/* * Terminal emulator. */ #include #include #include #include #include #include #include "putty.h" #include "terminal.h" #define poslt(p1,p2) ( (p1).y < (p2).y || ( (p1).y == (p2).y && (p1).x < (p2).x ) ) #define posle(p1,p2) ( (p1).y < (p2).y || ( (p1).y == (p2).y && (p1).x <= (p2).x ) ) #define poseq(p1,p2) ( (p1).y == (p2).y && (p1).x == (p2).x ) #define posdiff(p1,p2) ( ((p1).y - (p2).y) * (term->cols+1) + (p1).x - (p2).x ) /* Product-order comparisons for rectangular block selection. */ #define posPlt(p1,p2) ( (p1).y <= (p2).y && (p1).x < (p2).x ) #define posPle(p1,p2) ( (p1).y <= (p2).y && (p1).x <= (p2).x ) #define incpos(p) ( (p).x == term->cols ? ((p).x = 0, (p).y++, 1) : ((p).x++, 0) ) #define decpos(p) ( (p).x == 0 ? ((p).x = term->cols, (p).y--, 1) : ((p).x--, 0) ) #define VT52_PLUS #define CL_ANSIMIN 0x0001 /* Codes in all ANSI like terminals. */ #define CL_VT100 0x0002 /* VT100 */ #define CL_VT100AVO 0x0004 /* VT100 +AVO; 132x24 (not 132x14) & attrs */ #define CL_VT102 0x0008 /* VT102 */ #define CL_VT220 0x0010 /* VT220 */ #define CL_VT320 0x0020 /* VT320 */ #define CL_VT420 0x0040 /* VT420 */ #define CL_VT510 0x0080 /* VT510, NB VT510 includes ANSI */ #define CL_VT340TEXT 0x0100 /* VT340 extensions that appear in the VT420 */ #define CL_SCOANSI 0x1000 /* SCOANSI not in ANSIMIN. */ #define CL_ANSI 0x2000 /* ANSI ECMA-48 not in the VT100..VT420 */ #define CL_OTHER 0x4000 /* Others, Xterm, linux, putty, dunno, etc */ #define TM_VT100 (CL_ANSIMIN|CL_VT100) #define TM_VT100AVO (TM_VT100|CL_VT100AVO) #define TM_VT102 (TM_VT100AVO|CL_VT102) #define TM_VT220 (TM_VT102|CL_VT220) #define TM_VTXXX (TM_VT220|CL_VT340TEXT|CL_VT510|CL_VT420|CL_VT320) #define TM_SCOANSI (CL_ANSIMIN|CL_SCOANSI) #define TM_PUTTY (0xFFFF) #define UPDATE_DELAY ((TICKSPERSEC+49)/50)/* ticks to defer window update */ #define TBLINK_DELAY ((TICKSPERSEC*9+19)/20)/* ticks between text blinks*/ #define CBLINK_DELAY (CURSORBLINK) /* ticks between cursor blinks */ #define VBELL_DELAY (VBELL_TIMEOUT) /* visual bell timeout in ticks */ #define compatibility(x) \ if ( ((CL_##x)&term->compatibility_level) == 0 ) { \ term->termstate=TOPLEVEL; \ break; \ } #define compatibility2(x,y) \ if ( ((CL_##x|CL_##y)&term->compatibility_level) == 0 ) { \ term->termstate=TOPLEVEL; \ break; \ } #define has_compat(x) ( ((CL_##x)&term->compatibility_level) != 0 ) const char *EMPTY_WINDOW_TITLE = ""; const char sco2ansicolour[] = { 0, 4, 2, 6, 1, 5, 3, 7 }; #define sel_nl_sz (sizeof(sel_nl)/sizeof(wchar_t)) const wchar_t sel_nl[] = SEL_NL; /* * Fetch the character at a particular position in a line array, * for purposes of `wordtype'. The reason this isn't just a simple * array reference is that if the character we find is UCSWIDE, * then we must look one space further to the left. */ #define UCSGET(a, x) \ ( (x)>0 && (a)[(x)].chr == UCSWIDE ? (a)[(x)-1].chr : (a)[(x)].chr ) /* * Detect the various aliases of U+0020 SPACE. */ #define IS_SPACE_CHR(chr) \ ((chr) == 0x20 || (DIRECT_CHAR(chr) && ((chr) & 0xFF) == 0x20)) /* * Spot magic CSETs. */ #define CSET_OF(chr) (DIRECT_CHAR(chr)||DIRECT_FONT(chr) ? (chr)&CSET_MASK : 0) /* * Internal prototypes. */ static void resizeline(Terminal *, termline *, int); static termline *lineptr(Terminal *, int, int, int); static void unlineptr(termline *); static void check_line_size(Terminal *, termline *); static void do_paint(Terminal *, Context, int); static void erase_lots(Terminal *, int, int, int); static int find_last_nonempty_line(Terminal *, tree234 *); static void swap_screen(Terminal *, int, int, int); static void update_sbar(Terminal *); static void deselect(Terminal *); static void term_print_finish(Terminal *); static void scroll(Terminal *, int, int, int, int); static void parse_optionalrgb(optionalrgb *out, unsigned *values); #ifdef OPTIMISE_SCROLL static void scroll_display(Terminal *, int, int, int); #endif /* OPTIMISE_SCROLL */ static termline *newline(Terminal *term, int cols, int bce) { termline *line; int j; line = snew(termline); line->chars = snewn(cols, termchar); for (j = 0; j < cols; j++) line->chars[j] = (bce ? term->erase_char : term->basic_erase_char); line->cols = line->size = cols; line->lattr = LATTR_NORM; line->temporary = FALSE; line->cc_free = 0; return line; } static void freeline(termline *line) { if (line) { sfree(line->chars); sfree(line); } } static void unlineptr(termline *line) { if (line->temporary) freeline(line); } #ifdef TERM_CC_DIAGS /* * Diagnostic function: verify that a termline has a correct * combining character structure. * * This is a performance-intensive check, so it's no longer enabled * by default. */ static void cc_check(termline *line) { unsigned char *flags; int i, j; assert(line->size >= line->cols); flags = snewn(line->size, unsigned char); for (i = 0; i < line->size; i++) flags[i] = (i < line->cols); for (i = 0; i < line->cols; i++) { j = i; while (line->chars[j].cc_next) { j += line->chars[j].cc_next; assert(j >= line->cols && j < line->size); assert(!flags[j]); flags[j] = TRUE; } } j = line->cc_free; if (j) { while (1) { assert(j >= line->cols && j < line->size); assert(!flags[j]); flags[j] = TRUE; if (line->chars[j].cc_next) j += line->chars[j].cc_next; else break; } } j = 0; for (i = 0; i < line->size; i++) j += (flags[i] != 0); assert(j == line->size); sfree(flags); } #endif /* * Add a combining character to a character cell. */ static void add_cc(termline *line, int col, unsigned long chr) { int newcc; assert(col >= 0 && col < line->cols); /* * Start by extending the cols array if the free list is empty. */ if (!line->cc_free) { int n = line->size; line->size += 16 + (line->size - line->cols) / 2; line->chars = sresize(line->chars, line->size, termchar); line->cc_free = n; while (n < line->size) { if (n+1 < line->size) line->chars[n].cc_next = 1; else line->chars[n].cc_next = 0; n++; } } /* * Now walk the cc list of the cell in question. */ while (line->chars[col].cc_next) col += line->chars[col].cc_next; /* * `col' now points at the last cc currently in this cell; so * we simply add another one. */ newcc = line->cc_free; if (line->chars[newcc].cc_next) line->cc_free = newcc + line->chars[newcc].cc_next; else line->cc_free = 0; line->chars[newcc].cc_next = 0; line->chars[newcc].chr = chr; line->chars[col].cc_next = newcc - col; #ifdef TERM_CC_DIAGS cc_check(line); #endif } /* * Clear the combining character list in a character cell. */ static void clear_cc(termline *line, int col) { int oldfree, origcol = col; assert(col >= 0 && col < line->cols); if (!line->chars[col].cc_next) return; /* nothing needs doing */ oldfree = line->cc_free; line->cc_free = col + line->chars[col].cc_next; while (line->chars[col].cc_next) col += line->chars[col].cc_next; if (oldfree) line->chars[col].cc_next = oldfree - col; else line->chars[col].cc_next = 0; line->chars[origcol].cc_next = 0; #ifdef TERM_CC_DIAGS cc_check(line); #endif } /* * Compare two character cells for equality. Special case required * in do_paint() where we override what we expect the chr and attr * fields to be. */ static int termchars_equal_override(termchar *a, termchar *b, unsigned long bchr, unsigned long battr) { /* FULL-TERMCHAR */ if (!truecolour_equal(a->truecolour, b->truecolour)) return FALSE; if (a->chr != bchr) return FALSE; if ((a->attr &~ DATTR_MASK) != (battr &~ DATTR_MASK)) return FALSE; while (a->cc_next || b->cc_next) { if (!a->cc_next || !b->cc_next) return FALSE; /* one cc-list ends, other does not */ a += a->cc_next; b += b->cc_next; if (a->chr != b->chr) return FALSE; } return TRUE; } static int termchars_equal(termchar *a, termchar *b) { return termchars_equal_override(a, b, b->chr, b->attr); } /* * Copy a character cell. (Requires a pointer to the destination * termline, so as to access its free list.) */ static void copy_termchar(termline *destline, int x, termchar *src) { clear_cc(destline, x); destline->chars[x] = *src; /* copy everything except cc-list */ destline->chars[x].cc_next = 0; /* and make sure this is zero */ while (src->cc_next) { src += src->cc_next; add_cc(destline, x, src->chr); } #ifdef TERM_CC_DIAGS cc_check(destline); #endif } /* * Move a character cell within its termline. */ static void move_termchar(termline *line, termchar *dest, termchar *src) { /* First clear the cc list from the original char, just in case. */ clear_cc(line, dest - line->chars); /* Move the character cell and adjust its cc_next. */ *dest = *src; /* copy everything except cc-list */ if (src->cc_next) dest->cc_next = src->cc_next - (dest-src); /* Ensure the original cell doesn't have a cc list. */ src->cc_next = 0; #ifdef TERM_CC_DIAGS cc_check(line); #endif } /* * Compress and decompress a termline into an RLE-based format for * storing in scrollback. (Since scrollback almost never needs to * be modified and exists in huge quantities, this is a sensible * tradeoff, particularly since it allows us to continue adding * features to the main termchar structure without proportionally * bloating the terminal emulator's memory footprint unless those * features are in constant use.) */ struct buf { unsigned char *data; int len, size; }; static void add(struct buf *b, unsigned char c) { if (b->len >= b->size) { b->size = (b->len * 3 / 2) + 512; b->data = sresize(b->data, b->size, unsigned char); } b->data[b->len++] = c; } static int get(struct buf *b) { return b->data[b->len++]; } static void makerle(struct buf *b, termline *ldata, void (*makeliteral)(struct buf *b, termchar *c, unsigned long *state)) { int hdrpos, hdrsize, n, prevlen, prevpos, thislen, thispos, prev2; termchar *c = ldata->chars; unsigned long state = 0, oldstate; n = ldata->cols; hdrpos = b->len; hdrsize = 0; add(b, 0); prevlen = prevpos = 0; prev2 = FALSE; while (n-- > 0) { thispos = b->len; makeliteral(b, c++, &state); thislen = b->len - thispos; if (thislen == prevlen && !memcmp(b->data + prevpos, b->data + thispos, thislen)) { /* * This literal precisely matches the previous one. * Turn it into a run if it's worthwhile. * * With one-byte literals, it costs us two bytes to * encode a run, plus another byte to write the header * to resume normal output; so a three-element run is * neutral, and anything beyond that is unconditionally * worthwhile. With two-byte literals or more, even a * 2-run is a win. */ if (thislen > 1 || prev2) { int runpos, runlen; /* * It's worth encoding a run. Start at prevpos, * unless hdrsize==0 in which case we can back up * another one and start by overwriting hdrpos. */ hdrsize--; /* remove the literal at prevpos */ if (prev2) { assert(hdrsize > 0); hdrsize--; prevpos -= prevlen;/* and possibly another one */ } if (hdrsize == 0) { assert(prevpos == hdrpos + 1); runpos = hdrpos; b->len = prevpos+prevlen; } else { memmove(b->data + prevpos+1, b->data + prevpos, prevlen); runpos = prevpos; b->len = prevpos+prevlen+1; /* * Terminate the previous run of ordinary * literals. */ assert(hdrsize >= 1 && hdrsize <= 128); b->data[hdrpos] = hdrsize - 1; } runlen = prev2 ? 3 : 2; while (n > 0 && runlen < 129) { int tmppos, tmplen; tmppos = b->len; oldstate = state; makeliteral(b, c, &state); tmplen = b->len - tmppos; b->len = tmppos; if (tmplen != thislen || memcmp(b->data + runpos+1, b->data + tmppos, tmplen)) { state = oldstate; break; /* run over */ } n--, c++, runlen++; } assert(runlen >= 2 && runlen <= 129); b->data[runpos] = runlen + 0x80 - 2; hdrpos = b->len; hdrsize = 0; add(b, 0); /* And ensure this run doesn't interfere with the next. */ prevlen = prevpos = 0; prev2 = FALSE; continue; } else { /* * Just flag that the previous two literals were * identical, in case we find a third identical one * we want to turn into a run. */ prev2 = TRUE; prevlen = thislen; prevpos = thispos; } } else { prev2 = FALSE; prevlen = thislen; prevpos = thispos; } /* * This character isn't (yet) part of a run. Add it to * hdrsize. */ hdrsize++; if (hdrsize == 128) { b->data[hdrpos] = hdrsize - 1; hdrpos = b->len; hdrsize = 0; add(b, 0); prevlen = prevpos = 0; prev2 = FALSE; } } /* * Clean up. */ if (hdrsize > 0) { assert(hdrsize <= 128); b->data[hdrpos] = hdrsize - 1; } else { b->len = hdrpos; } } static void makeliteral_chr(struct buf *b, termchar *c, unsigned long *state) { /* * My encoding for characters is UTF-8-like, in that it stores * 7-bit ASCII in one byte and uses high-bit-set bytes as * introducers to indicate a longer sequence. However, it's * unlike UTF-8 in that it doesn't need to be able to * resynchronise, and therefore I don't want to waste two bits * per byte on having recognisable continuation characters. * Also I don't want to rule out the possibility that I may one * day use values 0x80000000-0xFFFFFFFF for interesting * purposes, so unlike UTF-8 I need a full 32-bit range. * Accordingly, here is my encoding: * * 00000000-0000007F: 0xxxxxxx (but see below) * 00000080-00003FFF: 10xxxxxx xxxxxxxx * 00004000-001FFFFF: 110xxxxx xxxxxxxx xxxxxxxx * 00200000-0FFFFFFF: 1110xxxx xxxxxxxx xxxxxxxx xxxxxxxx * 10000000-FFFFFFFF: 11110ZZZ xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx * * (`Z' is like `x' but is always going to be zero since the * values I'm encoding don't go above 2^32. In principle the * five-byte form of the encoding could extend to 2^35, and * there could be six-, seven-, eight- and nine-byte forms as * well to allow up to 64-bit values to be encoded. But that's * completely unnecessary for these purposes!) * * The encoding as written above would be very simple, except * that 7-bit ASCII can occur in several different ways in the * terminal data; sometimes it crops up in the D800 page * (CSET_ASCII) but at other times it's in the 0000 page (real * Unicode). Therefore, this encoding is actually _stateful_: * the one-byte encoding of 00-7F actually indicates `reuse the * upper three bytes of the last character', and to encode an * absolute value of 00-7F you need to use the two-byte form * instead. */ if ((c->chr & ~0x7F) == *state) { add(b, (unsigned char)(c->chr & 0x7F)); } else if (c->chr < 0x4000) { add(b, (unsigned char)(((c->chr >> 8) & 0x3F) | 0x80)); add(b, (unsigned char)(c->chr & 0xFF)); } else if (c->chr < 0x200000) { add(b, (unsigned char)(((c->chr >> 16) & 0x1F) | 0xC0)); add(b, (unsigned char)((c->chr >> 8) & 0xFF)); add(b, (unsigned char)(c->chr & 0xFF)); } else if (c->chr < 0x10000000) { add(b, (unsigned char)(((c->chr >> 24) & 0x0F) | 0xE0)); add(b, (unsigned char)((c->chr >> 16) & 0xFF)); add(b, (unsigned char)((c->chr >> 8) & 0xFF)); add(b, (unsigned char)(c->chr & 0xFF)); } else { add(b, 0xF0); add(b, (unsigned char)((c->chr >> 24) & 0xFF)); add(b, (unsigned char)((c->chr >> 16) & 0xFF)); add(b, (unsigned char)((c->chr >> 8) & 0xFF)); add(b, (unsigned char)(c->chr & 0xFF)); } *state = c->chr & ~0xFF; } static void makeliteral_attr(struct buf *b, termchar *c, unsigned long *state) { /* * My encoding for attributes is 16-bit-granular and assumes * that the top bit of the word is never required. I either * store a two-byte value with the top bit clear (indicating * just that value), or a four-byte value with the top bit set * (indicating the same value with its top bit clear). * * However, first I permute the bits of the attribute value, so * that the eight bits of colour (four in each of fg and bg) * which are never non-zero unless xterm 256-colour mode is in * use are placed higher up the word than everything else. This * ensures that attribute values remain 16-bit _unless_ the * user uses extended colour. */ unsigned attr, colourbits; attr = c->attr; assert(ATTR_BGSHIFT > ATTR_FGSHIFT); colourbits = (attr >> (ATTR_BGSHIFT + 4)) & 0xF; colourbits <<= 4; colourbits |= (attr >> (ATTR_FGSHIFT + 4)) & 0xF; attr = (((attr >> (ATTR_BGSHIFT + 8)) << (ATTR_BGSHIFT + 4)) | (attr & ((1 << (ATTR_BGSHIFT + 4))-1))); attr = (((attr >> (ATTR_FGSHIFT + 8)) << (ATTR_FGSHIFT + 4)) | (attr & ((1 << (ATTR_FGSHIFT + 4))-1))); attr |= (colourbits << (32-9)); if (attr < 0x8000) { add(b, (unsigned char)((attr >> 8) & 0xFF)); add(b, (unsigned char)(attr & 0xFF)); } else { add(b, (unsigned char)(((attr >> 24) & 0x7F) | 0x80)); add(b, (unsigned char)((attr >> 16) & 0xFF)); add(b, (unsigned char)((attr >> 8) & 0xFF)); add(b, (unsigned char)(attr & 0xFF)); } } static void makeliteral_truecolour(struct buf *b, termchar *c, unsigned long *state) { /* * Put the used parts of the colour info into the buffer. */ add(b, ((c->truecolour.fg.enabled ? 1 : 0) | (c->truecolour.bg.enabled ? 2 : 0))); if (c->truecolour.fg.enabled) { add(b, c->truecolour.fg.r); add(b, c->truecolour.fg.g); add(b, c->truecolour.fg.b); } if (c->truecolour.bg.enabled) { add(b, c->truecolour.bg.r); add(b, c->truecolour.bg.g); add(b, c->truecolour.bg.b); } } static void makeliteral_cc(struct buf *b, termchar *c, unsigned long *state) { /* * For combining characters, I just encode a bunch of ordinary * chars using makeliteral_chr, and terminate with a \0 * character (which I know won't come up as a combining char * itself). * * I don't use the stateful encoding in makeliteral_chr. */ unsigned long zstate; termchar z; while (c->cc_next) { c += c->cc_next; assert(c->chr != 0); zstate = 0; makeliteral_chr(b, c, &zstate); } z.chr = 0; zstate = 0; makeliteral_chr(b, &z, &zstate); } static termline *decompressline(unsigned char *data, int *bytes_used); static unsigned char *compressline(termline *ldata) { struct buf buffer = { NULL, 0, 0 }, *b = &buffer; /* * First, store the column count, 7 bits at a time, least * significant `digit' first, with the high bit set on all but * the last. */ { int n = ldata->cols; while (n >= 128) { add(b, (unsigned char)((n & 0x7F) | 0x80)); n >>= 7; } add(b, (unsigned char)(n)); } /* * Next store the lattrs; same principle. */ { int n = ldata->lattr; while (n >= 128) { add(b, (unsigned char)((n & 0x7F) | 0x80)); n >>= 7; } add(b, (unsigned char)(n)); } /* * Now we store a sequence of separate run-length encoded * fragments, each containing exactly as many symbols as there * are columns in the ldata. * * All of these have a common basic format: * * - a byte 00-7F indicates that X+1 literals follow it * - a byte 80-FF indicates that a single literal follows it * and expects to be repeated (X-0x80)+2 times. * * The format of the `literals' varies between the fragments. */ makerle(b, ldata, makeliteral_chr); makerle(b, ldata, makeliteral_attr); makerle(b, ldata, makeliteral_truecolour); makerle(b, ldata, makeliteral_cc); /* * Diagnostics: ensure that the compressed data really does * decompress to the right thing. * * This is a bit performance-heavy for production code. */ #ifdef TERM_CC_DIAGS #ifndef CHECK_SB_COMPRESSION { int dused; termline *dcl; int i; #ifdef DIAGNOSTIC_SB_COMPRESSION for (i = 0; i < b->len; i++) { printf(" %02x ", b->data[i]); } printf("\n"); #endif dcl = decompressline(b->data, &dused); assert(b->len == dused); assert(ldata->cols == dcl->cols); assert(ldata->lattr == dcl->lattr); for (i = 0; i < ldata->cols; i++) assert(termchars_equal(&ldata->chars[i], &dcl->chars[i])); #ifdef DIAGNOSTIC_SB_COMPRESSION printf("%d cols (%d bytes) -> %d bytes (factor of %g)\n", ldata->cols, 4 * ldata->cols, dused, (double)dused / (4 * ldata->cols)); #endif freeline(dcl); } #endif #endif /* TERM_CC_DIAGS */ /* * Trim the allocated memory so we don't waste any, and return. */ return sresize(b->data, b->len, unsigned char); } static void readrle(struct buf *b, termline *ldata, void (*readliteral)(struct buf *b, termchar *c, termline *ldata, unsigned long *state)) { int n = 0; unsigned long state = 0; while (n < ldata->cols) { int hdr = get(b); if (hdr >= 0x80) { /* A run. */ int pos = b->len, count = hdr + 2 - 0x80; while (count--) { assert(n < ldata->cols); b->len = pos; readliteral(b, ldata->chars + n, ldata, &state); n++; } } else { /* Just a sequence of consecutive literals. */ int count = hdr + 1; while (count--) { assert(n < ldata->cols); readliteral(b, ldata->chars + n, ldata, &state); n++; } } } assert(n == ldata->cols); } static void readliteral_chr(struct buf *b, termchar *c, termline *ldata, unsigned long *state) { int byte; /* * 00000000-0000007F: 0xxxxxxx * 00000080-00003FFF: 10xxxxxx xxxxxxxx * 00004000-001FFFFF: 110xxxxx xxxxxxxx xxxxxxxx * 00200000-0FFFFFFF: 1110xxxx xxxxxxxx xxxxxxxx xxxxxxxx * 10000000-FFFFFFFF: 11110ZZZ xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx */ byte = get(b); if (byte < 0x80) { c->chr = byte | *state; } else if (byte < 0xC0) { c->chr = (byte &~ 0xC0) << 8; c->chr |= get(b); } else if (byte < 0xE0) { c->chr = (byte &~ 0xE0) << 16; c->chr |= get(b) << 8; c->chr |= get(b); } else if (byte < 0xF0) { c->chr = (byte &~ 0xF0) << 24; c->chr |= get(b) << 16; c->chr |= get(b) << 8; c->chr |= get(b); } else { assert(byte == 0xF0); c->chr = get(b) << 24; c->chr |= get(b) << 16; c->chr |= get(b) << 8; c->chr |= get(b); } *state = c->chr & ~0xFF; } static void readliteral_attr(struct buf *b, termchar *c, termline *ldata, unsigned long *state) { unsigned