14 #define poslt(p1,p2) ( (p1).y < (p2).y || ( (p1).y == (p2).y && (p1).x < (p2).x ) )
15 #define posle(p1,p2) ( (p1).y < (p2).y || ( (p1).y == (p2).y && (p1).x <= (p2).x ) )
16 #define poseq(p1,p2) ( (p1).y == (p2).y && (p1).x == (p2).x )
17 #define posdiff(p1,p2) ( ((p1).y - (p2).y) * (term->cols+1) + (p1).x - (p2).x )
19 /* Product-order comparisons for rectangular block selection. */
20 #define posPlt(p1,p2) ( (p1).y <= (p2).y && (p1).x < (p2).x )
21 #define posPle(p1,p2) ( (p1).y <= (p2).y && (p1).x <= (p2).x )
23 #define incpos(p) ( (p).x == term->cols ? ((p).x = 0, (p).y++, 1) : ((p).x++, 0) )
24 #define decpos(p) ( (p).x == 0 ? ((p).x = term->cols, (p).y--, 1) : ((p).x--, 0) )
28 #define CL_ANSIMIN 0x0001 /* Codes in all ANSI like terminals. */
29 #define CL_VT100 0x0002 /* VT100 */
30 #define CL_VT100AVO 0x0004 /* VT100 +AVO; 132x24 (not 132x14) & attrs */
31 #define CL_VT102 0x0008 /* VT102 */
32 #define CL_VT220 0x0010 /* VT220 */
33 #define CL_VT320 0x0020 /* VT320 */
34 #define CL_VT420 0x0040 /* VT420 */
35 #define CL_VT510 0x0080 /* VT510, NB VT510 includes ANSI */
36 #define CL_VT340TEXT 0x0100 /* VT340 extensions that appear in the VT420 */
37 #define CL_SCOANSI 0x1000 /* SCOANSI not in ANSIMIN. */
38 #define CL_ANSI 0x2000 /* ANSI ECMA-48 not in the VT100..VT420 */
39 #define CL_OTHER 0x4000 /* Others, Xterm, linux, putty, dunno, etc */
41 #define TM_VT100 (CL_ANSIMIN|CL_VT100)
42 #define TM_VT100AVO (TM_VT100|CL_VT100AVO)
43 #define TM_VT102 (TM_VT100AVO|CL_VT102)
44 #define TM_VT220 (TM_VT102|CL_VT220)
45 #define TM_VTXXX (TM_VT220|CL_VT340TEXT|CL_VT510|CL_VT420|CL_VT320)
46 #define TM_SCOANSI (CL_ANSIMIN|CL_SCOANSI)
48 #define TM_PUTTY (0xFFFF)
50 #define UPDATE_DELAY ((TICKSPERSEC+49)/50)/* ticks to defer window update */
51 #define TBLINK_DELAY ((TICKSPERSEC*9+19)/20)/* ticks between text blinks*/
52 #define CBLINK_DELAY (CURSORBLINK) /* ticks between cursor blinks */
53 #define VBELL_DELAY (VBELL_TIMEOUT) /* visual bell timeout in ticks */
55 #define compatibility(x) \
56 if ( ((CL_##x)&term->compatibility_level) == 0 ) { \
57 term->termstate=TOPLEVEL; \
60 #define compatibility2(x,y) \
61 if ( ((CL_##x|CL_##y)&term->compatibility_level) == 0 ) { \
62 term->termstate=TOPLEVEL; \
66 #define has_compat(x) ( ((CL_##x)&term->compatibility_level) != 0 )
68 char *EMPTY_WINDOW_TITLE = "";
70 const char sco2ansicolour[] = { 0, 4, 2, 6, 1, 5, 3, 7 };
72 #define sel_nl_sz (sizeof(sel_nl)/sizeof(wchar_t))
73 const wchar_t sel_nl[] = SEL_NL;
76 * Fetch the character at a particular position in a line array,
77 * for purposes of `wordtype'. The reason this isn't just a simple
78 * array reference is that if the character we find is UCSWIDE,
79 * then we must look one space further to the left.
81 #define UCSGET(a, x) \
82 ( (x)>0 && (a)[(x)].chr == UCSWIDE ? (a)[(x)-1].chr : (a)[(x)].chr )
85 * Detect the various aliases of U+0020 SPACE.
87 #define IS_SPACE_CHR(chr) \
88 ((chr) == 0x20 || (DIRECT_CHAR(chr) && ((chr) & 0xFF) == 0x20))
93 #define CSET_OF(chr) (DIRECT_CHAR(chr)||DIRECT_FONT(chr) ? (chr)&CSET_MASK : 0)
96 * Internal prototypes.
98 static void resizeline(Terminal *, termline *, int);
99 static termline *lineptr(Terminal *, int, int, int);
100 static void unlineptr(termline *);
101 static void do_paint(Terminal *, Context, int);
102 static void erase_lots(Terminal *, int, int, int);
103 static int find_last_nonempty_line(Terminal *, tree234 *);
104 static void swap_screen(Terminal *, int, int, int);
105 static void update_sbar(Terminal *);
106 static void deselect(Terminal *);
107 static void term_print_finish(Terminal *);
108 static void scroll(Terminal *, int, int, int, int);
109 #ifdef OPTIMISE_SCROLL
110 static void scroll_display(Terminal *, int, int, int);
111 #endif /* OPTIMISE_SCROLL */
113 static termline *newline(Terminal *term, int cols, int bce)
118 line = snew(termline);
119 line->chars = snewn(cols, termchar);
120 for (j = 0; j < cols; j++)
121 line->chars[j] = (bce ? term->erase_char : term->basic_erase_char);
122 line->cols = line->size = cols;
123 line->lattr = LATTR_NORM;
124 line->temporary = FALSE;
130 static void freeline(termline *line)
138 static void unlineptr(termline *line)
146 * Diagnostic function: verify that a termline has a correct
147 * combining character structure.
149 * This is a performance-intensive check, so it's no longer enabled
152 static void cc_check(termline *line)
154 unsigned char *flags;
157 assert(line->size >= line->cols);
159 flags = snewn(line->size, unsigned char);
161 for (i = 0; i < line->size; i++)
162 flags[i] = (i < line->cols);
164 for (i = 0; i < line->cols; i++) {
166 while (line->chars[j].cc_next) {
167 j += line->chars[j].cc_next;
168 assert(j >= line->cols && j < line->size);
177 assert(j >= line->cols && j < line->size);
180 if (line->chars[j].cc_next)
181 j += line->chars[j].cc_next;
188 for (i = 0; i < line->size; i++)
189 j += (flags[i] != 0);
191 assert(j == line->size);
198 * Add a combining character to a character cell.
200 static void add_cc(termline *line, int col, unsigned long chr)
204 assert(col >= 0 && col < line->cols);
207 * Start by extending the cols array if the free list is empty.
209 if (!line->cc_free) {
211 line->size += 16 + (line->size - line->cols) / 2;
212 line->chars = sresize(line->chars, line->size, termchar);
214 while (n < line->size) {
215 if (n+1 < line->size)
216 line->chars[n].cc_next = 1;
218 line->chars[n].cc_next = 0;
224 * Now walk the cc list of the cell in question.
226 while (line->chars[col].cc_next)
227 col += line->chars[col].cc_next;
230 * `col' now points at the last cc currently in this cell; so
231 * we simply add another one.
233 newcc = line->cc_free;
234 if (line->chars[newcc].cc_next)
235 line->cc_free = newcc + line->chars[newcc].cc_next;
238 line->chars[newcc].cc_next = 0;
239 line->chars[newcc].chr = chr;
240 line->chars[col].cc_next = newcc - col;
248 * Clear the combining character list in a character cell.
250 static void clear_cc(termline *line, int col)
252 int oldfree, origcol = col;
254 assert(col >= 0 && col < line->cols);
256 if (!line->chars[col].cc_next)
257 return; /* nothing needs doing */
259 oldfree = line->cc_free;
260 line->cc_free = col + line->chars[col].cc_next;
261 while (line->chars[col].cc_next)
262 col += line->chars[col].cc_next;
264 line->chars[col].cc_next = oldfree - col;
266 line->chars[col].cc_next = 0;
268 line->chars[origcol].cc_next = 0;
276 * Compare two character cells for equality. Special case required
277 * in do_paint() where we override what we expect the chr and attr
280 static int termchars_equal_override(termchar *a, termchar *b,
281 unsigned long bchr, unsigned long battr)
286 if ((a->attr &~ DATTR_MASK) != (battr &~ DATTR_MASK))
288 while (a->cc_next || b->cc_next) {
289 if (!a->cc_next || !b->cc_next)
290 return FALSE; /* one cc-list ends, other does not */
293 if (a->chr != b->chr)
299 static int termchars_equal(termchar *a, termchar *b)
301 return termchars_equal_override(a, b, b->chr, b->attr);
305 * Copy a character cell. (Requires a pointer to the destination
306 * termline, so as to access its free list.)
308 static void copy_termchar(termline *destline, int x, termchar *src)
310 clear_cc(destline, x);
312 destline->chars[x] = *src; /* copy everything except cc-list */
313 destline->chars[x].cc_next = 0; /* and make sure this is zero */
315 while (src->cc_next) {
317 add_cc(destline, x, src->chr);
326 * Move a character cell within its termline.
328 static void move_termchar(termline *line, termchar *dest, termchar *src)
330 /* First clear the cc list from the original char, just in case. */
331 clear_cc(line, dest - line->chars);
333 /* Move the character cell and adjust its cc_next. */
334 *dest = *src; /* copy everything except cc-list */
336 dest->cc_next = src->cc_next - (dest-src);
338 /* Ensure the original cell doesn't have a cc list. */
347 * Compress and decompress a termline into an RLE-based format for
348 * storing in scrollback. (Since scrollback almost never needs to
349 * be modified and exists in huge quantities, this is a sensible
350 * tradeoff, particularly since it allows us to continue adding
351 * features to the main termchar structure without proportionally
352 * bloating the terminal emulator's memory footprint unless those
353 * features are in constant use.)
359 static void add(struct buf *b, unsigned char c)
361 if (b->len >= b->size) {
362 b->size = (b->len * 3 / 2) + 512;
363 b->data = sresize(b->data, b->size, unsigned char);
365 b->data[b->len++] = c;
367 static int get(struct buf *b)
369 return b->data[b->len++];
371 static void makerle(struct buf *b, termline *ldata,
372 void (*makeliteral)(struct buf *b, termchar *c,
373 unsigned long *state))
375 int hdrpos, hdrsize, n, prevlen, prevpos, thislen, thispos, prev2;
376 termchar *c = ldata->chars;
377 unsigned long state = 0, oldstate;
384 prevlen = prevpos = 0;
389 makeliteral(b, c++, &state);
390 thislen = b->len - thispos;
391 if (thislen == prevlen &&
392 !memcmp(b->data + prevpos, b->data + thispos, thislen)) {
394 * This literal precisely matches the previous one.
395 * Turn it into a run if it's worthwhile.
397 * With one-byte literals, it costs us two bytes to
398 * encode a run, plus another byte to write the header
399 * to resume normal output; so a three-element run is
400 * neutral, and anything beyond that is unconditionally
401 * worthwhile. With two-byte literals or more, even a
404 if (thislen > 1 || prev2) {
408 * It's worth encoding a run. Start at prevpos,
409 * unless hdrsize==0 in which case we can back up
410 * another one and start by overwriting hdrpos.
413 hdrsize--; /* remove the literal at prevpos */
417 prevpos -= prevlen;/* and possibly another one */
421 assert(prevpos == hdrpos + 1);
423 b->len = prevpos+prevlen;
425 memmove(b->data + prevpos+1, b->data + prevpos, prevlen);
427 b->len = prevpos+prevlen+1;
429 * Terminate the previous run of ordinary
432 assert(hdrsize >= 1 && hdrsize <= 128);
433 b->data[hdrpos] = hdrsize - 1;
436 runlen = prev2 ? 3 : 2;
438 while (n > 0 && runlen < 129) {
442 makeliteral(b, c, &state);
443 tmplen = b->len - tmppos;
445 if (tmplen != thislen ||
446 memcmp(b->data + runpos+1, b->data + tmppos, tmplen)) {
448 break; /* run over */
453 assert(runlen >= 2 && runlen <= 129);
454 b->data[runpos] = runlen + 0x80 - 2;
459 /* And ensure this run doesn't interfere with the next. */
460 prevlen = prevpos = 0;
466 * Just flag that the previous two literals were
467 * identical, in case we find a third identical one
468 * we want to turn into a run.
481 * This character isn't (yet) part of a run. Add it to
485 if (hdrsize == 128) {
486 b->data[hdrpos] = hdrsize - 1;
490 prevlen = prevpos = 0;
499 assert(hdrsize <= 128);
500 b->data[hdrpos] = hdrsize - 1;
505 static void makeliteral_chr(struct buf *b, termchar *c, unsigned long *state)
508 * My encoding for characters is UTF-8-like, in that it stores
509 * 7-bit ASCII in one byte and uses high-bit-set bytes as
510 * introducers to indicate a longer sequence. However, it's
511 * unlike UTF-8 in that it doesn't need to be able to
512 * resynchronise, and therefore I don't want to waste two bits
513 * per byte on having recognisable continuation characters.
514 * Also I don't want to rule out the possibility that I may one
515 * day use values 0x80000000-0xFFFFFFFF for interesting
516 * purposes, so unlike UTF-8 I need a full 32-bit range.
517 * Accordingly, here is my encoding:
519 * 00000000-0000007F: 0xxxxxxx (but see below)
520 * 00000080-00003FFF: 10xxxxxx xxxxxxxx
521 * 00004000-001FFFFF: 110xxxxx xxxxxxxx xxxxxxxx
522 * 00200000-0FFFFFFF: 1110xxxx xxxxxxxx xxxxxxxx xxxxxxxx
523 * 10000000-FFFFFFFF: 11110ZZZ xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx
525 * (`Z' is like `x' but is always going to be zero since the
526 * values I'm encoding don't go above 2^32. In principle the
527 * five-byte form of the encoding could extend to 2^35, and
528 * there could be six-, seven-, eight- and nine-byte forms as
529 * well to allow up to 64-bit values to be encoded. But that's
530 * completely unnecessary for these purposes!)
532 * The encoding as written above would be very simple, except
533 * that 7-bit ASCII can occur in several different ways in the
534 * terminal data; sometimes it crops up in the D800 page
535 * (CSET_ASCII) but at other times it's in the 0000 page (real
536 * Unicode). Therefore, this encoding is actually _stateful_:
537 * the one-byte encoding of 00-7F actually indicates `reuse the
538 * upper three bytes of the last character', and to encode an
539 * absolute value of 00-7F you need to use the two-byte form
542 if ((c->chr & ~0x7F) == *state) {
543 add(b, (unsigned char)(c->chr & 0x7F));
544 } else if (c->chr < 0x4000) {
545 add(b, (unsigned char)(((c->chr >> 8) & 0x3F) | 0x80));
546 add(b, (unsigned char)(c->chr & 0xFF));
547 } else if (c->chr < 0x200000) {
548 add(b, (unsigned char)(((c->chr >> 16) & 0x1F) | 0xC0));
549 add(b, (unsigned char)((c->chr >> 8) & 0xFF));
550 add(b, (unsigned char)(c->chr & 0xFF));
551 } else if (c->chr < 0x10000000) {
552 add(b, (unsigned char)(((c->chr >> 24) & 0x0F) | 0xE0));
553 add(b, (unsigned char)((c->chr >> 16) & 0xFF));
554 add(b, (unsigned char)((c->chr >> 8) & 0xFF));
555 add(b, (unsigned char)(c->chr & 0xFF));
558 add(b, (unsigned char)((c->chr >> 24) & 0xFF));
559 add(b, (unsigned char)((c->chr >> 16) & 0xFF));
560 add(b, (unsigned char)((c->chr >> 8) & 0xFF));
561 add(b, (unsigned char)(c->chr & 0xFF));
563 *state = c->chr & ~0xFF;
565 static void makeliteral_attr(struct buf *b, termchar *c, unsigned long *state)
568 * My encoding for attributes is 16-bit-granular and assumes
569 * that the top bit of the word is never required. I either
570 * store a two-byte value with the top bit clear (indicating
571 * just that value), or a four-byte value with the top bit set
572 * (indicating the same value with its top bit clear).
574 * However, first I permute the bits of the attribute value, so
575 * that the eight bits of colour (four in each of fg and bg)
576 * which are never non-zero unless xterm 256-colour mode is in
577 * use are placed higher up the word than everything else. This
578 * ensures that attribute values remain 16-bit _unless_ the
579 * user uses extended colour.
581 unsigned attr, colourbits;
585 assert(ATTR_BGSHIFT > ATTR_FGSHIFT);
587 colourbits = (attr >> (ATTR_BGSHIFT + 4)) & 0xF;
589 colourbits |= (attr >> (ATTR_FGSHIFT + 4)) & 0xF;
591 attr = (((attr >> (ATTR_BGSHIFT + 8)) << (ATTR_BGSHIFT + 4)) |
592 (attr & ((1 << (ATTR_BGSHIFT + 4))-1)));
593 attr = (((attr >> (ATTR_FGSHIFT + 8)) << (ATTR_FGSHIFT + 4)) |
594 (attr & ((1 << (ATTR_FGSHIFT + 4))-1)));
596 attr |= (colourbits << (32-9));
599 add(b, (unsigned char)((attr >> 8) & 0xFF));
600 add(b, (unsigned char)(attr & 0xFF));
602 add(b, (unsigned char)(((attr >> 24) & 0x7F) | 0x80));
603 add(b, (unsigned char)((attr >> 16) & 0xFF));
604 add(b, (unsigned char)((attr >> 8) & 0xFF));
605 add(b, (unsigned char)(attr & 0xFF));
608 static void makeliteral_cc(struct buf *b, termchar *c, unsigned long *state)
611 * For combining characters, I just encode a bunch of ordinary
612 * chars using makeliteral_chr, and terminate with a \0
613 * character (which I know won't come up as a combining char
616 * I don't use the stateful encoding in makeliteral_chr.
618 unsigned long zstate;
627 makeliteral_chr(b, c, &zstate);
632 makeliteral_chr(b, &z, &zstate);
635 static termline *decompressline(unsigned char *data, int *bytes_used);
637 static unsigned char *compressline(termline *ldata)
639 struct buf buffer = { NULL, 0, 0 }, *b = &buffer;
642 * First, store the column count, 7 bits at a time, least
643 * significant `digit' first, with the high bit set on all but
649 add(b, (unsigned char)((n & 0x7F) | 0x80));
652 add(b, (unsigned char)(n));
656 * Next store the lattrs; same principle.
659 int n = ldata->lattr;
661 add(b, (unsigned char)((n & 0x7F) | 0x80));
664 add(b, (unsigned char)(n));
668 * Now we store a sequence of separate run-length encoded
669 * fragments, each containing exactly as many symbols as there
670 * are columns in the ldata.
672 * All of these have a common basic format:
674 * - a byte 00-7F indicates that X+1 literals follow it
675 * - a byte 80-FF indicates that a single literal follows it
676 * and expects to be repeated (X-0x80)+2 times.
678 * The format of the `literals' varies between the fragments.
680 makerle(b, ldata, makeliteral_chr);
681 makerle(b, ldata, makeliteral_attr);
682 makerle(b, ldata, makeliteral_cc);
685 * Diagnostics: ensure that the compressed data really does
686 * decompress to the right thing.
688 * This is a bit performance-heavy for production code.
691 #ifndef CHECK_SB_COMPRESSION
697 #ifdef DIAGNOSTIC_SB_COMPRESSION
698 for (i = 0; i < b->len; i++) {
699 printf(" %02x ", b->data[i]);
704 dcl = decompressline(b->data, &dused);
705 assert(b->len == dused);
706 assert(ldata->cols == dcl->cols);
707 assert(ldata->lattr == dcl->lattr);
708 for (i = 0; i < ldata->cols; i++)
709 assert(termchars_equal(&ldata->chars[i], &dcl->chars[i]));
711 #ifdef DIAGNOSTIC_SB_COMPRESSION
712 printf("%d cols (%d bytes) -> %d bytes (factor of %g)\n",
713 ldata->cols, 4 * ldata->cols, dused,
714 (double)dused / (4 * ldata->cols));
720 #endif /* TERM_CC_DIAGS */
723 * Trim the allocated memory so we don't waste any, and return.
725 return sresize(b->data, b->len, unsigned char);
728 static void readrle(struct buf *b, termline *ldata,
729 void (*readliteral)(struct buf *b, termchar *c,
730 termline *ldata, unsigned long *state))
733 unsigned long state = 0;
735 while (n < ldata->cols) {
741 int pos = b->len, count = hdr + 2 - 0x80;
743 assert(n < ldata->cols);
745 readliteral(b, ldata->chars + n, ldata, &state);
749 /* Just a sequence of consecutive literals. */
753 assert(n < ldata->cols);
754 readliteral(b, ldata->chars + n, ldata, &state);
760 assert(n == ldata->cols);
762 static void readliteral_chr(struct buf *b, termchar *c, termline *ldata,
763 unsigned long *state)
768 * 00000000-0000007F: 0xxxxxxx
769 * 00000080-00003FFF: 10xxxxxx xxxxxxxx
770 * 00004000-001FFFFF: 110xxxxx xxxxxxxx xxxxxxxx
771 * 00200000-0FFFFFFF: 1110xxxx xxxxxxxx xxxxxxxx xxxxxxxx
772 * 10000000-FFFFFFFF: 11110ZZZ xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx
777 c->chr = byte | *state;
778 } else if (byte < 0xC0) {
779 c->chr = (byte &~ 0xC0) << 8;
781 } else if (byte < 0xE0) {
782 c->chr = (byte &~ 0xE0) << 16;
783 c->chr |= get(b) << 8;
785 } else if (byte < 0xF0) {
786 c->chr = (byte &~ 0xF0) << 24;
787 c->chr |= get(b) << 16;
788 c->chr |= get(b) << 8;
791 assert(byte == 0xF0);
792 c->chr = get(b) << 24;
793 c->chr |= get(b) << 16;
794 c->chr |= get(b) << 8;
797 *state = c->chr & ~0xFF;
799 static void readliteral_attr(struct buf *b, termchar *c, termline *ldata,
800 unsigned long *state)
802 unsigned val, attr, colourbits;
814 colourbits = (val >> (32-9)) & 0xFF;
815 attr = (val & ((1<<(32-9))-1));
817 attr = (((attr >> (ATTR_FGSHIFT + 4)) << (ATTR_FGSHIFT + 8)) |
818 (attr & ((1 << (ATTR_FGSHIFT + 4))-1)));
819 attr = (((attr >> (ATTR_BGSHIFT + 4)) << (ATTR_BGSHIFT + 8)) |
820 (attr & ((1 << (ATTR_BGSHIFT + 4))-1)));
822 attr |= (colourbits >> 4) << (ATTR_BGSHIFT + 4);
823 attr |= (colourbits & 0xF) << (ATTR_FGSHIFT + 4);
827 static void readliteral_cc(struct buf *b, termchar *c, termline *ldata,
828 unsigned long *state)
831 unsigned long zstate;
832 int x = c - ldata->chars;
838 readliteral_chr(b, &n, ldata, &zstate);
841 add_cc(ldata, x, n.chr);
845 static termline *decompressline(unsigned char *data, int *bytes_used)
847 int ncols, byte, shift;
848 struct buf buffer, *b = &buffer;
855 * First read in the column count.
