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2945c1bad04d938350475e9b77fe0c28758659b9
[st.git] / st.c
1 /* See LICENSE for licence details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdbool.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <signal.h>
14 #include <stdint.h>
15 #include <sys/ioctl.h>
16 #include <sys/select.h>
17 #include <sys/stat.h>
18 #include <sys/time.h>
19 #include <sys/types.h>
20 #include <sys/wait.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <X11/Xatom.h>
25 #include <X11/Xlib.h>
26 #include <X11/Xutil.h>
27 #include <X11/cursorfont.h>
28 #include <X11/keysym.h>
29 #include <X11/Xft/Xft.h>
30 #include <fontconfig/fontconfig.h>
31 #include <wchar.h>
32
33 #include "arg.h"
34
35 char *argv0;
36
37 #define Glyph Glyph_
38 #define Font Font_
39
40 #if defined(__linux)
41 #include <pty.h>
42 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
43 #include <util.h>
44 #elif defined(__FreeBSD__) || defined(__DragonFly__)
45 #include <libutil.h>
46 #endif
47
48
49 /* XEMBED messages */
50 #define XEMBED_FOCUS_IN 4
51 #define XEMBED_FOCUS_OUT 5
52
53 /* Arbitrary sizes */
54 #define UTF_INVALID 0xFFFD
55 #define UTF_SIZ 4
56 #define ESC_BUF_SIZ (128*UTF_SIZ)
57 #define ESC_ARG_SIZ 16
58 #define STR_BUF_SIZ ESC_BUF_SIZ
59 #define STR_ARG_SIZ ESC_ARG_SIZ
60 #define DRAW_BUF_SIZ 20*1024
61 #define XK_ANY_MOD UINT_MAX
62 #define XK_NO_MOD 0
63 #define XK_SWITCH_MOD (1<<13)
64
65 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
66
67 /* macros */
68 #define MIN(a, b) ((a) < (b) ? (a) : (b))
69 #define MAX(a, b) ((a) < (b) ? (b) : (a))
70 #define LEN(a) (sizeof(a) / sizeof(a)[0])
71 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
72 #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
73 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f))
74 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
75 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
76 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
77 #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
78 #define IS_SET(flag) ((term.mode & (flag)) != 0)
79 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
80 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
81 #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
82
83 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
84 #define IS_TRUECOL(x) (1 << 24 & (x))
85 #define TRUERED(x) (((x) & 0xff0000) >> 8)
86 #define TRUEGREEN(x) (((x) & 0xff00))
87 #define TRUEBLUE(x) (((x) & 0xff) << 8)
88
89
90 #define VT102ID "\033[?6c"
91
92 enum glyph_attribute {
93 ATTR_NULL = 0,
94 ATTR_REVERSE = 1,
95 ATTR_UNDERLINE = 2,
96 ATTR_BOLD = 4,
97 ATTR_GFX = 8,
98 ATTR_ITALIC = 16,
99 ATTR_BLINK = 32,
100 ATTR_WRAP = 64,
101 ATTR_WIDE = 128,
102 ATTR_WDUMMY = 256,
103 };
104
105 enum cursor_movement {
106 CURSOR_SAVE,
107 CURSOR_LOAD
108 };
109
110 enum cursor_state {
111 CURSOR_DEFAULT = 0,
112 CURSOR_WRAPNEXT = 1,
113 CURSOR_ORIGIN = 2
114 };
115
116 enum term_mode {
117 MODE_WRAP = 1,
118 MODE_INSERT = 2,
119 MODE_APPKEYPAD = 4,
120 MODE_ALTSCREEN = 8,
121 MODE_CRLF = 16,
122 MODE_MOUSEBTN = 32,
123 MODE_MOUSEMOTION = 64,
124 MODE_REVERSE = 128,
125 MODE_KBDLOCK = 256,
126 MODE_HIDE = 512,
127 MODE_ECHO = 1024,
128 MODE_APPCURSOR = 2048,
129 MODE_MOUSESGR = 4096,
130 MODE_8BIT = 8192,
131 MODE_BLINK = 16384,
132 MODE_FBLINK = 32768,
133 MODE_FOCUS = 65536,
134 MODE_MOUSEX10 = 131072,
135 MODE_MOUSEMANY = 262144,
136 MODE_BRCKTPASTE = 524288,
137 MODE_PRINT = 1048576,
138 MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
139 |MODE_MOUSEMANY,
140 };
141
142 enum charset {
143 CS_GRAPHIC0,
144 CS_GRAPHIC1,
145 CS_UK,
146 CS_USA,
147 CS_MULTI,
148 CS_GER,
149 CS_FIN
150 };
151
152 enum escape_state {
153 ESC_START = 1,
154 ESC_CSI = 2,
155 ESC_STR = 4, /* DCS, OSC, PM, APC */
156 ESC_ALTCHARSET = 8,
157 ESC_STR_END = 16, /* a final string was encountered */
158 ESC_TEST = 32, /* Enter in test mode */
159 };
160
161 enum window_state {
162 WIN_VISIBLE = 1,
163 WIN_REDRAW = 2,
164 WIN_FOCUSED = 4
165 };
166
167 enum selection_type {
168 SEL_REGULAR = 1,
169 SEL_RECTANGULAR = 2
170 };
171
172 enum selection_snap {
173 SNAP_WORD = 1,
174 SNAP_LINE = 2
175 };
176
177 typedef unsigned char uchar;
178 typedef unsigned int uint;
179 typedef unsigned long ulong;
180 typedef unsigned short ushort;
181
182 typedef XftDraw *Draw;
183 typedef XftColor Colour;
184 typedef Colormap Colourmap;
185
186 typedef struct {
187 char c[UTF_SIZ]; /* character code */
188 ushort mode; /* attribute flags */
189 uint32_t fg; /* foreground */
190 uint32_t bg; /* background */
191 } Glyph;
192
193 typedef Glyph *Line;
194
195 typedef struct {
196 Glyph attr; /* current char attributes */
197 int x;
198 int y;
199 char state;
200 } TCursor;
201
202 /* CSI Escape sequence structs */
203 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
204 typedef struct {
205 char buf[ESC_BUF_SIZ]; /* raw string */
206 int len; /* raw string length */
207 char priv;
208 int arg[ESC_ARG_SIZ];
209 int narg; /* nb of args */
210 char mode;
211 } CSIEscape;
212
213 /* STR Escape sequence structs */
214 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
215 typedef struct {
216 char type; /* ESC type ... */
217 char buf[STR_BUF_SIZ]; /* raw string */
218 int len; /* raw string length */
219 char *args[STR_ARG_SIZ];
220 int narg; /* nb of args */
221 } STREscape;
222
223 /* Internal representation of the screen */
224 typedef struct {
225 int row; /* nb row */
226 int col; /* nb col */
227 Line *line; /* screen */
228 Line *alt; /* alternate screen */
229 bool *dirty; /* dirtyness of lines */
230 TCursor c; /* cursor */
231 int top; /* top scroll limit */
232 int bot; /* bottom scroll limit */
233 int mode; /* terminal mode flags */
234 int esc; /* escape state flags */
235 char trantbl[4]; /* charset table translation */
236 int charset; /* current charset */
237 int icharset; /* selected charset for sequence */
238 bool numlock; /* lock numbers in keyboard */
239 bool *tabs;
240 } Term;
241
242 /* Purely graphic info */
243 typedef struct {
244 Display *dpy;
245 Colourmap cmap;
246 Window win;
247 Drawable buf;
248 Atom xembed, wmdeletewin, netwmname, netwmpid;
249 XIM xim;
250 XIC xic;
251 Draw draw;
252 Visual *vis;
253 XSetWindowAttributes attrs;
254 int scr;
255 bool isfixed; /* is fixed geometry? */
256 int l, t; /* left and top offset */
257 int gm; /* geometry mask */
258 int tw, th; /* tty width and height */
259 int w, h; /* window width and height */
260 int ch; /* char height */
261 int cw; /* char width */
262 char state; /* focus, redraw, visible */
263 } XWindow;
264
265 typedef struct {
266 uint b;
267 uint mask;
268 char *s;
269 } Mousekey;
270
271 typedef struct {
272 KeySym k;
273 uint mask;
274 char *s;
275 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
276 signed char appkey; /* application keypad */
277 signed char appcursor; /* application cursor */
278 signed char crlf; /* crlf mode */
279 } Key;
280
281 typedef struct {
282 int mode;
283 int type;
284 int snap;
285 /*
286 * Selection variables:
287 * nb – normalized coordinates of the beginning of the selection
288 * ne – normalized coordinates of the end of the selection
289 * ob – original coordinates of the beginning of the selection
290 * oe – original coordinates of the end of the selection
291 */
292 struct {
293 int x, y;
294 } nb, ne, ob, oe;
295
296 char *clip;
297 Atom xtarget;
298 bool alt;
299 struct timeval tclick1;
300 struct timeval tclick2;
301 } Selection;
302
303 typedef union {
304 int i;
305 uint ui;
306 float f;
307 const void *v;
308 } Arg;
309
310 typedef struct {
311 uint mod;
312 KeySym keysym;
313 void (*func)(const Arg *);
314 const Arg arg;
315 } Shortcut;
316
317 /* function definitions used in config.h */
318 static void clippaste(const Arg *);
319 static void numlock(const Arg *);
320 static void selpaste(const Arg *);
321 static void xzoom(const Arg *);
322 static void printsel(const Arg *);
323 static void printscreen(const Arg *) ;
324 static void toggleprinter(const Arg *);
325
326 /* Config.h for applying patches and the configuration. */
327 #include "config.h"
328
329 /* Font structure */
330 typedef struct {
331 int height;
332 int width;
333 int ascent;
334 int descent;
335 short lbearing;
336 short rbearing;
337 XftFont *match;
338 FcFontSet *set;
339 FcPattern *pattern;
340 } Font;
341
342 /* Drawing Context */
343 typedef struct {
344 Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
345 Font font, bfont, ifont, ibfont;
346 GC gc;
347 } DC;
348
349 static void die(const char *, ...);
350 static void draw(void);
351 static void redraw(int);
352 static void drawregion(int, int, int, int);
353 static void execsh(void);
354 static void sigchld(int);
355 static void run(void);
356
357 static void csidump(void);
358 static void csihandle(void);
359 static void csiparse(void);
360 static void csireset(void);
361 static void strdump(void);
362 static void strhandle(void);
363 static void strparse(void);
364 static void strreset(void);
365
366 static int tattrset(int);
367 static void tprinter(char *, size_t);
368 static void tdumpsel(void);
369 static void tdumpline(int);
370 static void tdump(void);
371 static void tclearregion(int, int, int, int);
372 static void tcursor(int);
373 static void tdeletechar(int);
374 static void tdeleteline(int);
375 static void tinsertblank(int);
376 static void tinsertblankline(int);
377 static void tmoveto(int, int);
378 static void tmoveato(int, int);
379 static void tnew(int, int);
380 static void tnewline(int);
381 static void tputtab(int);
382 static void tputc(char *, int);
383 static void treset(void);
384 static int tresize(int, int);
385 static void tscrollup(int, int);
386 static void tscrolldown(int, int);
387 static void tsetattr(int *, int);
388 static void tsetchar(char *, Glyph *, int, int);
389 static void tsetscroll(int, int);
390 static void tswapscreen(void);
391 static void tsetdirt(int, int);
392 static void tsetdirtattr(int);
393 static void tsetmode(bool, bool, int *, int);
394 static void tfulldirt(void);
395 static void techo(char *, int);
396 static bool tcontrolcode(uchar );
397 static void tdectest(char );
398 static int32_t tdefcolor(int *, int *, int);
399 static void tselcs(void);
400 static void tdeftran(char);
401 static inline bool match(uint, uint);
402 static void ttynew(void);
403 static void ttyread(void);
404 static void ttyresize(void);
405 static void ttysend(char *, size_t);
406 static void ttywrite(const char *, size_t);
407
408 static void xdraws(char *, Glyph, int, int, int, int);
409 static void xhints(void);
410 static void xclear(int, int, int, int);
411 static void xdrawcursor(void);
412 static void xinit(void);
413 static void xloadcols(void);
414 static int xsetcolorname(int, const char *);
415 static int xgeommasktogravity(int);
416 static int xloadfont(Font *, FcPattern *);
417 static void xloadfonts(char *, double);
418 static int xloadfontset(Font *);
419 static void xsettitle(char *);
420 static void xresettitle(void);
421 static void xsetpointermotion(int);
422 static void xseturgency(int);
423 static void xsetsel(char *);
424 static void xtermclear(int, int, int, int);
425 static void xunloadfont(Font *);
426 static void xunloadfonts(void);
427 static void xresize(int, int);
428
429 static void expose(XEvent *);
430 static void visibility(XEvent *);
431 static void unmap(XEvent *);
432 static char *kmap(KeySym, uint);
433 static void kpress(XEvent *);
434 static void cmessage(XEvent *);
435 static void cresize(int, int);
436 static void resize(XEvent *);
437 static void focus(XEvent *);
438 static void brelease(XEvent *);
439 static void bpress(XEvent *);
440 static void bmotion(XEvent *);
441 static void selnotify(XEvent *);
442 static void selclear(XEvent *);
443 static void selrequest(XEvent *);
444
445 static void selinit(void);
446 static void selsort(void);
447 static inline bool selected(int, int);
448 static char *getsel(void);
449 static void selcopy(void);
450 static void selscroll(int, int);
451 static void selsnap(int, int *, int *, int);
452
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 (*handler[LASTEvent])(XEvent *) = {
466 [KeyPress] = kpress,
467 [ClientMessage] = cmessage,
468 [ConfigureNotify] = resize,
469 [VisibilityNotify] = visibility,
470 [UnmapNotify] = unmap,
471 [Expose] = expose,
472 [FocusIn] = focus,
473 [FocusOut] = focus,
474 [MotionNotify] = bmotion,
