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Added Astrolabe as direct files

James Whitehead Ii [04-25-07 - 22:47]
Added Astrolabe as direct files
Filename
Astrolabe/Astrolabe.lua
Astrolabe/AstrolabeMapMonitor.lua
Astrolabe/DongleStub.lua
Astrolabe/Load.xml
Astrolabe/lgpl.txt
diff --git a/Astrolabe/Astrolabe.lua b/Astrolabe/Astrolabe.lua
new file mode 100644
index 0000000..7b80e8a
--- /dev/null
+++ b/Astrolabe/Astrolabe.lua
@@ -0,0 +1,1186 @@
+--[[
+Name: Astrolabe
+Revision: $Rev: 627 $
+$Date: 2007-04-20T00:59:57.617577Z $
+Author(s): Esamynn (esamynn@wowinterface.com)
+Inspired By: Gatherer by Norganna
+             MapLibrary by Kristofer Karlsson (krka@kth.se)
+Website: http://esamynn.wowinterface.com/
+Documentation: http://www.esamynn.org/wiki/Astrolabe
+SVN: http://esamynn.org/svn/astrolabe/
+Description:
+	This is a library for the World of Warcraft UI system to place
+	icons accurately on both the Minimap and the Worldmaps accurately
+	and maintain the accuracy of those positions.
+
+Copyright (C) 2006-2007 James Carrothers
+
+License:
+	This library is free software; you can redistribute it and/or
+	modify it under the terms of the GNU Lesser General Public
+	License as published by the Free Software Foundation; either
+	version 2.1 of the License, or (at your option) any later version.
+
+	This library is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+	Lesser General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public
+	License along with this library; if not, write to the Free Software
+	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Note:
+	This library's source code is specifically designed to work with
+	World of Warcraft's interpreted AddOn system.  You have an implicit
+	licence to use this library with these facilities since that is its
+	designated purpose as per:
+	http://www.fsf.org/licensing/licenses/gpl-faq.html#InterpreterIncompat
+]]
+
+-- WARNING!!!
+-- DO NOT MAKE CHANGES TO THIS LIBRARY WITHOUT FIRST CHANGING THE LIBRARY_VERSION_MAJOR
+-- STRING (to something unique) OR ELSE YOU MAY BREAK OTHER ADDONS THAT USE THIS LIBRARY!!!
+local LIBRARY_VERSION_MAJOR = "Astrolabe-0.4"
+local LIBRARY_VERSION_MINOR = tonumber(string.match("$Revision: 627 $", "(%d+)") or 1)
+
+if not DongleStub then error(LIBRARY_VERSION_MAJOR .. " requires DongleStub.") end
+if not DongleStub:IsNewerVersion(LIBRARY_VERSION_MAJOR, LIBRARY_VERSION_MINOR) then return end
+
+local Astrolabe = {};
+
+-- define local variables for Data Tables (defined at the end of this file)
+local WorldMapSize, MinimapSize;
+
+function Astrolabe:GetVersion()
+	return LIBRARY_VERSION_MAJOR, LIBRARY_VERSION_MINOR;
+end
+
+--------------------------------------------------------------------------------------------------------------
+-- Working Tables and Config Constants
+--------------------------------------------------------------------------------------------------------------
+
+Astrolabe.LastPlayerPosition = { 0, 0, 0, 0 };
+Astrolabe.MinimapIcons = {};
+Astrolabe.IconsOnEdge = {};
+Astrolabe.IconsOnEdge_GroupChangeCallbacks = {};
+
+
+Astrolabe.MinimapUpdateTime = 0.2;
+Astrolabe.UpdateTimer = 0;
+Astrolabe.ForceNextUpdate = false;
+Astrolabe.IconsOnEdgeChanged = false;
+
+-- This variable indicates whether we know of a visible World Map or not.
+-- The state of this variable is controlled by the AstrolabeMapMonitor library.
+Astrolabe.WorldMapVisible = false;
+
+
+--------------------------------------------------------------------------------------------------------------
+-- Internal Utility Functions
+--------------------------------------------------------------------------------------------------------------
+
+local function assert(level,condition,message)
+	if not condition then
+		error(message,level)
+	end
+end
+
+local function argcheck(value, num, ...)
+	assert(1, type(num) == "number", "Bad argument #2 to 'argcheck' (number expected, got " .. type(level) .. ")")
+
+	for i=1,select("#", ...) do
+		if type(value) == select(i, ...) then return end
+	end
+
+	local types = strjoin(", ", ...)
+	local name = string.match(debugstack(2,2,0), ": in function [`<](.-)['>]")
+	error(string.format("Bad argument #%d to 'Astrolabe.%s' (%s expected, got %s)", num, name, types, type(value)), 3)
+end
+
+local function getContPosition( zoneData, z, x, y )
+	if ( z ~= 0 ) then
+		zoneData = zoneData[z];
+		x = x * zoneData.width + zoneData.xOffset;
+		y = y * zoneData.height + zoneData.yOffset;
+	else
+		x = x * zoneData.width;
+		y = y * zoneData.height;
+	end
+	return x, y;
+end
+
+
+--------------------------------------------------------------------------------------------------------------
+-- General Utility Functions
+--------------------------------------------------------------------------------------------------------------
+
+function Astrolabe:ComputeDistance( c1, z1, x1, y1, c2, z2, x2, y2 )
+	--[[
+	argcheck(c1, 2, "number");
+	assert(3, c1 >= 0, "ComputeDistance: Illegal continent index to c1: "..c1);
+	argcheck(z1, 3, "number", "nil");
+	argcheck(x1, 4, "number");
+	argcheck(y1, 5, "number");
+	argcheck(c2, 6, "number");
+	assert(3, c2 >= 0, "ComputeDistance: Illegal continent index to c2: "..c2);
+	argcheck(z2, 7, "number", "nil");
+	argcheck(x2, 8, "number");
+	argcheck(y2, 9, "number");
+	--]]
+
+	z1 = z1 or 0;
+	z2 = z2 or 0;
+
+	local dist, xDelta, yDelta;
+	if ( c1 == c2 and z1 == z2 ) then
+		-- points in the same zone
+		local zoneData = WorldMapSize[c1];
+		if ( z1 ~= 0 ) then
+			zoneData = zoneData[z1];
+		end
+		xDelta = (x2 - x1) * zoneData.width;
+		yDelta = (y2 - y1) * zoneData.height;
+
+	elseif ( c1 == c2 ) then
+		-- points on the same continent
+		local zoneData = WorldMapSize[c1];
+		x1, y1 = getContPosition(zoneData, z1, x1, y1);
+		x2, y2 = getContPosition(zoneData, z2, x2, y2);
+		xDelta = (x2 - x1);
+		yDelta = (y2 - y1);
+
+	elseif ( c1 and c2 ) then
+		local cont1 = WorldMapSize[c1];
