rnd-20040221-1-src
[rocksndiamonds.git] / src / editor.c
index 9cd163a506eb7891c9f726b2606432424f655804..4a96432c60557924e851baadb885314699ea13b3 100644 (file)
 #define ED_SETTINGS_YOFFSET            (3 * MINI_TILEY / 2)
 
 #define ED_SETTINGS_XPOS(n)            (ED_SETTINGS_XSTART + \
-                                        n * ED_SETTINGS_XOFFSET)
+                                        (n) * ED_SETTINGS_XOFFSET)
 #define ED_SETTINGS_YPOS(n)            (ED_SETTINGS_YSTART + \
-                                        n * ED_SETTINGS_YOFFSET)
+                                        (n) * ED_SETTINGS_YOFFSET)
 
 #define ED_SETTINGS1_YPOS              MINI_TILEY
 #define ED_SETTINGS2_XPOS              MINI_TILEX
 #define ED_COUNTER_YSTART              (ED_SETTINGS1_YPOS + 2 * TILEY)
 #define ED_COUNTER_YDISTANCE           (3 * MINI_TILEY)
 #define ED_COUNTER_YPOS(n)             (ED_COUNTER_YSTART + \
-                                        n * ED_COUNTER_YDISTANCE)
+                                        (n) * ED_COUNTER_YDISTANCE)
 #define ED_COUNTER2_YPOS(n)            (ED_COUNTER_YSTART + \
-                                        n * ED_COUNTER_YDISTANCE - 2)
+                                        (n) * ED_COUNTER_YDISTANCE - 2)
 
 /* values for element content drawing areas */
 /* amoeba content */
 
 /* yamyam content */
 #define ED_AREA_YAMYAM_CONTENT_XPOS(n) (2 * MINI_TILEX + \
-                                        5 * (n % 4) * MINI_TILEX)
-#define ED_AREA_YAMYAM_CONTENT_YPOS(n) (22 * MINI_TILEY + \
-                                        6 * (n / 4) * MINI_TILEY)
+                                        5 * ((n) % 4) * MINI_TILEX)
+#define ED_AREA_YAMYAM_CONTENT_YPOS(n) (17 * MINI_TILEY + \
+                                        6 * ((n) / 4) * MINI_TILEY)
 
