Richard B's patch for resize behaviour. The scrollback now contains
[u/mdw/putty] / terminal.c
index 5a6d50a..2a9470b 100644 (file)
 const wchar_t sel_nl[] = SEL_NL;
 
 /*
+ * Fetch the character at a particular position in a line array,
+ * for purposes of `wordtype'. The reason this isn't just a simple
+ * array reference is that if the character we find is UCSWIDE,
+ * then we must look one space further to the left.
+ */
+#define UCSGET(a, x) \
+    ( (x)>0 && ((a)[(x)] & (CHAR_MASK | CSET_MASK)) == UCSWIDE ? \
+       (a)[(x)-1] : (a)[(x)] )
+
+/*
  * Internal prototypes.
  */
+static unsigned long *resizeline(unsigned long *, int);
+static unsigned long *lineptr(Terminal *, int, int);
 static void do_paint(Terminal *, Context, int);
 static void erase_lots(Terminal *, int, int, int);
 static void swap_screen(Terminal *, int, int, int);
 static void update_sbar(Terminal *);
 static void deselect(Terminal *);
 static void term_print_finish(Terminal *);
+#ifdef OPTIMISE_SCROLL
+static void scroll_display(Terminal *, int, int, int);
+#endif /* OPTIMISE_SCROLL */
 
 /*
  * Resize a line to make it `cols' columns wide.
  */
-unsigned long *resizeline(unsigned long *line, int cols)
+static unsigned long *resizeline(unsigned long *line, int cols)
 {
     int i, oldlen;
     unsigned long lineattrs;
@@ -95,11 +110,24 @@ unsigned long *resizeline(unsigned long *line, int cols)
 }
 
 /*
+ * Get the number of lines in the scrollback.
+ */
+static int sblines(Terminal *term)
+{
+    int sblines = count234(term->scrollback);
+    if (term->cfg.erase_to_scrollback &&
+       term->alt_which && term->alt_screen) {
+           sblines += term->alt_sblines;
+    }
+    return sblines;
+}
+
+/*
  * Retrieve a line of the screen or of the scrollback, according to
  * whether the y coordinate is non-negative or negative
  * (respectively).
  */
-unsigned long *lineptr(Terminal *term, int y, int lineno)
+static unsigned long *lineptr(Terminal *term, int y, int lineno)
 {
     unsigned long *line, *newline;
     tree234 *whichtree;
@@ -109,8 +137,19 @@ unsigned long *lineptr(Terminal *term, int y, int lineno)
        whichtree = term->screen;
        treeindex = y;
     } else {
-       whichtree = term->scrollback;
-       treeindex = y + count234(term->scrollback);
+       int altlines = 0;
+       if (term->cfg.erase_to_scrollback &&
+           term->alt_which && term->alt_screen) {
+           altlines = term->alt_sblines;
+       }
+       if (y < -altlines) {
+           whichtree = term->scrollback;
+           treeindex = y + altlines + count234(term->scrollback);
+       } else {
+           whichtree = term->alt_screen;
+           treeindex = y + term->alt_sblines;
+           /* treeindex = y + count234(term->alt_screen); */
+       }
     }
     line = index234(whichtree, treeindex);
 
@@ -147,10 +186,10 @@ static void power_on(Terminal *term)
        for (i = 0; i < term->cols; i++)
            term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
     }
-    term->alt_om = term->dec_om = cfg.dec_om;
+    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 = cfg.wrap_mode;
+    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;
@@ -162,17 +201,17 @@ static void power_on(Terminal *term)
     term->big_cursor = 0;
     term->save_attr = term->curr_attr = ATTR_DEFAULT;
     term->term_editing = term->term_echoing = FALSE;
-    term->app_cursor_keys = cfg.app_cursor;
-    term->app_keypad_keys = cfg.app_keypad;
-    term->use_bce = cfg.bce;
-    term->blink_is_real = cfg.blinktext;
+    term->app_cursor_keys = term->cfg.app_cursor;
+    term->app_keypad_keys = term->cfg.app_keypad;
+    term->use_bce = term->cfg.bce;
+    term->blink_is_real = term->cfg.blinktext;
     term->erase_char = ERASE_CHAR;
     term->alt_which = 0;
     term_print_finish(term);
     {
        int i;
        for (i = 0; i < 256; i++)
-           term->wordness[i] = cfg.wordness[i];
+           term->wordness[i] = term->cfg.wordness[i];
     }
     if (term->screen) {
        swap_screen(term, 1, FALSE, FALSE);
@@ -188,10 +227,10 @@ static void power_on(Terminal *term)
 void term_update(Terminal *term)
 {
     Context ctx;
-    ctx = get_ctx();
+    ctx = get_ctx(term->frontend);
     if (ctx) {
        int need_sbar_update = term->seen_disp_event;
-       if (term->seen_disp_event && cfg.scroll_on_disp) {
+       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;
@@ -199,7 +238,7 @@ void term_update(Terminal *term)
        if (need_sbar_update)
            update_sbar(term);
        do_paint(term, ctx, TRUE);
-       sys_cursor(term->curs.x, term->curs.y - term->disptop);
+       sys_cursor(term->frontend, term->curs.x, term->curs.y - term->disptop);
        free_ctx(ctx);
     }
 }
@@ -229,7 +268,7 @@ void term_seen_key_event(Terminal *term)
     /*
      * Reset the scrollback on keypress, if we're doing that.
      */
-    if (cfg.scroll_on_key) {
+    if (term->cfg.scroll_on_key) {
        term->disptop = 0;             /* return to main screen */
        term->seen_disp_event = 1;
     }
@@ -241,7 +280,8 @@ void term_seen_key_event(Terminal *term)
 void term_pwron(Terminal *term)
 {
     power_on(term);
-    ldisc_send(NULL, 0, 0);           /* cause ldisc to notice changes */
+    if (term->ldisc)                  /* cause ldisc to notice changes */
+       ldisc_send(term->ldisc, NULL, 0, 0);
     fix_cpos;
     term->disptop = 0;
     deselect(term);
@@ -254,20 +294,53 @@ void term_pwron(Terminal *term)
  * user has disabled mouse reporting, and abandon a print job if
  * the user has disabled printing.
  */
-void term_reconfig(Terminal *term)
+void term_reconfig(Terminal *term, Config *cfg)
 {
-    if (cfg.no_alt_screen)
+    /*
+     * 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 (cfg.no_mouse_rep) {
+    if (term->cfg.no_mouse_rep) {
        term->xterm_mouse = 0;
-       set_raw_mouse_mode(0);
+       set_raw_mouse_mode(term->frontend, 0);
     }
-    if (cfg.no_remote_charset) {
+    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 (!*cfg.printer) {
+    if (!*term->cfg.printer) {
        term_print_finish(term);
     }
 }
@@ -282,13 +355,16 @@ void term_clrsb(Terminal *term)
     while ((line = delpos234(term->scrollback, 0)) != NULL) {
        sfree(line);
     }
+    term->tempsblines = 0;
+    term->alt_sblines = 0;
     update_sbar(term);
 }
 
 /*
  * Initialise the terminal.
  */
-Terminal *term_init(void)
+Terminal *term_init(Config *mycfg, struct unicode_data *ucsdata,
+                   void *frontend)
 {
     Terminal *term;
 
@@ -297,10 +373,15 @@ Terminal *term_init(void)
      * 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);
@@ -309,15 +390,18 @@ Terminal *term_init(void)
     term->vt52_mode = FALSE;
     term->cr_lf_return = FALSE;
     term->seen_disp_event = FALSE;
-    term->xterm_mouse = 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->tempsblines = 0;
+    term->alt_sblines = 0;
     term->disptop = 0;
     term->disptext = term->dispcurs = NULL;
     term->tabs = NULL;
@@ -325,15 +409,47 @@ Terminal *term_init(void)
     term->rows = term->cols = -1;
     power_on(term);
     term->beephead = term->beeptail = NULL;
+#ifdef OPTIMISE_SCROLL
+    term->scrollhead = term->scrolltail = NULL;
+#endif /* OPTIMISE_SCROLL */
     term->nbeeps = 0;
     term->lastbeep = FALSE;
     term->beep_overloaded = FALSE;
+    term->attr_mask = 0xffffffff;
     term->resize_fn = NULL;
     term->resize_ctx = NULL;
 
     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.
  */
@@ -358,6 +474,7 @@ void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
     if (term->rows == -1) {
        term->scrollback = newtree234(NULL);
        term->screen = newtree234(NULL);
+       term->tempsblines = 0;
        term->rows = 0;
     }
 
@@ -367,15 +484,14 @@ void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
      * will take care of resizing each individual line if
      * necessary. So:
      * 
-     *  - If the new screen and the old screen differ in length, we
-     *    must shunt some lines in from the scrollback or out to
-     *    the scrollback.
-     * 
-     *  - If doing that fails to provide us with enough material to
-     *    fill the new screen (i.e. the number of rows needed in
-     *    the new screen exceeds the total number in the previous
-     *    screen+scrollback), we must invent some blank lines to
-     *    cover the gap.
+     *  - If the new screen is longer, we shunt lines in from temporary
+     *    scrollback if possible, otherwise we add new blank lines at
+     *    the bottom.
+     *
+     *  - If the new screen is shorter, we remove any blank lines at
+     *    the bottom if possible, otherwise shunt lines above the cursor
+     *    to scrollback if possible, otherwise delete lines below the
+     *    cursor.
      * 
      *  - Then, if the new scrollback length is less than the
      *    amount of scrollback we actually have, we must throw some
@@ -383,31 +499,58 @@ void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
      */
     sblen = count234(term->scrollback);
     /* Do this loop to expand the screen if newrows > rows */
-    for (i = term->rows; i < newrows; i++) {
-       if (sblen > 0) {
+    assert(term->rows == count234(term->screen));
+    while (term->rows < newrows) {
+       if (term->tempsblines > 0) {
+           /* Insert a line from the scrollback at the top of the screen. */
+           assert(sblen >= term->tempsblines);
            line = delpos234(term->scrollback, --sblen);
+           term->tempsblines -= 1;
+           addpos234(term->screen, line, 0);
+           term->curs.y += 1;
+           term->savecurs.y += 1;
        } else {
+           /* Add a new blank line at the bottom of the screen. */
            line = smalloc(TSIZE * (newcols + 2));
            line[0] = newcols;
-           for (j = 0; j <= newcols; j++)
+           for (j = 0; j < newcols; j++)
                line[j + 1] = ERASE_CHAR;
+            line[newcols + 1] = LATTR_NORM;
+           addpos234(term->screen, line, count234(term->screen));
        }
-       addpos234(term->screen, line, 0);
+       term->rows += 1;
     }
     /* Do this loop to shrink the screen if newrows < rows */
-    for (i = newrows; i < term->rows; i++) {
-       line = delpos234(term->screen, 0);
-       addpos234(term->scrollback, line, sblen++);
+    while (term->rows > newrows) {
+       if (term->curs.y < term->rows - 1) {
+           /* delete bottom row, unless it contains the cursor */
+           sfree(delpos234(term->screen, term->rows - 1));
+       } else {
+           /* push top row to scrollback */
+           line = delpos234(term->screen, 0);
+           addpos234(term->scrollback, line, sblen++);
+           term->tempsblines += 1;
+           term->curs.y -= 1;
+           term->savecurs.y -= 1;
+       }
+       term->rows -= 1;
     }
+    assert(term->rows == newrows);
     assert(count234(term->screen) == newrows);
+
+    /* Delete any excess lines from the scrollback. */
     while (sblen > newsavelines) {
        line = delpos234(term->scrollback, 0);
        sfree(line);
        sblen--;
     }
+    if (sblen < term->tempsblines)
+       term->tempsblines = sblen;
     assert(count234(term->scrollback) <= newsavelines);
+    assert(count234(term->scrollback) >= term->tempsblines);
     term->disptop = 0;
 
