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];
50 #define OSC_STR_MAX 2048
51 static int osc_strlen;
52 static char osc_string[OSC_STR_MAX+1];
55 static unsigned char *tabs;
60 static int scroll_heuristic;
63 TOPLEVEL, IGNORE_NEXT,
64 SEEN_ESC, SEEN_CSI, SET_GL, SET_GR,
65 SEEN_OSC, SEEN_OSC_P, SEEN_OSC_W, OSC_STRING, OSC_MAYBE_ST,
70 NO_SELECTION, ABOUT_TO, DRAGGING, SELECTED
73 SM_CHAR, SM_WORD, SM_LINE
75 static unsigned long *selstart, *selend, *selanchor;
77 static short wordness[256] = {
78 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 */
79 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 */
80 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 */
81 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 */
82 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 */
83 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 */
84 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 */
85 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 */
88 static unsigned char sel_nl[] = SEL_NL;
91 * Internal prototypes.
93 static void do_paint (Context, int);
94 static void erase_lots (int, int, int);
95 static void swap_screen (int);
96 static void update_sbar (void);
97 static void deselect (void);
100 * Set up power-on settings for the terminal.
102 static void power_on(void) {
103 curs_x = curs_y = alt_x = alt_y = save_x = save_y = 0;
106 alt_b = marg_b = rows - 1;
111 for (i = 0; i < cols; i++)
112 tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
114 alt_om = dec_om = cfg.dec_om;
115 alt_wnext = wrapnext = alt_ins = insert = FALSE;
116 alt_wrap = wrap = cfg.wrap_mode;
118 cset_attr[0] = cset_attr[1] = ATTR_ASCII;
120 save_attr = curr_attr = ATTR_DEFAULT;
121 app_cursor_keys = cfg.app_cursor;
122 app_keypad_keys = cfg.app_keypad;
126 for (i = 0; i < 256; i++)
127 wordness[i] = cfg.wordness[i];
131 erase_lots (FALSE, TRUE, TRUE);
133 erase_lots (FALSE, TRUE, TRUE);
138 * Force a screen update.
140 void term_update(void) {
144 do_paint (ctx, TRUE);
147 scroll_heuristic = 0;
152 * Same as power_on(), but an external function.
154 void term_pwron(void) {
163 * Clear the scrollback.
165 void term_clrsb(void) {
166 disptop = sbtop = scrtop;
171 * Initialise the terminal.
173 void term_init(void) {
174 text = sbtop = scrtop = disptop = cpos = NULL;
175 disptext = wanttext = NULL;
185 * Set up the terminal for a given size.
187 void term_size(int newrows, int newcols, int newsavelines) {
188 unsigned long *newtext, *newdisp, *newwant, *newalt;
189 int i, j, crows, ccols;
191 if (newrows == rows && newcols == cols && newsavelines == savelines)
192 return; /* nothing to do */
195 alt_b = marg_b = newrows - 1;
197 newtext = smalloc ((newrows+newsavelines)*(newcols+1)*TSIZE);
198 disptop = newtext + newsavelines*(newcols+1);
199 for (i=0; i<(newrows+newsavelines)*(newcols+1); i++)
200 newtext[i] = ERASE_CHAR;
202 crows = rows + (scrtop - sbtop) / (cols+1);
203 if (crows > newrows+newsavelines)
204 crows = newrows+newsavelines;
205 ccols = (cols < newcols ? cols : newcols);
206 for (i=0; i<crows; i++) {
207 int oldidx = (rows + savelines - crows + i) * (cols+1);
208 int newidx = (newrows + newsavelines - crows + i) * (newcols+1);
209 for (j=0; j<ccols; j++)
210 newtext[newidx+j] = text[oldidx+j];
211 newtext[newidx+newcols] =
212 (cols == newcols ? text[oldidx+cols] : 0);
214 sbtop = disptop - (crows - newrows) * (newcols+1);
223 newdisp = smalloc (newrows*(newcols+1)*TSIZE);
224 for (i=0; i<newrows*(newcols+1); i++)
225 newdisp[i] = ATTR_INVALID;
229 newwant = smalloc (newrows*(newcols+1)*TSIZE);
230 for (i=0; i<newrows*(newcols+1); i++)
