#include <stdio.h>
#include <stdlib.h>
#include <ctype.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 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 )
#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)] & (CHAR_MASK | CSET_MASK)) == UCSWIDE ? \
(a)[(x)-1] : (a)[(x)] )
/*
* Internal prototypes.
*/
static unsigned long *resizeline(unsigned long *, int);
static unsigned long *lineptr(Terminal *, int, int);
static void do_paint(Terminal *, Context, int);
static void erase_lots(Terminal *, int, int, int);
static void swap_screen(Terminal *, int, int, int);
static void update_sbar(Terminal *);
static void deselect(Terminal *);
static void term_print_finish(Terminal *);
#ifdef OPTIMISE_SCROLL
static void scroll_display(Terminal *, int, int, int);
#endif /* OPTIMISE_SCROLL */
/*
* Resize a line to make it `cols' columns wide.
*/
static unsigned long *resizeline(unsigned long *line, int cols)
{
int i, oldlen;
unsigned long lineattrs;
if (line[0] != (unsigned long)cols) {
/*
* This line is the wrong length, which probably means it
* hasn't been accessed since a resize. Resize it now.
*/
oldlen = line[0];
lineattrs = line[oldlen + 1];
line = srealloc(line, TSIZE * (2 + cols));
line[0] = cols;
for (i = oldlen; i < cols; i++)
line[i + 1] = ERASE_CHAR;
line[cols + 1] = lineattrs & LATTR_MODE;
}
return line;
}
/*
* Retrieve a line of the screen or of the scrollback, according to
* whether the y coordinate is non-negative or negative
* (respectively).
*/
static unsigned long *lineptr(Terminal *term, int y, int lineno)
{
unsigned long *line, *newline;
tree234 *whichtree;
int treeindex;
if (y >= 0) {
whichtree = term->screen;
treeindex = y;
} else {
whichtree = term->scrollback;
treeindex = y + count234(term->scrollback);
}
line = index234(whichtree, treeindex);
/* We assume that we don't screw up and retrieve something out of range. */
assert(line != NULL);
newline = resizeline(line, term->cols);
if (newline != line) {
delpos234(whichtree, treeindex);
addpos234(whichtree, newline, treeindex);
line = newline;
}
return line + 1;
}
#define lineptr(x) lineptr(term,x,__LINE__)
/*
* Set up power-on settings for the terminal.
*/
static void power_on(Terminal *term)
{
term->curs.x = term->curs.y = 0;
term->alt_x = term->alt_y = 0;
term->savecurs.x = term->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 = term->cfg.dec_om;
term->alt_ins = term->insert = FALSE;
term->alt_wnext = term->wrapnext = term->save_wnext = FALSE;
term->alt_wrap = term->wrap = term->cfg.wrap_mode;
term->alt_cset = term->cset = term->save_cset = 0;
term->alt_utf = term->utf = term->save_utf = 0;
term->utf_state = 0;
term->alt_sco_acs = term->sco_acs = term->save_sco_acs = 0;
term->cset_attr[0] = term->cset_attr[1] = term->save_csattr = ATTR_ASCII;
term->rvideo = 0;
term->in_vbell = FALSE;
term->cursor_on = 1;
term->big_cursor = 0;
term->save_attr = term->curr_attr = ATTR_DEFAULT;
term->term_editing = term->term_echoing = FALSE;
term->app_cursor_keys = term->cfg.app_cursor;
term->app_keypad_keys = term->cfg.app_keypad;
term->use_bce = term->cfg.bce;
term->blink_is_real = term->cfg.blinktext;
term->erase_char = ERASE_CHAR;
term->alt_which = 0;
term_print_finish(term);
{
int i;
for (i = 0; i < 256; i++)
term->wordness[i] = term->cfg.wordness[i];
}
if (term->screen) {
swap_screen(term, 1, FALSE, FALSE);
erase_lots(term, FALSE, TRUE, TRUE);
swap_screen(term, 0, FALSE, FALSE);
erase_lots(term, FALSE, TRUE, TRUE);
}
}
/*
* Force a screen update.
*/
void term_update(Terminal *term)
{
Context ctx;
ctx = get_ctx(term->frontend);
if (ctx) {
int need_sbar_update = term->seen_disp_event;
if (term->seen_disp_event && term->cfg.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->cfg.scroll_on_key) {
term->disptop = 0; /* return to main screen */
term->seen_disp_event = 1;
}
}
/*
* Same as power_on(), but an external function.
*/
void term_pwron(Terminal *term)
{
power_on(term);
if (term->ldisc) /* cause ldisc to notice changes */
ldisc_send(term->ldisc, NULL, 0, 0);
fix_cpos;
term->disptop = 0;
deselect(term);
term_update(term);
}
/*
* 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, Config *cfg)
{
/*
* 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_blink, reset_charclass;
int i;
reset_wrap = (term->cfg.wrap_mode != cfg->wrap_mode);
reset_decom = (term->cfg.dec_om != cfg->dec_om);
reset_bce = (term->cfg.bce != cfg->bce);
reset_blink = (term->cfg.blinktext != cfg->blinktext);
reset_charclass = 0;
for (i = 0; i < lenof(term->cfg.wordness); i++)
if (term->cfg.wordness[i] != cfg->wordness[i])
reset_charclass = 1;
term->cfg = *cfg; /* STRUCTURE COPY */
if (reset_wrap)
term->alt_wrap = term->wrap = term->cfg.wrap_mode;
if (reset_decom)
term->alt_om = term->dec_om = term->cfg.dec_om;
if (reset_bce)
term->use_bce = term->cfg.bce;
if (reset_blink)
term->blink_is_real = term->cfg.blinktext;
if (reset_charclass)
for (i = 0; i < 256; i++)
term->wordness[i] = term->cfg.wordness[i];
if (term->cfg.no_alt_screen)
swap_screen(term, 0, FALSE, FALSE);
if (term->cfg.no_mouse_rep) {
term->xterm_mouse = 0;
set_raw_mouse_mode(term->frontend, 0);
}
if (term->cfg.no_remote_charset) {
term->cset_attr[0] = term->cset_attr[1] = ATTR_ASCII;
term->sco_acs = term->alt_sco_acs = 0;
term->utf = 0;
}
if (!*term->cfg.printer) {
term_print_finish(term);
}
}
/*
* Clear the scrollback.
*/
void term_clrsb(Terminal *term)
{
unsigned long *line;
term->disptop = 0;
while ((line = delpos234(term->scrollback, 0)) != NULL) {
sfree(line);
}
update_sbar(term);
}
/*
* Initialise the terminal.
*/
Terminal *term_init(Config *mycfg, struct unicode_data *ucsdata,
void *frontend)
{
Terminal *term;
/*
* Allocate a new Terminal structure and initialise the fields
* that need it.
*/
term = smalloc(sizeof(Terminal));
term->frontend = frontend;
term->ucsdata = ucsdata;
term->cfg = *mycfg; /* STRUCTURE COPY */
term->logctx = NULL;
term->compatibility_level = TM_PUTTY;
strcpy(term->id_string, "\033[?6c");
term->last_blink = term->last_tblink = 0;
term->paste_buffer = NULL;
term->paste_len = 0;
term->last_paste = 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->xterm_mouse = term->mouse_is_down = FALSE;
term->reset_132 = FALSE;
term->blinker = term->tblinker = 0;
term->has_focus = 1;
term->repeat_off = FALSE;
term->termstate = TOPLEVEL;
term->selstate = NO_SELECTION;
term->curstype = 0;
term->screen = term->alt_screen = term->scrollback = NULL;
term->disptop = 0;
term->disptext = term->dispcurs = NULL;
term->tabs = NULL;
deselect(term);
term->rows = term->cols = -1;
power_on(term);
term->beephead = term->beeptail = NULL;
term->nbeeps = 0;
term->lastbeep = FALSE;
term->beep_overloaded = FALSE;
term->attr_mask = 0xffffffff;
term->resize_fn = NULL;
term->resize_ctx = NULL;
return term;
}
void term_free(Terminal *term)
{
unsigned long *line;
struct beeptime *beep;
while ((line = delpos234(term->scrollback, 0)) != NULL)
sfree(line);
freetree234(term->scrollback);
while ((line = delpos234(term->screen, 0)) != NULL)
sfree(line);
freetree234(term->screen);
while ((line = delpos234(term->alt_screen, 0)) != NULL)
sfree(line);
freetree234(term->alt_screen);
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);
}
/*
* Set up the terminal for a given size.
*/
void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
{
tree234 *newalt;
unsigned long *newdisp, *line;
int i, j;
int sblen;
int save_alt_which = term->alt_which;
if (newrows == term->rows && newcols == term->cols &&
newsavelines == term->savelines)
return; /* nothing to do */
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->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 and the old screen differ in length, we
* must shunt some lines in from the scrollback or out to
* the scrollback.
*
* - If doing that fails to provide us with enough material to
* fill the new screen (i.e. the number of rows needed in
* the new screen exceeds the total number in the previous
* screen+scrollback), we must invent some blank lines to
* cover the gap.
*
* - 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 */
for (i = term->rows; i < newrows; i++) {
if (sblen > 0) {
line = delpos234(term->scrollback, --sblen);
} else {
line = smalloc(TSIZE * (newcols + 2));
line[0] = newcols;
for (j = 0; j <= newcols; j++)
line[j + 1] = ERASE_CHAR;
}
addpos234(term->screen, line, 0);
}
/* Do this loop to shrink the screen if newrows < rows */
for (i = newrows; i < term->rows; i++) {
line = delpos234(term->screen, 0);
addpos234(term->scrollback, line, sblen++);
}
assert(count234(term->screen) == newrows);
while (sblen > newsavelines) {
line = delpos234(term->scrollback, 0);
sfree(line);
sblen--;
}
assert(count234(term->scrollback) <= newsavelines);
term->disptop = 0;
newdisp = smalloc(newrows * (newcols + 1) * TSIZE);
for (i = 0; i < newrows * (newcols + 1); i++)
newdisp[i] = ATTR_INVALID;
sfree(term->disptext);
term->disptext = newdisp;
term->dispcurs = NULL;
newalt = newtree234(NULL);
for (i = 0; i < newrows; i++) {
line = smalloc(TSIZE * (newcols + 2));
line[0] = newcols;
for (j = 0; j <= newcols; j++)
line[j + 1] = term->erase_char;
addpos234(newalt, line, i);
}
if (term->alt_screen) {
while (NULL != (line = delpos234(term->alt_screen, 0)))
sfree(line);
freetree234(term->alt_screen);
}
term->alt_screen = newalt;
term->tabs = srealloc(term->tabs, newcols * sizeof(*term->tabs));
{
int i;
for (i = (term->cols > 0 ? term->cols : 0); i < newcols; i++)
term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
}
if (term->rows > 0)
term->curs.y += newrows - term->rows;
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;
term->alt_x = term->alt_y = 0;
term->wrapnext = term->alt_wnext = FALSE;
term->rows = newrows;
term->cols = newcols;
term->savelines = newsavelines;
fix_cpos;
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 (term->cols > 0 && term->rows > 0)
resize_fn(resize_ctx, term->cols, term->rows);
}
/*
* 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;
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;
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;
}
if (reset && term->screen) {
/*
* Yes, this _is_ supposed to honour background-colour-erase.
