From 19f7fa07f264e8dbc4483028068c1d900eec5474 Mon Sep 17 00:00:00 2001
From: Holger Schemel <info@artsoft.org>
Date: Wed, 24 Jun 2015 10:23:43 +0200
Subject: [PATCH] fixed (un)drawing special editor door when it is not
 appropriate

---
 src/tools.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/tools.c b/src/tools.c
index f76c8dce..5b830772 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -4437,6 +4437,29 @@ unsigned int MoveDoor(unsigned int door_state)
   return (door1 | door2);
 }
 
+static boolean useSpecialEditorDoor()
+{
+  int graphic = IMG_GLOBAL_BORDER_EDITOR;
+  boolean redefined = getImageListEntryFromImageID(graphic)->redefined;
+
+  // do not draw special editor door if editor border defined or redefined
+  if (graphic_info[graphic].bitmap != NULL || redefined)
+    return FALSE;
+
+  // do not draw special editor door if global border defined to be empty
+  if (graphic_info[IMG_GLOBAL_BORDER].bitmap == NULL)
+    return FALSE;
+
+  // do not draw special editor door if viewport definitions do not match
+  if (EX != VX ||
+      EY >= VY ||
+      EXSIZE != VXSIZE ||
+      EY + EYSIZE != VY + VYSIZE)
+    return FALSE;
+
+  return TRUE;
+}
+
 void DrawSpecialEditorDoor()
 {
   struct GraphicInfo *gfx1 = &graphic_info[IMG_DOOR_2_TOP_BORDER_CORRECTION];
@@ -4448,6 +4471,9 @@ void DrawSpecialEditorDoor()
   int vy = VY - outer_border;
   int exsize = EXSIZE + 2 * outer_border;
 
+  if (!useSpecialEditorDoor())
+    return;
+
   /* draw bigger level editor toolbox window */
   BlitBitmap(gfx1->bitmap, drawto, gfx1->src_x, gfx1->src_y,
 	     top_border_width, top_border_height, ex, ey - top_border_height);
@@ -4469,6 +4495,9 @@ void UndrawSpecialEditorDoor()
   int exsize = EXSIZE + 2 * outer_border;
   int eysize = EYSIZE + 2 * outer_border;
 
+  if (!useSpecialEditorDoor())
+    return;
+
   /* draw normal tape recorder window */
   if (graphic_info[IMG_GLOBAL_BORDER].bitmap)
   {
-- 
2.34.1