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, long now)
1070 Terminal *term = (Terminal *)ctx;
1073 if (term->tblink_pending && now - term->next_tblink >= 0) {
1074 term->tblinker = !term->tblinker;
1075 term->tblink_pending = FALSE;
1076 term_schedule_tblink(term);
1080 if (term->cblink_pending && now - term->next_cblink >= 0) {
1081 term->cblinker = !term->cblinker;
1082 term->cblink_pending = FALSE;
1083 term_schedule_cblink(term);
1087 if (term->in_vbell && now - term->vbell_end >= 0) {
1088 term->in_vbell = FALSE;
1093 (term->window_update_pending && now - term->next_update >= 0))
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 set_raw_mouse_mode(term->frontend, FALSE);
1230 for (i = 0; i < 256; i++)
1231 term->wordness[i] = conf_get_int_int(term->conf, CONF_wordness, i);
1234 swap_screen(term, 1, FALSE, FALSE);
1235 erase_lots(term, FALSE, TRUE, TRUE);
1236 swap_screen(term, 0, FALSE, FALSE);
1238 erase_lots(term, FALSE, TRUE, TRUE);
1239 term->curs.y = find_last_nonempty_line(term, term->screen) + 1;
1240 if (term->curs.y == term->rows) {
1242 scroll(term, 0, term->rows - 1, 1, TRUE);
1248 term_schedule_tblink(term);
1249 term_schedule_cblink(term);
1253 * Force a screen update.
1255 void term_update(Terminal *term)
1259 term->window_update_pending = FALSE;
1261 ctx = get_ctx(term->frontend);
1263 int need_sbar_update = term->seen_disp_event;
1264 if (term->seen_disp_event && term->scroll_on_disp) {
1265 term->disptop = 0; /* return to main screen */
1266 term->seen_disp_event = 0;
1267 need_sbar_update = TRUE;
1270 if (need_sbar_update)
1272 do_paint(term, ctx, TRUE);
1273 sys_cursor(term->frontend, term->curs.x, term->curs.y - term->disptop);
1279 * Called from front end when a keypress occurs, to trigger
1280 * anything magical that needs to happen in that situation.
1282 void term_seen_key_event(Terminal *term)
1285 * On any keypress, clear the bell overload mechanism
1286 * completely, on the grounds that large numbers of
1287 * beeps coming from deliberate key action are likely
1288 * to be intended (e.g. beeps from filename completion
1289 * blocking repeatedly).
1291 term->beep_overloaded = FALSE;
1292 while (term->beephead) {
1293 struct beeptime *tmp = term->beephead;
1294 term->beephead = tmp->next;
1297 term->beeptail = NULL;
1301 * Reset the scrollback on keypress, if we're doing that.
1303 if (term->scroll_on_key) {
1304 term->disptop = 0; /* return to main screen */
1305 seen_disp_event(term);
1310 * Same as power_on(), but an external function.
1312 void term_pwron(Terminal *term, int clear)
1314 power_on(term, clear);
1315 if (term->ldisc) /* cause ldisc to notice changes */
1316 ldisc_send(term->ldisc, NULL, 0, 0);
1322 static void set_erase_char(Terminal *term)
1324 term->erase_char = term->basic_erase_char;
1326 term->erase_char.attr = (term->curr_attr &
1327 (ATTR_FGMASK | ATTR_BGMASK));
1331 * We copy a bunch of stuff out of the Conf structure into local
1332 * fields in the Terminal structure, to avoid the repeated tree234
1333 * lookups which would be involved in fetching them from the former
1336 void term_copy_stuff_from_conf(Terminal *term)
1338 term->ansi_colour = conf_get_int(term->conf, CONF_ansi_colour);
1339 term->arabicshaping = conf_get_int(term->conf, CONF_arabicshaping);
1340 term->beep = conf_get_int(term->conf, CONF_beep);
1341 term->bellovl = conf_get_int(term->conf, CONF_bellovl);
1342 term->bellovl_n = conf_get_int(term->conf, CONF_bellovl_n);
1343 term->bellovl_s = conf_get_int(term->conf, CONF_bellovl_s);
1344 term->bellovl_t = conf_get_int(term->conf, CONF_bellovl_t);
1345 term->bidi = conf_get_int(term->conf, CONF_bidi);
1346 term->bksp_is_delete = conf_get_int(term->conf, CONF_bksp_is_delete);
1347 term->blink_cur = conf_get_int(term->conf, CONF_blink_cur);
1348 term->blinktext = conf_get_int(term->conf, CONF_blinktext);
1349 term->cjk_ambig_wide = conf_get_int(term->conf, CONF_cjk_ambig_wide);
1350 term->conf_height = conf_get_int(term->conf, CONF_height);
1351 term->conf_width = conf_get_int(term->conf, CONF_width);
1352 term->crhaslf = conf_get_int(term->conf, CONF_crhaslf);
1353 term->erase_to_scrollback = conf_get_int(term->conf, CONF_erase_to_scrollback);
1354 term->funky_type = conf_get_int(term->conf, CONF_funky_type);
1355 term->lfhascr = conf_get_int(term->conf, CONF_lfhascr);
1356 term->logflush = conf_get_int(term->conf, CONF_logflush);
1357 term->logtype = conf_get_int(term->conf, CONF_logtype);
1358 term->mouse_override = conf_get_int(term->conf, CONF_mouse_override);
1359 term->nethack_keypad = conf_get_int(term->conf, CONF_nethack_keypad);
1360 term->no_alt_screen = conf_get_int(term->conf, CONF_no_alt_screen);
1361 term->no_applic_c = conf_get_int(term->conf, CONF_no_applic_c);
1362 term->no_applic_k = conf_get_int(term->conf, CONF_no_applic_k);
1363 term->no_dbackspace = conf_get_int(term->conf, CONF_no_dbackspace);
1364 term->no_mouse_rep = conf_get_int(term->conf, CONF_no_mouse_rep);
1365 term->no_remote_charset = conf_get_int(term->conf, CONF_no_remote_charset);
1366 term->no_remote_resize = conf_get_int(term->conf, CONF_no_remote_resize);
1367 term->no_remote_wintitle = conf_get_int(term->conf, CONF_no_remote_wintitle);
1368 term->rawcnp = conf_get_int(term->conf, CONF_rawcnp);
1369 term->rect_select = conf_get_int(term->conf, CONF_rect_select);
1370 term->remote_qtitle_action = conf_get_int(term->conf, CONF_remote_qtitle_action);
1371 term->rxvt_homeend = conf_get_int(term->conf, CONF_rxvt_homeend);
1372 term->scroll_on_disp = conf_get_int(term->conf, CONF_scroll_on_disp);
1373 term->scroll_on_key = conf_get_int(term->conf, CONF_scroll_on_key);
1374 term->xterm_256_colour = conf_get_int(term->conf, CONF_xterm_256_colour);
1377 * Parse the control-character escapes in the configured
1378 * answerback string.
1381 char *answerback = conf_get_str(term->conf, CONF_answerback);
1382 int maxlen = strlen(answerback);
1384 term->answerback = snewn(maxlen, char);
1385 term->answerbacklen = 0;
1387 while (*answerback) {
1389 char c = ctrlparse(answerback, &n);
1391 term->answerback[term->answerbacklen++] = c;
1394 term->answerback[term->answerbacklen++] = *answerback++;
1401 * When the user reconfigures us, we need to check the forbidden-
1402 * alternate-screen config option, disable raw mouse mode if the
1403 * user has disabled mouse reporting, and abandon a print job if
1404 * the user has disabled printing.
1406 void term_reconfig(Terminal *term, Conf *conf)
1409 * Before adopting the new config, check all those terminal
1410 * settings which control power-on defaults; and if they've
1411 * changed, we will modify the current state as well as the
1412 * default one. The full list is: Auto wrap mode, DEC Origin
1413 * Mode, BCE, blinking text, character classes.
1415 int reset_wrap, reset_decom, reset_bce, reset_tblink, reset_charclass;
1418 reset_wrap = (conf_get_int(term->conf, CONF_wrap_mode) !=
1419 conf_get_int(conf, CONF_wrap_mode));
1420 reset_decom = (conf_get_int(term->conf, CONF_dec_om) !=
1421 conf_get_int(conf, CONF_dec_om));
1422 reset_bce = (conf_get_int(term->conf, CONF_bce) !=
1423 conf_get_int(conf, CONF_bce));
1424 reset_tblink = (conf_get_int(term->conf, CONF_blinktext) !=
1425 conf_get_int(conf, CONF_blinktext));
1426 reset_charclass = 0;
1427 for (i = 0; i < 256; i++)
1428 if (conf_get_int_int(term->conf, CONF_wordness, i) !=
1429 conf_get_int_int(conf, CONF_wordness, i))
1430 reset_charclass = 1;
1433 * If the bidi or shaping settings have changed, flush the bidi
1436 if (conf_get_int(term->conf, CONF_arabicshaping) !=
1437 conf_get_int(conf, CONF_arabicshaping) ||
1438 conf_get_int(term->conf, CONF_bidi) !=
1439 conf_get_int(conf, CONF_bidi)) {
1440 for (i = 0; i < term->bidi_cache_size; i++) {
1441 sfree(term->pre_bidi_cache[i].chars);
1442 sfree(term->post_bidi_cache[i].chars);
1443 term->pre_bidi_cache[i].width = -1;
1444 term->pre_bidi_cache[i].chars = NULL;
1445 term->post_bidi_cache[i].width = -1;
1446 term->post_bidi_cache[i].chars = NULL;
1450 conf_free(term->conf);
1451 term->conf = conf_copy(conf);
1454 term->alt_wrap = term->wrap = conf_get_int(term->conf, CONF_wrap_mode);
1456 term->alt_om = term->dec_om = conf_get_int(term->conf, CONF_dec_om);
1458 term->use_bce = conf_get_int(term->conf, CONF_bce);
1459 set_erase_char(term);
1462 term->blink_is_real = conf_get_int(term->conf, CONF_blinktext);
1464 if (reset_charclass)
1465 for (i = 0; i < 256; i++)
1466 term->wordness[i] = conf_get_int_int(term->conf, CONF_wordness, i);
1468 if (conf_get_int(term->conf, CONF_no_alt_screen))
1469 swap_screen(term, 0, FALSE, FALSE);
1470 if (conf_get_int(term->conf, CONF_no_mouse_rep)) {
1471 term->xterm_mouse = 0;
1472 set_raw_mouse_mode(term->frontend, 0);
1474 if (conf_get_int(term->conf, CONF_no_remote_charset)) {
1475 term->cset_attr[0] = term->cset_attr[1] = CSET_ASCII;
1476 term->sco_acs = term->alt_sco_acs = 0;
1479 if (!conf_get_str(term->conf, CONF_printer)) {
1480 term_print_finish(term);
1482 term_schedule_tblink(term);
1483 term_schedule_cblink(term);
1484 term_copy_stuff_from_conf(term);
1488 * Clear the scrollback.
1490 void term_clrsb(Terminal *term)
1492 unsigned char *line;
1494 while ((line = delpos234(term->scrollback, 0)) != NULL) {
1495 sfree(line); /* this is compressed data, not a termline */
1497 term->tempsblines = 0;
1498 term->alt_sblines = 0;
1503 * Initialise the terminal.
1505 Terminal *term_init(Conf *myconf, struct unicode_data *ucsdata,
1511 * Allocate a new Terminal structure and initialise the fields
1514 term = snew(Terminal);
1515 term->frontend = frontend;
1516 term->ucsdata = ucsdata;
1517 term->conf = conf_copy(myconf);
1518 term->logctx = NULL;
1519 term->compatibility_level = TM_PUTTY;
1520 strcpy(term->id_string, "\033[?6c");
1521 term->cblink_pending = term->tblink_pending = FALSE;
1522 term->paste_buffer = NULL;
1523 term->paste_len = 0;
1524 term->last_paste = 0;
1525 bufchain_init(&term->inbuf);
1526 bufchain_init(&term->printer_buf);
1527 term->printing = term->only_printing = FALSE;
1528 term->print_job = NULL;
1529 term->vt52_mode = FALSE;
1530 term->cr_lf_return = FALSE;
1531 term->seen_disp_event = FALSE;
1532 term->mouse_is_down = FALSE;
1533 term->reset_132 = FALSE;
1534 term->cblinker = term->tblinker = 0;
1535 term->has_focus = 1;
1536 term->repeat_off = FALSE;
1537 term->termstate = TOPLEVEL;
1538 term->selstate = NO_SELECTION;
1541 term_copy_stuff_from_conf(term);
1543 term->screen = term->alt_screen = term->scrollback = NULL;
1544 term->tempsblines = 0;
1545 term->alt_sblines = 0;
1547 term->disptext = NULL;
1548 term->dispcursx = term->dispcursy = -1;
1551 term->rows = term->cols = -1;
1552 power_on(term, TRUE);
1553 term->beephead = term->beeptail = NULL;
1554 #ifdef OPTIMISE_SCROLL
1555 term->scrollhead = term->scrolltail = NULL;
1556 #endif /* OPTIMISE_SCROLL */
1558 term->lastbeep = FALSE;
1559 term->beep_overloaded = FALSE;
1560 term->attr_mask = 0xffffffff;
1561 term->resize_fn = NULL;
1562 term->resize_ctx = NULL;
1563 term->in_term_out = FALSE;
1565 term->ltemp_size = 0;
1566 term->wcFrom = NULL;
1568 term->wcFromTo_size = 0;
1570 term->window_update_pending = FALSE;
1572 term->bidi_cache_size = 0;
1573 term->pre_bidi_cache = term->post_bidi_cache = NULL;
1576 term->basic_erase_char.chr = CSET_ASCII | ' ';
1577 term->basic_erase_char.attr = ATTR_DEFAULT;
1578 term->basic_erase_char.cc_next = 0;
1579 term->erase_char = term->basic_erase_char;
1584 void term_free(Terminal *term)
1587 struct beeptime *beep;
1590 while ((line = delpos234(term->scrollback, 0)) != NULL)
1591 sfree(line); /* compressed data, not a termline */
1592 freetree234(term->scrollback);
1593 while ((line = delpos234(term->screen, 0)) != NULL)
1595 freetree234(term->screen);
1596 while ((line = delpos234(term->alt_screen, 0)) != NULL)
1598 freetree234(term->alt_screen);
1599 if (term->disptext) {
1600 for (i = 0; i < term->rows; i++)
1601 freeline(term->disptext[i]);
1603 sfree(term->disptext);
1604 while (term->beephead) {
1605 beep = term->beephead;
1606 term->beephead = beep->next;
1609 bufchain_clear(&term->inbuf);
1611 printer_finish_job(term->print_job);
1612 bufchain_clear(&term->printer_buf);
1613 sfree(term->paste_buffer);
1615 sfree(term->wcFrom);
1618 for (i = 0; i < term->bidi_cache_size; i++) {
1619 sfree(term->pre_bidi_cache[i].chars);
1620 sfree(term->post_bidi_cache[i].chars);
1622 sfree(term->pre_bidi_cache);
1623 sfree(term->post_bidi_cache);
1625 expire_timer_context(term);
1627 conf_free(term->conf);
1633 * Set up the terminal for a given size.
1635 void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
1638 termline **newdisp, *line;
1639 int i, j, oldrows = term->rows;
1641 int save_alt_which = term->alt_which;
1643 if (newrows == term->rows && newcols == term->cols &&
1644 newsavelines == term->savelines)
1645 return; /* nothing to do */
1647 /* Behave sensibly if we're given zero (or negative) rows/cols */
1649 if (newrows < 1) newrows = 1;
1650 if (newcols < 1) newcols = 1;
1653 swap_screen(term, 0, FALSE, FALSE);
1655 term->alt_t = term->marg_t = 0;
1656 term->alt_b = term->marg_b = newrows - 1;
1658 if (term->rows == -1) {
1659 term->scrollback = newtree234(NULL);
1660 term->screen = newtree234(NULL);
1661 term->tempsblines = 0;
1666 * Resize the screen and scrollback. We only need to shift
1667 * lines around within our data structures, because lineptr()
1668 * will take care of resizing each individual line if
1671 * - If the new screen is longer, we shunt lines in from temporary
1672 * scrollback if possible, otherwise we add new blank lines at
1675 * - If the new screen is shorter, we remove any blank lines at
1676 * the bottom if possible, otherwise shunt lines above the cursor
1677 * to scrollback if possible, otherwise delete lines below the
1680 * - Then, if the new scrollback length is less than the
1681 * amount of scrollback we actually have, we must throw some
1684 sblen = count234(term->scrollback);
1685 /* Do this loop to expand the screen if newrows > rows */
1686 assert(term->rows == count234(term->screen));
1687 while (term->rows < newrows) {
1688 if (term->tempsblines > 0) {
1689 unsigned char *cline;
1690 /* Insert a line from the scrollback at the top of the screen. */
1691 assert(sblen >= term->tempsblines);
1692 cline = delpos234(term->scrollback, --sblen);
1693 line = decompressline(cline, NULL);
1695 line->temporary = FALSE; /* reconstituted line is now real */
1696 term->tempsblines -= 1;
1697 addpos234(term->screen, line, 0);
1699 term->savecurs.y += 1;
1701 term->alt_savecurs.y += 1;
1703 /* Add a new blank line at the bottom of the screen. */
1704 line = newline(term, newcols, FALSE);
1705 addpos234(term->screen, line, count234(term->screen));
1709 /* Do this loop to shrink the screen if newrows < rows */
1710 while (term->rows > newrows) {
1711 if (term->curs.y < term->rows - 1) {
1712 /* delete bottom row, unless it contains the cursor */
1713 sfree(delpos234(term->screen, term->rows - 1));
1715 /* push top row to scrollback */
1716 line = delpos234(term->screen, 0);
1717 addpos234(term->scrollback, compressline(line), sblen++);
1719 term->tempsblines += 1;
1721 term->savecurs.y -= 1;
1723 term->alt_savecurs.y -= 1;
1727 assert(term->rows == newrows);
1728 assert(count234(term->screen) == newrows);
1730 /* Delete any excess lines from the scrollback. */
1731 while (sblen > newsavelines) {
1732 line = delpos234(term->scrollback, 0);
1736 if (sblen < term->tempsblines)
1737 term->tempsblines = sblen;
1738 assert(count234(term->scrollback) <= newsavelines);
1739 assert(count234(term->scrollback) >= term->tempsblines);
1742 /* Make a new displayed text buffer. */
1743 newdisp = snewn(newrows, termline *);
1744 for (i = 0; i < newrows; i++) {
1745 newdisp[i] = newline(term, newcols, FALSE);
1746 for (j = 0; j < newcols; j++)
1747 newdisp[i]->chars[j].attr = ATTR_INVALID;
1749 if (term->disptext) {
1750 for (i = 0; i < oldrows; i++)
1751 freeline(term->disptext[i]);
1753 sfree(term->disptext);
1754 term->disptext = newdisp;
1755 term->dispcursx = term->dispcursy = -1;
1757 /* Make a new alternate screen. */
1758 newalt = newtree234(NULL);
1759 for (i = 0; i < newrows; i++) {
1760 line = newline(term, newcols, TRUE);
1761 addpos234(newalt, line, i);
1763 if (term->alt_screen) {
1764 while (NULL != (line = delpos234(term->alt_screen, 0)))
1766 freetree234(term->alt_screen);
1768 term->alt_screen = newalt;
1769 term->alt_sblines = 0;
1771 term->tabs = sresize(term->tabs, newcols, unsigned char);
1774 for (i = (term->cols > 0 ? term->cols : 0); i < newcols; i++)
1775 term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
1778 /* Check that the cursor positions are still valid. */
1779 if (term->savecurs.y < 0)
1780 term->savecurs.y = 0;
1781 if (term->savecurs.y >= newrows)
1782 term->savecurs.y = newrows - 1;
1783 if (term->savecurs.x >= newcols)
1784 term->savecurs.x = newcols - 1;
1785 if (term->alt_savecurs.y < 0)
1786 term->alt_savecurs.y = 0;
1787 if (term->alt_savecurs.y >= newrows)
1788 term->alt_savecurs.y = newrows - 1;
1789 if (term->alt_savecurs.x >= newcols)
1790 term->alt_savecurs.x = newcols - 1;
1791 if (term->curs.y < 0)
1793 if (term->curs.y >= newrows)
1794 term->curs.y = newrows - 1;
1795 if (term->curs.x >= newcols)
1796 term->curs.x = newcols - 1;
1797 if (term->alt_y < 0)
1799 if (term->alt_y >= newrows)
1800 term->alt_y = newrows - 1;
1801 if (term->alt_x >= newcols)
1802 term->alt_x = newcols - 1;
1803 term->alt_x = term->alt_y = 0;
1804 term->wrapnext = term->alt_wnext = FALSE;
1806 term->rows = newrows;
1807 term->cols = newcols;
1808 term->savelines = newsavelines;
1810 swap_screen(term, save_alt_which, FALSE, FALSE);
1814 if (term->resize_fn)
1815 term->resize_fn(term->resize_ctx, term->cols, term->rows);
1819 * Hand a function and context pointer to the terminal which it can
1820 * use to notify a back end of resizes.
