st.c 71 KB

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  1. /* See LICENSE for licence details. */
  2. #define _XOPEN_SOURCE 600
  3. #include <ctype.h>
  4. #include <errno.h>
  5. #include <fcntl.h>
  6. #include <limits.h>
  7. #include <locale.h>
  8. #include <pwd.h>
  9. #include <stdarg.h>
  10. #include <stdbool.h>
  11. #include <stdio.h>
  12. #include <stdlib.h>
  13. #include <string.h>
  14. #include <signal.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 <X11/Xatom.h>
  24. #include <X11/Xlib.h>
  25. #include <X11/Xutil.h>
  26. #include <X11/cursorfont.h>
  27. #include <X11/keysym.h>
  28. #include <X11/extensions/Xdbe.h>
  29. #include <X11/Xft/Xft.h>
  30. #include <fontconfig/fontconfig.h>
  31. #define Glyph Glyph_
  32. #define Font Font_
  33. #define Draw XftDraw *
  34. #define Colour XftColor
  35. #define Colourmap Colormap
  36. #if defined(__linux)
  37. #include <pty.h>
  38. #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  39. #include <util.h>
  40. #elif defined(__FreeBSD__) || defined(__DragonFly__)
  41. #include <libutil.h>
  42. #endif
  43. #define USAGE \
  44. "st " VERSION " (c) 2010-2013 st engineers\n" \
  45. "usage: st [-v] [-c class] [-f font] [-g geometry] [-o file]" \
  46. " [-t title] [-w windowid] [-e command ...]\n"
  47. /* XEMBED messages */
  48. #define XEMBED_FOCUS_IN 4
  49. #define XEMBED_FOCUS_OUT 5
  50. /* Arbitrary sizes */
  51. #define UTF_SIZ 4
  52. #define ESC_BUF_SIZ (128*UTF_SIZ)
  53. #define ESC_ARG_SIZ 16
  54. #define STR_BUF_SIZ ESC_BUF_SIZ
  55. #define STR_ARG_SIZ ESC_ARG_SIZ
  56. #define DRAW_BUF_SIZ 20*1024
  57. #define XK_ANY_MOD UINT_MAX
  58. #define XK_NO_MOD 0
  59. #define XK_SWITCH_MOD (1<<13)
  60. #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
  61. /* macros */
  62. #define SERRNO strerror(errno)
  63. #define MIN(a, b) ((a) < (b) ? (a) : (b))
  64. #define MAX(a, b) ((a) < (b) ? (b) : (a))
  65. #define LEN(a) (sizeof(a) / sizeof(a[0]))
  66. #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
  67. #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
  68. #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  69. #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  70. #define IS_SET(flag) ((term.mode & (flag)) != 0)
  71. #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
  72. #define VT102ID "\033[?6c"
  73. enum glyph_attribute {
  74. ATTR_NULL = 0,
  75. ATTR_REVERSE = 1,
  76. ATTR_UNDERLINE = 2,
  77. ATTR_BOLD = 4,
  78. ATTR_GFX = 8,
  79. ATTR_ITALIC = 16,
  80. ATTR_BLINK = 32,
  81. };
  82. enum cursor_movement {
  83. CURSOR_SAVE,
  84. CURSOR_LOAD
  85. };
  86. enum cursor_state {
  87. CURSOR_DEFAULT = 0,
  88. CURSOR_WRAPNEXT = 1,
  89. CURSOR_ORIGIN = 2
  90. };
  91. enum glyph_state {
  92. GLYPH_SET = 1,
  93. GLYPH_DIRTY = 2
  94. };
  95. enum term_mode {
  96. MODE_WRAP = 1,
  97. MODE_INSERT = 2,
  98. MODE_APPKEYPAD = 4,
  99. MODE_ALTSCREEN = 8,
  100. MODE_CRLF = 16,
  101. MODE_MOUSEBTN = 32,
  102. MODE_MOUSEMOTION = 64,
  103. MODE_MOUSE = 32|64,
  104. MODE_REVERSE = 128,
  105. MODE_KBDLOCK = 256,
  106. MODE_HIDE = 512,
  107. MODE_ECHO = 1024,
  108. MODE_APPCURSOR = 2048,
  109. MODE_MOUSESGR = 4096,
  110. };
  111. enum escape_state {
  112. ESC_START = 1,
  113. ESC_CSI = 2,
  114. ESC_STR = 4, /* DSC, OSC, PM, APC */
  115. ESC_ALTCHARSET = 8,
  116. ESC_STR_END = 16, /* a final string was encountered */
  117. ESC_TEST = 32, /* Enter in test mode */
  118. };
  119. enum window_state {
  120. WIN_VISIBLE = 1,
  121. WIN_REDRAW = 2,
  122. WIN_FOCUSED = 4
  123. };
  124. /* bit macro */
  125. #undef B0
  126. enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
  127. typedef unsigned char uchar;
  128. typedef unsigned int uint;
  129. typedef unsigned long ulong;
  130. typedef unsigned short ushort;
  131. typedef struct {
  132. char c[UTF_SIZ]; /* character code */
  133. uchar mode; /* attribute flags */
  134. ushort fg; /* foreground */
  135. ushort bg; /* background */
  136. uchar state; /* state flags */
  137. } Glyph;
  138. typedef Glyph *Line;
  139. typedef struct {
  140. Glyph attr; /* current char attributes */
  141. int x;
  142. int y;
  143. char state;
  144. } TCursor;
  145. /* CSI Escape sequence structs */
  146. /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  147. typedef struct {
  148. char buf[ESC_BUF_SIZ]; /* raw string */
  149. int len; /* raw string length */
  150. char priv;
  151. int arg[ESC_ARG_SIZ];
  152. int narg; /* nb of args */
  153. char mode;
  154. } CSIEscape;
  155. /* STR Escape sequence structs */
  156. /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
  157. typedef struct {
  158. char type; /* ESC type ... */
  159. char buf[STR_BUF_SIZ]; /* raw string */
  160. int len; /* raw string length */
  161. char *args[STR_ARG_SIZ];
  162. int narg; /* nb of args */
  163. } STREscape;
  164. /* Internal representation of the screen */
  165. typedef struct {
  166. int row; /* nb row */
  167. int col; /* nb col */
  168. Line *line; /* screen */
  169. Line *alt; /* alternate screen */
  170. bool *dirty; /* dirtyness of lines */
  171. TCursor c; /* cursor */
  172. int top; /* top scroll limit */
  173. int bot; /* bottom scroll limit */
  174. int mode; /* terminal mode flags */
  175. int esc; /* escape state flags */
  176. bool numlock; /* lock numbers in keyboard */
  177. bool *tabs;
  178. } Term;
  179. /* Purely graphic info */
  180. typedef struct {
  181. Display *dpy;
  182. Colourmap cmap;
  183. Window win;
  184. Drawable buf;
  185. Atom xembed, wmdeletewin;
  186. XIM xim;
  187. XIC xic;
  188. Draw draw;
  189. Visual *vis;
  190. int scr;
  191. bool isfixed; /* is fixed geometry? */
  192. int fx, fy, fw, fh; /* fixed geometry */
  193. int tw, th; /* tty width and height */
  194. int w, h; /* window width and height */
  195. int ch; /* char height */
  196. int cw; /* char width */
  197. char state; /* focus, redraw, visible */
  198. } XWindow;
  199. typedef struct {
  200. KeySym k;
  201. uint mask;
  202. char s[ESC_BUF_SIZ];
  203. /* three valued logic variables: 0 indifferent, 1 on, -1 off */
  204. signed char appkey; /* application keypad */
  205. signed char appcursor; /* application cursor */
  206. signed char crlf; /* crlf mode */
  207. } Key;
  208. /* TODO: use better name for vars... */
  209. typedef struct {
  210. int mode;
  211. int bx, by;
  212. int ex, ey;
  213. struct {
  214. int x, y;
  215. } b, e;
  216. char *clip;
  217. Atom xtarget;
  218. bool alt;
  219. struct timeval tclick1;
  220. struct timeval tclick2;
  221. } Selection;
  222. typedef union {
  223. int i;
  224. unsigned int ui;
  225. float f;
  226. const void *v;
  227. } Arg;
  228. typedef struct {
  229. unsigned int mod;
  230. KeySym keysym;
  231. void (*func)(const Arg *);
  232. const Arg arg;
  233. } Shortcut;
  234. /* function definitions used in config.h */
  235. static void xzoom(const Arg *);
  236. static void selpaste(const Arg *);
  237. static void numlock(const Arg *);
  238. /* Config.h for applying patches and the configuration. */
  239. #include "config.h"
  240. /* Font structure */
  241. typedef struct {
  242. int height;
  243. int width;
  244. int ascent;
  245. int descent;
  246. short lbearing;
  247. short rbearing;
  248. XftFont *match;
  249. FcFontSet *set;
  250. FcPattern *pattern;
  251. } Font;
  252. /* Drawing Context */
  253. typedef struct {
  254. Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
  255. Font font, bfont, ifont, ibfont;
  256. GC gc;
  257. } DC;
  258. static void die(const char *, ...);
  259. static void draw(void);
  260. static void redraw(int);
  261. static void drawregion(int, int, int, int);
  262. static void execsh(void);
  263. static void sigchld(int);
  264. static void run(void);
  265. static void csidump(void);
  266. static void csihandle(void);
  267. static void csiparse(void);
  268. static void csireset(void);
  269. static void strdump(void);
  270. static void strhandle(void);
  271. static void strparse(void);
  272. static void strreset(void);
  273. static void tclearregion(int, int, int, int, int);
  274. static void tcursor(int);
  275. static void tdeletechar(int);
  276. static void tdeleteline(int);
  277. static void tinsertblank(int);
  278. static void tinsertblankline(int);
  279. static void tmoveto(int, int);
  280. static void tmoveato(int x, int y);
  281. static void tnew(int, int);
  282. static void tnewline(int);
  283. static void tputtab(bool);
  284. static void tputc(char *, int);
  285. static void treset(void);
  286. static int tresize(int, int);
  287. static void tscrollup(int, int);
  288. static void tscrolldown(int, int);
  289. static void tsetattr(int*, int);
  290. static void tsetchar(char *, Glyph *, int, int);
  291. static void tsetscroll(int, int);
  292. static void tswapscreen(void);
  293. static void tsetdirt(int, int);
  294. static void tsetmode(bool, bool, int *, int);
  295. static void tfulldirt(void);
  296. static void techo(char *, int);
  297. static inline bool match(uint, uint);
  298. static void ttynew(void);
  299. static void ttyread(void);
  300. static void ttyresize(void);
  301. static void ttywrite(const char *, size_t);
  302. static void xdraws(char *, Glyph, int, int, int, int);
  303. static void xhints(void);
  304. static void xclear(int, int, int, int);
  305. static void xdrawcursor(void);
  306. static void xinit(void);
  307. static void xloadcols(void);
  308. static int xloadfont(Font *, FcPattern *);
  309. static void xloadfonts(char *, int);
  310. static void xresettitle(void);
  311. static void xseturgency(int);
  312. static void xsetsel(char*);
  313. static void xtermclear(int, int, int, int);
  314. static void xunloadfonts(void);
  315. static void xresize(int, int);
  316. static void expose(XEvent *);
  317. static void visibility(XEvent *);
  318. static void unmap(XEvent *);
  319. static char *kmap(KeySym, uint);
  320. static void kpress(XEvent *);
  321. static void cmessage(XEvent *);
  322. static void cresize(int, int);
  323. static void resize(XEvent *);
  324. static void focus(XEvent *);
  325. static void brelease(XEvent *);
  326. static void bpress(XEvent *);
  327. static void bmotion(XEvent *);
  328. static void selnotify(XEvent *);
  329. static void selclear(XEvent *);
  330. static void selrequest(XEvent *);
  331. static void selinit(void);
  332. static inline bool selected(int, int);
  333. static void selcopy(void);
  334. static void selscroll(int, int);
  335. static int utf8decode(char *, long *);
  336. static int utf8encode(long *, char *);
  337. static int utf8size(char *);
  338. static int isfullutf8(char *, int);
  339. static ssize_t xwrite(int, char *, size_t);
  340. static void *xmalloc(size_t);
  341. static void *xrealloc(void *, size_t);
  342. static void *xcalloc(size_t, size_t);
  343. static void (*handler[LASTEvent])(XEvent *) = {
  344. [KeyPress] = kpress,
  345. [ClientMessage] = cmessage,
  346. [ConfigureNotify] = resize,
  347. [VisibilityNotify] = visibility,
  348. [UnmapNotify] = unmap,
  349. [Expose] = expose,
  350. [FocusIn] = focus,
  351. [FocusOut] = focus,
  352. [MotionNotify] = bmotion,
  353. [ButtonPress] = bpress,
  354. [ButtonRelease] = brelease,
  355. [SelectionClear] = selclear,
  356. [SelectionNotify] = selnotify,
  357. [SelectionRequest] = selrequest,
  358. };
  359. /* Globals */
  360. static DC dc;
  361. static XWindow xw;
  362. static Term term;
  363. static CSIEscape csiescseq;
  364. static STREscape strescseq;
  365. static int cmdfd;
  366. static pid_t pid;
  367. static Selection sel;
  368. static int iofd = -1;
  369. static char **opt_cmd = NULL;
  370. static char *opt_io = NULL;
  371. static char *opt_title = NULL;
  372. static char *opt_embed = NULL;
  373. static char *opt_class = NULL;
  374. static char *opt_font = NULL;
  375. bool usedbe = False;
  376. static char *usedfont = NULL;
  377. static int usedfontsize = 0;
  378. /* Font Ring Cache */
  379. enum {
  380. FRC_NORMAL,
  381. FRC_ITALIC,
  382. FRC_BOLD,
  383. FRC_ITALICBOLD
  384. };
  385. typedef struct {
  386. XftFont *font;
  387. long c;
  388. int flags;
  389. } Fontcache;
  390. /*
  391. * Fontcache is a ring buffer, with frccur as current position and frclen as
  392. * the current length of used elements.