+		local cont2 = WorldMapSize[c2];
+		if ( cont1.parentContinent == cont2.parentContinent ) then
+			x1, y1 = getContPosition(cont1, z1, x1, y1);
+			x2, y2 = getContPosition(cont2, z2, x2, y2);
+			if ( c1 ~= cont1.parentContinent ) then
+				x1 = x1 + cont1.xOffset;
+				y1 = y1 + cont1.yOffset;
+			end
+			if ( c2 ~= cont2.parentContinent ) then
+				x2 = x2 + cont2.xOffset;
+				y2 = y2 + cont2.yOffset;
+			end
+
+			xDelta = x2 - x1;
+			yDelta = y2 - y1;
+		end
+
+	end
+	if ( xDelta and yDelta ) then
+		dist = sqrt(xDelta*xDelta + yDelta*yDelta);
+	end
+	return dist, xDelta, yDelta;
+end
+
+function Astrolabe:TranslateWorldMapPosition( C, Z, xPos, yPos, nC, nZ )
+	--[[
+	argcheck(C, 2, "number");
+	argcheck(Z, 3, "number", "nil");
+	argcheck(xPos, 4, "number");
+	argcheck(yPos, 5, "number");
+	argcheck(nC, 6, "number");
+	argcheck(nZ, 7, "number", "nil");
+	--]]
+
+	Z = Z or 0;
+	nZ = nZ or 0;
+	if ( nC < 0 ) then
+		return;
+	end
+
+	local zoneData;
+	if ( C == nC and Z == nZ ) then
+		return xPos, yPos;
+
+	elseif ( C == nC ) then
+		-- points on the same continent
+		zoneData = WorldMapSize[C];
+		xPos, yPos = getContPosition(zoneData, Z, xPos, yPos);
+		if ( nZ ~= 0 ) then
+			zoneData = WorldMapSize[C][nZ];
+			xPos = xPos - zoneData.xOffset;
+			yPos = yPos - zoneData.yOffset;
+		end
+
+	elseif ( C and nC ) and ( WorldMapSize[C].parentContinent == WorldMapSize[nC].parentContinent ) then
+		-- different continents, same world
+		zoneData = WorldMapSize[C];
+		local parentContinent = zoneData.parentContinent;
+		xPos, yPos = getContPosition(zoneData, Z, xPos, yPos);
+		if ( C ~= parentContinent ) then
+			-- translate up to world map if we aren't there already
+			xPos = xPos + zoneData.xOffset;
+			yPos = yPos + zoneData.yOffset;
+			zoneData = WorldMapSize[parentContinent];
+		end
+		if ( nC ~= parentContinent ) then
+			-- translate down to the new continent
+			zoneData = WorldMapSize[nC];
+			xPos = xPos - zoneData.xOffset;
+			yPos = yPos - zoneData.yOffset;
+			if ( nZ ~= 0 ) then
+				zoneData = zoneData[nZ];
+				xPos = xPos - zoneData.xOffset;
+				yPos = yPos - zoneData.yOffset;
+			end
+		end
+
+	else
+		return;
+	end
+
+	return (xPos / zoneData.width), (yPos / zoneData.height);
+end
+
+--*****************************************************************************
+-- This function will do its utmost to retrieve some sort of valid position
+-- for the specified unit, including changing the current map zoom (if needed).
+-- Map Zoom is returned to its previous setting before this function returns.
+--*****************************************************************************
+function Astrolabe:GetUnitPosition( unit, noMapChange )
+	local x, y = GetPlayerMapPosition(unit);
+	if ( x <= 0 and y <= 0 ) then
+		if ( notMapChange ) then
+			-- no valid position on the current map, and we aren't allowed
+			-- to change map zoom, so return
+			return;
+		end
+		local lastCont, lastZone = GetCurrentMapContinent(), GetCurrentMapZone();
+		SetMapToCurrentZone();
+		x, y = GetPlayerMapPosition(unit);
+		if ( x <= 0 and y <= 0 ) then
+			SetMapZoom(GetCurrentMapContinent());
+			x, y = GetPlayerMapPosition(unit);
+			if ( x <= 0 and y <= 0 ) then
+				-- we are in an instance or otherwise off the continent map
+				return;
+			end
+		end
+		local C, Z = GetCurrentMapContinent(), GetCurrentMapZone();
+		if ( C ~= lastCont or Z ~= lastZone ) then
+			SetMapZoom(lastCont, lastZone); -- set map zoom back to what it was before
+		end
+		return C, Z, x, y;
+	end
+	return GetCurrentMapContinent(), GetCurrentMapZone(), x, y;
+end
+
+--*****************************************************************************
+-- This function will do its utmost to retrieve some sort of valid position
+-- for the specified unit, including changing the current map zoom (if needed).
+-- However, if a monitored WorldMapFrame (See AstrolabeMapMonitor.lua) is
+-- visible, then will simply return nil if the current zoom does not provide
+-- a valid position for the player unit.  Map Zoom is returned to its previous
+-- setting before this function returns, if it was changed.
+--*****************************************************************************
+function Astrolabe:GetCurrentPlayerPosition()
+	local x, y = GetPlayerMapPosition("player");
+	if ( x <= 0 and y <= 0 ) then
+		if ( self.WorldMapVisible ) then
+			-- we know there is a visible world map, so don't cause
+			-- WORLD_MAP_UPDATE events by changing map zoom
+			return;
+		end
+		local lastCont, lastZone = GetCurrentMapContinent(), GetCurrentMapZone();
+		SetMapToCurrentZone();
+		x, y = GetPlayerMapPosition("player");
+		if ( x <= 0 and y <= 0 ) then
+			SetMapZoom(GetCurrentMapContinent());
+			x, y = GetPlayerMapPosition("player");
+			if ( x <= 0 and y <= 0 ) then
+				-- we are in an instance or otherwise off the continent map
+				return;
+			end
+		end
+		local C, Z = GetCurrentMapContinent(), GetCurrentMapZone();
+		if ( C ~= lastCont or Z ~= lastZone ) then
+			SetMapZoom(lastCont, lastZone); --set map zoom back to what it was before
+		end
+		return C, Z, x, y;
+	end
+	return GetCurrentMapContinent(), GetCurrentMapZone(), x, y;
+end
+
+
+--------------------------------------------------------------------------------------------------------------
+-- Working Table Cache System
+--------------------------------------------------------------------------------------------------------------
+
+local tableCache = {};
+tableCache["__mode"] = "v";
+setmetatable(tableCache, tableCache);
+
+local function GetWorkingTable( icon )
+	if ( tableCache[icon] ) then
+		return tableCache[icon];
+	else
+		local T = {};
+		tableCache[icon] = T;
+		return T;
+	end
+end
+
+
+--------------------------------------------------------------------------------------------------------------
+-- Minimap Icon Placement
+--------------------------------------------------------------------------------------------------------------
