xemacs-beta: src/redisplay-output.c comparison

comparison src/redisplay-output.c @ 424:11054d720c21 r21-2-20

Import from CVS: tag r21-2-20

author	cvs
date	Mon, 13 Aug 2007 11:26:11 +0200
parents	95016f13131a
children

comparison

equal deleted inserted replaced

-:28d9c139be4c
+:11054d720c21
 /* Synchronize redisplay structures and output changes.
 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
 Copyright (C) 1995, 1996 Ben Wing.
 Copyright (C) 1996 Chuck Thompson.
+Copyright (C) 1999 Andy Piper.
 This file is part of XEmacs.
 XEmacs is free software; you can redistribute it and/or modify it
 under the terms of the GNU General Public License as published by the
 /* Synched up with: Not in FSF. */
 /* This file has been Mule-ized. */
 /* Author: Chuck Thompson */
+/* Heavily hacked for modularity, gutter and subwindow support by Andy
+Piper. */
 #include <config.h>
 #include "lisp.h"
 #include "buffer.h"
 				     int run_end_begin_glyphs);
 static void redisplay_output_display_block (struct window *w, struct display_line *dl,
 					    int block, int start, int end, int start_pixpos,
 					    int cursor_start, int cursor_width,
 					    int cursor_height);
+static void redisplay_normalize_display_box (struct display_box* dest,
+					     struct display_glyph_area* src);
+static int redisplay_display_boxes_in_window_p (struct window* w,
+						struct display_box* db,
+						struct display_glyph_area* dga);
+static void redisplay_clear_clipped_region (Lisp_Object locale, face_index findex,
+					    struct display_box* dest,
+					    struct display_glyph_area* glyphsrc,
+					    int fullheight_p, Lisp_Object);
 /*****************************************************************************
 sync_rune_structs
 Synchronize the given rune blocks.
 else if (crb->type != drb->type)
 return 0;
 else if (crb->type == RUNE_CHAR &&
 	   (crb->object.chr.ch != drb->object.chr.ch))
 return 0;
-else if (crb->type == RUNE_DGLYPH &&
+else if (crb->type == RUNE_HLINE &&
+	   (crb->object.hline.thickness != drb->object.hline.thickness ||
+	    crb->object.hline.yoffset != drb->object.hline.yoffset))
+return 0;
+else if (crb->type == RUNE_DGLYPH &&
 	   (!EQ (crb->object.dglyph.glyph, drb->object.dglyph.glyph) ||
 	    !EQ (crb->object.dglyph.extent, drb->object.dglyph.extent) ||
 	    crb->object.dglyph.xoffset != drb->object.dglyph.xoffset))
 return 0;
-else if (crb->type == RUNE_HLINE &&
+/* Only check dirtiness if we know something has changed. */
-	   (crb->object.hline.thickness != drb->object.hline.thickness ||
+else if (crb->type == RUNE_DGLYPH &&
-	    crb->object.hline.yoffset != drb->object.hline.yoffset))
+	   XFRAME (w->frame)->glyphs_changed)
-return 0;
+{
+glyph_index gindex = get_glyph_cachel_index (w, drb->object.dglyph.glyph);
+/* Although doing the cachel lookup for every comparison is
+	 very expensive.we have to do it to make sure the cache is
+	 up-to-date. */
+if (GLYPH_CACHEL_DIRTYP (w, gindex))
+	return 0;
+else
+	return 1;
+}
 else
 return 1;
 }
 /*****************************************************************************
 #endif
 )
 force = 1;
 if (f->windows_structure_changed ||
+/* #### Why is this so? We have face cachels so that we don't
+have to recalculate all the display blocks when faces
+change. I have fixed this for glyphs and am inclined to think
+that faces should "Just Work", but I'm not feeling brave
+today. Maybe its because the face cachels represent merged
+faces rather than simply instantiations in a particular
+domain. */
 f->faces_changed ||
-f->glyphs_changed ||
 cdl->ypos != ddl->ypos ||
 cdl->ascent != ddl->ascent ||
 cdl->descent != ddl->descent ||
 cdl->clip != ddl->clip ||
 force)
 		  f->faces_changed ||
 		  force ||
 		  (cdl && (cdl->ypos != ddl->ypos ||
 			   cdl->ascent != ddl->ascent ||
 			   cdl->descent != ddl->descent ||
+			   cdl->top_clip != ddl->top_clip ||
 			   cdl->clip != ddl->clip)))
 		{
 		  int x, y, width, height;
 		  face_index findex;
 		  must_sync = 1;
 		  x = start_pixpos;
-		  y = ddl->ypos - ddl->ascent;
+		  y = DISPLAY_LINE_YPOS (ddl);
 		  width = min (next_start_pixpos, block_end) - x;
-		  height = ddl->ascent + ddl->descent - ddl->clip;
+		  height = DISPLAY_LINE_HEIGHT (ddl);
 		  if (x < ddl->bounds.left_in)
 		    {
 		      findex = ddl->left_margin_findex ?
