Merge pull request #316 from endlessm/T35649-fix-drag-drop-obj-property

BlockScriptSerialization: Re-generate block definition for object property blocks

addons/block_code/block_code_node/block_code.gd

@@ -5,7 +5,8 @@ extends Node
 
 const TxUtils := preload("res://addons/block_code/translation/utils.gd")
 
-@export var block_script: BlockScriptSerialization = null
+@export var block_script: BlockScriptSerialization = null:
+	set = _set_block_script
 
 
 func _init():
@@ -37,6 +38,17 @@ func _enter_tree():
 		block_script = new_block_script
 
 
+func _set_block_script(value):
+	if value == null:
+		# Wipe out the bidirectional link between this block code node and the
+		# block script
+		if block_script:
+			block_script.block_code_node = null
+	else:
+		value.block_code_node = self
+	block_script = value
+
+
 func _update_parent_script():
 	if Engine.is_editor_hint():
 		push_error("Updating the parent script must happen in game.")

addons/block_code/code_generation/blocks_catalog.gd

@@ -253,25 +253,52 @@ static func add_custom_blocks(
 static func get_variable_block_definitions(variables: Array[VariableDefinition]) -> Array[BlockDefinition]:
 	var block_definitions: Array[BlockDefinition] = []
 	for variable: VariableDefinition in variables:
-		var type_string: String = Types.VARIANT_TYPE_TO_STRING[variable.var_type]
+		var block_def: BlockDefinition
 
 		# Getter
-		var block_def = BlockDefinition.new()
-		block_def.name = "get_var_%s" % variable.var_name
-		block_def.category = "Variables"
-		block_def.type = Types.BlockType.VALUE
-		block_def.variant_type = variable.var_type
-		block_def.display_template = variable.var_name
-		block_def.code_template = variable.var_name
+		block_def = get_variable_getter_block_definition(variable)
 		block_definitions.append(block_def)
 
 		# Setter
-		block_def = BlockDefinition.new()
-		block_def.name = "set_var_%s" % variable.var_name
-		block_def.category = "Variables"
-		block_def.type = Types.BlockType.STATEMENT
-		block_def.display_template = "Set %s to {value: %s}" % [variable.var_name, type_string]
-		block_def.code_template = "%s = {value}" % [variable.var_name]
+		block_def = get_variable_setter_block_definition(variable)
 		block_definitions.append(block_def)
 
 	return block_definitions
+
+
+static func get_variable_getter_block_definition(variable: VariableDefinition) -> BlockDefinition:
+	var block_def := BlockDefinition.new()
+
+	block_def.name = "get_var_%s" % variable.var_name
+	block_def.category = "Variables"
+	block_def.type = Types.BlockType.VALUE
+	block_def.variant_type = variable.var_type
+	block_def.display_template = variable.var_name
+	block_def.code_template = variable.var_name
+
+	return block_def
+
+
+static func get_variable_setter_block_definition(variable: VariableDefinition) -> BlockDefinition:
+	var type_string: String = Types.VARIANT_TYPE_TO_STRING[variable.var_type]
+	var block_def := BlockDefinition.new()
+
+	block_def.name = "set_var_%s" % variable.var_name
+	block_def.category = "Variables"
+	block_def.type = Types.BlockType.STATEMENT
+	block_def.display_template = "Set %s to {value: %s}" % [variable.var_name, type_string]
+	block_def.code_template = "%s = {value}" % variable.var_name
+
+	return block_def
+
+
+static func get_property_getter_block_definition(variable: VariableDefinition) -> BlockDefinition:
+	var block_def := get_variable_getter_block_definition(variable)
+	block_def.description = "The %s property" % variable.var_name
+	return block_def
+
+
+static func get_property_setter_block_definition(variable: VariableDefinition) -> BlockDefinition:
+	var block_def := get_variable_setter_block_definition(variable)
+	block_def.description = "Set the %s property" % variable.var_name
+	return block_def

addons/block_code/serialization/block_script_serialization.gd

@@ -28,6 +28,8 @@ const SCENE_PER_TYPE = {
 @export var generated_script: String
 @export var version: int
 
+var block_code_node: BlockCode
+
 var _available_blocks: Array[BlockDefinition]
 var _categories: Array[BlockCategory]
 
@@ -81,22 +83,26 @@ func instantiate_block_by_name(block_name: String) -> Block:
 
 func get_block_definition(block_name: String) -> BlockDefinition:
 	var split := block_name.split(":", true, 1)
+	var block_definition: BlockDefinition
 
 	if len(split) > 1:
 		return _get_parameter_block_definition(split[0], split[1])
 
-	var block_definition = _get_base_block_definition(block_name)
+	block_definition = _get_base_block_definition(block_name)
+	if block_definition != null:
+		return block_definition
 
-	if block_definition == null:
-		# FIXME: This is a workaround for old-style output block references.
-		#        These were generated ahead of time using a block name that has
-		#        a "_" before the parameter name. Now, these parameter blocks
-		#        are generated on demand for any block name containing a ":".
-		#        Please remove this fallback when it is no longer necessary.
-		split = block_name.rsplit("_", true, 1)
-		return _get_parameter_block_definition(split[0], split[1])
+	block_definition = _get_obj_property_block_definition(block_name)
+	if block_definition != null:
+		return block_definition
 
