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 check_line_size(Terminal *, termline *);
102 static void do_paint(Terminal *, Context, int);
103 static void erase_lots(Terminal *, int, int, int);
104 static int find_last_nonempty_line(Terminal *, tree234 *);
105 static void swap_screen(Terminal *, int, int, int);
106 static void update_sbar(Terminal *);
107 static void deselect(Terminal *);
108 static void term_print_finish(Terminal *);
109 static void scroll(Terminal *, int, int, int, int);
110 #ifdef OPTIMISE_SCROLL
111 static void scroll_display(Terminal *, int, int, int);
112 #endif /* OPTIMISE_SCROLL */
114 static termline *newline(Terminal *term, int cols, int bce)
119 line = snew(termline);
120 line->chars = snewn(cols, termchar);
121 for (j = 0; j < cols; j++)
122 line->chars[j] = (bce ? term->erase_char : term->basic_erase_char);
123 line->cols = line->size = cols;
124 line->lattr = LATTR_NORM;
125 line->temporary = FALSE;
131 static void freeline(termline *line)
139 static void unlineptr(termline *line)
147 * Diagnostic function: verify that a termline has a correct
148 * combining character structure.
150 * This is a performance-intensive check, so it's no longer enabled
153 static void cc_check(termline *line)
155 unsigned char *flags;
158 assert(line->size >= line->cols);
160 flags = snewn(line->size, unsigned char);
162 for (i = 0; i < line->size; i++)
163 flags[i] = (i < line->cols);
165 for (i = 0; i < line->cols; i++) {
167 while (line->chars[j].cc_next) {
168 j += line->chars[j].cc_next;
169 assert(j >= line->cols && j < line->size);
178 assert(j >= line->cols && j < line->size);
181 if (line->chars[j].cc_next)
182 j += line->chars[j].cc_next;
189 for (i = 0; i < line->size; i++)
190 j += (flags[i] != 0);
192 assert(j == line->size);
199 * Add a combining character to a character cell.
201 static void add_cc(termline *line, int col, unsigned long chr)
205 assert(col >= 0 && col < line->cols);
208 * Start by extending the cols array if the free list is empty.
210 if (!line->cc_free) {
212 line->size += 16 + (line->size - line->cols) / 2;
213 line->chars = sresize(line->chars, line->size, termchar);
215 while (n < line->size) {
216 if (n+1 < line->size)
217 line->chars[n].cc_next = 1;
219 line->chars[n].cc_next = 0;
225 * Now walk the cc list of the cell in question.
227 while (line->chars[col].cc_next)
228 col += line->chars[col].cc_next;
231 * `col' now points at the last cc currently in this cell; so
232 * we simply add another one.
234 newcc = line->cc_free;
235 if (line->chars[newcc].cc_next)
236 line->cc_free = newcc + line->chars[newcc].cc_next;
239 line->chars[newcc].cc_next = 0;
240 line->chars[newcc].chr = chr;
241 line->chars[col].cc_next = newcc - col;
249 * Clear the combining character list in a character cell.
251 static void clear_cc(termline *line, int col)
253 int oldfree, origcol = col;
255 assert(col >= 0 && col < line->cols);
257 if (!line->chars[col].cc_next)
258 return; /* nothing needs doing */
260 oldfree = line->cc_free;
261 line->cc_free = col + line->chars[col].cc_next;
262 while (line->chars[col].cc_next)
263 col += line->chars[col].cc_next;
265 line->chars[col].cc_next = oldfree - col;
267 line->chars[col].cc_next = 0;
269 line->chars[origcol].cc_next = 0;
277 * Compare two character cells for equality. Special case required
278 * in do_paint() where we override what we expect the chr and attr
281 static int termchars_equal_override(termchar *a, termchar *b,
282 unsigned long bchr, unsigned long battr)
287 if ((a->attr &~ DATTR_MASK) != (battr &~ DATTR_MASK))
289 while (a->cc_next || b->cc_next) {
290 if (!a->cc_next || !b->cc_next)
291 return FALSE; /* one cc-list ends, other does not */
294 if (a->chr != b->chr)
300 static int termchars_equal(termchar *a, termchar *b)
302 return termchars_equal_override(a, b, b->chr, b->attr);
306 * Copy a character cell. (Requires a pointer to the destination
307 * termline, so as to access its free list.)
309 static void copy_termchar(termline *destline, int x, termchar *src)
311 clear_cc(destline, x);
313 destline->chars[x] = *src; /* copy everything except cc-list */
314 destline->chars[x].cc_next = 0; /* and make sure this is zero */
316 while (src->cc_next) {
318 add_cc(destline, x, src->chr);
327 * Move a character cell within its termline.
329 static void move_termchar(termline *line, termchar *dest, termchar *src)
331 /* First clear the cc list from the original char, just in case. */
332 clear_cc(line, dest - line->chars);
334 /* Move the character cell and adjust its cc_next. */
335 *dest = *src; /* copy everything except cc-list */
337 dest->cc_next = src->cc_next - (dest-src);
339 /* Ensure the original cell doesn't have a cc list. */
348 * Compress and decompress a termline into an RLE-based format for
349 * storing in scrollback. (Since scrollback almost never needs to
350 * be modified and exists in huge quantities, this is a sensible
351 * tradeoff, particularly since it allows us to continue adding
352 * features to the main termchar structure without proportionally
353 * bloating the terminal emulator's memory footprint unless those
354 * features are in constant use.)
360 static void add(struct buf *b, unsigned char c)
362 if (b->len >= b->size) {
363 b->size = (b->len * 3 / 2) + 512;
364 b->data = sresize(b->data, b->size, unsigned char);
366 b->data[b->len++] = c;
368 static int get(struct buf *b)
370 return b->data[b->len++];
372 static void makerle(struct buf *b, termline *ldata,
373 void (*makeliteral)(struct buf *b, termchar *c,
374 unsigned long *state))
376 int hdrpos, hdrsize, n, prevlen, prevpos, thislen, thispos, prev2;
377 termchar *c = ldata->chars;
378 unsigned long state = 0, oldstate;
385 prevlen = prevpos = 0;
390 makeliteral(b, c++, &state);
391 thislen = b->len - thispos;
392 if (thislen == prevlen &&
393 !memcmp(b->data + prevpos, b->data + thispos, thislen)) {
395 * This literal precisely matches the previous one.
396 * Turn it into a run if it's worthwhile.
398 * With one-byte literals, it costs us two bytes to
399 * encode a run, plus another byte to write the header
400 * to resume normal output; so a three-element run is
401 * neutral, and anything beyond that is unconditionally
402 * worthwhile. With two-byte literals or more, even a
405 if (thislen > 1 || prev2) {
409 * It's worth encoding a run. Start at prevpos,
410 * unless hdrsize==0 in which case we can back up
411 * another one and start by overwriting hdrpos.
414 hdrsize--; /* remove the literal at prevpos */
418 prevpos -= prevlen;/* and possibly another one */
422 assert(prevpos == hdrpos + 1);
424 b->len = prevpos+prevlen;
426 memmove(b->data + prevpos+1, b->data + prevpos, prevlen);
428 b->len = prevpos+prevlen+1;
430 * Terminate the previous run of ordinary
433 assert(hdrsize >= 1 && hdrsize <= 128);
434 b->data[hdrpos] = hdrsize - 1;
437 runlen = prev2 ? 3 : 2;
439 while (n > 0 && runlen < 129) {
443 makeliteral(b, c, &state);
444 tmplen = b->len - tmppos;
446 if (tmplen != thislen ||
447 memcmp(b->data + runpos+1, b->data + tmppos, tmplen)) {
449 break; /* run over */
454 assert(runlen >= 2 && runlen <= 129);
455 b->data[runpos] = runlen + 0x80 - 2;
460 /* And ensure this run doesn't interfere with the next. */
461 prevlen = prevpos = 0;
467 * Just flag that the previous two literals were
468 * identical, in case we find a third identical one
469 * we want to turn into a run.
482 * This character isn't (yet) part of a run. Add it to
486 if (hdrsize == 128) {
487 b->data[hdrpos] = hdrsize - 1;
491 prevlen = prevpos = 0;
500 assert(hdrsize <= 128);
501 b->data[hdrpos] = hdrsize - 1;
506 static void makeliteral_chr(struct buf *b, termchar *c, unsigned long *state)
509 * My encoding for characters is UTF-8-like, in that it stores
510 * 7-bit ASCII in one byte and uses high-bit-set bytes as
511 * introducers to indicate a longer sequence. However, it's
512 * unlike UTF-8 in that it doesn't need to be able to
513 * resynchronise, and therefore I don't want to waste two bits
514 * per byte on having recognisable continuation characters.
515 * Also I don't want to rule out the possibility that I may one
516 * day use values 0x80000000-0xFFFFFFFF for interesting
517 * purposes, so unlike UTF-8 I need a full 32-bit range.
518 * Accordingly, here is my encoding:
520 * 00000000-0000007F: 0xxxxxxx (but see below)
521 * 00000080-00003FFF: 10xxxxxx xxxxxxxx
522 * 00004000-001FFFFF: 110xxxxx xxxxxxxx xxxxxxxx
523 * 00200000-0FFFFFFF: 1110xxxx xxxxxxxx xxxxxxxx xxxxxxxx
524 * 10000000-FFFFFFFF: 11110ZZZ xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx
526 * (`Z' is like `x' but is always going to be zero since the
527 * values I'm encoding don't go above 2^32. In principle the
528 * five-byte form of the encoding could extend to 2^35, and
529 * there could be six-, seven-, eight- and nine-byte forms as
530 * well to allow up to 64-bit values to be encoded. But that's
531 * completely unnecessary for these purposes!)
533 * The encoding as written above would be very simple, except
534 * that 7-bit ASCII can occur in several different ways in the
535 * terminal data; sometimes it crops up in the D800 page
536 * (CSET_ASCII) but at other times it's in the 0000 page (real
537 * Unicode). Therefore, this encoding is actually _stateful_:
538 * the one-byte encoding of 00-7F actually indicates `reuse the
539 * upper three bytes of the last character', and to encode an
540 * absolute value of 00-7F you need to use the two-byte form
543 if ((c->chr & ~0x7F) == *state) {
544 add(b, (unsigned char)(c->chr & 0x7F));
545 } else if (c->chr < 0x4000) {
546 add(b, (unsigned char)(((c->chr >> 8) & 0x3F) | 0x80));
547 add(b, (unsigned char)(c->chr & 0xFF));
548 } else if (c->chr < 0x200000) {
549 add(b, (unsigned char)(((c->chr >> 16) & 0x1F) | 0xC0));
550 add(b, (unsigned char)((c->chr >> 8) & 0xFF));
551 add(b, (unsigned char)(c->chr & 0xFF));
552 } else if (c->chr < 0x10000000) {
553 add(b, (unsigned char)(((c->chr >> 24) & 0x0F) | 0xE0));
554 add(b, (unsigned char)((c->chr >> 16) & 0xFF));
555 add(b, (unsigned char)((c->chr >> 8) & 0xFF));
556 add(b, (unsigned char)(c->chr & 0xFF));
559 add(b, (unsigned char)((c->chr >> 24) & 0xFF));
560 add(b, (unsigned char)((c->chr >> 16) & 0xFF));
561 add(b, (unsigned char)((c->chr >> 8) & 0xFF));
562 add(b, (unsigned char)(c->chr & 0xFF));
564 *state = c->chr & ~0xFF;
566 static void makeliteral_attr(struct buf *b, termchar *c, unsigned long *state)
569 * My encoding for attributes is 16-bit-granular and assumes
570 * that the top bit of the word is never required. I either
571 * store a two-byte value with the top bit clear (indicating
572 * just that value), or a four-byte value with the top bit set
573 * (indicating the same value with its top bit clear).
575 * However, first I permute the bits of the attribute value, so
576 * that the eight bits of colour (four in each of fg and bg)
577 * which are never non-zero unless xterm 256-colour mode is in
578 * use are placed higher up the word than everything else. This
579 * ensures that attribute values remain 16-bit _unless_ the
580 * user uses extended colour.
582 unsigned attr, colourbits;
586 assert(ATTR_BGSHIFT > ATTR_FGSHIFT);
588 colourbits = (attr >> (ATTR_BGSHIFT + 4)) & 0xF;
590 colourbits |= (attr >> (ATTR_FGSHIFT + 4)) & 0xF;
592 attr = (((attr >> (ATTR_BGSHIFT + 8)) << (ATTR_BGSHIFT + 4)) |
593 (attr & ((1 << (ATTR_BGSHIFT + 4))-1)));
594 attr = (((attr >> (ATTR_FGSHIFT + 8)) << (ATTR_FGSHIFT + 4)) |
595 (attr & ((1 << (ATTR_FGSHIFT + 4))-1)));
597 attr |= (colourbits << (32-9));
600 add(b, (unsigned char)((attr >> 8) & 0xFF));
601 add(b, (unsigned char)(attr & 0xFF));
603 add(b, (unsigned char)(((attr >> 24) & 0x7F) | 0x80));
604 add(b, (unsigned char)((attr >> 16) & 0xFF));
605 add(b, (unsigned char)((attr >> 8) & 0xFF));
606 add(b, (unsigned char)(attr & 0xFF));
609 static void makeliteral_cc(struct buf *b, termchar *c, unsigned long *state)
612 * For combining characters, I just encode a bunch of ordinary
613 * chars using makeliteral_chr, and terminate with a \0
614 * character (which I know won't come up as a combining char
617 * I don't use the stateful encoding in makeliteral_chr.
619 unsigned long zstate;
628 makeliteral_chr(b, c, &zstate);
633 makeliteral_chr(b, &z, &zstate);
636 static termline *decompressline(unsigned char *data, int *bytes_used);
638 static unsigned char *compressline(termline *ldata)
640 struct buf buffer = { NULL, 0, 0 }, *b = &buffer;
643 * First, store the column count, 7 bits at a time, least
644 * significant `digit' first, with the high bit set on all but
650 add(b, (unsigned char)((n & 0x7F) | 0x80));
653 add(b, (unsigned char)(n));
657 * Next store the lattrs; same principle.
660 int n = ldata->lattr;
662 add(b, (unsigned char)((n & 0x7F) | 0x80));
665 add(b, (unsigned char)(n));
669 * Now we store a sequence of separate run-length encoded
670 * fragments, each containing exactly as many symbols as there
671 * are columns in the ldata.
673 * All of these have a common basic format:
675 * - a byte 00-7F indicates that X+1 literals follow it
676 * - a byte 80-FF indicates that a single literal follows it
677 * and expects to be repeated (X-0x80)+2 times.
679 * The format of the `literals' varies between the fragments.
681 makerle(b, ldata, makeliteral_chr);
682 makerle(b, ldata, makeliteral_attr);
683 makerle(b, ldata, makeliteral_cc);
686 * Diagnostics: ensure that the compressed data really does
687 * decompress to the right thing.
689 * This is a bit performance-heavy for production code.
692 #ifndef CHECK_SB_COMPRESSION
698 #ifdef DIAGNOSTIC_SB_COMPRESSION
699 for (i = 0; i < b->len; i++) {
700 printf(" %02x ", b->data[i]);
705 dcl = decompressline(b->data, &dused);
706 assert(b->len == dused);
707 assert(ldata->cols == dcl->cols);
708 assert(ldata->lattr == dcl->lattr);
709 for (i = 0; i < ldata->cols; i++)
710 assert(termchars_equal(&ldata->chars[i], &dcl->chars[i]));
712 #ifdef DIAGNOSTIC_SB_COMPRESSION
713 printf("%d cols (%d bytes) -> %d bytes (factor of %g)\n",
714 ldata->cols, 4 * ldata->cols, dused,
715 (double)dused / (4 * ldata->cols));
721 #endif /* TERM_CC_DIAGS */
724 * Trim the allocated memory so we don't waste any, and return.
726 return sresize(b->data, b->len, unsigned char);
729 static void readrle(struct buf *b, termline *ldata,
730 void (*readliteral)(struct buf *b, termchar *c,
731 termline *ldata, unsigned long *state))
734 unsigned long state = 0;
736 while (n < ldata->cols) {
742 int pos = b->len, count = hdr + 2 - 0x80;
744 assert(n < ldata->cols);
746 readliteral(b, ldata->chars + n, ldata, &state);
750 /* Just a sequence of consecutive literals. */
754 assert(n < ldata->cols);
755 readliteral(b, ldata->chars + n, ldata, &state);
761 assert(n == ldata->cols);
763 static void readliteral_chr(struct buf *b, termchar *c, termline *ldata,
764 unsigned long *state)
769 * 00000000-0000007F: 0xxxxxxx
770 * 00000080-00003FFF: 10xxxxxx xxxxxxxx
771 * 00004000-001FFFFF: 110xxxxx xxxxxxxx xxxxxxxx
772 * 00200000-0FFFFFFF: 1110xxxx xxxxxxxx xxxxxxxx xxxxxxxx
773 * 10000000-FFFFFFFF: 11110ZZZ xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx
778 c->chr = byte | *state;
779 } else if (byte < 0xC0) {
780 c->chr = (byte &~ 0xC0) << 8;
782 } else if (byte < 0xE0) {
783 c->chr = (byte &~ 0xE0) << 16;
784 c->chr |= get(b) << 8;
786 } else if (byte < 0xF0) {
787 c->chr = (byte &~ 0xF0) << 24;
788 c->chr |= get(b) << 16;
789 c->chr |= get(b) << 8;
792 assert(byte == 0xF0);
793 c->chr = get(b) << 24;
794 c->chr |= get(b) << 16;
795 c->chr |= get(b) << 8;
798 *state = c->chr & ~0xFF;
800 static void readliteral_attr(struct buf *b, termchar *c, termline *ldata,
801 unsigned long *state)
803 unsigned val, attr, colourbits;
815 colourbits = (val >> (32-9)) & 0xFF;
816 attr = (val & ((1<<(32-9))-1));
818 attr = (((attr >> (ATTR_FGSHIFT + 4)) << (ATTR_FGSHIFT + 8)) |
819 (attr & ((1 << (ATTR_FGSHIFT + 4))-1)));
820 attr = (((attr >> (ATTR_BGSHIFT + 4)) << (ATTR_BGSHIFT + 8)) |
821 (attr & ((1 << (ATTR_BGSHIFT + 4))-1)));
823 attr |= (colourbits >> 4) << (ATTR_BGSHIFT + 4);
824 attr |= (colourbits & 0xF) << (ATTR_FGSHIFT + 4);
828 static void readliteral_cc(struct buf *b, termchar *c, termline *ldata,
829 unsigned long *state)
832 unsigned long zstate;
833 int x = c - ldata->chars;
839 readliteral_chr(b, &n, ldata, &zstate);
842 add_cc(ldata, x, n.chr);
846 static termline *decompressline(unsigned char *data, int *bytes_used)
848 int ncols, byte, shift;
849 struct buf buffer, *b = &buffer;
856 * First read in the column count.
861 ncols |= (byte & 0x7F) << shift;
863 } while (byte & 0x80);
866 * Now create the output termline.
868 ldata = snew(termline);
869 ldata->chars = snewn(ncols, termchar);
870 ldata->cols = ldata->size = ncols;
871 ldata->temporary = TRUE;
875 * We must set all the cc pointers in ldata->chars to 0 right
876 * now, so that cc diagnostics that verify the integrity of the
877 * whole line will make sense while we're in the middle of
882 for (i = 0; i < ldata->cols; i++)
883 ldata->chars[i].cc_next = 0;
887 * Now read in the lattr.
889 ldata->lattr = shift = 0;
892 ldata->lattr |= (byte & 0x7F) << shift;
894 } while (byte & 0x80);
897 * Now we read in each of the RLE streams in turn.
899 readrle(b, ldata, readliteral_chr);
900 readrle(b, ldata, readliteral_attr);
901 readrle(b, ldata, readliteral_cc);
903 /* Return the number of bytes read, for diagnostic purposes. */
905 *bytes_used = b->len;
911 * Resize a line to make it `cols' columns wide.
913 static void resizeline(Terminal *term, termline *line, int cols)
917 if (line->cols != cols) {
919 oldcols = line->cols;
922 * This line is the wrong length, which probably means it
923 * hasn't been accessed since a resize. Resize it now.
925 * First, go through all the characters that will be thrown
926 * out in the resize (if we're shrinking the line) and
927 * return their cc lists to the cc free list.
929 for (i = cols; i < oldcols; i++)
933 * If we're shrinking the line, we now bodily move the
934 * entire cc section from where it started to where it now
935 * needs to be. (We have to do this before the resize, so
936 * that the data we're copying is still there. However, if
937 * we're expanding, we have to wait until _after_ the
938 * resize so that the space we're copying into is there.)
941 memmove(line->chars + cols, line->chars + oldcols,
942 (line->size - line->cols) * TSIZE);
945 * Now do the actual resize, leaving the _same_ amount of
946 * cc space as there was to begin with.
948 line->size += cols - oldcols;
949 line->chars = sresize(line->chars, line->size, TTYPE);
953 * If we're expanding the line, _now_ we move the cc
957 memmove(line->chars + cols, line->chars + oldcols,
958 (line->size - line->cols) * TSIZE);
961 * Go through what's left of the original line, and adjust
962 * the first cc_next pointer in each list. (All the
963 * subsequent ones are still valid because they are
964 * relative offsets within the cc block.) Also do the same
965 * to the head of the cc_free list.
967 for (i = 0; i < oldcols && i < cols; i++)
968 if (line->chars[i].cc_next)
969 line->chars[i].cc_next += cols - oldcols;
971 line->cc_free += cols - oldcols;
974 * And finally fill in the new space with erase chars. (We
975 * don't have to worry about cc lists here, because we
976 * _know_ the erase char doesn't have one.)
978 for (i = oldcols; i < cols; i++)
979 line->chars[i] = term->basic_erase_char;
988 * Get the number of lines in the scrollback.