860 ncols |= (byte & 0x7F) << shift;
862 } while (byte & 0x80);
865 * Now create the output termline.
867 ldata = snew(termline);
868 ldata->chars = snewn(ncols, termchar);
869 ldata->cols = ldata->size = ncols;
870 ldata->temporary = TRUE;
874 * We must set all the cc pointers in ldata->chars to 0 right
875 * now, so that cc diagnostics that verify the integrity of the
876 * whole line will make sense while we're in the middle of
881 for (i = 0; i < ldata->cols; i++)
882 ldata->chars[i].cc_next = 0;
886 * Now read in the lattr.
888 ldata->lattr = shift = 0;
891 ldata->lattr |= (byte & 0x7F) << shift;
893 } while (byte & 0x80);
896 * Now we read in each of the RLE streams in turn.
898 readrle(b, ldata, readliteral_chr);
899 readrle(b, ldata, readliteral_attr);
900 readrle(b, ldata, readliteral_cc);
902 /* Return the number of bytes read, for diagnostic purposes. */
904 *bytes_used = b->len;
910 * Resize a line to make it `cols' columns wide.
912 static void resizeline(Terminal *term, termline *line, int cols)
916 if (line->cols != cols) {
918 oldcols = line->cols;
921 * This line is the wrong length, which probably means it
922 * hasn't been accessed since a resize. Resize it now.
924 * First, go through all the characters that will be thrown
925 * out in the resize (if we're shrinking the line) and
926 * return their cc lists to the cc free list.
928 for (i = cols; i < oldcols; i++)
932 * If we're shrinking the line, we now bodily move the
933 * entire cc section from where it started to where it now
934 * needs to be. (We have to do this before the resize, so
935 * that the data we're copying is still there. However, if
936 * we're expanding, we have to wait until _after_ the
937 * resize so that the space we're copying into is there.)
940 memmove(line->chars + cols, line->chars + oldcols,
941 (line->size - line->cols) * TSIZE);
944 * Now do the actual resize, leaving the _same_ amount of
945 * cc space as there was to begin with.
947 line->size += cols - oldcols;
948 line->chars = sresize(line->chars, line->size, TTYPE);
952 * If we're expanding the line, _now_ we move the cc
956 memmove(line->chars + cols, line->chars + oldcols,
957 (line->size - line->cols) * TSIZE);
960 * Go through what's left of the original line, and adjust
961 * the first cc_next pointer in each list. (All the
962 * subsequent ones are still valid because they are
963 * relative offsets within the cc block.) Also do the same
964 * to the head of the cc_free list.
966 for (i = 0; i < oldcols && i < cols; i++)
967 if (line->chars[i].cc_next)
968 line->chars[i].cc_next += cols - oldcols;
970 line->cc_free += cols - oldcols;
973 * And finally fill in the new space with erase chars. (We
974 * don't have to worry about cc lists here, because we
975 * _know_ the erase char doesn't have one.)
977 for (i = oldcols; i < cols; i++)
978 line->chars[i] = term->basic_erase_char;
987 * Get the number of lines in the scrollback.
989 static int sblines(Terminal *term)
991 int sblines = count234(term->scrollback);
992 if (term->erase_to_scrollback &&
993 term->alt_which && term->alt_screen) {
994 sblines += term->alt_sblines;
1000 * Retrieve a line of the screen or of the scrollback, according to
1001 * whether the y coordinate is non-negative or negative
1004 static termline *lineptr(Terminal *term, int y, int lineno, int screen)
1011 whichtree = term->screen;
1018 if (term->erase_to_scrollback &&
1019 term->alt_which && term->alt_screen) {
1020 altlines = term->alt_sblines;
1022 if (y < -altlines) {
1023 whichtree = term->scrollback;
1024 treeindex = y + altlines + count234(term->scrollback);
1026 whichtree = term->alt_screen;
1027 treeindex = y + term->alt_sblines;
1028 /* treeindex = y + count234(term->alt_screen); */
1031 if (whichtree == term->scrollback) {
1032 unsigned char *cline = index234(whichtree, treeindex);
1033 line = decompressline(cline, NULL);
1035 line = index234(whichtree, treeindex);
1038 /* We assume that we don't screw up and retrieve something out of range. */
1040 fatalbox("line==NULL in terminal.c\n"
1041 "lineno=%d y=%d w=%d h=%d\n"
1042 "count(scrollback=%p)=%d\n"
1043 "count(screen=%p)=%d\n"
1044 "count(alt=%p)=%d alt_sblines=%d\n"
1045 "whichtree=%p treeindex=%d\n\n"
1046 "Please contact <putty@projects.tartarus.org> "
1047 "and pass on the above information.",
1048 lineno, y, term->cols, term->rows,
1049 term->scrollback, count234(term->scrollback),
1050 term->screen, count234(term->screen),
1051 term->alt_screen, count234(term->alt_screen), term->alt_sblines,
1052 whichtree, treeindex);
1054 assert(line != NULL);
1056 resizeline(term, line, term->cols);
1057 /* FIXME: should we sort the compressed scrollback out here? */
1062 #define lineptr(x) (lineptr)(term,x,__LINE__,FALSE)
1063 #define scrlineptr(x) (lineptr)(term,x,__LINE__,TRUE)
1065 static void term_schedule_tblink(Terminal *term);
1066 static void term_schedule_cblink(Terminal *term);
1068 static void term_timer(void *ctx, unsigned long now)
1070 Terminal *term = (Terminal *)ctx;
1073 if (term->tblink_pending && now == term->next_tblink) {
1074 term->tblinker = !term->tblinker;
1075 term->tblink_pending = FALSE;
1076 term_schedule_tblink(term);
1080 if (term->cblink_pending && now == term->next_cblink) {
1081 term->cblinker = !term->cblinker;
1082 term->cblink_pending = FALSE;
1083 term_schedule_cblink(term);
1087 if (term->in_vbell && now == term->vbell_end) {
1088 term->in_vbell = FALSE;
1093 (term->window_update_pending && now == term->next_update))
1097 static void term_schedule_update(Terminal *term)
1099 if (!term->window_update_pending) {
1100 term->window_update_pending = TRUE;
1101 term->next_update = schedule_timer(UPDATE_DELAY, term_timer, term);
1106 * Call this whenever the terminal window state changes, to queue
1109 static void seen_disp_event(Terminal *term)
1111 term->seen_disp_event = TRUE; /* for scrollback-reset-on-activity */
1112 term_schedule_update(term);
1116 * Call when the terminal's blinking-text settings change, or when
1117 * a text blink has just occurred.
1119 static void term_schedule_tblink(Terminal *term)
1121 if (term->blink_is_real) {
1122 if (!term->tblink_pending)
1123 term->next_tblink = schedule_timer(TBLINK_DELAY, term_timer, term);
1124 term->tblink_pending = TRUE;
1126 term->tblinker = 1; /* reset when not in use */
1127 term->tblink_pending = FALSE;
1132 * Likewise with cursor blinks.
1134 static void term_schedule_cblink(Terminal *term)
1136 if (term->blink_cur && term->has_focus) {
1137 if (!term->cblink_pending)
1138 term->next_cblink = schedule_timer(CBLINK_DELAY, term_timer, term);
1139 term->cblink_pending = TRUE;
1141 term->cblinker = 1; /* reset when not in use */
1142 term->cblink_pending = FALSE;
1147 * Call to reset cursor blinking on new output.
1149 static void term_reset_cblink(Terminal *term)
1151 seen_disp_event(term);
1153 term->cblink_pending = FALSE;
1154 term_schedule_cblink(term);
1158 * Call to begin a visual bell.
1160 static void term_schedule_vbell(Terminal *term, int already_started,
1163 long ticks_already_gone;
1165 if (already_started)
1166 ticks_already_gone = GETTICKCOUNT() - startpoint;
1168 ticks_already_gone = 0;
1170 if (ticks_already_gone < VBELL_DELAY) {
1171 term->in_vbell = TRUE;
1172 term->vbell_end = schedule_timer(VBELL_DELAY - ticks_already_gone,
1175 term->in_vbell = FALSE;
1180 * Set up power-on settings for the terminal.
1181 * If 'clear' is false, don't actually clear the primary screen, and
1182 * position the cursor below the last non-blank line (scrolling if
1185 static void power_on(Terminal *term, int clear)
1187 term->alt_x = term->alt_y = 0;
1188 term->savecurs.x = term->savecurs.y = 0;
1189 term->alt_savecurs.x = term->alt_savecurs.y = 0;
1190 term->alt_t = term->marg_t = 0;
1191 if (term->rows != -1)
1192 term->alt_b = term->marg_b = term->rows - 1;
1194 term->alt_b = term->marg_b = 0;
1195 if (term->cols != -1) {
1197 for (i = 0; i < term->cols; i++)
1198 term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
1200 term->alt_om = term->dec_om = conf_get_int(term->conf, CONF_dec_om);
1201 term->alt_ins = term->insert = FALSE;
1202 term->alt_wnext = term->wrapnext =
1203 term->save_wnext = term->alt_save_wnext = FALSE;
1204 term->alt_wrap = term->wrap = conf_get_int(term->conf, CONF_wrap_mode);
1205 term->alt_cset = term->cset = term->save_cset = term->alt_save_cset = 0;
1206 term->alt_utf = term->utf = term->save_utf = term->alt_save_utf = 0;
1207 term->utf_state = 0;
1208 term->alt_sco_acs = term->sco_acs =
1209 term->save_sco_acs = term->alt_save_sco_acs = 0;
1210 term->cset_attr[0] = term->cset_attr[1] =
1211 term->save_csattr = term->alt_save_csattr = CSET_ASCII;
1213 term->in_vbell = FALSE;
1214 term->cursor_on = 1;
1215 term->big_cursor = 0;
1216 term->default_attr = term->save_attr =
1217 term->alt_save_attr = term->curr_attr = ATTR_DEFAULT;
1218 term->term_editing = term->term_echoing = FALSE;
1219 term->app_cursor_keys = conf_get_int(term->conf, CONF_app_cursor);
1220 term->app_keypad_keys = conf_get_int(term->conf, CONF_app_keypad);
1221 term->use_bce = conf_get_int(term->conf, CONF_bce);
1222 term->blink_is_real = conf_get_int(term->conf, CONF_blinktext);
1223 term->erase_char = term->basic_erase_char;
1224 term->alt_which = 0;
1225 term_print_finish(term);
1226 term->xterm_mouse = 0;
1227 term->xterm_extended_mouse = 0;
1228 term->urxvt_extended_mouse = 0;
1229 set_raw_mouse_mode(term->frontend, FALSE);
1230 term->bracketed_paste = FALSE;
1233 for (i = 0; i < 256; i++)
1234 term->wordness[i] = conf_get_int_int(term->conf, CONF_wordness, i);
1237 swap_screen(term, 1, FALSE, FALSE);
1238 erase_lots(term, FALSE, TRUE, TRUE);
1239 swap_screen(term, 0, FALSE, FALSE);
1241 erase_lots(term, FALSE, TRUE, TRUE);
1242 term->curs.y = find_last_nonempty_line(term, term->screen) + 1;
1243 if (term->curs.y == term->rows) {
1245 scroll(term, 0, term->rows - 1, 1, TRUE);
1251 term_schedule_tblink(term);
1252 term_schedule_cblink(term);
1256 * Force a screen update.
1258 void term_update(Terminal *term)
1262 term->window_update_pending = FALSE;
1264 ctx = get_ctx(term->frontend);
1266 int need_sbar_update = term->seen_disp_event;
1267 if (term->seen_disp_event && term->scroll_on_disp) {
1268 term->disptop = 0; /* return to main screen */
1269 term->seen_disp_event = 0;
1270 need_sbar_update = TRUE;
1273 if (need_sbar_update)
1275 do_paint(term, ctx, TRUE);
1276 sys_cursor(term->frontend, term->curs.x, term->curs.y - term->disptop);
1282 * Called from front end when a keypress occurs, to trigger
1283 * anything magical that needs to happen in that situation.
1285 void term_seen_key_event(Terminal *term)
1288 * On any keypress, clear the bell overload mechanism
1289 * completely, on the grounds that large numbers of
1290 * beeps coming from deliberate key action are likely
1291 * to be intended (e.g. beeps from filename completion
1292 * blocking repeatedly).
1294 term->beep_overloaded = FALSE;
1295 while (term->beephead) {
1296 struct beeptime *tmp = term->beephead;
1297 term->beephead = tmp->next;
1300 term->beeptail = NULL;
1304 * Reset the scrollback on keypress, if we're doing that.
1306 if (term->scroll_on_key) {
1307 term->disptop = 0; /* return to main screen */
1308 seen_disp_event(term);
1313 * Same as power_on(), but an external function.
1315 void term_pwron(Terminal *term, int clear)
1317 power_on(term, clear);
1318 if (term->ldisc) /* cause ldisc to notice changes */
1319 ldisc_send(term->ldisc, NULL, 0, 0);
1325 static void set_erase_char(Terminal *term)
1327 term->erase_char = term->basic_erase_char;
1329 term->erase_char.attr = (term->curr_attr &
1330 (ATTR_FGMASK | ATTR_BGMASK));
1334 * We copy a bunch of stuff out of the Conf structure into local
1335 * fields in the Terminal structure, to avoid the repeated tree234
1336 * lookups which would be involved in fetching them from the former
1339 void term_copy_stuff_from_conf(Terminal *term)
1341 term->ansi_colour = conf_get_int(term->conf, CONF_ansi_colour);
1342 term->arabicshaping = conf_get_int(term->conf, CONF_arabicshaping);
1343 term->beep = conf_get_int(term->conf, CONF_beep);
1344 term->bellovl = conf_get_int(term->conf, CONF_bellovl);
1345 term->bellovl_n = conf_get_int(term->conf, CONF_bellovl_n);
1346 term->bellovl_s = conf_get_int(term->conf, CONF_bellovl_s);
1347 term->bellovl_t = conf_get_int(term->conf, CONF_bellovl_t);
1348 term->bidi = conf_get_int(term->conf, CONF_bidi);
1349 term->bksp_is_delete = conf_get_int(term->conf, CONF_bksp_is_delete);
1350 term->blink_cur = conf_get_int(term->conf, CONF_blink_cur);
1351 term->blinktext = conf_get_int(term->conf, CONF_blinktext);
1352 term->cjk_ambig_wide = conf_get_int(term->conf, CONF_cjk_ambig_wide);
1353 term->conf_height = conf_get_int(term->conf, CONF_height);
1354 term->conf_width = conf_get_int(term->conf, CONF_width);
1355 term->crhaslf = conf_get_int(term->conf, CONF_crhaslf);
1356 term->erase_to_scrollback = conf_get_int(term->conf, CONF_erase_to_scrollback);
1357 term->funky_type = conf_get_int(term->conf, CONF_funky_type);
1358 term->lfhascr = conf_get_int(term->conf, CONF_lfhascr);
1359 term->logflush = conf_get_int(term->conf, CONF_logflush);
1360 term->logtype = conf_get_int(term->conf, CONF_logtype);
1361 term->mouse_override = conf_get_int(term->conf, CONF_mouse_override);
1362 term->nethack_keypad = conf_get_int(term->conf, CONF_nethack_keypad);
1363 term->no_alt_screen = conf_get_int(term->conf, CONF_no_alt_screen);
1364 term->no_applic_c = conf_get_int(term->conf, CONF_no_applic_c);
1365 term->no_applic_k = conf_get_int(term->conf, CONF_no_applic_k);
1366 term->no_dbackspace = conf_get_int(term->conf, CONF_no_dbackspace);
1367 term->no_mouse_rep = conf_get_int(term->conf, CONF_no_mouse_rep);
1368 term->no_remote_charset = conf_get_int(term->conf, CONF_no_remote_charset);
1369 term->no_remote_resize = conf_get_int(term->conf, CONF_no_remote_resize);
1370 term->no_remote_wintitle = conf_get_int(term->conf, CONF_no_remote_wintitle);
1371 term->rawcnp = conf_get_int(term->conf, CONF_rawcnp);
1372 term->rect_select = conf_get_int(term->conf, CONF_rect_select);
1373 term->remote_qtitle_action = conf_get_int(term->conf, CONF_remote_qtitle_action);
1374 term->rxvt_homeend = conf_get_int(term->conf, CONF_rxvt_homeend);
1375 term->scroll_on_disp = conf_get_int(term->conf, CONF_scroll_on_disp);
1376 term->scroll_on_key = conf_get_int(term->conf, CONF_scroll_on_key);
1377 term->xterm_256_colour = conf_get_int(term->conf, CONF_xterm_256_colour);
1380 * Parse the control-character escapes in the configured
1381 * answerback string.
1384 char *answerback = conf_get_str(term->conf, CONF_answerback);
1385 int maxlen = strlen(answerback);
1387 term->answerback = snewn(maxlen, char);
1388 term->answerbacklen = 0;
1390 while (*answerback) {
1392 char c = ctrlparse(answerback, &n);
1394 term->answerback[term->answerbacklen++] = c;
1397 term->answerback[term->answerbacklen++] = *answerback++;
1404 * When the user reconfigures us, we need to check the forbidden-
1405 * alternate-screen config option, disable raw mouse mode if the
1406 * user has disabled mouse reporting, and abandon a print job if
1407 * the user has disabled printing.
1409 void term_reconfig(Terminal *term, Conf *conf)
1412 * Before adopting the new config, check all those terminal
1413 * settings which control power-on defaults; and if they've
1414 * changed, we will modify the current state as well as the
1415 * default one. The full list is: Auto wrap mode, DEC Origin
1416 * Mode, BCE, blinking text, character classes.
1418 int reset_wrap, reset_decom, reset_bce, reset_tblink, reset_charclass;
1421 reset_wrap = (conf_get_int(term->conf, CONF_wrap_mode) !=
1422 conf_get_int(conf, CONF_wrap_mode));
1423 reset_decom = (conf_get_int(term->conf, CONF_dec_om) !=
1424 conf_get_int(conf, CONF_dec_om));
1425 reset_bce = (conf_get_int(term->conf, CONF_bce) !=
1426 conf_get_int(conf, CONF_bce));
1427 reset_tblink = (conf_get_int(term->conf, CONF_blinktext) !=
1428 conf_get_int(conf, CONF_blinktext));
1429 reset_charclass = 0;
1430 for (i = 0; i < 256; i++)
1431 if (conf_get_int_int(term->conf, CONF_wordness, i) !=
1432 conf_get_int_int(conf, CONF_wordness, i))
1433 reset_charclass = 1;
1436 * If the bidi or shaping settings have changed, flush the bidi
1439 if (conf_get_int(term->conf, CONF_arabicshaping) !=
1440 conf_get_int(conf, CONF_arabicshaping) ||
1441 conf_get_int(term->conf, CONF_bidi) !=
1442 conf_get_int(conf, CONF_bidi)) {
1443 for (i = 0; i < term->bidi_cache_size; i++) {
1444 sfree(term->pre_bidi_cache[i].chars);
1445 sfree(term->post_bidi_cache[i].chars);
1446 term->pre_bidi_cache[i].width = -1;
1447 term->pre_bidi_cache[i].chars = NULL;
1448 term->post_bidi_cache[i].width = -1;
1449 term->post_bidi_cache[i].chars = NULL;
1453 conf_free(term->conf);
1454 term->conf = conf_copy(conf);
1457 term->alt_wrap = term->wrap = conf_get_int(term->conf, CONF_wrap_mode);
1459 term->alt_om = term->dec_om = conf_get_int(term->conf, CONF_dec_om);
1461 term->use_bce = conf_get_int(term->conf, CONF_bce);
1462 set_erase_char(term);
1465 term->blink_is_real = conf_get_int(term->conf, CONF_blinktext);
1467 if (reset_charclass)
1468 for (i = 0; i < 256; i++)
1469 term->wordness[i] = conf_get_int_int(term->conf, CONF_wordness, i);
1471 if (conf_get_int(term->conf, CONF_no_alt_screen))
1472 swap_screen(term, 0, FALSE, FALSE);
1473 if (conf_get_int(term->conf, CONF_no_mouse_rep)) {
1474 term->xterm_mouse = 0;
1475 set_raw_mouse_mode(term->frontend, 0);
1477 if (conf_get_int(term->conf, CONF_no_remote_charset)) {
1478 term->cset_attr[0] = term->cset_attr[1] = CSET_ASCII;
1479 term->sco_acs = term->alt_sco_acs = 0;
1482 if (!conf_get_str(term->conf, CONF_printer)) {
1483 term_print_finish(term);
1485 term_schedule_tblink(term);
1486 term_schedule_cblink(term);
1487 term_copy_stuff_from_conf(term);
1491 * Clear the scrollback.
1493 void term_clrsb(Terminal *term)
1495 unsigned char *line;
1497 while ((line = delpos234(term->scrollback, 0)) != NULL) {
1498 sfree(line); /* this is compressed data, not a termline */
1500 term->tempsblines = 0;
1501 term->alt_sblines = 0;
1506 * Initialise the terminal.