val, attr, colourbits; val = get(b) << 8; val |= get(b); if (val >= 0x8000) { val &= ~0x8000; val <<= 16; val |= get(b) << 8; val |= get(b); } colourbits = (val >> (32-9)) & 0xFF; attr = (val & ((1<<(32-9))-1)); attr = (((attr >> (ATTR_FGSHIFT + 4)) << (ATTR_FGSHIFT + 8)) | (attr & ((1 << (ATTR_FGSHIFT + 4))-1))); attr = (((attr >> (ATTR_BGSHIFT + 4)) << (ATTR_BGSHIFT + 8)) | (attr & ((1 << (ATTR_BGSHIFT + 4))-1))); attr |= (colourbits >> 4) << (ATTR_BGSHIFT + 4); attr |= (colourbits & 0xF) << (ATTR_FGSHIFT + 4); c->attr = attr; } static void readliteral_truecolour(struct buf *b, termchar *c, termline *ldata, unsigned long *state) { int flags = get(b); if (flags & 1) { c->truecolour.fg.enabled = TRUE; c->truecolour.fg.r = get(b); c->truecolour.fg.g = get(b); c->truecolour.fg.b = get(b); } else { c->truecolour.fg = optionalrgb_none; } if (flags & 2) { c->truecolour.bg.enabled = TRUE; c->truecolour.bg.r = get(b); c->truecolour.bg.g = get(b); c->truecolour.bg.b = get(b); } else { c->truecolour.bg = optionalrgb_none; } } static void readliteral_cc(struct buf *b, termchar *c, termline *ldata, unsigned long *state) { termchar n; unsigned long zstate; int x = c - ldata->chars; c->cc_next = 0; while (1) { zstate = 0; readliteral_chr(b, &n, ldata, &zstate); if (!n.chr) break; add_cc(ldata, x, n.chr); } } static termline *decompressline(unsigned char *data, int *bytes_used) { int ncols, byte, shift; struct buf buffer, *b = &buffer; termline *ldata; b->data = data; b->len = 0; /* * First read in the column count. */ ncols = shift = 0; do { byte = get(b); ncols |= (byte & 0x7F) << shift; shift += 7; } while (byte & 0x80); /* * Now create the output termline. */ ldata = snew(termline); ldata->chars = snewn(ncols, termchar); ldata->cols = ldata->size = ncols; ldata->temporary = TRUE; ldata->cc_free = 0; /* * We must set all the cc pointers in ldata->chars to 0 right * now, so that cc diagnostics that verify the integrity of the * whole line will make sense while we're in the middle of * building it up. */ { int i; for (i = 0; i < ldata->cols; i++) ldata->chars[i].cc_next = 0; } /* * Now read in the lattr. */ ldata->lattr = shift = 0; do { byte = get(b); ldata->lattr |= (byte & 0x7F) << shift; shift += 7; } while (byte & 0x80); /* * Now we read in each of the RLE streams in turn. */ readrle(b, ldata, readliteral_chr); readrle(b, ldata, readliteral_attr); readrle(b, ldata, readliteral_truecolour); readrle(b, ldata, readliteral_cc); /* Return the number of bytes read, for diagnostic purposes. */ if (bytes_used) *bytes_used = b->len; return ldata; } /* * Resize a line to make it `cols' columns wide. */ static void resizeline(Terminal *term, termline *line, int cols) { int i, oldcols; if (line->cols != cols) { oldcols = line->cols; /* * This line is the wrong length, which probably means it * hasn't been accessed since a resize. Resize it now. * * First, go through all the characters that will be thrown * out in the resize (if we're shrinking the line) and * return their cc lists to the cc free list. */ for (i = cols; i < oldcols; i++) clear_cc(line, i); /* * If we're shrinking the line, we now bodily move the * entire cc section from where it started to where it now * needs to be. (We have to do this before the resize, so * that the data we're copying is still there. However, if * we're expanding, we have to wait until _after_ the * resize so that the space we're copying into is there.) */ if (cols < oldcols) memmove(line->chars + cols, line->chars + oldcols, (line->size - line->cols) * TSIZE); /* * Now do the actual resize, leaving the _same_ amount of * cc space as there was to begin with. */ line->size += cols - oldcols; line->chars = sresize(line->chars, line->size, TTYPE); line->cols = cols; /* * If we're expanding the line, _now_ we move the cc * section. */ if (cols > oldcols) memmove(line->chars + cols, line->chars + oldcols, (line->size - line->cols) * TSIZE); /* * Go through what's left of the original line, and adjust * the first cc_next pointer in each list. (All the * subsequent ones are still valid because they are * relative offsets within the cc block.) Also do the same * to the head of the cc_free list. */ for (i = 0; i < oldcols && i < cols; i++) if (line->chars[i].cc_next) line->chars[i].cc_next += cols - oldcols; if (line->cc_free) line->cc_free += cols - oldcols; /* * And finally fill in the new space with erase chars. (We * don't have to worry about cc lists here, because we * _know_ the erase char doesn't have one.) */ for (i = oldcols; i < cols; i++) line->chars[i] = term->basic_erase_char; #ifdef TERM_CC_DIAGS cc_check(line); #endif } } /* * Get the number of lines in the scrollback. */ static int sblines(Terminal *term) { int sblines = count234(term->scrollback); if (term->erase_to_scrollback && term->alt_which && term->alt_screen) { sblines += term->alt_sblines; } return sblines; } /* * Retrieve a line of the screen or of the scrollback, according to * whether the y coordinate is non-negative or negative * (respectively). */ static termline *lineptr(Terminal *term, int y, int lineno, int screen) { termline *line; tree234 *whichtree; int treeindex; if (y >= 0) { whichtree = term->screen; treeindex = y; } else { int altlines = 0; assert(!screen); if (term->erase_to_scrollback && term->alt_which && term->alt_screen) { altlines = term->alt_sblines; } if (y < -altlines) { whichtree = term->scrollback; treeindex = y + altlines + count234(term->scrollback); } else { whichtree = term->alt_screen; treeindex = y + term->alt_sblines; /* treeindex = y + count234(term->alt_screen); */ } } if (whichtree == term->scrollback) { unsigned char *cline = index234(whichtree, treeindex); line = decompressline(cline, NULL); } else { line = index234(whichtree, treeindex); } /* We assume that we don't screw up and retrieve something out of range. */ if (line == NULL) { modalfatalbox("line==NULL in terminal.c\n" "lineno=%d y=%d w=%d h=%d\n" "count(scrollback=%p)=%d\n" "count(screen=%p)=%d\n" "count(alt=%p)=%d alt_sblines=%d\n" "whichtree=%p treeindex=%d\n\n" "Please contact " "and pass on the above information.", lineno, y, term->cols, term->rows, term->scrollback, count234(term->scrollback), term->screen, count234(term->screen), term->alt_screen, count234(term->alt_screen), term->alt_sblines, whichtree, treeindex); } assert(line != NULL); /* * Here we resize lines to _at least_ the right length, but we * don't truncate them. Truncation is done as a side effect of * modifying the line. * * The point of this policy is to try to arrange that resizing the * terminal window repeatedly - e.g. successive steps in an X11 * opaque window-resize drag, or resizing as a side effect of * retiling by tiling WMs such as xmonad - does not throw away * data gratuitously. Specifically, we want a sequence of resize * operations with no terminal output between them to have the * same effect as a single resize to the ultimate terminal size, * and also (for the case in which xmonad narrows a window that's * scrolling things) we want scrolling up new text at the bottom * of a narrowed window to avoid truncating lines further up when * the window is re-widened. */ if (term->cols > line->cols) resizeline(term, line, term->cols); return line; } #define lineptr(x) (lineptr)(term,x,__LINE__,FALSE) #define scrlineptr(x) (lineptr)(term,x,__LINE__,TRUE) /* * Coerce a termline to the terminal's current width. Unlike the * optional resize in lineptr() above, this is potentially destructive * of text, since it can shrink as well as grow the line. * * We call this whenever a termline is actually going to be modified. * Helpfully, putting a single call to this function in check_boundary * deals with _nearly_ all such cases, leaving only a few things like * bulk erase and ESC#8 to handle separately. */ static void check_line_size(Terminal *term, termline *line) { if (term->cols != line->cols) /* trivial optimisation */ resizeline(term, line, term->cols); } static void term_schedule_tblink(Terminal *term); static void term_schedule_cblink(Terminal *term); static void term_timer(void *ctx, unsigned long now) { Terminal *term = (Terminal *)ctx; int update = FALSE; if (term->tblink_pending && now == term->next_tblink) { term->tblinker = !term->tblinker; term->tblink_pending = FALSE; term_schedule_tblink(term); update = TRUE; } if (term->cblink_pending && now == term->next_cblink) { term->cblinker = !term->cblinker; term->cblink_pending = FALSE; term_schedule_cblink(term); update = TRUE; } if (term->in_vbell && now == term->vbell_end) { term->in_vbell = FALSE; update = TRUE; } if (update || (term->window_update_pending && now == term->next_update)) term_update(term); } static void term_schedule_update(Terminal *term) { if (!term->window_update_pending) { term->window_update_pending = TRUE; term->next_update = schedule_timer(UPDATE_DELAY, term_timer, term); } } /* * Call this whenever the terminal window state changes, to queue * an update. */ static void seen_disp_event(Terminal *term) { term->seen_disp_event = TRUE; /* for scrollback-reset-on-activity */ term_schedule_update(term); } /* * Call when the terminal's blinking-text settings change, or when * a text blink has just occurred. */ static void term_schedule_tblink(Terminal *term) { if (term->blink_is_real) { if (!term->tblink_pending) term->next_tblink = schedule_timer(TBLINK_DELAY, term_timer, term); term->tblink_pending = TRUE; } else { term->tblinker = 1; /* reset when not in use */ term->tblink_pending = FALSE; } } /* * Likewise with cursor blinks. */ static void term_schedule_cblink(Terminal *term) { if (term->blink_cur && term->has_focus) { if (!term->cblink_pending) term->next_cblink = schedule_timer(CBLINK_DELAY, term_timer, term); term->cblink_pending = TRUE; } else { term->cblinker = 1; /* reset when not in use */ term->cblink_pending = FALSE; } } /* * Call to reset cursor blinking on new output. */ static void term_reset_cblink(Terminal *term) { seen_disp_event(term); term->cblinker = 1; term->cblink_pending = FALSE; term_schedule_cblink(term); } /* * Call to begin a visual bell. */ static void term_schedule_vbell(Terminal *term, int already_started, long startpoint) { long ticks_already_gone; if (already_started) ticks_already_gone = GETTICKCOUNT() - startpoint; else ticks_already_gone = 0; if (ticks_already_gone < VBELL_DELAY) { term->in_vbell = TRUE; term->vbell_end = schedule_timer(VBELL_DELAY - ticks_already_gone, term_timer, term); } else { term->in_vbell = FALSE; } } /* * Set up power-on settings for the terminal. * If 'clear' is false, don't actually clear the primary screen, and * position the cursor below the last non-blank line (scrolling if * necessary). */ static void power_on(Terminal *term, int clear) { term->alt_x = term->alt_y = 0; term->savecurs.x = term->savecurs.y = 0; term->alt_savecurs.x = term->alt_savecurs.y = 0; term->alt_t = term->marg_t = 0; if (term->rows != -1) term->alt_b = term->marg_b = term->rows - 1; else term->alt_b = term->marg_b = 0; if (term->cols != -1) { int i; for (i = 0; i < term->cols; i++) term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE); } term->alt_om = term->dec_om = conf_get_int(term->conf, CONF_dec_om); term->alt_ins = term->insert = FALSE; term->alt_wnext = term->wrapnext = term->save_wnext = term->alt_save_wnext = FALSE; term->alt_wrap = term->wrap = conf_get_int(term->conf, CONF_wrap_mode); term->alt_cset = term->cset = term->save_cset = term->alt_save_cset = 0; term->alt_utf = term->utf = term->save_utf = term->alt_save_utf = 0; term->utf_state = 0; term->alt_sco_acs = term->sco_acs = term->save_sco_acs = term->alt_save_sco_acs = 0; term->cset_attr[0] = term->cset_attr[1] = term->save_csattr = term->alt_save_csattr = CSET_ASCII; term->rvideo = 0; term->in_vbell = FALSE; term->cursor_on = 1; term->big_cursor = 0; term->default_attr = term->save_attr = term->alt_save_attr = term->curr_attr = ATTR_DEFAULT; term->curr_truecolour.fg = term->curr_truecolour.bg = optionalrgb_none; term->save_truecolour = term->alt_save_truecolour = term->curr_truecolour; term->term_editing = term->term_echoing = FALSE; term->app_cursor_keys = conf_get_int(term->conf, CONF_app_cursor); term->app_keypad_keys = conf_get_int(term->conf, CONF_app_keypad); term->use_bce = conf_get_int(term->conf, CONF_bce); term->blink_is_real = conf_get_int(term->conf, CONF_blinktext); term->erase_char = term->basic_erase_char; term->alt_which = 0; term_print_finish(term); term->xterm_mouse = 0; term->xterm_extended_mouse = 0; term->urxvt_extended_mouse = 0; set_raw_mouse_mode(term->frontend, FALSE); term->bracketed_paste = FALSE; { int i; for (i = 0; i < 256; i++) term->wordness[i] = conf_get_int_int(term->conf, CONF_wordness, i); } if (term->screen) { swap_screen(term, 1, FALSE, FALSE); erase_lots(term, FALSE, TRUE, TRUE); swap_screen(term, 0, FALSE, FALSE); if (clear) erase_lots(term, FALSE, TRUE, TRUE); term->curs.y = find_last_nonempty_line(term, term->screen) + 1; if (term->curs.y == term->rows) { term->curs.y--; scroll(term, 0, term->rows - 1, 1, TRUE); } } else { term->curs.y = 0; } term->curs.x = 0; term_schedule_tblink(term); term_schedule_cblink(term); } /* * Force a screen update. */ void term_update(Terminal *term) { Context ctx; term->window_update_pending = FALSE; ctx = get_ctx(term->frontend); if (ctx) { int need_sbar_update = term->seen_disp_event; if (term->seen_disp_event && term->scroll_on_disp) { term->disptop = 0; /* return to main screen */ term->seen_disp_event = 0; need_sbar_update = TRUE; } if (need_sbar_update) update_sbar(term); do_paint(term, ctx, TRUE); sys_cursor(term->frontend, term->curs.x, term->curs.y - term->disptop); free_ctx(ctx); } } /* * Called from front end when a keypress occurs, to trigger * anything magical that needs to happen in that situation. */ void term_seen_key_event(Terminal *term) { /* * On any keypress, clear the bell overload mechanism * completely, on the grounds that large numbers of * beeps coming from deliberate key action are likely * to be intended (e.g. beeps from filename completion * blocking repeatedly). */ term->beep_overloaded = FALSE; while (term->beephead) { struct beeptime *tmp = term->beephead; term->beephead = tmp->next; sfree(tmp); } term->beeptail = NULL; term->nbeeps = 0; /* * Reset the scrollback on keypress, if we're doing that. */ if (term->scroll_on_key) { term->disptop = 0; /* return to main screen */ seen_disp_event(term); } } /* * Same as power_on(), but an external function. */ void term_pwron(Terminal *term, int clear) { power_on(term, clear); if (term->ldisc) /* cause ldisc to notice changes */ ldisc_echoedit_update(term->ldisc); term->disptop = 0; deselect(term); term_update(term); } static void set_erase_char(Terminal *term) { term->erase_char = term->basic_erase_char; if (term->use_bce) { term->erase_char.attr = (term->curr_attr & (ATTR_FGMASK | ATTR_BGMASK)); term->erase_char.truecolour.bg = term->curr_truecolour.bg; } } /* * We copy a bunch of stuff out of the Conf structure into local * fields in the Terminal structure, to avoid the repeated tree234 * lookups which would be involved in fetching them from the former * every time. */ void term_copy_stuff_from_conf(Terminal *term) { term->ansi_colour = conf_get_int(term->conf, CONF_ansi_colour); term->arabicshaping = conf_get_int(term->conf, CONF_arabicshaping); term->beep = conf_get_int(term->conf, CONF_beep); term->bellovl = conf_get_int(term->conf, CONF_bellovl); term->bellovl_n = conf_get_int(term->conf, CONF_bellovl_n); term->bellovl_s = conf_get_int(term->conf, CONF_bellovl_s); term->bellovl_t = conf_get_int(term->conf, CONF_bellovl_t); term->bidi = conf_get_int(term->conf, CONF_bidi); term->bksp_is_delete = conf_get_int(term->conf, CONF_bksp_is_delete); term->blink_cur = conf_get_int(term->conf, CONF_blink_cur); term->blinktext = conf_get_int(term->conf, CONF_blinktext); term->cjk_ambig_wide = conf_get_int(term->conf, CONF_cjk_ambig_wide); term->conf_height = conf_get_int(term->conf, CONF_height); term->conf_width = conf_get_int(term->conf, CONF_width); term->crhaslf = conf_get_int(term->conf, CONF_crhaslf); term->erase_to_scrollback = conf_get_int(term->conf, CONF_erase_to_scrollback); term->funky_type = conf_get_int(term->conf, CONF_funky_type); term->lfhascr = conf_get_int(term->conf, CONF_lfhascr); term->logflush = conf_get_int(term->conf, CONF_logflush); term->logtype = conf_get_int(term->conf, CONF_logtype); term->mouse_override = conf_get_int(term->conf, CONF_mouse_override); term->nethack_keypad = conf_get_int(term->conf, CONF_nethack_keypad); term->no_alt_screen = conf_get_int(term->conf, CONF_no_alt_screen); term->no_applic_c = conf_get_int(term->conf, CONF_no_applic_c); term->no_applic_k = conf_get_int(term->conf, CONF_no_applic_k); term->no_dbackspace = conf_get_int(term->conf, CONF_no_dbackspace); term->no_mouse_rep = conf_get_int(term->conf, CONF_no_mouse_rep); term->no_remote_charset = conf_get_int(term->conf, CONF_no_remote_charset); term->no_remote_resize = conf_get_int(term->conf, CONF_no_remote_resize); term->no_remote_wintitle = conf_get_int(term->conf, CONF_no_remote_wintitle); term->no_remote_clearscroll = conf_get_int(term->conf, CONF_no_remote_clearscroll); term->rawcnp = conf_get_int(term->conf, CONF_rawcnp); term->rect_select = conf_get_int(term->conf, CONF_rect_select); term->remote_qtitle_action = conf_get_int(term->conf, CONF_remote_qtitle_action); term->rxvt_homeend = conf_get_int(term->conf, CONF_rxvt_homeend); term->scroll_on_disp = conf_get_int(term->conf, CONF_scroll_on_disp); term->scroll_on_key = conf_get_int(term->conf, CONF_scroll_on_key); term->xterm_256_colour = conf_get_int(term->conf, CONF_xterm_256_colour); term->true_colour = conf_get_int(term->conf, CONF_true_colour); /* * Parse the control-character escapes in the configured * answerback string. */ { char *answerback = conf_get_str(term->conf, CONF_answerback); int maxlen = strlen(answerback); term->answerback = snewn(maxlen, char); term->answerbacklen = 0; while (*answerback) { char *n; char c = ctrlparse(answerback, &n); if (n) { term->answerback[term->answerbacklen++] = c; answerback = n; } else { term->answerback[term->answerbacklen++] = *answerback++; } } } } /* * When the user reconfigures us, we need to check the forbidden- * alternate-screen config option, disable raw mouse mode if the * user has disabled mouse reporting, and abandon a print job if * the user has disabled printing. */ void term_reconfig(Terminal *term, Conf *conf) { /* * Before adopting the new config, check all those terminal * settings which control power-on defaults; and if they've * changed, we will modify the current state as well as the * default one. The full list is: Auto wrap mode, DEC Origin * Mode, BCE, blinking text, character classes. */ int reset_wrap, reset_decom, reset_bce, reset_tblink, reset_charclass; int i; reset_wrap = (conf_get_int(term->conf, CONF_wrap_mode) != conf_get_int(conf, CONF_wrap_mode)); reset_decom = (conf_get_int(term->conf, CONF_dec_om) != conf_get_int(conf, CONF_dec_om)); reset_bce = (conf_get_int(term->conf, CONF_bce) != conf_get_int(conf, CONF_bce)); reset_tblink = (conf_get_int(term->conf, CONF_blinktext) != conf_get_int(conf, CONF_blinktext)); reset_charclass = 0; for (i = 0; i < 256; i++) if (conf_get_int_int(term->conf, CONF_wordness, i) != conf_get_int_int(conf, CONF_wordness, i)) reset_charclass = 1; /* * If the bidi or shaping settings have changed, flush the bidi * cache completely. */ if (conf_get_int(term->conf, CONF_arabicshaping) != conf_get_int(conf, CONF_arabicshaping) || conf_get_int(term->conf, CONF_bidi) != conf_get_int(conf, CONF_bidi)) { for (i = 0; i < term->bidi_cache_size; i++) { sfree(term->pre_bidi_cache[i].chars); sfree(term->post_bidi_cache[i].chars); term->pre_bidi_cache[i].width = -1; term->pre_bidi_cache[i].chars = NULL; term->post_bidi_cache[i].width = -1; term->post_bidi_cache[i].chars = NULL; } } conf_free(term->conf); term->conf = conf_copy(conf); if (reset_wrap) term->alt_wrap = term->wrap = conf_get_int(term->conf, CONF_wrap_mode); if (reset_decom) term->alt_om = term->dec_om = conf_get_int(term->conf, CONF_dec_om); if (reset_bce) { term->use_bce = conf_get_int(term->conf, CONF_bce); set_erase_char(term); } if (reset_tblink) { term->blink_is_real = conf_get_int(term->conf, CONF_blinktext); } if (reset_charclass) for (i = 0; i < 256; i++) term->wordness[i] = conf_get_int_int(term->conf, CONF_wordness, i); if (conf_get_int(term->conf, CONF_no_alt_screen)) swap_screen(term, 0, FALSE, FALSE); if (conf_get_int(term->conf, CONF_no_mouse_rep)) { term->xterm_mouse = 0; set_raw_mouse_mode(term->frontend, 0); } if (conf_get_int(term->conf, CONF_no_remote_charset)) { term->cset_attr[0] = term->cset_attr[1] = CSET_ASCII; term->sco_acs = term->alt_sco_acs = 0; term->utf = 0; } if (!conf_get_str(term->conf, CONF_printer)) { term_print_finish(term); } term_schedule_tblink(term); term_schedule_cblink(term); term_copy_stuff_from_conf(term); } /* * Clear