+static void resizeline(Terminal *term, termline *line, int cols)
+{
+ int i, oldcols;
+
+ if (line->cols != cols) {
+
+ oldcols = line->cols;
+
+ /*
+ * This line is the wrong length, which probably means it
+ * hasn't been accessed since a resize. Resize it now.
+ *
+ * First, go through all the characters that will be thrown
+ * out in the resize (if we're shrinking the line) and
+ * return their cc lists to the cc free list.
+ */
+ for (i = cols; i < oldcols; i++)
+ clear_cc(line, i);
+
+ /*
+ * If we're shrinking the line, we now bodily move the
+ * entire cc section from where it started to where it now
+ * needs to be. (We have to do this before the resize, so
+ * that the data we're copying is still there. However, if
+ * we're expanding, we have to wait until _after_ the
+ * resize so that the space we're copying into is there.)
+ */
+ if (cols < oldcols)
+ memmove(line->chars + cols, line->chars + oldcols,
+ (line->size - line->cols) * TSIZE);
+
+ /*
+ * Now do the actual resize, leaving the _same_ amount of
+ * cc space as there was to begin with.
+ */
+ line->size += cols - oldcols;
+ line->chars = sresize(line->chars, line->size, TTYPE);
+ line->cols = cols;
+
+ /*
+ * If we're expanding the line, _now_ we move the cc
+ * section.
+ */
+ if (cols > oldcols)
+ memmove(line->chars + cols, line->chars + oldcols,
+ (line->size - line->cols) * TSIZE);
+
+ /*
+ * Go through what's left of the original line, and adjust
+ * the first cc_next pointer in each list. (All the
+ * subsequent ones are still valid because they are
+ * relative offsets within the cc block.) Also do the same
+ * to the head of the cc_free list.
+ */
+ for (i = 0; i < oldcols && i < cols; i++)
+ if (line->chars[i].cc_next)
+ line->chars[i].cc_next += cols - oldcols;
+ if (line->cc_free)
+ line->cc_free += cols - oldcols;
+
+ /*
+ * And finally fill in the new space with erase chars. (We
+ * don't have to worry about cc lists here, because we
+ * _know_ the erase char doesn't have one.)
+ */
+ for (i = oldcols; i < cols; i++)
+ line->chars[i] = term->basic_erase_char;
+
+ cc_check(line); /* XXX-REMOVE-BEFORE-RELEASE */
+ }
+}
+
+/*
+ * Get the number of lines in the scrollback.
+ */
+static int sblines(Terminal *term)
+{
+ int sblines = count234(term->scrollback);
+ if (term->cfg.erase_to_scrollback &&
+ term->alt_which && term->alt_screen) {
+ sblines += term->alt_sblines;
+ }
+ return sblines;
+}
+
+/*
+ * Retrieve a line of the screen or of the scrollback, according to
+ * whether the y coordinate is non-negative or negative
+ * (respectively).
+ */
+static termline *lineptr(Terminal *term, int y, int lineno, int screen)
+{
+ termline *line;
+ tree234 *whichtree;
+ int treeindex;
+
+ if (y >= 0) {
+ whichtree = term->screen;
+ treeindex = y;
+ } else {
+ int altlines = 0;
+
+ assert(!screen);
+
+ if (term->cfg.erase_to_scrollback &&
+ term->alt_which && term->alt_screen) {
+ altlines = term->alt_sblines;
+ }
+ if (y < -altlines) {
+ whichtree = term->scrollback;
+ treeindex = y + altlines + count234(term->scrollback);
+ } else {
+ whichtree = term->alt_screen;
+ treeindex = y + term->alt_sblines;
+ /* treeindex = y + count234(term->alt_screen); */
+ }
+ }
+ if (whichtree == term->scrollback) {
+ unsigned char *cline = index234(whichtree, treeindex);
+ line = decompressline(cline, NULL);
+ } else {
+ line = index234(whichtree, treeindex);
+ }
+
+ /* We assume that we don't screw up and retrieve something out of range. */
+ assert(line != NULL);
+
+ resizeline(term, line, term->cols);
+ /* FIXME: should we sort the compressed scrollback out here? */
+
+ return line;
+}
+
+#define lineptr(x) (lineptr)(term,x,__LINE__,FALSE)
+#define scrlineptr(x) (lineptr)(term,x,__LINE__,TRUE)
+
+static void term_schedule_tblink(Terminal *term);
+static void term_schedule_cblink(Terminal *term);
+
+static void term_timer(void *ctx, long now)
+{
+ Terminal *term = (Terminal *)ctx;
+ int update = FALSE;
+
+ if (term->tblink_pending && now - term->next_tblink >= 0) {
+ term->tblinker = !term->tblinker;
+ term->tblink_pending = FALSE;
+ term_schedule_tblink(term);
+ update = TRUE;
+ }
+
+ if (term->cblink_pending && now - term->next_cblink >= 0) {
+ term->cblinker = !term->cblinker;
+ term->cblink_pending = FALSE;
+ term_schedule_cblink(term);
+ update = TRUE;
+ }
+
+ if (term->in_vbell && now - term->vbell_end >= 0) {
+ term->in_vbell = FALSE;
+ update = TRUE;
+ }
+
+ if (update ||
+ (term->window_update_pending && now - term->next_update >= 0))
+ term_update(term);
+}
+
+static void term_schedule_update(Terminal *term)
+{
+ if (!term->window_update_pending) {
+ term->window_update_pending = TRUE;
+ term->next_update = schedule_timer(UPDATE_DELAY, term_timer, term);
+ }
+}
+
+/*
+ * Call this whenever the terminal window state changes, to queue
+ * an update.
+ */
+static void seen_disp_event(Terminal *term)
+{
+ term->seen_disp_event = TRUE; /* for scrollback-reset-on-activity */
+ term_schedule_update(term);
+}
+
+/*
+ * Call when the terminal's blinking-text settings change, or when
+ * a text blink has just occurred.
+ */
+static void term_schedule_tblink(Terminal *term)
+{
+ if (term->blink_is_real) {
+ if (!term->tblink_pending)
+ term->next_tblink = schedule_timer(TBLINK_DELAY, term_timer, term);
+ term->tblink_pending = TRUE;
+ } else {
+ term->tblinker = 1; /* reset when not in use */
+ term->tblink_pending = FALSE;
+ }
+}
+
+/*
+ * Likewise with cursor blinks.
+ */
+static void term_schedule_cblink(Terminal *term)
+{
+ if (term->cfg.blink_cur && term->has_focus) {
+ if (!term->cblink_pending)
+ term->next_cblink = schedule_timer(CBLINK_DELAY, term_timer, term);
+ term->cblink_pending = TRUE;
+ } else {
+ term->cblinker = 1; /* reset when not in use */
+ term->cblink_pending = FALSE;
+ }
+}
+
+/*
+ * Call to reset cursor blinking on new output.
+ */
+static void term_reset_cblink(Terminal *term)
+{
+ seen_disp_event(term);
+ term->cblinker = 1;
+ term->cblink_pending = FALSE;
+ term_schedule_cblink(term);
+}
+
+/*
+ * Call to begin a visual bell.
+ */
+static void term_schedule_vbell(Terminal *term, int already_started,
+ long startpoint)
+{
+ long ticks_already_gone;
+
+ if (already_started)
+ ticks_already_gone = GETTICKCOUNT() - startpoint;
+ else
+ ticks_already_gone = 0;
+
+ if (ticks_already_gone < VBELL_DELAY) {
+ term->in_vbell = TRUE;
+ term->vbell_end = schedule_timer(VBELL_DELAY - ticks_already_gone,
+ term_timer, term);
+ } else {
+ term->in_vbell = FALSE;
+ }
+}
+
+/*
+ * Set up power-on settings for the terminal.
+ */
+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 = CSET_ASCII;
+ term->rvideo = 0;
+ term->in_vbell = FALSE;
+ term->cursor_on = 1;
+ term->big_cursor = 0;
+ term->default_attr = 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 = term->basic_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);
+ }
+ term_schedule_tblink(term);
+ term_schedule_cblink(term);
+}
+
+/*
+ * Force a screen update.
+ */
+void term_update(Terminal *term)
+{
+ Context ctx;
+
+ term->window_update_pending = FALSE;
+
+ ctx = get_ctx(term->frontend);
+ if (ctx) {
+ int need_sbar_update = term->seen_disp_event;
+ if (term->seen_disp_event && term->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 */
+ seen_disp_event(term);
+ }
+}
+
+/*
+ * 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);
+ term->disptop = 0;
+ deselect(term);
+ term_update(term);
+}
+
+static void set_erase_char(Terminal *term)
+{
+ term->erase_char = term->basic_erase_char;
+ if (term->use_bce)
+ term->erase_char.attr = (term->curr_attr &
+ (ATTR_FGMASK | ATTR_BGMASK));
+}
+
+/*
+ * 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_tblink, 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_tblink = (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;
+
+ /*
+ * If the bidi or shaping settings have changed, flush the bidi
+ * cache completely.
+ */
+ if (term->cfg.arabicshaping != cfg->arabicshaping ||
+ term->cfg.bidi != cfg->bidi) {
+ for (i = 0; i < term->bidi_cache_size; i++) {
+ sfree(term->pre_bidi_cache[i].chars);
+ sfree(term->post_bidi_cache[i].chars);
+ term->pre_bidi_cache[i].width = -1;
+ term->pre_bidi_cache[i].chars = NULL;
+ term->post_bidi_cache[i].width = -1;
+ term->post_bidi_cache[i].chars = NULL;
+ }
+ }
+
+ 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;
+ set_erase_char(term);
+ }
+ if (reset_tblink) {
+ 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] = CSET_ASCII;
+ term->sco_acs = term->alt_sco_acs = 0;
+ term->utf = 0;
+ }
+ if (!*term->cfg.printer) {
+ term_print_finish(term);
+ }
+ term_schedule_tblink(term);
+ term_schedule_cblink(term);
+}
+
+/*
+ * Clear the scrollback.
+ */
+void term_clrsb(Terminal *term)
+{
+ termline *line;
+ term->disptop = 0;
+ while ((line = delpos234(term->scrollback, 0)) != NULL) {
+ sfree(line); /* this is compressed data, not a termline */
+ }
+ term->tempsblines = 0;
+ term->alt_sblines = 0;
+ 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 = snew(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->cblink_pending = term->tblink_pending = FALSE;
+ 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->cblinker = 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->tempsblines = 0;
+ term->alt_sblines = 0;
+ term->disptop = 0;
+ term->disptext = NULL;
+ term->dispcursx = term->dispcursy = -1;
+ term->tabs = NULL;
+ deselect(term);
+ term->rows = term->cols = -1;
+ power_on(term);
+ term->beephead = term->beeptail = NULL;
+#ifdef OPTIMISE_SCROLL
+ term->scrollhead = term->scrolltail = NULL;
+#endif /* OPTIMISE_SCROLL */
+ term->nbeeps = 0;
+ term->lastbeep = FALSE;
+ term->beep_overloaded = FALSE;
+ term->attr_mask = 0xffffffff;
+ term->resize_fn = NULL;
+ term->resize_ctx = NULL;
+ term->in_term_out = FALSE;
+ term->ltemp = NULL;
+ term->ltemp_size = 0;
+ term->wcFrom = NULL;
+ term->wcTo = NULL;
+ term->wcFromTo_size = 0;
+
+ term->window_update_pending = FALSE;
+
+ term->bidi_cache_size = 0;
+ term->pre_bidi_cache = term->post_bidi_cache = NULL;
+
+ /* FULL-TERMCHAR */
+ term->basic_erase_char.chr = CSET_ASCII | ' ';
+ term->basic_erase_char.attr = ATTR_DEFAULT;
+ term->basic_erase_char.cc_next = 0;
+ term->erase_char = term->basic_erase_char;
+
+ return term;
+}
+
+void term_free(Terminal *term)
+{
+ termline *line;
+ struct beeptime *beep;
+ int i;
+
+ while ((line = delpos234(term->scrollback, 0)) != NULL)
+ sfree(line); /* compressed data, not a termline */
+ freetree234(term->scrollback);
+ while ((line = delpos234(term->screen, 0)) != NULL)
+ freeline(line);
+ freetree234(term->screen);
+ while ((line = delpos234(term->alt_screen, 0)) != NULL)
+ freeline(line);
+ freetree234(term->alt_screen);
+ if (term->disptext) {
+ for (i = 0; i < term->rows; i++)
+ freeline(term->disptext[i]);
+ }
+ sfree(term->disptext);
+ while (term->beephead) {
+ beep = term->beephead;
+ term->beephead = beep->next;
+ sfree(beep);
+ }
+ bufchain_clear(&term->inbuf);
+ if(term->print_job)
+ printer_finish_job(term->print_job);
+ bufchain_clear(&term->printer_buf);
+ sfree(term->paste_buffer);
+ sfree(term->ltemp);
+ sfree(term->wcFrom);
+ sfree(term->wcTo);
+
+ for (i = 0; i < term->bidi_cache_size; i++) {
+ sfree(term->pre_bidi_cache[i].chars);
+ sfree(term->post_bidi_cache[i].chars);
+ }
+ sfree(term->pre_bidi_cache);
+ sfree(term->post_bidi_cache);
+
+ expire_timer_context(term);
+
+ sfree(term);
+}
+
+/*
+ * Set up the terminal for a given size.
