st.c 73 KB

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  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 <sys/ioctl.h>
  15. #include <sys/select.h>
  16. #include <sys/stat.h>
  17. #include <sys/time.h>
  18. #include <sys/types.h>
  19. #include <sys/wait.h>
  20. #include <time.h>
  21. #include <unistd.h>
  22. #include <X11/Xatom.h>
  23. #include <X11/Xlib.h>
  24. #include <X11/Xutil.h>
  25. #include <X11/cursorfont.h>
  26. #include <X11/keysym.h>
  27. #include <X11/Xft/Xft.h>
  28. #include <fontconfig/fontconfig.h>
  29. #define Glyph Glyph_
  30. #define Font Font_
  31. #define Draw XftDraw *
  32. #define Colour XftColor
  33. #define Colourmap Colormap
  34. #if defined(__linux)
  35. #include <pty.h>
  36. #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  37. #include <util.h>
  38. #elif defined(__FreeBSD__) || defined(__DragonFly__)
  39. #include <libutil.h>
  40. #endif
  41. #define USAGE \
  42. "st " VERSION " (c) 2010-2013 st engineers\n" \
  43. "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
  44. " [-t title] [-w windowid] [-e command ...]\n"
  45. /* XEMBED messages */
  46. #define XEMBED_FOCUS_IN 4
  47. #define XEMBED_FOCUS_OUT 5
  48. /* Arbitrary sizes */
  49. #define UTF_SIZ 4
  50. #define ESC_BUF_SIZ (128*UTF_SIZ)
  51. #define ESC_ARG_SIZ 16
  52. #define STR_BUF_SIZ ESC_BUF_SIZ
  53. #define STR_ARG_SIZ ESC_ARG_SIZ
  54. #define DRAW_BUF_SIZ 20*1024
  55. #define XK_ANY_MOD UINT_MAX
  56. #define XK_NO_MOD 0
  57. #define XK_SWITCH_MOD (1<<13)
  58. #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
  59. /* macros */
  60. #define SERRNO strerror(errno)
  61. #define MIN(a, b) ((a) < (b) ? (a) : (b))
  62. #define MAX(a, b) ((a) < (b) ? (b) : (a))
  63. #define LEN(a) (sizeof(a) / sizeof(a[0]))
  64. #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
  65. #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
  66. #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  67. #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  68. #define IS_SET(flag) ((term.mode & (flag)) != 0)
  69. #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
  70. #define VT102ID "\033[?6c"
  71. enum glyph_attribute {
  72. ATTR_NULL = 0,
  73. ATTR_REVERSE = 1,
  74. ATTR_UNDERLINE = 2,
  75. ATTR_BOLD = 4,
  76. ATTR_GFX = 8,
  77. ATTR_ITALIC = 16,
  78. ATTR_BLINK = 32,
  79. };
  80. enum cursor_movement {
  81. CURSOR_SAVE,
  82. CURSOR_LOAD
  83. };
  84. enum cursor_state {
  85. CURSOR_DEFAULT = 0,
  86. CURSOR_WRAPNEXT = 1,
  87. CURSOR_ORIGIN = 2
  88. };
  89. enum glyph_state {
  90. GLYPH_SET = 1,
  91. GLYPH_DIRTY = 2
  92. };
  93. enum term_mode {
  94. MODE_WRAP = 1,
  95. MODE_INSERT = 2,
  96. MODE_APPKEYPAD = 4,
  97. MODE_ALTSCREEN = 8,
  98. MODE_CRLF = 16,
  99. MODE_MOUSEBTN = 32,
  100. MODE_MOUSEMOTION = 64,
  101. MODE_MOUSE = 32|64,
  102. MODE_REVERSE = 128,
  103. MODE_KBDLOCK = 256,
  104. MODE_HIDE = 512,
  105. MODE_ECHO = 1024,
  106. MODE_APPCURSOR = 2048,
  107. MODE_MOUSESGR = 4096,
  108. };
  109. enum escape_state {
  110. ESC_START = 1,
  111. ESC_CSI = 2,
  112. ESC_STR = 4, /* DSC, OSC, PM, APC */
  113. ESC_ALTCHARSET = 8,
  114. ESC_STR_END = 16, /* a final string was encountered */
  115. ESC_TEST = 32, /* Enter in test mode */
  116. };
  117. enum window_state {
  118. WIN_VISIBLE = 1,
  119. WIN_REDRAW = 2,
  120. WIN_FOCUSED = 4
  121. };
  122. enum selection_type {
  123. SEL_REGULAR = 1,
  124. SEL_RECTANGULAR = 2
  125. };
  126. /* bit macro */
  127. #undef B0
  128. enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
  129. typedef unsigned char uchar;
  130. typedef unsigned int uint;
  131. typedef unsigned long ulong;
  132. typedef unsigned short ushort;
  133. typedef struct {
  134. char c[UTF_SIZ]; /* character code */
  135. uchar mode; /* attribute flags */
  136. ushort fg; /* foreground */
  137. ushort bg; /* background */
  138. uchar state; /* state flags */
  139. } Glyph;
  140. typedef Glyph *Line;
  141. typedef struct {
  142. Glyph attr; /* current char attributes */
  143. int x;
  144. int y;
  145. char state;
  146. } TCursor;
  147. /* CSI Escape sequence structs */
  148. /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  149. typedef struct {
  150. char buf[ESC_BUF_SIZ]; /* raw string */
  151. int len; /* raw string length */
  152. char priv;
  153. int arg[ESC_ARG_SIZ];
  154. int narg; /* nb of args */
  155. char mode;
  156. } CSIEscape;
  157. /* STR Escape sequence structs */
  158. /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
  159. typedef struct {
  160. char type; /* ESC type ... */
  161. char buf[STR_BUF_SIZ]; /* raw string */
  162. int len; /* raw string length */
  163. char *args[STR_ARG_SIZ];
  164. int narg; /* nb of args */
  165. } STREscape;
  166. /* Internal representation of the screen */
  167. typedef struct {
  168. int row; /* nb row */
  169. int col; /* nb col */
  170. Line *line; /* screen */
  171. Line *alt; /* alternate screen */
  172. bool *dirty; /* dirtyness of lines */
  173. TCursor c; /* cursor */
  174. int top; /* top scroll limit */
  175. int bot; /* bottom scroll limit */
  176. int mode; /* terminal mode flags */
  177. int esc; /* escape state flags */
  178. bool numlock; /* lock numbers in keyboard */
  179. bool *tabs;
  180. } Term;
  181. /* Purely graphic info */
  182. typedef struct {
  183. Display *dpy;
  184. Colourmap cmap;
  185. Window win;
  186. Drawable buf;
  187. Atom xembed, wmdeletewin;
  188. XIM xim;
  189. XIC xic;
  190. Draw draw;
  191. Visual *vis;
  192. int scr;
  193. bool isfixed; /* is fixed geometry? */
  194. int fx, fy, fw, fh; /* fixed geometry */
  195. int tw, th; /* tty width and height */
  196. int w, h; /* window width and height */
  197. int ch; /* char height */
  198. int cw; /* char width */
  199. char state; /* focus, redraw, visible */
  200. } XWindow;
  201. typedef struct {
  202. KeySym k;
  203. uint mask;
  204. char s[ESC_BUF_SIZ];
  205. /* three valued logic variables: 0 indifferent, 1 on, -1 off */
  206. signed char appkey; /* application keypad */
  207. signed char appcursor; /* application cursor */
  208. signed char crlf; /* crlf mode */
  209. } Key;
  210. /* TODO: use better name for vars... */
  211. typedef struct {
  212. int mode;
  213. int type;
  214. int bx, by;
  215. int ex, ey;
  216. struct {
  217. int x, y;
  218. } b, e;
  219. char *clip;
  220. Atom xtarget;
  221. bool alt;
  222. struct timeval tclick1;
  223. struct timeval tclick2;
  224. } Selection;
  225. typedef union {
  226. int i;
  227. unsigned int ui;
  228. float f;
  229. const void *v;
  230. } Arg;
  231. typedef struct {
  232. unsigned int mod;
  233. KeySym keysym;
  234. void (*func)(const Arg *);
  235. const Arg arg;
  236. } Shortcut;
  237. /* function definitions used in config.h */
  238. static void clippaste(const Arg *);
  239. static void numlock(const Arg *);
  240. static void selpaste(const Arg *);
  241. static void xzoom(const Arg *);
  242. /* Config.h for applying patches and the configuration. */
  243. #include "config.h"
  244. /* Font structure */
  245. typedef struct {
  246. int height;
  247. int width;
  248. int ascent;
  249. int descent;
  250. short lbearing;
  251. short rbearing;
  252. XftFont *match;
  253. FcFontSet *set;
  254. FcPattern *pattern;
  255. } Font;
  256. /* Drawing Context */
  257. typedef struct {
  258. Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
  259. Font font, bfont, ifont, ibfont;
  260. GC gc;
  261. } DC;
  262. static void die(const char *, ...);
  263. static void draw(void);
  264. static void redraw(int);
  265. static void drawregion(int, int, int, int);
  266. static void execsh(void);
  267. static void sigchld(int);
  268. static void run(void);
  269. static void csidump(void);
  270. static void csihandle(void);
  271. static void csiparse(void);
  272. static void csireset(void);
  273. static void strdump(void);
  274. static void strhandle(void);
  275. static void strparse(void);
  276. static void strreset(void);
  277. static void tclearregion(int, int, int, int, int);
  278. static void tcursor(int);
  279. static void tdeletechar(int);
  280. static void tdeleteline(int);
  281. static void tinsertblank(int);
  282. static void tinsertblankline(int);
  283. static void tmoveto(int, int);
  284. static void tmoveato(int x, int y);
  285. static void tnew(int, int);
  286. static void tnewline(int);
  287. static void tputtab(bool);
  288. static void tputc(char *, int);
  289. static void treset(void);
  290. static int tresize(int, int);
  291. static void tscrollup(int, int);
  292. static void tscrolldown(int, int);
  293. static void tsetattr(int*, int);
  294. static void tsetchar(char *, Glyph *, int, int);
  295. static void tsetscroll(int, int);
  296. static void tswapscreen(void);
  297. static void tsetdirt(int, int);
  298. static void tsetmode(bool, bool, int *, int);
  299. static void tfulldirt(void);
  300. static void techo(char *, int);
  301. static inline bool match(uint, uint);
  302. static void ttynew(void);
  303. static void ttyread(void);
  304. static void ttyresize(void);
  305. static void ttywrite(const char *, size_t);
  306. static void xdraws(char *, Glyph, int, int, int, int);
  307. static void xhints(void);
  308. static void xclear(int, int, int, int);
  309. static void xdrawcursor(void);
  310. static void xinit(void);
  311. static void xloadcols(void);
  312. static int xsetcolorname(int, const char *);
  313. static int xloadfont(Font *, FcPattern *);
  314. static void xloadfonts(char *, int);
  315. static void xsettitle(char *);
  316. static void xresettitle(void);
  317. static void xseturgency(int);
  318. static void xsetsel(char*);
  319. static void xtermclear(int, int, int, int);
  320. static void xunloadfonts(void);
  321. static void xresize(int, int);
  322. static void expose(XEvent *);
  323. static void visibility(XEvent *);
  324. static void unmap(XEvent *);
  325. static char *kmap(KeySym, uint);
  326. static void kpress(XEvent *);
  327. static void cmessage(XEvent *);
  328. static void cresize(int, int);
  329. static void resize(XEvent *);
  330. static void focus(XEvent *);
  331. static void brelease(XEvent *);
  332. static void bpress(XEvent *);
  333. static void bmotion(XEvent *);
  334. static void selnotify(XEvent *);
  335. static void selclear(XEvent *);
  336. static void selrequest(XEvent *);
  337. static void selinit(void);
  338. static inline bool selected(int, int);
  339. static void selcopy(void);
  340. static void selscroll(int, int);
  341. static int utf8decode(char *, long *);
  342. static int utf8encode(long *, char *);
  343. static int utf8size(char *);
  344. static int isfullutf8(char *, int);
  345. static ssize_t xwrite(int, char *, size_t);
  346. static void *xmalloc(size_t);
  347. static void *xrealloc(void *, size_t);
  348. static void *xcalloc(size_t, size_t);
  349. static void (*handler[LASTEvent])(XEvent *) = {
  350. [KeyPress] = kpress,
  351. [ClientMessage] = cmessage,
  352. [ConfigureNotify] = resize,
  353. [VisibilityNotify] = visibility,
  354. [UnmapNotify] = unmap,
  355. [Expose] = expose,
  356. [FocusIn] = focus,
  357. [FocusOut] = focus,
  358. [MotionNotify] = bmotion,
  359. [ButtonPress] = bpress,
  360. [ButtonRelease] = brelease,
  361. [SelectionClear] = selclear,
  362. [SelectionNotify] = selnotify,
  363. [SelectionRequest] = selrequest,
  364. };
  365. /* Globals */
  366. static DC dc;
  367. static XWindow xw;
  368. static Term term;
  369. static CSIEscape csiescseq;
  370. static STREscape strescseq;
  371. static int cmdfd;
  372. static pid_t pid;
  373. static Selection sel;
  374. static int iofd = -1;
  375. static char **opt_cmd = NULL;
  376. static char *opt_io = NULL;
  377. static char *opt_title = NULL;
  378. static char *opt_embed = NULL;
  379. static char *opt_class = NULL;
  380. static char *opt_font = NULL;
  381. static char *usedfont = NULL;
  382. static int usedfontsize = 0;
  383. /* Font Ring Cache */
  384. enum {
  385. FRC_NORMAL,
  386. FRC_ITALIC,
  387. FRC_BOLD,
  388. FRC_ITALICBOLD
  389. };
  390. typedef struct {
  391. XftFont *font;
  392. long c;
  393. int flags;
  394. } Fontcache;
  395. /*
  396. * Fontcache is a ring buffer, with frccur as current position and frclen as
  397. * the current length of used elements.
