8 static unsigned long *text; /* buffer of text on terminal screen */
9 static unsigned long *scrtop; /* top of working screen */
10 static unsigned long *disptop; /* top of displayed screen */
11 static unsigned long *sbtop; /* top of scrollback */
12 static unsigned long *cpos; /* cursor position (convenience) */
13 static unsigned long *disptext; /* buffer of text on real screen */
14 static unsigned long *wanttext; /* buffer of text we want on screen */
15 static unsigned long *alttext; /* buffer of text on alt. screen */
17 static unsigned char *selspace; /* buffer for building selections in */
19 #define TSIZE (sizeof(*text))
20 #define fix_cpos do { cpos = scrtop + curs_y * (cols+1) + curs_x; } while(0)
22 static unsigned long curr_attr, save_attr;
24 static int curs_x, curs_y; /* cursor */
25 static int save_x, save_y; /* saved cursor position */
26 static int marg_t, marg_b; /* scroll margins */
27 static int dec_om; /* DEC origin mode flag */
28 static int wrap, wrapnext; /* wrap flags */
29 static int insert; /* insert-mode flag */
30 static int cset; /* 0 or 1: which char set */
31 static int save_cset, save_csattr; /* saved with cursor position */
32 static int rvideo; /* global reverse video flag */
34 static unsigned long cset_attr[2];
37 * Saved settings on the alternate screen.
39 static int alt_x, alt_y, alt_om, alt_wrap, alt_wnext, alt_ins, alt_cset;
40 static int alt_t, alt_b;
43 #define ARGS_MAX 32 /* max # of esc sequence arguments */
44 #define ARG_DEFAULT -1 /* if an arg isn't specified */
45 #define def(a,d) ( (a) == ARG_DEFAULT ? (d) : (a) )
46 static int esc_args[ARGS_MAX];
49 #define ANSI(x,y) ((x)+((y)<<8))
50 #define ANSI_QUE(x) ANSI(x,TRUE)
52 #define OSC_STR_MAX 2048
53 static int osc_strlen;
54 static char osc_string[OSC_STR_MAX+1];
57 static unsigned char *tabs;
62 static int scroll_heuristic;
76 OSC_STRING, OSC_MAYBE_ST,
81 NO_SELECTION, ABOUT_TO, DRAGGING, SELECTED
84 SM_CHAR, SM_WORD, SM_LINE
86 static unsigned long *selstart, *selend, *selanchor;
88 static short wordness[256] = {
89 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 01 */
90 0,1,2,1,1,1,1,1,1,1,1,1,1,2,2,2, 2,2,2,2,2,2,2,2,2,2,1,1,1,1,1,1, /* 23 */
91 1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,1,1,1,1,2, /* 45 */
92 1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,1,1,1,1,1, /* 67 */
93 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 89 */
94 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* AB */
95 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,1,2,2,2,2,2,2,2,2, /* CD */
96 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,1,2,2,2,2,2,2,2,2, /* EF */
99 static unsigned char sel_nl[] = SEL_NL;
102 * Internal prototypes.
104 static void do_paint (Context, int);
105 static void erase_lots (int, int, int);
106 static void swap_screen (int);
107 static void update_sbar (void);
108 static void deselect (void);
111 * Set up power-on settings for the terminal.
113 static void power_on(void) {
114 curs_x = curs_y = alt_x = alt_y = save_x = save_y = 0;
117 alt_b = marg_b = rows - 1;
122 for (i = 0; i < cols; i++)
123 tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
125 alt_om = dec_om = cfg.dec_om;
126 alt_wnext = wrapnext = alt_ins = insert = FALSE;
127 alt_wrap = wrap = cfg.wrap_mode;
129 cset_attr[0] = cset_attr[1] = ATTR_ASCII;
131 save_attr = curr_attr = ATTR_DEFAULT;
132 app_cursor_keys = cfg.app_cursor;
133 app_keypad_keys = cfg.app_keypad;
137 for (i = 0; i < 256; i++)
138 wordness[i] = cfg.wordness[i];
142 erase_lots (FALSE, TRUE, TRUE);
144 erase_lots (FALSE, TRUE, TRUE);
149 * Force a screen update.
151 void term_update(void) {
155 if ( (seen_key_event && (unscroll_event & US_KEY)) ||
156 (seen_disp_event && (unscroll_event & US_DISP)) ) {
158 seen_disp_event = seen_key_event = 0;
160 do_paint (ctx, TRUE);
163 scroll_heuristic = 0;
168 * Same as power_on(), but an external function.
