35 lines
1.2 KiB
GDScript
35 lines
1.2 KiB
GDScript
# VERTICAL SLICE - NOT FOR PRODUCTION
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# 实现 GDD：design/ux/interaction-patterns.md（pattern 6 模态 overlay 层级纪律）。
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# Date: 2026-09-12（code-review 修复批——自 main.gd 拆出，规范 1.1 状态装配独立成类）
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# 模态层级状态机：登记序 = 树序 = z 遮挡序；打开时显式隐藏树序在其上方的可见层、关闭恢复
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# （缺陷⑤纪律载体：功能存在 ≠ 功能可达——遮挡关系不得靠树序巧合）。
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# 纯逻辑零节点构建——组合根持有本类并喂入 Control；不持久化核心状态。
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extends RefCounted
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var _list: Array = [] # 登记序 = z 遮挡序（低 → 高）
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var _occluded := {} # modal → 被其隐藏的上方层（关闭恢复）
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func register(m: Control) -> void:
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_list.append(m)
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func open(m: Control) -> void:
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var hidden: Array = []
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var idx := _list.find(m)
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for i in range(idx + 1, _list.size()):
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var higher: Control = _list[i]
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if is_instance_valid(higher) and higher.visible:
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higher.visible = false
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hidden.append(higher)
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_occluded[m] = hidden
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m.visible = true
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func close(m: Control) -> void:
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m.visible = false
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for h in _occluded.get(m, []):
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if is_instance_valid(h):
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h.visible = true
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_occluded.erase(m)
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