231 newwant[i] = ATTR_INVALID;
235 newalt = smalloc (newrows*(newcols+1)*TSIZE);
236 for (i=0; i<newrows*(newcols+1); i++)
237 newalt[i] = ERASE_CHAR;
242 selspace = smalloc ( (newrows+newsavelines) * (newcols+sizeof(sel_nl)) );
244 tabs = srealloc (tabs, newcols*sizeof(*tabs));
247 for (i = (cols > 0 ? cols : 0); i < newcols; i++)
248 tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
252 curs_y += newrows - rows;
255 if (curs_y >= newrows)
257 if (curs_x >= newcols)
260 wrapnext = alt_wnext = FALSE;
264 savelines = newsavelines;
275 static void swap_screen (int which) {
279 if (which == alt_which)
284 for (t=0; t<rows*(cols+1); t++) {
285 tt = scrtop[t]; scrtop[t] = alttext[t]; alttext[t] = tt;
288 t = curs_x; curs_x = alt_x; alt_x = t;
289 t = curs_y; curs_y = alt_y; alt_y = t;
290 t = marg_t; marg_t = alt_t; alt_t = t;
291 t = marg_b; marg_b = alt_b; alt_b = t;
292 t = dec_om; dec_om = alt_om; alt_om = t;
293 t = wrap; wrap = alt_wrap; alt_wrap = t;
294 t = wrapnext; wrapnext = alt_wnext; alt_wnext = t;
295 t = insert; insert = alt_ins; alt_ins = t;
296 t = cset; cset = alt_cset; alt_cset = t;
302 * Retrieve a character from `inbuf'.
304 static int inbuf_getc(void) {
305 if (inbuf_head == inbuf_reap)
309 inbuf_reap = (inbuf_reap+1) & INBUF_MASK;
315 * Update the scroll bar.
317 static void update_sbar(void) {
320 min = (sbtop - text) / (cols+1);
321 set_sbar ((scrtop - text) / (cols+1) + rows - min,
322 (disptop - text) / (cols+1) - min,
327 * Check whether the region bounded by the two pointers intersects
328 * the scroll region, and de-select the on-screen selection if so.
330 static void check_selection (unsigned long *from, unsigned long *to) {
331 if (from < selend && selstart < to)
336 * Scroll the screen. (`lines' is +ve for scrolling forward, -ve
337 * for backward.) `sb' is TRUE if the scrolling is permitted to
338 * affect the scrollback buffer.
340 static void scroll (int topline, int botline, int lines, int sb) {
341 unsigned long *scroll_top;
342 int scroll_size, size, i;
344 scroll_top = scrtop + topline*(cols+1);
345 size = (lines < 0 ? -lines : lines) * (cols+1);
346 scroll_size = (botline - topline + 1) * (cols+1) - size;
348 if (lines > 0 && topline == 0 && botline == (rows-1) && sb) {
350 * Since we're going to scroll the whole screen upwards,
351 * let's also affect the scrollback buffer.
353 sbtop -= lines * (cols+1);
356 scroll_size += scroll_top - sbtop;
361 if (scroll_size < 0) {
368 memmove (scroll_top, scroll_top + size, scroll_size*TSIZE);
369 for (i = 0; i < size; i++)
370 scroll_top[i+scroll_size] = ERASE_CHAR;
371 if (selstart > scroll_top &&
372 selstart < scroll_top + size + scroll_size) {
374 if (selstart < scroll_top)
375 selstart = scroll_top;
377 if (selend > scroll_top &&
378 selend < scroll_top + size + scroll_size) {
380 if (selend < scroll_top)
385 memmove (scroll_top + size, scroll_top, scroll_size*TSIZE);
386 for (i = 0; i < size; i++)
387 scroll_top[i] = ERASE_CHAR;
388 if (selstart > scroll_top &&
389 selstart < scroll_top + size + scroll_size) {
391 if (selstart > scroll_top + size + scroll_size)
392 selstart = scroll_top + size + scroll_size;
394 if (selend > scroll_top &&
395 selend < scroll_top + size + scroll_size) {
397 if (selend > scroll_top + size + scroll_size)
398 selend = scroll_top + size + scroll_size;
402 scroll_heuristic += lines;
406 * Move the cursor to a given position, clipping at boundaries. We
407 * may or may not want to clip at the scroll margin: marg_clip is 0
408 * not to, 1 to disallow _passing_ the margins, and 2 to disallow
409 * even _being_ outside the margins.
