Permalink
Switch branches/tags
Nothing to show
Find file
Fetching contributors…
Cannot retrieve contributors at this time
6512 lines (6017 sloc) 181 KB
/*
* Terminal emulator.
*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <limits.h>
#include <time.h>
#include <assert.h>
#include "putty.h"
#include "terminal.h"
#define poslt(p1,p2) ( (p1).y < (p2).y || ( (p1).y == (p2).y && (p1).x < (p2).x ) )
#define posle(p1,p2) ( (p1).y < (p2).y || ( (p1).y == (p2).y && (p1).x <= (p2).x ) )
#define poseq(p1,p2) ( (p1).y == (p2).y && (p1).x == (p2).x )
#define posdiff(p1,p2) ( ((p1).y - (p2).y) * (term->cols+1) + (p1).x - (p2).x )
/* Product-order comparisons for rectangular block selection. */
#define posPlt(p1,p2) ( (p1).y <= (p2).y && (p1).x < (p2).x )
#define posPle(p1,p2) ( (p1).y <= (p2).y && (p1).x <= (p2).x )
#define incpos(p) ( (p).x == term->cols ? ((p).x = 0, (p).y++, 1) : ((p).x++, 0) )
#define decpos(p) ( (p).x == 0 ? ((p).x = term->cols, (p).y--, 1) : ((p).x--, 0) )
#define VT52_PLUS
#define CL_ANSIMIN 0x0001 /* Codes in all ANSI like terminals. */
#define CL_VT100 0x0002 /* VT100 */
#define CL_VT100AVO 0x0004 /* VT100 +AVO; 132x24 (not 132x14) & attrs */
#define CL_VT102 0x0008 /* VT102 */
#define CL_VT220 0x0010 /* VT220 */
#define CL_VT320 0x0020 /* VT320 */
#define CL_VT420 0x0040 /* VT420 */
#define CL_VT510 0x0080 /* VT510, NB VT510 includes ANSI */
#define CL_VT340TEXT 0x0100 /* VT340 extensions that appear in the VT420 */
#define CL_SCOANSI 0x1000 /* SCOANSI not in ANSIMIN. */
#define CL_ANSI 0x2000 /* ANSI ECMA-48 not in the VT100..VT420 */
#define CL_OTHER 0x4000 /* Others, Xterm, linux, putty, dunno, etc */
#define TM_VT100 (CL_ANSIMIN|CL_VT100)
#define TM_VT100AVO (TM_VT100|CL_VT100AVO)
#define TM_VT102 (TM_VT100AVO|CL_VT102)
#define TM_VT220 (TM_VT102|CL_VT220)
#define TM_VTXXX (TM_VT220|CL_VT340TEXT|CL_VT510|CL_VT420|CL_VT320)
#define TM_SCOANSI (CL_ANSIMIN|CL_SCOANSI)
#define TM_PUTTY (0xFFFF)
#define UPDATE_DELAY ((TICKSPERSEC+49)/50)/* ticks to defer window update */
#define TBLINK_DELAY ((TICKSPERSEC*9+19)/20)/* ticks between text blinks*/
#define CBLINK_DELAY (CURSORBLINK) /* ticks between cursor blinks */
#define VBELL_DELAY (VBELL_TIMEOUT) /* visual bell timeout in ticks */
#define compatibility(x) \
if ( ((CL_##x)&term->compatibility_level) == 0 ) { \
term->termstate=TOPLEVEL; \
break; \
}
#define compatibility2(x,y) \
if ( ((CL_##x|CL_##y)&term->compatibility_level) == 0 ) { \
term->termstate=TOPLEVEL; \
break; \
}
#define has_compat(x) ( ((CL_##x)&term->compatibility_level) != 0 )
const char *EMPTY_WINDOW_TITLE = "";
const char sco2ansicolour[] = { 0, 4, 2, 6, 1, 5, 3, 7 };
#define sel_nl_sz (sizeof(sel_nl)/sizeof(wchar_t))
const wchar_t sel_nl[] = SEL_NL;
/*
* Fetch the character at a particular position in a line array,
* for purposes of `wordtype'. The reason this isn't just a simple
* array reference is that if the character we find is UCSWIDE,
* then we must look one space further to the left.
*/
#define UCSGET(a, x) \
( (x)>0 && (a)[(x)].chr == UCSWIDE ? (a)[(x)-1].chr : (a)[(x)].chr )
/*
* Detect the various aliases of U+0020 SPACE.
*/
#define IS_SPACE_CHR(chr) \
((chr) == 0x20 || (DIRECT_CHAR(chr) && ((chr) & 0xFF) == 0x20))
/*
* Spot magic CSETs.
*/
#define CSET_OF(chr) (DIRECT_CHAR(chr)||DIRECT_FONT(chr) ? (chr)&CSET_MASK : 0)
/*
* Internal prototypes.
*/
static void resizeline(Terminal *, termline *, int);
static termline *lineptr(Terminal *, int, int, int);
static void unlineptr(termline *);
static void check_line_size(Terminal *, termline *);
static void do_paint(Terminal *, Context, int);
static void erase_lots(Terminal *, int, int, int);
static int find_last_nonempty_line(Terminal *, tree234 *);
static void swap_screen(Terminal *, int, int, int);
static void update_sbar(Terminal *);
static void deselect(Terminal *);
static void term_print_finish(Terminal *);
static void scroll(Terminal *, int, int, int, int);
#ifdef OPTIMISE_SCROLL
static void scroll_display(Terminal *, int, int, int);
#endif /* OPTIMISE_SCROLL */
static termline *newline(Terminal *term, int cols, int bce)
{
termline *line;
int j;
line = snew(termline);
line->chars = snewn(cols, termchar);
for (j = 0; j < cols; j++)
line->chars[j] = (bce ? term->erase_char : term->basic_erase_char);
line->cols = line->size = cols;
line->lattr = LATTR_NORM;
line->temporary = FALSE;
line->cc_free = 0;
return line;
}
static void freeline(termline *line)
{
if (line) {
sfree(line->chars);
sfree(line);
}
}
static void unlineptr(termline *line)
{
if (line->temporary)
freeline(line);
}
#ifdef TERM_CC_DIAGS
/*
* Diagnostic function: verify that a termline has a correct
* combining character structure.
*
* This is a performance-intensive check, so it's no longer enabled
* by default.
*/
static void cc_check(termline *line)
{
unsigned char *flags;
int i, j;
assert(line->size >= line->cols);
flags = snewn(line->size, unsigned char);
for (i = 0; i < line->size; i++)
flags[i] = (i < line->cols);
for (i = 0; i < line->cols; i++) {
j = i;
while (line->chars[j].cc_next) {
j += line->chars[j].cc_next;
assert(j >= line->cols && j < line->size);
assert(!flags[j]);
flags[j] = TRUE;
}
}
j = line->cc_free;
if (j) {
while (1) {
assert(j >= line->cols && j < line->size);
assert(!flags[j]);
flags[j] = TRUE;
if (line->chars[j].cc_next)
j += line->chars[j].cc_next;
else
break;
}
}
j = 0;
for (i = 0; i < line->size; i++)
j += (flags[i] != 0);
assert(j == line->size);
sfree(flags);
}
#endif
/*
* Add a combining character to a character cell.
*/
static void add_cc(termline *line, int col, unsigned long chr)
{
int newcc;
assert(col >= 0 && col < line->cols);
/*
* Start by extending the cols array if the free list is empty.
*/
if (!line->cc_free) {
int n = line->size;
line->size += 16 + (line->size - line->cols) / 2;
line->chars = sresize(line->chars, line->size, termchar);
line->cc_free = n;
while (n < line->size) {
if (n+1 < line->size)
line->chars[n].cc_next = 1;
else
line->chars[n].cc_next = 0;
n++;
}
}
/*
* Now walk the cc list of the cell in question.
*/
while (line->chars[col].cc_next)
col += line->chars[col].cc_next;
/*
* `col' now points at the last cc currently in this cell; so
* we simply add another one.
*/
newcc = line->cc_free;
if (line->chars[newcc].cc_next)
line->cc_free = newcc + line->chars[newcc].cc_next;
else
line->cc_free = 0;
line->chars[newcc].cc_next = 0;
line->chars[newcc].chr = chr;
line->chars[col].cc_next = newcc - col;
#ifdef TERM_CC_DIAGS
cc_check(line);
#endif
}
/*
* Clear the combining character list in a character cell.
*/
static void clear_cc(termline *line, int col)
{
int oldfree, origcol = col;
assert(col >= 0 && col < line->cols);
if (!line->chars[col].cc_next)
return; /* nothing needs doing */
oldfree = line->cc_free;
line->cc_free = col + line->chars[col].cc_next;
while (line->chars[col].cc_next)
col += line->chars[col].cc_next;
if (oldfree)
line->chars[col].cc_next = oldfree - col;
else
line->chars[col].cc_next = 0;
line->chars[origcol].cc_next = 0;
#ifdef TERM_CC_DIAGS
cc_check(line);
#endif
}
/*
* Compare two character cells for equality. Special case required
* in do_paint() where we override what we expect the chr and attr
* fields to be.
*/
static int termchars_equal_override(termchar *a, termchar *b,
unsigned long bchr, unsigned long battr)
{
/* FULL-TERMCHAR */
if (a->chr != bchr)
return FALSE;
if ((a->attr &~ DATTR_MASK) != (battr &~ DATTR_MASK))
return FALSE;
while (a->cc_next || b->cc_next) {
if (!a->cc_next || !b->cc_next)
return FALSE; /* one cc-list ends, other does not */
a += a->cc_next;
b += b->cc_next;
if (a->chr != b->chr)
return FALSE;
}
return TRUE;
}
static int termchars_equal(termchar *a, termchar *b)
{
return termchars_equal_override(a, b, b->chr, b->attr);
}
/*
* Copy a character cell. (Requires a pointer to the destination
* termline, so as to access its free list.)
*/
static void copy_termchar(termline *destline, int x, termchar *src)
{
clear_cc(destline, x);
destline->chars[x] = *src; /* copy everything except cc-list */
destline->chars[x].cc_next = 0; /* and make sure this is zero */
while (src->cc_next) {
src += src->cc_next;
add_cc(destline, x, src->chr);
}
#ifdef TERM_CC_DIAGS
cc_check(destline);
#endif
}
/*
* Move a character cell within its termline.
*/
static void move_termchar(termline *line, termchar *dest, termchar *src)
{
/* First clear the cc list from the original char, just in case. */
clear_cc(line, dest - line->chars);
/* Move the character cell and adjust its cc_next. */
*dest = *src; /* copy everything except cc-list */
if (src->cc_next)
dest->cc_next = src->cc_next - (dest-src);
/* Ensure the original cell doesn't have a cc list. */
src->cc_next = 0;
#ifdef TERM_CC_DIAGS
cc_check(line);
#endif
}
/*
* Compress and decompress a termline into an RLE-based format for
* storing in scrollback. (Since scrollback almost never needs to
* be modified and exists in huge quantities, this is a sensible
* tradeoff, particularly since it allows us to continue adding
* features to the main termchar structure without proportionally
* bloating the terminal emulator's memory footprint unless those
* features are in constant use.)
*/
struct buf {
unsigned char *data;
int len, size;
};
static void add(struct buf *b, unsigned char c)
{
if (b->len >= b->size) {
b->size = (b->len * 3 / 2) + 512;
b->data = sresize(b->data, b->size, unsigned char);
}
b->data[b->len++] = c;
}
static int get(struct buf *b)
{
return b->data[b->len++];
}
static void makerle(struct buf *b, termline *ldata,
void (*makeliteral)(struct buf *b, termchar *c,
unsigned long *state))
{
int hdrpos, hdrsize, n, prevlen, prevpos, thislen, thispos, prev2;
termchar *c = ldata->chars;
unsigned long state = 0, oldstate;
n = ldata->cols;
hdrpos = b->len;
hdrsize = 0;
add(b, 0);
prevlen = prevpos = 0;
prev2 = FALSE;
while (n-- > 0) {
thispos = b->len;
makeliteral(b, c++, &state);
thislen = b->len - thispos;
if (thislen == prevlen &&
!memcmp(b->data + prevpos, b->data + thispos, thislen)) {
/*
* This literal precisely matches the previous one.
* Turn it into a run if it's worthwhile.
*
* With one-byte literals, it costs us two bytes to
* encode a run, plus another byte to write the header
* to resume normal output; so a three-element run is
* neutral, and anything beyond that is unconditionally
* worthwhile. With two-byte literals or more, even a
* 2-run is a win.
*/
if (thislen > 1 || prev2) {
int runpos, runlen;
/*
* It's worth encoding a run. Start at prevpos,
* unless hdrsize==0 in which case we can back up
* another one and start by overwriting hdrpos.
*/
hdrsize--; /* remove the literal at prevpos */
if (prev2) {
assert(hdrsize > 0);
hdrsize--;
prevpos -= prevlen;/* and possibly another one */
}
if (hdrsize == 0) {
assert(prevpos == hdrpos + 1);
runpos = hdrpos;
b->len = prevpos+prevlen;
} else {
memmove(b->data + prevpos+1, b->data + prevpos, prevlen);
runpos = prevpos;
b->len = prevpos+prevlen+1;
/*
* Terminate the previous run of ordinary
* literals.
*/
assert(hdrsize >= 1 && hdrsize <= 128);
b->data[hdrpos] = hdrsize - 1;
}
runlen = prev2 ? 3 : 2;
while (n > 0 && runlen < 129) {
int tmppos, tmplen;
tmppos = b->len;
oldstate = state;
makeliteral(b, c, &state);
tmplen = b->len - tmppos;
b->len = tmppos;
if (tmplen != thislen ||
memcmp(b->data + runpos+1, b->data + tmppos, tmplen)) {
state = oldstate;
break; /* run over */
}
n--, c++, runlen++;
}
assert(runlen >= 2 && runlen <= 129);
b->data[runpos] = runlen + 0x80 - 2;
hdrpos = b->len;
hdrsize = 0;
add(b, 0);
/* And ensure this run doesn't interfere with the next. */
prevlen = prevpos = 0;
prev2 = FALSE;
continue;
} else {
/*
* Just flag that the previous two literals were
* identical, in case we find a third identical one
* we want to turn into a run.
*/
prev2 = TRUE;
prevlen = thislen;
prevpos = thispos;
}
} else {
prev2 = FALSE;
prevlen = thislen;
prevpos = thispos;
}
/*
* This character isn't (yet) part of a run. Add it to
* hdrsize.
*/
hdrsize++;
if (hdrsize == 128) {
b->data[hdrpos] = hdrsize - 1;
hdrpos = b->len;
hdrsize = 0;
add(b, 0);
prevlen = prevpos = 0;
prev2 = FALSE;
}
}
/*
* Clean up.