1822 void term_provide_resize_fn(Terminal *term,
1823 void (*resize_fn)(void *, int, int),
1826 term->resize_fn = resize_fn;
1827 term->resize_ctx = resize_ctx;
1828 if (resize_fn && term->cols > 0 && term->rows > 0)
1829 resize_fn(resize_ctx, term->cols, term->rows);
1832 /* Find the bottom line on the screen that has any content.
1833 * If only the top line has content, returns 0.
1834 * If no lines have content, return -1.
1836 static int find_last_nonempty_line(Terminal * term, tree234 * screen)
1839 for (i = count234(screen) - 1; i >= 0; i--) {
1840 termline *line = index234(screen, i);
1842 for (j = 0; j < line->cols; j++)
1843 if (!termchars_equal(&line->chars[j], &term->erase_char))
1845 if (j != line->cols) break;
1851 * Swap screens. If `reset' is TRUE and we have been asked to
1852 * switch to the alternate screen, we must bring most of its
1853 * configuration from the main screen and erase the contents of the
1854 * alternate screen completely. (This is even true if we're already
1855 * on it! Blame xterm.)
1857 static void swap_screen(Terminal *term, int which, int reset, int keep_cur_pos)
1864 reset = FALSE; /* do no weird resetting if which==0 */
1866 if (which != term->alt_which) {
1867 term->alt_which = which;
1869 ttr = term->alt_screen;
1870 term->alt_screen = term->screen;
1872 term->alt_sblines = find_last_nonempty_line(term, term->alt_screen) + 1;
1874 if (!reset && !keep_cur_pos)
1875 term->curs.x = term->alt_x;
1878 if (!reset && !keep_cur_pos)
1879 term->curs.y = term->alt_y;
1882 if (!reset) term->marg_t = term->alt_t;
1885 if (!reset) term->marg_b = term->alt_b;
1888 if (!reset) term->dec_om = term->alt_om;
1891 if (!reset) term->wrap = term->alt_wrap;
1894 if (!reset) term->wrapnext = term->alt_wnext;
1895 term->alt_wnext = t;
1897 if (!reset) term->insert = term->alt_ins;
1900 if (!reset) term->cset = term->alt_cset;
1903 if (!reset) term->utf = term->alt_utf;
1906 if (!reset) term->sco_acs = term->alt_sco_acs;
1907 term->alt_sco_acs = t;
1909 tp = term->savecurs;
1910 if (!reset && !keep_cur_pos)
1911 term->savecurs = term->alt_savecurs;
1912 term->alt_savecurs = tp;
1913 t = term->save_cset;
1914 if (!reset && !keep_cur_pos)
1915 term->save_cset = term->alt_save_cset;
1916 term->alt_save_cset = t;
1917 t = term->save_csattr;
1918 if (!reset && !keep_cur_pos)
1919 term->save_csattr = term->alt_save_csattr;
1920 term->alt_save_csattr = t;
1921 t = term->save_attr;
1922 if (!reset && !keep_cur_pos)
1923 term->save_attr = term->alt_save_attr;
1924 term->alt_save_attr = t;
1926 if (!reset && !keep_cur_pos)
1927 term->save_utf = term->alt_save_utf;
1928 term->alt_save_utf = t;
1929 t = term->save_wnext;
1930 if (!reset && !keep_cur_pos)
1931 term->save_wnext = term->alt_save_wnext;
1932 term->alt_save_wnext = t;
1933 t = term->save_sco_acs;
1934 if (!reset && !keep_cur_pos)
1935 term->save_sco_acs = term->alt_save_sco_acs;
1936 term->alt_save_sco_acs = t;
1939 if (reset && term->screen) {
1941 * Yes, this _is_ supposed to honour background-colour-erase.
1943 erase_lots(term, FALSE, TRUE, TRUE);
1948 * Update the scroll bar.
1950 static void update_sbar(Terminal *term)
1952 int nscroll = sblines(term);
1953 set_sbar(term->frontend, nscroll + term->rows,
1954 nscroll + term->disptop, term->rows);
1958 * Check whether the region bounded by the two pointers intersects
1959 * the scroll region, and de-select the on-screen selection if so.
1961 static void check_selection(Terminal *term, pos from, pos to)
1963 if (poslt(from, term->selend) && poslt(term->selstart, to))
1968 * Scroll the screen. (`lines' is +ve for scrolling forward, -ve
1969 * for backward.) `sb' is TRUE if the scrolling is permitted to
1970 * affect the scrollback buffer.
1972 static void scroll(Terminal *term, int topline, int botline, int lines, int sb)
1976 #ifdef OPTIMISE_SCROLL
1977 int olddisptop, shift;
1978 #endif /* OPTIMISE_SCROLL */
1980 if (topline != 0 || term->alt_which != 0)
1983 #ifdef OPTIMISE_SCROLL
1984 olddisptop = term->disptop;
1986 #endif /* OPTIMISE_SCROLL */
1989 line = delpos234(term->screen, botline);
1990 resizeline(term, line, term->cols);
1991 for (i = 0; i < term->cols; i++)
1992 copy_termchar(line, i, &term->erase_char);
1993 line->lattr = LATTR_NORM;
1994 addpos234(term->screen, line, topline);
1996 if (term->selstart.y >= topline && term->selstart.y <= botline) {
1998 if (term->selstart.y > botline) {
1999 term->selstart.y = botline + 1;
2000 term->selstart.x = 0;
2003 if (term->selend.y >= topline && term->selend.y <= botline) {
2005 if (term->selend.y > botline) {
2006 term->selend.y = botline + 1;
2015 line = delpos234(term->screen, topline);
2016 #ifdef TERM_CC_DIAGS
2019 if (sb && term->savelines > 0) {
2020 int sblen = count234(term->scrollback);
2022 * We must add this line to the scrollback. We'll
2023 * remove a line from the top of the scrollback if
2024 * the scrollback is full.
2026 if (sblen == term->savelines) {
2027 unsigned char *cline;
2030 cline = delpos234(term->scrollback, 0);
2033 term->tempsblines += 1;
2035 addpos234(term->scrollback, compressline(line), sblen);
2037 /* now `line' itself can be reused as the bottom line */
2040 * If the user is currently looking at part of the
2041 * scrollback, and they haven't enabled any options
2042 * that are going to reset the scrollback as a
2043 * result of this movement, then the chances are
2044 * they'd like to keep looking at the same line. So
2045 * we move their viewpoint at the same rate as the
2046 * scroll, at least until their viewpoint hits the
2047 * top end of the scrollback buffer, at which point
2048 * we don't have the choice any more.
2050 * Thanks to Jan Holmen Holsten for the idea and
2051 * initial implementation.
2053 if (term->disptop > -term->savelines && term->disptop < 0)
2056 resizeline(term, line, term->cols);
2057 for (i = 0; i < term->cols; i++)
2058 copy_termchar(line, i, &term->erase_char);
2059 line->lattr = LATTR_NORM;
2060 addpos234(term->screen, line, botline);
2063 * If the selection endpoints move into the scrollback,
2064 * we keep them moving until they hit the top. However,
2065 * of course, if the line _hasn't_ moved into the
2066 * scrollback then we don't do this, and cut them off
2067 * at the top of the scroll region.
2069 * This applies to selstart and selend (for an existing
2070 * selection), and also selanchor (for one being
2071 * selected as we speak).
2073 seltop = sb ? -term->savelines : topline;
2075 if (term->selstate != NO_SELECTION) {
2076 if (term->selstart.y >= seltop &&
2077 term->selstart.y <= botline) {
2079 if (term->selstart.y < seltop) {
2080 term->selstart.y = seltop;
2081 term->selstart.x = 0;
2084 if (term->selend.y >= seltop && term->selend.y <= botline) {
2086 if (term->selend.y < seltop) {
2087 term->selend.y = seltop;
2091 if (term->selanchor.y >= seltop &&
2092 term->selanchor.y <= botline) {
2093 term->selanchor.y--;
2094 if (term->selanchor.y < seltop) {
2095 term->selanchor.y = seltop;
2096 term->selanchor.x = 0;
2104 #ifdef OPTIMISE_SCROLL
2105 shift += term->disptop - olddisptop;
2106 if (shift < term->rows && shift > -term->rows && shift != 0)
2107 scroll_display(term, topline, botline, shift);
2108 #endif /* OPTIMISE_SCROLL */
2111 #ifdef OPTIMISE_SCROLL
2113 * Add a scroll of a region on the screen into the pending scroll list.
2114 * `lines' is +ve for scrolling forward, -ve for backward.
2116 * If the scroll is on the same area as the last scroll in the list,
2119 static void save_scroll(Terminal *term, int topline, int botline, int lines)
2121 struct scrollregion *newscroll;
2122 if (term->scrolltail &&
2123 term->scrolltail->topline == topline &&
2124 term->scrolltail->botline == botline) {
2125 term->scrolltail->lines += lines;
2127 newscroll = snew(struct scrollregion);
2128 newscroll->topline = topline;
2129 newscroll->botline = botline;
2130 newscroll->lines = lines;
2131 newscroll->next = NULL;
2133 if (!term->scrollhead)
2134 term->scrollhead = newscroll;
2136 term->scrolltail->next = newscroll;
2137 term->scrolltail = newscroll;
2142 * Scroll the physical display, and our conception of it in disptext.
2144 static void scroll_display(Terminal *term, int topline, int botline, int lines)
2146 int distance, nlines, i, j;
2148 distance = lines > 0 ? lines : -lines;
2149 nlines = botline - topline + 1 - distance;
2151 for (i = 0; i < nlines; i++)
2152 for (j = 0; j < term->cols; j++)
2153 copy_termchar(term->disptext[i], j,
2154 term->disptext[i+distance]->chars+j);
2155 if (term->dispcursy >= 0 &&
2156 term->dispcursy >= topline + distance &&
2157 term->dispcursy < topline + distance + nlines)
2158 term->dispcursy -= distance;
2159 for (i = 0; i < distance; i++)
2160 for (j = 0; j < term->cols; j++)
2161 term->disptext[nlines+i]->chars[j].attr |= ATTR_INVALID;
2163 for (i = nlines; i-- ;)
2164 for (j = 0; j < term->cols; j++)
2165 copy_termchar(term->disptext[i+distance], j,
2166 term->disptext[i]->chars+j);
2167 if (term->dispcursy >= 0 &&
2168 term->dispcursy >= topline &&
2169 term->dispcursy < topline + nlines)
2170 term->dispcursy += distance;
2171 for (i = 0; i < distance; i++)
2172 for (j = 0; j < term->cols; j++)
2173 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
2175 save_scroll(term, topline, botline, lines);
2177 #endif /* OPTIMISE_SCROLL */
2180 * Move the cursor to a given position, clipping at boundaries. We
2181 * may or may not want to clip at the scroll margin: marg_clip is 0
2182 * not to, 1 to disallow _passing_ the margins, and 2 to disallow
2183 * even _being_ outside the margins.
2185 static void move(Terminal *term, int x, int y, int marg_clip)
2189 if (x >= term->cols)
2192 if ((term->curs.y >= term->marg_t || marg_clip == 2) &&
2195 if ((term->curs.y <= term->marg_b || marg_clip == 2) &&
2201 if (y >= term->rows)
2205 term->wrapnext = FALSE;
2209 * Save or restore the cursor and SGR mode.
2211 static void save_cursor(Terminal *term, int save)
2214 term->savecurs = term->curs;
2215 term->save_attr = term->curr_attr;
2216 term->save_cset = term->cset;
2217 term->save_utf = term->utf;
2218 term->save_wnext = term->wrapnext;
2219 term->save_csattr = term->cset_attr[term->cset];
2220 term->save_sco_acs = term->sco_acs;
2222 term->curs = term->savecurs;
2223 /* Make sure the window hasn't shrunk since the save */
2224 if (term->curs.x >= term->cols)
2225 term->curs.x = term->cols - 1;
2226 if (term->curs.y >= term->rows)
2227 term->curs.y = term->rows - 1;
2229 term->curr_attr = term->save_attr;
2230 term->cset = term->save_cset;
2231 term->utf = term->save_utf;
2232 term->wrapnext = term->save_wnext;
2234 * wrapnext might reset to False if the x position is no
2235 * longer at the rightmost edge.
2237 if (term->wrapnext && term->curs.x < term->cols-1)
2238 term->wrapnext = FALSE;
2239 term->cset_attr[term->cset] = term->save_csattr;
2240 term->sco_acs = term->save_sco_acs;
2241 set_erase_char(term);
2246 * This function is called before doing _anything_ which affects
2247 * only part of a line of text. It is used to mark the boundary
2248 * between two character positions, and it indicates that some sort
2249 * of effect is going to happen on only one side of that boundary.
2251 * The effect of this function is to check whether a CJK
2252 * double-width character is straddling the boundary, and to remove
2253 * it and replace it with two spaces if so. (Of course, one or
2254 * other of those spaces is then likely to be replaced with
2255 * something else again, as a result of whatever happens next.)
2257 * Also, if the boundary is at the right-hand _edge_ of the screen,
2258 * it implies something deliberate is being done to the rightmost
2259 * column position; hence we must clear LATTR_WRAPPED2.
2261 * The input to the function is the coordinates of the _second_
2262 * character of the pair.
2264 static void check_boundary(Terminal *term, int x, int y)
2268 /* Validate input coordinates, just in case. */
2269 if (x == 0 || x > term->cols)
2272 ldata = scrlineptr(y);
2273 if (x == term->cols) {
2274 ldata->lattr &= ~LATTR_WRAPPED2;
2276 if (ldata->chars[x].chr == UCSWIDE) {
2277 clear_cc(ldata, x-1);
2279 ldata->chars[x-1].chr = ' ' | CSET_ASCII;
2280 ldata->chars[x] = ldata->chars[x-1];
2286 * Erase a large portion of the screen: the whole screen, or the
2287 * whole line, or parts thereof.
2289 static void erase_lots(Terminal *term,
2290 int line_only, int from_begin, int to_end)
2294 int erasing_lines_from_top = 0;
2297 start.y = term->curs.y;
2299 end.y = term->curs.y + 1;
2301 erase_lattr = FALSE;
2316 if (!from_begin || !to_end)
2317 check_boundary(term, term->curs.x, term->curs.y);
2318 check_selection(term, start, end);
2320 /* Clear screen also forces a full window redraw, just in case. */
2321 if (start.y == 0 && start.x == 0 && end.y == term->rows)
2322 term_invalidate(term);
2324 /* Lines scrolled away shouldn't be brought back on if the terminal
2326 if (start.y == 0 && start.x == 0 && end.x == 0 && erase_lattr)
2327 erasing_lines_from_top = 1;
2329 if (term->erase_to_scrollback && erasing_lines_from_top) {
2330 /* If it's a whole number of lines, starting at the top, and
2331 * we're fully erasing them, erase by scrolling and keep the
2332 * lines in the scrollback. */
2333 int scrolllines = end.y;
2334 if (end.y == term->rows) {
2335 /* Shrink until we find a non-empty row.*/
2336 scrolllines = find_last_nonempty_line(term, term->screen) + 1;
2338 if (scrolllines > 0)
2339 scroll(term, 0, scrolllines - 1, scrolllines, TRUE);
2341 termline *ldata = scrlineptr(start.y);
2342 while (poslt(start, end)) {
2343 if (start.x == term->cols) {
2345 ldata->lattr &= ~(LATTR_WRAPPED | LATTR_WRAPPED2);
2347 ldata->lattr = LATTR_NORM;
2349 copy_termchar(ldata, start.x, &term->erase_char);
2351 if (incpos(start) && start.y < term->rows) {
2352 ldata = scrlineptr(start.y);
2357 /* After an erase of lines from the top of the screen, we shouldn't
2358 * bring the lines back again if the terminal enlarges (since the user or
2359 * application has explictly thrown them away). */
2360 if (erasing_lines_from_top && !(term->alt_which))
2361 term->tempsblines = 0;
2365 * Insert or delete characters within the current line. n is +ve if
2366 * insertion is desired, and -ve for deletion.
2368 static void insch(Terminal *term, int n)
2370 int dir = (n < 0 ? -1 : +1);
2375 n = (n < 0 ? -n : n);
2376 if (n > term->cols - term->curs.x)
2377 n = term->cols - term->curs.x;
2378 m = term->cols - term->curs.x - n;
2379 cursplus.y = term->curs.y;
2380 cursplus.x = term->curs.x + n;
2381 check_selection(term, term->curs, cursplus);
2382 check_boundary(term, term->curs.x, term->curs.y);
2384 check_boundary(term, term->curs.x + n, term->curs.y);
2385 ldata = scrlineptr(term->curs.y);
2387 for (j = 0; j < m; j++)
2388 move_termchar(ldata,
2389 ldata->chars + term->curs.x + j,
2390 ldata->chars + term->curs.x + j + n);
2392 copy_termchar(ldata, term->curs.x + m++, &term->erase_char);
2395 move_termchar(ldata,
2396 ldata->chars + term->curs.x + j + n,
2397 ldata->chars + term->curs.x + j);
2399 copy_termchar(ldata, term->curs.x + n, &term->erase_char);
2404 * Toggle terminal mode `mode' to state `state'. (`query' indicates
2405 * whether the mode is a DEC private one or a normal one.)
2407 static void toggle_mode(Terminal *term, int mode, int query, int state)
2411 case 1: /* DECCKM: application cursor keys */
2412 term->app_cursor_keys = state;
2414 case 2: /* DECANM: VT52 mode */
2415 term->vt52_mode = !state;
2416 if (term->vt52_mode) {
2417 term->blink_is_real = FALSE;
2418 term->vt52_bold = FALSE;
2420 term->blink_is_real = term->blinktext;
2422 term_schedule_tblink(term);
2424 case 3: /* DECCOLM: 80/132 columns */
2426 if (!term->no_remote_resize)
2427 request_resize(term->frontend, state ? 132 : 80, term->rows);
2428 term->reset_132 = state;
2429 term->alt_t = term->marg_t = 0;
2430 term->alt_b = term->marg_b = term->rows - 1;
2431 move(term, 0, 0, 0);
2432 erase_lots(term, FALSE, TRUE, TRUE);
2434 case 5: /* DECSCNM: reverse video */
2436 * Toggle reverse video. If we receive an OFF within the
2437 * visual bell timeout period after an ON, we trigger an
2438 * effective visual bell, so that ESC[?5hESC[?5l will
2439 * always be an actually _visible_ visual bell.
