*.[chm]: Number every assignment to windows_or_buffers_changed.

src/ChangeLog

+2013-11-06  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+	* *.[chm]: Number every assignment to windows_or_buffers_changed so we
+	can track why it is set.
+
 2013-11-06  Paul Eggert  <eggert@cs.ucla.edu>
 
 	Integer-related fixes for term.c etc.
 	* dispextern.h (face_tty_specified_color): New function.
 	* term.c (turn_on_face): Don't rely on undefined behavior when
-	assigning an out-of-range value to 'long'.  Simplify
-	test for toggling highlight.
+	assigning an out-of-range value to 'long'.
+	Simplify test for toggling highlight.
 	(tty_capable_p): Omit last two (unused) args.  All callers changed.
 	* term.c (tty_capable_p, tty_menu_display, tty_menu_add_selection)
 	(read_menu_input, tty_menu_activate, tty_menu_show):
@@ -232,8 +237,8 @@
 
 2013-11-02  Jan Djärv  <jan.h.d@swipnet.se>
 
-	* xfaces.c (check_lface_attrs, realize_default_face): Add
-	LFACE_DISTANT_FOREGROUND_INDEX (Bug#15788).
+	* xfaces.c (check_lface_attrs, realize_default_face):
+	Add LFACE_DISTANT_FOREGROUND_INDEX (Bug#15788).
 	(realize_default_face): Set DISTANT_FOREGROUND to unspecified_fg.
 
 2013-11-02  Paul Eggert  <eggert@cs.ucla.edu>
@@ -257,13 +262,13 @@
 	foreground.
 	(syms_of_xfaces): DEFSYM QCdistant_foreground.
 
-	* dispextern.h (lface_attribute_index): Add
-	LFACE_DISTANT_FOREGROUND_INDEX.
+	* dispextern.h (lface_attribute_index):
+	Add LFACE_DISTANT_FOREGROUND_INDEX.
 
 2013-11-01  Claudio Bley  <claudio.bley@googlemail.com>
 
-	* image.c (pbm_next_char): New function.  See
-	http://netpbm.sourceforge.net/doc/pbm.html for the details.
+	* image.c (pbm_next_char): New function.
+	See http://netpbm.sourceforge.net/doc/pbm.html for the details.
 	(pbm_scan_number): Use it.
 	(Qlibjpeg_version): New variable.
 	(syms_of_image): DEFSYM and initialize it.

src/buffer.c

@@ -2705,7 +2705,7 @@ current buffer is cleared.  */)
 
   /* If buffer is shown in a window, let redisplay consider other windows.  */
   if (buffer_window_count (current_buffer))
-    ++windows_or_buffers_changed;
+    windows_or_buffers_changed = 10;
 
   /* Copy this buffer's new multibyte status
      into all of its indirect buffers.  */
@@ -3911,11 +3911,11 @@ modify_overlay (struct buffer *buf, ptrdiff_t start, ptrdiff_t end)
     {
       /* ... it's visible in other window than selected,  */
       if (buf != XBUFFER (XWINDOW (selected_window)->contents))
-	windows_or_buffers_changed = 1;
+	windows_or_buffers_changed = 11;
       /* ... or if we modify an overlay at the end of the buffer
 	 and so we cannot be sure that window end is still valid.  */
       else if (end >= ZV && start <= ZV)
-	windows_or_buffers_changed = 1;
+	windows_or_buffers_changed = 12;
     }
 
   ++BUF_OVERLAY_MODIFF (buf);

src/dispnew.c

@@ -2940,7 +2940,7 @@ redraw_frame (struct frame *f)
   clear_frame (f);
   clear_current_matrices (f);
   update_end (f);
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 13;
   /* Mark all windows as inaccurate, so that every window will have
      its redisplay done.  */
   mark_window_display_accurate (FRAME_ROOT_WINDOW (f), 0);

src/frame.c

@@ -231,7 +231,7 @@ set_menu_bar_lines (struct frame *f, Lisp_Object value, Lisp_Object oldval)
 
   if (nlines != olines)
     {
-      windows_or_buffers_changed++;
+      windows_or_buffers_changed = 14;
       FRAME_WINDOW_SIZES_CHANGED (f) = 1;
       FRAME_MENU_BAR_LINES (f) = nlines;
       set_menu_bar_lines_1 (f->root_window, nlines - olines);
@@ -1699,7 +1699,7 @@ If omitted, FRAME defaults to the currently selected frame.  */)
   make_frame_visible_1 (f->root_window);
 
   /* Make menu bar update for the Buffers and Frames menus.  */
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 15;
 