411 static void move (int x, int y, int marg_clip) {
417 if ((curs_y >= marg_t || marg_clip == 2) && y < marg_t)
419 if ((curs_y <= marg_b || marg_clip == 2) && y > marg_b)
433 * Save or restore the cursor and SGR mode.
435 static void save_cursor(int save) {
439 save_attr = curr_attr;
441 save_csattr = cset_attr[cset];
445 curr_attr = save_attr;
447 cset_attr[cset] = save_csattr;
453 * Erase a large portion of the screen: the whole screen, or the
454 * whole line, or parts thereof.
456 static void erase_lots (int line_only, int from_begin, int to_end) {
457 unsigned long *startpos, *endpos;
460 startpos = cpos - curs_x;
461 endpos = startpos + cols+1;
464 endpos = startpos + rows * (cols+1);
470 check_selection (startpos, endpos);
471 while (startpos < endpos)
472 *startpos++ = ERASE_CHAR;
476 * Insert or delete characters within the current line. n is +ve if
477 * insertion is desired, and -ve for deletion.
479 static void insch (int n) {
480 int dir = (n < 0 ? -1 : +1);
483 n = (n < 0 ? -n : n);
484 if (n > cols - curs_x)
486 m = cols - curs_x - n;
487 check_selection (cpos, cpos+n);
489 memmove (cpos, cpos+n, m*TSIZE);
491 cpos[m++] = ERASE_CHAR;
493 memmove (cpos+n, cpos, m*TSIZE);
495 cpos[n] = ERASE_CHAR;
500 * Toggle terminal mode `mode' to state `state'. (`query' indicates
501 * whether the mode is a DEC private one or a normal one.)
503 static void toggle_mode (int mode, int query, int state) {
504 if (query) switch (mode) {
505 case 1: /* application cursor keys */
506 app_cursor_keys = state;
508 case 3: /* 80/132 columns */
510 request_resize (state ? 132 : 80, rows);
512 case 5: /* reverse video */
516 case 6: /* DEC origin mode */
519 case 7: /* auto wrap */
522 case 47: /* alternate screen */
527 } else switch (mode) {
528 case 4: /* set insert mode */
535 * Process an OSC sequence: set window title or icon name.
537 static void do_osc(void) {
540 wordness[(unsigned char)osc_string[osc_strlen]] = esc_args[0];
542 osc_string[osc_strlen] = '\0';
543 switch (esc_args[0]) {
546 set_icon (osc_string);
547 if (esc_args[0] == 1)
549 /* fall through: parameter 0 means set both */
552 set_title (osc_string);
559 * Remove everything currently in `inbuf' and stick it up on the
560 * in-memory display. There's a big state machine in here to
561 * process escape sequences...
563 void term_out(void) {
565 int must_update = FALSE;
567 while ( (c = inbuf_getc()) != -1) {
570 static FILE *fp = NULL;
571 if (!fp) fp = fopen("putty.log", "wb");
572 if (fp) fputc (c, fp);
579 case '\005': /* terminal type query */
580 back->send ("\033[?1;2c", 7);
588 if (curs_x == 0 && curs_y > 0)
589 curs_x = cols-1, curs_y--;
605 termstate = SEEN_ESC;
608 termstate = SEEN_CSI;
610 esc_args[0] = ARG_DEFAULT;
614 termstate = SEEN_OSC;
627 if (curs_y == marg_b)
628 scroll (marg_t, marg_b, 1, TRUE);
629 else if (curs_y < rows-1)
641 } while (curs_x < cols-1 && !tabs[curs_x]);
645 unsigned long *old_cpos = cpos;
647 check_selection (old_cpos, cpos);
653 if (c >= ' ' && c != 0234) {
655 cpos[1] = ATTR_WRAPPED;
656 if (curs_y == marg_b)
657 scroll (marg_t, marg_b, 1, TRUE);
658 else if (curs_y < rows-1)
667 check_selection (cpos, cpos+1);
668 *cpos++ = c | curr_attr |
669 (c <= 0x7F ? cset_attr[cset] : ATTR_ASCII);
671 if (curs_x == cols) {
681 termstate = TOPLEVEL;
685 * This state is virtually identical to SEEN_ESC, with the
686 * exception that we have an OSC sequence in the pipeline,
687 * and _if_ we see a backslash, we process it.
