.c.x, csiescseq.arg[0]-1);
2073 break;
2074 case 'h': /* SM -- Set terminal mode */
2075 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2076 break;
2077 case 'm': /* SGR -- Terminal attribute (color) */
2078 tsetattr(csiescseq.arg, csiescseq.narg);
2079 break;
2080 case 'n': /* DSR – Device Status Report (cursor position) */
2081 if (csiescseq.arg[0] == 6) {
2082 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2083 term.c.y+1, term.c.x+1);
2084 ttywrite(buf, len);
2085 }
2086 break;
2087 case 'r': /* DECSTBM -- Set Scrolling Region */
2088 if(csiescseq.priv) {
2089 goto unknown;
2090 } else {
2091 DEFAULT(csiescseq.arg[0], 1);
2092 DEFAULT(csiescseq.arg[1], term.row);
2093 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2094 tmoveato(0, 0);
2095 }
2096 break;
2097 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2098 tcursor(CURSOR_SAVE);
2099 break;
2100 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2101 tcursor(CURSOR_LOAD);
2102 break;
2103 }
2104 }
2105
2106 void
2107 csidump(void) {
2108 int i;
2109 uint c;
2110
2111 printf("ESC[");
2112 for(i = 0; i < csiescseq.len; i++) {
2113 c = csiescseq.buf[i] & 0xff;
2114 if(isprint(c)) {
2115 putchar(c);
2116 } else if(c == '\n') {
2117 printf("(\\n)");
2118 } else if(c == '\r') {
2119 printf("(\\r)");
2120 } else if(c == 0x1b) {
2121 printf("(\\e)");
2122 } else {
2123 printf("(%02x)", c);
2124 }
2125 }
2126 putchar('\n');
2127 }
2128
2129 void
2130 csireset(void) {
2131 memset(&csiescseq, 0, sizeof(csiescseq));
2132 }
2133
2134 void
2135 strhandle(void) {
2136 char *p = NULL;
2137 int j, narg, par;
2138
2139 term.esc &= ~(ESC_STR_END|ESC_STR);
2140 strparse();
2141 narg = strescseq.narg;
2142 par = atoi(strescseq.args[0]);
2143
2144 switch(strescseq.type) {
2145 case ']': /* OSC -- Operating System Command */
2146 switch(par) {
2147 case 0:
2148 case 1:
2149 case 2:
2150 if(narg > 1)
2151 xsettitle(strescseq.args[1]);
2152 return;
2153 case 4: /* color set */
2154 if(narg < 3)
2155 break;
2156 p = strescseq.args[2];
2157 /* fall through */
2158 case 104: /* color reset, here p = NULL */
2159 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2160 if (!xsetcolorname(j, p)) {
2161 fprintf(stderr, "erresc: invalid color %s\n", p);
2162 } else {
2163 /*
2164 * TODO if defaultbg color is changed, borders
2165 * are dirty
2166 */
2167 redraw(0);
2168 }
2169 return;
2170 }
2171 break;
2172 case 'k': /* old title set compatibility */
2173 xsettitle(strescseq.args[0]);
2174 return;
2175 case 'P': /* DCS -- Device Control String */
2176 case '_': /* APC -- Application Program Command */
2177 case '^': /* PM -- Privacy Message */
2178 return;
2179 }
2180
2181 fprintf(stderr, "erresc: unknown str ");
2182 strdump();
2183 }
2184
2185 void
2186 strparse(void) {
2187 char *p = strescseq.buf;
2188
2189 strescseq.narg = 0;
2190 strescseq.buf[strescseq.len] = '\0';
2191 while(p && strescseq.narg < STR_ARG_SIZ)
2192 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2193 }
2194
2195 void
2196 strdump(void) {
2197 int i;
2198 uint c;
2199
2200 printf("ESC%c", strescseq.type);
2201 for(i = 0; i < strescseq.len; i++) {
2202 c = strescseq.buf[i] & 0xff;
2203 if(c == '\0') {
2204 return;
2205 } else if(isprint(c)) {
2206 putchar(c);
2207 } else if(c == '\n') {
2208 printf("(\\n)");
2209 } else if(c == '\r') {
2210 printf("(\\r)");
2211 } else if(c == 0x1b) {
2212 printf("(\\e)");
2213 } else {
2214 printf("(%02x)", c);
2215 }
2216 }
2217 printf("ESC\\\n");
2218 }
2219
2220 void
2221 strreset(void) {
2222 memset(&strescseq, 0, sizeof(strescseq));
2223 }
2224
2225 void
2226 tprinter(char *s, size_t len) {
2227 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2228 fprintf(stderr, "Error writing in %s:%s\n",
2229 opt_io, strerror(errno));
2230 close(iofd);
2231 iofd = -1;
2232 }
2233 }
2234
2235 void
2236 toggleprinter(const Arg *arg) {
2237 term.mode ^= MODE_PRINT;
2238 }
2239
2240 void
2241 printscreen(const Arg *arg) {
2242 tdump();
2243 }
2244
2245 void
2246 printsel(const Arg *arg) {
2247 tdumpsel();
2248 }
2249
2250 void
2251 tdumpsel(void) {
2252 char *ptr;
2253
2254 if((ptr = getsel())) {
2255 tprinter(ptr, strlen(ptr));
2256 free(ptr);
2257 }
2258 }
2259
2260 void
2261 tdumpline(int n) {
2262 Glyph *bp, *end;
2263
2264 bp = &term.line[n][0];
2265 end = &bp[term.col-1];
2266 while(end > bp && !strcmp(" ", end->c))
2267 --end;
2268 if(bp != end || strcmp(bp->c, " ")) {
2269 for( ;bp <= end; ++bp)
2270 tprinter(bp->c, strlen(bp->c));
2271 }
2272 tprinter("\n", 1);
2273 }
2274
2275 void
2276 tdump(void) {
2277 int i;
2278
2279 for(i = 0; i < term.row; ++i)
2280 tdumpline(i);
2281 }
2282
2283 void
2284 tputtab(int n) {
2285 uint x = term.c.x;
2286
2287 if(n > 0) {
2288 while(x < term.col && n--)
2289 for(++x; x < term.col && !term.tabs[x]; ++x)
2290 /* nothing */ ;
2291 } else if(n < 0) {
2292 while(x > 0 && n++)
2293 for(--x; x > 0 && !term.tabs[x]; --x)
2294 /* nothing */ ;
2295 }
2296 tmoveto(x, term.c.y);
