Simple Terminal from SuckLess
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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. #include <X11/extensions/Xdbe.h>
  28. #if defined(__linux)
  29. #include <pty.h>
  30. #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  31. #include <util.h>
  32. #elif defined(__FreeBSD__) || defined(__DragonFly__)
  33. #include <libutil.h>
  34. #endif
  35. #define USAGE \
  36. "st " VERSION " (c) 2010-2012 st engineers\n" \
  37. "usage: st [-t title] [-c class] [-w windowid] [-v] [-e command...]\n"
  38. /* XEMBED messages */
  39. #define XEMBED_FOCUS_IN 4
  40. #define XEMBED_FOCUS_OUT 5
  41. /* Arbitrary sizes */
  42. #define ESC_TITLE_SIZ 256
  43. #define ESC_BUF_SIZ 256
  44. #define ESC_ARG_SIZ 16
  45. #define DRAW_BUF_SIZ 1024
  46. #define UTF_SIZ 4
  47. #define XK_NO_MOD UINT_MAX
  48. #define XK_ANY_MOD 0
  49. #define SELECT_TIMEOUT (20*1000) /* 20 ms */
  50. #define DRAW_TIMEOUT (20*1000) /* 20 ms */
  51. #define SERRNO strerror(errno)
  52. #define MIN(a, b) ((a) < (b) ? (a) : (b))
  53. #define MAX(a, b) ((a) < (b) ? (b) : (a))
  54. #define LEN(a) (sizeof(a) / sizeof(a[0]))
  55. #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
  56. #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
  57. #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  58. #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  59. #define IS_SET(flag) (term.mode & (flag))
  60. #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
  61. #define X2COL(x) (((x) - BORDER)/xw.cw)
  62. #define Y2ROW(y) (((y) - BORDER)/xw.ch)
  63. enum glyph_attribute {
  64. ATTR_NULL = 0,
  65. ATTR_REVERSE = 1,
  66. ATTR_UNDERLINE = 2,
  67. ATTR_BOLD = 4,
  68. ATTR_GFX = 8,
  69. };
  70. enum cursor_movement {
  71. CURSOR_UP,
  72. CURSOR_DOWN,
  73. CURSOR_LEFT,
  74. CURSOR_RIGHT,
  75. CURSOR_SAVE,
  76. CURSOR_LOAD
  77. };
  78. enum cursor_state {
  79. CURSOR_DEFAULT = 0,
  80. CURSOR_HIDE = 1,
  81. CURSOR_WRAPNEXT = 2
  82. };
  83. enum glyph_state {
  84. GLYPH_SET = 1,
  85. GLYPH_DIRTY = 2
  86. };
  87. enum term_mode {
  88. MODE_WRAP = 1,
  89. MODE_INSERT = 2,
  90. MODE_APPKEYPAD = 4,
  91. MODE_ALTSCREEN = 8,
  92. MODE_CRLF = 16,
  93. MODE_MOUSEBTN = 32,
  94. MODE_MOUSEMOTION = 64,
  95. MODE_MOUSE = 32|64,
  96. MODE_REVERSE = 128
  97. };
  98. enum escape_state {
  99. ESC_START = 1,
  100. ESC_CSI = 2,
  101. ESC_OSC = 4,
  102. ESC_TITLE = 8,
  103. ESC_ALTCHARSET = 16
  104. };
  105. enum window_state {
  106. WIN_VISIBLE = 1,
  107. WIN_REDRAW = 2,
  108. WIN_FOCUSED = 4
  109. };
  110. /* bit macro */
  111. #undef B0
  112. enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
  113. typedef unsigned char uchar;
  114. typedef unsigned int uint;
  115. typedef unsigned long ulong;
  116. typedef unsigned short ushort;
  117. typedef struct {
  118. char c[UTF_SIZ]; /* character code */
  119. uchar mode; /* attribute flags */
  120. ushort fg; /* foreground */
  121. ushort bg; /* background */
  122. uchar state; /* state flags */
  123. } Glyph;
  124. typedef Glyph* Line;
  125. typedef struct {
  126. Glyph attr; /* current char attributes */
  127. int x;
  128. int y;
  129. char state;
  130. } TCursor;
  131. /* CSI Escape sequence structs */
  132. /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  133. typedef struct {
  134. char buf[ESC_BUF_SIZ]; /* raw string */
  135. int len; /* raw string length */
  136. char priv;
  137. int arg[ESC_ARG_SIZ];
  138. int narg; /* nb of args */
  139. char mode;
  140. } CSIEscape;
  141. /* Internal representation of the screen */
  142. typedef struct {
  143. int row; /* nb row */
  144. int col; /* nb col */
  145. Line* line; /* screen */
  146. Line* alt; /* alternate screen */
  147. bool* dirty; /* dirtyness of lines */
  148. TCursor c; /* cursor */
  149. int top; /* top scroll limit */
  150. int bot; /* bottom scroll limit */
  151. int mode; /* terminal mode flags */
  152. int esc; /* escape state flags */
  153. char title[ESC_TITLE_SIZ];
  154. int titlelen;
  155. bool *tabs;
  156. } Term;
  157. /* Purely graphic info */
  158. typedef struct {
  159. Display* dpy;
  160. Colormap cmap;
  161. Window win;
  162. XdbeBackBuffer buf;
  163. Atom xembed;
  164. XIM xim;
  165. XIC xic;
  166. int scr;
  167. int w; /* window width */
  168. int h; /* window height */
  169. int ch; /* char height */
  170. int cw; /* char width */
  171. char state; /* focus, redraw, visible */
  172. struct timeval lastdraw;
  173. } XWindow;
  174. typedef struct {
  175. KeySym k;
  176. uint mask;
  177. char s[ESC_BUF_SIZ];
  178. } Key;
  179. /* TODO: use better name for vars... */
  180. typedef struct {
  181. int mode;
  182. int bx, by;
  183. int ex, ey;
  184. struct {int x, y;} b, e;
  185. char *clip;
  186. Atom xtarget;
  187. struct timeval tclick1;
  188. struct timeval tclick2;
  189. } Selection;
  190. #include "config.h"
  191. /* Drawing Context */
  192. typedef struct {
  193. ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
  194. GC gc;
  195. struct {
  196. int ascent;
  197. int descent;
  198. short lbearing;
  199. short rbearing;
  200. XFontSet set;
  201. } font, bfont;
  202. } DC;
  203. static void die(const char*, ...);
  204. static void draw(void);
  205. static void drawregion(int, int, int, int);
  206. static void execsh(void);
  207. static void sigchld(int);
  208. static void run(void);
  209. static bool last_draw_too_old(void);
  210. static void csidump(void);
  211. static void csihandle(void);
  212. static void csiparse(void);
  213. static void csireset(void);
  214. static void tclearregion(int, int, int, int);
  215. static void tcursor(int);
  216. static void tdeletechar(int);
  217. static void tdeleteline(int);
  218. static void tinsertblank(int);
  219. static void tinsertblankline(int);
  220. static void tmoveto(int, int);
  221. static void tnew(int, int);
  222. static void tnewline(int);
  223. static void tputtab(void);
  224. static void tputc(char*);
  225. static void treset(void);
  226. static int tresize(int, int);
  227. static void tscrollup(int, int);
  228. static void tscrolldown(int, int);
  229. static void tsetattr(int*, int);
  230. static void tsetchar(char*);
  231. static void tsetscroll(int, int);
  232. static void tswapscreen(void);
  233. static void tsetdirt(int, int);
  234. static void tfulldirt(void);
  235. static void ttynew(void);
  236. static void ttyread(void);
  237. static void ttyresize(int, int);
  238. static void ttywrite(const char *, size_t);
  239. static void xdraws(char *, Glyph, int, int, int, int);
  240. static void xhints(void);
  241. static void xclear(int, int, int, int);
  242. static void xcopy();
  243. static void xdrawcursor(void);
  244. static void xinit(void);
  245. static void xloadcols(void);
  246. static void xseturgency(int);
  247. static void xsetsel(char*);
  248. static void xresize(int, int);
  249. static void expose(XEvent *);
  250. static void visibility(XEvent *);
  251. static void unmap(XEvent *);
  252. static char* kmap(KeySym, uint);
  253. static void kpress(XEvent *);
  254. static void cmessage(XEvent *);
  255. static void resize(XEvent *);
  256. static void focus(XEvent *);
  257. static void brelease(XEvent *);
  258. static void bpress(XEvent *);
  259. static void bmotion(XEvent *);
  260. static void selnotify(XEvent *);
  261. static void selrequest(XEvent *);
  262. static void selinit(void);
  263. static inline bool selected(int, int);
  264. static void selcopy(void);
  265. static void selpaste();
  266. static void selscroll(int, int);
  267. static int utf8decode(char *, long *);
  268. static int utf8encode(long *, char *);
  269. static int utf8size(char *);
  270. static int isfullutf8(char *, int);
  271. static void (*handler[LASTEvent])(XEvent *) = {
  272. [KeyPress] = kpress,
  273. [ClientMessage] = cmessage,
  274. [ConfigureNotify] = resize,
  275. [VisibilityNotify] = visibility,
  276. [UnmapNotify] = unmap,
  277. [Expose] = expose,
  278. [FocusIn] = focus,
  279. [FocusOut] = focus,
  280. [MotionNotify] = bmotion,
  281. [ButtonPress] = bpress,
  282. [ButtonRelease] = brelease,
  283. [SelectionNotify] = selnotify,
  284. [SelectionRequest] = selrequest,
  285. };
  286. /* Globals */
  287. static DC dc;
  288. static XWindow xw;
  289. static Term term;
