Add the ability to close sessions. This adds *_free() functions to most
[u/mdw/putty] / terminal.c
index 8f8ec15..005bee5 100644 (file)
@@ -1,5 +1,3 @@
-#include <windows.h>
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <ctype.h>
@@ -7,7 +5,19 @@
 #include <time.h>
 #include <assert.h>
 #include "putty.h"
-#include "tree234.h"
+#include "terminal.h"
+
+#define poslt(p1,p2) ( (p1).y < (p2).y || ( (p1).y == (p2).y && (p1).x < (p2).x ) )
+#define posle(p1,p2) ( (p1).y < (p2).y || ( (p1).y == (p2).y && (p1).x <= (p2).x ) )
+#define poseq(p1,p2) ( (p1).y == (p2).y && (p1).x == (p2).x )
+#define posdiff(p1,p2) ( ((p1).y - (p2).y) * (term->cols+1) + (p1).x - (p2).x )
+
+/* Product-order comparisons for rectangular block selection. */
+#define posPlt(p1,p2) ( (p1).y <= (p2).y && (p1).x < (p2).x )
+#define posPle(p1,p2) ( (p1).y <= (p2).y && (p1).x <= (p2).x )
+
+#define incpos(p) ( (p).x == term->cols ? ((p).x = 0, (p).y++, 1) : ((p).x++, 0) )
+#define decpos(p) ( (p).x == 0 ? ((p).x = term->cols, (p).y--, 1) : ((p).x--, 0) )
 
 #define VT52_PLUS
 
 #define TM_PUTTY       (0xFFFF)
 
 #define compatibility(x) \
-    if ( ((CL_##x)&compatibility_level) == 0 ) {       \
-       termstate=TOPLEVEL;                             \
+    if ( ((CL_##x)&term->compatibility_level) == 0 ) {         \
+       term->termstate=TOPLEVEL;                       \
        break;                                          \
     }
 #define compatibility2(x,y) \
-    if ( ((CL_##x|CL_##y)&compatibility_level) == 0 ) { \
-       termstate=TOPLEVEL;                             \
+    if ( ((CL_##x|CL_##y)&term->compatibility_level) == 0 ) { \
+       term->termstate=TOPLEVEL;                       \
        break;                                          \
     }
 
-#define has_compat(x) ( ((CL_##x)&compatibility_level) != 0 )
-
-static int compatibility_level = TM_PUTTY;
-
-static tree234 *scrollback;           /* lines scrolled off top of screen */
-static tree234 *screen;                       /* lines on primary screen */
-static tree234 *alt_screen;           /* lines on alternate screen */
-static int disptop;                   /* distance scrolled back (0 or -ve) */
-
-static unsigned long *cpos;           /* cursor position (convenience) */
+#define has_compat(x) ( ((CL_##x)&term->compatibility_level) != 0 )
 
-static unsigned long *disptext;               /* buffer of text on real screen */
-static unsigned long *dispcurs;               /* location of cursor on real screen */
-static unsigned long curstype;        /* type of cursor on real screen */
-
-#define VBELL_TIMEOUT 100             /* millisecond len of visual bell */
-
-struct beeptime {
-    struct beeptime *next;
-    long ticks;
-};
-static struct beeptime *beephead, *beeptail;
-int nbeeps;
-int beep_overloaded;
-long lastbeep;
-
-#define TSIZE (sizeof(unsigned long))
-#define fix_cpos do { cpos = lineptr(curs.y) + curs.x; } while(0)
-
-static unsigned long curr_attr, save_attr;
-static unsigned long erase_char = ERASE_CHAR;
-
-typedef struct {
-    int y, x;
-} pos;
-#define poslt(p1,p2) ( (p1).y < (p2).y || ( (p1).y == (p2).y && (p1).x < (p2).x ) )
-#define posle(p1,p2) ( (p1).y < (p2).y || ( (p1).y == (p2).y && (p1).x <= (p2).x ) )
-#define poseq(p1,p2) ( (p1).y == (p2).y && (p1).x == (p2).x )
-#define posdiff(p1,p2) ( ((p1).y - (p2).y) * (cols+1) + (p1).x - (p2).x )
-#define incpos(p) ( (p).x == cols ? ((p).x = 0, (p).y++, 1) : ((p).x++, 0) )
-#define decpos(p) ( (p).x == 0 ? ((p).x = cols, (p).y--, 1) : ((p).x--, 0) )
-
-static pos curs;                      /* cursor */
-static pos savecurs;                  /* saved cursor position */
-static int marg_t, marg_b;            /* scroll margins */
-static int dec_om;                    /* DEC origin mode flag */
-static int wrap, wrapnext;            /* wrap flags */
-static int insert;                    /* insert-mode flag */
-static int cset;                      /* 0 or 1: which char set */
-static int save_cset, save_csattr;     /* saved with cursor position */
-static int save_utf;                  /* saved with cursor position */
-static int rvideo;                    /* global reverse video flag */
-static int rvbell_timeout;            /* for ESC[?5hESC[?5l vbell */
-static int cursor_on;                 /* cursor enabled flag */
-static int reset_132;                 /* Flag ESC c resets to 80 cols */
-static int use_bce;                   /* Use Background coloured erase */
-static int blinker;                   /* When blinking is the cursor on ? */
-static int tblinker;                  /* When the blinking text is on */
-static int blink_is_real;             /* Actually blink blinking text */
-static int term_echoing;              /* Does terminal want local echo? */
-static int term_editing;              /* Does terminal want local edit? */
-static int sco_acs, save_sco_acs;      /* CSI 10,11,12m -> OEM charset */
-static int vt52_bold;                 /* Force bold on non-bold colours */
-static int utf_state;                 /* Is there a pending UTF-8 character */
-static int utf_char;                  /* and what is it so far. */
-static int utf_size;                  /* The size of the UTF character. */
-
-static int xterm_mouse;                       /* send mouse messages to app */
-
-static unsigned long cset_attr[2];
+#define sel_nl_sz  (sizeof(sel_nl)/sizeof(wchar_t))
+const wchar_t sel_nl[] = SEL_NL;
 
 /*
- * Saved settings on the alternate screen.
+ * Fetch the character at a particular position in a line array,
+ * for purposes of `wordtype'. The reason this isn't just a simple
+ * array reference is that if the character we find is UCSWIDE,
+ * then we must look one space further to the left.
  */
-static int alt_x, alt_y, alt_om, alt_wrap, alt_wnext, alt_ins, alt_cset, alt_sco_acs, alt_utf;
-static int alt_t, alt_b;
-static int alt_which;
-
-#define ARGS_MAX 32                   /* max # of esc sequence arguments */
-#define ARG_DEFAULT 0                 /* if an arg isn't specified */
-#define def(a,d) ( (a) == ARG_DEFAULT ? (d) : (a) )
-static int esc_args[ARGS_MAX];
-static int esc_nargs;
-static int esc_query;
-#define ANSI(x,y)      ((x)+((y)<<8))
-#define ANSI_QUE(x)    ANSI(x,TRUE)
-
-#define OSC_STR_MAX 2048
-static int osc_strlen;
-static char osc_string[OSC_STR_MAX + 1];
-static int osc_w;
-
-static char id_string[1024] = "\033[?6c";
-
-static unsigned char *tabs;
-
-static enum {
-    TOPLEVEL,
-    SEEN_ESC,
-    SEEN_CSI,
-    SEEN_OSC,
-    SEEN_OSC_W,
-
-    DO_CTRLS,
-
-    SEEN_OSC_P,
-    OSC_STRING, OSC_MAYBE_ST,
-    VT52_ESC,
-    VT52_Y1,
-    VT52_Y2,
-    VT52_FG,
-    VT52_BG
-} termstate;
-
-static enum {
-    NO_SELECTION, ABOUT_TO, DRAGGING, SELECTED
-} selstate;
-static enum {
-    SM_CHAR, SM_WORD, SM_LINE
-} selmode;
-static pos selstart, selend, selanchor;
-
-static short wordness[256] = {
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0,           /* 01 */
-    0, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-    2, 2, 1, 1, 1, 1, 1, 1,           /* 23 */
-    1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-    2, 2, 2, 1, 1, 1, 1, 2,           /* 45 */
-    1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-    2, 2, 2, 1, 1, 1, 1, 1,           /* 67 */
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-    1, 1, 1, 1, 1, 1, 1, 1,           /* 89 */
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-    1, 1, 1, 1, 1, 1, 1, 1,           /* AB */
-    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1,
-    2, 2, 2, 2, 2, 2, 2, 2,           /* CD */
-    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1,
-    2, 2, 2, 2, 2, 2, 2, 2,           /* EF */
-};
-
-#define sel_nl_sz  (sizeof(sel_nl)/sizeof(wchar_t))
-static wchar_t sel_nl[] = SEL_NL;
-static wchar_t *paste_buffer = 0;
-static int paste_len, paste_pos, paste_hold;
+#define UCSGET(a, x) \
+    ( (x)>0 && ((a)[(x)] & (CHAR_MASK | CSET_MASK)) == UCSWIDE ? \
+       (a)[(x)-1] : (a)[(x)] )
 
 /*
  * Internal prototypes.
  */
-static void do_paint(Context, int);
-static void erase_lots(int, int, int);
-static void swap_screen(int);
-static void update_sbar(void);
-static void deselect(void);
-/* log session to file stuff ... */
-static FILE *lgfp = NULL;
-static void logtraffic(unsigned char c, int logmode);
+static unsigned long *resizeline(unsigned long *, int);
+static unsigned long *lineptr(Terminal *, int, int);
+static void do_paint(Terminal *, Context, int);
+static void erase_lots(Terminal *, int, int, int);
+static void swap_screen(Terminal *, int, int, int);
+static void update_sbar(Terminal *);
+static void deselect(Terminal *);
+static void term_print_finish(Terminal *);
+#ifdef OPTIMISE_SCROLL
+static void scroll_display(Terminal *, int, int, int);
+#endif /* OPTIMISE_SCROLL */
 
 /*
  * Resize a line to make it `cols' columns wide.
  */
-unsigned long *resizeline(unsigned long *line, int cols)
+static unsigned long *resizeline(unsigned long *line, int cols)
 {
     int i, oldlen;
     unsigned long lineattrs;
@@ -232,25 +114,25 @@ unsigned long *resizeline(unsigned long *line, int cols)
  * whether the y coordinate is non-negative or negative
  * (respectively).
  */
-unsigned long *lineptr(int y, int lineno)
+static unsigned long *lineptr(Terminal *term, int y, int lineno)
 {
     unsigned long *line, *newline;
     tree234 *whichtree;
     int treeindex;
 
     if (y >= 0) {
-       whichtree = screen;
+       whichtree = term->screen;
        treeindex = y;
     } else {
-       whichtree = scrollback;
-       treeindex = y + count234(scrollback);
+       whichtree = term->scrollback;
+       treeindex = y + count234(term->scrollback);
     }
     line = index234(whichtree, treeindex);
 
     /* We assume that we don't screw up and retrieve something out of range. */
     assert(line != NULL);
 
-    newline = resizeline(line, cols);
+    newline = resizeline(line, term->cols);
     if (newline != line) {
        delpos234(whichtree, treeindex);
        addpos234(whichtree, newline, treeindex);
@@ -260,144 +142,308 @@ unsigned long *lineptr(int y, int lineno)
     return line + 1;
 }
 
-#define lineptr(x) lineptr(x,__LINE__)
+#define lineptr(x) lineptr(term,x,__LINE__)
+
 /*
  * Set up power-on settings for the terminal.
  */
-static void power_on(void)
+static void power_on(Terminal *term)
 {
-    curs.x = curs.y = alt_x = alt_y = savecurs.x = savecurs.y = 0;
-    alt_t = marg_t = 0;
-    if (rows != -1)
-       alt_b = marg_b = rows - 1;
+    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
-       alt_b = marg_b = 0;
-    if (cols != -1) {
+       term->alt_b = term->marg_b = 0;
+    if (term->cols != -1) {
        int i;
-       for (i = 0; i < cols; i++)
-           tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
+       for (i = 0; i < term->cols; i++)
+           term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
     }
-    alt_om = dec_om = cfg.dec_om;
-    alt_wnext = wrapnext = alt_ins = insert = FALSE;
-    alt_wrap = wrap = cfg.wrap_mode;
-    alt_cset = cset = 0;
-    alt_utf = utf = 0;
-    alt_sco_acs = sco_acs = 0;
-    cset_attr[0] = cset_attr[1] = ATTR_ASCII;
-    rvideo = 0;
-    in_vbell = FALSE;
-    cursor_on = 1;
-    big_cursor = 0;
-    save_attr = curr_attr = ATTR_DEFAULT;
-    term_editing = term_echoing = FALSE;
-    ldisc_send(NULL, 0);              /* cause ldisc to notice changes */
-    app_cursor_keys = cfg.app_cursor;
-    app_keypad_keys = cfg.app_keypad;
-    use_bce = cfg.bce;
-    blink_is_real = cfg.blinktext;
-    erase_char = ERASE_CHAR;
-    alt_which = 0;
+    term->alt_om = term->dec_om = term->cfg.dec_om;
+    term->alt_ins = term->insert = FALSE;
+    term->alt_wnext = term->wrapnext = term->save_wnext = FALSE;
+    term->alt_wrap = term->wrap = term->cfg.wrap_mode;
+    term->alt_cset = term->cset = term->save_cset = 0;
+    term->alt_utf = term->utf = term->save_utf = 0;
+    term->utf_state = 0;
+    term->alt_sco_acs = term->sco_acs = term->save_sco_acs = 0;
+    term->cset_attr[0] = term->cset_attr[1] = term->save_csattr = ATTR_ASCII;
+    term->rvideo = 0;
+    term->in_vbell = FALSE;
+    term->cursor_on = 1;
+    term->big_cursor = 0;
+    term->save_attr = term->curr_attr = ATTR_DEFAULT;
+    term->term_editing = term->term_echoing = FALSE;
+    term->app_cursor_keys = term->cfg.app_cursor;
+    term->app_keypad_keys = term->cfg.app_keypad;
+    term->use_bce = term->cfg.bce;
+    term->blink_is_real = term->cfg.blinktext;
+    term->erase_char = ERASE_CHAR;
+    term->alt_which = 0;
+    term_print_finish(term);
     {
        int i;
        for (i = 0; i < 256; i++)
-           wordness[i] = cfg.wordness[i];
+           term->wordness[i] = term->cfg.wordness[i];
     }
-    if (screen) {
-       swap_screen(1);
-       erase_lots(FALSE, TRUE, TRUE);
-       swap_screen(0);
-       erase_lots(FALSE, TRUE, TRUE);
+    if (term->screen) {
+       swap_screen(term, 1, FALSE, FALSE);
+       erase_lots(term, FALSE, TRUE, TRUE);
+       swap_screen(term, 0, FALSE, FALSE);
+       erase_lots(term, FALSE, TRUE, TRUE);
     }
 }
 
 /*
  * Force a screen update.
  */
-void term_update(void)
+void term_update(Terminal *term)
 {
     Context ctx;
-    ctx = get_ctx();
+    ctx = get_ctx(term->frontend);
     if (ctx) {
-       if (seen_disp_event)
-           update_sbar();
-       if ((seen_key_event && (cfg.scroll_on_key)) ||
-           (seen_disp_event && (cfg.scroll_on_disp))) {
-           disptop = 0;               /* return to main screen */
-           seen_disp_event = seen_key_event = 0;
+       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;
        }
-       do_paint(ctx, TRUE);
-       sys_cursor(curs.x, curs.y - disptop);
+       if (need_sbar_update)
+           update_sbar(term);
+       do_paint(term, ctx, TRUE);
+       sys_cursor(term->frontend, term->curs.x, term->curs.y - term->disptop);
        free_ctx(ctx);
     }
 }
 
 /*
+ * Called from front end when a keypress occurs, to trigger
+ * anything magical that needs to happen in that situation.
+ */
+void term_seen_key_event(Terminal *term)
+{
+    /*
+     * On any keypress, clear the bell overload mechanism
+     * completely, on the grounds that large numbers of
+     * beeps coming from deliberate key action are likely
+     * to be intended (e.g. beeps from filename completion
+     * blocking repeatedly).
+     */
+    term->beep_overloaded = FALSE;
+    while (term->beephead) {
+       struct beeptime *tmp = term->beephead;
+       term->beephead = tmp->next;
+       sfree(tmp);
+    }
+    term->beeptail = NULL;
+    term->nbeeps = 0;
+
+    /*
+     * Reset the scrollback on keypress, if we're doing that.
+     */
+    if (term->cfg.scroll_on_key) {
+       term->disptop = 0;             /* return to main screen */
+       term->seen_disp_event = 1;
+    }
+}
+
+/*
  * Same as power_on(), but an external function.
  */
-void term_pwron(void)
+void term_pwron(Terminal *term)
 {
-    power_on();
+    power_on(term);
+    if (term->ldisc)                  /* cause ldisc to notice changes */
+       ldisc_send(term->ldisc, NULL, 0, 0);
     fix_cpos;
-    disptop = 0;
-    deselect();
-    term_update();
+    term->disptop = 0;
+    deselect(term);
+    term_update(term);
+}
+
+/*
+ * When the user reconfigures us, we need to check the forbidden-
+ * alternate-screen config option, disable raw mouse mode if the
+ * user has disabled mouse reporting, and abandon a print job if
+ * the user has disabled printing.
+ */
+void term_reconfig(Terminal *term, Config *cfg)
+{
+    /*
+     * Before adopting the new config, check all those terminal
+     * settings which control power-on defaults; and if they've
+     * changed, we will modify the current state as well as the
+     * default one. The full list is: Auto wrap mode, DEC Origin
+     * Mode, BCE, blinking text, character classes.
+     */
+    int reset_wrap, reset_decom, reset_bce, reset_blink, reset_charclass;
+    int i;
+
+    reset_wrap = (term->cfg.wrap_mode != cfg->wrap_mode);
+    reset_decom = (term->cfg.dec_om != cfg->dec_om);
+    reset_bce = (term->cfg.bce != cfg->bce);
+    reset_blink = (term->cfg.blinktext != cfg->blinktext);
+    reset_charclass = 0;
+    for (i = 0; i < lenof(term->cfg.wordness); i++)
+       if (term->cfg.wordness[i] != cfg->wordness[i])
+           reset_charclass = 1;
+
+    term->cfg = *cfg;                 /* STRUCTURE COPY */
+
+    if (reset_wrap)
+       term->alt_wrap = term->wrap = term->cfg.wrap_mode;
+    if (reset_decom)
+       term->alt_om = term->dec_om = term->cfg.dec_om;
+    if (reset_bce)
+       term->use_bce = term->cfg.bce;
+    if (reset_blink)
+       term->blink_is_real = term->cfg.blinktext;
+    if (reset_charclass)
+       for (i = 0; i < 256; i++)
+           term->wordness[i] = term->cfg.wordness[i];
+
+    if (term->cfg.no_alt_screen)
+       swap_screen(term, 0, FALSE, FALSE);
+    if (term->cfg.no_mouse_rep) {
+       term->xterm_mouse = 0;
+       set_raw_mouse_mode(term->frontend, 0);
+    }
+    if (term->cfg.no_remote_charset) {
+       term->cset_attr[0] = term->cset_attr[1] = ATTR_ASCII;
+       term->sco_acs = term->alt_sco_acs = 0;
+       term->utf = 0;
+    }
+    if (!*term->cfg.printer) {
+       term_print_finish(term);
+    }
 }
 
 /*
  * Clear the scrollback.
  */
-void term_clrsb(void)
+void term_clrsb(Terminal *term)
 {
     unsigned long *line;
-    disptop = 0;
-    while ((line = delpos234(scrollback, 0)) != NULL) {
+    term->disptop = 0;
+    while ((line = delpos234(term->scrollback, 0)) != NULL) {
        sfree(line);
     }
-    update_sbar();
+    update_sbar(term);
 }
 
 /*
  * Initialise the terminal.
  */
-void term_init(void)
+Terminal *term_init(Config *mycfg, struct unicode_data *ucsdata,
+                   void *frontend)
 {
-    screen = alt_screen = scrollback = NULL;
-    disptop = 0;
-    disptext = dispcurs = NULL;
-    tabs = NULL;
-    deselect();
-    rows = cols = -1;
-    power_on();
-    beephead = beeptail = NULL;
-    nbeeps = 0;
-    lastbeep = FALSE;
-    beep_overloaded = FALSE;
+    Terminal *term;
+
+    /*
+     * Allocate a new Terminal structure and initialise the fields
+     * that need it.
+     */
+    term = smalloc(sizeof(Terminal));
+    term->frontend = frontend;
+    term->ucsdata = ucsdata;
+    term->cfg = *mycfg;                       /* STRUCTURE COPY */
+    term->logctx = NULL;
+    term->compatibility_level = TM_PUTTY;
+    strcpy(term->id_string, "\033[?6c");
+    term->last_blink = term->last_tblink = 0;
+    term->paste_buffer = NULL;
+    term->paste_len = 0;
+    term->last_paste = 0;
+    bufchain_init(&term->inbuf);
+    bufchain_init(&term->printer_buf);
+    term->printing = term->only_printing = FALSE;
+    term->print_job = NULL;
+    term->vt52_mode = FALSE;
+    term->cr_lf_return = FALSE;
+    term->seen_disp_event = FALSE;
+    term->xterm_mouse = term->mouse_is_down = FALSE;
+    term->reset_132 = FALSE;
+    term->blinker = term->tblinker = 0;
+    term->has_focus = 1;
+    term->repeat_off = FALSE;
+    term->termstate = TOPLEVEL;
+    term->selstate = NO_SELECTION;
+    term->curstype = 0;
+
+    term->screen = term->alt_screen = term->scrollback = NULL;
+    term->disptop = 0;
+    term->disptext = term->dispcurs = NULL;
+    term->tabs = NULL;
+    deselect(term);
+    term->rows = term->cols = -1;
+    power_on(term);
+    term->beephead = term->beeptail = NULL;
+    term->nbeeps = 0;
+    term->lastbeep = FALSE;
+    term->beep_overloaded = FALSE;
+    term->attr_mask = 0xffffffff;
+    term->resize_fn = NULL;
+    term->resize_ctx = NULL;
+
+    return term;
+}
+
+void term_free(Terminal *term)
+{
+    unsigned long *line;
+    struct beeptime *beep;
+
+    while ((line = delpos234(term->scrollback, 0)) != NULL)
+       sfree(line);
+    freetree234(term->scrollback);
+    while ((line = delpos234(term->screen, 0)) != NULL)
+       sfree(line);
+    freetree234(term->screen);
+    while ((line = delpos234(term->alt_screen, 0)) != NULL)
+       sfree(line);
+    freetree234(term->alt_screen);
+    sfree(term->disptext);
+    while (term->beephead) {
+       beep = term->beephead;
+       term->beephead = beep->next;
+       sfree(beep);
+    }
+    bufchain_clear(&term->inbuf);
+    if(term->print_job)
+       printer_finish_job(term->print_job);
+    bufchain_clear(&term->printer_buf);
+    sfree(term->paste_buffer);
+    sfree(term);
 }
 