 			ddl->left_margin_findex
 	  /* If there was formerly no block over the current
 	     region or if it was a block of a different type, then
 	     output the entire ddb.  Otherwise, compare cdb and
 	     ddb and output only the changed region. */
-	  if (!force && cdb && ddb->type == cdb->type && b == old_b)
+	  if (!force && cdb && ddb->type == cdb->type
+	      /* If there was no buffer being display before the
+compare anyway as we might be outputting a gutter. */
+	      &&
+	      (b == old_b || !old_b))
 	    {
 	      must_sync |= compare_display_blocks (w, cdl, ddl, old_block,
 						   block, start_pixpos,
 						   cursor_start, cursor_width,
 						   cursor_height);
 /* #### Doing this on f->clear sucks but is necessary because of
 window-local background values. */
 if (f->windows_structure_changed || f->faces_changed || clear_border
 || f->clear)
 {
-int y = ddl->ypos - ddl->ascent;
+int y = DISPLAY_LINE_YPOS (ddl);
-int height = ddl->ascent + ddl->descent - ddl->clip;
+int height = DISPLAY_LINE_HEIGHT (ddl);
-if (ddl->modeline)
+/* If we are in the gutter then we musn't clear the borders. */
-	{
+if (y >= WINDOW_TEXT_TOP (w) && (y + height) <= WINDOW_TEXT_BOTTOM (w))
-	  y -= MODELINE_SHADOW_THICKNESS (w);
+	{
-	  height += (2 * MODELINE_SHADOW_THICKNESS (w));
+	  if (ddl->modeline)
-	}
+	    {
+	      y -= MODELINE_SHADOW_THICKNESS (w);
-if (window_is_leftmost (w))
+	      height += (2 * MODELINE_SHADOW_THICKNESS (w));
-	clear_left_border (w, y, height);
+	    }
-if (window_is_rightmost (w))
-	clear_right_border (w, y, height);
+	  if (window_is_leftmost (w))
+	    clear_left_border (w, y, height);
+	  if (window_is_rightmost (w))
+	    clear_right_border (w, y, height);
+	}
 }
 if (cdla)
 sync_display_line_structs (w, line, must_sync, cdla, ddla);
 }
 				int start, int end, int start_pixpos, int cursor_start,
 				int cursor_width, int cursor_height)
 {
 struct frame *f = XFRAME (w->frame);
 struct device *d = XDEVICE (f->device);
+struct display_block *db = Dynarr_atp (dl->display_blocks, block);
+rune_dynarr *rba = db->runes;
+struct rune *rb;
+int xpos, width;
+rb = Dynarr_atp (rba, start);
+if (!rb)
+/* Nothing to do so don't do anything. */
+return;
+xpos = max (start_pixpos, rb->xpos);
+if (end < 0)
+end = Dynarr_length (rba);
+rb  = Dynarr_atp (rba, end - 1);
+width = rb->xpos + rb->width - xpos;
+/* now actually output the block. */
 DEVMETH (d, output_display_block, (w, dl, block, start,
 				     end, start_pixpos,
 				     cursor_start, cursor_width,
 				     cursor_height));
 }
 /****************************************************************************
 redisplay_unmap_subwindows
 Remove subwindows from the area in the box defined by the given
 parameters.