990 static int sblines(Terminal *term)
992 int sblines = count234(term->scrollback);
993 if (term->erase_to_scrollback &&
994 term->alt_which && term->alt_screen) {
995 sblines += term->alt_sblines;
1001 * Retrieve a line of the screen or of the scrollback, according to
1002 * whether the y coordinate is non-negative or negative
1005 static termline *lineptr(Terminal *term, int y, int lineno, int screen)
1012 whichtree = term->screen;
1019 if (term->erase_to_scrollback &&
1020 term->alt_which && term->alt_screen) {
1021 altlines = term->alt_sblines;
1023 if (y < -altlines) {
1024 whichtree = term->scrollback;
1025 treeindex = y + altlines + count234(term->scrollback);
1027 whichtree = term->alt_screen;
1028 treeindex = y + term->alt_sblines;
1029 /* treeindex = y + count234(term->alt_screen); */
1032 if (whichtree == term->scrollback) {
1033 unsigned char *cline = index234(whichtree, treeindex);
1034 line = decompressline(cline, NULL);
1036 line = index234(whichtree, treeindex);
1039 /* We assume that we don't screw up and retrieve something out of range. */
1041 fatalbox("line==NULL in terminal.c\n"
1042 "lineno=%d y=%d w=%d h=%d\n"
1043 "count(scrollback=%p)=%d\n"
1044 "count(screen=%p)=%d\n"
1045 "count(alt=%p)=%d alt_sblines=%d\n"
1046 "whichtree=%p treeindex=%d\n\n"
1047 "Please contact <putty@projects.tartarus.org> "
1048 "and pass on the above information.",
1049 lineno, y, term->cols, term->rows,
1050 term->scrollback, count234(term->scrollback),
1051 term->screen, count234(term->screen),
1052 term->alt_screen, count234(term->alt_screen), term->alt_sblines,
1053 whichtree, treeindex);
1055 assert(line != NULL);
1058 * Here we resize lines to _at least_ the right length, but we
1059 * don't truncate them. Truncation is done as a side effect of
1060 * modifying the line.
1062 * The point of this policy is to try to arrange that resizing the
1063 * terminal window repeatedly - e.g. successive steps in an X11
1064 * opaque window-resize drag, or resizing as a side effect of
1065 * retiling by tiling WMs such as xmonad - does not throw away
1066 * data gratuitously. Specifically, we want a sequence of resize
1067 * operations with no terminal output between them to have the
1068 * same effect as a single resize to the ultimate terminal size,
1069 * and also (for the case in which xmonad narrows a window that's
1070 * scrolling things) we want scrolling up new text at the bottom
1071 * of a narrowed window to avoid truncating lines further up when
1072 * the window is re-widened.
1074 if (term->cols > line->cols)
1075 resizeline(term, line, term->cols);
1080 #define lineptr(x) (lineptr)(term,x,__LINE__,FALSE)
1081 #define scrlineptr(x) (lineptr)(term,x,__LINE__,TRUE)
1084 * Coerce a termline to the terminal's current width. Unlike the
1085 * optional resize in lineptr() above, this is potentially destructive
1086 * of text, since it can shrink as well as grow the line.
1088 * We call this whenever a termline is actually going to be modified.
1089 * Helpfully, putting a single call to this function in check_boundary
1090 * deals with _nearly_ all such cases, leaving only a few things like
1091 * bulk erase and ESC#8 to handle separately.
1093 static void check_line_size(Terminal *term, termline *line)
1095 if (term->cols != line->cols) /* trivial optimisation */
1096 resizeline(term, line, term->cols);
1099 static void term_schedule_tblink(Terminal *term);
1100 static void term_schedule_cblink(Terminal *term);
1102 static void term_timer(void *ctx, unsigned long now)
1104 Terminal *term = (Terminal *)ctx;
1107 if (term->tblink_pending && now == term->next_tblink) {
1108 term->tblinker = !term->tblinker;
1109 term->tblink_pending = FALSE;
1110 term_schedule_tblink(term);
1114 if (term->cblink_pending && now == term->next_cblink) {
1115 term->cblinker = !term->cblinker;
1116 term->cblink_pending = FALSE;
1117 term_schedule_cblink(term);
1121 if (term->in_vbell && now == term->vbell_end) {
1122 term->in_vbell = FALSE;
1127 (term->window_update_pending && now == term->next_update))
1131 static void term_schedule_update(Terminal *term)
1133 if (!term->window_update_pending) {
1134 term->window_update_pending = TRUE;
1135 term->next_update = schedule_timer(UPDATE_DELAY, term_timer, term);
1140 * Call this whenever the terminal window state changes, to queue
1143 static void seen_disp_event(Terminal *term)
1145 term->seen_disp_event = TRUE; /* for scrollback-reset-on-activity */
1146 term_schedule_update(term);
1150 * Call when the terminal's blinking-text settings change, or when
1151 * a text blink has just occurred.
1153 static void term_schedule_tblink(Terminal *term)
1155 if (term->blink_is_real) {
1156 if (!term->tblink_pending)
1157 term->next_tblink = schedule_timer(TBLINK_DELAY, term_timer, term);
1158 term->tblink_pending = TRUE;
1160 term->tblinker = 1; /* reset when not in use */
1161 term->tblink_pending = FALSE;
1166 * Likewise with cursor blinks.
1168 static void term_schedule_cblink(Terminal *term)
1170 if (term->blink_cur && term->has_focus) {
1171 if (!term->cblink_pending)
1172 term->next_cblink = schedule_timer(CBLINK_DELAY, term_timer, term);
1173 term->cblink_pending = TRUE;
1175 term->cblinker = 1; /* reset when not in use */
1176 term->cblink_pending = FALSE;
1181 * Call to reset cursor blinking on new output.
1183 static void term_reset_cblink(Terminal *term)
1185 seen_disp_event(term);
1187 term->cblink_pending = FALSE;
1188 term_schedule_cblink(term);
1192 * Call to begin a visual bell.
1194 static void term_schedule_vbell(Terminal *term, int already_started,
1197 long ticks_already_gone;
1199 if (already_started)
1200 ticks_already_gone = GETTICKCOUNT() - startpoint;
1202 ticks_already_gone = 0;
1204 if (ticks_already_gone < VBELL_DELAY) {
1205 term->in_vbell = TRUE;
1206 term->vbell_end = schedule_timer(VBELL_DELAY - ticks_already_gone,
1209 term->in_vbell = FALSE;
1214 * Set up power-on settings for the terminal.
1215 * If 'clear' is false, don't actually clear the primary screen, and
1216 * position the cursor below the last non-blank line (scrolling if
1219 static void power_on(Terminal *term, int clear)
1221 term->alt_x = term->alt_y = 0;
1222 term->savecurs.x = term->savecurs.y = 0;
1223 term->alt_savecurs.x = term->alt_savecurs.y = 0;
1224 term->alt_t = term->marg_t = 0;
1225 if (term->rows != -1)
1226 term->alt_b = term->marg_b = term->rows - 1;
1228 term->alt_b = term->marg_b = 0;
1229 if (term->cols != -1) {
1231 for (i = 0; i < term->cols; i++)
1232 term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
1234 term->alt_om = term->dec_om = conf_get_int(term->conf, CONF_dec_om);
1235 term->alt_ins = term->insert = FALSE;
1236 term->alt_wnext = term->wrapnext =
1237 term->save_wnext = term->alt_save_wnext = FALSE;
1238 term->alt_wrap = term->wrap = conf_get_int(term->conf, CONF_wrap_mode);
1239 term->alt_cset = term->cset = term->save_cset = term->alt_save_cset = 0;
1240 term->alt_utf = term->utf = term->save_utf = term->alt_save_utf = 0;
1241 term->utf_state = 0;
1242 term->alt_sco_acs = term->sco_acs =
1243 term->save_sco_acs = term->alt_save_sco_acs = 0;
1244 term->cset_attr[0] = term->cset_attr[1] =
1245 term->save_csattr = term->alt_save_csattr = CSET_ASCII;
1247 term->in_vbell = FALSE;
1248 term->cursor_on = 1;
1249 term->big_cursor = 0;
1250 term->default_attr = term->save_attr =
1251 term->alt_save_attr = term->curr_attr = ATTR_DEFAULT;
1252 term->term_editing = term->term_echoing = FALSE;
1253 term->app_cursor_keys = conf_get_int(term->conf, CONF_app_cursor);
1254 term->app_keypad_keys = conf_get_int(term->conf, CONF_app_keypad);
1255 term->use_bce = conf_get_int(term->conf, CONF_bce);
1256 term->blink_is_real = conf_get_int(term->conf, CONF_blinktext);
1257 term->erase_char = term->basic_erase_char;
1258 term->alt_which = 0;
1259 term_print_finish(term);
1260 term->xterm_mouse = 0;
1261 term->xterm_extended_mouse = 0;
1262 term->urxvt_extended_mouse = 0;
1263 set_raw_mouse_mode(term->frontend, FALSE);
1264 term->bracketed_paste = FALSE;
1267 for (i = 0; i < 256; i++)
1268 term->wordness[i] = conf_get_int_int(term->conf, CONF_wordness, i);
1271 swap_screen(term, 1, FALSE, FALSE);
1272 erase_lots(term, FALSE, TRUE, TRUE);
1273 swap_screen(term, 0, FALSE, FALSE);
1275 erase_lots(term, FALSE, TRUE, TRUE);
1276 term->curs.y = find_last_nonempty_line(term, term->screen) + 1;
1277 if (term->curs.y == term->rows) {
1279 scroll(term, 0, term->rows - 1, 1, TRUE);
1285 term_schedule_tblink(term);
1286 term_schedule_cblink(term);
1290 * Force a screen update.
1292 void term_update(Terminal *term)
1296 term->window_update_pending = FALSE;
1298 ctx = get_ctx(term->frontend);
1300 int need_sbar_update = term->seen_disp_event;
1301 if (term->seen_disp_event && term->scroll_on_disp) {
1302 term->disptop = 0; /* return to main screen */
1303 term->seen_disp_event = 0;
1304 need_sbar_update = TRUE;
1307 if (need_sbar_update)
1309 do_paint(term, ctx, TRUE);
1310 sys_cursor(term->frontend, term->curs.x, term->curs.y - term->disptop);
1316 * Called from front end when a keypress occurs, to trigger
1317 * anything magical that needs to happen in that situation.
1319 void term_seen_key_event(Terminal *term)
1322 * On any keypress, clear the bell overload mechanism
1323 * completely, on the grounds that large numbers of
1324 * beeps coming from deliberate key action are likely
1325 * to be intended (e.g. beeps from filename completion
1326 * blocking repeatedly).
1328 term->beep_overloaded = FALSE;
1329 while (term->beephead) {
1330 struct beeptime *tmp = term->beephead;
1331 term->beephead = tmp->next;
1334 term->beeptail = NULL;
1338 * Reset the scrollback on keypress, if we're doing that.
1340 if (term->scroll_on_key) {
1341 term->disptop = 0; /* return to main screen */
1342 seen_disp_event(term);
1347 * Same as power_on(), but an external function.
1349 void term_pwron(Terminal *term, int clear)
1351 power_on(term, clear);
1352 if (term->ldisc) /* cause ldisc to notice changes */
1353 ldisc_send(term->ldisc, NULL, 0, 0);
1359 static void set_erase_char(Terminal *term)
1361 term->erase_char = term->basic_erase_char;
1363 term->erase_char.attr = (term->curr_attr &
1364 (ATTR_FGMASK | ATTR_BGMASK));
1368 * We copy a bunch of stuff out of the Conf structure into local
1369 * fields in the Terminal structure, to avoid the repeated tree234
1370 * lookups which would be involved in fetching them from the former
1373 void term_copy_stuff_from_conf(Terminal *term)
1375 term->ansi_colour = conf_get_int(term->conf, CONF_ansi_colour);
1376 term->arabicshaping = conf_get_int(term->conf, CONF_arabicshaping);
1377 term->beep = conf_get_int(term->conf, CONF_beep);
1378 term->bellovl = conf_get_int(term->conf, CONF_bellovl);
1379 term->bellovl_n = conf_get_int(term->conf, CONF_bellovl_n);
1380 term->bellovl_s = conf_get_int(term->conf, CONF_bellovl_s);
1381 term->bellovl_t = conf_get_int(term->conf, CONF_bellovl_t);
1382 term->bidi = conf_get_int(term->conf, CONF_bidi);
1383 term->bksp_is_delete = conf_get_int(term->conf, CONF_bksp_is_delete);
1384 term->blink_cur = conf_get_int(term->conf, CONF_blink_cur);
1385 term->blinktext = conf_get_int(term->conf, CONF_blinktext);
1386 term->cjk_ambig_wide = conf_get_int(term->conf, CONF_cjk_ambig_wide);
1387 term->conf_height = conf_get_int(term->conf, CONF_height);
1388 term->conf_width = conf_get_int(term->conf, CONF_width);
1389 term->crhaslf = conf_get_int(term->conf, CONF_crhaslf);
1390 term->erase_to_scrollback = conf_get_int(term->conf, CONF_erase_to_scrollback);
1391 term->funky_type = conf_get_int(term->conf, CONF_funky_type);
1392 term->lfhascr = conf_get_int(term->conf, CONF_lfhascr);
1393 term->logflush = conf_get_int(term->conf, CONF_logflush);
1394 term->logtype = conf_get_int(term->conf, CONF_logtype);
1395 term->mouse_override = conf_get_int(term->conf, CONF_mouse_override);
1396 term->nethack_keypad = conf_get_int(term->conf, CONF_nethack_keypad);
1397 term->no_alt_screen = conf_get_int(term->conf, CONF_no_alt_screen);
1398 term->no_applic_c = conf_get_int(term->conf, CONF_no_applic_c);
1399 term->no_applic_k = conf_get_int(term->conf, CONF_no_applic_k);
1400 term->no_dbackspace = conf_get_int(term->conf, CONF_no_dbackspace);
1401 term->no_mouse_rep = conf_get_int(term->conf, CONF_no_mouse_rep);
1402 term->no_remote_charset = conf_get_int(term->conf, CONF_no_remote_charset);
1403 term->no_remote_resize = conf_get_int(term->conf, CONF_no_remote_resize);
1404 term->no_remote_wintitle = conf_get_int(term->conf, CONF_no_remote_wintitle);
1405 term->rawcnp = conf_get_int(term->conf, CONF_rawcnp);
1406 term->rect_select = conf_get_int(term->conf, CONF_rect_select);
1407 term->remote_qtitle_action = conf_get_int(term->conf, CONF_remote_qtitle_action);
1408 term->rxvt_homeend = conf_get_int(term->conf, CONF_rxvt_homeend);
1409 term->scroll_on_disp = conf_get_int(term->conf, CONF_scroll_on_disp);
1410 term->scroll_on_key = conf_get_int(term->conf, CONF_scroll_on_key);
1411 term->xterm_256_colour = conf_get_int(term->conf, CONF_xterm_256_colour);
1414 * Parse the control-character escapes in the configured
1415 * answerback string.
1418 char *answerback = conf_get_str(term->conf, CONF_answerback);
1419 int maxlen = strlen(answerback);
1421 term->answerback = snewn(maxlen, char);
1422 term->answerbacklen = 0;
1424 while (*answerback) {
1426 char c = ctrlparse(answerback, &n);
1428 term->answerback[term->answerbacklen++] = c;
1431 term->answerback[term->answerbacklen++] = *answerback++;
1438 * When the user reconfigures us, we need to check the forbidden-
1439 * alternate-screen config option, disable raw mouse mode if the
1440 * user has disabled mouse reporting, and abandon a print job if
1441 * the user has disabled printing.
1443 void term_reconfig(Terminal *term, Conf *conf)
1446 * Before adopting the new config, check all those terminal
1447 * settings which control power-on defaults; and if they've
1448 * changed, we will modify the current state as well as the
1449 * default one. The full list is: Auto wrap mode, DEC Origin
1450 * Mode, BCE, blinking text, character classes.
1452 int reset_wrap, reset_decom, reset_bce, reset_tblink, reset_charclass;
1455 reset_wrap = (conf_get_int(term->conf, CONF_wrap_mode) !=
1456 conf_get_int(conf, CONF_wrap_mode));
1457 reset_decom = (conf_get_int(term->conf, CONF_dec_om) !=
1458 conf_get_int(conf, CONF_dec_om));
1459 reset_bce = (conf_get_int(term->conf, CONF_bce) !=
1460 conf_get_int(conf, CONF_bce));
1461 reset_tblink = (conf_get_int(term->conf, CONF_blinktext) !=
1462 conf_get_int(conf, CONF_blinktext));
1463 reset_charclass = 0;
1464 for (i = 0; i < 256; i++)
1465 if (conf_get_int_int(term->conf, CONF_wordness, i) !=
1466 conf_get_int_int(conf, CONF_wordness, i))
1467 reset_charclass = 1;
1470 * If the bidi or shaping settings have changed, flush the bidi
1473 if (conf_get_int(term->conf, CONF_arabicshaping) !=
1474 conf_get_int(conf, CONF_arabicshaping) ||
1475 conf_get_int(term->conf, CONF_bidi) !=
1476 conf_get_int(conf, CONF_bidi)) {
1477 for (i = 0; i < term->bidi_cache_size; i++) {
1478 sfree(term->pre_bidi_cache[i].chars);
1479 sfree(term->post_bidi_cache[i].chars);
1480 term->pre_bidi_cache[i].width = -1;
1481 term->pre_bidi_cache[i].chars = NULL;
1482 term->post_bidi_cache[i].width = -1;
1483 term->post_bidi_cache[i].chars = NULL;
1487 conf_free(term->conf);
1488 term->conf = conf_copy(conf);
1491 term->alt_wrap = term->wrap = conf_get_int(term->conf, CONF_wrap_mode);
1493 term->alt_om = term->dec_om = conf_get_int(term->conf, CONF_dec_om);
1495 term->use_bce = conf_get_int(term->conf, CONF_bce);
1496 set_erase_char(term);
1499 term->blink_is_real = conf_get_int(term->conf, CONF_blinktext);
1501 if (reset_charclass)
1502 for (i = 0; i < 256; i++)
1503 term->wordness[i] = conf_get_int_int(term->conf, CONF_wordness, i);
1505 if (conf_get_int(term->conf, CONF_no_alt_screen))
1506 swap_screen(term, 0, FALSE, FALSE);
1507 if (conf_get_int(term->conf, CONF_no_mouse_rep)) {
1508 term->xterm_mouse = 0;
1509 set_raw_mouse_mode(term->frontend, 0);
1511 if (conf_get_int(term->conf, CONF_no_remote_charset)) {
1512 term->cset_attr[0] = term->cset_attr[1] = CSET_ASCII;
1513 term->sco_acs = term->alt_sco_acs = 0;
1516 if (!conf_get_str(term->conf, CONF_printer)) {
1517 term_print_finish(term);
1519 term_schedule_tblink(term);
1520 term_schedule_cblink(term);
1521 term_copy_stuff_from_conf(term);
1525 * Clear the scrollback.
1527 void term_clrsb(Terminal *term)
1529 unsigned char *line;
1533 * Scroll forward to the current screen, if we were back in the
1534 * scrollback somewhere until now.
1539 * Clear the actual scrollback.
1541 while ((line = delpos234(term->scrollback, 0)) != NULL) {
1542 sfree(line); /* this is compressed data, not a termline */
1546 * When clearing the scrollback, we also truncate any termlines on
1547 * the current screen which have remembered data from a previous
1548 * larger window size. Rationale: clearing the scrollback is
1549 * sometimes done to protect privacy, so the user intention is
1550 * specifically that we should not retain evidence of what
1551 * previously happened in the terminal, and that ought to include
1552 * evidence to the right as well as evidence above.
1554 for (i = 0; i < term->rows; i++)
1555 check_line_size(term, scrlineptr(i));
1558 * There are now no lines of real scrollback which can be pulled
1559 * back into the screen by a resize, and no lines of the alternate
1560 * screen which should be displayed as if part of the scrollback.
1562 term->tempsblines = 0;
1563 term->alt_sblines = 0;
1566 * Update the scrollbar to reflect the new state of the world.
1572 * Initialise the terminal.
1574 Terminal *term_init(Conf *myconf, struct unicode_data *ucsdata,
1580 * Allocate a new Terminal structure and initialise the fields
1583 term = snew(Terminal);
1584 term->frontend = frontend;
1585 term->ucsdata = ucsdata;
1586 term->conf = conf_copy(myconf);
1587 term->logctx = NULL;
1588 term->compatibility_level = TM_PUTTY;
1589 strcpy(term->id_string, "\033[?6c");
1590 term->cblink_pending = term->tblink_pending = FALSE;
1591 term->paste_buffer = NULL;
1592 term->paste_len = 0;
1593 bufchain_init(&term->inbuf);
1594 bufchain_init(&term->printer_buf);
1595 term->printing = term->only_printing = FALSE;
1596 term->print_job = NULL;
1597 term->vt52_mode = FALSE;
1598 term->cr_lf_return = FALSE;
1599 term->seen_disp_event = FALSE;
1600 term->mouse_is_down = FALSE;
1601 term->reset_132 = FALSE;
1602 term->cblinker = term->tblinker = 0;
1603 term->has_focus = 1;
1604 term->repeat_off = FALSE;
1605 term->termstate = TOPLEVEL;
1606 term->selstate = NO_SELECTION;
1609 term_copy_stuff_from_conf(term);
1611 term->screen = term->alt_screen = term->scrollback = NULL;
1612 term->tempsblines = 0;
1613 term->alt_sblines = 0;
1615 term->disptext = NULL;
1616 term->dispcursx = term->dispcursy = -1;
1619 term->rows = term->cols = -1;
1620 power_on(term, TRUE);
1621 term->beephead = term->beeptail = NULL;
1622 #ifdef OPTIMISE_SCROLL
1623 term->scrollhead = term->scrolltail = NULL;
1624 #endif /* OPTIMISE_SCROLL */
1626 term->lastbeep = FALSE;
1627 term->beep_overloaded = FALSE;
1628 term->attr_mask = 0xffffffff;
1629 term->resize_fn = NULL;
1630 term->resize_ctx = NULL;
1631 term->in_term_out = FALSE;
1633 term->ltemp_size = 0;
1634 term->wcFrom = NULL;
1636 term->wcFromTo_size = 0;
1638 term->window_update_pending = FALSE;
1640 term->bidi_cache_size = 0;
1641 term->pre_bidi_cache = term->post_bidi_cache = NULL;
1644 term->basic_erase_char.chr = CSET_ASCII | ' ';
1645 term->basic_erase_char.attr = ATTR_DEFAULT;
1646 term->basic_erase_char.cc_next = 0;
1647 term->erase_char = term->basic_erase_char;
1652 void term_free(Terminal *term)
1655 struct beeptime *beep;
1658 while ((line = delpos234(term->scrollback, 0)) != NULL)
1659 sfree(line); /* compressed data, not a termline */
1660 freetree234(term->scrollback);
1661 while ((line = delpos234(term->screen, 0)) != NULL)
1663 freetree234(term->screen);
1664 while ((line = delpos234(term->alt_screen, 0)) != NULL)
1666 freetree234(term->alt_screen);
1667 if (term->disptext) {
1668 for (i = 0; i < term->rows; i++)
1669 freeline(term->disptext[i]);
1671 sfree(term->disptext);
1672 while (term->beephead) {
1673 beep = term->beephead;
1674 term->beephead = beep->next;
1677 bufchain_clear(&term->inbuf);
1679 printer_finish_job(term->print_job);
1680 bufchain_clear(&term->printer_buf);
1681 sfree(term->paste_buffer);
1683 sfree(term->wcFrom);
1686 for (i = 0; i < term->bidi_cache_size; i++) {
1687 sfree(term->pre_bidi_cache[i].chars);
1688 sfree(term->post_bidi_cache[i].chars);
1689 sfree(term->post_bidi_cache[i].forward);
1690 sfree(term->post_bidi_cache[i].backward);
1692 sfree(term->pre_bidi_cache);
1693 sfree(term->post_bidi_cache);
1697 expire_timer_context(term);
1699 conf_free(term->conf);
1705 * Set up the terminal for a given size.
