1 ++ terminal
.c
.new Mon Nov
22 15:02:03 1999
9 static unsigned long *text
; /* buffer of text on terminal screen */
10 static unsigned long *scrtop
; /* top of working screen */
11 static unsigned long *disptop
; /* top of displayed screen */
12 static unsigned long *sbtop
; /* top of scrollback */
13 static unsigned long *cpos
; /* cursor position (convenience) */
14 static unsigned long *disptext
; /* buffer of text on real screen */
15 static unsigned long *wanttext
; /* buffer of text we want on screen */
16 static unsigned long *alttext
; /* buffer of text on alt. screen */
18 static unsigned char *selspace
; /* buffer for building selections in */
20 #define TSIZE (sizeof(*text))
21 #define fix_cpos do { cpos = scrtop + curs_y * (cols+1) + curs_x; } while(0)
23 static unsigned long curr_attr
, save_attr
;
25 static int curs_x
, curs_y
; /* cursor */
26 static int save_x
, save_y
; /* saved cursor position */
27 static int marg_t
, marg_b
; /* scroll margins */
28 static int dec_om
; /* DEC origin mode flag */
29 static int wrap
, wrapnext
; /* wrap flags */
30 static int insert
; /* insert-mode flag */
31 static int cset
; /* 0 or 1: which char set */
32 static int save_cset
, save_csattr
; /* saved with cursor position */
33 static int rvideo
; /* global reverse video flag */
35 static unsigned long cset_attr
[2];
38 * Saved settings on the alternate screen.
40 static int alt_x
, alt_y
, alt_om
, alt_wrap
, alt_wnext
, alt_ins
, alt_cset
;
41 static int alt_t
, alt_b
;
44 #define ARGS_MAX 32 /* max # of esc sequence arguments */
45 #define ARG_DEFAULT -1 /* if an arg isn't specified */
46 #define def(a,d) ( (a) == ARG_DEFAULT ? (d) : (a) )
47 static int esc_args
[ARGS_MAX
];
51 #define OSC_STR_MAX 2048
52 static int osc_strlen
;
53 static char osc_string
[OSC_STR_MAX
+1];
56 static unsigned char *tabs
;
61 static int scroll_heuristic
;
75 OSC_STRING
, OSC_MAYBE_ST
,
80 NO_SELECTION
, ABOUT_TO
, DRAGGING
, SELECTED
83 SM_CHAR
, SM_WORD
, SM_LINE
85 static unsigned long *selstart
, *selend
, *selanchor
;
87 static short wordness
[256] = {
88 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 */
89 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 */
90 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 */
91 1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,1,1,1,1,1, /* 67 */
92 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 */
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, /* AB */
94 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 */
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, /* EF */
98 static unsigned char sel_nl
[] = SEL_NL
;
101 * Internal prototypes.
103 static void do_paint (Context
, int);
104 static void erase_lots (int, int, int);
105 static void swap_screen (int);
106 static void update_sbar (void);
107 static void deselect (void);
110 * Set up power-on settings for the terminal.
112 static void power_on(void) {
113 curs_x
= curs_y
= alt_x
= alt_y
= save_x
= save_y
= 0;
116 alt_b
= marg_b
= rows
- 1;
121 for (i
= 0; i
< cols
; i
++)
122 tabs
[i
] = (i
% 8 == 0 ? TRUE
: FALSE
);
124 alt_om
= dec_om
= cfg
.dec_om
;
125 alt_wnext
= wrapnext
= alt_ins
= insert
= FALSE
;
126 alt_wrap
= wrap
= cfg
.wrap_mode
;
128 cset_attr
[0] = cset_attr
[1] = ATTR_ASCII
;
130 save_attr
= curr_attr
= ATTR_DEFAULT
;
131 app_cursor_keys
= cfg
.app_cursor
;
132 app_keypad_keys
= cfg
.app_keypad
;
136 for (i
= 0; i
< 256; i
++)
137 wordness
[i
] = cfg
.wordness
[i
];
141 erase_lots (FALSE
, TRUE
, TRUE
);
143 erase_lots (FALSE
, TRUE
, TRUE
);
148 * Force a screen update.
150 void term_update(void) {
154 if ( (seen_key_event
&& (unscroll_event
& US_KEY
)) &&
155 (seen_disp_event
&& (unscroll_event
& US_DISP
)) ) {
157 seen_disp_event
= seen_key_event
= 0;
159 do_paint (ctx
, TRUE
);
162 scroll_heuristic
= 0;
167 * Same as power_on(), but an external function.
169 void term_pwron(void) {
178 * Clear the scrollback.
180 void term_clrsb(void) {
181 disptop
= sbtop
= scrtop
;
186 * Initialise the terminal.
188 void term_init(void) {
189 text
= sbtop
= scrtop
= disptop
= cpos
= NULL
;
190 disptext
= wanttext
= NULL
;
200 * Set up the terminal for a given size.
