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putty/terminal.c

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C
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/*
* Terminal emulator.
*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <limits.h>
#include <wchar.h>
#include <time.h>
#include <assert.h>
#include "putty.h"
#include "terminal.h"
#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 )
static const char *const EMPTY_WINDOW_TITLE = "";
static const char sco2ansicolour[] = { 0, 4, 2, 6, 1, 5, 3, 7 };
#define sel_nl_sz (sizeof(sel_nl)/sizeof(wchar_t))
static 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 *);
static void erase_lots(Terminal *, bool, bool, bool);
static int find_last_nonempty_line(Terminal *, tree234 *);
static void swap_screen(Terminal *, int, bool, bool);
static void update_sbar(Terminal *);
static void deselect(Terminal *);
static void term_print_finish(Terminal *);
static void scroll(Terminal *, int, int, int, bool);
static void parse_optionalrgb(optionalrgb *out, unsigned *values);
static void term_added_data(Terminal *term);
static termline *newtermline(Terminal *term, int cols, bool 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->trusted = false;
line->temporary = false;
line->cc_free = 0;
return line;
}
static void freetermline(termline *line)
{
if (line) {
sfree(line->chars);
sfree(line);
}
}
static void unlineptr(termline *line)
{
if (line->temporary)
freetermline(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
static void clear_cc(termline *line, int col);
/*
* 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);
/*
* Don't add combining characters at all to U+FFFD REPLACEMENT
* CHARACTER. (Partly it's a slightly incoherent idea in the first
* place; mostly, U+FFFD is what we generate if a cell already has
* too many ccs, in which case we want it to be a fixed point when
* further ccs are added.)
*/
if (line->chars[col].chr == 0xFFFD)
return;
/*
* Walk the cc list of the cell in question to find its current
* end point.
*/
size_t ncc = 0;
int origcol = col;
while (line->chars[col].cc_next) {
col += line->chars[col].cc_next;
if (++ncc >= CC_LIMIT) {
/*
* There are already too many combining characters in this
* character cell. Change strategy: throw out the entire
* chain and replace the main character with U+FFFD.
*
* (Rationale: extrapolating from UTR #36 section 3.6.2
* suggests the principle that it's better to substitute
* U+FFFD than to _ignore_ input completely. Also, if the
* user copies and pastes an overcombined character cell,
* this way it will clearly indicate that we haven't
* reproduced the writer's original intentions, instead of
* looking as if it was the _writer's_ fault that the 33rd
* cc is missing.)
*
* Per the code above, this will also prevent any further
* ccs from being added to this cell.
*/
clear_cc(line, origcol);
line->chars[origcol].chr = 0xFFFD;
return;
}
}
/*
* Extend the cols array if the free list is empty.
*/
if (!line->cc_free) {
int n = line->size;
size_t tmpsize = line->size;
sgrowarray(line->chars, tmpsize, tmpsize);
assert(tmpsize <= INT_MAX);
line->size = tmpsize;
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++;
}
}
/*
* `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 bool 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 bool 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.)
*/
static void makerle(strbuf *b, termline *ldata,
void (*makeliteral)(strbuf *b, termchar *c,
unsigned long *state))
{
int hdrpos, hdrsize, n, prevlen, prevpos, thislen, thispos;
bool prev2;
termchar *c = ldata->chars;
unsigned long state = 0, oldstate;
n = ldata->cols;
hdrpos = b->len;
hdrsize = 0;
put_byte(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->u + prevpos, b->u + 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;
strbuf_shrink_to(b, prevpos+prevlen);
} else {
memmove(b->u + prevpos+1, b->u + prevpos, prevlen);
runpos = prevpos;
strbuf_shrink_to(b, prevpos+prevlen+1);
/*
* Terminate the previous run of ordinary
* literals.
*/
assert(hdrsize >= 1 && hdrsize <= 128);
b->u[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;
strbuf_shrink_to(b, tmppos);
if (tmplen != thislen ||
memcmp(b->u + runpos+1, b->u + tmppos, tmplen)) {
state = oldstate;
break; /* run over */
}
n--, c++, runlen++;
}
assert(runlen >= 2 && runlen <= 129);
b->u[runpos] = runlen + 0x80 - 2;
hdrpos = b->len;
hdrsize = 0;
put_byte(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->u[hdrpos] = hdrsize - 1;
hdrpos = b->len;
hdrsize = 0;
put_byte(b, 0);
prevlen = prevpos = 0;
prev2 = false;
}
}
/*
* Clean up.
*/
if (hdrsize > 0) {
assert(hdrsize <= 128);
b->u[hdrpos] = hdrsize - 1;
} else {
strbuf_shrink_to(b, hdrpos);
}
}
static void makeliteral_chr(strbuf *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) {
put_byte(b, (unsigned char)(c->chr & 0x7F));
} else if (c->chr < 0x4000) {
put_byte(b, (unsigned char)(((c->chr >> 8) & 0x3F) | 0x80));
put_byte(b, (unsigned char)(c->chr & 0xFF));
} else if (c->chr < 0x200000) {
put_byte(b, (unsigned char)(((c->chr >> 16) & 0x1F) | 0xC0));
put_uint16(b, c->chr & 0xFFFF);
} else if (c->chr < 0x10000000) {
put_byte(b, (unsigned char)(((c->chr >> 24) & 0x0F) | 0xE0));
put_byte(b, (unsigned char)((c->chr >> 16) & 0xFF));
put_uint16(b, c->chr & 0xFFFF);
} else {
put_byte(b, 0xF0);
put_uint32(b, c->chr);
}
*state = c->chr & ~0xFF;
}
static void makeliteral_attr(strbuf *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) {
put_byte(b, (unsigned char)((attr >> 8) & 0xFF));
put_byte(b, (unsigned char)(attr & 0xFF));
} else {
put_byte(b, (unsigned char)(((attr >> 24) & 0x7F) | 0x80));
put_byte(b, (unsigned char)((attr >> 16) & 0xFF));
put_byte(b, (unsigned char)((attr >> 8) & 0xFF));
put_byte(b, (unsigned char)(attr & 0xFF));
}
}
static void makeliteral_truecolour(strbuf *b, termchar *c, unsigned long *state)
{
/*
* Put the used parts of the colour info into the buffer.
*/
put_byte(b, ((c->truecolour.fg.enabled ? 1 : 0) |
(c->truecolour.bg.enabled ? 2 : 0)));
if (c->truecolour.fg.enabled) {
put_byte(b, c->truecolour.fg.r);
put_byte(b, c->truecolour.fg.g);
put_byte(b, c->truecolour.fg.b);
}
if (c->truecolour.bg.enabled) {
put_byte(b, c->truecolour.bg.r);
put_byte(b, c->truecolour.bg.g);
put_byte(b, c->truecolour.bg.b);
}
}
static void makeliteral_cc(strbuf *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);
}
typedef struct compressed_scrollback_line {
size_t len;
} compressed_scrollback_line;
static termline *decompressline(compressed_scrollback_line *line);
static compressed_scrollback_line *compressline(termline *ldata)
{
strbuf *b = strbuf_new();
/* Leave space for the header structure */
strbuf_append(b, sizeof(compressed_scrollback_line));
/*
* 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) {
put_byte(b, (unsigned char)((n & 0x7F) | 0x80));
n >>= 7;
}
put_byte(b, (unsigned char)(n));
}
/*
* Next store the lattrs; same principle. We add one extra bit to
* this to indicate the trust state of the line.