  398. */
  399. static Fontcache frc[1024];
  400. static int frccur = -1, frclen = 0;
  401. ssize_t
  402. xwrite(int fd, char *s, size_t len) {
  403. size_t aux = len;
  404. while(len > 0) {
  405. ssize_t r = write(fd, s, len);
  406. if(r < 0)
  407. return r;
  408. len -= r;
  409. s += r;
  410. }
  411. return aux;
  412. }
  413. void *
  414. xmalloc(size_t len) {
  415. void *p = malloc(len);
  416. if(!p)
  417. die("Out of memory\n");
  418. return p;
  419. }
  420. void *
  421. xrealloc(void *p, size_t len) {
  422. if((p = realloc(p, len)) == NULL)
  423. die("Out of memory\n");
  424. return p;
  425. }
  426. void *
  427. xcalloc(size_t nmemb, size_t size) {
  428. void *p = calloc(nmemb, size);
  429. if(!p)
  430. die("Out of memory\n");
  431. return p;
  432. }
  433. int
  434. utf8decode(char *s, long *u) {
  435. uchar c;
  436. int i, n, rtn;
  437. rtn = 1;
  438. c = *s;
  439. if(~c & B7) { /* 0xxxxxxx */
  440. *u = c;
  441. return rtn;
  442. } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
  443. *u = c&(B4|B3|B2|B1|B0);
  444. n = 1;
  445. } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
  446. *u = c&(B3|B2|B1|B0);
  447. n = 2;
  448. } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
  449. *u = c & (B2|B1|B0);
  450. n = 3;
  451. } else {
  452. goto invalid;
  453. }
  454. for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
  455. c = *s;
  456. if((c & (B7|B6)) != B7) /* 10xxxxxx */
  457. goto invalid;
  458. *u <<= 6;
  459. *u |= c & (B5|B4|B3|B2|B1|B0);
  460. }
  461. if((n == 1 && *u < 0x80) ||
  462. (n == 2 && *u < 0x800) ||
  463. (n == 3 && *u < 0x10000) ||
  464. (*u >= 0xD800 && *u <= 0xDFFF)) {
  465. goto invalid;
  466. }
  467. return rtn;
  468. invalid:
  469. *u = 0xFFFD;
  470. return rtn;
  471. }
  472. int
  473. utf8encode(long *u, char *s) {
  474. uchar *sp;
  475. ulong uc;
  476. int i, n;
  477. sp = (uchar *)s;
  478. uc = *u;
  479. if(uc < 0x80) {
  480. *sp = uc; /* 0xxxxxxx */
  481. return 1;
  482. } else if(*u < 0x800) {
  483. *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
  484. n = 1;
  485. } else if(uc < 0x10000) {
  486. *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
  487. n = 2;
  488. } else if(uc <= 0x10FFFF) {
  489. *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
  490. n = 3;
  491. } else {
  492. goto invalid;
  493. }
  494. for(i=n,++sp; i>0; --i,++sp)
  495. *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
  496. return n+1;
  497. invalid:
  498. /* U+FFFD */
  499. *s++ = '\xEF';
  500. *s++ = '\xBF';
  501. *s = '\xBD';
  502. return 3;
  503. }
  504. /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
  505. UTF-8 otherwise return 0 */
  506. int
  507. isfullutf8(char *s, int b) {
  508. uchar *c1, *c2, *c3;
  509. c1 = (uchar *)s;
  510. c2 = (uchar *)++s;
  511. c3 = (uchar *)++s;
  512. if(b < 1) {
  513. return 0;
  514. } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
  515. return 0;
  516. } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
  517. ((b == 1) ||
  518. ((b == 2) && (*c2&(B7|B6)) == B7))) {
  519. return 0;
  520. } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
  521. ((b == 1) ||
  522. ((b == 2) && (*c2&(B7|B6)) == B7) ||
  523. ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
  524. return 0;
  525. } else {
  526. return 1;
  527. }
  528. }
  529. int
  530. utf8size(char *s) {
  531. uchar c = *s;
  532. if(~c&B7) {
  533. return 1;
  534. } else if((c&(B7|B6|B5)) == (B7|B6)) {
  535. return 2;
  536. } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
  537. return 3;
  538. } else {
  539. return 4;
  540. }
  541. }
  542. void
  543. selinit(void) {
  544. memset(&sel.tclick1, 0, sizeof(sel.tclick1));
  545. memset(&sel.tclick2, 0, sizeof(sel.tclick2));
  546. sel.mode = 0;
  547. sel.bx = -1;
  548. sel.clip = NULL;
  549. sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
  550. if(sel.xtarget == None)
  551. sel.xtarget = XA_STRING;
  552. }
  553. static int
  554. x2col(int x) {
  555. x -= borderpx;
  556. x /= xw.cw;
  557. return LIMIT(x, 0, term.col-1);
  558. }
  559. static int
  560. y2row(int y) {
  561. y -= borderpx;
  562. y /= xw.ch;
  563. return LIMIT(y, 0, term.row-1);
  564. }
  565. static inline bool
  566. selected(int x, int y) {
  567. int bx, ex;
  568. if(sel.ey == y && sel.by == y) {
  569. bx = MIN(sel.bx, sel.ex);
  570. ex = MAX(sel.bx, sel.ex);
  571. return BETWEEN(x, bx, ex);
  572. }
  573. switch(sel.type) {
  574. case SEL_REGULAR:
  575. return ((sel.b.y < y && y < sel.e.y)
  576. || (y == sel.e.y && x <= sel.e.x))
  577. || (y == sel.b.y && x >= sel.b.x
  578. && (x <= sel.e.x || sel.b.y != sel.e.y));
  579. case SEL_RECTANGULAR:
  580. return ((sel.b.y <= y && y <= sel.e.y)
  581. && (sel.b.x <= x && x <= sel.e.x));
  582. };
  583. }
  584. void
  585. getbuttoninfo(XEvent *e) {
  586. int type;
  587. uint state = e->xbutton.state &~Button1Mask;
  588. sel.alt = IS_SET(MODE_ALTSCREEN);
  589. sel.ex = x2col(e->xbutton.x);
  590. sel.ey = y2row(e->xbutton.y);
  591. sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
  592. sel.b.y = MIN(sel.by, sel.ey);
  593. sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
  594. sel.e.y = MAX(sel.by, sel.ey);
  595. sel.type = SEL_REGULAR;
  596. for(type = 1; type < LEN(selmasks); ++type) {
  597. if(match(selmasks[type], state)) {
  598. sel.type = type;
  599. break;
  600. }
  601. }
  602. }
  603. void
  604. mousereport(XEvent *e) {
  605. int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
  606. button = e->xbutton.button, state = e->xbutton.state,
  607. len;
  608. char buf[40];
  609. static int ob, ox, oy;
  610. /* from urxvt */
  611. if(e->xbutton.type == MotionNotify) {
  612. if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
  613. return;
  614. button = ob + 32;
  615. ox = x, oy = y;
  616. } else if(!IS_SET(MODE_MOUSESGR)
  617. && (e->xbutton.type == ButtonRelease
  618. || button == AnyButton)) {
  619. button = 3;
  620. } else {
  621. button -= Button1;
  622. if(button >= 3)
  623. button += 64 - 3;
  624. if(e->xbutton.type == ButtonPress) {
  625. ob = button;
  626. ox = x, oy = y;
  627. }
  628. }
  629. button += (state & ShiftMask ? 4 : 0)
  630. + (state & Mod4Mask ? 8 : 0)
  631. + (state & ControlMask ? 16 : 0);
  632. len = 0;
  633. if(IS_SET(MODE_MOUSESGR)) {
  634. len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
  635. button, x+1, y+1,
  636. e->xbutton.type == ButtonRelease ? 'm' : 'M');
  637. } else if(x < 223 && y < 223) {
  638. len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
  639. 32+button, 32+x+1, 32+y+1);
  640. } else {
  641. return;
  642. }
  643. ttywrite(buf, len);
  644. }
  645. void
  646. bpress(XEvent *e) {
  647. if(IS_SET(MODE_MOUSE)) {
  648. mousereport(e);
  649. } else if(e->xbutton.button == Button1) {
  650. if(sel.bx != -1) {
  651. sel.bx = -1;
  652. tsetdirt(sel.b.y, sel.e.y);
  653. draw();
  654. }
  655. sel.mode = 1;
  656. sel.type = SEL_REGULAR;
  657. sel.ex = sel.bx = x2col(e->xbutton.x);
  658. sel.ey = sel.by = y2row(e->xbutton.y);
  659. } else if(e->xbutton.button == Button4) {
  660. ttywrite("\031", 1);
  661. } else if(e->xbutton.button == Button5) {
  662. ttywrite("\005", 1);
  663. }
  664. }
  665. void
  666. selcopy(void) {
  667. char *str, *ptr, *p;
  668. int x, y, bufsize, is_selected = 0, size;
  669. Glyph *gp, *last;
  670. if(sel.bx == -1) {
  671. str = NULL;
  672. } else {
  673. bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
  674. ptr = str = xmalloc(bufsize);
  675. /* append every set & selected glyph to the selection */
  676. for(y = sel.b.y; y < sel.e.y + 1; y++) {
  677. is_selected = 0;
  678. gp = &term.line[y][0];
  679. last = gp + term.col;
  680. while(--last >= gp && !(last->state & GLYPH_SET))
  681. /* nothing */;
  682. for(x = 0; gp <= last; x++, ++gp) {
  683. if(!selected(x, y)) {
  684. continue;
  685. } else {
  686. is_selected = 1;
  687. }
  688. p = (gp->state & GLYPH_SET) ? gp->c : " ";
  689. size = utf8size(p);
  690. memcpy(ptr, p, size);
  691. ptr += size;
  692. }
  693. /* \n at the end of every selected line except for the last one */
  694. if(is_selected && y < sel.e.y)
  695. *ptr++ = '\r';
  696. }
  697. *ptr = 0;
  698. }
  699. xsetsel(str);
  700. }
  701. void
  702. selnotify(XEvent *e) {
  703. ulong nitems, ofs, rem;
  704. int format;
  705. uchar *data;
  706. Atom type;
  707. ofs = 0;
  708. do {
  709. if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
  710. False, AnyPropertyType, &type, &format,
  711. &nitems, &rem, &data)) {
  712. fprintf(stderr, "Clipboard allocation failed\n");
  713. return;
  714. }
  715. ttywrite((const char *) data, nitems * format / 8);
  716. XFree(data);
  717. /* number of 32-bit chunks returned */
  718. ofs += nitems * format / 32;
  719. } while(rem > 0);
  720. }
  721. void
  722. selpaste(const Arg *dummy) {
  723. XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
  724. xw.win, CurrentTime);
  725. }
  726. void
  727. clippaste(const Arg *dummy) {
  728. Atom clipboard;
  729. clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
  730. XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
  731. xw.win, CurrentTime);
  732. }
  733. void
  734. selclear(XEvent *e) {
  735. if(sel.bx == -1)
  736. return;
  737. sel.bx = -1;
  738. tsetdirt(sel.b.y, sel.e.y);
  739. }
  740. void
  741. selrequest(XEvent *e) {
  742. XSelectionRequestEvent *xsre;
  743. XSelectionEvent xev;
  744. Atom xa_targets, string;
  745. xsre = (XSelectionRequestEvent *) e;
  746. xev.type = SelectionNotify;
  747. xev.requestor = xsre->requestor;
  748. xev.selection = xsre->selection;
  749. xev.target = xsre->target;
  750. xev.time = xsre->time;
  751. /* reject */
  752. xev.property = None;
  753. xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
  754. if(xsre->target == xa_targets) {
  755. /* respond with the supported type */
  756. string = sel.xtarget;
  757. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  758. XA_ATOM, 32, PropModeReplace,
  759. (uchar *) &string, 1);
  760. xev.property = xsre->property;
  761. } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
  762. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  763. xsre->target, 8, PropModeReplace,
  764. (uchar *) sel.clip, strlen(sel.clip));
  765. xev.property = xsre->property;
  766. }
  767. /* all done, send a notification to the listener */
  768. if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
  769. fprintf(stderr, "Error sending SelectionNotify event\n");
  770. }
  771. void
  772. xsetsel(char *str) {
  773. /* register the selection for both the clipboard and the primary */
  774. Atom clipboard;
  775. free(sel.clip);
  776. sel.clip = str;
  777. XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
  778. clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
  779. XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
  780. }
  781. void
  782. brelease(XEvent *e) {
  783. struct timeval now;
  784. if(IS_SET(MODE_MOUSE)) {
  785. mousereport(e);
  786. return;
  787. }
  788. if(e->xbutton.button == Button2) {
