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 term->last_paste = 0;
1528 bufchain_init(&term->inbuf);
1529 bufchain_init(&term->printer_buf);
1530 term->printing = term->only_printing = FALSE;
1531 term->print_job = NULL;
1532 term->vt52_mode = FALSE;
1533 term->cr_lf_return = FALSE;
1534 term->seen_disp_event = FALSE;
1535 term->mouse_is_down = FALSE;
1536 term->reset_132 = FALSE;
1537 term->cblinker = term->tblinker = 0;
1538 term->has_focus = 1;
1539 term->repeat_off = FALSE;
1540 term->termstate = TOPLEVEL;
1541 term->selstate = NO_SELECTION;
1544 term_copy_stuff_from_conf(term);
1546 term->screen = term->alt_screen = term->scrollback = NULL;
1547 term->tempsblines = 0;
1548 term->alt_sblines = 0;
1550 term->disptext = NULL;
1551 term->dispcursx = term->dispcursy = -1;
1554 term->rows = term->cols = -1;
1555 power_on(term, TRUE);
1556 term->beephead = term->beeptail = NULL;
1557 #ifdef OPTIMISE_SCROLL
1558 term->scrollhead = term->scrolltail = NULL;
1559 #endif /* OPTIMISE_SCROLL */
1561 term->lastbeep = FALSE;
1562 term->beep_overloaded = FALSE;
1563 term->attr_mask = 0xffffffff;
1564 term->resize_fn = NULL;
1565 term->resize_ctx = NULL;
1566 term->in_term_out = FALSE;
1568 term->ltemp_size = 0;
1569 term->wcFrom = NULL;
1571 term->wcFromTo_size = 0;
1573 term->window_update_pending = FALSE;
1575 term->bidi_cache_size = 0;
1576 term->pre_bidi_cache = term->post_bidi_cache = NULL;
1579 term->basic_erase_char.chr = CSET_ASCII | ' ';
1580 term->basic_erase_char.attr = ATTR_DEFAULT;
1581 term->basic_erase_char.cc_next = 0;
1582 term->erase_char = term->basic_erase_char;
1587 void term_free(Terminal *term)
1590 struct beeptime *beep;
1593 while ((line = delpos234(term->scrollback, 0)) != NULL)
1594 sfree(line); /* compressed data, not a termline */
1595 freetree234(term->scrollback);
1596 while ((line = delpos234(term->screen, 0)) != NULL)
1598 freetree234(term->screen);
1599 while ((line = delpos234(term->alt_screen, 0)) != NULL)
1601 freetree234(term->alt_screen);
1602 if (term->disptext) {
1603 for (i = 0; i < term->rows; i++)
1604 freeline(term->disptext[i]);
1606 sfree(term->disptext);
1607 while (term->beephead) {
1608 beep = term->beephead;
1609 term->beephead = beep->next;
1612 bufchain_clear(&term->inbuf);
1614 printer_finish_job(term->print_job);
1615 bufchain_clear(&term->printer_buf);
1616 sfree(term->paste_buffer);
1618 sfree(term->wcFrom);
1621 for (i = 0; i < term->bidi_cache_size; i++) {
1622 sfree(term->pre_bidi_cache[i].chars);
1623 sfree(term->post_bidi_cache[i].chars);
1624 sfree(term->post_bidi_cache[i].forward);
1625 sfree(term->post_bidi_cache[i].backward);
1627 sfree(term->pre_bidi_cache);
1628 sfree(term->post_bidi_cache);
1632 expire_timer_context(term);
1634 conf_free(term->conf);
1640 * Set up the terminal for a given size.
1642 void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
1645 termline **newdisp, *line;
1646 int i, j, oldrows = term->rows;
1648 int save_alt_which = term->alt_which;
1650 if (newrows == term->rows && newcols == term->cols &&
1651 newsavelines == term->savelines)
1652 return; /* nothing to do */
1654 /* Behave sensibly if we're given zero (or negative) rows/cols */
1656 if (newrows < 1) newrows = 1;
1657 if (newcols < 1) newcols = 1;
1660 swap_screen(term, 0, FALSE, FALSE);
1662 term->alt_t = term->marg_t = 0;
1663 term->alt_b = term->marg_b = newrows - 1;
1665 if (term->rows == -1) {
1666 term->scrollback = newtree234(NULL);
1667 term->screen = newtree234(NULL);
1668 term->tempsblines = 0;
1673 * Resize the screen and scrollback. We only need to shift
1674 * lines around within our data structures, because lineptr()
1675 * will take care of resizing each individual line if
1678 * - If the new screen is longer, we shunt lines in from temporary
1679 * scrollback if possible, otherwise we add new blank lines at
1682 * - If the new screen is shorter, we remove any blank lines at
1683 * the bottom if possible, otherwise shunt lines above the cursor
1684 * to scrollback if possible, otherwise delete lines below the
1687 * - Then, if the new scrollback length is less than the
1688 * amount of scrollback we actually have, we must throw some
1691 sblen = count234(term->scrollback);
1692 /* Do this loop to expand the screen if newrows > rows */
1693 assert(term->rows == count234(term->screen));
1694 while (term->rows < newrows) {
1695 if (term->tempsblines > 0) {
1696 unsigned char *cline;
1697 /* Insert a line from the scrollback at the top of the screen. */
1698 assert(sblen >= term->tempsblines);
1699 cline = delpos234(term->scrollback, --sblen);
1700 line = decompressline(cline, NULL);
1702 line->temporary = FALSE; /* reconstituted line is now real */
1703 term->tempsblines -= 1;
1704 addpos234(term->screen, line, 0);
1706 term->savecurs.y += 1;
1708 term->alt_savecurs.y += 1;
1710 /* Add a new blank line at the bottom of the screen. */
1711 line = newline(term, newcols, FALSE);
1712 addpos234(term->screen, line, count234(term->screen));
1716 /* Do this loop to shrink the screen if newrows < rows */
1717 while (term->rows > newrows) {
1718 if (term->curs.y < term->rows - 1) {
1719 /* delete bottom row, unless it contains the cursor */
1720 line = delpos234(term->screen, term->rows - 1);
1723 /* push top row to scrollback */
1724 line = delpos234(term->screen, 0);
1725 addpos234(term->scrollback, compressline(line), sblen++);
1727 term->tempsblines += 1;
1729 term->savecurs.y -= 1;
1731 term->alt_savecurs.y -= 1;
1735 assert(term->rows == newrows);
1736 assert(count234(term->screen) == newrows);
1738 /* Delete any excess lines from the scrollback. */
1739 while (sblen > newsavelines) {
1740 line = delpos234(term->scrollback, 0);
1744 if (sblen < term->tempsblines)
1745 term->tempsblines = sblen;
1746 assert(count234(term->scrollback) <= newsavelines);
1747 assert(count234(term->scrollback) >= term->tempsblines);
1750 /* Make a new displayed text buffer. */
1751 newdisp = snewn(newrows, termline *);
1752 for (i = 0; i < newrows; i++) {
1753 newdisp[i] = newline(term, newcols, FALSE);
1754 for (j = 0; j < newcols; j++)
1755 newdisp[i]->chars[j].attr = ATTR_INVALID;
1757 if (term->disptext) {
1758 for (i = 0; i < oldrows; i++)
1759 freeline(term->disptext[i]);
1761 sfree(term->disptext);
1762 term->disptext = newdisp;
1763 term->dispcursx = term->dispcursy = -1;
1765 /* Make a new alternate screen. */
1766 newalt = newtree234(NULL);
1767 for (i = 0; i < newrows; i++) {
1768 line = newline(term, newcols, TRUE);
1769 addpos234(newalt, line, i);
1771 if (term->alt_screen) {
1772 while (NULL != (line = delpos234(term->alt_screen, 0)))
1774 freetree234(term->alt_screen);
1776 term->alt_screen = newalt;
1777 term->alt_sblines = 0;
1779 term->tabs = sresize(term->tabs, newcols, unsigned char);
1782 for (i = (term->cols > 0 ? term->cols : 0); i < newcols; i++)
1783 term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
1786 /* Check that the cursor positions are still valid. */
1787 if (term->savecurs.y < 0)
1788 term->savecurs.y = 0;
1789 if (term->savecurs.y >= newrows)
1790 term->savecurs.y = newrows - 1;
1791 if (term->savecurs.x >= newcols)
1792 term->savecurs.x = newcols - 1;
1793 if (term->alt_savecurs.y < 0)
1794 term->alt_savecurs.y = 0;
1795 if (term->alt_savecurs.y >= newrows)
1796 term->alt_savecurs.y = newrows - 1;
1797 if (term->alt_savecurs.x >= newcols)
1798 term->alt_savecurs.x = newcols - 1;
1799 if (term->curs.y < 0)
1801 if (term->curs.y >= newrows)
1802 term->curs.y = newrows - 1;
1803 if (term->curs.x >= newcols)
1804 term->curs.x = newcols - 1;
1805 if (term->alt_y < 0)
1807 if (term->alt_y >= newrows)
1808 term->alt_y = newrows - 1;
1809 if (term->alt_x >= newcols)
1810 term->alt_x = newcols - 1;
1811 term->alt_x = term->alt_y = 0;
1812 term->wrapnext = term->alt_wnext = FALSE;
1814 term->rows = newrows;
1815 term->cols = newcols;
1816 term->savelines = newsavelines;
1818 swap_screen(term, save_alt_which, FALSE, FALSE);
1822 if (term->resize_fn)
1823 term->resize_fn(term->resize_ctx, term->cols, term->rows);
1827 * Hand a function and context pointer to the terminal which it can
1828 * use to notify a back end of resizes.
1830 void term_provide_resize_fn(Terminal *term,
1831 void (*resize_fn)(void *, int, int),
1834 term->resize_fn = resize_fn;
1835 term->resize_ctx = resize_ctx;
1836 if (resize_fn && term->cols > 0 && term->rows > 0)
1837 resize_fn(resize_ctx, term->cols, term->rows);
1840 /* Find the bottom line on the screen that has any content.
1841 * If only the top line has content, returns 0.
1842 * If no lines have content, return -1.
1844 static int find_last_nonempty_line(Terminal * term, tree234 * screen)
1847 for (i = count234(screen) - 1; i >= 0; i--) {
1848 termline *line = index234(screen, i);
1850 for (j = 0; j < line->cols; j++)
1851 if (!termchars_equal(&line->chars[j], &term->erase_char))
1853 if (j != line->cols) break;
1859 * Swap screens. If `reset' is TRUE and we have been asked to
1860 * switch to the alternate screen, we must bring most of its
1861 * configuration from the main screen and erase the contents of the
1862 * alternate screen completely. (This is even true if we're already
1863 * on it! Blame xterm.)
1865 static void swap_screen(Terminal *term, int which, int reset, int keep_cur_pos)
1872 reset = FALSE; /* do no weird resetting if which==0 */
1874 if (which != term->alt_which) {
1875 term->alt_which = which;
1877 ttr = term->alt_screen;
1878 term->alt_screen = term->screen;
1880 term->alt_sblines = find_last_nonempty_line(term, term->alt_screen) + 1;
1882 if (!reset && !keep_cur_pos)
1883 term->curs.x = term->alt_x;
1886 if (!reset && !keep_cur_pos)
1887 term->curs.y = term->alt_y;
1890 if (!reset) term->marg_t = term->alt_t;
1893 if (!reset) term->marg_b = term->alt_b;
1896 if (!reset) term->dec_om = term->alt_om;
1899 if (!reset) term->wrap = term->alt_wrap;
1902 if (!reset) term->wrapnext = term->alt_wnext;
1903 term->alt_wnext = t;
1905 if (!reset) term->insert = term->alt_ins;
1908 if (!reset) term->cset = term->alt_cset;
1911 if (!reset) term->utf = term->alt_utf;
1914 if (!reset) term->sco_acs = term->alt_sco_acs;
1915 term->alt_sco_acs = t;
1917 tp = term->savecurs;
1918 if (!reset && !keep_cur_pos)
1919 term->savecurs = term->alt_savecurs;
1920 term->alt_savecurs = tp;
1921 t = term->save_cset;
1922 if (!reset && !keep_cur_pos)
1923 term->save_cset = term->alt_save_cset;
1924 term->alt_save_cset = t;
1925 t = term->save_csattr;
1926 if (!reset && !keep_cur_pos)
1927 term->save_csattr = term->alt_save_csattr;
1928 term->alt_save_csattr = t;
1929 t = term->save_attr;
1930 if (!reset && !keep_cur_pos)
1931 term->save_attr = term->alt_save_attr;
1932 term->alt_save_attr = t;
1934 if (!reset && !keep_cur_pos)
1935 term->save_utf = term->alt_save_utf;
1936 term->alt_save_utf = t;
1937 t = term->save_wnext;
1938 if (!reset && !keep_cur_pos)
1939 term->save_wnext = term->alt_save_wnext;
1940 term->alt_save_wnext = t;
1941 t = term->save_sco_acs;
1942 if (!reset && !keep_cur_pos)
1943 term->save_sco_acs = term->alt_save_sco_acs;
1944 term->alt_save_sco_acs = t;
1947 if (reset && term->screen) {
1949 * Yes, this _is_ supposed to honour background-colour-erase.
1951 erase_lots(term, FALSE, TRUE, TRUE);
1956 * Update the scroll bar.
1958 static void update_sbar(Terminal *term)
1960 int nscroll = sblines(term);
1961 set_sbar(term->frontend, nscroll + term->rows,
1962 nscroll + term->disptop, term->rows);
1966 * Check whether the region bounded by the two pointers intersects
1967 * the scroll region, and de-select the on-screen selection if so.
1969 static void check_selection(Terminal *term, pos from, pos to)
1971 if (poslt(from, term->selend) && poslt(term->selstart, to))
1976 * Scroll the screen. (`lines' is +ve for scrolling forward, -ve
1977 * for backward.) `sb' is TRUE if the scrolling is permitted to
1978 * affect the scrollback buffer.
1980 static void scroll(Terminal *term, int topline, int botline, int lines, int sb)
1983 int i, seltop, scrollwinsize;
1984 #ifdef OPTIMISE_SCROLL
1985 int olddisptop, shift;
1986 #endif /* OPTIMISE_SCROLL */
1988 if (topline != 0 || term->alt_which != 0)
1991 #ifdef OPTIMISE_SCROLL
1992 olddisptop = term->disptop;
1994 #endif /* OPTIMISE_SCROLL */
1996 scrollwinsize = botline - topline + 1;
2000 if (lines > scrollwinsize)
2001 lines = scrollwinsize;
2002 while (lines-- > 0) {
2003 line = delpos234(term->screen, botline);
2004 resizeline(term, line, term->cols);
2005 for (i = 0; i < term->cols; i++)
2006 copy_termchar(line, i, &term->erase_char);
2007 line->lattr = LATTR_NORM;
2008 addpos234(term->screen, line, topline);
2010 if (term->selstart.y >= topline && term->selstart.y <= botline) {
2012 if (term->selstart.y > botline) {
2013 term->selstart.y = botline + 1;
2014 term->selstart.x = 0;
2017 if (term->selend.y >= topline && term->selend.y <= botline) {
2019 if (term->selend.y > botline) {
2020 term->selend.y = botline + 1;
2026 if (lines > scrollwinsize)
2027 lines = scrollwinsize;
2028 while (lines-- > 0) {
2029 line = delpos234(term->screen, topline);
2030 #ifdef TERM_CC_DIAGS
2033 if (sb && term->savelines > 0) {
2034 int sblen = count234(term->scrollback);
2036 * We must add this line to the scrollback. We'll
2037 * remove a line from the top of the scrollback if
2038 * the scrollback is full.
2040 if (sblen == term->savelines) {
2041 unsigned char *cline;
2044 cline = delpos234(term->scrollback, 0);
2047 term->tempsblines += 1;
2049 addpos234(term->scrollback, compressline(line), sblen);
2051 /* now `line' itself can be reused as the bottom line */
2054 * If the user is currently looking at part of the
2055 * scrollback, and they haven't enabled any options
2056 * that are going to reset the scrollback as a
2057 * result of this movement, then the chances are
2058 * they'd like to keep looking at the same line. So
2059 * we move their viewpoint at the same rate as the
2060 * scroll, at least until their viewpoint hits the
2061 * top end of the scrollback buffer, at which point
2062 * we don't have the choice any more.
2064 * Thanks to Jan Holmen Holsten for the idea and
2065 * initial implementation.
2067 if (term->disptop > -term->savelines && term->disptop < 0)
2070 resizeline(term, line, term->cols);
2071 for (i = 0; i < term->cols; i++)
2072 copy_termchar(line, i, &term->erase_char);
2073 line->lattr = LATTR_NORM;
2074 addpos234(term->screen, line, botline);
2077 * If the selection endpoints move into the scrollback,
2078 * we keep them moving until they hit the top. However,
2079 * of course, if the line _hasn't_ moved into the
2080 * scrollback then we don't do this, and cut them off
2081 * at the top of the scroll region.
