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. #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] [-g geometry]" \
  38. " [-w windowid] [-v] [-f file] [-e command...]\n"
  39. /* XEMBED messages */
  40. #define XEMBED_FOCUS_IN 4
  41. #define XEMBED_FOCUS_OUT 5
  42. /* Arbitrary sizes */
  43. #define ESC_BUF_SIZ 256
  44. #define ESC_ARG_SIZ 16
  45. #define STR_BUF_SIZ 256
  46. #define STR_ARG_SIZ 16
  47. #define DRAW_BUF_SIZ 1024
  48. #define UTF_SIZ 4
  49. #define XK_NO_MOD UINT_MAX
  50. #define XK_ANY_MOD 0
  51. #define SELECT_TIMEOUT (20*1000) /* 20 ms */
  52. #define DRAW_TIMEOUT (20*1000) /* 20 ms */
  53. #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
  54. #define SERRNO strerror(errno)
  55. #define MIN(a, b) ((a) < (b) ? (a) : (b))
  56. #define MAX(a, b) ((a) < (b) ? (b) : (a))
  57. #define LEN(a) (sizeof(a) / sizeof(a[0]))
  58. #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
  59. #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
  60. #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  61. #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  62. #define IS_SET(flag) (term.mode & (flag))
  63. #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
  64. #define X2COL(x) (((x) - BORDER)/xw.cw)
  65. #define Y2ROW(y) (((y) - BORDER)/xw.ch)
  66. enum glyph_attribute {
  67. ATTR_NULL = 0,
  68. ATTR_REVERSE = 1,
  69. ATTR_UNDERLINE = 2,
  70. ATTR_BOLD = 4,
  71. ATTR_GFX = 8,
  72. };
  73. enum cursor_movement {
  74. CURSOR_UP,
  75. CURSOR_DOWN,
  76. CURSOR_LEFT,
  77. CURSOR_RIGHT,
  78. CURSOR_SAVE,
  79. CURSOR_LOAD
  80. };
  81. enum cursor_state {
  82. CURSOR_DEFAULT = 0,
  83. CURSOR_HIDE = 1,
  84. CURSOR_WRAPNEXT = 2
  85. };
  86. enum glyph_state {
  87. GLYPH_SET = 1,
  88. GLYPH_DIRTY = 2
  89. };
  90. enum term_mode {
  91. MODE_WRAP = 1,
  92. MODE_INSERT = 2,
  93. MODE_APPKEYPAD = 4,
  94. MODE_ALTSCREEN = 8,
  95. MODE_CRLF = 16,
  96. MODE_MOUSEBTN = 32,
  97. MODE_MOUSEMOTION = 64,
  98. MODE_MOUSE = 32|64,
  99. MODE_REVERSE = 128
  100. };
  101. enum escape_state {
  102. ESC_START = 1,
  103. ESC_CSI = 2,
  104. ESC_STR = 4, /* DSC, OSC, PM, APC */
  105. ESC_ALTCHARSET = 8,
  106. ESC_STR_END = 16, /* a final string was encountered */
  107. };
  108. enum window_state {
  109. WIN_VISIBLE = 1,
  110. WIN_REDRAW = 2,
  111. WIN_FOCUSED = 4
  112. };
  113. /* bit macro */
  114. #undef B0
  115. enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
  116. typedef unsigned char uchar;
  117. typedef unsigned int uint;
  118. typedef unsigned long ulong;
  119. typedef unsigned short ushort;
  120. typedef struct {
  121. char c[UTF_SIZ]; /* character code */
  122. uchar mode; /* attribute flags */
  123. ushort fg; /* foreground */
  124. ushort bg; /* background */
  125. uchar state; /* state flags */
  126. } Glyph;
  127. typedef Glyph* Line;
  128. typedef struct {
  129. Glyph attr; /* current char attributes */
  130. int x;
  131. int y;
  132. char state;
  133. } TCursor;
  134. /* CSI Escape sequence structs */
  135. /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  136. typedef struct {
  137. char buf[ESC_BUF_SIZ]; /* raw string */
  138. int len; /* raw string length */
  139. char priv;
  140. int arg[ESC_ARG_SIZ];
  141. int narg; /* nb of args */
  142. char mode;
  143. } CSIEscape;
  144. /* STR Escape sequence structs */
  145. /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
  146. typedef struct {
  147. char type; /* ESC type ... */
  148. char buf[STR_BUF_SIZ]; /* raw string */
  149. int len; /* raw string length */
  150. char *args[STR_ARG_SIZ];
  151. int narg; /* nb of args */
  152. } STREscape;
  153. /* Internal representation of the screen */
  154. typedef struct {
  155. int row; /* nb row */
  156. int col; /* nb col */
  157. Line* line; /* screen */
  158. Line* alt; /* alternate screen */
  159. bool* dirty; /* dirtyness of lines */
  160. TCursor c; /* cursor */
  161. int top; /* top scroll limit */
  162. int bot; /* bottom scroll limit */
  163. int mode; /* terminal mode flags */
  164. int esc; /* escape state flags */
  165. bool *tabs;
  166. } Term;
  167. /* Purely graphic info */
  168. typedef struct {
  169. Display* dpy;
  170. Colormap cmap;
  171. Window win;
  172. XdbeBackBuffer buf;
  173. Atom xembed;
  174. XIM xim;
  175. XIC xic;
  176. int scr;
  177. Bool isfixed; /* is fixed geometry? */
  178. int fx, fy, fw, fh; /* fixed geometry */
  179. int w; /* window width */
  180. int h; /* window height */
  181. int ch; /* char height */
  182. int cw; /* char width */
  183. char state; /* focus, redraw, visible */
  184. struct timeval lastdraw;
  185. } XWindow;
  186. typedef struct {
  187. KeySym k;
  188. uint mask;
  189. char s[ESC_BUF_SIZ];
  190. } Key;
  191. /* TODO: use better name for vars... */
  192. typedef struct {
  193. int mode;
  194. int bx, by;
  195. int ex, ey;
  196. struct {int x, y;} b, e;
  197. char *clip;
  198. Atom xtarget;
  199. struct timeval tclick1;
  200. struct timeval tclick2;
  201. } Selection;
  202. #include "config.h"
  203. /* Drawing Context */
  204. typedef struct {
  205. ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
  206. GC gc;
  207. struct {
  208. int ascent;
  209. int descent;
  210. short lbearing;
  211. short rbearing;
  212. XFontSet set;
  213. } font, bfont;
  214. } DC;
  215. static void die(const char*, ...);
  216. static void draw(void);
  217. static void redraw(void);
  218. static void drawregion(int, int, int, int);
  219. static void execsh(void);
  220. static void sigchld(int);
  221. static void run(void);
  222. static bool last_draw_too_old(void);
  223. static void csidump(void);
  224. static void csihandle(void);
  225. static void csiparse(void);
  226. static void csireset(void);
  227. static void strdump(void);
  228. static void strhandle(void);
  229. static void strparse(void);
  230. static void strreset(void);
  231. static void tclearregion(int, int, int, int);
  232. static void tcursor(int);
  233. static void tdeletechar(int);
  234. static void tdeleteline(int);
  235. static void tinsertblank(int);
  236. static void tinsertblankline(int);
  237. static void tmoveto(int, int);
  238. static void tnew(int, int);
  239. static void tnewline(int);
  240. static void tputtab(bool);
  241. static void tputc(char*);
  242. static void treset(void);
  243. static int tresize(int, int);
  244. static void tscrollup(int, int);
  245. static void tscrolldown(int, int);
  246. static void tsetattr(int*, int);
  247. static void tsetchar(char*);
  248. static void tsetscroll(int, int);
  249. static void tswapscreen(void);
  250. static void tsetdirt(int, int);
  251. static void tsetmode(bool, bool, int *, int);
  252. static void tfulldirt(void);
  253. static void ttynew(void);
  254. static void ttyread(void);
  255. static void ttyresize(int, int);
  256. static void ttywrite(const char *, size_t);
  257. static void xdraws(char *, Glyph, int, int, int, int);
  258. static void xhints(void);
  259. static void xclear(int, int, int, int);
  260. static void xcopy();
  261. static void xdrawcursor(void);
  262. static void xinit(void);
  263. static void xloadcols(void);
  264. static void xseturgency(int);
  265. static void xsetsel(char*);
  266. static void xresize(int, int);
  267. static void expose(XEvent *);
  268. static void visibility(XEvent *);
  269. static void unmap(XEvent *);
  270. static char* kmap(KeySym, uint);
  271. static void kpress(XEvent *);
  272. static void cmessage(XEvent *);
  273. static void resize(XEvent *);
  274. static void focus(XEvent *);
  275. static void brelease(XEvent *);
  276. static void bpress(XEvent *);
  277. static void bmotion(XEvent *);
  278. static void selnotify(XEvent *);
  279. static void selrequest(XEvent *);
  280. static void selinit(void);
  281. static inline bool selected(int, int);
  282. static void selcopy(void);
  283. static void selpaste();
  284. static void selscroll(int, int);
  285. static int utf8decode(char *, long *);
  286. static int utf8encode(long *, char *);
  287. static int utf8size(char *);
  288. static int isfullutf8(char *, int);
  289. static void (*handler[LASTEvent])(XEvent *) = {
  290. [KeyPress] = kpress,
  291. [ClientMessage] = cmessage,
  292. [ConfigureNotify] = resize,
  293. [VisibilityNotify] = visibility,
  294. [UnmapNotify] = unmap,
  295. [Expose] = expose,
  296. [FocusIn] = focus,
  297. [FocusOut] = focus,
  298. [MotionNotify] = bmotion,
  299. [ButtonPress] = bpress,
  300. [ButtonRelease] = brelease,