the scrollback. */ void term_clrsb(Terminal *term) { unsigned char *line; int i; /* * Scroll forward to the current screen, if we were back in the * scrollback somewhere until now. */ term->disptop = 0; /* * Clear the actual scrollback. */ while ((line = delpos234(term->scrollback, 0)) != NULL) { sfree(line); /* this is compressed data, not a termline */ } /* * When clearing the scrollback, we also truncate any termlines on * the current screen which have remembered data from a previous * larger window size. Rationale: clearing the scrollback is * sometimes done to protect privacy, so the user intention is * specifically that we should not retain evidence of what * previously happened in the terminal, and that ought to include * evidence to the right as well as evidence above. */ for (i = 0; i < term->rows; i++) check_line_size(term, scrlineptr(i)); /* * There are now no lines of real scrollback which can be pulled * back into the screen by a resize, and no lines of the alternate * screen which should be displayed as if part of the scrollback. */ term->tempsblines = 0; term->alt_sblines = 0; /* * Update the scrollbar to reflect the new state of the world. */ update_sbar(term); } const optionalrgb optionalrgb_none = {0, 0, 0, 0}; /* * Initialise the terminal. */ Terminal *term_init(Conf *myconf, struct unicode_data *ucsdata, void *frontend) { Terminal *term; /* * Allocate a new Terminal structure and initialise the fields * that need it. */ term = snew(Terminal); term->frontend = frontend; term->ucsdata = ucsdata; term->conf = conf_copy(myconf); term->logctx = NULL; term->compatibility_level = TM_PUTTY; strcpy(term->id_string, "\033[?6c"); term->cblink_pending = term->tblink_pending = FALSE; term->paste_buffer = NULL; term->paste_len = 0; bufchain_init(&term->inbuf); bufchain_init(&term->printer_buf); term->printing = term->only_printing = FALSE; term->print_job = NULL; term->vt52_mode = FALSE; term->cr_lf_return = FALSE; term->seen_disp_event = FALSE; term->mouse_is_down = FALSE; term->reset_132 = FALSE; term->cblinker = term->tblinker = 0; term->has_focus = 1; term->repeat_off = FALSE; term->termstate = TOPLEVEL; term->selstate = NO_SELECTION; term->curstype = 0; term_copy_stuff_from_conf(term); term->screen = term->alt_screen = term->scrollback = NULL; term->tempsblines = 0; term->alt_sblines = 0; term->disptop = 0; term->disptext = NULL; term->dispcursx = term->dispcursy = -1; term->tabs = NULL; deselect(term); term->rows = term->cols = -1; power_on(term, TRUE); term->beephead = term->beeptail = NULL; #ifdef OPTIMISE_SCROLL term->scrollhead = term->scrolltail = NULL; #endif /* OPTIMISE_SCROLL */ term->nbeeps = 0; term->lastbeep = FALSE; term->beep_overloaded = FALSE; term->attr_mask = 0xffffffff; term->resize_fn = NULL; term->resize_ctx = NULL; term->in_term_out = FALSE; term->ltemp = NULL; term->ltemp_size = 0; term->wcFrom = NULL; term->wcTo = NULL; term->wcFromTo_size = 0; term->window_update_pending = FALSE; term->bidi_cache_size = 0; term->pre_bidi_cache = term->post_bidi_cache = NULL; /* FULL-TERMCHAR */ term->basic_erase_char.chr = CSET_ASCII | ' '; term->basic_erase_char.attr = ATTR_DEFAULT; term->basic_erase_char.cc_next = 0; term->basic_erase_char.truecolour.fg = optionalrgb_none; term->basic_erase_char.truecolour.bg = optionalrgb_none; term->erase_char = term->basic_erase_char; term->last_selected_text = NULL; term->last_selected_attr = NULL; term->last_selected_tc = NULL; term->last_selected_len = 0; /* frontends will typically extend these with clipboard ids they * know about */ term->mouse_select_clipboards[0] = CLIP_LOCAL; term->n_mouse_select_clipboards = 1; term->mouse_paste_clipboard = CLIP_NULL; return term; } void term_free(Terminal *term) { termline *line; struct beeptime *beep; int i; while ((line = delpos234(term->scrollback, 0)) != NULL) sfree(line); /* compressed data, not a termline */ freetree234(term->scrollback); while ((line = delpos234(term->screen, 0)) != NULL) freeline(line); freetree234(term->screen); while ((line = delpos234(term->alt_screen, 0)) != NULL) freeline(line); freetree234(term->alt_screen); if (term->disptext) { for (i = 0; i < term->rows; i++) freeline(term->disptext[i]); } sfree(term->disptext); while (term->beephead) { beep = term->beephead; term->beephead = beep->next; sfree(beep); } bufchain_clear(&term->inbuf); if(term->print_job) printer_finish_job(term->print_job); bufchain_clear(&term->printer_buf); sfree(term->paste_buffer); sfree(term->ltemp); sfree(term->wcFrom); sfree(term->wcTo); sfree(term->answerback); for (i = 0; i < term->bidi_cache_size; i++) { sfree(term->pre_bidi_cache[i].chars); sfree(term->post_bidi_cache[i].chars); sfree(term->post_bidi_cache[i].forward); sfree(term->post_bidi_cache[i].backward); } sfree(term->pre_bidi_cache); sfree(term->post_bidi_cache); sfree(term->tabs); expire_timer_context(term); conf_free(term->conf); sfree(term); } /* * Set up the terminal for a given size. */ void term_size(Terminal *term, int newrows, int newcols, int newsavelines) { tree234 *newalt; termline **newdisp, *line; int i, j, oldrows = term->rows; int sblen; int save_alt_which = term->alt_which; if (newrows == term->rows && newcols == term->cols && newsavelines == term->savelines) return; /* nothing to do */ /* Behave sensibly if we're given zero (or negative) rows/cols */ if (newrows < 1) newrows = 1; if (newcols < 1) newcols = 1; deselect(term); swap_screen(term, 0, FALSE, FALSE); term->alt_t = term->marg_t = 0; term->alt_b = term->marg_b = newrows - 1; if (term->rows == -1) { term->scrollback = newtree234(NULL); term->screen = newtree234(NULL); term->tempsblines = 0; term->rows = 0; } /* * Resize the screen and scrollback. We only need to shift * lines around within our data structures, because lineptr() * will take care of resizing each individual line if * necessary. So: * * - If the new screen is longer, we shunt lines in from temporary * scrollback if possible, otherwise we add new blank lines at * the bottom. * * - If the new screen is shorter, we remove any blank lines at * the bottom if possible, otherwise shunt lines above the cursor * to scrollback if possible, otherwise delete lines below the * cursor. * * - Then, if the new scrollback length is less than the * amount of scrollback we actually have, we must throw some * away. */ sblen = count234(term->scrollback); /* Do this loop to expand the screen if newrows > rows */ assert(term->rows == count234(term->screen)); while (term->rows < newrows) { if (term->tempsblines > 0) { unsigned char *cline; /* Insert a line from the scrollback at the top of the screen. */ assert(sblen >= term->tempsblines); cline = delpos234(term->scrollback, --sblen); line = decompressline(cline, NULL); sfree(cline); line->temporary = FALSE; /* reconstituted line is now real */ term->tempsblines -= 1; addpos234(term->screen, line, 0); term->curs.y += 1; term->savecurs.y += 1; term->alt_y += 1; term->alt_savecurs.y += 1; } else { /* Add a new blank line at the bottom of the screen. */ line = newline(term, newcols, FALSE); addpos234(term->screen, line, count234(term->screen)); } term->rows += 1; } /* Do this loop to shrink the screen if newrows < rows */ while (term->rows > newrows) { if (term->curs.y < term->rows - 1) { /* delete bottom row, unless it contains the cursor */ line = delpos234(term->screen, term->rows - 1); freeline(line); } else { /* push top row to scrollback */ line = delpos234(term->screen, 0); addpos234(term->scrollback, compressline(line), sblen++); freeline(line); term->tempsblines += 1; term->curs.y -= 1; term->savecurs.y -= 1; term->alt_y -= 1; term->alt_savecurs.y -= 1; } term->rows -= 1; } assert(term->rows == newrows); assert(count234(term->screen) == newrows); /* Delete any excess lines from the scrollback. */ while (sblen > newsavelines) { line = delpos234(term->scrollback, 0); sfree(line); sblen--; } if (sblen < term->tempsblines) term->tempsblines = sblen; assert(count234(term->scrollback) <= newsavelines); assert(count234(term->scrollback) >= term->tempsblines); term->disptop = 0; /* Make a new displayed text buffer. */ newdisp = snewn(newrows, termline *); for (i = 0; i < newrows; i++) { newdisp[i] = newline(term, newcols, FALSE); for (j = 0; j < newcols; j++) newdisp[i]->chars[j].attr = ATTR_INVALID; } if (term->disptext) { for (i = 0; i < oldrows; i++) freeline(term->disptext[i]); } sfree(term->disptext); term->disptext = newdisp; term->dispcursx = term->dispcursy = -1; /* Make a new alternate screen. */ newalt = newtree234(NULL); for (i = 0; i < newrows; i++) { line = newline(term, newcols, TRUE); addpos234(newalt, line, i); } if (term->alt_screen) { while (NULL != (line = delpos234(term->alt_screen, 0))) freeline(line); freetree234(term->alt_screen); } term->alt_screen = newalt; term->alt_sblines = 0; term->tabs = sresize(term->tabs, newcols, unsigned char); { int i; for (i = (term->cols > 0 ? term->cols : 0); i < newcols; i++) term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE); } /* Check that the cursor positions are still valid. */ if (term->savecurs.y < 0) term->savecurs.y = 0; if (term->savecurs.y >= newrows) term->savecurs.y = newrows - 1; if (term->savecurs.x >= newcols) term->savecurs.x = newcols - 1; if (term->alt_savecurs.y < 0) term->alt_savecurs.y = 0; if (term->alt_savecurs.y >= newrows) term->alt_savecurs.y = newrows - 1; if (term->alt_savecurs.x >= newcols) term->alt_savecurs.x = newcols - 1; if (term->curs.y < 0) term->curs.y = 0; if (term->curs.y >= newrows) term->curs.y = newrows - 1; if (term->curs.x >= newcols) term->curs.x = newcols - 1; if (term->alt_y < 0) term->alt_y = 0; if (term->alt_y >= newrows) term->alt_y = newrows - 1; if (term->alt_x >= newcols) term->alt_x = newcols - 1; term->alt_x = term->alt_y = 0; term->wrapnext = term->alt_wnext = FALSE; term->rows = newrows; term->cols = newcols; term->savelines = newsavelines; swap_screen(term, save_alt_which, FALSE, FALSE); update_sbar(term); term_update(term); if (term->resize_fn) term->resize_fn(term->resize_ctx, term->cols, term->rows); } /* * Hand a function and context pointer to the terminal which it can * use to notify a back end of resizes. */ void term_provide_resize_fn(Terminal *term, void (*resize_fn)(void *, int, int), void *resize_ctx) { term->resize_fn = resize_fn; term->resize_ctx = resize_ctx; if (resize_fn && term->cols > 0 && term->rows > 0) resize_fn(resize_ctx, term->cols, term->rows); } /* Find the bottom line on the screen that has any content. * If only the top line has content, returns 0. * If no lines have content, return -1. */ static int find_last_nonempty_line(Terminal * term, tree234 * screen) { int i; for (i = count234(screen) - 1; i >= 0; i--) { termline *line = index234(screen, i); int j; for (j = 0; j < line->cols; j++) if (!termchars_equal(&line->chars[j], &term->erase_char)) break; if (j != line->cols) break; } return i; } /* * Swap screens. If `reset' is TRUE and we have been asked to * switch to the alternate screen, we must bring most of its * configuration from the main screen and erase the contents of the * alternate screen completely. (This is even true if we're already * on it! Blame xterm.) */ static void swap_screen(Terminal *term, int which, int reset, int keep_cur_pos) { int t; pos tp; truecolour ttc; tree234 *ttr; if (!which) reset = FALSE; /* do no weird resetting if which==0 */ if (which != term->alt_which) { term->alt_which = which; ttr = term->alt_screen; term->alt_screen = term->screen; term->screen = ttr; term->alt_sblines = find_last_nonempty_line(term, term->alt_screen) + 1; t = term->curs.x; if (!reset && !keep_cur_pos) term->curs.x = term->alt_x; term->alt_x = t; t = term->curs.y; if (!reset && !keep_cur_pos) term->curs.y = term->alt_y; term->alt_y = t; t = term->marg_t; if (!reset) term->marg_t = term->alt_t; term->alt_t = t; t = term->marg_b; if (!reset) term->marg_b = term->alt_b; term->alt_b = t; t = term->dec_om; if (!reset) term->dec_om = term->alt_om; term->alt_om = t; t = term->wrap; if (!reset) term->wrap = term->alt_wrap; term->alt_wrap = t; t = term->wrapnext; if (!reset) term->wrapnext = term->alt_wnext; term->alt_wnext = t; t = term->insert; if (!reset) term->insert = term->alt_ins; term->alt_ins = t; t = term->cset; if (!reset) term->cset = term->alt_cset; term->alt_cset = t; t = term->utf; if (!reset) term->utf = term->alt_utf; term->alt_utf = t; t = term->sco_acs; if (!reset) term->sco_acs = term->alt_sco_acs; term->alt_sco_acs = t; tp = term->savecurs; if (!reset && !keep_cur_pos) term->savecurs = term->alt_savecurs; term->alt_savecurs = tp; t = term->save_cset; if (!reset && !keep_cur_pos) term->save_cset = term->alt_save_cset; term->alt_save_cset = t; t = term->save_csattr; if (!reset && !keep_cur_pos) term->save_csattr = term->alt_save_csattr; term->alt_save_csattr = t; t = term->save_attr; if (!reset && !keep_cur_pos) term->save_attr = term->alt_save_attr; term->alt_save_attr = t; ttc = term->save_truecolour; if (!reset && !keep_cur_pos) term->save_truecolour = term->alt_save_truecolour; term->alt_save_truecolour = ttc; t = term->save_utf; if (!reset && !keep_cur_pos) term->save_utf = term->alt_save_utf; term->alt_save_utf = t; t = term->save_wnext; if (!reset && !keep_cur_pos) term->save_wnext = term->alt_save_wnext; term->alt_save_wnext = t; t = term->save_sco_acs; if (!reset && !keep_cur_pos) term->save_sco_acs = term->alt_save_sco_acs; term->alt_save_sco_acs = t; } if (reset && term->screen) { /* * Yes, this _is_ supposed to honour background-colour-erase. */ erase_lots(term, FALSE, TRUE, TRUE); } } /* * Update the scroll bar. */ static void update_sbar(Terminal *term) { int nscroll = sblines(term); set_sbar(term->frontend, nscroll + term->rows, nscroll + term->disptop, term->rows); } /* * Check whether the region bounded by the two pointers intersects * the scroll region, and de-select the on-screen selection if so. */ static void check_selection(Terminal *term, pos from, pos to) { if (poslt(from, term->selend) && poslt(term->selstart, to)) deselect(term); } /* * Scroll the screen. (`lines' is +ve for scrolling forward, -ve * for backward.) `sb' is TRUE if the scrolling is permitted to * affect the scrollback buffer. */ static void scroll(Terminal *term, int topline, int botline, int lines, int sb) { termline *line; int i, seltop, scrollwinsize; #ifdef OPTIMISE_SCROLL int olddisptop, shift; #endif /* OPTIMISE_SCROLL */ if (topline != 0 || term->alt_which != 0) sb = FALSE; #ifdef OPTIMISE_SCROLL olddisptop = term->disptop; shift = lines; #endif /* OPTIMISE_SCROLL */ scrollwinsize = botline - topline + 1; if (lines < 0) { lines = -lines; if (lines > scrollwinsize) lines = scrollwinsize; while (lines-- > 0) { line = delpos234(term->screen, botline); resizeline(term, line, term->cols); for (i = 0; i < term->cols; i++) copy_termchar(line, i, &term->erase_char); line->lattr = LATTR_NORM; addpos234(term->screen, line, topline); if (term->selstart.y >= topline && term->selstart.y <= botline) { term->selstart.y++; if (term->selstart.y > botline) { term->selstart.y = botline + 1; term->selstart.x = 0; } } if (term->selend.y >= topline && term->selend.y <= botline) { term->selend.y++; if (term->selend.y > botline) { term->selend.y = botline + 1; term->selend.x = 0; } } } } else { if (lines > scrollwinsize) lines = scrollwinsize; while (lines-- > 0) { line = delpos234(term->screen, topline); #ifdef TERM_CC_DIAGS cc_check(line); #endif if (sb && term->savelines > 0) { int sblen = count234(term->scrollback); /* * We must add this line to the scrollback. We'll * remove a line from the top of the scrollback if * the scrollback is full. */ if (sblen == term->savelines) { unsigned char *cline; sblen--; cline = delpos234(term->scrollback, 0); sfree(cline); } else term->tempsblines += 1; addpos234(term->scrollback, compressline(line), sblen); /* now `line' itself can be reused as the bottom line */ /* * If the user is currently looking at part of the * scrollback, and they haven't enabled any options * that are going to reset the scrollback as a * result of this movement, then the chances are * they'd like to keep looking at the same line. So * we move their viewpoint at the same rate as the * scroll, at least until their viewpoint hits the * top end of the scrollback buffer, at which point * we don't have the choice any more. * * Thanks to Jan Holmen Holsten for the idea and * initial implementation. */ if (term->disptop > -term->savelines && term->disptop < 0) term->disptop--; } resizeline(term, line, term->cols); for (i = 0; i < term->cols; i++) copy_termchar(line, i, &term->erase_char); line->lattr = LATTR_NORM; addpos234(term->screen, line, botline); /* * If the selection endpoints move into the scrollback, * we keep them moving until they hit the top. However, * of course, if the line _hasn't_ moved into the * scrollback then we don't do this, and cut them off * at the top of the scroll region. * * This applies to selstart and selend (for an existing * selection), and also selanchor (for one being * selected as we speak). */ seltop = sb ? -term->savelines : topline; if (term->selstate != NO_SELECTION) { if (term->selstart.y >= seltop && term->selstart.y <= botline) { term->selstart.y--; if (term->selstart.y < seltop) { term->selstart.y = seltop; term->selstart.x = 0; } } if (term->selend.y >= seltop && term->selend.y <= botline) { term->selend.y--; if (term->selend.y < seltop) { term->selend.y = seltop; term->selend.x = 0; } } if (term->selanchor.y >= seltop && term->selanchor.y <= botline) { term->selanchor.y--; if (term->selanchor.y < seltop) { term->selanchor.y = seltop; term->selanchor.x = 0; } } } } } #ifdef OPTIMISE_SCROLL shift += term->disptop - olddisptop; if (shift < term->rows && shift > -term->rows && shift != 0) scroll_display(term, topline, botline, shift); #endif /* OPTIMISE_SCROLL */ } #ifdef OPTIMISE_SCROLL /* * Add a scroll of a region on the screen into the pending scroll list. * `lines' is +ve for scrolling forward, -ve for backward. * * If the scroll is on the same area as the last scroll in the list, * merge them. */ static void save_scroll(Terminal *term, int topline, int botline, int lines) { struct scrollregion *newscroll; if (term->scrolltail && term->scrolltail->topline == topline && term->scrolltail->botline == botline) { term->scrolltail->lines += lines; } else { newscroll = snew(struct scrollregion); newscroll->topline = topline; newscroll->botline = botline; newscroll->lines = lines; newscroll->next = NULL; if (!term->scrollhead) term->scrollhead = newscroll; else term->scrolltail->next = newscroll; term->scrolltail = newscroll; } } /* * Scroll the physical display, and our conception of it in disptext. */ static void scroll_display(Terminal *term, int topline, int botline, int lines) { int distance, nlines, i, j; distance = lines > 0 ? lines : -lines; nlines = botline - topline + 1 - distance; if (lines > 0) { for (i = 0; i < nlines; i++) for (j = 0; j < term->cols; j++) copy_termchar(term->disptext[i], j, term->disptext[i+distance]->chars+j); if (term->dispcursy >= 0 && term->dispcursy >= topline + distance && term->dispcursy < topline + distance + nlines) term->dispcursy -= distance; for (i = 0; i < distance; i++) for (j = 0; j < term->cols; j++) term->disptext[nlines+i]->chars[j].attr |= ATTR_INVALID; } else { for (i = nlines; i-- ;) for (j = 0; j < term->cols; j++) copy_termchar(term->disptext[i+distance], j, term->disptext[i]->chars+j); if (term->dispcursy >= 0 && term->dispcursy >= topline && term->dispcursy < topline + nlines) term->dispcursy += distance; for (i = 0; i < distance; i++) for (j = 0; j < term->cols; j++) term->disptext[i]->chars[j].attr |= ATTR_INVALID; } save_scroll(term, topline, botline, lines); } #endif /* OPTIMISE_SCROLL */ /* * Move the cursor to a given position, clipping at boundaries. We * may or may not want to clip at the scroll margin: marg_clip is 0 * not to, 1 to disallow _passing_ the margins, and 2 to disallow * even _being_ outside the margins. */ static void move(Terminal *term, int x, int y, int marg_clip) { if (x < 0) x = 0; if (x >= term->cols) x = term->cols - 1; if (marg_clip) { if ((term->curs.y >= term->marg_t || marg_clip == 2) && y < term->marg_t) y = term->marg_t; if ((term->curs.y <= term->marg_b || marg_clip == 2) && y > term->marg_b) y = term->marg_b; } if (y < 0) y = 0; if (y >= term->rows) y = term->rows - 1; term->curs.x = x; term->curs.y = y; term->wrapnext = FALSE; } /* * Save or restore the cursor and SGR mode. */ static void save_cursor(Terminal *term, int save) { if (save) { term->savecurs = term->curs; term->save_attr = term->curr_attr; term->save_truecolour = term->curr_truecolour; term->save_cset = term->cset; term->save_utf = term->utf; term->save_wnext = term->wrapnext; term->save_csattr = term->cset_attr[term->cset]; term->save_sco_acs = term->sco_acs; } else { term->curs = term->savecurs; /* Make sure the window hasn't shrunk since the save */ if (term->curs.x >= term->cols) term->curs.x = term->cols - 1; if (term->curs.y >= term->rows) term->curs.y = term->rows - 1; term->curr_attr = term->save_attr; term->curr_truecolour = term->save_truecolour; term->cset = term->save_cset; term->utf = term->save_utf; term->wrapnext = term->save_wnext; /* * wrapnext might reset to False if the x position is no * longer at the rightmost edge. */ if (term->wrapnext && term->curs.x < term->cols-1) term->wrapnext = FALSE; term->cset_attr[term->cset] = term->save_csattr; term->sco_acs = term->save_sco_acs; set_erase_char(term); } } /* * This function is called before doing _anything_ which affects * only part of a line of text. It is used to mark the boundary * between two character positions, and it indicates that some sort * of effect is going to happen on only one side of that boundary. * * The effect of this function is to check whether a CJK * double-width character is straddling the boundary, and to remove * it and replace it with two spaces if so. (Of course, one or * other of those spaces is then likely to be replaced with * something else again, as a result of whatever happens next.) * * Also, if the boundary is at the right-hand _edge_ of the screen, * it implies something deliberate is being done to the rightmost * column position; hence we must clear LATTR_WRAPPED2. * * The input to the function is the coordinates of the _second_ * character of the pair. */ static void check_boundary(Terminal *term, int x, int y) { termline *ldata; /* Validate input coordinates, just in case. */ if (x <= 0 || x > term->cols) return; ldata = scrlineptr(y); check_line_size(term, ldata); if (x == term->cols) { ldata->lattr &= ~LATTR_WRAPPED2; } else { if (ldata->chars[x].chr == UCSWIDE) { clear_cc(ldata, x-1); clear_cc(ldata, x); ldata->chars[x-1].chr = ' ' | CSET_ASCII; ldata->chars[x] = ldata->chars[x-1]; } } } /* * Erase a large portion of the screen: the whole screen, or the * whole line, or parts thereof. */ static void erase_lots(Terminal *term, int line_only, int from_begin, int to_end) { pos start, end; int erase_lattr; int erasing_lines_from_top = 0; if (line_only) { start.y = term->curs.y; start.x = 0; end.y = term->curs.y + 1; end.x = 0; erase_lattr = FALSE; } else { start.y = 0; start.x = 0; end.y = term->rows; end.x = 0; erase_lattr = TRUE; } if (!from_begin) { start = term->curs; } if (!to_end) { end = term->curs; incpos(end); } if (!from_begin || !to_end) check_boundary(term, term->curs.x, term->curs.y); check_selection(term, start, end); /* Clear screen also forces a full window redraw, just in case. */ if (start.y == 0 && start.x == 0 && end.y == term->rows) term_invalidate(term); /* Lines scrolled away shouldn't be brought back on if the terminal * resizes. */ if (start.y == 0 && start.x == 0 && end.x == 0 && erase_lattr) erasing_lines_from_top = 1; if (term->erase_to_scrollback && erasing_lines_from_top) { /* If it's a whole number of lines, starting at the top, and * we're fully erasing them, erase by scrolling and keep the * lines in the scrollback. */ int scrolllines = end.y; if (end.y == term->rows) { /* Shrink until we find a non-empty row.*/ scrolllines = find_last_nonempty_line(term, term->screen) + 1; } if (scrolllines > 0) scroll(term, 0, scrolllines - 1, scrolllines, TRUE); } else { termline *ldata = scrlineptr(start.y); while (poslt(start, end)) { check_line_size(term, ldata); if (start.x == term->cols) { if (!erase_lattr) ldata->lattr &= ~(LATTR_WRAPPED | LATTR_WRAPPED2); else ldata->lattr = LATTR_NORM; } else { copy_termchar(ldata, start.x, &term->erase_char); } if (incpos(start) && start.y < term->rows) { ldata = scrlineptr(start.y); } } } /* After an erase of lines from the top of the screen, we shouldn't * bring the lines back again if the terminal enlarges (since the user or * application has explicitly thrown them away). */ if (erasing_lines_from_top && !(term->alt_which)) term->tempsblines = 0; } /* * Insert or delete characters within the current line. n is +ve if * insertion is desired, and -ve for deletion. */ static void insch(Terminal *term, int n) { int dir = (n < 0 ? -1 : +1); int m, j; pos eol; termline *ldata; n = (n < 0 ? -n : n); if (n > term->cols - term->curs.x) n = term->cols - term->curs.x; m = term->cols - term->curs.x - n; /* * We must de-highlight the selection if it overlaps any part of * the region affected by this operation, i.e. the region from the * current cursor position to end-of-line, _unless_ the entirety * of the selection is going to be moved to the left or right by * this operation but otherwise unchanged, in which case we can * simply move the highlight with the text. */ eol.y = term->curs.y; eol.x = term->cols; if (poslt(term->curs, term->selend) && poslt(term->selstart, eol)) { pos okstart = term->curs; pos okend = eol; if (dir > 0) { /* Insertion: n characters at EOL will be splatted. */ okend.x -= n; } else { /* Deletion: n characters at cursor position will be splatted. */ okstart.x += n; } if (posle(okstart, term->selstart) && posle(term->selend, okend)) { /* Selection is contained entirely in the interval * [okstart,okend), so we need only adjust the selection * bounds. */ term->selstart.x += dir * n; term->selend.x += dir * n; assert(term->selstart.x >= term->curs.x); assert(term->selstart.x < term->cols); assert(term->selend.x > term->curs.x); assert(term->selend.x <= term->cols); } else { /* Selection is not wholly contained in that interval, so * we must unhighlight it. */ deselect(term); } } check_boundary(term, term->curs.x, term->curs.y); if (dir < 0) check_boundary(term, term->curs.x + n, term->curs.y); ldata = scrlineptr(term->curs.y); if (dir < 0) { for (j = 0; j < m; j++) move_termchar(ldata, ldata->chars + term->curs.x + j, ldata->chars + term->curs.x + j + n); while (n--) copy_termchar(ldata, term->curs.x + m++, &term->erase_char); } else { for (j = m; j-- ;) move_termchar(ldata, ldata->chars + term->curs.x + j + n, ldata->chars + term->curs.x + j); while (n--) copy_termchar(ldata, term->curs.x + n, &term->erase_char); } } /* * Toggle terminal mode `mode' to state `state'. (`query' indicates * whether the mode is a DEC private one or a normal one.) */ static void toggle_mode(Terminal *term, int mode, int query, int state) { if (query) switch (mode) { case 1: /* DECCKM: application cursor keys */ term->app_cursor_keys = state; break; case 2: /* DECANM: VT52 mode */ term->vt52_mode = !state; if (term->vt52_mode) { term->blink_is_real = FALSE; term->vt52_bold = FALSE; } else { term->blink_is_real = term->blinktext; } term_schedule_tblink(term); break; case 3: /* DECCOLM: 80/132 columns */ deselect(term); if (!term->no_remote_resize) request_resize(term->frontend, state ? 132 : 80, term->rows); term->reset_132 = state; term->alt_t = term->marg_t = 0; term->alt_b = term->marg_b = term->rows - 1; move(term, 0, 0, 0); erase_lots(term, FALSE, TRUE, TRUE); break; case 5: /* DECSCNM: reverse video */ /* * Toggle reverse video. If we receive an OFF within the * visual bell timeout period after an ON, we trigger an * effective visual bell, so that ESC[?5hESC[?5l will * always be an actually _visible_ visual bell. */ if (term->rvideo && !state) { /* This is an OFF, so set up a vbell */ term_schedule_vbell(term, TRUE, term->rvbell_startpoint); } else if (!term->rvideo && state) { /* This is an ON, so we notice the time and save it. */ term->rvbell_startpoint = GETTICKCOUNT(); } term->rvideo = state; seen_disp_event(term); break; case 6: /* DECOM: DEC origin mode */ term->dec_om = state; break; case 7: /* DECAWM: auto wrap */ term->wrap = state; break; case 8: /* DECARM: auto key repeat */ term->repeat_off = !state; break; case 10: /* DECEDM: set local edit mode */ term->term_editing = state; if (term->ldisc) /* cause ldisc to notice changes */ ldisc_echoedit_update(term->ldisc); break; case 25: /* DECTCEM: enable/disable cursor */ compatibility2(OTHER, VT220); term->cursor_on = state; seen_disp_event(term); break; case 47: /* alternate screen */ compatibility(OTHER); deselect(term); swap_screen(term, term->no_alt_screen ? 0 : state, FALSE, FALSE); if (term->scroll_on_disp) term->disptop = 0; break; case 1000: /* xterm mouse 1 (normal) */ term->xterm_mouse = state ? 1 : 0; set_raw_mouse_mode(term->frontend, state); break; case 1002: /* xterm mouse 2 (inc. button drags) */ term->xterm_mouse = state ? 2 : 0; set_raw_mouse_mode(term->frontend, state); break; case 1006: /* xterm extended mouse */ term->xterm_extended_mouse = state ? 1 : 0; break; case 1015: /* urxvt extended mouse */ term->urxvt_extended_mouse = state ? 1 : 0; break; case 1047: /* alternate screen */ compatibility(OTHER); deselect(term); swap_screen(term, term->no_alt_screen ? 0 : state, TRUE, TRUE); if (term->scroll_on_disp) term->disptop = 0; break; case 1048: /* save/restore cursor */ if (!term->no_alt_screen) save_cursor(term, state); if (!state) seen_disp_event(term); break; case 1049: /* cursor & alternate screen */ if (state && !term->no_alt_screen) save_cursor(term, state); if (!state) seen_disp_event(term); compatibility(OTHER); deselect(term); swap_screen(term, term->no_alt_screen ? 0 : state, TRUE, FALSE); if (!state && !term->no_alt_screen) save_cursor(term, state); if (term->scroll_on_disp) term->disptop = 0; break; case 2004: /* xterm bracketed paste */ term->bracketed_paste = state ? TRUE : FALSE; break; } else switch (mode) { case 4: /* IRM: set insert mode */ compatibility(VT102); term->insert = state; break; case 12: /* SRM: set echo mode */ term->term_echoing = !state; if (term->ldisc) /* cause ldisc to notice changes */ ldisc_echoedit_update(term->ldisc); break; case 20: /* LNM: Return sends ... */ term->cr_lf_return = state; break; case 34: /* WYULCURM: Make cursor BIG */ compatibility2(OTHER, VT220); term->big_cursor = !state; } } /* * Process an OSC sequence: set window title or icon name. */ static void do_osc(Terminal *term) { if (term->osc_w) { while (term->osc_strlen--) term->wordness[(unsigned char) term->osc_string[term->osc_strlen]] = term->esc_args[0]; } else { term->osc_string[term->osc_strlen] = '\0'; switch (term->esc_args[0]) { case 0: case 1: if (!term->no_remote_wintitle) set_icon(term->frontend, term->osc_string); if (term->esc_args[0] == 1) break; /* fall through: parameter 0 means set both */ case 2: case 21: if (!term->no_remote_wintitle) set_title(term->frontend, term->osc_string); break; case 4: if (term->ldisc && !strcmp(term->osc_string, "?")) { int r, g, b; if (palette_get(term->frontend, toint(term->esc_args[1]), &r, &g, &b)) { char *reply_buf = dupprintf( "\033]4;%u;rgb:%04x/%04x/%04x\007", term->esc_args[1], (unsigned)r * 0x0101, (unsigned)g * 0x0101, (unsigned)b * 0x0101); ldisc_send(term->ldisc, reply_buf, strlen(reply_buf), 0); sfree(reply_buf); } } break; } } } /* * ANSI printing routines. */ static void term_print_setup(Terminal *term, char *printer) { bufchain_clear(&term->printer_buf); term->print_job = printer_start_job(printer); } static void term_print_flush(Terminal *term) { void *data; int len; int size; while ((size = bufchain_size(&term->printer_buf)) > 5) { bufchain_prefix(&term->printer_buf, &data, &len); if (len > size-5) len = size-5; printer_job_data(term->print_job, data, len); bufchain_consume(&term->printer_buf, len); } } static void term_print_finish(Terminal *term) { void *data; int len, size; char c; if (!term->printing && !term->only_printing) return; /* we need do nothing */ term_print_flush(term); while ((size = bufchain_size(&term->printer_buf)) > 0) { bufchain_prefix(&term->printer_buf, &data, &len); c = *(char *)data; if (c == '\033' || c == '\233') { bufchain_consume(&term->printer_buf, size); break; } else { printer_job_data(term->print_job, &c, 1); bufchain_consume(&term->printer_buf, 1); } } printer_finish_job(term->print_job); term->print_job = NULL; term->printing = term->only_printing = FALSE; } /* * Remove everything currently in `inbuf' and stick it up on the * in-memory display. There's a big state machine in here to * process escape sequences... */ static void term_out(Terminal *term) { unsigned long c; int unget; unsigned char localbuf[256], *chars; int nchars = 0; unget = -1; chars = NULL; /* placate compiler warnings */ while (nchars > 0 || unget != -1 || bufchain_size(&term->inbuf) > 0) { if (unget == -1) { if (nchars == 0) { void *ret; bufchain_prefix(&term->inbuf, &ret, &nchars); if (nchars > sizeof(localbuf)) nchars = sizeof(localbuf); memcpy(localbuf, ret, nchars); bufchain_consume(&term->inbuf, nchars); chars = localbuf; assert(chars != NULL); } c = *chars++; nchars--; /* * Optionally log the session traffic to a file. Useful for * debugging and possibly also useful for actual logging. */ if (term->logtype == LGTYP_DEBUG && term->logctx) logtraffic(term->logctx, (unsigned char) c, LGTYP_DEBUG); } else { c = unget; unget = -1; } /* Note only VT220+ are 8-bit VT102 is seven bit, it shouldn't even * be able to display 8-bit characters, but I'll let that go 'cause * of i18n. */ /* * If we're printing, add the character to the printer * buffer. */ if (term->printing) { bufchain_add(&term->printer_buf, &c, 1); /* * If we're in print-only mode, we use a much simpler * state machine designed only to recognise the ESC[4i * termination sequence. */ if (term->only_printing) { if (c == '\033') term->print_state = 1; else if (c == (unsigned char)'\233') term->print_state = 2; else if (c == '[' && term->print_state == 1) term->print_state = 2; else if (c == '4' && term->print_state == 2) term->print_state = 3; else if (c == 'i' && term->print_state == 3) term->print_state = 4; else term->print_state = 0; if (term->print_state == 4) { term_print_finish(term); } continue; } } /* First see about all those translations. */ if (term->termstate == TOPLEVEL) { if (in_utf(term)) switch (term->utf_state) { case 0: if (c < 0x80) { /* UTF-8 must be stateless so we ignore iso2022. */ if (term->ucsdata->unitab_ctrl[c] != 0xFF) c = term->ucsdata->unitab_ctrl[c]; else c = ((unsigned char)c) | CSET_ASCII; break; } else if ((c & 0xe0) == 0xc0) { term->utf_size = term->utf_state = 1; term->utf_char = (c & 0x1f); } else if ((c & 0xf0) == 0xe0) { term->utf_size = term->utf_state = 2; term->utf_char = (c & 0x0f); } else if ((c & 0xf8) == 0xf0) { term->utf_size = term->utf_state = 3; term->utf_char = (c & 0x07); } else if ((c & 0xfc) == 0xf8) { term->utf_size = term->utf_state = 4; term->utf_char = (c & 0x03); } else if ((c & 0xfe) == 0xfc) { term->utf_size = term->utf_state = 5; term->utf_char = (c & 0x01); } else { c = UCSERR; break; } continue; case 1: case 2: case 3: case 4: case 5: if ((c & 0xC0) != 0x80) { unget = c; c = UCSERR; term->utf_state = 0; break; } term->utf_char = (term->utf_char << 6) | (c & 0x3f); if (--term->utf_state) continue; c = term->utf_char; /* Is somebody trying to be evil! */ if (c < 0x80 || (c < 0x800 && term->utf_size >= 2) || (c < 0x10000 && term->utf_size >= 3) || (c < 0x200000 && term->utf_size >= 4) || (c < 0x4000000 && term->utf_size >= 5)) c = UCSERR; /* Unicode line separator and paragraph separator are CR-LF */ if (c == 0x2028 || c == 0x2029) c = 0x85; /* High controls are probably a Baaad idea too. */ if (c < 0xA0) c = 0xFFFD; /* The UTF-16 surrogates are not nice either. */ /* The standard give the option of decoding these: * I don't want to! */ if (c >= 0xD800 && c < 0xE000) c = UCSERR; /* ISO 10646 characters now limited to UTF-16 range. */ if (c > 0x10FFFF) c = UCSERR; /* This is currently a TagPhobic application.. */ if (c >= 0xE0000 && c <= 0xE007F) continue; /* U+FEFF is best seen as a null. */ if (c == 0xFEFF) continue; /* But U+FFFE is an error. */ if (c == 0xFFFE || c == 0xFFFF) c = UCSERR; break; } /* Are we in the nasty ACS mode? Note: no sco in utf mode. */ else if(term->sco_acs && (c!='\033' && c!='\012' && c!='\015' && c!='\b')) { if (term->sco_acs == 2) c |= 0x80; c |= CSET_SCOACS; } else { switch (term->cset_attr[term->cset]) { /* * Linedraw characters are different from 'ESC ( B' * only for a small range. For ones outside that * range, make sure we use the same font as well as * the same encoding. */ case CSET_LINEDRW: if (term->ucsdata->unitab_ctrl[c] != 0xFF) c = term->ucsdata->unitab_ctrl[c]; else c = ((unsigned char) c) | CSET_LINEDRW; break; case CSET_GBCHR: /* If UK-ASCII, make the '#' a LineDraw Pound */ if (c == '#') { c = '}' | CSET_LINEDRW; break; } /*FALLTHROUGH*/ case CSET_ASCII: if (term->ucsdata->unitab_ctrl[c] != 0xFF) c = term->ucsdata->unitab_ctrl[c]; else c = ((unsigned char) c) | CSET_ASCII; break; case CSET_SCOACS: if (c>=' ') c = ((unsigned char)c) | CSET_SCOACS; break; } } } /* * How about C1 controls? * Explicitly ignore SCI (0x9a), which we don't translate to DECID. */ if ((c & -32) == 0x80 && term->termstate < DO_CTRLS && !term->vt52_mode && has_compat(VT220)) { if (c == 0x9a) c = 0; else { term->termstate = SEEN_ESC; term->esc_query = FALSE; c = '@' + (c & 0x1F); } } /* Or the GL control. */ if (c == '\177' && term->termstate < DO_CTRLS && has_compat(OTHER)) { if (term->curs.x && !term->wrapnext) term->curs.x--; term->wrapnext = FALSE; /* destructive backspace might be disabled */ if (!term->no_dbackspace) { check_boundary(term, term->curs.x, term->curs.y); check_boundary(term, term->curs.x+1, term->curs.y); copy_termchar(scrlineptr(term->curs.y), term->curs.x, &term->erase_char); } } else /* Or normal C0 controls. */ if ((c & ~0x1F) == 0 && term->termstate < DO_CTRLS) { switch (c) { case '\005': /* ENQ: terminal type query */ /* * Strictly speaking this is VT100 but a VT100 defaults to * no response. Other terminals respond at their option. * * Don't put a CR in the default string as this tends to * upset some weird software. */ compatibility(ANSIMIN); if (term->ldisc) { lpage_send(term->ldisc, DEFAULT_CODEPAGE, term->answerback, term->answerbacklen, 0); } break; case '\007': /* BEL: Bell */ { struct beeptime *newbeep; unsigned long ticks; ticks = GETTICKCOUNT(); if (!term->beep_overloaded) { newbeep = snew(struct beeptime); newbeep->ticks = ticks; newbeep->next = NULL; if (!term->beephead) term->beephead = newbeep; else term->beeptail->next = newbeep; term->beeptail = newbeep; term->nbeeps++; } /* * Throw out any beeps that happened more than * t seconds ago. */ while (term->beephead && term->beephead->ticks < ticks - term->bellovl_t) { struct beeptime *tmp = term->beephead; term->beephead = tmp->next; sfree(tmp); if (!term->beephead) term->beeptail = NULL; term->nbeeps--; } if (term->bellovl && term->beep_overloaded && ticks - term->lastbeep >= (unsigned)term->bellovl_s) { /* * If we're currently overloaded and the * last beep was more than s seconds ago, * leave overload mode. */ term->beep_overloaded = FALSE; } else if (term->bellovl && !term->beep_overloaded && term->nbeeps >= term->bellovl_n) { /* * Now, if we have n or more beeps * remaining in the queue, go into overload * mode. */ term->beep_overloaded = TRUE; } term->lastbeep = ticks; /* * Perform an actual beep if we're not overloaded. */ if (!term->bellovl || !term->beep_overloaded) { do_beep(term->frontend, term->beep); if (term->beep == BELL_VISUAL) { term_schedule_vbell(term, FALSE, 0); } } seen_disp_event(term); } break; case '\b': /* BS: Back space */ if (term->curs.x == 0 && (term->curs.y == 0 || term->wrap == 0)) /* do nothing */ ; else if (term->curs.x == 0 && term->curs.y > 0) term->curs.x = term->cols - 1, term->curs.y--; else if (term->wrapnext) term->wrapnext = FALSE; else term->curs.x--; seen_disp_event(term); break; case '\016': /* LS1: Locking-shift one */ compatibility(VT100); term->cset = 1; break; case '\017': /* LS0: Locking-shift zero */ compatibility(VT100); term->cset = 0; break; case '\033': /* ESC: Escape */ if (term->vt52_mode) term->termstate = VT52_ESC; else { compatibility(ANSIMIN); term->termstate = SEEN_ESC; term->esc_query = FALSE; } break; case '\015': /* CR: Carriage return */ term->curs.x = 0; term->wrapnext = FALSE; seen_disp_event(term); if (term->crhaslf) { if (term->curs.y == term->marg_b) scroll(term, term->marg_t, term->marg_b, 1, TRUE); else if (term->curs.y < term->rows - 1) term->curs.y++; } if (term->logctx) logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII); break; case '\014': /* FF: Form feed */ if (has_compat(SCOANSI)) { move(term, 0, 0, 0); erase_lots(term, FALSE, FALSE, TRUE); if (term->scroll_on_disp) term->disptop = 0; term->wrapnext = FALSE; seen_disp_event(term); break; } case '\013': /* VT: Line tabulation */ compatibility(VT100); case '\012': /* LF: Line feed */ if (term->curs.y == term->marg_b) scroll(term, term->marg_t, term->marg_b, 1, TRUE); else if (term->curs.y < term->rows - 1) term->curs.y++; if (term->lfhascr) term->curs.x = 0; term->wrapnext = FALSE; seen_disp_event(term); if (term->logctx) logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII); break; case '\t': /* HT: Character