 /* custom change target */
 #define ED_AREA_ELEM_CONTENT2_YPOS     (ED_SETTINGS_YPOS(1) + \
 #define GADGET_ID_GRAVITY              (GADGET_ID_CHECKBUTTON_FIRST + 4)
 #define GADGET_ID_STICK_ELEMENT                (GADGET_ID_CHECKBUTTON_FIRST + 5)
 #define GADGET_ID_EM_SLIPPERY_GEMS     (GADGET_ID_CHECKBUTTON_FIRST + 6)
-#define GADGET_ID_BLOCK_LAST_FIELD     (GADGET_ID_CHECKBUTTON_FIRST + 7)
-#define GADGET_ID_SP_BLOCK_LAST_FIELD  (GADGET_ID_CHECKBUTTON_FIRST + 8)
-#define GADGET_ID_CUSTOM_EXPLODE_RESULT        (GADGET_ID_CHECKBUTTON_FIRST + 9)
-#define GADGET_ID_CUSTOM_EXPLODE_FIRE  (GADGET_ID_CHECKBUTTON_FIRST + 10)
-#define GADGET_ID_CUSTOM_EXPLODE_SMASH (GADGET_ID_CHECKBUTTON_FIRST + 11)
-#define GADGET_ID_CUSTOM_EXPLODE_IMPACT        (GADGET_ID_CHECKBUTTON_FIRST + 12)
-#define GADGET_ID_CUSTOM_WALK_TO_OBJECT        (GADGET_ID_CHECKBUTTON_FIRST + 13)
-#define GADGET_ID_CUSTOM_DEADLY                (GADGET_ID_CHECKBUTTON_FIRST + 14)
-#define GADGET_ID_CUSTOM_CAN_MOVE      (GADGET_ID_CHECKBUTTON_FIRST + 15)
-#define GADGET_ID_CUSTOM_CAN_FALL      (GADGET_ID_CHECKBUTTON_FIRST + 16)
-#define GADGET_ID_CUSTOM_CAN_SMASH     (GADGET_ID_CHECKBUTTON_FIRST + 17)
-#define GADGET_ID_CUSTOM_SLIPPERY      (GADGET_ID_CHECKBUTTON_FIRST + 18)
-#define GADGET_ID_CUSTOM_ACCESSIBLE    (GADGET_ID_CHECKBUTTON_FIRST + 19)
-#define GADGET_ID_CUSTOM_USE_GRAPHIC   (GADGET_ID_CHECKBUTTON_FIRST + 20)
-#define GADGET_ID_CUSTOM_USE_TEMPLATE  (GADGET_ID_CHECKBUTTON_FIRST + 21)
-#define GADGET_ID_CUSTOM_CAN_CHANGE    (GADGET_ID_CHECKBUTTON_FIRST + 22)
-#define GADGET_ID_CHANGE_USE_CONTENT   (GADGET_ID_CHECKBUTTON_FIRST + 23)
-#define GADGET_ID_CHANGE_USE_EXPLOSION (GADGET_ID_CHECKBUTTON_FIRST + 24)
-#define GADGET_ID_CHANGE_ONLY_COMPLETE (GADGET_ID_CHECKBUTTON_FIRST + 25)
-#define GADGET_ID_CHANGE_USE_RANDOM    (GADGET_ID_CHECKBUTTON_FIRST + 26)
-#define GADGET_ID_CHANGE_DELAY         (GADGET_ID_CHECKBUTTON_FIRST + 27)
-#define GADGET_ID_CHANGE_BY_DIRECT_ACT (GADGET_ID_CHECKBUTTON_FIRST + 28)
-#define GADGET_ID_CHANGE_BY_OTHER_ACT  (GADGET_ID_CHECKBUTTON_FIRST + 29)
+#define GADGET_ID_USE_SPRING_BUG       (GADGET_ID_CHECKBUTTON_FIRST + 7)
+#define GADGET_ID_BLOCK_LAST_FIELD     (GADGET_ID_CHECKBUTTON_FIRST + 8)
+#define GADGET_ID_SP_BLOCK_LAST_FIELD  (GADGET_ID_CHECKBUTTON_FIRST + 9)
+#define GADGET_ID_CAN_MOVE_INTO_ACID   (GADGET_ID_CHECKBUTTON_FIRST + 10)
+#define GADGET_ID_CUSTOM_EXPLODE_RESULT        (GADGET_ID_CHECKBUTTON_FIRST + 11)
+#define GADGET_ID_CUSTOM_EXPLODE_FIRE  (GADGET_ID_CHECKBUTTON_FIRST + 12)
+#define GADGET_ID_CUSTOM_EXPLODE_SMASH (GADGET_ID_CHECKBUTTON_FIRST + 13)
+#define GADGET_ID_CUSTOM_EXPLODE_IMPACT        (GADGET_ID_CHECKBUTTON_FIRST + 14)
+#define GADGET_ID_CUSTOM_WALK_TO_OBJECT        (GADGET_ID_CHECKBUTTON_FIRST + 15)
+#define GADGET_ID_CUSTOM_DEADLY                (GADGET_ID_CHECKBUTTON_FIRST + 16)
+#define GADGET_ID_CUSTOM_CAN_MOVE      (GADGET_ID_CHECKBUTTON_FIRST + 17)
+#define GADGET_ID_CUSTOM_CAN_FALL      (GADGET_ID_CHECKBUTTON_FIRST + 18)
+#define GADGET_ID_CUSTOM_CAN_SMASH     (GADGET_ID_CHECKBUTTON_FIRST + 19)
+#define GADGET_ID_CUSTOM_SLIPPERY      (GADGET_ID_CHECKBUTTON_FIRST + 20)
+#define GADGET_ID_CUSTOM_ACCESSIBLE    (GADGET_ID_CHECKBUTTON_FIRST + 21)
+#define GADGET_ID_CUSTOM_USE_GRAPHIC   (GADGET_ID_CHECKBUTTON_FIRST + 22)
+#define GADGET_ID_CUSTOM_USE_TEMPLATE  (GADGET_ID_CHECKBUTTON_FIRST + 23)
+#define GADGET_ID_CUSTOM_CAN_CHANGE    (GADGET_ID_CHECKBUTTON_FIRST + 24)
+#define GADGET_ID_CHANGE_USE_CONTENT   (GADGET_ID_CHECKBUTTON_FIRST + 25)
+#define GADGET_ID_CHANGE_USE_EXPLOSION (GADGET_ID_CHECKBUTTON_FIRST + 26)
+#define GADGET_ID_CHANGE_ONLY_COMPLETE (GADGET_ID_CHECKBUTTON_FIRST + 27)
+#define GADGET_ID_CHANGE_USE_RANDOM    (GADGET_ID_CHECKBUTTON_FIRST + 28)
+#define GADGET_ID_CHANGE_DELAY         (GADGET_ID_CHECKBUTTON_FIRST + 29)
+#define GADGET_ID_CHANGE_BY_DIRECT_ACT (GADGET_ID_CHECKBUTTON_FIRST + 30)
+#define GADGET_ID_CHANGE_BY_OTHER_ACT  (GADGET_ID_CHECKBUTTON_FIRST + 31)
 