+ */
+void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
+{
+ tree234 *newalt;
+ termline **newdisp, *line;
+ int i, j, oldrows = term->rows;
+ int sblen;
+ int save_alt_which = term->alt_which;
+
+ if (newrows == term->rows && newcols == term->cols &&
+ newsavelines == term->savelines)
+ return; /* nothing to do */
+
+ deselect(term);
+ swap_screen(term, 0, FALSE, FALSE);
+
+ term->alt_t = term->marg_t = 0;
+ term->alt_b = term->marg_b = newrows - 1;
+
+ if (term->rows == -1) {
+ term->scrollback = newtree234(NULL);
+ term->screen = newtree234(NULL);
+ term->tempsblines = 0;
+ term->rows = 0;
+ }
+
+ /*
+ * Resize the screen and scrollback. We only need to shift
+ * lines around within our data structures, because lineptr()
+ * will take care of resizing each individual line if
+ * necessary. So:
+ *
+ * - If the new screen is longer, we shunt lines in from temporary
+ * scrollback if possible, otherwise we add new blank lines at
+ * the bottom.
+ *
+ * - If the new screen is shorter, we remove any blank lines at
+ * the bottom if possible, otherwise shunt lines above the cursor
+ * to scrollback if possible, otherwise delete lines below the
+ * cursor.
+ *
+ * - Then, if the new scrollback length is less than the
+ * amount of scrollback we actually have, we must throw some
+ * away.
+ */
+ sblen = count234(term->scrollback);
+ /* Do this loop to expand the screen if newrows > rows */
+ assert(term->rows == count234(term->screen));
+ while (term->rows < newrows) {
+ if (term->tempsblines > 0) {
+ unsigned char *cline;
+ /* Insert a line from the scrollback at the top of the screen. */
+ assert(sblen >= term->tempsblines);
+ cline = delpos234(term->scrollback, --sblen);
+ line = decompressline(cline, NULL);
+ sfree(cline);
+ line->temporary = FALSE; /* reconstituted line is now real */
+ term->tempsblines -= 1;
+ addpos234(term->screen, line, 0);
+ term->curs.y += 1;
+ term->savecurs.y += 1;
+ } else {
+ /* Add a new blank line at the bottom of the screen. */
+ line = newline(term, newcols, FALSE);
+ addpos234(term->screen, line, count234(term->screen));
+ }
+ term->rows += 1;
+ }
+ /* Do this loop to shrink the screen if newrows < rows */
+ while (term->rows > newrows) {
+ if (term->curs.y < term->rows - 1) {
+ /* delete bottom row, unless it contains the cursor */
+ sfree(delpos234(term->screen, term->rows - 1));
+ } else {
+ /* push top row to scrollback */
+ line = delpos234(term->screen, 0);
+ addpos234(term->scrollback, compressline(line), sblen++);
+ freeline(line);
+ term->tempsblines += 1;
+ term->curs.y -= 1;
+ term->savecurs.y -= 1;
+ }
+ term->rows -= 1;
+ }
+ assert(term->rows == newrows);
+ assert(count234(term->screen) == newrows);
+
+ /* Delete any excess lines from the scrollback. */
+ while (sblen > newsavelines) {
+ line = delpos234(term->scrollback, 0);
+ sfree(line);
+ sblen--;
+ }
+ if (sblen < term->tempsblines)
+ term->tempsblines = sblen;
+ assert(count234(term->scrollback) <= newsavelines);
+ assert(count234(term->scrollback) >= term->tempsblines);
+ term->disptop = 0;
+
+ /* Make a new displayed text buffer. */
+ newdisp = snewn(newrows, termline *);
+ for (i = 0; i < newrows; i++) {
+ newdisp[i] = newline(term, newcols, FALSE);
+ for (j = 0; j < newcols; j++)
+ newdisp[i]->chars[j].attr = ATTR_INVALID;
+ }
+ if (term->disptext) {
+ for (i = 0; i < oldrows; i++)
+ freeline(term->disptext[i]);
+ }
+ sfree(term->disptext);
+ term->disptext = newdisp;
+ term->dispcursx = term->dispcursy = -1;
+
+ /* Make a new alternate screen. */
+ newalt = newtree234(NULL);
+ for (i = 0; i < newrows; i++) {
+ line = newline(term, newcols, TRUE);
+ addpos234(newalt, line, i);
+ }
+ if (term->alt_screen) {
+ while (NULL != (line = delpos234(term->alt_screen, 0)))
+ freeline(line);
+ freetree234(term->alt_screen);
+ }
+ term->alt_screen = newalt;
+ term->alt_sblines = 0;
+
+ term->tabs = sresize(term->tabs, newcols, unsigned char);
+ {
+ int i;
+ for (i = (term->cols > 0 ? term->cols : 0); i < newcols; i++)
+ term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
+ }
+
+ /* Check that the cursor positions are still valid. */
+ if (term->savecurs.y < 0)
+ term->savecurs.y = 0;
+ if (term->savecurs.y >= newrows)
+ term->savecurs.y = newrows - 1;
+ if (term->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;
+
+ 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);
+}
+
+/* Find the bottom line on the screen that has any content.
+ * If only the top line has content, returns 0.
+ * If no lines have content, return -1.
+ */
+static int find_last_nonempty_line(Terminal * term, tree234 * screen)
+{
+ int i;
+ for (i = count234(screen) - 1; i >= 0; i--) {
+ termline *line = index234(screen, i);
+ int j;
+ for (j = 0; j < line->cols; j++)
+ if (!termchars_equal(&line->chars[j], &term->erase_char))
+ break;
+ if (j != line->cols) break;
+ }
+ return i;
+}
+
+/*
+ * Swap screens. If `reset' is TRUE and we have been asked to
+ * switch to the alternate screen, we must bring most of its
+ * configuration from the main screen and erase the contents of the
+ * alternate screen completely. (This is even true if we're already
+ * on it! Blame xterm.)
+ */
+static void swap_screen(Terminal *term, int which, int reset, int keep_cur_pos)
+{
+ int t;
+ tree234 *ttr;
+
+ if (!which)
+ reset = FALSE; /* do no weird resetting if which==0 */
+
+ if (which != term->alt_which) {
+ term->alt_which = which;
+
+ ttr = term->alt_screen;
+ term->alt_screen = term->screen;
+ term->screen = ttr;
+ term->alt_sblines = find_last_nonempty_line(term, term->alt_screen) + 1;
+ t = term->curs.x;
+ if (!reset && !keep_cur_pos)
+ term->curs.x = term->alt_x;
+ term->alt_x = t;
+ t = term->curs.y;
+ if (!reset && !keep_cur_pos)
+ term->curs.y = term->alt_y;
+ term->alt_y = t;
+ t = term->marg_t;
+ if (!reset) term->marg_t = term->alt_t;
+ term->alt_t = t;
+ t = term->marg_b;
+ if (!reset) term->marg_b = term->alt_b;
+ term->alt_b = t;
+ t = term->dec_om;
+ if (!reset) term->dec_om = term->alt_om;
+ term->alt_om = t;
+ t = term->wrap;
+ if (!reset) term->wrap = term->alt_wrap;
+ term->alt_wrap = t;
+ t = term->wrapnext;
+ if (!reset) term->wrapnext = term->alt_wnext;
+ term->alt_wnext = t;
+ t = term->insert;
+ if (!reset) term->insert = term->alt_ins;
+ term->alt_ins = t;
+ t = term->cset;
+ if (!reset) term->cset = term->alt_cset;
+ term->alt_cset = t;
+ t = term->utf;
+ if (!reset) term->utf = term->alt_utf;
+ term->alt_utf = t;
+ t = term->sco_acs;
+ if (!reset) term->sco_acs = term->alt_sco_acs;
+ term->alt_sco_acs = t;
+ }
+
+ if (reset && term->screen) {
+ /*
+ * Yes, this _is_ supposed to honour background-colour-erase.
+ */
+ erase_lots(term, FALSE, TRUE, TRUE);
+ }
+}
+
+/*
+ * Update the scroll bar.
+ */
+static void update_sbar(Terminal *term)
+{
+ int nscroll = sblines(term);
+ set_sbar(term->frontend, nscroll + term->rows,
+ nscroll + term->disptop, term->rows);
+}
+
+/*
+ * Check whether the region bounded by the two pointers intersects
+ * the scroll region, and de-select the on-screen selection if so.
+ */
+static void check_selection(Terminal *term, pos from, pos to)
+{
+ if (poslt(from, term->selend) && poslt(term->selstart, to))
+ deselect(term);
+}
+
+/*
+ * Scroll the screen. (`lines' is +ve for scrolling forward, -ve
+ * for backward.) `sb' is TRUE if the scrolling is permitted to
+ * affect the scrollback buffer.
+ */
+static void scroll(Terminal *term, int topline, int botline, int lines, int sb)
+{
+ termline *line;
+ int i, seltop, 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);
+ resizeline(term, line, term->cols);
+ for (i = 0; i < term->cols; i++)
+ copy_termchar(line, i, &term->erase_char);
+ line->lattr = LATTR_NORM;
+ addpos234(term->screen, line, topline);
+
+ if (term->selstart.y >= topline && term->selstart.y <= botline) {
+ term->selstart.y++;
+ if (term->selstart.y > botline) {
+ term->selstart.y = botline + 1;
+ term->selstart.x = 0;
+ }
+ }
+ if (term->selend.y >= topline && term->selend.y <= botline) {
+ term->selend.y++;
+ if (term->selend.y > botline) {
+ term->selend.y = botline + 1;
+ term->selend.x = 0;
+ }
+ }
+
+ lines++;
+ }
+ } else {
+ while (lines > 0) {
+ line = delpos234(term->screen, topline);
+ cc_check(line); /* XXX-REMOVE-BEFORE-RELEASE */
+ if (sb && term->savelines > 0) {
+ int sblen = count234(term->scrollback);
+ /*
+ * We must add this line to the scrollback. We'll
+ * remove a line from the top of the scrollback if
+ * the scrollback is full.