+
+-- local variables specifically for use in this section
+local minimapRotationEnabled = false;
+local MinimapCompassRing = MiniMapCompassRing;
+local twoPi = math.pi * 2;
+local atan2 = math.atan2;
+local sin = math.sin;
+local cos = math.cos;
+
+local function placeIconOnMinimap( minimap, minimapZoom, mapWidth, mapHeight, icon, dist, xDist, yDist )
+	--TODO: add support for non-circular minimaps
+	local mapDiameter;
+	if ( Astrolabe.minimapOutside ) then
+		mapDiameter = MinimapSize.outdoor[minimapZoom];
+	else
+		mapDiameter = MinimapSize.indoor[minimapZoom];
+	end
+	local mapRadius = mapDiameter / 2;
+	local xScale = mapDiameter / mapWidth;
+	local yScale = mapDiameter / mapHeight;
+	local iconDiameter = ((icon:GetWidth() / 2) + 3) * xScale;
+	local iconOnEdge = nil;
+
+	if ( minimapRotationEnabled ) then
+		-- for the life of me, I cannot figure out why the following
+		-- math works, but it does
+		local dir = atan2(xDist, yDist) + MinimapCompassRing:GetFacing();
+		xDist = dist * sin(dir);
+		yDist = dist * cos(dir);
+	end
+
+	if ( (dist + iconDiameter) > mapRadius ) then
+		-- position along the outside of the Minimap
+		iconOnEdge = true;
+		local factor = (mapRadius - iconDiameter) / dist;
+		xDist = xDist * factor;
+		yDist = yDist * factor;
+	end
+	if ( Astrolabe.IconsOnEdge[icon] ~= iconOnEdge ) then
+		Astrolabe.IconsOnEdge[icon] = iconOnEdge;
+		Astrolabe.IconsOnEdgeChanged = true;
+	end
+
+	icon:ClearAllPoints();
+	icon:SetPoint("CENTER", minimap, "CENTER", xDist/xScale, -yDist/yScale);
+end
+
+function Astrolabe:PlaceIconOnMinimap( icon, continent, zone, xPos, yPos )
+	-- check argument types
+	argcheck(icon, 2, "table");
+	assert(3, icon.SetPoint and icon.ClearAllPoints, "Usage Message");
+	argcheck(continent, 3, "number");
+	argcheck(zone, 4, "number", "nil");
+	argcheck(xPos, 5, "number");
+	argcheck(yPos, 6, "number");
+
+	local lC, lZ, lx, ly = unpack(self.LastPlayerPosition);
+	local dist, xDist, yDist = self:ComputeDistance(lC, lZ, lx, ly, continent, zone, xPos, yPos);
+	if not ( dist ) then
+		--icon's position has no meaningful position relative to the player's current location
+		return -1;
+	end
+	local iconData = self.MinimapIcons[icon];
+	if not ( iconData ) then
+		iconData = GetWorkingTable(icon);
+		self.MinimapIcons[icon] = iconData;
+	end
+	iconData.continent = continent;
+	iconData.zone = zone;
+	iconData.xPos = xPos;
+	iconData.yPos = yPos;
+	iconData.dist = dist;
+	iconData.xDist = xDist;
+	iconData.yDist = yDist;
+
+	if ( GetCVar("rotateMinimap") ~= "0" ) then
+		minimapRotationEnabled = true;
+	else
+		minimapRotationEnabled = false;
+	end
+
+	-- place the icon on the Minimap and :Show() it
+	local map = Minimap
+	placeIconOnMinimap(map, map:GetZoom(), map:GetWidth(), map:GetHeight(), icon, dist, xDist, yDist);
+	icon:Show()
+
+	return 0;
+end
+
+function Astrolabe:RemoveIconFromMinimap( icon )
+	if not ( self.MinimapIcons[icon] ) then
+		return 1;
+	end
+	self.MinimapIcons[icon] = nil;
+	self.IconsOnEdge[icon] = nil;
+	icon:Hide();
+	return 0;
+end
+
+function Astrolabe:RemoveAllMinimapIcons()
+	local minimapIcons = self.MinimapIcons;
+	local IconsOnEdge = self.IconsOnEdge;
+	for k, v in pairs(minimapIcons) do
+		minimapIcons[k] = nil;
+		IconsOnEdge[k] = nil;
+		k:Hide();
+	end
+end
+
+local lastZoom;
+function Astrolabe:UpdateMinimapIconPositions()
+	local C, Z, x, y = self:GetCurrentPlayerPosition();
+	if not ( C and C >= 0 ) then
+		if not ( self.WorldMapVisible ) then
+			self.processingFrame:Hide();
+		end
+		return;
+	end
+	local Minimap = Minimap;
+	local lastPosition = self.LastPlayerPosition;
+	local lC, lZ, lx, ly = unpack(lastPosition);
+
+	if ( GetCVar("rotateMinimap") ~= "0" ) then
+		minimapRotationEnabled = true;
+	else
+		minimapRotationEnabled = false;
+	end
+
+	if ( lC == C and lZ == Z and lx == x and ly == y ) then
+		-- player has not moved since the last update
+		if ( lastZoom ~= Minimap:GetZoom() or self.ForceNextUpdate or minimapRotationEnabled ) then
+			local currentZoom = Minimap:GetZoom();
+			lastZoom = currentZoom;
+			local mapWidth = Minimap:GetWidth();
+			local mapHeight = Minimap:GetHeight();
+			for icon, data in pairs(self.MinimapIcons) do
+				placeIconOnMinimap(Minimap, currentZoom, mapWidth, mapHeight, icon, data.dist, data.xDist, data.yDist);
+			end
+			self.ForceNextUpdate = false;
+		end
+	else
+		local dist, xDelta, yDelta = self:ComputeDistance(lC, lZ, lx, ly, C, Z, x, y);
+		if ( dist ) then
+			local currentZoom = Minimap:GetZoom();
+			lastZoom = currentZoom;
+			local mapWidth = Minimap:GetWidth();
+			local mapHeight = Minimap:GetHeight();
+			for icon, data in pairs(self.MinimapIcons) do
+				local xDist = data.xDist - xDelta;
+				local yDist = data.yDist - yDelta;
+				local dist = sqrt(xDist*xDist + yDist*yDist);
+				placeIconOnMinimap(Minimap, currentZoom, mapWidth, mapHeight, icon, dist, xDist, yDist);
+
+				data.dist = dist;
+				data.xDist = xDist;
+				data.yDist = yDist;
+			end
+		else
+			self:RemoveAllMinimapIcons()
+		end
+
+		lastPosition[1] = C;
+		lastPosition[2] = Z;
+		lastPosition[3] = x;
+		lastPosition[4] = y;
+	end
+end
+
+function Astrolabe:CalculateMinimapIconPositions()
+	local C, Z, x, y = self:GetCurrentPlayerPosition();
+	if not ( C and C >= 0 ) then
+		if not ( self.WorldMapVisible ) then
+			self.processingFrame:Hide();
+		end
+		return;
+	end
+
+	if ( GetCVar("rotateMinimap") ~= "0" ) then
+		minimapRotationEnabled = true;
+	else
+		minimapRotationEnabled = false;
+	end
+
+	local currentZoom = Minimap:GetZoom();
+	lastZoom = currentZoom;
+	local Minimap = Minimap;
+	local mapWidth = Minimap:GetWidth();
+	local mapHeight = Minimap:GetHeight();
+	for icon, data in pairs(self.MinimapIcons) do
+		local dist, xDist, yDist = self:ComputeDistance(C, Z, x, y, data.continent, data.zone, data.xPos, data.yPos);
+		if ( dist ) then
