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