  789. selpaste(NULL);
  790. } else if(e->xbutton.button == Button1) {
  791. sel.mode = 0;
  792. getbuttoninfo(e);
  793. term.dirty[sel.ey] = 1;
  794. if(sel.bx == sel.ex && sel.by == sel.ey) {
  795. sel.bx = -1;
  796. gettimeofday(&now, NULL);
  797. if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
  798. /* triple click on the line */
  799. sel.b.x = sel.bx = 0;
  800. sel.e.x = sel.ex = term.col;
  801. sel.b.y = sel.e.y = sel.ey;
  802. selcopy();
  803. } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
  804. /* double click to select word */
  805. sel.bx = sel.ex;
  806. while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
  807. term.line[sel.ey][sel.bx-1].c[0] != ' ') {
  808. sel.bx--;
  809. }
  810. sel.b.x = sel.bx;
  811. while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
  812. term.line[sel.ey][sel.ex+1].c[0] != ' ') {
  813. sel.ex++;
  814. }
  815. sel.e.x = sel.ex;
  816. sel.b.y = sel.e.y = sel.ey;
  817. selcopy();
  818. }
  819. } else {
  820. selcopy();
  821. }
  822. }
  823. memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
  824. gettimeofday(&sel.tclick1, NULL);
  825. }
  826. void
  827. bmotion(XEvent *e) {
  828. int oldey, oldex, oldsby, oldsey;
  829. if(IS_SET(MODE_MOUSE)) {
  830. mousereport(e);
  831. return;
  832. }
  833. if(!sel.mode)
  834. return;
  835. oldey = sel.ey;
  836. oldex = sel.ex;
  837. oldsby = sel.b.y;
  838. oldsey = sel.e.y;
  839. getbuttoninfo(e);
  840. if(oldey != sel.ey || oldex != sel.ex) {
  841. tsetdirt(MIN(sel.b.y, oldsby), MAX(sel.e.y, oldsey));
  842. }
  843. }
  844. void
  845. die(const char *errstr, ...) {
  846. va_list ap;
  847. va_start(ap, errstr);
  848. vfprintf(stderr, errstr, ap);
  849. va_end(ap);
  850. exit(EXIT_FAILURE);
  851. }
  852. void
  853. execsh(void) {
  854. char **args;
  855. char *envshell = getenv("SHELL");
  856. const struct passwd *pass = getpwuid(getuid());
  857. char buf[sizeof(long) * 8 + 1];
  858. unsetenv("COLUMNS");
  859. unsetenv("LINES");
  860. unsetenv("TERMCAP");
  861. if(pass) {
  862. setenv("LOGNAME", pass->pw_name, 1);
  863. setenv("USER", pass->pw_name, 1);
  864. setenv("SHELL", pass->pw_shell, 0);
  865. setenv("HOME", pass->pw_dir, 0);
  866. }
  867. snprintf(buf, sizeof(buf), "%lu", xw.win);
  868. setenv("WINDOWID", buf, 1);
  869. signal(SIGCHLD, SIG_DFL);
  870. signal(SIGHUP, SIG_DFL);
  871. signal(SIGINT, SIG_DFL);
  872. signal(SIGQUIT, SIG_DFL);
  873. signal(SIGTERM, SIG_DFL);
  874. signal(SIGALRM, SIG_DFL);
  875. DEFAULT(envshell, shell);
  876. setenv("TERM", termname, 1);
  877. args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
  878. execvp(args[0], args);
  879. exit(EXIT_FAILURE);
  880. }
  881. void
  882. sigchld(int a) {
  883. int stat = 0;
  884. if(waitpid(pid, &stat, 0) < 0)
  885. die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
  886. if(WIFEXITED(stat)) {
  887. exit(WEXITSTATUS(stat));
  888. } else {
  889. exit(EXIT_FAILURE);
  890. }
  891. }
  892. void
  893. ttynew(void) {
  894. int m, s;
  895. struct winsize w = {term.row, term.col, 0, 0};
  896. /* seems to work fine on linux, openbsd and freebsd */
  897. if(openpty(&m, &s, NULL, NULL, &w) < 0)
  898. die("openpty failed: %s\n", SERRNO);
  899. switch(pid = fork()) {
  900. case -1:
  901. die("fork failed\n");
  902. break;
  903. case 0:
  904. setsid(); /* create a new process group */
  905. dup2(s, STDIN_FILENO);
  906. dup2(s, STDOUT_FILENO);
  907. dup2(s, STDERR_FILENO);
  908. if(ioctl(s, TIOCSCTTY, NULL) < 0)
  909. die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
  910. close(s);
  911. close(m);
  912. execsh();
  913. break;
  914. default:
  915. close(s);
  916. cmdfd = m;
  917. signal(SIGCHLD, sigchld);
  918. if(opt_io) {
  919. iofd = (!strcmp(opt_io, "-")) ?
  920. STDOUT_FILENO :
  921. open(opt_io, O_WRONLY | O_CREAT, 0666);
  922. if(iofd < 0) {
  923. fprintf(stderr, "Error opening %s:%s\n",
  924. opt_io, strerror(errno));
  925. }
  926. }
  927. }
  928. }
  929. void
  930. dump(char c) {
  931. static int col;
  932. fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
  933. if(++col % 10 == 0)
  934. fprintf(stderr, "\n");
  935. }
  936. void
  937. ttyread(void) {
  938. static char buf[BUFSIZ];
  939. static int buflen = 0;
  940. char *ptr;
  941. char s[UTF_SIZ];
  942. int charsize; /* size of utf8 char in bytes */
  943. long utf8c;
  944. int ret;
  945. /* append read bytes to unprocessed bytes */
  946. if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
  947. die("Couldn't read from shell: %s\n", SERRNO);
  948. /* process every complete utf8 char */
  949. buflen += ret;
  950. ptr = buf;
  951. while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
  952. charsize = utf8decode(ptr, &utf8c);
  953. utf8encode(&utf8c, s);
  954. tputc(s, charsize);
  955. ptr += charsize;
  956. buflen -= charsize;
  957. }
  958. /* keep any uncomplete utf8 char for the next call */
  959. memmove(buf, ptr, buflen);
  960. }
  961. void
  962. ttywrite(const char *s, size_t n) {
  963. if(write(cmdfd, s, n) == -1)
  964. die("write error on tty: %s\n", SERRNO);
  965. }
  966. void
  967. ttyresize(void) {
  968. struct winsize w;
  969. w.ws_row = term.row;
  970. w.ws_col = term.col;
  971. w.ws_xpixel = xw.tw;
  972. w.ws_ypixel = xw.th;
  973. if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
  974. fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
  975. }
  976. void
  977. tsetdirt(int top, int bot) {
  978. int i;
  979. LIMIT(top, 0, term.row-1);
  980. LIMIT(bot, 0, term.row-1);
  981. for(i = top; i <= bot; i++)
  982. term.dirty[i] = 1;
  983. }
  984. void
  985. tfulldirt(void) {
  986. tsetdirt(0, term.row-1);
  987. }
  988. void
  989. tcursor(int mode) {
  990. static TCursor c;
  991. if(mode == CURSOR_SAVE) {
  992. c = term.c;
  993. } else if(mode == CURSOR_LOAD) {
  994. term.c = c;
  995. tmoveto(c.x, c.y);
  996. }
  997. }
  998. void
  999. treset(void) {
  1000. uint i;
  1001. term.c = (TCursor){{
  1002. .mode = ATTR_NULL,
  1003. .fg = defaultfg,
  1004. .bg = defaultbg
  1005. }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
  1006. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  1007. for(i = tabspaces; i < term.col; i += tabspaces)
  1008. term.tabs[i] = 1;
  1009. term.top = 0;
  1010. term.bot = term.row - 1;
  1011. term.mode = MODE_WRAP;
  1012. tclearregion(0, 0, term.col-1, term.row-1, 0);
  1013. tmoveto(0, 0);
  1014. tcursor(CURSOR_SAVE);
  1015. }
  1016. void
  1017. tnew(int col, int row) {
  1018. /* set screen size */
  1019. term.row = row;
  1020. term.col = col;
  1021. term.line = xmalloc(term.row * sizeof(Line));
  1022. term.alt = xmalloc(term.row * sizeof(Line));
  1023. term.dirty = xmalloc(term.row * sizeof(*term.dirty));
  1024. term.tabs = xmalloc(term.col * sizeof(*term.tabs));
  1025. for(row = 0; row < term.row; row++) {
  1026. term.line[row] = xmalloc(term.col * sizeof(Glyph));
  1027. term.alt [row] = xmalloc(term.col * sizeof(Glyph));
  1028. term.dirty[row] = 0;
  1029. }
  1030. term.numlock = 1;
  1031. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  1032. /* setup screen */
  1033. treset();
  1034. }
  1035. void
  1036. tswapscreen(void) {
  1037. Line *tmp = term.line;
  1038. term.line = term.alt;
  1039. term.alt = tmp;
  1040. term.mode ^= MODE_ALTSCREEN;
  1041. tfulldirt();
  1042. }
  1043. void
  1044. tscrolldown(int orig, int n) {
  1045. int i;
  1046. Line temp;
  1047. LIMIT(n, 0, term.bot-orig+1);
  1048. tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
  1049. for(i = term.bot; i >= orig+n; i--) {
  1050. temp = term.line[i];
  1051. term.line[i] = term.line[i-n];
  1052. term.line[i-n] = temp;
  1053. term.dirty[i] = 1;
  1054. term.dirty[i-n] = 1;
  1055. }
  1056. selscroll(orig, n);
  1057. }
  1058. void
  1059. tscrollup(int orig, int n) {
  1060. int i;
  1061. Line temp;
  1062. LIMIT(n, 0, term.bot-orig+1);
  1063. tclearregion(0, orig, term.col-1, orig+n-1, 0);
  1064. for(i = orig; i <= term.bot-n; i++) {
  1065. temp = term.line[i];
  1066. term.line[i] = term.line[i+n];
  1067. term.line[i+n] = temp;
  1068. term.dirty[i] = 1;
  1069. term.dirty[i+n] = 1;
  1070. }
  1071. selscroll(orig, -n);
  1072. }
  1073. void
  1074. selscroll(int orig, int n) {
  1075. if(sel.bx == -1)
  1076. return;
  1077. if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
  1078. if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
  1079. sel.bx = -1;
  1080. return;
  1081. }
  1082. switch(sel.type) {
  1083. case SEL_REGULAR:
  1084. if(sel.by < term.top) {
  1085. sel.by = term.top;
  1086. sel.bx = 0;
  1087. }
  1088. if(sel.ey > term.bot) {
  1089. sel.ey = term.bot;
  1090. sel.ex = term.col;
  1091. }
  1092. break;
  1093. case SEL_RECTANGULAR:
  1094. if(sel.by < term.top)
  1095. sel.by = term.top;
  1096. if(sel.ey > term.bot)
  1097. sel.ey = term.bot;
  1098. break;
  1099. };
  1100. sel.b.y = sel.by, sel.b.x = sel.bx;
  1101. sel.e.y = sel.ey, sel.e.x = sel.ex;
  1102. }
  1103. }
  1104. void
  1105. tnewline(int first_col) {
  1106. int y = term.c.y;
  1107. if(y == term.bot) {
  1108. tscrollup(term.top, 1);
  1109. } else {
  1110. y++;
  1111. }
  1112. tmoveto(first_col ? 0 : term.c.x, y);
  1113. }
  1114. void
  1115. csiparse(void) {
  1116. char *p = csiescseq.buf, *np;
  1117. long int v;
  1118. csiescseq.narg = 0;
  1119. if(*p == '?') {
  1120. csiescseq.priv = 1;
  1121. p++;
  1122. }
  1123. csiescseq.buf[csiescseq.len] = '\0';
  1124. while(p < csiescseq.buf+csiescseq.len) {
  1125. np = NULL;
  1126. v = strtol(p, &np, 10);
  1127. if(np == p)
  1128. v = 0;
  1129. if(v == LONG_MAX || v == LONG_MIN)
  1130. v = -1;
  1131. csiescseq.arg[csiescseq.narg++] = v;
  1132. p = np;
  1133. if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
  1134. break;
  1135. p++;
  1136. }
  1137. csiescseq.mode = *p;
  1138. }
  1139. /* for absolute user moves, when decom is set */
  1140. void
  1141. tmoveato(int x, int y) {
  1142. tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
  1143. }
  1144. void
  1145. tmoveto(int x, int y) {
  1146. int miny, maxy;
  1147. if(term.c.state & CURSOR_ORIGIN) {
  1148. miny = term.top;
  1149. maxy = term.bot;
  1150. } else {
  1151. miny = 0;
  1152. maxy = term.row - 1;
  1153. }
  1154. LIMIT(x, 0, term.col-1);
  1155. LIMIT(y, miny, maxy);
  1156. term.c.state &= ~CURSOR_WRAPNEXT;
  1157. term.c.x = x;
  1158. term.c.y = y;
  1159. }
  1160. void
  1161. tsetchar(char *c, Glyph *attr, int x, int y) {
  1162. static char *vt100_0[62] = { /* 0x41 - 0x7e */
  1163. "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
  1164. 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
  1165. 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
  1166. 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
  1167. "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
  1168. "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
  1169. "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
  1170. "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
  1171. };
  1172. /*
  1173. * The table is proudly stolen from rxvt.