 /* gadgets for buttons in element list */
-#define GADGET_ID_ELEMENTLIST_FIRST    (GADGET_ID_CHECKBUTTON_FIRST + 30)
+#define GADGET_ID_ELEMENTLIST_FIRST    (GADGET_ID_CHECKBUTTON_FIRST + 32)
 #define GADGET_ID_ELEMENTLIST_LAST     (GADGET_ID_ELEMENTLIST_FIRST +  \
                                        ED_NUM_ELEMENTLIST_BUTTONS - 1)
 
 #define ED_CHECKBUTTON_ID_RANDOM_RESTRICTED    2
 #define ED_CHECKBUTTON_ID_STICK_ELEMENT                3
 #define ED_CHECKBUTTON_ID_EM_SLIPPERY_GEMS     4
-#define ED_CHECKBUTTON_ID_BLOCK_LAST_FIELD     5
-#define ED_CHECKBUTTON_ID_SP_BLOCK_LAST_FIELD  6
-#define ED_CHECKBUTTON_ID_CUSTOM_USE_GRAPHIC   7
-#define ED_CHECKBUTTON_ID_CUSTOM_USE_TEMPLATE  8
-#define ED_CHECKBUTTON_ID_CUSTOM_ACCESSIBLE    9
-#define ED_CHECKBUTTON_ID_CUSTOM_WALK_TO_OBJECT        10
-#define ED_CHECKBUTTON_ID_CUSTOM_CAN_MOVE      11
-#define ED_CHECKBUTTON_ID_CUSTOM_CAN_FALL      12
-#define ED_CHECKBUTTON_ID_CUSTOM_CAN_SMASH     13
-#define ED_CHECKBUTTON_ID_CUSTOM_SLIPPERY      14
-#define ED_CHECKBUTTON_ID_CUSTOM_DEADLY                15
-#define ED_CHECKBUTTON_ID_CUSTOM_EXPLODE_RESULT        16
-#define ED_CHECKBUTTON_ID_CUSTOM_EXPLODE_FIRE  17
-#define ED_CHECKBUTTON_ID_CUSTOM_EXPLODE_SMASH 18
-#define ED_CHECKBUTTON_ID_CUSTOM_EXPLODE_IMPACT        19
-#define ED_CHECKBUTTON_ID_CUSTOM_CAN_CHANGE    20
-#define ED_CHECKBUTTON_ID_CHANGE_DELAY         21
-#define ED_CHECKBUTTON_ID_CHANGE_BY_DIRECT_ACT 22
-#define ED_CHECKBUTTON_ID_CHANGE_BY_OTHER_ACT  23
-#define ED_CHECKBUTTON_ID_CHANGE_USE_EXPLOSION 24
-#define ED_CHECKBUTTON_ID_CHANGE_USE_CONTENT   25
-#define ED_CHECKBUTTON_ID_CHANGE_ONLY_COMPLETE 26
-#define ED_CHECKBUTTON_ID_CHANGE_USE_RANDOM    27
-
-#define ED_NUM_CHECKBUTTONS                    28
+#define ED_CHECKBUTTON_ID_USE_SPRING_BUG       5
+#define ED_CHECKBUTTON_ID_BLOCK_LAST_FIELD     6
+#define ED_CHECKBUTTON_ID_SP_BLOCK_LAST_FIELD  7
+#define ED_CHECKBUTTON_ID_CAN_MOVE_INTO_ACID   8
+#define ED_CHECKBUTTON_ID_CUSTOM_USE_GRAPHIC   9
+#define ED_CHECKBUTTON_ID_CUSTOM_USE_TEMPLATE  10
+#define ED_CHECKBUTTON_ID_CUSTOM_ACCESSIBLE    11
+#define ED_CHECKBUTTON_ID_CUSTOM_WALK_TO_OBJECT        12
+#define ED_CHECKBUTTON_ID_CUSTOM_CAN_MOVE      13
+#define ED_CHECKBUTTON_ID_CUSTOM_CAN_FALL      14
+#define ED_CHECKBUTTON_ID_CUSTOM_CAN_SMASH     15
+#define ED_CHECKBUTTON_ID_CUSTOM_SLIPPERY      16
+#define ED_CHECKBUTTON_ID_CUSTOM_DEADLY                17
+#define ED_CHECKBUTTON_ID_CUSTOM_EXPLODE_RESULT        18
+#define ED_CHECKBUTTON_ID_CUSTOM_EXPLODE_FIRE  19
+#define ED_CHECKBUTTON_ID_CUSTOM_EXPLODE_SMASH 20
+#define ED_CHECKBUTTON_ID_CUSTOM_EXPLODE_IMPACT        21
+#define ED_CHECKBUTTON_ID_CUSTOM_CAN_CHANGE    22
+#define ED_CHECKBUTTON_ID_CHANGE_DELAY         23
+#define ED_CHECKBUTTON_ID_CHANGE_BY_DIRECT_ACT 24
+#define ED_CHECKBUTTON_ID_CHANGE_BY_OTHER_ACT  25
+#define ED_CHECKBUTTON_ID_CHANGE_USE_EXPLOSION 26
+#define ED_CHECKBUTTON_ID_CHANGE_USE_CONTENT   27
+#define ED_CHECKBUTTON_ID_CHANGE_ONLY_COMPLETE 28
+#define ED_CHECKBUTTON_ID_CHANGE_USE_RANDOM    29
+
+#define ED_NUM_CHECKBUTTONS                    30
 