170 void term_pwron(void) {
179 * Clear the scrollback.
181 void term_clrsb(void) {
182 disptop = sbtop = scrtop;
187 * Initialise the terminal.
189 void term_init(void) {
190 text = sbtop = scrtop = disptop = cpos = NULL;
191 disptext = wanttext = NULL;
201 * Set up the terminal for a given size.
203 void term_size(int newrows, int newcols, int newsavelines) {
204 unsigned long *newtext, *newdisp, *newwant, *newalt;
205 int i, j, crows, ccols;
207 int save_alt_which = alt_which;
209 if (newrows == rows && newcols == cols && newsavelines == savelines)
210 return; /* nothing to do */
216 alt_b = marg_b = newrows - 1;
218 newtext = smalloc ((newrows+newsavelines)*(newcols+1)*TSIZE);
219 disptop = newtext + newsavelines*(newcols+1);
220 for (i=0; i<(newrows+newsavelines)*(newcols+1); i++)
221 newtext[i] = ERASE_CHAR;
223 crows = rows + (scrtop - sbtop) / (cols+1);
224 if (crows > newrows+newsavelines)
225 crows = newrows+newsavelines;
226 ccols = (cols < newcols ? cols : newcols);
227 for (i=0; i<crows; i++) {
228 int oldidx = (rows + savelines - crows + i) * (cols+1);
229 int newidx = (newrows + newsavelines - crows + i) * (newcols+1);
230 for (j=0; j<ccols; j++)
231 newtext[newidx+j] = text[oldidx+j];
232 newtext[newidx+newcols] =
233 (cols == newcols ? text[oldidx+cols] : 0);
235 sbtop = disptop - (crows - newrows) * (newcols+1);
244 newdisp = smalloc (newrows*(newcols+1)*TSIZE);
245 for (i=0; i<newrows*(newcols+1); i++)
246 newdisp[i] = ATTR_INVALID;
250 newwant = smalloc (newrows*(newcols+1)*TSIZE);
251 for (i=0; i<newrows*(newcols+1); i++)
252 newwant[i] = ATTR_INVALID;
256 newalt = smalloc (newrows*(newcols+1)*TSIZE);
257 for (i=0; i<newrows*(newcols+1); i++)
258 newalt[i] = ERASE_CHAR;
263 selspace = smalloc ( (newrows+newsavelines) * (newcols+sizeof(sel_nl)) );
265 tabs = srealloc (tabs, newcols*sizeof(*tabs));
268 for (i = (cols > 0 ? cols : 0); i < newcols; i++)
269 tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
273 curs_y += newrows - rows;
276 if (curs_y >= newrows)
278 if (curs_x >= newcols)
281 wrapnext = alt_wnext = FALSE;
285 savelines = newsavelines;
288 swap_screen(save_alt_which);
297 static void swap_screen (int which) {
301 if (which == alt_which)
306 for (t=0; t<rows*(cols+1); t++) {
307 tt = scrtop[t]; scrtop[t] = alttext[t]; alttext[t] = tt;
310 t = curs_x; curs_x = alt_x; alt_x = t;
311 t = curs_y; curs_y = alt_y; alt_y = t;
312 t = marg_t; marg_t = alt_t; alt_t = t;
313 t = marg_b; marg_b = alt_b; alt_b = t;
314 t = dec_om; dec_om = alt_om; alt_om = t;
315 t = wrap; wrap = alt_wrap; alt_wrap = t;
316 t = wrapnext; wrapnext = alt_wnext; alt_wnext = t;
317 t = insert; insert = alt_ins; alt_ins = t;
318 t = cset; cset = alt_cset; alt_cset = t;
324 * Retrieve a character from `inbuf'.
326 static int inbuf_getc(void) {
327 if (inbuf_head == inbuf_reap)
331 inbuf_reap = (inbuf_reap+1) & INBUF_MASK;
337 * Update the scroll bar.
339 static void update_sbar(void) {
342 min = (sbtop - text) / (cols+1);
343 set_sbar ((scrtop - text) / (cols+1) + rows - min,
344 (disptop - text) / (cols+1) - min,
349 * Check whether the region bounded by the two pointers intersects
350 * the scroll region, and de-select the on-screen selection if so.
352 static void check_selection (unsigned long *from, unsigned long *to) {
353 if (from < selend && selstart < to)
358 * Scroll the screen. (`lines' is +ve for scrolling forward, -ve
359 * for backward.) `sb' is TRUE if the scrolling is permitted to
360 * affect the scrollback buffer.
