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/time.h>
  17. #include <sys/types.h>
  18. #include <sys/wait.h>
  19. #include <time.h>
  20. #include <unistd.h>
  21. #include <X11/Xatom.h>
  22. #include <X11/Xlib.h>
  23. #include <X11/Xutil.h>
  24. #include <X11/cursorfont.h>
  25. #include <X11/keysym.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 SELECT_TIMEOUT (20*1000) /* 20 ms */
  48. #define DRAW_TIMEOUT (20*1000) /* 20 ms */
  49. #define SERRNO strerror(errno)
  50. #define MIN(a, b) ((a) < (b) ? (a) : (b))
  51. #define MAX(a, b) ((a) < (b) ? (b) : (a))
  52. #define LEN(a) (sizeof(a) / sizeof(a[0]))
  53. #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
  54. #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
  55. #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  56. #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  57. #define IS_SET(flag) (term.mode & (flag))
  58. #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
  59. #define X2COL(x) (((x) - BORDER)/xw.cw)
  60. #define Y2ROW(y) (((y) - BORDER)/xw.ch)
  61. /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
  62. enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
  63. enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
  64. CURSOR_SAVE, CURSOR_LOAD };
  65. enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
  66. enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
  67. enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
  68. MODE_CRLF=16, MODE_MOUSEBTN=32, MODE_MOUSEMOTION=64, MODE_MOUSE=32|64, MODE_REVERSE=128 };
  69. enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
  70. enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
  71. #undef B0
  72. enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
  73. typedef struct {
  74. char c[UTF_SIZ]; /* character code */
  75. char mode; /* attribute flags */
  76. int fg; /* foreground */
  77. int bg; /* background */
  78. char state; /* state flags */
  79. } Glyph;
  80. typedef Glyph* Line;
  81. typedef struct {
  82. Glyph attr; /* current char attributes */
  83. int x;
  84. int y;
  85. char state;
  86. } TCursor;
  87. /* CSI Escape sequence structs */
  88. /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  89. typedef struct {
  90. char buf[ESC_BUF_SIZ]; /* raw string */
  91. int len; /* raw string length */
  92. char priv;
  93. int arg[ESC_ARG_SIZ];
  94. int narg; /* nb of args */
  95. char mode;
  96. } CSIEscape;
  97. /* Internal representation of the screen */
  98. typedef struct {
  99. int row; /* nb row */
  100. int col; /* nb col */
  101. Line* line; /* screen */
  102. Line* alt; /* alternate screen */
  103. char* dirty; /* dirtyness of lines */
  104. TCursor c; /* cursor */
  105. int top; /* top scroll limit */
  106. int bot; /* bottom scroll limit */
  107. int mode; /* terminal mode flags */
  108. int esc; /* escape state flags */
  109. char title[ESC_TITLE_SIZ];
  110. int titlelen;
  111. } Term;
  112. /* Purely graphic info */
  113. typedef struct {
  114. Display* dpy;
  115. Colormap cmap;
  116. Window win;
  117. Pixmap buf;
  118. Atom xembed;
  119. XIM xim;
  120. XIC xic;
  121. int scr;
  122. int w; /* window width */
  123. int h; /* window height */
  124. int bufw; /* pixmap width */
  125. int bufh; /* pixmap height */
  126. int ch; /* char height */
  127. int cw; /* char width */
  128. char state; /* focus, redraw, visible */
  129. struct timeval lastdraw;
  130. } XWindow;
  131. typedef struct {
  132. KeySym k;
  133. unsigned int mask;
  134. char s[ESC_BUF_SIZ];
  135. } Key;
  136. /* Drawing Context */
  137. typedef struct {
  138. unsigned long col[256];
  139. GC gc;
  140. struct {
  141. int ascent;
  142. int descent;
  143. short lbearing;
  144. short rbearing;
  145. XFontSet set;
  146. } font, bfont;
  147. } DC;
  148. /* TODO: use better name for vars... */
  149. typedef struct {
  150. int mode;
  151. int bx, by;
  152. int ex, ey;
  153. struct {int x, y;} b, e;
  154. char *clip;
  155. Atom xtarget;
  156. struct timeval tclick1;
  157. struct timeval tclick2;
  158. } Selection;
  159. #include "config.h"
  160. static void die(const char*, ...);
  161. static void draw(void);
  162. static void drawregion(int, int, int, int);
  163. static void execsh(void);
  164. static void sigchld(int);
  165. static void run(void);
  166. static int last_draw_too_old(void);
  167. static void csidump(void);
  168. static void csihandle(void);
  169. static void csiparse(void);
  170. static void csireset(void);
  171. static void tclearregion(int, int, int, int);
  172. static void tcursor(int);
  173. static void tdeletechar(int);
  174. static void tdeleteline(int);
  175. static void tinsertblank(int);
  176. static void tinsertblankline(int);
  177. static void tmoveto(int, int);
  178. static void tnew(int, int);
  179. static void tnewline(int);
  180. static void tputtab(void);
  181. static void tputc(char*);
  182. static void treset(void);
  183. static int tresize(int, int);
  184. static void tscrollup(int, int);
  185. static void tscrolldown(int, int);
  186. static void tsetattr(int*, int);
  187. static void tsetchar(char*);
  188. static void tsetscroll(int, int);
  189. static void tswapscreen(void);
  190. static void tfulldirt(void);
  191. static void ttynew(void);
  192. static void ttyread(void);
  193. static void ttyresize(int, int);
  194. static void ttywrite(const char *, size_t);
  195. static void xdraws(char *, Glyph, int, int, int, int);
  196. static void xhints(void);
  197. static void xclear(int, int, int, int);
  198. static void xcopy(int, int, int, int);
  199. static void xdrawcursor(void);
  200. static void xinit(void);
  201. static void xloadcols(void);
  202. static void xseturgency(int);
  203. static void xsetsel(char*);
  204. static void xresize(int, int);
  205. static void expose(XEvent *);
  206. static void visibility(XEvent *);
  207. static void unmap(XEvent *);
  208. static char* kmap(KeySym, unsigned int);
  209. static void kpress(XEvent *);
  210. static void cmessage(XEvent *);
  211. static void resize(XEvent *);
  212. static void focus(XEvent *);
  213. static void brelease(XEvent *);
  214. static void bpress(XEvent *);
  215. static void bmotion(XEvent *);
  216. static void selnotify(XEvent *);
  217. static void selrequest(XEvent *);
  218. static void selinit(void);
  219. static inline int selected(int, int);
  220. static void selcopy(void);
  221. static void selpaste();
  222. static void selscroll(int, int);
  223. static int utf8decode(char *, long *);
  224. static int utf8encode(long *, char *);
  225. static int utf8size(char *);
  226. static int isfullutf8(char *, int);
  227. static void (*handler[LASTEvent])(XEvent *) = {
  228. [KeyPress] = kpress,
  229. [ClientMessage] = cmessage,
  230. [ConfigureNotify] = resize,
  231. [VisibilityNotify] = visibility,
  232. [UnmapNotify] = unmap,
  233. [Expose] = expose,
  234. [FocusIn] = focus,
  235. [FocusOut] = focus,
  236. [MotionNotify] = bmotion,
  237. [ButtonPress] = bpress,
  238. [ButtonRelease] = brelease,
  239. [SelectionNotify] = selnotify,
  240. [SelectionRequest] = selrequest,
  241. };
  242. /* Globals */
  243. static DC dc;
  244. static XWindow xw;
  245. static Term term;
  246. static CSIEscape escseq;
  247. static int cmdfd;
  248. static pid_t pid;
  249. static Selection sel;
  250. static char **opt_cmd = NULL;
  251. static char *opt_title = NULL;
  252. static char *opt_embed = NULL;
  253. static char *opt_class = NULL;
  254. int
  255. utf8decode(char *s, long *u) {
  256. unsigned char c;
  257. int i, n, rtn;
  258. rtn = 1;
  259. c = *s;
  260. if(~c&B7) { /* 0xxxxxxx */
  261. *u = c;
  262. return rtn;
  263. } else if((c&(B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
