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 <stdbool.h>
  10. #include <stdio.h>
  11. #include <stdlib.h>
  12. #include <string.h>
  13. #include <signal.h>
  14. #include <sys/ioctl.h>
  15. #include <sys/select.h>
  16. #include <sys/stat.h>
  17. #include <sys/time.h>
  18. #include <sys/types.h>
  19. #include <sys/wait.h>
  20. #include <time.h>
  21. #include <unistd.h>
  22. #include <X11/Xatom.h>
  23. #include <X11/Xlib.h>
  24. #include <X11/Xutil.h>
  25. #include <X11/cursorfont.h>
  26. #include <X11/keysym.h>
  27. #if defined(__linux)
  28. #include <pty.h>
  29. #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  30. #include <util.h>
  31. #elif defined(__FreeBSD__) || defined(__DragonFly__)
  32. #include <libutil.h>
  33. #endif
  34. #define USAGE \
  35. "st " VERSION " (c) 2010-2012 st engineers\n" \
  36. "usage: st [-t title] [-c class] [-w windowid] [-v] [-e command...]\n"
  37. /* XEMBED messages */
  38. #define XEMBED_FOCUS_IN 4
  39. #define XEMBED_FOCUS_OUT 5
  40. /* Arbitrary sizes */
  41. #define ESC_TITLE_SIZ 256
  42. #define ESC_BUF_SIZ 256
  43. #define ESC_ARG_SIZ 16
  44. #define DRAW_BUF_SIZ 1024
  45. #define UTF_SIZ 4
  46. #define XK_NO_MOD UINT_MAX
  47. #define XK_ANY_MOD 0
  48. #define SELECT_TIMEOUT (20*1000) /* 20 ms */
  49. #define DRAW_TIMEOUT (20*1000) /* 20 ms */
  50. #define SERRNO strerror(errno)
  51. #define MIN(a, b) ((a) < (b) ? (a) : (b))
  52. #define MAX(a, b) ((a) < (b) ? (b) : (a))
  53. #define LEN(a) (sizeof(a) / sizeof(a[0]))
  54. #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
  55. #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
  56. #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  57. #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  58. #define IS_SET(flag) (term.mode & (flag))
  59. #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
  60. #define X2COL(x) (((x) - BORDER)/xw.cw)
  61. #define Y2ROW(y) (((y) - BORDER)/xw.ch)
  62. /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
  63. enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
  64. enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
  65. CURSOR_SAVE, CURSOR_LOAD };
  66. enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
  67. enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
  68. enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
  69. MODE_CRLF=16, MODE_MOUSEBTN=32, MODE_MOUSEMOTION=64, MODE_MOUSE=32|64, MODE_REVERSE=128 };
  70. enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
  71. enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
  72. #undef B0
  73. enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
  74. typedef unsigned char uchar;
  75. typedef unsigned int uint;
  76. typedef unsigned long ulong;
  77. typedef struct {
  78. char c[UTF_SIZ]; /* character code */
  79. uchar mode; /* attribute flags */
  80. uchar fg; /* foreground */
  81. uchar bg; /* background */
  82. uchar state; /* state flags */
  83. } Glyph;
  84. typedef Glyph* Line;
  85. typedef struct {
  86. Glyph attr; /* current char attributes */
  87. int x;
  88. int y;
  89. char state;
  90. } TCursor;
  91. /* CSI Escape sequence structs */
  92. /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  93. typedef struct {
  94. char buf[ESC_BUF_SIZ]; /* raw string */
  95. int len; /* raw string length */
  96. char priv;
  97. int arg[ESC_ARG_SIZ];
  98. int narg; /* nb of args */
  99. char mode;
  100. } CSIEscape;
  101. /* Internal representation of the screen */
  102. typedef struct {
  103. int row; /* nb row */
  104. int col; /* nb col */
  105. Line* line; /* screen */
  106. Line* alt; /* alternate screen */
  107. bool* dirty; /* dirtyness of lines */
  108. TCursor c; /* cursor */
  109. int top; /* top scroll limit */
  110. int bot; /* bottom scroll limit */
  111. int mode; /* terminal mode flags */
  112. int esc; /* escape state flags */
  113. char title[ESC_TITLE_SIZ];
  114. int titlelen;
  115. } Term;
  116. /* Purely graphic info */
  117. typedef struct {
  118. Display* dpy;
  119. Colormap cmap;
  120. Window win;
  121. Pixmap buf;
  122. Atom xembed;
  123. XIM xim;
  124. XIC xic;
  125. int scr;
  126. int w; /* window width */
  127. int h; /* window height */
  128. int bufw; /* pixmap width */
  129. int bufh; /* pixmap height */
  130. int ch; /* char height */
  131. int cw; /* char width */
  132. char state; /* focus, redraw, visible */
  133. struct timeval lastdraw;
  134. } XWindow;
  135. typedef struct {
  136. KeySym k;
  137. uint mask;
  138. char s[ESC_BUF_SIZ];
  139. } Key;
  140. /* Drawing Context */
  141. typedef struct {
  142. ulong col[256];
  143. GC gc;
  144. struct {
  145. int ascent;
  146. int descent;
  147. short lbearing;
  148. short rbearing;
  149. XFontSet set;
  150. } font, bfont;
  151. } DC;
  152. /* TODO: use better name for vars... */
  153. typedef struct {
  154. int mode;
  155. int bx, by;
  156. int ex, ey;
  157. struct {int x, y;} b, e;
  158. char *clip;
  159. Atom xtarget;
  160. struct timeval tclick1;
  161. struct timeval tclick2;
  162. } Selection;
  163. #include "config.h"
  164. static void die(const char*, ...);
  165. static void draw(void);
  166. static void drawregion(int, int, int, int);
  167. static void execsh(void);
  168. static void sigchld(int);
  169. static void run(void);
  170. static bool last_draw_too_old(void);
  171. static void csidump(void);
  172. static void csihandle(void);
  173. static void csiparse(void);
  174. static void csireset(void);
  175. static void tclearregion(int, int, int, int);
  176. static void tcursor(int);
  177. static void tdeletechar(int);
  178. static void tdeleteline(int);
  179. static void tinsertblank(int);
  180. static void tinsertblankline(int);
  181. static void tmoveto(int, int);
  182. static void tnew(int, int);
  183. static void tnewline(int);
  184. static void tputtab(void);
  185. static void tputc(char*);
  186. static void treset(void);
  187. static int tresize(int, int);
  188. static void tscrollup(int, int);
  189. static void tscrolldown(int, int);
  190. static void tsetattr(int*, int);
  191. static void tsetchar(char*);
  192. static void tsetscroll(int, int);
  193. static void tswapscreen(void);
  194. static void tfulldirt(void);
  195. static void ttynew(void);
  196. static void ttyread(void);
  197. static void ttyresize(int, int);
  198. static void ttywrite(const char *, size_t);
  199. static void xdraws(char *, Glyph, int, int, int, int);
  200. static void xhints(void);
  201. static void xclear(int, int, int, int);
  202. static void xcopy(int, int, int, int);
  203. static void xdrawcursor(void);
  204. static void xinit(void);
  205. static void xloadcols(void);
  206. static void xseturgency(int);
  207. static void xsetsel(char*);
  208. static void xresize(int, int);
  209. static void expose(XEvent *);
  210. static void visibility(XEvent *);
  211. static void unmap(XEvent *);
  212. static char* kmap(KeySym, uint);
  213. static void kpress(XEvent *);
  214. static void cmessage(XEvent *);
  215. static void resize(XEvent *);
  216. static void focus(XEvent *);
  217. static void brelease(XEvent *);
  218. static void bpress(XEvent *);
  219. static void bmotion(XEvent *);
  220. static void selnotify(XEvent *);
  221. static void selrequest(XEvent *);
  222. static void selinit(void);
  223. static inline bool selected(int, int);
  224. static void selcopy(void);
  225. static void selpaste();
  226. static void selscroll(int, int);
  227. static int utf8decode(char *, long *);
  228. static int utf8encode(long *, char *);
  229. static int utf8size(char *);
  230. static int isfullutf8(char *, int);
  231. static void (*handler[LASTEvent])(XEvent *) = {
  232. [KeyPress] = kpress,
  233. [ClientMessage] = cmessage,
  234. [ConfigureNotify] = resize,
  235. [VisibilityNotify] = visibility,
  236. [UnmapNotify] = unmap,
  237. [Expose] = expose,
  238. [FocusIn] = focus,
  239. [FocusOut] = focus,
  240. [MotionNotify] = bmotion,
  241. [ButtonPress] = bpress,
  242. [ButtonRelease] = brelease,
  243. [SelectionNotify] = selnotify,
