mirror of
https://github.com/lihop/godot-xterm.git
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68 lines
2 KiB
GDScript
68 lines
2 KiB
GDScript
# Copyright (c) 2018 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 "res://addons/godot_xterm/buffer/attribute_data.gd"
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# CellData - represents a single cell in the terminal buffer.
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const Decoder = preload("res://addons/godot_xterm/input/text_decoder.gd")
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const Content = Constants.Content
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# Helper to create CellData from CharData
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static func from_char_data(value):
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# Workaround as per: https://github.com/godotengine/godot/issues/19345#issuecomment-471218401
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var char_data = load("res://addons/godot_xterm/buffer/cell_data.gd").new()
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char_data.set_from_char_data(value)
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return char_data
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# Primitives from terminal buffer
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var content = 0
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var combined_data = ''
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# Whether cell contains a combined string
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func is_combined() -> int:
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return content & Content.IS_COMBINED_MASK
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func get_width() -> int:
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return content >> Content.WIDTH_SHIFT
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func get_chars() -> String:
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if content & Content.IS_COMBINED_MASK:
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return combined_data
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elif content & Content.CODEPOINT_MASK:
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return char(content & Content.CODEPOINT_MASK)
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else:
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return Constants.NULL_CELL_CHAR
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func get_code() -> int:
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if is_combined():
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return combined_data.ord_at(combined_data.length() - 1)
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else:
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return content & Content.CODEPOINT_MASK
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func set_from_char_data(value) -> void:
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var attr: int = value[Constants.CHAR_DATA_ATTR_INDEX]
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var character: String = value[Constants.CHAR_DATA_CHAR_INDEX]
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var width: int = value[Constants.CHAR_DATA_WIDTH_INDEX]
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var code: int = value[Constants.CHAR_DATA_CODE_INDEX]
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fg = attr
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bg = 0
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# combined strings need special treatment. Javascript uses utf16 for strings
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# whereas Godot uses utf8, therefore we don't need any of the special
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# handling of surrogates in the original xterm.js code.
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if character.length() >= 2:
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combined_data = character
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content = Content.IS_COMBINED_MASK | (width << Content.WIDTH_SHIFT)
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else:
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content = (character.ord_at(0) if character.length() else 0) | (width << Content.WIDTH_SHIFT)
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func get_as_char_data():
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return [fg, get_chars(), get_width(), get_code()]
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