475 [ButtonPress] = bpress,
476 [ButtonRelease] = brelease,
477 [SelectionClear] = selclear,
478 [SelectionNotify] = selnotify,
479 [SelectionRequest] = selrequest,
480 };
481
482 /* Globals */
483 static DC dc;
484 static XWindow xw;
485 static Term term;
486 static CSIEscape csiescseq;
487 static STREscape strescseq;
488 static int cmdfd;
489 static pid_t pid;
490 static Selection sel;
491 static int iofd = STDOUT_FILENO;
492 static char **opt_cmd = NULL;
493 static char *opt_io = NULL;
494 static char *opt_title = NULL;
495 static char *opt_embed = NULL;
496 static char *opt_class = NULL;
497 static char *opt_font = NULL;
498 static int oldbutton = 3; /* button event on startup: 3 = release */
499
500 static char *usedfont = NULL;
501 static double usedfontsize = 0;
502
503 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
504 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
505 static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
506 static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
507
508 /* Font Ring Cache */
509 enum {
510 FRC_NORMAL,
511 FRC_ITALIC,
512 FRC_BOLD,
513 FRC_ITALICBOLD
514 };
515
516 typedef struct {
517 XftFont *font;
518 int flags;
519 } Fontcache;
520
521 /* Fontcache is an array now. A new font will be appended to the array. */
522 static Fontcache frc[16];
523 static int frclen = 0;
524
525 ssize_t
526 xwrite(int fd, const char *s, size_t len) {
527 size_t aux = len;
528
529 while(len > 0) {
530 ssize_t r = write(fd, s, len);
531 if(r < 0)
532 return r;
533 len -= r;
534 s += r;
535 }
536 return aux;
537 }
538
539 void *
540 xmalloc(size_t len) {
541 void *p = malloc(len);
542
543 if(!p)
544 die("Out of memory\n");
545
546 return p;
547 }
548
549 void *
550 xrealloc(void *p, size_t len) {
551 if((p = realloc(p, len)) == NULL)
552 die("Out of memory\n");
553
554 return p;
555 }
556
557 char *
558 xstrdup(char *s) {
559 if((s = strdup(s)) == NULL)
560 die("Out of memory\n");
561
562 return s;
563 }
564
565 size_t
566 utf8decode(char *c, long *u, size_t clen) {
567 size_t i, j, len, type;
568 long udecoded;
569
570 *u = UTF_INVALID;
571 if(!clen)
572 return 0;
573 udecoded = utf8decodebyte(c[0], &len);
574 if(!BETWEEN(len, 1, UTF_SIZ))
575 return 1;
576 for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
577 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
578 if(type != 0)
579 return j;
580 }
581 if(j < len)
582 return 0;
583 *u = udecoded;
584 utf8validate(u, len);
585 return len;
586 }
587
588 long
589 utf8decodebyte(char c, size_t *i) {
590 for(*i = 0; *i < LEN(utfmask); ++(*i))
591 if(((uchar)c & utfmask[*i]) == utfbyte[*i])
592 return (uchar)c & ~utfmask[*i];
593 return 0;
594 }
595
596 size_t
597 utf8encode(long u, char *c, size_t clen) {
598 size_t len, i;
599
600 len = utf8validate(&u, 0);
601 if(clen < len)
602 return 0;
603 for(i = len - 1; i != 0; --i) {
604 c[i] = utf8encodebyte(u, 0);
605 u >>= 6;
606 }
607 c[0] = utf8encodebyte(u, len);
608 return len;
609 }
610
611 char
612 utf8encodebyte(long u, size_t i) {
613 return utfbyte[i] | (u & ~utfmask[i]);
614 }
615
616 size_t
617 utf8len(char *c) {
618 return utf8decode(c, &(long){0}, UTF_SIZ);
619 }
620
621 size_t
622 utf8validate(long *u, size_t i) {
623 if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
624 *u = UTF_INVALID;
625 for(i = 1; *u > utfmax[i]; ++i)
626 ;
627 return i;
628 }
629
630 static void
631 selinit(void) {
632 memset(&sel.tclick1, 0, sizeof(sel.tclick1));
633 memset(&sel.tclick2, 0, sizeof(sel.tclick2));
634 sel.mode = 0;
635 sel.ob.x = -1;
636 sel.clip = NULL;
637 sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
638 if(sel.xtarget == None)
639 sel.xtarget = XA_STRING;
640 }
641
642 static int
643 x2col(int x) {
644 x -= borderpx;
645 x /= xw.cw;
646
647 return LIMIT(x, 0, term.col-1);
648 }
649
650 static int
651 y2row(int y) {
652 y -= borderpx;
653 y /= xw.ch;
654
655 return LIMIT(y, 0, term.row-1);
656 }
657
658 static void
659 selsort(void) {
660 if(sel.ob.y == sel.oe.y) {
661 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
662 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
663 } else {
664 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
665 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
666 }
667 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
668 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
669 }
670
671 static inline bool
672 selected(int x, int y) {
673 if(sel.ne.y == y && sel.nb.y == y)
674 return BETWEEN(x, sel.nb.x, sel.ne.x);
675
676 if(sel.type == SEL_RECTANGULAR) {
677 return ((sel.nb.y <= y && y <= sel.ne.y)
678 && (sel.nb.x <= x && x <= sel.ne.x));
679 }
680
681 return ((sel.nb.y < y && y < sel.ne.y)
682 || (y == sel.ne.y && x <= sel.ne.x))
683 || (y == sel.nb.y && x >= sel.nb.x
684 && (x <= sel.ne.x || sel.nb.y != sel.ne.y));
685 }
686
687 void
688 selsnap(int mode, int *x, int *y, int direction) {
689 int i;
690
691 switch(mode) {
692 case SNAP_WORD:
693 /*
694 * Snap around if the word wraps around at the end or
695 * beginning of a line.
696 */
697 for(;;) {
698 if(direction < 0 && *x <= 0) {
699 if(*y > 0 && term.line[*y - 1][term.col-1].mode
700 & ATTR_WRAP) {
701 *y -= 1;
702 *x = term.col-1;
703 } else {
704 break;
705 }
706 }
707 if(direction > 0 && *x >= term.col-1) {
708 if(*y < term.row-1 && term.line[*y][*x].mode
709 & ATTR_WRAP) {
710 *y += 1;
711 *x = 0;
712 } else {
713 break;
714 }
715 }
716
717 if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
718 *x += direction;
719 continue;
720 }
721
722 if(strchr(worddelimiters,
723 term.line[*y][*x+direction].c[0])) {
724 break;
725 }
726
727 *x += direction;
728 }
729 break;
730 case SNAP_LINE:
731 /*
732 * Snap around if the the previous line or the current one
733 * has set ATTR_WRAP at its end. Then the whole next or
734 * previous line will be selected.
735 */
736 *x = (direction < 0) ? 0 : term.col - 1;
737 if(direction < 0 && *y > 0) {
738 for(; *y > 0; *y += direction) {
739 if(!(term.line[*y-1][term.col-1].mode
740 & ATTR_WRAP)) {
741 break;
742 }
743 }
744 } else if(direction > 0 && *y < term.row-1) {
745 for(; *y < term.row; *y += direction) {
746 if(!(term.line[*y][term.col-1].mode
747 & ATTR_WRAP)) {
748 break;
749 }
750 }
751 }
752 break;
753 default:
754 /*
755 * Select the whole line when the end of line is reached.
756 */
757 if(direction > 0) {
758 i = term.col;
759 while(--i > 0 && term.line[*y][i].c[0] == ' ')
760 /* nothing */;
761 if(i > 0 && i < *x)
762 *x = term.col - 1;
763 }
764 break;
765 }
766 }
767
768 void
769 getbuttoninfo(XEvent *e) {
770 int type;
771 uint state = e->xbutton.state &~Button1Mask;
772
773 sel.alt = IS_SET(MODE_ALTSCREEN);
774
775 sel.oe.x = x2col(e->xbutton.x);
776 sel.oe.y = y2row(e->xbutton.y);
777
778 if(sel.ob.y < sel.oe.y
779 || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
780 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
781 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
782 } else {
783 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
784 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
785 }
786 selsort();
787
788 sel.type = SEL_REGULAR;
789 for(type = 1; type < LEN(selmasks); ++type) {
790 if(match(selmasks[type], state)) {
791 sel.type = type;
792 break;
793 }
794 }
795 }
796
797 void
798 mousereport(XEvent *e) {
799 int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
800 button = e->xbutton.button, state = e->xbutton.state,
801 len;
802 char buf[40];
803 static int ox, oy;
804
805 /* from urxvt */
806 if(e->xbutton.type == MotionNotify) {
807 if(x == ox && y == oy)
808 return;
809 if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
810 return;
811 /* MOUSE_MOTION: no reporting if no button is pressed */
812 if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
813 return;
814
815 button = oldbutton + 32;
816 ox = x;
817 oy = y;
818 } else {
819 if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
820 button = 3;
821 } else {
822 button -= Button1;
823 if(button >= 3)
824 button += 64 - 3;
825 }
826 if(e->xbutton.type == ButtonPress) {
827 oldbutton = button;
828 ox = x;
829 oy = y;
830 } else if(e->xbutton.type == ButtonRelease) {
831 oldbutton = 3;
832 /* MODE_MOUSEX10: no button release reporting */
833 if(IS_SET(MODE_MOUSEX10))
834 return;
835 }
836 }
837
838 if(!IS_SET(MODE_MOUSEX10)) {
839 button += (state & ShiftMask ? 4 : 0)
840 + (state & Mod4Mask ? 8 : 0)
841 + (state & ControlMask ? 16 : 0);
842 }
843
844 len = 0;
845 if(IS_SET(MODE_MOUSESGR)) {
846 len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
847 button, x+1, y+1,
848 e->xbutton.type == ButtonRelease ? 'm' : 'M');
849 } else if(x < 223 && y < 223) {
850 len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
851 32+button, 32+x+1, 32+y+1);
852 } else {
853 return;
854 }
855
856 ttywrite(buf, len);
857 }
858
859 void
860 bpress(XEvent *e) {
861 struct timeval now;
862 Mousekey *mk;
863
864 if(IS_SET(MODE_MOUSE)) {
865 mousereport(e);
866 return;
867 }
868
869 for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
870 if(e->xbutton.button == mk->b
871 && match(mk->mask, e->xbutton.state)) {
872 ttysend(mk->s, strlen(mk->s));
873 return;
874 }
875 }
876
877 if(e->xbutton.button == Button1) {
878 gettimeofday(&now, NULL);
879
880 /* Clear previous selection, logically and visually. */
881 selclear(NULL);
882 sel.mode = 1;
883 sel.type = SEL_REGULAR;
884 sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
885 sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
886
887 /*
888 * If the user clicks below predefined timeouts specific
889 * snapping behaviour is exposed.
890 */
891 if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
892 sel.snap = SNAP_LINE;
893 } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
894 sel.snap = SNAP_WORD;
895 } else {
896 sel.snap = 0;
897 }
898 selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
899 selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
900 selsort();
901
902 /*
903 * Draw selection, unless it's regular and we don't want to
904 * make clicks visible
905 */
906 if(sel.snap != 0) {
907 sel.mode++;
908 tsetdirt(sel.nb.y, sel.ne.y);
909 }
910 sel.tclick2 = sel.tclick1;
911 sel.tclick1 = now;
912 }
913 }
914
915 char *
916 getsel(void) {
917 char *str, *ptr;
918 int x, y, bufsize, size, i, ex;
919 Glyph *gp, *last;
920
921 if(sel.ob.x == -1) {
922 str = NULL;
923 } else {
924 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
925 ptr = str = xmalloc(bufsize);
926
927 /* append every set & selected glyph to the selection */
928 for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
929 gp = &term.line[y][0];
930 last = &gp[term.col-1];
931
932 while(last >= gp && !(selected(last - gp, y) &&
933 strcmp(last->c, " ") != 0)) {
934 --last;
935 }
936
937 for(x = 0; gp <= last; x++, ++gp) {
938 if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
939 continue;
940
941 size = utf8len(gp->c);
942 memcpy(ptr, gp->c, size);
943 ptr += size;
944 }
945
946 /*
947 * Copy and pasting of line endings is inconsistent
948 * in the inconsistent terminal and GUI world.
949 * The best solution seems like to produce '\n' when
950 * something is copied from st and convert '\n' to
951 * '\r', when something to be pasted is received by
952 * st.
953 * FIXME: Fix the computer world.
954 */
955 if(y < sel.ne.y && x > 0 && !((gp-1)->mode & ATTR_WRAP))
956 *ptr++ = '\n';
957
958 /*
959 * If the last selected line expands in the selection
960 * after the visible text '\n' is appended.
961 */
962 if(y == sel.ne.y) {
963 i = term.col;
964 while(--i > 0 && term.line[y][i].c[0] == ' ')
965 /* nothing */;
966 ex = sel.ne.x;
967 if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
968 ex = sel.nb.x;
969 if(i < ex)
970 *ptr++ = '\n';
971 }
972 }
973 *ptr = 0;
974 }
975 return str;
976 }
977
978 void
979 selcopy(void) {
980 xsetsel(getsel());
981 }
982
983 void
984 selnotify(XEvent *e) {
985 ulong nitems, ofs, rem;
986 int format;
987 uchar *data, *last, *repl;
988 Atom type;
989
990 ofs = 0;
991 do {
992 if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
993 False, AnyPropertyType, &type, &format,
994 &nitems, &rem, &data)) {
995 fprintf(stderr, "Clipboard allocation failed\n");
996 return;
997 }
998
999 /*
1000 * As seen in getsel:
1001 * Line endings are inconsistent in the terminal and GUI world
1002 * copy and pasting. When receiving some selection data,
1003 * replace all '\n' with '\r'.
1004 * FIXME: Fix the computer world.