2441 if (term->rvideo && !state) {
2442 /* This is an OFF, so set up a vbell */
2443 term_schedule_vbell(term, TRUE, term->rvbell_startpoint);
2444 } else if (!term->rvideo && state) {
2445 /* This is an ON, so we notice the time and save it. */
2446 term->rvbell_startpoint = GETTICKCOUNT();
2448 term->rvideo = state;
2449 seen_disp_event(term);
2451 case 6: /* DECOM: DEC origin mode */
2452 term->dec_om = state;
2454 case 7: /* DECAWM: auto wrap */
2457 case 8: /* DECARM: auto key repeat */
2458 term->repeat_off = !state;
2460 case 10: /* DECEDM: set local edit mode */
2461 term->term_editing = state;
2462 if (term->ldisc) /* cause ldisc to notice changes */
2463 ldisc_send(term->ldisc, NULL, 0, 0);
2465 case 25: /* DECTCEM: enable/disable cursor */
2466 compatibility2(OTHER, VT220);
2467 term->cursor_on = state;
2468 seen_disp_event(term);
2470 case 47: /* alternate screen */
2471 compatibility(OTHER);
2473 swap_screen(term, term->no_alt_screen ? 0 : state, FALSE, FALSE);
2476 case 1000: /* xterm mouse 1 (normal) */
2477 term->xterm_mouse = state ? 1 : 0;
2478 set_raw_mouse_mode(term->frontend, state);
2480 case 1002: /* xterm mouse 2 (inc. button drags) */
2481 term->xterm_mouse = state ? 2 : 0;
2482 set_raw_mouse_mode(term->frontend, state);
2484 case 1047: /* alternate screen */
2485 compatibility(OTHER);
2487 swap_screen(term, term->no_alt_screen ? 0 : state, TRUE, TRUE);
2490 case 1048: /* save/restore cursor */
2491 if (!term->no_alt_screen)
2492 save_cursor(term, state);
2493 if (!state) seen_disp_event(term);
2495 case 1049: /* cursor & alternate screen */
2496 if (state && !term->no_alt_screen)
2497 save_cursor(term, state);
2498 if (!state) seen_disp_event(term);
2499 compatibility(OTHER);
2501 swap_screen(term, term->no_alt_screen ? 0 : state, TRUE, FALSE);
2502 if (!state && !term->no_alt_screen)
2503 save_cursor(term, state);
2508 case 4: /* IRM: set insert mode */
2509 compatibility(VT102);
2510 term->insert = state;
2512 case 12: /* SRM: set echo mode */
2513 term->term_echoing = !state;
2514 if (term->ldisc) /* cause ldisc to notice changes */
2515 ldisc_send(term->ldisc, NULL, 0, 0);
2517 case 20: /* LNM: Return sends ... */
2518 term->cr_lf_return = state;
2520 case 34: /* WYULCURM: Make cursor BIG */
2521 compatibility2(OTHER, VT220);
2522 term->big_cursor = !state;
2527 * Process an OSC sequence: set window title or icon name.
2529 static void do_osc(Terminal *term)
2532 while (term->osc_strlen--)
2533 term->wordness[(unsigned char)
2534 term->osc_string[term->osc_strlen]] = term->esc_args[0];
2536 term->osc_string[term->osc_strlen] = '\0';
2537 switch (term->esc_args[0]) {
2540 if (!term->no_remote_wintitle)
2541 set_icon(term->frontend, term->osc_string);
2542 if (term->esc_args[0] == 1)
2544 /* fall through: parameter 0 means set both */
2547 if (!term->no_remote_wintitle)
2548 set_title(term->frontend, term->osc_string);
2555 * ANSI printing routines.
2557 static void term_print_setup(Terminal *term, char *printer)
2559 bufchain_clear(&term->printer_buf);
2560 term->print_job = printer_start_job(printer);
2562 static void term_print_flush(Terminal *term)
2567 while ((size = bufchain_size(&term->printer_buf)) > 5) {
2568 bufchain_prefix(&term->printer_buf, &data, &len);
2571 printer_job_data(term->print_job, data, len);
2572 bufchain_consume(&term->printer_buf, len);
2575 static void term_print_finish(Terminal *term)
2581 if (!term->printing && !term->only_printing)
2582 return; /* we need do nothing */
2584 term_print_flush(term);
2585 while ((size = bufchain_size(&term->printer_buf)) > 0) {
2586 bufchain_prefix(&term->printer_buf, &data, &len);
2588 if (c == '\033' || c == '\233') {
2589 bufchain_consume(&term->printer_buf, size);
2592 printer_job_data(term->print_job, &c, 1);
2593 bufchain_consume(&term->printer_buf, 1);
2596 printer_finish_job(term->print_job);
2597 term->print_job = NULL;
2598 term->printing = term->only_printing = FALSE;
2602 * Remove everything currently in `inbuf' and stick it up on the
2603 * in-memory display. There's a big state machine in here to
2604 * process escape sequences...
2606 static void term_out(Terminal *term)
2610 unsigned char localbuf[256], *chars;
2615 chars = NULL; /* placate compiler warnings */
2616 while (nchars > 0 || unget != -1 || bufchain_size(&term->inbuf) > 0) {
2620 bufchain_prefix(&term->inbuf, &ret, &nchars);
2621 if (nchars > sizeof(localbuf))
2622 nchars = sizeof(localbuf);
2623 memcpy(localbuf, ret, nchars);
2624 bufchain_consume(&term->inbuf, nchars);
2626 assert(chars != NULL);
2632 * Optionally log the session traffic to a file. Useful for
2633 * debugging and possibly also useful for actual logging.
2635 if (term->logtype == LGTYP_DEBUG && term->logctx)
2636 logtraffic(term->logctx, (unsigned char) c, LGTYP_DEBUG);
2642 /* Note only VT220+ are 8-bit VT102 is seven bit, it shouldn't even
2643 * be able to display 8-bit characters, but I'll let that go 'cause
2648 * If we're printing, add the character to the printer
2651 if (term->printing) {
2652 bufchain_add(&term->printer_buf, &c, 1);
2655 * If we're in print-only mode, we use a much simpler
2656 * state machine designed only to recognise the ESC[4i
2657 * termination sequence.
2659 if (term->only_printing) {
2661 term->print_state = 1;
2662 else if (c == (unsigned char)'\233')
2663 term->print_state = 2;
2664 else if (c == '[' && term->print_state == 1)
2665 term->print_state = 2;
2666 else if (c == '4' && term->print_state == 2)
2667 term->print_state = 3;
2668 else if (c == 'i' && term->print_state == 3)
2669 term->print_state = 4;
2671 term->print_state = 0;
2672 if (term->print_state == 4) {
2673 term_print_finish(term);
2679 /* First see about all those translations. */
2680 if (term->termstate == TOPLEVEL) {
2682 switch (term->utf_state) {
2685 /* UTF-8 must be stateless so we ignore iso2022. */
2686 if (term->ucsdata->unitab_ctrl[c] != 0xFF)
2687 c = term->ucsdata->unitab_ctrl[c];
2688 else c = ((unsigned char)c) | CSET_ASCII;
2690 } else if ((c & 0xe0) == 0xc0) {
2691 term->utf_size = term->utf_state = 1;
2692 term->utf_char = (c & 0x1f);
2693 } else if ((c & 0xf0) == 0xe0) {
2694 term->utf_size = term->utf_state = 2;
2695 term->utf_char = (c & 0x0f);
2696 } else if ((c & 0xf8) == 0xf0) {
2697 term->utf_size = term->utf_state = 3;
2698 term->utf_char = (c & 0x07);
2699 } else if ((c & 0xfc) == 0xf8) {
2700 term->utf_size = term->utf_state = 4;
2701 term->utf_char = (c & 0x03);
2702 } else if ((c & 0xfe) == 0xfc) {
2703 term->utf_size = term->utf_state = 5;
2704 term->utf_char = (c & 0x01);
2715 if ((c & 0xC0) != 0x80) {
2718 term->utf_state = 0;
2721 term->utf_char = (term->utf_char << 6) | (c & 0x3f);
2722 if (--term->utf_state)
2727 /* Is somebody trying to be evil! */
2729 (c < 0x800 && term->utf_size >= 2) ||
2730 (c < 0x10000 && term->utf_size >= 3) ||
2731 (c < 0x200000 && term->utf_size >= 4) ||
2732 (c < 0x4000000 && term->utf_size >= 5))
2735 /* Unicode line separator and paragraph separator are CR-LF */
2736 if (c == 0x2028 || c == 0x2029)
2739 /* High controls are probably a Baaad idea too. */
2743 /* The UTF-16 surrogates are not nice either. */
2744 /* The standard give the option of decoding these:
2745 * I don't want to! */
2746 if (c >= 0xD800 && c < 0xE000)
2749 /* ISO 10646 characters now limited to UTF-16 range. */
2753 /* This is currently a TagPhobic application.. */
2754 if (c >= 0xE0000 && c <= 0xE007F)
2757 /* U+FEFF is best seen as a null. */
2760 /* But U+FFFE is an error. */
2761 if (c == 0xFFFE || c == 0xFFFF)
2766 /* Are we in the nasty ACS mode? Note: no sco in utf mode. */
2767 else if(term->sco_acs &&
2768 (c!='\033' && c!='\012' && c!='\015' && c!='\b'))
2770 if (term->sco_acs == 2) c |= 0x80;
2773 switch (term->cset_attr[term->cset]) {
2775 * Linedraw characters are different from 'ESC ( B'
2776 * only for a small range. For ones outside that
2777 * range, make sure we use the same font as well as
2778 * the same encoding.
2781 if (term->ucsdata->unitab_ctrl[c] != 0xFF)
2782 c = term->ucsdata->unitab_ctrl[c];
2784 c = ((unsigned char) c) | CSET_LINEDRW;
2788 /* If UK-ASCII, make the '#' a LineDraw Pound */
2790 c = '}' | CSET_LINEDRW;
2793 /*FALLTHROUGH*/ case CSET_ASCII:
2794 if (term->ucsdata->unitab_ctrl[c] != 0xFF)
2795 c = term->ucsdata->unitab_ctrl[c];
2797 c = ((unsigned char) c) | CSET_ASCII;
2800 if (c>=' ') c = ((unsigned char)c) | CSET_SCOACS;
2807 * How about C1 controls?
2808 * Explicitly ignore SCI (0x9a), which we don't translate to DECID.
2810 if ((c & -32) == 0x80 && term->termstate < DO_CTRLS &&
2811 !term->vt52_mode && has_compat(VT220)) {
2815 term->termstate = SEEN_ESC;
2816 term->esc_query = FALSE;
2817 c = '@' + (c & 0x1F);
2821 /* Or the GL control. */
2822 if (c == '\177' && term->termstate < DO_CTRLS && has_compat(OTHER)) {
2823 if (term->curs.x && !term->wrapnext)
2825 term->wrapnext = FALSE;
2826 /* destructive backspace might be disabled */
2827 if (!term->no_dbackspace) {
2828 check_boundary(term, term->curs.x, term->curs.y);
2829 check_boundary(term, term->curs.x+1, term->curs.y);
2830 copy_termchar(scrlineptr(term->curs.y),
2831 term->curs.x, &term->erase_char);
2834 /* Or normal C0 controls. */
2835 if ((c & ~0x1F) == 0 && term->termstate < DO_CTRLS) {
2837 case '\005': /* ENQ: terminal type query */
2839 * Strictly speaking this is VT100 but a VT100 defaults to
2840 * no response. Other terminals respond at their option.
2842 * Don't put a CR in the default string as this tends to
2843 * upset some weird software.
2845 compatibility(ANSIMIN);
2847 lpage_send(term->ldisc, DEFAULT_CODEPAGE,
2848 term->answerback, term->answerbacklen, 0);
2851 case '\007': /* BEL: Bell */
2853 struct beeptime *newbeep;
2854 unsigned long ticks;
2856 ticks = GETTICKCOUNT();
2858 if (!term->beep_overloaded) {
2859 newbeep = snew(struct beeptime);
2860 newbeep->ticks = ticks;
2861 newbeep->next = NULL;
2862 if (!term->beephead)
2863 term->beephead = newbeep;
2865 term->beeptail->next = newbeep;
2866 term->beeptail = newbeep;
2871 * Throw out any beeps that happened more than
2874 while (term->beephead &&
2875 term->beephead->ticks < ticks - term->bellovl_t) {
2876 struct beeptime *tmp = term->beephead;
2877 term->beephead = tmp->next;
2879 if (!term->beephead)
2880 term->beeptail = NULL;
2884 if (term->bellovl && term->beep_overloaded &&
2885 ticks - term->lastbeep >= (unsigned)term->bellovl_s) {
2887 * If we're currently overloaded and the
2888 * last beep was more than s seconds ago,
2889 * leave overload mode.
2891 term->beep_overloaded = FALSE;
2892 } else if (term->bellovl && !term->beep_overloaded &&
2893 term->nbeeps >= term->bellovl_n) {
2895 * Now, if we have n or more beeps
2896 * remaining in the queue, go into overload
2899 term->beep_overloaded = TRUE;
2901 term->lastbeep = ticks;
2904 * Perform an actual beep if we're not overloaded.
2906 if (!term->bellovl || !term->beep_overloaded) {
2907 do_beep(term->frontend, term->beep);
2909 if (term->beep == BELL_VISUAL) {
2910 term_schedule_vbell(term, FALSE, 0);
2913 seen_disp_event(term);
2916 case '\b': /* BS: Back space */
2917 if (term->curs.x == 0 &&
2918 (term->curs.y == 0 || term->wrap == 0))
2920 else if (term->curs.x == 0 && term->curs.y > 0)
2921 term->curs.x = term->cols - 1, term->curs.y--;
2922 else if (term->wrapnext)
2923 term->wrapnext = FALSE;
2926 seen_disp_event(term);
2928 case '\016': /* LS1: Locking-shift one */
2929 compatibility(VT100);
2932 case '\017': /* LS0: Locking-shift zero */
2933 compatibility(VT100);
2936 case '\033': /* ESC: Escape */
2937 if (term->vt52_mode)
2938 term->termstate = VT52_ESC;
2940 compatibility(ANSIMIN);
2941 term->termstate = SEEN_ESC;
2942 term->esc_query = FALSE;
2945 case '\015': /* CR: Carriage return */
2947 term->wrapnext = FALSE;
2948 seen_disp_event(term);
2949 term->paste_hold = 0;
2951 if (term->crhaslf) {
2952 if (term->curs.y == term->marg_b)
2953 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
2954 else if (term->curs.y < term->rows - 1)
2958 logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
2960 case '\014': /* FF: Form feed */
2961 if (has_compat(SCOANSI)) {
2962 move(term, 0, 0, 0);
2963 erase_lots(term, FALSE, FALSE, TRUE);
2965 term->wrapnext = FALSE;
2966 seen_disp_event(term);
2969 case '\013': /* VT: Line tabulation */
2970 compatibility(VT100);
2971 case '\012': /* LF: Line feed */
2972 if (term->curs.y == term->marg_b)
2973 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
2974 else if (term->curs.y < term->rows - 1)
2978 term->wrapnext = FALSE;
2979 seen_disp_event(term);
2980 term->paste_hold = 0;
2982 logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
2984 case '\t': /* HT: Character tabulation */
2986 pos old_curs = term->curs;
2987 termline *ldata = scrlineptr(term->curs.y);
2991 } while (term->curs.x < term->cols - 1 &&
2992 !term->tabs[term->curs.x]);
2994 if ((ldata->lattr & LATTR_MODE) != LATTR_NORM) {
2995 if (term->curs.x >= term->cols / 2)
2996 term->curs.x = term->cols / 2 - 1;
2998 if (term->curs.x >= term->cols)
2999 term->curs.x = term->cols - 1;
3002 check_selection(term, old_curs, term->curs);
3004 seen_disp_event(term);
3008 switch (term->termstate) {
3010 /* Only graphic characters get this far;
3011 * ctrls are stripped above */
3013 termline *cline = scrlineptr(term->curs.y);
3018 width = (term->cjk_ambig_wide ?
3019 mk_wcwidth_cjk((wchar_t) c) :
3020 mk_wcwidth((wchar_t) c));
3022 if (term->wrapnext && term->wrap && width > 0) {
3023 cline->lattr |= LATTR_WRAPPED;
3024 if (term->curs.y == term->marg_b)
3025 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3026 else if (term->curs.y < term->rows - 1)
3029 term->wrapnext = FALSE;
3030 cline = scrlineptr(term->curs.y);
3032 if (term->insert && width > 0)
3034 if (term->selstate != NO_SELECTION) {
3035 pos cursplus = term->curs;
3037 check_selection(term, term->curs, cursplus);
3039 if (((c & CSET_MASK) == CSET_ASCII ||
3040 (c & CSET_MASK) == 0) &&
3042 logtraffic(term->logctx, (unsigned char) c,
3048 * If we're about to display a double-width
3049 * character starting in the rightmost
3050 * column, then we do something special
3051 * instead. We must print a space in the
3052 * last column of the screen, then wrap;
3053 * and we also set LATTR_WRAPPED2 which
3054 * instructs subsequent cut-and-pasting not
3055 * only to splice this line to the one
3056 * after it, but to ignore the space in the
3057 * last character position as well.
3058 * (Because what was actually output to the
3059 * terminal was presumably just a sequence
3060 * of CJK characters, and we don't want a
3061 * space to be pasted in the middle of
3062 * those just because they had the
3063 * misfortune to start in the wrong parity
3064 * column. xterm concurs.)
3066 check_boundary(term, term->curs.x, term->curs.y);
3067 check_boundary(term, term->curs.x+2, term->curs.y);
3068 if (term->curs.x == term->cols-1) {
3069 copy_termchar(cline, term->curs.x,
3071 cline->lattr |= LATTR_WRAPPED | LATTR_WRAPPED2;
3072 if (term->curs.y == term->marg_b)
3073 scroll(term, term->marg_t, term->marg_b,
3075 else if (term->curs.y < term->rows - 1)
3078 cline = scrlineptr(term->curs.y);
3079 /* Now we must check_boundary again, of course. */
3080 check_boundary(term, term->curs.x, term->curs.y);
3081 check_boundary(term, term->curs.x+2, term->curs.y);
3085 clear_cc(cline, term->curs.x);
3086 cline->chars[term->curs.x].chr = c;
3087 cline->chars[term->curs.x].attr = term->curr_attr;
3092 clear_cc(cline, term->curs.x);
3093 cline->chars[term->curs.x].chr = UCSWIDE;
3094 cline->chars[term->curs.x].attr = term->curr_attr;
3098 check_boundary(term, term->curs.x, term->curs.y);
3099 check_boundary(term, term->curs.x+1, term->curs.y);
3102 clear_cc(cline, term->curs.x);
3103 cline->chars[term->curs.x].chr = c;
3104 cline->chars[term->curs.x].attr = term->curr_attr;
3108 if (term->curs.x > 0) {
3109 int x = term->curs.x - 1;
3111 /* If we're in wrapnext state, the character
3112 * to combine with is _here_, not to our left. */
3117 * If the previous character is
3118 * UCSWIDE, back up another one.
3120 if (cline->chars[x].chr == UCSWIDE) {
3125 add_cc(cline, x, c);
3126 seen_disp_event(term);
3133 if (term->curs.x == term->cols) {
3135 term->wrapnext = TRUE;
3136 if (term->wrap && term->vt52_mode) {
3137 cline->lattr |= LATTR_WRAPPED;
3138 if (term->curs.y == term->marg_b)
3139 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3140 else if (term->curs.y < term->rows - 1)
3143 term->wrapnext = FALSE;
3146 seen_disp_event(term);
3152 * This state is virtually identical to SEEN_ESC, with the
3153 * exception that we have an OSC sequence in the pipeline,
3154 * and _if_ we see a backslash, we process it.