*/
if (hdrsize > 0) {
assert(hdrsize <= 128);
b->data[hdrpos] = hdrsize - 1;
} else {
b->len = hdrpos;
}
}
static void makeliteral_chr(struct buf *b, termchar *c, unsigned long *state)
{
/*
* My encoding for characters is UTF-8-like, in that it stores
* 7-bit ASCII in one byte and uses high-bit-set bytes as
* introducers to indicate a longer sequence. However, it's
* unlike UTF-8 in that it doesn't need to be able to
* resynchronise, and therefore I don't want to waste two bits
* per byte on having recognisable continuation characters.
* Also I don't want to rule out the possibility that I may one
* day use values 0x80000000-0xFFFFFFFF for interesting
* purposes, so unlike UTF-8 I need a full 32-bit range.
* Accordingly, here is my encoding:
*
* 00000000-0000007F: 0xxxxxxx (but see below)
* 00000080-00003FFF: 10xxxxxx xxxxxxxx
* 00004000-001FFFFF: 110xxxxx xxxxxxxx xxxxxxxx
* 00200000-0FFFFFFF: 1110xxxx xxxxxxxx xxxxxxxx xxxxxxxx
* 10000000-FFFFFFFF: 11110ZZZ xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx
*
* (`Z' is like `x' but is always going to be zero since the
* values I'm encoding don't go above 2^32. In principle the
* five-byte form of the encoding could extend to 2^35, and
* there could be six-, seven-, eight- and nine-byte forms as
* well to allow up to 64-bit values to be encoded. But that's
* completely unnecessary for these purposes!)
*
* The encoding as written above would be very simple, except
* that 7-bit ASCII can occur in several different ways in the
* terminal data; sometimes it crops up in the D800 page
* (CSET_ASCII) but at other times it's in the 0000 page (real
* Unicode). Therefore, this encoding is actually _stateful_:
* the one-byte encoding of 00-7F actually indicates `reuse the
* upper three bytes of the last character', and to encode an
* absolute value of 00-7F you need to use the two-byte form
* instead.
*/
if ((c->chr & ~0x7F) == *state) {
add(b, (unsigned char)(c->chr & 0x7F));
} else if (c->chr < 0x4000) {
add(b, (unsigned char)(((c->chr >> 8) & 0x3F) | 0x80));
add(b, (unsigned char)(c->chr & 0xFF));
} else if (c->chr < 0x200000) {
add(b, (unsigned char)(((c->chr >> 16) & 0x1F) | 0xC0));
add(b, (unsigned char)((c->chr >> 8) & 0xFF));
add(b, (unsigned char)(c->chr & 0xFF));
} else if (c->chr < 0x10000000) {
add(b, (unsigned char)(((c->chr >> 24) & 0x0F) | 0xE0));
add(b, (unsigned char)((c->chr >> 16) & 0xFF));
add(b, (unsigned char)((c->chr >> 8) & 0xFF));
add(b, (unsigned char)(c->chr & 0xFF));
} else {
add(b, 0xF0);
add(b, (unsigned char)((c->chr >> 24) & 0xFF));
add(b, (unsigned char)((c->chr >> 16) & 0xFF));
add(b, (unsigned char)((c->chr >> 8) & 0xFF));
add(b, (unsigned char)(c->chr & 0xFF));
}
*state = c->chr & ~0xFF;
}
static void makeliteral_attr(struct buf *b, termchar *c, unsigned long *state)
{
/*
* My encoding for attributes is 16-bit-granular and assumes
* that the top bit of the word is never required. I either
* store a two-byte value with the top bit clear (indicating
* just that value), or a four-byte value with the top bit set
* (indicating the same value with its top bit clear).
*
* However, first I permute the bits of the attribute value, so
* that the eight bits of colour (four in each of fg and bg)
* which are never non-zero unless xterm 256-colour mode is in
* use are placed higher up the word than everything else. This
* ensures that attribute values remain 16-bit _unless_ the
* user uses extended colour.
*/
unsigned attr, colourbits;
attr = c->attr;
assert(ATTR_BGSHIFT > ATTR_FGSHIFT);
colourbits = (attr >> (ATTR_BGSHIFT + 4)) & 0xF;
colourbits <<= 4;
colourbits |= (attr >> (ATTR_FGSHIFT + 4)) & 0xF;
attr = (((attr >> (ATTR_BGSHIFT + 8)) << (ATTR_BGSHIFT + 4)) |
(attr & ((1 << (ATTR_BGSHIFT + 4))-1)));
attr = (((attr >> (ATTR_FGSHIFT + 8)) << (ATTR_FGSHIFT + 4)) |
(attr & ((1 << (ATTR_FGSHIFT + 4))-1)));
attr |= (colourbits << (32-9));
if (attr < 0x8000) {
add(b, (unsigned char)((attr >> 8) & 0xFF));
add(b, (unsigned char)(attr & 0xFF));
} else {
add(b, (unsigned char)(((attr >> 24) & 0x7F) | 0x80));
add(b, (unsigned char)((attr >> 16) & 0xFF));
add(b, (unsigned char)((attr >> 8) & 0xFF));
add(b, (unsigned char)(attr & 0xFF));
}
}
static void makeliteral_cc(struct buf *b, termchar *c, unsigned long *state)
{
/*
* For combining characters, I just encode a bunch of ordinary
* chars using makeliteral_chr, and terminate with a \0
* character (which I know won't come up as a combining char
* itself).
*
* I don't use the stateful encoding in makeliteral_chr.
*/
unsigned long zstate;
termchar z;
while (c->cc_next) {
c += c->cc_next;
assert(c->chr != 0);
zstate = 0;
makeliteral_chr(b, c, &zstate);
}
z.chr = 0;
zstate = 0;
makeliteral_chr(b, &z, &zstate);
}
static termline *decompressline(unsigned char *data, int *bytes_used);
static unsigned char *compressline(termline *ldata)
{
struct buf buffer = { NULL, 0, 0 }, *b = &buffer;
/*
* First, store the column count, 7 bits at a time, least
* significant `digit' first, with the high bit set on all but
* the last.
*/
{
int n = ldata->cols;
while (n >= 128) {
add(b, (unsigned char)((n & 0x7F) | 0x80));
n >>= 7;
}
add(b, (unsigned char)(n));
}
/*
* Next store the lattrs; same principle.
*/
{
int n = ldata->lattr;
while (n >= 128) {
add(b, (unsigned char)((n & 0x7F) | 0x80));
n >>= 7;
}
add(b, (unsigned char)(n));
}
/*
* Now we store a sequence of separate run-length encoded
* fragments, each containing exactly as many symbols as there
* are columns in the ldata.
*
* All of these have a common basic format:
*
* - a byte 00-7F indicates that X+1 literals follow it
* - a byte 80-FF indicates that a single literal follows it
* and expects to be repeated (X-0x80)+2 times.
*
* The format of the `literals' varies between the fragments.
*/
makerle(b, ldata, makeliteral_chr);
makerle(b, ldata, makeliteral_attr);
makerle(b, ldata, makeliteral_cc);
/*
* Diagnostics: ensure that the compressed data really does
* decompress to the right thing.
*
* This is a bit performance-heavy for production code.
*/
#ifdef TERM_CC_DIAGS
#ifndef CHECK_SB_COMPRESSION
{
int dused;
termline *dcl;
int i;
#ifdef DIAGNOSTIC_SB_COMPRESSION
for (i = 0; i < b->len; i++) {
printf(" %02x ", b->data[i]);
}
printf("\n");
#endif
dcl = decompressline(b->data, &dused);
assert(b->len == dused);
assert(ldata->cols == dcl->cols);
assert(ldata->lattr == dcl->lattr);
for (i = 0; i < ldata->cols; i++)
assert(termchars_equal(&ldata->chars[i], &dcl->chars[i]));
#ifdef DIAGNOSTIC_SB_COMPRESSION
printf("%d cols (%d bytes) -> %d bytes (factor of %g)\n",
ldata->cols, 4 * ldata->cols, dused,
(double)dused / (4 * ldata->cols));
#endif
freeline(dcl);
}
#endif
#endif /* TERM_CC_DIAGS */
/*
* Trim the allocated memory so we don't waste any, and return.
*/
return sresize(b->data, b->len, unsigned char);
}
static void readrle(struct buf *b, termline *ldata,
void (*readliteral)(struct buf *b, termchar *c,
termline *ldata, unsigned long *state))
{
int n = 0;
unsigned long state = 0;
while (n < ldata->cols) {
int hdr = get(b);
if (hdr >= 0x80) {
/* A run. */
int pos = b->len, count = hdr + 2 - 0x80;
while (count--) {
assert(n < ldata->cols);
b->len = pos;
readliteral(b, ldata->chars + n, ldata, &state);
n++;
}
} else {
/* Just a sequence of consecutive literals. */
int count = hdr + 1;
while (count--) {
assert(n < ldata->cols);
readliteral(b, ldata->chars + n, ldata, &state);
n++;
}
}
}
assert(n == ldata->cols);
}
static void readliteral_chr(struct buf *b, termchar *c, termline *ldata,
unsigned long *state)
{
int byte;
/*
* 00000000-0000007F: 0xxxxxxx
* 00000080-00003FFF: 10xxxxxx xxxxxxxx
* 00004000-001FFFFF: 110xxxxx xxxxxxxx xxxxxxxx
* 00200000-0FFFFFFF: 1110xxxx xxxxxxxx xxxxxxxx xxxxxxxx
* 10000000-FFFFFFFF: 11110ZZZ xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx
*/
byte = get(b);
if (byte < 0x80) {
c->chr = byte | *state;
} else if (byte < 0xC0) {
c->chr = (byte &~ 0xC0) << 8;
c->chr |= get(b);
} else if (byte < 0xE0) {
c->chr = (byte &~ 0xE0) << 16;
c->chr |= get(b) << 8;
c->chr |= get(b);
} else if (byte < 0xF0) {
c->chr = (byte &~ 0xF0) << 24;
c->chr |= get(b) << 16;
c->chr |= get(b) << 8;
c->chr |= get(b);
} else {
assert(byte == 0xF0);
c->chr = get(b) << 24;
c->chr |= get(b) << 16;
c->chr |= get(b) << 8;
c->chr |= get(b);
}
*state = c->chr & ~0xFF;
}
static void readliteral_attr(struct buf *b, termchar *c, termline *ldata,
unsigned long *state)
{
unsigned val, attr, colourbits;
val = get(b) << 8;
val |= get(b);
if (val >= 0x8000) {
val &= ~0x8000;
val <<= 16;
val |= get(b) << 8;
val |= get(b);
}
colourbits = (val >> (32-9)) & 0xFF;
attr = (val & ((1<<(32-9))-1));
attr = (((attr >> (ATTR_FGSHIFT + 4)) << (ATTR_FGSHIFT + 8)) |
(attr & ((1 << (ATTR_FGSHIFT + 4))-1)));
attr = (((attr >> (ATTR_BGSHIFT + 4)) << (ATTR_BGSHIFT + 8)) |
(attr & ((1 << (ATTR_BGSHIFT + 4))-1)));
attr |= (colourbits >> 4) << (ATTR_BGSHIFT + 4);
attr |= (colourbits & 0xF) << (ATTR_FGSHIFT + 4);
c->attr = attr;
}
static void readliteral_cc(struct buf *b, termchar *c, termline *ldata,
unsigned long *state)
{
termchar n;
unsigned long zstate;
int x = c - ldata->chars;
c->cc_next = 0;
while (1) {
zstate = 0;
readliteral_chr(b, &n, ldata, &zstate);
if (!n.chr)
break;
add_cc(ldata, x, n.chr);
}
}
static termline *decompressline(unsigned char *data, int *bytes_used)
{
int ncols, byte, shift;
struct buf buffer, *b = &buffer;
termline *ldata;
b->data = data;
b->len = 0;
/*
* First read in the column count.
*/
ncols = shift = 0;
do {
byte = get(b);
ncols |= (byte & 0x7F) << shift;
shift += 7;
} while (byte & 0x80);
/*
* Now create the output termline.
*/
ldata = snew(termline);
ldata->chars = snewn(ncols, termchar);
ldata->cols = ldata->size = ncols;
ldata->temporary = TRUE;
ldata->cc_free = 0;
/*
* We must set all the cc pointers in ldata->chars to 0 right
* now, so that cc diagnostics that verify the integrity of the
* whole line will make sense while we're in the middle of
* building it up.
*/
{
int i;
for (i = 0; i < ldata->cols; i++)
ldata->chars[i].cc_next = 0;
}
/*
* Now read in the lattr.
*/
ldata->lattr = shift = 0;
do {
byte = get(b);
ldata->lattr |= (byte & 0x7F) << shift;
shift += 7;
} while (byte & 0x80);
/*
* Now we read in each of the RLE streams in turn.
*/
readrle(b, ldata, readliteral_chr);
readrle(b, ldata, readliteral_attr);
readrle(b, ldata, readliteral_cc);
/* Return the number of bytes read, for diagnostic purposes. */
if (bytes_used)
*bytes_used = b->len;
return ldata;
}
/*
* Resize a line to make it `cols' columns wide.
*/
static void resizeline(Terminal *term, termline *line, int cols)
{
int i, oldcols;
if (line->cols != cols) {
oldcols = line->cols;
/*
* This line is the wrong length, which probably means it
* hasn't been accessed since a resize. Resize it now.
*
* First, go through all the characters that will be thrown
* out in the resize (if we're shrinking the line) and
* return their cc lists to the cc free list.
*/
for (i = cols; i < oldcols; i++)
clear_cc(line, i);
/*
* If we're shrinking the line, we now bodily move the
* entire cc section from where it started to where it now
* needs to be. (We have to do this before the resize, so
* that the data we're copying is still there. However, if
* we're expanding, we have to wait until _after_ the
* resize so that the space we're copying into is there.)
*/
if (cols < oldcols)
memmove(line->chars + cols, line->chars + oldcols,
(line->size - line->cols) * TSIZE);
/*
* Now do the actual resize, leaving the _same_ amount of
* cc space as there was to begin with.
*/
line->size += cols - oldcols;
line->chars = sresize(line->chars, line->size, TTYPE);
line->cols = cols;
/*
* If we're expanding the line, _now_ we move the cc
* section.
*/
if (cols > oldcols)
memmove(line->chars + cols, line->chars + oldcols,
(line->size - line->cols) * TSIZE);
/*
* Go through what's left of the original line, and adjust
* the first cc_next pointer in each list. (All the
* subsequent ones are still valid because they are
* relative offsets within the cc block.) Also do the same
* to the head of the cc_free list.
*/
for (i = 0; i < oldcols && i < cols; i++)
if (line->chars[i].cc_next)
line->chars[i].cc_next += cols - oldcols;
if (line->cc_free)
line->cc_free += cols - oldcols;
/*
* And finally fill in the new space with erase chars. (We
* don't have to worry about cc lists here, because we
* _know_ the erase char doesn't have one.)
*/
for (i = oldcols; i < cols; i++)
line->chars[i] = term->basic_erase_char;
#ifdef TERM_CC_DIAGS
cc_check(line);
#endif
}
}
/*
* Get the number of lines in the scrollback.