1707 void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
1710 termline **newdisp, *line;
1711 int i, j, oldrows = term->rows;
1713 int save_alt_which = term->alt_which;
1715 if (newrows == term->rows && newcols == term->cols &&
1716 newsavelines == term->savelines)
1717 return; /* nothing to do */
1719 /* Behave sensibly if we're given zero (or negative) rows/cols */
1721 if (newrows < 1) newrows = 1;
1722 if (newcols < 1) newcols = 1;
1725 swap_screen(term, 0, FALSE, FALSE);
1727 term->alt_t = term->marg_t = 0;
1728 term->alt_b = term->marg_b = newrows - 1;
1730 if (term->rows == -1) {
1731 term->scrollback = newtree234(NULL);
1732 term->screen = newtree234(NULL);
1733 term->tempsblines = 0;
1738 * Resize the screen and scrollback. We only need to shift
1739 * lines around within our data structures, because lineptr()
1740 * will take care of resizing each individual line if
1743 * - If the new screen is longer, we shunt lines in from temporary
1744 * scrollback if possible, otherwise we add new blank lines at
1747 * - If the new screen is shorter, we remove any blank lines at
1748 * the bottom if possible, otherwise shunt lines above the cursor
1749 * to scrollback if possible, otherwise delete lines below the
1752 * - Then, if the new scrollback length is less than the
1753 * amount of scrollback we actually have, we must throw some
1756 sblen = count234(term->scrollback);
1757 /* Do this loop to expand the screen if newrows > rows */
1758 assert(term->rows == count234(term->screen));
1759 while (term->rows < newrows) {
1760 if (term->tempsblines > 0) {
1761 unsigned char *cline;
1762 /* Insert a line from the scrollback at the top of the screen. */
1763 assert(sblen >= term->tempsblines);
1764 cline = delpos234(term->scrollback, --sblen);
1765 line = decompressline(cline, NULL);
1767 line->temporary = FALSE; /* reconstituted line is now real */
1768 term->tempsblines -= 1;
1769 addpos234(term->screen, line, 0);
1771 term->savecurs.y += 1;
1773 term->alt_savecurs.y += 1;
1775 /* Add a new blank line at the bottom of the screen. */
1776 line = newline(term, newcols, FALSE);
1777 addpos234(term->screen, line, count234(term->screen));
1781 /* Do this loop to shrink the screen if newrows < rows */
1782 while (term->rows > newrows) {
1783 if (term->curs.y < term->rows - 1) {
1784 /* delete bottom row, unless it contains the cursor */
1785 line = delpos234(term->screen, term->rows - 1);
1788 /* push top row to scrollback */
1789 line = delpos234(term->screen, 0);
1790 addpos234(term->scrollback, compressline(line), sblen++);
1792 term->tempsblines += 1;
1794 term->savecurs.y -= 1;
1796 term->alt_savecurs.y -= 1;
1800 assert(term->rows == newrows);
1801 assert(count234(term->screen) == newrows);
1803 /* Delete any excess lines from the scrollback. */
1804 while (sblen > newsavelines) {
1805 line = delpos234(term->scrollback, 0);
1809 if (sblen < term->tempsblines)
1810 term->tempsblines = sblen;
1811 assert(count234(term->scrollback) <= newsavelines);
1812 assert(count234(term->scrollback) >= term->tempsblines);
1815 /* Make a new displayed text buffer. */
1816 newdisp = snewn(newrows, termline *);
1817 for (i = 0; i < newrows; i++) {
1818 newdisp[i] = newline(term, newcols, FALSE);
1819 for (j = 0; j < newcols; j++)
1820 newdisp[i]->chars[j].attr = ATTR_INVALID;
1822 if (term->disptext) {
1823 for (i = 0; i < oldrows; i++)
1824 freeline(term->disptext[i]);
1826 sfree(term->disptext);
1827 term->disptext = newdisp;
1828 term->dispcursx = term->dispcursy = -1;
1830 /* Make a new alternate screen. */
1831 newalt = newtree234(NULL);
1832 for (i = 0; i < newrows; i++) {
1833 line = newline(term, newcols, TRUE);
1834 addpos234(newalt, line, i);
1836 if (term->alt_screen) {
1837 while (NULL != (line = delpos234(term->alt_screen, 0)))
1839 freetree234(term->alt_screen);
1841 term->alt_screen = newalt;
1842 term->alt_sblines = 0;
1844 term->tabs = sresize(term->tabs, newcols, unsigned char);
1847 for (i = (term->cols > 0 ? term->cols : 0); i < newcols; i++)
1848 term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
1851 /* Check that the cursor positions are still valid. */
1852 if (term->savecurs.y < 0)
1853 term->savecurs.y = 0;
1854 if (term->savecurs.y >= newrows)
1855 term->savecurs.y = newrows - 1;
1856 if (term->savecurs.x >= newcols)
1857 term->savecurs.x = newcols - 1;
1858 if (term->alt_savecurs.y < 0)
1859 term->alt_savecurs.y = 0;
1860 if (term->alt_savecurs.y >= newrows)
1861 term->alt_savecurs.y = newrows - 1;
1862 if (term->alt_savecurs.x >= newcols)
1863 term->alt_savecurs.x = newcols - 1;
1864 if (term->curs.y < 0)
1866 if (term->curs.y >= newrows)
1867 term->curs.y = newrows - 1;
1868 if (term->curs.x >= newcols)
1869 term->curs.x = newcols - 1;
1870 if (term->alt_y < 0)
1872 if (term->alt_y >= newrows)
1873 term->alt_y = newrows - 1;
1874 if (term->alt_x >= newcols)
1875 term->alt_x = newcols - 1;
1876 term->alt_x = term->alt_y = 0;
1877 term->wrapnext = term->alt_wnext = FALSE;
1879 term->rows = newrows;
1880 term->cols = newcols;
1881 term->savelines = newsavelines;
1883 swap_screen(term, save_alt_which, FALSE, FALSE);
1887 if (term->resize_fn)
1888 term->resize_fn(term->resize_ctx, term->cols, term->rows);
1892 * Hand a function and context pointer to the terminal which it can
1893 * use to notify a back end of resizes.
1895 void term_provide_resize_fn(Terminal *term,
1896 void (*resize_fn)(void *, int, int),
1899 term->resize_fn = resize_fn;
1900 term->resize_ctx = resize_ctx;
1901 if (resize_fn && term->cols > 0 && term->rows > 0)
1902 resize_fn(resize_ctx, term->cols, term->rows);
1905 /* Find the bottom line on the screen that has any content.
1906 * If only the top line has content, returns 0.
1907 * If no lines have content, return -1.
1909 static int find_last_nonempty_line(Terminal * term, tree234 * screen)
1912 for (i = count234(screen) - 1; i >= 0; i--) {
1913 termline *line = index234(screen, i);
1915 for (j = 0; j < line->cols; j++)
1916 if (!termchars_equal(&line->chars[j], &term->erase_char))
1918 if (j != line->cols) break;
1924 * Swap screens. If `reset' is TRUE and we have been asked to
1925 * switch to the alternate screen, we must bring most of its
1926 * configuration from the main screen and erase the contents of the
1927 * alternate screen completely. (This is even true if we're already
1928 * on it! Blame xterm.)
1930 static void swap_screen(Terminal *term, int which, int reset, int keep_cur_pos)
1937 reset = FALSE; /* do no weird resetting if which==0 */
1939 if (which != term->alt_which) {
1940 term->alt_which = which;
1942 ttr = term->alt_screen;
1943 term->alt_screen = term->screen;
1945 term->alt_sblines = find_last_nonempty_line(term, term->alt_screen) + 1;
1947 if (!reset && !keep_cur_pos)
1948 term->curs.x = term->alt_x;
1951 if (!reset && !keep_cur_pos)
1952 term->curs.y = term->alt_y;
1955 if (!reset) term->marg_t = term->alt_t;
1958 if (!reset) term->marg_b = term->alt_b;
1961 if (!reset) term->dec_om = term->alt_om;
1964 if (!reset) term->wrap = term->alt_wrap;
1967 if (!reset) term->wrapnext = term->alt_wnext;
1968 term->alt_wnext = t;
1970 if (!reset) term->insert = term->alt_ins;
1973 if (!reset) term->cset = term->alt_cset;
1976 if (!reset) term->utf = term->alt_utf;
1979 if (!reset) term->sco_acs = term->alt_sco_acs;
1980 term->alt_sco_acs = t;
1982 tp = term->savecurs;
1983 if (!reset && !keep_cur_pos)
1984 term->savecurs = term->alt_savecurs;
1985 term->alt_savecurs = tp;
1986 t = term->save_cset;
1987 if (!reset && !keep_cur_pos)
1988 term->save_cset = term->alt_save_cset;
1989 term->alt_save_cset = t;
1990 t = term->save_csattr;
1991 if (!reset && !keep_cur_pos)
1992 term->save_csattr = term->alt_save_csattr;
1993 term->alt_save_csattr = t;
1994 t = term->save_attr;
1995 if (!reset && !keep_cur_pos)
1996 term->save_attr = term->alt_save_attr;
1997 term->alt_save_attr = t;
1999 if (!reset && !keep_cur_pos)
2000 term->save_utf = term->alt_save_utf;
2001 term->alt_save_utf = t;
2002 t = term->save_wnext;
2003 if (!reset && !keep_cur_pos)
2004 term->save_wnext = term->alt_save_wnext;
2005 term->alt_save_wnext = t;
2006 t = term->save_sco_acs;
2007 if (!reset && !keep_cur_pos)
2008 term->save_sco_acs = term->alt_save_sco_acs;
2009 term->alt_save_sco_acs = t;
2012 if (reset && term->screen) {
2014 * Yes, this _is_ supposed to honour background-colour-erase.
2016 erase_lots(term, FALSE, TRUE, TRUE);
2021 * Update the scroll bar.
2023 static void update_sbar(Terminal *term)
2025 int nscroll = sblines(term);
2026 set_sbar(term->frontend, nscroll + term->rows,
2027 nscroll + term->disptop, term->rows);
2031 * Check whether the region bounded by the two pointers intersects
2032 * the scroll region, and de-select the on-screen selection if so.
2034 static void check_selection(Terminal *term, pos from, pos to)
2036 if (poslt(from, term->selend) && poslt(term->selstart, to))
2041 * Scroll the screen. (`lines' is +ve for scrolling forward, -ve
2042 * for backward.) `sb' is TRUE if the scrolling is permitted to
2043 * affect the scrollback buffer.
2045 static void scroll(Terminal *term, int topline, int botline, int lines, int sb)
2048 int i, seltop, scrollwinsize;
2049 #ifdef OPTIMISE_SCROLL
2050 int olddisptop, shift;
2051 #endif /* OPTIMISE_SCROLL */
2053 if (topline != 0 || term->alt_which != 0)
2056 #ifdef OPTIMISE_SCROLL
2057 olddisptop = term->disptop;
2059 #endif /* OPTIMISE_SCROLL */
2061 scrollwinsize = botline - topline + 1;
2065 if (lines > scrollwinsize)
2066 lines = scrollwinsize;
2067 while (lines-- > 0) {
2068 line = delpos234(term->screen, botline);
2069 resizeline(term, line, term->cols);
2070 for (i = 0; i < term->cols; i++)
2071 copy_termchar(line, i, &term->erase_char);
2072 line->lattr = LATTR_NORM;
2073 addpos234(term->screen, line, topline);
2075 if (term->selstart.y >= topline && term->selstart.y <= botline) {
2077 if (term->selstart.y > botline) {
2078 term->selstart.y = botline + 1;
2079 term->selstart.x = 0;
2082 if (term->selend.y >= topline && term->selend.y <= botline) {
2084 if (term->selend.y > botline) {
2085 term->selend.y = botline + 1;
2091 if (lines > scrollwinsize)
2092 lines = scrollwinsize;
2093 while (lines-- > 0) {
2094 line = delpos234(term->screen, topline);
2095 #ifdef TERM_CC_DIAGS
2098 if (sb && term->savelines > 0) {
2099 int sblen = count234(term->scrollback);
2101 * We must add this line to the scrollback. We'll
2102 * remove a line from the top of the scrollback if
2103 * the scrollback is full.
2105 if (sblen == term->savelines) {
2106 unsigned char *cline;
2109 cline = delpos234(term->scrollback, 0);
2112 term->tempsblines += 1;
2114 addpos234(term->scrollback, compressline(line), sblen);
2116 /* now `line' itself can be reused as the bottom line */
2119 * If the user is currently looking at part of the
2120 * scrollback, and they haven't enabled any options
2121 * that are going to reset the scrollback as a
2122 * result of this movement, then the chances are
2123 * they'd like to keep looking at the same line. So
2124 * we move their viewpoint at the same rate as the
2125 * scroll, at least until their viewpoint hits the
2126 * top end of the scrollback buffer, at which point
2127 * we don't have the choice any more.
2129 * Thanks to Jan Holmen Holsten for the idea and
2130 * initial implementation.
2132 if (term->disptop > -term->savelines && term->disptop < 0)
2135 resizeline(term, line, term->cols);
2136 for (i = 0; i < term->cols; i++)
2137 copy_termchar(line, i, &term->erase_char);
2138 line->lattr = LATTR_NORM;
2139 addpos234(term->screen, line, botline);
2142 * If the selection endpoints move into the scrollback,
2143 * we keep them moving until they hit the top. However,
2144 * of course, if the line _hasn't_ moved into the
2145 * scrollback then we don't do this, and cut them off
2146 * at the top of the scroll region.
2148 * This applies to selstart and selend (for an existing
2149 * selection), and also selanchor (for one being
2150 * selected as we speak).
2152 seltop = sb ? -term->savelines : topline;
2154 if (term->selstate != NO_SELECTION) {
2155 if (term->selstart.y >= seltop &&
2156 term->selstart.y <= botline) {
2158 if (term->selstart.y < seltop) {
2159 term->selstart.y = seltop;
2160 term->selstart.x = 0;
2163 if (term->selend.y >= seltop && term->selend.y <= botline) {
2165 if (term->selend.y < seltop) {
2166 term->selend.y = seltop;
2170 if (term->selanchor.y >= seltop &&
2171 term->selanchor.y <= botline) {
2172 term->selanchor.y--;
2173 if (term->selanchor.y < seltop) {
2174 term->selanchor.y = seltop;
2175 term->selanchor.x = 0;
2181 #ifdef OPTIMISE_SCROLL
2182 shift += term->disptop - olddisptop;
2183 if (shift < term->rows && shift > -term->rows && shift != 0)
2184 scroll_display(term, topline, botline, shift);
2185 #endif /* OPTIMISE_SCROLL */
2188 #ifdef OPTIMISE_SCROLL
2190 * Add a scroll of a region on the screen into the pending scroll list.
2191 * `lines' is +ve for scrolling forward, -ve for backward.
2193 * If the scroll is on the same area as the last scroll in the list,
2196 static void save_scroll(Terminal *term, int topline, int botline, int lines)
2198 struct scrollregion *newscroll;
2199 if (term->scrolltail &&
2200 term->scrolltail->topline == topline &&
2201 term->scrolltail->botline == botline) {
2202 term->scrolltail->lines += lines;
2204 newscroll = snew(struct scrollregion);
2205 newscroll->topline = topline;
2206 newscroll->botline = botline;
2207 newscroll->lines = lines;
2208 newscroll->next = NULL;
2210 if (!term->scrollhead)
2211 term->scrollhead = newscroll;
2213 term->scrolltail->next = newscroll;
2214 term->scrolltail = newscroll;
2219 * Scroll the physical display, and our conception of it in disptext.
2221 static void scroll_display(Terminal *term, int topline, int botline, int lines)
2223 int distance, nlines, i, j;
2225 distance = lines > 0 ? lines : -lines;
2226 nlines = botline - topline + 1 - distance;
2228 for (i = 0; i < nlines; i++)
2229 for (j = 0; j < term->cols; j++)
2230 copy_termchar(term->disptext[i], j,
2231 term->disptext[i+distance]->chars+j);
2232 if (term->dispcursy >= 0 &&
2233 term->dispcursy >= topline + distance &&
2234 term->dispcursy < topline + distance + nlines)
2235 term->dispcursy -= distance;
2236 for (i = 0; i < distance; i++)
2237 for (j = 0; j < term->cols; j++)
2238 term->disptext[nlines+i]->chars[j].attr |= ATTR_INVALID;
2240 for (i = nlines; i-- ;)
2241 for (j = 0; j < term->cols; j++)
2242 copy_termchar(term->disptext[i+distance], j,
2243 term->disptext[i]->chars+j);
2244 if (term->dispcursy >= 0 &&
2245 term->dispcursy >= topline &&
2246 term->dispcursy < topline + nlines)
2247 term->dispcursy += distance;
2248 for (i = 0; i < distance; i++)
2249 for (j = 0; j < term->cols; j++)
2250 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
2252 save_scroll(term, topline, botline, lines);
2254 #endif /* OPTIMISE_SCROLL */
2257 * Move the cursor to a given position, clipping at boundaries. We
2258 * may or may not want to clip at the scroll margin: marg_clip is 0
2259 * not to, 1 to disallow _passing_ the margins, and 2 to disallow
2260 * even _being_ outside the margins.
2262 static void move(Terminal *term, int x, int y, int marg_clip)
2266 if (x >= term->cols)
2269 if ((term->curs.y >= term->marg_t || marg_clip == 2) &&
2272 if ((term->curs.y <= term->marg_b || marg_clip == 2) &&
2278 if (y >= term->rows)
2282 term->wrapnext = FALSE;
2286 * Save or restore the cursor and SGR mode.
2288 static void save_cursor(Terminal *term, int save)
2291 term->savecurs = term->curs;
2292 term->save_attr = term->curr_attr;
2293 term->save_cset = term->cset;
2294 term->save_utf = term->utf;
2295 term->save_wnext = term->wrapnext;
2296 term->save_csattr = term->cset_attr[term->cset];
2297 term->save_sco_acs = term->sco_acs;
2299 term->curs = term->savecurs;
2300 /* Make sure the window hasn't shrunk since the save */
2301 if (term->curs.x >= term->cols)
2302 term->curs.x = term->cols - 1;
2303 if (term->curs.y >= term->rows)
2304 term->curs.y = term->rows - 1;
2306 term->curr_attr = term->save_attr;
2307 term->cset = term->save_cset;
2308 term->utf = term->save_utf;
2309 term->wrapnext = term->save_wnext;
2311 * wrapnext might reset to False if the x position is no
2312 * longer at the rightmost edge.
2314 if (term->wrapnext && term->curs.x < term->cols-1)
2315 term->wrapnext = FALSE;
2316 term->cset_attr[term->cset] = term->save_csattr;
2317 term->sco_acs = term->save_sco_acs;
2318 set_erase_char(term);
2323 * This function is called before doing _anything_ which affects
2324 * only part of a line of text. It is used to mark the boundary
2325 * between two character positions, and it indicates that some sort
2326 * of effect is going to happen on only one side of that boundary.
2328 * The effect of this function is to check whether a CJK
2329 * double-width character is straddling the boundary, and to remove
2330 * it and replace it with two spaces if so. (Of course, one or
2331 * other of those spaces is then likely to be replaced with
2332 * something else again, as a result of whatever happens next.)
2334 * Also, if the boundary is at the right-hand _edge_ of the screen,
2335 * it implies something deliberate is being done to the rightmost
2336 * column position; hence we must clear LATTR_WRAPPED2.
2338 * The input to the function is the coordinates of the _second_
2339 * character of the pair.
2341 static void check_boundary(Terminal *term, int x, int y)
2345 /* Validate input coordinates, just in case. */
2346 if (x == 0 || x > term->cols)
2349 ldata = scrlineptr(y);
2350 check_line_size(term, ldata);
2351 if (x == term->cols) {
2352 ldata->lattr &= ~LATTR_WRAPPED2;
2354 if (ldata->chars[x].chr == UCSWIDE) {
2355 clear_cc(ldata, x-1);
2357 ldata->chars[x-1].chr = ' ' | CSET_ASCII;
2358 ldata->chars[x] = ldata->chars[x-1];
2364 * Erase a large portion of the screen: the whole screen, or the
2365 * whole line, or parts thereof.