3158 term->termstate = TOPLEVEL;
3161 /* else fall through */
3163 if (c >= ' ' && c <= '/') {
3164 if (term->esc_query)
3165 term->esc_query = -1;
3167 term->esc_query = c;
3170 term->termstate = TOPLEVEL;
3171 switch (ANSI(c, term->esc_query)) {
3172 case '[': /* enter CSI mode */
3173 term->termstate = SEEN_CSI;
3174 term->esc_nargs = 1;
3175 term->esc_args[0] = ARG_DEFAULT;
3176 term->esc_query = FALSE;
3178 case ']': /* OSC: xterm escape sequences */
3179 /* Compatibility is nasty here, xterm, linux, decterm yuk! */
3180 compatibility(OTHER);
3181 term->termstate = SEEN_OSC;
3182 term->esc_args[0] = 0;
3184 case '7': /* DECSC: save cursor */
3185 compatibility(VT100);
3186 save_cursor(term, TRUE);
3188 case '8': /* DECRC: restore cursor */
3189 compatibility(VT100);
3190 save_cursor(term, FALSE);
3191 seen_disp_event(term);
3193 case '=': /* DECKPAM: Keypad application mode */
3194 compatibility(VT100);
3195 term->app_keypad_keys = TRUE;
3197 case '>': /* DECKPNM: Keypad numeric mode */
3198 compatibility(VT100);
3199 term->app_keypad_keys = FALSE;
3201 case 'D': /* IND: exactly equivalent to LF */
3202 compatibility(VT100);
3203 if (term->curs.y == term->marg_b)
3204 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3205 else if (term->curs.y < term->rows - 1)
3207 term->wrapnext = FALSE;
3208 seen_disp_event(term);
3210 case 'E': /* NEL: exactly equivalent to CR-LF */
3211 compatibility(VT100);
3213 if (term->curs.y == term->marg_b)
3214 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3215 else if (term->curs.y < term->rows - 1)
3217 term->wrapnext = FALSE;
3218 seen_disp_event(term);
3220 case 'M': /* RI: reverse index - backwards LF */
3221 compatibility(VT100);
3222 if (term->curs.y == term->marg_t)
3223 scroll(term, term->marg_t, term->marg_b, -1, TRUE);
3224 else if (term->curs.y > 0)
3226 term->wrapnext = FALSE;
3227 seen_disp_event(term);
3229 case 'Z': /* DECID: terminal type query */
3230 compatibility(VT100);
3232 ldisc_send(term->ldisc, term->id_string,
3233 strlen(term->id_string), 0);
3235 case 'c': /* RIS: restore power-on settings */
3236 compatibility(VT100);
3237 power_on(term, TRUE);
3238 if (term->ldisc) /* cause ldisc to notice changes */
3239 ldisc_send(term->ldisc, NULL, 0, 0);
3240 if (term->reset_132) {
3241 if (!term->no_remote_resize)
3242 request_resize(term->frontend, 80, term->rows);
3243 term->reset_132 = 0;
3246 seen_disp_event(term);
3248 case 'H': /* HTS: set a tab */
3249 compatibility(VT100);
3250 term->tabs[term->curs.x] = TRUE;
3253 case ANSI('8', '#'): /* DECALN: fills screen with Es :-) */
3254 compatibility(VT100);
3260 for (i = 0; i < term->rows; i++) {
3261 ldata = scrlineptr(i);
3262 for (j = 0; j < term->cols; j++) {
3263 copy_termchar(ldata, j,
3264 &term->basic_erase_char);
3265 ldata->chars[j].chr = 'E';
3267 ldata->lattr = LATTR_NORM;
3270 seen_disp_event(term);
3271 scrtop.x = scrtop.y = 0;
3273 scrbot.y = term->rows;
3274 check_selection(term, scrtop, scrbot);
3278 case ANSI('3', '#'):
3279 case ANSI('4', '#'):
3280 case ANSI('5', '#'):
3281 case ANSI('6', '#'):
3282 compatibility(VT100);
3286 switch (ANSI(c, term->esc_query)) {
3287 case ANSI('3', '#'): /* DECDHL: 2*height, top */
3290 case ANSI('4', '#'): /* DECDHL: 2*height, bottom */
3293 case ANSI('5', '#'): /* DECSWL: normal */
3294 nlattr = LATTR_NORM;
3296 default: /* case ANSI('6', '#'): DECDWL: 2*width */
3297 nlattr = LATTR_WIDE;
3300 scrlineptr(term->curs.y)->lattr = nlattr;
3303 /* GZD4: G0 designate 94-set */
3304 case ANSI('A', '('):
3305 compatibility(VT100);
3306 if (!term->no_remote_charset)
3307 term->cset_attr[0] = CSET_GBCHR;
3309 case ANSI('B', '('):
3310 compatibility(VT100);
3311 if (!term->no_remote_charset)
3312 term->cset_attr[0] = CSET_ASCII;
3314 case ANSI('0', '('):
3315 compatibility(VT100);
3316 if (!term->no_remote_charset)
3317 term->cset_attr[0] = CSET_LINEDRW;
3319 case ANSI('U', '('):
3320 compatibility(OTHER);
3321 if (!term->no_remote_charset)
3322 term->cset_attr[0] = CSET_SCOACS;
3324 /* G1D4: G1-designate 94-set */
3325 case ANSI('A', ')'):
3326 compatibility(VT100);
3327 if (!term->no_remote_charset)
3328 term->cset_attr[1] = CSET_GBCHR;
3330 case ANSI('B', ')'):
3331 compatibility(VT100);
3332 if (!term->no_remote_charset)
3333 term->cset_attr[1] = CSET_ASCII;
3335 case ANSI('0', ')'):
3336 compatibility(VT100);
3337 if (!term->no_remote_charset)
3338 term->cset_attr[1] = CSET_LINEDRW;
3340 case ANSI('U', ')'):
3341 compatibility(OTHER);
3342 if (!term->no_remote_charset)
3343 term->cset_attr[1] = CSET_SCOACS;
3345 /* DOCS: Designate other coding system */
3346 case ANSI('8', '%'): /* Old Linux code */
3347 case ANSI('G', '%'):
3348 compatibility(OTHER);
3349 if (!term->no_remote_charset)
3352 case ANSI('@', '%'):
3353 compatibility(OTHER);
3354 if (!term->no_remote_charset)
3360 term->termstate = TOPLEVEL; /* default */
3362 if (term->esc_nargs <= ARGS_MAX) {
3363 if (term->esc_args[term->esc_nargs - 1] == ARG_DEFAULT)
3364 term->esc_args[term->esc_nargs - 1] = 0;
3365 term->esc_args[term->esc_nargs - 1] =
3366 10 * term->esc_args[term->esc_nargs - 1] + c - '0';
3368 term->termstate = SEEN_CSI;
3369 } else if (c == ';') {
3370 if (term->esc_nargs < ARGS_MAX)
3371 term->esc_args[term->esc_nargs++] = ARG_DEFAULT;
3372 term->termstate = SEEN_CSI;
3373 } else if (c < '@') {
3374 if (term->esc_query)
3375 term->esc_query = -1;
3377 term->esc_query = TRUE;
3379 term->esc_query = c;
3380 term->termstate = SEEN_CSI;
3382 switch (ANSI(c, term->esc_query)) {
3383 case 'A': /* CUU: move up N lines */
3384 move(term, term->curs.x,
3385 term->curs.y - def(term->esc_args[0], 1), 1);
3386 seen_disp_event(term);
3388 case 'e': /* VPR: move down N lines */
3389 compatibility(ANSI);
3391 case 'B': /* CUD: Cursor down */
3392 move(term, term->curs.x,
3393 term->curs.y + def(term->esc_args[0], 1), 1);
3394 seen_disp_event(term);
3396 case ANSI('c', '>'): /* DA: report xterm version */
3397 compatibility(OTHER);
3398 /* this reports xterm version 136 so that VIM can
3399 use the drag messages from the mouse reporting */
3401 ldisc_send(term->ldisc, "\033[>0;136;0c", 11, 0);
3403 case 'a': /* HPR: move right N cols */
3404 compatibility(ANSI);
3406 case 'C': /* CUF: Cursor right */
3407 move(term, term->curs.x + def(term->esc_args[0], 1),
3409 seen_disp_event(term);
3411 case 'D': /* CUB: move left N cols */
3412 move(term, term->curs.x - def(term->esc_args[0], 1),
3414 seen_disp_event(term);
3416 case 'E': /* CNL: move down N lines and CR */
3417 compatibility(ANSI);
3419 term->curs.y + def(term->esc_args[0], 1), 1);
3420 seen_disp_event(term);
3422 case 'F': /* CPL: move up N lines and CR */
3423 compatibility(ANSI);
3425 term->curs.y - def(term->esc_args[0], 1), 1);
3426 seen_disp_event(term);
3429 case '`': /* HPA: set horizontal posn */
3430 compatibility(ANSI);
3431 move(term, def(term->esc_args[0], 1) - 1,
3433 seen_disp_event(term);
3435 case 'd': /* VPA: set vertical posn */
3436 compatibility(ANSI);
3437 move(term, term->curs.x,
3438 ((term->dec_om ? term->marg_t : 0) +
3439 def(term->esc_args[0], 1) - 1),
3440 (term->dec_om ? 2 : 0));
3441 seen_disp_event(term);
3444 case 'f': /* HVP: set horz and vert posns at once */
3445 if (term->esc_nargs < 2)
3446 term->esc_args[1] = ARG_DEFAULT;
3447 move(term, def(term->esc_args[1], 1) - 1,
3448 ((term->dec_om ? term->marg_t : 0) +
3449 def(term->esc_args[0], 1) - 1),
3450 (term->dec_om ? 2 : 0));
3451 seen_disp_event(term);
3453 case 'J': /* ED: erase screen or parts of it */
3455 unsigned int i = def(term->esc_args[0], 0);
3457 /* Erase Saved Lines (xterm)
3458 * This follows Thomas Dickey's xterm. */
3464 erase_lots(term, FALSE, !!(i & 2), !!(i & 1));
3468 seen_disp_event(term);
3470 case 'K': /* EL: erase line or parts of it */
3472 unsigned int i = def(term->esc_args[0], 0) + 1;
3475 erase_lots(term, TRUE, !!(i & 2), !!(i & 1));
3477 seen_disp_event(term);
3479 case 'L': /* IL: insert lines */
3480 compatibility(VT102);
3481 if (term->curs.y <= term->marg_b)
3482 scroll(term, term->curs.y, term->marg_b,
3483 -def(term->esc_args[0], 1), FALSE);
3484 seen_disp_event(term);
3486 case 'M': /* DL: delete lines */
3487 compatibility(VT102);
3488 if (term->curs.y <= term->marg_b)
3489 scroll(term, term->curs.y, term->marg_b,
3490 def(term->esc_args[0], 1),
3492 seen_disp_event(term);
3494 case '@': /* ICH: insert chars */
3495 /* XXX VTTEST says this is vt220, vt510 manual says vt102 */
3496 compatibility(VT102);
3497 insch(term, def(term->esc_args[0], 1));
3498 seen_disp_event(term);
3500 case 'P': /* DCH: delete chars */
3501 compatibility(VT102);
3502 insch(term, -def(term->esc_args[0], 1));
3503 seen_disp_event(term);
3505 case 'c': /* DA: terminal type query */
3506 compatibility(VT100);
3507 /* This is the response for a VT102 */
3509 ldisc_send(term->ldisc, term->id_string,
3510 strlen(term->id_string), 0);
3512 case 'n': /* DSR: cursor position query */
3514 if (term->esc_args[0] == 6) {
3516 sprintf(buf, "\033[%d;%dR", term->curs.y + 1,
3518 ldisc_send(term->ldisc, buf, strlen(buf), 0);
3519 } else if (term->esc_args[0] == 5) {
3520 ldisc_send(term->ldisc, "\033[0n", 4, 0);
3524 case 'h': /* SM: toggle modes to high */
3526 compatibility(VT100);
3529 for (i = 0; i < term->esc_nargs; i++)
3530 toggle_mode(term, term->esc_args[i],
3531 term->esc_query, TRUE);
3534 case 'i': /* MC: Media copy */
3536 compatibility(VT100);
3539 if (term->esc_nargs != 1) break;
3540 if (term->esc_args[0] == 5 &&
3541 (printer = conf_get_str(term->conf,
3542 CONF_printer))[0]) {
3543 term->printing = TRUE;
3544 term->only_printing = !term->esc_query;
3545 term->print_state = 0;
3546 term_print_setup(term, printer);
3547 } else if (term->esc_args[0] == 4 &&
3549 term_print_finish(term);
3553 case 'l': /* RM: toggle modes to low */
3555 compatibility(VT100);
3558 for (i = 0; i < term->esc_nargs; i++)
3559 toggle_mode(term, term->esc_args[i],
3560 term->esc_query, FALSE);
3563 case 'g': /* TBC: clear tabs */
3564 compatibility(VT100);
3565 if (term->esc_nargs == 1) {
3566 if (term->esc_args[0] == 0) {
3567 term->tabs[term->curs.x] = FALSE;
3568 } else if (term->esc_args[0] == 3) {
3570 for (i = 0; i < term->cols; i++)
3571 term->tabs[i] = FALSE;
3575 case 'r': /* DECSTBM: set scroll margins */
3576 compatibility(VT100);
3577 if (term->esc_nargs <= 2) {
3579 top = def(term->esc_args[0], 1) - 1;
3580 bot = (term->esc_nargs <= 1
3581 || term->esc_args[1] == 0 ?
3583 def(term->esc_args[1], term->rows)) - 1;
3584 if (bot >= term->rows)
3585 bot = term->rows - 1;
3586 /* VTTEST Bug 9 - if region is less than 2 lines
3587 * don't change region.
3589 if (bot - top > 0) {
3594 * I used to think the cursor should be
3595 * placed at the top of the newly marginned
3596 * area. Apparently not: VMS TPU falls over
3599 * Well actually it should for
3602 term->curs.y = (term->dec_om ?
3604 seen_disp_event(term);
3608 case 'm': /* SGR: set graphics rendition */
3611 * A VT100 without the AVO only had one
3612 * attribute, either underline or
3613 * reverse video depending on the
3614 * cursor type, this was selected by
3618 * This is sometimes DIM, eg on the
3621 * This is sometimes INVIS various ANSI.
3623 * This like 22 disables BOLD, DIM and INVIS
3625 * The ANSI colours appear on any
3626 * terminal that has colour (obviously)
3627 * but the interaction between sgr0 and
3628 * the colours varies but is usually
3629 * related to the background colour
3630 * erase item. The interaction between
3631 * colour attributes and the mono ones
3632 * is also very implementation
3635 * The 39 and 49 attributes are likely
3636 * to be unimplemented.
3639 for (i = 0; i < term->esc_nargs; i++) {
3640 switch (def(term->esc_args[i], 0)) {
3641 case 0: /* restore defaults */
3642 term->curr_attr = term->default_attr;
3644 case 1: /* enable bold */
3645 compatibility(VT100AVO);
3646 term->curr_attr |= ATTR_BOLD;
3648 case 21: /* (enable double underline) */
3649 compatibility(OTHER);
3650 case 4: /* enable underline */
3651 compatibility(VT100AVO);
3652 term->curr_attr |= ATTR_UNDER;
3654 case 5: /* enable blink */
3655 compatibility(VT100AVO);
3656 term->curr_attr |= ATTR_BLINK;
3658 case 6: /* SCO light bkgrd */
3659 compatibility(SCOANSI);
3660 term->blink_is_real = FALSE;
3661 term->curr_attr |= ATTR_BLINK;
3662 term_schedule_tblink(term);
3664 case 7: /* enable reverse video */
3665 term->curr_attr |= ATTR_REVERSE;
3667 case 10: /* SCO acs off */
3668 compatibility(SCOANSI);
3669 if (term->no_remote_charset) break;
3670 term->sco_acs = 0; break;
3671 case 11: /* SCO acs on */
3672 compatibility(SCOANSI);
3673 if (term->no_remote_charset) break;
3674 term->sco_acs = 1; break;
3675 case 12: /* SCO acs on, |0x80 */
3676 compatibility(SCOANSI);
3677 if (term->no_remote_charset) break;
3678 term->sco_acs = 2; break;
3679 case 22: /* disable bold */
3680 compatibility2(OTHER, VT220);
3681 term->curr_attr &= ~ATTR_BOLD;
3683 case 24: /* disable underline */
3684 compatibility2(OTHER, VT220);
3685 term->curr_attr &= ~ATTR_UNDER;
3687 case 25: /* disable blink */
3688 compatibility2(OTHER, VT220);
3689 term->curr_attr &= ~ATTR_BLINK;
3691 case 27: /* disable reverse video */
3692 compatibility2(OTHER, VT220);
3693 term->curr_attr &= ~ATTR_REVERSE;
3704 term->curr_attr &= ~ATTR_FGMASK;
3706 (term->esc_args[i] - 30)<<ATTR_FGSHIFT;
3716 /* aixterm-style bright foreground */
3717 term->curr_attr &= ~ATTR_FGMASK;
3719 ((term->esc_args[i] - 90 + 8)
3722 case 39: /* default-foreground */
3723 term->curr_attr &= ~ATTR_FGMASK;
3724 term->curr_attr |= ATTR_DEFFG;
3735 term->curr_attr &= ~ATTR_BGMASK;
3737 (term->esc_args[i] - 40)<<ATTR_BGSHIFT;
3747 /* aixterm-style bright background */
3748 term->curr_attr &= ~ATTR_BGMASK;
3750 ((term->esc_args[i] - 100 + 8)
3753 case 49: /* default-background */
3754 term->curr_attr &= ~ATTR_BGMASK;
3755 term->curr_attr |= ATTR_DEFBG;
3757 case 38: /* xterm 256-colour mode */
3758 if (i+2 < term->esc_nargs &&
3759 term->esc_args[i+1] == 5) {
3760 term->curr_attr &= ~ATTR_FGMASK;
3762 ((term->esc_args[i+2] & 0xFF)
3767 case 48: /* xterm 256-colour mode */
3768 if (i+2 < term->esc_nargs &&
3769 term->esc_args[i+1] == 5) {
3770 term->curr_attr &= ~ATTR_BGMASK;
3772 ((term->esc_args[i+2] & 0xFF)
3779 set_erase_char(term);
3782 case 's': /* save cursor */
3783 save_cursor(term, TRUE);
3785 case 'u': /* restore cursor */
3786 save_cursor(term, FALSE);
3787 seen_disp_event(term);
3789 case 't': /* DECSLPP: set page size - ie window height */
3791 * VT340/VT420 sequence DECSLPP, DEC only allows values
3792 * 24/25/36/48/72/144 other emulators (eg dtterm) use
3793 * illegal values (eg first arg 1..9) for window changing
3796 if (term->esc_nargs <= 1
3797 && (term->esc_args[0] < 1 ||
3798 term->esc_args[0] >= 24)) {
3799 compatibility(VT340TEXT);
3800 if (!term->no_remote_resize)
3801 request_resize(term->frontend, term->cols,
3802 def(term->esc_args[0], 24));
3804 } else if (term->esc_nargs >= 1 &&
3805 term->esc_args[0] >= 1 &&
3806 term->esc_args[0] < 24) {
3807 compatibility(OTHER);
3809 switch (term->esc_args[0]) {
3813 set_iconic(term->frontend, FALSE);
3816 set_iconic(term->frontend, TRUE);
3819 if (term->esc_nargs >= 3) {
3820 if (!term->no_remote_resize)
3821 move_window(term->frontend,
3822 def(term->esc_args[1], 0),
3823 def(term->esc_args[2], 0));
3827 /* We should resize the window to a given
3828 * size in pixels here, but currently our
3829 * resizing code isn't healthy enough to
3834 set_zorder(term->frontend, TRUE);
3837 /* move to bottom */
3838 set_zorder(term->frontend, FALSE);
3841 refresh_window(term->frontend);
3844 if (term->esc_nargs >= 3) {
3845 if (!term->no_remote_resize)
3846 request_resize(term->frontend,
3847 def(term->esc_args[2], term->conf_width),
3848 def(term->esc_args[1], term->conf_height));
3852 if (term->esc_nargs >= 2)
3853 set_zoomed(term->frontend,
3859 ldisc_send(term->ldisc,
3860 is_iconic(term->frontend) ?