  244. [SelectionRequest] = selrequest,
  245. };
  246. /* Globals */
  247. static DC dc;
  248. static XWindow xw;
  249. static Term term;
  250. static CSIEscape escseq;
  251. static int cmdfd;
  252. static pid_t pid;
  253. static Selection sel;
  254. static char **opt_cmd = NULL;
  255. static char *opt_title = NULL;
  256. static char *opt_embed = NULL;
  257. static char *opt_class = NULL;
  258. int
  259. utf8decode(char *s, long *u) {
  260. uchar c;
  261. int i, n, rtn;
  262. rtn = 1;
  263. c = *s;
  264. if(~c & B7) { /* 0xxxxxxx */
  265. *u = c;
  266. return rtn;
  267. } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
  268. *u = c&(B4|B3|B2|B1|B0);
  269. n = 1;
  270. } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
  271. *u = c&(B3|B2|B1|B0);
  272. n = 2;
  273. } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
  274. *u = c & (B2|B1|B0);
  275. n = 3;
  276. } else
  277. goto invalid;
  278. for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
  279. c = *s;
  280. if((c & (B7|B6)) != B7) /* 10xxxxxx */
  281. goto invalid;
  282. *u <<= 6;
  283. *u |= c & (B5|B4|B3|B2|B1|B0);
  284. }
  285. if((n == 1 && *u < 0x80) ||
  286. (n == 2 && *u < 0x800) ||
  287. (n == 3 && *u < 0x10000) ||
  288. (*u >= 0xD800 && *u <= 0xDFFF))
  289. goto invalid;
  290. return rtn;
  291. invalid:
  292. *u = 0xFFFD;
  293. return rtn;
  294. }
  295. int
  296. utf8encode(long *u, char *s) {
  297. uchar *sp;
  298. ulong uc;
  299. int i, n;
  300. sp = (uchar*) s;
  301. uc = *u;
  302. if(uc < 0x80) {
  303. *sp = uc; /* 0xxxxxxx */
  304. return 1;
  305. } else if(*u < 0x800) {
  306. *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
  307. n = 1;
  308. } else if(uc < 0x10000) {
  309. *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
  310. n = 2;
  311. } else if(uc <= 0x10FFFF) {
  312. *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
  313. n = 3;
  314. } else {
  315. goto invalid;
  316. }
  317. for(i=n,++sp; i>0; --i,++sp)
  318. *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
  319. return n+1;
  320. invalid:
  321. /* U+FFFD */
  322. *s++ = '\xEF';
  323. *s++ = '\xBF';
  324. *s = '\xBD';
  325. return 3;
  326. }
  327. /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
  328. UTF-8 otherwise return 0 */
  329. int
  330. isfullutf8(char *s, int b) {
  331. uchar *c1, *c2, *c3;
  332. c1 = (uchar *) s;
  333. c2 = (uchar *) ++s;
  334. c3 = (uchar *) ++s;
  335. if(b < 1)
  336. return 0;
  337. else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
  338. return 0;
  339. else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
  340. ((b == 1) ||
  341. ((b == 2) && (*c2&(B7|B6)) == B7)))
  342. return 0;
  343. else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
  344. ((b == 1) ||
  345. ((b == 2) && (*c2&(B7|B6)) == B7) ||
  346. ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
  347. return 0;
  348. else
  349. return 1;
  350. }
  351. int
  352. utf8size(char *s) {
  353. uchar c = *s;
  354. if(~c&B7)
  355. return 1;
  356. else if((c&(B7|B6|B5)) == (B7|B6))
  357. return 2;
  358. else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
  359. return 3;
  360. else
  361. return 4;
  362. }
  363. void
  364. selinit(void) {
  365. sel.tclick1.tv_sec = 0;
  366. sel.tclick1.tv_usec = 0;
  367. sel.mode = 0;
  368. sel.bx = -1;
  369. sel.clip = NULL;
  370. sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
  371. if(sel.xtarget == None)
  372. sel.xtarget = XA_STRING;
  373. }
  374. static inline bool
  375. selected(int x, int y) {
  376. if(sel.ey == y && sel.by == y) {
  377. int bx = MIN(sel.bx, sel.ex);
  378. int ex = MAX(sel.bx, sel.ex);
  379. return BETWEEN(x, bx, ex);
  380. }
  381. return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
  382. || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
  383. }
  384. void
  385. getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
  386. if(b)
  387. *b = e->xbutton.button;
  388. *x = X2COL(e->xbutton.x);
  389. *y = Y2ROW(e->xbutton.y);
  390. sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
  391. sel.b.y = MIN(sel.by, sel.ey);
  392. sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
  393. sel.e.y = MAX(sel.by, sel.ey);
  394. }
  395. void
  396. mousereport(XEvent *e) {
  397. int x = X2COL(e->xbutton.x);
  398. int y = Y2ROW(e->xbutton.y);
  399. int button = e->xbutton.button;
  400. int state = e->xbutton.state;
  401. char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
  402. static int ob, ox, oy;
  403. /* from urxvt */
  404. if(e->xbutton.type == MotionNotify) {
  405. if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
  406. return;
  407. button = ob + 32;
  408. ox = x, oy = y;
  409. } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
  410. button = 3;
  411. } else {
  412. button -= Button1;
  413. if(button >= 3)
  414. button += 64 - 3;
  415. if(e->xbutton.type == ButtonPress) {
  416. ob = button;
  417. ox = x, oy = y;
  418. }
  419. }
  420. buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
  421. + (state & Mod4Mask ? 8 : 0)
  422. + (state & ControlMask ? 16 : 0);
  423. ttywrite(buf, sizeof(buf));
  424. }
  425. void
  426. bpress(XEvent *e) {
  427. if(IS_SET(MODE_MOUSE))
  428. mousereport(e);
  429. else if(e->xbutton.button == Button1) {
  430. if(sel.bx != -1)
  431. for(int i=sel.b.y; i<=sel.e.y; i++)
  432. term.dirty[i] = 1;
  433. sel.mode = 1;
  434. sel.ex = sel.bx = X2COL(e->xbutton.x);
  435. sel.ey = sel.by = Y2ROW(e->xbutton.y);
  436. }
  437. }
  438. void
  439. selcopy(void) {
  440. char *str, *ptr;
  441. int x, y, sz, sl, ls = 0;
  442. if(sel.bx == -1)
  443. str = NULL;
  444. else {
  445. sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
  446. ptr = str = malloc(sz);
  447. for(y = 0; y < term.row; y++) {
  448. for(x = 0; x < term.col; x++)
  449. if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
  450. sl = utf8size(term.line[y][x].c);
  451. memcpy(ptr, term.line[y][x].c, sl);
  452. ptr += sl;
  453. }
  454. if(ls && y < sel.e.y)
  455. *ptr++ = '\n';
  456. }
  457. *ptr = 0;
  458. }
  459. xsetsel(str);
  460. }
  461. void
  462. selnotify(XEvent *e) {
  463. ulong nitems, ofs, rem;
  464. int format;
  465. uchar *data;
  466. Atom type;
  467. ofs = 0;
  468. do {
  469. if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
  470. False, AnyPropertyType, &type, &format,
  471. &nitems, &rem, &data)) {
  472. fprintf(stderr, "Clipboard allocation failed\n");
  473. return;
  474. }
  475. ttywrite((const char *) data, nitems * format / 8);
  476. XFree(data);
  477. /* number of 32-bit chunks returned */
  478. ofs += nitems * format / 32;
  479. } while(rem > 0);
  480. }
  481. void
  482. selpaste() {
  483. XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
  484. }
  485. void
  486. selrequest(XEvent *e) {
  487. XSelectionRequestEvent *xsre;
  488. XSelectionEvent xev;
  489. Atom xa_targets;
  490. xsre = (XSelectionRequestEvent *) e;
  491. xev.type = SelectionNotify;
  492. xev.requestor = xsre->requestor;
  493. xev.selection = xsre->selection;
  494. xev.target = xsre->target;
  495. xev.time = xsre->time;
  496. /* reject */
  497. xev.property = None;
  498. xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
  499. if(xsre->target == xa_targets) {
  500. /* respond with the supported type */
  501. Atom string = sel.xtarget;
  502. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  503. XA_ATOM, 32, PropModeReplace,
  504. (uchar *) &string, 1);
  505. xev.property = xsre->property;
  506. } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
  507. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  508. xsre->target, 8, PropModeReplace,
  509. (uchar *) sel.clip, strlen(sel.clip));
  510. xev.property = xsre->property;
  511. }
  512. /* all done, send a notification to the listener */
  513. if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
  514. fprintf(stderr, "Error sending SelectionNotify event\n");
  515. }
  516. void
  517. xsetsel(char *str) {
  518. /* register the selection for both the clipboard and the primary */