691 termstate = TOPLEVEL;
694 /* else fall through */
696 termstate = TOPLEVEL;
698 case '\005': case '\007': case '\b': case '\016': case '\017':
699 case '\033': case 0233: case 0234: case 0235: case '\r':
700 case '\013': case '\014': case '\n': case '\t':
701 termstate = TOPLEVEL;
702 goto do_toplevel; /* hack... */
703 case ' ': /* some weird sequence? */
704 termstate = IGNORE_NEXT;
706 case '[': /* enter CSI mode */
707 termstate = SEEN_CSI;
709 esc_args[0] = ARG_DEFAULT;
712 case ']': /* xterm escape sequences */
713 termstate = SEEN_OSC;
716 case '(': /* should set GL */
719 case ')': /* should set GR */
722 case '7': /* save cursor */
725 case '8': /* restore cursor */
731 app_keypad_keys = TRUE;
734 app_keypad_keys = FALSE;
736 case 'D': /* exactly equivalent to LF */
737 if (curs_y == marg_b)
738 scroll (marg_t, marg_b, 1, TRUE);
739 else if (curs_y < rows-1)
746 case 'E': /* exactly equivalent to CR-LF */
749 if (curs_y == marg_b)
750 scroll (marg_t, marg_b, 1, TRUE);
751 else if (curs_y < rows-1)
758 case 'M': /* reverse index - backwards LF */
759 if (curs_y == marg_t)
760 scroll (marg_t, marg_b, -1, TRUE);
768 case 'Z': /* terminal type query */
769 back->send ("\033[?6c", 5);
771 case 'c': /* restore power-on settings */
777 case '#': /* ESC # 8 fills screen with Es :-) */
778 termstate = SEEN_ESCHASH;
780 case 'H': /* set a tab */
786 termstate = TOPLEVEL; /* default */
788 case '\005': case '\007': case '\b': case '\016': case '\017':
789 case '\033': case 0233: case 0234: case 0235: case '\r':
790 case '\013': case '\014': case '\n': case '\t':
791 termstate = TOPLEVEL;
792 goto do_toplevel; /* hack... */
793 case '0': case '1': case '2': case '3': case '4':
794 case '5': case '6': case '7': case '8': case '9':
795 if (esc_nargs <= ARGS_MAX) {
796 if (esc_args[esc_nargs-1] == ARG_DEFAULT)
797 esc_args[esc_nargs-1] = 0;
798 esc_args[esc_nargs-1] =
799 10 * esc_args[esc_nargs-1] + c - '0';
801 termstate = SEEN_CSI;
804 if (++esc_nargs <= ARGS_MAX)
805 esc_args[esc_nargs-1] = ARG_DEFAULT;
806 termstate = SEEN_CSI;
810 termstate = SEEN_CSI;
812 case 'A': /* move up N lines */
813 move (curs_x, curs_y - def(esc_args[0], 1), 1);
817 case 'B': case 'e': /* move down N lines */
818 move (curs_x, curs_y + def(esc_args[0], 1), 1);
822 case 'C': case 'a': /* move right N cols */
823 move (curs_x + def(esc_args[0], 1), curs_y, 1);
827 case 'D': /* move left N cols */
828 move (curs_x - def(esc_args[0], 1), curs_y, 1);
832 case 'E': /* move down N lines and CR */
833 move (0, curs_y + def(esc_args[0], 1), 1);
837 case 'F': /* move up N lines and CR */
838 move (0, curs_y - def(esc_args[0], 1), 1);
842 case 'G': case '`': /* set horizontal posn */
843 move (def(esc_args[0], 1) - 1, curs_y, 0);
847 case 'd': /* set vertical posn */
848 move (curs_x, (dec_om ? marg_t : 0) + def(esc_args[0], 1) - 1,
853 case 'H': case 'f': /* set horz and vert posns at once */
855 esc_args[1] = ARG_DEFAULT;
856 move (def(esc_args[1], 1) - 1,
857 (dec_om ? marg_t : 0) + def(esc_args[0], 1) - 1,
862 case 'J': /* erase screen or parts of it */
864 unsigned int i = def(esc_args[0], 0) + 1;