3861 "\033[2t" : "\033[1t", 4, 0);
3865 get_window_pos(term->frontend, &x, &y);
3866 len = sprintf(buf, "\033[3;%d;%dt", x, y);
3867 ldisc_send(term->ldisc, buf, len, 0);
3872 get_window_pixels(term->frontend, &x, &y);
3873 len = sprintf(buf, "\033[4;%d;%dt", y, x);
3874 ldisc_send(term->ldisc, buf, len, 0);
3879 len = sprintf(buf, "\033[8;%d;%dt",
3880 term->rows, term->cols);
3881 ldisc_send(term->ldisc, buf, len, 0);
3886 * Hmmm. Strictly speaking we
3887 * should return `the size of the
3888 * screen in characters', but
3889 * that's not easy: (a) window
3890 * furniture being what it is it's
3891 * hard to compute, and (b) in
3892 * resize-font mode maximising the
3893 * window wouldn't change the
3894 * number of characters. *shrug*. I
3895 * think we'll ignore it for the
3896 * moment and see if anyone
3897 * complains, and then ask them
3898 * what they would like it to do.
3903 term->remote_qtitle_action != TITLE_NONE) {
3904 if(term->remote_qtitle_action == TITLE_REAL)
3905 p = get_window_title(term->frontend, TRUE);
3907 p = EMPTY_WINDOW_TITLE;
3909 ldisc_send(term->ldisc, "\033]L", 3, 0);
3910 ldisc_send(term->ldisc, p, len, 0);
3911 ldisc_send(term->ldisc, "\033\\", 2, 0);
3916 term->remote_qtitle_action != TITLE_NONE) {
3917 if(term->remote_qtitle_action == TITLE_REAL)
3918 p = get_window_title(term->frontend, FALSE);
3920 p = EMPTY_WINDOW_TITLE;
3922 ldisc_send(term->ldisc, "\033]l", 3, 0);
3923 ldisc_send(term->ldisc, p, len, 0);
3924 ldisc_send(term->ldisc, "\033\\", 2, 0);
3930 case 'S': /* SU: Scroll up */
3931 compatibility(SCOANSI);
3932 scroll(term, term->marg_t, term->marg_b,
3933 def(term->esc_args[0], 1), TRUE);
3934 term->wrapnext = FALSE;
3935 seen_disp_event(term);
3937 case 'T': /* SD: Scroll down */
3938 compatibility(SCOANSI);
3939 scroll(term, term->marg_t, term->marg_b,
3940 -def(term->esc_args[0], 1), TRUE);
3941 term->wrapnext = FALSE;
3942 seen_disp_event(term);
3944 case ANSI('|', '*'): /* DECSNLS */
3946 * Set number of lines on screen
3947 * VT420 uses VGA like hardware and can
3948 * support any size in reasonable range
3949 * (24..49 AIUI) with no default specified.
3951 compatibility(VT420);
3952 if (term->esc_nargs == 1 && term->esc_args[0] > 0) {
3953 if (!term->no_remote_resize)
3954 request_resize(term->frontend, term->cols,
3955 def(term->esc_args[0],
3956 term->conf_height));
3960 case ANSI('|', '$'): /* DECSCPP */
3962 * Set number of columns per page
3963 * Docs imply range is only 80 or 132, but
3966 compatibility(VT340TEXT);
3967 if (term->esc_nargs <= 1) {
3968 if (!term->no_remote_resize)
3969 request_resize(term->frontend,
3970 def(term->esc_args[0],
3976 case 'X': /* ECH: write N spaces w/o moving cursor */
3977 /* XXX VTTEST says this is vt220, vt510 manual
3979 compatibility(ANSIMIN);
3981 int n = def(term->esc_args[0], 1);
3983 int p = term->curs.x;
3984 termline *cline = scrlineptr(term->curs.y);
3986 if (n > term->cols - term->curs.x)
3987 n = term->cols - term->curs.x;
3988 cursplus = term->curs;
3990 check_boundary(term, term->curs.x, term->curs.y);
3991 check_boundary(term, term->curs.x+n, term->curs.y);
3992 check_selection(term, term->curs, cursplus);
3994 copy_termchar(cline, p++,
3996 seen_disp_event(term);
3999 case 'x': /* DECREQTPARM: report terminal characteristics */
4000 compatibility(VT100);
4003 int i = def(term->esc_args[0], 0);
4004 if (i == 0 || i == 1) {
4005 strcpy(buf, "\033[2;1;1;112;112;1;0x");
4007 ldisc_send(term->ldisc, buf, 20, 0);
4012 compatibility(OTHER);
4014 int i = def(term->esc_args[0], 1);
4015 pos old_curs = term->curs;
4017 for(;i>0 && term->curs.x>0; i--) {
4020 } while (term->curs.x >0 &&
4021 !term->tabs[term->curs.x]);
4023 check_selection(term, old_curs, term->curs);
4026 case ANSI('c', '='): /* Hide or Show Cursor */
4027 compatibility(SCOANSI);
4028 switch(term->esc_args[0]) {
4029 case 0: /* hide cursor */
4030 term->cursor_on = FALSE;
4032 case 1: /* restore cursor */
4033 term->big_cursor = FALSE;
4034 term->cursor_on = TRUE;
4036 case 2: /* block cursor */
4037 term->big_cursor = TRUE;
4038 term->cursor_on = TRUE;
4042 case ANSI('C', '='):
4044 * set cursor start on scanline esc_args[0] and
4045 * end on scanline esc_args[1].If you set
4046 * the bottom scan line to a value less than
4047 * the top scan line, the cursor will disappear.
4049 compatibility(SCOANSI);
4050 if (term->esc_nargs >= 2) {
4051 if (term->esc_args[0] > term->esc_args[1])
4052 term->cursor_on = FALSE;
4054 term->cursor_on = TRUE;
4057 case ANSI('D', '='):
4058 compatibility(SCOANSI);
4059 term->blink_is_real = FALSE;
4060 term_schedule_tblink(term);
4061 if (term->esc_args[0]>=1)
4062 term->curr_attr |= ATTR_BLINK;
4064 term->curr_attr &= ~ATTR_BLINK;
4066 case ANSI('E', '='):
4067 compatibility(SCOANSI);
4068 term->blink_is_real = (term->esc_args[0] >= 1);
4069 term_schedule_tblink(term);
4071 case ANSI('F', '='): /* set normal foreground */
4072 compatibility(SCOANSI);
4073 if (term->esc_args[0] >= 0 && term->esc_args[0] < 16) {
4075 (sco2ansicolour[term->esc_args[0] & 0x7] |
4076 (term->esc_args[0] & 0x8)) <<
4078 term->curr_attr &= ~ATTR_FGMASK;
4079 term->curr_attr |= colour;
4080 term->default_attr &= ~ATTR_FGMASK;
4081 term->default_attr |= colour;
4082 set_erase_char(term);
4085 case ANSI('G', '='): /* set normal background */
4086 compatibility(SCOANSI);
4087 if (term->esc_args[0] >= 0 && term->esc_args[0] < 16) {
4089 (sco2ansicolour[term->esc_args[0] & 0x7] |
4090 (term->esc_args[0] & 0x8)) <<
4092 term->curr_attr &= ~ATTR_BGMASK;
4093 term->curr_attr |= colour;
4094 term->default_attr &= ~ATTR_BGMASK;
4095 term->default_attr |= colour;
4096 set_erase_char(term);
4099 case ANSI('L', '='):
4100 compatibility(SCOANSI);
4101 term->use_bce = (term->esc_args[0] <= 0);
4102 set_erase_char(term);
4104 case ANSI('p', '"'): /* DECSCL: set compat level */
4106 * Allow the host to make this emulator a
4107 * 'perfect' VT102. This first appeared in
4108 * the VT220, but we do need to get back to
4109 * PuTTY mode so I won't check it.
4111 * The arg in 40..42,50 are a PuTTY extension.
4112 * The 2nd arg, 8bit vs 7bit is not checked.
4114 * Setting VT102 mode should also change
4115 * the Fkeys to generate PF* codes as a
4116 * real VT102 has no Fkeys. The VT220 does
4117 * this, F11..F13 become ESC,BS,LF other
4118 * Fkeys send nothing.
4120 * Note ESC c will NOT change this!
4123 switch (term->esc_args[0]) {
4125 term->compatibility_level &= ~TM_VTXXX;
4126 term->compatibility_level |= TM_VT102;
4129 term->compatibility_level &= ~TM_VTXXX;
4130 term->compatibility_level |= TM_VT220;
4134 if (term->esc_args[0] > 60 &&
4135 term->esc_args[0] < 70)
4136 term->compatibility_level |= TM_VTXXX;
4140 term->compatibility_level &= TM_VTXXX;
4143 term->compatibility_level = TM_PUTTY;
4146 term->compatibility_level = TM_SCOANSI;
4150 term->compatibility_level = TM_PUTTY;
4156 /* Change the response to CSI c */
4157 if (term->esc_args[0] == 50) {
4160 strcpy(term->id_string, "\033[?");
4161 for (i = 1; i < term->esc_nargs; i++) {
4163 strcat(term->id_string, ";");
4164 sprintf(lbuf, "%d", term->esc_args[i]);
4165 strcat(term->id_string, lbuf);
4167 strcat(term->id_string, "c");
4170 /* Is this a good idea ?
4171 * Well we should do a soft reset at this point ...
4173 if (!has_compat(VT420) && has_compat(VT100)) {
4174 if (!term->no_remote_resize) {
4175 if (term->reset_132)
4176 request_resize(132, 24);
4178 request_resize(80, 24);
4186 term->osc_w = FALSE;
4188 case 'P': /* Linux palette sequence */
4189 term->termstate = SEEN_OSC_P;
4190 term->osc_strlen = 0;
4192 case 'R': /* Linux palette reset */
4193 palette_reset(term->frontend);
4194 term_invalidate(term);
4195 term->termstate = TOPLEVEL;
4197 case 'W': /* word-set */
4198 term->termstate = SEEN_OSC_W;
4211 term->esc_args[0] = 10 * term->esc_args[0] + c - '0';
4215 * Grotty hack to support xterm and DECterm title
4216 * sequences concurrently.
4218 if (term->esc_args[0] == 2) {
4219 term->esc_args[0] = 1;
4222 /* else fall through */
4224 term->termstate = OSC_STRING;
4225 term->osc_strlen = 0;
4230 * This OSC stuff is EVIL. It takes just one character to get into
4231 * sysline mode and it's not initially obvious how to get out.
4232 * So I've added CR and LF as string aborts.
4233 * This shouldn't effect compatibility as I believe embedded
4234 * control characters are supposed to be interpreted (maybe?)
4235 * and they don't display anything useful anyway.
4239 if (c == '\012' || c == '\015') {
4240 term->termstate = TOPLEVEL;
4241 } else if (c == 0234 || c == '\007') {
4243 * These characters terminate the string; ST and BEL
4244 * terminate the sequence and trigger instant
4245 * processing of it, whereas ESC goes back to SEEN_ESC
4246 * mode unless it is followed by \, in which case it is
4247 * synonymous with ST in the first place.
4250 term->termstate = TOPLEVEL;
4251 } else if (c == '\033')
4252 term->termstate = OSC_MAYBE_ST;
4253 else if (term->osc_strlen < OSC_STR_MAX)
4254 term->osc_string[term->osc_strlen++] = (char)c;
4258 int max = (term->osc_strlen == 0 ? 21 : 15);
4260 if ((int)c >= '0' && (int)c <= '9')
4262 else if ((int)c >= 'A' && (int)c <= 'A' + max - 10)
4264 else if ((int)c >= 'a' && (int)c <= 'a' + max - 10)
4267 term->termstate = TOPLEVEL;
4270 term->osc_string[term->osc_strlen++] = val;
4271 if (term->osc_strlen >= 7) {
4272 palette_set(term->frontend, term->osc_string[0],
4273 term->osc_string[1] * 16 + term->osc_string[2],
4274 term->osc_string[3] * 16 + term->osc_string[4],
4275 term->osc_string[5] * 16 + term->osc_string[6]);
4276 term_invalidate(term);
4277 term->termstate = TOPLEVEL;
4293 term->esc_args[0] = 10 * term->esc_args[0] + c - '0';
4296 term->termstate = OSC_STRING;
4297 term->osc_strlen = 0;
4301 term->termstate = TOPLEVEL;
4302 seen_disp_event(term);
4305 move(term, term->curs.x, term->curs.y - 1, 1);
4308 move(term, term->curs.x, term->curs.y + 1, 1);
4311 move(term, term->curs.x + 1, term->curs.y, 1);
4314 move(term, term->curs.x - 1, term->curs.y, 1);
4317 * From the VT100 Manual
4318 * NOTE: The special graphics characters in the VT100
4319 * are different from those in the VT52
4321 * From VT102 manual:
4322 * 137 _ Blank - Same
4323 * 140 ` Reserved - Humm.
4324 * 141 a Solid rectangle - Similar
4325 * 142 b 1/ - Top half of fraction for the
4326 * 143 c 3/ - subscript numbers below.
4329 * 146 f Degrees - Same
4330 * 147 g Plus or minus - Same
4332 * 151 i Ellipsis (dots)
4335 * 154 l Bar at scan 0
4336 * 155 m Bar at scan 1
4337 * 156 n Bar at scan 2
4338 * 157 o Bar at scan 3 - Similar
4339 * 160 p Bar at scan 4 - Similar
4340 * 161 q Bar at scan 5 - Similar
4341 * 162 r Bar at scan 6 - Same
4342 * 163 s Bar at scan 7 - Similar
4357 term->cset_attr[term->cset = 0] = CSET_LINEDRW;
4360 term->cset_attr[term->cset = 0] = CSET_ASCII;
4363 move(term, 0, 0, 0);
4366 if (term->curs.y == 0)
4367 scroll(term, 0, term->rows - 1, -1, TRUE);
4368 else if (term->curs.y > 0)
4370 term->wrapnext = FALSE;
4373 erase_lots(term, FALSE, FALSE, TRUE);
4377 erase_lots(term, TRUE, FALSE, TRUE);
4381 /* XXX Print cursor line */
4384 /* XXX Start controller mode */
4387 /* XXX Stop controller mode */
4391 term->termstate = VT52_Y1;
4395 ldisc_send(term->ldisc, "\033/Z", 3, 0);
4398 term->app_keypad_keys = TRUE;
4401 term->app_keypad_keys = FALSE;
4404 /* XXX This should switch to VT100 mode not current or default
4405 * VT mode. But this will only have effect in a VT220+
4408 term->vt52_mode = FALSE;
4409 term->blink_is_real = term->blinktext;
4410 term_schedule_tblink(term);
4414 /* XXX Enter auto print mode */
4417 /* XXX Exit auto print mode */
4420 /* XXX Print screen */
4426 /* compatibility(ATARI) */
4427 move(term, 0, 0, 0);
4428 erase_lots(term, FALSE, FALSE, TRUE);
4432 /* compatibility(ATARI) */
4433 if (term->curs.y <= term->marg_b)
4434 scroll(term, term->curs.y, term->marg_b, -1, FALSE);
4437 /* compatibility(ATARI) */
4438 if (term->curs.y <= term->marg_b)
4439 scroll(term, term->curs.y, term->marg_b, 1, TRUE);
4442 /* compatibility(ATARI) */
4443 term->termstate = VT52_FG;
4446 /* compatibility(ATARI) */
4447 term->termstate = VT52_BG;
4450 /* compatibility(ATARI) */
4451 erase_lots(term, FALSE, TRUE, FALSE);
4455 /* compatibility(ATARI) */
4456 term->cursor_on = TRUE;
4459 /* compatibility(ATARI) */
4460 term->cursor_on = FALSE;
4462 /* case 'j': Save cursor position - broken on ST */
4463 /* case 'k': Restore cursor position */
4465 /* compatibility(ATARI) */
4466 erase_lots(term, TRUE, TRUE, TRUE);
4468 term->wrapnext = FALSE;
4471 /* compatibility(ATARI) */
4472 erase_lots(term, TRUE, TRUE, FALSE);
4475 /* compatibility(ATARI) */
4476 term->curr_attr |= ATTR_REVERSE;
4479 /* compatibility(ATARI) */
4480 term->curr_attr &= ~ATTR_REVERSE;
4482 case 'v': /* wrap Autowrap on - Wyse style */
4483 /* compatibility(ATARI) */
4486 case 'w': /* Autowrap off */
4487 /* compatibility(ATARI) */
4492 /* compatibility(OTHER) */
4493 term->vt52_bold = FALSE;
4494 term->curr_attr = ATTR_DEFAULT;
4495 set_erase_char(term);
4498 /* compatibility(VI50) */
4499 term->curr_attr |= ATTR_UNDER;
4502 /* compatibility(VI50) */
4503 term->curr_attr &= ~ATTR_UNDER;
4506 /* compatibility(VI50) */
4507 term->vt52_bold = TRUE;
4508 term->curr_attr |= ATTR_BOLD;
4511 /* compatibility(VI50) */
4512 term->vt52_bold = FALSE;
4513 term->curr_attr &= ~ATTR_BOLD;
4519 term->termstate = VT52_Y2;
4520 move(term, term->curs.x, c - ' ', 0);
4523 term->termstate = TOPLEVEL;
4524 move(term, c - ' ', term->curs.y, 0);
4529 term->termstate = TOPLEVEL;
4530 term->curr_attr &= ~ATTR_FGMASK;
4531 term->curr_attr &= ~ATTR_BOLD;
4532 term->curr_attr |= (c & 0xF) << ATTR_FGSHIFT;
4533 set_erase_char(term);
4536 term->termstate = TOPLEVEL;
4537 term->curr_attr &= ~ATTR_BGMASK;
4538 term->curr_attr &= ~ATTR_BLINK;
4539 term->curr_attr |= (c & 0xF) << ATTR_BGSHIFT;
4540 set_erase_char(term);
4543 default: break; /* placate gcc warning about enum use */
4545 if (term->selstate != NO_SELECTION) {
4546 pos cursplus = term->curs;
4548 check_selection(term, term->curs, cursplus);
4552 term_print_flush(term);
4554 logflush(term->logctx);
4558 * To prevent having to run the reasonably tricky bidi algorithm
4559 * too many times, we maintain a cache of the last lineful of data
4560 * fed to the algorithm on each line of the display.
