st.c 57 KB

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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. #include <X11/Xft/Xft.h>
  29. #define Glyph Glyph_
  30. #define Font Font_
  31. #if defined(__linux)
  32. #include <pty.h>
  33. #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
  34. #include <util.h>
  35. #elif defined(__FreeBSD__) || defined(__DragonFly__)
  36. #include <libutil.h>
  37. #endif
  38. #define USAGE \
  39. "st " VERSION " (c) 2010-2012 st engineers\n" \
  40. "usage: st [-t title] [-c class] [-g geometry]" \
  41. " [-w windowid] [-v] [-f file] [-e command...]\n"
  42. /* XEMBED messages */
  43. #define XEMBED_FOCUS_IN 4
  44. #define XEMBED_FOCUS_OUT 5
  45. /* Arbitrary sizes */
  46. #define ESC_BUF_SIZ 256
  47. #define ESC_ARG_SIZ 16
  48. #define STR_BUF_SIZ 256
  49. #define STR_ARG_SIZ 16
  50. #define DRAW_BUF_SIZ 20*1024
  51. #define UTF_SIZ 4
  52. #define XK_NO_MOD UINT_MAX
  53. #define XK_ANY_MOD 0
  54. #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
  55. #define SERRNO strerror(errno)
  56. #define MIN(a, b) ((a) < (b) ? (a) : (b))
  57. #define MAX(a, b) ((a) < (b) ? (b) : (a))
  58. #define LEN(a) (sizeof(a) / sizeof(a[0]))
  59. #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
  60. #define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
  61. #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  62. #define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
  63. #define IS_SET(flag) (term.mode & (flag))
  64. #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
  65. #define X2COL(x) (((x) - BORDER)/xw.cw)
  66. #define Y2ROW(y) (((y) - BORDER)/xw.ch)
  67. enum glyph_attribute {
  68. ATTR_NULL = 0,
  69. ATTR_REVERSE = 1,
  70. ATTR_UNDERLINE = 2,
  71. ATTR_BOLD = 4,
  72. ATTR_GFX = 8,
  73. ATTR_ITALIC = 16,
  74. ATTR_BLINK = 32,
  75. };
  76. enum cursor_movement {
  77. CURSOR_UP,
  78. CURSOR_DOWN,
  79. CURSOR_LEFT,
  80. CURSOR_RIGHT,
  81. CURSOR_SAVE,
  82. CURSOR_LOAD
  83. };
  84. enum cursor_state {
  85. CURSOR_DEFAULT = 0,
  86. CURSOR_HIDE = 1,
  87. CURSOR_WRAPNEXT = 2
  88. };
  89. enum glyph_state {
  90. GLYPH_SET = 1,
  91. GLYPH_DIRTY = 2
  92. };
  93. enum term_mode {
  94. MODE_WRAP = 1,
  95. MODE_INSERT = 2,
  96. MODE_APPKEYPAD = 4,
  97. MODE_ALTSCREEN = 8,
  98. MODE_CRLF = 16,
  99. MODE_MOUSEBTN = 32,
  100. MODE_MOUSEMOTION = 64,
  101. MODE_MOUSE = 32|64,
  102. MODE_REVERSE = 128,
  103. MODE_KBDLOCK = 256
  104. };
  105. enum escape_state {
  106. ESC_START = 1,
  107. ESC_CSI = 2,
  108. ESC_STR = 4, /* DSC, OSC, PM, APC */
  109. ESC_ALTCHARSET = 8,
  110. ESC_STR_END = 16, /* a final string was encountered */
  111. };
  112. enum window_state {
  113. WIN_VISIBLE = 1,
  114. WIN_REDRAW = 2,
  115. WIN_FOCUSED = 4
  116. };
  117. /* bit macro */
  118. #undef B0
  119. enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
  120. typedef unsigned char uchar;
  121. typedef unsigned int uint;
  122. typedef unsigned long ulong;
  123. typedef unsigned short ushort;
  124. typedef struct {
  125. char c[UTF_SIZ]; /* character code */
  126. uchar mode; /* attribute flags */
  127. ushort fg; /* foreground */
  128. ushort bg; /* background */
  129. uchar state; /* state flags */
  130. } Glyph;
  131. typedef Glyph* Line;
  132. typedef struct {
  133. Glyph attr; /* current char attributes */
  134. int x;
  135. int y;
  136. char state;
  137. } TCursor;
  138. /* CSI Escape sequence structs */
  139. /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
  140. typedef struct {
  141. char buf[ESC_BUF_SIZ]; /* raw string */
  142. int len; /* raw string length */
  143. char priv;
  144. int arg[ESC_ARG_SIZ];
  145. int narg; /* nb of args */
  146. char mode;
  147. } CSIEscape;
  148. /* STR Escape sequence structs */
  149. /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
  150. typedef struct {
  151. char type; /* ESC type ... */
  152. char buf[STR_BUF_SIZ]; /* raw string */
  153. int len; /* raw string length */
  154. char *args[STR_ARG_SIZ];
  155. int narg; /* nb of args */
  156. } STREscape;
  157. /* Internal representation of the screen */
  158. typedef struct {
  159. int row; /* nb row */
  160. int col; /* nb col */
  161. Line* line; /* screen */
  162. Line* alt; /* alternate screen */
  163. bool* dirty; /* dirtyness of lines */
  164. TCursor c; /* cursor */
  165. int top; /* top scroll limit */
  166. int bot; /* bottom scroll limit */
  167. int mode; /* terminal mode flags */
  168. int esc; /* escape state flags */
  169. bool *tabs;
  170. } Term;
  171. /* Purely graphic info */
  172. typedef struct {
  173. Display* dpy;
  174. Colormap cmap;
  175. Window win;
  176. XdbeBackBuffer buf;
  177. Atom xembed;
  178. XIM xim;
  179. XIC xic;
  180. XftDraw *xft_draw;
  181. Visual *vis;
  182. int scr;
  183. bool isfixed; /* is fixed geometry? */
  184. int fx, fy, fw, fh; /* fixed geometry */
  185. int tw, th; /* tty width and height */
  186. int w; /* window width */
  187. int h; /* window height */
  188. int ch; /* char height */
  189. int cw; /* char width */
  190. char state; /* focus, redraw, visible */
  191. } XWindow;
  192. typedef struct {
  193. KeySym k;
  194. uint mask;
  195. char s[ESC_BUF_SIZ];
  196. } Key;
  197. /* TODO: use better name for vars... */
  198. typedef struct {
  199. int mode;
  200. int bx, by;
  201. int ex, ey;
  202. struct {int x, y;} b, e;
  203. char *clip;
  204. Atom xtarget;
  205. bool alt;
  206. struct timeval tclick1;
  207. struct timeval tclick2;
  208. } Selection;
  209. #include "config.h"
  210. /* Font structure */
  211. typedef struct {
  212. int ascent;
  213. int descent;
  214. short lbearing;
  215. short rbearing;
  216. XftFont* xft_set;
  217. } Font;
  218. /* Drawing Context */
  219. typedef struct {
  220. XftColor xft_col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
  221. GC gc;
  222. Font font, bfont, ifont, ibfont;
  223. } DC;
  224. static void die(const char*, ...);
  225. static void draw(void);
  226. static void redraw(void);
  227. static void drawregion(int, int, int, int);
  228. static void execsh(void);
  229. static void sigchld(int);
  230. static void run(void);
  231. static void csidump(void);
  232. static void csihandle(void);
  233. static void csiparse(void);
  234. static void csireset(void);
  235. static void strdump(void);
  236. static void strhandle(void);
  237. static void strparse(void);
  238. static void strreset(void);
  239. static void tclearregion(int, int, int, int);
  240. static void tcursor(int);
  241. static void tdeletechar(int);
  242. static void tdeleteline(int);
  243. static void tinsertblank(int);
  244. static void tinsertblankline(int);
  245. static void tmoveto(int, int);
  246. static void tnew(int, int);
  247. static void tnewline(int);
  248. static void tputtab(bool);
  249. static void tputc(char*, int);
  250. static void treset(void);
  251. static int tresize(int, int);
  252. static void tscrollup(int, int);
  253. static void tscrolldown(int, int);
  254. static void tsetattr(int*, int);
  255. static void tsetchar(char*);
  256. static void tsetscroll(int, int);
  257. static void tswapscreen(void);
  258. static void tsetdirt(int, int);
  259. static void tsetmode(bool, bool, int *, int);
  260. static void tfulldirt(void);
  261. static void ttynew(void);
  262. static void ttyread(void);
  263. static void ttyresize(void);
  264. static void ttywrite(const char *, size_t);
  265. static void xdraws(char *, Glyph, int, int, int, int);
  266. static void xhints(void);
  267. static void xclear(int, int, int, int);
  268. static void xclearborders(void);
  269. static void xdrawcursor(void);
  270. static void xinit(void);
  271. static void xloadcols(void);
  272. static void xresettitle(void);
  273. static void xseturgency(int);
  274. static void xsetsel(char*);
  275. static void xtermclear(int, int, int, int);
  276. static void xresize(int, int);
  277. static void expose(XEvent *);
  278. static void visibility(XEvent *);
  279. static void unmap(XEvent *);
  280. static char* kmap(KeySym, uint);
  281. static void kpress(XEvent *);
  282. static void cmessage(XEvent *);
  283. static void resize(XEvent *);
  284. static void focus(XEvent *);
  285. static void brelease(XEvent *);
  286. static void bpress(XEvent *);
  287. static void bmotion(XEvent *);
  288. static void selnotify(XEvent *);
  289. static void selclear(XEvent *);
  290. static void selrequest(XEvent *);
  291. static void selinit(void);
  292. static inline bool selected(int, int);
  293. static void selcopy(void);
  294. static void selpaste(void);
  295. static void selscroll(int, int);
  296. static int utf8decode(char *, long *);
  297. static int utf8encode(long *, char *);
  298. static int utf8size(char *);
  299. static int isfullutf8(char *, int);
  300. static void *xmalloc(size_t);
  301. static void *xrealloc(void *, size_t);
  302. static void *xcalloc(size_t nmemb, size_t size);
  303. static char *smstrcat(char *, ...);
  304. static void (*handler[LASTEvent])(XEvent *) = {
  305. [KeyPress] = kpress,
  306. [ClientMessage] = cmessage,
  307. [ConfigureNotify] = resize,
  308. [VisibilityNotify] = visibility,
  309. [UnmapNotify] = unmap,
  310. [Expose] = expose,
  311. [FocusIn] = focus,
  312. [FocusOut] = focus,
  313. [MotionNotify] = bmotion,
  314. [ButtonPress] = bpress,
  315. [ButtonRelease] = brelease,
  316. [SelectionClear] = selclear,
  317. [SelectionNotify] = selnotify,
  318. [SelectionRequest] = selrequest,
  319. };
  320. /* Globals */
  321. static DC dc;
  322. static XWindow xw;
  323. static Term term;
  324. static CSIEscape csiescseq;
  325. static STREscape strescseq;
  326. static int cmdfd;
  327. static pid_t pid;
  328. static Selection sel;
  329. static int iofd = -1;
  330. static char **opt_cmd = NULL;
  331. static char *opt_io = NULL;
  332. static char *opt_title = NULL;
  333. static char *opt_embed = NULL;
  334. static char *opt_class = NULL;
  335. void *
  336. xmalloc(size_t len) {
  337. void *p = malloc(len);
  338. if(!p)
  339. die("Out of memory\n");
  340. return p;
  341. }
  342. void *
  343. xrealloc(void *p, size_t len) {
  344. if((p = realloc(p, len)) == NULL)
  345. die("Out of memory\n");
  346. return p;
  347. }
  348. void *
  349. xcalloc(size_t nmemb, size_t size) {
  350. void *p = calloc(nmemb, size);
  351. if(!p)
  352. die("Out of memory\n");
  353. return p;
  354. }
  355. char *
  356. smstrcat(char *src, ...)