+    /* Make a new displayed text buffer. */
     newdisp = smalloc(newrows * (newcols + 1) * TSIZE);
     for (i = 0; i < newrows * (newcols + 1); i++)
        newdisp[i] = ATTR_INVALID;
@@ -415,12 +558,14 @@ void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
     term->disptext = newdisp;
     term->dispcurs = NULL;
 
+    /* Make a new alternate screen. */
     newalt = newtree234(NULL);
     for (i = 0; i < newrows; i++) {
        line = smalloc(TSIZE * (newcols + 2));
        line[0] = newcols;
-       for (j = 0; j <= newcols; j++)
+       for (j = 0; j < newcols; j++)
            line[j + 1] = term->erase_char;
+        line[newcols + 1] = LATTR_NORM;
        addpos234(newalt, line, i);
     }
     if (term->alt_screen) {
@@ -429,6 +574,7 @@ void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
        freetree234(term->alt_screen);
     }
     term->alt_screen = newalt;
+    term->alt_sblines = 0;
 
     term->tabs = srealloc(term->tabs, newcols * sizeof(*term->tabs));
     {
@@ -437,8 +583,11 @@ void term_size(Terminal *term, int newrows, int newcols, int newsavelines)
            term->tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
     }
 
-    if (term->rows > 0)
-       term->curs.y += newrows - term->rows;
+    /* Check that the cursor positions are still valid. */
+    if (term->savecurs.y < 0)
+       term->savecurs.y = 0;
+    if (term->savecurs.y >= newrows)
+       term->savecurs.y = newrows - 1;
     if (term->curs.y < 0)
        term->curs.y = 0;
     if (term->curs.y >= newrows)
@@ -475,6 +624,25 @@ void term_provide_resize_fn(Terminal *term,
        resize_fn(resize_ctx, term->cols, term->rows);
 }
 
+/* Find the bottom line on the screen that has any content.
+ * If only the top line has content, returns 0.
+ * If no lines have content, return -1.
+ */ 
+static int find_last_nonempty_line(Terminal * term, tree234 * screen)
+{
+    int i;
+    for (i = count234(screen) - 1; i >= 0; i--) {
+       unsigned long *line = index234(screen, i);
+       int j;
+       int cols = line[0];
+       for (j = 0; j < cols; j++) {
+           if (line[j + 1] != term->erase_char) break;
+       }
+       if (j != cols) break;
+    }
+    return i;
+}
+
 /*
  * Swap screens. If `reset' is TRUE and we have been asked to
  * switch to the alternate screen, we must bring most of its
@@ -496,6 +664,7 @@ static void swap_screen(Terminal *term, int which, int reset, int keep_cur_pos)
        ttr = term->alt_screen;
        term->alt_screen = term->screen;
        term->screen = ttr;
+       term->alt_sblines = find_last_nonempty_line(term, term->alt_screen) + 1;
        t = term->curs.x;
        if (!reset && !keep_cur_pos)
            term->curs.x = term->alt_x;
@@ -553,11 +722,9 @@ static void swap_screen(Terminal *term, int which, int reset, int keep_cur_pos)
  */
 static void update_sbar(Terminal *term)
 {
-    int nscroll;
-
-    nscroll = count234(term->scrollback);
-
-    set_sbar(nscroll + term->rows, nscroll + term->disptop, term->rows);
+    int nscroll = sblines(term);
+    set_sbar(term->frontend, nscroll + term->rows,
+            nscroll + term->disptop, term->rows);
 }
 
 /*
@@ -583,11 +750,13 @@ static void check_selection(Terminal *term, pos from, pos to)
 static void scroll(Terminal *term, int topline, int botline, int lines, int sb)
 {
     unsigned long *line, *line2;
-    int i, seltop;
+    int i, seltop, olddisptop, shift;
 
     if (topline != 0 || term->alt_which != 0)
        sb = FALSE;
 
+    olddisptop = term->disptop;
+    shift = lines;
     if (lines < 0) {
        while (lines < 0) {
            line = delpos234(term->screen, botline);
@@ -630,6 +799,7 @@ static void scroll(Terminal *term, int topline, int botline, int lines, int sb)
                } else {
                    line2 = smalloc(TSIZE * (term->cols + 2));
                    line2[0] = term->cols;
+                   term->tempsblines += 1;
                }
                addpos234(term->scrollback, line, sblen);
                line = line2;
@@ -654,7 +824,7 @@ static void scroll(Terminal *term, int topline, int botline, int lines, int sb)
             line = resizeline(line, term->cols);
            for (i = 0; i < term->cols; i++)
                line[i + 1] = term->erase_char;
-           line[term->cols + 1] = 0;
+           line[term->cols + 1] = LATTR_NORM;
            addpos234(term->screen, line, botline);
 
            /*
@@ -696,7 +866,72 @@ static void scroll(Terminal *term, int topline, int botline, int lines, int sb)
            lines--;
        }
     }
+#ifdef OPTIMISE_SCROLL
+    shift += term->disptop - olddisptop;
+    if (shift < term->rows && shift > -term->rows && shift != 0)
+       scroll_display(term, topline, botline, shift);
+#endif /* OPTIMISE_SCROLL */
+}
+
+#ifdef OPTIMISE_SCROLL
+/*
+ * Add a scroll of a region on the screen into the pending scroll list.
+ * `lines' is +ve for scrolling forward, -ve for backward.
+ *
+ * If the scroll is on the same area as the last scroll in the list,
+ * merge them.
+ */
+static void save_scroll(Terminal *term, int topline, int botline, int lines)
+{
+    struct scrollregion *newscroll;
+    if (term->scrolltail &&
+       term->scrolltail->topline == topline && 
+       term->scrolltail->botline == botline) {
+       term->scrolltail->lines += lines;
+    } else {
+       newscroll = smalloc(sizeof(struct scrollregion));
+       newscroll->topline = topline;
+       newscroll->botline = botline;
+       newscroll->lines = lines;
+       newscroll->next = NULL;
+
+       if (!term->scrollhead)
+           term->scrollhead = newscroll;
+       else
+           term->scrolltail->next = newscroll;
+       term->scrolltail = newscroll;
+    }
+}
+
+/*
+ * Scroll the physical display, and our conception of it in disptext.
+ */
+static void scroll_display(Terminal *term, int topline, int botline, int lines)
+{
+    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;
+    }
+    save_scroll(term, topline, botline, lines);
 }
+#endif /* OPTIMISE_SCROLL */
 
 /*
  * Move the cursor to a given position, clipping at boundaries. We
@@ -770,6 +1005,44 @@ static void save_cursor(Terminal *term, int save)
 }
 
 /*
+ * This function is called before doing _anything_ which affects
+ * only part of a line of text. It is used to mark the boundary
+ * between two character positions, and it indicates that some sort
+ * of effect is going to happen on only one side of that boundary.
+ * 
+ * The effect of this function is to check whether a CJK
+ * double-width character is straddling the boundary, and to remove
+ * it and replace it with two spaces if so. (Of course, one or
+ * other of those spaces is then likely to be replaced with
+ * something else again, as a result of whatever happens next.)
+ * 
+ * Also, if the boundary is at the right-hand _edge_ of the screen,
+ * it implies something deliberate is being done to the rightmost
+ * column position; hence we must clear LATTR_WRAPPED2.
+ * 
+ * The input to the function is the coordinates of the _second_
+ * character of the pair.
+ */
+static void check_boundary(Terminal *term, int x, int y)
+{
+    unsigned long *ldata;
+
+    /* Validate input coordinates, just in case. */
+    if (x == 0 || x > term->cols)
+       return;
+
+    ldata = lineptr(y);
+    if (x == term->cols) {
+       ldata[x] &= ~LATTR_WRAPPED2;
+    } else {
+       if ((ldata[x] & (CHAR_MASK | CSET_MASK)) == UCSWIDE) {
+           ldata[x-1] = ldata[x] =
+               (ldata[x-1] &~ (CHAR_MASK | CSET_MASK)) | ATTR_ASCII | ' ';
+       }
+    }
+}
+
+/*
  * Erase a large portion of the screen: the whole screen, or the
  * whole line, or parts thereof.
  */
@@ -778,7 +1051,7 @@ static void erase_lots(Terminal *term,
 {
     pos start, end;
     int erase_lattr;
-    unsigned long *ldata;
+    int erasing_lines_from_top = 0;
 
     if (line_only) {
        start.y = term->curs.y;
@@ -800,21 +1073,52 @@ static void erase_lots(Terminal *term,
        end = term->curs;
        incpos(end);
     }
+    if (!from_begin || !to_end)
+       check_boundary(term, term->curs.x, term->curs.y);
     check_selection(term, start, end);
 
     /* Clear screen also forces a full window redraw, just in case. */
     if (start.y == 0 && start.x == 0 && end.y == term->rows)
        term_invalidate(term);
 