1005 */
1006 repl = data;
1007 last = data + nitems * format / 8;
1008 while((repl = memchr(repl, '\n', last - repl))) {
1009 *repl++ = '\r';
1010 }
1011
1012 if(IS_SET(MODE_BRCKTPASTE))
1013 ttywrite("\033[200~", 6);
1014 ttysend((char *)data, nitems * format / 8);
1015 if(IS_SET(MODE_BRCKTPASTE))
1016 ttywrite("\033[201~", 6);
1017 XFree(data);
1018 /* number of 32-bit chunks returned */
1019 ofs += nitems * format / 32;
1020 } while(rem > 0);
1021 }
1022
1023 void
1024 selpaste(const Arg *dummy) {
1025 XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
1026 xw.win, CurrentTime);
1027 }
1028
1029 void
1030 clippaste(const Arg *dummy) {
1031 Atom clipboard;
1032
1033 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1034 XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
1035 xw.win, CurrentTime);
1036 }
1037
1038 void
1039 selclear(XEvent *e) {
1040 if(sel.ob.x == -1)
1041 return;
1042 sel.ob.x = -1;
1043 tsetdirt(sel.nb.y, sel.ne.y);
1044 }
1045
1046 void
1047 selrequest(XEvent *e) {
1048 XSelectionRequestEvent *xsre;
1049 XSelectionEvent xev;
1050 Atom xa_targets, string;
1051
1052 xsre = (XSelectionRequestEvent *) e;
1053 xev.type = SelectionNotify;
1054 xev.requestor = xsre->requestor;
1055 xev.selection = xsre->selection;
1056 xev.target = xsre->target;
1057 xev.time = xsre->time;
1058 /* reject */
1059 xev.property = None;
1060
1061 xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
1062 if(xsre->target == xa_targets) {
1063 /* respond with the supported type */
1064 string = sel.xtarget;
1065 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1066 XA_ATOM, 32, PropModeReplace,
1067 (uchar *) &string, 1);
1068 xev.property = xsre->property;
1069 } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
1070 XChangeProperty(xsre->display, xsre->requestor, xsre->property,
1071 xsre->target, 8, PropModeReplace,
1072 (uchar *) sel.clip, strlen(sel.clip));
1073 xev.property = xsre->property;
1074 }
1075
1076 /* all done, send a notification to the listener */
1077 if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
1078 fprintf(stderr, "Error sending SelectionNotify event\n");
1079 }
1080
1081 void
1082 xsetsel(char *str) {
1083 /* register the selection for both the clipboard and the primary */
1084 Atom clipboard;
1085
1086 free(sel.clip);
1087 sel.clip = str;
1088
1089 XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
1090
1091 clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
1092 XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
1093 }
1094
1095 void
1096 brelease(XEvent *e) {
1097 if(IS_SET(MODE_MOUSE)) {
1098 mousereport(e);
1099 return;
1100 }
1101
1102 if(e->xbutton.button == Button2) {
1103 selpaste(NULL);
1104 } else if(e->xbutton.button == Button1) {
1105 if(sel.mode < 2) {
1106 selclear(NULL);
1107 } else {
1108 getbuttoninfo(e);
1109 selcopy();
1110 }
1111 sel.mode = 0;
1112 tsetdirt(sel.nb.y, sel.ne.y);
1113 }
1114 }
1115
1116 void
1117 bmotion(XEvent *e) {
1118 int oldey, oldex, oldsby, oldsey;
1119
1120 if(IS_SET(MODE_MOUSE)) {
1121 mousereport(e);
1122 return;
1123 }
1124
1125 if(!sel.mode)
1126 return;
1127
1128 sel.mode++;
1129 oldey = sel.oe.y;
1130 oldex = sel.oe.x;
1131 oldsby = sel.nb.y;
1132 oldsey = sel.ne.y;
1133 getbuttoninfo(e);
1134
1135 if(oldey != sel.oe.y || oldex != sel.oe.x)
1136 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
1137 }
1138
1139 void
1140 die(const char *errstr, ...) {
1141 va_list ap;
1142
1143 va_start(ap, errstr);
1144 vfprintf(stderr, errstr, ap);
1145 va_end(ap);
1146 exit(EXIT_FAILURE);
1147 }
1148
1149 void
1150 execsh(void) {
1151 char **args;
1152 char *envshell = getenv("SHELL");
1153 const struct passwd *pass = getpwuid(getuid());
1154 char buf[sizeof(long) * 8 + 1];
1155
1156 unsetenv("COLUMNS");
1157 unsetenv("LINES");
1158 unsetenv("TERMCAP");
1159
1160 if(pass) {
1161 setenv("LOGNAME", pass->pw_name, 1);
1162 setenv("USER", pass->pw_name, 1);
1163 setenv("SHELL", pass->pw_shell, 0);
1164 setenv("HOME", pass->pw_dir, 0);
1165 }
1166
1167 snprintf(buf, sizeof(buf), "%lu", xw.win);
1168 setenv("WINDOWID", buf, 1);
1169
1170 signal(SIGCHLD, SIG_DFL);
1171 signal(SIGHUP, SIG_DFL);
1172 signal(SIGINT, SIG_DFL);
1173 signal(SIGQUIT, SIG_DFL);
1174 signal(SIGTERM, SIG_DFL);
1175 signal(SIGALRM, SIG_DFL);
1176
1177 DEFAULT(envshell, shell);
1178 setenv("TERM", termname, 1);
1179 args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
1180 execvp(args[0], args);
1181 exit(EXIT_FAILURE);
1182 }
1183
1184 void
1185 sigchld(int a) {
1186 int stat = 0;
1187
1188 if(waitpid(pid, &stat, 0) < 0)
1189 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
1190
1191 if(WIFEXITED(stat)) {
1192 exit(WEXITSTATUS(stat));
1193 } else {
1194 exit(EXIT_FAILURE);
1195 }
1196 }
1197
1198 void
1199 ttynew(void) {
1200 int m, s;
1201 struct winsize w = {term.row, term.col, 0, 0};
1202
1203 /* seems to work fine on linux, openbsd and freebsd */
1204 if(openpty(&m, &s, NULL, NULL, &w) < 0)
1205 die("openpty failed: %s\n", strerror(errno));
1206
1207 switch(pid = fork()) {
1208 case -1:
1209 die("fork failed\n");
1210 break;
1211 case 0:
1212 setsid(); /* create a new process group */
1213 dup2(s, STDIN_FILENO);
1214 dup2(s, STDOUT_FILENO);
1215 dup2(s, STDERR_FILENO);
1216 if(ioctl(s, TIOCSCTTY, NULL) < 0)
1217 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
1218 close(s);
1219 close(m);
1220 execsh();
1221 break;
1222 default:
1223 close(s);
1224 cmdfd = m;
1225 signal(SIGCHLD, sigchld);
1226 if(opt_io) {
1227 term.mode |= MODE_PRINT;
1228 iofd = (!strcmp(opt_io, "-")) ?
1229 STDOUT_FILENO :
1230 open(opt_io, O_WRONLY | O_CREAT, 0666);
1231 if(iofd < 0) {
1232 fprintf(stderr, "Error opening %s:%s\n",
1233 opt_io, strerror(errno));
1234 }
1235 }
1236 break;
1237 }
1238 }
1239
1240 void
1241 dump(char c) {
1242 static int col;
1243
1244 fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
1245 if(++col % 10 == 0)
1246 fprintf(stderr, "\n");
1247 }
1248
1249 void
1250 ttyread(void) {
1251 static char buf[BUFSIZ];
1252 static int buflen = 0;
1253 char *ptr;
1254 char s[UTF_SIZ];
1255 int charsize; /* size of utf8 char in bytes */
1256 long unicodep;
1257 int ret;
1258
1259 /* append read bytes to unprocessed bytes */
1260 if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
1261 die("Couldn't read from shell: %s\n", strerror(errno));
1262
1263 /* process every complete utf8 char */
1264 buflen += ret;
1265 ptr = buf;
1266 while((charsize = utf8decode(ptr, &unicodep, buflen))) {
1267 utf8encode(unicodep, s, UTF_SIZ);
1268 tputc(s, charsize);
1269 ptr += charsize;
1270 buflen -= charsize;
1271 }
1272
1273 /* keep any uncomplete utf8 char for the next call */
1274 memmove(buf, ptr, buflen);
1275 }
1276
1277 void
1278 ttywrite(const char *s, size_t n) {
1279 if(xwrite(cmdfd, s, n) == -1)
1280 die("write error on tty: %s\n", strerror(errno));
1281 }
1282
1283 void
1284 ttysend(char *s, size_t n) {
1285 ttywrite(s, n);
1286 if(IS_SET(MODE_ECHO))
1287 techo(s, n);
1288 }
1289
1290 void
1291 ttyresize(void) {
1292 struct winsize w;
1293
1294 w.ws_row = term.row;
1295 w.ws_col = term.col;
1296 w.ws_xpixel = xw.tw;
1297 w.ws_ypixel = xw.th;
1298 if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
1299 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
1300 }
1301
1302 int
1303 tattrset(int attr) {
1304 int i, j;
1305
1306 for(i = 0; i < term.row-1; i++) {
1307 for(j = 0; j < term.col-1; j++) {
1308 if(term.line[i][j].mode & attr)
1309 return 1;
1310 }
1311 }
1312
1313 return 0;
1314 }
1315
1316 void
1317 tsetdirt(int top, int bot) {
1318 int i;
1319
1320 LIMIT(top, 0, term.row-1);
1321 LIMIT(bot, 0, term.row-1);
1322
1323 for(i = top; i <= bot; i++)
1324 term.dirty[i] = 1;
1325 }
1326
1327 void
1328 tsetdirtattr(int attr) {
1329 int i, j;
1330
1331 for(i = 0; i < term.row-1; i++) {
1332 for(j = 0; j < term.col-1; j++) {
1333 if(term.line[i][j].mode & attr) {
1334 tsetdirt(i, i);
1335 break;
1336 }
1337 }
1338 }
1339 }
1340
1341 void
1342 tfulldirt(void) {
1343 tsetdirt(0, term.row-1);
1344 }
1345
1346 void
1347 tcursor(int mode) {
1348 static TCursor c[2];
1349 bool alt = IS_SET(MODE_ALTSCREEN);
1350
1351 if(mode == CURSOR_SAVE) {
1352 c[alt] = term.c;
1353 } else if(mode == CURSOR_LOAD) {
1354 term.c = c[alt];
1355 tmoveto(c[alt].x, c[alt].y);
1356 }
1357 }
1358
1359 void
1360 treset(void) {
1361 uint i;
1362
1363 term.c = (TCursor){{
1364 .mode = ATTR_NULL,
1365 .fg = defaultfg,
1366 .bg = defaultbg
1367 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1368
1369 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1370 for(i = tabspaces; i < term.col; i += tabspaces)
1371 term.tabs[i] = 1;
1372 term.top = 0;
1373 term.bot = term.row - 1;
1374 term.mode = MODE_WRAP;
1375 memset(term.trantbl, sizeof(term.trantbl), CS_USA);
1376 term.charset = 0;
1377
1378 tclearregion(0, 0, term.col-1, term.row-1);
1379 tmoveto(0, 0);
1380 tcursor(CURSOR_SAVE);
1381 }
1382
1383 void
1384 tnew(int col, int row) {
1385 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1386 tresize(col, row);
1387 term.numlock = 1;
1388
1389 treset();
1390 }
1391
1392 void
1393 tswapscreen(void) {
1394 Line *tmp = term.line;
1395
1396 term.line = term.alt;
1397 term.alt = tmp;
1398 term.mode ^= MODE_ALTSCREEN;
1399 tfulldirt();
1400 }
1401
1402 void
1403 tscrolldown(int orig, int n) {
1404 int i;
1405 Line temp;
1406
1407 LIMIT(n, 0, term.bot-orig+1);
1408
1409 tsetdirt(orig, term.bot-n);
1410 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1411
1412 for(i = term.bot; i >= orig+n; i--) {
1413 temp = term.line[i];
1414 term.line[i] = term.line[i-n];
1415 term.line[i-n] = temp;
1416 }
1417
1418 selscroll(orig, n);
1419 }
1420
1421 void
1422 tscrollup(int orig, int n) {
1423 int i;
1424 Line temp;
1425
1426 LIMIT(n, 0, term.bot-orig+1);
1427
1428 tclearregion(0, orig, term.col-1, orig+n-1);
1429 tsetdirt(orig+n, term.bot);
1430
1431 for(i = orig; i <= term.bot-n; i++) {
1432 temp = term.line[i];
1433 term.line[i] = term.line[i+n];
1434 term.line[i+n] = temp;
1435 }
1436
1437 selscroll(orig, -n);
1438 }
1439
1440 void
1441 selscroll(int orig, int n) {
1442 if(sel.ob.x == -1)
1443 return;
1444
1445 if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1446 if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1447 selclear(NULL);
1448 return;
1449 }
1450 if(sel.type == SEL_RECTANGULAR) {
1451 if(sel.ob.y < term.top)
1452 sel.ob.y = term.top;
1453 if(sel.oe.y > term.bot)
1454 sel.oe.y = term.bot;
1455 } else {
1456 if(sel.ob.y < term.top) {
1457 sel.ob.y = term.top;
1458 sel.ob.x = 0;
1459 }
1460 if(sel.oe.y > term.bot) {
1461 sel.oe.y = term.bot;
1462 sel.oe.x = term.col;
1463 }
1464 }
1465 selsort();
1466 }
1467 }
1468
1469 void
1470 tnewline(int first_col) {
1471 int y = term.c.y;
1472
1473 if(y == term.bot) {
1474 tscrollup(term.top, 1);
1475 } else {
1476 y++;
1477 }
1478 tmoveto(first_col ? 0 : term.c.x, y);
1479 }
1480
1481 void
1482 csiparse(void) {
1483 char *p = csiescseq.buf, *np;
1484 long int v;
1485
1486 csiescseq.narg = 0;
1487 if(*p == '?') {
1488 csiescseq.priv = 1;
1489 p++;
1490 }
1491
1492 csiescseq.buf[csiescseq.len] = '\0';
1493 while(p < csiescseq.buf+csiescseq.len) {
1494 np = NULL;
1495 v = strtol(p, &np, 10);
1496 if(np == p)
1497 v = 0;
1498 if(v == LONG_MAX || v == LONG_MIN)
1499 v = -1;
1500 csiescseq.arg[csiescseq.narg++] = v;
1501 p = np;
1502 if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1503 break;
1504 p++;
1505 }
1506 csiescseq.mode = *p;
1507 }
1508
1509 /* for absolute user moves, when decom is set */
1510 void
1511 tmoveato(int x, int y) {
1512 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1513 }
1514
1515 void
1516 tmoveto(int x, int y) {
1517 int miny, maxy;
1518
1519 if(term.c.state & CURSOR_ORIGIN) {
1520 miny = term.top;
1521 maxy = term.bot;
1522 } else {
1523 miny = 0;
1524 maxy = term.row - 1;
1525 }
1526 LIMIT(x, 0, term.col-1);
1527 LIMIT(y, miny, maxy);
1528 term.c.state &= ~CURSOR_WRAPNEXT;
1529 term.c.x = x;
1530 term.c.y = y;
1531 }
1532
1533 void
1534 tsetchar(char *c, Glyph *attr, int x, int y) {
1535 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1536 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1537 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1538 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1539 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1540 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1541 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1542 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1543 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1544 };
1545
1546 /*
1547 * The table is proudly stolen from rxvt.