*/
static int sblines(Terminal *term)
{
int sblines = count234(term->scrollback);
if (term->erase_to_scrollback &&
term->alt_which && term->alt_screen) {
sblines += term->alt_sblines;
}
return sblines;
}
/*
* Retrieve a line of the screen or of the scrollback, according to
* whether the y coordinate is non-negative or negative
* (respectively).
*/
static termline *lineptr(Terminal *term, int y, int lineno, int screen)
{
termline *line;
tree234 *whichtree;
int treeindex;
if (y >= 0) {
whichtree = term->screen;
treeindex = y;
} else {
int altlines = 0;
assert(!screen);
if (term->erase_to_scrollback &&
term->alt_which && term->alt_screen) {
altlines = term->alt_sblines;
}
if (y < -altlines) {
whichtree = term->scrollback;
treeindex = y + altlines + count234(term->scrollback);
} else {
whichtree = term->alt_screen;
treeindex = y + term->alt_sblines;
/* treeindex = y + count234(term->alt_screen); */
}
}
if (whichtree == term->scrollback) {
unsigned char *cline = index234(whichtree, treeindex);
line = decompressline(cline, NULL);
} else {
line = index234(whichtree, treeindex);
}
/* We assume that we don't screw up and retrieve something out of range. */
if (line == NULL) {
fatalbox("line==NULL in terminal.c\n"
"lineno=%d y=%d w=%d h=%d\n"
"count(scrollback=%p)=%d\n"
"count(screen=%p)=%d\n"
"count(alt=%p)=%d alt_sblines=%d\n"
"whichtree=%p treeindex=%d\n\n"
"Please contact <putty@projects.tartarus.org> "
"and pass on the above information.",
lineno, y, term->cols, term->rows,
term->scrollback, count234(term->scrollback),
term->screen, count234(term->screen),
term->alt_screen, count234(term->alt_screen), term->alt_sblines,
whichtree, treeindex);
}
assert(line != NULL);
/*
* Here we resize lines to _at least_ the right length, but we
* don't truncate them. Truncation is done as a side effect of
* modifying the line.
*
* The point of this policy is to try to arrange that resizing the
* terminal window repeatedly - e.g. successive steps in an X11
* opaque window-resize drag, or resizing as a side effect of
* retiling by tiling WMs such as xmonad - does not throw away
* data gratuitously. Specifically, we want a sequence of resize
* operations with no terminal output between them to have the
* same effect as a single resize to the ultimate terminal size,
* and also (for the case in which xmonad narrows a window that's
* scrolling things) we want scrolling up new text at the bottom
* of a narrowed window to avoid truncating lines further up when
* the window is re-widened.
*/
if (term->cols > line->cols)
resizeline(term, line, term->cols);
return line;
}
#define lineptr(x) (lineptr)(term,x,__LINE__,FALSE)
#define scrlineptr(x) (lineptr)(term,x,__LINE__,TRUE)
/*
* Coerce a termline to the terminal's current width. Unlike the
* optional resize in lineptr() above, this is potentially destructive
* of text, since it can shrink as well as grow the line.
*
* We call this whenever a termline is actually going to be modified.
* Helpfully, putting a single call to this function in check_boundary
* deals with _nearly_ all such cases, leaving only a few things like
* bulk erase and ESC#8 to handle separately.
*/
static void check_line_size(Terminal *term, termline *line)
{
if (term->cols != line->cols) /* trivial optimisation */
resizeline(term, line, term->cols);
}
static void term_schedule_tblink(Terminal *term);
static void term_schedule_cblink(Terminal *term);
static void term_timer(void *ctx, unsigned long now)
{
Terminal *term = (Terminal *)ctx;
int update = FALSE;
if (term->tblink_pending && now == term->next_tblink) {
term->tblinker = !term->tblinker;
term->tblink_pending = FALSE;
term_schedule_tblink(term);
update = TRUE;
}
if (term->cblink_pending && now == term->next_cblink) {
term->cblinker = !term->cblinker;
term->cblink_pending = FALSE;
term_schedule_cblink(term);
update = TRUE;
}
if (term->in_vbell && now == term->vbell_end) {
term->in_vbell = FALSE;
update = TRUE;
}
if (update ||
(term->window_update_pending && now == term->next_update))
term_update(term);
}
static void term_schedule_update(Terminal *term)
{
if (!term->window_update_pending) {
term->window_update_pending = TRUE;
term->next_update = schedule_timer(UPDATE_DELAY, term_timer, term);
}
}
/*
* Call this whenever the terminal window state changes, to queue
* an update.
*/
static void seen_disp_event(Terminal *term)
{
term->seen_disp_event = TRUE; /* for scrollback-reset-on-activity */
term_schedule_update(term);
}
/*
* Call when the terminal's blinking-text settings change, or when
* a text blink has just occurred.
*/
static void term_schedule_tblink(Terminal *term)
{
if (term->blink_is_real) {
if (!term->tblink_pending)
term->next_tblink = schedule_timer(TBLINK_DELAY, term_timer, term);
term->tblink_pending = TRUE;
} else {
term->tblinker = 1; /* reset when not in use */
term->tblink_pending = FALSE;
}
}
/*
* Likewise with cursor blinks.
*/
static void term_schedule_cblink(Terminal *term)
{
if (term->blink_cur && term->has_focus) {
if (!term->cblink_pending)
term->next_cblink = schedule_timer(CBLINK_DELAY, term_timer, term);
term->cblink_pending = TRUE;
} else {
term->cblinker = 1; /* reset when not in use */
term->cblink_pending = FALSE;
}
}
/*
* Call to reset cursor blinking on new output.
*/
static void term_reset_cblink(Terminal *term)
{
seen_disp_event(term);
term->cblinker = 1;
term->cblink_pending = FALSE;
term_schedule_cblink(term);
}
/*
* Call to begin a visual bell.
*/
static void term_schedule_vbell(Terminal *term, int already_started,
long startpoint)
{
long ticks_already_gone;
if (already_started)
ticks_already_gone = GETTICKCOUNT() - startpoint;
else
ticks_already_gone = 0;
if (ticks_already_gone < VBELL_DELAY) {
term->in_vbell = TRUE;
term->vbell_end = schedule_timer(VBELL_DELAY - ticks_already_gone,
term_timer, term);
} else {
term->in_vbell = FALSE;
}
}
/*
* Set up power-on settings for the terminal.
* If 'clear' is false, don't actually clear the primary screen, and
* position the cursor below the last non-blank line (scrolling if
* necessary).
*/
static void power_on(Terminal *term, int clear)
{
term->alt_x = term->alt_y = 0;
term->savecurs.x = term->savecurs.y = 0;
term->alt_savecurs.x = term->alt_savecurs.y = 0;
term->alt_t = term->marg_t = 0;
if (term->rows != -1)
term->alt_b = term->marg_b = term->rows - 1;
else
term->alt_b = term->marg_b = 0;
if (term->cols != -1) {
int i;
for (i = 0; i < term->cols; i++)
term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
}
term->alt_om = term->dec_om = conf_get_int(term->conf, CONF_dec_om);
term->alt_ins = term->insert = FALSE;
term->alt_wnext = term->wrapnext =
term->save_wnext = term->alt_save_wnext = FALSE;
term->alt_wrap = term->wrap = conf_get_int(term->conf, CONF_wrap_mode);
term->alt_cset = term->cset = term->save_cset = term->alt_save_cset = 0;
term->alt_utf = term->utf = term->save_utf = term->alt_save_utf = 0;
term->utf_state = 0;
term->alt_sco_acs = term->sco_acs =
term->save_sco_acs = term->alt_save_sco_acs = 0;
term->cset_attr[0] = term->cset_attr[1] =
term->save_csattr = term->alt_save_csattr = CSET_ASCII;
term->rvideo = 0;
term->in_vbell = FALSE;
term->cursor_on = 1;
term->big_cursor = 0;
term->default_attr = term->save_attr =
term->alt_save_attr = term->curr_attr = ATTR_DEFAULT;
term->term_editing = term->term_echoing = FALSE;
term->app_cursor_keys = conf_get_int(term->conf, CONF_app_cursor);
term->app_keypad_keys = conf_get_int(term->conf, CONF_app_keypad);
term->use_bce = conf_get_int(term->conf, CONF_bce);
term->blink_is_real = conf_get_int(term->conf, CONF_blinktext);
term->erase_char = term->basic_erase_char;
term->alt_which = 0;
term_print_finish(term);
term->xterm_mouse = 0;
term->xterm_extended_mouse = 0;
term->urxvt_extended_mouse = 0;
set_raw_mouse_mode(term->frontend, FALSE);
term->bracketed_paste = FALSE;
{
int i;
for (i = 0; i < 256; i++)
term->wordness[i] = conf_get_int_int(term->conf, CONF_wordness, i);
}
if (term->screen) {
swap_screen(term, 1, FALSE, FALSE);
erase_lots(term, FALSE, TRUE, TRUE);
swap_screen(term, 0, FALSE, FALSE);
if (clear)
erase_lots(term, FALSE, TRUE, TRUE);
term->curs.y = find_last_nonempty_line(term, term->screen) + 1;
if (term->curs.y == term->rows) {
term->curs.y--;
scroll(term, 0, term->rows - 1, 1, TRUE);
}
} else {
term->curs.y = 0;
}
term->curs.x = 0;
term_schedule_tblink(term);
term_schedule_cblink(term);
}
/*
* Force a screen update.
*/
void term_update(Terminal *term)
{
Context ctx;
term->window_update_pending = FALSE;
ctx = get_ctx(term->frontend);
if (ctx) {
int need_sbar_update = term->seen_disp_event;
if (term->seen_disp_event && term->scroll_on_disp) {
term->disptop = 0; /* return to main screen */
term->seen_disp_event = 0;
need_sbar_update = TRUE;
}
if (need_sbar_update)
update_sbar(term);
do_paint(term, ctx, TRUE);
sys_cursor(term->frontend, term->curs.x, term->curs.y - term->disptop);
free_ctx(ctx);
}
}
/*
* Called from front end when a keypress occurs, to trigger
* anything magical that needs to happen in that situation.
*/
void term_seen_key_event(Terminal *term)
{
/*
* On any keypress, clear the bell overload mechanism
* completely, on the grounds that large numbers of
* beeps coming from deliberate key action are likely
* to be intended (e.g. beeps from filename completion
* blocking repeatedly).
*/
term->beep_overloaded = FALSE;
while (term->beephead) {
struct beeptime *tmp = term->beephead;
term->beephead = tmp->next;
sfree(tmp);
}
term->beeptail = NULL;
term->nbeeps = 0;
/*
* Reset the scrollback on keypress, if we're doing that.
*/
if (term->scroll_on_key) {
term->disptop = 0; /* return to main screen */
seen_disp_event(term);
}
}
/*
* Same as power_on(), but an external function.
*/
void term_pwron(Terminal *term, int clear)
{
power_on(term, clear);
if (term->ldisc) /* cause ldisc to notice changes */
ldisc_echoedit_update(term->ldisc);
term->disptop = 0;
deselect(term);
term_update(term);
}
static void set_erase_char(Terminal *term)
{
term->erase_char = term->basic_erase_char;
if (term->use_bce)
term->erase_char.attr = (term->curr_attr &
(ATTR_FGMASK | ATTR_BGMASK));
}
/*
* We copy a bunch of stuff out of the Conf structure into local
* fields in the Terminal structure, to avoid the repeated tree234
* lookups which would be involved in fetching them from the former
* every time.
*/
void term_copy_stuff_from_conf(Terminal *term)
{
term->ansi_colour = conf_get_int(term->conf, CONF_ansi_colour);
term->arabicshaping = conf_get_int(term->conf, CONF_arabicshaping);
term->beep = conf_get_int(term->conf, CONF_beep);
term->bellovl = conf_get_int(term->conf, CONF_bellovl);
term->bellovl_n = conf_get_int(term->conf, CONF_bellovl_n);
term->bellovl_s = conf_get_int(term->conf, CONF_bellovl_s);
term->bellovl_t = conf_get_int(term->conf, CONF_bellovl_t);
term->bidi = conf_get_int(term->conf, CONF_bidi);
term->bksp_is_delete = conf_get_int(term->conf, CONF_bksp_is_delete);
term->blink_cur = conf_get_int(term->conf, CONF_blink_cur);
term->blinktext = conf_get_int(term->conf, CONF_blinktext);
term->cjk_ambig_wide = conf_get_int(term->conf, CONF_cjk_ambig_wide);
term->conf_height = conf_get_int(term->conf, CONF_height);
term->conf_width = conf_get_int(term->conf, CONF_width);
term->crhaslf = conf_get_int(term->conf, CONF_crhaslf);
term->erase_to_scrollback = conf_get_int(term->conf, CONF_erase_to_scrollback);
term->funky_type = conf_get_int(term->conf, CONF_funky_type);
term->lfhascr = conf_get_int(term->conf, CONF_lfhascr);
term->logflush = conf_get_int(term->conf, CONF_logflush);
term->logtype = conf_get_int(term->conf, CONF_logtype);
term->mouse_override = conf_get_int(term->conf, CONF_mouse_override);
term->nethack_keypad = conf_get_int(term->conf, CONF_nethack_keypad);
term->no_alt_screen = conf_get_int(term->conf, CONF_no_alt_screen);
term->no_applic_c = conf_get_int(term->conf, CONF_no_applic_c);
term->no_applic_k = conf_get_int(term->conf, CONF_no_applic_k);
term->no_dbackspace = conf_get_int(term->conf, CONF_no_dbackspace);
term->no_mouse_rep = conf_get_int(term->conf, CONF_no_mouse_rep);
term->no_remote_charset = conf_get_int(term->conf, CONF_no_remote_charset);
term->no_remote_resize = conf_get_int(term->conf, CONF_no_remote_resize);
term->no_remote_wintitle = conf_get_int(term->conf, CONF_no_remote_wintitle);
term->no_remote_clearscroll = conf_get_int(term->conf, CONF_no_remote_clearscroll);
term->rawcnp = conf_get_int(term->conf, CONF_rawcnp);
term->rect_select = conf_get_int(term->conf, CONF_rect_select);
term->remote_qtitle_action = conf_get_int(term->conf, CONF_remote_qtitle_action);
term->rxvt_homeend = conf_get_int(term->conf, CONF_rxvt_homeend);
term->scroll_on_disp = conf_get_int(term->conf, CONF_scroll_on_disp);
term->scroll_on_key = conf_get_int(term->conf, CONF_scroll_on_key);
term->xterm_256_colour = conf_get_int(term->conf, CONF_xterm_256_colour);
/*
* Parse the control-character escapes in the configured
* answerback string.