362 static void scroll (int topline, int botline, int lines, int sb) {
363 unsigned long *scroll_top;
364 int scroll_size, size, i;
366 scroll_top = scrtop + topline*(cols+1);
367 size = (lines < 0 ? -lines : lines) * (cols+1);
368 scroll_size = (botline - topline + 1) * (cols+1) - size;
370 if (lines > 0 && topline == 0 && alt_which == 0 && sb) {
372 * Since we're going to scroll the top line and we're on the
373 * scrolling screen let's also affect the scrollback buffer.
375 sbtop -= lines * (cols+1);
378 scroll_size += scroll_top - sbtop;
383 if (scroll_size < 0) {
390 memmove (scroll_top, scroll_top + size, scroll_size*TSIZE);
391 for (i = 0; i < size; i++)
392 scroll_top[i+scroll_size] = ERASE_CHAR;
393 if (selstart > scroll_top &&
394 selstart < scroll_top + size + scroll_size) {
396 if (selstart < scroll_top)
397 selstart = scroll_top;
399 if (selend > scroll_top &&
400 selend < scroll_top + size + scroll_size) {
402 if (selend < scroll_top)
407 memmove (scroll_top + size, scroll_top, scroll_size*TSIZE);
408 for (i = 0; i < size; i++)
409 scroll_top[i] = ERASE_CHAR;
410 if (selstart > scroll_top &&
411 selstart < scroll_top + size + scroll_size) {
413 if (selstart > scroll_top + size + scroll_size)
414 selstart = scroll_top + size + scroll_size;
416 if (selend > scroll_top &&
417 selend < scroll_top + size + scroll_size) {
419 if (selend > scroll_top + size + scroll_size)
420 selend = scroll_top + size + scroll_size;
424 scroll_heuristic += lines;
428 * Move the cursor to a given position, clipping at boundaries. We
429 * may or may not want to clip at the scroll margin: marg_clip is 0
430 * not to, 1 to disallow _passing_ the margins, and 2 to disallow
431 * even _being_ outside the margins.
433 static void move (int x, int y, int marg_clip) {
439 if ((curs_y >= marg_t || marg_clip == 2) && y < marg_t)
441 if ((curs_y <= marg_b || marg_clip == 2) && y > marg_b)
455 * Save or restore the cursor and SGR mode.
457 static void save_cursor(int save) {
461 save_attr = curr_attr;
463 save_csattr = cset_attr[cset];
467 curr_attr = save_attr;
469 cset_attr[cset] = save_csattr;
475 * Erase a large portion of the screen: the whole screen, or the
476 * whole line, or parts thereof.
478 static void erase_lots (int line_only, int from_begin, int to_end) {
479 unsigned long *startpos, *endpos;
482 startpos = cpos - curs_x;
483 endpos = startpos + cols+1;
486 endpos = startpos + rows * (cols+1);
492 check_selection (startpos, endpos);
493 while (startpos < endpos)
494 *startpos++ = ERASE_CHAR;
498 * Insert or delete characters within the current line. n is +ve if
499 * insertion is desired, and -ve for deletion.
501 static void insch (int n) {
502 int dir = (n < 0 ? -1 : +1);
505 n = (n < 0 ? -n : n);
506 if (n > cols - curs_x)
508 m = cols - curs_x - n;
509 check_selection (cpos, cpos+n);
511 memmove (cpos, cpos+n, m*TSIZE);
513 cpos[m++] = ERASE_CHAR;
515 memmove (cpos+n, cpos, m*TSIZE);
517 cpos[n] = ERASE_CHAR;
522 * Toggle terminal mode `mode' to state `state'. (`query' indicates
523 * whether the mode is a DEC private one or a normal one.)
525 static void toggle_mode (int mode, int query, int state) {
526 if (query) switch (mode) {
527 case 1: /* application cursor keys */
528 app_cursor_keys = state;
530 case 3: /* 80/132 columns */
532 request_resize (state ? 132 : 80, rows);
534 case 5: /* reverse video */
536 seen_disp_event = TRUE;
538 case 6: /* DEC origin mode */
541 case 7: /* auto wrap */
544 case 47: /* alternate screen */
549 } else switch (mode) {
550 case 4: /* set insert mode */
557 * Process an OSC sequence: set window title or icon name.