  290. static CSIEscape escseq;
  291. static int cmdfd;
  292. static pid_t pid;
  293. static Selection sel;
  294. static char **opt_cmd = NULL;
  295. static char *opt_title = NULL;
  296. static char *opt_embed = NULL;
  297. static char *opt_class = NULL;
  298. int
  299. utf8decode(char *s, long *u) {
  300. uchar c;
  301. int i, n, rtn;
  302. rtn = 1;
  303. c = *s;
  304. if(~c & B7) { /* 0xxxxxxx */
  305. *u = c;
  306. return rtn;
  307. } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
  308. *u = c&(B4|B3|B2|B1|B0);
  309. n = 1;
  310. } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
  311. *u = c&(B3|B2|B1|B0);
  312. n = 2;
  313. } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
  314. *u = c & (B2|B1|B0);
  315. n = 3;
  316. } else
  317. goto invalid;
  318. for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
  319. c = *s;
  320. if((c & (B7|B6)) != B7) /* 10xxxxxx */
  321. goto invalid;
  322. *u <<= 6;
  323. *u |= c & (B5|B4|B3|B2|B1|B0);
  324. }
  325. if((n == 1 && *u < 0x80) ||
  326. (n == 2 && *u < 0x800) ||
  327. (n == 3 && *u < 0x10000) ||
  328. (*u >= 0xD800 && *u <= 0xDFFF))
  329. goto invalid;
  330. return rtn;
  331. invalid:
  332. *u = 0xFFFD;
  333. return rtn;
  334. }
  335. int
  336. utf8encode(long *u, char *s) {
  337. uchar *sp;
  338. ulong uc;
  339. int i, n;
  340. sp = (uchar*) s;
  341. uc = *u;
  342. if(uc < 0x80) {
  343. *sp = uc; /* 0xxxxxxx */
  344. return 1;
  345. } else if(*u < 0x800) {
  346. *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
  347. n = 1;
  348. } else if(uc < 0x10000) {
  349. *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
  350. n = 2;
  351. } else if(uc <= 0x10FFFF) {
  352. *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
  353. n = 3;
  354. } else {
  355. goto invalid;
  356. }
  357. for(i=n,++sp; i>0; --i,++sp)
  358. *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
  359. return n+1;
  360. invalid:
  361. /* U+FFFD */
  362. *s++ = '\xEF';
  363. *s++ = '\xBF';
  364. *s = '\xBD';
  365. return 3;
  366. }
  367. /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
  368. UTF-8 otherwise return 0 */
  369. int
  370. isfullutf8(char *s, int b) {
  371. uchar *c1, *c2, *c3;
  372. c1 = (uchar *) s;
  373. c2 = (uchar *) ++s;
  374. c3 = (uchar *) ++s;
  375. if(b < 1)
  376. return 0;
  377. else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
  378. return 0;
  379. else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
  380. ((b == 1) ||
  381. ((b == 2) && (*c2&(B7|B6)) == B7)))
  382. return 0;
  383. else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
  384. ((b == 1) ||
  385. ((b == 2) && (*c2&(B7|B6)) == B7) ||
  386. ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
  387. return 0;
  388. else
  389. return 1;
  390. }
  391. int
  392. utf8size(char *s) {
  393. uchar c = *s;
  394. if(~c&B7)
  395. return 1;
  396. else if((c&(B7|B6|B5)) == (B7|B6))
  397. return 2;
  398. else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
  399. return 3;
  400. else
  401. return 4;
  402. }
  403. void
  404. selinit(void) {
  405. memset(&sel.tclick1, 0, sizeof(sel.tclick1));
  406. memset(&sel.tclick2, 0, sizeof(sel.tclick2));
  407. sel.mode = 0;
  408. sel.bx = -1;
  409. sel.clip = NULL;
  410. sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
  411. if(sel.xtarget == None)
  412. sel.xtarget = XA_STRING;
  413. }
  414. static inline bool
  415. selected(int x, int y) {
  416. if(sel.ey == y && sel.by == y) {
  417. int bx = MIN(sel.bx, sel.ex);
  418. int ex = MAX(sel.bx, sel.ex);
  419. return BETWEEN(x, bx, ex);
  420. }
  421. return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
  422. || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
  423. }
  424. void
  425. getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
  426. if(b)
  427. *b = e->xbutton.button;
  428. *x = X2COL(e->xbutton.x);
  429. *y = Y2ROW(e->xbutton.y);
  430. sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
  431. sel.b.y = MIN(sel.by, sel.ey);
  432. sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
  433. sel.e.y = MAX(sel.by, sel.ey);
  434. }
  435. void
  436. mousereport(XEvent *e) {
  437. int x = X2COL(e->xbutton.x);
  438. int y = Y2ROW(e->xbutton.y);
  439. int button = e->xbutton.button;
  440. int state = e->xbutton.state;
  441. char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
  442. static int ob, ox, oy;
  443. /* from urxvt */
  444. if(e->xbutton.type == MotionNotify) {
  445. if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
  446. return;
  447. button = ob + 32;
  448. ox = x, oy = y;
  449. } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
  450. button = 3;
  451. } else {
  452. button -= Button1;
  453. if(button >= 3)
  454. button += 64 - 3;
  455. if(e->xbutton.type == ButtonPress) {
  456. ob = button;
  457. ox = x, oy = y;
  458. }
  459. }
  460. buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
  461. + (state & Mod4Mask ? 8 : 0)
  462. + (state & ControlMask ? 16 : 0);
  463. ttywrite(buf, sizeof(buf));
  464. }
  465. void
  466. bpress(XEvent *e) {
  467. if(IS_SET(MODE_MOUSE))
  468. mousereport(e);
  469. else if(e->xbutton.button == Button1) {
  470. if(sel.bx != -1)
  471. tsetdirt(sel.b.y, sel.e.y);
  472. sel.mode = 1;
  473. sel.ex = sel.bx = X2COL(e->xbutton.x);
  474. sel.ey = sel.by = Y2ROW(e->xbutton.y);
  475. }
  476. }
  477. void
  478. selcopy(void) {
  479. char *str, *ptr;
  480. int x, y, bufsize, is_selected = 0;
  481. if(sel.bx == -1)
  482. str = NULL;
  483. else {
  484. bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
  485. ptr = str = malloc(bufsize);
  486. /* append every set & selected glyph to the selection */
  487. for(y = 0; y < term.row; y++) {
  488. for(x = 0; x < term.col; x++) {
  489. is_selected = selected(x, y);
  490. if((term.line[y][x].state & GLYPH_SET) && is_selected) {
  491. int size = utf8size(term.line[y][x].c);
  492. memcpy(ptr, term.line[y][x].c, size);
  493. ptr += size;
  494. }
  495. }
  496. /* \n at the end of every selected line except for the last one */
  497. if(is_selected && y < sel.e.y)
  498. *ptr++ = '\n';
  499. }
  500. *ptr = 0;
  501. }
  502. xsetsel(str);
  503. }
  504. void
  505. selnotify(XEvent *e) {
  506. ulong nitems, ofs, rem;
  507. int format;
  508. uchar *data;
  509. Atom type;
  510. ofs = 0;
  511. do {
  512. if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
  513. False, AnyPropertyType, &type, &format,
  514. &nitems, &rem, &data)) {
  515. fprintf(stderr, "Clipboard allocation failed\n");
  516. return;
  517. }
  518. ttywrite((const char *) data, nitems * format / 8);
  519. XFree(data);
  520. /* number of 32-bit chunks returned */
  521. ofs += nitems * format / 32;
  522. } while(rem > 0);
  523. }
  524. void
  525. selpaste() {
  526. XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
  527. }
  528. void
  529. selrequest(XEvent *e) {
  530. XSelectionRequestEvent *xsre;
  531. XSelectionEvent xev;
  532. Atom xa_targets;
  533. xsre = (XSelectionRequestEvent *) e;
  534. xev.type = SelectionNotify;
  535. xev.requestor = xsre->requestor;
  536. xev.selection = xsre->selection;
  537. xev.target = xsre->target;
  538. xev.time = xsre->time;
  539. /* reject */
  540. xev.property = None;
  541. xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
  542. if(xsre->target == xa_targets) {
  543. /* respond with the supported type */
  544. Atom string = sel.xtarget;
  545. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  546. XA_ATOM, 32, PropModeReplace,
  547. (uchar *) &string, 1);
  548. xev.property = xsre->property;
  549. } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
  550. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  551. xsre->target, 8, PropModeReplace,
  552. (uchar *) sel.clip, strlen(sel.clip));
  553. xev.property = xsre->property;
  554. }
  555. /* all done, send a notification to the listener */
  556. if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
  557. fprintf(stderr, "Error sending SelectionNotify event\n");
  558. }
  559. void
  560. xsetsel(char *str) {
  561. /* register the selection for both the clipboard and the primary */
  562. Atom clipboard;
  563. free(sel.clip);
  564. sel.clip = str;
  565. XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