*/
{
int n = ldata->lattr | (ldata->trusted ? 0x10000 : 0);
while (n >= 128) {
put_byte(b, (unsigned char)((n & 0x7F) | 0x80));
n >>= 7;
}
put_byte(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
{
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((compressed_scrollback_line *)b->u);
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
freetermline(dcl);
}
#endif
#endif /* TERM_CC_DIAGS */
size_t linelen = b->len - sizeof(compressed_scrollback_line);
compressed_scrollback_line *line =
(compressed_scrollback_line *)strbuf_to_str(b);
line->len = linelen;
return line;
}
static void readrle(BinarySource *bs, termline *ldata,
void (*readliteral)(BinarySource *bs, termchar *c,
termline *ldata, unsigned long *state))
{
int n = 0;
unsigned long state = 0;
while (n < ldata->cols) {
int hdr = get_byte(bs);
if (hdr >= 0x80) {
/* A run. */
size_t pos = bs->pos, count = hdr + 2 - 0x80;
while (count--) {
assert(n < ldata->cols);
bs->pos = pos;
readliteral(bs, ldata->chars + n, ldata, &state);
n++;
}
} else {
/* Just a sequence of consecutive literals. */
int count = hdr + 1;
while (count--) {
assert(n < ldata->cols);
readliteral(bs, ldata->chars + n, ldata, &state);
n++;
}
}
}
assert(n == ldata->cols);
}
static void readliteral_chr(BinarySource *bs, 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_byte(bs);
if (byte < 0x80) {
c->chr = byte | *state;
} else if (byte < 0xC0) {
c->chr = (byte &~ 0xC0) << 8;
c->chr |= get_byte(bs);
} else if (byte < 0xE0) {
c->chr = (byte &~ 0xE0) << 16;
c->chr |= get_uint16(bs);
} else if (byte < 0xF0) {
c->chr = (byte &~ 0xF0) << 24;
c->chr |= get_byte(bs) << 16;
c->chr |= get_uint16(bs);
} else {
assert(byte == 0xF0);
c->chr = get_uint32(bs);
}
*state = c->chr & ~0xFF;
}
static void readliteral_attr(BinarySource *bs, termchar *c, termline *ldata,
unsigned long *state)
{
unsigned val, attr, colourbits;
val = get_uint16(bs);
if (val >= 0x8000) {
val &= ~0x8000;
val <<= 16;
val |= get_uint16(bs);
}
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(
BinarySource *bs, termchar *c, termline *ldata, unsigned long *state)
{
int flags = get_byte(bs);
if (flags & 1) {
c->truecolour.fg.enabled = true;
c->truecolour.fg.r = get_byte(bs);
c->truecolour.fg.g = get_byte(bs);
c->truecolour.fg.b = get_byte(bs);
} else {
c->truecolour.fg = optionalrgb_none;
}
if (flags & 2) {
c->truecolour.bg.enabled = true;
c->truecolour.bg.r = get_byte(bs);
c->truecolour.bg.g = get_byte(bs);
c->truecolour.bg.b = get_byte(bs);
} else {
c->truecolour.bg = optionalrgb_none;
}
}
static void readliteral_cc(BinarySource *bs, 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(bs, &n, ldata, &zstate);
if (!n.chr)
break;
add_cc(ldata, x, n.chr);
}
}
static termline *decompressline(compressed_scrollback_line *line)
{
int ncols, byte, shift;
BinarySource bs[1];
termline *ldata;
BinarySource_BARE_INIT(bs, line+1, line->len);
/*
* First read in the column count.
*/
ncols = shift = 0;
do {
byte = get_byte(bs);
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.
*/
int lattr = shift = 0;
do {
byte = get_byte(bs);
lattr |= (byte & 0x7F) << shift;
shift += 7;
} while (byte & 0x80);
ldata->lattr = lattr & 0xFFFF;
ldata->trusted = (lattr & 0x10000) != 0;
/*
* Now we read in each of the RLE streams in turn.
*/
readrle(bs, ldata, readliteral_chr);
readrle(bs, ldata, readliteral_attr);
readrle(bs, ldata, readliteral_truecolour);
readrle(bs, ldata, readliteral_cc);
/* And we always expect that we ended up exactly at the end of the
* compressed data. */
assert(!get_err(bs));
assert(get_avail(bs) == 0);
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;
}
static void null_line_error(Terminal *term, int y, int lineno,
tree234 *whichtree, int treeindex,
const char *varname)
{
modalfatalbox("%s==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"
"commitid=%s\n\n"
"Please contact <putty@projects.tartarus.org> "
"and pass on the above information.",
varname, 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, commitid);
}
/*
* 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) {
compressed_scrollback_line *cline = index234(whichtree, treeindex);
if (!cline)
null_line_error(term, y, lineno, whichtree, treeindex, "cline");
line = decompressline(cline);
} else {
line = index234(whichtree, treeindex);
}
/* We assume that we don't screw up and retrieve something out of range. */
if (line == NULL)
null_line_error(term, y, lineno, whichtree, treeindex, "line");
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__,0)
#define scrlineptr(x) (lineptr)(term,x,__LINE__,1)
/*
* 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;
bool 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 = true; /* 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 = true; /* 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 = true;
term->cblink_pending = false;
term_schedule_cblink(term);
}
/*
* Call to begin a visual bell.
*/
static void term_schedule_vbell(Terminal *term, bool 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, bool 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_bool(term->conf, CONF_dec_om);
term->alt_ins = false;
term->insert = false;
term->alt_wnext = false;
term->wrapnext = false;
term->save_wnext = false;
term->alt_save_wnext = false;
term->alt_wrap = term->wrap = conf_get_bool(term->conf, CONF_wrap_mode);
term->alt_cset = term->cset = term->save_cset = term->alt_save_cset = 0;
term->alt_utf = false;
term->utf = false;
term->save_utf = false;
term->alt_save_utf = false;
term->utf8.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 = false;
term->in_vbell = false;
term->cursor_on = true;
term->big_cursor = false;
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->app_cursor_keys = conf_get_bool(term->conf, CONF_app_cursor);
term->app_keypad_keys = conf_get_bool(term->conf, CONF_app_keypad);
term->use_bce = conf_get_bool(term->conf, CONF_bce);
term->blink_is_real = conf_get_bool(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 = false;
term->urxvt_extended_mouse = false;
win_set_raw_mouse_mode(term->win, false);
term->bracketed_paste = false;
term->srm_echo = 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)
{
term->window_update_pending = false;
if (win_setup_draw_ctx(term->win)) {
bool 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 = false;
need_sbar_update = true;
}
if (need_sbar_update)
update_sbar(term);
do_paint(term);
win_set_cursor_pos(
term->win, term->curs.x, term->curs.y - term->disptop);
win_free_draw_ctx(term->win);
}
}
/*
* 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, bool 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_bool(term->conf, CONF_ansi_colour);
term->no_arabicshaping = conf_get_bool(term->conf, CONF_no_arabicshaping);
term->beep = conf_get_int(term->conf, CONF_beep);
term->bellovl = conf_get_bool(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->no_bidi = conf_get_bool(term->conf, CONF_no_bidi);
term->bksp_is_delete = conf_get_bool(term->conf, CONF_bksp_is_delete);
term->blink_cur = conf_get_bool(term->conf, CONF_blink_cur);
term->blinktext = conf_get_bool(term->conf, CONF_blinktext);
term->cjk_ambig_wide = conf_get_bool(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_bool(term->conf, CONF_crhaslf);
term->erase_to_scrollback = conf_get_bool(term->conf, CONF_erase_to_scrollback);
term->funky_type = conf_get_int(term->conf, CONF_funky_type);
term->lfhascr = conf_get_bool(term->conf, CONF_lfhascr);
term->logflush = conf_get_bool(term->conf, CONF_logflush);
term->logtype = conf_get_int(term->conf, CONF_logtype);
term->mouse_override = conf_get_bool(term->conf, CONF_mouse_override);
term->nethack_keypad = conf_get_bool(term->conf, CONF_nethack_keypad);
term->no_alt_screen = conf_get_bool(term->conf, CONF_no_alt_screen);
term->no_applic_c = conf_get_bool(term->conf, CONF_no_applic_c);
term->no_applic_k = conf_get_bool(term->conf, CONF_no_applic_k);
term->no_dbackspace = conf_get_bool(term->conf, CONF_no_dbackspace);
term->no_mouse_rep = conf_get_bool(term->conf, CONF_no_mouse_rep);
term->no_remote_charset = conf_get_bool(term->conf, CONF_no_remote_charset);
term->no_remote_resize = conf_get_bool(term->conf, CONF_no_remote_resize);
term->no_remote_wintitle = conf_get_bool(term->conf, CONF_no_remote_wintitle);
term->no_remote_clearscroll = conf_get_bool(term->conf, CONF_no_remote_clearscroll);
term->rawcnp = conf_get_bool(term->conf, CONF_rawcnp);
term->utf8linedraw = conf_get_bool(term->conf, CONF_utf8linedraw);
term->rect_select = conf_get_bool(term->conf, CONF_rect_select);
term->remote_qtitle_action = conf_get_int(term->conf, CONF_remote_qtitle_action);
term->rxvt_homeend = conf_get_bool(term->conf, CONF_rxvt_homeend);
term->scroll_on_disp = conf_get_bool(term->conf, CONF_scroll_on_disp);
term->scroll_on_key = conf_get_bool(term->conf, CONF_scroll_on_key);
term->xterm_256_colour = conf_get_bool(term->conf, CONF_xterm_256_colour);
term->true_colour = conf_get_bool(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.