   XSETFRAME (frame, f);
   return frame;
@@ -1753,7 +1753,7 @@ displayed in the terminal.  */)
 #endif
 
   /* Make menu bar update for the Buffers and Frames menus.  */
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 16;
 
   return Qnil;
 }
@@ -1776,7 +1776,7 @@ If omitted, FRAME defaults to the currently selected frame.  */)
 #endif
 
   /* Make menu bar update for the Buffers and Frames menus.  */
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 17;
 
   return Qnil;
 }
@@ -3245,7 +3245,7 @@ x_set_font_backend (struct frame *f, Lisp_Object new_value, Lisp_Object old_valu
       XSETFRAME (frame, f);
       x_set_font (f, Fframe_parameter (frame, Qfont), Qnil);
       ++face_change_count;
-      ++windows_or_buffers_changed;
+      windows_or_buffers_changed = 18;
     }
 }
 

src/image.c

@@ -1521,7 +1521,7 @@ clear_image_cache (struct frame *f, Lisp_Object filter)
 		clear_current_matrices (fr);
 	    }
 
-	  ++windows_or_buffers_changed;
+	  windows_or_buffers_changed = 19;
 	}
 
       unblock_input ();

src/insdel.c

@@ -1803,7 +1803,7 @@ prepare_to_modify_buffer_1 (ptrdiff_t start, ptrdiff_t end,
      let redisplay consider other windows if this buffer is visible.  */
   if (XBUFFER (XWINDOW (selected_window)->contents) != current_buffer
       && buffer_window_count (current_buffer))
-    ++windows_or_buffers_changed;
+    windows_or_buffers_changed = 20;
 
   if (buffer_intervals (current_buffer))
     {

src/keyboard.c

@@ -1667,7 +1667,7 @@ command_loop_1 (void)
 	       cluster to prevent automatic composition.  To recover
 	       the automatic composition, we must update the
 	       display.  */
-	    windows_or_buffers_changed++;
+	    windows_or_buffers_changed = 21;
 	  if (!already_adjusted)
 	    adjust_point_for_property (last_point_position,
 				       MODIFF != prev_modiff);

src/minibuf.c

@@ -866,7 +866,7 @@ read_minibuf_unwind (void)
     resize_mini_window (XWINDOW (window), 0);
 
   /* Enforce full redisplay.  FIXME: make it more selective.  */
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 22;
 
   /* In case the previous minibuffer displayed in this miniwindow is
      dead, we may keep displaying this buffer (tho it's inactive), so reset it,

src/nsfns.m

@@ -403,23 +403,23 @@ Turn the input menu (an NSMenu) into a lisp list for tracking on lisp side
       if (!NILP (f->title))
         arg = f->title;
       else
-        /* explicit name and no icon-name -> explicit_name */
+        /* Explicit name and no icon-name -> explicit_name.  */
         if (f->explicit_name)
           arg = f->name;
         else
           {
-            /* no explicit name and no icon-name ->
-               name has to be rebuild from icon_title_format */
-            windows_or_buffers_changed++;
+            /* No explicit name and no icon-name ->
+               name has to be rebuild from icon_title_format.  */
+            windows_or_buffers_changed = 62;
             return;
           }
     }
 
   /* Don't change the name if it's already NAME.  */
-  if ([[view window] miniwindowTitle] &&
-      ([[[view window] miniwindowTitle]
+  if ([[view window] miniwindowTitle]
+      && ([[[view window] miniwindowTitle]
              isEqualToString: [NSString stringWithUTF8String:
-                                           SSDATA (arg)]]))
+					  SSDATA (arg)]]))
     return;
 
   [[view window] setMiniwindowTitle:

src/nsterm.m

@@ -6089,7 +6089,7 @@ - (void)windowDidDeminiaturize: sender
 
   SET_FRAME_ICONIFIED (emacsframe, 0);
   SET_FRAME_VISIBLE (emacsframe, 1);
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 63;
 
   if (emacs_event)
     {

src/w32fns.c

@@ -1664,7 +1664,7 @@ x_set_tool_bar_lines (struct frame *f, Lisp_Object value, Lisp_Object oldval)
     nlines = 0;
 
