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