st.c 47 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 <stdarg.h>
  9. #include <stdio.h>
  10. #include <stdlib.h>
  11. #include <string.h>
  12. #include <signal.h>
  13. #include <sys/ioctl.h>
  14. #include <sys/select.h>
  15. #include <sys/stat.h>
  16. #include <sys/types.h>
  17. #include <sys/wait.h>
  18. #include <unistd.h>
  19. #include <X11/Xatom.h>
  20. #include <X11/Xlib.h>
  21. #include <X11/Xutil.h>
  22. #include <X11/cursorfont.h>
  23. #include <X11/keysym.h>
  24. #include <sys/time.h>
  25. #include <time.h>
  26. #if defined(__linux)
  27. #include <pty.h>
  28. #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  29. #include <util.h>
  30. #elif defined(__FreeBSD__) || defined(__DragonFly__)
  31. #include <libutil.h>
  32. #endif
  33. #define USAGE \
  34. "st " VERSION " (c) 2010-2011 st engineers\n" \
  35. "usage: st [-t title] [-c class] [-w windowid] [-v] [-e command...]\n"
  36. /* XEMBED messages */
  37. #define XEMBED_FOCUS_IN 4
  38. #define XEMBED_FOCUS_OUT 5
  39. /* Arbitrary sizes */
  40. #define ESC_TITLE_SIZ 256
  41. #define ESC_BUF_SIZ 256
  42. #define ESC_ARG_SIZ 16
  43. #define DRAW_BUF_SIZ 1024
  44. #define UTF_SIZ 4
  45. #define XK_NO_MOD UINT_MAX
  46. #define XK_ANY_MOD 0
  47. #define SERRNO strerror(errno)
  48. #define MIN(a, b) ((a) < (b) ? (a) : (b))
  49. #define MAX(a, b) ((a) < (b) ? (b) : (a))
  50. #define LEN(a) (sizeof(a) / sizeof(a[0]))
  51. #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
  52. #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
  53. #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  54. #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  55. #define IS_SET(flag) (term.mode & (flag))
  56. #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
  57. #define X2COL(x) (((x) - BORDER)/xw.cw)
  58. #define Y2ROW(y) (((y) - BORDER)/xw.ch)
  59. /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
  60. enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
  61. enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
  62. CURSOR_SAVE, CURSOR_LOAD };
  63. enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
  64. enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
  65. enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
  66. MODE_CRLF=16, MODE_MOUSEBTN=32, MODE_MOUSEMOTION=64, MODE_MOUSE=32|64, MODE_REVERSE=128 };
  67. enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
  68. enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
  69. #undef B0
  70. enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
  71. typedef struct {
  72. char c[UTF_SIZ]; /* character code */
  73. char mode; /* attribute flags */
  74. int fg; /* foreground */
  75. int bg; /* background */
  76. char state; /* state flags */
  77. } Glyph;
  78. typedef Glyph* Line;
  79. typedef struct {
  80. Glyph attr; /* current char attributes */
  81. int x;
  82. int y;
  83. char state;
  84. } TCursor;
  85. /* CSI Escape sequence structs */
  86. /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  87. typedef struct {
  88. char buf[ESC_BUF_SIZ]; /* raw string */
  89. int len; /* raw string length */
  90. char priv;
  91. int arg[ESC_ARG_SIZ];
  92. int narg; /* nb of args */
  93. char mode;
  94. } CSIEscape;
  95. /* Internal representation of the screen */
  96. typedef struct {
  97. int row; /* nb row */
  98. int col; /* nb col */
  99. Line* line; /* screen */
  100. Line* alt; /* alternate screen */
  101. char* dirty; /* dirtyness of lines */
  102. TCursor c; /* cursor */
  103. int top; /* top scroll limit */
  104. int bot; /* bottom scroll limit */
  105. int mode; /* terminal mode flags */
  106. int esc; /* escape state flags */
  107. char title[ESC_TITLE_SIZ];
  108. int titlelen;
  109. } Term;
  110. /* Purely graphic info */
  111. typedef struct {
  112. Display* dpy;
  113. Colormap cmap;
  114. Window win;
  115. Pixmap buf;
  116. Atom xembed;
  117. XIM xim;
  118. XIC xic;
  119. int scr;
  120. int w; /* window width */
  121. int h; /* window height */
  122. int bufw; /* pixmap width */
  123. int bufh; /* pixmap height */
  124. int ch; /* char height */
  125. int cw; /* char width */
  126. char state; /* focus, redraw, visible */
  127. } XWindow;
  128. typedef struct {
  129. KeySym k;
  130. unsigned int mask;
  131. char s[ESC_BUF_SIZ];
  132. } Key;
  133. /* Drawing Context */
  134. typedef struct {
  135. unsigned long col[256];
  136. GC gc;
  137. struct {
  138. int ascent;
  139. int descent;
  140. short lbearing;
  141. short rbearing;
  142. XFontSet set;
  143. } font, bfont;
  144. } DC;
  145. /* TODO: use better name for vars... */
  146. typedef struct {
  147. int mode;
  148. int bx, by;
  149. int ex, ey;
  150. struct {int x, y;} b, e;
  151. char *clip;
  152. Atom xtarget;
  153. struct timeval tclick1;
  154. struct timeval tclick2;
  155. } Selection;
  156. #include "config.h"
  157. static void die(const char*, ...);
  158. static void draw(void);
  159. static void drawregion(int, int, int, int);
  160. static void execsh(void);
  161. static void sigchld(int);
  162. static void run(void);
  163. static void csidump(void);
  164. static void csihandle(void);
  165. static void csiparse(void);
  166. static void csireset(void);
  167. static void tclearregion(int, int, int, int);
  168. static void tcursor(int);
  169. static void tdeletechar(int);
  170. static void tdeleteline(int);
  171. static void tinsertblank(int);
  172. static void tinsertblankline(int);
  173. static void tmoveto(int, int);
  174. static void tnew(int, int);
  175. static void tnewline(int);
  176. static void tputtab(void);
  177. static void tputc(char*);
  178. static void treset(void);
  179. static int tresize(int, int);
  180. static void tscrollup(int, int);
  181. static void tscrolldown(int, int);
  182. static void tsetattr(int*, int);
  183. static void tsetchar(char*);
  184. static void tsetscroll(int, int);
  185. static void tswapscreen(void);
  186. static void tfulldirt(void);
  187. static void ttynew(void);
  188. static void ttyread(void);
  189. static void ttyresize(int, int);
  190. static void ttywrite(const char *, size_t);
  191. static void xdraws(char *, Glyph, int, int, int, int);
  192. static void xhints(void);
  193. static void xclear(int, int, int, int);
  194. static void xdrawcursor(void);
  195. static void xinit(void);
  196. static void xloadcols(void);
  197. static void xseturgency(int);
  198. static void xsetsel(char*);
  199. static void xresize(int, int);
  200. static void expose(XEvent *);
  201. static void visibility(XEvent *);
  202. static void unmap(XEvent *);
  203. static char* kmap(KeySym, unsigned int state);
  204. static void kpress(XEvent *);
  205. static void cmessage(XEvent *);
  206. static void resize(XEvent *);
  207. static void focus(XEvent *);
  208. static void brelease(XEvent *);
  209. static void bpress(XEvent *);
  210. static void bmotion(XEvent *);
  211. static void selnotify(XEvent *);
  212. static void selrequest(XEvent *);
  213. static void selinit(void);
  214. static inline int selected(int, int);
  215. static void selcopy(void);
  216. static void selpaste();
  217. static void selscroll(int, int);
  218. static int utf8decode(char *, long *);
  219. static int utf8encode(long *, char *);
  220. static int utf8size(char *);
  221. static int isfullutf8(char *, int);
  222. static void (*handler[LASTEvent])(XEvent *) = {
  223. [KeyPress] = kpress,
  224. [ClientMessage] = cmessage,
  225. [ConfigureNotify] = resize,
  226. [VisibilityNotify] = visibility,
  227. [UnmapNotify] = unmap,
  228. [Expose] = expose,
  229. [FocusIn] = focus,
  230. [FocusOut] = focus,
  231. [MotionNotify] = bmotion,
  232. [ButtonPress] = bpress,
  233. [ButtonRelease] = brelease,
  234. [SelectionNotify] = selnotify,
  235. [SelectionRequest] = selrequest,
  236. };
  237. /* Globals */
  238. static DC dc;
  239. static XWindow xw;
  240. static Term term;
  241. static CSIEscape escseq;
  242. static int cmdfd;
