Initial commit, layout mockup

addons/dockable_container/layout_panel.gd

@@ -0,0 +1,89 @@
+@tool
+class_name DockableLayoutPanel
+extends DockableLayoutNode
+## DockableLayout leaf nodes, defining tabs
+
+@export var names: PackedStringArray:
+	get:
+		return get_names()
+	set(value):
+		_names = value
+		emit_tree_changed()
+@export var current_tab: int:
+	get:
+		return int(clamp(_current_tab, 0, _names.size() - 1))
+	set(value):
+		if value != _current_tab:
+			_current_tab = value
+			emit_tree_changed()
+
+var _names := PackedStringArray()
+var _current_tab := 0
+
+
+func _init() -> void:
+	resource_name = "Tabs"
+
+
+## Returns all tab names in this node
+func get_names() -> PackedStringArray:
+	return _names
+
+
+func push_name(name: String) -> void:
+	_names.append(name)
+	emit_tree_changed()
+
+
+func insert_node(position: int, node: Node) -> void:
+	_names.insert(position, node.name)
+	emit_tree_changed()
+
+
+func find_name(node_name: String) -> int:
+	for i in _names.size():
+		if _names[i] == node_name:
+			return i
+	return -1
+
+
+func find_child(node: Node) -> int:
+	return find_name(node.name)
+
+
+func remove_node(node: Node) -> void:
+	var i := find_child(node)
+	if i >= 0:
+		_names.remove_at(i)
+		emit_tree_changed()
+	else:
+		push_warning("Remove failed, node '%s' was not found" % node)
+
+
+func rename_node(previous_name: String, new_name: String) -> void:
+	var i := find_name(previous_name)
+	if i >= 0:
+		_names.set(i, new_name)
+		emit_tree_changed()
+	else:
+		push_warning("Rename failed, name '%s' was not found" % previous_name)
+
+
+## Returns whether there are any nodes
+func is_empty() -> bool:
+	return _names.is_empty()
+
+
+func update_nodes(node_names: PackedStringArray, data: Dictionary) -> void:
+	var i := 0
+	var removed_any := false
+	while i < _names.size():
+		var current := _names[i]
+		if not current in node_names or data.has(current):
+			_names.remove_at(i)
+			removed_any = true
+		else:
+			data[current] = self
+			i += 1
+	if removed_any:
+		emit_tree_changed()