202 void term_size(int newrows
, int newcols
, int newsavelines
) {
203 unsigned long *newtext
, *newdisp
, *newwant
, *newalt
;
204 int i
, j
, crows
, ccols
;
206 if (newrows
== rows
&& newcols
== cols
&& newsavelines
== savelines
)
207 return; /* nothing to do */
210 alt_b
= marg_b
= newrows
- 1;
212 newtext
= smalloc ((newrows
+newsavelines
)*(newcols
+1)*TSIZE
);
213 disptop
= newtext
+ newsavelines
*(newcols
+1);
214 for (i
=0; i
<(newrows
+newsavelines
)*(newcols
+1); i
++)
215 newtext
[i
] = ERASE_CHAR
;
217 crows
= rows
+ (scrtop
- sbtop
) / (cols
+1);
218 if (crows
> newrows
+newsavelines
)
219 crows
= newrows
+newsavelines
;
220 ccols
= (cols
< newcols ? cols
: newcols
);
221 for (i
=0; i
<crows
; i
++) {
222 int oldidx
= (rows
+ savelines
- crows
+ i
) * (cols
+1);
223 int newidx
= (newrows
+ newsavelines
- crows
+ i
) * (newcols
+1);
224 for (j
=0; j
<ccols
; j
++)
225 newtext
[newidx
+j
] = text
[oldidx
+j
];
226 newtext
[newidx
+newcols
] =
227 (cols
== newcols ? text
[oldidx
+cols
] : 0);
229 sbtop
= disptop
- (crows
- newrows
) * (newcols
+1);
238 newdisp
= smalloc (newrows
*(newcols
+1)*TSIZE
);
239 for (i
=0; i
<newrows
*(newcols
+1); i
++)
240 newdisp
[i
] = ATTR_INVALID
;
244 newwant
= smalloc (newrows
*(newcols
+1)*TSIZE
);
245 for (i
=0; i
<newrows
*(newcols
+1); i
++)
246 newwant
[i
] = ATTR_INVALID
;
250 newalt
= smalloc (newrows
*(newcols
+1)*TSIZE
);
251 for (i
=0; i
<newrows
*(newcols
+1); i
++)
252 newalt
[i
] = ERASE_CHAR
;
257 selspace
= smalloc ( (newrows
+newsavelines
) * (newcols
+sizeof(sel_nl
)) );
259 tabs
= srealloc (tabs
, newcols
*sizeof(*tabs
));
262 for (i
= (cols
> 0 ? cols
: 0); i
< newcols
; i
++)
263 tabs
[i
] = (i
% 8 == 0 ? TRUE
: FALSE
);
267 curs_y
+= newrows
- rows
;
270 if (curs_y
>= newrows
)
272 if (curs_x
>= newcols
)
275 wrapnext
= alt_wnext
= FALSE
;
279 savelines
= newsavelines
;
290 static void swap_screen (int which
) {
294 if (which
== alt_which
)
299 for (t
=0; t
<rows
*(cols
+1); t
++) {
300 tt
= scrtop
[t
]; scrtop
[t
] = alttext
[t
]; alttext
[t
] = tt
;
303 t
= curs_x
; curs_x
= alt_x
; alt_x
= t
;
304 t
= curs_y
; curs_y
= alt_y
; alt_y
= t
;
305 t
= marg_t
; marg_t
= alt_t
; alt_t
= t
;
306 t
= marg_b
; marg_b
= alt_b
; alt_b
= t
;
307 t
= dec_om
; dec_om
= alt_om
; alt_om
= t
;
308 t
= wrap
; wrap
= alt_wrap
; alt_wrap
= t
;
309 t
= wrapnext
; wrapnext
= alt_wnext
; alt_wnext
= t
;
310 t
= insert
; insert
= alt_ins
; alt_ins
= t
;
311 t
= cset
; cset
= alt_cset
; alt_cset
= t
;
317 * Retrieve a character from `inbuf'.
319 static int inbuf_getc(void) {
320 if (inbuf_head
== inbuf_reap
)
324 inbuf_reap
= (inbuf_reap
+1) & INBUF_MASK
;
330 * Update the scroll bar.
332 static void update_sbar(void) {
335 min
= (sbtop
- text
) / (cols
+1);
336 set_sbar ((scrtop
- text
) / (cols
+1) + rows
- min
,
337 (disptop
- text
) / (cols
+1) - min
,
342 * Check whether the region bounded by the two pointers intersects
343 * the scroll region, and de-select the on-screen selection if so.
345 static void check_selection (unsigned long *from
, unsigned long *to
) {
346 if (from
< selend
&& selstart
< to
)
351 * Scroll the screen. (`lines' is +ve for scrolling forward, -ve
352 * for backward.) `sb' is TRUE if the scrolling is permitted to
353 * affect the scrollback buffer.