2367 static void erase_lots(Terminal *term,
2368 int line_only, int from_begin, int to_end)
2372 int erasing_lines_from_top = 0;
2375 start.y = term->curs.y;
2377 end.y = term->curs.y + 1;
2379 erase_lattr = FALSE;
2394 if (!from_begin || !to_end)
2395 check_boundary(term, term->curs.x, term->curs.y);
2396 check_selection(term, start, end);
2398 /* Clear screen also forces a full window redraw, just in case. */
2399 if (start.y == 0 && start.x == 0 && end.y == term->rows)
2400 term_invalidate(term);
2402 /* Lines scrolled away shouldn't be brought back on if the terminal
2404 if (start.y == 0 && start.x == 0 && end.x == 0 && erase_lattr)
2405 erasing_lines_from_top = 1;
2407 if (term->erase_to_scrollback && erasing_lines_from_top) {
2408 /* If it's a whole number of lines, starting at the top, and
2409 * we're fully erasing them, erase by scrolling and keep the
2410 * lines in the scrollback. */
2411 int scrolllines = end.y;
2412 if (end.y == term->rows) {
2413 /* Shrink until we find a non-empty row.*/
2414 scrolllines = find_last_nonempty_line(term, term->screen) + 1;
2416 if (scrolllines > 0)
2417 scroll(term, 0, scrolllines - 1, scrolllines, TRUE);
2419 termline *ldata = scrlineptr(start.y);
2420 while (poslt(start, end)) {
2421 check_line_size(term, ldata);
2422 if (start.x == term->cols) {
2424 ldata->lattr &= ~(LATTR_WRAPPED | LATTR_WRAPPED2);
2426 ldata->lattr = LATTR_NORM;
2428 copy_termchar(ldata, start.x, &term->erase_char);
2430 if (incpos(start) && start.y < term->rows) {
2431 ldata = scrlineptr(start.y);
2436 /* After an erase of lines from the top of the screen, we shouldn't
2437 * bring the lines back again if the terminal enlarges (since the user or
2438 * application has explictly thrown them away). */
2439 if (erasing_lines_from_top && !(term->alt_which))
2440 term->tempsblines = 0;
2444 * Insert or delete characters within the current line. n is +ve if
2445 * insertion is desired, and -ve for deletion.
2447 static void insch(Terminal *term, int n)
2449 int dir = (n < 0 ? -1 : +1);
2454 n = (n < 0 ? -n : n);
2455 if (n > term->cols - term->curs.x)
2456 n = term->cols - term->curs.x;
2457 m = term->cols - term->curs.x - n;
2460 * We must de-highlight the selection if it overlaps any part of
2461 * the region affected by this operation, i.e. the region from the
2462 * current cursor position to end-of-line, _unless_ the entirety
2463 * of the selection is going to be moved to the left or right by
2464 * this operation but otherwise unchanged, in which case we can
2465 * simply move the highlight with the text.
2467 eol.y = term->curs.y;
2469 if (poslt(term->curs, term->selend) && poslt(term->selstart, eol)) {
2470 pos okstart = term->curs;
2473 /* Insertion: n characters at EOL will be splatted. */
2476 /* Deletion: n characters at cursor position will be splatted. */
2479 if (posle(okstart, term->selstart) && posle(term->selend, okend)) {
2480 /* Selection is contained entirely in the interval
2481 * [okstart,okend), so we need only adjust the selection
2483 term->selstart.x += dir * n;
2484 term->selend.x += dir * n;
2485 assert(term->selstart.x >= term->curs.x);
2486 assert(term->selstart.x < term->cols);
2487 assert(term->selend.x > term->curs.x);
2488 assert(term->selend.x <= term->cols);
2490 /* Selection is not wholly contained in that interval, so
2491 * we must unhighlight it. */
2496 check_boundary(term, term->curs.x, term->curs.y);
2498 check_boundary(term, term->curs.x + n, term->curs.y);
2499 ldata = scrlineptr(term->curs.y);
2501 for (j = 0; j < m; j++)
2502 move_termchar(ldata,
2503 ldata->chars + term->curs.x + j,
2504 ldata->chars + term->curs.x + j + n);
2506 copy_termchar(ldata, term->curs.x + m++, &term->erase_char);
2509 move_termchar(ldata,
2510 ldata->chars + term->curs.x + j + n,
2511 ldata->chars + term->curs.x + j);
2513 copy_termchar(ldata, term->curs.x + n, &term->erase_char);
2518 * Toggle terminal mode `mode' to state `state'. (`query' indicates
2519 * whether the mode is a DEC private one or a normal one.)
2521 static void toggle_mode(Terminal *term, int mode, int query, int state)
2525 case 1: /* DECCKM: application cursor keys */
2526 term->app_cursor_keys = state;
2528 case 2: /* DECANM: VT52 mode */
2529 term->vt52_mode = !state;
2530 if (term->vt52_mode) {
2531 term->blink_is_real = FALSE;
2532 term->vt52_bold = FALSE;
2534 term->blink_is_real = term->blinktext;
2536 term_schedule_tblink(term);
2538 case 3: /* DECCOLM: 80/132 columns */
2540 if (!term->no_remote_resize)
2541 request_resize(term->frontend, state ? 132 : 80, term->rows);
2542 term->reset_132 = state;
2543 term->alt_t = term->marg_t = 0;
2544 term->alt_b = term->marg_b = term->rows - 1;
2545 move(term, 0, 0, 0);
2546 erase_lots(term, FALSE, TRUE, TRUE);
2548 case 5: /* DECSCNM: reverse video */
2550 * Toggle reverse video. If we receive an OFF within the
2551 * visual bell timeout period after an ON, we trigger an
2552 * effective visual bell, so that ESC[?5hESC[?5l will
2553 * always be an actually _visible_ visual bell.
2555 if (term->rvideo && !state) {
2556 /* This is an OFF, so set up a vbell */
2557 term_schedule_vbell(term, TRUE, term->rvbell_startpoint);
2558 } else if (!term->rvideo && state) {
2559 /* This is an ON, so we notice the time and save it. */
2560 term->rvbell_startpoint = GETTICKCOUNT();
2562 term->rvideo = state;
2563 seen_disp_event(term);
2565 case 6: /* DECOM: DEC origin mode */
2566 term->dec_om = state;
2568 case 7: /* DECAWM: auto wrap */
2571 case 8: /* DECARM: auto key repeat */
2572 term->repeat_off = !state;
2574 case 10: /* DECEDM: set local edit mode */
2575 term->term_editing = state;
2576 if (term->ldisc) /* cause ldisc to notice changes */
2577 ldisc_send(term->ldisc, NULL, 0, 0);
2579 case 25: /* DECTCEM: enable/disable cursor */
2580 compatibility2(OTHER, VT220);
2581 term->cursor_on = state;
2582 seen_disp_event(term);
2584 case 47: /* alternate screen */
2585 compatibility(OTHER);
2587 swap_screen(term, term->no_alt_screen ? 0 : state, FALSE, FALSE);
2588 if (term->scroll_on_disp)
2591 case 1000: /* xterm mouse 1 (normal) */
2592 term->xterm_mouse = state ? 1 : 0;
2593 set_raw_mouse_mode(term->frontend, state);
2595 case 1002: /* xterm mouse 2 (inc. button drags) */
2596 term->xterm_mouse = state ? 2 : 0;
2597 set_raw_mouse_mode(term->frontend, state);
2599 case 1006: /* xterm extended mouse */
2600 term->xterm_extended_mouse = state ? 1 : 0;
2602 case 1015: /* urxvt extended mouse */
2603 term->urxvt_extended_mouse = state ? 1 : 0;
2605 case 1047: /* alternate screen */
2606 compatibility(OTHER);
2608 swap_screen(term, term->no_alt_screen ? 0 : state, TRUE, TRUE);
2609 if (term->scroll_on_disp)
2612 case 1048: /* save/restore cursor */
2613 if (!term->no_alt_screen)
2614 save_cursor(term, state);
2615 if (!state) seen_disp_event(term);
2617 case 1049: /* cursor & alternate screen */
2618 if (state && !term->no_alt_screen)
2619 save_cursor(term, state);
2620 if (!state) seen_disp_event(term);
2621 compatibility(OTHER);
2623 swap_screen(term, term->no_alt_screen ? 0 : state, TRUE, FALSE);
2624 if (!state && !term->no_alt_screen)
2625 save_cursor(term, state);
2626 if (term->scroll_on_disp)
2629 case 2004: /* xterm bracketed paste */
2630 term->bracketed_paste = state ? TRUE : FALSE;
2634 case 4: /* IRM: set insert mode */
2635 compatibility(VT102);
2636 term->insert = state;
2638 case 12: /* SRM: set echo mode */
2639 term->term_echoing = !state;
2640 if (term->ldisc) /* cause ldisc to notice changes */
2641 ldisc_send(term->ldisc, NULL, 0, 0);
2643 case 20: /* LNM: Return sends ... */
2644 term->cr_lf_return = state;
2646 case 34: /* WYULCURM: Make cursor BIG */
2647 compatibility2(OTHER, VT220);
2648 term->big_cursor = !state;
2653 * Process an OSC sequence: set window title or icon name.
2655 static void do_osc(Terminal *term)
2658 while (term->osc_strlen--)
2659 term->wordness[(unsigned char)
2660 term->osc_string[term->osc_strlen]] = term->esc_args[0];
2662 term->osc_string[term->osc_strlen] = '\0';
2663 switch (term->esc_args[0]) {
2666 if (!term->no_remote_wintitle)
2667 set_icon(term->frontend, term->osc_string);
2668 if (term->esc_args[0] == 1)
2670 /* fall through: parameter 0 means set both */
2673 if (!term->no_remote_wintitle)
2674 set_title(term->frontend, term->osc_string);
2681 * ANSI printing routines.
2683 static void term_print_setup(Terminal *term, char *printer)
2685 bufchain_clear(&term->printer_buf);
2686 term->print_job = printer_start_job(printer);
2688 static void term_print_flush(Terminal *term)
2693 while ((size = bufchain_size(&term->printer_buf)) > 5) {
2694 bufchain_prefix(&term->printer_buf, &data, &len);
2697 printer_job_data(term->print_job, data, len);
2698 bufchain_consume(&term->printer_buf, len);
2701 static void term_print_finish(Terminal *term)
2707 if (!term->printing && !term->only_printing)
2708 return; /* we need do nothing */
2710 term_print_flush(term);
2711 while ((size = bufchain_size(&term->printer_buf)) > 0) {
2712 bufchain_prefix(&term->printer_buf, &data, &len);
2714 if (c == '\033' || c == '\233') {
2715 bufchain_consume(&term->printer_buf, size);
2718 printer_job_data(term->print_job, &c, 1);
2719 bufchain_consume(&term->printer_buf, 1);
2722 printer_finish_job(term->print_job);
2723 term->print_job = NULL;
2724 term->printing = term->only_printing = FALSE;
2728 * Remove everything currently in `inbuf' and stick it up on the
2729 * in-memory display. There's a big state machine in here to
2730 * process escape sequences...
2732 static void term_out(Terminal *term)
2736 unsigned char localbuf[256], *chars;
2741 chars = NULL; /* placate compiler warnings */
2742 while (nchars > 0 || unget != -1 || bufchain_size(&term->inbuf) > 0) {
2746 bufchain_prefix(&term->inbuf, &ret, &nchars);
2747 if (nchars > sizeof(localbuf))
2748 nchars = sizeof(localbuf);
2749 memcpy(localbuf, ret, nchars);
2750 bufchain_consume(&term->inbuf, nchars);
2752 assert(chars != NULL);
2758 * Optionally log the session traffic to a file. Useful for
2759 * debugging and possibly also useful for actual logging.
2761 if (term->logtype == LGTYP_DEBUG && term->logctx)
2762 logtraffic(term->logctx, (unsigned char) c, LGTYP_DEBUG);
2768 /* Note only VT220+ are 8-bit VT102 is seven bit, it shouldn't even
2769 * be able to display 8-bit characters, but I'll let that go 'cause
2774 * If we're printing, add the character to the printer
2777 if (term->printing) {
2778 bufchain_add(&term->printer_buf, &c, 1);
2781 * If we're in print-only mode, we use a much simpler
2782 * state machine designed only to recognise the ESC[4i
2783 * termination sequence.
2785 if (term->only_printing) {
2787 term->print_state = 1;
2788 else if (c == (unsigned char)'\233')
2789 term->print_state = 2;
2790 else if (c == '[' && term->print_state == 1)
2791 term->print_state = 2;
2792 else if (c == '4' && term->print_state == 2)
2793 term->print_state = 3;
2794 else if (c == 'i' && term->print_state == 3)
2795 term->print_state = 4;
2797 term->print_state = 0;
2798 if (term->print_state == 4) {
2799 term_print_finish(term);
2805 /* First see about all those translations. */
2806 if (term->termstate == TOPLEVEL) {
2808 switch (term->utf_state) {
2811 /* UTF-8 must be stateless so we ignore iso2022. */
2812 if (term->ucsdata->unitab_ctrl[c] != 0xFF)
2813 c = term->ucsdata->unitab_ctrl[c];
2814 else c = ((unsigned char)c) | CSET_ASCII;
2816 } else if ((c & 0xe0) == 0xc0) {
2817 term->utf_size = term->utf_state = 1;
2818 term->utf_char = (c & 0x1f);
2819 } else if ((c & 0xf0) == 0xe0) {
2820 term->utf_size = term->utf_state = 2;
2821 term->utf_char = (c & 0x0f);
2822 } else if ((c & 0xf8) == 0xf0) {
2823 term->utf_size = term->utf_state = 3;
2824 term->utf_char = (c & 0x07);
2825 } else if ((c & 0xfc) == 0xf8) {
2826 term->utf_size = term->utf_state = 4;
2827 term->utf_char = (c & 0x03);
2828 } else if ((c & 0xfe) == 0xfc) {
2829 term->utf_size = term->utf_state = 5;
2830 term->utf_char = (c & 0x01);
2841 if ((c & 0xC0) != 0x80) {
2844 term->utf_state = 0;
2847 term->utf_char = (term->utf_char << 6) | (c & 0x3f);
2848 if (--term->utf_state)
2853 /* Is somebody trying to be evil! */
2855 (c < 0x800 && term->utf_size >= 2) ||
2856 (c < 0x10000 && term->utf_size >= 3) ||
2857 (c < 0x200000 && term->utf_size >= 4) ||
2858 (c < 0x4000000 && term->utf_size >= 5))
2861 /* Unicode line separator and paragraph separator are CR-LF */
2862 if (c == 0x2028 || c == 0x2029)
2865 /* High controls are probably a Baaad idea too. */
2869 /* The UTF-16 surrogates are not nice either. */
2870 /* The standard give the option of decoding these:
2871 * I don't want to! */
2872 if (c >= 0xD800 && c < 0xE000)
2875 /* ISO 10646 characters now limited to UTF-16 range. */
2879 /* This is currently a TagPhobic application.. */
2880 if (c >= 0xE0000 && c <= 0xE007F)
2883 /* U+FEFF is best seen as a null. */
2886 /* But U+FFFE is an error. */
2887 if (c == 0xFFFE || c == 0xFFFF)
2892 /* Are we in the nasty ACS mode? Note: no sco in utf mode. */
2893 else if(term->sco_acs &&
2894 (c!='\033' && c!='\012' && c!='\015' && c!='\b'))
2896 if (term->sco_acs == 2) c |= 0x80;
2899 switch (term->cset_attr[term->cset]) {
2901 * Linedraw characters are different from 'ESC ( B'
2902 * only for a small range. For ones outside that
2903 * range, make sure we use the same font as well as
2904 * the same encoding.
2907 if (term->ucsdata->unitab_ctrl[c] != 0xFF)
2908 c = term->ucsdata->unitab_ctrl[c];
2910 c = ((unsigned char) c) | CSET_LINEDRW;
2914 /* If UK-ASCII, make the '#' a LineDraw Pound */
2916 c = '}' | CSET_LINEDRW;
2919 /*FALLTHROUGH*/ case CSET_ASCII:
2920 if (term->ucsdata->unitab_ctrl[c] != 0xFF)
2921 c = term->ucsdata->unitab_ctrl[c];
2923 c = ((unsigned char) c) | CSET_ASCII;
2926 if (c>=' ') c = ((unsigned char)c) | CSET_SCOACS;
2933 * How about C1 controls?
2934 * Explicitly ignore SCI (0x9a), which we don't translate to DECID.
2936 if ((c & -32) == 0x80 && term->termstate < DO_CTRLS &&
2937 !term->vt52_mode && has_compat(VT220)) {
2941 term->termstate = SEEN_ESC;
2942 term->esc_query = FALSE;
2943 c = '@' + (c & 0x1F);
2947 /* Or the GL control. */
2948 if (c == '\177' && term->termstate < DO_CTRLS && has_compat(OTHER)) {
2949 if (term->curs.x && !term->wrapnext)
2951 term->wrapnext = FALSE;
2952 /* destructive backspace might be disabled */
2953 if (!term->no_dbackspace) {
2954 check_boundary(term, term->curs.x, term->curs.y);
2955 check_boundary(term, term->curs.x+1, term->curs.y);
2956 copy_termchar(scrlineptr(term->curs.y),
2957 term->curs.x, &term->erase_char);
2960 /* Or normal C0 controls. */
2961 if ((c & ~0x1F) == 0 && term->termstate < DO_CTRLS) {
2963 case '\005': /* ENQ: terminal type query */
2965 * Strictly speaking this is VT100 but a VT100 defaults to
2966 * no response. Other terminals respond at their option.
2968 * Don't put a CR in the default string as this tends to
2969 * upset some weird software.
2971 compatibility(ANSIMIN);
2973 lpage_send(term->ldisc, DEFAULT_CODEPAGE,
2974 term->answerback, term->answerbacklen, 0);
2977 case '\007': /* BEL: Bell */
2979 struct beeptime *newbeep;
2980 unsigned long ticks;
2982 ticks = GETTICKCOUNT();
2984 if (!term->beep_overloaded) {
2985 newbeep = snew(struct beeptime);
2986 newbeep->ticks = ticks;
2987 newbeep->next = NULL;
2988 if (!term->beephead)
2989 term->beephead = newbeep;
2991 term->beeptail->next = newbeep;
2992 term->beeptail = newbeep;
2997 * Throw out any beeps that happened more than
3000 while (term->beephead &&
3001 term->beephead->ticks < ticks - term->bellovl_t) {
3002 struct beeptime *tmp = term->beephead;
3003 term->beephead = tmp->next;
3005 if (!term->beephead)
3006 term->beeptail = NULL;
3010 if (term->bellovl && term->beep_overloaded &&
3011 ticks - term->lastbeep >= (unsigned)term->bellovl_s) {
3013 * If we're currently overloaded and the
3014 * last beep was more than s seconds ago,
3015 * leave overload mode.
3017 term->beep_overloaded = FALSE;
3018 } else if (term->bellovl && !term->beep_overloaded &&
3019 term->nbeeps >= term->bellovl_n) {
3021 * Now, if we have n or more beeps
3022 * remaining in the queue, go into overload
3025 term->beep_overloaded = TRUE;
3027 term->lastbeep = ticks;
3030 * Perform an actual beep if we're not overloaded.
3032 if (!term->bellovl || !term->beep_overloaded) {
3033 do_beep(term->frontend, term->beep);
3035 if (term->beep == BELL_VISUAL) {
3036 term_schedule_vbell(term, FALSE, 0);
3039 seen_disp_event(term);
3042 case '\b': /* BS: Back space */
3043 if (term->curs.x == 0 &&
3044 (term->curs.y == 0 || term->wrap == 0))
3046 else if (term->curs.x == 0 && term->curs.y > 0)
3047 term->curs.x = term->cols - 1, term->curs.y--;
3048 else if (term->wrapnext)
3049 term->wrapnext = FALSE;
3052 seen_disp_event(term);
3054 case '\016': /* LS1: Locking-shift one */
3055 compatibility(VT100);
3058 case '\017': /* LS0: Locking-shift zero */
3059 compatibility(VT100);
3062 case '\033': /* ESC: Escape */
3063 if (term->vt52_mode)
3064 term->termstate = VT52_ESC;
3066 compatibility(ANSIMIN);
3067 term->termstate = SEEN_ESC;
3068 term->esc_query = FALSE;
3071 case '\015': /* CR: Carriage return */
3073 term->wrapnext = FALSE;
3074 seen_disp_event(term);
3076 if (term->crhaslf) {
3077 if (term->curs.y == term->marg_b)
3078 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3079 else if (term->curs.y < term->rows - 1)
3083 logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
3085 case '\014': /* FF: Form feed */
3086 if (has_compat(SCOANSI)) {
3087 move(term, 0, 0, 0);
3088 erase_lots(term, FALSE, FALSE, TRUE);
3089 if (term->scroll_on_disp)
3091 term->wrapnext = FALSE;
3092 seen_disp_event(term);
3095 case '\013': /* VT: Line tabulation */
3096 compatibility(VT100);
3097 case '\012': /* LF: Line feed */
3098 if (term->curs.y == term->marg_b)
3099 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3100 else if (term->curs.y < term->rows - 1)
3104 term->wrapnext = FALSE;
3105 seen_disp_event(term);
3107 logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
3109 case '\t': /* HT: Character tabulation */
3111 pos old_curs = term->curs;
3112 termline *ldata = scrlineptr(term->curs.y);
3116 } while (term->curs.x < term->cols - 1 &&
3117 !term->tabs[term->curs.x]);
3119 if ((ldata->lattr & LATTR_MODE) != LATTR_NORM) {
3120 if (term->curs.x >= term->cols / 2)
3121 term->curs.x = term->cols / 2 - 1;
3123 if (term->curs.x >= term->cols)
3124 term->curs.x = term->cols - 1;
3127 check_selection(term, old_curs, term->curs);
3129 seen_disp_event(term);
3133 switch (term->termstate) {
3135 /* Only graphic characters get this far;
3136 * ctrls are stripped above */
3138 termline *cline = scrlineptr(term->curs.y);
3143 width = (term->cjk_ambig_wide ?
3144 mk_wcwidth_cjk((unsigned int) c) :
3145 mk_wcwidth((unsigned int) c));
3147 if (term->wrapnext && term->wrap && width > 0) {
3148 cline->lattr |= LATTR_WRAPPED;
3149 if (term->curs.y == term->marg_b)
3150 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3151 else if (term->curs.y < term->rows - 1)
3154 term->wrapnext = FALSE;
3155 cline = scrlineptr(term->curs.y);
3157 if (term->insert && width > 0)
3159 if (term->selstate != NO_SELECTION) {
3160 pos cursplus = term->curs;
3162 check_selection(term, term->curs, cursplus);
3164 if (((c & CSET_MASK) == CSET_ASCII ||
3165 (c & CSET_MASK) == 0) &&
3167 logtraffic(term->logctx, (unsigned char) c,
3173 * If we're about to display a double-width
3174 * character starting in the rightmost
3175 * column, then we do something special
3176 * instead. We must print a space in the
3177 * last column of the screen, then wrap;
3178 * and we also set LATTR_WRAPPED2 which
3179 * instructs subsequent cut-and-pasting not
3180 * only to splice this line to the one
3181 * after it, but to ignore the space in the
3182 * last character position as well.