+			placeIconOnMinimap(Minimap, currentZoom, mapWidth, mapHeight, icon, dist, xDist, yDist);
+
+			data.dist = dist;
+			data.xDist = xDist;
+			data.yDist = yDist;
+		else
+			self:RemoveIconFromMinimap(icon)
+		end
+	end
+
+	local lastPosition = self.LastPlayerPosition;
+	lastPosition[1] = C;
+	lastPosition[2] = Z;
+	lastPosition[3] = x;
+	lastPosition[4] = y;
+end
+
+function Astrolabe:GetDistanceToIcon( icon )
+	local data = self.MinimapIcons[icon];
+	if ( data ) then
+		return data.dist, data.xDist, data.yDist;
+	end
+end
+
+function Astrolabe:IsIconOnEdge( icon )
+	return self.IconsOnEdge[icon];
+end
+
+function Astrolabe:GetDirectionToIcon( icon )
+	local data = self.MinimapIcons[icon];
+	if ( data ) then
+		local dir = atan2(data.xDist, -(data.yDist))
+		if ( dir > 0 ) then
+			return twoPi - dir;
+		else
+			return -dir;
+		end
+	end
+end
+
+function Astrolabe:Register_OnEdgeChanged_Callback( func, ident )
+	-- check argument types
+	argcheck(func, 2, "function");
+
+	self.IconsOnEdge_GroupChangeCallbacks[func] = ident;
+end
+
+
+--------------------------------------------------------------------------------------------------------------
+-- World Map Icon Placement
+--------------------------------------------------------------------------------------------------------------
+
+function Astrolabe:PlaceIconOnWorldMap( worldMapFrame, icon, continent, zone, xPos, yPos )
+	-- check argument types
+	argcheck(worldMapFrame, 2, "table");
+	assert(3, worldMapFrame.GetWidth and worldMapFrame.GetHeight, "Usage Message");
+	argcheck(icon, 3, "table");
+	assert(3, icon.SetPoint and icon.ClearAllPoints, "Usage Message");
+	argcheck(continent, 4, "number");
+	argcheck(zone, 5, "number", "nil");
+	argcheck(xPos, 6, "number");
+	argcheck(yPos, 7, "number");
+
+	local C, Z = GetCurrentMapContinent(), GetCurrentMapZone();
+	local nX, nY = self:TranslateWorldMapPosition(continent, zone, xPos, yPos, C, Z);
+
+	-- anchor and :Show() the icon if it is within the boundry of the current map, :Hide() it otherwise
+	if ( nX and nY and (0 < nX and nX <= 1) and (0 < nY and nY <= 1) ) then
+		icon:ClearAllPoints();
+		icon:SetPoint("CENTER", worldMapFrame, "TOPLEFT", nX * worldMapFrame:GetWidth(), -nY * worldMapFrame:GetHeight());
+		icon:Show();
+	else
+		icon:Hide();
+	end
+	return nX, nY;
+end
+
+
+--------------------------------------------------------------------------------------------------------------
+-- Handler Scripts
+--------------------------------------------------------------------------------------------------------------
+
+function Astrolabe:OnEvent( frame, event )
+	if ( event == "MINIMAP_UPDATE_ZOOM" ) then
+		-- update minimap zoom scale
+		local Minimap = Minimap;
+		local curZoom = Minimap:GetZoom();
+		if ( GetCVar("minimapZoom") == GetCVar("minimapInsideZoom") ) then
+			if ( curZoom < 2 ) then
+				Minimap:SetZoom(curZoom + 1);
+			else
+				Minimap:SetZoom(curZoom - 1);
+			end
+		end
+		if ( GetCVar("minimapZoom")+0 == Minimap:GetZoom() ) then
+			self.minimapOutside = true;
+		else
+			self.minimapOutside = false;
+		end
+		Minimap:SetZoom(curZoom);
+
+		-- re-calculate all Minimap Icon positions
+		if ( frame:IsVisible() ) then
+			self:CalculateMinimapIconPositions();
+		end
+
+	elseif ( event == "PLAYER_LEAVING_WORLD" ) then
+		frame:Hide();
+		self:RemoveAllMinimapIcons(); --dump all minimap icons
+
+	elseif ( event == "PLAYER_ENTERING_WORLD" ) then
+		frame:Show();
+		if not ( frame:IsVisible() ) then
+			-- do the minimap recalculation anyways if the OnShow script didn't execute
+			self:CalculateMinimapIconPositions();
+		end
+
+	elseif ( event == "ZONE_CHANGED_NEW_AREA" ) then
+		frame:Show();
+
+	end
+end
+
+function Astrolabe:OnUpdate( frame, elapsed )
+	-- on-edge group changed call-backs
+	if ( self.IconsOnEdgeChanged ) then
+		self.IconsOnEdgeChanged = false;
+		for func in pairs(self.IconsOnEdge_GroupChangeCallbacks) do
+			pcall(func);
+		end
+	end
+
+	-- icon position updates
+	local updateTimer = self.UpdateTimer - elapsed;
+	if ( updateTimer > 0 ) then
+		self.UpdateTimer = updateTimer;
+		return;
+	end
+	self.UpdateTimer = self.MinimapUpdateTime;
+	self:UpdateMinimapIconPositions();
+end
+
+function Astrolabe:OnShow( frame )
+	-- set the world map to a zoom with a valid player position
+	local C, Z = Astrolabe:GetCurrentPlayerPosition();
+	if ( C and C >= 0 ) then
+		SetMapZoom(C, Z);
+	else
+		frame:Hide();
+	end
+
+	-- re-calculate minimap icon positions
+	self:CalculateMinimapIconPositions();
+end
+
+-- called by AstrolabMapMonitor when all world maps are hidden
+function Astrolabe:AllWorldMapsHidden()
+	self:CalculateMinimapIconPositions();
+end
+
+
+--------------------------------------------------------------------------------------------------------------
+-- Library Registration
+--------------------------------------------------------------------------------------------------------------
+
+local function activate( newInstance, oldInstance )
+	if ( oldInstance ) then -- this is an upgrade activate
+		for k, v in pairs(oldInstance) do
+			if ( type(v) ~= "function" ) then
+				newInstance[k] = v;
+			end
+		end
+		Astrolabe = oldInstance;
+	else
+		local frame = CreateFrame("Frame");
+		frame:Hide();
+		newInstance.processingFrame = frame;
+
+		newInstance.ContinentList = { GetMapContinents() };
+		for C in pairs(newInstance.ContinentList) do
+			local zones = { GetMapZones(C) };
+			newInstance.ContinentList[C] = zones;
+			for Z in ipairs(zones) do
+				SetMapZoom(C, Z);
+				zones[Z] = GetMapInfo();
+			end
+		end
+	end
+
+	local frame = newInstance.processingFrame;
+	frame:SetParent("Minimap");
+	frame:UnregisterAllEvents();
+	frame:RegisterEvent("MINIMAP_UPDATE_ZOOM");
+	frame:RegisterEvent("PLAYER_LEAVING_WORLD");
+	frame:RegisterEvent("PLAYER_ENTERING_WORLD");
+	frame:RegisterEvent("ZONE_CHANGED_NEW_AREA");
+	frame:SetScript("OnEvent",
+		function( frame, event, ... )
+			Astrolabe:OnEvent(frame, event, ...);