867 erase_lots(FALSE, !!(i & 2), !!(i & 1));
872 case 'K': /* erase line or parts of it */
874 unsigned int i = def(esc_args[0], 0) + 1;
877 erase_lots(TRUE, !!(i & 2), !!(i & 1));
882 case 'L': /* insert lines */
883 if (curs_y <= marg_b)
884 scroll (curs_y, marg_b, -def(esc_args[0], 1), FALSE);
888 case 'M': /* delete lines */
889 if (curs_y <= marg_b)
890 scroll (curs_y, marg_b, def(esc_args[0], 1), FALSE);
894 case '@': /* insert chars */
895 insch (def(esc_args[0], 1));
899 case 'P': /* delete chars */
900 insch (-def(esc_args[0], 1));
904 case 'c': /* terminal type query */
905 back->send ("\033[?6c", 5);
907 case 'n': /* cursor position query */
908 if (esc_args[0] == 6) {
910 sprintf (buf, "\033[%d;%dR", curs_y + 1, curs_x + 1);
911 back->send (buf, strlen(buf));
914 case 'h': /* toggle a mode to high */
915 toggle_mode (esc_args[0], esc_query, TRUE);
917 case 'l': /* toggle a mode to low */
918 toggle_mode (esc_args[0], esc_query, FALSE);
920 case 'g': /* clear tabs */
921 if (esc_nargs == 1) {
922 if (esc_args[0] == 0) {
923 tabs[curs_x] = FALSE;
924 } else if (esc_args[0] == 3) {
926 for (i = 0; i < cols; i++)
931 case 'r': /* set scroll margins */
932 if (esc_nargs <= 2) {
934 top = def(esc_args[0], 1) - 1;
937 bot = (esc_nargs <= 1 || esc_args[1] == 0 ? rows :
938 def(esc_args[1], rows)) - 1;
946 * I used to think the cursor should be
947 * placed at the top of the newly marginned
948 * area. Apparently not: VMS TPU falls over
958 case 'm': /* set graphics rendition */
961 for (i=0; i<esc_nargs; i++) {
962 switch (def(esc_args[i], 0)) {
963 case 0: /* restore defaults */
964 curr_attr = ATTR_DEFAULT; break;
965 case 1: /* enable bold */
966 curr_attr |= ATTR_BOLD; break;
967 case 4: /* enable underline */
968 case 21: /* (enable double underline) */
969 curr_attr |= ATTR_UNDER; break;
970 case 7: /* enable reverse video */
971 curr_attr |= ATTR_REVERSE; break;
972 case 22: /* disable bold */
973 curr_attr &= ~ATTR_BOLD; break;
974 case 24: /* disable underline */
975 curr_attr &= ~ATTR_UNDER; break;
976 case 27: /* disable reverse video */
977 curr_attr &= ~ATTR_REVERSE; break;
978 case 30: case 31: case 32: case 33:
979 case 34: case 35: case 36: case 37:
981 curr_attr &= ~ATTR_FGMASK;
982 curr_attr |= (esc_args[i] - 30) << ATTR_FGSHIFT;
984 case 39: /* default-foreground */
985 curr_attr &= ~ATTR_FGMASK;
986 curr_attr |= ATTR_DEFFG;
988 case 40: case 41: case 42: case 43:
989 case 44: case 45: case 46: case 47:
991 curr_attr &= ~ATTR_BGMASK;
992 curr_attr |= (esc_args[i] - 40) << ATTR_BGSHIFT;
994 case 49: /* default-background */
995 curr_attr &= ~ATTR_BGMASK;
996 curr_attr |= ATTR_DEFBG;
1002 case 's': /* save cursor */
1005 case 'u': /* restore cursor */
1006 save_cursor (FALSE);
1010 case 't': /* set page size - ie window height */
1011 request_resize (cols, def(esc_args[0], 24));
1014 case 'X': /* write N spaces w/o moving cursor */
1016 int n = def(esc_args[0], 1);
1017 unsigned long *p = cpos;
1018 if (n > cols - curs_x)
1020 check_selection (cpos, cpos+n);
1027 case 'x': /* report terminal characteristics */
1030 int i = def(esc_args[0], 0);