  519. Atom clipboard;
  520. free(sel.clip);
  521. sel.clip = str;
  522. XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
  523. clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
  524. XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
  525. XFlush(xw.dpy);
  526. }
  527. void
  528. brelease(XEvent *e) {
  529. if(IS_SET(MODE_MOUSE)) {
  530. mousereport(e);
  531. return;
  532. }
  533. if(e->xbutton.button == Button2)
  534. selpaste();
  535. else if(e->xbutton.button == Button1) {
  536. sel.mode = 0;
  537. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  538. term.dirty[sel.ey] = 1;
  539. if(sel.bx == sel.ex && sel.by == sel.ey) {
  540. struct timeval now;
  541. sel.bx = -1;
  542. gettimeofday(&now, NULL);
  543. if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
  544. /* triple click on the line */
  545. sel.b.x = sel.bx = 0;
  546. sel.e.x = sel.ex = term.col;
  547. sel.b.y = sel.e.y = sel.ey;
  548. selcopy();
  549. } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
  550. /* double click to select word */
  551. sel.bx = sel.ex;
  552. while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
  553. term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
  554. sel.b.x = sel.bx;
  555. while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
  556. term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
  557. sel.e.x = sel.ex;
  558. sel.b.y = sel.e.y = sel.ey;
  559. selcopy();
  560. }
  561. } else
  562. selcopy();
  563. }
  564. memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
  565. gettimeofday(&sel.tclick1, NULL);
  566. draw();
  567. }
  568. void
  569. bmotion(XEvent *e) {
  570. if(IS_SET(MODE_MOUSE)) {
  571. mousereport(e);
  572. return;
  573. }
  574. if(sel.mode) {
  575. int oldey = sel.ey, oldex = sel.ex;
  576. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  577. if(oldey != sel.ey || oldex != sel.ex) {
  578. int starty = MIN(oldey, sel.ey);
  579. int endy = MAX(oldey, sel.ey);
  580. for(int i = starty; i <= endy; i++)
  581. term.dirty[i] = 1;
  582. draw();
  583. }
  584. }
  585. }
  586. void
  587. die(const char *errstr, ...) {
  588. va_list ap;
  589. va_start(ap, errstr);
  590. vfprintf(stderr, errstr, ap);
  591. va_end(ap);
  592. exit(EXIT_FAILURE);
  593. }
  594. void
  595. execsh(void) {
  596. char **args;
  597. char *envshell = getenv("SHELL");
  598. DEFAULT(envshell, "sh");
  599. putenv("TERM="TNAME);
  600. args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
  601. execvp(args[0], args);
  602. exit(EXIT_FAILURE);
  603. }
  604. void
  605. sigchld(int a) {
  606. int stat = 0;
  607. if(waitpid(pid, &stat, 0) < 0)
  608. die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
  609. if(WIFEXITED(stat))
  610. exit(WEXITSTATUS(stat));
  611. else
  612. exit(EXIT_FAILURE);
  613. }
  614. void
  615. ttynew(void) {
  616. int m, s;
  617. /* seems to work fine on linux, openbsd and freebsd */
  618. struct winsize w = {term.row, term.col, 0, 0};
  619. if(openpty(&m, &s, NULL, NULL, &w) < 0)
  620. die("openpty failed: %s\n", SERRNO);
  621. switch(pid = fork()) {
  622. case -1:
  623. die("fork failed\n");
  624. break;
  625. case 0:
  626. setsid(); /* create a new process group */
  627. dup2(s, STDIN_FILENO);
  628. dup2(s, STDOUT_FILENO);
  629. dup2(s, STDERR_FILENO);
  630. if(ioctl(s, TIOCSCTTY, NULL) < 0)
  631. die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
  632. close(s);
  633. close(m);
  634. execsh();
  635. break;
  636. default:
  637. close(s);
  638. cmdfd = m;
  639. signal(SIGCHLD, sigchld);
  640. }
  641. }
  642. void
  643. dump(char c) {
  644. static int col;
  645. fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
  646. if(++col % 10 == 0)
  647. fprintf(stderr, "\n");
  648. }
  649. void
  650. ttyread(void) {
  651. static char buf[BUFSIZ];
  652. static int buflen = 0;
  653. char *ptr;
  654. char s[UTF_SIZ];
  655. int charsize; /* size of utf8 char in bytes */
  656. long utf8c;
  657. int ret;
  658. /* append read bytes to unprocessed bytes */
  659. if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
  660. die("Couldn't read from shell: %s\n", SERRNO);
  661. /* process every complete utf8 char */
  662. buflen += ret;
  663. ptr = buf;
  664. while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
  665. charsize = utf8decode(ptr, &utf8c);
  666. utf8encode(&utf8c, s);
  667. tputc(s);
  668. ptr += charsize;
  669. buflen -= charsize;
  670. }
  671. /* keep any uncomplete utf8 char for the next call */
  672. memmove(buf, ptr, buflen);
  673. }
  674. void
  675. ttywrite(const char *s, size_t n) {
  676. if(write(cmdfd, s, n) == -1)
  677. die("write error on tty: %s\n", SERRNO);
  678. }
  679. void
  680. ttyresize(int x, int y) {
  681. struct winsize w;
  682. w.ws_row = term.row;
  683. w.ws_col = term.col;
  684. w.ws_xpixel = w.ws_ypixel = 0;
  685. if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
  686. fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
  687. }
  688. void
  689. tfulldirt(void)
  690. {
  691. int i;
  692. for(i = 0; i < term.row; i++)
  693. term.dirty[i] = 1;
  694. }
  695. void
  696. tcursor(int mode) {
  697. static TCursor c;
  698. if(mode == CURSOR_SAVE)
  699. c = term.c;
  700. else if(mode == CURSOR_LOAD)
  701. term.c = c, tmoveto(c.x, c.y);
  702. }
  703. void
  704. treset(void) {
  705. term.c = (TCursor){{
  706. .mode = ATTR_NULL,
  707. .fg = DefaultFG,
  708. .bg = DefaultBG
  709. }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
  710. term.top = 0, term.bot = term.row - 1;
  711. term.mode = MODE_WRAP;
  712. tclearregion(0, 0, term.col-1, term.row-1);
  713. }
  714. void
  715. tnew(int col, int row) {
  716. /* set screen size */
  717. term.row = row, term.col = col;
  718. term.line = malloc(term.row * sizeof(Line));
  719. term.alt = malloc(term.row * sizeof(Line));
  720. term.dirty = malloc(term.row * sizeof(*term.dirty));
  721. for(row = 0; row < term.row; row++) {
  722. term.line[row] = malloc(term.col * sizeof(Glyph));
  723. term.alt [row] = malloc(term.col * sizeof(Glyph));
  724. term.dirty[row] = 0;
  725. }
  726. /* setup screen */
  727. treset();
  728. }
  729. void
  730. tswapscreen(void) {
  731. Line* tmp = term.line;
  732. term.line = term.alt;
  733. term.alt = tmp;
  734. term.mode ^= MODE_ALTSCREEN;
  735. tfulldirt();
  736. }
  737. void
  738. tscrolldown(int orig, int n) {
  739. int i;
  740. Line temp;
  741. LIMIT(n, 0, term.bot-orig+1);
  742. tclearregion(0, term.bot-n+1, term.col-1, term.bot);
  743. for(i = term.bot; i >= orig+n; i--) {
  744. temp = term.line[i];
  745. term.line[i] = term.line[i-n];
  746. term.line[i-n] = temp;
  747. term.dirty[i] = 1;
  748. term.dirty[i-n] = 1;
  749. }
  750. selscroll(orig, n);
  751. }
  752. void
  753. tscrollup(int orig, int n) {
  754. int i;
  755. Line temp;
  756. LIMIT(n, 0, term.bot-orig+1);
  757. tclearregion(0, orig, term.col-1, orig+n-1);
  758. for(i = orig; i <= term.bot-n; i++) {
  759. temp = term.line[i];
  760. term.line[i] = term.line[i+n];
  761. term.line[i+n] = temp;
  762. term.dirty[i] = 1;
  763. term.dirty[i+n] = 1;
  764. }
  765. selscroll(orig, -n);
  766. }
  767. void
  768. selscroll(int orig, int n) {
  769. if(sel.bx == -1)
  770. return;
  771. if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
  772. if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
  773. sel.bx = -1;
  774. return;
  775. }
  776. if(sel.by < term.top) {
  777. sel.by = term.top;
  778. sel.bx = 0;
  779. }
  780. if(sel.ey > term.bot) {
  781. sel.ey = term.bot;
  782. sel.ex = term.col;
  783. }
  784. sel.b.y = sel.by, sel.b.x = sel.bx;
  785. sel.e.y = sel.ey, sel.e.x = sel.ex;
  786. }
  787. }
  788. void
  789. tnewline(int first_col) {
  790. int y = term.c.y;
  791. if(y == term.bot)
  792. tscrollup(term.top, 1);
  793. else
  794. y++;
  795. tmoveto(first_col ? 0 : term.c.x, y);
  796. }
  797. void
  798. csiparse(void) {
  799. /* int noarg = 1; */
  800. char *p = escseq.buf;
  801. escseq.narg = 0;
  802. if(*p == '?')