4562 static int term_bidi_cache_hit(Terminal *term, int line,
4563 termchar *lbefore, int width)
4567 if (!term->pre_bidi_cache)
4568 return FALSE; /* cache doesn't even exist yet! */
4570 if (line >= term->bidi_cache_size)
4571 return FALSE; /* cache doesn't have this many lines */
4573 if (!term->pre_bidi_cache[line].chars)
4574 return FALSE; /* cache doesn't contain _this_ line */
4576 if (term->pre_bidi_cache[line].width != width)
4577 return FALSE; /* line is wrong width */
4579 for (i = 0; i < width; i++)
4580 if (!termchars_equal(term->pre_bidi_cache[line].chars+i, lbefore+i))
4581 return FALSE; /* line doesn't match cache */
4583 return TRUE; /* it didn't match. */
4586 static void term_bidi_cache_store(Terminal *term, int line, termchar *lbefore,
4587 termchar *lafter, bidi_char *wcTo,
4588 int width, int size)
4592 if (!term->pre_bidi_cache || term->bidi_cache_size <= line) {
4593 int j = term->bidi_cache_size;
4594 term->bidi_cache_size = line+1;
4595 term->pre_bidi_cache = sresize(term->pre_bidi_cache,
4596 term->bidi_cache_size,
4597 struct bidi_cache_entry);
4598 term->post_bidi_cache = sresize(term->post_bidi_cache,
4599 term->bidi_cache_size,
4600 struct bidi_cache_entry);
4601 while (j < term->bidi_cache_size) {
4602 term->pre_bidi_cache[j].chars =
4603 term->post_bidi_cache[j].chars = NULL;
4604 term->pre_bidi_cache[j].width =
4605 term->post_bidi_cache[j].width = -1;
4606 term->pre_bidi_cache[j].forward =
4607 term->post_bidi_cache[j].forward = NULL;
4608 term->pre_bidi_cache[j].backward =
4609 term->post_bidi_cache[j].backward = NULL;
4614 sfree(term->pre_bidi_cache[line].chars);
4615 sfree(term->post_bidi_cache[line].chars);
4616 sfree(term->post_bidi_cache[line].forward);
4617 sfree(term->post_bidi_cache[line].backward);
4619 term->pre_bidi_cache[line].width = width;
4620 term->pre_bidi_cache[line].chars = snewn(size, termchar);
4621 term->post_bidi_cache[line].width = width;
4622 term->post_bidi_cache[line].chars = snewn(size, termchar);
4623 term->post_bidi_cache[line].forward = snewn(width, int);
4624 term->post_bidi_cache[line].backward = snewn(width, int);
4626 memcpy(term->pre_bidi_cache[line].chars, lbefore, size * TSIZE);
4627 memcpy(term->post_bidi_cache[line].chars, lafter, size * TSIZE);
4628 memset(term->post_bidi_cache[line].forward, 0, width * sizeof(int));
4629 memset(term->post_bidi_cache[line].backward, 0, width * sizeof(int));
4631 for (i = 0; i < width; i++) {
4632 int p = wcTo[i].index;
4634 assert(0 <= p && p < width);
4636 term->post_bidi_cache[line].backward[i] = p;
4637 term->post_bidi_cache[line].forward[p] = i;
4642 * Prepare the bidi information for a screen line. Returns the
4643 * transformed list of termchars, or NULL if no transformation at
4644 * all took place (because bidi is disabled). If return was
4645 * non-NULL, auxiliary information such as the forward and reverse
4646 * mappings of permutation position are available in
4647 * term->post_bidi_cache[scr_y].*.
4649 static termchar *term_bidi_line(Terminal *term, struct termline *ldata,
4655 /* Do Arabic shaping and bidi. */
4656 if(!term->bidi || !term->arabicshaping) {
4658 if (!term_bidi_cache_hit(term, scr_y, ldata->chars, term->cols)) {
4660 if (term->wcFromTo_size < term->cols) {
4661 term->wcFromTo_size = term->cols;
4662 term->wcFrom = sresize(term->wcFrom, term->wcFromTo_size,
4664 term->wcTo = sresize(term->wcTo, term->wcFromTo_size,
4668 for(it=0; it<term->cols ; it++)
4670 unsigned long uc = (ldata->chars[it].chr);
4672 switch (uc & CSET_MASK) {
4674 if (!term->rawcnp) {
4675 uc = term->ucsdata->unitab_xterm[uc & 0xFF];
4679 uc = term->ucsdata->unitab_line[uc & 0xFF];
4682 uc = term->ucsdata->unitab_scoacs[uc&0xFF];
4685 switch (uc & CSET_MASK) {
4687 uc = term->ucsdata->unitab_font[uc & 0xFF];
4690 uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
4694 term->wcFrom[it].origwc = term->wcFrom[it].wc =
4696 term->wcFrom[it].index = it;
4700 do_bidi(term->wcFrom, term->cols);
4702 /* this is saved iff done from inside the shaping */
4703 if(!term->bidi && term->arabicshaping)
4704 for(it=0; it<term->cols; it++)
4705 term->wcTo[it] = term->wcFrom[it];
4707 if(!term->arabicshaping)
4708 do_shape(term->wcFrom, term->wcTo, term->cols);
4710 if (term->ltemp_size < ldata->size) {
4711 term->ltemp_size = ldata->size;
4712 term->ltemp = sresize(term->ltemp, term->ltemp_size,
4716 memcpy(term->ltemp, ldata->chars, ldata->size * TSIZE);
4718 for(it=0; it<term->cols ; it++)
4720 term->ltemp[it] = ldata->chars[term->wcTo[it].index];
4721 if (term->ltemp[it].cc_next)
4722 term->ltemp[it].cc_next -=
4723 it - term->wcTo[it].index;
4725 if (term->wcTo[it].origwc != term->wcTo[it].wc)
4726 term->ltemp[it].chr = term->wcTo[it].wc;
4728 term_bidi_cache_store(term, scr_y, ldata->chars,
4729 term->ltemp, term->wcTo,
4730 term->cols, ldata->size);
4732 lchars = term->ltemp;
4734 lchars = term->post_bidi_cache[scr_y].chars;
4744 * Given a context, update the window. Out of paranoia, we don't
4745 * allow WM_PAINT responses to do scrolling optimisations.
4747 static void do_paint(Terminal *term, Context ctx, int may_optimise)
4749 int i, j, our_curs_y, our_curs_x;
4754 #ifdef OPTIMISE_SCROLL
4755 struct scrollregion *sr;
4756 #endif /* OPTIMISE_SCROLL */
4760 ch = snewn(chlen, wchar_t);
4762 newline = snewn(term->cols, termchar);
4764 rv = (!term->rvideo ^ !term->in_vbell ? ATTR_REVERSE : 0);
4767 * screen array, disptop, scrtop,
4769 * blinkpc, blink_is_real, tblinker,
4770 * curs.y, curs.x, cblinker, blink_cur, cursor_on, has_focus, wrapnext
4773 /* Has the cursor position or type changed ? */
4774 if (term->cursor_on) {
4775 if (term->has_focus) {
4776 if (term->cblinker || !term->blink_cur)
4777 cursor = TATTR_ACTCURS;
4781 cursor = TATTR_PASCURS;
4783 cursor |= TATTR_RIGHTCURS;
4786 our_curs_y = term->curs.y - term->disptop;
4789 * Adjust the cursor position:
4791 * - in the case where it's resting on the right-hand half
4792 * of a CJK wide character. xterm's behaviour here,
4793 * which seems adequate to me, is to display the cursor
4794 * covering the _whole_ character, exactly as if it were
4795 * one space to the left.
4797 termline *ldata = lineptr(term->curs.y);
4800 our_curs_x = term->curs.x;
4802 if ( (lchars = term_bidi_line(term, ldata, our_curs_y)) != NULL) {
4803 our_curs_x = term->post_bidi_cache[our_curs_y].forward[our_curs_x];
4805 lchars = ldata->chars;
4807 if (our_curs_x > 0 &&
4808 lchars[our_curs_x].chr == UCSWIDE)
4815 * If the cursor is not where it was last time we painted, and
4816 * its previous position is visible on screen, invalidate its
4817 * previous position.
4819 if (term->dispcursy >= 0 &&
4820 (term->curstype != cursor ||
4821 term->dispcursy != our_curs_y ||
4822 term->dispcursx != our_curs_x)) {
4823 termchar *dispcurs = term->disptext[term->dispcursy]->chars +
4826 if (term->dispcursx > 0 && dispcurs->chr == UCSWIDE)
4827 dispcurs[-1].attr |= ATTR_INVALID;
4828 if (term->dispcursx < term->cols-1 && dispcurs[1].chr == UCSWIDE)
4829 dispcurs[1].attr |= ATTR_INVALID;
4830 dispcurs->attr |= ATTR_INVALID;
4834 term->dispcursx = term->dispcursy = -1;
4836 #ifdef OPTIMISE_SCROLL
4838 sr = term->scrollhead;
4840 struct scrollregion *next = sr->next;
4841 do_scroll(ctx, sr->topline, sr->botline, sr->lines);
4845 term->scrollhead = term->scrolltail = NULL;
4846 #endif /* OPTIMISE_SCROLL */
4848 /* The normal screen data */
4849 for (i = 0; i < term->rows; i++) {
4852 int dirty_line, dirty_run, selected;
4853 unsigned long attr = 0, cset = 0;
4856 int last_run_dirty = 0;
4857 int laststart, dirtyrect;
4860 scrpos.y = i + term->disptop;
4861 ldata = lineptr(scrpos.y);
4863 /* Do Arabic shaping and bidi. */
4864 lchars = term_bidi_line(term, ldata, i);
4866 backward = term->post_bidi_cache[i].backward;
4868 lchars = ldata->chars;
4873 * First loop: work along the line deciding what we want
4874 * each character cell to look like.
4876 for (j = 0; j < term->cols; j++) {
4877 unsigned long tattr, tchar;
4878 termchar *d = lchars + j;
4879 scrpos.x = backward ? backward[j] : j;
4884 if (!term->ansi_colour)
4885 tattr = (tattr & ~(ATTR_FGMASK | ATTR_BGMASK)) |
4886 ATTR_DEFFG | ATTR_DEFBG;
4888 if (!term->xterm_256_colour) {
4890 colour = (tattr & ATTR_FGMASK) >> ATTR_FGSHIFT;
4891 if (colour >= 16 && colour < 256)
4892 tattr = (tattr &~ ATTR_FGMASK) | ATTR_DEFFG;
4893 colour = (tattr & ATTR_BGMASK) >> ATTR_BGSHIFT;
4894 if (colour >= 16 && colour < 256)
4895 tattr = (tattr &~ ATTR_BGMASK) | ATTR_DEFBG;
4898 switch (tchar & CSET_MASK) {
4900 tchar = term->ucsdata->unitab_line[tchar & 0xFF];
4903 tchar = term->ucsdata->unitab_xterm[tchar & 0xFF];
4906 tchar = term->ucsdata->unitab_scoacs[tchar&0xFF];
4909 if (j < term->cols-1 && d[1].chr == UCSWIDE)
4912 /* Video reversing things */
4913 if (term->selstate == DRAGGING || term->selstate == SELECTED) {
4914 if (term->seltype == LEXICOGRAPHIC)
4915 selected = (posle(term->selstart, scrpos) &&
4916 poslt(scrpos, term->selend));
4918 selected = (posPle(term->selstart, scrpos) &&
4919 posPlt(scrpos, term->selend));
4923 ^ (selected ? ATTR_REVERSE : 0));
4925 /* 'Real' blinking ? */
4926 if (term->blink_is_real && (tattr & ATTR_BLINK)) {
4927 if (term->has_focus && term->tblinker) {
4928 tchar = term->ucsdata->unitab_line[(unsigned char)' '];
4930 tattr &= ~ATTR_BLINK;
4934 * Check the font we'll _probably_ be using to see if
4935 * the character is wide when we don't want it to be.
4937 if (tchar != term->disptext[i]->chars[j].chr ||
4938 tattr != (term->disptext[i]->chars[j].attr &~
4939 (ATTR_NARROW | DATTR_MASK))) {
4940 if ((tattr & ATTR_WIDE) == 0 && char_width(ctx, tchar) == 2)
4941 tattr |= ATTR_NARROW;
4942 } else if (term->disptext[i]->chars[j].attr & ATTR_NARROW)
4943 tattr |= ATTR_NARROW;
4945 if (i == our_curs_y && j == our_curs_x) {
4947 term->curstype = cursor;
4948 term->dispcursx = j;
4949 term->dispcursy = i;
4953 newline[j].attr = tattr;
4954 newline[j].chr = tchar;
4955 /* Combining characters are still read from lchars */
4956 newline[j].cc_next = 0;
4960 * Now loop over the line again, noting where things have
4963 * During this loop, we keep track of where we last saw
4964 * DATTR_STARTRUN. Any mismatch automatically invalidates
4965 * _all_ of the containing run that was last printed: that
4966 * is, any rectangle that was drawn in one go in the
4967 * previous update should be either left completely alone
4968 * or overwritten in its entirety. This, along with the
4969 * expectation that front ends clip all text runs to their
4970 * bounding rectangle, should solve any possible problems
4971 * with fonts that overflow their character cells.
4975 for (j = 0; j < term->cols; j++) {
4976 if (term->disptext[i]->chars[j].attr & DATTR_STARTRUN) {
4981 if (term->disptext[i]->chars[j].chr != newline[j].chr ||
4982 (term->disptext[i]->chars[j].attr &~ DATTR_MASK)
4983 != newline[j].attr) {
4987 for (k = laststart; k < j; k++)
4988 term->disptext[i]->chars[k].attr |= ATTR_INVALID;
4995 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
4999 * Finally, loop once more and actually do the drawing.
5001 dirty_run = dirty_line = (ldata->lattr !=
5002 term->disptext[i]->lattr);
5003 term->disptext[i]->lattr = ldata->lattr;
5005 for (j = 0; j < term->cols; j++) {
5006 unsigned long tattr, tchar;
5007 int break_run, do_copy;
5008 termchar *d = lchars + j;
5010 tattr = newline[j].attr;
5011 tchar = newline[j].chr;
5013 if ((term->disptext[i]->chars[j].attr ^ tattr) & ATTR_WIDE)
5016 break_run = ((tattr ^ attr) & term->attr_mask) != 0;
5018 /* Special hack for VT100 Linedraw glyphs */
5019 if ((tchar >= 0x23BA && tchar <= 0x23BD) ||
5020 (j > 0 && (newline[j-1].chr >= 0x23BA &&
5021 newline[j-1].chr <= 0x23BD)))
5025 * Separate out sequences of characters that have the
5026 * same CSET, if that CSET is a magic one.
5028 if (CSET_OF(tchar) != cset)
5032 * Break on both sides of any combined-character cell.
5034 if (d->cc_next != 0 ||
5035 (j > 0 && d[-1].cc_next != 0))
5038 if (!term->ucsdata->dbcs_screenfont && !dirty_line) {
5039 if (term->disptext[i]->chars[j].chr == tchar &&
5040 (term->disptext[i]->chars[j].attr &~ DATTR_MASK) == tattr)
5042 else if (!dirty_run && ccount == 1)
5047 if ((dirty_run || last_run_dirty) && ccount > 0) {
5048 do_text(ctx, start, i, ch, ccount, attr,
5050 if (attr & (TATTR_ACTCURS | TATTR_PASCURS))
5051 do_cursor(ctx, start, i, ch, ccount, attr,
5057 cset = CSET_OF(tchar);
5058 if (term->ucsdata->dbcs_screenfont)
5059 last_run_dirty = dirty_run;
5060 dirty_run = dirty_line;
5064 if (!termchars_equal_override(&term->disptext[i]->chars[j],
5070 if (ccount >= chlen) {
5071 chlen = ccount + 256;
5072 ch = sresize(ch, chlen, wchar_t);
5074 ch[ccount++] = (wchar_t) tchar;
5079 while (dd->cc_next) {
5080 unsigned long schar;
5085 switch (schar & CSET_MASK) {
5087 schar = term->ucsdata->unitab_line[schar & 0xFF];
5090 schar = term->ucsdata->unitab_xterm[schar & 0xFF];
5093 schar = term->ucsdata->unitab_scoacs[schar&0xFF];
5097 if (ccount >= chlen) {
5098 chlen = ccount + 256;
5099 ch = sresize(ch, chlen, wchar_t);
5101 ch[ccount++] = (wchar_t) schar;
5104 attr |= TATTR_COMBINING;
5108 copy_termchar(term->disptext[i], j, d);
5109 term->disptext[i]->chars[j].chr = tchar;
5110 term->disptext[i]->chars[j].attr = tattr;
5112 term->disptext[i]->chars[j].attr |= DATTR_STARTRUN;
5115 /* If it's a wide char step along to the next one. */
5116 if (tattr & ATTR_WIDE) {
5117 if (++j < term->cols) {
5120 * By construction above, the cursor should not
5121 * be on the right-hand half of this character.
5124 assert(!(i == our_curs_y && j == our_curs_x));
5125 if (!termchars_equal(&term->disptext[i]->chars[j], d))
5127 copy_termchar(term->disptext[i], j, d);
5131 if (dirty_run && ccount > 0) {
5132 do_text(ctx, start, i, ch, ccount, attr,
5134 if (attr & (TATTR_ACTCURS | TATTR_PASCURS))
5135 do_cursor(ctx, start, i, ch, ccount, attr,
5147 * Invalidate the whole screen so it will be repainted in full.
5149 void term_invalidate(Terminal *term)
5153 for (i = 0; i < term->rows; i++)
5154 for (j = 0; j < term->cols; j++)
5155 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5157 term_schedule_update(term);
5161 * Paint the window in response to a WM_PAINT message.
5163 void term_paint(Terminal *term, Context ctx,
5164 int left, int top, int right, int bottom, int immediately)
5167 if (left < 0) left = 0;
5168 if (top < 0) top = 0;
5169 if (right >= term->cols) right = term->cols-1;
5170 if (bottom >= term->rows) bottom = term->rows-1;
5172 for (i = top; i <= bottom && i < term->rows; i++) {
5173 if ((term->disptext[i]->lattr & LATTR_MODE) == LATTR_NORM)
5174 for (j = left; j <= right && j < term->cols; j++)
5175 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5177 for (j = left / 2; j <= right / 2 + 1 && j < term->cols; j++)
5178 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5182 do_paint (term, ctx, FALSE);
5184 term_schedule_update(term);
5189 * Attempt to scroll the scrollback. The second parameter gives the
5190 * position we want to scroll to; the first is +1 to denote that
5191 * this position is relative to the beginning of the scrollback, -1
5192 * to denote it is relative to the end, and 0 to denote that it is
5193 * relative to the current position.
5195 void term_scroll(Terminal *term, int rel, int where)
5197 int sbtop = -sblines(term);
5198 #ifdef OPTIMISE_SCROLL
5199 int olddisptop = term->disptop;
5201 #endif /* OPTIMISE_SCROLL */
5203 term->disptop = (rel < 0 ? 0 : rel > 0 ? sbtop : term->disptop) + where;
5204 if (term->disptop < sbtop)
5205 term->disptop = sbtop;
5206 if (term->disptop > 0)
5209 #ifdef OPTIMISE_SCROLL
5210 shift = (term->disptop - olddisptop);
5211 if (shift < term->rows && shift > -term->rows)
5212 scroll_display(term, 0, term->rows - 1, shift);
5213 #endif /* OPTIMISE_SCROLL */
5218 * Scroll the scrollback to centre it on the beginning or end of the
5219 * current selection, if any.
5221 void term_scroll_to_selection(Terminal *term, int which_end)
5225 int sbtop = -sblines(term);
5227 if (term->selstate != SELECTED)
5230 target = term->selend;
5232 target = term->selstart;
5234 y = target.y - term->rows/2;
5239 term_scroll(term, -1, y);
5243 * Helper routine for clipme(): growing buffer.