tabulation */ { pos old_curs = term->curs; termline *ldata = scrlineptr(term->curs.y); do { term->curs.x++; } while (term->curs.x < term->cols - 1 && !term->tabs[term->curs.x]); if ((ldata->lattr & LATTR_MODE) != LATTR_NORM) { if (term->curs.x >= term->cols / 2) term->curs.x = term->cols / 2 - 1; } else { if (term->curs.x >= term->cols) term->curs.x = term->cols - 1; } check_selection(term, old_curs, term->curs); } seen_disp_event(term); break; } } else switch (term->termstate) { case TOPLEVEL: /* Only graphic characters get this far; * ctrls are stripped above */ { termline *cline = scrlineptr(term->curs.y); int width = 0; if (DIRECT_CHAR(c)) width = 1; if (!width) width = (term->cjk_ambig_wide ? mk_wcwidth_cjk((unsigned int) c) : mk_wcwidth((unsigned int) c)); if (term->wrapnext && term->wrap && width > 0) { cline->lattr |= LATTR_WRAPPED; if (term->curs.y == term->marg_b) scroll(term, term->marg_t, term->marg_b, 1, TRUE); else if (term->curs.y < term->rows - 1) term->curs.y++; term->curs.x = 0; term->wrapnext = FALSE; cline = scrlineptr(term->curs.y); } if (term->insert && width > 0) insch(term, width); if (term->selstate != NO_SELECTION) { pos cursplus = term->curs; incpos(cursplus); check_selection(term, term->curs, cursplus); } if (((c & CSET_MASK) == CSET_ASCII || (c & CSET_MASK) == 0) && term->logctx) logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII); switch (width) { case 2: /* * If we're about to display a double-width * character starting in the rightmost * column, then we do something special * instead. We must print a space in the * last column of the screen, then wrap; * and we also set LATTR_WRAPPED2 which * instructs subsequent cut-and-pasting not * only to splice this line to the one * after it, but to ignore the space in the * last character position as well. * (Because what was actually output to the * terminal was presumably just a sequence * of CJK characters, and we don't want a * space to be pasted in the middle of * those just because they had the * misfortune to start in the wrong parity * column. xterm concurs.) */ check_boundary(term, term->curs.x, term->curs.y); check_boundary(term, term->curs.x+2, term->curs.y); if (term->curs.x == term->cols-1) { copy_termchar(cline, term->curs.x, &term->erase_char); cline->lattr |= LATTR_WRAPPED | LATTR_WRAPPED2; if (term->curs.y == term->marg_b) scroll(term, term->marg_t, term->marg_b, 1, TRUE); else if (term->curs.y < term->rows - 1) term->curs.y++; term->curs.x = 0; cline = scrlineptr(term->curs.y); /* Now we must check_boundary again, of course. */ check_boundary(term, term->curs.x, term->curs.y); check_boundary(term, term->curs.x+2, term->curs.y); } /* FULL-TERMCHAR */ clear_cc(cline, term->curs.x); cline->chars[term->curs.x].chr = c; cline->chars[term->curs.x].attr = term->curr_attr; cline->chars[term->curs.x].truecolour = term->curr_truecolour; term->curs.x++; /* FULL-TERMCHAR */ clear_cc(cline, term->curs.x); cline->chars[term->curs.x].chr = UCSWIDE; cline->chars[term->curs.x].attr = term->curr_attr; cline->chars[term->curs.x].truecolour = term->curr_truecolour; break; case 1: check_boundary(term, term->curs.x, term->curs.y); check_boundary(term, term->curs.x+1, term->curs.y); /* FULL-TERMCHAR */ clear_cc(cline, term->curs.x); cline->chars[term->curs.x].chr = c; cline->chars[term->curs.x].attr = term->curr_attr; cline->chars[term->curs.x].truecolour = term->curr_truecolour; break; case 0: if (term->curs.x > 0) { int x = term->curs.x - 1; /* If we're in wrapnext state, the character * to combine with is _here_, not to our left. */ if (term->wrapnext) x++; /* * If the previous character is * UCSWIDE, back up another one. */ if (cline->chars[x].chr == UCSWIDE) { assert(x > 0); x--; } add_cc(cline, x, c); seen_disp_event(term); } continue; default: continue; } term->curs.x++; if (term->curs.x == term->cols) { term->curs.x--; term->wrapnext = TRUE; if (term->wrap && term->vt52_mode) { cline->lattr |= LATTR_WRAPPED; if (term->curs.y == term->marg_b) scroll(term, term->marg_t, term->marg_b, 1, TRUE); else if (term->curs.y < term->rows - 1) term->curs.y++; term->curs.x = 0; term->wrapnext = FALSE; } } seen_disp_event(term); } break; case OSC_MAYBE_ST: /* * This state is virtually identical to SEEN_ESC, with the * exception that we have an OSC sequence in the pipeline, * and _if_ we see a backslash, we process it. */ if (c == '\\') { do_osc(term); term->termstate = TOPLEVEL; break; } /* else fall through */ case SEEN_ESC: if (c >= ' ' && c <= '/') { if (term->esc_query) term->esc_query = -1; else term->esc_query = c; break; } term->termstate = TOPLEVEL; switch (ANSI(c, term->esc_query)) { case '[': /* enter CSI mode */ term->termstate = SEEN_CSI; term->esc_nargs = 1; term->esc_args[0] = ARG_DEFAULT; term->esc_query = FALSE; break; case ']': /* OSC: xterm escape sequences */ /* Compatibility is nasty here, xterm, linux, decterm yuk! */ compatibility(OTHER); term->termstate = SEEN_OSC; term->esc_args[0] = 0; term->esc_nargs = 1; break; case '7': /* DECSC: save cursor */ compatibility(VT100); save_cursor(term, TRUE); break; case '8': /* DECRC: restore cursor */ compatibility(VT100); save_cursor(term, FALSE); seen_disp_event(term); break; case '=': /* DECKPAM: Keypad application mode */ compatibility(VT100); term->app_keypad_keys = TRUE; break; case '>': /* DECKPNM: Keypad numeric mode */ compatibility(VT100); term->app_keypad_keys = FALSE; break; case 'D': /* IND: exactly equivalent to LF */ compatibility(VT100); if (term->curs.y == term->marg_b) scroll(term, term->marg_t, term->marg_b, 1, TRUE); else if (term->curs.y < term->rows - 1) term->curs.y++; term->wrapnext = FALSE; seen_disp_event(term); break; case 'E': /* NEL: exactly equivalent to CR-LF */ compatibility(VT100); term->curs.x = 0; if (term->curs.y == term->marg_b) scroll(term, term->marg_t, term->marg_b, 1, TRUE); else if (term->curs.y < term->rows - 1) term->curs.y++; term->wrapnext = FALSE; seen_disp_event(term); break; case 'M': /* RI: reverse index - backwards LF */ compatibility(VT100); if (term->curs.y == term->marg_t) scroll(term, term->marg_t, term->marg_b, -1, TRUE); else if (term->curs.y > 0) term->curs.y--; term->wrapnext = FALSE; seen_disp_event(term); break; case 'Z': /* DECID: terminal type query */ compatibility(VT100); if (term->ldisc && term->id_string[0]) ldisc_send(term->ldisc, term->id_string, strlen(term->id_string), 0); break; case 'c': /* RIS: restore power-on settings */ compatibility(VT100); power_on(term, TRUE); if (term->ldisc) /* cause ldisc to notice changes */ ldisc_echoedit_update(term->ldisc); if (term->reset_132) { if (!term->no_remote_resize) request_resize(term->frontend, 80, term->rows); term->reset_132 = 0; } if (term->scroll_on_disp) term->disptop = 0; seen_disp_event(term); break; case 'H': /* HTS: set a tab */ compatibility(VT100); term->tabs[term->curs.x] = TRUE; break; case ANSI('8', '#'): /* DECALN: fills screen with Es :-) */ compatibility(VT100); { termline *ldata; int i, j; pos scrtop, scrbot; for (i = 0; i < term->rows; i++) { ldata = scrlineptr(i); check_line_size(term, ldata); for (j = 0; j < term->cols; j++) { copy_termchar(ldata, j, &term->basic_erase_char); ldata->chars[j].chr = 'E'; } ldata->lattr = LATTR_NORM; } if (term->scroll_on_disp) term->disptop = 0; seen_disp_event(term); scrtop.x = scrtop.y = 0; scrbot.x = 0; scrbot.y = term->rows; check_selection(term, scrtop, scrbot); } break; case ANSI('3', '#'): case ANSI('4', '#'): case ANSI('5', '#'): case ANSI('6', '#'): compatibility(VT100); { int nlattr; termline *ldata; switch (ANSI(c, term->esc_query)) { case ANSI('3', '#'): /* DECDHL: 2*height, top */ nlattr = LATTR_TOP; break; case ANSI('4', '#'): /* DECDHL: 2*height, bottom */ nlattr = LATTR_BOT; break; case ANSI('5', '#'): /* DECSWL: normal */ nlattr = LATTR_NORM; break; default: /* case ANSI('6', '#'): DECDWL: 2*width */ nlattr = LATTR_WIDE; break; } ldata = scrlineptr(term->curs.y); check_line_size(term, ldata); ldata->lattr = nlattr; } break; /* GZD4: G0 designate 94-set */ case ANSI('A', '('): compatibility(VT100); if (!term->no_remote_charset) term->cset_attr[0] = CSET_GBCHR; break; case ANSI('B', '('): compatibility(VT100); if (!term->no_remote_charset) term->cset_attr[0] = CSET_ASCII; break; case ANSI('0', '('): compatibility(VT100); if (!term->no_remote_charset) term->cset_attr[0] = CSET_LINEDRW; break; case ANSI('U', '('): compatibility(OTHER); if (!term->no_remote_charset) term->cset_attr[0] = CSET_SCOACS; break; /* G1D4: G1-designate 94-set */ case ANSI('A', ')'): compatibility(VT100); if (!term->no_remote_charset) term->cset_attr[1] = CSET_GBCHR; break; case ANSI('B', ')'): compatibility(VT100); if (!term->no_remote_charset) term->cset_attr[1] = CSET_ASCII; break; case ANSI('0', ')'): compatibility(VT100); if (!term->no_remote_charset) term->cset_attr[1] = CSET_LINEDRW; break; case ANSI('U', ')'): compatibility(OTHER); if (!term->no_remote_charset) term->cset_attr[1] = CSET_SCOACS; break; /* DOCS: Designate other coding system */ case ANSI('8', '%'): /* Old Linux code */ case ANSI('G', '%'): compatibility(OTHER); if (!term->no_remote_charset) term->utf = 1; break; case ANSI('@', '%'): compatibility(OTHER); if (!term->no_remote_charset) term->utf = 0; break; } break; case SEEN_CSI: term->termstate = TOPLEVEL; /* default */ if (isdigit(c)) { if (term->esc_nargs <= ARGS_MAX) { if (term->esc_args[term->esc_nargs - 1] == ARG_DEFAULT) term->esc_args[term->esc_nargs - 1] = 0; if (term->esc_args[term->esc_nargs - 1] <= UINT_MAX / 10 && term->esc_args[term->esc_nargs - 1] * 10 <= UINT_MAX - c - '0') term->esc_args[term->esc_nargs - 1] = 10 * term->esc_args[term->esc_nargs - 1] + c - '0'; else term->esc_args[term->esc_nargs - 1] = UINT_MAX; } term->termstate = SEEN_CSI; } else if (c == ';') { if (term->esc_nargs < ARGS_MAX) term->esc_args[term->esc_nargs++] = ARG_DEFAULT; term->termstate = SEEN_CSI; } else if (c < '@') { if (term->esc_query) term->esc_query = -1; else if (c == '?') term->esc_query = TRUE; else term->esc_query = c; term->termstate = SEEN_CSI; } else #define CLAMP(arg, lim) ((arg) = ((arg) > (lim)) ? (lim) : (arg)) switch (ANSI(c, term->esc_query)) { case 'A': /* CUU: move up N lines */ CLAMP(term->esc_args[0], term->rows); move(term, term->curs.x, term->curs.y - def(term->esc_args[0], 1), 1); seen_disp_event(term); break; case 'e': /* VPR: move down N lines */ compatibility(ANSI); /* FALLTHROUGH */ case 'B': /* CUD: Cursor down */ CLAMP(term->esc_args[0], term->rows); move(term, term->curs.x, term->curs.y + def(term->esc_args[0], 1), 1); seen_disp_event(term); break; case ANSI('c', '>'): /* DA: report xterm version */ compatibility(OTHER); /* this reports xterm version 136 so that VIM can use the drag messages from the mouse reporting */ if (term->ldisc) ldisc_send(term->ldisc, "\033[>0;136;0c", 11, 0); break; case 'a': /* HPR: move right N cols */ compatibility(ANSI); /* FALLTHROUGH */ case 'C': /* CUF: Cursor right */ CLAMP(term->esc_args[0], term->cols); move(term, term->curs.x + def(term->esc_args[0], 1), term->curs.y, 1); seen_disp_event(term); break; case 'D': /* CUB: move left N cols */ CLAMP(term->esc_args[0], term->cols); move(term, term->curs.x - def(term->esc_args[0], 1), term->curs.y, 1); seen_disp_event(term); break; case 'E': /* CNL: move down N lines and CR */ compatibility(ANSI); CLAMP(term->esc_args[0], term->rows); move(term, 0, term->curs.y + def(term->esc_args[0], 1), 1); seen_disp_event(term); break; case 'F': /* CPL: move up N lines and CR */ compatibility(ANSI); CLAMP(term->esc_args[0], term->rows); move(term, 0, term->curs.y - def(term->esc_args[0], 1), 1); seen_disp_event(term); break; case 'G': /* CHA */ case '`': /* HPA: set horizontal posn */ compatibility(ANSI); CLAMP(term->esc_args[0], term->cols); move(term, def(term->esc_args[0], 1) - 1, term->curs.y, 0); seen_disp_event(term); break; case 'd': /* VPA: set vertical posn */ compatibility(ANSI); CLAMP(term->esc_args[0], term->rows); move(term, term->curs.x, ((term->dec_om ? term->marg_t : 0) + def(term->esc_args[0], 1) - 1), (term->dec_om ? 2 : 0)); seen_disp_event(term); break; case 'H': /* CUP */ case 'f': /* HVP: set horz and vert posns at once */ if (term->esc_nargs < 2) term->esc_args[1] = ARG_DEFAULT; CLAMP(term->esc_args[0], term->rows); CLAMP(term->esc_args[1], term->cols); move(term, def(term->esc_args[1], 1) - 1, ((term->dec_om ? term->marg_t : 0) + def(term->esc_args[0], 1) - 1), (term->dec_om ? 2 : 0)); seen_disp_event(term); break; case 'J': /* ED: erase screen or parts of it */ { unsigned int i = def(term->esc_args[0], 0); if (i == 3) { /* Erase Saved Lines (xterm) * This follows Thomas Dickey's xterm. */ if (!term->no_remote_clearscroll) term_clrsb(term); } else { i++; if (i > 3) i = 0; erase_lots(term, FALSE, !!(i & 2), !!(i & 1)); } } if (term->scroll_on_disp) term->disptop = 0; seen_disp_event(term); break; case 'K': /* EL: erase line or parts of it */ { unsigned int i = def(term->esc_args[0], 0) + 1; if (i > 3) i = 0; erase_lots(term, TRUE, !!(i & 2), !!(i & 1)); } seen_disp_event(term); break; case 'L': /* IL: insert lines */ compatibility(VT102); CLAMP(term->esc_args[0], term->rows); if (term->curs.y <= term->marg_b) scroll(term, term->curs.y, term->marg_b, -def(term->esc_args[0], 1), FALSE); seen_disp_event(term); break; case 'M': /* DL: delete lines */ compatibility(VT102); CLAMP(term->esc_args[0], term->rows); if (term->curs.y <= term->marg_b) scroll(term, term->curs.y, term->marg_b, def(term->esc_args[0], 1), TRUE); seen_disp_event(term); break; case '@': /* ICH: insert chars */ /* XXX VTTEST says this is vt220, vt510 manual says vt102 */ compatibility(VT102); CLAMP(term->esc_args[0], term->cols); insch(term, def(term->esc_args[0], 1)); seen_disp_event(term); break; case 'P': /* DCH: delete chars */ compatibility(VT102); CLAMP(term->esc_args[0], term->cols); insch(term, -def(term->esc_args[0], 1)); seen_disp_event(term); break; case 'c': /* DA: terminal type query */ compatibility(VT100); /* This is the response for a VT102 */ if (term->ldisc && term->id_string[0]) ldisc_send(term->ldisc, term->id_string, strlen(term->id_string), 0); break; case 'n': /* DSR: cursor position query */ if (term->ldisc) { if (term->esc_args[0] == 6) { char buf[32]; sprintf(buf, "\033[%d;%dR", term->curs.y + 1, term->curs.x + 1); ldisc_send(term->ldisc, buf, strlen(buf), 0); } else if (term->esc_args[0] == 5) { ldisc_send(term->ldisc, "\033[0n", 4, 0); } } break; case 'h': /* SM: toggle modes to high */ case ANSI_QUE('h'): compatibility(VT100); { int i; for (i = 0; i < term->esc_nargs; i++) toggle_mode(term, term->esc_args[i], term->esc_query, TRUE); } break; case 'i': /* MC: Media copy */ case ANSI_QUE('i'): compatibility(VT100); { char *printer; if (term->esc_nargs != 1) break; if (term->esc_args[0] == 5 && (printer = conf_get_str(term->conf, CONF_printer))[0]) { term->printing = TRUE; term->only_printing = !term->esc_query; term->print_state = 0; term_print_setup(term, printer); } else if (term->esc_args[0] == 4 && term->printing) { term_print_finish(term); } } break; case 'l': /* RM: toggle modes to low */ case ANSI_QUE('l'): compatibility(VT100); { int i; for (i = 0; i < term->esc_nargs; i++) toggle_mode(term, term->esc_args[i], term->esc_query, FALSE); } break; case 'g': /* TBC: clear tabs */ compatibility(VT100); if (term->esc_nargs == 1) { if (term->esc_args[0] == 0) { term->tabs[term->curs.x] = FALSE; } else if (term->esc_args[0] == 3) { int i; for (i = 0; i < term->cols; i++) term->tabs[i] = FALSE; } } break; case 'r': /* DECSTBM: set scroll margins */ compatibility(VT100); if (term->esc_nargs <= 2) { int top, bot; CLAMP(term->esc_args[0], term->rows); CLAMP(term->esc_args[1], term->rows); top = def(term->esc_args[0], 1) - 1; bot = (term->esc_nargs <= 1 || term->esc_args[1] == 0 ? term->rows : def(term->esc_args[1], term->rows)) - 1; if (bot >= term->rows) bot = term->rows - 1; /* VTTEST Bug 9 - if region is less than 2 lines * don't change region. */ if (bot - top > 0) { term->marg_t = top; term->marg_b = bot; term->curs.x = 0; /* * I used to think the cursor should be * placed at the top of the newly marginned * area. Apparently not: VMS TPU falls over * if so. * * Well actually it should for * Origin mode - RDB */ term->curs.y = (term->dec_om ? term->marg_t : 0); seen_disp_event(term); } } break; case 'm': /* SGR: set graphics rendition */ { /* * A VT100 without the AVO only had one * attribute, either underline or * reverse video depending on the * cursor type, this was selected by * CSI 7m. * * case 2: * This is sometimes DIM, eg on the * GIGI and Linux * case 8: * This is sometimes INVIS various ANSI. * case 21: * This like 22 disables BOLD, DIM and INVIS * * The ANSI colours appear on any * terminal that has colour (obviously) * but the interaction between sgr0 and * the colours varies but is usually * related to the background colour * erase item. The interaction between * colour attributes and the mono ones * is also very implementation * dependent. * * The 39 and 49 attributes are likely * to be unimplemented. */ int i; for (i = 0; i < term->esc_nargs; i++) { switch (def(term->esc_args[i], 0)) { case 0: /* restore defaults */ term->curr_attr = term->default_attr; term->curr_truecolour = term->basic_erase_char.truecolour; break; case 1: /* enable bold */ compatibility(VT100AVO); term->curr_attr |= ATTR_BOLD; break; case 2: /* enable dim */ compatibility(OTHER); term->curr_attr |= ATTR_DIM; break; case 21: /* (enable double underline) */ compatibility(OTHER); case 4: /* enable underline */ compatibility(VT100AVO); term->curr_attr |= ATTR_UNDER; break; case 5: /* enable blink */ compatibility(VT100AVO); term->curr_attr |= ATTR_BLINK; break; case 6: /* SCO light bkgrd */ compatibility(SCOANSI); term->blink_is_real = FALSE; term->curr_attr |= ATTR_BLINK; term_schedule_tblink(term); break; case 7: /* enable reverse video */ term->curr_attr |= ATTR_REVERSE; break; case 10: /* SCO acs off */ compatibility(SCOANSI); if (term->no_remote_charset) break; term->sco_acs = 0; break; case 11: /* SCO acs on */ compatibility(SCOANSI); if (term->no_remote_charset) break; term->sco_acs = 1; break; case 12: /* SCO acs on, |0x80 */ compatibility(SCOANSI); if (term->no_remote_charset) break; term->sco_acs = 2; break; case 22: /* disable bold and dim */ compatibility2(OTHER, VT220); term->curr_attr &= ~(ATTR_BOLD | ATTR_DIM); break; case 24: /* disable underline */ compatibility2(OTHER, VT220); term->curr_attr &= ~ATTR_UNDER; break; case 25: /* disable blink */ compatibility2(OTHER, VT220); term->curr_attr &= ~ATTR_BLINK; break; case 27: /* disable reverse video */ compatibility2(OTHER, VT220); term->curr_attr &= ~ATTR_REVERSE; break; case 30: case 31: case 32: case 33: case 34: case 35: case 36: case 37: /* foreground */ term->curr_truecolour.fg.enabled = FALSE; term->curr_attr &= ~ATTR_FGMASK; term->curr_attr |= (term->esc_args[i] - 30)<curr_truecolour.fg.enabled = FALSE; term->curr_attr &= ~ATTR_FGMASK; term->curr_attr |= ((term->esc_args[i] - 90 + 8) << ATTR_FGSHIFT); break; case 39: /* default-foreground */ term->curr_truecolour.fg.enabled = FALSE; term->curr_attr &= ~ATTR_FGMASK; term->curr_attr |= ATTR_DEFFG; break; case 40: case 41: case 42: case 43: case 44: case 45: case 46: case 47: /* background */ term->curr_truecolour.bg.enabled = FALSE; term->curr_attr &= ~ATTR_BGMASK; term->curr_attr |= (term->esc_args[i] - 40)<curr_truecolour.bg.enabled = FALSE; term->curr_attr &= ~ATTR_BGMASK; term->curr_attr |= ((term->esc_args[i] - 100 + 8) << ATTR_BGSHIFT); break; case 49: /* default-background */ term->curr_truecolour.bg.enabled = FALSE; term->curr_attr &= ~ATTR_BGMASK; term->curr_attr |= ATTR_DEFBG; break; /* * 256-colour and true-colour * sequences. A 256-colour * foreground is selected by a * sequence of 3 arguments in the * form 38;5;n, where n is in the * range 0-255. A true-colour RGB * triple is selected by 5 args of * the form 38;2;r;g;b. Replacing * the initial 38 with 48 in both * cases selects the same colour * as the background. */ case 38: if (i+2 < term->esc_nargs && term->esc_args[i+1] == 5) { term->curr_attr &= ~ATTR_FGMASK; term->curr_attr |= ((term->esc_args[i+2] & 0xFF) << ATTR_FGSHIFT); term->curr_truecolour.fg = optionalrgb_none; i += 2; } if (i + 4 < term->esc_nargs && term->esc_args[i + 1] == 2) { parse_optionalrgb( &term->curr_truecolour.fg, term->esc_args + (i+2)); i += 4; } break; case 48: if (i+2 < term->esc_nargs && term->esc_args[i+1] == 5) { term->curr_attr &= ~ATTR_BGMASK; term->curr_attr |= ((term->esc_args[i+2] & 0xFF) << ATTR_BGSHIFT); term->curr_truecolour.bg = optionalrgb_none; i += 2; } if (i + 4 < term->esc_nargs && term->esc_args[i+1] == 2) { parse_optionalrgb( &term->curr_truecolour.bg, term->esc_args + (i+2)); i += 4; } break; } } set_erase_char(term); } break; case 's': /* save cursor */ save_cursor(term, TRUE); break; case 'u': /* restore cursor */ save_cursor(term, FALSE); seen_disp_event(term); break; case 't': /* DECSLPP: set page size - ie window height */ /* * VT340/VT420 sequence DECSLPP, DEC only allows values * 24/25/36/48/72/144 other emulators (eg dtterm) use * illegal values (eg first arg 1..9) for window changing * and reports. */ if (term->esc_nargs <= 1 && (term->esc_args[0] < 1 || term->esc_args[0] >= 24)) { compatibility(VT340TEXT); if (!term->no_remote_resize) request_resize(term->frontend, term->cols, def(term->esc_args[0], 24)); deselect(term); } else if (term->esc_nargs >= 1 && term->esc_args[0] >= 1 && term->esc_args[0] < 24) { compatibility(OTHER); switch (term->esc_args[0]) { int x, y, len; char buf[80]; const char *p; case 1: set_iconic(term->frontend, FALSE); break; case 2: set_iconic(term->frontend, TRUE); break; case 3: if (term->esc_nargs >= 3) { if (!term->no_remote_resize) move_window(term->frontend, def(term->esc_args[1], 0), def(term->esc_args[2], 0)); } break; case 4: /* We should resize the window to a given * size in pixels here, but currently our * resizing code isn't healthy enough to * manage it. */ break; case 5: /* move to top */ set_zorder(term->frontend, TRUE); break; case 6: /* move to bottom */ set_zorder(term->frontend, FALSE); break; case 7: refresh_window(term->frontend); break; case 8: if (term->esc_nargs >= 3) { if (!term->no_remote_resize) request_resize(term->frontend, def(term->esc_args[2], term->conf_width), def(term->esc_args[1], term->conf_height)); } break; case 9: if (term->esc_nargs >= 2) set_zoomed(term->frontend, term->esc_args[1] ? TRUE : FALSE); break; case 11: if (term->ldisc) ldisc_send(term->ldisc, is_iconic(term->frontend) ? "\033[2t" : "\033[1t", 4, 0); break; case 13: if (term->ldisc) { get_window_pos(term->frontend, &x, &y); len = sprintf(buf, "\033[3;%u;%ut", (unsigned)x, (unsigned)y); ldisc_send(term->ldisc, buf, len, 0); } break; case 14: if (term->ldisc) { get_window_pixels(term->frontend, &x, &y); len = sprintf(buf, "\033[4;%d;%dt", y, x); ldisc_send(term->ldisc, buf, len, 0); } break; case 18: if (term->ldisc) { len = sprintf(buf, "\033[8;%d;%dt", term->rows, term->cols); ldisc_send(term->ldisc, buf, len, 0); } break; case 19: /* * Hmmm. Strictly speaking we * should return `the size of the * screen in characters', but * that's not easy: (a) window * furniture being what it is it's * hard to compute, and (b) in * resize-font mode maximising the * window wouldn't change the * number of characters. *shrug*. I * think we'll ignore it for the * moment and see if anyone * complains, and then ask them * what they would like it to do. */ break; case 20: if (term->ldisc && term->remote_qtitle_action != TITLE_NONE) { if(term->remote_qtitle_action == TITLE_REAL) p = get_window_title(term->frontend, TRUE); else p = EMPTY_WINDOW_TITLE; len = strlen(p); ldisc_send(term->ldisc, "\033]L", 3, 0); if (len > 0) ldisc_send(term->ldisc, p, len, 0); ldisc_send(term->ldisc, "\033\\", 2, 0); } break; case 21: if (term->ldisc && term->remote_qtitle_action != TITLE_NONE) { if(term->remote_qtitle_action == TITLE_REAL) p = get_window_title(term->frontend, FALSE); else p = EMPTY_WINDOW_TITLE; len = strlen(p); ldisc_send(term->ldisc, "\033]l", 3, 0); if (len > 0) ldisc_send(term->ldisc, p, len, 0); ldisc_send(term->ldisc, "\033\\", 2, 0); } break; } } break; case 'S': /* SU: Scroll up */ CLAMP(term->esc_args[0], term->rows); compatibility(SCOANSI); scroll(term, term->marg_t, term->marg_b, def(term->esc_args[0], 1), TRUE); term->wrapnext = FALSE; seen_disp_event(term); break; case 'T': /* SD: Scroll down */ CLAMP(term->esc_args[0], term->rows); compatibility(SCOANSI); scroll(term, term->marg_t, term->marg_b, -def(term->esc_args[0], 1), TRUE); term->wrapnext = FALSE; seen_disp_event(term); break; case ANSI('|', '*'): /* DECSNLS */ /* * Set number of lines on screen * VT420 uses VGA like hardware and can * support any size in reasonable range * (24..49 AIUI) with no default specified. */ compatibility(VT420); if (term->esc_nargs == 1 && term->esc_args[0] > 0) { if (!term->no_remote_resize) request_resize(term->frontend, term->cols, def(term->esc_args[0], term->conf_height)); deselect(term); } break; case ANSI('|', '$'): /* DECSCPP */ /* * Set number of columns per page * Docs imply range is only 80 or 132, but * I'll allow any. */ compatibility(VT340TEXT); if (term->esc_nargs <= 1) { if (!term->no_remote_resize) request_resize(term->frontend, def(term->esc_args[0], term->conf_width), term->rows); deselect(term); } break; case 'X': /* ECH: write N spaces w/o moving cursor */ /* XXX VTTEST says this is vt220, vt510 manual * says vt100 */ compatibility(ANSIMIN); CLAMP(term->esc_args[0], term->cols); { int n = def(term->esc_args[0], 1); pos cursplus; int p = term->curs.x; termline *cline = scrlineptr(term->curs.y); if (n > term->cols - term->curs.x) n = term->cols - term->curs.x; cursplus = term->curs; cursplus.x += n; check_boundary(term, term->curs.x, term->curs.y); check_boundary(term, term->curs.x+n, term->curs.y); check_selection(term, term->curs, cursplus); while (n--) copy_termchar(cline, p++, &term->erase_char); seen_disp_event(term); } break; case 'x': /* DECREQTPARM: report terminal characteristics */ compatibility(VT100); if (term->ldisc) { char buf[32]; int i = def(term->esc_args[0], 0); if (i == 0 || i == 1) { strcpy(buf, "\033[2;1;1;112;112;1;0x"); buf[2] += i; ldisc_send(term->ldisc, buf, 20, 0); } } break; case 'Z': /* CBT */ compatibility(OTHER); CLAMP(term->esc_args[0], term->cols); { int i = def(term->esc_args[0], 1); pos old_curs = term->curs; for(;i>0 && term->curs.x>0; i--) { do { term->curs.x--; } while (term->curs.x >0 && !term->tabs[term->curs.x]); } check_selection(term, old_curs, term->curs); } break; case ANSI('c', '='): /* Hide or Show Cursor */ compatibility(SCOANSI); switch(term->esc_args[0]) { case 0: /* hide cursor */ term->cursor_on = FALSE; break; case 1: /* restore cursor */ term->big_cursor = FALSE; term->cursor_on = TRUE; break; case 2: /* block cursor */ term->big_cursor = TRUE; term->cursor_on = TRUE; break; } break; case ANSI('C', '='): /* * set cursor start on scanline esc_args[0] and * end on scanline esc_args[1].If you set * the bottom scan line to a value less than * the top scan line, the cursor will disappear. */ compatibility(SCOANSI); if (term->esc_nargs >= 2) { if (term->esc_args[0] > term->esc_args[1]) term->cursor_on = FALSE; else term->cursor_on = TRUE; } break; case ANSI('D', '='): compatibility(SCOANSI); term->blink_is_real = FALSE; term_schedule_tblink(term); if (term->esc_args[0]>=1) term->curr_attr |= ATTR_BLINK; else term->curr_attr &= ~ATTR_BLINK; break; case ANSI('E', '='): compatibility(SCOANSI); term->blink_is_real = (term->esc_args[0] >= 1); term_schedule_tblink(term); break; case ANSI('F', '='): /* set normal foreground */ compatibility(SCOANSI); if (term->esc_args[0] < 16) { long colour = (sco2ansicolour[term->esc_args[0] & 0x7] | (term->esc_args[0] & 0x8)) << ATTR_FGSHIFT; term->curr_attr &= ~ATTR_FGMASK; term->curr_attr |= colour; term->curr_truecolour.fg = optionalrgb_none; term->default_attr &= ~ATTR_FGMASK; term->default_attr |= colour; set_erase_char(term); } break; case ANSI('G', '='): /* set normal background */ compatibility(SCOANSI); if (term->esc_args[0] < 16) { long colour = (sco2ansicolour[term->esc_args[0] & 0x7] | (term->esc_args[0] & 0x8)) << ATTR_BGSHIFT; term->curr_attr &= ~ATTR_BGMASK; term->curr_attr |= colour; term->curr_truecolour.bg = optionalrgb_none; term->default_attr &= ~ATTR_BGMASK; term->default_attr |= colour; set_erase_char(term); } break; case ANSI('L', '='): compatibility(SCOANSI); term->use_bce = (term->esc_args[0] <= 0); set_erase_char(term); break; case ANSI('p', '"'): /* DECSCL: set compat level */ /* * Allow the host to make this emulator a * 'perfect' VT102. This first appeared in * the VT220, but we do need to get back to * PuTTY mode so I won't check it. * * The arg in 40..42,50 are a PuTTY extension. * The 2nd arg, 8bit vs 7bit is not checked. * * Setting VT102 mode should also change * the Fkeys to generate PF* codes as a * real VT102 has no Fkeys. The VT220 does * this, F11..F13 become ESC,BS,LF other * Fkeys send nothing. * * Note ESC c will NOT change this! */ switch (term->esc_args[0]) { case 61: term->compatibility_level &= ~TM_VTXXX; term->compatibility_level |= TM_VT102; break; case 62: term->compatibility_level &= ~TM_VTXXX; term->compatibility_level |= TM_VT220; break; default: if (term->esc_args[0] > 60 && term->esc_args[0] < 70) term->compatibility_level |= TM_VTXXX; break; case 40: term->compatibility_level &= TM_VTXXX; break; case 41: term->compatibility_level = TM_PUTTY; break; case 42: term->compatibility_level = TM_SCOANSI; break; case ARG_DEFAULT: term->compatibility_level = TM_PUTTY; break; case 50: break; } /* Change the response to CSI c */ if (term->esc_args[0] == 50) { int i; char lbuf[64]; strcpy(term->id_string, "\033[?"); for (i = 1; i < term->esc_nargs; i++) { if (i != 1) strcat(term->id_string, ";"); sprintf(lbuf, "%u", term->esc_args[i]); strcat(term->id_string, lbuf); } strcat(term->id_string, "c"); } #if 0 /* Is this a good idea ? * Well we should do a soft reset at this point ... */ if (!has_compat(VT420) && has_compat(VT100)) { if (!term->no_remote_resize) { if (term->reset_132) request_resize(132, 24); else request_resize(80, 24); } } #endif break; } break; case SEEN_OSC: term->osc_w = FALSE; switch (c) { case 'P': /* Linux palette sequence */ term->termstate = SEEN_OSC_P; term->osc_strlen = 0; break; case 'R': /* Linux palette reset */ palette_reset(term->frontend); term_invalidate(term); term->termstate = TOPLEVEL; break; case 'W': /* word-set */ term->termstate = SEEN_OSC_W; term->osc_w = TRUE; break; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': if (term->esc_args[term->esc_nargs-1] <= UINT_MAX / 10 && term->esc_args[term->esc_nargs-1] * 10 <= UINT_MAX - c - '0') term->esc_args[term->esc_nargs-1] = 10 * term->esc_args[term->esc_nargs-1] + c - '0'; else term->esc_args[term->esc_nargs-1] = UINT_MAX; break; default: /* * _Most_ other characters here terminate the * immediate parsing of the OSC sequence and go * into OSC_STRING state, but we deal with a * couple of exceptions first. */ if (c == 'L' && term->esc_args[0] == 2) { /* * Grotty hack to support xterm and DECterm title * sequences concurrently. */ term->esc_args[0] = 1; } else if (c == ';' && term->esc_nargs == 1 && term->esc_args[0] == 4) { /* * xterm's OSC 4 sequence to query the current * RGB value of a colour takes a second * numeric argument which is easiest to parse * using the existing system rather than in * do_osc. */ term->esc_args[term->esc_nargs++] = 0; } else { term->termstate = OSC_STRING; term->osc_strlen = 0; } } break; case OSC_STRING: /* * This OSC stuff is EVIL. It takes just one character to get into * sysline mode and it's not initially obvious how to get out. * So I've added CR and LF as string aborts. * This shouldn't effect compatibility as I believe embedded * control characters are supposed to be interpreted (maybe?) * and they don't display anything useful anyway. * * -- RDB */ if (c == '\012' || c == '\015') { term->termstate = TOPLEVEL; } else if (c == 0234 || c == '\007') { /* * These characters terminate the string; ST and BEL * terminate the sequence and trigger instant * processing of it, whereas ESC goes back to SEEN_ESC * mode unless it is followed by \, in which case it is * synonymous with ST in the first place. */ do_osc(term); term->termstate = TOPLEVEL; } else if (c == '\033') term->termstate = OSC_MAYBE_ST; else if (term->osc_strlen < OSC_STR_MAX) term->osc_string[term->osc_strlen++] = (char)c; break; case SEEN_OSC_P: { int max = (term->osc_strlen == 0 ? 21 : 15); int val; if ((int)c >= '0' && (int)c <= '9') val = c - '0'; else if ((int)c >= 'A' && (int)c <= 'A' + max - 10) val = c - 'A' + 10; else if ((int)c >= 'a' && (int)c <= 'a' + max - 10) val = c - 'a' + 10; else { term->termstate = TOPLEVEL; break; } term->osc_string[term->osc_strlen++] = val; if (term->osc_strlen >= 7) { palette_set(term->frontend, term->osc_string[0], term->osc_string[1] * 16 + term->osc_string[2], term->osc_string[3] * 16 + term->osc_string[4], term->osc_string[5] * 16 + term->osc_string[6]); term_invalidate(term); term->termstate = TOPLEVEL; } } break; case SEEN_OSC_W: switch (c) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': if (term->esc_args[0] <= UINT_MAX / 10 && term->esc_args[0] * 10 <= UINT_MAX - c - '0') term->esc_args[0] = 10 * term->esc_args[0] + c - '0'; else term->esc_args[0] = UINT_MAX; break; default: term->termstate = OSC_STRING; term->osc_strlen = 0; } break; case VT52_ESC: term->termstate = TOPLEVEL; seen_disp_event(term); switch (c) { case 'A': move(term, term->curs.x, term->curs.y - 1, 1); break; case 'B': move(term, term->curs.x, term->curs.y + 1, 1); break; case 'C': move(term, term->curs.x + 1, term->curs.y, 1); break; case 'D': move(term, term->curs.x - 1, term->curs.y, 1); break; /* * From the VT100 Manual * NOTE: The special graphics characters in the VT100 * are different from those in the VT52 * * From VT102 manual: * 137 _ Blank - Same * 140 ` Reserved - Humm. * 141 a Solid rectangle - Similar * 142 b 1/ - Top half of fraction for the * 143 c 3/ - subscript numbers below. * 144 d 5/ * 145 e 7/ * 146 f Degrees - Same * 147 g Plus or minus - Same * 150 h Right arrow * 151 i Ellipsis (dots) * 152 j Divide by * 153 k Down arrow * 154 l Bar at scan 0 * 155 m Bar at scan 1 * 156 n Bar at scan 2 * 157 o Bar at scan 3 - Similar * 160 p Bar at scan 4 - Similar * 161 q Bar at scan 5 - Similar * 162 r Bar at scan 6 - Same * 163 s Bar at scan 7 - Similar * 164 t Subscript 0 * 165 u Subscript 1 * 166 v Subscript 2 * 167 w Subscript 3 * 170 x Subscript 4 * 171 y Subscript 5 * 172 z Subscript 6 * 173 { Subscript 7 * 174 | Subscript 8 * 175 } Subscript 9 * 176 ~ Paragraph * */ case 'F': term->cset_attr[term->cset = 0] = CSET_LINEDRW; break; case 'G': term->cset_attr[term->cset = 0] = CSET_ASCII; break; case 'H': move(term, 0, 0, 0); break; case 'I': if (term->curs.y == 0) scroll(term, 0, term->rows - 1, -1, TRUE); else if (term->curs.y > 0) term->curs.y--; term->wrapnext = FALSE; break; case 'J': erase_lots(term, FALSE, FALSE, TRUE); if (term->scroll_on_disp) term->disptop = 0; break; case 'K': erase_lots(term, TRUE, FALSE, TRUE); break; #if 0 case 'V': /* XXX Print cursor line */ break; case 'W': /* XXX Start controller mode */ break; case 'X': /* XXX Stop controller mode */ break; #endif case 'Y': term->termstate = VT52_Y1; break; case 'Z': if (term->ldisc) ldisc_send(term->ldisc, "\033/Z", 3, 0); break; case '=': term->app_keypad_keys = TRUE; break; case '>': term->app_keypad_keys = FALSE; break; case '<': /* XXX This should switch to VT100 mode not current or default * VT mode. But this will only have effect in a VT220+ * emulation. */ term->vt52_mode = FALSE; term->blink_is_real = term->blinktext; term_schedule_tblink(term); break; #if 0 case '^': /* XXX Enter auto print mode */ break; case '_': /* XXX Exit auto print mode */ break; case ']': /* XXX Print screen */ break; #endif #ifdef VT52_PLUS case 'E': /* compatibility(ATARI) */ move(term, 0, 0, 0); erase_lots(term, FALSE, FALSE, TRUE); if (term->scroll_on_disp) term->disptop = 0; break; case 'L': /* compatibility(ATARI) */ if (term->curs.y <= term->marg_b) scroll(term, term->curs.y, term->marg_b, -1, FALSE); break; case 'M': /* compatibility(ATARI) */ if (term->curs.y <= term->marg_b) scroll(term, term->curs.y, term->marg_b, 1, TRUE); break; case 'b': /* compatibility(ATARI) */ term->termstate = VT52_FG; break; case 'c': /* compatibility(ATARI) */ term->termstate = VT52_BG; break; case 'd': /* compatibility(ATARI) */ erase_lots(term, FALSE, TRUE, FALSE); if (term->scroll_on_disp) term->disptop = 0; break; case 'e': /* compatibility(ATARI) */ term->cursor_on = TRUE; break; case 'f': /* compatibility(ATARI) */ term->cursor_on = FALSE; break; /* case 'j': Save cursor position - broken on ST */ /* case 'k': Restore cursor position */ case 'l': /* compatibility(ATARI) */ erase_lots(term, TRUE, TRUE, TRUE); term->curs.x = 0; term->wrapnext = FALSE; break; case 'o': /* compatibility(ATARI) */ erase_lots(term, TRUE, TRUE, FALSE); break; case 'p': /* compatibility(ATARI) */ term->curr_attr |= ATTR_REVERSE; break; case 'q': /* compatibility(ATARI) */ term->curr_attr &= ~ATTR_REVERSE; break; case 'v': /* wrap Autowrap on - Wyse style */ /* compatibility(ATARI) */ term->wrap = 1; break; case 'w': /* Autowrap off */ /* compatibility(ATARI) */ term->wrap = 0; break; case 'R': /* compatibility(OTHER) */ term->vt52_bold = FALSE; term->curr_attr = ATTR_DEFAULT; term->curr_truecolour.fg = optionalrgb_none; term->curr_truecolour.bg = optionalrgb_none; set_erase_char(term); break; case 'S': /* compatibility(VI50) */ term->curr_attr |= ATTR_UNDER; break; case 'W': /* compatibility(VI50) */ term->curr_attr &= ~ATTR_UNDER; break; case 'U': /* compatibility(VI50) */ term->vt52_bold = TRUE; term->curr_attr |= ATTR_BOLD; break; case 'T': /* compatibility(VI50) */ term->vt52_bold = FALSE; term->curr_attr &= ~ATTR_BOLD; break; #endif } break; case VT52_Y1: term->termstate = VT52_Y2; move(term, term->curs.x, c - ' ', 0); break; case VT52_Y2: term->termstate = TOPLEVEL; move(term, c - ' ', term->curs.y, 0); break; #ifdef VT52_PLUS case VT52_FG: term->termstate = TOPLEVEL; term->curr_attr &= ~ATTR_FGMASK; term->curr_attr &= ~ATTR_BOLD; term->curr_attr |= (c & 0xF) << ATTR_FGSHIFT; set_erase_char(term); break; case VT52_BG: term->termstate = TOPLEVEL; term->curr_attr &= ~ATTR_BGMASK; term->curr_attr &= ~ATTR_BLINK; term->curr_attr |= (c & 0xF) << ATTR_BGSHIFT; set_erase_char(term); break; #endif default: break; /* placate gcc warning about enum use */ } if (term->selstate != NO_SELECTION) { pos cursplus = term->curs; incpos(cursplus); check_selection(term, term->curs, cursplus); } } term_print_flush(term); if (term->logflush && term->logctx) logflush(term->logctx); } /* * Small subroutine to parse three consecutive escape-sequence * arguments representing a true-colour RGB triple into an * optionalrgb. */ static void parse_optionalrgb(optionalrgb *out, unsigned *values) { out->enabled = TRUE; out->r = values[0] < 256 ? values[0] : 0; out->g = values[1] < 256 ? values[1] : 0; out->b = values[2] < 256 ? values[2] : 0; } /* * To prevent having to run the reasonably tricky bidi algorithm * too many times, we maintain a cache of the last lineful of data * fed to the algorithm on each line of the display. */ static int term_bidi_cache_hit(Terminal *term, int line, termchar *lbefore, int width) { int i; if (!term->pre_bidi_cache) return FALSE; /* cache doesn't even exist yet! */ if (line >= term->bidi_cache_size) return FALSE; /* cache doesn't have this many lines */ if (!term->pre_bidi_cache[line].chars) return FALSE; /* cache doesn't contain _this_ line */ if (term->pre_bidi_cache[line].width != width) return FALSE; /* line is wrong width */ for (i = 0; i < width; i++) if (!termchars_equal(term->pre_bidi_cache[line].chars+i, lbefore+i)) return FALSE; /* line doesn't match cache */ return TRUE; /* it didn't match. */ } static void term_bidi_cache_store(Terminal *term, int line, termchar *lbefore, termchar *lafter, bidi_char *wcTo, int width, int size) { int i; if (!term->pre_bidi_cache || term->bidi_cache_size <= line) { int j = term->bidi_cache_size; term->bidi_cache_size = line+1; term->pre_bidi_cache = sresize(term->pre_bidi_cache, term->bidi_cache_size, struct bidi_cache_entry); term->post_bidi_cache = sresize(term->post_bidi_cache, term->bidi_cache_size, struct bidi_cache_entry); while (j < term->bidi_cache_size) { term->pre_bidi_cache[j].chars = term->post_bidi_cache[j].chars = NULL; term->pre_bidi_cache[j].width = term->post_bidi_cache[j].width = -1; term->pre_bidi_cache[j].forward = term->post_bidi_cache[j].forward = NULL; term->pre_bidi_cache[j].backward = term->post_bidi_cache[j].backward = NULL; j++; } } sfree(term->pre_bidi_cache[line].chars); sfree(term->post_bidi_cache[line].chars); sfree(term->post_bidi_cache[line].forward); sfree(term->post_bidi_cache[line].backward); term->pre_bidi_cache[line].width = width; term->pre_bidi_cache[line].chars = snewn(size, termchar); term->post_bidi_cache[line].width = width; term->post_bidi_cache[line].chars = snewn(size, termchar); term->post_bidi_cache[line].forward = snewn(width, int); term->post_bidi_cache[line].backward = snewn(width, int); memcpy(term->pre_bidi_cache[line].chars, lbefore, size * TSIZE); memcpy(term->post_bidi_cache[line].chars, lafter, size * TSIZE); memset(term->post_bidi_cache[line].forward, 0, width * sizeof(int)); memset(term->post_bidi_cache[line].backward, 0, width * sizeof(int)); for (i = 0; i < width; i++) { int p = wcTo[i].index; assert(0 <= p && p < width); term->post_bidi_cache[line].backward[i] = p; term->post_bidi_cache[line].forward[p] = i; } } /* * Prepare the bidi information for a screen line. Returns the * transformed list of termchars, or NULL if no transformation at * all took place (because bidi is disabled). If return was * non-NULL, auxiliary information such as the forward and reverse * mappings of permutation position are available in * term->post_bidi_cache[scr_y].