  803. escseq.priv = 1, p++;
  804. while(p < escseq.buf+escseq.len) {
  805. while(isdigit(*p)) {
  806. escseq.arg[escseq.narg] *= 10;
  807. escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
  808. }
  809. if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
  810. escseq.narg++, p++;
  811. else {
  812. escseq.mode = *p;
  813. escseq.narg++;
  814. return;
  815. }
  816. }
  817. }
  818. void
  819. tmoveto(int x, int y) {
  820. LIMIT(x, 0, term.col-1);
  821. LIMIT(y, 0, term.row-1);
  822. term.c.state &= ~CURSOR_WRAPNEXT;
  823. term.c.x = x;
  824. term.c.y = y;
  825. }
  826. void
  827. tsetchar(char *c) {
  828. term.dirty[term.c.y] = 1;
  829. term.line[term.c.y][term.c.x] = term.c.attr;
  830. memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
  831. term.line[term.c.y][term.c.x].state |= GLYPH_SET;
  832. }
  833. void
  834. tclearregion(int x1, int y1, int x2, int y2) {
  835. int x, y, temp;
  836. if(x1 > x2)
  837. temp = x1, x1 = x2, x2 = temp;
  838. if(y1 > y2)
  839. temp = y1, y1 = y2, y2 = temp;
  840. LIMIT(x1, 0, term.col-1);
  841. LIMIT(x2, 0, term.col-1);
  842. LIMIT(y1, 0, term.row-1);
  843. LIMIT(y2, 0, term.row-1);
  844. for(y = y1; y <= y2; y++) {
  845. term.dirty[y] = 1;
  846. for(x = x1; x <= x2; x++)
  847. term.line[y][x].state = 0;
  848. }
  849. }
  850. void
  851. tdeletechar(int n) {
  852. int src = term.c.x + n;
  853. int dst = term.c.x;
  854. int size = term.col - src;
  855. term.dirty[term.c.y] = 1;
  856. if(src >= term.col) {
  857. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  858. return;
  859. }
  860. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  861. tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
  862. }
  863. void
  864. tinsertblank(int n) {
  865. int src = term.c.x;
  866. int dst = src + n;
  867. int size = term.col - dst;
  868. term.dirty[term.c.y] = 1;
  869. if(dst >= term.col) {
  870. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  871. return;
  872. }
  873. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  874. tclearregion(src, term.c.y, dst - 1, term.c.y);
  875. }
  876. void
  877. tinsertblankline(int n) {
  878. if(term.c.y < term.top || term.c.y > term.bot)
  879. return;
  880. tscrolldown(term.c.y, n);
  881. }
  882. void
  883. tdeleteline(int n) {
  884. if(term.c.y < term.top || term.c.y > term.bot)
  885. return;
  886. tscrollup(term.c.y, n);
  887. }
  888. void
  889. tsetattr(int *attr, int l) {
  890. int i;
  891. for(i = 0; i < l; i++) {
  892. switch(attr[i]) {
  893. case 0:
  894. term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
  895. term.c.attr.fg = DefaultFG;
  896. term.c.attr.bg = DefaultBG;
  897. break;
  898. case 1:
  899. term.c.attr.mode |= ATTR_BOLD;
  900. break;
  901. case 4:
  902. term.c.attr.mode |= ATTR_UNDERLINE;
  903. break;
  904. case 7:
  905. term.c.attr.mode |= ATTR_REVERSE;
  906. break;
  907. case 22:
  908. term.c.attr.mode &= ~ATTR_BOLD;
  909. break;
  910. case 24:
  911. term.c.attr.mode &= ~ATTR_UNDERLINE;
  912. break;
  913. case 27:
  914. term.c.attr.mode &= ~ATTR_REVERSE;
  915. break;
  916. case 38:
  917. if(i + 2 < l && attr[i + 1] == 5) {
  918. i += 2;
  919. if(BETWEEN(attr[i], 0, 255))
  920. term.c.attr.fg = attr[i];
  921. else
  922. fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
  923. }
  924. else
  925. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
  926. break;
  927. case 39:
  928. term.c.attr.fg = DefaultFG;
  929. break;
  930. case 48:
  931. if(i + 2 < l && attr[i + 1] == 5) {
  932. i += 2;
  933. if(BETWEEN(attr[i], 0, 255))
  934. term.c.attr.bg = attr[i];
  935. else
  936. fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
  937. }
  938. else
  939. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
  940. break;
  941. case 49:
  942. term.c.attr.bg = DefaultBG;
  943. break;
  944. default:
  945. if(BETWEEN(attr[i], 30, 37))
  946. term.c.attr.fg = attr[i] - 30;
  947. else if(BETWEEN(attr[i], 40, 47))
  948. term.c.attr.bg = attr[i] - 40;
  949. else if(BETWEEN(attr[i], 90, 97))
  950. term.c.attr.fg = attr[i] - 90 + 8;
  951. else if(BETWEEN(attr[i], 100, 107))
  952. term.c.attr.fg = attr[i] - 100 + 8;
  953. else
  954. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
  955. break;
  956. }
  957. }
  958. }
  959. void
  960. tsetscroll(int t, int b) {
  961. int temp;
  962. LIMIT(t, 0, term.row-1);
  963. LIMIT(b, 0, term.row-1);
  964. if(t > b) {
  965. temp = t;
  966. t = b;
  967. b = temp;
  968. }
  969. term.top = t;
  970. term.bot = b;
  971. }
  972. void
  973. csihandle(void) {
  974. switch(escseq.mode) {
  975. default:
  976. unknown:
  977. fprintf(stderr, "erresc: unknown csi ");
  978. csidump();
  979. /* die(""); */
  980. break;
  981. case '@': /* ICH -- Insert <n> blank char */
  982. DEFAULT(escseq.arg[0], 1);
  983. tinsertblank(escseq.arg[0]);
  984. break;
  985. case 'A': /* CUU -- Cursor <n> Up */
  986. case 'e':
  987. DEFAULT(escseq.arg[0], 1);
  988. tmoveto(term.c.x, term.c.y-escseq.arg[0]);
  989. break;
  990. case 'B': /* CUD -- Cursor <n> Down */
  991. DEFAULT(escseq.arg[0], 1);
  992. tmoveto(term.c.x, term.c.y+escseq.arg[0]);
  993. break;
  994. case 'C': /* CUF -- Cursor <n> Forward */
  995. case 'a':
  996. DEFAULT(escseq.arg[0], 1);
  997. tmoveto(term.c.x+escseq.arg[0], term.c.y);
  998. break;
  999. case 'D': /* CUB -- Cursor <n> Backward */
  1000. DEFAULT(escseq.arg[0], 1);
  1001. tmoveto(term.c.x-escseq.arg[0], term.c.y);
  1002. break;
  1003. case 'E': /* CNL -- Cursor <n> Down and first col */
  1004. DEFAULT(escseq.arg[0], 1);
  1005. tmoveto(0, term.c.y+escseq.arg[0]);
  1006. break;
  1007. case 'F': /* CPL -- Cursor <n> Up and first col */
  1008. DEFAULT(escseq.arg[0], 1);
  1009. tmoveto(0, term.c.y-escseq.arg[0]);
  1010. break;
  1011. case 'G': /* CHA -- Move to <col> */
  1012. case '`': /* XXX: HPA -- same? */
  1013. DEFAULT(escseq.arg[0], 1);
  1014. tmoveto(escseq.arg[0]-1, term.c.y);
  1015. break;
  1016. case 'H': /* CUP -- Move to <row> <col> */
  1017. case 'f': /* XXX: HVP -- same? */
  1018. DEFAULT(escseq.arg[0], 1);
  1019. DEFAULT(escseq.arg[1], 1);
  1020. tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
  1021. break;
  1022. /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
  1023. case 'J': /* ED -- Clear screen */
  1024. sel.bx = -1;
  1025. switch(escseq.arg[0]) {
  1026. case 0: /* below */
  1027. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1028. if(term.c.y < term.row-1)
  1029. tclearregion(0, term.c.y+1, term.col-1, term.row-1);
  1030. break;
  1031. case 1: /* above */
  1032. if(term.c.y > 1)
  1033. tclearregion(0, 0, term.col-1, term.c.y-1);
  1034. tclearregion(0, term.c.y, term.c.x, term.c.y);
  1035. break;
  1036. case 2: /* all */
