xemacs-beta: src/redisplay.c comparison

comparison src/redisplay.c @ 398:74fd4e045ea6 r21-2-29

Import from CVS: tag r21-2-29

author	cvs
date	Mon, 13 Aug 2007 11:13:30 +0200
parents	bbff43aa5eb7
children	a86b2b5e0111

comparison

equal deleted inserted replaced

-:f4aeb21a5bad
+:74fd4e045ea6
 #include "elhash.h"
 #include "extents.h"
 #include "faces.h"
 #include "frame.h"
 #include "glyphs.h"
+#include "gutter.h"
 #include "insdel.h"
 #include "menubar.h"
 #include "objects.h"
 #include "process.h"
 #include "redisplay.h"
 typedef struct position_redisplay_data_type
 {
 /* This information is normally filled in by the create_*_block
 routines and is used by the add_*_rune routines. */
 Lisp_Object window;
+/* if we are working with strings rather than buffers we need a
+handle to the string */
+Lisp_Object string;
 struct device *d;
 struct display_block *db;
 struct display_line *dl;
 Emchar ch;		/* Character that is to be added.  This is
 			   used to communicate this information to
 			   need to be skipped.  This is used for horizontal
 			   scrolling, where a certain number of columns
 			   (those off the left side of the screen) need
 			   to be skipped before anything is displayed. */
 Bytind bi_start_col_enabled;
+int start_col_xoffset;	/* Number of pixels that still need to
+			   be skipped.  This is used for
+			   horizontal scrolling of glyphs, where we want
+			   to be able to scroll over part of the glyph. */
 int hscroll_glyph_width_adjust;  /* how much the width of the hscroll
 				      glyph differs from space_width (w).
 				      0 if no hscroll glyph was used,
 				      i.e. the window is not scrolled
 {
 Dynarr_declare (prop_block);
 } prop_block_dynarr;
-static void generate_formatted_string_db (Lisp_Object format_str,
-					  Lisp_Object result_str,
-					  struct window *w,
-					  struct display_line *dl,
-					  struct display_block *db,
-					  face_index findex, int min_pixpos,
-					  int max_pixpos, int type);
 static Charcount generate_fstring_runes (struct window *w, pos_data *data,
 					 Charcount pos, Charcount min_pos,
 					 Charcount max_pos, Lisp_Object elt,
 					 int depth, int max_pixsize,
-					 face_index findex, int type);
+					 face_index findex, int type,
+					 Charcount *offset,
+					 Lisp_Object cur_ext);
 static prop_block_dynarr *add_glyph_rune (pos_data *data,
 					  struct glyph_block *gb,
 					  int pos_type, int allow_cursor,
 					  struct glyph_cachel *cachel);
 static Bytind create_text_block (struct window *w, struct display_line *dl,
-				 Bytind bi_start_pos, int start_col,
+				 Bytind bi_start_pos, prop_block_dynarr **prop,
-				 prop_block_dynarr **prop,
 				 int type);
 static int create_overlay_glyph_block (struct window *w,
 				       struct display_line *dl);
 static void create_left_glyph_block (struct window *w,
 				     struct display_line *dl,
 routines.  We used to just give each window a third set.  However,
 we always fully regenerate the structures when needed so there
 isn't any reason we need more than a single set. */
 display_line_dynarr *cmotion_display_lines;
-/* Used by generate_formatted_string.  Global because they get used so
-much that the dynamic allocation time adds up. */
-Emchar_dynarr *formatted_string_emchar_dynarr;
-struct display_line formatted_string_display_line;
 /* We store the extents that we need to generate in a Dynarr and then
 frob them all on at the end of generating the string.  We do it
 this way rather than adding them as we generate the string because
 we don't store the text into the resulting string until we're done
 (to avoid having to resize the string multiple times), and we don't
 want to go around adding extents to a string when the extents might
 stretch off the end of the string. */
-EXTENT_dynarr *formatted_string_extent_dynarr;
+static EXTENT_dynarr *formatted_string_extent_dynarr;
-Bytecount_dynarr *formatted_string_extent_start_dynarr;
+static Bytecount_dynarr *formatted_string_extent_start_dynarr;
-Bytecount_dynarr *formatted_string_extent_end_dynarr;
+static Bytecount_dynarr *formatted_string_extent_end_dynarr;
 /* #### probably temporary */
 int cache_adjustment;
 /* Minimum visible pixel width of clipped glyphs at right margin. */
 int horizontal_clip;
 /* Set if currently inside update_line_start_cache. */
-int updating_line_start_cache;
+static int updating_line_start_cache;
 /* Nonzero means reading single-character input with prompt
 so put cursor on minibuffer after the prompt.  */
 int cursor_in_echo_area;
 Lisp_Object Qcursor_in_echo_area;
 /* non-zero if any displayed subwindow is in need of updating
 somewhere. */
 int subwindows_changed;
 int subwindows_changed_set;
+/* non-zero if any displayed subwindow is in need of updating
+somewhere. */
+int subwindows_state_changed;
+int subwindows_state_changed_set;
 /* This variable is 1 if the icon has to be updated.
 It is set to 1 when `frame-icon-glyph' changes. */
 int icon_changed;
 int icon_changed_set;
 /* non-nil if any toolbar has changed */
 int toolbar_changed;
 int toolbar_changed_set;
+/* non-nil if any gutter has changed */
+int gutter_changed;
+int gutter_changed_set;
 /* non-nil if any window has changed since the last time redisplay completed */
 int windows_changed;
 /* non-nil if any frame's window structure has changed since the last
 time redisplay completed */
 int windows_structure_changed;
 /* If non-nil, use vertical bar cursor. */
 Lisp_Object Vbar_cursor;
 Lisp_Object Qbar_cursor;
 int visible_bell;	/* If true and the terminal will support it
 			   then the frame will flash instead of
 			   beeping when an error occurs */
 Lisp_Object Voverlay_arrow_position;
 /* String to display for the arrow.  */
 Lisp_Object Voverlay_arrow_string;
 Lisp_Object Vwindow_size_change_functions;
-Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions;
+Lisp_Object Vwindow_scroll_functions;
 Lisp_Object Qredisplay_end_trigger_functions, Vredisplay_end_trigger_functions;
 #define INHIBIT_REDISPLAY_HOOKS  /* #### Until we've thought about
 				    this more. */
 #ifndef INHIBIT_REDISPLAY_HOOKS
 Think about this for 19.14. */
 Lisp_Object Vpre_redisplay_hook, Vpost_redisplay_hook;
 Lisp_Object Qpre_redisplay_hook, Qpost_redisplay_hook;
 #endif /* INHIBIT_REDISPLAY_HOOKS */
-int last_display_warning_tick, display_warning_tick;
+static int last_display_warning_tick, display_warning_tick;
 Lisp_Object Qdisplay_warning_buffer;
 int inhibit_warning_display;
 Lisp_Object Vleft_margin_width, Vright_margin_width;
 Lisp_Object Vminimum_line_ascent, Vminimum_line_descent;
 Lisp_Object Vuse_left_overflow, Vuse_right_overflow;
 Lisp_Object Vtext_cursor_visible_p;
 int column_number_start_at_one;
+#define WINDOW_SCROLLED(w) \
+(w->hscroll > 0 || w->left_xoffset)
 /***************************************************************************/
 /*									   */
 /*              low-level interfaces onto device routines                  */
 /*									   */
 {
 int n_pos = left_pixpos;
 int pix_tab_width = tab_pix_width (w);
 /* Adjust n_pos for any hscrolling which has happened. */
-if (w->hscroll > 1)
+if (WINDOW_SCROLLED (w))
-n_pos -= space_width (w) * (w->hscroll - 1);
+n_pos -= space_width (w) * (w->hscroll - 1) + w->left_xoffset;
 while (n_pos <= start_pixpos)
 n_pos += pix_tab_width;
 return n_pos;
 when the contents of the line reach the right boundary of the given
 window. */
 static Bufpos
 generate_display_line (struct window *w, struct display_line *dl, int bounds,
-		       Bufpos start_pos, int start_col,
+		       Bufpos start_pos, prop_block_dynarr **prop,
-		       prop_block_dynarr **prop,
 		       int type)
 {
 Bufpos ret_bufpos;
 int overlay_width;
 struct buffer *b = XBUFFER (WINDOW_BUFFER (w));
 /* Create a display block for the text region of the line. */
 {
 /* #### urk urk urk!!! Chuck fix this shit! */
 Bytind hacked_up_bytind =
 create_text_block (w, dl, bufpos_to_bytind (b, start_pos),
-			 start_col, prop, type);
+			 prop, type);
 if (hacked_up_bytind > BI_BUF_ZV (b))
 ret_bufpos = BUF_ZV (b) + 1;
 else
 ret_bufpos = bytind_to_bufpos (b, hacked_up_bytind);
 }
 	  struct window *w = XWINDOW (data->window);
 	  struct face_cachel *cachel = WINDOW_FACE_CACHEL (w, data->findex);
 	  Lisp_Object font_instance =
 	    ensure_face_cachel_contains_charset (cachel, data->window,
 						 charset);
-	  struct Lisp_Font_Instance *fi;
+	  Lisp_Font_Instance *fi;
 	  if (EQ (font_instance, Vthe_null_font_instance))
 	    {
 	      font_instance = FACE_CACHEL_FONT (cachel, Vcharset_ascii);
 	      data->font_is_bogus = 1;
 crb->findex = data->findex;
 crb->xpos = data->pixpos;
 crb->width = width;
 if (data->bi_bufpos)
-crb->bufpos =
+{
-bytind_to_bufpos (XBUFFER (WINDOW_BUFFER (XWINDOW (data->window))),
+if (NILP (data->string))
-			data->bi_bufpos);
+	crb->bufpos =
+	  bytind_to_bufpos (XBUFFER (WINDOW_BUFFER (XWINDOW (data->window))),
+			    data->bi_bufpos);
+else
+	crb->bufpos =
+	  bytecount_to_charcount (XSTRING_DATA (data->string), data->bi_bufpos);
+}
 else if (data->is_modeline)
 crb->bufpos = data->modeline_charpos;
 else
 /* fuckme if this shouldn't be an abort. */
 /* abort (); fuckme harder, this abort gets tripped quite often,
 add_disp_table_entry_runes (pos_data *data, Lisp_Object entry)
 {
 prop_block_dynarr *prop = NULL;
 if (VECTORP (entry))
 {
-struct Lisp_Vector *de = XVECTOR (entry);
+Lisp_Vector *de = XVECTOR (entry);
 EMACS_INT len = vector_length (de);
 int elt;
 for (elt = 0; elt < len; elt++)
 	{
 add_glyph_rune (pos_data *data, struct glyph_block *gb, int pos_type,
 		int allow_cursor, struct glyph_cachel *cachel)
 {
 struct window *w = XWINDOW (data->window);
+/* If window faces changed, and glyph instance is text, then
+glyph sizes might have changed too */
+invalidate_glyph_geometry_maybe (gb->glyph, w);
+/* This makes sure the glyph is in the cachels.
+#### We need to change this so that we hold onto the glyph_index
+here, not the glyph itself. */
+get_glyph_cachel_index (w, gb->glyph);
 /* A nil extent indicates a special glyph (ex. truncator). */
 if (NILP (gb->extent)
 || (pos_type == BEGIN_GLYPHS &&
 	  extent_begin_glyph_layout (XEXTENT (gb->extent)) == GL_TEXT)
 || (pos_type == END_GLYPHS &&
 Lisp_Object face;
 if (cachel)
 	width = cachel->width;
 else
-	width = glyph_width (gb->glyph, Qnil, data->findex, data->window);
+	width = glyph_width (gb->glyph, data->window);
 if (!width)
 	return NULL;
-if (data->start_col)
+if (data->start_col || data->start_col_xoffset)
 	{
 	  prop_block_dynarr *retval;
 	  int glyph_char_width = width / space_width (w);
 	  /* If we still have not fully scrolled horizontally after
 	  ascent = cachel->ascent;
 	  descent = cachel->descent;
 	}
 else
 	{
-	  ascent = glyph_ascent (gb->glyph, Qnil, data->findex, data->window);
+	  ascent = glyph_ascent (gb->glyph, data->window);
-	  descent = glyph_descent (gb->glyph, Qnil, data->findex,
+	  descent = glyph_descent (gb->glyph, data->window);
-				   data->window);
 	}
 baseline = glyph_baseline (gb->glyph, data->window);
 if (glyph_contrib_p (gb->glyph, data->window))
 NOTE NOTE NOTE NOTE: This function works with and returns Bytinds.