*/
bool reset_wrap, reset_decom, reset_bce, reset_tblink, reset_charclass;
int i;
reset_wrap = (conf_get_bool(term->conf, CONF_wrap_mode) !=
conf_get_bool(conf, CONF_wrap_mode));
reset_decom = (conf_get_bool(term->conf, CONF_dec_om) !=
conf_get_bool(conf, CONF_dec_om));
reset_bce = (conf_get_bool(term->conf, CONF_bce) !=
conf_get_bool(conf, CONF_bce));
reset_tblink = (conf_get_bool(term->conf, CONF_blinktext) !=
conf_get_bool(conf, CONF_blinktext));
reset_charclass = false;
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 = true;
/*
* If the bidi or shaping settings have changed, flush the bidi
* cache completely.
*/
if (conf_get_bool(term->conf, CONF_no_arabicshaping) !=
conf_get_bool(conf, CONF_no_arabicshaping) ||
conf_get_bool(term->conf, CONF_no_bidi) !=
conf_get_bool(conf, CONF_no_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_bool(term->conf, CONF_wrap_mode);
if (reset_decom)
term->alt_om = term->dec_om = conf_get_bool(term->conf, CONF_dec_om);
if (reset_bce) {
term->use_bce = conf_get_bool(term->conf, CONF_bce);
set_erase_char(term);
}
if (reset_tblink) {
term->blink_is_real = conf_get_bool(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_bool(term->conf, CONF_no_alt_screen))
swap_screen(term, 0, false, false);
if (conf_get_bool(term->conf, CONF_no_mouse_rep)) {
term->xterm_mouse = 0;
win_set_raw_mouse_mode(term->win, 0);
}
if (conf_get_bool(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 = false;
}
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));
/*
* That operation has invalidated the selection, if it overlapped
* the scrollback at all.
*/
if (term->selstate != NO_SELECTION && term->selstart.y < 0)
deselect(term);
/*
* 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, TermWin *win)
{
Terminal *term;
/*
* Allocate a new Terminal structure and initialise the fields
* that need it.
*/
term = snew(Terminal);
term->win = win;
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 = 0;
term->reset_132 = false;
term->cblinker = false;
term->tblinker = false;
term->has_focus = true;
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;
term->nbeeps = 0;
term->lastbeep = false;
term->beep_overloaded = false;
term->attr_mask = 0xffffffff;
term->backend = 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;
/* TermWin implementations 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;
term->last_graphic_char = 0;
term->trusted = true;
term->bracketed_paste_active = false;
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)
freetermline(line);
freetree234(term->screen);
while ((line = delpos234(term->alt_screen, 0)) != NULL)
freetermline(line);
freetree234(term->alt_screen);
if (term->disptext) {
for (i = 0; i < term->rows; i++)
freetermline(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);
delete_callbacks_for_context(term);
conf_free(term->conf);
sfree(term);
}
void term_set_trust_status(Terminal *term, bool trusted)
{
term->trusted = trusted;
}
void term_get_cursor_position(Terminal *term, int *x, int *y)
{
*x = term->curs.x;
*y = term->curs.y;
}
/*
* 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) {
compressed_scrollback_line *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);
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 = newtermline(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);
freetermline(line);
} else {
/* push top row to scrollback */
line = delpos234(term->screen, 0);
addpos234(term->scrollback, compressline(line), sblen++);
freetermline(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] = newtermline(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++)
freetermline(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 = newtermline(term, newcols, true);
addpos234(newalt, line, i);
}
if (term->alt_screen) {
while (NULL != (line = delpos234(term->alt_screen, 0)))
freetermline(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 = false;
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->backend)
backend_size(term->backend, term->cols, term->rows);
}
/*
* Hand a backend to the terminal, so it can be notified of resizes.
*/
void term_provide_backend(Terminal *term, Backend *backend)
{
term->backend = backend;
if (term->backend && term->cols > 0 && term->rows > 0)
backend_size(term->backend, 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,
bool reset, bool keep_cur_pos)
{
int t;
bool bt;
pos tp;
truecolour ttc;
tree234 *ttr;
if (!which)
reset = false; /* do no weird resetting if which==0 */
if (which != term->alt_which) {
if (term->erase_to_scrollback && term->alt_screen &&
term->alt_which && term->disptop < 0) {
/*
* We're swapping away from the alternate screen, so some
* lines are about to vanish from the virtual scrollback.
* Adjust disptop by that much, so that (if we're not
* resetting the scrollback anyway on a display event) the
* current scroll position still ends up pointing at the
* same text.
*/
term->disptop += term->alt_sblines;
if (term->disptop > 0)
term->disptop = 0;
}
term->alt_which = which;
ttr = term->alt_screen;
term->alt_screen = term->screen;
term->screen = ttr;
term->alt_sblines = (
term->alt_screen ?
find_last_nonempty_line(term, term->alt_screen) + 1 : 0);
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;
bt = term->dec_om;
if (!reset) term->dec_om = term->alt_om;
term->alt_om = bt;
bt = term->wrap;
if (!reset) term->wrap = term->alt_wrap;
term->alt_wrap = bt;
bt = term->wrapnext;
if (!reset) term->wrapnext = term->alt_wnext;
term->alt_wnext = bt;
bt = term->insert;
if (!reset) term->insert = term->alt_ins;
term->alt_ins = bt;
t = term->cset;
if (!reset) term->cset = term->alt_cset;
term->alt_cset = t;
bt = term->utf;
if (!reset) term->utf = term->alt_utf;
term->alt_utf = bt;
t = term->sco_acs;
if (!reset) term->sco_acs = term->alt_sco_acs;
term->alt_sco_acs = t;
tp = term->savecurs;
if (!reset)
term->savecurs = term->alt_savecurs;
term->alt_savecurs = tp;
t = term->save_cset;
if (!reset)
term->save_cset = term->alt_save_cset;
term->alt_save_cset = t;
t = term->save_csattr;
if (!reset)
term->save_csattr = term->alt_save_csattr;
term->alt_save_csattr = t;
t = term->save_attr;
if (!reset)
term->save_attr = term->alt_save_attr;
term->alt_save_attr = t;
ttc = term->save_truecolour;
if (!reset)
term->save_truecolour = term->alt_save_truecolour;
term->alt_save_truecolour = ttc;
bt = term->save_utf;
if (!reset)
term->save_utf = term->alt_save_utf;
term->alt_save_utf = bt;
bt = term->save_wnext;
if (!reset)
term->save_wnext = term->alt_save_wnext;
term->alt_save_wnext = bt;
t = term->save_sco_acs;
if (!reset)
term->save_sco_acs = term->alt_save_sco_acs;
term->alt_save_sco_acs = t;
if (term->erase_to_scrollback && term->alt_screen &&
term->alt_which && term->disptop < 0) {
/*
* Inverse of the adjustment at the top of this function.
