(J83-4862): Separate J90-4862 and JU+6249.

[chise/xemacs-chise.git] / src / redisplay-output.c

diff --git a/src/redisplay-output.c b/src/redisplay-output.c
index 6f2e65a..4396a8f 100644 (file)
--- a/src/redisplay-output.c
+++ b/src/redisplay-output.c
@@ -40,6 +40,7 @@ Boston, MA 02111-1307, USA.  */
 #include "glyphs.h"
 #include "redisplay.h"
 #include "faces.h"
+#include "gutter.h"
 
 static int compare_runes (struct window *w, struct rune *crb,
                          struct rune *drb);
@@ -181,7 +182,7 @@ sync_display_line_structs (struct window *w, int line, int do_blocks,
 /*****************************************************************************
  compare_runes
 
- Compare to runes to see if each of their fields is equal.  If so,
+ Compare two runes to see if each of their fields is equal.  If so,
  return true otherwise return false.
  ****************************************************************************/
 static int
@@ -1161,8 +1162,9 @@ redisplay_output_display_block (struct window *w, struct display_line *dl, int b
  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,
-                                       Lisp_Object ignored_window)
+static void
+redisplay_unmap_subwindows (struct frame* f, int x, int y, int width, int height,
+                           Lisp_Object ignored_window)
 {
   Lisp_Object rest;
 
@@ -1263,7 +1265,12 @@ redisplay_output_subwindow (struct window *w,
   sdga.height = IMAGE_INSTANCE_HEIGHT (p);
   sdga.width = IMAGE_INSTANCE_WIDTH (p);
 
-  if (redisplay_display_boxes_in_window_p (w, db, &sdga) < 0)
+  if (redisplay_display_boxes_in_window_p (w, db, &sdga) == 0
+      ||
+      /* We only want to do full subwindow display for windows that
+        are completely in the gutter, otherwise we must clip to be
+        safe. */
+      display_boxes_in_gutter_p (XFRAME (w->frame), db, &sdga) <= 0)
     {
       map_subwindow (image_instance, db->xpos, db->ypos, dga);
     }
@@ -1752,7 +1759,17 @@ redisplay_normalize_glyph_area (struct display_box* dest,
       ||
       -glyphsrc->xoffset >= glyphsrc->width
       ||
-      -glyphsrc->yoffset >= glyphsrc->height)
+      -glyphsrc->yoffset >= glyphsrc->height
+      ||
+      /* #### Not sure why this wasn't coped with before but normalizing
+        to zero width or height is definitely wrong. */
+      (dest->xpos + glyphsrc->xoffset + glyphsrc->width > dest->xpos + dest->width
+       &&
+       dest->width - glyphsrc->xoffset <= 0)
+      ||
+      (dest->ypos + glyphsrc->yoffset + glyphsrc->height > dest->ypos + dest->height
+       &&
+       dest->height - glyphsrc->yoffset <= 0))
     {
       /* It's all clipped out */
       return 0;
@@ -1823,9 +1840,9 @@ redisplay_normalize_display_box (struct display_box* dest,
 /*****************************************************************************
  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
+ Determine whether the required display_glyph_area is completely inside
+ the window. -1 means the display_box is not in the window. 1 means the
+ display_box and the display_glyph_area are in the window. 0 means
  the display_box is in the window but the display_glyph_area is not.
  ****************************************************************************/
 static int
@@ -1841,8 +1858,8 @@ redisplay_display_boxes_in_window_p (struct window* 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;
+      /* We are not displaying in a window at all */
+      return -1;
 
   if (db->xpos + dga->xoffset >= left
       &&
@@ -1853,7 +1870,7 @@ redisplay_display_boxes_in_window_p (struct window* w,
       db->ypos + dga->yoffset + dga->height <= bottom)
     return 1;
 
-  return -1;
+  return 0;
 }
 
 /*****************************************************************************
@@ -1899,7 +1916,7 @@ redisplay_calculate_display_boxes (struct display_line *dl, int xpos,
 
  If window is topmost, clear the internal border above it.
  ****************************************************************************/
-static void
+void
 redisplay_clear_top_of_window (struct window *w)
 {
   Lisp_Object window;
@@ -2264,7 +2281,7 @@ redisplay_output_window (struct window *w)
 
   /* If the window's structure has changed clear the internal border
      above it if it is topmost (the function will check). */
-  if (f->windows_structure_changed)
+  if (f->windows_structure_changed || f->faces_changed)
     redisplay_clear_top_of_window (w);
 
   /* Output each line. */