+ */
+ if (sblen == term->savelines) {
+ unsigned char *cline;
+
+ sblen--;
+ cline = delpos234(term->scrollback, 0);
+ sfree(cline);
+ } else
+ term->tempsblines += 1;
+
+ addpos234(term->scrollback, compressline(line), sblen);
+
+ /* now `line' itself can be reused as the bottom line */
+
+ /*
+ * If the user is currently looking at part of the
+ * scrollback, and they haven't enabled any options
+ * that are going to reset the scrollback as a
+ * result of this movement, then the chances are
+ * they'd like to keep looking at the same line. So
+ * we move their viewpoint at the same rate as the
+ * scroll, at least until their viewpoint hits the
+ * top end of the scrollback buffer, at which point
+ * we don't have the choice any more.
+ *
+ * Thanks to Jan Holmen Holsten for the idea and
+ * initial implementation.
+ */
+ if (term->disptop > -term->savelines && term->disptop < 0)
+ term->disptop--;
+ }
+ resizeline(term, line, term->cols);
+ for (i = 0; i < term->cols; i++)
+ copy_termchar(line, i, &term->erase_char);
+ line->lattr = LATTR_NORM;
+ addpos234(term->screen, line, botline);
+
+ /*
+ * If the selection endpoints move into the scrollback,
+ * we keep them moving until they hit the top. However,
+ * of course, if the line _hasn't_ moved into the
+ * scrollback then we don't do this, and cut them off
+ * at the top of the scroll region.
+ *
+ * This applies to selstart and selend (for an existing
+ * selection), and also selanchor (for one being
+ * selected as we speak).
+ */
+ seltop = sb ? -term->savelines : topline;
+
+ if (term->selstate != NO_SELECTION) {
+ if (term->selstart.y >= seltop &&
+ term->selstart.y <= botline) {
+ term->selstart.y--;
+ if (term->selstart.y < seltop) {
+ term->selstart.y = seltop;
+ term->selstart.x = 0;
+ }
+ }
+ if (term->selend.y >= seltop && term->selend.y <= botline) {
+ term->selend.y--;
+ if (term->selend.y < seltop) {
+ term->selend.y = seltop;
+ term->selend.x = 0;
+ }
+ }
+ if (term->selanchor.y >= seltop &&
+ term->selanchor.y <= botline) {
+ term->selanchor.y--;
+ if (term->selanchor.y < seltop) {
+ term->selanchor.y = seltop;
+ term->selanchor.x = 0;
+ }
+ }
+ }
+
+ 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
+/*
+ * Add a scroll of a region on the screen into the pending scroll list.
+ * `lines' is +ve for scrolling forward, -ve for backward.
+ *
+ * If the scroll is on the same area as the last scroll in the list,
+ * merge them.
+ */
+static void save_scroll(Terminal *term, int topline, int botline, int lines)
+{
+ struct scrollregion *newscroll;
+ if (term->scrolltail &&
+ term->scrolltail->topline == topline &&
+ term->scrolltail->botline == botline) {
+ term->scrolltail->lines += lines;
+ } else {
+ newscroll = snew(struct scrollregion);
+ newscroll->topline = topline;
+ newscroll->botline = botline;
+ newscroll->lines = lines;
+ newscroll->next = NULL;
+
+ if (!term->scrollhead)
+ term->scrollhead = newscroll;
+ else
+ term->scrolltail->next = newscroll;
+ term->scrolltail = newscroll;
+ }
+}
+
+/*
+ * Scroll the physical display, and our conception of it in disptext.
+ */
+static void scroll_display(Terminal *term, int topline, int botline, int lines)
+{
+ int distance, nlines, i, j;
+
+ distance = lines > 0 ? lines : -lines;
+ nlines = botline - topline + 1 - distance;
+ if (lines > 0) {
+ for (i = 0; i < nlines; i++)
+ for (j = 0; j < term->cols; j++)
+ copy_termchar(term->disptext[start+i], j,
+ term->disptext[start+i+distance]->chars+j);
+ if (term->dispcursy >= 0 &&
+ term->dispcursy >= topline + distance &&
+ term->dispcursy < topline + distance + nlines)
+ term->dispcursy -= distance;
+ for (i = 0; i < distance; i++)
+ for (j = 0; j < term->cols; j++)
+ term->disptext[start+nlines+i]->chars[j].attr |= ATTR_INVALID;
+ } else {
+ for (i = nlines; i-- ;)
+ for (j = 0; j < term->cols; j++)
+ copy_termchar(term->disptext[start+i+distance], j,
+ term->disptext[start+i]->chars+j);
+ if (term->dispcursy >= 0 &&
+ term->dispcursy >= topline &&
+ term->dispcursy < topline + nlines)
+ term->dispcursy += distance;
+ for (i = 0; i < distance; i++)
+ for (j = 0; j < term->cols; j++)
+ term->disptext[start+i]->chars[j].attr |= ATTR_INVALID;
+ }
+ save_scroll(term, topline, botline, lines);
+}
+#endif /* OPTIMISE_SCROLL */
+
+/*
+ * Move the cursor to a given position, clipping at boundaries. We
+ * may or may not want to clip at the scroll margin: marg_clip is 0
+ * not to, 1 to disallow _passing_ the margins, and 2 to disallow
+ * even _being_ outside the margins.
+ */
+static void move(Terminal *term, int x, int y, int marg_clip)
+{
+ if (x < 0)
+ x = 0;
+ if (x >= term->cols)
+ x = term->cols - 1;
+ if (marg_clip) {
+ if ((term->curs.y >= term->marg_t || marg_clip == 2) &&
+ y < term->marg_t)
+ y = term->marg_t;
+ if ((term->curs.y <= term->marg_b || marg_clip == 2) &&
+ y > term->marg_b)
+ y = term->marg_b;
+ }
+ if (y < 0)
+ y = 0;
+ if (y >= term->rows)
+ y = term->rows - 1;
+ term->curs.x = x;
+ term->curs.y = y;
+ term->wrapnext = FALSE;
+}
+
+/*
+ * Save or restore the cursor and SGR mode.
+ */
+static void save_cursor(Terminal *term, int save)
+{
+ if (save) {
+ term->savecurs = term->curs;
+ term->save_attr = term->curr_attr;
+ term->save_cset = term->cset;
+ term->save_utf = term->utf;
+ term->save_wnext = term->wrapnext;
+ term->save_csattr = term->cset_attr[term->cset];
+ term->save_sco_acs = term->sco_acs;
+ } else {
+ term->curs = term->savecurs;
+ /* Make sure the window hasn't shrunk since the save */
+ if (term->curs.x >= term->cols)
+ term->curs.x = term->cols - 1;
+ if (term->curs.y >= term->rows)
+ term->curs.y = term->rows - 1;
+
+ term->curr_attr = term->save_attr;
+ term->cset = term->save_cset;
+ term->utf = term->save_utf;
+ term->wrapnext = term->save_wnext;
+ /*
+ * wrapnext might reset to False if the x position is no
+ * longer at the rightmost edge.
+ */
+ if (term->wrapnext && term->curs.x < term->cols-1)
+ term->wrapnext = FALSE;
+ term->cset_attr[term->cset] = term->save_csattr;
+ term->sco_acs = term->save_sco_acs;
+ set_erase_char(term);
+ }
+}
+
+/*
+ * This function is called before doing _anything_ which affects
+ * only part of a line of text. It is used to mark the boundary
+ * between two character positions, and it indicates that some sort
+ * of effect is going to happen on only one side of that boundary.
+ *
+ * The effect of this function is to check whether a CJK
+ * double-width character is straddling the boundary, and to remove
+ * it and replace it with two spaces if so. (Of course, one or
+ * other of those spaces is then likely to be replaced with
+ * something else again, as a result of whatever happens next.)
+ *
+ * Also, if the boundary is at the right-hand _edge_ of the screen,
+ * it implies something deliberate is being done to the rightmost
+ * column position; hence we must clear LATTR_WRAPPED2.
+ *
+ * The input to the function is the coordinates of the _second_
+ * character of the pair.
+ */
+static void check_boundary(Terminal *term, int x, int y)
+{
+ termline *ldata;
+
+ /* Validate input coordinates, just in case. */
+ if (x == 0 || x > term->cols)
+ return;
+
+ ldata = scrlineptr(y);
+ if (x == term->cols) {
+ ldata->lattr &= ~LATTR_WRAPPED2;
+ } else {
+ if (ldata->chars[x].chr == UCSWIDE) {
+ clear_cc(ldata, x-1);
+ clear_cc(ldata, x);
+ ldata->chars[x-1].chr = ' ' | CSET_ASCII;
+ ldata->chars[x] = ldata->chars[x-1];
+ }
+ }
+}
+
+/*
+ * Erase a large portion of the screen: the whole screen, or the
+ * whole line, or parts thereof.
+ */
+static void erase_lots(Terminal *term,
+ int line_only, int from_begin, int to_end)
+{
+ pos start, end;
+ int erase_lattr;
+ int erasing_lines_from_top = 0;
+
+ if (line_only) {
+ start.y = term->curs.y;
+ start.x = 0;
+ end.y = term->curs.y + 1;
+ end.x = 0;
+ erase_lattr = FALSE;
+ } else {
+ start.y = 0;
+ start.x = 0;
+ end.y = term->rows;
+ end.x = 0;
+ erase_lattr = TRUE;
+ }
+ if (!from_begin) {
+ start = term->curs;
+ }
+ if (!to_end) {
+ end = term->curs;
+ incpos(end);
+ }
+ if (!from_begin || !to_end)
+ check_boundary(term, term->curs.x, term->curs.y);
+ check_selection(term, start, end);
+
+ /* Clear screen also forces a full window redraw, just in case. */
+ if (start.y == 0 && start.x == 0 && end.y == term->rows)
+ term_invalidate(term);
+
+ /* Lines scrolled away shouldn't be brought back on if the terminal
+ * resizes. */
+ if (start.y == 0 && start.x == 0 && end.x == 0 && erase_lattr)
+ erasing_lines_from_top = 1;
+
+ if (term->cfg.erase_to_scrollback && erasing_lines_from_top) {
+ /* If it's a whole number of lines, starting at the top, and
+ * we're fully erasing them, erase by scrolling and keep the
+ * lines in the scrollback. */
+ int scrolllines = end.y;
+ if (end.y == term->rows) {
+ /* Shrink until we find a non-empty row.*/
+ scrolllines = find_last_nonempty_line(term, term->screen) + 1;
+ }
+ if (scrolllines > 0)
+ scroll(term, 0, scrolllines - 1, scrolllines, TRUE);
+ } else {
+ termline *ldata = scrlineptr(start.y);
+ while (poslt(start, end)) {
+ if (start.x == term->cols) {
+ if (!erase_lattr)
+ ldata->lattr &= ~(LATTR_WRAPPED | LATTR_WRAPPED2);
+ else
+ ldata->lattr = LATTR_NORM;
+ } else {
+ copy_termchar(ldata, start.x, &term->erase_char);
+ }
+ if (incpos(start) && start.y < term->rows) {
+ ldata = scrlineptr(start.y);
+ }
+ }
+ }
+
+ /* After an erase of lines from the top of the screen, we shouldn't
+ * bring the lines back again if the terminal enlarges (since the user or
+ * application has explictly thrown them away). */
+ if (erasing_lines_from_top && !(term->alt_which))
+ term->tempsblines = 0;
+}
+
+/*
+ * Insert or delete characters within the current line. n is +ve if
+ * insertion is desired, and -ve for deletion.