355 static void scroll (int topline
, int botline
, int lines
, int sb
) {
356 unsigned long *scroll_top
;
357 int scroll_size
, size
, i
;
359 scroll_top
= scrtop
+ topline
*(cols
+1);
360 size
= (lines
< 0 ?
-lines
: lines
) * (cols
+1);
361 scroll_size
= (botline
- topline
+ 1) * (cols
+1) - size
;
363 if (lines
> 0 && topline
== 0 && alt_which
== 0 && sb
) {
365 * Since we're going to scroll the top line and we're on the
366 * scrolling screen let's also affect the scrollback buffer.
368 sbtop
-= lines
* (cols
+1);
371 scroll_size
+= scroll_top
- sbtop
;
376 if (scroll_size
< 0) {
383 memmove (scroll_top
, scroll_top
+ size
, scroll_size
*TSIZE
);
384 for (i
= 0; i
< size
; i
++)
385 scroll_top
[i
+scroll_size
] = ERASE_CHAR
;
386 if (selstart
> scroll_top
&&
387 selstart
< scroll_top
+ size
+ scroll_size
) {
389 if (selstart
< scroll_top
)
390 selstart
= scroll_top
;
392 if (selend
> scroll_top
&&
393 selend
< scroll_top
+ size
+ scroll_size
) {
395 if (selend
< scroll_top
)
400 memmove (scroll_top
+ size
, scroll_top
, scroll_size
*TSIZE
);
401 for (i
= 0; i
< size
; i
++)
402 scroll_top
[i
] = ERASE_CHAR
;
403 if (selstart
> scroll_top
&&
404 selstart
< scroll_top
+ size
+ scroll_size
) {
406 if (selstart
> scroll_top
+ size
+ scroll_size
)
407 selstart
= scroll_top
+ size
+ scroll_size
;
409 if (selend
> scroll_top
&&
410 selend
< scroll_top
+ size
+ scroll_size
) {
412 if (selend
> scroll_top
+ size
+ scroll_size
)
413 selend
= scroll_top
+ size
+ scroll_size
;
417 scroll_heuristic
+= lines
;
421 * Move the cursor to a given position, clipping at boundaries. We
422 * may or may not want to clip at the scroll margin: marg_clip is 0
423 * not to, 1 to disallow _passing_ the margins, and 2 to disallow
424 * even _being_ outside the margins.
426 static void move (int x
, int y
, int marg_clip
) {
432 if ((curs_y
>= marg_t
|| marg_clip
== 2) && y
< marg_t
)
434 if ((curs_y
<= marg_b
|| marg_clip
== 2) && y
> marg_b
)
448 * Save or restore the cursor and SGR mode.
450 static void save_cursor(int save
) {
454 save_attr
= curr_attr
;
456 save_csattr
= cset_attr
[cset
];
460 curr_attr
= save_attr
;
462 cset_attr
[cset
] = save_csattr
;
468 * Erase a large portion of the screen: the whole screen, or the
469 * whole line, or parts thereof.
471 static void erase_lots (int line_only
, int from_begin
, int to_end
) {
472 unsigned long *startpos
, *endpos
;
475 startpos
= cpos
- curs_x
;
476 endpos
= startpos
+ cols
+1;
479 endpos
= startpos
+ rows
* (cols
+1);
485 check_selection (startpos
, endpos
);
486 while (startpos
< endpos
)
487 *startpos
++ = ERASE_CHAR
;
491 * Insert or delete characters within the current line. n is +ve if
492 * insertion is desired, and -ve for deletion.
494 static void insch (int n
) {
495 int dir
= (n
< 0 ?
-1 : +1);
498 n
= (n
< 0 ?
-n
: n
);
499 if (n
> cols
- curs_x
)
501 m
= cols
- curs_x
- n
;
502 check_selection (cpos
, cpos
+n
);
504 memmove (cpos
, cpos
+n
, m
*TSIZE
);
506 cpos
[m
++] = ERASE_CHAR
;
508 memmove (cpos
+n
, cpos
, m
*TSIZE
);
510 cpos
[n
] = ERASE_CHAR
;
515 * Toggle terminal mode `mode' to state `state'. (`query' indicates
516 * whether the mode is a DEC private one or a normal one.)
518 static void toggle_mode (int mode
, int query
, int state
) {
519 if (query
) switch (mode
) {
520 case 1: /* application cursor keys */
521 app_cursor_keys
= state
;
523 case 3: /* 80/132 columns */
525 request_resize (state ?
132 : 80, rows
);
527 case 5: /* reverse video */
529 seen_disp_event
= TRUE
;
531 case 6: /* DEC origin mode */
534 case 7: /* auto wrap */
537 case 47: /* alternate screen */
542 } else switch (mode
) {
543 case 4: /* set insert mode */
550 * Process an OSC sequence: set window title or icon name.