* This time, we're swapping _to_ the alternate screen, so
* some lines are about to _appear_ in the virtual
* scrollback, and we adjust disptop in the other
* direction.
*
* Both these adjustments depend on the value stored in
* term->alt_sblines while the alt screen is selected,
* which is why we had to do one _before_ switching away
* from it and the other _after_ switching to it.
*/
term->disptop -= term->alt_sblines;
int limit = -sblines(term);
if (term->disptop < limit)
term->disptop = limit;
}
}
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);
win_set_scrollbar(term->win, 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);
}
static void clear_line(Terminal *term, termline *line)
{
resizeline(term, line, term->cols);
for (int i = 0; i < term->cols; i++)
copy_termchar(line, i, &term->erase_char);
line->lattr = LATTR_NORM;
}
static void check_trust_status(Terminal *term, termline *line)
{
if (line->trusted != term->trusted) {
/*
* If we're displaying trusted output on a previously
* untrusted line, or vice versa, we need to switch the
* 'trusted' attribute on this terminal line, and also clear
* all its previous contents.
*/
clear_line(term, line);
line->trusted = term->trusted;
}
}
/*
* 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, bool sb)
{
termline *line;
int seltop, scrollwinsize;
if (topline != 0 || term->alt_which != 0)
sb = false;
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);
clear_line(term, line);
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);
clear_line(term, line);
check_trust_status(term, line);
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;
}
}
}
}
}
}
/*
* 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, bool 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_trust_status(term, ldata);
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,
bool line_only, bool from_begin, bool to_end)
{
pos start, end;
bool erase_lattr;
bool erasing_lines_from_top = false;
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;
}
/* This is the endpoint of the clearing operation that is not
* either the start or end of the line / screen. */
pos boundary = term->curs;
if (!from_begin) {
/*
* If we're erasing from the current char to the end of
* line/screen, then we take account of wrapnext, so as to
* maintain the invariant that writing a printing character
* followed by ESC[K should not overwrite the character you
* _just wrote_. That is, when wrapnext says the cursor is
* 'logically' at the very rightmost edge of the screen
* instead of just before the last printing char, ESC[K should
* do nothing at all, and ESC[J should clear the next line but
* leave this one unchanged.
*
* This adjusted position will also be the position we use for
* check_boundary (i.e. the thing we ensure isn't in the
* middle of a double-width printing char).
*/
if (term->wrapnext)
incpos(boundary);
start = boundary;
}
if (!to_end) {
/*
* If we're erasing from the start of (at least) the line _to_
* the current position, then that is taken to mean 'inclusive
* of the cell under the cursor', which means we don't
* consider wrapnext at all: whether it's set or not, we still
* clear the cell under the cursor.
*
* Again, that incremented boundary position is where we
* should be careful of a straddling wide character.
*/
incpos(boundary);
end = boundary;
}
if (!from_begin || !to_end)
check_boundary(term, boundary.x, boundary.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 = true;
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);
check_trust_status(term, ldata);
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);
check_trust_status(term, ldata);
}
}
}
/* 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);
check_trust_status(term, ldata);
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, bool state)
{
if (query == 1) {
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)
win_request_resize(term->win, 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 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;
win_set_raw_mouse_mode(term->win, state);
break;
case 1002: /* xterm mouse 2 (inc. button drags) */
term->xterm_mouse = state ? 2 : 0;
win_set_raw_mouse_mode(term->win, state);
break;
case 1006: /* xterm extended mouse */
term->xterm_extended_mouse = state;
break;
case 1015: /* urxvt extended mouse */
term->urxvt_extended_mouse = state;
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 if (query == 0) {
switch (mode) {
case 4: /* IRM: set insert mode */
compatibility(VT102);
term->insert = state;
break;
case 12: /* SRM: set echo mode */
term->srm_echo = !state;
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)
win_set_icon_title(term->win, 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)
win_set_title(term->win, term->osc_string);
break;
case 4:
if (term->ldisc && !strcmp(term->osc_string, "?")) {
int r, g, b;
if (win_palette_get(term->win, 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),
false);
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)
{
size_t size;
while ((size = bufchain_size(&term->printer_buf)) > 5) {
ptrlen data = bufchain_prefix(&term->printer_buf);
if (data.len > size-5)
data.len = size-5;
printer_job_data(term->print_job, data.ptr, data.len);
bufchain_consume(&term->printer_buf, data.len);
}
}
static void term_print_finish(Terminal *term)
{
size_t 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) {
ptrlen data = bufchain_prefix(&term->printer_buf);
c = *(char *)data.ptr;
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;
}
static void term_display_graphic_char(Terminal *term, unsigned long c)
{
termline *cline = scrlineptr(term->curs.y);
int width = 0;
if (DIRECT_CHAR(c))
width = 1;
if (!width)
width = term_char_width(term, 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);
check_trust_status(term, cline);
int linecols = term->cols;
if (cline->trusted)
linecols -= TRUST_SIGIL_WIDTH;
/*
* Preliminary check: if the terminal is only one character cell
* wide, then we cannot display any double-width character at all.
* Substitute single-width REPLACEMENT CHARACTER instead.
*/
if (width == 2 && linecols < 2) {
width = 1;
c = 0xFFFD;
}
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 >= linecols-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);
}
return;
default:
return;
}
term->curs.x++;
if (term->curs.x >= linecols) {
term->curs.x = linecols - 1;
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);
}
static strbuf *term_input_data_from_unicode(
Terminal *term, const wchar_t *widebuf, int len)
{
strbuf *buf = strbuf_new();
if (in_utf(term)) {
/*
* Translate input wide characters into UTF-8 to go in the
* terminal's input data queue.
*/
for (int i = 0; i < len; i++) {
unsigned long ch = widebuf[i];
if (IS_SURROGATE(ch)) {
#ifdef PLATFORM_IS_UTF16
if (i+1 < len) {
unsigned long ch2 = widebuf[i+1];
if (IS_SURROGATE_PAIR(ch, ch2)) {
ch = FROM_SURROGATES(ch, ch2);
i++;
}
} else
#endif
{
/* Unrecognised UTF-16 sequence */
ch = '.';
}
}
char utf8_chr[6];
put_data(buf, utf8_chr, encode_utf8(utf8_chr, ch));
}
} else {
/*
* Call to the character-set subsystem to translate into
* whatever charset the terminal is currently configured in.
*
* Since the terminal doesn't currently support any multibyte
* character set other than UTF-8, we can assume here that
* there will be at most one output byte per input wchar_t.
* (But also we must allow space for the trailing NUL that
* wc_to_mb will write.)
*/
char *bufptr = strbuf_append(buf, len + 1);
int rv;
rv = wc_to_mb(term->ucsdata->line_codepage, 0, widebuf, len,
bufptr, len + 1, NULL, term->ucsdata);
strbuf_shrink_to(buf, rv < 0 ? 0 : rv);
}
return buf;
}
static strbuf *term_input_data_from_charset(
Terminal *term, int codepage, const char *str, int len)
{
strbuf *buf;
if (codepage < 0) {
buf = strbuf_new();
put_data(buf, str, len);
} else {
int widesize = len * 2; /* allow for UTF-16 surrogates */
wchar_t *widebuf = snewn(widesize, wchar_t);
int widelen = mb_to_wc(codepage, 0, str, len, widebuf, widesize);
buf = term_input_data_from_unicode(term, widebuf, widelen);
sfree(widebuf);
}
return buf;
}
static inline void term_bracketed_paste_start(Terminal *term)
{
ptrlen seq = PTRLEN_LITERAL("\033[200~");
if (term->ldisc)
ldisc_send(term->ldisc, seq.ptr, seq.len, false);
term->bracketed_paste_active = true;
}
static inline void term_bracketed_paste_stop(Terminal *term)
{
if (!term->bracketed_paste_active)
return;
ptrlen seq = PTRLEN_LITERAL("\033[201~");
if (term->ldisc)
ldisc_send(term->ldisc, seq.ptr, seq.len, false);
term->bracketed_paste_active = false;
}
static inline void term_keyinput_internal(
Terminal *term, const void *buf, int len, bool interactive)
{
if (term->srm_echo) {
/*
* Implement the terminal-level local echo behaviour that
* ECMA-48 specifies when terminal mode 12 is configured off
* (ESC[12l). In this mode, data input to the terminal via the
* keyboard is also added to the output buffer. But this
* doesn't apply to escape sequences generated as session
* input _within_ the terminal, e.g. in response to terminal
* query sequences, or the bracketing sequences of bracketed
* paste mode. Those will be sent directly via
* ldisc_send(term->ldisc, ...) and won't go through this
* function.