   /* Make sure we redisplay all windows in this frame.  */
-  ++windows_or_buffers_changed;
+  windows_or_buffers_changed = 23;
 
   delta = nlines - FRAME_TOOL_BAR_LINES (f);
 

src/window.c

@@ -500,7 +500,7 @@ select_window (Lisp_Object window, Lisp_Object norecord, int inhibit_point_swap)
 
   select_window_1 (window, inhibit_point_swap);
   bset_last_selected_window (XBUFFER (w->contents), window);
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 24;
 
  record_and_return:
   /* record_buffer can run QUIT, so make sure it is run only after we have
@@ -1553,7 +1553,7 @@ Return POS.  */)
       set_marker_restricted (w->pointm, pos, w->contents);
       /* We have to make sure that redisplay updates the window to show
 	 the new value of point.  */
-      ++windows_or_buffers_changed;
+      windows_or_buffers_changed = 25;
     }
 
   return pos;
@@ -1576,7 +1576,7 @@ overriding motion of point in order to display at this exact start.  */)
   w->update_mode_line = 1;
   if (w != XWINDOW (selected_window))
     /* Enforce full redisplay.  FIXME: make it more selective.  */
-    windows_or_buffers_changed++;
+    windows_or_buffers_changed = 26;
 
   return pos;
 }
@@ -2837,7 +2837,7 @@ window-start value is reasonable when this function is called.  */)
     }
   free_window_matrices (r);
 
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 27;
   Vwindow_list = Qnil;
   FRAME_WINDOW_SIZES_CHANGED (f) = 1;
   resize_failed = 0;
@@ -3171,7 +3171,7 @@ set_window_buffer (Lisp_Object window, Lisp_Object buffer,
     }
   /* Maybe we could move this into the `if' but it's not obviously safe and
      I doubt it's worth the trouble.  */
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 28;
 
   /* We must select BUFFER for running the window-scroll-functions.  */
   /* We can't check ! NILP (Vwindow_scroll_functions) here
@@ -3278,7 +3278,7 @@ displaying that buffer.  */)
 {
   if (NILP (object))
     {
-      windows_or_buffers_changed++;
+      windows_or_buffers_changed = 29;
       update_mode_lines++;
       return Qt;
     }
@@ -3646,7 +3646,7 @@ be applied on the Elisp level.  */)
   block_input ();
   window_resize_apply (r, horflag);
 
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 30;
   FRAME_WINDOW_SIZES_CHANGED (f) = 1;
 
   adjust_frame_glyphs (f);
@@ -3741,7 +3741,7 @@ resize_frame_windows (struct frame *f, int size, bool horflag)
 	}
     }
 
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 31;
 }
 
 
@@ -3862,7 +3862,7 @@ set correctly.  See the code of `split-window' for how this is done.  */)
   else
     p = XWINDOW (o->parent);
 
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 32;
   FRAME_WINDOW_SIZES_CHANGED (f) = 1;
   new = make_window ();
   n = XWINDOW (new);
@@ -4012,7 +4012,7 @@ Signal an error when WINDOW is the only window on its frame.  */)
 	    hlinfo->mouse_face_window = Qnil;
 	}
 
-      windows_or_buffers_changed++;
+      windows_or_buffers_changed = 33;
       Vwindow_list = Qnil;
       FRAME_WINDOW_SIZES_CHANGED (f) = 1;
 
@@ -4134,7 +4134,7 @@ grow_mini_window (struct window *w, int delta)
       w->top_line = r->top_line + r->total_lines;
       w->total_lines -= XINT (value);
       /* Enforce full redisplay.  FIXME: make it more selective.  */
-      windows_or_buffers_changed++;
+      windows_or_buffers_changed = 34;
       adjust_frame_glyphs (f);
       unblock_input ();
     }
@@ -4168,7 +4168,7 @@ shrink_mini_window (struct window *w)
 	  w->top_line = r->top_line + r->total_lines;
 	  w->total_lines = 1;
 	  /* Enforce full redisplay.  FIXME: make it more selective.  */
-	  windows_or_buffers_changed++;
+	  windows_or_buffers_changed = 35;
 	  adjust_frame_glyphs (f);
 	  unblock_input ();
 	}
@@ -4208,7 +4208,7 @@ DEFUN ("resize-mini-window-internal", Fresize_mini_window_internal, Sresize_mini
       w->total_lines = XFASTINT (w->new_total);
       w->top_line = r->top_line + r->total_lines;
 
-      windows_or_buffers_changed++;
+      windows_or_buffers_changed = 36;
       FRAME_WINDOW_SIZES_CHANGED (f) = 1;
       adjust_frame_glyphs (f);
       unblock_input ();
@@ -4830,7 +4830,7 @@ scroll_command (Lisp_Object n, int direction)
       Fset_buffer (XWINDOW (selected_window)->contents);
 