  301. [SelectionNotify] = selnotify,
  302. [SelectionRequest] = selrequest,
  303. };
  304. /* Globals */
  305. static DC dc;
  306. static XWindow xw;
  307. static Term term;
  308. static CSIEscape csiescseq;
  309. static STREscape strescseq;
  310. static int cmdfd;
  311. static pid_t pid;
  312. static Selection sel;
  313. static FILE *fileio;
  314. static char **opt_cmd = NULL;
  315. static char *opt_io = NULL;
  316. static char *opt_title = NULL;
  317. static char *opt_embed = NULL;
  318. static char *opt_class = NULL;
  319. int
  320. utf8decode(char *s, long *u) {
  321. uchar c;
  322. int i, n, rtn;
  323. rtn = 1;
  324. c = *s;
  325. if(~c & B7) { /* 0xxxxxxx */
  326. *u = c;
  327. return rtn;
  328. } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
  329. *u = c&(B4|B3|B2|B1|B0);
  330. n = 1;
  331. } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
  332. *u = c&(B3|B2|B1|B0);
  333. n = 2;
  334. } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
  335. *u = c & (B2|B1|B0);
  336. n = 3;
  337. } else
  338. goto invalid;
  339. for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
  340. c = *s;
  341. if((c & (B7|B6)) != B7) /* 10xxxxxx */
  342. goto invalid;
  343. *u <<= 6;
  344. *u |= c & (B5|B4|B3|B2|B1|B0);
  345. }
  346. if((n == 1 && *u < 0x80) ||
  347. (n == 2 && *u < 0x800) ||
  348. (n == 3 && *u < 0x10000) ||
  349. (*u >= 0xD800 && *u <= 0xDFFF))
  350. goto invalid;
  351. return rtn;
  352. invalid:
  353. *u = 0xFFFD;
  354. return rtn;
  355. }
  356. int
  357. utf8encode(long *u, char *s) {
  358. uchar *sp;
  359. ulong uc;
  360. int i, n;
  361. sp = (uchar*) s;
  362. uc = *u;
  363. if(uc < 0x80) {
  364. *sp = uc; /* 0xxxxxxx */
  365. return 1;
  366. } else if(*u < 0x800) {
  367. *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
  368. n = 1;
  369. } else if(uc < 0x10000) {
  370. *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
  371. n = 2;
  372. } else if(uc <= 0x10FFFF) {
  373. *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
  374. n = 3;
  375. } else {
  376. goto invalid;
  377. }
  378. for(i=n,++sp; i>0; --i,++sp)
  379. *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
  380. return n+1;
  381. invalid:
  382. /* U+FFFD */
  383. *s++ = '\xEF';
  384. *s++ = '\xBF';
  385. *s = '\xBD';
  386. return 3;
  387. }
  388. /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
  389. UTF-8 otherwise return 0 */
  390. int
  391. isfullutf8(char *s, int b) {
  392. uchar *c1, *c2, *c3;
  393. c1 = (uchar *) s;
  394. c2 = (uchar *) ++s;
  395. c3 = (uchar *) ++s;
  396. if(b < 1)
  397. return 0;
  398. else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
  399. return 0;
  400. else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
  401. ((b == 1) ||
  402. ((b == 2) && (*c2&(B7|B6)) == B7)))
  403. return 0;
  404. else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
  405. ((b == 1) ||
  406. ((b == 2) && (*c2&(B7|B6)) == B7) ||
  407. ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
  408. return 0;
  409. else
  410. return 1;
  411. }
  412. int
  413. utf8size(char *s) {
  414. uchar c = *s;
  415. if(~c&B7)
  416. return 1;
  417. else if((c&(B7|B6|B5)) == (B7|B6))
  418. return 2;
  419. else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
  420. return 3;
  421. else
  422. return 4;
  423. }
  424. void
  425. selinit(void) {
  426. memset(&sel.tclick1, 0, sizeof(sel.tclick1));
  427. memset(&sel.tclick2, 0, sizeof(sel.tclick2));
  428. sel.mode = 0;
  429. sel.bx = -1;
  430. sel.clip = NULL;
  431. sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
  432. if(sel.xtarget == None)
  433. sel.xtarget = XA_STRING;
  434. }
  435. static inline bool
  436. selected(int x, int y) {
  437. if(sel.ey == y && sel.by == y) {
  438. int bx = MIN(sel.bx, sel.ex);
  439. int ex = MAX(sel.bx, sel.ex);
  440. return BETWEEN(x, bx, ex);
  441. }
  442. return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
  443. || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
  444. }
  445. void
  446. getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
  447. if(b)
  448. *b = e->xbutton.button;
  449. *x = X2COL(e->xbutton.x);
  450. *y = Y2ROW(e->xbutton.y);
  451. sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
  452. sel.b.y = MIN(sel.by, sel.ey);
  453. sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
  454. sel.e.y = MAX(sel.by, sel.ey);
  455. }
  456. void
  457. mousereport(XEvent *e) {
  458. int x = X2COL(e->xbutton.x);
  459. int y = Y2ROW(e->xbutton.y);
  460. int button = e->xbutton.button;
  461. int state = e->xbutton.state;
  462. char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
  463. static int ob, ox, oy;
  464. /* from urxvt */
  465. if(e->xbutton.type == MotionNotify) {
  466. if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
  467. return;
  468. button = ob + 32;
  469. ox = x, oy = y;
  470. } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
  471. button = 3;
  472. } else {
  473. button -= Button1;
  474. if(button >= 3)
  475. button += 64 - 3;
  476. if(e->xbutton.type == ButtonPress) {
  477. ob = button;
  478. ox = x, oy = y;
  479. }
  480. }
  481. buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
  482. + (state & Mod4Mask ? 8 : 0)
  483. + (state & ControlMask ? 16 : 0);
  484. ttywrite(buf, sizeof(buf));
  485. }
  486. void
  487. bpress(XEvent *e) {
  488. if(IS_SET(MODE_MOUSE))
  489. mousereport(e);
  490. else if(e->xbutton.button == Button1) {
  491. if(sel.bx != -1)
  492. tsetdirt(sel.b.y, sel.e.y);
  493. sel.mode = 1;
  494. sel.ex = sel.bx = X2COL(e->xbutton.x);
  495. sel.ey = sel.by = Y2ROW(e->xbutton.y);
  496. }
  497. }
  498. void
  499. selcopy(void) {
  500. char *str, *ptr;
  501. int x, y, bufsize, is_selected = 0;
  502. if(sel.bx == -1)
  503. str = NULL;
  504. else {
  505. bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
  506. ptr = str = malloc(bufsize);
  507. /* append every set & selected glyph to the selection */
  508. for(y = 0; y < term.row; y++) {
  509. for(x = 0; x < term.col; x++) {
  510. is_selected = selected(x, y);
  511. if((term.line[y][x].state & GLYPH_SET) && is_selected) {
  512. int size = utf8size(term.line[y][x].c);
  513. memcpy(ptr, term.line[y][x].c, size);
  514. ptr += size;
  515. }
  516. }
  517. /* \n at the end of every selected line except for the last one */
  518. if(is_selected && y < sel.e.y)
  519. *ptr++ = '\n';
  520. }
  521. *ptr = 0;
  522. }
  523. xsetsel(str);
  524. }
  525. void
  526. selnotify(XEvent *e) {
  527. ulong nitems, ofs, rem;
  528. int format;
  529. uchar *data;
  530. Atom type;
  531. ofs = 0;
  532. do {
  533. if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
  534. False, AnyPropertyType, &type, &format,
  535. &nitems, &rem, &data)) {
  536. fprintf(stderr, "Clipboard allocation failed\n");
  537. return;
  538. }
  539. ttywrite((const char *) data, nitems * format / 8);
  540. XFree(data);
  541. /* number of 32-bit chunks returned */
  542. ofs += nitems * format / 32;
  543. } while(rem > 0);
  544. }
  545. void
  546. selpaste() {
  547. XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
  548. }
  549. void
  550. selrequest(XEvent *e) {
  551. XSelectionRequestEvent *xsre;
  552. XSelectionEvent xev;
  553. Atom xa_targets;
  554. xsre = (XSelectionRequestEvent *) e;
  555. xev.type = SelectionNotify;
  556. xev.requestor = xsre->requestor;
  557. xev.selection = xsre->selection;
  558. xev.target = xsre->target;
  559. xev.time = xsre->time;
  560. /* reject */
  561. xev.property = None;
  562. xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
  563. if(xsre->target == xa_targets) {
  564. /* respond with the supported type */
  565. Atom string = sel.xtarget;
  566. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  567. XA_ATOM, 32, PropModeReplace,
  568. (uchar *) &string, 1);
  569. xev.property = xsre->property;
  570. } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
  571. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  572. xsre->target, 8, PropModeReplace,
  573. (uchar *) sel.clip, strlen(sel.clip));
  574. xev.property = xsre->property;
  575. }
  576. /* all done, send a notification to the listener */
  577. if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
  578. fprintf(stderr, "Error sending SelectionNotify event\n");
  579. }
  580. void
  581. xsetsel(char *str) {
  582. /* register the selection for both the clipboard and the primary */
  583. Atom clipboard;
  584. free(sel.clip);
  585. sel.clip = str;