*. */ static termchar *term_bidi_line(Terminal *term, struct termline *ldata, int scr_y) { termchar *lchars; int it; /* Do Arabic shaping and bidi. */ if(!term->bidi || !term->arabicshaping) { if (!term_bidi_cache_hit(term, scr_y, ldata->chars, term->cols)) { if (term->wcFromTo_size < term->cols) { term->wcFromTo_size = term->cols; term->wcFrom = sresize(term->wcFrom, term->wcFromTo_size, bidi_char); term->wcTo = sresize(term->wcTo, term->wcFromTo_size, bidi_char); } for(it=0; itcols ; it++) { unsigned long uc = (ldata->chars[it].chr); switch (uc & CSET_MASK) { case CSET_LINEDRW: if (!term->rawcnp) { uc = term->ucsdata->unitab_xterm[uc & 0xFF]; break; } case CSET_ASCII: uc = term->ucsdata->unitab_line[uc & 0xFF]; break; case CSET_SCOACS: uc = term->ucsdata->unitab_scoacs[uc&0xFF]; break; } switch (uc & CSET_MASK) { case CSET_ACP: uc = term->ucsdata->unitab_font[uc & 0xFF]; break; case CSET_OEMCP: uc = term->ucsdata->unitab_oemcp[uc & 0xFF]; break; } term->wcFrom[it].origwc = term->wcFrom[it].wc = (unsigned int)uc; term->wcFrom[it].index = it; } if(!term->bidi) do_bidi(term->wcFrom, term->cols); /* this is saved iff done from inside the shaping */ if(!term->bidi && term->arabicshaping) for(it=0; itcols; it++) term->wcTo[it] = term->wcFrom[it]; if(!term->arabicshaping) do_shape(term->wcFrom, term->wcTo, term->cols); if (term->ltemp_size < ldata->size) { term->ltemp_size = ldata->size; term->ltemp = sresize(term->ltemp, term->ltemp_size, termchar); } memcpy(term->ltemp, ldata->chars, ldata->size * TSIZE); for(it=0; itcols ; it++) { term->ltemp[it] = ldata->chars[term->wcTo[it].index]; if (term->ltemp[it].cc_next) term->ltemp[it].cc_next -= it - term->wcTo[it].index; if (term->wcTo[it].origwc != term->wcTo[it].wc) term->ltemp[it].chr = term->wcTo[it].wc; } term_bidi_cache_store(term, scr_y, ldata->chars, term->ltemp, term->wcTo, term->cols, ldata->size); lchars = term->ltemp; } else { lchars = term->post_bidi_cache[scr_y].chars; } } else { lchars = NULL; } return lchars; } /* * Given a context, update the window. Out of paranoia, we don't * allow WM_PAINT responses to do scrolling optimisations. */ static void do_paint(Terminal *term, Context ctx, int may_optimise) { int i, j, our_curs_y, our_curs_x; int rv, cursor; pos scrpos; wchar_t *ch; int chlen; #ifdef OPTIMISE_SCROLL struct scrollregion *sr; #endif /* OPTIMISE_SCROLL */ termchar *newline; chlen = 1024; ch = snewn(chlen, wchar_t); newline = snewn(term->cols, termchar); rv = (!term->rvideo ^ !term->in_vbell ? ATTR_REVERSE : 0); /* Depends on: * screen array, disptop, scrtop, * selection, rv, * blinkpc, blink_is_real, tblinker, * curs.y, curs.x, cblinker, blink_cur, cursor_on, has_focus, wrapnext */ /* Has the cursor position or type changed ? */ if (term->cursor_on) { if (term->has_focus) { if (term->cblinker || !term->blink_cur) cursor = TATTR_ACTCURS; else cursor = 0; } else cursor = TATTR_PASCURS; if (term->wrapnext) cursor |= TATTR_RIGHTCURS; } else cursor = 0; our_curs_y = term->curs.y - term->disptop; { /* * Adjust the cursor position: * - for bidi * - in the case where it's resting on the right-hand half * of a CJK wide character. xterm's behaviour here, * which seems adequate to me, is to display the cursor * covering the _whole_ character, exactly as if it were * one space to the left. */ termline *ldata = lineptr(term->curs.y); termchar *lchars; our_curs_x = term->curs.x; if ( (lchars = term_bidi_line(term, ldata, our_curs_y)) != NULL) { our_curs_x = term->post_bidi_cache[our_curs_y].forward[our_curs_x]; } else lchars = ldata->chars; if (our_curs_x > 0 && lchars[our_curs_x].chr == UCSWIDE) our_curs_x--; unlineptr(ldata); } /* * If the cursor is not where it was last time we painted, and * its previous position is visible on screen, invalidate its * previous position. */ if (term->dispcursy >= 0 && (term->curstype != cursor || term->dispcursy != our_curs_y || term->dispcursx != our_curs_x)) { termchar *dispcurs = term->disptext[term->dispcursy]->chars + term->dispcursx; if (term->dispcursx > 0 && dispcurs->chr == UCSWIDE) dispcurs[-1].attr |= ATTR_INVALID; if (term->dispcursx < term->cols-1 && dispcurs[1].chr == UCSWIDE) dispcurs[1].attr |= ATTR_INVALID; dispcurs->attr |= ATTR_INVALID; term->curstype = 0; } term->dispcursx = term->dispcursy = -1; #ifdef OPTIMISE_SCROLL /* Do scrolls */ sr = term->scrollhead; while (sr) { struct scrollregion *next = sr->next; do_scroll(ctx, sr->topline, sr->botline, sr->lines); sfree(sr); sr = next; } term->scrollhead = term->scrolltail = NULL; #endif /* OPTIMISE_SCROLL */ /* The normal screen data */ for (i = 0; i < term->rows; i++) { termline *ldata; termchar *lchars; int dirty_line, dirty_run, selected; unsigned long attr = 0, cset = 0; int start = 0; int ccount = 0; int last_run_dirty = 0; int laststart, dirtyrect; int *backward; truecolour tc; scrpos.y = i + term->disptop; ldata = lineptr(scrpos.y); /* Do Arabic shaping and bidi. */ lchars = term_bidi_line(term, ldata, i); if (lchars) { backward = term->post_bidi_cache[i].backward; } else { lchars = ldata->chars; backward = NULL; } /* * First loop: work along the line deciding what we want * each character cell to look like. */ for (j = 0; j < term->cols; j++) { unsigned long tattr, tchar; termchar *d = lchars + j; scrpos.x = backward ? backward[j] : j; tchar = d->chr; tattr = d->attr; if (!term->ansi_colour) tattr = (tattr & ~(ATTR_FGMASK | ATTR_BGMASK)) | ATTR_DEFFG | ATTR_DEFBG; if (!term->xterm_256_colour) { int colour; colour = (tattr & ATTR_FGMASK) >> ATTR_FGSHIFT; if (colour >= 16 && colour < 256) tattr = (tattr &~ ATTR_FGMASK) | ATTR_DEFFG; colour = (tattr & ATTR_BGMASK) >> ATTR_BGSHIFT; if (colour >= 16 && colour < 256) tattr = (tattr &~ ATTR_BGMASK) | ATTR_DEFBG; } if (term->true_colour) { tc = d->truecolour; } else { tc.fg = tc.bg = optionalrgb_none; } switch (tchar & CSET_MASK) { case CSET_ASCII: tchar = term->ucsdata->unitab_line[tchar & 0xFF]; break; case CSET_LINEDRW: tchar = term->ucsdata->unitab_xterm[tchar & 0xFF]; break; case CSET_SCOACS: tchar = term->ucsdata->unitab_scoacs[tchar&0xFF]; break; } if (j < term->cols-1 && d[1].chr == UCSWIDE) tattr |= ATTR_WIDE; /* Video reversing things */ if (term->selstate == DRAGGING || term->selstate == SELECTED) { if (term->seltype == LEXICOGRAPHIC) selected = (posle(term->selstart, scrpos) && poslt(scrpos, term->selend)); else selected = (posPle(term->selstart, scrpos) && posPlt(scrpos, term->selend)); } else selected = FALSE; tattr = (tattr ^ rv ^ (selected ? ATTR_REVERSE : 0)); /* 'Real' blinking ? */ if (term->blink_is_real && (tattr & ATTR_BLINK)) { if (term->has_focus && term->tblinker) { tchar = term->ucsdata->unitab_line[(unsigned char)' ']; } tattr &= ~ATTR_BLINK; } /* * Check the font we'll _probably_ be using to see if * the character is wide when we don't want it to be. */ if (tchar != term->disptext[i]->chars[j].chr || tattr != (term->disptext[i]->chars[j].attr &~ (ATTR_NARROW | DATTR_MASK))) { if ((tattr & ATTR_WIDE) == 0 && char_width(ctx, tchar) == 2) tattr |= ATTR_NARROW; } else if (term->disptext[i]->chars[j].attr & ATTR_NARROW) tattr |= ATTR_NARROW; if (i == our_curs_y && j == our_curs_x) { tattr |= cursor; term->curstype = cursor; term->dispcursx = j; term->dispcursy = i; } /* FULL-TERMCHAR */ newline[j].attr = tattr; newline[j].chr = tchar; newline[j].truecolour = tc; /* Combining characters are still read from lchars */ newline[j].cc_next = 0; } /* * Now loop over the line again, noting where things have * changed. * * During this loop, we keep track of where we last saw * DATTR_STARTRUN. Any mismatch automatically invalidates * _all_ of the containing run that was last printed: that * is, any rectangle that was drawn in one go in the * previous update should be either left completely alone * or overwritten in its entirety. This, along with the * expectation that front ends clip all text runs to their * bounding rectangle, should solve any possible problems * with fonts that overflow their character cells. */ laststart = 0; dirtyrect = FALSE; for (j = 0; j < term->cols; j++) { if (term->disptext[i]->chars[j].attr & DATTR_STARTRUN) { laststart = j; dirtyrect = FALSE; } if (term->disptext[i]->chars[j].chr != newline[j].chr || (term->disptext[i]->chars[j].attr &~ DATTR_MASK) != newline[j].attr) { int k; if (!dirtyrect) { for (k = laststart; k < j; k++) term->disptext[i]->chars[k].attr |= ATTR_INVALID; dirtyrect = TRUE; } } if (dirtyrect) term->disptext[i]->chars[j].attr |= ATTR_INVALID; } /* * Finally, loop once more and actually do the drawing. */ dirty_run = dirty_line = (ldata->lattr != term->disptext[i]->lattr); term->disptext[i]->lattr = ldata->lattr; tc = term->erase_char.truecolour; for (j = 0; j < term->cols; j++) { unsigned long tattr, tchar; int break_run, do_copy; termchar *d = lchars + j; tattr = newline[j].attr; tchar = newline[j].chr; if ((term->disptext[i]->chars[j].attr ^ tattr) & ATTR_WIDE) dirty_line = TRUE; break_run = ((tattr ^ attr) & term->attr_mask) != 0; if (!truecolour_equal(newline[j].truecolour, tc)) break_run = TRUE; #ifdef USES_VTLINE_HACK /* Special hack for VT100 Linedraw glyphs */ if ((tchar >= 0x23BA && tchar <= 0x23BD) || (j > 0 && (newline[j-1].chr >= 0x23BA && newline[j-1].chr <= 0x23BD))) break_run = TRUE; #endif /* * Separate out sequences of characters that have the * same CSET, if that CSET is a magic one. */ if (CSET_OF(tchar) != cset) break_run = TRUE; /* * Break on both sides of any combined-character cell. */ if (d->cc_next != 0 || (j > 0 && d[-1].cc_next != 0)) break_run = TRUE; if (!term->ucsdata->dbcs_screenfont && !dirty_line) { if (term->disptext[i]->chars[j].chr == tchar && (term->disptext[i]->chars[j].attr &~ DATTR_MASK) == tattr) break_run = TRUE; else if (!dirty_run && ccount == 1) break_run = TRUE; } if (break_run) { if ((dirty_run || last_run_dirty) && ccount > 0) { do_text(ctx, start, i, ch, ccount, attr, ldata->lattr, tc); if (attr & (TATTR_ACTCURS | TATTR_PASCURS)) do_cursor(ctx, start, i, ch, ccount, attr, ldata->lattr, tc); } start = j; ccount = 0; attr = tattr; tc = newline[j].truecolour; cset = CSET_OF(tchar); if (term->ucsdata->dbcs_screenfont) last_run_dirty = dirty_run; dirty_run = dirty_line; } do_copy = FALSE; if (!termchars_equal_override(&term->disptext[i]->chars[j], d, tchar, tattr)) { do_copy = TRUE; dirty_run = TRUE; } if (ccount+2 > chlen) { chlen = ccount + 256; ch = sresize(ch, chlen, wchar_t); } #ifdef PLATFORM_IS_UTF16 if (tchar > 0x10000 && tchar < 0x110000) { ch[ccount++] = (wchar_t) HIGH_SURROGATE_OF(tchar); ch[ccount++] = (wchar_t) LOW_SURROGATE_OF(tchar); } else #endif /* PLATFORM_IS_UTF16 */ ch[ccount++] = (wchar_t) tchar; if (d->cc_next) { termchar *dd = d; while (dd->cc_next) { unsigned long schar; dd += dd->cc_next; schar = dd->chr; switch (schar & CSET_MASK) { case CSET_ASCII: schar = term->ucsdata->unitab_line[schar & 0xFF]; break; case CSET_LINEDRW: schar = term->ucsdata->unitab_xterm[schar & 0xFF]; break; case CSET_SCOACS: schar = term->ucsdata->unitab_scoacs[schar&0xFF]; break; } if (ccount+2 > chlen) { chlen = ccount + 256; ch = sresize(ch, chlen, wchar_t); } #ifdef PLATFORM_IS_UTF16 if (schar > 0x10000 && schar < 0x110000) { ch[ccount++] = (wchar_t) HIGH_SURROGATE_OF(schar); ch[ccount++] = (wchar_t) LOW_SURROGATE_OF(schar); } else #endif /* PLATFORM_IS_UTF16 */ ch[ccount++] = (wchar_t) schar; } attr |= TATTR_COMBINING; } if (do_copy) { copy_termchar(term->disptext[i], j, d); term->disptext[i]->chars[j].chr = tchar; term->disptext[i]->chars[j].attr = tattr; term->disptext[i]->chars[j].truecolour = tc; if (start == j) term->disptext[i]->chars[j].attr |= DATTR_STARTRUN; } /* If it's a wide char step along to the next one. */ if (tattr & ATTR_WIDE) { if (++j < term->cols) { d++; /* * By construction above, the cursor should not * be on the right-hand half of this character. * Ever. */ assert(!(i == our_curs_y && j == our_curs_x)); if (!termchars_equal(&term->disptext[i]->chars[j], d)) dirty_run = TRUE; copy_termchar(term->disptext[i], j, d); } } } if (dirty_run && ccount > 0) { do_text(ctx, start, i, ch, ccount, attr, ldata->lattr, tc); if (attr & (TATTR_ACTCURS | TATTR_PASCURS)) do_cursor(ctx, start, i, ch, ccount, attr, ldata->lattr, tc); } unlineptr(ldata); } sfree(newline); sfree(ch); } /* * Invalidate the whole screen so it will be repainted in full. */ void term_invalidate(Terminal *term) { int i, j; for (i = 0; i < term->rows; i++) for (j = 0; j < term->cols; j++) term->disptext[i]->chars[j].attr |= ATTR_INVALID; term_schedule_update(term); } /* * Paint the window in response to a WM_PAINT message. */ void term_paint(Terminal *term, Context ctx, int left, int top, int right, int bottom, int immediately) { int i, j; if (left < 0) left = 0; if (top < 0) top = 0; if (right >= term->cols) right = term->cols-1; if (bottom >= term->rows) bottom = term->rows-1; for (i = top; i <= bottom && i < term->rows; i++) { if ((term->disptext[i]->lattr & LATTR_MODE) == LATTR_NORM) for (j = left; j <= right && j < term->cols; j++) term->disptext[i]->chars[j].attr |= ATTR_INVALID; else for (j = left / 2; j <= right / 2 + 1 && j < term->cols; j++) term->disptext[i]->chars[j].attr |= ATTR_INVALID; } if (immediately) { do_paint (term, ctx, FALSE); } else { term_schedule_update(term); } } /* * Attempt to scroll the scrollback. The second parameter gives the * position we want to scroll to; the first is +1 to denote that * this position is relative to the beginning of the scrollback, -1 * to denote it is relative to the end, and 0 to denote that it is * relative to the current position. */ void term_scroll(Terminal *term, int rel, int where) { int sbtop = -sblines(term); #ifdef OPTIMISE_SCROLL int olddisptop = term->disptop; int shift; #endif /* OPTIMISE_SCROLL */ term->disptop = (rel < 0 ? 0 : rel > 0 ? sbtop : term->disptop) + where; if (term->disptop < sbtop) term->disptop = sbtop; if (term->disptop > 0) term->disptop = 0; update_sbar(term); #ifdef OPTIMISE_SCROLL shift = (term->disptop - olddisptop); if (shift < term->rows && shift > -term->rows) scroll_display(term, 0, term->rows - 1, shift); #endif /* OPTIMISE_SCROLL */ term_update(term); } /* * Scroll the scrollback to centre it on the beginning or end of the * current selection, if any. */ void term_scroll_to_selection(Terminal *term, int which_end) { pos target; int y; int sbtop = -sblines(term); if (term->selstate != SELECTED) return; if (which_end) target = term->selend; else target = term->selstart; y = target.y - term->rows/2; if (y < sbtop) y = sbtop; else if (y > 0) y = 0; term_scroll(term, -1, y); } /* * Helper routine for clipme(): growing buffer. */ typedef struct { int buflen; /* amount of allocated space in textbuf/attrbuf */ int bufpos; /* amount of actual data */ wchar_t *textbuf; /* buffer for copied text */ wchar_t *textptr; /* = textbuf + bufpos (current insertion point) */ int *attrbuf; /* buffer for copied attributes */ int *attrptr; /* = attrbuf + bufpos */ truecolour *tcbuf; /* buffer for copied colours */ truecolour *tcptr; /* = tcbuf + bufpos */ } clip_workbuf; static void clip_addchar(clip_workbuf *b, wchar_t chr, int attr, truecolour tc) { if (b->bufpos >= b->buflen) { b->buflen *= 2; b->textbuf = sresize(b->textbuf, b->buflen, wchar_t); b->textptr = b->textbuf + b->bufpos; b->attrbuf = sresize(b->attrbuf, b->buflen, int); b->attrptr = b->attrbuf + b->bufpos; b->tcbuf = sresize(b->tcbuf, b->buflen, truecolour); b->tcptr = b->tcbuf + b->bufpos; } *b->textptr++ = chr; *b->attrptr++ = attr; *b->tcptr++ = tc; b->bufpos++; } static void clipme(Terminal *term, pos top, pos bottom, int rect, int desel, const int *clipboards, int n_clipboards) { clip_workbuf buf; int old_top_x; int attr; truecolour tc; buf.buflen = 5120; buf.bufpos = 0; buf.textptr = buf.textbuf = snewn(buf.buflen, wchar_t); buf.attrptr = buf.attrbuf = snewn(buf.buflen, int); buf.tcptr = buf.tcbuf = snewn(buf.buflen, truecolour); old_top_x = top.x; /* needed for rect==1 */ while (poslt(top, bottom)) { int nl = FALSE; termline *ldata = lineptr(top.y); pos nlpos; /* * nlpos will point at the maximum position on this line we * should copy up to. So we start it at the end of the * line... */ nlpos.y = top.y; nlpos.x = term->cols; /* * ... move it backwards if there's unused space at the end * of the line (and also set `nl' if this is the case, * because in normal selection mode this means we need a * newline at the end)... */ if (!(ldata->lattr & LATTR_WRAPPED)) { while (nlpos.x && IS_SPACE_CHR(ldata->chars[nlpos.x - 1].chr) && !ldata->chars[nlpos.x - 1].cc_next && poslt(top, nlpos)) decpos(nlpos); if (poslt(nlpos, bottom)) nl = TRUE; } else if (ldata->lattr & LATTR_WRAPPED2) { /* Ignore the last char on the line in a WRAPPED2 line. */ decpos(nlpos); } /* * ... and then clip it to the terminal x coordinate if * we're doing rectangular selection. (In this case we * still did the above, so that copying e.g. the right-hand * column from a table doesn't fill with spaces on the * right.) */ if (rect) { if (nlpos.x > bottom.x) nlpos.x = bottom.x; nl = (top.y < bottom.y); } while (poslt(top, bottom) && poslt(top, nlpos)) { #if 0 char cbuf[16], *p; sprintf(cbuf, "", (ldata[top.x] & 0xFFFF)); #else wchar_t cbuf[16], *p; int c; int x = top.x; if (ldata->chars[x].chr == UCSWIDE) { top.x++; continue; } while (1) { int uc = ldata->chars[x].chr; attr = ldata->chars[x].attr; tc = ldata->chars[x].truecolour; switch (uc & CSET_MASK) { case CSET_LINEDRW: if (!term->rawcnp) { uc = term->ucsdata->unitab_xterm[uc & 0xFF]; break; } case CSET_ASCII: uc = term->ucsdata->unitab_line[uc & 0xFF]; break; case CSET_SCOACS: uc = term->ucsdata->unitab_scoacs[uc&0xFF]; break; } switch (uc & CSET_MASK) { case CSET_ACP: uc = term->ucsdata->unitab_font[uc & 0xFF]; break; case CSET_OEMCP: uc = term->ucsdata->unitab_oemcp[uc & 0xFF]; break; } c = (uc & ~CSET_MASK); #ifdef PLATFORM_IS_UTF16 if (uc > 0x10000 && uc < 0x110000) { cbuf[0] = 0xD800 | ((uc - 0x10000) >> 10); cbuf[1] = 0xDC00 | ((uc - 0x10000) & 0x3FF); cbuf[2] = 0; } else #endif { cbuf[0] = uc; cbuf[1] = 0; } if (DIRECT_FONT(uc)) { if (c >= ' ' && c != 0x7F) { char buf[4]; WCHAR wbuf[4]; int rv; if (is_dbcs_leadbyte(term->ucsdata->font_codepage, (BYTE) c)) { buf[0] = c; buf[1] = (char) (0xFF & ldata->chars[top.x + 1].chr); rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 2, wbuf, 4); top.x++; } else { buf[0] = c; rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 1, wbuf, 4); } if (rv > 0) { memcpy(cbuf, wbuf, rv * sizeof(wchar_t)); cbuf[rv] = 0; } } } #endif for (p = cbuf; *p; p++) clip_addchar(&buf, *p, attr, tc); if (ldata->chars[x].cc_next) x += ldata->chars[x].cc_next; else break; } top.x++; } if (nl) { int i; for (i = 0; i < sel_nl_sz; i++) clip_addchar(&buf, sel_nl[i], 0, term->basic_erase_char.truecolour); } top.y++; top.x = rect ? old_top_x : 0; unlineptr(ldata); } #if SELECTION_NUL_TERMINATED clip_addchar(&buf, 0, 0, term->basic_erase_char.truecolour); #endif /* Finally, transfer all that to the clipboard(s). */ { int i; int clip_local = FALSE; for (i = 0; i < n_clipboards; i++) { if (clipboards[i] == CLIP_LOCAL) { clip_local = TRUE; } else if (clipboards[i] != CLIP_NULL) { write_clip(term->frontend, clipboards[i], buf.textbuf, buf.attrbuf, buf.tcbuf, buf.bufpos, desel); } } if (clip_local) { sfree(term->last_selected_text); sfree(term->last_selected_attr); sfree(term->last_selected_tc); term->last_selected_text = buf.textbuf; term->last_selected_attr = buf.attrbuf; term->last_selected_tc = buf.tcbuf; term->last_selected_len = buf.bufpos; } else { sfree(buf.textbuf); sfree(buf.attrbuf); sfree(buf.tcbuf); } } } void term_copyall(Terminal *term, const int *clipboards, int n_clipboards) { pos top; pos bottom; tree234 *screen = term->screen; top.y = -sblines(term); top.x = 0; bottom.y = find_last_nonempty_line(term, screen); bottom.x = term->cols; clipme(term, top, bottom, 0, TRUE, clipboards, n_clipboards); } static void paste_from_clip_local(void *vterm) { Terminal *term = (Terminal *)vterm; term_do_paste(term, term->last_selected_text, term->last_selected_len); } void term_request_copy(Terminal *term, const int *clipboards, int n_clipboards) { int i; for (i = 0; i < n_clipboards; i++) { assert(clipboards[i] != CLIP_LOCAL); if (clipboards[i] != CLIP_NULL) { write_clip(term->frontend, clipboards[i], term->last_selected_text, term->last_selected_attr, term->last_selected_tc, term->last_selected_len, FALSE); } } } void term_request_paste(Terminal *term, int clipboard) { switch (clipboard) { case CLIP_NULL: /* Do nothing: CLIP_NULL never has data in it. */ break; case CLIP_LOCAL: queue_toplevel_callback(paste_from_clip_local, term); break; default: frontend_request_paste(term->frontend, clipboard); break; } } /* * The wordness array is mainly for deciding the disposition of the * US-ASCII characters. */ static int wordtype(Terminal *term, int uc) { struct ucsword { int start, end, ctype; }; static const struct ucsword ucs_words[] = { { 128, 160, 0}, { 161, 191, 1}, { 215, 215, 1}, { 247, 247, 1}, { 0x037e, 0x037e, 1}, /* Greek question mark */ { 0x0387, 0x0387, 1}, /* Greek ano teleia */ { 0x055a, 0x055f, 1}, /* Armenian punctuation */ { 0x0589, 0x0589, 1}, /* Armenian full stop */ { 0x0700, 0x070d, 1}, /* Syriac punctuation */ { 0x104a, 0x104f, 1}, /* Myanmar punctuation */ { 0x10fb, 0x10fb, 1}, /* Georgian punctuation */ { 0x1361, 0x1368, 1}, /* Ethiopic punctuation */ { 0x166d, 0x166e, 1}, /* Canadian Syl. punctuation */ { 0x17d4, 0x17dc, 1}, /* Khmer punctuation */ { 0x1800, 0x180a, 1}, /* Mongolian punctuation */ { 0x2000, 0x200a, 0}, /* Various spaces */ { 0x2070, 0x207f, 2}, /* superscript */ { 0x2080, 0x208f, 2}, /* subscript */ { 0x200b, 0x27ff, 1}, /* punctuation and symbols */ { 0x3000, 0x3000, 0}, /* ideographic space */ { 0x3001, 0x3020, 1}, /* ideographic punctuation */ { 0x303f, 0x309f, 3}, /* Hiragana */ { 0x30a0, 0x30ff, 3}, /* Katakana */ { 0x3300, 0x9fff, 3}, /* CJK Ideographs */ { 0xac00, 0xd7a3, 3}, /* Hangul Syllables */ { 0xf900, 0xfaff, 3}, /* CJK Ideographs */ { 0xfe30, 0xfe6b, 1}, /* punctuation forms */ { 0xff00, 0xff0f, 1}, /* half/fullwidth ASCII */ { 0xff1a, 0xff20, 1}, /* half/fullwidth ASCII */ { 0xff3b, 0xff40, 1}, /* half/fullwidth ASCII */ { 0xff5b, 0xff64, 1}, /* half/fullwidth ASCII */ { 0xfff0, 0xffff, 0}, /* half/fullwidth ASCII */ { 0, 0, 0} }; const struct ucsword *wptr; switch (uc & CSET_MASK) { case CSET_LINEDRW: uc = term->ucsdata->unitab_xterm[uc & 0xFF]; break; case CSET_ASCII: uc = term->ucsdata->unitab_line[uc & 0xFF]; break; case CSET_SCOACS: uc = term->ucsdata->unitab_scoacs[uc&0xFF]; break; } switch (uc & CSET_MASK) { case CSET_ACP: uc = term->ucsdata->unitab_font[uc & 0xFF]; break; case CSET_OEMCP: uc = term->ucsdata->unitab_oemcp[uc & 0xFF]; break; } /* For DBCS fonts I can't do anything useful. Even this will sometimes * fail as there's such a thing as a double width space. :-( */ if (term->ucsdata->dbcs_screenfont && term->ucsdata->font_codepage == term->ucsdata->line_codepage) return (uc != ' '); if (uc < 0x80) return term->wordness[uc]; for (wptr = ucs_words; wptr->start; wptr++) { if (uc >= wptr->start && uc <= wptr->end) return wptr->ctype; } return 2; } /* * Spread the selection outwards according to the selection mode. */ static pos sel_spread_half(Terminal *term, pos p, int dir) { termline *ldata; short wvalue; int topy = -sblines(term); ldata = lineptr(p.y); switch (term->selmode) { case SM_CHAR: /* * In this mode, every character is a separate unit, except * for runs of spaces at the end of a non-wrapping line. */ if (!