 ****************************************************************************/
-static void redisplay_unmap_subwindows (struct frame* f, int x, int y, int width, int height)
+static void redisplay_unmap_subwindows (struct frame* f, int x, int y, int width, int height,
+					Lisp_Object ignored_window)
 {
 int elt;
 for (elt = 0; elt < Dynarr_length (f->subwindow_cachels); elt++)
 {
 if (cachel->being_displayed
 	  &&
 	  cachel->x + cachel->width > x && cachel->x < x + width
 	  &&
-	  cachel->y + cachel->height > y && cachel->y < y + height)
+	  cachel->y + cachel->height > y && cachel->y < y + height
+	  &&
+	  !EQ (cachel->subwindow, ignored_window))
 	{
 	  unmap_subwindow (cachel->subwindow);
 	}
 }
 }
 ****************************************************************************/
 void redisplay_unmap_subwindows_maybe (struct frame* f, int x, int y, int width, int height)
 {
 if (Dynarr_length (FRAME_SUBWINDOW_CACHE (f)))
 {
-redisplay_unmap_subwindows (f, x, y, width, height);
+redisplay_unmap_subwindows (f, x, y, width, height, Qnil);
+}
+}
+static void redisplay_unmap_subwindows_except_us (struct frame* f, int x, int y, int width,
+						  int height, Lisp_Object subwindow)
+{
+if (Dynarr_length (FRAME_SUBWINDOW_CACHE (f)))
+{
+redisplay_unmap_subwindows (f, x, y, width, height, subwindow);
 }
 }
 /****************************************************************************
 redisplay_output_subwindow
 output a subwindow.  This code borrows heavily from the pixmap stuff,
 although is much simpler not needing to account for partial
 pixmaps, backgrounds etc.
 ****************************************************************************/
 void
-redisplay_output_subwindow (struct window *w, struct display_line *dl,
+redisplay_output_subwindow (struct window *w,
-			    Lisp_Object image_instance, int xpos, int xoffset,
+			    Lisp_Object image_instance,
-			    int start_pixpos, int width, face_index findex,
+			    struct display_box* db, struct display_glyph_area* dga,
-			    int cursor_start, int cursor_width, int cursor_height)
+			    face_index findex, int cursor_start, int cursor_width,
+			    int cursor_height)
 {
 struct Lisp_Image_Instance *p = XIMAGE_INSTANCE (image_instance);
 Lisp_Object window;
+struct display_glyph_area sdga;
-int lheight = dl->ascent + dl->descent - dl->clip;
-int pheight = ((int) IMAGE_INSTANCE_SUBWINDOW_HEIGHT (p) > lheight ? lheight :
+dga->height = IMAGE_INSTANCE_SUBWINDOW_HEIGHT (p);
-		 IMAGE_INSTANCE_SUBWINDOW_HEIGHT (p));
+dga->width = IMAGE_INSTANCE_SUBWINDOW_WIDTH (p);
+/* This makes the glyph area fit into the display area. */
+if (!redisplay_normalize_glyph_area (db, dga))
+return;
 XSETWINDOW (window, w);
-/* Clear the area the subwindow is going into.  The subwindow itself
+/* Clear the area the subwindow is going into. */
-will always take care of the full width.  We don't want to clear
+redisplay_clear_clipped_region (window, findex,
-where it is going to go in order to avoid flicker.  So, all we
+				  db, dga, 0, image_instance);
-have to take care of is any area above or below the subwindow. Of
-course this is rubbish if the subwindow has transparent areas
+/* This shrinks the display box to exactly enclose the glyph
-(for instance with frames). */
+area. */
-/* #### We take a shortcut for now.  We know that since we have
+redisplay_normalize_display_box (db, dga);
-subwindow_offset hardwired to 0 that the subwindow is against the top
-edge so all we have to worry about is below it. */
+/* if we can't view the whole window we can't view any of it. We
-if ((int) (dl->ypos - dl->ascent + pheight) <
+have to be careful here since we may be being asked to display
-(int) (dl->ypos + dl->descent - dl->clip))
+part of a subwindow, the rest of which is on-screen as well. We
-{
+need to allow this case and map the entire subwindow. We also
-int clear_x, clear_width;
+need to be careful since the subwindow could be outside the
+window in the gutter or modeline - we also need to allow these
-int clear_y = dl->ypos - dl->ascent + pheight;
+cases.*/
-int clear_height = lheight - pheight;
+sdga.xoffset = -dga->xoffset;
+sdga.yoffset = -dga->yoffset;
-if (start_pixpos >= 0 && start_pixpos > xpos)
+sdga.height = IMAGE_INSTANCE_SUBWINDOW_HEIGHT (p);
-	{
+sdga.width = IMAGE_INSTANCE_SUBWINDOW_WIDTH (p);
-	  clear_x = start_pixpos;
-	  clear_width = xpos + width - start_pixpos;
+if (redisplay_display_boxes_in_window_p (w, db, &sdga) < 0)
-	}
+{
-else
+map_subwindow (image_instance, db->xpos, db->ypos, dga);
-	{
+}
-	  clear_x = xpos;
+else
-	  clear_width = width;
+{
-	}
+sdga.xoffset = sdga.yoffset = 0;
+map_subwindow (image_instance, db->xpos - dga->xoffset,
-redisplay_clear_region (window, findex, clear_x, clear_y,
+		     db->ypos - dga->yoffset, &sdga);
-			      clear_width, clear_height);
+}
 }
-#if 0
-redisplay_clear_region (window, findex, xpos - xoffset, dl->ypos - dl->ascent,
+/****************************************************************************
-			  width, lheight);
+redisplay_output_layout
-#endif
-/* if we can't view the whole window we can't view any of it */
+Output a widget hierarchy. This can safely call itself recursively.