  264. *u = c&(B4|B3|B2|B1|B0);
  265. n = 1;
  266. } else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
  267. *u = c&(B3|B2|B1|B0);
  268. n = 2;
  269. } else if((c&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
  270. *u = c&(B2|B1|B0);
  271. n = 3;
  272. } else
  273. goto invalid;
  274. for(i=n,++s; i>0; --i,++rtn,++s) {
  275. c = *s;
  276. if((c&(B7|B6)) != B7) /* 10xxxxxx */
  277. goto invalid;
  278. *u <<= 6;
  279. *u |= c&(B5|B4|B3|B2|B1|B0);
  280. }
  281. if((n == 1 && *u < 0x80) ||
  282. (n == 2 && *u < 0x800) ||
  283. (n == 3 && *u < 0x10000) ||
  284. (*u >= 0xD800 && *u <= 0xDFFF))
  285. goto invalid;
  286. return rtn;
  287. invalid:
  288. *u = 0xFFFD;
  289. return rtn;
  290. }
  291. int
  292. utf8encode(long *u, char *s) {
  293. unsigned char *sp;
  294. unsigned long uc;
  295. int i, n;
  296. sp = (unsigned char*) s;
  297. uc = *u;
  298. if(uc < 0x80) {
  299. *sp = uc; /* 0xxxxxxx */
  300. return 1;
  301. } else if(*u < 0x800) {
  302. *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
  303. n = 1;
  304. } else if(uc < 0x10000) {
  305. *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
  306. n = 2;
  307. } else if(uc <= 0x10FFFF) {
  308. *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
  309. n = 3;
  310. } else {
  311. goto invalid;
  312. }
  313. for(i=n,++sp; i>0; --i,++sp)
  314. *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
  315. return n+1;
  316. invalid:
  317. /* U+FFFD */
  318. *s++ = '\xEF';
  319. *s++ = '\xBF';
  320. *s = '\xBD';
  321. return 3;
  322. }
  323. /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
  324. UTF-8 otherwise return 0 */
  325. int
  326. isfullutf8(char *s, int b) {
  327. unsigned char *c1, *c2, *c3;
  328. c1 = (unsigned char *) s;
  329. c2 = (unsigned char *) ++s;
  330. c3 = (unsigned char *) ++s;
  331. if(b < 1)
  332. return 0;
  333. else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
  334. return 0;
  335. else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
  336. ((b == 1) ||
  337. ((b == 2) && (*c2&(B7|B6)) == B7)))
  338. return 0;
  339. else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
  340. ((b == 1) ||
  341. ((b == 2) && (*c2&(B7|B6)) == B7) ||
  342. ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
  343. return 0;
  344. else
  345. return 1;
  346. }
  347. int
  348. utf8size(char *s) {
  349. unsigned char c = *s;
  350. if(~c&B7)
  351. return 1;
  352. else if((c&(B7|B6|B5)) == (B7|B6))
  353. return 2;
  354. else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
  355. return 3;
  356. else
  357. return 4;
  358. }
  359. void
  360. selinit(void) {
  361. sel.tclick1.tv_sec = 0;
  362. sel.tclick1.tv_usec = 0;
  363. sel.mode = 0;
  364. sel.bx = -1;
  365. sel.clip = NULL;
  366. sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
  367. if(sel.xtarget == None)
  368. sel.xtarget = XA_STRING;
  369. }
  370. static inline int
  371. selected(int x, int y) {
  372. if(sel.ey == y && sel.by == y) {
  373. int bx = MIN(sel.bx, sel.ex);
  374. int ex = MAX(sel.bx, sel.ex);
  375. return BETWEEN(x, bx, ex);
  376. }
  377. return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
  378. || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
  379. }
  380. void
  381. getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
  382. if(b)
  383. *b = e->xbutton.button;
  384. *x = X2COL(e->xbutton.x);
  385. *y = Y2ROW(e->xbutton.y);
  386. sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
  387. sel.b.y = MIN(sel.by, sel.ey);
  388. sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
  389. sel.e.y = MAX(sel.by, sel.ey);
  390. }
  391. void
  392. mousereport(XEvent *e) {
  393. int x = X2COL(e->xbutton.x);
  394. int y = Y2ROW(e->xbutton.y);
  395. int button = e->xbutton.button;
  396. int state = e->xbutton.state;
  397. char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
  398. static int ob, ox, oy;
  399. /* from urxvt */
  400. if(e->xbutton.type == MotionNotify) {
  401. if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
  402. return;
  403. button = ob + 32;
  404. ox = x, oy = y;
  405. } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
  406. button = 3;
  407. } else {
  408. button -= Button1;
  409. if(button >= 3)
  410. button += 64 - 3;
  411. if(e->xbutton.type == ButtonPress) {
  412. ob = button;
  413. ox = x, oy = y;
  414. }
  415. }
  416. buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
  417. + (state & Mod4Mask ? 8 : 0)
  418. + (state & ControlMask ? 16 : 0);
  419. ttywrite(buf, sizeof(buf));
  420. }
  421. void
  422. bpress(XEvent *e) {
  423. if(IS_SET(MODE_MOUSE))
  424. mousereport(e);
  425. else if(e->xbutton.button == Button1) {
  426. if(sel.bx != -1)
  427. for(int i=sel.b.y; i<=sel.e.y; i++)
  428. term.dirty[i] = 1;
  429. sel.mode = 1;
  430. sel.ex = sel.bx = X2COL(e->xbutton.x);
  431. sel.ey = sel.by = Y2ROW(e->xbutton.y);
  432. }
  433. }
  434. void
  435. selcopy(void) {
  436. char *str, *ptr;
  437. int x, y, sz, sl, ls = 0;
  438. if(sel.bx == -1)
  439. str = NULL;
  440. else {
  441. sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
  442. ptr = str = malloc(sz);
  443. for(y = 0; y < term.row; y++) {
  444. for(x = 0; x < term.col; x++)
  445. if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
  446. sl = utf8size(term.line[y][x].c);
  447. memcpy(ptr, term.line[y][x].c, sl);
  448. ptr += sl;
  449. }
  450. if(ls && y < sel.e.y)
  451. *ptr++ = '\n';
  452. }
  453. *ptr = 0;
  454. }
  455. xsetsel(str);
  456. }
  457. void
  458. selnotify(XEvent *e) {
  459. unsigned long nitems, ofs, rem;
  460. int format;
  461. unsigned char *data;
  462. Atom type;
  463. ofs = 0;
  464. do {
  465. if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
  466. False, AnyPropertyType, &type, &format,
  467. &nitems, &rem, &data)) {
  468. fprintf(stderr, "Clipboard allocation failed\n");
  469. return;
  470. }
  471. ttywrite((const char *) data, nitems * format / 8);
  472. XFree(data);
  473. /* number of 32-bit chunks returned */
  474. ofs += nitems * format / 32;
  475. } while(rem > 0);
  476. }
  477. void
  478. selpaste() {
  479. XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
  480. }
  481. void
  482. selrequest(XEvent *e) {
  483. XSelectionRequestEvent *xsre;
  484. XSelectionEvent xev;
  485. Atom xa_targets;
  486. xsre = (XSelectionRequestEvent *) e;
  487. xev.type = SelectionNotify;
  488. xev.requestor = xsre->requestor;
  489. xev.selection = xsre->selection;
  490. xev.target = xsre->target;
  491. xev.time = xsre->time;
  492. /* reject */
  493. xev.property = None;
  494. xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
  495. if(xsre->target == xa_targets) {
  496. /* respond with the supported type */
  497. Atom string = sel.xtarget;
  498. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  499. XA_ATOM, 32, PropModeReplace,
  500. (unsigned char *) &string, 1);
  501. xev.property = xsre->property;
  502. } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
  503. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  504. xsre->target, 8, PropModeReplace,
  505. (unsigned char *) sel.clip, strlen(sel.clip));
  506. xev.property = xsre->property;
  507. }
  508. /* all done, send a notification to the listener */
  509. if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
  510. fprintf(stderr, "Error sending SelectionNotify event\n");
  511. }
  512. void
  513. xsetsel(char *str) {
  514. /* register the selection for both the clipboard and the primary */
  515. Atom clipboard;
  516. free(sel.clip);
  517. sel.clip = str;
  518. XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
  519. clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
  520. XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