2297 }
2298
2299 void
2300 techo(char *buf, int len) {
2301 for(; len > 0; buf++, len--) {
2302 char c = *buf;
2303
2304 if(ISCONTROL(c)) { /* control code */
2305 if(c & 0x80) {
2306 c &= 0x7f;
2307 tputc("^", 1);
2308 tputc("[", 1);
2309 } else if(c != '\n' && c != '\r' && c != '\t') {
2310 c ^= '\x40';
2311 tputc("^", 1);
2312 }
2313 tputc(&c, 1);
2314 } else {
2315 break;
2316 }
2317 }
2318 if(len)
2319 tputc(buf, len);
2320 }
2321
2322 void
2323 tdeftran(char ascii) {
2324 char c, (*bp)[2];
2325 static char tbl[][2] = {
2326 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2327 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2328 {'5', CS_FIN}, {'C', CS_FIN},
2329 {0, 0}
2330 };
2331
2332 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2333 /* nothing */;
2334
2335 if (c == 0)
2336 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2337 else
2338 term.trantbl[term.icharset] = (*bp)[1];
2339 }
2340
2341 void
2342 tselcs(void) {
2343 MODBIT(term.c.attr.mode,
2344 term.trantbl[term.charset] == CS_GRAPHIC0,
2345 ATTR_GFX);
2346 }
2347
2348 bool
2349 tcontrolcode(uchar ascii) {
2350 static char question[UTF_SIZ] = "?";
2351
2352 switch(ascii) {
2353 case '\t': /* HT */
2354 tputtab(1);
2355 break;
2356 case '\b': /* BS */
2357 tmoveto(term.c.x-1, term.c.y);
2358 break;
2359 case '\r': /* CR */
2360 tmoveto(0, term.c.y);
2361 break;
2362 case '\f': /* LF */
2363 case '\v': /* VT */
2364 case '\n': /* LF */
2365 /* go to first col if the mode is set */
2366 tnewline(IS_SET(MODE_CRLF));
2367 break;
2368 case '\a': /* BEL */
2369 if(term.esc & ESC_STR_END) {
2370 /* backwards compatibility to xterm */
2371 strhandle();
2372 } else {
2373 if(!(xw.state & WIN_FOCUSED))
2374 xseturgency(1);
2375 if (bellvolume)
2376 XBell(xw.dpy, bellvolume);
2377 }
2378 break;
2379 case '\033': /* ESC */
2380 csireset();
2381 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2382 term.esc |= ESC_START;
2383 return 1;
2384 case '\016': /* SO */
2385 term.charset = 0;
2386 tselcs();
2387 break;
2388 case '\017': /* SI */
2389 term.charset = 1;
2390 tselcs();
2391 break;
2392 case '\032': /* SUB */
2393 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2394 case '\030': /* CAN */
2395 csireset();
2396 break;
2397 case '\005': /* ENQ (IGNORED) */
2398 case '\000': /* NUL (IGNORED) */
2399 case '\021': /* XON (IGNORED) */
2400 case '\023': /* XOFF (IGNORED) */
2401 case 0177: /* DEL (IGNORED) */
2402 case 0x84: /* TODO: IND */
2403 case 0x85: /* TODO: NEL */
2404 case 0x88: /* TODO: HTS */
2405 case 0x8d: /* TODO: RI */
2406 case 0x8e: /* TODO: SS2 */
2407 case 0x8f: /* TODO: SS3 */
2408 case 0x90: /* TODO: DCS */
2409 case 0x98: /* TODO: SOS */
2410 case 0x9a: /* TODO: DECID */
2411 case 0x9b: /* TODO: CSI */
2412 case 0x9c: /* TODO: ST */
2413 case 0x9d: /* TODO: OSC */
2414 case 0x9e: /* TODO: PM */
2415 case 0x9f: /* TODO: APC */
2416 break;
2417 default:
2418 return 0;
2419 }
2420 term.esc &= ~(ESC_STR_END|ESC_STR);
2421 return 1;
2422 }
2423
2424 void
2425 tdectest(char c) {
2426 static char E[UTF_SIZ] = "E";
2427 int x, y;
2428
2429 if(c == '8') { /* DEC screen alignment test. */
2430 for(x = 0; x < term.col; ++x) {
2431 for(y = 0; y < term.row; ++y)
2432 tsetchar(E, &term.c.attr, x, y);
2433 }
2434 }
2435 }
2436
2437 void
2438 tputc(char *c, int len) {
2439 uchar ascii;
2440 bool control;
2441 long unicodep;
2442 int width;
2443 Glyph *gp;
2444
2445 if(len == 1) {
2446 width = 1;
2447 unicodep = ascii = *c;
2448 } else {
2449 utf8decode(c, &unicodep, UTF_SIZ);
2450 width = wcwidth(unicodep);
2451 control = ISCONTROLC1(unicodep);
2452 ascii = unicodep;
2453 }
2454
2455 if(IS_SET(MODE_PRINT))
2456 tprinter(c, len);
2457 control = ISCONTROL(unicodep);
2458
2459 /*
2460 * STR sequence must be checked before anything else
2461 * because it uses all following characters until it
2462 * receives a ESC, a SUB, a ST or any other C1 control
2463 * character.
2464 */
2465 if(term.esc & ESC_STR) {
2466 if(width == 1 &&
2467 (ascii == '\a' || ascii == 030 ||
2468 ascii == 032 || ascii == 033 ||
2469 ISCONTROLC1(unicodep))) {
2470 term.esc &= ~ESC_STR;
2471 term.esc |= ESC_STR_END;
2472 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2473 memmove(&strescseq.buf[strescseq.len], c, len);
2474 strescseq.len += len;
2475 return;
2476 } else {
2477 /*
2478 * Here is a bug in terminals. If the user never sends
2479 * some code to stop the str or esc command, then st
2480 * will stop responding. But this is better than
2481 * silently failing with unknown characters. At least
2482 * then users will report back.
2483 *
2484 * In the case users ever get fixed, here is the code:
2485 */
2486 /*
2487 * term.esc = 0;
2488 * strhandle();
2489 */
2490 return;
2491 }
2492 }
2493
2494 /*
2495 * Actions of control codes must be performed as soon they arrive
2496 * because they can be embedded inside a control sequence, and
2497 * they must not cause conflicts with sequences.