 #define ED_CHECKBUTTON_ID_LEVEL_FIRST  ED_CHECKBUTTON_ID_DOUBLE_SPEED
 #define ED_CHECKBUTTON_ID_LEVEL_LAST   ED_CHECKBUTTON_ID_RANDOM_RESTRICTED
@@ -943,7 +947,7 @@ static struct
     NULL,                              NULL, NULL
   },
   {
-    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(6),
+    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(3),
     MIN_ELEMENT_CONTENTS,              MAX_ELEMENT_CONTENTS,
     GADGET_ID_ELEMENT_CONTENT_DOWN,    GADGET_ID_ELEMENT_CONTENT_UP,
     GADGET_ID_ELEMENT_CONTENT_TEXT,    GADGET_ID_NONE,
@@ -1799,6 +1803,13 @@ static struct
     NULL,
     "slip down from certain flat walls","use EM style slipping behaviour"
   },
+  {
+    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(0),
+    GADGET_ID_USE_SPRING_BUG,          GADGET_ID_NONE,
+    &level.use_spring_bug,
+    NULL,
+    "use spring pushing bug",          "use odd spring pushing behaviour"
+  },
   {
     ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(0),
     GADGET_ID_BLOCK_LAST_FIELD,                GADGET_ID_NONE,
@@ -1807,12 +1818,19 @@ static struct
     "block last field when moving",    "player blocks last field when moving"
   },
   {
-    ED_SETTINGS_XPOS(0),               ED_COUNTER_YPOS(4),
+    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(0),
     GADGET_ID_SP_BLOCK_LAST_FIELD,     GADGET_ID_NONE,
     &level.sp_block_last_field,
     NULL,
     "block last field when moving",    "player blocks last field when moving"
   },
+  {
+    ED_SETTINGS_XPOS(0),               ED_SETTINGS_YPOS(0),
+    GADGET_ID_CAN_MOVE_INTO_ACID,      GADGET_ID_NONE,
+    &custom_element_properties[EP_CAN_MOVE_INTO_ACID],
+    NULL,
+    "can move into acid",              "element can move into acid pool"
+  },
 