*/
{
char *answerback = conf_get_str(term->conf, CONF_answerback);
int maxlen = strlen(answerback);
term->answerback = snewn(maxlen, char);
term->answerbacklen = 0;
while (*answerback) {
char *n;
char c = ctrlparse(answerback, &n);
if (n) {
term->answerback[term->answerbacklen++] = c;
answerback = n;
} else {
term->answerback[term->answerbacklen++] = *answerback++;
}
}
}
}
/*
* When the user reconfigures us, we need to check the forbidden-
* alternate-screen config option, disable raw mouse mode if the
* user has disabled mouse reporting, and abandon a print job if
* the user has disabled printing.
*/
void term_reconfig(Terminal *term, Conf *conf)
{
/*
* Before adopting the new config, check all those terminal
* settings which control power-on defaults; and if they've
* changed, we will modify the current state as well as the
* default one. The full list is: Auto wrap mode, DEC Origin
* Mode, BCE, blinking text, character classes.
*/
int reset_wrap, reset_decom, reset_bce, reset_tblink, reset_charclass;
int i;
reset_wrap = (conf_get_int(term->conf, CONF_wrap_mode) !=
conf_get_int(conf, CONF_wrap_mode));
reset_decom = (conf_get_int(term->conf, CONF_dec_om) !=
conf_get_int(conf, CONF_dec_om));
reset_bce = (conf_get_int(term->conf, CONF_bce) !=
conf_get_int(conf, CONF_bce));
reset_tblink = (conf_get_int(term->conf, CONF_blinktext) !=
conf_get_int(conf, CONF_blinktext));
reset_charclass = 0;
for (i = 0; i < 256; i++)
if (conf_get_int_int(term->conf, CONF_wordness, i) !=
conf_get_int_int(conf, CONF_wordness, i))
reset_charclass = 1;
/*
* If the bidi or shaping settings have changed, flush the bidi
* cache completely.
*/
if (conf_get_int(term->conf, CONF_arabicshaping) !=
conf_get_int(conf, CONF_arabicshaping) ||
conf_get_int(term->conf, CONF_bidi) !=
conf_get_int(conf, CONF_bidi)) {
for (i = 0; i < term->bidi_cache_size; i++) {
sfree(term->pre_bidi_cache[i].chars);
sfree(term->post_bidi_cache[i].chars);
term->pre_bidi_cache[i].width = -1;
term->pre_bidi_cache[i].chars = NULL;
term->post_bidi_cache[i].width = -1;
term->post_bidi_cache[i].chars = NULL;
}
}
conf_free(term->conf);
term->conf = conf_copy(conf);
if (reset_wrap)
term->alt_wrap = term->wrap = conf_get_int(term->conf, CONF_wrap_mode);
if (reset_decom)
term->alt_om = term->dec_om = conf_get_int(term->conf, CONF_dec_om);
if (reset_bce) {
term->use_bce = conf_get_int(term->conf, CONF_bce);
set_erase_char(term);
}
if (reset_tblink) {
term->blink_is_real = conf_get_int(term->conf, CONF_blinktext);
}
if (reset_charclass)
for (i = 0; i < 256; i++)
term->wordness[i] = conf_get_int_int(term->conf, CONF_wordness, i);
if (conf_get_int(term->conf, CONF_no_alt_screen))
swap_screen(term, 0, FALSE, FALSE);
if (conf_get_int(term->conf, CONF_no_mouse_rep)) {
term->xterm_mouse = 0;
set_raw_mouse_mode(term->frontend, 0);
}
if (conf_get_int(term->conf, CONF_no_remote_charset)) {
term->cset_attr[0] = term->cset_attr[1] = CSET_ASCII;
term->sco_acs = term->alt_sco_acs = 0;
term->utf = 0;
}
if (!conf_get_str(term->conf, CONF_printer)) {
term_print_finish(term);
}
term_schedule_tblink(term);
term_schedule_cblink(term);
term_copy_stuff_from_conf(term);
}
/*
* Clear the scrollback.
*/
void term_clrsb(Terminal *term)
{
unsigned char *line;
int i;
/*
* Scroll forward to the current screen, if we were back in the
* scrollback somewhere until now.
*/
term->disptop = 0;
/*
* Clear the actual scrollback.
*/
while ((line = delpos234(term->scrollback, 0)) != NULL) {
sfree(line); /* this is compressed data, not a termline */
}
/*
* When clearing the scrollback, we also truncate any termlines on
* the current screen which have remembered data from a previous
* larger window size. Rationale: clearing the scrollback is
* sometimes done to protect privacy, so the user intention is
* specifically that we should not retain evidence of what
* previously happened in the terminal, and that ought to include
* evidence to the right as well as evidence above.
*/
for (i = 0; i < term->rows; i++)
check_line_size(term, scrlineptr(i));
/*
* There are now no lines of real scrollback which can be pulled
* back into the screen by a resize, and no lines of the alternate
* screen which should be displayed as if part of the scrollback.
*/
term->tempsblines = 0;
term->alt_sblines = 0;
/*
* Update the scrollbar to reflect the new state of the world.
*/
update_sbar(term);
}
/*
* Initialise the terminal.
*/
Terminal *term_init(Conf *myconf, struct unicode_data *ucsdata,
void *frontend)
{
Terminal *term;
/*
* Allocate a new Terminal structure and initialise the fields
* that need it.
*/
term = snew(Terminal);
term->frontend = frontend;
term->ucsdata = ucsdata;
term->conf = conf_copy(myconf);
term->logctx = NULL;
term->compatibility_level = TM_PUTTY;
strcpy(term->id_string, "\033[?6c");
term->cblink_pending = term->tblink_pending = FALSE;
term->paste_buffer = NULL;
term->paste_len = 0;
bufchain_init(&term->inbuf);
bufchain_init(&term->printer_buf);
term->printing = term->only_printing = FALSE;
term->print_job = NULL;
term->vt52_mode = FALSE;
term->cr_lf_return = FALSE;
term->seen_disp_event = FALSE;
term->mouse_is_down = FALSE;
term->reset_132 = FALSE;
term->cblinker = term->tblinker = 0;
term->has_focus = 1;
term->repeat_off = FALSE;
term->termstate = TOPLEVEL;
term->selstate = NO_SELECTION;
term->curstype = 0;
term_copy_stuff_from_conf(term);
term->screen = term->alt_screen = term->scrollback = NULL;
term->tempsblines = 0;
term->alt_sblines = 0;
term->disptop = 0;
term->disptext = NULL;
term->dispcursx = term->dispcursy = -1;
term->tabs = NULL;
deselect(term);
term->rows = term->cols = -1;
power_on(term, TRUE);
term->beephead = term->beeptail = NULL;
#ifdef OPTIMISE_SCROLL
term->scrollhead = term->scrolltail = NULL;
#endif /* OPTIMISE_SCROLL */
term->nbeeps = 0;
term->lastbeep = FALSE;
term->beep_overloaded = FALSE;
term->attr_mask = 0xffffffff;
term->resize_fn = NULL;
term->resize_ctx = NULL;
term->in_term_out = FALSE;
term->ltemp = NULL;
term->ltemp_size = 0;
term->wcFrom = NULL;
term->wcTo = NULL;
term->wcFromTo_size = 0;
term->window_update_pending = FALSE;
term->bidi_cache_size = 0;
term->pre_bidi_cache = term->post_bidi_cache = NULL;
/* FULL-TERMCHAR */
term->basic_erase_char.chr = CSET_ASCII | ' ';
term->basic_erase_char.attr = ATTR_DEFAULT;
term->basic_erase_char.cc_next = 0;
term->erase_char = term->basic_erase_char;
return term;
}
void term_free(Terminal *term)
{
termline *line;
struct beeptime *beep;
int i;
while ((line = delpos234(term->scrollback, 0)) != NULL)
sfree(line); /* compressed data, not a termline */
freetree234(term->scrollback);
while ((line = delpos234(term->screen, 0)) != NULL)
freeline(line);
freetree234(term->screen);
while ((line = delpos234(term->alt_screen, 0)) != NULL)
freeline(line);
freetree234(term->alt_screen);
if (term->disptext) {
for (i = 0; i < term->rows; i++)
freeline(term->disptext[i]);
}
sfree(term->disptext);
while (term->beephead) {
beep = term->beephead;
term->beephead = beep->next;
sfree(beep);
}
bufchain_clear(&term->inbuf);
if(term->print_job)
printer_finish_job(term->print_job);
bufchain_clear(&term->printer_buf);
sfree(term->paste_buffer);
sfree(term->ltemp);
sfree(term->wcFrom);
sfree(term->wcTo);
for (i = 0; i < term->bidi_cache_size; i++) {
sfree(term->pre_bidi_cache[i].chars);
sfree(term->post_bidi_cache[i].chars);
sfree(term->post_bidi_cache[i].forward);
sfree(term->post_bidi_cache[i].backward);
}
sfree(term->pre_bidi_cache);
sfree(term->post_bidi_cache);
sfree(term->tabs);
expire_timer_context(term);
conf_free(term->conf);
sfree(term);
}
/*
* Set up the terminal for a given size.
*/
void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
{
tree234 *newalt;
termline **newdisp, *line;
int i, j, oldrows = term->rows;
int sblen;
int save_alt_which = term->alt_which;
if (newrows == term->rows && newcols == term->cols &&
newsavelines == term->savelines)
return; /* nothing to do */
/* Behave sensibly if we're given zero (or negative) rows/cols */
if (newrows < 1) newrows = 1;
if (newcols < 1) newcols = 1;
deselect(term);
swap_screen(term, 0, FALSE, FALSE);
term->alt_t = term->marg_t = 0;
term->alt_b = term->marg_b = newrows - 1;
if (term->rows == -1) {
term->scrollback = newtree234(NULL);
term->screen = newtree234(NULL);
term->tempsblines = 0;
term->rows = 0;
}
/*
* Resize the screen and scrollback. We only need to shift
* lines around within our data structures, because lineptr()
* will take care of resizing each individual line if
* necessary. So:
*
* - If the new screen is longer, we shunt lines in from temporary
* scrollback if possible, otherwise we add new blank lines at
* the bottom.
*
* - If the new screen is shorter, we remove any blank lines at
* the bottom if possible, otherwise shunt lines above the cursor
* to scrollback if possible, otherwise delete lines below the
* cursor.
*
* - Then, if the new scrollback length is less than the
* amount of scrollback we actually have, we must throw some
* away.
*/
sblen = count234(term->scrollback);
/* Do this loop to expand the screen if newrows > rows */
assert(term->rows == count234(term->screen));
while (term->rows < newrows) {
if (term->tempsblines > 0) {
unsigned char *cline;
/* Insert a line from the scrollback at the top of the screen. */
assert(sblen >= term->tempsblines);
cline = delpos234(term->scrollback, --sblen);
line = decompressline(cline, NULL);
sfree(cline);
line->temporary = FALSE; /* reconstituted line is now real */
term->tempsblines -= 1;
addpos234(term->screen, line, 0);
term->curs.y += 1;
term->savecurs.y += 1;
term->alt_y += 1;
term->alt_savecurs.y += 1;
} else {
/* Add a new blank line at the bottom of the screen. */
line = newline(term, newcols, FALSE);
addpos234(term->screen, line, count234(term->screen));
}
term->rows += 1;
}
/* Do this loop to shrink the screen if newrows < rows */
while (term->rows > newrows) {
if (term->curs.y < term->rows - 1) {
/* delete bottom row, unless it contains the cursor */
line = delpos234(term->screen, term->rows - 1);
freeline(line);
} else {
/* push top row to scrollback */
line = delpos234(term->screen, 0);
addpos234(term->scrollback, compressline(line), sblen++);
freeline(line);
term->tempsblines += 1;
term->curs.y -= 1;
term->savecurs.y -= 1;
term->alt_y -= 1;
term->alt_savecurs.y -= 1;
}
term->rows -= 1;
}
assert(term->rows == newrows);
assert(count234(term->screen) == newrows);
/* Delete any excess lines from the scrollback. */
while (sblen > newsavelines) {
line = delpos234(term->scrollback, 0);
sfree(line);
sblen--;
}
if (sblen < term->tempsblines)
term->tempsblines = sblen;
assert(count234(term->scrollback) <= newsavelines);
assert(count234(term->scrollback) >= term->tempsblines);
term->disptop = 0;
/* Make a new displayed text buffer. */
newdisp = snewn(newrows, termline *);
for (i = 0; i < newrows; i++) {
newdisp[i] = newline(term, newcols, FALSE);
for (j = 0; j < newcols; j++)
newdisp[i]->chars[j].attr = ATTR_INVALID;
}
if (term->disptext) {
for (i = 0; i < oldrows; i++)
freeline(term->disptext[i]);
}
sfree(term->disptext);
term->disptext = newdisp;
term->dispcursx = term->dispcursy = -1;
/* Make a new alternate screen. */
newalt = newtree234(NULL);
for (i = 0; i < newrows; i++) {
line = newline(term, newcols, TRUE);
addpos234(newalt, line, i);
}
if (term->alt_screen) {
while (NULL != (line = delpos234(term->alt_screen, 0)))
freeline(line);
freetree234(term->alt_screen);
}
term->alt_screen = newalt;
term->alt_sblines = 0;
term->tabs = sresize(term->tabs, newcols, unsigned char);
{
int i;
for (i = (term->cols > 0 ? term->cols : 0); i < newcols; i++)
term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
}
/* Check that the cursor positions are still valid. */
if (term->savecurs.y < 0)
term->savecurs.y = 0;
if (term->savecurs.y >= newrows)
term->savecurs.y = newrows - 1;
if (term->savecurs.x >= newcols)
term->savecurs.x = newcols - 1;
if (term->alt_savecurs.y < 0)
term->alt_savecurs.y = 0;
if (term->alt_savecurs.y >= newrows)
term->alt_savecurs.y = newrows - 1;
if (term->alt_savecurs.x >= newcols)
term->alt_savecurs.x = newcols - 1;
if (term->curs.y < 0)
term->curs.y = 0;
if (term->curs.y >= newrows)
term->curs.y = newrows - 1;
if (term->curs.x >= newcols)
term->curs.x = newcols - 1;
if (term->alt_y < 0)
term->alt_y = 0;
if (term->alt_y >= newrows)
term->alt_y = newrows - 1;
if (term->alt_x >= newcols)
term->alt_x = newcols - 1;
term->alt_x = term->alt_y = 0;
term->wrapnext = term->alt_wnext = FALSE;
term->rows = newrows;
term->cols = newcols;
term->savelines = newsavelines;
swap_screen(term, save_alt_which, FALSE, FALSE);
update_sbar(term);
term_update(term);
if (term->resize_fn)
term->resize_fn(term->resize_ctx, term->cols, term->rows);
}
/*
* Hand a function and context pointer to the terminal which it can
* use to notify a back end of resizes.
*/
void term_provide_resize_fn(Terminal *term,
void (*resize_fn)(void *, int, int),
void *resize_ctx)
{
term->resize_fn = resize_fn;
term->resize_ctx = resize_ctx;
if (resize_fn && term->cols > 0 && term->rows > 0)
resize_fn(resize_ctx, term->cols, term->rows);
}
/* Find the bottom line on the screen that has any content.
* If only the top line has content, returns 0.
* If no lines have content, return -1.
