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