mirror of
https://github.com/lihop/godot-xterm.git
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75 lines
1.6 KiB
GDScript
75 lines
1.6 KiB
GDScript
# Copyright (c) 2016 The xterm.js authors. All rights reserved.
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# Ported to GDScript by the GodotXterm authors.
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# License MIT
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extends Reference
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# Represents a circular list; a list with a maximum size that wraps around when push is called,
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# overriding values at the start of the list.
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signal deleted
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signal inserted
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signal trimmed
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var _array
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var _start_index: int
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var length: int = 0 setget _set_length,_get_length
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var max_length: int setget _set_max_length,_get_max_length
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func _set_length(new_length: int):
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if new_length > length:
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for i in range(length, new_length):
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_array[i] = null
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length = new_length
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func _get_length():
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return length
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func _set_max_length(new_max_length):
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if max_length == new_max_length:
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return
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# Reconstruct array, starting at index 0.
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# Only transfer values from the indexes 0 to length.
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var new_array = []
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new_array.resize(new_max_length)
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for i in range(0, min(new_max_length, length)):
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new_array[i] = _array[_get_cyclic_index(i)]
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_array = new_array
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max_length = new_max_length
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_start_index = 0
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func _get_max_length():
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return max_length
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func _init(max_length):
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self.max_length = max_length
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_array = []
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_array.resize(max_length)
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_start_index = 0
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func get_el(index: int):
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return _array[_get_cyclic_index(index)]
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func set_el(index: int, value) -> void:
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_array[_get_cyclic_index(index)] = value
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func push(value) -> void:
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_array[_get_cyclic_index(length)] = value
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if length == max_length:
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_start_index += 1
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_start_index %= max_length
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emit_signal("trimmed", 1)
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else:
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length += 1
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func _get_cyclic_index(index: int) -> int:
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return _start_index + index % max_length
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