 You must do appropriate conversion. */
 static Bytind
 create_text_block (struct window *w, struct display_line *dl,
-		   Bytind bi_start_pos, int start_col,
+		   Bytind bi_start_pos, prop_block_dynarr **prop,
-		   prop_block_dynarr **prop,
 		   int type)
 {
 struct frame *f = XFRAME (w->frame);
 struct buffer *b = XBUFFER (w->buffer);
 struct device *d = XDEVICE (f->device);
 only lines that start with less than selective_display columns of
 space will be displayed.  If selective_display is t then all text
 after a ^M is invisible. */
 int selective = (INTP (b->selective_display)
 		   ? XINT (b->selective_display)
-		   : ((!NILP (b->selective_display) ? -1 : 0)));
+		   : (!NILP (b->selective_display) ? -1 : 0));
 /* The variable ctl-arrow allows the user to specify what characters
 can actually be displayed and which octal should be used for.
 #### This variable should probably have some rethought done to
 it.
 /* These values are used by all of the rune addition routines.  We add
 them to this structure for ease of passing. */
 data.d = d;
 XSETWINDOW (data.window, w);
+data.string = Qnil;
 data.db = db;
 data.dl = dl;
 data.bi_bufpos = bi_start_pos;
 data.pixpos = dl->bounds.left_in;
 else
 data.cursor_type = NO_CURSOR;
 data.cursor_x = -1;
 data.start_col = w->hscroll;
+data.start_col_xoffset = w->left_xoffset;
 data.bi_start_col_enabled = (w->hscroll ? bi_start_pos : 0);
 data.hscroll_glyph_width_adjust = 0;
 /* We regenerate the line from the very beginning. */
 Dynarr_reset (db->runes);
 that the cursor shows up properly. */
 		  data.ch = '\n';
 		  data.blank_width = DEVMETH (d, eol_cursor_width, ());
 		  data.findex = DEFAULT_INDEX;
 		  data.start_col = 0;
+		  data.start_col_xoffset = 0;
 		  data.bi_start_col_enabled = 0;
 		  add_emchar_rune (&data);
 		}
 	      int next_tab_start;
 	      int char_tab_width;
 	      int prop_width = 0;
 	      if (data.start_col > 1)
-		tab_start_pixpos -= (space_width (w) * (data.start_col - 1));
+		tab_start_pixpos -= (space_width (w) * (data.start_col - 1))
+		  + data.start_col_xoffset;
 	      next_tab_start =
 		next_tab_position (w, tab_start_pixpos,
 				   dl->bounds.left_in +
 				   data.hscroll_glyph_width_adjust);
 data.ch = '\n';
 data.blank_width = DEVMETH (d, eol_cursor_width, ());
 data.findex = DEFAULT_INDEX;
 data.start_col = 0;
+data.start_col_xoffset = 0;
 data.bi_start_col_enabled = 0;
 data.max_pixpos += data.blank_width;
 add_emchar_rune (&data);
 data.max_pixpos -= data.blank_width;
 data.cursor_x = -1;
 data.findex = DEFAULT_INDEX;
 data.last_charset = Qunbound;
 data.last_findex = DEFAULT_INDEX;
 data.result_str = Qnil;
+data.string = Qnil;
 Dynarr_reset (data.db->runes);
 if (STRINGP (Voverlay_arrow_string))
 {
 	  if (glyph_contrib_p (gb->glyph, window))
 	    {
 	      unsigned short ascent, descent;
 	      Lisp_Object baseline = glyph_baseline (gb->glyph, window);
-	      ascent = glyph_ascent (gb->glyph, Qnil, gb->findex, window);
+	      ascent = glyph_ascent (gb->glyph, window);
-	      descent = glyph_descent (gb->glyph, Qnil, gb->findex, window);
+	      descent = glyph_descent (gb->glyph, window);
 	      /* A pixmap that has not had a baseline explicitly set.
 We use the existing ascent / descent ratio of the
 line. */
 	      if (NILP (baseline))
 if (extent_begin_glyph_layout (XEXTENT (gb->extent)) == GL_WHITESPACE)
 	{
 	  int width;
-	  width = glyph_width (gb->glyph, Qnil, gb->findex, window);
+	  width = glyph_width (gb->glyph, window);
 	  if (white_in_start - width >= left_in_end)
 	    {
 	      white_in_cnt++;
 	      white_in_start -= width;
 	  abort ();	/* these should have been handled in add_glyph_rune */
 	if (extent_begin_glyph_layout (XEXTENT (gb->extent)) ==
 	    GL_INSIDE_MARGIN)
 	  {
-	    gb->width = glyph_width (gb->glyph, Qnil, gb->findex, window);
+	    gb->width = glyph_width (gb->glyph, window);
 	    used_in += gb->width;
 	    Dynarr_add (ib, *gb);
 	  }
 	elt++;
 	  abort ();	/* these should have been handled in add_glyph_rune */
 	if (extent_begin_glyph_layout (XEXTENT (gb->extent)) ==
 	    GL_INSIDE_MARGIN)
 	  {
-	    int width = glyph_width (gb->glyph, Qnil, gb->findex, window);
+	    int width = glyph_width (gb->glyph, window);
 	    if (used_out)
 	      {
 		in_out_cnt++;
 		in_out_start -= width;
 	abort ();	/* these should have been handled in add_glyph_rune */
 if (extent_begin_glyph_layout (XEXTENT (gb->extent)) ==
 	  GL_OUTSIDE_MARGIN)
 	{
-	  int width = glyph_width (gb->glyph, Qnil, gb->findex, window);
+	  int width = glyph_width (gb->glyph, window);
 	  if (out_end + width <= in_out_start)
 	    {
 	      out_cnt++;
 	      out_end += width;
 if (NILP (gb->extent))
 	abort ();	/* these should have been handled in add_glyph_rune */
 if (extent_end_glyph_layout (XEXTENT (gb->extent)) == GL_WHITESPACE)
 	{
-	  int width = glyph_width (gb->glyph, Qnil, gb->findex, window);
+	  int width = glyph_width (gb->glyph, window);
 	  if (white_in_end + width <= dl->bounds.right_in)
 	    {
 	      white_in_cnt++;
 	      white_in_end += width;
 	if (NILP (gb->extent))
 	  abort ();	/* these should have been handled in add_glyph_rune */
 	if (extent_end_glyph_layout (XEXTENT (gb->extent)) == GL_INSIDE_MARGIN)
 	  {
-	    gb->width = glyph_width (gb->glyph, Qnil, gb->findex, window);
+	    gb->width = glyph_width (gb->glyph, window);
 	    used_in += gb->width;
 	    Dynarr_add (ib, *gb);
 	  }
 	elt++;
 	if (NILP (gb->extent))
 	  abort ();	/* these should have been handled in add_glyph_rune */
 	if (extent_end_glyph_layout (XEXTENT (gb->extent)) == GL_INSIDE_MARGIN)
 	  {
-	    int width = glyph_width (gb->glyph, Qnil, gb->findex, window);
+	    int width = glyph_width (gb->glyph, window);
 	    if (used_out)
 	      {
 		in_out_cnt++;
 		in_out_end += width;
 if (NILP (gb->extent))
 	abort ();	/* these should have been handled in add_glyph_rune */
 if (extent_end_glyph_layout (XEXTENT (gb->extent)) == GL_OUTSIDE_MARGIN)
 	{
-	  int width = glyph_width (gb->glyph, Qnil, gb->findex, window);
+	  int width = glyph_width (gb->glyph, window);
 	  if (out_start - width >= in_out_end)
 	    {
 	      out_cnt++;
 	      out_start -= width;
 /*									   */
 /*                            modeline routines                            */
 /*									   */
 /***************************************************************************/
-/* Ensure that the given display line DL accurately represents the
+/* This function is also used in frame.c by `generate_title_string' */
-modeline for the given window. */
+void
-static void
-generate_modeline (struct window *w, struct display_line *dl, int type)
-{
-struct buffer *b = XBUFFER (w->buffer);
-struct frame *f = XFRAME (w->frame);
-struct device *d = XDEVICE (f->device);
-/* Unlike display line and rune pointers, this one can't change underneath
-our feet. */
-struct display_block *db = get_display_block_from_line (dl, TEXT);
-int max_pixpos, min_pixpos, ypos_adj;
-Lisp_Object font_inst;
-/* This will actually determine incorrect inside boundaries for the
-modeline since it ignores the margins.  However being aware of this fact
-we never use those values anywhere so it doesn't matter. */
-dl->bounds = calculate_display_line_boundaries (w, 1);
-/* We are generating a modeline. */
-dl->modeline = 1;
-dl->cursor_elt = -1;
-/* Reset the runes on the modeline. */
-Dynarr_reset (db->runes);
-if (!WINDOW_HAS_MODELINE_P (w))
-{
-struct rune rb;
-/* If there is a horizontal scrollbar, don't add anything. */
-if (window_scrollbar_height (w))
-	return;
-dl->ascent = DEVMETH (d, divider_height, ());
-dl->descent = 0;
-/* The modeline is at the bottom of the gutters. */
-dl->ypos = WINDOW_BOTTOM (w);
-rb.findex = MODELINE_INDEX;
-rb.xpos = dl->bounds.left_out;
-rb.width = dl->bounds.right_out - dl->bounds.left_out;
-rb.bufpos = 0;
-rb.endpos = 0;
-rb.type = RUNE_HLINE;
-rb.object.hline.thickness = 1;
-rb.object.hline.yoffset = 0;
-rb.cursor_type = NO_CURSOR;
-if (!EQ (Qzero, w->modeline_shadow_thickness)
-	  && FRAME_WIN_P (f))
-	{
-	  int shadow_thickness = MODELINE_SHADOW_THICKNESS (w);
-	  dl->ypos -= shadow_thickness;
-	  rb.xpos += shadow_thickness;
-	  rb.width -= 2 * shadow_thickness;
-	}
-Dynarr_add (db->runes, rb);
-return;
-}
-/* !!#### not right; needs to compute the max height of
-all the charsets */
-font_inst = WINDOW_FACE_CACHEL_FONT (w, MODELINE_INDEX, Vcharset_ascii);
-dl->ascent = XFONT_INSTANCE (font_inst)->ascent;
-dl->descent = XFONT_INSTANCE (font_inst)->descent;
-min_pixpos = dl->bounds.left_out;
-max_pixpos = dl->bounds.right_out;
-if (!EQ (Qzero, w->modeline_shadow_thickness) && FRAME_WIN_P (f))
-{
-int shadow_thickness = MODELINE_SHADOW_THICKNESS (w);
-ypos_adj = shadow_thickness;
-min_pixpos += shadow_thickness;
-max_pixpos -= shadow_thickness;
-}
-else
-ypos_adj = 0;
-generate_formatted_string_db (b->modeline_format,
-				b->generated_modeline_string, w, dl, db,
-				MODELINE_INDEX, min_pixpos, max_pixpos, type);
-/* The modeline is at the bottom of the gutters.  We have to wait to
-set this until we've generated the modeline in order to account
-for any embedded faces. */
-dl->ypos = WINDOW_BOTTOM (w) - dl->descent - ypos_adj;
-}
-static void
 generate_formatted_string_db (Lisp_Object format_str, Lisp_Object result_str,
 struct window *w, struct display_line *dl,
 struct display_block *db, face_index findex,
 int min_pixpos, int max_pixpos, int type)
 {
 struct frame *f = XFRAME (w->frame);
 struct device *d = XDEVICE (f->device);
 pos_data data;
 int c_pixpos;
+Charcount offset = 0;
 xzero (data);
 data.d = d;
 data.db = db;
 data.dl = dl;
 data.cursor_type = NO_CURSOR;
 data.last_charset = Qunbound;
 data.last_findex = DEFAULT_INDEX;
 data.result_str = result_str;
 data.is_modeline = 1;
+data.string = Qnil;
 XSETWINDOW (data.window, w);
 Dynarr_reset (formatted_string_extent_dynarr);
 Dynarr_reset (formatted_string_extent_start_dynarr);
 Dynarr_reset (formatted_string_extent_end_dynarr);
-/* This recursively builds up the modeline. */
+/* result_str is nil when we're building a frame or icon title. Otherwise,
+we're building a modeline, so the offset starts at the modeline
+horizontal scrolling ammount */
+if (! NILP (result_str))
+offset = w->modeline_hscroll;
 generate_fstring_runes (w, &data, 0, 0, -1, format_str, 0,
-max_pixpos - min_pixpos, findex, type);
+max_pixpos - min_pixpos, findex, type, &offset,
+			  Qnil);