  357. {
  358. va_list fmtargs;
  359. char *ret, *p, *v;
  360. int len, slen, flen;
  361. len = slen = strlen(src);
  362. va_start(fmtargs, src);
  363. for(;;) {
  364. v = va_arg(fmtargs, char *);
  365. if(v == NULL)
  366. break;
  367. len += strlen(v);
  368. }
  369. va_end(fmtargs);
  370. p = ret = xmalloc(len+1);
  371. memmove(p, src, slen);
  372. p += slen;
  373. va_start(fmtargs, src);
  374. for(;;) {
  375. v = va_arg(fmtargs, char *);
  376. if(v == NULL)
  377. break;
  378. flen = strlen(v);
  379. memmove(p, v, flen);
  380. p += flen;
  381. }
  382. va_end(fmtargs);
  383. ret[len] = '\0';
  384. return ret;
  385. }
  386. int
  387. utf8decode(char *s, long *u) {
  388. uchar c;
  389. int i, n, rtn;
  390. rtn = 1;
  391. c = *s;
  392. if(~c & B7) { /* 0xxxxxxx */
  393. *u = c;
  394. return rtn;
  395. } else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
  396. *u = c&(B4|B3|B2|B1|B0);
  397. n = 1;
  398. } else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
  399. *u = c&(B3|B2|B1|B0);
  400. n = 2;
  401. } else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
  402. *u = c & (B2|B1|B0);
  403. n = 3;
  404. } else
  405. goto invalid;
  406. for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
  407. c = *s;
  408. if((c & (B7|B6)) != B7) /* 10xxxxxx */
  409. goto invalid;
  410. *u <<= 6;
  411. *u |= c & (B5|B4|B3|B2|B1|B0);
  412. }
  413. if((n == 1 && *u < 0x80) ||
  414. (n == 2 && *u < 0x800) ||
  415. (n == 3 && *u < 0x10000) ||
  416. (*u >= 0xD800 && *u <= 0xDFFF))
  417. goto invalid;
  418. return rtn;
  419. invalid:
  420. *u = 0xFFFD;
  421. return rtn;
  422. }
  423. int
  424. utf8encode(long *u, char *s) {
  425. uchar *sp;
  426. ulong uc;
  427. int i, n;
  428. sp = (uchar*) s;
  429. uc = *u;
  430. if(uc < 0x80) {
  431. *sp = uc; /* 0xxxxxxx */
  432. return 1;
  433. } else if(*u < 0x800) {
  434. *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
  435. n = 1;
  436. } else if(uc < 0x10000) {
  437. *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
  438. n = 2;
  439. } else if(uc <= 0x10FFFF) {
  440. *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
  441. n = 3;
  442. } else {
  443. goto invalid;
  444. }
  445. for(i=n,++sp; i>0; --i,++sp)
  446. *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
  447. return n+1;
  448. invalid:
  449. /* U+FFFD */
  450. *s++ = '\xEF';
  451. *s++ = '\xBF';
  452. *s = '\xBD';
  453. return 3;
  454. }
  455. /* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
  456. UTF-8 otherwise return 0 */
  457. int
  458. isfullutf8(char *s, int b) {
  459. uchar *c1, *c2, *c3;
  460. c1 = (uchar *) s;
  461. c2 = (uchar *) ++s;
  462. c3 = (uchar *) ++s;
  463. if(b < 1)
  464. return 0;
  465. else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
  466. return 0;
  467. else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
  468. ((b == 1) ||
  469. ((b == 2) && (*c2&(B7|B6)) == B7)))
  470. return 0;
  471. else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
  472. ((b == 1) ||
  473. ((b == 2) && (*c2&(B7|B6)) == B7) ||
  474. ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
  475. return 0;
  476. else
  477. return 1;
  478. }
  479. int
  480. utf8size(char *s) {
  481. uchar c = *s;
  482. if(~c&B7)
  483. return 1;
  484. else if((c&(B7|B6|B5)) == (B7|B6))
  485. return 2;
  486. else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
  487. return 3;
  488. else
  489. return 4;
  490. }
  491. void
  492. selinit(void) {
  493. memset(&sel.tclick1, 0, sizeof(sel.tclick1));
  494. memset(&sel.tclick2, 0, sizeof(sel.tclick2));
  495. sel.mode = 0;
  496. sel.bx = -1;
  497. sel.clip = NULL;
  498. sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
  499. if(sel.xtarget == None)
  500. sel.xtarget = XA_STRING;
  501. }
  502. static inline bool
  503. selected(int x, int y) {
  504. if(sel.ey == y && sel.by == y) {
  505. int bx = MIN(sel.bx, sel.ex);
  506. int ex = MAX(sel.bx, sel.ex);
  507. return BETWEEN(x, bx, ex);
  508. }
  509. return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
  510. || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
  511. }
  512. void
  513. getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
  514. if(b)
  515. *b = e->xbutton.button;
  516. *x = X2COL(e->xbutton.x);
  517. *y = Y2ROW(e->xbutton.y);
  518. sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
  519. sel.b.y = MIN(sel.by, sel.ey);
  520. sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
  521. sel.e.y = MAX(sel.by, sel.ey);
  522. }
  523. void
  524. mousereport(XEvent *e) {
  525. int x = X2COL(e->xbutton.x);
  526. int y = Y2ROW(e->xbutton.y);
  527. int button = e->xbutton.button;
  528. int state = e->xbutton.state;
  529. char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
  530. static int ob, ox, oy;
  531. /* from urxvt */
  532. if(e->xbutton.type == MotionNotify) {
  533. if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
  534. return;
  535. button = ob + 32;
  536. ox = x, oy = y;
  537. } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
  538. button = 3;
  539. } else {
  540. button -= Button1;
  541. if(button >= 3)
  542. button += 64 - 3;
  543. if(e->xbutton.type == ButtonPress) {
  544. ob = button;
  545. ox = x, oy = y;
  546. }
  547. }
  548. buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
  549. + (state & Mod4Mask ? 8 : 0)
  550. + (state & ControlMask ? 16 : 0);
  551. ttywrite(buf, sizeof(buf));
  552. }
  553. void
  554. bpress(XEvent *e) {
  555. if(IS_SET(MODE_MOUSE))
  556. mousereport(e);
  557. else if(e->xbutton.button == Button1) {
  558. if(sel.bx != -1) {
  559. sel.bx = -1;
  560. tsetdirt(sel.b.y, sel.e.y);
  561. draw();
  562. }
  563. sel.mode = 1;
  564. sel.ex = sel.bx = X2COL(e->xbutton.x);
  565. sel.ey = sel.by = Y2ROW(e->xbutton.y);
  566. }
  567. }
  568. void
  569. selcopy(void) {
  570. char *str, *ptr;
  571. int x, y, bufsize, is_selected = 0;
  572. if(sel.bx == -1)
  573. str = NULL;
  574. else {
  575. bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
  576. ptr = str = xmalloc(bufsize);
  577. /* append every set & selected glyph to the selection */
  578. for(y = 0; y < term.row; y++) {
  579. for(x = 0; x < term.col; x++) {
  580. int size;
  581. char *p;
  582. Glyph *gp = &term.line[y][x];
  583. if(!(is_selected = selected(x, y)))
  584. continue;
  585. p = (gp->state & GLYPH_SET) ? gp->c : " ";
  586. size = utf8size(p);
  587. memcpy(ptr, p, size);
  588. ptr += size;
  589. }
  590. /* \n at the end of every selected line except for the last one */
  591. if(is_selected && y < sel.e.y)
  592. *ptr++ = '\n';
  593. }
  594. *ptr = 0;
  595. }
  596. sel.alt = IS_SET(MODE_ALTSCREEN);
  597. xsetsel(str);
  598. }
  599. void
  600. selnotify(XEvent *e) {
  601. ulong nitems, ofs, rem;
  602. int format;
  603. uchar *data;
  604. Atom type;
  605. ofs = 0;
  606. do {
  607. if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
  608. False, AnyPropertyType, &type, &format,
  609. &nitems, &rem, &data)) {
  610. fprintf(stderr, "Clipboard allocation failed\n");
  611. return;
  612. }
  613. ttywrite((const char *) data, nitems * format / 8);
  614. XFree(data);
  615. /* number of 32-bit chunks returned */
  616. ofs += nitems * format / 32;
  617. } while(rem > 0);
  618. }
  619. void
  620. selpaste() {
  621. XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
  622. }
  623. void selclear(XEvent *e) {
  624. if(sel.bx == -1)
  625. return;
  626. sel.bx = -1;
  627. tsetdirt(sel.b.y, sel.e.y);
  628. }
  629. void
  630. selrequest(XEvent *e) {
  631. XSelectionRequestEvent *xsre;
  632. XSelectionEvent xev;
  633. Atom xa_targets;
  634. xsre = (XSelectionRequestEvent *) e;
  635. xev.type = SelectionNotify;
  636. xev.requestor = xsre->requestor;
  637. xev.selection = xsre->selection;
  638. xev.target = xsre->target;
  639. xev.time = xsre->time;
  640. /* reject */
  641. xev.property = None;
  642. xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
  643. if(xsre->target == xa_targets) {
  644. /* respond with the supported type */
  645. Atom string = sel.xtarget;
  646. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  647. XA_ATOM, 32, PropModeReplace,
  648. (uchar *) &string, 1);
  649. xev.property = xsre->property;
  650. } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
  651. XChangeProperty(xsre->display, xsre->requestor, xsre->property,
  652. xsre->target, 8, PropModeReplace,
  653. (uchar *) sel.clip, strlen(sel.clip));
  654. xev.property = xsre->property;
  655. }
  656. /* all done, send a notification to the listener */
  657. if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
  658. fprintf(stderr, "Error sending SelectionNotify event\n");
  659. }
  660. void
  661. xsetsel(char *str) {
  662. /* register the selection for both the clipboard and the primary */
  663. Atom clipboard;
  664. free(sel.clip);