  243. static pid_t pid;
  244. static Selection sel;
  245. static char **opt_cmd = NULL;
  246. static char *opt_title = NULL;
  247. static char *opt_embed = NULL;
  248. static char *opt_class = NULL;
  249. int
  250. utf8decode(char *s, long *u) {
  251. unsigned char c;
  252. int i, n, rtn;
  253. rtn = 1;
  254. c = *s;
  255. if(~c&B7) { /* 0xxxxxxx */
  256. *u = c;
  257. return rtn;
  258. } else if((c&(B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
  259. *u = c&(B4|B3|B2|B1|B0);
  260. n = 1;
  261. } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
  262. *u = c&(B3|B2|B1|B0);
  263. n = 2;
  264. } else if((c&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
  265. *u = c&(B2|B1|B0);
  266. n = 3;
  267. } else
  268. goto invalid;
  269. for(i=n,++s; i>0; --i,++rtn,++s) {
  270. c = *s;
  271. if((c&(B7|B6)) != B7) /* 10xxxxxx */
  272. goto invalid;
  273. *u <<= 6;
  274. *u |= c&(B5|B4|B3|B2|B1|B0);
  275. }
  276. if((n == 1 && *u < 0x80) ||
  277. (n == 2 && *u < 0x800) ||
  278. (n == 3 && *u < 0x10000) ||
  279. (*u >= 0xD800 && *u <= 0xDFFF))
  280. goto invalid;
  281. return rtn;
  282. invalid:
  283. *u = 0xFFFD;
  284. return rtn;
  285. }
  286. int
  287. utf8encode(long *u, char *s) {
  288. unsigned char *sp;
  289. unsigned long uc;
  290. int i, n;
  291. sp = (unsigned char*) s;
  292. uc = *u;
  293. if(uc < 0x80) {
  294. *sp = uc; /* 0xxxxxxx */
  295. return 1;
  296. } else if(*u < 0x800) {
  297. *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
  298. n = 1;
  299. } else if(uc < 0x10000) {
  300. *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
  301. n = 2;
  302. } else if(uc <= 0x10FFFF) {
  303. *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
  304. n = 3;
  305. } else {
  306. goto invalid;
  307. }
  308. for(i=n,++sp; i>0; --i,++sp)
  309. *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
  310. return n+1;
  311. invalid:
  312. /* U+FFFD */
  313. *s++ = '\xEF';
  314. *s++ = '\xBF';
  315. *s = '\xBD';
  316. return 3;
  317. }
  318. /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
  319. UTF-8 otherwise return 0 */
  320. int
  321. isfullutf8(char *s, int b) {
  322. unsigned char *c1, *c2, *c3;
  323. c1 = (unsigned char *) s;
  324. c2 = (unsigned char *) ++s;
  325. c3 = (unsigned char *) ++s;
  326. if(b < 1)
  327. return 0;
  328. else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
  329. return 0;
  330. else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
  331. ((b == 1) ||
  332. ((b == 2) && (*c2&(B7|B6)) == B7)))
  333. return 0;
  334. else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
  335. ((b == 1) ||
  336. ((b == 2) && (*c2&(B7|B6)) == B7) ||
  337. ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
  338. return 0;
  339. else
  340. return 1;
  341. }
  342. int
  343. utf8size(char *s) {
  344. unsigned char c = *s;
  345. if(~c&B7)
  346. return 1;
  347. else if((c&(B7|B6|B5)) == (B7|B6))
  348. return 2;
  349. else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
  350. return 3;
  351. else
  352. return 4;
  353. }
  354. void
  355. selinit(void) {
  356. sel.tclick1.tv_sec = 0;
  357. sel.tclick1.tv_usec = 0;
  358. sel.mode = 0;
  359. sel.bx = -1;
  360. sel.clip = NULL;
  361. sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
  362. if(sel.xtarget == None)
  363. sel.xtarget = XA_STRING;
  364. }
  365. static inline int
  366. selected(int x, int y) {
  367. if(sel.ey == y && sel.by == y) {
  368. int bx = MIN(sel.bx, sel.ex);
  369. int ex = MAX(sel.bx, sel.ex);
  370. return BETWEEN(x, bx, ex);
  371. }
  372. return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
  373. || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
  374. }
  375. void
  376. getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
  377. if(b)
  378. *b = e->xbutton.button;
  379. *x = X2COL(e->xbutton.x);
  380. *y = Y2ROW(e->xbutton.y);
  381. sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
  382. sel.b.y = MIN(sel.by, sel.ey);
  383. sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
  384. sel.e.y = MAX(sel.by, sel.ey);
  385. }
  386. void
  387. mousereport(XEvent *e) {
  388. int x = X2COL(e->xbutton.x);
  389. int y = Y2ROW(e->xbutton.y);
  390. int button = e->xbutton.button;
  391. int state = e->xbutton.state;
  392. char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
  393. static int ob, ox, oy;
  394. /* from urxvt */
  395. if(e->xbutton.type == MotionNotify) {
  396. if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
  397. return;
  398. button = ob + 32;
  399. ox = x, oy = y;
  400. } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
  401. button = 3;
  402. } else {
  403. button -= Button1;
  404. if(button >= 3)
  405. button += 64 - 3;
  406. if(e->xbutton.type == ButtonPress) {
  407. ob = button;
  408. ox = x, oy = y;
  409. }
  410. }
  411. buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
  412. + (state & Mod4Mask ? 8 : 0)
  413. + (state & ControlMask ? 16 : 0);
  414. ttywrite(buf, sizeof(buf));
  415. }
  416. void
  417. bpress(XEvent *e) {
  418. if(IS_SET(MODE_MOUSE))
  419. mousereport(e);
  420. else if(e->xbutton.button == Button1) {
  421. sel.mode = 1;
  422. sel.ex = sel.bx = X2COL(e->xbutton.x);
  423. sel.ey = sel.by = Y2ROW(e->xbutton.y);
  424. }
  425. }
  426. void
  427. selcopy(void) {
  428. char *str, *ptr;
  429. int x, y, sz, sl, ls = 0;
  430. if(sel.bx == -1)
  431. str = NULL;
  432. else {
  433. sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
  434. ptr = str = malloc(sz);
  435. for(y = 0; y < term.row; y++) {
  436. for(x = 0; x < term.col; x++)
  437. if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
  438. sl = utf8size(term.line[y][x].c);
  439. memcpy(ptr, term.line[y][x].c, sl);
  440. ptr += sl;
  441. }
  442. if(ls && y < sel.e.y)
  443. *ptr++ = '\n';
  444. }
  445. *ptr = 0;
  446. }
  447. xsetsel(str);
  448. }
  449. void
  450. selnotify(XEvent *e) {
  451. unsigned long nitems, ofs, rem;
  452. int format;
  453. unsigned char *data;
  454. Atom type;
  455. ofs = 0;
  456. do {
  457. if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
  458. False, AnyPropertyType, &type, &format,
  459. &nitems, &rem, &data)) {
  460. fprintf(stderr, "Clipboard allocation failed\n");
  461. return;
  462. }
  463. ttywrite((const char *) data, nitems * format / 8);
  464. XFree(data);
  465. /* number of 32-bit chunks returned */
  466. ofs += nitems * format / 32;
  467. } while(rem > 0);
  468. }
  469. void
  470. selpaste() {
  471. XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
  472. }
  473. void
  474. selrequest(XEvent *e) {
  475. XSelectionRequestEvent *xsre;
  476. XSelectionEvent xev;
  477. Atom xa_targets;
  478. xsre = (XSelectionRequestEvent *) e;
  479. xev.type = SelectionNotify;
  480. xev.requestor = xsre->requestor;
  481. xev.selection = xsre->selection;
  482. xev.target = xsre->target;
  483. xev.time = xsre->time;
  484. /* reject */
  485. xev.property = None;
  486. xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
  487. if(xsre->target == xa_targets) {
  488. /* respond with the supported type */
  489. Atom string = sel.xtarget;
  490. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  491. XA_ATOM, 32, PropModeReplace,
  492. (unsigned char *) &string, 1);
  493. xev.property = xsre->property;
  494. } else if(xsre->target == sel.xtarget) {
  495. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  496. xsre->target, 8, PropModeReplace,
  497. (unsigned char *) sel.clip, strlen(sel.clip));
  498. xev.property = xsre->property;
  499. }
  500. /* all done, send a notification to the listener */
  501. if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
  502. fprintf(stderr, "Error sending SelectionNotify event\n");
  503. }
  504. void
  505. xsetsel(char *str) {
  506. /* register the selection for both the clipboard and the primary */
  507. Atom clipboard;
  508. free(sel.clip);
  509. sel.clip = str;