3183 * (Because what was actually output to the
3184 * terminal was presumably just a sequence
3185 * of CJK characters, and we don't want a
3186 * space to be pasted in the middle of
3187 * those just because they had the
3188 * misfortune to start in the wrong parity
3189 * column. xterm concurs.)
3191 check_boundary(term, term->curs.x, term->curs.y);
3192 check_boundary(term, term->curs.x+2, term->curs.y);
3193 if (term->curs.x == term->cols-1) {
3194 copy_termchar(cline, term->curs.x,
3196 cline->lattr |= LATTR_WRAPPED | LATTR_WRAPPED2;
3197 if (term->curs.y == term->marg_b)
3198 scroll(term, term->marg_t, term->marg_b,
3200 else if (term->curs.y < term->rows - 1)
3203 cline = scrlineptr(term->curs.y);
3204 /* Now we must check_boundary again, of course. */
3205 check_boundary(term, term->curs.x, term->curs.y);
3206 check_boundary(term, term->curs.x+2, term->curs.y);
3210 clear_cc(cline, term->curs.x);
3211 cline->chars[term->curs.x].chr = c;
3212 cline->chars[term->curs.x].attr = term->curr_attr;
3217 clear_cc(cline, term->curs.x);
3218 cline->chars[term->curs.x].chr = UCSWIDE;
3219 cline->chars[term->curs.x].attr = term->curr_attr;
3223 check_boundary(term, term->curs.x, term->curs.y);
3224 check_boundary(term, term->curs.x+1, term->curs.y);
3227 clear_cc(cline, term->curs.x);
3228 cline->chars[term->curs.x].chr = c;
3229 cline->chars[term->curs.x].attr = term->curr_attr;
3233 if (term->curs.x > 0) {
3234 int x = term->curs.x - 1;
3236 /* If we're in wrapnext state, the character
3237 * to combine with is _here_, not to our left. */
3242 * If the previous character is
3243 * UCSWIDE, back up another one.
3245 if (cline->chars[x].chr == UCSWIDE) {
3250 add_cc(cline, x, c);
3251 seen_disp_event(term);
3258 if (term->curs.x == term->cols) {
3260 term->wrapnext = TRUE;
3261 if (term->wrap && term->vt52_mode) {
3262 cline->lattr |= LATTR_WRAPPED;
3263 if (term->curs.y == term->marg_b)
3264 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3265 else if (term->curs.y < term->rows - 1)
3268 term->wrapnext = FALSE;
3271 seen_disp_event(term);
3277 * This state is virtually identical to SEEN_ESC, with the
3278 * exception that we have an OSC sequence in the pipeline,
3279 * and _if_ we see a backslash, we process it.
3283 term->termstate = TOPLEVEL;
3286 /* else fall through */
3288 if (c >= ' ' && c <= '/') {
3289 if (term->esc_query)
3290 term->esc_query = -1;
3292 term->esc_query = c;
3295 term->termstate = TOPLEVEL;
3296 switch (ANSI(c, term->esc_query)) {
3297 case '[': /* enter CSI mode */
3298 term->termstate = SEEN_CSI;
3299 term->esc_nargs = 1;
3300 term->esc_args[0] = ARG_DEFAULT;
3301 term->esc_query = FALSE;
3303 case ']': /* OSC: xterm escape sequences */
3304 /* Compatibility is nasty here, xterm, linux, decterm yuk! */
3305 compatibility(OTHER);
3306 term->termstate = SEEN_OSC;
3307 term->esc_args[0] = 0;
3309 case '7': /* DECSC: save cursor */
3310 compatibility(VT100);
3311 save_cursor(term, TRUE);
3313 case '8': /* DECRC: restore cursor */
3314 compatibility(VT100);
3315 save_cursor(term, FALSE);
3316 seen_disp_event(term);
3318 case '=': /* DECKPAM: Keypad application mode */
3319 compatibility(VT100);
3320 term->app_keypad_keys = TRUE;
3322 case '>': /* DECKPNM: Keypad numeric mode */
3323 compatibility(VT100);
3324 term->app_keypad_keys = FALSE;
3326 case 'D': /* IND: exactly equivalent to LF */
3327 compatibility(VT100);
3328 if (term->curs.y == term->marg_b)
3329 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3330 else if (term->curs.y < term->rows - 1)
3332 term->wrapnext = FALSE;
3333 seen_disp_event(term);
3335 case 'E': /* NEL: exactly equivalent to CR-LF */
3336 compatibility(VT100);
3338 if (term->curs.y == term->marg_b)
3339 scroll(term, term->marg_t, term->marg_b, 1, TRUE);
3340 else if (term->curs.y < term->rows - 1)
3342 term->wrapnext = FALSE;
3343 seen_disp_event(term);
3345 case 'M': /* RI: reverse index - backwards LF */
3346 compatibility(VT100);
3347 if (term->curs.y == term->marg_t)
3348 scroll(term, term->marg_t, term->marg_b, -1, TRUE);
3349 else if (term->curs.y > 0)
3351 term->wrapnext = FALSE;
3352 seen_disp_event(term);
3354 case 'Z': /* DECID: terminal type query */
3355 compatibility(VT100);
3357 ldisc_send(term->ldisc, term->id_string,
3358 strlen(term->id_string), 0);
3360 case 'c': /* RIS: restore power-on settings */
3361 compatibility(VT100);
3362 power_on(term, TRUE);
3363 if (term->ldisc) /* cause ldisc to notice changes */
3364 ldisc_send(term->ldisc, NULL, 0, 0);
3365 if (term->reset_132) {
3366 if (!term->no_remote_resize)
3367 request_resize(term->frontend, 80, term->rows);
3368 term->reset_132 = 0;
3370 if (term->scroll_on_disp)
3372 seen_disp_event(term);
3374 case 'H': /* HTS: set a tab */
3375 compatibility(VT100);
3376 term->tabs[term->curs.x] = TRUE;
3379 case ANSI('8', '#'): /* DECALN: fills screen with Es :-) */
3380 compatibility(VT100);
3386 for (i = 0; i < term->rows; i++) {
3387 ldata = scrlineptr(i);
3388 check_line_size(term, ldata);
3389 for (j = 0; j < term->cols; j++) {
3390 copy_termchar(ldata, j,
3391 &term->basic_erase_char);
3392 ldata->chars[j].chr = 'E';
3394 ldata->lattr = LATTR_NORM;
3396 if (term->scroll_on_disp)
3398 seen_disp_event(term);
3399 scrtop.x = scrtop.y = 0;
3401 scrbot.y = term->rows;
3402 check_selection(term, scrtop, scrbot);
3406 case ANSI('3', '#'):
3407 case ANSI('4', '#'):
3408 case ANSI('5', '#'):
3409 case ANSI('6', '#'):
3410 compatibility(VT100);
3415 switch (ANSI(c, term->esc_query)) {
3416 case ANSI('3', '#'): /* DECDHL: 2*height, top */
3419 case ANSI('4', '#'): /* DECDHL: 2*height, bottom */
3422 case ANSI('5', '#'): /* DECSWL: normal */
3423 nlattr = LATTR_NORM;
3425 default: /* case ANSI('6', '#'): DECDWL: 2*width */
3426 nlattr = LATTR_WIDE;
3429 ldata = scrlineptr(term->curs.y);
3430 check_line_size(term, ldata);
3431 ldata->lattr = nlattr;
3434 /* GZD4: G0 designate 94-set */
3435 case ANSI('A', '('):
3436 compatibility(VT100);
3437 if (!term->no_remote_charset)
3438 term->cset_attr[0] = CSET_GBCHR;
3440 case ANSI('B', '('):
3441 compatibility(VT100);
3442 if (!term->no_remote_charset)
3443 term->cset_attr[0] = CSET_ASCII;
3445 case ANSI('0', '('):
3446 compatibility(VT100);
3447 if (!term->no_remote_charset)
3448 term->cset_attr[0] = CSET_LINEDRW;
3450 case ANSI('U', '('):
3451 compatibility(OTHER);
3452 if (!term->no_remote_charset)
3453 term->cset_attr[0] = CSET_SCOACS;
3455 /* G1D4: G1-designate 94-set */
3456 case ANSI('A', ')'):
3457 compatibility(VT100);
3458 if (!term->no_remote_charset)
3459 term->cset_attr[1] = CSET_GBCHR;
3461 case ANSI('B', ')'):
3462 compatibility(VT100);
3463 if (!term->no_remote_charset)
3464 term->cset_attr[1] = CSET_ASCII;
3466 case ANSI('0', ')'):
3467 compatibility(VT100);
3468 if (!term->no_remote_charset)
3469 term->cset_attr[1] = CSET_LINEDRW;
3471 case ANSI('U', ')'):
3472 compatibility(OTHER);
3473 if (!term->no_remote_charset)
3474 term->cset_attr[1] = CSET_SCOACS;
3476 /* DOCS: Designate other coding system */
3477 case ANSI('8', '%'): /* Old Linux code */
3478 case ANSI('G', '%'):
3479 compatibility(OTHER);
3480 if (!term->no_remote_charset)
3483 case ANSI('@', '%'):
3484 compatibility(OTHER);
3485 if (!term->no_remote_charset)
3491 term->termstate = TOPLEVEL; /* default */
3493 if (term->esc_nargs <= ARGS_MAX) {
3494 if (term->esc_args[term->esc_nargs - 1] == ARG_DEFAULT)
3495 term->esc_args[term->esc_nargs - 1] = 0;
3496 term->esc_args[term->esc_nargs - 1] =
3497 10 * term->esc_args[term->esc_nargs - 1] + c - '0';
3499 term->termstate = SEEN_CSI;
3500 } else if (c == ';') {
3501 if (term->esc_nargs < ARGS_MAX)
3502 term->esc_args[term->esc_nargs++] = ARG_DEFAULT;
3503 term->termstate = SEEN_CSI;
3504 } else if (c < '@') {
3505 if (term->esc_query)
3506 term->esc_query = -1;
3508 term->esc_query = TRUE;
3510 term->esc_query = c;
3511 term->termstate = SEEN_CSI;
3513 switch (ANSI(c, term->esc_query)) {
3514 case 'A': /* CUU: move up N lines */
3515 move(term, term->curs.x,
3516 term->curs.y - def(term->esc_args[0], 1), 1);
3517 seen_disp_event(term);
3519 case 'e': /* VPR: move down N lines */
3520 compatibility(ANSI);
3522 case 'B': /* CUD: Cursor down */
3523 move(term, term->curs.x,
3524 term->curs.y + def(term->esc_args[0], 1), 1);
3525 seen_disp_event(term);
3527 case ANSI('c', '>'): /* DA: report xterm version */
3528 compatibility(OTHER);
3529 /* this reports xterm version 136 so that VIM can
3530 use the drag messages from the mouse reporting */
3532 ldisc_send(term->ldisc, "\033[>0;136;0c", 11, 0);
3534 case 'a': /* HPR: move right N cols */
3535 compatibility(ANSI);
3537 case 'C': /* CUF: Cursor right */
3538 move(term, term->curs.x + def(term->esc_args[0], 1),
3540 seen_disp_event(term);
3542 case 'D': /* CUB: move left N cols */
3543 move(term, term->curs.x - def(term->esc_args[0], 1),
3545 seen_disp_event(term);
3547 case 'E': /* CNL: move down N lines and CR */
3548 compatibility(ANSI);
3550 term->curs.y + def(term->esc_args[0], 1), 1);
3551 seen_disp_event(term);
3553 case 'F': /* CPL: move up N lines and CR */
3554 compatibility(ANSI);
3556 term->curs.y - def(term->esc_args[0], 1), 1);
3557 seen_disp_event(term);
3560 case '`': /* HPA: set horizontal posn */
3561 compatibility(ANSI);
3562 move(term, def(term->esc_args[0], 1) - 1,
3564 seen_disp_event(term);
3566 case 'd': /* VPA: set vertical posn */
3567 compatibility(ANSI);
3568 move(term, term->curs.x,
3569 ((term->dec_om ? term->marg_t : 0) +
3570 def(term->esc_args[0], 1) - 1),
3571 (term->dec_om ? 2 : 0));
3572 seen_disp_event(term);
3575 case 'f': /* HVP: set horz and vert posns at once */
3576 if (term->esc_nargs < 2)
3577 term->esc_args[1] = ARG_DEFAULT;
3578 move(term, def(term->esc_args[1], 1) - 1,
3579 ((term->dec_om ? term->marg_t : 0) +
3580 def(term->esc_args[0], 1) - 1),
3581 (term->dec_om ? 2 : 0));
3582 seen_disp_event(term);
3584 case 'J': /* ED: erase screen or parts of it */
3586 unsigned int i = def(term->esc_args[0], 0);
3588 /* Erase Saved Lines (xterm)
3589 * This follows Thomas Dickey's xterm. */
3595 erase_lots(term, FALSE, !!(i & 2), !!(i & 1));
3598 if (term->scroll_on_disp)
3600 seen_disp_event(term);
3602 case 'K': /* EL: erase line or parts of it */
3604 unsigned int i = def(term->esc_args[0], 0) + 1;
3607 erase_lots(term, TRUE, !!(i & 2), !!(i & 1));
3609 seen_disp_event(term);
3611 case 'L': /* IL: insert lines */
3612 compatibility(VT102);
3613 if (term->curs.y <= term->marg_b)
3614 scroll(term, term->curs.y, term->marg_b,
3615 -def(term->esc_args[0], 1), FALSE);
3616 seen_disp_event(term);
3618 case 'M': /* DL: delete lines */
3619 compatibility(VT102);
3620 if (term->curs.y <= term->marg_b)
3621 scroll(term, term->curs.y, term->marg_b,
3622 def(term->esc_args[0], 1),
3624 seen_disp_event(term);
3626 case '@': /* ICH: insert chars */
3627 /* XXX VTTEST says this is vt220, vt510 manual says vt102 */
3628 compatibility(VT102);
3629 insch(term, def(term->esc_args[0], 1));
3630 seen_disp_event(term);
3632 case 'P': /* DCH: delete chars */
3633 compatibility(VT102);
3634 insch(term, -def(term->esc_args[0], 1));
3635 seen_disp_event(term);
3637 case 'c': /* DA: terminal type query */
3638 compatibility(VT100);
3639 /* This is the response for a VT102 */
3641 ldisc_send(term->ldisc, term->id_string,
3642 strlen(term->id_string), 0);
3644 case 'n': /* DSR: cursor position query */
3646 if (term->esc_args[0] == 6) {
3648 sprintf(buf, "\033[%d;%dR", term->curs.y + 1,
3650 ldisc_send(term->ldisc, buf, strlen(buf), 0);
3651 } else if (term->esc_args[0] == 5) {
3652 ldisc_send(term->ldisc, "\033[0n", 4, 0);
3656 case 'h': /* SM: toggle modes to high */
3658 compatibility(VT100);
3661 for (i = 0; i < term->esc_nargs; i++)
3662 toggle_mode(term, term->esc_args[i],
3663 term->esc_query, TRUE);
3666 case 'i': /* MC: Media copy */
3668 compatibility(VT100);
3671 if (term->esc_nargs != 1) break;
3672 if (term->esc_args[0] == 5 &&
3673 (printer = conf_get_str(term->conf,
3674 CONF_printer))[0]) {
3675 term->printing = TRUE;
3676 term->only_printing = !term->esc_query;
3677 term->print_state = 0;
3678 term_print_setup(term, printer);
3679 } else if (term->esc_args[0] == 4 &&
3681 term_print_finish(term);
3685 case 'l': /* RM: toggle modes to low */
3687 compatibility(VT100);
3690 for (i = 0; i < term->esc_nargs; i++)
3691 toggle_mode(term, term->esc_args[i],
3692 term->esc_query, FALSE);
3695 case 'g': /* TBC: clear tabs */
3696 compatibility(VT100);
3697 if (term->esc_nargs == 1) {
3698 if (term->esc_args[0] == 0) {
3699 term->tabs[term->curs.x] = FALSE;
3700 } else if (term->esc_args[0] == 3) {
3702 for (i = 0; i < term->cols; i++)
3703 term->tabs[i] = FALSE;
3707 case 'r': /* DECSTBM: set scroll margins */
3708 compatibility(VT100);
3709 if (term->esc_nargs <= 2) {
3711 top = def(term->esc_args[0], 1) - 1;
3712 bot = (term->esc_nargs <= 1
3713 || term->esc_args[1] == 0 ?
3715 def(term->esc_args[1], term->rows)) - 1;
3716 if (bot >= term->rows)
3717 bot = term->rows - 1;
3718 /* VTTEST Bug 9 - if region is less than 2 lines
3719 * don't change region.
3721 if (bot - top > 0) {
3726 * I used to think the cursor should be
3727 * placed at the top of the newly marginned
3728 * area. Apparently not: VMS TPU falls over
3731 * Well actually it should for
3734 term->curs.y = (term->dec_om ?
3736 seen_disp_event(term);
3740 case 'm': /* SGR: set graphics rendition */
3743 * A VT100 without the AVO only had one
3744 * attribute, either underline or
3745 * reverse video depending on the
3746 * cursor type, this was selected by
3750 * This is sometimes DIM, eg on the
3753 * This is sometimes INVIS various ANSI.
3755 * This like 22 disables BOLD, DIM and INVIS
3757 * The ANSI colours appear on any
3758 * terminal that has colour (obviously)
3759 * but the interaction between sgr0 and
3760 * the colours varies but is usually
3761 * related to the background colour
3762 * erase item. The interaction between
3763 * colour attributes and the mono ones
3764 * is also very implementation
3767 * The 39 and 49 attributes are likely
3768 * to be unimplemented.
3771 for (i = 0; i < term->esc_nargs; i++) {
3772 switch (def(term->esc_args[i], 0)) {
3773 case 0: /* restore defaults */
3774 term->curr_attr = term->default_attr;
3776 case 1: /* enable bold */
3777 compatibility(VT100AVO);
3778 term->curr_attr |= ATTR_BOLD;
3780 case 21: /* (enable double underline) */
3781 compatibility(OTHER);
3782 case 4: /* enable underline */
3783 compatibility(VT100AVO);
3784 term->curr_attr |= ATTR_UNDER;
3786 case 5: /* enable blink */
3787 compatibility(VT100AVO);
3788 term->curr_attr |= ATTR_BLINK;
3790 case 6: /* SCO light bkgrd */
3791 compatibility(SCOANSI);
3792 term->blink_is_real = FALSE;
3793 term->curr_attr |= ATTR_BLINK;
3794 term_schedule_tblink(term);
3796 case 7: /* enable reverse video */
3797 term->curr_attr |= ATTR_REVERSE;
3799 case 10: /* SCO acs off */
3800 compatibility(SCOANSI);
3801 if (term->no_remote_charset) break;
3802 term->sco_acs = 0; break;
3803 case 11: /* SCO acs on */
3804 compatibility(SCOANSI);
3805 if (term->no_remote_charset) break;
3806 term->sco_acs = 1; break;
3807 case 12: /* SCO acs on, |0x80 */
3808 compatibility(SCOANSI);
3809 if (term->no_remote_charset) break;
3810 term->sco_acs = 2; break;
3811 case 22: /* disable bold */
3812 compatibility2(OTHER, VT220);
3813 term->curr_attr &= ~ATTR_BOLD;
3815 case 24: /* disable underline */
3816 compatibility2(OTHER, VT220);
3817 term->curr_attr &= ~ATTR_UNDER;
3819 case 25: /* disable blink */
3820 compatibility2(OTHER, VT220);
3821 term->curr_attr &= ~ATTR_BLINK;
3823 case 27: /* disable reverse video */
3824 compatibility2(OTHER, VT220);
3825 term->curr_attr &= ~ATTR_REVERSE;
3836 term->curr_attr &= ~ATTR_FGMASK;
3838 (term->esc_args[i] - 30)<<ATTR_FGSHIFT;
3848 /* aixterm-style bright foreground */
3849 term->curr_attr &= ~ATTR_FGMASK;
3851 ((term->esc_args[i] - 90 + 8)
3854 case 39: /* default-foreground */
3855 term->curr_attr &= ~ATTR_FGMASK;
3856 term->curr_attr |= ATTR_DEFFG;
3867 term->curr_attr &= ~ATTR_BGMASK;
3869 (term->esc_args[i] - 40)<<ATTR_BGSHIFT;
3879 /* aixterm-style bright background */
3880 term->curr_attr &= ~ATTR_BGMASK;
3882 ((term->esc_args[i] - 100 + 8)
3885 case 49: /* default-background */
3886 term->curr_attr &= ~ATTR_BGMASK;
3887 term->curr_attr |= ATTR_DEFBG;
3889 case 38: /* xterm 256-colour mode */
3890 if (i+2 < term->esc_nargs &&
3891 term->esc_args[i+1] == 5) {
3892 term->curr_attr &= ~ATTR_FGMASK;
3894 ((term->esc_args[i+2] & 0xFF)
3899 case 48: /* xterm 256-colour mode */
3900 if (i+2 < term->esc_nargs &&
3901 term->esc_args[i+1] == 5) {
3902 term->curr_attr &= ~ATTR_BGMASK;
3904 ((term->esc_args[i+2] & 0xFF)
3911 set_erase_char(term);
3914 case 's': /* save cursor */
3915 save_cursor(term, TRUE);
3917 case 'u': /* restore cursor */
3918 save_cursor(term, FALSE);
3919 seen_disp_event(term);
3921 case 't': /* DECSLPP: set page size - ie window height */
3923 * VT340/VT420 sequence DECSLPP, DEC only allows values
3924 * 24/25/36/48/72/144 other emulators (eg dtterm) use
3925 * illegal values (eg first arg 1..9) for window changing
3928 if (term->esc_nargs <= 1
3929 && (term->esc_args[0] < 1 ||
3930 term->esc_args[0] >= 24)) {
3931 compatibility(VT340TEXT);
3932 if (!term->no_remote_resize)
3933 request_resize(term->frontend, term->cols,
3934 def(term->esc_args[0], 24));
3936 } else if (term->esc_nargs >= 1 &&
3937 term->esc_args[0] >= 1 &&
3938 term->esc_args[0] < 24) {
3939 compatibility(OTHER);
3941 switch (term->esc_args[0]) {
3945 set_iconic(term->frontend, FALSE);
3948 set_iconic(term->frontend, TRUE);
3951 if (term->esc_nargs >= 3) {
3952 if (!term->no_remote_resize)
3953 move_window(term->frontend,
3954 def(term->esc_args[1], 0),
3955 def(term->esc_args[2], 0));
3959 /* We should resize the window to a given
3960 * size in pixels here, but currently our
3961 * resizing code isn't healthy enough to
3966 set_zorder(term->frontend, TRUE);
3969 /* move to bottom */
3970 set_zorder(term->frontend, FALSE);
3973 refresh_window(term->frontend);
3976 if (term->esc_nargs >= 3) {
3977 if (!term->no_remote_resize)
3978 request_resize(term->frontend,
3979 def(term->esc_args[2], term->conf_width),
3980 def(term->esc_args[1], term->conf_height));
3984 if (term->esc_nargs >= 2)
3985 set_zoomed(term->frontend,
3991 ldisc_send(term->ldisc,
3992 is_iconic(term->frontend) ?