  586. XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
  587. clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
  588. XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
  589. XFlush(xw.dpy);
  590. }
  591. void
  592. brelease(XEvent *e) {
  593. if(IS_SET(MODE_MOUSE)) {
  594. mousereport(e);
  595. return;
  596. }
  597. if(e->xbutton.button == Button2)
  598. selpaste();
  599. else if(e->xbutton.button == Button1) {
  600. sel.mode = 0;
  601. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  602. term.dirty[sel.ey] = 1;
  603. if(sel.bx == sel.ex && sel.by == sel.ey) {
  604. struct timeval now;
  605. sel.bx = -1;
  606. gettimeofday(&now, NULL);
  607. if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
  608. /* triple click on the line */
  609. sel.b.x = sel.bx = 0;
  610. sel.e.x = sel.ex = term.col;
  611. sel.b.y = sel.e.y = sel.ey;
  612. selcopy();
  613. } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
  614. /* double click to select word */
  615. sel.bx = sel.ex;
  616. while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
  617. term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
  618. sel.b.x = sel.bx;
  619. while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
  620. term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
  621. sel.e.x = sel.ex;
  622. sel.b.y = sel.e.y = sel.ey;
  623. selcopy();
  624. }
  625. } else
  626. selcopy();
  627. }
  628. memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
  629. gettimeofday(&sel.tclick1, NULL);
  630. draw();
  631. }
  632. void
  633. bmotion(XEvent *e) {
  634. if(IS_SET(MODE_MOUSE)) {
  635. mousereport(e);
  636. return;
  637. }
  638. if(sel.mode) {
  639. int oldey = sel.ey, oldex = sel.ex;
  640. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  641. if(oldey != sel.ey || oldex != sel.ex) {
  642. int starty = MIN(oldey, sel.ey);
  643. int endy = MAX(oldey, sel.ey);
  644. tsetdirt(starty, endy);
  645. draw();
  646. }
  647. }
  648. }
  649. void
  650. die(const char *errstr, ...) {
  651. va_list ap;
  652. va_start(ap, errstr);
  653. vfprintf(stderr, errstr, ap);
  654. va_end(ap);
  655. exit(EXIT_FAILURE);
  656. }
  657. void
  658. execsh(void) {
  659. char **args;
  660. char *envshell = getenv("SHELL");
  661. DEFAULT(envshell, SHELL);
  662. putenv("TERM="TNAME);
  663. args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
  664. execvp(args[0], args);
  665. exit(EXIT_FAILURE);
  666. }
  667. void
  668. sigchld(int a) {
  669. int stat = 0;
  670. if(waitpid(pid, &stat, 0) < 0)
  671. die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
  672. if(WIFEXITED(stat))
  673. exit(WEXITSTATUS(stat));
  674. else
  675. exit(EXIT_FAILURE);
  676. }
  677. void
  678. ttynew(void) {
  679. int m, s;
  680. /* seems to work fine on linux, openbsd and freebsd */
  681. struct winsize w = {term.row, term.col, 0, 0};
  682. if(openpty(&m, &s, NULL, NULL, &w) < 0)
  683. die("openpty failed: %s\n", SERRNO);
  684. switch(pid = fork()) {
  685. case -1:
  686. die("fork failed\n");
  687. break;
  688. case 0:
  689. setsid(); /* create a new process group */
  690. dup2(s, STDIN_FILENO);
  691. dup2(s, STDOUT_FILENO);
  692. dup2(s, STDERR_FILENO);
  693. if(ioctl(s, TIOCSCTTY, NULL) < 0)
  694. die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
  695. close(s);
  696. close(m);
  697. execsh();
  698. break;
  699. default:
  700. close(s);
  701. cmdfd = m;
  702. signal(SIGCHLD, sigchld);
  703. if (opt_io && !(fileio = fopen(opt_io, "w"))) {
  704. fprintf(stderr, "Error opening %s:%s",
  705. opt_io, strerror(errno));
  706. }
  707. }
  708. }
  709. void
  710. dump(char c) {
  711. static int col;
  712. fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
  713. if(++col % 10 == 0)
  714. fprintf(stderr, "\n");
  715. }
  716. void
  717. ttyread(void) {
  718. static char buf[BUFSIZ];
  719. static int buflen = 0;
  720. char *ptr;
  721. char s[UTF_SIZ];
  722. int charsize; /* size of utf8 char in bytes */
  723. long utf8c;
  724. int ret;
  725. /* append read bytes to unprocessed bytes */
  726. if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
  727. die("Couldn't read from shell: %s\n", SERRNO);
  728. /* process every complete utf8 char */
  729. buflen += ret;
  730. ptr = buf;
  731. while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
  732. charsize = utf8decode(ptr, &utf8c);
  733. utf8encode(&utf8c, s);
  734. tputc(s);
  735. ptr += charsize;
  736. buflen -= charsize;
  737. }
  738. /* keep any uncomplete utf8 char for the next call */
  739. memmove(buf, ptr, buflen);
  740. }
  741. void
  742. ttywrite(const char *s, size_t n) {
  743. if(write(cmdfd, s, n) == -1)
  744. die("write error on tty: %s\n", SERRNO);
  745. }
  746. void
  747. ttyresize(int x, int y) {
  748. struct winsize w;
  749. w.ws_row = term.row;
  750. w.ws_col = term.col;
  751. w.ws_xpixel = w.ws_ypixel = 0;
  752. if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
  753. fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
  754. }
  755. void
  756. tsetdirt(int top, int bot)
  757. {
  758. int i;
  759. LIMIT(top, 0, term.row-1);
  760. LIMIT(bot, 0, term.row-1);
  761. for(i = top; i <= bot; i++)
  762. term.dirty[i] = 1;
  763. }
  764. void
  765. tfulldirt(void)
  766. {
  767. tsetdirt(0, term.row-1);
  768. }
  769. void
  770. tcursor(int mode) {
  771. static TCursor c;
  772. if(mode == CURSOR_SAVE)
  773. c = term.c;
  774. else if(mode == CURSOR_LOAD)
  775. term.c = c, tmoveto(c.x, c.y);
  776. }
  777. void
  778. treset(void) {
  779. unsigned i;
  780. term.c = (TCursor){{
  781. .mode = ATTR_NULL,
  782. .fg = DefaultFG,
  783. .bg = DefaultBG
  784. }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
  785. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  786. for (i = TAB; i < term.col; i += TAB)
  787. term.tabs[i] = 1;
  788. term.top = 0, term.bot = term.row - 1;
  789. term.mode = MODE_WRAP;
  790. tclearregion(0, 0, term.col-1, term.row-1);
  791. }
  792. void
  793. tnew(int col, int row) {
  794. /* set screen size */
  795. term.row = row, term.col = col;
  796. term.line = malloc(term.row * sizeof(Line));
  797. term.alt = malloc(term.row * sizeof(Line));
  798. term.dirty = malloc(term.row * sizeof(*term.dirty));
  799. term.tabs = malloc(term.col * sizeof(*term.tabs));
  800. for(row = 0; row < term.row; row++) {
  801. term.line[row] = malloc(term.col * sizeof(Glyph));
  802. term.alt [row] = malloc(term.col * sizeof(Glyph));
  803. term.dirty[row] = 0;
  804. }
  805. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  806. /* setup screen */
  807. treset();
  808. }
  809. void
  810. tswapscreen(void) {
  811. Line* tmp = term.line;
  812. term.line = term.alt;
  813. term.alt = tmp;
  814. term.mode ^= MODE_ALTSCREEN;
  815. tfulldirt();
  816. }
  817. void
  818. tscrolldown(int orig, int n) {
  819. int i;
  820. Line temp;
  821. LIMIT(n, 0, term.bot-orig+1);
  822. tclearregion(0, term.bot-n+1, term.col-1, term.bot);
  823. for(i = term.bot; i >= orig+n; i--) {
  824. temp = term.line[i];
  825. term.line[i] = term.line[i-n];
  826. term.line[i-n] = temp;
  827. term.dirty[i] = 1;
  828. term.dirty[i-n] = 1;
  829. }
  830. selscroll(orig, n);
  831. }
  832. void
  833. tscrollup(int orig, int n) {
  834. int i;
  835. Line temp;
  836. LIMIT(n, 0, term.bot-orig+1);
  837. tclearregion(0, orig, term.col-1, orig+n-1);
  838. for(i = orig; i <= term.bot-n; i++) {
  839. temp = term.line[i];
  840. term.line[i] = term.line[i+n];
  841. term.line[i+n] = temp;
  842. term.dirty[i] = 1;
  843. term.dirty[i+n] = 1;
  844. }
  845. selscroll(orig, -n);
  846. }
  847. void
  848. selscroll(int orig, int n) {
  849. if(sel.bx == -1)
  850. return;
  851. if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
  852. if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
  853. sel.bx = -1;
  854. return;
  855. }
  856. if(sel.by < term.top) {
  857. sel.by = term.top;
  858. sel.bx = 0;
  859. }
  860. if(sel.ey > term.bot) {
  861. sel.ey = term.bot;
  862. sel.ex = term.col;
  863. }
  864. sel.b.y = sel.by, sel.b.x = sel.bx;
  865. sel.e.y = sel.ey, sel.e.x = sel.ex;
  866. }
  867. }
  868. void
  869. tnewline(int first_col) {
  870. int y = term.c.y;
  871. if(y == term.bot)
  872. tscrollup(term.top, 1);
  873. else
  874. y++;
  875. tmoveto(first_col ? 0 : term.c.x, y);
  876. }
  877. void
  878. csiparse(void) {
  879. /* int noarg = 1; */
  880. char *p = csiescseq.buf;
  881. csiescseq.narg = 0;
  882. if(*p == '?')