-    ldata = lineptr(start.y);
-    while (poslt(start, end)) {
-       if (start.x == term->cols && !erase_lattr)
-           ldata[start.x] &= ~LATTR_WRAPPED;
-       else
-           ldata[start.x] = term->erase_char;
-       if (incpos(start) && start.y < term->rows)
-           ldata = lineptr(start.y);
+    /* Lines scrolled away shouldn't be brought back on if the terminal
+     * resizes. */
+    if (start.y == 0 && start.x == 0 && end.x == 0 && erase_lattr)
+       erasing_lines_from_top = 1;
+
+    if (term->cfg.erase_to_scrollback && erasing_lines_from_top) {
+       /* If it's a whole number of lines, starting at the top, and
+        * we're fully erasing them, erase by scrolling and keep the
+        * lines in the scrollback. */
+       int scrolllines = end.y;
+       if (end.y == term->rows) {
+           /* Shrink until we find a non-empty row.*/
+           scrolllines = find_last_nonempty_line(term, term->screen) + 1;
+       }
+       if (scrolllines > 0)
+           scroll(term, 0, scrolllines - 1, scrolllines, TRUE);
+       fix_cpos;
+    } else {
+       unsigned long *ldata = lineptr(start.y);
+       while (poslt(start, end)) {
+           if (start.x == term->cols) {
+               if (!erase_lattr)
+                   ldata[start.x] &= ~(LATTR_WRAPPED | LATTR_WRAPPED2);
+               else
+                   ldata[start.x] = LATTR_NORM;
+           } else {
+               ldata[start.x] = term->erase_char;
+           }
+           if (incpos(start) && start.y < term->rows)
+               ldata = lineptr(start.y);
+       }
     }
+
+    /* After an erase of lines from the top of the screen, we shouldn't
+     * bring the lines back again if the terminal enlarges (since the user or
+     * application has explictly thrown them away). */
+    if (erasing_lines_from_top && !(term->alt_which))
+       term->tempsblines = 0;
 }
 
 /*
@@ -835,6 +1139,9 @@ static void insch(Terminal *term, int n)
     cursplus.y = term->curs.y;
     cursplus.x = term->curs.x + n;
     check_selection(term, term->curs, cursplus);
+    check_boundary(term, term->curs.x, term->curs.y);
+    if (dir < 0)
+       check_boundary(term, term->curs.x + n, term->curs.y);
     ldata = lineptr(term->curs.y);
     if (dir < 0) {
        memmove(ldata + term->curs.x, ldata + term->curs.x + n, m * TSIZE);
@@ -866,13 +1173,13 @@ static void toggle_mode(Terminal *term, int mode, int query, int state)
                term->blink_is_real = FALSE;
                term->vt52_bold = FALSE;
            } else {
-               term->blink_is_real = cfg.blinktext;
+               term->blink_is_real = term->cfg.blinktext;
            }
            break;
          case 3:                      /* 80/132 columns */
            deselect(term);
-           if (!cfg.no_remote_resize)
-               request_resize(state ? 132 : 80, term->rows);
+           if (!term->cfg.no_remote_resize)
+               request_resize(term->frontend, state ? 132 : 80, term->rows);
            term->reset_132 = state;
            break;
          case 5:                      /* reverse video */
@@ -915,7 +1222,8 @@ static void toggle_mode(Terminal *term, int mode, int query, int state)
            break;
          case 10:                     /* set local edit mode */
            term->term_editing = state;
-           ldisc_send(NULL, 0, 0);    /* cause ldisc to notice changes */
+           if (term->ldisc)           /* cause ldisc to notice changes */
+               ldisc_send(term->ldisc, NULL, 0, 0);
            break;
          case 25:                     /* enable/disable cursor */
            compatibility2(OTHER, VT220);
@@ -925,21 +1233,21 @@ static void toggle_mode(Terminal *term, int mode, int query, int state)
          case 47:                     /* alternate screen */
            compatibility(OTHER);
            deselect(term);
-           swap_screen(term, cfg.no_alt_screen ? 0 : state, FALSE, FALSE);
+           swap_screen(term, term->cfg.no_alt_screen ? 0 : state, FALSE, FALSE);
            term->disptop = 0;
            break;
          case 1000:                   /* xterm mouse 1 */
            term->xterm_mouse = state ? 1 : 0;
-           set_raw_mouse_mode(state);
+           set_raw_mouse_mode(term->frontend, state);
            break;
          case 1002:                   /* xterm mouse 2 */
            term->xterm_mouse = state ? 2 : 0;
-           set_raw_mouse_mode(state);
+           set_raw_mouse_mode(term->frontend, state);
            break;
          case 1047:                   /* alternate screen */
            compatibility(OTHER);
            deselect(term);
-           swap_screen(term, cfg.no_alt_screen ? 0 : state, TRUE, TRUE);
+           swap_screen(term, term->cfg.no_alt_screen ? 0 : state, TRUE, TRUE);
            term->disptop = 0;
            break;
          case 1048:                   /* save/restore cursor */
@@ -952,7 +1260,7 @@ static void toggle_mode(Terminal *term, int mode, int query, int state)
            if (!state) term->seen_disp_event = TRUE;
            compatibility(OTHER);
            deselect(term);
-           swap_screen(term, cfg.no_alt_screen ? 0 : state, TRUE, FALSE);
+           swap_screen(term, term->cfg.no_alt_screen ? 0 : state, TRUE, FALSE);
            if (!state)
                save_cursor(term, state);
            term->disptop = 0;
@@ -965,7 +1273,8 @@ static void toggle_mode(Terminal *term, int mode, int query, int state)
            break;
          case 12:                     /* set echo mode */
            term->term_echoing = !state;
-           ldisc_send(NULL, 0, 0);    /* cause ldisc to notice changes */
+           if (term->ldisc)           /* cause ldisc to notice changes */
+               ldisc_send(term->ldisc, NULL, 0, 0);
            break;
          case 20:                     /* Return sends ... */
            term->cr_lf_return = state;
@@ -990,15 +1299,15 @@ static void do_osc(Terminal *term)
        switch (term->esc_args[0]) {
          case 0:
          case 1:
-           if (!cfg.no_remote_wintitle)
-               set_icon(term->osc_string);
+           if (!term->cfg.no_remote_wintitle)
+               set_icon(term->frontend, term->osc_string);
            if (term->esc_args[0] == 1)
                break;
            /* fall through: parameter 0 means set both */
          case 2:
          case 21:
-           if (!cfg.no_remote_wintitle)
-               set_title(term->osc_string);
+           if (!term->cfg.no_remote_wintitle)
+               set_title(term->frontend, term->osc_string);
            break;
        }
     }
@@ -1010,7 +1319,7 @@ static void do_osc(Terminal *term)
 static void term_print_setup(Terminal *term)
 {
     bufchain_clear(&term->printer_buf);
-    term->print_job = printer_start_job(cfg.printer);
+    term->print_job = printer_start_job(term->cfg.printer);
 }
 static void term_print_flush(Terminal *term)
 {
@@ -1084,8 +1393,8 @@ void term_out(Terminal *term)
             * Optionally log the session traffic to a file. Useful for
             * debugging and possibly also useful for actual logging.
             */
-           if (cfg.logtype == LGTYP_DEBUG)
-               logtraffic((unsigned char) c, LGTYP_DEBUG);
+           if (term->cfg.logtype == LGTYP_DEBUG && term->logctx)
+               logtraffic(term->logctx, (unsigned char) c, LGTYP_DEBUG);
        } else {
            c = unget;
            unget = -1;
@@ -1135,8 +1444,8 @@ void term_out(Terminal *term)
                  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) {
@@ -1220,9 +1529,9 @@ void term_out(Terminal *term)
            }
            /* Are we in the nasty ACS mode? Note: no sco in utf mode. */
            else if(term->sco_acs && 
-                   (c!='\033' && c!='\n' && c!='\r' && c!='\b'))
+                   (c!='\033' && c!='\012' && c!='\015' && c!='\b'))
            {
-              if (term->sco_acs == 2) c ^= 0x80;
+              if (term->sco_acs == 2) c |= 0x80;
               c |= ATTR_SCOACS;
            } else {
                switch (term->cset_attr[term->cset]) {
@@ -1233,8 +1542,8 @@ void term_out(Terminal *term)
                     * 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;
@@ -1246,8 +1555,8 @@ void term_out(Terminal *term)
                        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;
@@ -1272,7 +1581,7 @@ void term_out(Terminal *term)
                term->curs.x--;
            term->wrapnext = FALSE;
            fix_cpos;
-           if (!cfg.no_dbackspace)    /* destructive bksp might be disabled */
+           if (!term->cfg.no_dbackspace)    /* destructive bksp might be disabled */
                *term->cpos = (' ' | term->curr_attr | ATTR_ASCII);
        } else
            /* Or normal C0 controls. */
@@ -1288,10 +1597,10 @@ void term_out(Terminal *term)
                 * 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));
@@ -1306,7 +1615,8 @@ void term_out(Terminal *term)
                        } else
                            *d++ = *s;
                    }
-                   lpage_send(DEFAULT_CODEPAGE, abuf, d - abuf, 0);
+                   lpage_send(term->ldisc, DEFAULT_CODEPAGE,
+                              abuf, d - abuf, 0);
                }
                break;
              case '\007':
@@ -1333,7 +1643,7 @@ void term_out(Terminal *term)
                     * t seconds ago.
                     */
                    while (term->beephead &&
-                          term->beephead->ticks < ticks - cfg.bellovl_t) {
+                          term->beephead->ticks < ticks - term->cfg.bellovl_t) {
                        struct beeptime *tmp = term->beephead;
                        term->beephead = tmp->next;
                        sfree(tmp);
@@ -1342,16 +1652,16 @@ void term_out(Terminal *term)
                        term->nbeeps--;
                    }
 
