GDScript: show properties added with _get_property_list() in the code completion popup

[mrcdk]

Godot version:

Godot 3.1 beta 1

I wanted to have some dynamic properties added with _get_property_list() to show in the code completion popup so I wrote this script as an autoload:

tool
extends Node

var layers = Dictionary()

func _init():
	print(get_property_list())
	property_list_changed_notify()
	
func _get_layers():
	var layers = {}
	for i in 20:
		var s = ProjectSettings.get('layer_names/2d_physics/layer_%s' % [i+1])
		if s:
			layers[s] = 1 << i
			
	return layers

func _get(key):
	if layers.has(key):
		return layers[key]
	
	return null
	
func _set(key, value):
	return false
	
func _get_property_list():
	layers = _get_layers()
	var result = []
	for layer in layers.keys():
		result.push_back({
			"name": layer,
			"type": TYPE_INT,
			"usage": PROPERTY_USAGE_SCRIPT_VARIABLE
		})
	return result

It doesn't work so I went to the source code and I think I found why. The code completion calls this function: https://github.com/godotengine/godot/blob/master/modules/gdscript/gdscript.cpp#L239-L264 which doesn't call the script's _get_property_list() function while the function get_property_list() call this one: https://github.com/godotengine/godot/blob/master/modules/gdscript/gdscript.cpp#L1059-L1128 which does call it and returns the property list with the ones added with _get_property_list().

Would it be possible to call GDScriptIntance::get_property_list() from GDScript::get_script_property_list() or would that hurt performance somehow?

[willnationsdev]

I'd be interested in seeing this implemented as well. It's very frustrating considering that a lot of features can only be done using _get_property_list().

[mrcdk]

I went ahead and tried to implement this in the gdscript editor. What I did does work but I'm not sure if it's going to be the best way to do it.