Adds event/shenanigans vareditable shapeshifter mechanic (#6902)

code/modules/mob/mob_movement.dm

@@ -302,6 +302,10 @@
 	if((direct & (direct - 1)) && mob.loc == n)
 		my_mob.setMoveCooldown(total_delay * SQRT_2) //CHOMPEDIT
 
+	if(!isliving(my_mob)) //CHOMPAdd
+		moving = 0
+		return
+
 	// If we have a grab
 	var/list/grablist = my_mob.ret_grab()
 	if(LAZYLEN(grablist))

code/modules/vore/mouseray.dm

@@ -98,6 +98,9 @@
 			var/datum/ai_holder/our_AI = ourmob.ai_holder
 			our_AI.set_stance(STANCE_IDLE)
 		M.tf_mob_holder = null
+		var/ourmob_ckey  //CHOMPEdit Start
+		if(ourmob.ckey)
+			ourmob_ckey = ourmob.ckey
 		ourmob.ckey = M.ckey
 		var/turf/get_dat_turf = get_turf(target)
 		ourmob.loc = get_dat_turf
@@ -118,7 +121,13 @@
 					continue
 				M.drop_from_inventory(W)
 
-		qdel(target)
+		if(M.tf_form == ourmob)
+			if(ourmob_ckey)
+				M.ckey = ourmob_ckey
+			ourmob.tf_form = M
+			M.forceMove(ourmob)
+		else
+			qdel(target) //CHOMPEdit End
 		return
 	else
 		if(M.stat == DEAD)	//We can let it undo the TF, because the person will be dead, but otherwise things get weird.
@@ -186,6 +195,9 @@
 		var/datum/ai_holder/our_AI = ourmob.ai_holder
 		our_AI.set_stance(STANCE_IDLE)
 	tf_mob_holder = null
+	var/ourmob_ckey  //CHOMPEdit Start
+	if(ourmob.ckey)
+		ourmob_ckey = ourmob.ckey
 	ourmob.ckey = ckey
 	var/turf/get_dat_turf = get_turf(src)
 	ourmob.loc = get_dat_turf
@@ -207,7 +219,13 @@
 				continue
 			src.drop_from_inventory(W)
 
-	qdel(src)
+	if(tf_form == ourmob)
+		if(ourmob_ckey)
+			src.ckey = ourmob_ckey
+		ourmob.tf_form = src
+		src.forceMove(ourmob)
+	else
+		qdel(src) //CHOMPEdit End
 
 
 /mob/living/proc/handle_tf_holder()
@@ -309,6 +327,9 @@
 			var/datum/ai_holder/our_AI = ourmob.ai_holder
 			our_AI.set_stance(STANCE_IDLE)
 		M.tf_mob_holder = null
+		var/ourmob_ckey  //CHOMPEdit Start
+		if(ourmob.ckey)
+			ourmob_ckey = ourmob.ckey
 		ourmob.ckey = M.ckey
 		var/turf/get_dat_turf = get_turf(target)
 		ourmob.loc = get_dat_turf
@@ -330,7 +351,13 @@
 					continue
 				M.drop_from_inventory(W)
 
-		qdel(target)
+		if(M.tf_form == ourmob)
+			if(ourmob_ckey)
+				M.ckey = ourmob_ckey
+			ourmob.tf_form = M
+			M.forceMove(ourmob)
+		else
+			qdel(target) //CHOMPEdit End
 		firer.visible_message("<span class='notice'>\The [shot_from] boops pleasantly.</span>")
 		return
 	else

modular_chomp/code/modules/mob/living/living.dm

@@ -12,6 +12,7 @@
 	var/death_sound_override = null
 	var/virtual_reality_mob = FALSE // gross boolean for keeping VR mobs in VR
 	var/datum/looping_sound/mob/on_fire/firesoundloop
+	var/mob/living/tf_form // Shapeshifter shenanigans
 	// var/datum/looping_sound/mob/stunned/stunnedloop
 	/* // Not sure if needed, screams aren't a carbon thing rn.
 	var/scream_sound = null
@@ -92,7 +93,7 @@ Maybe later, gotta figure out a way to click yourself when in a locker etc.
 // For some reason upstream made a general revert proc but not a general transform proc, so here it is.
 // Requires a /mob/living type path for transformation. Returns the new mob on success, null in all other cases.
 // Just handles mob TF right now, but maybe we'll want to do something similar for items in the future.
-/mob/living/proc/transform_into_mob(mob/living/new_form, pref_override = FALSE, revert = FALSE)
+/mob/living/proc/transform_into_mob(mob/living/new_form, pref_override = FALSE, revert = FALSE, shapeshifting = FALSE)
 	if(!src.mind)
 		return
 	if(!src.allow_spontaneous_tf && !pref_override)
@@ -106,9 +107,19 @@ Maybe later, gotta figure out a way to click yourself when in a locker etc.
 	else
 		if(src.stat == DEAD)
 			return
-		if(!ispath(new_form, /mob/living))
+		if(!ispath(new_form, /mob/living) && !ismob(new_form))
 			return
-		var/mob/living/new_mob = new new_form(get_turf(src))
+		var/mob/living/new_mob
+		var/new_mob_ckey
+		if(shapeshifting && src.tf_form)
+			new_mob = src.tf_form
+			new_mob.verbs |= /mob/living/proc/shapeshift_form
+			new_mob.tf_form = src
+			new_mob.forceMove(src.loc)
+			if(new_mob.ckey)
+				new_mob_ckey = new_mob.ckey
+		else
+			new_mob = new new_form(get_turf(src))
 		new_mob.faction = src.faction
 
 		if(new_mob && isliving(new_mob))
@@ -144,6 +155,8 @@ Maybe later, gotta figure out a way to click yourself when in a locker etc.
 				new_mob.vore_organs += B
 
 			new_mob.ckey = src.ckey
+			if(new_mob_ckey)
+				src.ckey = new_mob_ckey
 			if(src.ai_holder && new_mob.ai_holder)
 				var/datum/ai_holder/old_AI = src.ai_holder
 				old_AI.set_stance(STANCE_SLEEP)
@@ -154,3 +167,13 @@ Maybe later, gotta figure out a way to click yourself when in a locker etc.
 			src.forceMove(new_mob)
 			new_mob.tf_mob_holder = src
 			return new_mob
+
+/mob/living/proc/shapeshift_form()
+	set name = "Shapeshift Form"
+	set category = "Abilities"
+	set desc = "Shape shift between set mob forms. (Requires a spawned mob to be varedited into the user's tf_form var as mob reference.)"
+	if(!istype(tf_form))
+		to_chat(src, "<span class='notice'>No shapeshift form set. (Requires a spawned mob to be varedited into the user's tf_form var as mob reference.)</span>")
+		return
+	else
+		transform_into_mob(tf_form, TRUE, TRUE, TRUE)