  1037. tclearregion(0, 0, term.col-1, term.row-1);
  1038. break;
  1039. default:
  1040. goto unknown;
  1041. }
  1042. break;
  1043. case 'K': /* EL -- Clear line */
  1044. switch(escseq.arg[0]) {
  1045. case 0: /* right */
  1046. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1047. break;
  1048. case 1: /* left */
  1049. tclearregion(0, term.c.y, term.c.x, term.c.y);
  1050. break;
  1051. case 2: /* all */
  1052. tclearregion(0, term.c.y, term.col-1, term.c.y);
  1053. break;
  1054. }
  1055. break;
  1056. case 'S': /* SU -- Scroll <n> line up */
  1057. DEFAULT(escseq.arg[0], 1);
  1058. tscrollup(term.top, escseq.arg[0]);
  1059. break;
  1060. case 'T': /* SD -- Scroll <n> line down */
  1061. DEFAULT(escseq.arg[0], 1);
  1062. tscrolldown(term.top, escseq.arg[0]);
  1063. break;
  1064. case 'L': /* IL -- Insert <n> blank lines */
  1065. DEFAULT(escseq.arg[0], 1);
  1066. tinsertblankline(escseq.arg[0]);
  1067. break;
  1068. case 'l': /* RM -- Reset Mode */
  1069. if(escseq.priv) {
  1070. switch(escseq.arg[0]) {
  1071. case 1:
  1072. term.mode &= ~MODE_APPKEYPAD;
  1073. break;
  1074. case 5: /* DECSCNM -- Remove reverse video */
  1075. if(IS_SET(MODE_REVERSE)) {
  1076. term.mode &= ~MODE_REVERSE;
  1077. draw();
  1078. }
  1079. break;
  1080. case 7:
  1081. term.mode &= ~MODE_WRAP;
  1082. break;
  1083. case 12: /* att610 -- Stop blinking cursor (IGNORED) */
  1084. break;
  1085. case 20:
  1086. term.mode &= ~MODE_CRLF;
  1087. break;
  1088. case 25:
  1089. term.c.state |= CURSOR_HIDE;
  1090. break;
  1091. case 1000: /* disable X11 xterm mouse reporting */
  1092. term.mode &= ~MODE_MOUSEBTN;
  1093. break;
  1094. case 1002:
  1095. term.mode &= ~MODE_MOUSEMOTION;
  1096. break;
  1097. case 1049: /* = 1047 and 1048 */
  1098. case 47:
  1099. case 1047:
  1100. if(IS_SET(MODE_ALTSCREEN)) {
  1101. tclearregion(0, 0, term.col-1, term.row-1);
  1102. tswapscreen();
  1103. }
  1104. if(escseq.arg[0] != 1049)
  1105. break;
  1106. case 1048:
  1107. tcursor(CURSOR_LOAD);
  1108. break;
  1109. default:
  1110. goto unknown;
  1111. }
  1112. } else {
  1113. switch(escseq.arg[0]) {
  1114. case 4:
  1115. term.mode &= ~MODE_INSERT;
  1116. break;
  1117. default:
  1118. goto unknown;
  1119. }
  1120. }
  1121. break;
  1122. case 'M': /* DL -- Delete <n> lines */
  1123. DEFAULT(escseq.arg[0], 1);
  1124. tdeleteline(escseq.arg[0]);
  1125. break;
  1126. case 'X': /* ECH -- Erase <n> char */
  1127. DEFAULT(escseq.arg[0], 1);
  1128. tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
  1129. break;
  1130. case 'P': /* DCH -- Delete <n> char */
  1131. DEFAULT(escseq.arg[0], 1);
  1132. tdeletechar(escseq.arg[0]);
  1133. break;
  1134. /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
  1135. case 'd': /* VPA -- Move to <row> */
  1136. DEFAULT(escseq.arg[0], 1);
  1137. tmoveto(term.c.x, escseq.arg[0]-1);
  1138. break;
  1139. case 'h': /* SM -- Set terminal mode */
  1140. if(escseq.priv) {
  1141. switch(escseq.arg[0]) {
  1142. case 1:
  1143. term.mode |= MODE_APPKEYPAD;
  1144. break;
  1145. case 5: /* DECSCNM -- Reverve video */
  1146. if(!IS_SET(MODE_REVERSE)) {
  1147. term.mode |= MODE_REVERSE;
  1148. draw();
  1149. }
  1150. break;
  1151. case 7:
  1152. term.mode |= MODE_WRAP;
  1153. break;
  1154. case 20:
  1155. term.mode |= MODE_CRLF;
  1156. break;
  1157. case 12: /* att610 -- Start blinking cursor (IGNORED) */
  1158. /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
  1159. if(escseq.narg > 1 && escseq.arg[1] != 25)
  1160. break;
  1161. case 25:
  1162. term.c.state &= ~CURSOR_HIDE;
  1163. break;
  1164. case 1000: /* 1000,1002: enable xterm mouse report */
  1165. term.mode |= MODE_MOUSEBTN;
  1166. break;
  1167. case 1002:
  1168. term.mode |= MODE_MOUSEMOTION;
  1169. break;
  1170. case 1049: /* = 1047 and 1048 */
  1171. case 47:
  1172. case 1047:
  1173. if(IS_SET(MODE_ALTSCREEN))
  1174. tclearregion(0, 0, term.col-1, term.row-1);
  1175. else
  1176. tswapscreen();
  1177. if(escseq.arg[0] != 1049)
  1178. break;
  1179. case 1048:
  1180. tcursor(CURSOR_SAVE);
  1181. break;
  1182. default: goto unknown;
  1183. }
  1184. } else {
  1185. switch(escseq.arg[0]) {
  1186. case 4:
  1187. term.mode |= MODE_INSERT;
  1188. break;
  1189. default: goto unknown;
  1190. }
  1191. };
  1192. break;
  1193. case 'm': /* SGR -- Terminal attribute (color) */
  1194. tsetattr(escseq.arg, escseq.narg);
  1195. break;
  1196. case 'r': /* DECSTBM -- Set Scrolling Region */
  1197. if(escseq.priv)
  1198. goto unknown;
  1199. else {
  1200. DEFAULT(escseq.arg[0], 1);
  1201. DEFAULT(escseq.arg[1], term.row);
  1202. tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
  1203. tmoveto(0, 0);
  1204. }
  1205. break;
  1206. case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
  1207. tcursor(CURSOR_SAVE);
  1208. break;
  1209. case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
  1210. tcursor(CURSOR_LOAD);
  1211. break;
  1212. }
  1213. }
  1214. void
  1215. csidump(void) {
  1216. int i;
  1217. printf("ESC [ %s", escseq.priv ? "? " : "");
  1218. if(escseq.narg)
  1219. for(i = 0; i < escseq.narg; i++)
  1220. printf("%d ", escseq.arg[i]);
  1221. if(escseq.mode)
  1222. putchar(escseq.mode);
  1223. putchar('\n');
  1224. }
  1225. void
  1226. csireset(void) {
  1227. memset(&escseq, 0, sizeof(escseq));
  1228. }
  1229. void
  1230. tputtab(void) {
  1231. int space = TAB - term.c.x % TAB;
  1232. tmoveto(term.c.x + space, term.c.y);
  1233. }
  1234. void
  1235. tputc(char *c) {
  1236. char ascii = *c;
  1237. if(term.esc & ESC_START) {
  1238. if(term.esc & ESC_CSI) {
  1239. escseq.buf[escseq.len++] = ascii;
  1240. if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
  1241. term.esc = 0;
  1242. csiparse(), csihandle();
  1243. }
  1244. /* TODO: handle other OSC */
  1245. } else if(term.esc & ESC_OSC) {
  1246. if(ascii == ';') {
  1247. term.titlelen = 0;
  1248. term.esc = ESC_START | ESC_TITLE;
  1249. }
  1250. } else if(term.esc & ESC_TITLE) {
  1251. if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
  1252. term.esc = 0;
  1253. term.title[term.titlelen] = '\0';
  1254. XStoreName(xw.dpy, xw.win, term.title);
  1255. } else {
  1256. term.title[term.titlelen++] = ascii;
  1257. }
  1258. } else if(term.esc & ESC_ALTCHARSET) {
  1259. switch(ascii) {
  1260. case '0': /* Line drawing crap */
  1261. term.c.attr.mode |= ATTR_GFX;
  1262. break;
  1263. case 'B': /* Back to regular text */
  1264. term.c.attr.mode &= ~ATTR_GFX;
  1265. break;
  1266. default:
  1267. fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
  1268. }
  1269. term.esc = 0;
  1270. } else {
  1271. switch(ascii) {
  1272. case '[':
  1273. term.esc |= ESC_CSI;
  1274. break;
  1275. case ']':
  1276. term.esc |= ESC_OSC;