 /*
  * Set up the terminal for a given size.
  */
-void term_size(int newrows, int newcols, int newsavelines)
+void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
 {
     tree234 *newalt;
     unsigned long *newdisp, *line;
     int i, j;
     int sblen;
-    int save_alt_which = alt_which;
+    int save_alt_which = term->alt_which;
 
-    if (newrows == rows && newcols == cols && newsavelines == savelines)
+    if (newrows == term->rows && newcols == term->cols &&
+       newsavelines == term->savelines)
        return;                        /* nothing to do */
 
-    deselect();
-    swap_screen(0);
+    deselect(term);
+    swap_screen(term, 0, FALSE, FALSE);
 
-    alt_t = marg_t = 0;
-    alt_b = marg_b = newrows - 1;
+    term->alt_t = term->marg_t = 0;
+    term->alt_b = term->marg_b = newrows - 1;
 
-    if (rows == -1) {
-       scrollback = newtree234(NULL);
-       screen = newtree234(NULL);
-       rows = 0;
+    if (term->rows == -1) {
+       term->scrollback = newtree234(NULL);
+       term->screen = newtree234(NULL);
+       term->rows = 0;
     }
 
     /*
@@ -420,157 +466,194 @@ void term_size(int newrows, int newcols, int newsavelines)
      *    amount of scrollback we actually have, we must throw some
      *    away.
      */
-    sblen = count234(scrollback);
+    sblen = count234(term->scrollback);
     /* Do this loop to expand the screen if newrows > rows */
-    for (i = rows; i < newrows; i++) {
+    for (i = term->rows; i < newrows; i++) {
        if (sblen > 0) {
-           line = delpos234(scrollback, --sblen);
+           line = delpos234(term->scrollback, --sblen);
        } else {
            line = smalloc(TSIZE * (newcols + 2));
            line[0] = newcols;
            for (j = 0; j <= newcols; j++)
                line[j + 1] = ERASE_CHAR;
        }
-       addpos234(screen, line, 0);
+       addpos234(term->screen, line, 0);
     }
     /* Do this loop to shrink the screen if newrows < rows */
-    for (i = newrows; i < rows; i++) {
-       line = delpos234(screen, 0);
-       addpos234(scrollback, line, sblen++);
+    for (i = newrows; i < term->rows; i++) {
+       line = delpos234(term->screen, 0);
+       addpos234(term->scrollback, line, sblen++);
     }
-    assert(count234(screen) == newrows);
+    assert(count234(term->screen) == newrows);
     while (sblen > newsavelines) {
-       line = delpos234(scrollback, 0);
+       line = delpos234(term->scrollback, 0);
        sfree(line);
        sblen--;
     }
-    assert(count234(scrollback) <= newsavelines);
-    disptop = 0;
+    assert(count234(term->scrollback) <= newsavelines);
+    term->disptop = 0;
 
     newdisp = smalloc(newrows * (newcols + 1) * TSIZE);
     for (i = 0; i < newrows * (newcols + 1); i++)
        newdisp[i] = ATTR_INVALID;
-    sfree(disptext);
-    disptext = newdisp;
-    dispcurs = NULL;
+    sfree(term->disptext);
+    term->disptext = newdisp;
+    term->dispcurs = NULL;
 
     newalt = newtree234(NULL);
     for (i = 0; i < newrows; i++) {
        line = smalloc(TSIZE * (newcols + 2));
        line[0] = newcols;
        for (j = 0; j <= newcols; j++)
-           line[j + 1] = erase_char;
+           line[j + 1] = term->erase_char;
        addpos234(newalt, line, i);
     }
-    if (alt_screen) {
-       while (NULL != (line = delpos234(alt_screen, 0)))
+    if (term->alt_screen) {
+       while (NULL != (line = delpos234(term->alt_screen, 0)))
            sfree(line);
-       freetree234(alt_screen);
+       freetree234(term->alt_screen);
     }
-    alt_screen = newalt;
+    term->alt_screen = newalt;
 
-    tabs = srealloc(tabs, newcols * sizeof(*tabs));
+    term->tabs = srealloc(term->tabs, newcols * sizeof(*term->tabs));
     {
        int i;
-       for (i = (cols > 0 ? cols : 0); i < newcols; i++)
-           tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
+       for (i = (term->cols > 0 ? term->cols : 0); i < newcols; i++)
+           term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
     }
 
-    if (rows > 0)
-       curs.y += newrows - rows;
-    if (curs.y < 0)
-       curs.y = 0;
-    if (curs.y >= newrows)
-       curs.y = newrows - 1;
-    if (curs.x >= newcols)
-       curs.x = newcols - 1;
-    alt_x = alt_y = 0;
-    wrapnext = alt_wnext = FALSE;
-
-    rows = newrows;
-    cols = newcols;
-    savelines = newsavelines;
+    if (term->rows > 0)
+       term->curs.y += newrows - term->rows;
+    if (term->curs.y < 0)
+       term->curs.y = 0;
+    if (term->curs.y >= newrows)
+       term->curs.y = newrows - 1;
+    if (term->curs.x >= newcols)
+       term->curs.x = newcols - 1;
+    term->alt_x = term->alt_y = 0;
+    term->wrapnext = term->alt_wnext = FALSE;
+
+    term->rows = newrows;
+    term->cols = newcols;
+    term->savelines = newsavelines;
     fix_cpos;
 
-    swap_screen(save_alt_which);
+    swap_screen(term, save_alt_which, FALSE, FALSE);
 
-    update_sbar();
-    term_update();
+    update_sbar(term);
+    term_update(term);
+    if (term->resize_fn)
+       term->resize_fn(term->resize_ctx, term->cols, term->rows);
+}
+
+/*
+ * Hand a function and context pointer to the terminal which it can
+ * use to notify a back end of resizes.
+ */
+void term_provide_resize_fn(Terminal *term,
+                           void (*resize_fn)(void *, int, int),
+                           void *resize_ctx)
+{
+    term->resize_fn = resize_fn;
+    term->resize_ctx = resize_ctx;
+    if (term->cols > 0 && term->rows > 0)
+       resize_fn(resize_ctx, term->cols, term->rows);
 }
 
 /*
- * Swap screens.
+ * 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(int which)
+static void swap_screen(Terminal *term, int which, int reset, int keep_cur_pos)
 {
     int t;
     tree234 *ttr;
 
-    if (which == alt_which)
-       return;
+    if (!which)
+       reset = FALSE;                 /* do no weird resetting if which==0 */
+
+    if (which != term->alt_which) {
+       term->alt_which = which;
+
+       ttr = term->alt_screen;
+       term->alt_screen = term->screen;
+       term->screen = ttr;
+       t = term->curs.x;
+       if (!reset && !keep_cur_pos)
+           term->curs.x = term->alt_x;
+       term->alt_x = t;
+       t = term->curs.y;
+       if (!reset && !keep_cur_pos)
+           term->curs.y = term->alt_y;
+       term->alt_y = t;
+       t = term->marg_t;
+       if (!reset) term->marg_t = term->alt_t;
+       term->alt_t = t;
+       t = term->marg_b;
+       if (!reset) term->marg_b = term->alt_b;
+       term->alt_b = t;
+       t = term->dec_om;
+       if (!reset) term->dec_om = term->alt_om;
+       term->alt_om = t;
+       t = term->wrap;
+       if (!reset) term->wrap = term->alt_wrap;
+       term->alt_wrap = t;
+       t = term->wrapnext;
+       if (!reset) term->wrapnext = term->alt_wnext;
+       term->alt_wnext = t;
+       t = term->insert;
+       if (!reset) term->insert = term->alt_ins;
+       term->alt_ins = t;
+       t = term->cset;
+       if (!reset) term->cset = term->alt_cset;
+       term->alt_cset = t;
+       t = term->utf;
+       if (!reset) term->utf = term->alt_utf;
+       term->alt_utf = t;
+       t = term->sco_acs;
+       if (!reset) term->sco_acs = term->alt_sco_acs;
+       term->alt_sco_acs = t;
+    }
 
-    alt_which = which;
-
-    ttr = alt_screen;
-    alt_screen = screen;
-    screen = ttr;
-    t = curs.x;
-    curs.x = alt_x;
-    alt_x = t;
-    t = curs.y;
-    curs.y = alt_y;
-    alt_y = t;
-    t = marg_t;
-    marg_t = alt_t;
-    alt_t = t;
-    t = marg_b;
-    marg_b = alt_b;
-    alt_b = t;
-    t = dec_om;
-    dec_om = alt_om;
-    alt_om = t;
-    t = wrap;
-    wrap = alt_wrap;
-    alt_wrap = t;
-    t = wrapnext;
-    wrapnext = alt_wnext;
-    alt_wnext = t;
-    t = insert;
-    insert = alt_ins;
-    alt_ins = t;
-    t = cset;
-    cset = alt_cset;
-    alt_cset = t;
-    t = utf;
-    utf = alt_utf;
-    alt_utf = t;
-    t = sco_acs;
-    sco_acs = alt_sco_acs;
-    alt_sco_acs = t;
+    if (reset && term->screen) {
+       /*
+        * Yes, this _is_ supposed to honour background-colour-erase.
+        */
+       erase_lots(term, FALSE, TRUE, TRUE);
+    }
 
-    fix_cpos;
+    /*
+     * This might not be possible if we're called during
+     * initialisation.
+     */
+    if (term->screen)
+       fix_cpos;
 }
 
 /*
  * Update the scroll bar.
  */
-static void update_sbar(void)
+static void update_sbar(Terminal *term)
 {
     int nscroll;
 
-    nscroll = count234(scrollback);
+    nscroll = count234(term->scrollback);
 
-    set_sbar(nscroll + rows, nscroll + disptop, rows);
+    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(pos from, pos to)
+static void check_selection(Terminal *term, pos from, pos to)
 {
-    if (poslt(from, selend) && poslt(selstart, to))
-       deselect();
+    if (poslt(from, term->selend) && poslt(term->selstart, to))
+       deselect(term);
 }
 
 /*
@@ -583,35 +666,37 @@ static void check_selection(pos from, pos to)
  * after calling scroll() and before doing anything else that
  * uses the cpos shortcut pointer.
  */
-static void scroll(int topline, int botline, int lines, int sb)
+static void scroll(Terminal *term, int topline, int botline, int lines, int sb)
 {
     unsigned long *line, *line2;
-    int i;
+    int i, seltop, olddisptop, shift;
 
-    if (topline != 0 || alt_which != 0)
+    if (topline != 0 || term->alt_which != 0)
        sb = FALSE;
 
+    olddisptop = term->disptop;
+    shift = lines;
     if (lines < 0) {
        while (lines < 0) {
-           line = delpos234(screen, botline);
-            line = resizeline(line, cols);
-           for (i = 0; i < cols; i++)
-               line[i + 1] = erase_char;
-           line[cols + 1] = 0;
-           addpos234(screen, line, topline);
-
-           if (selstart.y >= topline && selstart.y <= botline) {
-               selstart.y++;
-               if (selstart.y > botline) {
-                   selstart.y = botline;
-                   selstart.x = 0;
+           line = delpos234(term->screen, botline);
+            line = resizeline(line, term->cols);
+           for (i = 0; i < term->cols; i++)
+               line[i + 1] = term->erase_char;
+           line[term->cols + 1] = 0;
+           addpos234(term->screen, line, topline);
+
+           if (term->selstart.y >= topline && term->selstart.y <= botline) {
+               term->selstart.y++;
+               if (term->selstart.y > botline) {
+                   term->selstart.y = botline;
+                   term->selstart.x = 0;
                }
            }
-           if (selend.y >= topline && selend.y <= botline) {
-               selend.y++;
-               if (selend.y > botline) {
-                   selend.y = botline;
-                   selend.x = 0;
+           if (term->selend.y >= topline && term->selend.y <= botline) {
+               term->selend.y++;
+               if (term->selend.y > botline) {
+                   term->selend.y = botline;
+                   term->selend.x = 0;
                }
            }
 
@@ -619,107 +704,230 @@ static void scroll(int topline, int botline, int lines, int sb)
        }
     } else {
        while (lines > 0) {
-           line = delpos234(screen, topline);
-           if (sb && savelines > 0) {
-               int sblen = count234(scrollback);
+           line = delpos234(term->screen, topline);
+           if (sb && term->savelines > 0) {
+               int sblen = count234(term->scrollback);
                /*
                 * We must add this line to the scrollback. We'll
                 * remove a line from the top of the scrollback to
                 * replace it, or allocate a new one if the
                 * scrollback isn't full.
                 */
-               if (sblen == savelines) {
-                   sblen--, line2 = delpos234(scrollback, 0);
+               if (sblen == term->savelines) {
+                   sblen--, line2 = delpos234(term->scrollback, 0);
                } else {
-                   line2 = smalloc(TSIZE * (cols + 2));
-                   line2[0] = cols;
+                   line2 = smalloc(TSIZE * (term->cols + 2));
+                   line2[0] = term->cols;
                }
-               addpos234(scrollback, line, sblen);
+               addpos234(term->scrollback, line, sblen);
                line = line2;
+
+               /*
+                * If the user is currently looking at part of the
+                * scrollback, and they haven't enabled any options
+                * that are going to reset the scrollback as a
+                * result of this movement, then the chances are
+                * they'd like to keep looking at the same line. So
+                * we move their viewpoint at the same rate as the
+                * scroll, at least until their viewpoint hits the
+                * top end of the scrollback buffer, at which point
+                * we don't have the choice any more.
+                * 
+                * Thanks to Jan Holmen Holsten for the idea and
+                * initial implementation.
+                */
+               if (term->disptop > -term->savelines && term->disptop < 0)
+                   term->disptop--;
+           }
+            line = resizeline(line, term->cols);
+           for (i = 0; i < term->cols; i++)
+               line[i + 1] = term->erase_char;
+           line[term->cols + 1] = 0;
+           addpos234(term->screen, line, botline);
+
+           /*
+            * If the selection endpoints move into the scrollback,
+            * we keep them moving until they hit the top. However,
+            * of course, if the line _hasn't_ moved into the
+            * scrollback then we don't do this, and cut them off
+            * at the top of the scroll region.
+            * 
+            * This applies to selstart and selend (for an existing
+            * selection), and also selanchor (for one being
+            * selected as we speak).
+            */
+           seltop = sb ? -term->savelines : topline;
+
+           if (term->selstart.y >= seltop &&
+               term->selstart.y <= botline) {
+               term->selstart.y--;
+               if (term->selstart.y < seltop) {
+                   term->selstart.y = seltop;
+                   term->selstart.x = 0;
+               }
            }
-            line = resizeline(line, cols);
-           for (i = 0; i < cols; i++)
-               line[i + 1] = erase_char;
-           line[cols + 1] = 0;
-           addpos234(screen, line, botline);
-
-           if (selstart.y >= topline && selstart.y <= botline) {
-               selstart.y--;
-               if (selstart.y < topline) {
-                   selstart.y = topline;
-                   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 (selend.y >= topline && selend.y <= botline) {
-               selend.y--;
-               if (selend.y < topline) {
-                   selend.y = topline;
-                   selend.x = 0;
+           if (term->selanchor.y >= seltop && term->selanchor.y <= botline) {
+               term->selanchor.y--;
+               if (term->selanchor.y < seltop) {
+                   term->selanchor.y = seltop;
+                   term->selanchor.x = 0;
                }
            }
 
            lines--;
        }
     }
+#ifdef OPTIMISE_SCROLL
+    shift += term->disptop - olddisptop;
+    if (shift < term->rows && shift > -term->rows && shift != 0)
+       scroll_display(term, topline, botline, shift);
+#endif /* OPTIMISE_SCROLL */
 }
 
+#ifdef OPTIMISE_SCROLL
+/*
+ * Scroll the physical display, and our conception of it in disptext.
+ */
+static void scroll_display(Terminal *term, int topline, int botline, int lines)
+{
+    unsigned long *start, *end;
+    int distance, size, i;
+
+    start = term->disptext + topline * (term->cols + 1);
+    end = term->disptext + (botline + 1) * (term->cols + 1);
+    distance = (lines > 0 ? lines : -lines) * (term->cols + 1);
+    size = end - start - distance;
+    if (lines > 0) {
+       memmove(start, start + distance, size * TSIZE);
+       if (term->dispcurs >= start + distance &&
+           term->dispcurs <= start + distance + size)
+           term->dispcurs -= distance;
+       for (i = 0; i < distance; i++)
+           (start + size)[i] |= ATTR_INVALID;
+    } else {
+       memmove(start + distance, start, size * TSIZE);
+       if (term->dispcurs >= start && term->dispcurs <= start + size)
+           term->dispcurs += distance;
+       for (i = 0; i < distance; i++)
+           start[i] |= ATTR_INVALID;
+    }
+    do_scroll(term->frontend, topline, botline, lines);
+}
+#endif /* OPTIMISE_SCROLL */
+
 /*
  * Move the cursor to a given position, clipping at boundaries. We
  * may or may not want to clip at the scroll margin: marg_clip is 0
  * not to, 1 to disallow _passing_ the margins, and 2 to disallow
  * even _being_ outside the margins.
  */
-static void move(int x, int y, int marg_clip)
+static void move(Terminal *term, int x, int y, int marg_clip)
 {
     if (x < 0)
        x = 0;
-    if (x >= cols)
-       x = cols - 1;
+    if (x >= term->cols)
+       x = term->cols - 1;
     if (marg_clip) {
-       if ((curs.y >= marg_t || marg_clip == 2) && y < marg_t)
-           y = marg_t;
-       if ((curs.y <= marg_b || marg_clip == 2) && y > marg_b)
-           y = marg_b;
+       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 >= rows)
-       y = rows - 1;
-    curs.x = x;
-    curs.y = y;
+    if (y >= term->rows)
+       y = term->rows - 1;
+    term->curs.x = x;
+    term->curs.y = y;
     fix_cpos;
-    wrapnext = FALSE;
+    term->wrapnext = FALSE;
 }
 
 /*
  * Save or restore the cursor and SGR mode.
  */
-static void save_cursor(int save)
+static void save_cursor(Terminal *term, int save)
 {
     if (save) {
-       savecurs = curs;
-       save_attr = curr_attr;
-       save_cset = cset;
-       save_utf = utf;
-       save_csattr = cset_attr[cset];
-       save_sco_acs = sco_acs;
+       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 {
-       curs = savecurs;
+       term->curs = term->savecurs;
        /* Make sure the window hasn't shrunk since the save */
-       if (curs.x >= cols)
-           curs.x = cols - 1;
-       if (curs.y >= rows)
-           curs.y = rows - 1;
-
-       curr_attr = save_attr;
-       cset = save_cset;
-       utf = save_utf;
-       cset_attr[cset] = save_csattr;
-       sco_acs = save_sco_acs;
+       if (term->curs.x >= term->cols)
+           term->curs.x = term->cols - 1;
+       if (term->curs.y >= term->rows)
+           term->curs.y = term->rows - 1;
+
+       term->curr_attr = term->save_attr;
+       term->cset = term->save_cset;
+       term->utf = term->save_utf;
+       term->wrapnext = term->save_wnext;
+       /*
+        * wrapnext might reset to False if the x position is no
+        * longer at the rightmost edge.
+        */
+       if (term->wrapnext && term->curs.x < term->cols-1)
+           term->wrapnext = FALSE;
+       term->cset_attr[term->cset] = term->save_csattr;
+       term->sco_acs = term->save_sco_acs;
        fix_cpos;
-       if (use_bce)
-           erase_char = (' ' | ATTR_ASCII |
-                        (curr_attr & (ATTR_FGMASK | ATTR_BGMASK)));
+       if (term->use_bce)
+           term->erase_char = (' ' | ATTR_ASCII |
+                               (term->curr_attr &
+                                (ATTR_FGMASK | ATTR_BGMASK)));
+    }
+}
+
+/*
+ * This function is called before doing _anything_ which affects
+ * only part of a line of text. It is used to mark the boundary
+ * between two character positions, and it indicates that some sort
+ * of effect is going to happen on only one side of that boundary.
+ * 
+ * The effect of this function is to check whether a CJK
+ * double-width character is straddling the boundary, and to remove
+ * it and replace it with two spaces if so. (Of course, one or
+ * other of those spaces is then likely to be replaced with
+ * something else again, as a result of whatever happens next.)
+ * 
+ * Also, if the boundary is at the right-hand _edge_ of the screen,
+ * it implies something deliberate is being done to the rightmost
+ * column position; hence we must clear LATTR_WRAPPED2.
+ * 
+ * The input to the function is the coordinates of the _second_
+ * character of the pair.
+ */
+static void check_boundary(Terminal *term, int x, int y)
+{
+    unsigned long *ldata;
+
+    /* Validate input coordinates, just in case. */
+    if (x == 0 || x > term->cols)
+       return;
+
+    ldata = lineptr(y);
+    if (x == term->cols) {
+       ldata[x] &= ~LATTR_WRAPPED2;
+    } else {
+       if ((ldata[x] & (CHAR_MASK | CSET_MASK)) == UCSWIDE) {
+           ldata[x-1] = ldata[x] =
+               (ldata[x-1] &~ (CHAR_MASK | CSET_MASK)) | ATTR_ASCII | ' ';
+       }
     }
 }
 