  510. XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
  511. clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
  512. XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
  513. XFlush(xw.dpy);
  514. }
  515. void
  516. brelease(XEvent *e) {
  517. if(IS_SET(MODE_MOUSE)) {
  518. mousereport(e);
  519. return;
  520. }
  521. if(e->xbutton.button == Button2)
  522. selpaste();
  523. else if(e->xbutton.button == Button1) {
  524. sel.mode = 0;
  525. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  526. if(sel.bx == sel.ex && sel.by == sel.ey) {
  527. struct timeval now;
  528. sel.bx = -1;
  529. gettimeofday(&now, NULL);
  530. if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
  531. /* triple click on the line */
  532. sel.b.x = sel.bx = 0;
  533. sel.e.x = sel.ex = term.col;
  534. sel.b.y = sel.e.y = sel.ey;
  535. selcopy();
  536. } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
  537. /* double click to select word */
  538. sel.bx = sel.ex;
  539. while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
  540. term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
  541. sel.b.x = sel.bx;
  542. while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
  543. term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
  544. sel.e.x = sel.ex;
  545. sel.b.y = sel.e.y = sel.ey;
  546. selcopy();
  547. }
  548. } else
  549. selcopy();
  550. }
  551. memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
  552. gettimeofday(&sel.tclick1, NULL);
  553. draw();
  554. }
  555. void
  556. bmotion(XEvent *e) {
  557. if(IS_SET(MODE_MOUSE)) {
  558. mousereport(e);
  559. return;
  560. }
  561. if(sel.mode) {
  562. int oldey = sel.ey, oldex = sel.ex;
  563. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  564. if(oldey != sel.ey || oldex != sel.ex) {
  565. int starty = MIN(oldey, sel.ey);
  566. int endy = MAX(oldey, sel.ey);
  567. drawregion(0, (starty > 0 ? starty : 0), term.col, (endy < term.row ? endy+1 : term.row));
  568. }
  569. }
  570. }
  571. void
  572. die(const char *errstr, ...) {
  573. va_list ap;
  574. va_start(ap, errstr);
  575. vfprintf(stderr, errstr, ap);
  576. va_end(ap);
  577. exit(EXIT_FAILURE);
  578. }
  579. void
  580. execsh(void) {
  581. char **args;
  582. char *envshell = getenv("SHELL");
  583. DEFAULT(envshell, "sh");
  584. putenv("TERM="TNAME);
  585. args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
  586. execvp(args[0], args);
  587. exit(EXIT_FAILURE);
  588. }
  589. void
  590. sigchld(int a) {
  591. int stat = 0;
  592. if(waitpid(pid, &stat, 0) < 0)
  593. die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
  594. if(WIFEXITED(stat))
  595. exit(WEXITSTATUS(stat));
  596. else
  597. exit(EXIT_FAILURE);
  598. }
  599. void
  600. ttynew(void) {
  601. int m, s;
  602. /* seems to work fine on linux, openbsd and freebsd */
  603. struct winsize w = {term.row, term.col, 0, 0};
  604. if(openpty(&m, &s, NULL, NULL, &w) < 0)
  605. die("openpty failed: %s\n", SERRNO);
  606. switch(pid = fork()) {
  607. case -1:
  608. die("fork failed\n");
  609. break;
  610. case 0:
  611. setsid(); /* create a new process group */
  612. dup2(s, STDIN_FILENO);
  613. dup2(s, STDOUT_FILENO);
  614. dup2(s, STDERR_FILENO);
  615. if(ioctl(s, TIOCSCTTY, NULL) < 0)
  616. die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
  617. close(s);
  618. close(m);
  619. execsh();
  620. break;
  621. default:
  622. close(s);
  623. cmdfd = m;
  624. signal(SIGCHLD, sigchld);
  625. }
  626. }
  627. void
  628. dump(char c) {
  629. static int col;
  630. fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
  631. if(++col % 10 == 0)
  632. fprintf(stderr, "\n");
  633. }
  634. void
  635. ttyread(void) {
  636. static char buf[BUFSIZ];
  637. static int buflen = 0;
  638. char *ptr;
  639. char s[UTF_SIZ];
  640. int charsize; /* size of utf8 char in bytes */
  641. long utf8c;
  642. int ret;
  643. /* append read bytes to unprocessed bytes */
  644. if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
  645. die("Couldn't read from shell: %s\n", SERRNO);
  646. /* process every complete utf8 char */
  647. buflen += ret;
  648. ptr = buf;
  649. while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
  650. charsize = utf8decode(ptr, &utf8c);
  651. utf8encode(&utf8c, s);
  652. tputc(s);
  653. ptr += charsize;
  654. buflen -= charsize;
  655. }
  656. /* keep any uncomplete utf8 char for the next call */
  657. memmove(buf, ptr, buflen);
  658. }
  659. void
  660. ttywrite(const char *s, size_t n) {
  661. if(write(cmdfd, s, n) == -1)
  662. die("write error on tty: %s\n", SERRNO);
  663. }
  664. void
  665. ttyresize(int x, int y) {
  666. struct winsize w;
  667. w.ws_row = term.row;
  668. w.ws_col = term.col;
  669. w.ws_xpixel = w.ws_ypixel = 0;
  670. if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
  671. fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
  672. }
  673. void
  674. tfulldirt(void)
  675. {
  676. int i;
  677. for(i = 0; i < term.row; i++)
  678. term.dirty[i] = 1;
  679. }
  680. void
  681. tcursor(int mode) {
  682. static TCursor c;
  683. if(mode == CURSOR_SAVE)
  684. c = term.c;
  685. else if(mode == CURSOR_LOAD)
  686. term.c = c, tmoveto(c.x, c.y);
  687. }
  688. void
  689. treset(void) {
  690. term.c = (TCursor){{
  691. .mode = ATTR_NULL,
  692. .fg = DefaultFG,
  693. .bg = DefaultBG
  694. }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
  695. term.top = 0, term.bot = term.row - 1;
  696. term.mode = MODE_WRAP;
  697. tclearregion(0, 0, term.col-1, term.row-1);
  698. }
  699. void
  700. tnew(int col, int row) {
  701. /* set screen size */
  702. term.row = row, term.col = col;
  703. term.line = malloc(term.row * sizeof(Line));
  704. term.alt = malloc(term.row * sizeof(Line));
  705. term.dirty = malloc(term.row * sizeof(*term.dirty));
  706. for(row = 0; row < term.row; row++) {
  707. term.line[row] = malloc(term.col * sizeof(Glyph));
  708. term.alt [row] = malloc(term.col * sizeof(Glyph));
  709. term.dirty[row] = 0;
  710. }
  711. /* setup screen */
  712. treset();
  713. }
  714. void
  715. tswapscreen(void) {
  716. Line* tmp = term.line;
  717. term.line = term.alt;
  718. term.alt = tmp;
  719. term.mode ^= MODE_ALTSCREEN;
  720. tfulldirt();
  721. }
  722. void
  723. tscrolldown(int orig, int n) {
  724. int i;
  725. Line temp;
  726. LIMIT(n, 0, term.bot-orig+1);
  727. tclearregion(0, term.bot-n+1, term.col-1, term.bot);
  728. for(i = term.bot; i >= orig+n; i--) {
  729. temp = term.line[i];
  730. term.line[i] = term.line[i-n];
  731. term.line[i-n] = temp;
  732. term.dirty[i] = 1;
  733. term.dirty[i-n] = 1;
  734. }
  735. selscroll(orig, n);
  736. }
  737. void
  738. tscrollup(int orig, int n) {
  739. int i;
  740. Line temp;
  741. LIMIT(n, 0, term.bot-orig+1);
  742. tclearregion(0, orig, term.col-1, orig+n-1);
  743. for(i = orig; i <= term.bot-n; i++) {
  744. temp = term.line[i];
  745. term.line[i] = term.line[i+n];
  746. term.line[i+n] = temp;
  747. term.dirty[i] = 1;
  748. term.dirty[i+n] = 1;
  749. }
  750. selscroll(orig, -n);
  751. }
  752. void
  753. selscroll(int orig, int n) {
  754. if(sel.bx == -1)
  755. return;
  756. if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
  757. if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
  758. sel.bx = -1;
  759. return;
  760. }
  761. if(sel.by < term.top) {
  762. sel.by = term.top;
  763. sel.bx = 0;
  764. }
  765. if(sel.ey > term.bot) {
  766. sel.ey = term.bot;
  767. sel.ex = term.col;
  768. }
  769. sel.b.y = sel.by, sel.b.x = sel.bx;
  770. sel.e.y = sel.ey, sel.e.x = sel.ex;
  771. }
  772. }
  773. void
  774. tnewline(int first_col) {
  775. int y = term.c.y;
  776. if(y == term.bot)
  777. tscrollup(term.top, 1);
  778. else
  779. y++;
  780. tmoveto(first_col ? 0 : term.c.x, y);
  781. }
  782. void
  783. csiparse(void) {
  784. /* int noarg = 1; */
  785. char *p = escseq.buf;
  786. escseq.narg = 0;
  787. if(*p == '?')