   /* ---------- element settings: configure 1 (custom elements) ----------- */
 
@@ -2143,7 +2161,7 @@ static void DrawDrawingWindow();
 static void DrawLevelInfoWindow();
 static void DrawPropertiesWindow();
 static void UpdateCustomElementGraphicGadgets();
-static boolean checkPropertiesConfig();
+static boolean checkPropertiesConfig(int);
 static void CopyLevelToUndoBuffer(int);
 static void HandleDrawingAreas(struct GadgetInfo *);
 static void HandleCounterButtons(struct GadgetInfo *);
@@ -5073,10 +5091,14 @@ static void MapCheckbuttonGadget(int id)
   int x_right = gi->x + gi->width + xoffset_right;
   int y = gi->y + yoffset;
 
-  /* special case needed for "sticky" gadget */
-  ModifyGadget(gi, GDI_CHECKED, *checkbutton_info[id].value,
-              GDI_Y, SY + checkbutton_info[id].y, GDI_END);
-  y = gi->y + yoffset;
+  /* special case needed for "stickybutton" and "can move into acid" gadgets */
+  if (id == ED_CHECKBUTTON_ID_STICK_ELEMENT ||
+      id == ED_CHECKBUTTON_ID_CAN_MOVE_INTO_ACID)
+  {
+    ModifyGadget(gi, GDI_CHECKED, *checkbutton_info[id].value,
+                GDI_Y, SY + checkbutton_info[id].y, GDI_END);
+    y = gi->y + yoffset;
+  }
 
   if (checkbutton_info[id].text_left)
     DrawText(x_left, y, checkbutton_info[id].text_left, FONT_TEXT_1);
@@ -5640,12 +5662,26 @@ static void CopyGroupElementPropertiesToEditor(int element)
   custom_element = element_info[element];      /* needed for description */
 }
 
+static void CopyClassicElementPropertiesToEditor(int element)
+{
+  if (COULD_MOVE_INTO_ACID(element))
+  {
+    int bit_nr = get_special_property_bit(element, EP_CAN_MOVE_INTO_ACID);
+
+    if (bit_nr > -1)
+      custom_element_properties[EP_CAN_MOVE_INTO_ACID] =
+       ((level.can_move_into_acid & (1 << bit_nr)) != 0);
+  }
+}
+
 static void CopyElementPropertiesToEditor(int element)
 {
   if (IS_CUSTOM_ELEMENT(element))
     CopyCustomElementPropertiesToEditor(element);
   else if (IS_GROUP_ELEMENT(element))
     CopyGroupElementPropertiesToEditor(element);
+  else
+    CopyClassicElementPropertiesToEditor(element);
 }
 
 static void CopyCustomElementPropertiesToGame(int element)
@@ -5794,12 +5830,30 @@ static void CopyGroupElementPropertiesToGame(int element)
   element_info[element].modified_settings = TRUE;
 }
 
+static void CopyClassicElementPropertiesToGame(int element)
+{
+  if (COULD_MOVE_INTO_ACID(element))
+  {
+    int bit_nr = get_special_property_bit(element, EP_CAN_MOVE_INTO_ACID);
+
+    if (bit_nr > -1)
+    {
+      level.can_move_into_acid &= ~(1 << bit_nr);
+
+      if (custom_element_properties[EP_CAN_MOVE_INTO_ACID])
+       level.can_move_into_acid |= (1 << bit_nr);
+    }
+  }
+}
+
 static void CopyElementPropertiesToGame(int element)
 {
   if (IS_CUSTOM_ELEMENT(element))
     CopyCustomElementPropertiesToGame(element);
   else if (IS_GROUP_ELEMENT(element))
     CopyGroupElementPropertiesToGame(element);
+  else
+    CopyClassicElementPropertiesToGame(element);
 }
 