2083 * This applies to selstart and selend (for an existing
2084 * selection), and also selanchor (for one being
2085 * selected as we speak).
2087 seltop = sb ? -term->savelines : topline;
2089 if (term->selstate != NO_SELECTION) {
2090 if (term->selstart.y >= seltop &&
2091 term->selstart.y <= botline) {
2093 if (term->selstart.y < seltop) {
2094 term->selstart.y = seltop;
2095 term->selstart.x = 0;
2098 if (term->selend.y >= seltop && term->selend.y <= botline) {
2100 if (term->selend.y < seltop) {
2101 term->selend.y = seltop;
2105 if (term->selanchor.y >= seltop &&
2106 term->selanchor.y <= botline) {
2107 term->selanchor.y--;
2108 if (term->selanchor.y < seltop) {
2109 term->selanchor.y = seltop;
2110 term->selanchor.x = 0;
2116 #ifdef OPTIMISE_SCROLL
2117 shift += term->disptop - olddisptop;
2118 if (shift < term->rows && shift > -term->rows && shift != 0)
2119 scroll_display(term, topline, botline, shift);
2120 #endif /* OPTIMISE_SCROLL */
2123 #ifdef OPTIMISE_SCROLL
2125 * Add a scroll of a region on the screen into the pending scroll list.
2126 * `lines' is +ve for scrolling forward, -ve for backward.
2128 * If the scroll is on the same area as the last scroll in the list,
2131 static void save_scroll(Terminal *term, int topline, int botline, int lines)
2133 struct scrollregion *newscroll;
2134 if (term->scrolltail &&
2135 term->scrolltail->topline == topline &&
2136 term->scrolltail->botline == botline) {
2137 term->scrolltail->lines += lines;
2139 newscroll = snew(struct scrollregion);
2140 newscroll->topline = topline;
2141 newscroll->botline = botline;
2142 newscroll->lines = lines;
2143 newscroll->next = NULL;
2145 if (!term->scrollhead)
2146 term->scrollhead = newscroll;
2148 term->scrolltail->next = newscroll;
2149 term->scrolltail = newscroll;
2154 * Scroll the physical display, and our conception of it in disptext.
2156 static void scroll_display(Terminal *term, int topline, int botline, int lines)
2158 int distance, nlines, i, j;
2160 distance = lines > 0 ? lines : -lines;
2161 nlines = botline - topline + 1 - distance;
2163 for (i = 0; i < nlines; i++)
2164 for (j = 0; j < term->cols; j++)
2165 copy_termchar(term->disptext[i], j,
2166 term->disptext[i+distance]->chars+j);
2167 if (term->dispcursy >= 0 &&
2168 term->dispcursy >= topline + distance &&
2169 term->dispcursy < topline + distance + nlines)
2170 term->dispcursy -= distance;
2171 for (i = 0; i < distance; i++)
2172 for (j = 0; j < term->cols; j++)
2173 term->disptext[nlines+i]->chars[j].attr |= ATTR_INVALID;
2175 for (i = nlines; i-- ;)
2176 for (j = 0; j < term->cols; j++)
2177 copy_termchar(term->disptext[i+distance], j,
2178 term->disptext[i]->chars+j);
2179 if (term->dispcursy >= 0 &&
2180 term->dispcursy >= topline &&
2181 term->dispcursy < topline + nlines)
2182 term->dispcursy += distance;
2183 for (i = 0; i < distance; i++)
2184 for (j = 0; j < term->cols; j++)
2185 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
2187 save_scroll(term, topline, botline, lines);
2189 #endif /* OPTIMISE_SCROLL */
2192 * Move the cursor to a given position, clipping at boundaries. We
2193 * may or may not want to clip at the scroll margin: marg_clip is 0
2194 * not to, 1 to disallow _passing_ the margins, and 2 to disallow
2195 * even _being_ outside the margins.
2197 static void move(Terminal *term, int x, int y, int marg_clip)
2201 if (x >= term->cols)
2204 if ((term->curs.y >= term->marg_t || marg_clip == 2) &&
2207 if ((term->curs.y <= term->marg_b || marg_clip == 2) &&
2213 if (y >= term->rows)
2217 term->wrapnext = FALSE;
2221 * Save or restore the cursor and SGR mode.
2223 static void save_cursor(Terminal *term, int save)
2226 term->savecurs = term->curs;
2227 term->save_attr = term->curr_attr;
2228 term->save_cset = term->cset;
2229 term->save_utf = term->utf;
2230 term->save_wnext = term->wrapnext;
2231 term->save_csattr = term->cset_attr[term->cset];
2232 term->save_sco_acs = term->sco_acs;
2234 term->curs = term->savecurs;
2235 /* Make sure the window hasn't shrunk since the save */
2236 if (term->curs.x >= term->cols)
2237 term->curs.x = term->cols - 1;
2238 if (term->curs.y >= term->rows)
2239 term->curs.y = term->rows - 1;
2241 term->curr_attr = term->save_attr;
2242 term->cset = term->save_cset;
2243 term->utf = term->save_utf;
2244 term->wrapnext = term->save_wnext;
2246 * wrapnext might reset to False if the x position is no
2247 * longer at the rightmost edge.
2249 if (term->wrapnext && term->curs.x < term->cols-1)
2250 term->wrapnext = FALSE;
2251 term->cset_attr[term->cset] = term->save_csattr;
2252 term->sco_acs = term->save_sco_acs;
2253 set_erase_char(term);
2258 * This function is called before doing _anything_ which affects
2259 * only part of a line of text. It is used to mark the boundary
2260 * between two character positions, and it indicates that some sort
2261 * of effect is going to happen on only one side of that boundary.
2263 * The effect of this function is to check whether a CJK
2264 * double-width character is straddling the boundary, and to remove
2265 * it and replace it with two spaces if so. (Of course, one or
2266 * other of those spaces is then likely to be replaced with
2267 * something else again, as a result of whatever happens next.)
2269 * Also, if the boundary is at the right-hand _edge_ of the screen,
2270 * it implies something deliberate is being done to the rightmost
2271 * column position; hence we must clear LATTR_WRAPPED2.
2273 * The input to the function is the coordinates of the _second_
2274 * character of the pair.
2276 static void check_boundary(Terminal *term, int x, int y)
2280 /* Validate input coordinates, just in case. */
2281 if (x == 0 || x > term->cols)
2284 ldata = scrlineptr(y);
2285 if (x == term->cols) {
2286 ldata->lattr &= ~LATTR_WRAPPED2;
2288 if (ldata->chars[x].chr == UCSWIDE) {
2289 clear_cc(ldata, x-1);
2291 ldata->chars[x-1].chr = ' ' | CSET_ASCII;
2292 ldata->chars[x] = ldata->chars[x-1];
2298 * Erase a large portion of the screen: the whole screen, or the
2299 * whole line, or parts thereof.
2301 static void erase_lots(Terminal *term,
2302 int line_only, int from_begin, int to_end)
2306 int erasing_lines_from_top = 0;
2309 start.y = term->curs.y;
2311 end.y = term->curs.y + 1;
2313 erase_lattr = FALSE;
2328 if (!from_begin || !to_end)
2329 check_boundary(term, term->curs.x, term->curs.y);
2330 check_selection(term, start, end);
2332 /* Clear screen also forces a full window redraw, just in case. */
2333 if (start.y == 0 && start.x == 0 && end.y == term->rows)
2334 term_invalidate(term);
2336 /* Lines scrolled away shouldn't be brought back on if the terminal
2338 if (start.y == 0 && start.x == 0 && end.x == 0 && erase_lattr)
2339 erasing_lines_from_top = 1;
2341 if (term->erase_to_scrollback && erasing_lines_from_top) {
2342 /* If it's a whole number of lines, starting at the top, and
2343 * we're fully erasing them, erase by scrolling and keep the
2344 * lines in the scrollback. */
2345 int scrolllines = end.y;
2346 if (end.y == term->rows) {
2347 /* Shrink until we find a non-empty row.*/
2348 scrolllines = find_last_nonempty_line(term, term->screen) + 1;
2350 if (scrolllines > 0)
2351 scroll(term, 0, scrolllines - 1, scrolllines, TRUE);
2353 termline *ldata = scrlineptr(start.y);
2354 while (poslt(start, end)) {
2355 if (start.x == term->cols) {
2357 ldata->lattr &= ~(LATTR_WRAPPED | LATTR_WRAPPED2);
2359 ldata->lattr = LATTR_NORM;
2361 copy_termchar(ldata, start.x, &term->erase_char);
2363 if (incpos(start) && start.y < term->rows) {
2364 ldata = scrlineptr(start.y);
2369 /* After an erase of lines from the top of the screen, we shouldn't
2370 * bring the lines back again if the terminal enlarges (since the user or
2371 * application has explictly thrown them away). */
2372 if (erasing_lines_from_top && !(term->alt_which))
2373 term->tempsblines = 0;
2377 * Insert or delete characters within the current line. n is +ve if
2378 * insertion is desired, and -ve for deletion.
2380 static void insch(Terminal *term, int n)
2382 int dir = (n < 0 ? -1 : +1);
2387 n = (n < 0 ? -n : n);
2388 if (n > term->cols - term->curs.x)
2389 n = term->cols - term->curs.x;
2390 m = term->cols - term->curs.x - n;
2391 cursplus.y = term->curs.y;
2392 cursplus.x = term->curs.x + n;
2393 check_selection(term, term->curs, cursplus);
2394 check_boundary(term, term->curs.x, term->curs.y);
2396 check_boundary(term, term->curs.x + n, term->curs.y);
2397 ldata = scrlineptr(term->curs.y);
2399 for (j = 0; j < m; j++)
2400 move_termchar(ldata,
2401 ldata->chars + term->curs.x + j,
2402 ldata->chars + term->curs.x + j + n);
2404 copy_termchar(ldata, term->curs.x + m++, &term->erase_char);
2407 move_termchar(ldata,
2408 ldata->chars + term->curs.x + j + n,
2409 ldata->chars + term->curs.x + j);
2411 copy_termchar(ldata, term->curs.x + n, &term->erase_char);
2416 * Toggle terminal mode `mode' to state `state'. (`query' indicates
2417 * whether the mode is a DEC private one or a normal one.)
2419 static void toggle_mode(Terminal *term, int mode, int query, int state)
2423 case 1: /* DECCKM: application cursor keys */
2424 term->app_cursor_keys = state;
2426 case 2: /* DECANM: VT52 mode */
2427 term->vt52_mode = !state;
2428 if (term->vt52_mode) {
2429 term->blink_is_real = FALSE;
2430 term->vt52_bold = FALSE;
2432 term->blink_is_real = term->blinktext;
2434 term_schedule_tblink(term);
2436 case 3: /* DECCOLM: 80/132 columns */
2438 if (!term->no_remote_resize)
2439 request_resize(term->frontend, state ? 132 : 80, term->rows);
2440 term->reset_132 = state;
2441 term->alt_t = term->marg_t = 0;
2442 term->alt_b = term->marg_b = term->rows - 1;
2443 move(term, 0, 0, 0);
2444 erase_lots(term, FALSE, TRUE, TRUE);
2446 case 5: /* DECSCNM: reverse video */
2448 * Toggle reverse video. If we receive an OFF within the
2449 * visual bell timeout period after an ON, we trigger an
2450 * effective visual bell, so that ESC[?5hESC[?5l will
2451 * always be an actually _visible_ visual bell.
2453 if (term->rvideo && !state) {
2454 /* This is an OFF, so set up a vbell */
2455 term_schedule_vbell(term, TRUE, term->rvbell_startpoint);
2456 } else if (!term->rvideo && state) {
2457 /* This is an ON, so we notice the time and save it. */
2458 term->rvbell_startpoint = GETTICKCOUNT();
2460 term->rvideo = state;
2461 seen_disp_event(term);
2463 case 6: /* DECOM: DEC origin mode */
2464 term->dec_om = state;
2466 case 7: /* DECAWM: auto wrap */
2469 case 8: /* DECARM: auto key repeat */
2470 term->repeat_off = !state;
2472 case 10: /* DECEDM: set local edit mode */
2473 term->term_editing = state;
2474 if (term->ldisc) /* cause ldisc to notice changes */
2475 ldisc_send(term->ldisc, NULL, 0, 0);
2477 case 25: /* DECTCEM: enable/disable cursor */
2478 compatibility2(OTHER, VT220);
2479 term->cursor_on = state;
2480 seen_disp_event(term);
2482 case 47: /* alternate screen */
2483 compatibility(OTHER);
2485 swap_screen(term, term->no_alt_screen ? 0 : state, FALSE, FALSE);
2488 case 1000: /* xterm mouse 1 (normal) */
2489 term->xterm_mouse = state ? 1 : 0;
2490 set_raw_mouse_mode(term->frontend, state);
2492 case 1002: /* xterm mouse 2 (inc. button drags) */
2493 term->xterm_mouse = state ? 2 : 0;
2494 set_raw_mouse_mode(term->frontend, state);
2496 case 1006: /* xterm extended mouse */
2497 term->xterm_extended_mouse = state ? 1 : 0;
2499 case 1015: /* urxvt extended mouse */
2500 term->urxvt_extended_mouse = state ? 1 : 0;
2502 case 1047: /* alternate screen */
2503 compatibility(OTHER);
2505 swap_screen(term, term->no_alt_screen ? 0 : state, TRUE, TRUE);
2508 case 1048: /* save/restore cursor */
2509 if (!term->no_alt_screen)
2510 save_cursor(term, state);
2511 if (!state) seen_disp_event(term);
2513 case 1049: /* cursor & alternate screen */
2514 if (state && !term->no_alt_screen)
2515 save_cursor(term, state);
2516 if (!state) seen_disp_event(term);
2517 compatibility(OTHER);
2519 swap_screen(term, term->no_alt_screen ? 0 : state, TRUE, FALSE);
2520 if (!state && !term->no_alt_screen)
2521 save_cursor(term, state);
2524 case 2004: /* xterm bracketed paste */
2525 term->bracketed_paste = state ? TRUE : FALSE;
2529 case 4: /* IRM: set insert mode */
2530 compatibility(VT102);
2531 term->insert = state;
2533 case 12: /* SRM: set echo mode */
2534 term->term_echoing = !state;
2535 if (term->ldisc) /* cause ldisc to notice changes */
2536 ldisc_send(term->ldisc, NULL, 0, 0);
2538 case 20: /* LNM: Return sends ... */
2539 term->cr_lf_return = state;
2541 case 34: /* WYULCURM: Make cursor BIG */
2542 compatibility2(OTHER, VT220);
2543 term->big_cursor = !state;
2548 * Process an OSC sequence: set window title or icon name.
2550 static void do_osc(Terminal *term)
2553 while (term->osc_strlen--)
2554 term->wordness[(unsigned char)
2555 term->osc_string[term->osc_strlen]] = term->esc_args[0];
2557 term->osc_string[term->osc_strlen] = '\0';
2558 switch (term->esc_args[0]) {
2561 if (!term->no_remote_wintitle)
2562 set_icon(term->frontend, term->osc_string);
2563 if (term->esc_args[0] == 1)
2565 /* fall through: parameter 0 means set both */
2568 if (!term->no_remote_wintitle)
2569 set_title(term->frontend, term->osc_string);
2576 * ANSI printing routines.
2578 static void term_print_setup(Terminal *term, char *printer)
2580 bufchain_clear(&term->printer_buf);
2581 term->print_job = printer_start_job(printer);
2583 static void term_print_flush(Terminal *term)
2588 while ((size = bufchain_size(&term->printer_buf)) > 5) {
2589 bufchain_prefix(&term->printer_buf, &data, &len);
2592 printer_job_data(term->print_job, data, len);
2593 bufchain_consume(&term->printer_buf, len);
2596 static void term_print_finish(Terminal *term)
2602 if (!term->printing && !term->only_printing)
2603 return; /* we need do nothing */
2605 term_print_flush(term);
2606 while ((size = bufchain_size(&term->printer_buf)) > 0) {
2607 bufchain_prefix(&term->printer_buf, &data, &len);
2609 if (c == '\033' || c == '\233') {
2610 bufchain_consume(&term->printer_buf, size);
2613 printer_job_data(term->print_job, &c, 1);
2614 bufchain_consume(&term->printer_buf, 1);
2617 printer_finish_job(term->print_job);
2618 term->print_job = NULL;
2619 term->printing = term->only_printing = FALSE;
2623 * Remove everything currently in `inbuf' and stick it up on the
2624 * in-memory display. There's a big state machine in here to
2625 * process escape sequences...