-if (IMAGE_INSTANCE_SUBWINDOW_HEIGHT (p) > lheight
+****************************************************************************/
-||
+void
-IMAGE_INSTANCE_SUBWINDOW_WIDTH (p) > width)
+redisplay_output_layout (struct window *w,
-{
+			 Lisp_Object image_instance,
-redisplay_clear_region (window, findex, xpos - xoffset, dl->ypos - dl->ascent,
+			 struct display_box* db, struct display_glyph_area* dga,
-			      width, lheight);
+			 face_index findex, int cursor_start, int cursor_width,
-unmap_subwindow (image_instance);
+			 int cursor_height)
-}
+{
-else
+struct Lisp_Image_Instance *p = XIMAGE_INSTANCE (image_instance);
-map_subwindow (image_instance, xpos - xoffset, dl->ypos - dl->ascent);
+Lisp_Object window, rest;
+Emchar_dynarr *buf = Dynarr_new (Emchar);
+struct frame *f = XFRAME (w->frame);
+struct device *d = XDEVICE (f->device);
+int layout_height, layout_width;
+/* We bogusly don't take f->extents_changed and f->glyphs_changed
+into account. This is because if we do we always redisplay the
+entire layout. So far I have seen no ill effects to we'll see. */
+int frame_changed = (f->buffers_changed ||
+		       f->clip_changed ||
+		       f->faces_changed    ||
+		       f->frame_changed    ||
+		       f->modeline_changed ||
+		       f->subwindows_changed ||
+		       f->windows_changed ||
+		       f->windows_structure_changed);
+XSETWINDOW (window, w);
+layout_height = glyph_height (image_instance, Qnil, findex, window);
+layout_width = glyph_width (image_instance, Qnil, findex, window);
+dga->height = layout_height;
+dga->width = layout_width;
+/* This makes the glyph area fit into the display area. */
+if (!redisplay_normalize_glyph_area (db, dga))
+return;
+/* Highly dodgy optimization. We want to only output the whole
+layout if we really have to. */
+if (frame_changed || IMAGE_INSTANCE_DIRTYP (p))
+{
+/* First clear the area we are drawing into. This is the easiest
+	 thing to do since we have many gaps that we have to make sure are
+	 filled in. */
+redisplay_clear_clipped_region (window, findex, db, dga, 1, Qnil);
+/* Output a border if required */
+if (!NILP (IMAGE_INSTANCE_LAYOUT_BORDER (p)))
+	{
+	  int edges = 0;
+	  enum edge_style style;
+	  int ypos = db->ypos;
+	  int height = dga->height;
+	  if (dga->xoffset >= 0)
+	    edges |= EDGE_LEFT;
+	  if (dga->width - dga->xoffset == layout_width)
+	    edges |= EDGE_RIGHT;
+	  if (dga->yoffset >= 0)
+	    edges |= EDGE_TOP;
+	  if (dga->height - dga->yoffset == layout_height)
+	    edges |= EDGE_BOTTOM;
+	  if (EQ (IMAGE_INSTANCE_LAYOUT_BORDER (p), Qetched_in))
+	    style = EDGE_ETCHED_IN;
+	  else if (EQ (IMAGE_INSTANCE_LAYOUT_BORDER (p), Qetched_out))
+	    style = EDGE_ETCHED_OUT;
+	  else if (EQ (IMAGE_INSTANCE_LAYOUT_BORDER (p), Qbevel_in))
+	    style = EDGE_BEVEL_IN;
+	  else if (INTP (IMAGE_INSTANCE_LAYOUT_BORDER (p)))
+	    {
+	      style = EDGE_ETCHED_IN;
+	      if (edges & EDGE_TOP)
+		{
+		  ypos += XINT (IMAGE_INSTANCE_LAYOUT_BORDER (p));
+		  height -= XINT (IMAGE_INSTANCE_LAYOUT_BORDER (p));
+		}
+	    }
+	  else
+	    style = EDGE_BEVEL_OUT;
+	  MAYBE_DEVMETH (d, bevel_area,
+			 (w, findex, db->xpos,
+			  ypos,
+			  dga->width, height, 2, edges, style));
+	}
+}
+/* This shrinks the display box to exactly enclose the glyph
+area. */