-                   if (cfg.bellovl && term->beep_overloaded &&
-                       ticks - term->lastbeep >= (unsigned)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.
                         */
                        term->beep_overloaded = FALSE;
-                   } else if (cfg.bellovl && !term->beep_overloaded &&
-                              term->nbeeps >= cfg.bellovl_n) {
+                   } 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
@@ -1364,13 +1674,13 @@ void term_out(Terminal *term)
                    /*
                     * Perform an actual beep if we're not overloaded.
                     */
-                   if (!cfg.bellovl || !term->beep_overloaded) {
-                       if (cfg.beep == BELL_VISUAL) {
+                   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);
-                       } else
-                           beep(cfg.beep);
+                       }
                    }
                    term->disptop = 0;
                }
@@ -1405,13 +1715,14 @@ void term_out(Terminal *term)
                    term->esc_query = FALSE;
                }
                break;
-             case '\r':
+             case '\015':
                term->curs.x = 0;
                term->wrapnext = FALSE;
                fix_cpos;
                term->seen_disp_event = TRUE;
                term->paste_hold = 0;
-               logtraffic((unsigned char) c, LGTYP_ASCII);
+               if (term->logctx)
+                   logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
                break;
              case '\014':
                if (has_compat(SCOANSI)) {
@@ -1424,18 +1735,19 @@ void term_out(Terminal *term)
                }
              case '\013':
                compatibility(VT100);
-             case '\n':
+             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 (cfg.lfhascr)
+               if (term->cfg.lfhascr)
                    term->curs.x = 0;
                fix_cpos;
                term->wrapnext = FALSE;
                term->seen_disp_event = 1;
                term->paste_hold = 0;
-               logtraffic((unsigned char) c, LGTYP_ASCII);
+               if (term->logctx)
+                   logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
                break;
              case '\t':
                {
@@ -1483,10 +1795,10 @@ void term_out(Terminal *term)
                    incpos(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;
@@ -1494,9 +1806,30 @@ void term_out(Terminal *term)
                        width = wcwidth((wchar_t) c);
                    switch (width) {
                      case 2:
-                       *term->cpos++ = c | term->curr_attr;
-                       if (++term->curs.x == term->cols) {
-                           *term->cpos |= LATTR_WRAPPED;
+                       /*
+                        * 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);
@@ -1504,10 +1837,17 @@ void term_out(Terminal *term)
                                term->curs.y++;
                            term->curs.x = 0;
                            fix_cpos;
+                           /* Now we must check_boundary again, of course. */
+                           check_boundary(term, term->curs.x, term->curs.y);
+                           check_boundary(term, term->curs.x+2, term->curs.y);
                        }
+                       *term->cpos++ = c | term->curr_attr;
                        *term->cpos++ = UCSWIDE | term->curr_attr;
+                       term->curs.x++;
                        break;
                      case 1:
+                       check_boundary(term, term->curs.x, term->curs.y);
+                       check_boundary(term, term->curs.x+1, term->curs.y);
                        *term->cpos++ = c | term->curr_attr;
                        break;
                      default:
@@ -1617,15 +1957,18 @@ void term_out(Terminal *term)
                    break;
                  case 'Z':            /* terminal type query */
                    compatibility(VT100);
-                   ldisc_send(term->id_string, strlen(term->id_string), 0);
+                   if (term->ldisc)
+                       ldisc_send(term->ldisc, term->id_string,
+                                  strlen(term->id_string), 0);
                    break;
                  case 'c':            /* restore power-on settings */
                    compatibility(VT100);
                    power_on(term);
-                   ldisc_send(NULL, 0, 0);/* cause ldisc to notice changes */
+                   if (term->ldisc)   /* cause ldisc to notice changes */
+                       ldisc_send(term->ldisc, NULL, 0, 0);
                    if (term->reset_132) {
-                       if (!cfg.no_remote_resize)
-                           request_resize(80, term->rows);
+                       if (!term->cfg.no_remote_resize)
+                           request_resize(term->frontend, 80, term->rows);
                        term->reset_132 = 0;
                    }
                    fix_cpos;
@@ -1689,55 +2032,55 @@ void term_out(Terminal *term)
 
                  case ANSI('A', '('):
                    compatibility(VT100);
-                   if (!cfg.no_remote_charset)
+                   if (!term->cfg.no_remote_charset)
                        term->cset_attr[0] = ATTR_GBCHR;
                    break;
                  case ANSI('B', '('):
                    compatibility(VT100);
-                   if (!cfg.no_remote_charset)
+                   if (!term->cfg.no_remote_charset)
                        term->cset_attr[0] = ATTR_ASCII;
                    break;
                  case ANSI('0', '('):
                    compatibility(VT100);
-                   if (!cfg.no_remote_charset)
+                   if (!term->cfg.no_remote_charset)
                        term->cset_attr[0] = ATTR_LINEDRW;
                    break;
                  case ANSI('U', '('): 
                    compatibility(OTHER);
-                   if (!cfg.no_remote_charset)
+                   if (!term->cfg.no_remote_charset)
                        term->cset_attr[0] = ATTR_SCOACS; 
                    break;
 
                  case ANSI('A', ')'):
                    compatibility(VT100);
-                   if (!cfg.no_remote_charset)
+                   if (!term->cfg.no_remote_charset)
                        term->cset_attr[1] = ATTR_GBCHR;
                    break;
                  case ANSI('B', ')'):
                    compatibility(VT100);
-                   if (!cfg.no_remote_charset)
+                   if (!term->cfg.no_remote_charset)
                        term->cset_attr[1] = ATTR_ASCII;
                    break;
                  case ANSI('0', ')'):
                    compatibility(VT100);
-                   if (!cfg.no_remote_charset)
+                   if (!term->cfg.no_remote_charset)
                        term->cset_attr[1] = ATTR_LINEDRW;
                    break;
                  case ANSI('U', ')'): 
                    compatibility(OTHER);
-                   if (!cfg.no_remote_charset)
+                   if (!term->cfg.no_remote_charset)
                        term->cset_attr[1] = ATTR_SCOACS; 
                    break;
 