  665. sel.clip = str;
  666. XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
  667. clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
  668. XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
  669. }
  670. void
  671. brelease(XEvent *e) {
  672. if(IS_SET(MODE_MOUSE)) {
  673. mousereport(e);
  674. return;
  675. }
  676. if(e->xbutton.button == Button2)
  677. selpaste();
  678. else if(e->xbutton.button == Button1) {
  679. sel.mode = 0;
  680. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  681. term.dirty[sel.ey] = 1;
  682. if(sel.bx == sel.ex && sel.by == sel.ey) {
  683. struct timeval now;
  684. sel.bx = -1;
  685. gettimeofday(&now, NULL);
  686. if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
  687. /* triple click on the line */
  688. sel.b.x = sel.bx = 0;
  689. sel.e.x = sel.ex = term.col;
  690. sel.b.y = sel.e.y = sel.ey;
  691. selcopy();
  692. } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
  693. /* double click to select word */
  694. sel.bx = sel.ex;
  695. while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
  696. term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
  697. sel.b.x = sel.bx;
  698. while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
  699. term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
  700. sel.e.x = sel.ex;
  701. sel.b.y = sel.e.y = sel.ey;
  702. selcopy();
  703. }
  704. } else
  705. selcopy();
  706. }
  707. memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
  708. gettimeofday(&sel.tclick1, NULL);
  709. }
  710. void
  711. bmotion(XEvent *e) {
  712. if(IS_SET(MODE_MOUSE)) {
  713. mousereport(e);
  714. return;
  715. }
  716. if(sel.mode) {
  717. int oldey = sel.ey, oldex = sel.ex;
  718. getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
  719. if(oldey != sel.ey || oldex != sel.ex) {
  720. int starty = MIN(oldey, sel.ey);
  721. int endy = MAX(oldey, sel.ey);
  722. tsetdirt(starty, endy);
  723. }
  724. }
  725. }
  726. void
  727. die(const char *errstr, ...) {
  728. va_list ap;
  729. va_start(ap, errstr);
  730. vfprintf(stderr, errstr, ap);
  731. va_end(ap);
  732. exit(EXIT_FAILURE);
  733. }
  734. void
  735. execsh(void) {
  736. char **args;
  737. char *envshell = getenv("SHELL");
  738. unsetenv("COLUMNS");
  739. unsetenv("LINES");
  740. unsetenv("TERMCAP");
  741. signal(SIGCHLD, SIG_DFL);
  742. signal(SIGHUP, SIG_DFL);
  743. signal(SIGINT, SIG_DFL);
  744. signal(SIGQUIT, SIG_DFL);
  745. signal(SIGTERM, SIG_DFL);
  746. signal(SIGALRM, SIG_DFL);
  747. DEFAULT(envshell, SHELL);
  748. putenv("TERM="TNAME);
  749. args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
  750. execvp(args[0], args);
  751. exit(EXIT_FAILURE);
  752. }
  753. void
  754. sigchld(int a) {
  755. int stat = 0;
  756. if(waitpid(pid, &stat, 0) < 0)
  757. die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
  758. if(WIFEXITED(stat))
  759. exit(WEXITSTATUS(stat));
  760. else
  761. exit(EXIT_FAILURE);
  762. }
  763. void
  764. ttynew(void) {
  765. int m, s;
  766. /* seems to work fine on linux, openbsd and freebsd */
  767. struct winsize w = {term.row, term.col, 0, 0};
  768. if(openpty(&m, &s, NULL, NULL, &w) < 0)
  769. die("openpty failed: %s\n", SERRNO);
  770. switch(pid = fork()) {
  771. case -1:
  772. die("fork failed\n");
  773. break;
  774. case 0:
  775. setsid(); /* create a new process group */
  776. dup2(s, STDIN_FILENO);
  777. dup2(s, STDOUT_FILENO);
  778. dup2(s, STDERR_FILENO);
  779. if(ioctl(s, TIOCSCTTY, NULL) < 0)
  780. die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
  781. close(s);
  782. close(m);
  783. execsh();
  784. break;
  785. default:
  786. close(s);
  787. cmdfd = m;
  788. signal(SIGCHLD, sigchld);
  789. if(opt_io) {
  790. if(!strcmp(opt_io, "-")) {
  791. iofd = STDOUT_FILENO;
  792. } else {
  793. if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
  794. fprintf(stderr, "Error opening %s:%s\n",
  795. opt_io, strerror(errno));
  796. }
  797. }
  798. }
  799. }
  800. }
  801. void
  802. dump(char c) {
  803. static int col;
  804. fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
  805. if(++col % 10 == 0)
  806. fprintf(stderr, "\n");
  807. }
  808. void
  809. ttyread(void) {
  810. static char buf[BUFSIZ];
  811. static int buflen = 0;
  812. char *ptr;
  813. char s[UTF_SIZ];
  814. int charsize; /* size of utf8 char in bytes */
  815. long utf8c;
  816. int ret;
  817. /* append read bytes to unprocessed bytes */
  818. if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
  819. die("Couldn't read from shell: %s\n", SERRNO);
  820. /* process every complete utf8 char */
  821. buflen += ret;
  822. ptr = buf;
  823. while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
  824. charsize = utf8decode(ptr, &utf8c);
  825. utf8encode(&utf8c, s);
  826. tputc(s, charsize);
  827. ptr += charsize;
  828. buflen -= charsize;
  829. }
  830. /* keep any uncomplete utf8 char for the next call */
  831. memmove(buf, ptr, buflen);
  832. }
  833. void
  834. ttywrite(const char *s, size_t n) {
  835. if(write(cmdfd, s, n) == -1)
  836. die("write error on tty: %s\n", SERRNO);
  837. }
  838. void
  839. ttyresize(void) {
  840. struct winsize w;
  841. w.ws_row = term.row;
  842. w.ws_col = term.col;
  843. w.ws_xpixel = xw.tw;
  844. w.ws_ypixel = xw.th;
  845. if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
  846. fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
  847. }
  848. void
  849. tsetdirt(int top, int bot)
  850. {
  851. int i;
  852. LIMIT(top, 0, term.row-1);
  853. LIMIT(bot, 0, term.row-1);
  854. for(i = top; i <= bot; i++)
  855. term.dirty[i] = 1;
  856. }
  857. void
  858. tfulldirt(void)
  859. {
  860. tsetdirt(0, term.row-1);
  861. }
  862. void
  863. tcursor(int mode) {
  864. static TCursor c;
  865. if(mode == CURSOR_SAVE)
  866. c = term.c;
  867. else if(mode == CURSOR_LOAD)
  868. term.c = c, tmoveto(c.x, c.y);
  869. }
  870. void
  871. treset(void) {
  872. uint i;
  873. term.c = (TCursor){{
  874. .mode = ATTR_NULL,
  875. .fg = DefaultFG,
  876. .bg = DefaultBG
  877. }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
  878. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  879. for(i = TAB; i < term.col; i += TAB)
  880. term.tabs[i] = 1;
  881. term.top = 0, term.bot = term.row - 1;
  882. term.mode = MODE_WRAP;
  883. tclearregion(0, 0, term.col-1, term.row-1);
  884. }
  885. void
  886. tnew(int col, int row) {
  887. /* set screen size */
  888. term.row = row, term.col = col;
  889. term.line = xmalloc(term.row * sizeof(Line));
  890. term.alt = xmalloc(term.row * sizeof(Line));
  891. term.dirty = xmalloc(term.row * sizeof(*term.dirty));
  892. term.tabs = xmalloc(term.col * sizeof(*term.tabs));
  893. for(row = 0; row < term.row; row++) {
  894. term.line[row] = xmalloc(term.col * sizeof(Glyph));
  895. term.alt [row] = xmalloc(term.col * sizeof(Glyph));
  896. term.dirty[row] = 0;
  897. }
  898. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  899. /* setup screen */
  900. treset();
  901. }
  902. void
  903. tswapscreen(void) {
  904. Line* tmp = term.line;
  905. term.line = term.alt;
  906. term.alt = tmp;
  907. term.mode ^= MODE_ALTSCREEN;
  908. tfulldirt();
  909. }
  910. void
  911. tscrolldown(int orig, int n) {
  912. int i;
  913. Line temp;
  914. LIMIT(n, 0, term.bot-orig+1);
  915. tclearregion(0, term.bot-n+1, term.col-1, term.bot);
  916. for(i = term.bot; i >= orig+n; i--) {
  917. temp = term.line[i];
  918. term.line[i] = term.line[i-n];
  919. term.line[i-n] = temp;
  920. term.dirty[i] = 1;
  921. term.dirty[i-n] = 1;
  922. }
  923. selscroll(orig, n);
  924. }
  925. void
  926. tscrollup(int orig, int n) {
  927. int i;
  928. Line temp;
  929. LIMIT(n, 0, term.bot-orig+1);
  930. tclearregion(0, orig, term.col-1, orig+n-1);
  931. for(i = orig; i <= term.bot-n; i++) {
  932. temp = term.line[i];
  933. term.line[i] = term.line[i+n];
  934. term.line[i+n] = temp;
  935. term.dirty[i] = 1;
  936. term.dirty[i+n] = 1;
  937. }
  938. selscroll(orig, -n);
  939. }
  940. void
  941. selscroll(int orig, int n) {
  942. if(sel.bx == -1)
  943. return;
  944. if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
  945. if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
  946. sel.bx = -1;
  947. return;
  948. }
  949. if(sel.by < term.top) {
  950. sel.by = term.top;
  951. sel.bx = 0;
  952. }
  953. if(sel.ey > term.bot) {
  954. sel.ey = term.bot;
  955. sel.ex = term.col;
  956. }
  957. sel.b.y = sel.by, sel.b.x = sel.bx;
  958. sel.e.y = sel.ey, sel.e.x = sel.ex;
  959. }
  960. }
  961. void
  962. tnewline(int first_col) {
  963. int y = term.c.y;
  964. if(y == term.bot)
  965. tscrollup(term.top, 1);
  966. else
  967. y++;
  968. tmoveto(first_col ? 0 : term.c.x, y);
  969. }
  970. void
  971. csiparse(void) {
  972. /* int noarg = 1; */
  973. char *p = csiescseq.buf;
  974. csiescseq.narg = 0;
  975. if(*p == '?')