+ */
+static void insch(Terminal *term, int n)
+{
+ int dir = (n < 0 ? -1 : +1);
+ int m, j;
+ pos cursplus;
+ termline *ldata;
+
+ n = (n < 0 ? -n : n);
+ if (n > term->cols - term->curs.x)
+ n = term->cols - term->curs.x;
+ m = term->cols - term->curs.x - n;
+ 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 = scrlineptr(term->curs.y);
+ if (dir < 0) {
+ for (j = 0; j < m; j++)
+ move_termchar(ldata,
+ ldata->chars + term->curs.x + j,
+ ldata->chars + term->curs.x + j + n);
+ while (n--)
+ copy_termchar(ldata, term->curs.x + m++, &term->erase_char);
+ } else {
+ for (j = m; j-- ;)
+ move_termchar(ldata,
+ ldata->chars + term->curs.x + j + n,
+ ldata->chars + term->curs.x + j);
+ while (n--)
+ copy_termchar(ldata, term->curs.x + n, &term->erase_char);
+ }
+}
+
+/*
+ * Toggle terminal mode `mode' to state `state'. (`query' indicates
+ * whether the mode is a DEC private one or a normal one.)
+ */
+static void toggle_mode(Terminal *term, int mode, int query, int state)
+{
+ if (query)
+ switch (mode) {
+ case 1: /* DECCKM: application cursor keys */
+ term->app_cursor_keys = state;
+ break;
+ case 2: /* DECANM: VT52 mode */
+ term->vt52_mode = !state;
+ if (term->vt52_mode) {
+ term->blink_is_real = FALSE;
+ term->vt52_bold = FALSE;
+ } else {
+ term->blink_is_real = term->cfg.blinktext;
+ }
+ term_schedule_tblink(term);
+ break;
+ case 3: /* DECCOLM: 80/132 columns */
+ deselect(term);
+ if (!term->cfg.no_remote_resize)
+ request_resize(term->frontend, state ? 132 : 80, term->rows);
+ term->reset_132 = state;
+ term->alt_t = term->marg_t = 0;
+ term->alt_b = term->marg_b = term->rows - 1;
+ move(term, 0, 0, 0);
+ erase_lots(term, FALSE, TRUE, TRUE);
+ break;
+ case 5: /* DECSCNM: reverse video */
+ /*
+ * Toggle reverse video. If we receive an OFF within the
+ * visual bell timeout period after an ON, we trigger an
+ * effective visual bell, so that ESC[?5hESC[?5l will
+ * always be an actually _visible_ visual bell.
+ */
+ if (term->rvideo && !state) {
+ /* This is an OFF, so set up a vbell */
+ term_schedule_vbell(term, TRUE, term->rvbell_startpoint);
+ } else if (!term->rvideo && state) {
+ /* This is an ON, so we notice the time and save it. */
+ term->rvbell_startpoint = GETTICKCOUNT();
+ }
+ term->rvideo = state;
+ seen_disp_event(term);
+ break;
+ case 6: /* DECOM: DEC origin mode */
+ term->dec_om = state;
+ break;
+ case 7: /* DECAWM: auto wrap */
+ term->wrap = state;
+ break;
+ case 8: /* DECARM: auto key repeat */
+ term->repeat_off = !state;
+ break;
+ case 10: /* DECEDM: set local edit mode */
+ term->term_editing = state;
+ if (term->ldisc) /* cause ldisc to notice changes */
+ ldisc_send(term->ldisc, NULL, 0, 0);
+ break;
+ case 25: /* DECTCEM: enable/disable cursor */
+ compatibility2(OTHER, VT220);
+ term->cursor_on = state;
+ seen_disp_event(term);
+ break;
+ case 47: /* alternate screen */
+ compatibility(OTHER);
+ deselect(term);
+ swap_screen(term, term->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 */
+ if (!term->cfg.no_alt_screen)
+ save_cursor(term, state);
+ if (!state) seen_disp_event(term);
+ break;
+ case 1049: /* cursor & alternate screen */
+ if (state && !term->cfg.no_alt_screen)
+ save_cursor(term, state);
+ if (!state) seen_disp_event(term);
+ compatibility(OTHER);
+ deselect(term);
+ swap_screen(term, term->cfg.no_alt_screen ? 0 : state, TRUE, FALSE);
+ if (!state && !term->cfg.no_alt_screen)
+ save_cursor(term, state);
+ term->disptop = 0;
+ break;
+ } else
+ switch (mode) {
+ case 4: /* IRM: set insert mode */
+ compatibility(VT102);
+ term->insert = state;
+ break;
+ case 12: /* SRM: set echo mode */
+ term->term_echoing = !state;
+ if (term->ldisc) /* cause ldisc to notice changes */
+ ldisc_send(term->ldisc, NULL, 0, 0);
+ break;
+ case 20: /* LNM: Return sends ... */
+ term->cr_lf_return = state;
+ break;
+ case 34: /* WYULCURM: Make cursor BIG */
+ compatibility2(OTHER, VT220);
+ term->big_cursor = !state;
+ }
+}
+
+/*
+ * Process an OSC sequence: set window title or icon name.
+ */
+static void do_osc(Terminal *term)
+{
+ if (term->osc_w) {
+ while (term->osc_strlen--)
+ term->wordness[(unsigned char)
+ term->osc_string[term->osc_strlen]] = term->esc_args[0];
+ } else {
+ term->osc_string[term->osc_strlen] = '\0';
+ switch (term->esc_args[0]) {
+ case 0:
+ case 1:
+ if (!term->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...
+ */
+static void term_out(Terminal *term)
+{
+ unsigned long c;
+ int unget;
+ unsigned char localbuf[256], *chars;
+ int nchars = 0;
+
+ unget = -1;
+
+ chars = NULL; /* placate compiler warnings */
+ while (nchars > 0 || 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) | CSET_ASCII;
+ break;
+ } else if ((c & 0xe0) == 0xc0) {
+ term->utf_size = term->utf_state = 1;
+ term->utf_char = (c & 0x1f);
+ } else if ((c & 0xf0) == 0xe0) {
+ term->utf_size = term->utf_state = 2;
+ term->utf_char = (c & 0x0f);
+ } else if ((c & 0xf8) == 0xf0) {
+ term->utf_size = term->utf_state = 3;
+ term->utf_char = (c & 0x07);
+ } else if ((c & 0xfc) == 0xf8) {
+ term->utf_size = term->utf_state = 4;
+ term->utf_char = (c & 0x03);
+ } else if ((c & 0xfe) == 0xfc) {
+ term->utf_size = term->utf_state = 5;
+ term->utf_char = (c & 0x01);
+ } else {
+ c = UCSERR;
+ break;
+ }
+ continue;
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ if ((c & 0xC0) != 0x80) {
+ unget = c;
+ c = UCSERR;
+ term->utf_state = 0;
+ break;
+ }
+ term->utf_char = (term->utf_char << 6) | (c & 0x3f);
+ if (--term->utf_state)
+ continue;
+
+ c = term->utf_char;
+
+ /* Is somebody trying to be evil! */
+ if (c < 0x80 ||
+ (c < 0x800 && term->utf_size >= 2) ||
+ (c < 0x10000 && term->utf_size >= 3) ||
+ (c < 0x200000 && term->utf_size >= 4) ||
+ (c < 0x4000000 && term->utf_size >= 5))
+ c = UCSERR;
+
+ /* Unicode line separator and paragraph separator are CR-LF */
+ if (c == 0x2028 || c == 0x2029)
+ c = 0x85;
+
+ /* High controls are probably a Baaad idea too. */
+ if (c < 0xA0)
+ c = 0xFFFD;
+
+ /* The UTF-16 surrogates are not nice either. */
+ /* The standard give the option of decoding these:
+ * I don't want to! */
+ if (c >= 0xD800 && c < 0xE000)
+ c = UCSERR;
+
+ /* ISO 10646 characters now limited to UTF-16 range. */
+ if (c > 0x10FFFF)
+ c = UCSERR;
+
+ /* This is currently a TagPhobic application.. */
+ if (c >= 0xE0000 && c <= 0xE007F)
+ continue;
+
+ /* U+FEFF is best seen as a null. */
+ if (c == 0xFEFF)
+ continue;
+ /* But U+FFFE is an error. */
+ if (c == 0xFFFE || c == 0xFFFF)
+ c = UCSERR;
+
+ break;
+ }
+ /* Are we in the nasty ACS mode? Note: no sco in utf mode. */
+ else if(term->sco_acs &&
+ (c!='\033' && c!='\012' && c!='\015' && c!='\b'))
+ {
+ if (term->sco_acs == 2) c |= 0x80;
+ c |= CSET_SCOACS;
+ } else {
+ switch (term->cset_attr[term->cset]) {
+ /*
+ * Linedraw characters are different from 'ESC ( B'
+ * only for a small range. For ones outside that
+ * range, make sure we use the same font as well as
+ * the same encoding.
+ */
+ case CSET_LINEDRW:
+ if (term->ucsdata->unitab_ctrl[c] != 0xFF)
+ c = term->ucsdata->unitab_ctrl[c];
+ else
+ c = ((unsigned char) c) | CSET_LINEDRW;
+ break;
+
+ case CSET_GBCHR:
+ /* If UK-ASCII, make the '#' a LineDraw Pound */
+ if (c == '#') {
+ c = '}' | CSET_LINEDRW;
+ break;
+ }
+ /*FALLTHROUGH*/ case CSET_ASCII:
+ if (term->ucsdata->unitab_ctrl[c] != 0xFF)
+ c = term->ucsdata->unitab_ctrl[c];
+ else
+ c = ((unsigned char) c) | CSET_ASCII;
+ break;
+ case CSET_SCOACS:
+ if (c>=' ') c = ((unsigned char)c) | CSET_SCOACS;
+ break;
+ }
+ }
+ }
+
+ /* How about C1 controls ? */
+ 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;
+ /* destructive backspace might be disabled */
+ if (!term->cfg.no_dbackspace) {
+ check_boundary(term, term->curs.x, term->curs.y);
+ check_boundary(term, term->curs.x+1, term->curs.y);
+ copy_termchar(scrlineptr(term->curs.y),
+ term->curs.x, &term->erase_char);
+ }
+ } else
+ /* Or normal C0 controls. */
+ if ((c & ~0x1F) == 0 && term->termstate < DO_CTRLS) {
+ switch (c) {
+ case '\005': /* ENQ: terminal type query */
+ /* Strictly speaking this is VT100 but a VT100 defaults to
+ * no response. Other terminals respond at their option.
+ *
+ * Don't put a CR in the default string as this tends to
+ * upset some weird software.
+ *
+ * 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': /* BEL: Bell */
+ {
+ struct beeptime *newbeep;
+ unsigned long ticks;
+
+ ticks = GETTICKCOUNT();
+
+ if (!term->beep_overloaded) {
+ newbeep = snew(struct beeptime);
+ newbeep->ticks = ticks;
+ newbeep->next = NULL;
+ if (!term->beephead)
+ term->beephead = newbeep;
+ else
+ term->beeptail->next = newbeep;
+ term->beeptail = newbeep;
+ term->nbeeps++;
+ }
+
+ /*
+ * Throw out any beeps that happened more than
+ * t seconds ago.