2498 */
2499 if(control) {
2500 if (tcontrolcode(ascii))
2501 return;
2502 } else if(term.esc & ESC_START) {
2503 if(term.esc & ESC_CSI) {
2504 csiescseq.buf[csiescseq.len++] = ascii;
2505 if(BETWEEN(ascii, 0x40, 0x7E)
2506 || csiescseq.len >= \
2507 sizeof(csiescseq.buf)-1) {
2508 term.esc = 0;
2509 csiparse();
2510 csihandle();
2511 }
2512 return;
2513 } else if(term.esc & ESC_ALTCHARSET) {
2514 tdeftran(ascii);
2515 tselcs();
2516 } else if(term.esc & ESC_TEST) {
2517 tdectest(ascii);
2518 } else {
2519 switch(ascii) {
2520 case '[':
2521 term.esc |= ESC_CSI;
2522 return;
2523 case '#':
2524 term.esc |= ESC_TEST;
2525 return;
2526 case 'P': /* DCS -- Device Control String */
2527 case '_': /* APC -- Application Program Command */
2528 case '^': /* PM -- Privacy Message */
2529 case ']': /* OSC -- Operating System Command */
2530 case 'k': /* old title set compatibility */
2531 strreset();
2532 strescseq.type = ascii;
2533 term.esc |= ESC_STR;
2534 return;
2535 case '(': /* set primary charset G0 */
2536 case ')': /* set secondary charset G1 */
2537 case '*': /* set tertiary charset G2 */
2538 case '+': /* set quaternary charset G3 */
2539 term.icharset = ascii - '(';
2540 term.esc |= ESC_ALTCHARSET;
2541 return;
2542 case 'D': /* IND -- Linefeed */
2543 if(term.c.y == term.bot) {
2544 tscrollup(term.top, 1);
2545 } else {
2546 tmoveto(term.c.x, term.c.y+1);
2547 }
2548 break;
2549 case 'E': /* NEL -- Next line */
2550 tnewline(1); /* always go to first col */
2551 break;
2552 case 'H': /* HTS -- Horizontal tab stop */
2553 term.tabs[term.c.x] = 1;
2554 break;
2555 case 'M': /* RI -- Reverse index */
2556 if(term.c.y == term.top) {
2557 tscrolldown(term.top, 1);
2558 } else {
2559 tmoveto(term.c.x, term.c.y-1);
2560 }
2561 break;
2562 case 'Z': /* DECID -- Identify Terminal */
2563 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2564 break;
2565 case 'c': /* RIS -- Reset to inital state */
2566 treset();
2567 xresettitle();
2568 xloadcols();
2569 break;
2570 case '=': /* DECPAM -- Application keypad */
2571 term.mode |= MODE_APPKEYPAD;
2572 break;
2573 case '>': /* DECPNM -- Normal keypad */
2574 term.mode &= ~MODE_APPKEYPAD;
2575 break;
2576 case '7': /* DECSC -- Save Cursor */
2577 tcursor(CURSOR_SAVE);
2578 break;
2579 case '8': /* DECRC -- Restore Cursor */
2580 tcursor(CURSOR_LOAD);
2581 break;
2582 case '\\': /* ST -- String Terminator */
2583 if(term.esc & ESC_STR_END)
2584 strhandle();
2585 break;
2586 default:
2587 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2588 (uchar) ascii, isprint(ascii)? ascii:'.');
2589 break;
2590 }
2591 }
2592 term.esc = 0;
2593 /*
2594 * All characters which form part of a sequence are not
2595 * printed
2596 */
2597 return;
2598 }
2599 /*
2600 * Display control codes only if we are in graphic mode
2601 */
2602 if(control && !(term.c.attr.mode & ATTR_GFX))
2603 return;
2604 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2605 selclear(NULL);
2606
2607 gp = &term.line[term.c.y][term.c.x];
2608 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2609 gp->mode |= ATTR_WRAP;
2610 tnewline(1);
2611 }
2612
2613 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
2614 memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
2615
2616 if(term.c.x+width > term.col)
2617 tnewline(1);
2618
2619 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2620
2621 if(width == 2) {
2622 gp->mode |= ATTR_WIDE;
2623 if(term.c.x+1 < term.col) {
2624 gp[1].c[0] = '\0';
2625 gp[1].mode = ATTR_WDUMMY;
2626 }
2627 }
2628 if(term.c.x+width < term.col) {
2629 tmoveto(term.c.x+width, term.c.y);
2630 } else {
2631 term.c.state |= CURSOR_WRAPNEXT;
2632 }
2633 }
2634
2635 int
2636 tresize(int col, int row) {
2637 int i;
2638 int minrow = MIN(row, term.row);
2639 int mincol = MIN(col, term.col);
2640 int slide = term.c.y - row + 1;
2641 bool *bp;
2642 Line *orig;
2643
2644 if(col < 1 || row < 1)
2645 return 0;
2646
2647 /* free unneeded rows */
2648 i = 0;
2649 if(slide > 0) {
2650 /*
2651 * slide screen to keep cursor where we expect it -
2652 * tscrollup would work here, but we can optimize to
2653 * memmove because we're freeing the earlier lines
2654 */
2655 for(/* i = 0 */; i < slide; i++) {
2656 free(term.line[i]);
2657 free(term.alt[i]);
2658 }
2659 memmove(term.line, term.line + slide, row * sizeof(Line));
2660 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2661 }
2662 for(i += row; i < term.row; i++) {
2663 free(term.line[i]);
2664 free(term.alt[i]);
2665 }
2666
2667 /* resize to new height */
2668 term.line = xrealloc(term.line, row * sizeof(Line));
2669 term.alt = xrealloc(term.alt, row * sizeof(Line));
2670 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2671 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2672
2673 /* resize each row to new width, zero-pad if needed */
2674 for(i = 0; i < minrow; i++) {
2675 term.dirty[i] = 1;
2676 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2677 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2678 }
2679
2680 /* allocate any new rows */
2681 for(/* i == minrow */; i < row; i++) {
2682 term.dirty[i] = 1;
2683 term.line[i] = xmalloc(col * sizeof(Glyph));
2684 term.alt[i] = xmalloc(col * sizeof(Glyph));
2685 }
2686 if(col > term.col) {
2687 bp = term.tabs + term.col;
2688
2689 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2690 while(--bp > term.tabs && !*bp)
2691 /* nothing */ ;
2692 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2693 *bp = 1;
2694 }
2695 /* update terminal size */
2696 term.col = col;
2697 term.row = row;
2698 /* reset scrolling region */
2699 tsetscroll(0, row-1);
2700 /* make use of the LIMIT in tmoveto */
2701 tmoveto(term.c.x, term.c.y);
2702 /* Clearing both screens */
2703 orig = term.line;
2704 do {
2705 if(mincol < col && 0 < minrow) {
2706 tclearregion(mincol, 0, col - 1, minrow - 1);
2707 }
2708 if(0 < col && minrow < row) {
2709 tclearregion(0, minrow, col - 1, row - 1);
2710 }
2711 tcursor(CURSOR_SAVE);
2712 tswapscreen();
2713 tcursor(CURSOR_LOAD);