  1174. */
  1175. if(attr->mode & ATTR_GFX) {
  1176. if(c[0] >= 0x41 && c[0] <= 0x7e
  1177. && vt100_0[c[0] - 0x41]) {
  1178. c = vt100_0[c[0] - 0x41];
  1179. }
  1180. }
  1181. term.dirty[y] = 1;
  1182. term.line[y][x] = *attr;
  1183. memcpy(term.line[y][x].c, c, UTF_SIZ);
  1184. term.line[y][x].state |= GLYPH_SET;
  1185. }
  1186. void
  1187. tclearregion(int x1, int y1, int x2, int y2, int bce) {
  1188. int x, y, temp;
  1189. if(x1 > x2)
  1190. temp = x1, x1 = x2, x2 = temp;
  1191. if(y1 > y2)
  1192. temp = y1, y1 = y2, y2 = temp;
  1193. LIMIT(x1, 0, term.col-1);
  1194. LIMIT(x2, 0, term.col-1);
  1195. LIMIT(y1, 0, term.row-1);
  1196. LIMIT(y2, 0, term.row-1);
  1197. for(y = y1; y <= y2; y++) {
  1198. term.dirty[y] = 1;
  1199. for(x = x1; x <= x2; x++) {
  1200. if(bce) {
  1201. term.line[y][x] = term.c.attr;
  1202. memcpy(term.line[y][x].c, " ", 2);
  1203. term.line[y][x].state |= GLYPH_SET;
  1204. } else {
  1205. term.line[y][x].state = 0;
  1206. }
  1207. }
  1208. }
  1209. }
  1210. void
  1211. tdeletechar(int n) {
  1212. int src = term.c.x + n;
  1213. int dst = term.c.x;
  1214. int size = term.col - src;
  1215. term.dirty[term.c.y] = 1;
  1216. if(src >= term.col) {
  1217. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
  1218. return;
  1219. }
  1220. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
  1221. size * sizeof(Glyph));
  1222. tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
  1223. }
  1224. void
  1225. tinsertblank(int n) {
  1226. int src = term.c.x;
  1227. int dst = src + n;
  1228. int size = term.col - dst;
  1229. term.dirty[term.c.y] = 1;
  1230. if(dst >= term.col) {
  1231. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
  1232. return;
  1233. }
  1234. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
  1235. size * sizeof(Glyph));
  1236. tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
  1237. }
  1238. void
  1239. tinsertblankline(int n) {
  1240. if(term.c.y < term.top || term.c.y > term.bot)
  1241. return;
  1242. tscrolldown(term.c.y, n);
  1243. }
  1244. void
  1245. tdeleteline(int n) {
  1246. if(term.c.y < term.top || term.c.y > term.bot)
  1247. return;
  1248. tscrollup(term.c.y, n);
  1249. }
  1250. void
  1251. tsetattr(int *attr, int l) {
  1252. int i;
  1253. for(i = 0; i < l; i++) {
  1254. switch(attr[i]) {
  1255. case 0:
  1256. term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
  1257. | ATTR_ITALIC | ATTR_BLINK);
  1258. term.c.attr.fg = defaultfg;
  1259. term.c.attr.bg = defaultbg;
  1260. break;
  1261. case 1:
  1262. term.c.attr.mode |= ATTR_BOLD;
  1263. break;
  1264. case 3:
  1265. term.c.attr.mode |= ATTR_ITALIC;
  1266. break;
  1267. case 4:
  1268. term.c.attr.mode |= ATTR_UNDERLINE;
  1269. break;
  1270. case 5: /* slow blink */
  1271. case 6: /* rapid blink */
  1272. term.c.attr.mode |= ATTR_BLINK;
  1273. break;
  1274. case 7:
  1275. term.c.attr.mode |= ATTR_REVERSE;
  1276. break;
  1277. case 21:
  1278. case 22:
  1279. term.c.attr.mode &= ~ATTR_BOLD;
  1280. break;
  1281. case 23:
  1282. term.c.attr.mode &= ~ATTR_ITALIC;
  1283. break;
  1284. case 24:
  1285. term.c.attr.mode &= ~ATTR_UNDERLINE;
  1286. break;
  1287. case 25:
  1288. case 26:
  1289. term.c.attr.mode &= ~ATTR_BLINK;
  1290. break;
  1291. case 27:
  1292. term.c.attr.mode &= ~ATTR_REVERSE;
  1293. break;
  1294. case 38:
  1295. if(i + 2 < l && attr[i + 1] == 5) {
  1296. i += 2;
  1297. if(BETWEEN(attr[i], 0, 255)) {
  1298. term.c.attr.fg = attr[i];
  1299. } else {
  1300. fprintf(stderr,
  1301. "erresc: bad fgcolor %d\n",
  1302. attr[i]);
  1303. }
  1304. } else {
  1305. fprintf(stderr,
  1306. "erresc(38): gfx attr %d unknown\n",
  1307. attr[i]);
  1308. }
  1309. break;
  1310. case 39:
  1311. term.c.attr.fg = defaultfg;
  1312. break;
  1313. case 48:
  1314. if(i + 2 < l && attr[i + 1] == 5) {
  1315. i += 2;
  1316. if(BETWEEN(attr[i], 0, 255)) {
  1317. term.c.attr.bg = attr[i];
  1318. } else {
  1319. fprintf(stderr,
  1320. "erresc: bad bgcolor %d\n",
  1321. attr[i]);
  1322. }
  1323. } else {
  1324. fprintf(stderr,
  1325. "erresc(48): gfx attr %d unknown\n",
  1326. attr[i]);
  1327. }
  1328. break;
  1329. case 49:
  1330. term.c.attr.bg = defaultbg;
  1331. break;
  1332. default:
  1333. if(BETWEEN(attr[i], 30, 37)) {
  1334. term.c.attr.fg = attr[i] - 30;
  1335. } else if(BETWEEN(attr[i], 40, 47)) {
  1336. term.c.attr.bg = attr[i] - 40;
  1337. } else if(BETWEEN(attr[i], 90, 97)) {
  1338. term.c.attr.fg = attr[i] - 90 + 8;
  1339. } else if(BETWEEN(attr[i], 100, 107)) {
  1340. term.c.attr.bg = attr[i] - 100 + 8;
  1341. } else {
  1342. fprintf(stderr,
  1343. "erresc(default): gfx attr %d unknown\n",
  1344. attr[i]), csidump();
  1345. }
  1346. break;
  1347. }
  1348. }
  1349. }
  1350. void
  1351. tsetscroll(int t, int b) {
  1352. int temp;
  1353. LIMIT(t, 0, term.row-1);
  1354. LIMIT(b, 0, term.row-1);
  1355. if(t > b) {
  1356. temp = t;
  1357. t = b;
  1358. b = temp;
  1359. }
  1360. term.top = t;
  1361. term.bot = b;
  1362. }
  1363. #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
  1364. void
  1365. tsetmode(bool priv, bool set, int *args, int narg) {
  1366. int *lim, mode;
  1367. bool alt;
  1368. for(lim = args + narg; args < lim; ++args) {
  1369. if(priv) {
  1370. switch(*args) {
  1371. break;
  1372. case 1: /* DECCKM -- Cursor key */
  1373. MODBIT(term.mode, set, MODE_APPCURSOR);
  1374. break;
  1375. case 5: /* DECSCNM -- Reverse video */
  1376. mode = term.mode;
  1377. MODBIT(term.mode, set, MODE_REVERSE);
  1378. if(mode != term.mode)
  1379. redraw(REDRAW_TIMEOUT);
  1380. break;
  1381. case 6: /* DECOM -- Origin */
  1382. MODBIT(term.c.state, set, CURSOR_ORIGIN);
  1383. tmoveato(0, 0);
  1384. break;
  1385. case 7: /* DECAWM -- Auto wrap */
  1386. MODBIT(term.mode, set, MODE_WRAP);
  1387. break;
  1388. case 0: /* Error (IGNORED) */
  1389. case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
  1390. case 3: /* DECCOLM -- Column (IGNORED) */
  1391. case 4: /* DECSCLM -- Scroll (IGNORED) */
  1392. case 8: /* DECARM -- Auto repeat (IGNORED) */
  1393. case 18: /* DECPFF -- Printer feed (IGNORED) */
  1394. case 19: /* DECPEX -- Printer extent (IGNORED) */
  1395. case 42: /* DECNRCM -- National characters (IGNORED) */
  1396. case 12: /* att610 -- Start blinking cursor (IGNORED) */
  1397. break;
  1398. case 25: /* DECTCEM -- Text Cursor Enable Mode */
  1399. MODBIT(term.mode, !set, MODE_HIDE);
  1400. break;
  1401. case 1000: /* 1000,1002: enable xterm mouse report */
  1402. MODBIT(term.mode, set, MODE_MOUSEBTN);
  1403. MODBIT(term.mode, 0, MODE_MOUSEMOTION);
  1404. break;
  1405. case 1002:
  1406. MODBIT(term.mode, set, MODE_MOUSEMOTION);
  1407. MODBIT(term.mode, 0, MODE_MOUSEBTN);
  1408. break;
  1409. case 1006:
  1410. MODBIT(term.mode, set, MODE_MOUSESGR);
  1411. break;
  1412. case 1049: /* = 1047 and 1048 */
  1413. case 47:
  1414. case 1047: {
  1415. alt = IS_SET(MODE_ALTSCREEN);
  1416. if(alt) {
  1417. tclearregion(0, 0, term.col-1,
  1418. term.row-1, 0);
  1419. }
  1420. if(set ^ alt) /* set is always 1 or 0 */
  1421. tswapscreen();
  1422. if(*args != 1049)
  1423. break;
  1424. }
  1425. /* pass through */
  1426. case 1048:
  1427. tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
  1428. break;
  1429. default:
  1430. fprintf(stderr,
  1431. "erresc: unknown private set/reset mode %d\n",
  1432. *args);
  1433. break;
  1434. }
  1435. } else {
  1436. switch(*args) {
  1437. case 0: /* Error (IGNORED) */
  1438. break;
  1439. case 2: /* KAM -- keyboard action */
  1440. MODBIT(term.mode, set, MODE_KBDLOCK);
  1441. break;
  1442. case 4: /* IRM -- Insertion-replacement */
  1443. MODBIT(term.mode, set, MODE_INSERT);
  1444. break;
  1445. case 12: /* SRM -- Send/Receive */
  1446. MODBIT(term.mode, !set, MODE_ECHO);
  1447. break;
  1448. case 20: /* LNM -- Linefeed/new line */
  1449. MODBIT(term.mode, set, MODE_CRLF);
  1450. break;
  1451. default:
  1452. fprintf(stderr,
  1453. "erresc: unknown set/reset mode %d\n",
  1454. *args);
  1455. break;
  1456. }
  1457. }
  1458. }
  1459. }
  1460. #undef MODBIT
  1461. void
  1462. csihandle(void) {
  1463. switch(csiescseq.mode) {
  1464. default:
  1465. unknown:
  1466. fprintf(stderr, "erresc: unknown csi ");
  1467. csidump();
  1468. /* die(""); */
  1469. break;
  1470. case '@': /* ICH -- Insert <n> blank char */
  1471. DEFAULT(csiescseq.arg[0], 1);
  1472. tinsertblank(csiescseq.arg[0]);
  1473. break;
  1474. case 'A': /* CUU -- Cursor <n> Up */
  1475. DEFAULT(csiescseq.arg[0], 1);
  1476. tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
  1477. break;
  1478. case 'B': /* CUD -- Cursor <n> Down */
  1479. case 'e': /* VPR --Cursor <n> Down */
  1480. DEFAULT(csiescseq.arg[0], 1);
  1481. tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
  1482. break;
  1483. case 'c': /* DA -- Device Attributes */
  1484. if(csiescseq.arg[0] == 0)
  1485. ttywrite(VT102ID, sizeof(VT102ID) - 1);
  1486. break;
  1487. case 'C': /* CUF -- Cursor <n> Forward */
  1488. case 'a': /* HPR -- Cursor <n> Forward */
  1489. DEFAULT(csiescseq.arg[0], 1);
  1490. tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
  1491. break;
  1492. case 'D': /* CUB -- Cursor <n> Backward */
  1493. DEFAULT(csiescseq.arg[0], 1);
  1494. tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
  1495. break;
  1496. case 'E': /* CNL -- Cursor <n> Down and first col */
  1497. DEFAULT(csiescseq.arg[0], 1);
  1498. tmoveto(0, term.c.y+csiescseq.arg[0]);
  1499. break;
  1500. case 'F': /* CPL -- Cursor <n> Up and first col */
  1501. DEFAULT(csiescseq.arg[0], 1);
  1502. tmoveto(0, term.c.y-csiescseq.arg[0]);
  1503. break;
  1504. case 'g': /* TBC -- Tabulation clear */
  1505. switch(csiescseq.arg[0]) {
  1506. case 0: /* clear current tab stop */
  1507. term.tabs[term.c.x] = 0;
  1508. break;
  1509. case 3: /* clear all the tabs */
  1510. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  1511. break;
  1512. default:
  1513. goto unknown;
  1514. }
  1515. break;
  1516. case 'G': /* CHA -- Move to <col> */