                  case ANSI('8', '%'):  /* Old Linux code */
                  case ANSI('G', '%'):
                    compatibility(OTHER);
-                   if (!cfg.no_remote_charset)
+                   if (!term->cfg.no_remote_charset)
                        term->utf = 1;
                    break;
                  case ANSI('@', '%'):
                    compatibility(OTHER);
-                   if (!cfg.no_remote_charset)
+                   if (!term->cfg.no_remote_charset)
                        term->utf = 0;
                    break;
                }
@@ -1783,7 +2126,8 @@ void term_out(Terminal *term)
                        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, 0);
+                       if (term->ldisc)
+                           ldisc_send(term->ldisc, "\033[>0;136;0c", 11, 0);
                        break;
                      case 'a':       /* move right N cols */
                        compatibility(ANSI);
@@ -1885,17 +2229,20 @@ void term_out(Terminal *term)
                      case 'c':       /* terminal type query */
                        compatibility(VT100);
                        /* This is the response for a VT102 */
-                       ldisc_send(term->id_string,
-                                  strlen(term->id_string), 0);
+                       if (term->ldisc)
+                           ldisc_send(term->ldisc, term->id_string,
+                                      strlen(term->id_string), 0);
                        break;
                      case 'n':       /* cursor position query */
-                       if (term->esc_args[0] == 6) {
-                           char buf[32];
-                           sprintf(buf, "\033[%d;%dR", term->curs.y + 1,
-                                   term->curs.x + 1);
-                           ldisc_send(buf, strlen(buf), 0);
-                       } else if (term->esc_args[0] == 5) {
-                           ldisc_send("\033[0n", 4, 0);
+                       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 */
@@ -1913,7 +2260,7 @@ void term_out(Terminal *term)
                        compatibility(VT100);
                        {
                            if (term->esc_nargs != 1) break;
-                           if (term->esc_args[0] == 5 && *cfg.printer) {
+                           if (term->esc_args[0] == 5 && *term->cfg.printer) {
                                term->printing = TRUE;
                                term->only_printing = !term->esc_query;
                                term->print_state = 0;
@@ -2035,15 +2382,15 @@ void term_out(Terminal *term)
                                    break;
                                  case 10:      /* SCO acs off */
                                    compatibility(SCOANSI);
-                                   if (cfg.no_remote_charset) break;
+                                   if (term->cfg.no_remote_charset) break;
                                    term->sco_acs = 0; break;
                                  case 11:      /* SCO acs on */
                                    compatibility(SCOANSI);
-                                   if (cfg.no_remote_charset) break;
+                                   if (term->cfg.no_remote_charset) break;
                                    term->sco_acs = 1; break;
-                                 case 12:      /* SCO acs on flipped */
+                                 case 12:      /* SCO acs on, |0x80 */
                                    compatibility(SCOANSI);
-                                   if (cfg.no_remote_charset) break;
+                                   if (term->cfg.no_remote_charset) break;
                                    term->sco_acs = 2; break;
                                  case 22:      /* disable bold */
                                    compatibility2(OTHER, VT220);
@@ -2074,6 +2421,20 @@ void term_out(Terminal *term)
                                    term->curr_attr |=
                                        (term->esc_args[i] - 30)<<ATTR_FGSHIFT;
                                    break;
+                                 case 90:
+                                 case 91:
+                                 case 92:
+                                 case 93:
+                                 case 94:
+                                 case 95:
+                                 case 96:
+                                 case 97:
+                                   /* xterm-style bright foreground */
+                                   term->curr_attr &= ~ATTR_FGMASK;
+                                   term->curr_attr |=
+                                       ((term->esc_args[i] - 90 + 16)
+                                         << ATTR_FGSHIFT);
+                                   break;
                                  case 39:      /* default-foreground */
                                    term->curr_attr &= ~ATTR_FGMASK;
                                    term->curr_attr |= ATTR_DEFFG;
@@ -2091,6 +2452,20 @@ void term_out(Terminal *term)
                                    term->curr_attr |=
                                        (term->esc_args[i] - 40)<<ATTR_BGSHIFT;
                                    break;
+                                 case 100:
+                                 case 101:
+                                 case 102:
+                                 case 103:
+                                 case 104:
+                                 case 105:
+                                 case 106:
+                                 case 107:
+                                   /* xterm-style bright background */
+                                   term->curr_attr &= ~ATTR_BGMASK;
+                                   term->curr_attr |=
+                                       ((term->esc_args[i] - 100 + 16)
+                                         << ATTR_BGSHIFT);
+                                   break;
                                  case 49:      /* default-background */
                                    term->curr_attr &= ~ATTR_BGMASK;
                                    term->curr_attr |= ATTR_DEFBG;
@@ -2122,8 +2497,8 @@ void term_out(Terminal *term)
                            && (term->esc_args[0] < 1 ||
                                term->esc_args[0] >= 24)) {
                            compatibility(VT340TEXT);
-                           if (!cfg.no_remote_resize)
-                               request_resize(term->cols,
+                           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 &&
@@ -2135,15 +2510,16 @@ void term_out(Terminal *term)
                                int x, y, len;
                                char buf[80], *p;
                              case 1:
-                               set_iconic(FALSE);
+                               set_iconic(term->frontend, FALSE);
                                break;
                              case 2:
-                               set_iconic(TRUE);
+                               set_iconic(term->frontend, TRUE);
                                break;
                              case 3:
                                if (term->esc_nargs >= 3) {
-                                   if (!cfg.no_remote_resize)
-                                       move_window(def(term->esc_args[1], 0),
+                                   if (!term->cfg.no_remote_resize)
+                                       move_window(term->frontend,
+                                                   def(term->esc_args[1], 0),
                                                    def(term->esc_args[2], 0));
                                }
                                break;
@@ -2154,44 +2530,56 @@ void term_out(Terminal *term)
                                 * manage it. */
                                break;
                              case 5:
-                               set_zorder(TRUE);   /* move to top */
+                               /* move to top */
+                               set_zorder(term->frontend, TRUE);
                                break;
                              case 6:
-                               set_zorder(FALSE);  /* move to bottom */
+                               /* move to bottom */
+                               set_zorder(term->frontend, FALSE);
                                break;
                              case 7:
-                               refresh_window();
+                               refresh_window(term->frontend);
                                break;
                              case 8:
                                if (term->esc_nargs >= 3) {
-                                   if (!cfg.no_remote_resize)
-                                       request_resize(def(term->esc_args[2], cfg.width),
-                                                      def(term->esc_args[1], cfg.height));
+                                   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->esc_args[1] ?
+                                   set_zoomed(term->frontend,
+                                              term->esc_args[1] ?
                                               TRUE : FALSE);
                                break;
                              case 11:
-                               ldisc_send(is_iconic() ? "\033[1t" : "\033[2t",
-                                          4, 0);
+                               if (term->ldisc)
+                                   ldisc_send(term->ldisc,
+                                              is_iconic(term->frontend) ?
+                                              "\033[1t" : "\033[2t", 4, 0);
                                break;
                              case 13:
-                               get_window_pos(&x, &y);
-                               len = sprintf(buf, "\033[3;%d;%dt", x, y);
-                               ldisc_send(buf, len, 0);
+                               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:
-                               get_window_pixels(&x, &y);
-                               len = sprintf(buf, "\033[4;%d;%dt", x, y);
-                               ldisc_send(buf, len, 0);
+                               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:
-                               len = sprintf(buf, "\033[8;%d;%dt",
-                                             term->rows, term->cols);
-                               ldisc_send(buf, len, 0);
+                               if (term->ldisc) {
+                                   len = sprintf(buf, "\033[8;%d;%dt",
+                                                 term->rows, term->cols);
+                                   ldisc_send(term->ldisc, buf, len, 0);
+                               }
                                break;
                              case 19:
                                /*
@@ -2211,18 +2599,22 @@ void term_out(Terminal *term)
                                 */
                                break;
                              case 20:
-                               p = get_window_title(TRUE);
-                               len = strlen(p);
-                               ldisc_send("\033]L", 3, 0);
-                               ldisc_send(p, len, 0);
-                               ldisc_send("\033\\", 2, 0);
+                               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:
-                               p = get_window_title(FALSE);
-                               len = strlen(p);
-                               ldisc_send("\033]l", 3, 0);
-                               ldisc_send(p, len, 0);
-                               ldisc_send("\033\\", 2, 0);
+                               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;
                            }
                        }
@@ -2251,10 +2643,10 @@ void term_out(Terminal *term)
                         */
                        compatibility(VT420);
                        if (term->esc_nargs == 1 && term->esc_args[0] > 0) {
-                           if (!cfg.no_remote_resize)
-                               request_resize(term->cols,
+                           if (!term->cfg.no_remote_resize)
+                               request_resize(term->frontend, term->cols,
                                               def(term->esc_args[0],
-                                                  cfg.height));
+                                                  term->cfg.height));
                            deselect(term);
                        }
                        break;
@@ -2265,9 +2657,10 @@ void term_out(Terminal *term)
                         */
                        compatibility(VT340TEXT);
                        if (term->esc_nargs <= 1) {
-                           if (!cfg.no_remote_resize)
-                               request_resize(def(term->esc_args[0],
-                                                  cfg.width), term->rows);
+                           if (!term->cfg.no_remote_resize)
+                               request_resize(term->frontend,
+                                              def(term->esc_args[0],
+                                                  term->cfg.width), term->rows);
                            deselect(term);
                        }
                        break;
@@ -2282,6 +2675,8 @@ void term_out(Terminal *term)
                                n = term->cols - term->curs.x;
                            cursplus = term->curs;
                            cursplus.x += n;
+                           check_boundary(term, term->curs.x, term->curs.y);
+                           check_boundary(term, term->curs.x+n, term->curs.y);
                            check_selection(term, term->curs, cursplus);
                            while (n--)
                                *p++ = term->erase_char;
@@ -2290,13 +2685,13 @@ void term_out(Terminal *term)
                        break;
                      case 'x':       /* report terminal characteristics */
                        compatibility(VT100);
-                       {
+                       if (term->ldisc) {
                            char buf[32];
                            int i = def(term->esc_args[0], 0);
                            if (i == 0 || i == 1) {
                                strcpy(buf, "\033[2;1;1;112;112;1;0x");
                                buf[2] += i;
-                               ldisc_send(buf, 20, 0);
+                               ldisc_send(term->ldisc, buf, 20, 0);
                            }
                        }
                        break;
@@ -2399,7 +2794,7 @@ void term_out(Terminal *term)
                         * Well we should do a soft reset at this point ...
                         */
                        if (!has_compat(VT420) && has_compat(VT100)) {
-                           if (!cfg.no_remote_resize) {
+                           if (!term->cfg.no_remote_resize) {
                                if (term->reset_132)
                                    request_resize(132, 24);
                                else
@@ -2418,7 +2813,7 @@ void term_out(Terminal *term)
                    term->osc_strlen = 0;
                    break;
                  case 'R':            /* Linux palette reset */
-                   palette_reset();
+                   palette_reset(term->frontend);
                    term_invalidate(term);
                    term->termstate = TOPLEVEL;
                    break;
@@ -2464,7 +2859,7 @@ void term_out(Terminal *term)
                 *
                 * -- RDB
                 */
-               if (c == '\n' || c == '\r') {
+               if (c == '\012' || c == '\015') {
                    term->termstate = TOPLEVEL;
                } else if (c == 0234 || c == '\007') {
                    /*
@@ -2497,7 +2892,7 @@ void term_out(Terminal *term)
                    }
                    term->osc_string[term->osc_strlen++] = val;
                    if (term->osc_strlen >= 7) {
-                       palette_set(term->osc_string[0],
+                       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]);
@@ -2620,7 +3015,8 @@ void term_out(Terminal *term)
                    term->termstate = VT52_Y1;
                    break;
                  case 'Z':
-                   ldisc_send("\033/Z", 3, 0);
+                   if (term->ldisc)
+                       ldisc_send(term->ldisc, "\033/Z", 3, 0);
                    break;
                  case '=':
                    term->app_keypad_keys = TRUE;
@@ -2634,7 +3030,7 @@ void term_out(Terminal *term)
                     *     emulation.
                     */
                    term->vt52_mode = FALSE;
-                   term->blink_is_real = cfg.blinktext;
+                   term->blink_is_real = term->cfg.blinktext;
                    break;
 #if 0
                  case '^':
@@ -2819,12 +3215,15 @@ static int linecmp(Terminal *term, unsigned long *a, unsigned long *b)
  */
 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;
     unsigned long ticks;
+#ifdef OPTIMISE_SCROLL
+    struct scrollregion *sr;
+#endif /* OPTIMISE_SCROLL */
 
     /*
      * Check the visual bell state.
@@ -2847,7 +3246,7 @@ static void do_paint(Terminal *term, Context ctx, int may_optimise)
     /* Has the cursor position or type changed ? */
     if (term->cursor_on) {
        if (term->has_focus) {
-           if (term->blinker || !cfg.blink_cur)
+           if (term->blinker || !term->cfg.blink_cur)
                cursor = TATTR_ACTCURS;
            else
                cursor = 0;
@@ -2858,13 +3257,27 @@ static void do_paint(Terminal *term, Context ctx, int may_optimise)
     } else
        cursor = 0;
     our_curs_y = term->curs.y - term->disptop;
+    {
+       /*
+        * Adjust the cursor position in the case where it's
+        * resting on the right-hand half of a CJK wide character.
+        * xterm's behaviour here, which seems adequate to me, is
+        * to display the cursor covering the _whole_ character,
+        * exactly as if it were one space to the left.
+        */
+       unsigned long *ldata = lineptr(term->curs.y);
+       our_curs_x = term->curs.x;
+       if (our_curs_x > 0 &&
+           (ldata[our_curs_x] & (CHAR_MASK | CSET_MASK)) == UCSWIDE)
+           our_curs_x--;
+    }
 
     if (term->dispcurs && (term->curstype != cursor ||
                           term->dispcurs !=
                           term->disptext + our_curs_y * (term->cols + 1) +
-                          term->curs.x)) {
+                          our_curs_x)) {
        if (term->dispcurs > term->disptext && 
-               (*term->dispcurs & (CHAR_MASK | CSET_MASK)) == UCSWIDE)
+           (*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;
@@ -2873,6 +3286,18 @@ static void do_paint(Terminal *term, Context ctx, int may_optimise)
     }
     term->dispcurs = NULL;
 