  521. XFlush(xw.dpy);
  522. }
  523. void
  524. brelease(XEvent *e) {
  525. if(IS_SET(MODE_MOUSE)) {
  526. mousereport(e);
  527. return;
  528. }
  529. if(e->xbutton.button == Button2)
  530. selpaste();
  531. else if(e->xbutton.button == Button1) {
  532. sel.mode = 0;
  533. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  534. term.dirty[sel.ey] = 1;
  535. if(sel.bx == sel.ex && sel.by == sel.ey) {
  536. struct timeval now;
  537. sel.bx = -1;
  538. gettimeofday(&now, NULL);
  539. if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
  540. /* triple click on the line */
  541. sel.b.x = sel.bx = 0;
  542. sel.e.x = sel.ex = term.col;
  543. sel.b.y = sel.e.y = sel.ey;
  544. selcopy();
  545. } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
  546. /* double click to select word */
  547. sel.bx = sel.ex;
  548. while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
  549. term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
  550. sel.b.x = sel.bx;
  551. while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
  552. term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
  553. sel.e.x = sel.ex;
  554. sel.b.y = sel.e.y = sel.ey;
  555. selcopy();
  556. }
  557. } else
  558. selcopy();
  559. }
  560. memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
  561. gettimeofday(&sel.tclick1, NULL);
  562. draw();
  563. }
  564. void
  565. bmotion(XEvent *e) {
  566. if(IS_SET(MODE_MOUSE)) {
  567. mousereport(e);
  568. return;
  569. }
  570. if(sel.mode) {
  571. int oldey = sel.ey, oldex = sel.ex;
  572. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  573. if(oldey != sel.ey || oldex != sel.ex) {
  574. int starty = MIN(oldey, sel.ey);
  575. int endy = MAX(oldey, sel.ey);
  576. for(int i=starty; i<=endy; i++)
  577. term.dirty[i] = 1;
  578. draw();
  579. }
  580. }
  581. }
  582. void
  583. die(const char *errstr, ...) {
  584. va_list ap;
  585. va_start(ap, errstr);
  586. vfprintf(stderr, errstr, ap);
  587. va_end(ap);
  588. exit(EXIT_FAILURE);
  589. }
  590. void
  591. execsh(void) {
  592. char **args;
  593. char *envshell = getenv("SHELL");
  594. DEFAULT(envshell, "sh");
  595. putenv("TERM="TNAME);
  596. args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
  597. execvp(args[0], args);
  598. exit(EXIT_FAILURE);
  599. }
  600. void
  601. sigchld(int a) {
  602. int stat = 0;
  603. if(waitpid(pid, &stat, 0) < 0)
  604. die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
  605. if(WIFEXITED(stat))
  606. exit(WEXITSTATUS(stat));
  607. else
  608. exit(EXIT_FAILURE);
  609. }
  610. void
  611. ttynew(void) {
  612. int m, s;
  613. /* seems to work fine on linux, openbsd and freebsd */
  614. struct winsize w = {term.row, term.col, 0, 0};
  615. if(openpty(&m, &s, NULL, NULL, &w) < 0)
  616. die("openpty failed: %s\n", SERRNO);
  617. switch(pid = fork()) {
  618. case -1:
  619. die("fork failed\n");
  620. break;
  621. case 0:
  622. setsid(); /* create a new process group */
  623. dup2(s, STDIN_FILENO);
  624. dup2(s, STDOUT_FILENO);
  625. dup2(s, STDERR_FILENO);
  626. if(ioctl(s, TIOCSCTTY, NULL) < 0)
  627. die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
  628. close(s);
  629. close(m);
  630. execsh();
  631. break;
  632. default:
  633. close(s);
  634. cmdfd = m;
  635. signal(SIGCHLD, sigchld);
  636. }
  637. }
  638. void
  639. dump(char c) {
  640. static int col;
  641. fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
  642. if(++col % 10 == 0)
  643. fprintf(stderr, "\n");
  644. }
  645. void
  646. ttyread(void) {
  647. static char buf[BUFSIZ];
  648. static int buflen = 0;
  649. char *ptr;
  650. char s[UTF_SIZ];
  651. int charsize; /* size of utf8 char in bytes */
  652. long utf8c;
  653. int ret;
  654. /* append read bytes to unprocessed bytes */
  655. if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
  656. die("Couldn't read from shell: %s\n", SERRNO);
  657. /* process every complete utf8 char */
  658. buflen += ret;
  659. ptr = buf;
  660. while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
  661. charsize = utf8decode(ptr, &utf8c);
  662. utf8encode(&utf8c, s);
  663. tputc(s);
  664. ptr += charsize;
  665. buflen -= charsize;
  666. }
  667. /* keep any uncomplete utf8 char for the next call */
  668. memmove(buf, ptr, buflen);
  669. }
  670. void
  671. ttywrite(const char *s, size_t n) {
  672. if(write(cmdfd, s, n) == -1)
  673. die("write error on tty: %s\n", SERRNO);
  674. }
  675. void
  676. ttyresize(int x, int y) {
  677. struct winsize w;
  678. w.ws_row = term.row;
  679. w.ws_col = term.col;
  680. w.ws_xpixel = w.ws_ypixel = 0;
  681. if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
  682. fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
  683. }
  684. void
  685. tfulldirt(void)
  686. {
  687. int i;
  688. for(i = 0; i < term.row; i++)
  689. term.dirty[i] = 1;
  690. }
  691. void
  692. tcursor(int mode) {
  693. static TCursor c;
  694. if(mode == CURSOR_SAVE)
  695. c = term.c;
  696. else if(mode == CURSOR_LOAD)
  697. term.c = c, tmoveto(c.x, c.y);
  698. }
  699. void
  700. treset(void) {
  701. term.c = (TCursor){{
  702. .mode = ATTR_NULL,
  703. .fg = DefaultFG,
  704. .bg = DefaultBG
  705. }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
  706. term.top = 0, term.bot = term.row - 1;
  707. term.mode = MODE_WRAP;
  708. tclearregion(0, 0, term.col-1, term.row-1);
  709. }
  710. void
  711. tnew(int col, int row) {
  712. /* set screen size */
  713. term.row = row, term.col = col;
  714. term.line = malloc(term.row * sizeof(Line));
  715. term.alt = malloc(term.row * sizeof(Line));
  716. term.dirty = malloc(term.row * sizeof(*term.dirty));
  717. for(row = 0; row < term.row; row++) {
  718. term.line[row] = malloc(term.col * sizeof(Glyph));
  719. term.alt [row] = malloc(term.col * sizeof(Glyph));
  720. term.dirty[row] = 0;
  721. }
  722. /* setup screen */
  723. treset();
  724. }
  725. void
  726. tswapscreen(void) {
  727. Line* tmp = term.line;
  728. term.line = term.alt;
  729. term.alt = tmp;
  730. term.mode ^= MODE_ALTSCREEN;
  731. tfulldirt();
  732. }
  733. void
  734. tscrolldown(int orig, int n) {
  735. int i;
  736. Line temp;
  737. LIMIT(n, 0, term.bot-orig+1);
  738. tclearregion(0, term.bot-n+1, term.col-1, term.bot);
  739. for(i = term.bot; i >= orig+n; i--) {
  740. temp = term.line[i];
  741. term.line[i] = term.line[i-n];
  742. term.line[i-n] = temp;
  743. term.dirty[i] = 1;
  744. term.dirty[i-n] = 1;
  745. }
  746. selscroll(orig, n);
  747. }
  748. void
  749. tscrollup(int orig, int n) {
  750. int i;
  751. Line temp;
  752. LIMIT(n, 0, term.bot-orig+1);
  753. tclearregion(0, orig, term.col-1, orig+n-1);
  754. for(i = orig; i <= term.bot-n; i++) {
  755. temp = term.line[i];
  756. term.line[i] = term.line[i+n];
  757. term.line[i+n] = temp;
  758. term.dirty[i] = 1;
  759. term.dirty[i+n] = 1;
  760. }
  761. selscroll(orig, -n);
  762. }
  763. void
  764. selscroll(int orig, int n) {
  765. if(sel.bx == -1)
  766. return;
  767. if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
  768. if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
  769. sel.bx = -1;
  770. return;
  771. }
  772. if(sel.by < term.top) {
  773. sel.by = term.top;
  774. sel.bx = 0;
  775. }
  776. if(sel.ey > term.bot) {
  777. sel.ey = term.bot;
  778. sel.ex = term.col;
  779. }
  780. sel.b.y = sel.by, sel.b.x = sel.bx;
  781. sel.e.y = sel.ey, sel.e.x = sel.ex;
  782. }
  783. }
  784. void
  785. tnewline(int first_col) {
  786. int y = term.c.y;
  787. if(y == term.bot)
  788. tscrollup(term.top, 1);
  789. else
  790. y++;
  791. tmoveto(first_col ? 0 : term.c.x, y);
  792. }
  793. void
  794. csiparse(void) {
  795. /* int noarg = 1; */
  796. char *p = escseq.buf;
  797. escseq.narg = 0;
  798. if(*p == '?')