  883. csiescseq.priv = 1, p++;
  884. while(p < csiescseq.buf+csiescseq.len) {
  885. while(isdigit(*p)) {
  886. csiescseq.arg[csiescseq.narg] *= 10;
  887. csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
  888. }
  889. if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
  890. csiescseq.narg++, p++;
  891. else {
  892. csiescseq.mode = *p;
  893. csiescseq.narg++;
  894. return;
  895. }
  896. }
  897. }
  898. void
  899. tmoveto(int x, int y) {
  900. LIMIT(x, 0, term.col-1);
  901. LIMIT(y, 0, term.row-1);
  902. term.c.state &= ~CURSOR_WRAPNEXT;
  903. term.c.x = x;
  904. term.c.y = y;
  905. }
  906. void
  907. tsetchar(char *c) {
  908. term.dirty[term.c.y] = 1;
  909. term.line[term.c.y][term.c.x] = term.c.attr;
  910. memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
  911. term.line[term.c.y][term.c.x].state |= GLYPH_SET;
  912. }
  913. void
  914. tclearregion(int x1, int y1, int x2, int y2) {
  915. int x, y, temp;
  916. if(x1 > x2)
  917. temp = x1, x1 = x2, x2 = temp;
  918. if(y1 > y2)
  919. temp = y1, y1 = y2, y2 = temp;
  920. LIMIT(x1, 0, term.col-1);
  921. LIMIT(x2, 0, term.col-1);
  922. LIMIT(y1, 0, term.row-1);
  923. LIMIT(y2, 0, term.row-1);
  924. for(y = y1; y <= y2; y++) {
  925. term.dirty[y] = 1;
  926. for(x = x1; x <= x2; x++)
  927. term.line[y][x].state = 0;
  928. }
  929. }
  930. void
  931. tdeletechar(int n) {
  932. int src = term.c.x + n;
  933. int dst = term.c.x;
  934. int size = term.col - src;
  935. term.dirty[term.c.y] = 1;
  936. if(src >= term.col) {
  937. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  938. return;
  939. }
  940. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  941. tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
  942. }
  943. void
  944. tinsertblank(int n) {
  945. int src = term.c.x;
  946. int dst = src + n;
  947. int size = term.col - dst;
  948. term.dirty[term.c.y] = 1;
  949. if(dst >= term.col) {
  950. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  951. return;
  952. }
  953. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  954. tclearregion(src, term.c.y, dst - 1, term.c.y);
  955. }
  956. void
  957. tinsertblankline(int n) {
  958. if(term.c.y < term.top || term.c.y > term.bot)
  959. return;
  960. tscrolldown(term.c.y, n);
  961. }
  962. void
  963. tdeleteline(int n) {
  964. if(term.c.y < term.top || term.c.y > term.bot)
  965. return;
  966. tscrollup(term.c.y, n);
  967. }
  968. void
  969. tsetattr(int *attr, int l) {
  970. int i;
  971. for(i = 0; i < l; i++) {
  972. switch(attr[i]) {
  973. case 0:
  974. term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
  975. term.c.attr.fg = DefaultFG;
  976. term.c.attr.bg = DefaultBG;
  977. break;
  978. case 1:
  979. term.c.attr.mode |= ATTR_BOLD;
  980. break;
  981. case 3: /* enter standout (highlight) mode TODO: make it italic */
  982. term.c.attr.mode |= ATTR_REVERSE;
  983. break;
  984. case 4:
  985. term.c.attr.mode |= ATTR_UNDERLINE;
  986. break;
  987. case 7:
  988. term.c.attr.mode |= ATTR_REVERSE;
  989. break;
  990. case 22:
  991. term.c.attr.mode &= ~ATTR_BOLD;
  992. break;
  993. case 23: /* leave standout (highlight) mode TODO: make it italic */
  994. term.c.attr.mode &= ~ATTR_REVERSE;
  995. break;
  996. case 24:
  997. term.c.attr.mode &= ~ATTR_UNDERLINE;
  998. break;
  999. case 27:
  1000. term.c.attr.mode &= ~ATTR_REVERSE;
  1001. break;
  1002. case 38:
  1003. if(i + 2 < l && attr[i + 1] == 5) {
  1004. i += 2;
  1005. if(BETWEEN(attr[i], 0, 255))
  1006. term.c.attr.fg = attr[i];
  1007. else
  1008. fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
  1009. }
  1010. else
  1011. fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
  1012. break;
  1013. case 39:
  1014. term.c.attr.fg = DefaultFG;
  1015. break;
  1016. case 48:
  1017. if(i + 2 < l && attr[i + 1] == 5) {
  1018. i += 2;
  1019. if(BETWEEN(attr[i], 0, 255))
  1020. term.c.attr.bg = attr[i];
  1021. else
  1022. fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
  1023. }
  1024. else
  1025. fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
  1026. break;
  1027. case 49:
  1028. term.c.attr.bg = DefaultBG;
  1029. break;
  1030. default:
  1031. if(BETWEEN(attr[i], 30, 37))
  1032. term.c.attr.fg = attr[i] - 30;
  1033. else if(BETWEEN(attr[i], 40, 47))
  1034. term.c.attr.bg = attr[i] - 40;
  1035. else if(BETWEEN(attr[i], 90, 97))
  1036. term.c.attr.fg = attr[i] - 90 + 8;
  1037. else if(BETWEEN(attr[i], 100, 107))
  1038. term.c.attr.fg = attr[i] - 100 + 8;
  1039. else
  1040. fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
  1041. break;
  1042. }
  1043. }
  1044. }
  1045. void
  1046. tsetscroll(int t, int b) {
  1047. int temp;
  1048. LIMIT(t, 0, term.row-1);
  1049. LIMIT(b, 0, term.row-1);
  1050. if(t > b) {
  1051. temp = t;
  1052. t = b;
  1053. b = temp;
  1054. }
  1055. term.top = t;
  1056. term.bot = b;
  1057. }
  1058. #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
  1059. void
  1060. tsetmode(bool priv, bool set, int *args, int narg) {
  1061. int *lim, mode;
  1062. for (lim = args + narg; args < lim; ++args) {
  1063. if(priv) {
  1064. switch(*args) {
  1065. case 1:
  1066. MODBIT(term.mode, set, MODE_APPKEYPAD);
  1067. break;
  1068. case 5: /* DECSCNM -- Reverve video */
  1069. mode = term.mode;
  1070. MODBIT(term.mode,set, MODE_REVERSE);
  1071. if (mode != term.mode)
  1072. redraw();
  1073. break;
  1074. case 7:
  1075. MODBIT(term.mode, set, MODE_WRAP);
  1076. break;
  1077. case 20:
  1078. MODBIT(term.mode, set, MODE_CRLF);
  1079. break;
  1080. case 12: /* att610 -- Start blinking cursor (IGNORED) */
  1081. break;
  1082. case 25:
  1083. MODBIT(term.c.state, !set, CURSOR_HIDE);
  1084. break;
  1085. case 1000: /* 1000,1002: enable xterm mouse report */
  1086. MODBIT(term.mode, set, MODE_MOUSEBTN);
  1087. break;
  1088. case 1002:
  1089. MODBIT(term.mode, set, MODE_MOUSEMOTION);
  1090. break;
  1091. case 1049: /* = 1047 and 1048 */
  1092. case 47:
  1093. case 1047:
  1094. if(IS_SET(MODE_ALTSCREEN))
  1095. tclearregion(0, 0, term.col-1, term.row-1);
  1096. if ((set && !IS_SET(MODE_ALTSCREEN)) ||
  1097. (!set && IS_SET(MODE_ALTSCREEN))) {
  1098. tswapscreen();
  1099. }
  1100. if (*args != 1049)
  1101. break;
  1102. /* pass through */
  1103. case 1048:
  1104. tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
  1105. break;
  1106. default:
  1107. fprintf(stderr,
  1108. "erresc: unknown private set/reset mode %d\n",
  1109. *args);
  1110. break;
  1111. }
  1112. } else {
  1113. switch(*args) {
  1114. case 4:
  1115. MODBIT(term.mode, set, MODE_INSERT);
  1116. break;
  1117. default:
  1118. fprintf(stderr,
  1119. "erresc: unknown set/reset mode %d\n",
  1120. *args);
  1121. break;
  1122. }
  1123. }
  1124. }
  1125. }
  1126. #undef MODBIT
  1127. void
  1128. csihandle(void) {
  1129. switch(csiescseq.mode) {
  1130. default:
  1131. unknown:
  1132. fprintf(stderr, "erresc: unknown csi ");
  1133. csidump();