       /* Make redisplay consider other windows than just selected_window.  */
-      ++windows_or_buffers_changed;
+      windows_or_buffers_changed = 37;
     }
 
   if (NILP (n))
@@ -4940,7 +4940,7 @@ specifies the window to scroll.  This takes precedence over
 
   /* Don't screw up if window_scroll gets an error.  */
   record_unwind_protect (save_excursion_restore, save_excursion_save ());
-  ++windows_or_buffers_changed;
+  windows_or_buffers_changed = 38;
 
   Fset_buffer (w->contents);
   SET_PT_BOTH (marker_position (w->pointm), marker_byte_position (w->pointm));
@@ -5575,7 +5575,7 @@ the return value is nil.  Otherwise the value is t.  */)
 			   BUF_PT_BYTE (XBUFFER (w->contents)));
 	}
 
-      windows_or_buffers_changed++;
+      windows_or_buffers_changed = 39;
       FRAME_WINDOW_SIZES_CHANGED (f) = 1;
 
       /* Problem: Freeing all matrices and later allocating them again
@@ -6103,7 +6103,7 @@ apply_window_adjustment (struct window *w)
   adjust_window_margins (w);
   clear_glyph_matrix (w->current_matrix);
   w->window_end_valid = 0;
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 40;
   adjust_frame_glyphs (XFRAME (WINDOW_FRAME (w)));
 }
 

src/xdisp.c

@@ -9633,7 +9633,7 @@ message_dolog (const char *m, ptrdiff_t nbytes, bool nlflag, bool multibyte)
 	 shown in some window.  So we must manually incrementing
 	 windows_or_buffers_changed here to make up for that.  */
       if (shown)
-	windows_or_buffers_changed++;
+	windows_or_buffers_changed = 41;
       else
 	windows_or_buffers_changed = old_windows_or_buffers_changed;
       message_log_need_newline = !nlflag;
@@ -10336,7 +10336,7 @@ resize_echo_area_exactly (void)
 					 (intptr_t) w, resize_exactly);
       if (resized_p)
 	{
-	  ++windows_or_buffers_changed;
+	  windows_or_buffers_changed = 42;
 	  ++update_mode_lines;
 	  redisplay_internal ();
 	}
@@ -10733,7 +10733,7 @@ clear_garbaged_frames (void)
 
       frame_garbaged = 0;
       if (changed_count)
-	++windows_or_buffers_changed;
+	windows_or_buffers_changed = 43;
     }
 }
 
@@ -10802,7 +10802,7 @@ echo_area_display (int update_frame_p)
 		 pending input.  */
 	      ptrdiff_t count = SPECPDL_INDEX ();
 	      specbind (Qredisplay_dont_pause, Qt);
-	      windows_or_buffers_changed = 1;
+	      windows_or_buffers_changed = 44;
 	      redisplay_internal ();
 	      unbind_to (count, Qnil);
 	    }
@@ -10821,11 +10821,11 @@ echo_area_display (int update_frame_p)
 	     redisplay displays the minibuffer, so that the cursor will
 	     be replaced with what the minibuffer wants.  */
 	  if (cursor_in_echo_area)
-	    ++windows_or_buffers_changed;
+	    windows_or_buffers_changed = 45;
 	}
     }
   else if (!EQ (mini_window, selected_window))
-    windows_or_buffers_changed++;
+    windows_or_buffers_changed = 46;
 
   /* Last displayed message is now the current message.  */
   echo_area_buffer[1] = echo_area_buffer[0];
@@ -12947,7 +12947,7 @@ redisplay_internal (void)
      realized faces, which includes the faces referenced from current
      matrices.  So, we can't reuse current matrices in this case.  */
   if (face_change_count)
-    ++windows_or_buffers_changed;
+    windows_or_buffers_changed = 47;
 
   if ((FRAME_TERMCAP_P (sf) || FRAME_MSDOS_P (sf))
       && FRAME_TTY (sf)->previous_frame != sf)
@@ -12955,7 +12955,7 @@ redisplay_internal (void)
       /* Since frames on a single ASCII terminal share the same
 	 display area, displaying a different frame means redisplay
 	 the whole thing.  */
-      windows_or_buffers_changed++;
+      windows_or_buffers_changed = 48;
       SET_FRAME_GARBAGED (sf);
 #ifndef DOS_NT
       set_tty_color_mode (FRAME_TTY (sf), sf);
@@ -13031,7 +13031,7 @@ redisplay_internal (void)
   /* If specs for an arrow have changed, do thorough redisplay
      to ensure we remove any arrow that should no longer exist.  */
   if (overlay_arrows_changed_p ())
-    consider_all_windows_p = windows_or_buffers_changed = 1;
+    consider_all_windows_p = windows_or_buffers_changed = 49;
 