*/
static int find_last_nonempty_line(Terminal * term, tree234 * screen)
{
int i;
for (i = count234(screen) - 1; i >= 0; i--) {
termline *line = index234(screen, i);
int j;
for (j = 0; j < line->cols; j++)
if (!termchars_equal(&line->chars[j], &term->erase_char))
break;
if (j != line->cols) break;
}
return i;
}
/*
* Swap screens. If `reset' is TRUE and we have been asked to
* switch to the alternate screen, we must bring most of its
* configuration from the main screen and erase the contents of the
* alternate screen completely. (This is even true if we're already
* on it! Blame xterm.)
*/
static void swap_screen(Terminal *term, int which, int reset, int keep_cur_pos)
{
int t;
pos tp;
tree234 *ttr;
if (!which)
reset = FALSE; /* do no weird resetting if which==0 */
if (which != term->alt_which) {
term->alt_which = which;
ttr = term->alt_screen;
term->alt_screen = term->screen;
term->screen = ttr;
term->alt_sblines = find_last_nonempty_line(term, term->alt_screen) + 1;
t = term->curs.x;
if (!reset && !keep_cur_pos)
term->curs.x = term->alt_x;
term->alt_x = t;
t = term->curs.y;
if (!reset && !keep_cur_pos)
term->curs.y = term->alt_y;
term->alt_y = t;
t = term->marg_t;
if (!reset) term->marg_t = term->alt_t;
term->alt_t = t;
t = term->marg_b;
if (!reset) term->marg_b = term->alt_b;
term->alt_b = t;
t = term->dec_om;
if (!reset) term->dec_om = term->alt_om;
term->alt_om = t;
t = term->wrap;
if (!reset) term->wrap = term->alt_wrap;
term->alt_wrap = t;
t = term->wrapnext;
if (!reset) term->wrapnext = term->alt_wnext;
term->alt_wnext = t;
t = term->insert;
if (!reset) term->insert = term->alt_ins;
term->alt_ins = t;
t = term->cset;
if (!reset) term->cset = term->alt_cset;
term->alt_cset = t;
t = term->utf;
if (!reset) term->utf = term->alt_utf;
term->alt_utf = t;
t = term->sco_acs;
if (!reset) term->sco_acs = term->alt_sco_acs;
term->alt_sco_acs = t;
tp = term->savecurs;
if (!reset && !keep_cur_pos)
term->savecurs = term->alt_savecurs;
term->alt_savecurs = tp;
t = term->save_cset;
if (!reset && !keep_cur_pos)
term->save_cset = term->alt_save_cset;
term->alt_save_cset = t;
t = term->save_csattr;
if (!reset && !keep_cur_pos)
term->save_csattr = term->alt_save_csattr;
term->alt_save_csattr = t;
t = term->save_attr;
if (!reset && !keep_cur_pos)
term->save_attr = term->alt_save_attr;
term->alt_save_attr = t;
t = term->save_utf;
if (!reset && !keep_cur_pos)
term->save_utf = term->alt_save_utf;
term->alt_save_utf = t;
t = term->save_wnext;
if (!reset && !keep_cur_pos)
term->save_wnext = term->alt_save_wnext;
term->alt_save_wnext = t;
t = term->save_sco_acs;
if (!reset && !keep_cur_pos)
term->save_sco_acs = term->alt_save_sco_acs;
term->alt_save_sco_acs = t;
}
if (reset && term->screen) {
/*
* Yes, this _is_ supposed to honour background-colour-erase.
*/
erase_lots(term, FALSE, TRUE, TRUE);
}
}
/*
* Update the scroll bar.
*/
static void update_sbar(Terminal *term)
{
int nscroll = sblines(term);
set_sbar(term->frontend, nscroll + term->rows,
nscroll + term->disptop, term->rows);
}
/*
* Check whether the region bounded by the two pointers intersects
* the scroll region, and de-select the on-screen selection if so.
*/
static void check_selection(Terminal *term, pos from, pos to)
{
if (poslt(from, term->selend) && poslt(term->selstart, to))
deselect(term);
}
/*
* Scroll the screen. (`lines' is +ve for scrolling forward, -ve
* for backward.) `sb' is TRUE if the scrolling is permitted to
* affect the scrollback buffer.
*/
static void scroll(Terminal *term, int topline, int botline, int lines, int sb)
{
termline *line;
int i, seltop, scrollwinsize;
#ifdef OPTIMISE_SCROLL
int olddisptop, shift;
#endif /* OPTIMISE_SCROLL */
if (topline != 0 || term->alt_which != 0)
sb = FALSE;
#ifdef OPTIMISE_SCROLL
olddisptop = term->disptop;
shift = lines;
#endif /* OPTIMISE_SCROLL */
scrollwinsize = botline - topline + 1;
if (lines < 0) {
lines = -lines;
if (lines > scrollwinsize)
lines = scrollwinsize;
while (lines-- > 0) {
line = delpos234(term->screen, botline);
resizeline(term, line, term->cols);
for (i = 0; i < term->cols; i++)
copy_termchar(line, i, &term->erase_char);
line->lattr = LATTR_NORM;
addpos234(term->screen, line, topline);
if (term->selstart.y >= topline && term->selstart.y <= botline) {
term->selstart.y++;
if (term->selstart.y > botline) {
term->selstart.y = botline + 1;
term->selstart.x = 0;
}
}
if (term->selend.y >= topline && term->selend.y <= botline) {
term->selend.y++;
if (term->selend.y > botline) {
term->selend.y = botline + 1;
term->selend.x = 0;
}
}
}
} else {
if (lines > scrollwinsize)
lines = scrollwinsize;
while (lines-- > 0) {
line = delpos234(term->screen, topline);
#ifdef TERM_CC_DIAGS
cc_check(line);
#endif
if (sb && term->savelines > 0) {
int sblen = count234(term->scrollback);
/*
* We must add this line to the scrollback. We'll
* remove a line from the top of the scrollback if
* the scrollback is full.
*/
if (sblen == term->savelines) {
unsigned char *cline;
sblen--;
cline = delpos234(term->scrollback, 0);
sfree(cline);
} else
term->tempsblines += 1;
addpos234(term->scrollback, compressline(line), sblen);
/* now `line' itself can be reused as the bottom line */
/*
* If the user is currently looking at part of the
* scrollback, and they haven't enabled any options
* that are going to reset the scrollback as a
* result of this movement, then the chances are
* they'd like to keep looking at the same line. So
* we move their viewpoint at the same rate as the
* scroll, at least until their viewpoint hits the
* top end of the scrollback buffer, at which point
* we don't have the choice any more.
*
* Thanks to Jan Holmen Holsten for the idea and
* initial implementation.
*/
if (term->disptop > -term->savelines && term->disptop < 0)
term->disptop--;
}
resizeline(term, line, term->cols);
for (i = 0; i < term->cols; i++)
copy_termchar(line, i, &term->erase_char);
line->lattr = LATTR_NORM;
addpos234(term->screen, line, botline);
/*
* If the selection endpoints move into the scrollback,
* we keep them moving until they hit the top. However,
* of course, if the line _hasn't_ moved into the
* scrollback then we don't do this, and cut them off
* at the top of the scroll region.
*
* This applies to selstart and selend (for an existing
* selection), and also selanchor (for one being
* selected as we speak).
*/
seltop = sb ? -term->savelines : topline;
if (term->selstate != NO_SELECTION) {
if (term->selstart.y >= seltop &&
term->selstart.y <= botline) {
term->selstart.y--;
if (term->selstart.y < seltop) {
term->selstart.y = seltop;
term->selstart.x = 0;
}
}
if (term->selend.y >= seltop && term->selend.y <= botline) {
term->selend.y--;
if (term->selend.y < seltop) {
term->selend.y = seltop;
term->selend.x = 0;
}
}
if (term->selanchor.y >= seltop &&
term->selanchor.y <= botline) {
term->selanchor.y--;
if (term->selanchor.y < seltop) {
term->selanchor.y = seltop;
term->selanchor.x = 0;
}
}
}
}
}
#ifdef OPTIMISE_SCROLL
shift += term->disptop - olddisptop;
if (shift < term->rows && shift > -term->rows && shift != 0)
scroll_display(term, topline, botline, shift);
#endif /* OPTIMISE_SCROLL */
}
#ifdef OPTIMISE_SCROLL
/*
* Add a scroll of a region on the screen into the pending scroll list.
* `lines' is +ve for scrolling forward, -ve for backward.
*
* If the scroll is on the same area as the last scroll in the list,
* merge them.
*/
static void save_scroll(Terminal *term, int topline, int botline, int lines)
{
struct scrollregion *newscroll;
if (term->scrolltail &&
term->scrolltail->topline == topline &&
term->scrolltail->botline == botline) {
term->scrolltail->lines += lines;
} else {
newscroll = snew(struct scrollregion);
newscroll->topline = topline;
newscroll->botline = botline;
newscroll->lines = lines;
newscroll->next = NULL;
if (!term->scrollhead)
term->scrollhead = newscroll;
else
term->scrolltail->next = newscroll;
term->scrolltail = newscroll;
}
}
/*
* Scroll the physical display, and our conception of it in disptext.
*/
static void scroll_display(Terminal *term, int topline, int botline, int lines)
{
int distance, nlines, i, j;
distance = lines > 0 ? lines : -lines;
nlines = botline - topline + 1 - distance;
if (lines > 0) {
for (i = 0; i < nlines; i++)
for (j = 0; j < term->cols; j++)
copy_termchar(term->disptext[i], j,
term->disptext[i+distance]->chars+j);
if (term->dispcursy >= 0 &&
term->dispcursy >= topline + distance &&
term->dispcursy < topline + distance + nlines)
term->dispcursy -= distance;
for (i = 0; i < distance; i++)
for (j = 0; j < term->cols; j++)
term->disptext[nlines+i]->chars[j].attr |= ATTR_INVALID;
} else {
for (i = nlines; i-- ;)
for (j = 0; j < term->cols; j++)
copy_termchar(term->disptext[i+distance], j,
term->disptext[i]->chars+j);
if (term->dispcursy >= 0 &&
term->dispcursy >= topline &&
term->dispcursy < topline + nlines)
term->dispcursy += distance;
for (i = 0; i < distance; i++)
for (j = 0; j < term->cols; j++)
term->disptext[i]->chars[j].attr |= ATTR_INVALID;
}
save_scroll(term, topline, botline, lines);
}
#endif /* OPTIMISE_SCROLL */
/*
* Move the cursor to a given position, clipping at boundaries. We
* may or may not want to clip at the scroll margin: marg_clip is 0
* not to, 1 to disallow _passing_ the margins, and 2 to disallow
* even _being_ outside the margins.
*/
static void move(Terminal *term, int x, int y, int marg_clip)
{
if (x < 0)
x = 0;
if (x >= term->cols)
x = term->cols - 1;
if (marg_clip) {
if ((term->curs.y >= term->marg_t || marg_clip == 2) &&
y < term->marg_t)
y = term->marg_t;
if ((term->curs.y <= term->marg_b || marg_clip == 2) &&
y > term->marg_b)
y = term->marg_b;
}
if (y < 0)
y = 0;
if (y >= term->rows)
y = term->rows - 1;
term->curs.x = x;
term->curs.y = y;
term->wrapnext = FALSE;
}
/*
* Save or restore the cursor and SGR mode.
*/
static void save_cursor(Terminal *term, int save)
{
if (save) {
term->savecurs = term->curs;
term->save_attr = term->curr_attr;
term->save_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->cset = term->save_cset;
term->utf = term->save_utf;
term->wrapnext = term->save_wnext;
/*
* wrapnext might reset to False if the x position is no
* longer at the rightmost edge.
*/
if (term->wrapnext && term->curs.x < term->cols-1)
term->wrapnext = FALSE;
term->cset_attr[term->cset] = term->save_csattr;
term->sco_acs = term->save_sco_acs;
set_erase_char(term);
}
}
/*
* This function is called before doing _anything_ which affects
* only part of a line of text. It is used to mark the boundary
* between two character positions, and it indicates that some sort
* of effect is going to happen on only one side of that boundary.
*
* The effect of this function is to check whether a CJK
* double-width character is straddling the boundary, and to remove
* it and replace it with two spaces if so. (Of course, one or
* other of those spaces is then likely to be replaced with
* something else again, as a result of whatever happens next.)
*
* Also, if the boundary is at the right-hand _edge_ of the screen,
* it implies something deliberate is being done to the rightmost
* column position; hence we must clear LATTR_WRAPPED2.
*
* The input to the function is the coordinates of the _second_
* character of the pair.
*/
static void check_boundary(Terminal *term, int x, int y)
{
termline *ldata;
/* Validate input coordinates, just in case. */
if (x <= 0 || x > term->cols)
return;
ldata = scrlineptr(y);
check_line_size(term, ldata);
if (x == term->cols) {
ldata->lattr &= ~LATTR_WRAPPED2;
} else {
if (ldata->chars[x].chr == UCSWIDE) {
clear_cc(ldata, x-1);
clear_cc(ldata, x);
ldata->chars[x-1].chr = ' ' | CSET_ASCII;
ldata->chars[x] = ldata->chars[x-1];
}
}
}
/*
* Erase a large portion of the screen: the whole screen, or the
* whole line, or parts thereof.
*/
static void erase_lots(Terminal *term,
int line_only, int from_begin, int to_end)
{
pos start, end;
int erase_lattr;
int erasing_lines_from_top = 0;
if (line_only) {
start.y = term->curs.y;
start.x = 0;
end.y = term->curs.y + 1;
end.x = 0;
erase_lattr = FALSE;
} else {
start.y = 0;
start.x = 0;
end.y = term->rows;
end.x = 0;
erase_lattr = TRUE;
}
if (!from_begin) {
start = term->curs;
}
if (!to_end) {
end = term->curs;
incpos(end);
}
if (!from_begin || !to_end)
check_boundary(term, term->curs.x, term->curs.y);
check_selection(term, start, end);
/* Clear screen also forces a full window redraw, just in case. */
if (start.y == 0 && start.x == 0 && end.y == term->rows)
term_invalidate(term);
/* Lines scrolled away shouldn't be brought back on if the terminal
* resizes. */
if (start.y == 0 && start.x == 0 && end.x == 0 && erase_lattr)
erasing_lines_from_top = 1;
if (term->erase_to_scrollback && erasing_lines_from_top) {
/* If it's a whole number of lines, starting at the top, and
* we're fully erasing them, erase by scrolling and keep the
* lines in the scrollback. */
int scrolllines = end.y;
if (end.y == term->rows) {
/* Shrink until we find a non-empty row.*/
scrolllines = find_last_nonempty_line(term, term->screen) + 1;
}
if (scrolllines > 0)
scroll(term, 0, scrolllines - 1, scrolllines, TRUE);
} else {
termline *ldata = scrlineptr(start.y);
while (poslt(start, end)) {
check_line_size(term, ldata);
if (start.x == term->cols) {
if (!erase_lattr)
ldata->lattr &= ~(LATTR_WRAPPED | LATTR_WRAPPED2);
else
ldata->lattr = LATTR_NORM;
} else {
copy_termchar(ldata, start.x, &term->erase_char);
}
if (incpos(start) && start.y < term->rows) {
ldata = scrlineptr(start.y);
}
}
}
/* After an erase of lines from the top of the screen, we shouldn't
* bring the lines back again if the terminal enlarges (since the user or
* application has explicitly thrown them away). */
if (erasing_lines_from_top && !(term->alt_which))
term->tempsblines = 0;
}
/*
* Insert or delete characters within the current line. n is +ve if
* insertion is desired, and -ve for deletion.