  1134. /* die(""); */
  1135. break;
  1136. case '@': /* ICH -- Insert <n> blank char */
  1137. DEFAULT(csiescseq.arg[0], 1);
  1138. tinsertblank(csiescseq.arg[0]);
  1139. break;
  1140. case 'A': /* CUU -- Cursor <n> Up */
  1141. case 'e':
  1142. DEFAULT(csiescseq.arg[0], 1);
  1143. tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
  1144. break;
  1145. case 'B': /* CUD -- Cursor <n> Down */
  1146. DEFAULT(csiescseq.arg[0], 1);
  1147. tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
  1148. break;
  1149. case 'C': /* CUF -- Cursor <n> Forward */
  1150. case 'a':
  1151. DEFAULT(csiescseq.arg[0], 1);
  1152. tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
  1153. break;
  1154. case 'D': /* CUB -- Cursor <n> Backward */
  1155. DEFAULT(csiescseq.arg[0], 1);
  1156. tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
  1157. break;
  1158. case 'E': /* CNL -- Cursor <n> Down and first col */
  1159. DEFAULT(csiescseq.arg[0], 1);
  1160. tmoveto(0, term.c.y+csiescseq.arg[0]);
  1161. break;
  1162. case 'F': /* CPL -- Cursor <n> Up and first col */
  1163. DEFAULT(csiescseq.arg[0], 1);
  1164. tmoveto(0, term.c.y-csiescseq.arg[0]);
  1165. break;
  1166. case 'g': /* TBC -- Tabulation clear */
  1167. switch (csiescseq.arg[0]) {
  1168. case 0: /* clear current tab stop */
  1169. term.tabs[term.c.x] = 0;
  1170. break;
  1171. case 3: /* clear all the tabs */
  1172. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  1173. break;
  1174. default:
  1175. goto unknown;
  1176. }
  1177. break;
  1178. case 'G': /* CHA -- Move to <col> */
  1179. case '`': /* XXX: HPA -- same? */
  1180. DEFAULT(csiescseq.arg[0], 1);
  1181. tmoveto(csiescseq.arg[0]-1, term.c.y);
  1182. break;
  1183. case 'H': /* CUP -- Move to <row> <col> */
  1184. case 'f': /* XXX: HVP -- same? */
  1185. DEFAULT(csiescseq.arg[0], 1);
  1186. DEFAULT(csiescseq.arg[1], 1);
  1187. tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
  1188. break;
  1189. case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
  1190. DEFAULT(csiescseq.arg[0], 1);
  1191. while (csiescseq.arg[0]--)
  1192. tputtab(1);
  1193. break;
  1194. case 'J': /* ED -- Clear screen */
  1195. sel.bx = -1;
  1196. switch(csiescseq.arg[0]) {
  1197. case 0: /* below */
  1198. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1199. if(term.c.y < term.row-1)
  1200. tclearregion(0, term.c.y+1, term.col-1, term.row-1);
  1201. break;
  1202. case 1: /* above */
  1203. if(term.c.y > 1)
  1204. tclearregion(0, 0, term.col-1, term.c.y-1);
  1205. tclearregion(0, term.c.y, term.c.x, term.c.y);
  1206. break;
  1207. case 2: /* all */
  1208. tclearregion(0, 0, term.col-1, term.row-1);
  1209. break;
  1210. default:
  1211. goto unknown;
  1212. }
  1213. break;
  1214. case 'K': /* EL -- Clear line */
  1215. switch(csiescseq.arg[0]) {
  1216. case 0: /* right */
  1217. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1218. break;
  1219. case 1: /* left */
  1220. tclearregion(0, term.c.y, term.c.x, term.c.y);
  1221. break;
  1222. case 2: /* all */
  1223. tclearregion(0, term.c.y, term.col-1, term.c.y);
  1224. break;
  1225. }
  1226. break;
  1227. case 'S': /* SU -- Scroll <n> line up */
  1228. DEFAULT(csiescseq.arg[0], 1);
  1229. tscrollup(term.top, csiescseq.arg[0]);
  1230. break;
  1231. case 'T': /* SD -- Scroll <n> line down */
  1232. DEFAULT(csiescseq.arg[0], 1);
  1233. tscrolldown(term.top, csiescseq.arg[0]);
  1234. break;
  1235. case 'L': /* IL -- Insert <n> blank lines */
  1236. DEFAULT(csiescseq.arg[0], 1);
  1237. tinsertblankline(csiescseq.arg[0]);
  1238. break;
  1239. case 'l': /* RM -- Reset Mode */
  1240. tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
  1241. break;
  1242. case 'M': /* DL -- Delete <n> lines */
  1243. DEFAULT(csiescseq.arg[0], 1);
  1244. tdeleteline(csiescseq.arg[0]);
  1245. break;
  1246. case 'X': /* ECH -- Erase <n> char */
  1247. DEFAULT(csiescseq.arg[0], 1);
  1248. tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
  1249. break;
  1250. case 'P': /* DCH -- Delete <n> char */
  1251. DEFAULT(csiescseq.arg[0], 1);
  1252. tdeletechar(csiescseq.arg[0]);
  1253. break;
  1254. case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
  1255. DEFAULT(csiescseq.arg[0], 1);
  1256. while (csiescseq.arg[0]--)
  1257. tputtab(0);
  1258. break;
  1259. case 'd': /* VPA -- Move to <row> */
  1260. DEFAULT(csiescseq.arg[0], 1);
  1261. tmoveto(term.c.x, csiescseq.arg[0]-1);
  1262. break;
  1263. case 'h': /* SM -- Set terminal mode */
  1264. tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
  1265. break;
  1266. case 'm': /* SGR -- Terminal attribute (color) */
  1267. tsetattr(csiescseq.arg, csiescseq.narg);
  1268. break;
  1269. case 'r': /* DECSTBM -- Set Scrolling Region */
  1270. if(csiescseq.priv)
  1271. goto unknown;
  1272. else {
  1273. DEFAULT(csiescseq.arg[0], 1);
  1274. DEFAULT(csiescseq.arg[1], term.row);
  1275. tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
  1276. tmoveto(0, 0);
  1277. }
  1278. break;
  1279. case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
  1280. tcursor(CURSOR_SAVE);
  1281. break;
  1282. case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
  1283. tcursor(CURSOR_LOAD);
  1284. break;
  1285. }
  1286. }
  1287. void
  1288. csidump(void) {
  1289. int i;
  1290. printf("ESC[");
  1291. for(i = 0; i < csiescseq.len; i++) {
  1292. uint c = csiescseq.buf[i] & 0xff;
  1293. if(isprint(c)) putchar(c);
  1294. else if(c == '\n') printf("(\\n)");
  1295. else if(c == '\r') printf("(\\r)");
  1296. else if(c == 0x1b) printf("(\\e)");
  1297. else printf("(%02x)", c);
  1298. }
  1299. putchar('\n');
  1300. }
  1301. void
  1302. csireset(void) {
  1303. memset(&csiescseq, 0, sizeof(csiescseq));
  1304. }
  1305. void
  1306. strhandle(void) {
  1307. char *p;
  1308. /*
  1309. * TODO: make this being useful in case of color palette change.
  1310. */
  1311. strparse();
  1312. p = strescseq.buf;
  1313. switch(strescseq.type) {
  1314. case ']': /* OSC -- Operating System Command */
  1315. switch(p[0]) {
  1316. case '0':
  1317. case '1':
  1318. case '2':
  1319. /*
  1320. * TODO: Handle special chars in string, like umlauts.
  1321. */
  1322. if(p[1] == ';') {
  1323. XStoreName(xw.dpy, xw.win, strescseq.buf+2);
  1324. }
  1325. break;
  1326. case ';':
  1327. XStoreName(xw.dpy, xw.win, strescseq.buf+1);
  1328. break;
  1329. case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
  1330. break;
  1331. default:
  1332. fprintf(stderr, "erresc: unknown str ");
  1333. strdump();
  1334. break;
  1335. }
  1336. break;
  1337. case 'P': /* DSC -- Device Control String */
  1338. case '_': /* APC -- Application Program Command */
  1339. case '^': /* PM -- Privacy Message */
  1340. default:
  1341. fprintf(stderr, "erresc: unknown str ");
  1342. strdump();
  1343. /* die(""); */
  1344. break;
  1345. }
  1346. }
  1347. void
  1348. strparse(void) {
  1349. /*
  1350. * TODO: Implement parsing like for CSI when required.