1508 Terminal *term_init(Conf *myconf, struct unicode_data *ucsdata,
1514 * Allocate a new Terminal structure and initialise the fields
1517 term = snew(Terminal);
1518 term->frontend = frontend;
1519 term->ucsdata = ucsdata;
1520 term->conf = conf_copy(myconf);
1521 term->logctx = NULL;
1522 term->compatibility_level = TM_PUTTY;
1523 strcpy(term->id_string, "\033[?6c");
1524 term->cblink_pending = term->tblink_pending = FALSE;
1525 term->paste_buffer = NULL;
1526 term->paste_len = 0;
1527 bufchain_init(&term->inbuf);
1528 bufchain_init(&term->printer_buf);
1529 term->printing = term->only_printing = FALSE;
1530 term->print_job = NULL;
1531 term->vt52_mode = FALSE;
1532 term->cr_lf_return = FALSE;
1533 term->seen_disp_event = FALSE;
1534 term->mouse_is_down = FALSE;
1535 term->reset_132 = FALSE;
1536 term->cblinker = term->tblinker = 0;
1537 term->has_focus = 1;
1538 term->repeat_off = FALSE;
1539 term->termstate = TOPLEVEL;
1540 term->selstate = NO_SELECTION;
1543 term_copy_stuff_from_conf(term);
1545 term->screen = term->alt_screen = term->scrollback = NULL;
1546 term->tempsblines = 0;
1547 term->alt_sblines = 0;
1549 term->disptext = NULL;
1550 term->dispcursx = term->dispcursy = -1;
1553 term->rows = term->cols = -1;
1554 power_on(term, TRUE);
1555 term->beephead = term->beeptail = NULL;
1556 #ifdef OPTIMISE_SCROLL
1557 term->scrollhead = term->scrolltail = NULL;
1558 #endif /* OPTIMISE_SCROLL */
1560 term->lastbeep = FALSE;
1561 term->beep_overloaded = FALSE;
1562 term->attr_mask = 0xffffffff;
1563 term->resize_fn = NULL;
1564 term->resize_ctx = NULL;
1565 term->in_term_out = FALSE;
1567 term->ltemp_size = 0;
1568 term->wcFrom = NULL;
1570 term->wcFromTo_size = 0;
1572 term->window_update_pending = FALSE;
1574 term->bidi_cache_size = 0;
1575 term->pre_bidi_cache = term->post_bidi_cache = NULL;
1578 term->basic_erase_char.chr = CSET_ASCII | ' ';
1579 term->basic_erase_char.attr = ATTR_DEFAULT;
1580 term->basic_erase_char.cc_next = 0;
1581 term->erase_char = term->basic_erase_char;
1586 void term_free(Terminal *term)
1589 struct beeptime *beep;
1592 while ((line = delpos234(term->scrollback, 0)) != NULL)
1593 sfree(line); /* compressed data, not a termline */
1594 freetree234(term->scrollback);
1595 while ((line = delpos234(term->screen, 0)) != NULL)
1597 freetree234(term->screen);
1598 while ((line = delpos234(term->alt_screen, 0)) != NULL)
1600 freetree234(term->alt_screen);
1601 if (term->disptext) {
1602 for (i = 0; i < term->rows; i++)
1603 freeline(term->disptext[i]);
1605 sfree(term->disptext);
1606 while (term->beephead) {
1607 beep = term->beephead;
1608 term->beephead = beep->next;
1611 bufchain_clear(&term->inbuf);
1613 printer_finish_job(term->print_job);
1614 bufchain_clear(&term->printer_buf);
1615 sfree(term->paste_buffer);
1617 sfree(term->wcFrom);
1620 for (i = 0; i < term->bidi_cache_size; i++) {
1621 sfree(term->pre_bidi_cache[i].chars);
1622 sfree(term->post_bidi_cache[i].chars);
1623 sfree(term->post_bidi_cache[i].forward);
1624 sfree(term->post_bidi_cache[i].backward);
1626 sfree(term->pre_bidi_cache);
1627 sfree(term->post_bidi_cache);
1631 expire_timer_context(term);
1633 conf_free(term->conf);
1639 * Set up the terminal for a given size.
1641 void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
1644 termline **newdisp, *line;
1645 int i, j, oldrows = term->rows;
1647 int save_alt_which = term->alt_which;
1649 if (newrows == term->rows && newcols == term->cols &&
1650 newsavelines == term->savelines)
1651 return; /* nothing to do */
1653 /* Behave sensibly if we're given zero (or negative) rows/cols */
1655 if (newrows < 1) newrows = 1;
1656 if (newcols < 1) newcols = 1;
1659 swap_screen(term, 0, FALSE, FALSE);
1661 term->alt_t = term->marg_t = 0;
1662 term->alt_b = term->marg_b = newrows - 1;
1664 if (term->rows == -1) {
1665 term->scrollback = newtree234(NULL);
1666 term->screen = newtree234(NULL);
1667 term->tempsblines = 0;
1672 * Resize the screen and scrollback. We only need to shift
1673 * lines around within our data structures, because lineptr()
1674 * will take care of resizing each individual line if
1677 * - If the new screen is longer, we shunt lines in from temporary
1678 * scrollback if possible, otherwise we add new blank lines at
1681 * - If the new screen is shorter, we remove any blank lines at
1682 * the bottom if possible, otherwise shunt lines above the cursor
1683 * to scrollback if possible, otherwise delete lines below the
1686 * - Then, if the new scrollback length is less than the
1687 * amount of scrollback we actually have, we must throw some
1690 sblen = count234(term->scrollback);
1691 /* Do this loop to expand the screen if newrows > rows */
1692 assert(term->rows == count234(term->screen));
1693 while (term->rows < newrows) {
1694 if (term->tempsblines > 0) {
1695 unsigned char *cline;
1696 /* Insert a line from the scrollback at the top of the screen. */
1697 assert(sblen >= term->tempsblines);
1698 cline = delpos234(term->scrollback, --sblen);
1699 line = decompressline(cline, NULL);
1701 line->temporary = FALSE; /* reconstituted line is now real */
1702 term->tempsblines -= 1;
1703 addpos234(term->screen, line, 0);
1705 term->savecurs.y += 1;
1707 term->alt_savecurs.y += 1;
1709 /* Add a new blank line at the bottom of the screen. */
1710 line = newline(term, newcols, FALSE);
1711 addpos234(term->screen, line, count234(term->screen));
1715 /* Do this loop to shrink the screen if newrows < rows */
1716 while (term->rows > newrows) {
1717 if (term->curs.y < term->rows - 1) {
1718 /* delete bottom row, unless it contains the cursor */
1719 line = delpos234(term->screen, term->rows - 1);
1722 /* push top row to scrollback */
1723 line = delpos234(term->screen, 0);
1724 addpos234(term->scrollback, compressline(line), sblen++);
1726 term->tempsblines += 1;
1728 term->savecurs.y -= 1;
1730 term->alt_savecurs.y -= 1;
1734 assert(term->rows == newrows);
1735 assert(count234(term->screen) == newrows);
1737 /* Delete any excess lines from the scrollback. */
1738 while (sblen > newsavelines) {
1739 line = delpos234(term->scrollback, 0);
1743 if (sblen < term->tempsblines)
1744 term->tempsblines = sblen;
1745 assert(count234(term->scrollback) <= newsavelines);
1746 assert(count234(term->scrollback) >= term->tempsblines);
1749 /* Make a new displayed text buffer. */
1750 newdisp = snewn(newrows, termline *);
1751 for (i = 0; i < newrows; i++) {
1752 newdisp[i] = newline(term, newcols, FALSE);
1753 for (j = 0; j < newcols; j++)
1754 newdisp[i]->chars[j].attr = ATTR_INVALID;
1756 if (term->disptext) {
1757 for (i = 0; i < oldrows; i++)
1758 freeline(term->disptext[i]);
1760 sfree(term->disptext);
1761 term->disptext = newdisp;
1762 term->dispcursx = term->dispcursy = -1;
1764 /* Make a new alternate screen. */
1765 newalt = newtree234(NULL);
1766 for (i = 0; i < newrows; i++) {
1767 line = newline(term, newcols, TRUE);
1768 addpos234(newalt, line, i);
1770 if (term->alt_screen) {
1771 while (NULL != (line = delpos234(term->alt_screen, 0)))
1773 freetree234(term->alt_screen);
1775 term->alt_screen = newalt;
1776 term->alt_sblines = 0;
1778 term->tabs = sresize(term->tabs, newcols, unsigned char);
1781 for (i = (term->cols > 0 ? term->cols : 0); i < newcols; i++)
1782 term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
1785 /* Check that the cursor positions are still valid. */
1786 if (term->savecurs.y < 0)
1787 term->savecurs.y = 0;
1788 if (term->savecurs.y >= newrows)
1789 term->savecurs.y = newrows - 1;
1790 if (term->savecurs.x >= newcols)
1791 term->savecurs.x = newcols - 1;
1792 if (term->alt_savecurs.y < 0)
1793 term->alt_savecurs.y = 0;
1794 if (term->alt_savecurs.y >= newrows)
1795 term->alt_savecurs.y = newrows - 1;
1796 if (term->alt_savecurs.x >= newcols)
1797 term->alt_savecurs.x = newcols - 1;
1798 if (term->curs.y < 0)
1800 if (term->curs.y >= newrows)
1801 term->curs.y = newrows - 1;
1802 if (term->curs.x >= newcols)
1803 term->curs.x = newcols - 1;
1804 if (term->alt_y < 0)
1806 if (term->alt_y >= newrows)
1807 term->alt_y = newrows - 1;
1808 if (term->alt_x >= newcols)
1809 term->alt_x = newcols - 1;
1810 term->alt_x = term->alt_y = 0;
1811 term->wrapnext = term->alt_wnext = FALSE;
1813 term->rows = newrows;
1814 term->cols = newcols;
1815 term->savelines = newsavelines;
1817 swap_screen(term, save_alt_which, FALSE, FALSE);
1821 if (term->resize_fn)
1822 term->resize_fn(term->resize_ctx, term->cols, term->rows);
1826 * Hand a function and context pointer to the terminal which it can
1827 * use to notify a back end of resizes.
1829 void term_provide_resize_fn(Terminal *term,
1830 void (*resize_fn)(void *, int, int),
1833 term->resize_fn = resize_fn;
1834 term->resize_ctx = resize_ctx;
1835 if (resize_fn && term->cols > 0 && term->rows > 0)
1836 resize_fn(resize_ctx, term->cols, term->rows);
1839 /* Find the bottom line on the screen that has any content.
1840 * If only the top line has content, returns 0.
1841 * If no lines have content, return -1.
1843 static int find_last_nonempty_line(Terminal * term, tree234 * screen)
1846 for (i = count234(screen) - 1; i >= 0; i--) {
1847 termline *line = index234(screen, i);
1849 for (j = 0; j < line->cols; j++)
1850 if (!termchars_equal(&line->chars[j], &term->erase_char))
1852 if (j != line->cols) break;
1858 * Swap screens. If `reset' is TRUE and we have been asked to
1859 * switch to the alternate screen, we must bring most of its
1860 * configuration from the main screen and erase the contents of the
1861 * alternate screen completely. (This is even true if we're already
1862 * on it! Blame xterm.)
1864 static void swap_screen(Terminal *term, int which, int reset, int keep_cur_pos)
1871 reset = FALSE; /* do no weird resetting if which==0 */
1873 if (which != term->alt_which) {
1874 term->alt_which = which;
1876 ttr = term->alt_screen;
1877 term->alt_screen = term->screen;
1879 term->alt_sblines = find_last_nonempty_line(term, term->alt_screen) + 1;
1881 if (!reset && !keep_cur_pos)
1882 term->curs.x = term->alt_x;
1885 if (!reset && !keep_cur_pos)
1886 term->curs.y = term->alt_y;
1889 if (!reset) term->marg_t = term->alt_t;
1892 if (!reset) term->marg_b = term->alt_b;
1895 if (!reset) term->dec_om = term->alt_om;
1898 if (!reset) term->wrap = term->alt_wrap;
1901 if (!reset) term->wrapnext = term->alt_wnext;
1902 term->alt_wnext = t;
1904 if (!reset) term->insert = term->alt_ins;
1907 if (!reset) term->cset = term->alt_cset;
1910 if (!reset) term->utf = term->alt_utf;
1913 if (!reset) term->sco_acs = term->alt_sco_acs;
1914 term->alt_sco_acs = t;
1916 tp = term->savecurs;
1917 if (!reset && !keep_cur_pos)
1918 term->savecurs = term->alt_savecurs;
1919 term->alt_savecurs = tp;
1920 t = term->save_cset;
1921 if (!reset && !keep_cur_pos)
1922 term->save_cset = term->alt_save_cset;
1923 term->alt_save_cset = t;
1924 t = term->save_csattr;
1925 if (!reset && !keep_cur_pos)
1926 term->save_csattr = term->alt_save_csattr;
1927 term->alt_save_csattr = t;
1928 t = term->save_attr;
1929 if (!reset && !keep_cur_pos)
1930 term->save_attr = term->alt_save_attr;
1931 term->alt_save_attr = t;
1933 if (!reset && !keep_cur_pos)
1934 term->save_utf = term->alt_save_utf;
1935 term->alt_save_utf = t;
1936 t = term->save_wnext;
1937 if (!reset && !keep_cur_pos)
1938 term->save_wnext = term->alt_save_wnext;
1939 term->alt_save_wnext = t;
1940 t = term->save_sco_acs;
1941 if (!reset && !keep_cur_pos)
1942 term->save_sco_acs = term->alt_save_sco_acs;
1943 term->alt_save_sco_acs = t;
1946 if (reset && term->screen) {
1948 * Yes, this _is_ supposed to honour background-colour-erase.
1950 erase_lots(term, FALSE, TRUE, TRUE);
1955 * Update the scroll bar.
1957 static void update_sbar(Terminal *term)
1959 int nscroll = sblines(term);
1960 set_sbar(term->frontend, nscroll + term->rows,
1961 nscroll + term->disptop, term->rows);
1965 * Check whether the region bounded by the two pointers intersects
1966 * the scroll region, and de-select the on-screen selection if so.
1968 static void check_selection(Terminal *term, pos from, pos to)
1970 if (poslt(from, term->selend) && poslt(term->selstart, to))
1975 * Scroll the screen. (`lines' is +ve for scrolling forward, -ve
1976 * for backward.) `sb' is TRUE if the scrolling is permitted to
1977 * affect the scrollback buffer.
1979 static void scroll(Terminal *term, int topline, int botline, int lines, int sb)
1982 int i, seltop, scrollwinsize;
1983 #ifdef OPTIMISE_SCROLL
1984 int olddisptop, shift;
1985 #endif /* OPTIMISE_SCROLL */
1987 if (topline != 0 || term->alt_which != 0)
1990 #ifdef OPTIMISE_SCROLL
1991 olddisptop = term->disptop;
1993 #endif /* OPTIMISE_SCROLL */
1995 scrollwinsize = botline - topline + 1;
1999 if (lines > scrollwinsize)
2000 lines = scrollwinsize;
2001 while (lines-- > 0) {
2002 line = delpos234(term->screen, botline);
2003 resizeline(term, line, term->cols);
2004 for (i = 0; i < term->cols; i++)
2005 copy_termchar(line, i, &term->erase_char);
2006 line->lattr = LATTR_NORM;
2007 addpos234(term->screen, line, topline);
2009 if (term->selstart.y >= topline && term->selstart.y <= botline) {
2011 if (term->selstart.y > botline) {
2012 term->selstart.y = botline + 1;
2013 term->selstart.x = 0;
2016 if (term->selend.y >= topline && term->selend.y <= botline) {
2018 if (term->selend.y > botline) {
2019 term->selend.y = botline + 1;
2025 if (lines > scrollwinsize)
2026 lines = scrollwinsize;
2027 while (lines-- > 0) {
2028 line = delpos234(term->screen, topline);
2029 #ifdef TERM_CC_DIAGS
2032 if (sb && term->savelines > 0) {
2033 int sblen = count234(term->scrollback);
2035 * We must add this line to the scrollback. We'll
2036 * remove a line from the top of the scrollback if
2037 * the scrollback is full.
2039 if (sblen == term->savelines) {
2040 unsigned char *cline;
2043 cline = delpos234(term->scrollback, 0);
2046 term->tempsblines += 1;
2048 addpos234(term->scrollback, compressline(line), sblen);
2050 /* now `line' itself can be reused as the bottom line */
2053 * If the user is currently looking at part of the
2054 * scrollback, and they haven't enabled any options
2055 * that are going to reset the scrollback as a
2056 * result of this movement, then the chances are
2057 * they'd like to keep looking at the same line. So
2058 * we move their viewpoint at the same rate as the
2059 * scroll, at least until their viewpoint hits the
2060 * top end of the scrollback buffer, at which point
2061 * we don't have the choice any more.
2063 * Thanks to Jan Holmen Holsten for the idea and
2064 * initial implementation.
2066 if (term->disptop > -term->savelines && term->disptop < 0)
2069 resizeline(term, line, term->cols);
2070 for (i = 0; i < term->cols; i++)
2071 copy_termchar(line, i, &term->erase_char);
2072 line->lattr = LATTR_NORM;
2073 addpos234(term->screen, line, botline);
2076 * If the selection endpoints move into the scrollback,
2077 * we keep them moving until they hit the top. However,
2078 * of course, if the line _hasn't_ moved into the
2079 * scrollback then we don't do this, and cut them off
2080 * at the top of the scroll region.
2082 * This applies to selstart and selend (for an existing
2083 * selection), and also selanchor (for one being
2084 * selected as we speak).
2086 seltop = sb ? -term->savelines : topline;
2088 if (term->selstate != NO_SELECTION) {
2089 if (term->selstart.y >= seltop &&
2090 term->selstart.y <= botline) {
2092 if (term->selstart.y < seltop) {
2093 term->selstart.y = seltop;
2094 term->selstart.x = 0;
2097 if (term->selend.y >= seltop && term->selend.y <= botline) {
2099 if (term->selend.y < seltop) {
2100 term->selend.y = seltop;
2104 if (term->selanchor.y >= seltop &&
2105 term->selanchor.y <= botline) {
2106 term->selanchor.y--;
2107 if (term->selanchor.y < seltop) {
2108 term->selanchor.y = seltop;
2109 term->selanchor.x = 0;
2115 #ifdef OPTIMISE_SCROLL
2116 shift += term->disptop - olddisptop;
2117 if (shift < term->rows && shift > -term->rows && shift != 0)
2118 scroll_display(term, topline, botline, shift);
2119 #endif /* OPTIMISE_SCROLL */
2122 #ifdef OPTIMISE_SCROLL
2124 * Add a scroll of a region on the screen into the pending scroll list.
2125 * `lines' is +ve for scrolling forward, -ve for backward.
2127 * If the scroll is on the same area as the last scroll in the list,
2130 static void save_scroll(Terminal *term, int topline, int botline, int lines)
2132 struct scrollregion *newscroll;
2133 if (term->scrolltail &&
2134 term->scrolltail->topline == topline &&
2135 term->scrolltail->botline == botline) {
2136 term->scrolltail->lines += lines;
2138 newscroll = snew(struct scrollregion);
2139 newscroll->topline = topline;
2140 newscroll->botline = botline;
2141 newscroll->lines = lines;
2142 newscroll->next = NULL;
2144 if (!term->scrollhead)
2145 term->scrollhead = newscroll;
2147 term->scrolltail->next = newscroll;
2148 term->scrolltail = newscroll;
2153 * Scroll the physical display, and our conception of it in disptext.
2155 static void scroll_display(Terminal *term, int topline, int botline, int lines)
2157 int distance, nlines, i, j;
2159 distance = lines > 0 ? lines : -lines;
2160 nlines = botline - topline + 1 - distance;
2162 for (i = 0; i < nlines; i++)
2163 for (j = 0; j < term->cols; j++)
2164 copy_termchar(term->disptext[i], j,
2165 term->disptext[i+distance]->chars+j);
2166 if (term->dispcursy >= 0 &&
2167 term->dispcursy >= topline + distance &&
2168 term->dispcursy < topline + distance + nlines)
2169 term->dispcursy -= distance;
2170 for (i = 0; i < distance; i++)
2171 for (j = 0; j < term->cols; j++)
2172 term->disptext[nlines+i]->chars[j].attr |= ATTR_INVALID;
2174 for (i = nlines; i-- ;)
2175 for (j = 0; j < term->cols; j++)
2176 copy_termchar(term->disptext[i+distance], j,
2177 term->disptext[i]->chars+j);
2178 if (term->dispcursy >= 0 &&
2179 term->dispcursy >= topline &&
2180 term->dispcursy < topline + nlines)
2181 term->dispcursy += distance;
2182 for (i = 0; i < distance; i++)
2183 for (j = 0; j < term->cols; j++)
2184 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
2186 save_scroll(term, topline, botline, lines);
2188 #endif /* OPTIMISE_SCROLL */
2191 * Move the cursor to a given position, clipping at boundaries. We
2192 * may or may not want to clip at the scroll margin: marg_clip is 0
2193 * not to, 1 to disallow _passing_ the margins, and 2 to disallow
2194 * even _being_ outside the margins.
2196 static void move(Terminal *term, int x, int y, int marg_clip)
2200 if (x >= term->cols)
2203 if ((term->curs.y >= term->marg_t || marg_clip == 2) &&
2206 if ((term->curs.y <= term->marg_b || marg_clip == 2) &&
2212 if (y >= term->rows)
2216 term->wrapnext = FALSE;
2220 * Save or restore the cursor and SGR mode.
2222 static void save_cursor(Terminal *term, int save)
2225 term->savecurs = term->curs;
2226 term->save_attr = term->curr_attr;
2227 term->save_cset = term->cset;
2228 term->save_utf = term->utf;
2229 term->save_wnext = term->wrapnext;
2230 term->save_csattr = term->cset_attr[term->cset];
2231 term->save_sco_acs = term->sco_acs;
2233 term->curs = term->savecurs;
2234 /* Make sure the window hasn't shrunk since the save */
2235 if (term->curs.x >= term->cols)
2236 term->curs.x = term->cols - 1;
2237 if (term->curs.y >= term->rows)
2238 term->curs.y = term->rows - 1;
2240 term->curr_attr = term->save_attr;
2241 term->cset = term->save_cset;
2242 term->utf = term->save_utf;
2243 term->wrapnext = term->save_wnext;
2245 * wrapnext might reset to False if the x position is no
2246 * longer at the rightmost edge.
