Ports holomap blueprints from tg/vg.

Changes:
 - Clicking "view structural data" in the station blueprints menu will
   show you ghost images of where things like disposal pipes, wires,
   atmospherics pipes, and other power machinery are originally supposed
   to go. Note, this will show you the ghost images over turfs even if the
   machinery is destroyed.

code/game/objects/items/blueprints.dm

@@ -41,7 +41,7 @@
 	if(href_list["create_area"])
 		if(get_area_type()==AREA_SPACE)
 			create_area()
-	updateUsrDialog()
+
 
 
 //One-use area creation permits.
@@ -77,6 +77,12 @@
 	icon_state = "blueprints"
 	fluffnotice = "Property of Nanotrasen. For heads of staff only. Store in high-secure storage."
 	w_class = 3
+	var/list/showing = list()
+	var/client/viewing
+
+/obj/item/areaeditor/blueprints/Destroy()
+	clear_viewer()
+	return ..()
 
 
 /obj/item/areaeditor/blueprints/attack_self(mob/user as mob)
@@ -85,6 +91,11 @@
 	if(get_area_type() == AREA_STATION)
 		. += "<p>According to the [src], you are now in <b>\"[sanitize(A.name)]\"</b>.</p>"
 		. += "<p>You may <a href='?src=\ref[src];edit_area=1'> move an amendment</a> to the drawing.</p>"
+	if(!viewing)
+		. += "<p><a href='?src=\ref[src];view_blueprints=1'>View structural data</a></p>"
+	else
+		. += "<p><a href='?src=\ref[src];refresh=1'>Refresh structural data</a></p>"
+		. += "<p><a href='?src=\ref[src];hide_blueprints=1'>Hide structural data</a></p>"
 	var/datum/browser/popup = new(user, "blueprints", "[src]", 700, 500)
 	popup.set_content(.)
 	popup.open()
@@ -97,8 +108,43 @@
 		if(get_area_type()!=AREA_STATION)
 			return
 		edit_area()
-	updateUsrDialog()
+	if(href_list["view_blueprints"])
+		set_viewer(usr, "<span class='notice'>You flip the blueprints over to view the complex information diagram.</span>")
+	if(href_list["hide_blueprints"])
+		clear_viewer(usr, "<span class='notice'>You flip the blueprints over to view the simple information diagram.</span>")
+	if(href_list["refresh"])
+		clear_viewer(usr)
+		set_viewer(usr)
 
+	attack_self(usr)
+/obj/item/areaeditor/blueprints/proc/get_images(turf/T, viewsize)
+	. = list()
+	for(var/tt in RANGE_TURFS(viewsize, T))
+		var/turf/TT = tt
+		if(TT.blueprint_data)
+			. += TT.blueprint_data
+
+/obj/item/areaeditor/blueprints/proc/set_viewer(mob/user, message = "")
+	if(user && user.client)
+		if(viewing)
+			clear_viewer()
+		viewing = user.client
+		showing = get_images(get_turf(user), viewing.view)
+		viewing.images |= showing
+		if(message)
+			to_chat(user, message)
+
+/obj/item/areaeditor/blueprints/proc/clear_viewer(mob/user, message = "")
+	if(viewing)
+		viewing.images -= showing
+		viewing = null
+	showing.Cut()
+	if(message)
+		to_chat(user, message)
+
+/obj/item/areaeditor/blueprints/dropped(mob/user)
+	..()
+	clear_viewer()
 
 /obj/item/areaeditor/proc/get_area()
 	var/turf/T = get_turf(usr)

code/game/objects/objs.dm

@@ -23,6 +23,19 @@
 	// Reagent ID => friendly name
 	var/list/reagents_to_log=list()
 
+	var/on_blueprints = FALSE //Are we visible on the station blueprints at roundstart?
+	var/force_blueprints = FALSE //forces the obj to be on the blueprints, regardless of when it was created.
+
+/obj/New()
+	. = ..()
+
+	if(on_blueprints && isturf(loc))
+		var/turf/T = loc
+		if(force_blueprints)
+			T.add_blueprints(src)
+		else
+			T.add_blueprints_preround(src)
+
 /obj/Topic(href, href_list, var/nowindow = 0, var/datum/topic_state/state = default_state)
 	// Calling Topic without a corresponding window open causes runtime errors
 	if(!nowindow && ..())