1548 */
1549 if(attr->mode & ATTR_GFX) {
1550 if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
1551 c = vt100_0[c[0] - 0x41];
1552 }
1553 }
1554
1555 if(term.line[y][x].mode & ATTR_WIDE) {
1556 if(x+1 < term.col) {
1557 term.line[y][x+1].c[0] = ' ';
1558 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1559 }
1560 } else if(term.line[y][x].mode & ATTR_WDUMMY) {
1561 term.line[y][x-1].c[0] = ' ';
1562 term.line[y][x-1].mode &= ~ATTR_WIDE;
1563 }
1564
1565 term.dirty[y] = 1;
1566 term.line[y][x] = *attr;
1567 memcpy(term.line[y][x].c, c, UTF_SIZ);
1568 }
1569
1570 void
1571 tclearregion(int x1, int y1, int x2, int y2) {
1572 int x, y, temp;
1573
1574 if(x1 > x2)
1575 temp = x1, x1 = x2, x2 = temp;
1576 if(y1 > y2)
1577 temp = y1, y1 = y2, y2 = temp;
1578
1579 LIMIT(x1, 0, term.col-1);
1580 LIMIT(x2, 0, term.col-1);
1581 LIMIT(y1, 0, term.row-1);
1582 LIMIT(y2, 0, term.row-1);
1583
1584 for(y = y1; y <= y2; y++) {
1585 term.dirty[y] = 1;
1586 for(x = x1; x <= x2; x++) {
1587 if(selected(x, y))
1588 selclear(NULL);
1589 term.line[y][x] = term.c.attr;
1590 memcpy(term.line[y][x].c, " ", 2);
1591 }
1592 }
1593 }
1594
1595 void
1596 tdeletechar(int n) {
1597 int dst, src, size;
1598 Glyph *line;
1599
1600 LIMIT(n, 0, term.col - term.c.x);
1601
1602 dst = term.c.x;
1603 src = term.c.x + n;
1604 size = term.col - src;
1605 line = term.line[term.c.y];
1606
1607 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1608 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1609 }
1610
1611 void
1612 tinsertblank(int n) {
1613 int dst, src, size;
1614 Glyph *line;
1615
1616 LIMIT(n, 0, term.col - term.c.x);
1617
1618 dst = term.c.x + n;
1619 src = term.c.x;
1620 size = term.col - dst;
1621 line = term.line[term.c.y];
1622
1623 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1624 tclearregion(src, term.c.y, dst - 1, term.c.y);
1625 }
1626
1627 void
1628 tinsertblankline(int n) {
1629 if(BETWEEN(term.c.y, term.top, term.bot))
1630 tscrolldown(term.c.y, n);
1631 }
1632
1633 void
1634 tdeleteline(int n) {
1635 if(BETWEEN(term.c.y, term.top, term.bot))
1636 tscrollup(term.c.y, n);
1637 }
1638
1639 int32_t
1640 tdefcolor(int *attr, int *npar, int l) {
1641 int32_t idx = -1;
1642 uint r, g, b;
1643
1644 switch (attr[*npar + 1]) {
1645 case 2: /* direct colour in RGB space */
1646 if (*npar + 4 >= l) {
1647 fprintf(stderr,
1648 "erresc(38): Incorrect number of parameters (%d)\n",
1649 *npar);
1650 break;
1651 }
1652 r = attr[*npar + 2];
1653 g = attr[*npar + 3];
1654 b = attr[*npar + 4];
1655 *npar += 4;
1656 if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1657 fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
1658 r, g, b);
1659 else
1660 idx = TRUECOLOR(r, g, b);
1661 break;
1662 case 5: /* indexed colour */
1663 if (*npar + 2 >= l) {
1664 fprintf(stderr,
1665 "erresc(38): Incorrect number of parameters (%d)\n",
1666 *npar);
1667 break;
1668 }
1669 *npar += 2;
1670 if(!BETWEEN(attr[*npar], 0, 255))
1671 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1672 else
1673 idx = attr[*npar];
1674 break;
1675 case 0: /* implemented defined (only foreground) */
1676 case 1: /* transparent */
1677 case 3: /* direct colour in CMY space */
1678 case 4: /* direct colour in CMYK space */
1679 default:
1680 fprintf(stderr,
1681 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1682 break;
1683 }
1684
1685 return idx;
1686 }
1687
1688 void
1689 tsetattr(int *attr, int l) {
1690 int i;
1691 int32_t idx;
1692
1693 for(i = 0; i < l; i++) {
1694 switch(attr[i]) {
1695 case 0:
1696 term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE \
1697 | ATTR_BOLD | ATTR_ITALIC \
1698 | ATTR_BLINK);
1699 term.c.attr.fg = defaultfg;
1700 term.c.attr.bg = defaultbg;
1701 break;
1702 case 1:
1703 term.c.attr.mode |= ATTR_BOLD;
1704 break;
1705 case 3:
1706 term.c.attr.mode |= ATTR_ITALIC;
1707 break;
1708 case 4:
1709 term.c.attr.mode |= ATTR_UNDERLINE;
1710 break;
1711 case 5: /* slow blink */
1712 case 6: /* rapid blink */
1713 term.c.attr.mode |= ATTR_BLINK;
1714 break;
1715 case 7:
1716 term.c.attr.mode |= ATTR_REVERSE;
1717 break;
1718 case 21:
1719 case 22:
1720 term.c.attr.mode &= ~ATTR_BOLD;
1721 break;
1722 case 23:
1723 term.c.attr.mode &= ~ATTR_ITALIC;
1724 break;
1725 case 24:
1726 term.c.attr.mode &= ~ATTR_UNDERLINE;
1727 break;
1728 case 25:
1729 case 26:
1730 term.c.attr.mode &= ~ATTR_BLINK;
1731 break;
1732 case 27:
1733 term.c.attr.mode &= ~ATTR_REVERSE;
1734 break;
1735 case 38:
1736 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1737 term.c.attr.fg = idx;
1738 break;
1739 case 39:
1740 term.c.attr.fg = defaultfg;
1741 break;
1742 case 48:
1743 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1744 term.c.attr.bg = idx;
1745 break;
1746 case 49:
1747 term.c.attr.bg = defaultbg;
1748 break;
1749 default:
1750 if(BETWEEN(attr[i], 30, 37)) {
1751 term.c.attr.fg = attr[i] - 30;
1752 } else if(BETWEEN(attr[i], 40, 47)) {
1753 term.c.attr.bg = attr[i] - 40;
1754 } else if(BETWEEN(attr[i], 90, 97)) {
1755 term.c.attr.fg = attr[i] - 90 + 8;
1756 } else if(BETWEEN(attr[i], 100, 107)) {
1757 term.c.attr.bg = attr[i] - 100 + 8;
1758 } else {
1759 fprintf(stderr,
1760 "erresc(default): gfx attr %d unknown\n",
1761 attr[i]), csidump();
1762 }
1763 break;
1764 }
1765 }
1766 }
1767
1768 void
1769 tsetscroll(int t, int b) {
1770 int temp;
1771
1772 LIMIT(t, 0, term.row-1);
1773 LIMIT(b, 0, term.row-1);
1774 if(t > b) {
1775 temp = t;
1776 t = b;
1777 b = temp;
1778 }
1779 term.top = t;
1780 term.bot = b;
1781 }
1782
1783 void
1784 tsetmode(bool priv, bool set, int *args, int narg) {
1785 int *lim, mode;
1786 bool alt;
1787
1788 for(lim = args + narg; args < lim; ++args) {
1789 if(priv) {
1790 switch(*args) {
1791 case 1: /* DECCKM -- Cursor key */
1792 MODBIT(term.mode, set, MODE_APPCURSOR);
1793 break;
1794 case 5: /* DECSCNM -- Reverse video */
1795 mode = term.mode;
1796 MODBIT(term.mode, set, MODE_REVERSE);
1797 if(mode != term.mode)
1798 redraw(REDRAW_TIMEOUT);
1799 break;
1800 case 6: /* DECOM -- Origin */
1801 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1802 tmoveato(0, 0);
1803 break;
1804 case 7: /* DECAWM -- Auto wrap */
1805 MODBIT(term.mode, set, MODE_WRAP);
1806 break;
1807 case 0: /* Error (IGNORED) */
1808 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1809 case 3: /* DECCOLM -- Column (IGNORED) */
1810 case 4: /* DECSCLM -- Scroll (IGNORED) */
1811 case 8: /* DECARM -- Auto repeat (IGNORED) */
1812 case 18: /* DECPFF -- Printer feed (IGNORED) */
1813 case 19: /* DECPEX -- Printer extent (IGNORED) */
1814 case 42: /* DECNRCM -- National characters (IGNORED) */
1815 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1816 break;
1817 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1818 MODBIT(term.mode, !set, MODE_HIDE);
1819 break;
1820 case 9: /* X10 mouse compatibility mode */
1821 xsetpointermotion(0);
1822 MODBIT(term.mode, 0, MODE_MOUSE);
1823 MODBIT(term.mode, set, MODE_MOUSEX10);
1824 break;
1825 case 1000: /* 1000: report button press */
1826 xsetpointermotion(0);
1827 MODBIT(term.mode, 0, MODE_MOUSE);
1828 MODBIT(term.mode, set, MODE_MOUSEBTN);
1829 break;
1830 case 1002: /* 1002: report motion on button press */
1831 xsetpointermotion(0);
1832 MODBIT(term.mode, 0, MODE_MOUSE);
1833 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1834 break;
1835 case 1003: /* 1003: enable all mouse motions */
1836 xsetpointermotion(set);
1837 MODBIT(term.mode, 0, MODE_MOUSE);
1838 MODBIT(term.mode, set, MODE_MOUSEMANY);
1839 break;
1840 case 1004: /* 1004: send focus events to tty */
1841 MODBIT(term.mode, set, MODE_FOCUS);
1842 break;
1843 case 1006: /* 1006: extended reporting mode */
1844 MODBIT(term.mode, set, MODE_MOUSESGR);
1845 break;
1846 case 1034:
1847 MODBIT(term.mode, set, MODE_8BIT);
1848 break;
1849 case 1049: /* swap screen & set/restore cursor as xterm */
1850 if (!allowaltscreen)
1851 break;
1852 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1853 /* FALLTHRU */
1854 case 47: /* swap screen */
1855 case 1047:
1856 if (!allowaltscreen)
1857 break;
1858 alt = IS_SET(MODE_ALTSCREEN);
1859 if(alt) {
1860 tclearregion(0, 0, term.col-1,
1861 term.row-1);
1862 }
1863 if(set ^ alt) /* set is always 1 or 0 */
1864 tswapscreen();
1865 if(*args != 1049)
1866 break;
1867 /* FALLTRU */
1868 case 1048:
1869 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1870 break;
1871 case 2004: /* 2004: bracketed paste mode */
1872 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1873 break;
1874 /* Not implemented mouse modes. See comments there. */
1875 case 1001: /* mouse highlight mode; can hang the
1876 terminal by design when implemented. */
1877 case 1005: /* UTF-8 mouse mode; will confuse
1878 applications not supporting UTF-8
1879 and luit. */
1880 case 1015: /* urxvt mangled mouse mode; incompatible
1881 and can be mistaken for other control
1882 codes. */
1883 default:
1884 fprintf(stderr,
1885 "erresc: unknown private set/reset mode %d\n",
1886 *args);
1887 break;
1888 }
1889 } else {
1890 switch(*args) {
1891 case 0: /* Error (IGNORED) */
1892 break;
1893 case 2: /* KAM -- keyboard action */
1894 MODBIT(term.mode, set, MODE_KBDLOCK);
1895 break;
1896 case 4: /* IRM -- Insertion-replacement */
1897 MODBIT(term.mode, set, MODE_INSERT);
1898 break;
1899 case 12: /* SRM -- Send/Receive */
1900 MODBIT(term.mode, !set, MODE_ECHO);
1901 break;
1902 case 20: /* LNM -- Linefeed/new line */
1903 MODBIT(term.mode, set, MODE_CRLF);
1904 break;
1905 default:
1906 fprintf(stderr,
1907 "erresc: unknown set/reset mode %d\n",
1908 *args);
1909 break;
1910 }
1911 }
1912 }
1913 }
1914
1915 void
1916 csihandle(void) {
1917 char buf[40];
1918 int len;
1919
1920 switch(csiescseq.mode) {
1921 default:
1922 unknown:
1923 fprintf(stderr, "erresc: unknown csi ");
1924 csidump();
1925 /* die(""); */
1926 break;
1927 case '@': /* ICH -- Insert <n> blank char */
1928 DEFAULT(csiescseq.arg[0], 1);
1929 tinsertblank(csiescseq.arg[0]);
1930 break;
1931 case 'A': /* CUU -- Cursor <n> Up */
1932 DEFAULT(csiescseq.arg[0], 1);
1933 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1934 break;
1935 case 'B': /* CUD -- Cursor <n> Down */
1936 case 'e': /* VPR --Cursor <n> Down */
1937 DEFAULT(csiescseq.arg[0], 1);
1938 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1939 break;
1940 case 'i': /* MC -- Media Copy */
1941 switch(csiescseq.arg[0]) {
1942 case 0:
1943 tdump();
1944 break;
1945 case 1:
1946 tdumpline(term.c.y);
1947 break;
1948 case 2:
1949 tdumpsel();
1950 break;
1951 case 4:
1952 term.mode &= ~MODE_PRINT;
1953 break;
1954 case 5:
1955 term.mode |= MODE_PRINT;
1956 break;
1957 }
1958 break;
1959 case 'c': /* DA -- Device Attributes */
1960 if(csiescseq.arg[0] == 0)
1961 ttywrite(VT102ID, sizeof(VT102ID) - 1);
1962 break;
1963 case 'C': /* CUF -- Cursor <n> Forward */
1964 case 'a': /* HPR -- Cursor <n> Forward */
1965 DEFAULT(csiescseq.arg[0], 1);
1966 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1967 break;
1968 case 'D': /* CUB -- Cursor <n> Backward */
1969 DEFAULT(csiescseq.arg[0], 1);
1970 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1971 break;
1972 case 'E': /* CNL -- Cursor <n> Down and first col */
1973 DEFAULT(csiescseq.arg[0], 1);
1974 tmoveto(0, term.c.y+csiescseq.arg[0]);
1975 break;
1976 case 'F': /* CPL -- Cursor <n> Up and first col */
1977 DEFAULT(csiescseq.arg[0], 1);
1978 tmoveto(0, term.c.y-csiescseq.arg[0]);
1979 break;
1980 case 'g': /* TBC -- Tabulation clear */
1981 switch(csiescseq.arg[0]) {
1982 case 0: /* clear current tab stop */
1983 term.tabs[term.c.x] = 0;
1984 break;
1985 case 3: /* clear all the tabs */
1986 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1987 break;
1988 default:
1989 goto unknown;
1990 }
1991 break;
1992 case 'G': /* CHA -- Move to <col> */
1993 case '`': /* HPA */
1994 DEFAULT(csiescseq.arg[0], 1);
1995 tmoveto(csiescseq.arg[0]-1, term.c.y);
1996 break;
1997 case 'H': /* CUP -- Move to <row> <col> */
1998 case 'f': /* HVP */
