examine signature changed to include distance

- distance is INFINITE, 0, or a positive integer based on get_dist() between
the examiner and examinee's turfs when they are on the same Z. When the
examiner is dead or a ghost, distance is always 0.
- also updates /examine( implementations to use it!
- adds w_class_to_name proc for reusing "It is a X item." examine behavior.

code/modules/paperwork/folders.dm

@@ -191,9 +191,9 @@
 		icon_state = "envelope_empty"
 
 
-/obj/item/folder/envelope/examine(mob/user)
+/obj/item/folder/envelope/examine(mob/user, distance, infix, suffix)
 	. = ..()
-	if (get_dist(src, user) > 3 && !isobserver(user))
+	if (distance > 3 && !isobserver(user))
 		return
 	if (envelope_seal)
 		. += "It has an [SPAN_NOTICE("intact [envelope_seal] seal")]."

code/modules/paperwork/paper.dm

@@ -149,9 +149,9 @@
 
 	free_space -= length(strip_html_properly(new_text))
 
-/obj/item/paper/examine(mob/user)
+/obj/item/paper/examine(mob/user, distance, infix, suffix)
 	. = ..()
-	if(in_range(user, src) || istype(user, /mob/observer/dead))
+	if(distance < 2 || istype(user, /mob/observer/dead))
 		show_content(usr)
 	else
 		. += "<span class='notice'>You have to go closer if you want to read it.</span>"

code/modules/paperwork/paper_bundle.dm

@@ -96,9 +96,9 @@
 			else
 				to_chat(user, "<font color='red'>You must hold \the [P] steady to burn \the [src].</font>")
 
-/obj/item/paper_bundle/examine(mob/user)
+/obj/item/paper_bundle/examine(mob/user, distance, infix, suffix)
 	. = ..()
-	if(Adjacent(user))
+	if(distance < 2)
 		show_content(user)
 	else
 		. += "<span class='notice'>It is too far away.</span>"
@@ -243,4 +243,4 @@
 	if(photo)
 		desc += "\nThere is a photo attached to it."
 	add_overlay(image('icons/obj/bureaucracy.dmi', "clip"))
-	return
+	return

code/modules/paperwork/paper_sticky.dm

@@ -48,7 +48,7 @@
 		return
 	..()
 
-/obj/item/sticky_pad/examine(var/mob/user)
+/obj/item/sticky_pad/examine(mob/user, distance, infix, suffix)
 	. = ..()
 	if(.)
 		to_chat(user, SPAN_NOTICE("It has [papers] [papername]\s left in the stack."))
@@ -150,4 +150,4 @@
 				if(dir_offset & NORTH)
 					pixel_y += 32
 				else if(dir_offset & SOUTH)
-					pixel_y -= 32
+					pixel_y -= 32

code/modules/paperwork/paperbin.dm

@@ -95,9 +95,9 @@
 	amount++
 
 
-/obj/item/paper_bin/examine(mob/user)
+/obj/item/paper_bin/examine(mob/user, distance, infix, suffix)
 	. = ..()
-	if(Adjacent(user))
+	if(distance < 2)
 		if(amount)
 			. += "<span class='notice'>There " + (amount > 1 ? "are [amount] papers" : "is one paper") + " in the bin.</span>"
 		else

code/modules/paperwork/photocopier.dm

@@ -21,9 +21,9 @@
 	. = ..()
 	default_apply_parts()
 
-/obj/machinery/photocopier/examine(mob/user as mob)
+/obj/machinery/photocopier/examine(mob/user, distance, infix, suffix)
 	. = ..()
-	if(Adjacent(user))
+	if(distance < 2)
 		. += "The screen shows there's [toner ? "[toner]" : "no"] toner left in the printer."
 
 /obj/machinery/photocopier/attack_ai(mob/user as mob)

code/modules/paperwork/photography.dm

@@ -51,9 +51,9 @@ var/global/photo_count = 0
 			scribble = txt
 	..()
 
-/obj/item/photo/examine(mob/user)
+/obj/item/photo/examine(mob/user, distance, infix, suffix)
 	//This is one time we're not going to call parent, because photos are 'secret' unless you're close enough.
-	if(in_range(user, src))
+	if(distance < 2)
 		show(user)
 		return list(desc)
 	else