 if (Dynarr_length (db->runes))
 {
 struct rune *rb =
 Dynarr_atp (db->runes, Dynarr_length (db->runes) - 1);
 result_str);
 }
 }
 }
+/* Ensure that the given display line DL accurately represents the
+modeline for the given window. */
+static void
+generate_modeline (struct window *w, struct display_line *dl, int type)
+{
+struct buffer *b = XBUFFER (w->buffer);
+struct frame *f = XFRAME (w->frame);
+struct device *d = XDEVICE (f->device);
+/* Unlike display line and rune pointers, this one can't change underneath
+our feet. */
+struct display_block *db = get_display_block_from_line (dl, TEXT);
+int max_pixpos, min_pixpos, ypos_adj;
+Lisp_Object font_inst;
+/* This will actually determine incorrect inside boundaries for the
+modeline since it ignores the margins.  However being aware of this fact
+we never use those values anywhere so it doesn't matter. */
+dl->bounds = calculate_display_line_boundaries (w, 1);
+/* We are generating a modeline. */
+dl->modeline = 1;
+dl->cursor_elt = -1;
+/* Reset the runes on the modeline. */
+Dynarr_reset (db->runes);
+if (!WINDOW_HAS_MODELINE_P (w))
+{
+struct rune rb;
+/* If there is a horizontal scrollbar, don't add anything. */
+if (window_scrollbar_height (w))
+	return;
+dl->ascent = DEVMETH (d, divider_height, ());
+dl->descent = 0;
+/* The modeline is at the bottom of the gutters. */
+dl->ypos = WINDOW_BOTTOM (w);
+/* adjust for the bottom gutter */
+if (window_is_lowest (w))
+	dl->ypos -= FRAME_BOTTOM_GUTTER_BOUNDS (f);
+rb.findex = MODELINE_INDEX;
+rb.xpos = dl->bounds.left_out;
+rb.width = dl->bounds.right_out - dl->bounds.left_out;
+rb.bufpos = 0;
+rb.endpos = 0;
+rb.type = RUNE_HLINE;
+rb.object.hline.thickness = 1;
+rb.object.hline.yoffset = 0;
+rb.cursor_type = NO_CURSOR;
+if (!EQ (Qzero, w->modeline_shadow_thickness)
+	  && FRAME_WIN_P (f))
+	{
+	  int shadow_thickness = MODELINE_SHADOW_THICKNESS (w);
+	  dl->ypos -= shadow_thickness;
+	  rb.xpos += shadow_thickness;
+	  rb.width -= 2 * shadow_thickness;
+	}
+Dynarr_add (db->runes, rb);
+return;
+}
+/* !!#### not right; needs to compute the max height of
+all the charsets */
+font_inst = WINDOW_FACE_CACHEL_FONT (w, MODELINE_INDEX, Vcharset_ascii);
+dl->ascent = XFONT_INSTANCE (font_inst)->ascent;
+dl->descent = XFONT_INSTANCE (font_inst)->descent;
+min_pixpos = dl->bounds.left_out;
+max_pixpos = dl->bounds.right_out;
+if (!EQ (Qzero, w->modeline_shadow_thickness) && FRAME_WIN_P (f))
+{
+int shadow_thickness = MODELINE_SHADOW_THICKNESS (w);
+ypos_adj = shadow_thickness;
+min_pixpos += shadow_thickness;
+max_pixpos -= shadow_thickness;
+}
+else
+ypos_adj = 0;
+generate_formatted_string_db (b->modeline_format,
+				b->generated_modeline_string, w, dl, db,
+				MODELINE_INDEX, min_pixpos, max_pixpos, type);
+/* The modeline is at the bottom of the gutters.  We have to wait to
+set this until we've generated the modeline in order to account
+for any embedded faces. */
+dl->ypos = WINDOW_BOTTOM (w) - dl->descent - ypos_adj;
+/* adjust for the bottom gutter */
+if (window_is_lowest (w))
+dl->ypos -= FRAME_BOTTOM_GUTTER_BOUNDS (f);
+}
 static Charcount
-add_string_to_fstring_db_runes (pos_data *data, CONST Bufbyte *str,
+add_string_to_fstring_db_runes (pos_data *data, const Bufbyte *str,
 Charcount pos, Charcount min_pos, Charcount max_pos)
 {
 /* This function has been Mule-ized. */
 Charcount end;
-CONST Bufbyte *cur_pos = str;
+const Bufbyte *cur_pos = str;
 struct display_block *db = data->db;
 data->blank_width = space_width (XWINDOW (data->window));
 while (Dynarr_length (db->runes) < pos)
 add_blank_rune (data, NULL, 0);
 end = (Dynarr_length (db->runes) +
-bytecount_to_charcount (str, strlen ((CONST char *) str)));
+bytecount_to_charcount (str, strlen ((const char *) str)));
 if (max_pos != -1)
 end = min (max_pos, end);
 while (pos < end && *cur_pos)
 {
-CONST Bufbyte *old_cur_pos = cur_pos;
+const Bufbyte *old_cur_pos = cur_pos;
 int succeeded;
 data->ch = charptr_emchar (cur_pos);
 succeeded = (add_emchar_rune (data) != ADD_FAILED);
 INC_CHARPTR (cur_pos);
 /* #### Urk!  Should also handle begin-glyphs and end-glyphs in
 modeline extents. */
 static Charcount
 add_glyph_to_fstring_db_runes (pos_data *data, Lisp_Object glyph,
-Charcount pos, Charcount min_pos, Charcount max_pos)
+Charcount pos, Charcount min_pos,
+			       Charcount max_pos, Lisp_Object extent)
 {
 /* This function has been Mule-ized. */
 Charcount end;
 struct display_block *db = data->db;
 struct glyph_block gb;
 end = Dynarr_length (db->runes) + 1;
 if (max_pos != -1)
 end = min (max_pos, end);
 gb.glyph = glyph;
-gb.extent = Qnil;
+gb.extent = extent;
 add_glyph_rune (data, &gb, BEGIN_GLYPHS, 0, 0);
 pos++;
 while (Dynarr_length (db->runes) < pos &&
 (data->pixpos + data->blank_width <= data->max_pixpos))
 modeline. */
 static Charcount
 generate_fstring_runes (struct window *w, pos_data *data, Charcount pos,
 Charcount min_pos, Charcount max_pos,
 Lisp_Object elt, int depth, int max_pixsize,
-face_index findex, int type)
+face_index findex, int type, Charcount *offset,
+			Lisp_Object cur_ext)
 {
 /* This function has been Mule-ized. */
 /* #### The other losing things in this function are:
 -- C zero-terminated-string lossage.
 while (*this && *this != '%')
 this++;
 if (this != last)
 {
-/* The string is just a string. */
+/* No %-construct */
 Charcount size =
-bytecount_to_charcount (last, this - last) + pos;
+		bytecount_to_charcount (last, this - last);
-Charcount tmp_max = (max_pos == -1 ? size : min (size, max_pos));
+	      if (size <= *offset)
-pos = add_string_to_fstring_db_runes (data, last, pos, pos,
+		*offset -= size;
-tmp_max);
+	      else
+		{
+		  Charcount tmp_max = (max_pos == -1 ? pos + size - *offset :
+				       min (pos + size - *offset, max_pos));
+		  const Bufbyte *tmp_last = charptr_n_addr (last, *offset);
+		  pos = add_string_to_fstring_db_runes (data, tmp_last,
+							pos, pos, tmp_max);
+		  *offset = 0;
+		}
 }
 else /* *this == '%' */
 {
 Charcount spec_width = 0;
 if (*this == 'M')
 {
 pos = generate_fstring_runes (w, data, pos, spec_width,
 max_pos, Vglobal_mode_string,
 depth, max_pixsize, findex,
-type);
+type, offset, cur_ext);
 }
 else if (*this == '-')
 {
 Charcount num_to_add;
 num_to_add++;
 }
 while (num_to_add--)
 pos = add_string_to_fstring_db_runes
-(data, (CONST Bufbyte *) "-", pos, pos, max_pos);
+(data, (const Bufbyte *) "-", pos, pos, max_pos);
 }
 else if (*this != 0)
 {
+Emchar ch = charptr_emchar (this);
 Bufbyte *str;
-Emchar ch = charptr_emchar (this);
+		  Charcount size;
 decode_mode_spec (w, ch, type);
 str = Dynarr_atp (mode_spec_bufbyte_string, 0);
-pos = add_string_to_fstring_db_runes (data,str, pos, pos,
+		  size = bytecount_to_charcount
-max_pos);
+		    /* Skip the null character added by `decode_mode_spec' */
+		    (str, Dynarr_length (mode_spec_bufbyte_string)) - 1;
+		  if (size <= *offset)
+		    *offset -= size;
+		  else
+		    {
+		      const Bufbyte *tmp_str = charptr_n_addr (str, *offset);
+		      /* #### NOTE: I don't understand why a tmp_max is not
+			 computed and used here as in the plain string case
+			 above. -- dv */
+		      pos = add_string_to_fstring_db_runes (data, tmp_str,
+							    pos, pos,
+							    max_pos);
+		      *offset = 0;
+		    }
 }
 /* NOT this++.  There could be any sort of character at
 the current position. */
 INC_CHARPTR (this);
 as if it appeared here directly. */
 Lisp_Object tem = symbol_value_in_buffer (elt, w->buffer);
 if (!UNBOUNDP (tem))
 {
-/* If value is a string, output that string literally:
+	  /* If value is a string, output that string literally:
 don't check for % within it.  */
 if (STRINGP (tem))
 {
-pos =
+	      Bufbyte *str = XSTRING_DATA (tem);
-add_string_to_fstring_db_runes
+	      Charcount size = XSTRING_CHAR_LENGTH (tem);
-(data, XSTRING_DATA (tem), pos, min_pos, max_pos);
+	      if (size <= *offset)
+		*offset -= size;
+	      else
+		{
+		  const Bufbyte *tmp_str = charptr_n_addr (str, *offset);
+		  /* #### NOTE: I don't understand why a tmp_max is not
+		     computed and used here as in the plain string case
+		     above. -- dv */
+		  pos = add_string_to_fstring_db_runes (data, tmp_str, pos,
+							min_pos, max_pos);
+		  *offset = 0;
+		}
 }
 /* Give up right away for nil or t.  */
 else if (!EQ (tem, elt))
 {
 elt = tem;
 	}
 }
 else if (CONSP (elt))
 {
 /* A cons cell: four distinct cases.
-* If first element is a string or a cons, process all the elements
+* - If first element is a string or a cons, process all the elements
-* and effectively concatenate them.
+*   and effectively concatenate them.
-* If first element is a negative number, truncate displaying cdr to
+* - If first element is a negative number, truncate displaying cdr to
-* at most that many characters.  If positive, pad (with spaces)
+*   at most that many characters.  If positive, pad (with spaces)
-* to at least that many characters.
+*   to at least that many characters.
-* If first element is a symbol, process the cadr or caddr recursively
+* - If first element is another symbol, process the cadr or caddr
-* according to whether the symbol's value is non-nil or nil.
+*   recursively according to whether the symbol's value is non-nil or
-* If first element is a face, process the cdr recursively
+*   nil.
-* without altering the depth.
+* - If first element is a face, process the cdr recursively
+*   without altering the depth.
 */
 Lisp_Object car, tem;
 car = XCAR (elt);
 if (SYMBOLP (car))
-{
+	{
-elt = XCDR (elt);
+	  elt = XCDR (elt);
-if (!CONSP (elt))
+	  if (!CONSP (elt))
-goto invalid;
+	    goto invalid;
-tem = symbol_value_in_buffer (car, w->buffer);
-/* elt is now the cdr, and we know it is a cons cell.
+	  tem = symbol_value_in_buffer (car, w->buffer);
-Use its car if CAR has a non-nil value.  */
+	  /* elt is now the cdr, and we know it is a cons cell.
-if (!UNBOUNDP (tem))
+	     Use its car if CAR has a non-nil value.  */
-{
+	  if (!UNBOUNDP (tem))
-if (!NILP (tem))
+	    {
-{
+	      if (!NILP (tem))
-elt = XCAR (elt);
+		{
-goto tail_recurse;
+		  elt = XCAR (elt);
-}
+		  goto tail_recurse;
-}
+		}
-/* Symbol's value is nil (or symbol is unbound)
+	    }
-* Get the cddr of the original list
+	  /* Symbol's value is nil (or symbol is unbound)
-* and if possible find the caddr and use that.
+	   * Get the cddr of the original list
-*/
+	   * and if possible find the caddr and use that.