  1351. * Format: ESC type cmd ';' arg0 [';' argn] ESC \
  1352. */
  1353. return;
  1354. }
  1355. void
  1356. strdump(void) {
  1357. int i;
  1358. printf("ESC%c", strescseq.type);
  1359. for(i = 0; i < strescseq.len; i++) {
  1360. uint c = strescseq.buf[i] & 0xff;
  1361. if(isprint(c)) putchar(c);
  1362. else if(c == '\n') printf("(\\n)");
  1363. else if(c == '\r') printf("(\\r)");
  1364. else if(c == 0x1b) printf("(\\e)");
  1365. else printf("(%02x)", c);
  1366. }
  1367. printf("ESC\\\n");
  1368. }
  1369. void
  1370. strreset(void) {
  1371. memset(&strescseq, 0, sizeof(strescseq));
  1372. }
  1373. void
  1374. tputtab(bool forward) {
  1375. unsigned x = term.c.x;
  1376. if (forward) {
  1377. if (x == term.col)
  1378. return;
  1379. for (++x; x < term.col && !term.tabs[x]; ++x)
  1380. /* nothing */ ;
  1381. } else {
  1382. if (x == 0)
  1383. return;
  1384. for (--x; x > 0 && !term.tabs[x]; --x)
  1385. /* nothing */ ;
  1386. }
  1387. tmoveto(x, term.c.y);
  1388. }
  1389. void
  1390. tputc(char *c) {
  1391. char ascii = *c;
  1392. if (fileio)
  1393. putc(ascii, fileio);
  1394. if(term.esc & ESC_START) {
  1395. if(term.esc & ESC_CSI) {
  1396. csiescseq.buf[csiescseq.len++] = ascii;
  1397. if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
  1398. term.esc = 0;
  1399. csiparse(), csihandle();
  1400. }
  1401. } else if(term.esc & ESC_STR) {
  1402. switch(ascii) {
  1403. case '\033':
  1404. term.esc = ESC_START | ESC_STR_END;
  1405. break;
  1406. case '\a': /* backwards compatibility to xterm */
  1407. term.esc = 0;
  1408. strhandle();
  1409. break;
  1410. default:
  1411. strescseq.buf[strescseq.len++] = ascii;
  1412. if (strescseq.len+1 >= STR_BUF_SIZ) {
  1413. term.esc = 0;
  1414. strhandle();
  1415. }
  1416. }
  1417. } else if(term.esc & ESC_STR_END) {
  1418. term.esc = 0;
  1419. if(ascii == '\\')
  1420. strhandle();
  1421. } else if(term.esc & ESC_ALTCHARSET) {
  1422. switch(ascii) {
  1423. case '0': /* Line drawing crap */
  1424. term.c.attr.mode |= ATTR_GFX;
  1425. break;
  1426. case 'B': /* Back to regular text */
  1427. term.c.attr.mode &= ~ATTR_GFX;
  1428. break;
  1429. default:
  1430. fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
  1431. }
  1432. term.esc = 0;
  1433. } else {
  1434. switch(ascii) {
  1435. case '[':
  1436. term.esc |= ESC_CSI;
  1437. break;
  1438. case 'P': /* DCS -- Device Control String */
  1439. case '_': /* APC -- Application Program Command */
  1440. case '^': /* PM -- Privacy Message */
  1441. case ']': /* OSC -- Operating System Command */
  1442. strreset();
  1443. strescseq.type = ascii;
  1444. term.esc |= ESC_STR;
  1445. break;
  1446. case '(':
  1447. term.esc |= ESC_ALTCHARSET;
  1448. break;
  1449. case 'D': /* IND -- Linefeed */
  1450. if(term.c.y == term.bot)
  1451. tscrollup(term.top, 1);
  1452. else
  1453. tmoveto(term.c.x, term.c.y+1);
  1454. term.esc = 0;
  1455. break;
  1456. case 'E': /* NEL -- Next line */
  1457. tnewline(1); /* always go to first col */
  1458. term.esc = 0;
  1459. break;
  1460. case 'H': /* HTS -- Horizontal tab stop */
  1461. term.tabs[term.c.x] = 1;
  1462. term.esc = 0;
  1463. break;
  1464. case 'M': /* RI -- Reverse index */
  1465. if(term.c.y == term.top)
  1466. tscrolldown(term.top, 1);
  1467. else
  1468. tmoveto(term.c.x, term.c.y-1);
  1469. term.esc = 0;
  1470. break;
  1471. case 'c': /* RIS -- Reset to inital state */
  1472. treset();
  1473. term.esc = 0;
  1474. break;
  1475. case '=': /* DECPAM -- Application keypad */
  1476. term.mode |= MODE_APPKEYPAD;
  1477. term.esc = 0;
  1478. break;
  1479. case '>': /* DECPNM -- Normal keypad */
  1480. term.mode &= ~MODE_APPKEYPAD;
  1481. term.esc = 0;
  1482. break;
  1483. case '7': /* DECSC -- Save Cursor */
  1484. tcursor(CURSOR_SAVE);
  1485. term.esc = 0;
  1486. break;
  1487. case '8': /* DECRC -- Restore Cursor */
  1488. tcursor(CURSOR_LOAD);
  1489. term.esc = 0;
  1490. break;
  1491. case '\\': /* ST -- Stop */
  1492. term.esc = 0;
  1493. break;
  1494. default:
  1495. fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
  1496. (uchar) ascii, isprint(ascii)?ascii:'.');
  1497. term.esc = 0;
  1498. }
  1499. }
  1500. } else {
  1501. if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
  1502. sel.bx = -1;
  1503. switch(ascii) {
  1504. case '\t':
  1505. tputtab(1);
  1506. break;
  1507. case '\b':
  1508. tmoveto(term.c.x-1, term.c.y);
  1509. break;
  1510. case '\r':
  1511. tmoveto(0, term.c.y);
  1512. break;
  1513. case '\f':
  1514. case '\v':
  1515. case '\n':
  1516. /* go to first col if the mode is set */
  1517. tnewline(IS_SET(MODE_CRLF));
  1518. break;
  1519. case '\a':
  1520. if(!(xw.state & WIN_FOCUSED))
  1521. xseturgency(1);
  1522. break;
  1523. case '\033':
  1524. csireset();
  1525. term.esc = ESC_START;
  1526. break;
  1527. default:
  1528. if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
  1529. tnewline(1); /* always go to first col */
  1530. tsetchar(c);
  1531. if(term.c.x+1 < term.col)
  1532. tmoveto(term.c.x+1, term.c.y);
  1533. else
  1534. term.c.state |= CURSOR_WRAPNEXT;
  1535. }
  1536. }
  1537. }
  1538. int
  1539. tresize(int col, int row) {
  1540. int i, x;
  1541. int minrow = MIN(row, term.row);
  1542. int mincol = MIN(col, term.col);
  1543. int slide = term.c.y - row + 1;
  1544. if(col < 1 || row < 1)
  1545. return 0;
  1546. /* free unneeded rows */
  1547. i = 0;
  1548. if(slide > 0) {
  1549. /* slide screen to keep cursor where we expect it -
  1550. * tscrollup would work here, but we can optimize to
  1551. * memmove because we're freeing the earlier lines */
  1552. for(/* i = 0 */; i < slide; i++) {
  1553. free(term.line[i]);
  1554. free(term.alt[i]);
  1555. }
  1556. memmove(term.line, term.line + slide, row * sizeof(Line));
  1557. memmove(term.alt, term.alt + slide, row * sizeof(Line));
  1558. }
  1559. for(i += row; i < term.row; i++) {
  1560. free(term.line[i]);
  1561. free(term.alt[i]);
  1562. }
  1563. /* resize to new height */
  1564. term.line = realloc(term.line, row * sizeof(Line));
  1565. term.alt = realloc(term.alt, row * sizeof(Line));
  1566. term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
  1567. term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
  1568. /* resize each row to new width, zero-pad if needed */
  1569. for(i = 0; i < minrow; i++) {
  1570. term.dirty[i] = 1;
  1571. term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
  1572. term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
  1573. for(x = mincol; x < col; x++) {
  1574. term.line[i][x].state = 0;
  1575. term.alt[i][x].state = 0;
  1576. }
  1577. }
  1578. /* allocate any new rows */
  1579. for(/* i == minrow */; i < row; i++) {
  1580. term.dirty[i] = 1;
  1581. term.line[i] = calloc(col, sizeof(Glyph));
  1582. term.alt [i] = calloc(col, sizeof(Glyph));
  1583. }
  1584. if (col > term.col) {
  1585. bool *bp = term.tabs + term.col;
  1586. memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
  1587. while (--bp > term.tabs && !*bp)
  1588. /* nothing */ ;
  1589. for (bp += TAB; bp < term.tabs + col; bp += TAB)
  1590. *bp = 1;
  1591. }
  1592. /* update terminal size */
  1593. term.col = col, term.row = row;
  1594. /* make use of the LIMIT in tmoveto */
  1595. tmoveto(term.c.x, term.c.y);
  1596. /* reset scrolling region */
  1597. tsetscroll(0, row-1);
  1598. return (slide > 0);
  1599. }
  1600. void
  1601. xresize(int col, int row) {
  1602. xw.w = MAX(1, 2*BORDER + col * xw.cw);
  1603. xw.h = MAX(1, 2*BORDER + row * xw.ch);
  1604. }
  1605. void
  1606. xloadcols(void) {
  1607. int i, r, g, b;
  1608. XColor color;
  1609. ulong white = WhitePixel(xw.dpy, xw.scr);
  1610. /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
  1611. for(i = 0; i < LEN(colorname); i++) {
  1612. if(!colorname[i])
  1613. continue;
  1614. if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
  1615. dc.col[i] = white;
  1616. fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