1031 if (i == 0 || i == 1) {
1032 strcpy (buf, "\033[2;1;1;112;112;1;0x");
1034 back->send (buf, 20);
1044 cset_attr[termstate == SET_GL ? 0 : 1] = ATTR_GBCHR;
1047 cset_attr[termstate == SET_GL ? 0 : 1] = ATTR_LINEDRW;
1049 default: /* specifically, 'B' */
1050 cset_attr[termstate == SET_GL ? 0 : 1] = ATTR_ASCII;
1053 termstate = TOPLEVEL;
1058 case '\005': case '\007': case '\b': case '\016': case '\017':
1059 case '\033': case 0233: case 0234: case 0235: case '\r':
1060 case '\013': case '\014': case '\n': case '\t':
1061 termstate = TOPLEVEL;
1062 goto do_toplevel; /* hack... */
1063 case 'P': /* Linux palette sequence */
1064 termstate = SEEN_OSC_P;
1067 case 'R': /* Linux palette reset */
1070 termstate = TOPLEVEL;
1072 case 'W': /* word-set */
1073 termstate = SEEN_OSC_W;
1076 case '0': case '1': case '2': case '3': case '4':
1077 case '5': case '6': case '7': case '8': case '9':
1078 esc_args[0] = 10 * esc_args[0] + c - '0';
1082 * Grotty hack to support xterm and DECterm title
1083 * sequences concurrently.
1085 if (esc_args[0] == 2) {
1089 /* else fall through */
1091 termstate = OSC_STRING;
1096 if (c == 0234 || c == '\007') {
1098 * These characters terminate the string; ST and BEL
1099 * terminate the sequence and trigger instant
1100 * processing of it, whereas ESC goes back to SEEN_ESC
1101 * mode unless it is followed by \, in which case it is
1102 * synonymous with ST in the first place.
1105 termstate = TOPLEVEL;
1106 } else if (c == '\033')
1107 termstate = OSC_MAYBE_ST;
1108 else if (osc_strlen < OSC_STR_MAX)
1109 osc_string[osc_strlen++] = c;
1113 int max = (osc_strlen == 0 ? 21 : 16);
1115 if (c >= '0' && c <= '9')
1117 else if (c >= 'A' && c <= 'A'+max-10)
1119 else if (c >= 'a' && c <= 'a'+max-10)
1122 termstate = TOPLEVEL;
1123 osc_string[osc_strlen++] = val;
1124 if (osc_strlen >= 7) {
1125 palette_set (osc_string[0],
1126 osc_string[1] * 16 + osc_string[2],
1127 osc_string[3] * 16 + osc_string[4],
1128 osc_string[5] * 16 + osc_string[6]);
1130 termstate = TOPLEVEL;
1136 case '\005': case '\007': case '\b': case '\016': case '\017':
1137 case '\033': case 0233: case 0234: case 0235: case '\r':
1138 case '\013': case '\014': case '\n': case '\t':
1139 termstate = TOPLEVEL;
1140 goto do_toplevel; /* hack... */
1141 case '0': case '1': case '2': case '3': case '4':
1142 case '5': case '6': case '7': case '8': case '9':
1143 esc_args[0] = 10 * esc_args[0] + c - '0';
1146 termstate = OSC_STRING;
1152 unsigned long *p = scrtop;
1153 int n = rows * (cols+1);
1155 *p++ = ATTR_DEFAULT | 'E';
1158 check_selection (scrtop, scrtop + rows * (cols+1));
1160 termstate = TOPLEVEL;
1163 check_selection (cpos, cpos+1);
1166 if (must_update || nl_count > MAXNL)
1171 * Compare two lines to determine whether they are sufficiently
1172 * alike to scroll-optimise one to the other. Return the degree of
1175 static int linecmp (unsigned long *a, unsigned long *b) {
1178 for (i=n=0; i < cols; i++)
1179 n += (*a++ == *b++);
1184 * Given a context, update the window. Out of paranoia, we don't
1185 * allow WM_PAINT responses to do scrolling optimisations.