  976. csiescseq.priv = 1, p++;
  977. while(p < csiescseq.buf+csiescseq.len) {
  978. while(isdigit(*p)) {
  979. csiescseq.arg[csiescseq.narg] *= 10;
  980. csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
  981. }
  982. if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
  983. csiescseq.narg++, p++;
  984. else {
  985. csiescseq.mode = *p;
  986. csiescseq.narg++;
  987. return;
  988. }
  989. }
  990. }
  991. void
  992. tmoveto(int x, int y) {
  993. LIMIT(x, 0, term.col-1);
  994. LIMIT(y, 0, term.row-1);
  995. term.c.state &= ~CURSOR_WRAPNEXT;
  996. term.c.x = x;
  997. term.c.y = y;
  998. }
  999. void
  1000. tsetchar(char *c) {
  1001. /*
  1002. * The table is proudly stolen from rxvt.
  1003. */
  1004. if(term.c.attr.mode & ATTR_GFX) {
  1005. char *vt100_0[62] = { /* 0x41 - 0x7e */
  1006. "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
  1007. 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
  1008. 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
  1009. 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
  1010. "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
  1011. "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
  1012. "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
  1013. "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
  1014. };
  1015. if(c[0] >= 0x41 && c[0] <= 0x7e
  1016. && vt100_0[c[0] - 0x41]) {
  1017. c = vt100_0[c[0] - 0x41];
  1018. }
  1019. }
  1020. term.dirty[term.c.y] = 1;
  1021. term.line[term.c.y][term.c.x] = term.c.attr;
  1022. memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
  1023. term.line[term.c.y][term.c.x].state |= GLYPH_SET;
  1024. }
  1025. void
  1026. tclearregion(int x1, int y1, int x2, int y2) {
  1027. int x, y, temp;
  1028. if(x1 > x2)
  1029. temp = x1, x1 = x2, x2 = temp;
  1030. if(y1 > y2)
  1031. temp = y1, y1 = y2, y2 = temp;
  1032. LIMIT(x1, 0, term.col-1);
  1033. LIMIT(x2, 0, term.col-1);
  1034. LIMIT(y1, 0, term.row-1);
  1035. LIMIT(y2, 0, term.row-1);
  1036. for(y = y1; y <= y2; y++) {
  1037. term.dirty[y] = 1;
  1038. for(x = x1; x <= x2; x++)
  1039. term.line[y][x].state = 0;
  1040. }
  1041. }
  1042. void
  1043. tdeletechar(int n) {
  1044. int src = term.c.x + n;
  1045. int dst = term.c.x;
  1046. int size = term.col - src;
  1047. term.dirty[term.c.y] = 1;
  1048. if(src >= term.col) {
  1049. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1050. return;
  1051. }
  1052. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  1053. tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
  1054. }
  1055. void
  1056. tinsertblank(int n) {
  1057. int src = term.c.x;
  1058. int dst = src + n;
  1059. int size = term.col - dst;
  1060. term.dirty[term.c.y] = 1;
  1061. if(dst >= term.col) {
  1062. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1063. return;
  1064. }
  1065. memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
  1066. tclearregion(src, term.c.y, dst - 1, term.c.y);
  1067. }
  1068. void
  1069. tinsertblankline(int n) {
  1070. if(term.c.y < term.top || term.c.y > term.bot)
  1071. return;
  1072. tscrolldown(term.c.y, n);
  1073. }
  1074. void
  1075. tdeleteline(int n) {
  1076. if(term.c.y < term.top || term.c.y > term.bot)
  1077. return;
  1078. tscrollup(term.c.y, n);
  1079. }
  1080. void
  1081. tsetattr(int *attr, int l) {
  1082. int i;
  1083. for(i = 0; i < l; i++) {
  1084. switch(attr[i]) {
  1085. case 0:
  1086. term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD \
  1087. | ATTR_ITALIC | ATTR_BLINK);
  1088. term.c.attr.fg = DefaultFG;
  1089. term.c.attr.bg = DefaultBG;
  1090. break;
  1091. case 1:
  1092. term.c.attr.mode |= ATTR_BOLD;
  1093. break;
  1094. case 3: /* enter standout (highlight) */
  1095. term.c.attr.mode |= ATTR_ITALIC;
  1096. break;
  1097. case 4:
  1098. term.c.attr.mode |= ATTR_UNDERLINE;
  1099. break;
  1100. case 5:
  1101. term.c.attr.mode |= ATTR_BLINK;
  1102. break;
  1103. case 7:
  1104. term.c.attr.mode |= ATTR_REVERSE;
  1105. break;
  1106. case 21:
  1107. case 22:
  1108. term.c.attr.mode &= ~ATTR_BOLD;
  1109. break;
  1110. case 23: /* leave standout (highlight) mode */
  1111. term.c.attr.mode &= ~ATTR_ITALIC;
  1112. break;
  1113. case 24:
  1114. term.c.attr.mode &= ~ATTR_UNDERLINE;
  1115. break;
  1116. case 25:
  1117. term.c.attr.mode &= ~ATTR_BLINK;
  1118. break;
  1119. case 27:
  1120. term.c.attr.mode &= ~ATTR_REVERSE;
  1121. break;
  1122. case 38:
  1123. if(i + 2 < l && attr[i + 1] == 5) {
  1124. i += 2;
  1125. if(BETWEEN(attr[i], 0, 255))
  1126. term.c.attr.fg = attr[i];
  1127. else
  1128. fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
  1129. }
  1130. else
  1131. fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
  1132. break;
  1133. case 39:
  1134. term.c.attr.fg = DefaultFG;
  1135. break;
  1136. case 48:
  1137. if(i + 2 < l && attr[i + 1] == 5) {
  1138. i += 2;
  1139. if(BETWEEN(attr[i], 0, 255))
  1140. term.c.attr.bg = attr[i];
  1141. else
  1142. fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
  1143. }
  1144. else
  1145. fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
  1146. break;
  1147. case 49:
  1148. term.c.attr.bg = DefaultBG;
  1149. break;
  1150. default:
  1151. if(BETWEEN(attr[i], 30, 37))
  1152. term.c.attr.fg = attr[i] - 30;
  1153. else if(BETWEEN(attr[i], 40, 47))
  1154. term.c.attr.bg = attr[i] - 40;
  1155. else if(BETWEEN(attr[i], 90, 97))
  1156. term.c.attr.fg = attr[i] - 90 + 8;
  1157. else if(BETWEEN(attr[i], 100, 107))
  1158. term.c.attr.bg = attr[i] - 100 + 8;
  1159. else
  1160. fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
  1161. break;
  1162. }
  1163. }
  1164. }
  1165. void
  1166. tsetscroll(int t, int b) {
  1167. int temp;
  1168. LIMIT(t, 0, term.row-1);
  1169. LIMIT(b, 0, term.row-1);
  1170. if(t > b) {
  1171. temp = t;
  1172. t = b;
  1173. b = temp;
  1174. }
  1175. term.top = t;
  1176. term.bot = b;
  1177. }
  1178. #define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
  1179. void
  1180. tsetmode(bool priv, bool set, int *args, int narg) {
  1181. int *lim, mode;
  1182. for(lim = args + narg; args < lim; ++args) {
  1183. if(priv) {
  1184. switch(*args) {
  1185. break;
  1186. case 1: /* DECCKM -- Cursor key */
  1187. MODBIT(term.mode, set, MODE_APPKEYPAD);
  1188. break;
  1189. case 5: /* DECSCNM -- Reverve video */
  1190. mode = term.mode;
  1191. MODBIT(term.mode, set, MODE_REVERSE);
  1192. if(mode != term.mode)
  1193. redraw();
  1194. break;
  1195. case 6: /* XXX: DECOM -- Origin */
  1196. break;
  1197. case 7: /* DECAWM -- Auto wrap */
  1198. MODBIT(term.mode, set, MODE_WRAP);
  1199. break;
  1200. case 8: /* XXX: DECARM -- Auto repeat */
  1201. break;
  1202. case 0: /* Error (IGNORED) */
  1203. case 12: /* att610 -- Start blinking cursor (IGNORED) */
  1204. break;
  1205. case 25:
  1206. MODBIT(term.c.state, !set, CURSOR_HIDE);
  1207. break;
  1208. case 1000: /* 1000,1002: enable xterm mouse report */
  1209. MODBIT(term.mode, set, MODE_MOUSEBTN);
  1210. break;
  1211. case 1002:
  1212. MODBIT(term.mode, set, MODE_MOUSEMOTION);
  1213. break;
  1214. case 1049: /* = 1047 and 1048 */
  1215. case 47:
  1216. case 1047:
  1217. if(IS_SET(MODE_ALTSCREEN))
  1218. tclearregion(0, 0, term.col-1, term.row-1);
  1219. if((set && !IS_SET(MODE_ALTSCREEN)) ||
  1220. (!set && IS_SET(MODE_ALTSCREEN))) {
  1221. tswapscreen();
  1222. }
  1223. if(*args != 1049)
  1224. break;
  1225. /* pass through */
  1226. case 1048:
  1227. tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
  1228. break;
  1229. default:
  1230. /* case 2: DECANM -- ANSI/VT52 (NOT SUPPOURTED) */
  1231. /* case 3: DECCOLM -- Column (NOT SUPPORTED) */
  1232. /* case 4: DECSCLM -- Scroll (NOT SUPPORTED) */
  1233. /* case 18: DECPFF -- Printer feed (NOT SUPPORTED) */
  1234. /* case 19: DECPEX -- Printer extent (NOT SUPPORTED) */
  1235. /* case 42: DECNRCM -- National characters (NOT SUPPORTED) */
  1236. fprintf(stderr,