552 static void do_osc(void) {
555 wordness
[(unsigned char)osc_string
[osc_strlen
]] = esc_args
[0];
557 osc_string
[osc_strlen
] = '\0';
558 switch (esc_args
[0]) {
561 set_icon (osc_string
);
562 if (esc_args
[0] == 1)
564 /* fall through: parameter 0 means set both */
567 set_title (osc_string
);
574 * Remove everything currently in `inbuf' and stick it up on the
575 * in-memory display. There's a big state machine in here to
576 * process escape sequences...
578 void term_out(void) {
581 while ( (c
= inbuf_getc()) != -1) {
584 static FILE *fp
= NULL
;
585 if (!fp
) fp
= fopen("putty.log", "wb");
586 if (fp
) fputc (c
, fp
);
589 if( termstate
< DO_CTRLS
&& (c
&0x60) == 0 ) {
591 case '\005': /* terminal type query */
592 ldisc
->send ("PuTTY\r", 6);
599 if (curs_x
== 0 && curs_y
> 0)
600 curs_x
= cols
-1, curs_y
--;
606 seen_disp_event
= TRUE
;
615 termstate
= SEEN_ESC
;
618 termstate
= SEEN_CSI
;
620 esc_args
[0] = ARG_DEFAULT
;
624 termstate
= SEEN_OSC
;
631 seen_disp_event
= TRUE
;
636 if (curs_y
== marg_b
)
637 scroll (marg_t
, marg_b
, 1, TRUE
);
638 else if (curs_y
< rows
-1)
650 } while (curs_x
< cols
-1 && !tabs
[curs_x
]);
654 unsigned long *old_cpos
= cpos
;
656 check_selection (old_cpos
, cpos
);
658 seen_disp_event
= TRUE
;
662 else switch (termstate
) {
664 if (c
>= ' ' && c
!= 0234) {
666 cpos
[1] = ATTR_WRAPPED
;
667 if (curs_y
== marg_b
)
668 scroll (marg_t
, marg_b
, 1, TRUE
);
669 else if (curs_y
< rows
-1)
678 check_selection (cpos
, cpos
+1);
679 *cpos
++ = xlat_tty2scr((unsigned char)c
) | curr_attr
|
680 (c
<= 0x7F ? cset_attr
[cset
] : ATTR_ASCII
);
682 if (curs_x
== cols
) {
692 termstate
= TOPLEVEL
;
696 * This state is virtually identical to SEEN_ESC, with the
697 * exception that we have an OSC sequence in the pipeline,
698 * and _if_ we see a backslash, we process it.
702 termstate
= TOPLEVEL
;
705 /* else fall through */
707 termstate
= TOPLEVEL
;
709 case ' ': /* some weird sequence? */
710 termstate
= IGNORE_NEXT
;
712 case '[': /* enter CSI mode */
713 termstate
= SEEN_CSI
;
715 esc_args
[0] = ARG_DEFAULT
;
718 case ']': /* xterm escape sequences */
719 termstate
= SEEN_OSC
;
722 case '(': /* should set GL */
725 case ')': /* should set GR */
728 case '7': /* save cursor */
731 case '8': /* restore cursor */
733 seen_disp_event
= TRUE
;
736 app_keypad_keys
= TRUE
;
739 app_keypad_keys
= FALSE
;
741 case 'D': /* exactly equivalent to LF */
742 if (curs_y
== marg_b
)
743 scroll (marg_t
, marg_b
, 1, TRUE
);
744 else if (curs_y
< rows
-1)
748 seen_disp_event
= TRUE
;
751 case 'E': /* exactly equivalent to CR-LF */
754 if (curs_y
== marg_b
)
755 scroll (marg_t
, marg_b
, 1, TRUE
);
756 else if (curs_y
< rows
-1)
761 seen_disp_event
= TRUE
;
763 case 'M': /* reverse index - backwards LF */
764 if (curs_y
== marg_t
)
765 scroll (marg_t
, marg_b
, -1, TRUE
);
770 seen_disp_event
= TRUE
;
772 case 'Z': /* terminal type query */
773 ldisc
->send ("\033[?6c", 5);
775 case 'c': /* restore power-on settings */
779 seen_disp_event
= TRUE
;
781 case '#': /* ESC # 8 fills screen with Es :-) */
782 termstate
= SEEN_ESCHASH
;
784 case 'H': /* set a tab */
790 termstate
= TOPLEVEL
; /* default */
792 case '0': case '1': case '2': case '3': case '4':
793 case '5': case '6': case '7': case '8': case '9':