2714 } while(orig != term.line);
2715
2716 return (slide > 0);
2717 }
2718
2719 void
2720 xresize(int col, int row) {
2721 xw.tw = MAX(1, col * xw.cw);
2722 xw.th = MAX(1, row * xw.ch);
2723
2724 XFreePixmap(xw.dpy, xw.buf);
2725 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2726 DefaultDepth(xw.dpy, xw.scr));
2727 XftDrawChange(xw.draw, xw.buf);
2728 xclear(0, 0, xw.w, xw.h);
2729 }
2730
2731 static inline ushort
2732 sixd_to_16bit(int x) {
2733 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2734 }
2735
2736 void
2737 xloadcols(void) {
2738 int i, r, g, b;
2739 XRenderColor color = { .alpha = 0xffff };
2740 static bool loaded;
2741 Colour *cp;
2742
2743 if(loaded) {
2744 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2745 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2746 }
2747
2748 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2749 for(i = 0; i < LEN(colorname); i++) {
2750 if(!colorname[i])
2751 continue;
2752 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2753 die("Could not allocate color '%s'\n", colorname[i]);
2754 }
2755 }
2756
2757 /* load colors [16-255] ; same colors as xterm */
2758 for(i = 16, r = 0; r < 6; r++) {
2759 for(g = 0; g < 6; g++) {
2760 for(b = 0; b < 6; b++) {
2761 color.red = sixd_to_16bit(r);
2762 color.green = sixd_to_16bit(g);
2763 color.blue = sixd_to_16bit(b);
2764 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2765 die("Could not allocate color %d\n", i);
2766 }
2767 i++;
2768 }
2769 }
2770 }
2771
2772 for(r = 0; r < 24; r++, i++) {
2773 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2774 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2775 &dc.col[i])) {
2776 die("Could not allocate color %d\n", i);
2777 }
2778 }
2779 loaded = true;
2780 }
2781
2782 int
2783 xsetcolorname(int x, const char *name) {
2784 XRenderColor color = { .alpha = 0xffff };
2785 Colour colour;
2786 if(!BETWEEN(x, 0, LEN(colorname)))
2787 return -1;
2788 if(!name) {
2789 if(BETWEEN(x, 16, 16 + 215)) {
2790 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2791 color.red = sixd_to_16bit(r);
2792 color.green = sixd_to_16bit(g);
2793 color.blue = sixd_to_16bit(b);
2794 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2795 return 0; /* something went wrong */
2796 dc.col[x] = colour;
2797 return 1;
2798 } else if(BETWEEN(x, 16 + 216, 255)) {
2799 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2800 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2801 return 0; /* something went wrong */
2802 dc.col[x] = colour;
2803 return 1;
2804 } else {
2805 name = colorname[x];
2806 }
2807 }
2808 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2809 return 0;
2810 dc.col[x] = colour;
2811 return 1;
2812 }
2813
2814 void
2815 xtermclear(int col1, int row1, int col2, int row2) {
2816 XftDrawRect(xw.draw,
2817 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2818 borderpx + col1 * xw.cw,
2819 borderpx + row1 * xw.ch,
2820 (col2-col1+1) * xw.cw,
2821 (row2-row1+1) * xw.ch);
2822 }
2823
2824 /*
2825 * Absolute coordinates.
2826 */
2827 void
2828 xclear(int x1, int y1, int x2, int y2) {
2829 XftDrawRect(xw.draw,
2830 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2831 x1, y1, x2-x1, y2-y1);
2832 }
2833
2834 void
2835 xhints(void) {
2836 XClassHint class = {opt_class ? opt_class : termname, termname};
2837 XWMHints wm = {.flags = InputHint, .input = 1};
2838 XSizeHints *sizeh = NULL;
2839
2840 sizeh = XAllocSizeHints();
2841
2842 sizeh->flags = PSize | PResizeInc | PBaseSize;
2843 sizeh->height = xw.h;
2844 sizeh->width = xw.w;
2845 sizeh->height_inc = xw.ch;
2846 sizeh->width_inc = xw.cw;
2847 sizeh->base_height = 2 * borderpx;
2848 sizeh->base_width = 2 * borderpx;
2849 if(xw.isfixed == True) {
2850 sizeh->flags |= PMaxSize | PMinSize;
2851 sizeh->min_width = sizeh->max_width = xw.w;
2852 sizeh->min_height = sizeh->max_height = xw.h;
2853 }
2854 if(xw.gm & (XValue|YValue)) {
2855 sizeh->flags |= USPosition | PWinGravity;
2856 sizeh->x = xw.l;
2857 sizeh->y = xw.t;
2858 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2859 }
2860
2861 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2862 &class);
2863 XFree(sizeh);
2864 }
2865
2866 int
2867 xgeommasktogravity(int mask) {
2868 switch(mask & (XNegative|YNegative)) {
2869 case 0:
2870 return NorthWestGravity;
2871 case XNegative:
2872 return NorthEastGravity;
2873 case YNegative:
2874 return SouthWestGravity;
2875 }
2876 return SouthEastGravity;
2877 }
2878
2879 int
2880 xloadfont(Font *f, FcPattern *pattern) {
2881 FcPattern *match;
2882 FcResult result;
2883
2884 match = FcFontMatch(NULL, pattern, &result);
2885 if(!match)
2886 return 1;
2887
2888 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2889 FcPatternDestroy(match);
2890 return 1;
2891 }
2892
2893 f->set = NULL;
2894 f->pattern = FcPatternDuplicate(pattern);
2895
2896 f->ascent = f->match->ascent;
2897 f->descent = f->match->descent;
2898 f->lbearing = 0;
2899 f->rbearing = f->match->max_advance_width;
2900
2901 f->height = f->ascent + f->descent;
2902 f->width = f->lbearing + f->rbearing;
2903
2904 return 0;
2905 }
2906
2907 void
2908 xloadfonts(char *fontstr, double fontsize) {
2909 FcPattern *pattern;
2910 FcResult r_sz, r_psz;
2911 double fontval;
2912
2913 if(fontstr[0] == '-') {
2914 pattern = XftXlfdParse(fontstr, False, False);
2915 } else {
2916 pattern = FcNameParse((FcChar8 *)fontstr);
2917 }
2918
2919 if(!pattern)
2920 die("st: can't open font %s\n", fontstr);
2921
2922 if(fontsize > 0) {
2923 FcPatternDel(pattern, FC_PIXEL_SIZE);
2924 FcPatternDel(pattern, FC_SIZE);
2925 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2926 usedfontsize = fontsize;
2927 } else {
2928 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2929 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2930 if(r_psz == FcResultMatch) {
2931 usedfontsize = fontval;
2932 } else if(r_sz == FcResultMatch) {
2933 usedfontsize = -1;
2934 } else {
2935 /*
2936 * Default font size is 12, if none given. This is to
2937 * have a known usedfontsize value.