+		end
+	);
+	frame:SetScript("OnUpdate",
+		function( frame, elapsed )
+			Astrolabe:OnUpdate(frame, elapsed);
+		end
+	);
+	frame:SetScript("OnShow",
+		function( frame )
+			Astrolabe:OnShow(frame);
+		end
+	);
+
+	-- register this library with AstrolabeMapMonitor
+	local AstrolabeMapMonitor = DongleStub("AstrolabeMapMonitor");
+	AstrolabeMapMonitor:RegisterAstrolabeLibrary(Astrolabe, LIBRARY_VERSION_MAJOR);
+end
+
+DongleStub:Register(Astrolabe, activate)
+
+
+--------------------------------------------------------------------------------------------------------------
+-- Data
+--------------------------------------------------------------------------------------------------------------
+
+-- diameter of the Minimap in game yards at
+-- the various possible zoom levels
+MinimapSize = {
+	indoor = {
+		[0] = 300, -- scale
+		[1] = 240, -- 1.25
+		[2] = 180, -- 5/3
+		[3] = 120, -- 2.5
+		[4] = 80,  -- 3.75
+		[5] = 50,  -- 6
+	},
+	outdoor = {
+		[0] = 466 + 2/3, -- scale
+		[1] = 400,       -- 7/6
+		[2] = 333 + 1/3, -- 1.4
+		[3] = 266 + 2/6, -- 1.75
+		[4] = 200,       -- 7/3
+		[5] = 133 + 1/3, -- 3.5
+	},
+}
+
+-- distances across and offsets of the world maps
+-- in game yards
+WorldMapSize = {
+	-- World Map of Azeroth
+	[0] = {
+		parentContinent = 0,
+		height = 29687.90575403711,
+		width = 44531.82907938571,
+	},
+	-- Kalimdor
+	{ --[1]
+		parentContinent = 0,
+		height = 24532.39670836129,
+		width = 36798.56388065484,
+		xOffset = -8310.762035321373,
+		yOffset = 1815.149000954498,
+		zoneData = {
+			Ashenvale = {
+				height = 3843.627450950699,
+				width = 5766.471113365881,
+				xOffset = 15366.08027406009,
+				yOffset = 8126.716152815561,
+			},
+			Aszhara = {
+				height = 3381.153764845262,
+				width = 5070.669448432522,
+				xOffset = 20342.99178351035,
+				yOffset = 7457.974565554941,
+			},
+			AzuremystIsle = {
+				height = 2714.490705490833,
+				width = 4070.691916244019,
+				xOffset = 9966.264785353642,
+				yOffset = 5460.139378090237,
+			},
+			Barrens = {
+				height = 6756.028094350823,
+				width = 10132.98626357964,
+				xOffset = 14443.19633043607,
+				yOffset = 11187.03406016663,
+			},
+			BloodmystIsle = {
+				height = 2174.923922716305,
+				width = 3262.385067990556,
+				xOffset = 9541.280691875327,
+				yOffset = 3424.790637352245,
+			},
+			Darkshore = {
+				height = 4366.52571734943,
+				width = 6549.780280774227,
+				xOffset = 14124.4534386827,
+				yOffset = 4466.419105960455,
+			},
+			Darnassis = {
+				height = 705.7102838625474,
+				width = 1058.300884213672,
+				xOffset = 14127.75729935019,
+				yOffset = 2561.497770365213,
+			},
+			Desolace = {
+				height = 2997.808472061639,
+				width = 4495.726850591814,
+				xOffset = 12832.80723200791,
+				yOffset = 12347.420176847,
+			},
+			Durotar = {
+				height = 3524.884894927208,
+				width = 5287.285801274457,
+				xOffset = 19028.47465485265,
+				yOffset = 10991.20642822035,
+			},
+			Dustwallow = {
+				height = 3499.922239823486,
+				width = 5249.824712249077,
+				xOffset = 18040.98829886713,
+				yOffset = 14832.74650226312,
+			},
+			Felwood = {
+				height = 3833.206376333298,
+				width = 5749.8046476606,
+				xOffset = 15424.4116748014,
+				yOffset = 5666.381311442202,
+			},
+			Feralas = {
+				height = 4633.182754891688,
+				width = 6949.760203962193,
+				xOffset = 11624.54217828119,
+				yOffset = 15166.06954533647,
+			},
+			Moonglade = {
+				height = 1539.548478194226,
+				width = 2308.253559286662,
+				xOffset = 18447.22668103606,
+				yOffset = 4308.084192710569,
+			},
+			Mulgore = {
+				height = 3424.88834791471,
+				width = 5137.32138887616,
+				xOffset = 15018.17633401988,
+				yOffset = 13072.38917227894,
+			},
+			Ogrimmar = {
+				height = 935.3750279485016,
+				width = 1402.563051365538,
+				xOffset = 20746.49533101771,
+				yOffset = 10525.68532631853,
+			},
+			Silithus = {
+				height = 2322.839629859208,
+				width = 3483.224287356748,
+				xOffset = 14528.60591761034,
+				yOffset = 18757.61998086822,
+			},
+			StonetalonMountains = {
+				height = 3256.141917023559,
+				width = 4883.173287670144,
+				xOffset = 13820.29750397374,
+				yOffset = 9882.909063258192,
+			},
+			Tanaris = {
+				height = 4599.847335452488,
+				width = 6899.765399158026,
+				xOffset = 17284.7655865671,
+				yOffset = 18674.28905369955,
+			},
+			Teldrassil = {
+				height = 3393.632169760774,
+				width = 5091.467863261982,
+				xOffset = 13251.58449896318,
+				yOffset = 968.6223632831094,
+			},
+			TheExodar = {
+				height = 704.6641703983866,
+				width = 1056.732317707213,
+				xOffset = 10532.61275516805,
+				yOffset = 6276.045028807911,
+			},
+			ThousandNeedles = {
+				height = 2933.241274801781,
+				width = 4399.86408093722,
+				xOffset = 17499.32929341832,
+				yOffset = 16766.0151133423,
+			},
+			ThunderBluff = {
+				height = 695.8116150081206,
+				width = 1043.762849319158,
+				xOffset = 16549.32009877855,
+				yOffset = 13649.45129927044,
+			},
+			UngoroCrater = {
+				height = 2466.588521980952,
+				width = 3699.872808671186,
+				xOffset = 16532.70803775362,
+				yOffset = 18765.95157787033,
+			},
+			Winterspring = {
+				height = 4733.190938744951,
+				width = 7099.756078049357,
+				xOffset = 17382.67868933954,
+				yOffset = 4266.421320915686,
+			},
+		},
+	},
+	-- Eastern Kingdoms
+	{ --[2]
+		parentContinent = 0,
+		height = 25098.84390074281,
+		width = 37649.15159852673,
+		xOffset = 15525.32200715066,
+		yOffset = 672.3934326738229,
+		zoneData = {
+			Alterac = {
+				height = 1866.508741236576,
+				width = 2799.820894040741,
+				xOffset = 16267.51182664554,
+				yOffset = 7693.598754637632,
+			},
+			Arathi = {
+				height = 2399.784956908336,
+				width = 3599.78645678886,
+				xOffset = 17917.40598190062,
+				yOffset = 9326.804744097401,
+			},
+			Badlands = {
+				height = 1658.195027852759,