*/
erase_lots(term, FALSE, TRUE, TRUE);
}
/*
* This might not be possible if we're called during
* initialisation.
*/
if (term->screen)
fix_cpos;
}
/*
* Update the scroll bar.
*/
static void update_sbar(Terminal *term)
{
int nscroll;
nscroll = count234(term->scrollback);
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.
*
* NB this function invalidates all pointers into lines of the
* screen data structures. In particular, you MUST call fix_cpos
* after calling scroll() and before doing anything else that
* uses the cpos shortcut pointer.
*/
static void scroll(Terminal *term, int topline, int botline, int lines, int sb)
{
unsigned long *line, *line2;
int i, seltop, olddisptop, shift;
if (topline != 0 || term->alt_which != 0)
sb = FALSE;
olddisptop = term->disptop;
shift = lines;
if (lines < 0) {
while (lines < 0) {
line = delpos234(term->screen, botline);
line = resizeline(line, term->cols);
for (i = 0; i < term->cols; i++)
line[i + 1] = term->erase_char;
line[term->cols + 1] = 0;
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;
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;
term->selend.x = 0;
}
}
lines++;
}
} else {
while (lines > 0) {
line = delpos234(term->screen, topline);
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 to
* replace it, or allocate a new one if the
* scrollback isn't full.
*/
if (sblen == term->savelines) {
sblen--, line2 = delpos234(term->scrollback, 0);
} else {
line2 = smalloc(TSIZE * (term->cols + 2));
line2[0] = term->cols;
}
addpos234(term->scrollback, line, sblen);
line = line2;
/*
* 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--;
}
line = resizeline(line, term->cols);
for (i = 0; i < term->cols; i++)
line[i + 1] = term->erase_char;
line[term->cols + 1] = 0;
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->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;
}
}
lines--;
}
}
#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
/*
* Scroll the physical display, and our conception of it in disptext.
*/
static void scroll_display(Terminal *term, int topline, int botline, int lines)
{
unsigned long *start, *end;
int distance, size, i;
start = term->disptext + topline * (term->cols + 1);
end = term->disptext + (botline + 1) * (term->cols + 1);
distance = (lines > 0 ? lines : -lines) * (term->cols + 1);
size = end - start - distance;
if (lines > 0) {
memmove(start, start + distance, size * TSIZE);
if (term->dispcurs >= start + distance &&
term->dispcurs <= start + distance + size)
term->dispcurs -= distance;
for (i = 0; i < distance; i++)
(start + size)[i] |= ATTR_INVALID;
} else {
memmove(start + distance, start, size * TSIZE);
if (term->dispcurs >= start && term->dispcurs <= start + size)
term->dispcurs += distance;
for (i = 0; i < distance; i++)
start[i] |= ATTR_INVALID;
}
do_scroll(term->frontend, 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;
fix_cpos;
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;
fix_cpos;
if (term->use_bce)
term->erase_char = (' ' | ATTR_ASCII |
(term->curr_attr &
(ATTR_FGMASK | ATTR_BGMASK)));
}
}
/*
* 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)
{
unsigned long *ldata;
/* Validate input coordinates, just in case. */
if (x == 0 || x > term->cols)
return;
ldata = lineptr(y);
if (x == term->cols) {
ldata[x] &= ~LATTR_WRAPPED2;
} else {
if ((ldata[x] & (CHAR_MASK | CSET_MASK)) == UCSWIDE) {
ldata[x-1] = ldata[x] =
(ldata[x-1] &~ (CHAR_MASK | CSET_MASK)) | ATTR_ASCII | ' ';
}
}
}
/*
* 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;
unsigned long *ldata;
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);
ldata = lineptr(start.y);
while (poslt(start, end)) {
if (start.x == term->cols && !erase_lattr)
ldata[start.x] &= ~(LATTR_WRAPPED | LATTR_WRAPPED2);
else
ldata[start.x] = term->erase_char;
if (incpos(start) && start.y < term->rows)
ldata = lineptr(start.y);
}
}
/*
* 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;
pos cursplus;
unsigned long *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;
cursplus.y = term->curs.y;
cursplus.x = term->curs.x + n;
check_selection(term, term->curs, cursplus);
check_boundary(term, term->curs.x, term->curs.y);
if (dir < 0)
check_boundary(term, term->curs.x + n, term->curs.y);
ldata = lineptr(term->curs.y);
if (dir < 0) {
memmove(ldata + term->curs.x, ldata + term->curs.x + n, m * TSIZE);
while (n--)
ldata[term->curs.x + m++] = term->erase_char;
} else {
memmove(ldata + term->curs.x + n, ldata + term->curs.x, m * TSIZE);
while (n--)
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)
{
unsigned long ticks;
if (query)
switch (mode) {
case 1: /* application cursor keys */
term->app_cursor_keys = state;
break;
case 2: /* 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->cfg.blinktext;
}
break;
case 3: /* 80/132 columns */
deselect(term);
if (!term->cfg.no_remote_resize)
request_resize(term->frontend, state ? 132 : 80, term->rows);
term->reset_132 = state;
break;
case 5: /* 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.
*/
ticks = GETTICKCOUNT();
/* turn off a previous vbell to avoid inconsistencies */
if (ticks - term->vbell_startpoint >= VBELL_TIMEOUT)
term->in_vbell = FALSE;
if (term->rvideo && !state && /* we're turning it off... */
(ticks - term->rvbell_startpoint) < VBELL_TIMEOUT) {/*...soon*/
/* If there's no vbell timeout already, or this one lasts
* longer, replace vbell_timeout with ours. */
if (!term->in_vbell ||
(term->rvbell_startpoint - term->vbell_startpoint <
VBELL_TIMEOUT))
term->vbell_startpoint = term->rvbell_startpoint;
term->in_vbell = TRUE; /* may clear rvideo but set in_vbell */
} else if (!term->rvideo && state) {
/* This is an ON, so we notice the time and save it. */
term->rvbell_startpoint = ticks;
}
term->rvideo = state;
term->seen_disp_event = TRUE;
if (state)
term_update(term);
break;
case 6: /* DEC origin mode */
term->dec_om = state;
break;
case 7: /* auto wrap */
term->wrap = state;
break;
case 8: /* auto key repeat */
term->repeat_off = !state;
break;
case 10: /* set local edit mode */
term->term_editing = state;
if (term->ldisc) /* cause ldisc to notice changes */
ldisc_send(term->ldisc, NULL, 0, 0);
break;
case 25: /* enable/disable cursor */
compatibility2(OTHER, VT220);
term->cursor_on = state;
term->seen_disp_event = TRUE;
break;
case 47: /* alternate screen */
compatibility(OTHER);
deselect(term);
swap_screen(term, term->cfg.no_alt_screen ? 0 : state, FALSE, FALSE);
term->disptop = 0;
break;
case 1000: /* xterm mouse 1 */
term->xterm_mouse = state ? 1 : 0;
set_raw_mouse_mode(term->frontend, state);
break;
case 1002: /* xterm mouse 2 */
term->xterm_mouse = state ? 2 : 0;
set_raw_mouse_mode(term->frontend, state);
break;
case 1047: /* alternate screen */
compatibility(OTHER);
deselect(term);
swap_screen(term, term->cfg.no_alt_screen ? 0 : state, TRUE, TRUE);
term->disptop = 0;
break;
case 1048: /* save/restore cursor */
save_cursor(term, state);
if (!state) term->seen_disp_event = TRUE;
break;
case 1049: /* cursor & alternate screen */
if (state)
save_cursor(term, state);
if (!state) term->seen_disp_event = TRUE;
compatibility(OTHER);
deselect(term);
swap_screen(term, term->cfg.no_alt_screen ? 0 : state, TRUE, FALSE);
if (!state)
save_cursor(term, state);
term->disptop = 0;
break;
} else
switch (mode) {
case 4: /* set insert mode */
compatibility(VT102);
term->insert = state;
break;
case 12: /* set echo mode */
term->term_echoing = !state;
if (term->ldisc) /* cause ldisc to notice changes */
ldisc_send(term->ldisc, NULL, 0, 0);
break;
case 20: /* Return sends ... */
term->cr_lf_return = state;
break;
case 34: /* 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->cfg.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->cfg.no_remote_wintitle)
set_title(term->frontend, term->osc_string);
break;
}
}
}
/*
* ANSI printing routines.
*/
static void term_print_setup(Terminal *term)
{
bufchain_clear(&term->printer_buf);
term->print_job = printer_start_job(term->cfg.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...
*/
void term_out(Terminal *term)
{
int c, unget;
unsigned char localbuf[256], *chars;
int nchars = 0;
unget = -1;
chars = NULL; /* placate compiler warnings */
while (nchars > 0 || 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->cfg.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) | ATTR_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;
/* Oops this is a 16bit implementation */
if (c >= 0x10000)
c = 0xFFFD;
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 |= ATTR_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 ATTR_LINEDRW:
if (term->ucsdata->unitab_ctrl[c] != 0xFF)
c = term->ucsdata->unitab_ctrl[c];
else
c = ((unsigned char) c) | ATTR_LINEDRW;
break;
case ATTR_GBCHR:
/* If UK-ASCII, make the '#' a LineDraw Pound */
if (c == '#') {
c = '}' | ATTR_LINEDRW;
break;
}
/*FALLTHROUGH*/ case ATTR_ASCII:
if (term->ucsdata->unitab_ctrl[c] != 0xFF)
c = term->ucsdata->unitab_ctrl[c];
else
c = ((unsigned char) c) | ATTR_ASCII;
break;
case ATTR_SCOACS:
if (c>=' ') c = ((unsigned char)c) | ATTR_SCOACS;
break;
}
}
}
/* How about C1 controls ? */
if ((c & -32) == 0x80 && term->termstate < DO_CTRLS &&
!term->vt52_mode && has_compat(VT220)) {
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;
fix_cpos;
if (!term->cfg.no_dbackspace) /* destructive bksp might be disabled */
*term->cpos = (' ' | term->curr_attr | ATTR_ASCII);
} else
/* Or normal C0 controls. */
if ((c & -32) == 0 && term->termstate < DO_CTRLS) {
switch (c) {
case '\005': /* 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.