3993 "\033[2t" : "\033[1t", 4, 0);
3997 get_window_pos(term->frontend, &x, &y);
3998 len = sprintf(buf, "\033[3;%d;%dt", x, y);
3999 ldisc_send(term->ldisc, buf, len, 0);
4004 get_window_pixels(term->frontend, &x, &y);
4005 len = sprintf(buf, "\033[4;%d;%dt", y, x);
4006 ldisc_send(term->ldisc, buf, len, 0);
4011 len = sprintf(buf, "\033[8;%d;%dt",
4012 term->rows, term->cols);
4013 ldisc_send(term->ldisc, buf, len, 0);
4018 * Hmmm. Strictly speaking we
4019 * should return `the size of the
4020 * screen in characters', but
4021 * that's not easy: (a) window
4022 * furniture being what it is it's
4023 * hard to compute, and (b) in
4024 * resize-font mode maximising the
4025 * window wouldn't change the
4026 * number of characters. *shrug*. I
4027 * think we'll ignore it for the
4028 * moment and see if anyone
4029 * complains, and then ask them
4030 * what they would like it to do.
4035 term->remote_qtitle_action != TITLE_NONE) {
4036 if(term->remote_qtitle_action == TITLE_REAL)
4037 p = get_window_title(term->frontend, TRUE);
4039 p = EMPTY_WINDOW_TITLE;
4041 ldisc_send(term->ldisc, "\033]L", 3, 0);
4042 ldisc_send(term->ldisc, p, len, 0);
4043 ldisc_send(term->ldisc, "\033\\", 2, 0);
4048 term->remote_qtitle_action != TITLE_NONE) {
4049 if(term->remote_qtitle_action == TITLE_REAL)
4050 p = get_window_title(term->frontend, FALSE);
4052 p = EMPTY_WINDOW_TITLE;
4054 ldisc_send(term->ldisc, "\033]l", 3, 0);
4055 ldisc_send(term->ldisc, p, len, 0);
4056 ldisc_send(term->ldisc, "\033\\", 2, 0);
4062 case 'S': /* SU: Scroll up */
4063 compatibility(SCOANSI);
4064 scroll(term, term->marg_t, term->marg_b,
4065 def(term->esc_args[0], 1), TRUE);
4066 term->wrapnext = FALSE;
4067 seen_disp_event(term);
4069 case 'T': /* SD: Scroll down */
4070 compatibility(SCOANSI);
4071 scroll(term, term->marg_t, term->marg_b,
4072 -def(term->esc_args[0], 1), TRUE);
4073 term->wrapnext = FALSE;
4074 seen_disp_event(term);
4076 case ANSI('|', '*'): /* DECSNLS */
4078 * Set number of lines on screen
4079 * VT420 uses VGA like hardware and can
4080 * support any size in reasonable range
4081 * (24..49 AIUI) with no default specified.
4083 compatibility(VT420);
4084 if (term->esc_nargs == 1 && term->esc_args[0] > 0) {
4085 if (!term->no_remote_resize)
4086 request_resize(term->frontend, term->cols,
4087 def(term->esc_args[0],
4088 term->conf_height));
4092 case ANSI('|', '$'): /* DECSCPP */
4094 * Set number of columns per page
4095 * Docs imply range is only 80 or 132, but
4098 compatibility(VT340TEXT);
4099 if (term->esc_nargs <= 1) {
4100 if (!term->no_remote_resize)
4101 request_resize(term->frontend,
4102 def(term->esc_args[0],
4108 case 'X': /* ECH: write N spaces w/o moving cursor */
4109 /* XXX VTTEST says this is vt220, vt510 manual
4111 compatibility(ANSIMIN);
4113 int n = def(term->esc_args[0], 1);
4115 int p = term->curs.x;
4116 termline *cline = scrlineptr(term->curs.y);
4118 if (n > term->cols - term->curs.x)
4119 n = term->cols - term->curs.x;
4120 cursplus = term->curs;
4122 check_boundary(term, term->curs.x, term->curs.y);
4123 check_boundary(term, term->curs.x+n, term->curs.y);
4124 check_selection(term, term->curs, cursplus);
4126 copy_termchar(cline, p++,
4128 seen_disp_event(term);
4131 case 'x': /* DECREQTPARM: report terminal characteristics */
4132 compatibility(VT100);
4135 int i = def(term->esc_args[0], 0);
4136 if (i == 0 || i == 1) {
4137 strcpy(buf, "\033[2;1;1;112;112;1;0x");
4139 ldisc_send(term->ldisc, buf, 20, 0);
4144 compatibility(OTHER);
4146 int i = def(term->esc_args[0], 1);
4147 pos old_curs = term->curs;
4149 for(;i>0 && term->curs.x>0; i--) {
4152 } while (term->curs.x >0 &&
4153 !term->tabs[term->curs.x]);
4155 check_selection(term, old_curs, term->curs);
4158 case ANSI('c', '='): /* Hide or Show Cursor */
4159 compatibility(SCOANSI);
4160 switch(term->esc_args[0]) {
4161 case 0: /* hide cursor */
4162 term->cursor_on = FALSE;
4164 case 1: /* restore cursor */
4165 term->big_cursor = FALSE;
4166 term->cursor_on = TRUE;
4168 case 2: /* block cursor */
4169 term->big_cursor = TRUE;
4170 term->cursor_on = TRUE;
4174 case ANSI('C', '='):
4176 * set cursor start on scanline esc_args[0] and
4177 * end on scanline esc_args[1].If you set
4178 * the bottom scan line to a value less than
4179 * the top scan line, the cursor will disappear.
4181 compatibility(SCOANSI);
4182 if (term->esc_nargs >= 2) {
4183 if (term->esc_args[0] > term->esc_args[1])
4184 term->cursor_on = FALSE;
4186 term->cursor_on = TRUE;
4189 case ANSI('D', '='):
4190 compatibility(SCOANSI);
4191 term->blink_is_real = FALSE;
4192 term_schedule_tblink(term);
4193 if (term->esc_args[0]>=1)
4194 term->curr_attr |= ATTR_BLINK;
4196 term->curr_attr &= ~ATTR_BLINK;
4198 case ANSI('E', '='):
4199 compatibility(SCOANSI);
4200 term->blink_is_real = (term->esc_args[0] >= 1);
4201 term_schedule_tblink(term);
4203 case ANSI('F', '='): /* set normal foreground */
4204 compatibility(SCOANSI);
4205 if (term->esc_args[0] >= 0 && term->esc_args[0] < 16) {
4207 (sco2ansicolour[term->esc_args[0] & 0x7] |
4208 (term->esc_args[0] & 0x8)) <<
4210 term->curr_attr &= ~ATTR_FGMASK;
4211 term->curr_attr |= colour;
4212 term->default_attr &= ~ATTR_FGMASK;
4213 term->default_attr |= colour;
4214 set_erase_char(term);
4217 case ANSI('G', '='): /* set normal background */
4218 compatibility(SCOANSI);
4219 if (term->esc_args[0] >= 0 && term->esc_args[0] < 16) {
4221 (sco2ansicolour[term->esc_args[0] & 0x7] |
4222 (term->esc_args[0] & 0x8)) <<
4224 term->curr_attr &= ~ATTR_BGMASK;
4225 term->curr_attr |= colour;
4226 term->default_attr &= ~ATTR_BGMASK;
4227 term->default_attr |= colour;
4228 set_erase_char(term);
4231 case ANSI('L', '='):
4232 compatibility(SCOANSI);
4233 term->use_bce = (term->esc_args[0] <= 0);
4234 set_erase_char(term);
4236 case ANSI('p', '"'): /* DECSCL: set compat level */
4238 * Allow the host to make this emulator a
4239 * 'perfect' VT102. This first appeared in
4240 * the VT220, but we do need to get back to
4241 * PuTTY mode so I won't check it.
4243 * The arg in 40..42,50 are a PuTTY extension.
4244 * The 2nd arg, 8bit vs 7bit is not checked.
4246 * Setting VT102 mode should also change
4247 * the Fkeys to generate PF* codes as a
4248 * real VT102 has no Fkeys. The VT220 does
4249 * this, F11..F13 become ESC,BS,LF other
4250 * Fkeys send nothing.
4252 * Note ESC c will NOT change this!
4255 switch (term->esc_args[0]) {
4257 term->compatibility_level &= ~TM_VTXXX;
4258 term->compatibility_level |= TM_VT102;
4261 term->compatibility_level &= ~TM_VTXXX;
4262 term->compatibility_level |= TM_VT220;
4266 if (term->esc_args[0] > 60 &&
4267 term->esc_args[0] < 70)
4268 term->compatibility_level |= TM_VTXXX;
4272 term->compatibility_level &= TM_VTXXX;
4275 term->compatibility_level = TM_PUTTY;
4278 term->compatibility_level = TM_SCOANSI;
4282 term->compatibility_level = TM_PUTTY;
4288 /* Change the response to CSI c */
4289 if (term->esc_args[0] == 50) {
4292 strcpy(term->id_string, "\033[?");
4293 for (i = 1; i < term->esc_nargs; i++) {
4295 strcat(term->id_string, ";");
4296 sprintf(lbuf, "%d", term->esc_args[i]);
4297 strcat(term->id_string, lbuf);
4299 strcat(term->id_string, "c");
4302 /* Is this a good idea ?
4303 * Well we should do a soft reset at this point ...
4305 if (!has_compat(VT420) && has_compat(VT100)) {
4306 if (!term->no_remote_resize) {
4307 if (term->reset_132)
4308 request_resize(132, 24);
4310 request_resize(80, 24);
4318 term->osc_w = FALSE;
4320 case 'P': /* Linux palette sequence */
4321 term->termstate = SEEN_OSC_P;
4322 term->osc_strlen = 0;
4324 case 'R': /* Linux palette reset */
4325 palette_reset(term->frontend);
4326 term_invalidate(term);
4327 term->termstate = TOPLEVEL;
4329 case 'W': /* word-set */
4330 term->termstate = SEEN_OSC_W;
4343 term->esc_args[0] = 10 * term->esc_args[0] + c - '0';
4347 * Grotty hack to support xterm and DECterm title
4348 * sequences concurrently.
4350 if (term->esc_args[0] == 2) {
4351 term->esc_args[0] = 1;
4354 /* else fall through */
4356 term->termstate = OSC_STRING;
4357 term->osc_strlen = 0;
4362 * This OSC stuff is EVIL. It takes just one character to get into
4363 * sysline mode and it's not initially obvious how to get out.
4364 * So I've added CR and LF as string aborts.
4365 * This shouldn't effect compatibility as I believe embedded
4366 * control characters are supposed to be interpreted (maybe?)
4367 * and they don't display anything useful anyway.
4371 if (c == '\012' || c == '\015') {
4372 term->termstate = TOPLEVEL;
4373 } else if (c == 0234 || c == '\007') {
4375 * These characters terminate the string; ST and BEL
4376 * terminate the sequence and trigger instant
4377 * processing of it, whereas ESC goes back to SEEN_ESC
4378 * mode unless it is followed by \, in which case it is
4379 * synonymous with ST in the first place.
4382 term->termstate = TOPLEVEL;
4383 } else if (c == '\033')
4384 term->termstate = OSC_MAYBE_ST;
4385 else if (term->osc_strlen < OSC_STR_MAX)
4386 term->osc_string[term->osc_strlen++] = (char)c;
4390 int max = (term->osc_strlen == 0 ? 21 : 15);
4392 if ((int)c >= '0' && (int)c <= '9')
4394 else if ((int)c >= 'A' && (int)c <= 'A' + max - 10)
4396 else if ((int)c >= 'a' && (int)c <= 'a' + max - 10)
4399 term->termstate = TOPLEVEL;
4402 term->osc_string[term->osc_strlen++] = val;
4403 if (term->osc_strlen >= 7) {
4404 palette_set(term->frontend, term->osc_string[0],
4405 term->osc_string[1] * 16 + term->osc_string[2],
4406 term->osc_string[3] * 16 + term->osc_string[4],
4407 term->osc_string[5] * 16 + term->osc_string[6]);
4408 term_invalidate(term);
4409 term->termstate = TOPLEVEL;
4425 term->esc_args[0] = 10 * term->esc_args[0] + c - '0';
4428 term->termstate = OSC_STRING;
4429 term->osc_strlen = 0;
4433 term->termstate = TOPLEVEL;
4434 seen_disp_event(term);
4437 move(term, term->curs.x, term->curs.y - 1, 1);
4440 move(term, term->curs.x, term->curs.y + 1, 1);
4443 move(term, term->curs.x + 1, term->curs.y, 1);
4446 move(term, term->curs.x - 1, term->curs.y, 1);
4449 * From the VT100 Manual
4450 * NOTE: The special graphics characters in the VT100
4451 * are different from those in the VT52
4453 * From VT102 manual:
4454 * 137 _ Blank - Same
4455 * 140 ` Reserved - Humm.
4456 * 141 a Solid rectangle - Similar
4457 * 142 b 1/ - Top half of fraction for the
4458 * 143 c 3/ - subscript numbers below.
4461 * 146 f Degrees - Same
4462 * 147 g Plus or minus - Same
4464 * 151 i Ellipsis (dots)
4467 * 154 l Bar at scan 0
4468 * 155 m Bar at scan 1
4469 * 156 n Bar at scan 2
4470 * 157 o Bar at scan 3 - Similar
4471 * 160 p Bar at scan 4 - Similar
4472 * 161 q Bar at scan 5 - Similar
4473 * 162 r Bar at scan 6 - Same
4474 * 163 s Bar at scan 7 - Similar
4489 term->cset_attr[term->cset = 0] = CSET_LINEDRW;
4492 term->cset_attr[term->cset = 0] = CSET_ASCII;
4495 move(term, 0, 0, 0);
4498 if (term->curs.y == 0)
4499 scroll(term, 0, term->rows - 1, -1, TRUE);
4500 else if (term->curs.y > 0)
4502 term->wrapnext = FALSE;
4505 erase_lots(term, FALSE, FALSE, TRUE);
4506 if (term->scroll_on_disp)
4510 erase_lots(term, TRUE, FALSE, TRUE);
4514 /* XXX Print cursor line */
4517 /* XXX Start controller mode */
4520 /* XXX Stop controller mode */
4524 term->termstate = VT52_Y1;
4528 ldisc_send(term->ldisc, "\033/Z", 3, 0);
4531 term->app_keypad_keys = TRUE;
4534 term->app_keypad_keys = FALSE;
4537 /* XXX This should switch to VT100 mode not current or default
4538 * VT mode. But this will only have effect in a VT220+
4541 term->vt52_mode = FALSE;
4542 term->blink_is_real = term->blinktext;
4543 term_schedule_tblink(term);
4547 /* XXX Enter auto print mode */
4550 /* XXX Exit auto print mode */
4553 /* XXX Print screen */
4559 /* compatibility(ATARI) */
4560 move(term, 0, 0, 0);
4561 erase_lots(term, FALSE, FALSE, TRUE);
4562 if (term->scroll_on_disp)
4566 /* compatibility(ATARI) */
4567 if (term->curs.y <= term->marg_b)
4568 scroll(term, term->curs.y, term->marg_b, -1, FALSE);
4571 /* compatibility(ATARI) */
4572 if (term->curs.y <= term->marg_b)
4573 scroll(term, term->curs.y, term->marg_b, 1, TRUE);
4576 /* compatibility(ATARI) */
4577 term->termstate = VT52_FG;
4580 /* compatibility(ATARI) */
4581 term->termstate = VT52_BG;
4584 /* compatibility(ATARI) */
4585 erase_lots(term, FALSE, TRUE, FALSE);
4586 if (term->scroll_on_disp)
4590 /* compatibility(ATARI) */
4591 term->cursor_on = TRUE;
4594 /* compatibility(ATARI) */
4595 term->cursor_on = FALSE;
4597 /* case 'j': Save cursor position - broken on ST */
4598 /* case 'k': Restore cursor position */
4600 /* compatibility(ATARI) */
4601 erase_lots(term, TRUE, TRUE, TRUE);
4603 term->wrapnext = FALSE;
4606 /* compatibility(ATARI) */
4607 erase_lots(term, TRUE, TRUE, FALSE);
4610 /* compatibility(ATARI) */
4611 term->curr_attr |= ATTR_REVERSE;
4614 /* compatibility(ATARI) */
4615 term->curr_attr &= ~ATTR_REVERSE;
4617 case 'v': /* wrap Autowrap on - Wyse style */
4618 /* compatibility(ATARI) */
4621 case 'w': /* Autowrap off */
4622 /* compatibility(ATARI) */
4627 /* compatibility(OTHER) */
4628 term->vt52_bold = FALSE;
4629 term->curr_attr = ATTR_DEFAULT;
4630 set_erase_char(term);
4633 /* compatibility(VI50) */
4634 term->curr_attr |= ATTR_UNDER;
4637 /* compatibility(VI50) */
4638 term->curr_attr &= ~ATTR_UNDER;
4641 /* compatibility(VI50) */
4642 term->vt52_bold = TRUE;
4643 term->curr_attr |= ATTR_BOLD;
4646 /* compatibility(VI50) */
4647 term->vt52_bold = FALSE;
4648 term->curr_attr &= ~ATTR_BOLD;
4654 term->termstate = VT52_Y2;
4655 move(term, term->curs.x, c - ' ', 0);
4658 term->termstate = TOPLEVEL;
4659 move(term, c - ' ', term->curs.y, 0);
4664 term->termstate = TOPLEVEL;
4665 term->curr_attr &= ~ATTR_FGMASK;
4666 term->curr_attr &= ~ATTR_BOLD;
4667 term->curr_attr |= (c & 0xF) << ATTR_FGSHIFT;
4668 set_erase_char(term);
4671 term->termstate = TOPLEVEL;
4672 term->curr_attr &= ~ATTR_BGMASK;
4673 term->curr_attr &= ~ATTR_BLINK;
4674 term->curr_attr |= (c & 0xF) << ATTR_BGSHIFT;
4675 set_erase_char(term);
4678 default: break; /* placate gcc warning about enum use */
4680 if (term->selstate != NO_SELECTION) {
4681 pos cursplus = term->curs;
4683 check_selection(term, term->curs, cursplus);
4687 term_print_flush(term);
4689 logflush(term->logctx);
4693 * To prevent having to run the reasonably tricky bidi algorithm
4694 * too many times, we maintain a cache of the last lineful of data
4695 * fed to the algorithm on each line of the display.
4697 static int term_bidi_cache_hit(Terminal *term, int line,
4698 termchar *lbefore, int width)
4702 if (!term->pre_bidi_cache)
4703 return FALSE; /* cache doesn't even exist yet! */
4705 if (line >= term->bidi_cache_size)
4706 return FALSE; /* cache doesn't have this many lines */
4708 if (!term->pre_bidi_cache[line].chars)
4709 return FALSE; /* cache doesn't contain _this_ line */
4711 if (term->pre_bidi_cache[line].width != width)
4712 return FALSE; /* line is wrong width */
4714 for (i = 0; i < width; i++)
4715 if (!termchars_equal(term->pre_bidi_cache[line].chars+i, lbefore+i))
4716 return FALSE; /* line doesn't match cache */
4718 return TRUE; /* it didn't match. */
4721 static void term_bidi_cache_store(Terminal *term, int line, termchar *lbefore,
4722 termchar *lafter, bidi_char *wcTo,
4723 int width, int size)
4727 if (!term->pre_bidi_cache || term->bidi_cache_size <= line) {
4728 int j = term->bidi_cache_size;
4729 term->bidi_cache_size = line+1;
4730 term->pre_bidi_cache = sresize(term->pre_bidi_cache,
4731 term->bidi_cache_size,
4732 struct bidi_cache_entry);
4733 term->post_bidi_cache = sresize(term->post_bidi_cache,
4734 term->bidi_cache_size,
4735 struct bidi_cache_entry);
4736 while (j < term->bidi_cache_size) {
4737 term->pre_bidi_cache[j].chars =
4738 term->post_bidi_cache[j].chars = NULL;
4739 term->pre_bidi_cache[j].width =
4740 term->post_bidi_cache[j].width = -1;
4741 term->pre_bidi_cache[j].forward =
4742 term->post_bidi_cache[j].forward = NULL;
4743 term->pre_bidi_cache[j].backward =
4744 term->post_bidi_cache[j].backward = NULL;
4749 sfree(term->pre_bidi_cache[line].chars);
4750 sfree(term->post_bidi_cache[line].chars);
4751 sfree(term->post_bidi_cache[line].forward);
4752 sfree(term->post_bidi_cache[line].backward);
4754 term->pre_bidi_cache[line].width = width;
4755 term->pre_bidi_cache[line].chars = snewn(size, termchar);
4756 term->post_bidi_cache[line].width = width;
4757 term->post_bidi_cache[line].chars = snewn(size, termchar);
4758 term->post_bidi_cache[line].forward = snewn(width, int);
4759 term->post_bidi_cache[line].backward = snewn(width, int);
4761 memcpy(term->pre_bidi_cache[line].chars, lbefore, size * TSIZE);
4762 memcpy(term->post_bidi_cache[line].chars, lafter, size * TSIZE);
4763 memset(term->post_bidi_cache[line].forward, 0, width * sizeof(int));
4764 memset(term->post_bidi_cache[line].backward, 0, width * sizeof(int));
4766 for (i = 0; i < width; i++) {
4767 int p = wcTo[i].index;
4769 assert(0 <= p && p < width);
4771 term->post_bidi_cache[line].backward[i] = p;
4772 term->post_bidi_cache[line].forward[p] = i;
4777 * Prepare the bidi information for a screen line. Returns the
4778 * transformed list of termchars, or NULL if no transformation at
4779 * all took place (because bidi is disabled). If return was
4780 * non-NULL, auxiliary information such as the forward and reverse
4781 * mappings of permutation position are available in
4782 * term->post_bidi_cache[scr_y].*.