+				width = 2487.343589680943,
+				xOffset = 19129.83542887301,
+				yOffset = 15082.55526717644,
+			},
+			BlastedLands = {
+				height = 2233.146573433955,
+				width = 3349.808966078055,
+				xOffset = 18292.37876312771,
+				yOffset = 19759.24272564734,
+			},
+			BurningSteppes = {
+				height = 1951.911155356982,
+				width = 2928.988452241535,
+				xOffset = 17317.44291506163,
+				yOffset = 16224.12640057407,
+			},
+			DeadwindPass = {
+				height = 1666.528298197048,
+				width = 2499.848163715574,
+				xOffset = 17884.07519016362,
+				yOffset = 19059.30117481421,
+			},
+			DunMorogh = {
+				height = 3283.064682642022,
+				width = 4924.664537147015,
+				xOffset = 15248.84370721237,
+				yOffset = 13070.22369811241,
+			},
+			Duskwood = {
+				height = 1799.84874595001,
+				width = 2699.837284973949,
+				xOffset = 16217.51007473156,
+				yOffset = 18909.31475362112,
+			},
+			EasternPlaguelands = {
+				height = 2581.024511737268,
+				width = 3870.596078314358,
+				xOffset = 19236.07699848783,
+				yOffset = 5393.799386328108,
+			},
+			Elwynn = {
+				height = 2314.38613060264,
+				width = 3470.62593362794,
+				xOffset = 15515.46777926721,
+				yOffset = 17132.38313881497,
+			},
+			EversongWoods = {
+				height = 3283.057803444214,
+				width = 4924.70470173181,
+				xOffset = 19138.16325760612,
+				yOffset = 552.5351270080572,
+			},
+			Ghostlands = {
+				height = 2199.788221727843,
+				width = 3299.755735439147,
+				xOffset = 19933.969945598,
+				yOffset = 3327.317139912411,
+			},
+			Hilsbrad = {
+				height = 2133.153088717906,
+				width = 3199.802496078764,
+				xOffset = 15984.19170342619,
+				yOffset = 8793.505832296016,
+			},
+			Hinterlands = {
+				height = 2566.448674847725,
+				width = 3849.77134323942,
+				xOffset = 18625.69536724846,
+				yOffset = 7726.929725104341,
+			},
+			Ironforge = {
+				height = 527.5626661642974,
+				width = 790.5745810546713,
+				xOffset = 17764.34206355846,
+				yOffset = 13762.32403658607,
+			},
+			LochModan = {
+				height = 1839.436067817912,
+				width = 2758.158752877019,
+				xOffset = 19044.42466174755,
+				yOffset = 13680.58746225864,
+			},
+			Redridge = {
+				height = 1447.811817383856,
+				width = 2170.704876735185,
+				xOffset = 18621.52904187992,
+				yOffset = 17767.73128664901,
+			},
+			SearingGorge = {
+				height = 1487.371558351205,
+				width = 2231.119799153945,
+				xOffset = 17373.68649889545,
+				yOffset = 15292.9566475719,
+			},
+			SilvermoonCity = {
+				height = 806.6680775210333,
+				width = 1211.384457945605,
+				xOffset = 21051.29911245071,
+				yOffset = 1440.439646345552,
+			},
+			Silverpine = {
+				height = 2799.763349841058,
+				width = 4199.739879721531,
+				xOffset = 13601.00798540562,
+				yOffset = 7526.945768538925,
+			},
+			Stormwind = {
+				height = 896.2784132739149,
+				width = 1344.138055148283,
+				xOffset = 15669.93346231942,
+				yOffset = 17471.62163820253,
+			},
+			Stranglethorn = {
+				height = 4253.796738213571,
+				width = 6380.866711475876,
+				xOffset = 14830.09122763351,
+				yOffset = 20361.27611706414,
+			},
+			SwampOfSorrows = {
+				height = 1529.04028583782,
+				width = 2293.606089974149,
+				xOffset = 19273.57577346738,
+				yOffset = 18813.48829580375,
+			},
+			Tirisfal = {
+				height = 3012.244783356771,
+				width = 4518.469744413802,
+				xOffset = 14017.64852522109,
+				yOffset = 5356.296558943325,
+			},
+			Undercity = {
+				height = 640.0492683780853,
+				width = 959.3140238076666,
+				xOffset = 16177.65630384973,
+				yOffset = 7315.685533181013,
+			},
+			WesternPlaguelands = {
+				height = 2866.410476553068,
+				width = 4299.7374000546,
+				xOffset = 16634.14908983872,
+				yOffset = 5827.092974820261,
+			},
+			Westfall = {
+				height = 2333.132106534445,
+				width = 3499.786489780177,
+				xOffset = 14034.31142029944,
+				yOffset = 18592.67765947875,
+			},
+			Wetlands = {
+				height = 2756.004767589141,
+				width = 4135.166184805389,
+				xOffset = 17440.35277057554,
+				yOffset = 11341.20698670613,
+			},
+		},
+	},
+	-- Outland
+	{ --[3]
+		parentContinent = 3,
+		height = 11642.3552270912,
+		width = 17463.5328406368,
+		zoneData = {
+			BladesEdgeMountains = {
+				height = 3616.553353533977,
+				width = 5424.84803598309,
+				xOffset = 4150.068157139826,
+				yOffset = 1412.982266241851,
+			},
+			Hellfire = {
+				height = 3443.642890402687,
+				width = 5164.421615455519,
+				xOffset = 7456.223236253186,
+				yOffset = 4339.973528794677,
+			},
+			Nagrand = {
+				height = 3683.218386203915,
+				width = 5524.827295176373,
+				xOffset = 2700.121400200201,
+				yOffset = 5779.512212073806,
+			},
+			Netherstorm = {
+				height = 3716.547708910237,
+				width = 5574.82788866266,
+				xOffset = 7512.470386633603,
+				yOffset = 365.0992858464317,
+			},
+			ShadowmoonValley = {
+				height = 3666.547917042888,
+				width = 5499.827432644566,
+				xOffset = 8770.765422136874,
+				yOffset = 7769.034259125071,
+			},
+			ShattrathCity = {
+				height = 870.8063021892297,
+				width = 1306.210386847456,
+				xOffset = 6860.565394341991,
+				yOffset = 7295.086145447915,
+			},
+			TerokkarForest = {
+				height = 3599.889712038368,
+				width = 5399.832305361811,
+				xOffset = 5912.521284664757,
+				yOffset = 6821.146112637057,
+			},
+			Zangarmarsh = {
+				height = 3351.978685113859,
+				width = 5026.925554043871,
+				xOffset = 3520.930685571132,
+				yOffset = 3885.821388791224,
+			},
+		},
+	},
+}
+
+local zeroData;
+zeroData = { xOffset = 0, height = 0, yOffset = 0, width = 0, __index = function() return zeroData end };
+setmetatable(zeroData, zeroData);
+setmetatable(WorldMapSize, zeroData);
+
+for continent, zones in pairs(Astrolabe.ContinentList) do
+	local mapData = WorldMapSize[continent];
+	for index, mapName in pairs(zones) do
+		if not ( mapData.zoneData[mapName] ) then
+			--WE HAVE A PROBLEM!!!