*
* An xterm returns "xterm" (5 characters)
*/
compatibility(ANSIMIN);
if (term->ldisc) {
char abuf[256], *s, *d;
int state = 0;
for (s = term->cfg.answerback, d = abuf; *s; s++) {
if (state) {
if (*s >= 'a' && *s <= 'z')
*d++ = (*s - ('a' - 1));
else if ((*s >= '@' && *s <= '_') ||
*s == '?' || (*s & 0x80))
*d++ = ('@' ^ *s);
else if (*s == '~')
*d++ = '^';
state = 0;
} else if (*s == '^') {
state = 1;
} else
*d++ = *s;
}
lpage_send(term->ldisc, DEFAULT_CODEPAGE,
abuf, d - abuf, 0);
}
break;
case '\007':
{
struct beeptime *newbeep;
unsigned long ticks;
ticks = GETTICKCOUNT();
if (!term->beep_overloaded) {
newbeep = smalloc(sizeof(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->cfg.bellovl_t) {
struct beeptime *tmp = term->beephead;
term->beephead = tmp->next;
sfree(tmp);
if (!term->beephead)
term->beeptail = NULL;
term->nbeeps--;
}
if (term->cfg.bellovl && term->beep_overloaded &&
ticks - term->lastbeep >= (unsigned)term->cfg.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->cfg.bellovl && !term->beep_overloaded &&
term->nbeeps >= term->cfg.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->cfg.bellovl || !term->beep_overloaded) {
beep(term->frontend, term->cfg.beep);
if (term->cfg.beep == BELL_VISUAL) {
term->in_vbell = TRUE;
term->vbell_startpoint = ticks;
term_update(term);
}
}
term->disptop = 0;
}
break;
case '\b':
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--;
fix_cpos;
term->seen_disp_event = TRUE;
break;
case '\016':
compatibility(VT100);
term->cset = 1;
break;
case '\017':
compatibility(VT100);
term->cset = 0;
break;
case '\033':
if (term->vt52_mode)
term->termstate = VT52_ESC;
else {
compatibility(ANSIMIN);
term->termstate = SEEN_ESC;
term->esc_query = FALSE;
}
break;
case '\015':
term->curs.x = 0;
term->wrapnext = FALSE;
fix_cpos;
term->seen_disp_event = TRUE;
term->paste_hold = 0;
if (term->logctx)
logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
break;
case '\014':
if (has_compat(SCOANSI)) {
move(term, 0, 0, 0);
erase_lots(term, FALSE, FALSE, TRUE);
term->disptop = 0;
term->wrapnext = FALSE;
term->seen_disp_event = 1;
break;
}
case '\013':
compatibility(VT100);
case '\012':
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->cfg.lfhascr)
term->curs.x = 0;
fix_cpos;
term->wrapnext = FALSE;
term->seen_disp_event = 1;
term->paste_hold = 0;
if (term->logctx)
logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
break;
case '\t':
{
pos old_curs = term->curs;
unsigned long *ldata = lineptr(term->curs.y);
do {
term->curs.x++;
} while (term->curs.x < term->cols - 1 &&
!term->tabs[term->curs.x]);
if ((ldata[term->cols] & 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;
}
fix_cpos;
check_selection(term, old_curs, term->curs);
}
term->seen_disp_event = TRUE;
break;
}
} else
switch (term->termstate) {
case TOPLEVEL:
/* Only graphic characters get this far;
* ctrls are stripped above */
if (term->wrapnext && term->wrap) {
term->cpos[1] |= 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;
fix_cpos;
term->wrapnext = FALSE;
}
if (term->insert)
insch(term, 1);
if (term->selstate != NO_SELECTION) {
pos cursplus = term->curs;
incpos(cursplus);
check_selection(term, term->curs, cursplus);
}
if (((c & CSET_MASK) == ATTR_ASCII || (c & CSET_MASK) == 0) &&
term->logctx)
logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
{
int width = 0;
if (DIRECT_CHAR(c))
width = 1;
if (!width)
width = wcwidth((wchar_t) c);
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) {
*term->cpos++ = ATTR_ASCII | ' ' | term->curr_attr;
*term->cpos |= 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;
fix_cpos;
/* 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);
}
*term->cpos++ = c | term->curr_attr;
*term->cpos++ = UCSWIDE | term->curr_attr;
term->curs.x++;
break;
case 1:
check_boundary(term, term->curs.x, term->curs.y);
check_boundary(term, term->curs.x+1, term->curs.y);
*term->cpos++ = c | term->curr_attr;
break;
default:
continue;
}
}
term->curs.x++;
if (term->curs.x == term->cols) {
term->cpos--;
term->curs.x--;
term->wrapnext = TRUE;
if (term->wrap && term->vt52_mode) {
term->cpos[1] |= 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;
fix_cpos;
term->wrapnext = FALSE;
}
}
term->seen_disp_event = 1;
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 ']': /* 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': /* save cursor */
compatibility(VT100);
save_cursor(term, TRUE);
break;
case '8': /* restore cursor */
compatibility(VT100);
save_cursor(term, FALSE);
term->seen_disp_event = TRUE;
break;
case '=':
compatibility(VT100);
term->app_keypad_keys = TRUE;
break;
case '>':
compatibility(VT100);
term->app_keypad_keys = FALSE;
break;
case 'D': /* 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++;
fix_cpos;
term->wrapnext = FALSE;
term->seen_disp_event = TRUE;
break;
case 'E': /* 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++;
fix_cpos;
term->wrapnext = FALSE;
term->seen_disp_event = TRUE;
break;
case 'M': /* 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--;
fix_cpos;
term->wrapnext = FALSE;
term->seen_disp_event = TRUE;
break;
case 'Z': /* terminal type query */
compatibility(VT100);
if (term->ldisc)
ldisc_send(term->ldisc, term->id_string,
strlen(term->id_string), 0);
break;
case 'c': /* restore power-on settings */
compatibility(VT100);
power_on(term);
if (term->ldisc) /* cause ldisc to notice changes */
ldisc_send(term->ldisc, NULL, 0, 0);
if (term->reset_132) {
if (!term->cfg.no_remote_resize)
request_resize(term->frontend, 80, term->rows);
term->reset_132 = 0;
}
fix_cpos;
term->disptop = 0;
term->seen_disp_event = TRUE;
break;
case 'H': /* set a tab */
compatibility(VT100);
term->tabs[term->curs.x] = TRUE;
break;
case ANSI('8', '#'): /* ESC # 8 fills screen with Es :-) */
compatibility(VT100);
{
unsigned long *ldata;
int i, j;
pos scrtop, scrbot;
for (i = 0; i < term->rows; i++) {
ldata = lineptr(i);
for (j = 0; j < term->cols; j++)
ldata[j] = ATTR_DEFAULT | 'E';
ldata[term->cols] = 0;
}
term->disptop = 0;
term->seen_disp_event = TRUE;
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);
{
unsigned long nlattr;
unsigned long *ldata;
switch (ANSI(c, term->esc_query)) {
case ANSI('3', '#'):
nlattr = LATTR_TOP;
break;
case ANSI('4', '#'):
nlattr = LATTR_BOT;
break;
case ANSI('5', '#'):
nlattr = LATTR_NORM;
break;
default: /* spiritually case ANSI('6', '#'): */
nlattr = LATTR_WIDE;
break;
}
ldata = lineptr(term->curs.y);
ldata[term->cols] &= ~LATTR_MODE;
ldata[term->cols] |= nlattr;
}
break;
case ANSI('A', '('):
compatibility(VT100);
if (!term->cfg.no_remote_charset)
term->cset_attr[0] = ATTR_GBCHR;
break;
case ANSI('B', '('):
compatibility(VT100);
if (!term->cfg.no_remote_charset)
term->cset_attr[0] = ATTR_ASCII;
break;
case ANSI('0', '('):
compatibility(VT100);
if (!term->cfg.no_remote_charset)
term->cset_attr[0] = ATTR_LINEDRW;
break;
case ANSI('U', '('):
compatibility(OTHER);
if (!term->cfg.no_remote_charset)
term->cset_attr[0] = ATTR_SCOACS;
break;
case ANSI('A', ')'):
compatibility(VT100);
if (!term->cfg.no_remote_charset)
term->cset_attr[1] = ATTR_GBCHR;
break;
case ANSI('B', ')'):
compatibility(VT100);
if (!term->cfg.no_remote_charset)
term->cset_attr[1] = ATTR_ASCII;
break;
case ANSI('0', ')'):
compatibility(VT100);
if (!term->cfg.no_remote_charset)
term->cset_attr[1] = ATTR_LINEDRW;
break;
case ANSI('U', ')'):
compatibility(OTHER);
if (!term->cfg.no_remote_charset)
term->cset_attr[1] = ATTR_SCOACS;
break;
case ANSI('8', '%'): /* Old Linux code */
case ANSI('G', '%'):
compatibility(OTHER);
if (!term->cfg.no_remote_charset)
term->utf = 1;
break;
case ANSI('@', '%'):
compatibility(OTHER);
if (!term->cfg.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;
term->esc_args[term->esc_nargs - 1] =
10 * term->esc_args[term->esc_nargs - 1] + c - '0';
}
term->termstate = SEEN_CSI;
} else if (c == ';') {
if (++term->esc_nargs <= ARGS_MAX)
term->esc_args[term->esc_nargs - 1] = 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
switch (ANSI(c, term->esc_query)) {
case 'A': /* move up N lines */
move(term, term->curs.x,
term->curs.y - def(term->esc_args[0], 1), 1);
term->seen_disp_event = TRUE;
break;
case 'e': /* move down N lines */
compatibility(ANSI);
/* FALLTHROUGH */
case 'B':
move(term, term->curs.x,
term->curs.y + def(term->esc_args[0], 1), 1);
term->seen_disp_event = TRUE;
break;
case ANSI('c', '>'): /* 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': /* move right N cols */
compatibility(ANSI);
/* FALLTHROUGH */
case 'C':
move(term, term->curs.x + def(term->esc_args[0], 1),
term->curs.y, 1);
term->seen_disp_event = TRUE;
break;
case 'D': /* move left N cols */
move(term, term->curs.x - def(term->esc_args[0], 1),
term->curs.y, 1);
term->seen_disp_event = TRUE;
break;
case 'E': /* move down N lines and CR */
compatibility(ANSI);
move(term, 0,
term->curs.y + def(term->esc_args[0], 1), 1);
term->seen_disp_event = TRUE;
break;
case 'F': /* move up N lines and CR */
compatibility(ANSI);
move(term, 0,
term->curs.y - def(term->esc_args[0], 1), 1);
term->seen_disp_event = TRUE;
break;
case 'G':
case '`': /* set horizontal posn */
compatibility(ANSI);
