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_query
&& 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) {