  393. */
  394. static Fontcache frc[1024];
  395. static int frccur = -1, frclen = 0;
  396. ssize_t
  397. xwrite(int fd, char *s, size_t len) {
  398. size_t aux = len;
  399. while(len > 0) {
  400. ssize_t r = write(fd, s, len);
  401. if(r < 0)
  402. return r;
  403. len -= r;
  404. s += r;
  405. }
  406. return aux;
  407. }
  408. void *
  409. xmalloc(size_t len) {
  410. void *p = malloc(len);
  411. if(!p)
  412. die("Out of memory\n");
  413. return p;
  414. }
  415. void *
  416. xrealloc(void *p, size_t len) {
  417. if((p = realloc(p, len)) == NULL)
  418. die("Out of memory\n");
  419. return p;
  420. }
  421. void *
  422. xcalloc(size_t nmemb, size_t size) {
  423. void *p = calloc(nmemb, size);
  424. if(!p)
  425. die("Out of memory\n");
  426. return p;
  427. }
  428. int
  429. utf8decode(char *s, long *u) {
  430. uchar c;
  431. int i, n, rtn;
  432. rtn = 1;
  433. c = *s;
  434. if(~c & B7) { /* 0xxxxxxx */
  435. *u = c;
  436. return rtn;
  437. } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
  438. *u = c&(B4|B3|B2|B1|B0);
  439. n = 1;
  440. } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
  441. *u = c&(B3|B2|B1|B0);
  442. n = 2;
  443. } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
  444. *u = c & (B2|B1|B0);
  445. n = 3;
  446. } else {
  447. goto invalid;
  448. }
  449. for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
  450. c = *s;
  451. if((c & (B7|B6)) != B7) /* 10xxxxxx */
  452. goto invalid;
  453. *u <<= 6;
  454. *u |= c & (B5|B4|B3|B2|B1|B0);
  455. }
  456. if((n == 1 && *u < 0x80) ||
  457. (n == 2 && *u < 0x800) ||
  458. (n == 3 && *u < 0x10000) ||
  459. (*u >= 0xD800 && *u <= 0xDFFF)) {
  460. goto invalid;
  461. }
  462. return rtn;
  463. invalid:
  464. *u = 0xFFFD;
  465. return rtn;
  466. }
  467. int
  468. utf8encode(long *u, char *s) {
  469. uchar *sp;
  470. ulong uc;
  471. int i, n;
  472. sp = (uchar *)s;
  473. uc = *u;
  474. if(uc < 0x80) {
  475. *sp = uc; /* 0xxxxxxx */
  476. return 1;
  477. } else if(*u < 0x800) {
  478. *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
  479. n = 1;
  480. } else if(uc < 0x10000) {
  481. *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
  482. n = 2;
  483. } else if(uc <= 0x10FFFF) {
  484. *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
  485. n = 3;
  486. } else {
  487. goto invalid;
  488. }
  489. for(i=n,++sp; i>0; --i,++sp)
  490. *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
  491. return n+1;
  492. invalid:
  493. /* U+FFFD */
  494. *s++ = '\xEF';
  495. *s++ = '\xBF';
  496. *s = '\xBD';
  497. return 3;
  498. }
  499. /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
  500. UTF-8 otherwise return 0 */
  501. int
  502. isfullutf8(char *s, int b) {
  503. uchar *c1, *c2, *c3;
  504. c1 = (uchar *)s;
  505. c2 = (uchar *)++s;
  506. c3 = (uchar *)++s;
  507. if(b < 1) {
  508. return 0;
  509. } else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1) {
  510. return 0;
  511. } else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
  512. ((b == 1) ||
  513. ((b == 2) && (*c2&(B7|B6)) == B7))) {
  514. return 0;
  515. } else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
  516. ((b == 1) ||
  517. ((b == 2) && (*c2&(B7|B6)) == B7) ||
  518. ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7))) {
  519. return 0;
  520. } else {
  521. return 1;
  522. }
  523. }
  524. int
  525. utf8size(char *s) {
  526. uchar c = *s;
  527. if(~c&B7) {
  528. return 1;
  529. } else if((c&(B7|B6|B5)) == (B7|B6)) {
  530. return 2;
  531. } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) {
  532. return 3;
  533. } else {
  534. return 4;
  535. }
  536. }
  537. void
  538. selinit(void) {
  539. memset(&sel.tclick1, 0, sizeof(sel.tclick1));
  540. memset(&sel.tclick2, 0, sizeof(sel.tclick2));
  541. sel.mode = 0;
  542. sel.bx = -1;
  543. sel.clip = NULL;
  544. sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
  545. if(sel.xtarget == None)
  546. sel.xtarget = XA_STRING;
  547. }
  548. static int
  549. x2col(int x) {
  550. x -= borderpx;
  551. x /= xw.cw;
  552. return LIMIT(x, 0, term.col-1);
  553. }
  554. static int
  555. y2row(int y) {
  556. y -= borderpx;
  557. y /= xw.ch;
  558. return LIMIT(y, 0, term.row-1);
  559. }
  560. static inline bool
  561. selected(int x, int y) {
  562. int bx, ex;
  563. if(sel.ey == y && sel.by == y) {
  564. bx = MIN(sel.bx, sel.ex);
  565. ex = MAX(sel.bx, sel.ex);
  566. return BETWEEN(x, bx, ex);
  567. }
  568. return ((sel.b.y < y && y < sel.e.y)
  569. || (y == sel.e.y && x <= sel.e.x))
  570. || (y == sel.b.y && x >= sel.b.x
  571. && (x <= sel.e.x || sel.b.y != sel.e.y));
  572. }
  573. void
  574. getbuttoninfo(XEvent *e) {
  575. sel.alt = IS_SET(MODE_ALTSCREEN);
  576. sel.ex = x2col(e->xbutton.x);
  577. sel.ey = y2row(e->xbutton.y);
  578. sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
  579. sel.b.y = MIN(sel.by, sel.ey);
  580. sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
  581. sel.e.y = MAX(sel.by, sel.ey);
  582. }
  583. void
  584. mousereport(XEvent *e) {
  585. int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
  586. button = e->xbutton.button, state = e->xbutton.state,
  587. len;
  588. char buf[40];
  589. static int ob, ox, oy;
  590. /* from urxvt */
  591. if(e->xbutton.type == MotionNotify) {
  592. if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
  593. return;
  594. button = ob + 32;
  595. ox = x, oy = y;
  596. } else if(!IS_SET(MODE_MOUSESGR)
  597. && (e->xbutton.type == ButtonRelease
  598. || button == AnyButton)) {
  599. button = 3;
  600. } else {
  601. button -= Button1;
  602. if(button >= 3)
  603. button += 64 - 3;
  604. if(e->xbutton.type == ButtonPress) {
  605. ob = button;
  606. ox = x, oy = y;
  607. }
  608. }
  609. button += (state & ShiftMask ? 4 : 0)
  610. + (state & Mod4Mask ? 8 : 0)
  611. + (state & ControlMask ? 16 : 0);
  612. len = 0;
  613. if(IS_SET(MODE_MOUSESGR)) {
  614. len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
  615. button, x+1, y+1,
  616. e->xbutton.type == ButtonRelease ? 'm' : 'M');
  617. } else if(x < 223 && y < 223) {
  618. len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
  619. 32+button, 32+x+1, 32+y+1);
  620. } else {
  621. return;
  622. }
  623. ttywrite(buf, len);
  624. }
  625. void
  626. bpress(XEvent *e) {
  627. if(IS_SET(MODE_MOUSE)) {
  628. mousereport(e);
  629. } else if(e->xbutton.button == Button1) {
  630. if(sel.bx != -1) {
  631. sel.bx = -1;
  632. tsetdirt(sel.b.y, sel.e.y);
  633. draw();
  634. }
  635. sel.mode = 1;
  636. sel.ex = sel.bx = x2col(e->xbutton.x);
  637. sel.ey = sel.by = y2row(e->xbutton.y);
  638. } else if(e->xbutton.button == Button4) {
  639. ttywrite("\031", 1);
  640. } else if(e->xbutton.button == Button5) {
  641. ttywrite("\005", 1);
  642. }
  643. }
  644. void
  645. selcopy(void) {
  646. char *str, *ptr, *p;
  647. int x, y, bufsize, is_selected = 0, size;
  648. Glyph *gp, *last;
  649. if(sel.bx == -1) {
  650. str = NULL;
  651. } else {
  652. bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
  653. ptr = str = xmalloc(bufsize);
  654. /* append every set & selected glyph to the selection */
  655. for(y = 0; y < term.row; y++) {
  656. gp = &term.line[y][0];
  657. last = gp + term.col;
  658. while(--last >= gp && !(last->state & GLYPH_SET))
  659. /* nothing */;
  660. for(x = 0; gp <= last; x++, ++gp) {
  661. if(!(is_selected = selected(x, y)))
  662. continue;
  663. p = (gp->state & GLYPH_SET) ? gp->c : " ";
  664. size = utf8size(p);
  665. memcpy(ptr, p, size);
  666. ptr += size;
  667. }
  668. /* \n at the end of every selected line except for the last one */
  669. if(is_selected && y < sel.e.y)
  670. *ptr++ = '\n';
  671. }
  672. *ptr = 0;
  673. }
  674. xsetsel(str);
  675. }
  676. void
  677. selnotify(XEvent *e) {
  678. ulong nitems, ofs, rem;
  679. int format;
  680. uchar *data;
  681. Atom type;
  682. ofs = 0;
  683. do {
  684. if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
  685. False, AnyPropertyType, &type, &format,
  686. &nitems, &rem, &data)) {
  687. fprintf(stderr, "Clipboard allocation failed\n");
  688. return;
  689. }
  690. ttywrite((const char *) data, nitems * format / 8);
  691. XFree(data);
  692. /* number of 32-bit chunks returned */
  693. ofs += nitems * format / 32;
  694. } while(rem > 0);
  695. }
  696. void
  697. selpaste(const Arg *dummy) {
  698. XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
  699. xw.win, CurrentTime);
  700. }
  701. void selclear(XEvent *e) {
  702. if(sel.bx == -1)
  703. return;
  704. sel.bx = -1;
  705. tsetdirt(sel.b.y, sel.e.y);
  706. }
  707. void
  708. selrequest(XEvent *e) {
  709. XSelectionRequestEvent *xsre;
  710. XSelectionEvent xev;
  711. Atom xa_targets, string;
  712. xsre = (XSelectionRequestEvent *) e;
  713. xev.type = SelectionNotify;
  714. xev.requestor = xsre->requestor;
  715. xev.selection = xsre->selection;
  716. xev.target = xsre->target;
  717. xev.time = xsre->time;
  718. /* reject */
  719. xev.property = None;
  720. xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
  721. if(xsre->target == xa_targets) {
  722. /* respond with the supported type */
  723. string = sel.xtarget;
  724. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  725. XA_ATOM, 32, PropModeReplace,
  726. (uchar *) &string, 1);
  727. xev.property = xsre->property;
  728. } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
  729. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  730. xsre->target, 8, PropModeReplace,
  731. (uchar *) sel.clip, strlen(sel.clip));
  732. xev.property = xsre->property;
  733. }
  734. /* all done, send a notification to the listener */
  735. if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
  736. fprintf(stderr, "Error sending SelectionNotify event\n");
  737. }
  738. void
  739. xsetsel(char *str) {
  740. /* register the selection for both the clipboard and the primary */
  741. Atom clipboard;
  742. free(sel.clip);
  743. sel.clip = str;
  744. XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
  745. clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
  746. XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
  747. }
  748. void
  749. brelease(XEvent *e) {
  750. struct timeval now;
  751. if(IS_SET(MODE_MOUSE)) {
  752. mousereport(e);
  753. return;
  754. }
  755. if(e->xbutton.button == Button2) {
  756. selpaste(NULL);
  757. } else if(e->xbutton.button == Button1) {
  758. sel.mode = 0;
  759. getbuttoninfo(e);
  760. term.dirty[sel.ey] = 1;
  761. if(sel.bx == sel.ex && sel.by == sel.ey) {
