Added support for being effects through the eAthena levelup message, and check

whether the being exists before referencing it. Re-enabled proper MP bar
display. Improved handling of a warp to the same map.

(patch by Fate)

(cherry picked from eAthena client, the part about the levelup message
doesn't apply, and we now seem to have a second "effect manager"...)

Conflicts:

	ChangeLog
	src/being.cpp
	src/being.h
	src/engine.cpp
	src/engine.h
	src/gui/ministatus.cpp
	src/net/beinghandler.cpp
	src/net/playerhandler.cpp
	src/net/protocol.h

2 files changed, 19 insertions, 3 deletions

diff --git a/src/net/beinghandler.cpp b/src/net/beinghandler.cpp
index 72371da5..f96cdcd5 100644
--- a/src/net/beinghandler.cpp
+++ b/src/net/beinghandler.cpp
@@ -32,6 +32,7 @@
 #include "../localplayer.h"
 #include "../log.h"
 #include "../main.h"
+#include "../npc.h"
 #include "../particle.h"
 #include "../sound.h"
 
@@ -268,7 +269,7 @@ void BeingHandler::handleBeingAttackMessage(MessageIn &msg)
     int attackType = msg.readInt8();
 
     if (!being) return;
-    
+
     switch (direction)
     {
         case DIRECTION_UP: being->setDirection(Being::UP); break;
@@ -347,3 +348,4 @@ void BeingHandler::handleBeingDirChangeMessage(MessageIn &msg)
        case DIRECTION_RIGHT: being->setDirection(Being::RIGHT); break;
     }
 }
+
diff --git a/src/net/playerhandler.cpp b/src/net/playerhandler.cpp
index ad271f15..beb59250 100644
--- a/src/net/playerhandler.cpp
+++ b/src/net/playerhandler.cpp
@@ -50,6 +50,11 @@ extern BuyDialog *buyDialog;
 extern SellDialog *sellDialog;
 extern Window *buySellDialog;
 
+/* Max. distance we are willing to scroll after a teleport;
+ * everything beyond will reset the port hard.
+ */
+static const int MAP_TELEPORT_SCROLL_DISTANCE = 8 * 32;
+
 /**
  * Listener used for handling the overweigth message.
  */
@@ -292,6 +297,7 @@ PlayerHandler::handleMapChangeMessage(MessageIn &msg)
     const std::string mapName = msg.readString();
     const unsigned short x = msg.readInt16();
     const unsigned short y = msg.readInt16();
+    const bool nearby = (engine->getCurrentMapName() == mapName);
 
     logger->log("Changing map to %s (%d, %d)", mapName.c_str(), x, y);
 
@@ -301,8 +307,16 @@ PlayerHandler::handleMapChangeMessage(MessageIn &msg)
     current_npc = 0;
 
     const Vector &playerPos = player_node->getPosition();
-    const float scrollOffsetX = x - (int) playerPos.x;
-    const float scrollOffsetY = y - (int) playerPos.y;
+    float scrollOffsetX = 0.0f;
+    float scrollOffsetY = 0.0f;
+
+    /* Scroll if neccessary */
+    if (!nearby
+            || (abs(x - (int) playerPos.x) > MAP_TELEPORT_SCROLL_DISTANCE)
+            || (abs(y - (int) playerPos.y) > MAP_TELEPORT_SCROLL_DISTANCE)) {
+        scrollOffsetX = x - (int) playerPos.x;
+        scrollOffsetY = y - (int) playerPos.y;
+    }
 
     player_node->setAction(Being::STAND);
     player_node->setPosition(x, y);