  566. clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
  567. XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
  568. XFlush(xw.dpy);
  569. }
  570. void
  571. brelease(XEvent *e) {
  572. if(IS_SET(MODE_MOUSE)) {
  573. mousereport(e);
  574. return;
  575. }
  576. if(e->xbutton.button == Button2)
  577. selpaste();
  578. else if(e->xbutton.button == Button1) {
  579. sel.mode = 0;
  580. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  581. term.dirty[sel.ey] = 1;
  582. if(sel.bx == sel.ex && sel.by == sel.ey) {
  583. struct timeval now;
  584. sel.bx = -1;
  585. gettimeofday(&now, NULL);
  586. if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
  587. /* triple click on the line */
  588. sel.b.x = sel.bx = 0;
  589. sel.e.x = sel.ex = term.col;
  590. sel.b.y = sel.e.y = sel.ey;
  591. selcopy();
  592. } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
  593. /* double click to select word */
  594. sel.bx = sel.ex;
  595. while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
  596. term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
  597. sel.b.x = sel.bx;
  598. while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
  599. term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
  600. sel.e.x = sel.ex;
  601. sel.b.y = sel.e.y = sel.ey;
  602. selcopy();
  603. }
  604. } else
  605. selcopy();
  606. }
  607. memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
  608. gettimeofday(&sel.tclick1, NULL);
  609. draw();
  610. }
  611. void
  612. bmotion(XEvent *e) {
  613. if(IS_SET(MODE_MOUSE)) {
  614. mousereport(e);
  615. return;
  616. }
  617. if(sel.mode) {
  618. int oldey = sel.ey, oldex = sel.ex;
  619. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  620. if(oldey != sel.ey || oldex != sel.ex) {
  621. int starty = MIN(oldey, sel.ey);
  622. int endy = MAX(oldey, sel.ey);
  623. tsetdirt(starty, endy);
  624. draw();
  625. }
  626. }
  627. }
  628. void
  629. die(const char *errstr, ...) {
  630. va_list ap;
  631. va_start(ap, errstr);
  632. vfprintf(stderr, errstr, ap);
  633. va_end(ap);
  634. exit(EXIT_FAILURE);
  635. }
  636. void
  637. execsh(void) {
  638. char **args;
  639. char *envshell = getenv("SHELL");
  640. DEFAULT(envshell, SHELL);
  641. putenv("TERM="TNAME);
  642. args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
  643. execvp(args[0], args);
  644. exit(EXIT_FAILURE);
  645. }
  646. void
  647. sigchld(int a) {
  648. int stat = 0;
  649. if(waitpid(pid, &stat, 0) < 0)
  650. die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
  651. if(WIFEXITED(stat))
  652. exit(WEXITSTATUS(stat));
  653. else
  654. exit(EXIT_FAILURE);
  655. }
  656. void
  657. ttynew(void) {
  658. int m, s;
  659. /* seems to work fine on linux, openbsd and freebsd */
  660. struct winsize w = {term.row, term.col, 0, 0};
  661. if(openpty(&m, &s, NULL, NULL, &w) < 0)
  662. die("openpty failed: %s\n", SERRNO);
  663. switch(pid = fork()) {
  664. case -1:
  665. die("fork failed\n");
  666. break;
  667. case 0:
  668. setsid(); /* create a new process group */
  669. dup2(s, STDIN_FILENO);
  670. dup2(s, STDOUT_FILENO);
  671. dup2(s, STDERR_FILENO);
  672. if(ioctl(s, TIOCSCTTY, NULL) < 0)
  673. die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
  674. close(s);
  675. close(m);
  676. execsh();
  677. break;
  678. default:
  679. close(s);
  680. cmdfd = m;
  681. signal(SIGCHLD, sigchld);
  682. }
  683. }
  684. void
  685. dump(char c) {
  686. static int col;
  687. fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
  688. if(++col % 10 == 0)
  689. fprintf(stderr, "\n");
  690. }
  691. void
  692. ttyread(void) {
  693. static char buf[BUFSIZ];
  694. static int buflen = 0;
  695. char *ptr;
  696. char s[UTF_SIZ];
  697. int charsize; /* size of utf8 char in bytes */
  698. long utf8c;
  699. int ret;
  700. /* append read bytes to unprocessed bytes */
  701. if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
  702. die("Couldn't read from shell: %s\n", SERRNO);
  703. /* process every complete utf8 char */
  704. buflen += ret;
  705. ptr = buf;
  706. while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
  707. charsize = utf8decode(ptr, &utf8c);
  708. utf8encode(&utf8c, s);
  709. tputc(s);
  710. ptr += charsize;
  711. buflen -= charsize;
  712. }
  713. /* keep any uncomplete utf8 char for the next call */
  714. memmove(buf, ptr, buflen);
  715. }
  716. void
  717. ttywrite(const char *s, size_t n) {
  718. if(write(cmdfd, s, n) == -1)
  719. die("write error on tty: %s\n", SERRNO);
  720. }
  721. void
  722. ttyresize(int x, int y) {
  723. struct winsize w;
  724. w.ws_row = term.row;
  725. w.ws_col = term.col;
  726. w.ws_xpixel = w.ws_ypixel = 0;
  727. if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
  728. fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
  729. }
  730. void
  731. tsetdirt(int top, int bot)
  732. {
  733. int i;
  734. LIMIT(top, 0, term.row-1);
  735. LIMIT(bot, 0, term.row-1);
  736. for(i = top; i <= bot; i++)
  737. term.dirty[i] = 1;
  738. }
  739. void
  740. tfulldirt(void)
  741. {
  742. tsetdirt(0, term.row-1);
  743. }
  744. void
  745. tcursor(int mode) {
  746. static TCursor c;
  747. if(mode == CURSOR_SAVE)
  748. c = term.c;
  749. else if(mode == CURSOR_LOAD)
  750. term.c = c, tmoveto(c.x, c.y);
  751. }
  752. void
  753. treset(void) {
  754. unsigned i;
  755. term.c = (TCursor){{
  756. .mode = ATTR_NULL,
  757. .fg = DefaultFG,
  758. .bg = DefaultBG
  759. }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
  760. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  761. for (i = TAB; i < term.col; i += TAB)
  762. term.tabs[i] = 1;
  763. term.top = 0, term.bot = term.row - 1;
  764. term.mode = MODE_WRAP;
  765. tclearregion(0, 0, term.col-1, term.row-1);
  766. }
  767. void
  768. tnew(int col, int row) {
  769. /* set screen size */
  770. term.row = row, term.col = col;
  771. term.line = malloc(term.row * sizeof(Line));
  772. term.alt = malloc(term.row * sizeof(Line));
  773. term.dirty = malloc(term.row * sizeof(*term.dirty));
  774. term.tabs = malloc(term.col * sizeof(*term.tabs));
  775. for(row = 0; row < term.row; row++) {
  776. term.line[row] = malloc(term.col * sizeof(Glyph));
  777. term.alt [row] = malloc(term.col * sizeof(Glyph));
  778. term.dirty[row] = 0;
  779. }
  780. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  781. /* setup screen */
  782. treset();
  783. }
  784. void
  785. tswapscreen(void) {
  786. Line* tmp = term.line;
  787. term.line = term.alt;
  788. term.alt = tmp;
  789. term.mode ^= MODE_ALTSCREEN;
  790. tfulldirt();
  791. }
  792. void
  793. tscrolldown(int orig, int n) {
  794. int i;
  795. Line temp;
  796. LIMIT(n, 0, term.bot-orig+1);
  797. tclearregion(0, term.bot-n+1, term.col-1, term.bot);
  798. for(i = term.bot; i >= orig+n; i--) {
  799. temp = term.line[i];
  800. term.line[i] = term.line[i-n];
  801. term.line[i-n] = temp;
  802. term.dirty[i] = 1;
  803. term.dirty[i-n] = 1;
  804. }
  805. selscroll(orig, n);
  806. }
  807. void
  808. tscrollup(int orig, int n) {
  809. int i;
  810. Line temp;
  811. LIMIT(n, 0, term.bot-orig+1);
  812. tclearregion(0, orig, term.col-1, orig+n-1);
  813. for(i = orig; i <= term.bot-n; i++) {
  814. temp = term.line[i];
  815. term.line[i] = term.line[i+n];
  816. term.line[i+n] = temp;
  817. term.dirty[i] = 1;
  818. term.dirty[i+n] = 1;
  819. }
  820. selscroll(orig, -n);
  821. }
  822. void
  823. selscroll(int orig, int n) {
  824. if(sel.bx == -1)
  825. return;
  826. if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
  827. if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
  828. sel.bx = -1;
  829. return;
  830. }
  831. if(sel.by < term.top) {
  832. sel.by = term.top;
  833. sel.bx = 0;
  834. }
  835. if(sel.ey > term.bot) {
  836. sel.ey = term.bot;
  837. sel.ex = term.col;
  838. }
  839. sel.b.y = sel.by, sel.b.x = sel.bx;
  840. sel.e.y = sel.ey, sel.e.x = sel.ex;
  841. }
  842. }
  843. void
  844. tnewline(int first_col) {
  845. int y = term.c.y;
  846. if(y == term.bot)
  847. tscrollup(term.top, 1);
  848. else
  849. y++;
  850. tmoveto(first_col ? 0 : term.c.x, y);
  851. }
  852. void
  853. csiparse(void) {
  854. /* int noarg = 1; */
  855. char *p = escseq.buf;
  856. escseq.narg = 0;
  857. if(*p == '?')