794 if (esc_nargs
<= ARGS_MAX
) {
795 if (esc_args
[esc_nargs
-1] == ARG_DEFAULT
)
796 esc_args
[esc_nargs
-1] = 0;
797 esc_args
[esc_nargs
-1] =
798 10 * esc_args
[esc_nargs
-1] + c
- '0';
800 termstate
= SEEN_CSI
;
803 if (++esc_nargs
<= ARGS_MAX
)
804 esc_args
[esc_nargs
-1] = ARG_DEFAULT
;
805 termstate
= SEEN_CSI
;
809 termstate
= SEEN_CSI
;
811 case 'A': /* move up N lines */
812 move (curs_x
, curs_y
- def(esc_args
[0], 1), 1);
813 seen_disp_event
= TRUE
;
815 case 'B': case 'e': /* move down N lines */
816 move (curs_x
, curs_y
+ def(esc_args
[0], 1), 1);
817 seen_disp_event
= TRUE
;
819 case 'C': case 'a': /* move right N cols */
820 move (curs_x
+ def(esc_args
[0], 1), curs_y
, 1);
821 seen_disp_event
= TRUE
;
823 case 'D': /* move left N cols */
824 move (curs_x
- def(esc_args
[0], 1), curs_y
, 1);
825 seen_disp_event
= TRUE
;
827 case 'E': /* move down N lines and CR */
828 move (0, curs_y
+ def(esc_args
[0], 1), 1);
829 seen_disp_event
= TRUE
;
831 case 'F': /* move up N lines and CR */
832 move (0, curs_y
- def(esc_args
[0], 1), 1);
833 seen_disp_event
= TRUE
;
835 case 'G': case '`': /* set horizontal posn */
836 move (def(esc_args
[0], 1) - 1, curs_y
, 0);
837 seen_disp_event
= TRUE
;
839 case 'd': /* set vertical posn */
840 move (curs_x
, (dec_om ? marg_t
: 0) + def(esc_args
[0], 1) - 1,
842 seen_disp_event
= TRUE
;
844 case 'H': case 'f': /* set horz and vert posns at once */
846 esc_args
[1] = ARG_DEFAULT
;
847 move (def(esc_args
[1], 1) - 1,
848 (dec_om ? marg_t
: 0) + def(esc_args
[0], 1) - 1,
850 seen_disp_event
= TRUE
;
852 case 'J': /* erase screen or parts of it */
854 unsigned int i
= def(esc_args
[0], 0) + 1;
857 erase_lots(FALSE
, !!(i
& 2), !!(i
& 1));
860 seen_disp_event
= TRUE
;
862 case 'K': /* erase line or parts of it */
864 unsigned int i
= def(esc_args
[0], 0) + 1;
867 erase_lots(TRUE
, !!(i
& 2), !!(i
& 1));
869 seen_disp_event
= TRUE
;
871 case 'L': /* insert lines */
872 if (curs_y
<= marg_b
)
873 scroll (curs_y
, marg_b
, -def(esc_args
[0], 1), FALSE
);
874 seen_disp_event
= TRUE
;
876 case 'M': /* delete lines */
877 if (curs_y
<= marg_b
)
878 scroll (curs_y
, marg_b
, def(esc_args
[0], 1), TRUE
);
879 seen_disp_event
= TRUE
;
881 case '@': /* insert chars */
882 insch (def(esc_args
[0], 1));
883 seen_disp_event
= TRUE
;
885 case 'P': /* delete chars */
886 insch (-def(esc_args
[0], 1));
887 seen_disp_event
= TRUE
;
889 case 'c': /* terminal type query */
890 ldisc
->send ("\033[?6c", 5);
892 case 'n': /* cursor position query */
893 if (esc_args
[0] == 6) {
895 sprintf (buf
, "\033[%d;%dR", curs_y
+ 1, curs_x
+ 1);
896 ldisc
->send (buf
, strlen(buf
));
899 case 'h': /* toggle a mode to high */
900 toggle_mode (esc_args
[0], esc_query
, TRUE
);
902 case 'l': /* toggle a mode to low */
903 toggle_mode (esc_args
[0], esc_query
, FALSE
);
905 case 'g': /* clear tabs */
906 if (esc_nargs
== 1) {
907 if (esc_args
[0] == 0) {
908 tabs
[curs_x
] = FALSE
;
909 } else if (esc_args
[0] == 3) {
911 for (i
= 0; i
< cols
; i
++)
916 case 'r': /* set scroll margins */
917 if (!esc_query
&& esc_nargs
<= 2) {
919 top
= def(esc_args
[0], 1) - 1;
922 bot
= (esc_nargs
<= 1 || esc_args
[1] == 0 ? rows
:
923 def(esc_args
[1], rows
)) - 1;
931 * I used to think the cursor should be