5246 int buflen; /* amount of allocated space in textbuf/attrbuf */
5247 int bufpos; /* amount of actual data */
5248 wchar_t *textbuf; /* buffer for copied text */
5249 wchar_t *textptr; /* = textbuf + bufpos (current insertion point) */
5250 int *attrbuf; /* buffer for copied attributes */
5251 int *attrptr; /* = attrbuf + bufpos */
5254 static void clip_addchar(clip_workbuf *b, wchar_t chr, int attr)
5256 if (b->bufpos >= b->buflen) {
5258 b->textbuf = sresize(b->textbuf, b->buflen, wchar_t);
5259 b->textptr = b->textbuf + b->bufpos;
5260 b->attrbuf = sresize(b->attrbuf, b->buflen, int);
5261 b->attrptr = b->attrbuf + b->bufpos;
5263 *b->textptr++ = chr;
5264 *b->attrptr++ = attr;
5268 static void clipme(Terminal *term, pos top, pos bottom, int rect, int desel)
5276 buf.textptr = buf.textbuf = snewn(buf.buflen, wchar_t);
5277 buf.attrptr = buf.attrbuf = snewn(buf.buflen, int);
5279 old_top_x = top.x; /* needed for rect==1 */
5281 while (poslt(top, bottom)) {
5283 termline *ldata = lineptr(top.y);
5287 * nlpos will point at the maximum position on this line we
5288 * should copy up to. So we start it at the end of the
5292 nlpos.x = term->cols;
5295 * ... move it backwards if there's unused space at the end
5296 * of the line (and also set `nl' if this is the case,
5297 * because in normal selection mode this means we need a
5298 * newline at the end)...
5300 if (!(ldata->lattr & LATTR_WRAPPED)) {
5302 IS_SPACE_CHR(ldata->chars[nlpos.x - 1].chr) &&
5303 !ldata->chars[nlpos.x - 1].cc_next &&
5306 if (poslt(nlpos, bottom))
5308 } else if (ldata->lattr & LATTR_WRAPPED2) {
5309 /* Ignore the last char on the line in a WRAPPED2 line. */
5314 * ... and then clip it to the terminal x coordinate if
5315 * we're doing rectangular selection. (In this case we
5316 * still did the above, so that copying e.g. the right-hand
5317 * column from a table doesn't fill with spaces on the
5321 if (nlpos.x > bottom.x)
5323 nl = (top.y < bottom.y);
5326 while (poslt(top, bottom) && poslt(top, nlpos)) {
5329 sprintf(cbuf, "<U+%04x>", (ldata[top.x] & 0xFFFF));
5331 wchar_t cbuf[16], *p;
5335 if (ldata->chars[x].chr == UCSWIDE) {
5341 int uc = ldata->chars[x].chr;
5342 attr = ldata->chars[x].attr;
5344 switch (uc & CSET_MASK) {
5346 if (!term->rawcnp) {
5347 uc = term->ucsdata->unitab_xterm[uc & 0xFF];
5351 uc = term->ucsdata->unitab_line[uc & 0xFF];
5354 uc = term->ucsdata->unitab_scoacs[uc&0xFF];
5357 switch (uc & CSET_MASK) {
5359 uc = term->ucsdata->unitab_font[uc & 0xFF];
5362 uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
5366 c = (uc & ~CSET_MASK);
5367 #ifdef PLATFORM_IS_UTF16
5368 if (uc > 0x10000 && uc < 0x110000) {
5369 cbuf[0] = 0xD800 | ((uc - 0x10000) >> 10);
5370 cbuf[1] = 0xDC00 | ((uc - 0x10000) & 0x3FF);
5379 if (DIRECT_FONT(uc)) {
5380 if (c >= ' ' && c != 0x7F) {
5384 if (is_dbcs_leadbyte(term->ucsdata->font_codepage, (BYTE) c)) {
5386 buf[1] = (char) (0xFF & ldata->chars[top.x + 1].chr);
5387 rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 2, wbuf, 4);
5391 rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 1, wbuf, 4);
5395 memcpy(cbuf, wbuf, rv * sizeof(wchar_t));
5402 for (p = cbuf; *p; p++)
5403 clip_addchar(&buf, *p, attr);
5405 if (ldata->chars[x].cc_next)
5406 x += ldata->chars[x].cc_next;
5414 for (i = 0; i < sel_nl_sz; i++)
5415 clip_addchar(&buf, sel_nl[i], 0);
5418 top.x = rect ? old_top_x : 0;
5422 #if SELECTION_NUL_TERMINATED
5423 clip_addchar(&buf, 0, 0);
5425 /* Finally, transfer all that to the clipboard. */
5426 write_clip(term->frontend, buf.textbuf, buf.attrbuf, buf.bufpos, desel);
5431 void term_copyall(Terminal *term)
5435 tree234 *screen = term->screen;
5436 top.y = -sblines(term);
5438 bottom.y = find_last_nonempty_line(term, screen);
5439 bottom.x = term->cols;
5440 clipme(term, top, bottom, 0, TRUE);
5444 * The wordness array is mainly for deciding the disposition of the
5445 * US-ASCII characters.
5447 static int wordtype(Terminal *term, int uc)
5450 int start, end, ctype;
5452 static const struct ucsword ucs_words[] = {
5458 0x037e, 0x037e, 1}, /* Greek question mark */
5460 0x0387, 0x0387, 1}, /* Greek ano teleia */
5462 0x055a, 0x055f, 1}, /* Armenian punctuation */
5464 0x0589, 0x0589, 1}, /* Armenian full stop */
5466 0x0700, 0x070d, 1}, /* Syriac punctuation */
5468 0x104a, 0x104f, 1}, /* Myanmar punctuation */
5470 0x10fb, 0x10fb, 1}, /* Georgian punctuation */
5472 0x1361, 0x1368, 1}, /* Ethiopic punctuation */
5474 0x166d, 0x166e, 1}, /* Canadian Syl. punctuation */
5476 0x17d4, 0x17dc, 1}, /* Khmer punctuation */
5478 0x1800, 0x180a, 1}, /* Mongolian punctuation */
5480 0x2000, 0x200a, 0}, /* Various spaces */
5482 0x2070, 0x207f, 2}, /* superscript */
5484 0x2080, 0x208f, 2}, /* subscript */
5486 0x200b, 0x27ff, 1}, /* punctuation and symbols */
5488 0x3000, 0x3000, 0}, /* ideographic space */
5490 0x3001, 0x3020, 1}, /* ideographic punctuation */
5492 0x303f, 0x309f, 3}, /* Hiragana */
5494 0x30a0, 0x30ff, 3}, /* Katakana */
5496 0x3300, 0x9fff, 3}, /* CJK Ideographs */
5498 0xac00, 0xd7a3, 3}, /* Hangul Syllables */
5500 0xf900, 0xfaff, 3}, /* CJK Ideographs */
5502 0xfe30, 0xfe6b, 1}, /* punctuation forms */
5504 0xff00, 0xff0f, 1}, /* half/fullwidth ASCII */
5506 0xff1a, 0xff20, 1}, /* half/fullwidth ASCII */
5508 0xff3b, 0xff40, 1}, /* half/fullwidth ASCII */
5510 0xff5b, 0xff64, 1}, /* half/fullwidth ASCII */
5512 0xfff0, 0xffff, 0}, /* half/fullwidth ASCII */
5516 const struct ucsword *wptr;
5518 switch (uc & CSET_MASK) {
5520 uc = term->ucsdata->unitab_xterm[uc & 0xFF];
5523 uc = term->ucsdata->unitab_line[uc & 0xFF];
5526 uc = term->ucsdata->unitab_scoacs[uc&0xFF];
5529 switch (uc & CSET_MASK) {
5531 uc = term->ucsdata->unitab_font[uc & 0xFF];
5534 uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
5538 /* For DBCS fonts I can't do anything useful. Even this will sometimes
5539 * fail as there's such a thing as a double width space. :-(
5541 if (term->ucsdata->dbcs_screenfont &&
5542 term->ucsdata->font_codepage == term->ucsdata->line_codepage)
5546 return term->wordness[uc];
5548 for (wptr = ucs_words; wptr->start; wptr++) {
5549 if (uc >= wptr->start && uc <= wptr->end)
5557 * Spread the selection outwards according to the selection mode.
5559 static pos sel_spread_half(Terminal *term, pos p, int dir)
5563 int topy = -sblines(term);
5565 ldata = lineptr(p.y);
5567 switch (term->selmode) {
5570 * In this mode, every character is a separate unit, except
5571 * for runs of spaces at the end of a non-wrapping line.
5573 if (!(ldata->lattr & LATTR_WRAPPED)) {
5574 termchar *q = ldata->chars + term->cols;
5575 while (q > ldata->chars &&
5576 IS_SPACE_CHR(q[-1].chr) && !q[-1].cc_next)
5578 if (q == ldata->chars + term->cols)
5580 if (p.x >= q - ldata->chars)
5581 p.x = (dir == -1 ? q - ldata->chars : term->cols - 1);
5586 * In this mode, the units are maximal runs of characters
5587 * whose `wordness' has the same value.
5589 wvalue = wordtype(term, UCSGET(ldata->chars, p.x));
5592 int maxcols = (ldata->lattr & LATTR_WRAPPED2 ?
5593 term->cols-1 : term->cols);
5594 if (p.x < maxcols-1) {
5595 if (wordtype(term, UCSGET(ldata->chars, p.x+1)) == wvalue)
5600 if (ldata->lattr & LATTR_WRAPPED) {
5602 ldata2 = lineptr(p.y+1);
5603 if (wordtype(term, UCSGET(ldata2->chars, 0))
5620 if (wordtype(term, UCSGET(ldata->chars, p.x-1)) == wvalue)
5629 ldata2 = lineptr(p.y-1);
5630 maxcols = (ldata2->lattr & LATTR_WRAPPED2 ?
5631 term->cols-1 : term->cols);
5632 if (ldata2->lattr & LATTR_WRAPPED) {
5633 if (wordtype(term, UCSGET(ldata2->chars, maxcols-1))
5651 * In this mode, every line is a unit.
5653 p.x = (dir == -1 ? 0 : term->cols - 1);
5661 static void sel_spread(Terminal *term)
5663 if (term->seltype == LEXICOGRAPHIC) {
5664 term->selstart = sel_spread_half(term, term->selstart, -1);
5665 decpos(term->selend);
5666 term->selend = sel_spread_half(term, term->selend, +1);
5667 incpos(term->selend);
5671 void term_do_paste(Terminal *term)
5676 get_clip(term->frontend, &data, &len);
5677 if (data && len > 0) {
5680 term_seen_key_event(term); /* pasted data counts */
5682 if (term->paste_buffer)
5683 sfree(term->paste_buffer);
5684 term->paste_pos = term->paste_hold = term->paste_len = 0;
5685 term->paste_buffer = snewn(len, wchar_t);
5688 while (p < data + len) {
5689 while (p < data + len &&
5690 !(p <= data + len - sel_nl_sz &&
5691 !memcmp(p, sel_nl, sizeof(sel_nl))))
5696 for (i = 0; i < p - q; i++) {
5697 term->paste_buffer[term->paste_len++] = q[i];
5701 if (p <= data + len - sel_nl_sz &&
5702 !memcmp(p, sel_nl, sizeof(sel_nl))) {
5703 term->paste_buffer[term->paste_len++] = '\015';
5709 /* Assume a small paste will be OK in one go. */
5710 if (term->paste_len < 256) {
5712 luni_send(term->ldisc, term->paste_buffer, term->paste_len, 0);
5713 if (term->paste_buffer)
5714 sfree(term->paste_buffer);
5715 term->paste_buffer = 0;
5716 term->paste_pos = term->paste_hold = term->paste_len = 0;
5719 get_clip(term->frontend, NULL, NULL);
5722 void term_mouse(Terminal *term, Mouse_Button braw, Mouse_Button bcooked,
5723 Mouse_Action a, int x, int y, int shift, int ctrl, int alt)
5727 int raw_mouse = (term->xterm_mouse &&
5728 !term->no_mouse_rep &&
5729 !(term->mouse_override && shift));
5730 int default_seltype;
5734 if (a == MA_DRAG && !raw_mouse)
5735 term_scroll(term, 0, -1);
5737 if (y >= term->rows) {
5739 if (a == MA_DRAG && !raw_mouse)
5740 term_scroll(term, 0, +1);
5749 if (x >= term->cols)
5752 selpoint.y = y + term->disptop;
5753 ldata = lineptr(selpoint.y);
5755 if ((ldata->lattr & LATTR_MODE) != LATTR_NORM)
5759 * Transform x through the bidi algorithm to find the _logical_
5760 * click point from the physical one.
5762 if (term_bidi_line(term, ldata, y) != NULL) {
5763 x = term->post_bidi_cache[y].backward[x];
5770 * If we're in the middle of a selection operation, we ignore raw
5771 * mouse mode until it's done (we must have been not in raw mouse
5772 * mode when it started).
5773 * This makes use of Shift for selection reliable, and avoids the
5774 * host seeing mouse releases for which they never saw corresponding
5778 (term->selstate != ABOUT_TO) && (term->selstate != DRAGGING)) {
5779 int encstate = 0, r, c;
5786 encstate = 0x20; /* left button down */
5797 case MBT_WHEEL_DOWN:
5800 default: break; /* placate gcc warning about enum use */
5804 if (term->xterm_mouse == 1)
5810 term->mouse_is_down = 0;
5813 if (term->mouse_is_down == braw)
5815 term->mouse_is_down = braw;
5817 default: break; /* placate gcc warning about enum use */
5826 sprintf(abuf, "\033[M%c%c%c", encstate, c, r);
5827 ldisc_send(term->ldisc, abuf, 6, 0);
5833 * Set the selection type (rectangular or normal) at the start
5834 * of a selection attempt, from the state of Alt.
5836 if (!alt ^ !term->rect_select)
5837 default_seltype = RECTANGULAR;
5839 default_seltype = LEXICOGRAPHIC;
5841 if (term->selstate == NO_SELECTION) {
5842 term->seltype = default_seltype;
5845 if (bcooked == MBT_SELECT && a == MA_CLICK) {
5847 term->selstate = ABOUT_TO;
5848 term->seltype = default_seltype;
5849 term->selanchor = selpoint;
5850 term->selmode = SM_CHAR;
5851 } else if (bcooked == MBT_SELECT && (a == MA_2CLK || a == MA_3CLK)) {
5853 term->selmode = (a == MA_2CLK ? SM_WORD : SM_LINE);
5854 term->selstate = DRAGGING;
5855 term->selstart = term->selanchor = selpoint;
5856 term->selend = term->selstart;
5857 incpos(term->selend);
5859 } else if ((bcooked == MBT_SELECT && a == MA_DRAG) ||
5860 (bcooked == MBT_EXTEND && a != MA_RELEASE)) {
5861 if (term->selstate == ABOUT_TO && poseq(term->selanchor, selpoint))
5863 if (bcooked == MBT_EXTEND && a != MA_DRAG &&
5864 term->selstate == SELECTED) {
5865 if (term->seltype == LEXICOGRAPHIC) {
5867 * For normal selection, we extend by moving
5868 * whichever end of the current selection is closer
5871 if (posdiff(selpoint, term->selstart) <
5872 posdiff(term->selend, term->selstart) / 2) {
5873 term->selanchor = term->selend;
5874 decpos(term->selanchor);
5876 term->selanchor = term->selstart;
5880 * For rectangular selection, we have a choice of
5881 * _four_ places to put selanchor and selpoint: the
5882 * four corners of the selection.
5884 if (2*selpoint.x < term->selstart.x + term->selend.x)
5885 term->selanchor.x = term->selend.x-1;
5887 term->selanchor.x = term->selstart.x;
5889 if (2*selpoint.y < term->selstart.y + term->selend.y)
5890 term->selanchor.y = term->selend.y;
5892 term->selanchor.y = term->selstart.y;
5894 term->selstate = DRAGGING;
5896 if (term->selstate != ABOUT_TO && term->selstate != DRAGGING)
5897 term->selanchor = selpoint;
5898 term->selstate = DRAGGING;
5899 if (term->seltype == LEXICOGRAPHIC) {
5901 * For normal selection, we set (selstart,selend) to
5902 * (selpoint,selanchor) in some order.
5904 if (poslt(selpoint, term->selanchor)) {
5905 term->selstart = selpoint;
5906 term->selend = term->selanchor;
5907 incpos(term->selend);
5909 term->selstart = term->selanchor;
5910 term->selend = selpoint;
5911 incpos(term->selend);
5915 * For rectangular selection, we may need to
5916 * interchange x and y coordinates (if the user has
5917 * dragged in the -x and +y directions, or vice versa).
5919 term->selstart.x = min(term->selanchor.x, selpoint.x);
5920 term->selend.x = 1+max(term->selanchor.x, selpoint.x);
5921 term->selstart.y = min(term->selanchor.y, selpoint.y);
5922 term->selend.y = max(term->selanchor.y, selpoint.y);
5925 } else if ((bcooked == MBT_SELECT || bcooked == MBT_EXTEND) &&
5927 if (term->selstate == DRAGGING) {
5929 * We've completed a selection. We now transfer the
5930 * data to the clipboard.
5932 clipme(term, term->selstart, term->selend,
5933 (term->seltype == RECTANGULAR), FALSE);
5934 term->selstate = SELECTED;
5936 term->selstate = NO_SELECTION;
5937 } else if (bcooked == MBT_PASTE
5939 #if MULTICLICK_ONLY_EVENT
5940 || a == MA_2CLK || a == MA_3CLK
5943 request_paste(term->frontend);
5949 int format_arrow_key(char *buf, Terminal *term, int xkey, int ctrl)
5953 if (term->vt52_mode)
5954 p += sprintf((char *) p, "\x1B%c", xkey);
5956 int app_flg = (term->app_cursor_keys && !term->no_applic_c);
5959 * RDB: VT100 & VT102 manuals both state the app cursor
5960 * keys only work if the app keypad is on.
5962 * SGT: That may well be true, but xterm disagrees and so
5963 * does at least one application, so I've #if'ed this out
5964 * and the behaviour is back to PuTTY's original: app
5965 * cursor and app keypad are independently switchable
5966 * modes. If anyone complains about _this_ I'll have to
5967 * put in a configurable option.
5969 if (!term->app_keypad_keys)
5972 /* Useful mapping of Ctrl-arrows */
5977 p += sprintf((char *) p, "\x1BO%c", xkey);
5979 p += sprintf((char *) p, "\x1B[%c", xkey);
5985 void term_key(Terminal *term, Key_Sym keysym, wchar_t *text, size_t tlen,
5986 unsigned int modifiers, unsigned int flags)
5990 int prependesc = FALSE;
5994 fprintf(stderr, "keysym = %d, %d chars:", keysym, tlen);
5995 for (i = 0; i < tlen; i++)
5996 fprintf(stderr, " %04x", (unsigned)text[i]);
5997 fprintf(stderr, "\n");
6001 if ((flags & PKF_REPEAT) && term->repeat_off)
6004 /* Currently, Meta always just prefixes everything with ESC. */
6005 if (modifiers & PKM_META)
6007 modifiers &= ~PKM_META;
6010 * Alt is only used for Alt+keypad, which isn't supported yet, so
6013 modifiers &= ~PKM_ALT;
6015 /* Standard local function keys */
6016 switch (modifiers & (PKM_SHIFT | PKM_CONTROL)) {
6018 if (keysym == PK_PAGEUP)
6019 /* scroll up one page */;
6020 if (keysym == PK_PAGEDOWN)
6021 /* scroll down on page */;
6022 if (keysym == PK_INSERT)
6023 term_do_paste(term);
6026 if (keysym == PK_PAGEUP)
6027 /* scroll up one line */;
6028 if (keysym == PK_PAGEDOWN)
6029 /* scroll down one line */;
6030 /* Control-Numlock for app-keypad mode switch */
6031 if (keysym == PK_PF1)
6032 term->app_keypad_keys ^= 1;
6036 if (modifiers & PKM_ALT) {
6037 /* Alt+F4 (close) */
6038 /* Alt+Return (full screen) */
6039 /* Alt+Space (system menu) */
6042 if (keysym == PK_NULL && (modifiers & PKM_CONTROL) && tlen == 1 &&
6043 text[0] >= 0x20 && text[0] <= 0x7e) {
6044 /* ASCII chars + Control */
6045 if ((text[0] >= 0x40 && text[0] <= 0x5f) ||
6046 (text[0] >= 0x61 && text[0] <= 0x7a))
6050 * Control-2 should return ^@ (0x00), Control-6 should return
6051 * ^^ (0x1E), and Control-Minus should return ^_ (0x1F). Since
6052 * the DOS keyboard handling did it, and we have nothing better
6053 * to do with the key combo in question, we'll also map
6054 * Control-Backquote to ^\ (0x1C).