2938 */
2939 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2940 usedfontsize = 12;
2941 }
2942 }
2943
2944 FcConfigSubstitute(0, pattern, FcMatchPattern);
2945 FcDefaultSubstitute(pattern);
2946
2947 if(xloadfont(&dc.font, pattern))
2948 die("st: can't open font %s\n", fontstr);
2949
2950 if(usedfontsize < 0) {
2951 FcPatternGetDouble(dc.font.match->pattern,
2952 FC_PIXEL_SIZE, 0, &fontval);
2953 usedfontsize = fontval;
2954 }
2955
2956 /* Setting character width and height. */
2957 xw.cw = CEIL(dc.font.width * cwscale);
2958 xw.ch = CEIL(dc.font.height * chscale);
2959
2960 FcPatternDel(pattern, FC_SLANT);
2961 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2962 if(xloadfont(&dc.ifont, pattern))
2963 die("st: can't open font %s\n", fontstr);
2964
2965 FcPatternDel(pattern, FC_WEIGHT);
2966 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2967 if(xloadfont(&dc.ibfont, pattern))
2968 die("st: can't open font %s\n", fontstr);
2969
2970 FcPatternDel(pattern, FC_SLANT);
2971 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2972 if(xloadfont(&dc.bfont, pattern))
2973 die("st: can't open font %s\n", fontstr);
2974
2975 FcPatternDestroy(pattern);
2976 }
2977
2978 int
2979 xloadfontset(Font *f) {
2980 FcResult result;
2981
2982 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2983 return 1;
2984 return 0;
2985 }
2986
2987 void
2988 xunloadfont(Font *f) {
2989 XftFontClose(xw.dpy, f->match);
2990 FcPatternDestroy(f->pattern);
2991 if(f->set)
2992 FcFontSetDestroy(f->set);
2993 }
2994
2995 void
2996 xunloadfonts(void) {
2997 int i;
2998
2999 /* Free the loaded fonts in the font cache. */
3000 for(i = 0; i < frclen; i++) {
3001 XftFontClose(xw.dpy, frc[i].font);
3002 }
3003 frclen = 0;
3004
3005 xunloadfont(&dc.font);
3006 xunloadfont(&dc.bfont);
3007 xunloadfont(&dc.ifont);
3008 xunloadfont(&dc.ibfont);
3009 }
3010
3011 void
3012 xzoom(const Arg *arg) {
3013 xunloadfonts();
3014 xloadfonts(usedfont, usedfontsize + arg->i);
3015 cresize(0, 0);
3016 redraw(0);
3017 }
3018
3019 void
3020 xinit(void) {
3021 XGCValues gcvalues;
3022 Cursor cursor;
3023 Window parent;
3024 pid_t thispid = getpid();
3025
3026 if(!(xw.dpy = XOpenDisplay(NULL)))
3027 die("Can't open display\n");
3028 xw.scr = XDefaultScreen(xw.dpy);
3029 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3030
3031 /* font */
3032 if(!FcInit())
3033 die("Could not init fontconfig.\n");
3034
3035 usedfont = (opt_font == NULL)? font : opt_font;
3036 xloadfonts(usedfont, 0);
3037
3038 /* colors */
3039 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3040 xloadcols();
3041
3042 /* adjust fixed window geometry */
3043 xw.w = 2 * borderpx + term.col * xw.cw;
3044 xw.h = 2 * borderpx + term.row * xw.ch;
3045 if(xw.gm & XNegative)
3046 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3047 if(xw.gm & YNegative)
3048 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3049
3050 /* Events */
3051 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3052 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3053 xw.attrs.bit_gravity = NorthWestGravity;
3054 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3055 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3056 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3057 xw.attrs.colormap = xw.cmap;
3058
3059 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3060 XRootWindow(xw.dpy, xw.scr);
3061 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3062 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3063 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3064 | CWEventMask | CWColormap, &xw.attrs);
3065
3066 memset(&gcvalues, 0, sizeof(gcvalues));
3067 gcvalues.graphics_exposures = False;
3068 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3069 &gcvalues);
3070 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3071 DefaultDepth(xw.dpy, xw.scr));
3072 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3073 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3074
3075 /* Xft rendering context */
3076 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3077
3078 /* input methods */
3079 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3080 XSetLocaleModifiers("@im=local");
3081 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3082 XSetLocaleModifiers("@im=");
3083 if((xw.xim = XOpenIM(xw.dpy,
3084 NULL, NULL, NULL)) == NULL) {
3085 die("XOpenIM failed. Could not open input"
3086 " device.\n");
3087 }
3088 }
3089 }
3090 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3091 | XIMStatusNothing, XNClientWindow, xw.win,
3092 XNFocusWindow, xw.win, NULL);
3093 if(xw.xic == NULL)
3094 die("XCreateIC failed. Could not obtain input method.\n");
3095
3096 /* white cursor, black outline */
3097 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3098 XDefineCursor(xw.dpy, xw.win, cursor);
3099 XRecolorCursor(xw.dpy, cursor,
3100 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3101 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3102
3103 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3104 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3105 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3106 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3107
3108 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3109 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3110 PropModeReplace, (uchar *)&thispid, 1);
3111
3112 xresettitle();
3113 XMapWindow(xw.dpy, xw.win);
3114 xhints();
3115 XSync(xw.dpy, False);
3116 }
3117
3118 void
3119 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3120 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3121 width = charlen * xw.cw, xp, i;
3122 int frcflags;
3123 int u8fl, u8fblen, u8cblen, doesexist;
3124 char *u8c, *u8fs;
3125 long unicodep;
3126 Font *font = &dc.font;
3127 FcResult fcres;
3128 FcPattern *fcpattern, *fontpattern;
3129 FcFontSet *fcsets[] = { NULL };
3130 FcCharSet *fccharset;
3131 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3132 XRenderColor colfg, colbg;
3133 XRectangle r;
3134 int oneatatime;
3135
3136 frcflags = FRC_NORMAL;
3137