@@ -727,45 +935,48 @@ static void save_cursor(int save)
  * Erase a large portion of the screen: the whole screen, or the
  * whole line, or parts thereof.
  */
-static void erase_lots(int line_only, int from_begin, int to_end)
+static void erase_lots(Terminal *term,
+                      int line_only, int from_begin, int to_end)
 {
     pos start, end;
     int erase_lattr;
     unsigned long *ldata;
 
     if (line_only) {
-       start.y = curs.y;
+       start.y = term->curs.y;
        start.x = 0;
-       end.y = curs.y + 1;
+       end.y = term->curs.y + 1;
        end.x = 0;
        erase_lattr = FALSE;
     } else {
        start.y = 0;
        start.x = 0;
-       end.y = rows;
+       end.y = term->rows;
        end.x = 0;
        erase_lattr = TRUE;
     }
     if (!from_begin) {
-       start = curs;
+       start = term->curs;
     }
     if (!to_end) {
-       end = curs;
+       end = term->curs;
        incpos(end);
     }
-    check_selection(start, 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 == rows)
-       term_invalidate();
+    if (start.y == 0 && start.x == 0 && end.y == term->rows)
+       term_invalidate(term);
 
     ldata = lineptr(start.y);
     while (poslt(start, end)) {
-       if (start.x == cols && !erase_lattr)
-           ldata[start.x] &= ~LATTR_WRAPPED;
+       if (start.x == term->cols && !erase_lattr)
+           ldata[start.x] &= ~(LATTR_WRAPPED | LATTR_WRAPPED2);
        else
-           ldata[start.x] = erase_char;
-       if (incpos(start) && start.y < rows)
+           ldata[start.x] = term->erase_char;
+       if (incpos(start) && start.y < term->rows)
            ldata = lineptr(start.y);
     }
 }
@@ -774,7 +985,7 @@ static void erase_lots(int line_only, int from_begin, int to_end)
  * Insert or delete characters within the current line. n is +ve if
  * insertion is desired, and -ve for deletion.
  */
-static void insch(int n)
+static void insch(Terminal *term, int n)
 {
     int dir = (n < 0 ? -1 : +1);
     int m;
@@ -782,21 +993,24 @@ static void insch(int n)
     unsigned long *ldata;
 
     n = (n < 0 ? -n : n);
-    if (n > cols - curs.x)
-       n = cols - curs.x;
-    m = cols - curs.x - n;
-    cursplus.y = curs.y;
-    cursplus.x = curs.x + n;
-    check_selection(curs, cursplus);
-    ldata = lineptr(curs.y);
+    if (n > term->cols - term->curs.x)
+       n = term->cols - term->curs.x;
+    m = term->cols - term->curs.x - n;
+    cursplus.y = term->curs.y;
+    cursplus.x = term->curs.x + n;
+    check_selection(term, term->curs, cursplus);
+    check_boundary(term, term->curs.x, term->curs.y);
+    if (dir < 0)
+       check_boundary(term, term->curs.x + n, term->curs.y);
+    ldata = lineptr(term->curs.y);
     if (dir < 0) {
-       memmove(ldata + curs.x, ldata + curs.x + n, m * TSIZE);
+       memmove(ldata + term->curs.x, ldata + term->curs.x + n, m * TSIZE);
        while (n--)
-           ldata[curs.x + m++] = erase_char;
+           ldata[term->curs.x + m++] = term->erase_char;
     } else {
-       memmove(ldata + curs.x + n, ldata + curs.x, m * TSIZE);
+       memmove(ldata + term->curs.x + n, ldata + term->curs.x, m * TSIZE);
        while (n--)
-           ldata[curs.x + n] = erase_char;
+           ldata[term->curs.x + n] = term->erase_char;
     }
 }
 
@@ -804,28 +1018,29 @@ static void insch(int n)
  * 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(int mode, int query, int state)
+static void toggle_mode(Terminal *term, int mode, int query, int state)
 {
-    long ticks;
+    unsigned long ticks;
 
     if (query)
        switch (mode) {
          case 1:                      /* application cursor keys */
-           app_cursor_keys = state;
+           term->app_cursor_keys = state;
            break;
          case 2:                      /* VT52 mode */
-           vt52_mode = !state;
-           if (vt52_mode) {
-               blink_is_real = FALSE;
-               vt52_bold = FALSE;
+           term->vt52_mode = !state;
+           if (term->vt52_mode) {
+               term->blink_is_real = FALSE;
+               term->vt52_bold = FALSE;
            } else {
-               blink_is_real = cfg.blinktext;
+               term->blink_is_real = term->cfg.blinktext;
            }
            break;
          case 3:                      /* 80/132 columns */
-           deselect();
-           request_resize(state ? 132 : 80, rows, 1);
-           reset_132 = state;
+           deselect(term);
+           if (!term->cfg.no_remote_resize)
+               request_resize(term->frontend, state ? 132 : 80, term->rows);
+           term->reset_132 = state;
            break;
          case 5:                      /* reverse video */
            /*
@@ -834,95 +1049,175 @@ static void toggle_mode(int mode, int query, int state)
             * effective visual bell, so that ESC[?5hESC[?5l will
             * always be an actually _visible_ visual bell.
             */
-           ticks = GetTickCount();
-           if (rvideo && !state &&    /* we're turning it off */
-               ticks < rvbell_timeout) {       /* and it's not long since it was turned on */
-               in_vbell = TRUE;       /* we may clear rvideo but we set in_vbell */
-               if (vbell_timeout < rvbell_timeout)     /* don't move vbell end forward */
-                   vbell_timeout = rvbell_timeout;     /* vbell end is at least then */
-           } else if (!rvideo && state) {
+           ticks = GETTICKCOUNT();
+           /* turn off a previous vbell to avoid inconsistencies */
+           if (ticks - term->vbell_startpoint >= VBELL_TIMEOUT)
+               term->in_vbell = FALSE;
+           if (term->rvideo && !state &&    /* we're turning it off... */
+               (ticks - term->rvbell_startpoint) < VBELL_TIMEOUT) {/*...soon*/
+               /* If there's no vbell timeout already, or this one lasts
+                * longer, replace vbell_timeout with ours. */
+               if (!term->in_vbell ||
+                   (term->rvbell_startpoint - term->vbell_startpoint <
+                    VBELL_TIMEOUT))
+                   term->vbell_startpoint = term->rvbell_startpoint;
+               term->in_vbell = TRUE; /* may clear rvideo but set in_vbell */
+           } else if (!term->rvideo && state) {
                /* This is an ON, so we notice the time and save it. */
-               rvbell_timeout = ticks + VBELL_TIMEOUT;
+               term->rvbell_startpoint = ticks;
            }
-           rvideo = state;
-           seen_disp_event = TRUE;
+           term->rvideo = state;
+           term->seen_disp_event = TRUE;
            if (state)
-               term_update();
+               term_update(term);
            break;
          case 6:                      /* DEC origin mode */
-           dec_om = state;
+           term->dec_om = state;
            break;
          case 7:                      /* auto wrap */
-           wrap = state;
+           term->wrap = state;
            break;
          case 8:                      /* auto key repeat */
-           repeat_off = !state;
+           term->repeat_off = !state;
            break;
          case 10:                     /* set local edit mode */
-           term_editing = state;
-           ldisc_send(NULL, 0);       /* cause ldisc to notice changes */
+           term->term_editing = state;
+           if (term->ldisc)           /* cause ldisc to notice changes */
+               ldisc_send(term->ldisc, NULL, 0, 0);
            break;
          case 25:                     /* enable/disable cursor */
            compatibility2(OTHER, VT220);
-           cursor_on = state;
-           seen_disp_event = TRUE;
+           term->cursor_on = state;
+           term->seen_disp_event = TRUE;
            break;
          case 47:                     /* alternate screen */
            compatibility(OTHER);
-           deselect();
-           swap_screen(state);
-           disptop = 0;
+           deselect(term);
+           swap_screen(term, term->cfg.no_alt_screen ? 0 : state, FALSE, FALSE);
+           term->disptop = 0;
            break;
          case 1000:                   /* xterm mouse 1 */
-           xterm_mouse = state ? 1 : 0;
-           set_raw_mouse_mode(state);
+           term->xterm_mouse = state ? 1 : 0;
+           set_raw_mouse_mode(term->frontend, state);
            break;
          case 1002:                   /* xterm mouse 2 */
-           xterm_mouse = state ? 2 : 0;
-           set_raw_mouse_mode(state);
+           term->xterm_mouse = state ? 2 : 0;
+           set_raw_mouse_mode(term->frontend, state);
+           break;
+         case 1047:                   /* alternate screen */
+           compatibility(OTHER);
+           deselect(term);
+           swap_screen(term, term->cfg.no_alt_screen ? 0 : state, TRUE, TRUE);
+           term->disptop = 0;
+           break;
+         case 1048:                   /* save/restore cursor */
+           save_cursor(term, state);
+           if (!state) term->seen_disp_event = TRUE;
+           break;
+         case 1049:                   /* cursor & alternate screen */
+           if (state)
+               save_cursor(term, state);
+           if (!state) term->seen_disp_event = TRUE;
+           compatibility(OTHER);
+           deselect(term);
+           swap_screen(term, term->cfg.no_alt_screen ? 0 : state, TRUE, FALSE);
+           if (!state)
+               save_cursor(term, state);
+           term->disptop = 0;
            break;
     } else
        switch (mode) {
          case 4:                      /* set insert mode */
            compatibility(VT102);
-           insert = state;
+           term->insert = state;
            break;
          case 12:                     /* set echo mode */
-           term_echoing = !state;
-           ldisc_send(NULL, 0);       /* cause ldisc to notice changes */
+           term->term_echoing = !state;
+           if (term->ldisc)           /* cause ldisc to notice changes */
+               ldisc_send(term->ldisc, NULL, 0, 0);
            break;
          case 20:                     /* Return sends ... */
-           cr_lf_return = state;
+           term->cr_lf_return = state;
            break;
          case 34:                     /* Make cursor BIG */
            compatibility2(OTHER, VT220);
-           big_cursor = !state;
+           term->big_cursor = !state;
        }
 }
 
 /*
  * Process an OSC sequence: set window title or icon name.
  */
-static void do_osc(void)
+static void do_osc(Terminal *term)
 {
-    if (osc_w) {
-       while (osc_strlen--)
-           wordness[(unsigned char) osc_string[osc_strlen]] = esc_args[0];
+    if (term->osc_w) {
+       while (term->osc_strlen--)
+           term->wordness[(unsigned char)
+               term->osc_string[term->osc_strlen]] = term->esc_args[0];
     } else {
-       osc_string[osc_strlen] = '\0';
-       switch (esc_args[0]) {
+       term->osc_string[term->osc_strlen] = '\0';
+       switch (term->esc_args[0]) {
          case 0:
          case 1:
-           set_icon(osc_string);
-           if (esc_args[0] == 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:
-           set_title(osc_string);
+           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;
 }
 
 /*
@@ -930,50 +1225,104 @@ static void do_osc(void)
  * in-memory display. There's a big state machine in here to
  * process escape sequences...
  */
-void term_out(void)
+void term_out(Terminal *term)
 {
-    int c, inbuf_reap;
-
-    for (inbuf_reap = 0; inbuf_reap < inbuf_head; inbuf_reap++) {
-       c = inbuf[inbuf_reap];
+    int c, unget;
+    unsigned char localbuf[256], *chars;
+    int nchars = 0;
+
+    unget = -1;
+
+    chars = NULL;                     /* placate compiler warnings */
+    while (nchars > 0 || bufchain_size(&term->inbuf) > 0) {
+       if (unget == -1) {
+           if (nchars == 0) {
+               void *ret;
+               bufchain_prefix(&term->inbuf, &ret, &nchars);
+               if (nchars > sizeof(localbuf))
+                   nchars = sizeof(localbuf);
+               memcpy(localbuf, ret, nchars);
+               bufchain_consume(&term->inbuf, nchars);
+               chars = localbuf;
+               assert(chars != NULL);
+           }
+           c = *chars++;
+           nchars--;
 
-       /*
-        * Optionally log the session traffic to a file. Useful for
-        * debugging and possibly also useful for actual logging.
-        */
-       logtraffic((unsigned char) c, LGTYP_DEBUG);
+           /*
+            * 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 (termstate == TOPLEVEL) {
-           if (in_utf)
-               switch (utf_state) {
+       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 (unitab_ctrl[c] != 0xFF) 
-                            c = unitab_ctrl[c];
+                       if (term->ucsdata->unitab_ctrl[c] != 0xFF) 
+                            c = term->ucsdata->unitab_ctrl[c];
                        else c = ((unsigned char)c) | ATTR_ASCII;
                        break;
                    } else if ((c & 0xe0) == 0xc0) {
-                       utf_size = utf_state = 1;
-                       utf_char = (c & 0x1f);
+                       term->utf_size = term->utf_state = 1;
+                       term->utf_char = (c & 0x1f);
                    } else if ((c & 0xf0) == 0xe0) {
-                       utf_size = utf_state = 2;
-                       utf_char = (c & 0x0f);
+                       term->utf_size = term->utf_state = 2;
+                       term->utf_char = (c & 0x0f);
                    } else if ((c & 0xf8) == 0xf0) {
-                       utf_size = utf_state = 3;
-                       utf_char = (c & 0x07);
+                       term->utf_size = term->utf_state = 3;
+                       term->utf_char = (c & 0x07);
                    } else if ((c & 0xfc) == 0xf8) {
-                       utf_size = utf_state = 4;
-                       utf_char = (c & 0x03);
+                       term->utf_size = term->utf_state = 4;
+                       term->utf_char = (c & 0x03);
                    } else if ((c & 0xfe) == 0xfc) {
-                       utf_size = utf_state = 5;
-                       utf_char = (c & 0x01);
+                       term->utf_size = term->utf_state = 5;
+                       term->utf_char = (c & 0x01);
                    } else {
                        c = UCSERR;
                        break;
@@ -985,23 +1334,23 @@ void term_out(void)
                  case 4:
                  case 5:
                    if ((c & 0xC0) != 0x80) {
-                       inbuf_reap--;  /* This causes the faulting character */
-                       c = UCSERR;    /* to be logged twice - not really a */
-                       utf_state = 0; /* serious problem. */
+                       unget = c;
+                       c = UCSERR;
+                       term->utf_state = 0;
                        break;
                    }
-                   utf_char = (utf_char << 6) | (c & 0x3f);
-                   if (--utf_state)
+                   term->utf_char = (term->utf_char << 6) | (c & 0x3f);
+                   if (--term->utf_state)
                        continue;
 
-                   c = utf_char;
+                   c = term->utf_char;
 
                    /* Is somebody trying to be evil! */
                    if (c < 0x80 ||
-                       (c < 0x800 && utf_size >= 2) ||
-                       (c < 0x10000 && utf_size >= 3) ||
-                       (c < 0x200000 && utf_size >= 4) ||
-                       (c < 0x4000000 && utf_size >= 5))
+                       (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 */
@@ -1039,13 +1388,13 @@ void term_out(void)
                    break;
            }
            /* Are we in the nasty ACS mode? Note: no sco in utf mode. */
-           else if(sco_acs && 
-                   (c!='\033' && c!='\n' && c!='\r' && c!='\b'))
+           else if(term->sco_acs && 
+                   (c!='\033' && c!='\012' && c!='\015' && c!='\b'))
            {
-              if (sco_acs == 2) c ^= 0x80;
+              if (term->sco_acs == 2) c |= 0x80;
               c |= ATTR_SCOACS;
            } else {
-               switch (cset_attr[cset]) {
+               switch (term->cset_attr[term->cset]) {
                    /* 
                     * Linedraw characters are different from 'ESC ( B'
                     * only for a small range. For ones outside that
@@ -1053,8 +1402,8 @@ void term_out(void)
                     * the same encoding.
                     */
                  case ATTR_LINEDRW:
-                   if (unitab_ctrl[c] != 0xFF)
-                       c = unitab_ctrl[c];
+                   if (term->ucsdata->unitab_ctrl[c] != 0xFF)
+                       c = term->ucsdata->unitab_ctrl[c];
                    else
                        c = ((unsigned char) c) | ATTR_LINEDRW;
                    break;
@@ -1066,8 +1415,8 @@ void term_out(void)
                        break;
                    }
                  /*FALLTHROUGH*/ case ATTR_ASCII:
-                   if (unitab_ctrl[c] != 0xFF)
-                       c = unitab_ctrl[c];
+                   if (term->ucsdata->unitab_ctrl[c] != 0xFF)
+                       c = term->ucsdata->unitab_ctrl[c];
                    else
                        c = ((unsigned char) c) | ATTR_ASCII;
                    break;
@@ -1079,23 +1428,24 @@ void term_out(void)
        }
 
        /* How about C1 controls ? */
-       if ((c & -32) == 0x80 && termstate < DO_CTRLS && !vt52_mode &&
-           has_compat(VT220)) {
-           termstate = SEEN_ESC;
-           esc_query = FALSE;
+       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' && termstate < DO_CTRLS && has_compat(OTHER)) {
-           if (curs.x && !wrapnext)
-               curs.x--;
-           wrapnext = FALSE;
+       if (c == '\177' && term->termstate < DO_CTRLS && has_compat(OTHER)) {
+           if (term->curs.x && !term->wrapnext)
+               term->curs.x--;
+           term->wrapnext = FALSE;
            fix_cpos;
-           *cpos = (' ' | curr_attr | ATTR_ASCII);
+           if (!term->cfg.no_dbackspace)    /* destructive bksp might be disabled */
+               *term->cpos = (' ' | term->curr_attr | ATTR_ASCII);
        } else
            /* Or normal C0 controls. */
-       if ((c & -32) == 0 && termstate < DO_CTRLS) {
+       if ((c & -32) == 0 && term->termstate < DO_CTRLS) {
            switch (c) {
              case '\005':             /* terminal type query */
                /* Strictly speaking this is VT100 but a VT100 defaults to
@@ -1107,10 +1457,10 @@ void term_out(void)
                 * An xterm returns "xterm" (5 characters)
                 */
                compatibility(ANSIMIN);
-               {
+               if (term->ldisc) {
                    char abuf[256], *s, *d;
                    int state = 0;
-                   for (s = cfg.answerback, d = abuf; *s; s++) {
+                   for (s = term->cfg.answerback, d = abuf; *s; s++) {
                        if (state) {
                            if (*s >= 'a' && *s <= 'z')
                                *d++ = (*s - ('a' - 1));
@@ -1125,183 +1475,190 @@ void term_out(void)
                        } else
                            *d++ = *s;
                    }
-                   lpage_send(CP_ACP, abuf, d - abuf);
+                   lpage_send(term->ldisc, DEFAULT_CODEPAGE,
+                              abuf, d - abuf, 0);
                }
                break;
              case '\007':
                {
                    struct beeptime *newbeep;
-                   long ticks;
+                   unsigned long ticks;
 
-                   ticks = GetTickCount();
+                   ticks = GETTICKCOUNT();
 
-                   if (!beep_overloaded) {
+                   if (!term->beep_overloaded) {
                        newbeep = smalloc(sizeof(struct beeptime));
                        newbeep->ticks = ticks;
                        newbeep->next = NULL;
-                       if (!beephead)
-                           beephead = newbeep;
+                       if (!term->beephead)
+                           term->beephead = newbeep;
                        else
-                           beeptail->next = newbeep;
-                       beeptail = newbeep;
-                       nbeeps++;
+                           term->beeptail->next = newbeep;
+                       term->beeptail = newbeep;
+                       term->nbeeps++;
                    }
 
                    /*
                     * Throw out any beeps that happened more than
                     * t seconds ago.
                     */
-                   while (beephead &&
-                          beephead->ticks < ticks - cfg.bellovl_t) {
-                       struct beeptime *tmp = beephead;
-                       beephead = tmp->next;
+                   while (term->beephead &&
+                          term->beephead->ticks < ticks - term->cfg.bellovl_t) {
+                       struct beeptime *tmp = term->beephead;
+                       term->beephead = tmp->next;
                        sfree(tmp);
-                       if (!beephead)
-                           beeptail = NULL;
-                       nbeeps--;
+                       if (!term->beephead)
+                           term->beeptail = NULL;
+                       term->nbeeps--;
                    }
 
-                   if (cfg.bellovl && beep_overloaded &&
-                       ticks - lastbeep >= cfg.bellovl_s) {
+                   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.
                         */
-                       beep_overloaded = FALSE;
-                   } else if (cfg.bellovl && !beep_overloaded &&
-                              nbeeps >= cfg.bellovl_n) {
+                       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.
                         */
-                       beep_overloaded = TRUE;
+                       term->beep_overloaded = TRUE;
                    }
-                   lastbeep = ticks;
+                   term->lastbeep = ticks;
 