  1237. "erresc: unknown private set/reset mode %d\n",
  1238. *args);
  1239. break;
  1240. }
  1241. } else {
  1242. switch(*args) {
  1243. case 0: /* Error (IGNORED) */
  1244. break;
  1245. case 2: /* KAM -- keyboard action */
  1246. MODBIT(term.mode, set, MODE_KBDLOCK);
  1247. break;
  1248. case 4: /* IRM -- Insertion-replacement */
  1249. MODBIT(term.mode, set, MODE_INSERT);
  1250. break;
  1251. case 12: /* XXX: SRM -- Send/Receive */
  1252. break;
  1253. case 20: /* LNM -- Linefeed/new line */
  1254. MODBIT(term.mode, set, MODE_CRLF);
  1255. break;
  1256. default:
  1257. fprintf(stderr,
  1258. "erresc: unknown set/reset mode %d\n",
  1259. *args);
  1260. break;
  1261. }
  1262. }
  1263. }
  1264. }
  1265. #undef MODBIT
  1266. void
  1267. csihandle(void) {
  1268. switch(csiescseq.mode) {
  1269. default:
  1270. unknown:
  1271. fprintf(stderr, "erresc: unknown csi ");
  1272. csidump();
  1273. /* die(""); */
  1274. break;
  1275. case '@': /* ICH -- Insert <n> blank char */
  1276. DEFAULT(csiescseq.arg[0], 1);
  1277. tinsertblank(csiescseq.arg[0]);
  1278. break;
  1279. case 'A': /* CUU -- Cursor <n> Up */
  1280. case 'e':
  1281. DEFAULT(csiescseq.arg[0], 1);
  1282. tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
  1283. break;
  1284. case 'B': /* CUD -- Cursor <n> Down */
  1285. DEFAULT(csiescseq.arg[0], 1);
  1286. tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
  1287. break;
  1288. case 'C': /* CUF -- Cursor <n> Forward */
  1289. case 'a':
  1290. DEFAULT(csiescseq.arg[0], 1);
  1291. tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
  1292. break;
  1293. case 'D': /* CUB -- Cursor <n> Backward */
  1294. DEFAULT(csiescseq.arg[0], 1);
  1295. tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
  1296. break;
  1297. case 'E': /* CNL -- Cursor <n> Down and first col */
  1298. DEFAULT(csiescseq.arg[0], 1);
  1299. tmoveto(0, term.c.y+csiescseq.arg[0]);
  1300. break;
  1301. case 'F': /* CPL -- Cursor <n> Up and first col */
  1302. DEFAULT(csiescseq.arg[0], 1);
  1303. tmoveto(0, term.c.y-csiescseq.arg[0]);
  1304. break;
  1305. case 'g': /* TBC -- Tabulation clear */
  1306. switch (csiescseq.arg[0]) {
  1307. case 0: /* clear current tab stop */
  1308. term.tabs[term.c.x] = 0;
  1309. break;
  1310. case 3: /* clear all the tabs */
  1311. memset(term.tabs, 0, term.col * sizeof(*term.tabs));
  1312. break;
  1313. default:
  1314. goto unknown;
  1315. }
  1316. break;
  1317. case 'G': /* CHA -- Move to <col> */
  1318. case '`': /* HPA */
  1319. DEFAULT(csiescseq.arg[0], 1);
  1320. tmoveto(csiescseq.arg[0]-1, term.c.y);
  1321. break;
  1322. case 'H': /* CUP -- Move to <row> <col> */
  1323. case 'f': /* HVP */
  1324. DEFAULT(csiescseq.arg[0], 1);
  1325. DEFAULT(csiescseq.arg[1], 1);
  1326. tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
  1327. break;
  1328. case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
  1329. DEFAULT(csiescseq.arg[0], 1);
  1330. while(csiescseq.arg[0]--)
  1331. tputtab(1);
  1332. break;
  1333. case 'J': /* ED -- Clear screen */
  1334. sel.bx = -1;
  1335. switch(csiescseq.arg[0]) {
  1336. case 0: /* below */
  1337. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1338. if(term.c.y < term.row-1)
  1339. tclearregion(0, term.c.y+1, term.col-1, term.row-1);
  1340. break;
  1341. case 1: /* above */
  1342. if(term.c.y > 1)
  1343. tclearregion(0, 0, term.col-1, term.c.y-1);
  1344. tclearregion(0, term.c.y, term.c.x, term.c.y);
  1345. break;
  1346. case 2: /* all */
  1347. tclearregion(0, 0, term.col-1, term.row-1);
  1348. break;
  1349. default:
  1350. goto unknown;
  1351. }
  1352. break;
  1353. case 'K': /* EL -- Clear line */
  1354. switch(csiescseq.arg[0]) {
  1355. case 0: /* right */
  1356. tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
  1357. break;
  1358. case 1: /* left */
  1359. tclearregion(0, term.c.y, term.c.x, term.c.y);
  1360. break;
  1361. case 2: /* all */
  1362. tclearregion(0, term.c.y, term.col-1, term.c.y);
  1363. break;
  1364. }
  1365. break;
  1366. case 'S': /* SU -- Scroll <n> line up */
  1367. DEFAULT(csiescseq.arg[0], 1);
  1368. tscrollup(term.top, csiescseq.arg[0]);
  1369. break;
  1370. case 'T': /* SD -- Scroll <n> line down */
  1371. DEFAULT(csiescseq.arg[0], 1);
  1372. tscrolldown(term.top, csiescseq.arg[0]);
  1373. break;
  1374. case 'L': /* IL -- Insert <n> blank lines */
  1375. DEFAULT(csiescseq.arg[0], 1);
  1376. tinsertblankline(csiescseq.arg[0]);
  1377. break;
  1378. case 'l': /* RM -- Reset Mode */
  1379. tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
  1380. break;
  1381. case 'M': /* DL -- Delete <n> lines */
  1382. DEFAULT(csiescseq.arg[0], 1);
  1383. tdeleteline(csiescseq.arg[0]);
  1384. break;
  1385. case 'X': /* ECH -- Erase <n> char */
  1386. DEFAULT(csiescseq.arg[0], 1);
  1387. tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
  1388. break;
  1389. case 'P': /* DCH -- Delete <n> char */
  1390. DEFAULT(csiescseq.arg[0], 1);
  1391. tdeletechar(csiescseq.arg[0]);
  1392. break;
  1393. case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
  1394. DEFAULT(csiescseq.arg[0], 1);
  1395. while(csiescseq.arg[0]--)
  1396. tputtab(0);
  1397. break;
  1398. case 'd': /* VPA -- Move to <row> */
  1399. DEFAULT(csiescseq.arg[0], 1);
  1400. tmoveto(term.c.x, csiescseq.arg[0]-1);
  1401. break;
  1402. case 'h': /* SM -- Set terminal mode */
  1403. tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
  1404. break;
  1405. case 'm': /* SGR -- Terminal attribute (color) */
  1406. tsetattr(csiescseq.arg, csiescseq.narg);
  1407. break;
  1408. case 'r': /* DECSTBM -- Set Scrolling Region */
  1409. if(csiescseq.priv)
  1410. goto unknown;
  1411. else {
  1412. DEFAULT(csiescseq.arg[0], 1);
  1413. DEFAULT(csiescseq.arg[1], term.row);
  1414. tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
  1415. tmoveto(0, 0);
  1416. }
  1417. break;
  1418. case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
  1419. tcursor(CURSOR_SAVE);
  1420. break;
  1421. case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
  1422. tcursor(CURSOR_LOAD);
  1423. break;
  1424. }
  1425. }
  1426. void
  1427. csidump(void) {
  1428. int i;
  1429. printf("ESC[");
  1430. for(i = 0; i < csiescseq.len; i++) {
  1431. uint c = csiescseq.buf[i] & 0xff;
  1432. if(isprint(c)) putchar(c);
  1433. else if(c == '\n') printf("(\\n)");
  1434. else if(c == '\r') printf("(\\r)");
  1435. else if(c == 0x1b) printf("(\\e)");
  1436. else printf("(%02x)", c);
  1437. }
  1438. putchar('\n');
  1439. }
  1440. void
  1441. csireset(void) {
  1442. memset(&csiescseq, 0, sizeof(csiescseq));
  1443. }
  1444. void
  1445. strhandle(void) {
  1446. char *p;
  1447. /*
  1448. * TODO: make this being useful in case of color palette change.
  1449. */
  1450. strparse();
  1451. p = strescseq.buf;
  1452. switch(strescseq.type) {
  1453. case ']': /* OSC -- Operating System Command */
  1454. switch(p[0]) {
  1455. case '0':
  1456. case '1':
  1457. case '2':
  1458. /*
  1459. * TODO: Handle special chars in string, like umlauts.
  1460. */
  1461. if(p[1] == ';') {
  1462. XStoreName(xw.dpy, xw.win, strescseq.buf+2);
  1463. }
  1464. break;
  1465. case ';':
  1466. XStoreName(xw.dpy, xw.win, strescseq.buf+1);
  1467. break;
  1468. case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
  1469. break;
  1470. default:
  1471. fprintf(stderr, "erresc: unknown str ");
  1472. strdump();
  1473. break;
  1474. }
  1475. break;
  1476. case 'k': /* old title set compatibility */
  1477. XStoreName(xw.dpy, xw.win, strescseq.buf);
  1478. break;
  1479. case 'P': /* DSC -- Device Control String */
  1480. case '_': /* APC -- Application Program Command */
  1481. case '^': /* PM -- Privacy Message */
  1482. default:
  1483. fprintf(stderr, "erresc: unknown str ");
  1484. strdump();
  1485. /* die(""); */
  1486. break;
  1487. }
  1488. }
  1489. void
  1490. strparse(void) {
  1491. /*
  1492. * TODO: Implement parsing like for CSI when required.