3138 if(base.mode & ATTR_ITALIC) {
3139 if(base.fg == defaultfg)
3140 base.fg = defaultitalic;
3141 font = &dc.ifont;
3142 frcflags = FRC_ITALIC;
3143 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3144 if(base.fg == defaultfg)
3145 base.fg = defaultitalic;
3146 font = &dc.ibfont;
3147 frcflags = FRC_ITALICBOLD;
3148 } else if(base.mode & ATTR_UNDERLINE) {
3149 if(base.fg == defaultfg)
3150 base.fg = defaultunderline;
3151 }
3152
3153 if(IS_TRUECOL(base.fg)) {
3154 colfg.alpha = 0xffff;
3155 colfg.red = TRUERED(base.fg);
3156 colfg.green = TRUEGREEN(base.fg);
3157 colfg.blue = TRUEBLUE(base.fg);
3158 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3159 fg = &truefg;
3160 } else {
3161 fg = &dc.col[base.fg];
3162 }
3163
3164 if(IS_TRUECOL(base.bg)) {
3165 colbg.alpha = 0xffff;
3166 colbg.green = TRUEGREEN(base.bg);
3167 colbg.red = TRUERED(base.bg);
3168 colbg.blue = TRUEBLUE(base.bg);
3169 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3170 bg = &truebg;
3171 } else {
3172 bg = &dc.col[base.bg];
3173 }
3174
3175 if(base.mode & ATTR_BOLD) {
3176 if(BETWEEN(base.fg, 0, 7)) {
3177 /* basic system colors */
3178 fg = &dc.col[base.fg + 8];
3179 } else if(BETWEEN(base.fg, 16, 195)) {
3180 /* 256 colors */
3181 fg = &dc.col[base.fg + 36];
3182 } else if(BETWEEN(base.fg, 232, 251)) {
3183 /* greyscale */
3184 fg = &dc.col[base.fg + 4];
3185 }
3186 /*
3187 * Those ranges will not be brightened:
3188 * 8 - 15 – bright system colors
3189 * 196 - 231 – highest 256 color cube
3190 * 252 - 255 – brightest colors in greyscale
3191 */
3192 font = &dc.bfont;
3193 frcflags = FRC_BOLD;
3194 }
3195
3196 if(IS_SET(MODE_REVERSE)) {
3197 if(fg == &dc.col[defaultfg]) {
3198 fg = &dc.col[defaultbg];
3199 } else {
3200 colfg.red = ~fg->color.red;
3201 colfg.green = ~fg->color.green;
3202 colfg.blue = ~fg->color.blue;
3203 colfg.alpha = fg->color.alpha;
3204 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3205 &revfg);
3206 fg = &revfg;
3207 }
3208
3209 if(bg == &dc.col[defaultbg]) {
3210 bg = &dc.col[defaultfg];
3211 } else {
3212 colbg.red = ~bg->color.red;
3213 colbg.green = ~bg->color.green;
3214 colbg.blue = ~bg->color.blue;
3215 colbg.alpha = bg->color.alpha;
3216 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3217 &revbg);
3218 bg = &revbg;
3219 }
3220 }
3221
3222 if(base.mode & ATTR_REVERSE) {
3223 temp = fg;
3224 fg = bg;
3225 bg = temp;
3226 }
3227
3228 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3229 fg = bg;
3230
3231 /* Intelligent cleaning up of the borders. */
3232 if(x == 0) {
3233 xclear(0, (y == 0)? 0 : winy, borderpx,
3234 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3235 }
3236 if(x + charlen >= term.col) {
3237 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3238 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3239 }
3240 if(y == 0)
3241 xclear(winx, 0, winx + width, borderpx);
3242 if(y == term.row-1)
3243 xclear(winx, winy + xw.ch, winx + width, xw.h);
3244
3245 /* Clean up the region we want to draw to. */
3246 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3247
3248 /* Set the clip region because Xft is sometimes dirty. */
3249 r.x = 0;
3250 r.y = 0;
3251 r.height = xw.ch;
3252 r.width = width;
3253 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3254
3255 for(xp = winx; bytelen > 0;) {
3256 /*
3257 * Search for the range in the to be printed string of glyphs
3258 * that are in the main font. Then print that range. If
3259 * some glyph is found that is not in the font, do the
3260 * fallback dance.
3261 */
3262 u8fs = s;
3263 u8fblen = 0;
3264 u8fl = 0;
3265 oneatatime = font->width != xw.cw;
3266 for(;;) {
3267 u8c = s;
3268 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3269 s += u8cblen;
3270 bytelen -= u8cblen;
3271
3272 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3273 if(oneatatime || !doesexist || bytelen <= 0) {
3274 if(oneatatime || bytelen <= 0) {
3275 if(doesexist) {
3276 u8fl++;
3277 u8fblen += u8cblen;
3278 }
3279 }
3280
3281 if(u8fl > 0) {
3282 XftDrawStringUtf8(xw.draw, fg,
3283 font->match, xp,
3284 winy + font->ascent,
3285 (FcChar8 *)u8fs,
3286 u8fblen);
3287 xp += xw.cw * u8fl;
3288
3289 }
3290 break;
3291 }
3292
3293 u8fl++;
3294 u8fblen += u8cblen;
3295 }
3296 if(doesexist) {
3297 if(oneatatime)
3298 continue;
3299 break;
3300 }
3301
3302 /* Search the font cache. */
3303 for(i = 0; i < frclen; i++) {
3304 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3305 && frc[i].flags == frcflags) {
3306 break;
3307 }
3308 }
3309
3310 /* Nothing was found. */
3311 if(i >= frclen) {
3312 if(!font->set)
3313 xloadfontset(font);
3314 fcsets[0] = font->set;
3315
3316 /*
3317 * Nothing was found in the cache. Now use
3318 * some dozen of Fontconfig calls to get the
3319 * font for one single character.
3320 *
3321 * Xft and fontconfig are design failures.
3322 */
3323 fcpattern = FcPatternDuplicate(font->pattern);
3324 fccharset = FcCharSetCreate();
3325
3326 FcCharSetAddChar(fccharset, unicodep);
3327 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3328 fccharset);
3329 FcPatternAddBool(fcpattern, FC_SCALABLE,
3330 FcTrue);
3331
3332 FcConfigSubstitute(0, fcpattern,
3333 FcMatchPattern);
3334 FcDefaultSubstitute(fcpattern);
3335
3336 fontpattern = FcFontSetMatch(0, fcsets,
3337 FcTrue, fcpattern, &fcres);
3338
3339 /*
3340 * Overwrite or create the new cache entry.
3341 */
3342 if(frclen >= LEN(frc)) {
3343 frclen = LEN(frc) - 1;
3344 XftFontClose(xw.dpy, frc[frclen].font);
3345 }
3346
3347 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3348 fontpattern);
3349 frc[frclen].flags = frcflags;
3350
3351 i = frclen;
3352 frclen++;
3353
3354 FcPatternDestroy(fcpattern);
3355 FcCharSetDestroy(fccharset);
3356 }
3357
3358 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3359 xp, winy + frc[i].font->ascent,
3360 (FcChar8 *)u8c, u8cblen);
3361
3362 xp += xw.cw * wcwidth(unicodep);
3363 }
3364
3365 /*
3366 * This is how the loop above actually should be. Why does the
3367 * application have to care about font details?
3368 *
3369 * I have to repeat: Xft and Fontconfig are design failures.