  858. escseq.priv = 1, p++;
  859. while(p < escseq.buf+escseq.len) {
  860. while(isdigit(*p)) {
  861. escseq.arg[escseq.narg] *= 10;
  862. escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
  863. }
  864. if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
  865. escseq.narg++, p++;
  866. else {
  867. escseq.mode = *p;
  868. escseq.narg++;
  869. return;
  870. }
  871. }
  872. }
  873. void
  874. tmoveto(int x, int y) {
  875. LIMIT(x, 0, term.col-1);
  876. LIMIT(y, 0, term.row-1);
  877. term.c.state &= ~CURSOR_WRAPNEXT;
  878. term.c.x = x;
  879. term.c.y = y;
  880. }
  881. void
  882. tsetchar(char *c) {
  883. term.dirty[term.c.y] = 1;
  884. term.line[term.c.y][term.c.x] = term.c.attr;
  885. memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
  886. term.line[term.c.y][term.c.x].state |= GLYPH_SET;
  887. }
  888. void
  889. tclearregion(int x1, int y1, int x2, int y2) {
  890. int x, y, temp;
  891. if(x1 > x2)
  892. temp = x1, x1 = x2, x2 = temp;
  893. if(y1 > y2)
  894. temp = y1, y1 = y2, y2 = temp;
  895. LIMIT(x1, 0, term.col-1);
  896. LIMIT(x2, 0, term.col-1);
  897. LIMIT(y1, 0, term.row-1);
  898. LIMIT(y2, 0, term.row-1);
  899. for(y = y1; y <= y2; y++) {
  900. term.dirty[y] = 1;
  901. for(x = x1; x <= x2; x++)
  902. term.line[y][x].state = 0;
  903. }
  904. }
  905. void
  906. tdeletechar(int n) {
  907. int src = term.c.x + n;
  908. int dst = term.c.x;
  909. int size = term.col - src;
  910. term.dirty[term.c.y] = 1;
  911. if(src >= term.col) {
  912. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  913. return;
  914. }
  915. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  916. tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
  917. }
  918. void
  919. tinsertblank(int n) {
  920. int src = term.c.x;
  921. int dst = src + n;
  922. int size = term.col - dst;
  923. term.dirty[term.c.y] = 1;
  924. if(dst >= term.col) {
  925. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  926. return;
  927. }
  928. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  929. tclearregion(src, term.c.y, dst - 1, term.c.y);
  930. }
  931. void
  932. tinsertblankline(int n) {
  933. if(term.c.y < term.top || term.c.y > term.bot)
  934. return;
  935. tscrolldown(term.c.y, n);
  936. }
  937. void
  938. tdeleteline(int n) {
  939. if(term.c.y < term.top || term.c.y > term.bot)
  940. return;
  941. tscrollup(term.c.y, n);
  942. }
  943. void
  944. tsetattr(int *attr, int l) {
  945. int i;
  946. for(i = 0; i < l; i++) {
  947. switch(attr[i]) {
  948. case 0:
  949. term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
  950. term.c.attr.fg = DefaultFG;
  951. term.c.attr.bg = DefaultBG;
  952. break;
  953. case 1:
  954. term.c.attr.mode |= ATTR_BOLD;
  955. break;
  956. case 4:
  957. term.c.attr.mode |= ATTR_UNDERLINE;
  958. break;
  959. case 7:
  960. term.c.attr.mode |= ATTR_REVERSE;
  961. break;
  962. case 22:
  963. term.c.attr.mode &= ~ATTR_BOLD;
  964. break;
  965. case 24:
  966. term.c.attr.mode &= ~ATTR_UNDERLINE;
  967. break;
  968. case 27:
  969. term.c.attr.mode &= ~ATTR_REVERSE;
  970. break;
  971. case 38:
  972. if(i + 2 < l && attr[i + 1] == 5) {
  973. i += 2;
  974. if(BETWEEN(attr[i], 0, 255))
  975. term.c.attr.fg = attr[i];
  976. else
  977. fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
  978. }
  979. else
  980. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
  981. break;
  982. case 39:
  983. term.c.attr.fg = DefaultFG;
  984. break;
  985. case 48:
  986. if(i + 2 < l && attr[i + 1] == 5) {
  987. i += 2;
  988. if(BETWEEN(attr[i], 0, 255))
  989. term.c.attr.bg = attr[i];
  990. else
  991. fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
  992. }
  993. else
  994. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
  995. break;
  996. case 49:
  997. term.c.attr.bg = DefaultBG;
  998. break;
  999. default:
  1000. if(BETWEEN(attr[i], 30, 37))
  1001. term.c.attr.fg = attr[i] - 30;
  1002. else if(BETWEEN(attr[i], 40, 47))
  1003. term.c.attr.bg = attr[i] - 40;
  1004. else if(BETWEEN(attr[i], 90, 97))
  1005. term.c.attr.fg = attr[i] - 90 + 8;
  1006. else if(BETWEEN(attr[i], 100, 107))
  1007. term.c.attr.fg = attr[i] - 100 + 8;
  1008. else
  1009. fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
  1010. break;
  1011. }
  1012. }
  1013. }
  1014. void
  1015. tsetscroll(int t, int b) {
  1016. int temp;
  1017. LIMIT(t, 0, term.row-1);
  1018. LIMIT(b, 0, term.row-1);
  1019. if(t > b) {
  1020. temp = t;
  1021. t = b;
  1022. b = temp;
  1023. }
  1024. term.top = t;
  1025. term.bot = b;
  1026. }
  1027. void
  1028. csihandle(void) {
  1029. switch(escseq.mode) {
  1030. default:
  1031. unknown:
  1032. fprintf(stderr, "erresc: unknown csi ");
  1033. csidump();
  1034. /* die(""); */
  1035. break;
  1036. case '@': /* ICH -- Insert <n> blank char */
  1037. DEFAULT(escseq.arg[0], 1);
  1038. tinsertblank(escseq.arg[0]);
  1039. break;
  1040. case 'A': /* CUU -- Cursor <n> Up */
  1041. case 'e':
  1042. DEFAULT(escseq.arg[0], 1);
  1043. tmoveto(term.c.x, term.c.y-escseq.arg[0]);
  1044. break;
  1045. case 'B': /* CUD -- Cursor <n> Down */
  1046. DEFAULT(escseq.arg[0], 1);
  1047. tmoveto(term.c.x, term.c.y+escseq.arg[0]);
  1048. break;
  1049. case 'C': /* CUF -- Cursor <n> Forward */
  1050. case 'a':
  1051. DEFAULT(escseq.arg[0], 1);
  1052. tmoveto(term.c.x+escseq.arg[0], term.c.y);
  1053. break;
  1054. case 'D': /* CUB -- Cursor <n> Backward */
  1055. DEFAULT(escseq.arg[0], 1);
  1056. tmoveto(term.c.x-escseq.arg[0], term.c.y);
  1057. break;
  1058. case 'E': /* CNL -- Cursor <n> Down and first col */
  1059. DEFAULT(escseq.arg[0], 1);
  1060. tmoveto(0, term.c.y+escseq.arg[0]);
  1061. break;
  1062. case 'F': /* CPL -- Cursor <n> Up and first col */
  1063. DEFAULT(escseq.arg[0], 1);
  1064. tmoveto(0, term.c.y-escseq.arg[0]);
  1065. break;
  1066. case 'g': /* TBC -- Tabulation clear */
  1067. switch (escseq.arg[0]) {
  1068. case 0: /* clear current tab stop */
  1069. term.tabs[term.c.x] = 0;
  1070. break;
  1071. case 3: /* clear all the tabs */
  1072. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  1073. break;
  1074. default:
  1075. goto unknown;
  1076. }
  1077. break;
  1078. case 'G': /* CHA -- Move to <col> */
  1079. case '`': /* XXX: HPA -- same? */
  1080. DEFAULT(escseq.arg[0], 1);
  1081. tmoveto(escseq.arg[0]-1, term.c.y);
  1082. break;
  1083. case 'H': /* CUP -- Move to <row> <col> */
  1084. case 'f': /* XXX: HVP -- same? */
  1085. DEFAULT(escseq.arg[0], 1);
  1086. DEFAULT(escseq.arg[1], 1);
  1087. tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
  1088. break;
  1089. case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
  1090. DEFAULT(escseq.arg[0], 1);
  1091. while (escseq.arg[0]--)