+redisplay_normalize_display_box (db, dga);
+/* Flip through the widgets in the layout displaying as necessary */
+LIST_LOOP (rest, IMAGE_INSTANCE_LAYOUT_CHILDREN (p))
+{
+Lisp_Object child = XCAR (rest);
+struct display_box cdb;
+/* For losing HP-UX */
+cdb.xpos = db->xpos;
+cdb.ypos = db->ypos;
+cdb.width = db->width;
+cdb.height = db->height;
+/* First determine if the image is visible at all */
+if (IMAGE_INSTANCEP (child))
+	{
+	  struct Lisp_Image_Instance* childii = XIMAGE_INSTANCE (child);
+	  /* The enclosing layout offsets are +ve at this point */
+	  struct display_glyph_area cdga;
+	  cdga.xoffset  = IMAGE_INSTANCE_XOFFSET (childii) - dga->xoffset;
+	  cdga.yoffset = IMAGE_INSTANCE_YOFFSET (childii) - dga->yoffset;
+	  cdga.width = glyph_width (child, Qnil, findex, window);
+	  cdga.height = glyph_height (child, Qnil, findex, window);
+	  /* Although normalization is done by the output routines
+	     we have to do it here so that they don't try and
+	     clear all of db. This is true below also. */
+	  if (redisplay_normalize_glyph_area (&cdb, &cdga))
+	    {
+	      redisplay_normalize_display_box (&cdb, &cdga);
+	      /* Since the display boxes will now be totally in the
+		 window if they are visible at all we can now check this easily. */
+	      if (cdb.xpos < db->xpos || cdb.ypos < db->ypos
+		  || cdb.xpos + cdb.width > db->xpos + db->width
+		  || cdb.ypos + cdb.height > db->ypos + db->height)
+		continue;
+	      /* We have to invert the offset here as normalization
+		 will have made them positive which the output
+		 routines will treat as a truely +ve offset. */
+	      cdga.xoffset = -cdga.xoffset;
+	      cdga.yoffset = -cdga.yoffset;
+	      switch (IMAGE_INSTANCE_TYPE (childii))
+		{
+		case IMAGE_TEXT:
+		  {
+		    /* #### This is well hacked and could use some
+		       generalisation.*/
+		    if (redisplay_normalize_glyph_area (&cdb, &cdga)
+			&&
+			(frame_changed || IMAGE_INSTANCE_DIRTYP (childii)))
+		      {
+			struct display_line dl;	/* this is fake */
+			Lisp_Object string =
+			  IMAGE_INSTANCE_TEXT_STRING (childii);
+			convert_bufbyte_string_into_emchar_dynarr
+			  (XSTRING_DATA (string), XSTRING_LENGTH (string), buf);
+			redisplay_normalize_display_box (&cdb, &cdga);
+			/* Offsets are now +ve again so be careful
+			   when fixing up the display line. */
+			xzero (dl);
+			/* Munge boxes into display lines. */
+			dl.ypos = (cdb.ypos - cdga.yoffset)
+			  + glyph_ascent (child, Qnil, findex, window);
+			dl.ascent = glyph_ascent (child, Qnil, findex, window);
+			dl.descent = glyph_descent (child, Qnil, findex, window);
+			dl.top_clip = cdga.yoffset;
+			dl.clip = (dl.ypos + dl.descent) - (cdb.ypos + cdb.height);
+			/* output_string doesn't understand offsets in
+			   the same way as other routines - we have to
+			   add the offset to the width so that we
+			   output the full string. */
+			MAYBE_DEVMETH (d, output_string, (w, &dl, buf, cdb.xpos,
+							  cdga.xoffset, cdb.xpos,
+							  cdga.width + cdga.xoffset,
+							  findex, 0, 0, 0, 0));
+			Dynarr_reset (buf);
+		      }
+		  }
+		  break;
+		case IMAGE_MONO_PIXMAP:
+		case IMAGE_COLOR_PIXMAP:
+		  if (frame_changed || IMAGE_INSTANCE_DIRTYP (childii))
+		    redisplay_output_pixmap (w, child, &cdb, &cdga, findex,