  1493. * Format: ESC type cmd ';' arg0 [';' argn] ESC \
  1494. */
  1495. return;
  1496. }
  1497. void
  1498. strdump(void) {
  1499. int i;
  1500. printf("ESC%c", strescseq.type);
  1501. for(i = 0; i < strescseq.len; i++) {
  1502. uint c = strescseq.buf[i] & 0xff;
  1503. if(isprint(c)) putchar(c);
  1504. else if(c == '\n') printf("(\\n)");
  1505. else if(c == '\r') printf("(\\r)");
  1506. else if(c == 0x1b) printf("(\\e)");
  1507. else printf("(%02x)", c);
  1508. }
  1509. printf("ESC\\\n");
  1510. }
  1511. void
  1512. strreset(void) {
  1513. memset(&strescseq, 0, sizeof(strescseq));
  1514. }
  1515. void
  1516. tputtab(bool forward) {
  1517. uint x = term.c.x;
  1518. if(forward) {
  1519. if(x == term.col)
  1520. return;
  1521. for(++x; x < term.col && !term.tabs[x]; ++x)
  1522. /* nothing */ ;
  1523. } else {
  1524. if(x == 0)
  1525. return;
  1526. for(--x; x > 0 && !term.tabs[x]; --x)
  1527. /* nothing */ ;
  1528. }
  1529. tmoveto(x, term.c.y);
  1530. }
  1531. void
  1532. tputc(char *c, int len) {
  1533. uchar ascii = *c;
  1534. if(iofd != -1)
  1535. write(iofd, c, len);
  1536. switch(ascii) {
  1537. case '\t':
  1538. tputtab(1);
  1539. return;
  1540. case '\b':
  1541. tmoveto(term.c.x-1, term.c.y);
  1542. return;
  1543. case '\r':
  1544. tmoveto(0, term.c.y);
  1545. return;
  1546. case '\f':
  1547. case '\v':
  1548. case '\n':
  1549. /* go to first col if the mode is set */
  1550. tnewline(IS_SET(MODE_CRLF));
  1551. return;
  1552. case '\a':
  1553. if(term.esc & ESC_STR)
  1554. break;
  1555. if(!(xw.state & WIN_FOCUSED))
  1556. xseturgency(1);
  1557. return;
  1558. case '\033':
  1559. csireset();
  1560. term.esc = ESC_START;
  1561. return;
  1562. }
  1563. if(term.esc & ESC_START) {
  1564. if(term.esc & ESC_CSI) {
  1565. csiescseq.buf[csiescseq.len++] = ascii;
  1566. if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
  1567. term.esc = 0;
  1568. csiparse(), csihandle();
  1569. }
  1570. } else if(term.esc & ESC_STR) {
  1571. switch(ascii) {
  1572. case '\033':
  1573. term.esc = ESC_START | ESC_STR_END;
  1574. break;
  1575. case '\a': /* backwards compatibility to xterm */
  1576. term.esc = 0;
  1577. strhandle();
  1578. break;
  1579. default:
  1580. strescseq.buf[strescseq.len++] = ascii;
  1581. if(strescseq.len+1 >= STR_BUF_SIZ) {
  1582. term.esc = 0;
  1583. strhandle();
  1584. }
  1585. }
  1586. } else if(term.esc & ESC_STR_END) {
  1587. term.esc = 0;
  1588. if(ascii == '\\')
  1589. strhandle();
  1590. } else if(term.esc & ESC_ALTCHARSET) {
  1591. switch(ascii) {
  1592. case '0': /* Line drawing set */
  1593. term.c.attr.mode |= ATTR_GFX;
  1594. break;
  1595. case 'B': /* USASCII */
  1596. term.c.attr.mode &= ~ATTR_GFX;
  1597. break;
  1598. case 'A': /* UK (IGNORED) */
  1599. case '<': /* multinational charset (IGNORED) */
  1600. case '5': /* Finnish (IGNORED) */
  1601. case 'C': /* Finnish (IGNORED) */
  1602. case 'K': /* German (IGNORED) */
  1603. break;
  1604. default:
  1605. fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
  1606. }
  1607. term.esc = 0;
  1608. } else {
  1609. switch(ascii) {
  1610. case '[':
  1611. term.esc |= ESC_CSI;
  1612. break;
  1613. case 'P': /* DCS -- Device Control String */
  1614. case '_': /* APC -- Application Program Command */
  1615. case '^': /* PM -- Privacy Message */
  1616. case ']': /* OSC -- Operating System Command */
  1617. case 'k': /* old title set compatibility */
  1618. strreset();
  1619. strescseq.type = ascii;
  1620. term.esc |= ESC_STR;
  1621. break;
  1622. case '(': /* set primary charset G0 */
  1623. term.esc |= ESC_ALTCHARSET;
  1624. break;
  1625. case ')': /* set secondary charset G1 (IGNORED) */
  1626. case '*': /* set tertiary charset G2 (IGNORED) */
  1627. case '+': /* set quaternary charset G3 (IGNORED) */
  1628. term.esc = 0;
  1629. break;
  1630. case 'D': /* IND -- Linefeed */
  1631. if(term.c.y == term.bot)
  1632. tscrollup(term.top, 1);
  1633. else
  1634. tmoveto(term.c.x, term.c.y+1);
  1635. term.esc = 0;
  1636. break;
  1637. case 'E': /* NEL -- Next line */
  1638. tnewline(1); /* always go to first col */
  1639. term.esc = 0;
  1640. break;
  1641. case 'H': /* HTS -- Horizontal tab stop */
  1642. term.tabs[term.c.x] = 1;
  1643. term.esc = 0;
  1644. break;
  1645. case 'M': /* RI -- Reverse index */
  1646. if(term.c.y == term.top)
  1647. tscrolldown(term.top, 1);
  1648. else
  1649. tmoveto(term.c.x, term.c.y-1);
  1650. term.esc = 0;
  1651. break;
  1652. case 'c': /* RIS -- Reset to inital state */
  1653. treset();
  1654. term.esc = 0;
  1655. xclearborders();
  1656. xresettitle();
  1657. break;
  1658. case '=': /* DECPAM -- Application keypad */
  1659. term.mode |= MODE_APPKEYPAD;
  1660. term.esc = 0;
  1661. break;
  1662. case '>': /* DECPNM -- Normal keypad */
  1663. term.mode &= ~MODE_APPKEYPAD;
  1664. term.esc = 0;
  1665. break;
  1666. case '7': /* DECSC -- Save Cursor */
  1667. tcursor(CURSOR_SAVE);
  1668. term.esc = 0;
  1669. break;
  1670. case '8': /* DECRC -- Restore Cursor */
  1671. tcursor(CURSOR_LOAD);
  1672. term.esc = 0;
  1673. break;
  1674. case '\\': /* ST -- Stop */
  1675. term.esc = 0;
  1676. break;
  1677. default:
  1678. fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
  1679. (uchar) ascii, isprint(ascii)?ascii:'.');
  1680. term.esc = 0;
  1681. }
  1682. }
  1683. } else {
  1684. if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
  1685. sel.bx = -1;
  1686. if(ascii >= '\020' || term.c.attr.mode & ATTR_GFX) {
  1687. if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
  1688. tnewline(1); /* always go to first col */
  1689. tsetchar(c);
  1690. if(term.c.x+1 < term.col)
  1691. tmoveto(term.c.x+1, term.c.y);
  1692. else
  1693. term.c.state |= CURSOR_WRAPNEXT;
  1694. }
  1695. }
  1696. }
  1697. int
  1698. tresize(int col, int row) {
  1699. int i, x;
  1700. int minrow = MIN(row, term.row);
  1701. int mincol = MIN(col, term.col);
  1702. int slide = term.c.y - row + 1;
  1703. if(col < 1 || row < 1)
  1704. return 0;
  1705. /* free unneeded rows */
  1706. i = 0;
  1707. if(slide > 0) {
  1708. /* slide screen to keep cursor where we expect it -
  1709. * tscrollup would work here, but we can optimize to
  1710. * memmove because we're freeing the earlier lines */
  1711. for(/* i = 0 */; i < slide; i++) {
  1712. free(term.line[i]);
  1713. free(term.alt[i]);
  1714. }
  1715. memmove(term.line, term.line + slide, row * sizeof(Line));
  1716. memmove(term.alt, term.alt + slide, row * sizeof(Line));
  1717. }
  1718. for(i += row; i < term.row; i++) {
  1719. free(term.line[i]);
  1720. free(term.alt[i]);
  1721. }
  1722. /* resize to new height */
  1723. term.line = xrealloc(term.line, row * sizeof(Line));
  1724. term.alt = xrealloc(term.alt, row * sizeof(Line));
  1725. term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
  1726. term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
  1727. /* resize each row to new width, zero-pad if needed */
  1728. for(i = 0; i < minrow; i++) {
  1729. term.dirty[i] = 1;
  1730. term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
  1731. term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
  1732. for(x = mincol; x < col; x++) {
  1733. term.line[i][x].state = 0;
  1734. term.alt[i][x].state = 0;
  1735. }
  1736. }
  1737. /* allocate any new rows */
  1738. for(/* i == minrow */; i < row; i++) {
  1739. term.dirty[i] = 1;
  1740. term.line[i] = xcalloc(col, sizeof(Glyph));
  1741. term.alt [i] = xcalloc(col, sizeof(Glyph));
  1742. }
  1743. if(col > term.col) {
  1744. bool *bp = term.tabs + term.col;
  1745. memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
  1746. while(--bp > term.tabs && !*bp)
  1747. /* nothing */ ;
  1748. for(bp += TAB; bp < term.tabs + col; bp += TAB)
  1749. *bp = 1;
  1750. }
  1751. /* update terminal size */
  1752. term.col = col, term.row = row;
  1753. /* make use of the LIMIT in tmoveto */
  1754. tmoveto(term.c.x, term.c.y);
  1755. /* reset scrolling region */
  1756. tsetscroll(0, row-1);
  1757. return (slide > 0);
  1758. }
  1759. void
  1760. xresize(int col, int row) {
  1761. xw.tw = MAX(1, 2*BORDER + col * xw.cw);
  1762. xw.th = MAX(1, 2*BORDER + row * xw.ch);
  1763. XftDrawChange(xw.xft_draw, xw.buf);
  1764. }
  1765. void
  1766. xloadcols(void) {
  1767. int i, r, g, b;
  1768. XRenderColor xft_color = { .alpha = 0 };
  1769. /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
  1770. for(i = 0; i < LEN(colorname); i++) {
  1771. if(!colorname[i])
  1772. continue;
  1773. if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.xft_col[i])) {
  1774. die("Could not allocate color '%s'\n", colorname[i]);
  1775. }
  1776. }
  1777. /* load colors [16-255] ; same colors as xterm */
  1778. for(i = 16, r = 0; r < 6; r++)
  1779. for(g = 0; g < 6; g++)
  1780. for(b = 0; b < 6; b++) {
  1781. xft_color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
  1782. xft_color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
  1783. xft_color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
  1784. if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
  1785. die("Could not allocate color %d\n", i);
  1786. }
  1787. i++;
  1788. }
  1789. for(r = 0; r < 24; r++, i++) {
  1790. xft_color.red = xft_color.green = xft_color.blue = 0x0808 + 0x0a0a * r;
  1791. if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &xft_color, &dc.xft_col[i])) {
  1792. dc.xft_col[i] = dc.xft_col[256];
  1793. fprintf(stderr, "Could not allocate color %d\n", i);
  1794. }
  1795. }
  1796. }
  1797. void
  1798. xtermclear(int col1, int row1, int col2, int row2) {
  1799. XftDrawRect(xw.xft_draw,
  1800. &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
  1801. BORDER + col1 * xw.cw,
  1802. BORDER + row1 * xw.ch,
  1803. (col2-col1+1) * xw.cw,
  1804. (row2-row1+1) * xw.ch);
  1805. }
  1806. /*
  1807. * Absolute coordinates.