  799. escseq.priv = 1, p++;
  800. while(p < escseq.buf+escseq.len) {
  801. while(isdigit(*p)) {
  802. escseq.arg[escseq.narg] *= 10;
  803. escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
  804. }
  805. if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
  806. escseq.narg++, p++;
  807. else {
  808. escseq.mode = *p;
  809. escseq.narg++;
  810. return;
  811. }
  812. }
  813. }
  814. void
  815. tmoveto(int x, int y) {
  816. LIMIT(x, 0, term.col-1);
  817. LIMIT(y, 0, term.row-1);
  818. term.c.state &= ~CURSOR_WRAPNEXT;
  819. term.c.x = x;
  820. term.c.y = y;
  821. }
  822. void
  823. tsetchar(char *c) {
  824. term.dirty[term.c.y] = 1;
  825. term.line[term.c.y][term.c.x] = term.c.attr;
  826. memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
  827. term.line[term.c.y][term.c.x].state |= GLYPH_SET;
  828. }
  829. void
  830. tclearregion(int x1, int y1, int x2, int y2) {
  831. int x, y, temp;
  832. if(x1 > x2)
  833. temp = x1, x1 = x2, x2 = temp;
  834. if(y1 > y2)
  835. temp = y1, y1 = y2, y2 = temp;
  836. LIMIT(x1, 0, term.col-1);
  837. LIMIT(x2, 0, term.col-1);
  838. LIMIT(y1, 0, term.row-1);
  839. LIMIT(y2, 0, term.row-1);
  840. for(y = y1; y <= y2; y++) {
  841. term.dirty[y] = 1;
  842. for(x = x1; x <= x2; x++)
  843. term.line[y][x].state = 0;
  844. }
  845. }
  846. void
  847. tdeletechar(int n) {
  848. int src = term.c.x + n;
  849. int dst = term.c.x;
  850. int size = term.col - src;
  851. term.dirty[term.c.y] = 1;
  852. if(src >= term.col) {
  853. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  854. return;
  855. }
  856. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  857. tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
  858. }
  859. void
  860. tinsertblank(int n) {
  861. int src = term.c.x;
  862. int dst = src + n;
  863. int size = term.col - dst;
  864. term.dirty[term.c.y] = 1;
  865. if(dst >= term.col) {
  866. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  867. return;
  868. }
  869. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  870. tclearregion(src, term.c.y, dst - 1, term.c.y);
  871. }
  872. void
  873. tinsertblankline(int n) {
  874. if(term.c.y < term.top || term.c.y > term.bot)
  875. return;
  876. tscrolldown(term.c.y, n);
  877. }
  878. void
  879. tdeleteline(int n) {
  880. if(term.c.y < term.top || term.c.y > term.bot)
  881. return;
  882. tscrollup(term.c.y, n);
  883. }
  884. void
  885. tsetattr(int *attr, int l) {
  886. int i;
  887. for(i = 0; i < l; i++) {
  888. switch(attr[i]) {
  889. case 0:
  890. term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
  891. term.c.attr.fg = DefaultFG;
  892. term.c.attr.bg = DefaultBG;
  893. break;
  894. case 1:
  895. term.c.attr.mode |= ATTR_BOLD;
  896. break;
  897. case 4:
  898. term.c.attr.mode |= ATTR_UNDERLINE;
  899. break;
  900. case 7:
  901. term.c.attr.mode |= ATTR_REVERSE;
  902. break;
  903. case 22:
  904. term.c.attr.mode &= ~ATTR_BOLD;
  905. break;
  906. case 24:
  907. term.c.attr.mode &= ~ATTR_UNDERLINE;
  908. break;
  909. case 27:
  910. term.c.attr.mode &= ~ATTR_REVERSE;
  911. break;
  912. case 38:
  913. if(i + 2 < l && attr[i + 1] == 5) {
  914. i += 2;
  915. if(BETWEEN(attr[i], 0, 255))
  916. term.c.attr.fg = attr[i];
  917. else
  918. fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
  919. }
  920. else
  921. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
  922. break;
  923. case 39:
  924. term.c.attr.fg = DefaultFG;
  925. break;
  926. case 48:
  927. if(i + 2 < l && attr[i + 1] == 5) {
  928. i += 2;
  929. if(BETWEEN(attr[i], 0, 255))
  930. term.c.attr.bg = attr[i];
  931. else
  932. fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
  933. }
  934. else
  935. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
  936. break;
  937. case 49:
  938. term.c.attr.bg = DefaultBG;
  939. break;
  940. default:
  941. if(BETWEEN(attr[i], 30, 37))
  942. term.c.attr.fg = attr[i] - 30;
  943. else if(BETWEEN(attr[i], 40, 47))
  944. term.c.attr.bg = attr[i] - 40;
  945. else if(BETWEEN(attr[i], 90, 97))
  946. term.c.attr.fg = attr[i] - 90 + 8;
  947. else if(BETWEEN(attr[i], 100, 107))
  948. term.c.attr.fg = attr[i] - 100 + 8;
  949. else
  950. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
  951. break;
  952. }
  953. }
  954. }
  955. void
  956. tsetscroll(int t, int b) {
  957. int temp;
  958. LIMIT(t, 0, term.row-1);
  959. LIMIT(b, 0, term.row-1);
  960. if(t > b) {
  961. temp = t;
  962. t = b;
  963. b = temp;
  964. }
  965. term.top = t;
  966. term.bot = b;
  967. }
  968. void
  969. csihandle(void) {
  970. switch(escseq.mode) {
  971. default:
  972. unknown:
  973. fprintf(stderr, "erresc: unknown csi ");
  974. csidump();
  975. /* die(""); */
  976. break;
  977. case '@': /* ICH -- Insert <n> blank char */
  978. DEFAULT(escseq.arg[0], 1);
  979. tinsertblank(escseq.arg[0]);
  980. break;
  981. case 'A': /* CUU -- Cursor <n> Up */
  982. case 'e':
  983. DEFAULT(escseq.arg[0], 1);
  984. tmoveto(term.c.x, term.c.y-escseq.arg[0]);
  985. break;
  986. case 'B': /* CUD -- Cursor <n> Down */
  987. DEFAULT(escseq.arg[0], 1);
  988. tmoveto(term.c.x, term.c.y+escseq.arg[0]);
  989. break;
  990. case 'C': /* CUF -- Cursor <n> Forward */
  991. case 'a':
  992. DEFAULT(escseq.arg[0], 1);
  993. tmoveto(term.c.x+escseq.arg[0], term.c.y);
  994. break;
  995. case 'D': /* CUB -- Cursor <n> Backward */
  996. DEFAULT(escseq.arg[0], 1);
  997. tmoveto(term.c.x-escseq.arg[0], term.c.y);
  998. break;
  999. case 'E': /* CNL -- Cursor <n> Down and first col */
  1000. DEFAULT(escseq.arg[0], 1);
  1001. tmoveto(0, term.c.y+escseq.arg[0]);
  1002. break;
  1003. case 'F': /* CPL -- Cursor <n> Up and first col */
  1004. DEFAULT(escseq.arg[0], 1);
  1005. tmoveto(0, term.c.y-escseq.arg[0]);
  1006. break;
  1007. case 'G': /* CHA -- Move to <col> */
  1008. case '`': /* XXX: HPA -- same? */
  1009. DEFAULT(escseq.arg[0], 1);
  1010. tmoveto(escseq.arg[0]-1, term.c.y);
  1011. break;
  1012. case 'H': /* CUP -- Move to <row> <col> */
  1013. case 'f': /* XXX: HVP -- same? */
  1014. DEFAULT(escseq.arg[0], 1);
  1015. DEFAULT(escseq.arg[1], 1);
  1016. tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
  1017. break;
  1018. /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
  1019. case 'J': /* ED -- Clear screen */
  1020. sel.bx = -1;
  1021. switch(escseq.arg[0]) {
  1022. case 0: /* below */
  1023. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1024. if(term.c.y < term.row-1)
  1025. tclearregion(0, term.c.y+1, term.col-1, term.row-1);
  1026. break;
  1027. case 1: /* above */
  1028. if(term.c.y > 1)
  1029. tclearregion(0, 0, term.col-1, term.c.y-1);
  1030. tclearregion(0, term.c.y, term.c.x, term.c.y);
  1031. break;
  1032. case 2: /* all */