2248 if (term->wrapnext && term->curs.x < term->cols-1)
2249 term->wrapnext = FALSE;
2250 term->cset_attr[term->cset] = term->save_csattr;
2251 term->sco_acs = term->save_sco_acs;
2252 set_erase_char(term);
2257 * This function is called before doing _anything_ which affects
2258 * only part of a line of text. It is used to mark the boundary
2259 * between two character positions, and it indicates that some sort
2260 * of effect is going to happen on only one side of that boundary.
2262 * The effect of this function is to check whether a CJK
2263 * double-width character is straddling the boundary, and to remove
2264 * it and replace it with two spaces if so. (Of course, one or
2265 * other of those spaces is then likely to be replaced with
2266 * something else again, as a result of whatever happens next.)
2268 * Also, if the boundary is at the right-hand _edge_ of the screen,
2269 * it implies something deliberate is being done to the rightmost
2270 * column position; hence we must clear LATTR_WRAPPED2.
2272 * The input to the function is the coordinates of the _second_
2273 * character of the pair.
2275 static void check_boundary(Terminal *term, int x, int y)
2279 /* Validate input coordinates, just in case. */
2280 if (x == 0 || x > term->cols)
2283 ldata = scrlineptr(y);
2284 if (x == term->cols) {
2285 ldata->lattr &= ~LATTR_WRAPPED2;
2287 if (ldata->chars[x].chr == UCSWIDE) {
2288 clear_cc(ldata, x-1);
2290 ldata->chars[x-1].chr = ' ' | CSET_ASCII;
2291 ldata->chars[x] = ldata->chars[x-1];
2297 * Erase a large portion of the screen: the whole screen, or the
2298 * whole line, or parts thereof.
2300 static void erase_lots(Terminal *term,
2301 int line_only, int from_begin, int to_end)
2305 int erasing_lines_from_top = 0;
2308 start.y = term->curs.y;
2310 end.y = term->curs.y + 1;
2312 erase_lattr = FALSE;
2327 if (!from_begin || !to_end)
2328 check_boundary(term, term->curs.x, term->curs.y);
2329 check_selection(term, start, end);
2331 /* Clear screen also forces a full window redraw, just in case. */
2332 if (start.y == 0 && start.x == 0 && end.y == term->rows)
2333 term_invalidate(term);
2335 /* Lines scrolled away shouldn't be brought back on if the terminal
2337 if (start.y == 0 && start.x == 0 && end.x == 0 && erase_lattr)
2338 erasing_lines_from_top = 1;
2340 if (term->erase_to_scrollback && erasing_lines_from_top) {
2341 /* If it's a whole number of lines, starting at the top, and
2342 * we're fully erasing them, erase by scrolling and keep the
2343 * lines in the scrollback. */
2344 int scrolllines = end.y;
2345 if (end.y == term->rows) {
2346 /* Shrink until we find a non-empty row.*/
2347 scrolllines = find_last_nonempty_line(term, term->screen) + 1;
2349 if (scrolllines > 0)
2350 scroll(term, 0, scrolllines - 1, scrolllines, TRUE);
2352 termline *ldata = scrlineptr(start.y);
2353 while (poslt(start, end)) {
2354 if (start.x == term->cols) {
2356 ldata->lattr &= ~(LATTR_WRAPPED | LATTR_WRAPPED2);
2358 ldata->lattr = LATTR_NORM;
2360 copy_termchar(ldata, start.x, &term->erase_char);
2362 if (incpos(start) && start.y < term->rows) {
2363 ldata = scrlineptr(start.y);
2368 /* After an erase of lines from the top of the screen, we shouldn't
2369 * bring the lines back again if the terminal enlarges (since the user or
2370 * application has explictly thrown them away). */
2371 if (erasing_lines_from_top && !(term->alt_which))
2372 term->tempsblines = 0;
2376 * Insert or delete characters within the current line. n is +ve if
2377 * insertion is desired, and -ve for deletion.
2379 static void insch(Terminal *term, int n)
2381 int dir = (n < 0 ? -1 : +1);
2386 n = (n < 0 ? -n : n);
2387 if (n > term->cols - term->curs.x)
2388 n = term->cols - term->curs.x;
2389 m = term->cols - term->curs.x - n;
2390 cursplus.y = term->curs.y;
2391 cursplus.x = term->curs.x + n;
2392 check_selection(term, term->curs, cursplus);
2393 check_boundary(term, term->curs.x, term->curs.y);
2395 check_boundary(term, term->curs.x + n, term->curs.y);
2396 ldata = scrlineptr(term->curs.y);
2398 for (j = 0; j < m; j++)
2399 move_termchar(ldata,
2400 ldata->chars + term->curs.x + j,
2401 ldata->chars + term->curs.x + j + n);
2403 copy_termchar(ldata, term->curs.x + m++, &term->erase_char);
2406 move_termchar(ldata,
2407 ldata->chars + term->curs.x + j + n,
2408 ldata->chars + term->curs.x + j);
2410 copy_termchar(ldata, term->curs.x + n, &term->erase_char);
2415 * Toggle terminal mode `mode' to state `state'. (`query' indicates
2416 * whether the mode is a DEC private one or a normal one.)
2418 static void toggle_mode(Terminal *term, int mode, int query, int state)
2422 case 1: /* DECCKM: application cursor keys */
2423 term->app_cursor_keys = state;
2425 case 2: /* DECANM: VT52 mode */
2426 term->vt52_mode = !state;
2427 if (term->vt52_mode) {
2428 term->blink_is_real = FALSE;
2429 term->vt52_bold = FALSE;
2431 term->blink_is_real = term->blinktext;
2433 term_schedule_tblink(term);
2435 case 3: /* DECCOLM: 80/132 columns */
2437 if (!term->no_remote_resize)
2438 request_resize(term->frontend, state ? 132 : 80, term->rows);
2439 term->reset_132 = state;
2440 term->alt_t = term->marg_t = 0;
2441 term->alt_b = term->marg_b = term->rows - 1;
2442 move(term, 0, 0, 0);
2443 erase_lots(term, FALSE, TRUE, TRUE);
2445 case 5: /* DECSCNM: reverse video */
2447 * Toggle reverse video. If we receive an OFF within the
2448 * visual bell timeout period after an ON, we trigger an
2449 * effective visual bell, so that ESC[?5hESC[?5l will
2450 * always be an actually _visible_ visual bell.
2452 if (term->rvideo && !state) {
2453 /* This is an OFF, so set up a vbell */
2454 term_schedule_vbell(term, TRUE, term->rvbell_startpoint);
2455 } else if (!term->rvideo && state) {
2456 /* This is an ON, so we notice the time and save it. */
2457 term->rvbell_startpoint = GETTICKCOUNT();
2459 term->rvideo = state;
2460 seen_disp_event(term);
2462 case 6: /* DECOM: DEC origin mode */
2463 term->dec_om = state;
2465 case 7: /* DECAWM: auto wrap */
2468 case 8: /* DECARM: auto key repeat */
2469 term->repeat_off = !state;
2471 case 10: /* DECEDM: set local edit mode */
2472 term->term_editing = state;
2473 if (term->ldisc) /* cause ldisc to notice changes */
2474 ldisc_send(term->ldisc, NULL, 0, 0);
2476 case 25: /* DECTCEM: enable/disable cursor */
2477 compatibility2(OTHER, VT220);
2478 term->cursor_on = state;
2479 seen_disp_event(term);
2481 case 47: /* alternate screen */
2482 compatibility(OTHER);
2484 swap_screen(term, term->no_alt_screen ? 0 : state, FALSE, FALSE);
2487 case 1000: /* xterm mouse 1 (normal) */
2488 term->xterm_mouse = state ? 1 : 0;
2489 set_raw_mouse_mode(term->frontend, state);
2491 case 1002: /* xterm mouse 2 (inc. button drags) */
2492 term->xterm_mouse = state ? 2 : 0;
2493 set_raw_mouse_mode(term->frontend, state);
2495 case 1006: /* xterm extended mouse */
2496 term->xterm_extended_mouse = state ? 1 : 0;
2498 case 1015: /* urxvt extended mouse */
2499 term->urxvt_extended_mouse = state ? 1 : 0;
2501 case 1047: /* alternate screen */
2502 compatibility(OTHER);
2504 swap_screen(term, term->no_alt_screen ? 0 : state, TRUE, TRUE);
2507 case 1048: /* save/restore cursor */
2508 if (!term->no_alt_screen)
2509 save_cursor(term, state);
2510 if (!state) seen_disp_event(term);
2512 case 1049: /* cursor & alternate screen */
2513 if (state && !term->no_alt_screen)
2514 save_cursor(term, state);
2515 if (!state) seen_disp_event(term);
2516 compatibility(OTHER);
2518 swap_screen(term, term->no_alt_screen ? 0 : state, TRUE, FALSE);
2519 if (!state && !term->no_alt_screen)
2520 save_cursor(term, state);
2523 case 2004: /* xterm bracketed paste */
2524 term->bracketed_paste = state ? TRUE : FALSE;
2528 case 4: /* IRM: set insert mode */
2529 compatibility(VT102);
2530 term->insert = state;
2532 case 12: /* SRM: set echo mode */
2533 term->term_echoing = !state;
2534 if (term->ldisc) /* cause ldisc to notice changes */
2535 ldisc_send(term->ldisc, NULL, 0, 0);
2537 case 20: /* LNM: Return sends ... */
2538 term->cr_lf_return = state;
2540 case 34: /* WYULCURM: Make cursor BIG */
2541 compatibility2(OTHER, VT220);
2542 term->big_cursor = !state;
2547 * Process an OSC sequence: set window title or icon name.
2549 static void do_osc(Terminal *term)
2552 while (term->osc_strlen--)
2553 term->wordness[(unsigned char)
2554 term->osc_string[term->osc_strlen]] = term->esc_args[0];
2556 term->osc_string[term->osc_strlen] = '\0';
2557 switch (term->esc_args[0]) {
2560 if (!term->no_remote_wintitle)
2561 set_icon(term->frontend, term->osc_string);
2562 if (term->esc_args[0] == 1)
2564 /* fall through: parameter 0 means set both */
2567 if (!term->no_remote_wintitle)
2568 set_title(term->frontend, term->osc_string);
2575 * ANSI printing routines.
2577 static void term_print_setup(Terminal *term, char *printer)
2579 bufchain_clear(&term->printer_buf);
2580 term->print_job = printer_start_job(printer);
2582 static void term_print_flush(Terminal *term)
2587 while ((size = bufchain_size(&term->printer_buf)) > 5) {
2588 bufchain_prefix(&term->printer_buf, &data, &len);
2591 printer_job_data(term->print_job, data, len);
2592 bufchain_consume(&term->printer_buf, len);
2595 static void term_print_finish(Terminal *term)
2601 if (!term->printing && !term->only_printing)
2602 return; /* we need do nothing */
2604 term_print_flush(term);
2605 while ((size = bufchain_size(&term->printer_buf)) > 0) {
2606 bufchain_prefix(&term->printer_buf, &data, &len);
2608 if (c == '\033' || c == '\233') {
2609 bufchain_consume(&term->printer_buf, size);
2612 printer_job_data(term->print_job, &c, 1);
2613 bufchain_consume(&term->printer_buf, 1);
2616 printer_finish_job(term->print_job);
2617 term->print_job = NULL;
2618 term->printing = term->only_printing = FALSE;
2622 * Remove everything currently in `inbuf' and stick it up on the
2623 * in-memory display. There's a big state machine in here to
2624 * process escape sequences...
2626 static void term_out(Terminal *term)
2630 unsigned char localbuf[256], *chars;
2635 chars = NULL; /* placate compiler warnings */
2636 while (nchars > 0 || unget != -1 || bufchain_size(&term->inbuf) > 0) {
2640 bufchain_prefix(&term->inbuf, &ret, &nchars);
2641 if (nchars > sizeof(localbuf))
2642 nchars = sizeof(localbuf);
2643 memcpy(localbuf, ret, nchars);
2644 bufchain_consume(&term->inbuf, nchars);
2646 assert(chars != NULL);
2652 * Optionally log the session traffic to a file. Useful for
2653 * debugging and possibly also useful for actual logging.
2655 if (term->logtype == LGTYP_DEBUG && term->logctx)
2656 logtraffic(term->logctx, (unsigned char) c, LGTYP_DEBUG);
2662 /* Note only VT220+ are 8-bit VT102 is seven bit, it shouldn't even
2663 * be able to display 8-bit characters, but I'll let that go 'cause
2668 * If we're printing, add the character to the printer
2671 if (term->printing) {
2672 bufchain_add(&term->printer_buf, &c, 1);
2675 * If we're in print-only mode, we use a much simpler
2676 * state machine designed only to recognise the ESC[4i
2677 * termination sequence.
2679 if (term->only_printing) {
2681 term->print_state = 1;
2682 else if (c == (unsigned char)'\233')
2683 term->print_state = 2;
2684 else if (c == '[' && term->print_state == 1)
2685 term->print_state = 2;
2686 else if (c == '4' && term->print_state == 2)
2687 term->print_state = 3;
2688 else if (c == 'i' && term->print_state == 3)
2689 term->print_state = 4;
2691 term->print_state = 0;
2692 if (term->print_state == 4) {
2693 term_print_finish(term);
2699 /* First see about all those translations. */
2700 if (term->termstate == TOPLEVEL) {
2702 switch (term->utf_state) {
2705 /* UTF-8 must be stateless so we ignore iso2022. */
2706 if (term->ucsdata->unitab_ctrl[c] != 0xFF)
2707 c = term->ucsdata->unitab_ctrl[c];
2708 else c = ((unsigned char)c) | CSET_ASCII;
2710 } else if ((c & 0xe0) == 0xc0) {
2711 term->utf_size = term->utf_state = 1;
2712 term->utf_char = (c & 0x1f);
2713 } else if ((c & 0xf0) == 0xe0) {
2714 term->utf_size = term->utf_state = 2;
2715 term->utf_char = (c & 0x0f);
2716 } else if ((c & 0xf8) == 0xf0) {
2717 term->utf_size = term->utf_state = 3;
2718 term->utf_char = (c & 0x07);
2719 } else if ((c & 0xfc) == 0xf8) {
2720 term->utf_size = term->utf_state = 4;
2721 term->utf_char = (c & 0x03);
2722 } else if ((c & 0xfe) == 0xfc) {
2723 term->utf_size = term->utf_state = 5;
2724 term->utf_char = (c & 0x01);
2735 if ((c & 0xC0) != 0x80) {
2738 term->utf_state = 0;
2741 term->utf_char = (term->utf_char << 6) | (c & 0x3f);
2742 if (--term->utf_state)
2747 /* Is somebody trying to be evil! */
2749 (c < 0x800 && term->utf_size >= 2) ||
2750 (c < 0x10000 && term->utf_size >= 3) ||
2751 (c < 0x200000 && term->utf_size >= 4) ||
2752 (c < 0x4000000 && term->utf_size >= 5))
2755 /* Unicode line separator and paragraph separator are CR-LF */
2756 if (c == 0x2028 || c == 0x2029)
2759 /* High controls are probably a Baaad idea too. */
2763 /* The UTF-16 surrogates are not nice either. */
2764 /* The standard give the option of decoding these:
2765 * I don't want to! */
2766 if (c >= 0xD800 && c < 0xE000)
2769 /* ISO 10646 characters now limited to UTF-16 range. */
2773 /* This is currently a TagPhobic application.. */
2774 if (c >= 0xE0000 && c <= 0xE007F)
2777 /* U+FEFF is best seen as a null. */
2780 /* But U+FFFE is an error. */
2781 if (c == 0xFFFE || c == 0xFFFF)
2786 /* Are we in the nasty ACS mode? Note: no sco in utf mode. */
2787 else if(term->sco_acs &&
2788 (c!='\033' && c!='\012' && c!='\015' && c!='\b'))
2790 if (term->sco_acs == 2) c |= 0x80;
2793 switch (term->cset_attr[term->cset]) {
2795 * Linedraw characters are different from 'ESC ( B'
2796 * only for a small range. For ones outside that
2797 * range, make sure we use the same font as well as
2798 * the same encoding.
2801 if (term->ucsdata->unitab_ctrl[c] != 0xFF)
2802 c = term->ucsdata->unitab_ctrl[c];
2804 c = ((unsigned char) c) | CSET_LINEDRW;
2808 /* If UK-ASCII, make the '#' a LineDraw Pound */
2810 c = '}' | CSET_LINEDRW;
2813 /*FALLTHROUGH*/ case CSET_ASCII:
2814 if (term->ucsdata->unitab_ctrl[c] != 0xFF)
2815 c = term->ucsdata->unitab_ctrl[c];
2817 c = ((unsigned char) c) | CSET_ASCII;
2820 if (c>=' ') c = ((unsigned char)c) | CSET_SCOACS;
2827 * How about C1 controls?
2828 * Explicitly ignore SCI (0x9a), which we don't translate to DECID.
2830 if ((c & -32) == 0x80 && term->termstate < DO_CTRLS &&
2831 !term->vt52_mode && has_compat(VT220)) {
2835 term->termstate = SEEN_ESC;
2836 term->esc_query = FALSE;
2837 c = '@' + (c & 0x1F);
2841 /* Or the GL control. */
2842 if (c == '\177' && term->termstate < DO_CTRLS && has_compat(OTHER)) {
2843 if (term->curs.x && !term->wrapnext)
2845 term->wrapnext = FALSE;
2846 /* destructive backspace might be disabled */
2847 if (!term->no_dbackspace) {
2848 check_boundary(term, term->curs.x, term->curs.y);
2849 check_boundary(term, term->curs.x+1, term->curs.y);
2850 copy_termchar(scrlineptr(term->curs.y),
2851 term->curs.x, &term->erase_char);
2854 /* Or normal C0 controls. */
2855 if ((c & ~0x1F) == 0 && term->termstate < DO_CTRLS) {
2857 case '\005': /* ENQ: terminal type query */
2859 * Strictly speaking this is VT100 but a VT100 defaults to
2860 * no response. Other terminals respond at their option.
2862 * Don't put a CR in the default string as this tends to
2863 * upset some weird software.
2865 compatibility(ANSIMIN);
2867 lpage_send(term->ldisc, DEFAULT_CODEPAGE,
2868 term->answerback, term->answerbacklen, 0);
2871 case '\007': /* BEL: Bell */
2873 struct beeptime *newbeep;
2874 unsigned long ticks;
2876 ticks = GETTICKCOUNT();
2878 if (!term->beep_overloaded) {
2879 newbeep = snew(struct beeptime);
2880 newbeep->ticks = ticks;
2881 newbeep->next = NULL;
2882 if (!term->beephead)
2883 term->beephead = newbeep;
2885 term->beeptail->next = newbeep;
2886 term->beeptail = newbeep;
2891 * Throw out any beeps that happened more than
2894 while (term->beephead &&
2895 term->beephead->ticks < ticks - term->bellovl_t) {
2896 struct beeptime *tmp = term->beephead;
2897 term->beephead = tmp->next;
2899 if (!term->beephead)
2900 term->beeptail = NULL;
2904 if (term->bellovl && term->beep_overloaded &&
2905 ticks - term->lastbeep >= (unsigned)term->bellovl_s) {
2907 * If we're currently overloaded and the
2908 * last beep was more than s seconds ago,
2909 * leave overload mode.
2911 term->beep_overloaded = FALSE;
2912 } else if (term->bellovl && !term->beep_overloaded &&
2913 term->nbeeps >= term->bellovl_n) {
2915 * Now, if we have n or more beeps
2916 * remaining in the queue, go into overload
2919 term->beep_overloaded = TRUE;
2921 term->lastbeep = ticks;
2924 * Perform an actual beep if we're not overloaded.
2926 if (!term->bellovl || !term->beep_overloaded) {
2927 do_beep(term->frontend, term->beep);
2929 if (term->beep == BELL_VISUAL) {
2930 term_schedule_vbell(term, FALSE, 0);
2933 seen_disp_event(term);
2936 case '\b': /* BS: Back space */
2937 if (term->curs.x == 0 &&
2938 (term->curs.y == 0 || term->wrap == 0))
2940 else if (term->curs.x == 0 && term->curs.y > 0)
2941 term->curs.x = term->cols - 1, term->curs.y--;
2942 else if (term->wrapnext)
2943 term->wrapnext = FALSE;
2946 seen_disp_event(term);
2948 case '\016': /* LS1: Locking-shift one */
2949 compatibility(VT100);
2952 case '\017': /* LS0: Locking-shift zero */
2953 compatibility(VT100);
2956 case '\033': /* ESC: Escape */
2957 if (term->vt52_mode)
2958 term->termstate = VT52_ESC;
2960 compatibility(ANSIMIN);
2961 term->termstate = SEEN_ESC;
2962 term->esc_query = FALSE;
2965 case '\015': /* CR: Carriage return */
2967 term->wrapnext = FALSE;
2968 seen_disp_event(term);
2970 if (term->crhaslf) {
2971 if (term->curs.y == term->marg_b)
2972 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
2973 else if (term->curs.y < term->rows - 1)
2977 logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
2979 case '\014': /* FF: Form feed */
2980 if (has_compat(SCOANSI)) {
2981 move(term, 0, 0, 0);
2982 erase_lots(term, FALSE, FALSE, TRUE);
2984 term->wrapnext = FALSE;
2985 seen_disp_event(term);
2988 case '\013': /* VT: Line tabulation */
2989 compatibility(VT100);
2990 case '\012': /* LF: Line feed */
2991 if (term->curs.y == term->marg_b)
2992 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
2993 else if (term->curs.y < term->rows - 1)
2997 term->wrapnext = FALSE;
2998 seen_disp_event(term);
3000 logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
3002 case '\t': /* HT: Character tabulation */
3004 pos old_curs = term->curs;
3005 termline *ldata = scrlineptr(term->curs.y);
3009 } while (term->curs.x < term->cols - 1 &&
3010 !term->tabs[term->curs.x]);
3012 if ((ldata->lattr & LATTR_MODE) != LATTR_NORM) {
3013 if (term->curs.x >= term->cols / 2)
3014 term->curs.x = term->cols / 2 - 1;
3016 if (term->curs.x >= term->cols)
3017 term->curs.x = term->cols - 1;
3020 check_selection(term, old_curs, term->curs);
3022 seen_disp_event(term);
3026 switch (term->termstate) {
3028 /* Only graphic characters get this far;
3029 * ctrls are stripped above */
3031 termline *cline = scrlineptr(term->curs.y);
3036 width = (term->cjk_ambig_wide ?
