71 lines
2.6 KiB
GDScript
71 lines
2.6 KiB
GDScript
## VERTICAL SLICE - NOT FOR PRODUCTION
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## 模态层级状态机：登记序 = 树序 = z 遮挡序，打开显式隐藏其上方可见层、关闭恢复。
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## 层必须先 register 方可 open/close；遮挡由本类显式记账，不得靠树序巧合。
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## 纯逻辑类——Control 层由组合根喂入 register。
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extends RefCounted
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var _list: Array[Control] = [] # 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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var _tags := {} # modal → 排除组标签集（互斥域随层登记）
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# 排除组封闭词表（组合根登记用——新标签=改此处+评审，防调用点拼装回潮）
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const TAG_NON_LOCKING := "non_locking" # 开态不计入棋盘输入锁与角标置灰（调试浮窗默认开×遮挡复活×开态计入输入锁的组合=棋盘永久锁死）
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const TAG_SCREEN_STATE := "screen_state" # 常驻屏态（关卡地图屏——自身开态不计入本屏角标判据）
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func register(m: Control, tags: Array = []) -> void:
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_list.append(m)
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_tags[m] = tags
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func open(m: Control) -> void:
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var idx := _list.find(m)
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if idx < 0:
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push_error("ModalStack.open: 未登记层不可打开（register 先行）")
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return
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var hidden: Array[Control] = []
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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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# 遮挡账合并非覆盖：同层重复 open 时上方已隐、hidden 为空，旧账须保留
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# （空表覆盖会让先前被隐层在本层 close 后永不恢复）
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var merged: Array[Control] = []
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for h in _occluded.get(m, []):
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if not merged.has(h):
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merged.append(h)
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for h in hidden:
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if not merged.has(h):
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merged.append(h)
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_occluded[m] = merged
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m.visible = true
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func close(m: Control) -> void:
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if _list.find(m) < 0:
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push_error("ModalStack.close: 未登记层不可关闭（register 先行）")
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return
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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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# 排除组开态查询（模态协议内聚：排除语义随层登记（register tags），
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# 查询按组名集合表达，禁在调用点拼装 has_open_excluding/has_open_excluding_any。
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# 只读查询零副作用——登记序/开合记账语义不变；空标签集=全计。
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func has_open_excluding_tags(exclude_tags: Array) -> bool:
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for m in _list:
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if is_instance_valid(m) and m.visible:
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var mt: Array[Variant] = _tags.get(m, [])
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var excluded := false
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for t in exclude_tags:
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if mt.has(t):
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excluded = true
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break
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if not excluded:
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return true
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return false
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