  788. escseq.priv = 1, p++;
  789. while(p < escseq.buf+escseq.len) {
  790. while(isdigit(*p)) {
  791. escseq.arg[escseq.narg] *= 10;
  792. escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
  793. }
  794. if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
  795. escseq.narg++, p++;
  796. else {
  797. escseq.mode = *p;
  798. escseq.narg++;
  799. return;
  800. }
  801. }
  802. }
  803. void
  804. tmoveto(int x, int y) {
  805. LIMIT(x, 0, term.col-1);
  806. LIMIT(y, 0, term.row-1);
  807. term.c.state &= ~CURSOR_WRAPNEXT;
  808. term.c.x = x;
  809. term.c.y = y;
  810. }
  811. void
  812. tsetchar(char *c) {
  813. term.dirty[term.c.y] = 1;
  814. term.line[term.c.y][term.c.x] = term.c.attr;
  815. memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
  816. term.line[term.c.y][term.c.x].state |= GLYPH_SET;
  817. }
  818. void
  819. tclearregion(int x1, int y1, int x2, int y2) {
  820. int x, y, temp;
  821. if(x1 > x2)
  822. temp = x1, x1 = x2, x2 = temp;
  823. if(y1 > y2)
  824. temp = y1, y1 = y2, y2 = temp;
  825. LIMIT(x1, 0, term.col-1);
  826. LIMIT(x2, 0, term.col-1);
  827. LIMIT(y1, 0, term.row-1);
  828. LIMIT(y2, 0, term.row-1);
  829. for(y = y1; y <= y2; y++) {
  830. term.dirty[y] = 1;
  831. for(x = x1; x <= x2; x++)
  832. term.line[y][x].state = 0;
  833. }
  834. }
  835. void
  836. tdeletechar(int n) {
  837. int src = term.c.x + n;
  838. int dst = term.c.x;
  839. int size = term.col - src;
  840. term.dirty[term.c.y] = 1;
  841. if(src >= term.col) {
  842. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  843. return;
  844. }
  845. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  846. tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
  847. }
  848. void
  849. tinsertblank(int n) {
  850. int src = term.c.x;
  851. int dst = src + n;
  852. int size = term.col - dst;
  853. term.dirty[term.c.y] = 1;
  854. if(dst >= term.col) {
  855. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  856. return;
  857. }
  858. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  859. tclearregion(src, term.c.y, dst - 1, term.c.y);
  860. }
  861. void
  862. tinsertblankline(int n) {
  863. if(term.c.y < term.top || term.c.y > term.bot)
  864. return;
  865. tscrolldown(term.c.y, n);
  866. }
  867. void
  868. tdeleteline(int n) {
  869. if(term.c.y < term.top || term.c.y > term.bot)
  870. return;
  871. tscrollup(term.c.y, n);
  872. }
  873. void
  874. tsetattr(int *attr, int l) {
  875. int i;
  876. for(i = 0; i < l; i++) {
  877. switch(attr[i]) {
  878. case 0:
  879. term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
  880. term.c.attr.fg = DefaultFG;
  881. term.c.attr.bg = DefaultBG;
  882. break;
  883. case 1:
  884. term.c.attr.mode |= ATTR_BOLD;
  885. break;
  886. case 4:
  887. term.c.attr.mode |= ATTR_UNDERLINE;
  888. break;
  889. case 7:
  890. term.c.attr.mode |= ATTR_REVERSE;
  891. break;
  892. case 22:
  893. term.c.attr.mode &= ~ATTR_BOLD;
  894. break;
  895. case 24:
  896. term.c.attr.mode &= ~ATTR_UNDERLINE;
  897. break;
  898. case 27:
  899. term.c.attr.mode &= ~ATTR_REVERSE;
  900. break;
  901. case 38:
  902. if(i + 2 < l && attr[i + 1] == 5) {
  903. i += 2;
  904. if(BETWEEN(attr[i], 0, 255))
  905. term.c.attr.fg = attr[i];
  906. else
  907. fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
  908. }
  909. else
  910. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
  911. break;
  912. case 39:
  913. term.c.attr.fg = DefaultFG;
  914. break;
  915. case 48:
  916. if(i + 2 < l && attr[i + 1] == 5) {
  917. i += 2;
  918. if(BETWEEN(attr[i], 0, 255))
  919. term.c.attr.bg = attr[i];
  920. else
  921. fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
  922. }
  923. else
  924. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
  925. break;
  926. case 49:
  927. term.c.attr.bg = DefaultBG;
  928. break;
  929. default:
  930. if(BETWEEN(attr[i], 30, 37))
  931. term.c.attr.fg = attr[i] - 30;
  932. else if(BETWEEN(attr[i], 40, 47))
  933. term.c.attr.bg = attr[i] - 40;
  934. else if(BETWEEN(attr[i], 90, 97))
  935. term.c.attr.fg = attr[i] - 90 + 8;
  936. else if(BETWEEN(attr[i], 100, 107))
  937. term.c.attr.fg = attr[i] - 100 + 8;
  938. else
  939. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
  940. break;
  941. }
  942. }
  943. }
  944. void
  945. tsetscroll(int t, int b) {
  946. int temp;
  947. LIMIT(t, 0, term.row-1);
  948. LIMIT(b, 0, term.row-1);
  949. if(t > b) {
  950. temp = t;
  951. t = b;
  952. b = temp;
  953. }
  954. term.top = t;
  955. term.bot = b;
  956. }
  957. void
  958. csihandle(void) {
  959. switch(escseq.mode) {
  960. default:
  961. unknown:
  962. fprintf(stderr, "erresc: unknown csi ");
  963. csidump();
  964. /* die(""); */
  965. break;
  966. case '@': /* ICH -- Insert <n> blank char */
  967. DEFAULT(escseq.arg[0], 1);
  968. tinsertblank(escseq.arg[0]);
  969. break;
  970. case 'A': /* CUU -- Cursor <n> Up */
  971. case 'e':
  972. DEFAULT(escseq.arg[0], 1);
  973. tmoveto(term.c.x, term.c.y-escseq.arg[0]);
  974. break;
  975. case 'B': /* CUD -- Cursor <n> Down */
  976. DEFAULT(escseq.arg[0], 1);
  977. tmoveto(term.c.x, term.c.y+escseq.arg[0]);
  978. break;
  979. case 'C': /* CUF -- Cursor <n> Forward */
  980. case 'a':
  981. DEFAULT(escseq.arg[0], 1);
  982. tmoveto(term.c.x+escseq.arg[0], term.c.y);
  983. break;
  984. case 'D': /* CUB -- Cursor <n> Backward */
  985. DEFAULT(escseq.arg[0], 1);
  986. tmoveto(term.c.x-escseq.arg[0], term.c.y);
  987. break;
  988. case 'E': /* CNL -- Cursor <n> Down and first col */
  989. DEFAULT(escseq.arg[0], 1);
  990. tmoveto(0, term.c.y+escseq.arg[0]);
  991. break;
  992. case 'F': /* CPL -- Cursor <n> Up and first col */
  993. DEFAULT(escseq.arg[0], 1);
  994. tmoveto(0, term.c.y-escseq.arg[0]);
  995. break;
  996. case 'G': /* CHA -- Move to <col> */
  997. case '`': /* XXX: HPA -- same? */
  998. DEFAULT(escseq.arg[0], 1);
  999. tmoveto(escseq.arg[0]-1, term.c.y);
  1000. break;
  1001. case 'H': /* CUP -- Move to <row> <col> */
  1002. case 'f': /* XXX: HVP -- same? */
  1003. DEFAULT(escseq.arg[0], 1);
  1004. DEFAULT(escseq.arg[1], 1);
  1005. tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
  1006. break;
  1007. /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
  1008. case 'J': /* ED -- Clear screen */
  1009. sel.bx = -1;
  1010. switch(escseq.arg[0]) {
  1011. case 0: /* below */
  1012. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1013. if(term.c.y < term.row-1)
  1014. tclearregion(0, term.c.y+1, term.col-1, term.row-1);
  1015. break;
  1016. case 1: /* above */
  1017. if(term.c.y > 1)