2627 static void term_out(Terminal *term)
2631 unsigned char localbuf[256], *chars;
2636 chars = NULL; /* placate compiler warnings */
2637 while (nchars > 0 || unget != -1 || bufchain_size(&term->inbuf) > 0) {
2641 bufchain_prefix(&term->inbuf, &ret, &nchars);
2642 if (nchars > sizeof(localbuf))
2643 nchars = sizeof(localbuf);
2644 memcpy(localbuf, ret, nchars);
2645 bufchain_consume(&term->inbuf, nchars);
2647 assert(chars != NULL);
2653 * Optionally log the session traffic to a file. Useful for
2654 * debugging and possibly also useful for actual logging.
2656 if (term->logtype == LGTYP_DEBUG && term->logctx)
2657 logtraffic(term->logctx, (unsigned char) c, LGTYP_DEBUG);
2663 /* Note only VT220+ are 8-bit VT102 is seven bit, it shouldn't even
2664 * be able to display 8-bit characters, but I'll let that go 'cause
2669 * If we're printing, add the character to the printer
2672 if (term->printing) {
2673 bufchain_add(&term->printer_buf, &c, 1);
2676 * If we're in print-only mode, we use a much simpler
2677 * state machine designed only to recognise the ESC[4i
2678 * termination sequence.
2680 if (term->only_printing) {
2682 term->print_state = 1;
2683 else if (c == (unsigned char)'\233')
2684 term->print_state = 2;
2685 else if (c == '[' && term->print_state == 1)
2686 term->print_state = 2;
2687 else if (c == '4' && term->print_state == 2)
2688 term->print_state = 3;
2689 else if (c == 'i' && term->print_state == 3)
2690 term->print_state = 4;
2692 term->print_state = 0;
2693 if (term->print_state == 4) {
2694 term_print_finish(term);
2700 /* First see about all those translations. */
2701 if (term->termstate == TOPLEVEL) {
2703 switch (term->utf_state) {
2706 /* UTF-8 must be stateless so we ignore iso2022. */
2707 if (term->ucsdata->unitab_ctrl[c] != 0xFF)
2708 c = term->ucsdata->unitab_ctrl[c];
2709 else c = ((unsigned char)c) | CSET_ASCII;
2711 } else if ((c & 0xe0) == 0xc0) {
2712 term->utf_size = term->utf_state = 1;
2713 term->utf_char = (c & 0x1f);
2714 } else if ((c & 0xf0) == 0xe0) {
2715 term->utf_size = term->utf_state = 2;
2716 term->utf_char = (c & 0x0f);
2717 } else if ((c & 0xf8) == 0xf0) {
2718 term->utf_size = term->utf_state = 3;
2719 term->utf_char = (c & 0x07);
2720 } else if ((c & 0xfc) == 0xf8) {
2721 term->utf_size = term->utf_state = 4;
2722 term->utf_char = (c & 0x03);
2723 } else if ((c & 0xfe) == 0xfc) {
2724 term->utf_size = term->utf_state = 5;
2725 term->utf_char = (c & 0x01);
2736 if ((c & 0xC0) != 0x80) {
2739 term->utf_state = 0;
2742 term->utf_char = (term->utf_char << 6) | (c & 0x3f);
2743 if (--term->utf_state)
2748 /* Is somebody trying to be evil! */
2750 (c < 0x800 && term->utf_size >= 2) ||
2751 (c < 0x10000 && term->utf_size >= 3) ||
2752 (c < 0x200000 && term->utf_size >= 4) ||
2753 (c < 0x4000000 && term->utf_size >= 5))
2756 /* Unicode line separator and paragraph separator are CR-LF */
2757 if (c == 0x2028 || c == 0x2029)
2760 /* High controls are probably a Baaad idea too. */
2764 /* The UTF-16 surrogates are not nice either. */
2765 /* The standard give the option of decoding these:
2766 * I don't want to! */
2767 if (c >= 0xD800 && c < 0xE000)
2770 /* ISO 10646 characters now limited to UTF-16 range. */
2774 /* This is currently a TagPhobic application.. */
2775 if (c >= 0xE0000 && c <= 0xE007F)
2778 /* U+FEFF is best seen as a null. */
2781 /* But U+FFFE is an error. */
2782 if (c == 0xFFFE || c == 0xFFFF)
2787 /* Are we in the nasty ACS mode? Note: no sco in utf mode. */
2788 else if(term->sco_acs &&
2789 (c!='\033' && c!='\012' && c!='\015' && c!='\b'))
2791 if (term->sco_acs == 2) c |= 0x80;
2794 switch (term->cset_attr[term->cset]) {
2796 * Linedraw characters are different from 'ESC ( B'
2797 * only for a small range. For ones outside that
2798 * range, make sure we use the same font as well as
2799 * the same encoding.
2802 if (term->ucsdata->unitab_ctrl[c] != 0xFF)
2803 c = term->ucsdata->unitab_ctrl[c];
2805 c = ((unsigned char) c) | CSET_LINEDRW;
2809 /* If UK-ASCII, make the '#' a LineDraw Pound */
2811 c = '}' | CSET_LINEDRW;
2814 /*FALLTHROUGH*/ case CSET_ASCII:
2815 if (term->ucsdata->unitab_ctrl[c] != 0xFF)
2816 c = term->ucsdata->unitab_ctrl[c];
2818 c = ((unsigned char) c) | CSET_ASCII;
2821 if (c>=' ') c = ((unsigned char)c) | CSET_SCOACS;
2828 * How about C1 controls?
2829 * Explicitly ignore SCI (0x9a), which we don't translate to DECID.
2831 if ((c & -32) == 0x80 && term->termstate < DO_CTRLS &&
2832 !term->vt52_mode && has_compat(VT220)) {
2836 term->termstate = SEEN_ESC;
2837 term->esc_query = FALSE;
2838 c = '@' + (c & 0x1F);
2842 /* Or the GL control. */
2843 if (c == '\177' && term->termstate < DO_CTRLS && has_compat(OTHER)) {
2844 if (term->curs.x && !term->wrapnext)
2846 term->wrapnext = FALSE;
2847 /* destructive backspace might be disabled */
2848 if (!term->no_dbackspace) {
2849 check_boundary(term, term->curs.x, term->curs.y);
2850 check_boundary(term, term->curs.x+1, term->curs.y);
2851 copy_termchar(scrlineptr(term->curs.y),
2852 term->curs.x, &term->erase_char);
2855 /* Or normal C0 controls. */
2856 if ((c & ~0x1F) == 0 && term->termstate < DO_CTRLS) {
2858 case '\005': /* ENQ: terminal type query */
2860 * Strictly speaking this is VT100 but a VT100 defaults to
2861 * no response. Other terminals respond at their option.
2863 * Don't put a CR in the default string as this tends to
2864 * upset some weird software.
2866 compatibility(ANSIMIN);
2868 lpage_send(term->ldisc, DEFAULT_CODEPAGE,
2869 term->answerback, term->answerbacklen, 0);
2872 case '\007': /* BEL: Bell */
2874 struct beeptime *newbeep;
2875 unsigned long ticks;
2877 ticks = GETTICKCOUNT();
2879 if (!term->beep_overloaded) {
2880 newbeep = snew(struct beeptime);
2881 newbeep->ticks = ticks;
2882 newbeep->next = NULL;
2883 if (!term->beephead)
2884 term->beephead = newbeep;
2886 term->beeptail->next = newbeep;
2887 term->beeptail = newbeep;
2892 * Throw out any beeps that happened more than
2895 while (term->beephead &&
2896 term->beephead->ticks < ticks - term->bellovl_t) {
2897 struct beeptime *tmp = term->beephead;
2898 term->beephead = tmp->next;
2900 if (!term->beephead)
2901 term->beeptail = NULL;
2905 if (term->bellovl && term->beep_overloaded &&
2906 ticks - term->lastbeep >= (unsigned)term->bellovl_s) {
2908 * If we're currently overloaded and the
2909 * last beep was more than s seconds ago,
2910 * leave overload mode.
2912 term->beep_overloaded = FALSE;
2913 } else if (term->bellovl && !term->beep_overloaded &&
2914 term->nbeeps >= term->bellovl_n) {
2916 * Now, if we have n or more beeps
2917 * remaining in the queue, go into overload
2920 term->beep_overloaded = TRUE;
2922 term->lastbeep = ticks;
2925 * Perform an actual beep if we're not overloaded.
2927 if (!term->bellovl || !term->beep_overloaded) {
2928 do_beep(term->frontend, term->beep);
2930 if (term->beep == BELL_VISUAL) {
2931 term_schedule_vbell(term, FALSE, 0);
2934 seen_disp_event(term);
2937 case '\b': /* BS: Back space */
2938 if (term->curs.x == 0 &&
2939 (term->curs.y == 0 || term->wrap == 0))
2941 else if (term->curs.x == 0 && term->curs.y > 0)
2942 term->curs.x = term->cols - 1, term->curs.y--;
2943 else if (term->wrapnext)
2944 term->wrapnext = FALSE;
2947 seen_disp_event(term);
2949 case '\016': /* LS1: Locking-shift one */
2950 compatibility(VT100);
2953 case '\017': /* LS0: Locking-shift zero */
2954 compatibility(VT100);
2957 case '\033': /* ESC: Escape */
2958 if (term->vt52_mode)
2959 term->termstate = VT52_ESC;
2961 compatibility(ANSIMIN);
2962 term->termstate = SEEN_ESC;
2963 term->esc_query = FALSE;
2966 case '\015': /* CR: Carriage return */
2968 term->wrapnext = FALSE;
2969 seen_disp_event(term);
2970 term->paste_hold = 0;
2972 if (term->crhaslf) {
2973 if (term->curs.y == term->marg_b)
2974 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
2975 else if (term->curs.y < term->rows - 1)
2979 logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
2981 case '\014': /* FF: Form feed */
2982 if (has_compat(SCOANSI)) {
2983 move(term, 0, 0, 0);
2984 erase_lots(term, FALSE, FALSE, TRUE);
2986 term->wrapnext = FALSE;
2987 seen_disp_event(term);
2990 case '\013': /* VT: Line tabulation */
2991 compatibility(VT100);
2992 case '\012': /* LF: Line feed */
2993 if (term->curs.y == term->marg_b)
2994 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
2995 else if (term->curs.y < term->rows - 1)
2999 term->wrapnext = FALSE;
3000 seen_disp_event(term);
3001 term->paste_hold = 0;
3003 logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
3005 case '\t': /* HT: Character tabulation */
3007 pos old_curs = term->curs;
3008 termline *ldata = scrlineptr(term->curs.y);
3012 } while (term->curs.x < term->cols - 1 &&
3013 !term->tabs[term->curs.x]);
3015 if ((ldata->lattr & LATTR_MODE) != LATTR_NORM) {
3016 if (term->curs.x >= term->cols / 2)
3017 term->curs.x = term->cols / 2 - 1;
3019 if (term->curs.x >= term->cols)
3020 term->curs.x = term->cols - 1;
3023 check_selection(term, old_curs, term->curs);
3025 seen_disp_event(term);
3029 switch (term->termstate) {
3031 /* Only graphic characters get this far;
3032 * ctrls are stripped above */
3034 termline *cline = scrlineptr(term->curs.y);
3039 width = (term->cjk_ambig_wide ?
3040 mk_wcwidth_cjk((unsigned int) c) :
3041 mk_wcwidth((unsigned int) c));
3043 if (term->wrapnext && term->wrap && width > 0) {
3044 cline->lattr |= LATTR_WRAPPED;
3045 if (term->curs.y == term->marg_b)
3046 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3047 else if (term->curs.y < term->rows - 1)
3050 term->wrapnext = FALSE;
3051 cline = scrlineptr(term->curs.y);
3053 if (term->insert && width > 0)
3055 if (term->selstate != NO_SELECTION) {
3056 pos cursplus = term->curs;
3058 check_selection(term, term->curs, cursplus);
3060 if (((c & CSET_MASK) == CSET_ASCII ||
3061 (c & CSET_MASK) == 0) &&
3063 logtraffic(term->logctx, (unsigned char) c,
3069 * If we're about to display a double-width
3070 * character starting in the rightmost
3071 * column, then we do something special
3072 * instead. We must print a space in the
3073 * last column of the screen, then wrap;
3074 * and we also set LATTR_WRAPPED2 which
3075 * instructs subsequent cut-and-pasting not
3076 * only to splice this line to the one
3077 * after it, but to ignore the space in the
3078 * last character position as well.
3079 * (Because what was actually output to the
3080 * terminal was presumably just a sequence
3081 * of CJK characters, and we don't want a
3082 * space to be pasted in the middle of
3083 * those just because they had the
3084 * misfortune to start in the wrong parity
3085 * column. xterm concurs.)
3087 check_boundary(term, term->curs.x, term->curs.y);
3088 check_boundary(term, term->curs.x+2, term->curs.y);
3089 if (term->curs.x == term->cols-1) {
3090 copy_termchar(cline, term->curs.x,
3092 cline->lattr |= LATTR_WRAPPED | LATTR_WRAPPED2;
3093 if (term->curs.y == term->marg_b)
3094 scroll(term, term->marg_t, term->marg_b,
3096 else if (term->curs.y < term->rows - 1)
3099 cline = scrlineptr(term->curs.y);
3100 /* Now we must check_boundary again, of course. */
3101 check_boundary(term, term->curs.x, term->curs.y);
3102 check_boundary(term, term->curs.x+2, term->curs.y);
3106 clear_cc(cline, term->curs.x);
3107 cline->chars[term->curs.x].chr = c;
3108 cline->chars[term->curs.x].attr = term->curr_attr;
3113 clear_cc(cline, term->curs.x);
3114 cline->chars[term->curs.x].chr = UCSWIDE;
3115 cline->chars[term->curs.x].attr = term->curr_attr;
3119 check_boundary(term, term->curs.x, term->curs.y);
3120 check_boundary(term, term->curs.x+1, term->curs.y);
3123 clear_cc(cline, term->curs.x);
3124 cline->chars[term->curs.x].chr = c;
3125 cline->chars[term->curs.x].attr = term->curr_attr;
3129 if (term->curs.x > 0) {
3130 int x = term->curs.x - 1;
3132 /* If we're in wrapnext state, the character
3133 * to combine with is _here_, not to our left. */
3138 * If the previous character is
3139 * UCSWIDE, back up another one.
3141 if (cline->chars[x].chr == UCSWIDE) {
3146 add_cc(cline, x, c);
3147 seen_disp_event(term);
3154 if (term->curs.x == term->cols) {
3156 term->wrapnext = TRUE;
3157 if (term->wrap && term->vt52_mode) {
3158 cline->lattr |= LATTR_WRAPPED;
3159 if (term->curs.y == term->marg_b)
3160 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3161 else if (term->curs.y < term->rows - 1)
3164 term->wrapnext = FALSE;
3167 seen_disp_event(term);
3173 * This state is virtually identical to SEEN_ESC, with the
3174 * exception that we have an OSC sequence in the pipeline,
3175 * and _if_ we see a backslash, we process it.