+ */
+ while (term->beephead &&
+ term->beephead->ticks < ticks - term->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_schedule_vbell(term, FALSE, 0);
+ }
+ }
+ seen_disp_event(term);
+ }
+ break;
+ case '\b': /* BS: Back space */
+ if (term->curs.x == 0 &&
+ (term->curs.y == 0 || term->wrap == 0))
+ /* do nothing */ ;
+ else if (term->curs.x == 0 && term->curs.y > 0)
+ term->curs.x = term->cols - 1, term->curs.y--;
+ else if (term->wrapnext)
+ term->wrapnext = FALSE;
+ else
+ term->curs.x--;
+ seen_disp_event(term);
+ break;
+ case '\016': /* LS1: Locking-shift one */
+ compatibility(VT100);
+ term->cset = 1;
+ break;
+ case '\017': /* LS0: Locking-shift zero */
+ compatibility(VT100);
+ term->cset = 0;
+ break;
+ case '\033': /* ESC: Escape */
+ if (term->vt52_mode)
+ term->termstate = VT52_ESC;
+ else {
+ compatibility(ANSIMIN);
+ term->termstate = SEEN_ESC;
+ term->esc_query = FALSE;
+ }
+ break;
+ case '\015': /* CR: Carriage return */
+ term->curs.x = 0;
+ term->wrapnext = FALSE;
+ seen_disp_event(term);
+ term->paste_hold = 0;
+ if (term->logctx)
+ logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
+ break;
+ case '\014': /* FF: Form feed */
+ if (has_compat(SCOANSI)) {
+ move(term, 0, 0, 0);
+ erase_lots(term, FALSE, FALSE, TRUE);
+ term->disptop = 0;
+ term->wrapnext = FALSE;
+ seen_disp_event(term);
+ break;
+ }
+ case '\013': /* VT: Line tabulation */
+ compatibility(VT100);
+ case '\012': /* LF: Line feed */
+ if (term->curs.y == term->marg_b)
+ scroll(term, term->marg_t, term->marg_b, 1, TRUE);
+ else if (term->curs.y < term->rows - 1)
+ term->curs.y++;
+ if (term->cfg.lfhascr)
+ term->curs.x = 0;
+ term->wrapnext = FALSE;
+ seen_disp_event(term);
+ term->paste_hold = 0;
+ if (term->logctx)
+ logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
+ break;
+ case '\t': /* HT: Character tabulation */
+ {
+ pos old_curs = term->curs;
+ termline *ldata = scrlineptr(term->curs.y);
+
+ do {
+ term->curs.x++;
+ } while (term->curs.x < term->cols - 1 &&
+ !term->tabs[term->curs.x]);
+
+ if ((ldata->lattr & LATTR_MODE) != LATTR_NORM) {
+ if (term->curs.x >= term->cols / 2)
+ term->curs.x = term->cols / 2 - 1;
+ } else {
+ if (term->curs.x >= term->cols)
+ term->curs.x = term->cols - 1;
+ }
+
+ check_selection(term, old_curs, term->curs);
+ }
+ seen_disp_event(term);
+ break;
+ }
+ } else
+ switch (term->termstate) {
+ case TOPLEVEL:
+ /* Only graphic characters get this far;
+ * ctrls are stripped above */
+ {
+ termline *cline = scrlineptr(term->curs.y);
+ int width = 0;
+ if (DIRECT_CHAR(c))
+ width = 1;
+ if (!width)
+ width = wcwidth((wchar_t) c);
+
+ if (term->wrapnext && term->wrap && width > 0) {
+ cline->lattr |= LATTR_WRAPPED;
+ if (term->curs.y == term->marg_b)
+ scroll(term, term->marg_t, term->marg_b, 1, TRUE);
+ else if (term->curs.y < term->rows - 1)
+ term->curs.y++;
+ term->curs.x = 0;
+ term->wrapnext = FALSE;
+ cline = scrlineptr(term->curs.y);
+ }
+ if (term->insert && width > 0)
+ insch(term, width);
+ if (term->selstate != NO_SELECTION) {
+ pos cursplus = term->curs;
+ incpos(cursplus);
+ check_selection(term, term->curs, cursplus);
+ }
+ if (((c & CSET_MASK) == CSET_ASCII ||
+ (c & CSET_MASK) == 0) &&
+ term->logctx)
+ logtraffic(term->logctx, (unsigned char) c,
+ LGTYP_ASCII);
+
+ switch (width) {
+ case 2:
+ /*
+ * If we're about to display a double-width
+ * character starting in the rightmost
+ * column, then we do something special
+ * instead. We must print a space in the
+ * last column of the screen, then wrap;
+ * and we also set LATTR_WRAPPED2 which
+ * instructs subsequent cut-and-pasting not
+ * only to splice this line to the one
+ * after it, but to ignore the space in the
+ * last character position as well.
+ * (Because what was actually output to the
+ * terminal was presumably just a sequence
+ * of CJK characters, and we don't want a
+ * space to be pasted in the middle of
+ * those just because they had the
+ * misfortune to start in the wrong parity
+ * column. xterm concurs.)
+ */
+ check_boundary(term, term->curs.x, term->curs.y);
+ check_boundary(term, term->curs.x+2, term->curs.y);
+ if (term->curs.x == term->cols-1) {
+ copy_termchar(cline, term->curs.x,
+ &term->erase_char);
+ cline->lattr |= LATTR_WRAPPED | LATTR_WRAPPED2;
+ if (term->curs.y == term->marg_b)
+ scroll(term, term->marg_t, term->marg_b,
+ 1, TRUE);
+ else if (term->curs.y < term->rows - 1)
+ term->curs.y++;
+ term->curs.x = 0;
+ cline = scrlineptr(term->curs.y);
+ /* Now we must check_boundary again, of course. */
+ check_boundary(term, term->curs.x, term->curs.y);
+ check_boundary(term, term->curs.x+2, term->curs.y);
+ }
+
+ /* FULL-TERMCHAR */
+ clear_cc(cline, term->curs.x);
+ cline->chars[term->curs.x].chr = c;
+ cline->chars[term->curs.x].attr = term->curr_attr;
+
+ term->curs.x++;
+
+ /* FULL-TERMCHAR */
+ clear_cc(cline, term->curs.x);
+ cline->chars[term->curs.x].chr = UCSWIDE;
+ cline->chars[term->curs.x].attr = term->curr_attr;
+
+ break;
+ case 1:
+ check_boundary(term, term->curs.x, term->curs.y);
+ check_boundary(term, term->curs.x+1, term->curs.y);
+
+ /* FULL-TERMCHAR */
+ clear_cc(cline, term->curs.x);
+ cline->chars[term->curs.x].chr = c;
+ cline->chars[term->curs.x].attr = term->curr_attr;
+
+ break;
+ case 0:
+ if (term->curs.x > 0) {
+ int x = term->curs.x - 1;
+
+ /* If we're in wrapnext state, the character
+ * to combine with is _here_, not to our left. */
+ if (term->wrapnext)
+ x++;
+
+ /*
+ * If the previous character is
+ * UCSWIDE, back up another one.
+ */
+ if (cline->chars[x].chr == UCSWIDE) {
+ assert(x > 0);
+ x--;
+ }
+
+ add_cc(cline, x, c);
+ seen_disp_event(term);
+ }
+ continue;
+ default:
+ continue;
+ }
+ term->curs.x++;
+ if (term->curs.x == term->cols) {
+ term->curs.x--;
+ term->wrapnext = TRUE;
+ if (term->wrap && term->vt52_mode) {
+ cline->lattr |= LATTR_WRAPPED;
+ if (term->curs.y == term->marg_b)
+ scroll(term, term->marg_t, term->marg_b, 1, TRUE);
+ else if (term->curs.y < term->rows - 1)
+ term->curs.y++;
+ term->curs.x = 0;
+ term->wrapnext = FALSE;
+ }
+ }
+ seen_disp_event(term);
+ }
+ break;
+
+ case OSC_MAYBE_ST:
+ /*
+ * This state is virtually identical to SEEN_ESC, with the
+ * exception that we have an OSC sequence in the pipeline,
+ * and _if_ we see a backslash, we process it.
+ */
+ if (c == '\\') {
+ do_osc(term);
+ term->termstate = TOPLEVEL;
+ break;
+ }
+ /* else fall through */
+ case SEEN_ESC:
+ if (c >= ' ' && c <= '/') {
+ if (term->esc_query)
+ term->esc_query = -1;
+ else
+ term->esc_query = c;
+ break;
+ }
+ term->termstate = TOPLEVEL;
+ switch (ANSI(c, term->esc_query)) {
+ case '[': /* enter CSI mode */
+ term->termstate = SEEN_CSI;
+ term->esc_nargs = 1;
+ term->esc_args[0] = ARG_DEFAULT;
+ term->esc_query = FALSE;
+ break;
+ case ']': /* OSC: xterm escape sequences */
+ /* Compatibility is nasty here, xterm, linux, decterm yuk! */
+ compatibility(OTHER);
+ term->termstate = SEEN_OSC;
+ term->esc_args[0] = 0;
+ break;
+ case '7': /* DECSC: save cursor */
+ compatibility(VT100);
+ save_cursor(term, TRUE);
+ break;
+ case '8': /* DECRC: restore cursor */
+ compatibility(VT100);
+ save_cursor(term, FALSE);
+ seen_disp_event(term);
+ break;
+ case '=': /* DECKPAM: Keypad application mode */
+ compatibility(VT100);
+ term->app_keypad_keys = TRUE;
+ break;
+ case '>': /* DECKPNM: Keypad numeric mode */
+ compatibility(VT100);
+ term->app_keypad_keys = FALSE;
+ break;
+ case 'D': /* IND: exactly equivalent to LF */
+ compatibility(VT100);
+ if (term->curs.y == term->marg_b)
+ scroll(term, term->marg_t, term->marg_b, 1, TRUE);
+ else if (term->curs.y < term->rows - 1)
+ term->curs.y++;
+ term->wrapnext = FALSE;
+ seen_disp_event(term);
+ break;
+ case 'E': /* NEL: exactly equivalent to CR-LF */
+ compatibility(VT100);
+ term->curs.x = 0;
+ if (term->curs.y == term->marg_b)
+ scroll(term, term->marg_t, term->marg_b, 1, TRUE);
+ else if (term->curs.y < term->rows - 1)
+ term->curs.y++;
+ term->wrapnext = FALSE;
+ seen_disp_event(term);
+ break;
+ case 'M': /* RI: reverse index - backwards LF */
+ compatibility(VT100);
+ if (term->curs.y == term->marg_t)
+ scroll(term, term->marg_t, term->marg_b, -1, TRUE);
+ else if (term->curs.y > 0)
+ term->curs.y--;
+ term->wrapnext = FALSE;
+ seen_disp_event(term);
+ break;
+ case 'Z': /* DECID: terminal type query */
+ compatibility(VT100);
+ if (term->ldisc)
+ ldisc_send(term->ldisc, term->id_string,
+ strlen(term->id_string), 0);
+ break;
+ case 'c': /* RIS: restore power-on settings */
+ compatibility(VT100);
+ power_on(term);
+ 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;
+ }
+ term->disptop = 0;
+ seen_disp_event(term);
+ break;
+ case 'H': /* HTS: set a tab */
+ compatibility(VT100);