  762. sel.bx = -1;
  763. gettimeofday(&now, NULL);
  764. if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
  765. /* triple click on the line */
  766. sel.b.x = sel.bx = 0;
  767. sel.e.x = sel.ex = term.col;
  768. sel.b.y = sel.e.y = sel.ey;
  769. selcopy();
  770. } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
  771. /* double click to select word */
  772. sel.bx = sel.ex;
  773. while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
  774. term.line[sel.ey][sel.bx-1].c[0] != ' ') {
  775. sel.bx--;
  776. }
  777. sel.b.x = sel.bx;
  778. while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
  779. term.line[sel.ey][sel.ex+1].c[0] != ' ') {
  780. sel.ex++;
  781. }
  782. sel.e.x = sel.ex;
  783. sel.b.y = sel.e.y = sel.ey;
  784. selcopy();
  785. }
  786. } else {
  787. selcopy();
  788. }
  789. }
  790. memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
  791. gettimeofday(&sel.tclick1, NULL);
  792. }
  793. void
  794. bmotion(XEvent *e) {
  795. int starty, endy, oldey, oldex;
  796. if(IS_SET(MODE_MOUSE)) {
  797. mousereport(e);
  798. return;
  799. }
  800. if(!sel.mode)
  801. return;
  802. oldey = sel.ey;
  803. oldex = sel.ex;
  804. getbuttoninfo(e);
  805. if(oldey != sel.ey || oldex != sel.ex) {
  806. starty = MIN(oldey, sel.ey);
  807. endy = MAX(oldey, sel.ey);
  808. tsetdirt(starty, endy);
  809. }
  810. }
  811. void
  812. die(const char *errstr, ...) {
  813. va_list ap;
  814. va_start(ap, errstr);
  815. vfprintf(stderr, errstr, ap);
  816. va_end(ap);
  817. exit(EXIT_FAILURE);
  818. }
  819. void
  820. execsh(void) {
  821. char **args;
  822. char *envshell = getenv("SHELL");
  823. const struct passwd *pass = getpwuid(getuid());
  824. char buf[sizeof(long) * 8 + 1];
  825. unsetenv("COLUMNS");
  826. unsetenv("LINES");
  827. unsetenv("TERMCAP");
  828. if(pass) {
  829. setenv("LOGNAME", pass->pw_name, 1);
  830. setenv("USER", pass->pw_name, 1);
  831. setenv("SHELL", pass->pw_shell, 0);
  832. setenv("HOME", pass->pw_dir, 0);
  833. }
  834. snprintf(buf, sizeof(buf), "%lu", xw.win);
  835. setenv("WINDOWID", buf, 1);
  836. signal(SIGCHLD, SIG_DFL);
  837. signal(SIGHUP, SIG_DFL);
  838. signal(SIGINT, SIG_DFL);
  839. signal(SIGQUIT, SIG_DFL);
  840. signal(SIGTERM, SIG_DFL);
  841. signal(SIGALRM, SIG_DFL);
  842. DEFAULT(envshell, shell);
  843. setenv("TERM", termname, 1);
  844. args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
  845. execvp(args[0], args);
  846. exit(EXIT_FAILURE);
  847. }
  848. void
  849. sigchld(int a) {
  850. int stat = 0;
  851. if(waitpid(pid, &stat, 0) < 0)
  852. die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
  853. if(WIFEXITED(stat)) {
  854. exit(WEXITSTATUS(stat));
  855. } else {
  856. exit(EXIT_FAILURE);
  857. }
  858. }
  859. void
  860. ttynew(void) {
  861. int m, s;
  862. struct winsize w = {term.row, term.col, 0, 0};
  863. /* seems to work fine on linux, openbsd and freebsd */
  864. if(openpty(&m, &s, NULL, NULL, &w) < 0)
  865. die("openpty failed: %s\n", SERRNO);
  866. switch(pid = fork()) {
  867. case -1:
  868. die("fork failed\n");
  869. break;
  870. case 0:
  871. setsid(); /* create a new process group */
  872. dup2(s, STDIN_FILENO);
  873. dup2(s, STDOUT_FILENO);
  874. dup2(s, STDERR_FILENO);
  875. if(ioctl(s, TIOCSCTTY, NULL) < 0)
  876. die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
  877. close(s);
  878. close(m);
  879. execsh();
  880. break;
  881. default:
  882. close(s);
  883. cmdfd = m;
  884. signal(SIGCHLD, sigchld);
  885. if(opt_io) {
  886. iofd = (!strcmp(opt_io, "-")) ?
  887. STDOUT_FILENO :
  888. open(opt_io, O_WRONLY | O_CREAT, 0666);
  889. if(iofd < 0) {
  890. fprintf(stderr, "Error opening %s:%s\n",
  891. opt_io, strerror(errno));
  892. }
  893. }
  894. }
  895. }
  896. void
  897. dump(char c) {
  898. static int col;
  899. fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
  900. if(++col % 10 == 0)
  901. fprintf(stderr, "\n");
  902. }
  903. void
  904. ttyread(void) {
  905. static char buf[BUFSIZ];
  906. static int buflen = 0;
  907. char *ptr;
  908. char s[UTF_SIZ];
  909. int charsize; /* size of utf8 char in bytes */
  910. long utf8c;
  911. int ret;
  912. /* append read bytes to unprocessed bytes */
  913. if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
  914. die("Couldn't read from shell: %s\n", SERRNO);
  915. /* process every complete utf8 char */
  916. buflen += ret;
  917. ptr = buf;
  918. while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
  919. charsize = utf8decode(ptr, &utf8c);
  920. utf8encode(&utf8c, s);
  921. tputc(s, charsize);
  922. ptr += charsize;
  923. buflen -= charsize;
  924. }
  925. /* keep any uncomplete utf8 char for the next call */
  926. memmove(buf, ptr, buflen);
  927. }
  928. void
  929. ttywrite(const char *s, size_t n) {
  930. if(write(cmdfd, s, n) == -1)
  931. die("write error on tty: %s\n", SERRNO);
  932. }
  933. void
  934. ttyresize(void) {
  935. struct winsize w;
  936. w.ws_row = term.row;
  937. w.ws_col = term.col;
  938. w.ws_xpixel = xw.tw;
  939. w.ws_ypixel = xw.th;
  940. if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
  941. fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
  942. }
  943. void
  944. tsetdirt(int top, int bot) {
  945. int i;
  946. LIMIT(top, 0, term.row-1);
  947. LIMIT(bot, 0, term.row-1);
  948. for(i = top; i <= bot; i++)
  949. term.dirty[i] = 1;
  950. }
  951. void
  952. tfulldirt(void) {
  953. tsetdirt(0, term.row-1);
  954. }
  955. void
  956. tcursor(int mode) {
  957. static TCursor c;
  958. if(mode == CURSOR_SAVE) {
  959. c = term.c;
  960. } else if(mode == CURSOR_LOAD) {
  961. term.c = c;
  962. tmoveto(c.x, c.y);
  963. }
  964. }
  965. void
  966. treset(void) {
  967. uint i;
  968. term.c = (TCursor){{
  969. .mode = ATTR_NULL,
  970. .fg = defaultfg,
  971. .bg = defaultbg
  972. }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
  973. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  974. for(i = tabspaces; i < term.col; i += tabspaces)
  975. term.tabs[i] = 1;
  976. term.top = 0;
  977. term.bot = term.row - 1;
  978. term.mode = MODE_WRAP;
  979. tclearregion(0, 0, term.col-1, term.row-1, 0);
  980. tmoveto(0, 0);
  981. tcursor(CURSOR_SAVE);
  982. }
  983. void
  984. tnew(int col, int row) {
  985. /* set screen size */
  986. term.row = row;
  987. term.col = col;
  988. term.line = xmalloc(term.row * sizeof(Line));
  989. term.alt = xmalloc(term.row * sizeof(Line));
  990. term.dirty = xmalloc(term.row * sizeof(*term.dirty));
  991. term.tabs = xmalloc(term.col * sizeof(*term.tabs));
  992. for(row = 0; row < term.row; row++) {
  993. term.line[row] = xmalloc(term.col * sizeof(Glyph));
  994. term.alt [row] = xmalloc(term.col * sizeof(Glyph));
  995. term.dirty[row] = 0;
  996. }
  997. term.numlock = 1;
  998. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  999. /* setup screen */
  1000. treset();
  1001. }
  1002. void
  1003. tswapscreen(void) {
  1004. Line *tmp = term.line;
  1005. term.line = term.alt;
  1006. term.alt = tmp;
  1007. term.mode ^= MODE_ALTSCREEN;
  1008. tfulldirt();
  1009. }
  1010. void
  1011. tscrolldown(int orig, int n) {
  1012. int i;
  1013. Line temp;
  1014. LIMIT(n, 0, term.bot-orig+1);
  1015. tclearregion(0, term.bot-n+1, term.col-1, term.bot, 0);
  1016. for(i = term.bot; i >= orig+n; i--) {
  1017. temp = term.line[i];
  1018. term.line[i] = term.line[i-n];
  1019. term.line[i-n] = temp;
  1020. term.dirty[i] = 1;
  1021. term.dirty[i-n] = 1;
  1022. }
  1023. selscroll(orig, n);
  1024. }
  1025. void
  1026. tscrollup(int orig, int n) {
  1027. int i;
  1028. Line temp;
  1029. LIMIT(n, 0, term.bot-orig+1);
  1030. tclearregion(0, orig, term.col-1, orig+n-1, 0);
  1031. for(i = orig; i <= term.bot-n; i++) {
  1032. temp = term.line[i];
  1033. term.line[i] = term.line[i+n];
  1034. term.line[i+n] = temp;
  1035. term.dirty[i] = 1;
  1036. term.dirty[i+n] = 1;
  1037. }
  1038. selscroll(orig, -n);
  1039. }
  1040. void
  1041. selscroll(int orig, int n) {
  1042. if(sel.bx == -1)
  1043. return;
  1044. if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
  1045. if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
  1046. sel.bx = -1;
  1047. return;
  1048. }
  1049. if(sel.by < term.top) {
  1050. sel.by = term.top;
  1051. sel.bx = 0;
  1052. }
  1053. if(sel.ey > term.bot) {
  1054. sel.ey = term.bot;
  1055. sel.ex = term.col;
  1056. }
  1057. sel.b.y = sel.by, sel.b.x = sel.bx;
  1058. sel.e.y = sel.ey, sel.e.x = sel.ex;
  1059. }
  1060. }
  1061. void
  1062. tnewline(int first_col) {
  1063. int y = term.c.y;
  1064. if(y == term.bot) {
  1065. tscrollup(term.top, 1);
  1066. } else {
  1067. y++;
  1068. }
  1069. tmoveto(first_col ? 0 : term.c.x, y);
  1070. }
  1071. void
  1072. csiparse(void) {
  1073. /* int noarg = 1; */
  1074. char *p = csiescseq.buf;
  1075. csiescseq.narg = 0;
  1076. if(*p == '?')
  1077. csiescseq.priv = 1, p++;
  1078. while(p < csiescseq.buf+csiescseq.len) {
  1079. while(isdigit(*p)) {
  1080. csiescseq.arg[csiescseq.narg] *= 10;
  1081. csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
  1082. }
  1083. if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ) {
  1084. csiescseq.narg++, p++;
  1085. } else {
  1086. csiescseq.mode = *p;
  1087. csiescseq.narg++;
  1088. return;
  1089. }
  1090. }
  1091. }
  1092. /* for absolute user moves, when decom is set */
  1093. void
  1094. tmoveato(int x, int y) {
  1095. tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
  1096. }
  1097. void
  1098. tmoveto(int x, int y) {
  1099. int miny, maxy;
  1100. if(term.c.state & CURSOR_ORIGIN) {
  1101. miny = term.top;
  1102. maxy = term.bot;
  1103. } else {
  1104. miny = 0;
  1105. maxy = term.row - 1;
  1106. }
  1107. LIMIT(x, 0, term.col-1);
  1108. LIMIT(y, miny, maxy);
  1109. term.c.state &= ~CURSOR_WRAPNEXT;
  1110. term.c.x = x;
  1111. term.c.y = y;
  1112. }
  1113. void
  1114. tsetchar(char *c, Glyph *attr, int x, int y) {
  1115. static char *vt100_0[62] = { /* 0x41 - 0x7e */
  1116. "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
  1117. 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
  1118. 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
  1119. 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
  1120. "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
  1121. "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
  1122. "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
  1123. "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
  1124. };
  1125. /*
  1126. * The table is proudly stolen from rxvt.