3179 term->termstate = TOPLEVEL;
3182 /* else fall through */
3184 if (c >= ' ' && c <= '/') {
3185 if (term->esc_query)
3186 term->esc_query = -1;
3188 term->esc_query = c;
3191 term->termstate = TOPLEVEL;
3192 switch (ANSI(c, term->esc_query)) {
3193 case '[': /* enter CSI mode */
3194 term->termstate = SEEN_CSI;
3195 term->esc_nargs = 1;
3196 term->esc_args[0] = ARG_DEFAULT;
3197 term->esc_query = FALSE;
3199 case ']': /* OSC: xterm escape sequences */
3200 /* Compatibility is nasty here, xterm, linux, decterm yuk! */
3201 compatibility(OTHER);
3202 term->termstate = SEEN_OSC;
3203 term->esc_args[0] = 0;
3205 case '7': /* DECSC: save cursor */
3206 compatibility(VT100);
3207 save_cursor(term, TRUE);
3209 case '8': /* DECRC: restore cursor */
3210 compatibility(VT100);
3211 save_cursor(term, FALSE);
3212 seen_disp_event(term);
3214 case '=': /* DECKPAM: Keypad application mode */
3215 compatibility(VT100);
3216 term->app_keypad_keys = TRUE;
3218 case '>': /* DECKPNM: Keypad numeric mode */
3219 compatibility(VT100);
3220 term->app_keypad_keys = FALSE;
3222 case 'D': /* IND: exactly equivalent to LF */
3223 compatibility(VT100);
3224 if (term->curs.y == term->marg_b)
3225 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3226 else if (term->curs.y < term->rows - 1)
3228 term->wrapnext = FALSE;
3229 seen_disp_event(term);
3231 case 'E': /* NEL: exactly equivalent to CR-LF */
3232 compatibility(VT100);
3234 if (term->curs.y == term->marg_b)
3235 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3236 else if (term->curs.y < term->rows - 1)
3238 term->wrapnext = FALSE;
3239 seen_disp_event(term);
3241 case 'M': /* RI: reverse index - backwards LF */
3242 compatibility(VT100);
3243 if (term->curs.y == term->marg_t)
3244 scroll(term, term->marg_t, term->marg_b, -1, TRUE);
3245 else if (term->curs.y > 0)
3247 term->wrapnext = FALSE;
3248 seen_disp_event(term);
3250 case 'Z': /* DECID: terminal type query */
3251 compatibility(VT100);
3253 ldisc_send(term->ldisc, term->id_string,
3254 strlen(term->id_string), 0);
3256 case 'c': /* RIS: restore power-on settings */
3257 compatibility(VT100);
3258 power_on(term, TRUE);
3259 if (term->ldisc) /* cause ldisc to notice changes */
3260 ldisc_send(term->ldisc, NULL, 0, 0);
3261 if (term->reset_132) {
3262 if (!term->no_remote_resize)
3263 request_resize(term->frontend, 80, term->rows);
3264 term->reset_132 = 0;
3267 seen_disp_event(term);
3269 case 'H': /* HTS: set a tab */
3270 compatibility(VT100);
3271 term->tabs[term->curs.x] = TRUE;
3274 case ANSI('8', '#'): /* DECALN: fills screen with Es :-) */
3275 compatibility(VT100);
3281 for (i = 0; i < term->rows; i++) {
3282 ldata = scrlineptr(i);
3283 for (j = 0; j < term->cols; j++) {
3284 copy_termchar(ldata, j,
3285 &term->basic_erase_char);
3286 ldata->chars[j].chr = 'E';
3288 ldata->lattr = LATTR_NORM;
3291 seen_disp_event(term);
3292 scrtop.x = scrtop.y = 0;
3294 scrbot.y = term->rows;
3295 check_selection(term, scrtop, scrbot);
3299 case ANSI('3', '#'):
3300 case ANSI('4', '#'):
3301 case ANSI('5', '#'):
3302 case ANSI('6', '#'):
3303 compatibility(VT100);
3307 switch (ANSI(c, term->esc_query)) {
3308 case ANSI('3', '#'): /* DECDHL: 2*height, top */
3311 case ANSI('4', '#'): /* DECDHL: 2*height, bottom */
3314 case ANSI('5', '#'): /* DECSWL: normal */
3315 nlattr = LATTR_NORM;
3317 default: /* case ANSI('6', '#'): DECDWL: 2*width */
3318 nlattr = LATTR_WIDE;
3321 scrlineptr(term->curs.y)->lattr = nlattr;
3324 /* GZD4: G0 designate 94-set */
3325 case ANSI('A', '('):
3326 compatibility(VT100);
3327 if (!term->no_remote_charset)
3328 term->cset_attr[0] = CSET_GBCHR;
3330 case ANSI('B', '('):
3331 compatibility(VT100);
3332 if (!term->no_remote_charset)
3333 term->cset_attr[0] = CSET_ASCII;
3335 case ANSI('0', '('):
3336 compatibility(VT100);
3337 if (!term->no_remote_charset)
3338 term->cset_attr[0] = CSET_LINEDRW;
3340 case ANSI('U', '('):
3341 compatibility(OTHER);
3342 if (!term->no_remote_charset)
3343 term->cset_attr[0] = CSET_SCOACS;
3345 /* G1D4: G1-designate 94-set */
3346 case ANSI('A', ')'):
3347 compatibility(VT100);
3348 if (!term->no_remote_charset)
3349 term->cset_attr[1] = CSET_GBCHR;
3351 case ANSI('B', ')'):
3352 compatibility(VT100);
3353 if (!term->no_remote_charset)
3354 term->cset_attr[1] = CSET_ASCII;
3356 case ANSI('0', ')'):
3357 compatibility(VT100);
3358 if (!term->no_remote_charset)
3359 term->cset_attr[1] = CSET_LINEDRW;
3361 case ANSI('U', ')'):
3362 compatibility(OTHER);
3363 if (!term->no_remote_charset)
3364 term->cset_attr[1] = CSET_SCOACS;
3366 /* DOCS: Designate other coding system */
3367 case ANSI('8', '%'): /* Old Linux code */
3368 case ANSI('G', '%'):
3369 compatibility(OTHER);
3370 if (!term->no_remote_charset)
3373 case ANSI('@', '%'):
3374 compatibility(OTHER);
3375 if (!term->no_remote_charset)
3381 term->termstate = TOPLEVEL; /* default */
3383 if (term->esc_nargs <= ARGS_MAX) {
3384 if (term->esc_args[term->esc_nargs - 1] == ARG_DEFAULT)
3385 term->esc_args[term->esc_nargs - 1] = 0;
3386 term->esc_args[term->esc_nargs - 1] =
3387 10 * term->esc_args[term->esc_nargs - 1] + c - '0';
3389 term->termstate = SEEN_CSI;
3390 } else if (c == ';') {
3391 if (term->esc_nargs < ARGS_MAX)
3392 term->esc_args[term->esc_nargs++] = ARG_DEFAULT;
3393 term->termstate = SEEN_CSI;
3394 } else if (c < '@') {
3395 if (term->esc_query)
3396 term->esc_query = -1;
3398 term->esc_query = TRUE;
3400 term->esc_query = c;
3401 term->termstate = SEEN_CSI;
3403 switch (ANSI(c, term->esc_query)) {
3404 case 'A': /* CUU: move up N lines */
3405 move(term, term->curs.x,
3406 term->curs.y - def(term->esc_args[0], 1), 1);
3407 seen_disp_event(term);
3409 case 'e': /* VPR: move down N lines */
3410 compatibility(ANSI);
3412 case 'B': /* CUD: Cursor down */
3413 move(term, term->curs.x,
3414 term->curs.y + def(term->esc_args[0], 1), 1);
3415 seen_disp_event(term);
3417 case ANSI('c', '>'): /* DA: report xterm version */
3418 compatibility(OTHER);
3419 /* this reports xterm version 136 so that VIM can
3420 use the drag messages from the mouse reporting */
3422 ldisc_send(term->ldisc, "\033[>0;136;0c", 11, 0);
3424 case 'a': /* HPR: move right N cols */
3425 compatibility(ANSI);
3427 case 'C': /* CUF: Cursor right */
3428 move(term, term->curs.x + def(term->esc_args[0], 1),
3430 seen_disp_event(term);
3432 case 'D': /* CUB: move left N cols */
3433 move(term, term->curs.x - def(term->esc_args[0], 1),
3435 seen_disp_event(term);
3437 case 'E': /* CNL: move down N lines and CR */
3438 compatibility(ANSI);
3440 term->curs.y + def(term->esc_args[0], 1), 1);
3441 seen_disp_event(term);
3443 case 'F': /* CPL: move up N lines and CR */
3444 compatibility(ANSI);
3446 term->curs.y - def(term->esc_args[0], 1), 1);
3447 seen_disp_event(term);
3450 case '`': /* HPA: set horizontal posn */
3451 compatibility(ANSI);
3452 move(term, def(term->esc_args[0], 1) - 1,
3454 seen_disp_event(term);
3456 case 'd': /* VPA: set vertical posn */
3457 compatibility(ANSI);
3458 move(term, term->curs.x,
3459 ((term->dec_om ? term->marg_t : 0) +
3460 def(term->esc_args[0], 1) - 1),
3461 (term->dec_om ? 2 : 0));
3462 seen_disp_event(term);
3465 case 'f': /* HVP: set horz and vert posns at once */
3466 if (term->esc_nargs < 2)
3467 term->esc_args[1] = ARG_DEFAULT;
3468 move(term, def(term->esc_args[1], 1) - 1,
3469 ((term->dec_om ? term->marg_t : 0) +
3470 def(term->esc_args[0], 1) - 1),
3471 (term->dec_om ? 2 : 0));
3472 seen_disp_event(term);
3474 case 'J': /* ED: erase screen or parts of it */
3476 unsigned int i = def(term->esc_args[0], 0);
3478 /* Erase Saved Lines (xterm)
3479 * This follows Thomas Dickey's xterm. */
3485 erase_lots(term, FALSE, !!(i & 2), !!(i & 1));
3489 seen_disp_event(term);
3491 case 'K': /* EL: erase line or parts of it */
3493 unsigned int i = def(term->esc_args[0], 0) + 1;
3496 erase_lots(term, TRUE, !!(i & 2), !!(i & 1));
3498 seen_disp_event(term);
3500 case 'L': /* IL: insert lines */
3501 compatibility(VT102);
3502 if (term->curs.y <= term->marg_b)
3503 scroll(term, term->curs.y, term->marg_b,
3504 -def(term->esc_args[0], 1), FALSE);
3505 seen_disp_event(term);
3507 case 'M': /* DL: delete lines */
3508 compatibility(VT102);
3509 if (term->curs.y <= term->marg_b)
3510 scroll(term, term->curs.y, term->marg_b,
3511 def(term->esc_args[0], 1),
3513 seen_disp_event(term);
3515 case '@': /* ICH: insert chars */
3516 /* XXX VTTEST says this is vt220, vt510 manual says vt102 */
3517 compatibility(VT102);
3518 insch(term, def(term->esc_args[0], 1));
3519 seen_disp_event(term);
3521 case 'P': /* DCH: delete chars */
3522 compatibility(VT102);
3523 insch(term, -def(term->esc_args[0], 1));
3524 seen_disp_event(term);
3526 case 'c': /* DA: terminal type query */
3527 compatibility(VT100);
3528 /* This is the response for a VT102 */
3530 ldisc_send(term->ldisc, term->id_string,
3531 strlen(term->id_string), 0);
3533 case 'n': /* DSR: cursor position query */
3535 if (term->esc_args[0] == 6) {
3537 sprintf(buf, "\033[%d;%dR", term->curs.y + 1,
3539 ldisc_send(term->ldisc, buf, strlen(buf), 0);
3540 } else if (term->esc_args[0] == 5) {
3541 ldisc_send(term->ldisc, "\033[0n", 4, 0);
3545 case 'h': /* SM: toggle modes to high */
3547 compatibility(VT100);
3550 for (i = 0; i < term->esc_nargs; i++)
3551 toggle_mode(term, term->esc_args[i],
3552 term->esc_query, TRUE);
3555 case 'i': /* MC: Media copy */
3557 compatibility(VT100);
3560 if (term->esc_nargs != 1) break;
3561 if (term->esc_args[0] == 5 &&
3562 (printer = conf_get_str(term->conf,
3563 CONF_printer))[0]) {
3564 term->printing = TRUE;
3565 term->only_printing = !term->esc_query;
3566 term->print_state = 0;
3567 term_print_setup(term, printer);
3568 } else if (term->esc_args[0] == 4 &&
3570 term_print_finish(term);
3574 case 'l': /* RM: toggle modes to low */
3576 compatibility(VT100);
3579 for (i = 0; i < term->esc_nargs; i++)
3580 toggle_mode(term, term->esc_args[i],
3581 term->esc_query, FALSE);
3584 case 'g': /* TBC: clear tabs */
3585 compatibility(VT100);
3586 if (term->esc_nargs == 1) {
3587 if (term->esc_args[0] == 0) {
3588 term->tabs[term->curs.x] = FALSE;
3589 } else if (term->esc_args[0] == 3) {
3591 for (i = 0; i < term->cols; i++)
3592 term->tabs[i] = FALSE;
3596 case 'r': /* DECSTBM: set scroll margins */
3597 compatibility(VT100);
3598 if (term->esc_nargs <= 2) {
3600 top = def(term->esc_args[0], 1) - 1;
3601 bot = (term->esc_nargs <= 1
3602 || term->esc_args[1] == 0 ?
3604 def(term->esc_args[1], term->rows)) - 1;
3605 if (bot >= term->rows)
3606 bot = term->rows - 1;
3607 /* VTTEST Bug 9 - if region is less than 2 lines
3608 * don't change region.
3610 if (bot - top > 0) {
3615 * I used to think the cursor should be
3616 * placed at the top of the newly marginned
3617 * area. Apparently not: VMS TPU falls over
3620 * Well actually it should for
3623 term->curs.y = (term->dec_om ?
3625 seen_disp_event(term);
3629 case 'm': /* SGR: set graphics rendition */
3632 * A VT100 without the AVO only had one
3633 * attribute, either underline or
3634 * reverse video depending on the
3635 * cursor type, this was selected by
3639 * This is sometimes DIM, eg on the
3642 * This is sometimes INVIS various ANSI.
3644 * This like 22 disables BOLD, DIM and INVIS
3646 * The ANSI colours appear on any
3647 * terminal that has colour (obviously)
3648 * but the interaction between sgr0 and
3649 * the colours varies but is usually
3650 * related to the background colour
3651 * erase item. The interaction between
3652 * colour attributes and the mono ones
3653 * is also very implementation
3656 * The 39 and 49 attributes are likely
3657 * to be unimplemented.
3660 for (i = 0; i < term->esc_nargs; i++) {
3661 switch (def(term->esc_args[i], 0)) {
3662 case 0: /* restore defaults */
3663 term->curr_attr = term->default_attr;
3665 case 1: /* enable bold */
3666 compatibility(VT100AVO);
3667 term->curr_attr |= ATTR_BOLD;
3669 case 21: /* (enable double underline) */
3670 compatibility(OTHER);
3671 case 4: /* enable underline */
3672 compatibility(VT100AVO);
3673 term->curr_attr |= ATTR_UNDER;
3675 case 5: /* enable blink */
3676 compatibility(VT100AVO);
3677 term->curr_attr |= ATTR_BLINK;
3679 case 6: /* SCO light bkgrd */
3680 compatibility(SCOANSI);
3681 term->blink_is_real = FALSE;
3682 term->curr_attr |= ATTR_BLINK;
3683 term_schedule_tblink(term);
3685 case 7: /* enable reverse video */
3686 term->curr_attr |= ATTR_REVERSE;
3688 case 10: /* SCO acs off */
3689 compatibility(SCOANSI);
3690 if (term->no_remote_charset) break;
3691 term->sco_acs = 0; break;
3692 case 11: /* SCO acs on */
3693 compatibility(SCOANSI);
3694 if (term->no_remote_charset) break;
3695 term->sco_acs = 1; break;
3696 case 12: /* SCO acs on, |0x80 */
3697 compatibility(SCOANSI);
3698 if (term->no_remote_charset) break;
3699 term->sco_acs = 2; break;
3700 case 22: /* disable bold */
3701 compatibility2(OTHER, VT220);
3702 term->curr_attr &= ~ATTR_BOLD;
3704 case 24: /* disable underline */
3705 compatibility2(OTHER, VT220);
3706 term->curr_attr &= ~ATTR_UNDER;
3708 case 25: /* disable blink */
3709 compatibility2(OTHER, VT220);
3710 term->curr_attr &= ~ATTR_BLINK;
3712 case 27: /* disable reverse video */
3713 compatibility2(OTHER, VT220);
3714 term->curr_attr &= ~ATTR_REVERSE;
3725 term->curr_attr &= ~ATTR_FGMASK;
3727 (term->esc_args[i] - 30)<<ATTR_FGSHIFT;
3737 /* aixterm-style bright foreground */
3738 term->curr_attr &= ~ATTR_FGMASK;
3740 ((term->esc_args[i] - 90 + 8)
3743 case 39: /* default-foreground */
3744 term->curr_attr &= ~ATTR_FGMASK;
3745 term->curr_attr |= ATTR_DEFFG;
3756 term->curr_attr &= ~ATTR_BGMASK;
3758 (term->esc_args[i] - 40)<<ATTR_BGSHIFT;
3768 /* aixterm-style bright background */
3769 term->curr_attr &= ~ATTR_BGMASK;
3771 ((term->esc_args[i] - 100 + 8)
3774 case 49: /* default-background */
3775 term->curr_attr &= ~ATTR_BGMASK;
3776 term->curr_attr |= ATTR_DEFBG;
3778 case 38: /* xterm 256-colour mode */
3779 if (i+2 < term->esc_nargs &&
3780 term->esc_args[i+1] == 5) {
3781 term->curr_attr &= ~ATTR_FGMASK;
3783 ((term->esc_args[i+2] & 0xFF)
3788 case 48: /* xterm 256-colour mode */
3789 if (i+2 < term->esc_nargs &&
3790 term->esc_args[i+1] == 5) {
3791 term->curr_attr &= ~ATTR_BGMASK;
3793 ((term->esc_args[i+2] & 0xFF)
3800 set_erase_char(term);
3803 case 's': /* save cursor */
3804 save_cursor(term, TRUE);
3806 case 'u': /* restore cursor */
3807 save_cursor(term, FALSE);
3808 seen_disp_event(term);
3810 case 't': /* DECSLPP: set page size - ie window height */
3812 * VT340/VT420 sequence DECSLPP, DEC only allows values
3813 * 24/25/36/48/72/144 other emulators (eg dtterm) use
3814 * illegal values (eg first arg 1..9) for window changing
3817 if (term->esc_nargs <= 1
3818 && (term->esc_args[0] < 1 ||
3819 term->esc_args[0] >= 24)) {
3820 compatibility(VT340TEXT);
3821 if (!term->no_remote_resize)
3822 request_resize(term->frontend, term->cols,
3823 def(term->esc_args[0], 24));
3825 } else if (term->esc_nargs >= 1 &&
3826 term->esc_args[0] >= 1 &&
3827 term->esc_args[0] < 24) {
3828 compatibility(OTHER);
3830 switch (term->esc_args[0]) {
3834 set_iconic(term->frontend, FALSE);
3837 set_iconic(term->frontend, TRUE);
3840 if (term->esc_nargs >= 3) {
3841 if (!term->no_remote_resize)
3842 move_window(term->frontend,
3843 def(term->esc_args[1], 0),
3844 def(term->esc_args[2], 0));
3848 /* We should resize the window to a given
3849 * size in pixels here, but currently our
3850 * resizing code isn't healthy enough to
3855 set_zorder(term->frontend, TRUE);
3858 /* move to bottom */
3859 set_zorder(term->frontend, FALSE);
3862 refresh_window(term->frontend);
3865 if (term->esc_nargs >= 3) {
3866 if (!term->no_remote_resize)
3867 request_resize(term->frontend,
3868 def(term->esc_args[2], term->conf_width),
3869 def(term->esc_args[1], term->conf_height));
3873 if (term->esc_nargs >= 2)
3874 set_zoomed(term->frontend,
3880 ldisc_send(term->ldisc,
3881 is_iconic(term->frontend) ?