  1617. } else
  1618. dc.col[i] = color.pixel;
  1619. }
  1620. /* load colors [16-255] ; same colors as xterm */
  1621. for(i = 16, r = 0; r < 6; r++)
  1622. for(g = 0; g < 6; g++)
  1623. for(b = 0; b < 6; b++) {
  1624. color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
  1625. color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
  1626. color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
  1627. if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1628. dc.col[i] = white;
  1629. fprintf(stderr, "Could not allocate color %d\n", i);
  1630. } else
  1631. dc.col[i] = color.pixel;
  1632. i++;
  1633. }
  1634. for(r = 0; r < 24; r++, i++) {
  1635. color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
  1636. if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
  1637. dc.col[i] = white;
  1638. fprintf(stderr, "Could not allocate color %d\n", i);
  1639. } else
  1640. dc.col[i] = color.pixel;
  1641. }
  1642. }
  1643. void
  1644. xclear(int x1, int y1, int x2, int y2) {
  1645. XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
  1646. XFillRectangle(xw.dpy, xw.buf, dc.gc,
  1647. BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
  1648. (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
  1649. }
  1650. void
  1651. xhints(void) {
  1652. XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
  1653. XWMHints wm = {.flags = InputHint, .input = 1};
  1654. XSizeHints *sizeh = NULL;
  1655. sizeh = XAllocSizeHints();
  1656. if(xw.isfixed == False) {
  1657. sizeh->flags = PSize | PResizeInc | PBaseSize;
  1658. sizeh->height = xw.h;
  1659. sizeh->width = xw.w;
  1660. sizeh->height_inc = xw.ch;
  1661. sizeh->width_inc = xw.cw;
  1662. sizeh->base_height = 2*BORDER;
  1663. sizeh->base_width = 2*BORDER;
  1664. } else {
  1665. sizeh->flags = PMaxSize | PMinSize;
  1666. sizeh->min_width = sizeh->max_width = xw.fw;
  1667. sizeh->min_height = sizeh->max_height = xw.fh;
  1668. }
  1669. XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
  1670. XFree(sizeh);
  1671. }
  1672. XFontSet
  1673. xinitfont(char *fontstr) {
  1674. XFontSet set;
  1675. char *def, **missing;
  1676. int n;
  1677. missing = NULL;
  1678. set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
  1679. if(missing) {
  1680. while(n--)
  1681. fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
  1682. XFreeStringList(missing);
  1683. }
  1684. return set;
  1685. }
  1686. void
  1687. xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
  1688. XFontStruct **xfonts;
  1689. char **font_names;
  1690. int i, n;
  1691. *ascent = *descent = *lbearing = *rbearing = 0;
  1692. n = XFontsOfFontSet(set, &xfonts, &font_names);
  1693. for(i = 0; i < n; i++) {
  1694. *ascent = MAX(*ascent, (*xfonts)->ascent);
  1695. *descent = MAX(*descent, (*xfonts)->descent);
  1696. *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
  1697. *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
  1698. xfonts++;
  1699. }
  1700. }
  1701. void
  1702. initfonts(char *fontstr, char *bfontstr) {
  1703. if((dc.font.set = xinitfont(fontstr)) == NULL ||
  1704. (dc.bfont.set = xinitfont(bfontstr)) == NULL)
  1705. die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
  1706. xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
  1707. &dc.font.lbearing, &dc.font.rbearing);
  1708. xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
  1709. &dc.bfont.lbearing, &dc.bfont.rbearing);
  1710. }
  1711. void
  1712. xinit(void) {
  1713. XSetWindowAttributes attrs;
  1714. Cursor cursor;
  1715. Window parent;
  1716. int sw, sh;
  1717. if(!(xw.dpy = XOpenDisplay(NULL)))
  1718. die("Can't open display\n");
  1719. xw.scr = XDefaultScreen(xw.dpy);
  1720. /* adjust fixed window geometry */
  1721. if(xw.isfixed) {
  1722. sw = DisplayWidth(xw.dpy, xw.scr);
  1723. sh = DisplayWidth(xw.dpy, xw.scr);
  1724. if(xw.fx < 0)
  1725. xw.fx = sw + xw.fx - xw.fw;
  1726. if(xw.fy < 0)
  1727. xw.fy = sh + xw.fy - xw.fh;
  1728. } else {
  1729. /* window - default size */
  1730. xw.h = 2*BORDER + term.row * xw.ch;
  1731. xw.w = 2*BORDER + term.col * xw.cw;
  1732. xw.fw = xw.w;
  1733. xw.fh = xw.h;
  1734. }
  1735. /* font */
  1736. initfonts(FONT, BOLDFONT);
  1737. /* XXX: Assuming same size for bold font */
  1738. xw.cw = dc.font.rbearing - dc.font.lbearing;
  1739. xw.ch = dc.font.ascent + dc.font.descent;
  1740. /* colors */
  1741. xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
  1742. xloadcols();
  1743. attrs.background_pixel = dc.col[DefaultBG];
  1744. attrs.border_pixel = dc.col[DefaultBG];
  1745. attrs.bit_gravity = NorthWestGravity;
  1746. attrs.event_mask = FocusChangeMask | KeyPressMask
  1747. | ExposureMask | VisibilityChangeMask | StructureNotifyMask
  1748. | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
  1749. | EnterWindowMask | LeaveWindowMask;
  1750. attrs.colormap = xw.cmap;
  1751. parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
  1752. xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
  1753. xw.fw, xw.fh, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
  1754. XDefaultVisual(xw.dpy, xw.scr),
  1755. CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
  1756. | CWColormap,
  1757. &attrs);
  1758. xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
  1759. /* input methods */
  1760. xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
  1761. xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
  1762. | XIMStatusNothing, XNClientWindow, xw.win,
  1763. XNFocusWindow, xw.win, NULL);
  1764. /* gc */
  1765. dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
  1766. /* white cursor, black outline */
  1767. cursor = XCreateFontCursor(xw.dpy, XC_xterm);
  1768. XDefineCursor(xw.dpy, xw.win, cursor);
  1769. XRecolorCursor(xw.dpy, cursor,
  1770. &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
  1771. &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
  1772. xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
  1773. XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
  1774. XMapWindow(xw.dpy, xw.win);
  1775. xhints();
  1776. XSync(xw.dpy, 0);
  1777. }
  1778. void
  1779. xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
  1780. int fg = base.fg, bg = base.bg, temp;
  1781. int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
  1782. XFontSet fontset = dc.font.set;
  1783. int i;
  1784. /* only switch default fg/bg if term is in RV mode */
  1785. if(IS_SET(MODE_REVERSE)) {
  1786. if(fg == DefaultFG)
  1787. fg = DefaultBG;
  1788. if(bg == DefaultBG)
  1789. bg = DefaultFG;
  1790. }
  1791. if(base.mode & ATTR_REVERSE)
  1792. temp = fg, fg = bg, bg = temp;
  1793. if(base.mode & ATTR_BOLD) {
  1794. fg += 8;
  1795. fontset = dc.bfont.set;
  1796. }
  1797. XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
  1798. XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
  1799. if(base.mode & ATTR_GFX) {
  1800. for(i = 0; i < bytelen; i++) {
  1801. char c = gfx[(uint)s[i] % 256];
  1802. if(c)
  1803. s[i] = c;
  1804. else if(s[i] > 0x5f)
  1805. s[i] -= 0x5f;
  1806. }
  1807. }
  1808. XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
  1809. if(base.mode & ATTR_UNDERLINE)
  1810. XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
  1811. }
  1812. /* copy buffer pixmap to screen pixmap */
  1813. void
  1814. xcopy() {
  1815. XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
  1816. XdbeSwapBuffers(xw.dpy, swpinfo, 1);
  1817. }
  1818. void
  1819. xdrawcursor(void) {
  1820. static int oldx = 0;
  1821. static int oldy = 0;
  1822. int sl;
  1823. Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
  1824. LIMIT(oldx, 0, term.col-1);
  1825. LIMIT(oldy, 0, term.row-1);
  1826. if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
  1827. memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
  1828. /* remove the old cursor */
  1829. if(term.line[oldy][oldx].state & GLYPH_SET) {
  1830. sl = utf8size(term.line[oldy][oldx].c);