  1092. tputtab();
  1093. break;
  1094. case 'J': /* ED -- Clear screen */
  1095. sel.bx = -1;
  1096. switch(escseq.arg[0]) {
  1097. case 0: /* below */
  1098. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1099. if(term.c.y < term.row-1)
  1100. tclearregion(0, term.c.y+1, term.col-1, term.row-1);
  1101. break;
  1102. case 1: /* above */
  1103. if(term.c.y > 1)
  1104. tclearregion(0, 0, term.col-1, term.c.y-1);
  1105. tclearregion(0, term.c.y, term.c.x, term.c.y);
  1106. break;
  1107. case 2: /* all */
  1108. tclearregion(0, 0, term.col-1, term.row-1);
  1109. break;
  1110. default:
  1111. goto unknown;
  1112. }
  1113. break;
  1114. case 'K': /* EL -- Clear line */
  1115. switch(escseq.arg[0]) {
  1116. case 0: /* right */
  1117. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1118. break;
  1119. case 1: /* left */
  1120. tclearregion(0, term.c.y, term.c.x, term.c.y);
  1121. break;
  1122. case 2: /* all */
  1123. tclearregion(0, term.c.y, term.col-1, term.c.y);
  1124. break;
  1125. }
  1126. break;
  1127. case 'S': /* SU -- Scroll <n> line up */
  1128. DEFAULT(escseq.arg[0], 1);
  1129. tscrollup(term.top, escseq.arg[0]);
  1130. break;
  1131. case 'T': /* SD -- Scroll <n> line down */
  1132. DEFAULT(escseq.arg[0], 1);
  1133. tscrolldown(term.top, escseq.arg[0]);
  1134. break;
  1135. case 'L': /* IL -- Insert <n> blank lines */
  1136. DEFAULT(escseq.arg[0], 1);
  1137. tinsertblankline(escseq.arg[0]);
  1138. break;
  1139. case 'l': /* RM -- Reset Mode */
  1140. if(escseq.priv) {
  1141. switch(escseq.arg[0]) {
  1142. case 1:
  1143. term.mode &= ~MODE_APPKEYPAD;
  1144. break;
  1145. case 5: /* DECSCNM -- Remove reverse 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 12: /* att610 -- Stop blinking cursor (IGNORED) */
  1155. break;
  1156. case 20:
  1157. term.mode &= ~MODE_CRLF;
  1158. break;
  1159. case 25:
  1160. term.c.state |= CURSOR_HIDE;
  1161. break;
  1162. case 1000: /* disable X11 xterm mouse reporting */
  1163. term.mode &= ~MODE_MOUSEBTN;
  1164. break;
  1165. case 1002:
  1166. term.mode &= ~MODE_MOUSEMOTION;
  1167. break;
  1168. case 1049: /* = 1047 and 1048 */
  1169. case 47:
  1170. case 1047:
  1171. if(IS_SET(MODE_ALTSCREEN)) {
  1172. tclearregion(0, 0, term.col-1, term.row-1);
  1173. tswapscreen();
  1174. }
  1175. if(escseq.arg[0] != 1049)
  1176. break;
  1177. case 1048:
  1178. tcursor(CURSOR_LOAD);
  1179. break;
  1180. default:
  1181. goto unknown;
  1182. }
  1183. } else {
  1184. switch(escseq.arg[0]) {
  1185. case 4:
  1186. term.mode &= ~MODE_INSERT;
  1187. break;
  1188. default:
  1189. goto unknown;
  1190. }
  1191. }
  1192. break;
  1193. case 'M': /* DL -- Delete <n> lines */
  1194. DEFAULT(escseq.arg[0], 1);
  1195. tdeleteline(escseq.arg[0]);
  1196. break;
  1197. case 'X': /* ECH -- Erase <n> char */
  1198. DEFAULT(escseq.arg[0], 1);
  1199. tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
  1200. break;
  1201. case 'P': /* DCH -- Delete <n> char */
  1202. DEFAULT(escseq.arg[0], 1);
  1203. tdeletechar(escseq.arg[0]);
  1204. break;
  1205. /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
  1206. case 'd': /* VPA -- Move to <row> */
  1207. DEFAULT(escseq.arg[0], 1);
  1208. tmoveto(term.c.x, escseq.arg[0]-1);
  1209. break;
  1210. case 'h': /* SM -- Set terminal mode */
  1211. if(escseq.priv) {
  1212. switch(escseq.arg[0]) {
  1213. case 1:
  1214. term.mode |= MODE_APPKEYPAD;
  1215. break;
  1216. case 5: /* DECSCNM -- Reverve video */
  1217. if(!IS_SET(MODE_REVERSE)) {
  1218. term.mode |= MODE_REVERSE;
  1219. draw();
  1220. }
  1221. break;
  1222. case 7:
  1223. term.mode |= MODE_WRAP;
  1224. break;
  1225. case 20:
  1226. term.mode |= MODE_CRLF;
  1227. break;
  1228. case 12: /* att610 -- Start blinking cursor (IGNORED) */
  1229. /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
  1230. if(escseq.narg > 1 && escseq.arg[1] != 25)
  1231. break;
  1232. case 25:
  1233. term.c.state &= ~CURSOR_HIDE;
  1234. break;
  1235. case 1000: /* 1000,1002: enable xterm mouse report */
  1236. term.mode |= MODE_MOUSEBTN;
  1237. break;
  1238. case 1002:
  1239. term.mode |= MODE_MOUSEMOTION;
  1240. break;
  1241. case 1049: /* = 1047 and 1048 */
  1242. case 47:
  1243. case 1047:
  1244. if(IS_SET(MODE_ALTSCREEN))
  1245. tclearregion(0, 0, term.col-1, term.row-1);
  1246. else
  1247. tswapscreen();
  1248. if(escseq.arg[0] != 1049)
  1249. break;
  1250. case 1048:
  1251. tcursor(CURSOR_SAVE);
  1252. break;
  1253. default: goto unknown;
  1254. }
  1255. } else {
  1256. switch(escseq.arg[0]) {
  1257. case 4:
  1258. term.mode |= MODE_INSERT;
  1259. break;
  1260. default: goto unknown;
  1261. }
  1262. };
  1263. break;
  1264. case 'm': /* SGR -- Terminal attribute (color) */
  1265. tsetattr(escseq.arg, escseq.narg);
  1266. break;
  1267. case 'r': /* DECSTBM -- Set Scrolling Region */
  1268. if(escseq.priv)
  1269. goto unknown;
  1270. else {
  1271. DEFAULT(escseq.arg[0], 1);
  1272. DEFAULT(escseq.arg[1], term.row);
  1273. tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
  1274. tmoveto(0, 0);
  1275. }
  1276. break;
  1277. case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
  1278. tcursor(CURSOR_SAVE);
  1279. break;
  1280. case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
  1281. tcursor(CURSOR_LOAD);
  1282. break;
  1283. }
  1284. }
  1285. void
  1286. csidump(void) {
  1287. int i;
  1288. printf("ESC[");
  1289. for(i = 0; i < escseq.len; i++) {
  1290. uint c = escseq.buf[i] & 0xff;
  1291. if(isprint(c)) putchar(c);
  1292. else if(c == '\n') printf("(\\n)");
  1293. else if(c == '\r') printf("(\\r)");
  1294. else if(c == 0x1b) printf("(\\e)");
  1295. else printf("(%02x)", c);
  1296. }
  1297. putchar('\n');
  1298. }
  1299. void
  1300. csireset(void) {
  1301. memset(&escseq, 0, sizeof(escseq));
  1302. }
  1303. void
  1304. tputtab(void) {
  1305. unsigned x;
  1306. for (x = term.c.x + 1; x < term.col && !term.tabs[x]; ++x)
  1307. /* nothing */ ;
  1308. tmoveto(x, term.c.y);
  1309. }
  1310. void
  1311. tputc(char *c) {
  1312. char ascii = *c;
  1313. if(term.esc & ESC_START) {
  1314. if(term.esc & ESC_CSI) {
  1315. escseq.buf[escseq.len++] = ascii;
  1316. if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
  1317. term.esc = 0;
  1318. csiparse(), csihandle();
  1319. }
  1320. /* TODO: handle other OSC */
  1321. } else if(term.esc & ESC_OSC) {
  1322. if(ascii == ';') {
  1323. term.titlelen = 0;
  1324. term.esc = ESC_START | ESC_TITLE;
  1325. }
  1326. } else if(term.esc & ESC_TITLE) {
  1327. if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
  1328. term.esc = 0;
  1329. term.title[term.titlelen] = '\0';
  1330. XStoreName(xw.dpy, xw.win, term.title);
  1331. } else {