3370 */
3371 /*
3372 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3373 winy + font->ascent, (FcChar8 *)s, bytelen);
3374 */
3375
3376 if(base.mode & ATTR_UNDERLINE) {
3377 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3378 width, 1);
3379 }
3380
3381 /* Reset clip to none. */
3382 XftDrawSetClip(xw.draw, 0);
3383 }
3384
3385 void
3386 xdrawcursor(void) {
3387 static int oldx = 0, oldy = 0;
3388 int sl, width, curx;
3389 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3390
3391 LIMIT(oldx, 0, term.col-1);
3392 LIMIT(oldy, 0, term.row-1);
3393
3394 curx = term.c.x;
3395
3396 /* adjust position if in dummy */
3397 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3398 oldx--;
3399 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3400 curx--;
3401
3402 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3403
3404 /* remove the old cursor */
3405 sl = utf8len(term.line[oldy][oldx].c);
3406 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3407 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3408 oldy, width, sl);
3409
3410 /* draw the new one */
3411 if(!(IS_SET(MODE_HIDE))) {
3412 if(xw.state & WIN_FOCUSED) {
3413 if(IS_SET(MODE_REVERSE)) {
3414 g.mode |= ATTR_REVERSE;
3415 g.fg = defaultcs;
3416 g.bg = defaultfg;
3417 }
3418
3419 sl = utf8len(g.c);
3420 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3421 ? 2 : 1;
3422 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3423 } else {
3424 XftDrawRect(xw.draw, &dc.col[defaultcs],
3425 borderpx + curx * xw.cw,
3426 borderpx + term.c.y * xw.ch,
3427 xw.cw - 1, 1);
3428 XftDrawRect(xw.draw, &dc.col[defaultcs],
3429 borderpx + curx * xw.cw,
3430 borderpx + term.c.y * xw.ch,
3431 1, xw.ch - 1);
3432 XftDrawRect(xw.draw, &dc.col[defaultcs],
3433 borderpx + (curx + 1) * xw.cw - 1,
3434 borderpx + term.c.y * xw.ch,
3435 1, xw.ch - 1);
3436 XftDrawRect(xw.draw, &dc.col[defaultcs],
3437 borderpx + curx * xw.cw,
3438 borderpx + (term.c.y + 1) * xw.ch - 1,
3439 xw.cw, 1);
3440 }
3441 oldx = curx, oldy = term.c.y;
3442 }
3443 }
3444
3445
3446 void
3447 xsettitle(char *p) {
3448 XTextProperty prop;
3449
3450 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3451 &prop);
3452 XSetWMName(xw.dpy, xw.win, &prop);
3453 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3454 XFree(prop.value);
3455 }
3456
3457 void
3458 xresettitle(void) {
3459 xsettitle(opt_title ? opt_title : "st");
3460 }
3461
3462 void
3463 redraw(int timeout) {
3464 struct timespec tv = {0, timeout * 1000};
3465
3466 draw();
3467
3468 if(timeout > 0) {
3469 nanosleep(&tv, NULL);
3470 XSync(xw.dpy, False); /* necessary for a good tput flash */
3471 }
3472 }
3473
3474 void
3475 draw(void) {
3476 drawregion(0, 0, term.col, term.row);
3477 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3478 xw.h, 0, 0);
3479 XSetForeground(xw.dpy, dc.gc,
3480 dc.col[IS_SET(MODE_REVERSE)?
3481 defaultfg : defaultbg].pixel);
3482 }
3483
3484 void
3485 drawregion(int x1, int y1, int x2, int y2) {
3486 int ic, ib, x, y, ox, sl;
3487 Glyph base, new;
3488 char buf[DRAW_BUF_SIZ];
3489 bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
3490 long unicodep;
3491
3492 if(!(xw.state & WIN_VISIBLE))
3493 return;
3494
3495 for(y = y1; y < y2; y++) {
3496 if(!term.dirty[y])
3497 continue;
3498
3499 xtermclear(0, y, term.col, y);
3500 term.dirty[y] = 0;
3501 base = term.line[y][0];
3502 ic = ib = ox = 0;
3503 for(x = x1; x < x2; x++) {
3504 new = term.line[y][x];
3505 if(new.mode == ATTR_WDUMMY)
3506 continue;
3507 if(ena_sel && selected(x, y))
3508 new.mode ^= ATTR_REVERSE;
3509 if(ib > 0 && (ATTRCMP(base, new)
3510 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3511 xdraws(buf, base, ox, y, ic, ib);
3512 ic = ib = 0;
3513 }
3514 if(ib == 0) {
3515 ox = x;
3516 base = new;
3517 }
3518
3519 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3520 memcpy(buf+ib, new.c, sl);
3521 ib += sl;
3522 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3523 }
3524 if(ib > 0)
3525 xdraws(buf, base, ox, y, ic, ib);
3526 }
3527 xdrawcursor();
3528 }
3529
3530 void
3531 expose(XEvent *ev) {
3532 XExposeEvent *e = &ev->xexpose;
3533
3534 if(xw.state & WIN_REDRAW) {
3535 if(!e->count)
3536 xw.state &= ~WIN_REDRAW;
3537 }
3538 redraw(0);
3539 }
3540
3541 void
3542 visibility(XEvent *ev) {
3543 XVisibilityEvent *e = &ev->xvisibility;
3544
3545 if(e->state == VisibilityFullyObscured) {
3546 xw.state &= ~WIN_VISIBLE;
3547 } else if(!(xw.state & WIN_VISIBLE)) {
3548 /* need a full redraw for next Expose, not just a buf copy */
3549 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3550 }
3551 }
3552
3553 void
3554 unmap(XEvent *ev) {
3555 xw.state &= ~WIN_VISIBLE;
3556 }
3557
3558 void
3559 xsetpointermotion(int set) {
3560 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3561 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3562 }
3563
3564 void
3565 xseturgency(int add) {
3566 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3567
3568 MODBIT(h->flags, add, XUrgencyHint);
3569 XSetWMHints(xw.dpy, xw.win, h);
3570 XFree(h);
3571 }
3572
3573 void
3574 focus(XEvent *ev) {
3575 XFocusChangeEvent *e = &ev->xfocus;
3576
3577 if(e->mode == NotifyGrab)
3578 return;
3579
3580 if(ev->type == FocusIn) {
3581 XSetICFocus(xw.xic);
3582 xw.state |= WIN_FOCUSED;
3583 xseturgency(0);
3584 if(IS_SET(MODE_FOCUS))
3585 ttywrite("\033[I", 3);
3586 } else {
3587 XUnsetICFocus(xw.xic);
3588 xw.state &= ~WIN_FOCUSED;
3589 if(IS_SET(MODE_FOCUS))
3590 ttywrite("\033[O", 3);
3591 }
3592 }
3593
3594 static inline bool
3595 match(uint mask, uint state) {
3596 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3597 }
3598
3599 void
3600 numlock(const Arg *dummy) {
3601 term.numlock ^= 1;
3602 }
3603
3604 char*
3605 kmap(KeySym k, uint state) {
3606 Key *kp;
3607 int i;
3608
3609 /* Check for mapped keys out of X11 function keys. */
3610 for(i = 0; i < LEN(mappedkeys); i++) {
3611 if(mappedkeys[i] == k)
3612 break;
3613 }
3614 if(i == LEN(mappedkeys)) {
3615 if((k & 0xFFFF) < 0xFD00)
3616 return NULL;
3617 }
3618
3619 for(kp = key; kp < key + LEN(key); kp++) {
3620 if(kp->k != k)