+			ChatFrame1:AddMessage("Astrolabe is missing data for "..select(index, GetMapZones(continent))..".");
+			mapData.zoneData[mapName] = zeroData;
+		end
+		mapData[index] = mapData.zoneData[mapName];
+		mapData.zoneData[mapName] = nil;
+	end
+end
+
+
+-- do a full update of the Minimap positioning system
+Astrolabe:CalculateMinimapIconPositions();
diff --git a/Astrolabe/AstrolabeMapMonitor.lua b/Astrolabe/AstrolabeMapMonitor.lua
new file mode 100644
index 0000000..c9349c6
--- /dev/null
+++ b/Astrolabe/AstrolabeMapMonitor.lua
@@ -0,0 +1,235 @@
+--[[
+Name: AstrolabeMapMonitor
+Revision: $Rev: 626 $
+$Date: 2007-03-30T18:56:21.734670Z $
+Author(s): Esamynn (esamynn@wowinterface.com)
+Inspired By: Gatherer by Norganna
+             MapLibrary by Kristofer Karlsson (krka@kth.se)
+Website: http://esamynn.wowinterface.com/
+Documentation: http://www.esamynn.org/wiki/Astrolabe/World_Map_Monitor
+SVN: http://esamynn.org/svn/astrolabe/
+Description:
+	This is a small stub library to support the main Astrolabe
+	library.  It's purpose is to monitor the visibility of
+	various World Map frames, so that Astrolabe can modify its
+	behaviour accordingly.
+
+Copyright (C) 2007 James Carrothers
+
+License:
+	This library is free software; you can redistribute it and/or
+	modify it under the terms of the GNU Lesser General Public
+	License as published by the Free Software Foundation; either
+	version 2.1 of the License, or (at your option) any later version.
+
+	This library is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+	Lesser General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public
+	License along with this library; if not, write to the Free Software
+	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Note:
+	This library's source code is specifically designed to work with
+	World of Warcraft's interpreted AddOn system.  You have an implicit
+	licence to use this library with these facilities since that is its
+	designated purpose as per:
+	http://www.fsf.org/licensing/licenses/gpl-faq.html#InterpreterIncompat
+]]
+
+-- WARNING!!!
+-- DO NOT MAKE CHANGES TO THIS LIBRARY WITHOUT FIRST CHANGING THE LIBRARY_VERSION_MAJOR
+-- STRING (to something unique) OR ELSE YOU MAY BREAK OTHER ADDONS THAT USE THIS LIBRARY!!!
+local LIBRARY_VERSION_MAJOR = "AstrolabeMapMonitor"
+local LIBRARY_VERSION_MINOR = tonumber(string.match("$Revision: 626 $", "(%d+)") or 1)
+
+if not DongleStub then error(LIBRARY_VERSION_MAJOR .. " requires DongleStub.") end
+if not DongleStub:IsNewerVersion(LIBRARY_VERSION_MAJOR, LIBRARY_VERSION_MINOR) then return end
+
+local AstrolabeMapMonitor = {};
+
+function AstrolabeMapMonitor:GetVersion()
+	return LIBRARY_VERSION_MAJOR, LIBRARY_VERSION_MINOR;
+end
+
+
+--------------------------------------------------------------------------------------------------------------
+-- Global World Map Frame Registration Table
+--------------------------------------------------------------------------------------------------------------
+
+if ( type(WorldMapDisplayFrames) ~= "table" ) then
+	WorldMapDisplayFrames = { WorldMapFrame };
+else
+	local worldMapFound = false;
+	for k, v in pairs(WorldMapDisplayFrames) do
+		if ( v == WorldMapFrame ) then
+			worldMapFound = true;
+			break;
+		end
+	end
+	if not ( worldMapFound ) then
+		table.insert(WorldMapDisplayFrames, WorldMapFrame);
+	end
+end
+
+
+--------------------------------------------------------------------------------------------------------------
+-- Working Tables and Config Constants
+--------------------------------------------------------------------------------------------------------------
+
+AstrolabeMapMonitor.TrackedWorldMaps = {};
+AstrolabeMapMonitor.AstrolabeLibrarys = {};
+
+AstrolabeMapMonitor.NumVisibleWorldMaps = 0;
+
+
+--------------------------------------------------------------------------------------------------------------
+-- Monitor Frame Script Handlers
+--------------------------------------------------------------------------------------------------------------
+
+local function onShow( frame )
+	AstrolabeMapMonitor.NumVisibleWorldMaps = AstrolabeMapMonitor.NumVisibleWorldMaps + 1;
+	AstrolabeMapMonitor:Update()
+end
+
+local function onHide( frame )
+	AstrolabeMapMonitor.NumVisibleWorldMaps = AstrolabeMapMonitor.NumVisibleWorldMaps - 1;
+	AstrolabeMapMonitor:Update()
+end
+
+local function setScripts( monitorFrame )
+	monitorFrame:SetScript("OnShow", onShow);
+	monitorFrame:SetScript("OnHide", onHide);
+end
+
+
+--------------------------------------------------------------------------------------------------------------
+-- Internal Utility Functions
+--------------------------------------------------------------------------------------------------------------
+
+local function assert(level,condition,message)
+	if not condition then
+		error(message,level)
+	end
+end
+
+local function argcheck(value, num, ...)
+	assert(1, type(num) == "number",
+		"Bad argument #2 to 'argcheck' (number expected, got " .. type(level) .. ")")
+
+	for i=1,select("#", ...) do
+		if type(value) == select(i, ...) then return end
+	end
+
+	local types = strjoin(", ", ...)