  1127. */
  1128. if(attr->mode & ATTR_GFX) {
  1129. if(c[0] >= 0x41 && c[0] <= 0x7e
  1130. && vt100_0[c[0] - 0x41]) {
  1131. c = vt100_0[c[0] - 0x41];
  1132. }
  1133. }
  1134. term.dirty[y] = 1;
  1135. term.line[y][x] = *attr;
  1136. memcpy(term.line[y][x].c, c, UTF_SIZ);
  1137. term.line[y][x].state |= GLYPH_SET;
  1138. }
  1139. void
  1140. tclearregion(int x1, int y1, int x2, int y2, int bce) {
  1141. int x, y, temp;
  1142. if(x1 > x2)
  1143. temp = x1, x1 = x2, x2 = temp;
  1144. if(y1 > y2)
  1145. temp = y1, y1 = y2, y2 = temp;
  1146. LIMIT(x1, 0, term.col-1);
  1147. LIMIT(x2, 0, term.col-1);
  1148. LIMIT(y1, 0, term.row-1);
  1149. LIMIT(y2, 0, term.row-1);
  1150. for(y = y1; y <= y2; y++) {
  1151. term.dirty[y] = 1;
  1152. for(x = x1; x <= x2; x++) {
  1153. if(bce) {
  1154. term.line[y][x] = term.c.attr;
  1155. memcpy(term.line[y][x].c, " ", 2);
  1156. term.line[y][x].state |= GLYPH_SET;
  1157. } else {
  1158. term.line[y][x].state = 0;
  1159. }
  1160. }
  1161. }
  1162. }
  1163. void
  1164. tdeletechar(int n) {
  1165. int src = term.c.x + n;
  1166. int dst = term.c.x;
  1167. int size = term.col - src;
  1168. term.dirty[term.c.y] = 1;
  1169. if(src >= term.col) {
  1170. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
  1171. return;
  1172. }
  1173. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
  1174. size * sizeof(Glyph));
  1175. tclearregion(term.col-n, term.c.y, term.col-1, term.c.y, 0);
  1176. }
  1177. void
  1178. tinsertblank(int n) {
  1179. int src = term.c.x;
  1180. int dst = src + n;
  1181. int size = term.col - dst;
  1182. term.dirty[term.c.y] = 1;
  1183. if(dst >= term.col) {
  1184. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 0);
  1185. return;
  1186. }
  1187. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
  1188. size * sizeof(Glyph));
  1189. tclearregion(src, term.c.y, dst - 1, term.c.y, 0);
  1190. }
  1191. void
  1192. tinsertblankline(int n) {
  1193. if(term.c.y < term.top || term.c.y > term.bot)
  1194. return;
  1195. tscrolldown(term.c.y, n);
  1196. }
  1197. void
  1198. tdeleteline(int n) {
  1199. if(term.c.y < term.top || term.c.y > term.bot)
  1200. return;
  1201. tscrollup(term.c.y, n);
  1202. }
  1203. void
  1204. tsetattr(int *attr, int l) {
  1205. int i;
  1206. for(i = 0; i < l; i++) {
  1207. switch(attr[i]) {
  1208. case 0:
  1209. term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
  1210. | ATTR_ITALIC | ATTR_BLINK);
  1211. term.c.attr.fg = defaultfg;
  1212. term.c.attr.bg = defaultbg;
  1213. break;
  1214. case 1:
  1215. term.c.attr.mode |= ATTR_BOLD;
  1216. break;
  1217. case 3:
  1218. term.c.attr.mode |= ATTR_ITALIC;
  1219. break;
  1220. case 4:
  1221. term.c.attr.mode |= ATTR_UNDERLINE;
  1222. break;
  1223. case 5: /* slow blink */
  1224. case 6: /* rapid blink */
  1225. term.c.attr.mode |= ATTR_BLINK;
  1226. break;
  1227. case 7:
  1228. term.c.attr.mode |= ATTR_REVERSE;
  1229. break;
  1230. case 21:
  1231. case 22:
  1232. term.c.attr.mode &= ~ATTR_BOLD;
  1233. break;
  1234. case 23:
  1235. term.c.attr.mode &= ~ATTR_ITALIC;
  1236. break;
  1237. case 24:
  1238. term.c.attr.mode &= ~ATTR_UNDERLINE;
  1239. break;
  1240. case 25:
  1241. case 26:
  1242. term.c.attr.mode &= ~ATTR_BLINK;
  1243. break;
  1244. case 27:
  1245. term.c.attr.mode &= ~ATTR_REVERSE;
  1246. break;
  1247. case 38:
  1248. if(i + 2 < l && attr[i + 1] == 5) {
  1249. i += 2;
  1250. if(BETWEEN(attr[i], 0, 255)) {
  1251. term.c.attr.fg = attr[i];
  1252. } else {
  1253. fprintf(stderr,
  1254. "erresc: bad fgcolor %d\n",
  1255. attr[i]);
  1256. }
  1257. } else {
  1258. fprintf(stderr,
  1259. "erresc(38): gfx attr %d unknown\n",
  1260. attr[i]);
  1261. }
  1262. break;
  1263. case 39:
  1264. term.c.attr.fg = defaultfg;
  1265. break;
  1266. case 48:
  1267. if(i + 2 < l && attr[i + 1] == 5) {
  1268. i += 2;
  1269. if(BETWEEN(attr[i], 0, 255)) {
  1270. term.c.attr.bg = attr[i];
  1271. } else {
  1272. fprintf(stderr,
  1273. "erresc: bad bgcolor %d\n",
  1274. attr[i]);
  1275. }
  1276. } else {
  1277. fprintf(stderr,
  1278. "erresc(48): gfx attr %d unknown\n",
  1279. attr[i]);
  1280. }
  1281. break;
  1282. case 49:
  1283. term.c.attr.bg = defaultbg;
  1284. break;
  1285. default:
  1286. if(BETWEEN(attr[i], 30, 37)) {
  1287. term.c.attr.fg = attr[i] - 30;
  1288. } else if(BETWEEN(attr[i], 40, 47)) {
  1289. term.c.attr.bg = attr[i] - 40;
  1290. } else if(BETWEEN(attr[i], 90, 97)) {
  1291. term.c.attr.fg = attr[i] - 90 + 8;
  1292. } else if(BETWEEN(attr[i], 100, 107)) {
  1293. term.c.attr.bg = attr[i] - 100 + 8;
  1294. } else {
  1295. fprintf(stderr,
  1296. "erresc(default): gfx attr %d unknown\n",
  1297. attr[i]), csidump();
  1298. }
  1299. break;
  1300. }
  1301. }
  1302. }
  1303. void
  1304. tsetscroll(int t, int b) {
  1305. int temp;
  1306. LIMIT(t, 0, term.row-1);
  1307. LIMIT(b, 0, term.row-1);
  1308. if(t > b) {
  1309. temp = t;
  1310. t = b;
  1311. b = temp;
  1312. }
  1313. term.top = t;
  1314. term.bot = b;
  1315. }
  1316. #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
  1317. void
  1318. tsetmode(bool priv, bool set, int *args, int narg) {
  1319. int *lim, mode;
  1320. bool alt;
  1321. for(lim = args + narg; args < lim; ++args) {
  1322. if(priv) {
  1323. switch(*args) {
  1324. break;
  1325. case 1: /* DECCKM -- Cursor key */
  1326. MODBIT(term.mode, set, MODE_APPCURSOR);
  1327. break;
  1328. case 5: /* DECSCNM -- Reverse video */
  1329. mode = term.mode;
  1330. MODBIT(term.mode, set, MODE_REVERSE);
  1331. if(mode != term.mode)
  1332. redraw(REDRAW_TIMEOUT);
  1333. break;
  1334. case 6: /* DECOM -- Origin */
  1335. MODBIT(term.c.state, set, CURSOR_ORIGIN);
  1336. tmoveato(0, 0);
  1337. break;
  1338. case 7: /* DECAWM -- Auto wrap */
  1339. MODBIT(term.mode, set, MODE_WRAP);
  1340. break;
  1341. case 0: /* Error (IGNORED) */
  1342. case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
  1343. case 3: /* DECCOLM -- Column (IGNORED) */
  1344. case 4: /* DECSCLM -- Scroll (IGNORED) */
  1345. case 8: /* DECARM -- Auto repeat (IGNORED) */
  1346. case 18: /* DECPFF -- Printer feed (IGNORED) */
  1347. case 19: /* DECPEX -- Printer extent (IGNORED) */
  1348. case 42: /* DECNRCM -- National characters (IGNORED) */
  1349. case 12: /* att610 -- Start blinking cursor (IGNORED) */
  1350. break;
  1351. case 25: /* DECTCEM -- Text Cursor Enable Mode */
  1352. MODBIT(term.mode, !set, MODE_HIDE);
  1353. break;
  1354. case 1000: /* 1000,1002: enable xterm mouse report */
  1355. MODBIT(term.mode, set, MODE_MOUSEBTN);
  1356. MODBIT(term.mode, 0, MODE_MOUSEMOTION);
  1357. break;
  1358. case 1002:
  1359. MODBIT(term.mode, set, MODE_MOUSEMOTION);
  1360. MODBIT(term.mode, 0, MODE_MOUSEBTN);
  1361. break;
  1362. case 1006:
  1363. MODBIT(term.mode, set, MODE_MOUSESGR);
  1364. break;
  1365. case 1049: /* = 1047 and 1048 */
  1366. case 47:
  1367. case 1047: {
  1368. alt = IS_SET(MODE_ALTSCREEN);
  1369. if(alt) {
  1370. tclearregion(0, 0, term.col-1,
  1371. term.row-1, 0);
  1372. }
  1373. if(set ^ alt) /* set is always 1 or 0 */
  1374. tswapscreen();
  1375. if(*args != 1049)
  1376. break;
  1377. }
  1378. /* pass through */
  1379. case 1048:
  1380. tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
  1381. break;
  1382. default:
  1383. fprintf(stderr,
  1384. "erresc: unknown private set/reset mode %d\n",
  1385. *args);
  1386. break;
  1387. }
  1388. } else {
  1389. switch(*args) {
  1390. case 0: /* Error (IGNORED) */
  1391. break;
  1392. case 2: /* KAM -- keyboard action */
  1393. MODBIT(term.mode, set, MODE_KBDLOCK);
  1394. break;
  1395. case 4: /* IRM -- Insertion-replacement */
  1396. MODBIT(term.mode, set, MODE_INSERT);
  1397. break;
  1398. case 12: /* SRM -- Send/Receive */
  1399. MODBIT(term.mode, !set, MODE_ECHO);
  1400. break;
  1401. case 20: /* LNM -- Linefeed/new line */
  1402. MODBIT(term.mode, set, MODE_CRLF);
  1403. break;
  1404. default:
  1405. fprintf(stderr,
  1406. "erresc: unknown set/reset mode %d\n",
  1407. *args);
  1408. break;
  1409. }
  1410. }
  1411. }
  1412. }
  1413. #undef MODBIT
  1414. void
  1415. csihandle(void) {
  1416. switch(csiescseq.mode) {
  1417. default:
  1418. unknown:
  1419. fprintf(stderr, "erresc: unknown csi ");
  1420. csidump();
  1421. /* die(""); */
  1422. break;
  1423. case '@': /* ICH -- Insert <n> blank char */
  1424. DEFAULT(csiescseq.arg[0], 1);
  1425. tinsertblank(csiescseq.arg[0]);
  1426. break;
  1427. case 'A': /* CUU -- Cursor <n> Up */
  1428. DEFAULT(csiescseq.arg[0], 1);
  1429. tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
  1430. break;
  1431. case 'B': /* CUD -- Cursor <n> Down */
  1432. case 'e': /* VPR --Cursor <n> Down */
  1433. DEFAULT(csiescseq.arg[0], 1);
  1434. tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
  1435. break;
  1436. case 'c': /* DA -- Device Attributes */
  1437. if(csiescseq.arg[0] == 0)
  1438. ttywrite(VT102ID, sizeof(VT102ID) - 1);
  1439. break;
  1440. case 'C': /* CUF -- Cursor <n> Forward */
  1441. case 'a': /* HPR -- Cursor <n> Forward */
  1442. DEFAULT(csiescseq.arg[0], 1);
  1443. tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
  1444. break;
  1445. case 'D': /* CUB -- Cursor <n> Backward */
  1446. DEFAULT(csiescseq.arg[0], 1);
  1447. tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
  1448. break;
  1449. case 'E': /* CNL -- Cursor <n> Down and first col */
  1450. DEFAULT(csiescseq.arg[0], 1);
  1451. tmoveto(0, term.c.y+csiescseq.arg[0]);
  1452. break;
  1453. case 'F': /* CPL -- Cursor <n> Up and first col */
  1454. DEFAULT(csiescseq.arg[0], 1);
  1455. tmoveto(0, term.c.y-csiescseq.arg[0]);
  1456. break;
  1457. case 'g': /* TBC -- Tabulation clear */
  1458. switch(csiescseq.arg[0]) {
  1459. case 0: /* clear current tab stop */
  1460. term.tabs[term.c.x] = 0;
  1461. break;
  1462. case 3: /* clear all the tabs */
  1463. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  1464. break;