+ term->tabs[term->curs.x] = TRUE;
+ break;
+
+ case ANSI('8', '#'): /* DECALN: fills screen with Es :-) */
+ compatibility(VT100);
+ {
+ termline *ldata;
+ int i, j;
+ pos scrtop, scrbot;
+
+ for (i = 0; i < term->rows; i++) {
+ ldata = scrlineptr(i);
+ for (j = 0; j < term->cols; j++) {
+ copy_termchar(ldata, j,
+ &term->basic_erase_char);
+ ldata->chars[j].chr = 'E';
+ }
+ ldata->lattr = LATTR_NORM;
+ }
+ term->disptop = 0;
+ seen_disp_event(term);
+ scrtop.x = scrtop.y = 0;
+ scrbot.x = 0;
+ scrbot.y = term->rows;
+ check_selection(term, scrtop, scrbot);
+ }
+ break;
+
+ case ANSI('3', '#'):
+ case ANSI('4', '#'):
+ case ANSI('5', '#'):
+ case ANSI('6', '#'):
+ compatibility(VT100);
+ {
+ int nlattr;
+
+ switch (ANSI(c, term->esc_query)) {
+ case ANSI('3', '#'): /* DECDHL: 2*height, top */
+ nlattr = LATTR_TOP;
+ break;
+ case ANSI('4', '#'): /* DECDHL: 2*height, bottom */
+ nlattr = LATTR_BOT;
+ break;
+ case ANSI('5', '#'): /* DECSWL: normal */
+ nlattr = LATTR_NORM;
+ break;
+ default: /* case ANSI('6', '#'): DECDWL: 2*width */
+ nlattr = LATTR_WIDE;
+ break;
+ }
+ scrlineptr(term->curs.y)->lattr = nlattr;
+ }
+ break;
+ /* GZD4: G0 designate 94-set */
+ case ANSI('A', '('):
+ compatibility(VT100);
+ if (!term->cfg.no_remote_charset)
+ term->cset_attr[0] = CSET_GBCHR;
+ break;
+ case ANSI('B', '('):
+ compatibility(VT100);
+ if (!term->cfg.no_remote_charset)
+ term->cset_attr[0] = CSET_ASCII;
+ break;
+ case ANSI('0', '('):
+ compatibility(VT100);
+ if (!term->cfg.no_remote_charset)
+ term->cset_attr[0] = CSET_LINEDRW;
+ break;
+ case ANSI('U', '('):
+ compatibility(OTHER);
+ if (!term->cfg.no_remote_charset)
+ term->cset_attr[0] = CSET_SCOACS;
+ break;
+ /* G1D4: G1-designate 94-set */
+ case ANSI('A', ')'):
+ compatibility(VT100);
+ if (!term->cfg.no_remote_charset)
+ term->cset_attr[1] = CSET_GBCHR;
+ break;
+ case ANSI('B', ')'):
+ compatibility(VT100);
+ if (!term->cfg.no_remote_charset)
+ term->cset_attr[1] = CSET_ASCII;
+ break;
+ case ANSI('0', ')'):
+ compatibility(VT100);
+ if (!term->cfg.no_remote_charset)
+ term->cset_attr[1] = CSET_LINEDRW;
+ break;
+ case ANSI('U', ')'):
+ compatibility(OTHER);
+ if (!term->cfg.no_remote_charset)
+ term->cset_attr[1] = CSET_SCOACS;
+ break;
+ /* DOCS: Designate other coding system */
+ case ANSI('8', '%'): /* Old Linux code */
+ case ANSI('G', '%'):
+ compatibility(OTHER);
+ if (!term->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': /* CUU: move up N lines */
+ move(term, term->curs.x,
+ term->curs.y - def(term->esc_args[0], 1), 1);
+ seen_disp_event(term);
+ break;
+ case 'e': /* VPR: move down N lines */
+ compatibility(ANSI);
+ /* FALLTHROUGH */
+ case 'B': /* CUD: Cursor down */
+ move(term, term->curs.x,
+ term->curs.y + def(term->esc_args[0], 1), 1);
+ seen_disp_event(term);
+ break;
+ case ANSI('c', '>'): /* DA: report xterm version */
+ compatibility(OTHER);
+ /* this reports xterm version 136 so that VIM can
+ use the drag messages from the mouse reporting */
+ if (term->ldisc)
+ ldisc_send(term->ldisc, "\033[>0;136;0c", 11, 0);
+ break;
+ case 'a': /* HPR: move right N cols */
+ compatibility(ANSI);
+ /* FALLTHROUGH */
+ case 'C': /* CUF: Cursor right */
+ move(term, term->curs.x + def(term->esc_args[0], 1),
+ term->curs.y, 1);
+ seen_disp_event(term);
+ break;
+ case 'D': /* CUB: move left N cols */
+ move(term, term->curs.x - def(term->esc_args[0], 1),
+ term->curs.y, 1);
+ seen_disp_event(term);
+ break;
+ case 'E': /* CNL: move down N lines and CR */
+ compatibility(ANSI);
+ move(term, 0,
+ term->curs.y + def(term->esc_args[0], 1), 1);
+ seen_disp_event(term);
+ break;
+ case 'F': /* CPL: move up N lines and CR */
+ compatibility(ANSI);
+ move(term, 0,
+ term->curs.y - def(term->esc_args[0], 1), 1);
+ seen_disp_event(term);
+ break;
+ case 'G': /* CHA */
+ case '`': /* HPA: set horizontal posn */
+ compatibility(ANSI);
+ move(term, def(term->esc_args[0], 1) - 1,
+ term->curs.y, 0);
+ seen_disp_event(term);
+ break;
+ case 'd': /* VPA: set vertical posn */
+ compatibility(ANSI);
+ move(term, term->curs.x,
+ ((term->dec_om ? term->marg_t : 0) +
+ def(term->esc_args[0], 1) - 1),
+ (term->dec_om ? 2 : 0));
+ seen_disp_event(term);
+ break;
+ case 'H': /* CUP */
+ case 'f': /* HVP: set horz and vert posns at once */
+ if (term->esc_nargs < 2)
+ term->esc_args[1] = ARG_DEFAULT;
+ move(term, def(term->esc_args[1], 1) - 1,
+ ((term->dec_om ? term->marg_t : 0) +
+ def(term->esc_args[0], 1) - 1),
+ (term->dec_om ? 2 : 0));
+ seen_disp_event(term);
+ break;
+ case 'J': /* ED: erase screen or parts of it */
+ {
+ unsigned int i = def(term->esc_args[0], 0) + 1;
+ if (i > 3)
+ i = 0;
+ erase_lots(term, FALSE, !!(i & 2), !!(i & 1));
+ }
+ term->disptop = 0;
+ seen_disp_event(term);
+ break;
+ case 'K': /* EL: erase line or parts of it */
+ {
+ unsigned int i = def(term->esc_args[0], 0) + 1;
+ if (i > 3)
+ i = 0;
+ erase_lots(term, TRUE, !!(i & 2), !!(i & 1));
+ }
+ seen_disp_event(term);
+ break;
+ case 'L': /* IL: insert lines */
+ compatibility(VT102);
+ if (term->curs.y <= term->marg_b)
+ scroll(term, term->curs.y, term->marg_b,
+ -def(term->esc_args[0], 1), FALSE);
+ seen_disp_event(term);
+ break;
+ case 'M': /* DL: delete lines */
+ compatibility(VT102);
+ if (term->curs.y <= term->marg_b)
+ scroll(term, term->curs.y, term->marg_b,
+ def(term->esc_args[0], 1),
+ TRUE);
+ seen_disp_event(term);
+ break;
+ case '@': /* ICH: insert chars */
+ /* XXX VTTEST says this is vt220, vt510 manual says vt102 */
+ compatibility(VT102);
+ insch(term, def(term->esc_args[0], 1));
+ seen_disp_event(term);
+ break;
+ case 'P': /* DCH: delete chars */
+ compatibility(VT102);
+ insch(term, -def(term->esc_args[0], 1));
+ seen_disp_event(term);
+ break;
+ case 'c': /* DA: terminal type query */
+ compatibility(VT100);
+ /* This is the response for a VT102 */
+ if (term->ldisc)
+ ldisc_send(term->ldisc, term->id_string,
+ strlen(term->id_string), 0);
+ break;
+ case 'n': /* DSR: cursor position query */
+ if (term->ldisc) {
+ if (term->esc_args[0] == 6) {
+ char buf[32];
+ sprintf(buf, "\033[%d;%dR", term->curs.y + 1,
+ term->curs.x + 1);
+ ldisc_send(term->ldisc, buf, strlen(buf), 0);
+ } else if (term->esc_args[0] == 5) {
+ ldisc_send(term->ldisc, "\033[0n", 4, 0);
+ }
+ }
+ break;
+ case 'h': /* SM: toggle modes to high */
+ case ANSI_QUE('h'):
+ compatibility(VT100);
+ {
+ int i;
+ for (i = 0; i < term->esc_nargs; i++)
+ toggle_mode(term, term->esc_args[i],
+ term->esc_query, TRUE);
+ }
+ break;
+ case 'i': /* MC: Media copy */
+ case ANSI_QUE('i'):
+ compatibility(VT100);
+ {
+ 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': /* RM: toggle modes to low */
+ case ANSI_QUE('l'):
+ compatibility(VT100);
+ {
+ int i;
+ for (i = 0; i < term->esc_nargs; i++)
+ toggle_mode(term, term->esc_args[i],
+ term->esc_query, FALSE);
+ }
+ break;
+ case 'g': /* TBC: clear tabs */
+ compatibility(VT100);
+ if (term->esc_nargs == 1) {
+ if (term->esc_args[0] == 0) {
+ term->tabs[term->curs.x] = FALSE;
+ } else if (term->esc_args[0] == 3) {
+ int i;
+ for (i = 0; i < term->cols; i++)
+ term->tabs[i] = FALSE;
+ }
+ }
+ break;
+ case 'r': /* DECSTBM: set scroll margins */
+ compatibility(VT100);
+ if (term->esc_nargs <= 2) {
+ int top, bot;
+ top = def(term->esc_args[0], 1) - 1;
+ bot = (term->esc_nargs <= 1
+ || term->esc_args[1] == 0 ?
+ term->rows :
+ def(term->esc_args[1], term->rows)) - 1;
+ if (bot >= term->rows)
+ bot = term->rows - 1;
+ /* VTTEST Bug 9 - if region is less than 2 lines
+ * don't change region.
+ */
+ if (bot - top > 0) {
+ term->marg_t = top;
+ term->marg_b = bot;
+ term->curs.x = 0;
+ /*
+ * I used to think the cursor should be
+ * placed at the top of the newly marginned
+ * area. Apparently not: VMS TPU falls over
+ * if so.
+ *
+ * Well actually it should for
+ * Origin mode - RDB
+ */
+ term->curs.y = (term->dec_om ?
+ term->marg_t : 0);
+ seen_disp_event(term);
+ }
+ }
+ break;
+ case 'm': /* SGR: set graphics rendition */
+ {
+ /*
+ * A VT100 without the AVO only had one
+ * attribute, either underline or
+ * reverse video depending on the
+ * cursor type, this was selected by
+ * CSI 7m.
+ *
+ * case 2:
+ * This is sometimes DIM, eg on the
+ * GIGI and Linux
+ * case 8:
+ * This is sometimes INVIS various ANSI.
+ * case 21:
+ * This like 22 disables BOLD, DIM and INVIS
+ *
+ * The ANSI colours appear on any
+ * terminal that has colour (obviously)
+ * but the interaction between sgr0 and
+ * the colours varies but is usually
+ * related to the background colour
+ * erase item. The interaction between
+ * colour attributes and the mono ones
+ * is also very implementation
+ * dependent.
+ *
+ * The 39 and 49 attributes are likely
+ * to be unimplemented.