-elt = XCDR (elt);
+	   */
-if (NILP (elt))
+	  elt = XCDR (elt);
-;
+	  if (NILP (elt))
-else if (!CONSP (elt))
+	    ;
-goto invalid;
+	  else if (!CONSP (elt))
-else
+	    goto invalid;
-{
+	  else
-elt = XCAR (elt);
+	    {
-goto tail_recurse;
+	      elt = XCAR (elt);
-}
+	      goto tail_recurse;
-}
+	    }
+	}
 else if (INTP (car))
 {
 Charcount lim = XINT (car);
 elt = XCDR (elt);
 goto tail_recurse;
 }
 else if (STRINGP (car) || CONSP (car))
 {
 int limit = 50;
 /* LIMIT is to protect against circular lists.  */
 while (CONSP (elt) && --limit > 0
 && (pos < max_pos || max_pos == -1))
 {
 pos = generate_fstring_runes (w, data, pos, pos, max_pos,
-XCAR (elt), depth,
+XCAR (elt), depth, max_pixsize,
-max_pixsize, findex, type);
+					    findex, type, offset, cur_ext);
 elt = XCDR (elt);
 }
 }
 else if (EXTENTP (car))
 {
 new_findex = old_findex;
 data->findex = new_findex;
 pos = generate_fstring_runes (w, data, pos, pos, max_pos,
 XCDR (elt), depth - 1,
-max_pixsize, new_findex, type);
+					    max_pixsize, new_findex, type,
+					    offset, car);
 data->findex = old_findex;
 Dynarr_add (formatted_string_extent_dynarr, ext);
 Dynarr_add (formatted_string_extent_start_dynarr, start);
 Dynarr_add (formatted_string_extent_end_dynarr, data->bytepos);
 }
 }
 }
 else if (GLYPHP (elt))
 {
-pos = add_glyph_to_fstring_db_runes (data, elt, pos, pos, max_pos);
+/* Glyphs are considered as one character with respect to the modeline
+	 horizontal scrolling facility. -- dv */
+if (*offset > 0)
+	*offset -= 1;
+else
+	pos = add_glyph_to_fstring_db_runes (data, elt, pos, pos, max_pos,
+					     cur_ext);
 }
 else
 {
 invalid:
-pos =
+{
-add_string_to_fstring_db_runes
+	char *str = GETTEXT ("*invalid*");
-(data, (CONST Bufbyte *) GETTEXT ("*invalid*"), pos, min_pos,
+	Charcount size = (Charcount) strlen (str); /* is this ok ?? -- dv */
-max_pos);
+	if (size <= *offset)
+	  *offset -= size;
+	else
+	  {
+	    const Bufbyte *tmp_str =
+	      charptr_n_addr ((const Bufbyte *) str, *offset);
+	    /* #### NOTE: I don't understand why a tmp_max is not computed and
+	       used here as in the plain string case above. -- dv */
+	    pos = add_string_to_fstring_db_runes (data, tmp_str, pos,
+						  min_pos, max_pos);
+	    *offset = 0;
+	  }
+}
 }
 if (min_pos > pos)
 {
-add_string_to_fstring_db_runes (data, (CONST Bufbyte *) "", pos, min_pos,
+add_string_to_fstring_db_runes (data, (const Bufbyte *) "", pos,
--1);
+				      min_pos, -1);
 }
 return pos;
-}
-/* The caller is responsible for freeing the returned string. */
-Bufbyte *
-generate_formatted_string (struct window *w, Lisp_Object format_str,
-			   Lisp_Object result_str, face_index findex, int type)
-{
-struct display_line *dl;
-struct display_block *db;
-int elt = 0;
-dl = &formatted_string_display_line;
-db = get_display_block_from_line (dl, TEXT);
-Dynarr_reset (db->runes);
-generate_formatted_string_db (format_str, result_str, w, dl, db, findex, 0,
--1, type);
-Dynarr_reset (formatted_string_emchar_dynarr);
-while (elt < Dynarr_length (db->runes))
-{
-if (Dynarr_atp (db->runes, elt)->type == RUNE_CHAR)
-	Dynarr_add (formatted_string_emchar_dynarr,
-		    Dynarr_atp (db->runes, elt)->object.chr.ch);
-elt++;
-}
-return
-convert_emchar_string_into_malloced_string
-( Dynarr_atp (formatted_string_emchar_dynarr, 0),
-Dynarr_length (formatted_string_emchar_dynarr), 0);
 }
 /* Update just the modeline.  Assumes the desired display structs.  If
 they do not have a modeline block, it does nothing. */
 static void
 return 0;
 }
 /***************************************************************************/
+/*								*/
+/*                            displayable string routines			*/
+/*								*/
+/***************************************************************************/
+/* Given a position for a string in a window, ensure that the given
+display line DL accurately represents the text on a line starting
+at the given position.
+Yes, this is duplicating the code of create_text_block, but it
+looked just too hard to change create_text_block to handle strings
+*and* buffers. We already make a distinction between the two
+elsewhere in the code so I think unifying them would require a
+complete MULE rewrite. Besides, the other distinction is that these
+functions cover text that the user *cannot edit* so we can remove
+everything to do with cursors, minibuffers etc. Eventually the
+modeline routines should be modified to use this code as it copes
+with many more types of display situation. */
+static Bufpos
+create_string_text_block (struct window *w, Lisp_Object disp_string,
+			  struct display_line *dl,
+			  Bufpos start_pos,
+			  prop_block_dynarr **prop,
+			  face_index default_face)
+{
+struct frame *f = XFRAME (w->frame);
+/* Note that a lot of the buffer controlled stuff has been left in
+because you might well want to make use of it (selective display
+etc), its just the buffer text that we do not use. However, it
+seems to be possible for buffer to be nil sometimes so protect
+against this case. */
+struct buffer *b = BUFFERP (w->buffer) ? XBUFFER (w->buffer) : 0;
+struct device *d = XDEVICE (f->device);
+Lisp_String* s = XSTRING (disp_string);
+/* we're working with these a lot so precalculate them */
+Bytecount slen = XSTRING_LENGTH (disp_string);
+Bytecount bi_string_zv = slen;
+Bytind bi_start_pos = charcount_to_bytecount (string_data (s), start_pos);
+pos_data data;
+int truncate_win = b ? window_truncation_on (w) : 0;
+int end_glyph_width = 0;
+/* we're going to ditch selective display for static text, its an
+FSF thing and invisble extents are the way to go
+here. Implementing it also relies on a number of buffer-specific
+functions that we don't have the luxury of being able to use
+here. */
+/* The variable ctl-arrow allows the user to specify what characters
+can actually be displayed and which octal should be used for.
+#### This variable should probably have some rethought done to
+it.
+#### It would also be really nice if you could specify that
+the characters come out in hex instead of in octal.  Mule
+does that by adding a ctl-hexa variable similar to ctl-arrow,
+but that's bogus -- we need a more general solution.  I
+think you need to extend the concept of display tables
+into a more general conversion mechanism.  Ideally you
+could specify a Lisp function that converts characters,
+but this violates the Second Golden Rule and besides would
+make things way way way way slow.
+So instead, we extend the display-table concept, which was
+historically limited to 256-byte vectors, to one of the
+following:
+a) A 256-entry vector, for backward compatibility;
+b) char-table, mapping characters to values;
+c) range-table, mapping ranges of characters to values;
+d) a list of the above.
+The (d) option allows you to specify multiple display tables
+instead of just one.  Each display table can specify conversions
+for some characters and leave others unchanged.  The way the
+character gets displayed is determined by the first display table
+with a binding for that character.  This way, you could call a
+function `enable-hex-display' that adds a hex display-table to
+the list of display tables for the current buffer.
+#### ...not yet implemented...  Also, we extend the concept of
+"mapping" to include a printf-like spec.  Thus you can make all
+extended characters show up as hex with a display table like
+this:
+#s(range-table data ((256 524288) (format "%x")))
+Since more than one display table is possible, you have
+great flexibility in mapping ranges of characters.  */
+Emchar printable_min = b ? (CHAR_OR_CHAR_INTP (b->ctl_arrow)
+			  ? XCHAR_OR_CHAR_INT (b->ctl_arrow)
+			  : ((EQ (b->ctl_arrow, Qt) || EQ (b->ctl_arrow, Qnil))
+			     ? 255 : 160)) : 255;
+Lisp_Object face_dt, window_dt;
+/* The text display block for this display line. */
+struct display_block *db = get_display_block_from_line (dl, TEXT);
+/* The first time through the main loop we need to force the glyph
+data to be updated. */
+int initial = 1;
+/* Apparently the new extent_fragment_update returns an end position
+equal to the position passed in if there are no more runs to be
+displayed. */
+int no_more_frags = 0;
+dl->used_prop_data = 0;
+dl->num_chars = 0;
+/* set up faces to use for clearing areas, used by
+output_display_line */
+dl->default_findex = default_face;
+if (default_face)
+{
+dl->left_margin_findex = default_face;
+dl->right_margin_findex = default_face;
+}
+else
+{
+dl->left_margin_findex =
+	get_builtin_face_cache_index (w, Vleft_margin_face);
+dl->right_margin_findex =
+	get_builtin_face_cache_index (w, Vright_margin_face);
+}
+xzero (data);
+data.ef = extent_fragment_new (disp_string, f);
+/* These values are used by all of the rune addition routines.  We add
+them to this structure for ease of passing. */
+data.d = d;
+XSETWINDOW (data.window, w);
+data.db = db;
+data.dl = dl;
+data.bi_bufpos = bi_start_pos;
+data.pixpos = dl->bounds.left_in;
+data.last_charset = Qunbound;
+data.last_findex = default_face;
+data.result_str = Qnil;
+data.string = disp_string;
+/* Set the right boundary adjusting it to take into account any end
+glyph.  Save the width of the end glyph for later use. */
+data.max_pixpos = dl->bounds.right_in;
+#if 0
+if (truncate_win)
+end_glyph_width = GLYPH_CACHEL_WIDTH (w, TRUN_GLYPH_INDEX);
+else
+end_glyph_width = GLYPH_CACHEL_WIDTH (w, CONT_GLYPH_INDEX);
+#endif
+data.max_pixpos -= end_glyph_width;
+data.cursor_type = NO_CURSOR;
+data.cursor_x = -1;
+data.start_col = 0;
+/* I don't think we want this, string areas should not scroll with
+the window
+data.start_col = w->hscroll;
+data.bi_start_col_enabled = (w->hscroll ? bi_start_pos : 0);
+*/
+data.bi_start_col_enabled = 0;
+data.hscroll_glyph_width_adjust = 0;
+/* We regenerate the line from the very beginning. */
+Dynarr_reset (db->runes);
+/* Why is this less than or equal and not just less than?  If the
+starting position is already equal to the maximum we can't add
+anything else, right?  Wrong.  We might still have a newline to
+add.  A newline can use the room allocated for an end glyph since
+if we add it we know we aren't going to be adding any end
+glyph. */
+/* #### Chuck -- I think this condition should be while (1).
+Otherwise if (e.g.) there is one begin-glyph and one end-glyph
+and the begin-glyph ends exactly at the end of the window, the
+end-glyph and text might not be displayed.  while (1) ensures
+that the loop terminates only when either (a) there is
+propagation data or (b) the end-of-line or end-of-buffer is hit.
+#### Also I think you need to ensure that the operation
+"add begin glyphs; add end glyphs; add text" is atomic and
+can't get interrupted in the middle.  If you run off the end
+of the line during that operation, then you keep accumulating
+propagation data until you're done.  Otherwise, if the (e.g.)
+there's a begin glyph at a particular position and attempting
+to display that glyph results in window-end being hit and
+propagation data being generated, then the character at that
+position won't be displayed.
+#### See also the comment after the end of this loop, below.
+*/
+while (data.pixpos <= data.max_pixpos)
+{
+/* #### This check probably should not be necessary. */
+if (data.bi_bufpos > bi_string_zv)
+	{
+	  /* #### urk!  More of this lossage! */
+	  data.bi_bufpos--;
+	  goto done;
+	}
+/* Check for face changes. */
+if (initial || (!no_more_frags && data.bi_bufpos == data.ef->end))
+	{
+	  /* Now compute the face and begin/end-glyph information. */
+	  data.findex =
+	    /* Remember that the extent-fragment routines deal in Bytind's. */
+	    extent_fragment_update (w, data.ef, data.bi_bufpos);
+	  /* This is somewhat cheesy but the alternative is to
+propagate default_face into extent_fragment_update. */
+	  if (data.findex == DEFAULT_INDEX)
+	    data.findex = default_face;
+	  get_display_tables (w, data.findex, &face_dt, &window_dt);
+	  if (data.bi_bufpos == data.ef->end)
+	    no_more_frags = 1;
+	}
+initial = 0;
+/* Determine what is next to be displayed.  We first handle any
+glyphs returned by glyphs_at_bufpos.  If there are no glyphs to
+display then we determine what to do based on the character at the
+current buffer position. */
+/* If the current position is covered by an invisible extent, do
+nothing (except maybe add some ellipses).