4784 static termchar *term_bidi_line(Terminal *term, struct termline *ldata,
4790 /* Do Arabic shaping and bidi. */
4791 if(!term->bidi || !term->arabicshaping) {
4793 if (!term_bidi_cache_hit(term, scr_y, ldata->chars, term->cols)) {
4795 if (term->wcFromTo_size < term->cols) {
4796 term->wcFromTo_size = term->cols;
4797 term->wcFrom = sresize(term->wcFrom, term->wcFromTo_size,
4799 term->wcTo = sresize(term->wcTo, term->wcFromTo_size,
4803 for(it=0; it<term->cols ; it++)
4805 unsigned long uc = (ldata->chars[it].chr);
4807 switch (uc & CSET_MASK) {
4809 if (!term->rawcnp) {
4810 uc = term->ucsdata->unitab_xterm[uc & 0xFF];
4814 uc = term->ucsdata->unitab_line[uc & 0xFF];
4817 uc = term->ucsdata->unitab_scoacs[uc&0xFF];
4820 switch (uc & CSET_MASK) {
4822 uc = term->ucsdata->unitab_font[uc & 0xFF];
4825 uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
4829 term->wcFrom[it].origwc = term->wcFrom[it].wc =
4831 term->wcFrom[it].index = it;
4835 do_bidi(term->wcFrom, term->cols);
4837 /* this is saved iff done from inside the shaping */
4838 if(!term->bidi && term->arabicshaping)
4839 for(it=0; it<term->cols; it++)
4840 term->wcTo[it] = term->wcFrom[it];
4842 if(!term->arabicshaping)
4843 do_shape(term->wcFrom, term->wcTo, term->cols);
4845 if (term->ltemp_size < ldata->size) {
4846 term->ltemp_size = ldata->size;
4847 term->ltemp = sresize(term->ltemp, term->ltemp_size,
4851 memcpy(term->ltemp, ldata->chars, ldata->size * TSIZE);
4853 for(it=0; it<term->cols ; it++)
4855 term->ltemp[it] = ldata->chars[term->wcTo[it].index];
4856 if (term->ltemp[it].cc_next)
4857 term->ltemp[it].cc_next -=
4858 it - term->wcTo[it].index;
4860 if (term->wcTo[it].origwc != term->wcTo[it].wc)
4861 term->ltemp[it].chr = term->wcTo[it].wc;
4863 term_bidi_cache_store(term, scr_y, ldata->chars,
4864 term->ltemp, term->wcTo,
4865 term->cols, ldata->size);
4867 lchars = term->ltemp;
4869 lchars = term->post_bidi_cache[scr_y].chars;
4879 * Given a context, update the window. Out of paranoia, we don't
4880 * allow WM_PAINT responses to do scrolling optimisations.
4882 static void do_paint(Terminal *term, Context ctx, int may_optimise)
4884 int i, j, our_curs_y, our_curs_x;
4889 #ifdef OPTIMISE_SCROLL
4890 struct scrollregion *sr;
4891 #endif /* OPTIMISE_SCROLL */
4895 ch = snewn(chlen, wchar_t);
4897 newline = snewn(term->cols, termchar);
4899 rv = (!term->rvideo ^ !term->in_vbell ? ATTR_REVERSE : 0);
4902 * screen array, disptop, scrtop,
4904 * blinkpc, blink_is_real, tblinker,
4905 * curs.y, curs.x, cblinker, blink_cur, cursor_on, has_focus, wrapnext
4908 /* Has the cursor position or type changed ? */
4909 if (term->cursor_on) {
4910 if (term->has_focus) {
4911 if (term->cblinker || !term->blink_cur)
4912 cursor = TATTR_ACTCURS;
4916 cursor = TATTR_PASCURS;
4918 cursor |= TATTR_RIGHTCURS;
4921 our_curs_y = term->curs.y - term->disptop;
4924 * Adjust the cursor position:
4926 * - in the case where it's resting on the right-hand half
4927 * of a CJK wide character. xterm's behaviour here,
4928 * which seems adequate to me, is to display the cursor
4929 * covering the _whole_ character, exactly as if it were
4930 * one space to the left.
4932 termline *ldata = lineptr(term->curs.y);
4935 our_curs_x = term->curs.x;
4937 if ( (lchars = term_bidi_line(term, ldata, our_curs_y)) != NULL) {
4938 our_curs_x = term->post_bidi_cache[our_curs_y].forward[our_curs_x];
4940 lchars = ldata->chars;
4942 if (our_curs_x > 0 &&
4943 lchars[our_curs_x].chr == UCSWIDE)
4950 * If the cursor is not where it was last time we painted, and
4951 * its previous position is visible on screen, invalidate its
4952 * previous position.
4954 if (term->dispcursy >= 0 &&
4955 (term->curstype != cursor ||
4956 term->dispcursy != our_curs_y ||
4957 term->dispcursx != our_curs_x)) {
4958 termchar *dispcurs = term->disptext[term->dispcursy]->chars +
4961 if (term->dispcursx > 0 && dispcurs->chr == UCSWIDE)
4962 dispcurs[-1].attr |= ATTR_INVALID;
4963 if (term->dispcursx < term->cols-1 && dispcurs[1].chr == UCSWIDE)
4964 dispcurs[1].attr |= ATTR_INVALID;
4965 dispcurs->attr |= ATTR_INVALID;
4969 term->dispcursx = term->dispcursy = -1;
4971 #ifdef OPTIMISE_SCROLL
4973 sr = term->scrollhead;
4975 struct scrollregion *next = sr->next;
4976 do_scroll(ctx, sr->topline, sr->botline, sr->lines);
4980 term->scrollhead = term->scrolltail = NULL;
4981 #endif /* OPTIMISE_SCROLL */
4983 /* The normal screen data */
4984 for (i = 0; i < term->rows; i++) {
4987 int dirty_line, dirty_run, selected;
4988 unsigned long attr = 0, cset = 0;
4991 int last_run_dirty = 0;
4992 int laststart, dirtyrect;
4995 scrpos.y = i + term->disptop;
4996 ldata = lineptr(scrpos.y);
4998 /* Do Arabic shaping and bidi. */
4999 lchars = term_bidi_line(term, ldata, i);
5001 backward = term->post_bidi_cache[i].backward;
5003 lchars = ldata->chars;
5008 * First loop: work along the line deciding what we want
5009 * each character cell to look like.
5011 for (j = 0; j < term->cols; j++) {
5012 unsigned long tattr, tchar;
5013 termchar *d = lchars + j;
5014 scrpos.x = backward ? backward[j] : j;
5019 if (!term->ansi_colour)
5020 tattr = (tattr & ~(ATTR_FGMASK | ATTR_BGMASK)) |
5021 ATTR_DEFFG | ATTR_DEFBG;
5023 if (!term->xterm_256_colour) {
5025 colour = (tattr & ATTR_FGMASK) >> ATTR_FGSHIFT;
5026 if (colour >= 16 && colour < 256)
5027 tattr = (tattr &~ ATTR_FGMASK) | ATTR_DEFFG;
5028 colour = (tattr & ATTR_BGMASK) >> ATTR_BGSHIFT;
5029 if (colour >= 16 && colour < 256)
5030 tattr = (tattr &~ ATTR_BGMASK) | ATTR_DEFBG;
5033 switch (tchar & CSET_MASK) {
5035 tchar = term->ucsdata->unitab_line[tchar & 0xFF];
5038 tchar = term->ucsdata->unitab_xterm[tchar & 0xFF];
5041 tchar = term->ucsdata->unitab_scoacs[tchar&0xFF];
5044 if (j < term->cols-1 && d[1].chr == UCSWIDE)
5047 /* Video reversing things */
5048 if (term->selstate == DRAGGING || term->selstate == SELECTED) {
5049 if (term->seltype == LEXICOGRAPHIC)
5050 selected = (posle(term->selstart, scrpos) &&
5051 poslt(scrpos, term->selend));
5053 selected = (posPle(term->selstart, scrpos) &&
5054 posPlt(scrpos, term->selend));
5058 ^ (selected ? ATTR_REVERSE : 0));
5060 /* 'Real' blinking ? */
5061 if (term->blink_is_real && (tattr & ATTR_BLINK)) {
5062 if (term->has_focus && term->tblinker) {
5063 tchar = term->ucsdata->unitab_line[(unsigned char)' '];
5065 tattr &= ~ATTR_BLINK;
5069 * Check the font we'll _probably_ be using to see if
5070 * the character is wide when we don't want it to be.
5072 if (tchar != term->disptext[i]->chars[j].chr ||
5073 tattr != (term->disptext[i]->chars[j].attr &~
5074 (ATTR_NARROW | DATTR_MASK))) {
5075 if ((tattr & ATTR_WIDE) == 0 && char_width(ctx, tchar) == 2)
5076 tattr |= ATTR_NARROW;
5077 } else if (term->disptext[i]->chars[j].attr & ATTR_NARROW)
5078 tattr |= ATTR_NARROW;
5080 if (i == our_curs_y && j == our_curs_x) {
5082 term->curstype = cursor;
5083 term->dispcursx = j;
5084 term->dispcursy = i;
5088 newline[j].attr = tattr;
5089 newline[j].chr = tchar;
5090 /* Combining characters are still read from lchars */
5091 newline[j].cc_next = 0;
5095 * Now loop over the line again, noting where things have
5098 * During this loop, we keep track of where we last saw
5099 * DATTR_STARTRUN. Any mismatch automatically invalidates
5100 * _all_ of the containing run that was last printed: that
5101 * is, any rectangle that was drawn in one go in the
5102 * previous update should be either left completely alone
5103 * or overwritten in its entirety. This, along with the
5104 * expectation that front ends clip all text runs to their
5105 * bounding rectangle, should solve any possible problems
5106 * with fonts that overflow their character cells.
5110 for (j = 0; j < term->cols; j++) {
5111 if (term->disptext[i]->chars[j].attr & DATTR_STARTRUN) {
5116 if (term->disptext[i]->chars[j].chr != newline[j].chr ||
5117 (term->disptext[i]->chars[j].attr &~ DATTR_MASK)
5118 != newline[j].attr) {
5122 for (k = laststart; k < j; k++)
5123 term->disptext[i]->chars[k].attr |= ATTR_INVALID;
5130 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5134 * Finally, loop once more and actually do the drawing.
5136 dirty_run = dirty_line = (ldata->lattr !=
5137 term->disptext[i]->lattr);
5138 term->disptext[i]->lattr = ldata->lattr;
5140 for (j = 0; j < term->cols; j++) {
5141 unsigned long tattr, tchar;
5142 int break_run, do_copy;
5143 termchar *d = lchars + j;
5145 tattr = newline[j].attr;
5146 tchar = newline[j].chr;
5148 if ((term->disptext[i]->chars[j].attr ^ tattr) & ATTR_WIDE)
5151 break_run = ((tattr ^ attr) & term->attr_mask) != 0;
5153 #ifdef USES_VTLINE_HACK
5154 /* Special hack for VT100 Linedraw glyphs */
5155 if ((tchar >= 0x23BA && tchar <= 0x23BD) ||
5156 (j > 0 && (newline[j-1].chr >= 0x23BA &&
5157 newline[j-1].chr <= 0x23BD)))
5162 * Separate out sequences of characters that have the
5163 * same CSET, if that CSET is a magic one.
5165 if (CSET_OF(tchar) != cset)
5169 * Break on both sides of any combined-character cell.
5171 if (d->cc_next != 0 ||
5172 (j > 0 && d[-1].cc_next != 0))
5175 if (!term->ucsdata->dbcs_screenfont && !dirty_line) {
5176 if (term->disptext[i]->chars[j].chr == tchar &&
5177 (term->disptext[i]->chars[j].attr &~ DATTR_MASK) == tattr)
5179 else if (!dirty_run && ccount == 1)
5184 if ((dirty_run || last_run_dirty) && ccount > 0) {
5185 do_text(ctx, start, i, ch, ccount, attr,
5187 if (attr & (TATTR_ACTCURS | TATTR_PASCURS))
5188 do_cursor(ctx, start, i, ch, ccount, attr,
5194 cset = CSET_OF(tchar);
5195 if (term->ucsdata->dbcs_screenfont)
5196 last_run_dirty = dirty_run;
5197 dirty_run = dirty_line;
5201 if (!termchars_equal_override(&term->disptext[i]->chars[j],
5207 if (ccount+2 > chlen) {
5208 chlen = ccount + 256;
5209 ch = sresize(ch, chlen, wchar_t);
5212 #ifdef PLATFORM_IS_UTF16
5213 if (tchar > 0x10000 && tchar < 0x110000) {
5214 ch[ccount++] = (wchar_t) HIGH_SURROGATE_OF(tchar);
5215 ch[ccount++] = (wchar_t) LOW_SURROGATE_OF(tchar);
5217 #endif /* PLATFORM_IS_UTF16 */
5218 ch[ccount++] = (wchar_t) tchar;
5223 while (dd->cc_next) {
5224 unsigned long schar;
5229 switch (schar & CSET_MASK) {
5231 schar = term->ucsdata->unitab_line[schar & 0xFF];
5234 schar = term->ucsdata->unitab_xterm[schar & 0xFF];
5237 schar = term->ucsdata->unitab_scoacs[schar&0xFF];
5241 if (ccount+2 > chlen) {
5242 chlen = ccount + 256;
5243 ch = sresize(ch, chlen, wchar_t);
5246 #ifdef PLATFORM_IS_UTF16
5247 if (schar > 0x10000 && schar < 0x110000) {
5248 ch[ccount++] = (wchar_t) HIGH_SURROGATE_OF(schar);
5249 ch[ccount++] = (wchar_t) LOW_SURROGATE_OF(schar);
5251 #endif /* PLATFORM_IS_UTF16 */
5252 ch[ccount++] = (wchar_t) schar;
5255 attr |= TATTR_COMBINING;
5259 copy_termchar(term->disptext[i], j, d);
5260 term->disptext[i]->chars[j].chr = tchar;
5261 term->disptext[i]->chars[j].attr = tattr;
5263 term->disptext[i]->chars[j].attr |= DATTR_STARTRUN;
5266 /* If it's a wide char step along to the next one. */
5267 if (tattr & ATTR_WIDE) {
5268 if (++j < term->cols) {
5271 * By construction above, the cursor should not
5272 * be on the right-hand half of this character.
5275 assert(!(i == our_curs_y && j == our_curs_x));
5276 if (!termchars_equal(&term->disptext[i]->chars[j], d))
5278 copy_termchar(term->disptext[i], j, d);
5282 if (dirty_run && ccount > 0) {
5283 do_text(ctx, start, i, ch, ccount, attr,
5285 if (attr & (TATTR_ACTCURS | TATTR_PASCURS))
5286 do_cursor(ctx, start, i, ch, ccount, attr,
5298 * Invalidate the whole screen so it will be repainted in full.
5300 void term_invalidate(Terminal *term)
5304 for (i = 0; i < term->rows; i++)
5305 for (j = 0; j < term->cols; j++)
5306 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5308 term_schedule_update(term);
5312 * Paint the window in response to a WM_PAINT message.
5314 void term_paint(Terminal *term, Context ctx,
5315 int left, int top, int right, int bottom, int immediately)
5318 if (left < 0) left = 0;
5319 if (top < 0) top = 0;
5320 if (right >= term->cols) right = term->cols-1;
5321 if (bottom >= term->rows) bottom = term->rows-1;
5323 for (i = top; i <= bottom && i < term->rows; i++) {
5324 if ((term->disptext[i]->lattr & LATTR_MODE) == LATTR_NORM)
5325 for (j = left; j <= right && j < term->cols; j++)
5326 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5328 for (j = left / 2; j <= right / 2 + 1 && j < term->cols; j++)
5329 term->disptext[i]->chars[j].attr |= ATTR_INVALID;
5333 do_paint (term, ctx, FALSE);
5335 term_schedule_update(term);
5340 * Attempt to scroll the scrollback. The second parameter gives the
5341 * position we want to scroll to; the first is +1 to denote that
5342 * this position is relative to the beginning of the scrollback, -1
5343 * to denote it is relative to the end, and 0 to denote that it is
5344 * relative to the current position.
5346 void term_scroll(Terminal *term, int rel, int where)
5348 int sbtop = -sblines(term);
5349 #ifdef OPTIMISE_SCROLL
5350 int olddisptop = term->disptop;
5352 #endif /* OPTIMISE_SCROLL */
5354 term->disptop = (rel < 0 ? 0 : rel > 0 ? sbtop : term->disptop) + where;
5355 if (term->disptop < sbtop)
5356 term->disptop = sbtop;
5357 if (term->disptop > 0)
5360 #ifdef OPTIMISE_SCROLL
5361 shift = (term->disptop - olddisptop);
5362 if (shift < term->rows && shift > -term->rows)
5363 scroll_display(term, 0, term->rows - 1, shift);
5364 #endif /* OPTIMISE_SCROLL */
5369 * Scroll the scrollback to centre it on the beginning or end of the
5370 * current selection, if any.
5372 void term_scroll_to_selection(Terminal *term, int which_end)
5376 int sbtop = -sblines(term);
5378 if (term->selstate != SELECTED)
5381 target = term->selend;
5383 target = term->selstart;
5385 y = target.y - term->rows/2;
5390 term_scroll(term, -1, y);
5394 * Helper routine for clipme(): growing buffer.
5397 int buflen; /* amount of allocated space in textbuf/attrbuf */
5398 int bufpos; /* amount of actual data */
5399 wchar_t *textbuf; /* buffer for copied text */
5400 wchar_t *textptr; /* = textbuf + bufpos (current insertion point) */
5401 int *attrbuf; /* buffer for copied attributes */
5402 int *attrptr; /* = attrbuf + bufpos */
5405 static void clip_addchar(clip_workbuf *b, wchar_t chr, int attr)
5407 if (b->bufpos >= b->buflen) {
5409 b->textbuf = sresize(b->textbuf, b->buflen, wchar_t);
5410 b->textptr = b->textbuf + b->bufpos;
5411 b->attrbuf = sresize(b->attrbuf, b->buflen, int);
5412 b->attrptr = b->attrbuf + b->bufpos;
5414 *b->textptr++ = chr;
5415 *b->attrptr++ = attr;
5419 static void clipme(Terminal *term, pos top, pos bottom, int rect, int desel)
5427 buf.textptr = buf.textbuf = snewn(buf.buflen, wchar_t);
5428 buf.attrptr = buf.attrbuf = snewn(buf.buflen, int);
5430 old_top_x = top.x; /* needed for rect==1 */
5432 while (poslt(top, bottom)) {
5434 termline *ldata = lineptr(top.y);
5438 * nlpos will point at the maximum position on this line we
5439 * should copy up to. So we start it at the end of the
5443 nlpos.x = term->cols;
5446 * ... move it backwards if there's unused space at the end
5447 * of the line (and also set `nl' if this is the case,
5448 * because in normal selection mode this means we need a
5449 * newline at the end)...
5451 if (!(ldata->lattr & LATTR_WRAPPED)) {
5453 IS_SPACE_CHR(ldata->chars[nlpos.x - 1].chr) &&
5454 !ldata->chars[nlpos.x - 1].cc_next &&
5457 if (poslt(nlpos, bottom))
5459 } else if (ldata->lattr & LATTR_WRAPPED2) {
5460 /* Ignore the last char on the line in a WRAPPED2 line. */
5465 * ... and then clip it to the terminal x coordinate if
5466 * we're doing rectangular selection. (In this case we
5467 * still did the above, so that copying e.g. the right-hand
5468 * column from a table doesn't fill with spaces on the
5472 if (nlpos.x > bottom.x)
5474 nl = (top.y < bottom.y);
5477 while (poslt(top, bottom) && poslt(top, nlpos)) {
5480 sprintf(cbuf, "<U+%04x>", (ldata[top.x] & 0xFFFF));
5482 wchar_t cbuf[16], *p;
5486 if (ldata->chars[x].chr == UCSWIDE) {
5492 int uc = ldata->chars[x].chr;
5493 attr = ldata->chars[x].attr;
5495 switch (uc & CSET_MASK) {
5497 if (!term->rawcnp) {
5498 uc = term->ucsdata->unitab_xterm[uc & 0xFF];
5502 uc = term->ucsdata->unitab_line[uc & 0xFF];
5505 uc = term->ucsdata->unitab_scoacs[uc&0xFF];
5508 switch (uc & CSET_MASK) {
5510 uc = term->ucsdata->unitab_font[uc & 0xFF];
5513 uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
5517 c = (uc & ~CSET_MASK);
5518 #ifdef PLATFORM_IS_UTF16
5519 if (uc > 0x10000 && uc < 0x110000) {
5520 cbuf[0] = 0xD800 | ((uc - 0x10000) >> 10);
5521 cbuf[1] = 0xDC00 | ((uc - 0x10000) & 0x3FF);
5530 if (DIRECT_FONT(uc)) {
5531 if (c >= ' ' && c != 0x7F) {
5535 if (is_dbcs_leadbyte(term->ucsdata->font_codepage, (BYTE) c)) {
5537 buf[1] = (char) (0xFF & ldata->chars[top.x + 1].chr);
5538 rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 2, wbuf, 4);
5542 rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 1, wbuf, 4);
5546 memcpy(cbuf, wbuf, rv * sizeof(wchar_t));
5553 for (p = cbuf; *p; p++)
5554 clip_addchar(&buf, *p, attr);
5556 if (ldata->chars[x].cc_next)
5557 x += ldata->chars[x].cc_next;
5565 for (i = 0; i < sel_nl_sz; i++)
5566 clip_addchar(&buf, sel_nl[i], 0);
5569 top.x = rect ? old_top_x : 0;
5573 #if SELECTION_NUL_TERMINATED
5574 clip_addchar(&buf, 0, 0);
5576 /* Finally, transfer all that to the clipboard. */
5577 write_clip(term->frontend, buf.textbuf, buf.attrbuf, buf.bufpos, desel);
5582 void term_copyall(Terminal *term)
5586 tree234 *screen = term->screen;
5587 top.y = -sblines(term);
5589 bottom.y = find_last_nonempty_line(term, screen);
5590 bottom.x = term->cols;
5591 clipme(term, top, bottom, 0, TRUE);
5595 * The wordness array is mainly for deciding the disposition of the
5596 * US-ASCII characters.