3621 continue;
3622
3623 if(!match(kp->mask, state))
3624 continue;
3625
3626 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3627 continue;
3628 if(term.numlock && kp->appkey == 2)
3629 continue;
3630
3631 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3632 continue;
3633
3634 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3635 continue;
3636
3637 return kp->s;
3638 }
3639
3640 return NULL;
3641 }
3642
3643 void
3644 kpress(XEvent *ev) {
3645 XKeyEvent *e = &ev->xkey;
3646 KeySym ksym;
3647 char buf[32], *customkey;
3648 int len;
3649 long c;
3650 Status status;
3651 Shortcut *bp;
3652
3653 if(IS_SET(MODE_KBDLOCK))
3654 return;
3655
3656 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3657 /* 1. shortcuts */
3658 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3659 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3660 bp->func(&(bp->arg));
3661 return;
3662 }
3663 }
3664
3665 /* 2. custom keys from config.h */
3666 if((customkey = kmap(ksym, e->state))) {
3667 ttysend(customkey, strlen(customkey));
3668 return;
3669 }
3670
3671 /* 3. composed string from input method */
3672 if(len == 0)
3673 return;
3674 if(len == 1 && e->state & Mod1Mask) {
3675 if(IS_SET(MODE_8BIT)) {
3676 if(*buf < 0177) {
3677 c = *buf | 0x80;
3678 len = utf8encode(c, buf, UTF_SIZ);
3679 }
3680 } else {
3681 buf[1] = buf[0];
3682 buf[0] = '\033';
3683 len = 2;
3684 }
3685 }
3686 ttysend(buf, len);
3687 }
3688
3689
3690 void
3691 cmessage(XEvent *e) {
3692 /*
3693 * See xembed specs
3694 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3695 */
3696 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3697 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3698 xw.state |= WIN_FOCUSED;
3699 xseturgency(0);
3700 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3701 xw.state &= ~WIN_FOCUSED;
3702 }
3703 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3704 /* Send SIGHUP to shell */
3705 kill(pid, SIGHUP);
3706 exit(EXIT_SUCCESS);
3707 }
3708 }
3709
3710 void
3711 cresize(int width, int height) {
3712 int col, row;
3713
3714 if(width != 0)
3715 xw.w = width;
3716 if(height != 0)
3717 xw.h = height;
3718
3719 col = (xw.w - 2 * borderpx) / xw.cw;
3720 row = (xw.h - 2 * borderpx) / xw.ch;
3721
3722 tresize(col, row);
3723 xresize(col, row);
3724 ttyresize();
3725 }
3726
3727 void
3728 resize(XEvent *e) {
3729 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3730 return;
3731
3732 cresize(e->xconfigure.width, e->xconfigure.height);
3733 }
3734
3735 void
3736 run(void) {
3737 XEvent ev;
3738 int w = xw.w, h = xw.h;
3739 fd_set rfd;
3740 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3741 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3742
3743 /* Waiting for window mapping */
3744 while(1) {
3745 XNextEvent(xw.dpy, &ev);
3746 if(ev.type == ConfigureNotify) {
3747 w = ev.xconfigure.width;
3748 h = ev.xconfigure.height;
3749 } else if(ev.type == MapNotify) {
3750 break;
3751 }
3752 }
3753
3754 ttynew();
3755 cresize(w, h);
3756
3757 gettimeofday(&last, NULL);
3758 lastblink = last;
3759
3760 for(xev = actionfps;;) {
3761 long deltatime;
3762
3763 FD_ZERO(&rfd);
3764 FD_SET(cmdfd, &rfd);
3765 FD_SET(xfd, &rfd);
3766
3767 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3768 if(errno == EINTR)
3769 continue;
3770 die("select failed: %s\n", strerror(errno));
3771 }
3772 if(FD_ISSET(cmdfd, &rfd)) {
3773 ttyread();
3774 if(blinktimeout) {
3775 blinkset = tattrset(ATTR_BLINK);
3776 if(!blinkset)
3777 MODBIT(term.mode, 0, MODE_BLINK);
3778 }
3779 }
3780
3781 if(FD_ISSET(xfd, &rfd))
3782 xev = actionfps;
3783
3784 gettimeofday(&now, NULL);
3785 drawtimeout.tv_sec = 0;
3786 drawtimeout.tv_usec = (1000/xfps) * 1000;
3787 tv = &drawtimeout;
3788
3789 dodraw = 0;
3790 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3791 tsetdirtattr(ATTR_BLINK);
3792 term.mode ^= MODE_BLINK;
3793 lastblink = now;
3794 dodraw = 1;
3795 }
3796 deltatime = TIMEDIFF(now, last);
3797 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3798 || deltatime < 0) {
3799 dodraw = 1;
3800 last = now;
3801 }
3802
3803 if(dodraw) {
3804 while(XPending(xw.dpy)) {
3805 XNextEvent(xw.dpy, &ev);
3806 if(XFilterEvent(&ev, None))
3807 continue;
3808 if(handler[ev.type])
3809 (handler[ev.type])(&ev);
3810 }
3811
3812 draw();
3813 XFlush(xw.dpy);
3814
3815 if(xev && !FD_ISSET(xfd, &rfd))
3816 xev--;
3817 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3818 if(blinkset) {
3819 if(TIMEDIFF(now, lastblink) \
3820 > blinktimeout) {
3821 drawtimeout.tv_usec = 1;
3822 } else {
3823 drawtimeout.tv_usec = (1000 * \
3824 (blinktimeout - \
3825 TIMEDIFF(now,
3826 lastblink)));
3827 }
3828 } else {
3829 tv = NULL;
3830 }
3831 }
3832 }
3833 }
3834 }
3835
3836 void
3837 usage(void) {
3838 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3839 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3840 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3841 }
3842
3843 int
3844 main(int argc, char *argv[]) {
3845 char *titles;
3846 uint cols = 80, rows = 24;
3847
3848 xw.l = xw.t = 0;
3849 xw.isfixed = False;
3850
3851 ARGBEGIN {
3852 case 'a':
3853 allowaltscreen = false;
3854 break;
3855 case 'c':
3856 opt_class = EARGF(usage());
3857 break;
3858 case 'e':
3859 /* eat all remaining arguments */
3860 if(argc > 1) {
3861 opt_cmd = &argv[1];
3862 if(argv[1] != NULL && opt_title == NULL) {
3863 titles = xstrdup(argv[1]);
3864 opt_title = basename(titles);
3865 }
3866 }
3867 goto run;
3868 case 'f':
3869 opt_font = EARGF(usage());
3870 break;
3871 case 'g':
3872 xw.gm = XParseGeometry(EARGF(usage()),
3873 &xw.l, &xw.t, &cols, &rows);
3874 break;
3875 case 'i':
3876 xw.isfixed = True;
3877 break;
3878 case 'o':
3879 opt_io = EARGF(usage());
3880 break;
3881 case 't':
3882 opt_title = EARGF(usage());
3883 break;
3884 case 'w':
3885 opt_embed = EARGF(usage());
3886 break;
3887 case 'v':
3888 default:
3889 usage();
3890 } ARGEND;
3891
3892 run:
3893 setlocale(LC_CTYPE, "");
3894 XSetLocaleModifiers("");
3895 tnew(cols? cols : 1, rows? rows : 1);
3896 xinit();
3897 selinit();
3898 run();
3899
3900 return 0;
3901 }
3902