move(term, def(term->esc_args[0], 1) - 1,
term->curs.y, 0);
term->seen_disp_event = TRUE;
break;
case 'd': /* set vertical posn */
compatibility(ANSI);
move(term, term->curs.x,
((term->dec_om ? term->marg_t : 0) +
def(term->esc_args[0], 1) - 1),
(term->dec_om ? 2 : 0));
term->seen_disp_event = TRUE;
break;
case 'H':
case 'f': /* set horz and vert posns at once */
if (term->esc_nargs < 2)
term->esc_args[1] = ARG_DEFAULT;
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));
term->seen_disp_event = TRUE;
break;
case 'J': /* erase screen or parts of it */
{
unsigned int i = def(term->esc_args[0], 0) + 1;
if (i > 3)
i = 0;
erase_lots(term, FALSE, !!(i & 2), !!(i & 1));
}
term->disptop = 0;
term->seen_disp_event = TRUE;
break;
case 'K': /* 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));
}
term->seen_disp_event = TRUE;
break;
case 'L': /* insert lines */
compatibility(VT102);
if (term->curs.y <= term->marg_b)
scroll(term, term->curs.y, term->marg_b,
-def(term->esc_args[0], 1), FALSE);
fix_cpos;
term->seen_disp_event = TRUE;
break;
case 'M': /* delete lines */
compatibility(VT102);
if (term->curs.y <= term->marg_b)
scroll(term, term->curs.y, term->marg_b,
def(term->esc_args[0], 1),
TRUE);
fix_cpos;
term->seen_disp_event = TRUE;
break;
case '@': /* insert chars */
/* XXX VTTEST says this is vt220, vt510 manual says vt102 */
compatibility(VT102);
insch(term, def(term->esc_args[0], 1));
term->seen_disp_event = TRUE;
break;
case 'P': /* delete chars */
compatibility(VT102);
insch(term, -def(term->esc_args[0], 1));
term->seen_disp_event = TRUE;
break;
case 'c': /* 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': /* 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': /* 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':
case ANSI_QUE('i'):
compatibility(VT100);
{
if (term->esc_nargs != 1) break;
if (term->esc_args[0] == 5 && *term->cfg.printer) {
term->printing = TRUE;
term->only_printing = !term->esc_query;
term->print_state = 0;
term_print_setup(term);
} else if (term->esc_args[0] == 4 &&
term->printing) {
term_print_finish(term);
}
}
break;
case 'l': /* 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': /* 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': /* set scroll margins */
compatibility(VT100);
if (term->esc_nargs <= 2) {
int top, bot;
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);
fix_cpos;
term->seen_disp_event = TRUE;
}
}
break;
case 'm': /* 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 = ATTR_DEFAULT;
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 7: /* enable reverse video */
term->curr_attr |= ATTR_REVERSE;
break;
case 10: /* SCO acs off */
compatibility(SCOANSI);
if (term->cfg.no_remote_charset) break;
term->sco_acs = 0; break;
case 11: /* SCO acs on */
compatibility(SCOANSI);
if (term->cfg.no_remote_charset) break;
term->sco_acs = 1; break;
case 12: /* SCO acs on, |0x80 */
compatibility(SCOANSI);
if (term->cfg.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 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 49: /* default-background */
term->curr_attr &= ~ATTR_BGMASK;
term->curr_attr |= ATTR_DEFBG;
break;
}
}
if (term->use_bce)
term->erase_char = (' ' | ATTR_ASCII |
(term->curr_attr &
(ATTR_FGMASK |
ATTR_BGMASK)));
}
break;
case 's': /* save cursor */
save_cursor(term, TRUE);
break;
case 'u': /* restore cursor */
save_cursor(term, FALSE);
term->seen_disp_event = TRUE;
break;
case 't': /* 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->cfg.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], *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->cfg.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->cfg.no_remote_resize)
request_resize(term->frontend,
def(term->esc_args[2], term->cfg.width),
def(term->esc_args[1], term->cfg.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[1t" : "\033[2t", 4, 0);
break;
case 13:
if (term->ldisc) {
get_window_pos(term->frontend, &x, &y);
len = sprintf(buf, "\033[3;%d;%dt", x, 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", x, y);
ldisc_send(term->ldisc, buf, len, 0);
}
break;
case 18:
if (term->ldisc) {
len = sprintf(buf, "\033[8;%d;%dt",
term->rows, term->cols);
ldisc_send(term->ldisc, buf, len, 0);
}
break;
case 19:
/*
* Hmmm. Strictly speaking we
* should return `the size of the
* screen in characters', but
* that's not easy: (a) window
* furniture being what it is it's
* hard to compute, and (b) in
* resize-font mode maximising the
* window wouldn't change the
* number of characters. *shrug*. I
* think we'll ignore it for the
* moment and see if anyone
* complains, and then ask them
* what they would like it to do.
*/
break;
case 20:
if (term->ldisc) {
p = get_window_title(term->frontend, TRUE);
len = strlen(p);
ldisc_send(term->ldisc, "\033]L", 3, 0);
ldisc_send(term->ldisc, p, len, 0);
ldisc_send(term->ldisc, "\033\\", 2, 0);
}
break;
case 21:
if (term->ldisc) {
p = get_window_title(term->frontend,FALSE);
len = strlen(p);
ldisc_send(term->ldisc, "\033]l", 3, 0);
ldisc_send(term->ldisc, p, len, 0);
ldisc_send(term->ldisc, "\033\\", 2, 0);
}
break;
}
}
break;
case 'S':
compatibility(SCOANSI);
scroll(term, term->marg_t, term->marg_b,
def(term->esc_args[0], 1), TRUE);
fix_cpos;
term->wrapnext = FALSE;
term->seen_disp_event = TRUE;
break;
case 'T':
compatibility(SCOANSI);
scroll(term, term->marg_t, term->marg_b,
-def(term->esc_args[0], 1), TRUE);
fix_cpos;
term->wrapnext = FALSE;
term->seen_disp_event = TRUE;
break;
case ANSI('|', '*'):
/* VT420 sequence DECSNLS
* Set number of lines on screen
* VT420 uses VGA like hardware and can support any size in
* reasonable range (24..49 AIUI) with no default specified.
*/
compatibility(VT420);
if (term->esc_nargs == 1 && term->esc_args[0] > 0) {
if (!term->cfg.no_remote_resize)
request_resize(term->frontend, term->cols,
def(term->esc_args[0],
term->cfg.height));
deselect(term);
}
break;
case ANSI('|', '$'):
/* VT340/VT420 sequence DECSCPP
* Set number of columns per page
* Docs imply range is only 80 or 132, but I'll allow any.
*/
compatibility(VT340TEXT);
if (term->esc_nargs <= 1) {
if (!term->cfg.no_remote_resize)
request_resize(term->frontend,
def(term->esc_args[0],
term->cfg.width), term->rows);
deselect(term);
}
break;
case 'X': /* write N spaces w/o moving cursor */
/* XXX VTTEST says this is vt220, vt510 manual says vt100 */
compatibility(ANSIMIN);
{
int n = def(term->esc_args[0], 1);
pos cursplus;
unsigned long *p = term->cpos;
if (n > term->cols - term->curs.x)
n = term->cols - term->curs.x;
cursplus = term->curs;
cursplus.x += n;
check_boundary(term, term->curs.x, term->curs.y);
check_boundary(term, term->curs.x+n, term->curs.y);
check_selection(term, term->curs, cursplus);
while (n--)
*p++ = term->erase_char;
term->seen_disp_event = TRUE;
}
break;
case 'x': /* report terminal characteristics */
compatibility(VT100);
if (term->ldisc) {
char buf[32];
int i = def(term->esc_args[0], 0);
if (i == 0 || i == 1) {
strcpy(buf, "\033[2;1;1;112;112;1;0x");
buf[2] += i;
ldisc_send(term->ldisc, buf, 20, 0);
}
}
break;
case 'Z': /* BackTab for xterm */
compatibility(OTHER);
{
int i = def(term->esc_args[0], 1);
pos old_curs = term->curs;
for(;i>0 && term->curs.x>0; i--) {
do {
term->curs.x--;
} while (term->curs.x >0 &&
!term->tabs[term->curs.x]);
}
fix_cpos;
check_selection(term, old_curs, term->curs);
}
break;
case ANSI('L', '='):
compatibility(OTHER);
term->use_bce = (term->esc_args[0] <= 0);
term->erase_char = ERASE_CHAR;
if (term->use_bce)
term->erase_char = (' ' | ATTR_ASCII |
(term->curr_attr &
(ATTR_FGMASK | ATTR_BGMASK)));
break;
case ANSI('E', '='):
compatibility(OTHER);
term->blink_is_real = (term->esc_args[0] >= 1);
break;
case ANSI('p', '"'):
/*
* Allow the host to make this emulator a
* 'perfect' VT102. This first appeared in
* the VT220, but we do need to get back to
* PuTTY mode so I won't check it.
*
* The arg in 40..42,50 are a PuTTY extension.
* The 2nd arg, 8bit vs 7bit is not checked.
*
* Setting VT102 mode should also change
* the Fkeys to generate PF* codes as a
* real VT102 has no Fkeys. The VT220 does
* this, F11..F13 become ESC,BS,LF other
* Fkeys send nothing.
*
* Note ESC c will NOT change this!
*/
switch (term->esc_args[0]) {
case 61:
term->compatibility_level &= ~TM_VTXXX;
term->compatibility_level |= TM_VT102;
break;
case 62:
term->compatibility_level &= ~TM_VTXXX;
term->compatibility_level |= TM_VT220;
break;
default:
if (term->esc_args[0] > 60 &&
term->esc_args[0] < 70)
term->compatibility_level |= TM_VTXXX;
break;
case 40:
term->compatibility_level &= TM_VTXXX;
break;
case 41:
term->compatibility_level = TM_PUTTY;
break;
case 42:
term->compatibility_level = TM_SCOANSI;
break;
case ARG_DEFAULT:
term->compatibility_level = TM_PUTTY;
break;
case 50:
break;
}
/* Change the response to CSI c */
if (term->esc_args[0] == 50) {
int i;
char lbuf[64];
strcpy(term->id_string, "\033[?");
for (i = 1; i < term->esc_nargs; i++) {
if (i != 1)
strcat(term->id_string, ";");
sprintf(lbuf, "%d", term->esc_args[i]);
strcat(term->id_string, lbuf);
}
strcat(term->id_string, "c");
}
#if 0
/* Is this a good idea ?
* Well we should do a soft reset at this point ...
