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https://github.com/lihop/godot-xterm.git
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55 lines
1.5 KiB
GDScript
55 lines
1.5 KiB
GDScript
# Copyright (c) 2017 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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const Buffer = preload("res://addons/godot_xterm/buffer/buffer.gd")
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signal buffer_activated(active_buffer, inactive_buffer)
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var normal
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var alt
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var active
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func _init(options_service, buffer_service):
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normal = Buffer.new(true, options_service, buffer_service)
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normal.fill_viewport_rows()
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# The alt buffer should never have scrollback.
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# See http://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-The-Alternate-Screen-Buffer
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alt = Buffer.new(false, options_service, buffer_service)
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active = normal
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# TODO
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#setup_tab_stops()
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# Sets the normal Bufer of the BufferSet as its currently active Buffer.
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func activate_normal_buffer() -> void:
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if active == normal:
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return
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normal.x = alt.x
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normal.y = alt.y
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# The alt buffer should always be cleared when we switch to the normal
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# buffer. This frees up memory since the alt buffer should always be new
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# when activated.
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alt.clear()
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active = normal
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emit_signal("buffer_activated", normal, alt)
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# Sets the alt Buffer of the BufferSet as its currently active Buffer.
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func activate_alt_buffer(fill_attr = null) -> void:
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if active == alt:
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return
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# Since the alt buffer is always cleared when the normal buffer is
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# activated, we want to fill it when switching to it.
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alt.fill_viewport_rows(fill_attr)
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alt.x = normal.x
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alt.y = normal.y
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active = alt
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emit_signal("buffer_activated", alt, normal)
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