(ldata->lattr & LATTR_WRAPPED)) { termchar *q = ldata->chars + term->cols; while (q > ldata->chars && IS_SPACE_CHR(q[-1].chr) && !q[-1].cc_next) q--; if (q == ldata->chars + term->cols) q--; if (p.x >= q - ldata->chars) p.x = (dir == -1 ? q - ldata->chars : term->cols - 1); } break; case SM_WORD: /* * In this mode, the units are maximal runs of characters * whose `wordness' has the same value. */ wvalue = wordtype(term, UCSGET(ldata->chars, p.x)); if (dir == +1) { while (1) { int maxcols = (ldata->lattr & LATTR_WRAPPED2 ? term->cols-1 : term->cols); if (p.x < maxcols-1) { if (wordtype(term, UCSGET(ldata->chars, p.x+1)) == wvalue) p.x++; else break; } else { if (p.y+1 < term->rows && (ldata->lattr & LATTR_WRAPPED)) { termline *ldata2; ldata2 = lineptr(p.y+1); if (wordtype(term, UCSGET(ldata2->chars, 0)) == wvalue) { p.x = 0; p.y++; unlineptr(ldata); ldata = ldata2; } else { unlineptr(ldata2); break; } } else break; } } } else { while (1) { if (p.x > 0) { if (wordtype(term, UCSGET(ldata->chars, p.x-1)) == wvalue) p.x--; else break; } else { termline *ldata2; int maxcols; if (p.y <= topy) break; ldata2 = lineptr(p.y-1); maxcols = (ldata2->lattr & LATTR_WRAPPED2 ? term->cols-1 : term->cols); if (ldata2->lattr & LATTR_WRAPPED) { if (wordtype(term, UCSGET(ldata2->chars, maxcols-1)) == wvalue) { p.x = maxcols-1; p.y--; unlineptr(ldata); ldata = ldata2; } else { unlineptr(ldata2); break; } } else break; } } } break; case SM_LINE: /* * In this mode, every line is a unit. */ p.x = (dir == -1 ? 0 : term->cols - 1); break; } unlineptr(ldata); return p; } static void sel_spread(Terminal *term) { if (term->seltype == LEXICOGRAPHIC) { term->selstart = sel_spread_half(term, term->selstart, -1); decpos(term->selend); term->selend = sel_spread_half(term, term->selend, +1); incpos(term->selend); } } static void term_paste_callback(void *vterm) { Terminal *term = (Terminal *)vterm; if (term->paste_len == 0) return; while (term->paste_pos < term->paste_len) { int n = 0; while (n + term->paste_pos < term->paste_len) { if (term->paste_buffer[term->paste_pos + n++] == '\015') break; } if (term->ldisc) luni_send(term->ldisc, term->paste_buffer + term->paste_pos, n, 0); term->paste_pos += n; if (term->paste_pos < term->paste_len) { queue_toplevel_callback(term_paste_callback, term); return; } } sfree(term->paste_buffer); term->paste_buffer = NULL; term->paste_len = 0; } void term_do_paste(Terminal *term, const wchar_t *data, int len) { const wchar_t *p, *q; /* * Pasting data into the terminal counts as a keyboard event (for * purposes of the 'Reset scrollback on keypress' config option), * unless the paste is zero-length. */ if (len == 0) return; term_seen_key_event(term); if (term->paste_buffer) sfree(term->paste_buffer); term->paste_pos = term->paste_len = 0; term->paste_buffer = snewn(len + 12, wchar_t); if (term->bracketed_paste) { memcpy(term->paste_buffer, L"\033[200~", 6 * sizeof(wchar_t)); term->paste_len += 6; } p = q = data; while (p < data + len) { while (p < data + len && !(p <= data + len - sel_nl_sz && !memcmp(p, sel_nl, sizeof(sel_nl)))) p++; { int i; for (i = 0; i < p - q; i++) { term->paste_buffer[term->paste_len++] = q[i]; } } if (p <= data + len - sel_nl_sz && !memcmp(p, sel_nl, sizeof(sel_nl))) { term->paste_buffer[term->paste_len++] = '\015'; p += sel_nl_sz; } q = p; } if (term->bracketed_paste) { memcpy(term->paste_buffer + term->paste_len, L"\033[201~", 6 * sizeof(wchar_t)); term->paste_len += 6; } /* Assume a small paste will be OK in one go. */ if (term->paste_len < 256) { if (term->ldisc) luni_send(term->ldisc, term->paste_buffer, term->paste_len, 0); if (term->paste_buffer) sfree(term->paste_buffer); term->paste_buffer = 0; term->paste_pos = term->paste_len = 0; } queue_toplevel_callback(term_paste_callback, term); } void term_mouse(Terminal *term, Mouse_Button braw, Mouse_Button bcooked, Mouse_Action a, int x, int y, int shift, int ctrl, int alt) { pos selpoint; termline *ldata; int raw_mouse = (term->xterm_mouse && !term->no_mouse_rep && !(term->mouse_override && shift)); int default_seltype; if (y < 0) { y = 0; if (a == MA_DRAG && !raw_mouse) term_scroll(term, 0, -1); } if (y >= term->rows) { y = term->rows - 1; if (a == MA_DRAG && !raw_mouse) term_scroll(term, 0, +1); } if (x < 0) { if (y > 0 && !raw_mouse && term->seltype != RECTANGULAR) { /* * When we're using the mouse for normal raster-based * selection, dragging off the left edge of a terminal row * is treated the same as the right-hand end of the * previous row, in that it's considered to identify a * point _before_ the first character on row y. * * But if the mouse action is going to be used for * anything else - rectangular selection, or xterm mouse * tracking - then we disable this special treatment. */ x = term->cols - 1; y--; } else x = 0; } if (x >= term->cols) x = term->cols - 1; selpoint.y = y + term->disptop; ldata = lineptr(selpoint.y); if ((ldata->lattr & LATTR_MODE) != LATTR_NORM) x /= 2; /* * Transform x through the bidi algorithm to find the _logical_ * click point from the physical one. */ if (term_bidi_line(term, ldata, y) != NULL) { x = term->post_bidi_cache[y].backward[x]; } selpoint.x = x; unlineptr(ldata); /* * If we're in the middle of a selection operation, we ignore raw * mouse mode until it's done (we must have been not in raw mouse * mode when it started). * This makes use of Shift for selection reliable, and avoids the * host seeing mouse releases for which they never saw corresponding * presses. */ if (raw_mouse && (term->selstate != ABOUT_TO) && (term->selstate != DRAGGING)) { int encstate = 0, r, c, wheel; char abuf[32]; int len = 0; if (term->ldisc) { switch (braw) { case MBT_LEFT: encstate = 0x00; /* left button down */ wheel = FALSE; break; case MBT_MIDDLE: encstate = 0x01; wheel = FALSE; break; case MBT_RIGHT: encstate = 0x02; wheel = FALSE; break; case MBT_WHEEL_UP: encstate = 0x40; wheel = TRUE; break; case MBT_WHEEL_DOWN: encstate = 0x41; wheel = TRUE; break; default: return; } if (wheel) { /* For mouse wheel buttons, we only ever expect to see * MA_CLICK actions, and we don't try to keep track of * the buttons being 'pressed' (since without matching * click/release pairs that's pointless). */ if (a != MA_CLICK) return; } else switch (a) { case MA_DRAG: if (term->xterm_mouse == 1) return; encstate += 0x20; break; case MA_RELEASE: /* If multiple extensions are enabled, the xterm 1006 is used, so it's okay to check for only that */ if (!term->xterm_extended_mouse) encstate = 0x03; term->mouse_is_down = 0; break; case MA_CLICK: if (term->mouse_is_down == braw) return; term->mouse_is_down = braw; break; default: return; } if (shift) encstate += 0x04; if (ctrl) encstate += 0x10; r = y + 1; c = x + 1; /* Check the extensions in decreasing order of preference. Encoding the release event above assumes that 1006 comes first. */ if (term->xterm_extended_mouse) { len = sprintf(abuf, "\033[<%d;%d;%d%c", encstate, c, r, a == MA_RELEASE ? 'm' : 'M'); } else if (term->urxvt_extended_mouse) { len = sprintf(abuf, "\033[%d;%d;%dM", encstate + 32, c, r); } else if (c <= 223 && r <= 223) { len = sprintf(abuf, "\033[M%c%c%c", encstate + 32, c + 32, r + 32); } if (len > 0) ldisc_send(term->ldisc, abuf, len, 0); } return; } /* * Set the selection type (rectangular or normal) at the start * of a selection attempt, from the state of Alt. */ if (!alt ^ !term->rect_select) default_seltype = RECTANGULAR; else default_seltype = LEXICOGRAPHIC; if (term->selstate == NO_SELECTION) { term->seltype = default_seltype; } if (bcooked == MBT_SELECT && a == MA_CLICK) { deselect(term); term->selstate = ABOUT_TO; term->seltype = default_seltype; term->selanchor = selpoint; term->selmode = SM_CHAR; } else if (bcooked == MBT_SELECT && (a == MA_2CLK || a == MA_3CLK)) { deselect(term); term->selmode = (a == MA_2CLK ? SM_WORD : SM_LINE); term->selstate = DRAGGING; term->selstart = term->selanchor = selpoint; term->selend = term->selstart; incpos(term->selend); sel_spread(term); } else if ((bcooked == MBT_SELECT && a == MA_DRAG) || (bcooked == MBT_EXTEND && a != MA_RELEASE)) { if (a == MA_DRAG && (term->selstate == NO_SELECTION || term->selstate == SELECTED)) { /* * This can happen if a front end has passed us a MA_DRAG * without a prior MA_CLICK. OS X GTK does so, for * example, if the initial button press was eaten by the * WM when it activated the window in the first place. The * nicest thing to do in this situation is to ignore * further drags, and wait for the user to click in the * window again properly if they want to select. */ return; } if (term->selstate == ABOUT_TO && poseq(term->selanchor, selpoint)) return; if (bcooked == MBT_EXTEND && a != MA_DRAG && term->selstate == SELECTED) { if (term->seltype == LEXICOGRAPHIC) { /* * For normal selection, we extend by moving * whichever end of the current selection is closer * to the mouse. */ if (posdiff(selpoint, term->selstart) < posdiff(term->selend, term->selstart) / 2) { term->selanchor = term->selend; decpos(term->selanchor); } else { term->selanchor = term->selstart; } } else { /* * For rectangular selection, we have a choice of * _four_ places to put selanchor and selpoint: the * four corners of the selection. */ if (2*selpoint.x < term->selstart.x + term->selend.x) term->selanchor.x = term->selend.x-1; else term->selanchor.x = term->selstart.x; if (2*selpoint.y < term->selstart.y + term->selend.y) term->selanchor.y = term->selend.y; else term->selanchor.y = term->selstart.y; } term->selstate = DRAGGING; } if (term->selstate != ABOUT_TO && term->selstate != DRAGGING) term->selanchor = selpoint; term->selstate = DRAGGING; if (term->seltype == LEXICOGRAPHIC) { /* * For normal selection, we set (selstart,selend) to * (selpoint,selanchor) in some order. */ if (poslt(selpoint, term->selanchor)) { term->selstart = selpoint; term->selend = term->selanchor; incpos(term->selend); } else { term->selstart = term->selanchor; term->selend = selpoint; incpos(term->selend); } } else { /* * For rectangular selection, we may need to * interchange x and y coordinates (if the user has * dragged in the -x and +y directions, or vice versa). */ term->selstart.x = min(term->selanchor.x, selpoint.x); term->selend.x = 1+max(term->selanchor.x, selpoint.x); term->selstart.y = min(term->selanchor.y, selpoint.y); term->selend.y = max(term->selanchor.y, selpoint.y); } sel_spread(term); } else if ((bcooked == MBT_SELECT || bcooked == MBT_EXTEND) && a == MA_RELEASE) { if (term->selstate == DRAGGING) { /* * We've completed a selection. We now transfer the * data to the clipboard. */ clipme(term, term->selstart, term->selend, (term->seltype == RECTANGULAR), FALSE, term->mouse_select_clipboards, term->n_mouse_select_clipboards); term->selstate = SELECTED; } else term->selstate = NO_SELECTION; } else if (bcooked == MBT_PASTE && (a == MA_CLICK #if MULTICLICK_ONLY_EVENT || a == MA_2CLK || a == MA_3CLK #endif )) { term_request_paste(term, term->mouse_paste_clipboard); } /* * Since terminal output is suppressed during drag-selects, we * should make sure to write any pending output if one has just * finished. */ if (term->selstate != DRAGGING) term_out(term); term_update(term); } int format_arrow_key(char *buf, Terminal *term, int xkey, int ctrl) { char *p = buf; if (term->vt52_mode) p += sprintf((char *) p, "\x1B%c", xkey); else { int app_flg = (term->app_cursor_keys && !term->no_applic_c); #if 0 /* * RDB: VT100 & VT102 manuals both state the app cursor * keys only work if the app keypad is on. * * SGT: That may well be true, but xterm disagrees and so * does at least one application, so I've #if'ed this out * and the behaviour is back to PuTTY's original: app * cursor and app keypad are independently switchable * modes. If anyone complains about _this_ I'll have to * put in a configurable option. */ if (!term->app_keypad_keys) app_flg = 0; #endif /* Useful mapping of Ctrl-arrows */ if (ctrl) app_flg = !app_flg; if (app_flg) p += sprintf((char *) p, "\x1BO%c", xkey); else p += sprintf((char *) p, "\x1B[%c", xkey); } return p - buf; } void term_nopaste(Terminal *term) { if (term->paste_len == 0) return; sfree(term->paste_buffer); term->paste_buffer = NULL; term->paste_len = 0; } static void deselect(Terminal *term) { term->selstate = NO_SELECTION; term->selstart.x = term->selstart.y = term->selend.x = term->selend.y = 0; } void term_lost_clipboard_ownership(Terminal *term, int clipboard) { if (!(term->n_mouse_select_clipboards > 1 && clipboard == term->mouse_select_clipboards[1])) return; deselect(term); term_update(term); /* * Since terminal output is suppressed during drag-selects, we * should make sure to write any pending output if one has just * finished. */ if (term->selstate != DRAGGING) term_out(term); } int term_ldisc(Terminal *term, int option) { if (option == LD_ECHO) return term->term_echoing; if (option == LD_EDIT) return term->term_editing; return FALSE; } int term_data(Terminal *term, int is_stderr, const char *data, int len) { bufchain_add(&term->inbuf, data, len); if (!term->in_term_out) { term->in_term_out = TRUE; term_reset_cblink(term); /* * During drag-selects, we do not process terminal input, * because the user will want the screen to hold still to * be selected. */ if (term->selstate != DRAGGING) term_out(term); term->in_term_out = FALSE; } /* * term_out() always completely empties inbuf. Therefore, * there's no reason at all to return anything other than zero * from this function, because there _can't_ be a question of * the remote side needing to wait until term_out() has cleared * a backlog. * * This is a slightly suboptimal way to deal with SSH-2 - in * principle, the window mechanism would allow us to continue * to accept data on forwarded ports and X connections even * while the terminal processing was going slowly - but we * can't do the 100% right thing without moving the terminal * processing into a separate thread, and that might hurt * portability. So we manage stdout buffering the old SSH-1 way: * if the terminal processing goes slowly, the whole SSH * connection stops accepting data until it's ready. * * In practice, I can't imagine this causing serious trouble. */ return 0; } /* * Write untrusted data to the terminal. * The only control character that should be honoured is \n (which * will behave as a CRLF). */ int term_data_untrusted(Terminal *term, const char *data, int len) { int i; /* FIXME: more sophisticated checking? */ for (i = 0; i < len; i++) { if (data[i] == '\n') term_data(term, 1, "\r\n", 2); else if (data[i] & 0x60) term_data(term, 1, data + i, 1); } return 0; /* assumes that term_data() always returns 0 */ } void term_provide_logctx(Terminal *term, void *logctx) { term->logctx = logctx; } void term_set_focus(Terminal *term, int has_focus) { term->has_focus = has_focus; term_schedule_cblink(term); } /* * Provide "auto" settings for remote tty modes, suitable for an * application with a terminal window. */ char *term_get_ttymode(Terminal *term, const char *mode) { const char *val = NULL; if (strcmp(mode, "ERASE") == 0) { val = term->bksp_is_delete ? "^?" : "^H"; } else if (strcmp(mode, "IUTF8") == 0) { val = frontend_is_utf8(term->frontend) ? "yes" : "no"; } /* FIXME: perhaps we should set ONLCR based on lfhascr as well? */ /* FIXME: or ECHO and friends based on local echo state? */ return dupstr(val); } struct term_userpass_state { size_t curr_prompt; int done_prompt; /* printed out prompt yet? */ size_t pos; /* cursor position */ }; /* * Process some terminal data in the course of username/password * input. */ int term_get_userpass_input(Terminal *term, prompts_t *p, const unsigned char *in, int inlen) { struct term_userpass_state *s = (struct term_userpass_state *)p->data; if (!s) { /* * First call. Set some stuff up. */ p->data = s = snew(struct term_userpass_state); s->curr_prompt = 0; s->done_prompt = 0; /* We only print the `name' caption if we have to... */ if (p->name_reqd && p->name) { size_t l = strlen(p->name); term_data_untrusted(term, p->name, l); if (p->name[l-1] != '\n') term_data_untrusted(term, "\n", 1); } /* ...but we always print any `instruction'. */ if (p->instruction) { size_t l = strlen(p->instruction); term_data_untrusted(term, p->instruction, l); if (p->instruction[l-1] != '\n') term_data_untrusted(term, "\n", 1); } /* * Zero all the results, in case we abort half-way through. */ { int i; for (i = 0; i < (int)p->n_prompts; i++) prompt_set_result(p->prompts[i], ""); } } while (s->curr_prompt < p->n_prompts) { prompt_t *pr = p->prompts[s->curr_prompt]; int finished_prompt = 0; if (!s->done_prompt) { term_data_untrusted(term, pr->prompt, strlen(pr->prompt)); s->done_prompt = 1; s->pos = 0; } /* Breaking out here ensures that the prompt is printed even * if we're now waiting for user data. */ if (!in || !inlen) break; /* FIXME: should we be using local-line-editing code instead? */ while (!finished_prompt && inlen) { char c = *in++; inlen--; switch (c) { case 10: case 13: term_data(term, 0, "\r\n", 2); prompt_ensure_result_size(pr, s->pos + 1); pr->result[s->pos] = '\0'; /* go to next prompt, if any */ s->curr_prompt++; s->done_prompt = 0; finished_prompt = 1; /* break out */ break; case 8: case 127: if (s->pos > 0) { if (pr->echo) term_data(term, 0, "\b \b", 3); s->pos--; } break; case 21: case 27: while (s->pos > 0) { if (pr->echo) term_data(term, 0, "\b \b", 3); s->pos--; } break; case 3: case 4: /* Immediate abort. */ term_data(term, 0, "\r\n", 2); sfree(s); p->data = NULL; return 0; /* user abort */ default: /* * This simplistic check for printability is disabled * when we're doing password input, because some people * have control characters in their passwords. */ if (!pr->echo || (c >= ' ' && c <= '~') || ((unsigned char) c >= 160)) { prompt_ensure_result_size(pr, s->pos + 1); pr->result[s->pos++] = c; if (pr->echo) term_data(term, 0, &c, 1); } break; } } } if (s->curr_prompt < p->n_prompts) { return -1; /* more data required */ } else { sfree(s); p->data = NULL; return +1; /* all done */ } }