  1465. default:
  1466. goto unknown;
  1467. }
  1468. break;
  1469. case 'G': /* CHA -- Move to <col> */
  1470. case '`': /* HPA */
  1471. DEFAULT(csiescseq.arg[0], 1);
  1472. tmoveto(csiescseq.arg[0]-1, term.c.y);
  1473. break;
  1474. case 'H': /* CUP -- Move to <row> <col> */
  1475. case 'f': /* HVP */
  1476. DEFAULT(csiescseq.arg[0], 1);
  1477. DEFAULT(csiescseq.arg[1], 1);
  1478. tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
  1479. break;
  1480. case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
  1481. DEFAULT(csiescseq.arg[0], 1);
  1482. while(csiescseq.arg[0]--)
  1483. tputtab(1);
  1484. break;
  1485. case 'J': /* ED -- Clear screen */
  1486. sel.bx = -1;
  1487. switch(csiescseq.arg[0]) {
  1488. case 0: /* below */
  1489. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
  1490. if(term.c.y < term.row-1) {
  1491. tclearregion(0, term.c.y+1, term.col-1,
  1492. term.row-1, 1);
  1493. }
  1494. break;
  1495. case 1: /* above */
  1496. if(term.c.y > 1)
  1497. tclearregion(0, 0, term.col-1, term.c.y-1, 1);
  1498. tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
  1499. break;
  1500. case 2: /* all */
  1501. tclearregion(0, 0, term.col-1, term.row-1, 1);
  1502. break;
  1503. default:
  1504. goto unknown;
  1505. }
  1506. break;
  1507. case 'K': /* EL -- Clear line */
  1508. switch(csiescseq.arg[0]) {
  1509. case 0: /* right */
  1510. tclearregion(term.c.x, term.c.y, term.col-1,
  1511. term.c.y, 1);
  1512. break;
  1513. case 1: /* left */
  1514. tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
  1515. break;
  1516. case 2: /* all */
  1517. tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
  1518. break;
  1519. }
  1520. break;
  1521. case 'S': /* SU -- Scroll <n> line up */
  1522. DEFAULT(csiescseq.arg[0], 1);
  1523. tscrollup(term.top, csiescseq.arg[0]);
  1524. break;
  1525. case 'T': /* SD -- Scroll <n> line down */
  1526. DEFAULT(csiescseq.arg[0], 1);
  1527. tscrolldown(term.top, csiescseq.arg[0]);
  1528. break;
  1529. case 'L': /* IL -- Insert <n> blank lines */
  1530. DEFAULT(csiescseq.arg[0], 1);
  1531. tinsertblankline(csiescseq.arg[0]);
  1532. break;
  1533. case 'l': /* RM -- Reset Mode */
  1534. tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
  1535. break;
  1536. case 'M': /* DL -- Delete <n> lines */
  1537. DEFAULT(csiescseq.arg[0], 1);
  1538. tdeleteline(csiescseq.arg[0]);
  1539. break;
  1540. case 'X': /* ECH -- Erase <n> char */
  1541. DEFAULT(csiescseq.arg[0], 1);
  1542. tclearregion(term.c.x, term.c.y,
  1543. term.c.x + csiescseq.arg[0] - 1, term.c.y, 1);
  1544. break;
  1545. case 'P': /* DCH -- Delete <n> char */
  1546. DEFAULT(csiescseq.arg[0], 1);
  1547. tdeletechar(csiescseq.arg[0]);
  1548. break;
  1549. case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
  1550. DEFAULT(csiescseq.arg[0], 1);
  1551. while(csiescseq.arg[0]--)
  1552. tputtab(0);
  1553. break;
  1554. case 'd': /* VPA -- Move to <row> */
  1555. DEFAULT(csiescseq.arg[0], 1);
  1556. tmoveato(term.c.x, csiescseq.arg[0]-1);
  1557. break;
  1558. case 'h': /* SM -- Set terminal mode */
  1559. tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
  1560. break;
  1561. case 'm': /* SGR -- Terminal attribute (color) */
  1562. tsetattr(csiescseq.arg, csiescseq.narg);
  1563. break;
  1564. case 'r': /* DECSTBM -- Set Scrolling Region */
  1565. if(csiescseq.priv) {
  1566. goto unknown;
  1567. } else {
  1568. DEFAULT(csiescseq.arg[0], 1);
  1569. DEFAULT(csiescseq.arg[1], term.row);
  1570. tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
  1571. tmoveato(0, 0);
  1572. }
  1573. break;
  1574. case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
  1575. tcursor(CURSOR_SAVE);
  1576. break;
  1577. case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
  1578. tcursor(CURSOR_LOAD);
  1579. break;
  1580. }
  1581. }
  1582. void
  1583. csidump(void) {
  1584. int i;
  1585. uint c;
  1586. printf("ESC[");
  1587. for(i = 0; i < csiescseq.len; i++) {
  1588. c = csiescseq.buf[i] & 0xff;
  1589. if(isprint(c)) {
  1590. putchar(c);
  1591. } else if(c == '\n') {
  1592. printf("(\\n)");
  1593. } else if(c == '\r') {
  1594. printf("(\\r)");
  1595. } else if(c == 0x1b) {
  1596. printf("(\\e)");
  1597. } else {
  1598. printf("(%02x)", c);
  1599. }
  1600. }
  1601. putchar('\n');
  1602. }
  1603. void
  1604. csireset(void) {
  1605. memset(&csiescseq, 0, sizeof(csiescseq));
  1606. }
  1607. void
  1608. strhandle(void) {
  1609. char *p;
  1610. /*
  1611. * TODO: make this being useful in case of color palette change.
  1612. */
  1613. strparse();
  1614. p = strescseq.buf;
  1615. switch(strescseq.type) {
  1616. case ']': /* OSC -- Operating System Command */
  1617. switch(p[0]) {
  1618. case '0':
  1619. case '1':
  1620. case '2':
  1621. /*
  1622. * TODO: Handle special chars in string, like umlauts.
  1623. */
  1624. if(p[1] == ';') {
  1625. XStoreName(xw.dpy, xw.win, strescseq.buf+2);
  1626. }
  1627. break;
  1628. case ';':
  1629. XStoreName(xw.dpy, xw.win, strescseq.buf+1);
  1630. break;
  1631. case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
  1632. break;
  1633. default:
  1634. fprintf(stderr, "erresc: unknown str ");
  1635. strdump();
  1636. break;
  1637. }
  1638. break;
  1639. case 'k': /* old title set compatibility */
  1640. XStoreName(xw.dpy, xw.win, strescseq.buf);
  1641. break;
  1642. case 'P': /* DSC -- Device Control String */
  1643. case '_': /* APC -- Application Program Command */
  1644. case '^': /* PM -- Privacy Message */
  1645. default:
  1646. fprintf(stderr, "erresc: unknown str ");
  1647. strdump();
  1648. /* die(""); */
  1649. break;
  1650. }
  1651. }
  1652. void
  1653. strparse(void) {
  1654. /*
  1655. * TODO: Implement parsing like for CSI when required.
  1656. * Format: ESC type cmd ';' arg0 [';' argn] ESC \
  1657. */
  1658. return;
  1659. }
  1660. void
  1661. strdump(void) {
  1662. int i;
  1663. uint c;
  1664. printf("ESC%c", strescseq.type);
  1665. for(i = 0; i < strescseq.len; i++) {
  1666. c = strescseq.buf[i] & 0xff;
  1667. if(isprint(c)) {
  1668. putchar(c);
  1669. } else if(c == '\n') {
  1670. printf("(\\n)");
  1671. } else if(c == '\r') {
  1672. printf("(\\r)");
  1673. } else if(c == 0x1b) {
  1674. printf("(\\e)");
  1675. } else {
  1676. printf("(%02x)", c);
  1677. }
  1678. }
  1679. printf("ESC\\\n");
  1680. }
  1681. void
  1682. strreset(void) {
  1683. memset(&strescseq, 0, sizeof(strescseq));
  1684. }
  1685. void
  1686. tputtab(bool forward) {
  1687. uint x = term.c.x;
  1688. if(forward) {
  1689. if(x == term.col)
  1690. return;
  1691. for(++x; x < term.col && !term.tabs[x]; ++x)
  1692. /* nothing */ ;
  1693. } else {
  1694. if(x == 0)
  1695. return;
  1696. for(--x; x > 0 && !term.tabs[x]; --x)
  1697. /* nothing */ ;
  1698. }
  1699. tmoveto(x, term.c.y);
  1700. }
  1701. void
  1702. techo(char *buf, int len) {
  1703. for(; len > 0; buf++, len--) {
  1704. char c = *buf;
  1705. if(c == '\033') { /* escape */
  1706. tputc("^", 1);
  1707. tputc("[", 1);
  1708. } else if(c < '\x20') { /* control code */
  1709. if(c != '\n' && c != '\r' && c != '\t') {
  1710. c |= '\x40';
  1711. tputc("^", 1);
  1712. }
  1713. tputc(&c, 1);
  1714. } else {
  1715. break;
  1716. }
  1717. }
  1718. if(len)
  1719. tputc(buf, len);
  1720. }
  1721. void
  1722. tputc(char *c, int len) {
  1723. uchar ascii = *c;
  1724. bool control = ascii < '\x20' || ascii == 0177;
  1725. if(iofd != -1) {
  1726. if(xwrite(iofd, c, len) < 0) {
  1727. fprintf(stderr, "Error writing in %s:%s\n",
  1728. opt_io, strerror(errno));
  1729. close(iofd);
  1730. iofd = -1;
  1731. }
  1732. }
  1733. /*
  1734. * STR sequences must be checked before anything else
  1735. * because it can use some control codes as part of the sequence.
  1736. */
  1737. if(term.esc & ESC_STR) {
  1738. switch(ascii) {
  1739. case '\033':
  1740. term.esc = ESC_START | ESC_STR_END;
  1741. break;
  1742. case '\a': /* backwards compatibility to xterm */
  1743. term.esc = 0;
  1744. strhandle();
  1745. break;
  1746. default:
  1747. if(strescseq.len + len < sizeof(strescseq.buf)) {
  1748. memmove(&strescseq.buf[strescseq.len], c, len);
  1749. strescseq.len += len;
  1750. } else {
  1751. /*
  1752. * Here is a bug in terminals. If the user never sends
  1753. * some code to stop the str or esc command, then st
  1754. * will stop responding. But this is better than
  1755. * silently failing with unknown characters. At least
  1756. * then users will report back.
  1757. *
  1758. * In the case users ever get fixed, here is the code:
  1759. */
  1760. /*
  1761. * term.esc = 0;
  1762. * strhandle();
  1763. */
  1764. }
  1765. }
  1766. return;
  1767. }
  1768. /*
  1769. * Actions of control codes must be performed as soon they arrive
  1770. * because they can be embedded inside a control sequence, and
  1771. * they must not cause conflicts with sequences.
  1772. */
  1773. if(control) {
  1774. switch(ascii) {
  1775. case '\t': /* HT */
  1776. tputtab(1);
  1777. return;
  1778. case '\b': /* BS */
  1779. tmoveto(term.c.x-1, term.c.y);
  1780. return;
  1781. case '\r': /* CR */
  1782. tmoveto(0, term.c.y);
  1783. return;
  1784. case '\f': /* LF */
  1785. case '\v': /* VT */
  1786. case '\n': /* LF */
  1787. /* go to first col if the mode is set */
  1788. tnewline(IS_SET(MODE_CRLF));
  1789. return;
  1790. case '\a': /* BEL */
  1791. if(!(xw.state & WIN_FOCUSED))
  1792. xseturgency(1);
  1793. return;
  1794. case '\033': /* ESC */
  1795. csireset();
  1796. term.esc = ESC_START;
  1797. return;
  1798. case '\016': /* SO */
  1799. case '\017': /* SI */
  1800. /*
  1801. * Different charsets are hard to handle. Applications
  1802. * should use the right alt charset escapes for the
  1803. * only reason they still exist: line drawing. The
  1804. * rest is incompatible history st should not support.