1999 DEFAULT(csiescseq.arg[0], 1);
2000 DEFAULT(csiescseq.arg[1], 1);
2001 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
2002 break;
2003 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
2004 DEFAULT(csiescseq.arg[0], 1);
2005 tputtab(csiescseq.arg[0]);
2006 break;
2007 case 'J': /* ED -- Clear screen */
2008 selclear(NULL);
2009 switch(csiescseq.arg[0]) {
2010 case 0: /* below */
2011 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
2012 if(term.c.y < term.row-1) {
2013 tclearregion(0, term.c.y+1, term.col-1,
2014 term.row-1);
2015 }
2016 break;
2017 case 1: /* above */
2018 if(term.c.y > 1)
2019 tclearregion(0, 0, term.col-1, term.c.y-1);
2020 tclearregion(0, term.c.y, term.c.x, term.c.y);
2021 break;
2022 case 2: /* all */
2023 tclearregion(0, 0, term.col-1, term.row-1);
2024 break;
2025 default:
2026 goto unknown;
2027 }
2028 break;
2029 case 'K': /* EL -- Clear line */
2030 switch(csiescseq.arg[0]) {
2031 case 0: /* right */
2032 tclearregion(term.c.x, term.c.y, term.col-1,
2033 term.c.y);
2034 break;
2035 case 1: /* left */
2036 tclearregion(0, term.c.y, term.c.x, term.c.y);
2037 break;
2038 case 2: /* all */
2039 tclearregion(0, term.c.y, term.col-1, term.c.y);
2040 break;
2041 }
2042 break;
2043 case 'S': /* SU -- Scroll <n> line up */
2044 DEFAULT(csiescseq.arg[0], 1);
2045 tscrollup(term.top, csiescseq.arg[0]);
2046 break;
2047 case 'T': /* SD -- Scroll <n> line down */
2048 DEFAULT(csiescseq.arg[0], 1);
2049 tscrolldown(term.top, csiescseq.arg[0]);
2050 break;
2051 case 'L': /* IL -- Insert <n> blank lines */
2052 DEFAULT(csiescseq.arg[0], 1);
2053 tinsertblankline(csiescseq.arg[0]);
2054 break;
2055 case 'l': /* RM -- Reset Mode */
2056 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
2057 break;
2058 case 'M': /* DL -- Delete <n> lines */
2059 DEFAULT(csiescseq.arg[0], 1);
2060 tdeleteline(csiescseq.arg[0]);
2061 break;
2062 case 'X': /* ECH -- Erase <n> char */
2063 DEFAULT(csiescseq.arg[0], 1);
2064 tclearregion(term.c.x, term.c.y,
2065 term.c.x + csiescseq.arg[0] - 1, term.c.y);
2066 break;
2067 case 'P': /* DCH -- Delete <n> char */
2068 DEFAULT(csiescseq.arg[0], 1);
2069 tdeletechar(csiescseq.arg[0]);
2070 break;
2071 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
2072 DEFAULT(csiescseq.arg[0], 1);
2073 tputtab(-csiescseq.arg[0]);
2074 break;
2075 case 'd': /* VPA -- Move to <row> */
2076 DEFAULT(csiescseq.arg[0], 1);
2077 tmoveato(term.c.x, csiescseq.arg[0]-1);
2078 break;
2079 case 'h': /* SM -- Set terminal mode */
2080 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
2081 break;
2082 case 'm': /* SGR -- Terminal attribute (color) */
2083 tsetattr(csiescseq.arg, csiescseq.narg);
2084 break;
2085 case 'n': /* DSR – Device Status Report (cursor position) */
2086 if (csiescseq.arg[0] == 6) {
2087 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
2088 term.c.y+1, term.c.x+1);
2089 ttywrite(buf, len);
2090 break;
2091 }
2092 case 'r': /* DECSTBM -- Set Scrolling Region */
2093 if(csiescseq.priv) {
2094 goto unknown;
2095 } else {
2096 DEFAULT(csiescseq.arg[0], 1);
2097 DEFAULT(csiescseq.arg[1], term.row);
2098 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
2099 tmoveato(0, 0);
2100 }
2101 break;
2102 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
2103 tcursor(CURSOR_SAVE);
2104 break;
2105 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
2106 tcursor(CURSOR_LOAD);
2107 break;
2108 }
2109 }
2110
2111 void
2112 csidump(void) {
2113 int i;
2114 uint c;
2115
2116 printf("ESC[");
2117 for(i = 0; i < csiescseq.len; i++) {
2118 c = csiescseq.buf[i] & 0xff;
2119 if(isprint(c)) {
2120 putchar(c);
2121 } else if(c == '\n') {
2122 printf("(\\n)");
2123 } else if(c == '\r') {
2124 printf("(\\r)");
2125 } else if(c == 0x1b) {
2126 printf("(\\e)");
2127 } else {
2128 printf("(%02x)", c);
2129 }
2130 }
2131 putchar('\n');
2132 }
2133
2134 void
2135 csireset(void) {
2136 memset(&csiescseq, 0, sizeof(csiescseq));
2137 }
2138
2139 void
2140 strhandle(void) {
2141 char *p = NULL;
2142 int j, narg, par;
2143
2144 term.esc &= ~(ESC_STR_END|ESC_STR);
2145 strparse();
2146 narg = strescseq.narg;
2147 par = atoi(strescseq.args[0]);
2148
2149 switch(strescseq.type) {
2150 case ']': /* OSC -- Operating System Command */
2151 switch(par) {
2152 case 0:
2153 case 1:
2154 case 2:
2155 if(narg > 1)
2156 xsettitle(strescseq.args[1]);
2157 return;
2158 case 4: /* color set */
2159 if(narg < 3)
2160 break;
2161 p = strescseq.args[2];
2162 /* fall through */
2163 case 104: /* color reset, here p = NULL */
2164 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
2165 if (!xsetcolorname(j, p)) {
2166 fprintf(stderr, "erresc: invalid color %s\n", p);
2167 } else {
2168 /*
2169 * TODO if defaultbg color is changed, borders
2170 * are dirty
2171 */
2172 redraw(0);
2173 }
2174 return;
2175 }
2176 break;
2177 case 'k': /* old title set compatibility */
2178 xsettitle(strescseq.args[0]);
2179 return;
2180 case 'P': /* DCS -- Device Control String */
2181 case '_': /* APC -- Application Program Command */
2182 case '^': /* PM -- Privacy Message */
2183 return;
2184 }
2185
2186 fprintf(stderr, "erresc: unknown str ");
2187 strdump();
2188 }
2189
2190 void
2191 strparse(void) {
2192 char *p = strescseq.buf;
2193
2194 strescseq.narg = 0;
2195 strescseq.buf[strescseq.len] = '\0';
2196 while(p && strescseq.narg < STR_ARG_SIZ)
2197 strescseq.args[strescseq.narg++] = strsep(&p, ";");
2198 }
2199
2200 void
2201 strdump(void) {
2202 int i;
2203 uint c;
2204
2205 printf("ESC%c", strescseq.type);
2206 for(i = 0; i < strescseq.len; i++) {
2207 c = strescseq.buf[i] & 0xff;
2208 if(c == '\0') {
2209 return;
2210 } else if(isprint(c)) {
2211 putchar(c);
2212 } else if(c == '\n') {
2213 printf("(\\n)");
2214 } else if(c == '\r') {
2215 printf("(\\r)");
2216 } else if(c == 0x1b) {
2217 printf("(\\e)");
2218 } else {
2219 printf("(%02x)", c);
2220 }
2221 }
2222 printf("ESC\\\n");
2223 }
2224
2225 void
2226 strreset(void) {
2227 memset(&strescseq, 0, sizeof(strescseq));
2228 }
2229
2230 void
2231 tprinter(char *s, size_t len) {
2232 if(iofd != -1 && xwrite(iofd, s, len) < 0) {
2233 fprintf(stderr, "Error writing in %s:%s\n",
2234 opt_io, strerror(errno));
2235 close(iofd);
2236 iofd = -1;
2237 }
2238 }
2239
2240 void
2241 toggleprinter(const Arg *arg) {
2242 term.mode ^= MODE_PRINT;
2243 }
2244
2245 void
2246 printscreen(const Arg *arg) {
2247 tdump();
2248 }
2249
2250 void
2251 printsel(const Arg *arg) {
2252 tdumpsel();
2253 }
2254
2255 void
2256 tdumpsel(void) {
2257 char *ptr;
2258
2259 if((ptr = getsel())) {
2260 tprinter(ptr, strlen(ptr));
2261 free(ptr);
2262 }
2263 }
2264
2265 void
2266 tdumpline(int n) {
2267 Glyph *bp, *end;
2268
2269 bp = &term.line[n][0];
2270 end = &bp[term.col-1];
2271 while(end > bp && !strcmp(" ", end->c))
2272 --end;
2273 if(bp != end || strcmp(bp->c, " ")) {
2274 for( ;bp <= end; ++bp)
2275 tprinter(bp->c, strlen(bp->c));
2276 }
2277 tprinter("\n", 1);
2278 }
2279
2280 void
2281 tdump(void) {
2282 int i;
2283
2284 for(i = 0; i < term.row; ++i)
2285 tdumpline(i);
2286 }
2287
2288 void
2289 tputtab(int n) {
2290 uint x = term.c.x;
2291
2292 if(n > 0) {
2293 while(x < term.col && n--)
2294 for(++x; x < term.col && !term.tabs[x]; ++x)
2295 /* nothing */ ;
2296 } else if(n < 0) {
2297 while(x > 0 && n++)
2298 for(--x; x > 0 && !term.tabs[x]; --x)
2299 /* nothing */ ;
2300 }
2301 tmoveto(x, term.c.y);
2302 }
2303
2304 void
2305 techo(char *buf, int len) {
2306 for(; len > 0; buf++, len--) {
2307 char c = *buf;
2308
2309 if(ISCONTROL(c)) { /* control code */
2310 if(c & 0x80) {
2311 c &= 0x7f;
2312 tputc("^", 1);
2313 tputc("[", 1);
2314 } else if(c != '\n' && c != '\r' && c != '\t') {
2315 c ^= '\x40';
2316 tputc("^", 1);
2317 }
2318 tputc(&c, 1);
2319 } else {
2320 break;
2321 }
2322 }
2323 if(len)
2324 tputc(buf, len);
2325 }
2326
2327 void
2328 tdeftran(char ascii) {
2329 char c, (*bp)[2];
2330 static char tbl[][2] = {
2331 {'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
2332 {'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
2333 {'5', CS_FIN}, {'C', CS_FIN},
2334 {0, 0}
2335 };
2336
2337 for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
2338 /* nothing */;
2339
2340 if (c == 0)
2341 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2342 else
2343 term.trantbl[term.icharset] = (*bp)[1];
2344 }
2345
2346 void
2347 tselcs(void) {
2348 MODBIT(term.c.attr.mode,
2349 term.trantbl[term.charset] == CS_GRAPHIC0,
2350 ATTR_GFX);
2351 }
2352
2353 bool
2354 tcontrolcode(uchar ascii) {
2355 static char question[UTF_SIZ] = "?";
2356
2357 switch(ascii) {
2358 case '\t': /* HT */
2359 tputtab(1);
2360 break;
2361 case '\b': /* BS */
2362 tmoveto(term.c.x-1, term.c.y);
2363 break;
2364 case '\r': /* CR */
2365 tmoveto(0, term.c.y);
2366 break;
2367 case '\f': /* LF */
2368 case '\v': /* VT */
2369 case '\n': /* LF */
2370 /* go to first col if the mode is set */
2371 tnewline(IS_SET(MODE_CRLF));
2372 break;
2373 case '\a': /* BEL */
2374 if(term.esc & ESC_STR_END) {
2375 /* backwards compatibility to xterm */
2376 strhandle();
2377 } else {
2378 if(!(xw.state & WIN_FOCUSED))
2379 xseturgency(1);
2380 if (bellvolume)
2381 XBell(xw.dpy, bellvolume);
2382 }
2383 break;
2384 case '\033': /* ESC */
2385 csireset();
2386 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2387 term.esc |= ESC_START;
2388 return 1;
2389 case '\016': /* SO */
2390 term.charset = 0;
2391 tselcs();
2392 break;
2393 case '\017': /* SI */
2394 term.charset = 1;
2395 tselcs();
2396 break;
2397 case '\032': /* SUB */
2398 tsetchar(question, &term.c.attr, term.c.x, term.c.y);
2399 case '\030': /* CAN */
2400 csireset();
2401 break;
2402 case '\005': /* ENQ (IGNORED) */
2403 case '\000': /* NUL (IGNORED) */
2404 case '\021': /* XON (IGNORED) */
2405 case '\023': /* XOFF (IGNORED) */
2406 case 0177: /* DEL (IGNORED) */
2407 case 0x84: /* TODO: IND */
2408 case 0x85: /* TODO: NEL */
2409 case 0x88: /* TODO: HTS */
2410 case 0x8d: /* TODO: RI */
2411 case 0x8e: /* TODO: SS2 */
2412 case 0x8f: /* TODO: SS3 */
2413 case 0x90: /* TODO: DCS */
2414 case 0x98: /* TODO: SOS */
2415 case 0x9a: /* TODO: DECID */
2416 case 0x9b: /* TODO: CSI */
2417 case 0x9c: /* TODO: ST */
2418 case 0x9d: /* TODO: OSC */
2419 case 0x9e: /* TODO: PM */
2420 case 0x9f: /* TODO: APC */
2421 break;
2422 default:
2423 return 0;
2424 }
2425 term.esc &= ~(ESC_STR_END|ESC_STR);
2426 return 1;
2427 }
2428
2429 void
2430 tdectest(char c) {
2431 static char E[UTF_SIZ] = "E";
2432 int x, y;
2433
2434 if(c == '8') { /* DEC screen alignment test. */
2435 for(x = 0; x < term.col; ++x) {
2436 for(y = 0; y < term.row; ++y)
2437 tsetchar(E, &term.c.attr, x, y);
2438 }
2439 }
2440 }
2441
2442 void
2443 tputc(char *c, int len) {
2444 uchar ascii;
2445 bool control;
2446 long unicodep;
2447 int width;
2448
2449 if(len == 1) {
2450 width = 1;
2451 unicodep = ascii = *c;
2452 } else {
2453 utf8decode(c, &unicodep, UTF_SIZ);
2454 width = wcwidth(unicodep);
2455 control = ISCONTROLC1(unicodep);
2456 ascii = unicodep;
2457 }
2458
2459 if(IS_SET(MODE_PRINT))
2460 tprinter(c, len);
2461 control = ISCONTROL(unicodep);
2462
2463 /*
2464 * STR sequence must be checked before anything else
2465 * because it uses all following characters until it
2466 * receives a ESC, a SUB, a ST or any other C1 control
2467 * character.
2468 */
2469 if(term.esc & ESC_STR) {
2470 if(width == 1 &&
2471 (ascii == '\a' || ascii == 030 ||
2472 ascii == 032 || ascii == 033 ||
2473 ISCONTROLC1(unicodep))) {
2474 term.esc &= ~ESC_STR;
2475 term.esc |= ESC_STR_END;
2476 } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
2477 memmove(&strescseq.buf[strescseq.len], c, len);
2478 strescseq.len += len;
2479 return;
2480 } else {
2481 /*
2482 * Here is a bug in terminals. If the user never sends
2483 * some code to stop the str or esc command, then st
2484 * will stop responding. But this is better than
2485 * silently failing with unknown characters. At least
2486 * then users will report back.
