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[ruby/reline] not clear scrollback buffer

Browse source 
https://github.com/ruby/reline/commit/ba800f1461
This commit is contained in:
Yoshinao Muramatu 2020-08-30 14:42:41 +09:00 • committed by aycabta
parent 0862744010
commit a840ef8569
1 changed files with 8 additions and 6 deletions
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14
lib/reline/windows.rb
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@ -250,15 +250,17 @@ class Reline::Windows
end
def self.clear_screen
coord_screen_top_left = 0
written = 0.chr * 4
csbi = 0.chr * 22
return if @@GetConsoleScreenBufferInfo.call(@@hConsoleHandle, csbi) == 0
con_size = csbi[0, 4].unpack('SS').inject(:*)
buffer_width = csbi[0, 2].unpack('S').first
attributes = csbi[8, 2].unpack('S').first
@@FillConsoleOutputCharacter.call(@@hConsoleHandle, 0x20, con_size, coord_screen_top_left, written)
@@FillConsoleOutputAttribute.call(@@hConsoleHandle, attributes, con_size, coord_screen_top_left, written)
@@SetConsoleCursorPosition.call(@@hConsoleHandle, coord_screen_top_left)
window_left, window_top, window_right, window_bottom = *csbi[10,8].unpack('S*')
fill_length = buffer_width * (window_bottom - window_top + 1)
screen_topleft = window_top * 65536
written = 0.chr * 4
@@FillConsoleOutputCharacter.call(@@hConsoleHandle, 0x20, fill_length, screen_topleft, written)
@@FillConsoleOutputAttribute.call(@@hConsoleHandle, attributes, fill_length, screen_topleft, written)
@@SetConsoleCursorPosition.call(@@hConsoleHandle, screen_topleft)
end
def self.set_screen_size(rows, columns)