559 static void do_osc(void) {
562 wordness[(unsigned char)osc_string[osc_strlen]] = esc_args[0];
564 osc_string[osc_strlen] = '\0';
565 switch (esc_args[0]) {
568 set_icon (osc_string);
569 if (esc_args[0] == 1)
571 /* fall through: parameter 0 means set both */
574 set_title (osc_string);
581 * Remove everything currently in `inbuf' and stick it up on the
582 * in-memory display. There's a big state machine in here to
583 * process escape sequences...
585 void term_out(void) {
588 while ( (c = inbuf_getc()) != -1) {
590 * Optionally log the session traffic to a file. Useful for
591 * debugging and possibly also useful for actual logging.
594 static FILE *fp = NULL;
595 if (!fp) fp = fopen(logfile, "wb");
596 if (fp) fputc (c, fp);
598 if( termstate < DO_CTRLS && (c&0x60) == 0 ) {
600 case '\005': /* terminal type query */
601 ldisc->send ("PuTTY\r", 6);
608 if (curs_x == 0 && curs_y > 0)
609 curs_x = cols-1, curs_y--;
615 seen_disp_event = TRUE;
624 termstate = SEEN_ESC;
627 termstate = SEEN_CSI;
629 esc_args[0] = ARG_DEFAULT;
633 termstate = SEEN_OSC;
640 seen_disp_event = TRUE;
645 if (curs_y == marg_b)
646 scroll (marg_t, marg_b, 1, TRUE);
647 else if (curs_y < rows-1)
659 } while (curs_x < cols-1 && !tabs[curs_x]);
663 unsigned long *old_cpos = cpos;
665 check_selection (old_cpos, cpos);
667 seen_disp_event = TRUE;
671 else switch (termstate) {
673 /* Only graphic characters get this far, ctrls are stripped above */
675 cpos[1] = ATTR_WRAPPED;
676 if (curs_y == marg_b)
677 scroll (marg_t, marg_b, 1, TRUE);
678 else if (curs_y < rows-1)
687 check_selection (cpos, cpos+1);
688 *cpos++ = xlat_tty2scr((unsigned char)c) | curr_attr |
689 (c <= 0x7F ? cset_attr[cset] : ATTR_ASCII);
691 if (curs_x == cols) {
700 termstate = TOPLEVEL;
704 * This state is virtually identical to SEEN_ESC, with the
705 * exception that we have an OSC sequence in the pipeline,
706 * and _if_ we see a backslash, we process it.
710 termstate = TOPLEVEL;
713 /* else fall through */
715 termstate = TOPLEVEL;
717 case ' ': /* some weird sequence? */
718 termstate = IGNORE_NEXT;
720 case '[': /* enter CSI mode */
721 termstate = SEEN_CSI;
723 esc_args[0] = ARG_DEFAULT;
726 case ']': /* xterm escape sequences */
727 termstate = SEEN_OSC;
730 case '(': /* should set GL */
733 case ')': /* should set GR */
736 case '7': /* save cursor */
739 case '8': /* restore cursor */
741 seen_disp_event = TRUE;
744 app_keypad_keys = TRUE;
747 app_keypad_keys = FALSE;
749 case 'D': /* exactly equivalent to LF */
750 if (curs_y == marg_b)
751 scroll (marg_t, marg_b, 1, TRUE);
752 else if (curs_y < rows-1)
756 seen_disp_event = TRUE;
759 case 'E': /* exactly equivalent to CR-LF */
762 if (curs_y == marg_b)
763 scroll (marg_t, marg_b, 1, TRUE);
764 else if (curs_y < rows-1)
769 seen_disp_event = TRUE;
771 case 'M': /* reverse index - backwards LF */
772 if (curs_y == marg_t)
773 scroll (marg_t, marg_b, -1, TRUE);
778 seen_disp_event = TRUE;
780 case 'Z': /* terminal type query */
781 ldisc->send ("\033[?6c", 5);
783 case 'c': /* restore power-on settings */
787 seen_disp_event = TRUE;
789 case '#': /* ESC # 8 fills screen with Es :-) */
790 termstate = SEEN_ESCHASH;
792 case 'H': /* set a tab */
798 termstate = TOPLEVEL; /* default */
801 if (esc_nargs <= ARGS_MAX) {
802 if (esc_args[esc_nargs-1] == ARG_DEFAULT)
