feat: added expression value to every primitive

project/ui/primitive_inspectors/base_primitive_inspector.tscn

@@ -35,6 +35,36 @@ func _pressed() -> void:
 	terrain.current_selected = null
 "
 
+[sub_resource type="GDScript" id="GDScript_2i6ni"]
+resource_name = "ExpressionEditor"
+script/source = "extends TextEdit
+
+@onready var terrain : TerrainMeshEditor = $\"../../..\".terrain
+@onready var primitive : TerrainPrimitive = terrain.current_selected
+
+var pushing_change : bool = false
+
+func _ready():
+	primitive.changed.connect(_primitive_changed)
+	text_changed.connect(_text_changed)
+	$ExpressionTimerBuffer.timeout.connect(_timeout)
+	_primitive_changed()
+
+func _primitive_changed():
+	if not pushing_change and not has_focus():
+		pushing_change = true
+		self.text = primitive.expression
+		pushing_change = false
+	$\"../ExpressionError\".text = primitive.get_expression_error()
+	
+func _text_changed():
+	if not pushing_change:
+		$ExpressionTimerBuffer.start(2)
+
+func _timeout():
+	primitive.expression = text
+"
+
 [node name="Primitive" type="MarginContainer" unique_id=905749607]
 offset_right = 302.0
 offset_bottom = 230.0
@@ -91,6 +121,24 @@ icon_alignment = 1
 expand_icon = true
 script = SubResource("GDScript_ivj30")
 
+[node name="Expression" type="TextEdit" parent="VBoxContainer" unique_id=1154146381]
+layout_mode = 2
+size_flags_vertical = 3
+placeholder_text = "expression"
+backspace_deletes_composite_character_enabled = true
+caret_blink = true
+caret_move_on_right_click = false
+draw_tabs = true
+draw_spaces = true
+script = SubResource("GDScript_2i6ni")
+
+[node name="ExpressionTimerBuffer" type="Timer" parent="VBoxContainer/Expression" unique_id=1376932514]
+wait_time = 2.0
+
+[node name="ExpressionError" type="Label" parent="VBoxContainer" unique_id=1840569033]
+layout_mode = 2
+text = "Error Text"
+
 [connection signal="item_selected" from="VBoxContainer/BlendModeSelector" to="VBoxContainer/BlendModeSelector" method="_on_item_selected"]
 
 [editable path="VBoxContainer/FloatEditor3"]