  1018. tclearregion(0, 0, term.col-1, term.c.y-1);
  1019. tclearregion(0, term.c.y, term.c.x, term.c.y);
  1020. break;
  1021. case 2: /* all */
  1022. tclearregion(0, 0, term.col-1, term.row-1);
  1023. break;
  1024. default:
  1025. goto unknown;
  1026. }
  1027. break;
  1028. case 'K': /* EL -- Clear line */
  1029. switch(escseq.arg[0]) {
  1030. case 0: /* right */
  1031. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1032. break;
  1033. case 1: /* left */
  1034. tclearregion(0, term.c.y, term.c.x, term.c.y);
  1035. break;
  1036. case 2: /* all */
  1037. tclearregion(0, term.c.y, term.col-1, term.c.y);
  1038. break;
  1039. }
  1040. break;
  1041. case 'S': /* SU -- Scroll <n> line up */
  1042. DEFAULT(escseq.arg[0], 1);
  1043. tscrollup(term.top, escseq.arg[0]);
  1044. break;
  1045. case 'T': /* SD -- Scroll <n> line down */
  1046. DEFAULT(escseq.arg[0], 1);
  1047. tscrolldown(term.top, escseq.arg[0]);
  1048. break;
  1049. case 'L': /* IL -- Insert <n> blank lines */
  1050. DEFAULT(escseq.arg[0], 1);
  1051. tinsertblankline(escseq.arg[0]);
  1052. break;
  1053. case 'l': /* RM -- Reset Mode */
  1054. if(escseq.priv) {
  1055. switch(escseq.arg[0]) {
  1056. case 1:
  1057. term.mode &= ~MODE_APPKEYPAD;
  1058. break;
  1059. case 5: /* DECSCNM -- Remove reverse video */
  1060. if(IS_SET(MODE_REVERSE)) {
  1061. term.mode &= ~MODE_REVERSE;
  1062. draw();
  1063. }
  1064. break;
  1065. case 7:
  1066. term.mode &= ~MODE_WRAP;
  1067. break;
  1068. case 12: /* att610 -- Stop blinking cursor (IGNORED) */
  1069. break;
  1070. case 20:
  1071. term.mode &= ~MODE_CRLF;
  1072. break;
  1073. case 25:
  1074. term.c.state |= CURSOR_HIDE;
  1075. break;
  1076. case 1000: /* disable X11 xterm mouse reporting */
  1077. term.mode &= ~MODE_MOUSEBTN;
  1078. break;
  1079. case 1002:
  1080. term.mode &= ~MODE_MOUSEMOTION;
  1081. break;
  1082. case 1049: /* = 1047 and 1048 */
  1083. case 47:
  1084. case 1047:
  1085. if(IS_SET(MODE_ALTSCREEN)) {
  1086. tclearregion(0, 0, term.col-1, term.row-1);
  1087. tswapscreen();
  1088. }
  1089. if(escseq.arg[0] != 1049)
  1090. break;
  1091. case 1048:
  1092. tcursor(CURSOR_LOAD);
  1093. break;
  1094. default:
  1095. goto unknown;
  1096. }
  1097. } else {
  1098. switch(escseq.arg[0]) {
  1099. case 4:
  1100. term.mode &= ~MODE_INSERT;
  1101. break;
  1102. default:
  1103. goto unknown;
  1104. }
  1105. }
  1106. break;
  1107. case 'M': /* DL -- Delete <n> lines */
  1108. DEFAULT(escseq.arg[0], 1);
  1109. tdeleteline(escseq.arg[0]);
  1110. break;
  1111. case 'X': /* ECH -- Erase <n> char */
  1112. DEFAULT(escseq.arg[0], 1);
  1113. tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
  1114. break;
  1115. case 'P': /* DCH -- Delete <n> char */
  1116. DEFAULT(escseq.arg[0], 1);
  1117. tdeletechar(escseq.arg[0]);
  1118. break;
  1119. /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
  1120. case 'd': /* VPA -- Move to <row> */
  1121. DEFAULT(escseq.arg[0], 1);
  1122. tmoveto(term.c.x, escseq.arg[0]-1);
  1123. break;
  1124. case 'h': /* SM -- Set terminal mode */
  1125. if(escseq.priv) {
  1126. switch(escseq.arg[0]) {
  1127. case 1:
  1128. term.mode |= MODE_APPKEYPAD;
  1129. break;
  1130. case 5: /* DECSCNM -- Reverve video */
  1131. if(!IS_SET(MODE_REVERSE)) {
  1132. term.mode |= MODE_REVERSE;
  1133. draw();
  1134. }
  1135. break;
  1136. case 7:
  1137. term.mode |= MODE_WRAP;
  1138. break;
  1139. case 20:
  1140. term.mode |= MODE_CRLF;
  1141. break;
  1142. case 12: /* att610 -- Start blinking cursor (IGNORED) */
  1143. /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
  1144. if(escseq.narg > 1 && escseq.arg[1] != 25)
  1145. break;
  1146. case 25:
  1147. term.c.state &= ~CURSOR_HIDE;
  1148. break;
  1149. case 1000: /* 1000,1002: enable xterm mouse report */
  1150. term.mode |= MODE_MOUSEBTN;
  1151. break;
  1152. case 1002:
  1153. term.mode |= MODE_MOUSEMOTION;
  1154. break;
  1155. case 1049: /* = 1047 and 1048 */
  1156. case 47:
  1157. case 1047:
  1158. if(IS_SET(MODE_ALTSCREEN))
  1159. tclearregion(0, 0, term.col-1, term.row-1);
  1160. else
  1161. tswapscreen();
  1162. if(escseq.arg[0] != 1049)
  1163. break;
  1164. case 1048:
  1165. tcursor(CURSOR_SAVE);
  1166. break;
  1167. default: goto unknown;
  1168. }
  1169. } else {
  1170. switch(escseq.arg[0]) {
  1171. case 4:
  1172. term.mode |= MODE_INSERT;
  1173. break;
  1174. default: goto unknown;
  1175. }
  1176. };
  1177. break;
  1178. case 'm': /* SGR -- Terminal attribute (color) */
  1179. tsetattr(escseq.arg, escseq.narg);
  1180. break;
  1181. case 'r': /* DECSTBM -- Set Scrolling Region */
  1182. if(escseq.priv)
  1183. goto unknown;
  1184. else {
  1185. DEFAULT(escseq.arg[0], 1);
  1186. DEFAULT(escseq.arg[1], term.row);
  1187. tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
  1188. tmoveto(0, 0);
  1189. }
  1190. break;
  1191. case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
  1192. tcursor(CURSOR_SAVE);
  1193. break;
  1194. case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
  1195. tcursor(CURSOR_LOAD);
  1196. break;
  1197. }
  1198. }
  1199. void
  1200. csidump(void) {
  1201. int i;
  1202. printf("ESC [ %s", escseq.priv ? "? " : "");
  1203. if(escseq.narg)
  1204. for(i = 0; i < escseq.narg; i++)
  1205. printf("%d ", escseq.arg[i]);
  1206. if(escseq.mode)
  1207. putchar(escseq.mode);
  1208. putchar('\n');
  1209. }
  1210. void
  1211. csireset(void) {
  1212. memset(&escseq, 0, sizeof(escseq));
  1213. }
  1214. void
  1215. tputtab(void) {
  1216. int space = TAB - term.c.x % TAB;
  1217. tmoveto(term.c.x + space, term.c.y);
  1218. }
  1219. void
  1220. tputc(char *c) {
  1221. char ascii = *c;
  1222. if(term.esc & ESC_START) {
  1223. if(term.esc & ESC_CSI) {
  1224. escseq.buf[escseq.len++] = ascii;
  1225. if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
  1226. term.esc = 0;
  1227. csiparse(), csihandle();
  1228. }
  1229. /* TODO: handle other OSC */
  1230. } else if(term.esc & ESC_OSC) {
  1231. if(ascii == ';') {
  1232. term.titlelen = 0;
  1233. term.esc = ESC_START | ESC_TITLE;
  1234. }
  1235. } else if(term.esc & ESC_TITLE) {
  1236. if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
  1237. term.esc = 0;
  1238. term.title[term.titlelen] = '\0';
  1239. XStoreName(xw.dpy, xw.win, term.title);
  1240. } else {
  1241. term.title[term.titlelen++] = ascii;
  1242. }
  1243. } else if(term.esc & ESC_ALTCHARSET) {
  1244. switch(ascii) {
  1245. case '0': /* Line drawing crap */
  1246. term.c.attr.mode |= ATTR_GFX;
  1247. break;