5598 static int wordtype(Terminal *term, int uc)
5601 int start, end, ctype;
5603 static const struct ucsword ucs_words[] = {
5609 0x037e, 0x037e, 1}, /* Greek question mark */
5611 0x0387, 0x0387, 1}, /* Greek ano teleia */
5613 0x055a, 0x055f, 1}, /* Armenian punctuation */
5615 0x0589, 0x0589, 1}, /* Armenian full stop */
5617 0x0700, 0x070d, 1}, /* Syriac punctuation */
5619 0x104a, 0x104f, 1}, /* Myanmar punctuation */
5621 0x10fb, 0x10fb, 1}, /* Georgian punctuation */
5623 0x1361, 0x1368, 1}, /* Ethiopic punctuation */
5625 0x166d, 0x166e, 1}, /* Canadian Syl. punctuation */
5627 0x17d4, 0x17dc, 1}, /* Khmer punctuation */
5629 0x1800, 0x180a, 1}, /* Mongolian punctuation */
5631 0x2000, 0x200a, 0}, /* Various spaces */
5633 0x2070, 0x207f, 2}, /* superscript */
5635 0x2080, 0x208f, 2}, /* subscript */
5637 0x200b, 0x27ff, 1}, /* punctuation and symbols */
5639 0x3000, 0x3000, 0}, /* ideographic space */
5641 0x3001, 0x3020, 1}, /* ideographic punctuation */
5643 0x303f, 0x309f, 3}, /* Hiragana */
5645 0x30a0, 0x30ff, 3}, /* Katakana */
5647 0x3300, 0x9fff, 3}, /* CJK Ideographs */
5649 0xac00, 0xd7a3, 3}, /* Hangul Syllables */
5651 0xf900, 0xfaff, 3}, /* CJK Ideographs */
5653 0xfe30, 0xfe6b, 1}, /* punctuation forms */
5655 0xff00, 0xff0f, 1}, /* half/fullwidth ASCII */
5657 0xff1a, 0xff20, 1}, /* half/fullwidth ASCII */
5659 0xff3b, 0xff40, 1}, /* half/fullwidth ASCII */
5661 0xff5b, 0xff64, 1}, /* half/fullwidth ASCII */
5663 0xfff0, 0xffff, 0}, /* half/fullwidth ASCII */
5667 const struct ucsword *wptr;
5669 switch (uc & CSET_MASK) {
5671 uc = term->ucsdata->unitab_xterm[uc & 0xFF];
5674 uc = term->ucsdata->unitab_line[uc & 0xFF];
5677 uc = term->ucsdata->unitab_scoacs[uc&0xFF];
5680 switch (uc & CSET_MASK) {
5682 uc = term->ucsdata->unitab_font[uc & 0xFF];
5685 uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
5689 /* For DBCS fonts I can't do anything useful. Even this will sometimes
5690 * fail as there's such a thing as a double width space. :-(
5692 if (term->ucsdata->dbcs_screenfont &&
5693 term->ucsdata->font_codepage == term->ucsdata->line_codepage)
5697 return term->wordness[uc];
5699 for (wptr = ucs_words; wptr->start; wptr++) {
5700 if (uc >= wptr->start && uc <= wptr->end)
5708 * Spread the selection outwards according to the selection mode.
5710 static pos sel_spread_half(Terminal *term, pos p, int dir)
5714 int topy = -sblines(term);
5716 ldata = lineptr(p.y);
5718 switch (term->selmode) {
5721 * In this mode, every character is a separate unit, except
5722 * for runs of spaces at the end of a non-wrapping line.
5724 if (!(ldata->lattr & LATTR_WRAPPED)) {
5725 termchar *q = ldata->chars + term->cols;
5726 while (q > ldata->chars &&
5727 IS_SPACE_CHR(q[-1].chr) && !q[-1].cc_next)
5729 if (q == ldata->chars + term->cols)
5731 if (p.x >= q - ldata->chars)
5732 p.x = (dir == -1 ? q - ldata->chars : term->cols - 1);
5737 * In this mode, the units are maximal runs of characters
5738 * whose `wordness' has the same value.
5740 wvalue = wordtype(term, UCSGET(ldata->chars, p.x));
5743 int maxcols = (ldata->lattr & LATTR_WRAPPED2 ?
5744 term->cols-1 : term->cols);
5745 if (p.x < maxcols-1) {
5746 if (wordtype(term, UCSGET(ldata->chars, p.x+1)) == wvalue)
5751 if (p.y+1 < term->rows &&
5752 (ldata->lattr & LATTR_WRAPPED)) {
5754 ldata2 = lineptr(p.y+1);
5755 if (wordtype(term, UCSGET(ldata2->chars, 0))
5772 if (wordtype(term, UCSGET(ldata->chars, p.x-1)) == wvalue)
5781 ldata2 = lineptr(p.y-1);
5782 maxcols = (ldata2->lattr & LATTR_WRAPPED2 ?
5783 term->cols-1 : term->cols);
5784 if (ldata2->lattr & LATTR_WRAPPED) {
5785 if (wordtype(term, UCSGET(ldata2->chars, maxcols-1))
5803 * In this mode, every line is a unit.
5805 p.x = (dir == -1 ? 0 : term->cols - 1);
5813 static void sel_spread(Terminal *term)
5815 if (term->seltype == LEXICOGRAPHIC) {
5816 term->selstart = sel_spread_half(term, term->selstart, -1);
5817 decpos(term->selend);
5818 term->selend = sel_spread_half(term, term->selend, +1);
5819 incpos(term->selend);
5823 static void term_paste_callback(void *vterm)
5825 Terminal *term = (Terminal *)vterm;
5827 if (term->paste_len == 0)
5830 while (term->paste_pos < term->paste_len) {
5832 while (n + term->paste_pos < term->paste_len) {
5833 if (term->paste_buffer[term->paste_pos + n++] == '\015')
5837 luni_send(term->ldisc, term->paste_buffer + term->paste_pos, n, 0);
5838 term->paste_pos += n;
5840 if (term->paste_pos < term->paste_len) {
5841 queue_toplevel_callback(term_paste_callback, term);
5845 sfree(term->paste_buffer);
5846 term->paste_buffer = NULL;
5847 term->paste_len = 0;
5850 void term_do_paste(Terminal *term)
5855 get_clip(term->frontend, &data, &len);
5856 if (data && len > 0) {
5859 term_seen_key_event(term); /* pasted data counts */
5861 if (term->paste_buffer)
5862 sfree(term->paste_buffer);
5863 term->paste_pos = term->paste_len = 0;
5864 term->paste_buffer = snewn(len + 12, wchar_t);
5866 if (term->bracketed_paste) {
5867 memcpy(term->paste_buffer, L"\033[200~", 6 * sizeof(wchar_t));
5868 term->paste_len += 6;
5872 while (p < data + len) {
5873 while (p < data + len &&
5874 !(p <= data + len - sel_nl_sz &&
5875 !memcmp(p, sel_nl, sizeof(sel_nl))))
5880 for (i = 0; i < p - q; i++) {
5881 term->paste_buffer[term->paste_len++] = q[i];
5885 if (p <= data + len - sel_nl_sz &&
5886 !memcmp(p, sel_nl, sizeof(sel_nl))) {
5887 term->paste_buffer[term->paste_len++] = '\015';
5893 if (term->bracketed_paste) {
5894 memcpy(term->paste_buffer + term->paste_len,
5895 L"\033[201~", 6 * sizeof(wchar_t));
5896 term->paste_len += 6;
5899 /* Assume a small paste will be OK in one go. */
5900 if (term->paste_len < 256) {
5902 luni_send(term->ldisc, term->paste_buffer, term->paste_len, 0);
5903 if (term->paste_buffer)
5904 sfree(term->paste_buffer);
5905 term->paste_buffer = 0;
5906 term->paste_pos = term->paste_len = 0;
5909 get_clip(term->frontend, NULL, NULL);
5911 queue_toplevel_callback(term_paste_callback, term);
5914 void term_mouse(Terminal *term, Mouse_Button braw, Mouse_Button bcooked,
5915 Mouse_Action a, int x, int y, int shift, int ctrl, int alt)
5919 int raw_mouse = (term->xterm_mouse &&
5920 !term->no_mouse_rep &&
5921 !(term->mouse_override && shift));
5922 int default_seltype;
5926 if (a == MA_DRAG && !raw_mouse)
5927 term_scroll(term, 0, -1);
5929 if (y >= term->rows) {
5931 if (a == MA_DRAG && !raw_mouse)
5932 term_scroll(term, 0, +1);
5941 if (x >= term->cols)
5944 selpoint.y = y + term->disptop;
5945 ldata = lineptr(selpoint.y);
5947 if ((ldata->lattr & LATTR_MODE) != LATTR_NORM)
5951 * Transform x through the bidi algorithm to find the _logical_
5952 * click point from the physical one.
5954 if (term_bidi_line(term, ldata, y) != NULL) {
5955 x = term->post_bidi_cache[y].backward[x];
5962 * If we're in the middle of a selection operation, we ignore raw
5963 * mouse mode until it's done (we must have been not in raw mouse
5964 * mode when it started).
5965 * This makes use of Shift for selection reliable, and avoids the
5966 * host seeing mouse releases for which they never saw corresponding
5970 (term->selstate != ABOUT_TO) && (term->selstate != DRAGGING)) {
5971 int encstate = 0, r, c, wheel;
5979 encstate = 0x00; /* left button down */
5994 case MBT_WHEEL_DOWN:
6002 /* For mouse wheel buttons, we only ever expect to see
6003 * MA_CLICK actions, and we don't try to keep track of
6004 * the buttons being 'pressed' (since without matching
6005 * click/release pairs that's pointless). */
6010 if (term->xterm_mouse == 1)
6015 /* If multiple extensions are enabled, the xterm 1006 is used, so it's okay to check for only that */
6016 if (!term->xterm_extended_mouse)
6018 term->mouse_is_down = 0;
6021 if (term->mouse_is_down == braw)
6023 term->mouse_is_down = braw;
6035 /* Check the extensions in decreasing order of preference. Encoding the release event above assumes that 1006 comes first. */
6036 if (term->xterm_extended_mouse) {
6037 len = sprintf(abuf, "\033[<%d;%d;%d%c", encstate, c, r, a == MA_RELEASE ? 'm' : 'M');
6038 } else if (term->urxvt_extended_mouse) {
6039 len = sprintf(abuf, "\033[%d;%d;%dM", encstate + 32, c, r);
6040 } else if (c <= 223 && r <= 223) {
6041 len = sprintf(abuf, "\033[M%c%c%c", encstate + 32, c + 32, r + 32);
6043 ldisc_send(term->ldisc, abuf, len, 0);
6049 * Set the selection type (rectangular or normal) at the start
6050 * of a selection attempt, from the state of Alt.
6052 if (!alt ^ !term->rect_select)
6053 default_seltype = RECTANGULAR;
6055 default_seltype = LEXICOGRAPHIC;
6057 if (term->selstate == NO_SELECTION) {
6058 term->seltype = default_seltype;
6061 if (bcooked == MBT_SELECT && a == MA_CLICK) {
6063 term->selstate = ABOUT_TO;
6064 term->seltype = default_seltype;
6065 term->selanchor = selpoint;
6066 term->selmode = SM_CHAR;
6067 } else if (bcooked == MBT_SELECT && (a == MA_2CLK || a == MA_3CLK)) {
6069 term->selmode = (a == MA_2CLK ? SM_WORD : SM_LINE);
6070 term->selstate = DRAGGING;
6071 term->selstart = term->selanchor = selpoint;
6072 term->selend = term->selstart;
6073 incpos(term->selend);
6075 } else if ((bcooked == MBT_SELECT && a == MA_DRAG) ||
6076 (bcooked == MBT_EXTEND && a != MA_RELEASE)) {
6077 if (term->selstate == ABOUT_TO && poseq(term->selanchor, selpoint))
6079 if (bcooked == MBT_EXTEND && a != MA_DRAG &&
6080 term->selstate == SELECTED) {
6081 if (term->seltype == LEXICOGRAPHIC) {
6083 * For normal selection, we extend by moving
6084 * whichever end of the current selection is closer
6087 if (posdiff(selpoint, term->selstart) <
6088 posdiff(term->selend, term->selstart) / 2) {
6089 term->selanchor = term->selend;
6090 decpos(term->selanchor);
6092 term->selanchor = term->selstart;
6096 * For rectangular selection, we have a choice of
6097 * _four_ places to put selanchor and selpoint: the
6098 * four corners of the selection.
6100 if (2*selpoint.x < term->selstart.x + term->selend.x)
6101 term->selanchor.x = term->selend.x-1;
6103 term->selanchor.x = term->selstart.x;
6105 if (2*selpoint.y < term->selstart.y + term->selend.y)
6106 term->selanchor.y = term->selend.y;
6108 term->selanchor.y = term->selstart.y;
6110 term->selstate = DRAGGING;
6112 if (term->selstate != ABOUT_TO && term->selstate != DRAGGING)
6113 term->selanchor = selpoint;
6114 term->selstate = DRAGGING;
6115 if (term->seltype == LEXICOGRAPHIC) {
6117 * For normal selection, we set (selstart,selend) to
6118 * (selpoint,selanchor) in some order.
6120 if (poslt(selpoint, term->selanchor)) {
6121 term->selstart = selpoint;
6122 term->selend = term->selanchor;
6123 incpos(term->selend);
6125 term->selstart = term->selanchor;
6126 term->selend = selpoint;
6127 incpos(term->selend);
6131 * For rectangular selection, we may need to
6132 * interchange x and y coordinates (if the user has
6133 * dragged in the -x and +y directions, or vice versa).
6135 term->selstart.x = min(term->selanchor.x, selpoint.x);
6136 term->selend.x = 1+max(term->selanchor.x, selpoint.x);
6137 term->selstart.y = min(term->selanchor.y, selpoint.y);
6138 term->selend.y = max(term->selanchor.y, selpoint.y);
6141 } else if ((bcooked == MBT_SELECT || bcooked == MBT_EXTEND) &&
6143 if (term->selstate == DRAGGING) {
6145 * We've completed a selection. We now transfer the
6146 * data to the clipboard.
6148 clipme(term, term->selstart, term->selend,
6149 (term->seltype == RECTANGULAR), FALSE);
6150 term->selstate = SELECTED;
6152 term->selstate = NO_SELECTION;
6153 } else if (bcooked == MBT_PASTE
6155 #if MULTICLICK_ONLY_EVENT
6156 || a == MA_2CLK || a == MA_3CLK
6159 request_paste(term->frontend);
6163 * Since terminal output is suppressed during drag-selects, we
6164 * should make sure to write any pending output if one has just
6167 if (term->selstate != DRAGGING)
6172 int format_arrow_key(char *buf, Terminal *term, int xkey, int ctrl)
6176 if (term->vt52_mode)
6177 p += sprintf((char *) p, "\x1B%c", xkey);
6179 int app_flg = (term->app_cursor_keys && !term->no_applic_c);
6182 * RDB: VT100 & VT102 manuals both state the app cursor
6183 * keys only work if the app keypad is on.
6185 * SGT: That may well be true, but xterm disagrees and so
6186 * does at least one application, so I've #if'ed this out
6187 * and the behaviour is back to PuTTY's original: app
6188 * cursor and app keypad are independently switchable
6189 * modes. If anyone complains about _this_ I'll have to
6190 * put in a configurable option.
6192 if (!term->app_keypad_keys)
6195 /* Useful mapping of Ctrl-arrows */
6200 p += sprintf((char *) p, "\x1BO%c", xkey);
6202 p += sprintf((char *) p, "\x1B[%c", xkey);
6208 void term_nopaste(Terminal *term)
6210 if (term->paste_len == 0)
6212 sfree(term->paste_buffer);
6213 term->paste_buffer = NULL;
6214 term->paste_len = 0;
6217 static void deselect(Terminal *term)
6219 term->selstate = NO_SELECTION;
6220 term->selstart.x = term->selstart.y = term->selend.x = term->selend.y = 0;
6223 void term_deselect(Terminal *term)
6229 * Since terminal output is suppressed during drag-selects, we
6230 * should make sure to write any pending output if one has just
6233 if (term->selstate != DRAGGING)
6237 int term_ldisc(Terminal *term, int option)
6239 if (option == LD_ECHO)
6240 return term->term_echoing;
6241 if (option == LD_EDIT)
6242 return term->term_editing;
6246 int term_data(Terminal *term, int is_stderr, const char *data, int len)
6248 bufchain_add(&term->inbuf, data, len);
6250 if (!term->in_term_out) {
6251 term->in_term_out = TRUE;
6252 term_reset_cblink(term);
6254 * During drag-selects, we do not process terminal input,
6255 * because the user will want the screen to hold still to
6258 if (term->selstate != DRAGGING)
6260 term->in_term_out = FALSE;
6264 * term_out() always completely empties inbuf. Therefore,
6265 * there's no reason at all to return anything other than zero
6266 * from this function, because there _can't_ be a question of
6267 * the remote side needing to wait until term_out() has cleared
6270 * This is a slightly suboptimal way to deal with SSH-2 - in
6271 * principle, the window mechanism would allow us to continue
6272 * to accept data on forwarded ports and X connections even
6273 * while the terminal processing was going slowly - but we
6274 * can't do the 100% right thing without moving the terminal
6275 * processing into a separate thread, and that might hurt
6276 * portability. So we manage stdout buffering the old SSH-1 way:
6277 * if the terminal processing goes slowly, the whole SSH
6278 * connection stops accepting data until it's ready.
6280 * In practice, I can't imagine this causing serious trouble.
6286 * Write untrusted data to the terminal.
6287 * The only control character that should be honoured is \n (which
6288 * will behave as a CRLF).
6290 int term_data_untrusted(Terminal *term, const char *data, int len)
6293 /* FIXME: more sophisticated checking? */
6294 for (i = 0; i < len; i++) {
6295 if (data[i] == '\n')
6296 term_data(term, 1, "\r\n", 2);
6297 else if (data[i] & 0x60)
6298 term_data(term, 1, data + i, 1);
6300 return 0; /* assumes that term_data() always returns 0 */
6303 void term_provide_logctx(Terminal *term, void *logctx)
6305 term->logctx = logctx;
6308 void term_set_focus(Terminal *term, int has_focus)
6310 term->has_focus = has_focus;
6311 term_schedule_cblink(term);
6315 * Provide "auto" settings for remote tty modes, suitable for an
6316 * application with a terminal window.
6318 char *term_get_ttymode(Terminal *term, const char *mode)
6321 if (strcmp(mode, "ERASE") == 0) {
6322 val = term->bksp_is_delete ? "^?" : "^H";
6324 /* FIXME: perhaps we should set ONLCR based on lfhascr as well? */
6325 /* FIXME: or ECHO and friends based on local echo state? */
6329 struct term_userpass_state {
6331 int done_prompt; /* printed out prompt yet? */
6332 size_t pos; /* cursor position */
6336 * Process some terminal data in the course of username/password
6339 int term_get_userpass_input(Terminal *term, prompts_t *p,
6340 unsigned char *in, int inlen)
6342 struct term_userpass_state *s = (struct term_userpass_state *)p->data;
6345 * First call. Set some stuff up.
6347 p->data = s = snew(struct term_userpass_state);
6350 /* We only print the `name' caption if we have to... */
6351 if (p->name_reqd && p->name) {
6352 size_t l = strlen(p->name);
6353 term_data_untrusted(term, p->name, l);
6354 if (p->name[l-1] != '\n')
6355 term_data_untrusted(term, "\n", 1);
6357 /* ...but we always print any `instruction'. */
6358 if (p->instruction) {
6359 size_t l = strlen(p->instruction);
6360 term_data_untrusted(term, p->instruction, l);
6361 if (p->instruction[l-1] != '\n')
6362 term_data_untrusted(term, "\n", 1);
6365 * Zero all the results, in case we abort half-way through.
6369 for (i = 0; i < (int)p->n_prompts; i++)
6370 prompt_set_result(p->prompts[i], "");
6374 while (s->curr_prompt < p->n_prompts) {
6376 prompt_t *pr = p->prompts[s->curr_prompt];
6377 int finished_prompt = 0;
6379 if (!s->done_prompt) {
6380 term_data_untrusted(term, pr->prompt, strlen(pr->prompt));
6385 /* Breaking out here ensures that the prompt is printed even
6386 * if we're now waiting for user data. */
6387 if (!in || !inlen) break;
6389 /* FIXME: should we be using local-line-editing code instead? */
6390 while (!finished_prompt && inlen) {
6396 term_data(term, 0, "\r\n", 2);
6397 prompt_ensure_result_size(pr, s->pos + 1);
6398 pr->result[s->pos] = '\0';
6399 /* go to next prompt, if any */
6402 finished_prompt = 1; /* break out */
6408 term_data(term, 0, "\b \b", 3);
6414 while (s->pos > 0) {
6416 term_data(term, 0, "\b \b", 3);
6422 /* Immediate abort. */
6423 term_data(term, 0, "\r\n", 2);
6426 return 0; /* user abort */
6429 * This simplistic check for printability is disabled
6430 * when we're doing password input, because some people
6431 * have control characters in their passwords.
6433 if (!pr->echo || (c >= ' ' && c <= '~') ||
6434 ((unsigned char) c >= 160)) {
6435 prompt_ensure_result_size(pr, s->pos + 1);
6436 pr->result[s->pos++] = c;
6438 term_data(term, 0, &c, 1);
6446 if (s->curr_prompt < p->n_prompts) {
6447 return -1; /* more data required */
6451 return +1; /* all done */