                    /*
                     * Perform an actual beep if we're not overloaded.
                     */
-                   if (!cfg.bellovl || !beep_overloaded) {
-                       beep(cfg.beep);
-                       if (cfg.beep == BELL_VISUAL) {
-                           in_vbell = TRUE;
-                           vbell_timeout = ticks + VBELL_TIMEOUT;
-                           term_update();
+                   if (!term->cfg.bellovl || !term->beep_overloaded) {
+                       beep(term->frontend, term->cfg.beep);
+                       if (term->cfg.beep == BELL_VISUAL) {
+                           term->in_vbell = TRUE;
+                           term->vbell_startpoint = ticks;
+                           term_update(term);
                        }
                    }
-                   disptop = 0;
+                   term->disptop = 0;
                }
                break;
              case '\b':
-               if (curs.x == 0 && (curs.y == 0 || wrap == 0));
-               else if (curs.x == 0 && curs.y > 0)
-                   curs.x = cols - 1, curs.y--;
-               else if (wrapnext)
-                   wrapnext = FALSE;
+               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
-                   curs.x--;
+                   term->curs.x--;
                fix_cpos;
-               seen_disp_event = TRUE;
+               term->seen_disp_event = TRUE;
                break;
              case '\016':
                compatibility(VT100);
-               cset = 1;
+               term->cset = 1;
                break;
              case '\017':
                compatibility(VT100);
-               cset = 0;
+               term->cset = 0;
                break;
              case '\033':
-               if (vt52_mode)
-                   termstate = VT52_ESC;
+               if (term->vt52_mode)
+                   term->termstate = VT52_ESC;
                else {
                    compatibility(ANSIMIN);
-                   termstate = SEEN_ESC;
-                   esc_query = FALSE;
+                   term->termstate = SEEN_ESC;
+                   term->esc_query = FALSE;
                }
                break;
-             case '\r':
-               curs.x = 0;
-               wrapnext = FALSE;
+             case '\015':
+               term->curs.x = 0;
+               term->wrapnext = FALSE;
                fix_cpos;
-               seen_disp_event = TRUE;
-               paste_hold = 0;
-               logtraffic((unsigned char) c, LGTYP_ASCII);
+               term->seen_disp_event = TRUE;
+               term->paste_hold = 0;
+               if (term->logctx)
+                   logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
                break;
              case '\014':
                if (has_compat(SCOANSI)) {
-                   move(0, 0, 0);
-                   erase_lots(FALSE, FALSE, TRUE);
-                   disptop = 0;
-                   wrapnext = FALSE;
-                   seen_disp_event = 1;
+                   move(term, 0, 0, 0);
+                   erase_lots(term, FALSE, FALSE, TRUE);
+                   term->disptop = 0;
+                   term->wrapnext = FALSE;
+                   term->seen_disp_event = 1;
                    break;
                }
              case '\013':
                compatibility(VT100);
-             case '\n':
-               if (curs.y == marg_b)
-                   scroll(marg_t, marg_b, 1, TRUE);
-               else if (curs.y < rows - 1)
-                   curs.y++;
-               if (cfg.lfhascr)
-                   curs.x = 0;
+             case '\012':
+               if (term->curs.y == term->marg_b)
+                   scroll(term, term->marg_t, term->marg_b, 1, TRUE);
+               else if (term->curs.y < term->rows - 1)
+                   term->curs.y++;
+               if (term->cfg.lfhascr)
+                   term->curs.x = 0;
                fix_cpos;
-               wrapnext = FALSE;
-               seen_disp_event = 1;
-               paste_hold = 0;
-               logtraffic((unsigned char) c, LGTYP_ASCII);
+               term->wrapnext = FALSE;
+               term->seen_disp_event = 1;
+               term->paste_hold = 0;
+               if (term->logctx)
+                   logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
                break;
              case '\t':
                {
-                   pos old_curs = curs;
-                   unsigned long *ldata = lineptr(curs.y);
+                   pos old_curs = term->curs;
+                   unsigned long *ldata = lineptr(term->curs.y);
 
                    do {
-                       curs.x++;
-                   } while (curs.x < cols - 1 && !tabs[curs.x]);
+                       term->curs.x++;
+                   } while (term->curs.x < term->cols - 1 &&
+                            !term->tabs[term->curs.x]);
 
-                   if ((ldata[cols] & LATTR_MODE) != LATTR_NORM) {
-                       if (curs.x >= cols / 2)
-                           curs.x = cols / 2 - 1;
+                   if ((ldata[term->cols] & LATTR_MODE) != LATTR_NORM) {
+                       if (term->curs.x >= term->cols / 2)
+                           term->curs.x = term->cols / 2 - 1;
                    } else {
-                       if (curs.x >= cols)
-                           curs.x = cols - 1;
+                       if (term->curs.x >= term->cols)
+                           term->curs.x = term->cols - 1;
                    }
 
                    fix_cpos;
-                   check_selection(old_curs, curs);
+                   check_selection(term, old_curs, term->curs);
                }
-               seen_disp_event = TRUE;
+               term->seen_disp_event = TRUE;
                break;
            }
        } else
-           switch (termstate) {
+           switch (term->termstate) {
              case TOPLEVEL:
-               /* Only graphic characters get this far, ctrls are stripped above */
-               if (wrapnext && wrap) {
-                   cpos[1] |= LATTR_WRAPPED;
-                   if (curs.y == marg_b)
-                       scroll(marg_t, marg_b, 1, TRUE);
-                   else if (curs.y < rows - 1)
-                       curs.y++;
-                   curs.x = 0;
+               /* Only graphic characters get this far;
+                * ctrls are stripped above */
+               if (term->wrapnext && term->wrap) {
+                   term->cpos[1] |= LATTR_WRAPPED;
+                   if (term->curs.y == term->marg_b)
+                       scroll(term, term->marg_t, term->marg_b, 1, TRUE);
+                   else if (term->curs.y < term->rows - 1)
+                       term->curs.y++;
+                   term->curs.x = 0;
                    fix_cpos;
-                   wrapnext = FALSE;
+                   term->wrapnext = FALSE;
                }
-               if (insert)
-                   insch(1);
-               if (selstate != NO_SELECTION) {
-                   pos cursplus = curs;
+               if (term->insert)
+                   insch(term, 1);
+               if (term->selstate != NO_SELECTION) {
+                   pos cursplus = term->curs;
                    incpos(cursplus);
-                   check_selection(curs, cursplus);
+                   check_selection(term, term->curs, cursplus);
                }
-               if ((c & CSET_MASK) == ATTR_ASCII || (c & CSET_MASK) == 0)
-                   logtraffic((unsigned char) c, LGTYP_ASCII);
+               if (((c & CSET_MASK) == ATTR_ASCII || (c & CSET_MASK) == 0) &&
+                   term->logctx)
+                   logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
                {
-                   extern int wcwidth(wchar_t ucs);
                    int width = 0;
                    if (DIRECT_CHAR(c))
                        width = 1;
@@ -1309,36 +1666,71 @@ void term_out(void)
                        width = wcwidth((wchar_t) c);
                    switch (width) {
                      case 2:
-                       if (curs.x + 1 != cols) {
-                           *cpos++ = c | ATTR_WIDE | curr_attr;
-                           *cpos++ = UCSWIDE | curr_attr;
-                           curs.x++;
-                           break;
+                       /*
+                        * If we're about to display a double-width
+                        * character starting in the rightmost
+                        * column, then we do something special
+                        * instead. We must print a space in the
+                        * last column of the screen, then wrap;
+                        * and we also set LATTR_WRAPPED2 which
+                        * instructs subsequent cut-and-pasting not
+                        * only to splice this line to the one
+                        * after it, but to ignore the space in the
+                        * last character position as well.
+                        * (Because what was actually output to the
+                        * terminal was presumably just a sequence
+                        * of CJK characters, and we don't want a
+                        * space to be pasted in the middle of
+                        * those just because they had the
+                        * misfortune to start in the wrong parity
+                        * column. xterm concurs.)
+                        */
+                       check_boundary(term, term->curs.x, term->curs.y);
+                       check_boundary(term, term->curs.x+2, term->curs.y);
+                       if (term->curs.x == term->cols-1) {
+                           *term->cpos++ = ATTR_ASCII | ' ' | term->curr_attr;
+                           *term->cpos |= LATTR_WRAPPED | LATTR_WRAPPED2;
+                           if (term->curs.y == term->marg_b)
+                               scroll(term, term->marg_t, term->marg_b,
+                                      1, TRUE);
+                           else if (term->curs.y < term->rows - 1)
+                               term->curs.y++;
+                           term->curs.x = 0;
+                           fix_cpos;
+                           /* Now we must check_boundary again, of course. */
+                           check_boundary(term, term->curs.x, term->curs.y);
+                           check_boundary(term, term->curs.x+2, term->curs.y);
                        }
+                       *term->cpos++ = c | term->curr_attr;
+                       *term->cpos++ = UCSWIDE | term->curr_attr;
+                       term->curs.x++;
+                       break;
                      case 1:
-                       *cpos++ = c | curr_attr;
+                       check_boundary(term, term->curs.x, term->curs.y);
+                       check_boundary(term, term->curs.x+1, term->curs.y);
+                       *term->cpos++ = c | term->curr_attr;
                        break;
                      default:
                        continue;
                    }
                }
-               curs.x++;
-               if (curs.x == cols) {
-                   cpos--;
-                   curs.x--;
-                   wrapnext = TRUE;
-                   if (wrap && vt52_mode) {
-                       cpos[1] |= LATTR_WRAPPED;
-                       if (curs.y == marg_b)
-                           scroll(marg_t, marg_b, 1, TRUE);
-                       else if (curs.y < rows - 1)
-                           curs.y++;
-                       curs.x = 0;
+               term->curs.x++;
+               if (term->curs.x == term->cols) {
+                   term->cpos--;
+                   term->curs.x--;
+                   term->wrapnext = TRUE;
+                   if (term->wrap && term->vt52_mode) {
+                       term->cpos[1] |= LATTR_WRAPPED;
+                       if (term->curs.y == term->marg_b)
+                           scroll(term, term->marg_t, term->marg_b, 1, TRUE);
+                       else if (term->curs.y < term->rows - 1)
+                           term->curs.y++;
+                       term->curs.x = 0;
                        fix_cpos;
-                       wrapnext = FALSE;
+                       term->wrapnext = FALSE;
                    }
                }
-               seen_disp_event = 1;
+               term->seen_disp_event = 1;
                break;
 
              case OSC_MAYBE_ST:
@@ -1348,99 +1740,104 @@ void term_out(void)
                 * and _if_ we see a backslash, we process it.
                 */
                if (c == '\\') {
-                   do_osc();
-                   termstate = TOPLEVEL;
+                   do_osc(term);
+                   term->termstate = TOPLEVEL;
                    break;
                }
                /* else fall through */
              case SEEN_ESC:
                if (c >= ' ' && c <= '/') {
-                   if (esc_query)
-                       esc_query = -1;
+                   if (term->esc_query)
+                       term->esc_query = -1;
                    else
-                       esc_query = c;
+                       term->esc_query = c;
                    break;
                }
-               termstate = TOPLEVEL;
-               switch (ANSI(c, esc_query)) {
+               term->termstate = TOPLEVEL;
+               switch (ANSI(c, term->esc_query)) {
                  case '[':            /* enter CSI mode */
-                   termstate = SEEN_CSI;
-                   esc_nargs = 1;
-                   esc_args[0] = ARG_DEFAULT;
-                   esc_query = FALSE;
+                   term->termstate = SEEN_CSI;
+                   term->esc_nargs = 1;
+                   term->esc_args[0] = ARG_DEFAULT;
+                   term->esc_query = FALSE;
                    break;
                  case ']':            /* xterm escape sequences */
                    /* Compatibility is nasty here, xterm, linux, decterm yuk! */
                    compatibility(OTHER);
-                   termstate = SEEN_OSC;
-                   esc_args[0] = 0;
+                   term->termstate = SEEN_OSC;
+                   term->esc_args[0] = 0;
                    break;
                  case '7':            /* save cursor */
                    compatibility(VT100);
-                   save_cursor(TRUE);
+                   save_cursor(term, TRUE);
                    break;
                  case '8':            /* restore cursor */
                    compatibility(VT100);
-                   save_cursor(FALSE);
-                   seen_disp_event = TRUE;
+                   save_cursor(term, FALSE);
+                   term->seen_disp_event = TRUE;
                    break;
                  case '=':
                    compatibility(VT100);
-                   app_keypad_keys = TRUE;
+                   term->app_keypad_keys = TRUE;
                    break;
                  case '>':
                    compatibility(VT100);
-                   app_keypad_keys = FALSE;
+                   term->app_keypad_keys = FALSE;
                    break;
                  case 'D':            /* exactly equivalent to LF */
                    compatibility(VT100);
-                   if (curs.y == marg_b)
-                       scroll(marg_t, marg_b, 1, TRUE);
-                   else if (curs.y < rows - 1)
-                       curs.y++;
+                   if (term->curs.y == term->marg_b)
+                       scroll(term, term->marg_t, term->marg_b, 1, TRUE);
+                   else if (term->curs.y < term->rows - 1)
+                       term->curs.y++;
                    fix_cpos;
-                   wrapnext = FALSE;
-                   seen_disp_event = TRUE;
+                   term->wrapnext = FALSE;
+                   term->seen_disp_event = TRUE;
                    break;
                  case 'E':            /* exactly equivalent to CR-LF */
                    compatibility(VT100);
-                   curs.x = 0;
-                   if (curs.y == marg_b)
-                       scroll(marg_t, marg_b, 1, TRUE);
-                   else if (curs.y < rows - 1)
-                       curs.y++;
+                   term->curs.x = 0;
+                   if (term->curs.y == term->marg_b)
+                       scroll(term, term->marg_t, term->marg_b, 1, TRUE);
+                   else if (term->curs.y < term->rows - 1)
+                       term->curs.y++;
                    fix_cpos;
-                   wrapnext = FALSE;
-                   seen_disp_event = TRUE;
+                   term->wrapnext = FALSE;
+                   term->seen_disp_event = TRUE;
                    break;
                  case 'M':            /* reverse index - backwards LF */
                    compatibility(VT100);
-                   if (curs.y == marg_t)
-                       scroll(marg_t, marg_b, -1, TRUE);
-                   else if (curs.y > 0)
-                       curs.y--;
+                   if (term->curs.y == term->marg_t)
+                       scroll(term, term->marg_t, term->marg_b, -1, TRUE);
+                   else if (term->curs.y > 0)
+                       term->curs.y--;
                    fix_cpos;
-                   wrapnext = FALSE;
-                   seen_disp_event = TRUE;
+                   term->wrapnext = FALSE;
+                   term->seen_disp_event = TRUE;
                    break;
                  case 'Z':            /* terminal type query */
                    compatibility(VT100);
-                   ldisc_send(id_string, strlen(id_string));
+                   if (term->ldisc)
+                       ldisc_send(term->ldisc, term->id_string,
+                                  strlen(term->id_string), 0);
                    break;
                  case 'c':            /* restore power-on settings */
                    compatibility(VT100);
-                   power_on();
-                   if (reset_132) {
-                       request_resize(80, rows, 1);
-                       reset_132 = 0;
+                   power_on(term);
+                   if (term->ldisc)   /* cause ldisc to notice changes */
+                       ldisc_send(term->ldisc, NULL, 0, 0);
+                   if (term->reset_132) {
+                       if (!term->cfg.no_remote_resize)
+                           request_resize(term->frontend, 80, term->rows);
+                       term->reset_132 = 0;
                    }
                    fix_cpos;
-                   disptop = 0;
-                   seen_disp_event = TRUE;
+                   term->disptop = 0;
+                   term->seen_disp_event = TRUE;
                    break;
                  case 'H':            /* set a tab */
                    compatibility(VT100);
-                   tabs[curs.x] = TRUE;
+                   term->tabs[term->curs.x] = TRUE;
                    break;
 
                  case ANSI('8', '#'):  /* ESC # 8 fills screen with Es :-) */
@@ -1450,18 +1847,18 @@ void term_out(void)
                        int i, j;
                        pos scrtop, scrbot;
 
-                       for (i = 0; i < rows; i++) {
+                       for (i = 0; i < term->rows; i++) {
                            ldata = lineptr(i);
-                           for (j = 0; j < cols; j++)
+                           for (j = 0; j < term->cols; j++)
                                ldata[j] = ATTR_DEFAULT | 'E';
-                           ldata[cols] = 0;
+                           ldata[term->cols] = 0;
                        }
-                       disptop = 0;
-                       seen_disp_event = TRUE;
+                       term->disptop = 0;
+                       term->seen_disp_event = TRUE;
                        scrtop.x = scrtop.y = 0;
                        scrbot.x = 0;
-                       scrbot.y = rows;
-                       check_selection(scrtop, scrbot);
+                       scrbot.y = term->rows;
+                       check_selection(term, scrtop, scrbot);
                    }
                    break;
 
@@ -1473,7 +1870,7 @@ void term_out(void)
                    {
                        unsigned long nlattr;
                        unsigned long *ldata;
-                       switch (ANSI(c, esc_query)) {
+                       switch (ANSI(c, term->esc_query)) {
                          case ANSI('3', '#'):
                            nlattr = LATTR_TOP;
                            break;
@@ -1487,202 +1884,225 @@ void term_out(void)
                            nlattr = LATTR_WIDE;
                            break;
                        }
-                       ldata = lineptr(curs.y);
-                       ldata[cols] &= ~LATTR_MODE;
-                       ldata[cols] |= nlattr;
+                       ldata = lineptr(term->curs.y);
+                       ldata[term->cols] &= ~LATTR_MODE;
+                       ldata[term->cols] |= nlattr;
                    }
                    break;
 
                  case ANSI('A', '('):
                    compatibility(VT100);
-                   cset_attr[0] = ATTR_GBCHR;
+                   if (!term->cfg.no_remote_charset)
+                       term->cset_attr[0] = ATTR_GBCHR;
                    break;
                  case ANSI('B', '('):
                    compatibility(VT100);
-                   cset_attr[0] = ATTR_ASCII;
+                   if (!term->cfg.no_remote_charset)
+                       term->cset_attr[0] = ATTR_ASCII;
                    break;
                  case ANSI('0', '('):
                    compatibility(VT100);
-                   cset_attr[0] = ATTR_LINEDRW;
+                   if (!term->cfg.no_remote_charset)
+                       term->cset_attr[0] = ATTR_LINEDRW;
                    break;
                  case ANSI('U', '('): 
                    compatibility(OTHER);
-                   cset_attr[0] = ATTR_SCOACS; 
+                   if (!term->cfg.no_remote_charset)
+                       term->cset_attr[0] = ATTR_SCOACS; 
                    break;
 
                  case ANSI('A', ')'):
                    compatibility(VT100);
-                   cset_attr[1] = ATTR_GBCHR;
+                   if (!term->cfg.no_remote_charset)
+                       term->cset_attr[1] = ATTR_GBCHR;
                    break;
                  case ANSI('B', ')'):
                    compatibility(VT100);
-                   cset_attr[1] = ATTR_ASCII;
+                   if (!term->cfg.no_remote_charset)
+                       term->cset_attr[1] = ATTR_ASCII;
                    break;
                  case ANSI('0', ')'):
                    compatibility(VT100);
-                   cset_attr[1] = ATTR_LINEDRW;
+                   if (!term->cfg.no_remote_charset)
+                       term->cset_attr[1] = ATTR_LINEDRW;
                    break;
                  case ANSI('U', ')'): 
                    compatibility(OTHER);
-                   cset_attr[1] = ATTR_SCOACS; 
+                   if (!term->cfg.no_remote_charset)
+                       term->cset_attr[1] = ATTR_SCOACS; 
                    break;
 