*/
static void insch(Terminal *term, int n)
{
int dir = (n < 0 ? -1 : +1);
int m, j;
pos eol;
termline *ldata;
n = (n < 0 ? -n : n);
if (n > term->cols - term->curs.x)
n = term->cols - term->curs.x;
m = term->cols - term->curs.x - n;
/*
* We must de-highlight the selection if it overlaps any part of
* the region affected by this operation, i.e. the region from the
* current cursor position to end-of-line, _unless_ the entirety
* of the selection is going to be moved to the left or right by
* this operation but otherwise unchanged, in which case we can
* simply move the highlight with the text.
*/
eol.y = term->curs.y;
eol.x = term->cols;
if (poslt(term->curs, term->selend) && poslt(term->selstart, eol)) {
pos okstart = term->curs;
pos okend = eol;
if (dir > 0) {
/* Insertion: n characters at EOL will be splatted. */
okend.x -= n;
} else {
/* Deletion: n characters at cursor position will be splatted. */
okstart.x += n;
}
if (posle(okstart, term->selstart) && posle(term->selend, okend)) {
/* Selection is contained entirely in the interval
* [okstart,okend), so we need only adjust the selection
* bounds. */
term->selstart.x += dir * n;
term->selend.x += dir * n;
assert(term->selstart.x >= term->curs.x);
assert(term->selstart.x < term->cols);
assert(term->selend.x > term->curs.x);
assert(term->selend.x <= term->cols);
} else {
/* Selection is not wholly contained in that interval, so
* we must unhighlight it. */
deselect(term);
}
}
check_boundary(term, term->curs.x, term->curs.y);
if (dir < 0)
check_boundary(term, term->curs.x + n, term->curs.y);
ldata = scrlineptr(term->curs.y);
if (dir < 0) {
for (j = 0; j < m; j++)
move_termchar(ldata,
ldata->chars + term->curs.x + j,
ldata->chars + term->curs.x + j + n);
while (n--)
copy_termchar(ldata, term->curs.x + m++, &term->erase_char);
} else {
for (j = m; j-- ;)
move_termchar(ldata,
ldata->chars + term->curs.x + j + n,
ldata->chars + term->curs.x + j);
while (n--)
copy_termchar(ldata, term->curs.x + n, &term->erase_char);
}
}
/*
* Toggle terminal mode `mode' to state `state'. (`query' indicates
* whether the mode is a DEC private one or a normal one.)
*/
static void toggle_mode(Terminal *term, int mode, int query, int state)
{
if (query)
switch (mode) {
case 1: /* DECCKM: application cursor keys */
term->app_cursor_keys = state;
break;
case 2: /* DECANM: VT52 mode */
term->vt52_mode = !state;
if (term->vt52_mode) {
term->blink_is_real = FALSE;
term->vt52_bold = FALSE;
} else {
term->blink_is_real = term->blinktext;
}
term_schedule_tblink(term);
break;
case 3: /* DECCOLM: 80/132 columns */
deselect(term);
if (!term->no_remote_resize)
request_resize(term->frontend, state ? 132 : 80, term->rows);
term->reset_132 = state;
term->alt_t = term->marg_t = 0;
term->alt_b = term->marg_b = term->rows - 1;
move(term, 0, 0, 0);
erase_lots(term, FALSE, TRUE, TRUE);
break;
case 5: /* DECSCNM: reverse video */
/*
* Toggle reverse video. If we receive an OFF within the
* visual bell timeout period after an ON, we trigger an
* effective visual bell, so that ESC[?5hESC[?5l will
* always be an actually _visible_ visual bell.
*/
if (term->rvideo && !state) {
/* This is an OFF, so set up a vbell */
term_schedule_vbell(term, TRUE, term->rvbell_startpoint);
} else if (!term->rvideo && state) {
/* This is an ON, so we notice the time and save it. */
term->rvbell_startpoint = GETTICKCOUNT();
}
term->rvideo = state;
seen_disp_event(term);
break;
case 6: /* DECOM: DEC origin mode */
term->dec_om = state;
break;
case 7: /* DECAWM: auto wrap */
term->wrap = state;
break;
case 8: /* DECARM: auto key repeat */
term->repeat_off = !state;
break;
case 10: /* DECEDM: set local edit mode */
term->term_editing = state;
if (term->ldisc) /* cause ldisc to notice changes */
ldisc_echoedit_update(term->ldisc);
break;
case 25: /* DECTCEM: enable/disable cursor */
compatibility2(OTHER, VT220);
term->cursor_on = state;
seen_disp_event(term);
break;
case 47: /* alternate screen */
compatibility(OTHER);
deselect(term);
swap_screen(term, term->no_alt_screen ? 0 : state, FALSE, FALSE);
if (term->scroll_on_disp)
term->disptop = 0;
break;
case 1000: /* xterm mouse 1 (normal) */
term->xterm_mouse = state ? 1 : 0;
set_raw_mouse_mode(term->frontend, state);
break;
case 1002: /* xterm mouse 2 (inc. button drags) */
term->xterm_mouse = state ? 2 : 0;
set_raw_mouse_mode(term->frontend, state);
break;
case 1006: /* xterm extended mouse */
term->xterm_extended_mouse = state ? 1 : 0;
break;
case 1015: /* urxvt extended mouse */
term->urxvt_extended_mouse = state ? 1 : 0;
break;
case 1047: /* alternate screen */
compatibility(OTHER);
deselect(term);
swap_screen(term, term->no_alt_screen ? 0 : state, TRUE, TRUE);
if (term->scroll_on_disp)
term->disptop = 0;
break;
case 1048: /* save/restore cursor */
if (!term->no_alt_screen)
save_cursor(term, state);
if (!state) seen_disp_event(term);
break;
case 1049: /* cursor & alternate screen */
if (state && !term->no_alt_screen)
save_cursor(term, state);
if (!state) seen_disp_event(term);
compatibility(OTHER);
deselect(term);
swap_screen(term, term->no_alt_screen ? 0 : state, TRUE, FALSE);
if (!state && !term->no_alt_screen)
save_cursor(term, state);
if (term->scroll_on_disp)
term->disptop = 0;
break;
case 2004: /* xterm bracketed paste */
term->bracketed_paste = state ? TRUE : FALSE;
break;
} else
switch (mode) {
case 4: /* IRM: set insert mode */
compatibility(VT102);
term->insert = state;
break;
case 12: /* SRM: set echo mode */
term->term_echoing = !state;
if (term->ldisc) /* cause ldisc to notice changes */
ldisc_echoedit_update(term->ldisc);
break;
case 20: /* LNM: Return sends ... */
term->cr_lf_return = state;
break;
case 34: /* WYULCURM: Make cursor BIG */
compatibility2(OTHER, VT220);
term->big_cursor = !state;
}
}
/*
* Process an OSC sequence: set window title or icon name.
*/
static void do_osc(Terminal *term)
{
if (term->osc_w) {
while (term->osc_strlen--)
term->wordness[(unsigned char)
term->osc_string[term->osc_strlen]] = term->esc_args[0];
} else {
term->osc_string[term->osc_strlen] = '\0';
switch (term->esc_args[0]) {
case 0:
case 1:
if (!term->no_remote_wintitle)
set_icon(term->frontend, term->osc_string);
if (term->esc_args[0] == 1)
break;
/* fall through: parameter 0 means set both */
case 2:
case 21:
if (!term->no_remote_wintitle)
set_title(term->frontend, term->osc_string);
break;
}
}
}
/*
* ANSI printing routines.
*/
static void term_print_setup(Terminal *term, char *printer)
{
bufchain_clear(&term->printer_buf);
term->print_job = printer_start_job(printer);
}
static void term_print_flush(Terminal *term)
{
void *data;
int len;
int size;
while ((size = bufchain_size(&term->printer_buf)) > 5) {
bufchain_prefix(&term->printer_buf, &data, &len);
if (len > size-5)
len = size-5;
printer_job_data(term->print_job, data, len);
bufchain_consume(&term->printer_buf, len);
}
}
static void term_print_finish(Terminal *term)
{
void *data;
int len, size;
char c;
if (!term->printing && !term->only_printing)
return; /* we need do nothing */
term_print_flush(term);
while ((size = bufchain_size(&term->printer_buf)) > 0) {
bufchain_prefix(&term->printer_buf, &data, &len);
c = *(char *)data;
if (c == '\033' || c == '\233') {
bufchain_consume(&term->printer_buf, size);
break;
} else {
printer_job_data(term->print_job, &c, 1);
bufchain_consume(&term->printer_buf, 1);
}
}
printer_finish_job(term->print_job);
term->print_job = NULL;
term->printing = term->only_printing = FALSE;
}
/*
* Remove everything currently in `inbuf' and stick it up on the
* in-memory display. There's a big state machine in here to
* process escape sequences...
*/
static void term_out(Terminal *term)
{
unsigned long c;
int unget;
unsigned char localbuf[256], *chars;
int nchars = 0;
unget = -1;
chars = NULL; /* placate compiler warnings */
while (nchars > 0 || unget != -1 || bufchain_size(&term->inbuf) > 0) {
if (unget == -1) {
if (nchars == 0) {
void *ret;
bufchain_prefix(&term->inbuf, &ret, &nchars);
if (nchars > sizeof(localbuf))
nchars = sizeof(localbuf);
memcpy(localbuf, ret, nchars);
bufchain_consume(&term->inbuf, nchars);
chars = localbuf;
assert(chars != NULL);
}
c = *chars++;
nchars--;
/*
* Optionally log the session traffic to a file. Useful for
* debugging and possibly also useful for actual logging.
*/
if (term->logtype == LGTYP_DEBUG && term->logctx)
logtraffic(term->logctx, (unsigned char) c, LGTYP_DEBUG);
} else {
c = unget;
unget = -1;
}
/* Note only VT220+ are 8-bit VT102 is seven bit, it shouldn't even
* be able to display 8-bit characters, but I'll let that go 'cause
* of i18n.
*/
/*
* If we're printing, add the character to the printer
* buffer.
*/
if (term->printing) {
bufchain_add(&term->printer_buf, &c, 1);
/*
* If we're in print-only mode, we use a much simpler
* state machine designed only to recognise the ESC[4i
* termination sequence.
*/
if (term->only_printing) {
if (c == '\033')
term->print_state = 1;
else if (c == (unsigned char)'\233')
term->print_state = 2;
else if (c == '[' && term->print_state == 1)
term->print_state = 2;
else if (c == '4' && term->print_state == 2)
term->print_state = 3;
else if (c == 'i' && term->print_state == 3)
term->print_state = 4;
else
term->print_state = 0;
if (term->print_state == 4) {
term_print_finish(term);
}
continue;
}
}
/* First see about all those translations. */
if (term->termstate == TOPLEVEL) {
if (in_utf(term))
switch (term->utf_state) {
case 0:
if (c < 0x80) {
/* UTF-8 must be stateless so we ignore iso2022. */
if (term->ucsdata->unitab_ctrl[c] != 0xFF)
c = term->ucsdata->unitab_ctrl[c];
else c = ((unsigned char)c) | CSET_ASCII;
break;
} else if ((c & 0xe0) == 0xc0) {
term->utf_size = term->utf_state = 1;
term->utf_char = (c & 0x1f);
} else if ((c & 0xf0) == 0xe0) {
term->utf_size = term->utf_state = 2;
term->utf_char = (c & 0x0f);
} else if ((c & 0xf8) == 0xf0) {
term->utf_size = term->utf_state = 3;
term->utf_char = (c & 0x07);
} else if ((c & 0xfc) == 0xf8) {
term->utf_size = term->utf_state = 4;
term->utf_char = (c & 0x03);
} else if ((c & 0xfe) == 0xfc) {
term->utf_size = term->utf_state = 5;
term->utf_char = (c & 0x01);
} else {
c = UCSERR;
break;
}
continue;
case 1:
case 2:
case 3:
case 4:
case 5:
if ((c & 0xC0) != 0x80) {
unget = c;
c = UCSERR;
term->utf_state = 0;
break;
}
term->utf_char = (term->utf_char << 6) | (c & 0x3f);
if (--term->utf_state)
continue;
c = term->utf_char;
/* Is somebody trying to be evil! */
if (c < 0x80 ||
(c < 0x800 && term->utf_size >= 2) ||
(c < 0x10000 && term->utf_size >= 3) ||
(c < 0x200000 && term->utf_size >= 4) ||
(c < 0x4000000 && term->utf_size >= 5))
c = UCSERR;
/* Unicode line separator and paragraph separator are CR-LF */
if (c == 0x2028 || c == 0x2029)
c = 0x85;
/* High controls are probably a Baaad idea too. */
if (c < 0xA0)
c = 0xFFFD;
/* The UTF-16 surrogates are not nice either. */
/* The standard give the option of decoding these:
* I don't want to! */
if (c >= 0xD800 && c < 0xE000)
c = UCSERR;
/* ISO 10646 characters now limited to UTF-16 range. */
if (c > 0x10FFFF)
c = UCSERR;
/* This is currently a TagPhobic application.. */
if (c >= 0xE0000 && c <= 0xE007F)
continue;
/* U+FEFF is best seen as a null. */
if (c == 0xFEFF)
continue;
/* But U+FFFE is an error. */
if (c == 0xFFFE || c == 0xFFFF)
c = UCSERR;
break;
}
/* Are we in the nasty ACS mode? Note: no sco in utf mode. */
else if(term->sco_acs &&
(c!='\033' && c!='\012' && c!='\015' && c!='\b'))
{
if (term->sco_acs == 2) c |= 0x80;
c |= CSET_SCOACS;
} else {
switch (term->cset_attr[term->cset]) {
/*
* Linedraw characters are different from 'ESC ( B'
* only for a small range. For ones outside that
* range, make sure we use the same font as well as
* the same encoding.
*/
case CSET_LINEDRW:
if (term->ucsdata->unitab_ctrl[c] != 0xFF)
c = term->ucsdata->unitab_ctrl[c];
else
c = ((unsigned char) c) | CSET_LINEDRW;
break;
case CSET_GBCHR:
/* If UK-ASCII, make the '#' a LineDraw Pound */
if (c == '#') {
c = '}' | CSET_LINEDRW;
break;
}
/*FALLTHROUGH*/ case CSET_ASCII:
if (term->ucsdata->unitab_ctrl[c] != 0xFF)
c = term->ucsdata->unitab_ctrl[c];
else
c = ((unsigned char) c) | CSET_ASCII;
break;
case CSET_SCOACS:
if (c>=' ') c = ((unsigned char)c) | CSET_SCOACS;
break;
}
}
}
/*
* How about C1 controls?