  1517. case '`': /* HPA */
  1518. DEFAULT(csiescseq.arg[0], 1);
  1519. tmoveto(csiescseq.arg[0]-1, term.c.y);
  1520. break;
  1521. case 'H': /* CUP -- Move to <row> <col> */
  1522. case 'f': /* HVP */
  1523. DEFAULT(csiescseq.arg[0], 1);
  1524. DEFAULT(csiescseq.arg[1], 1);
  1525. tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
  1526. break;
  1527. case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
  1528. DEFAULT(csiescseq.arg[0], 1);
  1529. while(csiescseq.arg[0]--)
  1530. tputtab(1);
  1531. break;
  1532. case 'J': /* ED -- Clear screen */
  1533. sel.bx = -1;
  1534. switch(csiescseq.arg[0]) {
  1535. case 0: /* below */
  1536. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
  1537. if(term.c.y < term.row-1) {
  1538. tclearregion(0, term.c.y+1, term.col-1,
  1539. term.row-1, 1);
  1540. }
  1541. break;
  1542. case 1: /* above */
  1543. if(term.c.y > 1)
  1544. tclearregion(0, 0, term.col-1, term.c.y-1, 1);
  1545. tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
  1546. break;
  1547. case 2: /* all */
  1548. tclearregion(0, 0, term.col-1, term.row-1, 1);
  1549. break;
  1550. default:
  1551. goto unknown;
  1552. }
  1553. break;
  1554. case 'K': /* EL -- Clear line */
  1555. switch(csiescseq.arg[0]) {
  1556. case 0: /* right */
  1557. tclearregion(term.c.x, term.c.y, term.col-1,
  1558. term.c.y, 1);
  1559. break;
  1560. case 1: /* left */
  1561. tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
  1562. break;
  1563. case 2: /* all */
  1564. tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
  1565. break;
  1566. }
  1567. break;
  1568. case 'S': /* SU -- Scroll <n> line up */
  1569. DEFAULT(csiescseq.arg[0], 1);
  1570. tscrollup(term.top, csiescseq.arg[0]);
  1571. break;
  1572. case 'T': /* SD -- Scroll <n> line down */
  1573. DEFAULT(csiescseq.arg[0], 1);
  1574. tscrolldown(term.top, csiescseq.arg[0]);
  1575. break;
  1576. case 'L': /* IL -- Insert <n> blank lines */
  1577. DEFAULT(csiescseq.arg[0], 1);
  1578. tinsertblankline(csiescseq.arg[0]);
  1579. break;
  1580. case 'l': /* RM -- Reset Mode */
  1581. tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
  1582. break;
  1583. case 'M': /* DL -- Delete <n> lines */
  1584. DEFAULT(csiescseq.arg[0], 1);
  1585. tdeleteline(csiescseq.arg[0]);
  1586. break;
  1587. case 'X': /* ECH -- Erase <n> char */
  1588. DEFAULT(csiescseq.arg[0], 1);
  1589. tclearregion(term.c.x, term.c.y,
  1590. term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
  1591. break;
  1592. case 'P': /* DCH -- Delete <n> char */
  1593. DEFAULT(csiescseq.arg[0], 1);
  1594. tdeletechar(csiescseq.arg[0]);
  1595. break;
  1596. case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
  1597. DEFAULT(csiescseq.arg[0], 1);
  1598. while(csiescseq.arg[0]--)
  1599. tputtab(0);
  1600. break;
  1601. case 'd': /* VPA -- Move to <row> */
  1602. DEFAULT(csiescseq.arg[0], 1);
  1603. tmoveato(term.c.x, csiescseq.arg[0]-1);
  1604. break;
  1605. case 'h': /* SM -- Set terminal mode */
  1606. tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
  1607. break;
  1608. case 'm': /* SGR -- Terminal attribute (color) */
  1609. tsetattr(csiescseq.arg, csiescseq.narg);
  1610. break;
  1611. case 'r': /* DECSTBM -- Set Scrolling Region */
  1612. if(csiescseq.priv) {
  1613. goto unknown;
  1614. } else {
  1615. DEFAULT(csiescseq.arg[0], 1);
  1616. DEFAULT(csiescseq.arg[1], term.row);
  1617. tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
  1618. tmoveato(0, 0);
  1619. }
  1620. break;
  1621. case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
  1622. tcursor(CURSOR_SAVE);
  1623. break;
  1624. case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
  1625. tcursor(CURSOR_LOAD);
  1626. break;
  1627. }
  1628. }
  1629. void
  1630. csidump(void) {
  1631. int i;
  1632. uint c;
  1633. printf("ESC[");
  1634. for(i = 0; i < csiescseq.len; i++) {
  1635. c = csiescseq.buf[i] & 0xff;
  1636. if(isprint(c)) {
  1637. putchar(c);
  1638. } else if(c == '\n') {
  1639. printf("(\\n)");
  1640. } else if(c == '\r') {
  1641. printf("(\\r)");
  1642. } else if(c == 0x1b) {
  1643. printf("(\\e)");
  1644. } else {
  1645. printf("(%02x)", c);
  1646. }
  1647. }
  1648. putchar('\n');
  1649. }
  1650. void
  1651. csireset(void) {
  1652. memset(&csiescseq, 0, sizeof(csiescseq));
  1653. }
  1654. void
  1655. strhandle(void) {
  1656. char *p = NULL;
  1657. int i, j, narg;
  1658. strparse();
  1659. narg = strescseq.narg;
  1660. switch(strescseq.type) {
  1661. case ']': /* OSC -- Operating System Command */
  1662. switch(i = atoi(strescseq.args[0])) {
  1663. case 0:
  1664. case 1:
  1665. case 2:
  1666. if(narg > 1)
  1667. xsettitle(strescseq.args[1]);
  1668. break;
  1669. case 4: /* color set */
  1670. if(narg < 3)
  1671. break;
  1672. p = strescseq.args[2];
  1673. /* fall through */
  1674. case 104: /* color reset, here p = NULL */
  1675. j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
  1676. if (!xsetcolorname(j, p)) {
  1677. fprintf(stderr, "erresc: invalid color %s\n", p);
  1678. } else {
  1679. /*
  1680. * TODO if defaultbg color is changed, borders
  1681. * are dirty
  1682. */
  1683. redraw(0);
  1684. }
  1685. break;
  1686. default:
  1687. fprintf(stderr, "erresc: unknown str ");
  1688. strdump();
  1689. break;
  1690. }
  1691. break;
  1692. case 'k': /* old title set compatibility */
  1693. xsettitle(strescseq.args[0]);
  1694. break;
  1695. case 'P': /* DSC -- Device Control String */
  1696. case '_': /* APC -- Application Program Command */
  1697. case '^': /* PM -- Privacy Message */
  1698. default:
  1699. fprintf(stderr, "erresc: unknown str ");
  1700. strdump();
  1701. /* die(""); */
  1702. break;
  1703. }
  1704. }
  1705. void
  1706. strparse(void) {
  1707. char *p = strescseq.buf;
  1708. strescseq.narg = 0;
  1709. strescseq.buf[strescseq.len] = '\0';
  1710. while(p && strescseq.narg < STR_ARG_SIZ)
  1711. strescseq.args[strescseq.narg++] = strsep(&p, ";");
  1712. }
  1713. void
  1714. strdump(void) {
  1715. int i;
  1716. uint c;
  1717. printf("ESC%c", strescseq.type);
  1718. for(i = 0; i < strescseq.len; i++) {
  1719. c = strescseq.buf[i] & 0xff;
  1720. if(c == '\0') {
  1721. return;
  1722. } else if(isprint(c)) {
  1723. putchar(c);
  1724. } else if(c == '\n') {
  1725. printf("(\\n)");
  1726. } else if(c == '\r') {
  1727. printf("(\\r)");
  1728. } else if(c == 0x1b) {
  1729. printf("(\\e)");
  1730. } else {
  1731. printf("(%02x)", c);
  1732. }
  1733. }
  1734. printf("ESC\\\n");
  1735. }
  1736. void
  1737. strreset(void) {
  1738. memset(&strescseq, 0, sizeof(strescseq));
  1739. }
  1740. void
  1741. tputtab(bool forward) {
  1742. uint x = term.c.x;
  1743. if(forward) {
  1744. if(x == term.col)
  1745. return;
  1746. for(++x; x < term.col && !term.tabs[x]; ++x)
  1747. /* nothing */ ;
  1748. } else {
  1749. if(x == 0)
  1750. return;
  1751. for(--x; x > 0 && !term.tabs[x]; --x)
  1752. /* nothing */ ;
  1753. }
  1754. tmoveto(x, term.c.y);
  1755. }
  1756. void
  1757. techo(char *buf, int len) {
  1758. for(; len > 0; buf++, len--) {
  1759. char c = *buf;
  1760. if(c == '\033') { /* escape */
  1761. tputc("^", 1);
  1762. tputc("[", 1);
  1763. } else if(c < '\x20') { /* control code */
  1764. if(c != '\n' && c != '\r' && c != '\t') {
  1765. c |= '\x40';
  1766. tputc("^", 1);
  1767. }
  1768. tputc(&c, 1);
  1769. } else {
  1770. break;
  1771. }
  1772. }
  1773. if(len)
  1774. tputc(buf, len);
  1775. }
  1776. void
  1777. tputc(char *c, int len) {
  1778. uchar ascii = *c;
  1779. bool control = ascii < '\x20' || ascii == 0177;
  1780. if(iofd != -1) {
  1781. if(xwrite(iofd, c, len) < 0) {
  1782. fprintf(stderr, "Error writing in %s:%s\n",
  1783. opt_io, strerror(errno));
  1784. close(iofd);
  1785. iofd = -1;
  1786. }
  1787. }
  1788. /*
  1789. * STR sequences must be checked before anything else
  1790. * because it can use some control codes as part of the sequence.
  1791. */
  1792. if(term.esc & ESC_STR) {
  1793. switch(ascii) {
  1794. case '\033':
  1795. term.esc = ESC_START | ESC_STR_END;
  1796. break;
  1797. case '\a': /* backwards compatibility to xterm */
  1798. term.esc = 0;
  1799. strhandle();
  1800. break;
  1801. default:
  1802. if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
  1803. memmove(&strescseq.buf[strescseq.len], c, len);
  1804. strescseq.len += len;
  1805. } else {
  1806. /*
  1807. * Here is a bug in terminals. If the user never sends
  1808. * some code to stop the str or esc command, then st
  1809. * will stop responding. But this is better than
  1810. * silently failing with unknown characters. At least
  1811. * then users will report back.
  1812. *
  1813. * In the case users ever get fixed, here is the code:
  1814. */
  1815. /*
  1816. * term.esc = 0;
  1817. * strhandle();
  1818. */
  1819. }
  1820. }
  1821. return;
  1822. }
  1823. /*
  1824. * Actions of control codes must be performed as soon they arrive
  1825. * because they can be embedded inside a control sequence, and
  1826. * they must not cause conflicts with sequences.
  1827. */
  1828. if(control) {
  1829. switch(ascii) {
  1830. case '\t': /* HT */
  1831. tputtab(1);
  1832. return;
  1833. case '\b': /* BS */
  1834. tmoveto(term.c.x-1, term.c.y);
  1835. return;
  1836. case '\r': /* CR */
  1837. tmoveto(0, term.c.y);
  1838. return;
  1839. case '\f': /* LF */
  1840. case '\v': /* VT */
  1841. case '\n': /* LF */
  1842. /* go to first col if the mode is set */
  1843. tnewline(IS_SET(MODE_CRLF));
  1844. return;
  1845. case '\a': /* BEL */
  1846. if(!(xw.state & WIN_FOCUSED))
  1847. xseturgency(1);
  1848. return;
  1849. case '\033': /* ESC */
  1850. csireset();
  1851. term.esc = ESC_START;
  1852. return;
  1853. case '\016': /* SO */
  1854. case '\017': /* SI */
  1855. /*
  1856. * Different charsets are hard to handle. Applications
  1857. * should use the right alt charset escapes for the
  1858. * only reason they still exist: line drawing. The
  1859. * rest is incompatible history st should not support.