+	 #### The behavior of begin and end-glyphs at the edge of an
+	 invisible extent should be investigated further.  This is
+	 fairly low priority though. */
+if (data.ef->invisible)
+	{
+	  /* #### Chuck, perhaps you could look at this code?  I don't
+	     really know what I'm doing. */
+	  if (*prop)
+	    {
+	      Dynarr_free (*prop);
+	      *prop = 0;
+	    }
+	  /* The extent fragment code only sets this when we should
+	     really display the ellipses.  It makes sure the ellipses
+	     don't get displayed more than once in a row. */
+	  if (data.ef->invisible_ellipses)
+	    {
+	      struct glyph_block gb;
+	      data.ef->invisible_ellipses_already_displayed = 1;
+	      data.ef->invisible_ellipses = 0;
+	      gb.extent = Qnil;
+	      gb.glyph = Vinvisible_text_glyph;
+	      *prop = add_glyph_rune (&data, &gb, BEGIN_GLYPHS, 0,
+				      GLYPH_CACHEL (w, INVIS_GLYPH_INDEX));
+	      /* Perhaps they shouldn't propagate if the very next thing
+		 is to display a newline (for compatibility with
+		 selective-display-ellipses)?  Maybe that's too
+		 abstruse. */
+	      if (*prop)
+		goto done;
+	    }
+	  /* #### What if we we're dealing with a display table? */
+	  if (data.start_col)
+	    data.start_col--;
+	  if (data.bi_bufpos == bi_string_zv)
+	    goto done;
+	  else
+	    INC_CHARBYTIND (string_data (s), data.bi_bufpos);
+	}
+/* If there is propagation data, then it represents the current
+buffer position being displayed.  Add them and advance the
+position counter.  This might also add the minibuffer
+prompt. */
+else if (*prop)
+	{
+	  dl->used_prop_data = 1;
+	  *prop = add_propagation_runes (prop, &data);
+	  if (*prop)
+	    goto done;	/* gee, a really narrow window */
+	  else if (data.bi_bufpos == bi_string_zv)
+	    goto done;
+	  else if (data.bi_bufpos < 0)
+	    /* #### urk urk urk! Aborts are not very fun! Fix this please! */
+	    data.bi_bufpos = 0;
+	  else
+	    INC_CHARBYTIND (string_data (s), data.bi_bufpos);
+	}
+/* If there are end glyphs, add them to the line.  These are
+	 the end glyphs for the previous run of text.  We add them
+	 here rather than doing them at the end of handling the
+	 previous run so that glyphs at the beginning and end of
+	 a line are handled correctly. */
+else if (Dynarr_length (data.ef->end_glyphs) > 0)
+	{
+	  *prop = add_glyph_runes (&data, END_GLYPHS);
+	  if (*prop)
+	    goto done;
+	}
+/* If there are begin glyphs, add them to the line. */
+else if (Dynarr_length (data.ef->begin_glyphs) > 0)
+	{
+	  *prop = add_glyph_runes (&data, BEGIN_GLYPHS);
+	  if (*prop)
+	    goto done;
+	}
+/* If at end-of-buffer, we've already processed begin and
+	 end-glyphs at this point and there's no text to process,
+	 so we're done. */
+else if (data.bi_bufpos == bi_string_zv)
+	goto done;
+else
+	{
+	  Lisp_Object entry = Qnil;
+	  /* Get the character at the current buffer position. */
+	  data.ch = string_char (s, data.bi_bufpos);
+	  if (!NILP (face_dt) || !NILP (window_dt))
+	    entry = display_table_entry (data.ch, face_dt, window_dt);
+	  /* If there is a display table entry for it, hand it off to
+add_disp_table_entry_runes and let it worry about it. */
+	  if (!NILP (entry) && !EQ (entry, make_char (data.ch)))
+	    {
+	      *prop = add_disp_table_entry_runes (&data, entry);
+	      if (*prop)
+		goto done;
+	    }
+	  /* Check if we have hit a newline character.  If so, add a marker
+to the line and end this loop. */
+	  else if (data.ch == '\n')
+	    {
+	      /* We aren't going to be adding an end glyph so give its
+space back in order to make sure that the cursor can
+fit. */
+	      data.max_pixpos += end_glyph_width;
+	      goto done;
+	    }
+	  /* If the current character is considered to be printable, then
+just add it. */
+	  else if (data.ch >= printable_min)
+	    {
+	      *prop = add_emchar_rune (&data);
+	      if (*prop)
+		goto done;
+	    }
+	  /* If the current character is a tab, determine the next tab
+starting position and add a blank rune which extends from the
+current pixel position to that starting position. */
+	  else if (data.ch == '\t')
+	    {
+	      int tab_start_pixpos = data.pixpos;
+	      int next_tab_start;
+	      int char_tab_width;
+	      int prop_width = 0;
+	      if (data.start_col > 1)
+		tab_start_pixpos -= (space_width (w) * (data.start_col - 1));
+	      next_tab_start =
+		next_tab_position (w, tab_start_pixpos,
+				   dl->bounds.left_in +
+				   data.hscroll_glyph_width_adjust);
+	      if (next_tab_start > data.max_pixpos)
+		{
+		  prop_width = next_tab_start - data.max_pixpos;
+		  next_tab_start = data.max_pixpos;
+		}
+	      data.blank_width = next_tab_start - data.pixpos;
+	      char_tab_width =
+		(next_tab_start - tab_start_pixpos) / space_width (w);
+	      *prop = add_blank_rune (&data, w, char_tab_width);
+	      /* add_blank_rune is only supposed to be called with
+sizes guaranteed to fit in the available space. */
+	      assert (!(*prop));
+	      if (prop_width)
+		{
+		  struct prop_block pb;
+		  *prop = Dynarr_new (prop_block);
+		  pb.type = PROP_BLANK;
+		  pb.data.p_blank.width = prop_width;
+		  pb.data.p_blank.findex = data.findex;
+		  Dynarr_add (*prop, pb);
+		  goto done;
+		}
+	    }
+	  /* If character is a control character, pass it off to
+add_control_char_runes.
+	     The is_*() routines have undefined results on
+	     arguments outside of the range [-1, 255].  (This
+	     often bites people who carelessly use `char' instead
+	     of `unsigned char'.)
+	     */
+	  else if (data.ch < 0x100 && iscntrl ((Bufbyte) data.ch))
+	    {
+	      *prop = add_control_char_runes (&data, b);
+	      if (*prop)
+		goto done;
+	    }
+	  /* If the character is above the ASCII range and we have not
+already handled it, then print it as an octal number. */
+	  else if (data.ch >= 0200)
+	    {
+	      *prop = add_octal_runes (&data);
+	      if (*prop)
+		goto done;
+	    }
+	  /* Assume the current character is considered to be printable,
+then just add it. */
+	  else
+	    {
+	      *prop = add_emchar_rune (&data);
+	      if (*prop)
+		goto done;
+	    }
+	  INC_CHARBYTIND (string_data (s), data.bi_bufpos);
+	}
+}
+done:
+/* Determine the starting point of the next line if we did not hit the
+end of the buffer. */
+if (data.bi_bufpos < bi_string_zv)
+{
+/* #### This check is not correct.  If the line terminated
+	 due to a begin-glyph or end-glyph hitting window-end, then
+	 data.ch will not point to the character at data.bi_bufpos.  If
+	 you make the two changes mentioned at the top of this loop,
+	 you should be able to say '(if (*prop))'.  That should also
+	 make it possible to eliminate the data.bi_bufpos < BI_BUF_ZV (b)
+	 check. */
+/* The common case is that the line ended because we hit a newline.
+In that case, the next character is just the next buffer
+position. */
+if (data.ch == '\n')
+	{
+	  INC_CHARBYTIND (string_data (s), data.bi_bufpos);
+	}
+/* Otherwise we have a buffer line which cannot fit on one display
+line. */
+else
+	{
+	  struct glyph_block gb;
+	  struct glyph_cachel *cachel;
+	  /* If the line is to be truncated then we actually have to look
+for the next newline.  We also add the end-of-line glyph which
+we know will fit because we adjusted the right border before
+we starting laying out the line. */
+	  data.max_pixpos += end_glyph_width;
+	  data.findex = default_face;
+	  gb.extent = Qnil;
+	  if (truncate_win)
+	    {
+	      Bytind bi_pos;
+	      /* Now find the start of the next line. */
+	      bi_pos = bi_find_next_emchar_in_string (s, '\n', data.bi_bufpos, 1);
+	      data.cursor_type = NO_CURSOR;
+	      data.bi_bufpos = bi_pos;
+	      gb.glyph = Vtruncation_glyph;
+	      cachel = GLYPH_CACHEL (w, TRUN_GLYPH_INDEX);
+	    }
+	  else
+	    {
+	      /* The cursor can never be on the continuation glyph. */
+	      data.cursor_type = NO_CURSOR;
+	      /* data.bi_bufpos is already at the start of the next line. */
+	      gb.glyph = Vcontinuation_glyph;
+	      cachel = GLYPH_CACHEL (w, CONT_GLYPH_INDEX);
+	    }
+	  if (end_glyph_width)
+	    add_glyph_rune (&data, &gb, BEGIN_GLYPHS, 0, cachel);
+	  if (truncate_win && data.bi_bufpos == bi_string_zv)
+	    {
+	      const Bufbyte* endb = charptr_n_addr (string_data (s), bi_string_zv);
+	      DEC_CHARPTR (endb);
+	      if (charptr_emchar (endb) != '\n')
+		{
+		  /* #### Damn this losing shit. */
+		  data.bi_bufpos++;
+		}
+	    }
+	}
+}
+else if (data.bi_bufpos == bi_string_zv)
+{
+/* create_text_block () adds a bogus \n marker here which screws
+	 up subwindow display. Since we never have a cursor in the
+	 gutter we can safely ignore it. */
+}
+/* Calculate left whitespace boundary. */
+{
+int elt = 0;
+/* Whitespace past a newline is considered right whitespace. */
+while (elt < Dynarr_length (db->runes))
+{
+	struct rune *rb = Dynarr_atp (db->runes, elt);
+	if ((rb->type == RUNE_CHAR && rb->object.chr.ch == ' ')
+	    || rb->type == RUNE_BLANK)
+	  {
+	    dl->bounds.left_white += rb->width;
+	    elt++;
+	  }
+	else
+	  elt = Dynarr_length (db->runes);
+}
+}
+/* Calculate right whitespace boundary. */
+{
+int elt = Dynarr_length (db->runes) - 1;
+int done = 0;
+while (!done && elt >= 0)
+{
+	struct rune *rb = Dynarr_atp (db->runes, elt);
+	if (!(rb->type == RUNE_CHAR && rb->object.chr.ch < 0x100
+	    && isspace (rb->object.chr.ch))
+	    && !rb->type == RUNE_BLANK)
+	  {
+	    dl->bounds.right_white = rb->xpos + rb->width;
+	    done = 1;
+	  }
+	elt--;
+}
+/* The line is blank so everything is considered to be right
+whitespace. */
+if (!done)
+dl->bounds.right_white = dl->bounds.left_in;
+}
+/* Set the display blocks bounds. */
+db->start_pos = dl->bounds.left_in;
+if (Dynarr_length (db->runes))
+{
+struct rune *rb = Dynarr_atp (db->runes, Dynarr_length (db->runes) - 1);
+db->end_pos = rb->xpos + rb->width;
+}
+else
+db->end_pos = dl->bounds.right_white;
+/* update line height parameters */
+if (!data.new_ascent && !data.new_descent)
+{
+/* We've got a blank line so initialize these values from the default
+face. */
+default_face_font_info (data.window, &data.new_ascent,
+			      &data.new_descent, 0, 0, 0);
+}
+if (data.max_pixmap_height)
+{
+int height = data.new_ascent + data.new_descent;
+int pix_ascent, pix_descent;
+pix_descent = data.max_pixmap_height * data.new_descent / height;
+pix_ascent = data.max_pixmap_height - pix_descent;
+data.new_ascent = max (data.new_ascent, pix_ascent);
+data.new_descent = max (data.new_descent, pix_descent);
+}
+dl->ascent = data.new_ascent;
+dl->descent = data.new_descent;
+{
+unsigned short ascent = (unsigned short) XINT (w->minimum_line_ascent);
+if (dl->ascent < ascent)
+dl->ascent = ascent;
+}
+{
+unsigned short descent = (unsigned short) XINT (w->minimum_line_descent);
+if (dl->descent < descent)
+dl->descent = descent;
+}
+dl->cursor_elt = data.cursor_x;
+/* #### lossage lossage lossage! Fix this shit! */
+if (data.bi_bufpos > bi_string_zv)
+dl->end_bufpos = buffer_or_string_bytind_to_bufpos (disp_string, bi_string_zv);
+else
+dl->end_bufpos = buffer_or_string_bytind_to_bufpos (disp_string, data.bi_bufpos) - 1;
+if (truncate_win)
+data.dl->num_chars =
+string_column_at_point (s, dl->end_bufpos, b ? XINT (b->tab_width) : 8);
+else
+/* This doesn't correctly take into account tabs and control
+characters but if the window isn't being truncated then this
+value isn't going to end up being used anyhow. */
+data.dl->num_chars = dl->end_bufpos - dl->bufpos;
+/* #### handle horizontally scrolled line with text none of which
+was actually laid out. */
+/* #### handle any remainder of overlay arrow */
+if (*prop == ADD_FAILED)
+*prop = NULL;
+if (truncate_win && *prop)
+{
+Dynarr_free (*prop);
+*prop = NULL;
+}
+extent_fragment_delete (data.ef);
+/* #### If we started at EOB, then make sure we return a value past
+it so that regenerate_window will exit properly.  This is bogus.