* Explicitly ignore SCI (0x9a), which we don't translate to DECID.
*/
if ((c & -32) == 0x80 && term->termstate < DO_CTRLS &&
!term->vt52_mode && has_compat(VT220)) {
if (c == 0x9a)
c = 0;
else {
term->termstate = SEEN_ESC;
term->esc_query = FALSE;
c = '@' + (c & 0x1F);
}
}
/* Or the GL control. */
if (c == '\177' && term->termstate < DO_CTRLS && has_compat(OTHER)) {
if (term->curs.x && !term->wrapnext)
term->curs.x--;
term->wrapnext = FALSE;
/* destructive backspace might be disabled */
if (!term->no_dbackspace) {
check_boundary(term, term->curs.x, term->curs.y);
check_boundary(term, term->curs.x+1, term->curs.y);
copy_termchar(scrlineptr(term->curs.y),
term->curs.x, &term->erase_char);
}
} else
/* Or normal C0 controls. */
if ((c & ~0x1F) == 0 && term->termstate < DO_CTRLS) {
switch (c) {
case '\005': /* ENQ: terminal type query */
/*
* Strictly speaking this is VT100 but a VT100 defaults to
* no response. Other terminals respond at their option.
*
* Don't put a CR in the default string as this tends to
* upset some weird software.
*/
compatibility(ANSIMIN);
if (term->ldisc) {
lpage_send(term->ldisc, DEFAULT_CODEPAGE,
term->answerback, term->answerbacklen, 0);
}
break;
case '\007': /* BEL: Bell */
{
struct beeptime *newbeep;
unsigned long ticks;
ticks = GETTICKCOUNT();
if (!term->beep_overloaded) {
newbeep = snew(struct beeptime);
newbeep->ticks = ticks;
newbeep->next = NULL;
if (!term->beephead)
term->beephead = newbeep;
else
term->beeptail->next = newbeep;
term->beeptail = newbeep;
term->nbeeps++;
}
/*
* Throw out any beeps that happened more than
* t seconds ago.
*/
while (term->beephead &&
term->beephead->ticks < ticks - term->bellovl_t) {
struct beeptime *tmp = term->beephead;
term->beephead = tmp->next;
sfree(tmp);
if (!term->beephead)
term->beeptail = NULL;
term->nbeeps--;
}
if (term->bellovl && term->beep_overloaded &&
ticks - term->lastbeep >= (unsigned)term->bellovl_s) {
/*
* If we're currently overloaded and the
* last beep was more than s seconds ago,
* leave overload mode.
*/
term->beep_overloaded = FALSE;
} else if (term->bellovl && !term->beep_overloaded &&
term->nbeeps >= term->bellovl_n) {
/*
* Now, if we have n or more beeps
* remaining in the queue, go into overload
* mode.
*/
term->beep_overloaded = TRUE;
}
term->lastbeep = ticks;
/*
* Perform an actual beep if we're not overloaded.
*/
if (!term->bellovl || !term->beep_overloaded) {
do_beep(term->frontend, term->beep);
if (term->beep == BELL_VISUAL) {
term_schedule_vbell(term, FALSE, 0);
}
}
seen_disp_event(term);
}
break;
case '\b': /* BS: Back space */
if (term->curs.x == 0 &&
(term->curs.y == 0 || term->wrap == 0))
/* do nothing */ ;
else if (term->curs.x == 0 && term->curs.y > 0)
term->curs.x = term->cols - 1, term->curs.y--;
else if (term->wrapnext)
term->wrapnext = FALSE;
else
term->curs.x--;
seen_disp_event(term);
break;
case '\016': /* LS1: Locking-shift one */
compatibility(VT100);
term->cset = 1;
break;
case '\017': /* LS0: Locking-shift zero */
compatibility(VT100);
term->cset = 0;
break;
case '\033': /* ESC: Escape */
if (term->vt52_mode)
term->termstate = VT52_ESC;
else {
compatibility(ANSIMIN);
term->termstate = SEEN_ESC;
term->esc_query = FALSE;
}
break;
case '\015': /* CR: Carriage return */
term->curs.x = 0;
term->wrapnext = FALSE;
seen_disp_event(term);
if (term->crhaslf) {
if (term->curs.y == term->marg_b)
scroll(term, term->marg_t, term->marg_b, 1, TRUE);
else if (term->curs.y < term->rows - 1)
term->curs.y++;
}
if (term->logctx)
logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
break;
case '\014': /* FF: Form feed */
if (has_compat(SCOANSI)) {
move(term, 0, 0, 0);
erase_lots(term, FALSE, FALSE, TRUE);
if (term->scroll_on_disp)
term->disptop = 0;
term->wrapnext = FALSE;
seen_disp_event(term);
break;
}
case '\013': /* VT: Line tabulation */
compatibility(VT100);
case '\012': /* LF: Line feed */
if (term->curs.y == term->marg_b)
scroll(term, term->marg_t, term->marg_b, 1, TRUE);
else if (term->curs.y < term->rows - 1)
term->curs.y++;
if (term->lfhascr)
term->curs.x = 0;
term->wrapnext = FALSE;
seen_disp_event(term);
if (term->logctx)
logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
break;
case '\t': /* HT: Character tabulation */
{
pos old_curs = term->curs;
termline *ldata = scrlineptr(term->curs.y);
do {
term->curs.x++;
} while (term->curs.x < term->cols - 1 &&
!term->tabs[term->curs.x]);
if ((ldata->lattr & LATTR_MODE) != LATTR_NORM) {
if (term->curs.x >= term->cols / 2)
term->curs.x = term->cols / 2 - 1;
} else {
if (term->curs.x >= term->cols)
term->curs.x = term->cols - 1;
}
check_selection(term, old_curs, term->curs);
}
seen_disp_event(term);
break;
}
} else
switch (term->termstate) {
case TOPLEVEL:
/* Only graphic characters get this far;
* ctrls are stripped above */
{
termline *cline = scrlineptr(term->curs.y);
int width = 0;
if (DIRECT_CHAR(c))
width = 1;
if (!width)
width = (term->cjk_ambig_wide ?
mk_wcwidth_cjk((unsigned int) c) :
mk_wcwidth((unsigned int) c));
if (term->wrapnext && term->wrap && width > 0) {
cline->lattr |= LATTR_WRAPPED;
if (term->curs.y == term->marg_b)
scroll(term, term->marg_t, term->marg_b, 1, TRUE);
else if (term->curs.y < term->rows - 1)
term->curs.y++;
term->curs.x = 0;
term->wrapnext = FALSE;
cline = scrlineptr(term->curs.y);
}
if (term->insert && width > 0)
insch(term, width);
if (term->selstate != NO_SELECTION) {
pos cursplus = term->curs;
incpos(cursplus);
check_selection(term, term->curs, cursplus);
}
if (((c & CSET_MASK) == CSET_ASCII ||
(c & CSET_MASK) == 0) &&
term->logctx)
logtraffic(term->logctx, (unsigned char) c,
LGTYP_ASCII);
switch (width) {
case 2:
/*
* If we're about to display a double-width
* character starting in the rightmost
* column, then we do something special
* instead. We must print a space in the
* last column of the screen, then wrap;
* and we also set LATTR_WRAPPED2 which
* instructs subsequent cut-and-pasting not
* only to splice this line to the one
* after it, but to ignore the space in the
* last character position as well.
* (Because what was actually output to the
* terminal was presumably just a sequence
* of CJK characters, and we don't want a
* space to be pasted in the middle of
* those just because they had the
* misfortune to start in the wrong parity
* column. xterm concurs.)
*/
check_boundary(term, term->curs.x, term->curs.y);
check_boundary(term, term->curs.x+2, term->curs.y);
if (term->curs.x == term->cols-1) {
copy_termchar(cline, term->curs.x,
&term->erase_char);
cline->lattr |= LATTR_WRAPPED | LATTR_WRAPPED2;
if (term->curs.y == term->marg_b)
scroll(term, term->marg_t, term->marg_b,
1, TRUE);
else if (term->curs.y < term->rows - 1)
term->curs.y++;
term->curs.x = 0;
cline = scrlineptr(term->curs.y);
/* Now we must check_boundary again, of course. */
check_boundary(term, term->curs.x, term->curs.y);
check_boundary(term, term->curs.x+2, term->curs.y);
}
/* FULL-TERMCHAR */
clear_cc(cline, term->curs.x);
cline->chars[term->curs.x].chr = c;
cline->chars[term->curs.x].attr = term->curr_attr;
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;
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;
break;
case 0:
if (term->curs.x > 0) {
int x = term->curs.x - 1;
/* If we're in wrapnext state, the character
* to combine with is _here_, not to our left. */
if (term->wrapnext)
x++;
/*
* If the previous character is
* UCSWIDE, back up another one.
*/
if (cline->chars[x].chr == UCSWIDE) {
assert(x > 0);
x--;
}
add_cc(cline, x, c);
seen_disp_event(term);
}
continue;
default:
continue;
}
term->curs.x++;
if (term->curs.x == term->cols) {
term->curs.x--;
term->wrapnext = TRUE;
if (term->wrap && term->vt52_mode) {
cline->lattr |= LATTR_WRAPPED;
if (term->curs.y == term->marg_b)
scroll(term, term->marg_t, term->marg_b, 1, TRUE);
else if (term->curs.y < term->rows - 1)
term->curs.y++;
term->curs.x = 0;
term->wrapnext = FALSE;
}
}
seen_disp_event(term);
}
break;
case OSC_MAYBE_ST:
/*
* This state is virtually identical to SEEN_ESC, with the
* exception that we have an OSC sequence in the pipeline,
* and _if_ we see a backslash, we process it.
*/
if (c == '\\') {
do_osc(term);
term->termstate = TOPLEVEL;
break;
}
/* else fall through */
case SEEN_ESC:
if (c >= ' ' && c <= '/') {
if (term->esc_query)
term->esc_query = -1;
else
term->esc_query = c;
break;
}
term->termstate = TOPLEVEL;
switch (ANSI(c, term->esc_query)) {
case '[': /* enter CSI mode */
term->termstate = SEEN_CSI;
term->esc_nargs = 1;
term->esc_args[0] = ARG_DEFAULT;
term->esc_query = FALSE;
break;
case ']': /* OSC: xterm escape sequences */
/* Compatibility is nasty here, xterm, linux, decterm yuk! */
compatibility(OTHER);
term->termstate = SEEN_OSC;
term->esc_args[0] = 0;
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), 0);
break;
case 'c': /* RIS: restore power-on settings */
compatibility(VT100);
power_on(term, TRUE);
if (term->ldisc) /* cause ldisc to notice changes */
ldisc_echoedit_update(term->ldisc);
if (term->reset_132) {
if (!term->no_remote_resize)
request_resize(term->frontend, 80, term->rows);
term->reset_132 = 0;
}
if (term->scroll_on_disp)
term->disptop = 0;
seen_disp_event(term);
break;
case 'H': /* HTS: set a tab */
compatibility(VT100);
term->tabs[term->curs.x] = TRUE;
break;
case ANSI('8', '#'): /* DECALN: fills screen with Es :-) */
compatibility(VT100);
{
termline *ldata;
int i, j;
pos scrtop, scrbot;
for (i = 0; i < term->rows; i++) {
ldata = scrlineptr(i);
check_line_size(term, ldata);
for (j = 0; j < term->cols; j++) {
copy_termchar(ldata, j,
&term->basic_erase_char);
ldata->chars[j].chr = 'E';
}
ldata->lattr = LATTR_NORM;
}
if (term->scroll_on_disp)
term->disptop = 0;
seen_disp_event(term);
scrtop.x = scrtop.y = 0;
scrbot.x = 0;
scrbot.y = term->rows;
check_selection(term, scrtop, scrbot);
}
break;
case ANSI('3', '#'):
case ANSI('4', '#'):
case ANSI('5', '#'):
case ANSI('6', '#'):
compatibility(VT100);
{
int nlattr;
termline *ldata;
switch (ANSI(c, term->esc_query)) {
case ANSI('3', '#'): /* DECDHL: 2*height, top */
nlattr = LATTR_TOP;
break;
case ANSI('4', '#'): /* DECDHL: 2*height, bottom */
nlattr = LATTR_BOT;
break;
case ANSI('5', '#'): /* DECSWL: normal */
nlattr = LATTR_NORM;
break;
default: /* case ANSI('6', '#'): DECDWL: 2*width */
nlattr = LATTR_WIDE;
break;
}
ldata = scrlineptr(term->curs.y);
check_line_size(term, ldata);
ldata->lattr = nlattr;
}
break;
/* GZD4: G0 designate 94-set */
case ANSI('A', '('):
compatibility(VT100);
if (!term->no_remote_charset)
term->cset_attr[0] = CSET_GBCHR;
break;
case ANSI('B', '('):
compatibility(VT100);
if (!term->no_remote_charset)
term->cset_attr[0] = CSET_ASCII;
break;
case ANSI('0', '('):
compatibility(VT100);
if (!term->no_remote_charset)
term->cset_attr[0] = CSET_LINEDRW;
break;
case ANSI('U', '('):
compatibility(OTHER);
if (!term->no_remote_charset)
term->cset_attr[0] = CSET_SCOACS;
break;
/* G1D4: G1-designate 94-set */
case ANSI('A', ')'):
compatibility(VT100);
if (!term->no_remote_charset)
term->cset_attr[1] = CSET_GBCHR;
break;
case ANSI('B', ')'):
compatibility(VT100);
if (!term->no_remote_charset)
term->cset_attr[1] = CSET_ASCII;
break;
case ANSI('0', ')'):
compatibility(VT100);
if (!term->no_remote_charset)
term->cset_attr[1] = CSET_LINEDRW;
break;
case ANSI('U', ')'):
compatibility(OTHER);
if (!term->no_remote_charset)
term->cset_attr[1] = CSET_SCOACS;
break;
/* DOCS: Designate other coding system */
case ANSI('8', '%'): /* Old Linux code */
case ANSI('G', '%'):
compatibility(OTHER);
if (!term->no_remote_charset)
term->utf = 1;
break;
case ANSI('@', '%'):
compatibility(OTHER);
if (!term->no_remote_charset)
term->utf = 0;
break;
}
break;
case SEEN_CSI:
term->termstate = TOPLEVEL; /* default */
if (isdigit(c)) {
if (term->esc_nargs <= ARGS_MAX) {
if (term->esc_args[term->esc_nargs - 1] == ARG_DEFAULT)
term->esc_args[term->esc_nargs - 1] = 0;
if (term->esc_args[term->esc_nargs - 1] <=
UINT_MAX / 10 &&
term->esc_args[term->esc_nargs - 1] * 10 <=
UINT_MAX - c - '0')
term->esc_args[term->esc_nargs - 1] =
10 * term->esc_args[term->esc_nargs - 1] +
c - '0';
else
term->esc_args[term->esc_nargs - 1] = UINT_MAX;
}
term->termstate = SEEN_CSI;
} else if (c == ';') {
if (term->esc_nargs < ARGS_MAX)
term->esc_args[term->esc_nargs++] = ARG_DEFAULT;
term->termstate = SEEN_CSI;
} else if (c < '@') {
if (term->esc_query)
term->esc_query = -1;
else if (c == '?')