  1248. case 'B': /* Back to regular text */
  1249. term.c.attr.mode &= ~ATTR_GFX;
  1250. break;
  1251. default:
  1252. fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
  1253. }
  1254. term.esc = 0;
  1255. } else {
  1256. switch(ascii) {
  1257. case '[':
  1258. term.esc |= ESC_CSI;
  1259. break;
  1260. case ']':
  1261. term.esc |= ESC_OSC;
  1262. break;
  1263. case '(':
  1264. term.esc |= ESC_ALTCHARSET;
  1265. break;
  1266. case 'D': /* IND -- Linefeed */
  1267. if(term.c.y == term.bot)
  1268. tscrollup(term.top, 1);
  1269. else
  1270. tmoveto(term.c.x, term.c.y+1);
  1271. term.esc = 0;
  1272. break;
  1273. case 'E': /* NEL -- Next line */
  1274. tnewline(1); /* always go to first col */
  1275. term.esc = 0;
  1276. break;
  1277. case 'M': /* RI -- Reverse index */
  1278. if(term.c.y == term.top)
  1279. tscrolldown(term.top, 1);
  1280. else
  1281. tmoveto(term.c.x, term.c.y-1);
  1282. term.esc = 0;
  1283. break;
  1284. case 'c': /* RIS -- Reset to inital state */
  1285. treset();
  1286. term.esc = 0;
  1287. break;
  1288. case '=': /* DECPAM -- Application keypad */
  1289. term.mode |= MODE_APPKEYPAD;
  1290. term.esc = 0;
  1291. break;
  1292. case '>': /* DECPNM -- Normal keypad */
  1293. term.mode &= ~MODE_APPKEYPAD;
  1294. term.esc = 0;
  1295. break;
  1296. case '7': /* DECSC -- Save Cursor */
  1297. tcursor(CURSOR_SAVE);
  1298. term.esc = 0;
  1299. break;
  1300. case '8': /* DECRC -- Restore Cursor */
  1301. tcursor(CURSOR_LOAD);
  1302. term.esc = 0;
  1303. break;
  1304. default:
  1305. fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
  1306. (unsigned char) ascii, isprint(ascii)?ascii:'.');
  1307. term.esc = 0;
  1308. }
  1309. }
  1310. } else {
  1311. if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
  1312. sel.bx = -1;
  1313. switch(ascii) {
  1314. case '\t':
  1315. tputtab();
  1316. break;
  1317. case '\b':
  1318. tmoveto(term.c.x-1, term.c.y);
  1319. break;
  1320. case '\r':
  1321. tmoveto(0, term.c.y);
  1322. break;
  1323. case '\f':
  1324. case '\v':
  1325. case '\n':
  1326. /* go to first col if the mode is set */
  1327. tnewline(IS_SET(MODE_CRLF));
  1328. break;
  1329. case '\a':
  1330. if(!(xw.state & WIN_FOCUSED))
  1331. xseturgency(1);
  1332. break;
  1333. case '\033':
  1334. csireset();
  1335. term.esc = ESC_START;
  1336. break;
  1337. default:
  1338. if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
  1339. tnewline(1); /* always go to first col */
  1340. tsetchar(c);
  1341. if(term.c.x+1 < term.col)
  1342. tmoveto(term.c.x+1, term.c.y);
  1343. else
  1344. term.c.state |= CURSOR_WRAPNEXT;
  1345. }
  1346. }
  1347. }
  1348. int
  1349. tresize(int col, int row) {
  1350. int i, x;
  1351. int minrow = MIN(row, term.row);
  1352. int mincol = MIN(col, term.col);
  1353. int slide = term.c.y - row + 1;
  1354. if(col < 1 || row < 1)
  1355. return 0;
  1356. /* free unneeded rows */
  1357. i = 0;
  1358. if(slide > 0) {
  1359. /* slide screen to keep cursor where we expect it -
  1360. * tscrollup would work here, but we can optimize to
  1361. * memmove because we're freeing the earlier lines */
  1362. for(/* i = 0 */; i < slide; i++) {
  1363. free(term.line[i]);
  1364. free(term.alt[i]);
  1365. }
  1366. memmove(term.line, term.line + slide, row * sizeof(Line));
  1367. memmove(term.alt, term.alt + slide, row * sizeof(Line));
  1368. }
  1369. for(i += row; i < term.row; i++) {
  1370. free(term.line[i]);
  1371. free(term.alt[i]);
  1372. }
  1373. /* resize to new height */
  1374. term.line = realloc(term.line, row * sizeof(Line));
  1375. term.alt = realloc(term.alt, row * sizeof(Line));
  1376. term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
  1377. /* resize each row to new width, zero-pad if needed */
  1378. for(i = 0; i < minrow; i++) {
  1379. term.dirty[i] = 1;
  1380. term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
  1381. term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
  1382. for(x = mincol; x < col; x++) {
  1383. term.line[i][x].state = 0;
  1384. term.alt[i][x].state = 0;
  1385. }
  1386. }
  1387. /* allocate any new rows */
  1388. for(/* i == minrow */; i < row; i++) {
  1389. term.dirty[i] = 1;
  1390. term.line[i] = calloc(col, sizeof(Glyph));
  1391. term.alt [i] = calloc(col, sizeof(Glyph));
  1392. }
  1393. /* update terminal size */
  1394. term.col = col, term.row = row;
  1395. /* make use of the LIMIT in tmoveto */
  1396. tmoveto(term.c.x, term.c.y);
  1397. /* reset scrolling region */
  1398. tsetscroll(0, row-1);
  1399. return (slide > 0);
  1400. }
  1401. void
  1402. xresize(int col, int row) {
  1403. Pixmap newbuf;
  1404. int oldw, oldh;
  1405. oldw = xw.bufw;
  1406. oldh = xw.bufh;
  1407. xw.bufw = MAX(1, col * xw.cw);
  1408. xw.bufh = MAX(1, row * xw.ch);
  1409. newbuf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
  1410. XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
  1411. XFreePixmap(xw.dpy, xw.buf);
  1412. XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
  1413. if(xw.bufw > oldw)
  1414. XFillRectangle(xw.dpy, newbuf, dc.gc, oldw, 0,
  1415. xw.bufw-oldw, MIN(xw.bufh, oldh));
  1416. else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
  1417. XClearArea(xw.dpy, xw.win, BORDER+xw.bufw, BORDER,
  1418. xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
  1419. False);
  1420. if(xw.bufh > oldh)
  1421. XFillRectangle(xw.dpy, newbuf, dc.gc, 0, oldh,
  1422. xw.bufw, xw.bufh-oldh);
  1423. else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
  1424. XClearArea(xw.dpy, xw.win, BORDER, BORDER+xw.bufh,
  1425. xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
  1426. False);
  1427. xw.buf = newbuf;
  1428. }
  1429. void
  1430. xloadcols(void) {
  1431. int i, r, g, b;
  1432. XColor color;
  1433. unsigned long white = WhitePixel(xw.dpy, xw.scr);
  1434. for(i = 0; i < LEN(colorname); i++) {
  1435. if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
  1436. dc.col[i] = white;
  1437. fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
  1438. } else
  1439. dc.col[i] = color.pixel;
  1440. }
  1441. /* same colors as xterm */
  1442. for(r = 0; r < 6; r++)
  1443. for(g = 0; g < 6; g++)
  1444. for(b = 0; b < 6; b++) {
  1445. color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
  1446. color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
  1447. color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
  1448. if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1449. dc.col[i] = white;
  1450. fprintf(stderr, "Could not allocate color %d\n", i);
  1451. } else
  1452. dc.col[i] = color.pixel;
