1 files changed, 30 insertions, 22 deletions

diff --git a/src/scroll.c b/src/scroll.c
index 48a40fe23d2..5a59c69003e 100644
--- a/src/scroll.c
+++ b/src/scroll.c
@@ -23,12 +23,13 @@ Boston, MA 02110-1301, USA.  */
 #include <config.h>
 #include <stdio.h>
 #include <string.h>
-#include "termchar.h"
 #include "lisp.h"
+#include "termchar.h"
 #include "dispextern.h"
 #include "keyboard.h"
 #include "frame.h"
 #include "window.h"
+#include "termhooks.h"
 
 /* All costs measured in characters.
    So no cost can exceed the area of a frame, measured in characters.
@@ -58,10 +59,12 @@ struct matrix_elt
     unsigned char writecount;
   };
 
-static void do_direct_scrolling P_ ((struct glyph_matrix *,
+static void do_direct_scrolling P_ ((struct frame *,
+                                     struct glyph_matrix *,
                                      struct matrix_elt *,
                                      int, int));
-static void do_scrolling P_ ((struct glyph_matrix *,
+static void do_scrolling P_ ((struct frame *,
+                              struct glyph_matrix *,
                               struct matrix_elt *,
                               int, int));
 
@@ -101,7 +104,8 @@ calculate_scrolling (frame, matrix, window_size, lines_below,
   register struct matrix_elt *p, *p1;
   register int cost, cost1;
 
-  int lines_moved = window_size + (scroll_region_ok ? 0 : lines_below);
+  int lines_moved = window_size
+    + (FRAME_SCROLL_REGION_OK (frame) ? 0 : lines_below);
   /* first_insert_cost[I] is the cost of doing the first insert-line
      at the i'th line of the lines we are considering,
      where I is origin 1 (as it is below).  */
@@ -241,7 +245,8 @@ calculate_scrolling (frame, matrix, window_size, lines_below,
    of lines.  */
 
 static void
-do_scrolling (current_matrix, matrix, window_size, unchanged_at_top)
+do_scrolling (frame, current_matrix, matrix, window_size, unchanged_at_top)
+     struct frame *frame;
      struct glyph_matrix *current_matrix;
      struct matrix_elt *matrix;
      int window_size;
@@ -308,12 +313,12 @@ do_scrolling (current_matrix, matrix, window_size, unchanged_at_top)
           /* Set the terminal window, if not done already.  */
           if (! terminal_window_p)
             {
-              set_terminal_window (window_size + unchanged_at_top);
+              set_terminal_window (frame, window_size + unchanged_at_top);
               terminal_window_p = 1;
             }
 
           /* Delete lines on the terminal.  */
-          ins_del_lines (j + unchanged_at_top, - p->deletecount);
+          ins_del_lines (frame, j + unchanged_at_top, - p->deletecount);
         }
       else
         {
@@ -338,7 +343,7 @@ do_scrolling (current_matrix, matrix, window_size, unchanged_at_top)
       /* Set the terminal window if not yet done.  */
       if (!terminal_window_p)
         {
-          set_terminal_window (window_size + unchanged_at_top);
+          set_terminal_window (frame, window_size + unchanged_at_top);
           terminal_window_p = 1;
         }
 
@@ -347,7 +352,7 @@ do_scrolling (current_matrix, matrix, window_size, unchanged_at_top)
           --queue;
 
           /* Do the deletion on the terminal.  */
-          ins_del_lines (queue->pos, queue->count);
+          ins_del_lines (frame, queue->pos, queue->count);
 
           /* All lines in the range deleted become empty in the glyph
              matrix.  Assign to them glyph rows that are not retained.
@@ -380,7 +385,7 @@ do_scrolling (current_matrix, matrix, window_size, unchanged_at_top)
   CHECK_MATRIX (current_matrix);
 
   if (terminal_window_p)
-    set_terminal_window (0);
+    set_terminal_window (frame, 0);
 }
 
 
@@ -467,7 +472,8 @@ calculate_direct_scrolling (frame, matrix, window_size, lines_below,
   /* Overhead of setting the scroll window, plus the extra cost
      cost of scrolling by a distance of one.  The extra cost is
      added once for consistency with the cost vectors */
-  scroll_overhead = scroll_region_cost + extra_cost;
+  scroll_overhead
+    = FRAME_SCROLL_REGION_COST (frame) + extra_cost;
 
   /* initialize the top left corner of the matrix */
   matrix->writecost = 0;
@@ -650,8 +656,9 @@ calculate_direct_scrolling (frame, matrix, window_size, lines_below,
    the cost matrix for this approach is constructed. */
 
 static void
-do_direct_scrolling (current_matrix, cost_matrix, window_size,
-                     unchanged_at_top)
+do_direct_scrolling (frame, current_matrix, cost_matrix,
+                     window_size, unchanged_at_top)
+     struct frame *frame;
      struct glyph_matrix *current_matrix;
      struct matrix_elt *cost_matrix;
      int window_size;
@@ -742,9 +749,9 @@ do_direct_scrolling (current_matrix, cost_matrix, window_size,
           if (i > j)
             {
               /* Immediately insert lines */
-              set_terminal_window (i + unchanged_at_top);
+              set_terminal_window (frame, i + unchanged_at_top);
               terminal_window_p = 1;
-              ins_del_lines (j - n_to_write + unchanged_at_top, i - j);
+              ins_del_lines (frame, j - n_to_write + unchanged_at_top, i - j);
             }
           else if (i < j)
             {
@@ -774,9 +781,9 @@ do_direct_scrolling (current_matrix, cost_matrix, window_size,
           --queue;
           if (queue->count)
             {
-              set_terminal_window (queue->window);
+              set_terminal_window (frame, queue->window);
               terminal_window_p = 1;
-              ins_del_lines (queue->pos, queue->count);
+              ins_del_lines (frame, queue->pos, queue->count);
             }
           else
             {
@@ -799,7 +806,7 @@ do_direct_scrolling (current_matrix, cost_matrix, window_size,
                        copy_from, retained_p);
 
   if (terminal_window_p)
-    set_terminal_window (0);
+    set_terminal_window (frame, 0);
 }
 
 
@@ -819,13 +826,13 @@ scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom,
   matrix = ((struct matrix_elt *)
             alloca ((window_size + 1) * (window_size + 1) * sizeof *matrix));
 
-  if (scroll_region_ok)
+  if (FRAME_SCROLL_REGION_OK (frame))
     {
       calculate_direct_scrolling (frame, matrix, window_size,
                                   unchanged_at_bottom,
                                   draw_cost, old_draw_cost,
                                   old_hash, new_hash, free_at_end);
-      do_direct_scrolling (frame->current_matrix,
+      do_direct_scrolling (frame, frame->current_matrix,
                            matrix, window_size, unchanged_at_top);
     }
   else
@@ -833,7 +840,8 @@ scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom,
       calculate_scrolling (frame, matrix, window_size, unchanged_at_bottom,
                            draw_cost, old_hash, new_hash,
                            free_at_end);
-      do_scrolling (frame->current_matrix, matrix, window_size,
+      do_scrolling (frame,
+                    frame->current_matrix, matrix, window_size,
                     unchanged_at_top);
     }
 }
@@ -915,7 +923,7 @@ scroll_cost (frame, from, to, amount)
   if (amount == 0)
     return 0;
 
-  if (! scroll_region_ok)
+  if (! FRAME_SCROLL_REGION_OK (frame))
     limit = height;
   else if (amount > 0)
     limit += amount;