+#ifdef OPTIMISE_SCROLL
+    /* Do scrolls */
+    sr = term->scrollhead;
+    while (sr) {
+       struct scrollregion *next = sr->next;
+       do_scroll(ctx, sr->topline, sr->botline, sr->lines);
+       sfree(sr);
+       sr = next;
+    }
+    term->scrollhead = term->scrolltail = NULL;
+#endif /* OPTIMISE_SCROLL */
+
     /* The normal screen data */
     for (i = 0; i < term->rows; i++) {
        unsigned long *ldata;
@@ -2903,13 +3328,13 @@ static void do_paint(Terminal *term, 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);
@@ -2933,9 +3358,7 @@ static void do_paint(Terminal *term, Context ctx, int may_optimise)
            /* 'Real' blinking ? */
            if (term->blink_is_real && (tattr & ATTR_BLINK)) {
                if (term->has_focus && term->tblinker) {
-                   tchar = ' ';
-                   tattr &= ~CSET_MASK;
-                   tattr |= ATTR_ACP;
+                   tchar = term->ucsdata->unitab_line[(unsigned char)' '];
                }
                tattr &= ~ATTR_BLINK;
            }
@@ -2946,13 +3369,13 @@ static void do_paint(Terminal *term, Context ctx, int may_optimise)
             */
            if ((tchar | tattr) != (term->disptext[idx]& ~ATTR_NARROW)) {
                if ((tattr & ATTR_WIDE) == 0 && 
-                   CharWidth(ctx, (tchar | tattr) & 0xFFFF) == 2)
+                   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 == term->curs.x) {
+           if (i == our_curs_y && j == our_curs_x) {
                cursor_background = tattr | tchar;
                term->dispcurs = term->disptext + idx;
            }
@@ -2960,13 +3383,14 @@ static void do_paint(Terminal *term, Context ctx, int may_optimise)
            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 (!term->ucsdata->dbcs_screenfont && !dirty_line) {
                if ((tchar | tattr) == term->disptext[idx])
                    break_run = TRUE;
                else if (!dirty_run && ccount == 1)
@@ -2981,7 +3405,7 @@ static void do_paint(Terminal *term, 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;
            }
@@ -2996,11 +3420,12 @@ static void do_paint(Terminal *term, Context ctx, int may_optimise)
                if (++j < term->cols) {
                    idx++;
                    d++;
-                   /* Cursor is here ? Ouch! */
-                   if (i == our_curs_y && j == term->curs.x) {
-                       cursor_background = *d;
-                       term->dispcurs = term->disptext + idx;
-                   }
+                   /*
+                    * By construction above, the cursor should not
+                    * be on the right-hand half of this character.
+                    * Ever.
+                    */
+                   assert(!(i == our_curs_y && j == our_curs_x));
                    if (term->disptext[idx] != *d)
                        dirty_run = TRUE;
                    term->disptext[idx] = *d;
@@ -3016,7 +3441,7 @@ static void do_paint(Terminal *term, Context ctx, int may_optimise)
        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, term->curs.x, i, ch, 1, attr, lattr);
+           do_cursor(ctx, our_curs_x, i, ch, 1, attr, lattr);
            term->curstype = cursor;
        }
     }
@@ -3070,7 +3495,7 @@ void term_invalidate(Terminal *term)
  * Paint the window in response to a WM_PAINT message.
  */
 void term_paint(Terminal *term, Context ctx,
-               int left, int top, int right, int bottom)
+               int left, int top, int right, int bottom, int immediately)
 {
     int i, j;
     if (left < 0) left = 0;
@@ -3092,7 +3517,7 @@ void term_paint(Terminal *term, Context ctx,
      * fails to actually do anything when re-sizing ... painting the wrong
      * window perhaps ?
      */
-    if (alt_pressed)
+    if (immediately)
         do_paint (term, ctx, FALSE);
 }
 
@@ -3105,7 +3530,11 @@ void term_paint(Terminal *term, Context ctx,
  */
 void term_scroll(Terminal *term, int rel, int where)
 {
-    int sbtop = -count234(term->scrollback);
+    int sbtop = -sblines(term);
+#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)
@@ -3113,6 +3542,11 @@ void term_scroll(Terminal *term, int rel, int where)
     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);
 }
 
@@ -3156,6 +3590,9 @@ static void clipme(Terminal *term, pos top, pos bottom, int rect)
                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);
        }
 
        /*
@@ -3187,23 +3624,23 @@ static void clipme(Terminal *term, pos top, pos bottom, int rect)
 
            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;
            }
 
@@ -3214,17 +3651,17 @@ static void clipme(Terminal *term, pos top, pos bottom, int rect)
 
            if (DIRECT_FONT(uc)) {
                if (c >= ' ' && c != 0x7F) {
-                   unsigned char buf[4];
+                   char buf[4];
                    WCHAR wbuf[4];
                    int rv;
-                   if (is_dbcs_leadbyte(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 = mb_to_wc(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 = mb_to_wc(font_codepage, 0, buf, 1, wbuf, 4);
+                       rv = mb_to_wc(term->ucsdata->font_codepage, 0, buf, 1, wbuf, 4);
                    }
 
                    if (rv > 0) {
@@ -3262,7 +3699,7 @@ static void clipme(Terminal *term, pos top, pos bottom, int rect)
     wblen++;
     *wbptr++ = 0;
 #endif
-    write_clip(workbuf, wblen, FALSE); /* transfer to clipboard */
+    write_clip(term->frontend, workbuf, wblen, FALSE); /* transfer to clipbd */
     if (buflen > 0)                   /* indicates we allocated this buffer */
        sfree(workbuf);
 }
@@ -3270,7 +3707,7 @@ static void clipme(Terminal *term, pos top, pos bottom, int rect)
 void term_copyall(Terminal *term)
 {
     pos top;
-    top.y = -count234(term->scrollback);
+    top.y = -sblines(term);
     top.x = 0;
     clipme(term, top, term->curs, 0);
 }
@@ -3281,9 +3718,10 @@ void term_copyall(Terminal *term)
  */
 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}, {
@@ -3347,33 +3785,35 @@ static int wordtype(Terminal *term, 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 (dbcs_screenfont && font_codepage == line_codepage)
+    if (term->ucsdata->dbcs_screenfont &&
+       term->ucsdata->font_codepage == term->ucsdata->line_codepage)
        return (uc != ' ');
 
     if (uc < 0x80)
@@ -3394,7 +3834,7 @@ static pos sel_spread_half(Terminal *term, pos p, int dir)
 {
     unsigned long *ldata;
     short wvalue;
-    int topy = -count234(term->scrollback);
+    int topy = -sblines(term);
 
     ldata = lineptr(p.y);
 
@@ -3419,11 +3859,13 @@ static pos sel_spread_half(Terminal *term, pos p, int dir)
         * In this mode, the units are maximal runs of characters
         * whose `wordness' has the same value.
         */
-       wvalue = wordtype(term, ldata[p.x]);
+       wvalue = wordtype(term, UCSGET(ldata, p.x));
        if (dir == +1) {
            while (1) {
-               if (p.x < term->cols-1) {
-                   if (wordtype(term, ldata[p.x + 1]) == wvalue)
+               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;
@@ -3431,7 +3873,7 @@ static pos sel_spread_half(Terminal *term, pos p, int dir)
                    if (ldata[term->cols] & LATTR_WRAPPED) {
                        unsigned long *ldata2;
                        ldata2 = lineptr(p.y+1);
-                       if (wordtype(term, ldata2[0]) == wvalue) {
+                       if (wordtype(term, UCSGET(ldata2, 0)) == wvalue) {
                            p.x = 0;
                            p.y++;
                            ldata = ldata2;
@@ -3444,20 +3886,26 @@ static pos sel_spread_half(Terminal *term, pos p, int dir)
        } else {
            while (1) {
                if (p.x > 0) {
-                   if (wordtype(term, ldata[p.x - 1]) == wvalue)
+                   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);
-                   if ((ldata2[term->cols] & LATTR_WRAPPED) &&
-                       wordtype(term, ldata2[term->cols-1]) == wvalue) {
-                       p.x = term->cols-1;
-                       p.y--;
-                       ldata = ldata2;
+                   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;
                }
@@ -3489,7 +3937,7 @@ void term_do_paste(Terminal *term)
     wchar_t *data;
     int len;
 
-    get_clip(&data, &len);
+    get_clip(term->frontend, &data, &len);
     if (data && len > 0) {
         wchar_t *p, *q;
 
@@ -3516,7 +3964,7 @@ void term_do_paste(Terminal *term)
 
             if (p <= data + len - sel_nl_sz &&
                 !memcmp(p, sel_nl, sizeof(sel_nl))) {
-                term->paste_buffer[term->paste_len++] = '\r';
+                term->paste_buffer[term->paste_len++] = '\015';
                 p += sel_nl_sz;
             }
             q = p;
@@ -3524,24 +3972,25 @@ void term_do_paste(Terminal *term)
 
         /* Assume a small paste will be OK in one go. */
         if (term->paste_len < 256) {
-            luni_send(term->paste_buffer, term->paste_len, 0);
+            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(Terminal *term, Mouse_Button b, Mouse_Action a, int x, int y,
-               int shift, int ctrl, int alt)
+void term_mouse(Terminal *term, Mouse_Button braw, Mouse_Button bcooked,
+               Mouse_Action a, int x, int y, int shift, int ctrl, int alt)
 {
     pos selpoint;
     unsigned long *ldata;
     int raw_mouse = (term->xterm_mouse &&
-                    !cfg.no_mouse_rep &&
-                    !(cfg.mouse_override && shift));
+                    !term->cfg.no_mouse_rep &&
+                    !(term->cfg.mouse_override && shift));
     int default_seltype;
 
     if (y < 0) {
@@ -3573,62 +4022,62 @@ void term_mouse(Terminal *term, Mouse_Button b, Mouse_Action a, int x, int y,
     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 (term->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 (braw) {
+             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 == braw)
+                   return;
+               term->mouse_is_down = braw;
+               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, 0);
        return;
     }
 
-    b = translate_button(b);
-
     /*
      * Set the selection type (rectangular or normal) at the start
      * of a selection attempt, from the state of Alt.
      */
-    if (!alt ^ !cfg.rect_select)
+    if (!alt ^ !term->cfg.rect_select)
        default_seltype = RECTANGULAR;
     else
        default_seltype = LEXICOGRAPHIC;
@@ -3637,13 +4086,13 @@ void term_mouse(Terminal *term, Mouse_Button b, Mouse_Action a, int x, int y,
        term->seltype = default_seltype;
     }
 