*/
if (!has_compat(VT420) && has_compat(VT100)) {
if (!term->cfg.no_remote_resize) {
if (term->reset_132)
request_resize(132, 24);
else
request_resize(80, 24);
}
}
#endif
break;
}
break;
case SEEN_OSC:
term->osc_w = FALSE;
switch (c) {
case 'P': /* Linux palette sequence */
term->termstate = SEEN_OSC_P;
term->osc_strlen = 0;
break;
case 'R': /* Linux palette reset */
palette_reset(term->frontend);
term_invalidate(term);
term->termstate = TOPLEVEL;
break;
case 'W': /* word-set */
term->termstate = SEEN_OSC_W;
term->osc_w = TRUE;
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
term->esc_args[0] = 10 * term->esc_args[0] + c - '0';
break;
case 'L':
/*
* Grotty hack to support xterm and DECterm title
* sequences concurrently.
*/
if (term->esc_args[0] == 2) {
term->esc_args[0] = 1;
break;
}
/* else fall through */
default:
term->termstate = OSC_STRING;
term->osc_strlen = 0;
}
break;
case OSC_STRING:
/*
* This OSC stuff is EVIL. It takes just one character to get into
* sysline mode and it's not initially obvious how to get out.
* So I've added CR and LF as string aborts.
* This shouldn't effect compatibility as I believe embedded
* control characters are supposed to be interpreted (maybe?)
* and they don't display anything useful anyway.
*
* -- RDB
*/
if (c == '\012' || c == '\015') {
term->termstate = TOPLEVEL;
} else if (c == 0234 || c == '\007') {
/*
* These characters terminate the string; ST and BEL
* terminate the sequence and trigger instant
* processing of it, whereas ESC goes back to SEEN_ESC
* mode unless it is followed by \, in which case it is
* synonymous with ST in the first place.
*/
do_osc(term);
term->termstate = TOPLEVEL;
} else if (c == '\033')
term->termstate = OSC_MAYBE_ST;
else if (term->osc_strlen < OSC_STR_MAX)
term->osc_string[term->osc_strlen++] = c;
break;
case SEEN_OSC_P:
{
int max = (term->osc_strlen == 0 ? 21 : 16);
int val;
if (c >= '0' && c <= '9')
val = c - '0';
else if (c >= 'A' && c <= 'A' + max - 10)
val = c - 'A' + 10;
else if (c >= 'a' && c <= 'a' + max - 10)
val = c - 'a' + 10;
else {
term->termstate = TOPLEVEL;
break;
}
term->osc_string[term->osc_strlen++] = val;
if (term->osc_strlen >= 7) {
palette_set(term->frontend, term->osc_string[0],
term->osc_string[1] * 16 + term->osc_string[2],
term->osc_string[3] * 16 + term->osc_string[4],
term->osc_string[5] * 16 + term->osc_string[6]);
term_invalidate(term);
term->termstate = TOPLEVEL;
}
}
break;
case SEEN_OSC_W:
switch (c) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
term->esc_args[0] = 10 * term->esc_args[0] + c - '0';
break;
default:
term->termstate = OSC_STRING;
term->osc_strlen = 0;
}
break;
case VT52_ESC:
term->termstate = TOPLEVEL;
term->seen_disp_event = TRUE;
switch (c) {
case 'A':
move(term, term->curs.x, term->curs.y - 1, 1);
break;
case 'B':
move(term, term->curs.x, term->curs.y + 1, 1);
break;
case 'C':
move(term, term->curs.x + 1, term->curs.y, 1);
break;
case 'D':
move(term, term->curs.x - 1, term->curs.y, 1);
break;
/*
* From the VT100 Manual
* NOTE: The special graphics characters in the VT100
* are different from those in the VT52
*
* From VT102 manual:
* 137 _ Blank - Same
* 140 ` Reserved - Humm.
* 141 a Solid rectangle - Similar
* 142 b 1/ - Top half of fraction for the
* 143 c 3/ - subscript numbers below.
* 144 d 5/
* 145 e 7/
* 146 f Degrees - Same
* 147 g Plus or minus - Same
* 150 h Right arrow
* 151 i Ellipsis (dots)
* 152 j Divide by
* 153 k Down arrow
* 154 l Bar at scan 0
* 155 m Bar at scan 1
* 156 n Bar at scan 2
* 157 o Bar at scan 3 - Similar
* 160 p Bar at scan 4 - Similar
* 161 q Bar at scan 5 - Similar
* 162 r Bar at scan 6 - Same
* 163 s Bar at scan 7 - Similar
* 164 t Subscript 0
* 165 u Subscript 1
* 166 v Subscript 2
* 167 w Subscript 3
* 170 x Subscript 4
* 171 y Subscript 5
* 172 z Subscript 6
* 173 { Subscript 7
* 174 | Subscript 8
* 175 } Subscript 9
* 176 ~ Paragraph
*
*/
case 'F':
term->cset_attr[term->cset = 0] = ATTR_LINEDRW;
break;
case 'G':
term->cset_attr[term->cset = 0] = ATTR_ASCII;
break;
case 'H':
move(term, 0, 0, 0);
break;
case 'I':
if (term->curs.y == 0)
scroll(term, 0, term->rows - 1, -1, TRUE);
else if (term->curs.y > 0)
term->curs.y--;
fix_cpos;
term->wrapnext = FALSE;
break;
case 'J':
erase_lots(term, FALSE, FALSE, TRUE);
term->disptop = 0;
break;
case 'K':
erase_lots(term, TRUE, FALSE, TRUE);
break;
#if 0
case 'V':
/* XXX Print cursor line */
break;
case 'W':
/* XXX Start controller mode */
break;
case 'X':
/* XXX Stop controller mode */
break;
#endif
case 'Y':
term->termstate = VT52_Y1;
break;
case 'Z':
if (term->ldisc)
ldisc_send(term->ldisc, "\033/Z", 3, 0);
break;
case '=':
term->app_keypad_keys = TRUE;
break;
case '>':
term->app_keypad_keys = FALSE;
break;
case '<':
/* XXX This should switch to VT100 mode not current or default
* VT mode. But this will only have effect in a VT220+
* emulation.
*/
term->vt52_mode = FALSE;
term->blink_is_real = term->cfg.blinktext;
break;
#if 0
case '^':
/* XXX Enter auto print mode */
break;
case '_':
/* XXX Exit auto print mode */
break;
case ']':
/* XXX Print screen */
break;
#endif
#ifdef VT52_PLUS
case 'E':
/* compatibility(ATARI) */
move(term, 0, 0, 0);
erase_lots(term, FALSE, FALSE, TRUE);
term->disptop = 0;
break;
case 'L':
/* compatibility(ATARI) */
if (term->curs.y <= term->marg_b)
scroll(term, term->curs.y, term->marg_b, -1, FALSE);
break;
case 'M':
/* compatibility(ATARI) */
if (term->curs.y <= term->marg_b)
scroll(term, term->curs.y, term->marg_b, 1, TRUE);
break;
case 'b':
/* compatibility(ATARI) */
term->termstate = VT52_FG;
break;
case 'c':
/* compatibility(ATARI) */
term->termstate = VT52_BG;
break;
case 'd':
/* compatibility(ATARI) */
erase_lots(term, FALSE, TRUE, FALSE);
term->disptop = 0;
break;
case 'e':
/* compatibility(ATARI) */
term->cursor_on = TRUE;
break;
case 'f':
/* compatibility(ATARI) */
term->cursor_on = FALSE;
break;
/* case 'j': Save cursor position - broken on ST */
/* case 'k': Restore cursor position */
case 'l':
/* compatibility(ATARI) */
erase_lots(term, TRUE, TRUE, TRUE);
term->curs.x = 0;
term->wrapnext = FALSE;
fix_cpos;
break;
case 'o':
/* compatibility(ATARI) */
erase_lots(term, TRUE, TRUE, FALSE);
break;
case 'p':
/* compatibility(ATARI) */
term->curr_attr |= ATTR_REVERSE;
break;
case 'q':
/* compatibility(ATARI) */
term->curr_attr &= ~ATTR_REVERSE;
break;
case 'v': /* wrap Autowrap on - Wyse style */
/* compatibility(ATARI) */
term->wrap = 1;
break;
case 'w': /* Autowrap off */
/* compatibility(ATARI) */
term->wrap = 0;
break;
case 'R':
/* compatibility(OTHER) */
term->vt52_bold = FALSE;
term->curr_attr = ATTR_DEFAULT;
if (term->use_bce)
term->erase_char = (' ' | ATTR_ASCII |
(term->curr_attr &
(ATTR_FGMASK | ATTR_BGMASK)));
break;
case 'S':
/* compatibility(VI50) */
term->curr_attr |= ATTR_UNDER;
break;
case 'W':
/* compatibility(VI50) */
term->curr_attr &= ~ATTR_UNDER;
break;
case 'U':
/* compatibility(VI50) */
term->vt52_bold = TRUE;
term->curr_attr |= ATTR_BOLD;
break;
case 'T':
/* compatibility(VI50) */
term->vt52_bold = FALSE;
term->curr_attr &= ~ATTR_BOLD;
break;
#endif
}
break;
case VT52_Y1:
term->termstate = VT52_Y2;
move(term, term->curs.x, c - ' ', 0);
break;
case VT52_Y2:
term->termstate = TOPLEVEL;
move(term, c - ' ', term->curs.y, 0);
break;
#ifdef VT52_PLUS
case VT52_FG:
term->termstate = TOPLEVEL;
term->curr_attr &= ~ATTR_FGMASK;
term->curr_attr &= ~ATTR_BOLD;
term->curr_attr |= (c & 0x7) << ATTR_FGSHIFT;
if ((c & 0x8) || term->vt52_bold)
term->curr_attr |= ATTR_BOLD;
if (term->use_bce)
term->erase_char = (' ' | ATTR_ASCII |
(term->curr_attr &
(ATTR_FGMASK | ATTR_BGMASK)));
break;
case VT52_BG:
term->termstate = TOPLEVEL;
term->curr_attr &= ~ATTR_BGMASK;
term->curr_attr &= ~ATTR_BLINK;
term->curr_attr |= (c & 0x7) << ATTR_BGSHIFT;
/* Note: bold background */
if (c & 0x8)
term->curr_attr |= ATTR_BLINK;
if (term->use_bce)
term->erase_char = (' ' | ATTR_ASCII |
(term->curr_attr &
(ATTR_FGMASK | ATTR_BGMASK)));
break;
#endif
default: break; /* placate gcc warning about enum use */
}
if (term->selstate != NO_SELECTION) {
pos cursplus = term->curs;
incpos(cursplus);
check_selection(term, term->curs, cursplus);
}
}
term_print_flush(term);
}
#if 0
/*
* Compare two lines to determine whether they are sufficiently
* alike to scroll-optimise one to the other. Return the degree of
* similarity.