932 * placed at the top of the newly marginned
933 * area. Apparently not: VMS TPU falls over
938 seen_disp_event
= TRUE
;
942 case 'm': /* set graphics rendition */
945 for (i
=0; i
<esc_nargs
; i
++) {
946 switch (def(esc_args
[i
], 0)) {
947 case 0: /* restore defaults */
948 curr_attr
= ATTR_DEFAULT
; break;
949 case 1: /* enable bold */
950 curr_attr
|= ATTR_BOLD
; break;
951 case 4: /* enable underline */
952 case 21: /* (enable double underline) */
953 curr_attr
|= ATTR_UNDER
; break;
954 case 7: /* enable reverse video */
955 curr_attr
|= ATTR_REVERSE
; break;
956 case 22: /* disable bold */
957 curr_attr
&= ~ATTR_BOLD
; break;
958 case 24: /* disable underline */
959 curr_attr
&= ~ATTR_UNDER
; break;
960 case 27: /* disable reverse video */
961 curr_attr
&= ~ATTR_REVERSE
; break;
962 case 30: case 31: case 32: case 33:
963 case 34: case 35: case 36: case 37:
965 curr_attr
&= ~ATTR_FGMASK
;
966 curr_attr
|= (esc_args
[i
] - 30) << ATTR_FGSHIFT
;
968 case 39: /* default-foreground */
969 curr_attr
&= ~ATTR_FGMASK
;
970 curr_attr
|= ATTR_DEFFG
;
972 case 40: case 41: case 42: case 43:
973 case 44: case 45: case 46: case 47:
975 curr_attr
&= ~ATTR_BGMASK
;
976 curr_attr
|= (esc_args
[i
] - 40) << ATTR_BGSHIFT
;
978 case 49: /* default-background */
979 curr_attr
&= ~ATTR_BGMASK
;
980 curr_attr
|= ATTR_DEFBG
;
986 case 's': /* save cursor */
989 case 'u': /* restore cursor */
991 seen_disp_event
= TRUE
;
993 case 't': /* set page size - ie window height */
994 request_resize (cols
, def(esc_args
[0], 24));
997 case 'X': /* write N spaces w/o moving cursor */
999 int n
= def(esc_args
[0], 1);
1000 unsigned long *p
= cpos
;
1001 if (n
> cols
- curs_x
)
1003 check_selection (cpos
, cpos
+n
);
1006 seen_disp_event
= TRUE
;
1009 case 'x': /* report terminal characteristics */
1012 int i
= def(esc_args
[0], 0);
1013 if (i
== 0 || i
== 1) {
1014 strcpy (buf
, "\033[2;1;1;112;112;1;0x");
1016 ldisc
->send (buf
, 20);
1026 cset_attr
[termstate
== SET_GL ?
0 : 1] = ATTR_GBCHR
;
1029 cset_attr
[termstate
== SET_GL ?
0 : 1] = ATTR_LINEDRW
;
1031 default: /* specifically, 'B' */
1032 cset_attr
[termstate
== SET_GL ?
0 : 1] = ATTR_ASCII
;
1035 termstate
= TOPLEVEL
;
1040 case 'P': /* Linux palette sequence */
1041 termstate
= SEEN_OSC_P
;
1044 case 'R': /* Linux palette reset */
1047 termstate
= TOPLEVEL
;
1049 case 'W': /* word-set */
1050 termstate
= SEEN_OSC_W
;
1053 case '0': case '1': case '2': case '3': case '4':
1054 case '5': case '6': case '7': case '8': case '9':
1055 esc_args
[0] = 10 * esc_args
[0] + c
- '0';
1059 * Grotty hack to support xterm and DECterm title
1060 * sequences concurrently.
1062 if (esc_args
[0] == 2) {
1066 /* else fall through */
1068 termstate
= OSC_STRING
;
1073 if (c
== 0234 || c
== '\007') {
1075 * These characters terminate the string; ST and BEL
1076 * terminate the sequence and trigger instant
1077 * processing of it, whereas ESC goes back to SEEN_ESC
1078 * mode unless it is followed by \, in which case it is
1079 * synonymous with ST in the first place.
1082 termstate
= TOPLEVEL
;
1083 } else if (c
== '\033')
1084 termstate
= OSC_MAYBE_ST
;
1085 else if (osc_strlen
< OSC_STR_MAX
)
1086 osc_string
[osc_strlen
++] = c
;
1090 int max
= (osc_strlen
== 0 ?
