39 lines
1.1 KiB
GDScript
39 lines
1.1 KiB
GDScript
@tool
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@icon("expression_guard.svg")
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class_name ExpressionGuard
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extends Guard
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const ExpressionUtil = preload("expression_util.gd")
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const DebugUtil = preload("debug_util.gd")
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var expression:String = ""
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func is_satisfied(context_transition:Transition, context_state:StateChartState) -> bool:
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var root:StateChart = context_state._chart
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if not is_instance_valid(root):
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push_error("Could not find root state chart node, cannot evaluate expression")
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return false
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var result:Variant = ExpressionUtil.evaluate_expression("guard in " + DebugUtil.path_of(context_transition), root, expression, false)
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if typeof(result) != TYPE_BOOL:
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push_error("Expression: ", expression ," result: ", result, " is not a boolean. Returning false.")
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return false
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return result
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func get_supported_trigger_types() -> int:
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return StateChart.TriggerType.PROPERTY_CHANGE
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func _get_property_list() -> Array[Dictionary]:
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var properties:Array[Dictionary] = []
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properties.append({
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"name": "expression",
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"type": TYPE_STRING,
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"usage": PROPERTY_USAGE_DEFAULT,
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"hint": PROPERTY_HINT_EXPRESSION
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})
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return properties
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