                  case ANSI('8', '%'):  /* Old Linux code */
                  case ANSI('G', '%'):
                    compatibility(OTHER);
-                   utf = 1;
+                   if (!term->cfg.no_remote_charset)
+                       term->utf = 1;
                    break;
                  case ANSI('@', '%'):
                    compatibility(OTHER);
-                   utf = 0;
+                   if (!term->cfg.no_remote_charset)
+                       term->utf = 0;
                    break;
                }
                break;
              case SEEN_CSI:
-               termstate = TOPLEVEL;  /* default */
+               term->termstate = TOPLEVEL;  /* default */
                if (isdigit(c)) {
-                   if (esc_nargs <= ARGS_MAX) {
-                       if (esc_args[esc_nargs - 1] == ARG_DEFAULT)
-                           esc_args[esc_nargs - 1] = 0;
-                       esc_args[esc_nargs - 1] =
-                           10 * esc_args[esc_nargs - 1] + c - '0';
+                   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';
                    }
-                   termstate = SEEN_CSI;
+                   term->termstate = SEEN_CSI;
                } else if (c == ';') {
-                   if (++esc_nargs <= ARGS_MAX)
-                       esc_args[esc_nargs - 1] = ARG_DEFAULT;
-                   termstate = SEEN_CSI;
+                   if (++term->esc_nargs <= ARGS_MAX)
+                       term->esc_args[term->esc_nargs - 1] = ARG_DEFAULT;
+                   term->termstate = SEEN_CSI;
                } else if (c < '@') {
-                   if (esc_query)
-                       esc_query = -1;
+                   if (term->esc_query)
+                       term->esc_query = -1;
                    else if (c == '?')
-                       esc_query = TRUE;
+                       term->esc_query = TRUE;
                    else
-                       esc_query = c;
-                   termstate = SEEN_CSI;
+                       term->esc_query = c;
+                   term->termstate = SEEN_CSI;
                } else
-                   switch (ANSI(c, esc_query)) {
+                   switch (ANSI(c, term->esc_query)) {
                      case 'A':       /* move up N lines */
-                       move(curs.x, curs.y - def(esc_args[0], 1), 1);
-                       seen_disp_event = TRUE;
+                       move(term, term->curs.x,
+                            term->curs.y - def(term->esc_args[0], 1), 1);
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'e':       /* move down N lines */
                        compatibility(ANSI);
                        /* FALLTHROUGH */
                      case 'B':
-                       move(curs.x, curs.y + def(esc_args[0], 1), 1);
-                       seen_disp_event = TRUE;
+                       move(term, term->curs.x,
+                            term->curs.y + def(term->esc_args[0], 1), 1);
+                       term->seen_disp_event = TRUE;
                        break;
                      case ANSI('c', '>'):      /* report xterm version */
                        compatibility(OTHER);
                        /* this reports xterm version 136 so that VIM can
                           use the drag messages from the mouse reporting */
-                       ldisc_send("\033[>0;136;0c", 11);
+                       if (term->ldisc)
+                           ldisc_send(term->ldisc, "\033[>0;136;0c", 11, 0);
                        break;
                      case 'a':       /* move right N cols */
                        compatibility(ANSI);
                        /* FALLTHROUGH */
                      case 'C':
-                       move(curs.x + def(esc_args[0], 1), curs.y, 1);
-                       seen_disp_event = TRUE;
+                       move(term, term->curs.x + def(term->esc_args[0], 1),
+                            term->curs.y, 1);
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'D':       /* move left N cols */
-                       move(curs.x - def(esc_args[0], 1), curs.y, 1);
-                       seen_disp_event = TRUE;
+                       move(term, term->curs.x - def(term->esc_args[0], 1),
+                            term->curs.y, 1);
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'E':       /* move down N lines and CR */
                        compatibility(ANSI);
-                       move(0, curs.y + def(esc_args[0], 1), 1);
-                       seen_disp_event = TRUE;
+                       move(term, 0,
+                            term->curs.y + def(term->esc_args[0], 1), 1);
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'F':       /* move up N lines and CR */
                        compatibility(ANSI);
-                       move(0, curs.y - def(esc_args[0], 1), 1);
-                       seen_disp_event = TRUE;
+                       move(term, 0,
+                            term->curs.y - def(term->esc_args[0], 1), 1);
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'G':
                      case '`':       /* set horizontal posn */
                        compatibility(ANSI);
-                       move(def(esc_args[0], 1) - 1, curs.y, 0);
-                       seen_disp_event = TRUE;
+                       move(term, def(term->esc_args[0], 1) - 1,
+                            term->curs.y, 0);
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'd':       /* set vertical posn */
                        compatibility(ANSI);
-                       move(curs.x,
-                            (dec_om ? marg_t : 0) + def(esc_args[0],
-                                                        1) - 1,
-                            (dec_om ? 2 : 0));
-                       seen_disp_event = TRUE;
+                       move(term, term->curs.x,
+                            ((term->dec_om ? term->marg_t : 0) +
+                             def(term->esc_args[0], 1) - 1),
+                            (term->dec_om ? 2 : 0));
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'H':
                      case 'f':       /* set horz and vert posns at once */
-                       if (esc_nargs < 2)
-                           esc_args[1] = ARG_DEFAULT;
-                       move(def(esc_args[1], 1) - 1,
-                            (dec_om ? marg_t : 0) + def(esc_args[0],
-                                                        1) - 1,
-                            (dec_om ? 2 : 0));
-                       seen_disp_event = TRUE;
+                       if (term->esc_nargs < 2)
+                           term->esc_args[1] = ARG_DEFAULT;
+                       move(term, def(term->esc_args[1], 1) - 1,
+                            ((term->dec_om ? term->marg_t : 0) +
+                             def(term->esc_args[0], 1) - 1),
+                            (term->dec_om ? 2 : 0));
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'J':       /* erase screen or parts of it */
                        {
-                           unsigned int i = def(esc_args[0], 0) + 1;
+                           unsigned int i = def(term->esc_args[0], 0) + 1;
                            if (i > 3)
                                i = 0;
-                           erase_lots(FALSE, !!(i & 2), !!(i & 1));
+                           erase_lots(term, FALSE, !!(i & 2), !!(i & 1));
                        }
-                       disptop = 0;
-                       seen_disp_event = TRUE;
+                       term->disptop = 0;
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'K':       /* erase line or parts of it */
                        {
-                           unsigned int i = def(esc_args[0], 0) + 1;
+                           unsigned int i = def(term->esc_args[0], 0) + 1;
                            if (i > 3)
                                i = 0;
-                           erase_lots(TRUE, !!(i & 2), !!(i & 1));
+                           erase_lots(term, TRUE, !!(i & 2), !!(i & 1));
                        }
-                       seen_disp_event = TRUE;
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'L':       /* insert lines */
                        compatibility(VT102);
-                       if (curs.y <= marg_b)
-                           scroll(curs.y, marg_b, -def(esc_args[0], 1),
-                                  FALSE);
+                       if (term->curs.y <= term->marg_b)
+                           scroll(term, term->curs.y, term->marg_b,
+                                  -def(term->esc_args[0], 1), FALSE);
                        fix_cpos;
-                       seen_disp_event = TRUE;
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'M':       /* delete lines */
                        compatibility(VT102);
-                       if (curs.y <= marg_b)
-                           scroll(curs.y, marg_b, def(esc_args[0], 1),
+                       if (term->curs.y <= term->marg_b)
+                           scroll(term, term->curs.y, term->marg_b,
+                                  def(term->esc_args[0], 1),
                                   TRUE);
                        fix_cpos;
-                       seen_disp_event = TRUE;
+                       term->seen_disp_event = TRUE;
                        break;
                      case '@':       /* insert chars */
                        /* XXX VTTEST says this is vt220, vt510 manual says vt102 */
                        compatibility(VT102);
-                       insch(def(esc_args[0], 1));
-                       seen_disp_event = TRUE;
+                       insch(term, def(term->esc_args[0], 1));
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'P':       /* delete chars */
                        compatibility(VT102);
-                       insch(-def(esc_args[0], 1));
-                       seen_disp_event = TRUE;
+                       insch(term, -def(term->esc_args[0], 1));
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'c':       /* terminal type query */
                        compatibility(VT100);
                        /* This is the response for a VT102 */
-                       ldisc_send(id_string, strlen(id_string));
+                       if (term->ldisc)
+                           ldisc_send(term->ldisc, term->id_string,
+                                      strlen(term->id_string), 0);
                        break;
                      case 'n':       /* cursor position query */
-                       if (esc_args[0] == 6) {
-                           char buf[32];
-                           sprintf(buf, "\033[%d;%dR", curs.y + 1,
-                                   curs.x + 1);
-                           ldisc_send(buf, strlen(buf));
-                       } else if (esc_args[0] == 5) {
-                           ldisc_send("\033[0n", 4);
+                       if (term->ldisc) {
+                           if (term->esc_args[0] == 6) {
+                               char buf[32];
+                               sprintf(buf, "\033[%d;%dR", term->curs.y + 1,
+                                       term->curs.x + 1);
+                               ldisc_send(term->ldisc, buf, strlen(buf), 0);
+                           } else if (term->esc_args[0] == 5) {
+                               ldisc_send(term->ldisc, "\033[0n", 4, 0);
+                           }
                        }
                        break;
                      case 'h':       /* toggle modes to high */
@@ -1690,132 +2110,163 @@ void term_out(void)
                        compatibility(VT100);
                        {
                            int i;
-                           for (i = 0; i < esc_nargs; i++)
-                               toggle_mode(esc_args[i], esc_query, TRUE);
+                           for (i = 0; i < term->esc_nargs; i++)
+                               toggle_mode(term, term->esc_args[i],
+                                           term->esc_query, TRUE);
                        }
                        break;
+                     case 'i':
+                     case ANSI_QUE('i'):
+                       compatibility(VT100);
+                       {
+                           if (term->esc_nargs != 1) break;
+                           if (term->esc_args[0] == 5 && *term->cfg.printer) {
+                               term->printing = TRUE;
+                               term->only_printing = !term->esc_query;
+                               term->print_state = 0;
+                               term_print_setup(term);
+                           } else if (term->esc_args[0] == 4 &&
+                                      term->printing) {
+                               term_print_finish(term);
+                           }
+                       }
+                       break;                  
                      case 'l':       /* toggle modes to low */
                      case ANSI_QUE('l'):
                        compatibility(VT100);
                        {
                            int i;
-                           for (i = 0; i < esc_nargs; i++)
-                               toggle_mode(esc_args[i], esc_query, FALSE);
+                           for (i = 0; i < term->esc_nargs; i++)
+                               toggle_mode(term, term->esc_args[i],
+                                           term->esc_query, FALSE);
                        }
                        break;
                      case 'g':       /* clear tabs */
                        compatibility(VT100);
-                       if (esc_nargs == 1) {
-                           if (esc_args[0] == 0) {
-                               tabs[curs.x] = FALSE;
-                           } else if (esc_args[0] == 3) {
+                       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 < cols; i++)
-                                   tabs[i] = FALSE;
+                               for (i = 0; i < term->cols; i++)
+                                   term->tabs[i] = FALSE;
                            }
                        }
                        break;
                      case 'r':       /* set scroll margins */
                        compatibility(VT100);
-                       if (esc_nargs <= 2) {
+                       if (term->esc_nargs <= 2) {
                            int top, bot;
-                           top = def(esc_args[0], 1) - 1;
-                           bot = (esc_nargs <= 1
-                                  || esc_args[1] ==
-                                  0 ? rows : def(esc_args[1], rows)) - 1;
-                           if (bot >= rows)
-                               bot = rows - 1;
+                           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) {
-                               marg_t = top;
-                               marg_b = bot;
-                               curs.x = 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
+                                * Well actually it should for
+                                * Origin mode - RDB
                                 */
-                               curs.y = (dec_om ? marg_t : 0);
+                               term->curs.y = (term->dec_om ?
+                                               term->marg_t : 0);
                                fix_cpos;
-                               seen_disp_event = TRUE;
+                               term->seen_disp_event = TRUE;
                            }
                        }
                        break;
                      case 'm':       /* set graphics rendition */
                        {
                            /* 
-                            * A VT100 without the AVO only had one attribute, either
-                            * underline or reverse video depending on the cursor type,
-                            * this was selected by CSI 7m.
+                            * 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
+                            *  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 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.
+                            * The 39 and 49 attributes are likely
+                            * to be unimplemented.
                             */
                            int i;
-                           for (i = 0; i < esc_nargs; i++) {
-                               switch (def(esc_args[i], 0)) {
+                           for (i = 0; i < term->esc_nargs; i++) {
+                               switch (def(term->esc_args[i], 0)) {
                                  case 0:       /* restore defaults */
-                                   curr_attr = ATTR_DEFAULT;
+                                   term->curr_attr = ATTR_DEFAULT;
                                    break;
                                  case 1:       /* enable bold */
                                    compatibility(VT100AVO);
-                                   curr_attr |= ATTR_BOLD;
+                                   term->curr_attr |= ATTR_BOLD;
                                    break;
                                  case 21:      /* (enable double underline) */
                                    compatibility(OTHER);
                                  case 4:       /* enable underline */
                                    compatibility(VT100AVO);
-                                   curr_attr |= ATTR_UNDER;
+                                   term->curr_attr |= ATTR_UNDER;
                                    break;
                                  case 5:       /* enable blink */
                                    compatibility(VT100AVO);
-                                   curr_attr |= ATTR_BLINK;
+                                   term->curr_attr |= ATTR_BLINK;
                                    break;
                                  case 7:       /* enable reverse video */
-                                   curr_attr |= ATTR_REVERSE;
+                                   term->curr_attr |= ATTR_REVERSE;
                                    break;
                                  case 10:      /* SCO acs off */
                                    compatibility(SCOANSI);
-                                   sco_acs = 0; break;
+                                   if (term->cfg.no_remote_charset) break;
+                                   term->sco_acs = 0; break;
                                  case 11:      /* SCO acs on */
                                    compatibility(SCOANSI);
-                                   sco_acs = 1; break;
-                                 case 12:      /* SCO acs on flipped */
+                                   if (term->cfg.no_remote_charset) break;
+                                   term->sco_acs = 1; break;
+                                 case 12:      /* SCO acs on, |0x80 */
                                    compatibility(SCOANSI);
-                                   sco_acs = 2; break;
+                                   if (term->cfg.no_remote_charset) break;
+                                   term->sco_acs = 2; break;
                                  case 22:      /* disable bold */
                                    compatibility2(OTHER, VT220);
-                                   curr_attr &= ~ATTR_BOLD;
+                                   term->curr_attr &= ~ATTR_BOLD;
                                    break;
                                  case 24:      /* disable underline */
                                    compatibility2(OTHER, VT220);
-                                   curr_attr &= ~ATTR_UNDER;
+                                   term->curr_attr &= ~ATTR_UNDER;
                                    break;
                                  case 25:      /* disable blink */
                                    compatibility2(OTHER, VT220);
-                                   curr_attr &= ~ATTR_BLINK;
+                                   term->curr_attr &= ~ATTR_BLINK;
                                    break;
                                  case 27:      /* disable reverse video */
                                    compatibility2(OTHER, VT220);
-                                   curr_attr &= ~ATTR_REVERSE;
+                                   term->curr_attr &= ~ATTR_REVERSE;
                                    break;
                                  case 30:
                                  case 31:
@@ -1826,13 +2277,13 @@ void term_out(void)
                                  case 36:
                                  case 37:
                                    /* foreground */
-                                   curr_attr &= ~ATTR_FGMASK;
-                                   curr_attr |=
-                                       (esc_args[i] - 30) << ATTR_FGSHIFT;
+                                   term->curr_attr &= ~ATTR_FGMASK;
+                                   term->curr_attr |=
+                                       (term->esc_args[i] - 30)<<ATTR_FGSHIFT;
                                    break;
                                  case 39:      /* default-foreground */
-                                   curr_attr &= ~ATTR_FGMASK;
-                                   curr_attr |= ATTR_DEFFG;
+                                   term->curr_attr &= ~ATTR_FGMASK;
+                                   term->curr_attr |= ATTR_DEFFG;
                                    break;
                                  case 40:
                                  case 41:
@@ -1843,28 +2294,29 @@ void term_out(void)
                                  case 46:
                                  case 47:
                                    /* background */
-                                   curr_attr &= ~ATTR_BGMASK;
-                                   curr_attr |=
-                                       (esc_args[i] - 40) << ATTR_BGSHIFT;
+                                   term->curr_attr &= ~ATTR_BGMASK;
+                                   term->curr_attr |=
+                                       (term->esc_args[i] - 40)<<ATTR_BGSHIFT;
                                    break;
                                  case 49:      /* default-background */
-                                   curr_attr &= ~ATTR_BGMASK;
-                                   curr_attr |= ATTR_DEFBG;
+                                   term->curr_attr &= ~ATTR_BGMASK;
+                                   term->curr_attr |= ATTR_DEFBG;
                                    break;
                                }
                            }
-                           if (use_bce)
-                               erase_char = (' ' | ATTR_ASCII |
-                                            (curr_attr & 
-                                             (ATTR_FGMASK | ATTR_BGMASK)));
+                           if (term->use_bce)
+                               term->erase_char = (' ' | ATTR_ASCII |
+                                                   (term->curr_attr & 
+                                                    (ATTR_FGMASK |
+                                                     ATTR_BGMASK)));
                        }
                        break;
                      case 's':       /* save cursor */
-                       save_cursor(TRUE);
+                       save_cursor(term, TRUE);
                        break;
                      case 'u':       /* restore cursor */
-                       save_cursor(FALSE);
-                       seen_disp_event = TRUE;
+                       save_cursor(term, FALSE);
+                       term->seen_disp_event = TRUE;
                        break;
                      case 't':       /* set page size - ie window height */
                        /*
@@ -1873,26 +2325,147 @@ void term_out(void)
                         * illegal values (eg first arg 1..9) for window changing 
                         * and reports.
                         */
-                       compatibility(VT340TEXT);
-                       if (esc_nargs <= 1
-                           && (esc_args[0] < 1 || esc_args[0] >= 24)) {
-                           request_resize(cols, def(esc_args[0], 24), 0);
-                           deselect();
+                       if (term->esc_nargs <= 1
+                           && (term->esc_args[0] < 1 ||
+                               term->esc_args[0] >= 24)) {
+                           compatibility(VT340TEXT);
+                           if (!term->cfg.no_remote_resize)
+                               request_resize(term->frontend, term->cols,
+                                              def(term->esc_args[0], 24));
+                           deselect(term);
+                       } else if (term->esc_nargs >= 1 &&
+                                  term->esc_args[0] >= 1 &&
+                                  term->esc_args[0] < 24) {
+                           compatibility(OTHER);
+
+                           switch (term->esc_args[0]) {
+                               int x, y, len;
+                               char buf[80], *p;
+                             case 1:
+                               set_iconic(term->frontend, FALSE);
+                               break;
+                             case 2:
+                               set_iconic(term->frontend, TRUE);
+                               break;
+                             case 3:
+                               if (term->esc_nargs >= 3) {
+                                   if (!term->cfg.no_remote_resize)
+                                       move_window(term->frontend,
+                                                   def(term->esc_args[1], 0),
+                                                   def(term->esc_args[2], 0));
+                               }
+                               break;
+                             case 4:
+                               /* We should resize the window to a given
+                                * size in pixels here, but currently our
+                                * resizing code isn't healthy enough to
+                                * manage it. */
+                               break;
+                             case 5:
+                               /* move to top */
+                               set_zorder(term->frontend, TRUE);
+                               break;
+                             case 6:
+                               /* move to bottom */
+                               set_zorder(term->frontend, FALSE);
+                               break;
+                             case 7:
+                               refresh_window(term->frontend);
+                               break;
+                             case 8:
+                               if (term->esc_nargs >= 3) {
+                                   if (!term->cfg.no_remote_resize)
+                                       request_resize(term->frontend,
+                                                      def(term->esc_args[2], term->cfg.width),
+                                                      def(term->esc_args[1], term->cfg.height));
+                               }
+                               break;
+                             case 9:
+                               if (term->esc_nargs >= 2)
+                                   set_zoomed(term->frontend,
+                                              term->esc_args[1] ?
+                                              TRUE : FALSE);
+                               break;
+                             case 11:
+                               if (term->ldisc)
+                                   ldisc_send(term->ldisc,
+                                              is_iconic(term->frontend) ?
+                                              "\033[1t" : "\033[2t", 4, 0);
+                               break;
+                             case 13:
+                               if (term->ldisc) {
+                                   get_window_pos(term->frontend, &x, &y);
+                                   len = sprintf(buf, "\033[3;%d;%dt", x, y);
+                                   ldisc_send(term->ldisc, buf, len, 0);
+                               }
+                               break;
+                             case 14:
+                               if (term->ldisc) {
+                                   get_window_pixels(term->frontend, &x, &y);
+                                   len = sprintf(buf, "\033[4;%d;%dt", x, y);
+                                   ldisc_send(term->ldisc, buf, len, 0);
+                               }
+                               break;
+                             case 18:
+                               if (term->ldisc) {
+                                   len = sprintf(buf, "\033[8;%d;%dt",
+                                                 term->rows, term->cols);
+                                   ldisc_send(term->ldisc, buf, len, 0);
+                               }
+                               break;
+                             case 19:
+                               /*
+                                * Hmmm. Strictly speaking we
+                                * should return `the size of the
+                                * screen in characters', but
+                                * that's not easy: (a) window
+                                * furniture being what it is it's
+                                * hard to compute, and (b) in
+                                * resize-font mode maximising the
+                                * window wouldn't change the
+                                * number of characters. *shrug*. I
+                                * think we'll ignore it for the
+                                * moment and see if anyone
+                                * complains, and then ask them
+                                * what they would like it to do.
+                                */
+                               break;
+                             case 20:
+                               if (term->ldisc) {
+                                   p = get_window_title(term->frontend, TRUE);
+                                   len = strlen(p);
+                                   ldisc_send(term->ldisc, "\033]L", 3, 0);
+                                   ldisc_send(term->ldisc, p, len, 0);
+                                   ldisc_send(term->ldisc, "\033\\", 2, 0);
+                               }
+                               break;
+                             case 21:
+                               if (term->ldisc) {
+                                   p = get_window_title(term->frontend,FALSE);
+                                   len = strlen(p);
+                                   ldisc_send(term->ldisc, "\033]l", 3, 0);
+                                   ldisc_send(term->ldisc, p, len, 0);
+                                   ldisc_send(term->ldisc, "\033\\", 2, 0);
+                               }
+                               break;
+                           }
                        }
                        break;
                      case 'S':
                        compatibility(SCOANSI);
-                       scroll(marg_t, marg_b, def(esc_args[0], 1), TRUE);
+                       scroll(term, term->marg_t, term->marg_b,
+                              def(term->esc_args[0], 1), TRUE);
                        fix_cpos;
-                       wrapnext = FALSE;
-                       seen_disp_event = TRUE;
+                       term->wrapnext = FALSE;
+                       term->seen_disp_event = TRUE;
                        break;
                      case 'T':
                        compatibility(SCOANSI);
-                       scroll(marg_t, marg_b, -def(esc_args[0], 1), TRUE);
+                       scroll(term, term->marg_t, term->marg_b,
+                              -def(term->esc_args[0], 1), TRUE);
                        fix_cpos;
-                       wrapnext = FALSE;
-                       seen_disp_event = TRUE;
+                       term->wrapnext = FALSE;
+                       term->seen_disp_event = TRUE;
                        break;
                      case ANSI('|', '*'):
                        /* VT420 sequence DECSNLS
@@ -1901,11 +2474,12 @@ void term_out(void)
                         * reasonable range (24..49 AIUI) with no default specified.
                         */
                        compatibility(VT420);
-                       if (esc_nargs == 1 && esc_args[0] > 0) {
-                           request_resize(cols,
-                                          def(esc_args[0], cfg.height),
-                                          0);
-                           deselect();
+                       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('|', '$'):
@@ -1914,159 +2488,170 @@ void term_out(void)
                         * Docs imply range is only 80 or 132, but I'll allow any.
                         */
                        compatibility(VT340TEXT);
-                       if (esc_nargs <= 1) {
-                           request_resize(def(esc_args[0], cfg.width),
-                                          rows, 0);
-                           deselect();
+                       if (term->esc_nargs <= 1) {
+                           if (!term->cfg.no_remote_resize)
+                               request_resize(term->frontend,
+                                              def(term->esc_args[0],
+                                                  term->cfg.width), term->rows);
+                           deselect(term);
                        }
                        break;
                      case 'X':       /* write N spaces w/o moving cursor */
                        /* XXX VTTEST says this is vt220, vt510 manual says vt100 */
                        compatibility(ANSIMIN);
                        {
-                           int n = def(esc_args[0], 1);
+                           int n = def(term->esc_args[0], 1);
                            pos cursplus;
-                           unsigned long *p = cpos;
-                           if (n > cols - curs.x)
-                               n = cols - curs.x;
-                           cursplus = curs;
+                           unsigned long *p = term->cpos;
+                           if (n > term->cols - term->curs.x)
+                               n = term->cols - term->curs.x;
+                           cursplus = term->curs;
                            cursplus.x += n;
-                           check_selection(curs, cursplus);
+                           check_boundary(term, term->curs.x, term->curs.y);
+                           check_boundary(term, term->curs.x+n, term->curs.y);
+                           check_selection(term, term->curs, cursplus);
                            while (n--)
-                               *p++ = erase_char;
-                           seen_disp_event = TRUE;
+                               *p++ = term->erase_char;
+                           term->seen_disp_event = TRUE;
                        }
                        break;
                      case 'x':       /* report terminal characteristics */
                        compatibility(VT100);
-                       {
+                       if (term->ldisc) {
                            char buf[32];
-                           int i = def(esc_args[0], 0);
+                           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(buf, 20);
+                               ldisc_send(term->ldisc, buf, 20, 0);
                            }
                        }
                        break;
                      case 'Z':         /* BackTab for xterm */
                        compatibility(OTHER);
                        {
-                           int i = def(esc_args[0], 1);
-                           pos old_curs = curs;
+                           int i = def(term->esc_args[0], 1);
+                           pos old_curs = term->curs;
 