   /* Normally the message* functions will have already displayed and
      updated the echo area, but the frame may have been trashed, or
@@ -13064,7 +13064,7 @@ redisplay_internal (void)
 	{
 	  consider_all_windows_p = 1;
 	  ++update_mode_lines;
-	  ++windows_or_buffers_changed;
+	  windows_or_buffers_changed = 50;
 
 	  /* If window configuration was changed, frames may have been
 	     marked garbaged.  Clear them or we will experience
@@ -13084,7 +13084,7 @@ redisplay_internal (void)
 	 needs to be rewritten with two variables, consider_all_windows and
 	 consider_all_frames.  */
       consider_all_windows_p = 1;
-      ++windows_or_buffers_changed;
+      windows_or_buffers_changed = 51;
       ++update_mode_lines;
 
       /* If window configuration was changed, frames may have been
@@ -13524,7 +13524,7 @@ redisplay_internal (void)
 	}
 
       if (new_count != number_of_visible_frames)
-	windows_or_buffers_changed++;
+	windows_or_buffers_changed = 52;
     }
 
   /* Change frame size now if a change is pending.  */

src/xfaces.c

@@ -788,7 +788,7 @@ Optional THOROUGHLY non-nil means try to free unused fonts, too.  */)
 {
   clear_face_cache (!NILP (thoroughly));
   ++face_change_count;
-  ++windows_or_buffers_changed;
+  windows_or_buffers_changed = 53;
   return Qnil;
 }
 
@@ -2637,7 +2637,7 @@ Value is a vector of face attributes.  */)
   if (NILP (Fget (face, Qface_no_inherit)))
     {
       ++face_change_count;
-      ++windows_or_buffers_changed;
+      windows_or_buffers_changed = 54;
     }
 
   eassert (LFACEP (lface));
@@ -2716,7 +2716,7 @@ The value is TO.  */)
   if (NILP (Fget (to, Qface_no_inherit)))
     {
       ++face_change_count;
-      ++windows_or_buffers_changed;
+      windows_or_buffers_changed = 55;
     }
 
   return to;
@@ -3207,7 +3207,7 @@ FRAME 0 means change the face on all frames, and change the default
       && NILP (Fequal (old_value, value)))
     {
       ++face_change_count;
-      ++windows_or_buffers_changed;
+      windows_or_buffers_changed = 56;
     }
 
   if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value)
@@ -3221,7 +3221,7 @@ FRAME 0 means change the face on all frames, and change the default
 	{
 #ifdef HAVE_WINDOW_SYSTEM
 	  /* Changed font-related attributes of the `default' face are
-	     reflected in changed `font' frame parameters. */
+	     reflected in changed `font' frame parameters.  */
 	  if (FRAMEP (frame)
 	      && (prop_index || EQ (attr, QCfont))
 	      && lface_fully_specified_p (XVECTOR (lface)->contents))
@@ -3380,7 +3380,7 @@ update_face_from_frame_parameter (struct frame *f, Lisp_Object param,
       && NILP (Fget (face, Qface_no_inherit)))
     {
       ++face_change_count;
-      ++windows_or_buffers_changed;
+      windows_or_buffers_changed = 57;
     }
 }
 
@@ -4273,7 +4273,7 @@ free_realized_faces (struct face_cache *c)
       if (WINDOWP (f->root_window))
 	{
 	  clear_current_matrices (f);
-	  ++windows_or_buffers_changed;
+	  windows_or_buffers_changed = 58;
 	}
 
       unblock_input ();

src/xfns.c

@@ -959,7 +959,7 @@ x_set_menu_bar_lines (struct frame *f, Lisp_Object value, Lisp_Object oldval)
     nlines = 0;
 
   /* Make sure we redisplay all windows in this frame.  */
-  windows_or_buffers_changed++;
+  windows_or_buffers_changed = 59;
 
 #if defined (USE_X_TOOLKIT) || defined (USE_GTK)
   FRAME_MENU_BAR_LINES (f) = 0;
@@ -1068,8 +1068,8 @@ x_set_tool_bar_lines (struct frame *f, Lisp_Object value, Lisp_Object oldval)
 
 #else /* !USE_GTK */
 
-     /* Make sure we redisplay all windows in this frame.  */
-  ++windows_or_buffers_changed;
+  /* Make sure we redisplay all windows in this frame.  */
+  windows_or_buffers_changed = 60;
 
   delta = nlines - FRAME_TOOL_BAR_LINES (f);