  1277. break;
  1278. case '(':
  1279. term.esc |= ESC_ALTCHARSET;
  1280. break;
  1281. case 'D': /* IND -- Linefeed */
  1282. if(term.c.y == term.bot)
  1283. tscrollup(term.top, 1);
  1284. else
  1285. tmoveto(term.c.x, term.c.y+1);
  1286. term.esc = 0;
  1287. break;
  1288. case 'E': /* NEL -- Next line */
  1289. tnewline(1); /* always go to first col */
  1290. term.esc = 0;
  1291. break;
  1292. case 'M': /* RI -- Reverse index */
  1293. if(term.c.y == term.top)
  1294. tscrolldown(term.top, 1);
  1295. else
  1296. tmoveto(term.c.x, term.c.y-1);
  1297. term.esc = 0;
  1298. break;
  1299. case 'c': /* RIS -- Reset to inital state */
  1300. treset();
  1301. term.esc = 0;
  1302. break;
  1303. case '=': /* DECPAM -- Application keypad */
  1304. term.mode |= MODE_APPKEYPAD;
  1305. term.esc = 0;
  1306. break;
  1307. case '>': /* DECPNM -- Normal keypad */
  1308. term.mode &= ~MODE_APPKEYPAD;
  1309. term.esc = 0;
  1310. break;
  1311. case '7': /* DECSC -- Save Cursor */
  1312. tcursor(CURSOR_SAVE);
  1313. term.esc = 0;
  1314. break;
  1315. case '8': /* DECRC -- Restore Cursor */
  1316. tcursor(CURSOR_LOAD);
  1317. term.esc = 0;
  1318. break;
  1319. default:
  1320. fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
  1321. (uchar) ascii, isprint(ascii)?ascii:'.');
  1322. term.esc = 0;
  1323. }
  1324. }
  1325. } else {
  1326. if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
  1327. sel.bx = -1;
  1328. switch(ascii) {
  1329. case '\t':
  1330. tputtab();
  1331. break;
  1332. case '\b':
  1333. tmoveto(term.c.x-1, term.c.y);
  1334. break;
  1335. case '\r':
  1336. tmoveto(0, term.c.y);
  1337. break;
  1338. case '\f':
  1339. case '\v':
  1340. case '\n':
  1341. /* go to first col if the mode is set */
  1342. tnewline(IS_SET(MODE_CRLF));
  1343. break;
  1344. case '\a':
  1345. if(!(xw.state & WIN_FOCUSED))
  1346. xseturgency(1);
  1347. break;
  1348. case '\033':
  1349. csireset();
  1350. term.esc = ESC_START;
  1351. break;
  1352. default:
  1353. if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
  1354. tnewline(1); /* always go to first col */
  1355. tsetchar(c);
  1356. if(term.c.x+1 < term.col)
  1357. tmoveto(term.c.x+1, term.c.y);
  1358. else
  1359. term.c.state |= CURSOR_WRAPNEXT;
  1360. }
  1361. }
  1362. }
  1363. int
  1364. tresize(int col, int row) {
  1365. int i, x;
  1366. int minrow = MIN(row, term.row);
  1367. int mincol = MIN(col, term.col);
  1368. int slide = term.c.y - row + 1;
  1369. if(col < 1 || row < 1)
  1370. return 0;
  1371. /* free unneeded rows */
  1372. i = 0;
  1373. if(slide > 0) {
  1374. /* slide screen to keep cursor where we expect it -
  1375. * tscrollup would work here, but we can optimize to
  1376. * memmove because we're freeing the earlier lines */
  1377. for(/* i = 0 */; i < slide; i++) {
  1378. free(term.line[i]);
  1379. free(term.alt[i]);
  1380. }
  1381. memmove(term.line, term.line + slide, row * sizeof(Line));
  1382. memmove(term.alt, term.alt + slide, row * sizeof(Line));
  1383. }
  1384. for(i += row; i < term.row; i++) {
  1385. free(term.line[i]);
  1386. free(term.alt[i]);
  1387. }
  1388. /* resize to new height */
  1389. term.line = realloc(term.line, row * sizeof(Line));
  1390. term.alt = realloc(term.alt, row * sizeof(Line));
  1391. term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
  1392. /* resize each row to new width, zero-pad if needed */
  1393. for(i = 0; i < minrow; i++) {
  1394. term.dirty[i] = 1;
  1395. term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
  1396. term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
  1397. for(x = mincol; x < col; x++) {
  1398. term.line[i][x].state = 0;
  1399. term.alt[i][x].state = 0;
  1400. }
  1401. }
  1402. /* allocate any new rows */
  1403. for(/* i == minrow */; i < row; i++) {
  1404. term.dirty[i] = 1;
  1405. term.line[i] = calloc(col, sizeof(Glyph));
  1406. term.alt [i] = calloc(col, sizeof(Glyph));
  1407. }
  1408. /* update terminal size */
  1409. term.col = col, term.row = row;
  1410. /* make use of the LIMIT in tmoveto */
  1411. tmoveto(term.c.x, term.c.y);
  1412. /* reset scrolling region */
  1413. tsetscroll(0, row-1);
  1414. return (slide > 0);
  1415. }
  1416. void
  1417. xresize(int col, int row) {
  1418. Pixmap newbuf;
  1419. int oldw, oldh;
  1420. oldw = xw.bufw;
  1421. oldh = xw.bufh;
  1422. xw.bufw = MAX(1, col * xw.cw);
  1423. xw.bufh = MAX(1, row * xw.ch);
  1424. newbuf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
  1425. XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
  1426. XFreePixmap(xw.dpy, xw.buf);
  1427. XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
  1428. if(xw.bufw > oldw)
  1429. XFillRectangle(xw.dpy, newbuf, dc.gc, oldw, 0,
  1430. xw.bufw-oldw, MIN(xw.bufh, oldh));
  1431. else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
  1432. XClearArea(xw.dpy, xw.win, BORDER+xw.bufw, BORDER,
  1433. xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
  1434. False);
  1435. if(xw.bufh > oldh)
  1436. XFillRectangle(xw.dpy, newbuf, dc.gc, 0, oldh,
  1437. xw.bufw, xw.bufh-oldh);
  1438. else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
  1439. XClearArea(xw.dpy, xw.win, BORDER, BORDER+xw.bufh,
  1440. xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
  1441. False);
  1442. xw.buf = newbuf;
  1443. }
  1444. void
  1445. xloadcols(void) {
  1446. int i, r, g, b;
  1447. XColor color;
  1448. ulong white = WhitePixel(xw.dpy, xw.scr);
  1449. for(i = 0; i < LEN(colorname); i++) {
  1450. if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
  1451. dc.col[i] = white;
  1452. fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
  1453. } else
  1454. dc.col[i] = color.pixel;
  1455. }
  1456. /* same colors as xterm */
  1457. for(r = 0; r < 6; r++)
  1458. for(g = 0; g < 6; g++)
  1459. for(b = 0; b < 6; b++) {
  1460. color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
  1461. color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
  1462. color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
  1463. if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1464. dc.col[i] = white;
  1465. fprintf(stderr, "Could not allocate color %d\n", i);
  1466. } else
  1467. dc.col[i] = color.pixel;
  1468. i++;
  1469. }
  1470. for(r = 0; r < 24; r++, i++) {
  1471. color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
  1472. if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1473. dc.col[i] = white;
  1474. fprintf(stderr, "Could not allocate color %d\n", i);
  1475. } else
  1476. dc.col[i] = color.pixel;
  1477. }
  1478. }
  1479. void
  1480. xclear(int x1, int y1, int x2, int y2) {
  1481. XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
  1482. XFillRectangle(xw.dpy, xw.buf, dc.gc,
  1483. x1 * xw.cw, y1 * xw.ch,