  1805. */
  1806. return;
  1807. case '\032': /* SUB */
  1808. case '\030': /* CAN */
  1809. csireset();
  1810. return;
  1811. case '\005': /* ENQ (IGNORED) */
  1812. case '\000': /* NUL (IGNORED) */
  1813. case '\021': /* XON (IGNORED) */
  1814. case '\023': /* XOFF (IGNORED) */
  1815. case 0177: /* DEL (IGNORED) */
  1816. return;
  1817. }
  1818. } else if(term.esc & ESC_START) {
  1819. if(term.esc & ESC_CSI) {
  1820. csiescseq.buf[csiescseq.len++] = ascii;
  1821. if(BETWEEN(ascii, 0x40, 0x7E)
  1822. || csiescseq.len >= ESC_BUF_SIZ) {
  1823. term.esc = 0;
  1824. csiparse(), csihandle();
  1825. }
  1826. } else if(term.esc & ESC_STR_END) {
  1827. term.esc = 0;
  1828. if(ascii == '\\')
  1829. strhandle();
  1830. } else if(term.esc & ESC_ALTCHARSET) {
  1831. switch(ascii) {
  1832. case '0': /* Line drawing set */
  1833. term.c.attr.mode |= ATTR_GFX;
  1834. break;
  1835. case 'B': /* USASCII */
  1836. term.c.attr.mode &= ~ATTR_GFX;
  1837. break;
  1838. case 'A': /* UK (IGNORED) */
  1839. case '<': /* multinational charset (IGNORED) */
  1840. case '5': /* Finnish (IGNORED) */
  1841. case 'C': /* Finnish (IGNORED) */
  1842. case 'K': /* German (IGNORED) */
  1843. break;
  1844. default:
  1845. fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
  1846. }
  1847. term.esc = 0;
  1848. } else if(term.esc & ESC_TEST) {
  1849. if(ascii == '8') { /* DEC screen alignment test. */
  1850. char E[UTF_SIZ] = "E";
  1851. int x, y;
  1852. for(x = 0; x < term.col; ++x) {
  1853. for(y = 0; y < term.row; ++y)
  1854. tsetchar(E, &term.c.attr, x, y);
  1855. }
  1856. }
  1857. term.esc = 0;
  1858. } else {
  1859. switch(ascii) {
  1860. case '[':
  1861. term.esc |= ESC_CSI;
  1862. break;
  1863. case '#':
  1864. term.esc |= ESC_TEST;
  1865. break;
  1866. case 'P': /* DCS -- Device Control String */
  1867. case '_': /* APC -- Application Program Command */
  1868. case '^': /* PM -- Privacy Message */
  1869. case ']': /* OSC -- Operating System Command */
  1870. case 'k': /* old title set compatibility */
  1871. strreset();
  1872. strescseq.type = ascii;
  1873. term.esc |= ESC_STR;
  1874. break;
  1875. case '(': /* set primary charset G0 */
  1876. term.esc |= ESC_ALTCHARSET;
  1877. break;
  1878. case ')': /* set secondary charset G1 (IGNORED) */
  1879. case '*': /* set tertiary charset G2 (IGNORED) */
  1880. case '+': /* set quaternary charset G3 (IGNORED) */
  1881. term.esc = 0;
  1882. break;
  1883. case 'D': /* IND -- Linefeed */
  1884. if(term.c.y == term.bot) {
  1885. tscrollup(term.top, 1);
  1886. } else {
  1887. tmoveto(term.c.x, term.c.y+1);
  1888. }
  1889. term.esc = 0;
  1890. break;
  1891. case 'E': /* NEL -- Next line */
  1892. tnewline(1); /* always go to first col */
  1893. term.esc = 0;
  1894. break;
  1895. case 'H': /* HTS -- Horizontal tab stop */
  1896. term.tabs[term.c.x] = 1;
  1897. term.esc = 0;
  1898. break;
  1899. case 'M': /* RI -- Reverse index */
  1900. if(term.c.y == term.top) {
  1901. tscrolldown(term.top, 1);
  1902. } else {
  1903. tmoveto(term.c.x, term.c.y-1);
  1904. }
  1905. term.esc = 0;
  1906. break;
  1907. case 'Z': /* DECID -- Identify Terminal */
  1908. ttywrite(VT102ID, sizeof(VT102ID) - 1);
  1909. term.esc = 0;
  1910. break;
  1911. case 'c': /* RIS -- Reset to inital state */
  1912. treset();
  1913. term.esc = 0;
  1914. xresettitle();
  1915. break;
  1916. case '=': /* DECPAM -- Application keypad */
  1917. term.mode |= MODE_APPKEYPAD;
  1918. term.esc = 0;
  1919. break;
  1920. case '>': /* DECPNM -- Normal keypad */
  1921. term.mode &= ~MODE_APPKEYPAD;
  1922. term.esc = 0;
  1923. break;
  1924. case '7': /* DECSC -- Save Cursor */
  1925. tcursor(CURSOR_SAVE);
  1926. term.esc = 0;
  1927. break;
  1928. case '8': /* DECRC -- Restore Cursor */
  1929. tcursor(CURSOR_LOAD);
  1930. term.esc = 0;
  1931. break;
  1932. case '\\': /* ST -- Stop */
  1933. term.esc = 0;
  1934. break;
  1935. default:
  1936. fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
  1937. (uchar) ascii, isprint(ascii)? ascii:'.');
  1938. term.esc = 0;
  1939. }
  1940. }
  1941. /*
  1942. * All characters which form part of a sequence are not
  1943. * printed
  1944. */
  1945. return;
  1946. }
  1947. /*
  1948. * Display control codes only if we are in graphic mode
  1949. */
  1950. if(control && !(term.c.attr.mode & ATTR_GFX))
  1951. return;
  1952. if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
  1953. sel.bx = -1;
  1954. if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
  1955. tnewline(1); /* always go to first col */
  1956. if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
  1957. memmove(&term.line[term.c.y][term.c.x+1],
  1958. &term.line[term.c.y][term.c.x],
  1959. (term.col - term.c.x - 1) * sizeof(Glyph));
  1960. }
  1961. tsetchar(c, &term.c.attr, term.c.x, term.c.y);
  1962. if(term.c.x+1 < term.col) {
  1963. tmoveto(term.c.x+1, term.c.y);
  1964. } else {
  1965. term.c.state |= CURSOR_WRAPNEXT;
  1966. }
  1967. }
  1968. int
  1969. tresize(int col, int row) {
  1970. int i, x;
  1971. int minrow = MIN(row, term.row);
  1972. int mincol = MIN(col, term.col);
  1973. int slide = term.c.y - row + 1;
  1974. bool *bp;
  1975. if(col < 1 || row < 1)
  1976. return 0;
  1977. /* free unneeded rows */
  1978. i = 0;
  1979. if(slide > 0) {
  1980. /*
  1981. * slide screen to keep cursor where we expect it -
  1982. * tscrollup would work here, but we can optimize to
  1983. * memmove because we're freeing the earlier lines
  1984. */
  1985. for(/* i = 0 */; i < slide; i++) {
  1986. free(term.line[i]);
  1987. free(term.alt[i]);
  1988. }
  1989. memmove(term.line, term.line + slide, row * sizeof(Line));
  1990. memmove(term.alt, term.alt + slide, row * sizeof(Line));
  1991. }
  1992. for(i += row; i < term.row; i++) {
  1993. free(term.line[i]);
  1994. free(term.alt[i]);
  1995. }
  1996. /* resize to new height */
  1997. term.line = xrealloc(term.line, row * sizeof(Line));
  1998. term.alt = xrealloc(term.alt, row * sizeof(Line));
  1999. term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
  2000. term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
  2001. /* resize each row to new width, zero-pad if needed */
  2002. for(i = 0; i < minrow; i++) {
  2003. term.dirty[i] = 1;
  2004. term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
  2005. term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
  2006. for(x = mincol; x < col; x++) {
  2007. term.line[i][x].state = 0;
  2008. term.alt[i][x].state = 0;
  2009. }
  2010. }
  2011. /* allocate any new rows */
  2012. for(/* i == minrow */; i < row; i++) {
  2013. term.dirty[i] = 1;
  2014. term.line[i] = xcalloc(col, sizeof(Glyph));
  2015. term.alt [i] = xcalloc(col, sizeof(Glyph));
  2016. }
  2017. if(col > term.col) {
  2018. bp = term.tabs + term.col;
  2019. memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
  2020. while(--bp > term.tabs && !*bp)
  2021. /* nothing */ ;
  2022. for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
  2023. *bp = 1;
  2024. }
  2025. /* update terminal size */
  2026. term.col = col;
  2027. term.row = row;
  2028. /* reset scrolling region */
  2029. tsetscroll(0, row-1);
  2030. /* make use of the LIMIT in tmoveto */
  2031. tmoveto(term.c.x, term.c.y);
  2032. return (slide > 0);
  2033. }
  2034. void
  2035. xresize(int col, int row) {
  2036. xw.tw = MAX(1, col * xw.cw);
  2037. xw.th = MAX(1, row * xw.ch);
  2038. if(!usedbe) {
  2039. XFreePixmap(xw.dpy, xw.buf);
  2040. xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
  2041. DefaultDepth(xw.dpy, xw.scr));
  2042. XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
  2043. XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
  2044. }
  2045. XftDrawChange(xw.draw, xw.buf);
  2046. }
  2047. void
  2048. xloadcols(void) {
  2049. int i, r, g, b;
  2050. XRenderColor color = { .alpha = 0xffff };
  2051. /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
  2052. for(i = 0; i < LEN(colorname); i++) {
  2053. if(!colorname[i])
  2054. continue;
  2055. if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
  2056. die("Could not allocate color '%s'\n", colorname[i]);
  2057. }
  2058. }
  2059. /* load colors [16-255] ; same colors as xterm */
  2060. for(i = 16, r = 0; r < 6; r++) {
  2061. for(g = 0; g < 6; g++) {
  2062. for(b = 0; b < 6; b++) {
  2063. color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
  2064. color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
  2065. color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
  2066. if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
  2067. die("Could not allocate color %d\n", i);
  2068. }
  2069. i++;
  2070. }
  2071. }
  2072. }
  2073. for(r = 0; r < 24; r++, i++) {
  2074. color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
  2075. if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
  2076. &dc.col[i])) {
  2077. die("Could not allocate color %d\n", i);
  2078. }
  2079. }
  2080. }
  2081. void
  2082. xtermclear(int col1, int row1, int col2, int row2) {
  2083. XftDrawRect(xw.draw,
  2084. &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
  2085. borderpx + col1 * xw.cw,
  2086. borderpx + row1 * xw.ch,
  2087. (col2-col1+1) * xw.cw,
  2088. (row2-row1+1) * xw.ch);
  2089. }
  2090. /*
  2091. * Absolute coordinates.
  2092. */
  2093. void
  2094. xclear(int x1, int y1, int x2, int y2) {
  2095. XftDrawRect(xw.draw,
  2096. &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
  2097. x1, y1, x2-x1, y2-y1);
  2098. }
  2099. void
  2100. xhints(void) {
  2101. XClassHint class = {opt_class ? opt_class : termname, termname};
  2102. XWMHints wm = {.flags = InputHint, .input = 1};
  2103. XSizeHints *sizeh = NULL;
  2104. sizeh = XAllocSizeHints();
  2105. if(xw.isfixed == False) {
  2106. sizeh->flags = PSize | PResizeInc | PBaseSize;
  2107. sizeh->height = xw.h;
  2108. sizeh->width = xw.w;
  2109. sizeh->height_inc = xw.ch;
  2110. sizeh->width_inc = xw.cw;
  2111. sizeh->base_height = 2 * borderpx;
  2112. sizeh->base_width = 2 * borderpx;
  2113. } else {
  2114. sizeh->flags = PMaxSize | PMinSize;
  2115. sizeh->min_width = sizeh->max_width = xw.fw;
  2116. sizeh->min_height = sizeh->max_height = xw.fh;
  2117. }
  2118. XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
  2119. XFree(sizeh);
  2120. }
  2121. int
  2122. xloadfont(Font *f, FcPattern *pattern) {
  2123. FcPattern *match;
  2124. FcResult result;
  2125. match = FcFontMatch(NULL, pattern, &result);
  2126. if(!match)
  2127. return 1;
  2128. if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
  2129. FcPatternDestroy(match);
  2130. return 1;
  2131. }
  2132. if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
  2133. FcPatternDestroy(match);
  2134. return 1;
  2135. }
  2136. f->pattern = FcPatternDuplicate(pattern);
  2137. f->ascent = f->match->ascent;
  2138. f->descent = f->match->descent;
  2139. f->lbearing = 0;
  2140. f->rbearing = f->match->max_advance_width;
  2141. f->height = f->match->height;
  2142. f->width = f->lbearing + f->rbearing;
  2143. return 0;
  2144. }
  2145. void
  2146. xloadfonts(char *fontstr, int fontsize) {
  2147. FcPattern *pattern;
  2148. FcResult result;
  2149. double fontval;
  2150. if(fontstr[0] == '-') {
  2151. pattern = XftXlfdParse(fontstr, False, False);
  2152. } else {
  2153. pattern = FcNameParse((FcChar8 *)fontstr);
  2154. }
  2155. if(!pattern)
  2156. die("st: can't open font %s\n", fontstr);
  2157. if(fontsize > 0) {
  2158. FcPatternDel(pattern, FC_PIXEL_SIZE);
  2159. FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
  2160. usedfontsize = fontsize;
  2161. } else {
  2162. result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
  2163. if(result == FcResultMatch) {
  2164. usedfontsize = (int)fontval;
  2165. } else {
  2166. /*
  2167. * Default font size is 12, if none given. This is to
  2168. * have a known usedfontsize value.
  2169. */
  2170. FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
  2171. usedfontsize = 12;
  2172. }
  2173. }
  2174. FcConfigSubstitute(0, pattern, FcMatchPattern);
  2175. FcDefaultSubstitute(pattern);
  2176. if(xloadfont(&dc.font, pattern))
  2177. die("st: can't open font %s\n", fontstr);
  2178. /* Setting character width and height. */
  2179. xw.cw = dc.font.width;
  2180. xw.ch = dc.font.height;
  2181. FcPatternDel(pattern, FC_SLANT);
  2182. FcPatternDel(pattern, FC_WEIGHT);
  2183. FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
  2184. FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
  2185. if(xloadfont(&dc.bfont, pattern))
  2186. die("st: can't open font %s\n", fontstr);
  2187. FcPatternDel(pattern, FC_SLANT);
  2188. FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
  2189. if(xloadfont(&dc.ibfont, pattern))
  2190. die("st: can't open font %s\n", fontstr);
  2191. FcPatternDel(pattern, FC_WEIGHT);
  2192. FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_MEDIUM);
  2193. if(xloadfont(&dc.ifont, pattern))
  2194. die("st: can't open font %s\n", fontstr);
  2195. FcPatternDestroy(pattern);
  2196. }
  2197. void
  2198. xunloadfonts(void) {
  2199. int i, ip;
  2200. /*
  2201. * Free the loaded fonts in the font cache. This is done backwards
  2202. * from the frccur.