3037 mk_wcwidth_cjk((unsigned int) c) :
3038 mk_wcwidth((unsigned int) c));
3040 if (term->wrapnext && term->wrap && width > 0) {
3041 cline->lattr |= LATTR_WRAPPED;
3042 if (term->curs.y == term->marg_b)
3043 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3044 else if (term->curs.y < term->rows - 1)
3047 term->wrapnext = FALSE;
3048 cline = scrlineptr(term->curs.y);
3050 if (term->insert && width > 0)
3052 if (term->selstate != NO_SELECTION) {
3053 pos cursplus = term->curs;
3055 check_selection(term, term->curs, cursplus);
3057 if (((c & CSET_MASK) == CSET_ASCII ||
3058 (c & CSET_MASK) == 0) &&
3060 logtraffic(term->logctx, (unsigned char) c,
3066 * If we're about to display a double-width
3067 * character starting in the rightmost
3068 * column, then we do something special
3069 * instead. We must print a space in the
3070 * last column of the screen, then wrap;
3071 * and we also set LATTR_WRAPPED2 which
3072 * instructs subsequent cut-and-pasting not
3073 * only to splice this line to the one
3074 * after it, but to ignore the space in the
3075 * last character position as well.
3076 * (Because what was actually output to the
3077 * terminal was presumably just a sequence
3078 * of CJK characters, and we don't want a
3079 * space to be pasted in the middle of
3080 * those just because they had the
3081 * misfortune to start in the wrong parity
3082 * column. xterm concurs.)
3084 check_boundary(term, term->curs.x, term->curs.y);
3085 check_boundary(term, term->curs.x+2, term->curs.y);
3086 if (term->curs.x == term->cols-1) {
3087 copy_termchar(cline, term->curs.x,
3089 cline->lattr |= LATTR_WRAPPED | LATTR_WRAPPED2;
3090 if (term->curs.y == term->marg_b)
3091 scroll(term, term->marg_t, term->marg_b,
3093 else if (term->curs.y < term->rows - 1)
3096 cline = scrlineptr(term->curs.y);
3097 /* Now we must check_boundary again, of course. */
3098 check_boundary(term, term->curs.x, term->curs.y);
3099 check_boundary(term, term->curs.x+2, term->curs.y);
3103 clear_cc(cline, term->curs.x);
3104 cline->chars[term->curs.x].chr = c;
3105 cline->chars[term->curs.x].attr = term->curr_attr;
3110 clear_cc(cline, term->curs.x);
3111 cline->chars[term->curs.x].chr = UCSWIDE;
3112 cline->chars[term->curs.x].attr = term->curr_attr;
3116 check_boundary(term, term->curs.x, term->curs.y);
3117 check_boundary(term, term->curs.x+1, term->curs.y);
3120 clear_cc(cline, term->curs.x);
3121 cline->chars[term->curs.x].chr = c;
3122 cline->chars[term->curs.x].attr = term->curr_attr;
3126 if (term->curs.x > 0) {
3127 int x = term->curs.x - 1;
3129 /* If we're in wrapnext state, the character
3130 * to combine with is _here_, not to our left. */
3135 * If the previous character is
3136 * UCSWIDE, back up another one.
3138 if (cline->chars[x].chr == UCSWIDE) {
3143 add_cc(cline, x, c);
3144 seen_disp_event(term);
3151 if (term->curs.x == term->cols) {
3153 term->wrapnext = TRUE;
3154 if (term->wrap && term->vt52_mode) {
3155 cline->lattr |= LATTR_WRAPPED;
3156 if (term->curs.y == term->marg_b)
3157 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3158 else if (term->curs.y < term->rows - 1)
3161 term->wrapnext = FALSE;
3164 seen_disp_event(term);
3170 * This state is virtually identical to SEEN_ESC, with the
3171 * exception that we have an OSC sequence in the pipeline,
3172 * and _if_ we see a backslash, we process it.
3176 term->termstate = TOPLEVEL;
3179 /* else fall through */
3181 if (c >= ' ' && c <= '/') {
3182 if (term->esc_query)
3183 term->esc_query = -1;
3185 term->esc_query = c;
3188 term->termstate = TOPLEVEL;
3189 switch (ANSI(c, term->esc_query)) {
3190 case '[': /* enter CSI mode */
3191 term->termstate = SEEN_CSI;
3192 term->esc_nargs = 1;
3193 term->esc_args[0] = ARG_DEFAULT;
3194 term->esc_query = FALSE;
3196 case ']': /* OSC: xterm escape sequences */
3197 /* Compatibility is nasty here, xterm, linux, decterm yuk! */
3198 compatibility(OTHER);
3199 term->termstate = SEEN_OSC;
3200 term->esc_args[0] = 0;
3202 case '7': /* DECSC: save cursor */
3203 compatibility(VT100);
3204 save_cursor(term, TRUE);
3206 case '8': /* DECRC: restore cursor */
3207 compatibility(VT100);
3208 save_cursor(term, FALSE);
3209 seen_disp_event(term);
3211 case '=': /* DECKPAM: Keypad application mode */
3212 compatibility(VT100);
3213 term->app_keypad_keys = TRUE;
3215 case '>': /* DECKPNM: Keypad numeric mode */
3216 compatibility(VT100);
3217 term->app_keypad_keys = FALSE;
3219 case 'D': /* IND: exactly equivalent to LF */
3220 compatibility(VT100);
3221 if (term->curs.y == term->marg_b)
3222 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3223 else if (term->curs.y < term->rows - 1)
3225 term->wrapnext = FALSE;
3226 seen_disp_event(term);
3228 case 'E': /* NEL: exactly equivalent to CR-LF */
3229 compatibility(VT100);
3231 if (term->curs.y == term->marg_b)
3232 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3233 else if (term->curs.y < term->rows - 1)
3235 term->wrapnext = FALSE;
3236 seen_disp_event(term);
3238 case 'M': /* RI: reverse index - backwards LF */
3239 compatibility(VT100);
3240 if (term->curs.y == term->marg_t)
3241 scroll(term, term->marg_t, term->marg_b, -1, TRUE);
3242 else if (term->curs.y > 0)
3244 term->wrapnext = FALSE;
3245 seen_disp_event(term);
3247 case 'Z': /* DECID: terminal type query */
3248 compatibility(VT100);
3250 ldisc_send(term->ldisc, term->id_string,
3251 strlen(term->id_string), 0);
3253 case 'c': /* RIS: restore power-on settings */
3254 compatibility(VT100);
3255 power_on(term, TRUE);
3256 if (term->ldisc) /* cause ldisc to notice changes */
3257 ldisc_send(term->ldisc, NULL, 0, 0);
3258 if (term->reset_132) {
3259 if (!term->no_remote_resize)
3260 request_resize(term->frontend, 80, term->rows);
3261 term->reset_132 = 0;
3264 seen_disp_event(term);
3266 case 'H': /* HTS: set a tab */
3267 compatibility(VT100);
3268 term->tabs[term->curs.x] = TRUE;
3271 case ANSI('8', '#'): /* DECALN: fills screen with Es :-) */
3272 compatibility(VT100);
3278 for (i = 0; i < term->rows; i++) {
3279 ldata = scrlineptr(i);
3280 for (j = 0; j < term->cols; j++) {
3281 copy_termchar(ldata, j,
3282 &term->basic_erase_char);
3283 ldata->chars[j].chr = 'E';
3285 ldata->lattr = LATTR_NORM;
3288 seen_disp_event(term);
3289 scrtop.x = scrtop.y = 0;
3291 scrbot.y = term->rows;
3292 check_selection(term, scrtop, scrbot);
3296 case ANSI('3', '#'):
3297 case ANSI('4', '#'):
3298 case ANSI('5', '#'):
3299 case ANSI('6', '#'):
3300 compatibility(VT100);
3304 switch (ANSI(c, term->esc_query)) {
3305 case ANSI('3', '#'): /* DECDHL: 2*height, top */
3308 case ANSI('4', '#'): /* DECDHL: 2*height, bottom */
3311 case ANSI('5', '#'): /* DECSWL: normal */
3312 nlattr = LATTR_NORM;
3314 default: /* case ANSI('6', '#'): DECDWL: 2*width */
3315 nlattr = LATTR_WIDE;
3318 scrlineptr(term->curs.y)->lattr = nlattr;
3321 /* GZD4: G0 designate 94-set */
3322 case ANSI('A', '('):
3323 compatibility(VT100);
3324 if (!term->no_remote_charset)
3325 term->cset_attr[0] = CSET_GBCHR;
3327 case ANSI('B', '('):
3328 compatibility(VT100);
3329 if (!term->no_remote_charset)
3330 term->cset_attr[0] = CSET_ASCII;
3332 case ANSI('0', '('):
3333 compatibility(VT100);
3334 if (!term->no_remote_charset)
3335 term->cset_attr[0] = CSET_LINEDRW;
3337 case ANSI('U', '('):
3338 compatibility(OTHER);
3339 if (!term->no_remote_charset)
3340 term->cset_attr[0] = CSET_SCOACS;
3342 /* G1D4: G1-designate 94-set */
3343 case ANSI('A', ')'):
3344 compatibility(VT100);
3345 if (!term->no_remote_charset)
3346 term->cset_attr[1] = CSET_GBCHR;
3348 case ANSI('B', ')'):
3349 compatibility(VT100);
3350 if (!term->no_remote_charset)
3351 term->cset_attr[1] = CSET_ASCII;
3353 case ANSI('0', ')'):
3354 compatibility(VT100);
3355 if (!term->no_remote_charset)
3356 term->cset_attr[1] = CSET_LINEDRW;
3358 case ANSI('U', ')'):
3359 compatibility(OTHER);
3360 if (!term->no_remote_charset)
3361 term->cset_attr[1] = CSET_SCOACS;
3363 /* DOCS: Designate other coding system */
3364 case ANSI('8', '%'): /* Old Linux code */
3365 case ANSI('G', '%'):
3366 compatibility(OTHER);
3367 if (!term->no_remote_charset)
3370 case ANSI('@', '%'):
3371 compatibility(OTHER);
3372 if (!term->no_remote_charset)
3378 term->termstate = TOPLEVEL; /* default */
3380 if (term->esc_nargs <= ARGS_MAX) {
3381 if (term->esc_args[term->esc_nargs - 1] == ARG_DEFAULT)
3382 term->esc_args[term->esc_nargs - 1] = 0;
3383 term->esc_args[term->esc_nargs - 1] =
3384 10 * term->esc_args[term->esc_nargs - 1] + c - '0';
3386 term->termstate = SEEN_CSI;
3387 } else if (c == ';') {
3388 if (term->esc_nargs < ARGS_MAX)
3389 term->esc_args[term->esc_nargs++] = ARG_DEFAULT;
3390 term->termstate = SEEN_CSI;
3391 } else if (c < '@') {
3392 if (term->esc_query)
3393 term->esc_query = -1;
3395 term->esc_query = TRUE;
3397 term->esc_query = c;
3398 term->termstate = SEEN_CSI;
3400 switch (ANSI(c, term->esc_query)) {
3401 case 'A': /* CUU: move up N lines */
3402 move(term, term->curs.x,
3403 term->curs.y - def(term->esc_args[0], 1), 1);
3404 seen_disp_event(term);
3406 case 'e': /* VPR: move down N lines */
3407 compatibility(ANSI);
3409 case 'B': /* CUD: Cursor down */
3410 move(term, term->curs.x,
3411 term->curs.y + def(term->esc_args[0], 1), 1);
3412 seen_disp_event(term);
3414 case ANSI('c', '>'): /* DA: report xterm version */
3415 compatibility(OTHER);
3416 /* this reports xterm version 136 so that VIM can
3417 use the drag messages from the mouse reporting */
3419 ldisc_send(term->ldisc, "\033[>0;136;0c", 11, 0);
3421 case 'a': /* HPR: move right N cols */
3422 compatibility(ANSI);
3424 case 'C': /* CUF: Cursor right */
3425 move(term, term->curs.x + def(term->esc_args[0], 1),
3427 seen_disp_event(term);
3429 case 'D': /* CUB: move left N cols */
3430 move(term, term->curs.x - def(term->esc_args[0], 1),
3432 seen_disp_event(term);
3434 case 'E': /* CNL: move down N lines and CR */
3435 compatibility(ANSI);
3437 term->curs.y + def(term->esc_args[0], 1), 1);
3438 seen_disp_event(term);
3440 case 'F': /* CPL: move up N lines and CR */
3441 compatibility(ANSI);
3443 term->curs.y - def(term->esc_args[0], 1), 1);
3444 seen_disp_event(term);
3447 case '`': /* HPA: set horizontal posn */
3448 compatibility(ANSI);
3449 move(term, def(term->esc_args[0], 1) - 1,
3451 seen_disp_event(term);
3453 case 'd': /* VPA: set vertical posn */
3454 compatibility(ANSI);
3455 move(term, term->curs.x,
3456 ((term->dec_om ? term->marg_t : 0) +
3457 def(term->esc_args[0], 1) - 1),
3458 (term->dec_om ? 2 : 0));
3459 seen_disp_event(term);
3462 case 'f': /* HVP: set horz and vert posns at once */
3463 if (term->esc_nargs < 2)
3464 term->esc_args[1] = ARG_DEFAULT;
3465 move(term, def(term->esc_args[1], 1) - 1,
3466 ((term->dec_om ? term->marg_t : 0) +
3467 def(term->esc_args[0], 1) - 1),
3468 (term->dec_om ? 2 : 0));
3469 seen_disp_event(term);
3471 case 'J': /* ED: erase screen or parts of it */
3473 unsigned int i = def(term->esc_args[0], 0);
3475 /* Erase Saved Lines (xterm)
3476 * This follows Thomas Dickey's xterm. */
3482 erase_lots(term, FALSE, !!(i & 2), !!(i & 1));
3486 seen_disp_event(term);
3488 case 'K': /* EL: erase line or parts of it */
3490 unsigned int i = def(term->esc_args[0], 0) + 1;
3493 erase_lots(term, TRUE, !!(i & 2), !!(i & 1));
3495 seen_disp_event(term);
3497 case 'L': /* IL: insert lines */
3498 compatibility(VT102);
3499 if (term->curs.y <= term->marg_b)
3500 scroll(term, term->curs.y, term->marg_b,
3501 -def(term->esc_args[0], 1), FALSE);
3502 seen_disp_event(term);
3504 case 'M': /* DL: delete lines */
3505 compatibility(VT102);
3506 if (term->curs.y <= term->marg_b)
3507 scroll(term, term->curs.y, term->marg_b,
3508 def(term->esc_args[0], 1),
3510 seen_disp_event(term);
3512 case '@': /* ICH: insert chars */
3513 /* XXX VTTEST says this is vt220, vt510 manual says vt102 */
3514 compatibility(VT102);
3515 insch(term, def(term->esc_args[0], 1));
3516 seen_disp_event(term);
3518 case 'P': /* DCH: delete chars */
3519 compatibility(VT102);
3520 insch(term, -def(term->esc_args[0], 1));
3521 seen_disp_event(term);
3523 case 'c': /* DA: terminal type query */
3524 compatibility(VT100);
3525 /* This is the response for a VT102 */
3527 ldisc_send(term->ldisc, term->id_string,
3528 strlen(term->id_string), 0);
3530 case 'n': /* DSR: cursor position query */
3532 if (term->esc_args[0] == 6) {
3534 sprintf(buf, "\033[%d;%dR", term->curs.y + 1,
3536 ldisc_send(term->ldisc, buf, strlen(buf), 0);
3537 } else if (term->esc_args[0] == 5) {
3538 ldisc_send(term->ldisc, "\033[0n", 4, 0);
3542 case 'h': /* SM: toggle modes to high */
3544 compatibility(VT100);
3547 for (i = 0; i < term->esc_nargs; i++)
3548 toggle_mode(term, term->esc_args[i],
3549 term->esc_query, TRUE);
3552 case 'i': /* MC: Media copy */
3554 compatibility(VT100);
3557 if (term->esc_nargs != 1) break;
3558 if (term->esc_args[0] == 5 &&
3559 (printer = conf_get_str(term->conf,
3560 CONF_printer))[0]) {
3561 term->printing = TRUE;
3562 term->only_printing = !term->esc_query;
3563 term->print_state = 0;
3564 term_print_setup(term, printer);
3565 } else if (term->esc_args[0] == 4 &&
3567 term_print_finish(term);
3571 case 'l': /* RM: toggle modes to low */
3573 compatibility(VT100);
3576 for (i = 0; i < term->esc_nargs; i++)
3577 toggle_mode(term, term->esc_args[i],
3578 term->esc_query, FALSE);
3581 case 'g': /* TBC: clear tabs */
3582 compatibility(VT100);
3583 if (term->esc_nargs == 1) {
3584 if (term->esc_args[0] == 0) {
3585 term->tabs[term->curs.x] = FALSE;
3586 } else if (term->esc_args[0] == 3) {
3588 for (i = 0; i < term->cols; i++)
3589 term->tabs[i] = FALSE;
3593 case 'r': /* DECSTBM: set scroll margins */
3594 compatibility(VT100);
3595 if (term->esc_nargs <= 2) {
3597 top = def(term->esc_args[0], 1) - 1;
3598 bot = (term->esc_nargs <= 1
3599 || term->esc_args[1] == 0 ?
3601 def(term->esc_args[1], term->rows)) - 1;
3602 if (bot >= term->rows)
3603 bot = term->rows - 1;
3604 /* VTTEST Bug 9 - if region is less than 2 lines
3605 * don't change region.
3607 if (bot - top > 0) {
3612 * I used to think the cursor should be
3613 * placed at the top of the newly marginned
3614 * area. Apparently not: VMS TPU falls over
3617 * Well actually it should for
3620 term->curs.y = (term->dec_om ?
3622 seen_disp_event(term);
3626 case 'm': /* SGR: set graphics rendition */
3629 * A VT100 without the AVO only had one
3630 * attribute, either underline or
3631 * reverse video depending on the
3632 * cursor type, this was selected by
3636 * This is sometimes DIM, eg on the
3639 * This is sometimes INVIS various ANSI.
3641 * This like 22 disables BOLD, DIM and INVIS
3643 * The ANSI colours appear on any
3644 * terminal that has colour (obviously)
3645 * but the interaction between sgr0 and
3646 * the colours varies but is usually
3647 * related to the background colour
3648 * erase item. The interaction between
3649 * colour attributes and the mono ones
3650 * is also very implementation
3653 * The 39 and 49 attributes are likely
3654 * to be unimplemented.
3657 for (i = 0; i < term->esc_nargs; i++) {
3658 switch (def(term->esc_args[i], 0)) {
3659 case 0: /* restore defaults */
3660 term->curr_attr = term->default_attr;
3662 case 1: /* enable bold */
3663 compatibility(VT100AVO);
3664 term->curr_attr |= ATTR_BOLD;
3666 case 21: /* (enable double underline) */
3667 compatibility(OTHER);
3668 case 4: /* enable underline */
3669 compatibility(VT100AVO);
3670 term->curr_attr |= ATTR_UNDER;
3672 case 5: /* enable blink */
3673 compatibility(VT100AVO);
3674 term->curr_attr |= ATTR_BLINK;
3676 case 6: /* SCO light bkgrd */
3677 compatibility(SCOANSI);
3678 term->blink_is_real = FALSE;
3679 term->curr_attr |= ATTR_BLINK;
3680 term_schedule_tblink(term);
3682 case 7: /* enable reverse video */
3683 term->curr_attr |= ATTR_REVERSE;
3685 case 10: /* SCO acs off */
3686 compatibility(SCOANSI);
3687 if (term->no_remote_charset) break;
3688 term->sco_acs = 0; break;
3689 case 11: /* SCO acs on */
3690 compatibility(SCOANSI);
3691 if (term->no_remote_charset) break;
3692 term->sco_acs = 1; break;
3693 case 12: /* SCO acs on, |0x80 */
3694 compatibility(SCOANSI);
3695 if (term->no_remote_charset) break;
3696 term->sco_acs = 2; break;
3697 case 22: /* disable bold */
3698 compatibility2(OTHER, VT220);
3699 term->curr_attr &= ~ATTR_BOLD;
3701 case 24: /* disable underline */
3702 compatibility2(OTHER, VT220);
3703 term->curr_attr &= ~ATTR_UNDER;
3705 case 25: /* disable blink */
3706 compatibility2(OTHER, VT220);
3707 term->curr_attr &= ~ATTR_BLINK;
3709 case 27: /* disable reverse video */
3710 compatibility2(OTHER, VT220);
3711 term->curr_attr &= ~ATTR_REVERSE;
3722 term->curr_attr &= ~ATTR_FGMASK;
3724 (term->esc_args[i] - 30)<<ATTR_FGSHIFT;
3734 /* aixterm-style bright foreground */
3735 term->curr_attr &= ~ATTR_FGMASK;
3737 ((term->esc_args[i] - 90 + 8)
3740 case 39: /* default-foreground */
3741 term->curr_attr &= ~ATTR_FGMASK;
3742 term->curr_attr |= ATTR_DEFFG;
3753 term->curr_attr &= ~ATTR_BGMASK;
3755 (term->esc_args[i] - 40)<<ATTR_BGSHIFT;
3765 /* aixterm-style bright background */
3766 term->curr_attr &= ~ATTR_BGMASK;
3768 ((term->esc_args[i] - 100 + 8)
3771 case 49: /* default-background */
3772 term->curr_attr &= ~ATTR_BGMASK;
3773 term->curr_attr |= ATTR_DEFBG;
3775 case 38: /* xterm 256-colour mode */
3776 if (i+2 < term->esc_nargs &&
3777 term->esc_args[i+1] == 5) {
3778 term->curr_attr &= ~ATTR_FGMASK;
3780 ((term->esc_args[i+2] & 0xFF)
3785 case 48: /* xterm 256-colour mode */
3786 if (i+2 < term->esc_nargs &&
3787 term->esc_args[i+1] == 5) {
3788 term->curr_attr &= ~ATTR_BGMASK;
3790 ((term->esc_args[i+2] & 0xFF)
3797 set_erase_char(term);
3800 case 's': /* save cursor */
3801 save_cursor(term, TRUE);
3803 case 'u': /* restore cursor */
3804 save_cursor(term, FALSE);
3805 seen_disp_event(term);
3807 case 't': /* DECSLPP: set page size - ie window height */
3809 * VT340/VT420 sequence DECSLPP, DEC only allows values
3810 * 24/25/36/48/72/144 other emulators (eg dtterm) use
3811 * illegal values (eg first arg 1..9) for window changing
3814 if (term->esc_nargs <= 1
3815 && (term->esc_args[0] < 1 ||
3816 term->esc_args[0] >= 24)) {
3817 compatibility(VT340TEXT);
3818 if (!term->no_remote_resize)
3819 request_resize(term->frontend, term->cols,
3820 def(term->esc_args[0], 24));
3822 } else if (term->esc_nargs >= 1 &&
3823 term->esc_args[0] >= 1 &&
3824 term->esc_args[0] < 24) {
3825 compatibility(OTHER);
3827 switch (term->esc_args[0]) {
3831 set_iconic(term->frontend, FALSE);
3834 set_iconic(term->frontend, TRUE);
3837 if (term->esc_nargs >= 3) {
3838 if (!term->no_remote_resize)
3839 move_window(term->frontend,
3840 def(term->esc_args[1], 0),
3841 def(term->esc_args[2], 0));
3845 /* We should resize the window to a given
3846 * size in pixels here, but currently our
3847 * resizing code isn't healthy enough to
3852 set_zorder(term->frontend, TRUE);
3855 /* move to bottom */
3856 set_zorder(term->frontend, FALSE);
3859 refresh_window(term->frontend);
3862 if (term->esc_nargs >= 3) {
3863 if (!term->no_remote_resize)
3864 request_resize(term->frontend,
3865 def(term->esc_args[2], term->conf_width),
3866 def(term->esc_args[1], term->conf_height));
3870 if (term->esc_nargs >= 2)
3871 set_zoomed(term->frontend,
3877 ldisc_send(term->ldisc,
3878 is_iconic(term->frontend) ?