  1332. term.title[term.titlelen++] = ascii;
  1333. }
  1334. } else if(term.esc & ESC_ALTCHARSET) {
  1335. switch(ascii) {
  1336. case '0': /* Line drawing crap */
  1337. term.c.attr.mode |= ATTR_GFX;
  1338. break;
  1339. case 'B': /* Back to regular text */
  1340. term.c.attr.mode &= ~ATTR_GFX;
  1341. break;
  1342. default:
  1343. fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
  1344. }
  1345. term.esc = 0;
  1346. } else {
  1347. switch(ascii) {
  1348. case '[':
  1349. term.esc |= ESC_CSI;
  1350. break;
  1351. case ']':
  1352. term.esc |= ESC_OSC;
  1353. break;
  1354. case '(':
  1355. term.esc |= ESC_ALTCHARSET;
  1356. break;
  1357. case 'D': /* IND -- Linefeed */
  1358. if(term.c.y == term.bot)
  1359. tscrollup(term.top, 1);
  1360. else
  1361. tmoveto(term.c.x, term.c.y+1);
  1362. term.esc = 0;
  1363. break;
  1364. case 'E': /* NEL -- Next line */
  1365. tnewline(1); /* always go to first col */
  1366. term.esc = 0;
  1367. break;
  1368. case 'H': /* HTS -- Horizontal tab stop */
  1369. term.tabs[term.c.x] = 1;
  1370. term.esc = 0;
  1371. break;
  1372. case 'M': /* RI -- Reverse index */
  1373. if(term.c.y == term.top)
  1374. tscrolldown(term.top, 1);
  1375. else
  1376. tmoveto(term.c.x, term.c.y-1);
  1377. term.esc = 0;
  1378. break;
  1379. case 'c': /* RIS -- Reset to inital state */
  1380. treset();
  1381. term.esc = 0;
  1382. break;
  1383. case '=': /* DECPAM -- Application keypad */
  1384. term.mode |= MODE_APPKEYPAD;
  1385. term.esc = 0;
  1386. break;
  1387. case '>': /* DECPNM -- Normal keypad */
  1388. term.mode &= ~MODE_APPKEYPAD;
  1389. term.esc = 0;
  1390. break;
  1391. case '7': /* DECSC -- Save Cursor */
  1392. tcursor(CURSOR_SAVE);
  1393. term.esc = 0;
  1394. break;
  1395. case '8': /* DECRC -- Restore Cursor */
  1396. tcursor(CURSOR_LOAD);
  1397. term.esc = 0;
  1398. break;
  1399. default:
  1400. fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
  1401. (uchar) ascii, isprint(ascii)?ascii:'.');
  1402. term.esc = 0;
  1403. }
  1404. }
  1405. } else {
  1406. if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
  1407. sel.bx = -1;
  1408. switch(ascii) {
  1409. case '\t':
  1410. tputtab();
  1411. break;
  1412. case '\b':
  1413. tmoveto(term.c.x-1, term.c.y);
  1414. break;
  1415. case '\r':
  1416. tmoveto(0, term.c.y);
  1417. break;
  1418. case '\f':
  1419. case '\v':
  1420. case '\n':
  1421. /* go to first col if the mode is set */
  1422. tnewline(IS_SET(MODE_CRLF));
  1423. break;
  1424. case '\a':
  1425. if(!(xw.state & WIN_FOCUSED))
  1426. xseturgency(1);
  1427. break;
  1428. case '\033':
  1429. csireset();
  1430. term.esc = ESC_START;
  1431. break;
  1432. default:
  1433. if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
  1434. tnewline(1); /* always go to first col */
  1435. tsetchar(c);
  1436. if(term.c.x+1 < term.col)
  1437. tmoveto(term.c.x+1, term.c.y);
  1438. else
  1439. term.c.state |= CURSOR_WRAPNEXT;
  1440. }
  1441. }
  1442. }
  1443. int
  1444. tresize(int col, int row) {
  1445. int i, x;
  1446. int minrow = MIN(row, term.row);
  1447. int mincol = MIN(col, term.col);
  1448. int slide = term.c.y - row + 1;
  1449. if(col < 1 || row < 1)
  1450. return 0;
  1451. /* free unneeded rows */
  1452. i = 0;
  1453. if(slide > 0) {
  1454. /* slide screen to keep cursor where we expect it -
  1455. * tscrollup would work here, but we can optimize to
  1456. * memmove because we're freeing the earlier lines */
  1457. for(/* i = 0 */; i < slide; i++) {
  1458. free(term.line[i]);
  1459. free(term.alt[i]);
  1460. }
  1461. memmove(term.line, term.line + slide, row * sizeof(Line));
  1462. memmove(term.alt, term.alt + slide, row * sizeof(Line));
  1463. }
  1464. for(i += row; i < term.row; i++) {
  1465. free(term.line[i]);
  1466. free(term.alt[i]);
  1467. }
  1468. /* resize to new height */
  1469. term.line = realloc(term.line, row * sizeof(Line));
  1470. term.alt = realloc(term.alt, row * sizeof(Line));
  1471. term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
  1472. term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
  1473. /* resize each row to new width, zero-pad if needed */
  1474. for(i = 0; i < minrow; i++) {
  1475. term.dirty[i] = 1;
  1476. term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
  1477. term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
  1478. for(x = mincol; x < col; x++) {
  1479. term.line[i][x].state = 0;
  1480. term.alt[i][x].state = 0;
  1481. }
  1482. }
  1483. /* allocate any new rows */
  1484. for(/* i == minrow */; i < row; i++) {
  1485. term.dirty[i] = 1;
  1486. term.line[i] = calloc(col, sizeof(Glyph));
  1487. term.alt [i] = calloc(col, sizeof(Glyph));
  1488. }
  1489. if (col > term.col) {
  1490. bool *bp = term.tabs + term.col;
  1491. memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
  1492. while (--bp > term.tabs && !*bp)
  1493. /* nothing */ ;
  1494. for (bp += TAB; bp < term.tabs + col; bp += TAB)
  1495. *bp = 1;
  1496. }
  1497. /* update terminal size */
  1498. term.col = col, term.row = row;
  1499. /* make use of the LIMIT in tmoveto */
  1500. tmoveto(term.c.x, term.c.y);
  1501. /* reset scrolling region */
  1502. tsetscroll(0, row-1);
  1503. return (slide > 0);
  1504. }
  1505. void
  1506. xresize(int col, int row) {
  1507. xw.w = MAX(1, 2*BORDER + col * xw.cw);
  1508. xw.h = MAX(1, 2*BORDER + row * xw.ch);
  1509. }
  1510. void
  1511. xloadcols(void) {
  1512. int i, r, g, b;
  1513. XColor color;
  1514. ulong white = WhitePixel(xw.dpy, xw.scr);
  1515. /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
  1516. for(i = 0; i < LEN(colorname); i++) {
  1517. if(!colorname[i])
  1518. continue;
  1519. if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
  1520. dc.col[i] = white;
  1521. fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
  1522. } else
  1523. dc.col[i] = color.pixel;
  1524. }
  1525. /* load colors [16-255] ; same colors as xterm */
  1526. for(i = 16, r = 0; r < 6; r++)
  1527. for(g = 0; g < 6; g++)
  1528. for(b = 0; b < 6; b++) {
  1529. color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
  1530. color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
  1531. color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
  1532. if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1533. dc.col[i] = white;
  1534. fprintf(stderr, "Could not allocate color %d\n", i);
  1535. } else
  1536. dc.col[i] = color.pixel;
  1537. i++;
  1538. }
  1539. for(r = 0; r < 24; r++, i++) {
  1540. color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
  1541. if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1542. dc.col[i] = white;
  1543. fprintf(stderr, "Could not allocate color %d\n", i);
  1544. } else
  1545. dc.col[i] = color.pixel;