-                           for(;i>0 && curs.x>0; i--) {
+                           for(;i>0 && term->curs.x>0; i--) {
                                do {
-                                   curs.x--;
-                               } while (curs.x >0 && !tabs[curs.x]);
+                                   term->curs.x--;
+                               } while (term->curs.x >0 &&
+                                        !term->tabs[term->curs.x]);
                            }
                            fix_cpos;
-                           check_selection(old_curs, curs);
+                           check_selection(term, old_curs, term->curs);
                        }
                        break;
                      case ANSI('L', '='):
                        compatibility(OTHER);
-                       use_bce = (esc_args[0] <= 0);
-                       erase_char = ERASE_CHAR;
-                       if (use_bce)
-                           erase_char = (' ' | ATTR_ASCII |
-                                        (curr_attr & 
-                                         (ATTR_FGMASK | ATTR_BGMASK)));
+                       term->use_bce = (term->esc_args[0] <= 0);
+                       term->erase_char = ERASE_CHAR;
+                       if (term->use_bce)
+                           term->erase_char = (' ' | ATTR_ASCII |
+                                               (term->curr_attr & 
+                                                (ATTR_FGMASK | ATTR_BGMASK)));
                        break;
                      case ANSI('E', '='):
                        compatibility(OTHER);
-                       blink_is_real = (esc_args[0] >= 1);
+                       term->blink_is_real = (term->esc_args[0] >= 1);
                        break;
                      case ANSI('p', '"'):
-                       /* Allow the host to make this emulator a 'perfect' VT102.
-                        * This first appeared in the VT220, but we do need to get 
-                        * back to PuTTY mode so I won't check it.
+                       /*
+                        * 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.
+                        * 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 (esc_args[0]) {
+                       switch (term->esc_args[0]) {
                          case 61:
-                           compatibility_level &= ~TM_VTXXX;
-                           compatibility_level |= TM_VT102;
+                           term->compatibility_level &= ~TM_VTXXX;
+                           term->compatibility_level |= TM_VT102;
                            break;
                          case 62:
-                           compatibility_level &= ~TM_VTXXX;
-                           compatibility_level |= TM_VT220;
+                           term->compatibility_level &= ~TM_VTXXX;
+                           term->compatibility_level |= TM_VT220;
                            break;
 
                          default:
-                           if (esc_args[0] > 60 && esc_args[0] < 70)
-                               compatibility_level |= TM_VTXXX;
+                           if (term->esc_args[0] > 60 &&
+                               term->esc_args[0] < 70)
+                               term->compatibility_level |= TM_VTXXX;
                            break;
 
                          case 40:
-                           compatibility_level &= TM_VTXXX;
+                           term->compatibility_level &= TM_VTXXX;
                            break;
                          case 41:
-                           compatibility_level = TM_PUTTY;
+                           term->compatibility_level = TM_PUTTY;
                            break;
                          case 42:
-                           compatibility_level = TM_SCOANSI;
+                           term->compatibility_level = TM_SCOANSI;
                            break;
 
                          case ARG_DEFAULT:
-                           compatibility_level = TM_PUTTY;
+                           term->compatibility_level = TM_PUTTY;
                            break;
                          case 50:
                            break;
                        }
 
                        /* Change the response to CSI c */
-                       if (esc_args[0] == 50) {
+                       if (term->esc_args[0] == 50) {
                            int i;
                            char lbuf[64];
-                           strcpy(id_string, "\033[?");
-                           for (i = 1; i < esc_nargs; i++) {
+                           strcpy(term->id_string, "\033[?");
+                           for (i = 1; i < term->esc_nargs; i++) {
                                if (i != 1)
-                                   strcat(id_string, ";");
-                               sprintf(lbuf, "%d", esc_args[i]);
-                               strcat(id_string, lbuf);
+                                   strcat(term->id_string, ";");
+                               sprintf(lbuf, "%d", term->esc_args[i]);
+                               strcat(term->id_string, lbuf);
                            }
-                           strcat(id_string, "c");
+                           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 (reset_132)
-                               request_resize(132, 24, 1);
-                           else
-                               request_resize(80, 24, 1);
+                           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:
-               osc_w = FALSE;
+               term->osc_w = FALSE;
                switch (c) {
                  case 'P':            /* Linux palette sequence */
-                   termstate = SEEN_OSC_P;
-                   osc_strlen = 0;
+                   term->termstate = SEEN_OSC_P;
+                   term->osc_strlen = 0;
                    break;
                  case 'R':            /* Linux palette reset */
-                   palette_reset();
-                   term_invalidate();
-                   termstate = TOPLEVEL;
+                   palette_reset(term->frontend);
+                   term_invalidate(term);
+                   term->termstate = TOPLEVEL;
                    break;
                  case 'W':            /* word-set */
-                   termstate = SEEN_OSC_W;
-                   osc_w = TRUE;
+                   term->termstate = SEEN_OSC_W;
+                   term->osc_w = TRUE;
                    break;
                  case '0':
                  case '1':
@@ -2078,21 +2663,21 @@ void term_out(void)
                  case '7':
                  case '8':
                  case '9':
-                   esc_args[0] = 10 * esc_args[0] + c - '0';
+                   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 (esc_args[0] == 2) {
-                       esc_args[0] = 1;
+                   if (term->esc_args[0] == 2) {
+                       term->esc_args[0] = 1;
                        break;
                    }
                    /* else fall through */
                  default:
-                   termstate = OSC_STRING;
-                   osc_strlen = 0;
+                   term->termstate = OSC_STRING;
+                   term->osc_strlen = 0;
                }
                break;
              case OSC_STRING:
@@ -2106,8 +2691,8 @@ void term_out(void)
                 *
                 * -- RDB
                 */
-               if (c == '\n' || c == '\r') {
-                   termstate = TOPLEVEL;
+               if (c == '\012' || c == '\015') {
+                   term->termstate = TOPLEVEL;
                } else if (c == 0234 || c == '\007') {
                    /*
                     * These characters terminate the string; ST and BEL
@@ -2116,16 +2701,16 @@ void term_out(void)
                     * mode unless it is followed by \, in which case it is
                     * synonymous with ST in the first place.
                     */
-                   do_osc();
-                   termstate = TOPLEVEL;
+                   do_osc(term);
+                   term->termstate = TOPLEVEL;
                } else if (c == '\033')
-                   termstate = OSC_MAYBE_ST;
-               else if (osc_strlen < OSC_STR_MAX)
-                   osc_string[osc_strlen++] = c;
+                   term->termstate = OSC_MAYBE_ST;
+               else if (term->osc_strlen < OSC_STR_MAX)
+                   term->osc_string[term->osc_strlen++] = c;
                break;
              case SEEN_OSC_P:
                {
-                   int max = (osc_strlen == 0 ? 21 : 16);
+                   int max = (term->osc_strlen == 0 ? 21 : 16);
                    int val;
                    if (c >= '0' && c <= '9')
                        val = c - '0';
@@ -2134,17 +2719,17 @@ void term_out(void)
                    else if (c >= 'a' && c <= 'a' + max - 10)
                        val = c - 'a' + 10;
                    else {
-                       termstate = TOPLEVEL;
+                       term->termstate = TOPLEVEL;
                        break;
                    }
-                   osc_string[osc_strlen++] = val;
-                   if (osc_strlen >= 7) {
-                       palette_set(osc_string[0],
-                                   osc_string[1] * 16 + osc_string[2],
-                                   osc_string[3] * 16 + osc_string[4],
-                                   osc_string[5] * 16 + osc_string[6]);
-                       term_invalidate();
-                       termstate = TOPLEVEL;
+                   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;
@@ -2160,28 +2745,28 @@ void term_out(void)
                  case '7':
                  case '8':
                  case '9':
-                   esc_args[0] = 10 * esc_args[0] + c - '0';
+                   term->esc_args[0] = 10 * term->esc_args[0] + c - '0';
                    break;
                  default:
-                   termstate = OSC_STRING;
-                   osc_strlen = 0;
+                   term->termstate = OSC_STRING;
+                   term->osc_strlen = 0;
                }
                break;
              case VT52_ESC:
-               termstate = TOPLEVEL;
-               seen_disp_event = TRUE;
+               term->termstate = TOPLEVEL;
+               term->seen_disp_event = TRUE;
                switch (c) {
                  case 'A':
-                   move(curs.x, curs.y - 1, 1);
+                   move(term, term->curs.x, term->curs.y - 1, 1);
                    break;
                  case 'B':
-                   move(curs.x, curs.y + 1, 1);
+                   move(term, term->curs.x, term->curs.y + 1, 1);
                    break;
                  case 'C':
-                   move(curs.x + 1, curs.y, 1);
+                   move(term, term->curs.x + 1, term->curs.y, 1);
                    break;
                  case 'D':
-                   move(curs.x - 1, curs.y, 1);
+                   move(term, term->curs.x - 1, term->curs.y, 1);
                    break;
                    /*
                     * From the VT100 Manual
@@ -2224,28 +2809,28 @@ void term_out(void)
                     *
                     */
                  case 'F':
-                   cset_attr[cset = 0] = ATTR_LINEDRW;
+                   term->cset_attr[term->cset = 0] = ATTR_LINEDRW;
                    break;
                  case 'G':
-                   cset_attr[cset = 0] = ATTR_ASCII;
+                   term->cset_attr[term->cset = 0] = ATTR_ASCII;
                    break;
                  case 'H':
-                   move(0, 0, 0);
+                   move(term, 0, 0, 0);
                    break;
                  case 'I':
-                   if (curs.y == 0)
-                       scroll(0, rows - 1, -1, TRUE);
-                   else if (curs.y > 0)
-                       curs.y--;
+                   if (term->curs.y == 0)
+                       scroll(term, 0, term->rows - 1, -1, TRUE);
+                   else if (term->curs.y > 0)
+                       term->curs.y--;
                    fix_cpos;
-                   wrapnext = FALSE;
+                   term->wrapnext = FALSE;
                    break;
                  case 'J':
-                   erase_lots(FALSE, FALSE, TRUE);
-                   disptop = 0;
+                   erase_lots(term, FALSE, FALSE, TRUE);
+                   term->disptop = 0;
                    break;
                  case 'K':
-                   erase_lots(TRUE, FALSE, TRUE);
+                   erase_lots(term, TRUE, FALSE, TRUE);
                    break;
 #if 0
                  case 'V':
@@ -2259,24 +2844,25 @@ void term_out(void)
                    break;
 #endif
                  case 'Y':
-                   termstate = VT52_Y1;
+                   term->termstate = VT52_Y1;
                    break;
                  case 'Z':
-                   ldisc_send("\033/Z", 3);
+                   if (term->ldisc)
+                       ldisc_send(term->ldisc, "\033/Z", 3, 0);
                    break;
                  case '=':
-                   app_keypad_keys = TRUE;
+                   term->app_keypad_keys = TRUE;
                    break;
                  case '>':
-                   app_keypad_keys = FALSE;
+                   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.
                     */
-                   vt52_mode = FALSE;
-                   blink_is_real = cfg.blinktext;
+                   term->vt52_mode = FALSE;
+                   term->blink_is_real = term->cfg.blinktext;
                    break;
 #if 0
                  case '^':
@@ -2293,147 +2879,150 @@ void term_out(void)
 #ifdef VT52_PLUS
                  case 'E':
                    /* compatibility(ATARI) */
-                   move(0, 0, 0);
-                   erase_lots(FALSE, FALSE, TRUE);
-                   disptop = 0;
+                   move(term, 0, 0, 0);
+                   erase_lots(term, FALSE, FALSE, TRUE);
+                   term->disptop = 0;
                    break;
                  case 'L':
                    /* compatibility(ATARI) */
-                   if (curs.y <= marg_b)
-                       scroll(curs.y, marg_b, -1, FALSE);
+                   if (term->curs.y <= term->marg_b)
+                       scroll(term, term->curs.y, term->marg_b, -1, FALSE);
                    break;
                  case 'M':
                    /* compatibility(ATARI) */
-                   if (curs.y <= marg_b)
-                       scroll(curs.y, marg_b, 1, TRUE);
+                   if (term->curs.y <= term->marg_b)
+                       scroll(term, term->curs.y, term->marg_b, 1, TRUE);
                    break;
                  case 'b':
                    /* compatibility(ATARI) */
-                   termstate = VT52_FG;
+                   term->termstate = VT52_FG;
                    break;
                  case 'c':
                    /* compatibility(ATARI) */
-                   termstate = VT52_BG;
+                   term->termstate = VT52_BG;
                    break;
                  case 'd':
                    /* compatibility(ATARI) */
-                   erase_lots(FALSE, TRUE, FALSE);
-                   disptop = 0;
+                   erase_lots(term, FALSE, TRUE, FALSE);
+                   term->disptop = 0;
                    break;
                  case 'e':
                    /* compatibility(ATARI) */
-                   cursor_on = TRUE;
+                   term->cursor_on = TRUE;
                    break;
                  case 'f':
                    /* compatibility(ATARI) */
-                   cursor_on = FALSE;
+                   term->cursor_on = FALSE;
                    break;
                    /* case 'j': Save cursor position - broken on ST */
                    /* case 'k': Restore cursor position */
                  case 'l':
                    /* compatibility(ATARI) */
-                   erase_lots(TRUE, TRUE, TRUE);
-                   curs.x = 0;
-                   wrapnext = FALSE;
+                   erase_lots(term, TRUE, TRUE, TRUE);
+                   term->curs.x = 0;
+                   term->wrapnext = FALSE;
                    fix_cpos;
                    break;
                  case 'o':
                    /* compatibility(ATARI) */
-                   erase_lots(TRUE, TRUE, FALSE);
+                   erase_lots(term, TRUE, TRUE, FALSE);
                    break;
                  case 'p':
                    /* compatibility(ATARI) */
-                   curr_attr |= ATTR_REVERSE;
+                   term->curr_attr |= ATTR_REVERSE;
                    break;
                  case 'q':
                    /* compatibility(ATARI) */
-                   curr_attr &= ~ATTR_REVERSE;
+                   term->curr_attr &= ~ATTR_REVERSE;
                    break;
                  case 'v':            /* wrap Autowrap on - Wyse style */
                    /* compatibility(ATARI) */
-                   wrap = 1;
+                   term->wrap = 1;
                    break;
                  case 'w':            /* Autowrap off */
                    /* compatibility(ATARI) */
-                   wrap = 0;
+                   term->wrap = 0;
                    break;
 
                  case 'R':
                    /* compatibility(OTHER) */
-                   vt52_bold = FALSE;
-                   curr_attr = ATTR_DEFAULT;
-                   if (use_bce)
-                       erase_char = (' ' | ATTR_ASCII |
-                                    (curr_attr & 
-                                     (ATTR_FGMASK | ATTR_BGMASK)));
+                   term->vt52_bold = FALSE;
+                   term->curr_attr = ATTR_DEFAULT;
+                   if (term->use_bce)
+                       term->erase_char = (' ' | ATTR_ASCII |
+                                           (term->curr_attr & 
+                                            (ATTR_FGMASK | ATTR_BGMASK)));
                    break;
                  case 'S':
                    /* compatibility(VI50) */
-                   curr_attr |= ATTR_UNDER;
+                   term->curr_attr |= ATTR_UNDER;
                    break;
                  case 'W':
                    /* compatibility(VI50) */
-                   curr_attr &= ~ATTR_UNDER;
+                   term->curr_attr &= ~ATTR_UNDER;
                    break;
                  case 'U':
                    /* compatibility(VI50) */
-                   vt52_bold = TRUE;
-                   curr_attr |= ATTR_BOLD;
+                   term->vt52_bold = TRUE;
+                   term->curr_attr |= ATTR_BOLD;
                    break;
                  case 'T':
                    /* compatibility(VI50) */
-                   vt52_bold = FALSE;
-                   curr_attr &= ~ATTR_BOLD;
+                   term->vt52_bold = FALSE;
+                   term->curr_attr &= ~ATTR_BOLD;
                    break;
 #endif
                }
                break;
              case VT52_Y1:
-               termstate = VT52_Y2;
-               move(curs.x, c - ' ', 0);
+               term->termstate = VT52_Y2;
+               move(term, term->curs.x, c - ' ', 0);
                break;
              case VT52_Y2:
-               termstate = TOPLEVEL;
-               move(c - ' ', curs.y, 0);
+               term->termstate = TOPLEVEL;
+               move(term, c - ' ', term->curs.y, 0);
                break;
 
 #ifdef VT52_PLUS
              case VT52_FG:
-               termstate = TOPLEVEL;
-               curr_attr &= ~ATTR_FGMASK;
-               curr_attr &= ~ATTR_BOLD;
-               curr_attr |= (c & 0x7) << ATTR_FGSHIFT;
-               if ((c & 0x8) || vt52_bold)
-                   curr_attr |= ATTR_BOLD;
-
-               if (use_bce)
-                   erase_char = (' ' | ATTR_ASCII |
-                                (curr_attr & (ATTR_FGMASK | ATTR_BGMASK)));
+               term->termstate = TOPLEVEL;
+               term->curr_attr &= ~ATTR_FGMASK;
+               term->curr_attr &= ~ATTR_BOLD;
+               term->curr_attr |= (c & 0x7) << ATTR_FGSHIFT;
+               if ((c & 0x8) || term->vt52_bold)
+                   term->curr_attr |= ATTR_BOLD;
+
+               if (term->use_bce)
+                   term->erase_char = (' ' | ATTR_ASCII |
+                                       (term->curr_attr &
+                                        (ATTR_FGMASK | ATTR_BGMASK)));
                break;
              case VT52_BG:
-               termstate = TOPLEVEL;
-               curr_attr &= ~ATTR_BGMASK;
-               curr_attr &= ~ATTR_BLINK;
-               curr_attr |= (c & 0x7) << ATTR_BGSHIFT;
+               term->termstate = TOPLEVEL;
+               term->curr_attr &= ~ATTR_BGMASK;
+               term->curr_attr &= ~ATTR_BLINK;
+               term->curr_attr |= (c & 0x7) << ATTR_BGSHIFT;
 
                /* Note: bold background */
                if (c & 0x8)
-                   curr_attr |= ATTR_BLINK;
+                   term->curr_attr |= ATTR_BLINK;
 
-               if (use_bce)
-                   erase_char = (' ' | ATTR_ASCII |
-                                (curr_attr & (ATTR_FGMASK | ATTR_BGMASK)));
+               if (term->use_bce)
+                   term->erase_char = (' ' | ATTR_ASCII |
+                                       (term->curr_attr &
+                                        (ATTR_FGMASK | ATTR_BGMASK)));
                break;
 #endif
              default: break;          /* placate gcc warning about enum use */
            }
-       if (selstate != NO_SELECTION) {
-           pos cursplus = curs;
+       if (term->selstate != NO_SELECTION) {
+           pos cursplus = term->curs;
            incpos(cursplus);
-           check_selection(curs, cursplus);
+           check_selection(term, term->curs, cursplus);
        }
     }
-    inbuf_head = 0;
+
+    term_print_flush(term);
 }
 
 #if 0
@@ -2442,11 +3031,11 @@ void term_out(void)
  * alike to scroll-optimise one to the other. Return the degree of
  * similarity.
  */
-static int linecmp(unsigned long *a, unsigned long *b)
+static int linecmp(Terminal *term, unsigned long *a, unsigned long *b)
 {
     int i, n;
 
-    for (i = n = 0; i < cols; i++)
+    for (i = n = 0; i < term->cols; i++)
        n += (*a++ == *b++);
     return n;
 }
@@ -2456,25 +3045,25 @@ static int linecmp(unsigned long *a, unsigned long *b)
  * Given a context, update the window. Out of paranoia, we don't
  * allow WM_PAINT responses to do scrolling optimisations.
  */
-static void do_paint(Context ctx, int may_optimise)
+static void do_paint(Terminal *term, Context ctx, int may_optimise)
 {
-    int i, j, our_curs_y;
+    int i, j, our_curs_y, our_curs_x;
     unsigned long rv, cursor;
     pos scrpos;
     char ch[1024];
     long cursor_background = ERASE_CHAR;
-    long ticks;
+    unsigned long ticks;
 
     /*
      * Check the visual bell state.
      */
-    if (in_vbell) {
-       ticks = GetTickCount();
-       if (ticks - vbell_timeout >= 0)
-           in_vbell = FALSE;
-    }
+    if (term->in_vbell) {
+       ticks = GETTICKCOUNT();
+       if (ticks - term->vbell_startpoint >= VBELL_TIMEOUT)
+           term->in_vbell = FALSE; 
+   }
 
-    rv = (!rvideo ^ !in_vbell ? ATTR_REVERSE : 0);
+    rv = (!term->rvideo ^ !term->in_vbell ? ATTR_REVERSE : 0);
 
     /* Depends on:
      * screen array, disptop, scrtop,
@@ -2484,52 +3073,69 @@ static void do_paint(Context ctx, int may_optimise)
      */
 
     /* Has the cursor position or type changed ? */
-    if (cursor_on) {
-       if (has_focus) {
-           if (blinker || !cfg.blink_cur)
+    if (term->cursor_on) {
+       if (term->has_focus) {
+           if (term->blinker || !term->cfg.blink_cur)
                cursor = TATTR_ACTCURS;
            else
                cursor = 0;
        } else
            cursor = TATTR_PASCURS;
-       if (wrapnext)
+       if (term->wrapnext)
            cursor |= TATTR_RIGHTCURS;
     } else
        cursor = 0;
-    our_curs_y = curs.y - disptop;
-
-    if (dispcurs && (curstype != cursor ||
-                    dispcurs !=
-                    disptext + our_curs_y * (cols + 1) + curs.x)) {
-       if (dispcurs > disptext && (dispcurs[-1] & ATTR_WIDE))
-           dispcurs[-1] |= ATTR_INVALID;
-       if ((*dispcurs & ATTR_WIDE))
-           dispcurs[1] |= ATTR_INVALID;
-       *dispcurs |= ATTR_INVALID;
-       curstype = 0;
+    our_curs_y = term->curs.y - term->disptop;
+    {
+       /*
+        * Adjust the cursor position in the case where it's
+        * resting on the right-hand half of a CJK wide character.
+        * xterm's behaviour here, which seems adequate to me, is
+        * to display the cursor covering the _whole_ character,
+        * exactly as if it were one space to the left.
+        */
+       unsigned long *ldata = lineptr(term->curs.y);
+       our_curs_x = term->curs.x;
+       if (our_curs_x > 0 &&
+           (ldata[our_curs_x] & (CHAR_MASK | CSET_MASK)) == UCSWIDE)
+           our_curs_x--;
     }
-    dispcurs = NULL;
+
+    if (term->dispcurs && (term->curstype != cursor ||
+                          term->dispcurs !=
+                          term->disptext + our_curs_y * (term->cols + 1) +
+                          our_curs_x)) {
+       if (term->dispcurs > term->disptext && 
+           (*term->dispcurs & (CHAR_MASK | CSET_MASK)) == UCSWIDE)
+           term->dispcurs[-1] |= ATTR_INVALID;
+       if ( (term->dispcurs[1] & (CHAR_MASK | CSET_MASK)) == UCSWIDE)
+           term->dispcurs[1] |= ATTR_INVALID;
+       *term->dispcurs |= ATTR_INVALID;
+       term->curstype = 0;
+    }
+    term->dispcurs = NULL;
 