3879 "\033[2t" : "\033[1t", 4, 0);
3883 get_window_pos(term->frontend, &x, &y);
3884 len = sprintf(buf, "\033[3;%d;%dt", x, y);
3885 ldisc_send(term->ldisc, buf, len, 0);
3890 get_window_pixels(term->frontend, &x, &y);
3891 len = sprintf(buf, "\033[4;%d;%dt", y, x);
3892 ldisc_send(term->ldisc, buf, len, 0);
3897 len = sprintf(buf, "\033[8;%d;%dt",
3898 term->rows, term->cols);
3899 ldisc_send(term->ldisc, buf, len, 0);
3904 * Hmmm. Strictly speaking we
3905 * should return `the size of the
3906 * screen in characters', but
3907 * that's not easy: (a) window
3908 * furniture being what it is it's
3909 * hard to compute, and (b) in
3910 * resize-font mode maximising the
3911 * window wouldn't change the
3912 * number of characters. *shrug*. I
3913 * think we'll ignore it for the
3914 * moment and see if anyone
3915 * complains, and then ask them
3916 * what they would like it to do.
3921 term->remote_qtitle_action != TITLE_NONE) {
3922 if(term->remote_qtitle_action == TITLE_REAL)
3923 p = get_window_title(term->frontend, TRUE);
3925 p = EMPTY_WINDOW_TITLE;
3927 ldisc_send(term->ldisc, "\033]L", 3, 0);
3928 ldisc_send(term->ldisc, p, len, 0);
3929 ldisc_send(term->ldisc, "\033\\", 2, 0);
3934 term->remote_qtitle_action != TITLE_NONE) {
3935 if(term->remote_qtitle_action == TITLE_REAL)
3936 p = get_window_title(term->frontend, FALSE);
3938 p = EMPTY_WINDOW_TITLE;
3940 ldisc_send(term->ldisc, "\033]l", 3, 0);
3941 ldisc_send(term->ldisc, p, len, 0);
3942 ldisc_send(term->ldisc, "\033\\", 2, 0);
3948 case 'S': /* SU: Scroll up */
3949 compatibility(SCOANSI);
3950 scroll(term, term->marg_t, term->marg_b,
3951 def(term->esc_args[0], 1), TRUE);
3952 term->wrapnext = FALSE;
3953 seen_disp_event(term);
3955 case 'T': /* SD: Scroll down */
3956 compatibility(SCOANSI);
3957 scroll(term, term->marg_t, term->marg_b,
3958 -def(term->esc_args[0], 1), TRUE);
3959 term->wrapnext = FALSE;
3960 seen_disp_event(term);
3962 case ANSI('|', '*'): /* DECSNLS */
3964 * Set number of lines on screen
3965 * VT420 uses VGA like hardware and can
3966 * support any size in reasonable range
3967 * (24..49 AIUI) with no default specified.
3969 compatibility(VT420);
3970 if (term->esc_nargs == 1 && term->esc_args[0] > 0) {
3971 if (!term->no_remote_resize)
3972 request_resize(term->frontend, term->cols,
3973 def(term->esc_args[0],
3974 term->conf_height));
3978 case ANSI('|', '$'): /* DECSCPP */
3980 * Set number of columns per page
3981 * Docs imply range is only 80 or 132, but
3984 compatibility(VT340TEXT);
3985 if (term->esc_nargs <= 1) {
3986 if (!term->no_remote_resize)
3987 request_resize(term->frontend,
3988 def(term->esc_args[0],
3994 case 'X': /* ECH: write N spaces w/o moving cursor */
3995 /* XXX VTTEST says this is vt220, vt510 manual
3997 compatibility(ANSIMIN);
3999 int n = def(term->esc_args[0], 1);
4001 int p = term->curs.x;
4002 termline *cline = scrlineptr(term->curs.y);
4004 if (n > term->cols - term->curs.x)
4005 n = term->cols - term->curs.x;
4006 cursplus = term->curs;
4008 check_boundary(term, term->curs.x, term->curs.y);
4009 check_boundary(term, term->curs.x+n, term->curs.y);
4010 check_selection(term, term->curs, cursplus);
4012 copy_termchar(cline, p++,
4014 seen_disp_event(term);
4017 case 'x': /* DECREQTPARM: report terminal characteristics */
4018 compatibility(VT100);
4021 int i = def(term->esc_args[0], 0);
4022 if (i == 0 || i == 1) {
4023 strcpy(buf, "\033[2;1;1;112;112;1;0x");
4025 ldisc_send(term->ldisc, buf, 20, 0);
4030 compatibility(OTHER);
4032 int i = def(term->esc_args[0], 1);
4033 pos old_curs = term->curs;
4035 for(;i>0 && term->curs.x>0; i--) {
4038 } while (term->curs.x >0 &&
4039 !term->tabs[term->curs.x]);
4041 check_selection(term, old_curs, term->curs);
4044 case ANSI('c', '='): /* Hide or Show Cursor */
4045 compatibility(SCOANSI);
4046 switch(term->esc_args[0]) {
4047 case 0: /* hide cursor */
4048 term->cursor_on = FALSE;
4050 case 1: /* restore cursor */
4051 term->big_cursor = FALSE;
4052 term->cursor_on = TRUE;
4054 case 2: /* block cursor */
4055 term->big_cursor = TRUE;
4056 term->cursor_on = TRUE;
4060 case ANSI('C', '='):
4062 * set cursor start on scanline esc_args[0] and
4063 * end on scanline esc_args[1].If you set
4064 * the bottom scan line to a value less than
4065 * the top scan line, the cursor will disappear.
4067 compatibility(SCOANSI);
4068 if (term->esc_nargs >= 2) {
4069 if (term->esc_args[0] > term->esc_args[1])
4070 term->cursor_on = FALSE;
4072 term->cursor_on = TRUE;
4075 case ANSI('D', '='):
4076 compatibility(SCOANSI);
4077 term->blink_is_real = FALSE;
4078 term_schedule_tblink(term);
4079 if (term->esc_args[0]>=1)
4080 term->curr_attr |= ATTR_BLINK;
4082 term->curr_attr &= ~ATTR_BLINK;
4084 case ANSI('E', '='):
4085 compatibility(SCOANSI);
4086 term->blink_is_real = (term->esc_args[0] >= 1);
4087 term_schedule_tblink(term);
4089 case ANSI('F', '='): /* set normal foreground */
4090 compatibility(SCOANSI);
4091 if (term->esc_args[0] >= 0 && term->esc_args[0] < 16) {
4093 (sco2ansicolour[term->esc_args[0] & 0x7] |
4094 (term->esc_args[0] & 0x8)) <<
4096 term->curr_attr &= ~ATTR_FGMASK;
4097 term->curr_attr |= colour;
4098 term->default_attr &= ~ATTR_FGMASK;
4099 term->default_attr |= colour;
4100 set_erase_char(term);
4103 case ANSI('G', '='): /* set normal background */
4104 compatibility(SCOANSI);
4105 if (term->esc_args[0] >= 0 && term->esc_args[0] < 16) {
4107 (sco2ansicolour[term->esc_args[0] & 0x7] |
4108 (term->esc_args[0] & 0x8)) <<
4110 term->curr_attr &= ~ATTR_BGMASK;
4111 term->curr_attr |= colour;
4112 term->default_attr &= ~ATTR_BGMASK;
4113 term->default_attr |= colour;
4114 set_erase_char(term);
4117 case ANSI('L', '='):
4118 compatibility(SCOANSI);
4119 term->use_bce = (term->esc_args[0] <= 0);
4120 set_erase_char(term);
4122 case ANSI('p', '"'): /* DECSCL: set compat level */
4124 * Allow the host to make this emulator a
4125 * 'perfect' VT102. This first appeared in
4126 * the VT220, but we do need to get back to
4127 * PuTTY mode so I won't check it.
4129 * The arg in 40..42,50 are a PuTTY extension.
4130 * The 2nd arg, 8bit vs 7bit is not checked.
4132 * Setting VT102 mode should also change
4133 * the Fkeys to generate PF* codes as a
4134 * real VT102 has no Fkeys. The VT220 does
4135 * this, F11..F13 become ESC,BS,LF other
4136 * Fkeys send nothing.
4138 * Note ESC c will NOT change this!
4141 switch (term->esc_args[0]) {
4143 term->compatibility_level &= ~TM_VTXXX;
4144 term->compatibility_level |= TM_VT102;
4147 term->compatibility_level &= ~TM_VTXXX;
4148 term->compatibility_level |= TM_VT220;
4152 if (term->esc_args[0] > 60 &&
4153 term->esc_args[0] < 70)
4154 term->compatibility_level |= TM_VTXXX;
4158 term->compatibility_level &= TM_VTXXX;
4161 term->compatibility_level = TM_PUTTY;
4164 term->compatibility_level = TM_SCOANSI;
4168 term->compatibility_level = TM_PUTTY;
4174 /* Change the response to CSI c */
4175 if (term->esc_args[0] == 50) {
4178 strcpy(term->id_string, "\033[?");
4179 for (i = 1; i < term->esc_nargs; i++) {
4181 strcat(term->id_string, ";");
4182 sprintf(lbuf, "%d", term->esc_args[i]);
4183 strcat(term->id_string, lbuf);
4185 strcat(term->id_string, "c");
4188 /* Is this a good idea ?
4189 * Well we should do a soft reset at this point ...
4191 if (!has_compat(VT420) && has_compat(VT100)) {
4192 if (!term->no_remote_resize) {
4193 if (term->reset_132)
4194 request_resize(132, 24);
4196 request_resize(80, 24);
4204 term->osc_w = FALSE;
4206 case 'P': /* Linux palette sequence */
4207 term->termstate = SEEN_OSC_P;
4208 term->osc_strlen = 0;
4210 case 'R': /* Linux palette reset */
4211 palette_reset(term->frontend);
4212 term_invalidate(term);
4213 term->termstate = TOPLEVEL;
4215 case 'W': /* word-set */
4216 term->termstate = SEEN_OSC_W;
4229 term->esc_args[0] = 10 * term->esc_args[0] + c - '0';
4233 * Grotty hack to support xterm and DECterm title
4234 * sequences concurrently.
4236 if (term->esc_args[0] == 2) {
4237 term->esc_args[0] = 1;
4240 /* else fall through */
4242 term->termstate = OSC_STRING;
4243 term->osc_strlen = 0;
4248 * This OSC stuff is EVIL. It takes just one character to get into
4249 * sysline mode and it's not initially obvious how to get out.
4250 * So I've added CR and LF as string aborts.
4251 * This shouldn't effect compatibility as I believe embedded
4252 * control characters are supposed to be interpreted (maybe?)
4253 * and they don't display anything useful anyway.
4257 if (c == '\012' || c == '\015') {
4258 term->termstate = TOPLEVEL;
4259 } else if (c == 0234 || c == '\007') {
4261 * These characters terminate the string; ST and BEL
4262 * terminate the sequence and trigger instant
4263 * processing of it, whereas ESC goes back to SEEN_ESC
4264 * mode unless it is followed by \, in which case it is
4265 * synonymous with ST in the first place.
4268 term->termstate = TOPLEVEL;
4269 } else if (c == '\033')
4270 term->termstate = OSC_MAYBE_ST;
4271 else if (term->osc_strlen < OSC_STR_MAX)
4272 term->osc_string[term->osc_strlen++] = (char)c;
4276 int max = (term->osc_strlen == 0 ? 21 : 15);
4278 if ((int)c >= '0' && (int)c <= '9')
4280 else if ((int)c >= 'A' && (int)c <= 'A' + max - 10)
4282 else if ((int)c >= 'a' && (int)c <= 'a' + max - 10)
4285 term->termstate = TOPLEVEL;
4288 term->osc_string[term->osc_strlen++] = val;
4289 if (term->osc_strlen >= 7) {
4290 palette_set(term->frontend, term->osc_string[0],
4291 term->osc_string[1] * 16 + term->osc_string[2],
4292 term->osc_string[3] * 16 + term->osc_string[4],
4293 term->osc_string[5] * 16 + term->osc_string[6]);
4294 term_invalidate(term);
4295 term->termstate = TOPLEVEL;
4311 term->esc_args[0] = 10 * term->esc_args[0] + c - '0';
4314 term->termstate = OSC_STRING;
4315 term->osc_strlen = 0;
4319 term->termstate = TOPLEVEL;
4320 seen_disp_event(term);
4323 move(term, term->curs.x, term->curs.y - 1, 1);
4326 move(term, term->curs.x, term->curs.y + 1, 1);
4329 move(term, term->curs.x + 1, term->curs.y, 1);
4332 move(term, term->curs.x - 1, term->curs.y, 1);
4335 * From the VT100 Manual
4336 * NOTE: The special graphics characters in the VT100
4337 * are different from those in the VT52
4339 * From VT102 manual:
4340 * 137 _ Blank - Same
4341 * 140 ` Reserved - Humm.
4342 * 141 a Solid rectangle - Similar
4343 * 142 b 1/ - Top half of fraction for the
4344 * 143 c 3/ - subscript numbers below.
4347 * 146 f Degrees - Same
4348 * 147 g Plus or minus - Same
4350 * 151 i Ellipsis (dots)
4353 * 154 l Bar at scan 0
4354 * 155 m Bar at scan 1
4355 * 156 n Bar at scan 2
4356 * 157 o Bar at scan 3 - Similar
4357 * 160 p Bar at scan 4 - Similar
4358 * 161 q Bar at scan 5 - Similar
4359 * 162 r Bar at scan 6 - Same
4360 * 163 s Bar at scan 7 - Similar
4375 term->cset_attr[term->cset = 0] = CSET_LINEDRW;
4378 term->cset_attr[term->cset = 0] = CSET_ASCII;
4381 move(term, 0, 0, 0);
4384 if (term->curs.y == 0)
4385 scroll(term, 0, term->rows - 1, -1, TRUE);
4386 else if (term->curs.y > 0)
4388 term->wrapnext = FALSE;
4391 erase_lots(term, FALSE, FALSE, TRUE);
4395 erase_lots(term, TRUE, FALSE, TRUE);
4399 /* XXX Print cursor line */
4402 /* XXX Start controller mode */
4405 /* XXX Stop controller mode */
4409 term->termstate = VT52_Y1;
4413 ldisc_send(term->ldisc, "\033/Z", 3, 0);
4416 term->app_keypad_keys = TRUE;
4419 term->app_keypad_keys = FALSE;
4422 /* XXX This should switch to VT100 mode not current or default
4423 * VT mode. But this will only have effect in a VT220+
4426 term->vt52_mode = FALSE;
4427 term->blink_is_real = term->blinktext;
4428 term_schedule_tblink(term);
4432 /* XXX Enter auto print mode */
4435 /* XXX Exit auto print mode */
4438 /* XXX Print screen */
4444 /* compatibility(ATARI) */
4445 move(term, 0, 0, 0);
4446 erase_lots(term, FALSE, FALSE, TRUE);
4450 /* compatibility(ATARI) */
4451 if (term->curs.y <= term->marg_b)
4452 scroll(term, term->curs.y, term->marg_b, -1, FALSE);
4455 /* compatibility(ATARI) */
4456 if (term->curs.y <= term->marg_b)
4457 scroll(term, term->curs.y, term->marg_b, 1, TRUE);
4460 /* compatibility(ATARI) */
4461 term->termstate = VT52_FG;
4464 /* compatibility(ATARI) */
4465 term->termstate = VT52_BG;
4468 /* compatibility(ATARI) */
4469 erase_lots(term, FALSE, TRUE, FALSE);
4473 /* compatibility(ATARI) */
4474 term->cursor_on = TRUE;
4477 /* compatibility(ATARI) */
4478 term->cursor_on = FALSE;
4480 /* case 'j': Save cursor position - broken on ST */
4481 /* case 'k': Restore cursor position */
4483 /* compatibility(ATARI) */
4484 erase_lots(term, TRUE, TRUE, TRUE);
4486 term->wrapnext = FALSE;
4489 /* compatibility(ATARI) */
4490 erase_lots(term, TRUE, TRUE, FALSE);
4493 /* compatibility(ATARI) */
4494 term->curr_attr |= ATTR_REVERSE;
4497 /* compatibility(ATARI) */
4498 term->curr_attr &= ~ATTR_REVERSE;
4500 case 'v': /* wrap Autowrap on - Wyse style */
4501 /* compatibility(ATARI) */
4504 case 'w': /* Autowrap off */
4505 /* compatibility(ATARI) */
4510 /* compatibility(OTHER) */
4511 term->vt52_bold = FALSE;
4512 term->curr_attr = ATTR_DEFAULT;
4513 set_erase_char(term);
4516 /* compatibility(VI50) */
4517 term->curr_attr |= ATTR_UNDER;
4520 /* compatibility(VI50) */
4521 term->curr_attr &= ~ATTR_UNDER;
4524 /* compatibility(VI50) */
4525 term->vt52_bold = TRUE;
4526 term->curr_attr |= ATTR_BOLD;
4529 /* compatibility(VI50) */
4530 term->vt52_bold = FALSE;
4531 term->curr_attr &= ~ATTR_BOLD;
4537 term->termstate = VT52_Y2;
4538 move(term, term->curs.x, c - ' ', 0);
4541 term->termstate = TOPLEVEL;
4542 move(term, c - ' ', term->curs.y, 0);
4547 term->termstate = TOPLEVEL;
4548 term->curr_attr &= ~ATTR_FGMASK;
4549 term->curr_attr &= ~ATTR_BOLD;
4550 term->curr_attr |= (c & 0xF) << ATTR_FGSHIFT;
4551 set_erase_char(term);
4554 term->termstate = TOPLEVEL;
4555 term->curr_attr &= ~ATTR_BGMASK;
4556 term->curr_attr &= ~ATTR_BLINK;
4557 term->curr_attr |= (c & 0xF) << ATTR_BGSHIFT;
4558 set_erase_char(term);
4561 default: break; /* placate gcc warning about enum use */
4563 if (term->selstate != NO_SELECTION) {
4564 pos cursplus = term->curs;
4566 check_selection(term, term->curs, cursplus);
4570 term_print_flush(term);
4572 logflush(term->logctx);
4576 * To prevent having to run the reasonably tricky bidi algorithm
4577 * too many times, we maintain a cache of the last lineful of data
4578 * fed to the algorithm on each line of the display.
4580 static int term_bidi_cache_hit(Terminal *term, int line,
4581 termchar *lbefore, int width)
4585 if (!term->pre_bidi_cache)
4586 return FALSE; /* cache doesn't even exist yet! */
4588 if (line >= term->bidi_cache_size)
4589 return FALSE; /* cache doesn't have this many lines */
4591 if (!term->pre_bidi_cache[line].chars)
4592 return FALSE; /* cache doesn't contain _this_ line */
4594 if (term->pre_bidi_cache[line].width != width)
4595 return FALSE; /* line is wrong width */
4597 for (i = 0; i < width; i++)
4598 if (!termchars_equal(term->pre_bidi_cache[line].chars+i, lbefore+i))
4599 return FALSE; /* line doesn't match cache */
4601 return TRUE; /* it didn't match. */
4604 static void term_bidi_cache_store(Terminal *term, int line, termchar *lbefore,
4605 termchar *lafter, bidi_char *wcTo,
4606 int width, int size)
4610 if (!term->pre_bidi_cache || term->bidi_cache_size <= line) {
4611 int j = term->bidi_cache_size;
4612 term->bidi_cache_size = line+1;
4613 term->pre_bidi_cache = sresize(term->pre_bidi_cache,
4614 term->bidi_cache_size,
4615 struct bidi_cache_entry);
4616 term->post_bidi_cache = sresize(term->post_bidi_cache,
4617 term->bidi_cache_size,
4618 struct bidi_cache_entry);
4619 while (j < term->bidi_cache_size) {
4620 term->pre_bidi_cache[j].chars =
4621 term->post_bidi_cache[j].chars = NULL;
4622 term->pre_bidi_cache[j].width =
4623 term->post_bidi_cache[j].width = -1;
4624 term->pre_bidi_cache[j].forward =
4625 term->post_bidi_cache[j].forward = NULL;
4626 term->pre_bidi_cache[j].backward =
4627 term->post_bidi_cache[j].backward = NULL;
4632 sfree(term->pre_bidi_cache[line].chars);
4633 sfree(term->post_bidi_cache[line].chars);
4634 sfree(term->post_bidi_cache[line].forward);
4635 sfree(term->post_bidi_cache[line].backward);
4637 term->pre_bidi_cache[line].width = width;
4638 term->pre_bidi_cache[line].chars = snewn(size, termchar);
4639 term->post_bidi_cache[line].width = width;
4640 term->post_bidi_cache[line].chars = snewn(size, termchar);
4641 term->post_bidi_cache[line].forward = snewn(width, int);
4642 term->post_bidi_cache[line].backward = snewn(width, int);
4644 memcpy(term->pre_bidi_cache[line].chars, lbefore, size * TSIZE);
4645 memcpy(term->post_bidi_cache[line].chars, lafter, size * TSIZE);
4646 memset(term->post_bidi_cache[line].forward, 0, width * sizeof(int));
4647 memset(term->post_bidi_cache[line].backward, 0, width * sizeof(int));
4649 for (i = 0; i < width; i++) {
4650 int p = wcTo[i].index;
4652 assert(0 <= p && p < width);
4654 term->post_bidi_cache[line].backward[i] = p;
4655 term->post_bidi_cache[line].forward[p] = i;
4660 * Prepare the bidi information for a screen line. Returns the
4661 * transformed list of termchars, or NULL if no transformation at
4662 * all took place (because bidi is disabled). If return was
4663 * non-NULL, auxiliary information such as the forward and reverse
4664 * mappings of permutation position are available in
4665 * term->post_bidi_cache[scr_y].*.