1187 static void do_paint (Context ctx, int may_optimise){
1188 int i, j, start, our_curs_y;
1189 unsigned long attr, rv, cursor;
1192 cursor = (has_focus ? ATTR_ACTCURS : ATTR_PASCURS);
1193 rv = (rvideo ? ATTR_REVERSE : 0);
1194 our_curs_y = curs_y + (scrtop - disptop) / (cols+1);
1196 for (i=0; i<rows; i++) {
1197 int idx = i*(cols+1);
1198 for (j=0; j<=cols; j++,idx++) {
1199 unsigned long *d = disptop+idx;
1200 wanttext[idx] = ((*d ^ rv
1201 ^ (selstart <= d && d < selend ?
1202 ATTR_REVERSE : 0)) |
1203 (i==our_curs_y && j==curs_x ? cursor : 0));
1208 * We would perform scrolling optimisations in here, if they
1209 * didn't have a nasty tendency to cause the whole sodding
1210 * program to hang for a second at speed-critical moments.
1211 * We'll leave it well alone...
1214 for (i=0; i<rows; i++) {
1215 int idx = i*(cols+1);
1217 for (j=0; j<=cols; j++,idx++) {
1218 unsigned long t = wanttext[idx];
1219 int needs_update = (j < cols && t != disptext[idx]);
1220 int keep_going = (start != -1 && needs_update &&
1221 (t & ATTR_MASK) == attr &&
1222 j-start < sizeof(ch));
1223 if (start != -1 && !keep_going) {
1224 do_text (ctx, start, i, ch, j-start, attr);
1230 attr = t & ATTR_MASK;
1232 ch[j-start] = (char) (t & CHAR_MASK);
1240 * Invalidate the whole screen so it will be repainted in full.
1242 void term_invalidate(void) {
1245 for (i=0; i<rows*(cols+1); i++)
1246 disptext[i] = ATTR_INVALID;
1250 * Paint the window in response to a WM_PAINT message.
1252 void term_paint (Context ctx, int l, int t, int r, int b) {
1253 int i, j, left, top, right, bottom;
1255 left = l / font_width;
1256 right = (r - 1) / font_width;
1257 top = t / font_height;
1258 bottom = (b - 1) / font_height;
1259 for (i = top; i <= bottom && i < rows ; i++)
1260 for (j = left; j <= right && j < cols ; j++)
1261 disptext[i*(cols+1)+j] = ATTR_INVALID;
1263 do_paint (ctx, FALSE);
1267 * Attempt to scroll the scrollback. The second parameter gives the
1268 * position we want to scroll to; the first is +1 to denote that
1269 * this position is relative to the beginning of the scrollback, -1
1270 * to denote it is relative to the end, and 0 to denote that it is
1271 * relative to the current position.
1273 void term_scroll (int rel, int where) {
1274 int n = where * (cols+1);
1276 disptop = (rel < 0 ? scrtop :
1277 rel > 0 ? sbtop : disptop) + n;
1278 if (disptop < sbtop)
1280 if (disptop > scrtop)
1287 * Spread the selection outwards according to the selection mode.
1289 static unsigned long *sel_spread_half (unsigned long *p, int dir) {
1290 unsigned long *linestart, *lineend;
1294 x = (p - text) % (cols+1);
1296 lineend = linestart + cols;
1301 * In this mode, every character is a separate unit, except
1302 * for runs of spaces at the end of a non-wrapping line.