  1484. (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
  1485. }
  1486. void
  1487. xhints(void) {
  1488. XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
  1489. XWMHints wm = {.flags = InputHint, .input = 1};
  1490. XSizeHints size = {
  1491. .flags = PSize | PResizeInc | PBaseSize,
  1492. .height = xw.h,
  1493. .width = xw.w,
  1494. .height_inc = xw.ch,
  1495. .width_inc = xw.cw,
  1496. .base_height = 2*BORDER,
  1497. .base_width = 2*BORDER,
  1498. };
  1499. XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
  1500. }
  1501. XFontSet
  1502. xinitfont(char *fontstr) {
  1503. XFontSet set;
  1504. char *def, **missing;
  1505. int n;
  1506. missing = NULL;
  1507. set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
  1508. if(missing) {
  1509. while(n--)
  1510. fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
  1511. XFreeStringList(missing);
  1512. }
  1513. return set;
  1514. }
  1515. void
  1516. xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
  1517. XFontStruct **xfonts;
  1518. char **font_names;
  1519. int i, n;
  1520. *ascent = *descent = *lbearing = *rbearing = 0;
  1521. n = XFontsOfFontSet(set, &xfonts, &font_names);
  1522. for(i = 0; i < n; i++) {
  1523. *ascent = MAX(*ascent, (*xfonts)->ascent);
  1524. *descent = MAX(*descent, (*xfonts)->descent);
  1525. *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
  1526. *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
  1527. xfonts++;
  1528. }
  1529. }
  1530. void
  1531. initfonts(char *fontstr, char *bfontstr) {
  1532. if((dc.font.set = xinitfont(fontstr)) == NULL ||
  1533. (dc.bfont.set = xinitfont(bfontstr)) == NULL)
  1534. die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
  1535. xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
  1536. &dc.font.lbearing, &dc.font.rbearing);
  1537. xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
  1538. &dc.bfont.lbearing, &dc.bfont.rbearing);
  1539. }
  1540. void
  1541. xinit(void) {
  1542. XSetWindowAttributes attrs;
  1543. Cursor cursor;
  1544. Window parent;
  1545. if(!(xw.dpy = XOpenDisplay(NULL)))
  1546. die("Can't open display\n");
  1547. xw.scr = XDefaultScreen(xw.dpy);
  1548. /* font */
  1549. initfonts(FONT, BOLDFONT);
  1550. /* XXX: Assuming same size for bold font */
  1551. xw.cw = dc.font.rbearing - dc.font.lbearing;
  1552. xw.ch = dc.font.ascent + dc.font.descent;
  1553. /* colors */
  1554. xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
  1555. xloadcols();
  1556. /* window - default size */
  1557. xw.bufh = term.row * xw.ch;
  1558. xw.bufw = term.col * xw.cw;
  1559. xw.h = xw.bufh + 2*BORDER;
  1560. xw.w = xw.bufw + 2*BORDER;
  1561. attrs.background_pixel = dc.col[DefaultBG];
  1562. attrs.border_pixel = dc.col[DefaultBG];
  1563. attrs.bit_gravity = NorthWestGravity;
  1564. attrs.event_mask = FocusChangeMask | KeyPressMask
  1565. | ExposureMask | VisibilityChangeMask | StructureNotifyMask
  1566. | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
  1567. | EnterWindowMask | LeaveWindowMask;
  1568. attrs.colormap = xw.cmap;
  1569. parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
  1570. xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
  1571. xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
  1572. XDefaultVisual(xw.dpy, xw.scr),
  1573. CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
  1574. | CWColormap,
  1575. &attrs);
  1576. xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
  1577. /* input methods */
  1578. xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
  1579. xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
  1580. | XIMStatusNothing, XNClientWindow, xw.win,
  1581. XNFocusWindow, xw.win, NULL);
  1582. /* gc */
  1583. dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
  1584. /* white cursor, black outline */
  1585. cursor = XCreateFontCursor(xw.dpy, XC_xterm);
  1586. XDefineCursor(xw.dpy, xw.win, cursor);
  1587. XRecolorCursor(xw.dpy, cursor,
  1588. &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
  1589. &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
  1590. xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
  1591. XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
  1592. XMapWindow(xw.dpy, xw.win);
  1593. xhints();
  1594. XSync(xw.dpy, 0);
  1595. }
  1596. void
  1597. xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
  1598. ulong xfg = dc.col[base.fg], xbg = dc.col[base.bg], temp;
  1599. int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
  1600. int i;
  1601. /* only switch default fg/bg if term is in RV mode */
  1602. if(IS_SET(MODE_REVERSE)) {
  1603. if(base.fg == DefaultFG)
  1604. xfg = dc.col[DefaultBG];
  1605. if(base.bg == DefaultBG)
  1606. xbg = dc.col[DefaultFG];
  1607. }
  1608. if(base.mode & ATTR_REVERSE)
  1609. temp = xfg, xfg = xbg, xbg = temp;
  1610. XSetBackground(xw.dpy, dc.gc, xbg);
  1611. XSetForeground(xw.dpy, dc.gc, xfg);
  1612. if(base.mode & ATTR_GFX) {
  1613. for(i = 0; i < bytelen; i++) {
  1614. char c = gfx[(uint)s[i] % 256];
  1615. if(c)
  1616. s[i] = c;
  1617. else if(s[i] > 0x5f)
  1618. s[i] -= 0x5f;
  1619. }
  1620. }
  1621. XmbDrawImageString(xw.dpy, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
  1622. dc.gc, winx, winy, s, bytelen);
  1623. if(base.mode & ATTR_UNDERLINE)
  1624. XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
  1625. }
  1626. /* copy buffer pixmap to screen pixmap */
  1627. void
  1628. xcopy(int x, int y, int cols, int rows) {
  1629. int src_x = x*xw.cw, src_y = y*xw.ch, src_w = cols*xw.cw, src_h = rows*xw.ch;
  1630. int dst_x = BORDER+src_x, dst_y = BORDER+src_y;
  1631. XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, src_x, src_y, src_w, src_h, dst_x, dst_y);
  1632. }
  1633. void
  1634. xdrawcursor(void) {
  1635. static int oldx = 0;
  1636. static int oldy = 0;
  1637. int sl;
  1638. Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
  1639. LIMIT(oldx, 0, term.col-1);
  1640. LIMIT(oldy, 0, term.row-1);
  1641. if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
  1642. memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
  1643. /* remove the old cursor */
  1644. if(term.line[oldy][oldx].state & GLYPH_SET) {
  1645. sl = utf8size(term.line[oldy][oldx].c);
  1646. xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
  1647. } else
  1648. xclear(oldx, oldy, oldx, oldy);
  1649. xcopy(oldx, oldy, 1, 1);
  1650. /* draw the new one */
  1651. if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
  1652. sl = utf8size(g.c);
  1653. if(IS_SET(MODE_REVERSE))
  1654. g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
  1655. xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
  1656. oldx = term.c.x, oldy = term.c.y;
  1657. }