  1546. }
  1547. }
  1548. void
  1549. xclear(int x1, int y1, int x2, int y2) {
  1550. XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
  1551. XFillRectangle(xw.dpy, xw.buf, dc.gc,
  1552. BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
  1553. (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
  1554. }
  1555. void
  1556. xhints(void) {
  1557. XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
  1558. XWMHints wm = {.flags = InputHint, .input = 1};
  1559. XSizeHints size = {
  1560. .flags = PSize | PResizeInc | PBaseSize,
  1561. .height = xw.h,
  1562. .width = xw.w,
  1563. .height_inc = xw.ch,
  1564. .width_inc = xw.cw,
  1565. .base_height = 2*BORDER,
  1566. .base_width = 2*BORDER,
  1567. };
  1568. XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
  1569. }
  1570. XFontSet
  1571. xinitfont(char *fontstr) {
  1572. XFontSet set;
  1573. char *def, **missing;
  1574. int n;
  1575. missing = NULL;
  1576. set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
  1577. if(missing) {
  1578. while(n--)
  1579. fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
  1580. XFreeStringList(missing);
  1581. }
  1582. return set;
  1583. }
  1584. void
  1585. xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
  1586. XFontStruct **xfonts;
  1587. char **font_names;
  1588. int i, n;
  1589. *ascent = *descent = *lbearing = *rbearing = 0;
  1590. n = XFontsOfFontSet(set, &xfonts, &font_names);
  1591. for(i = 0; i < n; i++) {
  1592. *ascent = MAX(*ascent, (*xfonts)->ascent);
  1593. *descent = MAX(*descent, (*xfonts)->descent);
  1594. *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
  1595. *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
  1596. xfonts++;
  1597. }
  1598. }
  1599. void
  1600. initfonts(char *fontstr, char *bfontstr) {
  1601. if((dc.font.set = xinitfont(fontstr)) == NULL ||
  1602. (dc.bfont.set = xinitfont(bfontstr)) == NULL)
  1603. die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
  1604. xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
  1605. &dc.font.lbearing, &dc.font.rbearing);
  1606. xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
  1607. &dc.bfont.lbearing, &dc.bfont.rbearing);
  1608. }
  1609. void
  1610. xinit(void) {
  1611. XSetWindowAttributes attrs;
  1612. Cursor cursor;
  1613. Window parent;
  1614. if(!(xw.dpy = XOpenDisplay(NULL)))
  1615. die("Can't open display\n");
  1616. xw.scr = XDefaultScreen(xw.dpy);
  1617. /* font */
  1618. initfonts(FONT, BOLDFONT);
  1619. /* XXX: Assuming same size for bold font */
  1620. xw.cw = dc.font.rbearing - dc.font.lbearing;
  1621. xw.ch = dc.font.ascent + dc.font.descent;
  1622. /* colors */
  1623. xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
  1624. xloadcols();
  1625. /* window - default size */
  1626. xw.h = 2*BORDER + term.row * xw.ch;
  1627. xw.w = 2*BORDER + term.col * xw.cw;
  1628. attrs.background_pixel = dc.col[DefaultBG];
  1629. attrs.border_pixel = dc.col[DefaultBG];
  1630. attrs.bit_gravity = NorthWestGravity;
  1631. attrs.event_mask = FocusChangeMask | KeyPressMask
  1632. | ExposureMask | VisibilityChangeMask | StructureNotifyMask
  1633. | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
  1634. | EnterWindowMask | LeaveWindowMask;
  1635. attrs.colormap = xw.cmap;
  1636. parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
  1637. xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
  1638. xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
  1639. XDefaultVisual(xw.dpy, xw.scr),
  1640. CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
  1641. | CWColormap,
  1642. &attrs);
  1643. xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
  1644. /* input methods */
  1645. xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
  1646. xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
  1647. | XIMStatusNothing, XNClientWindow, xw.win,
  1648. XNFocusWindow, xw.win, NULL);
  1649. /* gc */
  1650. dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
  1651. /* white cursor, black outline */
  1652. cursor = XCreateFontCursor(xw.dpy, XC_xterm);
  1653. XDefineCursor(xw.dpy, xw.win, cursor);
  1654. XRecolorCursor(xw.dpy, cursor,
  1655. &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
  1656. &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
  1657. xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
  1658. XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
  1659. XMapWindow(xw.dpy, xw.win);
  1660. xhints();
  1661. XSync(xw.dpy, 0);
  1662. }
  1663. void
  1664. xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
  1665. int fg = base.fg, bg = base.bg, temp;
  1666. int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
  1667. XFontSet fontset = dc.font.set;
  1668. int i;
  1669. /* only switch default fg/bg if term is in RV mode */
  1670. if(IS_SET(MODE_REVERSE)) {
  1671. if(fg == DefaultFG)
  1672. fg = DefaultBG;
  1673. if(bg == DefaultBG)
  1674. bg = DefaultFG;
  1675. }
  1676. if(base.mode & ATTR_REVERSE)
  1677. temp = fg, fg = bg, bg = temp;
  1678. if(base.mode & ATTR_BOLD) {
  1679. fg += 8;
  1680. fontset = dc.bfont.set;
  1681. }
  1682. XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
  1683. XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
  1684. if(base.mode & ATTR_GFX) {
  1685. for(i = 0; i < bytelen; i++) {
  1686. char c = gfx[(uint)s[i] % 256];
  1687. if(c)
  1688. s[i] = c;
  1689. else if(s[i] > 0x5f)
  1690. s[i] -= 0x5f;
  1691. }
  1692. }
  1693. XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
  1694. if(base.mode & ATTR_UNDERLINE)
  1695. XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
  1696. }
  1697. /* copy buffer pixmap to screen pixmap */
  1698. void
  1699. xcopy() {
  1700. XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
  1701. XdbeSwapBuffers(xw.dpy, swpinfo, 1);
  1702. }
  1703. void
  1704. xdrawcursor(void) {
  1705. static int oldx = 0;
  1706. static int oldy = 0;
  1707. int sl;
  1708. Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
  1709. LIMIT(oldx, 0, term.col-1);
  1710. LIMIT(oldy, 0, term.row-1);
  1711. if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
  1712. memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
  1713. /* remove the old cursor */
  1714. if(term.line[oldy][oldx].state & GLYPH_SET) {
  1715. sl = utf8size(term.line[oldy][oldx].c);
  1716. xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
  1717. } else
  1718. xclear(oldx, oldy, oldx, oldy);
  1719. xcopy(oldx, oldy, 1, 1);
  1720. /* draw the new one */
  1721. if(!(term.c.state & CURSOR_HIDE)) {
  1722. if(!(xw.state & WIN_FOCUSED))
  1723. g.bg = DefaultUCS;
  1724. if(IS_SET(MODE_REVERSE))
  1725. g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
  1726. sl = utf8size(g.c);