term->esc_query = TRUE;
else
term->esc_query = c;
term->termstate = SEEN_CSI;
} else
#define CLAMP(arg, lim) ((arg) = ((arg) > (lim)) ? (lim) : (arg))
switch (ANSI(c, term->esc_query)) {
case 'A': /* CUU: move up N lines */
CLAMP(term->esc_args[0], term->rows);
move(term, term->curs.x,
term->curs.y - def(term->esc_args[0], 1), 1);
seen_disp_event(term);
break;
case 'e': /* VPR: move down N lines */
compatibility(ANSI);
/* FALLTHROUGH */
case 'B': /* CUD: Cursor down */
CLAMP(term->esc_args[0], term->rows);
move(term, term->curs.x,
term->curs.y + def(term->esc_args[0], 1), 1);
seen_disp_event(term);
break;
case ANSI('c', '>'): /* DA: report xterm version */
compatibility(OTHER);
/* this reports xterm version 136 so that VIM can
use the drag messages from the mouse reporting */
if (term->ldisc)
ldisc_send(term->ldisc, "\033[>0;136;0c", 11, 0);
break;
case 'a': /* HPR: move right N cols */
compatibility(ANSI);
/* FALLTHROUGH */
case 'C': /* CUF: Cursor right */
CLAMP(term->esc_args[0], term->cols);
move(term, term->curs.x + def(term->esc_args[0], 1),
term->curs.y, 1);
seen_disp_event(term);
break;
case 'D': /* CUB: move left N cols */
CLAMP(term->esc_args[0], term->cols);
move(term, term->curs.x - def(term->esc_args[0], 1),
term->curs.y, 1);
seen_disp_event(term);
break;
case 'E': /* CNL: move down N lines and CR */
compatibility(ANSI);
CLAMP(term->esc_args[0], term->rows);
move(term, 0,
term->curs.y + def(term->esc_args[0], 1), 1);
seen_disp_event(term);
break;
case 'F': /* CPL: move up N lines and CR */
compatibility(ANSI);
CLAMP(term->esc_args[0], term->rows);
move(term, 0,
term->curs.y - def(term->esc_args[0], 1), 1);
seen_disp_event(term);
break;
case 'G': /* CHA */
case '`': /* HPA: set horizontal posn */
compatibility(ANSI);
CLAMP(term->esc_args[0], term->cols);
move(term, def(term->esc_args[0], 1) - 1,
term->curs.y, 0);
seen_disp_event(term);
break;
case 'd': /* VPA: set vertical posn */
compatibility(ANSI);
CLAMP(term->esc_args[0], term->rows);
move(term, term->curs.x,
((term->dec_om ? term->marg_t : 0) +
def(term->esc_args[0], 1) - 1),
(term->dec_om ? 2 : 0));
seen_disp_event(term);
break;
case 'H': /* CUP */
case 'f': /* HVP: set horz and vert posns at once */
if (term->esc_nargs < 2)
term->esc_args[1] = ARG_DEFAULT;
CLAMP(term->esc_args[0], term->rows);
CLAMP(term->esc_args[1], term->cols);
move(term, def(term->esc_args[1], 1) - 1,
((term->dec_om ? term->marg_t : 0) +
def(term->esc_args[0], 1) - 1),
(term->dec_om ? 2 : 0));
seen_disp_event(term);
break;
case 'J': /* ED: erase screen or parts of it */
{
unsigned int i = def(term->esc_args[0], 0);
if (i == 3) {
/* Erase Saved Lines (xterm)
* This follows Thomas Dickey's xterm. */
if (!term->no_remote_clearscroll)
term_clrsb(term);
} else {
i++;
if (i > 3)
i = 0;
erase_lots(term, FALSE, !!(i & 2), !!(i & 1));
}
}
if (term->scroll_on_disp)
term->disptop = 0;
seen_disp_event(term);
break;
case 'K': /* EL: erase line or parts of it */
{
unsigned int i = def(term->esc_args[0], 0) + 1;
if (i > 3)
i = 0;
erase_lots(term, TRUE, !!(i & 2), !!(i & 1));
}
seen_disp_event(term);
break;
case 'L': /* IL: insert lines */
compatibility(VT102);
CLAMP(term->esc_args[0], term->rows);
if (term->curs.y <= term->marg_b)
scroll(term, term->curs.y, term->marg_b,
-def(term->esc_args[0], 1), FALSE);
seen_disp_event(term);
break;
case 'M': /* DL: delete lines */
compatibility(VT102);
CLAMP(term->esc_args[0], term->rows);
if (term->curs.y <= term->marg_b)
scroll(term, term->curs.y, term->marg_b,
def(term->esc_args[0], 1),
TRUE);
seen_disp_event(term);
break;
case '@': /* ICH: insert chars */
/* XXX VTTEST says this is vt220, vt510 manual says vt102 */
compatibility(VT102);
CLAMP(term->esc_args[0], term->cols);
insch(term, def(term->esc_args[0], 1));
seen_disp_event(term);
break;
case 'P': /* DCH: delete chars */
compatibility(VT102);
CLAMP(term->esc_args[0], term->cols);
insch(term, -def(term->esc_args[0], 1));
seen_disp_event(term);
break;
case 'c': /* DA: terminal type query */
compatibility(VT100);
/* This is the response for a VT102 */
if (term->ldisc)
ldisc_send(term->ldisc, term->id_string,
strlen(term->id_string), 0);
break;
case 'n': /* DSR: cursor position query */
if (term->ldisc) {
if (term->esc_args[0] == 6) {
char buf[32];
sprintf(buf, "\033[%d;%dR", term->curs.y + 1,
term->curs.x + 1);
ldisc_send(term->ldisc, buf, strlen(buf), 0);
} else if (term->esc_args[0] == 5) {
ldisc_send(term->ldisc, "\033[0n", 4, 0);
}
}
break;
case 'h': /* SM: toggle modes to high */
case ANSI_QUE('h'):
compatibility(VT100);
{
int i;
for (i = 0; i < term->esc_nargs; i++)
toggle_mode(term, term->esc_args[i],
term->esc_query, TRUE);
}
break;
case 'i': /* MC: Media copy */
case ANSI_QUE('i'):
compatibility(VT100);
{
char *printer;
if (term->esc_nargs != 1) break;
if (term->esc_args[0] == 5 &&
(printer = conf_get_str(term->conf,
CONF_printer))[0]) {
term->printing = TRUE;
term->only_printing = !term->esc_query;
term->print_state = 0;
term_print_setup(term, printer);
} else if (term->esc_args[0] == 4 &&
term->printing) {
term_print_finish(term);
}
}
break;
case 'l': /* RM: toggle modes to low */
case ANSI_QUE('l'):
compatibility(VT100);
{
int i;
for (i = 0; i < term->esc_nargs; i++)
toggle_mode(term, term->esc_args[i],
term->esc_query, FALSE);
}
break;
case 'g': /* TBC: clear tabs */
compatibility(VT100);
if (term->esc_nargs == 1) {
if (term->esc_args[0] == 0) {
term->tabs[term->curs.x] = FALSE;
} else if (term->esc_args[0] == 3) {
int i;
for (i = 0; i < term->cols; i++)
term->tabs[i] = FALSE;
}
}
break;
case 'r': /* DECSTBM: set scroll margins */
compatibility(VT100);
if (term->esc_nargs <= 2) {
int top, bot;
CLAMP(term->esc_args[0], term->rows);
CLAMP(term->esc_args[1], term->rows);
top = def(term->esc_args[0], 1) - 1;
bot = (term->esc_nargs <= 1
|| term->esc_args[1] == 0 ?
term->rows :
def(term->esc_args[1], term->rows)) - 1;
if (bot >= term->rows)
bot = term->rows - 1;
/* VTTEST Bug 9 - if region is less than 2 lines
* don't change region.
*/
if (bot - top > 0) {
term->marg_t = top;
term->marg_b = bot;
term->curs.x = 0;
/*
* I used to think the cursor should be
* placed at the top of the newly marginned
* area. Apparently not: VMS TPU falls over
* if so.
*
* Well actually it should for
* Origin mode - RDB
*/
term->curs.y = (term->dec_om ?
term->marg_t : 0);
seen_disp_event(term);
}
}
break;
case 'm': /* SGR: set graphics rendition */
{
/*
* A VT100 without the AVO only had one
* attribute, either underline or
* reverse video depending on the
* cursor type, this was selected by
* CSI 7m.
*
* case 2:
* This is sometimes DIM, eg on the
* GIGI and Linux
* case 8:
* This is sometimes INVIS various ANSI.
* case 21:
* This like 22 disables BOLD, DIM and INVIS
*
* The ANSI colours appear on any
* terminal that has colour (obviously)
* but the interaction between sgr0 and
* the colours varies but is usually
* related to the background colour
* erase item. The interaction between
* colour attributes and the mono ones
* is also very implementation
* dependent.
*
* The 39 and 49 attributes are likely
* to be unimplemented.
*/
int i;
for (i = 0; i < term->esc_nargs; i++) {
switch (def(term->esc_args[i], 0)) {
case 0: /* restore defaults */
term->curr_attr = term->default_attr;
break;
case 1: /* enable bold */
compatibility(VT100AVO);
term->curr_attr |= ATTR_BOLD;
break;
case 21: /* (enable double underline) */
compatibility(OTHER);
case 4: /* enable underline */
compatibility(VT100AVO);
term->curr_attr |= ATTR_UNDER;
break;
case 5: /* enable blink */
compatibility(VT100AVO);
term->curr_attr |= ATTR_BLINK;
break;
case 6: /* SCO light bkgrd */
compatibility(SCOANSI);
term->blink_is_real = FALSE;
term->curr_attr |= ATTR_BLINK;
term_schedule_tblink(term);
break;
case 7: /* enable reverse video */
term->curr_attr |= ATTR_REVERSE;
break;
case 10: /* SCO acs off */
compatibility(SCOANSI);
if (term->no_remote_charset) break;
term->sco_acs = 0; break;
case 11: /* SCO acs on */
compatibility(SCOANSI);
if (term->no_remote_charset) break;
term->sco_acs = 1; break;
case 12: /* SCO acs on, |0x80 */
compatibility(SCOANSI);
if (term->no_remote_charset) break;
term->sco_acs = 2; break;
case 22: /* disable bold */
compatibility2(OTHER, VT220);
term->curr_attr &= ~ATTR_BOLD;
break;
case 24: /* disable underline */
compatibility2(OTHER, VT220);
term->curr_attr &= ~ATTR_UNDER;
break;
case 25: /* disable blink */
compatibility2(OTHER, VT220);
term->curr_attr &= ~ATTR_BLINK;
break;
case 27: /* disable reverse video */
compatibility2(OTHER, VT220);
term->curr_attr &= ~ATTR_REVERSE;
break;
case 30:
case 31:
case 32:
case 33:
case 34:
case 35:
case 36:
case 37:
/* foreground */
term->curr_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_attr &= ~ATTR_FGMASK;
term->curr_attr |=
((term->esc_args[i] - 90 + 8)
<< ATTR_FGSHIFT);
break;
case 39: /* default-foreground */
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_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_attr &= ~ATTR_BGMASK;
term->curr_attr |=
((term->esc_args[i] - 100 + 8)
<< ATTR_BGSHIFT);
break;
case 49: /* default-background */
term->curr_attr &= ~ATTR_BGMASK;
term->curr_attr |= ATTR_DEFBG;
break;
case 38: /* xterm 256-colour mode */
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);
i += 2;
}
break;
case 48: /* xterm 256-colour mode */
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);
i += 2;
}
break;
}
}
set_erase_char(term);
}
break;
case 's': /* save cursor */
save_cursor(term, TRUE);
break;
case 'u': /* restore cursor */
save_cursor(term, FALSE);
seen_disp_event(term);
break;
case 't': /* DECSLPP: set page size - ie window height */
/*
* VT340/VT420 sequence DECSLPP, DEC only allows values
* 24/25/36/48/72/144 other emulators (eg dtterm) use
* illegal values (eg first arg 1..9) for window changing
* and reports.
*/
if (term->esc_nargs <= 1
&& (term->esc_args[0] < 1 ||
term->esc_args[0] >= 24)) {
compatibility(VT340TEXT);
if (!term->no_remote_resize)
request_resize(term->frontend, term->cols,
def(term->esc_args[0], 24));
deselect(term);
} else if (term->esc_nargs >= 1 &&
term->esc_args[0] >= 1 &&
term->esc_args[0] < 24) {
compatibility(OTHER);
switch (term->esc_args[0]) {
int x, y, len;
char buf[80];
const char *p;
case 1:
set_iconic(term->frontend, FALSE);
break;
case 2:
set_iconic(term->frontend, TRUE);
break;
case 3:
if (term->esc_nargs >= 3) {
if (!term->no_remote_resize)
move_window(term->frontend,
def(term->esc_args[1], 0),
def(term->esc_args[2], 0));
}
break;
case 4:
/* We should resize the window to a given
* size in pixels here, but currently our
* resizing code isn't healthy enough to
* manage it. */
break;
case 5:
/* move to top */
set_zorder(term->frontend, TRUE);
break;
case 6:
/* move to bottom */
set_zorder(term->frontend, FALSE);
break;
case 7:
refresh_window(term->frontend);
break;
case 8:
if (term->esc_nargs >= 3) {
if (!term->no_remote_resize)
request_resize(term->frontend,
def(term->esc_args[2], term->conf_width),
def(term->esc_args[1], term->conf_height));
}
break;
case 9:
if (term->esc_nargs >= 2)
set_zoomed(term->frontend,
term->esc_args[1] ?
TRUE : FALSE);
break;
case 11:
if (term->ldisc)
ldisc_send(term->ldisc,
is_iconic(term->frontend) ?
"\033[2t" : "\033[1t", 4, 0);
break;
case 13:
if (term->ldisc) {
get_window_pos(term->frontend, &x, &y);
len = sprintf(buf, "\033[3;%u;%ut",
(unsigned)x,
(unsigned)y);
ldisc_send(term->ldisc, buf, len, 0);
}
break;
case 14:
if (term->ldisc) {
get_window_pixels(term->frontend, &x, &y);
len = sprintf(buf, "\033[4;%d;%dt", y, x);
ldisc_send(term->ldisc, buf, len, 0);
}
break;
case 18:
if (term->ldisc) {
len = sprintf(buf, "\033[8;%d;%dt",
term->rows, term->cols);
ldisc_send(term->ldisc, buf