*/
static int linecmp(Terminal *term, unsigned long *a, unsigned long *b)
{
int i, n;
for (i = n = 0; i < term->cols; i++)
n += (*a++ == *b++);
return n;
}
#endif
/*
* Given a context, update the window. Out of paranoia, we don't
* allow WM_PAINT responses to do scrolling optimisations.
*/
static void do_paint(Terminal *term, Context ctx, int may_optimise)
{
int i, j, our_curs_y, our_curs_x;
unsigned long rv, cursor;
pos scrpos;
char ch[1024];
long cursor_background = ERASE_CHAR;
unsigned long ticks;
/*
* Check the visual bell state.
*/
if (term->in_vbell) {
ticks = GETTICKCOUNT();
if (ticks - term->vbell_startpoint >= VBELL_TIMEOUT)
term->in_vbell = FALSE;
}
rv = (!term->rvideo ^ !term->in_vbell ? ATTR_REVERSE : 0);
/* Depends on:
* screen array, disptop, scrtop,
* selection, rv,
* cfg.blinkpc, blink_is_real, tblinker,
* curs.y, curs.x, blinker, cfg.blink_cur, cursor_on, has_focus, wrapnext
*/
/* Has the cursor position or type changed ? */
if (term->cursor_on) {
if (term->has_focus) {
if (term->blinker || !term->cfg.blink_cur)
cursor = TATTR_ACTCURS;
else
cursor = 0;
} else
cursor = TATTR_PASCURS;
if (term->wrapnext)
cursor |= TATTR_RIGHTCURS;
} else
cursor = 0;
our_curs_y = term->curs.y - term->disptop;
{
/*
* Adjust the cursor position in the case where it's
* resting on the right-hand half of a CJK wide character.
* xterm's behaviour here, which seems adequate to me, is
* to display the cursor covering the _whole_ character,
* exactly as if it were one space to the left.
*/
unsigned long *ldata = lineptr(term->curs.y);
our_curs_x = term->curs.x;
if (our_curs_x > 0 &&
(ldata[our_curs_x] & (CHAR_MASK | CSET_MASK)) == UCSWIDE)
our_curs_x--;
}
if (term->dispcurs && (term->curstype != cursor ||
term->dispcurs !=
term->disptext + our_curs_y * (term->cols + 1) +
our_curs_x)) {
if (term->dispcurs > term->disptext &&
(*term->dispcurs & (CHAR_MASK | CSET_MASK)) == UCSWIDE)
term->dispcurs[-1] |= ATTR_INVALID;
if ( (term->dispcurs[1] & (CHAR_MASK | CSET_MASK)) == UCSWIDE)
term->dispcurs[1] |= ATTR_INVALID;
*term->dispcurs |= ATTR_INVALID;
term->curstype = 0;
}
term->dispcurs = NULL;
/* The normal screen data */
for (i = 0; i < term->rows; i++) {
unsigned long *ldata;
int lattr;
int idx, dirty_line, dirty_run, selected;
unsigned long attr = 0;
int updated_line = 0;
int start = 0;
int ccount = 0;
int last_run_dirty = 0;
scrpos.y = i + term->disptop;
ldata = lineptr(scrpos.y);
lattr = (ldata[term->cols] & LATTR_MODE);
idx = i * (term->cols + 1);
dirty_run = dirty_line = (ldata[term->cols] !=
term->disptext[idx + term->cols]);
term->disptext[idx + term->cols] = ldata[term->cols];
for (j = 0; j < term->cols; j++, idx++) {
unsigned long tattr, tchar;
unsigned long *d = ldata + j;
int break_run;
scrpos.x = j;
tchar = (*d & (CHAR_MASK | CSET_MASK));
tattr = (*d & (ATTR_MASK ^ CSET_MASK));
switch (tchar & CSET_MASK) {
case ATTR_ASCII:
tchar = term->ucsdata->unitab_line[tchar & 0xFF];
break;
case ATTR_LINEDRW:
tchar = term->ucsdata->unitab_xterm[tchar & 0xFF];
break;
case ATTR_SCOACS:
tchar = term->ucsdata->unitab_scoacs[tchar&0xFF];
break;
}
tattr |= (tchar & CSET_MASK);
tchar &= CHAR_MASK;
if ((d[1] & (CHAR_MASK | CSET_MASK)) == UCSWIDE)
tattr |= ATTR_WIDE;
/* Video reversing things */
if (term->selstate == DRAGGING || term->selstate == SELECTED) {
if (term->seltype == LEXICOGRAPHIC)
selected = (posle(term->selstart, scrpos) &&
poslt(scrpos, term->selend));
else
selected = (posPle(term->selstart, scrpos) &&
posPlt(scrpos, term->selend));
} else
selected = FALSE;
tattr = (tattr ^ rv
^ (selected ? ATTR_REVERSE : 0));
/* 'Real' blinking ? */
if (term->blink_is_real && (tattr & ATTR_BLINK)) {
if (term->has_focus && term->tblinker) {
tchar = ' ';
tattr &= ~CSET_MASK;
tattr |= ATTR_ACP;
}
tattr &= ~ATTR_BLINK;
}
/*
* Check the font we'll _probably_ be using to see if
* the character is wide when we don't want it to be.
*/
if ((tchar | tattr) != (term->disptext[idx]& ~ATTR_NARROW)) {
if ((tattr & ATTR_WIDE) == 0 &&
char_width(ctx, (tchar | tattr) & 0xFFFF) == 2)
tattr |= ATTR_NARROW;
} else if (term->disptext[idx]&ATTR_NARROW)
tattr |= ATTR_NARROW;
/* Cursor here ? Save the 'background' */
if (i == our_curs_y && j == our_curs_x) {
cursor_background = tattr | tchar;
term->dispcurs = term->disptext + idx;
}
if ((term->disptext[idx] ^ tattr) & ATTR_WIDE)
dirty_line = TRUE;
break_run = (((tattr ^ attr) & term->attr_mask) ||
j - start >= sizeof(ch));
/* Special hack for VT100 Linedraw glyphs */
if ((attr & CSET_MASK) == 0x2300 && tchar >= 0xBA
&& tchar <= 0xBD) break_run = TRUE;
if (!term->ucsdata->dbcs_screenfont && !dirty_line) {
if ((tchar | tattr) == term->disptext[idx])
break_run = TRUE;
else if (!dirty_run && ccount == 1)
break_run = TRUE;
}
if (break_run) {
if ((dirty_run || last_run_dirty) && ccount > 0) {
do_text(ctx, start, i, ch, ccount, attr, lattr);
updated_line = 1;
}
start = j;
ccount = 0;
attr = tattr;
if (term->ucsdata->dbcs_screenfont)
last_run_dirty = dirty_run;
dirty_run = dirty_line;
}
if ((tchar | tattr) != term->disptext[idx])
dirty_run = TRUE;
ch[ccount++] = (char) tchar;
term->disptext[idx] = tchar | tattr;
/* If it's a wide char step along to the next one. */
if (tattr & ATTR_WIDE) {
if (++j < term->cols) {
idx++;
d++;
/*
* By construction above, the cursor should not
* be on the right-hand half of this character.
* Ever.
*/
assert(!(i == our_curs_y && j == our_curs_x));
if (term->disptext[idx] != *d)
dirty_run = TRUE;
term->disptext[idx] = *d;
}
}
}
if (dirty_run && ccount > 0) {
do_text(ctx, start, i, ch, ccount, attr, lattr);
updated_line = 1;
}
/* Cursor on this line ? (and changed) */
if (i == our_curs_y && (term->curstype != cursor || updated_line)) {
ch[0] = (char) (cursor_background & CHAR_MASK);
attr = (cursor_background & ATTR_MASK) | cursor;
do_cursor(ctx, our_curs_x, i, ch, 1, attr, lattr);
term->curstype = cursor;
}
}
}
/*
* Flick the switch that says if blinking things should be shown or hidden.
*/
void term_blink(Terminal *term, int flg)
{
long now, blink_diff;
now = GETTICKCOUNT();
blink_diff = now - term->last_tblink;
/* Make sure the text blinks no more than 2Hz; we'll use 0.45 s period. */
if (blink_diff < 0 || blink_diff > (TICKSPERSEC * 9 / 20)) {
term->last_tblink = now;
term->tblinker = !term->tblinker;
}
if (flg) {
term->blinker = 1;
term->last_blink = now;
return;
}
blink_diff = now - term->last_blink;
/* Make sure the cursor blinks no faster than system blink rate */
if (blink_diff >= 0 && blink_diff < (long) CURSORBLINK)
return;
term->last_blink = now;
term->blinker = !term->blinker;
}
/*
* Invalidate the whole screen so it will be repainted in full.
*/
void term_invalidate(Terminal *term)
{
int i;
for (i = 0; i < term->rows * (term->cols + 1); i++)
term->disptext[i] = ATTR_INVALID;
}
/*
* Paint the window in response to a WM_PAINT message.
*/
void term_paint(Terminal *term, Context ctx,
int left, int top, int right, int bottom, int immediately)
{
int i, j;
if (left < 0) left = 0;
if (top < 0) top = 0;
if (right >= term->cols) right = term->cols-1;
if (bottom >= term->rows) bottom = term->rows-1;
for (i = top; i <= bottom && i < term->rows; i++) {
if ((term->disptext[i * (term->cols + 1) + term->cols] &
LATTR_MODE) == LATTR_NORM)
for (j = left; j <= right && j < term->cols; j++)
term->disptext[i * (term->cols + 1) + j] = ATTR_INVALID;
else
for (j = left / 2; j <= right / 2 + 1 && j < term->cols; j++)
term->disptext[i * (term->cols + 1) + j] = ATTR_INVALID;
}
/* This should happen soon enough, also for some reason it sometimes
* fails to actually do anything when re-sizing ... painting the wrong
* window perhaps ?
*/
if (immediately)
do_paint (term, ctx, FALSE);
}
/*
* Attempt to scroll the scrollback. The second parameter gives the
* position we want to scroll to; the first is +1 to denote that
* this position is relative to the beginning of the scrollback, -1
* to denote it is relative to the end, and 0 to denote that it is
* relative to the current position.