3882 "\033[2t" : "\033[1t", 4, 0);
3886 get_window_pos(term->frontend, &x, &y);
3887 len = sprintf(buf, "\033[3;%d;%dt", x, y);
3888 ldisc_send(term->ldisc, buf, len, 0);
3893 get_window_pixels(term->frontend, &x, &y);
3894 len = sprintf(buf, "\033[4;%d;%dt", y, x);
3895 ldisc_send(term->ldisc, buf, len, 0);
3900 len = sprintf(buf, "\033[8;%d;%dt",
3901 term->rows, term->cols);
3902 ldisc_send(term->ldisc, buf, len, 0);
3907 * Hmmm. Strictly speaking we
3908 * should return `the size of the
3909 * screen in characters', but
3910 * that's not easy: (a) window
3911 * furniture being what it is it's
3912 * hard to compute, and (b) in
3913 * resize-font mode maximising the
3914 * window wouldn't change the
3915 * number of characters. *shrug*. I
3916 * think we'll ignore it for the
3917 * moment and see if anyone
3918 * complains, and then ask them
3919 * what they would like it to do.
3924 term->remote_qtitle_action != TITLE_NONE) {
3925 if(term->remote_qtitle_action == TITLE_REAL)
3926 p = get_window_title(term->frontend, TRUE);
3928 p = EMPTY_WINDOW_TITLE;
3930 ldisc_send(term->ldisc, "\033]L", 3, 0);
3931 ldisc_send(term->ldisc, p, len, 0);
3932 ldisc_send(term->ldisc, "\033\\", 2, 0);
3937 term->remote_qtitle_action != TITLE_NONE) {
3938 if(term->remote_qtitle_action == TITLE_REAL)
3939 p = get_window_title(term->frontend, FALSE);
3941 p = EMPTY_WINDOW_TITLE;
3943 ldisc_send(term->ldisc, "\033]l", 3, 0);
3944 ldisc_send(term->ldisc, p, len, 0);
3945 ldisc_send(term->ldisc, "\033\\", 2, 0);
3951 case 'S': /* SU: Scroll up */
3952 compatibility(SCOANSI);
3953 scroll(term, term->marg_t, term->marg_b,
3954 def(term->esc_args[0], 1), TRUE);
3955 term->wrapnext = FALSE;
3956 seen_disp_event(term);
3958 case 'T': /* SD: Scroll down */
3959 compatibility(SCOANSI);
3960 scroll(term, term->marg_t, term->marg_b,
3961 -def(term->esc_args[0], 1), TRUE);
3962 term->wrapnext = FALSE;
3963 seen_disp_event(term);
3965 case ANSI('|', '*'): /* DECSNLS */
3967 * Set number of lines on screen
3968 * VT420 uses VGA like hardware and can
3969 * support any size in reasonable range
3970 * (24..49 AIUI) with no default specified.
3972 compatibility(VT420);
3973 if (term->esc_nargs == 1 && term->esc_args[0] > 0) {
3974 if (!term->no_remote_resize)
3975 request_resize(term->frontend, term->cols,
3976 def(term->esc_args[0],
3977 term->conf_height));
3981 case ANSI('|', '$'): /* DECSCPP */
3983 * Set number of columns per page
3984 * Docs imply range is only 80 or 132, but
3987 compatibility(VT340TEXT);
3988 if (term->esc_nargs <= 1) {
3989 if (!term->no_remote_resize)
3990 request_resize(term->frontend,
3991 def(term->esc_args[0],
3997 case 'X': /* ECH: write N spaces w/o moving cursor */
3998 /* XXX VTTEST says this is vt220, vt510 manual
4000 compatibility(ANSIMIN);
4002 int n = def(term->esc_args[0], 1);
4004 int p = term->curs.x;
4005 termline *cline = scrlineptr(term->curs.y);
4007 if (n > term->cols - term->curs.x)
4008 n = term->cols - term->curs.x;
4009 cursplus = term->curs;
4011 check_boundary(term, term->curs.x, term->curs.y);
4012 check_boundary(term, term->curs.x+n, term->curs.y);
4013 check_selection(term, term->curs, cursplus);
4015 copy_termchar(cline, p++,
4017 seen_disp_event(term);
4020 case 'x': /* DECREQTPARM: report terminal characteristics */
4021 compatibility(VT100);
4024 int i = def(term->esc_args[0], 0);
4025 if (i == 0 || i == 1) {
4026 strcpy(buf, "\033[2;1;1;112;112;1;0x");
4028 ldisc_send(term->ldisc, buf, 20, 0);
4033 compatibility(OTHER);
4035 int i = def(term->esc_args[0], 1);
4036 pos old_curs = term->curs;
4038 for(;i>0 && term->curs.x>0; i--) {
4041 } while (term->curs.x >0 &&
4042 !term->tabs[term->curs.x]);
4044 check_selection(term, old_curs, term->curs);
4047 case ANSI('c', '='): /* Hide or Show Cursor */
4048 compatibility(SCOANSI);
4049 switch(term->esc_args[0]) {
4050 case 0: /* hide cursor */
4051 term->cursor_on = FALSE;
4053 case 1: /* restore cursor */
4054 term->big_cursor = FALSE;
4055 term->cursor_on = TRUE;
4057 case 2: /* block cursor */
4058 term->big_cursor = TRUE;
4059 term->cursor_on = TRUE;
4063 case ANSI('C', '='):
4065 * set cursor start on scanline esc_args[0] and
4066 * end on scanline esc_args[1].If you set
4067 * the bottom scan line to a value less than
4068 * the top scan line, the cursor will disappear.
4070 compatibility(SCOANSI);
4071 if (term->esc_nargs >= 2) {
4072 if (term->esc_args[0] > term->esc_args[1])
4073 term->cursor_on = FALSE;
4075 term->cursor_on = TRUE;
4078 case ANSI('D', '='):
4079 compatibility(SCOANSI);
4080 term->blink_is_real = FALSE;
4081 term_schedule_tblink(term);
4082 if (term->esc_args[0]>=1)
4083 term->curr_attr |= ATTR_BLINK;
4085 term->curr_attr &= ~ATTR_BLINK;
4087 case ANSI('E', '='):
4088 compatibility(SCOANSI);
4089 term->blink_is_real = (term->esc_args[0] >= 1);
4090 term_schedule_tblink(term);
4092 case ANSI('F', '='): /* set normal foreground */
4093 compatibility(SCOANSI);
4094 if (term->esc_args[0] >= 0 && term->esc_args[0] < 16) {
4096 (sco2ansicolour[term->esc_args[0] & 0x7] |
4097 (term->esc_args[0] & 0x8)) <<
4099 term->curr_attr &= ~ATTR_FGMASK;
4100 term->curr_attr |= colour;
4101 term->default_attr &= ~ATTR_FGMASK;
4102 term->default_attr |= colour;
4103 set_erase_char(term);
4106 case ANSI('G', '='): /* set normal background */
4107 compatibility(SCOANSI);
4108 if (term->esc_args[0] >= 0 && term->esc_args[0] < 16) {
4110 (sco2ansicolour[term->esc_args[0] & 0x7] |
4111 (term->esc_args[0] & 0x8)) <<
4113 term->curr_attr &= ~ATTR_BGMASK;
4114 term->curr_attr |= colour;
4115 term->default_attr &= ~ATTR_BGMASK;
4116 term->default_attr |= colour;
4117 set_erase_char(term);
4120 case ANSI('L', '='):
4121 compatibility(SCOANSI);
4122 term->use_bce = (term->esc_args[0] <= 0);
4123 set_erase_char(term);
4125 case ANSI('p', '"'): /* DECSCL: set compat level */
4127 * Allow the host to make this emulator a
4128 * 'perfect' VT102. This first appeared in
4129 * the VT220, but we do need to get back to
4130 * PuTTY mode so I won't check it.
4132 * The arg in 40..42,50 are a PuTTY extension.
4133 * The 2nd arg, 8bit vs 7bit is not checked.
4135 * Setting VT102 mode should also change
4136 * the Fkeys to generate PF* codes as a
4137 * real VT102 has no Fkeys. The VT220 does
4138 * this, F11..F13 become ESC,BS,LF other
4139 * Fkeys send nothing.
4141 * Note ESC c will NOT change this!
4144 switch (term->esc_args[0]) {
4146 term->compatibility_level &= ~TM_VTXXX;
4147 term->compatibility_level |= TM_VT102;
4150 term->compatibility_level &= ~TM_VTXXX;
4151 term->compatibility_level |= TM_VT220;
4155 if (term->esc_args[0] > 60 &&
4156 term->esc_args[0] < 70)
4157 term->compatibility_level |= TM_VTXXX;
4161 term->compatibility_level &= TM_VTXXX;
4164 term->compatibility_level = TM_PUTTY;
4167 term->compatibility_level = TM_SCOANSI;
4171 term->compatibility_level = TM_PUTTY;
4177 /* Change the response to CSI c */
4178 if (term->esc_args[0] == 50) {
4181 strcpy(term->id_string, "\033[?");
4182 for (i = 1; i < term->esc_nargs; i++) {
4184 strcat(term->id_string, ";");
4185 sprintf(lbuf, "%d", term->esc_args[i]);
4186 strcat(term->id_string, lbuf);
4188 strcat(term->id_string, "c");
4191 /* Is this a good idea ?
4192 * Well we should do a soft reset at this point ...
4194 if (!has_compat(VT420) && has_compat(VT100)) {
4195 if (!term->no_remote_resize) {
4196 if (term->reset_132)
4197 request_resize(132, 24);
4199 request_resize(80, 24);
4207 term->osc_w = FALSE;
4209 case 'P': /* Linux palette sequence */
4210 term->termstate = SEEN_OSC_P;
4211 term->osc_strlen = 0;
4213 case 'R': /* Linux palette reset */
4214 palette_reset(term->frontend);
4215 term_invalidate(term);
4216 term->termstate = TOPLEVEL;
4218 case 'W': /* word-set */
4219 term->termstate = SEEN_OSC_W;
4232 term->esc_args[0] = 10 * term->esc_args[0] + c - '0';
4236 * Grotty hack to support xterm and DECterm title
4237 * sequences concurrently.
4239 if (term->esc_args[0] == 2) {
4240 term->esc_args[0] = 1;
4243 /* else fall through */
4245 term->termstate = OSC_STRING;
4246 term->osc_strlen = 0;
4251 * This OSC stuff is EVIL. It takes just one character to get into
4252 * sysline mode and it's not initially obvious how to get out.
4253 * So I've added CR and LF as string aborts.
4254 * This shouldn't effect compatibility as I believe embedded
4255 * control characters are supposed to be interpreted (maybe?)
4256 * and they don't display anything useful anyway.
4260 if (c == '\012' || c == '\015') {
4261 term->termstate = TOPLEVEL;
4262 } else if (c == 0234 || c == '\007') {
4264 * These characters terminate the string; ST and BEL
4265 * terminate the sequence and trigger instant
4266 * processing of it, whereas ESC goes back to SEEN_ESC
4267 * mode unless it is followed by \, in which case it is
4268 * synonymous with ST in the first place.
4271 term->termstate = TOPLEVEL;
4272 } else if (c == '\033')
4273 term->termstate = OSC_MAYBE_ST;
4274 else if (term->osc_strlen < OSC_STR_MAX)
4275 term->osc_string[term->osc_strlen++] = (char)c;
4279 int max = (term->osc_strlen == 0 ? 21 : 15);
4281 if ((int)c >= '0' && (int)c <= '9')
4283 else if ((int)c >= 'A' && (int)c <= 'A' + max - 10)
4285 else if ((int)c >= 'a' && (int)c <= 'a' + max - 10)
4288 term->termstate = TOPLEVEL;
4291 term->osc_string[term->osc_strlen++] = val;
4292 if (term->osc_strlen >= 7) {
4293 palette_set(term->frontend, term->osc_string[0],
4294 term->osc_string[1] * 16 + term->osc_string[2],
4295 term->osc_string[3] * 16 + term->osc_string[4],
4296 term->osc_string[5] * 16 + term->osc_string[6]);
4297 term_invalidate(term);
4298 term->termstate = TOPLEVEL;
4314 term->esc_args[0] = 10 * term->esc_args[0] + c - '0';
4317 term->termstate = OSC_STRING;
4318 term->osc_strlen = 0;
4322 term->termstate = TOPLEVEL;
4323 seen_disp_event(term);
4326 move(term, term->curs.x, term->curs.y - 1, 1);
4329 move(term, term->curs.x, term->curs.y + 1, 1);
4332 move(term, term->curs.x + 1, term->curs.y, 1);
4335 move(term, term->curs.x - 1, term->curs.y, 1);
4338 * From the VT100 Manual
4339 * NOTE: The special graphics characters in the VT100
4340 * are different from those in the VT52
4342 * From VT102 manual:
4343 * 137 _ Blank - Same
4344 * 140 ` Reserved - Humm.
4345 * 141 a Solid rectangle - Similar
4346 * 142 b 1/ - Top half of fraction for the
4347 * 143 c 3/ - subscript numbers below.