-	return block_definition
+	# FIXME: This is a workaround for old-style output block references.
+	#        These were generated ahead of time using a block name that has
+	#        a "_" before the parameter name. Now, these parameter blocks
+	#        are generated on demand for any block name containing a ":".
+	#        Please remove this fallback when it is no longer necessary.
+	split = block_name.rsplit("_", true, 1)
+	return _get_parameter_block_definition(split[0], split[1])
 
 
 func _get_base_block_definition(block_name: String) -> BlockDefinition:
@@ -133,6 +139,49 @@ func _get_parameter_block_definition(block_name: String, parameter_name: String)
 	return block_definition
 
 
+func _get_obj_property_block_definition(block_name: String) -> BlockDefinition:
+	var block_definition: BlockDefinition
+	var variable: VariableDefinition
+	var property_name: String
+	var is_getter = true
+
+	if block_name.begins_with("get_var_"):
+		property_name = block_name.get_slice("get_var_", 1)
+	elif block_name.begins_with("set_var_"):
+		property_name = block_name.get_slice("set_var_", 1)
+		is_getter = false
+	else:
+		return null
+
+	# Getter block needs the property's variant type information by visiting the
+	# block_code_node's parent node because the type is not saved as a key of
+	# the resource in the scene file
+	var property_info := _get_parent_node_property_info(property_name)
+	if not property_info.has("type"):
+		return null
+
+	if is_getter:
+		variable = VariableDefinition.new(property_name, property_info["type"])
+		block_definition = BlocksCatalog.get_property_getter_block_definition(variable)
+	else:
+		variable = VariableDefinition.new(property_name, property_info["type"])
+		block_definition = BlocksCatalog.get_property_setter_block_definition(variable)
+
+	return block_definition
+
+
+func _get_parent_node_property_info(property_name: String) -> Dictionary:
+	if not block_code_node:
+		return {}
+
+	var properties := block_code_node.get_parent().get_property_list()
+	for property in properties:
+		if property["name"] == property_name:
+			return property
+
+	return {}
+
+
 func _update_block_definitions():
 	_available_blocks.clear()
 	_available_blocks.append_array(_get_inherited_block_definitions())

addons/block_code/ui/block_canvas/block_canvas.gd

@@ -3,13 +3,15 @@ extends MarginContainer
 
 const ASTList = preload("res://addons/block_code/code_generation/ast_list.gd")
 const BlockAST = preload("res://addons/block_code/code_generation/block_ast.gd")
+const BlocksCatalog = preload("res://addons/block_code/code_generation/blocks_catalog.gd")
 const BlockCodePlugin = preload("res://addons/block_code/block_code_plugin.gd")
 const BlockDefinition = preload("res://addons/block_code/code_generation/block_definition.gd")
 const BlockTreeUtil = preload("res://addons/block_code/ui/block_tree_util.gd")
 const DragManager = preload("res://addons/block_code/drag_manager/drag_manager.gd")
 const ScriptGenerator = preload("res://addons/block_code/code_generation/script_generator.gd")
 const Types = preload("res://addons/block_code/types/types.gd")
 const Util = preload("res://addons/block_code/ui/util.gd")
+const VariableDefinition = preload("res://addons/block_code/code_generation/variable_definition.gd")
 
 const EXTEND_MARGIN: float = 800
 const BLOCK_AUTO_PLACE_MARGIN: Vector2 = Vector2(25, 8)
@@ -79,8 +81,10 @@ func _can_drop_data(at_position: Vector2, data: Variant) -> bool:
 	if typeof(data) != TYPE_DICTIONARY:
 		return false
 
-	# Allow dropping property block
+	# Allow dropping property block of the block code node's parent node
 	if data.get("type", "") == "obj_property":
+		if data["object"] != _context.parent_node:
+			return false
 		return true
 
 	var nodes: Array = data.get("nodes", [])
@@ -124,44 +128,20 @@ func _drop_node(at_position: Vector2, data: Variant) -> void:
 
 
 func _drop_obj_property(at_position: Vector2, data: Variant) -> void:
-	var object_name = str(data["object"]).get_slice(":", 0)
 	var property_name = data["property"]
 	var property_value = data["value"]
+	var is_getter = !_modifier_ctrl
 
 	# Prepare a Variable block to set / get the property's value according to
 	# the modifier KEY_CTRL pressing.
+	var variable := VariableDefinition.new(property_name, typeof(property_value))
 	var block_definition: BlockDefinition
-	var property_type = typeof(property_value)
-	if _modifier_ctrl:
-		var type_string: String = Types.VARIANT_TYPE_TO_STRING[property_type]
-		block_definition = (
-			BlockDefinition
-			. new(
-				&"%s_set_%s" % [object_name, property_name],
-				object_name,
-				"Set the %s property" % property_name,
-				"Variables",
-				Types.BlockType.STATEMENT,
-				property_type,
-				"set %s to {value: %s}" % [property_name.capitalize().to_lower(), type_string],
-				"%s = {value}" % property_name,
-				{"value": property_value},
-			)
-		)
+
+	if is_getter:
+		block_definition = BlocksCatalog.get_property_getter_block_definition(variable)
 	else:
-		block_definition = (
-			BlockDefinition
-			. new(
-				&"%s_get_%s" % [object_name, property_name],
-				object_name,
-				"The %s property" % property_name,
-				"Variables",
-				Types.BlockType.VALUE,
-				property_type,
-				"%s" % property_name.capitalize().to_lower(),
-				"%s" % property_name,
-			)
-		)
+		block_definition = BlocksCatalog.get_property_setter_block_definition(variable)
+		block_definition.defaults = {"value": property_value}
 
 	var block = _context.block_script.instantiate_block(block_definition)
 	add_block(block, at_position)