-    if (b == MBT_SELECT && a == MA_CLICK) {
+    if (bcooked == MBT_SELECT && a == MA_CLICK) {
        deselect(term);
        term->selstate = ABOUT_TO;
        term->seltype = default_seltype;
        term->selanchor = selpoint;
        term->selmode = SM_CHAR;
-    } else if (b == MBT_SELECT && (a == MA_2CLK || a == MA_3CLK)) {
+    } else if (bcooked == MBT_SELECT && (a == MA_2CLK || a == MA_3CLK)) {
        deselect(term);
        term->selmode = (a == MA_2CLK ? SM_WORD : SM_LINE);
        term->selstate = DRAGGING;
@@ -3651,11 +4100,12 @@ void term_mouse(Terminal *term, Mouse_Button b, Mouse_Action a, int x, int y,
        term->selend = term->selstart;
        incpos(term->selend);
        sel_spread(term);
-    } else if ((b == MBT_SELECT && a == MA_DRAG) ||
-              (b == MBT_EXTEND && a != MA_RELEASE)) {
+    } else if ((bcooked == MBT_SELECT && a == MA_DRAG) ||
+              (bcooked == MBT_EXTEND && a != MA_RELEASE)) {
        if (term->selstate == ABOUT_TO && poseq(term->selanchor, selpoint))
            return;
-       if (b == MBT_EXTEND && a != MA_DRAG && term->selstate == SELECTED) {
+       if (bcooked == MBT_EXTEND && a != MA_DRAG &&
+           term->selstate == SELECTED) {
            if (term->seltype == LEXICOGRAPHIC) {
                /*
                 * For normal selection, we extend by moving
@@ -3716,7 +4166,8 @@ void term_mouse(Terminal *term, Mouse_Button b, Mouse_Action a, int x, int y,
            term->selend.y =   max(term->selanchor.y, selpoint.y);
        }
        sel_spread(term);
-    } else if ((b == MBT_SELECT || b == MBT_EXTEND) && a == MA_RELEASE) {
+    } else if ((bcooked == MBT_SELECT || bcooked == MBT_EXTEND) &&
+              a == MA_RELEASE) {
        if (term->selstate == DRAGGING) {
            /*
             * We've completed a selection. We now transfer the
@@ -3727,18 +4178,458 @@ void term_mouse(Terminal *term, Mouse_Button b, Mouse_Action a, int x, int y,
            term->selstate = SELECTED;
        } else
            term->selstate = NO_SELECTION;
-    } else if (b == MBT_PASTE
+    } else if (bcooked == MBT_PASTE
               && (a == MA_CLICK
 #if MULTICLICK_ONLY_EVENT
                   || a == MA_2CLK || a == MA_3CLK
 #endif
                   )) {
-       request_paste();
+       request_paste(term->frontend);
     }
 