803 esc_args[esc_nargs-1] = 0;
804 esc_args[esc_nargs-1] =
805 10 * esc_args[esc_nargs-1] + c - '0';
807 termstate = SEEN_CSI;
811 if (++esc_nargs <= ARGS_MAX)
812 esc_args[esc_nargs-1] = ARG_DEFAULT;
813 termstate = SEEN_CSI;
817 if( esc_query ) esc_query = -1;
818 else if( c == '?' ) esc_query = TRUE;
820 termstate = SEEN_CSI;
822 else switch (ANSI(c,esc_query)) {
823 case 'A': /* move up N lines */
824 move (curs_x, curs_y - def(esc_args[0], 1), 1);
825 seen_disp_event = TRUE;
827 case 'B': case 'e': /* move down N lines */
828 move (curs_x, curs_y + def(esc_args[0], 1), 1);
829 seen_disp_event = TRUE;
831 case 'C': case 'a': /* move right N cols */
832 move (curs_x + def(esc_args[0], 1), curs_y, 1);
833 seen_disp_event = TRUE;
835 case 'D': /* move left N cols */
836 move (curs_x - def(esc_args[0], 1), curs_y, 1);
837 seen_disp_event = TRUE;
839 case 'E': /* move down N lines and CR */
840 move (0, curs_y + def(esc_args[0], 1), 1);
841 seen_disp_event = TRUE;
843 case 'F': /* move up N lines and CR */
844 move (0, curs_y - def(esc_args[0], 1), 1);
845 seen_disp_event = TRUE;
847 case 'G': case '`': /* set horizontal posn */
848 move (def(esc_args[0], 1) - 1, curs_y, 0);
849 seen_disp_event = TRUE;
851 case 'd': /* set vertical posn */
852 move (curs_x, (dec_om ? marg_t : 0) + def(esc_args[0], 1) - 1,
854 seen_disp_event = TRUE;
856 case 'H': case 'f': /* set horz and vert posns at once */
858 esc_args[1] = ARG_DEFAULT;
859 move (def(esc_args[1], 1) - 1,
860 (dec_om ? marg_t : 0) + def(esc_args[0], 1) - 1,
862 seen_disp_event = TRUE;
864 case 'J': /* erase screen or parts of it */
866 unsigned int i = def(esc_args[0], 0) + 1;
869 erase_lots(FALSE, !!(i & 2), !!(i & 1));
872 seen_disp_event = TRUE;
874 case 'K': /* erase line or parts of it */
876 unsigned int i = def(esc_args[0], 0) + 1;
879 erase_lots(TRUE, !!(i & 2), !!(i & 1));
881 seen_disp_event = TRUE;
883 case 'L': /* insert lines */
884 if (curs_y <= marg_b)
885 scroll (curs_y, marg_b, -def(esc_args[0], 1), FALSE);
886 seen_disp_event = TRUE;
888 case 'M': /* delete lines */
889 if (curs_y <= marg_b)
890 scroll (curs_y, marg_b, def(esc_args[0], 1), TRUE);
891 seen_disp_event = TRUE;
893 case '@': /* insert chars */
894 insch (def(esc_args[0], 1));
895 seen_disp_event = TRUE;
897 case 'P': /* delete chars */
898 insch (-def(esc_args[0], 1));
899 seen_disp_event = TRUE;
901 case 'c': /* terminal type query */
902 ldisc->send ("\033[?6c", 5);
904 case 'n': /* cursor position query */
905 if (esc_args[0] == 6) {
907 sprintf (buf, "\033[%d;%dR", curs_y + 1, curs_x + 1);
908 ldisc->send (buf, strlen(buf));
911 case 'h': /* toggle a mode to high */
913 toggle_mode (esc_args[0], esc_query, TRUE);
915 case 'l': /* toggle a mode to low */
917 toggle_mode (esc_args[0], esc_query, FALSE);
919 case 'g': /* clear tabs */
920 if (esc_nargs == 1) {
921 if (esc_args[0] == 0) {
922 tabs[curs_x] = FALSE;
923 } else if (esc_args[0] == 3) {
925 for (i = 0; i < cols; i++)
930 case 'r': /* set scroll margins */
931 if (esc_nargs <= 2) {
933 top = def(esc_args[0], 1) - 1;
936 bot = (esc_nargs <= 1 || esc_args[1] == 0 ? rows :
937 def(esc_args[1], rows)) - 1;
945 * I used to think the cursor should be
946 * placed at the top of the newly marginned
947 * area. Apparently not: VMS TPU falls over
952 seen_disp_event = TRUE;