*/
/* Mimic the special case of negative length in ldisc_send */
int true_len = len >= 0 ? len : strlen(buf);
bufchain_add(&term->inbuf, buf, true_len);
term_added_data(term);
}
if (interactive)
term_bracketed_paste_stop(term);
if (term->ldisc)
ldisc_send(term->ldisc, buf, len, interactive);
term_seen_key_event(term);
}
unsigned long term_translate(
Terminal *term, struct term_utf8_decode *utf8, unsigned char c)
{
if (in_utf(term)) {
switch (utf8->state) {
case 0:
if (c < 0x80) {
/* UTF-8 must be stateless so we ignore iso2022. */
if (term->ucsdata->unitab_ctrl[c] != 0xFF) {
return term->ucsdata->unitab_ctrl[c];
} else if ((term->utf8linedraw) &&
(term->cset_attr[term->cset] == CSET_LINEDRW)) {
/* Linedraw characters are explicitly enabled */
return c | CSET_LINEDRW;
} else {
return c | CSET_ASCII;
}
} else if ((c & 0xe0) == 0xc0) {
utf8->size = utf8->state = 1;
utf8->chr = (c & 0x1f);
} else if ((c & 0xf0) == 0xe0) {
utf8->size = utf8->state = 2;
utf8->chr = (c & 0x0f);
} else if ((c & 0xf8) == 0xf0) {
utf8->size = utf8->state = 3;
utf8->chr = (c & 0x07);
} else if ((c & 0xfc) == 0xf8) {
utf8->size = utf8->state = 4;
utf8->chr = (c & 0x03);
} else if ((c & 0xfe) == 0xfc) {
utf8->size = utf8->state = 5;
utf8->chr = (c & 0x01);
} else {
return UCSINVALID;
}
return UCSINCOMPLETE;
case 1:
case 2:
case 3:
case 4:
case 5:
if ((c & 0xC0) != 0x80) {
utf8->state = 0;
return UCSTRUNCATED; /* caller will then give us the
* same byte again */
}
utf8->chr = (utf8->chr << 6) | (c & 0x3f);
if (--utf8->state)
return UCSINCOMPLETE;
unsigned long t = utf8->chr;
/* Is somebody trying to be evil! */
if (t < 0x80 ||
(t < 0x800 && utf8->size >= 2) ||
(t < 0x10000 && utf8->size >= 3) ||
(t < 0x200000 && utf8->size >= 4) ||
(t < 0x4000000 && utf8->size >= 5))
return UCSINVALID;
/* Unicode line separator and paragraph separator are CR-LF */
if (t == 0x2028 || t == 0x2029)
return 0x85;
/* High controls are probably a Baaad idea too. */
if (t < 0xA0)
return 0xFFFD;
/* The UTF-16 surrogates are not nice either. */
/* The standard give the option of decoding these:
* I don't want to! */
if (t >= 0xD800 && t < 0xE000)
return UCSINVALID;
/* ISO 10646 characters now limited to UTF-16 range. */
if (t > 0x10FFFF)
return UCSINVALID;
/* This is currently a TagPhobic application.. */
if (t >= 0xE0000 && t <= 0xE007F)
return UCSINCOMPLETE;
/* U+FEFF is best seen as a null. */
if (t == 0xFEFF)
return UCSINCOMPLETE;
/* But U+FFFE is an error. */
if (t == 0xFFFE || t == 0xFFFF)
return UCSINVALID;
return t;
}
} else if (term->sco_acs &&
(c!='\033' && c!='\012' && c!='\015' && c!='\b')) {
/* Are we in the nasty ACS mode? Note: no sco in utf mode. */
if (term->sco_acs == 2)
c |= 0x80;
return 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)
return term->ucsdata->unitab_ctrl[c];
else
return c | CSET_LINEDRW;
break;
case CSET_GBCHR:
/* If UK-ASCII, make the '#' a LineDraw Pound */
if (c == '#')
return '}' | CSET_LINEDRW;
/* fall through */
case CSET_ASCII:
if (term->ucsdata->unitab_ctrl[c] != 0xFF)
return term->ucsdata->unitab_ctrl[c];
else
return c | CSET_ASCII;
break;
case CSET_SCOACS:
if (c >= ' ')
return c | CSET_SCOACS;
break;
}
}
return c;
}
/*
* 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;
size_t 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) {
ptrlen data = bufchain_prefix(&term->inbuf);
if (data.len > sizeof(localbuf))
data.len = sizeof(localbuf);
memcpy(localbuf, data.ptr, data.len);
bufchain_consume(&term->inbuf, data.len);
nchars = data.len;
chars = localbuf;
assert(chars != NULL);
assert(nchars > 0);
}
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;
}
}
/* Do character-set translation. */
if (term->termstate == TOPLEVEL) {
unsigned long t = term_translate(term, &term->utf8, c);
switch (t) {
case UCSINCOMPLETE:
continue; /* didn't complete a multibyte char */
case UCSTRUNCATED:
unget = c;
/* fall through */
case UCSINVALID:
c = UCSERR;
break;
default:
c = t;
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 = 0;
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) {
strbuf *buf = term_input_data_from_charset(
term, DEFAULT_CODEPAGE,
term->answerback, term->answerbacklen);
ldisc_send(term->ldisc, buf->s, buf->len, false);
strbuf_free(buf);
}
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) {
win_bell(term->win, 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))
/* 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 = 0;
}
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 */
term_display_graphic_char(term, c);
term->last_graphic_char = c;
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 = 0;
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)
ldisc_send(term->ldisc, term->id_string,
strlen(term->id_string), false);
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)
win_request_resize(term->win, 80, term->rows);
term->reset_132 = false;
}
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);
check_trust_status(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 = true;
break;
case ANSI('@', '%'):
compatibility(OTHER);
if (!term->no_remote_charset)
term->utf = false;
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 = 1;
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 'b': /* REP: repeat previous grap */
CLAMP(term->esc_args[0], term->rows * term->cols);
if (term->last_graphic_char) {
unsigned i;
for (i = 0; i < term->esc_args[0]; i++)
term_display_graphic_char(
term, term->last_graphic_char);
}
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,
false);
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)
ldisc_send(term->ldisc, term->id_string,
strlen(term->id_string), false);
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),
false);
} else if (term->esc_args[0] == 5) {
ldisc_send(term->ldisc, "\033[0n", 4, false);
}
}
break;
case 'h': /* SM: toggle modes to high */
case ANSI_QUE('h'):
compatibility(VT100);
for (int 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);
for (int 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.