     /* The normal screen data */
-    for (i = 0; i < rows; i++) {
+    for (i = 0; i < term->rows; i++) {
        unsigned long *ldata;
        int lattr;
-       int idx, dirty_line, dirty_run;
+       int idx, dirty_line, dirty_run, selected;
        unsigned long attr = 0;
        int updated_line = 0;
        int start = 0;
        int ccount = 0;
        int last_run_dirty = 0;
 
-       scrpos.y = i + disptop;
+       scrpos.y = i + term->disptop;
        ldata = lineptr(scrpos.y);
-       lattr = (ldata[cols] & LATTR_MODE);
+       lattr = (ldata[term->cols] & LATTR_MODE);
 
-       idx = i * (cols + 1);
-       dirty_run = dirty_line = (ldata[cols] != disptext[idx + cols]);
-       disptext[idx + cols] = ldata[cols];
+       idx = i * (term->cols + 1);
+       dirty_run = dirty_line = (ldata[term->cols] !=
+                                 term->disptext[idx + term->cols]);
+       term->disptext[idx + term->cols] = ldata[term->cols];
 
-       for (j = 0; j < cols; j++, idx++) {
+       for (j = 0; j < term->cols; j++, idx++) {
            unsigned long tattr, tchar;
            unsigned long *d = ldata + j;
            int break_run;
@@ -2539,26 +3145,36 @@ static void do_paint(Context ctx, int may_optimise)
            tattr = (*d & (ATTR_MASK ^ CSET_MASK));
            switch (tchar & CSET_MASK) {
              case ATTR_ASCII:
-               tchar = unitab_line[tchar & 0xFF];
+               tchar = term->ucsdata->unitab_line[tchar & 0xFF];
                break;
              case ATTR_LINEDRW:
-               tchar = unitab_xterm[tchar & 0xFF];
+               tchar = term->ucsdata->unitab_xterm[tchar & 0xFF];
                break;
              case ATTR_SCOACS:  
-               tchar = unitab_scoacs[tchar&0xFF]; 
+               tchar = term->ucsdata->unitab_scoacs[tchar&0xFF]; 
                break;
            }
            tattr |= (tchar & CSET_MASK);
            tchar &= CHAR_MASK;
+           if ((d[1] & (CHAR_MASK | CSET_MASK)) == UCSWIDE)
+                   tattr |= ATTR_WIDE;
 
            /* Video reversing things */
+           if (term->selstate == DRAGGING || term->selstate == SELECTED) {
+               if (term->seltype == LEXICOGRAPHIC)
+                   selected = (posle(term->selstart, scrpos) &&
+                               poslt(scrpos, term->selend));
+               else
+                   selected = (posPle(term->selstart, scrpos) &&
+                               posPlt(scrpos, term->selend));
+           } else
+               selected = FALSE;
            tattr = (tattr ^ rv
-                    ^ (posle(selstart, scrpos) &&
-                       poslt(scrpos, selend) ? ATTR_REVERSE : 0));
+                    ^ (selected ? ATTR_REVERSE : 0));
 
            /* 'Real' blinking ? */
-           if (blink_is_real && (tattr & ATTR_BLINK)) {
-               if (has_focus && tblinker) {
+           if (term->blink_is_real && (tattr & ATTR_BLINK)) {
+               if (term->has_focus && term->tblinker) {
                    tchar = ' ';
                    tattr &= ~CSET_MASK;
                    tattr |= ATTR_ACP;
@@ -2566,23 +3182,35 @@ static void do_paint(Context ctx, int may_optimise)
                tattr &= ~ATTR_BLINK;
            }
 
+           /*
+            * Check the font we'll _probably_ be using to see if 
+            * the character is wide when we don't want it to be.
+            */
+           if ((tchar | tattr) != (term->disptext[idx]& ~ATTR_NARROW)) {
+               if ((tattr & ATTR_WIDE) == 0 && 
+                   char_width(ctx, (tchar | tattr) & 0xFFFF) == 2)
+                   tattr |= ATTR_NARROW;
+           } else if (term->disptext[idx]&ATTR_NARROW)
+               tattr |= ATTR_NARROW;
+
            /* Cursor here ? Save the 'background' */
-           if (i == our_curs_y && j == curs.x) {
+           if (i == our_curs_y && j == our_curs_x) {
                cursor_background = tattr | tchar;
-               dispcurs = disptext + idx;
+               term->dispcurs = term->disptext + idx;
            }
 
-           if ((disptext[idx] ^ tattr) & ATTR_WIDE)
+           if ((term->disptext[idx] ^ tattr) & ATTR_WIDE)
                dirty_line = TRUE;
 
-           break_run = (tattr != attr || j - start >= sizeof(ch));
+           break_run = (((tattr ^ attr) & term->attr_mask) ||
+               j - start >= sizeof(ch));
 
            /* Special hack for VT100 Linedraw glyphs */
            if ((attr & CSET_MASK) == 0x2300 && tchar >= 0xBA
                && tchar <= 0xBD) break_run = TRUE;
 
-           if (!dbcs_screenfont && !dirty_line) {
-               if ((tchar | tattr) == disptext[idx])
+           if (!term->ucsdata->dbcs_screenfont && !dirty_line) {
+               if ((tchar | tattr) == term->disptext[idx])
                    break_run = TRUE;
                else if (!dirty_run && ccount == 1)
                    break_run = TRUE;
@@ -2596,29 +3224,30 @@ static void do_paint(Context ctx, int may_optimise)
                start = j;
                ccount = 0;
                attr = tattr;
-               if (dbcs_screenfont)
+               if (term->ucsdata->dbcs_screenfont)
                    last_run_dirty = dirty_run;
                dirty_run = dirty_line;
            }
 
-           if ((tchar | tattr) != disptext[idx])
+           if ((tchar | tattr) != term->disptext[idx])
                dirty_run = TRUE;
            ch[ccount++] = (char) tchar;
-           disptext[idx] = tchar | tattr;
+           term->disptext[idx] = tchar | tattr;
 
            /* If it's a wide char step along to the next one. */
            if (tattr & ATTR_WIDE) {
-               if (++j < cols) {
+               if (++j < term->cols) {
                    idx++;
                    d++;
-                   /* Cursor is here ? Ouch! */
-                   if (i == our_curs_y && j == curs.x) {
-                       cursor_background = *d;
-                       dispcurs = disptext + idx;
-                   }
-                   if (disptext[idx] != *d)
+                   /*
+                    * By construction above, the cursor should not
+                    * be on the right-hand half of this character.
+                    * Ever.
+                    */
+                   assert(!(i == our_curs_y && j == our_curs_x));
+                   if (term->disptext[idx] != *d)
                        dirty_run = TRUE;
-                   disptext[idx] = *d;
+                   term->disptext[idx] = *d;
                }
            }
        }
@@ -2628,11 +3257,11 @@ static void do_paint(Context ctx, int may_optimise)
        }
 
        /* Cursor on this line ? (and changed) */
-       if (i == our_curs_y && (curstype != cursor || updated_line)) {
+       if (i == our_curs_y && (term->curstype != cursor || updated_line)) {
            ch[0] = (char) (cursor_background & CHAR_MASK);
            attr = (cursor_background & ATTR_MASK) | cursor;
-           do_cursor(ctx, curs.x, i, ch, 1, attr, lattr);
-           curstype = cursor;
+           do_cursor(ctx, our_curs_x, i, ch, 1, attr, lattr);
+           term->curstype = cursor;
        }
     }
 }
@@ -2641,73 +3270,74 @@ static void do_paint(Context ctx, int may_optimise)
  * Flick the switch that says if blinking things should be shown or hidden.
  */
 
-void term_blink(int flg)
+void term_blink(Terminal *term, int flg)
 {
-    static long last_blink = 0;
-    static long last_tblink = 0;
     long now, blink_diff;
 
-    now = GetTickCount();
-    blink_diff = now - last_tblink;
+    now = GETTICKCOUNT();
+    blink_diff = now - term->last_tblink;
 
-    /* Make sure the text blinks no more than 2Hz */
-    if (blink_diff < 0 || blink_diff > 450) {
-       last_tblink = now;
-       tblinker = !tblinker;
+    /* Make sure the text blinks no more than 2Hz; we'll use 0.45 s period. */
+    if (blink_diff < 0 || blink_diff > (TICKSPERSEC * 9 / 20)) {
+       term->last_tblink = now;
+       term->tblinker = !term->tblinker;
     }
 
     if (flg) {
-       blinker = 1;
-       last_blink = now;
+       term->blinker = 1;
+       term->last_blink = now;
        return;
     }
 
-    blink_diff = now - last_blink;
+    blink_diff = now - term->last_blink;
 
-    /* Make sure the cursor blinks no faster than GetCaretBlinkTime() */
-    if (blink_diff >= 0 && blink_diff < (long) GetCaretBlinkTime())
+    /* Make sure the cursor blinks no faster than system blink rate */
+    if (blink_diff >= 0 && blink_diff < (long) CURSORBLINK)
        return;
 
-    last_blink = now;
-    blinker = !blinker;
+    term->last_blink = now;
+    term->blinker = !term->blinker;
 }
 
 /*
  * Invalidate the whole screen so it will be repainted in full.
  */
-void term_invalidate(void)
+void term_invalidate(Terminal *term)
 {
     int i;
 
-    for (i = 0; i < rows * (cols + 1); i++)
-       disptext[i] = ATTR_INVALID;
+    for (i = 0; i < term->rows * (term->cols + 1); i++)
+       term->disptext[i] = ATTR_INVALID;
 }
 
 /*
  * Paint the window in response to a WM_PAINT message.
  */
-void term_paint(Context ctx, int l, int t, int r, int b)
+void term_paint(Terminal *term, Context ctx,
+               int left, int top, int right, int bottom, int immediately)
 {
-    int i, j, left, top, right, bottom;
-
-    left = l / font_width;
-    right = (r - 1) / font_width;
-    top = t / font_height;
-    bottom = (b - 1) / font_height;
-    for (i = top; i <= bottom && i < rows; i++) {
-       if ((disptext[i * (cols + 1) + cols] & LATTR_MODE) == LATTR_NORM)
-           for (j = left; j <= right && j < cols; j++)
-               disptext[i * (cols + 1) + j] = ATTR_INVALID;
+    int i, j;
+    if (left < 0) left = 0;
+    if (top < 0) top = 0;
+    if (right >= term->cols) right = term->cols-1;
+    if (bottom >= term->rows) bottom = term->rows-1;
+
+    for (i = top; i <= bottom && i < term->rows; i++) {
+       if ((term->disptext[i * (term->cols + 1) + term->cols] &
+            LATTR_MODE) == LATTR_NORM)
+           for (j = left; j <= right && j < term->cols; j++)
+               term->disptext[i * (term->cols + 1) + j] = ATTR_INVALID;
        else
-           for (j = left / 2; j <= right / 2 + 1 && j < cols; j++)
-               disptext[i * (cols + 1) + j] = ATTR_INVALID;
+           for (j = left / 2; j <= right / 2 + 1 && j < term->cols; j++)
+               term->disptext[i * (term->cols + 1) + j] = ATTR_INVALID;
     }
 
     /* This should happen soon enough, also for some reason it sometimes 
      * fails to actually do anything when re-sizing ... painting the wrong
      * window perhaps ?
-     do_paint (ctx, FALSE);
      */
+    if (immediately)
+        do_paint (term, ctx, FALSE);
 }
 
 /*
@@ -2717,39 +3347,61 @@ void term_paint(Context ctx, int l, int t, int r, int b)
  * to denote it is relative to the end, and 0 to denote that it is
  * relative to the current position.
  */
-void term_scroll(int rel, int where)
+void term_scroll(Terminal *term, int rel, int where)
 {
-    int sbtop = -count234(scrollback);
-
-    disptop = (rel < 0 ? 0 : rel > 0 ? sbtop : disptop) + where;
-    if (disptop < sbtop)
-       disptop = sbtop;
-    if (disptop > 0)
-       disptop = 0;
-    update_sbar();
-    term_update();
+    int sbtop = -count234(term->scrollback);
+#ifdef OPTIMISE_SCROLL
+    int olddisptop = term->disptop;
+    int shift;
+#endif /* OPTIMISE_SCROLL */
+
+    term->disptop = (rel < 0 ? 0 : rel > 0 ? sbtop : term->disptop) + where;
+    if (term->disptop < sbtop)
+       term->disptop = sbtop;
+    if (term->disptop > 0)
+       term->disptop = 0;
+    update_sbar(term);
+#ifdef OPTIMISE_SCROLL
+    shift = (term->disptop - olddisptop);
+    if (shift < term->rows && shift > -term->rows)
+       scroll_display(term, 0, term->rows - 1, shift);
+#endif /* OPTIMISE_SCROLL */
+    term_update(term);
 }
 
-static void clipme(pos top, pos bottom)
+static void clipme(Terminal *term, pos top, pos bottom, int rect)
 {
     wchar_t *workbuf;
     wchar_t *wbptr;                   /* where next char goes within workbuf */
+    int old_top_x;
     int wblen = 0;                    /* workbuf len */
     int buflen;                               /* amount of memory allocated to workbuf */
 
     buflen = 5120;                    /* Default size */
     workbuf = smalloc(buflen * sizeof(wchar_t));
     wbptr = workbuf;                  /* start filling here */
+    old_top_x = top.x;                /* needed for rect==1 */
 
     while (poslt(top, bottom)) {
        int nl = FALSE;
        unsigned long *ldata = lineptr(top.y);
        pos nlpos;
 
+       /*
+        * nlpos will point at the maximum position on this line we
+        * should copy up to. So we start it at the end of the
+        * line...
+        */
        nlpos.y = top.y;
-       nlpos.x = cols;
+       nlpos.x = term->cols;
 
-       if (!(ldata[cols] & LATTR_WRAPPED)) {
+       /*
+        * ... move it backwards if there's unused space at the end
+        * of the line (and also set `nl' if this is the case,
+        * because in normal selection mode this means we need a
+        * newline at the end)...
+        */
+       if (!(ldata[term->cols] & LATTR_WRAPPED)) {
            while (((ldata[nlpos.x - 1] & 0xFF) == 0x20 ||
                    (DIRECT_CHAR(ldata[nlpos.x - 1]) &&
                     (ldata[nlpos.x - 1] & CHAR_MASK) == 0x20))
@@ -2757,7 +3409,24 @@ static void clipme(pos top, pos bottom)
                decpos(nlpos);
            if (poslt(nlpos, bottom))
                nl = TRUE;
+       } else if (ldata[term->cols] & LATTR_WRAPPED2) {
+           /* Ignore the last char on the line in a WRAPPED2 line. */
+           decpos(nlpos);
        }
+
+       /*
+        * ... and then clip it to the terminal x coordinate if
+        * we're doing rectangular selection. (In this case we
+        * still did the above, so that copying e.g. the right-hand
+        * column from a table doesn't fill with spaces on the
+        * right.)
+        */
+       if (rect) {
+           if (nlpos.x > bottom.x)
+               nlpos.x = bottom.x;
+           nl = (top.y < bottom.y);
+       }
+
        while (poslt(top, bottom) && poslt(top, nlpos)) {
 #if 0
            char cbuf[16], *p;
@@ -2774,23 +3443,23 @@ static void clipme(pos top, pos bottom)
 
            switch (uc & CSET_MASK) {
              case ATTR_LINEDRW:
-               if (!cfg.rawcnp) {
-                   uc = unitab_xterm[uc & 0xFF];
+               if (!term->cfg.rawcnp) {
+                   uc = term->ucsdata->unitab_xterm[uc & 0xFF];
                    break;
                }
              case ATTR_ASCII:
-               uc = unitab_line[uc & 0xFF];
+               uc = term->ucsdata->unitab_line[uc & 0xFF];
                break;
              case ATTR_SCOACS:  
-               uc = unitab_scoacs[uc&0xFF]; 
+               uc = term->ucsdata->unitab_scoacs[uc&0xFF]; 
                break;
            }
            switch (uc & CSET_MASK) {
              case ATTR_ACP:
-               uc = unitab_font[uc & 0xFF];
+               uc = term->ucsdata->unitab_font[uc & 0xFF];
                break;
              case ATTR_OEMCP:
-               uc = unitab_oemcp[uc & 0xFF];
+               uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
                break;
            }
 
@@ -2801,19 +3470,17 @@ static void clipme(pos top, pos bottom)
 
            if (DIRECT_FONT(uc)) {
                if (c >= ' ' && c != 0x7F) {
-                   unsigned char buf[4];
+                   char buf[4];
                    WCHAR wbuf[4];
                    int rv;
-                   if (IsDBCSLeadByteEx(font_codepage, (BYTE) c)) {
+                   if (is_dbcs_leadbyte(term->ucsdata->font_codepage, (BYTE) c)) {
                        buf[0] = c;
-                       buf[1] = (unsigned char) ldata[top.x + 1];
-                       rv = MultiByteToWideChar(font_codepage,
-                                                0, buf, 2, wbuf, 4);
+                       buf[1] = (char) (0xFF & ldata[top.x + 1]);
+                       rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 2, wbuf, 4);
                        top.x++;
                    } else {
                        buf[0] = c;
-                       rv = MultiByteToWideChar(font_codepage,
-                                                0, buf, 1, wbuf, 4);
+                       rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 1, wbuf, 4);
                    }
 
                    if (rv > 0) {
@@ -2845,32 +3512,35 @@ static void clipme(pos top, pos bottom)
            }
        }
        top.y++;
-       top.x = 0;
+       top.x = rect ? old_top_x : 0;
     }
+#if SELECTION_NUL_TERMINATED
     wblen++;
     *wbptr++ = 0;
-    write_clip(workbuf, wblen, FALSE); /* transfer to clipboard */
+#endif
+    write_clip(term->frontend, workbuf, wblen, FALSE); /* transfer to clipbd */
     if (buflen > 0)                   /* indicates we allocated this buffer */
        sfree(workbuf);
 }
 
-void term_copyall(void)
+void term_copyall(Terminal *term)
 {
     pos top;
-    top.y = -count234(scrollback);
+    top.y = -count234(term->scrollback);
     top.x = 0;
-    clipme(top, curs);
+    clipme(term, top, term->curs, 0);
 }
 
 /*
- * The wordness array is mainly for deciding the disposition of the US-ASCII 
- * characters.
+ * The wordness array is mainly for deciding the disposition of the
+ * US-ASCII characters.
  */
-static int wordtype(int uc)
+static int wordtype(Terminal *term, int uc)
 {
-    static struct {
+    struct ucsword {
        int start, end, ctype;
-    } *wptr, ucs_words[] = {
+    };
+    static const struct ucsword ucs_words[] = {
        {
        128, 160, 0}, {
        161, 191, 1}, {
@@ -2934,31 +3604,39 @@ static int wordtype(int uc)
        {
        0, 0, 0}
     };
+    const struct ucsword *wptr;
 
     uc &= (CSET_MASK | CHAR_MASK);
 
     switch (uc & CSET_MASK) {
       case ATTR_LINEDRW:
-       uc = unitab_xterm[uc & 0xFF];
+       uc = term->ucsdata->unitab_xterm[uc & 0xFF];
        break;
       case ATTR_ASCII:
-       uc = unitab_line[uc & 0xFF];
+       uc = term->ucsdata->unitab_line[uc & 0xFF];
        break;
       case ATTR_SCOACS:  
-       uc = unitab_scoacs[uc&0xFF]; 
+       uc = term->ucsdata->unitab_scoacs[uc&0xFF]; 
        break;
     }
     switch (uc & CSET_MASK) {
       case ATTR_ACP:
-       uc = unitab_font[uc & 0xFF];
+       uc = term->ucsdata->unitab_font[uc & 0xFF];
        break;
       case ATTR_OEMCP:
-       uc = unitab_oemcp[uc & 0xFF];
+       uc = term->ucsdata->unitab_oemcp[uc & 0xFF];
        break;
     }
 
+    /* For DBCS font's I can't do anything usefull. Even this will sometimes
+     * fail as there's such a thing as a double width space. :-(
+     */
+    if (term->ucsdata->dbcs_screenfont &&
+       term->ucsdata->font_codepage == term->ucsdata->line_codepage)
+       return (uc != ' ');
+
     if (uc < 0x80)
-       return wordness[uc];
+       return term->wordness[uc];
 
     for (wptr = ucs_words; wptr->start; wptr++) {
        if (uc >= wptr->start && uc <= wptr->end)
@@ -2971,27 +3649,28 @@ static int wordtype(int uc)
 /*
  * Spread the selection outwards according to the selection mode.
  */
-static pos sel_spread_half(pos p, int dir)
+static pos sel_spread_half(Terminal *term, pos p, int dir)
 {
     unsigned long *ldata;
     short wvalue;
+    int topy = -count234(term->scrollback);
 
     ldata = lineptr(p.y);
 