4667 static termchar *term_bidi_line(Terminal *term, struct termline *ldata,
4673 /* Do Arabic shaping and bidi. */
4674 if(!term->bidi || !term->arabicshaping) {
4676 if (!term_bidi_cache_hit(term, scr_y, ldata->chars, term->cols)) {
4678 if (term->wcFromTo_size < term->cols) {
4679 term->wcFromTo_size = term->cols;
4680 term->wcFrom = sresize(term->wcFrom, term->wcFromTo_size,
4682 term->wcTo = sresize(term->wcTo, term->wcFromTo_size,
4686 for(it=0; it<term->cols ; it++)
4688 unsigned long uc = (ldata->chars[it].chr);
4690 switch (uc & CSET_MASK) {
4692 if (!term->rawcnp) {
4693 uc = term->ucsdata->unitab_xterm[uc & 0xFF];
4697 uc = term->ucsdata->unitab_line[uc & 0xFF];
4700 uc = term->ucsdata->unitab_scoacs[uc&0xFF];
4703 switch (uc & CSET_MASK) {
4705 uc = term->ucsdata->unitab_font[uc & 0xFF];
4708 uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
4712 term->wcFrom[it].origwc = term->wcFrom[it].wc =
4714 term->wcFrom[it].index = it;
4718 do_bidi(term->wcFrom, term->cols);
4720 /* this is saved iff done from inside the shaping */
4721 if(!term->bidi && term->arabicshaping)
4722 for(it=0; it<term->cols; it++)
4723 term->wcTo[it] = term->wcFrom[it];
4725 if(!term->arabicshaping)
4726 do_shape(term->wcFrom, term->wcTo, term->cols);
4728 if (term->ltemp_size < ldata->size) {
4729 term->ltemp_size = ldata->size;
4730 term->ltemp = sresize(term->ltemp, term->ltemp_size,
4734 memcpy(term->ltemp, ldata->chars, ldata->size * TSIZE);
4736 for(it=0; it<term->cols ; it++)
4738 term->ltemp[it] = ldata->chars[term->wcTo[it].index];
4739 if (term->ltemp[it].cc_next)
4740 term->ltemp[it].cc_next -=
4741 it - term->wcTo[it].index;
4743 if (term->wcTo[it].origwc != term->wcTo[it].wc)
4744 term->ltemp[it].chr = term->wcTo[it].wc;
4746 term_bidi_cache_store(term, scr_y, ldata->chars,
4747 term->ltemp, term->wcTo,
4748 term->cols, ldata->size);
4750 lchars = term->ltemp;
4752 lchars = term->post_bidi_cache[scr_y].chars;
4762 * Given a context, update the window. Out of paranoia, we don't
4763 * allow WM_PAINT responses to do scrolling optimisations.
4765 static void do_paint(Terminal *term, Context ctx, int may_optimise)
4767 int i, j, our_curs_y, our_curs_x;
4772 #ifdef OPTIMISE_SCROLL
4773 struct scrollregion *sr;
4774 #endif /* OPTIMISE_SCROLL */
4778 ch = snewn(chlen, wchar_t);
4780 newline = snewn(term->cols, termchar);
4782 rv = (!term->rvideo ^ !term->in_vbell ? ATTR_REVERSE : 0);
4785 * screen array, disptop, scrtop,
4787 * blinkpc, blink_is_real, tblinker,
4788 * curs.y, curs.x, cblinker, blink_cur, cursor_on, has_focus, wrapnext
4791 /* Has the cursor position or type changed ? */
4792 if (term->cursor_on) {
4793 if (term->has_focus) {
4794 if (term->cblinker || !term->blink_cur)
4795 cursor = TATTR_ACTCURS;
4799 cursor = TATTR_PASCURS;
4801 cursor |= TATTR_RIGHTCURS;
4804 our_curs_y = term->curs.y - term->disptop;
4807 * Adjust the cursor position:
4809 * - in the case where it's resting on the right-hand half
4810 * of a CJK wide character. xterm's behaviour here,
4811 * which seems adequate to me, is to display the cursor
4812 * covering the _whole_ character, exactly as if it were
4813 * one space to the left.
4815 termline *ldata = lineptr(term->curs.y);
4818 our_curs_x = term->curs.x;
4820 if ( (lchars = term_bidi_line(term, ldata, our_curs_y)) != NULL) {
4821 our_curs_x = term->post_bidi_cache[our_curs_y].forward[our_curs_x];
4823 lchars = ldata->chars;
4825 if (our_curs_x > 0 &&
4826 lchars[our_curs_x].chr == UCSWIDE)
4833 * If the cursor is not where it was last time we painted, and
4834 * its previous position is visible on screen, invalidate its
4835 * previous position.
4837 if (term->dispcursy >= 0 &&
4838 (term->curstype != cursor ||
4839 term->dispcursy != our_curs_y ||
4840 term->dispcursx != our_curs_x)) {
4841 termchar *dispcurs = term->disptext[term->dispcursy]->chars +
4844 if (term->dispcursx > 0 && dispcurs->chr == UCSWIDE)
4845 dispcurs[-1].attr |= ATTR_INVALID;
4846 if (term->dispcursx < term->cols-1 && dispcurs[1].chr == UCSWIDE)
4847 dispcurs[1].attr |= ATTR_INVALID;
4848 dispcurs->attr |= ATTR_INVALID;
4852 term->dispcursx = term->dispcursy = -1;
4854 #ifdef OPTIMISE_SCROLL
4856 sr = term->scrollhead;
4858 struct scrollregion *next = sr->next;
4859 do_scroll(ctx, sr->topline, sr->botline, sr->lines);
4863 term->scrollhead = term->scrolltail = NULL;
4864 #endif /* OPTIMISE_SCROLL */
4866 /* The normal screen data */
4867 for (i = 0; i < term->rows; i++) {
4870 int dirty_line, dirty_run, selected;
4871 unsigned long attr = 0, cset = 0;
4874 int last_run_dirty = 0;
4875 int laststart, dirtyrect;
4878 scrpos.y = i + term->disptop;
4879 ldata = lineptr(scrpos.y);
4881 /* Do Arabic shaping and bidi. */
4882 lchars = term_bidi_line(term, ldata, i);
4884 backward = term->post_bidi_cache[i].backward;
4886 lchars = ldata->chars;
4891 * First loop: work along the line deciding what we want
4892 * each character cell to look like.
4894 for (j = 0; j < term->cols; j++) {
4895 unsigned long tattr, tchar;
4896 termchar *d = lchars + j;
4897 scrpos.x = backward ? backward[j] : j;
4902 if (!term->ansi_colour)
4903 tattr = (tattr & ~(ATTR_FGMASK | ATTR_BGMASK)) |
4904 ATTR_DEFFG | ATTR_DEFBG;
4906 if (!term->xterm_256_colour) {
4908 colour = (tattr & ATTR_FGMASK) >> ATTR_FGSHIFT;
4909 if (colour >= 16 && colour < 256)
4910 tattr = (tattr &~ ATTR_FGMASK) | ATTR_DEFFG;
4911 colour = (tattr & ATTR_BGMASK) >> ATTR_BGSHIFT;
4912 if (colour >= 16 && colour < 256)
4913 tattr = (tattr &~ ATTR_BGMASK) | ATTR_DEFBG;
4916 switch (tchar & CSET_MASK) {
4918 tchar = term->ucsdata->unitab_line[tchar & 0xFF];
4921 tchar = term->ucsdata->unitab_xterm[tchar & 0xFF];
4924 tchar = term->ucsdata->unitab_scoacs[tchar&0xFF];
4927 if (j < term->cols-1 && d[1].chr == UCSWIDE)
4930 /* Video reversing things */
4931 if (term->selstate == DRAGGING || term->selstate == SELECTED) {
4932 if (term->seltype == LEXICOGRAPHIC)
4933 selected = (posle(term->selstart, scrpos) &&
4934 poslt(scrpos, term->selend));
4936 selected = (posPle(term->selstart, scrpos) &&
4937 posPlt(scrpos, term->selend));
4941 ^ (selected ? ATTR_REVERSE : 0));
4943 /* 'Real' blinking ? */
4944 if (term->blink_is_real && (tattr & ATTR_BLINK)) {
4945 if (term->has_focus && term->tblinker) {
4946 tchar = term->ucsdata->unitab_line[(unsigned char)' '];
4948 tattr &= ~ATTR_BLINK;
4952 * Check the font we'll _probably_ be using to see if
4953 * the character is wide when we don't want it to be.
4955 if (tchar != term->disptext[i]->chars[j].chr ||
4956 tattr != (term->disptext[i]->chars[j].attr &~
4957 (ATTR_NARROW | DATTR_MASK))) {
4958 if ((tattr & ATTR_WIDE) == 0 && char_width(ctx, tchar) == 2)
4959 tattr |= ATTR_NARROW;
4960 } else if (term->disptext[i]->chars[j].attr & ATTR_NARROW)
4961 tattr |= ATTR_NARROW;
4963 if (i == our_curs_y && j == our_curs_x) {
4965 term->curstype = cursor;
4966 term->dispcursx = j;
4967 term->dispcursy = i;
4971 newline[j].attr = tattr;
4972 newline[j].chr = tchar;
4973 /* Combining characters are still read from lchars */
4974 newline[j].cc_next = 0;
4978 * Now loop over the line again, noting where things have
4981 * During this loop, we keep track of where we last saw
4982 * DATTR_STARTRUN. Any mismatch automatically invalidates
4983 * _all_ of the containing run that was last printed: that
4984 * is, any rectangle that was drawn in one go in the
4985 * previous update should be either left completely alone
4986 * or overwritten in its entirety. This, along with the
4987 * expectation that front ends clip all text runs to their
4988 * bounding rectangle, should solve any possible problems
4989 * with fonts that overflow their character cells.
4993 for (j = 0; j < term->cols; j++) {
4994 if (term->disptext[i]->chars[j].attr & DATTR_STARTRUN) {
4999 if (term->disptext[i]->chars[j].chr != newline[j].chr ||
5000 (term->disptext[i]->chars[j].attr &~ DATTR_MASK)
5001 != newline[j].attr) {
5005 for (k = laststart; k < j; k++)
5006 term->disptext[i]->chars[k].attr |= ATTR_INVALID;
5013 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5017 * Finally, loop once more and actually do the drawing.
5019 dirty_run = dirty_line = (ldata->lattr !=
5020 term->disptext[i]->lattr);
5021 term->disptext[i]->lattr = ldata->lattr;
5023 for (j = 0; j < term->cols; j++) {
5024 unsigned long tattr, tchar;
5025 int break_run, do_copy;
5026 termchar *d = lchars + j;
5028 tattr = newline[j].attr;
5029 tchar = newline[j].chr;
5031 if ((term->disptext[i]->chars[j].attr ^ tattr) & ATTR_WIDE)
5034 break_run = ((tattr ^ attr) & term->attr_mask) != 0;
5036 #ifdef USES_VTLINE_HACK
5037 /* Special hack for VT100 Linedraw glyphs */
5038 if ((tchar >= 0x23BA && tchar <= 0x23BD) ||
5039 (j > 0 && (newline[j-1].chr >= 0x23BA &&
5040 newline[j-1].chr <= 0x23BD)))
5045 * Separate out sequences of characters that have the
5046 * same CSET, if that CSET is a magic one.
5048 if (CSET_OF(tchar) != cset)
5052 * Break on both sides of any combined-character cell.
5054 if (d->cc_next != 0 ||
5055 (j > 0 && d[-1].cc_next != 0))
5058 if (!term->ucsdata->dbcs_screenfont && !dirty_line) {
5059 if (term->disptext[i]->chars[j].chr == tchar &&
5060 (term->disptext[i]->chars[j].attr &~ DATTR_MASK) == tattr)
5062 else if (!dirty_run && ccount == 1)
5067 if ((dirty_run || last_run_dirty) && ccount > 0) {
5068 do_text(ctx, start, i, ch, ccount, attr,
5070 if (attr & (TATTR_ACTCURS | TATTR_PASCURS))
5071 do_cursor(ctx, start, i, ch, ccount, attr,
5077 cset = CSET_OF(tchar);
5078 if (term->ucsdata->dbcs_screenfont)
5079 last_run_dirty = dirty_run;
5080 dirty_run = dirty_line;
5084 if (!termchars_equal_override(&term->disptext[i]->chars[j],
5090 if (ccount+2 > chlen) {
5091 chlen = ccount + 256;
5092 ch = sresize(ch, chlen, wchar_t);
5095 #ifdef PLATFORM_IS_UTF16
5096 if (tchar > 0x10000 && tchar < 0x110000) {
5097 ch[ccount++] = (wchar_t) HIGH_SURROGATE_OF(tchar);
5098 ch[ccount++] = (wchar_t) LOW_SURROGATE_OF(tchar);
5100 #endif /* PLATFORM_IS_UTF16 */
5101 ch[ccount++] = (wchar_t) tchar;
5106 while (dd->cc_next) {
5107 unsigned long schar;
5112 switch (schar & CSET_MASK) {
5114 schar = term->ucsdata->unitab_line[schar & 0xFF];
5117 schar = term->ucsdata->unitab_xterm[schar & 0xFF];
5120 schar = term->ucsdata->unitab_scoacs[schar&0xFF];
5124 if (ccount+2 > chlen) {
5125 chlen = ccount + 256;
5126 ch = sresize(ch, chlen, wchar_t);
5129 #ifdef PLATFORM_IS_UTF16
5130 if (schar > 0x10000 && schar < 0x110000) {
5131 ch[ccount++] = (wchar_t) HIGH_SURROGATE_OF(schar);
5132 ch[ccount++] = (wchar_t) LOW_SURROGATE_OF(schar);
5134 #endif /* PLATFORM_IS_UTF16 */
5135 ch[ccount++] = (wchar_t) schar;
5138 attr |= TATTR_COMBINING;
5142 copy_termchar(term->disptext[i], j, d);
5143 term->disptext[i]->chars[j].chr = tchar;
5144 term->disptext[i]->chars[j].attr = tattr;
5146 term->disptext[i]->chars[j].attr |= DATTR_STARTRUN;
5149 /* If it's a wide char step along to the next one. */
5150 if (tattr & ATTR_WIDE) {
5151 if (++j < term->cols) {
5154 * By construction above, the cursor should not
5155 * be on the right-hand half of this character.
5158 assert(!(i == our_curs_y && j == our_curs_x));
5159 if (!termchars_equal(&term->disptext[i]->chars[j], d))
5161 copy_termchar(term->disptext[i], j, d);
5165 if (dirty_run && ccount > 0) {
5166 do_text(ctx, start, i, ch, ccount, attr,
5168 if (attr & (TATTR_ACTCURS | TATTR_PASCURS))
5169 do_cursor(ctx, start, i, ch, ccount, attr,
5181 * Invalidate the whole screen so it will be repainted in full.
5183 void term_invalidate(Terminal *term)
5187 for (i = 0; i < term->rows; i++)
5188 for (j = 0; j < term->cols; j++)
5189 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5191 term_schedule_update(term);
5195 * Paint the window in response to a WM_PAINT message.
5197 void term_paint(Terminal *term, Context ctx,
5198 int left, int top, int right, int bottom, int immediately)
5201 if (left < 0) left = 0;
5202 if (top < 0) top = 0;
5203 if (right >= term->cols) right = term->cols-1;
5204 if (bottom >= term->rows) bottom = term->rows-1;
5206 for (i = top; i <= bottom && i < term->rows; i++) {
5207 if ((term->disptext[i]->lattr & LATTR_MODE) == LATTR_NORM)
5208 for (j = left; j <= right && j < term->cols; j++)
5209 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5211 for (j = left / 2; j <= right / 2 + 1 && j < term->cols; j++)
5212 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5216 do_paint (term, ctx, FALSE);
5218 term_schedule_update(term);
5223 * Attempt to scroll the scrollback. The second parameter gives the
5224 * position we want to scroll to; the first is +1 to denote that
5225 * this position is relative to the beginning of the scrollback, -1
5226 * to denote it is relative to the end, and 0 to denote that it is
5227 * relative to the current position.
5229 void term_scroll(Terminal *term, int rel, int where)
5231 int sbtop = -sblines(term);
5232 #ifdef OPTIMISE_SCROLL
5233 int olddisptop = term->disptop;
5235 #endif /* OPTIMISE_SCROLL */
5237 term->disptop = (rel < 0 ? 0 : rel > 0 ? sbtop : term->disptop) + where;
5238 if (term->disptop < sbtop)
5239 term->disptop = sbtop;
5240 if (term->disptop > 0)
5243 #ifdef OPTIMISE_SCROLL
5244 shift = (term->disptop - olddisptop);
5245 if (shift < term->rows && shift > -term->rows)
5246 scroll_display(term, 0, term->rows - 1, shift);
5247 #endif /* OPTIMISE_SCROLL */
5252 * Scroll the scrollback to centre it on the beginning or end of the
5253 * current selection, if any.
5255 void term_scroll_to_selection(Terminal *term, int which_end)
5259 int sbtop = -sblines(term);
5261 if (term->selstate != SELECTED)
5264 target = term->selend;
5266 target = term->selstart;
5268 y = target.y - term->rows/2;
5273 term_scroll(term, -1, y);
5277 * Helper routine for clipme(): growing buffer.
5280 int buflen; /* amount of allocated space in textbuf/attrbuf */
5281 int bufpos; /* amount of actual data */
5282 wchar_t *textbuf; /* buffer for copied text */
5283 wchar_t *textptr; /* = textbuf + bufpos (current insertion point) */
5284 int *attrbuf; /* buffer for copied attributes */
5285 int *attrptr; /* = attrbuf + bufpos */
5288 static void clip_addchar(clip_workbuf *b, wchar_t chr, int attr)
5290 if (b->bufpos >= b->buflen) {
5292 b->textbuf = sresize(b->textbuf, b->buflen, wchar_t);
5293 b->textptr = b->textbuf + b->bufpos;
5294 b->attrbuf = sresize(b->attrbuf, b->buflen, int);
5295 b->attrptr = b->attrbuf + b->bufpos;
5297 *b->textptr++ = chr;
5298 *b->attrptr++ = attr;
5302 static void clipme(Terminal *term, pos top, pos bottom, int rect, int desel)
5310 buf.textptr = buf.textbuf = snewn(buf.buflen, wchar_t);
5311 buf.attrptr = buf.attrbuf = snewn(buf.buflen, int);
5313 old_top_x = top.x; /* needed for rect==1 */
5315 while (poslt(top, bottom)) {
5317 termline *ldata = lineptr(top.y);
5321 * nlpos will point at the maximum position on this line we
5322 * should copy up to. So we start it at the end of the
5326 nlpos.x = term->cols;
5329 * ... move it backwards if there's unused space at the end
5330 * of the line (and also set `nl' if this is the case,
5331 * because in normal selection mode this means we need a
5332 * newline at the end)...
5334 if (!(ldata->lattr & LATTR_WRAPPED)) {
5336 IS_SPACE_CHR(ldata->chars[nlpos.x - 1].chr) &&
5337 !ldata->chars[nlpos.x - 1].cc_next &&
5340 if (poslt(nlpos, bottom))
5342 } else if (ldata->lattr & LATTR_WRAPPED2) {
5343 /* Ignore the last char on the line in a WRAPPED2 line. */
5348 * ... and then clip it to the terminal x coordinate if
5349 * we're doing rectangular selection. (In this case we
5350 * still did the above, so that copying e.g. the right-hand
5351 * column from a table doesn't fill with spaces on the
5355 if (nlpos.x > bottom.x)
5357 nl = (top.y < bottom.y);
5360 while (poslt(top, bottom) && poslt(top, nlpos)) {
5363 sprintf(cbuf, "<U+%04x>", (ldata[top.x] & 0xFFFF));
5365 wchar_t cbuf[16], *p;
5369 if (ldata->chars[x].chr == UCSWIDE) {
5375 int uc = ldata->chars[x].chr;
5376 attr = ldata->chars[x].attr;
5378 switch (uc & CSET_MASK) {
5380 if (!term->rawcnp) {
5381 uc = term->ucsdata->unitab_xterm[uc & 0xFF];
5385 uc = term->ucsdata->unitab_line[uc & 0xFF];
5388 uc = term->ucsdata->unitab_scoacs[uc&0xFF];
5391 switch (uc & CSET_MASK) {
5393 uc = term->ucsdata->unitab_font[uc & 0xFF];
5396 uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
5400 c = (uc & ~CSET_MASK);
5401 #ifdef PLATFORM_IS_UTF16
5402 if (uc > 0x10000 && uc < 0x110000) {
5403 cbuf[0] = 0xD800 | ((uc - 0x10000) >> 10);
5404 cbuf[1] = 0xDC00 | ((uc - 0x10000) & 0x3FF);
5413 if (DIRECT_FONT(uc)) {
5414 if (c >= ' ' && c != 0x7F) {
5418 if (is_dbcs_leadbyte(term->ucsdata->font_codepage, (BYTE) c)) {
5420 buf[1] = (char) (0xFF & ldata->chars[top.x + 1].chr);
5421 rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 2, wbuf, 4);
5425 rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 1, wbuf, 4);
5429 memcpy(cbuf, wbuf, rv * sizeof(wchar_t));
5436 for (p = cbuf; *p; p++)
5437 clip_addchar(&buf, *p, attr);
5439 if (ldata->chars[x].cc_next)
5440 x += ldata->chars[x].cc_next;
5448 for (i = 0; i < sel_nl_sz; i++)
5449 clip_addchar(&buf, sel_nl[i], 0);
5452 top.x = rect ? old_top_x : 0;
5456 #if SELECTION_NUL_TERMINATED
5457 clip_addchar(&buf, 0, 0);
5459 /* Finally, transfer all that to the clipboard. */
5460 write_clip(term->frontend, buf.textbuf, buf.attrbuf, buf.bufpos, desel);
5465 void term_copyall(Terminal *term)
5469 tree234 *screen = term->screen;
5470 top.y = -sblines(term);
5472 bottom.y = find_last_nonempty_line(term, screen);
5473 bottom.x = term->cols;
5474 clipme(term, top, bottom, 0, TRUE);
5478 * The wordness array is mainly for deciding the disposition of the
5479 * US-ASCII characters.