  1860. */
  1861. return;
  1862. case '\032': /* SUB */
  1863. case '\030': /* CAN */
  1864. csireset();
  1865. return;
  1866. case '\005': /* ENQ (IGNORED) */
  1867. case '\000': /* NUL (IGNORED) */
  1868. case '\021': /* XON (IGNORED) */
  1869. case '\023': /* XOFF (IGNORED) */
  1870. case 0177: /* DEL (IGNORED) */
  1871. return;
  1872. }
  1873. } else if(term.esc & ESC_START) {
  1874. if(term.esc & ESC_CSI) {
  1875. csiescseq.buf[csiescseq.len++] = ascii;
  1876. if(BETWEEN(ascii, 0x40, 0x7E)
  1877. || csiescseq.len >= \
  1878. sizeof(csiescseq.buf)-1) {
  1879. term.esc = 0;
  1880. csiparse();
  1881. csihandle();
  1882. }
  1883. } else if(term.esc & ESC_STR_END) {
  1884. term.esc = 0;
  1885. if(ascii == '\\')
  1886. strhandle();
  1887. } else if(term.esc & ESC_ALTCHARSET) {
  1888. switch(ascii) {
  1889. case '0': /* Line drawing set */
  1890. term.c.attr.mode |= ATTR_GFX;
  1891. break;
  1892. case 'B': /* USASCII */
  1893. term.c.attr.mode &= ~ATTR_GFX;
  1894. break;
  1895. case 'A': /* UK (IGNORED) */
  1896. case '<': /* multinational charset (IGNORED) */
  1897. case '5': /* Finnish (IGNORED) */
  1898. case 'C': /* Finnish (IGNORED) */
  1899. case 'K': /* German (IGNORED) */
  1900. break;
  1901. default:
  1902. fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
  1903. }
  1904. term.esc = 0;
  1905. } else if(term.esc & ESC_TEST) {
  1906. if(ascii == '8') { /* DEC screen alignment test. */
  1907. char E[UTF_SIZ] = "E";
  1908. int x, y;
  1909. for(x = 0; x < term.col; ++x) {
  1910. for(y = 0; y < term.row; ++y)
  1911. tsetchar(E, &term.c.attr, x, y);
  1912. }
  1913. }
  1914. term.esc = 0;
  1915. } else {
  1916. switch(ascii) {
  1917. case '[':
  1918. term.esc |= ESC_CSI;
  1919. break;
  1920. case '#':
  1921. term.esc |= ESC_TEST;
  1922. break;
  1923. case 'P': /* DCS -- Device Control String */
  1924. case '_': /* APC -- Application Program Command */
  1925. case '^': /* PM -- Privacy Message */
  1926. case ']': /* OSC -- Operating System Command */
  1927. case 'k': /* old title set compatibility */
  1928. strreset();
  1929. strescseq.type = ascii;
  1930. term.esc |= ESC_STR;
  1931. break;
  1932. case '(': /* set primary charset G0 */
  1933. term.esc |= ESC_ALTCHARSET;
  1934. break;
  1935. case ')': /* set secondary charset G1 (IGNORED) */
  1936. case '*': /* set tertiary charset G2 (IGNORED) */
  1937. case '+': /* set quaternary charset G3 (IGNORED) */
  1938. term.esc = 0;
  1939. break;
  1940. case 'D': /* IND -- Linefeed */
  1941. if(term.c.y == term.bot) {
  1942. tscrollup(term.top, 1);
  1943. } else {
  1944. tmoveto(term.c.x, term.c.y+1);
  1945. }
  1946. term.esc = 0;
  1947. break;
  1948. case 'E': /* NEL -- Next line */
  1949. tnewline(1); /* always go to first col */
  1950. term.esc = 0;
  1951. break;
  1952. case 'H': /* HTS -- Horizontal tab stop */
  1953. term.tabs[term.c.x] = 1;
  1954. term.esc = 0;
  1955. break;
  1956. case 'M': /* RI -- Reverse index */
  1957. if(term.c.y == term.top) {
  1958. tscrolldown(term.top, 1);
  1959. } else {
  1960. tmoveto(term.c.x, term.c.y-1);
  1961. }
  1962. term.esc = 0;
  1963. break;
  1964. case 'Z': /* DECID -- Identify Terminal */
  1965. ttywrite(VT102ID, sizeof(VT102ID) - 1);
  1966. term.esc = 0;
  1967. break;
  1968. case 'c': /* RIS -- Reset to inital state */
  1969. treset();
  1970. term.esc = 0;
  1971. xresettitle();
  1972. break;
  1973. case '=': /* DECPAM -- Application keypad */
  1974. term.mode |= MODE_APPKEYPAD;
  1975. term.esc = 0;
  1976. break;
  1977. case '>': /* DECPNM -- Normal keypad */
  1978. term.mode &= ~MODE_APPKEYPAD;
  1979. term.esc = 0;
  1980. break;
  1981. case '7': /* DECSC -- Save Cursor */
  1982. tcursor(CURSOR_SAVE);
  1983. term.esc = 0;
  1984. break;
  1985. case '8': /* DECRC -- Restore Cursor */
  1986. tcursor(CURSOR_LOAD);
  1987. term.esc = 0;
  1988. break;
  1989. case '\\': /* ST -- Stop */
  1990. term.esc = 0;
  1991. break;
  1992. default:
  1993. fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
  1994. (uchar) ascii, isprint(ascii)? ascii:'.');
  1995. term.esc = 0;
  1996. }
  1997. }
  1998. /*
  1999. * All characters which form part of a sequence are not
  2000. * printed
  2001. */
  2002. return;
  2003. }
  2004. /*
  2005. * Display control codes only if we are in graphic mode
  2006. */
  2007. if(control && !(term.c.attr.mode & ATTR_GFX))
  2008. return;
  2009. if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
  2010. sel.bx = -1;
  2011. if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
  2012. tnewline(1); /* always go to first col */
  2013. if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
  2014. memmove(&term.line[term.c.y][term.c.x+1],
  2015. &term.line[term.c.y][term.c.x],
  2016. (term.col - term.c.x - 1) * sizeof(Glyph));
  2017. }
  2018. tsetchar(c, &term.c.attr, term.c.x, term.c.y);
  2019. if(term.c.x+1 < term.col) {
  2020. tmoveto(term.c.x+1, term.c.y);
  2021. } else {
  2022. term.c.state |= CURSOR_WRAPNEXT;
  2023. }
  2024. }
  2025. int
  2026. tresize(int col, int row) {
  2027. int i, x;
  2028. int minrow = MIN(row, term.row);
  2029. int mincol = MIN(col, term.col);
  2030. int slide = term.c.y - row + 1;
  2031. bool *bp;
  2032. if(col < 1 || row < 1)
  2033. return 0;
  2034. /* free unneeded rows */
  2035. i = 0;
  2036. if(slide > 0) {
  2037. /*
  2038. * slide screen to keep cursor where we expect it -
  2039. * tscrollup would work here, but we can optimize to
  2040. * memmove because we're freeing the earlier lines
  2041. */
  2042. for(/* i = 0 */; i < slide; i++) {
  2043. free(term.line[i]);
  2044. free(term.alt[i]);
  2045. }
  2046. memmove(term.line, term.line + slide, row * sizeof(Line));
  2047. memmove(term.alt, term.alt + slide, row * sizeof(Line));
  2048. }
  2049. for(i += row; i < term.row; i++) {
  2050. free(term.line[i]);
  2051. free(term.alt[i]);
  2052. }
  2053. /* resize to new height */
  2054. term.line = xrealloc(term.line, row * sizeof(Line));
  2055. term.alt = xrealloc(term.alt, row * sizeof(Line));
  2056. term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
  2057. term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
  2058. /* resize each row to new width, zero-pad if needed */
  2059. for(i = 0; i < minrow; i++) {
  2060. term.dirty[i] = 1;
  2061. term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
  2062. term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
  2063. for(x = mincol; x < col; x++) {
  2064. term.line[i][x].state = 0;
  2065. term.alt[i][x].state = 0;
  2066. }
  2067. }
  2068. /* allocate any new rows */
  2069. for(/* i == minrow */; i < row; i++) {
  2070. term.dirty[i] = 1;
  2071. term.line[i] = xcalloc(col, sizeof(Glyph));
  2072. term.alt [i] = xcalloc(col, sizeof(Glyph));
  2073. }
  2074. if(col > term.col) {
  2075. bp = term.tabs + term.col;
  2076. memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
  2077. while(--bp > term.tabs && !*bp)
  2078. /* nothing */ ;
  2079. for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
  2080. *bp = 1;
  2081. }
  2082. /* update terminal size */
  2083. term.col = col;
  2084. term.row = row;
  2085. /* reset scrolling region */
  2086. tsetscroll(0, row-1);
  2087. /* make use of the LIMIT in tmoveto */
  2088. tmoveto(term.c.x, term.c.y);
  2089. return (slide > 0);
  2090. }
  2091. void
  2092. xresize(int col, int row) {
  2093. xw.tw = MAX(1, col * xw.cw);
  2094. xw.th = MAX(1, row * xw.ch);
  2095. XFreePixmap(xw.dpy, xw.buf);
  2096. xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
  2097. DefaultDepth(xw.dpy, xw.scr));
  2098. XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
  2099. XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
  2100. XftDrawChange(xw.draw, xw.buf);
  2101. }
  2102. static inline ushort
  2103. sixd_to_16bit(int x) {
  2104. return x == 0 ? 0 : 0x3737 + 0x2828 * x;
  2105. }
  2106. void
  2107. xloadcols(void) {
  2108. int i, r, g, b;
  2109. XRenderColor color = { .alpha = 0xffff };
  2110. /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
  2111. for(i = 0; i < LEN(colorname); i++) {
  2112. if(!colorname[i])
  2113. continue;
  2114. if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
  2115. die("Could not allocate color '%s'\n", colorname[i]);
  2116. }
  2117. }
  2118. /* load colors [16-255] ; same colors as xterm */
  2119. for(i = 16, r = 0; r < 6; r++) {
  2120. for(g = 0; g < 6; g++) {
  2121. for(b = 0; b < 6; b++) {
  2122. color.red = sixd_to_16bit(r);
  2123. color.green = sixd_to_16bit(g);
  2124. color.blue = sixd_to_16bit(b);
  2125. if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
  2126. die("Could not allocate color %d\n", i);
  2127. }
  2128. i++;
  2129. }
  2130. }
  2131. }
  2132. for(r = 0; r < 24; r++, i++) {
  2133. color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
  2134. if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
  2135. &dc.col[i])) {
  2136. die("Could not allocate color %d\n", i);
  2137. }
  2138. }
  2139. }
  2140. int
  2141. xsetcolorname(int x, const char *name) {
  2142. XRenderColor color = { .alpha = 0xffff };
  2143. Colour colour;
  2144. if (x < 0 || x > LEN(colorname))
  2145. return -1;
  2146. if(!name) {
  2147. if(16 <= x && x < 16 + 216) {
  2148. int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
  2149. color.red = sixd_to_16bit(r);
  2150. color.green = sixd_to_16bit(g);
  2151. color.blue = sixd_to_16bit(b);
  2152. if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
  2153. return 0; /* something went wrong */
  2154. dc.col[x] = colour;
  2155. return 1;
  2156. } else if (16 + 216 <= x && x < 256) {
  2157. color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
  2158. if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
  2159. return 0; /* something went wrong */
  2160. dc.col[x] = colour;
  2161. return 1;
  2162. } else {
  2163. name = colorname[x];
  2164. }
  2165. }
  2166. if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
  2167. return 0;
  2168. dc.col[x] = colour;
  2169. return 1;
  2170. }
  2171. void
  2172. xtermclear(int col1, int row1, int col2, int row2) {
  2173. XftDrawRect(xw.draw,
  2174. &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
  2175. borderpx + col1 * xw.cw,
  2176. borderpx + row1 * xw.ch,
  2177. (col2-col1+1) * xw.cw,
  2178. (row2-row1+1) * xw.ch);
  2179. }
  2180. /*
  2181. * Absolute coordinates.
  2182. */
  2183. void
  2184. xclear(int x1, int y1, int x2, int y2) {
  2185. XftDrawRect(xw.draw,
  2186. &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
  2187. x1, y1, x2-x1, y2-y1);
  2188. }
  2189. void
  2190. xhints(void) {
  2191. XClassHint class = {opt_class ? opt_class : termname, termname};
  2192. XWMHints wm = {.flags = InputHint, .input = 1};
  2193. XSizeHints *sizeh = NULL;
  2194. sizeh = XAllocSizeHints();
  2195. if(xw.isfixed == False) {
  2196. sizeh->flags = PSize | PResizeInc | PBaseSize;
  2197. sizeh->height = xw.h;
  2198. sizeh->width = xw.w;
  2199. sizeh->height_inc = xw.ch;
  2200. sizeh->width_inc = xw.cw;
  2201. sizeh->base_height = 2 * borderpx;
  2202. sizeh->base_width = 2 * borderpx;
  2203. } else {
  2204. sizeh->flags = PMaxSize | PMinSize;
  2205. sizeh->min_width = sizeh->max_width = xw.fw;
  2206. sizeh->min_height = sizeh->max_height = xw.fh;
  2207. }
  2208. XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
  2209. XFree(sizeh);
  2210. }
  2211. int
  2212. xloadfont(Font *f, FcPattern *pattern) {
  2213. FcPattern *match;
  2214. FcResult result;
  2215. match = FcFontMatch(NULL, pattern, &result);
  2216. if(!match)
  2217. return 1;
  2218. if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
  2219. FcPatternDestroy(match);
  2220. return 1;
  2221. }
  2222. if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
  2223. FcPatternDestroy(match);
  2224. return 1;
  2225. }
  2226. f->pattern = FcPatternDuplicate(pattern);
  2227. f->ascent = f->match->ascent;
  2228. f->descent = f->match->descent;
  2229. f->lbearing = 0;
  2230. f->rbearing = f->match->max_advance_width;
  2231. f->height = f->ascent + f->descent;
  2232. f->width = f->lbearing + f->rbearing;
  2233. return 0;
  2234. }
  2235. void
  2236. xloadfonts(char *fontstr, int fontsize) {
  2237. FcPattern *pattern;
  2238. FcResult result;
  2239. double fontval;
  2240. if(fontstr[0] == '-') {
  2241. pattern = XftXlfdParse(fontstr, False, False);
  2242. } else {
  2243. pattern = FcNameParse((FcChar8 *)fontstr);
  2244. }
  2245. if(!pattern)
  2246. die("st: can't open font %s\n", fontstr);
  2247. if(fontsize > 0) {
  2248. FcPatternDel(pattern, FC_PIXEL_SIZE);
  2249. FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
  2250. usedfontsize = fontsize;
  2251. } else {
  2252. result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
  2253. if(result == FcResultMatch) {
  2254. usedfontsize = (int)fontval;
  2255. } else {
  2256. /*
  2257. * Default font size is 12, if none given. This is to
  2258. * have a known usedfontsize value.