2487 *
2488 * In the case users ever get fixed, here is the code:
2489 */
2490 /*
2491 * term.esc = 0;
2492 * strhandle();
2493 */
2494 return;
2495 }
2496 }
2497
2498 /*
2499 * Actions of control codes must be performed as soon they arrive
2500 * because they can be embedded inside a control sequence, and
2501 * they must not cause conflicts with sequences.
2502 */
2503 if(control) {
2504 if (tcontrolcode(ascii))
2505 return;
2506 } else if(term.esc & ESC_START) {
2507 if(term.esc & ESC_CSI) {
2508 csiescseq.buf[csiescseq.len++] = ascii;
2509 if(BETWEEN(ascii, 0x40, 0x7E)
2510 || csiescseq.len >= \
2511 sizeof(csiescseq.buf)-1) {
2512 term.esc = 0;
2513 csiparse();
2514 csihandle();
2515 }
2516 return;
2517 } else if(term.esc & ESC_ALTCHARSET) {
2518 tdeftran(ascii);
2519 tselcs();
2520 } else if(term.esc & ESC_TEST) {
2521 tdectest(ascii);
2522 } else {
2523 switch(ascii) {
2524 case '[':
2525 term.esc |= ESC_CSI;
2526 return;
2527 case '#':
2528 term.esc |= ESC_TEST;
2529 return;
2530 case 'P': /* DCS -- Device Control String */
2531 case '_': /* APC -- Application Program Command */
2532 case '^': /* PM -- Privacy Message */
2533 case ']': /* OSC -- Operating System Command */
2534 case 'k': /* old title set compatibility */
2535 strreset();
2536 strescseq.type = ascii;
2537 term.esc |= ESC_STR;
2538 return;
2539 case '(': /* set primary charset G0 */
2540 case ')': /* set secondary charset G1 */
2541 case '*': /* set tertiary charset G2 */
2542 case '+': /* set quaternary charset G3 */
2543 term.icharset = ascii - '(';
2544 term.esc |= ESC_ALTCHARSET;
2545 return;
2546 case 'D': /* IND -- Linefeed */
2547 if(term.c.y == term.bot) {
2548 tscrollup(term.top, 1);
2549 } else {
2550 tmoveto(term.c.x, term.c.y+1);
2551 }
2552 break;
2553 case 'E': /* NEL -- Next line */
2554 tnewline(1); /* always go to first col */
2555 break;
2556 case 'H': /* HTS -- Horizontal tab stop */
2557 term.tabs[term.c.x] = 1;
2558 break;
2559 case 'M': /* RI -- Reverse index */
2560 if(term.c.y == term.top) {
2561 tscrolldown(term.top, 1);
2562 } else {
2563 tmoveto(term.c.x, term.c.y-1);
2564 }
2565 break;
2566 case 'Z': /* DECID -- Identify Terminal */
2567 ttywrite(VT102ID, sizeof(VT102ID) - 1);
2568 break;
2569 case 'c': /* RIS -- Reset to inital state */
2570 treset();
2571 xresettitle();
2572 xloadcols();
2573 break;
2574 case '=': /* DECPAM -- Application keypad */
2575 term.mode |= MODE_APPKEYPAD;
2576 break;
2577 case '>': /* DECPNM -- Normal keypad */
2578 term.mode &= ~MODE_APPKEYPAD;
2579 break;
2580 case '7': /* DECSC -- Save Cursor */
2581 tcursor(CURSOR_SAVE);
2582 break;
2583 case '8': /* DECRC -- Restore Cursor */
2584 tcursor(CURSOR_LOAD);
2585 break;
2586 case '\\': /* ST -- String Terminator */
2587 if(term.esc & ESC_STR_END)
2588 strhandle();
2589 break;
2590 default:
2591 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2592 (uchar) ascii, isprint(ascii)? ascii:'.');
2593 break;
2594 }
2595 }
2596 term.esc = 0;
2597 /*
2598 * All characters which form part of a sequence are not
2599 * printed
2600 */
2601 return;
2602 }
2603 /*
2604 * Display control codes only if we are in graphic mode
2605 */
2606 if(control && !(term.c.attr.mode & ATTR_GFX))
2607 return;
2608 if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2609 selclear(NULL);
2610 if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2611 term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
2612 tnewline(1);
2613 }
2614
2615 if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
2616 memmove(&term.line[term.c.y][term.c.x+1],
2617 &term.line[term.c.y][term.c.x],
2618 (term.col - term.c.x - 1) * sizeof(Glyph));
2619 }
2620
2621 if(term.c.x+width > term.col)
2622 tnewline(1);
2623
2624 tsetchar(c, &term.c.attr, term.c.x, term.c.y);
2625
2626 if(width == 2) {
2627 term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
2628 if(term.c.x+1 < term.col) {
2629 term.line[term.c.y][term.c.x+1].c[0] = '\0';
2630 term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
2631 }
2632 }
2633 if(term.c.x+width < term.col) {
2634 tmoveto(term.c.x+width, term.c.y);
2635 } else {
2636 term.c.state |= CURSOR_WRAPNEXT;
2637 }
2638 }
2639
2640 int
2641 tresize(int col, int row) {
2642 int i;
2643 int minrow = MIN(row, term.row);
2644 int mincol = MIN(col, term.col);
2645 int slide = term.c.y - row + 1;
2646 bool *bp;
2647 Line *orig;
2648
2649 if(col < 1 || row < 1)
2650 return 0;
2651
2652 /* free unneeded rows */
2653 i = 0;
2654 if(slide > 0) {
2655 /*
2656 * slide screen to keep cursor where we expect it -
2657 * tscrollup would work here, but we can optimize to
2658 * memmove because we're freeing the earlier lines
2659 */
2660 for(/* i = 0 */; i < slide; i++) {
2661 free(term.line[i]);
2662 free(term.alt[i]);
2663 }
2664 memmove(term.line, term.line + slide, row * sizeof(Line));
2665 memmove(term.alt, term.alt + slide, row * sizeof(Line));
2666 }
2667 for(i += row; i < term.row; i++) {
2668 free(term.line[i]);
2669 free(term.alt[i]);
2670 }
2671
2672 /* resize to new height */
2673 term.line = xrealloc(term.line, row * sizeof(Line));
2674 term.alt = xrealloc(term.alt, row * sizeof(Line));
2675 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2676 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2677
2678 /* resize each row to new width, zero-pad if needed */
2679 for(i = 0; i < minrow; i++) {
2680 term.dirty[i] = 1;
2681 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2682 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2683 }
2684
2685 /* allocate any new rows */
2686 for(/* i == minrow */; i < row; i++) {
2687 term.dirty[i] = 1;
2688 term.line[i] = xmalloc(col * sizeof(Glyph));
2689 term.alt[i] = xmalloc(col * sizeof(Glyph));
2690 }
2691 if(col > term.col) {
2692 bp = term.tabs + term.col;
2693
2694 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2695 while(--bp > term.tabs && !*bp)
2696 /* nothing */ ;
2697 for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2698 *bp = 1;
2699 }
2700 /* update terminal size */
2701 term.col = col;
2702 term.row = row;
2703 /* reset scrolling region */
2704 tsetscroll(0, row-1);
2705 /* make use of the LIMIT in tmoveto */
2706 tmoveto(term.c.x, term.c.y);
2707 /* Clearing both screens */
2708 orig = term.line;
2709 do {
2710 if(mincol < col && 0 < minrow) {
2711 tclearregion(mincol, 0, col - 1, minrow - 1);
2712 }
2713 if(0 < col && minrow < row) {
2714 tclearregion(0, minrow, col - 1, row - 1);
2715 }
2716 tcursor(CURSOR_SAVE);
2717 tswapscreen();
2718 tcursor(CURSOR_LOAD);
2719 } while(orig != term.line);
2720
2721 return (slide > 0);
2722 }
2723
2724 void
2725 xresize(int col, int row) {
2726 xw.tw = MAX(1, col * xw.cw);
2727 xw.th = MAX(1, row * xw.ch);
2728
2729 XFreePixmap(xw.dpy, xw.buf);
2730 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
2731 DefaultDepth(xw.dpy, xw.scr));
2732 XftDrawChange(xw.draw, xw.buf);
2733 xclear(0, 0, xw.w, xw.h);
2734 }
2735
2736 static inline ushort
2737 sixd_to_16bit(int x) {
2738 return x == 0 ? 0 : 0x3737 + 0x2828 * x;
2739 }
2740
2741 void
2742 xloadcols(void) {
2743 int i, r, g, b;
2744 XRenderColor color = { .alpha = 0xffff };
2745 static bool loaded;
2746 Colour *cp;
2747
2748 if(loaded) {
2749 for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
2750 XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
2751 }
2752
2753 /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
2754 for(i = 0; i < LEN(colorname); i++) {
2755 if(!colorname[i])
2756 continue;
2757 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
2758 die("Could not allocate color '%s'\n", colorname[i]);
2759 }
2760 }
2761
2762 /* load colors [16-255] ; same colors as xterm */
2763 for(i = 16, r = 0; r < 6; r++) {
2764 for(g = 0; g < 6; g++) {
2765 for(b = 0; b < 6; b++) {
2766 color.red = sixd_to_16bit(r);
2767 color.green = sixd_to_16bit(g);
2768 color.blue = sixd_to_16bit(b);
2769 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
2770 die("Could not allocate color %d\n", i);
2771 }
2772 i++;
2773 }
2774 }
2775 }
2776
2777 for(r = 0; r < 24; r++, i++) {
2778 color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
2779 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
2780 &dc.col[i])) {
2781 die("Could not allocate color %d\n", i);
2782 }
2783 }
2784 loaded = true;
2785 }
2786
2787 int
2788 xsetcolorname(int x, const char *name) {
2789 XRenderColor color = { .alpha = 0xffff };
2790 Colour colour;
2791 if(!BETWEEN(x, 0, LEN(colorname)))
2792 return -1;
2793 if(!name) {
2794 if(BETWEEN(x, 16, 16 + 215)) {
2795 int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
2796 color.red = sixd_to_16bit(r);
2797 color.green = sixd_to_16bit(g);
2798 color.blue = sixd_to_16bit(b);
2799 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2800 return 0; /* something went wrong */
2801 dc.col[x] = colour;
2802 return 1;
2803 } else if(BETWEEN(x, 16 + 216, 255)) {
2804 color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
2805 if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
2806 return 0; /* something went wrong */
2807 dc.col[x] = colour;
2808 return 1;
2809 } else {
2810 name = colorname[x];
2811 }
2812 }
2813 if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
2814 return 0;
2815 dc.col[x] = colour;
2816 return 1;
2817 }
2818
2819 void
2820 xtermclear(int col1, int row1, int col2, int row2) {
2821 XftDrawRect(xw.draw,
2822 &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
2823 borderpx + col1 * xw.cw,
2824 borderpx + row1 * xw.ch,
2825 (col2-col1+1) * xw.cw,
2826 (row2-row1+1) * xw.ch);
2827 }
2828
2829 /*
2830 * Absolute coordinates.
2831 */
2832 void
2833 xclear(int x1, int y1, int x2, int y2) {
2834 XftDrawRect(xw.draw,
2835 &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
2836 x1, y1, x2-x1, y2-y1);
2837 }
2838
2839 void
2840 xhints(void) {
2841 XClassHint class = {opt_class ? opt_class : termname, termname};
2842 XWMHints wm = {.flags = InputHint, .input = 1};
2843 XSizeHints *sizeh = NULL;
2844
2845 sizeh = XAllocSizeHints();
2846
2847 sizeh->flags = PSize | PResizeInc | PBaseSize;
2848 sizeh->height = xw.h;
2849 sizeh->width = xw.w;
2850 sizeh->height_inc = xw.ch;
2851 sizeh->width_inc = xw.cw;
2852 sizeh->base_height = 2 * borderpx;
2853 sizeh->base_width = 2 * borderpx;
2854 if(xw.isfixed == True) {
2855 sizeh->flags |= PMaxSize | PMinSize;
2856 sizeh->min_width = sizeh->max_width = xw.w;
2857 sizeh->min_height = sizeh->max_height = xw.h;
2858 }
2859 if(xw.gm & (XValue|YValue)) {
2860 sizeh->flags |= USPosition | PWinGravity;
2861 sizeh->x = xw.l;
2862 sizeh->y = xw.t;
2863 sizeh->win_gravity = xgeommasktogravity(xw.gm);
2864 }
2865
2866 XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
2867 &class);
2868 XFree(sizeh);
2869 }
2870
2871 int
2872 xgeommasktogravity(int mask) {
2873 switch(mask & (XNegative|YNegative)) {
2874 case 0:
2875 return NorthWestGravity;
2876 case XNegative:
2877 return NorthEastGravity;
2878 case YNegative:
2879 return SouthWestGravity;
2880 }
2881 return SouthEastGravity;
2882 }
2883
2884 int
2885 xloadfont(Font *f, FcPattern *pattern) {
2886 FcPattern *match;
2887 FcResult result;
2888
2889 match = FcFontMatch(NULL, pattern, &result);
2890 if(!match)
2891 return 1;
2892
2893 if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
2894 FcPatternDestroy(match);
2895 return 1;
2896 }
2897
2898 f->set = NULL;
2899 f->pattern = FcPatternDuplicate(pattern);
2900
2901 f->ascent = f->match->ascent;
2902 f->descent = f->match->descent;
2903 f->lbearing = 0;
2904 f->rbearing = f->match->max_advance_width;
2905
2906 f->height = f->ascent + f->descent;
2907 f->width = f->lbearing + f->rbearing;
2908
2909 return 0;
2910 }
2911
2912 void
2913 xloadfonts(char *fontstr, double fontsize) {
2914 FcPattern *pattern;
2915 FcResult r_sz, r_psz;
2916 double fontval;
2917
2918 if(fontstr[0] == '-') {
2919 pattern = XftXlfdParse(fontstr, False, False);
2920 } else {
2921 pattern = FcNameParse((FcChar8 *)fontstr);
2922 }
2923
2924 if(!pattern)
2925 die("st: can't open font %s\n", fontstr);
2926
2927 if(fontsize > 0) {
2928 FcPatternDel(pattern, FC_PIXEL_SIZE);
2929 FcPatternDel(pattern, FC_SIZE);
2930 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
2931 usedfontsize = fontsize;
2932 } else {
2933 r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
2934 r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
2935 if(r_psz == FcResultMatch) {
2936 usedfontsize = fontval;
2937 } else if(r_sz == FcResultMatch) {
2938 usedfontsize = -1;
2939 } else {
2940 /*
2941 * Default font size is 12, if none given. This is to
2942 * have a known usedfontsize value.