  1831. xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
  1832. } else
  1833. xclear(oldx, oldy, oldx, oldy);
  1834. xcopy(oldx, oldy, 1, 1);
  1835. /* draw the new one */
  1836. if(!(term.c.state & CURSOR_HIDE)) {
  1837. if(!(xw.state & WIN_FOCUSED))
  1838. g.bg = DefaultUCS;
  1839. if(IS_SET(MODE_REVERSE))
  1840. g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
  1841. sl = utf8size(g.c);
  1842. xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
  1843. oldx = term.c.x, oldy = term.c.y;
  1844. }
  1845. xcopy(term.c.x, term.c.y, 1, 1);
  1846. }
  1847. void
  1848. redraw(void) {
  1849. struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
  1850. tfulldirt();
  1851. draw();
  1852. nanosleep(&tv, NULL);
  1853. }
  1854. void
  1855. draw() {
  1856. drawregion(0, 0, term.col, term.row);
  1857. xcopy();
  1858. gettimeofday(&xw.lastdraw, NULL);
  1859. }
  1860. void
  1861. drawregion(int x1, int y1, int x2, int y2) {
  1862. int ic, ib, x, y, ox, sl;
  1863. Glyph base, new;
  1864. char buf[DRAW_BUF_SIZ];
  1865. if(!(xw.state & WIN_VISIBLE))
  1866. return;
  1867. for(y = y1; y < y2; y++) {
  1868. if(!term.dirty[y])
  1869. continue;
  1870. xclear(0, y, term.col, y);
  1871. term.dirty[y] = 0;
  1872. base = term.line[y][0];
  1873. ic = ib = ox = 0;
  1874. for(x = x1; x < x2; x++) {
  1875. new = term.line[y][x];
  1876. if(sel.bx != -1 && *(new.c) && selected(x, y))
  1877. new.mode ^= ATTR_REVERSE;
  1878. if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
  1879. ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
  1880. xdraws(buf, base, ox, y, ic, ib);
  1881. ic = ib = 0;
  1882. }
  1883. if(new.state & GLYPH_SET) {
  1884. if(ib == 0) {
  1885. ox = x;
  1886. base = new;
  1887. }
  1888. sl = utf8size(new.c);
  1889. memcpy(buf+ib, new.c, sl);
  1890. ib += sl;
  1891. ++ic;
  1892. }
  1893. }
  1894. if(ib > 0)
  1895. xdraws(buf, base, ox, y, ic, ib);
  1896. }
  1897. xdrawcursor();
  1898. }
  1899. void
  1900. expose(XEvent *ev) {
  1901. XExposeEvent *e = &ev->xexpose;
  1902. if(xw.state & WIN_REDRAW) {
  1903. if(!e->count)
  1904. xw.state &= ~WIN_REDRAW;
  1905. }
  1906. xcopy();
  1907. }
  1908. void
  1909. visibility(XEvent *ev) {
  1910. XVisibilityEvent *e = &ev->xvisibility;
  1911. if(e->state == VisibilityFullyObscured)
  1912. xw.state &= ~WIN_VISIBLE;
  1913. else if(!(xw.state & WIN_VISIBLE))
  1914. /* need a full redraw for next Expose, not just a buf copy */
  1915. xw.state |= WIN_VISIBLE | WIN_REDRAW;
  1916. }
  1917. void
  1918. unmap(XEvent *ev) {
  1919. xw.state &= ~WIN_VISIBLE;
  1920. }
  1921. void
  1922. xseturgency(int add) {
  1923. XWMHints *h = XGetWMHints(xw.dpy, xw.win);
  1924. h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
  1925. XSetWMHints(xw.dpy, xw.win, h);
  1926. XFree(h);
  1927. }
  1928. void
  1929. focus(XEvent *ev) {
  1930. if(ev->type == FocusIn) {
  1931. xw.state |= WIN_FOCUSED;
  1932. xseturgency(0);
  1933. } else
  1934. xw.state &= ~WIN_FOCUSED;
  1935. draw();
  1936. }
  1937. char*
  1938. kmap(KeySym k, uint state) {
  1939. int i;
  1940. state &= ~Mod2Mask;
  1941. for(i = 0; i < LEN(key); i++) {
  1942. uint mask = key[i].mask;
  1943. if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
  1944. return (char*)key[i].s;
  1945. }
  1946. return NULL;
  1947. }
  1948. void
  1949. kpress(XEvent *ev) {
  1950. XKeyEvent *e = &ev->xkey;
  1951. KeySym ksym;
  1952. char buf[32];
  1953. char *customkey;
  1954. int len;
  1955. int meta;
  1956. int shift;
  1957. Status status;
  1958. meta = e->state & Mod1Mask;
  1959. shift = e->state & ShiftMask;
  1960. len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
  1961. /* 1. custom keys from config.h */
  1962. if((customkey = kmap(ksym, e->state)))
  1963. ttywrite(customkey, strlen(customkey));
  1964. /* 2. hardcoded (overrides X lookup) */
  1965. else
  1966. switch(ksym) {
  1967. case XK_Up:
  1968. case XK_Down:
  1969. case XK_Left:
  1970. case XK_Right:
  1971. /* XXX: shift up/down doesn't work */
  1972. sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
  1973. ttywrite(buf, 3);
  1974. break;
  1975. case XK_Insert:
  1976. if(shift)
  1977. selpaste();
  1978. break;
  1979. case XK_Return:
  1980. if(IS_SET(MODE_CRLF))
  1981. ttywrite("\r\n", 2);
  1982. else
  1983. ttywrite("\r", 1);
  1984. break;
  1985. /* 3. X lookup */
  1986. default:
  1987. if(len > 0) {
  1988. if(meta && len == 1)
  1989. ttywrite("\033", 1);
  1990. ttywrite(buf, len);
  1991. }
  1992. break;
  1993. }
  1994. }
  1995. void
  1996. cmessage(XEvent *e) {
  1997. /* See xembed specs
  1998. http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
  1999. if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
  2000. if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
  2001. xw.state |= WIN_FOCUSED;
  2002. xseturgency(0);
  2003. } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
  2004. xw.state &= ~WIN_FOCUSED;
  2005. }
  2006. draw();
  2007. }
  2008. }
  2009. void
  2010. resize(XEvent *e) {
  2011. int col, row;
  2012. if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
  2013. return;
  2014. xw.w = e->xconfigure.width;
  2015. xw.h = e->xconfigure.height;
  2016. col = (xw.w - 2*BORDER) / xw.cw;
  2017. row = (xw.h - 2*BORDER) / xw.ch;
  2018. if(col == term.col && row == term.row)
  2019. return;
  2020. if(tresize(col, row))
  2021. draw();
  2022. ttyresize(col, row);
  2023. xresize(col, row);
  2024. }
  2025. bool
  2026. last_draw_too_old(void) {
  2027. struct timeval now;
  2028. gettimeofday(&now, NULL);
  2029. return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
  2030. }
  2031. void
  2032. run(void) {
  2033. XEvent ev;
  2034. fd_set rfd;
  2035. int xfd = XConnectionNumber(xw.dpy);
  2036. struct timeval timeout = {0};
  2037. bool stuff_to_print = 0;
  2038. for(;;) {
  2039. FD_ZERO(&rfd);
  2040. FD_SET(cmdfd, &rfd);
  2041. FD_SET(xfd, &rfd);
  2042. timeout.tv_sec = 0;
  2043. timeout.tv_usec = SELECT_TIMEOUT;
  2044. if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
  2045. if(errno == EINTR)
  2046. continue;
  2047. die("select failed: %s\n", SERRNO);
  2048. }
  2049. if(FD_ISSET(cmdfd, &rfd)) {
  2050. ttyread();
  2051. stuff_to_print = 1;
  2052. }
  2053. if(stuff_to_print && last_draw_too_old()) {
  2054. stuff_to_print = 0;
  2055. draw();
  2056. }
  2057. while(XPending(xw.dpy)) {
  2058. XNextEvent(xw.dpy, &ev);
  2059. if(XFilterEvent(&ev, xw.win))
  2060. continue;
  2061. if(handler[ev.type])
  2062. (handler[ev.type])(&ev);
  2063. }
  2064. }
  2065. }
  2066. int
  2067. main(int argc, char *argv[]) {
  2068. int i, bitm, xr, yr;
  2069. unsigned int wr, hr;
  2070. xw.fw = xw.fh = xw.fx = xw.fy = 0;
  2071. for(i = 1; i < argc; i++) {
  2072. switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
  2073. case 't':
  2074. if(++i < argc) opt_title = argv[i];
  2075. break;
  2076. case 'c':
  2077. if(++i < argc) opt_class = argv[i];
  2078. break;
  2079. case 'w':
  2080. if(++i < argc) opt_embed = argv[i];
  2081. break;
  2082. case 'f':
  2083. if (++i < argc) opt_io = argv[i];
  2084. break;
  2085. case 'e':
  2086. /* eat every remaining arguments */
  2087. if(++i < argc) opt_cmd = &argv[i];
  2088. goto run;
  2089. case 'g':
  2090. if(++i >= argc)
  2091. break;
  2092. bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
  2093. if(bitm & XValue)
  2094. xw.fx = xr;
  2095. if(bitm & YValue)
  2096. xw.fy = yr;
  2097. if(bitm & WidthValue)
  2098. xw.fw = (int)wr;
  2099. if(bitm & HeightValue)
  2100. xw.fh = (int)hr;
  2101. if(bitm & XNegative && xw.fx == 0)
  2102. xw.fx = -1;
  2103. if(bitm & XNegative && xw.fy == 0)
  2104. xw.fy = -1;
  2105. if(xw.fh != 0 && xw.fw != 0)
  2106. xw.isfixed = True;
  2107. break;
  2108. case 'v':
  2109. default:
  2110. die(USAGE);
  2111. }
  2112. }
  2113. run:
  2114. setlocale(LC_CTYPE, "");
  2115. tnew(80, 24);
  2116. ttynew();
  2117. xinit();
  2118. selinit();
  2119. run();
  2120. return 0;
  2121. }