  2259. */
  2260. FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
  2261. usedfontsize = 12;
  2262. }
  2263. }
  2264. FcConfigSubstitute(0, pattern, FcMatchPattern);
  2265. FcDefaultSubstitute(pattern);
  2266. if(xloadfont(&dc.font, pattern))
  2267. die("st: can't open font %s\n", fontstr);
  2268. /* Setting character width and height. */
  2269. xw.cw = dc.font.width;
  2270. xw.ch = dc.font.height;
  2271. FcPatternDel(pattern, FC_SLANT);
  2272. FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
  2273. if(xloadfont(&dc.ifont, pattern))
  2274. die("st: can't open font %s\n", fontstr);
  2275. FcPatternDel(pattern, FC_WEIGHT);
  2276. FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
  2277. if(xloadfont(&dc.ibfont, pattern))
  2278. die("st: can't open font %s\n", fontstr);
  2279. FcPatternDel(pattern, FC_SLANT);
  2280. FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
  2281. if(xloadfont(&dc.bfont, pattern))
  2282. die("st: can't open font %s\n", fontstr);
  2283. FcPatternDestroy(pattern);
  2284. }
  2285. void
  2286. xunloadfonts(void) {
  2287. int i, ip;
  2288. /*
  2289. * Free the loaded fonts in the font cache. This is done backwards
  2290. * from the frccur.
  2291. */
  2292. for(i = 0, ip = frccur; i < frclen; i++, ip--) {
  2293. if(ip < 0)
  2294. ip = LEN(frc) - 1;
  2295. XftFontClose(xw.dpy, frc[ip].font);
  2296. }
  2297. frccur = -1;
  2298. frclen = 0;
  2299. XftFontClose(xw.dpy, dc.font.match);
  2300. FcPatternDestroy(dc.font.pattern);
  2301. FcFontSetDestroy(dc.font.set);
  2302. XftFontClose(xw.dpy, dc.bfont.match);
  2303. FcPatternDestroy(dc.bfont.pattern);
  2304. FcFontSetDestroy(dc.bfont.set);
  2305. XftFontClose(xw.dpy, dc.ifont.match);
  2306. FcPatternDestroy(dc.ifont.pattern);
  2307. FcFontSetDestroy(dc.ifont.set);
  2308. XftFontClose(xw.dpy, dc.ibfont.match);
  2309. FcPatternDestroy(dc.ibfont.pattern);
  2310. FcFontSetDestroy(dc.ibfont.set);
  2311. }
  2312. void
  2313. xzoom(const Arg *arg) {
  2314. xunloadfonts();
  2315. xloadfonts(usedfont, usedfontsize + arg->i);
  2316. cresize(0, 0);
  2317. redraw(0);
  2318. }
  2319. void
  2320. xinit(void) {
  2321. XSetWindowAttributes attrs;
  2322. XGCValues gcvalues;
  2323. Cursor cursor;
  2324. Window parent;
  2325. int sw, sh;
  2326. if(!(xw.dpy = XOpenDisplay(NULL)))
  2327. die("Can't open display\n");
  2328. xw.scr = XDefaultScreen(xw.dpy);
  2329. xw.vis = XDefaultVisual(xw.dpy, xw.scr);
  2330. /* font */
  2331. if(!FcInit())
  2332. die("Could not init fontconfig.\n");
  2333. usedfont = (opt_font == NULL)? font : opt_font;
  2334. xloadfonts(usedfont, 0);
  2335. /* colors */
  2336. xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
  2337. xloadcols();
  2338. /* adjust fixed window geometry */
  2339. if(xw.isfixed) {
  2340. sw = DisplayWidth(xw.dpy, xw.scr);
  2341. sh = DisplayHeight(xw.dpy, xw.scr);
  2342. if(xw.fx < 0)
  2343. xw.fx = sw + xw.fx - xw.fw - 1;
  2344. if(xw.fy < 0)
  2345. xw.fy = sh + xw.fy - xw.fh - 1;
  2346. xw.h = xw.fh;
  2347. xw.w = xw.fw;
  2348. } else {
  2349. /* window - default size */
  2350. xw.h = 2 * borderpx + term.row * xw.ch;
  2351. xw.w = 2 * borderpx + term.col * xw.cw;
  2352. xw.fx = 0;
  2353. xw.fy = 0;
  2354. }
  2355. /* Events */
  2356. attrs.background_pixel = dc.col[defaultbg].pixel;
  2357. attrs.border_pixel = dc.col[defaultbg].pixel;
  2358. attrs.bit_gravity = NorthWestGravity;
  2359. attrs.event_mask = FocusChangeMask | KeyPressMask
  2360. | ExposureMask | VisibilityChangeMask | StructureNotifyMask
  2361. | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
  2362. attrs.colormap = xw.cmap;
  2363. parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
  2364. XRootWindow(xw.dpy, xw.scr);
  2365. xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
  2366. xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
  2367. xw.vis,
  2368. CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
  2369. | CWColormap,
  2370. &attrs);
  2371. memset(&gcvalues, 0, sizeof(gcvalues));
  2372. gcvalues.graphics_exposures = False;
  2373. dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
  2374. &gcvalues);
  2375. xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
  2376. DefaultDepth(xw.dpy, xw.scr));
  2377. XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
  2378. XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
  2379. /* Xft rendering context */
  2380. xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
  2381. /* input methods */
  2382. if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
  2383. XSetLocaleModifiers("@im=local");
  2384. if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
  2385. XSetLocaleModifiers("@im=");
  2386. if((xw.xim = XOpenIM(xw.dpy,
  2387. NULL, NULL, NULL)) == NULL) {
  2388. die("XOpenIM failed. Could not open input"
  2389. " device.\n");
  2390. }
  2391. }
  2392. }
  2393. xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
  2394. | XIMStatusNothing, XNClientWindow, xw.win,
  2395. XNFocusWindow, xw.win, NULL);
  2396. if(xw.xic == NULL)
  2397. die("XCreateIC failed. Could not obtain input method.\n");
  2398. /* white cursor, black outline */
  2399. cursor = XCreateFontCursor(xw.dpy, XC_xterm);
  2400. XDefineCursor(xw.dpy, xw.win, cursor);
  2401. XRecolorCursor(xw.dpy, cursor,
  2402. &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
  2403. &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
  2404. xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
  2405. xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
  2406. XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
  2407. xresettitle();
  2408. XMapWindow(xw.dpy, xw.win);
  2409. xhints();
  2410. XSync(xw.dpy, 0);
  2411. }
  2412. void
  2413. xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
  2414. int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
  2415. width = charlen * xw.cw, xp, i;
  2416. int frp, frcflags;
  2417. int u8fl, u8fblen, u8cblen, doesexist;
  2418. char *u8c, *u8fs;
  2419. long u8char;
  2420. Font *font = &dc.font;
  2421. FcResult fcres;
  2422. FcPattern *fcpattern, *fontpattern;
  2423. FcFontSet *fcsets[] = { NULL };
  2424. FcCharSet *fccharset;
  2425. Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
  2426. *temp, revfg, revbg;
  2427. XRenderColor colfg, colbg;
  2428. frcflags = FRC_NORMAL;
  2429. if(base.mode & ATTR_BOLD) {
  2430. if(BETWEEN(base.fg, 0, 7)) {
  2431. /* basic system colors */
  2432. fg = &dc.col[base.fg + 8];
  2433. } else if(BETWEEN(base.fg, 16, 195)) {
  2434. /* 256 colors */
  2435. fg = &dc.col[base.fg + 36];
  2436. } else if(BETWEEN(base.fg, 232, 251)) {
  2437. /* greyscale */
  2438. fg = &dc.col[base.fg + 4];
  2439. }
  2440. /*
  2441. * Those ranges will not be brightened:
  2442. * 8 - 15 – bright system colors
  2443. * 196 - 231 – highest 256 color cube
  2444. * 252 - 255 – brightest colors in greyscale
  2445. */
  2446. font = &dc.bfont;
  2447. frcflags = FRC_BOLD;
  2448. }
  2449. if(base.mode & ATTR_ITALIC) {
  2450. font = &dc.ifont;
  2451. frcflags = FRC_ITALIC;
  2452. }
  2453. if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
  2454. font = &dc.ibfont;
  2455. frcflags = FRC_ITALICBOLD;
  2456. }
  2457. if(IS_SET(MODE_REVERSE)) {
  2458. if(fg == &dc.col[defaultfg]) {
  2459. fg = &dc.col[defaultbg];
  2460. } else {
  2461. colfg.red = ~fg->color.red;
  2462. colfg.green = ~fg->color.green;
  2463. colfg.blue = ~fg->color.blue;
  2464. colfg.alpha = fg->color.alpha;
  2465. XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
  2466. fg = &revfg;
  2467. }
  2468. if(bg == &dc.col[defaultbg]) {
  2469. bg = &dc.col[defaultfg];
  2470. } else {
  2471. colbg.red = ~bg->color.red;
  2472. colbg.green = ~bg->color.green;
  2473. colbg.blue = ~bg->color.blue;
  2474. colbg.alpha = bg->color.alpha;
  2475. XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
  2476. bg = &revbg;
  2477. }
  2478. }
  2479. if(base.mode & ATTR_REVERSE) {
  2480. temp = fg;
  2481. fg = bg;
  2482. bg = temp;
  2483. }
  2484. /* Intelligent cleaning up of the borders. */
  2485. if(x == 0) {
  2486. xclear(0, (y == 0)? 0 : winy, borderpx,
  2487. winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
  2488. }
  2489. if(x + charlen >= term.col) {
  2490. xclear(winx + width, (y == 0)? 0 : winy, xw.w,
  2491. ((y >= term.row-1)? xw.h : (winy + xw.ch)));
  2492. }
  2493. if(y == 0)
  2494. xclear(winx, 0, winx + width, borderpx);
  2495. if(y == term.row-1)
  2496. xclear(winx, winy + xw.ch, winx + width, xw.h);
  2497. /* Clean up the region we want to draw to. */
  2498. XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
  2499. fcsets[0] = font->set;
  2500. for(xp = winx; bytelen > 0;) {
  2501. /*
  2502. * Search for the range in the to be printed string of glyphs
  2503. * that are in the main font. Then print that range. If
  2504. * some glyph is found that is not in the font, do the
  2505. * fallback dance.
  2506. */
  2507. u8fs = s;
  2508. u8fblen = 0;
  2509. u8fl = 0;
  2510. for(;;) {
  2511. u8c = s;
  2512. u8cblen = utf8decode(s, &u8char);
  2513. s += u8cblen;
  2514. bytelen -= u8cblen;
  2515. doesexist = XftCharIndex(xw.dpy, font->match, u8char);
  2516. if(!doesexist || bytelen <= 0) {
  2517. if(bytelen <= 0) {
  2518. if(doesexist) {
  2519. u8fl++;
  2520. u8fblen += u8cblen;
  2521. }
  2522. }
  2523. if(u8fl > 0) {
  2524. XftDrawStringUtf8(xw.draw, fg,
  2525. font->match, xp,
  2526. winy + font->ascent,
  2527. (FcChar8 *)u8fs,
  2528. u8fblen);
  2529. xp += font->width * u8fl;
  2530. }
  2531. break;
  2532. }
  2533. u8fl++;
  2534. u8fblen += u8cblen;
  2535. }
  2536. if(doesexist)
  2537. break;
  2538. frp = frccur;
  2539. /* Search the font cache. */
  2540. for(i = 0; i < frclen; i++, frp--) {
  2541. if(frp <= 0)
  2542. frp = LEN(frc) - 1;
  2543. if(frc[frp].c == u8char
  2544. && frc[frp].flags == frcflags) {
  2545. break;
  2546. }
  2547. }
  2548. /* Nothing was found. */
  2549. if(i >= frclen) {
  2550. /*
  2551. * Nothing was found in the cache. Now use
  2552. * some dozen of Fontconfig calls to get the
  2553. * font for one single character.
  2554. */
  2555. fcpattern = FcPatternDuplicate(font->pattern);
  2556. fccharset = FcCharSetCreate();
  2557. FcCharSetAddChar(fccharset, u8char);
  2558. FcPatternAddCharSet(fcpattern, FC_CHARSET,
  2559. fccharset);
  2560. FcPatternAddBool(fcpattern, FC_SCALABLE,
  2561. FcTrue);
  2562. FcConfigSubstitute(0, fcpattern,
  2563. FcMatchPattern);
  2564. FcDefaultSubstitute(fcpattern);
  2565. fontpattern = FcFontSetMatch(0, fcsets,
  2566. FcTrue, fcpattern, &fcres);
  2567. /*
  2568. * Overwrite or create the new cache entry
  2569. * entry.