  1453. i++;
  1454. }
  1455. for(r = 0; r < 24; r++, i++) {
  1456. color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
  1457. if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1458. dc.col[i] = white;
  1459. fprintf(stderr, "Could not allocate color %d\n", i);
  1460. } else
  1461. dc.col[i] = color.pixel;
  1462. }
  1463. }
  1464. void
  1465. xclear(int x1, int y1, int x2, int y2) {
  1466. XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
  1467. XFillRectangle(xw.dpy, xw.buf, dc.gc,
  1468. x1 * xw.cw, y1 * xw.ch,
  1469. (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
  1470. }
  1471. void
  1472. xhints(void) {
  1473. XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
  1474. XWMHints wm = {.flags = InputHint, .input = 1};
  1475. XSizeHints size = {
  1476. .flags = PSize | PResizeInc | PBaseSize,
  1477. .height = xw.h,
  1478. .width = xw.w,
  1479. .height_inc = xw.ch,
  1480. .width_inc = xw.cw,
  1481. .base_height = 2*BORDER,
  1482. .base_width = 2*BORDER,
  1483. };
  1484. XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
  1485. }
  1486. XFontSet
  1487. xinitfont(char *fontstr) {
  1488. XFontSet set;
  1489. char *def, **missing;
  1490. int n;
  1491. missing = NULL;
  1492. set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
  1493. if(missing) {
  1494. while(n--)
  1495. fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
  1496. XFreeStringList(missing);
  1497. }
  1498. return set;
  1499. }
  1500. void
  1501. xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
  1502. XFontStruct **xfonts;
  1503. char **font_names;
  1504. int i, n;
  1505. *ascent = *descent = *lbearing = *rbearing = 0;
  1506. n = XFontsOfFontSet(set, &xfonts, &font_names);
  1507. for(i = 0; i < n; i++) {
  1508. *ascent = MAX(*ascent, (*xfonts)->ascent);
  1509. *descent = MAX(*descent, (*xfonts)->descent);
  1510. *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
  1511. *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
  1512. xfonts++;
  1513. }
  1514. }
  1515. void
  1516. initfonts(char *fontstr, char *bfontstr) {
  1517. if((dc.font.set = xinitfont(fontstr)) == NULL ||
  1518. (dc.bfont.set = xinitfont(bfontstr)) == NULL)
  1519. die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
  1520. xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
  1521. &dc.font.lbearing, &dc.font.rbearing);
  1522. xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
  1523. &dc.bfont.lbearing, &dc.bfont.rbearing);
  1524. }
  1525. void
  1526. xinit(void) {
  1527. XSetWindowAttributes attrs;
  1528. Cursor cursor;
  1529. Window parent;
  1530. if(!(xw.dpy = XOpenDisplay(NULL)))
  1531. die("Can't open display\n");
  1532. xw.scr = XDefaultScreen(xw.dpy);
  1533. /* font */
  1534. initfonts(FONT, BOLDFONT);
  1535. /* XXX: Assuming same size for bold font */
  1536. xw.cw = dc.font.rbearing - dc.font.lbearing;
  1537. xw.ch = dc.font.ascent + dc.font.descent;
  1538. /* colors */
  1539. xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
  1540. xloadcols();
  1541. /* window - default size */
  1542. xw.bufh = term.row * xw.ch;
  1543. xw.bufw = term.col * xw.cw;
  1544. xw.h = xw.bufh + 2*BORDER;
  1545. xw.w = xw.bufw + 2*BORDER;
  1546. attrs.background_pixel = dc.col[DefaultBG];
  1547. attrs.border_pixel = dc.col[DefaultBG];
  1548. attrs.bit_gravity = NorthWestGravity;
  1549. attrs.event_mask = FocusChangeMask | KeyPressMask
  1550. | ExposureMask | VisibilityChangeMask | StructureNotifyMask
  1551. | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
  1552. | EnterWindowMask | LeaveWindowMask;
  1553. attrs.colormap = xw.cmap;
  1554. parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
  1555. xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
  1556. xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
  1557. XDefaultVisual(xw.dpy, xw.scr),
  1558. CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
  1559. | CWColormap,
  1560. &attrs);
  1561. xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
  1562. /* input methods */
  1563. xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
  1564. xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
  1565. | XIMStatusNothing, XNClientWindow, xw.win,
  1566. XNFocusWindow, xw.win, NULL);
  1567. /* gc */
  1568. dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
  1569. /* white cursor, black outline */
  1570. cursor = XCreateFontCursor(xw.dpy, XC_xterm);
  1571. XDefineCursor(xw.dpy, xw.win, cursor);
  1572. XRecolorCursor(xw.dpy, cursor,
  1573. &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
  1574. &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
  1575. xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
  1576. XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
  1577. XMapWindow(xw.dpy, xw.win);
  1578. xhints();
  1579. XSync(xw.dpy, 0);
  1580. }
  1581. void
  1582. xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
  1583. unsigned long xfg = dc.col[base.fg], xbg = dc.col[base.bg], temp;
  1584. int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
  1585. int i;
  1586. /* only switch default fg/bg if term is in RV mode */
  1587. if(IS_SET(MODE_REVERSE)) {
  1588. if(base.fg == DefaultFG)
  1589. xfg = dc.col[DefaultBG];
  1590. if(base.bg == DefaultBG)
  1591. xbg = dc.col[DefaultFG];
  1592. }
  1593. if(base.mode & ATTR_REVERSE)
  1594. temp = xfg, xfg = xbg, xbg = temp;
  1595. XSetBackground(xw.dpy, dc.gc, xbg);
  1596. XSetForeground(xw.dpy, dc.gc, xfg);
  1597. if(base.mode & ATTR_GFX) {
  1598. for(i = 0; i < bytelen; i++) {
  1599. char c = gfx[(unsigned int)s[i] % 256];
  1600. if(c)
  1601. s[i] = c;
  1602. else if(s[i] > 0x5f)
  1603. s[i] -= 0x5f;
  1604. }
  1605. }
  1606. XmbDrawImageString(xw.dpy, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
  1607. dc.gc, winx, winy, s, bytelen);
  1608. if(base.mode & ATTR_UNDERLINE)
  1609. XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
  1610. }
  1611. void
  1612. xdrawcursor(void) {
  1613. static int oldx = 0;
  1614. static int oldy = 0;
  1615. int sl;
  1616. Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
  1617. LIMIT(oldx, 0, term.col-1);
  1618. LIMIT(oldy, 0, term.row-1);
  1619. if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
  1620. memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
  1621. /* remove the old cursor */
  1622. if(term.line[oldy][oldx].state & GLYPH_SET) {
  1623. sl = utf8size(term.line[oldy][oldx].c);
  1624. xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
  1625. } else
  1626. xclear(oldx, oldy, oldx, oldy);
  1627. /* draw the new one */