+The main loop should get fixed so that it isn't necessary to call
+this function if we are already at EOB. */
+if (data.bi_bufpos == bi_string_zv && bi_start_pos == bi_string_zv)
+return bytecount_to_charcount (string_data (s), data.bi_bufpos) + 1; /* Yuck! */
+else
+return bytecount_to_charcount (string_data (s), data.bi_bufpos);
+}
+/* Given a display line and a starting position, ensure that the
+contents of the display line accurately represent the visual
+representation of the buffer contents starting from the given
+position when displayed in the given window.  The display line ends
+when the contents of the line reach the right boundary of the given
+window.
+This is very similar to generate_display_line but with the same
+limitations as create_string_text_block. I have taken the liberty
+of fixing the bytind stuff though.*/
+static Bufpos
+generate_string_display_line (struct window *w, Lisp_Object disp_string,
+			      struct display_line *dl,
+			      Bufpos start_pos,
+			      prop_block_dynarr **prop,
+			      face_index default_face)
+{
+Bufpos ret_bufpos;
+/* you must set bounds before calling this. */
+/* Reset what this line is using. */
+if (dl->display_blocks)
+Dynarr_reset (dl->display_blocks);
+if (dl->left_glyphs)
+{
+Dynarr_free (dl->left_glyphs);
+dl->left_glyphs = 0;
+}
+if (dl->right_glyphs)
+{
+Dynarr_free (dl->right_glyphs);
+dl->right_glyphs = 0;
+}
+/* We aren't generating a modeline at the moment. */
+dl->modeline = 0;
+/* Create a display block for the text region of the line. */
+ret_bufpos = create_string_text_block (w, disp_string, dl, start_pos,
+					 prop, default_face);
+dl->bufpos = start_pos;
+if (dl->end_bufpos < dl->bufpos)
+dl->end_bufpos = dl->bufpos;
+/* If there are left glyphs associated with any character in the
+text block, then create a display block to handle them. */
+if (dl->left_glyphs != NULL && Dynarr_length (dl->left_glyphs))
+create_left_glyph_block (w, dl, 0);
+/* If there are right glyphs associated with any character in the
+text block, then create a display block to handle them. */
+if (dl->right_glyphs != NULL && Dynarr_length (dl->right_glyphs))
+create_right_glyph_block (w, dl);
+return ret_bufpos;
+}
+/* This is ripped off from regenerate_window. All we want to do is
+loop through elements in the string creating display lines until we
+have covered the provided area. Simple really.  */
+void
+generate_displayable_area (struct window *w, Lisp_Object disp_string,
+			   int xpos, int ypos, int width, int height,
+			   display_line_dynarr* dla,
+			   Bufpos start_pos,
+			   face_index default_face)
+{
+int yend = ypos + height;
+Charcount s_zv;
+prop_block_dynarr *prop = 0;
+layout_bounds bounds;
+assert (dla);
+Dynarr_reset (dla);
+/* if there's nothing to do then do nothing. code after this assumes
+there is something to do. */
+if (NILP (disp_string))
+return;
+s_zv = XSTRING_CHAR_LENGTH (disp_string);
+bounds.left_out = xpos;
+bounds.right_out = xpos + width;
+/* The inner boundaries mark where the glyph margins are located. */
+bounds.left_in = bounds.left_out + window_left_margin_width (w);
+bounds.right_in = bounds.right_out - window_right_margin_width (w);
+/* We cannot fully calculate the whitespace boundaries as they
+depend on the contents of the line being displayed. */
+bounds.left_white = bounds.left_in;
+bounds.right_white = bounds.right_in;
+while (ypos < yend)
+{
+struct display_line dl;
+struct display_line *dlp;
+Bufpos next_pos;
+int local;
+if (Dynarr_length (dla) < Dynarr_largest (dla))
+	{
+	  dlp = Dynarr_atp (dla, Dynarr_length (dla));
+	  local = 0;
+	}
+else
+	{
+	  xzero (dl);
+	  dlp = &dl;
+	  local = 1;
+	}
+dlp->bounds = bounds;
+dlp->offset = 0;
+next_pos = generate_string_display_line (w, disp_string, dlp, start_pos,
+					       &prop, default_face);
+/* we need to make sure that we continue along the line if there
+is more left to display otherwise we just end up redisplaying
+the same chunk over and over again. */
+if (next_pos == start_pos && next_pos < s_zv)
+	start_pos++;
+else
+	start_pos = next_pos;
+dlp->ypos = ypos + dlp->ascent;
+ypos = dlp->ypos + dlp->descent;
+if (ypos > yend)
+	{
+	  int visible_height = dlp->ascent + dlp->descent;
+	  dlp->clip = (ypos - yend);
+	  visible_height -= dlp->clip;
+	  if (visible_height < VERTICAL_CLIP (w, 1))
+	    {
+	      if (local)
+		free_display_line (dlp);
+	      break;
+	    }
+	}
+else
+	dlp->clip = 0;
+Dynarr_add (dla, *dlp);
+/* #### This type of check needs to be done down in the
+	 generate_display_line call. */
+if (start_pos >= s_zv)
+	break;
+}
+if (prop)
+Dynarr_free (prop);
+}
+/***************************************************************************/
 /*									   */
 /*                        window-regeneration routines                     */
 /*									   */
 /***************************************************************************/
 {
 struct frame *f = XFRAME (w->frame);
 struct buffer *b = XBUFFER (w->buffer);
 int ypos = WINDOW_TEXT_TOP (w);
 int yend;	/* set farther down */
+int yclip = WINDOW_TEXT_TOP_CLIP (w);
 prop_block_dynarr *prop;
 layout_bounds bounds;
 display_line_dynarr *dla;
 int need_modeline;
 	  dlp = Dynarr_atp (dla, Dynarr_length (dla));
 	  local = 0;
 	}
 else
 	{
 	  xzero (dl);
 	  dlp = &dl;
 	  local = 1;
 	}
 dlp->bounds = bounds;
 dlp->offset = 0;
-start_pos = generate_display_line (w, dlp, 1, start_pos,
+start_pos = generate_display_line (w, dlp, 1, start_pos, &prop, type);
-					 w->hscroll, &prop, type);
-dlp->ypos = ypos + dlp->ascent;
+if (yclip > dlp->ascent)
+	{
+	  /* this should never happen, but if it does just display the
+	     whole line */
+	  yclip = 0;
+	}
+dlp->ypos = (ypos + dlp->ascent) - yclip;
 ypos = dlp->ypos + dlp->descent;
+/* See if we've been asked to start midway through a line, for
+partial display line scrolling. */
+if (yclip)
+	{
+	  dlp->top_clip = yclip;
+	  yclip = 0;
+	}
+else
+	dlp->top_clip = 0;
 if (ypos > yend)
 	{
 	  int visible_height = dlp->ascent + dlp->descent;
 	  dlp->clip = (ypos - yend);
-	  visible_height -= dlp->clip;
+	  /* Although this seems strange we could have a single very
+	     tall line visible for which we need to account for both
+	     the top clip and the bottom clip. */
+	  visible_height -= (dlp->clip + dlp->top_clip);
 	  if (visible_height < VERTICAL_CLIP (w, 1))
 	    {
 	      if (local)
 		free_display_line (dlp);
 we'll have the necessary propagation data. */
 if (line == first_line && ddl->used_prop_data)
 	return 0;
 new_start = generate_display_line (w, ddl, 0, ddl->bufpos + ddl->offset,
-					 w->hscroll, &prop, DESIRED_DISP);
+					 &prop, DESIRED_DISP);
 ddl->offset = 0;
 /* #### If there is propagated stuff the fail.  We could
 probably actually deal with this if the line had propagated
 information when originally created by a full
 cursor has disappeared or disappeared, fail.  */
 db = get_display_block_from_line (ddl, TEXT);
 if (cdl->ypos != ddl->ypos
 	  || cdl->ascent != ddl->ascent
 	  || cdl->descent != ddl->descent
+	  || cdl->top_clip != ddl->top_clip
 	  || (cdl->cursor_elt != -1 && ddl->cursor_elt == -1)
 	  || (cdl->cursor_elt == -1 && ddl->cursor_elt != -1)
 	  || old_start != ddl->bufpos
 	  || old_end != ddl->end_bufpos
 	  || initial_size != Dynarr_length (db->runes))
 /* If the line was generated using propagation data, fail. */
 if (ddl->used_prop_data)
 	return 0;
 new_start = generate_display_line (w, ddl, 0, ddl->bufpos + ddl->offset,
-					 w->hscroll, &prop, DESIRED_DISP);
+					 &prop, DESIRED_DISP);
 ddl->offset = 0;
 /* If there is propagated stuff then it is pretty much a
 guarantee that more than just the one line is affected. */
 if (prop)
 /* If any line position parameters have changed or a
 cursor has disappeared or disappeared, fail. */
 if (cdl->ypos != ddl->ypos
 	  || cdl->ascent != ddl->ascent
 	  || cdl->descent != ddl->descent
+	  || cdl->top_clip != ddl->top_clip
 	  || (cdl->cursor_elt != -1 && ddl->cursor_elt == -1)
 	  || (cdl->cursor_elt == -1 && ddl->cursor_elt != -1))
 	{
 	  return 0;
 	}
 	    pointm = BUF_ZV (b);
 	}
 }
 Fset_marker (w->pointm[DESIRED_DISP], make_int (pointm), the_buffer);
-/* If the buffer has changed we have to invalid all of our face
+/* If the buffer has changed we have to invalidate all of our face
 cache elements. */
 if ((!echo_active && b != window_display_buffer (w))
 || !Dynarr_length (w->face_cachels)
 || f->faces_changed)
 reset_face_cachels (w);
 else
 mark_face_cachels_as_not_updated (w);
-/* Ditto the glyph cache elements. */
+/* Ditto the glyph cache elements, although we do *not* invalidate
+the cache purely because glyphs have changed - this is now
+handled by the dirty flag.*/
 if ((!echo_active && b != window_display_buffer (w))
-|| !Dynarr_length (w->glyph_cachels)
+|| !Dynarr_length (w->glyph_cachels) || f->faces_changed)
-|| f->glyphs_changed)
 reset_glyph_cachels (w);
 else
 mark_glyph_cachels_as_not_updated (w);
 /* If the marker's buffer is not the window's buffer, then we need
 	  && !f->clip_changed
 	  && !f->extents_changed
 	  && !f->faces_changed
 	  && !f->glyphs_changed
 	  && !f->subwindows_changed
+	  && !f->subwindows_state_changed
 	  && !f->point_changed
 	  && !f->windows_structure_changed)
 	{
 	  /* If not, we're done. */
 	  if (f->modeline_changed)
 	      && !f->clip_changed
 	      && !f->extents_changed
 	      && !f->faces_changed
 	      && !f->glyphs_changed
 	      && !f->subwindows_changed
+	      && !f->subwindows_state_changed
 	      && !f->windows_structure_changed)
 	    {
 	      if (point_visible (w, pointm, CURRENT_DISP)
 		  && w->last_point_x[CURRENT_DISP] != -1
 		  && w->last_point_y[CURRENT_DISP] != -1)
 else if (!w->windows_changed
 	   && !f->clip_changed
 	   && !f->faces_changed
 	   && !f->glyphs_changed
 	   && !f->subwindows_changed
+	   && !f->subwindows_state_changed
 	   && !f->windows_structure_changed
 	   && !f->frame_changed
 	   && !truncation_changed
 	   && pointm >= startp
 	   && regenerate_window_incrementally (w, startp, pointm))
 {
 Bufpos start = marker_position (w->start[DESIRED_DISP]);
 Bufpos end = (w->window_end_pos[DESIRED_DISP] == -1
 		    ? BUF_ZV (b)
 		    : BUF_Z (b) - w->window_end_pos[DESIRED_DISP] - 1);
+/* Don't pollute the cache if not sure if we are correct */
-update_line_start_cache (w, start, end, pointm, 1);
+if (w->start_at_line_beg)
+	update_line_start_cache (w, start, end, pointm, 1);
 redisplay_output_window (w);
 /*
 * If we just displayed the echo area, the line start cache is
 * no longer valid, because the minibuffer window is associated
 * with the window now.
 }
 /* #### This should be dependent on face changes and will need to be
 somewhere else once tty updates occur on a per-frame basis. */
 mark_face_cachels_as_clean (w);
+/* The glyph cachels only get dirty if someone changed something.
