animationplayer_play: Add an extension script to generate an option list

This extension customizes the block's "animation" options list using the
list of animations in the block script's context node.

https://phabricator.endlessm.com/T35564

Author: dylanmccall

addons/block_code/blocks/graphics/animationplayer_play.gd

@@ -0,0 +1,15 @@
+@tool
+extends BlockExtension
+
+const OptionData = preload("res://addons/block_code/code_generation/option_data.gd")
+
+
+func get_defaults_for_node(context_node: Node) -> Dictionary:
+	var animation_player = context_node as AnimationPlayer
+
+	if not animation_player:
+		return {}
+
+	var animation_list = animation_player.get_animation_list()
+
+	return {"animation": OptionData.new(animation_list)}

addons/block_code/blocks/graphics/animationplayer_play.tres

@@ -1,7 +1,8 @@
-[gd_resource type="Resource" load_steps=4 format=3 uid="uid://c5e1byehtxwc0"]
+[gd_resource type="Resource" load_steps=5 format=3 uid="uid://c5e1byehtxwc0"]
 
 [ext_resource type="Script" path="res://addons/block_code/code_generation/block_definition.gd" id="1_emeuv"]
 [ext_resource type="Script" path="res://addons/block_code/code_generation/option_data.gd" id="1_xu43h"]
+[ext_resource type="Script" path="res://addons/block_code/blocks/graphics/animationplayer_play.gd" id="2_7ymgi"]
 
 [sub_resource type="Resource" id="Resource_vnp2w"]
 script = ExtResource("1_xu43h")
@@ -16,14 +17,15 @@ description = "Play the animation."
 category = "Graphics | Animation"
 type = 2
 variant_type = 0
-display_template = "Play {animation: STRING} {direction: OPTION}"
+display_template = "Play {animation: OPTION} {direction: OPTION}"
 code_template = "if \"{direction}\" == \"ahead\":
-	play({animation})
+	play(\"{animation}\")
 else:
-	play_backwards({animation})
+	play_backwards(\"{animation}\")
 "
 defaults = {
 "direction": SubResource("Resource_vnp2w")
 }
 signal_name = ""
 scope = ""
+extension_script = ExtResource("2_7ymgi")

addons/block_code/code_generation/block_definition.gd

@@ -64,5 +64,15 @@ func _init(
 	extension_script = p_extension_script
 
 
+func get_defaults_for_node(parent_node: Node) -> Dictionary:
+	if not _extension:
+		return defaults
+
+	# Use Dictionary.merge instead of Dictionary.merged for Godot 4.2 compatibility
+	var new_defaults := _extension.get_defaults_for_node(parent_node)
+	new_defaults.merge(defaults)
+	return new_defaults
+
+
 func _to_string():
 	return "%s - %s" % [name, target_node_class]

addons/block_code/code_generation/block_extension.gd

@@ -1,3 +1,7 @@
 @tool
 class_name BlockExtension
 extends Object
+
+
+func get_defaults_for_node(context_node: Node) -> Dictionary:
+	return {}