-    switch (selmode) {
+    switch (term->selmode) {
       case SM_CHAR:
        /*
         * In this mode, every character is a separate unit, except
         * for runs of spaces at the end of a non-wrapping line.
         */
-       if (!(ldata[cols] & LATTR_WRAPPED)) {
-           unsigned long *q = ldata + cols;
+       if (!(ldata[term->cols] & LATTR_WRAPPED)) {
+           unsigned long *q = ldata + term->cols;
            while (q > ldata && (q[-1] & CHAR_MASK) == 0x20)
                q--;
-           if (q == ldata + cols)
+           if (q == ldata + term->cols)
                q--;
            if (p.x >= q - ldata)
-               p.x = (dir == -1 ? q - ldata : cols - 1);
+               p.x = (dir == -1 ? q - ldata : term->cols - 1);
        }
        break;
       case SM_WORD:
@@ -2999,46 +3678,94 @@ static pos sel_spread_half(pos p, int dir)
         * In this mode, the units are maximal runs of characters
         * whose `wordness' has the same value.
         */
-       wvalue = wordtype(ldata[p.x]);
+       wvalue = wordtype(term, UCSGET(ldata, p.x));
        if (dir == +1) {
-           while (p.x < cols && wordtype(ldata[p.x + 1]) == wvalue)
-               p.x++;
+           while (1) {
+               int maxcols = (ldata[term->cols] & LATTR_WRAPPED2 ?
+                              term->cols-1 : term->cols);
+               if (p.x < maxcols-1) {
+                   if (wordtype(term, UCSGET(ldata, p.x + 1)) == wvalue)
+                       p.x++;
+                   else
+                       break;
+               } else {
+                   if (ldata[term->cols] & LATTR_WRAPPED) {
+                       unsigned long *ldata2;
+                       ldata2 = lineptr(p.y+1);
+                       if (wordtype(term, UCSGET(ldata2, 0)) == wvalue) {
+                           p.x = 0;
+                           p.y++;
+                           ldata = ldata2;
+                       } else
+                           break;
+                   } else
+                       break;
+               }
+           }
        } else {
-           while (p.x > 0 && wordtype(ldata[p.x - 1]) == wvalue)
-               p.x--;
+           while (1) {
+               if (p.x > 0) {
+                   if (wordtype(term, UCSGET(ldata, p.x - 1)) == wvalue)
+                       p.x--;
+                   else
+                       break;
+               } else {
+                   unsigned long *ldata2;
+                   int maxcols;
+                   if (p.y <= topy)
+                       break;
+                   ldata2 = lineptr(p.y-1);
+                   maxcols = (ldata2[term->cols] & LATTR_WRAPPED2 ?
+                             term->cols-1 : term->cols);
+                   if (ldata2[term->cols] & LATTR_WRAPPED) {
+                       if (wordtype(term, UCSGET(ldata2, maxcols-1))
+                           == wvalue) {
+                           p.x = maxcols-1;
+                           p.y--;
+                           ldata = ldata2;
+                       } else
+                           break;
+                   } else
+                       break;
+               }
+           }
        }
        break;
       case SM_LINE:
        /*
         * In this mode, every line is a unit.
         */
-       p.x = (dir == -1 ? 0 : cols - 1);
+       p.x = (dir == -1 ? 0 : term->cols - 1);
        break;
     }
     return p;
 }
 
-static void sel_spread(void)
+static void sel_spread(Terminal *term)
 {
-    selstart = sel_spread_half(selstart, -1);
-    decpos(selend);
-    selend = sel_spread_half(selend, +1);
-    incpos(selend);
+    if (term->seltype == LEXICOGRAPHIC) {
+       term->selstart = sel_spread_half(term, term->selstart, -1);
+       decpos(term->selend);
+       term->selend = sel_spread_half(term, term->selend, +1);
+       incpos(term->selend);
+    }
 }
 
-void term_do_paste(void)
+void term_do_paste(Terminal *term)
 {
     wchar_t *data;
     int len;
 
-    get_clip(&data, &len);
-    if (data) {
+    get_clip(term->frontend, &data, &len);
+    if (data && len > 0) {
         wchar_t *p, *q;
 
-        if (paste_buffer)
-            sfree(paste_buffer);
-        paste_pos = paste_hold = paste_len = 0;
-        paste_buffer = smalloc(len * sizeof(wchar_t));
+       term_seen_key_event(term);     /* pasted data counts */
+
+        if (term->paste_buffer)
+            sfree(term->paste_buffer);
+        term->paste_pos = term->paste_hold = term->paste_len = 0;
+        term->paste_buffer = smalloc(len * sizeof(wchar_t));
 
         p = q = data;
         while (p < data + len) {
@@ -3050,251 +3777,327 @@ void term_do_paste(void)
             {
                 int i;
                 for (i = 0; i < p - q; i++) {
-                    paste_buffer[paste_len++] = q[i];
+                    term->paste_buffer[term->paste_len++] = q[i];
                 }
             }
 
             if (p <= data + len - sel_nl_sz &&
                 !memcmp(p, sel_nl, sizeof(sel_nl))) {
-                paste_buffer[paste_len++] = '\r';
+                term->paste_buffer[term->paste_len++] = '\015';
                 p += sel_nl_sz;
             }
             q = p;
         }
 
         /* Assume a small paste will be OK in one go. */
-        if (paste_len < 256) {
-            luni_send(paste_buffer, paste_len);
-            if (paste_buffer)
-                sfree(paste_buffer);
-            paste_buffer = 0;
-            paste_pos = paste_hold = paste_len = 0;
+        if (term->paste_len < 256) {
+            if (term->ldisc)
+               luni_send(term->ldisc, term->paste_buffer, term->paste_len, 0);
+            if (term->paste_buffer)
+                sfree(term->paste_buffer);
+            term->paste_buffer = 0;
+            term->paste_pos = term->paste_hold = term->paste_len = 0;
         }
     }
-    get_clip(NULL, NULL);
+    get_clip(term->frontend, NULL, NULL);
 }
 
-void term_mouse(Mouse_Button b, Mouse_Action a, int x, int y,
-               int shift, int ctrl)
+void term_mouse(Terminal *term, Mouse_Button b, Mouse_Action a, int x, int y,
+               int shift, int ctrl, int alt)
 {
     pos selpoint;
     unsigned long *ldata;
+    int raw_mouse = (term->xterm_mouse &&
+                    !term->cfg.no_mouse_rep &&
+                    !(term->cfg.mouse_override && shift));
+    int default_seltype;
 
-    if (y < 0)
+    if (y < 0) {
        y = 0;
-    if (y >= rows)
-       y = rows - 1;
+       if (a == MA_DRAG && !raw_mouse)
+           term_scroll(term, 0, -1);
+    }
+    if (y >= term->rows) {
+       y = term->rows - 1;
+       if (a == MA_DRAG && !raw_mouse)
+           term_scroll(term, 0, +1);
+    }
     if (x < 0) {
        if (y > 0) {
-           x = cols - 1;
+           x = term->cols - 1;
            y--;
        } else
            x = 0;
     }
-    if (x >= cols)
-       x = cols - 1;
+    if (x >= term->cols)
+       x = term->cols - 1;
 
-    selpoint.y = y + disptop;
+    selpoint.y = y + term->disptop;
     selpoint.x = x;
     ldata = lineptr(selpoint.y);
-    if ((ldata[cols] & LATTR_MODE) != LATTR_NORM)
+    if ((ldata[term->cols] & LATTR_MODE) != LATTR_NORM)
        selpoint.x /= 2;
 
-    if (xterm_mouse && !(cfg.mouse_override && shift)) {
+    if (raw_mouse) {
        int encstate = 0, r, c;
        char abuf[16];
-       static int is_down = 0;
 
-       switch (b) {
-         case MBT_LEFT:
-           encstate = 0x20;           /* left button down */
-           break;
-         case MBT_MIDDLE:
-           encstate = 0x21;
-           break;
-         case MBT_RIGHT:
-           encstate = 0x22;
-           break;
-         case MBT_WHEEL_UP:
-           encstate = 0x60;
-           break;
-         case MBT_WHEEL_DOWN:
-           encstate = 0x61;
-           break;
-         default: break;              /* placate gcc warning about enum use */
-       }
-       switch (a) {
-         case MA_DRAG:
-           if (xterm_mouse == 1)
-               return;
-           encstate += 0x20;
-           break;
-         case MA_RELEASE:
-           encstate = 0x23;
-           is_down = 0;
-           break;
-         case MA_CLICK:
-           if (is_down == b)
-               return;
-           is_down = b;
-           break;
-         default: break;              /* placate gcc warning about enum use */
+       if (term->ldisc) {
+
+           switch (b) {
+             case MBT_LEFT:
+               encstate = 0x20;               /* left button down */
+               break;
+             case MBT_MIDDLE:
+               encstate = 0x21;
+               break;
+             case MBT_RIGHT:
+               encstate = 0x22;
+               break;
+             case MBT_WHEEL_UP:
+               encstate = 0x60;
+               break;
+             case MBT_WHEEL_DOWN:
+               encstate = 0x61;
+               break;
+             default: break;          /* placate gcc warning about enum use */
+           }
+           switch (a) {
+             case MA_DRAG:
+               if (term->xterm_mouse == 1)
+                   return;
+               encstate += 0x20;
+               break;
+             case MA_RELEASE:
+               encstate = 0x23;
+               term->mouse_is_down = 0;
+               break;
+             case MA_CLICK:
+               if (term->mouse_is_down == b)
+                   return;
+               term->mouse_is_down = b;
+               break;
+             default: break;          /* placate gcc warning about enum use */
+           }
+           if (shift)
+               encstate += 0x04;
+           if (ctrl)
+               encstate += 0x10;
+           r = y + 33;
+           c = x + 33;
+
+           sprintf(abuf, "\033[M%c%c%c", encstate, c, r);
+           ldisc_send(term->ldisc, abuf, 6, 0);
        }
-       if (shift)
-           encstate += 0x04;
-       if (ctrl)
-           encstate += 0x10;
-       r = y + 33;
-       c = x + 33;
-
-       sprintf(abuf, "\033[M%c%c%c", encstate, c, r);
-       ldisc_send(abuf, 6);
        return;
     }
 
-    b = translate_button(b);
+    b = translate_button(term->frontend, b);
+
+    /*
+     * Set the selection type (rectangular or normal) at the start
+     * of a selection attempt, from the state of Alt.
+     */
+    if (!alt ^ !term->cfg.rect_select)
+       default_seltype = RECTANGULAR;
+    else
+       default_seltype = LEXICOGRAPHIC;
+       
+    if (term->selstate == NO_SELECTION) {
+       term->seltype = default_seltype;
+    }
 
     if (b == MBT_SELECT && a == MA_CLICK) {
-       deselect();
-       selstate = ABOUT_TO;
-       selanchor = selpoint;
-       selmode = SM_CHAR;
+       deselect(term);
+       term->selstate = ABOUT_TO;
+       term->seltype = default_seltype;
+       term->selanchor = selpoint;
+       term->selmode = SM_CHAR;
     } else if (b == MBT_SELECT && (a == MA_2CLK || a == MA_3CLK)) {
-       deselect();
-       selmode = (a == MA_2CLK ? SM_WORD : SM_LINE);
-       selstate = DRAGGING;
-       selstart = selanchor = selpoint;
-       selend = selstart;
-       incpos(selend);
-       sel_spread();
+       deselect(term);
+       term->selmode = (a == MA_2CLK ? SM_WORD : SM_LINE);
+       term->selstate = DRAGGING;
+       term->selstart = term->selanchor = selpoint;
+       term->selend = term->selstart;
+       incpos(term->selend);
+       sel_spread(term);
     } else if ((b == MBT_SELECT && a == MA_DRAG) ||
               (b == MBT_EXTEND && a != MA_RELEASE)) {
-       if (selstate == ABOUT_TO && poseq(selanchor, selpoint))
+       if (term->selstate == ABOUT_TO && poseq(term->selanchor, selpoint))
            return;
-       if (b == MBT_EXTEND && a != MA_DRAG && selstate == SELECTED) {
-           if (posdiff(selpoint, selstart) <
-               posdiff(selend, selstart) / 2) {
-               selanchor = selend;
-               decpos(selanchor);
+       if (b == MBT_EXTEND && a != MA_DRAG && term->selstate == SELECTED) {
+           if (term->seltype == LEXICOGRAPHIC) {
+               /*
+                * For normal selection, we extend by moving
+                * whichever end of the current selection is closer
+                * to the mouse.
+                */
+               if (posdiff(selpoint, term->selstart) <
+                   posdiff(term->selend, term->selstart) / 2) {
+                   term->selanchor = term->selend;
+                   decpos(term->selanchor);
+               } else {
+                   term->selanchor = term->selstart;
+               }
            } else {
-               selanchor = selstart;
+               /*
+                * For rectangular selection, we have a choice of
+                * _four_ places to put selanchor and selpoint: the
+                * four corners of the selection.
+                */
+               if (2*selpoint.x < term->selstart.x + term->selend.x)
+                   term->selanchor.x = term->selend.x-1;
+               else
+                   term->selanchor.x = term->selstart.x;
+
+               if (2*selpoint.y < term->selstart.y + term->selend.y)
+                   term->selanchor.y = term->selend.y;
+               else
+                   term->selanchor.y = term->selstart.y;
            }
-           selstate = DRAGGING;
+           term->selstate = DRAGGING;
        }
-       if (selstate != ABOUT_TO && selstate != DRAGGING)
-           selanchor = selpoint;
-       selstate = DRAGGING;
-       if (poslt(selpoint, selanchor)) {
-           selstart = selpoint;
-           selend = selanchor;
-           incpos(selend);
+       if (term->selstate != ABOUT_TO && term->selstate != DRAGGING)
+           term->selanchor = selpoint;
+       term->selstate = DRAGGING;
+       if (term->seltype == LEXICOGRAPHIC) {
+           /*
+            * For normal selection, we set (selstart,selend) to
+            * (selpoint,selanchor) in some order.
+            */
+           if (poslt(selpoint, term->selanchor)) {
+               term->selstart = selpoint;
+               term->selend = term->selanchor;
+               incpos(term->selend);
+           } else {
+               term->selstart = term->selanchor;
+               term->selend = selpoint;
+               incpos(term->selend);
+           }
        } else {
-           selstart = selanchor;
-           selend = selpoint;
-           incpos(selend);
+           /*
+            * For rectangular selection, we may need to
+            * interchange x and y coordinates (if the user has
+            * dragged in the -x and +y directions, or vice versa).
+            */
+           term->selstart.x = min(term->selanchor.x, selpoint.x);
+           term->selend.x = 1+max(term->selanchor.x, selpoint.x);
+           term->selstart.y = min(term->selanchor.y, selpoint.y);
+           term->selend.y =   max(term->selanchor.y, selpoint.y);
        }
-       sel_spread();
+       sel_spread(term);
     } else if ((b == MBT_SELECT || b == MBT_EXTEND) && a == MA_RELEASE) {
-       if (selstate == DRAGGING) {
+       if (term->selstate == DRAGGING) {
            /*
             * We've completed a selection. We now transfer the
             * data to the clipboard.
             */
-           clipme(selstart, selend);
-           selstate = SELECTED;
+           clipme(term, term->selstart, term->selend,
+                  (term->seltype == RECTANGULAR));
+           term->selstate = SELECTED;
        } else
-           selstate = NO_SELECTION;
+           term->selstate = NO_SELECTION;
     } else if (b == MBT_PASTE
-              && (a == MA_CLICK || a == MA_2CLK || a == MA_3CLK)) {
-        term_do_paste();
+              && (a == MA_CLICK
+#if MULTICLICK_ONLY_EVENT
+                  || a == MA_2CLK || a == MA_3CLK
+#endif
+                  )) {
+       request_paste(term->frontend);
     }
 
-    term_update();
+    term_update(term);
 }
 
-void term_nopaste()
+void term_nopaste(Terminal *term)
 {
-    if (paste_len == 0)
+    if (term->paste_len == 0)
        return;
-    sfree(paste_buffer);
-    paste_buffer = 0;
-    paste_len = 0;
+    sfree(term->paste_buffer);
+    term->paste_buffer = NULL;
+    term->paste_len = 0;
 }
 
-void term_paste()
+int term_paste_pending(Terminal *term)
+{
+    return term->paste_len != 0;
+}
+
+void term_paste(Terminal *term)
 {
-    static long last_paste = 0;
     long now, paste_diff;
 
-    if (paste_len == 0)
+    if (term->paste_len == 0)
        return;
 
     /* Don't wait forever to paste */
-    if (paste_hold) {
-       now = GetTickCount();
-       paste_diff = now - last_paste;
+    if (term->paste_hold) {
+       now = GETTICKCOUNT();
+       paste_diff = now - term->last_paste;
        if (paste_diff >= 0 && paste_diff < 450)
            return;
     }
-    paste_hold = 0;
+    term->paste_hold = 0;
 
-    while (paste_pos < paste_len) {
+    while (term->paste_pos < term->paste_len) {
        int n = 0;
-       while (n + paste_pos < paste_len) {
-           if (paste_buffer[paste_pos + n++] == '\r')
+       while (n + term->paste_pos < term->paste_len) {
+           if (term->paste_buffer[term->paste_pos + n++] == '\015')
                break;
        }
-       luni_send(paste_buffer + paste_pos, n);
-       paste_pos += n;
+       if (term->ldisc)
+           luni_send(term->ldisc, term->paste_buffer + term->paste_pos, n, 0);
+       term->paste_pos += n;
 
-       if (paste_pos < paste_len) {
-           paste_hold = 1;
+       if (term->paste_pos < term->paste_len) {
+           term->paste_hold = 1;
            return;
        }
     }
-    sfree(paste_buffer);
-    paste_buffer = 0;
-    paste_len = 0;
+    sfree(term->paste_buffer);
+    term->paste_buffer = NULL;
+    term->paste_len = 0;
 }
 
-static void deselect(void)
+static void deselect(Terminal *term)
 {
-    selstate = NO_SELECTION;
-    selstart.x = selstart.y = selend.x = selend.y = 0;
+    term->selstate = NO_SELECTION;
+    term->selstart.x = term->selstart.y = term->selend.x = term->selend.y = 0;
 }
 
-void term_deselect(void)
+void term_deselect(Terminal *term)
 {
-    deselect();
-    term_update();
+    deselect(term);
+    term_update(term);
 }
 
-int term_ldisc(int option)
+int term_ldisc(Terminal *term, int option)
 {
     if (option == LD_ECHO)
-       return term_echoing;
+       return term->term_echoing;
     if (option == LD_EDIT)
-       return term_editing;
+       return term->term_editing;
     return FALSE;
 }
 
 /*
  * from_backend(), to get data from the backend for the terminal.
  */
-int from_backend(int is_stderr, char *data, int len)
+int from_backend(void *vterm, int is_stderr, char *data, int len)
 {
-    while (len--) {
-       if (inbuf_head >= INBUF_SIZE)
-           term_out();
-       inbuf[inbuf_head++] = *data++;
-    }
+    Terminal *term = (Terminal *)vterm;
+
+    assert(len > 0);
+
+    bufchain_add(&term->inbuf, data, len);
 
     /*
-     * We process all stdout/stderr data immediately we receive it,
-     * and don't return until it's all gone. Therefore, there's no
-     * reason at all to return anything other than zero from this
-     * function.
-     * 
+     * term_out() always completely empties inbuf. Therefore,
+     * there's no reason at all to return anything other than zero
+     * from this function, because there _can't_ be a question of
+     * the remote side needing to wait until term_out() has cleared
+     * a backlog.
+     *
      * This is a slightly suboptimal way to deal with SSH2 - in
      * principle, the window mechanism would allow us to continue
      * to accept data on forwarded ports and X connections even
@@ -3304,78 +4107,13 @@ int from_backend(int is_stderr, char *data, int len)
      * portability. So we manage stdout buffering the old SSH1 way:
      * if the terminal processing goes slowly, the whole SSH
      * connection stops accepting data until it's ready.
-     * 
+     *
      * In practice, I can't imagine this causing serious trouble.
      */
     return 0;
 }
 
-/*
- * Log session traffic.
- */
-void logtraffic(unsigned char c, int logmode)
-{
-    if (cfg.logtype > 0) {
-       if (cfg.logtype == logmode) {
-           /* deferred open file from pgm start? */
-           if (!lgfp)
-               logfopen();
-           if (lgfp)
-               fputc(c, lgfp);
-       }
-    }
-}
-
-/* open log file append/overwrite mode */
-void logfopen(void)
-{
-    char buf[256];
-    time_t t;
-    struct tm *tm;
-    char writemod[4];
-
-    if (!cfg.logtype)
-       return;
-    sprintf(writemod, "wb");          /* default to rewrite */
-    lgfp = fopen(cfg.logfilename, "r");        /* file already present? */
-    if (lgfp) {
-       int i;
-       fclose(lgfp);
-       i = askappend(cfg.logfilename);
-       if (i == 1)
-           writemod[0] = 'a';         /* set append mode */
-       else if (i == 0) {             /* cancelled */
-           lgfp = NULL;
-           cfg.logtype = 0;           /* disable logging */
-           return;
-       }
-    }
-
-    lgfp = fopen(cfg.logfilename, writemod);
-    if (lgfp) {                               /* enter into event log */
-       sprintf(buf, "%s session log (%s mode) to file : ",
-               (writemod[0] == 'a') ? "Appending" : "Writing new",
-               (cfg.logtype == LGTYP_ASCII ? "ASCII" :
-                cfg.logtype == LGTYP_DEBUG ? "raw" : "<ukwn>"));
-       /* Make sure we do not exceed the output buffer size */
-       strncat(buf, cfg.logfilename, 128);
-       buf[strlen(buf)] = '\0';
-       logevent(buf);
-
-       /* --- write header line iinto log file */
-       fputs("=~=~=~=~=~=~=~=~=~=~=~= PuTTY log ", lgfp);
-       time(&t);
-       tm = localtime(&t);
-       strftime(buf, 24, "%Y.%m.%d %H:%M:%S", tm);
-       fputs(buf, lgfp);
-       fputs(" =~=~=~=~=~=~=~=~=~=~=~=\r\n", lgfp);
-    }
-}
-
-void logfclose(void)
+void term_provide_logctx(Terminal *term, void *logctx)
 {
-    if (lgfp) {
-       fclose(lgfp);
-       lgfp = NULL;
-    }
+    term->logctx = logctx;
 }