     term_update(term);
 }
 
+void term_key(Terminal *term, Key_Sym keysym, wchar_t *text, size_t tlen,
+             unsigned int modifiers, unsigned int flags)
+{
+    char output[10];
+    char *p = output;
+    int prependesc = FALSE;
+#if 0
+    int i;
+
+    fprintf(stderr, "keysym = %d, %d chars:", keysym, tlen);
+    for (i = 0; i < tlen; i++)
+       fprintf(stderr, " %04x", (unsigned)text[i]);
+    fprintf(stderr, "\n");
+#endif
+
+    /* XXX Num Lock */
+    if ((flags & PKF_REPEAT) && term->repeat_off)
+       return;
+
+    /* Currently, Meta always just prefixes everything with ESC. */
+    if (modifiers & PKM_META)
+       prependesc = TRUE;
+    modifiers &= ~PKM_META;
+
+    /*
+     * Alt is only used for Alt+keypad, which isn't supported yet, so
+     * ignore it.
+     */
+    modifiers &= ~PKM_ALT;
+
+    /* Standard local function keys */
+    switch (modifiers & (PKM_SHIFT | PKM_CONTROL)) {
+      case PKM_SHIFT:
+       if (keysym == PK_PAGEUP)
+           /* scroll up one page */;
+       if (keysym == PK_PAGEDOWN)
+           /* scroll down on page */;
+       if (keysym == PK_INSERT)
+           term_do_paste(term);
+       break;
+      case PKM_CONTROL:
+       if (keysym == PK_PAGEUP)
+           /* scroll up one line */;
+       if (keysym == PK_PAGEDOWN)
+           /* scroll down one line */;
+       /* Control-Numlock for app-keypad mode switch */
+       if (keysym == PK_PF1)
+           term->app_keypad_keys ^= 1;
+       break;
+    }
+
+    if (modifiers & PKM_ALT) {
+       /* Alt+F4 (close) */
+       /* Alt+Return (full screen) */
+       /* Alt+Space (system menu) */
+    }
+
+    if (keysym == PK_NULL && (modifiers & PKM_CONTROL) && tlen == 1 &&
+       text[0] >= 0x20 && text[0] <= 0x7e) {
+       /* ASCII chars + Control */
+       if ((text[0] >= 0x40 && text[0] <= 0x5f) ||
+           (text[0] >= 0x61 && text[0] <= 0x7a))
+           text[0] &= 0x1f;
+       else {
+           /*
+            * Control-2 should return ^@ (0x00), Control-6 should return
+            * ^^ (0x1E), and Control-Minus should return ^_ (0x1F). Since
+            * the DOS keyboard handling did it, and we have nothing better
+            * to do with the key combo in question, we'll also map
+            * Control-Backquote to ^\ (0x1C).
+            */
+           switch (text[0]) {
+             case ' ': text[0] = 0x00; break;
+             case '-': text[0] = 0x1f; break;
+             case '/': text[0] = 0x1f; break;
+             case '2': text[0] = 0x00; break;
+             case '3': text[0] = 0x1b; break;
+             case '4': text[0] = 0x1c; break;
+             case '5': text[0] = 0x1d; break;
+             case '6': text[0] = 0x1e; break;
+             case '7': text[0] = 0x1f; break;
+             case '8': text[0] = 0x7f; break;
+             case '`': text[0] = 0x1c; break;
+           }
+       }
+    }
+
+    /* Nethack keypad */
+    if (term->cfg.nethack_keypad) {
+       char c = 0;
+       switch (keysym) {
+         case PK_KP1: c = 'b'; break;
+         case PK_KP2: c = 'j'; break;
+         case PK_KP3: c = 'n'; break;
+         case PK_KP4: c = 'h'; break;
+         case PK_KP5: c = '.'; break;
+         case PK_KP6: c = 'l'; break;
+         case PK_KP7: c = 'y'; break;
+         case PK_KP8: c = 'k'; break;
+         case PK_KP9: c = 'u'; break;
+         default: break; /* else gcc warns `enum value not used' */
+       }
+       if (c != 0) {
+           if (c != '.') {
+               if (modifiers & PKM_CONTROL)
+                   c &= 0x1f;
+               else if (modifiers & PKM_SHIFT)
+                   c = toupper(c);
+           }
+           *p++ = c;
+           goto done;
+       }
+    }
+
+    /* Numeric Keypad */
+    if (PK_ISKEYPAD(keysym)) {
+       int xkey = 0;
+
+       /*
+        * In VT400 mode, PFn always emits an escape sequence.  In
+        * Linux and tilde modes, this only happens in app keypad mode.
+        */
+       if (term->cfg.funky_type == FUNKY_VT400 ||
+           ((term->cfg.funky_type == FUNKY_LINUX ||
+             term->cfg.funky_type == FUNKY_TILDE) &&
+            term->app_keypad_keys && !term->cfg.no_applic_k)) {
+           switch (keysym) {
+             case PK_PF1: xkey = 'P'; break;
+             case PK_PF2: xkey = 'Q'; break;
+             case PK_PF3: xkey = 'R'; break;
+             case PK_PF4: xkey = 'S'; break;
+             default: break; /* else gcc warns `enum value not used' */
+           }
+       }
+       if (term->app_keypad_keys && !term->cfg.no_applic_k) {
+           switch (keysym) {
+             case PK_KP0: xkey = 'p'; break;
+             case PK_KP1: xkey = 'q'; break;
+             case PK_KP2: xkey = 'r'; break;
+             case PK_KP3: xkey = 's'; break;
+             case PK_KP4: xkey = 't'; break;
+             case PK_KP5: xkey = 'u'; break;
+             case PK_KP6: xkey = 'v'; break;
+             case PK_KP7: xkey = 'w'; break;
+             case PK_KP8: xkey = 'x'; break;
+             case PK_KP9: xkey = 'y'; break;
+             case PK_KPDECIMAL: xkey = 'n'; break;
+             case PK_KPENTER: xkey = 'M'; break;
+             default: break; /* else gcc warns `enum value not used' */
+           }
+           if (term->cfg.funky_type == FUNKY_XTERM && tlen > 0) {
+               /*
+                * xterm can't see the layout of the keypad, so it has
+                * to rely on the X keysyms returned by the keys.
+                * Hence, we look at the strings here, not the PuTTY
+                * keysyms (which describe the layout).
+                */
+               switch (text[0]) {
+                 case '+':
+                   if (modifiers & PKM_SHIFT)
+                       xkey = 'l';
+                   else
+                       xkey = 'k';
+                   break;
+                 case '/': xkey = 'o'; break;
+                 case '*': xkey = 'j'; break;
+                 case '-': xkey = 'm'; break;
+               }
+           } else {
+               /*
+                * In all other modes, we try to retain the layout of
+                * the DEC keypad in application mode.
+                */
+               switch (keysym) {
+                 case PK_KPBIGPLUS:
+                   /* This key covers the '-' and ',' keys on a VT220 */
+                   if (modifiers & PKM_SHIFT)
+                       xkey = 'm'; /* VT220 '-' */
+                   else
+                       xkey = 'l'; /* VT220 ',' */
+                   break;
+                 case PK_KPMINUS: xkey = 'm'; break;
+                 case PK_KPCOMMA: xkey = 'l'; break;
+                 default: break; /* else gcc warns `enum value not used' */
+               }
+           }
+       }
+       if (xkey) {
+           if (term->vt52_mode) {
+               if (xkey >= 'P' && xkey <= 'S')
+                   p += sprintf((char *) p, "\x1B%c", xkey);
+               else
+                   p += sprintf((char *) p, "\x1B?%c", xkey);
+           } else
+               p += sprintf((char *) p, "\x1BO%c", xkey);
+           goto done;
+       }
+       /* Not in application mode -- treat the number pad as arrow keys? */
+       if ((flags & PKF_NUMLOCK) == 0) {
+           switch (keysym) {
+             case PK_KP0: keysym = PK_INSERT; break;
+             case PK_KP1: keysym = PK_END; break;
+             case PK_KP2: keysym = PK_DOWN; break;
+             case PK_KP3: keysym = PK_PAGEDOWN; break;
+             case PK_KP4: keysym = PK_LEFT; break;
+             case PK_KP5: keysym = PK_REST; break;
+             case PK_KP6: keysym = PK_RIGHT; break;
+             case PK_KP7: keysym = PK_HOME; break;
+             case PK_KP8: keysym = PK_UP; break;
+             case PK_KP9: keysym = PK_PAGEUP; break;
+             default: break; /* else gcc warns `enum value not used' */
+           }
+       }
+    }
+
+    /* Miscellaneous keys */
+    switch (keysym) {
+      case PK_ESCAPE:
+       *p++ = 0x1b;
+       goto done;
+      case PK_BACKSPACE:
+           if (modifiers == 0)
+               *p++ = (term->cfg.bksp_is_delete ? 0x7F : 0x08);
+           else if (modifiers == PKM_SHIFT)
+               /* We do the opposite of what is configured */
+               *p++ = (term->cfg.bksp_is_delete ? 0x08 : 0x7F);
+           else break;
+           goto done;
+      case PK_TAB:
+       if (modifiers == 0)
+           *p++ = 0x09;
+       else if (modifiers == PKM_SHIFT)
+           *p++ = 0x1B, *p++ = '[', *p++ = 'Z';
+       else break;
+       goto done;
+       /* XXX window.c has ctrl+shift+space sending 0xa0 */
+      case PK_PAUSE:
+       if (modifiers == PKM_CONTROL)
+           *p++ = 26;
+       else break;
+       goto done;
+      case PK_RETURN:
+      case PK_KPENTER: /* Odd keypad modes handled above */
+       if (modifiers == 0) {
+           *p++ = 0x0d;
+           if (term->cr_lf_return)
+               *p++ = 0x0a;
+           goto done;
+       }
+      default: break; /* else gcc warns `enum value not used' */
+    }
+
+    /* SCO function keys and editing keys */
+    if (term->cfg.funky_type == FUNKY_SCO) {
+       if (PK_ISFKEY(keysym) && keysym <= PK_F12) {
+           static char const codes[] =
+               "MNOPQRSTUVWX" "YZabcdefghij" "klmnopqrstuv" "wxyz@[\\]^_`{";
+           int index = keysym - PK_F1;
+
+           if (modifiers & PKM_SHIFT) index += 12;
+           if (modifiers & PKM_CONTROL) index += 24;
+           p += sprintf((char *) p, "\x1B[%c", codes[index]);
+           goto done;
+       }
+       if (PK_ISEDITING(keysym)) {
+           int xkey = 0;
+
+           switch (keysym) {
+             case PK_DELETE:   *p++ = 0x7f; goto done;
+             case PK_HOME:     xkey = 'H'; break;
+             case PK_INSERT:   xkey = 'L'; break;
+             case PK_END:      xkey = 'F'; break;
+             case PK_PAGEUP:   xkey = 'I'; break;
+             case PK_PAGEDOWN: xkey = 'G'; break;
+             default: break; /* else gcc warns `enum value not used' */
+           }
+           p += sprintf((char *) p, "\x1B[%c", xkey);
+       }
+    }
+
+    if (PK_ISEDITING(keysym) && (modifiers & PKM_SHIFT) == 0) {
+       int code;
+
+       if (term->cfg.funky_type == FUNKY_XTERM) {
+           /* Xterm shuffles these keys, apparently. */
+           switch (keysym) {
+             case PK_HOME:     keysym = PK_INSERT;   break;
+             case PK_INSERT:   keysym = PK_HOME;     break;
+             case PK_DELETE:   keysym = PK_END;      break;
+             case PK_END:      keysym = PK_PAGEUP;   break;
+             case PK_PAGEUP:   keysym = PK_DELETE;   break;
+             case PK_PAGEDOWN: keysym = PK_PAGEDOWN; break;
+             default: break; /* else gcc warns `enum value not used' */
+           }
+       }
+
+       /* RXVT Home/End */
+       if (term->cfg.rxvt_homeend &&
+           (keysym == PK_HOME || keysym == PK_END)) {
+           p += sprintf((char *) p, keysym == PK_HOME ? "\x1B[H" : "\x1BOw");
+           goto done;
+       }
+
+       if (term->vt52_mode) {
+           int xkey;
+
+           /*
+            * A real VT52 doesn't have these, and a VT220 doesn't
+            * send anything for them in VT52 mode.
+            */
+           switch (keysym) {
+             case PK_HOME:     xkey = 'H'; break;
+             case PK_INSERT:   xkey = 'L'; break;
+             case PK_DELETE:   xkey = 'M'; break;
+             case PK_END:      xkey = 'E'; break;
+             case PK_PAGEUP:   xkey = 'I'; break;
+             case PK_PAGEDOWN: xkey = 'G'; break;
+             default: break; /* else gcc warns `enum value not used' */
+           }
+           p += sprintf((char *) p, "\x1B%c", xkey);
+           goto done;
+       }
+
+       switch (keysym) {
+         case PK_HOME:     code = 1; break;
+         case PK_INSERT:   code = 2; break;
+         case PK_DELETE:   code = 3; break;
+         case PK_END:      code = 4; break;
+         case PK_PAGEUP:   code = 5; break;
+         case PK_PAGEDOWN: code = 6; break;
+         default: break; /* else gcc warns `enum value not used' */
+       }
+       p += sprintf((char *) p, "\x1B[%d~", code);
+       goto done;
+    }
+
+    if (PK_ISFKEY(keysym)) {
+       /* Map Shift+F1-F10 to F11-F20 */
+       if (keysym >= PK_F1 && keysym <= PK_F10 && (modifiers & PKM_SHIFT))
+           keysym += 10;
+       if ((term->vt52_mode || term->cfg.funky_type == FUNKY_VT100P) &&
+           keysym <= PK_F14) {
+           /* XXX This overrides the XTERM/VT52 mode below */
+           int offt = 0;
+           if (keysym >= PK_F6)  offt++;
+           if (keysym >= PK_F12) offt++;
+           p += sprintf((char *) p, term->vt52_mode ? "\x1B%c" : "\x1BO%c",
+                        'P' + keysym - PK_F1 - offt);
+           goto done;
+       }
+       if (term->cfg.funky_type == FUNKY_LINUX && keysym <= PK_F5) {
+           p += sprintf((char *) p, "\x1B[[%c", 'A' + keysym - PK_F1);
+           goto done;
+       }
+       if (term->cfg.funky_type == FUNKY_XTERM && keysym <= PK_F4) {
+           if (term->vt52_mode)
+               p += sprintf((char *) p, "\x1B%c", 'P' + keysym - PK_F1);
+           else
+               p += sprintf((char *) p, "\x1BO%c", 'P' + keysym - PK_F1);
+           goto done;
+       }
+       p += sprintf((char *) p, "\x1B[%d~", 11 + keysym - PK_F1);
+       goto done;
+    }
+
+    if (PK_ISCURSOR(keysym)) {
+       int xkey;
+
+       switch (keysym) {
+         case PK_UP:    xkey = 'A'; break;
+         case PK_DOWN:  xkey = 'B'; break;
+         case PK_RIGHT: xkey = 'C'; break;
+         case PK_LEFT:  xkey = 'D'; break;
+         case PK_REST:  xkey = 'G'; break; /* centre key on number pad */
+         default: break; /* else gcc warns `enum value not used' */
+       }
+       if (term->vt52_mode)
+           p += sprintf((char *) p, "\x1B%c", xkey);
+       else {
+           int app_flg = (term->app_cursor_keys && !term->cfg.no_applic_c);
+
+           /* Useful mapping of Ctrl-arrows */
+           if (modifiers == PKM_CONTROL)
+               app_flg = !app_flg;
+
+           if (app_flg)
+               p += sprintf((char *) p, "\x1BO%c", xkey);
+           else
+               p += sprintf((char *) p, "\x1B[%c", xkey);
+       }
+       goto done;
+    }
+
+  done:
+    if (p > output || tlen > 0) {
+       /*
+        * Interrupt an ongoing paste. I'm not sure
+        * this is sensible, but for the moment it's
+        * preferable to having to faff about buffering
+        * things.
+        */
+       term_nopaste(term);
+
+       /*
+        * We need not bother about stdin backlogs
+        * here, because in GUI PuTTY we can't do
+        * anything about it anyway; there's no means
+        * of asking Windows to hold off on KEYDOWN
+        * messages. We _have_ to buffer everything
+        * we're sent.
+        */
+       term_seen_key_event(term);
+
+       if (prependesc) {
+#if 0
+           fprintf(stderr, "sending ESC\n");
+#endif
+           ldisc_send(term->ldisc, "\x1b", 1, 1);
+       }
+
+       if (p > output) {
+#if 0
+           fprintf(stderr, "sending %d bytes:", p - output);
+           for (i = 0; i < p - output; i++)
+               fprintf(stderr, " %02x", output[i]);
+           fprintf(stderr, "\n");
+#endif
+           ldisc_send(term->ldisc, output, p - output, 1);
+       } else if (tlen > 0) {
+#if 0
+           fprintf(stderr, "sending %d unichars:", tlen);
+           for (i = 0; i < tlen; i++)
+               fprintf(stderr, " %04x", (unsigned) text[i]);
+           fprintf(stderr, "\n");
+#endif
+           luni_send(term->ldisc, text, tlen, 1);
+       }
+    }
+}
+
 void term_nopaste(Terminal *term)
 {
     if (term->paste_len == 0)
@@ -3772,10 +4663,11 @@ void term_paste(Terminal *term)
     while (term->paste_pos < term->paste_len) {
        int n = 0;
        while (n + term->paste_pos < term->paste_len) {
-           if (term->paste_buffer[term->paste_pos + n++] == '\r')
+           if (term->paste_buffer[term->paste_pos + n++] == '\015')
                break;
        }
-       luni_send(term->paste_buffer + term->paste_pos, n, 0);
+       if (term->ldisc)
+           luni_send(term->ldisc, term->paste_buffer + term->paste_pos, n, 0);
        term->paste_pos += n;
 
        if (term->paste_pos < term->paste_len) {
@@ -3812,7 +4704,7 @@ int term_ldisc(Terminal *term, int option)
 /*
  * from_backend(), to get data from the backend for the terminal.
  */
-int from_backend(void *vterm, int is_stderr, char *data, int len)
+int from_backend(void *vterm, int is_stderr, const char *data, int len)
 {
     Terminal *term = (Terminal *)vterm;
 
@@ -3841,3 +4733,8 @@ int from_backend(void *vterm, int is_stderr, char *data, int len)
      */
     return 0;
 }
+
+void term_provide_logctx(Terminal *term, void *logctx)
+{
+    term->logctx = logctx;
+}