956 case 'm': /* set graphics rendition */
959 for (i=0; i<esc_nargs; i++) {
960 switch (def(esc_args[i], 0)) {
961 case 0: /* restore defaults */
962 curr_attr = ATTR_DEFAULT; break;
963 case 1: /* enable bold */
964 curr_attr |= ATTR_BOLD; break;
965 case 4: /* enable underline */
966 case 21: /* (enable double underline) */
967 curr_attr |= ATTR_UNDER; break;
968 case 7: /* enable reverse video */
969 curr_attr |= ATTR_REVERSE; break;
970 case 22: /* disable bold */
971 curr_attr &= ~ATTR_BOLD; break;
972 case 24: /* disable underline */
973 curr_attr &= ~ATTR_UNDER; break;
974 case 27: /* disable reverse video */
975 curr_attr &= ~ATTR_REVERSE; break;
976 case 30: case 31: case 32: case 33:
977 case 34: case 35: case 36: case 37:
979 curr_attr &= ~ATTR_FGMASK;
980 curr_attr |= (esc_args[i] - 30) << ATTR_FGSHIFT;
982 case 39: /* default-foreground */
983 curr_attr &= ~ATTR_FGMASK;
984 curr_attr |= ATTR_DEFFG;
986 case 40: case 41: case 42: case 43:
987 case 44: case 45: case 46: case 47:
989 curr_attr &= ~ATTR_BGMASK;
990 curr_attr |= (esc_args[i] - 40) << ATTR_BGSHIFT;
992 case 49: /* default-background */
993 curr_attr &= ~ATTR_BGMASK;
994 curr_attr |= ATTR_DEFBG;
1000 case 's': /* save cursor */
1003 case 'u': /* restore cursor */
1004 save_cursor (FALSE);
1005 seen_disp_event = TRUE;
1007 case 't': /* set page size - ie window height */
1008 request_resize (cols, def(esc_args[0], 24));
1011 case 'X': /* write N spaces w/o moving cursor */
1013 int n = def(esc_args[0], 1);
1014 unsigned long *p = cpos;
1015 if (n > cols - curs_x)
1017 check_selection (cpos, cpos+n);
1020 seen_disp_event = TRUE;
1023 case 'x': /* report terminal characteristics */
1026 int i = def(esc_args[0], 0);
1027 if (i == 0 || i == 1) {
1028 strcpy (buf, "\033[2;1;1;112;112;1;0x");
1030 ldisc->send (buf, 20);
1040 cset_attr[termstate == SET_GL ? 0 : 1] = ATTR_GBCHR;
1043 cset_attr[termstate == SET_GL ? 0 : 1] = ATTR_LINEDRW;
1045 default: /* specifically, 'B' */
1046 cset_attr[termstate == SET_GL ? 0 : 1] = ATTR_ASCII;
1050 termstate = TOPLEVEL;
1055 case 'P': /* Linux palette sequence */
1056 termstate = SEEN_OSC_P;
1059 case 'R': /* Linux palette reset */
1062 termstate = TOPLEVEL;
1064 case 'W': /* word-set */
1065 termstate = SEEN_OSC_W;
1068 case '0': case '1': case '2': case '3': case '4':
1069 case '5': case '6': case '7': case '8': case '9':
1070 esc_args[0] = 10 * esc_args[0] + c - '0';
1074 * Grotty hack to support xterm and DECterm title
1075 * sequences concurrently.
1077 if (esc_args[0] == 2) {
1081 /* else fall through */
1083 termstate = OSC_STRING;
1089 * This OSC stuff is EVIL. It takes just one character to get into
1090 * sysline mode and it's not initially obvious how to get out.
1091 * So I've added CR and LF as string aborts.
1092 * This shouldn't effect compatibility as I believe embedded
1093 * control characters are supposed to be interpreted (maybe?)
1094 * and they don't display anything useful anyway.
1098 if (c == '\n' || c == '\r') {
1099 termstate = TOPLEVEL;
1100 } else if (c == 0234 || c == '\007' ) {
1102 * These characters terminate the string; ST and BEL
1103 * terminate the sequence and trigger instant
1104 * processing of it, whereas ESC goes back to SEEN_ESC
1105 * mode unless it is followed by \, in which case it is
1106 * synonymous with ST in the first place.