  1033. tclearregion(0, 0, term.col-1, term.row-1);
  1034. break;
  1035. default:
  1036. goto unknown;
  1037. }
  1038. break;
  1039. case 'K': /* EL -- Clear line */
  1040. switch(escseq.arg[0]) {
  1041. case 0: /* right */
  1042. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1043. break;
  1044. case 1: /* left */
  1045. tclearregion(0, term.c.y, term.c.x, term.c.y);
  1046. break;
  1047. case 2: /* all */
  1048. tclearregion(0, term.c.y, term.col-1, term.c.y);
  1049. break;
  1050. }
  1051. break;
  1052. case 'S': /* SU -- Scroll <n> line up */
  1053. DEFAULT(escseq.arg[0], 1);
  1054. tscrollup(term.top, escseq.arg[0]);
  1055. break;
  1056. case 'T': /* SD -- Scroll <n> line down */
  1057. DEFAULT(escseq.arg[0], 1);
  1058. tscrolldown(term.top, escseq.arg[0]);
  1059. break;
  1060. case 'L': /* IL -- Insert <n> blank lines */
  1061. DEFAULT(escseq.arg[0], 1);
  1062. tinsertblankline(escseq.arg[0]);
  1063. break;
  1064. case 'l': /* RM -- Reset Mode */
  1065. if(escseq.priv) {
  1066. switch(escseq.arg[0]) {
  1067. case 1:
  1068. term.mode &= ~MODE_APPKEYPAD;
  1069. break;
  1070. case 5: /* DECSCNM -- Remove reverse video */
  1071. if(IS_SET(MODE_REVERSE)) {
  1072. term.mode &= ~MODE_REVERSE;
  1073. draw();
  1074. }
  1075. break;
  1076. case 7:
  1077. term.mode &= ~MODE_WRAP;
  1078. break;
  1079. case 12: /* att610 -- Stop blinking cursor (IGNORED) */
  1080. break;
  1081. case 20:
  1082. term.mode &= ~MODE_CRLF;
  1083. break;
  1084. case 25:
  1085. term.c.state |= CURSOR_HIDE;
  1086. break;
  1087. case 1000: /* disable X11 xterm mouse reporting */
  1088. term.mode &= ~MODE_MOUSEBTN;
  1089. break;
  1090. case 1002:
  1091. term.mode &= ~MODE_MOUSEMOTION;
  1092. break;
  1093. case 1049: /* = 1047 and 1048 */
  1094. case 47:
  1095. case 1047:
  1096. if(IS_SET(MODE_ALTSCREEN)) {
  1097. tclearregion(0, 0, term.col-1, term.row-1);
  1098. tswapscreen();
  1099. }
  1100. if(escseq.arg[0] != 1049)
  1101. break;
  1102. case 1048:
  1103. tcursor(CURSOR_LOAD);
  1104. break;
  1105. default:
  1106. goto unknown;
  1107. }
  1108. } else {
  1109. switch(escseq.arg[0]) {
  1110. case 4:
  1111. term.mode &= ~MODE_INSERT;
  1112. break;
  1113. default:
  1114. goto unknown;
  1115. }
  1116. }
  1117. break;
  1118. case 'M': /* DL -- Delete <n> lines */
  1119. DEFAULT(escseq.arg[0], 1);
  1120. tdeleteline(escseq.arg[0]);
  1121. break;
  1122. case 'X': /* ECH -- Erase <n> char */
  1123. DEFAULT(escseq.arg[0], 1);
  1124. tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
  1125. break;
  1126. case 'P': /* DCH -- Delete <n> char */
  1127. DEFAULT(escseq.arg[0], 1);
  1128. tdeletechar(escseq.arg[0]);
  1129. break;
  1130. /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
  1131. case 'd': /* VPA -- Move to <row> */
  1132. DEFAULT(escseq.arg[0], 1);
  1133. tmoveto(term.c.x, escseq.arg[0]-1);
  1134. break;
  1135. case 'h': /* SM -- Set terminal mode */
  1136. if(escseq.priv) {
  1137. switch(escseq.arg[0]) {
  1138. case 1:
  1139. term.mode |= MODE_APPKEYPAD;
  1140. break;
  1141. case 5: /* DECSCNM -- Reverve video */
  1142. if(!IS_SET(MODE_REVERSE)) {
  1143. term.mode |= MODE_REVERSE;
  1144. draw();
  1145. }
  1146. break;
  1147. case 7:
  1148. term.mode |= MODE_WRAP;
  1149. break;
  1150. case 20:
  1151. term.mode |= MODE_CRLF;
  1152. break;
  1153. case 12: /* att610 -- Start blinking cursor (IGNORED) */
  1154. /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
  1155. if(escseq.narg > 1 && escseq.arg[1] != 25)
  1156. break;
  1157. case 25:
  1158. term.c.state &= ~CURSOR_HIDE;
  1159. break;
  1160. case 1000: /* 1000,1002: enable xterm mouse report */
  1161. term.mode |= MODE_MOUSEBTN;
  1162. break;
  1163. case 1002:
  1164. term.mode |= MODE_MOUSEMOTION;
  1165. break;
  1166. case 1049: /* = 1047 and 1048 */
  1167. case 47:
  1168. case 1047:
  1169. if(IS_SET(MODE_ALTSCREEN))
  1170. tclearregion(0, 0, term.col-1, term.row-1);
  1171. else
  1172. tswapscreen();
  1173. if(escseq.arg[0] != 1049)
  1174. break;
  1175. case 1048:
  1176. tcursor(CURSOR_SAVE);
  1177. break;
  1178. default: goto unknown;
  1179. }
  1180. } else {
  1181. switch(escseq.arg[0]) {
  1182. case 4:
  1183. term.mode |= MODE_INSERT;
  1184. break;
  1185. default: goto unknown;
  1186. }
  1187. };
  1188. break;
  1189. case 'm': /* SGR -- Terminal attribute (color) */
  1190. tsetattr(escseq.arg, escseq.narg);
  1191. break;
  1192. case 'r': /* DECSTBM -- Set Scrolling Region */
  1193. if(escseq.priv)
  1194. goto unknown;
  1195. else {
  1196. DEFAULT(escseq.arg[0], 1);
  1197. DEFAULT(escseq.arg[1], term.row);
  1198. tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
  1199. tmoveto(0, 0);
  1200. }
  1201. break;
  1202. case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
  1203. tcursor(CURSOR_SAVE);
  1204. break;
  1205. case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
  1206. tcursor(CURSOR_LOAD);
  1207. break;
  1208. }
  1209. }
  1210. void
  1211. csidump(void) {
  1212. int i;
  1213. printf("ESC [ %s", escseq.priv ? "? " : "");
  1214. if(escseq.narg)
  1215. for(i = 0; i < escseq.narg; i++)
  1216. printf("%d ", escseq.arg[i]);
  1217. if(escseq.mode)
  1218. putchar(escseq.mode);
  1219. putchar('\n');
  1220. }
  1221. void
  1222. csireset(void) {
  1223. memset(&escseq, 0, sizeof(escseq));
  1224. }
  1225. void
  1226. tputtab(void) {
  1227. int space = TAB - term.c.x % TAB;
  1228. tmoveto(term.c.x + space, term.c.y);
  1229. }
  1230. void
  1231. tputc(char *c) {
  1232. char ascii = *c;
  1233. if(term.esc & ESC_START) {
  1234. if(term.esc & ESC_CSI) {
  1235. escseq.buf[escseq.len++] = ascii;
  1236. if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
  1237. term.esc = 0;
  1238. csiparse(), csihandle();
  1239. }
  1240. /* TODO: handle other OSC */
  1241. } else if(term.esc & ESC_OSC) {
  1242. if(ascii == ';') {
  1243. term.titlelen = 0;
  1244. term.esc = ESC_START | ESC_TITLE;
  1245. }
  1246. } else if(term.esc & ESC_TITLE) {
  1247. if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
  1248. term.esc = 0;
  1249. term.title[term.titlelen] = '\0';
  1250. XStoreName(xw.dpy, xw.win, term.title);
  1251. } else {
  1252. term.title[term.titlelen++] = ascii;
  1253. }
  1254. } else if(term.esc & ESC_ALTCHARSET) {
  1255. switch(ascii) {
  1256. case '0': /* Line drawing crap */
  1257. term.c.attr.mode |= ATTR_GFX;
  1258. break;
  1259. case 'B': /* Back to regular text */
  1260. term.c.attr.mode &= ~ATTR_GFX;
  1261. break;
  1262. default:
  1263. fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
  1264. }
  1265. term.esc = 0;
  1266. } else {
  1267. switch(ascii) {
  1268. case '[':
  1269. term.esc |= ESC_CSI;
  1270. break;
  1271. case ']':
  1272. term.esc |= ESC_OSC;
  1273. break;