  1808. */
  1809. void
  1810. xclear(int x1, int y1, int x2, int y2) {
  1811. XftDrawRect(xw.xft_draw,
  1812. &dc.xft_col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG],
  1813. x1, y1, x2-x1, y2-y1);
  1814. }
  1815. void
  1816. xclearborders(void) {
  1817. /* top and left border */
  1818. xclear(0, 0, BORDER, xw.h);
  1819. xclear(0, 0, xw.w, BORDER);
  1820. /* lower and right border */
  1821. xclear(BORDER, xw.th - 1, xw.w, xw.h);
  1822. /* Will just draw what hasn't been drawn by the previous call. */
  1823. xclear(xw.tw - 1, BORDER, xw.w, xw.h - xw.th - 2);
  1824. }
  1825. void
  1826. xhints(void) {
  1827. XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
  1828. XWMHints wm = {.flags = InputHint, .input = 1};
  1829. XSizeHints *sizeh = NULL;
  1830. sizeh = XAllocSizeHints();
  1831. if(xw.isfixed == False) {
  1832. sizeh->flags = PSize | PResizeInc | PBaseSize;
  1833. sizeh->height = xw.h;
  1834. sizeh->width = xw.w;
  1835. sizeh->height_inc = xw.ch;
  1836. sizeh->width_inc = xw.cw;
  1837. sizeh->base_height = 2*BORDER;
  1838. sizeh->base_width = 2*BORDER;
  1839. } else {
  1840. sizeh->flags = PMaxSize | PMinSize;
  1841. sizeh->min_width = sizeh->max_width = xw.fw;
  1842. sizeh->min_height = sizeh->max_height = xw.fh;
  1843. }
  1844. XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
  1845. XFree(sizeh);
  1846. }
  1847. void
  1848. xinitfont(Font *f, char *fontstr) {
  1849. f->xft_set = XftFontOpenName(xw.dpy, xw.scr, fontstr);
  1850. if(!f->xft_set)
  1851. die("st: can't open font %s.\n", fontstr);
  1852. f->ascent = f->xft_set->ascent;
  1853. f->descent = f->xft_set->descent;
  1854. f->lbearing = 0;
  1855. f->rbearing = f->xft_set->max_advance_width;
  1856. }
  1857. void
  1858. initfonts(char *fontstr) {
  1859. char *fstr;
  1860. xinitfont(&dc.font, fontstr);
  1861. fstr = smstrcat(fontstr, ":weight=bold", NULL);
  1862. xinitfont(&dc.bfont, fstr);
  1863. free(fstr);
  1864. fstr = smstrcat(fontstr, ":slant=italic,oblique", NULL);
  1865. xinitfont(&dc.ifont, fstr);
  1866. free(fstr);
  1867. fstr = smstrcat(fontstr, ":weight=bold:slant=italic,oblique", NULL);
  1868. xinitfont(&dc.ibfont, fstr);
  1869. free(fstr);
  1870. }
  1871. void
  1872. xinit(void) {
  1873. XSetWindowAttributes attrs;
  1874. Cursor cursor;
  1875. Window parent;
  1876. int sw, sh, major, minor;
  1877. if(!(xw.dpy = XOpenDisplay(NULL)))
  1878. die("Can't open display\n");
  1879. xw.scr = XDefaultScreen(xw.dpy);
  1880. xw.vis = XDefaultVisual(xw.dpy, xw.scr);
  1881. /* font */
  1882. initfonts(FONT);
  1883. /* XXX: Assuming same size for bold font */
  1884. xw.cw = dc.font.rbearing - dc.font.lbearing;
  1885. xw.ch = dc.font.ascent + dc.font.descent;
  1886. /* colors */
  1887. xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
  1888. xloadcols();
  1889. /* adjust fixed window geometry */
  1890. if(xw.isfixed) {
  1891. sw = DisplayWidth(xw.dpy, xw.scr);
  1892. sh = DisplayHeight(xw.dpy, xw.scr);
  1893. if(xw.fx < 0)
  1894. xw.fx = sw + xw.fx - xw.fw - 1;
  1895. if(xw.fy < 0)
  1896. xw.fy = sh + xw.fy - xw.fh - 1;
  1897. xw.h = xw.fh;
  1898. xw.w = xw.fw;
  1899. } else {
  1900. /* window - default size */
  1901. xw.h = 2*BORDER + term.row * xw.ch;
  1902. xw.w = 2*BORDER + term.col * xw.cw;
  1903. xw.fx = 0;
  1904. xw.fy = 0;
  1905. }
  1906. attrs.background_pixel = dc.xft_col[DefaultBG].pixel;
  1907. attrs.border_pixel = dc.xft_col[DefaultBG].pixel;
  1908. attrs.bit_gravity = NorthWestGravity;
  1909. attrs.event_mask = FocusChangeMask | KeyPressMask
  1910. | ExposureMask | VisibilityChangeMask | StructureNotifyMask
  1911. | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
  1912. attrs.colormap = xw.cmap;
  1913. parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
  1914. xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
  1915. xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
  1916. xw.vis,
  1917. CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
  1918. | CWColormap,
  1919. &attrs);
  1920. /* double buffering */
  1921. if(!XdbeQueryExtension(xw.dpy, &major, &minor))
  1922. die("Xdbe extension is not present\n");
  1923. xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
  1924. /* Xft rendering context */
  1925. xw.xft_draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
  1926. /* input methods */
  1927. xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
  1928. xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
  1929. | XIMStatusNothing, XNClientWindow, xw.win,
  1930. XNFocusWindow, xw.win, NULL);
  1931. /* gc */
  1932. dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
  1933. /* white cursor, black outline */
  1934. cursor = XCreateFontCursor(xw.dpy, XC_xterm);
  1935. XDefineCursor(xw.dpy, xw.win, cursor);
  1936. XRecolorCursor(xw.dpy, cursor,
  1937. &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
  1938. &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
  1939. xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
  1940. xresettitle();
  1941. XMapWindow(xw.dpy, xw.win);
  1942. xhints();
  1943. XSync(xw.dpy, 0);
  1944. }
  1945. void
  1946. xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
  1947. int fg = base.fg, bg = base.bg, temp;
  1948. int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
  1949. Font *font = &dc.font;
  1950. XGlyphInfo extents;
  1951. /* only switch default fg/bg if term is in RV mode */
  1952. if(IS_SET(MODE_REVERSE)) {
  1953. if(fg == DefaultFG)
  1954. fg = DefaultBG;
  1955. if(bg == DefaultBG)
  1956. bg = DefaultFG;
  1957. }
  1958. if(base.mode & ATTR_REVERSE)
  1959. temp = fg, fg = bg, bg = temp;
  1960. if(base.mode & ATTR_BOLD) {
  1961. fg += 8;
  1962. font = &dc.bfont;
  1963. }
  1964. if(base.mode & ATTR_ITALIC)
  1965. font = &dc.ifont;
  1966. if(base.mode & (ATTR_ITALIC|ATTR_ITALIC))
  1967. font = &dc.ibfont;
  1968. XftTextExtentsUtf8(xw.dpy, font->xft_set, (FcChar8 *)s, bytelen, &extents);
  1969. width = extents.xOff;
  1970. XftDrawRect(xw.xft_draw, &dc.xft_col[bg], winx, winy - font->ascent, width, xw.ch);
  1971. XftDrawStringUtf8(xw.xft_draw, &dc.xft_col[fg], font->xft_set, winx, winy, (FcChar8 *)s, bytelen);
  1972. if(base.mode & ATTR_UNDERLINE) {
  1973. XftDrawRect(xw.xft_draw, &dc.xft_col[fg], winx, winy+1,
  1974. width, 1);
  1975. }
  1976. }
  1977. void
  1978. xdrawcursor(void) {
  1979. static int oldx = 0;
  1980. static int oldy = 0;
  1981. int sl;
  1982. Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
  1983. LIMIT(oldx, 0, term.col-1);
  1984. LIMIT(oldy, 0, term.row-1);
  1985. if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
  1986. memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
  1987. /* remove the old cursor */
  1988. if(term.line[oldy][oldx].state & GLYPH_SET) {
  1989. sl = utf8size(term.line[oldy][oldx].c);
  1990. xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
  1991. } else
  1992. xtermclear(oldx, oldy, oldx, oldy);
  1993. /* draw the new one */
  1994. if(!(term.c.state & CURSOR_HIDE)) {
  1995. if(!(xw.state & WIN_FOCUSED))
  1996. g.bg = DefaultUCS;
  1997. if(IS_SET(MODE_REVERSE))
  1998. g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
  1999. sl = utf8size(g.c);
  2000. xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
  2001. oldx = term.c.x, oldy = term.c.y;
  2002. }
  2003. }
  2004. void
  2005. xresettitle(void) {
  2006. XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
  2007. }
  2008. void
  2009. redraw(void) {
  2010. struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
  2011. xclearborders();
  2012. tfulldirt();
  2013. draw();