*/
for (int 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 9: /* enable strikethrough */
term->curr_attr |= ATTR_STRIKE;
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 29: /* disable strikethrough */
term->curr_attr &= ~ATTR_STRIKE;
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)<<ATTR_FGSHIFT;
break;
case 90:
case 91:
case 92:
case 93:
case 94:
case 95:
case 96:
case 97:
/* aixterm-style bright foreground */
term->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)<<ATTR_BGSHIFT;
break;
case 100:
case 101:
case 102:
case 103:
case 104:
case 105:
case 106:
case 107:
/* aixterm-style bright background */
term->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)
win_request_resize(term->win, 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:
win_set_minimised(term->win, false);
break;
case 2:
win_set_minimised(term->win, true);
break;
case 3:
if (term->esc_nargs >= 3) {
if (!term->no_remote_resize)
win_move(term->win,
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 */
win_set_zorder(term->win, true);
break;
case 6:
/* move to bottom */
win_set_zorder(term->win, false);
break;
case 7:
win_refresh(term->win);
break;
case 8:
if (term->esc_nargs >= 3) {
if (!term->no_remote_resize)
win_request_resize(
term->win,
def(term->esc_args[2],
term->conf_width),
def(term->esc_args[1],
term->conf_height));
}
break;
case 9:
if (term->esc_nargs >= 2)
win_set_maximised(
term->win,
term->esc_args[1] ? true : false);
break;
case 11:
if (term->ldisc)
ldisc_send(term->ldisc,
win_is_minimised(term->win) ?
"\033[2t" : "\033[1t", 4,
false);
break;
case 13:
if (term->ldisc) {
win_get_pos(term->win, &x, &y);
len = sprintf(buf, "\033[3;%u;%ut",
(unsigned)x,
(unsigned)y);
ldisc_send(term->ldisc, buf, len, false);
}
break;
case 14:
if (term->ldisc) {
win_get_pixels(term->win, &x, &y);
len = sprintf(buf, "\033[4;%d;%dt", y, x);
ldisc_send(term->ldisc, buf, len, false);
}
break;
case 18:
if (term->ldisc) {
len = sprintf(buf, "\033[8;%d;%dt",
term->rows, term->cols);
ldisc_send(term->ldisc, buf, len, false);
}
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 = win_get_title(term->win, true);
else
p = EMPTY_WINDOW_TITLE;
len = strlen(p);
ldisc_send(term->ldisc, "\033]L", 3,
false);
ldisc_send(term->ldisc, p, len, false);
ldisc_send(term->ldisc, "\033\\", 2,
false);
}
break;
case 21:
if (term->ldisc &&
term->remote_qtitle_action != TITLE_NONE) {
if(term->remote_qtitle_action == TITLE_REAL)
p = win_get_title(term->win, false);
else
p = EMPTY_WINDOW_TITLE;
len = strlen(p);
ldisc_send(term->ldisc, "\033]l", 3,
false);
ldisc_send(term->ldisc, p, len, false);
ldisc_send(term->ldisc, "\033\\", 2,
false);
}
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)
win_request_resize(term->win, 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)
win_request_resize(
term->win,
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);
check_trust_status(term, cline);
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, false);
}
}
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)
win_request_resize(term->win, 132, 24);
else
win_request_resize(term->win, 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 */
win_palette_reset(term->win);
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) {
win_palette_set(
term->win, 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, false);
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 = true;
break;
case 'w': /* Autowrap off */
/* compatibility(ATARI) */
term->wrap = false;
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 bool term_bidi_cache_hit(Terminal *term, int line,
termchar *lbefore, int width, bool trusted)
{
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 */
if (term->pre_bidi_cache[line].trusted != trusted)
return false; /* line has wrong trust state */
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, bool trusted)
{
size_t i, j;
if (!term->pre_bidi_cache || term->bidi_cache_size <= line) {
j = term->bidi_cache_size;
sgrowarray(term->pre_bidi_cache, term->bidi_cache_size, line);
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].trusted = false;
term->post_bidi_cache[j].trusted = false;
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].trusted = trusted;
term->pre_bidi_cache[line].chars = snewn(size, termchar);
term->post_bidi_cache[line].width = width;
term->post_bidi_cache[line].trusted = trusted;
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 = j = 0; j < width; j += wcTo[i].nchars, i++) {
int p = wcTo[i].index;
if (p != BIDI_CHAR_INDEX_NONE) {
assert(0 <= p && p < width);
for (int x = 0; x < wcTo[i].nchars; x++) {
term->post_bidi_cache[line].backward[j+x] = p+x;
term->post_bidi_cache[line].forward[p+x] = j+x;
}
}
}
}
/*
* 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->no_bidi || !term->no_arabicshaping ||
(ldata->trusted && term->cols > TRUST_SIGIL_WIDTH)) {
if (!term_bidi_cache_hit(term, scr_y, ldata->chars, term->cols,
ldata->trusted)) {
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; it<term->cols ; 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;
term->wcFrom[it].nchars = 1;
}
if (ldata->trusted && term->cols > TRUST_SIGIL_WIDTH) {
memmove(
term->wcFrom + TRUST_SIGIL_WIDTH, term->wcFrom,
(term->cols - TRUST_SIGIL_WIDTH) * sizeof(*term->wcFrom));
for (it = 0; it < TRUST_SIGIL_WIDTH; it++) {
term->wcFrom[it].origwc = term->wcFrom[it].wc =
(it == 0 ? TRUST_SIGIL_CHAR :
it == 1 ? UCSWIDE : ' ');
term->wcFrom[it].index = BIDI_CHAR_INDEX_NONE;
term->wcFrom[it].nchars = 1;
}
}
int nbc = 0;
for (it = 0; it < term->cols; it++) {
term->wcFrom[nbc] = term->wcFrom[it];
if (it+1 < term->cols && term->wcFrom[it+1].wc == UCSWIDE) {
term->wcFrom[nbc].nchars++;
it++;
}
nbc++;
}
if(!term->no_bidi)
do_bidi(term->wcFrom, nbc);
if(!term->no_arabicshaping) {
do_shape(term->wcFrom, term->wcTo, nbc);
} else {
/* If we're not calling do_shape, we must copy the
* data into wcTo anyway, unchanged */
memcpy(term->wcTo, term->wcFrom, nbc * sizeof(*term->wcTo));
}
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);
int opos = 0;
for (it=0; it<nbc; it++) {
int ipos = term->wcTo[it].index;
for (int j = 0; j < term->wcTo[it].nchars; j++) {
if (ipos != BIDI_CHAR_INDEX_NONE) {
term->ltemp[opos] = ldata->chars[ipos];
if (term->ltemp[opos].cc_next)
term->ltemp[opos].cc_next -= opos - ipos;
if (j > 0)
term->ltemp[opos].chr = UCSWIDE;
else if (term->wcTo[it].origwc != term->wcTo[it].wc)
term->ltemp[opos].chr = term->wcTo[it].wc;
} else {
term->ltemp[opos] = term->basic_erase_char;
term->ltemp[opos].chr =
j > 0 ? UCSWIDE : term->wcTo[it].origwc;
}
opos++;
}
}
assert(opos == term->cols);
term_bidi_cache_store(term, scr_y, ldata->chars,
term->ltemp, term->wcTo,
term->cols, ldata->size, ldata->trusted);
lchars = term->ltemp;
} else {
lchars = term->post_bidi_cache[scr_y].chars;
}
} else {
lchars = NULL;
}
return lchars;
}
static void do_paint_draw(Terminal *term, termline *ldata, int x, int y,
wchar_t *ch, int ccount,
unsigned long attr, truecolour tc)
{
if (ch[0] == TRUST_SIGIL_CHAR) {
assert(ldata->trusted);
assert(ccount == 1);
assert(attr & ATTR_WIDE);
wchar_t tch[2];
tch[0] = tch[1] = L' ';
win_draw_text(term->win, x, y, tch, 2, term->basic_erase_char.attr,
ldata->lattr, term->basic_erase_char.truecolour);
win_draw_trust_sigil(term->win, x, y);
} else {
win_draw_text(term->win, x, y, ch, ccount, attr, ldata->lattr, tc);
if (attr & (TATTR_ACTCURS | TATTR_PASCURS))
win_draw_cursor(term->win, x, y, ch, ccount,
attr, ldata->lattr, tc);
}
}
/*
* Given a context, update the window.