6057 case ' ': text[0] = 0x00; break;
6058 case '-': text[0] = 0x1f; break;
6059 case '/': text[0] = 0x1f; break;
6060 case '2': text[0] = 0x00; break;
6061 case '3': text[0] = 0x1b; break;
6062 case '4': text[0] = 0x1c; break;
6063 case '5': text[0] = 0x1d; break;
6064 case '6': text[0] = 0x1e; break;
6065 case '7': text[0] = 0x1f; break;
6066 case '8': text[0] = 0x7f; break;
6067 case '`': text[0] = 0x1c; break;
6072 /* Nethack keypad */
6073 if (term->nethack_keypad) {
6076 case PK_KP1: c = 'b'; break;
6077 case PK_KP2: c = 'j'; break;
6078 case PK_KP3: c = 'n'; break;
6079 case PK_KP4: c = 'h'; break;
6080 case PK_KP5: c = '.'; break;
6081 case PK_KP6: c = 'l'; break;
6082 case PK_KP7: c = 'y'; break;
6083 case PK_KP8: c = 'k'; break;
6084 case PK_KP9: c = 'u'; break;
6085 default: break; /* else gcc warns `enum value not used' */
6089 if (modifiers & PKM_CONTROL)
6091 else if (modifiers & PKM_SHIFT)
6092 c = toupper((unsigned char)c);
6099 /* Numeric Keypad */
6100 if (PK_ISKEYPAD(keysym)) {
6104 * In VT400 mode, PFn always emits an escape sequence. In
6105 * Linux and tilde modes, this only happens in app keypad mode.
6107 if (term->funky_type == FUNKY_VT400 ||
6108 ((term->funky_type == FUNKY_LINUX ||
6109 term->funky_type == FUNKY_TILDE) &&
6110 term->app_keypad_keys && !term->no_applic_k)) {
6112 case PK_PF1: xkey = 'P'; break;
6113 case PK_PF2: xkey = 'Q'; break;
6114 case PK_PF3: xkey = 'R'; break;
6115 case PK_PF4: xkey = 'S'; break;
6116 default: break; /* else gcc warns `enum value not used' */
6119 if (term->app_keypad_keys && !term->no_applic_k) {
6121 case PK_KP0: xkey = 'p'; break;
6122 case PK_KP1: xkey = 'q'; break;
6123 case PK_KP2: xkey = 'r'; break;
6124 case PK_KP3: xkey = 's'; break;
6125 case PK_KP4: xkey = 't'; break;
6126 case PK_KP5: xkey = 'u'; break;
6127 case PK_KP6: xkey = 'v'; break;
6128 case PK_KP7: xkey = 'w'; break;
6129 case PK_KP8: xkey = 'x'; break;
6130 case PK_KP9: xkey = 'y'; break;
6131 case PK_KPDECIMAL: xkey = 'n'; break;
6132 case PK_KPENTER: xkey = 'M'; break;
6133 default: break; /* else gcc warns `enum value not used' */
6135 if (term->funky_type == FUNKY_XTERM && tlen > 0) {
6137 * xterm can't see the layout of the keypad, so it has
6138 * to rely on the X keysyms returned by the keys.
6139 * Hence, we look at the strings here, not the PuTTY
6140 * keysyms (which describe the layout).
6144 if (modifiers & PKM_SHIFT)
6149 case '/': xkey = 'o'; break;
6150 case '*': xkey = 'j'; break;
6151 case '-': xkey = 'm'; break;
6155 * In all other modes, we try to retain the layout of
6156 * the DEC keypad in application mode.
6160 /* This key covers the '-' and ',' keys on a VT220 */
6161 if (modifiers & PKM_SHIFT)
6162 xkey = 'm'; /* VT220 '-' */
6164 xkey = 'l'; /* VT220 ',' */
6166 case PK_KPMINUS: xkey = 'm'; break;
6167 case PK_KPCOMMA: xkey = 'l'; break;
6168 default: break; /* else gcc warns `enum value not used' */
6173 if (term->vt52_mode) {
6174 if (xkey >= 'P' && xkey <= 'S')
6175 p += sprintf((char *) p, "\x1B%c", xkey);
6177 p += sprintf((char *) p, "\x1B?%c", xkey);
6179 p += sprintf((char *) p, "\x1BO%c", xkey);
6182 /* Not in application mode -- treat the number pad as arrow keys? */
6183 if ((flags & PKF_NUMLOCK) == 0) {
6185 case PK_KP0: keysym = PK_INSERT; break;
6186 case PK_KP1: keysym = PK_END; break;
6187 case PK_KP2: keysym = PK_DOWN; break;
6188 case PK_KP3: keysym = PK_PAGEDOWN; break;
6189 case PK_KP4: keysym = PK_LEFT; break;
6190 case PK_KP5: keysym = PK_REST; break;
6191 case PK_KP6: keysym = PK_RIGHT; break;
6192 case PK_KP7: keysym = PK_HOME; break;
6193 case PK_KP8: keysym = PK_UP; break;
6194 case PK_KP9: keysym = PK_PAGEUP; break;
6195 default: break; /* else gcc warns `enum value not used' */
6200 /* Miscellaneous keys */
6207 *p++ = (term->bksp_is_delete ? 0x7F : 0x08);
6208 else if (modifiers == PKM_SHIFT)
6209 /* We do the opposite of what is configured */
6210 *p++ = (term->bksp_is_delete ? 0x08 : 0x7F);
6216 else if (modifiers == PKM_SHIFT)
6217 *p++ = 0x1B, *p++ = '[', *p++ = 'Z';
6220 /* XXX window.c has ctrl+shift+space sending 0xa0 */
6222 if (modifiers == PKM_CONTROL)
6227 case PK_KPENTER: /* Odd keypad modes handled above */
6228 if (modifiers == 0) {
6230 if (term->cr_lf_return)
6234 default: break; /* else gcc warns `enum value not used' */
6237 /* SCO function keys and editing keys */
6238 if (term->funky_type == FUNKY_SCO) {
6239 if (PK_ISFKEY(keysym) && keysym <= PK_F12) {
6240 static char const codes[] =
6241 "MNOPQRSTUVWX" "YZabcdefghij" "klmnopqrstuv" "wxyz@[\\]^_`{";
6242 int index = keysym - PK_F1;
6244 if (modifiers & PKM_SHIFT) index += 12;
6245 if (modifiers & PKM_CONTROL) index += 24;
6246 p += sprintf((char *) p, "\x1B[%c", codes[index]);
6249 if (PK_ISEDITING(keysym)) {
6253 case PK_DELETE: *p++ = 0x7f; goto done;
6254 case PK_HOME: xkey = 'H'; break;
6255 case PK_INSERT: xkey = 'L'; break;
6256 case PK_END: xkey = 'F'; break;
6257 case PK_PAGEUP: xkey = 'I'; break;
6258 case PK_PAGEDOWN: xkey = 'G'; break;
6259 default: break; /* else gcc warns `enum value not used' */
6261 p += sprintf((char *) p, "\x1B[%c", xkey);
6265 if (PK_ISEDITING(keysym) && (modifiers & PKM_SHIFT) == 0) {
6268 if (term->funky_type == FUNKY_XTERM) {
6269 /* Xterm shuffles these keys, apparently. */
6271 case PK_HOME: keysym = PK_INSERT; break;
6272 case PK_INSERT: keysym = PK_HOME; break;
6273 case PK_DELETE: keysym = PK_END; break;
6274 case PK_END: keysym = PK_PAGEUP; break;
6275 case PK_PAGEUP: keysym = PK_DELETE; break;
6276 case PK_PAGEDOWN: keysym = PK_PAGEDOWN; break;
6277 default: break; /* else gcc warns `enum value not used' */
6282 if (term->rxvt_homeend &&
6283 (keysym == PK_HOME || keysym == PK_END)) {
6284 p += sprintf((char *) p, keysym == PK_HOME ? "\x1B[H" : "\x1BOw");
6288 if (term->vt52_mode) {
6292 * A real VT52 doesn't have these, and a VT220 doesn't
6293 * send anything for them in VT52 mode.
6296 case PK_HOME: xkey = 'H'; break;
6297 case PK_INSERT: xkey = 'L'; break;
6298 case PK_DELETE: xkey = 'M'; break;
6299 case PK_END: xkey = 'E'; break;
6300 case PK_PAGEUP: xkey = 'I'; break;
6301 case PK_PAGEDOWN: xkey = 'G'; break;
6302 default: xkey=0; break; /* else gcc warns `enum value not used'*/
6304 p += sprintf((char *) p, "\x1B%c", xkey);
6309 case PK_HOME: code = 1; break;
6310 case PK_INSERT: code = 2; break;
6311 case PK_DELETE: code = 3; break;
6312 case PK_END: code = 4; break;
6313 case PK_PAGEUP: code = 5; break;
6314 case PK_PAGEDOWN: code = 6; break;
6315 default: code = 0; break; /* else gcc warns `enum value not used' */
6317 p += sprintf((char *) p, "\x1B[%d~", code);
6321 if (PK_ISFKEY(keysym)) {
6322 /* Map Shift+F1-F10 to F11-F20 */
6323 if (keysym >= PK_F1 && keysym <= PK_F10 && (modifiers & PKM_SHIFT))
6325 if ((term->vt52_mode || term->funky_type == FUNKY_VT100P) &&
6327 /* XXX This overrides the XTERM/VT52 mode below */
6329 if (keysym >= PK_F6) offt++;
6330 if (keysym >= PK_F12) offt++;
6331 p += sprintf((char *) p, term->vt52_mode ? "\x1B%c" : "\x1BO%c",
6332 'P' + keysym - PK_F1 - offt);
6335 if (term->funky_type == FUNKY_LINUX && keysym <= PK_F5) {
6336 p += sprintf((char *) p, "\x1B[[%c", 'A' + keysym - PK_F1);
6339 if (term->funky_type == FUNKY_XTERM && keysym <= PK_F4) {
6340 if (term->vt52_mode)
6341 p += sprintf((char *) p, "\x1B%c", 'P' + keysym - PK_F1);
6343 p += sprintf((char *) p, "\x1BO%c", 'P' + keysym - PK_F1);
6346 p += sprintf((char *) p, "\x1B[%d~", 11 + keysym - PK_F1);
6350 if (PK_ISCURSOR(keysym)) {
6354 case PK_UP: xkey = 'A'; break;
6355 case PK_DOWN: xkey = 'B'; break;
6356 case PK_RIGHT: xkey = 'C'; break;
6357 case PK_LEFT: xkey = 'D'; break;
6358 case PK_REST: xkey = 'G'; break; /* centre key on number pad */
6359 default: xkey = 0; break; /* else gcc warns `enum value not used' */
6361 p += format_arrow_key(p, term, xkey, modifiers == PKM_CONTROL);
6366 if (p > output || tlen > 0) {
6368 * Interrupt an ongoing paste. I'm not sure
6369 * this is sensible, but for the moment it's
6370 * preferable to having to faff about buffering
6376 * We need not bother about stdin backlogs
6377 * here, because in GUI PuTTY we can't do
6378 * anything about it anyway; there's no means
6379 * of asking Windows to hold off on KEYDOWN
6380 * messages. We _have_ to buffer everything
6383 term_seen_key_event(term);
6387 fprintf(stderr, "sending ESC\n");
6389 ldisc_send(term->ldisc, "\x1b", 1, 1);
6394 fprintf(stderr, "sending %d bytes:", p - output);
6395 for (i = 0; i < p - output; i++)
6396 fprintf(stderr, " %02x", output[i]);
6397 fprintf(stderr, "\n");
6399 ldisc_send(term->ldisc, output, p - output, 1);
6400 } else if (tlen > 0) {
6402 fprintf(stderr, "sending %d unichars:", tlen);
6403 for (i = 0; i < tlen; i++)
6404 fprintf(stderr, " %04x", (unsigned) text[i]);
6405 fprintf(stderr, "\n");
6407 luni_send(term->ldisc, text, tlen, 1);
6412 void term_nopaste(Terminal *term)
6414 if (term->paste_len == 0)
6416 sfree(term->paste_buffer);
6417 term->paste_buffer = NULL;
6418 term->paste_len = 0;
6421 int term_paste_pending(Terminal *term)
6423 return term->paste_len != 0;
6426 void term_paste(Terminal *term)
6428 long now, paste_diff;
6430 if (term->paste_len == 0)
6433 /* Don't wait forever to paste */
6434 if (term->paste_hold) {
6435 now = GETTICKCOUNT();
6436 paste_diff = now - term->last_paste;
6437 if (paste_diff >= 0 && paste_diff < 450)
6440 term->paste_hold = 0;
6442 while (term->paste_pos < term->paste_len) {
6444 while (n + term->paste_pos < term->paste_len) {
6445 if (term->paste_buffer[term->paste_pos + n++] == '\015')
6449 luni_send(term->ldisc, term->paste_buffer + term->paste_pos, n, 0);
6450 term->paste_pos += n;
6452 if (term->paste_pos < term->paste_len) {
6453 term->paste_hold = 1;
6457 sfree(term->paste_buffer);
6458 term->paste_buffer = NULL;
6459 term->paste_len = 0;
6462 static void deselect(Terminal *term)
6464 term->selstate = NO_SELECTION;
6465 term->selstart.x = term->selstart.y = term->selend.x = term->selend.y = 0;
6468 void term_deselect(Terminal *term)
6474 int term_ldisc(Terminal *term, int option)
6476 if (option == LD_ECHO)
6477 return term->term_echoing;
6478 if (option == LD_EDIT)
6479 return term->term_editing;
6483 int term_data(Terminal *term, int is_stderr, const char *data, int len)
6485 bufchain_add(&term->inbuf, data, len);
6487 if (!term->in_term_out) {
6488 term->in_term_out = TRUE;
6489 term_reset_cblink(term);
6491 * During drag-selects, we do not process terminal input,
6492 * because the user will want the screen to hold still to
6495 if (term->selstate != DRAGGING)
6497 term->in_term_out = FALSE;
6501 * term_out() always completely empties inbuf. Therefore,
6502 * there's no reason at all to return anything other than zero
6503 * from this function, because there _can't_ be a question of
6504 * the remote side needing to wait until term_out() has cleared
6507 * This is a slightly suboptimal way to deal with SSH-2 - in
6508 * principle, the window mechanism would allow us to continue
6509 * to accept data on forwarded ports and X connections even
6510 * while the terminal processing was going slowly - but we
6511 * can't do the 100% right thing without moving the terminal
6512 * processing into a separate thread, and that might hurt
6513 * portability. So we manage stdout buffering the old SSH-1 way:
6514 * if the terminal processing goes slowly, the whole SSH
6515 * connection stops accepting data until it's ready.
6517 * In practice, I can't imagine this causing serious trouble.
6523 * Write untrusted data to the terminal.
6524 * The only control character that should be honoured is \n (which
6525 * will behave as a CRLF).
6527 int term_data_untrusted(Terminal *term, const char *data, int len)
6530 /* FIXME: more sophisticated checking? */
6531 for (i = 0; i < len; i++) {
6532 if (data[i] == '\n')
6533 term_data(term, 1, "\r\n", 2);
6534 else if (data[i] & 0x60)
6535 term_data(term, 1, data + i, 1);
6537 return 0; /* assumes that term_data() always returns 0 */
6540 void term_provide_logctx(Terminal *term, void *logctx)
6542 term->logctx = logctx;
6545 void term_set_focus(Terminal *term, int has_focus)
6547 term->has_focus = has_focus;
6548 term_schedule_cblink(term);
6552 * Provide "auto" settings for remote tty modes, suitable for an
6553 * application with a terminal window.
6555 char *term_get_ttymode(Terminal *term, const char *mode)
6558 if (strcmp(mode, "ERASE") == 0) {
6559 val = term->bksp_is_delete ? "^?" : "^H";
6561 /* FIXME: perhaps we should set ONLCR based on lfhascr as well? */
6562 /* FIXME: or ECHO and friends based on local echo state? */
6566 struct term_userpass_state {
6568 int done_prompt; /* printed out prompt yet? */
6569 size_t pos; /* cursor position */
6573 * Process some terminal data in the course of username/password
6576 int term_get_userpass_input(Terminal *term, prompts_t *p,
6577 unsigned char *in, int inlen)
6579 struct term_userpass_state *s = (struct term_userpass_state *)p->data;
6582 * First call. Set some stuff up.
6584 p->data = s = snew(struct term_userpass_state);
6587 /* We only print the `name' caption if we have to... */
6588 if (p->name_reqd && p->name) {
6589 size_t l = strlen(p->name);
6590 term_data_untrusted(term, p->name, l);
6591 if (p->name[l-1] != '\n')
6592 term_data_untrusted(term, "\n", 1);
6594 /* ...but we always print any `instruction'. */
6595 if (p->instruction) {
6596 size_t l = strlen(p->instruction);
6597 term_data_untrusted(term, p->instruction, l);
6598 if (p->instruction[l-1] != '\n')
6599 term_data_untrusted(term, "\n", 1);
6602 * Zero all the results, in case we abort half-way through.
6606 for (i = 0; i < (int)p->n_prompts; i++)
6607 prompt_set_result(p->prompts[i], "");
6611 while (s->curr_prompt < p->n_prompts) {
6613 prompt_t *pr = p->prompts[s->curr_prompt];
6614 int finished_prompt = 0;
6616 if (!s->done_prompt) {
6617 term_data_untrusted(term, pr->prompt, strlen(pr->prompt));
6622 /* Breaking out here ensures that the prompt is printed even
6623 * if we're now waiting for user data. */
6624 if (!in || !inlen) break;
6626 /* FIXME: should we be using local-line-editing code instead? */
6627 while (!finished_prompt && inlen) {
6633 term_data(term, 0, "\r\n", 2);
6634 prompt_ensure_result_size(pr, s->pos + 1);
6635 pr->result[s->pos] = '\0';
6636 /* go to next prompt, if any */
6639 finished_prompt = 1; /* break out */
6645 term_data(term, 0, "\b \b", 3);
6651 while (s->pos > 0) {
6653 term_data(term, 0, "\b \b", 3);
6659 /* Immediate abort. */
6660 term_data(term, 0, "\r\n", 2);
6663 return 0; /* user abort */
6666 * This simplistic check for printability is disabled
6667 * when we're doing password input, because some people
6668 * have control characters in their passwords.
6670 if (!pr->echo || (c >= ' ' && c <= '~') ||
6671 ((unsigned char) c >= 160)) {
6672 prompt_ensure_result_size(pr, s->pos + 1);
6673 pr->result[s->pos++] = c;
6675 term_data(term, 0, &c, 1);
6683 if (s->curr_prompt < p->n_prompts) {
6684 return -1; /* more data required */
6688 return +1; /* all done */