+ */
+ int i;
+ for (i = 0; i < term->esc_nargs; i++) {
+ switch (def(term->esc_args[i], 0)) {
+ case 0: /* restore defaults */
+ term->curr_attr = term->default_attr;
+ break;
+ case 1: /* enable bold */
+ compatibility(VT100AVO);
+ term->curr_attr |= ATTR_BOLD;
+ break;
+ case 21: /* (enable double underline) */
+ compatibility(OTHER);
+ case 4: /* enable underline */
+ compatibility(VT100AVO);
+ term->curr_attr |= ATTR_UNDER;
+ break;
+ case 5: /* enable blink */
+ compatibility(VT100AVO);
+ term->curr_attr |= ATTR_BLINK;
+ break;
+ case 6: /* SCO light bkgrd */
+ compatibility(SCOANSI);
+ term->blink_is_real = FALSE;
+ term->curr_attr |= ATTR_BLINK;
+ term_schedule_tblink(term);
+ break;
+ case 7: /* enable reverse video */
+ term->curr_attr |= ATTR_REVERSE;
+ break;
+ case 10: /* SCO acs off */
+ compatibility(SCOANSI);
+ if (term->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 90:
+ case 91:
+ case 92:
+ case 93:
+ case 94:
+ case 95:
+ case 96:
+ case 97:
+ /* xterm-style bright foreground */
+ term->curr_attr &= ~ATTR_FGMASK;
+ term->curr_attr |=
+ ((term->esc_args[i] - 90 + 8)
+ << ATTR_FGSHIFT);
+ break;
+ case 39: /* default-foreground */
+ term->curr_attr &= ~ATTR_FGMASK;
+ term->curr_attr |= ATTR_DEFFG;
+ break;
+ case 40:
+ case 41:
+ case 42:
+ case 43:
+ case 44:
+ case 45:
+ case 46:
+ case 47:
+ /* background */
+ term->curr_attr &= ~ATTR_BGMASK;
+ term->curr_attr |=
+ (term->esc_args[i] - 40)<<ATTR_BGSHIFT;
+ break;
+ case 100:
+ case 101:
+ case 102:
+ case 103:
+ case 104:
+ case 105:
+ case 106:
+ case 107:
+ /* xterm-style bright background */
+ term->curr_attr &= ~ATTR_BGMASK;
+ term->curr_attr |=
+ ((term->esc_args[i] - 100 + 8)
+ << ATTR_BGSHIFT);
+ break;
+ case 49: /* default-background */
+ term->curr_attr &= ~ATTR_BGMASK;
+ term->curr_attr |= ATTR_DEFBG;
+ break;
+ case 38: /* xterm 256-colour mode */
+ if (i+2 < term->esc_nargs &&
+ term->esc_args[i+1] == 5) {
+ term->curr_attr &= ~ATTR_FGMASK;
+ term->curr_attr |=
+ ((term->esc_args[i+2] & 0xFF)
+ << ATTR_FGSHIFT);
+ i += 2;
+ }
+ break;
+ case 48: /* xterm 256-colour mode */
+ if (i+2 < term->esc_nargs &&
+ term->esc_args[i+1] == 5) {
+ term->curr_attr &= ~ATTR_BGMASK;
+ term->curr_attr |=
+ ((term->esc_args[i+2] & 0xFF)
+ << ATTR_BGSHIFT);
+ i += 2;
+ }
+ break;
+ }
+ }
+ set_erase_char(term);
+ }
+ break;
+ case 's': /* save cursor */
+ save_cursor(term, TRUE);
+ break;
+ case 'u': /* restore cursor */
+ save_cursor(term, FALSE);
+ seen_disp_event(term);
+ break;
+ case 't': /* DECSLPP: set page size - ie window height */
+ /*
+ * VT340/VT420 sequence DECSLPP, DEC only allows values
+ * 24/25/36/48/72/144 other emulators (eg dtterm) use
+ * illegal values (eg first arg 1..9) for window changing
+ * and reports.
+ */
+ if (term->esc_nargs <= 1
+ && (term->esc_args[0] < 1 ||
+ term->esc_args[0] >= 24)) {
+ compatibility(VT340TEXT);
+ if (!term->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 &&
+ !term->cfg.no_remote_qtitle) {
+ 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 &&
+ !term->cfg.no_remote_qtitle) {
+ 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': /* SU: Scroll up */
+ compatibility(SCOANSI);
+ scroll(term, term->marg_t, term->marg_b,
+ def(term->esc_args[0], 1), TRUE);
+ term->wrapnext = FALSE;
+ seen_disp_event(term);
+ break;
+ case 'T': /* SD: Scroll down */
+ compatibility(SCOANSI);
+ scroll(term, term->marg_t, term->marg_b,
+ -def(term->esc_args[0], 1), TRUE);
+ term->wrapnext = FALSE;
+ seen_disp_event(term);
+ break;
+ case ANSI('|', '*'): /* DECSNLS */
+ /*
+ * Set number of lines on screen
+ * VT420 uses VGA like hardware and can
+ * support any size in reasonable range
+ * (24..49 AIUI) with no default specified.
+ */
+ compatibility(VT420);
+ if (term->esc_nargs == 1 && term->esc_args[0] > 0) {
+ if (!term->cfg.no_remote_resize)
+ request_resize(term->frontend, term->cols,
+ def(term->esc_args[0],
+ term->cfg.height));
+ deselect(term);
+ }
+ break;
+ case ANSI('|', '$'): /* DECSCPP */
+ /*
+ * Set number of columns per page
+ * Docs imply range is only 80 or 132, but
+ * I'll allow any.
+ */
+ compatibility(VT340TEXT);
+ if (term->esc_nargs <= 1) {
+ if (!term->cfg.no_remote_resize)
+ request_resize(term->frontend,
+ def(term->esc_args[0],
+ term->cfg.width), term->rows);
+ deselect(term);
+ }
+ break;
+ case 'X': /* ECH: write N spaces w/o moving cursor */
+ /* XXX VTTEST says this is vt220, vt510 manual
+ * says vt100 */
+ compatibility(ANSIMIN);
+ {
+ int n = def(term->esc_args[0], 1);
+ pos cursplus;
+ int p = term->curs.x;
+ termline *cline = scrlineptr(term->curs.y);
+
+ if (n > term->cols - term->curs.x)
+ n = term->cols - term->curs.x;
+ cursplus = term->curs;
+ cursplus.x += n;
+ check_boundary(term, term->curs.x, term->curs.y);
+ check_boundary(term, term->curs.x+n, term->curs.y);
+ check_selection(term, term->curs, cursplus);
+ while (n--)
+ copy_termchar(cline, p++,
+ &term->erase_char);
+ seen_disp_event(term);
+ }
+ break;
+ case 'x': /* DECREQTPARM: report terminal characteristics */
+ compatibility(VT100);
+ if (term->ldisc) {
+ char buf[32];
+ int i = def(term->esc_args[0], 0);
+ if (i == 0 || i == 1) {
+ strcpy(buf, "\033[2;1;1;112;112;1;0x");
+ buf[2] += i;
+ ldisc_send(term->ldisc, buf, 20, 0);
+ }
+ }
+ break;
+ case 'Z': /* CBT: 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]);
+ }
+ check_selection(term, old_curs, term->curs);
+ }
+ break;
+ case ANSI('c', '='): /* Hide or Show Cursor */
+ compatibility(SCOANSI);
+ switch(term->esc_args[0]) {
+ case 0: /* hide cursor */
+ term->cursor_on = FALSE;
+ break;
+ case 1: /* restore cursor */
+ term->big_cursor = FALSE;
+ term->cursor_on = TRUE;
+ break;
+ case 2: /* block cursor */
+ term->big_cursor = TRUE;
+ term->cursor_on = TRUE;
+ break;
+ }
+ break;
+ case ANSI('C', '='):
+ /*
+ * set cursor start on scanline esc_args[0] and
+ * end on scanline esc_args[1].If you set
+ * the bottom scan line to a value less than
+ * the top scan line, the cursor will disappear.
+ */
+ compatibility(SCOANSI);
+ if (term->esc_nargs >= 2) {
+ if (term->esc_args[0] > term->esc_args[1])
+ term->cursor_on = FALSE;
+ else
+ term->cursor_on = TRUE;
+ }
+ break;
+ case ANSI('D', '='):
+ compatibility(SCOANSI);
+ term->blink_is_real = FALSE;
+ term_schedule_tblink(term);
+ if (term->esc_args[0]>=1)
+ term->curr_attr |= ATTR_BLINK;
+ else
+ term->curr_attr &= ~ATTR_BLINK;
+ break;
+ case ANSI('E', '='):
+ compatibility(SCOANSI);
+ term->blink_is_real = (term->esc_args[0] >= 1);
+ term_schedule_tblink(term);
+ break;
+ case ANSI('F', '='): /* set normal foreground */
+ compatibility(SCOANSI);
+ if (term->esc_args[0] >= 0 && term->esc_args[0] < 16) {
+ long colour =
+ (sco2ansicolour[term->esc_args[0] & 0x7] |
+ (term->esc_args[0] & 0x8)) <<
+ ATTR_FGSHIFT;
+ term->curr_attr &= ~ATTR_FGMASK;
+ term->curr_attr |= colour;
+ term->default_attr &= ~ATTR_FGMASK;
+ term->default_attr |= colour;
+ }
+ break;
+ case ANSI('G', '='): /* set normal background */
+ compatibility(SCOANSI);
+ if (term->esc_args[0] >= 0 && term->esc_args[0] < 16) {
+ long colour =
+ (sco2ansicolour[term->esc_args[0] & 0x7] |
+ (term->esc_args[0] & 0x8)) <<
+ ATTR_BGSHIFT;
+ term->curr_attr &= ~ATTR_BGMASK;
+ term->curr_attr |= colour;
+ term->default_attr &= ~ATTR_BGMASK;
+ term->default_attr |= colour;
+ }
+ break;
+ case ANSI('L', '='):
+ compatibility(SCOANSI);
+ term->use_bce = (term->esc_args[0] <= 0);
+ set_erase_char(term);
+ break;
+ case ANSI('p', '"'): /* DECSCL: set compat level */
+ /*
+ * Allow the host to make this emulator a
+ * 'perfect' VT102. This first appeared in
+ * the VT220, but we do need to get back to
+ * PuTTY mode so I won't check it.
+ *
+ * The arg in 40..42,50 are a PuTTY extension.
+ * The 2nd arg, 8bit vs 7bit is not checked.
+ *
+ * Setting VT102 mode should also change
+ * the Fkeys to generate PF* codes as a
+ * real VT102 has no Fkeys. The VT220 does
+ * this, F11..F13 become ESC,BS,LF other
+ * Fkeys send nothing.
+ *
+ * Note ESC c will NOT change this!
+ */
+
+ switch (term->esc_args[0]) {
+ case 61:
+ term->compatibility_level &= ~TM_VTXXX;
+ term->compatibility_level |= TM_VT102;
+ break;
+ case 62:
+ term->compatibility_level &= ~TM_VTXXX;
+ term->compatibility_level |= TM_VT220;
+ break;
+
+ default:
+ if (term->esc_args[0] > 60 &&
+ term->esc_args[0] < 70)
+ term->compatibility_level |= TM_VTXXX;
+ break;
+
+ case 40:
+ term->compatibility_level &= TM_VTXXX;
+ break;
+ case 41:
+ term->compatibility_level = TM_PUTTY;
+ break;
+ case 42:
+ term->compatibility_level = TM_SCOANSI;
+ break;
+
+ case ARG_DEFAULT:
+ term->compatibility_level = TM_PUTTY;
+ break;
+ case 50:
+ break;
+ }
+
+ /* Change the response to CSI c */
+ if (term->esc_args[0] == 50) {
+ int i;
+ char lbuf[64];
+ strcpy(term->id_string, "\033[?");
+ for (i = 1; i < term->esc_nargs; i++) {
+ if (i != 1)
+ strcat(term->id_string, ";");
+ sprintf(lbuf, "%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++] = (char)c;
+ break;
+ case SEEN_OSC_P:
+ {
+ int max = (term->osc_strlen == 0 ? 21 : 16);
+ int val;
+ if ((int)c >= '0' && (int)c <= '9')
+ val = c - '0';
+ else if ((int)c >= 'A' && (int)c <= 'A' + max - 10)
+ val = c - 'A' + 10;
+ else if ((int)c >= 'a' && (int)c <= 'a' + max - 10)
+ val = c - 'a' + 10;
+ else {
+ term->termstate = TOPLEVEL;
+ break;
+ }
+ term->osc_string[term->osc_strlen++] = val;
+ if (term->osc_strlen >= 7) {
+ palette_set(term->frontend, term->osc_string[0],
+ term->osc_string[1] * 16 + term->osc_string[2],
+ term->osc_string[3] * 16 + term->osc_string[4],
+ term->osc_string[5] * 16 + term->osc_string[6]);
+ term_invalidate(term);
+ term->termstate = TOPLEVEL;
+ }
+ }
+ break;
+ case SEEN_OSC_W:
+ switch (c) {
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ 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;
+ seen_disp_event(term);
+ switch (c) {
+ case 'A':
+ move(term, term->curs.x, term->curs.y - 1, 1);
+ break;
+ case 'B':
+ move(term, term->curs.x, term->curs.y + 1, 1);
+ break;
+ case 'C':
+ move(term, term->curs.x + 1, term->curs.y, 1);
+ break;
+ case 'D':
+ move(term, term->curs.x - 1, term->curs.y, 1);
+ break;
+ /*
+ * From the VT100 Manual
+ * NOTE: The special graphics characters in the VT100
+ * are different from those in the VT52
+ *
+ * From VT102 manual:
+ * 137 _ Blank - Same
+ * 140 ` Reserved - Humm.