+					     0, 0, 0, 0);
+		  break;
+		case IMAGE_WIDGET:
+		case IMAGE_SUBWINDOW:
+		  if (frame_changed || IMAGE_INSTANCE_DIRTYP (childii))
+		    redisplay_output_subwindow (w, child, &cdb, &cdga, findex,
+						0, 0, 0);
+		  break;
+		case IMAGE_LAYOUT:
+		  redisplay_output_layout (w, child, &cdb, &cdga, findex,
+					   0, 0, 0);
+		  break;
+		case IMAGE_NOTHING:
+		  /* nothing is as nothing does */
+		  break;
+		case IMAGE_POINTER:
+		default:
+		  abort ();
+		}
+	    }
+	}
+}
+Dynarr_free (buf);
+}
+/****************************************************************************
+redisplay_output_pixmap
+output a pixmap.
+****************************************************************************/
+void
+redisplay_output_pixmap (struct window *w,
+			 Lisp_Object image_instance,
+			 struct display_box* db, struct display_glyph_area* dga,
+			 face_index findex, int cursor_start, int cursor_width,
+			 int cursor_height, int offset_bitmap)
+{
+struct frame *f = XFRAME (w->frame);
+struct device *d = XDEVICE (f->device);
+struct Lisp_Image_Instance *p = XIMAGE_INSTANCE (image_instance);
+Lisp_Object window;
+XSETWINDOW (window, w);
+dga->height = IMAGE_INSTANCE_PIXMAP_HEIGHT (p);
+dga->width = IMAGE_INSTANCE_PIXMAP_WIDTH (p);
+/* This makes the glyph area fit into the display area. */
+if (!redisplay_normalize_glyph_area (db, dga))
+return;
+/* Clear the area the pixmap is going into.  The pixmap itself will
+always take care of the full width.  We don't want to clear where
+it is going to go in order to avoid flicker.  So, all we have to
+take care of is any area above or below the pixmap. If the pixmap
+has a mask in which case we have to clear the whole damn thing
+since we can't yet clear just the area not included in the
+mask. */
+if (!offset_bitmap)
+{
+redisplay_clear_clipped_region (window, findex,
+				      db, dga,
+				      (int)IMAGE_INSTANCE_PIXMAP_MASK (p),
+				      Qnil);
+/* This shrinks the display box to exactly enclose the glyph
+	 area. */
+redisplay_normalize_display_box (db, dga);
+}
+assert (db->xpos >= 0 && db->ypos >= 0);
+MAYBE_DEVMETH (d, output_pixmap, (w, image_instance,
+				    db, dga,
+				    findex, cursor_start,
+				    cursor_width, cursor_height,
+				    offset_bitmap));
 }
 /****************************************************************************
 redisplay_clear_region
 abort ();
 d = XDEVICE (f->device);
 /* if we have subwindows in the region we have to unmap them */
-if (Dynarr_length (FRAME_SUBWINDOW_CACHE (f)))
+redisplay_unmap_subwindows_maybe (f, x, y, width, height);
-{
-redisplay_unmap_subwindows (f, x, y, width, height);
-}
 /* #### This isn't quite right for when this function is called
 from the toolbar code. */
 /* Don't use a backing pixmap in the border area */
 DEVMETH (d, clear_region,
 	   (locale, d, f, findex, x, y, width, height, fcolor, bcolor, background_pixmap));
 }
+/****************************************************************************
+redisplay_clear_clipped_region
+Clear the area in the dest display_box not covered by the src
+display_glyph_area using the given face. This is a common occurance
+for images shorter than the display line. Clipping can be played
+around with by altering these. glyphsrc should be normalized.
