Port TG pointing to inventory thought bubble, and expand valid pointing targets (#19072)

* Well that actually works

* Update atoms_movable.dm

* Now you can point at things inside of things.

code/modules/point/point.dm

@@ -0,0 +1,113 @@
+#define POINT_TIME (2.5 SECONDS)
+
+/**
+ * Point at an atom
+ *
+ * Intended to enable and standardise the pointing animation for all atoms
+ *
+ * Not intended as a replacement for the mob verb
+ */
+/atom/movable/proc/point_at(atom/pointed_atom)
+	if(!isturf(loc))
+		return
+
+	if((pointed_atom in src) || (pointed_atom.loc in src))
+		create_point_bubble(pointed_atom)
+		return
+
+	var/turf/tile = get_turf(pointed_atom)
+	if(!tile)
+		return
+
+	var/turf/our_tile = get_turf(src)
+	var/obj/visual = new /obj/effect/temp_visual/point(our_tile, invisibility)
+
+	animate(visual, pixel_x = (tile.x - our_tile.x) * world.icon_size + pointed_atom.pixel_x, pixel_y = (tile.y - our_tile.y) * world.icon_size + pointed_atom.pixel_y, time = 1.7, easing = EASE_OUT)
+
+/atom/movable/proc/create_point_bubble(atom/pointed_atom)
+	var/obj/effect/thought_bubble_effect = new
+
+	var/mutable_appearance/thought_bubble = mutable_appearance(
+		'icons/effects/effects.dmi',
+		thought_bubble_image,
+		layer = POINT_LAYER,
+		appearance_flags = KEEP_APART,
+	)
+
+	var/mutable_appearance/pointed_atom_appearance = new(pointed_atom.appearance)
+	pointed_atom_appearance.blend_mode = BLEND_INSET_OVERLAY
+	pointed_atom_appearance.layer = POINT_LAYER
+	pointed_atom_appearance.pixel_x = 0
+	pointed_atom_appearance.pixel_y = 0
+	thought_bubble.overlays += pointed_atom_appearance
+
+	var/hover_outline_index = pointed_atom.get_filter("hover_outline")
+	if (!isnull(hover_outline_index))
+		pointed_atom_appearance.filters.Cut(hover_outline_index, hover_outline_index + 1)
+
+	thought_bubble.pixel_x = 16
+	thought_bubble.pixel_y = 32
+	thought_bubble.alpha = 200
+	thought_bubble.mouse_opacity = MOUSE_OPACITY_TRANSPARENT
+
+	var/mutable_appearance/point_visual = mutable_appearance(
+		'icons/mob/screen_gen.dmi',
+		"arrow",
+		layer = thought_bubble.layer,
+	)
+
+	point_visual.pixel_y = 7
+	thought_bubble.overlays += point_visual
+	thought_bubble.plane = POINT_PLANE
+
+	// vis_contents is used to preserve mouse opacity
+	thought_bubble_effect.appearance = thought_bubble
+	vis_contents += thought_bubble_effect
+
+	QDEL_IN(thought_bubble_effect, 2 SECONDS)
+
+/obj/effect/temp_visual/point
+	name = "arrow"
+	desc = "It's an arrow hanging in mid-air. There may be a wizard about."
+	icon = 'icons/mob/screen_gen.dmi'
+	icon_state = "arrow"
+	layer = POINT_LAYER
+	duration = 2 SECONDS
+	randomdir = FALSE
+
+/obj/effect/temp_visual/point/Initialize(mapload, set_invis = 0)
+	. = ..()
+	invisibility = set_invis
+
+#undef POINT_TIME
+
+/**
+ * Point at an atom
+ *
+ * mob verbs are faster than object verbs. See
+ * [this byond forum post](https://secure.byond.com/forum/?post=1326139&page=2#comment8198716)
+ * for why this isn't atom/verb/pointed()
+ *
+ * note: ghosts can point, this is intended
+ *
+ * visible_message will handle invisibility properly
+ *
+ * overridden here and in /mob/dead/observer for different point span classes and sanity checks
+ */
+/mob/verb/pointed(atom/A as mob|obj|turf in view())
+	set name = "Point To"
+	set category = "Object"
+
+	if(istype(A, /obj/effect/temp_visual/point) || istype(A, /atom/movable/emissive_blocker))
+		return FALSE
+
+	if(A.loc in src) // Object is inside a container on the mob. It's not part of the verb's list since it's not in view and requires middle clicking.
+		point_at(A)
+		return TRUE
+
+	if(client && !(A in view(client.view, src)))
+		return FALSE
+
+	point_at(A)
+
+	return TRUE