  1274. case '(':
  1275. term.esc |= ESC_ALTCHARSET;
  1276. break;
  1277. case 'D': /* IND -- Linefeed */
  1278. if(term.c.y == term.bot)
  1279. tscrollup(term.top, 1);
  1280. else
  1281. tmoveto(term.c.x, term.c.y+1);
  1282. term.esc = 0;
  1283. break;
  1284. case 'E': /* NEL -- Next line */
  1285. tnewline(1); /* always go to first col */
  1286. term.esc = 0;
  1287. break;
  1288. case 'M': /* RI -- Reverse index */
  1289. if(term.c.y == term.top)
  1290. tscrolldown(term.top, 1);
  1291. else
  1292. tmoveto(term.c.x, term.c.y-1);
  1293. term.esc = 0;
  1294. break;
  1295. case 'c': /* RIS -- Reset to inital state */
  1296. treset();
  1297. term.esc = 0;
  1298. break;
  1299. case '=': /* DECPAM -- Application keypad */
  1300. term.mode |= MODE_APPKEYPAD;
  1301. term.esc = 0;
  1302. break;
  1303. case '>': /* DECPNM -- Normal keypad */
  1304. term.mode &= ~MODE_APPKEYPAD;
  1305. term.esc = 0;
  1306. break;
  1307. case '7': /* DECSC -- Save Cursor */
  1308. tcursor(CURSOR_SAVE);
  1309. term.esc = 0;
  1310. break;
  1311. case '8': /* DECRC -- Restore Cursor */
  1312. tcursor(CURSOR_LOAD);
  1313. term.esc = 0;
  1314. break;
  1315. default:
  1316. fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
  1317. (unsigned char) ascii, isprint(ascii)?ascii:'.');
  1318. term.esc = 0;
  1319. }
  1320. }
  1321. } else {
  1322. if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
  1323. sel.bx = -1;
  1324. switch(ascii) {
  1325. case '\t':
  1326. tputtab();
  1327. break;
  1328. case '\b':
  1329. tmoveto(term.c.x-1, term.c.y);
  1330. break;
  1331. case '\r':
  1332. tmoveto(0, term.c.y);
  1333. break;
  1334. case '\f':
  1335. case '\v':
  1336. case '\n':
  1337. /* go to first col if the mode is set */
  1338. tnewline(IS_SET(MODE_CRLF));
  1339. break;
  1340. case '\a':
  1341. if(!(xw.state & WIN_FOCUSED))
  1342. xseturgency(1);
  1343. break;
  1344. case '\033':
  1345. csireset();
  1346. term.esc = ESC_START;
  1347. break;
  1348. default:
  1349. if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
  1350. tnewline(1); /* always go to first col */
  1351. tsetchar(c);
  1352. if(term.c.x+1 < term.col)
  1353. tmoveto(term.c.x+1, term.c.y);
  1354. else
  1355. term.c.state |= CURSOR_WRAPNEXT;
  1356. }
  1357. }
  1358. }
  1359. int
  1360. tresize(int col, int row) {
  1361. int i, x;
  1362. int minrow = MIN(row, term.row);
  1363. int mincol = MIN(col, term.col);
  1364. int slide = term.c.y - row + 1;
  1365. if(col < 1 || row < 1)
  1366. return 0;
  1367. /* free unneeded rows */
  1368. i = 0;
  1369. if(slide > 0) {
  1370. /* slide screen to keep cursor where we expect it -
  1371. * tscrollup would work here, but we can optimize to
  1372. * memmove because we're freeing the earlier lines */
  1373. for(/* i = 0 */; i < slide; i++) {
  1374. free(term.line[i]);
  1375. free(term.alt[i]);
  1376. }
  1377. memmove(term.line, term.line + slide, row * sizeof(Line));
  1378. memmove(term.alt, term.alt + slide, row * sizeof(Line));
  1379. }
  1380. for(i += row; i < term.row; i++) {
  1381. free(term.line[i]);
  1382. free(term.alt[i]);
  1383. }
  1384. /* resize to new height */
  1385. term.line = realloc(term.line, row * sizeof(Line));
  1386. term.alt = realloc(term.alt, row * sizeof(Line));
  1387. term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
  1388. /* resize each row to new width, zero-pad if needed */
  1389. for(i = 0; i < minrow; i++) {
  1390. term.dirty[i] = 1;
  1391. term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
  1392. term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
  1393. for(x = mincol; x < col; x++) {
  1394. term.line[i][x].state = 0;
  1395. term.alt[i][x].state = 0;
  1396. }
  1397. }
  1398. /* allocate any new rows */
  1399. for(/* i == minrow */; i < row; i++) {
  1400. term.dirty[i] = 1;
  1401. term.line[i] = calloc(col, sizeof(Glyph));
  1402. term.alt [i] = calloc(col, sizeof(Glyph));
  1403. }
  1404. /* update terminal size */
  1405. term.col = col, term.row = row;
  1406. /* make use of the LIMIT in tmoveto */
  1407. tmoveto(term.c.x, term.c.y);
  1408. /* reset scrolling region */
  1409. tsetscroll(0, row-1);
  1410. return (slide > 0);
  1411. }
  1412. void
  1413. xresize(int col, int row) {
  1414. Pixmap newbuf;
  1415. int oldw, oldh;
  1416. oldw = xw.bufw;
  1417. oldh = xw.bufh;
  1418. xw.bufw = MAX(1, col * xw.cw);
  1419. xw.bufh = MAX(1, row * xw.ch);
  1420. newbuf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
  1421. XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
  1422. XFreePixmap(xw.dpy, xw.buf);
  1423. XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
  1424. if(xw.bufw > oldw)
  1425. XFillRectangle(xw.dpy, newbuf, dc.gc, oldw, 0,
  1426. xw.bufw-oldw, MIN(xw.bufh, oldh));
  1427. else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
  1428. XClearArea(xw.dpy, xw.win, BORDER+xw.bufw, BORDER,
  1429. xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
  1430. False);
  1431. if(xw.bufh > oldh)
  1432. XFillRectangle(xw.dpy, newbuf, dc.gc, 0, oldh,
  1433. xw.bufw, xw.bufh-oldh);
  1434. else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
  1435. XClearArea(xw.dpy, xw.win, BORDER, BORDER+xw.bufh,
  1436. xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
  1437. False);
  1438. xw.buf = newbuf;
  1439. }
  1440. void
  1441. xloadcols(void) {
  1442. int i, r, g, b;
  1443. XColor color;
  1444. unsigned long white = WhitePixel(xw.dpy, xw.scr);
  1445. for(i = 0; i < LEN(colorname); i++) {
  1446. if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
  1447. dc.col[i] = white;
  1448. fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
  1449. } else
  1450. dc.col[i] = color.pixel;
  1451. }
  1452. /* same colors as xterm */
  1453. for(r = 0; r < 6; r++)
  1454. for(g = 0; g < 6; g++)
  1455. for(b = 0; b < 6; b++) {
  1456. color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
  1457. color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
  1458. color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
  1459. if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1460. dc.col[i] = white;
  1461. fprintf(stderr, "Could not allocate color %d\n", i);
  1462. } else
  1463. dc.col[i] = color.pixel;
  1464. i++;
  1465. }
  1466. for(r = 0; r < 24; r++, i++) {
  1467. color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
  1468. if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1469. dc.col[i] = white;
  1470. fprintf(stderr, "Could not allocate color %d\n", i);
  1471. } else
  1472. dc.col[i] = color.pixel;
  1473. }
  1474. }
  1475. void
  1476. xclear(int x1, int y1, int x2, int y2) {
  1477. XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
  1478. XFillRectangle(xw.dpy, xw.buf, dc.gc,
  1479. x1 * xw.cw, y1 * xw.ch,