  1658. xcopy(term.c.x, term.c.y, 1, 1);
  1659. }
  1660. void
  1661. draw() {
  1662. drawregion(0, 0, term.col, term.row);
  1663. gettimeofday(&xw.lastdraw, NULL);
  1664. }
  1665. void
  1666. drawregion(int x1, int y1, int x2, int y2) {
  1667. int ic, ib, x, y, ox, sl;
  1668. Glyph base, new;
  1669. char buf[DRAW_BUF_SIZ];
  1670. if(!(xw.state & WIN_VISIBLE))
  1671. return;
  1672. for(y = y1; y < y2; y++) {
  1673. if(!term.dirty[y])
  1674. continue;
  1675. xclear(0, y, term.col, y);
  1676. term.dirty[y] = 0;
  1677. base = term.line[y][0];
  1678. ic = ib = ox = 0;
  1679. for(x = x1; x < x2; x++) {
  1680. new = term.line[y][x];
  1681. if(sel.bx != -1 && *(new.c) && selected(x, y))
  1682. new.mode ^= ATTR_REVERSE;
  1683. if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
  1684. ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
  1685. xdraws(buf, base, ox, y, ic, ib);
  1686. ic = ib = 0;
  1687. }
  1688. if(new.state & GLYPH_SET) {
  1689. if(ib == 0) {
  1690. ox = x;
  1691. base = new;
  1692. }
  1693. sl = utf8size(new.c);
  1694. memcpy(buf+ib, new.c, sl);
  1695. ib += sl;
  1696. ++ic;
  1697. }
  1698. }
  1699. if(ib > 0)
  1700. xdraws(buf, base, ox, y, ic, ib);
  1701. xcopy(0, y, term.col, 1);
  1702. }
  1703. xdrawcursor();
  1704. }
  1705. void
  1706. expose(XEvent *ev) {
  1707. XExposeEvent *e = &ev->xexpose;
  1708. if(xw.state & WIN_REDRAW) {
  1709. if(!e->count) {
  1710. xw.state &= ~WIN_REDRAW;
  1711. xcopy(0, 0, term.col, term.row);
  1712. }
  1713. } else
  1714. XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
  1715. e->width, e->height, e->x, e->y);
  1716. }
  1717. void
  1718. visibility(XEvent *ev) {
  1719. XVisibilityEvent *e = &ev->xvisibility;
  1720. if(e->state == VisibilityFullyObscured)
  1721. xw.state &= ~WIN_VISIBLE;
  1722. else if(!(xw.state & WIN_VISIBLE))
  1723. /* need a full redraw for next Expose, not just a buf copy */
  1724. xw.state |= WIN_VISIBLE | WIN_REDRAW;
  1725. }
  1726. void
  1727. unmap(XEvent *ev) {
  1728. xw.state &= ~WIN_VISIBLE;
  1729. }
  1730. void
  1731. xseturgency(int add) {
  1732. XWMHints *h = XGetWMHints(xw.dpy, xw.win);
  1733. h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
  1734. XSetWMHints(xw.dpy, xw.win, h);
  1735. XFree(h);
  1736. }
  1737. void
  1738. focus(XEvent *ev) {
  1739. if(ev->type == FocusIn) {
  1740. xw.state |= WIN_FOCUSED;
  1741. xseturgency(0);
  1742. } else
  1743. xw.state &= ~WIN_FOCUSED;
  1744. draw();
  1745. }
  1746. char*
  1747. kmap(KeySym k, uint state) {
  1748. int i;
  1749. state &= ~Mod2Mask;
  1750. for(i = 0; i < LEN(key); i++) {
  1751. uint mask = key[i].mask;
  1752. if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
  1753. return (char*)key[i].s;
  1754. }
  1755. return NULL;
  1756. }
  1757. void
  1758. kpress(XEvent *ev) {
  1759. XKeyEvent *e = &ev->xkey;
  1760. KeySym ksym;
  1761. char buf[32];
  1762. char *customkey;
  1763. int len;
  1764. int meta;
  1765. int shift;
  1766. Status status;
  1767. meta = e->state & Mod1Mask;
  1768. shift = e->state & ShiftMask;
  1769. len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
  1770. /* 1. custom keys from config.h */
  1771. if((customkey = kmap(ksym, e->state)))
  1772. ttywrite(customkey, strlen(customkey));
  1773. /* 2. hardcoded (overrides X lookup) */
  1774. else
  1775. switch(ksym) {
  1776. case XK_Up:
  1777. case XK_Down:
  1778. case XK_Left:
  1779. case XK_Right:
  1780. /* XXX: shift up/down doesn't work */
  1781. sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
  1782. ttywrite(buf, 3);
  1783. break;
  1784. case XK_Insert:
  1785. if(shift)
  1786. selpaste();
  1787. break;
  1788. case XK_Return:
  1789. if(IS_SET(MODE_CRLF))
  1790. ttywrite("\r\n", 2);
  1791. else
  1792. ttywrite("\r", 1);
  1793. break;
  1794. /* 3. X lookup */
  1795. default:
  1796. if(len > 0) {
  1797. if(meta && len == 1)
  1798. ttywrite("\033", 1);
  1799. ttywrite(buf, len);
  1800. }
  1801. break;
  1802. }
  1803. }
  1804. void
  1805. cmessage(XEvent *e) {
  1806. /* See xembed specs
  1807. http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
  1808. if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
  1809. if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
  1810. xw.state |= WIN_FOCUSED;
  1811. xseturgency(0);
  1812. } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
  1813. xw.state &= ~WIN_FOCUSED;
  1814. }
  1815. draw();
  1816. }
  1817. }
  1818. void
  1819. resize(XEvent *e) {
  1820. int col, row;
  1821. if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
  1822. return;
  1823. xw.w = e->xconfigure.width;
  1824. xw.h = e->xconfigure.height;
  1825. col = (xw.w - 2*BORDER) / xw.cw;
  1826. row = (xw.h - 2*BORDER) / xw.ch;
  1827. if(col == term.col && row == term.row)
  1828. return;
  1829. if(tresize(col, row))
  1830. draw();
  1831. ttyresize(col, row);
  1832. xresize(col, row);
  1833. }
  1834. bool
  1835. last_draw_too_old(void) {
  1836. struct timeval now;
  1837. gettimeofday(&now, NULL);
  1838. return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
  1839. }
  1840. void
  1841. run(void) {
  1842. XEvent ev;
  1843. fd_set rfd;
  1844. int xfd = XConnectionNumber(xw.dpy);
  1845. struct timeval timeout = {0};
  1846. bool stuff_to_print = 0;
  1847. for(;;) {
  1848. FD_ZERO(&rfd);
  1849. FD_SET(cmdfd, &rfd);
  1850. FD_SET(xfd, &rfd);
  1851. timeout.tv_sec = 0;
  1852. timeout.tv_usec = SELECT_TIMEOUT;
  1853. if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
  1854. if(errno == EINTR)
  1855. continue;
  1856. die("select failed: %s\n", SERRNO);
  1857. }
  1858. if(FD_ISSET(cmdfd, &rfd)) {
  1859. ttyread();
  1860. stuff_to_print = 1;
  1861. }
  1862. if(stuff_to_print && last_draw_too_old()) {
  1863. stuff_to_print = 0;
  1864. draw();
  1865. }
  1866. while(XPending(xw.dpy)) {
  1867. XNextEvent(xw.dpy, &ev);
  1868. if(XFilterEvent(&ev, xw.win))
  1869. continue;
  1870. if(handler[ev.type])
  1871. (handler[ev.type])(&ev);
  1872. }
  1873. }
  1874. }
  1875. int
  1876. main(int argc, char *argv[]) {
  1877. int i;
  1878. for(i = 1; i < argc; i++) {
  1879. switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
  1880. case 't':
  1881. if(++i < argc) opt_title = argv[i];
  1882. break;
  1883. case 'c':
  1884. if(++i < argc) opt_class = argv[i];
  1885. break;
  1886. case 'w':
  1887. if(++i < argc) opt_embed = argv[i];
  1888. break;
  1889. case 'e':
  1890. /* eat every remaining arguments */
  1891. if(++i < argc) opt_cmd = &argv[i];
  1892. goto run;
  1893. case 'v':
  1894. default:
  1895. die(USAGE);
  1896. }
  1897. }
  1898. run:
  1899. setlocale(LC_CTYPE, "");
  1900. tnew(80, 24);
  1901. ttynew();
  1902. xinit();
  1903. selinit();
  1904. run();
  1905. return 0;
  1906. }