 void DrawLevelEd()
@@ -6564,19 +6618,23 @@ static struct
   { EL_DIAMOND,                &level.score[SC_DIAMOND],       TEXT_COLLECTING },
   { EL_CRYSTAL,                &level.score[SC_CRYSTAL],       TEXT_COLLECTING },
   { EL_PEARL,          &level.score[SC_PEARL],         TEXT_COLLECTING },
+  { EL_BUG,            &level.score[SC_BUG],           TEXT_SMASHING   },
   { EL_BUG_RIGHT,      &level.score[SC_BUG],           TEXT_SMASHING   },
   { EL_BUG_UP,         &level.score[SC_BUG],           TEXT_SMASHING   },
   { EL_BUG_LEFT,       &level.score[SC_BUG],           TEXT_SMASHING   },
   { EL_BUG_DOWN,       &level.score[SC_BUG],           TEXT_SMASHING   },
+  { EL_BD_BUTTERFLY,   &level.score[SC_BUG],           TEXT_SMASHING   },
   { EL_BD_BUTTERFLY_RIGHT,&level.score[SC_BUG],                TEXT_SMASHING   },
   { EL_BD_BUTTERFLY_UP,   &level.score[SC_BUG],                TEXT_SMASHING   },
   { EL_BD_BUTTERFLY_LEFT, &level.score[SC_BUG],                TEXT_SMASHING   },
   { EL_BD_BUTTERFLY_DOWN, &level.score[SC_BUG],                TEXT_SMASHING   },
   { EL_SP_ELECTRON,    &level.score[SC_BUG],           TEXT_SMASHING   },
+  { EL_SPACESHIP,      &level.score[SC_SPACESHIP],     TEXT_SMASHING   },
   { EL_SPACESHIP_RIGHT,        &level.score[SC_SPACESHIP],     TEXT_SMASHING   },
   { EL_SPACESHIP_UP,   &level.score[SC_SPACESHIP],     TEXT_SMASHING   },
   { EL_SPACESHIP_LEFT, &level.score[SC_SPACESHIP],     TEXT_SMASHING   },
   { EL_SPACESHIP_DOWN, &level.score[SC_SPACESHIP],     TEXT_SMASHING   },
+  { EL_BD_FIREFLY,     &level.score[SC_SPACESHIP],     TEXT_SMASHING   },
   { EL_BD_FIREFLY_RIGHT,&level.score[SC_SPACESHIP],    TEXT_SMASHING   },
   { EL_BD_FIREFLY_UP,  &level.score[SC_SPACESHIP],     TEXT_SMASHING   },
   { EL_BD_FIREFLY_LEFT, &level.score[SC_SPACESHIP],    TEXT_SMASHING   },
@@ -6585,6 +6643,7 @@ static struct
   { EL_YAMYAM,         &level.score[SC_YAMYAM],        TEXT_SMASHING   },
   { EL_DARK_YAMYAM,    &level.score[SC_YAMYAM],        TEXT_SMASHING   },
   { EL_ROBOT,          &level.score[SC_ROBOT],         TEXT_SMASHING   },
+  { EL_PACMAN,         &level.score[SC_PACMAN],        TEXT_SMASHING   },
   { EL_PACMAN_RIGHT,   &level.score[SC_PACMAN],        TEXT_SMASHING   },
   { EL_PACMAN_UP,      &level.score[SC_PACMAN],        TEXT_SMASHING   },
   { EL_PACMAN_LEFT,    &level.score[SC_PACMAN],        TEXT_SMASHING   },
@@ -6621,20 +6680,22 @@ static struct
   { -1,                        NULL,                           NULL            }
 };
 
-static boolean checkPropertiesConfig()
+static boolean checkPropertiesConfig(int element)
 {
   int i;
 
-  if (IS_GEM(properties_element) ||
-      IS_CUSTOM_ELEMENT(properties_element) ||
-      IS_GROUP_ELEMENT(properties_element) ||
-      IS_ENVELOPE(properties_element) ||
-      ELEM_IS_PLAYER(properties_element) ||
-      HAS_CONTENT(properties_element))
+  if (IS_GEM(element) ||
+      IS_CUSTOM_ELEMENT(element) ||
+      IS_GROUP_ELEMENT(element) ||
+      IS_ENVELOPE(element) ||
+      ELEM_IS_PLAYER(element) ||
+      HAS_CONTENT(element) ||
+      COULD_MOVE_INTO_ACID(element) ||
+      element == EL_SPRING)
     return TRUE;
   else
     for (i = 0; elements_with_counter[i].element != -1; i++)
-      if (elements_with_counter[i].element == properties_element)
+      if (elements_with_counter[i].element == element)
        return TRUE;
 
   return FALSE;
@@ -6644,7 +6705,7 @@ static void DrawPropertiesConfig()
 {
   int i;
 