*/
static void do_paint(Terminal *term)
{
int i, j, our_curs_y, our_curs_x;
int rv, cursor;
pos scrpos;
wchar_t *ch;
size_t chlen;
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;
/* The normal screen data */
for (i = 0; i < term->rows; i++) {
termline *ldata;
termchar *lchars;
bool dirty_line, dirty_run, selected;
unsigned long attr = 0, cset = 0;
int start = 0;
int ccount = 0;
bool last_run_dirty = false;
int laststart;
bool 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) &&
posPle_left(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 &&
win_char_width(term->win, 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;
bool 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;
/*
* Break on both sides of a trust sigil.
*/
if (d->chr == TRUST_SIGIL_CHAR ||
(j >= 2 && d[-1].chr == UCSWIDE &&
d[-2].chr == TRUST_SIGIL_CHAR))
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_paint_draw(term, ldata, start, i, ch, ccount, attr, 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;
}
sgrowarrayn(ch, chlen, ccount, 2);
#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;
}
sgrowarrayn(ch, chlen, ccount, 2);
#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_paint_draw(term, ldata, start, i, ch, ccount, attr, 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,
int left, int top, int right, int bottom, bool 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);
} 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);
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);
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 {
size_t bufsize; /* amount of allocated space in textbuf/attrbuf */
size_t 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->bufsize) {
sgrowarray(b->textbuf, b->bufsize, b->bufpos);
b->textptr = b->textbuf + b->bufpos;
b->attrbuf = sresize(b->attrbuf, b->bufsize, int);
b->attrptr = b->attrbuf + b->bufpos;
b->tcbuf = sresize(b->tcbuf, b->bufsize, 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, bool rect, bool desel,
const int *clipboards, int n_clipboards)
{
clip_workbuf buf;
int old_top_x;
int attr;
truecolour tc;
buf.bufsize = 5120;
buf.bufpos = 0;
buf.textptr = buf.textbuf = snewn(buf.bufsize, wchar_t);
buf.attrptr = buf.attrbuf = snewn(buf.bufsize, int);
buf.tcptr = buf.tcbuf = snewn(buf.bufsize, truecolour);
old_top_x = top.x; /* needed for rect==1 */
while (poslt(top, bottom)) {
bool 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->trusted) {
/* A wrapped line with a trust sigil on it terminates
* a few characters earlier. */
nlpos.x = (nlpos.x < TRUST_SIGIL_WIDTH ? 0 :
nlpos.x - TRUST_SIGIL_WIDTH);
}
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, "<U+%04x>", (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;
bool clip_local = false;
for (i = 0; i < n_clipboards; i++) {
if (clipboards[i] == CLIP_LOCAL) {
clip_local = true;
} else if (clipboards[i] != CLIP_NULL) {
win_clip_write(
term->win, 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, false, 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) {
win_clip_write(term->win, 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:
win_clip_request_paste(term->win, 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;
}
static int line_cols(Terminal *term, termline *ldata)
{
int cols = term->cols;
if (ldata->trusted) {
cols -= TRUST_SIGIL_WIDTH;
}
if (ldata->lattr & LATTR_WRAPPED2)
cols--;
if (cols < 0)
cols = 0;
return cols;
}
/*
* 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 + line_cols(term, ldata);
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 = line_cols(term, ldata);
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 = line_cols(term, ldata2);
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) {
strbuf *buf = term_input_data_from_unicode(
term, term->paste_buffer + term->paste_pos, n);
term_keyinput_internal(term, buf->s, buf->len, false);
strbuf_free(buf);
}
term->paste_pos += n;
if (term->paste_pos < term->paste_len) {
queue_toplevel_callback(term_paste_callback, term);
return;
}
}
term_bracketed_paste_stop(term);
sfree(term->paste_buffer);
term->paste_buffer = NULL;
term->paste_len = 0;
}
/*
* Specialist string compare function. Returns true if the buffer of
* alen wide characters starting at a has as a prefix the buffer of
* blen characters starting at b.
*/
static bool wstartswith(const wchar_t *a, size_t alen,
const wchar_t *b, size_t blen)
{
return alen >= blen && !wcsncmp(a, b, blen);
}
void term_do_paste(Terminal *term, const wchar_t *data, int len)
{
const wchar_t *p;
bool paste_controls = conf_get_bool(term->conf, CONF_paste_controls);
/*
* 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)
term_bracketed_paste_start(term);
p = data;
while (p < data + len) {
wchar_t wc = *p++;
if (wc == sel_nl[0] &&
wstartswith(p-1, data+len-(p-1), sel_nl, sel_nl_sz)) {
/*
* This is the (platform-dependent) sequence that the host
* OS uses to represent newlines in clipboard data.
* Normalise it to a press of CR.
*/
p += sel_nl_sz - 1;
wc = '\015';
}
if ((wc & ~(wint_t)0x9F) == 0) {
/*
* This is a control code, either in the range 0x00-0x1F
* or 0x80-0x9F. We reject all of these in pastecontrols
* mode, except for a small set of permitted ones.
*/
if (!paste_controls) {
/* In line with xterm 292, accepted control chars are:
* CR, LF, tab, backspace. (And DEL, i.e. 0x7F, but
* that's permitted by virtue of not matching the bit
* mask that got us into this if statement, so we
* don't have to permit it here. */
static const unsigned mask =
(1<<13) | (1<<10) | (1<<9) | (1<<8);
if (wc > 15 || !((mask >> wc) & 1))
continue;
}
if (wc == '\033' && term->bracketed_paste &&
wstartswith(p-1, data+len-(p-1), L"\033[201~", 6)) {
/*
* Also, in bracketed-paste mode, reject the ESC
* character that begins the end-of-paste sequence.
*/
continue;
}
}
term->paste_buffer[term->paste_len++] = wc;
}
/* Assume a small paste will be OK in one go. */
if (term->paste_len < 256) {
if (term->ldisc) {
strbuf *buf = term_input_data_from_unicode(
term, term->paste_buffer, term->paste_len);
term_keyinput_internal(term, buf->s, buf->len, false);
strbuf_free(buf);
}
if (term->paste_buffer)
sfree(term->paste_buffer);
term_bracketed_paste_stop(term);
term->paste_buffer = NULL;
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, bool shift, bool ctrl, bool alt)
{
pos selpoint;
termline *ldata;
bool 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;
bool 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, false);
}
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, bool ctrl)
{
char *p = buf;
if (term->vt52_mode)
p += sprintf(p, "\x1B%c", xkey);
else {
bool 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(p, "\x1BO%c", xkey);
else
p += sprintf(p, "\x1B[%c", xkey);
}
return p - buf;
}
int format_function_key(char *buf, Terminal *term, int key_number,
bool shift, bool ctrl)
{
char *p = buf;
static const int key_number_to_tilde_code[] = {
-1, /* no such key as F0 */
11, 12, 13, 14, 15, /*gap*/ 17, 18, 19, 20, 21, /*gap*/
23, 24, 25, 26, /*gap*/ 28, 29, /*gap*/ 31, 32, 33, 34,
};
assert(key_number > 0);
assert(key_number < lenof(key_number_to_tilde_code));
int index = (shift && key_number <= 10) ? key_number + 10 : key_number;
int code = key_number_to_tilde_code[index];
if (term->funky_type == FUNKY_SCO) {
/* SCO function keys */
static const char sco_codes[] =
"MNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@[\\]^_`{";
index = (key_number >= 1 && key_number <= 12) ? key_number - 1 : 0;
if (shift) index += 12;
if (ctrl) index += 24;
p += sprintf(p, "\x1B[%c", sco_codes[index]);
} else if ((term->vt52_mode || term->funky_type == FUNKY_VT100P) &&
code >= 11 && code <= 24) {
int offt = 0;
if (code > 15)
offt++;
if (code > 21)
offt++;
if (term->vt52_mode)
p += sprintf(p, "\x1B%c", code + 'P' - 11 - offt);
else
p += sprintf(p, "\x1BO%c", code + 'P' - 11 - offt);
} else if (term->funky_type == FUNKY_LINUX && code >= 11 && code <= 15) {
p += sprintf(p, "\x1B[[%c", code + 'A' - 11);
} else if (term->funky_type == FUNKY_XTERM && code >= 11 && code <= 14) {
if (term->vt52_mode)
p += sprintf(p, "\x1B%c", code + 'P' - 11);
else
p += sprintf(p, "\x1BO%c", code + 'P' - 11);
} else {
p += sprintf(p, "\x1B[%d~", code);
}
return p - buf;
}
int format_small_keypad_key(char *buf, Terminal *term, SmallKeypadKey key)
{
char *p = buf;
int code;
switch (key) {
case SKK_HOME: code = 1; break;
case SKK_INSERT: code = 2; break;
case SKK_DELETE: code = 3; break;
case SKK_END: code = 4; break;
case SKK_PGUP: code = 5; break;
case SKK_PGDN: code = 6; break;
default: unreachable("bad small keypad key enum value");
}
/* Reorder edit keys to physical order */
if (term->funky_type == FUNKY_VT400 && code <= 6)
code = "\0\2\1\4\5\3\6"[code];
if (term->vt52_mode && code > 0 && code <= 6) {
p += sprintf(p, "\x1B%c", " HLMEIG"[code]);
} else if (term->funky_type == FUNKY_SCO) {
static const char codes[] = "HL.FIG";
if (code == 3) {
*p++ = '\x7F';
} else {
p += sprintf(p, "\x1B[%c", codes[code-1]);
}
} else if ((code == 1 || code == 4) && term->rxvt_homeend) {
p += sprintf(p, code == 1 ? "\x1B[H" : "\x1BOw");
} else {
p += sprintf(p, "\x1B[%d~", code);
}
return p - buf;
}
int format_numeric_keypad_key(char *buf, Terminal *term, char key,
bool shift, bool ctrl)
{
char *p = buf;
bool app_keypad = (term->app_keypad_keys && !term->no_applic_k);
if (term->nethack_keypad && (key >= '1' && key <= '9')) {
static const char nh_base[] = "bjnh.lyku";
char c = nh_base[key - '1'];
if (ctrl && c != '.')