4350 * 146 f Degrees - Same
4351 * 147 g Plus or minus - Same
4353 * 151 i Ellipsis (dots)
4356 * 154 l Bar at scan 0
4357 * 155 m Bar at scan 1
4358 * 156 n Bar at scan 2
4359 * 157 o Bar at scan 3 - Similar
4360 * 160 p Bar at scan 4 - Similar
4361 * 161 q Bar at scan 5 - Similar
4362 * 162 r Bar at scan 6 - Same
4363 * 163 s Bar at scan 7 - Similar
4378 term->cset_attr[term->cset = 0] = CSET_LINEDRW;
4381 term->cset_attr[term->cset = 0] = CSET_ASCII;
4384 move(term, 0, 0, 0);
4387 if (term->curs.y == 0)
4388 scroll(term, 0, term->rows - 1, -1, TRUE);
4389 else if (term->curs.y > 0)
4391 term->wrapnext = FALSE;
4394 erase_lots(term, FALSE, FALSE, TRUE);
4398 erase_lots(term, TRUE, FALSE, TRUE);
4402 /* XXX Print cursor line */
4405 /* XXX Start controller mode */
4408 /* XXX Stop controller mode */
4412 term->termstate = VT52_Y1;
4416 ldisc_send(term->ldisc, "\033/Z", 3, 0);
4419 term->app_keypad_keys = TRUE;
4422 term->app_keypad_keys = FALSE;
4425 /* XXX This should switch to VT100 mode not current or default
4426 * VT mode. But this will only have effect in a VT220+
4429 term->vt52_mode = FALSE;
4430 term->blink_is_real = term->blinktext;
4431 term_schedule_tblink(term);
4435 /* XXX Enter auto print mode */
4438 /* XXX Exit auto print mode */
4441 /* XXX Print screen */
4447 /* compatibility(ATARI) */
4448 move(term, 0, 0, 0);
4449 erase_lots(term, FALSE, FALSE, TRUE);
4453 /* compatibility(ATARI) */
4454 if (term->curs.y <= term->marg_b)
4455 scroll(term, term->curs.y, term->marg_b, -1, FALSE);
4458 /* compatibility(ATARI) */
4459 if (term->curs.y <= term->marg_b)
4460 scroll(term, term->curs.y, term->marg_b, 1, TRUE);
4463 /* compatibility(ATARI) */
4464 term->termstate = VT52_FG;
4467 /* compatibility(ATARI) */
4468 term->termstate = VT52_BG;
4471 /* compatibility(ATARI) */
4472 erase_lots(term, FALSE, TRUE, FALSE);
4476 /* compatibility(ATARI) */
4477 term->cursor_on = TRUE;
4480 /* compatibility(ATARI) */
4481 term->cursor_on = FALSE;
4483 /* case 'j': Save cursor position - broken on ST */
4484 /* case 'k': Restore cursor position */
4486 /* compatibility(ATARI) */
4487 erase_lots(term, TRUE, TRUE, TRUE);
4489 term->wrapnext = FALSE;
4492 /* compatibility(ATARI) */
4493 erase_lots(term, TRUE, TRUE, FALSE);
4496 /* compatibility(ATARI) */
4497 term->curr_attr |= ATTR_REVERSE;
4500 /* compatibility(ATARI) */
4501 term->curr_attr &= ~ATTR_REVERSE;
4503 case 'v': /* wrap Autowrap on - Wyse style */
4504 /* compatibility(ATARI) */
4507 case 'w': /* Autowrap off */
4508 /* compatibility(ATARI) */
4513 /* compatibility(OTHER) */
4514 term->vt52_bold = FALSE;
4515 term->curr_attr = ATTR_DEFAULT;
4516 set_erase_char(term);
4519 /* compatibility(VI50) */
4520 term->curr_attr |= ATTR_UNDER;
4523 /* compatibility(VI50) */
4524 term->curr_attr &= ~ATTR_UNDER;
4527 /* compatibility(VI50) */
4528 term->vt52_bold = TRUE;
4529 term->curr_attr |= ATTR_BOLD;
4532 /* compatibility(VI50) */
4533 term->vt52_bold = FALSE;
4534 term->curr_attr &= ~ATTR_BOLD;
4540 term->termstate = VT52_Y2;
4541 move(term, term->curs.x, c - ' ', 0);
4544 term->termstate = TOPLEVEL;
4545 move(term, c - ' ', term->curs.y, 0);
4550 term->termstate = TOPLEVEL;
4551 term->curr_attr &= ~ATTR_FGMASK;
4552 term->curr_attr &= ~ATTR_BOLD;
4553 term->curr_attr |= (c & 0xF) << ATTR_FGSHIFT;
4554 set_erase_char(term);
4557 term->termstate = TOPLEVEL;
4558 term->curr_attr &= ~ATTR_BGMASK;
4559 term->curr_attr &= ~ATTR_BLINK;
4560 term->curr_attr |= (c & 0xF) << ATTR_BGSHIFT;
4561 set_erase_char(term);
4564 default: break; /* placate gcc warning about enum use */
4566 if (term->selstate != NO_SELECTION) {
4567 pos cursplus = term->curs;
4569 check_selection(term, term->curs, cursplus);
4573 term_print_flush(term);
4575 logflush(term->logctx);
4579 * To prevent having to run the reasonably tricky bidi algorithm
4580 * too many times, we maintain a cache of the last lineful of data
4581 * fed to the algorithm on each line of the display.
4583 static int term_bidi_cache_hit(Terminal *term, int line,
4584 termchar *lbefore, int width)
4588 if (!term->pre_bidi_cache)
4589 return FALSE; /* cache doesn't even exist yet! */
4591 if (line >= term->bidi_cache_size)
4592 return FALSE; /* cache doesn't have this many lines */
4594 if (!term->pre_bidi_cache[line].chars)
4595 return FALSE; /* cache doesn't contain _this_ line */
4597 if (term->pre_bidi_cache[line].width != width)
4598 return FALSE; /* line is wrong width */
4600 for (i = 0; i < width; i++)
4601 if (!termchars_equal(term->pre_bidi_cache[line].chars+i, lbefore+i))
4602 return FALSE; /* line doesn't match cache */
4604 return TRUE; /* it didn't match. */
4607 static void term_bidi_cache_store(Terminal *term, int line, termchar *lbefore,
4608 termchar *lafter, bidi_char *wcTo,
4609 int width, int size)
4613 if (!term->pre_bidi_cache || term->bidi_cache_size <= line) {
4614 int j = term->bidi_cache_size;
4615 term->bidi_cache_size = line+1;
4616 term->pre_bidi_cache = sresize(term->pre_bidi_cache,
4617 term->bidi_cache_size,
4618 struct bidi_cache_entry);
4619 term->post_bidi_cache = sresize(term->post_bidi_cache,
4620 term->bidi_cache_size,
4621 struct bidi_cache_entry);
4622 while (j < term->bidi_cache_size) {
4623 term->pre_bidi_cache[j].chars =
4624 term->post_bidi_cache[j].chars = NULL;
4625 term->pre_bidi_cache[j].width =
4626 term->post_bidi_cache[j].width = -1;
4627 term->pre_bidi_cache[j].forward =
4628 term->post_bidi_cache[j].forward = NULL;
4629 term->pre_bidi_cache[j].backward =
4630 term->post_bidi_cache[j].backward = NULL;
4635 sfree(term->pre_bidi_cache[line].chars);
4636 sfree(term->post_bidi_cache[line].chars);
4637 sfree(term->post_bidi_cache[line].forward);
4638 sfree(term->post_bidi_cache[line].backward);
4640 term->pre_bidi_cache[line].width = width;
4641 term->pre_bidi_cache[line].chars = snewn(size, termchar);
4642 term->post_bidi_cache[line].width = width;
4643 term->post_bidi_cache[line].chars = snewn(size, termchar);
4644 term->post_bidi_cache[line].forward = snewn(width, int);
4645 term->post_bidi_cache[line].backward = snewn(width, int);
4647 memcpy(term->pre_bidi_cache[line].chars, lbefore, size * TSIZE);
4648 memcpy(term->post_bidi_cache[line].chars, lafter, size * TSIZE);
4649 memset(term->post_bidi_cache[line].forward, 0, width * sizeof(int));
4650 memset(term->post_bidi_cache[line].backward, 0, width * sizeof(int));
4652 for (i = 0; i < width; i++) {
4653 int p = wcTo[i].index;
4655 assert(0 <= p && p < width);
4657 term->post_bidi_cache[line].backward[i] = p;
4658 term->post_bidi_cache[line].forward[p] = i;
4663 * Prepare the bidi information for a screen line. Returns the
4664 * transformed list of termchars, or NULL if no transformation at
4665 * all took place (because bidi is disabled). If return was
4666 * non-NULL, auxiliary information such as the forward and reverse
4667 * mappings of permutation position are available in
4668 * term->post_bidi_cache[scr_y].*.
4670 static termchar *term_bidi_line(Terminal *term, struct termline *ldata,
4676 /* Do Arabic shaping and bidi. */
4677 if(!term->bidi || !term->arabicshaping) {
4679 if (!term_bidi_cache_hit(term, scr_y, ldata->chars, term->cols)) {
4681 if (term->wcFromTo_size < term->cols) {
4682 term->wcFromTo_size = term->cols;
4683 term->wcFrom = sresize(term->wcFrom, term->wcFromTo_size,
4685 term->wcTo = sresize(term->wcTo, term->wcFromTo_size,
4689 for(it=0; it<term->cols ; it++)
4691 unsigned long uc = (ldata->chars[it].chr);
4693 switch (uc & CSET_MASK) {
4695 if (!term->rawcnp) {
4696 uc = term->ucsdata->unitab_xterm[uc & 0xFF];
4700 uc = term->ucsdata->unitab_line[uc & 0xFF];
4703 uc = term->ucsdata->unitab_scoacs[uc&0xFF];
4706 switch (uc & CSET_MASK) {
4708 uc = term->ucsdata->unitab_font[uc & 0xFF];
4711 uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
4715 term->wcFrom[it].origwc = term->wcFrom[it].wc =
4717 term->wcFrom[it].index = it;
4721 do_bidi(term->wcFrom, term->cols);
4723 /* this is saved iff done from inside the shaping */
4724 if(!term->bidi && term->arabicshaping)
4725 for(it=0; it<term->cols; it++)
4726 term->wcTo[it] = term->wcFrom[it];
4728 if(!term->arabicshaping)
4729 do_shape(term->wcFrom, term->wcTo, term->cols);
4731 if (term->ltemp_size < ldata->size) {
4732 term->ltemp_size = ldata->size;
4733 term->ltemp = sresize(term->ltemp, term->ltemp_size,
4737 memcpy(term->ltemp, ldata->chars, ldata->size * TSIZE);
4739 for(it=0; it<term->cols ; it++)
4741 term->ltemp[it] = ldata->chars[term->wcTo[it].index];
4742 if (term->ltemp[it].cc_next)
4743 term->ltemp[it].cc_next -=
4744 it - term->wcTo[it].index;
4746 if (term->wcTo[it].origwc != term->wcTo[it].wc)
4747 term->ltemp[it].chr = term->wcTo[it].wc;
4749 term_bidi_cache_store(term, scr_y, ldata->chars,
4750 term->ltemp, term->wcTo,
4751 term->cols, ldata->size);
4753 lchars = term->ltemp;
4755 lchars = term->post_bidi_cache[scr_y].chars;
4765 * Given a context, update the window. Out of paranoia, we don't
4766 * allow WM_PAINT responses to do scrolling optimisations.
4768 static void do_paint(Terminal *term, Context ctx, int may_optimise)
4770 int i, j, our_curs_y, our_curs_x;
4775 #ifdef OPTIMISE_SCROLL
4776 struct scrollregion *sr;
4777 #endif /* OPTIMISE_SCROLL */
4781 ch = snewn(chlen, wchar_t);
4783 newline = snewn(term->cols, termchar);
4785 rv = (!term->rvideo ^ !term->in_vbell ? ATTR_REVERSE : 0);
4788 * screen array, disptop, scrtop,
4790 * blinkpc, blink_is_real, tblinker,
4791 * curs.y, curs.x, cblinker, blink_cur, cursor_on, has_focus, wrapnext
4794 /* Has the cursor position or type changed ? */
4795 if (term->cursor_on) {
4796 if (term->has_focus) {
4797 if (term->cblinker || !term->blink_cur)
4798 cursor = TATTR_ACTCURS;
4802 cursor = TATTR_PASCURS;
4804 cursor |= TATTR_RIGHTCURS;
4807 our_curs_y = term->curs.y - term->disptop;
4810 * Adjust the cursor position:
4812 * - in the case where it's resting on the right-hand half
4813 * of a CJK wide character. xterm's behaviour here,
4814 * which seems adequate to me, is to display the cursor
4815 * covering the _whole_ character, exactly as if it were
4816 * one space to the left.
4818 termline *ldata = lineptr(term->curs.y);
4821 our_curs_x = term->curs.x;
4823 if ( (lchars = term_bidi_line(term, ldata, our_curs_y)) != NULL) {
4824 our_curs_x = term->post_bidi_cache[our_curs_y].forward[our_curs_x];
4826 lchars = ldata->chars;
4828 if (our_curs_x > 0 &&
4829 lchars[our_curs_x].chr == UCSWIDE)
4836 * If the cursor is not where it was last time we painted, and
4837 * its previous position is visible on screen, invalidate its
4838 * previous position.
4840 if (term->dispcursy >= 0 &&
4841 (term->curstype != cursor ||
4842 term->dispcursy != our_curs_y ||
4843 term->dispcursx != our_curs_x)) {
4844 termchar *dispcurs = term->disptext[term->dispcursy]->chars +
4847 if (term->dispcursx > 0 && dispcurs->chr == UCSWIDE)
4848 dispcurs[-1].attr |= ATTR_INVALID;
4849 if (term->dispcursx < term->cols-1 && dispcurs[1].chr == UCSWIDE)
4850 dispcurs[1].attr |= ATTR_INVALID;
4851 dispcurs->attr |= ATTR_INVALID;
4855 term->dispcursx = term->dispcursy = -1;
4857 #ifdef OPTIMISE_SCROLL
4859 sr = term->scrollhead;
4861 struct scrollregion *next = sr->next;
4862 do_scroll(ctx, sr->topline, sr->botline, sr->lines);
4866 term->scrollhead = term->scrolltail = NULL;
4867 #endif /* OPTIMISE_SCROLL */
4869 /* The normal screen data */
4870 for (i = 0; i < term->rows; i++) {
4873 int dirty_line, dirty_run, selected;
4874 unsigned long attr = 0, cset = 0;
4877 int last_run_dirty = 0;
4878 int laststart, dirtyrect;
4881 scrpos.y = i + term->disptop;
4882 ldata = lineptr(scrpos.y);
4884 /* Do Arabic shaping and bidi. */
4885 lchars = term_bidi_line(term, ldata, i);
4887 backward = term->post_bidi_cache[i].backward;
4889 lchars = ldata->chars;
4894 * First loop: work along the line deciding what we want
4895 * each character cell to look like.
4897 for (j = 0; j < term->cols; j++) {
4898 unsigned long tattr, tchar;
4899 termchar *d = lchars + j;
4900 scrpos.x = backward ? backward[j] : j;
4905 if (!term->ansi_colour)
4906 tattr = (tattr & ~(ATTR_FGMASK | ATTR_BGMASK)) |
4907 ATTR_DEFFG | ATTR_DEFBG;
4909 if (!term->xterm_256_colour) {
4911 colour = (tattr & ATTR_FGMASK) >> ATTR_FGSHIFT;
4912 if (colour >= 16 && colour < 256)
4913 tattr = (tattr &~ ATTR_FGMASK) | ATTR_DEFFG;
4914 colour = (tattr & ATTR_BGMASK) >> ATTR_BGSHIFT;
4915 if (colour >= 16 && colour < 256)
4916 tattr = (tattr &~ ATTR_BGMASK) | ATTR_DEFBG;
4919 switch (tchar & CSET_MASK) {
4921 tchar = term->ucsdata->unitab_line[tchar & 0xFF];
4924 tchar = term->ucsdata->unitab_xterm[tchar & 0xFF];
4927 tchar = term->ucsdata->unitab_scoacs[tchar&0xFF];
4930 if (j < term->cols-1 && d[1].chr == UCSWIDE)
4933 /* Video reversing things */
4934 if (term->selstate == DRAGGING || term->selstate == SELECTED) {
4935 if (term->seltype == LEXICOGRAPHIC)
4936 selected = (posle(term->selstart, scrpos) &&
4937 poslt(scrpos, term->selend));
4939 selected = (posPle(term->selstart, scrpos) &&
4940 posPlt(scrpos, term->selend));
4944 ^ (selected ? ATTR_REVERSE : 0));
4946 /* 'Real' blinking ? */
4947 if (term->blink_is_real && (tattr & ATTR_BLINK)) {
4948 if (term->has_focus && term->tblinker) {
4949 tchar = term->ucsdata->unitab_line[(unsigned char)' '];
4951 tattr &= ~ATTR_BLINK;
4955 * Check the font we'll _probably_ be using to see if
4956 * the character is wide when we don't want it to be.
4958 if (tchar != term->disptext[i]->chars[j].chr ||
4959 tattr != (term->disptext[i]->chars[j].attr &~
4960 (ATTR_NARROW | DATTR_MASK))) {
4961 if ((tattr & ATTR_WIDE) == 0 && char_width(ctx, tchar) == 2)
4962 tattr |= ATTR_NARROW;
4963 } else if (term->disptext[i]->chars[j].attr & ATTR_NARROW)
4964 tattr |= ATTR_NARROW;
4966 if (i == our_curs_y && j == our_curs_x) {
4968 term->curstype = cursor;
4969 term->dispcursx = j;
4970 term->dispcursy = i;
4974 newline[j].attr = tattr;
4975 newline[j].chr = tchar;
4976 /* Combining characters are still read from lchars */
4977 newline[j].cc_next = 0;
4981 * Now loop over the line again, noting where things have
4984 * During this loop, we keep track of where we last saw
4985 * DATTR_STARTRUN. Any mismatch automatically invalidates
4986 * _all_ of the containing run that was last printed: that
4987 * is, any rectangle that was drawn in one go in the
4988 * previous update should be either left completely alone
4989 * or overwritten in its entirety. This, along with the
4990 * expectation that front ends clip all text runs to their
4991 * bounding rectangle, should solve any possible problems
4992 * with fonts that overflow their character cells.
4996 for (j = 0; j < term->cols; j++) {
4997 if (term->disptext[i]->chars[j].attr & DATTR_STARTRUN) {
5002 if (term->disptext[i]->chars[j].chr != newline[j].chr ||
5003 (term->disptext[i]->chars[j].attr &~ DATTR_MASK)
5004 != newline[j].attr) {
5008 for (k = laststart; k < j; k++)
5009 term->disptext[i]->chars[k].attr |= ATTR_INVALID;
5016 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5020 * Finally, loop once more and actually do the drawing.