2943 */
2944 FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
2945 usedfontsize = 12;
2946 }
2947 }
2948
2949 FcConfigSubstitute(0, pattern, FcMatchPattern);
2950 FcDefaultSubstitute(pattern);
2951
2952 if(xloadfont(&dc.font, pattern))
2953 die("st: can't open font %s\n", fontstr);
2954
2955 if(usedfontsize < 0) {
2956 FcPatternGetDouble(dc.font.match->pattern,
2957 FC_PIXEL_SIZE, 0, &fontval);
2958 usedfontsize = fontval;
2959 }
2960
2961 /* Setting character width and height. */
2962 xw.cw = CEIL(dc.font.width * cwscale);
2963 xw.ch = CEIL(dc.font.height * chscale);
2964
2965 FcPatternDel(pattern, FC_SLANT);
2966 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
2967 if(xloadfont(&dc.ifont, pattern))
2968 die("st: can't open font %s\n", fontstr);
2969
2970 FcPatternDel(pattern, FC_WEIGHT);
2971 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
2972 if(xloadfont(&dc.ibfont, pattern))
2973 die("st: can't open font %s\n", fontstr);
2974
2975 FcPatternDel(pattern, FC_SLANT);
2976 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
2977 if(xloadfont(&dc.bfont, pattern))
2978 die("st: can't open font %s\n", fontstr);
2979
2980 FcPatternDestroy(pattern);
2981 }
2982
2983 int
2984 xloadfontset(Font *f) {
2985 FcResult result;
2986
2987 if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
2988 return 1;
2989 return 0;
2990 }
2991
2992 void
2993 xunloadfont(Font *f) {
2994 XftFontClose(xw.dpy, f->match);
2995 FcPatternDestroy(f->pattern);
2996 if(f->set)
2997 FcFontSetDestroy(f->set);
2998 }
2999
3000 void
3001 xunloadfonts(void) {
3002 int i;
3003
3004 /* Free the loaded fonts in the font cache. */
3005 for(i = 0; i < frclen; i++) {
3006 XftFontClose(xw.dpy, frc[i].font);
3007 }
3008 frclen = 0;
3009
3010 xunloadfont(&dc.font);
3011 xunloadfont(&dc.bfont);
3012 xunloadfont(&dc.ifont);
3013 xunloadfont(&dc.ibfont);
3014 }
3015
3016 void
3017 xzoom(const Arg *arg) {
3018 xunloadfonts();
3019 xloadfonts(usedfont, usedfontsize + arg->i);
3020 cresize(0, 0);
3021 redraw(0);
3022 }
3023
3024 void
3025 xinit(void) {
3026 XGCValues gcvalues;
3027 Cursor cursor;
3028 Window parent;
3029 pid_t thispid = getpid();
3030
3031 if(!(xw.dpy = XOpenDisplay(NULL)))
3032 die("Can't open display\n");
3033 xw.scr = XDefaultScreen(xw.dpy);
3034 xw.vis = XDefaultVisual(xw.dpy, xw.scr);
3035
3036 /* font */
3037 if(!FcInit())
3038 die("Could not init fontconfig.\n");
3039
3040 usedfont = (opt_font == NULL)? font : opt_font;
3041 xloadfonts(usedfont, 0);
3042
3043 /* colors */
3044 xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
3045 xloadcols();
3046
3047 /* adjust fixed window geometry */
3048 xw.w = 2 * borderpx + term.col * xw.cw;
3049 xw.h = 2 * borderpx + term.row * xw.ch;
3050 if(xw.gm & XNegative)
3051 xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
3052 if(xw.gm & YNegative)
3053 xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
3054
3055 /* Events */
3056 xw.attrs.background_pixel = dc.col[defaultbg].pixel;
3057 xw.attrs.border_pixel = dc.col[defaultbg].pixel;
3058 xw.attrs.bit_gravity = NorthWestGravity;
3059 xw.attrs.event_mask = FocusChangeMask | KeyPressMask
3060 | ExposureMask | VisibilityChangeMask | StructureNotifyMask
3061 | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
3062 xw.attrs.colormap = xw.cmap;
3063
3064 parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
3065 XRootWindow(xw.dpy, xw.scr);
3066 xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
3067 xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
3068 xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
3069 | CWEventMask | CWColormap, &xw.attrs);
3070
3071 memset(&gcvalues, 0, sizeof(gcvalues));
3072 gcvalues.graphics_exposures = False;
3073 dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
3074 &gcvalues);
3075 xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
3076 DefaultDepth(xw.dpy, xw.scr));
3077 XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
3078 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
3079
3080 /* Xft rendering context */
3081 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
3082
3083 /* input methods */
3084 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3085 XSetLocaleModifiers("@im=local");
3086 if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
3087 XSetLocaleModifiers("@im=");
3088 if((xw.xim = XOpenIM(xw.dpy,
3089 NULL, NULL, NULL)) == NULL) {
3090 die("XOpenIM failed. Could not open input"
3091 " device.\n");
3092 }
3093 }
3094 }
3095 xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
3096 | XIMStatusNothing, XNClientWindow, xw.win,
3097 XNFocusWindow, xw.win, NULL);
3098 if(xw.xic == NULL)
3099 die("XCreateIC failed. Could not obtain input method.\n");
3100
3101 /* white cursor, black outline */
3102 cursor = XCreateFontCursor(xw.dpy, XC_xterm);
3103 XDefineCursor(xw.dpy, xw.win, cursor);
3104 XRecolorCursor(xw.dpy, cursor,
3105 &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
3106 &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
3107
3108 xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
3109 xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
3110 xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
3111 XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
3112
3113 xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
3114 XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
3115 PropModeReplace, (uchar *)&thispid, 1);
3116
3117 xresettitle();
3118 XMapWindow(xw.dpy, xw.win);
3119 xhints();
3120 XSync(xw.dpy, False);
3121 }
3122
3123 void
3124 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
3125 int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
3126 width = charlen * xw.cw, xp, i;
3127 int frcflags;
3128 int u8fl, u8fblen, u8cblen, doesexist;
3129 char *u8c, *u8fs;
3130 long unicodep;
3131 Font *font = &dc.font;
3132 FcResult fcres;
3133 FcPattern *fcpattern, *fontpattern;
3134 FcFontSet *fcsets[] = { NULL };
3135 FcCharSet *fccharset;
3136 Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
3137 XRenderColor colfg, colbg;
3138 XRectangle r;
3139 int oneatatime;
3140
3141 frcflags = FRC_NORMAL;
3142
3143 if(base.mode & ATTR_ITALIC) {
3144 if(base.fg == defaultfg)
3145 base.fg = defaultitalic;
3146 font = &dc.ifont;
3147 frcflags = FRC_ITALIC;
3148 } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
3149 if(base.fg == defaultfg)
3150 base.fg = defaultitalic;
3151 font = &dc.ibfont;
3152 frcflags = FRC_ITALICBOLD;
3153 } else if(base.mode & ATTR_UNDERLINE) {
3154 if(base.fg == defaultfg)
3155 base.fg = defaultunderline;
3156 }
3157
3158 if(IS_TRUECOL(base.fg)) {
3159 colfg.alpha = 0xffff;
3160 colfg.red = TRUERED(base.fg);
3161 colfg.green = TRUEGREEN(base.fg);
3162 colfg.blue = TRUEBLUE(base.fg);
3163 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
3164 fg = &truefg;
3165 } else {
3166 fg = &dc.col[base.fg];
3167 }
3168
3169 if(IS_TRUECOL(base.bg)) {
3170 colbg.alpha = 0xffff;
3171 colbg.green = TRUEGREEN(base.bg);
3172 colbg.red = TRUERED(base.bg);
3173 colbg.blue = TRUEBLUE(base.bg);
3174 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
3175 bg = &truebg;
3176 } else {
3177 bg = &dc.col[base.bg];
3178 }
3179
3180 if(base.mode & ATTR_BOLD) {
3181 if(BETWEEN(base.fg, 0, 7)) {
3182 /* basic system colors */
3183 fg = &dc.col[base.fg + 8];
3184 } else if(BETWEEN(base.fg, 16, 195)) {
3185 /* 256 colors */
3186 fg = &dc.col[base.fg + 36];
3187 } else if(BETWEEN(base.fg, 232, 251)) {
3188 /* greyscale */
3189 fg = &dc.col[base.fg + 4];
3190 }
3191 /*
3192 * Those ranges will not be brightened:
3193 * 8 - 15 – bright system colors
3194 * 196 - 231 – highest 256 color cube
3195 * 252 - 255 – brightest colors in greyscale
3196 */
3197 font = &dc.bfont;
3198 frcflags = FRC_BOLD;
3199 }
3200
3201 if(IS_SET(MODE_REVERSE)) {
3202 if(fg == &dc.col[defaultfg]) {
3203 fg = &dc.col[defaultbg];
3204 } else {
3205 colfg.red = ~fg->color.red;
3206 colfg.green = ~fg->color.green;
3207 colfg.blue = ~fg->color.blue;
3208 colfg.alpha = fg->color.alpha;
3209 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
3210 &revfg);
3211 fg = &revfg;
3212 }
3213
3214 if(bg == &dc.col[defaultbg]) {
3215 bg = &dc.col[defaultfg];
3216 } else {
3217 colbg.red = ~bg->color.red;
3218 colbg.green = ~bg->color.green;
3219 colbg.blue = ~bg->color.blue;
3220 colbg.alpha = bg->color.alpha;
3221 XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
3222 &revbg);
3223 bg = &revbg;
3224 }
3225 }
3226
3227 if(base.mode & ATTR_REVERSE) {
3228 temp = fg;
3229 fg = bg;
3230 bg = temp;
3231 }
3232
3233 if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
3234 fg = bg;
3235
3236 /* Intelligent cleaning up of the borders. */
3237 if(x == 0) {
3238 xclear(0, (y == 0)? 0 : winy, borderpx,
3239 winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
3240 }
3241 if(x + charlen >= term.col) {
3242 xclear(winx + width, (y == 0)? 0 : winy, xw.w,
3243 ((y >= term.row-1)? xw.h : (winy + xw.ch)));
3244 }
3245 if(y == 0)
3246 xclear(winx, 0, winx + width, borderpx);
3247 if(y == term.row-1)
3248 xclear(winx, winy + xw.ch, winx + width, xw.h);
3249
3250 /* Clean up the region we want to draw to. */
3251 XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
3252
3253 /* Set the clip region because Xft is sometimes dirty. */
3254 r.x = 0;
3255 r.y = 0;
3256 r.height = xw.ch;
3257 r.width = width;
3258 XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
3259
3260 for(xp = winx; bytelen > 0;) {
3261 /*
3262 * Search for the range in the to be printed string of glyphs
3263 * that are in the main font. Then print that range. If
3264 * some glyph is found that is not in the font, do the
3265 * fallback dance.
3266 */
3267 u8fs = s;
3268 u8fblen = 0;
3269 u8fl = 0;
3270 oneatatime = font->width != xw.cw;
3271 for(;;) {
3272 u8c = s;
3273 u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
3274 s += u8cblen;
3275 bytelen -= u8cblen;
3276
3277 doesexist = XftCharExists(xw.dpy, font->match, unicodep);
3278 if(oneatatime || !doesexist || bytelen <= 0) {
3279 if(oneatatime || bytelen <= 0) {
3280 if(doesexist) {
3281 u8fl++;
3282 u8fblen += u8cblen;
3283 }
3284 }
3285
3286 if(u8fl > 0) {
3287 XftDrawStringUtf8(xw.draw, fg,
3288 font->match, xp,
3289 winy + font->ascent,
3290 (FcChar8 *)u8fs,
3291 u8fblen);
3292 xp += xw.cw * u8fl;
3293
3294 }
3295 break;
3296 }
3297
3298 u8fl++;
3299 u8fblen += u8cblen;
3300 }
3301 if(doesexist) {
3302 if(oneatatime)
3303 continue;
3304 break;
3305 }
3306
3307 /* Search the font cache. */
3308 for(i = 0; i < frclen; i++) {
3309 if(XftCharExists(xw.dpy, frc[i].font, unicodep)
3310 && frc[i].flags == frcflags) {
3311 break;
3312 }
3313 }
3314
3315 /* Nothing was found. */
3316 if(i >= frclen) {
3317 if(!font->set)
3318 xloadfontset(font);
3319 fcsets[0] = font->set;
3320
3321 /*
3322 * Nothing was found in the cache. Now use
3323 * some dozen of Fontconfig calls to get the
3324 * font for one single character.
3325 *
3326 * Xft and fontconfig are design failures.
3327 */
3328 fcpattern = FcPatternDuplicate(font->pattern);
3329 fccharset = FcCharSetCreate();
3330
3331 FcCharSetAddChar(fccharset, unicodep);
3332 FcPatternAddCharSet(fcpattern, FC_CHARSET,
3333 fccharset);
3334 FcPatternAddBool(fcpattern, FC_SCALABLE,
3335 FcTrue);
3336
3337 FcConfigSubstitute(0, fcpattern,
3338 FcMatchPattern);
3339 FcDefaultSubstitute(fcpattern);
3340
3341 fontpattern = FcFontSetMatch(0, fcsets,
3342 FcTrue, fcpattern, &fcres);
3343
3344 /*
3345 * Overwrite or create the new cache entry.
3346 */
3347 if(frclen >= LEN(frc)) {
3348 frclen = LEN(frc) - 1;
3349 XftFontClose(xw.dpy, frc[frclen].font);
3350 }
3351
3352 frc[frclen].font = XftFontOpenPattern(xw.dpy,
3353 fontpattern);
3354 frc[frclen].flags = frcflags;
3355
3356 i = frclen;
3357 frclen++;
3358
3359 FcPatternDestroy(fcpattern);
3360 FcCharSetDestroy(fccharset);
3361 }
3362
3363 XftDrawStringUtf8(xw.draw, fg, frc[i].font,
3364 xp, winy + frc[i].font->ascent,
3365 (FcChar8 *)u8c, u8cblen);
3366
3367 xp += xw.cw * wcwidth(unicodep);
3368 }
3369
3370 /*
3371 * This is how the loop above actually should be. Why does the
3372 * application have to care about font details?
3373 *
3374 * I have to repeat: Xft and Fontconfig are design failures.