  2203. */
  2204. for(i = 0, ip = frccur; i < frclen; i++, ip--) {
  2205. if(ip < 0)
  2206. ip = LEN(frc) - 1;
  2207. XftFontClose(xw.dpy, frc[ip].font);
  2208. }
  2209. frccur = -1;
  2210. frclen = 0;
  2211. XftFontClose(xw.dpy, dc.font.match);
  2212. FcPatternDestroy(dc.font.pattern);
  2213. FcFontSetDestroy(dc.font.set);
  2214. XftFontClose(xw.dpy, dc.bfont.match);
  2215. FcPatternDestroy(dc.bfont.pattern);
  2216. FcFontSetDestroy(dc.bfont.set);
  2217. XftFontClose(xw.dpy, dc.ifont.match);
  2218. FcPatternDestroy(dc.ifont.pattern);
  2219. FcFontSetDestroy(dc.ifont.set);
  2220. XftFontClose(xw.dpy, dc.ibfont.match);
  2221. FcPatternDestroy(dc.ibfont.pattern);
  2222. FcFontSetDestroy(dc.ibfont.set);
  2223. }
  2224. void
  2225. xzoom(const Arg *arg) {
  2226. xunloadfonts();
  2227. xloadfonts(usedfont, usedfontsize + arg->i);
  2228. cresize(0, 0);
  2229. redraw(0);
  2230. }
  2231. void
  2232. xinit(void) {
  2233. XSetWindowAttributes attrs;
  2234. XGCValues gcvalues;
  2235. Cursor cursor;
  2236. Window parent;
  2237. int sw, sh, major, minor;
  2238. if(!(xw.dpy = XOpenDisplay(NULL)))
  2239. die("Can't open display\n");
  2240. xw.scr = XDefaultScreen(xw.dpy);
  2241. xw.vis = XDefaultVisual(xw.dpy, xw.scr);
  2242. /* font */
  2243. if(!FcInit())
  2244. die("Could not init fontconfig.\n");
  2245. usedfont = (opt_font == NULL)? font : opt_font;
  2246. xloadfonts(usedfont, 0);
  2247. /* colors */
  2248. xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
  2249. xloadcols();
  2250. /* adjust fixed window geometry */
  2251. if(xw.isfixed) {
  2252. sw = DisplayWidth(xw.dpy, xw.scr);
  2253. sh = DisplayHeight(xw.dpy, xw.scr);
  2254. if(xw.fx < 0)
  2255. xw.fx = sw + xw.fx - xw.fw - 1;
  2256. if(xw.fy < 0)
  2257. xw.fy = sh + xw.fy - xw.fh - 1;
  2258. xw.h = xw.fh;
  2259. xw.w = xw.fw;
  2260. } else {
  2261. /* window - default size */
  2262. xw.h = 2 * borderpx + term.row * xw.ch;
  2263. xw.w = 2 * borderpx + term.col * xw.cw;
  2264. xw.fx = 0;
  2265. xw.fy = 0;
  2266. }
  2267. /* Events */
  2268. attrs.background_pixel = dc.col[defaultbg].pixel;
  2269. attrs.border_pixel = dc.col[defaultbg].pixel;
  2270. attrs.bit_gravity = NorthWestGravity;
  2271. attrs.event_mask = FocusChangeMask | KeyPressMask
  2272. | ExposureMask | VisibilityChangeMask | StructureNotifyMask
  2273. | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
  2274. attrs.colormap = xw.cmap;
  2275. parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
  2276. XRootWindow(xw.dpy, xw.scr);
  2277. xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
  2278. xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
  2279. xw.vis,
  2280. CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
  2281. | CWColormap,
  2282. &attrs);
  2283. /* double buffering */
  2284. /*
  2285. if(XdbeQueryExtension(xw.dpy, &major, &minor)) {
  2286. xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win,
  2287. XdbeBackground);
  2288. usedbe = True;
  2289. } else {
  2290. */
  2291. memset(&gcvalues, 0, sizeof(gcvalues));
  2292. gcvalues.graphics_exposures = False;
  2293. dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
  2294. &gcvalues);
  2295. xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
  2296. DefaultDepth(xw.dpy, xw.scr));
  2297. XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
  2298. XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
  2299. //xw.buf = xw.win;
  2300. /*
  2301. }
  2302. */
  2303. /* Xft rendering context */
  2304. xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
  2305. /* input methods */
  2306. if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
  2307. XSetLocaleModifiers("@im=local");
  2308. if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
  2309. XSetLocaleModifiers("@im=");
  2310. if((xw.xim = XOpenIM(xw.dpy,
  2311. NULL, NULL, NULL)) == NULL) {
  2312. die("XOpenIM failed. Could not open input"
  2313. " device.\n");
  2314. }
  2315. }
  2316. }
  2317. xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
  2318. | XIMStatusNothing, XNClientWindow, xw.win,
  2319. XNFocusWindow, xw.win, NULL);
  2320. if(xw.xic == NULL)
  2321. die("XCreateIC failed. Could not obtain input method.\n");
  2322. /* white cursor, black outline */
  2323. cursor = XCreateFontCursor(xw.dpy, XC_xterm);
  2324. XDefineCursor(xw.dpy, xw.win, cursor);
  2325. XRecolorCursor(xw.dpy, cursor,
  2326. &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
  2327. &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
  2328. xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
  2329. xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
  2330. XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
  2331. xresettitle();
  2332. XMapWindow(xw.dpy, xw.win);
  2333. xhints();
  2334. XSync(xw.dpy, 0);
  2335. }
  2336. void
  2337. xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
  2338. int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
  2339. width = charlen * xw.cw, xp, i;
  2340. int frp, frcflags;
  2341. int u8fl, u8fblen, u8cblen, doesexist;
  2342. char *u8c, *u8fs;
  2343. long u8char;
  2344. Font *font = &dc.font;
  2345. FcResult fcres;
  2346. FcPattern *fcpattern, *fontpattern;
  2347. FcFontSet *fcsets[] = { NULL };
  2348. FcCharSet *fccharset;
  2349. Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
  2350. *temp, revfg, revbg;
  2351. XRenderColor colfg, colbg;
  2352. frcflags = FRC_NORMAL;
  2353. if(base.mode & ATTR_BOLD) {
  2354. if(BETWEEN(base.fg, 0, 7)) {
  2355. /* basic system colors */
  2356. fg = &dc.col[base.fg + 8];
  2357. } else if(BETWEEN(base.fg, 16, 195)) {
  2358. /* 256 colors */
  2359. fg = &dc.col[base.fg + 36];
  2360. } else if(BETWEEN(base.fg, 232, 251)) {
  2361. /* greyscale */
  2362. fg = &dc.col[base.fg + 4];
  2363. }
  2364. /*
  2365. * Those ranges will not be brightened:
  2366. * 8 - 15 – bright system colors
  2367. * 196 - 231 – highest 256 color cube
  2368. * 252 - 255 – brightest colors in greyscale
  2369. */
  2370. font = &dc.bfont;
  2371. frcflags = FRC_BOLD;
  2372. }
  2373. if(base.mode & ATTR_ITALIC) {
  2374. font = &dc.ifont;
  2375. frcflags = FRC_ITALIC;
  2376. }
  2377. if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
  2378. font = &dc.ibfont;
  2379. frcflags = FRC_ITALICBOLD;
  2380. }
  2381. if(IS_SET(MODE_REVERSE)) {
  2382. if(fg == &dc.col[defaultfg]) {
  2383. fg = &dc.col[defaultbg];
  2384. } else {
  2385. colfg.red = ~fg->color.red;
  2386. colfg.green = ~fg->color.green;
  2387. colfg.blue = ~fg->color.blue;
  2388. colfg.alpha = fg->color.alpha;
  2389. XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
  2390. fg = &revfg;
  2391. }
  2392. if(bg == &dc.col[defaultbg]) {
  2393. bg = &dc.col[defaultfg];
  2394. } else {
  2395. colbg.red = ~bg->color.red;
  2396. colbg.green = ~bg->color.green;
  2397. colbg.blue = ~bg->color.blue;
  2398. colbg.alpha = bg->color.alpha;
  2399. XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
  2400. bg = &revbg;
  2401. }
  2402. }
  2403. if(base.mode & ATTR_REVERSE) {
  2404. temp = fg;
  2405. fg = bg;
  2406. bg = temp;
  2407. }
  2408. /* Intelligent cleaning up of the borders. */
  2409. if(x == 0) {
  2410. xclear(0, (y == 0)? 0 : winy, borderpx,
  2411. winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
  2412. }
  2413. if(x + charlen >= term.col) {
  2414. xclear(winx + width, (y == 0)? 0 : winy, xw.w,
  2415. ((y >= term.row-1)? xw.h : (winy + xw.ch)));
  2416. }
  2417. if(y == 0)
  2418. xclear(winx, 0, winx + width, borderpx);
  2419. if(y == term.row-1)
  2420. xclear(winx, winy + xw.ch, winx + width, xw.h);
  2421. /* Clean up the region we want to draw to. */
  2422. XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
  2423. fcsets[0] = font->set;
  2424. for(xp = winx; bytelen > 0;) {
  2425. /*
  2426. * Search for the range in the to be printed string of glyphs
  2427. * that are in the main font. Then print that range. If
  2428. * some glyph is found that is not in the font, do the
  2429. * fallback dance.
  2430. */
  2431. u8fs = s;
  2432. u8fblen = 0;
  2433. u8fl = 0;
  2434. for(;;) {
  2435. u8c = s;
  2436. u8cblen = utf8decode(s, &u8char);
  2437. s += u8cblen;
  2438. bytelen -= u8cblen;
  2439. doesexist = XftCharIndex(xw.dpy, font->match, u8char);
  2440. if(!doesexist || bytelen <= 0) {
  2441. if(bytelen <= 0) {
  2442. if(doesexist) {
  2443. u8fl++;
  2444. u8fblen += u8cblen;
  2445. }
  2446. }
  2447. if(u8fl > 0) {
  2448. XftDrawStringUtf8(xw.draw, fg,
  2449. font->match, xp,
  2450. winy + font->ascent,
  2451. (FcChar8 *)u8fs,
  2452. u8fblen);
  2453. xp += font->width * u8fl;
  2454. }
  2455. break;
  2456. }
  2457. u8fl++;
  2458. u8fblen += u8cblen;
  2459. }
  2460. if(doesexist)
  2461. break;
  2462. frp = frccur;
  2463. /* Search the font cache. */
  2464. for(i = 0; i < frclen; i++, frp--) {
  2465. if(frp <= 0)
  2466. frp = LEN(frc) - 1;
  2467. if(frc[frp].c == u8char
  2468. && frc[frp].flags == frcflags) {
  2469. break;
  2470. }
  2471. }
  2472. /* Nothing was found. */
  2473. if(i >= frclen) {
  2474. /*
  2475. * Nothing was found in the cache. Now use
  2476. * some dozen of Fontconfig calls to get the
  2477. * font for one single character.
  2478. */
  2479. fcpattern = FcPatternDuplicate(font->pattern);
  2480. fccharset = FcCharSetCreate();
  2481. FcCharSetAddChar(fccharset, u8char);
  2482. FcPatternAddCharSet(fcpattern, FC_CHARSET,
  2483. fccharset);
  2484. FcPatternAddBool(fcpattern, FC_SCALABLE,
  2485. FcTrue);
  2486. FcConfigSubstitute(0, fcpattern,
  2487. FcMatchPattern);
  2488. FcDefaultSubstitute(fcpattern);
  2489. fontpattern = FcFontSetMatch(0, fcsets,
  2490. FcTrue, fcpattern, &fcres);
  2491. /*
  2492. * Overwrite or create the new cache entry
  2493. * entry.