5022 dirty_run = dirty_line = (ldata->lattr !=
5023 term->disptext[i]->lattr);
5024 term->disptext[i]->lattr = ldata->lattr;
5026 for (j = 0; j < term->cols; j++) {
5027 unsigned long tattr, tchar;
5028 int break_run, do_copy;
5029 termchar *d = lchars + j;
5031 tattr = newline[j].attr;
5032 tchar = newline[j].chr;
5034 if ((term->disptext[i]->chars[j].attr ^ tattr) & ATTR_WIDE)
5037 break_run = ((tattr ^ attr) & term->attr_mask) != 0;
5039 #ifdef USES_VTLINE_HACK
5040 /* Special hack for VT100 Linedraw glyphs */
5041 if ((tchar >= 0x23BA && tchar <= 0x23BD) ||
5042 (j > 0 && (newline[j-1].chr >= 0x23BA &&
5043 newline[j-1].chr <= 0x23BD)))
5048 * Separate out sequences of characters that have the
5049 * same CSET, if that CSET is a magic one.
5051 if (CSET_OF(tchar) != cset)
5055 * Break on both sides of any combined-character cell.
5057 if (d->cc_next != 0 ||
5058 (j > 0 && d[-1].cc_next != 0))
5061 if (!term->ucsdata->dbcs_screenfont && !dirty_line) {
5062 if (term->disptext[i]->chars[j].chr == tchar &&
5063 (term->disptext[i]->chars[j].attr &~ DATTR_MASK) == tattr)
5065 else if (!dirty_run && ccount == 1)
5070 if ((dirty_run || last_run_dirty) && ccount > 0) {
5071 do_text(ctx, start, i, ch, ccount, attr,
5073 if (attr & (TATTR_ACTCURS | TATTR_PASCURS))
5074 do_cursor(ctx, start, i, ch, ccount, attr,
5080 cset = CSET_OF(tchar);
5081 if (term->ucsdata->dbcs_screenfont)
5082 last_run_dirty = dirty_run;
5083 dirty_run = dirty_line;
5087 if (!termchars_equal_override(&term->disptext[i]->chars[j],
5093 if (ccount+2 > chlen) {
5094 chlen = ccount + 256;
5095 ch = sresize(ch, chlen, wchar_t);
5098 #ifdef PLATFORM_IS_UTF16
5099 if (tchar > 0x10000 && tchar < 0x110000) {
5100 ch[ccount++] = (wchar_t) HIGH_SURROGATE_OF(tchar);
5101 ch[ccount++] = (wchar_t) LOW_SURROGATE_OF(tchar);
5103 #endif /* PLATFORM_IS_UTF16 */
5104 ch[ccount++] = (wchar_t) tchar;
5109 while (dd->cc_next) {
5110 unsigned long schar;
5115 switch (schar & CSET_MASK) {
5117 schar = term->ucsdata->unitab_line[schar & 0xFF];
5120 schar = term->ucsdata->unitab_xterm[schar & 0xFF];
5123 schar = term->ucsdata->unitab_scoacs[schar&0xFF];
5127 if (ccount+2 > chlen) {
5128 chlen = ccount + 256;
5129 ch = sresize(ch, chlen, wchar_t);
5132 #ifdef PLATFORM_IS_UTF16
5133 if (schar > 0x10000 && schar < 0x110000) {
5134 ch[ccount++] = (wchar_t) HIGH_SURROGATE_OF(schar);
5135 ch[ccount++] = (wchar_t) LOW_SURROGATE_OF(schar);
5137 #endif /* PLATFORM_IS_UTF16 */
5138 ch[ccount++] = (wchar_t) schar;
5141 attr |= TATTR_COMBINING;
5145 copy_termchar(term->disptext[i], j, d);
5146 term->disptext[i]->chars[j].chr = tchar;
5147 term->disptext[i]->chars[j].attr = tattr;
5149 term->disptext[i]->chars[j].attr |= DATTR_STARTRUN;
5152 /* If it's a wide char step along to the next one. */
5153 if (tattr & ATTR_WIDE) {
5154 if (++j < term->cols) {
5157 * By construction above, the cursor should not
5158 * be on the right-hand half of this character.
5161 assert(!(i == our_curs_y && j == our_curs_x));
5162 if (!termchars_equal(&term->disptext[i]->chars[j], d))
5164 copy_termchar(term->disptext[i], j, d);
5168 if (dirty_run && ccount > 0) {
5169 do_text(ctx, start, i, ch, ccount, attr,
5171 if (attr & (TATTR_ACTCURS | TATTR_PASCURS))
5172 do_cursor(ctx, start, i, ch, ccount, attr,
5184 * Invalidate the whole screen so it will be repainted in full.
5186 void term_invalidate(Terminal *term)
5190 for (i = 0; i < term->rows; i++)
5191 for (j = 0; j < term->cols; j++)
5192 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5194 term_schedule_update(term);
5198 * Paint the window in response to a WM_PAINT message.
5200 void term_paint(Terminal *term, Context ctx,
5201 int left, int top, int right, int bottom, int immediately)
5204 if (left < 0) left = 0;
5205 if (top < 0) top = 0;
5206 if (right >= term->cols) right = term->cols-1;
5207 if (bottom >= term->rows) bottom = term->rows-1;
5209 for (i = top; i <= bottom && i < term->rows; i++) {
5210 if ((term->disptext[i]->lattr & LATTR_MODE) == LATTR_NORM)
5211 for (j = left; j <= right && j < term->cols; j++)
5212 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5214 for (j = left / 2; j <= right / 2 + 1 && j < term->cols; j++)
5215 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5219 do_paint (term, ctx, FALSE);
5221 term_schedule_update(term);
5226 * Attempt to scroll the scrollback. The second parameter gives the
5227 * position we want to scroll to; the first is +1 to denote that
5228 * this position is relative to the beginning of the scrollback, -1
5229 * to denote it is relative to the end, and 0 to denote that it is
5230 * relative to the current position.
5232 void term_scroll(Terminal *term, int rel, int where)
5234 int sbtop = -sblines(term);
5235 #ifdef OPTIMISE_SCROLL
5236 int olddisptop = term->disptop;
5238 #endif /* OPTIMISE_SCROLL */
5240 term->disptop = (rel < 0 ? 0 : rel > 0 ? sbtop : term->disptop) + where;
5241 if (term->disptop < sbtop)
5242 term->disptop = sbtop;
5243 if (term->disptop > 0)
5246 #ifdef OPTIMISE_SCROLL
5247 shift = (term->disptop - olddisptop);
5248 if (shift < term->rows && shift > -term->rows)
5249 scroll_display(term, 0, term->rows - 1, shift);
5250 #endif /* OPTIMISE_SCROLL */
5255 * Scroll the scrollback to centre it on the beginning or end of the
5256 * current selection, if any.
5258 void term_scroll_to_selection(Terminal *term, int which_end)
5262 int sbtop = -sblines(term);
5264 if (term->selstate != SELECTED)
5267 target = term->selend;
5269 target = term->selstart;
5271 y = target.y - term->rows/2;
5276 term_scroll(term, -1, y);
5280 * Helper routine for clipme(): growing buffer.
5283 int buflen; /* amount of allocated space in textbuf/attrbuf */
5284 int bufpos; /* amount of actual data */
5285 wchar_t *textbuf; /* buffer for copied text */
5286 wchar_t *textptr; /* = textbuf + bufpos (current insertion point) */
5287 int *attrbuf; /* buffer for copied attributes */
5288 int *attrptr; /* = attrbuf + bufpos */
5291 static void clip_addchar(clip_workbuf *b, wchar_t chr, int attr)
5293 if (b->bufpos >= b->buflen) {
5295 b->textbuf = sresize(b->textbuf, b->buflen, wchar_t);
5296 b->textptr = b->textbuf + b->bufpos;
5297 b->attrbuf = sresize(b->attrbuf, b->buflen, int);
5298 b->attrptr = b->attrbuf + b->bufpos;
5300 *b->textptr++ = chr;
5301 *b->attrptr++ = attr;
5305 static void clipme(Terminal *term, pos top, pos bottom, int rect, int desel)
5313 buf.textptr = buf.textbuf = snewn(buf.buflen, wchar_t);
5314 buf.attrptr = buf.attrbuf = snewn(buf.buflen, int);
5316 old_top_x = top.x; /* needed for rect==1 */
5318 while (poslt(top, bottom)) {
5320 termline *ldata = lineptr(top.y);
5324 * nlpos will point at the maximum position on this line we
5325 * should copy up to. So we start it at the end of the
5329 nlpos.x = term->cols;
5332 * ... move it backwards if there's unused space at the end
5333 * of the line (and also set `nl' if this is the case,
5334 * because in normal selection mode this means we need a
5335 * newline at the end)...
5337 if (!(ldata->lattr & LATTR_WRAPPED)) {
5339 IS_SPACE_CHR(ldata->chars[nlpos.x - 1].chr) &&
5340 !ldata->chars[nlpos.x - 1].cc_next &&
5343 if (poslt(nlpos, bottom))
5345 } else if (ldata->lattr & LATTR_WRAPPED2) {
5346 /* Ignore the last char on the line in a WRAPPED2 line. */
5351 * ... and then clip it to the terminal x coordinate if
5352 * we're doing rectangular selection. (In this case we
5353 * still did the above, so that copying e.g. the right-hand
5354 * column from a table doesn't fill with spaces on the
5358 if (nlpos.x > bottom.x)
5360 nl = (top.y < bottom.y);
5363 while (poslt(top, bottom) && poslt(top, nlpos)) {
5366 sprintf(cbuf, "<U+%04x>", (ldata[top.x] & 0xFFFF));
5368 wchar_t cbuf[16], *p;
5372 if (ldata->chars[x].chr == UCSWIDE) {
5378 int uc = ldata->chars[x].chr;
5379 attr = ldata->chars[x].attr;
5381 switch (uc & CSET_MASK) {
5383 if (!term->rawcnp) {
5384 uc = term->ucsdata->unitab_xterm[uc & 0xFF];
5388 uc = term->ucsdata->unitab_line[uc & 0xFF];
5391 uc = term->ucsdata->unitab_scoacs[uc&0xFF];
5394 switch (uc & CSET_MASK) {
5396 uc = term->ucsdata->unitab_font[uc & 0xFF];
5399 uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
5403 c = (uc & ~CSET_MASK);
5404 #ifdef PLATFORM_IS_UTF16
5405 if (uc > 0x10000 && uc < 0x110000) {
5406 cbuf[0] = 0xD800 | ((uc - 0x10000) >> 10);
5407 cbuf[1] = 0xDC00 | ((uc - 0x10000) & 0x3FF);
5416 if (DIRECT_FONT(uc)) {
5417 if (c >= ' ' && c != 0x7F) {
5421 if (is_dbcs_leadbyte(term->ucsdata->font_codepage, (BYTE) c)) {
5423 buf[1] = (char) (0xFF & ldata->chars[top.x + 1].chr);
5424 rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 2, wbuf, 4);
5428 rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 1, wbuf, 4);
5432 memcpy(cbuf, wbuf, rv * sizeof(wchar_t));
5439 for (p = cbuf; *p; p++)
5440 clip_addchar(&buf, *p, attr);
5442 if (ldata->chars[x].cc_next)
5443 x += ldata->chars[x].cc_next;
5451 for (i = 0; i < sel_nl_sz; i++)
5452 clip_addchar(&buf, sel_nl[i], 0);
5455 top.x = rect ? old_top_x : 0;
5459 #if SELECTION_NUL_TERMINATED
5460 clip_addchar(&buf, 0, 0);
5462 /* Finally, transfer all that to the clipboard. */
5463 write_clip(term->frontend, buf.textbuf, buf.attrbuf, buf.bufpos, desel);
5468 void term_copyall(Terminal *term)
5472 tree234 *screen = term->screen;
5473 top.y = -sblines(term);
5475 bottom.y = find_last_nonempty_line(term, screen);
5476 bottom.x = term->cols;
5477 clipme(term, top, bottom, 0, TRUE);
5481 * The wordness array is mainly for deciding the disposition of the
5482 * US-ASCII characters.
5484 static int wordtype(Terminal *term, int uc)
5487 int start, end, ctype;
5489 static const struct ucsword ucs_words[] = {
5495 0x037e, 0x037e, 1}, /* Greek question mark */
5497 0x0387, 0x0387, 1}, /* Greek ano teleia */
5499 0x055a, 0x055f, 1}, /* Armenian punctuation */
5501 0x0589, 0x0589, 1}, /* Armenian full stop */
5503 0x0700, 0x070d, 1}, /* Syriac punctuation */
5505 0x104a, 0x104f, 1}, /* Myanmar punctuation */
5507 0x10fb, 0x10fb, 1}, /* Georgian punctuation */
5509 0x1361, 0x1368, 1}, /* Ethiopic punctuation */
5511 0x166d, 0x166e, 1}, /* Canadian Syl. punctuation */
5513 0x17d4, 0x17dc, 1}, /* Khmer punctuation */
5515 0x1800, 0x180a, 1}, /* Mongolian punctuation */
5517 0x2000, 0x200a, 0}, /* Various spaces */
5519 0x2070, 0x207f, 2}, /* superscript */
5521 0x2080, 0x208f, 2}, /* subscript */
5523 0x200b, 0x27ff, 1}, /* punctuation and symbols */
5525 0x3000, 0x3000, 0}, /* ideographic space */
5527 0x3001, 0x3020, 1}, /* ideographic punctuation */
5529 0x303f, 0x309f, 3}, /* Hiragana */
5531 0x30a0, 0x30ff, 3}, /* Katakana */
5533 0x3300, 0x9fff, 3}, /* CJK Ideographs */
5535 0xac00, 0xd7a3, 3}, /* Hangul Syllables */
5537 0xf900, 0xfaff, 3}, /* CJK Ideographs */
5539 0xfe30, 0xfe6b, 1}, /* punctuation forms */
5541 0xff00, 0xff0f, 1}, /* half/fullwidth ASCII */
5543 0xff1a, 0xff20, 1}, /* half/fullwidth ASCII */
5545 0xff3b, 0xff40, 1}, /* half/fullwidth ASCII */
5547 0xff5b, 0xff64, 1}, /* half/fullwidth ASCII */
5549 0xfff0, 0xffff, 0}, /* half/fullwidth ASCII */
5553 const struct ucsword *wptr;
5555 switch (uc & CSET_MASK) {
5557 uc = term->ucsdata->unitab_xterm[uc & 0xFF];
5560 uc = term->ucsdata->unitab_line[uc & 0xFF];
5563 uc = term->ucsdata->unitab_scoacs[uc&0xFF];
5566 switch (uc & CSET_MASK) {
5568 uc = term->ucsdata->unitab_font[uc & 0xFF];
5571 uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
5575 /* For DBCS fonts I can't do anything useful. Even this will sometimes
5576 * fail as there's such a thing as a double width space. :-(
5578 if (term->ucsdata->dbcs_screenfont &&
5579 term->ucsdata->font_codepage == term->ucsdata->line_codepage)
5583 return term->wordness[uc];
5585 for (wptr = ucs_words; wptr->start; wptr++) {
5586 if (uc >= wptr->start && uc <= wptr->end)
5594 * Spread the selection outwards according to the selection mode.
5596 static pos sel_spread_half(Terminal *term, pos p, int dir)
5600 int topy = -sblines(term);
5602 ldata = lineptr(p.y);
5604 switch (term->selmode) {
5607 * In this mode, every character is a separate unit, except
5608 * for runs of spaces at the end of a non-wrapping line.
5610 if (!(ldata->lattr & LATTR_WRAPPED)) {
5611 termchar *q = ldata->chars + term->cols;
5612 while (q > ldata->chars &&
5613 IS_SPACE_CHR(q[-1].chr) && !q[-1].cc_next)
5615 if (q == ldata->chars + term->cols)
5617 if (p.x >= q - ldata->chars)
5618 p.x = (dir == -1 ? q - ldata->chars : term->cols - 1);
5623 * In this mode, the units are maximal runs of characters
5624 * whose `wordness' has the same value.
5626 wvalue = wordtype(term, UCSGET(ldata->chars, p.x));
5629 int maxcols = (ldata->lattr & LATTR_WRAPPED2 ?
5630 term->cols-1 : term->cols);
5631 if (p.x < maxcols-1) {
5632 if (wordtype(term, UCSGET(ldata->chars, p.x+1)) == wvalue)
5637 if (p.y+1 < term->rows &&
5638 (ldata->lattr & LATTR_WRAPPED)) {
5640 ldata2 = lineptr(p.y+1);
5641 if (wordtype(term, UCSGET(ldata2->chars, 0))
5658 if (wordtype(term, UCSGET(ldata->chars, p.x-1)) == wvalue)
5667 ldata2 = lineptr(p.y-1);
5668 maxcols = (ldata2->lattr & LATTR_WRAPPED2 ?
5669 term->cols-1 : term->cols);
5670 if (ldata2->lattr & LATTR_WRAPPED) {
5671 if (wordtype(term, UCSGET(ldata2->chars, maxcols-1))
5689 * In this mode, every line is a unit.