21 : 16);
1092 if (c
>= '0' && c
<= '9')
1094 else if (c
>= 'A' && c
<= 'A'+max
-10)
1096 else if (c
>= 'a' && c
<= 'a'+max
-10)
1099 termstate
= TOPLEVEL
;
1100 osc_string
[osc_strlen
++] = val
;
1101 if (osc_strlen
>= 7) {
1102 palette_set (osc_string
[0],
1103 osc_string
[1] * 16 + osc_string
[2],
1104 osc_string
[3] * 16 + osc_string
[4],
1105 osc_string
[5] * 16 + osc_string
[6]);
1107 termstate
= TOPLEVEL
;
1113 case '0': case '1': case '2': case '3': case '4':
1114 case '5': case '6': case '7': case '8': case '9':
1115 esc_args
[0] = 10 * esc_args
[0] + c
- '0';
1118 termstate
= OSC_STRING
;
1124 unsigned long *p
= scrtop
;
1125 int n
= rows
* (cols
+1);
1127 *p
++ = ATTR_DEFAULT
| 'E';
1129 seen_disp_event
= TRUE
;
1130 check_selection (scrtop
, scrtop
+ rows
* (cols
+1));
1132 termstate
= TOPLEVEL
;
1135 check_selection (cpos
, cpos
+1);
1138 if (nl_count
> MAXNL
)
1143 * Compare two lines to determine whether they are sufficiently
1144 * alike to scroll-optimise one to the other. Return the degree of
1147 static int linecmp (unsigned long *a
, unsigned long *b
) {
1150 for (i
=n
=0; i
< cols
; i
++)
1151 n
+= (*a
++ == *b
++);
1156 * Given a context, update the window. Out of paranoia, we don't
1157 * allow WM_PAINT responses to do scrolling optimisations.
1159 static void do_paint (Context ctx
, int may_optimise
){
1160 int i
, j
, start
, our_curs_y
;
1161 unsigned long attr
, rv
, cursor
;
1164 cursor
= (has_focus ? ATTR_ACTCURS
: ATTR_PASCURS
);
1165 rv
= (rvideo ? ATTR_REVERSE
: 0);
1166 our_curs_y
= curs_y
+ (scrtop
- disptop
) / (cols
+1);
1168 for (i
=0; i
<rows
; i
++) {
1169 int idx
= i
*(cols
+1);
1170 for (j
=0; j
<=cols
; j
++,idx
++) {
1171 unsigned long *d
= disptop
+idx
;
1172 wanttext
[idx
] = ((*d
^ rv
1173 ^ (selstart
<= d
&& d
< selend ?
1174 ATTR_REVERSE
: 0)) |
1175 (i
==our_curs_y
&& j
==curs_x ? cursor
: 0));
1180 * We would perform scrolling optimisations in here, if they
1181 * didn't have a nasty tendency to cause the whole sodding
1182 * program to hang for a second at speed-critical moments.
1183 * We'll leave it well alone...
1186 for (i
=0; i
<rows
; i
++) {
1187 int idx
= i
*(cols
+1);
1189 for (j
=0; j
<=cols
; j
++,idx
++) {
1190 unsigned long t
= wanttext
[idx
];
1191 int needs_update
= (j
< cols
&& t
!= disptext
[idx
]);
1192 int keep_going
= (start
!= -1 && needs_update
&&
1193 (t
& ATTR_MASK
) == attr
&&
1194 j
-start
< sizeof(ch
));
1195 if (start
!= -1 && !keep_going
) {
1196 do_text (ctx
, start
, i
, ch
, j
-start
, attr
);
1202 attr
= t
& ATTR_MASK
;
1204 ch
[j
-start
] = (char) (t
& CHAR_MASK
);
1212 * Invalidate the whole screen so it will be repainted in full.
1214 void term_invalidate(void) {
1217 for (i
=0; i
<rows
*(cols
+1); i
++)
1218 disptext
[i
] = ATTR_INVALID
;
1222 * Paint the window in response to a WM_PAINT message.
1224 void term_paint (Context ctx
, int l
, int t
, int r
, int b
) {
1225 int i
, j
, left
, top
, right
, bottom
;
1227 left
= l
/ font_width
;
1228 right
= (r
- 1) / font_width
;
1229 top
= t
/ font_height
;
1230 bottom
= (b
- 1) / font_height
;
1231 for (i
= top
; i
<= bottom
&& i
< rows
; i
++)
1232 for (j
= left
; j
<= right
&& j
< cols
; j
++)
1233 disptext
[i
*(cols
+1)+j
] = ATTR_INVALID
;
1235 do_paint (ctx
, FALSE
);
1239 * Attempt to scroll the scrollback. The second parameter gives the
1240 * position we want to scroll to; the first is +1 to denote that
1241 * this position is relative to the beginning of the scrollback, -1
1242 * to denote it is relative to the end, and 0 to denote that it is
1243 * relative to the current position.
1245 void term_scroll (int rel
, int where
) {
1246 int n
= where
* (cols
+1);
1248 disptop
= (rel
< 0 ? scrtop
:
1249 rel
> 0 ? sbtop
: disptop
) + n
;
1250 if (disptop
< sbtop
)
1252 if (disptop
> scrtop
)
1259 * Spread the selection outwards according to the selection mode.
1261 static unsigned long *sel_spread_half (unsigned long *p
, int dir
) {
1262 unsigned long *linestart
, *lineend
;
1266 x
= (p
- text
) % (cols
+1);
1268 lineend
= linestart
+ cols
;
1273 * In this mode, every character is a separate unit, except
1274 * for runs of spaces at the end of a non-wrapping line.