+Since redisplay has now effectively ended we can reset the dirty
+flag since everything must be up-to-date. */
+if (glyphs_changed)
+mark_glyph_cachels_as_clean (w);
 w->windows_changed = 0;
 }
 /* Call buffer_reset_changes for all buffers present in any window
 #ifdef HAVE_TOOLBARS
 /* Update the toolbars. */
 update_frame_toolbars (f);
 #endif /* HAVE_TOOLBARS */
+/* If we clear the frame we have to force its contents to be redrawn. */
+if (f->clear)
+f->frame_changed = 1;
+/* invalidate the subwindow cache. We use subwindows_changed here to
+cause subwindows to get instantiated. This is because
+subwindows_state_changed is less strict - dealing with things
+like the clicked state of button. We have to do this before
+redisplaying the gutters as subwindows get unmapped in the
+process.*/
+if (!Dynarr_length (f->subwindow_cachels)
+|| f->subwindows_changed
+|| f->faces_changed
+|| f->frame_changed)
+{
+reset_subwindow_cachels (f);
+/* we have to do this so the gutter gets regenerated. */
+reset_gutter_display_lines (f);
+}
+else
+mark_subwindow_cachels_as_not_updated (f);
+/* We can now update the gutters, safe in the knowledge that our
+efforts won't get undone. */
+update_frame_gutters (f);
 hold_frame_size_changes ();
 /* ----------------- BEGIN CRITICAL REDISPLAY SECTION ---------------- */
 /* Within this section, we are defenseless and assume that the
 following cannot happen:
 we simply return. #### We should abort instead.
 #### If a frame-size change does occur we should probably
 actually be preempting redisplay. */
-/* If we clear the frame we have to force its contents to be redrawn. */
-if (f->clear)
-f->frame_changed = 1;
 /* Erase the frame before outputting its contents. */
 if (f->clear)
 {
 DEVMETH (d, clear_frame, (f));
 }
-/* invalidate the subwindow cache. we are going to reuse the glyphs
-flag here to cause subwindows to get instantiated. This is
-because subwindows changed is less strict - dealing with things
-like the clicked state of button. */
-if (!Dynarr_length (f->subwindow_cachels)
-|| f->glyphs_changed
-|| f->frame_changed)
-reset_subwindow_cachels (f);
-else
-mark_subwindow_cachels_as_not_updated (f);
 /* Do the selected window first. */
 redisplay_window (FRAME_SELECTED_WINDOW (f), 0);
 /* Then do the rest. */
 if (FRAME_TTY_P (f))
 DEVMETH (d, output_end, (d));
 update_frame_title (f);
-f->buffers_changed  = 0;
+CLASS_RESET_CHANGED_FLAGS (f);
-f->clip_changed     = 0;
-f->extents_changed  = 0;
-f->faces_changed    = 0;
-f->frame_changed    = 0;
-f->glyphs_changed   = 0;
-f->subwindows_changed   = 0;
-f->icon_changed     = 0;
-f->menubar_changed  = 0;
-f->modeline_changed = 0;
-f->point_changed    = 0;
-f->toolbar_changed  = 0;
-f->windows_changed  = 0;
-f->windows_structure_changed = 0;
 f->window_face_cache_reset = 0;
 f->echo_area_garbaged = 0;
 f->clear = 0;
 if (!f->size_change_pending)
 f->size_changed = 0;
 map_windows (f, call_redisplay_end_triggers, 0);
 return 0;
 }
-/* Ensure that all frames on the given device are correctly displayed. */
+/* Ensure that all frames on the given device are correctly displayed.
+If AUTOMATIC is non-zero, and the device implementation indicates
+no automatic redisplay, as printers do, then the device is not
+redisplayed. AUTOMATIC is set to zero when called from lisp
+functions (redraw-device) and (redisplay-device), and to non-zero
+when called from "lazy" redisplay();
+*/
 static int
-redisplay_device (struct device *d)
+redisplay_device (struct device *d, int automatic)
 {
 Lisp_Object frame, frmcons;
 int preempted = 0;
 int size_change_failed = 0;
 struct frame *f;
+if (automatic
+&& (MAYBE_INT_DEVMETH (d, device_implementation_flags, ())
+	  & XDEVIMPF_NO_AUTO_REDISPLAY))
+return 0;
 if (DEVICE_STREAM_P (d)) /* nothing to do */
 return 0;
 /* It is possible that redisplay has been called before the
 if (f->icon_changed || f->windows_changed)
 update_frame_icon (f);
 if (FRAME_REPAINT_P (f))
 {
-if (f->buffers_changed  || f->clip_changed  || f->extents_changed ||
+if (CLASS_REDISPLAY_FLAGS_CHANGEDP(f))
-	  f->faces_changed    || f->frame_changed || f->menubar_changed ||
-	  f->modeline_changed || f->point_changed || f->size_changed    ||
-	  f->toolbar_changed  || f->windows_changed || f->size_slipped  ||
-	  f->windows_structure_changed || f->glyphs_changed || f->subwindows_changed)
 	{
 	  preempted = redisplay_frame (f, 0);
 	}
 if (preempted)
 if (f->icon_changed || f->windows_changed)
 	update_frame_icon (f);
 if (FRAME_REPAINT_P (f))
 	{
-	  if (f->buffers_changed  || f->clip_changed  || f->extents_changed ||
+	  if (CLASS_REDISPLAY_FLAGS_CHANGEDP (f))
-	      f->faces_changed    || f->frame_changed || f->menubar_changed ||
-	      f->modeline_changed || f->point_changed || f->size_changed    ||
-	      f->toolbar_changed  || f->windows_changed ||
-	      f->windows_structure_changed ||
-	      f->glyphs_changed || f->subwindows_changed)
 	    {
 	      preempted = redisplay_frame (f, 0);
 	    }
 	  if (preempted)
 	}
 }
 /* If we get here then we redisplayed all of our frames without
 getting preempted so mark ourselves as clean. */
-d->buffers_changed  = 0;
+CLASS_RESET_CHANGED_FLAGS (d);
-d->clip_changed     = 0;
-d->extents_changed  = 0;
-d->faces_changed    = 0;
-d->frame_changed    = 0;
-d->glyphs_changed   = 0;
-d->subwindows_changed   = 0;
-d->icon_changed     = 0;
-d->menubar_changed  = 0;
-d->modeline_changed = 0;
-d->point_changed    = 0;
-d->toolbar_changed  = 0;
-d->windows_changed  = 0;
-d->windows_structure_changed = 0;
 if (!size_change_failed)
 d->size_changed = 0;
 return 0;
 }
 if (asynch_device_change_pending)
 handle_asynch_device_change ();
-if (!buffers_changed && !clip_changed     && !extents_changed &&
+if (!GLOBAL_REDISPLAY_FLAGS_CHANGEDP &&
-!faces_changed   && !frame_changed    && !icon_changed    &&
+!disable_preemption && preemption_count < max_preempts)
-!menubar_changed && !modeline_changed && !point_changed   &&
-!size_changed    && !toolbar_changed  && !windows_changed &&
-!glyphs_changed  && !subwindows_changed &&
-!windows_structure_changed && !disable_preemption &&
-preemption_count < max_preempts)
 goto done;
 DEVICE_LOOP_NO_BREAK (devcons, concons)
 {
 struct device *d = XDEVICE (XCAR (devcons));
 int preempted;
-if (d->buffers_changed  || d->clip_changed     || d->extents_changed ||
+if (CLASS_REDISPLAY_FLAGS_CHANGEDP (d))
-	  d->faces_changed    || d->frame_changed    || d->icon_changed    ||
+	{
-	  d->menubar_changed  || d->modeline_changed || d->point_changed   ||
+	  preempted = redisplay_device (d, 1);
-	  d->size_changed     || d->toolbar_changed  || d->windows_changed ||
-	  d->windows_structure_changed ||
-	  d->glyphs_changed || d->subwindows_changed)
-	{
-	  preempted = redisplay_device (d);
 	  if (preempted)
 	    {
 	      preemption_count++;
 	      RESET_CHANGED_SET_FLAGS;
 	}
 }
 preemption_count = 0;
 /* Mark redisplay as accurate */
-buffers_changed  = 0;
+GLOBAL_RESET_CHANGED_FLAGS;
-clip_changed     = 0;
-extents_changed  = 0;
-frame_changed    = 0;
-glyphs_changed   = 0;
-subwindows_changed   = 0;
-icon_changed     = 0;
-menubar_changed  = 0;
-modeline_changed = 0;
-point_changed    = 0;
-toolbar_changed  = 0;
-windows_changed  = 0;
-windows_structure_changed = 0;
 RESET_CHANGED_SET_FLAGS;
 if (faces_changed)
 {
 mark_all_faces_as_clean ();
 static void
 decode_mode_spec (struct window *w, Emchar spec, int type)
 {
 Lisp_Object obj = Qnil;
-CONST char *str = NULL;
+const char *str = NULL;
 struct buffer *b = XBUFFER (w->buffer);
 Dynarr_reset (mode_spec_bufbyte_string);
 switch (spec)
 	char buf[32];
 	long_to_string (buf, col);
 	Dynarr_add_many (mode_spec_bufbyte_string,
-			 (CONST Bufbyte *) buf, strlen (buf));
+			 (const Bufbyte *) buf, strlen (buf));
 	goto decode_mode_spec_done;
 }
 /* print the file coding system */
 case 'C':
 /* print percent of buffer above top of window, or Top, Bot or All */
 case 'p':
 {
 Bufpos pos = marker_position (w->start[type]);
-Charcount total = BUF_ZV (b) - BUF_BEGV (b);
 /* This had better be while the desired lines are being done. */
 if (w->window_end_pos[type] <= BUF_Z (b) - BUF_ZV (b))
 	{
 	  if (pos <= BUF_BEGV (b))
 else
 	{
 	  /* This hard limit is ok since the string it will hold has a
 fixed maximum length of 3.  But just to be safe... */
 	  char buf[10];
+	  Charcount chars = pos - BUF_BEGV (b);
-	  total = ((pos - BUF_BEGV (b)) * 100 + total - 1) / total;
+	  Charcount total = BUF_ZV (b) - BUF_BEGV (b);
+	  /* Avoid overflow on big buffers */
+	  int percent = total > LONG_MAX/200 ?
+	    (chars + total/200) / (total / 100) :
+	    (chars * 100 + total/2) / total;
 	  /* We can't normally display a 3-digit number, so get us a
 2-digit number that is close. */
-	  if (total == 100)
+	  if (percent == 100)
-	    total = 99;
+	    percent = 99;
-	  sprintf (buf, "%2d%%", total);
+	  sprintf (buf, "%d%%", percent);
 	  Dynarr_add_many (mode_spec_bufbyte_string, (Bufbyte *) buf,
 			   strlen (buf));
 	  goto decode_mode_spec_done;
 	}
 Top, or print Bottom or All */
 case 'P':
 {
 Bufpos toppos = marker_position (w->start[type]);
 Bufpos botpos = BUF_Z (b) - w->window_end_pos[type];
-Charcount total = BUF_ZV (b) - BUF_BEGV (b);
 /* botpos is only accurate as of the last redisplay, so we can
 only treat it as a hint.  In particular, after erase-buffer,
 botpos may be negative. */
 if (botpos < toppos)
 else
 	{
 	  /* This hard limit is ok since the string it will hold has a
 fixed maximum length of around 6.  But just to be safe... */
 	  char buf[10];
+	  Charcount chars = botpos - BUF_BEGV (b);
-	  total = ((botpos - BUF_BEGV (b)) * 100 + total - 1) / total;
+	  Charcount total = BUF_ZV (b) - BUF_BEGV (b);
+	  /* Avoid overflow on big buffers */
+	  int percent = total > LONG_MAX/200 ?