1109 termstate = TOPLEVEL;
1110 } else if (c == '\033')
1111 termstate = OSC_MAYBE_ST;
1112 else if (osc_strlen < OSC_STR_MAX)
1113 osc_string[osc_strlen++] = c;
1117 int max = (osc_strlen == 0 ? 21 : 16);
1119 if (c >= '0' && c <= '9')
1121 else if (c >= 'A' && c <= 'A'+max-10)
1123 else if (c >= 'a' && c <= 'a'+max-10)
1126 termstate = TOPLEVEL;
1127 osc_string[osc_strlen++] = val;
1128 if (osc_strlen >= 7) {
1129 palette_set (osc_string[0],
1130 osc_string[1] * 16 + osc_string[2],
1131 osc_string[3] * 16 + osc_string[4],
1132 osc_string[5] * 16 + osc_string[6]);
1134 termstate = TOPLEVEL;
1140 case '0': case '1': case '2': case '3': case '4':
1141 case '5': case '6': case '7': case '8': case '9':
1142 esc_args[0] = 10 * esc_args[0] + c - '0';
1145 termstate = OSC_STRING;
1151 unsigned long *p = scrtop;
1152 int n = rows * (cols+1);
1154 *p++ = ATTR_DEFAULT | 'E';
1156 seen_disp_event = TRUE;
1157 check_selection (scrtop, scrtop + rows * (cols+1));
1159 termstate = TOPLEVEL;
1162 check_selection (cpos, cpos+1);
1165 if (nl_count > MAXNL)
1170 * Compare two lines to determine whether they are sufficiently
1171 * alike to scroll-optimise one to the other. Return the degree of
1174 static int linecmp (unsigned long *a, unsigned long *b) {
1177 for (i=n=0; i < cols; i++)
1178 n += (*a++ == *b++);
1183 * Given a context, update the window. Out of paranoia, we don't
1184 * allow WM_PAINT responses to do scrolling optimisations.
1186 static void do_paint (Context ctx, int may_optimise){
1187 int i, j, start, our_curs_y;
1188 unsigned long attr, rv, cursor;
1191 cursor = (has_focus ? ATTR_ACTCURS : ATTR_PASCURS);
1192 rv = (rvideo ? ATTR_REVERSE : 0);
1193 our_curs_y = curs_y + (scrtop - disptop) / (cols+1);
1195 for (i=0; i<rows; i++) {
1196 int idx = i*(cols+1);
1197 for (j=0; j<=cols; j++,idx++) {
1198 unsigned long *d = disptop+idx;
1199 wanttext[idx] = ((*d ^ rv
1200 ^ (selstart <= d && d < selend ?
1201 ATTR_REVERSE : 0)) |
1202 (i==our_curs_y && j==curs_x ? cursor : 0));
1207 * We would perform scrolling optimisations in here, if they
1208 * didn't have a nasty tendency to cause the whole sodding
1209 * program to hang for a second at speed-critical moments.
1210 * We'll leave it well alone...
1213 for (i=0; i<rows; i++) {
1214 int idx = i*(cols+1);
1216 for (j=0; j<=cols; j++,idx++) {
1217 unsigned long t = wanttext[idx];
1218 int needs_update = (j < cols && t != disptext[idx]);
1219 int keep_going = (start != -1 && needs_update &&
1220 (t & ATTR_MASK) == attr &&
1221 j-start < sizeof(ch));
1222 if (start != -1 && !keep_going) {
1223 do_text (ctx, start, i, ch, j-start, attr);
1229 attr = t & ATTR_MASK;
1231 ch[j-start] = (char) (t & CHAR_MASK);
1239 * Invalidate the whole screen so it will be repainted in full.
1241 void term_invalidate(void) {
1244 for (i=0; i<rows*(cols+1); i++)
1245 disptext[i] = ATTR_INVALID;
1249 * Paint the window in response to a WM_PAINT message.
1251 void term_paint (Context ctx, int l, int t, int r, int b) {
1252 int i, j, left, top, right, bottom;
1254 left = l / font_width;
1255 right = (r - 1) / font_width;
1256 top = t / font_height;
1257 bottom = (b - 1) / font_height;
1258 for (i = top; i <= bottom && i < rows ; i++)
1259 for (j = left; j <= right && j < cols ; j++)
1260 disptext[i*(cols+1)+j] = ATTR_INVALID;
1262 do_paint (ctx, FALSE);
1266 * Attempt to scroll the scrollback. The second parameter gives the
1267 * position we want to scroll to; the first is +1 to denote that
1268 * this position is relative to the beginning of the scrollback, -1
1269 * to denote it is relative to the end, and 0 to denote that it is
1270 * relative to the current position.
1272 void term_scroll (int rel, int where) {
1273 int n = where * (cols+1);
1275 disptop = (rel < 0 ? scrtop :
1276 rel > 0 ? sbtop : disptop) + n;
1277 if (disptop < sbtop)
1279 if (disptop > scrtop)
1286 * Spread the selection outwards according to the selection mode.