  1480. (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
  1481. }
  1482. void
  1483. xhints(void) {
  1484. XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
  1485. XWMHints wm = {.flags = InputHint, .input = 1};
  1486. XSizeHints size = {
  1487. .flags = PSize | PResizeInc | PBaseSize,
  1488. .height = xw.h,
  1489. .width = xw.w,
  1490. .height_inc = xw.ch,
  1491. .width_inc = xw.cw,
  1492. .base_height = 2*BORDER,
  1493. .base_width = 2*BORDER,
  1494. };
  1495. XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
  1496. }
  1497. XFontSet
  1498. xinitfont(char *fontstr) {
  1499. XFontSet set;
  1500. char *def, **missing;
  1501. int n;
  1502. missing = NULL;
  1503. set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
  1504. if(missing) {
  1505. while(n--)
  1506. fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
  1507. XFreeStringList(missing);
  1508. }
  1509. return set;
  1510. }
  1511. void
  1512. xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
  1513. XFontStruct **xfonts;
  1514. char **font_names;
  1515. int i, n;
  1516. *ascent = *descent = *lbearing = *rbearing = 0;
  1517. n = XFontsOfFontSet(set, &xfonts, &font_names);
  1518. for(i = 0; i < n; i++) {
  1519. *ascent = MAX(*ascent, (*xfonts)->ascent);
  1520. *descent = MAX(*descent, (*xfonts)->descent);
  1521. *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
  1522. *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
  1523. xfonts++;
  1524. }
  1525. }
  1526. void
  1527. initfonts(char *fontstr, char *bfontstr) {
  1528. if((dc.font.set = xinitfont(fontstr)) == NULL ||
  1529. (dc.bfont.set = xinitfont(bfontstr)) == NULL)
  1530. die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
  1531. xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
  1532. &dc.font.lbearing, &dc.font.rbearing);
  1533. xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
  1534. &dc.bfont.lbearing, &dc.bfont.rbearing);
  1535. }
  1536. void
  1537. xinit(void) {
  1538. XSetWindowAttributes attrs;
  1539. Cursor cursor;
  1540. Window parent;
  1541. if(!(xw.dpy = XOpenDisplay(NULL)))
  1542. die("Can't open display\n");
  1543. xw.scr = XDefaultScreen(xw.dpy);
  1544. /* font */
  1545. initfonts(FONT, BOLDFONT);
  1546. /* XXX: Assuming same size for bold font */
  1547. xw.cw = dc.font.rbearing - dc.font.lbearing;
  1548. xw.ch = dc.font.ascent + dc.font.descent;
  1549. /* colors */
  1550. xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
  1551. xloadcols();
  1552. /* window - default size */
  1553. xw.bufh = term.row * xw.ch;
  1554. xw.bufw = term.col * xw.cw;
  1555. xw.h = xw.bufh + 2*BORDER;
  1556. xw.w = xw.bufw + 2*BORDER;
  1557. attrs.background_pixel = dc.col[DefaultBG];
  1558. attrs.border_pixel = dc.col[DefaultBG];
  1559. attrs.bit_gravity = NorthWestGravity;
  1560. attrs.event_mask = FocusChangeMask | KeyPressMask
  1561. | ExposureMask | VisibilityChangeMask | StructureNotifyMask
  1562. | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
  1563. | EnterWindowMask | LeaveWindowMask;
  1564. attrs.colormap = xw.cmap;
  1565. parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
  1566. xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
  1567. xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
  1568. XDefaultVisual(xw.dpy, xw.scr),
  1569. CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
  1570. | CWColormap,
  1571. &attrs);
  1572. xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
  1573. /* input methods */
  1574. xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
  1575. xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
  1576. | XIMStatusNothing, XNClientWindow, xw.win,
  1577. XNFocusWindow, xw.win, NULL);
  1578. /* gc */
  1579. dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
  1580. /* white cursor, black outline */
  1581. cursor = XCreateFontCursor(xw.dpy, XC_xterm);
  1582. XDefineCursor(xw.dpy, xw.win, cursor);
  1583. XRecolorCursor(xw.dpy, cursor,
  1584. &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
  1585. &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
  1586. xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
  1587. XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
  1588. XMapWindow(xw.dpy, xw.win);
  1589. xhints();
  1590. XSync(xw.dpy, 0);
  1591. }
  1592. void
  1593. xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
  1594. unsigned long xfg = dc.col[base.fg], xbg = dc.col[base.bg], temp;
  1595. int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
  1596. int i;
  1597. /* only switch default fg/bg if term is in RV mode */
  1598. if(IS_SET(MODE_REVERSE)) {
  1599. if(base.fg == DefaultFG)
  1600. xfg = dc.col[DefaultBG];
  1601. if(base.bg == DefaultBG)
  1602. xbg = dc.col[DefaultFG];
  1603. }
  1604. if(base.mode & ATTR_REVERSE)
  1605. temp = xfg, xfg = xbg, xbg = temp;
  1606. XSetBackground(xw.dpy, dc.gc, xbg);
  1607. XSetForeground(xw.dpy, dc.gc, xfg);
  1608. if(base.mode & ATTR_GFX) {
  1609. for(i = 0; i < bytelen; i++) {
  1610. char c = gfx[(unsigned int)s[i] % 256];
  1611. if(c)
  1612. s[i] = c;
  1613. else if(s[i] > 0x5f)
  1614. s[i] -= 0x5f;
  1615. }
  1616. }
  1617. XmbDrawImageString(xw.dpy, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
  1618. dc.gc, winx, winy, s, bytelen);
  1619. if(base.mode & ATTR_UNDERLINE)
  1620. XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
  1621. }
  1622. /* copy buffer pixmap to screen pixmap */
  1623. void
  1624. xcopy(int x, int y, int cols, int rows) {
  1625. int src_x = x*xw.cw, src_y = y*xw.ch, src_w = cols*xw.cw, src_h = rows*xw.ch;
  1626. int dst_x = BORDER+src_x, dst_y = BORDER+src_y;
  1627. XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, src_x, src_y, src_w, src_h, dst_x, dst_y);
  1628. }
  1629. void
  1630. xdrawcursor(void) {
  1631. static int oldx = 0;
  1632. static int oldy = 0;
  1633. int sl;
  1634. Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
  1635. LIMIT(oldx, 0, term.col-1);
  1636. LIMIT(oldy, 0, term.row-1);
  1637. if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
  1638. memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
  1639. /* remove the old cursor */
  1640. if(term.line[oldy][oldx].state & GLYPH_SET) {
  1641. sl = utf8size(term.line[oldy][oldx].c);
  1642. xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
  1643. } else
  1644. xclear(oldx, oldy, oldx, oldy);
  1645. xcopy(oldx, oldy, 1, 1);
  1646. /* draw the new one */
  1647. if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
  1648. sl = utf8size(g.c);
  1649. if(IS_SET(MODE_REVERSE))
  1650. g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
  1651. xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
  1652. oldx = term.c.x, oldy = term.c.y;
  1653. }
  1654. xcopy(term.c.x, term.c.y, 1, 1);