  2570. */
  2571. frccur++;
  2572. frclen++;
  2573. if(frccur >= LEN(frc))
  2574. frccur = 0;
  2575. if(frclen > LEN(frc)) {
  2576. frclen = LEN(frc);
  2577. XftFontClose(xw.dpy, frc[frccur].font);
  2578. }
  2579. frc[frccur].font = XftFontOpenPattern(xw.dpy,
  2580. fontpattern);
  2581. frc[frccur].c = u8char;
  2582. frc[frccur].flags = frcflags;
  2583. FcPatternDestroy(fcpattern);
  2584. FcCharSetDestroy(fccharset);
  2585. frp = frccur;
  2586. }
  2587. XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
  2588. xp, winy + frc[frp].font->ascent,
  2589. (FcChar8 *)u8c, u8cblen);
  2590. xp += font->width;
  2591. }
  2592. /*
  2593. XftDrawStringUtf8(xw.draw, fg, font->set, winx,
  2594. winy + font->ascent, (FcChar8 *)s, bytelen);
  2595. */
  2596. if(base.mode & ATTR_UNDERLINE) {
  2597. XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
  2598. width, 1);
  2599. }
  2600. }
  2601. void
  2602. xdrawcursor(void) {
  2603. static int oldx = 0, oldy = 0;
  2604. int sl;
  2605. Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
  2606. LIMIT(oldx, 0, term.col-1);
  2607. LIMIT(oldy, 0, term.row-1);
  2608. if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
  2609. memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
  2610. /* remove the old cursor */
  2611. if(term.line[oldy][oldx].state & GLYPH_SET) {
  2612. sl = utf8size(term.line[oldy][oldx].c);
  2613. xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
  2614. oldy, 1, sl);
  2615. } else {
  2616. xtermclear(oldx, oldy, oldx, oldy);
  2617. }
  2618. /* draw the new one */
  2619. if(!(IS_SET(MODE_HIDE))) {
  2620. if(!(xw.state & WIN_FOCUSED))
  2621. g.bg = defaultucs;
  2622. if(IS_SET(MODE_REVERSE))
  2623. g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
  2624. sl = utf8size(g.c);
  2625. xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
  2626. oldx = term.c.x, oldy = term.c.y;
  2627. }
  2628. }
  2629. void
  2630. xsettitle(char *p) {
  2631. XTextProperty prop;
  2632. Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
  2633. &prop);
  2634. XSetWMName(xw.dpy, xw.win, &prop);
  2635. }
  2636. void
  2637. xresettitle(void) {
  2638. xsettitle(opt_title ? opt_title : "st");
  2639. }
  2640. void
  2641. redraw(int timeout) {
  2642. struct timespec tv = {0, timeout * 1000};
  2643. tfulldirt();
  2644. draw();
  2645. if(timeout > 0) {
  2646. nanosleep(&tv, NULL);
  2647. XSync(xw.dpy, False); /* necessary for a good tput flash */
  2648. }
  2649. }
  2650. void
  2651. draw(void) {
  2652. drawregion(0, 0, term.col, term.row);
  2653. XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
  2654. xw.h, 0, 0);
  2655. XSetForeground(xw.dpy, dc.gc,
  2656. dc.col[IS_SET(MODE_REVERSE)?
  2657. defaultfg : defaultbg].pixel);
  2658. }
  2659. void
  2660. drawregion(int x1, int y1, int x2, int y2) {
  2661. int ic, ib, x, y, ox, sl;
  2662. Glyph base, new;
  2663. char buf[DRAW_BUF_SIZ];
  2664. bool ena_sel = sel.bx != -1;
  2665. if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
  2666. ena_sel = 0;
  2667. if(!(xw.state & WIN_VISIBLE))
  2668. return;
  2669. for(y = y1; y < y2; y++) {
  2670. if(!term.dirty[y])
  2671. continue;
  2672. xtermclear(0, y, term.col, y);
  2673. term.dirty[y] = 0;
  2674. base = term.line[y][0];
  2675. ic = ib = ox = 0;
  2676. for(x = x1; x < x2; x++) {
  2677. new = term.line[y][x];
  2678. if(ena_sel && *(new.c) && selected(x, y))
  2679. new.mode ^= ATTR_REVERSE;
  2680. if(ib > 0 && (!(new.state & GLYPH_SET)
  2681. || ATTRCMP(base, new)
  2682. || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
  2683. xdraws(buf, base, ox, y, ic, ib);
  2684. ic = ib = 0;
  2685. }
  2686. if(new.state & GLYPH_SET) {
  2687. if(ib == 0) {
  2688. ox = x;
  2689. base = new;
  2690. }
  2691. sl = utf8size(new.c);
  2692. memcpy(buf+ib, new.c, sl);
  2693. ib += sl;
  2694. ++ic;
  2695. }
  2696. }
  2697. if(ib > 0)
  2698. xdraws(buf, base, ox, y, ic, ib);
  2699. }
  2700. xdrawcursor();
  2701. }
  2702. void
  2703. expose(XEvent *ev) {
  2704. XExposeEvent *e = &ev->xexpose;
  2705. if(xw.state & WIN_REDRAW) {
  2706. if(!e->count)
  2707. xw.state &= ~WIN_REDRAW;
  2708. }
  2709. redraw(0);
  2710. }
  2711. void
  2712. visibility(XEvent *ev) {
  2713. XVisibilityEvent *e = &ev->xvisibility;
  2714. if(e->state == VisibilityFullyObscured) {
  2715. xw.state &= ~WIN_VISIBLE;
  2716. } else if(!(xw.state & WIN_VISIBLE)) {
  2717. /* need a full redraw for next Expose, not just a buf copy */
  2718. xw.state |= WIN_VISIBLE | WIN_REDRAW;
  2719. }
  2720. }
  2721. void
  2722. unmap(XEvent *ev) {
  2723. xw.state &= ~WIN_VISIBLE;
  2724. }
  2725. void
  2726. xseturgency(int add) {
  2727. XWMHints *h = XGetWMHints(xw.dpy, xw.win);
  2728. h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
  2729. XSetWMHints(xw.dpy, xw.win, h);
  2730. XFree(h);
  2731. }
  2732. void
  2733. focus(XEvent *ev) {
  2734. XFocusChangeEvent *e = &ev->xfocus;
  2735. if(e->mode == NotifyGrab)
  2736. return;
  2737. if(ev->type == FocusIn) {
  2738. XSetICFocus(xw.xic);
  2739. xw.state |= WIN_FOCUSED;
  2740. xseturgency(0);
  2741. } else {
  2742. XUnsetICFocus(xw.xic);
  2743. xw.state &= ~WIN_FOCUSED;
  2744. }
  2745. }
  2746. inline bool
  2747. match(uint mask, uint state) {
  2748. state &= ~(ignoremod);
  2749. if(mask == XK_NO_MOD && state)
  2750. return false;
  2751. if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
  2752. return false;
  2753. if((state & mask) != state)
  2754. return false;
  2755. return true;
  2756. }
  2757. void
  2758. numlock(const Arg *dummy) {
  2759. term.numlock ^= 1;
  2760. }
  2761. char*
  2762. kmap(KeySym k, uint state) {
  2763. uint mask;
  2764. Key *kp;
  2765. int i;
  2766. /* Check for mapped keys out of X11 function keys. */
  2767. for(i = 0; i < LEN(mappedkeys); i++) {
  2768. if(mappedkeys[i] == k)
  2769. break;
  2770. }
  2771. if(i == LEN(mappedkeys)) {
  2772. if((k & 0xFFFF) < 0xFD00)
  2773. return NULL;
  2774. }
  2775. for(kp = key; kp < key + LEN(key); kp++) {
  2776. mask = kp->mask;
  2777. if(kp->k != k)
  2778. continue;
  2779. if(!match(mask, state))
  2780. continue;
  2781. if(kp->appkey > 0) {
  2782. if(!IS_SET(MODE_APPKEYPAD))
  2783. continue;
  2784. if(term.numlock && kp->appkey == 2)
  2785. continue;
  2786. } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
  2787. continue;
  2788. }
  2789. if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
  2790. (kp->appcursor > 0
  2791. && !IS_SET(MODE_APPCURSOR))) {
  2792. continue;
  2793. }
  2794. if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
  2795. (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
  2796. continue;
  2797. }
  2798. return kp->s;
  2799. }
  2800. return NULL;
  2801. }
  2802. void
  2803. kpress(XEvent *ev) {
  2804. XKeyEvent *e = &ev->xkey;
  2805. KeySym ksym;
  2806. char xstr[31], buf[32], *customkey, *cp = buf;
  2807. int len;
  2808. Status status;
  2809. Shortcut *bp;
  2810. if(IS_SET(MODE_KBDLOCK))
  2811. return;
  2812. len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
  2813. e->state &= ~Mod2Mask;
  2814. /* 1. shortcuts */
  2815. for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
  2816. if(ksym == bp->keysym && match(bp->mod, e->state)) {
  2817. bp->func(&(bp->arg));
  2818. return;
  2819. }
  2820. }
  2821. /* 2. custom keys from config.h */
  2822. if((customkey = kmap(ksym, e->state))) {
  2823. len = strlen(customkey);
  2824. memcpy(buf, customkey, len);
  2825. /* 2. hardcoded (overrides X lookup) */
  2826. } else {
  2827. if(len == 0)
  2828. return;
  2829. if(len == 1 && e->state & Mod1Mask)
  2830. *cp++ = '\033';
  2831. memcpy(cp, xstr, len);
  2832. len = cp - buf + len;
  2833. }
  2834. ttywrite(buf, len);
  2835. if(IS_SET(MODE_ECHO))
  2836. techo(buf, len);
  2837. }
  2838. void
  2839. cmessage(XEvent *e) {
  2840. /*
  2841. * See xembed specs
  2842. * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
  2843. */
  2844. if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
  2845. if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
  2846. xw.state |= WIN_FOCUSED;
  2847. xseturgency(0);
  2848. } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
  2849. xw.state &= ~WIN_FOCUSED;
  2850. }
  2851. } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
  2852. /* Send SIGHUP to shell */
  2853. kill(pid, SIGHUP);
  2854. exit(EXIT_SUCCESS);
  2855. }
  2856. }
  2857. void
  2858. cresize(int width, int height) {
  2859. int col, row;
  2860. if(width != 0)
  2861. xw.w = width;
  2862. if(height != 0)
  2863. xw.h = height;
  2864. col = (xw.w - 2 * borderpx) / xw.cw;
  2865. row = (xw.h - 2 * borderpx) / xw.ch;
  2866. tresize(col, row);
  2867. xresize(col, row);
  2868. ttyresize();
  2869. }
  2870. void
  2871. resize(XEvent *e) {
  2872. if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
  2873. return;
  2874. cresize(e->xconfigure.width, e->xconfigure.height);
  2875. }
  2876. void
  2877. run(void) {
  2878. XEvent ev;
  2879. fd_set rfd;
  2880. int xfd = XConnectionNumber(xw.dpy), xev;
  2881. struct timeval drawtimeout, *tv = NULL, now, last;
  2882. gettimeofday(&last, NULL);
  2883. for(xev = actionfps;;) {
  2884. FD_ZERO(&rfd);
  2885. FD_SET(cmdfd, &rfd);
  2886. FD_SET(xfd, &rfd);
  2887. if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
  2888. if(errno == EINTR)
  2889. continue;
  2890. die("select failed: %s\n", SERRNO);
  2891. }
  2892. gettimeofday(&now, NULL);
  2893. drawtimeout.tv_sec = 0;
  2894. drawtimeout.tv_usec = (1000/xfps) * 1000;
  2895. tv = &drawtimeout;
  2896. if(FD_ISSET(cmdfd, &rfd))
  2897. ttyread();
  2898. if(FD_ISSET(xfd, &rfd))
  2899. xev = actionfps;
  2900. if(TIMEDIFF(now, last) > \
  2901. (xev ? (1000/xfps) : (1000/actionfps))) {
  2902. while(XPending(xw.dpy)) {
  2903. XNextEvent(xw.dpy, &ev);
  2904. if(XFilterEvent(&ev, None))
  2905. continue;
  2906. if(handler[ev.type])
  2907. (handler[ev.type])(&ev);
  2908. }
  2909. draw();
  2910. XFlush(xw.dpy);
  2911. last = now;
  2912. if(xev && !FD_ISSET(xfd, &rfd))
  2913. xev--;
  2914. if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
  2915. tv = NULL;
  2916. }
  2917. }
  2918. }
  2919. int
  2920. main(int argc, char *argv[]) {
  2921. int i, bitm, xr, yr;
  2922. uint wr, hr;
  2923. xw.fw = xw.fh = xw.fx = xw.fy = 0;
  2924. xw.isfixed = False;
  2925. for(i = 1; i < argc; i++) {
  2926. switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
  2927. case 'c':
  2928. if(++i < argc)
  2929. opt_class = argv[i];
  2930. break;
  2931. case 'e':
  2932. /* eat all remaining arguments */
  2933. if(++i < argc)
  2934. opt_cmd = &argv[i];
  2935. goto run;
  2936. case 'f':
  2937. if(++i < argc)
  2938. opt_font = argv[i];
  2939. break;
  2940. case 'g':
  2941. if(++i >= argc)
  2942. break;
  2943. bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
  2944. if(bitm & XValue)
  2945. xw.fx = xr;
  2946. if(bitm & YValue)
  2947. xw.fy = yr;
  2948. if(bitm & WidthValue)
  2949. xw.fw = (int)wr;
  2950. if(bitm & HeightValue)
  2951. xw.fh = (int)hr;
  2952. if(bitm & XNegative && xw.fx == 0)
  2953. xw.fx = -1;
  2954. if(bitm & XNegative && xw.fy == 0)
  2955. xw.fy = -1;
  2956. if(xw.fh != 0 && xw.fw != 0)
  2957. xw.isfixed = True;
  2958. break;
  2959. case 'o':
  2960. if(++i < argc)
  2961. opt_io = argv[i];
  2962. break;
  2963. case 't':
  2964. if(++i < argc)
  2965. opt_title = argv[i];
  2966. break;
  2967. case 'v':
  2968. default:
  2969. die(USAGE);
  2970. case 'w':
  2971. if(++i < argc)
  2972. opt_embed = argv[i];
  2973. break;
  2974. }
  2975. }
  2976. run:
  2977. setlocale(LC_CTYPE, "");
  2978. XSetLocaleModifiers("");
  2979. tnew(80, 24);
  2980. xinit();
  2981. ttynew();
  2982. selinit();
  2983. run();
  2984. return 0;
  2985. }