1288 static unsigned long *sel_spread_half (unsigned long *p, int dir) {
1289 unsigned long *linestart, *lineend;
1293 x = (p - text) % (cols+1);
1295 lineend = linestart + cols;
1300 * In this mode, every character is a separate unit, except
1301 * for runs of spaces at the end of a non-wrapping line.
1303 if (!(linestart[cols] & ATTR_WRAPPED)) {
1304 unsigned long *q = lineend;
1305 while (q > linestart && (q[-1] & CHAR_MASK) == 0x20)
1310 p = (dir == -1 ? q : lineend - 1);
1315 * In this mode, the units are maximal runs of characters
1316 * whose `wordness' has the same value.
1318 wvalue = wordness[*p & CHAR_MASK];
1320 while (p < lineend && wordness[p[1] & CHAR_MASK] == wvalue)
1323 while (p > linestart && wordness[p[-1] & CHAR_MASK] == wvalue)
1329 * In this mode, every line is a unit.
1331 p = (dir == -1 ? linestart : lineend - 1);
1337 static void sel_spread (void) {
1338 selstart = sel_spread_half (selstart, -1);
1339 selend = sel_spread_half (selend - 1, +1) + 1;
1342 void term_mouse (Mouse_Button b, Mouse_Action a, int x, int y) {
1343 unsigned long *selpoint;
1346 if (y>=rows) y = rows-1;
1354 if (x>=cols) x = cols-1;
1356 selpoint = disptop + y * (cols+1) + x;
1358 if (b == MB_SELECT && a == MA_CLICK) {
1360 selstate = ABOUT_TO;
1361 selanchor = selpoint;
1363 } else if (b == MB_SELECT && (a == MA_2CLK || a == MA_3CLK)) {
1365 selmode = (a == MA_2CLK ? SM_WORD : SM_LINE);
1366 selstate = DRAGGING;
1367 selstart = selanchor = selpoint;
1368 selend = selstart + 1;
1370 } else if ((b == MB_SELECT && a == MA_DRAG) ||
1371 (b == MB_EXTEND && a != MA_RELEASE)) {
1372 if (selstate == ABOUT_TO && selanchor == selpoint)
1374 if (b == MB_EXTEND && a != MA_DRAG && selstate == SELECTED) {
1375 if (selpoint-selstart < (selend-selstart)/2)
1376 selanchor = selend - 1;
1378 selanchor = selstart;
1379 selstate = DRAGGING;
1381 if (selstate != ABOUT_TO && selstate != DRAGGING)
1382 selanchor = selpoint;
1383 selstate = DRAGGING;
1384 if (selpoint < selanchor) {
1385 selstart = selpoint;
1386 selend = selanchor + 1;
1388 selstart = selanchor;
1389 selend = selpoint + 1;
1392 } else if ((b == MB_SELECT || b == MB_EXTEND) && a == MA_RELEASE) {
1393 if (selstate == DRAGGING) {
1395 * We've completed a selection. We now transfer the
1396 * data to the clipboard.
1398 unsigned char *p = selspace;
1399 unsigned long *q = selstart;
1401 while (q < selend) {
1403 unsigned long *lineend = q - (q-text) % (cols+1) + cols;
1404 unsigned long *nlpos = lineend;
1406 if (!(*nlpos & ATTR_WRAPPED)) {
1407 while ((nlpos[-1] & CHAR_MASK) == 0x20 && nlpos > q)
1412 while (q < nlpos && q < selend)
1413 *p++ = (unsigned char) (*q++ & CHAR_MASK);
1416 for (i=0; i<sizeof(sel_nl); i++)
1419 q = lineend + 1; /* start of next line */
1421 write_clip (selspace, p - selspace);
1422 selstate = SELECTED;
1424 selstate = NO_SELECTION;
1425 } else if (b == MB_PASTE && (a==MA_CLICK || a==MA_2CLK || a==MA_3CLK)) {
1429 get_clip((void **) &data, &len);
1433 while (p < data+len) {
1434 while (p < data+len &&
1435 !(p <= data+len-sizeof(sel_nl) &&
1436 !memcmp(p, sel_nl, sizeof(sel_nl))))
1444 c=xlat_kbd2tty(q[i]);
1449 if (p <= data+len-sizeof(sel_nl) &&
1450 !memcmp(p, sel_nl, sizeof(sel_nl))) {
1451 ldisc->send ("\r", 1);
1452 p += sizeof(sel_nl);
1457 get_clip(NULL, NULL);
1463 static void deselect (void) {
1464 selstate = NO_SELECTION;
1465 selstart = selend = scrtop;
1468 void term_deselect (void) {