+	local name = string.match(debugstack(2,2,0), ": in function [`<](.-)['>]")
+	error(string.format("Bad argument #%d to 'AstrolabeMapMonitor.%s' (%s expected, got %s)", num, name, types, type(value)), 3)
+end
+
+
+--------------------------------------------------------------------------------------------------------------
+-- Public API
+--------------------------------------------------------------------------------------------------------------
+
+function AstrolabeMapMonitor:MonitorWorldMap( worldMapFrame )
+	-- check argument types
+	argcheck(worldMapFrame, 2, "table");
+	assert((worldMapFrame.SetParent), "Usage Message");
+
+	local TrackedWorldMaps = self.TrackedWorldMaps;
+	if ( TrackedWorldMaps[worldMapFrame] ) then
+		return 1;
+	end
+	local monitorFrame = CreateFrame("Frame", nil, worldMapFrame);
+	TrackedWorldMaps[worldMapFrame] = monitorFrame;
+	setScripts(monitorFrame);
+	self:ForceUpdate();
+	return 0;
+end
+
+function AstrolabeMapMonitor:LookForMapsToRegister()
+	for k, frame in pairs(WorldMapDisplayFrames) do
+		if ( type(frame) == "table" and frame.SetParent ) then
+			self:MonitorWorldMap(frame);
+		end
+	end
+end
+
+function AstrolabeMapMonitor:Update()
+	local visibleMap = false;
+	if ( (self.NumVisibleWorldMaps) > 0 ) then
+		visibleMap = true;
+	end
+	for lib, versionString in pairs(self.AstrolabeLibrarys) do
+		lib.WorldMapVisible = visibleMap;
+		if ( (not visibleMap) and lib.AllWorldMapsHidden ) then
+			lib:AllWorldMapsHidden();
+		end
+	end
+	return visibleMap;
+end
+
+function AstrolabeMapMonitor:ForceUpdate()
+	self.NumVisibleWorldMaps = 0;
+	for worldMap, monitorFrame in pairs(self.TrackedWorldMaps) do
+		if ( worldMap:IsVisible() ) then
+			self.NumVisibleWorldMaps = self.NumVisibleWorldMaps + 1;
+		end
+	end
+	return self:Update();
+end
+
+function AstrolabeMapMonitor:RegisterAstrolabeLibrary( lib, majorVersionString )
+	-- check argument types
+	argcheck(lib, 2, "table");
+	argcheck(majorVersionString, 3, "string");
+
+	self.AstrolabeLibrarys[lib] = majorVersionString;
+	self:Update();
+end
+
+
+--------------------------------------------------------------------------------------------------------------
+-- Handler Scripts
+--------------------------------------------------------------------------------------------------------------
+
+function AstrolabeMapMonitor:OnEvent( frame, event )
+	if ( event == "ADDON_LOADED" ) then
+		self:LookForMapsToRegister();
+		self:ForceUpdate();
+	end
+end
+
+
+--------------------------------------------------------------------------------------------------------------
+-- Library Registration
+--------------------------------------------------------------------------------------------------------------
+
+local function activate( newInstance, oldInstance )
+	if ( oldInstance ) then -- this is an upgrade activate
+		for k, v in pairs(oldInstance) do
+			if ( type(v) ~= "function" ) then
+				newInstance[k] = v;
+			end
+		end
+		AstrolabeMapMonitor = oldInstance;
+	else
+		AstrolabeMapMonitor.eventFrame = CreateFrame("Frame");
+	end
+	for worldMap, monitorFrame in pairs(AstrolabeMapMonitor.TrackedWorldMaps) do
+		setScripts(monitorFrame);
+	end
+	local frame = AstrolabeMapMonitor.eventFrame;
+	frame:Hide();
+	frame:UnregisterAllEvents();
+	frame:RegisterEvent("ADDON_LOADED");
+	frame:SetScript("OnEvent",
+		function( frame, event, ... )
+			AstrolabeMapMonitor:OnEvent(frame, event, ...);
+		end
+	);
+end
+
+DongleStub:Register(AstrolabeMapMonitor, activate)
diff --git a/Astrolabe/DongleStub.lua b/Astrolabe/DongleStub.lua
new file mode 100644
index 0000000..2f14410
--- /dev/null
+++ b/Astrolabe/DongleStub.lua
@@ -0,0 +1,90 @@
+--[[-------------------------------------------------------------------------
+  James Whitehead II grants anyone the right to use this work for any purpose,
+  without any conditions, unless such conditions are required by law.
+---------------------------------------------------------------------------]]
+
+local major = "DongleStub-Beta0"
+local minor = tonumber(string.match("$Revision: 221 $", "(%d+)") or 1)
+
+local g = getfenv(0)
+
+if not g.DongleStub or g.DongleStub:IsNewerVersion(major, minor) then
+	local lib = setmetatable({}, {
+		__call = function(t,k)
+			if type(t.versions) == "table" and t.versions[k] then
+				return t.versions[k].instance
+			else
+				error("Cannot find a library with name '"..tostring(k).."'", 2)
+			end
+		end
+	})
+
+	function lib:IsNewerVersion(major, minor)
+		local versionData = self.versions and self.versions[major]
+
+		if not versionData then return true end
+		local oldmajor,oldminor = versionData.instance:GetVersion()
+
+		return minor > oldminor
+	end
+
+	local function NilCopyTable(src, dest)
+		for k,v in pairs(dest) do dest[k] = nil end
+		for k,v in pairs(src) do dest[k] = v end
+	end
+
+	function lib:Register(newInstance, activate, deactivate)
+		local major,minor = newInstance:GetVersion()
+		if not self:IsNewerVersion(major, minor) then return false end
+		if not self.versions then self.versions = {} end
+
+		local versionData = self.versions[major]
+		if not versionData then
+			-- New major version
+			versionData = {
+				["instance"] = newInstance,
+				["deactivate"] = deactivate,
+			}
+
+			self.versions[major] = versionData
+			if type(activate) == "function" then
+				activate(newInstance)
+			end
+			return newInstance
+		end
+
+		local oldDeactivate = versionData.deactivate
+		local oldInstance = versionData.instance
+
+		versionData.deactivate = deactivate
+
+		local skipCopy
+		if type(activate) == "function" then
+			 skipCopy = activate(newInstance, oldInstance)
+		end
+
+		-- Deactivate the old libary if necessary
+		if type(oldDeactivate) == "function" then
+			oldDeactivate(oldInstance, newInstance)
+		end
+
+		-- Re-use the old table, and discard the new one
+		if not skipCopy then
+			NilCopyTable(newInstance, oldInstance)
+		end
+		return oldInstance
+	end
+
+	function lib:GetVersion() return major,minor end
+
+	local function Activate(new, old)
+		if old then
+			new.versions = old.versions
+		end
+		g.DongleStub = new
+	end
+
+	-- Actually trigger libary activation here
+	local stub = g.DongleStub or lib
+	stub:Register(lib, Activate)
+end
diff --git a/Astrolabe/Load.xml b/Astrolabe/Load.xml
new file mode 100644
index 0000000..c63266f
--- /dev/null
+++ b/Astrolabe/Load.xml
@@ -0,0 +1,6 @@
+<Ui xmlns="http://www.blizzard.com/wow/ui/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.blizzard.com/wow/ui/
+..\FrameXML\UI.xsd">
+	<Script file="DongleStub.lua"/>
+	<Script file="AstrolabeMapMonitor.lua"/>
+	<Script file="Astrolabe.lua"/>
+</Ui>
diff --git a/Astrolabe/lgpl.txt b/Astrolabe/lgpl.txt
new file mode 100644
index 0000000..5ab7695
--- /dev/null
+++ b/Astrolabe/lgpl.txt
@@ -0,0 +1,504 @@
+		  GNU LESSER GENERAL PUBLIC LICENSE
+		       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+Licenses are intended to guarantee your freedom to share and change
+free software--to make sure the software is free for all its users.
+
+  This license, the Lesser General Public License, applies to some
+specially designated software packages--typically libraries--of the
+Free Software Foundation and other authors who decide to use it.  You
+can use it too, but we suggest you first think carefully about whether
+this license or the ordinary General Public License is the better
+strategy to use in any particular case, based on the explanations below.
+
+  When we speak of free software, we are referring to freedom of use,
+not price.  Our General Public Licenses are designed to make sure that
+you have the freedom to distribute copies of free software (and charge
+for this service if you wish); that you receive source code or can get
+it if you want it; that you can change the software and use pieces of
+it in new free programs; and that you are informed that you can do
+these things.
+
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+
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+library, and (2) we offer you this license, which gives you legal
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+           How to Apply These Terms to Your New Libraries
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+  If you develop a new library, and you want it to be of the greatest
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+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
+  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+  <signature of Ty Coon>, 1 April 1990
+  Ty Coon, President of Vice
+
+That's all there is to it!
+
+