*/
void term_scroll(Terminal *term, int rel, int where)
{
int sbtop = -count234(term->scrollback);
#ifdef OPTIMISE_SCROLL
int olddisptop = term->disptop;
int shift;
#endif /* OPTIMISE_SCROLL */
term->disptop = (rel < 0 ? 0 : rel > 0 ? sbtop : term->disptop) + where;
if (term->disptop < sbtop)
term->disptop = sbtop;
if (term->disptop > 0)
term->disptop = 0;
update_sbar(term);
#ifdef OPTIMISE_SCROLL
shift = (term->disptop - olddisptop);
if (shift < term->rows && shift > -term->rows)
scroll_display(term, 0, term->rows - 1, shift);
#endif /* OPTIMISE_SCROLL */
term_update(term);
}
static void clipme(Terminal *term, pos top, pos bottom, int rect)
{
wchar_t *workbuf;
wchar_t *wbptr; /* where next char goes within workbuf */
int old_top_x;
int wblen = 0; /* workbuf len */
int buflen; /* amount of memory allocated to workbuf */
buflen = 5120; /* Default size */
workbuf = smalloc(buflen * sizeof(wchar_t));
wbptr = workbuf; /* start filling here */
old_top_x = top.x; /* needed for rect==1 */
while (poslt(top, bottom)) {
int nl = FALSE;
unsigned long *ldata = lineptr(top.y);
pos nlpos;
/*
* nlpos will point at the maximum position on this line we
* should copy up to. So we start it at the end of the
* line...
*/
nlpos.y = top.y;
nlpos.x = term->cols;
/*
* ... move it backwards if there's unused space at the end
* of the line (and also set `nl' if this is the case,
* because in normal selection mode this means we need a
* newline at the end)...
*/
if (!(ldata[term->cols] & LATTR_WRAPPED)) {
while (((ldata[nlpos.x - 1] & 0xFF) == 0x20 ||
(DIRECT_CHAR(ldata[nlpos.x - 1]) &&
(ldata[nlpos.x - 1] & CHAR_MASK) == 0x20))
&& poslt(top, nlpos))
decpos(nlpos);
if (poslt(nlpos, bottom))
nl = TRUE;
} else if (ldata[term->cols] & LATTR_WRAPPED2) {
/* Ignore the last char on the line in a WRAPPED2 line. */
decpos(nlpos);
}
/*
* ... and then clip it to the terminal x coordinate if
* we're doing rectangular selection. (In this case we
* still did the above, so that copying e.g. the right-hand
* column from a table doesn't fill with spaces on the
* right.)
*/
if (rect) {
if (nlpos.x > bottom.x)
nlpos.x = bottom.x;
nl = (top.y < bottom.y);
}
while (poslt(top, bottom) && poslt(top, nlpos)) {
#if 0
char cbuf[16], *p;
sprintf(cbuf, "<U+%04x>", (ldata[top.x] & 0xFFFF));
#else
wchar_t cbuf[16], *p;
int uc = (ldata[top.x] & 0xFFFF);
int set, c;
if (uc == UCSWIDE) {
top.x++;
continue;
}
switch (uc & CSET_MASK) {
case ATTR_LINEDRW:
if (!term->cfg.rawcnp) {
uc = term->ucsdata->unitab_xterm[uc & 0xFF];
break;
}
case ATTR_ASCII:
uc = term->ucsdata->unitab_line[uc & 0xFF];
break;
case ATTR_SCOACS:
uc = term->ucsdata->unitab_scoacs[uc&0xFF];
break;
}
switch (uc & CSET_MASK) {
case ATTR_ACP:
uc = term->ucsdata->unitab_font[uc & 0xFF];
break;
case ATTR_OEMCP:
uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
break;
}
set = (uc & CSET_MASK);
c = (uc & CHAR_MASK);
cbuf[0] = uc;
cbuf[1] = 0;
if (DIRECT_FONT(uc)) {
if (c >= ' ' && c != 0x7F) {
char buf[4];
WCHAR wbuf[4];
int rv;
if (is_dbcs_leadbyte(term->ucsdata->font_codepage, (BYTE) c)) {
buf[0] = c;
buf[1] = (char) (0xFF & ldata[top.x + 1]);
rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 2, wbuf, 4);
top.x++;
} else {
buf[0] = c;
rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 1, wbuf, 4);
}
if (rv > 0) {
memcpy(cbuf, wbuf, rv * sizeof(wchar_t));
cbuf[rv] = 0;
}
}
}
#endif
for (p = cbuf; *p; p++) {
/* Enough overhead for trailing NL and nul */
if (wblen >= buflen - 16) {
workbuf =
srealloc(workbuf,
sizeof(wchar_t) * (buflen += 100));
wbptr = workbuf + wblen;
}
wblen++;
*wbptr++ = *p;
}
top.x++;
}
if (nl) {
int i;
for (i = 0; i < sel_nl_sz; i++) {
wblen++;
*wbptr++ = sel_nl[i];
}
}
top.y++;
top.x = rect ? old_top_x : 0;
}
#if SELECTION_NUL_TERMINATED
wblen++;
*wbptr++ = 0;
#endif
write_clip(term->frontend, workbuf, wblen, FALSE); /* transfer to clipbd */
if (buflen > 0) /* indicates we allocated this buffer */
sfree(workbuf);
}
void term_copyall(Terminal *term)
{
pos top;
top.y = -count234(term->scrollback);
top.x = 0;
clipme(term, top, term->curs, 0);
}
/*
* The wordness array is mainly for deciding the disposition of the
* US-ASCII characters.
*/
static int wordtype(Terminal *term, int uc)
{
struct ucsword {
int start, end, ctype;
};
static const struct ucsword ucs_words[] = {
{
128, 160, 0}, {
161, 191, 1}, {
215, 215, 1}, {
247, 247, 1}, {
0x037e, 0x037e, 1}, /* Greek question mark */
{
0x0387, 0x0387, 1}, /* Greek ano teleia */
{
0x055a, 0x055f, 1}, /* Armenian punctuation */
{
0x0589, 0x0589, 1}, /* Armenian full stop */
{
0x0700, 0x070d, 1}, /* Syriac punctuation */
{
0x104a, 0x104f, 1}, /* Myanmar punctuation */
{
0x10fb, 0x10fb, 1}, /* Georgian punctuation */
{
0x1361, 0x1368, 1}, /* Ethiopic punctuation */
{
0x166d, 0x166e, 1}, /* Canadian Syl. punctuation */
{
0x17d4, 0x17dc, 1}, /* Khmer punctuation */
{
0x1800, 0x180a, 1}, /* Mongolian punctuation */
{
0x2000, 0x200a, 0}, /* Various spaces */
{
0x2070, 0x207f, 2}, /* superscript */
{
0x2080, 0x208f, 2}, /* subscript */
{
0x200b, 0x27ff, 1}, /* punctuation and symbols */
{
0x3000, 0x3000, 0}, /* ideographic space */
{
0x3001, 0x3020, 1}, /* ideographic punctuation */
{
0x303f, 0x309f, 3}, /* Hiragana */
{
0x30a0, 0x30ff, 3}, /* Katakana */
{
0x3300, 0x9fff, 3}, /* CJK Ideographs */
{
0xac00, 0xd7a3, 3}, /* Hangul Syllables */
{
0xf900, 0xfaff, 3}, /* CJK Ideographs */
{
0xfe30, 0xfe6b, 1}, /* punctuation forms */
{
0xff00, 0xff0f, 1}, /* half/fullwidth ASCII */
{
0xff1a, 0xff20, 1}, /* half/fullwidth ASCII */
{
0xff3b, 0xff40, 1}, /* half/fullwidth ASCII */
{
0xff5b, 0xff64, 1}, /* half/fullwidth ASCII */
{
0xfff0, 0xffff, 0}, /* half/fullwidth ASCII */
{
0, 0, 0}
};
const struct ucsword *wptr;
uc &= (CSET_MASK | CHAR_MASK);
switch (uc & CSET_MASK) {
case ATTR_LINEDRW:
uc = term->ucsdata->unitab_xterm[uc & 0xFF];
break;
case ATTR_ASCII:
uc = term->ucsdata->unitab_line[uc & 0xFF];
break;
case ATTR_SCOACS:
uc = term->ucsdata->unitab_scoacs[uc&0xFF];
break;
}
switch (uc & CSET_MASK) {
case ATTR_ACP:
uc = term->ucsdata->unitab_font[uc & 0xFF];
break;
case ATTR_OEMCP:
uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
break;
}
/* For DBCS font's I can't do anything usefull. Even this will sometimes
* fail as there's such a thing as a double width space. :-(
*/
if (term->ucsdata->dbcs_screenfont &&
term->ucsdata->font_codepage == term->ucsdata->line_codepage)
return (uc != ' ');
if (uc < 0x80)
return term->wordness[uc];
for (wptr = ucs_words; wptr->start; wptr++) {
if (uc >= wptr->start && uc <= wptr->end)
return wptr->ctype;
}
return 2;
}
/*
* Spread the selection outwards according to the selection mode.
*/
static pos sel_spread_half(Terminal *term, pos p, int dir)
{
unsigned long *ldata;
short wvalue;
int topy = -count234(term->scrollback);
ldata = lineptr(p.y);
switch (term->selmode) {
case SM_CHAR:
/*
* In this mode, every character is a separate unit, except
* for runs of spaces at the end of a non-wrapping line.
*/
if (!(ldata[term->cols] & LATTR_WRAPPED)) {
unsigned long *q = ldata + term->cols;
while (q > ldata && (q[-1] & CHAR_MASK) == 0x20)
q--;
if (q == ldata + term->cols)
q--;
if (p.x >= q - ldata)
p.x = (dir == -1 ? q - ldata : term->cols - 1);
}
break;
case SM_WORD:
/*
* In this mode, the units are maximal runs of characters
* whose `wordness' has the same value.
*/
wvalue = wordtype(term, UCSGET(ldata, p.x));
if (dir == +1) {
while (1) {
int maxcols = (ldata[term->cols] & LATTR_WRAPPED2 ?
term->cols-1 : term->cols);
if (p.x < maxcols-1) {
if (wordtype(term, UCSGET(ldata, p.x + 1)) == wvalue)
p.x++;
else
break;
} else {
if (ldata[term->cols] & LATTR_WRAPPED) {
unsigned long *ldata2;
ldata2 = lineptr(p.y+1);
if (wordtype(term, UCSGET(ldata2, 0)) == wvalue) {
p.x = 0;
p.y++;
ldata = ldata2;
} else
break;
} else
break;
}
}
} else {
while (1) {
if (p.x > 0) {
if (wordtype(term, UCSGET(ldata, p.x - 1)) == wvalue)
p.x--;
else
break;
} else {
unsigned long *ldata2;
int maxcols;
if (p.y <= topy)
break;
ldata2 = lineptr(p.y-1);
maxcols = (ldata2[term->cols] & LATTR_WRAPPED2 ?
term->cols-1 : term->cols);
if (ldata2[term->cols] & LATTR_WRAPPED) {
if (wordtype(term, UCSGET(ldata2, maxcols-1))
== wvalue) {
p.x = maxcols-1;
p.y--;
ldata = ldata2;
} else
break;
} else
break;
}
}
}
break;
case SM_LINE:
/*
* In this mode, every line is a unit.
