* window.h (struct window): Replace hchild, vchild and buffer slots

with the only contents slot.  This is possible because each valid
window may have either the child window (in vertical or horizontal
combination) or buffer to display (for the leaf window).  Using that,
a lof of operations to traverse and/or change window hierarchies may
be simplified.  New member horizontal is used to distinguish between
horizontal and vertical combinations of internal windows.
(WINDOW_LEAF_P, WINDOW_HORIZONTAL_COMBINATION_P)
(WINDOW_VERTICAL_COMBINATION_P): New macros.
(WINDOW_VALID_P, WINDOW_LIVE_P): Adjust to match struct window changes.
* window.c (wset_hchild, wset_vchild): Remove.  Adjust all users.
Use contents slot, not buffer, where appropriate.
(wset_combination): New function.
(wset_buffer): Add eassert.
(Fframe_first_window): Simplify the loop reaching first window.
(Fwindow_buffer): Use WINDOW_LEAF_P.
(Fwindow_top_child): Use WINDOW_VERTICAL_COMBINATION_P.
(Fwindow_left_child): Use WINDOW_HORIZONTAL_COMBINATION_P.
(unshow_buffer): Convert initial debugging check to eassert.
(replace_window, recombine_windows, Fdelete_other_windows_internal)
(make_parent_window, window_resize_check, window_resize_apply)
(resize_frame_windows, Fsplit_window_internal, Fdelete_window_internal)
(Fset_window_configuration, delete_all_child_windows, save_window_save):
Adjust to match struct window changes.
(window_loop): Check for broken markers in CHECK_ALL_WINDOWS.
(mark_window_cursors_off, count_windows, get_leaf_windows)
(foreach_window_1): Simplify the loop.
* alloc.c (mark_object): Do not check for the leaf window because
internal windows has no glyph matrices anyway.
* dispnew.c (clear_window_matrices, showing_window_margins_p)
(allocate_matrices_for_window_redisplay, fake_current_matrices)
(allocate_matrices_for_frame_redisplay, free_window_matrices)
(build_frame_matrix_from_window_tree, mirror_make_current)
(frame_row_to_window, mirror_line_dance, check_window_matrix_pointers)
(update_window_tree, set_window_update_flags): Simplify the loop.
(sync_window_with_frame_matrix_rows): Enforce live window.
Use contents slot, not buffer, where appropriate.
* frame.c (set_menu_bar_lines_1): Use WINDOW_VERTICAL_COMBINATION_P
and WINDOW_HORIZONTAL_COMBINATION_P.
(make_frame_visible_1): Simplify the loop.
Use contents slot, not buffer, where appropriate.
* xdisp.c (hscroll_window_tree, mark_window_display_accurate)
(redisplay_windows, redisplay_mode_lines, update_cursor_in_window_tree)
(expose_window_tree): Likewise.
Use contents slot, not buffer, where appropriate.
* textprop.c (get_char_property_and_overlay): Add CHECK_LIVE_WINDOW
to avoid deleted windows.  Use contents slot instead of buffer.
* buffer.c, dispextern.h, editfns.c, fileio.c, font.c, fringe.c:
* indent.c, insdel.c, keyboard.c, keymap.c, minibuf.c, msdos.c:
* nsfns.m, nsmenu.m, nsterm.m, print.c, w32fns.c, w32menu.c, xfaces.c:
* xfns.c, xmenu.c: Use contents slot, not buffer, where appropriate.

1 files changed, 6 insertions, 6 deletions

diff --git a/src/fringe.c b/src/fringe.c
index fa6f889ba69..f728cd6d5ff 100644
--- a/src/fringe.c
+++ b/src/fringe.c
@@ -699,7 +699,7 @@ get_logical_cursor_bitmap (struct window *w, Lisp_Object cursor)
 {
   Lisp_Object cmap, bm = Qnil;
 
-  if ((cmap = BVAR (XBUFFER (w->buffer), fringe_cursor_alist)), !NILP (cmap))
+  if ((cmap = BVAR (XBUFFER (w->contents), fringe_cursor_alist)), !NILP (cmap))
     {
       bm = Fassq (cursor, cmap);
       if (CONSP (bm))
@@ -736,7 +736,7 @@ get_logical_fringe_bitmap (struct window *w, Lisp_Object bitmap, int right_p, in
      If partial, lookup partial bitmap in default value if not found here.
      If not partial, or no partial spec is present, use non-partial bitmap.  */
 
-  if ((cmap = BVAR (XBUFFER (w->buffer), fringe_indicator_alist)), !NILP (cmap))
+  if ((cmap = BVAR (XBUFFER (w->contents), fringe_indicator_alist)), !NILP (cmap))
     {
       bm1 = Fassq (bitmap, cmap);
       if (CONSP (bm1))
@@ -963,7 +963,7 @@ update_window_fringes (struct window *w, int keep_current_p)
     return 0;
 
   if (!MINI_WINDOW_P (w)
-      && (ind = BVAR (XBUFFER (w->buffer), indicate_buffer_boundaries), !NILP (ind)))
+      && (ind = BVAR (XBUFFER (w->contents), indicate_buffer_boundaries), !NILP (ind)))
     {
       if (EQ (ind, Qleft) || EQ (ind, Qright))
         boundary_top = boundary_bot = arrow_top = arrow_bot = ind;
@@ -1004,7 +1004,7 @@ update_window_fringes (struct window *w, int keep_current_p)
             {
               if (top_ind_rn < 0 && row->visible_height > 0)
                 {
-                  if (MATRIX_ROW_START_CHARPOS (row) <= BUF_BEGV (XBUFFER (w->buffer))
+                  if (MATRIX_ROW_START_CHARPOS (row) <= BUF_BEGV (XBUFFER (w->contents))
                       && !MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P (w, row))
                     row->indicate_bob_p = !NILP (boundary_top);
                   else
@@ -1014,7 +1014,7 @@ update_window_fringes (struct window *w, int keep_current_p)
 
               if (bot_ind_rn < 0)
                 {
-                  if (MATRIX_ROW_END_CHARPOS (row) >= BUF_ZV (XBUFFER (w->buffer))
+                  if (MATRIX_ROW_END_CHARPOS (row) >= BUF_ZV (XBUFFER (w->contents))
                       && !MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P (w, row))
                     row->indicate_eob_p = !NILP (boundary_bot), bot_ind_rn = rn;
                   else if (y + row->height >= yb)
@@ -1024,7 +1024,7 @@ update_window_fringes (struct window *w, int keep_current_p)
         }
     }
 
-  empty_pos = BVAR (XBUFFER (w->buffer), indicate_empty_lines);
+  empty_pos = BVAR (XBUFFER (w->contents), indicate_empty_lines);
   if (!NILP (empty_pos) && !EQ (empty_pos, Qright))
     empty_pos = WINDOW_LEFT_FRINGE_WIDTH (w) == 0 ? Qright : Qleft;