5691 p.x = (dir == -1 ? 0 : term->cols - 1);
5699 static void sel_spread(Terminal *term)
5701 if (term->seltype == LEXICOGRAPHIC) {
5702 term->selstart = sel_spread_half(term, term->selstart, -1);
5703 decpos(term->selend);
5704 term->selend = sel_spread_half(term, term->selend, +1);
5705 incpos(term->selend);
5709 void term_do_paste(Terminal *term)
5714 get_clip(term->frontend, &data, &len);
5715 if (data && len > 0) {
5718 term_seen_key_event(term); /* pasted data counts */
5720 if (term->paste_buffer)
5721 sfree(term->paste_buffer);
5722 term->paste_pos = term->paste_hold = term->paste_len = 0;
5723 term->paste_buffer = snewn(len + 12, wchar_t);
5725 if (term->bracketed_paste) {
5726 memcpy(term->paste_buffer, L"\033[200~", 6 * sizeof(wchar_t));
5727 term->paste_len += 6;
5731 while (p < data + len) {
5732 while (p < data + len &&
5733 !(p <= data + len - sel_nl_sz &&
5734 !memcmp(p, sel_nl, sizeof(sel_nl))))
5739 for (i = 0; i < p - q; i++) {
5740 term->paste_buffer[term->paste_len++] = q[i];
5744 if (p <= data + len - sel_nl_sz &&
5745 !memcmp(p, sel_nl, sizeof(sel_nl))) {
5746 term->paste_buffer[term->paste_len++] = '\015';
5752 if (term->bracketed_paste) {
5753 memcpy(term->paste_buffer + term->paste_len,
5754 L"\033[201~", 6 * sizeof(wchar_t));
5755 term->paste_len += 6;
5758 /* Assume a small paste will be OK in one go. */
5759 if (term->paste_len < 256) {
5761 luni_send(term->ldisc, term->paste_buffer, term->paste_len, 0);
5762 if (term->paste_buffer)
5763 sfree(term->paste_buffer);
5764 term->paste_buffer = 0;
5765 term->paste_pos = term->paste_hold = term->paste_len = 0;
5768 get_clip(term->frontend, NULL, NULL);
5771 void term_mouse(Terminal *term, Mouse_Button braw, Mouse_Button bcooked,
5772 Mouse_Action a, int x, int y, int shift, int ctrl, int alt)
5776 int raw_mouse = (term->xterm_mouse &&
5777 !term->no_mouse_rep &&
5778 !(term->mouse_override && shift));
5779 int default_seltype;
5783 if (a == MA_DRAG && !raw_mouse)
5784 term_scroll(term, 0, -1);
5786 if (y >= term->rows) {
5788 if (a == MA_DRAG && !raw_mouse)
5789 term_scroll(term, 0, +1);
5798 if (x >= term->cols)
5801 selpoint.y = y + term->disptop;
5802 ldata = lineptr(selpoint.y);
5804 if ((ldata->lattr & LATTR_MODE) != LATTR_NORM)
5808 * Transform x through the bidi algorithm to find the _logical_
5809 * click point from the physical one.
5811 if (term_bidi_line(term, ldata, y) != NULL) {
5812 x = term->post_bidi_cache[y].backward[x];
5819 * If we're in the middle of a selection operation, we ignore raw
5820 * mouse mode until it's done (we must have been not in raw mouse
5821 * mode when it started).
5822 * This makes use of Shift for selection reliable, and avoids the
5823 * host seeing mouse releases for which they never saw corresponding
5827 (term->selstate != ABOUT_TO) && (term->selstate != DRAGGING)) {
5828 int encstate = 0, r, c;
5836 encstate = 0x00; /* left button down */
5847 case MBT_WHEEL_DOWN:
5850 default: break; /* placate gcc warning about enum use */
5854 if (term->xterm_mouse == 1)
5859 /* If multiple extensions are enabled, the xterm 1006 is used, so it's okay to check for only that */
5860 if (!term->xterm_extended_mouse)
5862 term->mouse_is_down = 0;
5865 if (term->mouse_is_down == braw)
5867 term->mouse_is_down = braw;
5869 default: break; /* placate gcc warning about enum use */
5878 /* Check the extensions in decreasing order of preference. Encoding the release event above assumes that 1006 comes first. */
5879 if (term->xterm_extended_mouse) {
5880 len = sprintf(abuf, "\033[<%d;%d;%d%c", encstate, c, r, a == MA_RELEASE ? 'm' : 'M');
5881 } else if (term->urxvt_extended_mouse) {
5882 len = sprintf(abuf, "\033[%d;%d;%dM", encstate + 32, c, r);
5883 } else if (c <= 223 && r <= 223) {
5884 len = sprintf(abuf, "\033[M%c%c%c", encstate + 32, c + 32, r + 32);
5886 ldisc_send(term->ldisc, abuf, len, 0);
5892 * Set the selection type (rectangular or normal) at the start
5893 * of a selection attempt, from the state of Alt.
5895 if (!alt ^ !term->rect_select)
5896 default_seltype = RECTANGULAR;
5898 default_seltype = LEXICOGRAPHIC;
5900 if (term->selstate == NO_SELECTION) {
5901 term->seltype = default_seltype;
5904 if (bcooked == MBT_SELECT && a == MA_CLICK) {
5906 term->selstate = ABOUT_TO;
5907 term->seltype = default_seltype;
5908 term->selanchor = selpoint;
5909 term->selmode = SM_CHAR;
5910 } else if (bcooked == MBT_SELECT && (a == MA_2CLK || a == MA_3CLK)) {
5912 term->selmode = (a == MA_2CLK ? SM_WORD : SM_LINE);
5913 term->selstate = DRAGGING;
5914 term->selstart = term->selanchor = selpoint;
5915 term->selend = term->selstart;
5916 incpos(term->selend);
5918 } else if ((bcooked == MBT_SELECT && a == MA_DRAG) ||
5919 (bcooked == MBT_EXTEND && a != MA_RELEASE)) {
5920 if (term->selstate == ABOUT_TO && poseq(term->selanchor, selpoint))
5922 if (bcooked == MBT_EXTEND && a != MA_DRAG &&
5923 term->selstate == SELECTED) {
5924 if (term->seltype == LEXICOGRAPHIC) {
5926 * For normal selection, we extend by moving
5927 * whichever end of the current selection is closer
5930 if (posdiff(selpoint, term->selstart) <
5931 posdiff(term->selend, term->selstart) / 2) {
5932 term->selanchor = term->selend;
5933 decpos(term->selanchor);
5935 term->selanchor = term->selstart;
5939 * For rectangular selection, we have a choice of
5940 * _four_ places to put selanchor and selpoint: the
5941 * four corners of the selection.
5943 if (2*selpoint.x < term->selstart.x + term->selend.x)
5944 term->selanchor.x = term->selend.x-1;
5946 term->selanchor.x = term->selstart.x;
5948 if (2*selpoint.y < term->selstart.y + term->selend.y)
5949 term->selanchor.y = term->selend.y;
5951 term->selanchor.y = term->selstart.y;
5953 term->selstate = DRAGGING;
5955 if (term->selstate != ABOUT_TO && term->selstate != DRAGGING)
5956 term->selanchor = selpoint;
5957 term->selstate = DRAGGING;
5958 if (term->seltype == LEXICOGRAPHIC) {
5960 * For normal selection, we set (selstart,selend) to
5961 * (selpoint,selanchor) in some order.
5963 if (poslt(selpoint, term->selanchor)) {
5964 term->selstart = selpoint;
5965 term->selend = term->selanchor;
5966 incpos(term->selend);
5968 term->selstart = term->selanchor;
5969 term->selend = selpoint;
5970 incpos(term->selend);
5974 * For rectangular selection, we may need to
5975 * interchange x and y coordinates (if the user has
5976 * dragged in the -x and +y directions, or vice versa).
5978 term->selstart.x = min(term->selanchor.x, selpoint.x);
5979 term->selend.x = 1+max(term->selanchor.x, selpoint.x);
5980 term->selstart.y = min(term->selanchor.y, selpoint.y);
5981 term->selend.y = max(term->selanchor.y, selpoint.y);
5984 } else if ((bcooked == MBT_SELECT || bcooked == MBT_EXTEND) &&
5986 if (term->selstate == DRAGGING) {
5988 * We've completed a selection. We now transfer the
5989 * data to the clipboard.
5991 clipme(term, term->selstart, term->selend,
5992 (term->seltype == RECTANGULAR), FALSE);
5993 term->selstate = SELECTED;
5995 term->selstate = NO_SELECTION;
5996 } else if (bcooked == MBT_PASTE
5998 #if MULTICLICK_ONLY_EVENT
5999 || a == MA_2CLK || a == MA_3CLK
6002 request_paste(term->frontend);
6006 * Since terminal output is suppressed during drag-selects, we
6007 * should make sure to write any pending output if one has just
6010 if (term->selstate != DRAGGING)
6015 int format_arrow_key(char *buf, Terminal *term, int xkey, int ctrl)
6019 if (term->vt52_mode)
6020 p += sprintf((char *) p, "\x1B%c", xkey);
6022 int app_flg = (term->app_cursor_keys && !term->no_applic_c);
6025 * RDB: VT100 & VT102 manuals both state the app cursor
6026 * keys only work if the app keypad is on.
6028 * SGT: That may well be true, but xterm disagrees and so
6029 * does at least one application, so I've #if'ed this out
6030 * and the behaviour is back to PuTTY's original: app
6031 * cursor and app keypad are independently switchable
6032 * modes. If anyone complains about _this_ I'll have to
6033 * put in a configurable option.
6035 if (!term->app_keypad_keys)
6038 /* Useful mapping of Ctrl-arrows */
6043 p += sprintf((char *) p, "\x1BO%c", xkey);
6045 p += sprintf((char *) p, "\x1B[%c", xkey);
6051 void term_nopaste(Terminal *term)
6053 if (term->paste_len == 0)
6055 sfree(term->paste_buffer);
6056 term->paste_buffer = NULL;
6057 term->paste_len = 0;
6060 int term_paste_pending(Terminal *term)
6062 return term->paste_len != 0;
6065 void term_paste(Terminal *term)
6067 long now, paste_diff;
6069 if (term->paste_len == 0)
6072 /* Don't wait forever to paste */
6073 if (term->paste_hold) {
6074 now = GETTICKCOUNT();
6075 paste_diff = now - term->last_paste;
6076 if (paste_diff >= 0 && paste_diff < 450)
6079 term->paste_hold = 0;
6081 while (term->paste_pos < term->paste_len) {
6083 while (n + term->paste_pos < term->paste_len) {
6084 if (term->paste_buffer[term->paste_pos + n++] == '\015')
6088 luni_send(term->ldisc, term->paste_buffer + term->paste_pos, n, 0);
6089 term->paste_pos += n;
6091 if (term->paste_pos < term->paste_len) {
6092 term->paste_hold = 1;
6096 sfree(term->paste_buffer);
6097 term->paste_buffer = NULL;
6098 term->paste_len = 0;
6101 static void deselect(Terminal *term)
6103 term->selstate = NO_SELECTION;
6104 term->selstart.x = term->selstart.y = term->selend.x = term->selend.y = 0;
6107 void term_deselect(Terminal *term)
6113 * Since terminal output is suppressed during drag-selects, we
6114 * should make sure to write any pending output if one has just
6117 if (term->selstate != DRAGGING)
6121 int term_ldisc(Terminal *term, int option)
6123 if (option == LD_ECHO)
6124 return term->term_echoing;
6125 if (option == LD_EDIT)
6126 return term->term_editing;
6130 int term_data(Terminal *term, int is_stderr, const char *data, int len)
6132 bufchain_add(&term->inbuf, data, len);
6134 if (!term->in_term_out) {
6135 term->in_term_out = TRUE;
6136 term_reset_cblink(term);
6138 * During drag-selects, we do not process terminal input,
6139 * because the user will want the screen to hold still to
6142 if (term->selstate != DRAGGING)
6144 term->in_term_out = FALSE;
6148 * term_out() always completely empties inbuf. Therefore,
6149 * there's no reason at all to return anything other than zero
6150 * from this function, because there _can't_ be a question of
6151 * the remote side needing to wait until term_out() has cleared
6154 * This is a slightly suboptimal way to deal with SSH-2 - in
6155 * principle, the window mechanism would allow us to continue
6156 * to accept data on forwarded ports and X connections even
6157 * while the terminal processing was going slowly - but we
6158 * can't do the 100% right thing without moving the terminal
6159 * processing into a separate thread, and that might hurt
6160 * portability. So we manage stdout buffering the old SSH-1 way:
6161 * if the terminal processing goes slowly, the whole SSH
6162 * connection stops accepting data until it's ready.
6164 * In practice, I can't imagine this causing serious trouble.
6170 * Write untrusted data to the terminal.
6171 * The only control character that should be honoured is \n (which
6172 * will behave as a CRLF).
6174 int term_data_untrusted(Terminal *term, const char *data, int len)
6177 /* FIXME: more sophisticated checking? */
6178 for (i = 0; i < len; i++) {
6179 if (data[i] == '\n')
6180 term_data(term, 1, "\r\n", 2);
6181 else if (data[i] & 0x60)
6182 term_data(term, 1, data + i, 1);
6184 return 0; /* assumes that term_data() always returns 0 */
6187 void term_provide_logctx(Terminal *term, void *logctx)
6189 term->logctx = logctx;
6192 void term_set_focus(Terminal *term, int has_focus)
6194 term->has_focus = has_focus;
6195 term_schedule_cblink(term);
6199 * Provide "auto" settings for remote tty modes, suitable for an
6200 * application with a terminal window.
6202 char *term_get_ttymode(Terminal *term, const char *mode)
6205 if (strcmp(mode, "ERASE") == 0) {
6206 val = term->bksp_is_delete ? "^?" : "^H";
6208 /* FIXME: perhaps we should set ONLCR based on lfhascr as well? */
6209 /* FIXME: or ECHO and friends based on local echo state? */
6213 struct term_userpass_state {
6215 int done_prompt; /* printed out prompt yet? */
6216 size_t pos; /* cursor position */
6220 * Process some terminal data in the course of username/password
6223 int term_get_userpass_input(Terminal *term, prompts_t *p,
6224 unsigned char *in, int inlen)
6226 struct term_userpass_state *s = (struct term_userpass_state *)p->data;
6229 * First call. Set some stuff up.
6231 p->data = s = snew(struct term_userpass_state);
6234 /* We only print the `name' caption if we have to... */
6235 if (p->name_reqd && p->name) {
6236 size_t l = strlen(p->name);
6237 term_data_untrusted(term, p->name, l);
6238 if (p->name[l-1] != '\n')
6239 term_data_untrusted(term, "\n", 1);
6241 /* ...but we always print any `instruction'. */
6242 if (p->instruction) {
6243 size_t l = strlen(p->instruction);
6244 term_data_untrusted(term, p->instruction, l);
6245 if (p->instruction[l-1] != '\n')
6246 term_data_untrusted(term, "\n", 1);
6249 * Zero all the results, in case we abort half-way through.
6253 for (i = 0; i < (int)p->n_prompts; i++)
6254 prompt_set_result(p->prompts[i], "");
6258 while (s->curr_prompt < p->n_prompts) {
6260 prompt_t *pr = p->prompts[s->curr_prompt];
6261 int finished_prompt = 0;
6263 if (!s->done_prompt) {
6264 term_data_untrusted(term, pr->prompt, strlen(pr->prompt));
6269 /* Breaking out here ensures that the prompt is printed even
6270 * if we're now waiting for user data. */
6271 if (!in || !inlen) break;
6273 /* FIXME: should we be using local-line-editing code instead? */
6274 while (!finished_prompt && inlen) {
6280 term_data(term, 0, "\r\n", 2);
6281 prompt_ensure_result_size(pr, s->pos + 1);
6282 pr->result[s->pos] = '\0';
6283 /* go to next prompt, if any */
6286 finished_prompt = 1; /* break out */
6292 term_data(term, 0, "\b \b", 3);
6298 while (s->pos > 0) {
6300 term_data(term, 0, "\b \b", 3);
6306 /* Immediate abort. */
6307 term_data(term, 0, "\r\n", 2);
6310 return 0; /* user abort */
6313 * This simplistic check for printability is disabled
6314 * when we're doing password input, because some people
6315 * have control characters in their passwords.
6317 if (!pr->echo || (c >= ' ' && c <= '~') ||
6318 ((unsigned char) c >= 160)) {
6319 prompt_ensure_result_size(pr, s->pos + 1);
6320 pr->result[s->pos++] = c;
6322 term_data(term, 0, &c, 1);
6330 if (s->curr_prompt < p->n_prompts) {
6331 return -1; /* more data required */
6335 return +1; /* all done */