+****************************************************************************/
+static void
+redisplay_clear_clipped_region (Lisp_Object window, face_index findex,
+	struct display_box* dest, struct display_glyph_area* glyphsrc,
+	int fullheight_p, Lisp_Object ignored_subwindow)
+{
+/* assume dest->xpos >= 0 */
+int clear_x;
+struct frame* f = XFRAME (XWINDOW (window)->frame);
+if (glyphsrc->xoffset > 0)
+{
+clear_x = dest->xpos + glyphsrc->xoffset;
+}
+else
+{
+clear_x = dest->xpos;
+}
+/* If we need the whole height cleared then just do it. */
+if (fullheight_p)
+{
+redisplay_clear_region (window, findex, clear_x, dest->ypos,
+			      glyphsrc->width, dest->height);
+}
+else
+{
+int yoffset = (glyphsrc->yoffset > 0 ? glyphsrc->yoffset : 0);
+/* We need to make sure that subwindows are unmapped from the
+whole area. */
+redisplay_unmap_subwindows_except_us (f, clear_x, dest->ypos,
+					    glyphsrc->width, dest->height,
+					    ignored_subwindow);
+/* first the top box */
+if (yoffset > 0)
+	{
+	  redisplay_clear_region (window, findex, clear_x, dest->ypos,
+				  glyphsrc->width, yoffset);
+	}
+/* Then the bottom box */
+if (yoffset + glyphsrc->height < dest->height)
+	{
+	  redisplay_clear_region (window, findex, clear_x,
+				  dest->ypos + yoffset + glyphsrc->height,
+				  glyphsrc->width,
+				  dest->height - (yoffset + glyphsrc->height));
+	}
+}
+}
+/*****************************************************************************
+redisplay_normalize_glyph_area
+redisplay_normalize_display_box
+Calculate the visible box for displaying src in dest.
+****************************************************************************/
+int
+redisplay_normalize_glyph_area (struct display_box* dest,
+				struct display_glyph_area* glyphsrc)
+{
+if (dest->xpos + glyphsrc->xoffset > dest->xpos + dest->width
+||
+dest->ypos + glyphsrc->yoffset > dest->ypos + dest->height
+||
+-glyphsrc->xoffset >= glyphsrc->width
+||
+-glyphsrc->yoffset >= glyphsrc->height)
+{
+/* It's all clipped out */
+return 0;
+}
+/* Horizontal offsets. This works because xoffset can be -ve as well as +ve */
+if (dest->xpos + glyphsrc->xoffset + glyphsrc->width > dest->xpos + dest->width)
+{
+if (glyphsrc->xoffset > 0)
+	glyphsrc->width = dest->width - glyphsrc->xoffset;
+else
+	glyphsrc->width = dest->width;
+}
+if (glyphsrc->xoffset < 0)
+glyphsrc->width += glyphsrc->xoffset;
+/* Vertical offsets. This works because yoffset can be -ve as well as +ve */
+if (dest->ypos + glyphsrc->yoffset + glyphsrc->height > dest->ypos + dest->height)
+{
+if (glyphsrc->yoffset > 0)
+	glyphsrc->height = dest->height - glyphsrc->yoffset;
+else
+	glyphsrc->height = dest->height;
+}
+if (glyphsrc->yoffset < 0)
+glyphsrc->height += glyphsrc->yoffset;
+return 1;
+}
+static void
+redisplay_normalize_display_box (struct display_box* dest,
+				 struct display_glyph_area* glyphsrc)
+{
+/* Adjust the destination area. At the end of this the destination
+area will exactly enclose the glyph area. The only remaining
+adjustment will be offsets into the glyph area. */
+/* Horizontal adjustment. */
+if (glyphsrc->xoffset > 0)
+{
+dest->xpos += glyphsrc->xoffset;
+dest->width -= glyphsrc->xoffset;
+glyphsrc->xoffset = 0;
+}
+else
+glyphsrc->xoffset = -glyphsrc->xoffset;
+if (glyphsrc->width < dest->width)
+dest->width = glyphsrc->width;
+/* Vertical adjustment. */
+if (glyphsrc->yoffset > 0)
+{
+dest->ypos += glyphsrc->yoffset;
+dest->height -= glyphsrc->yoffset;
+glyphsrc->yoffset = 0;
+}
+else
+glyphsrc->yoffset = -glyphsrc->yoffset;
+if (glyphsrc->height < dest->height)
+dest->height = glyphsrc->height;
+}
+/*****************************************************************************
+redisplay_display_boxes_in_window_p
+Determine whether the require display_glyph_area is completely inside
+the window. 0 means the display_box is not in the window. 1 means the
+display_box and the display_glyph_area are in the window. -1 means
+the display_box is in the window but the display_glyph_area is not.