  1655. }
  1656. void
  1657. draw() {
  1658. drawregion(0, 0, term.col, term.row);
  1659. gettimeofday(&xw.lastdraw, NULL);
  1660. }
  1661. void
  1662. drawregion(int x1, int y1, int x2, int y2) {
  1663. int ic, ib, x, y, ox, sl;
  1664. Glyph base, new;
  1665. char buf[DRAW_BUF_SIZ];
  1666. if(!(xw.state & WIN_VISIBLE))
  1667. return;
  1668. for(y = y1; y < y2; y++) {
  1669. if(!term.dirty[y])
  1670. continue;
  1671. xclear(0, y, term.col, y);
  1672. term.dirty[y] = 0;
  1673. base = term.line[y][0];
  1674. ic = ib = ox = 0;
  1675. for(x = x1; x < x2; x++) {
  1676. new = term.line[y][x];
  1677. if(sel.bx != -1 && *(new.c) && selected(x, y))
  1678. new.mode ^= ATTR_REVERSE;
  1679. if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
  1680. ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
  1681. xdraws(buf, base, ox, y, ic, ib);
  1682. ic = ib = 0;
  1683. }
  1684. if(new.state & GLYPH_SET) {
  1685. if(ib == 0) {
  1686. ox = x;
  1687. base = new;
  1688. }
  1689. sl = utf8size(new.c);
  1690. memcpy(buf+ib, new.c, sl);
  1691. ib += sl;
  1692. ++ic;
  1693. }
  1694. }
  1695. if(ib > 0)
  1696. xdraws(buf, base, ox, y, ic, ib);
  1697. xcopy(0, y, term.col, 1);
  1698. }
  1699. xdrawcursor();
  1700. }
  1701. void
  1702. expose(XEvent *ev) {
  1703. XExposeEvent *e = &ev->xexpose;
  1704. if(xw.state & WIN_REDRAW) {
  1705. if(!e->count) {
  1706. xw.state &= ~WIN_REDRAW;
  1707. xcopy(0, 0, term.col, term.row);
  1708. }
  1709. } else
  1710. XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
  1711. e->width, e->height, e->x, e->y);
  1712. }
  1713. void
  1714. visibility(XEvent *ev) {
  1715. XVisibilityEvent *e = &ev->xvisibility;
  1716. if(e->state == VisibilityFullyObscured)
  1717. xw.state &= ~WIN_VISIBLE;
  1718. else if(!(xw.state & WIN_VISIBLE))
  1719. /* need a full redraw for next Expose, not just a buf copy */
  1720. xw.state |= WIN_VISIBLE | WIN_REDRAW;
  1721. }
  1722. void
  1723. unmap(XEvent *ev) {
  1724. xw.state &= ~WIN_VISIBLE;
  1725. }
  1726. void
  1727. xseturgency(int add) {
  1728. XWMHints *h = XGetWMHints(xw.dpy, xw.win);
  1729. h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
  1730. XSetWMHints(xw.dpy, xw.win, h);
  1731. XFree(h);
  1732. }
  1733. void
  1734. focus(XEvent *ev) {
  1735. if(ev->type == FocusIn) {
  1736. xw.state |= WIN_FOCUSED;
  1737. xseturgency(0);
  1738. } else
  1739. xw.state &= ~WIN_FOCUSED;
  1740. draw();
  1741. }
  1742. char*
  1743. kmap(KeySym k, unsigned int state) {
  1744. int i;
  1745. state &= ~Mod2Mask;
  1746. for(i = 0; i < LEN(key); i++) {
  1747. unsigned int mask = key[i].mask;
  1748. if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
  1749. return (char*)key[i].s;
  1750. }
  1751. return NULL;
  1752. }
  1753. void
  1754. kpress(XEvent *ev) {
  1755. XKeyEvent *e = &ev->xkey;
  1756. KeySym ksym;
  1757. char buf[32];
  1758. char *customkey;
  1759. int len;
  1760. int meta;
  1761. int shift;
  1762. Status status;
  1763. meta = e->state & Mod1Mask;
  1764. shift = e->state & ShiftMask;
  1765. len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
  1766. /* 1. custom keys from config.h */
  1767. if((customkey = kmap(ksym, e->state)))
  1768. ttywrite(customkey, strlen(customkey));
  1769. /* 2. hardcoded (overrides X lookup) */
  1770. else
  1771. switch(ksym) {
  1772. case XK_Up:
  1773. case XK_Down:
  1774. case XK_Left:
  1775. case XK_Right:
  1776. /* XXX: shift up/down doesn't work */
  1777. sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
  1778. ttywrite(buf, 3);
  1779. break;
  1780. case XK_Insert:
  1781. if(shift)
  1782. selpaste();
  1783. break;
  1784. case XK_Return:
  1785. if(IS_SET(MODE_CRLF))
  1786. ttywrite("\r\n", 2);
  1787. else
  1788. ttywrite("\r", 1);
  1789. break;
  1790. /* 3. X lookup */
  1791. default:
  1792. if(len > 0) {
  1793. if(meta && len == 1)
  1794. ttywrite("\033", 1);
  1795. ttywrite(buf, len);
  1796. }
  1797. break;
  1798. }
  1799. }
  1800. void
  1801. cmessage(XEvent *e) {
  1802. /* See xembed specs
  1803. http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
  1804. if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
  1805. if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
  1806. xw.state |= WIN_FOCUSED;
  1807. xseturgency(0);
  1808. } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
  1809. xw.state &= ~WIN_FOCUSED;
  1810. }
  1811. draw();
  1812. }
  1813. }
  1814. void
  1815. resize(XEvent *e) {
  1816. int col, row;
  1817. if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
  1818. return;
  1819. xw.w = e->xconfigure.width;
  1820. xw.h = e->xconfigure.height;
  1821. col = (xw.w - 2*BORDER) / xw.cw;
  1822. row = (xw.h - 2*BORDER) / xw.ch;
  1823. if(col == term.col && row == term.row)
  1824. return;
  1825. if(tresize(col, row))
  1826. draw();
  1827. ttyresize(col, row);
  1828. xresize(col, row);
  1829. }
  1830. int
  1831. last_draw_too_old(void) {
  1832. struct timeval now;
  1833. gettimeofday(&now, NULL);
  1834. return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
  1835. }
  1836. void
  1837. run(void) {
  1838. XEvent ev;
  1839. fd_set rfd;
  1840. int xfd = XConnectionNumber(xw.dpy);
  1841. struct timeval timeout = {0};
  1842. int stuff_to_print = 0;
  1843. for(;;) {
  1844. FD_ZERO(&rfd);
  1845. FD_SET(cmdfd, &rfd);
  1846. FD_SET(xfd, &rfd);
  1847. timeout.tv_sec = 0;
  1848. timeout.tv_usec = SELECT_TIMEOUT;
  1849. if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
  1850. if(errno == EINTR)
  1851. continue;
  1852. die("select failed: %s\n", SERRNO);
  1853. }
  1854. if(FD_ISSET(cmdfd, &rfd)) {
  1855. ttyread();
  1856. stuff_to_print = 1;
  1857. }
  1858. if(stuff_to_print && last_draw_too_old()) {
  1859. stuff_to_print = 0;
  1860. draw();
  1861. }
  1862. while(XPending(xw.dpy)) {
  1863. XNextEvent(xw.dpy, &ev);
  1864. if(XFilterEvent(&ev, xw.win))
  1865. continue;
  1866. if(handler[ev.type])
  1867. (handler[ev.type])(&ev);
  1868. }
  1869. }
  1870. }
  1871. int
  1872. main(int argc, char *argv[]) {
  1873. int i;
  1874. for(i = 1; i < argc; i++) {
  1875. switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
  1876. case 't':
  1877. if(++i < argc) opt_title = argv[i];
  1878. break;
  1879. case 'c':
  1880. if(++i < argc) opt_class = argv[i];
  1881. break;
  1882. case 'w':
  1883. if(++i < argc) opt_embed = argv[i];
  1884. break;
  1885. case 'e':
  1886. /* eat every remaining arguments */
  1887. if(++i < argc) opt_cmd = &argv[i];
  1888. goto run;
  1889. case 'v':
  1890. default:
  1891. die(USAGE);
  1892. }
  1893. }
  1894. run:
  1895. setlocale(LC_CTYPE, "");
  1896. tnew(80, 24);
  1897. ttynew();
  1898. xinit();
  1899. selinit();
  1900. run();
  1901. return 0;
  1902. }