added highlighting single MM wall tiles in editor when pressing Alt key

diff --git a/src/editor.c b/src/editor.c
index abc0bc481497e165f9114ac7565e0a5a0c70861e..96bb61e3998c71c480d1590e94dc567dafab34c3 100644 (file)
--- a/src/editor.c
+++ b/src/editor.c
@@ -13320,29 +13320,69 @@ static void DrawAreaElementHighlight(boolean highlighted,
   {
     for (y = 0; y < ed_fieldy; y++)
     {
+      boolean highlight = FALSE;
       int lx = x + level_xpos;
       int ly = y + level_ypos;
 
       if (!IN_LEV_FIELD(lx, ly))
        continue;
 
-      if (Tile[lx][ly] != new_element1 &&
-         (!highlighted_similar ||
-          !strEqual(element_info[Tile[lx][ly]].class_name,
-                    element_info[new_element1].class_name)))
+      // check if element is the same
+      if (Tile[lx][ly] == new_element1)
+       highlight = TRUE;
+
+      // check if element is similar
+      if (highlighted_similar &&
+         strEqual(element_info[Tile[lx][ly]].class_name,
+                  element_info[new_element1].class_name))
+       highlight = TRUE;
+
+      // check if element is matching MM style wall
+      if (IS_MM_WALL(Tile[lx][ly]) &&
+         map_mm_wall_element(Tile[lx][ly]) == new_element1)
+       highlight = TRUE;
+
+      if (!highlight)
        continue;
 
-      int sx = SX + x * ed_tilesize;
-      int sy = SY + y * ed_tilesize;
-      int from_sx = sx;
-      int from_sy = sy;
-      int to_sx = sx + ed_tilesize - 1;
-      int to_sy = sy + ed_tilesize - 1;
-
-      DrawSimpleWhiteLine(drawto, from_sx, from_sy, to_sx,   from_sy);
-      DrawSimpleWhiteLine(drawto, to_sx,   from_sy, to_sx,   to_sy);
-      DrawSimpleWhiteLine(drawto, to_sx,   to_sy,   from_sx, to_sy);
-      DrawSimpleWhiteLine(drawto, from_sx, to_sy,   from_sx, from_sy);
+      if (IS_MM_WALL(Tile[lx][ly]) && !highlighted_similar)
+      {
+       int i;
+
+       for (i = 0; i < 4; i++)
+       {
+         if (!(MM_WALL_BITS(Tile[lx][ly]) & (1 << i)))
+           continue;
+
+         int xx = x * 2 + (i % 2);
+         int yy = y * 2 + (i / 2);
+         int sx = SX + xx * ed_tilesize / 2;
+         int sy = SY + yy * ed_tilesize / 2;
+         int from_sx = sx;
+         int from_sy = sy;
+         int to_sx = sx + ed_tilesize / 2 - 1;
+         int to_sy = sy + ed_tilesize / 2 - 1;
+
+         DrawSimpleWhiteLine(drawto, from_sx, from_sy, to_sx,   from_sy);
+         DrawSimpleWhiteLine(drawto, to_sx,   from_sy, to_sx,   to_sy);
+         DrawSimpleWhiteLine(drawto, to_sx,   to_sy,   from_sx, to_sy);
+         DrawSimpleWhiteLine(drawto, from_sx, to_sy,   from_sx, from_sy);
+       }
+      }
+      else
+      {
+       int sx = SX + x * ed_tilesize;
+       int sy = SY + y * ed_tilesize;
+       int from_sx = sx;
+       int from_sy = sy;
+       int to_sx = sx + ed_tilesize - 1;
+       int to_sy = sy + ed_tilesize - 1;
+
+       DrawSimpleWhiteLine(drawto, from_sx, from_sy, to_sx,   from_sy);
+       DrawSimpleWhiteLine(drawto, to_sx,   from_sy, to_sx,   to_sy);
+       DrawSimpleWhiteLine(drawto, to_sx,   to_sy,   from_sx, to_sy);
+       DrawSimpleWhiteLine(drawto, from_sx, to_sy,   from_sx, from_sy);
+      }
     }
   }
 }