  1727. xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
  1728. oldx = term.c.x, oldy = term.c.y;
  1729. }
  1730. xcopy(term.c.x, term.c.y, 1, 1);
  1731. }
  1732. void
  1733. draw() {
  1734. drawregion(0, 0, term.col, term.row);
  1735. xcopy();
  1736. gettimeofday(&xw.lastdraw, NULL);
  1737. }
  1738. void
  1739. drawregion(int x1, int y1, int x2, int y2) {
  1740. int ic, ib, x, y, ox, sl;
  1741. Glyph base, new;
  1742. char buf[DRAW_BUF_SIZ];
  1743. if(!(xw.state & WIN_VISIBLE))
  1744. return;
  1745. for(y = y1; y < y2; y++) {
  1746. if(!term.dirty[y])
  1747. continue;
  1748. xclear(0, y, term.col, y);
  1749. term.dirty[y] = 0;
  1750. base = term.line[y][0];
  1751. ic = ib = ox = 0;
  1752. for(x = x1; x < x2; x++) {
  1753. new = term.line[y][x];
  1754. if(sel.bx != -1 && *(new.c) && selected(x, y))
  1755. new.mode ^= ATTR_REVERSE;
  1756. if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
  1757. ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
  1758. xdraws(buf, base, ox, y, ic, ib);
  1759. ic = ib = 0;
  1760. }
  1761. if(new.state & GLYPH_SET) {
  1762. if(ib == 0) {
  1763. ox = x;
  1764. base = new;
  1765. }
  1766. sl = utf8size(new.c);
  1767. memcpy(buf+ib, new.c, sl);
  1768. ib += sl;
  1769. ++ic;
  1770. }
  1771. }
  1772. if(ib > 0)
  1773. xdraws(buf, base, ox, y, ic, ib);
  1774. }
  1775. xdrawcursor();
  1776. }
  1777. void
  1778. expose(XEvent *ev) {
  1779. XExposeEvent *e = &ev->xexpose;
  1780. if(xw.state & WIN_REDRAW) {
  1781. if(!e->count)
  1782. xw.state &= ~WIN_REDRAW;
  1783. }
  1784. xcopy();
  1785. }
  1786. void
  1787. visibility(XEvent *ev) {
  1788. XVisibilityEvent *e = &ev->xvisibility;
  1789. if(e->state == VisibilityFullyObscured)
  1790. xw.state &= ~WIN_VISIBLE;
  1791. else if(!(xw.state & WIN_VISIBLE))
  1792. /* need a full redraw for next Expose, not just a buf copy */
  1793. xw.state |= WIN_VISIBLE | WIN_REDRAW;
  1794. }
  1795. void
  1796. unmap(XEvent *ev) {
  1797. xw.state &= ~WIN_VISIBLE;
  1798. }
  1799. void
  1800. xseturgency(int add) {
  1801. XWMHints *h = XGetWMHints(xw.dpy, xw.win);
  1802. h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
  1803. XSetWMHints(xw.dpy, xw.win, h);
  1804. XFree(h);
  1805. }
  1806. void
  1807. focus(XEvent *ev) {
  1808. if(ev->type == FocusIn) {
  1809. xw.state |= WIN_FOCUSED;
  1810. xseturgency(0);
  1811. } else
  1812. xw.state &= ~WIN_FOCUSED;
  1813. draw();
  1814. }
  1815. char*
  1816. kmap(KeySym k, uint state) {
  1817. int i;
  1818. state &= ~Mod2Mask;
  1819. for(i = 0; i < LEN(key); i++) {
  1820. uint mask = key[i].mask;
  1821. if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
  1822. return (char*)key[i].s;
  1823. }
  1824. return NULL;
  1825. }
  1826. void
  1827. kpress(XEvent *ev) {
  1828. XKeyEvent *e = &ev->xkey;
  1829. KeySym ksym;
  1830. char buf[32];
  1831. char *customkey;
  1832. int len;
  1833. int meta;
  1834. int shift;
  1835. Status status;
  1836. meta = e->state & Mod1Mask;
  1837. shift = e->state & ShiftMask;
  1838. len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
  1839. /* 1. custom keys from config.h */
  1840. if((customkey = kmap(ksym, e->state)))
  1841. ttywrite(customkey, strlen(customkey));
  1842. /* 2. hardcoded (overrides X lookup) */
  1843. else
  1844. switch(ksym) {
  1845. case XK_Up:
  1846. case XK_Down:
  1847. case XK_Left:
  1848. case XK_Right:
  1849. /* XXX: shift up/down doesn't work */
  1850. sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
  1851. ttywrite(buf, 3);
  1852. break;
  1853. case XK_Insert:
  1854. if(shift)
  1855. selpaste();
  1856. break;
  1857. case XK_Return:
  1858. if(IS_SET(MODE_CRLF))
  1859. ttywrite("\r\n", 2);
  1860. else
  1861. ttywrite("\r", 1);
  1862. break;
  1863. /* 3. X lookup */
  1864. default:
  1865. if(len > 0) {
  1866. if(meta && len == 1)
  1867. ttywrite("\033", 1);
  1868. ttywrite(buf, len);
  1869. }
  1870. break;
  1871. }
  1872. }
  1873. void
  1874. cmessage(XEvent *e) {
  1875. /* See xembed specs
  1876. http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
  1877. if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
  1878. if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
  1879. xw.state |= WIN_FOCUSED;
  1880. xseturgency(0);
  1881. } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
  1882. xw.state &= ~WIN_FOCUSED;
  1883. }
  1884. draw();
  1885. }
  1886. }
  1887. void
  1888. resize(XEvent *e) {
  1889. int col, row;
  1890. if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
  1891. return;
  1892. xw.w = e->xconfigure.width;
  1893. xw.h = e->xconfigure.height;
  1894. col = (xw.w - 2*BORDER) / xw.cw;
  1895. row = (xw.h - 2*BORDER) / xw.ch;
  1896. if(col == term.col && row == term.row)
  1897. return;
  1898. if(tresize(col, row))
  1899. draw();
  1900. ttyresize(col, row);
  1901. xresize(col, row);
  1902. }
  1903. bool
  1904. last_draw_too_old(void) {
  1905. struct timeval now;
  1906. gettimeofday(&now, NULL);
  1907. return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
  1908. }
  1909. void
  1910. run(void) {
  1911. XEvent ev;
  1912. fd_set rfd;
  1913. int xfd = XConnectionNumber(xw.dpy);
  1914. struct timeval timeout = {0};
  1915. bool stuff_to_print = 0;
  1916. for(;;) {
  1917. FD_ZERO(&rfd);
  1918. FD_SET(cmdfd, &rfd);
  1919. FD_SET(xfd, &rfd);
  1920. timeout.tv_sec = 0;
  1921. timeout.tv_usec = SELECT_TIMEOUT;
  1922. if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
  1923. if(errno == EINTR)
  1924. continue;
  1925. die("select failed: %s\n", SERRNO);
  1926. }
  1927. if(FD_ISSET(cmdfd, &rfd)) {
  1928. ttyread();
  1929. stuff_to_print = 1;
  1930. }
  1931. if(stuff_to_print && last_draw_too_old()) {
  1932. stuff_to_print = 0;
  1933. draw();
  1934. }
  1935. while(XPending(xw.dpy)) {
  1936. XNextEvent(xw.dpy, &ev);
  1937. if(XFilterEvent(&ev, xw.win))
  1938. continue;
  1939. if(handler[ev.type])
  1940. (handler[ev.type])(&ev);
  1941. }
  1942. }
  1943. }
  1944. int
  1945. main(int argc, char *argv[]) {
  1946. int i;
  1947. for(i = 1; i < argc; i++) {
  1948. switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
  1949. case 't':
  1950. if(++i < argc) opt_title = argv[i];
  1951. break;
  1952. case 'c':
  1953. if(++i < argc) opt_class = argv[i];
  1954. break;
  1955. case 'w':
  1956. if(++i < argc) opt_embed = argv[i];
  1957. break;
  1958. case 'e':
  1959. /* eat every remaining arguments */
  1960. if(++i < argc) opt_cmd = &argv[i];
  1961. goto run;
  1962. case 'v':
  1963. default:
  1964. die(USAGE);
  1965. }
  1966. }
  1967. run:
  1968. setlocale(LC_CTYPE, "");
  1969. tnew(80, 24);
  1970. ttynew();
  1971. xinit();
  1972. selinit();
  1973. run();
  1974. return 0;
  1975. }