3375 */
3376 /*
3377 XftDrawStringUtf8(xw.draw, fg, font->set, winx,
3378 winy + font->ascent, (FcChar8 *)s, bytelen);
3379 */
3380
3381 if(base.mode & ATTR_UNDERLINE) {
3382 XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
3383 width, 1);
3384 }
3385
3386 /* Reset clip to none. */
3387 XftDrawSetClip(xw.draw, 0);
3388 }
3389
3390 void
3391 xdrawcursor(void) {
3392 static int oldx = 0, oldy = 0;
3393 int sl, width, curx;
3394 Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
3395
3396 LIMIT(oldx, 0, term.col-1);
3397 LIMIT(oldy, 0, term.row-1);
3398
3399 curx = term.c.x;
3400
3401 /* adjust position if in dummy */
3402 if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
3403 oldx--;
3404 if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
3405 curx--;
3406
3407 memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
3408
3409 /* remove the old cursor */
3410 sl = utf8len(term.line[oldy][oldx].c);
3411 width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
3412 xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
3413 oldy, width, sl);
3414
3415 /* draw the new one */
3416 if(!(IS_SET(MODE_HIDE))) {
3417 if(xw.state & WIN_FOCUSED) {
3418 if(IS_SET(MODE_REVERSE)) {
3419 g.mode |= ATTR_REVERSE;
3420 g.fg = defaultcs;
3421 g.bg = defaultfg;
3422 }
3423
3424 sl = utf8len(g.c);
3425 width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
3426 ? 2 : 1;
3427 xdraws(g.c, g, term.c.x, term.c.y, width, sl);
3428 } else {
3429 XftDrawRect(xw.draw, &dc.col[defaultcs],
3430 borderpx + curx * xw.cw,
3431 borderpx + term.c.y * xw.ch,
3432 xw.cw - 1, 1);
3433 XftDrawRect(xw.draw, &dc.col[defaultcs],
3434 borderpx + curx * xw.cw,
3435 borderpx + term.c.y * xw.ch,
3436 1, xw.ch - 1);
3437 XftDrawRect(xw.draw, &dc.col[defaultcs],
3438 borderpx + (curx + 1) * xw.cw - 1,
3439 borderpx + term.c.y * xw.ch,
3440 1, xw.ch - 1);
3441 XftDrawRect(xw.draw, &dc.col[defaultcs],
3442 borderpx + curx * xw.cw,
3443 borderpx + (term.c.y + 1) * xw.ch - 1,
3444 xw.cw, 1);
3445 }
3446 oldx = curx, oldy = term.c.y;
3447 }
3448 }
3449
3450
3451 void
3452 xsettitle(char *p) {
3453 XTextProperty prop;
3454
3455 Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
3456 &prop);
3457 XSetWMName(xw.dpy, xw.win, &prop);
3458 XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
3459 XFree(prop.value);
3460 }
3461
3462 void
3463 xresettitle(void) {
3464 xsettitle(opt_title ? opt_title : "st");
3465 }
3466
3467 void
3468 redraw(int timeout) {
3469 struct timespec tv = {0, timeout * 1000};
3470
3471 draw();
3472
3473 if(timeout > 0) {
3474 nanosleep(&tv, NULL);
3475 XSync(xw.dpy, False); /* necessary for a good tput flash */
3476 }
3477 }
3478
3479 void
3480 draw(void) {
3481 drawregion(0, 0, term.col, term.row);
3482 XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
3483 xw.h, 0, 0);
3484 XSetForeground(xw.dpy, dc.gc,
3485 dc.col[IS_SET(MODE_REVERSE)?
3486 defaultfg : defaultbg].pixel);
3487 }
3488
3489 void
3490 drawregion(int x1, int y1, int x2, int y2) {
3491 int ic, ib, x, y, ox, sl;
3492 Glyph base, new;
3493 char buf[DRAW_BUF_SIZ];
3494 bool ena_sel = sel.ob.x != -1;
3495 long unicodep;
3496
3497 if(sel.alt != IS_SET(MODE_ALTSCREEN))
3498 ena_sel = 0;
3499
3500 if(!(xw.state & WIN_VISIBLE))
3501 return;
3502
3503 for(y = y1; y < y2; y++) {
3504 if(!term.dirty[y])
3505 continue;
3506
3507 xtermclear(0, y, term.col, y);
3508 term.dirty[y] = 0;
3509 base = term.line[y][0];
3510 ic = ib = ox = 0;
3511 for(x = x1; x < x2; x++) {
3512 new = term.line[y][x];
3513 if(new.mode == ATTR_WDUMMY)
3514 continue;
3515 if(ena_sel && selected(x, y))
3516 new.mode ^= ATTR_REVERSE;
3517 if(ib > 0 && (ATTRCMP(base, new)
3518 || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
3519 xdraws(buf, base, ox, y, ic, ib);
3520 ic = ib = 0;
3521 }
3522 if(ib == 0) {
3523 ox = x;
3524 base = new;
3525 }
3526
3527 sl = utf8decode(new.c, &unicodep, UTF_SIZ);
3528 memcpy(buf+ib, new.c, sl);
3529 ib += sl;
3530 ic += (new.mode & ATTR_WIDE)? 2 : 1;
3531 }
3532 if(ib > 0)
3533 xdraws(buf, base, ox, y, ic, ib);
3534 }
3535 xdrawcursor();
3536 }
3537
3538 void
3539 expose(XEvent *ev) {
3540 XExposeEvent *e = &ev->xexpose;
3541
3542 if(xw.state & WIN_REDRAW) {
3543 if(!e->count)
3544 xw.state &= ~WIN_REDRAW;
3545 }
3546 redraw(0);
3547 }
3548
3549 void
3550 visibility(XEvent *ev) {
3551 XVisibilityEvent *e = &ev->xvisibility;
3552
3553 if(e->state == VisibilityFullyObscured) {
3554 xw.state &= ~WIN_VISIBLE;
3555 } else if(!(xw.state & WIN_VISIBLE)) {
3556 /* need a full redraw for next Expose, not just a buf copy */
3557 xw.state |= WIN_VISIBLE | WIN_REDRAW;
3558 }
3559 }
3560
3561 void
3562 unmap(XEvent *ev) {
3563 xw.state &= ~WIN_VISIBLE;
3564 }
3565
3566 void
3567 xsetpointermotion(int set) {
3568 MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
3569 XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
3570 }
3571
3572 void
3573 xseturgency(int add) {
3574 XWMHints *h = XGetWMHints(xw.dpy, xw.win);
3575
3576 h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
3577 XSetWMHints(xw.dpy, xw.win, h);
3578 XFree(h);
3579 }
3580
3581 void
3582 focus(XEvent *ev) {
3583 XFocusChangeEvent *e = &ev->xfocus;
3584
3585 if(e->mode == NotifyGrab)
3586 return;
3587
3588 if(ev->type == FocusIn) {
3589 XSetICFocus(xw.xic);
3590 xw.state |= WIN_FOCUSED;
3591 xseturgency(0);
3592 if(IS_SET(MODE_FOCUS))
3593 ttywrite("\033[I", 3);
3594 } else {
3595 XUnsetICFocus(xw.xic);
3596 xw.state &= ~WIN_FOCUSED;
3597 if(IS_SET(MODE_FOCUS))
3598 ttywrite("\033[O", 3);
3599 }
3600 }
3601
3602 static inline bool
3603 match(uint mask, uint state) {
3604 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
3605 }
3606
3607 void
3608 numlock(const Arg *dummy) {
3609 term.numlock ^= 1;
3610 }
3611
3612 char*
3613 kmap(KeySym k, uint state) {
3614 Key *kp;
3615 int i;
3616
3617 /* Check for mapped keys out of X11 function keys. */
3618 for(i = 0; i < LEN(mappedkeys); i++) {
3619 if(mappedkeys[i] == k)
3620 break;
3621 }
3622 if(i == LEN(mappedkeys)) {
3623 if((k & 0xFFFF) < 0xFD00)
3624 return NULL;
3625 }
3626
3627 for(kp = key; kp < key + LEN(key); kp++) {
3628 if(kp->k != k)
3629 continue;
3630
3631 if(!match(kp->mask, state))
3632 continue;
3633
3634 if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
3635 continue;
3636 if(term.numlock && kp->appkey == 2)
3637 continue;
3638
3639 if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
3640 continue;
3641
3642 if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
3643 continue;
3644
3645 return kp->s;
3646 }
3647
3648 return NULL;
3649 }
3650
3651 void
3652 kpress(XEvent *ev) {
3653 XKeyEvent *e = &ev->xkey;
3654 KeySym ksym;
3655 char buf[32], *customkey;
3656 int len;
3657 long c;
3658 Status status;
3659 Shortcut *bp;
3660
3661 if(IS_SET(MODE_KBDLOCK))
3662 return;
3663
3664 len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
3665 /* 1. shortcuts */
3666 for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
3667 if(ksym == bp->keysym && match(bp->mod, e->state)) {
3668 bp->func(&(bp->arg));
3669 return;
3670 }
3671 }
3672
3673 /* 2. custom keys from config.h */
3674 if((customkey = kmap(ksym, e->state))) {
3675 ttysend(customkey, strlen(customkey));
3676 return;
3677 }
3678
3679 /* 3. composed string from input method */
3680 if(len == 0)
3681 return;
3682 if(len == 1 && e->state & Mod1Mask) {
3683 if(IS_SET(MODE_8BIT)) {
3684 if(*buf < 0177) {
3685 c = *buf | 0x80;
3686 len = utf8encode(c, buf, UTF_SIZ);
3687 }
3688 } else {
3689 buf[1] = buf[0];
3690 buf[0] = '\033';
3691 len = 2;
3692 }
3693 }
3694 ttysend(buf, len);
3695 }
3696
3697
3698 void
3699 cmessage(XEvent *e) {
3700 /*
3701 * See xembed specs
3702 * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
3703 */
3704 if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
3705 if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
3706 xw.state |= WIN_FOCUSED;
3707 xseturgency(0);
3708 } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
3709 xw.state &= ~WIN_FOCUSED;
3710 }
3711 } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
3712 /* Send SIGHUP to shell */
3713 kill(pid, SIGHUP);
3714 exit(EXIT_SUCCESS);
3715 }
3716 }
3717
3718 void
3719 cresize(int width, int height) {
3720 int col, row;
3721
3722 if(width != 0)
3723 xw.w = width;
3724 if(height != 0)
3725 xw.h = height;
3726
3727 col = (xw.w - 2 * borderpx) / xw.cw;
3728 row = (xw.h - 2 * borderpx) / xw.ch;
3729
3730 tresize(col, row);
3731 xresize(col, row);
3732 ttyresize();
3733 }
3734
3735 void
3736 resize(XEvent *e) {
3737 if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
3738 return;
3739
3740 cresize(e->xconfigure.width, e->xconfigure.height);
3741 }
3742
3743 void
3744 run(void) {
3745 XEvent ev;
3746 int w = xw.w, h = xw.h;
3747 fd_set rfd;
3748 int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
3749 struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
3750
3751 /* Waiting for window mapping */
3752 while(1) {
3753 XNextEvent(xw.dpy, &ev);
3754 if(ev.type == ConfigureNotify) {
3755 w = ev.xconfigure.width;
3756 h = ev.xconfigure.height;
3757 } else if(ev.type == MapNotify) {
3758 break;
3759 }
3760 }
3761
3762 ttynew();
3763 cresize(w, h);
3764
3765 gettimeofday(&last, NULL);
3766 lastblink = last;
3767
3768 for(xev = actionfps;;) {
3769 long deltatime;
3770
3771 FD_ZERO(&rfd);
3772 FD_SET(cmdfd, &rfd);
3773 FD_SET(xfd, &rfd);
3774
3775 if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
3776 if(errno == EINTR)
3777 continue;
3778 die("select failed: %s\n", strerror(errno));
3779 }
3780 if(FD_ISSET(cmdfd, &rfd)) {
3781 ttyread();
3782 if(blinktimeout) {
3783 blinkset = tattrset(ATTR_BLINK);
3784 if(!blinkset)
3785 MODBIT(term.mode, 0, MODE_BLINK);
3786 }
3787 }
3788
3789 if(FD_ISSET(xfd, &rfd))
3790 xev = actionfps;
3791
3792 gettimeofday(&now, NULL);
3793 drawtimeout.tv_sec = 0;
3794 drawtimeout.tv_usec = (1000/xfps) * 1000;
3795 tv = &drawtimeout;
3796
3797 dodraw = 0;
3798 if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
3799 tsetdirtattr(ATTR_BLINK);
3800 term.mode ^= MODE_BLINK;
3801 lastblink = now;
3802 dodraw = 1;
3803 }
3804 deltatime = TIMEDIFF(now, last);
3805 if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
3806 || deltatime < 0) {
3807 dodraw = 1;
3808 last = now;
3809 }
3810
3811 if(dodraw) {
3812 while(XPending(xw.dpy)) {
3813 XNextEvent(xw.dpy, &ev);
3814 if(XFilterEvent(&ev, None))
3815 continue;
3816 if(handler[ev.type])
3817 (handler[ev.type])(&ev);
3818 }
3819
3820 draw();
3821 XFlush(xw.dpy);
3822
3823 if(xev && !FD_ISSET(xfd, &rfd))
3824 xev--;
3825 if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
3826 if(blinkset) {
3827 if(TIMEDIFF(now, lastblink) \
3828 > blinktimeout) {
3829 drawtimeout.tv_usec = 1;
3830 } else {
3831 drawtimeout.tv_usec = (1000 * \
3832 (blinktimeout - \
3833 TIMEDIFF(now,
3834 lastblink)));
3835 }
3836 } else {
3837 tv = NULL;
3838 }
3839 }
3840 }
3841 }
3842 }
3843
3844 void
3845 usage(void) {
3846 die("%s " VERSION " (c) 2010-2014 st engineers\n" \
3847 "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
3848 " [-t title] [-w windowid] [-e command ...]\n", argv0);
3849 }
3850
3851 int
3852 main(int argc, char *argv[]) {
3853 char *titles;
3854 uint cols = 80, rows = 24;
3855
3856 xw.l = xw.t = 0;
3857 xw.isfixed = False;
3858
3859 ARGBEGIN {
3860 case 'a':
3861 allowaltscreen = false;
3862 break;
3863 case 'c':
3864 opt_class = EARGF(usage());
3865 break;
3866 case 'e':
3867 /* eat all remaining arguments */
3868 if(argc > 1) {
3869 opt_cmd = &argv[1];
3870 if(argv[1] != NULL && opt_title == NULL) {
3871 titles = xstrdup(argv[1]);
3872 opt_title = basename(titles);
3873 }
3874 }
3875 goto run;
3876 case 'f':
3877 opt_font = EARGF(usage());
3878 break;
3879 case 'g':
3880 xw.gm = XParseGeometry(EARGF(usage()),
3881 &xw.l, &xw.t, &cols, &rows);
3882 break;
3883 case 'i':
3884 xw.isfixed = True;
3885 break;
3886 case 'o':
3887 opt_io = EARGF(usage());
3888 break;
3889 case 't':
3890 opt_title = EARGF(usage());
3891 break;
3892 case 'w':
3893 opt_embed = EARGF(usage());
3894 break;
3895 case 'v':
3896 default:
3897 usage();
3898 } ARGEND;
3899
3900 run:
3901 setlocale(LC_CTYPE, "");
3902 XSetLocaleModifiers("");
3903 tnew(cols? cols : 1, rows? rows : 1);
3904 xinit();
3905 selinit();
3906 run();
3907
3908 return 0;
3909 }
3910