+ * 141 a Solid rectangle - Similar
+ * 142 b 1/ - Top half of fraction for the
+ * 143 c 3/ - subscript numbers below.
+ * 144 d 5/
+ * 145 e 7/
+ * 146 f Degrees - Same
+ * 147 g Plus or minus - Same
+ * 150 h Right arrow
+ * 151 i Ellipsis (dots)
+ * 152 j Divide by
+ * 153 k Down arrow
+ * 154 l Bar at scan 0
+ * 155 m Bar at scan 1
+ * 156 n Bar at scan 2
+ * 157 o Bar at scan 3 - Similar
+ * 160 p Bar at scan 4 - Similar
+ * 161 q Bar at scan 5 - Similar
+ * 162 r Bar at scan 6 - Same
+ * 163 s Bar at scan 7 - Similar
+ * 164 t Subscript 0
+ * 165 u Subscript 1
+ * 166 v Subscript 2
+ * 167 w Subscript 3
+ * 170 x Subscript 4
+ * 171 y Subscript 5
+ * 172 z Subscript 6
+ * 173 { Subscript 7
+ * 174 | Subscript 8
+ * 175 } Subscript 9
+ * 176 ~ Paragraph
+ *
+ */
+ case 'F':
+ term->cset_attr[term->cset = 0] = CSET_LINEDRW;
+ break;
+ case 'G':
+ term->cset_attr[term->cset = 0] = CSET_ASCII;
+ break;
+ case 'H':
+ move(term, 0, 0, 0);
+ break;
+ case 'I':
+ if (term->curs.y == 0)
+ scroll(term, 0, term->rows - 1, -1, TRUE);
+ else if (term->curs.y > 0)
+ term->curs.y--;
+ term->wrapnext = FALSE;
+ break;
+ case 'J':
+ erase_lots(term, FALSE, FALSE, TRUE);
+ 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;
+ term_schedule_tblink(term);
+ break;
+#if 0
+ case '^':
+ /* XXX Enter auto print mode */
+ break;
+ case '_':
+ /* XXX Exit auto print mode */
+ break;
+ case ']':
+ /* XXX Print screen */
+ break;
+#endif
+
+#ifdef VT52_PLUS
+ case 'E':
+ /* compatibility(ATARI) */
+ move(term, 0, 0, 0);
+ erase_lots(term, FALSE, FALSE, TRUE);
+ 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;
+ 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;
+ set_erase_char(term);
+ break;
+ case 'S':
+ /* compatibility(VI50) */
+ term->curr_attr |= ATTR_UNDER;
+ break;
+ case 'W':
+ /* compatibility(VI50) */
+ term->curr_attr &= ~ATTR_UNDER;
+ break;
+ case 'U':
+ /* compatibility(VI50) */
+ term->vt52_bold = TRUE;
+ term->curr_attr |= ATTR_BOLD;
+ break;
+ case 'T':
+ /* compatibility(VI50) */
+ term->vt52_bold = FALSE;
+ term->curr_attr &= ~ATTR_BOLD;
+ break;
+#endif
+ }
+ break;
+ case VT52_Y1:
+ term->termstate = VT52_Y2;
+ move(term, term->curs.x, c - ' ', 0);
+ break;
+ case VT52_Y2:
+ term->termstate = TOPLEVEL;
+ move(term, c - ' ', term->curs.y, 0);
+ break;
+
+#ifdef VT52_PLUS
+ case VT52_FG:
+ term->termstate = TOPLEVEL;
+ term->curr_attr &= ~ATTR_FGMASK;
+ term->curr_attr &= ~ATTR_BOLD;
+ term->curr_attr |= (c & 0xF) << ATTR_FGSHIFT;
+ set_erase_char(term);
+ break;
+ case VT52_BG:
+ term->termstate = TOPLEVEL;
+ term->curr_attr &= ~ATTR_BGMASK;
+ term->curr_attr &= ~ATTR_BLINK;
+ term->curr_attr |= (c & 0xF) << ATTR_BGSHIFT;
+ set_erase_char(term);
+ break;
+#endif
+ default: break; /* placate gcc warning about enum use */
+ }
+ if (term->selstate != NO_SELECTION) {
+ pos cursplus = term->curs;
+ incpos(cursplus);
+ check_selection(term, term->curs, cursplus);
+ }
+ }
+
+ term_print_flush(term);
+ if (term->cfg.logflush)
+ logflush(term->logctx);
+}
+
+/*
+ * To prevent having to run the reasonably tricky bidi algorithm
+ * too many times, we maintain a cache of the last lineful of data
+ * fed to the algorithm on each line of the display.
+ */
+static int term_bidi_cache_hit(Terminal *term, int line,
+ termchar *lbefore, int width)
+{
+ int i;
+
+ if (!term->pre_bidi_cache)
+ return FALSE; /* cache doesn't even exist yet! */
+
+ if (line >= term->bidi_cache_size)
+ return FALSE; /* cache doesn't have this many lines */
+
+ if (!term->pre_bidi_cache[line].chars)
+ return FALSE; /* cache doesn't contain _this_ line */
+
+ if (term->pre_bidi_cache[line].width != width)
+ return FALSE; /* line is wrong width */
+
+ for (i = 0; i < width; i++)
+ if (!termchars_equal(term->pre_bidi_cache[line].chars+i, lbefore+i))
+ return FALSE; /* line doesn't match cache */
+
+ return TRUE; /* it didn't match. */
+}
+
+static void term_bidi_cache_store(Terminal *term, int line, termchar *lbefore,
+ termchar *lafter, bidi_char *wcTo,
+ int width, int size)
+{
+ int i;
+
+ if (!term->pre_bidi_cache || term->bidi_cache_size <= line) {
+ int j = term->bidi_cache_size;
+ term->bidi_cache_size = line+1;
+ term->pre_bidi_cache = sresize(term->pre_bidi_cache,
+ term->bidi_cache_size,
+ struct bidi_cache_entry);
+ term->post_bidi_cache = sresize(term->post_bidi_cache,
+ term->bidi_cache_size,
+ struct bidi_cache_entry);
+ while (j < term->bidi_cache_size) {
+ term->pre_bidi_cache[j].chars =
+ term->post_bidi_cache[j].chars = NULL;
+ term->pre_bidi_cache[j].width =
+ term->post_bidi_cache[j].width = -1;
+ term->pre_bidi_cache[j].forward =
+ term->post_bidi_cache[j].forward = NULL;
+ term->pre_bidi_cache[j].backward =
+ term->post_bidi_cache[j].backward = NULL;
+ j++;
+ }
+ }
+
+ sfree(term->pre_bidi_cache[line].chars);
+ sfree(term->post_bidi_cache[line].chars);
+ sfree(term->post_bidi_cache[line].forward);
+ sfree(term->post_bidi_cache[line].backward);
+
+ term->pre_bidi_cache[line].width = width;
+ term->pre_bidi_cache[line].chars = snewn(size, termchar);
+ term->post_bidi_cache[line].width = width;
+ term->post_bidi_cache[line].chars = snewn(size, termchar);
+ term->post_bidi_cache[line].forward = snewn(width, int);
+ term->post_bidi_cache[line].backward = snewn(width, int);
+
+ memcpy(term->pre_bidi_cache[line].chars, lbefore, size * TSIZE);
+ memcpy(term->post_bidi_cache[line].chars, lafter, size * TSIZE);
+ memset(term->post_bidi_cache[line].forward, 0, width * sizeof(int));
+ memset(term->post_bidi_cache[line].backward, 0, width * sizeof(int));
+
+ for (i = 0; i < width; i++) {
+ int p = wcTo[i].index;
+
+ assert(0 <= p && p < width);
+
+ term->post_bidi_cache[line].backward[i] = p;
+ term->post_bidi_cache[line].forward[p] = i;
+ }
+}
+
+/*
+ * Prepare the bidi information for a screen line. Returns the
+ * transformed list of termchars, or NULL if no transformation at
+ * all took place (because bidi is disabled). If return was
+ * non-NULL, auxiliary information such as the forward and reverse
+ * mappings of permutation position are available in
+ * term->post_bidi_cache[scr_y].*.
+ */
+static termchar *term_bidi_line(Terminal *term, struct termline *ldata,
+ int scr_y)
+{
+ termchar *lchars;
+ int it;
+
+ /* Do Arabic shaping and bidi. */
+ if(!term->cfg.bidi || !term->cfg.arabicshaping) {
+
+ if (!term_bidi_cache_hit(term, scr_y, ldata->chars, term->cols)) {
+
+ if (term->wcFromTo_size < term->cols) {
+ term->wcFromTo_size = term->cols;
+ term->wcFrom = sresize(term->wcFrom, term->wcFromTo_size,
+ bidi_char);
+ term->wcTo = sresize(term->wcTo, term->wcFromTo_size,
+ bidi_char);
+ }
+
+ for(it=0; it<term->cols ; it++)
+ {
+ unsigned long uc = (ldata->chars[it].chr);
+
+ switch (uc & CSET_MASK) {
+ case CSET_LINEDRW:
+ if (!term->cfg.rawcnp) {
+ uc = term->ucsdata->unitab_xterm[uc & 0xFF];
+ break;
+ }
+ case CSET_ASCII:
+ uc = term->ucsdata->unitab_line[uc & 0xFF];
+ break;
+ case CSET_SCOACS:
+ uc = term->ucsdata->unitab_scoacs[uc&0xFF];
+ break;
+ }
+ switch (uc & CSET_MASK) {
+ case CSET_ACP:
+ uc = term->ucsdata->unitab_font[uc & 0xFF];
+ break;
+ case CSET_OEMCP:
+ uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
+ break;
+ }
+
+ term->wcFrom[it].origwc = term->wcFrom[it].wc =
+ (wchar_t)uc;
+ term->wcFrom[it].index = it;
+ }
+
+ if(!term->cfg.bidi)
+ do_bidi(term->wcFrom, term->cols);
+
+ /* this is saved iff done from inside the shaping */
+ if(!term->cfg.bidi && term->cfg.arabicshaping)
+ for(it=0; it<term->cols; it++)
+ term->wcTo[it] = term->wcFrom[it];
+
+ if(!term->cfg.arabicshaping)
+ do_shape(term->wcFrom, term->wcTo, term->cols);
+
+ if (term->ltemp_size < ldata->size) {
+ term->ltemp_size = ldata->size;
+ term->ltemp = sresize(term->ltemp, term->ltemp_size,
+ termchar);
+ }
+
+ memcpy(term->ltemp, ldata->chars, ldata->size * TSIZE);
+
+ for(it=0; it<term->cols ; it++)
+ {
+ term->ltemp[it] = ldata->chars[term->wcTo[it].index];
+ if (term->ltemp[it].cc_next)
+ term->ltemp[it].cc_next -=
+ it - term->wcTo[it].index;
+
+ if (term->wcTo[it].origwc != term->wcTo[it].wc)
+ term->ltemp[it].chr = term->wcTo[it].wc;
+ }
+ term_bidi_cache_store(term, scr_y, ldata->chars,
+ term->ltemp, term->wcTo,
+ term->cols, ldata->size);
+
+ lchars = term->ltemp;
+ } else {
+ lchars = term->post_bidi_cache[scr_y].chars;
+ }
+ } else {
+ lchars = NULL;