mirror of
https://github.com/lihop/godot-xterm.git
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104 lines
2.9 KiB
GDScript
104 lines
2.9 KiB
GDScript
# Copyright (c) 2020 The GodotTerm authors.
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# Copyright (c) 2019 The xterm.js authors. All rights reserved.
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# License MIT
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extends Reference
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# Max value supported for a single param/subparam (clamped to positive int32 range).
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const MAX_VALUE = 0x7FFFFFFF;
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# Max allowed subparams for a single sequence (hardcoded limitation).
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const MAX_SUBPARAMS = 256;
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var params = []
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var length = 0
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var sub_params = []
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var sub_params_length = 0
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var _max_length
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var _max_sub_params_length
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var sub_params_idx = []
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var _reject_digits = false
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var _reject_sub_digits = false
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var digit_is_sub = false
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static func from_array(values: Array):
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# Workaround as per: https://github.com/godotengine/godot/issues/19345#issuecomment-471218401
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var params = load("res://addons/godot_xterm/parser/params.gd").new()
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if values.empty():
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return params
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# skip leading sub params
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for i in range(values.size()):
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var value = values[i]
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if typeof(value) == TYPE_ARRAY:
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if i == 0:
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# skip leading sub params
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continue
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else:
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for sub_param in value:
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params.add_sub_param(sub_param)
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else:
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params.add_param(value)
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return params
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func _init(max_length: int = 32, max_sub_params_length: int = 32):
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_max_length = max_length
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_max_sub_params_length = max_sub_params_length
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if (max_sub_params_length > MAX_SUBPARAMS):
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push_error("max_sub_params_length must not be greater than 256")
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params.resize(max_length)
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sub_params.resize(max_sub_params_length)
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sub_params_idx.resize(max_length)
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func add_param(value: int):
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digit_is_sub = false
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if length >= _max_length:
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_reject_digits = true
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return
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if value < -1:
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push_error('values lesser than -1 are not allowed')
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sub_params_idx[length] = sub_params_length << 8 | sub_params_length
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params[length] = MAX_VALUE if value > MAX_VALUE else value
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length += 1
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func add_sub_param(value: int):
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digit_is_sub = true
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if !length:
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return
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if _reject_digits or sub_params_length >= _max_sub_params_length:
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_reject_sub_digits = true
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return
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if value < -1:
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push_error('values lesser than -1 are not allowed')
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sub_params[sub_params_length] = MAX_VALUE if value > MAX_VALUE else value
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sub_params_length += 1
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sub_params_idx[length - 1] += 1
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func add_digit(value: int):
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print("adding digit: ", value, " is sub: ", digit_is_sub)
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var _length = sub_params_length if digit_is_sub else length
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if _reject_digits or (not _length) or (digit_is_sub and _reject_sub_digits):
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return
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var store = sub_params if digit_is_sub else params
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var cur = store[_length - 1]
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store[_length - 1] = min(cur * 10 + value, MAX_VALUE) if ~cur else value
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func to_array():
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var res = []
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for i in range(length):
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res.append(params[i])
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var start = sub_params_idx[i] >> 8
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var end = sub_params_idx[i] & 0xff
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if end - start > 0:
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res.append(sub_params.slice(start, end - 1))
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return res
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func reset():
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length = 0
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sub_params_length = 0
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_reject_digits = false
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_reject_sub_digits = false
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digit_is_sub = false
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