1276 if (!(linestart
[cols
] & ATTR_WRAPPED
)) {
1277 unsigned long *q
= lineend
;
1278 while (q
> linestart
&& (q
[-1] & CHAR_MASK
) == 0x20)
1283 p
= (dir
== -1 ? q
: lineend
- 1);
1288 * In this mode, the units are maximal runs of characters
1289 * whose `wordness' has the same value.
1291 wvalue
= wordness
[*p
& CHAR_MASK
];
1293 while (p
< lineend
&& wordness
[p
[1] & CHAR_MASK
] == wvalue
)
1296 while (p
> linestart
&& wordness
[p
[-1] & CHAR_MASK
] == wvalue
)
1302 * In this mode, every line is a unit.
1304 p
= (dir
== -1 ? linestart
: lineend
- 1);
1310 static void sel_spread (void) {
1311 selstart
= sel_spread_half (selstart
, -1);
1312 selend
= sel_spread_half (selend
- 1, +1) + 1;
1315 void term_mouse (Mouse_Button b
, Mouse_Action a
, int x
, int y
) {
1316 unsigned long *selpoint
;
1319 if (y
>=rows
) y
= rows
-1;
1327 if (x
>=cols
) x
= cols
-1;
1329 selpoint
= disptop
+ y
* (cols
+1) + x
;
1331 if (b
== MB_SELECT
&& a
== MA_CLICK
) {
1333 selstate
= ABOUT_TO
;
1334 selanchor
= selpoint
;
1336 } else if (b
== MB_SELECT
&& (a
== MA_2CLK
|| a
== MA_3CLK
)) {
1338 selmode
= (a
== MA_2CLK ? SM_WORD
: SM_LINE
);
1339 selstate
= DRAGGING
;
1340 selstart
= selanchor
= selpoint
;
1341 selend
= selstart
+ 1;
1343 } else if ((b
== MB_SELECT
&& a
== MA_DRAG
) ||
1344 (b
== MB_EXTEND
&& a
!= MA_RELEASE
)) {
1345 if (selstate
== ABOUT_TO
&& selanchor
== selpoint
)
1347 if (b
== MB_EXTEND
&& a
!= MA_DRAG
&& selstate
== SELECTED
) {
1348 if (selpoint
-selstart
< (selend
-selstart
)/2)
1349 selanchor
= selend
- 1;
1351 selanchor
= selstart
;
1352 selstate
= DRAGGING
;
1354 if (selstate
!= ABOUT_TO
&& selstate
!= DRAGGING
)
1355 selanchor
= selpoint
;
1356 selstate
= DRAGGING
;
1357 if (selpoint
< selanchor
) {
1358 selstart
= selpoint
;
1359 selend
= selanchor
+ 1;
1361 selstart
= selanchor
;
1362 selend
= selpoint
+ 1;
1365 } else if ((b
== MB_SELECT
|| b
== MB_EXTEND
) && a
== MA_RELEASE
) {
1366 if (selstate
== DRAGGING
) {
1368 * We've completed a selection. We now transfer the
1369 * data to the clipboard.
1371 unsigned char *p
= selspace
;
1372 unsigned long *q
= selstart
;
1374 while (q
< selend
) {
1376 unsigned long *lineend
= q
- (q
-text
) % (cols
+1) + cols
;
1377 unsigned long *nlpos
= lineend
;
1379 if (!(*nlpos
& ATTR_WRAPPED
)) {
1380 while ((nlpos
[-1] & CHAR_MASK
) == 0x20 && nlpos
> q
)
1385 while (q
< nlpos
&& q
< selend
)
1386 *p
++ = (unsigned char) (*q
++ & CHAR_MASK
);
1389 for (i
=0; i
<sizeof(sel_nl
); i
++)
1392 q
= lineend
+ 1; /* start of next line */
1394 write_clip (selspace
, p
- selspace
);
1395 selstate
= SELECTED
;
1397 selstate
= NO_SELECTION
;
1398 } else if (b
== MB_PASTE
&& (a
==MA_CLICK
|| a
==MA_2CLK
|| a
==MA_3CLK
)) {
1402 get_clip((void **) &data
, &len
);
1406 while (p
< data
+len
) {
1407 while (p
< data
+len
&&
1408 !(p
<= data
+len
-sizeof(sel_nl
) &&
1409 !memcmp(p
, sel_nl
, sizeof(sel_nl
))))
1417 c
=xlat_kbd2tty(q
[i
]);
1422 if (p
<= data
+len
-sizeof(sel_nl
) &&
1423 !memcmp(p
, sel_nl
, sizeof(sel_nl
))) {
1424 ldisc
->send ("\r", 1);
1425 p
+= sizeof(sel_nl
);
1430 get_clip(NULL
, NULL
);
1436 static void deselect (void) {
1437 selstate
= NO_SELECTION
;
1438 selstart
= selend
= scrtop
;
1441 void term_deselect (void) {