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Avoid using CSI S sequence for scroll down #577

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Merged
tompng merged 1 commit into from
Jul 25, 2023
Merged

Avoid using CSI S sequence for scroll down #577

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5 changes: 4 additions & 1 deletion lib/reline/ansi.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -335,9 +335,12 @@ def self.erase_after_cursor
@@output.write "\e[K"
end

# This only works when the cursor is at the bottom of the scroll range
# For more details, see https://github.com/ruby/reline/pull/577#issuecomment-1646679623
def self.scroll_down(x)
return if x.zero?
@@output.write "\e[#{x}S"
# We use `\n` instead of CSI + S because CSI + S would cause https://github.com/ruby/reline/issues/576
@@output.write "\n" * x
end

def self.clear_screen
Expand Down