5481 static int wordtype(Terminal *term, int uc)
5484 int start, end, ctype;
5486 static const struct ucsword ucs_words[] = {
5492 0x037e, 0x037e, 1}, /* Greek question mark */
5494 0x0387, 0x0387, 1}, /* Greek ano teleia */
5496 0x055a, 0x055f, 1}, /* Armenian punctuation */
5498 0x0589, 0x0589, 1}, /* Armenian full stop */
5500 0x0700, 0x070d, 1}, /* Syriac punctuation */
5502 0x104a, 0x104f, 1}, /* Myanmar punctuation */
5504 0x10fb, 0x10fb, 1}, /* Georgian punctuation */
5506 0x1361, 0x1368, 1}, /* Ethiopic punctuation */
5508 0x166d, 0x166e, 1}, /* Canadian Syl. punctuation */
5510 0x17d4, 0x17dc, 1}, /* Khmer punctuation */
5512 0x1800, 0x180a, 1}, /* Mongolian punctuation */
5514 0x2000, 0x200a, 0}, /* Various spaces */
5516 0x2070, 0x207f, 2}, /* superscript */
5518 0x2080, 0x208f, 2}, /* subscript */
5520 0x200b, 0x27ff, 1}, /* punctuation and symbols */
5522 0x3000, 0x3000, 0}, /* ideographic space */
5524 0x3001, 0x3020, 1}, /* ideographic punctuation */
5526 0x303f, 0x309f, 3}, /* Hiragana */
5528 0x30a0, 0x30ff, 3}, /* Katakana */
5530 0x3300, 0x9fff, 3}, /* CJK Ideographs */
5532 0xac00, 0xd7a3, 3}, /* Hangul Syllables */
5534 0xf900, 0xfaff, 3}, /* CJK Ideographs */
5536 0xfe30, 0xfe6b, 1}, /* punctuation forms */
5538 0xff00, 0xff0f, 1}, /* half/fullwidth ASCII */
5540 0xff1a, 0xff20, 1}, /* half/fullwidth ASCII */
5542 0xff3b, 0xff40, 1}, /* half/fullwidth ASCII */
5544 0xff5b, 0xff64, 1}, /* half/fullwidth ASCII */
5546 0xfff0, 0xffff, 0}, /* half/fullwidth ASCII */
5550 const struct ucsword *wptr;
5552 switch (uc & CSET_MASK) {
5554 uc = term->ucsdata->unitab_xterm[uc & 0xFF];
5557 uc = term->ucsdata->unitab_line[uc & 0xFF];
5560 uc = term->ucsdata->unitab_scoacs[uc&0xFF];
5563 switch (uc & CSET_MASK) {
5565 uc = term->ucsdata->unitab_font[uc & 0xFF];
5568 uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
5572 /* For DBCS fonts I can't do anything useful. Even this will sometimes
5573 * fail as there's such a thing as a double width space. :-(
5575 if (term->ucsdata->dbcs_screenfont &&
5576 term->ucsdata->font_codepage == term->ucsdata->line_codepage)
5580 return term->wordness[uc];
5582 for (wptr = ucs_words; wptr->start; wptr++) {
5583 if (uc >= wptr->start && uc <= wptr->end)
5591 * Spread the selection outwards according to the selection mode.
5593 static pos sel_spread_half(Terminal *term, pos p, int dir)
5597 int topy = -sblines(term);
5599 ldata = lineptr(p.y);
5601 switch (term->selmode) {
5604 * In this mode, every character is a separate unit, except
5605 * for runs of spaces at the end of a non-wrapping line.
5607 if (!(ldata->lattr & LATTR_WRAPPED)) {
5608 termchar *q = ldata->chars + term->cols;
5609 while (q > ldata->chars &&
5610 IS_SPACE_CHR(q[-1].chr) && !q[-1].cc_next)
5612 if (q == ldata->chars + term->cols)
5614 if (p.x >= q - ldata->chars)
5615 p.x = (dir == -1 ? q - ldata->chars : term->cols - 1);
5620 * In this mode, the units are maximal runs of characters
5621 * whose `wordness' has the same value.
5623 wvalue = wordtype(term, UCSGET(ldata->chars, p.x));
5626 int maxcols = (ldata->lattr & LATTR_WRAPPED2 ?
5627 term->cols-1 : term->cols);
5628 if (p.x < maxcols-1) {
5629 if (wordtype(term, UCSGET(ldata->chars, p.x+1)) == wvalue)
5634 if (p.y+1 < term->rows &&
5635 (ldata->lattr & LATTR_WRAPPED)) {
5637 ldata2 = lineptr(p.y+1);
5638 if (wordtype(term, UCSGET(ldata2->chars, 0))
5655 if (wordtype(term, UCSGET(ldata->chars, p.x-1)) == wvalue)
5664 ldata2 = lineptr(p.y-1);
5665 maxcols = (ldata2->lattr & LATTR_WRAPPED2 ?
5666 term->cols-1 : term->cols);
5667 if (ldata2->lattr & LATTR_WRAPPED) {
5668 if (wordtype(term, UCSGET(ldata2->chars, maxcols-1))
5686 * In this mode, every line is a unit.
5688 p.x = (dir == -1 ? 0 : term->cols - 1);
5696 static void sel_spread(Terminal *term)
5698 if (term->seltype == LEXICOGRAPHIC) {
5699 term->selstart = sel_spread_half(term, term->selstart, -1);
5700 decpos(term->selend);
5701 term->selend = sel_spread_half(term, term->selend, +1);
5702 incpos(term->selend);
5706 static void term_paste_callback(void *vterm)
5708 Terminal *term = (Terminal *)vterm;
5710 if (term->paste_len == 0)
5713 while (term->paste_pos < term->paste_len) {
5715 while (n + term->paste_pos < term->paste_len) {
5716 if (term->paste_buffer[term->paste_pos + n++] == '\015')
5720 luni_send(term->ldisc, term->paste_buffer + term->paste_pos, n, 0);
5721 term->paste_pos += n;
5723 if (term->paste_pos < term->paste_len) {
5724 queue_toplevel_callback(term_paste_callback, term);
5728 sfree(term->paste_buffer);
5729 term->paste_buffer = NULL;
5730 term->paste_len = 0;
5733 void term_do_paste(Terminal *term)
5738 get_clip(term->frontend, &data, &len);
5739 if (data && len > 0) {
5742 term_seen_key_event(term); /* pasted data counts */
5744 if (term->paste_buffer)
5745 sfree(term->paste_buffer);
5746 term->paste_pos = term->paste_len = 0;
5747 term->paste_buffer = snewn(len + 12, wchar_t);
5749 if (term->bracketed_paste) {
5750 memcpy(term->paste_buffer, L"\033[200~", 6 * sizeof(wchar_t));
5751 term->paste_len += 6;
5755 while (p < data + len) {
5756 while (p < data + len &&
5757 !(p <= data + len - sel_nl_sz &&
5758 !memcmp(p, sel_nl, sizeof(sel_nl))))
5763 for (i = 0; i < p - q; i++) {
5764 term->paste_buffer[term->paste_len++] = q[i];
5768 if (p <= data + len - sel_nl_sz &&
5769 !memcmp(p, sel_nl, sizeof(sel_nl))) {
5770 term->paste_buffer[term->paste_len++] = '\015';
5776 if (term->bracketed_paste) {
5777 memcpy(term->paste_buffer + term->paste_len,
5778 L"\033[201~", 6 * sizeof(wchar_t));
5779 term->paste_len += 6;
5782 /* Assume a small paste will be OK in one go. */
5783 if (term->paste_len < 256) {
5785 luni_send(term->ldisc, term->paste_buffer, term->paste_len, 0);
5786 if (term->paste_buffer)
5787 sfree(term->paste_buffer);
5788 term->paste_buffer = 0;
5789 term->paste_pos = term->paste_len = 0;
5792 get_clip(term->frontend, NULL, NULL);
5794 queue_toplevel_callback(term_paste_callback, term);
5797 void term_mouse(Terminal *term, Mouse_Button braw, Mouse_Button bcooked,
5798 Mouse_Action a, int x, int y, int shift, int ctrl, int alt)
5802 int raw_mouse = (term->xterm_mouse &&
5803 !term->no_mouse_rep &&
5804 !(term->mouse_override && shift));
5805 int default_seltype;
5809 if (a == MA_DRAG && !raw_mouse)
5810 term_scroll(term, 0, -1);
5812 if (y >= term->rows) {
5814 if (a == MA_DRAG && !raw_mouse)
5815 term_scroll(term, 0, +1);
5824 if (x >= term->cols)
5827 selpoint.y = y + term->disptop;
5828 ldata = lineptr(selpoint.y);
5830 if ((ldata->lattr & LATTR_MODE) != LATTR_NORM)
5834 * Transform x through the bidi algorithm to find the _logical_
5835 * click point from the physical one.
5837 if (term_bidi_line(term, ldata, y) != NULL) {
5838 x = term->post_bidi_cache[y].backward[x];
5845 * If we're in the middle of a selection operation, we ignore raw
5846 * mouse mode until it's done (we must have been not in raw mouse
5847 * mode when it started).
5848 * This makes use of Shift for selection reliable, and avoids the
5849 * host seeing mouse releases for which they never saw corresponding
5853 (term->selstate != ABOUT_TO) && (term->selstate != DRAGGING)) {
5854 int encstate = 0, r, c;
5862 encstate = 0x00; /* left button down */
5873 case MBT_WHEEL_DOWN:
5876 default: break; /* placate gcc warning about enum use */
5880 if (term->xterm_mouse == 1)
5885 /* If multiple extensions are enabled, the xterm 1006 is used, so it's okay to check for only that */
5886 if (!term->xterm_extended_mouse)
5888 term->mouse_is_down = 0;
5891 if (term->mouse_is_down == braw)
5893 term->mouse_is_down = braw;
5895 default: break; /* placate gcc warning about enum use */
5904 /* Check the extensions in decreasing order of preference. Encoding the release event above assumes that 1006 comes first. */
5905 if (term->xterm_extended_mouse) {
5906 len = sprintf(abuf, "\033[<%d;%d;%d%c", encstate, c, r, a == MA_RELEASE ? 'm' : 'M');
5907 } else if (term->urxvt_extended_mouse) {
5908 len = sprintf(abuf, "\033[%d;%d;%dM", encstate + 32, c, r);
5909 } else if (c <= 223 && r <= 223) {
5910 len = sprintf(abuf, "\033[M%c%c%c", encstate + 32, c + 32, r + 32);
5912 ldisc_send(term->ldisc, abuf, len, 0);
5918 * Set the selection type (rectangular or normal) at the start
5919 * of a selection attempt, from the state of Alt.
5921 if (!alt ^ !term->rect_select)
5922 default_seltype = RECTANGULAR;
5924 default_seltype = LEXICOGRAPHIC;
5926 if (term->selstate == NO_SELECTION) {
5927 term->seltype = default_seltype;
5930 if (bcooked == MBT_SELECT && a == MA_CLICK) {
5932 term->selstate = ABOUT_TO;
5933 term->seltype = default_seltype;
5934 term->selanchor = selpoint;
5935 term->selmode = SM_CHAR;
5936 } else if (bcooked == MBT_SELECT && (a == MA_2CLK || a == MA_3CLK)) {
5938 term->selmode = (a == MA_2CLK ? SM_WORD : SM_LINE);
5939 term->selstate = DRAGGING;
5940 term->selstart = term->selanchor = selpoint;
5941 term->selend = term->selstart;
5942 incpos(term->selend);
5944 } else if ((bcooked == MBT_SELECT && a == MA_DRAG) ||
5945 (bcooked == MBT_EXTEND && a != MA_RELEASE)) {
5946 if (term->selstate == ABOUT_TO && poseq(term->selanchor, selpoint))
5948 if (bcooked == MBT_EXTEND && a != MA_DRAG &&
5949 term->selstate == SELECTED) {
5950 if (term->seltype == LEXICOGRAPHIC) {
5952 * For normal selection, we extend by moving
5953 * whichever end of the current selection is closer
5956 if (posdiff(selpoint, term->selstart) <
5957 posdiff(term->selend, term->selstart) / 2) {
5958 term->selanchor = term->selend;
5959 decpos(term->selanchor);
5961 term->selanchor = term->selstart;
5965 * For rectangular selection, we have a choice of
5966 * _four_ places to put selanchor and selpoint: the
5967 * four corners of the selection.
5969 if (2*selpoint.x < term->selstart.x + term->selend.x)
5970 term->selanchor.x = term->selend.x-1;
5972 term->selanchor.x = term->selstart.x;
5974 if (2*selpoint.y < term->selstart.y + term->selend.y)
5975 term->selanchor.y = term->selend.y;
5977 term->selanchor.y = term->selstart.y;
5979 term->selstate = DRAGGING;
5981 if (term->selstate != ABOUT_TO && term->selstate != DRAGGING)
5982 term->selanchor = selpoint;
5983 term->selstate = DRAGGING;
5984 if (term->seltype == LEXICOGRAPHIC) {
5986 * For normal selection, we set (selstart,selend) to
5987 * (selpoint,selanchor) in some order.
5989 if (poslt(selpoint, term->selanchor)) {
5990 term->selstart = selpoint;
5991 term->selend = term->selanchor;
5992 incpos(term->selend);
5994 term->selstart = term->selanchor;
5995 term->selend = selpoint;
5996 incpos(term->selend);
6000 * For rectangular selection, we may need to
6001 * interchange x and y coordinates (if the user has
6002 * dragged in the -x and +y directions, or vice versa).
6004 term->selstart.x = min(term->selanchor.x, selpoint.x);
6005 term->selend.x = 1+max(term->selanchor.x, selpoint.x);
6006 term->selstart.y = min(term->selanchor.y, selpoint.y);
6007 term->selend.y = max(term->selanchor.y, selpoint.y);
6010 } else if ((bcooked == MBT_SELECT || bcooked == MBT_EXTEND) &&
6012 if (term->selstate == DRAGGING) {
6014 * We've completed a selection. We now transfer the
6015 * data to the clipboard.
6017 clipme(term, term->selstart, term->selend,
6018 (term->seltype == RECTANGULAR), FALSE);
6019 term->selstate = SELECTED;
6021 term->selstate = NO_SELECTION;
6022 } else if (bcooked == MBT_PASTE
6024 #if MULTICLICK_ONLY_EVENT
6025 || a == MA_2CLK || a == MA_3CLK
6028 request_paste(term->frontend);
6032 * Since terminal output is suppressed during drag-selects, we
6033 * should make sure to write any pending output if one has just
6036 if (term->selstate != DRAGGING)
6041 int format_arrow_key(char *buf, Terminal *term, int xkey, int ctrl)
6045 if (term->vt52_mode)
6046 p += sprintf((char *) p, "\x1B%c", xkey);
6048 int app_flg = (term->app_cursor_keys && !term->no_applic_c);
6051 * RDB: VT100 & VT102 manuals both state the app cursor
6052 * keys only work if the app keypad is on.
6054 * SGT: That may well be true, but xterm disagrees and so
6055 * does at least one application, so I've #if'ed this out
6056 * and the behaviour is back to PuTTY's original: app
6057 * cursor and app keypad are independently switchable
6058 * modes. If anyone complains about _this_ I'll have to
6059 * put in a configurable option.
6061 if (!term->app_keypad_keys)
6064 /* Useful mapping of Ctrl-arrows */
6069 p += sprintf((char *) p, "\x1BO%c", xkey);
6071 p += sprintf((char *) p, "\x1B[%c", xkey);
6077 void term_nopaste(Terminal *term)
6079 if (term->paste_len == 0)
6081 sfree(term->paste_buffer);
6082 term->paste_buffer = NULL;
6083 term->paste_len = 0;
6086 static void deselect(Terminal *term)
6088 term->selstate = NO_SELECTION;
6089 term->selstart.x = term->selstart.y = term->selend.x = term->selend.y = 0;
6092 void term_deselect(Terminal *term)
6098 * Since terminal output is suppressed during drag-selects, we
6099 * should make sure to write any pending output if one has just
6102 if (term->selstate != DRAGGING)
6106 int term_ldisc(Terminal *term, int option)
6108 if (option == LD_ECHO)
6109 return term->term_echoing;
6110 if (option == LD_EDIT)
6111 return term->term_editing;
6115 int term_data(Terminal *term, int is_stderr, const char *data, int len)
6117 bufchain_add(&term->inbuf, data, len);
6119 if (!term->in_term_out) {
6120 term->in_term_out = TRUE;
6121 term_reset_cblink(term);
6123 * During drag-selects, we do not process terminal input,
6124 * because the user will want the screen to hold still to
6127 if (term->selstate != DRAGGING)
6129 term->in_term_out = FALSE;
6133 * term_out() always completely empties inbuf. Therefore,
6134 * there's no reason at all to return anything other than zero
6135 * from this function, because there _can't_ be a question of
6136 * the remote side needing to wait until term_out() has cleared
6139 * This is a slightly suboptimal way to deal with SSH-2 - in
6140 * principle, the window mechanism would allow us to continue
6141 * to accept data on forwarded ports and X connections even
6142 * while the terminal processing was going slowly - but we
6143 * can't do the 100% right thing without moving the terminal
6144 * processing into a separate thread, and that might hurt
6145 * portability. So we manage stdout buffering the old SSH-1 way:
6146 * if the terminal processing goes slowly, the whole SSH
6147 * connection stops accepting data until it's ready.
6149 * In practice, I can't imagine this causing serious trouble.
6155 * Write untrusted data to the terminal.
6156 * The only control character that should be honoured is \n (which
6157 * will behave as a CRLF).
6159 int term_data_untrusted(Terminal *term, const char *data, int len)
6162 /* FIXME: more sophisticated checking? */
6163 for (i = 0; i < len; i++) {
6164 if (data[i] == '\n')
6165 term_data(term, 1, "\r\n", 2);
6166 else if (data[i] & 0x60)
6167 term_data(term, 1, data + i, 1);
6169 return 0; /* assumes that term_data() always returns 0 */
6172 void term_provide_logctx(Terminal *term, void *logctx)
6174 term->logctx = logctx;
6177 void term_set_focus(Terminal *term, int has_focus)
6179 term->has_focus = has_focus;
6180 term_schedule_cblink(term);
6184 * Provide "auto" settings for remote tty modes, suitable for an
6185 * application with a terminal window.
6187 char *term_get_ttymode(Terminal *term, const char *mode)
6190 if (strcmp(mode, "ERASE") == 0) {
6191 val = term->bksp_is_delete ? "^?" : "^H";
6193 /* FIXME: perhaps we should set ONLCR based on lfhascr as well? */
6194 /* FIXME: or ECHO and friends based on local echo state? */
6198 struct term_userpass_state {
6200 int done_prompt; /* printed out prompt yet? */
6201 size_t pos; /* cursor position */
6205 * Process some terminal data in the course of username/password
6208 int term_get_userpass_input(Terminal *term, prompts_t *p,
6209 unsigned char *in, int inlen)
6211 struct term_userpass_state *s = (struct term_userpass_state *)p->data;
6214 * First call. Set some stuff up.
6216 p->data = s = snew(struct term_userpass_state);
6219 /* We only print the `name' caption if we have to... */
6220 if (p->name_reqd && p->name) {
6221 size_t l = strlen(p->name);
6222 term_data_untrusted(term, p->name, l);
6223 if (p->name[l-1] != '\n')
6224 term_data_untrusted(term, "\n", 1);
6226 /* ...but we always print any `instruction'. */
6227 if (p->instruction) {
6228 size_t l = strlen(p->instruction);
6229 term_data_untrusted(term, p->instruction, l);
6230 if (p->instruction[l-1] != '\n')
6231 term_data_untrusted(term, "\n", 1);
6234 * Zero all the results, in case we abort half-way through.
6238 for (i = 0; i < (int)p->n_prompts; i++)
6239 prompt_set_result(p->prompts[i], "");
6243 while (s->curr_prompt < p->n_prompts) {
6245 prompt_t *pr = p->prompts[s->curr_prompt];
6246 int finished_prompt = 0;
6248 if (!s->done_prompt) {
6249 term_data_untrusted(term, pr->prompt, strlen(pr->prompt));
6254 /* Breaking out here ensures that the prompt is printed even
6255 * if we're now waiting for user data. */
6256 if (!in || !inlen) break;
6258 /* FIXME: should we be using local-line-editing code instead? */
6259 while (!finished_prompt && inlen) {
6265 term_data(term, 0, "\r\n", 2);
6266 prompt_ensure_result_size(pr, s->pos + 1);
6267 pr->result[s->pos] = '\0';
6268 /* go to next prompt, if any */
6271 finished_prompt = 1; /* break out */
6277 term_data(term, 0, "\b \b", 3);
6283 while (s->pos > 0) {
6285 term_data(term, 0, "\b \b", 3);
6291 /* Immediate abort. */
6292 term_data(term, 0, "\r\n", 2);
6295 return 0; /* user abort */
6298 * This simplistic check for printability is disabled
6299 * when we're doing password input, because some people
6300 * have control characters in their passwords.
6302 if (!pr->echo || (c >= ' ' && c <= '~') ||
6303 ((unsigned char) c >= 160)) {
6304 prompt_ensure_result_size(pr, s->pos + 1);
6305 pr->result[s->pos++] = c;
6307 term_data(term, 0, &c, 1);
6315 if (s->curr_prompt < p->n_prompts) {
6316 return -1; /* more data required */
6320 return +1; /* all done */