  2494. */
  2495. frccur++;
  2496. frclen++;
  2497. if(frccur >= LEN(frc))
  2498. frccur = 0;
  2499. if(frclen > LEN(frc)) {
  2500. frclen = LEN(frc);
  2501. XftFontClose(xw.dpy, frc[frccur].font);
  2502. }
  2503. frc[frccur].font = XftFontOpenPattern(xw.dpy,
  2504. fontpattern);
  2505. frc[frccur].c = u8char;
  2506. frc[frccur].flags = frcflags;
  2507. FcPatternDestroy(fcpattern);
  2508. FcCharSetDestroy(fccharset);
  2509. frp = frccur;
  2510. }
  2511. XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
  2512. xp, winy + frc[frp].font->ascent,
  2513. (FcChar8 *)u8c, u8cblen);
  2514. xp += font->width;
  2515. }
  2516. /*
  2517. XftDrawStringUtf8(xw.draw, fg, font->set, winx,
  2518. winy + font->ascent, (FcChar8 *)s, bytelen);
  2519. */
  2520. if(base.mode & ATTR_UNDERLINE) {
  2521. XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
  2522. width, 1);
  2523. }
  2524. }
  2525. void
  2526. xdrawcursor(void) {
  2527. static int oldx = 0, oldy = 0;
  2528. int sl;
  2529. Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs, 0};
  2530. LIMIT(oldx, 0, term.col-1);
  2531. LIMIT(oldy, 0, term.row-1);
  2532. if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
  2533. memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
  2534. /* remove the old cursor */
  2535. if(term.line[oldy][oldx].state & GLYPH_SET) {
  2536. sl = utf8size(term.line[oldy][oldx].c);
  2537. xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
  2538. oldy, 1, sl);
  2539. } else {
  2540. xtermclear(oldx, oldy, oldx, oldy);
  2541. }
  2542. /* draw the new one */
  2543. if(!(IS_SET(MODE_HIDE))) {
  2544. if(!(xw.state & WIN_FOCUSED))
  2545. g.bg = defaultucs;
  2546. if(IS_SET(MODE_REVERSE))
  2547. g.mode |= ATTR_REVERSE, g.fg = defaultcs, g.bg = defaultfg;
  2548. sl = utf8size(g.c);
  2549. xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
  2550. oldx = term.c.x, oldy = term.c.y;
  2551. }
  2552. }
  2553. void
  2554. xresettitle(void) {
  2555. XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
  2556. }
  2557. void
  2558. redraw(int timeout) {
  2559. struct timespec tv = {0, timeout * 1000};
  2560. tfulldirt();
  2561. draw();
  2562. if(timeout > 0) {
  2563. nanosleep(&tv, NULL);
  2564. XSync(xw.dpy, False); /* necessary for a good tput flash */
  2565. }
  2566. }
  2567. void
  2568. draw(void) {
  2569. XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
  2570. drawregion(0, 0, term.col, term.row);
  2571. if(usedbe) {
  2572. XdbeSwapBuffers(xw.dpy, swpinfo, 1);
  2573. } else {
  2574. XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
  2575. xw.h, 0, 0);
  2576. XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg].pixel);
  2577. }
  2578. }
  2579. void
  2580. drawregion(int x1, int y1, int x2, int y2) {
  2581. int ic, ib, x, y, ox, sl;
  2582. Glyph base, new;
  2583. char buf[DRAW_BUF_SIZ];
  2584. bool ena_sel = sel.bx != -1;
  2585. if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
  2586. ena_sel = 0;
  2587. if(!(xw.state & WIN_VISIBLE))
  2588. return;
  2589. for(y = y1; y < y2; y++) {
  2590. if(!term.dirty[y])
  2591. continue;
  2592. xtermclear(0, y, term.col, y);
  2593. term.dirty[y] = 0;
  2594. base = term.line[y][0];
  2595. ic = ib = ox = 0;
  2596. for(x = x1; x < x2; x++) {
  2597. new = term.line[y][x];
  2598. if(ena_sel && *(new.c) && selected(x, y))
  2599. new.mode ^= ATTR_REVERSE;
  2600. if(ib > 0 && (!(new.state & GLYPH_SET)
  2601. || ATTRCMP(base, new)
  2602. || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
  2603. xdraws(buf, base, ox, y, ic, ib);
  2604. ic = ib = 0;
  2605. }
  2606. if(new.state & GLYPH_SET) {
  2607. if(ib == 0) {
  2608. ox = x;
  2609. base = new;
  2610. }
  2611. sl = utf8size(new.c);
  2612. memcpy(buf+ib, new.c, sl);
  2613. ib += sl;
  2614. ++ic;
  2615. }
  2616. }
  2617. if(ib > 0)
  2618. xdraws(buf, base, ox, y, ic, ib);
  2619. }
  2620. xdrawcursor();
  2621. }
  2622. void
  2623. expose(XEvent *ev) {
  2624. XExposeEvent *e = &ev->xexpose;
  2625. if(xw.state & WIN_REDRAW) {
  2626. if(!e->count)
  2627. xw.state &= ~WIN_REDRAW;
  2628. }
  2629. redraw(0);
  2630. }
  2631. void
  2632. visibility(XEvent *ev) {
  2633. XVisibilityEvent *e = &ev->xvisibility;
  2634. if(e->state == VisibilityFullyObscured) {
  2635. xw.state &= ~WIN_VISIBLE;
  2636. } else if(!(xw.state & WIN_VISIBLE)) {
  2637. /* need a full redraw for next Expose, not just a buf copy */
  2638. xw.state |= WIN_VISIBLE | WIN_REDRAW;
  2639. }
  2640. }
  2641. void
  2642. unmap(XEvent *ev) {
  2643. xw.state &= ~WIN_VISIBLE;
  2644. }
  2645. void
  2646. xseturgency(int add) {
  2647. XWMHints *h = XGetWMHints(xw.dpy, xw.win);
  2648. h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
  2649. XSetWMHints(xw.dpy, xw.win, h);
  2650. XFree(h);
  2651. }
  2652. void
  2653. focus(XEvent *ev) {
  2654. XFocusChangeEvent *e = &ev->xfocus;
  2655. if(e->mode == NotifyGrab)
  2656. return;
  2657. if(ev->type == FocusIn) {
  2658. XSetICFocus(xw.xic);
  2659. xw.state |= WIN_FOCUSED;
  2660. xseturgency(0);
  2661. } else {
  2662. XUnsetICFocus(xw.xic);
  2663. xw.state &= ~WIN_FOCUSED;
  2664. }
  2665. }
  2666. inline bool
  2667. match(uint mask, uint state) {
  2668. state &= ~(ignoremod);
  2669. if(mask == XK_NO_MOD && state)
  2670. return false;
  2671. if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
  2672. return false;
  2673. if((state & mask) != state)
  2674. return false;
  2675. return true;
  2676. }
  2677. void
  2678. numlock(const Arg *dummy) {
  2679. term.numlock ^= 1;
  2680. }
  2681. char*
  2682. kmap(KeySym k, uint state) {
  2683. uint mask;
  2684. Key *kp;
  2685. int i;
  2686. /* Check for mapped keys out of X11 function keys. */
  2687. for(i = 0; i < LEN(mappedkeys); i++) {
  2688. if(mappedkeys[i] == k)
  2689. break;
  2690. }
  2691. if(i == LEN(mappedkeys)) {
  2692. if((k & 0xFFFF) < 0xFD00)
  2693. return NULL;
  2694. }
  2695. for(kp = key; kp < key + LEN(key); kp++) {
  2696. mask = kp->mask;
  2697. if(kp->k != k)
  2698. continue;
  2699. if(!match(mask, state))
  2700. continue;
  2701. if(kp->appkey > 0) {
  2702. if(!IS_SET(MODE_APPKEYPAD))
  2703. continue;
  2704. if(term.numlock && kp->appkey == 2)
  2705. continue;
  2706. } else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
  2707. continue;
  2708. }
  2709. if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
  2710. (kp->appcursor > 0
  2711. && !IS_SET(MODE_APPCURSOR))) {
  2712. continue;
  2713. }
  2714. if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
  2715. (kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
  2716. continue;
  2717. }
  2718. return kp->s;
  2719. }
  2720. return NULL;
  2721. }
  2722. void
  2723. kpress(XEvent *ev) {
  2724. XKeyEvent *e = &ev->xkey;
  2725. KeySym ksym;
  2726. char xstr[31], buf[32], *customkey, *cp = buf;
  2727. int len;
  2728. Status status;
  2729. Shortcut *bp;
  2730. if(IS_SET(MODE_KBDLOCK))
  2731. return;
  2732. len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
  2733. e->state &= ~Mod2Mask;
  2734. /* 1. shortcuts */
  2735. for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
  2736. if(ksym == bp->keysym && match(bp->mod, e->state)) {
  2737. bp->func(&(bp->arg));
  2738. return;
  2739. }
  2740. }
  2741. /* 2. custom keys from config.h */
  2742. if((customkey = kmap(ksym, e->state))) {
  2743. len = strlen(customkey);
  2744. memcpy(buf, customkey, len);
  2745. /* 2. hardcoded (overrides X lookup) */
  2746. } else {
  2747. if(len == 0)
  2748. return;
  2749. if(len == 1 && e->state & Mod1Mask)
  2750. *cp++ = '\033';
  2751. memcpy(cp, xstr, len);
  2752. len = cp - buf + len;
  2753. }
  2754. ttywrite(buf, len);
  2755. if(IS_SET(MODE_ECHO))
  2756. techo(buf, len);
  2757. }
  2758. void
  2759. cmessage(XEvent *e) {
  2760. /*
  2761. * See xembed specs
  2762. * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
  2763. */
  2764. if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
  2765. if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
  2766. xw.state |= WIN_FOCUSED;
  2767. xseturgency(0);
  2768. } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
  2769. xw.state &= ~WIN_FOCUSED;
  2770. }
  2771. } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
  2772. /* Send SIGHUP to shell */
  2773. kill(pid, SIGHUP);
  2774. exit(EXIT_SUCCESS);
  2775. }
  2776. }
  2777. void
  2778. cresize(int width, int height) {
  2779. int col, row;
  2780. if(width != 0)
  2781. xw.w = width;
  2782. if(height != 0)
  2783. xw.h = height;
  2784. col = (xw.w - 2 * borderpx) / xw.cw;
  2785. row = (xw.h - 2 * borderpx) / xw.ch;
  2786. tresize(col, row);
  2787. xresize(col, row);
  2788. ttyresize();
  2789. }
  2790. void
  2791. resize(XEvent *e) {
  2792. if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
  2793. return;
  2794. cresize(e->xconfigure.width, e->xconfigure.height);
  2795. }
  2796. void
  2797. run(void) {
  2798. XEvent ev;
  2799. fd_set rfd;
  2800. int xfd = XConnectionNumber(xw.dpy), xev;
  2801. struct timeval drawtimeout, *tv = NULL, now, last;
  2802. gettimeofday(&last, NULL);
  2803. for(xev = actionfps;;) {
  2804. FD_ZERO(&rfd);
  2805. FD_SET(cmdfd, &rfd);
  2806. FD_SET(xfd, &rfd);
  2807. if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
  2808. if(errno == EINTR)
  2809. continue;
  2810. die("select failed: %s\n", SERRNO);
  2811. }
  2812. gettimeofday(&now, NULL);
  2813. drawtimeout.tv_sec = 0;
  2814. drawtimeout.tv_usec = (1000/xfps) * 1000;
  2815. tv = &drawtimeout;
  2816. if(FD_ISSET(cmdfd, &rfd))
  2817. ttyread();
  2818. if(FD_ISSET(xfd, &rfd))
  2819. xev = actionfps;
  2820. if(TIMEDIFF(now, last) > \
  2821. (xev ? (1000/xfps) : (1000/actionfps))) {
  2822. while(XPending(xw.dpy)) {
  2823. XNextEvent(xw.dpy, &ev);
  2824. if(XFilterEvent(&ev, None))
  2825. continue;
  2826. if(handler[ev.type])
  2827. (handler[ev.type])(&ev);
  2828. }
  2829. draw();
  2830. XFlush(xw.dpy);
  2831. last = now;
  2832. if(xev && !FD_ISSET(xfd, &rfd))
  2833. xev--;
  2834. if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
  2835. tv = NULL;
  2836. }
  2837. }
  2838. }
  2839. int
  2840. main(int argc, char *argv[]) {
  2841. int i, bitm, xr, yr;
  2842. uint wr, hr;
  2843. xw.fw = xw.fh = xw.fx = xw.fy = 0;
  2844. xw.isfixed = False;
  2845. for(i = 1; i < argc; i++) {
  2846. switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
  2847. case 'c':
  2848. if(++i < argc)
  2849. opt_class = argv[i];
  2850. break;
  2851. case 'e':
  2852. /* eat all remaining arguments */
  2853. if(++i < argc)
  2854. opt_cmd = &argv[i];
  2855. goto run;
  2856. case 'f':
  2857. if(++i < argc)
  2858. opt_font = argv[i];
  2859. break;
  2860. case 'g':
  2861. if(++i >= argc)
  2862. break;
  2863. bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
  2864. if(bitm & XValue)
  2865. xw.fx = xr;
  2866. if(bitm & YValue)
  2867. xw.fy = yr;
  2868. if(bitm & WidthValue)
  2869. xw.fw = (int)wr;
  2870. if(bitm & HeightValue)
  2871. xw.fh = (int)hr;
  2872. if(bitm & XNegative && xw.fx == 0)
  2873. xw.fx = -1;
  2874. if(bitm & XNegative && xw.fy == 0)
  2875. xw.fy = -1;
  2876. if(xw.fh != 0 && xw.fw != 0)
  2877. xw.isfixed = True;
  2878. break;
  2879. case 'o':
  2880. if(++i < argc)
  2881. opt_io = argv[i];
  2882. break;
  2883. case 't':
  2884. if(++i < argc)
  2885. opt_title = argv[i];
  2886. break;
  2887. case 'v':
  2888. default:
  2889. die(USAGE);
  2890. case 'w':
  2891. if(++i < argc)
  2892. opt_embed = argv[i];
  2893. break;
  2894. }
  2895. }
  2896. run:
  2897. setlocale(LC_CTYPE, "");
  2898. XSetLocaleModifiers("");
  2899. tnew(80, 24);
  2900. xinit();
  2901. ttynew();
  2902. selinit();
  2903. run();
  2904. return 0;
  2905. }