c &= 0x1F;
else if (shift && c != '.')
c += 'A'-'a';
*p++ = c;
} else {
int xkey = 0;
if (term->funky_type == FUNKY_VT400 ||
(term->funky_type <= FUNKY_LINUX && app_keypad)) {
switch (key) {
case 'G': xkey = 'P'; break;
case '/': xkey = 'Q'; break;
case '*': xkey = 'R'; break;
case '-': xkey = 'S'; break;
}
}
if (app_keypad) {
switch (key) {
case '0': xkey = 'p'; break;
case '1': xkey = 'q'; break;
case '2': xkey = 'r'; break;
case '3': xkey = 's'; break;
case '4': xkey = 't'; break;
case '5': xkey = 'u'; break;
case '6': xkey = 'v'; break;
case '7': xkey = 'w'; break;
case '8': xkey = 'x'; break;
case '9': xkey = 'y'; break;
case '.': xkey = 'n'; break;
case '\r': xkey = 'M'; break;
case '+':
/*
* Keypad + is tricky. It covers a space that would
* be taken up on the VT100 by _two_ keys; so we
* let Shift select between the two. Worse still,
* in xterm function key mode we change which two...
*/
if (term->funky_type == FUNKY_XTERM)
xkey = shift ? 'l' : 'k';
else
xkey = shift ? 'm' : 'l';
break;
case '/':
if (term->funky_type == FUNKY_XTERM)
xkey = 'o';
break;
case '*':
if (term->funky_type == FUNKY_XTERM)
xkey = 'j';
break;
case '-':
if (term->funky_type == FUNKY_XTERM)
xkey = 'm';
break;
}
}
if (xkey) {
if (term->vt52_mode) {
if (xkey >= 'P' && xkey <= 'S')
p += sprintf(p, "\x1B%c", xkey);
else
p += sprintf(p, "\x1B?%c", xkey);
} else
p += sprintf(p, "\x1BO%c", xkey);
}
}
return p - buf;
}
void term_keyinputw(Terminal *term, const wchar_t *widebuf, int len)
{
strbuf *buf = term_input_data_from_unicode(term, widebuf, len);
if (buf->len)
term_keyinput_internal(term, buf->s, buf->len, true);
strbuf_free(buf);
}
void term_keyinput(Terminal *term, int codepage, const void *str, int len)
{
if (codepage < 0 || codepage == term->ucsdata->line_codepage) {
/*
* This text needs no translation, either because it's already
* in the right character set, or because we got the special
* codepage value -1 from our caller which means 'this data
* should be charset-agnostic, just send it raw' (for really
* simple things like control characters).
*/
term_keyinput_internal(term, str, len, true);
} else {
strbuf *buf = term_input_data_from_charset(term, codepage, str, len);
if (buf->len)
term_keyinput_internal(term, buf->s, buf->len, true);
strbuf_free(buf);
}
}
void term_nopaste(Terminal *term)
{
if (term->paste_len == 0)
return;
sfree(term->paste_buffer);
term_bracketed_paste_stop(term);
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);
}
static void term_added_data(Terminal *term)
{
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;
}
}
size_t term_data(Terminal *term, bool is_stderr, const void *data, size_t len)
{
bufchain_add(&term->inbuf, data, len);
term_added_data(term);
/*
* 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;
}
void term_provide_logctx(Terminal *term, LogContext *logctx)
{
term->logctx = logctx;
}
void term_set_focus(Terminal *term, bool 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 = win_is_utf8(term->win) ? "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;
bool done_prompt; /* printed out prompt yet? */
};
/* Tiny wrapper to make it easier to write lots of little strings */
static inline void term_write(Terminal *term, ptrlen data)
{
term_data(term, false, data.ptr, data.len);
}
/*
* Process some terminal data in the course of username/password
* input.
*/
int term_get_userpass_input(Terminal *term, prompts_t *p, bufchain *input)
{
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 = false;
/* We only print the `name' caption if we have to... */
if (p->name_reqd && p->name) {
ptrlen plname = ptrlen_from_asciz(p->name);
term_write(term, plname);
if (!ptrlen_endswith(plname, PTRLEN_LITERAL("\n"), NULL))
term_write(term, PTRLEN_LITERAL("\r\n"));
}
/* ...but we always print any `instruction'. */
if (p->instruction) {
ptrlen plinst = ptrlen_from_asciz(p->instruction);
term_write(term, plinst);
if (!ptrlen_endswith(plinst, PTRLEN_LITERAL("\n"), NULL))
term_write(term, PTRLEN_LITERAL("\r\n"));
}
/*
* 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];
bool finished_prompt = false;
if (!s->done_prompt) {
term_write(term, ptrlen_from_asciz(pr->prompt));
s->done_prompt = true;
}
/* Breaking out here ensures that the prompt is printed even
* if we're now waiting for user data. */
if (!input || !bufchain_size(input)) break;
/* FIXME: should we be using local-line-editing code instead? */
while (!finished_prompt && bufchain_size(input) > 0) {
char c;
bufchain_fetch_consume(input, &c, 1);
switch (c) {
case 10:
case 13:
term_write(term, PTRLEN_LITERAL("\r\n"));
/* go to next prompt, if any */
s->curr_prompt++;
s->done_prompt = false;
finished_prompt = true; /* break out */
break;
case 8:
case 127:
if (pr->result->len > 0) {
if (pr->echo)
term_write(term, PTRLEN_LITERAL("\b \b"));
strbuf_shrink_by(pr->result, 1);
}
break;
case 21:
case 27:
while (pr->result->len > 0) {
if (pr->echo)
term_write(term, PTRLEN_LITERAL("\b \b"));
strbuf_shrink_by(pr->result, 1);
}
break;
case 3:
case 4:
/* Immediate abort. */
term_write(term, PTRLEN_LITERAL("\r\n"));
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)) {
put_byte(pr->result, c);
if (pr->echo)
term_write(term, make_ptrlen(&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 */
}
}
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