1304 if (!(linestart[cols] & ATTR_WRAPPED)) {
1305 unsigned long *q = lineend;
1306 while (q > linestart && (q[-1] & CHAR_MASK) == 0x20)
1311 p = (dir == -1 ? q : lineend - 1);
1316 * In this mode, the units are maximal runs of characters
1317 * whose `wordness' has the same value.
1319 wvalue = wordness[*p & CHAR_MASK];
1321 while (p < lineend && wordness[p[1] & CHAR_MASK] == wvalue)
1324 while (p > linestart && wordness[p[-1] & CHAR_MASK] == wvalue)
1330 * In this mode, every line is a unit.
1332 p = (dir == -1 ? linestart : lineend - 1);
1338 static void sel_spread (void) {
1339 selstart = sel_spread_half (selstart, -1);
1340 selend = sel_spread_half (selend - 1, +1) + 1;
1343 void term_mouse (Mouse_Button b, Mouse_Action a, int x, int y) {
1344 unsigned long *selpoint;
1347 if (y>=rows) y = rows-1;
1355 if (x>=cols) x = cols-1;
1357 selpoint = disptop + y * (cols+1) + x;
1359 if (b == MB_SELECT && a == MA_CLICK) {
1361 selstate = ABOUT_TO;
1362 selanchor = selpoint;
1364 } else if (b == MB_SELECT && (a == MA_2CLK || a == MA_3CLK)) {
1366 selmode = (a == MA_2CLK ? SM_WORD : SM_LINE);
1367 selstate = DRAGGING;
1368 selstart = selanchor = selpoint;
1369 selend = selstart + 1;
1371 } else if ((b == MB_SELECT && a == MA_DRAG) ||
1372 (b == MB_EXTEND && a != MA_RELEASE)) {
1373 if (selstate == ABOUT_TO && selanchor == selpoint)
1375 if (b == MB_EXTEND && a != MA_DRAG && selstate == SELECTED) {
1376 if (selpoint-selstart < (selend-selstart)/2)
1377 selanchor = selend - 1;
1379 selanchor = selstart;
1380 selstate = DRAGGING;
1382 if (selstate != ABOUT_TO && selstate != DRAGGING)
1383 selanchor = selpoint;
1384 selstate = DRAGGING;
1385 if (selpoint < selanchor) {
1386 selstart = selpoint;
1387 selend = selanchor + 1;
1389 selstart = selanchor;
1390 selend = selpoint + 1;
1393 } else if ((b == MB_SELECT || b == MB_EXTEND) && a == MA_RELEASE) {
1394 if (selstate == DRAGGING) {
1396 * We've completed a selection. We now transfer the
1397 * data to the clipboard.
1399 unsigned char *p = selspace;
1400 unsigned long *q = selstart;
1402 while (q < selend) {
1404 unsigned long *lineend = q - (q-text) % (cols+1) + cols;
1405 unsigned long *nlpos = lineend;
1407 if (!(*nlpos & ATTR_WRAPPED)) {
1408 while ((nlpos[-1] & CHAR_MASK) == 0x20 && nlpos > q)
1413 while (q < nlpos && q < selend)
1414 *p++ = (unsigned char) (*q++ & CHAR_MASK);
1417 for (i=0; i<sizeof(sel_nl); i++)
1420 q = lineend + 1; /* start of next line */
1422 write_clip (selspace, p - selspace);
1423 selstate = SELECTED;
1425 selstate = NO_SELECTION;
1426 } else if (b == MB_PASTE && (a==MA_CLICK || a==MA_2CLK || a==MA_3CLK)) {
1430 get_clip((void **) &data, &len);
1434 while (p < data+len) {
1435 while (p < data+len &&
1436 !(p <= data+len-sizeof(sel_nl) &&
1437 !memcmp(p, sel_nl, sizeof(sel_nl))))
1439 back->send (q, p-q);
1440 if (p <= data+len-sizeof(sel_nl) &&
1441 !memcmp(p, sel_nl, sizeof(sel_nl))) {
1442 back->send ("\r", 1);
1443 p += sizeof(sel_nl);
1448 get_clip(NULL, NULL);
1454 static void deselect (void) {
1455 selstate = NO_SELECTION;
1456 selstart = selend = scrtop;
1459 void term_deselect (void) {