+	    (chars + total/200) / (total / 100) :
+	    (chars * 100 + total/2) / max (total, 1);
 	  /* We can't normally display a 3-digit number, so get us a
 2-digit number that is close. */
-	  if (total == 100)
+	  if (percent == 100)
-	    total = 99;
+	    percent = 99;
 	  if (toppos <= BUF_BEGV (b))
-	    sprintf (buf, "Top%2d%%", total);
+	    sprintf (buf, "Top%d%%", percent);
 	  else
-	    sprintf (buf, "%2d%%", total);
+	    sprintf (buf, "%d%%", percent);
 	  Dynarr_add_many (mode_spec_bufbyte_string, (Bufbyte *) buf,
 			   strlen (buf));
 	  goto decode_mode_spec_done;
 /* Given an array of display lines, free them and all data structures
 contained within them. */
-static void
+void
 free_display_lines (display_line_dynarr *dla)
 {
 int line;
 for (line = 0; line < Dynarr_largest (dla); line++)
 }
 }
 static void
-mark_glyph_block_dynarr (glyph_block_dynarr *gba, void (*markobj) (Lisp_Object))
+mark_glyph_block_dynarr (glyph_block_dynarr *gba)
 {
 if (gba)
 {
 glyph_block *gb = Dynarr_atp (gba, 0);
 glyph_block *gb_last = Dynarr_atp (gba, Dynarr_length (gba));
 for (; gb < gb_last; gb++)
 	{
 	  if (!NILP (gb->glyph))
-	    markobj (gb->glyph);
+	    mark_object (gb->glyph);
 	  if (!NILP (gb->extent))
-	    markobj (gb->extent);
+	    mark_object (gb->extent);
 	}
 }
 }
 static void
-mark_redisplay_structs (display_line_dynarr *dla, void (*markobj) (Lisp_Object))
+mark_redisplay_structs (display_line_dynarr *dla)
 {
 display_line *dl = Dynarr_atp (dla, 0);
 display_line *dl_last = Dynarr_atp (dla, Dynarr_length (dla));
 for (; dl < dl_last; dl++)
 	  for (; r < r_last; r++)
 	    {
 	      if (r->type == RUNE_DGLYPH)
 		{
 		  if (!NILP (r->object.dglyph.glyph))
-		    markobj (r->object.dglyph.glyph);
+		    mark_object (r->object.dglyph.glyph);
 		  if (!NILP (r->object.dglyph.extent))
-		    markobj (r->object.dglyph.extent);
+		    mark_object (r->object.dglyph.extent);
 		}
 	    }
 	}
-mark_glyph_block_dynarr (dl->left_glyphs,  markobj);
+mark_glyph_block_dynarr (dl->left_glyphs);
-mark_glyph_block_dynarr (dl->right_glyphs, markobj);
+mark_glyph_block_dynarr (dl->right_glyphs);
 }
 }
 static void
-mark_window_mirror (struct window_mirror *mir, void (*markobj)(Lisp_Object))
+mark_window_mirror (struct window_mirror *mir)
 {
-mark_redisplay_structs (mir->current_display_lines, markobj);
+mark_redisplay_structs (mir->current_display_lines);
-mark_redisplay_structs (mir->desired_display_lines, markobj);
+mark_redisplay_structs (mir->desired_display_lines);
 if (mir->next)
-mark_window_mirror (mir->next, markobj);
+mark_window_mirror (mir->next);
 if (mir->hchild)
-mark_window_mirror (mir->hchild, markobj);
+mark_window_mirror (mir->hchild);
 else if (mir->vchild)
-mark_window_mirror (mir->vchild, markobj);
+mark_window_mirror (mir->vchild);
 }
 void
-mark_redisplay (void (*markobj)(Lisp_Object))
+mark_redisplay (void)
 {
 Lisp_Object frmcons, devcons, concons;
 FRAME_LOOP_NO_BREAK (frmcons, devcons, concons)
 {
 struct frame *f = XFRAME (XCAR (frmcons));
 update_frame_window_mirror (f);
-mark_window_mirror (f->root_mirror, markobj);
+mark_window_mirror (f->root_mirror);
 }
 }
 /*****************************************************************************
 Line Start Cache Description and Rationale
 applicable.
 ****************************************************************************/
 /* This will get used quite a bit so we don't want to be constantly
 allocating and freeing it. */
-line_start_cache_dynarr *internal_cache;
+static line_start_cache_dynarr *internal_cache;
 /* Makes internal_cache represent the TYPE display structs and only
 the TYPE display structs. */
 static void
 int
 point_would_be_visible (struct window *w, Bufpos startp, Bufpos point)
 {
 struct buffer *b = XBUFFER (w->buffer);
-int pixpos = 0;
+int pixpos = -WINDOW_TEXT_TOP_CLIP(w);
 int bottom = WINDOW_TEXT_HEIGHT (w);
 int start_elt;
 /* If point is before the intended start it obviously can't be visible. */
 if (point < startp)
 	  else
 	    return cur_pos;
 	}
 cur_elt--;
-if (cur_elt < 0)
+while (cur_elt < 0)
 	{
 	  Bufpos from, to;
 	  int win_char_height;
 	  if (cur_pos <= BUF_BEGV (b))
 	  from = find_next_newline_no_quit (b, cur_pos, -win_char_height);
 	  to = line_start_cache_end (w);
 	  update_line_start_cache (w, from, to, point, 0);
 	  cur_elt = point_in_line_start_cache (w, cur_pos, 2) - 1;
-	  assert (cur_elt >= 0);
+	  assert (cur_elt >= -1);
+	  /* This used to be cur_elt>=0 under the assumption that if
+	     point is in the top line and not at BUF_BEGV, then
+	     setting the window_start to a newline before the start of
+	     the first line will always cause scrolling.
+	     However in my (jv) opinion this is wrong.  That new line
+	     can be hidden in various ways: invisible extents, an
+	     explicit window-start not at a newline character etc.
+	     The existence of those are indeed known to create crashes
+	     on that assert.  So we have no option but to continue the
+	     search if we found point at the top of the line_start_cache
+	     again. */
+	  cur_pos = Dynarr_atp (w->line_start_cache,0)->start;
 	}
 prev_pos = cur_pos;
 }
 }
 DEVICE_FRAME_LOOP (frmcons, d)
 {
 XFRAME (XCAR (frmcons))->clear = 1;
 }
-redisplay_device (d);
+redisplay_device (d, 0);
 return unbind_to (count, Qnil);
 }
 DEFUN ("redisplay-device", Fredisplay_device, 0, 2, 0, /*
 record_unwind_protect (restore_disable_preemption_value,
 			     make_int (disable_preemption));
 disable_preemption++;
 }
-redisplay_device (d);
+redisplay_device (d, 0);
 return unbind_to (count, Qnil);
 }
 /* Big lie.  Big lie.  This will force all modelines to be updated
 global_redisplay_change. */
 MARK_CLIP_CHANGED;
 return 0;
 }
+/* This is called if the built-in glyphs have their properties
+changed. */
 void
 redisplay_glyph_changed (Lisp_Object glyph, Lisp_Object property,
 			 Lisp_Object locale)
 {
 if (WINDOWP (locale))
 {
 disable_preemption = 0;
 preemption_count = 0;
 max_preempts = INIT_MAX_PREEMPTS;
+#ifndef PDUMP
 if (!initialized)
-{
+#endif
-cmotion_display_lines = Dynarr_new (display_line);
+{
-mode_spec_bufbyte_string = Dynarr_new (Bufbyte);
+if (!cmotion_display_lines)
-formatted_string_emchar_dynarr = Dynarr_new (Emchar);
+	cmotion_display_lines = Dynarr_new (display_line);
-formatted_string_extent_dynarr = Dynarr_new (EXTENT);
+if (!mode_spec_bufbyte_string)
-formatted_string_extent_start_dynarr = Dynarr_new (Bytecount);
+	mode_spec_bufbyte_string = Dynarr_new (Bufbyte);
-formatted_string_extent_end_dynarr = Dynarr_new (Bytecount);
+if (!formatted_string_extent_dynarr)
-internal_cache = Dynarr_new (line_start_cache);
+	formatted_string_extent_dynarr = Dynarr_new (EXTENT);
-xzero (formatted_string_display_line);
+if (!formatted_string_extent_start_dynarr)
+	formatted_string_extent_start_dynarr = Dynarr_new (Bytecount);
+if (!formatted_string_extent_end_dynarr)
+	formatted_string_extent_end_dynarr = Dynarr_new (Bytecount);
+if (!internal_cache)
+	internal_cache = Dynarr_new (line_start_cache);
 }
 /* window system is nil when in -batch mode */
 if (!initialized || noninteractive)
 return;
 defsymbol (&Qpre_redisplay_hook, "pre-redisplay-hook");
 defsymbol (&Qpost_redisplay_hook, "post-redisplay-hook");
 #endif /* INHIBIT_REDISPLAY_HOOKS */
 defsymbol (&Qdisplay_warning_buffer, "display-warning-buffer");
 defsymbol (&Qbar_cursor, "bar-cursor");
-defsymbol (&Qwindow_scroll_functions, "window-scroll-functions");
 defsymbol (&Qredisplay_end_trigger_functions,
 	     "redisplay-end-trigger-functions");
 DEFSUBR (Fredisplay_echo_area);
 DEFSUBR (Fredraw_frame);
 DEFSUBR (Fredraw_modeline);
 DEFSUBR (Fforce_cursor_redisplay);
 }
 void
+reinit_vars_of_redisplay (void)
+{
+updating_line_start_cache = 0;
+}
+void
 vars_of_redisplay (void)
 {
+reinit_vars_of_redisplay ();
 #if 0
 staticpro (&last_arrow_position);
 staticpro (&last_arrow_string);
 last_arrow_position = Qnil;
 last_arrow_string = Qnil;
 #endif /* 0 */
-updating_line_start_cache = 0;
 /* #### Probably temporary */
 DEFVAR_INT ("redisplay-cache-adjustment", &cache_adjustment /*
 \(Temporary) Setting this will impact the performance of the internal
 line start cache.
 instead.
 */ );
 Vwindow_system = Qnil;
 /* #### Temporary shit until window-system is eliminated. */
-DEFVAR_LISP ("initial-window-system", &Vinitial_window_system /*
+DEFVAR_CONST_LISP ("initial-window-system", &Vinitial_window_system /*
 DON'T TOUCH
 */ );
 Vinitial_window_system = Qnil;
 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area /*
 This is a specifier; use `set-specifier' to change it.
 */ );
 Vleft_margin_width = Fmake_specifier (Qnatnum);
 set_specifier_fallback (Vleft_margin_width, list1 (Fcons (Qnil, Qzero)));
 set_specifier_caching (Vleft_margin_width,
-			 slot_offset (struct window, left_margin_width),
+			 offsetof (struct window, left_margin_width),
 			 some_window_value_changed,
-			 slot_offset (struct frame, left_margin_width),
+			 offsetof (struct frame, left_margin_width),
 			 margin_width_changed_in_frame);
 DEFVAR_SPECIFIER ("right-margin-width", &Vright_margin_width /*
 *Width of right margin.
 This is a specifier; use `set-specifier' to change it.
 */ );
 Vright_margin_width = Fmake_specifier (Qnatnum);
 set_specifier_fallback (Vright_margin_width, list1 (Fcons (Qnil, Qzero)));
 set_specifier_caching (Vright_margin_width,
-			 slot_offset (struct window, right_margin_width),
+			 offsetof (struct window, right_margin_width),
 			 some_window_value_changed,
-			 slot_offset (struct frame, right_margin_width),
+			 offsetof (struct frame, right_margin_width),
 			 margin_width_changed_in_frame);
 DEFVAR_SPECIFIER ("minimum-line-ascent", &Vminimum_line_ascent /*
 *Minimum ascent height of lines.
 This is a specifier; use `set-specifier' to change it.
 */ );
 Vminimum_line_ascent = Fmake_specifier (Qnatnum);
 set_specifier_fallback (Vminimum_line_ascent, list1 (Fcons (Qnil, Qzero)));
 set_specifier_caching (Vminimum_line_ascent,
-			 slot_offset (struct window, minimum_line_ascent),
+			 offsetof (struct window, minimum_line_ascent),
 			 some_window_value_changed,
 			 0, 0);
 DEFVAR_SPECIFIER ("minimum-line-descent", &Vminimum_line_descent /*
 *Minimum descent height of lines.
 This is a specifier; use `set-specifier' to change it.
 */ );
 Vminimum_line_descent = Fmake_specifier (Qnatnum);
 set_specifier_fallback (Vminimum_line_descent, list1 (Fcons (Qnil, Qzero)));
 set_specifier_caching (Vminimum_line_descent,
-			 slot_offset (struct window, minimum_line_descent),
+			 offsetof (struct window, minimum_line_descent),
 			 some_window_value_changed,
 			 0, 0);
 DEFVAR_SPECIFIER ("use-left-overflow", &Vuse_left_overflow /*
 *Non-nil means use the left outside margin as extra whitespace when
 This is a specifier; use `set-specifier' to change it.
 */ );
 Vuse_left_overflow = Fmake_specifier (Qboolean);
 set_specifier_fallback (Vuse_left_overflow, list1 (Fcons (Qnil, Qnil)));
 set_specifier_caching (Vuse_left_overflow,
-			 slot_offset (struct window, use_left_overflow),
+			 offsetof (struct window, use_left_overflow),
 			 some_window_value_changed,
 			 0, 0);
 DEFVAR_SPECIFIER ("use-right-overflow", &Vuse_right_overflow /*
 *Non-nil means use the right outside margin as extra whitespace when
 This is a specifier; use `set-specifier' to change it.
 */ );
 Vuse_right_overflow = Fmake_specifier (Qboolean);
 set_specifier_fallback (Vuse_right_overflow, list1 (Fcons (Qnil, Qnil)));
 set_specifier_caching (Vuse_right_overflow,
-			 slot_offset (struct window, use_right_overflow),
+			 offsetof (struct window, use_right_overflow),
 			 some_window_value_changed,
 			 0, 0);
 DEFVAR_SPECIFIER ("text-cursor-visible-p", &Vtext_cursor_visible_p /*
 *Non-nil means the text cursor is visible (this is usually the case).
 This is a specifier; use `set-specifier' to change it.
 */ );
 Vtext_cursor_visible_p = Fmake_specifier (Qboolean);
 set_specifier_fallback (Vtext_cursor_visible_p, list1 (Fcons (Qnil, Qt)));
 set_specifier_caching (Vtext_cursor_visible_p,
-			 slot_offset (struct window, text_cursor_visible_p),
+			 offsetof (struct window, text_cursor_visible_p),
 			 text_cursor_visible_p_changed,
 			 0, 0);
 }

Mercurial > hg > xemacs-beta

comparison src/redisplay.c @ 398:74fd4e045ea6 r21-2-29