-  if (!checkPropertiesConfig())
+  if (!checkPropertiesConfig(properties_element))
   {
     PrintInfoText("No configuration options available.", FONT_TEXT_1, 0);
 
@@ -6658,10 +6719,9 @@ static void DrawPropertiesConfig()
     {
       int counter_id = ED_COUNTER_ID_ELEMENT_SCORE;
 
-      if (HAS_CONTENT(properties_element))     /* needs stickybutton */
-       counterbutton_info[counter_id].y = ED_SETTINGS_YPOS(1);
-      else
-       counterbutton_info[counter_id].y = ED_SETTINGS_YPOS(0);
+      counterbutton_info[counter_id].y =
+       ED_SETTINGS_YPOS((HAS_CONTENT(properties_element) ? 1 : 0) +
+                        (COULD_MOVE_INTO_ACID(properties_element) ? 1 : 0));
 
       counterbutton_info[counter_id].value = elements_with_counter[i].value;
       counterbutton_info[counter_id].text_right= elements_with_counter[i].text;
@@ -6683,14 +6743,26 @@ static void DrawPropertiesConfig()
       DrawElementContentAreas();
   }
 
-  if (IS_GEM(properties_element))
-    MapCheckbuttonGadget(ED_CHECKBUTTON_ID_EM_SLIPPERY_GEMS);
-
   if (ELEM_IS_PLAYER(properties_element))
     MapCheckbuttonGadget(properties_element == EL_SP_MURPHY ?
                         ED_CHECKBUTTON_ID_SP_BLOCK_LAST_FIELD :
                         ED_CHECKBUTTON_ID_BLOCK_LAST_FIELD);
 
+  if (IS_GEM(properties_element))
+    MapCheckbuttonGadget(ED_CHECKBUTTON_ID_EM_SLIPPERY_GEMS);
+
+  if (COULD_MOVE_INTO_ACID(properties_element) &&
+      !IS_CUSTOM_ELEMENT(properties_element))
+  {
+    checkbutton_info[ED_CHECKBUTTON_ID_CAN_MOVE_INTO_ACID].y =
+      ED_SETTINGS_YPOS(HAS_CONTENT(properties_element) ? 1 : 0);
+
+    MapCheckbuttonGadget(ED_CHECKBUTTON_ID_CAN_MOVE_INTO_ACID);
+  }
+
+  if (properties_element == EL_SPRING)
+    MapCheckbuttonGadget(ED_CHECKBUTTON_ID_USE_SPRING_BUG);
+
   if (IS_ENVELOPE(properties_element))
   {
     int counter1_id = ED_COUNTER_ID_ENVELOPE_XSIZE;
@@ -8137,11 +8209,12 @@ static void HandleCheckbuttons(struct GadgetInfo *gi)
 
   *checkbutton_info[type_id].value ^= TRUE;
 
-  if (((type_id >= ED_CHECKBUTTON_ID_CUSTOM_FIRST &&
-       type_id <= ED_CHECKBUTTON_ID_CUSTOM_LAST) ||
-       (type_id >= ED_CHECKBUTTON_ID_CHANGE_FIRST &&
-       type_id <= ED_CHECKBUTTON_ID_CHANGE_LAST)) &&
-      type_id != ED_CHECKBUTTON_ID_CUSTOM_USE_TEMPLATE)
+  if (type_id == ED_CHECKBUTTON_ID_CAN_MOVE_INTO_ACID ||
+      (((type_id >= ED_CHECKBUTTON_ID_CUSTOM_FIRST &&
+        type_id <= ED_CHECKBUTTON_ID_CUSTOM_LAST) ||
+       (type_id >= ED_CHECKBUTTON_ID_CHANGE_FIRST &&
+        type_id <= ED_CHECKBUTTON_ID_CHANGE_LAST)) &&
+       type_id != ED_CHECKBUTTON_ID_CUSTOM_USE_TEMPLATE))
   {
     CopyElementPropertiesToGame(properties_element);
   }