Bring in some of my scroll-optimisation stuff from the old Mac port.

[u/mdw/putty] / terminal.c

diff --git a/terminal.c b/terminal.c
index d57218a..410d8bb 100644 (file)
--- a/terminal.c
+++ b/terminal.c
@@ -68,6 +68,9 @@ 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.
@@ -703,6 +706,32 @@ static void scroll(Terminal *term, int topline, int botline, int lines, int sb)
     }
 }
 
+#ifdef OPTIMISE_SCROLL
+/*
+ * Scroll the physical display, and our conception of it in disptext.
+ */
+static void scroll_display(Terminal *term, int topline, int botline, int lines)
+{
+    unsigned long *start, *end;
+    int distance, size, i;
+
+    start = term->disptext + topline * (term->cols + 1);
+    end = term->disptext + (botline + 1) * (term->cols + 1);
+    distance = (lines > 0 ? lines : -lines) * (term->cols + 1);
+    size = end - start - distance;
+    if (lines > 0) {
+       memmove(start, start + distance, size * TSIZE);
+       for (i = 0; i < distance; i++)
+           (start + size)[i] |= ATTR_INVALID;
+    } else {
+       memmove(start + distance, start, size * TSIZE);
+       for (i = 0; i < distance; i++)
+           start[i] |= ATTR_INVALID;
+    }
+    do_scroll(term->frontend, topline, botline, lines);
+}
+#endif /* OPTIMISE_SCROLL */
+
 /*
  * Move the cursor to a given position, clipping at boundaries. We
  * may or may not want to clip at the scroll margin: marg_clip is 0
@@ -1227,7 +1256,7 @@ 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;
               c |= ATTR_SCOACS;
@@ -1413,7 +1442,7 @@ void term_out(Terminal *term)
                    term->esc_query = FALSE;
                }
                break;
-             case '\r':
+             case '\015':
                term->curs.x = 0;
                term->wrapnext = FALSE;
                fix_cpos;
@@ -1433,7 +1462,7 @@ 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)
@@ -2500,7 +2529,7 @@ 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') {
                    /*
@@ -3143,6 +3172,10 @@ void term_paint(Terminal *term, Context ctx,
 void term_scroll(Terminal *term, int rel, int where)
 {
     int sbtop = -count234(term->scrollback);
+#ifdef OPTIMISE_SCROLL
+    int olddisptop = term->disptop;
+    int shift;
+#endif /* OPTIMISE_SCROLL */
 
     term->disptop = (rel < 0 ? 0 : rel > 0 ? sbtop : term->disptop) + where;
     if (term->disptop < sbtop)
@@ -3150,6 +3183,11 @@ 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);
 }
 
@@ -3555,7 +3593,7 @@ 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;
@@ -3814,7 +3852,7 @@ 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;
        }
        if (term->ldisc)