  1628. if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
  1629. sl = utf8size(g.c);
  1630. if(IS_SET(MODE_REVERSE))
  1631. g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
  1632. xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
  1633. oldx = term.c.x, oldy = term.c.y;
  1634. }
  1635. }
  1636. void
  1637. draw() {
  1638. drawregion(0, 0, term.col, term.row);
  1639. }
  1640. void
  1641. drawregion(int x1, int y1, int x2, int y2) {
  1642. int ic, ib, x, y, ox, sl;
  1643. Glyph base, new;
  1644. char buf[DRAW_BUF_SIZ];
  1645. if(!(xw.state & WIN_VISIBLE))
  1646. return;
  1647. for(y = y1; y < y2; y++) {
  1648. if(!term.dirty[y])
  1649. continue;
  1650. xclear(0, y, term.col, y);
  1651. term.dirty[y] = 0;
  1652. base = term.line[y][0];
  1653. ic = ib = ox = 0;
  1654. for(x = x1; x < x2; x++) {
  1655. new = term.line[y][x];
  1656. if(sel.bx != -1 && *(new.c) && selected(x, y))
  1657. new.mode ^= ATTR_REVERSE;
  1658. if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
  1659. ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
  1660. xdraws(buf, base, ox, y, ic, ib);
  1661. ic = ib = 0;
  1662. }
  1663. if(new.state & GLYPH_SET) {
  1664. if(ib == 0) {
  1665. ox = x;
  1666. base = new;
  1667. }
  1668. sl = utf8size(new.c);
  1669. memcpy(buf+ib, new.c, sl);
  1670. ib += sl;
  1671. ++ic;
  1672. }
  1673. }
  1674. if(ib > 0)
  1675. xdraws(buf, base, ox, y, ic, ib);
  1676. }
  1677. xdrawcursor();
  1678. XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
  1679. }
  1680. void
  1681. expose(XEvent *ev) {
  1682. XExposeEvent *e = &ev->xexpose;
  1683. if(xw.state & WIN_REDRAW) {
  1684. if(!e->count) {
  1685. xw.state &= ~WIN_REDRAW;
  1686. draw();
  1687. }
  1688. } else
  1689. XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
  1690. e->width, e->height, e->x, e->y);
  1691. }
  1692. void
  1693. visibility(XEvent *ev) {
  1694. XVisibilityEvent *e = &ev->xvisibility;
  1695. if(e->state == VisibilityFullyObscured)
  1696. xw.state &= ~WIN_VISIBLE;
  1697. else if(!(xw.state & WIN_VISIBLE))
  1698. /* need a full redraw for next Expose, not just a buf copy */
  1699. xw.state |= WIN_VISIBLE | WIN_REDRAW;
  1700. }
  1701. void
  1702. unmap(XEvent *ev) {
  1703. xw.state &= ~WIN_VISIBLE;
  1704. }
  1705. void
  1706. xseturgency(int add) {
  1707. XWMHints *h = XGetWMHints(xw.dpy, xw.win);
  1708. h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
  1709. XSetWMHints(xw.dpy, xw.win, h);
  1710. XFree(h);
  1711. }
  1712. void
  1713. focus(XEvent *ev) {
  1714. if(ev->type == FocusIn) {
  1715. xw.state |= WIN_FOCUSED;
  1716. xseturgency(0);
  1717. } else
  1718. xw.state &= ~WIN_FOCUSED;
  1719. draw();
  1720. }
  1721. char*
  1722. kmap(KeySym k, unsigned int state) {
  1723. int i;
  1724. state &= ~Mod2Mask;
  1725. for(i = 0; i < LEN(key); i++) {
  1726. unsigned int mask = key[i].mask;
  1727. if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
  1728. return (char*)key[i].s;
  1729. }
  1730. return NULL;
  1731. }
  1732. void
  1733. kpress(XEvent *ev) {
  1734. XKeyEvent *e = &ev->xkey;
  1735. KeySym ksym;
  1736. char buf[32];
  1737. char *customkey;
  1738. int len;
  1739. int meta;
  1740. int shift;
  1741. Status status;
  1742. meta = e->state & Mod1Mask;
  1743. shift = e->state & ShiftMask;
  1744. len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
  1745. /* 1. custom keys from config.h */
  1746. if((customkey = kmap(ksym, e->state)))
  1747. ttywrite(customkey, strlen(customkey));
  1748. /* 2. hardcoded (overrides X lookup) */
  1749. else
  1750. switch(ksym) {
  1751. case XK_Up:
  1752. case XK_Down:
  1753. case XK_Left:
  1754. case XK_Right:
  1755. /* XXX: shift up/down doesn't work */
  1756. sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
  1757. ttywrite(buf, 3);
  1758. break;
  1759. case XK_Insert:
  1760. if(shift)
  1761. selpaste();
  1762. break;
  1763. case XK_Return:
  1764. if(IS_SET(MODE_CRLF))
  1765. ttywrite("\r\n", 2);
  1766. else
  1767. ttywrite("\r", 1);
  1768. break;
  1769. /* 3. X lookup */
  1770. default:
  1771. if(len > 0) {
  1772. if(meta && len == 1)
  1773. ttywrite("\033", 1);
  1774. ttywrite(buf, len);
  1775. }
  1776. break;
  1777. }
  1778. }
  1779. void
  1780. cmessage(XEvent *e) {
  1781. /* See xembed specs
  1782. http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
  1783. if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
  1784. if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
  1785. xw.state |= WIN_FOCUSED;
  1786. xseturgency(0);
  1787. } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
  1788. xw.state &= ~WIN_FOCUSED;
  1789. }
  1790. draw();
  1791. }
  1792. }
  1793. void
  1794. resize(XEvent *e) {
  1795. int col, row;
  1796. if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
  1797. return;
  1798. xw.w = e->xconfigure.width;
  1799. xw.h = e->xconfigure.height;
  1800. col = (xw.w - 2*BORDER) / xw.cw;
  1801. row = (xw.h - 2*BORDER) / xw.ch;
  1802. if(col == term.col && row == term.row)
  1803. return;
  1804. if(tresize(col, row))
  1805. draw();
  1806. ttyresize(col, row);
  1807. xresize(col, row);
  1808. }
  1809. void
  1810. run(void) {
  1811. XEvent ev;
  1812. fd_set rfd;
  1813. int xfd = XConnectionNumber(xw.dpy);
  1814. for(;;) {
  1815. FD_ZERO(&rfd);
  1816. FD_SET(cmdfd, &rfd);
  1817. FD_SET(xfd, &rfd);
  1818. if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
  1819. if(errno == EINTR)
  1820. continue;
  1821. die("select failed: %s\n", SERRNO);
  1822. }
  1823. if(FD_ISSET(cmdfd, &rfd)) {
  1824. ttyread();
  1825. draw();
  1826. }
  1827. while(XPending(xw.dpy)) {
  1828. XNextEvent(xw.dpy, &ev);
  1829. if(XFilterEvent(&ev, xw.win))
  1830. continue;
  1831. if(handler[ev.type])
  1832. (handler[ev.type])(&ev);
  1833. }
  1834. }
  1835. }
  1836. int
  1837. main(int argc, char *argv[]) {
  1838. int i;
  1839. for(i = 1; i < argc; i++) {
  1840. switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
  1841. case 't':
  1842. if(++i < argc) opt_title = argv[i];
  1843. break;
  1844. case 'c':
  1845. if(++i < argc) opt_class = argv[i];
  1846. break;
  1847. case 'w':
  1848. if(++i < argc) opt_embed = argv[i];
  1849. break;
  1850. case 'e':
  1851. /* eat every remaining arguments */
  1852. if(++i < argc) opt_cmd = &argv[i];
  1853. goto run;
  1854. case 'v':
  1855. default:
  1856. die(USAGE);
  1857. }
  1858. }
  1859. run:
  1860. setlocale(LC_CTYPE, "");
  1861. tnew(80, 24);
  1862. ttynew();
  1863. xinit();
  1864. selinit();
  1865. run();
  1866. return 0;
  1867. }