* termhooks.h (FRAME_MUST_WRITE_SPACES, FRAME_LINE_INS_DEL_OK)

(FRAME_CHAR_INS_DEL_OK, FRAME_SCROLL_REGION_OK)
(FRAME_SCROLL_REGION_COST, FRAME_MEMORY_BELOW_FRAME):
Adjust to match the change described below.
(struct terminal): Move must_write_spaces, line_ins_del_ok,
char_ins_del_ok, scroll_region_ok, scroll_region_cost and
memory_below_frame members to...
* termchar.h (struct tty_display_info): ...here because they're
relevant only on TTYs.  Prefer unsigned bitfield where appropriate.
* term.c (init_tty):
* nsterm.m (ns_create_terminal):
* w32term.c (w32_create_terminal):
* xterm.c (x_create_terminal): Adjust users.
* dispnew.c (line_hash_code, line_draw_cost): Pass frame arg
to filter out non-TTY frames.  Adjust comment.
(scrolling): Adjust user.  Prefer eassert for debugging check.

1 files changed, 19 insertions, 0 deletions

diff --git a/src/termchar.h b/src/termchar.h
index 031f4e4034b..feb89e02d0e 100644
--- a/src/termchar.h
+++ b/src/termchar.h
@@ -197,6 +197,25 @@ struct tty_display_info
 
   /* Non-zero means we are displaying a TTY menu on this tty.  */
   unsigned showing_menu : 1;
+
+  /* Nonzero means spaces in the text must actually be output;
+     can't just skip over some columns to leave them blank.  */
+  unsigned must_write_spaces : 1;
+
+  /* Nonzero if TTY can insert and delete lines.  */
+  unsigned line_ins_del_ok : 1;
+
+  /* Nonzero if TTY can insert and delete chars.  */
+  unsigned char_ins_del_ok : 1;
+
+  /* Nonzero if TTY supports setting the scroll window.  */
+  unsigned scroll_region_ok : 1;
+
+  /* Nonzero if TTY remembers lines scrolled off bottom.  */
+  unsigned memory_below_frame : 1;
+
+  /* Cost of setting the scroll window, measured in characters.  */
+  int scroll_region_cost;	
 };
 
 /* A chain of structures for all tty devices currently in use. */