  2014. XSync(xw.dpy, False); /* necessary for a good tput flash */
  2015. nanosleep(&tv, NULL);
  2016. }
  2017. void
  2018. draw(void) {
  2019. XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
  2020. drawregion(0, 0, term.col, term.row);
  2021. XdbeSwapBuffers(xw.dpy, swpinfo, 1);
  2022. }
  2023. void
  2024. drawregion(int x1, int y1, int x2, int y2) {
  2025. int ic, ib, x, y, ox, sl;
  2026. Glyph base, new;
  2027. char buf[DRAW_BUF_SIZ];
  2028. bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
  2029. if((sel.alt && !alt) || (!sel.alt && alt))
  2030. ena_sel = 0;
  2031. if(!(xw.state & WIN_VISIBLE))
  2032. return;
  2033. for(y = y1; y < y2; y++) {
  2034. if(!term.dirty[y])
  2035. continue;
  2036. xtermclear(0, y, term.col, y);
  2037. term.dirty[y] = 0;
  2038. base = term.line[y][0];
  2039. ic = ib = ox = 0;
  2040. for(x = x1; x < x2; x++) {
  2041. new = term.line[y][x];
  2042. if(ena_sel && *(new.c) && selected(x, y))
  2043. new.mode ^= ATTR_REVERSE;
  2044. if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
  2045. ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
  2046. xdraws(buf, base, ox, y, ic, ib);
  2047. ic = ib = 0;
  2048. }
  2049. if(new.state & GLYPH_SET) {
  2050. if(ib == 0) {
  2051. ox = x;
  2052. base = new;
  2053. }
  2054. sl = utf8size(new.c);
  2055. memcpy(buf+ib, new.c, sl);
  2056. ib += sl;
  2057. ++ic;
  2058. }
  2059. }
  2060. if(ib > 0)
  2061. xdraws(buf, base, ox, y, ic, ib);
  2062. }
  2063. xdrawcursor();
  2064. }
  2065. void
  2066. expose(XEvent *ev) {
  2067. XExposeEvent *e = &ev->xexpose;
  2068. if(xw.state & WIN_REDRAW) {
  2069. if(!e->count)
  2070. xw.state &= ~WIN_REDRAW;
  2071. }
  2072. }
  2073. void
  2074. visibility(XEvent *ev) {
  2075. XVisibilityEvent *e = &ev->xvisibility;
  2076. if(e->state == VisibilityFullyObscured)
  2077. xw.state &= ~WIN_VISIBLE;
  2078. else if(!(xw.state & WIN_VISIBLE))
  2079. /* need a full redraw for next Expose, not just a buf copy */
  2080. xw.state |= WIN_VISIBLE | WIN_REDRAW;
  2081. }
  2082. void
  2083. unmap(XEvent *ev) {
  2084. xw.state &= ~WIN_VISIBLE;
  2085. }
  2086. void
  2087. xseturgency(int add) {
  2088. XWMHints *h = XGetWMHints(xw.dpy, xw.win);
  2089. h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
  2090. XSetWMHints(xw.dpy, xw.win, h);
  2091. XFree(h);
  2092. }
  2093. void
  2094. focus(XEvent *ev) {
  2095. if(ev->type == FocusIn) {
  2096. xw.state |= WIN_FOCUSED;
  2097. xseturgency(0);
  2098. } else
  2099. xw.state &= ~WIN_FOCUSED;
  2100. }
  2101. char*
  2102. kmap(KeySym k, uint state) {
  2103. int i;
  2104. state &= ~Mod2Mask;
  2105. for(i = 0; i < LEN(key); i++) {
  2106. uint mask = key[i].mask;
  2107. if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
  2108. return (char*)key[i].s;
  2109. }
  2110. return NULL;
  2111. }
  2112. void
  2113. kpress(XEvent *ev) {
  2114. XKeyEvent *e = &ev->xkey;
  2115. KeySym ksym;
  2116. char buf[32];
  2117. char *customkey;
  2118. int len;
  2119. int meta;
  2120. int shift;
  2121. Status status;
  2122. if (IS_SET(MODE_KBDLOCK))
  2123. return;
  2124. meta = e->state & Mod1Mask;
  2125. shift = e->state & ShiftMask;
  2126. len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
  2127. /* 1. custom keys from config.h */
  2128. if((customkey = kmap(ksym, e->state)))
  2129. ttywrite(customkey, strlen(customkey));
  2130. /* 2. hardcoded (overrides X lookup) */
  2131. else
  2132. switch(ksym) {
  2133. case XK_Up:
  2134. case XK_Down:
  2135. case XK_Left:
  2136. case XK_Right:
  2137. /* XXX: shift up/down doesn't work */
  2138. sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
  2139. ttywrite(buf, 3);
  2140. break;
  2141. case XK_Insert:
  2142. if(shift)
  2143. selpaste();
  2144. break;
  2145. case XK_Return:
  2146. if(IS_SET(MODE_CRLF))
  2147. ttywrite("\r\n", 2);
  2148. else
  2149. ttywrite("\r", 1);
  2150. break;
  2151. /* 3. X lookup */
  2152. default:
  2153. if(len > 0) {
  2154. if(meta && len == 1)
  2155. ttywrite("\033", 1);
  2156. ttywrite(buf, len);
  2157. }
  2158. break;
  2159. }
  2160. }
  2161. void
  2162. cmessage(XEvent *e) {
  2163. /* See xembed specs
  2164. http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
  2165. if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
  2166. if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
  2167. xw.state |= WIN_FOCUSED;
  2168. xseturgency(0);
  2169. } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
  2170. xw.state &= ~WIN_FOCUSED;
  2171. }
  2172. }
  2173. }
  2174. void
  2175. resize(XEvent *e) {
  2176. int col, row;
  2177. if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
  2178. return;
  2179. xw.w = e->xconfigure.width;
  2180. xw.h = e->xconfigure.height;
  2181. col = (xw.w - 2*BORDER) / xw.cw;
  2182. row = (xw.h - 2*BORDER) / xw.ch;
  2183. if(col == term.col && row == term.row)
  2184. return;
  2185. tresize(col, row);
  2186. xresize(col, row);
  2187. xclearborders();
  2188. ttyresize();
  2189. }
  2190. void
  2191. run(void) {
  2192. XEvent ev;
  2193. fd_set rfd;
  2194. int xfd = XConnectionNumber(xw.dpy), i;
  2195. struct timeval drawtimeout, *tv = NULL;
  2196. for(i = 0;; i++) {
  2197. FD_ZERO(&rfd);
  2198. FD_SET(cmdfd, &rfd);
  2199. FD_SET(xfd, &rfd);
  2200. if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
  2201. if(errno == EINTR)
  2202. continue;
  2203. die("select failed: %s\n", SERRNO);
  2204. }
  2205. /*
  2206. * Stop after a certain number of reads so the user does not
  2207. * feel like the system is stuttering.
  2208. */
  2209. if(i < 1000 && FD_ISSET(cmdfd, &rfd)) {
  2210. ttyread();
  2211. /*
  2212. * Just wait a bit so it isn't disturbing the
  2213. * user and the system is able to write something.
  2214. */
  2215. drawtimeout.tv_sec = 0;
  2216. drawtimeout.tv_usec = 5;
  2217. tv = &drawtimeout;
  2218. continue;
  2219. }
  2220. i = 0;
  2221. tv = NULL;
  2222. while(XPending(xw.dpy)) {
  2223. XNextEvent(xw.dpy, &ev);
  2224. if(XFilterEvent(&ev, xw.win))
  2225. continue;
  2226. if(handler[ev.type])
  2227. (handler[ev.type])(&ev);
  2228. }
  2229. draw();
  2230. XFlush(xw.dpy);
  2231. }
  2232. }
  2233. int
  2234. main(int argc, char *argv[]) {
  2235. int i, bitm, xr, yr;
  2236. uint wr, hr;
  2237. xw.fw = xw.fh = xw.fx = xw.fy = 0;
  2238. xw.isfixed = False;
  2239. for(i = 1; i < argc; i++) {
  2240. switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
  2241. case 't':
  2242. if(++i < argc) opt_title = argv[i];
  2243. break;
  2244. case 'c':
  2245. if(++i < argc) opt_class = argv[i];
  2246. break;
  2247. case 'w':
  2248. if(++i < argc) opt_embed = argv[i];
  2249. break;
  2250. case 'f':
  2251. if(++i < argc) opt_io = argv[i];
  2252. break;
  2253. case 'e':
  2254. /* eat every remaining arguments */
  2255. if(++i < argc) opt_cmd = &argv[i];
  2256. goto run;
  2257. case 'g':
  2258. if(++i >= argc)
  2259. break;
  2260. bitm = XParseGeometry(argv[i], &xr, &yr, &wr, &hr);
  2261. if(bitm & XValue)
  2262. xw.fx = xr;
  2263. if(bitm & YValue)
  2264. xw.fy = yr;
  2265. if(bitm & WidthValue)
  2266. xw.fw = (int)wr;
  2267. if(bitm & HeightValue)
  2268. xw.fh = (int)hr;
  2269. if(bitm & XNegative && xw.fx == 0)
  2270. xw.fx = -1;
  2271. if(bitm & XNegative && xw.fy == 0)
  2272. xw.fy = -1;
  2273. if(xw.fh != 0 && xw.fw != 0)
  2274. xw.isfixed = True;
  2275. break;
  2276. case 'v':
  2277. default:
  2278. die(USAGE);
  2279. }
  2280. }
  2281. run:
  2282. setlocale(LC_CTYPE, "");
  2283. tnew(80, 24);
  2284. ttynew();
  2285. xinit();
  2286. selinit();
  2287. run();
  2288. return 0;
  2289. }