+****************************************************************************/
+static int
+redisplay_display_boxes_in_window_p (struct window* w,
+				     struct display_box* db,
+				     struct display_glyph_area* dga)
+{
+int left = WINDOW_TEXT_LEFT (w);
+int right = WINDOW_TEXT_RIGHT (w);
+int top = WINDOW_TEXT_TOP (w);
+int bottom = WINDOW_TEXT_BOTTOM (w);
+if (db->xpos < left || db->ypos < top
+|| db->xpos + db->width > right
+|| db->ypos + db->height > bottom)
+/* We are not displaying in a window at all */
+return 0;
+if (db->xpos + dga->xoffset >= left
+&&
+db->ypos + dga->yoffset >= top
+&&
+db->xpos + dga->xoffset + dga->width <= right
+&&
+db->ypos + dga->yoffset + dga->height <= bottom)
+return 1;
+return -1;
+}
+/*****************************************************************************
+redisplay_calculate_display_boxes
+Convert from rune/display_line co-ordinates to display_box
+co-ordinates.
+****************************************************************************/
+int
+redisplay_calculate_display_boxes (struct display_line *dl, int xpos,
+				   int xoffset, int start_pixpos, int width,
+				   struct display_box* dest,
+				   struct display_glyph_area* src)
+{
+dest->xpos = xpos;
+dest->ypos = DISPLAY_LINE_YPOS (dl);
+dest->width = width;
+dest->height = DISPLAY_LINE_HEIGHT (dl);
+src->xoffset = -xoffset;
+src->yoffset = -dl->top_clip;
+src->width = 0;
+src->height = 0;
+if (start_pixpos >=0 && start_pixpos > xpos)
+{
+/* Oops, we're asking for a start outside of the displayable
+area. */
+if (start_pixpos > xpos + width)
+	return 0;
+dest->xpos = start_pixpos;
+dest->width -= (start_pixpos - xpos);
+/* Offsets are -ve when we want to clip pixels off the displayed
+glyph. */
+src->xoffset -= (start_pixpos - xpos);
+}
+return 1;
+}
 /*****************************************************************************
 redisplay_clear_top_of_window
 If window is topmost, clear the internal border above it.
 ****************************************************************************/
 {
 int height = ypos2 - ypos1;
 if (height)
 	{
-	  struct frame *f = XFRAME (w->frame);
 	  Lisp_Object window;
 	  int bflag = 0 ; /* (window_needs_vertical_divider (w) ? 0 : 1);*/
 	  layout_bounds bounds;
 	  bounds = calculate_display_line_boundaries (w, bflag);
 void
 redisplay_clear_bottom_of_window (struct window *w, display_line_dynarr *ddla,
 				  int min_start, int max_end)
 {
 struct frame *f = XFRAME (w->frame);
-struct device *d = XDEVICE (f->device);
 int ypos1, ypos2;
 int ddla_len = Dynarr_length (ddla);
 ypos2 = WINDOW_TEXT_BOTTOM (w);
 #ifdef HAVE_SCROLLBARS
 {
 struct frame *f = XFRAME (w->frame);
 struct device *d = XDEVICE (f->device);
 int x, y, width, height;
 int shadow_thickness = MODELINE_SHADOW_THICKNESS (w);
+enum edge_style style;
 x = WINDOW_MODELINE_LEFT (w);
 width = WINDOW_MODELINE_RIGHT (w) - x;
 y = dl->ypos - dl->ascent - shadow_thickness;
 height = dl->ascent + dl->descent + 2 * shadow_thickness;
 if (XINT (w->modeline_shadow_thickness) < 0)
-shadow_thickness = - shadow_thickness;
+{
+style = EDGE_BEVEL_IN;
+}
+else
+{
+style = EDGE_BEVEL_OUT;
+}
 MAYBE_DEVMETH (d, bevel_area,
-		 (w, MODELINE_INDEX, x, y, width, height, shadow_thickness));
+		 (w, MODELINE_INDEX, x, y, width, height, shadow_thickness,
-}
+		  EDGE_ALL, style));
+}

Mercurial > hg > xemacs-beta

comparison src/redisplay-output.c @ 424:11054d720c21 r21-2-20