*/
p.x = (dir == -1 ? 0 : term->cols - 1);
break;
}
return p;
}
static void sel_spread(Terminal *term)
{
if (term->seltype == LEXICOGRAPHIC) {
term->selstart = sel_spread_half(term, term->selstart, -1);
decpos(term->selend);
term->selend = sel_spread_half(term, term->selend, +1);
incpos(term->selend);
}
}
void term_do_paste(Terminal *term)
{
wchar_t *data;
int len;
get_clip(term->frontend, &data, &len);
if (data && len > 0) {
wchar_t *p, *q;
term_seen_key_event(term); /* pasted data counts */
if (term->paste_buffer)
sfree(term->paste_buffer);
term->paste_pos = term->paste_hold = term->paste_len = 0;
term->paste_buffer = smalloc(len * sizeof(wchar_t));
p = q = data;
while (p < data + len) {
while (p < data + len &&
!(p <= data + len - sel_nl_sz &&
!memcmp(p, sel_nl, sizeof(sel_nl))))
p++;
{
int i;
for (i = 0; i < p - q; i++) {
term->paste_buffer[term->paste_len++] = q[i];
}
}
if (p <= data + len - sel_nl_sz &&
!memcmp(p, sel_nl, sizeof(sel_nl))) {
term->paste_buffer[term->paste_len++] = '\015';
p += sel_nl_sz;
}
q = p;
}
/* Assume a small paste will be OK in one go. */
if (term->paste_len < 256) {
if (term->ldisc)
luni_send(term->ldisc, term->paste_buffer, term->paste_len, 0);
if (term->paste_buffer)
sfree(term->paste_buffer);
term->paste_buffer = 0;
term->paste_pos = term->paste_hold = term->paste_len = 0;
}
}
get_clip(term->frontend, NULL, NULL);
}
void term_mouse(Terminal *term, Mouse_Button b, Mouse_Action a, int x, int y,
int shift, int ctrl, int alt)
{
pos selpoint;
unsigned long *ldata;
int raw_mouse = (term->xterm_mouse &&
!term->cfg.no_mouse_rep &&
!(term->cfg.mouse_override && shift));
int default_seltype;
if (y < 0) {
y = 0;
if (a == MA_DRAG && !raw_mouse)
term_scroll(term, 0, -1);
}
if (y >= term->rows) {
y = term->rows - 1;
if (a == MA_DRAG && !raw_mouse)
term_scroll(term, 0, +1);
}
if (x < 0) {
if (y > 0) {
x = term->cols - 1;
y--;
} else
x = 0;
}
if (x >= term->cols)
x = term->cols - 1;
selpoint.y = y + term->disptop;
selpoint.x = x;
ldata = lineptr(selpoint.y);
if ((ldata[term->cols] & LATTR_MODE) != LATTR_NORM)
selpoint.x /= 2;
if (raw_mouse) {
int encstate = 0, r, c;
char abuf[16];
if (term->ldisc) {
switch (b) {
case MBT_LEFT:
encstate = 0x20; /* left button down */
break;
case MBT_MIDDLE:
encstate = 0x21;
break;
case MBT_RIGHT:
encstate = 0x22;
break;
case MBT_WHEEL_UP:
encstate = 0x60;
break;
case MBT_WHEEL_DOWN:
encstate = 0x61;
break;
default: break; /* placate gcc warning about enum use */
}
switch (a) {
case MA_DRAG:
if (term->xterm_mouse == 1)
return;
encstate += 0x20;
break;
case MA_RELEASE:
encstate = 0x23;
term->mouse_is_down = 0;
break;
case MA_CLICK:
if (term->mouse_is_down == b)
return;
term->mouse_is_down = b;
break;
default: break; /* placate gcc warning about enum use */
}
if (shift)
encstate += 0x04;
if (ctrl)
encstate += 0x10;
r = y + 33;
c = x + 33;
sprintf(abuf, "\033[M%c%c%c", encstate, c, r);
ldisc_send(term->ldisc, abuf, 6, 0);
}
return;
}
b = translate_button(term->frontend, b);
/*
* Set the selection type (rectangular or normal) at the start
* of a selection attempt, from the state of Alt.
*/
if (!alt ^ !term->cfg.rect_select)
default_seltype = RECTANGULAR;
else
default_seltype = LEXICOGRAPHIC;
if (term->selstate == NO_SELECTION) {
term->seltype = default_seltype;
}
if (b == MBT_SELECT && a == MA_CLICK) {
deselect(term);
term->selstate = ABOUT_TO;
term->seltype = default_seltype;
term->selanchor = selpoint;
term->selmode = SM_CHAR;
} else if (b == MBT_SELECT && (a == MA_2CLK || a == MA_3CLK)) {
deselect(term);
term->selmode = (a == MA_2CLK ? SM_WORD : SM_LINE);
term->selstate = DRAGGING;
term->selstart = term->selanchor = selpoint;
term->selend = term->selstart;
incpos(term->selend);
sel_spread(term);
} else if ((b == MBT_SELECT && a == MA_DRAG) ||
(b == MBT_EXTEND && a != MA_RELEASE)) {
if (term->selstate == ABOUT_TO && poseq(term->selanchor, selpoint))
return;
if (b == MBT_EXTEND && a != MA_DRAG && term->selstate == SELECTED) {
if (term->seltype == LEXICOGRAPHIC) {
/*
* For normal selection, we extend by moving
* whichever end of the current selection is closer
* to the mouse.
*/
if (posdiff(selpoint, term->selstart) <
posdiff(term->selend, term->selstart) / 2) {
term->selanchor = term->selend;
decpos(term->selanchor);
} else {
term->selanchor = term->selstart;
}
} else {
/*
* For rectangular selection, we have a choice of
* _four_ places to put selanchor and selpoint: the
* four corners of the selection.
*/
if (2*selpoint.x < term->selstart.x + term->selend.x)
term->selanchor.x = term->selend.x-1;
else
term->selanchor.x = term->selstart.x;
if (2*selpoint.y < term->selstart.y + term->selend.y)
term->selanchor.y = term->selend.y;
else
term->selanchor.y = term->selstart.y;
}
term->selstate = DRAGGING;
}
if (term->selstate != ABOUT_TO && term->selstate != DRAGGING)
term->selanchor = selpoint;
term->selstate = DRAGGING;
if (term->seltype == LEXICOGRAPHIC) {
/*
* For normal selection, we set (selstart,selend) to
* (selpoint,selanchor) in some order.
*/
if (poslt(selpoint, term->selanchor)) {
term->selstart = selpoint;
term->selend = term->selanchor;
incpos(term->selend);
} else {
term->selstart = term->selanchor;
term->selend = selpoint;
incpos(term->selend);
}
} else {
/*
* For rectangular selection, we may need to
* interchange x and y coordinates (if the user has
* dragged in the -x and +y directions, or vice versa).
*/
term->selstart.x = min(term->selanchor.x, selpoint.x);
term->selend.x = 1+max(term->selanchor.x, selpoint.x);
term->selstart.y = min(term->selanchor.y, selpoint.y);
term->selend.y = max(term->selanchor.y, selpoint.y);
}
sel_spread(term);
} else if ((b == MBT_SELECT || b == MBT_EXTEND) && a == MA_RELEASE) {
if (term->selstate == DRAGGING) {
/*
* We've completed a selection. We now transfer the
* data to the clipboard.
*/
clipme(term, term->selstart, term->selend,
(term->seltype == RECTANGULAR));
term->selstate = SELECTED;
} else
term->selstate = NO_SELECTION;
} else if (b == MBT_PASTE
&& (a == MA_CLICK
#if MULTICLICK_ONLY_EVENT
|| a == MA_2CLK || a == MA_3CLK
#endif
)) {
request_paste(term->frontend);
}
term_update(term);
}
void term_nopaste(Terminal *term)
{
if (term->paste_len == 0)
return;
sfree(term->paste_buffer);
term->paste_buffer = NULL;
term->paste_len = 0;
}
int term_paste_pending(Terminal *term)
{
return term->paste_len != 0;
}
void term_paste(Terminal *term)
{
long now, paste_diff;
if (term->paste_len == 0)
return;
/* Don't wait forever to paste */
if (term->paste_hold) {
now = GETTICKCOUNT();
paste_diff = now - term->last_paste;
if (paste_diff >= 0 && paste_diff < 450)
return;
}
term->paste_hold = 0;
while (term->paste_pos < term->paste_len) {
int n = 0;
while (n + term->paste_pos < term->paste_len) {
if (term->paste_buffer[term->paste_pos + n++] == '\015')
break;
}
if (term->ldisc)
luni_send(term->ldisc, term->paste_buffer + term->paste_pos, n, 0);
term->paste_pos += n;
if (term->paste_pos < term->paste_len) {
term->paste_hold = 1;
return;
}
}
sfree(term->paste_buffer);
term->paste_buffer = NULL;
term->paste_len = 0;
}
static void deselect(Terminal *term)
{
term->selstate = NO_SELECTION;
term->selstart.x = term->selstart.y = term->selend.x = term->selend.y = 0;
}
void term_deselect(Terminal *term)
{
deselect(term);
term_update(term);
}
int term_ldisc(Terminal *term, int option)
{
if (option == LD_ECHO)
return term->term_echoing;
if (option == LD_EDIT)
return term->term_editing;
return FALSE;
}
/*
* from_backend(), to get data from the backend for the terminal.
*/
int from_backend(void *vterm, int is_stderr, char *data, int len)
{
Terminal *term = (Terminal *)vterm;
assert(len > 0);
bufchain_add(&term->inbuf, data, len);
/*
* term_out() always completely empties inbuf. Therefore,
* there's no reason at all to return anything other than zero
* from this function, because there _can't_ be a question of
* the remote side needing to wait until term_out() has cleared
* a backlog.
*
* This is a slightly suboptimal way to deal with SSH2 - in
* principle, the window mechanism would allow us to continue
* to accept data on forwarded ports and X connections even
* while the terminal processing was going slowly - but we
* can't do the 100% right thing without moving the terminal
* processing into a separate thread, and that might hurt
* portability. So we manage stdout buffering the old SSH1 way:
* if the terminal processing goes slowly, the whole SSH
* connection stops accepting data until it's ready.
*
* In practice, I can't imagine this causing serious trouble.
*/
return 0;
}
void term_provide_logctx(Terminal *term, void *logctx)
{
term->logctx = logctx;
}